ISO INTERNATIONAL STANDARD 17227 IULTCS/IUP 35 First edition 2002-12-15 Leather Physical and mechanical tests Determination of dry heat resistance of leather Cuir-Essaisphysiquesetmecaniques-Determinationde laresistance du cuir a la chaleur seche Reference number ISO 17227:2002(E) ISO IULTCS/IUP35 @ISO 2002 Copyright Intemational Organization for Standardization without license from IHS Not for Resale ISO 17227:2002(E) Contents Page Foreword ...iv 1 Scope. 2 Normativereferences.. 3 Principle.. 4 Apparatus 5 Sampling and samplepreparation.. 6 Test conditions .. 7 Procedure. 8 Expressionofresults 9 Test report ili cense from IHS Not for Resale ISO 17227:2002(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through IsO technical liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/lECDirectives,Part2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Chemists Societies (IUP Commission,IULTCS)in collaboration with the European Committee for Standardization Agreement on technical cooperation between ISO and CEN (Vienna Agreement). It is based on IUP 35 originally titled "Heat resistance of industrial glove leather"and published in J. Soc. Leather Tech.Chem. 73, p.62, (1989) and declared an official method of the IULTCS in 1989. This updated version was published in J. Soc. Leather Tech. Chem. 84, p. 373, (2000) and reconfirmed as an official method in March 2001. The same principle is used but the text has been updated and includes the number of test pieces to be taken. ISO 2002- All rights reserved tional Organization for Standardizatlon Not for Resale ISO 17227:2002(E) INTERNATIONALSTANDARD Leather - Physical and mechanical tests Determination of dry heat resistance ofleather Scope This International Standard specifies a method of determining the dry heat resistance of conditioned leathers. It is applicable to all leathers. 2 Normativereferences only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)applies. ISO 2418 Leather-Chemical,physical andmechanicalandfastnesstests-Samplinglocation ISO 2419 3Principle A conditioned test piece is heated in an oven and the shrinkage determined and changes in flexibility are assessed manually. 4 Apparatus 4.1 Oven, fitted with a central rack capable of maintaining temperatures of 150 C ± 5 C, 200 C ± 5 °C and 250°C±5°C. 4.2 Vernier callipers, reading to 0,1 mm, 4.3 Support, for the test piece while it is being heated in the oven, to minimise contact with the oven rack, for examplea wiregrid orpipe-claytriangle 4.4 Stop clock, readable to 1 s. 4.5 Press knife, the inner wall which is a square of side 100 mm ± 1 mm as specified in IsO 2419. 5 Samplingand samplepreparation required by applying the press knife (4.5) to the grain surface, if distinguishable. NOTE If there is a requirement for more than two hides or skins to be tested in one batch, then only one test piece need be taken from each hide or skin, provided that the overall total is not less than three test pieces. 5.2 Using an indelible marker, mark measurement reference points A, B, C and D on the test piece in the positions shown in Figure 1. 1 Copyright Intern Not for Resale ISO17227:2002(E) BI LA 10 ±1, 100 ±1 10 ±1 C D 10 ±1 10 ±1 100 ±1 Figure1Location ofmeasurement referencepointsonatestpiece(alldimensions in millimetres±1mm) 5.3 Condition the testpieces in accordance with IsO 2419. 6 Test conditions 6.1 Oven temperature The o