• ASTM D 4894 : 2007

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    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    Superseded date:  11-11-2014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:  09-01-2007

    Publisher:  American Society for Testing and Materials

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    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 IEEE/ASTM SI-10 are to be regarded as the standard, and the practices of IEEE/ASTM SI-10 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.

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    Committee D 20
    Document Type Standard
    Product Note Reconfirmed 2007
    Publisher American Society for Testing and Materials
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    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 4441 : 2015 Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene
    ASTM F 1545 : 2015 : REV A Standard Specification for Plastic-Lined Ferrous Metal Pipe, Fittings, and Flanges
    ASTM D 1710 : 2015 Standard Specification for Extruded Polytetrafluoroethylene (PTFE) Rod, Heavy Walled Tubing and Basic Shapes
    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
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