ASTM D2346-2000(2012) Standard Test Method for Apparent Density of Leather《皮革表观密度的标准试验方法》.pdf

1、Designation: D2346 00 (Reapproved 2012)Standard Test Method forApparent Density of Leather1This standard is issued under the fixed designation D2346; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numb

2、er in parentheses indicates the year of last reapproval. Asuperscript 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. Scope1.1 This test method covers the determination of the appar-ent

3、 density of specimens of leather. This test method does notapply to wet blue.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This

4、 standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility 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.2. Referenced Documents

5、2.1 ASTM Standards:2D1813 Test Method for Measuring Thickness of LeatherTest SpecimensD2347 Test Method for Measuring Area of Leather TestSpecimens3. Terminology3.1 Definitions:3.1.1 apparent densitythe weight of a unit volume of bulkleather conditioned for 48 h in an atmosphere maintained at73.4 6

6、1.8F (23 6 1C) and 50 6 4 % relative humidity.4. Significance and Use4.1 This test method is designed to determine the apparentdensity of specimens from their area and thickness. Bymeasuring apparent density, the degree of loading or ofcompression of leather can be evaluated. The test method isunsui

7、table for very soft leathers such as chamois whosethickness cannot be accurately measured by the test methodcited.5. Apparatus5.1 Round Die, 2.7 to 3.0 in. (68.6 to 76.2 mm) in diameter.5.2 Mallet or Clicking Machine.5.3 Rule or Steel Tape, graduated in132 in. or 0.02 in. or inmillimetres.5.4 Balanc

8、e and set of weights.5.5 Thickness Gage as described in Test Method D1813.6. Test Specimen6.1 The test specimen shall be a disk of leather that has beenconditioned as specified in 3.1.1. This specimen may be thesame as that used in Test Method D2347.7. Procedure7.1 Weigh the specimen to the nearest

9、0.001 g.7.2 Measure the thickness to the nearest 0.025-cm in fourquadrants of the specimen disk, equidistant from the rim andcenter (10 mil = 0.025 cm).7.3 Measure the area to the nearest second decimal place inaccordance with Test Method D2347.8. Calculation and Report8.1 Calculate the apparent den

10、sity to the second decimalplace by dividing the weight of the specimen in grams by theproduct of area in square centimetres and the average thicknessin centimetres.9. Precision and Bias9.1 Results by the same operator on duplicate, adjacentspecimens from the same skin should not be considered suspec

11、tunless the coefficient of variation exceeds 4 %.9.2 Results of two laboratories on duplicate specimens,same skin, should not be considered suspect unless the coef-ficient of variation exceeds 10 %.1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsi

12、bility of Subcommittee D31.03 on FootwearThis testmethod was developed in cooperation with the American Leather Chemists Assn.(Standard Method E62 1972).Current edition approved Sept. 1, 2012. Published September 2012. Originallyapproved in 1965 as D2346 65 T. Last previous edition approved in 2008

13、asD2346 00(2008). DOI: 10.1520/D2346-00R12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM Int

14、ernational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States110. Keywords10.1 apparent density; area; leather; thicknessASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.

15、 Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed e

16、very five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible tec

17、hnical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoho

18、cken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D2346 00 (2012)2