The main component of PE protective film is polyethylene, which is a harmless chemical material. PE film, that is, polyethylene film, refers to the film produced with PE film. The use of PE protective film has become more and more extensive with the development of society, and can be seen almost everywhere in life. What are the materials and uses of PE protective film?
The PE film has moisture resistance and low moisture permeability. Polyethylene film (PE) can produce low-density, medium-density, high-density polyethylene and cross-linked polyethylene and other products with different properties according to different manufacturing methods and control methods.
Generally speaking, as the density increases, the mechanical properties and barrier properties will increase accordingly, and the heat resistance will also be good. Polyethylenes of the same density have different properties due to different film forming processes. This is because the drooling method can rapidly cool, low crystallinity, high transparency, and low turbidity, but the molecular arrangement tends to be more irregular, so the barrier property is small, that is, the transmittance is large, the elongation is low, and the tear resistance is low. Poor cracking.
Low density polyethylene film. Its density is about 0.92g/cm3. Low-density polyethylene film has good transparency and heat-sealability, and can be waterproof and moisture-proof; low tensile strength, high tensile elongation, easy to wrinkle, film below 0.03mm, the tension control should be small, and the tension everywhere It should be constant, especially when it is heated, it is more likely to be deformed, causing difficulty in color registration. Therefore, when drying, the surface temperature of the film should not be too high (within 55 degrees). According to the different film forming process, it can be divided into blown film (IPE), cast film (CPE), low foaming film and so on. The tensile strength and opening of IPE film are better than CPE film, and it can be used for food bags, clothing bags, etc. with front printing; CPE film has uniform thickness, better surface gloss, transparency and heat sealability than PE, and can be printed on both sides. But the production cost is high. The CPE film is mainly used as the inner layer of the composite bag and the packaging of cosmetics, pickles and cakes; the low-foaming film has good decorative properties, thick texture, and is not easy to be stretched and deformed.
Medium density polyethylene film. Its density is about 0.93 ~ 0.94g/cm3, and its performance is between high density and low density polyethylene.
High density polyethylene film. The density is 0.94-0.965g/cm3. The heat resistance and mechanical strength of high-density polyethylene film are better than that of low-density polyethylene film, and the tensile elongation is small. The film thickness is generally above 0.03mm, but the transparency is poor. With front printing, it is mainly used as vest bag, garbage bag and liner bag, etc.
XLPE. Because it has higher heat resistance, tensile strength, thermal shrinkage and barrier properties than other polyethylene products, its use is further expanded, and it is mostly used as heat shrinkable packaging film in 2014.
Zhongshan Jinjiuyuan Protective Film Co., Ltd. is a manufacturer of self-adhesive temporary surface protective film. Our company provides surface protection solutions for manufacturers of uncoated metals, plastics and decorative panels.
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