ASTM D6004-96

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Designation: D 6004 – 96
Standard Test Method for
Determining Adhesive Shear Strength of Carpet Adhesives
This standard is issued under the fixed designation D 6004; 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 titatively the shear strength development and at which strength
level the adhesive will fail.
1.1 This test method describes a procedure to measure shear
strength development for adhesives used to bond carpet.
5. Apparatus
1.2 This test method provides a quantitative means of
5.1 Applicator trowel, with a notch pattern of ⁄8 in. (3.2
measuring and recording shear strength of the adhesive when it
3 1
mm) wide, ⁄32 in. (2.4 mm) deep, ⁄8 in. (3.2 mm) flat.
is applied to the desired substrate.
5.2 Three 10-lb (4.54-kg) Weights.
1.3 The values stated in inch-pound units are to be regarded
5.3 Three 2-in. (51 mm) 3 3-in. (76 mm) Pieces of Hard-
as the standard. The values given in parentheses are for
board, used to distribute weight.
information only.
5.4 Test machine capable of at least a 100-lb load.
1.4 This standard does not purport to address all of the
5.5 Convection Oven, capable of maintaining a temperature
safety concerns, if any, associated with its use. It is the
of 122 6 2°F (50 6 1°C).
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Materials
bility of regulatory limitations prior to use.
6.1 Adhesive—Any appropriate adhesive for carpet instal-
2. Referenced Documents lation.
6.2 Carpet—Polypropylene backed.
2.1 ASTM Standards:
6.3 Tempered Hardboard.
D 618 Practice for Conditioning Plastics and Electrical
Insulating Materials for Testing
7. Conditioning
D 907 Terminology of Adhesives
7.1 Condition the carpet, hardboard and adhesive to be
tested 24 h at 73.4 6 3.6°F (23 6 2°C) and 50 % 6 5%
3. Terminology
relative humidity prior to testing.
3.1 Definitions—Many of the terms in this test method are
defined in Terminology D 907.
8. Sample Preparation
3.2 Definitions of Terms Specific to This Standard:
8.1 Cut the carpet into three 2-in. (51-mm) 3 5-in. (127-
3.2.1 shear strength, n—the maximum average stress when
mm) pieces.
a force is applied parallel to the joint.
8.2 Cut one piece of hardboard into a 10-in. (254-mm) 3 5-
3.2.1.1 Discussion—In most adhesive test methods, the
in. (127-mm) section.
shear strength is actually the maximum average stress at failure
of the specimen, not necessarily the true maximum stress in the
9. Procedure
material.
9.1 Hold the trowel at a 45° angle and spread the adhesive
lengthwise over the entire tempered surface of the board.
4. Significance and Use
9.2 Wait 10 min and place three pieces of carpet perpen-
4.1 In selecting or developing a carpet adhesive, it is critical
dicular to the trowel pattern, each covering a 6-in. (2 in. 3 3
to have knowledge regarding how well the adhesive will bond
in.) area of the adhesive (Fig. 1).
to the desired substrate. Shear loading is commonly used
9.3 Place a 2-in. 3 3-in. piece of hardboard on top of the
because it closely duplicates the common mode of failure for
carpet bonded to the hardboard (Fig. 2).
such adhesives.
9.4 Place a 10-lb we
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