This document specifies the main dimensions and deviations, external symmetry, product materials and processing, appearance performance, physical and chemical properties, mechanical properties, safety performance, and other requirements for sofas. It describes the corresponding test methods, specifies inspection rules, markings, instructions for use, packaging, transportation, and storage, and provides product classification for technical regulations.
This document is applicable to the production, grading, inspection, and sale of sofas for indoor use.
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.
GB/T 1732 Determination of impact resistance of film
GB/T 3324-2017 General technical requirements for wooden furniture
GB/T 3920 Textiles - Tests for colour fastness - Colour fastness to rubbing
GB/T 3922 Textiles - Tests for colour fastness - Colour fastness to perspiration
GB/T 4802.2-2008 Textiles - Determination of fabric propensity to surface fuzzing and to pilling - Part 2: Modified Martindale method
GB/T 4893.4 Test of surface coatings of furniture - Part 4: Determination of adhesion - Cross cut
GB/T 4893.7 Test of surface coatings of furniture - Part 7: Determination of surface resistance to alternation of heat and cold
GB/T 4893.8 Test of surface coatings of furniture - Part 8: Determination of wearability
GB/T 4893.9 Test of surface coatings of furniture - Part 9: Determination of resistance to impact
GB/T 5296.6 Instructions for use of products of consumer interest - Part 6: furniture
GB/T 6343 Cellular plastics and rubbers - Determination of apparent density
GB/T 6669 Flexible cellular polymeric materials - Determination of compression set
GB/T 6670 Flexible cellular polymeric materials - Determination of resilience by ball rebound
GB 6675.4 Safety of toys - Part 4: Migration of certain elements
GB/T 6739 Paints and varnishes - Determination of film hardness by pencil test
GB/T 7573 Textiles - Determination of pH of aqueous extract
GB/T 9286 Paints and varnishes - Cross cut test for films
GB 17927.1 Upholstered furniture - Assessment of the resistance to ignition of mattress and sofa - Part 1: Smouldering cigarette
GB 17927.2 Upholstered furniture - Assessment of the resistance to ignition of mattress and sofa - Part 2: Match flame equivalent
GB/T 19817-2005 Textiles - Fabrics for furnishings
GB 20286-2006 Requirements and mark on burning behavior of fire retarding products and subassemblies in public place
GB/T 21196.2 Textiles - Determination of the abrasion resistance of fabrics by the Martindale method - Part 2: Determination of specimen breakdown
GB 28007-2011 General technical requirements for children's furniture
GB/T 28202-2020 Furniture industry terminology
GB/T 29894 General method of wood identification
GB/T 30695-2014 Identification of polyvinyl chloride and polyurethane imitation leather
GB/T 31106 Determination of volatile organic compounds in furniture
GB/T 31107 Environmental chamber for the determination of volatile organic compounds of furniture - General technical requirements
GB/T 38408-2019 Leather - Identification - Method of microscopy
GB/T 38733-2020 Office furniture - Office chairs - Methods for the determination of dimensions
QB/T 39452 Leather - Physical and mechanical tests - Tests for adhesion of finish
GB/T 40904 Methods for the determination of prohibited substances in furniture products and related materials - Azo dyes
GB/T 40908 Methods for the determination of prohibited substances in furniture products and related materials - Flame retardants
QB/T 1646-2007 Polyurethane synthetic leather
QB/T 2385 Valuable hardwood furniture in deep color
QB/T 2537 Leather - Tests for colour fastness - Colour fastness to cycles of to-and-fro rubbing
QB/T 2724 Leather - Chemical tests - Determination of pH
QB/T 2726 Leather - Physical and mechanical tests - Determination of abrasion resistance
QB/T 3826 Corrosion-resistant testing method of the metal deposits and conversion coatings for the light industrial products - Neutral salt spray (NSS) test
ISO 16000-3:2011 Indoor air - Part 3: Determination of formaldehyde and other carbonyl compounds in indoor air and test chamber air - Active sampling method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 28202-2020 and the following apply.
3.1
leather
raw leather with a roughly intact natural fiber structure, which is tanned into a non-perishable material
[Source: GB/T 38408-2019, 3.1]
3.2
imitation leather
collective term for synthetic animal leather substitutes consisting of a coating and a fabric substrate
Note: This includes artificial leather and synthetic leather, but does not include laminated leather with animal leather as base material.
[Source: GB/T 30695-2014, 3.1, modified]
3.3
artificial leather sofa; synthetic leather sofa
sofa whose main exterior (except the bottom of the seat surface) is covered with artificial leather (3.2)
3.4
leather sofa
sofa covered with natural animal leather, recycled leather (3.12) and artificial leather (3.2) on the exterior of the product (except the bottom of the seat surface)
3.5
the front width of seat
B
widest part on the inner side of the seat surface of the armrest of the sofa, or the widest part on the front edge of the seat surface if there is no armrest
Note: The unit is mm.
3.6
depth of seat
T
distance from the center point of the front edge of the sofa seat to the center point of the intersection between the front edge of the seat and the back
Note: The unit is mm.
3.7
the front height of seat
H1
vertical distance from the center point of the front edge of the sofa seat to the ground
Note: The unit is mm.
3.8
height of back
H2
vertical distance from the center point of the back of the sofa to the ground
Note: The unit is mm.
3.9
chair measuring device; CMD
device used to measure the size of a chair
[Source: GB/T 38733-2020, 3.1]
4 Product classification
4.1 Classified by the wrapping material of the product:
a) Leather sofa;
b) Artificial leather sofa;
c) Fabric sofa;
d) Fabric and leather sofa.
4.2 Classified by product usage function:
a) Ordinary sofa: A sofa that only has the function of seating;
b) Functional sofa: In addition to the function of a seat, it also has other functions such as a bed.
Contents Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Product classification 5 Requirements 6 Test methods 7 Inspection rules 8 Marking, instructions for use, packaging, transportation and storage Annex A (Normative) Equilibrium moisture content of woods in different areas of China Annex B (Normative) Mechanical property test Annex C (Normative) Determination of formaldehyde, benzene, toluene, xylene and TVOC Annex D (Normative) Measurement method for exposed area of upholstered furniture Bibliography
