Plastic protective film is a film product made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. It can be used not only for product packaging but also as a coating layer. However, the characteristics and uses of protective films made from different plastic materials are also different.
One of the PVA-coated high-barrier plastic protective films is a highly-barrier film formed by coating a modified polyvinyl alcohol water-soluble liquid on a substrate with a polyethylene plastic as a substrate. Due to the good barrier properties of polyvinyl alcohol high barrier composite membranes and the environmental protection requirements, this protective membrane is widely used in the food industry.
The biaxially oriented polypropylene plastic protective film is made by mixing a polypropylene raw material and a functional additive with a special production line, melt-kneading it into a sheet, and then making a film by stretching. It not only has the advantages of low density, good corrosion resistance and good heat resistance, but also has good optical properties, high mechanical strength, and rich source of raw materials. In addition, it can also be applied to the preparation of electrical films. Microporous membrane and other high value-added functional products.
It is also a plastic protective film. Low density polyethylene film has low density, softness, low temperature resistance, good impact resistance, good chemical stability, corrosion resistance under normal conditions, acid and alkali resistance, and salts. Good electrical insulation properties.
Polyester film is also a very common plastic protective film. It is made of extruded film and made of biaxially stretched film material. Excellent mechanical properties, rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature and low temperature resistance, chemical resistance, oil resistance, airtightness and good fragrance retention, commonly used as packaging material packaging outer material , printing better.
The plastic protective film we are more familiar with is a nylon film. It is not only transparent, but also has good gloss, high tensile strength and tensile strength, and also has good heat resistance, cold resistance, and oil resistance. It is resistant to organic solvents, excellent in abrasion resistance and puncture resistance, is soft, and has excellent oxygen barrier properties and is suitable for packaging rigid articles.
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