1.1 This specification2 covers polytetrafluoroethylene (PTFE) prepared by coagulation of a dispersion. These PTFE resins are homopolymers of tetrafluoroethylene or modified homopolymers containing not more than 1 % by weight of other fluoromonomers. The materials covered herein do not include mixtures of PTFE with additives such as colors, fillers, or plasticizers; nor do they include reprocessed or reground resin or any fabricated articles because the properties of such materials have been irreversibly changed when they were fibrillated or sintered.
1.2 The values stated in SI units as detailed in IEEE/ASTM SI-10 are to be regarded as standard. The values given in parentheses are for information only.
1.3 The following safety hazards caveat pertains only to the Specimen Preparation Section, Section 9, and the Test Methods Section, Section 10, 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 Warning note in
9.1.1 for a specific hazards statement. NOTE 1—Information in this specification is technically equivalent to related information in ISO 20568-1 and ISO 20568-2.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D4895-18 Referenced Document
ASTM D1708 Standard Test Method for Tensile Properties of Plastics By Use of Microtensile Specimens
ASTM D1895 Standard Test Methods for Apparent Density, Bulk Factor, and Pourability of Plastic Materials
ASTM D3892 Standard Practice for Packaging/Packing of Plastics
ASTM D4052 Standard Test Method for Density and Relative Density of Liquids by Digital Density Meter
ASTM D4441 Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene
ASTM D4591 Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
ASTM D4894 Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
ASTM D618 Standard Practice for Conditioning Plastics for Testing
ASTM D638 Standard Test Method for Tensile Properties of Plastics
ASTM D792 Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
ASTM D883 Standard Terminology Relating to Plastics
ASTM E11 Standard Specification for Wire Cloth and Sieves for Testing Purposes
ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
ASTM E29 Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
IEEE/ASTM SI 10 American National Standard for Metric Practice
ISO 13322-2 Particle size analysis — Image analysis methods — Part 2: Dynamic image analysis methods
ISO 20568-1 Plastics - Fluoropolymer dispersions and moulding and extrusion materials - Part 1: Designation system and basis for specifications
ISO 20568-2 Plastics - Fluoropolymer dispersions and moulding and extrusion materials - Part 2: Preparation of test specimens and determination of properties
ASTM D4895-18 history
2023ASTM D4895-18(2023) Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
2018ASTM D4895-18 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
2016ASTM D4895-16 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
2015ASTM D4895-15 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
2010ASTM D4895-10 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
2004ASTM D4895-04 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
1998ASTM D4895-98 Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion