ASTM D7330-07
(Test Method)Standard Test Method for Assessment of Surface Appearance Change in Pile Floor Coverings Using Standard Reference Scales
Standard Test Method for Assessment of Surface Appearance Change in Pile Floor Coverings Using Standard Reference Scales
SIGNIFICANCE AND USE
The determination of surface appearance change in pile yarn floor covering is useful in quality and cost control during manufacture of pile yarn floor covering. 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 trade for acceptance testing.
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, 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 is desparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved shall 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.
TABLE 1 Pile Floor Covering Appearance Change Scales Currently Available ScaleDescription CRI-1Saxony Cut Pile CRI-2Berber, Loop Pile CRI-3Commercial Loop Pile, Low Profile CRI-4Cut Pile Commercial Plush CRI-5Cut Pile Shag CRI-6Tip Sheared Cut and Loop Pile With Pattern
SCOPE
1.1 This test method covers the assessment of changes of surface appearance of pile floor coverings after exposure to actual or simulated foot traffic. This test method applies to pile yarn floor coverings that are, or have been, installed; laboratory floor-trafficked samples; or textiles floor coverings trafficked by mechanical traffic simulators. The subjective assessment is facilitated by use of reference scales that are based on digital images of representative pile yarn floor covering styles and constructions.
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:D7330–07
Standard Test Method for
Assessment of Surface Appearance Change in Pile Floor
1
Coverings Using Standard Reference Scales
This standard is issued under the fixed designation D 7330; 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 E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This test method covers the assessment of changes of
surface appearance of pile floor coverings after exposure to
3. Terminology
actual or simulated foot traffic. This test method applies to pile
3.1 For definitions of terms relating to Pile Floor Coverings,
yarnfloorcoveringsthatare,orhavebeen,installed;laboratory
refer to the Terminology D 5684.
floor-trafficked samples; or textiles floor coverings trafficked
3.2 Thefollowingtermsarerelevanttothisstandard:carpet,
by mechanical traffic simulators. The subjective assessment is
crushing cut pile yarn floor covering, finished, finished pile
facilitated by use of reference scales that are based on digital
yarn floor covering, loss of tuft definition, matting, pile, pile
images of representative pile yarn floor covering styles and
yarn floor covering, textile floor covering.
constructions.
3.3 For definitions of other terms related to textiles, refer to
1.2 This standard does not purport to address all of the
Terminology D 123.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 The floor covering shall be tested in a mechanical wear
bility of regulatory limitations prior to use.
simulator or tested under controlled laboratory foot traffic tests
2. Referenced Documents referenced in Practices D 5251, D 5252, D 5417,D6119, and
2 D 6962. The tested floor covering shall then be assessed for
2.1 ASTM Standards:
surface appearance change by comparing unexposed controls
D 123 Terminology Relating to Textiles
to the exposed sample by using the appropriate Appearance
D 5251 Practice for the Operation of the Tetrapod Walker
Change Grading Scale.
Drum Tester
D 5252 Practice for the Operation of the Hexapod Tumble
5. Significance and Use
Drum Tester
5.1 The determination of surface appearance change in pile
D 5417 Practice for Operation of the Vettermann Drum
yarn floor covering is useful in quality and cost control during
Tester
manufacture of pile yarn floor covering. This test method is
D 5684 Terminology Relating to Pile Floor Coverings
considered satisfactory for acceptance testing of commercial
D6119 Practice for Creating Surface Appearance Changes
shipments because current estimates of between laboratory
in Pile Yarn Floor Covering from Foot Traffic
precision are acceptable, and this test method is commonly
D 6962 Practice for Operation of a Roller Chair Tester for
used in trade for acceptance testing.
Pile Yarn Floor Coverings
5.2 If there are differences of practical significance between
reported test results for two laboratories ( or more), compara-
1 tive test should be performed to determine if there is a
This test method is under the jurisdiction ofASTM Committee D13 onTextiles
statistical bias between them, using competent statistical assis-
and is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.
Current edition approved May 1, 2007. Published June 2007.
tance. As a minimum, use the samples for such comparative
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tests that are as homogenous as possible, drawn from the same
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
lot of material as the samples that resulted is desparate results
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. during initial testing and randomly assigned in equal numbers
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D7330–07
TABLE 1 Pile Floor Covering Appearance Change Scales
from the specimen. Assessors shall observe specimens from
Currently Available
various directions and rate the highest degree of surface
Scale Description
change.
CRI-1 Saxony Cut Pile
9.5 Each assessor shall grade each specimen independently
CRI-2 Berber, Loop Pile
of the other assessors.
CRI-3 Commercial Loop Pile, Low Profile
CRI-4 Cut Pile Commercial Plush
10. Calculation or Interpretation of Results
CRI-5 Cut Pile Shag
CRI-6 Tip Sheared Cut and Loop Pile
...
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