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ASTM D 4894 : 2007 : R2012

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

04-01-2012

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 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.

1.2 The values stated in SI units as detailed in are to be regarded as the standard, and the practices of are incorporated herein.

1.3 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.

Committee
D 20
DocumentType
Standard
Pages
14
ProductNote
Reconfirmed 2012
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM D 4591 : 2017 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D 3308 : 2012 : R2017 Standard Specification for PTFE Resin Skived Tape
ASTM D 3294 : 2015 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Molded Sheet and Molded Basic Shapes
ASTM D 3295 : 2015 Standard Specification for PTFE Tubing, Miniature Beading and Spiral Cut Tubing
ASTM G 74 : 2013 Standard Test Method for Ignition Sensitivity of Nonmetallic Materials and Components by Gaseous Fluid Impact
ASTM F 1545 : 2015 : REV A Standard Specification for Plastic-Lined Ferrous Metal Pipe, Fittings, and Flanges
ASTM D 4000 : 2016 Standard Classification System for Specifying Plastic Materials
ASTM D 6867 : 2003 : R2014 Standard Specification for Perfluoroalkoxy (PFA)-Fluoropolymer Tubing
ASTM F 754 : 2008 : R2015 Standard Specification for Implantable Polytetrafluoroethylene (PTFE) Sheet, Tube, and Rod Shapes Fabricated from Granular Molding Powders
ASTM D 4895 : 2018 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
ASTM D 4745 : 2019 Standard Classification System and Basis for Specification for Filled Polytetrafluoroethlyene (PTFE) Molding and Extrusion Materials Using ASTM Methods
ASTM D 1710 : 2015 Standard Specification for Extruded Polytetrafluoroethylene (PTFE) Rod, Heavy Walled Tubing and Basic Shapes
ASTM D 4441 : 2015 Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene

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