In its molecular structure, polyethylene terephthalate (PET) is available either as an amorphous or semi-crystalline thermoplastic. Whereas the amorphous type is highly transparent and has a lower mechanical strength, it has substantially inferior sliding characteristics than the semi-crystalline type.  Semi-crystalline types have higher hardness, rigidity, and strength with outstanding sliding behavior and low sliding wear (compared to POM in damp or dry environments). 
Due to its good creep strength, low moisture absorption and outstanding dimensional stability, PET is extremely well-suited for applications where complex parts and the highest requirements regarding dimensional accuracy and surface quality are needed. 
— high strength
—  high rigidity and hardness
— very low moisture absorption
— very low creep resistance
— very high dimensional stability
— low sliding friction and sliding wear
— resistant to hydrolysis (up to +70 °C)
— not suitable for contact with media containing >50% alcohol
— good adhesion and welding ability                         
—Wide temperature range with excellent physical and mechanical properties, long-term use of temperature up to 120 ℃                                                                                       —MARPET has ester bond, which will have some decomposition under the action of a strong acid, strong alkali and water vapors. It is resistance to organic solvent and has good weatherability.                                                       —With good electrical insulation, even under the high temperature and high frequency, its electric performance is good, but the corona resistance and fatigue resistance are not as good.
Product information
Acronym: PET
Designation: Polyethylene terephthalate
Type of polymer: Thermoplastic

Technical data sheet
Display of the physical, mechanical, electrical and thermal properties of the engineering plastic Marpet.

Material safety data sheet
Listing of safety relevant information about the engineering plastic Marpet.

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