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ASTM D6644-01(2002)

(Test Method)

Standard Test Method for Tension Strength of Sew-Through Flange Buttons

Standard Test Method for Tension Strength of Sew-Through Flange Buttons

SCOPE
1.1 This test method measures the resistance of the bridge of a sew-through button to a steadily increasing strain.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. Within the text, the inch-pound units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the practice.
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
09-Mar-2001
ICS
19.060 - Mechanical testing
59.020 - Processes of the textile industry
Technical Committee
D13 - Textiles
Drafting Committee
D13.54 - Subassemblies
Current Stage
Ref Project

Relations

Replaces
ASTM D6644-01 - Standard Test Method for Tension Strength of Sew-Through Flange Buttons
Effective Date
10-Mar-2001
Replaced By
ASTM D6644-01(2007) - Standard Test Method for Tension Strength of Sew-Through Flange Buttons
Effective Date
01-Jul-2007

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ASTM D6644-01(2002) - Standard Test Method for Tension Strength of Sew-Through Flange ButtonsASTM D6644-01(2002) - Standard Test Method for Tension Strength of Sew-Through Flange Buttons
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ASTM D6644-01(2002) - Standard Test Method for Tension Strength of Sew-Through Flange Buttons
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D6644–01 (Reapproved 2002)
Standard Test Method for
1
Tension Strength of Sew-Through Flange Buttons
This standard is issued under the fixed designation D 6644; 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 5.2 If there are differences of practical significance between
the reported test results for two laboratories (or more), com-
1.1 Thistestmethodmeasurestheresistanceofthebridgeof
parative tests should be performed to determine if there is a
a sew-through button to a steadily increasing strain.
statistical bias between them, using competent statistical assis-
1.2 The values stated in either SI units or inch-pound units
tance. As a minimum, test samples should be used that are as
are to be regarded separately as the standard. Within the text,
homogeneous as possible, that are drawn from the material
the inch-pound units are shown in parentheses. The values
from which the disparate test results were obtained, and that
stated in each system are not exact equivalents; therefore, each
are randomly assigned in equal numbers to each laboratory for
system shall be used independently of the other. Combining
testing, Other materials with established test values may be
values from the two systems may result in nonconformance
used for this purpose. The test results for the two laboratories
with the practice.
should be compared using a statistical test for unpaired data, at
1.3 This standard does not purport to address all of the
a probability level chosen prior to the testing series. If a bias is
safety concerns, if any, associated with its use. It is the
found, either its cause must be found and corrected, or future
responsibility of the user of this standard to establish appro-
test results must be adjusted in consideration of the known
priate safety and health practices and determine the applica-
bias.
bility of regulatory limitations prior to use.
6. Apparatus
2. Referenced Documents
6.1 Force Gauge—One capable of measuring 20 kg (44 lbs)
2.1 ASTM Standards:
of tension or compression with an accuracy of 6 0.1 kg (6
D 76 Specification for Tensile Testing Machines for Tex-
2
0.22 lbs). The gauge may be hand held or specially mounted.
tiles
2 6.2 Testing Machine—A constant rate of extension (CRE)
D 1776 Practice for Conditioning Textiles
3
Tester shall be used. The capacity of the machine must be
D 5497 Terminology Relating to Buttons
selected for the break position on the gauge to fall within
3. Terminology
20-90 % of full scale.
6.3 Jaw Clamping Fixture—One capable of firmly holding
3.1 For button definitions, refer to Terminology D 5497.
the button, such as a long nose locking wrench or a 3-pronged
4. Summary of Test Method
clamping device.
6.4 Commercial Sewing Machine—One capable of auto-
4.1 The sew-through flange button is sewn onto fabric and
matically sewing the button to. two or more layers of fabric.
positioned in a clamping fixture. The combination is subjected
to a strain recorded on a force gauge.
7. Sampling
4.2 Tests are made on sew through flange buttons before
7.1 Laboratory Sample—Randomly select quantity of but-
launderingordrycleaningwiththeoptionoftestingagainafter
tons, approximately 100-200, from the same carton and from
a predetermined number of launderings or dry cleanings.
boxes within that carton that adequately represent the material
5. Significance and Use
from which test specimens may be chosen.
7.2 Test Specimens—Randomly select 15-25 buttons from
5.1 This test measures an important property to users of sew
the laboratory sample for testing, if test specimens are submit-
through flange buttons. This is a means of determining the
ted for preproduction approval, testing 15 buttons is accept-
resistance of the bridge of the button to a strain which can
able.
cause it to fall off a garment to which it is attached.
8. Conditioning
1
This test method is under the jurisdiction ofASTM Committee D13 onTextiles
8.1 Condition the specimens as directed in practice D 618
and is the direct responsibility of Subcommittee D13.54 on Subassemblies.
using procedure E. Following conditioning prepare the speci-
Current edition approved March 10, 2001. Published May 2001.
2 mens as instructed in 9.4 of practice D 618. Preconditioning is
Annual Book of ASTM Standards, Vol 07.01.
3
Annual Book of ASTM Standards, Vol 07.02. not required.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D6644
position the attachment of he fixture so as not to affect the
structura
...

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5.1 This test measures an important property to users of sew through flange buttons. This is a means of determining the resistance of the bridge of the button to a strain which can cause it to fall off a garment to which it is attached.  
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5.1 This test measures an important property to users of sew through flange buttons. This is a means of determining the resistance of the bridge of the button to a strain which can cause it to fall off a garment to which it is attached.  
5.2 If there are differences of practical significance between the reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, test samples should be used that are as homogeneous as possible, that are drawn from the material from which the disparate test results were obtained, and that are randomly assigned in equal numbers to each laboratory for testing, Other materials with established test values may be used for this purpose. The test results for the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results must be adjusted in consideration of the known bias.
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