... double-screw extrusion design in domestic, to ensure the even plasticization, stable extrusion, and make the quality of product more steady and ... auto-inspect/adjust pressure, to make sure more even extrusion and better quality. 4, With good adhesive for abio-glass, transparent, hot-proof ... proof, PVB film is the main material of making windshield glass. pvb film production line5, It’s also used widely ...