PET plastic sheet (polyethylene terephthalate sheet) is a thermoplastic engineering plastic sheet made of polyethylene terephthalate (PET) as the base material. PET is a linear saturated polyester synthesized by polycondensation of terephthalic acid (PTA) and ethylene glycol (EG). Its molecular chain contains rigid benzene rings and flexible ester bond structures, which give the material excellent mechanical strength, dimensional stability, chemical resistance and transparency.
Good chemical resistance (resistant to weak acids, weak bases and most organic solvents)
Application areas
Packaging industry
(1) Food and beverage packaging
Beverage bottles: PET is the world's most important beverage bottle material (accounting for more than 30% of global PET consumption). Its high transparency, chemical resistance and gas barrier properties (oxygen permeability of about 50-100 cm³/(m²·day·atm)) can keep beverages fresh.
(2) Industrial packaging
Plastic pallets/logistics turnover boxes: High strength + chemical corrosion resistance, suitable for the transportation of chemical raw materials and electronic components (service life > 5 years).
Electronics and electrical appliances
(1) Insulating components
Circuit breaker housing, terminal block: high voltage insulation (CTI value ≥ 600V, surface resistance > 10¹²Ω), in line with IEC 60695 flame retardant standard.
Connectors and sockets: high dimensional stability + wear resistance (friction coefficient 0.3-0.5), suitable for 5G base stations, server internal connectors.
(2) Optics and displays
Light guide plate: optical grade PET sheet (thickness 1-3mm) diffuses LED light evenly through microstructure design (such as dot printing), used for liquid crystal display (LCD) backlight module.
Capacitive touch screen cover: improve scratch resistance through surface hardening treatment (such as hard coating, hardness ≥ 4H pencil), and replace glass for smartphones and tablets.
Architecture and decoration
(1) Building lighting and decoration
Roof lighting panels: light transmittance 85%-90% (5%-10% lower than PC lighting panels but only 1/3 of the cost), suitable for simple factories and greenhouses.
Interior decorative panels: matte surface (60-80 GU gloss) + flame retardant (UL94 V-0) properties, used for office buildings and shopping mall walls.
(2) Doors, windows and partitions
Energy-saving window frames: The heat deformation temperature of modified PET (such as PETG) is increased to 80-100℃, which is used for passive house door and window frames (thermal insulation performance U value <1.5 W/(m²·K)).
Bathroom partitions: antibacterial grade PET (added with silver ions) with surface resistance <10⁹Ω, used in hospital and hotel bathrooms.
Automobiles and Transportation
(1) Automotive Interior Parts
Dashboard frame, door panel: high rigidity + low water absorption (dimensional stability is better than PP), in line with automotive VOC (volatile organic compound) emission standards.
Seat rail cover: wear resistance (wear loss 0.05-0.1 mm³) + sweat corrosion resistance (pH 4-8), suitable for lightweight design of electric vehicles.
(2) Headlights and Optical Components
Headlight reflector: reflectivity is improved by electroplating (silver layer thickness 5-10 μm) or vacuum aluminum plating (>95%), used for headlights and fog lights.
HUD (Head Up Display) protective cover: optical grade PET (birefringence Δn<0.001) + anti-ultraviolet coating to reduce imaging distortion.