As a kind of safety glass, when the laminated glass is impacted and broken, due to the bonding effect of the two ordinary glass interlayer films, it will not produce sharp fragments like ordinary glass when it is broken, which will hurt people. At the same time, the sound insulation and sunlight control properties of the laminated film make it a new type of building material with energy-saving and environmental protection functions: the use of laminated glass can not only isolate the penetrable 1000Hz-2000Hz coincidence noise ordinary glass but also block more than 99% of the noise. UV light absorbs heat in the infrared spectrum. As a new type of building material, laminated glass is bound to play a huge role in the use of safety glass.

Commonly used interlayer films for laminated glass are PVB, SGP, EVA, PU, ​​etc.

PVB and EVA are the two most common and widely used interlayer films for laminated glass. Today let's take a look at the difference between PVB and EVA.

The main differences between PVB film and EVA film are as follows:
1)Different resins are used: one is EVA resin and the other is PVB resin.
2)The processing temperature is different: the processing temperature of EVA film is about 110 degrees, and the processing temperature of PVB film is 120-130 degrees.
3)Different processing equipment: The glass deep processing equipment of EVA film is an EVA glass laminating machine, which is easy to operate and low cost. The disadvantage is that it cannot be mass-produced; the glass deep processing equipment of PVB film is a laminated glass production line + an autoclave, which is costly and complicated to operate. Pre-pressing is required after lamination and then heated and pressed into an autoclave. The advantage is that it can be produced in large quantities, but the disadvantage is that there are few glass orders and high processing costs.
4)Different processing and storage conditions: PVB needs low temperature (18-22°C) and dry (humidity 25%.40%) storage, especially the humidity requirements are very strict, high temperature (120-140°C)) high pressure (1.0-1.5 MPa), mostly produced by autoclave; EVA storage conditions are relatively low, the temperature does not exceed 30 ° C, the humidity is less than 80%, the equipment requirements for lamination are also low, the vacuum degree> 700mmHg ( 0.092Mpa), the temperature is 100-110 ° C; The bonding process of PVB is more complicated than that of EVA, which takes longer and consumes more energy.
5)Different water absorption: The water absorption of EVA film is extremely low, less than 0.1%; the water absorption of PVB film is high.
6)Machine size is different: EVA compound furnace needs 6000L x 2200W x 2000H mm, PVB compound line needs 47000L x 9000W x 4000H mm.
7)Different glass application fields: EVA laminated glass is mainly used for indoor partition and decoration due to the low melting point of EVA film. Suitable for laminated glass with EVA film interlayer and wire mesh

Or fabric mesh to make decorative glass with rich patterns and materials; or suitable for outdoor low-rise glass, because if used in an outdoor high-rise, the film will soften when the outdoor temperature is high, thereby reducing the viscosity. The comprehensive strength is easy to cause the glass to fall off; EVA has good water resistance, but the ability to resist ultraviolet rays is average, and it is easy to yellow and age in the sun. Generally, EVA is not suitable for outdoor curtain walls.

Jiaxing Fuying Composite Materials Co., Ltd. is a mono solar panels manufacturer and supplier in China. The company owns the mono solar panel factory. It sells  PV solar panels and PVB films all year round.