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Advanced Elastomer Systems Santoprene® 121-58 W175 Thermoplastic Rubber

Subcategory: Elastomer, TPE; Polymer; Thermoplastic

Material Notes:
A black thermoplastic UV grade elastomer with good fluid resistance, formulated to replace thermoset elastomers such as EPDM, polychloroprene, and chlorosulfonated polyethylene. It can be processed using injection molding, extrusion (especially thin-wall), blow molding or other melt processing techniques.

Key Features: Dielectric constant 2.3, dielectric strength at 3.17 mm (125 mil), 19.6 kV/mm (500 v/mil); Flame resistant HB material; Continuous temperature rating 1000 hrs. @ 135°C (275°F); Excellent flex fatigue resistance; Excellent ozone resistance; Excellent UV resistance; Extrudes thin sections with excellent definition (down to 0.33 mm [1.3"] radius). Long runs with minimal build-up of material on screen packs or narrow die sections.

Additional processing comments: This thermoplastic rubber is a shear-dependent material that can be processed on conventional thermoplastic equipment for injection molding, extrusion, or blow molding. For extrusion, a general purpose screw with a compression ratio of 2.5 to 3.0 is recommended. Material can be recycled. SANTOPRENE rubber is incompatible with acetal and PVC.

Values below are for injection molded plaques, side gated, 82.6 mm x 117.5 mm x 3.0 mm. Tensile properties measured across flow. Data provided by Advanced Elastomer Systems.

Physical Properties Metric English Comments

Density 0.97 g/cc 0.035 lb/in³ TPE-0105 (ASTM D792)

Mechanical Properties

Hardness, Shore A 58 58 5 Second; TPE-0169 (ASTM D 2240)

Tensile Strength, Ultimate 5 MPa 725 psi TPE-0153 (ASTM D 412)

Elongation at Break 365 % 365 % TPE-0153 (ASTM D 412)

100% Modulus 0.0021 GPa 0.305 ksi TPE-0153 (ASTM D 412)

Graves Tear Strength 19 kN/m 108 pli at 23°C. Value at 100°C is 7.3 kN/m. TPE-0056 (ASTM D 624)

Compression Set 23 % 23 % 23°C, 168 hrs.; TPE-0016 (ASTM D 412)

Compression Set, Elevated Temperature 28 % 28 % 100°C, 168 hrs.; TPE-0016 (ASTM D 412)

Tensile Set 8 % 8 % 23°C, 168 hrs.; TPE-0053 (ASTM D 412)

Electrical Properties

Dielectric Constant 2.3 2.3 Frequency not specified

Dielectric Strength 19.6 kV/mm 498 kV/in at 3.17 mm (0.125 in)

Thermal Properties

Maximum Service Temperature, Air 135 °C 275 °F Continuous temperature Rating, 1000 hours

Brittleness Temperature Max -60 °C Max -76 °F TPE-0089 (ASTM D 746)

Flammability, UL94 HB HB

Processing Properties

Processing Temperature 177 - 232 °C 351 - 450 °F

Drying Temperature 82 °C 180 °F Desiccant drying for 3 hours recommended

Dry Time 3 hour 3 hour

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