ASTM D2212-00(2015)

Standard Test Method for Slit Tear Resistance of Leather

SIGNIFICANCE AND USE
4.1 This test method is designed to measure the load required to tear leather at a slit cut perpendicular to its surface. Tanners and leather buyers have found that it gives an indication of the resistance of the cross-sectional thickness of leather to tearing. It is of particular value in estimating the durability of leather to withstand tearing stresses encountered in the manufacture of shoes, garments, and upholstered products. The thickness of the specimen and direction of slit relative to the backbone will affect the uniformity of the test results. This test method may not apply when the conditions of the test employed differ widely from those specified in the test method.
SCOPE
1.1 This test method covers the determination of the slit tear resistance of light leathers such as shoe uppers, gloves, and upholstery. This test method does not apply to wet blue.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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

• Status: Historical
• Publication Date: 30-Apr-2015
• ICS: 59.140.30 - Leather and furs
• Technical Committee: D31 - Leather
• Drafting Committee: D31.07 - Physical Properties

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D2212 − 00 (Reapproved 2015)
Standard Test Method for
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Slit Tear Resistance of Leather
This standard is issued under the fixed designation D2212; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Tanners and leather buyers have found that it gives an
indication of the resistance of the cross-sectional thickness of
1.1 This test method covers the determination of the slit tear
leather to tearing. It is of particular value in estimating the
resistance of light leathers such as shoe uppers, gloves, and
durability of leather to withstand tearing stresses encountered
upholstery. This test method does not apply to wet blue.
in the manufacture of shoes, garments, and upholstered prod-
1.2 The values stated in inch-pound units are to be regarded
ucts.Thethicknessofthespecimenanddirectionofslitrelative
as standard. The values given in parentheses are mathematical
to the backbone will affect the uniformity of the test results.
conversions to SI units that are provided for information only
This test method may not apply when the conditions of the test
and are not considered standard.
employed differ widely from those specified in the test method.
1.3 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
5.1 Testing Machine, as described in Test Method D2209.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.2 Thickness Gage—A dead-weight type of thickness gage
bility of regulatory limitations prior to use.
as described in Test Method D1813.
5.3 Specimen Holders—Two specimen holders, which are
2. Referenced Documents
fastened into the jaws of the testing machine and which support
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2.1 ASTM Standards:
the specimen during testing (see Fig. 1). The specimen holders
D1610 Practice for Conditioning Leather and Leather Prod-
shall be adjusted in the machine so that they are touching each
ucts for Testing
other.
D1813 Test Method for Measuring Thickness of Leather
5.4 Die—Adie 1 in. (25.4 mm) wide by 2 in. (51 mm) long
Test Specimens
that cuts a specimen while simultaneously cutting a slot in the
D2209 Test Method for Tensile Strength of Leather
specimen (see Fig. 2).
3. Terminology
6. Test Specimens
3.1 Definitions:
6.1 The specimen shall be 1 by 2 in. (25.4 by 51 mm), cut
3.1.1 slit tear resistance—the load required to tear the
with the long dimension either parallel or perpendicular to the
cross-sectional thickness of the leather at a slit cut through the
backbone (see Figs. 1 and 2).
leather by a die or a sharp knife.
6.2 The specimen cut with the slit tear die shall have a slot
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4. Significance and Use
⁄16 in. (0.4375 in. (11 mm)) long by ⁄16 in. (0.1875 in. (4.8
3
mm)) wide tapered with a ⁄16-in. radius to a slit at each end of
4.1 This test method is designed to measure the load
specimen as shown in Fig. 2.
required to tear leather at a slit cut perpendicular to its surface.
7. Conditioning
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This test method is under the jurisdiction ofASTM Committee D31 on Leather 7.1 All specimens shall be conditioned as prescribed in
and is the direct responsibility of Subcommittee D31.07 on Physical Properties This
Practice D1610. Conditioning other than as prescribed shall be
test method was developed in cooperation with the American Leather Chemists
noted in the results.
Assn. (Standard Method E59 – 1965).
Current edition approved May 1, 2015. Published July 2015. Originally approved
8. Procedure
in 1963. Last previous edition approved in 2010 as D2212 – 00 (2010). DOI:
10.1520/D2212-00R15.
8.1 Determine the thickness of the specimen to the nearest
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
0.001 in. (0.025 mm) on the long axis at each end of the cut.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
The gage foot shall be adjacent to, but shall not overlap, the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cut.
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D2212 − 00 (2015)
Metric Equivalents
3 1 5 3
in. ⁄16 ⁄2 ⁄8 ⁄4 1 2
mm 4.8 12.7 16 19 25.4 51
FIG. 2 Shape and Dimensions of Die for Cutting Slit Tear Test
Specimens
Metric Equivalents
in. mm in. mm in. mm
10.1.1 One Operator, Duplicate Specimens, Same Skin—
1 1
Results by the same
...