Wednesday, January 20, 2010

PET Polyethylene terephthalate

Widely used thermoplastic material eg beverage bottles, and food trays for microwave.
PET are made from ethylene glycol and either terephthalic acid or dimethyl ester of terephthalic acid .
Most uses for PET requires the material molecular structure to be oriented. Orientation of PET will significantly increased the tensile strength and reduces gas permeability and water vapor transimission.
PET is processed by blow moulding and sheet extrusion
typical trade name:
-Cleartuf, Traytuf (goodyear tire and co)
-melinar( ICI america)
-Tenite, Kodapak(eastman )
-selar( du pont)

crisper, a synthetic paper of Toyobo of sanyo is pearlescent PET film having excellent printability and good wear and UV resistance
Spectar PETG, of eastman chemical products is an extruable copolyester for thick (0.5'') sheet. Impact strength is superior to acrylic
Rynite CR, of Du pont contain non metallic conductive ingredients for superior electrical and thermal conductivity, heat dissipation and electronmagnetic shielding.

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