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What is PET material

- Dec 04, 2017 -



What is PET material


Polyethylene terephthalate abbreviation PET ,By dimethyl terephthalate and ethylene glycol transesterification or terephthalic acid and ethylene glycol esterification synthesis of hydroxyethyl terephthalate, and then the polycondensation reaction. Is a crystalline saturated polyester, milky white or light yellow, highly crystalline polymer, the surface smooth and shiny. Is a common life in the resin, can be divided into APET, RPET and PETG.

In a wide temperature range with excellent physical and mechanical properties, long-term use temperature up to 120 ℃, excellent electrical insulation, even at high temperature and high frequency, the electrical performance is still good, but less corona resistance, resistance Creep, fatigue resistance, abrasion resistance, dimensional stability are good.


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PET is milky white or light yellow, highly crystalline polymer, the surface is smooth and shiny. In a wide temperature range with excellent physical and mechanical properties, long-term use temperature up to 120 ℃, excellent electrical insulation, even at high temperature and high frequency, the electrical performance is still good, but less corona resistance, resistance Creep, fatigue resistance, abrasion resistance, dimensional stability are good. PET ester bond, strong acid, alkali and water vapor decomposition occurs under the action, resistant to organic solvents, good weather resistance. The disadvantage is the slow crystallization rate, forming processing difficulties, high molding temperature, long production cycle, poor impact performance. Generally through the enhancement, filling, blending and other methods to improve its processability and physical properties, to enhance the effect of glass fiber significantly improve the resin rigidity, heat resistance, chemical resistance, electrical properties and weatherability.


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Advantage

1. Have good mechanical properties, impact strength is 3 to 5 times the other films, folding good.

2. Oil, fat-resistant, acid-resistant, dilute alkali, resistant to most solvents.

3. Has excellent high and low temperature performance, long-term use in the temperature range of 120 ℃, short-term use can withstand 150 ℃ high temperature, resistant to -70 ℃ low temperature, and high and low temperature on the mechanical properties of small.

4. Gas and water vapor permeability is low, both excellent gas barrier, water, oil and odor properties.

5. High transparency, can block UV light, good gloss.

6. Non-toxic, tasteless, health and safety, can be used directly in food packaging.




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