1、CEN EN*ISO*5079 95 3404589 OL2619b 889 BRITISH STANDARD Textiles - Fibres - Determination of breaking force and elongation at break of individual fibres The European Standard EN IS0 5079 : 1995 has the status of a British Standard ICs 59.060 BS EN IS0 5079 : 1996 NO COPYING WITHOUT BSI PERMISSION EX
2、CEPT AS PERMITTED BY COPYRIGHT LAW !%m CEN EN*ISO*5079 95 3404589 O126197 715 BS EN IS0 5079 : 1996 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee TCI/24, Physical testing of textiles, upon which the following bodies wer
3、e represented Association of Consulting Scientists Association of Suppliers to the British Clothing industry British Apparel and Textile Confederation British Measurement and Testing Association British Polyolefin Textiles Association British Textile Machinery Association British Textile Technology
4、Group British Throwskrs? Association Furniture industry Research Association International Wool Secretariat Ministry of Defence SATRA Footwear Technology Centre Society of Dyers and Colourists Textile Finishers? Association Textile Institute This British Standard, having been prepared under the dire
5、ction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 16 May 1996 O BSI 1996 Amendments issued since publication Amd.No. IDate 1 Text affected The following BSI references relate to the work on this standard: Committe
6、e reference TCU24 Draft for cornent 93B06144 DC I I ISBN O 680 26726 6 CEN EN*IS0*5077 75 m 3404587 OL2bL98 651 m BS EN IS0 5079 : 1996 Contents Committees responsible National foreword page Inside front cover u Foreword 2 1 2 3 4 6 6 7 8 9 10 Scope Normative references Definitions Principle Apparat
7、us and reagents Conditioning and testjng atmospheres Procedure Expression of results Test report sampling 3 3 3 4 4 5 5 5 6 6 Annexes A (informative) Mounting of test specimens 8 ZA (normative) Normative references to international publications with their Table 1 Pretension forces 5 Figure 1 Wical f
8、orcdelongation curve 4 relevant European publications 9 O BSI 1996 i CEN EN*IS0*5079 95 W 3404589 OL2bL9 598 W BS EN IS0 5079 : 1996 National foreword This British Standard has been prepared by Technical Committee TCI/24 and is the English language version of EN IS0 5079 : 1995, Tat b) the mean elon
9、gation at break of the fibres tested, expressed in percent to two significant figures; c) the coefficients of variation, expressed as a per- centage of the breaking force and as a percentage of the elongation at break, to the nearest 0.1 %; 3404587 0326205 633 d) the 95 % confidence intervals of the
10、 breaking force expressed in centinewtons, and of the elongation at break expressed in percent, rounded off to the same precision as the mean values; e) if required, the breaking tenacity, in centinewtons per tex, to the nearest 0,l cN/tex. For the purposes of this International Standard, the breaki
11、ng tenacity can be calculated by either a) dividing the breaking force for each fibre by the linear density for the same fibre, measured in ac- cordance with IS0 1973 using the vibroscope method. In this case the mean breaking tenacity and coefficient of variation can be calculated; or b) dividing t
12、he mean breaking force by the mean value of linear density of the laboratory sample, measured in accordance with IS0 1973 using the gravimetric method. If applicable, a) is the preferred method. 10 Test report The test report shall include the following information. 10.1 General reference to this In
13、ternational Standard and date of test; complete identification of the sample; type of package and its condition (e.g. raw, bleached, dyed); conditioning and testing atmosphere used and/or the wet-state treatment of the specimens; sampling scheme used, number of specimens tested and number of fibres
14、discarded because of jaw breaks and/or slippage; type of clamps and jaws used; initial length, rate of elongation, in percent per minute, and pretension; any deviation, by agreement or otherwise, from the procedure specified. CEN EN*ISO*5079 95 3404589 0326206 558 Page 7 EN IS0 5079 : 1995 10.2 Test
15、 results d) 95 % confidence intervals of breaking force in centinewtons, and elongation at break in percent; a) mean breaking force, in centinewtons; e) mean linear density of the fibres, in decitex (if b) mean elongation at break, in percent; breaking tenacity is required), as well as the method us
16、ed for determination of linear density; c) coefficients of variation, in percent of the breaking force and in percent of the elongation at break; breaking tenacity (if required), in centinewtons per tex. f) CEN EN*IS0+5079 95 3404587 O326207 494 Page 8 EN IS0 5079 : 1995 Annex A (informative) Mounti
17、ng of test specimens A.l Great care should be taken to ensure that the fibre is not damaged during mounting; for example, the length of the fibre under test should not be held with tweezers. A.2 For brittle fibres, a carrier may be used as fol- lows. A rectangular hole, the length of which is equal
18、to the gauge length, is cut into a thin card and the fi- bre is mounted across the hole by means of some suitable adhesive. It is essential that the adhesive should not spread over the length of the fibre under test. After the specimen is clamped, cut the sides of the carrier which are parallel to t
19、he fibre axis. For wet tests, both the card and the adhesive should be re- sistant to water. A.3 should be attached to the test specimen. For pretensioned mounting, suitable fibre clips CEN EN*IS0*5079 95 = 3404589 Olt26208 320 Page 9 EN IS0 5079 : 1995 Annex ZA (normative) Normative references to i
20、nternational publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These nonnative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated r
21、eferences, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. Publication Year ltle IS0 139 1973 T Fax: O181 996 74
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