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First, understand PCTG
PCTG is a transparent plastic, an amorphous copolyester. The common comonomer of PCTG is 1,4-cyclohexanedimethanol (CHDM), which is called polyethylene terephthalate-1. , 4-cyclohexanedimethanol ester. It is a product of polycondensation of terephthalic acid (PTA), ethylene glycol (EG) and 1,4-cyclohexanedimethanol (CHDM) by transesterification. Compared with PET, 1,4 - Cyclohexane dimethanol comonomer, which 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. As the CHDM in the copolymer increases, 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. It can be quickly thermoformed or extrusion blow molded. Viscosity is better than acrylic (acrylic). PCTG is an amorphous copolyester. Its products are highly transparent and excellent in impact resistance. It is especially suitable for forming thick-walled transparent products. It has excellent processing and forming properties and can be designed in any shape according to the designer's intention. Traditional extrusion, injection molding, blow molding and plastic molding methods can be widely used in the market of sheet, high-performance shrink film, bottle and profile, cosmetic packaging, etc., and its secondary processing performance is excellent and can be carried out. Conventional machining modifications.
Second, the application of PCTG in the cosmetics packaging materials industry
PCTG has glass-like transparency and density close to glass, good gloss, chemical resistance, impact resistance, and easy processing, and can be injection molded, injection stretch blow molding and extrusion blow molding. It also produces unique shapes, looks and special effects such as bright colors, matte, marble texture, metallic sheen and more. It is also possible to use other polyester, elastic plastic or ABS for overmolding plastic molding.
Products include perfume bottles and caps, cosmetic bottles and caps, lipstick tubes, cosmetic cases, deodorant packaging, talcum powder bottles and eyeliner sets. PETG injection products include medical devices such as filters, eustachian tubes, tube connections, pumps, clips, and dialysis equipment. Household utensils such as cups, salad bowls, salt shakers, pepper shakers, etc., have excellent transparency, gloss, good toughness, workability and excellent colorability.
PCTG is a highly transparent copolyester plastic raw material. With high transparency, good toughness and impact strength, excellent low temperature toughness, high tear resistance and good processing properties, excellent chemical resistance. It can be processed by conventional extrusion, injection molding, blow molding and plastic 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; passed the US FDA food contact standards, can be applied to food, medicine, cosmetics packaging And other fields.