ASTM D6077-16(2023)

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: D6077 − 16 (Reapproved 2023)
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
This test method does not apply to wet blue.
4.1 The trapezoid tearing load is a tension test in which the
1.2 The values stated in SI units are to be regarded as the
test strength is determined primarily by the interlocking
standard. The values given in parentheses are for information
structure of the fibers. It is useful for estimating relative ease of
only.
tearing of leather.
1.3 This standard does not purport to address all of the
4.2 The procedure can also be used to determine if there is
safety concerns, if any, associated with its use. It is the
any appreciable difference in the relative strength of the leather
responsibility of the user of this standard to establish appro-
intheparallelandtheperpendiculardirectionstothebackbone.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5. Apparatus
1.4 This international standard was developed in accor-
5.1 Tensile Testing Machine, constant-rate-of-traverse type,
dance with internationally recognized principles on standard-
equipped with an autographic recorder to register the applied
ization established in the Decision on Principles for the
load.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.2 Clamps, with faces measuring 25 mm by 75 mm (1 in.
Barriers to Trade (TBT) Committee.
by 3 in.) with the longer dimension perpendicular to the
direction of application of the load.
2. Referenced Documents
5.3 Template, optional, having the dimensions shown in Fig.
2.1 ASTM Standards:
1.
D1610 Practice for Conditioning Leather and Leather Prod-
5.4 Pawls, bolt on a machine to allow motion in only one
ucts for Testing
direction.
D2813 Practice for Sampling Leather for Physical and
Chemical Tests
6. Sampling
6.1 Unless otherwise specified, sample as directed, parallel
3. Summary of Test Method
and perpendicular to backbone or parallel and perpendicular to
3.1 An outline of a trapezoid (see Fig. 1) is marked on a
the cut part. Sampling per Practice D2813.
specimen cut for the determination of breaking load, and the
nonparallel sides of the specimen are clamped in the jaws of a
7. Test Specimens
tensile testing machine. A continuously increasing load is
7.1 Unless otherwise specified, test ten specimens.
applied to the specimen in such a way that the tear propagates
across the specimen width. The value of the breaking load of
7.2 Cut the test specimens parallel and perpendicular to
backbone or parallel and perpendicular to the cut part.
8. Conditioning
This test method is under the jurisdiction ofASTM Committee D31 on Leather
and is the direct responsibility of Subcommittee D31.05 on Upholstery.
8.1 Condition in accordance with Practice D1610. (The
Current edition approved Jan. 1, 2023. Published January 2023. Originally
customer may specify.)
approved in 1997. Last
...