ASTM D2062-03(2009)
(Test Method)Standard Test Methods for Operability of Zippers
Standard Test Methods for Operability of Zippers
SIGNIFICANCE AND USE
The significance of specific tests is discussed in the appropriate sections.
These test methods are considered satisfactory for acceptance testing of commercial shipments of zippers because the methods have been used extensively in the trade for this purpose, even though current estimates of between-laboratory precision are quite large in some cases.
If there are differences of practical significance between reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, the 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 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.
The method(s) in the standard along with those in Test Methods D 2051, D 2052, D 2053, D 2054, D 2057, D 2058, D 2059, D 2060, and D 2061 are a collection of proven test methods. They can be used as aids in the evaluation of zippers without the need for a thorough knowledge of zippers. The enumerated test methods do not provide for the evaluation of all zipper properties. Besides those properties measured by means of the enumerated test methods there are other properties that may be important for the satisfactory performance of a zipper. Test methods for measuring those properties have not been published either because no practical methods have yet been developed or because a valid evaluation of the information resulting from existing unpublished metho...
SCOPE
1.1 These test methods cover procedures for determining the following characteristics of zippers:
Sections Opening and Closing of Zippers14-17 Separator Functioning of Zippers18-22 Sticking of Zippers at Stops10-13
1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this 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.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D2062 − 03(Reapproved 2009)
Standard Test Methods for
Operability of Zippers
This standard is issued under the fixed designation D2062; 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 D2059 Test Method for Resistance of Zippers to Salt Spray
(Fog)
1.1 These test methods cover procedures for determining
D2060 Test Methods for Measuring Zipper Dimensions
the following characteristics of zippers:
D2061 Test Methods for Strength Tests for Zippers
Sections
Opening and Closing of Zippers 14-17 3. Terminology
Separator Functioning of Zippers 18-22
3.1 Definitions:
Sticking of Zippers at Stops 10-13
3.1.1 For definitions of zipper terms used in these test
1.2 The values stated in SI units are to be regarded as the
methods, refer to Terminology D2050. For definitions of other
standard. No other units of measurement are included in this
textile terminology used in these test methods, refer to Termi-
standard.
nology D123.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.1 The significance of specific tests is discussed in the
bility of regulatory limitations prior to use.
appropriate sections.
4.2 These test methods are considered satisfactory for ac-
2. Referenced Documents
ceptance testing of commercial shipments of zippers because
2.1 ASTM Standards:
the methods have been used extensively in the trade for this
D123 Terminology Relating to Textiles
purpose, even though current estimates of between-laboratory
D2050 Terminology Relating to Fasteners and Closures
precision are quite large in some cases.
Used with Textiles
4.2.1 If there are differences of practical significance be-
D2051 Test Method for Durability of Finish of Zippers to
tween reported test results for two laboratories (or more),
Laundering
comparative test should be performed to determine if there is a
D2052 Test Method for Colorfastness of Zippers to Dry-
statistical bias between them, using competent statistical assis-
cleaning
tance. As a minimum, the test samples should be used that are
D2053 Test Method for Colorfastness of Zippers to Light
as homogeneous as possible, that are drawn from the material
D2054 Test Method for Colorfastness of Zipper Tapes to
from which the disparate test results were obtained, and that
Crocking
are randomly assigned in equal numbers to each laboratory for
D2057 Test Method for Colorfastness of Zippers to Laun-
testing. Other materials with established test values may be
dering
used for this purpose.The test results from the two laboratories
D2058 Test Method for Durability of Finish of Zippers to
should be compared using a statistical test for unpaired data, at
Drycleaning
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
These test methods are under the jurisdiction of ASTM Committee D13 on
bias.
Textiles and are the direct responsibility of Subcommittee D13.54 on Subassem-
blies. The methods were developed in cooperation with the Slide Fastener Assn.,
4.3 The method(s) in the standard along with those in Test
Inc.
Methods D2051, D2052, D2053, D2054, D2057, D2058,
Current edition approved July 1, 2009. Published August 2009. Originally
D2059, D2060, and D2061 are a collection of proven test
approved in 1961. Last previous edition approved in 2003 as D2062 – 03. DOI:
10.1520/D2062-03R09.
methods. They can be used as aids in the evaluation of zippers
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
without the need for a thorough knowledge of zippers. The
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
enumerated test methods do not provide for the evaluation of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. all zipper properties. Besides those properties measured by
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D2062 − 03 (2009)
6. Sampling
6.1 LotSample—Asalotsampleforacceptancetesting,take
at random the number of individual containers from each
shipping carton as directed in an applicable material specifi-
cation or other agreement between the purchaser and the
supplier. Consider individual containers from each shipping
carton to be the primary sampling units.
NOTE 1—An adequate specification or other agreement between the
purchaserandsupplierrequirestakingintoaccountthevariabilitybetween
shipping cartons and between zippers in a container to provide a sampling
plan with a meaningful producer’s risk, consumer’s risk, acceptable
quality level, and limiting quality level.
6.2 Laboratory Sample and Test Specimens—As a labora-
tory sample for acceptance testing, take a number of zippers
specified in Section 6 at random from each container in the lot
sample. Consider the zippers as both the laboratory sample and
the test specimens.
7. Number of Specimens
7.1 Variables—Take a number of zippers per individual
container from each shipping carton such that the user may
expect at the 90 % probability level that the test result for an
individual container is no more than 10 % of the average above
or below the true average for the individual container. Deter-
minethenumberofzippersperindividualcontainerasfollows:
7.1.1 Reliable Estimate of v—When there is a reliable
estimate of v based upon extensive past records for similar
materials tested in the users laboratory as directed in the
method, calculate the number of specimens using Eq 1:
2 2 2 2
FIG. 1 Slider Sticking on Bottom Stop n 5 ~t 3v !/A 5 0.0270 3v (1)
where:
n = number of specimens (rounded upward to a whole
number),
means of the enumerated test methods there are other proper-
v = reliable estimate of the coefficient of variation of
ties that may be important for the satisfactory performance of
individual observations on similar materials in the
a zipper. Test methods for measuring those properties have not
users laboratory under conditions of single-
been published either because no practical methods have yet
operator precision,
been developed or because a valid evaluation of the informa-
t = 1.645, the value of student’s t for infinite degrees
tion resulting from existing unpublished methods requires an
of freedom, for two-sided limits, and a 90 %
intimate and thorough knowledge of zippers. 2
probability level (t = 2.706),
A = 10.0 % of the average, the value of the allowable
5. Apparatus
variation, and
2 2
0.0270 = value calculated from t /A .
5.1 Force Indicator (Fig. 1)—A 50-N or 10-lbf capacity
force indicator equipped with a direct-reading dial graduated in
7.1.2 No Reliable Estimate of v—When there is no reliable
0.5-N or 0.1-lbf divisions, a maximum-reading indicator, and a
estimate of v for the users laboratory, Eq 1 should not be used
clamp suitable for attaching the zipper tape ends to the
directly. Instead, specify the fixed numbers of specimens
indicator.
shown in Table 1. These numbers of specimens are calculated
5.2 Spacer—A piece of metal designed to fit in the pin using values of v which are listed in Table 1 and which are
cavity of the fixed retainer of the specimen and having a length somewhat larger values of v than are usually found in practice.
equal to the element pitch of the specimen. When a reliable estimate of v for the users laboratory becomes
available, Eq 1 will usually require fewer specimens than are
5.3 Hooks, suitable for attaching the force indicator to the
listed in Table 1.
slider pull of a specimen.
7.2 Attribute Properties—Unless otherwise agreed upon, as
when specified in an applicable material specification, take the
fixed number of 20 specimens for detecting slider movement
Drawings for the force indicator fixture shown is available from the various
zipper manufacturers upon request. with the pin partially seated or not seated.
D2062 − 03 (2009)
TABLE 1 Specimens Required Under Conditions of Unknown
12.2.1 With the tape ends clamped as shown in Fig. 2, set
Variability in User’s Laboratory, Percent of the Average
the force indicator at zero. Move the slider downward in a
Number of
A vertical plane until it is against or over the bottom stop and
Names of the Properties Basis
Specimens
until a force of 18 N (4 lbf) is registered on the force indicator.
Sticking at top stops 47 ν = 41.3
12.2.2 Without disturbing the slider, secure the bottom tape
Sticking at bottom stops 32 ν = 34.4
Opening zipper 15 ν = 23.4 ends of the specimen in the clamp of the force indicator (see
Closing zipper 27 ν = 31.1 3
Fig. 1) approximately 10 mm ( ⁄8 in.) from the outermost edge
Force to move slider, pin fully seated 43 ν = 39.5
of the bottom stop. Hold the pull of the slider in a horizontal
A
The values of ν in Table 1 are somewhat larger than will usually be found in
plane and move the slider manually downward in a vertical
practice (see 7.1.2).
plane until it is clear of the bottom stop. Note and record the
maximum reading on the force indicator to the nearest 0.5 N or
0.1 lbf.
8. Test Specimen
13. Report
8.1 Each test specimen shall consist of a completely as-
13.1 State that the specimens were tested as directed in
sembled zipper, except that for the opening and closing
Sections 10-13 of ASTM Test Methods D2062. Describe the
method, a length of chain with an appropriate slider may be
material(s) or product(s) sampled and the method of sampling
used. Use a zipper or chain not less than 150 mm (6 in.) long.
used.
13.2 Report the following information:
9. Conditioning
13.2.1 Specific property measured, that is, “sticking at top
9.1 Specimens to be tested by the use of these methods need
stops”, or “sticking at bottom stops,”
no special conditioning. Testing may be conducted under
13.2.2 Observed maximum force required to move the
prevailing room conditions.
slider from the top stops or from the bottom stops for each
specimen tested, and
STICKING OF ZIPPERS AT STOPS
13.2.3 Number of specimens tested.
10. Summary of Test Method
10.1 The slider is pulled against the stops with a prescribed
force after which the force required to move the slider away
from the stops is determined.
11. Significance and Use
11.1 The slider should move away from the stops readily.
The force required to move the slider is, therefore, a measure-
ment of the serviceability of the zipper in end use applications.
12. Procedure
12.1 Top Stop:
12.1.1 Disengage any interfering slider-locking elements.
Secure the bottom tape ends of the completely assembled and
open zipper in the clamp of the force indicator as shown in Fig.
1. Locate the clamp edge approximately 10 mm ( ⁄8 in.) from
the outermost edge of the bottom stop.With the force indicator
set at zero, hold the pull of the slider in a horizontal plane and
move the slider manually downward in a vertical plane against
or over the top stops until a force of 18 N (4 lbf) is registered
on the force indicator. Remove the specimen from the indicator
clamps.
12.1.2 Securethetoptapeendsofthecompletelyassembled
andclosedzipperintheclampoftheforceindicator.Locatethe
clamp jaws 10 mm ( ⁄8 in.) from the outermost component.The
tape ends must touch each other at the point of clamping.
12.1.3 Set the force indicator hand at zero. Hold the pull of
the slider in a horizontal plane and move the slider manually
downward in a vertical plane until it is clear of the top stops.
Record the maximum reading on the force indicator to the
nearest 0.5 N or 0.1 lbf.
12.2 Bottom Stop: FIG. 2 Slider Sticking on Top Stops
D2062 − 03 (2009)
OPENING AND CLOSING OF ZIPPERS 16.1.3 Set the force indicator at zero. Holding the pull of the
slider in a horizontal position, manually move the slider
14. Summary of Test Method downward in a vertical plane at a uniform rate for a distance of
about 125 mm (5 in.) in approximately 3 s. Take care that the
14.1 Using a force indicator, the slider is pulled along the
slider does not strike the bottom stop. Record the maximum
zipper chain alternately in the opening and closing directions
force registered by the force indicator to the nearest 0.5 N or
and the force required to maintain each movement is recorded.
0.1 lbf.
15. Significance and Use
16.2 Closing—Proceedasdirectedin16.1,exceptsecurethe
bottom tape ends in the force indicator clamps (see Fig. 4). In
15.1 The force required to move the slider on the chain is a
the case of a chain specimen, it is not necessary to separate the
measure of the ease with which the zipper will operate in end
chain below the slider before clamping.
use applications.
17. Report
16. Procedure
17.1 State that the specimens were tested as directed in
16.1 Opening:
Sections 14-17 of ASTM Test Methods D2062. Describe the
16.1.1 Disengage all slider locks from the chain, except on
material(s) or product(s) sampled and the method of sampling
automatic locking sliders. Secure the top end of the completely
used.
assembled and closed zipper or chain in the clamp of the force
17.2 Report the following information:
indicator (see Fig. 3) so that the outermost edge of the
17.2.1 Specific property measured, that is, to open and to
outermost top stop is approximately 10 mm ( ⁄8 in.) from the
close the zipper,
edge of the clamp. Hold the pull of the slider in a horizontal
17.2.2 Maximum forces required for opening zipper and for
plane and move the slider downward manually to a position
closing zipper for each specimen tested, and
approximately 12 mm (0.5 in.) away from the top stops as
17.2.3 Number of specimens tested.
shown in Fig. 3.
16.1.2 In the case of a chain specimen, separate a portion of
SEPARATOR FUNCTIONING OF ZIPPERS
the chain above the slider and secure it in the force indicator
clamp with the elements touching. Position the slider so that its
18. Summary of Test Method
top is approximately 25 mm (1 in.) below the bottom edges of
18.1 The slider, chain, and separable unit are placed in
the clamp.
various relationships to each other and the force required to
move the slider is determined with the aid of a force indicator.
FIG. 3 Chain Opening FIG. 4 Chain Closing
D2062 − 03 (2009)
19. Significance and Use
19.1 T
...
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.
´1
Designation:D2062–87 (Reapproved 1997) Designation:D2062–03 (Reapproved
2009)
Standard Test Methods for
Operability of Zippers
This standard is issued under the fixed designation D 2062; 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.
´ NOTE—Editorial changes were made throughout March 1998.
1. Scope
1.1 These test methods cover procedures for determining the following characteristics of zippers:
Sections
Opening and Closing of Zippers 14-17
Separator Functioning of Zippers 18-22
Sticking of Zippers at Stops 10-13
1.2The values stated in SI units are to be regarded as the standard.
1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this 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
2.1 ASTM Standards:
D 123 Terminology Relating to Textiles
D 2050 Terminology Relating to Zippers Subassemblies
D 2051 Test Method for Durability of Finish of Zippers to Laundering
D 2052 Test Method for Colorfastness of Zippers to Drycleaning
D 2053 Test Method for Colorfastness of Zippers to Light
D 2054 Test Method for Colorfastness of Zipper Tapes to Crocking
D 2057 Test Method for Colorfastness of Zippers to Laundering
D 2058 Test Method for Durability of Finish of Zippers to Drycleaning
D 2059 Test Method for Resistance of Zippers to Salt Spray (Fog)
D 2060 Test Methods for Measuring Zipper Dimensions
D 2061 Test Methods for Strength Tests for Zippers
3. Terminology
3.1 Definitions:
3.1.1 For definitions of zipper terms used in this standard these test methods, refer to Terminology D 2050. For definitions of
other textile terminology used in this standardthese test methods, refer to Terminology D 123.
4. Significance and Use
4.1 The significance of specific tests is discussed in the appropriate sections.
4.2 These test methods are considered satisfactory for acceptance testing of commercial shipments of zippers because the
methods have been used extensively in the trade for this purpose, even though current estimates of between-laboratory precision
are quite large in some cases.
4.2.1In case of a dispute arising from differences in reported test results when using Test Methods D2062 for acceptance testing
These test methods are under the jurisdiction of ASTM Committee D-13 D13 on Textiles and are the direct responsibility of Subcommittee D13.54 on Subassemblies
. The methods were developed in cooperation with the Slide Fastener Assn., Inc.
Current edition approved Feb. 27, 1987. Published April 1987. Originally published as D2062–61T. Last previous edition D2062–81.
Current edition approved July 1, 2009. Published August 2009. Originally approved in 1961. Last previous edition approved in 2003 as D 2062 – 03.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 07.01.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.
D2062–03 (2009)
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 that are as homogeneous as possible and that are from a lot of material 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 for unpaired data and an acceptable probability level
chosenbythetwopartiesbeforethetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaser
and the supplier must agree to interpret future test results in the light of the known bias.
4.2.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative
test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a
minimum, the test samples should be used that are as homogeneous as possible, that are drawn from the material from which the
disparatetestresultswereobtained,andthatarerandomlyassignedinequalnumberstoeachlaboratoryfortesting.Othermaterials
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.
4.3The method(s) in the standard along with those in Test Methods D2051, D2052, D2053, D2054, D2057, D2058, D2059,
D2060, and D2061
4.3 Themethod(s)inthestandardalongwiththoseinTestMethodsD 2051,D 2052,D 2053,D 2054,D 2057,D 2058,D 2059,
D 2060, and D 2061 are a collection of proven test methods.They can be used as aids in the evaluation of zippers without the need
for a thorough knowledge of zippers. The enumerated test methods do not provide for the evaluation of all zipper properties.
Besides those properties measured by means of the enumerated test methods there are other properties that may be important for
the satisfactory performance of a zipper. Test methods for measuring those properties have not been published either because no
practical methods have yet been developed or because a valid evaluation of the information resulting from existing unpublished
methods requires an intimate and thorough knowledge of zippers.
FIG. 1 Slider Sticking on Bottom Stop
D2062–03 (2009)
5. Apparatus
5.1 Force Indicator (Fig. 1)—A50-N or 10-lbf capacity force indicator equipped with a direct-reading dial graduated in 0.5-N
or 0.1-lbf divisions, a maximum-reading indicator, and a clamp suitable for attaching the zipper tape ends to the indicator.
5.2 Spacer—A piece of metal designed to fit in the pin cavity of the fixed retainer of the specimen and having a length equal
to the element pitch of the specimen.
5.3 Hooks, suitable for attaching the force indicator to the slider pull of a specimen.
6. Sampling
6.1 Lot Sample—As a lot sample for acceptance testing, take at random the number of individual containers from each shipping
carton as directed in an applicable material specification or other agreement between the purchaser and the supplier. Consider
individual containers from each shipping carton to be the primary sampling units.
NOTE 1—Anadequatespecificationorotheragreementbetweenthepurchaserandsupplierrequirestakingintoaccountthevariabilitybetweenshipping
cartons and between zippers in a container to provide a sampling plan with a meaningful producer’s risk, consumer’s risk, acceptable quality level, and
limiting quality level.
6.2 Laboratory Sample and Test Specimens—As a laboratory sample for acceptance testing, take a number of zippers specified
in Section 6 at random from each container in the lot sample. Consider the zippers as both the laboratory sample and the test
specimens.
7. Number of Specimens
7.1 Variables—Take a number of zippers per individual container from each shipping carton such that the user may expect at
the 90 % probability level that the test result for an individual container is no more than 10 % of the average above or below the
true average for the individual container. Determine the number of zippers per individual container as follows:
7.1.1 Reliable Estimate of v—When there is a reliable estimate of v based upon extensive past records for similar materials
tested in the user’susers laboratory as directed in the method, calculate the number of specimens using Eq 1:
2 2 2 2
n 5 ~t 3 v !!/A 5 0.0270 3 v (1)
2 2 2 2
n 5 ~t 3 v !!/A 5 0.0270 3 v (1)
where:
n = number of specimens (rounded upward to a whole number),
v = reliable estimate of the coefficient of variation of individual observations on similar materials in the user’susers
laboratory under conditions of single-operator precision,
t = 1.645, the value of student’s t for infinite degrees of freedom, for two-sided limits, and a 90 % probability level
(t = 2.706),
A = 10.0 % of the average, the value of the allowable variation, and
2 2
0.0270 = value calculated from t /A .
7.1.2 No Reliable Estimate of v—When there is no reliable estimate of v for the user’susers laboratory, Eq 1 should not be used
directly. Instead, specify the fixed numbers of specimens shown in Table 1. These numbers of specimens are calculated using
valuesof vwhicharelistedinTable1andwhicharesomewhatlargervaluesof vthanareusuallyfoundinpractice.Whenareliable
estimate of v for the user’susers laboratory becomes available, Eq 1 will usually require fewer specimens than are listed in Table
1.
7.2 Attribute Properties—Unlessotherwiseagreedupon,aswhenspecifiedinanapplicablematerialspecification,takethefixed
number of 20 specimens for detecting slider movement with the pin partially seated or not seated.
8. Test Specimen
8.1 Each test specimen shall consist of a completely assembled zipper, except that for the opening and closing method, a length
Drawings for the force indicator fixture shown is available from the various zipper manufacturers upon request.
TABLE 1 Specimens Required Under Conditions of Unknown
Variability in User’s Laboratory, Percent of the Average
Number of
A
Names of the Properties Basis
Specimens
Sticking at top stops 47 n = 41.3
Sticking at bottom stops 32 n = 34.4
Opening zipper 15 n = 23.4
Closing zipper 27 n = 31.1
Force to move slider, pin fully seated 43 n = 39.5
A
The values of n in Table 1 are somewhat larger than will usually be found in
practice (see 7.1.2).
D2062–03 (2009)
of chain with an appropriate slider may be used. Use a zipper or chain not less than 150 mm (6 in.) long.
9. Conditioning
9.1 Specimenstobetestedbytheuseofthesemethodsneednospecialconditioning.Testingmaybeconductedunderprevailing
room conditions.
STICKING OF ZIPPERS AT STOPS
10. Summary of Test Method
10.1 The slider is pulled against the stops with a prescribed force after which the force required to move the slider away from
the stops is determined.
11. Significance and Use
11.1 The slider should move away from the stops readily. The force required to move the slider is, therefore, a measurement
of the serviceability of the zipper in end use applications.
12. Procedure
12.1 Top Stop:
12.1.1 Disengage any interfering slider-locking elements. Secure the bottom tape ends of the completely assembled and open
zipper in the clamp of the force indicator as shown in Fig. 1. Locate the clamp edge approximately 10 mm ( ⁄8 in.) from the
outermost edge of the bottom stop. With the force indicator set at zero, hold the pull of the slider in a horizontal plane and move
the slider manually downward in a vertical plane against or over the top stops until a force of 18 N (4 lbf) is registered on the force
indicator. Remove the specimen from the indicator clamps.
12.1.2 Secure the top tape ends of the completely assembled and closed zipper in the clamp of the force indicator. Locate the
clamp jaws 10 mm ( ⁄8 in.) from the outermost component. The tape ends must touch each other at the point of clamping.
12.1.3 Set the force indicator hand at zero. Hold the pull of the slider in a horizontal plane and move the slider manually
downward in a vertical plane until it is clear of the top stops. Record the maximum reading on the force indicator to the nearest
0.5 N or 0.1 lbf.
12.2 Bottom Stop:
12.2.1 With the tape ends clamped as shown in Fig. 2, set the force indicator at zero. Move the slider downward in a vertical
plane until it is against or over the bottom stop and until a force of 18 N (4 lbf) is registered on the force indicator.
12.2.2 Without disturbing the slider, secure the bottom tape ends of the specimen in the clamp of the force indicator (see Fig.
1) approximately 10 mm ( ⁄8 in.) from the outermost edge of the bottom stop. Hold the pull of the slider in a horizontal plane and
move the slider manually downward in a vertical plane until it is clear of the bottom stop. Note and record the maximum reading
on the force indicator to the nearest 0.5 N or 0.1 lbf.
13. Report
13.1 State that the specimens were tested as directed in Sections 10-13 ofASTMTest Methods D 2062. Describe the material(s)
or product(s) sampled and the method of sampling used.
13.2 Report the following information:
13.2.1 Specific property measured, that is, “sticking at top stops”, or “sticking at bottom stops,”
13.2.2 Observed maximum force required to move the slider from the top stops or from the bottom stops for each specimen
tested, and
13.2.3 Number of specimens tested.
OPENING AND CLOSING OF ZIPPERS
14. Summary of Test Method
14.1 Using a force indicator, the slider is pulled along the zipper chain alternately in the opening and closing directions and the
force required to maintain each movement is recorded.
15. Significance and Use
15.1 The force required to move the slider on the chain is a measure of the ease with which the zipper will operate in end use
applications.
16. Procedure
16.1 Opening:
16.1.1 Disengage all slider locks from the chain, except on automatic locking sliders. Secure the top end of the completely
assembled and closed zipper or chain in the clamp of the force indicator (see Fig. 3) so that the outermost edge of the outermost
D2062–03 (2009)
FIG. 2 Slider Sticking on Top Stops
top stop is approximately 10 mm ( ⁄8 in.) from the edge of the clamp. Hold the pull of the slider in a horizontal plane and move
the slider downward manually to a position approximately 12 mm (0.5 i
...
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