Single layer one time extruded pvc board often suffers surface scratch, layered peeling and uneven density after long term use. Traditional post lamination process generates bubbles and wrinkles easily, increasing product reject rate. Co extrusion sheet one step forming technology completely solves these common pvc board production defects.
Co extrusion sheet adopts multi channel simultaneous melt extrusion without extra adhesive bonding between layers. Each material layer fuses under high temperature molten state to form integral molecular connection. Post attached single layer pvc board will separate along adhesive layer under temperature difference, while co extrusion finished pvc board never split after years of use.
Standard co extrusion sheet sets independent formula for surface layer and core layer separately. The compact outer layer adds anti UV and scratch resistant additives for decoration appearance protection, while foamed inner core reduces overall product weight and cuts raw material cost without sacrificing structural rigidity of pvc board.
Multi head synchronous extrusion control keeps consistent thickness and density across whole co extrusion sheet panel. Single layer extruded pvc board has internal density deviation leading to uneven cutting during carving and grooving. Co extrusion raw material supports precise CNC processing without surface collapse or edge cracking during deep machining.
Ordinary pvc board needs separate pvc film lamination after molding, consuming extra labor and production time. Co extrusion sheet directly forms finished decorative surface during extrusion molding, canceling independent laminating procedure and lowering overall finished pvc board manufacturing cycle and labor expenditure for material factories.