Introduction of GMT stack board
Material: Car trimming corners and waste materials are chosen as the main materials, which are basically equivalent to the characteristics of PVC.
Process: Hot rolling.
The deformations below 50 degrees are not large, and the brittle crack resistance in winter is better than that of PVC, which is not affected by humidity. Now the market has developed to inject U-shaped iron into both sides of the product. Increasing the transverse bending strength of the stack can improve the temperature resistance index, but the cost increase is relatively large and the weight is lighter than that of PVC, which is about 1.3.
The surface flatness is not good (the process can be improved).
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