What are the key points of control in the production of PVC skinning and foaming board?
What are the key points of control in the production of PVC skinning and foaming board? It is necessary to make the blisters of PVC skinned foam board dense and evenly distributed. In addition, there is a hard and dense surface layer, which is the key to be controlled in the production process: 1. The extruder and die can provide continuous high pressure to make the foaming agent dissolve in the