ASTM D4894

Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials

active, Most Current
Buy Now
Organization: ASTM
Publication Date: 1 May 2015
Status: active
Page Count: 14
ICS Code (Thermoplastic materials): 83.080.20
scope:

This specification covers granular resins and test methods for polytetrafluoroethylene (PTFE) that have never been preformed or molded and are normally processed by methods similar to those used in powder metallurgy or ceramics, or by special extrusion processes. These PTFE resins are homopolymers of tetrafluoroethylene, or, in some cases, modified homopolymers containing not more than one percent by weight of other fluoromonomers. The usual methods of processing thermoplastics generally are not applicable to these materials because of their viscoelastic properties at processing temperatures. The materials included herein do not include mixtures of PTFE resin with additives such as colorants, fillers or plasticizers; nor do they include reprocessed or reground resin or any fabricated articles. The methods and properties included are those required to identify the various types of resins. Additional procedures are provided in the Appendix for further characterization of the resins. 

The values stated in SI units as detailed in IEEE/ASTM SI-10 are to be regarded as the standard, and the practices of IEEE/ASTM SI-10 are incorporated herein. 

The following precautionary caveat pertains only to the Specimen Preparation section, Section 9, and the Test Methods section, Section 10, of this specification: This specification 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 Notes 3 and 9 for specific cautionary statements.

NOTE 1-Information in this specification is technically equivalent to related information in ISO 12086-1 and ISO 12086-2.

*A Summary of Changes section appears at the end of this standard

Document History

ASTM D4894
May 1, 2015
Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
This specification covers granular resins and test methods for polytetrafluoroethylene (PTFE) that have never been preformed or molded and are normally processed by methods similar to those used in...
September 1, 2007
Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
A description is not available for this item.
September 1, 2007
Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
This specification covers granular resins and test methods for polytetrafluoroethylene (PTFE) that have never been preformed or molded and are normally processed by methods similar to those used in...
February 1, 2004
Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
(Footnote *) This specification covers granular resins and test methods for polytetrafluoroethylene (PTFE) that have never been preformed or molded and are normally processed by methods similar to...
November 10, 1998
Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
1. Scope 1.1 This specification covers granular resins and test methods for polytetrafluoroethylene (PTFE) that have never been preformed or molded and are normally processed by methods similar to...
April 10, 1997
Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
A description is not available for this item.
January 1, 1994
Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
A description is not available for this item.
July 15, 1991
STANDARD SPECIFICATION FOR POLYTETRAFLUOROETHYLENE (PTFE) GRANULAR MOLDING AND RAM EXTRUSION MATERIALS
A description is not available for this item.
March 15, 1991
STANDARD SPECIFICATION FOR POLYTETRAFLUOROETHYLENE (PTFE) GRANULAR MOLDING AND RAM EXTRUSION MATERIALS
A description is not available for this item.
January 27, 1989
STANDARD SPECIFICATION FOR POLYTETRAFLUOROETHYLENE (PTFE) GRANULAR MATERIALS
A description is not available for this item.

References

Advertisement