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ASTM

ASTM D5052-00

(Test Method)

Standard Test Method for Permeability of Leather to Water Vapor

Standard Test Method for Permeability of Leather to Water Vapor

SCOPE
1.1 This test method covers the determination of the permeability of leather to water vapor by measuring the rate at which water vapor passes through a test specimen. This test method does not apply to wet blue.
1.2 The values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system may not be exact equivalents, therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the 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
09-Sep-2000
ICS
59.140.30 - Leather and furs
Technical Committee
D31 - Leather
Drafting Committee
D31.07 - Physical Properties
Current Stage
Ref Project

Relations

Replaced By
ASTM D5052-00(2005) - Standard Test Method for Permeability of Leather to Water Vapor
Effective Date
01-Apr-2005

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ASTM D5052-00 - Standard Test Method for Permeability of Leather to Water VaporASTM D5052-00 - Standard Test Method for Permeability of Leather to Water Vapor
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ASTM D5052-00 - Standard Test Method for Permeability of Leather to Water Vapor
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D5052–00
Standard Test Method for
Permeability of Leather to Water Vapor
This standard is issued under the fixed designation D 5052; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of the perme-
ability of leather to water vapor by measuring the rate at which
water vapor passes through a test specimen. This test method
does not apply to wet blue.
1.2 The values stated in either inch-pound or SI units are to
be regarded separately as standard. The values stated in each
system may not be exact equivalents, therefore, each system
shall be used independently of the other. Combining values
from the two systems may result in nonconformance with the
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 appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
FIG. 1 Permeability Apparatus
2. Referenced Documents
2.1 ASTM Standards:
sions shown in Fig. 2 and a template, ⁄8 in. thick and 2.225 6
D 1610 Practice for Conditioning Leather and Leather
2 2
0.025 in. in diameter [area is 0.0025 m,or25cm ], made of
Products for Testing
brass or other non-corrosive metal.
3. Summary of Test Method
5.3 Steel Stamping Die, 2.75 6 0.1 in. in diameter.
5.4 Constant Temperature and Humidity Chamber, which
3.1 In this test method the water vapor permeability is
may be either a laboratory, a cabinet, or a chamber with
measured after the test specimen is exposed to moist air on one
circulated air maintained at standard condition (23 6 1°C and
side and dry air on the other side.
50 6 4 % relative humidity).
4. Significance and Use
5.5 Fan, capable of maintaining an air-flow over the surface
of the Permeability Apparatus at a velocity of at least 500
4.1 This test method is intended for use on all types of
ft/min [254 m/s].
leathers.
4.2 Water vapor permeability is one of several factors
6. Reagents and Materials
contributing to the relative comfort of footwear, handwear, and
6.1 Dessicant, consisting of fresh 8 mesh anhydrous cal-
garments.
cium chloride.
5. Apparatus
6.2 Microcrystalline Wax, with a melting point of 70°C or
lower.
5.1 Analytical Balance, accurate to 0.001 g.
5.2 Permeability Apparatus, as shown in Fig. 1. It shall
7. Procedure
consist of an aluminum cup having approximately the dimen-
7.1 All specimens shall be conditioned as prescribed in
Practice D 1610. Conditioning other than as prescribed shall be
noted in the results.
This test method is under the jurisdiction ofASTM Committee D31 on Leather
and is the direct responsibility of Subcommittee D31.07 on Physical Properties—
7.2 Fill the aluminum cup with the desiccant to a height
General.
1 1
between ⁄8 and ⁄4 in. [3.2 to 6.4 mm] below the level of the
Current edition approved Sept. 10, 2000. Published November 2000. Originally
rim, as shown in Fig. 1. Leave enough space so that shaking of
published as D 5052–90. Last previous edition D 5052–96.
Annual Book of ASTM Standards, Vol 15.04. the dish, which must be done after each weighing, will mix the
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D5052–00
FIG. 2 Spining Stud for Water Vapor Permeability Dish
desiccant. Place the specimen, with the grain side downward, 8. Calculation
over the desiccant and center with the cup. Place the template
8.1 Calculate the permeability to water vapor of the test
flat on the specimen and center as nearly as possible with the
specimen by one of the following equations:
cup. A
...

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1.1 This practice is based on studies relating the rate of deterioration of leathers having known durabilities from long-term storage of samples, to the deterioration experienced by laboratory exposure of specimens to known contents of acid gases in air or oxygen. This is accomplished by measuring the deterioration (reduction in tensile strength) of leather specimens when they are subjected to exposure to a mixture of air, moisture and sulfur dioxide at a given temperature and pressure and for a given exposure time. The loss of tensile strength of the specimens resulting from this exposure is compared to that experienced by a variety of leathers having various tannages and having historically long and short service lifetimes. The initial tensile strength and the degree of loss of tensile strength is related to what service life can be anticipated from a given leather.  
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