ASTM D3308-12

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 and health 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.

General Information

• Status: Historical
• Publication Date: 31-Jul-2012
• ICS: 83.140.10 - Films and sheets
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaces: ASTM D3308-06 - Standard Specification for PTFE Resin Skived Tape
• Effective Date: 01-Aug-2012
• Referred By: ASTM F336-02(2023) - Standard Practice for Design and Construction of Nonmetallic Enveloped Gaskets for Corrosive Service
• Effective Date: 01-Aug-2012

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
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 Department of Defense.
1. Scope* D792 Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This specification covers skived tape in thicknesses
D882 Test Method for Tensile Properties of Thin Plastic
from 0.013 to 6.35 mm (0.0005 to 0.250 in.) manufactured by
Sheeting
skiving (Note 1) from PTFE resin molding and extrusion
D883 Terminology Relating to Plastics
materials.
D1389 Test Method for Proof-Voltage Testing of Thin Solid
NOTE 1—Skiving is the process of continuously shaving a film on a
Electrical Insulating Materials
lathe from the outer surface to the core of a molded cylindrical tube of
D1600 Terminology forAbbreviatedTerms Relating to Plas-
material.
tics
NOTE 2—Abbreviations have been approved fromTerminology D1600.
D3892 Practice for Packaging/Packing of Plastics
1.2 The values stated in inch-pound units are to be regarded
D4894 Specification for Polytetrafluoroethylene (PTFE)
as standard. The values given in parentheses are for informa-
Granular Molding and Ram Extrusion Materials
tion only.
2.2 ISO Standards:
1.3 The following hazard caveat pertains only to the test
ISO 13000-1 Plastics—Polytetrafluorethylene (PTFE) Semi-
method portion, Section 8, of this specification: This standard
3
Finished Products Part 1: Requirements and Designation
does not purport to address all of the safety concerns, if any,
ISO 13000-2 Plastics—Polytetrafluorethylene (PTFE)
associated with its use. It is the responsibility of the user of this
Semi-Finished Products Part 2: Preparation of Specimens
standard to establish appropriate safety and health practices
3
and Determination of Properties
and determine the applicability of regulatory limitations prior
to use.
3. Terminology
NOTE 3—This specification and ISO 13000-1 and ISO 13000-2 differ in
3.1 Definitions:
approach or detail, and data obtained using either may not be technically
Definitions are in accordance with Terminology D883 unless
equivalent.
otherwise specified.
2. Referenced Documents
3.2 Definitions of Terms Specific to this Standard:
2
3.2.1 lot, n—One production run, or a uniform blend of two
2.1 ASTM Standards:
or more production runs.
D149 Test Method for Dielectric Breakdown Voltage and
3.2.2 film, n—full-width material received as finished film.
DielectricStrengthofSolidElectricalInsulatingMaterials
1
3.2.3 Mil, n— ⁄1000 (0.001) of an inch.
at Commercial Power Frequencies
D374 Test Methods for Thickness of Solid Electrical Insu-
4. Classification
lation
D618 Practice for Conditioning Plastics for Testing
4.1 This specification covers four types of PTFE resin
D638 Test Method for Tensile Properties of Plastics
skived tape:
4.1.1 Type I—Premium; normally used for exacting
electrical, mechanical, or chemical applications.
1
This specification is under the jurisdiction of ASTM Committee D20 on
4.1.2 Type II—General purpose; for electrical, mechanical,
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
and chemical applications not requiring premium material.
Materials (Section D20.15.12).
4.1.3 Type III—Commercial; for non-critical chemical,
Current edition approved Aug. 1, 2012. Published September 2012. Originally
approved in 1974. Last previous edition approved in 2006 as D3308 - 06. DOI:
electrical, and mechanical applications.
10.1520/D3308-12.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute, 25 W. 43rd St., 4th
the ASTM website. Floor, New York, NY 10036.
*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
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 0.013 to 0.025 0.0005 to 0.0010 ±0.003 ±0.0001
12.701 to 25.400 0.501 to −0/+0.640 −0/+0.025 0.028 to 0.076 0.0011 to 0.0030 ±0.008 ±0.0003
1.000 0.091 to 0.254 0.0036 to 0.0100 ±0.013 ±0.0005
25.401 to 50.800 1.001 to −0/+0.8
...

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 − 06 D3308 − 12
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 Department of Defense.
1. Scope*
1.1 This specification covers skived tape in thicknesses from 0.013 to 6.35 mm [0.0005(0.0005 to 0.250 in.]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 bracketsparentheses 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 and health 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.
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
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
D1389 Test Method for Proof-Voltage Testing of Thin Solid Electrical Insulating Materials
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
2.2 ISO Standards:
3
ISO 13000-1 Plastics—Polytetrafluorethylene (PTFE) Semi-Finished Products Part 1: Requirements and Designation
ISO 13000-2 Plastics—Polytetrafluorethylene (PTFE) Semi-Finished Products Part 2: Preparation of Specimens and Determi-
3
nation of Properties
3. Terminology
3.1 Definitions:
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).
Current edition approved April 1, 2006Aug. 1, 2012. Published June 2006September 2012. Originally approved in 1974. Last previous edition approved in 20012006 as
D3308 - 01.D3308 - 06. DOI: 10.1520/D3308-06.10.1520/D3308-12.
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
Available from American National Standards Institute, 25 W. 43rd St., 4th Floor, New York, NY 10036.
*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
TABLE 1 Width Tolerances for Skived Tape
Width Tolerance
mm in. mm in.
Up to 12.700 Up to 0.500 −0/+0.510 −0/+0.020
12.701 to 25.400 0.501 to −0/+0.640 −0/+0.025
1.000
25.401 to 50.800 1.001 to −0/+0.890 −0/+0.035
2.000
50.801 to 76.200 2.001 to −0/+1.905 −0/+0.075
3.000
76.201 to 152.400 3.001 to −0/+3.175 −0/+0.125
6.000
152.401 or greater 6.001 or −0/+6.350 −0/+0.250
greater
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 production runs.
3.2.2 film, n—full-width material received as finished film.
1
3.2.3 Mil, n— ⁄1000 (0.001) of an inch.
4. Classification
4.1 This specification covers four types of PTFE r
...