ASTM D 6182-2000 皮革的柔韧性及皮革上涂饰粘着力的标准试验方法

Designation: D 6182 – 00 Standard Test Method for Flexibility and Adhesion of Finish on Leather1 This standard is issued under the fixed designation D 6182; 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 is intended for use on finished leather to evaluate resistance to cracking, delamination, and discolora- tion of the finish when subjected to repeated flexing. This test method does not apply to wet blue. 1.2 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. 2. Referenced Documents 2.1 ASTM Standards: D 1517 Terminology Relating to Leather2 D 1610 Practice for Conditioning Leather and Leather Products for Testing2 D 2813 Practice for Sampling Leather for Physical and Chemical Tests2 2.2 DIN Standard: DIN 53351 Dauerfaltverhalten3 3. Terminology 3.1 Definitions—Terms used in this test method are defined in accordance with Terminology D 1517. 4. Summary of Test Method 4.1 Leather is conditioned according to one of two pre- scribed procedures, flexed in a Bally Flexometer,4 and an endpoint is determined by rating the degree of damage after a fixed number of flexes. 5. Significance and Use 5.1 This test method is intended for use on any type of finished leather. 5.2 This test method will give an indication of the flexibility, adhesion, and strength of the finish on leather. 6. Apparatus 6.1 Bally Flexometer, conforming to DIN 53351, and oper- ating at a rate of 100 cycles/min. 6.2 Die for cutting leather specimens to 45 3 70 mm. 7. Reagents and Materials 7.1 Distilled or Deionized Water. 8. Sampling, Test Specimens, and Test Units 8.1 Sample leather according to Practice D 2813. 8.2 Cut two test pieces 45 3 70 mm from each sample using a die. One piece cut parallel and the other perpendicular to the backbone. 9. Conditioning 9.1 Dry Leather Test—Prepare the test pieces according to Practice D 1610. 9.2 Wet Leather Test—Submerge the test pieces in distilled or deionized water for 20 6 1 min. Blot excess water off using blotting paper or a paper towel. 9.3 Other Test—Conditioning, other than as prescribed, shall be documented in the results. 10. Procedure 10.1 Bring the upper clamp of the Bally Flexometer to its uppermost position. 10.2 Fold the test piece in half along its major axis with the finished side toward the middle. 10.3 Insert the folded test piece in the top clamp, and tighten the clamp. 10.4 Fold the test piece around the top clamp and down. 10.5 Lightly pinch the leather at the top clamp to remove slack and to position the downward fold vertically in the bottom clamp. Tighten the bottom clamp. A properly mounted test piece will not have any tension between the top and bottom clamps. 1 This test method is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.07 on Physical Properties— General. Current edition approved Sept. 10, 2000. Published October 2000. Originally published as D 6182 – 97. Last previous edition D 6182 – 97. 2 Annual Book of ASTM Standards, Vol 15.04. 3 DIN 53351 Dauerfaltverhalten is published by DIN Deutsches Institut für Notmung and is available from ANSI, 11 W. 42nd St., 13th Floor, New York, NY 10036, and from Global Engineering Documents, 15 Inverness Way East, Engle- wood, CO 80112. 4 Equipment conforming to DIN 53351 is available from Bally Trading Ltd. Prüfgeräteverkauf, CH-5012 Schönenwerd, Switzerland. Other manufacturers are Giuliani S.N.C., Via Cervino, 10 Torino, Italy, and Pellizzato Bruno, 31033 Salvarosa di Castelfranco Venito (Treviso), Borgo Mandolato 13, Italy. 1 Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States. 10.6 Set the counter to zero and the cutoff to the desired number of cycles. 10.7 Examine the test piece using a magnifying glass with 6 6 13 magnification. 11. Interpretation of Results 11.1 Endpoint Determined after Fixed Number of Flexes— Rank the damage according to Table 1. 12. Report 12.1 For an endpoint determined by 11.1, report the condi- tions used in Section 9, the number of cycles, and the rank in Table 1 of each test piece in the sample. 13. Precision and Bias 13.1 No information is presented about either the precision or bias of this test method for measuring flexibility and adhesion of finish on leather, since the test result is nonquan- titative. 14. Keywords 14.1 Bally flexometer; finish adhesion; finish flexibility; finish strength; leather The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of 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 and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. This standard is copyrighted by ASTM, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org). TABLE 1 Rank of Damage Rank Description of Damage 1 No damage 2 Discoloration or thin cracks in top finish coat only 3 Cracks into base coats 4 Cracks large enough to see leather substrate below 5 Finish cracks and peels back or flakes off D 6182 2