ASTM D5169-98(2015)

Standard Test Method for Shear Strength (Dynamic Method) of Hook and Loop Touch Fasteners

SIGNIFICANCE AND USE
5.1 This test method gives a measure of a key property of hook and loop touch fasteners which is of interest to users of such devices. This is a means of determining the resistance to separation when forces are applied parallel to the plane of the fastener.  
5.2 In the case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogenous as possible and which are from a lot of hook and loop of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t-test and an acceptable probability level chosen by the two parties before the testing began. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in the light of the known bias.
SCOPE
1.1 This test method measures the shear strength of hook and loop touch (CRE) fasteners using a recording constant rate of extension tensile testing machine.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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.

General Information

• Status: Historical
• Publication Date: 31-Jan-2015
• ICS: 21.060.01 - Fasteners in general
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.54 - Subassemblies

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D5169 −98 (Reapproved 2015)
Standard Test Method for
Shear Strength (Dynamic Method) of Hook and Loop Touch
1
Fasteners
This standard is issued under the fixed designation D5169; 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 touch fasteners in which the fastening strength in the shear
mode (that is, against forces applied in the plane of the
1.1 This test method measures the shear strength of hook
fastener) substantially exceeds the fastening strength in the
and loop touch (CRE) fasteners using a recording constant rate
peel mode (that is, against forces applied perpendicular to the
of extension tensile testing machine.
planes of the two components of the fastener).
1.2 The values stated in inch-pound units are to be regarded
3.1.2 shear strength, n—the resistance to forces that cause,
as standard. The values given in parentheses are mathematical
or tend to cause, two contiguous parts of a body to slide
conversions to SI units that are provided for information only
relatively to each other in a direction parallel to their plane of
and are not considered standard.
contact.
1.3 This standard does not purport to address all of the
3.2 For definitions of other textile terms used in this test
safety concerns, if any, associated with its use. It is the
method, refer to Terminology D123.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use.
4.1 An area of hook surface is applied to an area of loop
2. Referenced Documents
surface with controlled engagement pressure. This combina-
2
2.1 ASTM Standards:
tion is subjected to a dynamic shear force acting parallel to the
D76 Specification for Tensile Testing Machines for Textiles surfaces of the specimens.
D123 Terminology Relating to Textiles
D618 Practice for Conditioning Plastics for Testing
5. Significance and Use
5.1 This test method gives a measure of a key property of
3. Terminology
hook and loop touch fasteners which is of interest to users of
3.1 Definitions:
such devices. This is a means of determining the resistance to
3.1.1 hook and loop fastener—a touch fastener, comprised
separation when forces are applied parallel to the plane of the
of two flexible mating strips, the surface of one mating strip
fastener.
being covered with tiny, stiff protrusions shaped like hooks
5.2 In the case of a dispute arising from differences in
which engage the other mating strip which is covered with
reported test results when using this test method for acceptance
pliable loops.
testing of commercial shipments, the purchaser and the sup-
3.1.1.1 Discussion—This fastener comprises a non-adhesive
plier should conduct comparative tests to determine if there is
method of joining two materials where ready adjustment and
a statistical bias between their laboratories. Competent statis-
removal is desirable and fastening is accomplished by pressing
tical assistance is recommended for the investigation of bias.
the mating strips together and separation is accomplished by
As a minimum, the two parties should take a group of test
simply peeling apart. Terms herein referring to hook and loop
specimens which are as homogenous as possible and which are
fastening systems shall be construed to include other types of
from a lot of hook and loop of the type in question. The test
specimens should then be randomly assigned in equal numbers
1
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
to each laboratory for testing.The average results from the two
and is the direct responsibility of Subcommittee D13.54 on Subassemblies.
laboratories should be compared using Student’s t-test and an
Current edition approved Feb. 1, 2015. Published April 2015. Originally
acceptable probability level chosen by the two parties before
approved in 1991. Last previous edition approved in 2010 as D5169 – 98(2010).
DOI: 10.1520/D5169-98R15.
the testing began. If a bias is found, either its cause must be
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
found and corrected or the purchaser and the supplier must
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
agree to interpret future test results in the light of the known
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. bias.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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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: D5169 − 98 (Reapproved 2010) D5169 − 98 (Reapproved 2015)
Standard Test Method for
Shear Strength (Dynamic Method) of Hook and Loop Touch
1
Fasteners
This standard is issued under the fixed designation D5169; 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 This test method measures the shear strength of hook and loop touch (CRE) fasteners using a recording constant rate of
extension tensile testing machine.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D76 Specification for Tensile Testing Machines for Textiles
D123 Terminology Relating to Textiles
D618 Practice for Conditioning Plastics for Testing
3. Terminology
3.1 Definitions:
3.1.1 hook and loop fastener—a touch fastener, comprised of two flexible mating strips, the surface of one mating strip being
covered with tiny, stiff protrusions shaped like hooks which engage the other mating strip which is covered with pliable loops.
1
This test method is under the jurisdiction of ASTM Committee D13 on Textiles and is the direct responsibility of Subcommittee D13.54 on Subassemblies.
Current edition approved June 1, 2010Feb. 1, 2015. Published September 2010April 2015. Originally approved in 1991. Last previous edition approved in 20042010 as
D5169 – 98(2004).(2010). DOI: 10.1520/D5169-98R10.10.1520/D5169-98R15.
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.
3.1.1.1 Discussion—
This fastener comprises a non-adhesive method of joining two materials where ready adjustment and removal is desirable and
fastening is accomplished by pressing the mating strips together and separation is accomplished by simply peeling apart. Terms
herein referring to hook and loop fastening systems shall be construed to include other types of touch fasteners in which the
fastening strength in the shear mode (that is, against forces applied in the plane of the fastener) substantially exceeds the fastening
strength in the peel mode (that is, against forces applied perpendicular to the planes of the two components of the fastener).
3.1.2 shear strength, n—the resistance to forces that cause, or tend to cause, two contiguous parts of a body to slide relatively
to each other in a direction parallel to their plane of contact.
3.2 For definitions of other textile terms used in this test method, refer to Terminology D123.
4. Summary of Test Method
4.1 An area of hook surface is applied to an area of loop surface with controlled engagement pressure. This combination is
subjected to a dynamic shear force acting parallel to the surfaces of the specimens.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D5169 − 98 (2015)
5. Significance and Use
5.1 This test method gives a measure of a key property of hook and loop touch fasteners which is of interest to users of such
devices. This is a means of determining the resistance to separation when forces are applied parallel to the plane of the fastener.
5.2 In the case of a dispute arising from differences in reported test results when using this test method for acceptance testing
of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias
between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two
parties should take a group of test specimens which are as homogenous as possible and which are from a lot of hook and loop of
the type in question. The test specimens should then be randomly assigned
...