ASTM D5171-15(2020)
(Test Method)Standard Test Method for Impact Resistance of Plastic Sew-Through Buttons
Standard Test Method for Impact Resistance of Plastic Sew-Through Buttons
SIGNIFICANCE AND USE
5.1 This test method may be used to determine the ability of a button to resist breaking under impact, for example in pressing the end item, which could cause the button to fail.
Note 1: In the development of this test method it was found that the following factors influenced the ability of a button to resist failure under impact conditions: resin formulation, shape ligne size, thickness, number and spacing of holes. Buttons may also pass this test but fail during the pressing of a garment due to the presence of heat during pressing.
5.1.1 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 rest 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 from 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.
5.2 Test Method D5171 for the determination of the impact resistance of buttons may be used for acceptance testing of commercial shipments of buttons but caution is advisable since information is lacking on precision.
SCOPE
1.1 This test method covers the determination of impact resistance of plastic sew-through buttons.
1.2 The values stated in either acceptable metric units or other units shall be regarded separately as standard. The values expressed in each system may or may not be exact equivalents: therefore, each system must be used independently of the other, without combining values in any way.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5171 − 15 (Reapproved 2020)
Standard Test Method for
Impact Resistance of Plastic Sew-Through Buttons
This standard is issued under the fixed designation D5171; 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 3.1.2 For other textile terminology used in this test method,
refer to Terminology D123.
1.1 This test method covers the determination of impact
resistance of plastic sew-through buttons.
4. Summary of Test Method
1.2 The values stated in either acceptable metric units or
4.1 Individual buttons are placed on a surface centered
other units shall be regarded separately as standard.The values
under a tube through which a preselected mass falls from a
expressed in each system may or may not be exact equivalents:
preselected height. After the mass impacts the button the
therefore,eachsystemmustbeusedindependentlyoftheother,
impacted button is removed and visually examined using a 5X
without combining values in any way.
magnifying glass for breakage, cracking, or chipping.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 This test method may be used to determine the ability of
priate safety, health, and environmental practices and deter-
a button to resist breaking under impact, for example in
mine the applicability of regulatory limitations prior to use.
pressing the end item, which could cause the button to fail.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
NOTE 1—In the development of this test method it was found that the
ization established in the Decision on Principles for the following factors influenced the ability of a button to resist failure under
impact conditions: resin formulation, shape ligne size, thickness, number
Development of International Standards, Guides and Recom-
and spacing of holes. Buttons may also pass this test but fail during the
mendations issued by the World Trade Organization Technical
pressing of a garment due to the presence of heat during pressing.
Barriers to Trade (TBT) Committee.
5.1.1 If there are differences of practical significance be-
tween the reported test results for two laboratories (or more),
2. Referenced Documents
comparative tests should be performed to determine if there is
2.1 ASTM Standards:
a statistical bias between them, using competent statistical
D123 Terminology Relating to Textiles
assistance.As a minimum, test samples should be used that are
D618 Practice for Conditioning Plastics for Testing
as homogeneous as possible, that are drawn from the material
D2050 Terminology Relating to Subassemblies Used in the
from which the disparate rest results were obtained, and that
Manufacture of Textiles
are randomly assigned in equal numbers to each laboratory for
testing. Other materials with established test values may be
3. Terminology
used for this purpose.The test results from the two laboratories
3.1 Definitions:
should be compared using a statistical test for unpaired data, at
3.1.1 For definitions of button terms used in this test
a probability level chosen prior to the testing series. If a bias is
method, refer to Terminology D2050.
found, either its cause must be found and corrected, or future
3.1.1.1 The following terms are relevant to this standard:
test results must be adjusted in consideration of the known
button, face, impact resistance, ligne size, sew-through flange
bias.
buttons.
5.2 Test Method D5171 for the determination of the impact
resistance of buttons may be used for acceptance testing of
This test method is under the jurisdiction ofASTM Committee D13 on Textiles commercial shipments of buttons but caution is advisable since
and is the direct responsibility of Subcommittee D13.54 on Subassemblies.
information is lacking on precision.
Current edition approved Feb. 1, 2020. Published February 2020. Originally
approved in 1991. Last previous edition approved in 2015 as D5171–15. DOI:
6. Apparatus
10.1520/D5171-15R20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Impact Resistance Testing Machine—The impact resis-
contact ASTM Customer Service at service@astm.org. F
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