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1.1 This test method covers the determination of the extrudability of unvulcanized SBR and NBR rubber compounds through a screw-type extruder equipped with ASTM Extrusion Die, Garvey type. This test method is designed to allow the observation of the appearance and contours of the extrusion. Rating systems are provided along with recipes for compounds of known extrusion characteristics. The utility of the test method for evaluating rubbers or compounding materials other than those listed has not been established. Since extrusion machines differ among laboratories, the procedure includes techniques that minimize differences between machines.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D3182 Practice for RubberMaterials, Equipment, and Procedures for Mixing Standard Compounds and Preparing Standard Vulcanized Sheets
D3185 Test Methods for RubberEvaluation of SBR (Styrene-Butadiene Rubber) Including Mixtures With Oil
D3187 Test Methods for RubberEvaluation of NBR (Acrylonitrile-Butadiene Rubber)
ICS Number Code 83.060 (Rubber)
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ASTM D2230-96(2002), Standard Test Method for Rubber Property-Extrudability of Unvulcanized Compounds, ASTM International, West Conshohocken, PA, 2002, www.astm.orgBack to Top