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ASTM D1458-01(2007)

(Test Method)

Standard Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation

Standard Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation

ABSTRACT
These test methods cover procedures for testing fully cured silicone rubber-coated glass fabric and tapes to be used for electrical insulation. The test procedures for the following test methods are detailed: (1) breaking strength, (2) breaking strength after creasing, (3) dielectric breakdown voltage, (4) dielectric proof voltage, (5) dissipation factor and relative permittivity, (6) thermal endurance, (7) thickness, (8) thread count, (9) volume resistivity, and (10) weight. The procedures for sampling of fabric rolls, fabric sheets, tapes and strips, and test specimen preparation and conditioning are given. The test apparatus, report requirements, and precision and bias for each test are provided. The drum type gripping device and creasing apparatus for breaking strength test are illustrated. Voltage stress test shall be done for dissipation factor and relative permittivity and volume resistivity tests.
SCOPE
1.1 These test methods cover procedures for testing fully cured silicone rubber-coated glass fabric and tapes to be used for electrical insulation.
1.2 The procedures appear in the following order:
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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. See 9.5.1 for a specific warning statement.

General Information

Status
Historical
Publication Date
30-Apr-2007
ICS
29.035.30 - Glass and ceramic insulating materials
Technical Committee
D09 - Electrical and Electronic Insulating Materials
Drafting Committee
D09.07 - Electrical Insulating Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D1458-01 - Standard Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation
Effective Date
01-May-2007
Replaced By
ASTM D1458-13 - Standard Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation (Withdrawn 2019)
Effective Date
01-Nov-2013
Referred By
ASTM D2148-22 - Standard Test Methods for Bondable Silicone Rubber Tapes Used for Electrical Insulation
Effective Date
01-May-2007
Referred By
ASTM D6343-14(2018) - Standard Test Methods for Thin Thermally Conductive Solid Materials for Electrical Insulation and Dielectric Applications
Effective Date
01-May-2007

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ASTM D1458-01(2007) - Standard Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical InsulationASTM D1458-01(2007) - Standard Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation
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ASTM D1458-01(2007) - Standard Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation
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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: D1458 − 01(Reapproved 2007) An American National Standard
Standard Test Methods for
Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes
1
for Electrical Insulation
This standard is issued under the fixed designation D1458; 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 DielectricStrengthofSolidElectricalInsulatingMaterials
at Commercial Power Frequencies
1.1 These test methods cover procedures for testing fully
D150 Test Methods forAC Loss Characteristics and Permit-
cured silicone rubber-coated glass fabric and tapes to be used
tivity (Dielectric Constant) of Solid Electrical Insulation
for electrical insulation.
D202 Test Methods for Sampling and Testing Untreated
1.2 The procedures appear in the following order:
Paper Used for Electrical Insulation
ASTM
D257 Test Methods for DC Resistance or Conductance of
Procedure Sections References
Insulating Materials
D295 Test Methods for Varnished Cotton Fabrics Used for
Breaking Strength 7 D828
Breaking Strength After Creasing 8 .
Electrical Insulation
Conditioning 5 .
D374 Test Methods for Thickness of Solid Electrical Insu-
Dielectric Breakdown Voltage 9 D149, D295,
lation
D6054
Dielectric Proof-Voltage 10 D1389
D828 Test Method for Tensile Properties of Paper and
Dissipation Factor and Relative Permittivity 11 D150
PaperboardUsingConstant-Rate-of-ElongationApparatus
Sampling 4 .
3
Thermal Endurance 15 D1830 (Withdrawn 2009)
Thickness 6 D374
D1389 Test Method for Proof-Voltage Testing of Thin Solid
Thread Count 14 .
Electrical Insulating Materials
Volume Resistivity 12 D257
D1711 Terminology Relating to Electrical Insulation
Weight 13 .
D1830 Test Method for Thermal Endurance of Flexible
1.3 The values stated in inch-pound units are to be regarded
Sheet Materials Used for Electrical Insulation by the
as the standard. The values given in parentheses are for
Curved Electrode Method
information only.
D5032 Practice for Maintaining Constant Relative Humidity
1.4 This standard does not purport to address all of the
by Means of Aqueous Glycerin Solutions
safety concerns, if any, associated with its use. It is the
D6054 Practice for Conditioning Electrical Insulating Mate-
responsibility of the user of this standard to establish appro-
rials for Testing
priate safety and health practices and determine the applica-
E104 Practice for Maintaining Constant Relative Humidity
bility of regulatory limitations prior to use. See 9.5.1 for a
by Means of Aqueous Solutions
specific warning statement.
3. Terminology
2. Referenced Documents
3.1 Definitions—For definitions of terms used in these test
2
2.1 ASTM Standards:
methods, see Terminology D1711.
D149 Test Method for Dielectric Breakdown Voltage and
4. Sampling
4.1 Sample shipments of material as specified below, and
1
These test methods are under the jurisdiction of ASTM Committee D09 on
where possible take only one sample from any package.
Electrical and Electronic Insulating Materials and are the direct responsibility of
Subcommittee D09.07 on Flexible and Rigid Insulating Materials.
4.1.1 Fabric—Over 3 in. (75 mm) in width.
Current edition approved May 1, 2007. Published June 2007. Originally
4.1.1.1 Rolls—Select one roll from each ten rolls or fraction
approved in 1957. Last previous edition approved in 2001 as D1458 – 01. DOI:
thereof in a shipment of full-width fabric. Cut off not less than
10.1520/D1458-01R07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D1458 − 01 (2007)
two turns of fabric from each roll selected from sampling, and certain properties, such as thermal conductivity and dielectric
select sample material for the preparation of test specimens constant, cannot be determined without a knowledge of thick-
from the remaining layers of the roll. ness.
4.1.1.2 Sheets—Select one sheet from each 50 sheets or
6.2 Test Specimens—Cut specimens prepared from fabric
fraction thereof in a shipment of sheeted fabric. Remove not
samples 1 in. (25 mm) wide across the entire width of the
less than six sheets from the outer layers of each packa
...

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