How to distinguish between pvc sheet and pet sheet?

1. Folding method: You can fold it to see if there are white traces. The PVC sheet will have white creases when folded, and the PET sheet will have no white folds in both directions.

2. Combustion method: Because the combustion phenomenon of the two is very different, specifically in the difficulty of burning, melting and dripping, and the burning smell are very different. There is also a difference in the glass transition temperature of the two, and the crystallinity is completely different. PVC is completely amorphous and will not crystallize, while PET is easy to crystallize. PVC sheet is self-extinguishing from fire and has good flame retardancy, while pet is the opposite.

3. In a sunny place, PVC is light blue in the sun.

4. There is a more practical and better way. Buy an oven and adjust the temperature to 250 degrees and bake there for half an hour. If the goods contain PVC, there will be a lot of yellow spots on the surface. If the melting point is not enough, it will be very difficult. Melt quickly.

5. Under the action of high temperature (90-100℃), PVC will gradually become opaque white, which is easy to sort.

6. For the judgment of other material bottles, you can smell the taste first. The taste of PET is different from ordinary plastics. Burn it with a lighter, and then you will smell a very aromatic and comfortable taste. If PET contains other ingredients, the taste will be very pungent. At the same time, if the burning part is too dark or the oil drips very quickly, most of the melting points are abnormal, and this is not PET. When it is burning, pull the silk on the lighter to see if the silk is long, and then Break the pulled silk, and check the breakpoint in the middle to see if the silk is rolled into small circles. The more rolls, the higher the melting point, which means it is PET.