ISO-9073-1-1989.pdf
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1、INTERNATIONAL STANDARD IS0 9073-I First edition 1989-07-01 Textiles - Test methods for nonwovens - Part I : Determination of mass per unit area Textiles - M an alternative specification for dimensions of test piece; a greater accuracy for the balance. Copyright International Organization for Standar
2、dization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- This page intentionally left blank Copyright International Organization for Standardization Pro
3、vided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 19:45:26 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 9073-I : 1989 (E) Textiles - Test methods for nonwovens - Part 1 I Determination
4、 of mass per unit area 1 Scope This part of IS0 9073 specifies a method for the determination of mass per unit area of nonwovens. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 9073. At the time of pu
5、blication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 9073 are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 main- tain registers
6、of currently valid International Standards. IS0 139 : 1973, Textiles - Standard atmospheres for con- ditioning and testing. IS0 186 : 1985, Paper and board - Sampling to determine average quality. IS0 3801 : 1977, Textiles - Woven fabrics - Determination of mass per unit length and mass per unit are
7、a. 3 Principle Measurement of the area and mass of a test piece and calcu- lation of its mass per unit area in grams per square metre. 4 Apparatus 4.1 Apparatus for cutting the test pieces, chosen from among the following. 4.1.1 Die, which cuts a test piece of an area of at least 50 000 mm*. 4.1.2 T
8、emplate, with an area of at least 50 000 mm* (e.g. 250 mm x 200 mm) and a razor blade. 4.1.3 Steel rule, accurately graduated in millimetres, and a razor blade. 4.2 Balance, capable of determining the mass of a test piece to an accuracy of + 0,l % of the determined mass. 5 Sampling Carry out samplin
9、g in accordance with IS0 186. NOTES 1 The optimum sample size will vary with different nonwovens and should be agreed between purchaser and vendor. The size should preferably not be smaller than the size specified in 4.1 due to anisotropy of various nonwovens. 2 Attention is drawn to the fact that w
10、ith nonwovens, sampling error may be greater than the testing error. 3 This method of sampling recognizes and makes provisions for “anisotropy” (differences in properties along various directions, prin- cipally machine and cross direction) in the final specimens. However, these specimens are random
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