ASTM D952-95

Standard Test Method for Bond or Cohesive Strength of Sheet Plastics and Electrical Insulating Materials

SCOPE
1.1 This test method covers the determination of the bond strength or ply adhesion strength of sheet plastic and electrical insulating materials. It is applicable to both laminated and nonlaminated thermoplastic and thermosetting materials.
1.2 Test data obtained by this test method is relevant and appropriate for use in engineering design.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
Note 1—There is no known ISO equivalent to this standard.

General Information

• Status: Historical
• Publication Date: 09-Apr-2002
• ICS: 83.140.10 - Films and sheets
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.10 - Mechanical Properties

Relations

• Replaced By: ASTM D952-02 - Standard Test Method for Bond or Cohesive Strength of Sheet Plastics and Electrical Insulating Materials
• Effective Date: 10-Apr-2002
• Referred By: ASTM F521-22 - Standard Test Methods for Bond Integrity of Transparent Laminates
• Effective Date: 10-Apr-2002
• Referred By: ASTM D710-19 - Standard Specification for Vulcanized Fibre Sheets, Rolls, Rods, and Tubes Used for Electrical Insulation
• Effective Date: 10-Apr-2002
• Referred By: ASTM D619-21 - Standard Test Methods for Vulcanized Fibre Used for Electrical Insulation
• Effective Date: 10-Apr-2002
• Referred By: ASTM D2093-03(2017) - Standard Practice for Preparation of Surfaces of Plastics Prior to Adhesive Bonding
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 952 – 95
Standard Test Method for
Bond or Cohesive Strength of Sheet Plastics and Electrical
Insulating Materials
This standard is issued under the fixed designation D 952; 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 measure of the cohesive strength of the material. The property
determined is of fundamental aspect and has not yet been
1.1 This test method covers the determination of the bond
correlated with the results of any other method for bond
strength or ply adhesion strength of sheet plastic and electrical
strength.
insulating materials. It is applicable to both laminated and
3.2 The test may be found to be useful as (1) a research test
nonlaminated thermoplastic and thermosetting materials and
when studying the effects of changes in independent variables,
vulcanized rubber.
(2) a specification test, or (3) a referee test.
1.2 Test data obtained by this test method is relevant and
3.3 For many materials, there may be a specification that
appropriate for use in engineering design.
requires the use of this test method, but with some procedural
1.3 The values stated in SI units are to be regarded as the
modifications that take precedence when adhering to the
standard. The values given in parentheses are for information
specification. Therefore, it is advisable to refer to that material
only.
specification before using this test method. Table 1 of Classi-
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
TABLE 1 Precision Data
responsibility of the user of this standard to establish appro-
Average Coefficient of Variation
priate safety and health practices and determine the applica-
A B
Materials Strength, MPa n Within n Between
r R
bility of regulatory limitations prior to use.
(psi) Laboratories Laboratories
BMC 12.7 (1840) 7.1 7.1
2. Referenced Documents
SMC 14.0 (2030) 5.4 8.8
A
n is the within-laboratories standard deviation of the mean, expressed as a
2.1 ASTM Standards: r
percentage of the listed average.
D 618 Practice for Conditioning Plastics and Electrical
B
n is the between-laboratories standard deviation of the mean, expressed as
R
Insulating Materials for Testing
a percentage of the listed average.
D 4000 Classification System for Specifying Plastic Mate-
rials
fication System D 4000 lists the ASTM materials standards that
D 4066 Specification for Nylon Injection and Extrusion
currently exist.
Materials
4. Apparatus and Materials
E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
4.1 Testing Machine—Any suitable tensile testing machine
2.2 ANSI Standard:
capable of crosshead movement at a constant rate of 1.3
B1.1 Standard for Unified Screw Threads
mm/min.
4.2 Loading Fixtures—The loading fixtures shall be self-
3. Significance and Use
aligning and shall not apply eccentric loads.
3.1 This test, when applied to laminated plastics, is a
4.3 Metal Blocks—A pair of 51-mm (2-in.) square metal
measure of the interlaminar or intralaminar strength, whichever
blocks each having a maximum height of 51 mm (2 in.). Each
is smaller. When applied to nonlaminated plastics, the test is a
block shall contain a hole to permit attachment to the loading
fixture (see Fig. 1).
NOTE 1—Blocks constructed from heat-treated aluminum alloy, each
This test method is under the jurisdiction of ASTM Committee D-20 on Plastics 7
having a hole in one end tapped ⁄8 in. in accordance with ANSI B1.1, to
and is the direct responsibility of Subcommittee D20.10 on Mechanical Properties.
accommodate threaded ⁄8-in. studs of convenient length, have been used
Current edition approved Oct. 10, 1995. Published December 1995. Originally
successfully.
published as D 952 – 48 T. Last previous edition D 952 – 93.
Annual Book of ASTM Standards, Vol 08.01.
4.4 Adhesive—Any adhesive that is found to perform satis-
Annual Book of ASTM Standards, Vol 08.02.
factorily under this test may be used provided that it will not
Annual Book of ASTM Standards, Vol 14.02.
5 influence the specimen behavior by physical or chemical
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Floor, New York, NY 10036. effects.
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D 952
7. Specimen Preparation
7.1 Determine the cross-sectional area of the test specimen
in a plane parallel to the surface. Gently rub both sides of the
specimen with 00 emery cloth. Do not rub the specimen on the
cloth since the corners will then be abraded more than other
parts of the surface. Clean the bond areas of the specimen and
metal blocks with a suitable solvent which does not chemically
affect the surfaces. Do not touch the cleaned surfaces with the
hands. Apply a coating of adhesive to the cleaned surfaces of
the blocks.
7.2 Place the specimen between the coated blocks being
certain that the blocks are aligned. If pressure or temperature,
or both, is (are) necessary to cure the adhesive, insert the
assembly into a properly adjusted press. The bonding pressure
shall not be greater than the pressure used in the construction
of the material. The bonding temperature shall be room
temperature or at least 50°C below the temperature at which
the material was constructed. In any case, the bonding proce-
dure shall not alter the material. Permit specimens to condition
FIG. 1 Test Assembly for Bond Strength Test
in accordance with 6.1.
8. Procedure
NOTE 2—Redux has been found satisfactory for use with certain
thermoset materials. Cyanoacrylate cement and ro
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