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ASTM D4745-11a

Historical Revision

Standard Classification System and Basis for Specification for Filled Polytetrafluoroethlyene (PTFE) Molding and Extrusion Materials Using ASTM Methods

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1.1 This specification covers polytetrafluoroethylene (PTFE) filled molding compounds made with virgin PTFE resins defined in Specification D4894, as Types II and III.

Note 1—This specification can be used as a model for other PTFE compounds having particulate fillers that can survive the sintering temperatures of PTFE as can those listed in this specification. This specification is restricted to virgin PTFE base resin for technical reasons. Recycled or reprocessed material cannot be processed successfully.

Note 2—The properties measured on commercially fabricated parts may differ from the listed values for samples prepared by the procedures given in this specification, depending on part geometry and processing parameters.

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

1.3 The following statement applies to the test method portion, Section 11, of this specification: 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. See Note 5 for a specific warning statement.

Note 3—There is no known ISO equivalent to this standard.


This specification covers polytetrafluoroethylene(PTFE) filled molding compounds made with virgin PTFE resins defined in a certain specification except Types I, IV, V, and VI. PTFE compounds are classified into two types which are Type I as the nonpelletized material use for general purpose compression molding and Type II as the pelletized or free-flowing material use for molding, automatic molding or ram extrusion. Each type is further classified into thirteen grades distinguished by the nature of the filler. Different tests shall be conducted in order to determine the following properties: filler content, bulk density, specific gravity, and tensile properties.


SDO ASTM: ASTM International
Document Number D4745
Publication Date Dec. 1, 2011
Language en - English
Page Count 6
Revision Level 11a
Supercedes
Committee D20.15
Publish Date Document Id Type View
May 1, 2019 D4745-19 Revision
Aug. 1, 2014 D4745-14 Revision
Dec. 1, 2011 D4745-11AE01 Revision
Dec. 1, 2011 D4745-11A Revision
Feb. 1, 2011 D4745-11 Revision
Nov. 1, 2008 D4745-08 Revision
Dec. 1, 2006 D4745-06 Revision
Nov. 10, 2001 D4745-97 Revision
Nov. 10, 2001 D4745-01 Revision
May 1, 2024 D4745-19R24 Reaffirmation