ASTM D3294-22

Standard Specification for Polytetrafluoroethylene (PTFE) Resin Molded Sheet and Molded Basic Shapes

ABSTRACT
This specification establishes the requirements and test methods for the material, dimensions, and workmanship, and the physical and electrical properties of molded sheet manufactured from polytetrafluoroethylene (PTFE) resin molding materials and molded basic shapes made from resin molding and extrusion materials. The sheet or molded basic shape shall be made from unpigmented PTFE and shall be free from foreign matters. Each of the samples shall undergo visual and dimensional inspection to verify their compliance with the standard requirements. The specimens shall conform to the following physical and electrical property requirements: tensile strength; elongation; dielectric strength; specific gravity; porosity; and melting point. Examination for internal defects shall also be conducted to ensure that the specimens are free from microscopic cracks, voids, inclusions, and other surface defects that might affect the serviceability of the materials.
SCOPE
1.1 This specification establishes requirements and methods of test for the material, dimensions, and workmanship, and the physical and electrical properties of molded sheet in minimum thicknesses of 0.794 mm (1/32 in.) manufactured from PTFE resin molding materials defined in Specification D4894.  
1.2 This specification also establishes requirements for molded basic shapes made from molding materials. This specification is for products 300 mm (12 in.) or less in a dimension parallel to and 12.7 mm (0.5 in.) or greater in the dimension perpendicular to the direction of the applied molding pressure.  
1.3 The values stated in SI units are to be regarded as the standard.  
1.4 The following precautionary caveat pertains only to the test method portion, Section 7, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Special attention is called to 13.2, 13.3, 13.6, 13.8, and A1.  
Note 1: There is no known ISO equivalent to this standard.  
1.5 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.

General Information

• Status: Published
• Publication Date: 30-Jun-2022
• ICS: 83.140.99 - Other rubber and plastics products
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Standards Content (Sample)

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.
Designation:D3294 −22
Standard Specification for
Polytetrafluoroethylene (PTFE) Resin Molded Sheet and
1
Molded Basic Shapes
This standard is issued under the fixed designation D3294; 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.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification establishes requirements and methods
D149 Test Method for Dielectric Breakdown Voltage and
of test for the material, dimensions, and workmanship, and the
DielectricStrengthofSolidElectricalInsulatingMaterials
physical and electrical properties of molded sheet in minimum
1
at Commercial Power Frequencies
thicknesses of 0.794 mm ( ⁄32 in.) manufactured from PTFE
D374/D374M Test Methods for Thickness of Solid Electri-
resin molding materials defined in Specification D4894.
cal Insulation
1.2 This specification also establishes requirements for
D618 Practice for Conditioning Plastics for Testing
molded basic shapes made from molding materials. This
D638 Test Method for Tensile Properties of Plastics
specification is for products 300 mm (12 in.) or less in a
D792 Test Methods for Density and Specific Gravity (Rela-
dimension parallel to and 12.7 mm (0.5 in.) or greater in the
tive Density) of Plastics by Displacement
dimension perpendicular to the direction of the applied mold-
D883 Terminology Relating to Plastics
ing pressure.
D1600 Terminology forAbbreviatedTerms Relating to Plas-
tics
1.3 The values stated in SI units are to be regarded as the
D1708 Test Method forTensile Properties of Plastics by Use
standard.
of Microtensile Specimens
1.4 The following precautionary caveat pertains only to the
D3892 Practice for Packaging/Packing of Plastics
test method portion, Section 7, of this specification. This
D4591 Test Method for Determining Temperatures and
standard does not purport to address all of the safety concerns,
Heats of Transitions of Fluoropolymers by Differential
if any, associated with its use. It is the responsibility of the user
Scanning Calorimetry
of this standard to establish appropriate safety, health, and
D4894 Specification for Polytetrafluoroethylene (PTFE)
environmental practices and determine the applicability of
Granular Molding and Ram Extrusion Materials
regulatory limitations prior to use.Specialattentioniscalledto
D5947 Test Methods for Physical Dimensions of Solid
13.2, 13.3, 13.6, 13.8, and A1.
Plastics Specimens
E94/E94M Guide for Radiographic Examination Using In-
NOTE 1—There is no known ISO equivalent to this standard.
dustrial Radiographic Film
1.5 This international standard was developed in accor-
IEEE/ASTM SI-10 American National Standard for Use of
dance with internationally recognized principles on standard-
theInternationalSystemofUnits(SI):TheModernMetric
ization established in the Decision on Principles for the
System
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
3. Terminology
Barriers to Trade (TBT) Committee.
3.1 Definitions:
3.1.1 Definitions are in accordance with Terminology D883
unless otherwise specified.
1
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
2
Materials (Section D20.15.12). For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved July 1, 2022. Published July 2022. Originally approved contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
in 1974. Last previous edition approved in 2015 as D3294 - 15. DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
D3294-22. the ASTM website.
*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 ----------------------
D3294−22
3.1.2 lot, n—one continuous production run or a uniform 5. Ordering Information
blend of two or more production runs of one size sheet or
5.1 The molded sheet or basic shapes covered in this
molded basic shape.
specification shall be ordered stating the type, grade, and class
3.2 Abbreviations: and that they meet the requirements of this specification.
3.2.1 Abbreviations are in accordance with Terminology
D1600. 6. Materials
6.1 The sheet or molded basic shape from Types I, II, III, or
4. Classification
IV
...

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: D3294 − 15 D3294 − 22
Standard Specification for
Polytetrafluoroethylene (PTFE) Resin Molded Sheet and
1
Molded Basic Shapes
This standard is issued under the fixed designation D3294; 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.
1. Scope*
1.1 This specification establishes requirements and methods of test for the material, dimensions, and workmanship, and the
1
physical and electrical properties of molded sheet in minimum thicknesses of 0.794 mm ( ⁄32 in.) manufactured from PTFE resin
molding materials defined in Specification D4894.
1.2 This specification also establishes requirements for molded basic shapes made from molding materials. This specification is
for products 300 mm (12 in.) or less in a dimension parallel to and 12.7 mm (0.5 in.) or greater in the dimension perpendicular
to the direction of the applied molding pressure.
1.3 The values stated in SI units are to be regarded as the standard.
1.4 The following precautionary caveat pertains only to the test method portion, Section 7, 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 safety, health, and healthenvironmental practices and determine the applicability of
regulatory limitations prior to use. Special attention is called to 13.2, 13.3, 13.6, 13.8, and A1.
NOTE 1—There is no known ISO equivalent to this standard.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at
Commercial Power Frequencies
D374D374/D374M Test Methods for Thickness of Solid Electrical Insulation (Metric) D0374_D0374M
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
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
(Section D20.15.12).
Current edition approved Sept. 1, 2015July 1, 2022. Published September 2015July 2022. Originally approved in 1974. Last previous edition approved in 20092015 as
D3294 - 09.D3294 - 15. DOI: 10.1520/D3294-15.10.1520/D3294-22.
2
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.
*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 ----------------------
D3294 − 22
D1600 Terminology for Abbreviated Terms Relating to Plastics
D1708 Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens
D3892 Practice for Packaging/Packing of Plastics
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
D5947 Test Methods for Physical Dimensions of Solid Plastics Specimens
E94E94/E94M Guide for Radiographic Examination Using Industrial Radiographic Film
IEEE/ASTM SI-10 American National Standard for Use of the International System of Units (SI): The Modern Metric System
3. Terminology
3.1 Definitions:
3.1.1 Definitions are in accordance with Terminology D883 unless otherwise specified.
3.1.2 lot, n—one continuous production run or a uniform blend of two or more production runs of one size sheet or molded basic
shape.
3.2 Abbreviations:
3.2.1 Abbreviations are in accordance with Terminology D1600.
4. Classification
4.1 This specification covers the fo
...