Pet cup has good mechanical properties

2020-05-19 19:12:56 lihaigang 1

Pet cup has good mechanical properties, impact strength is 3 ~ 5 times that of other films, good folding resistance

Resistant to oil, fat, acid and alkali, resistant to most solvents. With excellent high and low temperature resistance, it can be used in the temperature range of 120 ℃ for a long time, 150 ℃ for a short time, and - 70 ℃ for a low temperature, and has little effect on its mechanical properties at high and low temperature. The permeability of gas and water vapor is low, and it has excellent properties of gas resistance, water, oil and peculiar smell. High transparency, UV blocking, good gloss. It is nontoxic, tasteless, hygienic and safe, and can be directly used in food packaging.

 

The molecular structure of PET plastic is highly symmetrical, and it has certain crystallization orientation ability, so it has high film-forming and formation. Pet plastics have good optical properties and weather resistance, amorphous pet plastics have good optical transparency. In addition, pet plastic has excellent wear resistance, friction, dimensional stability and electrical insulation. PET bottles are widely used because of their high strength, good transparency, innocuity, impermeability, light weight and high production efficiency. The structure of PBT and PET molecular chain is similar, and most properties are the same, except that the molecular main chain has changed from two methylene to four, so the molecule is more flexible and the processing performance is better.

Common pet:

There is a triangle with an arrow at the bottom of the plastic bottle. There is a number in the triangle. The following numbers in the triangle at the bottom of the plastic bottle refer to the ingredients contained in the bottle and the impact of the ingredients on human health

 

1 - Pet polyethylene terephthalate: common in mineral water bottles, carbonated beverage bottles, etc. When the temperature reaches 70 ℃, it is easy to deform and some harmful substances melt. After 10 months of use, No. 1 plastic may release the carcinogen DEHP. This kind of bottle can't be put in the car to bask in the sun, and can't contain alcohol, oil and other substances.

 

In the past two years, the Indian intercontinental recycling company has produced qualified recycled PET. It is reported that the unit of Indian owned intercontinental recycling in the area of Skelmersdale in northern England started trial operation in November 2007. According to the plan, the unit can recover and transform 30000 tons of waste plastic bottles every year. In addition, the device has some sorting, washing and drying equipment, and the products produced will be hot pot bottle slices for non edible products. Consumers can use this material to package non edible products or as a middle to separate two layers of edible materials. At present, in the UK, the market price of recycled PET bottles for non edible products is about 600 pounds / ton.