Classification Of Polyester Film Materials And Production Process

Here is a Blister Clamshell Packaging Factory talking about classification of polyester film materials and production process.

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According to the raw materials used in the production of polyester film and the stretching process, it can be divided into the following two types:

1. Biaxially stretched polyester film, which is made of bright materials. BOPET film has the characteristics of high strength, good rigidity, transparency and high gloss; odorless, odorless, colorless, non-toxic, outstanding toughness; its tensile strength is 3 times that of PC film and nylon film, and the impact strength is BOPP. 3-5 times of the film, excellent wear resistance, folding resistance, pinhole resistance and tear resistance; heat shrinkage is extremely small, at 120 ° C, only shrinks 1.25% after 15 minutes; Good antistatic property, easy to vacuum aluminum plating, can be coated with PVDC to improve its heat sealability, barrier properties and printing adhesion; BOPET also has good heat resistance, excellent retort resistance, low temperature freezing Sex, good oil and chemical resistance. In addition to nitrobenzene, chloroform, and benzyl alcohol, most of the chemicals in BOPET film do not dissolve it. However, BOPET will be attacked by strong alkali and should be used when using it. BOPET film has low water absorption rate and good water resistance, and is suitable for packaging foods with high water content.
2, uniaxially stretched polyester film, is a semi-dull material (added titanium dioxide in the raw material polyester chips), dried, melted, extruded, cast and longitudinally stretched film, grade in polyester film And the lowest price, mainly used for pharmaceutical tablet packaging. Due to the small amount of use, the manufacturers are less mass-produced, accounting for about 5% of the polyester film field, and Chinese companies are also less imported, with a standard thickness of 150 μm.

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