From the perspective of the layman, there is no obvious distinction between PET and PVC, and many people will be confused.

Now why Qunjia Plastic Box Factory does the following analysis.

Hard PVC 1. Long plasticizing time and slow extrusion speed

Second, the sample has poor mechanical properties and high price

Third, the sample section has white marks

PET is also close to physical properties

There is a most direct method, using a lighter to burn the sheet, because PVC is flame retardant, can be ignited with a lighter, and the lighter is extinguished as soon as it leaves, the smell is relatively large.

And PET, it can ignite, the lighter will continue to burn when it leaves, the smell is not bad.

The transparency of PP is lower than that of PVC and PET, but the softness of PP is relatively high. The bad point of PP is that there is a grain direction.