1、INTERNATIONAL ORGANIZATION FOR STANOAROIZATION METnYHAPOnHAR OPrAHmAUHR no CAHAPAU.ORGANSATON NTERNATONALE DE NORMALSA,O Fishing nets - Designation of mting yarns in First edition - 1973-12-01 iii UDC 677.061 : 677.66 : 639.2.08.11 Ref. No. IS0 858-1973 (E) 2 (5) Descriptors : textiles, yarns, nets,
2、 fishing nets, linear density, units of measurement, Tex System, designation z M 8 Price based on 2 pages FOREWORD IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 Member Bodies). The work of developing International Standards i
3、s carried out through IS0 Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work
4、. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 858 was drawn up by Technical Committee ISO/TC 38, Textiles, and circulated to the Me
5、mber Bodies in October 1972. It has been approved by the Member Bodies of the following countries : Australia Belgium Bulgaria Canada Czechoslovakia Denmark Finland France Germany Hungary India I ran Israel Italy Netherlands New Zealand Poland Portugal Romania South Africa, Rep. of Sweden Switzerlan
6、d Thailand Turkey United Kingdom U.S.S.R. No Member Body expressed disapproval of the document. This International Standard cancels and replaces IS0 Recommendation R 858 - 1968. 0 International Organization for Standardization, 1973 l Printed in Switzerland INTERNATIONAL STANDARD IS0 858-1973 (El Fi
7、shing nets - Designation of netting yarns in the Tex System 0 INTRODUCTION The designation of netting yarns for fishing nets in the Tex System will ultimately replace designations made according to traditional systems. The new designation will consist principally in naming the resultant linear densi
8、ty. 1 SCOPE This International Standard specifies a method for the designation of netting yarns for fishing nets by the use of the nominal linear densities of the single yarn components or of their resultant linear density, expressed in tex. 2 FIELD OF APPLICATION As a general rule, netting yarns de
9、signated by their linear density or their resultant linear density are usually grey yarns without any preparation. If the indication of resultant linear density takes account of any effects of chemical or physical treatment, this shall be mentioned. 3 REFERENCES IS0 2, Textiles - Designation of the
10、direction of twist in yarns and related products. I SO 1139, Textiles - Designation of yarns. IS0 1144, Textiles - Universal system for designating linear density (Tex System). 4 METHOD OF DESIGNATION 4.1 Yarns obtained by twisting 4.1 .I General usage, complete designation The complete designation
11、of a netting yarn shall comprise, in the order given, the following five characteristics : a) the linear density of the single yarn, expressed in tex; b) the number of single yarns in the first fold; c) 1) the number of folded yarns in the finished product, or, if suitable, 2) the number of folded y
12、arns, then cabled yarns, in the finished product; d) the resultant linear density, expressed in tex; e) the final twist direction of the finished product. The first three characteristics shall be joined to each other by the multiplication sign (X); (if suitable, the number of cabled yarns is joined
13、likewise to the number of folded yarns by the multiplication sign). The last two characteristics shall be separated from the first three by a semi-colon (;). The fourth characteristic (numerical value of the resultant linear density) shall be preceded by the letter R. The fifth characteristic shall
14、be indicated by the letter S or 2 (see IS0 2). 1 IS0 858-1973 (El Example I: 23 tex X 3; R 75 tex S. This designation characterizes a folded netting yarn comprising three single yarns of a nominal1 ) linear density of 23 tex; the resultant linear density of this yarn is 75 tex; the final twist direc
15、tion is S. Example 2: 23 tex X 6 X 3; R 460 tex 2. This designation characterizes a cabled netting yarn composed of three folded yarns each of which comprises six single yarns of a nominal) linear density of 23 tex ; the resultant linear density of this yarn is 460 tex; the final twist direction is
16、2. 4.1.2 Particular cases, brief designation Yarns composed of dissimilar components and heavy twisted trawl twines, complete designations of which would be too complicated, shall be designated by a) the resultant linear density; b) the final twist direction of the finished product. Example 3 : Nett
17、ing yarn R 4000 tex S. 4.2 Yarns obtained by braiding Braided netting yarns shall be designated only by their resultant linear density. Example 4 : Braided yarn R 4000 tex. NOTE- The resultant linear density of a netting yarn is always different from the total linear density of the same yarn calcula
18、ted from the linear densities of its components Reverting to Example 2 (see 4 1 I) : if a netting yarn has a designation of 23 tex X 6 X 3; R 460 tex 2, calculation of the total linear density of this yarn on the basis of its components gives The difference between the calculated total linear densit
19、y in tex and the resultant linear density of R 460 tex, namely 46 tex, accrues from the twisting and cabling undergone by the yarns, each one of these operations leading to an increase in the linear density of the yarns. 1) The term “nominal” indicates that the value is a matter of reference, useful solely for the designation. 2
