1. Understand PCTG
PCTG is a transparent plastic and an amorphous copolyester. The commonly used comonomer of PCTG is 1,4-cyclohexanedimethanol (CHDM), the full name of which is polyethylene terephthalate-1 , 4-cyclohexane dimethanol ester. It is the product of polycondensation by transesterification of three monomers, terephthalic acid (PTA), ethylene glycol (EG) and 1,4-cyclohexanedimethanol (CHDM), which is 1,4 more than PET. -Cyclohexanedimethanol comonomer has more ethylene glycol comonomer than PCT. Therefore, the performance of PCTG is quite different from that of PET and PCT. PCTG is an amorphous copolyester. With the increase of CHDM in the copolymer, the melting point decreases, the glass transition temperature increases, the crystallinity decreases, and finally an amorphous polymer is formed. Generally, the content of CHDM in PCTG is 30%-40%.
Has good viscosity, transparency, color, chemical resistance, and resistance to stress whitening. Quickly thermoformed or extrusion blow molded. Viscosity is better than acrylic (acrylic). PCTG is an amorphous copolyester. Its products are highly transparent and have excellent impact resistance. It is especially suitable for forming thick-walled transparent products. Traditional molding methods such as extrusion, injection molding, blow molding and blister molding can be widely used in the market of sheet materials, high-performance shrink films, bottles and profiles, and cosmetic packaging. Regular machining finishes.
2. Application of PCTG in cosmetic packaging industry
PCTG has glass-like transparency and close to glass density, good gloss, chemical resistance, impact resistance, and easy processing, injection molding, injection stretch blow molding and extrusion blow molding. It can also produce unique shapes, appearances and special effects such as bright colors, frosted, marbled textures, metallic luster, etc. It is also possible to use other polyesters, elastomers or ABS for overmolding.
Products include perfume bottles and caps, cosmetic bottles and caps, lipstick tubes, cosmetic cases, deodorant packaging, talcum powder bottles and eyeliner sets, etc. PETG injection molding products include medical devices such as filters, Eustachian tubes, tube connectors, pumps, clips, and dialysis equipment. Household utensils such as cups, salad bowls, salt shakers, pepper shakers, etc., have excellent transparency, gloss, good toughness, processability and excellent colorability.
PCTG is a highly transparent copolyester plastic raw material. It has high transparency, good toughness and impact strength, excellent low temperature toughness, high tear resistance and good processability, and excellent chemical resistance. It can be processed by traditional extrusion, injection molding, blow molding and blister molding methods. Widely used in sheet, high-performance shrink film, bottle and profile market; can be used to produce toys, household utensils and medical supplies, etc.; passed the US FDA on food contact standards, can be used in food, medicine, cosmetics packaging and other fields.
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