PVC foam board is also known as expanded pvc board or foamed PVC, which is widely used in bus, train car roof, box core, interior decoration board, building exterior wall board, interior decoration board, office, house, public place building partition, commercial decoration shelf, clean room board, ceiling board, stencil printing, computer lettering, advertising signs, display board, sign It is also used for chemical anti-corrosion projects, thermoformed parts, cold storage panels, special cold preservation projects, environmental protection panels, sports equipment, breeding materials, waterfront moisture-proof facilities, water-resistant materials, aesthetic materials and various lightweight partitions instead of glass canopies. It has a wide range of uses, and is increasingly popular because of its relatively low price and superior performance.
Rigid PVC foam board is made of polyvinyl chloride (PVC) as the main raw material through a special foaming process. As one of the typical new chemical building material products with plastic instead of wood, it is a very ideal green building decoration material due to its density with fine bubble pore structure inside and surface similar to natural wood.
There is relatively little research on the formulation, process and equipment of special rigid PVC foam boards. As the process changes with the material, extruder and die, the material is different, the extruder specification and screw structure are different, the extruded profile specification and shape are different, the process adjustment methods taken are very different.
The complexity of the extrusion process of rigid PVC foamed sheets determines the difficulty of achieving crust foam molding. The quality of PVC crust foam sheets is directly related to various factors such as screw speed, extrusion temperature, extrusion pressure and structure of the head, mouth die and cooling die. Therefore, in order to obtain high quality rigid PVC foamed sheets, advanced sheet production line equipment and suitable crust foam processing technology are necessary.