In daily life, a lot of PE plastic bags are used to package the products, but many types of packaging materials and names are called. When we need to use PE plastic bags, what method do we use to identify? The PE film is widely used in the manufacture of plastic bags, plastic films, and milk barrels. Its name is also polyethylene, which is resistant to a variety of organic solvents, resistant to a variety of acid and alkali corrosion, but not resistant to oxidizing acids such as nitric acid. Polyethylene is oxidized in an oxidizing environment. Polyethylene can be considered to be transparent in the film state, but in the presence of a block, strong light scattering opacity occurs due to the presence of a large amount of crystals inside. The degree of crystallization of polyethylene is affected by the number of branches, and the more branches, the more difficult it is to crystallize. The crystal melting temperature of polyethylene is also affected by the number of branches, distributed in the range from 90 degrees Celsius to 130 degrees Celsius, and the more the branches, the lower the melting temperature. Polyethylene single crystals can usually be prepared by dissolving high density polyethylene in xylene in an environment above 130 degrees Celsius.
The structural formula of the plastic bag: - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 pe The most simple way to identify the plastic bag is as follows:
1. Cut a small piece and put it in the water. Floating on the surface is PE.
2. Ignite, PE has a candle smell.
3, it seems that pe plastic bag is transparent
4, touch it, pe plastic bag is smooth, feel comfortable.