Why Spigot vs. Bolt Truss Connections Define Stage Truss Performance

When choosing an aluminum truss system, you have to consider more than just its size or appearance. The truss connections play a decisive role in the performance and practical use of the entire structure. For most stage truss projects, the choice narrows to two primary systems: spigot truss and bolt truss. Both are designed to build reliable and professional stage structures, but each offers unique advantages that directly affect performance for specific event setups.

The Advantages of Spigot Trusses

Most people choose spigot trusses because they are quick and easy to install. Installers often prefer this connection system when time is critical, such as during a rushed exhibition, a trade show, or a temporary stage setup. The spigot truss connection allows for rapid assembly and disassembly, enabling large stage truss frames to be built or dismantled in a fraction of the time compared to bolts. This efficiency not only saves labor, but also reduces logistical challenges, especially when equipment must be transported to multiple venues within a short time. 

The Strength of Bolt Trusses

Bolt trusses, on the other hand, meet a completely different set of requirements. Large concerts, outdoor music festivals, and long-term stage constructions often require truss systems that can withstand heavy loads and unpredictable conditions. The bolt truss system creates a rigid frame that maintains its structural integrity under stress. It is exceptionally strong and durable, which is why professionals in the stage truss industry rely on it for projects involving heavy LED screens or exposure to harsh outdoor environments. Although installation takes more time, experienced event coordinators know that the extra effort results in maximum safety and long-term reliability. For heavy-duty or permanent aluminum stage truss setups, the bolt option provides unmatched stability.

Choosing Based on Event Requirements

In the end, the decision between spigot truss and bolt truss depends entirely on the event requirements. Short-term projects with frequent mobility benefit from the speed and convenience of spigot trusses, while long-term installations with demanding load capacities require the security of bolt connections. Asking practical questions—such as how many kilograms the truss must support, how long the structure needs to remain in place, and whether it will be used indoors or outdoors—helps determine the most suitable solution.

Selecting the Best Truss System for Reliable Events

Investing in an aluminum truss system means investing in safety, reliability, and efficiency. Choosing the wrong type of stage truss can lead to unnecessary costs or even safety risks. By understanding the distinct advantages of both spigot truss connections and bolt truss connections, event planners and stage designers can make informed decisions that ensure compliance with safety standards while also enhancing the success of their events. The right stage truss system provides peace of mind, delivering a structure that is stable, professional, and ready for performance.

What is LED Wall Ground Support System?

The LED Wall Ground Support is a system used to support LED display screens. It is suitable for 500*500mm, 500*1000mm, 640*640mm, 640*480mm, 960*960mm and other specifications of LED panels.

1. Pre-Installation Preparation

• Confirm the size and design of your LED screen wall (stacking/off-ground, straight screen/curved screen)

First, you need to confirm whether your LED wall needs to be used on the ground or off the ground. Then is your LED panel a straight screen panel or a curved screen panel? We have straight LED wall ground support, off-ground straight LED wall ground support, curved LED wall ground support, and curved off-ground LED wall ground support for you to choose from.

• Check the Conditions of the Installation Site

Then you need to confirm whether the installation site is level, and and check for any uneven areas or soft ground. Different ground conditions will directly affect the stability of the LED screen wall structure. At the same time, it is also necessary to pay attention to whether there are potential risk factors such as slopes and drains at the site. For outdoor environments, weather changes must also be taken into account. By surveying the on-site conditions in advance, it can effectively reduce the installation risk and ensure the safety and stability of the structure during use.

• Whether It Is Grassland, Sand or Uneven Ground

Grassland, sandy land or soft ground usually do not have sufficient load-bearing capacity. If the LED wall ground support is installed directly on such ground, it is very easy to tilt or even complete topple. Especially in situations where the wind is strong or people are frequently active, it will bring hidden dangers to on-site safety. Therefore, under such ground conditions, you must take additional reinforcement measures to use the LED wall ground support with a larger base. On suitable surfaces (such as concrete), use chemical bolts or expansion bolts to anchor the base directly. For sites that cannot meet the safety requirements, construction should be avoided.

• Space Height and Span Limit

The spatial height refers to the clear space from the installation of the ground to the obstacles above (such as ceiling beams, suspended ceilings, lighting fixtures, fire pipes, ventilation pipes). Reserve sufficient safe operation space (it is usually recommended that the top of the screen be at least 0.8 meters below any obstacles) to facilitate panel lifting, personnel construction and post-maintenance. The span limitations refer to the distance between the sides of the screen and walls, columns or other fixtures. This determines whether the installation and transportation paths are unobstructed, and whether the screen panel can be positioned smoothly. At the same time, it is necessary to consider whether to reserve a repair channel behind the screen (it is recommended to be at least 0.8 meters wide)

• Does Your Screen Panel Have A Quick Lock Hole?

Check with your screen panel suppliers to confirm whether the panels you purchased are equipped with quick lock holes. If they do have quick lock holes, you can provide us with the panel drawing. GF-Truss can customize the quick lock for your panel. If there is no quick lock hole, you can also use screw locks.

2. Choosing the Right LED Wall Support System

• Selection of Support Structures Corresponding to Different Panels

For the straight screen panel, we have a straight LED wall ground support and off-ground LED wall ground support to choose from. For curved screen/OLED screen panel, we have curved LED wall ground support, off-ground curved LED wall ground support and flexible OLED screen panel ground support. Besides LED screen ground supports, hanging beams for LED panels are also available in GF-Truss.

• Standard Solution vs Customized Solution

Standard solution: suitable for installation scenarios of common sizes (such as 5*3m straight LED wall ground support), standard curved, and regular height. The advantages are fast delivery and universal accessories.

Customized solution: a must in the following situations:

1. Special physical size: super-large area, special-shaped cutting, straight&arc matching.

2. Extreme load or span: beyond the safety range of the standard load table.

• When Do You Need A Larger Base or A Heavier Counterweight?

When the LED wall is large and the overall height is high (more than 5m), or when it is used in outdoor and windy environments, it is usually necessary to configure a larger base, ballast or additional counterweights. This kind of structure can effectively improve the overall anti-overturning ability and reduce the risk of structural instability caused by external forces. Especially in sites with limited ground conditions or cannot be fixed, reasonable counterweight design is an important way to ensure safety.

3. Step-by-Step Installation Process

• Step 1: Placement and Horizontal Adjustment of Ground Beam and Base

According to the LED wall size, place the ground beams in sequence. Connect the adjacent ground beams together, then attach the adjustable bases to the ground beams. Use a spirit level to check the overall level of the ground beams. Make fine adjustments to the adjustable bases and ground beams by adjustable feet to compensate for uneven areas to ensure the entire foundation structure is level and stable.

• Step 2: Install the Ladder Trusses and the Crossbars

Install the first-layer ladder trusses on the base. According to the design height, install subsequent layers of ladder trusses sequentially. Connect the adjacent ladder trusses with the crossbars/telescopic crossbars to avoid structural shaking.

• Step 3: Install the LED Screen Panel

After installing the ladder trusses, then LED screen panels can be locked. First, use the panel lock on the ground beam to firmly lock the first layer of the panels. Then install the panel layer by layer from bottom to top, and pay attention to the alignment and flatness between the panels while installing.

• Step 4: Use Screw Lock/Quick Lock to Lock the Panel

Connect the quick lock/screw lock to the ladder trusses first, and then lock the panels. After the panels are in place, lock the panels in turn. During locking, it is necessary to ensure that the connector is completely in place and tightened to prevent displacement or shaking of the panel during use.

• Step 5: Overall Structure Inspection and Reinforcement

After all the installations are completed, the whole structure will be comprehensively inspected, including the ground beams, adjustable bases, ladder trusses, crossbars and panel connection points. Confirm that all connectors have been tightened, and that the structure shows no significant movement or abnormalities. According to the on-site conditions and screen size, necessary reinforcement treatment should be carried out in key parts to ensure that the system remains safe and stable in long-term use or complex environments.

4. Common Installation Mistakes to Avoid

• Ignoring Ground Conditions

Ground conditions are one of the key factors that affect the overall safety of LED screen ground support structures. If the structure is installed directly without fully assessing the levelness or stability of the ground, it is easy to cause uneven load distribution at the base. Once the ground is uneven, sloping, or prone to settling, the overall structure tends to tilt forward, which not only affects the stability of the screen, but also significantly increases the safety hazards. Therefore, the ground should be checked and treated as necessary before installation, with appropriate counterweights or additional stabilization measures applied as needed.

• Skipping Leveling and Alignment

Failing to perform precise leveling of the ground beams and bases is another common but easily overlooked problem. If the foundation is not level, the error will be continuously amplified during assembly, which will directly affect the installation accuracy of the LED screen panel and module. There may be misalignment, uneven seams or local force between the panels. Therefore, professional tools must be used for precise level adjustment during the initial installation to provide a reliable foundation for the smooth installation.

5. Post-Installation Check & Maintenance

• Safety Clearance Before Operation

A comprehensive safety confirmation is required before the system is put into use. This includes checking whether the LED screen panels are installed level and securely connected, whether any movement or displacement is present, and whether all safety locking devices are in an effective state.

• Long-term Maintenance

For long-term use or high-frequency disassembly projects, it is recommended to formulate regular inspection and maintenance plans. Focus should be placed on the base support structure, connectors and high-frequency force-bearing parts, with timely tightening, adjustment, or replacement of worn components as needed. Before each transition or repeated installation, re-leveling and structural inspection can help reduce the risk of structural fatigue, extend the service life, and ensure long-term stability and safe operation.

6. Why Choose GF-Truss

• Rich Experience in LED Wall Ground Support

GF-Truss has been deeply engaged in the field of aluminum alloy trusses and LED wall ground support for many years, and has accumulated a lot of practical project experience, covering a variety of application scenarios such as indoor exhibitions, outdoor performances, sports events, business press conferences and touring projects. GF-Truss is also a long-term partner of China's LED display manufacturers. Our design team delivers more than 2,300 customized solutions to customers every year. By participating in a wide range of LED wall projects of different sizes, heights and installation methods, we have an in-depth understanding of structural load behavior, installation process and on-site risks. This can effectively avoid potential problems and provide a more reliable support basis for your projects.

• Customized LED Wall Support Solutions and Technical Support

GF-Truss can provide flexible customized solutions for different site conditions, various screen sizes and application requirements. Our technical team will engage in the project and work closely with customers and event organizers. We conduct a comprehensive assessment of key factors such as venue dimensions, ground conditions and ceiling structure. Based on detailed on-site information, we will provide a full range of professional suggestions and feasibility plans from structure selection, size configuration, connection design.

• Suitable for A Variety of Scenarios and Applications

GF-Truss's LED wall ground support solutions are highly versatile, modular and expandable. They can widely adapt to a variety of activity scenarios and long-term application needs. For temporary events, such as music festivals, product launches and commercial exhibitions, our system has the core advantages of rapid disassembly, efficient transportation and flexible reorganization, which can adapt to tight scheduling and frequent venue changes. For long-term fixed installations, such as theaters, gymnasiums and studios, we focus on the extreme stability and durability of the structure to provide lasting and reliable support. For the most challenging high-frequency tour projects, the system is strengthened in terms of durability, standardization and rapid deployment to ensure the stability of the performance effect, while greatly reducing logistics and manpower costs.

7. Get Professional Support

Whether you are developing an initial concept, comparing solutions, or finalizing a detailed design, GF-Truss is always ready to support your project. We invite you to share your project blueprint, site parameters and creative ideas, allowing our professional structural designers to provide you with in-depth preliminary analysis and tailor-made technical advice. From the initial concept to the final implementation, we will be your reliable technical partner.

Based on the specific needs you provide, our design team will conduct detailed structural calculation and simulation analysis to develop a professional, customized structural solution, accompanied by a clear and transparent project quote. We promise that each plan has been rigorously checked for safety, and each quotation is meticulous and reasonable to ensure that you get comprehensive and accurate information before making a decision.

Start your exclusive project consultation now! You can contact us through WhatsApp and email to get free technical solutions and accurate quotations. 

What Is an LED Wall Ground Support System?

An LED wall ground support system is a structure that holds LED panels securely in place. It keeps the LED panels stable and safe when in use. These systems are important for display applications. The main job of an LED wall ground support system is to provide support. This prevents the panels from wobbling or tipping over. They work for both permanent installations.

These systems have features. Some important parts include:

* Bases for stability.

* Ground Beams to lock the first layer of the panels.

* Ladder Trusses for support.

* Crossbars to connect ladder trusses.

* Screw Locks for secure assembly.

* Diagonal Braces to support and reinforce the ladder truss.

Optional components include:

* Weights to prevent the screen wall from tipping over.

* Working Platforms for high-altitude installation.

Types of LED Wall Support Structures

LED wall support structures can be categorized based on screen shape and installation method. In real-life applications, they are often divided into straight screen panel systems, curved screen panel systems and customized solutions. This helps customers choose the solution that best meets their needs.

The flexibility of these structures makes them useful. They can adjust to fit panel sizes and configurations. This makes them a good choice for event planners.

• Straight LED Wall Support Systems

Straight LED wall ground support systems are designed for straight LED panels. These systems are suitable for conferences, exhibitions, corporate events and stage backdrops where a clean and uniform visual effect is needed.

There are two installation methods:

* Ground-supported or stacking systems:

These structures are installed directly on the ground. They provide load-bearing capacity and high stability. They are ideal for LED walls and applications where safety is a priority.

* Off-ground systems:

In this setup, the LED wall is elevated above the ground. This creates space underneath for equipment, stage design or visual layering. This design improves the presentation and viewing experience.

• Curved LED Wall Support Systems

Curved LED wall support systems are designed for arc or flexible LED displays. These systems require a structural approach compared to straight screen systems. Curved installations need angle control between panels and consistent alignment across the structure.

These systems can be divided into:

* Ground-supported or stacking systems:

Designed to provide stable support for large curved LED walls. They ensure angle positioning and overall structural integrity.

* Off-ground curved systems:

Elevating a LED wall provides important structural and functional advantages. It creates space beneath the screen for equipment integration and cable management.

• Custom-Built Solutions

Customized solutions are developed to meet project requirements. These solutions are suitable for large-scale installations, complex designs or projects with non-standard structural conditions. For example reinforced or extended LED wall support structures can be designed for displays. Customized systems can be developed according to, on-site installation requirements.

Designing LED Wall Support Structures

LED Wall Support Structures must be stable, safe and compatible with LED panel systems. To achieve this factors such as the size and weight of LED panels, load and installation environment must be considered. The assembly method is also crucial. The structures accuracy and load distribution are vital to ensure the reliability of the LED display system. This is especially important for events or stage installations.

When designing engineers usually think about the screen size, weight of panels and structure configuration. With these details they can decide on the ground support structure, connection methods and reinforcement components. Other factors like wind load, installation height and whether the display is straight or curved also affect the solution.

Some key things to consider are:

* The structure must be able to support the weight of LED panels

* Stability is critical for installations in windy or uneven areas.

* Easy assembly is also important as it can save time for events and exhibitions.

* Modular designs help the support system adapt to venue sizes and configurations.

They also ensure compatibility with stage elements, like trusses, lighting and sound systems.

To develop an optimized and safe LED wall support solution, customers are usually required to provide specific project information:

Applications of LED Wall Ground Support Systems

1. Corporate Events

In corporate conferences, product launches and brand presentations, LED wall ground support systems provide a stable and professional display solution. They support LED screens that show impactful visuals. This helps companies present data, videos and branding content effectively. Their modular design allows setup and customization to fit different venue sizes.

2. XR Stages

For reality (XR) productions, ground support systems are critical. They help build environments. They ensure alignment and stability of LED walls. This is essential, for real-time rendering and camera tracking. A reliable support structure helps maintain visuals. This enhances the realism of virtual scenes.

3. Virtual Studios

In virtual studios, LED walls are used as dynamic backgrounds for film, television and live streaming. Ground support systems provide the strength and flexibility. They support high-resolution screens, enabling creators to switch environments instantly without physical set changes.

4. Exhibitions and Trade Shows

At exhibitions and trade shows, LED walls attract attention and engage visitors. Ground support systems allow for creative screen configurations, including curved or large-scale displays, helping your booths stand out in competitive environments.

Why Choose an LED Wall Ground Support System?

• High Stability for Screens

With solid bases, ladder trusses, and diagonal braces, the system ensures excellent stability even for any kind of LED walls.

This is especially important for outdoor events or high-traffic environments, where safety and reliability cannot be compromised.

• Faster Installation for Events

Time is critical in event setups. LED Ground Support Systems are made of parts that can be put together easily so special tools are needed to assemble it. It is easy to connect the parts and take them apart which saves us time and makes things more efficient.

For companies that rent out equipment and people who put on touring events this means they can get things done faster. It costs them less money.

• Flexible Configuration

Every project is different. Our ground support systems are designed to adapt to various layouts, whether you are building a straight LED wall, a curved LED wall, or any unique structure.

They can be configured for different heights, widths, and shapes, allowing event planners and engineers to achieve creative visual designs without structural limitations.

• Customizable for Your LED Panels

One of the most important issues in any LED wall installation is compatibility. Including their sizes, connection methods, and installation specifics, a dependable ground support system must suit the particular properties of the LED panels being used.

The structure can be configured to suit different systems, whether the panels use quick-lock mechanisms or screw-lock connections. With the right specifications, each setup can be aligned properly, ensuring a secure and consistent installation.

Installation and Safety

A safe and dependable LED wall support structure hinges on proper installation. Following a straightforward, step-by-step process is key to achieving both efficiency and structural integrity:

• Attach the bases to the ground beams
• Install the ladder trusses onto the bases
• Use crossbars to connect adjacent ladder trusses
• Secure the ladder trusses and fix the LED panels with quick/screw locks

First and foremost, ensure all connections are snug. This entails verifying that every bolt and locking mechanism is fully tightened to prevent loosening during operation.

Secondly, confirm that the weight distribution is even. Uneven weight distribution can lead to issues, as certain areas will endure excessive stress.

Third, use weights or special supports to keep everything stable when the weather changes.

Equally important is ongoing safety management. Regular inspections of critical components can help identify potential issues early and ensure consistent performance throughout the event. Working with trained personnel and following standardized procedures will further reduce risks.

Learn more: How to Install LED Wall Ground Supports? →

FAQ

Q: Is GF-Truss LED ground support system really that different from other systems?

A: Yes. The difference lies in the system's adaptability, its design, and the materials used. High-strength aluminium and a modular architecture help GF-Truss distribute weight more evenly than many conventional systems. This makes it appropriate for curved displays as well as for straight LED walls.

The system is adaptable, regardless of whether you use quick lock or screw lock. It can be tailored to your specific LED panels, accommodating different hole spacing and connection methods. Furthermore, it allows for mixed configurations, meaning you can use 500×500mm and 500×1000mm panels together.

Q: Will this work for different LED panels?

A: Yes. It can be modified to fit several locking systems, including screw-lock and quick-lock types. We can adjust the configuration depending on your panel drawings and technical specifications. This guarantees a good fit, correct alignment, and safe installation.

Q: How do you prevent the LED wall from tipping over?

A: Stability depends on how the structure performs as a whole. It is achieved through a combination of base design, counterweight, and reinforcement elements such as diagonal bracing.

Load distribution and connection integrity are equally important. When these factors are properly addressed, the structure remains stable and reliable under normal operating conditions.

Q: Is the system suitable for touring or frequent transport?

A: Yes. Lightweight aluminum makes up the whole structure, which allows for easier handling without losing sturdiness. Its modular form allows for quick assembling and dismantling.

These characteristics make it perfect for rental use where constant movement and configuration are needed as well as for touring applications.

Ready to customize a reliable LED Wall Support?

Whether you are planning a concert, exhibition, or XR production, choosing the right support system can significantly improve efficiency and safety.

✔ Compatible with various LED panel sizes

✔ High-strength aluminum alloy structure

✔ Custom solutions for complex projects

for More Details:

• Straight LED Wall Ground Support
• Off-ground Straight LED Wall Ground Support
• Curved LED Wall Ground Support
• Off-ground Curved LED Wall Ground Support

If you are new to aluminum truss or stage structure industry, you will often hear about EN 1090-3 certification. You can think of it as the European rulebook that instructs manufacturers to construct aluminum load-bearing trusses safely and uniformly. It covers the things that actually matter, such as real structural strength, weld quality, and material traceability.

Why EN 1090-3 Certification Matters

Many beginners assume all aluminum trusses are more or less the same. Once you work on real projects, you start noticing that manufacturers who follow EN 1090-3 usually deliver more predictable results than those who rely only on experience or habit. In the aluminum industry, where strength-to-weight ratio and weld integrity directly influence safety, this certification becomes one of the most important factors buyers look at.

What EN 1090-3 Actually Regulates

EN 1090-3 provides clear rules for producing aluminum load-bearing components. It regulates material traceability, welding procedures, operator qualifications, and structural conformity.Unlike general quality labels that sound nice but do not address critical issues, EN 1090-3 focuses on the factors that appear most likely to affect real-world safety. These include load capacity, weld penetration, and deformation control.

For trusses and stage systems, compliance usually means each beam offers more consistent mechanical properties instead of depending on variable workshop experience.

Why Non-Certified Manufacturers Carry More Risk

Aluminum does not behave like steel, especially during welding. Aluminum reacts quickly to heat, so improper handling during fabrication can trigger cracking, warping, or a noticeable drop in its load capacity. When a project is not produced under an audited system such as EN 1090-3, it becomes difficult for a buyer to know if the welders followed the correct procedures, checked the material batches, or carried out the required structural tests.

For large-span truss structures, or truss systems that require high load-bearing capacity, any uncertainty in these steps can quickly become a real safety concern. Working with EN 1090-3-certified products gives project owners a clearer picture of how their components were made and adds a safeguard for the people who ultimately use the structure.

Key Advantages of EN 1090-3

• Reliable Welding Quality

Welders working under this standard operate with approved methods and documented quality controls. As a result, the weld seams on stage, trusses, and truss systems maintain stable strength and predictable performance.

• Trustworthy Load Ratings

Each aluminum component produced within the EN 1090-3 framework is backed by traceable structural data and load calculations. This documentation enables engineers confirm that the structure will behave as expected once it is installed on site.

• Consistent Material Selection

The standard specifies acceptable aluminum alloys and grades. This approach prevents any unwanted material substitution and helps keep the mechanical properties more consistent in situations where safety is a major concern.

• Factory Production Control (FPC)

Factory production control requires ongoing quality management for cutting, welding, machining, and assembly. It also supports more stable results from one production batch to another, reducing unexpected variations.

• CE Marking for EU Market Access

EN 1090-3 is one of the required conditions for CE marking in the EU. Without this authorization, it is not legal to supply structural aluminum products on most European markets.

EN 1090-3 Compared to Non-Certified Production

When you compare certified and non-certified products side by side, several differences become noticeable. Welds tend to be more consistent, load ratings are documented, and material quality is traceable. The overall structure feels more predictable, which makes installation and long-term use more reliable.

How Buyers Should Decide

For buyers or procurement teams, it is wise to prioritize manufacturers with EN 1090-3 certification, qualified welders, and complete factory production control documentation. This approach leads to safer installations and more reliable performance. For large events, suspended loads, or public venues, choosing EN 1090-3 aluminum structures is both practical and cost-effective. It helps protect safety and long-term investment.

1. Why Yankee Coating Systems Increasingly Rely on High-Performance PVOH

With the upgrading of global tissue paper consumption, the market's comprehensive requirements for the softness, strength, bulkiness, and absorbency of tissues are constantly increasing. To achieve this balance of performance, traditional DCT (Dry Crepe Technology) is gradually becoming insufficient to meet the demands, and structured forming technologies such as TAD, NTT, eTAD, and QRT are widely used.

The advantages of PVOH are:

Good water solubility and high system compatibility

Tuned molecular structure and high application flexibility

Predictable impact on peel force and wrinkling behavior

This makes it a "structural material" in the high-end tissue paper Yankee coating system, rather than a simple additive.

2. The Influence of PVOH Viscosity and Concentration on Coating Rheological Behavior

At the same concentration, the viscosity of solutions with different molecular weights of PVOH varies significantly. However, in actual coating, the extended viscosity behavior as a function of concentration is more important.

Low-viscosity PVOH (Kuraray Poval 22-88): Easy to handle and sprayable, but with limited support under high-load peeling.

Medium-high viscosity PVOH (Kuraray Poval 22-88): Achieves a good balance between coating integrity and operational stability.

Ultra-high molecular weight PVOH (Kuraray Poval 200-88 KX): Forms a highly ductile coating network even at lower concentrations, contributing to improved "effective adhesion time" on Yankee surfaces.

3. Performance Focus Due to Differences in Hydrolysis Degree

Besides molecular weight, the degree of hydrolysis also determines the application boundaries of PVOH:

88% Hydrolysis Degree: Good water solubility, suitable for coating systems with large dynamic changes, and is the mainstream choice for current structured tissues.

99% Hydrolysis Degree (Elvanol 90-50): Dense film formation, stronger water resistance, suitable for paper machines requiring longer coating life or high humidity operating conditions.

In practical formulations, the adhesion and peelability of coatings are often precisely controlled by blending PVOHs with different degrees of hydrolysis.

4. PVOH Selection Approach Based on Application Objectives

When selecting PVOH for the Yankee coating system, the following factors should be given priority consideration:

Paper machine speed and Yankee surface temperature

The balance between the softness and strength of the target paper

The synergistic effect of the overall coating chemical system

Website: www.elephchem.com

Whatsapp: (+)86 13851435272

E-mail: admin@elephchem.com

With increasingly stringent environmental regulations and rising industrial demands for high-performance adhesives, water-based adhesives are gradually replacing traditional solvent-based systems. Among these, vinyl acetate-ethylene copolymer (VAE) emulsions have become a crucial foundational material in the adhesive industry due to their excellent bonding properties, good flexibility, and environmentally friendly characteristics.

Among numerous VAE products, the VINNAPAS series emulsions, with their stable performance and wide range of applications, have found widespread use in industries such as paper packaging, woodworking adhesives, textile lamination, and automotive interiors.

1. VAE Emulsions: A Key Polymer Base Material in the Adhesive Industry

VAE emulsions are copolymers formed from vinyl acetate (VAc) and ethylene (E) through emulsion polymerization. This copolymer structure combines the advantages of both monomers:

* Vinyl acetate provides good adhesion and rigidity.

* Ethylene imparts flexibility and water resistance to the material.

* By adjusting the ethylene content, polymers with different glass transition temperatures (Tg) can be obtained, thus meeting the needs of various adhesive applications.

VAE emulsions offer the following significant advantages: Excellent adhesion properties, good flexibility, faster curing speed, good heat resistance, and low VOCs, making them more environmentally friendly. Because of these characteristics, VAE emulsions have become one of the most important base materials in water-based adhesive formulations.

2. Analysis of Four Typical VINNAPAS Models

VINNAPAS EP 706K — General Purpose VAE Emulsion

EP 706K is a classic general purpose VAE emulsion with stable viscosity and good application properties.

Key Features:

Excellent application properties

Good wet tack

Stable bond strength

Suitable for a variety of adhesive formulations

Typical Applications:

Paper packaging adhesives

Woodworking adhesives

Textile bonding adhesives

Due to its balanced performance, EP 706K is often used as a base emulsion in adhesive formulations.

VINNAPAS EP 707K — Fast-Curing Emulsion

Compared to EP 706K, EP 707K has lower viscosity and a faster curing speed while maintaining good flexibility.

Key Advantages:

Low viscosity

Fast curing speed

High elongation at break

Excellent water resistance

Applications:

Paper processing

Wood processing

Textile bonding

This emulsion is particularly suitable for industrial adhesive applications requiring rapid production cycles.

VINNAPAS EP 708 – High Viscosity, High-Performance Emulsion

EP 708 is a high-viscosity version of EP 706K, offering better thickening response.

Product Features:

High viscosity system

Good thickening response to plasticizers or solvents

Good bond strength

Main Applications:

Textile bonding adhesives

Woodworking flat bonding adhesives

Composite adhesives

In applications requiring higher viscosity systems, EP 708 significantly improves formulation stability.

VINNAPAS EP 712 – Water-Resistant VAE Emulsion

EP 712 exhibits excellent water resistance and is widely used in textile bonding.

Key Advantages:

Good water resistance

Stable adhesion

Good workability

Typical Applications:

Textile composites

Fabric bonding

Sponge composites

This product is suitable for applications requiring high water resistance.

3 NEXIVA 210: A Complementary Solution to Redispersible Latex Powder

In addition to liquid emulsions, the document also mentions an important product—NEXIVA 210 redispersible latex powder.

This powdered polymer can be redispersed to form an emulsion upon addition of water, offering the following advantages:

Avoids freezing issues during low-temperature transportation

More stable storage

Reduces the risk of microbial contamination

Easier application

NEXIVA 210 is particularly suitable for EPI two-component wood adhesives (D4 grade water-resistant adhesives), widely used in the furniture manufacturing and wood structure processing industries.

Website: www.elephchem.com

whatsapp: (+)86 13851435272

E-mail: admin@elephchem.com

1. What is PVB Laminated Glass?

Laminated glass, a highly secure glass product, is made by embedding a special interlayer between two layers of glass and then pressing them together using an autoclave. PVB interlayers are primarily used in laminated glass. Some types of interlayers are made of other materials, such as EVA (ethylene vinyl acetate). PVB interlayers offer advantages in adhesion to glass, penetration resistance, and impact resistance.

Due to its shatterproof properties, PVB interlayers for laminated glass are widely used in areas requiring security and anti-theft features, such as automotive windshields, side windows, and architectural glass. In the automotive industry of almost all countries, including the United States, Europe, and Japan, laminated glass is mandatory for windshields. With the increasing demand for bright, open spaces, the role of glass in comfort, design, safety, and security is constantly expanding. PVB interlayers, as a technology that can enhance the possibilities of glass, are attracting increasing attention.

2. What is PVB Interlayer for Laminated Glass?

Our PVB interlayer for laminated glass is widely used globally and offers the following benefits:

High Transparency: The PolyVinyl Butyral Film(PVB film) has excellent optical transparency, allowing laminated glass to maintain a clear visual effect. This is particularly important for applications such as automotive windshields, building facades, and high-end display glass.

Safety and Protection: The PVB interlayer has excellent impact absorption capabilities. When the glass is impacted, the PVB film can absorb some of the impact energy, thereby reducing the danger of glass breakage. Furthermore, broken glass remains bound together by the PVB film, preventing dangerous shards from flying everywhere.

Penetration Resistance: PVB laminated glass effectively blocks external forces from penetrating when subjected to external impacts or vandalism. Compared to ordinary glass, its protective performance is significantly improved, making it widely used in banks, airports, and high-security buildings.

UV Protection: The PVB interlayer blocks approximately 99% of UV rays, effectively protecting indoor furniture, flooring, and decorative materials from fading due to long-term UV exposure. This property also protects passengers' skin in automotive glass.

Thermal Insulation: The laminated structure reduces heat transfer, improving comfort inside the home or vehicle. In modern energy-efficient buildings, the combination of laminated glass and Low-E glass further enhances energy efficiency.

Sound Insulation: PVB film possesses damping properties, absorbing and attenuating sound waves, giving laminated glass a significant advantage in noise reduction. This is a major reason for its increasing popularity in urban buildings and high-end residences.

Design Flexibility: The PVB interlayer can achieve diverse visual effects through color or gradient designs. Examples include colored laminated glass and gradient glass, widely used in building curtain walls, interior decoration, and automotive glass.

HUD Display Support: In the automotive industry, PVB laminated glass can be used in conjunction with HUD (Head-Up Display) systems, allowing drivers to directly see navigation, speed, and other information on the windshield, improving driving safety.

3. Main Application Areas of Polyvinyl Butyral Resin (PVB) Laminated Glass

Automotive Industry

In the automotive industries of almost all countries, including the United States, Europe, and Japan, PVB laminated structures are the standard for automotive windshields.

Its main advantages include:

Improved driving safety

Prevention of glass shards from scattering

Support for HUD display technology

Provision of sound insulation and UV protection

With the development of intelligent vehicles, the role of PVB interlayer in automotive glass is becoming increasingly important.

Construction Industry

In the construction field, PVB laminated glass is commonly used for:

Building curtain walls

Skylights

Balcony railings

Stair railings

Explosion-proof and bulletproof glass

It not only enhances building safety but also improves sound insulation and energy efficiency.

Specialty Safety Glass

In scenarios with extremely high safety requirements, such as:

Bank counter glass

Museum display cases

Airport safety glass

Bulletproof glass

The PVB laminated structure effectively improves the protection level.

Website: www.elephchem.com

Whatsapp: (+)86 13851435272

E-mail: admin@elephchem.com

VAE polymer emulsion is a copolymer emulsion of vinyl acetate and ethylene. Due to the introduction of the comonomer ethylene, its internal plasticity is significantly improved. Therefore, VAE polymer emulsion has good film-forming properties, low film-forming temperature, soft and strong coating, and wear resistance, thus significantly improving the water resistance, alkali resistance, weather resistance and stain resistance of the coating. Choosing a VAE Emulsion (Vinyl Acetate–ethylene Copolymer Emulsion) with a lower viscosity can accommodate a large amount of filler while maintaining excellent adhesion to various substrates. This unique property makes it very suitable for adhesive materials where filler is used to control the bonding strength and cost.

1. Preparation of Waterproof Coatings

According to the technical requirements of the construction site, appropriate additives such as stabilizers, dispersants, and defoamers are added to the VAE emulsion. At the same time, some powders such as cement, calcium carbonate, and quartz powder are selected to design a variety of waterproof coatings that meet various technical requirements.

1.1 JS Waterproof Coating

Two-component water-based JS waterproof coatings, primarily composed of polymer emulsion and cement, come in two types: one uses cement entirely as filler, and the other uses a mixture of cement and other powders as filler. Both types of JS waterproof coatings form their films mainly through cement hydration and polymer particle dehydration and fusion. However, due to the difference in fillers, their film properties differ. Designing a formulation that meets both standards and engineering requirements generally uses the polymer-to-cement ratio (P/C) as the main parameter. Based on years of experimental experience, this paper discusses the formulation using aluminate cement and VAE emulsion as an example, using data and charts. Figure 1 shows the elongation at break of the coating with cement as the sole filler, as a function of P/C; Figure 2 shows the elongation at break of the coating with a mixture of cement and quartz powder as filler, as a function of P/C. Both coatings meet the tensile strength requirements of JC/T 894—2001 standard.

According to JC/T 894—2001, the range of design parameter P/C values ​​that meet the performance index requirements of Type I and Type II JS waterproof coatings can be found in Figures 1 and 2, summarized in Table 1.

For JS waterproof coatings made entirely of cement, P/C can be considered as a design parameter. However, for JS waterproof coatings made by mixing cement and other fillers, in addition to P/C, the design parameters should also consider the polymer-to-powder ratio (P/F, the ratio of polymer mass to the total mass of powder) and the cement-to-powder ratio (C/F, the ratio of cement mass to the mass of other powders). The effects of P/F and C/F on the elongation at break of waterproof coatings with partial cement filler are shown in Figures 3 and 4, respectively.

Comparing Figures 3 and 4 with Figure 2, the effects of P/F and C/F on the elongation at break are clearly visible. Increasing the P/F value increases the elongation, while increasing the C/F value decreases the elongation. The abrupt change points on the P/F, C/F, and P/C curves are basically corresponding. Therefore, when designing JS waterproof coatings, it is necessary to comprehensively consider these parameters to obtain the optimal mixing ratio. In engineering applications, the following aspects need attention:

(1) When treating fine cracks and reinforcing layers, adding one layer of fiberglass cloth to the coating film can greatly improve the tensile strength of the film. Experiments show that, under the same raw material parameters, adding one layer of fiberglass cloth can increase the tensile strength of the coating film by 471%, while reducing the elongation at break by 99%.

(2) When it is necessary to increase the elongation at break of the coating film, an appropriate amount of plasticizer can be added, but this will result in a loss of tensile strength. For example, using the same formula, adding 12% plasticizer increases the elongation at break of the coating film by 93%, but reduces the tensile strength by 69%.

(3) When using cement to prepare JS waterproof coatings, adjusting the formula with P/C generally follows that as P/C increases, the tensile strength of the coating film decreases, while the elongation at break increases. However, this pattern applies within a certain P/C value range, and the P/C value range varies among different types of cement. Therefore, it needs to be determined through testing in application.

(4) The situation regarding the preparation of JS waterproof coatings using mixed powders is relatively complex. Analysis of the data in Table 2 shows that when P/F is the same, the tensile strength and elongation at break of the coating film are not significantly different; however, when P/C is the same but P/F is different, the coating film performance also differs.

(5) When different types of cement are used with VAE emulsion to prepare waterproof coatings, even with the same mixing parameters, the differences in coating film performance are still significant. This should be given particular attention in engineering applications to avoid unnecessary losses.

1.2 Polymer Emulsion Waterproof Coatings

Using VAE emulsion as the main raw material, single-component water-emulsion type waterproof coatings can also be prepared. If colored pigments are added, the coating film, in addition to its waterproof function, also has the function of beautifying the environment. Formulation design and performance tests show that using VAE emulsion in combination with other emulsions effectively improves the tensile strength and elongation at break of the coating film, achieving better results than using VAE emulsion alone (such as VINAVIL EVA 2606L) .

with the same polymer-to-powder ratio (P/F), the composite emulsion waterproof coating exhibits superior performance. All indicators are more reasonable and meet the requirements of JC/T 864—2000 "Polymer Emulsion Waterproof Coatings for Buildings" standard. It should be noted that only one formulation ratio should be used in various projects; instead, the types and quantities of emulsion and powder should be adjusted according to the actual application areas to ensure the waterproof coating performance meets the requirements of different projects.

2. Preparation of Mortar Waterproofing Agents

Rigid waterproofing started with the five-layer plastering method, gradually progressing to the use of admixtures to modify cement mortar or concrete, and now to polymer-modified cement mortar. Compared with ordinary cement mortar, polymer-modified cement mortar has many superior properties, including strong adhesion, high elasticity, impact resistance, good waterproofing, and improved chemical resistance. The high bonding strength of VAE emulsion makes it very suitable for use in modified cement mortar.

When preparing waterproofing agents for cement mortar using VAE emulsion as the main material, it is important to note that: due to the large amount of calcium and magnesium ions in cement absorbing water from the emulsion, and the mechanical shearing action during mixing, the polymer emulsion may break down. To improve the stability of the emulsion, an appropriate amount of stabilizer should be added.

Experimental materials: self-made VAE waterproofing agent; cement, P·O 42.5 grade; sand, ISO standard sand.

Experimental mix ratio: m(cement):m(sand):m(VAE waterproofing agent) = 1:3:(0.47~0.52).

Experimental items: conducted according to JC/T 474—1999 "Waterproofing Agents for Mortar and Concrete", with particular attention to the change in water absorption over 48 hours (see Figure 5). The dosage of waterproofing agent in the mortar is expressed as the polymer-cement ratio P/C of the mortar.

As shown in Figure 5, the water absorption of VAE mortar decreases rapidly when P/C = 0.15~0.19, and then the rate of decrease slows down as the P/C value increases.

Performance testing was conducted on VAE mortar with a P/C value of 0.2, and the results are shown in Table 4.

Characteristics of VAE waterproofing agent applied to cement (mortar):

(1) Water reduction rate can reach over 30%, thus increasing mortar density, reducing and uniformly distributing internal voids, and increasing compressive strength.

(2) Significantly reduced water absorption and excellent waterproofing properties, making it very suitable for constructing water storage tanks, underground projects, roofs, and other waterproofing facilities.

(3) When VAE waterproofing agent is mixed with mortar, the workability of the mortar is good, the water retention is improved, and bleeding is effectively prevented.

(4) Cement (mortar) mixed with VAE waterproofing agent has high bonding strength and can be used as a binder for various building materials.

(5) In engineering practice, cement (mortar) modified with VAE waterproofing agent exhibits excellent anti-seepage and waterproofing performance. Whether used as a waterproofing finishing material on the water-facing or backwater side of water-retaining structures, or for repairing leaking rigid waterproofing layers, VAE waterproofing agent has been rapidly promoted and applied due to its suitability for construction on damp substrates.

3 Conclusion

Years of research and application have proven that VAE emulsion (such as VINNAPAS EP 4600) used in polymer-modified cement (mortar) products exhibits unique properties, possessing both high bonding strength and tensile strength, as well as good elongation. This performance is crucial for polymer-modified cement (mortar) products. VAE emulsion-modified cement (mortar) has broad practical value in concrete repair, protection, waterproofing, corrosion prevention, and bonding.

Website: www.elephchem.com

Whatsapp: (+)86 13851435272

E-mail: admin@elephchem.com

SoarnoL DC3203RB combines the high gas barrier properties, oil resistance, and transparency of ethylene alcohol with the moisture resistance and melt extrusion processability of ethylene. Furthermore, since Soarnol is composed only of carbon, oxygen, and hydrogen, it does not produce toxic gases when burned, and the heat generated during combustion is only half that of polyethylene, making it a low-load raw material.

SoarnoL DC3203RB (EVOH EW-3201) Performance Characteristics:

Excellent Gas Barrier Properties: It provides excellent barrier properties against gases such as oxygen and carbon dioxide, effectively preventing food and pharmaceuticals from spoiling or developing off-flavors due to oxygen penetration, thus extending the product's shelf life. For example, in food packaging, packaging containing this material can extend the shelf life and aroma retention of food by months or even years without the addition of preservatives.

Excellent processing performance: Combining the processability of ethylene polymers with the barrier properties of vinyl alcohol polymers, it can be thermoformed using traditional polyolefin processing equipment, such as extrusion, blow molding, and injection molding, easily producing various packaging containers, films, and other products.

Excellent oil and organic solvent resistance: Exhibits strong stability when in contact with oils and various organic solvents, with minimal weight gain and is not easily dissolved or swollen, making it suitable for packaging oily foods, cosmetics, pharmaceuticals, and products containing chemical solvents.

High mechanical strength and good abrasion resistance: Possesses high tensile strength, flexural strength, and impact strength, along with high surface hardness and good abrasion resistance. Packaging materials made from this material are not easily damaged during transportation, storage, and use, protecting the integrity of the contents.

Good transparency and gloss: Film products have high gloss and low haze, and are highly transparent, allowing the product inside the packaging to be clearly seen, enhancing the product's display effect and attracting consumers.

Good thermal stability: It is one of the most thermally stable resins among all commercially available strong barrier resins. Waste generated during processing can be recycled and reused, reducing production costs and meeting environmental protection requirements.

Meets environmental protection requirements: It is non-toxic and odorless, and will not produce harmful substances upon direct contact with food, medicine, etc., making it safe for human health and the environment. Furthermore, multi-layer packaging materials containing Soarnol EVOH (Ethylene-VinylAlcohol Copolymer) can be recycled under certain conditions, helping to reduce waste pollution.

When used as a high-barrier material, EVOH is typically employed in a multi-layer composite structure. Typical structures include:

Low-density polyethylene/ethylene-vinyl alcohol copolymer/low-density polyethylene

PP/AD/EVOH/AD/LDPE

PP/PA/EVOH/PA/AD/PE

PE/AD/PA/EVOH/PA/AD/PE

PA/EVOH/PA/AD/PE

In these structures, AD represents the adhesive. The multi-layer composite structure fully utilizes the properties of each material, improving the water resistance of EVOH and resulting in a high-barrier material with excellent overall performance. Most of the above structures are used in flexible packaging. Composite resins such as PP, PE, and PA, due to their good toughness but poor rigidity, are difficult to cut, limiting their application in rigid packaging, especially in online filling products. Impact-resistant high-barrier polystyrene (HIPS) possesses good rigidity, excellent molding performance, and is easy to punch, making it suitable for rigid packaging materials.

However, due to the poor compatibility between EVOH resin and HIPS resin, and the significant difference in their rheological rates, key issues affecting the performance and use of the composite material include the adhesion strength between the substrate and EVOH, the tensile properties of EVOH during secondary molding, and the uniformity of EVOH layer distribution during calendering of composite sheets. These are also challenges that need to be addressed in the production of this type of composite material. Domestic production has been difficult, necessitating imports, which significantly restricts cost and delivery time. Therefore, the development of high-barrier EVOH composite materials suitable for rigid packaging, especially for online filling, is particularly urgent.

Website: www.elephchem.com

whatsapp: (+)86 13851435272

E-mail: admin@elephchem.com

1. Overview of PVB in Laminated Glass

PVB (polyvinyl butyral resin), is a high-performance resin material widely used in the production of laminated glass. PVB is produced through an alcoholysis and acetalization reaction, possessing excellent adhesion, transparency, and elasticity. It bonds tightly to glass, giving laminated glass superior safety, sound insulation, and UV resistance.

2. Production Process of PVB in Laminated Glass

The production process of laminated glass mainly includes the following steps:

Glass Cleaning: First, clean the two or more pieces of glass to be laminated to ensure the glass surface is clean and flawless.

PolyVinyl Butyral Film(PVB film) Processing: Cut PVB film to the appropriate size and color according to the required dimensions and color of the laminated glass.

Lamination Processing: Place the PVB film between two or more pieces of glass and undergo a high-temperature, high-pressure lamination process to bond the PVB film tightly to the glass, forming laminated glass.

Inspection and Packaging: Quality inspection is performed on the produced laminated glass. Qualified products are packaged for transportation and sale.

3. Advantages and Applications of PVB Laminated Glass

Laminated glass, due to the use of China PVB film, has the following advantages:

• High Safety: When laminated glass breaks due to impact, fragments adhere to the PVB film, reducing injury and improving safety.
• Good Sound Insulation: The PVB film has excellent sound insulation properties, making laminated glass perform exceptionally well in noise reduction, especially suitable for applications requiring noise reduction.
• UV Protection: The PVB film effectively blocks most ultraviolet rays, protecting indoor items from UV damage and extending their lifespan.

Laminated PVB glass is widely used in the following fields:

• Construction Industry: Due to its safety, sound insulation, and UV protection properties, laminated glass is widely used in building curtain walls, sunrooms, doors and windows, stairs, railings, etc.
• Automotive Industry: Laminated glass is commonly used for automobile windshields to improve the safety and comfort of drivers and passengers.
• Transportation Facilities: Laminated glass is commonly used in transportation facilities such as train stations, airports, and bus stops for applications like glass curtain walls and sound barriers.
• Security: Laminated glass can be used in bulletproof, explosion-proof, and burglarproof security systems to protect personal safety and property.

4. Classification and Selection of PVB Laminated Glass

Based on the thickness, color, and performance of the PVB film, laminated glass can be classified as follows:

Ordinary Laminated Glass: Uses ordinary transparent PVB film, suitable for general construction, furniture, and other fields.

Colored Laminated Glass: Uses colored PVB film, offering a wide range of color choices, suitable for decorative applications.

Soundproof Laminated Glass: Uses PVB film with special soundproofing properties, suitable for environments requiring noise reduction.

When selecting laminated glass, consider the thickness, color, and performance of the PVB film based on your actual needs and budget to choose the appropriate product.

5. Installation and Maintenance of Laminated PVB Glass

To ensure the performance and lifespan of laminated glass, the following installation and maintenance precautions should be taken:

Installation: Laminated glass should be installed by professionals to ensure a secure installation, good sealing performance, and to prevent water and air leakage.

Cleaning: Use a neutral detergent to clean laminated glass. Avoid using acidic, alkaline, or abrasive cleaners to prevent damage to the PVB film and glass surface. Use a soft cloth or sponge for cleaning; avoid using hard brushes or metal brushes.

Sun Protection: Although laminated glass has some UV resistance, prolonged exposure to strong sunlight may cause the PVB film to age and discolor. Therefore, in locations where laminated glass is used, consider implementing sunshades or shading measures to extend its lifespan.

Moisture Prevention: Laminated glass is susceptible to moisture in humid environments, affecting its sealing performance and transparency. Therefore, when using laminated glass in high-humidity environments, pay attention to ventilation and moisture prevention.

6. Development Prospects of PVB Laminated Glass

With continuous technological advancements and rising demands for quality of life, laminated glass will be increasingly widely used in construction, transportation, and security. The future development trends of PVB laminated glass mainly focus on the following aspects:

Enhanced Functionality: Developing PVB films with multiple functions such as higher safety performance, better sound insulation, and stronger UV resistance to meet the needs of various scenarios.

In summary, as a high-performance resin material, PVB laminated glass has broad application prospects in construction, transportation, and security due to its excellent safety performance, sound insulation, and UV resistance. When selecting and using laminated glass, the appropriate PVB film type should be chosen according to actual needs to ensure the effectiveness and lifespan of the laminated glass.

Website: www.elephchem.com

Whatsapp: (+)86 13851435272

E-mail: admin@elephchem.com