DEAS 1140 : 2023  
ICS 59.080 .020 
 
© EA C 2023                                                                                                                              First Edition 2023  
 DRAFT EAST AFRICAN STANDARD  
Acrylic yarn — Specification  
EAST AFRICAN COMMUNITY  
 DEAS 1140: 2023  
ii © EAC 2023 – All rights reserved  
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 DEAS 1140 : 2023  
© EAC 2023 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  2 
4 Requirements  ................................ ................................ ................................ ................................ .........  3 
4.1 General requirements  ................................ ................................ ................................ ...........................  3 
4.2 Specific requirements  ................................ ................................ ................................ ...........................  3 
4.2.1  Linear density  ................................ ................................ ................................ ................................ ........  3 
4.2.2  Breaking ten acity  ................................ ................................ ................................ ................................ ... 3 
4.2.3  Package mass  ................................ ................................ ................................ ................................ ........  3 
4.2.4  Twist ................................ ................................ ................................ ................................ ........................  3 
4.2.5  Yarn unevenness  ................................ ................................ ................................ ................................ ... 3 
4.2.6  Fibre composition  ................................ ................................ ................................ ................................ . 4 
4.2.7  Colour fastness  ................................ ................................ ................................ ................................ ..... 4 
4.2.8  Restr icted colourants ................................ ................................ ................................ ............................  4 
4.2.9  Moisture regain  ................................ ................................ ................................ ................................ ...... 4 
5 Packaging  ................................ ................................ ................................ ................................ ...............  5 
6 Label ling ................................ ................................ ................................ ................................ .................  5 
6.1 Unit packages  ................................ ................................ ................................ ................................ ........  5 
6.2 Bulk package  ................................ ................................ ................................ ................................ .........  5 
7 Sampling  ................................ ................................ ................................ ................................ ................  5 
Annex  A (normative)  Determination of net mass of the package  ................................ ................................  6 
A.1 Principle  ................................ ................................ ................................ ................................ .................  6 
A.2 Apparatus  ................................ ................................ ................................ ................................ ...............  6 
A.3 Procedure  ................................ ................................ ................................ ................................ ...............  6 
Annex  B (normative)  Determination of moisture regain  ................................ ................................ ...............  7 
B.1 Principle  ................................ ................................ ................................ ................................ .................  7 
B.2 Apparatus  ................................ ................................ ................................ ................................ ...............  7 
B.3 Procedure  ................................ ................................ ................................ ................................ ...............  7 
B.4 Calculation  ................................ ................................ ................................ ................................ .............  7 
B.5 Report  ................................ ................................ ................................ ................................ .....................  7 
Bibliography  ................................ ................................ ................................ ................................ ........................  8 DEAS 1140: 2023  
iv © EAC 2023 – All rights reserved  
 Foreword  
Development of the East African Standa rds has been necessitated by the need  for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods and service s are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the National 
Standar ds Bodies in Partner States, together  with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including gover nment, academia, consumer groups, pri vate sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and incorporated bef ore finalization of standards, in 
accordance with the Principles and procedures for develop ment of East African Standards.  
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are there fore expected to ensure that they alw ays have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC /TC 061, Textiles , textile products 
and accessories . 
Attention is drawn to the  possibility that some of the element s of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
 DRAFT EAST AFRICAN STANDARD  DEA S 1140: 2023  
 
© EAC 2023 – All rights reserved  1 
 Acrylic yarn — Specification  
1 Scope   
This Draft East African Standard specifies  requirements , sampling and test methods of acrylic yarn to be used 
for machine weaving, hand weaving, hand knitting and machine knitting . 
2 Normative references   
The following documents are referred to in the text in such a way that some or all of their conte nt constitutes 
requirements 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.  
ISO 2, Textiles — Designation of the direction of twist in yarns and related products  
ISO 105 -B02, Textiles — Tests for colour fastness — Part B02: Colour fastness to artificial light: Xenon arc 
fading lamp test  
ISO 105 -C10, Textiles — Tests  for colour fastness — Part C10: Colour fastness to washing with  soap or soap 
and soda  
ISO 105-D02, Textiles — Tests for colour fastness Part D02: Colour fastne ss to rubbing: Organic solvents  
ISO 105-E04, Textiles — Tests for colour fastness Part E04: Colour fastness to perspiration  
ISO 105-X11, Textile — Tests for col our fastness Part X11: Colour fastness to hot pressing  
ISO 105-X12, Textile — Tests for colour fastness Part X12: Colour fastness to rubbing: Small areas  
ISO 1833 -12, Textiles — Quantitative chemical analysis — Part 12: Mixtures of acrylic, certain modacry lics, 
certain chlorofibres, certain elastane fibres with certain other fibres (metho d using dimethylformamide)  
ISO 2060, Textiles — Yarn from packages — Determination of linear density (mass per unit length) by the 
skein method  
ISO 2061, Textiles — Determ ination of twist in yarns — Direct counting method  
ISO 2062, Textiles — Yarns from packages — Determination of single -end breaking force and elongation at 
break using constant rate of extension (CRE) tester  
ISO 3758 , Textiles — Care labelling code using symbols  
ISO 14362 -1, Textiles — Test methods for determination of certain aromatic amines derived from azo 
colorants Part 1: Detection of the use of certain azo col orants accessible with or without extracting the fibres  
ISO 14362 -3, Textiles — Test methods  for determination of certain aromatic amines derived from azo 
colorants Part 3: Detection of the use of certain colorants, which may release 4 -amino azo benzene  DEAS 1140: 2023  
2 © EAC 2023 – All rights reserved  
 ISO 16373 -1, Textiles — Dyestuffs Part 1: General principles of testing coloured textiles for dyestuff 
identification  
ISO 16373 -2, Textiles — Dyestuffs — Part 2: General method for the determination of extractable dyestuffs 
including allergenic and carcinoge nic dyestuffs (method using pyridine -water)  
ISO 16373 -3, Textiles — Dyestuffs — Part 3: Meth od for determination of certain carcinogenic dyestuffs 
(method using triethylamine/methanol)  
ISO 16549, Textiles — Unevenness of textile strands — Capacitance metho d 
ISO 17202, Textiles — Determination of twist in single spun yarns — Untwist/retwist method   
ISO/TR 11827, Textiles — Compos ition testing -Identification of fibres  
3 Terms and definitions   
For the purpose s of this East African S tandard, the following terms and definitions shall apply . 
ISO and IEC maintain terminological databases for use in stand ardization at the following addre sses:  
— ISO Online browsing platform: available at  http://www.iso.org/obp  
3.1  
unevenness  
variation of linear density along the length of a continuous strand of yarns  
3.2  
tenacity  
tensile force per unit of linear de nsity of the unstrained specimen  
3.3  
linear density  
mass per unit length of a yarn  
3.4  
coefficient of variation of unevenness, CVU  
value of unevenness expressed as coefficient of variation  
3.5  
mean - deviation unevenness  
value of unevenness (3.1) expres sed as an average mean deviation  
3.6  
hairiness index  
total length of protruding fibres in the yarn in centimetres with reference to the sensing length of one 
centimetre yarn  
3.7  
tex 
number of grams per kilometre of yarn  DEAS 1140: 2023  
© EAC 2023 – All rights reserved  3 
 4 Requirements  
4.1 General requir ements  
4.1.1  The yarn shall be free from contamination such as  stains, dirt, foreign matter or any other defect that 
may affect its performance during use . 
4.1.2  The yarn packages shall be correctly and uniformly wound and s hall enable the removal of ya rn 
without difficulty and entanglement.  
4.2 Specific  requirements  
4.2.1 Linear density  
4.2.1.1  When tested in accordance with ISO 2060, the linear density shall be as declared on the label 
marking subject to a tolerance of ± 2% . 
4.2.1.2  The CV % of linea r density shall be a maximum of 2 % when determined in accordance with ISO 
2060 . 
4.2.2 Breaking tenacity   
When tested in accordance with ISO 2062, t he minimum breaking tenacity of yarn shall be as follows:  
a) Weaving yarn:  13 cN/te x; and  
b) Knitting yarn:   10 cN/tex . 
4.2.3 Package mass  
The net mass of the yarn package shall be not less than 98 % of the declared value  when tested in 
accordance with Annex A . 
4.2.4 Twist  
4.2.4.1 The number of turns per unit length shall be determined in accordance with ISO 2061 or ISO 
17202. The direction for twist shall be indicated by the capital letter “S” or “Z” as specified in ISO 2 . 
4.2.4.2 The CV% of twist shall be a maximum of 5 %.  
4.2.5 Yarn unevenness  
The yarn unevenness, expressed as maximum C V % and U  % shall be as given in Table 1. The yarn 
unevenness shall be tested in accordance with ISO 16549 . 
Table 1 — Yarn unevenness  
S/N Linear density,  
tex CV %,  
max. U %, 
max. 
i Finer than 20  18 14.4 
ii 20 – 30 16 12.8 
iii 30 – 40 14 11.2 
iv 40 – 50 12 9.6 DEAS 1140: 2023  
4 © EAC 2023 – All rights reserved  
 v 50 – 60 10 8 
vi Coarser than 60  ≤ 8 ≤ 6.4  
NOTE 1  When a nu mber falls under two linear density 
classes, it shall be categorized under the lower one . 
NOTE 2  CV% = 1.25 U%  
 
4.2.6 Fibre composition  
The fibre composition shall be 100 % acrylic fibres when tested in accordance with ISO 1833 -12 and ISO/TR 
11827 . 
4.2.7 Colour fastness  
The minimum colour fastness rating for dyed acrylic yarns shall be as given in Table 2 when tested in 
accordance with the test methods specified therein.  
Table 2 — Colour fastness requirements of acrylic yarn  
S/N Parameter  Numerical rating , 
min. Test method  
Colour change  Staining  
i Light  6 - ISO 105 –B02 
ii Washing  4 3 ISO 105 -C10 
iii Rubbing  Dry 4 4 
ISO 105 -X12 
Wet 4 3 
iv Perspiration  Acid 4 4 
ISO 105 -E04 
Alkali  4 4 
v Dry cleaning  4 4 ISO 105 -D02 
vi Hot pressing  4 4 ISO 1 05-X11 
 
4.2.8 Restricted colourants  
4.2.8.1  The colourants used on the acrylic yarns shall be free from those that are listed in ISO 16373 -2, 
ISO 16373 -3 and ISO 14 362-1 and ISO 14 362-3.  
4.2.8. 2 The colourants shall be identi fied in accordance with ISO 16373 -1. 
4.2.9 Moisture regain  
The acrylic yarns shall have a moisture regain value of not more than 2 % when tested in accordance with 
Annex B .  DEAS 1140: 2023  
© EAC 2023 – All rights reserved  5 
 5 Packaging  
Acrylic yarn packages shall be packaged in suitable packaging mater ials which shall protect the product from 
damage during transportation, handling and storage. The spools, cheeses or cones  may be packaged in unit 
packages and into bulk packs.  
6 Labelling  
6.1 Unit packages  
Each unit pa ckage shall bear a clear and ind elible l abel which shall inc lude the following particulars :  
a) manufacturer’s name or registered trade mark;  
b) the words “100 % acrylic yarn”;  
c) linear density in tex;  
d) the direction of twist ( S or Z) and number of plies for plied yarn;  
e) net mass in grams;  
f) care instr uction in accordance with ISO 3758;  
g) end use of yarn such as " weaving, knitting” country of manufacture;  
h) shade  number ; and  
i) batch/ lot number.  
6.2 Bulk package  
Each bulk package  shall bear the following information:  
a) manufacturers name or trade mark;  
b) the w ords “100 % acrylic yarn”;  
c) linear density in tex;  
d) net mass in kilograms;  
e) number of packages;  
f) End use of yarn such as "weaving, knitting” ; 
g) country of manufacture; and  
h) lot number.  
7 Sampling  
Sampling shall be done in accordance with ISO 28 59-1. DEAS 1140: 2023  
6 © EAC 2023 – All rights reserved  
 Annex  A 
(normative)  
 
Determination of net mass of the package  
A.1 Principle  
Mass of a package without wrappers is taken on a weighing balance. This is the net mass of package.  
A.2 Apparatus  
Weighing balance , capable of determining the mass of pac kages to an accura cy of ± 0.2 %  
A.3 Procedure  
A.3.1 Condition five specimens (packages) without wrappers in accordance with ISO 139 . 
A.3.2 Determine the mass of the conditioned specimens using the weighing balance (2.1).  
A.3.3 Calculate the average of the  mass obtained . 
A.3.4 Report the average net mass in grams.  DEAS 1140: 2023  
© EAC 2023 – All rights reserved  7 
 Annex  B 
(normative)  
 
Determination of moisture regain  
B.1 Principle  
A known mass of yarns is dried and then the loss in mass expressed as a ratio of the dry mass . 
B.2 Apparatus  
B.2.1 Weighing  balance , capable of weighing to an accuracy of 0.001 g  
B.2.2 Drying Oven , well ventilated with a temperature of 102 °C to 105 °C  
B.2.3  Desiccator , waterproof when sealed, will be used for transfer of analysed material and during 
weighing.  
B.3 Procedure  
B.3.1 From the sample und er test draw at least three test specimens each weighing approximately 5 g.  
B.3.2 Take a test specimen drawn as in A.3.1 and weigh it accurately  (M1) 
B.3.3 Dry it at a temperature of 102°C to 105°C until constant mass is obtained (se e note)  
B.3.4 Cool the test specimen in a desiccator and determine the oven -dry mass (M2).  
NOTE  The mass is usually regarded as constant if the loss between two successive weighing, taken at an interval of 
30 min does not exceed 0.1  per cent of the first of the two values.  
B.3.5 Similarly test the other test specimen(s).  
B.4 Calculation  
Moisture regain = 
%100 
22 1X 
MMM−  
B.5 Report  
Report the average of the value calculated in B.4 as the moisture regain in %.  DEAS 1140: 2023  
8 © EAC 2023 – All rights reserved  
 Bibliography  
[1] KS 496:  2018 , Acryli c yarn — Specification  
[2] US 2150: 2021, Textiles — Acrylic yarn — Specification  
 DEAS 1140: 2023    
 
© EAC 2023 – All rights reserved