ASTM D5170-98(2015)

Standard Test Method for Peel Strength (“T” Method) of Hook and Loop Touch Fasteners

SIGNIFICANCE AND USE
3.1 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 normal to the line of separation of the fastener.  
3.2 The force registered in a peel test is irregular, and as a consequence, empirical methods have had to be developed to obtain usable values related to peel strength. In spite of the empirical nature of the reported values, it is believed they reflect comparative performance of similar touch fasteners tested and measured in the same way.  
3.3 Two optional methods of calculation are provided: integrator average and average of five highest peaks. These test methods are not equivalent. Generally, the integrator average will be lower than the average of the five highest peaks.  
3.4 The highest peaks which reflect the force required to separate a hook and loop closure bear no simple relationship to the average force (integrator average). The average of the five highest peaks better reflect performance but the integrator results may be used to characterize a closure and for quality control purposes. The integrator average is relatively easy to calculate given the proper equipment.  
3.5 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...
SCOPE
1.1 This test method covers the measurement of the peel strength of hook and loop touch fasteners using a recording constant-rate-of-extension tensile testing machine (CRE).  
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 problems, 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: 61.040 - Headgear. Clothing accessories. Fastening of clothing
• 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: D5170 − 98 (Reapproved 2015)
Standard Test Method for
Peel Strength (“T” Method) of Hook and Loop Touch
1
Fasteners
This standard is issued under the fixed designation D5170; 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 methods are not equivalent. Generally, the integrator average
will be lower than the average of the five highest peaks.
1.1 This test method covers the measurement of the peel
strength of hook and loop touch fasteners using a recording
3.4 The highest peaks which reflect the force required to
constant-rate-of-extension tensile testing machine (CRE).
separate a hook and loop closure bear no simple relationship to
the average force (integrator average). The average of the five
1.2 The values stated in inch-pound units are to be regarded
highest peaks better reflect performance but the integrator
as standard. The values given in parentheses are mathematical
results may be used to characterize a closure and for quality
conversions to SI units that are provided for information only
control purposes. The integrator average is relatively easy to
and are not considered standard.
calculate given the proper equipment.
1.3 This standard does not purport to address all of the
safety problems, if any, associated with its use. It is the 3.5 In the case of a dispute arising from differences in
responsibility of the user of this standard to establish appro- reported test results when using this test method for acceptance
priate safety and health practices and determine the applica- testing of commercial shipments, the purchaser and the sup-
plier should conduct comparative tests to determine if there is
bility of regulatory limitations prior to use.
a statistical bias between their laboratories. Competent statis-
2. Referenced Documents
tical assistance is recommended for the investigation of bias.
2
As a minimum, the two parties should take a group of test
2.1 ASTM Standards:
specimens which are as homogenous as possible and which are
D618 Practice for Conditioning Plastics for Testing
from a lot of hook and loop of the type in question. The test
3. Significance and Use specimens should then be randomly assigned in equal numbers
to each laboratory for testing.The average results from the two
3.1 This test method gives a measure of a key property of
laboratories should be compared using Student’s t-test and an
hook and loop touch fasteners which is of interest to users of
acceptable probability level chosen by the two parties before
such devices. This is a means of determining the resistance to
the testing began. If a bias is found, either its cause must be
separation when forces are applied normal to the line of
found and corrected or the purchaser and the supplier must
separation of the fastener.
agree to interpret future test results in the light of the known
3.2 The force registered in a peel test is irregular, and as a
bias.
consequence, empirical methods have had to be developed to
obtain usable values related to peel strength. In spite of the
4. Apparatus
empirical nature of the reported values, it is believed they
4.1 Roller—consisting of a smooth steel surface, approxi-
reflect comparative performance of similar touch fasteners
3 1
mately 4 ⁄4 in. (121 mm) in diameter, 2 ⁄4 in. (57 mm) wide,
tested and measured in the same way.
1
and equipped with a handle, length 4 ⁄8 in. (105 mm), for
3.3 Two optional methods of calculation are provided:
propelling the roller back and forth without adding additional
integrator average and average of five highest peaks.These test
weight to the specimen being rolled (See Fig. 1).The weight of
1
the roller (including the handle) is 11 6 ⁄4 lbs. (4994 g 6 114
1 g).
This test method is under the jurisdiction ofASTM Committee D13 on Textiles
and is the direct responsibility of Subcommittee D13.54 on Subassemblies.
4.2 Testing Machine—A constant rate of extension (CRE)
Current edition approved Feb. 1, 2015. Published April 2015. Originally
tensile tester shall be used. The tester shall have two clamps
approved in 1991. Last previous edition approved in 2010 as D5170 - 98(2010).
DOI: 10.1520/D5170-98R15.
with centers in the same plane, parallel to the direction of the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
motion of the stressing clamp, and so aligned that they will
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
hold the specimen ends wholly in the same plane; a means of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. moving the stres
...

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: D5170 − 98 (Reapproved 2010) D5170 − 98 (Reapproved 2015)
Standard Test Method for
Peel Strength (“T” Method) of Hook and Loop Touch
1
Fasteners
This standard is issued under the fixed designation D5170; 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 covers the measurement of the peel strength of hook and loop touch fasteners using a recording
constant-rate-of-extension tensile testing machine (CRE).
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 problems, 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:
D618 Practice for Conditioning Plastics for Testing
3. Significance and Use
3.1 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 normal to the line of separation of
the fastener.
3.2 The force registered in a peel test is irregular, and as a consequence, empirical methods have had to be developed to obtain
usable values related to peel strength. In spite of the empirical nature of the reported values, it is believed they reflect comparative
performance of similar touch fasteners tested and measured in the same way.
3.3 Two optional methods of calculation are provided: integrator average and average of five highest peaks. These test methods
are not equivalent. Generally, the integrator average will be lower than the average of the five highest peaks.
3.4 The highest peaks which reflect the force required to separate a hook and loop closure bear no simple relationship to the
average force (integrator average). The average of the five highest peaks better reflect performance but the integrator results may
be used to characterize a closure and for quality control purposes. The integrator average is relatively easy to calculate given the
proper equipment.
3.5 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.
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
D5170 - 98(2004).(2010). DOI: 10.1520/D5170-98R10.10.1520/D5170-98R15.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5170 − 98 (2015)
4. Apparatus
3 1
4.1 Roller—consisting of a smooth steel surface, approximately 4 ⁄4 in. (121 mm) in diameter, 2 ⁄4 in. (57 mm) wide, and
1
equipped with a ha
...