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Formula: Polyester, PET, PETP
Form: Granule
Material: Polyethylene terephthalate (PET)
CAS Number: 25038-59-9
Commodity: Polymers
Nominal Granule Size: 3-5mm
Type: Copolymer
Structure: Semi Crystalline
Crystallinity: >50%
Inherent Viscosity: 0.80 dl/g
Additives: maximum 1ppm Acetaldehyde
Color: Natural
Polyethylene Terephthalate (PET) Granules are part of Goodfellow's wide range of plastic products. PET is known for its clarity, toughness, barrier properties and recyclability. With 16 size variations available, our PET granules can be customized for many applications including fibers, food and beverage containers, thermoformed trays, and injection molded parts. The exceptional versatility of PET makes it one of our most in-demand plastic materials.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good-Poor
Acids - dilute Good
Alcohols Good
Alkalis Poor
Aromatic hydrocarbons Good-Fair
Greases and Oils Good
Halogenated Hydrocarbons Good-Poor
Halogens Fair-Poor
Ketones Good-Fair
Mechanical Properties
Element Value
Coefficient of friction 0.2-0.4
Hardness - Rockwell M94-101
Poisson's ratio 0.37-0.44
Tensile modulus( GPa ) 02-Apr
Izod impact strength( J m⁻¹ ) 13-35
Tensile strength( MPa ) 80, for biax film 190-260
Electrical Properties
Element Value
Dielectric constant @1MHz 3
Dissipation factor @ 1kHz 0.002
Dielectric strength( kV mm⁻¹ ) 17
Surface resistivity( Ohm/sq ) 10¹³
Volume resistivity( Ohmcm ) >10¹⁴
Physical Properties
Element Value
Flammability HB
Radiation resistance Good
Refractive index 1.58-1.64
Resistance to Ultra-violet Fair?
Limiting oxygen index( % ) 21
Water absorption - equilibrium( % ) 0.7
Water absorption - over 24 hours( % ) 0.1
Density( gcm⁻³ ) 1.3-1.4
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 115
Heat-deflection temperature - 1.8MPa( C ) 80
Lower working temperature( C ) 20
Upper working temperature( C ) 115-170
Specific heat( J K⁻¹ kg⁻¹ ) 1200-1350
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.15-0.4@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 20-80

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  1. PET Powder Formula: Polyester, PET, PETP
    Maximum Particle Size: 300µm
    Weight: 1000g
    Structure: Semi Crystalline
    Type: Copolymer
    Crystallinity: >50%
    Additives: maximum 1ppm Acetaldehyde
    Inherent Viscosity: 0.80 dl/g
    Colour: Natural
    CAS Number: 25038-59-9
    UOM Code: 127-913-23

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