![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
1. PE (polyethylene) film is colorless, odorless, slightly milky white in appearance, non-polar on the surface, difficult to print and bond, and must be improved after surface treatment to be suitable for printing and bonding.
2. The water permeability of PE film is less than 0.01%, water resistance is good, but the permeability is large, suitable for moisture-proof packaging, not suitable for vacuum packaging. It has a waxy feel, is flammable, low smoke when burning, there are drops falling from the melt, the flame is slightly yellow and blue, and the smell of paraffin is smelled.
3. PE film has low tensile strength, poor creep resistance, and good impact resistance.
4. PE is a chemically inert polymer with good chemical stability, which can resist the corrosion of acid, alkali and salt solvents at normal temperature.
When the temperature is below 60 ℃, it is insoluble in general solvents, but it will swell or crack after prolonged contact with fat and aromatic solvents. If the temperature exceeds 60 ° C, it can be dissolved in toluene, amyl acetate, triethylene, turpentine, mineral oil and paraffin in small amounts. After exceeding 100 ℃, it is soluble in tetralin. PE film will also swell, penetrate, and change color when it comes into contact with vegetable oil, and it will cause its internal naphthalene to precipitate and dissolve in vegetable oil after prolonged contact.
In this way, the shelf life of foods containing vegetable oil will be greatly shortened, which is also harmful to human health. Therefore, PE film is not suitable for packaging fried foods and foods containing vegetable oils.
Jasmine Essential Oil,Rose Oil For Skin,Rose Massage Oil,Flower Blend Essential Oil
Ji'An ZhongXiang Natural Plants Co.,Ltd. , https://www.jxzxessentialoils.com