ASTM D3308-12(2017)

Standard Specification for PTFE Resin Skived Tape

ABSTRACT
This specification covers four types and two grades of skived tapes in specified thicknesses manufactured by skiving from PTFE resin molding and extrusion materials. The four types covered here are: Type I (premium), normally used for exacting electrical, mechanical, or chemical applications; Type II (general purpose), for electrical, mechanical, and chemical applications not requiring premium material; Type III (commercial), for non-critical chemical, electrical, and mechanical applications; and Type IV (utility), having no electrical requirements, and with mechanical properties at lower level. Subsequently, all four types may be subdivided into Grade 1, which is made only from virgin resin, and Grade 2, which may be made using reprocessed resin, or a mixture of virgin and reprocessed resin. Appropriately sampled specimens shall be tested and conform accordingly to the following physical requirements: dimension (length, width, and thickness); melting point; tensile properties (tensile strength and elongation at break); specific gravity; dielectric strength; and non-dielectric strength failure mode electrical flaws.
SCOPE
1.1 This specification covers skived tape in thicknesses from 0.013 to 6.35 mm (0.0005 to 0.250 in.) manufactured by skiving (Note 1) from PTFE resin molding and extrusion materials.  
Note 1: Skiving is the process of continuously shaving a film on a lathe from the outer surface to the core of a molded cylindrical tube of material.
Note 2: Abbreviations have been approved from Terminology D1600.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are for information only.  
1.3 The following hazard caveat pertains only to the test method portion, Section 8, 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.
Note 3: This specification and ISO 13000-1 and ISO 13000-2 differ in approach or detail, and data obtained using either may not be technically equivalent.  
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.

General Information

• Status: Historical
• Publication Date: 31-Aug-2017
• ICS: 83.140.10 - Films and sheets
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

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:D3308 −12 (Reapproved 2017)
Standard Specification for
1
PTFE Resin Skived Tape
This standard is issued under the fixed designation D3308; 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 DielectricStrengthofSolidElectricalInsulatingMaterials
at Commercial Power Frequencies
1.1 This specification covers skived tape in thicknesses
D374 Test Methods for Thickness of Solid Electrical Insu-
from 0.013 to 6.35 mm (0.0005 to 0.250 in.) manufactured by
lation (Metric) D0374_D0374M
skiving (Note 1) from PTFE resin molding and extrusion
D618 Practice for Conditioning Plastics for Testing
materials.
D638 Test Method for Tensile Properties of Plastics
NOTE 1—Skiving is the process of continuously shaving a film on a
D792 Test Methods for Density and Specific Gravity (Rela-
lathe from the outer surface to the core of a molded cylindrical tube of
tive Density) of Plastics by Displacement
material.
D882 Test Method for Tensile Properties of Thin Plastic
NOTE 2—Abbreviations have been approved fromTerminology D1600.
Sheeting
1.2 The values stated in inch-pound units are to be regarded
D883 Terminology Relating to Plastics
as standard. The values given in parentheses are for informa-
D1389 Test Method for Proof-Voltage Testing of Thin Solid
tion only.
3
Electrical Insulating Materials (Withdrawn 2013)
1.3 The following hazard caveat pertains only to the test
D1600 Terminology forAbbreviatedTerms Relating to Plas-
method portion, Section 8, of this specification: This standard
tics
does not purport to address all of the safety concerns, if any,
D3892 Practice for Packaging/Packing of Plastics
associated with its use. It is the responsibility of the user of this
D4894 Specification for Polytetrafluoroethylene (PTFE)
standard to establish appropriate safety, health and environ-
Granular Molding and Ram Extrusion Materials
4
mental practices and determine the applicability of regulatory
2.2 ISO Standards:
limitations prior to use.
ISO 13000-1 Plastics—Polytetrafluorethylene (PTFE) Semi-
Finished Products Part 1: Requirements and Designation
NOTE 3—This specification and ISO 13000-1 and ISO 13000-2 differ in
approach or detail, and data obtained using either may not be technically
ISO 13000-2 Plastics—Polytetrafluorethylene (PTFE)
equivalent.
Semi-Finished Products Part 2: Preparation of Specimens
1.4 This international standard was developed in accor-
and Determination of Properties
dance with internationally recognized principles on standard-
3. Terminology
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3.1 Definitions—Definitions are in accordance with Termi-
mendations issued by the World Trade Organization Technical
nology D883 unless otherwise specified.
Barriers to Trade (TBT) Committee.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 lot, n—one production run, or a uniform blend of two
2. Referenced Documents
or more production runs.
2
2.1 ASTM Standards:
3.2.2 film, n—full-width material received as finished film.
D149 Test Method for Dielectric Breakdown Voltage and
1
3.2.3 Mil, n— ⁄1000 (0.001) of an inch.
1 4. Classification
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
4.1 This specification covers four types of PTFE resin
Materials (Section D20.15.12).
skived tape:
Current edition approved Sept. 1, 2017. Published September 2017. Originally
approved in 1974. Last previous edition approved in 2012 as D3308 - 12. DOI:
10.1520/D3308-12R17.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The last approved version of this historical standard is referenced on
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM www.astm.org.
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 ----------------------
D3308−12 (2017)
TABLE 1 Width Tolerances for Skived Tape TABLE 2 Thickness Tolerances for Skived Tape
Width Tolerance Thickness Tolerance
mm in. mm in. mm in. mm in.
Up to 12.700 Up to 0.500 −0/+0.510 −0/+0.020 0.01
...

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: D3308 − 12 D3308 − 12 (Reapproved 2017)
Standard Specification for
1
PTFE Resin Skived Tape
This standard is issued under the fixed designation D3308; 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*Scope
1.1 This specification covers skived tape in thicknesses from 0.013 to 6.35 mm (0.0005 to 0.250 in.) manufactured by skiving
(Note 1) from PTFE resin molding and extrusion materials.
NOTE 1—Skiving is the process of continuously shaving a film on a lathe from the outer surface to the core of a molded cylindrical tube of material.
NOTE 2—Abbreviations have been approved from Terminology D1600.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are for information
only.
1.3 The following hazard caveat pertains only to the test method portion, Section 8, 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.
NOTE 3—This specification and ISO 13000-1 and ISO 13000-2 differ in approach or detail, and data obtained using either may not be technically
equivalent.
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.
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
D374 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
D882 Test Method for Tensile Properties of Thin Plastic Sheeting
D883 Terminology Relating to Plastics
3
D1389 Test Method for Proof-Voltage Testing of Thin Solid Electrical Insulating Materials (Withdrawn 2013)
D1600 Terminology for Abbreviated Terms Relating to Plastics
D3892 Practice for Packaging/Packing of Plastics
D4894 Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram Extrusion Materials
4
2.2 ISO Standards:
ISO 13000-1 Plastics—Polytetrafluorethylene (PTFE) Semi-Finished Products Part 1: Requirements and Designation
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 Aug. 1, 2012Sept. 1, 2017. Published September 2012September 2017. Originally approved in 1974. Last previous edition approved in 20062012
as D3308 - 06.D3308 - 12. DOI: 10.1520/D3308-12.10.1520/D3308-12R17.
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.
3
The last approved version of this historical standard is referenced on www.astm.org.
4
Available from American National Standards Institute, Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.10036, 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 ----------------------
D3308 − 12 (2017)
ISO 13000-2 Plastics—Polytetrafluorethylene (PTFE) Semi-Finished Products Part 2: Preparation of Specimens and Determi-
nation of Properties
3. Terminology
3.1 Definitions: Definitions—
Definitions are in accordance with Terminology D883 unless otherwise specified.
3.2 Definitions of Terms Specific to this Standard:
3.2.1 lot, n—One production run, or a uniform blend of two or more produc
...