BS ISO 18066:2015 pdf download

BS ISO 18066:2015 pdf download.Textiles — Manmade filament yarns — Determination of shrinkage in boiling water
1 Scope
This International Standard specifies a test method for the determination of the boiling water shrinkage of non-textured and textured multifilament yarns (made of polyester, polyamide, polypropylene,cellulose fibre, etc.)
Only automatic method is specified in this International Standard.
This International Standard is applicable to manmade filament yarns of linear density less than 3 000 dtex.
This International Standard is not applicable to partially oriented yarns.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of referenced document (including any amendments) applies.
ISO 139, Textiles — Standard atmospheres for conditioning and testing
ISO 3696, Water for analytical laboratory use — Specification and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 shrinkage in boiling water
decrease in length of a specimen as a result of thermal treatment in boiling water, expressed as a percentage of its original length, which measured under tension before and after treatment
4 Principle
Under specific condition, a test specimen is treated in boiling water. Shrinkage is calculated as variation in length, measured before and after treatment.
5 Apparatus and materials
5.1 Skein winding reel
a) Reel with a circumference of (1 000 ± 2,5) mm, driven either automatically or manually.
b) A traversing mechanism to avert overlapping while a number of skeins being wound at the same time.
c) A tensioning device, to an accuracy of ±10 %, maintaining tension within the recommended limits.
d) A device to count the turns of the reel, preferably warning or stopping winding automatically, just prior to the specified number of reel revolutions.
e) A mechanism to reduce the reel circumference is advisable for easy removal of the skein.
5.2 Automatic shrinkage tester (see Figure 1).
a) Automatically application of the specified tension, appliance to measure the length of the specimen and to calculate the shrinkage based on the length values.
b) Resolution of the length measurement is 0,05 mm .
c) Fitted with a specimen holder, over 600 mm high, in which a number of skeins arranged and tested in succession. Each skein is applied with a 2,5 cN load, which remains throughout the whole testing procedure.
b) A thermometer to measure and record the temperature in the vicinity of the specimens.
c) Forced ventilation as to maintain the temperature to an accuracy of ±3 °C.
5.5 Reagent
a) Distilled water or grade 3 water in accordance with ISO 3696.
b) Surfactant with wetting effect in concentration of 1 g/l.