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Advanced Elastomer Systems Santoprene® 181-55 Thermoplastic Rubber

Subcategory: Elastomer, TPE; Polymer; Thermoplastic

Close Analogs: This grade is no longer a commercial product

Material Notes:
A black thermoplastic medical grade elastomer with good fluid resistance, certified non-toxic by MEM elution test. It has USP Class VI Certificate of Compliance for biocompatibility and can be processed using injection molding, extrusion, blow molding or other melt processing techniques. Drug Master File has been established at US FDA National Center for drugs and biologics.

Key Features: MEM elution cytotoxicity to L-929 mouse fibroblast cells, 72 hr. exposure to rubber extract; NAmSA, MT023-100 test method; test unit, % cell lysis; typical value 0; USP physiochemical test for elastomer closures, heavy metals such as lead; NAmSA, CP020-004 test method; Test unit, ppm; typical value <1

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.

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Physical Properties Metric English Comments

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

Mechanical Properties

Hardness, Shore A 55 55 5 Second; TPE-0169 (ASTM D 2240)

Tensile Strength, Ultimate 4.7 MPa 682 psi TPE-0153 (ASTM D 412)

Elongation at Break 400 % 400 % TPE-0153 (ASTM D 412)

100% Modulus 0.0017 GPa 0.247 ksi TPE-0153 (ASTM D 412)

Graves Tear Strength 22 kN/m 126 pli at 23°C. Value at 100°C is 9 kN/m. TPE-0056 (ASTM D 624)

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

Compression Set, Elevated Temperature 25 % 25 % 100°C, 168 hrs.; TPE-0016 (ASTM D 412)

Tensile Set 6 % 6 % 23°C, 168 hrs.; TPE-0053 (ASTM D 412)

Thermal Properties

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

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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Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistant format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's disclaimer and terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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