ASTM D7983-17
(Test Method)Standard Test Method for Shrinkage of Carpet Backing Fabrics
Standard Test Method for Shrinkage of Carpet Backing Fabrics
SIGNIFICANCE AND USE
5.1 This test method can be useful in characterizing and comparing shrinkage properties of both primary and secondary backing fabrics. This test method is considered satisfactory for acceptance testing of commercial shipments because current estimates of between-laboratory precision are acceptable, and this test method is commonly used in the trade for acceptance testing.
5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is statistical bias between them using competent statistical assistance. As a minimum, use test samples for such comparative tests that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in the disparate results during initial testing, and that are randomly assigned in equal numbers to each laboratory for testing. The test results from the laboratories should be compared using 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 for that material must be adjusted in consideration of the known bias.
SCOPE
1.1 This test method covers the procedure for evaluating shrinkage, in both wet and dry conditions, of woven, knitted and nonwoven backing fabrics designed for use in the manufacture of pile yarn floor coverings. Determination of carpet backing shrinkage was previously contained within Test Methods D2646. For consistency, Subcommittee D13.21 extracted this portion and created a separate test method.
1.2 The values stated in inch-pound units are to be regarded as the 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 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
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D7983 − 17
Standard Test Method for
1
Shrinkage of Carpet Backing Fabrics
This standard is issued under the fixed designation D7983; 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 4. Summary of Test Method
1.1 This test method covers the procedure for evaluating 4.1 HOT WET Procedure—The backing fabric is first mea-
shrinkage, in both wet and dry conditions, of woven, knitted sured to a specific length in each principle direction.The fabric
and nonwoven backing fabrics designed for use in the manu- then is immersed in hot distilled or deionized water, dried, and
facture of pile yarn floor coverings. Determination of carpet remeasured.Theshrinkageiscalculatedasthechangeinlength
backing shrinkage was previously contained within Test Meth- expressed as a percentage of the length before immersion.
ods D2646. For consistency, Subcommittee D13.21 extracted
4.2 HOT DRY Procedure—The backing fabric is first mea-
this portion and created a separate test method.
sured to a specific length in each principle direction.The fabric
1.2 The values stated in inch-pound units are to be regarded is then exposed to dry heat and remeasured. The shrinkage is
asthestandard.Thevaluesgiveninparenthesesaremathemati- calculated as the change in length expressed as a percentage of
cal conversions to SI units that are provided for information the length before exposure.
only and are not considered standard.
5. Significance and Use
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.1 This test method can be useful in characterizing and
responsibility of the user of this standard to establish appro-
comparing shrinkage properties of both primary and secondary
priate safety and health practices and determine the applica-
backing fabrics. This test method is considered satisfactory for
bility of regulatory limitations prior to use.
acceptance testing of commercial shipments because current
estimates of between-laboratory precision are acceptable, and
2. Referenced Documents
this test method is commonly used in the trade for acceptance
2
testing.
2.1 ASTM Standards:
D123 Terminology Relating to Textiles 5.1.1 If there are differences of practical significance
D1776 Practice for Conditioning and Testing Textiles between reported test results for two laboratories (or more),
D2646 Test Methods for Backing Fabric Characteristics of comparative tests should be performed to determine if there is
Pile Yarn Floor Coverings statistical bias between them using competent statistical assis-
tance. As a minimum, use test samples for such comparative
D5684 Terminology Relating to Pile Floor Coverings
E177 Practice for Use of the Terms Precision and Bias in teststhatareashomogeneousaspossible,drawnfromthesame
lot of material as the samples that resulted in the disparate
ASTM Test Methods
results during initial testing, and that are randomly assigned in
3. Terminology
equal numbers to each laboratory for testing. The test results
from the laboratories should be compared using statistical test
3.1 For definitions of terms relating to Pile Floor Coverings,
for unpaired data at a probability level chosen prior to the
D13.21, refer to Terminology D5684.
testing series. If a bias is found either its cause must be found
3.1.1 The following terms are relevant to this standard:
and corrected, or future test results for that material must be
backing fabric, nonwoven fabric, shrinkage.
adjusted in consideration of the known bias.
3.1.2 For all other terminology related to textiles, refer to
Terminology D123.
6. Sampling
6.1 LotSample—Asalotsampleforacceptancetesting,take
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This test method is under the jurisdiction ofASTM Committee D13 on Textiles
at random the number of rolls or pieces, as directed in an
and is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.
Current edition approved March 1, 2017. Published March 2017. DOI: 10.1520/ applicable material specification or other agreement between
D7983-17
the purchaser and the supplier. Consider the rolls or pieces of
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
material to be the primary sampling units. In the absence of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
such agreement, take one roll or piece from the lot to be tested.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. NOTE 1—An adequate specification or other agreement between the
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