ASTM D2213-2000(2005) Standard Test Method for Compressibility of Leather《皮革压缩性的标准试验方法》.pdf

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1、Designation: D 2213 00 (Reapproved 2005)Standard Test Method forCompressibility of Leather1This standard is issued under the fixed designation D 2213; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A num

2、ber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 com-pre

3、ssibility of sole leather. This test method does not apply towet blue.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are providedfor information only.2. Referenced Documents2.1 ASTM Standards:2D 1610 Practice for Conditioning Leather and

4、LeatherProducts for TestingD 1813 Test Method for Measuring Thickness of LeatherTest Specimens3. Terminology3.1 Definition:3.1.1 compressibilitythe percentage change in thicknessof a specimen on being subjected to a specified pressure for aperiod of time.4. Summary of Test Method4.1 A load of 12 000

5、 lbf (53 kN) or 3000 psi (21 MPa) isapplied to a leather specimen 2 by 2-in.2(51 by 51-mm2). Thepercentage change in initial thickness, determined by measur-ing thicknesses before and after compression, represents thecompressibility of the sample.5. Significance and Use5.1 Compressibility is conside

6、red an important factor thatinfluences wear resistance of sole leather.3,46. Apparatus6.1 Press,5either hand- or power-driven, having a capacityof at least 15 000 lbf (67 kN) permitting a pressure of 3000 6100 psi (21 6 1 MPa). The rate of increase shall not exceed200 psi/s (1.4 MPa/s). The press sh

7、all contain two flat steelplates and an indicator for reading the applied force. A suitabletesting machine may also be used.6.2 Stop Watch, or other suitable timing device.7. Test Specimen7.1 The specimen shall be a square of leather 2 by 2 6132in. (51 by 51 6 0.8 mm) cut by a die.8. Procedure8.1 Co

8、ndition the specimens in accordance with PracticeD 1610.8.2 Measure the initial thickness of the specimen at themiddle of each side approximately 0.5 in. (12.7 mm) from theedge in accordance with Method D 1813 averaged and re-corded as T1.8.3 Place the specimen between the flat steel plates andapply

9、 pressure at a rate not greater than 200 psi/s (1.4 MPa/ s)until the required 3000 6 100 psi (21 6 1 MPa) is reached.NOTE 1The operator shall take care to apply the force uniformly andperpendicular to the leather surfaces.8.4 Maintain the load for 3 min, continuously correcting forrelaxation or loss

10、 in force, and then release.8.5 Remove the specimen from the apparatus and immedi-ately remeasure in accordance with 8.2. Record the finalthickness as T2.9. Calculation9.1 Calculate the percentage compressibility as follows:Compressibility, % 5 T12 T2!/T1# 3 100 (1)1This test method is under the jur

11、isdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. Thistest method was developed in cooperation with the American Leather ChemistsAssn. (Standard Method E 45 1953).Current edition approved Sept. 1, 2005. Published September 2005. O

12、riginallyapproved in 1963 as D 2213 63 T. Last previous edition approved in 2000 asD 2213 00.2For 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

13、Summary page onthe ASTM website.3Hobbs, R. B., and Kronstadt, R. A., Journal, Am. Leather Chemists Assn., Vol40, 1945, p. 12.4Booth, W. E., Journal, Society of Leather Trades Chemists, Vol 43, 1959, p.349.5The sole source of supply of the hand press known to the committee at this timeis Fred S. Carv

14、er Co., Summit, NJ. If you are aware of alternative suppliers, pleaseprovide this information to ASTM Headquarters. Your comments will receivecareful consideration at a meeting of the responsible technical committee,1whichyou may attend.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C7

15、00, West Conshohocken, PA 19428-2959, United States.where:T1= initial thickness of the uncompressed sample, andT2= thickness of the sample after compression.10. Report10.1 The report shall include the following:10.1.1 Compressibility of each specimen from each testunit, and10.1.2 Compressibility bas

16、ed on the average of all speci-mens tested, recorded to the nearest 0.1 %.11. Precision11.1 The mean difference between two laboratories usingseven pairs of matched samples is 1.40 and confidence limits at95 % are 0.23 to 2.67.12. Keywords12.1 compressibility; sole leather; wear resistanceAPPENDIX(N

17、onmandatory Information)X1. COMPRESSIBILITY OF FINISHED SOLE LEATHERSASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of an

18、y 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 every five years andif not revised, either reapproved or withdrawn. Your comments are i

19、nvited 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 technical committee, which you may attend. If you feel that your comments have not receiv

20、ed 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 Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of

21、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).TABLE X1.1 Interlaboratory Data National Bureau of Standardsand U.S. Naval Supply Research and Development Facil

22、ityNBSUSNSR&DFDifference (x x)(x x)211.0 10.4 0.6 0.8 0.6412.4 9.0 3.4 2.0 4.0010.1 10.1 0 1.4 1.966.5 3.6 2.9 1.5 2.258.7 8.5 0.2 1.2 1.448.1 6.3 1.8 0.4 0.167.3 6.4 0.9 0.5 0.25_ _9.8 10.70Mean difference = 1.40Standard deviation = 1.24Standard error = 0.52Confidence limits at 95 % for this mean difference = 1.4 6 2.45 (0.52) = 0.23to 2.67D 2213 00 (2005)2