ASTM D2148-22 - 1.10.2022
 
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.

 
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?UnitsThe 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

D374-99

Standard Test Methods for Thickness of Solid Electrical Insulation

D149-20

Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

Tack tester (one drawing) Available from ASTM International Headquarters. Order Adjunct No. . Original adjunct produced in 1965.

D1458-13

Standard Test Methods for Fully Cured Silicone Rubber-Coated Glass Fabric and Tapes for Electrical Insulation (Withdrawn 2019)

D2240-15(2021)

Standard Test Method for Rubber Property—Durometer Hardness

D6054-97

Standard Practice for Conditioning Electrical Insulating Materials for Testing

D1000-17

Standard Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applications