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Polyethylene Terephthalate (PET)
Polyethylene Terephthalate (PET)
A versatile thermoplastic polymer known for its clarity, strength, and barrier properties, widely used in packaging and textile applications
Key Properties
Physical Properties
- Density: 1.35-1.40 g/cm³
- Melting Point: 250-260°C
- Tensile Strength: 50-70 MPa
- Elongation at Break: 50-200%
Chemical Properties
- Chemical Resistance: Excellent
- Water Absorption: Very Low
- Gas Barrier: Excellent (O₂, CO₂)
- Transparency: High (85-90%)
PET Variants
Bottle Grade PET
High clarity PET specifically designed for beverage and food containers with excellent barrier properties.
Processing Methods: Injection stretch blow molding (ISBM, two-stage preform + blow process)
Properties: High clarity, impact strength, food-safe, recyclable
Applications: Bottles for water, soft drinks, oils, sauces, and dairy products
Film Grade PET (BOPET)
Biaxially oriented PET film with exceptional mechanical and barrier properties for flexible packaging applications.
Processing Methods: Extrusion followed by biaxial orientation
Properties: High tensile strength, excellent barrier to gases and moisture, printable and heat-stable
Applications: Flexible packaging films, insulation films, photo films, laminates.
Fiber / Yarn Grade PET
High tenacity PET specifically designed for textile applications with excellent durability properties.
Processing Methods: Melt spinning → drawing → texturizing
Properties: High tenacity, abrasion resistance, wrinkle resistance, and color retention
Applications: Textile yarns, apparel, furnishings, industrial fibers.
Engineering Grade PET (Glass-Filled / Reinforced)
Reinforced PET with enhanced mechanical properties for demanding industrial applications.
Processing Methods: Injection Molding
Properties: High dimensional stability, rigidity, and heat resistance (up to 180°C with glass fiber reinforcement)
Applications: Automotive components, electrical connectors, mechanical housings, gears, and pump parts
PETG (Polyethylene Terephthalate Glycol-Modified)
Amorphous, tough, and optically clear PET variant with excellent thermoforming characteristics.
Processing Methods: Extrusion, Injection molding, thermoforming
Properties: Amorphous (non-crystalline), easy to thermoform, impact resistant, optically clear
Applications: Medical trays, cosmetic packaging, 3D printing filaments, display materials, and signage
rPET (Recycled Polyethylene Terephthalate)
Environmentally sustainable recycled PET with properties comparable to virgin PET.
Processing Methods: Injection stretch blow molding (ISBM, two-stage preform + blow process)
Properties: Sustainable alternative with reduced carbon footprint.
Applications: Bottles, sheets, fibers, strapping, and sustainable packaging solutions
PET Variants Synopsis
| Grade / Type | Processing Methods | Key Properties | Typical Applications |
|---|---|---|---|
| Bottle Grade PET | Injection stretch blow molding (ISBM, two-stage preform + blow process) | High clarity, impact strength, food-safe, recyclable | Bottles for water, soft drinks, oils, sauces, and dairy products |
| Film Grade PET (BOPET) | Extrusion followed by biaxial orientation | High tensile strength, excellent barrier to gases and moisture, printable and heat-stable | Flexible packaging films, insulation films, photo films, laminates, and labels |
| Fiber / Yarn Grade PET | Melt spinning → drawing → texturizing | High tenacity, abrasion resistance, wrinkle resistance, and color retention | Textile yarns, apparel, furnishings, industrial fibers, and tire cords |
| Engineering Grade PET (Glass-Filled / Reinforced) | Injection Molding | High dimensional stability, rigidity, and heat resistance (up to 180°C with glass fiber reinforcement) | Automotive components, electrical connectors, mechanical housings, gears, and pump parts |
| PETG (Polyethylene Terephthalate Glycol-Modified) | Extrusion, Injection molding, thermoforming | Amorphous (non-crystalline), easy to thermoform, impact resistant, optically clear | Medical trays, cosmetic packaging, 3D printing filaments, display materials, and signage |
| rPET (Recycled Polyethylene Terephthalate) | Injection stretch blow molding (ISBM, two-stage preform + blow process) | Sustainable alternative with reduced carbon footprint; maintains clarity and strength with optimized processing | Bottles, sheets, fibers, strapping, and sustainable packaging solutions |
