DRAFT UGANDA STANDARD  
  DUS 202-2 
Third  Edition  
2015-04-dd 
 
 
 Reference number  
DUS 202-2: 2015 
© UNBS 2015  
  
Flexible Polyurethane Foam — Part 2: Mattresses  — 
Specification  
 DUS 202-2: 2015 
ii © UNBS 2015 – 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 contract. Users are 
responsible for its correct application  
© UNBS 200 7  
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 and 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 4 505 995  
Fax: 256 41 4 286 123  
E-mail: unbs@infocom.co.ug  
Web: www.unbs.go.ug  DUS 202-2:2015 
© UNBS 2015 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  2 
4 Mattress Types  ................................ ................................ ................................ ................................ ...... 2 
5  Requirements  ................................ ................................ ................................ ................................ .........  3 
5.1 Ticking Materials  ................................ ................................ ................................ ................................ ... 3 
5.1.1  General requirements  ................................ ................................ ................................ ...........................  3 
5.1.2  Constructional requirements for ticking material  ................................ ................................ ..............  3 
5.2  Foam for mattresses  ................................ ................................ ................................ .............................  4 
5.3. Classes of foam  ................................ ................................ ................................ ................................ ..... 4 
5.4 Dimensions  ................................ ................................ ................................ ................................ ............  4 
5.5 Fillings and quilting fo ams ................................ ................................ ................................ ...................  6 
5.5.1  Type 1 mattress  ................................ ................................ ................................ ................................ ..... 6 
5.5.2  Type 2 mattress  ................................ ................................ ................................ ................................ ..... 6 
5.5.3  Type  3 mattress  ................................ ................................ ................................ ................................ ..... 6 
5.5.4  Type 4 mattress  ................................ ................................ ................................ ................................ ..... 6 
5.5.5  Type 5 mattress  ................................ ................................ ................................ ................................ ..... 7 
5.6 Foam used for quilting  ................................ ................................ ................................ ..........................  7 
5.7 Adhesion of mattress filling contacting parts  ................................ ................................ ....................  7 
5.8 Finish  ................................ ................................ ................................ ................................ ......................  7 
5.9  Packaging and labelling ................................ ................................ ................................ ........................  7 
5.9.1  Packaging  ................................ ................................ ................................ ................................ ...............  7 
5.9.2  Labelling  ................................ ................................ ................................ ................................ .................  8 
5.9.2.1  For ticking  ................................ ................................ ................................ ................................ ..............  8 
5.9.2.3  Additional marking for type 2 and type 4 mattresses  ................................ ................................ ........  8 
6  Samplin g ................................ ................................ ................................ ................................ ................  8 
Bibliography  ................................ ................................ ................................ ................................ ......................  10 
 DUS 202-2: 2015 
iv © UNBS 2015 – All rights reserved  
 Foreword  
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Tourism, Trade and 
Industry established under Cap  327, of the Laws of Uganda.  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/SPS Agreements 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 a rea and consists of representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders.  
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.  
Committee membership  
 
 DRAFT UGANDA STANDARD  DUS 202-2: 2015 
 
© UNBS 2015– All rights reserved  1 
 Flexible Polyurethane Foam  — Part 2: Mattresses  — 
Specification  
1 Scope  
This draft Ugandan standard specifies  requirements, methods of sampling and  testing of foam mattresses  
suitable for domestic and hotel use . 
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.  
FDUS 202 -1 Flexible polyurethane foams, Part 1: polyether type – Specifications  
FDUS 202 -3 Flexibl e polyurethane foams, Part 3: Reconstituted foams – Specifications  
FDUS 202 -4 Flexible polyurethane foams, Part 4: polyester type – Specifications  
FDUS ISO 105 B01 Textiles -- Tests for colour fastness -- Part B01: Colour fastness to light: Daylight  
FDUS I SO 105 B02 Textiles -- Tests for colour fastness -- Part B02: Colour fastness to artificial light: Xenon 
arc fading lamp test  
FDUS ISO 105 C10 Textiles -- Tests for colour fastness -- Part C10: Colour fastness to washing with soap or 
soap and soda  
FDUS ISO  105 X12 Textiles -- Tests for colour fastness -- Part X12: Colour fastness to rubbing  
FDUS ISO 105 -DO1 Textiles -- Tests for colour fastness -- Part D01: Colour fastness to drycleaning using 
perchloroethylene solvent  
FDUS ISO 3071 Textiles -- Determinatio n of pH of aqueous extract  
US EAS 238, Method for determination of colour fastness of textile materials to perspiration  
US EAS 242, Dimensional changes of fabric by cold water immersion  
US ISO 13938 -1 Textiles -- Bursting properties of fabrics -- Part 1:  Hydraulic method for determination of 
bursting strength and bursting distension  
US ISO 13938 -2 Textiles -- Bursting properties of fabrics -- Part 2: Pneumatic method for determination of 
bursting strength and bursting distension  
US ISO 3801:1977 : Textiles  -- Woven fabrics -- Determination of mass per unit length and mass per unit area  
 DUS 202-2: 2015 
2 © UNBS 2015 – All rights reserved  
 3 Terms and definitions  
For the purposes of this standard, the following terms and definitions shall apply  
3.1  
foam  
polyurethane foam  
3.2 
objectionable  
objectionable to t he parties concluding the purchase contract, but in relation to a certification mark and  to 
inspections carried out, objectionable to the recognized certification body  
3.3 
warp  
yarns/threads lying lengthways in a fabric as woven  
3.4 
weft 
yarns/threads lyin g widthways in a fabric as woven (at right angles to the warp)  
3.5 
ticking  
outermost layer of fabric or related material of a  mattress or foundation  
3.6  
filling  
Inert substance introduced to a product to achieve desired characteristics  
3.7 
quilt  
bedcove r of two thicknesses with padding sewn into compartments  
4 Mattress Types  
Mattresses shall be one of the following types, as required  
a) type 1 (S) mattress, the foam interior of which consists of a single type of polyurethane foam;  
b) type 2 (FS) mattress, the  foam interior of which is divided into two parts to give the user a firm or a 
soft sleeping surface option;  
c) type 3 (RS) mattress, the foam interior of which consists of two identical polyurethane foam parts 
placed above and below a reconstituted foam part ; 
d) type 4 (RFS) mattress, the foam interior of which gives the user a firm or a soft sleeping surface  
option together with a reconstituted foam centre part; and  
e) type 5 (M) mattress, the foam interior of which is a multiple combination of foams of design  differing 
from those given for types 1 to 4 (inclusive).  DUS 202-2: 201 5 
© UNBS 2015 – All rights reserved  3 
 5  Requirements  
5.1 Ticking Materials  
5.1.1  General  requirement s 
The ticking or covering materials shall be new, clean and free from defects (including splits, tears and voids) 
that detract from the a ppearance or that may be detrimental to the performance of the mattress.  The ticking 
shall also comply with the following requirements  
a) the ticking shall show  no evidence of holes, tears, loose yarns, spots or odour;  
b) the stitching shall not pucker or have open seams, or loose or untrimmed ends;  
c) The fibre composition of the thread used for stitching the fabric on the mattress shall be the same as 
that of  the fabric.  
d) The covering material for the mattresses shall be cotton or blended and cott on shall not be  less than 
50%. 
e) Chemicals which are harmful to the skin or which can react with the rubber foam shall not be used in 
the finishing of the fabric. The pH of the finished fabric shall be between 6.0 — 8.5, when tested in 
accordance  with FDUS ISO 3071 . 
f) The fa bric width for all sizes of mattresses shall be such that when stitched, not more than three 
seams shall be on one side of the width of the mattress. The width of the fabric roll shall be as 
declared subject to a tolerance of ± 2 %.  
5.1.2  Constructional requirements for ti cking material  
When tested in accordance with the test methods indicated in Table 1, the t icking material shall conform to the 
limits specified therein.  
Table 1 — Quality requirements for the tacking material  
Parameter  Requirement  Test method  
 Pure Cotton  Cotton - Other fibre Blends   
Dimensional change s, %, 
max.  
warp  
weft   
 
4 
4  
 
 
2 
2 US EAS 242  
Mass per unit area, g/m2 
(min) 230 120 US ISO 3801  
Breaking strength (N) min  
weft  
warp  
900 
475  
450 
450 FDUS ISO 13934 -1 
Bursting streng th kN/m2, 
knitted fabrics .min  157 160 US ISO 13938 -1/ US ISO 
13938 -2  DUS 202-2: 2015 
4 © UNBS 2015 – All rights reserved  
 5.1.2.2  colour fastness requirements of ticking material  
When tested in accordance with the test methods indicated in Table 2, the t icking material  (dyed and/or printed 
fabric ) shall conform to the  colour fastness requirements given in  Table 2. 
Table 2: Colour fastness requirements  
Parameter  Numerical Rating  Test method  
Change in colour, min  Staining, min  
light (min)  4 4 FDUS ISO 105 B01/  US 
FDUS ISO 105 B02  
 
Washing    4 4 FDUS ISO 105 C10  
Dry cleaning  4 4 FDUS ISO 105 -D01 
Rubbing  
Dry 
wet  
4  
4 FDUS ISO 105 X12  
3 3 
Perspiration  (acid and alkali)  4 4 US EAS 238  
 
5.2  Foam for mattresses  
5.2.1 Flexible polyurethane foam for the mattresses may be supplied in block, sheet  or strip form 
depending on the manufacturing conditions and shall meet the requirements of the appropriate grade and 
class given in US 202 -1 and/or US 202 -4 as appropriate.  
5.2.2 . The foam may contain fillers. Fillers shall be a maximum of 20% and shall b e indicated as filler 
added under clause 5.9.2. 2 
5.2.3   Type 1 foam mattress core shall be one piece, with no cemented sections, no breaks or cracks along 
edges and shall have square corners or rounded with a radius maximum 5cm.  
5.2.4  Repaired or correct ed material  shall be considered to comply with this standard if the foam used in 
such repairs or corrections is of the same composition and quality as the original product and provided that 
such corrections do not adversely affect performance or alter the size and shape.  
5.2.5  When components are repaired, corrected or fabricated, any adhesive used shall be such as to be 
non-injurious to the foam and the resulting bonds shall be at least as strong as the foam itself.  
5.3. Classes of foam  
The classes of f oam used for making mattresses shall be one of th ose specified in US 202 -1 and/or US 202 -4 
and shall comply with the requirements so specified.   
5.4 Dimensions  
5.4.1  Type 1 mattresses shall be of the dimensions  given in table 3. 
5.4.2  Other types of matt resses shall be of dimensions given in table 3 or as given in table 4 provided they 
meet additional dimension requirements given in clause 5.5. DUS 202-2: 201 5 
© UNBS 2015 – All rights reserved  5 
 5.4.3.  Mattresses of dimensions other than those indicated under  tables 3 and 4 should be manufactured 
subject t o tender agreement between purchaser and supplier. They shall be for purchasers’ use only  and shall 
not be sold in the market.   
Table 3: Dimensional Requirements of Type 1 Mattress es 
Length, mm  Width, mm  Thickness, mm  
1880  762 51 
1880  762 76 
1880  762 102 
1880  915 51 
1880  915 76 
1880  915 102 
1880  915 152 
1880  1069  102 
1880  1069  152 
1880  1219  102 
1880  1219  152 
1880  1372  152 
1880  1524  152 
1880  1829  152 
Tolerances shall be as follows:  
length: + 25 mm,  width: +10 mm, thickness: +10mm  
 
Table 4:  Dimensional Requirements for other types of Mattresses  
Length, mm  Width, mm  Thickness, mm  
1880  762 152 
1880  915 152 
1880  1069  152 
1880  1372  152 
1880  1524  152 
1880  1830  152 
2000  915 152 
2000  1069  152 
2000  1069  152 
2000  1219  152 
2000  1219  152 
2000 1372  152 
Tolerances shall be as follows:  
length: + 15 mm,  width: +10 mm, thickness: +10mm  DUS 202-2: 2015 
6 © UNBS 2015 – All rights reserved  
  
5.5 Fillings and quilting foams  
5.5.1 Type 1 mattress  
A filling for a type 1 mattress shall consist of foam complying with at least requirements corresponding t o class 
No. 20, grade 12 of US 202 -1, without correction or repair. A layer of convoluted foam filling may be used to 
form the top (or sleeping) surface(s) and the quality of this foam shall be not less than class No. 20, grade 12 
of US 202 -1.The mattresse s shall have both sides similar in appearance and shall be usable on either side. 
The surface shall be smooth and shall not sag.  
5.5.2 Type 2 mattress  
5.5.2.1 General  
A filling for a type 2 mattress shall consist of an upper and a lower filling part. The i nterface surfaces between 
the upper and lower filling parts may be contoured, provided that the minimum thicknesses given in table 4 are 
maintained. A layer of convoluted foam filling may be used to form the top (or sleeping) surface(s) and the 
quality of this foam shall be not less than class No. 26, grade 12 of US 202 -1. 
5.5.2.2 Lower part  
The lower filling part shall be of a foam of a quality not less than class No. 26, grade 16 of US 202 -1 and of 
thickness not less than 90 mm.  
5.5.2.3 Upper part  
The upp er filling part shall be of a foam of a quality not less than class No. 26, grade 12 of US 202 -1 and of 
thickness not less than 50 mm (38 mm at the shallowest point in the case of a contoured mattress).  
5.5.3 Type 3 mattress  
5.5.3.1 General  
A filling for a  type 3 mattress shall consist of two identical foam parts placed above and below a reconstituted 
foam part (centre). A layer of convoluted foam filling may be used in the construction of the upper and lower 
filling parts to form the top (sleeping) surface s and the quality of this foam shall be not less than class No. 26, 
grade 12 of US 202 -1. 
5.5.3.2 Upper and lower filling parts  
The upper and lower filling parts shall be of a foam of a quality not less than class No. 26, grade 12 of US 
202-1 and of thickn ess not less than 25 mm.  
5.5.3.3 Centre part  
The centre filling part shall be of a reconstituted foam of a quality not less than class No. 64, nominal 
hardness factor 19 of US 202 -3, and of thickness not less than 75 mm.  
5.5.4 Type 4 mattress  
5.5.4.1 Gener al 
A filling for a type 4 mattress shall consist of three foam parts:  DUS 202-2: 201 5 
© UNBS 2015 – All rights reserved  7 
 a) a soft part providing one sleeping surface;  
b) a firm part providing a second (alternative) sleeping surface; and  
c) a centre part being of reconstituted foam.  
A layer of convoluted foam filli ng may be used in the construction of the soft and firm parts to form the  top 
(sleeping) surfaces and the quality of this foam shall be not less than class No. 26, grade 12 of  US 202 -1. 
5.5.4.2 Soft filling part  
The soft filling part shall be of a foam of a quality not less than class No. 26, grade 12 of US 202 -1 and of 
thickness not less than 25 mm.  
5.5.4.3 Firm filling part  
The firm filling part shall be of a foam of a quality not less than class No. 26, grade 16 of US 202 -1 and of 
thickness not less than  25 mm.  
5.5.4.4  Centre part  
The centre filling part shall be of a reconstituted foam of a quality not less than class 64, nominal  hardness 
factor 19 of US 202 -3 and of thickness not less than 75 mm.  
 
5.5.5 Type 5 mattress  
A filling for a type 5 mattress s hall consist of a combination of foams, provided that any foam used shall have 
a quality not less than:  
a) class 26 of US 202 -1 for polyurethane foam; and  
b) class 64, nominal hardness factor 19 of US 202 -3 for reconstituted foams.  
5.6 Foam used for quilting  
Foam or similar materials used for quilting shall be of minimum thickness 10 mm.  
5.7 Adhesion of mattress filling contacting parts  
Contacting surfaces of mattress filling parts shall be uniformly and acceptably adhered to one another. The 
adhering edges shall  not have any un -adhered length exceeding 10 mm.  
5.8 Finish  
All outer surfaces of the mattress shall be smooth and free from defects, including splits and tears that  might 
affect appearance, normal life or serviceability . The mattress shall be clean in app earance, without any 
objectionable odour. All sewing shall be securely and neatly finished off. For taped edged mattresses, borders 
shall be straight and neatly finished.  
5.9  Packaging and labelling  
5.9.1  Packaging  
5.9.1.1  The foam  mattresses  shall b e covered in clothing  (ticking)  complying with requirements given in 
clause 5.1.2. or any other suitable material as agreed between the purchaser and supplier . To avoid 
deterioration of foam mattresses during storage, it shall be kept in well -ventilated roo ms otherwise away from 
direct sunlight  DUS 202-2: 2015 
8 © UNBS 2015 – All rights reserved  
 5.9.1.2  Mattresses shall be individually wrapped in sealed polyethylene bags or any other suitable material 
that are strong enough to prevent any damage to the contents during storage and transportation.  
5.9.1.3 Durin g dispatch mattresses  shall be packed and transported in manner to minimize damage due to 
rough or improper handling.  
5.9.2  Labelling  
5.9.2.1 For ticking  
The following shall appear in legible and indelible marking on a strong, durable label that is firm ly sewn to the 
outside of the ticking  or on the ticking of the mattress.  
a)  Name and physical address of the manufacturer/ importer/ distributor and/ or trade mark if any  
b) dimensions of the mattress  
c) class and grade  
d) Country of origin  
5.9.2.2  For Foam  
The follo wing shall appear in legible and indelible marking  on an end or on a sleeping surface near an end  of 
the foam of the mattress and shall be visible  to the purchaser.  
a) manufacturer/ importer/ distributor and/ or trade mark if any  
b) lot or batch number;  
c) dimensio ns of the mattress  
d)  type designated; appropriately designated by the letters S, FS, RS, RFS or M. (see clause 4)  
e) class and grade  
f) percent of fillers added  
g) country of origin  
5.9.2.3  Additional marking for type 2 and type 4 mattresses  
A type 2 or a type 4 ma ttress shall have information indicating which sleeping surface provides a soft  or a firm 
support, printed prominently in legible and indelible block letter s (of height at least 30 mm) on a strong, 
durable label that is firmly sewn to the ticking of the sl eeping surfaces.  
6  Sampling  
To test the compliance of the foam mattresses to the requirements of this standard, samples shall be taken 
according to the sampling plan given in Table 5.  
Table 5 ― Sampling plan  
Number of mattresses in the lot Number of samp les to be selected (n)  
2 – 8 2 DUS 202-2: 201 5 
© UNBS 2015 – All rights reserved  9 
 9 – 15 3 
16 – 25 5 
26 – 50 8 
51 – 90 13 
91 – 150 20 
 
 
 
 
 DUS 202-2: 2015 
10 © UNBS 2015 – All rights reserved  
 Bibliography  
[1]  KS 03 -376: 1982, Specification for flexible polyurethane foam  
[2]  TZS 360: 1989, Domestic Mattresses ― Flexible polyurethane foam ― Specific ation  
[3]  ISO 5999, Polymeric materials, cellular flexible -polyurethane foam  
[4]  US 202 EAS 7:2006 Flexible polyurethane foam mattresses― Specification  
[5]  SANS 642 Reconstituted flexible polyurethane foams  
[6]  KS 376 -1:2005 Flexible  polyurethane (pol yether) foams — Specification Part 1:  Mattresses  
[7]  SANS 1291 -2:2005 Flexible polyurethane foam sleeping mats and mattresses, Part 2: Foam 
mattresses for domestic and hotel use  
[8]  SANS 1401 -10: 2007 Woven cotton and similar household fabrics and articl es Part 10: Cotton ticking  
[9]  KS 597: 2013 Mattress covers — Specification  
 
. DUS 202-2: 201 5 
© UNBS 2015– All rights reserved  11 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda 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 certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjuncti on 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, Uga nda 
National Bureau of Standards.  
 
 DUS 202-2: 2015   
 
ICS nn.nnn.nn  
Price based on nn pages  
© UNBS 2015– All rights reserved