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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 9994-2008 Conventional Moisture Regains of Textile Materials. The following changes have been made with respect to GB/T 9994-2008:
——"Blended products" is changed into "Multi-component products" and note in the “Scope” is deleted;
——Conventional moisture regains of cotton fabrics, wool woven fabrics, modal fibers, lyocell fibers and aramid fibers are modified;
——Conventional moisture regains of chitosan fiber, polytrimethylene terephthalate fiber, polybutylene terephthalate fiber, ultra high molecular weight polyethylene fiber, polyolefin elastic fiber, polyphenylene sulfide fiber, polyamide fibers and carbon fibers are modified;
——Fluorocarbon fibers and their conventional moisture regain are deleted.
This standard was proposed by China National Textile and Apparel Council.
This standard is under the jurisdiction of the National Technical Committee 209 on Textiles of the Standardization Administration of China (SAC/TC 209).
The previous editions of standard replaced by this standard are as follows:
——GB 9994-1988, GB 9994-2008, GB/T 9994-2008.
Conventional Moisture Regains of Textile Materials
1 Scope
This standard specifies the conventional moisture regains of main textile materials.
This standard applies to textile materials and may be used to calculate the conventional mass of textile materials, linear density of yarns, mass per unit area of fabrics, and the fiber content of multi-component products in quantitative analysis.
2 Normative References
The following referenced documents are indispensable for the application 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.
GB/T 4146.1 Textiles - Chemical Fibers - Part 1: Generic Names
GB/T 9995 Determination of Moisture Content and Moisture Regain of Textile - Oven-drying Method
GB/T 11951 Textiles - Natural Fibers - Generic Names and Definitions
3 Terms and Definitions
For the purpose of this standard, the terms and definitions specified in GB/T 4146.1 and GB/T 11951 and the followings apply.
3.1
textiles
general term for textile raw materials, semi-finished textile products and finished textile products used to process textiles
Note: they include various fibers, slivers, yarns, fabrics, etc.
3.2
moisture regain
percentage of the mass of water in any pattern in textile material to the dry mass of tested material, which is measured according to specified method
3.3
conventional moisture regain
conventional value of moisture regain of textile material
3.4
moisture regain in the standard atmosphere
moisture regain of textile material when reaching moisture equilibrium in the standard atmosphere after preconditioning
3.5
conventional mass
mass of material after drying plus the mass of corresponding conventional moisture regain
4 Conventional Moisture Regains of Textile Materials
See Table 1 for the conventional moisture regains of textile materials
Table 1
Fiber categories Textile materials Conventional moisture regain/%
Cotton Cotton fibers 8.5
Cotton yarns 8.5
Cotton sewing threads 8.5
Cotton fabrics 8.5
Fura Wool Scoured woolb (heterogeneous) 15.0
Scoured woolb (homogeneous) 16.0
Combed fallen wool 16.0
Regenerated wool 17.0
Dry-combed top 18.25
Oil-combed top 19.0
Worsted yarn 16.0
Woolen yarn 15.0
Wool and knitting wool 15.0
Wool woven fabric 15.0
Wool knitted fabric 15.0
Plush fabric 16.0
Cashmere Dehaired Cashmere 17.0
Cashmere top 15.0
Cashmere yarn 15.0
Cashmere fabric 15.0
Rabbit hair 15.0
Camel wool/hair 15.0
Yak wool/hair 15.0
Alpaca wool/hair 15.0
Mohair 14.0
Linen c Ramie 12.0
Flax 12.0
Jute 14.0
Hemp 12.0
Kender 12.0
Sisal 12.0
Silk d Mulberry silk 11.0
Tussah silk 11.0
Other natural fibers c Kapok 10.9
Cocoanut fiber 13.0
Chemical fiber c Viscose fiber 13.0
Polynosic 13.0
Modal fiber 13.0
Lyocell fiber 13.0
Cuprammonuium fiber 13.0
Acetate fiber 7.0
Triacetate fiber 3.5
Chitosan fiber 17.5
Polyamide fiber (nylon) 4.5
Polyester fiber Polyethylene terephthalate (polyester) 0.4
Polytrimethylene terephthalate fiber 0.4
Polybutylene terephthalatefiber 0.4
Polyacrylonitrile fiber (acrylic fiber) 2.0
Polyvinyl alcohol fiber (vinylon) 5.0
Polypropylene fiber 0.0
Polyethylene fiber 0.0
Ultra high molecular weight polyethylene fiber 0.0
Chlorofiber Polyvinyl chloride (chloro fiber) 0.0
Polyvinylidene dichloride 0.0
Spandex 1.3
Fluorofiber 0.0
Aromatic polymide fiber (aramid fiber) Aramid fiber 1313 5.0
Aramid fiber 1414 (high modulus) 3.5
Aramid fiber 1414 (other) 7.0
Polylactic acid fiber 0.5
Polyolefin elastic fiber 0.0
Elastodiene fiber (rubber) 0.0
Polyphenylene sulfide fiber 0.1
Polyimide fiber 1.5
Other fiber c Carbon fiber 0.0
Glass fiber 0.0
Metal fiber 0.0
a Except wool and cashmere, other animal hair fibers contain fibers, yarns and fabrics.
b Scoured wool contains carbonized hair.
c Contains fibers, yarns and fabrics.
d Contains raw silk, doupion silk, spun silk, bourtte silk, processed silk and whitened, printed and dyed fabrics etc.
5 Fibers with Unknown Moisture Regain and Moisture Regain of Their Products
5.1 For other fibers and their products with new or unknown conventional moisture regain, the moisture regain of fiber state in standard atmosphere may be used to replace the conventional moisture regain.
5.2 The determination of moisture regain in the standard atmosphere shall meet the requirements specified in GB/T 9995.
Note: where the moisture regain in the standard atmosphere is used to replace the conventional moisture regain, corresponding explanation shall be made.
6 Moisture Regain of Multi-component Products
6.1 The conventional moisture regain of multi-component products is obtained by weighted average according to the conventional moisture regain and blending ratio of each component raw materials, and is rounded to one decimal place.
6.2 The conventional moisture regain of multi-component products may be calculated according to dry mass blending ratio, or may be calculated according to conventional mass blending ratio; see Formulas (1) and (2).
The conventional moisture regain (R) is calculated according to dry mass blending ratio, and is expressed in %:
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Conventional Moisture Regains of Textile Materials
5 Fibers with Unknown Moisture Regain and Moisture Regain of Their Products
6 Moisture Regain of Multi-component Products
7 Calculation of Conventional Mass
