BS ISO 7211-5:2020 pdf free.Textiles – Methods for analysis of woven fa brics construction.Determination of linear density of yarn removed from fabric.
BS ISO 7211-5 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一Standard atmospheres for conditioning and testing ISO 1833-1, Textiles一Quantitative chemical analysis一Part 1: General principles of testing ISO 7211-3, Textiles一Woven fabrics一Construction 一Methods of analysis一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:一ISO Online browsing platform: available at https://www.iso.org/obp 一IEC Electropedia: available at http://www.electropedia.org/Threads are removed from rectangular strips of fabric, the straightened length of a portion of 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].BS ISO 7211-5 pdf download.