Like Tecafine PP, stamped washers and parts made from HDPE and LDPE have excellent resistance to acids and bases, and while their upper service temperature is not as good as PP, the low temperature toughness is notebly better. Washers and spacers from these materials work well in outdoor service applications. Markets like winter sporting goods, building and construction, and refridgerator components value the low temperature impacts. LDPE will have better stress crack resistance then HDPE.
- Broad chemical compatibility
- Easy to machine
- Good impact strength
- Low moisture absorption
| Properties | Condition | Value | Test Method | Comment | ||
|---|---|---|---|---|---|---|
| Mechanical | Modulus of elasticity (tensile test) | @ 73°F | 130,000 | psi | ASTM D 638 | |
| Tensile strength at break | @ 73°F | 4,700 | psi | ASTM D 638 | ||
| Elongation at break | @ 73°F | 100 | % | ASTM D 638 | ||
| Flexural strength | @ 73°F | 6,000-8,000 | psi | ASTM D 790 | ||
| Modulus of elasticity (flexural test) | @ 73°F | 180,000 | psi | ASTM D 790 | ||
| Notched impact strength (Izod) | @ 73°F | 0.9 | ft-lbs/in | ASTM D 256 | ||
| Rockwell hardness | R Scale | 90 | ASTM D 785 | |||
| Thermal | Melting temperature | 330 | °F | 1) | 1) Per ASTM D3418 | |
| Deflection temperature | @ 264 psi | 130 | °F | ASTM D 648 | ||
| Thermal expansion (CLTE) | 5*10-5 | in/in/°F | ASTM D 696 | |||
| Electrical | Volume resistivity | @ 73°F | 1*1017 | Ω*cm | ASTM D 257 | |
| Dielectric constant | @ 60 Hz, 73°F, 50% RH | 2.2 | ASTM D 150 | |||
| Other | Moisture absorption | @ 24 hours, 73°F | 0.01-0.03 | % | ASTM D 570 | |
| Flammability (UL94) | HB | – | ||||
| 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. TECAFINE ™ PP – Ensinger Industries, Inc. |
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