Orientated PET is made by stretching PET sheet after extruding the material into a sheet. It is semicrystalline thermoplastic polyester derived from polyethylene terephthalate. Mylar is cloudy in appearance while Melinex is clear. Its excellent wear resistance, low coefficient of friction, high flexural modulus, and superior dimensional stability make it a versatile material for designing mechanical and electro-mechanical parts. Available only up to .014 inch thick it is widely used where designers need
- Excellent wear resistance
- Low coefficient of friction
- Very good chemical resistance
- Good electrical insulator
- High mechanical strength
- Excellent hardness and stiffness
- Low water absorption
- Good resistance to high-energy radiation
Go To Our Catalog To Find A Standard Size Washer And Request A Quote
| Properties | Condition | Value | Test Method | Comment | ||
|---|---|---|---|---|---|---|
| Mechanical | Modulus of elasticity (tensile test) | 470,000 | psi | ASTM D 638 | ||
| Tensile strength at yield | @ 73°F | 13000 | psi | ASTM D 638 | ||
| Elongation at break | @ 73°F | 20 | % | ASTM D 638 | ||
| Flexural strength | @ 73°F | 19000 | psi | ASTM D 790 | ||
| Modulus of elasticity (flexural test) | @ 73°F | 500,000 | psi | ASTM D 790 | ||
| Impact strength (Izod) | @ 73°F | 0.70 | ft-lbs/in | ASTM D 256 | ||
| Rockwell hardness | M Scale, @ 73°F | 101 | ASTM D 785 | |||
| Coefficient of friction | Dynamic, 40 psi, 50 fpm | 0.25 | % | ASTM D 3702 1) | 1) Injection molded specimen | |
| Coefficient of friction | Static | 0.19 | % | ASTM D 3702 1) | ||
| Wear rate | Against Steel, 40 psi, 50 fpm | 210*10-10 | in3-min/ft-lbs-hr | ASTM D 3702 1) | ||
| Thermal | Melting temperature | 490 | °F | 2) | 2) Per ASTM D3418 | |
| Heat distortion temperature | @ 264 psi | 175 | °F | ASTM D 648 | ||
| Heat distortion temperature | @ 66 psi | 240 | °F | ASTM D 648 | ||
| Service temperature | Long Term | 230 | °F | – | ||
| Service temperature | Intermittent | 320 | °F | – | ||
| Thermal expansion (CLTE) | 3.9*105 | in/in/°F | ASTM D 696 | |||
| Specific heat | 0.28 | BTU/ln-F° | – | |||
| Thermal conductivity | 2.01 | BTU-in/hr-ft2-°F | – | |||
| Electrical | Volume resistivity | 1015 | Ω*cm | ASTM D 257 3) | 3) Injection molded specimen | |
| Dielectric strength | 400 | V/mil | ASTM D 149 3) | |||
| Dissipation factor | @ 60 Hz, 73°F | 0.002 | % | ASTM D 150 3) | ||
| Dielectric constant | @ 60 Hz, 73°F, 50% RH | 3.4 | % | ASTM D 150 3) | ||
| Other | Moisture absorption | @ 24 hours, 73°F | 0.10 | % | ASTM D 570 | |
| Moisture absorption | @ saturation, 73°F | 0.50 | % | ASTM D 570 | ||
| Flammability (UL94) | HB | % | 4) | 4) Estimated | ||
| This information is only to assist and advise you on current technical knowledge and is given without obligation or liability. All trade and patent rights should be observed. All rights reserved. Data obtained from extruded shapes material. | ||||||
Mechanical
Property: Modulus of elasticity (tensile test)
Condition: –
Value: 470,000 psi
Test Method: ASTM D 638
Comment: –
Property: Tensile strength at yield
Condition: @ 73°F
Value: 13000 psi
Test Method: ASTM D 638
Comment: –
Property: Elongation at break
Condition: @ 73°F
Value: 20 %
Test Method: ASTM D 638
Comment: –
Property: Flexural strength
Condition: @ 73°F
Value: 19000 psi
Test Method: ASTM D 790
Comment: –
Property: Modulus of elasticity (flexural test)
Condition: @ 73°F
Value: 500,000 psi
Test Method: ASTM D 790
Comment: –
Property: Impact strength (Izod)
Condition: @ 73°F
Value: 0.70 ft-lbs/in
Test Method: ASTM D 256
Comment: –
Property: Rockwell hardness
Condition: M Scale, @ 73°F
Value: 101 –
Test Method: ASTM D 785
Comment: –
Property: Coefficient of friction
Condition: Dynamic, 40 psi, 50 fpm
Value: 0.25 %
Test Method: ASTM D 3702 1)
Comment: 1) Injection molded specimen
Property: Coefficient of friction
Condition: Static
Value: 0.19 %
Test Method: ASTM D 3702 1)
Comment: –
Property: Wear rate
Condition: Against Steel, 40 psi, 50 fpm
Value: 210*10-10 in3-min/ft-lbs-hr
Test Method: ASTM D 3702 1)
Comment: –
Thermal
Property: Melting temperature
Condition: –
Value: 490 °F
Test Method: 2)
Comment: 2) Per ASTM D3418
Property: Heat distortion temperature
Condition: @ 264 psi
Value: 175 °F
Test Method: ASTM D 648
Comment: –
Property: Heat distortion temperature
Condition: @ 66 psi
Value: 240 °F
Test Method: ASTM D 648
Comment: –
Property: Service temperature
Condition: Long Term
Value: 230 °F
Test Method: –
Comment: –
Property: Service temperature
Condition: Intermittent
Value: 320 °F
Test Method: –
Comment: –
Property: Thermal expansion (CLTE)
Condition: –
Value: 3.9*105 in/in/°F
Test Method: ASTM D 696
Comment: –
Property: Specific heat
Condition: –
Value: 0.28 BTU/ln-F°
Test Method: –
Comment: –
Property: Thermal conductivity
Condition: –
Value: 2.01 BTU-in/hr-ft2-°F
Test Method: –
Comment: –
Electrical
Property: Volume resistivity
Condition: –
Value: 1015 Ω*cm
Test Method: ASTM D 257 3)
Comment: 3) Injection molded specimen
Property: Dielectric strength
Condition: –
Value: 400 V/mil
Test Method: ASTM D 149 3)
Comment: –
Property: Dissipation factor
Condition: @ 60 Hz, 73°F
Value: 0.002 %
Test Method: ASTM D 150 3)
Comment: –
Property: Dielectric constant
Condition: @ 60 Hz, 73°F, 50% RH
Value: 3.4 %
Test Method: ASTM D 150 3)
Comment: –
Other
Property: Moisture absorption
Condition: @ 24 hours, 73°F
Value: 0.10 %
Test Method: ASTM D 570
Comment: –
Property: Moisture absorption
Condition: @ saturation, 73°F
Value: 0.50 %
Test Method: ASTM D 570
Comment: –
Property: Flammability (UL94)
Condition: –
Value: HB %
Test Method: 4)
Comment: 4) Estimated
This information is only to assist and advise you on current technical knowledge and is given without obligation or liability. All trade and patent rights should be observed. All rights reserved. Data obtained from extruded shapes material.