ASTM D5278-92

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Designation: D 5278 – 92
Standard Test Method for
Elongation of Narrow Elastic Fabrics (Static-Load Testing)
This standard is issued under the fixed designation D 5278; 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 D 4964 Test Method for Tension and Elongation of Elastic
Fabrics (Constant-Rate-of-Extension Type Tensile Testing
1.1 This test method determines the elongation characteris-
Machine)
tics of narrow elastic fabrics made from natural or man-made
2.2 AATCC Test Method:
elastomers, either alone or in combination with other textile
135 Dimensional Changes in Automatic Home Laundering
fibers, when tested with a static load testing procedure before
of Woven and Knit Fabrics
or after laundering.
NOTE 1—For determination of similar characteristics using the 3. Terminology
constant-rate-of-extension (CRE) type tensile testing machine, refer to
3.1 Definitions:
Test Method D 4964.
3.1.1 elongation, n—the ratio of the extension of a material
NOTE 2—For determination of similar characteristics using the
to the length of the material prior to stretching. (Compare
constant-rate-of load (CRL) type tensile testing machine, refer to Test
extension.)
Method D 1775.
3.1.2 marrow elastic fabric, n—an elastic fabric that is less
1.2 The use of this test method requires the selection of, or
than 150 mm [6 in.] in width.
mutual agreement upon, the effective static load at which the
3.1.3 static load, n—in textile testing, a mass which exerts
test results will be determined.
a force by means of the mass alone without motion (synonym,
1.3 Laundering procedures used will be those specified in
dead load).
Test Method AATCC 135 for 3 washing and drying cycles.
1.4 The values stated in either inch-pound units or SI units
4. Summary of Test Method
are to be regarded separately as standard. Within the text, the
4.1 Conditioned test specimens, laundered or unlaundered,
inch-pound units are shown in brackets. The values stated in
are suspended and subjected to a specified loading. The static
each system are not exact equivalents; therefore, each system
load is applied for a specified time, released, and the cycle
shall be used independently of the other. Combining values
repeated two more times. The percent elongation is read
from the two systems may result in nonconformance with the
directly from the scale on the apparatus.
specifications.
1.5 This standard does not purport to address all of the
5. Significance and Use
safety problems, if any, associated with its use. It is the
5.1 This test method is considered satisfactory for accep-
responsibility of the user of this standard to establish appro-
tancetestingofcommercialshipmentsofnarrowelasticfabrics
priate safety and health practices and determine the applica-
because the test method is used in the trade for acceptance
bility of regulatory limitations prior to use.
testing.
5.1.1 In case of a dispute arising from differences in
2. Referenced Documents
reported test results when using this test method for acceptance
2.1 ASTM Standards:
testing of commercial shipments, the parties should conduct
D 123 Terminology Relating to Textile Materials
comparative tests to determine if there is a statistical bias
D 1775 Test Method for Tension and Elongation of Wide
between their laboratories. Competent statistical assistance is
Elastic Fabrics
recommended for the investigation of bias.As a minimum, the
D 1776 Practice for Conditioning Textiles for Testing
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
ThistestmethodisunderthejurisdictionofASTMCommitteeD-13onTextiles
and is the direct responsibility of Subcommittee D13.59 on Fabric Test Methods,
General. Annual Book of ASTM Standards, Vol 07.02.
Current edition approved Sept. 15, 1992. Published November 1992. Available from American Association of Textile Chemists and Colorists, P.O.
Annual Book of ASTM Standards, Vol 07.01. Box 12215, Research Triangle Park, NC 27709.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 5278
randomly assigned in equal numbers to each laboratory for Unless the fabric width exceeds 75 mm [3 in.], use the full
testing.Theaverageresultsfromthetwolaboratoriesshouldbe fabric width as the test specimen width.
compared using student’s t-test for unpaired data and an 8.1.3.2 With the bench marker, make two marks on the test
acceptable probability level chosen by the two parties before specimen that are 250 mm [10 in.] apart, approximately the
testingisbegun.Ifbiasisfound,eitherthecausemustbefound samedistancefromthetestspecimenendsandperpendicularto
and corrected or the purchaser and the supplier must agree to the long direction of the test specimen.
interpret future test results in the light of the known bias.
9. Conditioning
5.2 This test method specifies the use of a static load
apparatus. Users of this test method are
...