Ficha Técnica
PET (unfilled, semi-crystalline)
General information
Designation
Polyethylene Terephthalate (unfilled, semi-crystalline)
Tradenames
Arnite, Astapet, Bapolene, Certene, Cleartuf, Eastar, Kopet, Laser+, Lighter, Lofex, Marpol, Mylar, Octal, Papet, Polyclear, Preformance, Ramapet, Relpet, Selar, Skyrol, Surespec, Texpet, Traytuf, Tripet, Umapet, Valox, World, Xcel
Typical uses
Electrical fittings and connectors, audio/visual tapes, industrial strapping, capacitor film, fibers.
Composition overview
Compositional summary
(CO-(C6H4)-CO-O-(CH2)2-O)n
Material family Plastic (thermoplastic, semi-crystalline)
Base material PET (Polyethylene terephthalate)
Polymer code PET
Composition detail (polymers and natural materials)
Polymer 100 %
Price
Price * 0,888 - 1,15 EUR/kg
Price per unit volume * 1,22e3 - 1,61e3 EUR/m^3
Physical properties
Density 1,37e3 - 1,4e3 kg/m^3
Mechanical properties
Young's modulus 2,76 - 3,1 GPa
Specific stiffness 1,99 - 2,24 MN.m/kg
Yield strength (elastic limit) * 65 - 70 MPa
Tensile strength 70 - 75 MPa
Specific strength * 46,9 - 50,6 kN.m/kg
Elongation 65 - 75 % strain
Compressive modulus * 2,76 - 4,14 GPa
Compressive strength * 75,8 - 103 MPa
Flexural modulus 2,99 - 3,09 GPa
Flexural strength (modulus of rupture) * 70 - 75 MPa
Shear modulus * 0,994 - 1,49 GPa
Bulk modulus * 4,94 - 5,19 GPa
Poisson's ratio * 0,381 - 0,396
Shape factor 4,9
Hardness - Vickers * 17 - 20 HV
Hardness - Rockwell M 82 - 87
Hardness - Rockwell R 120 - 125
Elastic stored energy (springs) * 709 - 853 kJ/m^3
Fatigue strength at 10^7 cycles * 19,3 - 29 MPa
Impact & fracture properties
Fracture toughness * 4,75 - 5,25 MPa.m^0.5
Toughness (G) 7,62 - 9,54 kJ/m^2
Impact strength, notched 23 °C 2,86 - 3,15 kJ/m^2
Impact strength, unnotched 23 °C 590 - 600 kJ/m^2
Thermal properties
Melting point 255 - 265 °C
Glass temperature 68 - 80 °C
Heat deflection temperature 0.45MPa 105 - 115 °C
Heat deflection temperature 1.8MPa 70 - 80 °C
Maximum service temperature 115 - 120 °C
Minimum service temperature * -58 - -38 °C
Thermal conductivity 0,138 - 0,151 W/m.°C
Specific heat capacity 1,1e3 - 1,2e3 J/kg.°C
Thermal expansion coefficient 75 - 80 µstrain/°C
Thermal shock resistance * 276 - 321 °C
Thermal distortion resistance * 0,00176 - 0,00197 MW/m
Electrical properties
Electrical resistivity 3,3e20 - 3e21 µohm.cm
Electrical conductivity 5,75e-20 - 5,22e-19 %IACS
Dielectric constant (relative permittivity) 3,5 - 3,7
Dissipation factor (dielectric loss tangent) * 0,002 - 0,003
Dielectric strength (dielectric breakdown) 16,5 - 18 MV/m
Comparative tracking index 200 - 325 V
Magnetic properties
Magnetic type Non-magnetic
Optical, aesthetic and acoustic properties
Refractive index 1,57 - 1,58
Transparency Opaque
Acoustic velocity 1,41e3 - 1,5e3 m/s
Mechanical loss coefficient (tan delta) * 0,00966 - 0,0145
Healthcare & food
Food contact Yes
Restricted substances risk indicators
RoHS (EU) compliant grades? True
REACH Candidate List indicator (0-1, 1 = high risk) 0,02
Notes
May contain restricted (wt%): UV-stabilizer up to 2%
SIN List indicator (0-1, 1 = high risk) 0,03
Notes
May contain restricted (wt%): Anti-oxidant up to 1%, UV-stabilizer up to 2%
Critical materials risk
Contains >5wt% critical elements? No
Absorption & permeability
Water absorption @ 24 hrs 0,1 - 0,2 %
Water vapor transmission 0,464 - 0,707 g.mm/m².day
Permeability (O2) 1,2 - 2,77 cm³.mm/m².day.atm
Processing properties
Polymer injection molding Acceptable
Polymer extrusion Limited use
Polymer thermoforming Limited use
Linear mold shrinkage 1,5 - 1,7 %
Melt temperature 260 - 280 °C
Mold temperature 125 - 145 °C
Molding pressure range 13,8 - 48,1 MPa
Durability
Water (fresh) Excellent
Water (salt) Excellent
Weak acids Acceptable
Strong acids Unacceptable
Weak alkalis Acceptable
Strong alkalis Limited use
Organic solvents Limited use
Oxidation at 500C Unacceptable
UV radiation (sunlight) Fair
Flammability Highly flammable
Primary production energy, CO2 and water
Embodied energy, primary production 78,4 - 86,4 MJ/kg
Sources
59.4 MJ/kg (Patel, 2003); 74.2 MJ/kg (Franklin Associates, 2010); 77 MJ/kg (Shen and Patel, 2008); 78.2 MJ/kg (Song, Youn, Gutowski, 2009); 78.8 MJ/kg (Thiriez and Gutowski, 2006); 82.8 MJ/kg (Habersatter et al., 1996); 89.2 MJ/kg (Hammond and Jones, 2008); 96 MJ/kg (Song, Youn, Gutowski, 2009); 110 MJ/kg (Hammond and Jones, 2008); 78.4 MJ/kg (Ecoinvent v2.2)
CO2 footprint, primary production 2,59 - 2,86 kg/kg
Sources
2.75 kg/kg (Franklin Associates, 2010); 2.7 kg/kg (Ecoinvent v2.2)
Water usage * 126 - 140 l/kg
Processing energy, CO2 footprint & water
Polymer extrusion energy * 5,8 - 6,42 MJ/kg
Polymer extrusion CO2 * 0,435 - 0,481 kg/kg
Polymer extrusion water * 4,82 - 7,23 l/kg
Polymer molding energy * 18,2 - 20,1 MJ/kg
Polymer molding CO2 * 1,36 - 1,51 kg/kg
Polymer molding water * 12,4 - 18,6 l/kg
Coarse machining energy (per unit wt removed) * 1,08 - 1,19 MJ/kg
Coarse machining CO2 (per unit wt removed) * 0,0811 - 0,0896 kg/kg
Fine machining energy (per unit wt removed) * 6,54 - 7,22 MJ/kg
Fine machining CO2 (per unit wt removed) * 0,49 - 0,542 kg/kg
Grinding energy (per unit wt removed) * 12,6 - 13,9 MJ/kg
Grinding CO2 (per unit wt removed) * 0,945 - 1,04 kg/kg
Recycling and end of life
Recycle False
Embodied energy, recycling * 26,8 - 29,6 MJ/kg
CO2 footprint, recycling * 1,45 - 1,6 kg/kg
Recycle fraction in current supply 20 - 22,1 %
Downcycle True
Combust for energy recovery False
Heat of combustion (net) * 23 - 24,2 MJ/kg
Combustion CO2 * 2,24 - 2,35 kg/kg
Landfill True
Biodegrade False
Geo-economic data for principal component
Principal component PET
Annual world production, principal component 1,88e7 tonne/yr
Reserves, principal component 1,23e8 - 1,35e8 tonne
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