ASTM D7267-19a(2024)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7267 − 19a (Reapproved 2024)
Standard Test Method for
Edge Ravel Resistance of Finished Loop Pile, Pile Yarn
Floor Covering
This standard is issued under the fixed designation D7267; 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 3.2 The following terms are relevant to this standard: carpet,
constant-rate-of-extension, finished, finished pile yarn floor
1.1 This test method covers the determination of the force
covering, floor covering, loop pile yarn floor covering, pile,
required to ravel a straight sewn yarn from the edge of a loop
pile yarn floor covering, textile floor covering, tuft, tuft leg,
pile, textile floor covering.
tufted fabric, edge ravel.
1.2 The values stated in inch-pound units are to be regarded
3.3 For definition of other terms related to textiles, refer to
as standard. The values given in parentheses are mathematical
Terminology D123.
conversions to SI units that are provided for information only
and are not considered standard.
4. Summary of Test Method
1.3 This standard does not purport to address all of the
4.1 A yarn end is raveled from a straight sewn, loop pile
safety concerns, if any, associated with its use. It is the
textile floor covering using a tensile testing machine. The force
responsibility of the user of this standard to establish appro-
required to pull the tufted yarn from the edge of a tufted loop
priate safety, health, and environmental practices and deter-
pile floor covering is measured and recorded. The required load
mine the applicability of regulatory limitations prior to use.
or force to remove the yarn from the specimen is calculated and
1.4 This international standard was developed in accor-
defined as “edge ravel strength.” Floor covering installation
dance with internationally recognized principles on standard-
experts recommend using a seam sealer to secure the cut edges
ization established in the Decision on Principles for the
of a textile floor covering.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5. Significance and Use
Barriers to Trade (TBT) Committee.
5.1 The satisfactory performance of a loop pile floor cover-
2. Referenced Documents
ing depends, to a considerable extent, on the installation and
maintenance of the product. A loop pile floor covering with
2.1 ASTM Standards:
inadequate edge ravel strength may result in loops pulling out
D76/D76M Specification for Tensile Testing Machines for
from the backing, resulting in an aesthetically displeasing
Textiles
appearance. Tuft rows located at the seam of a loop pile floor
D123 Terminology Relating to Textiles
covering are the most susceptible to raveling.
D1776/D1776M Practice for Conditioning and Testing Tex-
tiles
D5684 Terminology Relating to Pile Floor Coverings 6. Apparatus
6.1 Tensile Testing Machine—A constant-rate-of extension
3. Terminology
(CRE) type conforming to Specification D76/D76M, a constant
3.1 For definitions of terms relating to pile floor coverings, rate of speed of 12 in./min 6 0.5 in./min (300 mm/min 6 10
refer to Terminology D5684.
mm/min) is required. Full-scale loads range from 1 lb to 10 lb
(0.545 kg to 4.53 kg) are generally adequate. A constant rate of
traverse (CRT) type tensile testing machine conforming to the
Specification D76/D76M and operated at the same speed is
This test method is under the jurisdiction of ASTM Committee D13 on Textiles
and is the direct responsibility of Subcommittee D13.21 on Pile Floor Coverings.
permitted. There may be no overall correlation with CRE-type
Current edition approved Jan. 1, 2024. Published January 2024. Originally
and CRT-type testing machines. Consequently, the two ma-
approved in 2006. Last previous edition approved in 2019 as D7267–19a. DOI:
chines cannot be used interchangeably. In the case of
10.1520/D7267-19AR24.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or controversy, the CRE-type testing machine shall prevail.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.2 Clamps and Jaw Faces—The use of hydraulic or
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. pneumatic, serrated or padded face, clamping systems with a
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D7267 − 19a (2024)
minimum of 1 in. by 3 in. (25 mm by 75 mm) are recom- 8. Preparation of Apparatus
mended to reduce specimen slippage. The faces shall be
8.1 Tensile Testing Machine—Prepare the machine accord-
parallel and have matching centers with respect to one another
ing to the manufacture’s instructions and using the conditions
(in the same clamp) and to the corresponding jaw face of the
given in 8.1.1 and 8.1.2.
other clamp.
8.1.1 The distance between the clamps should be 1 in.6
0.05 in (25 mm 6 1 mm). Select the “full scale force” range of
7. Sampling, Test Specimens, and Test Units
the testing machine such that the maximum force occurs
7.1 Lot Sample—When performing acceptance testing for a
between 15 % and 85 % of “full scale” force. Verify the testing
sample lot, take at random the number of rolls or pieces of pile
machine for this range.
yarn floor covering as directed on an applicable material
8.1.2 Select a testing machine speed of 12 in. 6 0.5 in.
specification or other agreement between the purchaser and the
(300 mm 6 12 mm)/min.
supplier. Consider the rolls or pieces of pile yarn floor covering
to be the primary sampling units. In the absence of such
9. Conditioning
agreement, take one roll or piece from the lot to be tested.
9.1 Condition the laboratory sampling unit or the test
7.2 Laboratory Sample—The minimum of 18 in. by width
specimens in the standard atmosphere for textile testing for
sampling for a specimen that is only 6 in. (150 mm) long and
12 h or until the mass changes no more than 0.1 % in 2 h as
2 in. wide creates substantial waste and does not add to the
directed in Practice D1776/D1776M.
improvement of the test. It is recommended that the minimum
carpet sample size be 10 in. (254 mm) by width of carpet roll
10. Procedure
or three separate carpet tile samples which allows for less
10.1 Center and secure the length of the test specimen in the
waste and still provides for larger samples if needed.
lower clamps with the trimmed edge facing the top clamp, as
7.3 Test Specimens—From each laboratory sample unit, cut
shown in Fig. 2. Set the distance between
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