As I came to the Laboratory of Synthetic Leather. I found out the way to differentiate PU (Polyurethane) and PVC (Poly Vnyl Chloride).
First you should clean the surface of the synthetic leather and then bring the synthetic leather near you ear and bend the surface of the synthetic leather so they meet surface-to-surface. Slowly you tap both surface together and release the surface.
If you hear a sound of the surface then it must be a pvc (poly vynl chloride) if it is not it should be the PU (Polyurethane) Synthetic leather.
PVC Synthetic Leather can be processed in two ways:Calender and Casting Calender is a Machine used to produce continues sheet material from such plastics as PVC and polyethylene and consisting essentially of two or more internally heated or cooled counter-rotating rolls between which the material passes.
Calenders are also used to apply a plastics covering to backing materials such as paper, fabric and foil. In this operation the backing material and the plastics film are squeezed together to consolidate them, and fused on heated rollers.
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