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How to identify PE bags in life?

Release time:2022-05-13Views: 480

In daily life, many PE plastic bags are used to package products, but there are many kinds and names of packaging materials. When we need to use PE plastic bags, what method do we use to identify?


PE film is widely used in the manufacture of plastic bags, plastic film, milk pail products. Its name is also polyethylene, is resistant to a variety of organic solvents, a variety of acid and alkali corrosion, but not resistant to oxidizing acids, such as nitric acid, in the oxidizing environment polyethylene will be oxidized.


Polyethylene can be considered transparent when it is a thin film, but opaque when it is in bulk due to strong light scattering due to the large number of crystals inside. The degree of crystallization of polyethylene is affected by the number of branches, the more branches, the more difficult to crystallize. The melting temperature of polyethylene crystal is also affected by the number of branches, ranging from 90 ° C to 130 ° C. The more branches, the lower the melting temperature. Polyethylene single crystals can usually be prepared by dissolving hdPE in xylene at temperatures above 130 ° C.


PE plastic bag structure formula: - CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2.


The simplest way to identify PE plastic bags is as follows:


1. Cut a small piece and put it in water. Floating on the water is PE.


2, lit, PE candle smell.


3, it looks like PE plastic bags are transparent.


4. PE plastic bag is smooth and comfortable to touch.


Pull up the tension, it is difficult to break.


PE plastic bag identification is actually very simple, water, a burn a look a smell a touch a pull on the line


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