ASTM D6283-98(2003)
(Test Method)Standard Test Method for Tuft Element Length of Uncoated Pile Yarn Floor Coverings
Standard Test Method for Tuft Element Length of Uncoated Pile Yarn Floor Coverings
SCOPE
1.1 This test method covers the measurement of tuft length and pile yarn length of uncoated pile floor coverings.
1.2 Usually the tuft elements measured as directed in this test method will each be bound at only one binding site, but this test method also may be used for tuft elements bound at more than one binding site, provided that every tuft element measured is bound at the same number of binding sites.
1.3 The values stated in SI units are to be regarded as standard. The values stated in inch-pound units are provided as information only and are not exact equivalents. In case of referee decisions, the SI units shall prevail.
1.4 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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Designation:D6283–98 (Reapproved 2003)
Standard Test Method for
Tuft Element Length of Uncoated Pile Yarn Floor Coverings
This standard is issued under the fixed designation D 6283; 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
1.1 This test method covers the measurement of tuft length
and pile yarn length of uncoated pile floor coverings.
1.2 Usually the tuft elements measured as directed in this
test method will each be bound at only one binding site, but
this test method also may be used for tuft elements bound at
more than one binding site, provided that every tuft element
measured is bound at the same number of binding sites.
1.3 The values stated in SI units are to be regarded as
standard.The values stated in inch-pound units are provided as
information only and are not exact equivalents. In case of
referee decisions, the SI units shall prevail.
1.4 This practice does not purport to address all of the
safety concerns, if any, associated with its use. It is the
FIG. 1 Cross-Section of Tufted Pile Yarn Floor Covering
responsibility of the user of this practice to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use.
4.1 The individual tuft elements of like character (cut or
loop, and height) are removed from the test sample and placed,
2. Referenced Documents
one at a time, in a grooved holder that maintains the tuft fibers
2.1 ASTM Standards:
in a straight line while the length of the tuft element is
D 76 Specification for Tensile Testing Machines for Tex-
measured with a graduated scale and a magnifying glass.
tiles
2 4.2 In loop pile yarn floor covering, adjacent elements are
D 123 Terminology Relating to Textiles
first separated by cutting the connecting loops at the midpoint
D 1776 Practice for Conditioning Textiles for Testing
of the bend with sharp scissors before the tuft elements are
D 2904 Practice for Interlaboratory Testing of a Textile Test
withdrawn from the backing fabric.
Method that Produces Normally Distributed Data
D 2906 Practice for Statements on Precision and Bias for
5. Significance and Use
Textiles
5.1 The determination of the tuft length of pile yarn floor
D 5684 TerminologyRelatingtopileYarnFloorCoverings
covering is useful in quality and cost control during the
manufacture of pile yarn floor covering. Both appearance and
3. Terminology
performance can be affected by changes in this characteristic.
3.1 Definitions—For definitions of pile yarn floor covering
5.2 Incasetherearedisputabledifferencesbetweenreported
related terms, refer to Terminology D 5684. For definitions of
test results for two or more laboratories, comparative tests
other textile terms used in this test method, refer to Terminol-
should be performed to determine if there is a statistical bias
ogy D 123.
between them, using competent statistical assistance. At a
minimum, test samples should be used that are as homoge-
neous as possible, that are drawn from the material from which
disputable test results were obtained, and that are assigned
This test method is under the jurisdiction ofASTM Committee D13 onTextiles
and is the direct responsibility of Subcommittee D13.21 on Pile Yarn Floor
randomly in equal numbers to each laboratory for testing. The
Coverings.
testresultsfromthetwolaboratoriesshouldbecomparedusing
Current edition approved June 10, 1998. Published August 1998.
2 a statistical test for unpaired data, at a probability level chosen
Annual Book of ASTM Standards, Vol 07.01.
Annual Book of ASTM Standards, Vol 07.02. prior to the testing series. If a bias is found, either its cause
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6283–98 (2003)
must be found and corrected, or future test results must be 7.4.3 For laboratory samples less than 1500 mm (60 in.)
adjusted in consideration of the known bias. wide, or when a full width is not available, designate one test
sample area that includes the entire piece except no nearer to
6. Apparatus
eitheredgethan5 %ofthewidthofthepileyarnfloorcovering
6.1 Grooved Specimen Holders—The holder shall be of a width.
length at least 10 % longer than the longest tuft element to be
7.5 Test Specimens—For each like characteristic, cut pile,
measured.A100-mm (4-in.) length normally will be adequate. loop pile, and each tuft height of interest randomly select ten
6.1.1 The grooves shall be a V-shaped cross-section with a
test specimens from the laboratory sample as directed in
1.05 rad (60°) angle at the bottom. The depth of the grooves Section 9. A test specimen is one tuft element.
and width across the top of the grooves should accommodate a
7.5.1 Atest result is the average of the measurements made
variety of yarns according to the following example: on a set of ten test specimens for a given characteristic. For test
Yarns Groove Widths, mm (in.) sample areas described in 7.4.1, three sets of ten measurements
Coarse 4.6 (0.18)
are averaged to represent the laboratory sample. For the test
Medium 3.3 (0.13)
sample area described in 7.4.3, one set of ten measurements is
Fine 2.0 (0.08)
averaged to represent the laboratory sample.
6.1.2 Additional grooves of intermediate width also may be
used. 8. Conditioning
6.2 Scale, at least 100 mm (4 in.) long, graduated in 2-mm
8.1 Bring the test sample to moisture equilibrium for testing
(0.10-in.) divisions.
in standard atmosphere for testing textiles approaching equi-
6.2.1 If the scale is not transparent, it shall be no thicker
librium from the dry side without heat. Determine that mois-
than 1 mm (0.04 in.).
ture equilibrium for testing has been attained as directed in
6.3 Cover Plate, clear plastic to be used when nontranspar-
Practice D 1776.
ent scale is used.
6.4 Magnifying Glass,23 to 53, mounted above the holder 9. Tuft Element Selection
to permit centering the glass immediately above the cut ends of
9.1 For each characteristic of interest, select at random ten
the tuft to avoid parallax in reading the scale.
test specimens from each test sample area as described in
6.5 Scissors, with sharp points.
9.2-9.4.
9.2 For laboratory samples having three sample test areas,
7. Sampling
select at random four tuft elements from the middle test sample
7.1 The basic sampling unit of uncoated pile yarn floor
area and three tuft elements from each of the two edge test
covering is a production roll.
sample areas.
7.2 Lot Sample—As a lot sample for acceptance testing,
9.3 For laboratory samples having two sample test areas,
take at random the number of rolls, or pieces, of pile yarn floor
select at random five tuft elements from each edge test sample
covering as directed in an applicable material specification or
area.
other agreement between the purchaser and the supplier.
9.4 For laboratory samples having one sample test area,
Consider the rolls, or pieces, of pile yarn floor covering to be
select at random ten tuft elements from the test sample piece.
the primary sampling units. In the absence of such agreement,
take one roll or piece from the lot to be tested. 10. Procedure
10.1 Select the groove appropriate to the tuft element yarn.
NOTE 1—An agreement between the pu
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