ASTM D2148-19

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 The 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: Historical
• Publication Date: 31-Jul-2019
• 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)

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: D2148 − 19
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 The 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
2.2 ASTM Adjuncts:
equivalents; therefore, to ensure conformance with the 4
Tack tester (one drawing)
standard, each system shall be used independently of the other,
and values from the two systems shall not be combined. ADHESION
1.4 This standard does not purport to address all of the
3. Scope
safety concerns, if any, associated with its use. It is the
3.1 This test method covers the determination of the self-
responsibility of the user of this standard to establish appro-
adhesion of unsupported, self-fusing silicone rubber rectangu-
priate safety, health, and environmental practices and deter-
lar and taper-edge (Note 1) tape designed for use as electrical
mine the applicability of regulatory limitations prior to use.
insulation.
For a specific hazard statement see 23.1.1.
1.5 This international standard was developed in accor-
NOTE 1—Taper-edge tape includes such cross sections as triangular,
lens, etc.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3.2 This international standard was developed in accor-
Development of International Standards, Guides and Recom-
dance with internationally recognized principles on standard-
mendations issued by the World Trade Organization Technical
ization established in the Decision on Principles for the
Barriers to Trade (TBT) Committee.
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
1
These methods are under the jurisdiction of ASTM Committee D09 on Standards volume information, refer to the standard’s Document Summary page on
Electrical and Electronic Insulating Materials and are the direct responsibility of the ASTM website.
3
Subcommittee D09.07 on Electrical Insulating Materials. The last approved version of this historical standard is referenced on
Current edition approved Aug. 1, 2019. Published August 2019. Originally
www.astm.org.
4
approved in 1963. Last previous edition approved in 2018 as D2148 – 18. DOI:
Available from ASTM International Headquarters. Order Adjunct No.
10.1520/D2148-19.
ADJD2148. Original adjunct produced in 1965.
*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 − 19
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Hazards
4.1 High Voltage:
4.1.1 Lethal voltages are a potential hazard during the
performance of this test. It is essential that the test apparatus,
and all associated equipment electrically connected to it, be
properly designed and installed for safe operation.
4.1.2 Solidly ground all electrically conductive parts which
it is possible for a person to contact during the test.
4.1.3 Provide means for use at the completion of any test to
ground any parts which were at high voltage during the test or
have the potential for acquiring an induced charge
...

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: D2148 − 18 D2148 − 19
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*
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 The 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 inch-pound units are to be regarded as standard, except for °C. The values SI units are the
standard. The inch-pound units in parentheses are mathematical conversions to SI units that are provided for information only and
are not considered standard.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
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
3
D6054 Practice for Conditioning Electrical Insulating Materials for Testing (Withdrawn 2012)
1
These 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 Nov. 1, 2018Aug. 1, 2019. Published December 2018August 2019. Originally approved in 1963. Last previous edition approved in 20132018
as D2148 – 13.D2148 – 18. DOI: 10.1520/D2148-18.10.1520/D2148-19.
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.
*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 − 19
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.
4. Hazards
4.1 High Voltage:
4.1.1 Lethal voltages are a
...