An amorphous ****polyester, with the increase of CHDM in the ****polymer, the melting point decreases, the glass transition temperature rises, the degree of crystallinity decreases, and finally forms an amorphous polymer. Generally the content of CHDM in PETG is more appropriate at 30%-40%. It has better adhesion, transparency, color, chemical resistance, and stress whitening resistance. Can be quickly thermoformed or extrusion blow molding. Viscosity is better than acrylic (acrylic). Its products are highly transparent, excellent impact resistance, especially suitable for molding thick-walled transparent products, its processing and molding performance is excellent, according to the designer's intention to carry out any shape design, you can use the traditional extrusion, injection molding, blow molding and blister molding and other molding methods, it can be widely used in the plate and sheet, high-performance shrink film, bottles, and profiles, such as the market, and at the same time, its secondary processing performance is excellent, and it can carry out the conventional PETG is a kind of amorphous *** polyester, its products are highly transparent, excellent impact resistance, especially suitable for molding thick-walled transparent products, its processing and molding performance is excellent, according to the designer's intention to carry out the design of any shape, can use the traditional extrusion, injection molding, blow molding and blister molding and other molding methods, can be widely used in the plate and sheet, high-performance shrink film, bottles, and profiles, cosmetic packaging, etc. Meanwhile, its secondary processing performance is excellent and can be modified by conventional machining. Eastman PETG and South Korea SKPETG and other products currently the main domestic agents are Shanghai Lianmao Chemical and so on. PET resin is a linear homopolymerized polyester condensed from a diol (ethylene glycol, EG) and a dicarboxylic acid (terephthalic acid, TPA), while ****polyester is a polyester modified with an alcohol or an acid, and there are PETG, PCTG, and PCTA as well as biodegradable ****polyester.
PETG is an amorphous **** polyester. In its production process, crystallization is prevented as a certain amount of ethylene glycol is replaced by 1,4-cyclohexane dimethanol (CHDM), which in turn improves processing and manufacturing and transparency. Its products are highly transparent, with excellent impact resistance, especially suitable for molding thick-walled transparent products. Its processing and molding performance is excellent, capable of any shape according to the designer's intention, and may be used in traditional extrusion, injection molding, blow molding and blister molding, etc. It can be widely used in the markets of sheet, plate, high-performance shrinkable film, bottles, and profiles, etc., and at the same time its secondary processing performance is excellent, and it is possible to carry out conventional It also has excellent secondary processing performance and can be modified by conventional machining. Outstanding Thermoforming Performance
PETG sheet is easy to produce products with complex shapes and large tensile ratios. Moreover, unlike PC sheet and impact-modified acrylic, this sheet does not require pre-drying before thermoforming. Compared with PC sheet or acrylic, it has a shorter molding cycle, lower temperatures, and a higher yield.
Toughness
PETG sheet extrusions are typically 15 to 20 times tougher than general-purpose acrylic, and 5 to 10 times tougher than impact-modified acrylic.PETG sheet has sufficient holding capacity to help prevent rupture during processing, transportation and use.
Weatherability
PETG sheet offers excellent weatherability. It maintains the toughness of the product and prevents yellowing. It contains UV absorbers that ****extrude into a protective layer that protects the sheet from the harmful effects of UV rays.
Easy processing
PETG sheet can be sawed, die cut, drilled, punched, sheared, riveted, milled and cold bent without breaking. Minor surface scratches can be eliminated with a hot air gun. Solvent bonding is also a routine operation. It is easier to process than general-purpose acrylic, impact-modified acrylic or PC board, and can be flocked, plated, electrostatic and other processing treatments.
Excellent chemical resistance
PETG sheet is resistant to a wide range of chemicals as well as commonly used cleaning agents.
Environmentally friendly
PETG sheet substrates are all environmentally friendly and meet food contact management requirements.
Economic
It is cheaper than PC sheet and more durable than acrylic. (1)Plate and sheet
Using conventional molding methods, it can be prepared 1~25.4mm thick transparent material with outstanding toughness and high impact strength, its impact strength is 3~10 times that of modified polyacrylate type, excellent molding performance, no whitening in cold bending, no cracks, easy to print and retouching, it is widely used in indoor and outdoor signboards, storage racks, and panels of vending machines, Furniture, construction and machinery baffles, etc.
PCTG cards are mainly used in Europe, but are also increasingly used in North America and Asia. The reason is that it has a wide processing range, high mechanical strength and excellent flexibility, higher transparency than PVC, good gloss, easy to print and has the advantage of environmental protection.
PETG materials are used in credit cards. Visa Inc. is one of the world's largest credit card companies, with 580 million cards issued worldwide in 1998. The company has endorsed diol-modified polyester (PETG) as its credit card material. PETG is an alternative to PVC in countries where card materials are required to be more environmentally friendly. Visa also notes that results from three different test plants show that PETG meets all the requirements of the international standard for credit cards (150/IEC7810), so PETG cards are likely to be widely used here.
(2) Profiles
Can be molded into tubes or various profiles, and its products are hard, transparent, with good luster, not whitening under pressure, easy to mold and post-processing treatment, meet environmental requirements, and also comply with the U.S. FDA standards on food contact, and are widely used in architectural decoration and materials.
Film: Specialized in the application of high-performance shrink film, there is greater than 70% shrinkage, can be made into a complex shape container packaging, with high plastic absorption, high transparency, high gloss, low haze, easy to print, not easy to fall off, storage of natural shrinkage rate is low, applied to beverage bottles, food and chemical; mausoleum products shrink wrap and shrink labels for electronic products and so on. One of the bi-directional stretch. PETG film is suitable for high-grade packaging, printing, electronics and electrical appliances, cable wrapping, insulation and a variety of industrial areas of high-quality substrates. Unidirectional stretch PET, heat shrinkable film is suitable for a variety of cans, polyester bottles, a variety of containers and other external labels. Compared with PVC shrink film, PETG shrink film also has the advantage of environmental protection.
Bottle: improve the traditional polyester beverage bottles with low toughness shortcomings, especially suitable for the manufacture of large-capacity, thick-walled transparent containers, highly transparent, unbreakable, easy to surface modification, to meet the U.S. FDA on food contact standards, can be applied to food and medical products and other fields. In the beer plastic packaging, EASTMAN company for the Asahi company produced a new environmentally friendly plastic packaging beer bottles, is Eastal *** polyester film for sealing packaging materials, its shape is silver and black, supplemented by black holes in the neck with a black hole banded pull-ring closure, which can block the light, isolate the air, to ensure the quality of the beer, and with the rupture of the bottle to prevent debris from splintering explosion-proof features, shrinkage Excellent shrinkage performance. Since Asahi adopted this packaging material, sales of Super Dry and Dunk beers have increased dramatically.
(3)Cosmetic Packaging
PETG has glass-like transparency and density close to glass, good gloss, chemical resistance, impact resistance, and easy processing, can be injection molding, injection pull blow molding and extrusion blow molding. It is also capable of producing unique shapes, appearances and special effects, such as bright colors, frosting, marbling, metallic luster and so on. And it can also be molded by overlapping injection molding with other polyesters, elastomers or ABS.
Products include perfume bottles and caps, cosmetic bottles and caps, lipstick tubes, make-up cases, deodorant packaging, talcum powder bottles, and eyeliner sets, etc. PETG injection molded products include medical devices such as filters, eustachian tubes, tubing connectors, pumps, clips, and dialysis equipment. Household utensils such as cups, salad bowls, salt shakers, pepper shakers, etc., with excellent transparency, gloss, good toughness, processability and excellent colorability.