“PVB laminated glass”

PVB

PVB (PolyVinyl Butyral Film) film (chemical name is polyvinyl butyral film), which is essentially a thermoplastic resin film, is produced by adding PVB resin and plasticizer. PVB film is widely used in architectural laminated glass, automotive laminated glass, and the like. It has good safety and prevents the glass from being broken by the external force and the debris splashing and hurting people. In addition, it is soundproof, UV resistant, and can be made color or highly transparent.

PVB film has been used in building curtain wall glass for 70 years. In the automotive and construction industry regulations, PVB film is required for safety protection.

PVB laminated glass

The PVB film is sandwiched between the glass in the dust-free joint room, preheated by the rolling press, and then processed by high temperature and high pressure in the autoclave. PVB laminated glass has the following characteristics:

Safety: PVB film has good adhesion. Once the glass is impacted, the fragments will be firmly bonded to the film to prevent debris from falling and harming the human body. After a building with laminated glass is subjected to a storm, earthquake or explosion, the glass fragments can be completely retained in the door and window frame without causing damage to indoor personnel.

Anti-theft: Laminated glass has excellent anti-intrusion ability, greatly increasing the difficulty of entering the room by breaking glass. In resisting violent invasion, PVB film can pass UL972 anti-theft test and EU standard. When the glass penetrates through the glass, the crack is generated after the glass is broken due to the bonding force of the film. Therefore, the laminated glass is particularly suitable for the window of a jewelry store and various other shops, and the invader can not damage the laminated glass even with the cutter. Prevent criminals from entering. Therefore, the anti-theft performance of laminated glass is much better than that of ordinary tempered glass. In the event of an explosion, a large degree of damage is caused by the splash of glass. The use of laminated glass can reduce the chance of glass fragments falling off after impact, thus reducing the damage of indoor personnel. In general, the thicker the film or glass, the higher the safety factor of the glass structure. The following are the structural recommendations for various glass applications.

UV-resistant: PVB uses high-performance UV-resistant additives to block more than 99% of UV rays, giving indoor furniture or personnel extra protection, avoiding discoloration and aging due to long-term exposure to UV radiation, and reducing the risk of sunburn.

Insulation: Infrared rays in the air increase the indoor temperature. Laminated glass can filter a large amount of infrared rays, reduce the conduction of heat inside and outside the room, and has a significant effect on reducing the air conditioning load in summer, thereby reducing energy consumption and slowing global warming. Sound insulation: laminated glass can effectively reduce the penetration of sound waves into glass, achieve good sound insulation, reduce outdoor noise transmission, make the indoor environment more quiet and comfortable, generally 0.38PVB can reduce noise by 4.0dB, 0.76PVB can reduce noise 5.5dB, 1.14PVB can reduce noise by 6.0dB, 1.52PVB can reduce noise by 7.0dB.

Color PVB laminated glass

The most common colors of PVB are transparent color, milky white and porcelain white. In addition, there are various color PVBs such as red, yellow and green. The thickness of color film is only 0.38mm. Color laminated glass is usually superimposed with color film. A certain thickness of transparent film is heated and pressed, and the common color film types are as follows:

Laminated glass PVB film thickness design principle

PVB film thickness is normally 0.38mm, 0.76mm, 1.14mm, 1.52mm. The conventional thickness and size are as follows:

Laminated glass PVB film thickness design principle

Whether the thick film and glass are tempered during lamination is related to the area of the glass. The minimum thickness of the commonly used glass film can be determined according to the following requirements:

PVB laminated glass is generally used in buildings for the following places: