ASTM D6859-05
(Test Method)Standard Test Method for Pile Thickness of Finished Level Pile Yarn Floor Coverings
Standard Test Method for Pile Thickness of Finished Level Pile Yarn Floor Coverings
SIGNIFICANCE AND USE
The determination of pile thickness of level pile yarn floor covering is useful in quality and cost control during the manufacture of pile yarn floor covering. The appearance and performance may be affected by changes in pile thickness of pile yarn floor coverings. 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.
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 a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such comparative tests that are as homogenous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, 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 determination of pile thickness of finished level pile yarn floor covering using a thickness measuring instrument having a stationary surface (platen), a circular pressure foot under specified force, and capable of being moved vertically above the platen.
1.2 This test method is applicable only to finished level loop and cut pile constructions with tuft heights less than 6 mm (0.25 in.).Note 1
Determination of pile thickness of finished level pile yarn floor coverings was previously contained within Test Methods D 418. For user convenience, Subcommittee D13.21 subdivided Test Methods D 418 into separate standards of which this test method is one.
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
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Standards Content (Sample)
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Designation:D6859–05
Standard Test Method for
1
Pile Thickness of Finished Level Pile Yarn Floor Coverings
This standard is issued under the fixed designation D6859; 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 3.1.1 The following terms are relevant to this standard:
carpet, finished, finished pile yarn floor covering, floor cover-
1.1 This test method covers the determination of pile
ing,pile,pilethickness,pileyarnfloorcovering,pitch.primary
thickness of finished level pile yarn floor covering using a
backing, shorn pile, stubble, stubble height, textile floor
thickness measuring instrument having a stationary surface
covering, tufted fabric.
(platen), a circular pressure foot under specified force, and
3.2 For all other terminology related to textiles, refer to
capable of being moved vertically above the platen.
Terminology D123.
1.2 Thistestmethodisapplicableonlytofinishedlevelloop
and cut pile constructions with tuft heights less than 6 mm
4. Summary of Test Method
(0.25 in.).
4.1 The total thickness of an unsheared strip specimen is
NOTE 1—Determination of pile thickness of finished level pile yarn
measured as the distance between two parallel plates exerting
floor coverings was previously contained within Test Methods D418. For
a specified pressure on the test specimen. The pile yarn of the
user convenience, Subcommittee D13.21 subdivided Test Methods D418
strip specimen is sheared down to a stubble. The backing
into separate standards of which this test method is one.
thickness of the sheared strip specimen is measured as the
1.3 This standard does not purport to address all of the
distance between two parallel plates exerting a different speci-
safety concerns, if any, associated with its use. It is the
fied pressure on the sheared strip specimen. The difference
responsibility of the user of this standard to establish appro-
between the two measurements is the pile thickness.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Significance and Use
5.1 The determination of pile thickness of level pile yarn
2. Referenced Documents
floor covering is useful in quality and cost control during the
2
2.1 ASTM Standards:
manufacture of pile yarn floor covering. The appearance and
D123 Terminology Relating to Textiles
performance may be affected by changes in pile thickness of
D418 Test Methods of Testing Pile Yarn Floor Covering
pile yarn floor coverings. This test method is considered
Construction
satisfactory for acceptance testing of commercial shipments
D1776 Practice for Conditioning and Testing Textiles
because current estimates of between laboratory precision are
D5684 Terminology Relating to Pile Floor Coverings
acceptable, and this test method is commonly used in the trade
D5823 Test Method forTuft Height of Pile Floor Coverings
for acceptance testing.
E122 Practice for Calculating Sample Size to Estimate,
5.2 If there are differences of practical significance between
With Specified Precision, the Average for a Characteristic
reported test results for two laboratories (or more), compara-
of a Lot or Process
tive tests should be performed to determine if there is a
statistical bias between them, using competent statistical assis-
3. Terminology
tance. As a minimum, use the samples for such comparative
3.1 For definitions of terms relating to Pile Floor Coverings,
tests that are as homogenous as possible, drawn from the same
D13.21, refer to Terminology D5684. See also Annex A1.
lot of material as the samples that resulted in disparate results
during initial testing and randomly assigned in equal numbers
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to each laboratory. The test results from the laboratories
This test method is under the jurisdiction ofASTM Committee D13 onTextiles
and is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.
involved should be compared using a statistical test for
Current edition approved March 1, 2005. Published April 2005. Originally
unpaired data, a probability level chosen prior to the testing
approved in 2003. Last previous edition approved in 2003 as D6859–03. DOI:
series. If a bias is found either its cause must be found and
10.1520/D6859-05.
2
corrected, or future test results for that material must be
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
adjusted in consideration of the known bias.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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