1、Designation:D191200(Reapproved 2016)Standard Test Method forCold-Crack Resistance of Upholstery Leather1This standard is issued under the fixed designation D1912;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisi
2、on.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method2covers the measurement of the cold-crack resistance on all types of upholstery leathers,butespecially in the field of
3、 automotive upholstery.3This testmethod does not apply to wet 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.1.3 This standard does not purport to address all of thesafety concerns,if any,associated wi
4、th 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 Documents2.1 ASTM Adjuncts:Greuel rotary cold-fold test machine(14 drawings,1 list)43.Summary of
5、Test Method3.1 In this test method,the cold-crack resistance of uphol-stery leather is measured by means of a mechanically-appliedpressure to a cone-shaped specimen of leather after both thespecimen and the pressure-device have been conditioned in acarefully controlled cold cabinet.Both the specimen
6、 and themachine remain in the cold cabinet during testing.4.Significance and Use4.1 The results are reproducible5and correlate with the coldimpact test6and also correlate with actual practice conditions.7Acomparison of the significance of this test method with othertest methods has also been made.55
7、.Apparatus5.1 Greuel Rotary Cold-Fold Test Machine,4,8as shown inFig.1 and consisting of two tangential knurled rollers drivenby a chain drive.5.2 Steel Die or Other Shearing Device.5.3 Cold Cabinet,capable of maintaining temperaturesfrom 50 to+20F(45 to 6C)within 61F(0.5C)andflexible enough so that
8、 temperatures can be adjusted easily andquickly in 5 increments.5.4 Specimen Racks,constructed so that the specimens maybe suspended in the air by attachment at point C with a paperclip(see Fig.2).5.5 Pliers-Type Stapler.5.6 Temperature Indicator,with a range from 50 to+20F(45 to 6C)and an accuracy
9、of 61F(0.5C)for measuringthe temperature of the area adjacent to the specimens in thecabinet.6.Test Specimen6.1 The specimen shall be cut with a die or other shearingdevice to a size shown in Fig.2(a).The specimen may be cutfrom any area on the hide.6.2 After cutting,the specimen shall be folded and
10、 stapledso as to make a cone shape with the finished side out,such as1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.05 on Upholstery.Thisstandard was developed in cooperation with the American Leather Chemists Assn.Cur
11、rent edition approved Sept.1,2016.Published September 2016.Originallyapproved in 1961.Last previous edition approved in 2010 as D191200(2010).DOI:10.1520/D1912-00R16.2Sometimes referred to as the Greuel Cold-Fold Test in Upholstery Groupliterature.3In the past,cold-crack resistance has been measured
12、 by various methods whichwere evaluated by the Upholstery Group Technical Committee in April 1957,andthe Cold-Fold Test was adopted as a standard test in the industry.The method hasbeen adopted by the following groups:The Upholstery Leather Group,Tanners Council of America.Fisher Body Division of Ge
13、neral Motors Corp.,Specification No.29.1,datedApril 12,1957.4Detailed drawings of this machine are available at a nominal cost from:ASTMInternational Headquarters.Order Adjunct No.ADJD1912.Original adjunct pro-duced in 1957.5Good reproducibility is evidenced by correlation tests conducted by theUpho
14、lstery Leather Group Technical Committee in April 1956 and reported byFopma,R.J.,“Study of Cold-Crack Test for Upholstery Leathers,”The Journal ofthe American Leather Chemists Association,Vol LIV,No.4,April 1959,p.194.6ALCA Test Method E42,Provisional,April 1953.7Upholstery Group Technical Committee
15、,Tanners Council of America files,“Correlation of Cold-Fold versus Cold Impact Tests versusActual Cushion Testing.”8The sole source of supply of the test machine known to the committee at thistime is Aim Tool and Die,14324 172nd St.,Grand Haven,MI 49417.If you areaware of alternative suppliers,pleas
16、e provide this information to ASTM Headquar-ters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 is shown in Fig.2(b).This is done by stapling as close to theapex of the cone as possible,point D,and then stapling pointsA and B together.Staples should not go through the backsection,C.Alternatively,the fastening may
