ASTM D2400-99(2004)

Standard Specification for Varnished Glass-Polyester Cloth Used for Electrical Insulation (Withdrawn 2013)

ABSTRACT
This specification applies to black and yellow varnished woven cloth and tape for electrical insulation, having as a base fabric poly(ethylene terephthalate) yarns in the warp direction and glass yarns in the filler direction. Materials needed in the manufacture of cloth and tape include base fabric, filler thread, warp thread, and varnish. The varnished fabric and tape shall be free from wrinkles, blisters, or any imperfections which will detract from its value as electrical insulation. Sheets, rolls, and tapes of black varnished cloth shall have two different types of surface finish: greasy and dry. Yellow varnished cloth shall be furnished only with dry finish. Under normal room conditions greasy tapes shall have the property of sliding freely between layers when moved by the fingers, and shall show a decidedly oily surface. Dry finish tapes shall show some resistance to movement when so handled, but shall not bind or stick together and shall not have an oily surface. A slight amount of waxiness shall be permitted in dry cloth if dullness of surface is not apparent or if noticeable amounts of wax cannot be removed mechanically from the surface. Different tests shall be conducted in order to determine the following electrical and mechanical properties of the cloth and tape: dielectric breakdown voltage, breaking strength, tear resistance, elongation, and temperature index.
SCOPE
1.1 This specification applies to black and yellow varnished woven cloth and tape for electrical insulation, having as a base fabric poly(ethylene terephthalate) yarns in the warp direction and glass yarns in the filler direction.
1.2 The values stated in inch-pound units are to be regarded as the standard.
WITHDRAWN RATIONALE
This specification applies to black and yellow varnished woven cloth and tape for electrical insulation, having as a base fabric poly(ethylene terephthalate) yarns in the warp direction and glass yarns in the filler direction.
Formerly under the jurisdiction of Committee D09 on Electrical and Electronic Insulating Materials, this practice was withdrawn in January 2013 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 09-Oct-1999
• Withdrawal Date: 31-Dec-2012
• ICS: 29.035.30 - Glass and ceramic insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.07 - Electrical Insulating Materials

Relations

• Replaces: ASTM D2400-99 - Standard Specification for Varnished Glass-Polyester Cloth Used for Electrical Insulation
• Effective Date: 10-Oct-1999

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:D2400 −99(Reapproved 2004) An American National Standard
Standard Specification for
Varnished Glass-Polyester Cloth Used for Electrical
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Insulation
This standard is issued under the fixed designation D2400; 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 4.1.6 Number of rolls per package, and
4.1.7 Marking on package.
1.1 This specification applies to black and yellow varnished
woven cloth and tape for electrical insulation, having as a base
5. Materials and Manufacture
fabric poly(ethylene terephthalate) yarns in the warp direction
and glass yarns in the filler direction. 5.1 Materials—The base fabric for all thickness and color
styles shall have a nominal thickness of 0.004 in. (0.10 mm)
1.2 The values stated in inch-pound units are to be regarded
and a warp by filler thread count per inch (or centimetre) of
as the standard.
32(12.6) by 28(11.0) respectively. The varnish shall be of the
oleoresinous type.The warp threads shall consist of 140 denier
2. Referenced Documents
continuous filament yarns having a twist of 5 turns per inch,
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2.1 ASTM Standards:
and the filler threads shall consist of ECG-150-1/0 yarns.
D295 Test Methods for Varnished Cotton Fabrics Used for
5.2 Splices—The material shall not be spliced unless agreed
Electrical Insulation
upon by the purchaser and the manufacturer. If it is necessary
D902 Test Methods for Flexible Resin-Coated Glass Fabrics
to splice, splices shall not occur more than once in each roll of
and Glass Fabric Tapes Used for Electrical Insulation
100 yd (92 m) or less, except that rolls having a length of 6 yd
D1711 Terminology Relating to Electrical Insulation
(5.5 m) or less shall contain no splices. All splices shall be
D3487 Specification for Mineral Insulating Oil Used in
flagged in a manner suitable to the purchaser.
Electrical Apparatus
D3636 Practice for Sampling and Judging Quality of Solid
5.3 Nonconformities—The varnished fabric and tape shall
Electrical Insulating Materials
be free from wrinkles, blisters, or any imperfections which will
detract from its value as electrical insulation.
3. Terminology
3.1 Definitions: For definitions of terms used in this speci- 6. Electrical and Mechanical Requirements
fication refer to Terminology D1711.
6.1 The electrical and mechanical requirements shall be in
accordance with the values shown in Table 1.
4. Ordering Information
4.1 Orders for material covered by this specification shall
7. Oil Resistance
include the following:
7.1 The varnish film shall show no evidence of blistering, or
4.1.1 Color: black or yellow,
disintegration in the oil or on the blotter used in the test. The
4.1.2 Nominal thickness, width and length,
oil used in the test shall not become turbid.
4.1.3 Type of surface: greasy or dry,
NOTE 1—Slight swelling of the film in that portion of the material
4.1.4 Core size and type,
located between the yarns sometimes occurs, particularly with freshly
4.1.5 Type of packing: dry or in oil,
coated goods. This is evidenced by a regularity in the spacing of the
“blisters” and can be differentiated from true blistering, which occurs
randomly spaced over the surface of the test specimens.
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This specification is under the jurisdiction of ASTM Committee D09 on
Electrical and Electronic Insulating Materials and is the direct responsibility of
8. Dimensional Requirements
Subcommittee D09.07 on Flexible and Rigid Insulating Materials.
Current edition approved Nov. 1, 2004. Published November 1999. Originally
8.1 Thickness requirements shall be in accordance with the
approved in 1967. Last previous edition approved in 1994 as D2400 – 94. DOI:
values shown in Table 2.
10.1520/D2400-99R04.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8.2 The nominal width shall be specified in the purchase
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
order. Individual measurements on all samples selected shall
Standards volume information, refer to the standard’s Document Summary page on
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the ASTM website. not vary from the nominal width by more than 6 ⁄32 in. (0.8
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D2400−99 (2004)
A
TABLE 1 Electrical and Mechanical Requirements
Color Style Black Yellow
Nominal Thickness, in. (mm) 0.008 (0.20) 0.010 (0.25) 0.012 (0.31) 0.008 (0.20) 0.010 (0.25)
Breaking strength, lbf/in. (N/m): (7.0) (7.0) (7.0) (7.0) (7.0)
Warp 40 40 40 40 40
Filler 100 (17.5) 100 (17.5) 100 (17.5) 100 (17.5) 100 (17.5)
...