How to identify pet plastics

Update:15 Jan 2018

PET plastics are the abbreviations of English Polyethyl […]

PET plastics are the abbreviations of English Polyethylene terephthalate, referred to as PET or PETP. Polyterephthalic acid, mainly including Polyterephthalate two ester PET and polybutylene terephthalate PBT. Polybutylene terephthalate is also commonly known as polyester resin. It is a polycondensation of terephthalic acid and ethylene glycol. Together with PBT, it is called a thermoplastic polyester, or a saturated polyester.
How to identify PET Plastics:
1, smell the smell first. The smell of PET is different from general plastics. Burn it with a lighter, and then smell a very fragrant and comfortable smell. (if you burn a bottle to smell it), if PET contains other ingredients, the taste will be very pungent. There is no use of SEBS in a bottle.
2. Look at the burned part, if it is too dark or the oil droplets are fast, most melting points are abnormal, which is often found in the PET film.
3, drawing, when burning on the cigarette lighter pull wire, see the long wire, then pull out the wire snapped, see the middle wire is not a breakpoint, small circle, volume more high melting point.
But generally, if it is a bottle, there should be no big problem. The key point is to distinguish whether or not PVC is contained, which is a fatal injury to PET. The first multi - sample, then the sunny place, PVC in the light blue in the sun. If there is a white crease in the fold. The above is the naked eye identification, the accuracy is limited, mainly to see the experience.
There is a more practical and better way to buy an oven to heat it up to 250 degrees, and bake for half an hour there. If the product contains PVC, there will be a lot of yellow spots on the surface. If the melting point is not enough, it will melt quickly.