IS 3421-1988

标准号：IS 3421-1988
发布日期：1989/6/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：1.1 This standard prescribes two methods for the quantitative chemical analysis of binary mixtures of acrylic, modacrylic fibres with wool, silk, cotton, polyamide, polyester, viscose, cupro, modal or glass fibres. It is suitable for application to fibres in any textile form, such as fibre, yarn or fabric. Method 2 is not applicable to acrylic fibres containing cellulosic fibres, silk and nylon (polyamide).1.1.1 It is applicable to acrylic fibres dyed with premetallized dyes but not to those dyed with after chrome dyes. It covers only those modacrylic fibres which are completely soluble in dimethyl formamide (DMF).NOTE — Before conducting an analysis according to this standard, the fibres present in the mixture should be iden-tified (see IS 667 : 1981 ) and the sample to be analysed should be freed from all non-fibrous matter ( see IS 9068 : 1979). Dye in the dyed fibre is considered to bean integral part of the fibre and is not to be removed.