ASTM D3294-09

Standard Specification for 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.
1.2 This specification also establishes requirements for molded basic shapes made from molding and extrusion 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 and health 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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2009
• ICS: 83.140.99 - Other rubber and plastics products
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaces: ASTM D3294-03 - Standard Specification for PTFE Resin Molded Sheet and Molded Basic Shapes
• Effective Date: 01-Nov-2009
• Referred By: ASTM F336-02(2023) - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
• Effective Date: 01-Nov-2009
• Referred By: ASTM F754-08(2015) - Standard Specification for Implantable Polytetrafluoroethylene (PTFE) Sheet, Tube, and Rod Shapes Fabricated from Granular Molding Powders
• Effective Date: 01-Nov-2009
• Referred By: ASTM F1511-18(2023) - Standard Specification for Mechanical Seals for Shipboard Pump Applications
• Effective Date: 01-Nov-2009

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:D3294 −09
StandardSpecification 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* D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This specification establishes requirements and methods
D883 Terminology Relating to Plastics
of test for the material, dimensions, and workmanship, and the
D1600 Terminology forAbbreviatedTerms Relating to Plas-
physical and electrical properties of molded sheet in minimum
tics
1
thicknesses of 0.794 mm ( ⁄32 in.) manufactured from PTFE
D1708 Test Method forTensile Properties of Plastics by Use
resin molding materials.
of Microtensile Specimens
1.2 This specification also establishes requirements for
D3892 Practice for Packaging/Packing of Plastics
molded basic shapes made from molding and extrusion mate-
D4591 Test Method for Determining Temperatures and
rials. This specification is for products 300 mm (12 in.) or less
Heats of Transitions of Fluoropolymers by Differential
in a dimension parallel to and 12.7 mm (0.5 in.) or greater in
Scanning Calorimetry
the dimension perpendicular to the direction of the applied
E94 Guide for Radiographic Examination
molding pressure.
IEEE/ASTM SI-10 American National Standard for Use of
theInternationalSystemofUnits(SI):TheModernMetric
1.3 The values stated in SI units are to be regarded as the
standard. System
1.4 The following precautionary caveat pertains only to the
3. Terminology
test method portion, Section 7, of this specification.This
3.1 Definitions:
standard does not purport to address all of the safety concerns,
3.1.1 Definitions are in accordance with Terminology D883
if any, associated with its use. It is the responsibility of the user
unless otherwise specified.
of this standard to establish appropriate safety and health
3.1.2 lot, n—one continuous production run or a uniform
practices and determine the applicability of regulatory limita-
blend of two or more production runs of one size sheet or
tions prior to use.Special attention is called to 13.2, 13.3, 13.6,
molded basic shape.
13.8, and A1.
3.2 Abbreviations:
NOTE 1—There is no known ISO equivalent to this standard.
3.2.1 Abbreviations are in accordance with Terminology
D1600.
2. Referenced Documents
2
2.1 ASTM Standards:
4. Classification
D149 Test Method for Dielectric Breakdown Voltage and
4.1 This specification covers the following four types of
DielectricStrengthofSolidElectricalInsulatingMaterials
molded basic sheets and shapes:
at Commercial Power Frequencies
4.1.1 Type I—Premium; normally used for exacting
D618 Practice for Conditioning Plastics for Testing
electrical, mechanical, or chemical applications.
D638 Test Method for Tensile Properties of Plastics
4.1.2 Type II—General purpose; for electrical, mechanical,
and chemical applications not requiring premium material.
4.1.3 Type III—Mechanical Grade; for non-critical
1
This specification is under the jurisdiction of ASTM Committee D20 on
chemical, electrical, and mechanical applications.
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
Materials (Section D20.15.12).
4.1.4 Type IV—Utility; having no electrical requirements
Current edition approved Nov. 1, 2009. Published December 2009. Originally
and with mechanical properties at a lower level.
approved in 1974. Last previous edition approved in 2003 as D3294 - 03. DOI:
10.1520/D3294-09.
4.2 Types I, II, and III shall be subdivided into two grades
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
as follows:
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4.2.1 Grade 1—made only from virgin resin.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.2.2 Grade 2—made using reprocessed resin.
*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 ----------------------
D3294−09
A
TABLE 1 Physical and Electrical Requirements for PTFE Sheets
4.3 The grades shall be further subdivided into three classes
Dielectric
as follows:
Tensile Elonga-
C
B
Specific
Strength D
A A
Types Strength tion (min) Porosity
4.3.1 Class A—resistant to thermal dimensional change not
Gravity
(min) Volts
(min) psi Percent
Per Mill
exceeding 0.5 %.
E
I 4500 300 600 2.15 to 2.18 Zero penetration
4.3
...

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:D3294–03 Designation: D3294 – 09
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.]in.) manufactured from PTFE
resin molding materials.
1.2 This specification also establishes requirements for molded basic shapes made from resin molding and extrusion materials.
This specification is for products 300 mm [12 in.](12 in.) or less in a dimension parallel to and 12.7 mm [0.5 in.](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 and health 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.
NOTE1—There is no similar or equivalent ISO standard. 1—There is no known ISO equivalent to this standard.
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
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
3
D883 Terminology Relating to Plastics
3
D1505Test Method for Density of Plastics by the Density-Gradient Technique Terminology Relating to Plastics
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
5
Calorimetry
D4894Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials Test Method for
Determining Temperatures and Heats of Transitions of Fluoropolymers by Differential Scanning Calorimetry
E94 Guide for Radiographic Examination
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.
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).
CurrenteditionapprovedApril10,2003.PublishedJune2003.Originallyapprovedin1974.Lastpreviouseditionapprovedin1997asD3294-97.DOI:10.1520/D3294-03.
Current edition approved Nov. 1, 2009. Published December 2009. Originally approved in 1974. Last previous edition approved in 2003 as D3294 - 03. DOI:
10.1520/D3294-09.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 10.02.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 – 09
3.1.2 lot, n—onecontinuousproductionrunorauniformblendoftwoormoreproductionrunsofonesizesheetormoldedbasic
shape.
3.2 Abbreviations:Abbreviations are in accordance with Terminology D1600.
4. Classification
4.1 This specification covers the following four types of molded basic sheets and shapes:
4.1.1 Type I—Premium; normally used for exacting electrical, mechanical, or chemical applications.
4.1.2 Type II—General purpose
...