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ASTM D4705-00(2010)

(Test Method)

Standard Test Method for Stitch Tear Strength of Leather, Double Hole

Standard Test Method for Stitch Tear Strength of Leather, Double Hole

SIGNIFICANCE AND USE
This test method is designed to measure the load required to tear leather through two holes in the test specimen. Tanners and leather buyers have found that this test gives an indication of the resistance 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 tear 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 is intended for use in determining the stitch tearing resistance of leather using a double hole tear. It is particularly applicable to lightweight leathers. 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-Sep-2010
ICS
59.140.30 - Leather and furs
Technical Committee
D31 - Leather
Drafting Committee
D31.07 - Physical Properties
Current Stage
Ref Project

Relations

Replaces
ASTM D4705-00(2005) - Standard Test Method for Stitch Tear Strength of Leather, Double Hole
Effective Date
01-Oct-2010
Replaced By
ASTM D4705-12 - Standard Test Method for Stitch Tear Strength of Leather, Double Hole
Effective Date
01-Sep-2012

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ASTM D4705-00(2010) - Standard Test Method for Stitch Tear Strength of Leather, Double HoleASTM D4705-00(2010) - Standard Test Method for Stitch Tear Strength of Leather, Double Hole
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ASTM D4705-00(2010) - Standard Test Method for Stitch Tear Strength of Leather, Double Hole
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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: D4705 − 00(Reapproved 2010)
Standard Test Method for
Stitch Tear Strength of Leather, Double Hole
This standard is issued under the fixed designation D4705; 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 Department of Defense.
1. Scope the specimen and direction of tear relative to the backbone will
affect the uniformity of the test results. This test method may
1.1 This test method is intended for use in determining the
not apply when the conditions of the test employed differ
stitch tearing resistance of leather using a double hole tear. It is
widely from those specified in the test method.
particularly applicable to lightweight leathers.This test method
does not apply to wet blue.
4. Apparatus
1.2 The values stated in inch-pound units are to be regarded
4.1 Testing Machine, as described in Test Method D2209.
as standard. The values given in parentheses are mathematical
4.2 ThicknessGage, a dead weight type of thickness gage as
conversions to SI units that are provided for information only
described in Method D1813.
and are not considered standard.
4.3 Steel Die, to cut test specimens (as described in 5.1).
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.4 Paper Clip, #1/Premium, with wire diameter 0.041 6
responsibility of the user of this standard to establish appro-
0.001 in. (1.04 6 0.0254 mm).
priate safety and health practices and determine the applica-
5. Sampling Test Specimen
bility of regulatory limitations prior to use.
5.1 Unless otherwise specified, sample the leather according
2. Referenced Documents
to Practice D2813.
2.1 ASTM Standards:
5.2 The specimen shall be a rectangle of leather 2 in. (50.8
D1610 Practice for Conditioning Leather and Leather Prod-
mm) in length and 1 in. (25.4 mm) in width with two holes ( ⁄64
ucts for Testing
in. (1.98 mm)) in diameter on one end of the specimen. The
D1813 Test Method for Measuring Thickness of Leather
1 1
centers of the holes shall be ⁄4 in. (6.35 mm) from the end, ⁄4
Test Specimens
in. (6.35 mm) apart, and located equidistant from the center
D2209 Test Method for Tensile Strength of Leather
line (length wise) of the specimen. See Fig. 1.
D2813 Practice for Sampling Leather for Physical and
5.3 The specimen shall be cut with the long dimension
Chemical Tests
perpendicular to the backbone.
3. Significance and Use
6. Conditioning
3.1 This test method is designed to measure the load
6.1 All specimen shall be conditioned for 48 h in an
required to tear leather through two holes in the test specimen.
atmosphere maintained at 73.4 6 3.6°F (23 6 2°C) and 50 6
Tanners and leather buyers have found that this test gives an
4 % relative humidity and tested under the conditions as
indication of the resistance of leather to tearing. It is of
described in Practice D1610.
particular value in estimating the durability of leather to
withstand tearing stresses encountered in the manufacture of
7. Procedure
shoes, garments, and upholstered products. The thickness of
7.1 Determine the thickness of the specimen to the nearest
0.5 oz (0.2 mm) on the long axis near one end.
This test method is under the jurisdiction o
...

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