Correctly distinguish the crust quality of PVC crust foam boardCorrectly distinguish the crust quality of PVC crust foam board
PVC crust foam board has excellent corrosion resistance, insulation, and has a certain mechanical strength; after secondary processing can be made into sulfuric acid (hydrochloric acid) tank (barrel box); empty needle rack for medicine, chemical rack ; Public toilet water tank; various shaped products and containers such as template, decorative board, exhaust pipe, equipment lining of processed products, etc., which are ideal materials for chemical industry, building materials, decoration and other industries. Today, let's talk about the quality discrimination method of PVC crust foam board.
The chemical composition of PVC crust foam board is polyvinyl chloride. The crust is formed by the Seluka method, forming a dense and hard crust layer on both sides of the plate, which can improve the hardness and nail holding force of the plate. Furniture or house decoration, these physical properties are very important.
The outer skin of the melt is compressed and cooled in the styling device directly connected to the die, and the core die in the cavity ensures that there is space inside the extrudate leaving the die. These spaces are free in the styling die by the melt The foam is filled. The cooling strength, the size of the core mold, and the extrusion speed can affect the density of the foamed core layer and the thickness of the outer layer crust. The complex shapes produced by this method have the characteristics of low density, high hardness and smooth surface.
To identify the quality of the PVC crust foam board crust, it is actually very simple, use your thumb nail to press firmly on the surface of the PVC board, and then carefully check if there are deep dents, if there are, it is obviously false. In addition, there is a core layer in the middle of the real skinned foam board, and the core layer in the middle of the real skinned foam board is clearly visible.
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