Ryton® / Techtron® / PPS (polyphenylene sulfide) products are among the most dimensionally stable thermoplastics on the market. These products offer the broadest resistance to chemicals of any high performance plastic. They have no known solvents below 392°F, are inert to steam, are compatible with common sterilization techniques, and can be machined to tight tolerances. These materials are also inert to strong bases, fuels and acids, making them perform well in highly corrosive and high temperature environments. Minimal moisture absorption and a very low coefficient of linear thermal expansion along with stress-relieving processes make these PPS products ideally suited for precise-tolerance machined components. In addition, PPS products exhibit excellent electrical characteristics and are inherently flame retardant. PPS is ideally suited for plastic components in automotive, electrical, appliance and and industrial applications. Other trade names for Polyphenylene sulfide products are Estane®, Supec®, Sustatron PPS, and Tecatron®.
| Tectron PPS | 40% Glass-Filled Ryton PPS | 40% Glass-Filled Ryton PPS | |||
| Mechanical | ASTM Test Method | Compression Molded PPS | Compression Molded 40% GF PPS | Injection Molded R-4 | Units |
|---|---|---|---|---|---|
| Strength to Weight Ratio | - | - | - | - | ksi |
| Specific Gravity @73 F | D792 | 1.35 | 1.70 | 1.67 | - |
| Tensile Strength @73 F, (ult)/(yld) | D638 | 10,000 (ult) | 13,000 (ult) | 22,000 (ult) | psi |
| Tensile Modulus of Elasticity @73 F | D638 | 325,000 | 730,000 | 2,200,000 | psi |
| Tensile Elongation at Break @73 F | D638 | 5.0 | 2.0 | 1 | % |
| Flexural Strength @73 F | D790 | 18,000 | 23,000 | 29,500 | psi |
| Flexural Modulus of Elasticity @73 F | D790 | 370,000 | 1,000,000 | 2,100,000 | psi |
| Shear Strength @73 F | D732 | - | - | 13,000 | psi |
| Comprehensive Strength, (% Deformation) @73 F | D695 | 18,000 (10) | 24,000 (10) | 26,000 (10) | psi |
| Comprehensive Modulus of Elasticity @73 F | D695 | 410,000 | 1,300,000 | - | psi |
| Hardness, Rockwell, Scale as noted @73 F | D785 | M93 (R125) | M94 (R125) | (R123) | - |
| Hardness, Durometer, Shore D @73 F | D2240 | D85 | D86 | - | - |
| Izod Impact, (Notched) @73 F | D256 Type A | 0.6 | 1.0 | 1.7 | ft-lb/in of notch |
| Coefficient of Friction, (Dry vs Steel) Dynamic | - | 0.40 | - | - | - |
| Limiting PV, (with 4 to 1 factor of safety applied) | - | - | - | - | psi-ft/min |
| Thermal | ASTM Test Method | Compression Molded PPS | Compression Molded 40% GF PPS | Injection Molded R-4 | Units |
|---|---|---|---|---|---|
| Coefficient of Linear Thermal Expansion @73 F | E-831 (TMA) | 2.8 E-05 | 2.5 E-05 | - | in/in/F |
| Heat Deflection Temperature @264 psi | D648 | 250 | 490 | 500 | F |
| Tg-Glass transition termperature, (Amorphous) | D3418 | - | - | - | F |
| Melting Point, (VS=Vicat Softening Temp.) | D3418 | 540 | 540 | - | F |
| Continuous Service Temperature in Air, (Max.) | - | 425 | 450 | 428 | F |
| Thermal Conductivity | - | 2.00 | 2.10 | 2.10 | BTU-in/hr-ft2-F |
| Electric | ASTM Test Method | Compression Molded PPS | Compression Molded 40% GF PPS | Injection Molded R-4 | Units |
|---|---|---|---|---|---|
| Dielectric Strength, Short Term | D149 | 540 | 385 | 450 | Volts/mil |
| Volume Resistivity | D257 | 4.5 E+16 | - | 1.0 E+16 | ohm-cm |
| Dielectric Constant @10E6 Hz | D150 | 3.0 | - | 3.8 | - |
| Dissipation Factor @10E6 Hz | D150 | 0.001 | - | 0.001 | - |
| Flammability @3.1 mm unless noted | UL94 | V-0 | V-0 | V-0/5VA | - |
| H2O | ASTM Test Method | Compression Molded PPS | Compression Molded 40% GF PPS | Injection Molded R-4 | Units |
|---|---|---|---|---|---|
| Water Absorption, Immersion, 24 hours | D570(7) | 0.01 | 0.02 | - | % by weight |
| Water Absorption, Saturation | D570(7) | 0.03 | 0.03 | 0.05 | % by weight |