 DRAFT UGANDA STANDARD  
  DUS 949-2 
Second  Edition  
2020 -mm-dd 
 
 
 Reference number  
DUS 949-2: 2020 
© UNBS 2020   
  
Textiles — Upholstery fabrics — Part 2: Knitted upholstery 
fabric — Specification   
 DUS 949-2: 2020  
ii © UNBS 2020  – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a cont ract. Users are 
responsible for its correct application  
© UNBS 2020   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying an d microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 414 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  
 DUS 949-2:2020  
© UNBS 2020  – All rights reserved  iii 
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the La ws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consumer groups, private sector and other interested parties.  
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments.  The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 7, Textiles, Leather and 
Paper products , Subcommittee SC  1, Textiles and Related products . 
This second edition cancels and replaces the first edition ( US 949-2:2011 ), which has been technically 
revised.  DUS 949-2: 2020  
iv © UNBS 2020  – All rights reserved  
 Introduction  
The assessment of upholstery fabrics is a complicated task.  There is a multitude of experimental data 
available, but inter -laboratory testing show a large scattering of test results, in particular for abrasion testing, 
thus leading to important differences in quality perception. Furthermore the correlation between  laboratory 
testing and actual wear behaviour in practice is not very well established.  
Other characteristics like flammability specifications and requirements are so detailed, complex and all 
encompassing that separate, dedicated pieces of literature and information are required for each flammability 
specification.  
It is not possible to divide upholstery fabrics into just a few performance classes, because of the enormous 
variety of conditions of use. Also the type of upholstery (firm or soft) influences t he abrasion of the upholstery 
fabric and hence the requirements to the abrasion resistance. There is for example a tremendous difference 
between furniture used in a room without windows and furniture which is directly exposed to sunlight, or 
between furnit ure used by elder people and furniture used by a family with small children. These differences in 
conditions and severity of use necessitate a flexible approach. Hence no single performance specification can 
possibly apply to all the various fabrics that c ould be utilized for this end use. In certain instances , the 
specification provided by the ultimate consumer should be taken into consideration.  
 DRAFT UGANDA STANDARD  DUS 949-2: 2020  
 
© UNBS 2020  – All rights reserved  1 
 Textiles — Upholstery fabrics — Part 2: Knitted upholstery 
fabric — Specification  
1 Scope   
This D raft Uganda  standard specifies the requirements, methods of test and sampling for knitted upholstery 
fabrics as used in the manufacture of indoor furniture. It is not applicable to fabrics used in contract, porch, 
deck and lawn furniture, nor for woven fabrics, bound ed or laminated fabrics, or surface coated fabrics (such 
as vinyls and urethanes).  
2 Normative references   
The following referenced documents are referred to in the text in such a way that some or all of their content 
constitutes requirements of this docum ent. For dated references, only the edition cited applies. For undated 
references, the latest edition of the referenced document (including any amendments) applies.  
ISO 105 -B02, Textiles — Tests for colour fastness — Part B02: Colour fastness to artificial  light: Xenon arc 
fading lamp test  
ISO 105 -E01, Textiles — Tests for colour fastness — Part E01: Colour fastness to water   
ISO 105 -G02, Textiles — Tests for colour fastness — Part G02: Colour fastness to burnt gas fumes   
ISO 105 -X05, Textiles — Tests for colour fastness — Part X05: Colour fastness to organic solvents   
ISO 105 -X12, Textiles — Tests for colour fastness — Part X12: Colour fastness to rubbing   
ISO 5077, Textiles — Determination of dimensional change in washing and drying   
ISO 6941, Textile fab rics -- Burning behaviour -- Measurement of flame spread properties of vertically oriented 
specimens   
ISO 10528, Textiles — Commercial laundering procedures for textile fabrics prior to flammability testing   
ISO 12138, Textiles — Domestic laundering proced ures for textile fabrics prior to flammability testing  
ISO 12947 -1, Textiles — Determination of the abrasion resistance of fabrics by the Martindale method — Part 
1: Martindale abrasion testing apparatus   
ISO 12947 -2, Textiles — Determination of the abrasi on resistance of fabrics by the Martindale method — Part 
2: Determination of specimen breakdown   
ISO 13934 -2, Textiles — Tensile properties of fabrics — Part 2: Determination of maximum force using the 
grab method  
ISO 13936 -1, Textiles — Determination of t he slippage resistance of yarns at a seam in woven fabrics — Part 
1: Fixed seam opening method    
2 © UNB S 2020  – All rights reserved  
 ISO 13937 -3, Textiles — Tear properties of fabrics — Part 3: Determination of tear force of wing -shaped test 
specimens (Single tear method)  
3 Terms and definiti ons  
For the purposes of this document, the following terms and definitions apply.  
3.1  
contract furniture  
furniture manufacture for use in non -household application  
3.2  
furniture covering  
general term for attached upholstery fabric  
3.3  
upholstery f abric  
exterior fabric covering to a furniture unit  
3.4  
knitted fabrics  
fabric manufactured by intermeshing of loops ( interlo ping) of yarns  
4 Requirements  
4.1 General requirements  
4.1.1  The upholstery fabrics used in the manufacture of this end product  shall be of knitted material.  
4.1.3  Flammability requirements shall be as agreed upon between the purchaser and supplier, provided 
they meet or e xceed that specified under 4.2.2  
4.1.4  In addition to the specifications listed in Table 1, upholstery fabrics  shall meet the performance profile 
claimed by the manufacturer or required by the ultimate consumer.  
NOTE  It should be recognised that fabrics can be produced utilizing almost an infinite number of combinations of 
construction variables (type of fibre, pe rcentage of fibre, yarn twist, yarn count, chemical and mechanical finished, etc.) 
Hence no single performance specification can possibly apply to all the various fabrics for this end -use. In such cases, the 
specification of the specified consumer should b e taken into consideration.  
4.2 Specific requirements  
4.2.1 General  
The properties of knitted upholstery shall conform to all of the specification requirements in Table 1.  
 
 
 DUS 949-2: 2020  
© UNBS 2020  – All rights reserved  3 
 Table 1 — Specification requirements  
Characteristics  Specifications  Test meth ods  
Dimensional change:   
Wale or course;  
• Shrinkage  
• Elongation     
 
5.0 % max  
2.0 % max    
  
ISO 5077  
Breaking  strength  222 N  ISO 13934 -2  
Tongue tear strength  
• Tricot knit only  
• Other knits    
45 N min  
22 N min   
ISO 13937 -3  
Resistance to yarn  slippage (seam integrity)  111 N min  ISO 13936 -1  
Colour fastness to;  
• Water (colour change)  
• Organic solvent (colour change)  
• Burnt gas fumes – 2 cycles  
• Light    
• Rubbing   
Dry   
Wet     
4  
4  
4  
4  
 
4  
3   
ISO 105 -E01  
ISO 105 -X05  
ISO 105 -G02  
ISO 10 5-B02  
  
ISO 105 -X12  
ISO 105 -X12  
Surface abrasion (double rubs), min.  
• Light duty (3000 cycles ) 
• Medium duty (9000 cycles ) 
• Heavy duty (15000 cycles )  
No noticeable wear   
  
    
ISO 12947 -1 
ISO 12947 - 2 
4.2.2  Flammability requirement  
4.2.2 .1 ISO 6941 Test method shall be used to evaluate flammability properties. In case a manufacturer 
claims an alternative method, the manufacturer shall demonstrate that such a method is technically equivalent 
or better to the one specified.  
4.2.2 .2 When tested in accordance  with ISO 6941, the average time to sever the upper trip thread for all 
specimens shall not be less than 20 s.  
NOTE  Except where specified that testing after an approved cleansing or wetting procedure is unnecessary, all 
samples for flammability test shoul d be subjected to the appropriate procedure specified in ISO 10528 or ISO 12138 as 
appropriate. It is unnecessary to test such samples before the cleansing procedure.  
5 Labelling  
Each roll of fabric shall have a label securely attached in such a way that i t can be retained with the roll 
indicating the following information. For fabrics supplied against a certain pattern, the information shall be 
available with the pattern:  
a) name and address of the manufacturer or distributor or other means of identification;   
4 © UNB S 2020  – All rights reserved  
 b) fibre content of the fabric;  
c) dimensions or size (length and width);  
d) lot number or batch number  
e) care instructions  
f) country of origin; and  
g) any other marking as the contract or order may direct.  
6 Assessment of compliance  
6.1 Lot 
6.1.1  The quantity of uphol stery fabrics of the same type and quality delivered to one buyer against one 
dispatch note shall constitute a lot.  
6.1.2  The conformity of the lot to the requirements of the standards shall be determined on the basis of 
tests carried out on the samples se lected from the lot.  
6.1.3 Unless otherwise agreed upon between the buyer and the manufacturer, the number of pieces to be 
selected at random from a lot shall be in accordance with Table 2.  
Table 2 — Sample size  
Number of pieces in a lot  Sample size (num ber of pieces to 
be selected)  Sub-sample (test samples)  
Up to 100  10  5  
101 to 300  15  6  
301to 500  25  7  
501 to 800  35  8  
801 to 1300  50  9  
1301 and above   75  10  
6.2 Test specimens  
Where not prescribed in the relevant test method ind icated against each characteristic in Table 1, the test 
specimens shall be taken at points as widely dispersed as possible throughout the available test samples .  
6.3 Criteria of compliance   
The lot shall be declared as conforming to specification for vari ous characteristics referred in Table 1 and 
4.2.2, if for each of the characteristics, the mean values of the test results on all the individual specimens are 
found to be within limits of the specification. Failing of a sample on account of any of the char acteristics shall 
mean rejection of the full lot . 
 DUS 949-2: 2020  
© UNBS 2020  – All rights reserved  5 
 Bibliography  
ASTM D4771M -19, Standard Performance Specification for Knitted Upholstery Fabrics for Indoor Furniture   
 DUS 949-2: 2020  
© UNBS 2020  – All rights reserved  7 
 Certification marking  
Products that conform to Uganda standards may be marked with U ganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark is governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the ce rtification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard. The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements  of that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Uganda National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further  particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 949-2: 2020    
 
ICS 97.140 
Price based on nn pages  
© UNBS 2020– All rights reserved   
  