Detail of GB/T 44438-2024

Introduction of GB/T 44438-2024

GB/T 44438-2024 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 (excluding water mattresses and air mattresses). This document does not apply to 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.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 Hs 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, as a result of the durability test Note: The unit is millimeters (mm). 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: This product is not intended to be used separately. 4 General test conditions 4.1 Preliminary preparation All conditioning shall be carried out in a standardised climate of (23 ± 2) °C and (50 ± 5) % relative humidity (RH). 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. 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.

Contents of GB/T 44438-2024