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A Brief Introduction To PETG
- Sep 01, 2017 -

PETG is a kind of transparent plastic, is a kind of amorphous copolyester, PETG commonly used copolymer monomer is 1, 4-cyclohexane two methanol (CHDM), all known as polyethylene terephthalate-1, 4-cyclohexane glycol ester. It is made from terephthalic acid (PTA) and ethylene glycol (EG), 1, 4-cyclohexane dimethyl alcohol (CHDM) Three kinds of monomer to polycondensation products, and pet more than 1, 4-cyclohexane two methanol copolymer monomer, and PCT than the ethylene glycol copolymer monomer, therefore, PETG performance and pet, pct big difference , with its uniqueness.

So far, only the United States Eastman, South Korea SK Two companies mature technology, Eastman PETG and South Korea SK PETG and other products domestic main agents have Shanghai United Mold Chemical Co., Ltd. With the increase of CHDM in the copolymer, the melting point decreased, the vitrification temperature increased, the crystallinity decreased, and the amorphous polymers were finally formed. The content of CHDM in general PETG is more suitable in 30%-40%. With good viscosity, transparency, color, chemical resistance, and the ability to resist stress whitening. Can be quickly thermoforming or extrusion blow molding. The viscosity is better than acrylic (acrylic). PETG its products are highly transparent, good toughness, suitable for forming thick-walled transparent products, PETG processing and molding performance is excellent, in accordance with the designer's intention of arbitrary shape design, you can use the traditional extrusion, injection molding, blow molding and blister molding methods, can be widely used in sheet metal, high-performance shrink film, Bottles and profiles and other markets, at the same time its two times processing performance is good, can be conventional machining modification.

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