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ASTM D2230-96(2012)

Historical Reaffirmation

Standard Test Method for Rubber Property—Extrudability of Unvulcanized Compounds

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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.

One objective in the extrusion of rubber compounds is to obtain a smooth extrusion that closely reproduces the contours of the extrusion die. This test method provides for a subjective determination of this under controlled conditions. As the rating is subjective, it does not lend itself readily to incorporation as a specification requirement. It does not measure other aspects of extrudability such as rate of extrusion or die swell in a quantitative manner.

SDO ASTM: ASTM International
Document Number D2230
Publication Date May 1, 2012
Language en - English
Page Count 5
Revision Level 96(2012)
Supercedes
Committee D11.12
Publish Date Document Id Type View
Oct. 1, 2017 D2230-17E01 Revision
Oct. 1, 2017 D2230-17 Revision
Dec. 10, 2002 D2230-96R02E01 Revision
Sept. 28, 1999 D2230-96E01 Revision
Oct. 1, 2022 D2230-17R22 Reaffirmation
May 1, 2012 D2230-96R12 Reaffirmation
May 1, 2007 D2230-96R07 Reaffirmation
Dec. 10, 2002 D2230-96R02 Reaffirmation