Views:13 Author:Site Editor Publish Time: 2021-04-28 Origin:Site
In daily life, many PE tapes are often used to package products, but there are many types and names of packaging materials. When we need to use pe tape, what method should be used to identify it?
PE film is widely used in the production of plastic bags, plastic films, and milk barrels. Its name is also called polyethylene film. It is resistant to a variety of organic solvents and acid and alkali corrosion, but it is not resistant to oxidizing acids, such as nitric acid. Polyethylene will be oxidized in an oxidizing environment.
Polyethylene can be considered transparent in the state of a film, but when it exists in a block shape, there will be strong light scattering and opacity 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 it is to crystallize.
The melting temperature of polyethylene crystals is also affected by the number of branch chains, which are distributed in the range from 90 degrees Celsius to 130 degrees Celsius. The more branch chains, the melting temperature is at the end of the month. Polyethylene single crystals can usually be copper drums to put high-density polyethylene at 130 degrees Celsius. Prepared by dissolving in xylene in the above environment.
The structural formula of PE tape: -CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2 The simplest way to identify PE tape is as follows:
1. Cut a small piece and put it in the water, the one floating on the water is PE
2. Lit, PE has the smell of candles
3. The PE tape looks transparent
4. PE tape feels smoother and feels more comfortable
5. It is more tensile when pulled up, and it is difficult to break