Reference number  
DRS 378-2: 2017  
© RSB 2017  
 
 
 RWANDA 
STANDARD  DRS 
378-2 
 
first edition  
2017 -mm-dd 
 
Flexible polyurethane foam for mattresses 
— Specification — Part 2: Mattresses  
 
  DRS 378-2: 2017  
©RSB 2017 - All rights reserved                  ii 
 In order to match with technological development and to keep continuous progress in industries, 
standards are subject to periodic review. Users shall ascertain that they are in possession of the latest 
edition  
 
 
 
 
 
 
 
 
© RSB 2017  
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized 
in any form or by any means, electronic or mechanical, including photocopying and microfilm, without 
prior written permission from R SB. 
Requests for permission to reprodu ce this document should be addressed to : 
Rwanda Standards  Board  
P.O Box 7099 Kigali -Rwanda  
KK 15 Rd, 49  
Tel. +250 252 586103/ 582945  
Toll Free: 3250  
E-mail: info@rsb.gov.rw  
Website: www.rsb.gov.rw  DRS 378-2: 2017 
iii                ©RSB 2017 - All rights reserved  
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Requirements  ................................ ................................ ................................ ................................ .........  1 
4.1 Types  ................................ ................................ ................................ ................................ ......................  1 
4.2 Fillings and quilting foams  ................................ ................................ ................................ ...................  2 
4.2.1  Type 3 mattress  ................................ ................................ ................................ ................................ ..... 2 
4.2.2  Type 4 mattress  ................................ ................................ ................................ ................................ ..... 2 
4.2.3  Type 5 mattress  ................................ ................................ ................................ ................................ ..... 2 
4.2.4  Type 6 mattress  ................................ ................................ ................................ ................................ ..... 3 
4.2.5  Type 7 mattress  ................................ ................................ ................................ ................................ ..... 3 
4.3 Foam used for quilting  ................................ ................................ ................................ ..........................  4 
4.4 Adhesion of mattress filling contacting parts  ................................ ................................ ....................  4 
4.5 Finish  ................................ ................................ ................................ ................................ ......................  4 
4.6 Materials  ................................ ................................ ................................ ................................ .................  4 
4.6.1  Cores ................................ ................................ ................................ ................................ .......................  4 
4.6.2  Classes of f oam ................................ ................................ ................................ ................................ ..... 4 
4.7 Dimensions of core  ................................ ................................ ................................ ...............................  5 
4.7.1  Thickness  ................................ ................................ ................................ ................................ ...............  5 
4.7.2  Nominal length and width  ................................ ................................ ................................ .....................  5 
4.7.3  Actual length and width  ................................ ................................ ................................ ........................  5 
5 Packaging and marking  ................................ ................................ ................................ ........................  5 
5.1 Packaging  ................................ ................................ ................................ ................................ ...............  5 
5.2 Marking  ................................ ................................ ................................ ................................ ...................  5 
5.2.1  Additional marking of type 2 and type 4 mattresses  ................................ ................................ .........  6 
5.2.2  Bulk containers  ................................ ................................ ................................ ................................ ...... 6 
6 Sampling and compliance with Part 1 of the specification  ................................ ...............................  6 
6.1 Sampling  ................................ ................................ ................................ ................................ ................  6 
 DRS 378-2: 2017  
©RSB 2017 - All rights reserved                  iv 
 Foreword  
Rwanda  Standard s are prepared  by Technical Committees and approved by R wanda Standards Board (RSB) 
Board  of Directors in  accordance with the procedures of RSB, in compliance with Annex 3 of the WTO/TBT 
agreement on the preparation, adoption and application of st andards.  
The main task of technical committees is to prepare national standards.  Final Draft Rwanda S tandards 
adopted by Technical committ ees are ratified  by me mbers of RSB Board of Director s for publication and 
gazettment as Rwanda Standards.  
DRS 378-2 was prepared by Technical Committee RSB/TC 024, Chemicals and Consumer products ,  
In the preparation of this standard, reference was made to the following standard:  
EAS 7 -2 Flexible polyurethane foam for mattresses — Specification — Part 2: Mattresses  
The assistance de rived from the above source is hereby acknowledged with thanks.  
DRS 378 consists of the following parts, under the general title:  
DRS 378-2 Flexible polyurethane foam for mattresses — Specification — Part 1: General requirements  
DRS 378-2 Flexible polyurethane foam for mattresses — Specification — Part 2: Mattresses   
DRS 378-2 Flexible polyurethane foam for mattresses — Specification — Part 3: Reconstituted flexible 
polyurethane foam  
Committee membership  
The following organizations were represented on the Technical Committee on Chemicals and consumer 
products (RSB/TC 024) in the preparation of this standard.  
Paragraph of p articipants  
Rwanda  Standards Board  (RSB) – Secretariat  
 
 DRS 378-2: 2017  
1                ©RSB 2017 - All rights reserved  
 Flexible polyurethane foam for mattresses — Specification — 
Part 2: Mattresses  
1 Scope  
This Part 2 of this Draft Rwanda  Standard covers seven types of flexible polyurethane foam sleeping mattresses 
intended for use in homes, hotels and similar applications.  
2 Normative references  
The following documents are referred to in the text in such a way that some or all of their content 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.  
DRS 378 -1, Flexible polyurethane foam f or mattresses — Specification — Part 1: General requirements  
DRS 378 -3, Flexible polyurethane foam for mattresses — Specification — Part 3: Reconstituted flexible 
polyurethane foam  
3 Terms and definitions  
For the purposes of this standard, the definitions in  EAS 7 -1 shall apply.  
4 Requirements  
4.1 Types  
A sleeping mattress shall be of one of the following types:  
a) Type 1 — A sleeping mattress having a flexible polyether foam core;  
b) Type 2 — A sleeping mattress having a reconstituted foam core;  
c) Type 3 — (S) mattress, t he foam interior of which consists of a single type of polyurethane foam;  
d) Type 4 — (FS) mattress, the foam interior of which is divided into two parts to give the user a firm or soft 
sleeping surface option;  
e) Type 5 — (RS) mattress, the foam interior of which consists of two identical polyurethane foam parts placed 
above and below reconstituted foam;  
f) Type 6 — (RFS) mattress, the foam interior of which gives the user a firm or soft sleeping surface option 
together with a reconstituted foam centre part;   
©RSB 2017 - All rights reserved                  2 
 g) Type 7 — (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).  
4.2 Fillings and quilting foams  
4.2.1  Type 3 mattress  
A filling for a type 3 mattress shall consist of foam complyi ng with class No. 26, grade 12 of EAS 7 -1 without 
correction or repair. A layer of convoluted foam filling shall 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 EAS 7 -1. 
4.2.2  Type 4 mattress  
4.2.2.1  General  
A filling for a type 4 mattress shall consist of an upper and a lower filling part. The interface surfaces between the 
upper and lower filling parts shall be contoured, provided the minimum thickness given in Table 2 is maintained. A 
layer  of convoluted foam filling shall 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 EAS 7 -1. 
4.2.2.2  Lower part  
The lower filling part shall be of a foam of a quality not less than class No. 26, grade 16 of EAS 7 -1 and of thickness 
not less than 90 mm.  
4.2.2.3   Upper part  
The upper filling part shall be of a foam of a quality not less than class No. 26, grade 12 of EAS 7 -1 and of thickness 
not less than 50 mm (38 mm at the lowest point in the case  of a contoured mattress).  
4.2.3  Type 5 mattress  
4.2.3.1  General  
A filling for a type 5 mattress shall consist of two identical foam parts placed above and below a reconstituted foam 
part (centre). A layer of convoluted foam filling shall 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 EAS 
7-1. 
4.2.3.2  Upper and lower filling parts  
The upper and lower filling parts shall be of a foam of a quality n ot less than class No. 26, grade 12 of EAS 7 -1 and 
of thickness not less than 25 mm.  
 DRS 378-2: 2017  
3                ©RSB 2017 - All rights reserved  
 4.2.3.3  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 EAS 7 -3, and of thickness not less than 75 mm.  
4.2.4  Type 6 mattress  
4.2.4.1  General  
A filling for a type 6 mattress shall consist of three foam parts:  
a) soft part providing one sleeping surface;  
b) firm part providing a second (alternative) sleeping surface(s);  
c) centre part being of reconstituted foam.  
A layer of convoluted foam filling may be used in the construction of the soft and firm 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 EAS 7 -1. 
4.2.4.2  Soft filling part  
The soft filling pa rt shall be of a foam of a quality not less than class No. 26, grade 12 of EAS 7 -1 and of thickness not less 
than 25 mm.  
4.2.4.3  Firm filling part  
The firm filling part shall be of foam of a quality not less than class No. 26, grade 16 of EAS 7 -1 and of thickness not less 
than 25 mm.  
4.2.4.4  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 
EAS 7 -3 and of thickness not less than 75 mm.  
4.2.5  Type 7 mattress  
A filling for a type 7 mattress shall  consist of a combination of foams provided that any foam used shall have a quality not 
less than  
a) class 26 of EAS 7 -1 for polyurethane foam; and  
b) class 64, nominal hardness factor 19 of EAS 7 -3 for reconstituted foams.  
  
©RSB 2017 - All rights reserved                  4 
 4.3 Foam used for quilting  
Foam used for quilting of thickness 4 mm or greater shall be a foam of various grades meeting quality requirements 
specified in EAS 7 -1. 
4.4 Adhesion of mattress filling contacting parts  
Contacting surfaces of mattress filling parts shall be uniformly and acce ptably adhered to one another. The adhering 
edges shall not have any single unadhered length exceeding 100 mm.  
4.5 Finish  
All outer surfaces of the mattress shall be smooth and free from defects, including splits and tears. The mattress shall be 
clean in appearance, without any objectionable odour. All sewing shall be securely and neatly finished off.  
4.6 Materials   
4.6.1  Cores  
The core of a sleeping mat or mattress shall comply with the following requirements:  
a) Type 1 — The core shall comply with the requirements fo r class No 23, Grade 12 of EAS 7 -1; 
b) Type 2 — The core shall comply with all the requirements for class No. 56 of EAS 7 -3 and the nominal value of the 
hardness factor shall be 10;  
c) Types 3, 4, 5, 6 and 7 — The core shall comply with all the requirements for class No. 26, Grade 12 of EAS 7 -1; 
4.6.2  Classes of foam  
The classes of foam shall be one of the following:  
a) Classes 17 and 20 — These two classes of foam are for use in light duty (L) mattresses;  
b) Class 23, 26 — This class of foam is for use in medium duty (A) matt resses;  
c) Class 30 — This class of foam is for use in heavy -duty mattresses;  
d) Class 36 — This class of foam is for use in mattresses (V) subjected to severe stress under normal usage.  
 
 DRS 378-2: 2017  
5                ©RSB 2017 - All rights reserved  
 4.7 Dimensions of core  
4.7.1  Thickness  
Minimum thickness shall be 30 mm.  
4.7.2  Nominal length and width  
The nominal length and width of the core of a sleeping mattress shall be as specified.  
4.7.3  Actual length and width  
The actual length and width, measured in accordance with EAS 7 -1 shall not differ from the nominal values by more than 
the appropriate tolerances as given in Table 1.  
Table 1 — Tolerances on length and width  
Magnitude of dimension * D, 
mm Tolerance and width  
(1) (2) 
301 < D ≤  600  -0 + 12.5  
601< D ≤ 1000  -0 +20  
1001 D ≤ 1500  -0 +30 
1501 < D ≤ 2000  0 + 4 0  
D > 2000  -0 +45 
*Length or width, as relevant.  
 
5 Packaging and marking  
5.1 Packaging  
5.1.1  Mattresses shall be so packed that they are adequately protected during normal transportation and storage  
5.1.2  Mattresses shall be individually wrapped in sealed polyethylene bags that are strong enough to prevent any 
damage, gross distortion and nicking to contents during storage and transportation.  
5.2 Marking  
The following information shall appear in legible and indelible marking on a strong durable label that is firmly sewn 
to the o utside of the ticking of each mattress:  
a) name, postal and physical address of manufacturer;   
©RSB 2017 - All rights reserved                  6 
 b) lot or batch number;  
c) dimensions;  
d) density class of foam;  
e) Country of origin.  
5.2.1  Additional marking of type 2 and type 4 mattresses  
A type 2 or a type 4 mattress shall hav e information indicating which sleeping surface provides a soft or firm support, 
printed prominently in legible and indelible block letters (of height at least 30 mm) on a strong, durable label that is 
firmly sewn to the ticking of the sleeping surfaces.  
5.2.2  Bulk containers  
The following information shall be given in legible and durable marking on each bulk container or on a label securely 
attached to the container:  
a) information specified in 5.2 a), b), and c);  
b) quantity of mattresses;  
c) any additional information  specified by the purchaser.  
6 Sampling and compliance with Part 1 of the specification  
NOTE  This section applies to the sampling for inspection and testing before acceptance or rejection of single lots (consignments) in 
cases where no information about the implementation of quality control or testing during manufacture is available to help in assessing the 
quality of the lot. It is also used as the procedure for adjudicating in cases of dispute.  
6.1 Sampling  
Representative samples shall be taken randomly from th e factory, market or elsewhere and tested for 
compliance with the standard.  
 DRS 378-2: 2017  
7                ©RSB 2017 - All rights reserved  
 Bibliography  
[1] ISO/IEC Directives, Part  2, Rules for the structure and drafting of International Standards , 2016  
  
 DRS 378-2: 2017  
ICS 97.140 
 
 
©RSB 2017  - All right s reserved