The difference between PET precoat film and BOPP precoat film

The PET pre-coated film, that is, the polyester film and the EVA hot melt adhesive form a composite film of lamination structure, which has superior composite properties and can be laminated without affecting the superior performance of the PET precoat film. Original name of polyester: Poly(p-butyl phthalate), the properties are as follows: 1) The mechanical strength is large, and its tensile strength is about 5 to 10 times that of polyethylene. Therefore, 12mic PET film has been widely used, 9mic pole Thin PET films are also used. In addition, polyester films have the advantages of high stiffness and high impact resistance. 2) good heat resistance, melting point 260 ° C, softening point 230 ~ 240 ° C, even if the biaxial stretching process, at high temperatures, its thermal shrinkage is still very small, with excellent dimensional stability, long at high temperatures Time heating does not affect its performance. 3) It has good oil resistance and chemical resistance, has good acid corrosion resistance, and is resistant to attack by organic solvents and oils, but is easily deteriorated when exposed to strong alkali. 4) Excellent gas barrier and good odor barrier. 5) The barrier property to water vapor is inferior to that of polyethylene and polypropylene. 6) High transparency, light transmittance above 90%, good gloss and good printing performance. 7) Prevent poor UV transmission.

BOPP precoat film:

The BOPP pre-coated film, that is, the polypropylene film and the EVA hot melt adhesive form a composite film of lamination structure, has unique properties, can improve the defects of the ordinary polypropylene film, and exerts the superior performance of the polypropylene film. 1. Polypropylene is produced by polymerizing from exhaust gas after high temperature cracking of petroleum under the action of a catalyst. 2. Properties of polypropylene film: Advantages: 1) Light weight and density of 0.91g/cm2, it is one of the lightest plastic films and can float on the water surface. 2) The heat resistance is good, which is an excellent property that thermoplastics do not have. 3) Good chemical stability, acid and alkali resistance, moisture barrier and waterproof barrier properties. 4) Non-toxic, odorless, tasteless, like polyethylene, is recognized as the best material for food packaging in the world. 5) High transparency, good gloss, especially suitable for internal printing, good printing adaptability Disadvantages: 1) Poor oxygen barrier, easy to age under sunlight. 2) The low temperature resistance is poor, and the texture is brittle at low temperatures. 3) When used for printing, it is necessary to obtain a good effect by surface corona treatment (surface tension of 38 mN/m or more). 4) High static electricity. If there is no static elimination device, antistatic agent needs to be added during production.

The above is the difference between PET pre-coated film and BOPP pre-coated film. I hope everyone will continue to pay attention to Jiuzhi Plastics.

Jiuzhi Plastics Network