PET聚酯瓶片CZ-318 328 333 (CAS No.None)

Product Name:PET bottle-grade resin (CZ-318/CZ-328/CZ-333)

English Name:PET bottle-grade resin (CZ-318/CZ-328/CZ-333)

CAS No.:25038-59-9

Aliases:Polyethylene terephthalate, PET resin, Terylene resin, Poly(ethylene terephthalate) plastic

Molecular Formula:(C10H8O4)n

Physical Properties:It is a milky white or light yellow highly crystalline polymer with a smooth and glossy surface. Density approx. 1.38 g/cm³, melting point approx. 250–260°C, glass transition temperature approx. 70–80°C. It has good creep resistance, excellent friction resistance, low abrasion and high hardness, with the toughness typical of thermoplastics. It exhibits good electrical insulation, little affected by temperature, but poor corona resistance. It has good weather resistance, chemical stability and low water absorption, and is resistant to weak acids and organic solvents, but not resistant to hot water immersion or alkalis.

Uses:Mainly used for making drinking water bottles (pure water, natural mineral water, distilled water), carbonated beverage bottles, edible oil bottles, liquor bottles, medicine bottles, condiment bottles and candy bottles, as well as PET sheets and 3-gallon/5-gallon large-format bottles.

Technical Specifications:

Injection molding temperature: nozzle 280–295°C, front section 270–275°C, middle section 265–275°C, rear section 250–270°C.

Mold temperature 30–85°C, back pressure 5–15 kg.

Drying conditions: drying temperature 120–140°C, drying time 2–5 hours, barrel temperature 240–280°C.

Film-grade processing: extrusion temperature approx. 280°C; longitudinal stretching preheating at 86–87°C with stretch ratio approx. 3; transverse stretching preheating at 98–100°C with stretch ratio 2.5–4.0; heat setting temperature 230–240°C.