Melting point identification of PET plastic bottle raw material
Mar 27, 2022
The melting point of PET, the raw material of PET plastic bottles, needs to be identified during the processing and production process. How to distinguish high-temperature PET and low-temperature PET? The following will introduce the specific distinction method:
If you have a melting point tester, I believe you will easily get it. When igniting and burning, the wire is stretched and broken. If the broken wire can be rolled into several rolls, it means that the melting point is normal. Because of my lack of experience in this area, I can't specify a few volumes to be qualified. I don't have this ability, so you can test more yourself.
In addition, when igniting, if it melts quickly, it means that the melting point is low, and if the burned bottle becomes particularly black, it means that the melting point is also low, and if it smells very sweet, it may also be because the melting point is low. . This is what the old man said.
1. Smell the taste first, the taste of PET is different from ordinary plastics. Burn it with a lighter, then it will smell very aromatic and comfortable (burn a bottle and smell it), if there are other ingredients in the PET, the smell is very pungent. There is a bottle that contains SEBS ingredients that can't be used.
2. When burning, pull the wire on the lighter to see if the length of the wire is long, then break the pulled wire, and check the breakpoint in the middle to see if the wire is rolled into a small circle. High melting point. But generally if it is a bottle tablet, it should not be a big problem. The most critical point! It is to distinguish whether it contains PVC, which is the fatal injury of PET.
3. If the burning part is too dark or the oil drops very quickly, most of the melting points are abnormal, which is often found in PET film.
Others: When igniting and burning, the wire will be broken after being stretched. If the broken wire can be rolled into several rolls, it means that the melting point is normal. Because of my lack of experience in this aspect, I can't specify a few rolls to be qualified. In addition, when igniting, if it melts quickly, it means the melting point is low, and the burned bottle becomes particularly black, which means the melting point is also low. If the taste smells particularly sweet, it may also be that the melting point is low.
