ASTM D4895-16

Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion

ABSTRACT
This specification covers dry-powder resins of polytetrafluoroethylene (PTFE) resin produced from dispersion. PTFE mixtures with additives are not covered in this specification. This specification covers type I and type II PTFE. The resins shall be tested for bulk density, particle size, water content, melting peak temperature, tensile strength, elongation at break, standard specific gravity, extrusion pressure, thermal instability index, and stretching void index. Specimen preparation, testing, inspection, and packaging shall be in accordance to the procedures indicated in this specification.
SCOPE
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 12086-1 and ISO 12086-2.

General Information

• Status: Historical
• Publication Date: 30-Apr-2016
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaces: ASTM D4895-15 - Standard Specification for Polytetrafluoroethylene (PTFE) Resin Produced From Dispersion
• Effective Date: 01-May-2016
• Referred By: ASTM D8507-23 - Standard Specification for High Load Multi-Rotational Disc Bearings for Bridges and Structures
• Effective Date: 01-May-2016
• Referred By: ASTM D4894-19 - Standard Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
• Effective Date: 01-May-2016
• Referred By: ASTM F1545-15a(2021) - Standard Specification for Plastic-Lined Ferrous Metal Pipe, Fittings, and Flanges
• Effective Date: 01-May-2016
• Referred By: ASTM D2902-21 - Standard Specification for Fluoropolymer Resin Heat-Shrinkable Tubing for Electrical Insulation
• Effective Date: 01-May-2016
• Referred By: ASTM D1430-22 - Standard Classification System for Polychlorotrifluoroethylene (PCTFE) Plastics
• Effective Date: 01-May-2016
• Referred By: ASTM D3295-20 - Standard Specification for PTFE Tubing, Miniature Beading and Spiral Cut Tubing
• Effective Date: 01-May-2016
• Referred By: ASTM D4591-22 - Standard Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
• Effective Date: 01-May-2016
• Referred By: ASTM D5675-13(2018) - Standard Classification for Low Molecular Weight PTFE and FEP Micronized Powders
• Effective Date: 01-May-2016
• Referred By: ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
• Effective Date: 01-May-2016
• Referred By: ASTM D1675-18 - Standard Test Methods for Polytetrafluoroethylene Tubing
• Effective Date: 01-May-2016
• Referred By: ASTM D4441-20 - Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene
• Effective Date: 01-May-2016

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D4895 −16
Standard Specification for
Polytetrafluoroethylene (PTFE) Resin Produced From
1
Dispersion
This standard is issued under the fixed designation D4895; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* D638 Test Method for Tensile Properties of Plastics
2 D792 Test Methods for Density and Specific Gravity (Rela-
1.1 This specification covers polytetrafluoroethylene
tive Density) of Plastics by Displacement
(PTFE) prepared by coagulation of a dispersion. These PTFE
D883 Terminology Relating to Plastics
resins are homopolymers of tetrafluoroethylene or modified
D1708 Test Method forTensile Properties of Plastics by Use
homopolymers containing not more than 1 % by weight of
of Microtensile Specimens
other fluoromonomers. The materials covered herein do not
D1895 Test Methods forApparent Density, Bulk Factor, and
include mixtures of PTFE with additives such as colors, fillers,
Pourability of Plastic Materials
or plasticizers; nor do they include reprocessed or reground
D3892 Practice for Packaging/Packing of Plastics
resin or any fabricated articles because the properties of such
D4052 Test Method for Density, Relative Density, and API
materials have been irreversibly changed when they were
Gravity of Liquids by Digital Density Meter
fibrillated or sintered.
D4441 Specification for Aqueous Dispersions of Polytetra-
1.2 The values stated in SI units as detailed in IEEE/ASTM
fluoroethylene
SI-10 are to be regarded as standard. The values given in
D4591 Test Method for Determining Temperatures and
parentheses are for information only.
Heats of Transitions of Fluoropolymers by Differential
Scanning Calorimetry
1.3 The following safety hazards caveat pertains only to the
SpecimenPreparationSection,Section9,andtheTestMethods D4894 Specification for Polytetrafluoroethylene (PTFE)
Granular Molding and Ram Extrusion Materials
Section, Section 10, of this specification: This standard does
not purport to address all of the safety concerns, if any, E11 Specification for Woven Wire Test Sieve Cloth and Test
associated with its use. It is the responsibility of the user of this Sieves
E29 Practice for Using Significant Digits in Test Data to
standard to establish appropriate safety and health practices
and determine the applicability of regulatory limitations prior Determine Conformance with Specifications
E177 Practice for Use of the Terms Precision and Bias in
to use. See Warning note in 9.1.1 for a specific hazards
statement. ASTM Test Methods
IEEE/ASTM SI-10 Use of the International System of Units
NOTE 1—Information in this specification is technically equivalent to
(SI): The Modern Metric System
related information in ISO 12086-1 and ISO 12086-2.
4
2.2 ISO Standards:
2. Referenced Documents ISO 12086-1 Plastics Fluoropolymer Dispersions and Mold-
3 ing and Extrusion Materials—Part 1: Designation and
2.1 ASTM Standards:
Specification
D618 Practice for Conditioning Plastics for Testing
ISO 12086-2 Plastics Fluoropolymer Dispersions and
Molding and Extrusion Materials—Part 2: Preparation of
1
This specification is under the jurisdiction of ASTM Committee D20 on Test Specimens and Determination of Properties
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
ISO 13322-2 Particle size analysis—Image analysis
Materials.
methods—Part 2: Dynamic image analysis methods
Current edition approved May 1, 2016. Published May 2016. Originally
approved in 1989. Last previous edition approved in 2015 as D4895 - 15. DOI:
3. Terminology
10.1520/D4895-16.
2
Specifications for other forms of polytetrafluoroethylene are found in Specifi-
3.1 Definitions—The definitions given in Terminology
cations D4441 and D4894.
D883 are applicable to this specification.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4895−16
3.2 Definitions of Terms Specific to This Standard: and elongation. Each type of resin is divided into grades in
3.2.1 bulk density, n—the mass in gra
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D4895 − 15 D4895 − 16
Standard Specification for
Polytetrafluoroethylene (PTFE) Resin Produced From
1
Dispersion
This standard is issued under the fixed designation D4895; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
2
1.1 This specification covers polytetrafluoroethylene (PTFE) prepared by coagulation of thea 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 12086-1 and ISO 12086-2.
2. Referenced Documents
3
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1708 Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens
D1895 Test Methods for Apparent Density, Bulk Factor, and Pourability of Plastic Materials
D3892 Practice for Packaging/Packing of Plastics
D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter
D4441 Specification for Aqueous Dispersions of Polytetrafluoroethylene
D4591 Test Method for Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning
Calorimetry
D4894 Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
IEEE/ASTM SI-10 Use of the International System of Units (SI): The Modern Metric System
4
2.2 ISO Standards:
ISO 12086-1 Plastics Fluoropolymer Dispersions and Molding and Extrusion Materials—Part 1: Designation and Specification
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.
Current edition approved May 1, 2015May 1, 2016. Published June 2015May 2016. Originally approved in 1989. Last previous edition approved in 20102015 as
D4895 - 10.D4895 - 15. DOI: 10.1520/D4895-15.10.1520/D4895-16.
2
Specifications for other forms of polytetrafluoroethylene are found in Specifications D4441 and D4894.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4895 − 16
ISO 12086-2 Plastics Fluoropolymer Dispersions and Molding and Extrusion Materials—Part 2: Preparation of Test Specimens
and Determination of Properties
I
...