Silicone Vacuum Bags for Laminated Glass Production
Overview
Laminated glass is a staple in modern architecture and automotive industries, offering enhanced safety, security, and acoustic insulation. A critical component in its production is the use of silicone vacuum bags, particularly during the pre-pressing phase of EVA lamination and the PVB lamination of curved glass. These specialized bags play a pivotal role in ensuring the quality and durability of the final product.
Silicone Vacuum Bags Function in Glass Lamination
The process of laminating glass involves bonding layers of glass with an interlayer, typically EVA film or PVB film under heat and pressure. Silicone vacuum bags are essential in this process because they apply even pressure across the glass surface, ensuring a uniform bond.
What Are Silicone Vacuum Bags?
Silicone vacuum bags are made from a high-grade, flexible silicone material that can withstand the extreme temperatures and pressures needed for glass lamination. They are designed to be airtight, creating a vacuum environment that exerts uniform pressure across the glass layers during the lamination process. The transparency of the silicone material allows technicians to monitor the process and ensure that no air bubbles or imperfections compromise the quality of the laminated glass.
Utilizing Silicone Vacuum Bags in Lamination
When producing laminated glass, the assembly of glass and PVB interlayer is placed inside the silicone vacuum bag. The bag is then sealed and connected to a vacuum pump, which removes the air from inside the bag, creating a vacuum. This vacuum exerts pressure on the assembly, pressing the layers together tightly.
The next step involves placing the sealed bag into an autoclave or oven, where it is subjected to controlled heat. The heat activates the adhesive properties of the PVB film, causing it to bond strongly to the glass layers. The vacuum ensures that the pressure is distributed evenly, preventing any air pockets or misalignment.
During the heating phase, the silicone bag’s flexibility becomes crucial. It must contour to the shape of the glass, whether flat or curved, without compromising the vacuum seal. This adaptability makes silicone vacuum bags invaluable for creating complex glass shapes that are both aesthetically pleasing and structurally sound.
Contact us today to learn more about our silicone vacuum bags
If you want to purchase silicone bags for the production of laminated glass from China, you can find many sellers on Alibaba or Made-in-China. If you need assistance, you can also contact us.