The difference between PVB and EVA

1. What are PVB and EVA?

PVB stands for Polyvinyl Butyral, while EVA stands for Ethylene Vinyl Acetate. The main difference between the two is that PVB is a thermosetting plastic that is more heat-resistant and durable, while EVA is a thermoplastic elastomer that is more flexible and cost-effective.

2. Processing

PVB laminate should be produced at high temperatures (120℃140℃) and high pressure (1.0mm-1.5MPa), most of which are made by autoclave.

The requirement of EVA lamination is low, with vacuum ≥ 700mmHg (0.092Mpa) and temperature is 100℃-110℃.

The PVB laminated glass line is much more expensive than EVA laminated glass line.

3. Performance

Both the aging resistance and impact resistance of PVB are stronger than that of EVA.

The sound insulation effect of EVA is better than that of PVB, especially in high-frequency noise.

4. Use for

PVB laminated glass is used outdoor, like building curtain walls, automotive windscreens, bullet-proof glass, etc.

EVA is mostly used for interior decoration.

5. How to distinguish between PVB and EVA.

PVB is more resistant to high temperatures than EVA. Scalding EVA film with boiling water will crimp the edge, but PVB film will only soften a little.

Scalded the finished laminated glass with boiling water, the intermediate glue of EVA glued glass will protrude a little.