ISO 23769:2021

INTERNATIONAL ISO
STANDARD 23769
First edition
2021-11
Furniture — Mattresses — Test
methods for the determination of
functional characteristics
Ameublement — Matelas — Méthodes d’essai pour la détermination
des caractéristiques fonctionnelles
Reference number
© ISO 2021
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General test conditions .2
4.1 Preliminary preparation . 2
4.2 Tolerances . 2
5 Test apparatus .2
5.1 Standard test bed base for mattresses . 2
5.2 Side support profile . 2
5.3 Standard table/test board (measuring) . 3
5.4 Loading pad . 3
5.5 Equipment for recording the load/deflection curves . 4
5.6 Equipment for the durability test . 5
5.7 Edge loading pad . 5
6 Test procedure .5
6.1 General . 5
6.2 Durability of mattress surface . 6
6.3 Durability of mattress edge . 6
7 Functional characteristics . 7
7.1 General . 7
7.2 Preload . 7
7.3 Load/deflection curve . 7
7.4 Determination of height loss . 8
7.5 Determination of hardness value . 8
7.6 Determination of firmness rating . 9
8 Test report .10
Annex A (normative) Edge loading pad data .11
Annex B (informative) Impact test .13
iii
Foreword
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iv
Introduction
This document does not give any product requirements. Where no requirements document is available
the desired functional characteristics should be determined by the specifier.
v
INTERNATIONAL STANDARD ISO 23769:2021(E)
Furniture — Mattresses — Test methods for the
determination of functional characteristics
1 Scope
This document specifies test methods for the determination of the durability, height loss and hardness
of mattresses with a height ≥100 mm (and mattress pads when they form a unit with the mattress).
This document applies to adult mattresses for domestic and non-domestic use. It does not apply to
water mattresses, air mattresses or standalone mattress pads.
Test methods for the assessment of aging, degradation, fire resistance and electrical functions are not
included.
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.
EN 1334, Domestic furniture — Beds and mattresses — Methods of measurement and recommended
tolerances
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
load curve
deflection curve
curves that are obtained by pressing a load pad into the mattress and measuring the associated value of
indentation and force simultaneously
3.2
hardness value
H
determined from load/deflection measurement, in N/mm
3.3
firmness rating
H
s
number (1 decimal) on a scale from 1 to 10 which expresses the firmness of a mattress
3.4
height loss
change in the height of a mattress, in mm, as a result of the durability test
3.5
mattress pad
product, comprising a cover and filling(s), or filling material(s) alone, used in conjunction with a
mattress or upholstered bed base
Note 1 to entry: This product is not intended to be used separately.
4 General test conditions
4.1 Preliminary preparation
The tests shall be carried out in indoor ambient conditions at a temperature between 15 °C and 25 °C. If
during a test the temperature is outside of the range of 15 °C to 25 °C, the maximum and/or minimum
temperature shall be recorded in the test report.
All conditioning shall be carried out in a standardised climate of (23 ± 2) °C and (50 ± 5) % relative
humidity (RH).
During conditioning and handling, mattresses shall be kept flat and unloaded.
If a test cannot be carried out as specified, e.g. because a loading pad cannot be used for the application
of a force due to the design of product, the test shall be carried out as far as possible as specified.
If necessary, mattress pads shall be prevented from moving during testing by a suitable means, e.g.
adhesive tape or pins.
If the product information states that the mattress has a soft side and a firm side, both sides shall be
tested using separate mattresses.
4.2 Tolerances
Unless otherwise stated the following tolerance are applicable to the test equipment:
a) all forces shall have an accuracy of ±5 % of the nominal force;
b) all masses an accuracy of ±0,5 % of the nominal mass;
c) all dimensions less than 200 mm shall have an accuracy of ±1 mm of the nominal dimension; the
other dimensions shall have an accuracy of ±0,5 %;
d) the tolerance for position of loading pads shall be ±5 mm;
e) the tolerance for measuring point shall be ±20 mm.
NOTE For the purposes of uncertainty measurement, test results are not considered to be adversely affected
when the above tolerances are met.
5 Test apparatus
5.1 Standard test bed base for mattresses
Rigid, horizontal, flat and smooth.
5.2 Side support profile
The mattress shall be prevented from moving during durability test by two side support profiles as
illustrated in Figure 1. The internal distance between the supports (W ) shall be equal to the width
s
of the mattress measured according to EN 1334, ±10 mm. The height of the support profiles (h) shall
not exceed one third of the mattress thickness (H), measured according to EN 1334. The length of the
support profiles shall be at least equal to the length of the test unit.
Key
1 standard test bed base 4 side support profile
2 side support profiles 5 mattress
3 roller 6 enlargement of side support profiles (2)
H height of mattress h height of support profiles
W distance between supports
s
Figure 1 — Side support profile
5.3 Standard table/test board (measuring)
Horizontal, flat and smooth surface, large enough to fully support the mattress in any measuring
position. At the loading position, the deflection shall not exceed 1 mm under 1 000 N load. The overall
flatness tolerance of the test board shall be 2 mm/1 000 mm.
5.4 Loading pad
Rigid circular object 355 mm in diameter the face of which has a convex spherical curvature of
(800 ± 20) mm radius with a 20 mm front edge radius (see Figure 2).
The loading pad shall have a smooth surface and shall be mounted to the loading system of the test
machine (5.5) by a ball joint as close as possible to the indenter surface (see Figure 2).
Dimensions in millimetres
F
...