ICS 59.080.01  
W04  
GB  
 
National Standard of the People’s 
Republic of China  
                                      GB 9994 —××××  
                                (Replacing GB 9994 -1988)  
 
 
Conventional Moisture Regains of 
Textiles  
 
 (For approval)  
 
 
 
 
 
 
 
 
 
 
 
 
Published : xx-xx-xxxx                  Implemented : xx-xx-xxxx  
 
 
Published by the General Administration of Quality Supervision, Inspection 
and Quarantine of the People’s Republic of China 
 
GB 9994 —×××× I  
 
 
 
Foreword  
Chapter IV of this Standard conta ins compulsory provisions.  
 
This Standard replace s GB 9994 -1988 Conventional Moisture Regains of Textiles . 
 
The main di fference s between this Standard and GB  9994 -1988 include : 
 
1. Revised applicable scope;  
2. Increased number of fibre  names and reference s used to introduce methods for measuring moisture 
regains;  
3. Addition of  3 technical terms, namely moisture regains, standard moisture regains  and conventional 
quality, deletion of commercial weight terms and calculative formats;  
4. Addition of  conven tional moisture regain s for cashmere wool and fabrics, wool and knitting fabrics, 
mohair, alpaca, Modal fibre , tri-acetate fibre , polyethylene fibre , aramid fibre , rubber, polylactic 
fibre , fluorocarbon fibre, glass fibre  and metal fibre ; 
5. Conversion of the notes in the conventional moisture regain provisions for blended fibre  materials 
to footnotes;  
6. Delet ion of  notes in the previous Chapter V;  
7. Addition of  fibres  with unknown conventional moisture regains and the moisture regains of the 
products thereo f in Chapter V;  
8. Addition of  calculation for conventional quality in Chapter VII;  
9. Delet ion of  the previous Appendix A.  
  
  
This Standard has been proposed by the China National Textile & Apparel  Council ; 
This Standard is under the jurisdiction of  the Basic Standards Subcommittee of the National Technical 
Committee on Textile Standardization (SAC/TC209/SC1);  
Bodies responsible for drafting this Standard: Textile Industry  Standardization Institute  and Textile 
Industry  Science Development Centre ; 
This Stand ard was drafted by Zheng Yuying and Dou Ruzhen.  
This is the first revision  of this Standard . 
 
 
 
 
 
 
 
 
 
 
 
 GB 9994 —××××   
 
Conventional Moisture Regains of Textiles  
 
1. Scope  
 
This Standard specifie s the conventional moisture regains of major textiles.  
This Standard applies to  textiles and can be used to calculate conventional textile quality, yarn  density , 
unit mass of fabrics and fibre  content in blended textile product quantitative analysis.  
Note: Blended textile products include wrapped yarn, interlacin g fabric and other multi -component 
products.  
 
2. Normative reference documents  
 
The following documents contain provisions which, through reference in this Standard, constitute 
provisions of this Standard. With regard to dated references, subsequent amendm ents (not to include 
corrections) or revisions to any of these publications shall not be applicable, however, all parties 
which reach an agreement with regard to this Standard are encouraged to investigate whether the latest 
edition of these documents can be applied. With regard to undated references, the latest edition of the 
document referred to shall apply.  
GB/T 4146   Textile terms (chemical fibre  section)  
GB/T 9995   Measurement of moisture content and moisture regains for textiles   Oven drying 
metho d 
GB/T 11951   Textiles   Natural fibre   Terminology  
  
3. Terms and definitions  
 
Terms and definitions established in GB/T 4146 and GB/T 11951, as well as the following terms and 
definitions are applicable to this Standard . 
 
3.1 Textiles  
General name for raw materials, semi -finished products to be processed into textiles and 
finished products, including all of the fibre s, textile slivers, yarns and fabrics  therein . 
3.2 Moisture regain  
The percentage of the  mass  of water  which exist s in any form in the text iles measured using the 
regulated method to the dry mass of the measured material.  
3.3 Conventional moisture regain  
The agreed conventional moisture regain value for textiles.  
3.4 Moisture regain in standard atmosphere  
The moisture regain after a textile is pre-conditioned and reache s its moisture balance in standard 
atmosphere.  
3.5 Conventional mass  
The textile mass of the dried mass plus the mass corresponding to the conventional mass.  
 
4 Conventional moisture regains of textiles  
 
The conventional moist ure regains of textiles are listed in Table 1 .   
 
 
 GB 9994 —××××   
 
Table 1  
Fibre  type  Textile  Conventional moisture regain 
(%) 
Cotton fibre 8.5 
Cotton yarn  8.5 
Cotton sewing thread  8.5 Cotton  
Cotton fabric  8.0 
Wool   
Scoured woolb (hetero geneous fleece)  15.0 
Scoured woolb (homogeneous fleece)  16.0  
Comber noil  16.0  
Reused wool  17.0  
Dry combed top  18.25  
Oil combed top  19.0  
Worsted yarn  16.0  
Woollen  yarn  15.0  
Wool fabric  14.0  
Wool and knitting yarn  15.0  
Wool and k nitting fabric  15.0  
High pile fabric  16.0  
Cashmere   
Dehaired cashmere  17.0  
Cashmere slice  15.0  
Cashmere yarn  15.0  
Cashmere fabric  15.0  
Rabbit hair  15.0  
Camel hair  15.0  
Yak hair  15.0  
Alpaca hair  15.0  Wool a 
Mohair  14.0  
Rami e 12.0  
Flax 12.0  
Jute 14.0  
Hemp  12.0  
Kender  12.0  Linenc 
Sisal 12.0  
Mulberry silk  11.0 Silk d 
Tussah silk  11.0 
Ceiba fibre 10.9 Other natural fibres c 
Coconut fibre 13.0 
Viscose fibre 13.0 
Polynosic fibre 13.0  
Modal fibre 11.0  
Lyocell fibre 10.0  
Acetate fibre 7.0  
Tri-acetate fibre 3.5  
Cupro fibre 13.0  
Polyamid fibre (nylon)  4.5  
Polyester fibre (terylene)  0.4  
Polyacrylonitrile fibre (PVN)  2.0  
Polyvinyl alcohol fibre (vinylon)  5.0  
Polypropylene  fibre (PE-PP) 0.0  Chemical fibres c 
Polyethylene fibre (PE)  0.0  
 
 Table 1  (continued)  
Fibre  type  Textile  Conventional moisture regains (%)  
Chloro fibre  
PVC  0.0 
PVDC  0.0  
Polyproplyene  1.3  
Fluoro fibre 0.0  
Aromatic polyamide fibre (Aramid  
fibre)  
Ordinary  7.0 
High modulus fibre 3.5  
Polyactic fibre (PLA)  0.5  
Elastoliene fibre (rubber)  0.0  Chemical fibres c 
Fluorocarbon fibre 0.0  
Other fibre s c Glass fibre 0.0  
 Metal fibre 0.0  
a Besides wool and cashmere, other animal hair fibres all contai n fibres, yarns and fabrics.  
b Scoured wool contains carbonized wool.  
c Contains fibre , yarn and fabric.  
d D contains raw silk, doupion silk, spun silk, noil silk and bleached, printed and dyed fabric.  
 
5. Fibre  with unknown moisture regains and the mois ture regains of its products  
 
5.1 For other new-type fibre s and the products thereof, or those with unknown moisture regains, the 
fibre -state moisture regain in standard atmosphere can be substituted for conventional moisture regain.  
 
5.2 The conventional moisture regains shall be measured in accordance with the requirements of GB/T 
9995.  
 
Note: A corresponding note shall be made where the moisture regain in standard atmosphere is used to 
substitute for conventional moisture regain . 
 
6. The moisture regains  of blended textile products  
 
6.1 The conventional moisture regains of blended textile products shall be calculated by comparing 
the weight average value of the conventional moisture regains of each of its component raw materials  
with the blended textile , and rounded up to the nearest decimal point . 
 
6.2 The conventional moisture regains of blended textile products can be calculated using the blending 
proportion by dry mass or the blending proportion by conventional mass , see Form ulae (1) and (2).  
 
Note: To facilitate the calculation, the blending proportion by conventional mass is usually converted into the blending 
proportion by dry mass, after which the calculation can be done using Formula (1).  
 
a) The conventional moisture regain (R) is calculated by blending proportion by dry mass and 
expressed as a percentage:
 
 
b) The conventional moisture regain (R) is calculated by the blending proportion by conventional 
mass and expressed as a percentage:   
Where ,  
 
A1, A2 ……An – Blending proportion by dry weigh ts of fibre  components in %;  
B
1, B
2 ……B
n – Blending proportion by conventional mass of fibre  components in %;  
R
1, R
2 …… R
n – Conventional moisture regain of each fibre components in %.  
 
7. Calculation of conventional mass  
 
7.1 The conventional mass  (M r) of a single fibre is calculated using Formula (3).  
 
Where , M
d – Dry mass with the same unit as conventional mass;  
        R – Conventional moisture regain in %.  
7.2 The conventional mass (M r) of blended products is calculated using Formula (4).  
 
 
Whe re,  
M
d1, M
d2 …… M
dn – Dry mass of each fibre  component of a blended product with the same unit as the 
conventional mass;  
R
1, R
2…… R
n - Conventional moisture regain of each component in %.