What kind of plastic is pet? How to identify pet plastics?

There are many kinds of plastic products in our life, and perhaps the most common one is PET plastic. 

The raw material of all kinds of beverage bottles we use every day is PET plastic, so what on earth is PET plastic? 

PET comes from English Polyethylene terephthalate, which is translated as Poly (terephthalic acid) plastics in Chinese. 

This is the name of a plastic category, specifically, including poly (ethylene terephthalate), poly (butylene terephthalate), poly (ethylene terephthalate). 

It is formed by Polycondensation of terephthalic acid and ethylene glycol. It is a kind of heat-shrinkable polyester and saturated polyester. 

PET plastic is a kind of plastic with highly stacked molecular structure and has good crystallization orientation ability. 

Because of these two properties, PET plastic has a good film-forming property. 

Not only that, good optical properties and weather resistance are also two landmark features of PET. 

Moreover, PET is plastic and is a good insulating material. 

Its various characteristics determine that it is a good material for making plastic bottles. PET plastic bottles are light in weight, non-toxic and strong in structure. 

PET plastic has a wide range of applications in many fields. Let's take a look at it. 

Thin film sheet. 

PET plastic is widely used in the packaging of all kinds of food and drugs, because this kind of goods have high requirements for non-toxic and harmless plastics, and PET just meets this kind of demand. 

PET plastic is also a good packaging material for precision instruments and electrical components. Packaging with PET plastic film can play a good protective role and prolong service life. 

Packing bottle. 

We see the most PET plastic industry is the packaging bottle industry, at first, PET plastic bottles are only used in Coke, Sprite and other carbonated beverage bottles, now in beer, cosmetics, cooking oil, medicine and other items on the packaging bottles have been used PET plastic. 

mechanical equipment. 

PET plastic can often be seen on mechanical equipment. 

For example, gears, motor frames, pump cases, watches and clocks can all be made of PET plastic, and outdoor billboards and models are frequent users of PET plastic. 

Since PET plastic has such a wide range of applications, how should we identify PET plastic? 

Smell. 

First of all, smell the smell of PET plastic. After lighting PET plastic with a lighter, we will smell a more fragrant smell, and there will be no pungent smell. If there are other materials in PET plastic, it will produce a pungent smell. 

Roast. 

One of the most practical ways to identify PET plastics is to bake them. 

Because many PET plastics are adulterated with PVC plastic, we set the oven temperature to 250C and bake the target plastic on it for a period of time. If there is a PVC material, there will be a lot of yellow spots on the plastic surface. 

PET plastic has many advantages. After recycling, it can also become a raw material for a variety of industrial supplies. After using PET plastic bottles, we must not throw them everywhere, but should recycle them in an orderly manner.

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