ASTM D2148-02

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

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 MethodSectionAdhesion3-9 Bond Strength10-17 Dielectric Breakdown Voltage18-25 Hardness40Length 32 and 33Thickness26-31Width 35-39
1.3 The values stated in inch-pound units are to be regarded as the standard except for °C.
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 and health practices and determine the applicability of regulatory limitations prior to use.  For a specific hazard statement see 22.1.1.

General Information

• Status: Historical
• Publication Date: 09-Mar-2002
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: D09 - Electrical and Electronic Insulating Materials
• Drafting Committee: D09.07 - Electrical Insulating Materials

Relations

• Replaces: ASTM D2148-95 - Standard Test Methods for Bondable Silicone Rubber Tapes Used for Electrical Insulation
• Effective Date: 10-Mar-2002
• Replaced By: ASTM D2148-02e1 - Standard Test Methods for Bondable Silicone Rubber Tapes Used for Electrical Insulation
• Effective Date: 10-Mar-2002

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation:D2148–02
Standard Test Methods for
Bondable Silicone Rubber Tapes Used for Electrical
1
Insulation
This standard is issued under the fixed designation D 2148; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 2240 Test Method for Rubber Property—Durometer
3
Hardness
1.1 These test methods cover tests for bondable silicone
D 6054 Practice for Conditioning Electrical Insulating Ma-
rubber tapes which form a sealed structure either with the
4
terials for Testing
application of heat (and pressure if needed) or by the process
of auto-adhesion (self-fusing).
ADHESION
1.2 The methods appear in the following sections:
Test Method Section 3. Scope
3.1 This test method covers the determination of the self-
Adhesion 3-9
Bond Strength 10-17 adhesion of unsupported, self-fusing silicone rubber rectangu-
Dielectric Breakdown Voltage 18-25
lar and taper-edge (Note 1) tape designed for use as electrical
Hardness 40
insulation.
Length 32 and 33
Thickness 26-31
NOTE 1—Taper-edge tape includes such cross sections as triangular,
Width 35-39
lens, etc.
1.3 The values stated in inch-pound units are to be regarded
4. Significance and Use
as the standard except for °C.
1.4 This standard does not purport to address all of the
4.1 Self-adhesionisaprimaryinitialpropertysinceitaffects
safety concerns, if any, associated with its use. It is the
layer-to-layer bonding. The integrity of the bond can signifi-
responsibility of the user of this standard to establish appro-
cantly affect the electrical and physical performance of the
priate safety and health practices and determine the applica-
insulation system. Therefore, the degree of self-adhesion is
bility of regulatory limitations prior to use. For a specific
directly related to apparatus performance.
hazard statement see 22.1.1.
4.2 A high degree of self-adhesion is desirable for most
electrical applications. In this test, a short unwinding length
2. Referenced Documents
indicates a high degree of self-adhesion.
2.1 ASTM Standards:
4.3 This test method has been found useful as a quality
D 149 Test Methods for Dielectric Breakdown Voltage and
control test for lot acceptance.
Dielectric Strength of Solid Electrical Insulating Materials
2
5. Apparatus
at Commercial Power Frequencies
D 374 Test Methods for Thickness of Solid Electrical Insu-
5.1 Inclined Mandrel Tack Test Fixture—A suggested fix-
2
5
5
lation
ture is shown in Fig. 1. The mandrel shall consist of a ⁄8-in.
D 1000 Test Methods for Pressure-Sensitive Adhesive
(15.9-mm) diameter aluminum rod mounted in low-friction
Coated Tapes Used for Electrical and Electronic Applica-
bearings. Good alignment of bearings is necessary for accurate
2
tions
results.Whenproperlyassembled,themandrelshallturnfreely
D 1458 Test Methods for Fully Cured Silicone Rubber-
when loaded with a 1-oz (30-g) weight suspended from a
2
Coated Glass Fabric and Tapes for Electrical Insulation
cotton thread wound in a single layer at the center of the
mandrel.
1
These methods are under the jurisdiction of ASTM Committee D09 on
3
Electrical and Electronic Insulating Materials and are the direct responsibility of Annual Book of ASTM Standards, Vol 09.01.
4
Subcommittee D09.07 on Flexible and Rigid Insulating Materials. Annual Book of ASTM Standards, Vol 10.02.
5
Current edition approved March 10, 2002. Published June 2002. Originally A detailed drawing of a suggested fixture is available at a nominal cost from
published as D 2148 – 63 T. Last previous edition D 2148 – 95. ASTM Headquarters, 100 Barr Harbor Drive, West Conshohocken, PA 19428.
2
Annual Book of ASTM Standards, Vol 10.01. Request Adjunct No. ADJD2148.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D2148–02
1 min. Remove the winding weight from the tape and the
handle from the fixture and proceed with the unwinding test.
7.2 Unwinding—After the tape has bonded for 1 min, attach
a load of 21 oz (600 g)/in. (25 mm) of the original tape width
(Note2).Attachtheweighttothefreeendofthetapebymeans
of a bulldog paper clamp or other suitable device. Release the
weight and record the length of tape unwound in 3 min.
Although the original 1-in. dimensions will elongate due to the
unwind weight, consider each division as one unit. While the
winding weights are not critical, the use of proper unwinding
weights is mandatory. Consistent and comparable results de-
pend upon accurate width measurements and the use of the
proper unwinding
...