ASTM D2148-22

Standard Test Methods for Bondable Silicone Rubber Tapes Used for Electrical Insulation

SIGNIFICANCE AND USE
5.1 Self-adhesion is a primary initial property since it affects layer-to-layer bonding. The integrity of the bond can significantly affect the electrical and physical performance of the insulation system. Therefore, the degree of self-adhesion is directly related to apparatus performance.  
5.2 A high degree of self-adhesion is desirable for most electrical applications. In this test, a short unwinding length indicates a high degree of self-adhesion.  
5.3 This test method has been found useful as a quality control test for lot acceptance.
SCOPE
1.1 These test methods cover tests for bondable silicone rubber tapes which form a sealed structure either with the application of heat (and pressure if needed) or by the process of auto-adhesion (self-fusing).  
1.2 These test methods appear in the following sections:    
Test Method  
Section  
Adhesion  
3 – 10  
Bond Strength  
11 – 18  
Dielectric Breakdown Voltage  
19 – 26  
Hardness  
41  
Length  
33 and 34  
Thickness  
27 – 32  
Width  
36 – 40  
1.3 Units—The values stated in SI units are the standard. The inch-pound units in parentheses are for information only. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4 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.  For a specific hazard statement see 23.1.1.  
1.5 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: Published
• Publication Date: 30-Sep-2022
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.07 - Electrical Insulating Materials

Standards Content (Sample)

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.
Designation: D2148 − 22
Standard Test Methods for
Bondable Silicone Rubber Tapes Used for Electrical
1
Insulation
This standard is issued under the fixed designation D2148; 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* 2. Referenced Documents
2
1.1 These test methods cover tests for bondable silicone 2.1 ASTM Standards:
rubber tapes which form a sealed structure either with the D149 Test Method for Dielectric Breakdown Voltage and
application of heat (and pressure if needed) or by the process DielectricStrengthofSolidElectricalInsulatingMaterials
of auto-adhesion (self-fusing). at Commercial Power Frequencies
D374/D374M Test Methods for Thickness of Solid Electri-
1.2 These test methods appear in the following sections:
cal Insulation
Test Method Section
D618 Practice for Conditioning Plastics for Testing
Adhesion 3–10
D1000 Test Methods for Pressure-Sensitive Adhesive-
Bond Strength 11–18
Coated Tapes Used for Electrical and Electronic Applica-
Dielectric Breakdown Voltage 19–26
tions
Hardness 41
Length 33 and 34
D1458 Test Methods for Fully Cured Silicone Rubber-
Thickness 27–32
Coated Glass Fabric and Tapes for Electrical Insulation
Width 36–40
3
(Withdrawn 2019)
1.3 Units—The values stated in SI units are the standard.
D2240 Test Method for Rubber Property—Durometer Hard-
The inch-pound units in parentheses are for information only.
ness
The values stated in each system are not necessarily exact
equivalents; therefore, to ensure conformance with the
ADHESION
standard, each system shall be used independently of the other,
3. Scope
and values from the two systems shall not be combined.
3.1 This test method covers the determination of the self-
1.4 This standard does not purport to address all of the
adhesion of unsupported, self-fusing silicone rubber rectangu-
safety concerns, if any, associated with its use. It is the
lar and taper-edge (Note 1) tape designed for use as electrical
responsibility of the user of this standard to establish appro-
insulation.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
NOTE 1—Taper-edge tape includes such cross sections as triangular,
For a specific hazard statement see 23.1.1.
lens, etc.
1.5 This international standard was developed in accor-
4. Hazards
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4.1 High Voltage:
Development of International Standards, Guides and Recom-
4.1.1 Lethal voltages are a potential hazard during the
mendations issued by the World Trade Organization Technical performance of this test. It is essential that the test apparatus,
Barriers to Trade (TBT) Committee.
and all associated equipment electrically connected to it, be
properly designed and installed for safe operation.
1 2
These test methods are under the jurisdiction of ASTM Committee D09 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Electrical and Electronic Insulating Materials and are the direct responsibility of contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Subcommittee D09.07 on Electrical Insulating Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2022. Published October 2022. Originally the ASTM website.
ɛ1
3
approved in 1963. Last previous edition approved in 2019 as D2148 – 19 . DOI: The last approved version of this historical standard is referenced on
10.1520/D2148-22. www.astm.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

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D2148 − 22
4.1.2 Solidly ground all electrically conductive parts which results.Whenproperlyassembled,themandrelshallturnfreely
it is possible for a person to contact during the test. when loaded with a 28 g (1-oz) weight suspended from a
4.1.3 Provide means for use at the completion of any test to cotton thread wound in a single layer at the center of the
ground any parts which were at high voltage during the test or mandrel.
have the potential for acquiring an induced charge during the
6.2 Weights, as specified in Section 8 and means for
test or retaining a charge even after disconnection of the
attachment.
vo
...

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.
´1
Designation: D2148 − 19 D2148 − 22
Standard Test Methods for
Bondable Silicone Rubber Tapes Used for Electrical
1
Insulation
This standard is issued under the fixed designation D2148; 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
ε NOTE—Adjunct information was updated editorially in January 2021.
1. Scope*
1.1 These test methods cover tests for bondable silicone rubber tapes which form a sealed structure either with the application of
heat (and pressure if needed) or by the process of auto-adhesion (self-fusing).
1.2 These test methods appear in the following sections:
Test Method Section
Adhesion 3 – 10
Bond Strength 11 – 18
Dielectric Breakdown Voltage 19 – 26
Hardness 41
Length 33 and 34
Thickness 27 – 32
Width 36 – 40
1.3 Units—The values stated in SI units are the standard. The inch-pound units in parentheses are for information only. The values
stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall
be used independently of the other, and values from the two systems shall not be combined.
1.4 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. For a specific hazard statement see 23.1.1.
1.5 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/D374M Test Methods for Thickness of Solid Electrical Insulation
1
These test methods are under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and are the direct responsibility of Subcommittee
D09.07 on Electrical Insulating Materials.
Current edition approved Aug. 1, 2019Oct. 1, 2022. Published August 2019October 2022. Originally approved in 1963. Last previous edition approved in 20182019 as
ɛ1
D2148 – 18.D2148 – 19 . DOI: 10.1520/D2148-19E01.10.1520/D2148-22.
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.
*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 ----------------------
D2148 − 22
D618 Practice for Conditioning Plastics for Testing
D1000 Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications
D1458 Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation (Withdrawn
3
2019)
D2240 Test Method for Rubber Property—Durometer Hardness
2.2 ASTM Adjuncts:
4
Tack Tester (one drawing)
ADHESION
3. Scope
3.1 This test method covers the determination of the self-adhesion of unsupported, self-fusing silicone rubber rectangular and
taper-edge (Note 1) tape designed for use as electrical insulation.
NOTE 1—Taper-edge tape includes such cross sections as triangular, lens, etc.
3.2 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.
3. Scope
3.1 This test method covers the determination of the self-adhesion of unsupported, self-fusing silicone rubber rectangular and
taper-edge (Note 1) tape designed for use as electrical insulation.
NOTE 1—Taper-edge tape includes such cross sections as triangular, lens, etc.
4. Hazards
4.1 High Voltage:
4.1.1 Lethal voltage
...