QB/T 4839-2015 English PDF (QBT4839-2015)
QB/T 4839-2015 English PDF (QBT4839-2015)
QB/T 4839-2015: Upholstered furniture. Foam mattress
LIGHT INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
Classification number. Y 81
Registration number. 51136-2015
Upholstered furniture - Foam mattress
ISSUED ON. JULY 14, 2015
IMPLEMENTED ON. JANUARY 01, 2016
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions, code ... 5
4 Product classification ... 6
5 Requirements ... 6
6 Test methods ... 9
7 Inspection rules ... 12
8 Marking, instructions for use, packaging, transport and storage ... 14 Upholstered furniture - Foam mattress
This standard specifies the terms and definitions, code, product classification, requirements, test methods, inspection rules, markings, instructions for use, packaging, transportation and storage of upholstered furniture foam mattress. This standard is applicable to foam mattresses with a thickness of 130 mm and above, the foam mattresses with a thickness of less than 130 mm can make reference to this standard.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.
GB/T 212-2008 Proximate analysis of coal
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1. Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 3920-2008 Textiles - Tests for color fastness - Color fastness to rubbing GB 5296.6 Instructions for use of products of consumer interest - Part 6. furniture
GB/T 6344-2008 Flexible cellular polymeric materials - Determination of tensile strength and elongation at break
GB/T 6670-2008 Flexible cellular polymeric materials - Determination of resilience by ball rebound
GB/T 9640 Flexible and rigid cellular polymeric materials - Accelerated ageing tests
GB/T 10807-2006 Flexible cellular polymeric materials - Determination of hardness (indentation technique)
GB 15979-2002 Hygienic standard for disposable sanitary products
a This requirement is only applicable to the arbitration testing.
b When China has issued and implemented the National Standard for Limits of Hazardous Substances in Upholstered Furniture Mattresses, the requirements and test methods for hazardous substances in foam mattresses shall comply with the provisions of national standards. 6 Test methods
6.1 General test conditions
6.1.1 Test preparation
Before the test, the specimen shall be placed under the standard environment of temperature (23 ± 2) °C and relative humidity (50 ± 5)% for at least for 24 hours. During the period of the balance, the mattress shall be kept flat and unloaded. The test shall be carried out indoors.
In the test, it may use a suitable method to prevent the movement of the mattress, such as the use of stoppers, tapes and pins. If the hardness of the mattress can be adjusted, the hardness of the mattress in the test shall be recorded in the test report.
If the product instructions clearly indicate that the mattress is not consistent in hardness, it shall use two mattresses of the same model and test on the soft and hard surfaces of the mattress, respectively.
6.1.2 Measurement accuracy
Unless otherwise specified, the force measurement shall be accurate to 5%; the mass measurement shall be accurate to ±0.5%; the size measurement shall be accurate to ±1 mm; the position of the load pad shall be accurate to ±5 mm. 6.1.3 Ground
The ground of the test shall be rigid, level and flat.
6.2 Test device
The device used to prevent the movement of the test piece, but does not limit the tipping of the test piece, is not more than 12 mm in height. If the test piece has a special structure, a higher size can be used, but the maximum height shall be just to prevent the movement of the test piece.
The slab is used to measure the outer dimensions of the mattress. The
2) °C and relative humidity (50 ± 5)% to a constant mass and then make
weighing (m0). Place it in an oven at the temperature of (105 ± 2) °C to age it for 48 h, weigh the mass (m1), calculate the mass loss.
Mass loss = (m0 - m1)/m0 × 100%
6.11 Ash content
It is tested in accordance with the method A of GB/T 212-2008.
6.12 Recovery time
It is tested in accordance with the provisions of Appendix A of GB/T 24451-2009. The number of samples is 3.
6.13 Indentation hardness and aging change rate
The aging test is carried out in accordance with the provisions of 7.2 Method A of GB/T 10807-2006, and the rate of change after aging is calculated.
6.14 Pathogenic bacteria
Pathogenic bacteria such as G. brevis, Staphylococcus aureus and hemolytic streptococcus are tested in accordance with GB 15979-2002.
6.15 Formaldehyde release
The test shall be carried out in accordance with clause 6.12 of QB/T 1952.2- 2011. The sampling shall include the mattress as a whole (bedding material and core material).
6.16 Flame retardancy
The evaluation of the flame-retardant properties of household foam mattresses shall be carried out in accordance with the provisions of GB 17927.1; the evaluation of the flame-retardant properties of foam mattresses for public places shall be carried out in accordance with the provisions of GB 17927.2. 6.17 Mite suppression performance
It is performed in accordance with clause 6.11 of QB/T 1952.2-2011.
6.18 Diisocyanate monomer
It is performed in accordance with GB/T 18446-2009.
It is performed in accordance with clause 6.15 of QB/T 1952.2-2011.
220.127.116.11 The basic items of the single product are all qualified, and if the number of general item unqualified item is not more than 3, the product is a qualified product, otherwise it is a disqualified product.
18.104.22.168 For the evaluation of batch products, in accordance with the number of samples taken as specified in Table 4, if the number of disqualified products is less than or equal to the number of accepted products (Ac), this batch of products is qualified batch; if the number of disqualified products is greater than or equal to the number of rejected products (Re), the batch of products is rated as disqualified batch.
7.3 Type inspection
7.3.1 Type inspection item
All inspection items specified in clause 5 (except for arbitration items). 7.3.2 Timing of type inspection
Type inspection shall be carried out in one of the following cases.
a) Trial-type identification of new product or old products after trans-plant production;
b) After formal production, if there are major changes in structure, materials and processes that may affect product performance;
c) During normal production, after a certain amount of production is
accumulated regularly or periodically, one inspection shall be carried out periodically, and the inspection period is generally 1 year;
d) In case of production restoration after long-term suspension of the product; e) When the exit-factory inspection result is significantly different from the last type inspection;
f) When the national quality supervision agency proposes to carry out type inspection requirements.
7.3.3 Sampling rules
In one inspection cycle, 2 pieces (sets) of samples are randomly selected from recently produced products, 1 piece (set) is sent for inspection, and 1 piece (set) is retained.
7.3.4 Inspection procedures
The inspection procedure shall follow the principle of minimizing the impact on the correctness of the remaining inspection items.