Polyethylene terephthalate (commonly known as PET in English) is a major type of thermoplastic polyester. It is one of the five major engineering plastics and is also one of the most common types of plastics in daily life (its recycling code is "1").

CAS Number: 25038-59-9

Chemical formula: (C₁₀H₈O₄)ₙ

Appearance: Usually a highly crystalline polymer in a milky white or light yellow color, with a smooth and shiny surface; when not crystallized, it is colorless and transparent.

PET is mainly divided into fiber grade (used for manufacturing polyester fibers) and non-fiber grade (used for bottles, films, engineering plastics, etc.), among which packaging is the fastest-growing application field.

Core parameters

Core advantage

• High cost-effectiveness: Compared to engineering plastics such as PBT, the raw material cost of PET is lower (due to the price advantage of ethylene glycol), and it has extremely high cost-effectiveness.

• Excellent comprehensive performance: Achieved a good balance among rigidity, hardness, heat resistance and electrical insulation.

• Excellent barrier properties: It has excellent barrier effects against gases, water vapor and odors, making it an ideal material for food packaging.

• Safety and environmental protection: Non-toxic, odorless, with excellent hygiene and safety properties, and can be directly used for contact with food and medicine.

Main purpose

The application of PET spans multiple fields such as fibers, packaging, and electronic and electrical products:

Packaging industry:

• Bottles: Bottles for carbonated beverages, mineral water, edible oil, etc. (The most widely known application).

• Films and sheets: Pharmaceutical packaging, plastic trays for electronic components, stationery sheets.

• Special films: Audio-visual tapes, movie films, X-ray films, photographic film substrates.

Electrical Appliances:

• Components: Connectors, relay bases, coil frames, switches, sockets.

• Solderable components: The reinforced PET can withstand a 250℃ solder bath for a short period of time, suitable for manufacturing electronic tuners, electromagnetic stove panels, etc.

Automobile Industry:

• Components: Distribution panel cover, carburetor cover, flow control valve, window controller, ignition coil.

Industry and Daily Life:

• Mechanical parts: gears, cams, pump housings, pulleys.

• Fiber products: Polyester clothing, home textiles, industrial fabrics.

• Others: zippers, wheelchair wheels, medical device parts, etc.