BS ISO 7211‑5:2020 pdf download.Textiles — Methods for analysis of woven fabrics construction.
1 Scope
This document specifies methods for the determination of linear density of yarn removed from fabric. It relates to yarns of nominally uniform linear density. It describes the method of removing threads from fabric, and specifies the number of threads whose straightened length is to be determined and the methods of determining the mass of all the threads.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 139. Textiles — Standard atmospheres for conditioning and testing
ISO 1833-1, Textiles — Quantitative chemical analysis — Part 1: General principles of testing
ISO 72llr3 Textiles — Woven fabrics — on.struction — Methods of analysis — Part 3: Determination of crimp ofyarn in fabric
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:JJwww.iso.org/obp
— IEC Electropedia: available at http://www.electropediaorg/
4 Principle
Threads are removed from rectangular strips of fabric, the straightened length 01 a portion ot them is determined and their mass is determined either in equilibrium with the standard atmosphere for testing (method A) or oven-dry plus the agreed moisture regain (method B). Linear density is calculated from the mass and the sum of the straightened lengths.
NOTE The agreed moisture regain of each fibre is specified in some regional legislation or after agreement between interested parties.
When heating to 105 °C is likely to cause appreciable loss of volatile matter other than water it is recommended to use method A.
The determination can be carried out without removal of nonfibrous matter see Clause 8), or after removal of non-fibrous matter (see Clause 9).
11 Test report
The test report shall include at least the following particulars:
a) a reference to this document, i.e. ISO 7211‑5:2020;
b) atmosphere used (standard or one of the alternative atmospheres);
c) actual method used, i.e. method A or method B, either
1) without removal of non-fibrous matter (see Clause 8), or,
2) after removal of non-fibrous matter (see Clause 9);
d) method used for removal of non-fibrous matter, if carried out;
e) agreed moisture regain, if method B is carried out;
f) linear density of the warp;
g) linear density of the weft;
h) date of the test;
i) any unusual features observed;
j) details of any deviation from the given procedure.BS ISO 7211‑5 pdf download.