ASTM D2098-04(2012)
(Test Method)Standard Test Method for Dynamic Water Resistance of Shoe Upper Leather by the Dow Corning Leather Tester
Standard Test Method for Dynamic Water Resistance of Shoe Upper Leather by the Dow Corning Leather Tester
SIGNIFICANCE AND USE
3.1 This test method is intended to estimate the water resistance of shoe upper leather. The flex imparted to the leather is a magnification of the flex given the vamp of the shoe in actual wear.Note 1—There is an indication that this test method cannot be used interchangeably for specification purposes with Test Method D2099.
SCOPE
1.1 This test method covers the determination of the dynamic water resistance of shoe upper leather by means of the Dow Corning Tester. It has been revised to show the state of the art in the equipment used in testing. It is applicable to all types of shoe upper leather. This test method does not apply to wet blue.
1.2 Initial water penetration and water absorption can be measured.
1.3 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.
1.4 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.
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Standards Content (Sample)
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Designation: D2098 − 04(Reapproved 2012)
Standard Test Method for
Dynamic Water Resistance of Shoe Upper Leather by the
Dow Corning Leather Tester
This standard is issued under the fixed designation D2098; 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.
interchangeably for specification purposes with Test Method D2099.
1. Scope
1.1 This test method covers the determination of the dy-
4. Apparatus
namic water resistance of shoe upper leather by means of the
4.1 Balance, sensitive to 0.01 g.
DowCorningTester.Ithasbeenrevisedtoshowthestateofthe
4.2 Dow Corning Leather Tester, as shown in Fig. 1,orits
art in the equipment used in testing. It is applicable to all types
equivalent. The essential features of the machine are as
of shoe upper leather. This test method does not apply to wet
follows:
blue.
4.2.1 Aspecimen holder made of two vertical clamps. Each
1.2 Initial water penetration and water absorption can be
clamp shall have two stainless steel arms (7.5 by 0.5 by 0.5 in.
measured.
(190.5 by 12.7 by 12.7 mm)), one arm fixed, the other
1.3 The values stated in inch-pound units are to be regarded
moveable. One clamp shall be mounted on a horizontal
as standard. The values given in parentheses are mathematical
reciprocating shaft, that is, attached by a connecting link to a
conversions to SI units that are provided for information only
motor driven eccentric, which turns at 60 r/min. The bottom of
and are not considered standard.
the clamps shall be in the same horizontal plane. In one
1.4 This standard does not purport to address all of the rotation of the eccentric, the minimum distance between
clamps shall be 1.50 6 0.01 in. (38.16 0.25 mm) (inside
safety concerns, if any, associated with its use. It is the
measurement)andthemaximumdistancebetweenclamps2.50
responsibility of the user of this standard to establish appro-
6 0.01 in. (63.5 6 0.25 mm) (inside measurement).
priate safety and health practices and determine the applica-
4.2.2 Water Tank made of stainless steel or other noncorro-
bility of regulatory limitations prior to use.
sive material. It shall be of such a size that it can be placed
2. Referenced Documents
around the clamps, and of such a depth that when in position
for use, the top of the pan is at least 2.5 in. (63.5 mm) above
2.1 ASTM Standards:
the bottom of the clamps, and the bottom of the pan is at least
D2099 Test Method for Dynamic Water Resistance of Shoe
0.5 in. (12.7 mm) below the bottom of the clamps.
Upper Leather by the Maeser Water Penetration Tester
4.2.3 Two systems shall be used to record the number of
3. Significance and Use
cycles through which the specimen is flexed. One shall be a
mechanical reset counter connected to the movable clamp.The
3.1 This test method is intended to estimate the water
other system shall be electrical (see Fig. 2). The resistance
resistance of shoe upper leather. The flex imparted to the
across the electrodes shall be 7500 6 500 ohms. The sensing
leatherisamagnificationoftheflexgiventhevampoftheshoe
electrode shown is inside a leather specimen filled with
in actual wear.
stainless-steel balls. The common electrode is in a salt solution
NOTE 1—There is an indication that this test method cannot be used
which is in continuous contact with the specimen during
flexing. Switch S when manually closed starts an electrical
impulse counter actuated by a micro switch, EC, which makes
This test method is under the jurisdiction ofASTM Committee D31 on Leather
contact once on each flex. This records the total number of
and is the direct responsibility of Subcommittee D31.03 on Footwear. This test
method was developed in cooperation with the American Leather Chemists Assn.
Current edition approved Sept. 1, 2012. Published September 2012. Originally
approved in 1962 as D2098–62T. Last previous edition approved in 2008 as The sole source of supply of the apparatus known to the committee at this time
D2098–04(2008). DOI: 10.1520/D2098-04R12. is Koehler Instrument Co., 1595 Sycamore Ave., Bohemia, NY 11716. Telephone:
For referenced ASTM standards, visit the ASTM website, www.astm.org, or (800) 878-9070. Fax: (516) 589-3815. If you are aware of alternative suppliers,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM pleaseprovidethisinformationtoASTMHeadquarters.Yourcommentswillreceive
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D2098 − 04(Reapproved 2012)
flexes until initial water penetration. Initial water penetration is
D2098 − 04 (2012)
FIG. 1 Dow Corning Leather Tester
FIG. 2 Electrical Diagram for Dow Corning Leather Tester
detected by a current leakage from the high electrode through the counter. (Warning—It is essential that the electrical circuit
the specimen to the common electrode in the conducting be converted to 110 volts, not to exceed 28 volts across the
solution. This causes the induction relay to operate, stopping
D2098 − 04 (2012)
electrode. Specimen should be put in position or removed only 8.1.5 Grasp the back clamp firmly in the left hand (contain-
when the electrode circuit is not energized.) ing the gasketed end of the specimen) and tighten down the
clamp with the wing nut. The specimen must be very securely
5. Reagents and Materials clamped.
8.1.6 Position the second gasket, folded as before, in the
5.1 Magnetic Balls, stainless steel, diameter ⁄8 in. (3 mm
specimen, so that it lies between the jaws of the front clamp.
optional) 400 series. The steel balls must be clean and free of
Grasp the clamp with the left hand and tighten the wing nut
grease,oil,sil
...
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