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ASTM D4570-02(2007)

Historical Reaffirmation

Standard Test Method for Rubber Chemicals—Determination of Particle Size of Sulfur by Sieving (Dry)

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1.1 This test method covers the particle size measurement of the coarse fraction of ground sulfurs. It is limited to measurement of particles greater than 45 μm (No. 325 sieve). If the sulfur is very fine and the screens become plugged by the caking of the sulfur, it may be necessary to use a wet sieve procedure instead.

1.2 The values stated in SI units are to be regarded as the standard.

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.

This test method is used to evaluate sulfur for suitability as a rubber vulcanizing agent. Sulfur particles must be small enough to dissolve in rubber during cure to produce a uniform network of cross-links. This test method is used as a quality control method to ensure that large particles are not present (and to determine if the sulfur follows a typical pattern for size distribution).

SDO ASTM: ASTM International
Document Number D4570
Publication Date Nov. 1, 2007
Language en - English
Page Count 2
Revision Level 02(2007)
Supercedes
Committee D11.20
Publish Date Document Id Type View
Dec. 10, 2002 D4570-02 Revision
Nov. 1, 2021 D4570-02R21 Reaffirmation
Feb. 1, 2017 D4570-02R17 Reaffirmation
May 1, 2012 D4570-02R12 Reaffirmation
Nov. 1, 2007 D4570-02R07 Reaffirmation
May 10, 1998 D4570-86R98 Reaffirmation