![]() PET is the most widely used polymer in the bottling industry due to its transparency combined with its mechanical and gas barrier properties. Using low mold temperatures, with PET it is possible to obtain transparent moldings without fillers. Crystalline PET (40-50% crystallinity) has excellent mechanical properties and a high heat deformation temperature (comparable to PA6 and PBT), modulus and brilliance.įor this reason it is used in the automotive and engineering polymers sector. Its crystallinity is enhanced by the addition of nucleating agents and crystal growth accelerators. At high temperatures PET is very sensitive to moisture. The following graphic shows a comparison between apparent viscosity recorded with multiple MVR-Multistep tests with a L/D8/2. ![]() Allow some time for material to melt and soften and purge the material up to the. PET (polyethylene terephthalate) has excellent chemical resistance and barrier properties, good solidity, rigidity, wear and abrasion resistance. Depending on how viscosity ( ) changes with shear rate ( ) the flow. It is formed from terephthalic acid and ethyl glycol via the poly-condensation reaction of monomers. Polyethylene terephthalate also known as PET or PETE is a thermoplastic polymer that belongs to the polyester family.
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