ASTM D6077-00(2005)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation:D6077–00(Reapproved2005)
Standard Test Method for
Trapezoid Tearing Strength of Leather
This standard is issued under the fixed designation D6077; 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 the specimen is obtained from the load-elongation (stress-
strain) curve recorded autographically.
1.1 This test method covers the measurement of the tearing
load of nonwoven fabrics by the trapezoid method for leather.
4. Significance and Use
See Test Methods D1117. This test method does not apply to
4.1 The trapezoid tearing load is a tension test in which the
wet blue.
strength is determined primarily by the fibers of the composite
1.2 The values stated in SI units are to be regarded as the
structure and their bonding or interlocking. It is useful for
standard. The values given in parentheses are for information
estimating relative ease of tearing of nonwoven fabrics.
only.
4.2 The procedure can also be used to determine if there is
1.3 This standard does not purport to address all of the
any appreciable difference in the relative strength of the fabric
safety concerns, if any, associated with its use. It is the
in the machine and cross-machine directions.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Apparatus
bility of regulatory limitations prior to use.
5.1 Tensile Testing Machine, constant-rate-of-traverse type,
2. Referenced Documents equipped with an autographic recorder to register the applied
2 load.
2.1 ASTM Standards:
5.2 Clamps, with faces measuring 25 by 75 mm (1 by 3 in.)
D1117 Guide for Evaluating Nonwoven Fabrics
with the longer dimension perpendicular to the direction of
D1610 Practice for Conditioning Leather and Leather Prod-
application of the load.
ucts for Testing
5.3 Template,optional,havingthedimensionsshowninFig.
3. Summary of Test Method 1.
5.4 Pawls, bolt on a machine to allow motion in only one
3.1 An outline of a trapezoid (see Fig. 1) is marked on a
direction.
specimen cut for the determination of breaking load, and the
nonparallel sides of the specimen are clamped in the jaws of a
6. Sampling
tensile testing machine. A continuously increasing load is
6.1 Unless otherwise specified, sample as directed, parallel
applied to the specimen in such a way that the tear propagates
and perpendicular to backbone or parallel and perpendicular to
across the specimen width. The value of the breaking load of
the cut part.
7. Test Specimens
This test method is under the jurisdiction ofASTM Committee D31 on Leather
and is the direct responsibility of Subcommittee D31.05 on Upholstery.
7.1 Unless otherwise specified, test ten specimens.
Current edition approved Sept. 1, 2005. Published September 2005. Originally
7.2 Cut the test specimens in the machine direction and in
approved in 1997. Last previous edition approved in 2000 as D6077 - 00. DOI:
the cross-machine direction.
10.1520/D6077-00R05.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8. Conditioning
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
8.1 Condition the test specim
...