11 Things You Need To Know About EVA Glass Lamination Vacuum Bags

EVA Glass Lamination Silicone Vacuum Bags

Table of Contents

As the author of this blog, I was initially quite overwhelmed when I first encountered the concept of “EVA Glass Lamination Vacuum Bags.”

What exactly is EVA? What does glass lamination involve? And what are these vacuum bags all about?

The connection between them seemed rather elusive to me at that time.

When you are reading this article, chances are you’re facing the same questions I once had.

If you are curious about EVA glass lamination and eager to learn more about vacuum laminating bags, you’ve come to the right place.

I’m going to show you 11 things that are related to “EVA”, “Glass Lamination”, and “Vacuum Bags”. We will explore their definitions in a step-by-step manner, gradually placing the spotlight on today’s featured product: “Silicon Vacuum Bags“.

Let’s delve into the fascinating world of EVA film laminating bags.

What Are EVA Glass Lamination Vacuum Bags?

EVA glass lamination vacuum bags, also called silicon vacuum bags, are specialized bags used in the production of laminated safety glass.

EVA glass lamination vacuum bags

Vacuum bags play a crucial role in the EVA glass lamination process. When the layers of glass and EVA films are placed inside a vacuum bag, the air is removed from the bag, creating a vacuum environment. This vacuum helps to ensure that the glass panels and EVA interlayers are pressed together tightly and evenly during the lamination process.

The vacuum also helps to remove any air bubbles or impurities that may be trapped between the layers, resulting in a high-quality and visually appealing laminated glass product. Without the use of vacuum bags, the lamination process may not be as effective, leading to weaker bonds between the layers and potential defects in the final product.

Key 7 features of this silicon bag

  • High temperature resistance for reliable performance in demanding glass lamination processes.
  • Durable and flexible construction for easy handling and installation.
  • The top and bottom interlocking design ensures an airtight seal to prevent air leakage during lamination.
  • Custom-made dimensions to accommodate different glass sizes and shapes.
  • Chemical resistance for longevity and performance in various environments.
  • Easy to clean, thanks to the non-stick property of silicone.
  • Reusable, offering a cost-effective solution.

What Is EVA Glass Lamination?

EVA Glass Lamination is a specialized process in the glass industry that involves the bonding of multiple glass layers using an Ethylene Vinyl Acetate (EVA) interlayer film. This process enhances the structural integrity, safety, and performance of the glass by creating a strong and durable composite material. The EVA interlayer acts as both an adhesive and a protective barrier, holding the glass layers together and providing increased resistance to impact, breakage, and UV radiation.

EVA Glass Lamination finds extensive applications in various industries, including automotive, architecture, and safety, where it is used to produce laminated glass for windshields, windows, facades, and other glass structures. This process not only enhances the strength and durability of the glass but also offers additional benefits such as improved sound insulation, increased safety by holding shattered glass together, and protection against fading caused by UV rays.

Types Of Silicon Bags For Laminated Glass

Silicon bag with E seals

EVA glass lamination vacuum bags with E seals

E-seal silicone bags are commonly used and standard vacuum bags in the production of laminated glass. With their unique “E” shape design, these bags offer enhanced sealing capabilities compared to U-seal bags. The E-seal design provides a stronger and more secure seal along the edges, minimizing the possibility of air leaks during the vacuuming process. This ensures a consistent and reliable vacuum throughout the entire glass lamination process. E-seal bags are particularly suitable for larger-sized laminated glass projects, thanks to their superior strength and durability.

Silicone bag with U seals

U-seal silicon bags have unique U-shaped locks that create a vacuum chamber when sealed. They are widely used for producing laminated safety glass, which involves sandwiching EVA glue films between multiple glass sheets, followed by heating, pressing, and bonding to create flat or curved compound glass products.

In terms of purchase frequency, U stands for “Unique”, indicating that there are fewer buyers for these bags.

Although they are much easier to open and close, the airtightness is far less than that of E-seal bags. So U bags are more likely used for relatively simple laminated glass.

How To Properly Use Vacuum Bags For Glass Lamination?

To achieve optimal results in the lamination process, it is essential to use EVA glass lamination vacuum bags correctly. Here are some steps to follow:

1. Prepare the glass

Clean the glass surfaces thoroughly to remove any dirt, dust, or contaminants that could affect the lamination process.

2. Cut the EVA film

Measure and cut the EVA film to the appropriate size for the glass panels. Use the right amount of EVA adhesive. Apply too much or too little adhesive can affect the quality of the lamination. Make sure to leave some extra margin around the edges for a secure seal.

3. Place the EVA film

Lay the EVA film on a clean and flat surface, ensuring that it is free from any wrinkles or creases.

4. Position the glass

Carefully put EVA films between the glass panels, aligning them properly to ensure an even pressure distribution and a successful lamination.

5. Create a vacuum seal

Place the glass panels and EVA films inside silicon vacuum bags, making sure the staff seal the edges of the bag tightly to create a vacuum chamber.

6. Evacuate the air

Connect the vacuum pump to the bag and start the evacuation process. This will remove the air trapped between the glass panels and the EVA film, allowing for strong and secure bonding.

7. Apply heat and pressure

Once the air is fully evacuated, apply heat and pressure to activate the EVA film and initiate the lamination process. The most important is that please follow the machinery manufacturer’s instructions regarding the temperature and duration of the lamination process.

8. Monitor the process

Keep a close eye on the lamination process to ensure that the EVA film is melting evenly and bonding properly with the glass panels. Maintain the recommended temperature and pressure levels throughout the process. Make any necessary adjustments if needed.

9. Cool down and release the vacuum

After the lamination process is complete, allow the laminated glass to cool down gradually. Once cooled, release the vacuum and carefully remove the glass from the EVA glass lamination vacuum bag.

10. Inspect and finish

Inspect the laminated glass for any defects or imperfections. Trim any excess EVA film if necessary and finish the edges for a polished and professional look.

By adhering to these steps, you can guarantee the correct utilization of EVA glass lamination vacuum bags and attain superior-quality laminated glass products.

Specific Considerations Or Precautions When Using The Bags

Certainly, there are several particular factors and precautions to remember when utilizing EVA glass lamination vacuum bags.

Firstly, it is important to ensure that the bags are properly sealed before starting the lamination process. Any gaps or leaks in the bag can compromise the vacuum environment and result in poor adhesion and bonding of the glass layers.

Secondly, it is crucial to follow the manufacturer’s instructions and guidelines for temperature and pressure settings. Using incorrect settings can lead to uneven lamination or even damage to the glass or bag.

Additionally, it is recommended to regularly inspect the bags for any signs of wear or damage. If a bag is torn or has any defects, it should be replaced to ensure a reliable and safe lamination process.

Lastly, it is important to handle the bags with care to avoid any punctures or tears. Sharp objects or rough handling can damage the bag and compromise its effectiveness.

Tips For Maintaining And Prolonging The Lifespan Of EVA Lamination Silicon Bags

To ensure the longevity of EVA glass lamination vacuum bags, follow these useful tips for maintenance and preservation:

1. Store them properly

When not in use, store the vacuum bags in a cool, dry place away from direct sunlight. This will help prevent any damage or degradation to the bags.

2. Clean them regularly

After each use, clean the vacuum bags thoroughly to remove any residue or debris. Use a mild detergent and warm water to gently clean the bags, and then allow them to air dry completely before storing them.

3. Avoid sharp objects

Be careful when handling the vacuum bags to avoid puncturing or tearing them with sharp objects. This can compromise their effectiveness and lifespan.

4. Inspect for damage

Before each use, inspect the vacuum bags for any signs of damage or wear. Look for tears, holes, or weak spots in the material. If any damage is found, replace the bag immediately to ensure optimal performance.

5. Use proper sealing techniques

When sealing the vacuum bags, make sure to follow the manufacturer’s instructions for the recommended sealing techniques. This will help ensure a tight and secure seal, preventing any air leakage during the lamination process.

6. Avoid excessive heat exposure

While the vacuum bags are designed to withstand high temperatures during the lamination process, prolonged exposure to excessive heat can shorten their lifespan. Avoid placing the bags near heat sources or exposing them to direct flames.

By following the above tips, you can maintain the quality and prolong the lifespan of your EVA glass lamination vacuum bags, ensuring consistent and reliable results in your glass lamination projects.

Where To Look For Silicon Bags For EVA Lamination Furnaces?

If you are in need of EVA laminating silicon bags, there are several options available to consider:

Online searches from Google or B2B marketplaces

Conducting online searches can be an efficient way to find suppliers and manufacturers of silicon bags for laminated glass. Use search engines or b2b websites to identify companies that specialize in these products. Check their websites to gather information about their offerings, product specifications, and contact details.

The proper manufacturer of the laminating machines

Contacting the manufacturer of the EVA lamination furnace you are using or planning to use can be a reliable option. They often have recommendations or partnerships with suppliers who provide compatible silicon bags for their specific machines. The manufacturer can guide you to the appropriate sources for purchasing the required silicon bags.

Trade shows and exhibitions

Attending trade shows and exhibitions related to glass lamination, furnace equipment, or the glass industry in general can provide valuable networking opportunities. These events bring together industry professionals, suppliers, and manufacturers, allowing you to explore a wide range of products and connect with knowledgeable experts. You can inquire about silicon bag suppliers, compare options, and gather information to make informed purchasing decisions.

Remember to consider factors such as product quality, pricing, customer reviews, and compatibility with your specific EVA lamination furnace when evaluating different sources for silicon bags.

Steps To Choose The Right Vacuum Bag For Laminated Glass Process

When it comes to choosing the appropriate vacuum bag for your laminating glass projects, consider the following steps:

Research and find reliable suppliers

Conduct thorough research to identify reputable suppliers who specialize in vacuum bags for laminated glass. Look for suppliers with a track record of delivering high-quality products and excellent customer service.

Evaluate seal type

Determine whether E seals or U seals are more suitable for your specific laminated glass production needs. Consider factors such as seal strength, pressure distribution, and compatibility with your glass dimensions and requirements.

Confirm the bag’s external size

Provide the supplier with accurate external size specifications for the vacuum bag. Alternatively, seek guidance from the supplier to determine the recommended outer dimensions based on your glass dimensions.

Consider cost-effectiveness

Compare prices from different suppliers while considering the overall cost-effectiveness. Take into account the initial cost of the vacuum bags, their durability, and potential long-term savings in terms of performance and efficiency.

Make an informed decision

Review all gathered information, including supplier reputation, seal type, bag size, and cost-effectiveness. Assess your specific requirements and make an informed decision based on the optimal balance of quality, performance, and affordability.

By following these steps, you can confidently choose the right vacuum bag for your laminated glass process. This ensures a secure seal, proper pressure distribution, and the production of high-quality laminated glass products.

What Is The Best Partner For The Bag?

PTFE(Teflon) open mesh sheets are the perfect companions for vacuum silicone bags.

PTFE(Teflon) open mesh sheets For EVA Glass Lamination

During the laminated glass process, a PTFE mesh sheet is positioned between the glass layers and the silicon bag. This mesh sheet features 4mm*4mm holes that facilitate rapid air movement when vacuuming, making it an excellent release sheet for glass lamination.

Additionally, the PTFE-coated fiberglass material adds an extra layer of protection, guarding the vacuum bag against potential scratches or punctures from sharp glass corners. This protective layer not only enhances the efficiency of the lamination process but also improves the overall quality of the final laminated glass product.

For Laminated Glass: Silicone Vacuum Bags Or Silicone Blankets?

Both are used in the production of laminated glass.

Silicone vacuum bags are mainly used for EVA lamination machines.

Silicone blankets are for autoclaves with huge energy consumption and complex process.

Silicone blankets for glass laminationSilicone blankets for lamianted glass

So it’s very easy for you to choose the right type for your applications.

Who Possibly Needs EVA Lamination Silicone Bags?

Based on my knowledge and understanding, here are three possible entities that may require EVA lamination silicone bags:

Laminated glass manufacturers

These manufacturers, equipped with their own facilities, technical expertise, and laminating furnaces, utilize EVA lamination silicone bags as an essential component in the production of laminated glass or safety glass.

Glass laminating oven manufacturers

Manufacturers of glass laminating ovens often seek suitable silicone bags that complement their equipment. They acquire and offer these bags alongside their oven systems to ensure a comprehensive solution for their customers.

Equipment intermediaries and rubber product wholesalers/retailers

Intermediaries involved in the distribution of equipment or rubber products may have a demand for EVA lamination silicone bags. They procure these bags in bulk and subsequently supply them to local laminated glass manufacturers within their respective regions.


In brief, EVA represents ethylene-vinyl acetate, which is held between two or more layers of glass.

Glass lamination is a process for making laminated glass in an EVA laminating machine.

Vacuum bags are used to pack the glass sheets and EVA interlayer films, and decorative inserts and create the vacuum inside for the proper laminating process.

So if you still have some doubts about EVA glass lamination vacuum bags, just leave a message or comment here. We are always ready to answer your questions.

Or contact us through Mobile/WhatsApp number +86-13823789007, or email us directly to sales@cndeerhunter.com

Send An Inquiry

Would you like to SEND an Inquiryto Deer Hunter

Logo for Shenzhen Deer Hunter New Technology Co LTD

Note: Your email information will be kept strictly confidential.