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Features and applications of polyester film

2015-08-17 Hits:2478
Polyester film has good toughness and mechanical strength, and excellent transparency, but relatively poor slip, if you add slip agents, can cause mild fogging film. Without further additives. Polyester film for food is inert. Heat sealing is difficult, due to the crystallization of shrinkage and embrittlement, it is commonly used polyester film adhesive sealing, but the best way is with low density polyethylene composite, to take advantage of low-density polyethylene film excellent heat-sealing properties .
    Polyester film is very low water vapor permeability, low density polyethylene similar, air, odor permeability is low, which is similar to nylon. It can be resistant to acid, alkali, but the concentrated acid, alkali therewith role. Resistance to most solvents, oil and fat.
    Polyester film has excellent tear resistance and the ability to fold and wear durability. Good impact resistance can be maintained to about -70 ℃. It has excellent electrical insulating properties, breakdown strength, dielectric properties, volume resistivity is quite high.
    Oriented unstretched polyester film can be thermoformed. After stretching orientation without heat setting of the film can be used as shrink film, shrink temperature of about 100 ℃.
    The polyester film can be vacuum metallization, metallized film has a good decorative. Polyester film in packaging, industrial and agricultural fields have a wide range of applications, in which a larger amount of the base areas of the magnetic tape, photographic film base, electrically insulating materials.

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