The introduction of PETG copolyester

PETG, English full name Poly real ( ethyleneterephthalateco- 1, 4 - cylclohexylenedimethylene terephthalate) , it is a kind of transparent, non-crystalline type copolyester, PETG copolymerization monomer 1, 4 - in common use Cyclohexane two methanol ( CHDM，Cylclohexylenedimethylene) , called the polyethylene terephthalate - 1, 4 - Cyclohexane 2 methyl ester. It is made of terephthalic acid ( TPA) And glycol ( 如) And 1, 4 - Cyclohexane two methanol ( CHDM) The product of three kinds of monomers by ester exchange method of polycondensation, for more than 1, 4 - compared with PET Cyclohexane two methanol copolymerization monomer, and PCT more than glycol monomer, therefore, the performance of the PETG and PET, PCT. PETG sheet outstanding toughness and high impact strength, the impact strength is modified polyacrylic ester 3 ~ 10 times, and has wide working range, high mechanical strength and excellent flexibility, compared with PVC high transparency, good gloss, easy to printing and environmental protection advantages. PETG in essence is a kind of transparent plastic, is a kind of an amorphous type copolyester, PETG copolymerization monomer 1, 4 - in common use Cyclohexane two methanol ( CHDM) , called the polyethylene terephthalate - 1, 4 - Cyclohexane 2 methyl ester. It is made of terephthalic acid ( PTA) And ethylene glycol ( 如) , 1, 4 - Cyclohexane two methanol ( CHDM) The product of three kinds of monomers for polycondensation, for more than 1, 4 - compared with PET Cyclohexane two methanol copolymerization monomer, and PCT more than glycol monomer, as a result, the performance of the PETG and PET, PCT is very different, has its uniqueness. So far only the United States Eastman, South Korea SK two companies technology is mature, Eastman PETG and South Korea SK PETG and other products of domestic main agent has Shanghai united mould chemical co. , LTD. , etc. With the increase of CHDM in the copolymer, the drop melting point, glass transition temperature rise, crystallinity decreased, the final formation of amorphous polymers. General PETG CHDM content at 30% 40% more appropriate. Has good viscosity, transparency, color, resistant to chemicals, and the ability to resist stress whitening. Can quickly heat molding or extrusion blow molding. Viscosity ratio of acrylic ( Acrylic) Good. PETG its products highly transparent, good toughness, suitable for forming of thick wall transparent products, processing and shaping PETG performance is good, can be carried out in accordance with the intention of the designers of any shape design, can use the traditional extrusion, injection molding, blow molding, blister, molding method, can be widely applied in the plate sheet, high-performance shrinkable film, bottles and profiles etc in the market, at the same time, the second time processing performance is good, can undertake conventional machining. A product profile of the PETG PET resin is made up of glycol ( Ethylene glycol, EG) With dibasic acid ( Terephthalic acid, TPA) Polycondensation linear homopolymerization polyester, and copolymerization of polyester made with alcohol or acid modified polyester, PETG, PCTG and PCTA and biodegradable copolymer polyester. PETG is a noncrystalline copolyesters. In the process of its production, was 1, 4 - with a certain number of ethylene glycol cyclohexanedimethanol( CHDM) Replaced, and can prevent crystallization, and then improve the processing and manufacturing and transparency. Its products are highly transparent, excellent impact resistance, especially suitable for thick wall molding transparent products, processing and shaping its excellent performance and can be carried out in accordance with the intention of the designers of any shape design, may adopt the traditional extrusion, injection molding, blow molding, blister, molding method, can be widely used in high-performance shrinkable film, plate, sheet, bottle and profiles etc in the market, at the same time, the second time processing performance is good, can be modified conventional machining. PETG main features: thermoforming properties of PETG sheet is easy to produce complex modelling and draw ratio big products. Moreover, with the impact modifiers for PC board and the force that press a gram, the plate does not need to dry processing before the hot forming process. Compared with the PC board or the force that press a gram, the molding cycle is short, low temperature, the yield is higher. Toughness of PETG sheet extrusion sheet usually 15 to 20 times more than general acrylic toughness, impact modifiers for than the force that press a gram of fortitude 5 to 10 times. PETG sheet in processing, transportation and use process has enough capacity, to help prevent rupture. Weatherability PETG sheet provides excellent weatherability. It can keep the product toughness, prevent yellowing. It contains uv absorber, co-extrusion into a protective layer, to protect the sheet from the harmful effects of ultraviolet light. Easy processing PETG sheet can be cutting, die cutting, drilling, punching, cutting, riveting, edge milling and cold bending, not broken. Minor scratches on the surface of the available heat gun to remove. The solvent adhesive is also normal operation. Impact modifiers for it than general acrylic, acrylic or PC board easier processing, and can be flocking, electroplating, electrostatic and other processing. Excellent chemical resistance PETG sheet can tolerate a variety of chemicals and cleaners. Environmental protection PETG sheet base material are environmental protection material, conform to the requirements of the food contact management. Economy it is much cheaper than the PC board, the force that press a gram durable.