ISO 8516 pdf download Textile glass — Textured yarns — Basis for a specification
This International Standard provides a basis for a specification applicable to textured yarns made from singleor folded yarns of textile glass.
Textured glass yarns can be produced by several types of process. They can be made starting either from asingle strand or from two or more strands in which one or more have been “opened” to give the “bulky” aspectof textured yarn.
Textured glass yarn is used in various applications, for example insulation，filtration, the manufacture ofdecorative textiles, the reinforcement of plastics and the manufacture of packing materials.
The following referenced documents are indispensable for the application of this document.For datedreferences,only the edition cited applies.For undated references,the latest edition of the referenceddocument (including any amendments) applies.
ISO 472, Plastics – Vocabulary
ISO 1887,Textile glass -Determination of combustible-matter content
ISO 1888,Textile glass — Staple fibres or filaments —Determination of average diameterISO 1889, Reinforcement yarns – Determination of linear density
ISo 2078,Textile glass – Yarns — Designation
ISO 3341,Textile glass — Yarns —Determination of breaking force and breaking elongationISO 3344,Reinforcement products – Determination of moisture content
3Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 apply.
The designation of the yarn shall conform to lSO 2078.
5 Physical properties5.1General
Unless otherwise agreed, textured glass yarns shall be defined by the characteristics specified in 5.2 to 5.7,and nominal values and tolerances shall be given for these characteristics in the supplier’s technicalspecification.
The criteria for acceptance or rejection of a batch, based on the results of testing, shall also be given in thesuppliers specification.
5.2Type of glass
Various types of glass are used in the production of textured yarns. A list of available glass types is given inISO 2078.
The texturizing process requires the use of yarn covered with size to give suitable lubrication duringtexturization.This size can be eliminated after weaving by a heat-cleaning treatment, if necessary. The sizecontent shall be determined in accordance with ISO 1887.
5.4Average filament diameter
The average filament diameter shall be determined in accordance with ISO 1888.
The linear density shall be determined in accordance with IS0 1889，taking care，when taking the testspecimens,that the yarn is tensioned to a level suitable for staple-fibre yarms in order to ensure that thespecimens will be of the required length.
The moisture content shall be determined in accordance with lSO 3344.
At the yield point, textured yarn can possess a strength which is much less than the breaking load. If this is thecase, the supplier’s specification shall indicate the minimum value of the strength at yield and the minimumvalue of the breaking strength, as determined in accordance with ISO 3341.