1、BRITISH STANDARD BS 4723:2002 Stretch covers for upholstered furniture Specification ICS 97.140 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS 4723:2002 This British Standard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy
2、 Committee, was published under the authority of the Standards Policy and Strategy Committee on 5 March 2002 BSI 5 March 2002 First published March 1971 Second edition October 1978 Third edition December 1990 Fourth edition March 2002 The following BSI references relate to the work on this British S
3、tandard: Committee reference TCI/72 Draft for comment 01/120864 DC ISBN 0 580 39121 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee TCI/72, Furnishing fabrics, upon which the following bodies were represented: Associati
4、on of Consulting Scientists British Interior Textiles Association British Shops and Stores Association Confederation of British Wool Textiles Ltd. Furniture Industry Research Association Qualitas Furnishing Standards Ltd. Royal Society for the Encouragement of Art SATRA Technology Centre Society of
5、Dyers and Colourists Amendments issued since publication Amd. No. Date CommentsBS 4723:2002 BSI 5 March 2002 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative references 1 3T e r m s a n d d e f i n i t i o n s 1 4 Fabrics 1 5M a k e - u p 3 6M a r k i n
6、g 3 Annex A (normative) Method for determination of change in area on washing 4 Annex B (normative) Method for determination of stretch and recovery 4 Table 1 Fabric properties 2 Table 2 Colour fastness (minimum ratings) 2BS 4723:2002 ii BSI 5 March 2002 Foreword This British Standard has been prepa
7、red by Technical Committee TCI/72, Furnishing fabrics. It supersedes BS 4723:1990, which is withdrawn. The first edition of the standard, published in 1971, applied only to stretch covers made of nylon but the scope has since been widened to include any fabric of any fibre type. As a consequence of
8、the publication of the Consumer Protection, The Furniture and Furnishings (Fire) (Safety) Regulations 1988 1) , and the Consumer Protection, The Furniture and Furnishings (Fire) (Safety) (Amendment) Regulations 1989 2) , changes were made in the previous edition to the stretch and recovery requireme
9、nts for fabric. This new edition does not introduce any technical changes but as several standards have been superseded by European Standards, the opportunity has been taken to update the references and to present the standard in current editorial style. A British Standard does not purport to includ
10、e all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Attention is drawn to the above Statutory Instruments and to the Trade Descriptions, T
11、he Textile Products (Indications of Fibre Content) Regulations 1986 3) . Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document
12、 was last issued. 1) Consumer Protection, The Furniture and Furnishings (Fire) (Safety) Regulations 1988. SI 1988 No. 1324. Available from The Stationery Office, London. 2) Consumer Protection, The Furniture and Furnishings (Fire) (Safety) (Amendment) Regulations 1989. SI 1989 No. 2358. Available fr
13、om The Stationery Office, London. 3) Trade Descriptions, The Textile Products (Indications of Fibre Content) Regulations 1986. SI 1986 No. 26. Available from The Stationery Office, London.BS 4723:2002 BSI 5 March 2002 1 1 Scope This British Standard specifies make-up and performance requirements for
14、 cleanable stretch covers, made from knitted fabrics, for domestic upholstered furniture. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to, or revi
15、sions of, any of these publications do not apply. For undated references, the latest edition of the publication referred to applies. BS 1903, Glossary of terms used by the clothing industry. BS 2471:1978, Methods of test for textiles Woven fabrics Determination of mass per unit length and mass per u
16、nit area. BS 3084, Specification for slide fasteners. BS 3870-1:1991, Stitches and seams Part 1: Classification and terminology of stitch types. BS 4952:1992, Methods of test for elastic fabrics. BS 7271, Specification for touch and close fasteners. BS EN 20105-A02, Textiles Tests for colour fastnes
17、s Part A02: Grey scale for assessing change in colour. BS EN 23758, Textiles Care labelling code using symbols. BS EN 25077, Textiles Determination of dimensional change in washing and drying. BS EN ISO 105-B02, Textiles Tests for colour fastness Part B02: Colour fastness to artificial light: Xenon
18、arc fading lamp test. BS EN ISO 105-C06:1997, Textiles Tests for colour fastness Part C06: Colour fastness to domestic and commercial laundering. BS EN ISO 105-D01, Textiles Tests for colour fastness Part D01: Colour fastness to dry cleaning. BS EN ISO 105-E01, Textiles Tests for colour fastness Par
19、t E01: Colour fastness to water. BS EN ISO 105-X12, Textiles Tests for colour fastness Part X12: Colour fastness to rubbing. BS EN ISO 6330, Textiles Domestic washing and drying procedures for textile testing. BS EN ISO 12947-2, Textiles Determination of the abrasion resistance of fabrics by the Mar
20、tindale method Part 2: Determination of specimen breakdown. 3 Terms and definitions For the purposes of this British Standard, the terms and definitions given in BS 1903 apply. 4 Fabrics Fabrics shall be knitted and their properties shall be as given in Table 1 and Table 2.BS 4723:2002 2 BSI 5 March
21、 2002 Table 1 Fabric properties Table 2 Colour fastness (minimum ratings) Property to be assessed Compliance requirements Test procedure Minimum mass per unit area (g/m 2 ) 120 Method 3 of BS 2471:1978 Abrasion resistance Minimum cycles to breakdown of three threads 20 000 BS EN ISO 12947-2 using a
22、pressure of 12 0.3 kPa Minimum cycles to change in colour not lower than grade 3 6 000 Assessed using the grey scale for assessing change in colour in BS 20105-A02 Maximum dimensional change on washing (%) (machine direction and cross direction) +5 BS EN 25077, using the relevant washing and drying
23、procedures given in BS EN ISO 6330, taking into account the information given on care of the fabric (see clause 6) Maximum change in area on washing (%) 10 Annex A Stretch and recovery (%) (machine direction and cross direction) Annex B Minimum extension 15 Maximum residual extension after 30 min 7
24、Agency Test procedure Requirement Water BS EN ISO 105-E01 Change in colour: 34 Staining: 34 Dry-cleaning a BS EN ISO 105-D01 Change in colour: 4 Staining: 4 Light BS EN ISO 105-B02 Change in colour: 5 Rubbing BS EN ISO 105-X12 Staining Dry: 34 Wet: 3 Washing Test B2S of BS EN ISO 105-C06:1997 Change
25、 in colour: 4 Staining: 4 a Taking into account any information given on the care of the fabric (see clause 6).BS 4723:2002 BSI 5 March 2002 3 5 Make-up 5.1 Sewing threads Sewing threads shall have a minimum linear density of 156 dtex 4)and a minimum tenacity of 45 cN/tex. Their colour fastness shal
26、l be as given in Table 2. NOTE The sewing needle should be of a suitable type and size so as to avoid damage to the fabric, e.g. small ball-point. 5.2 Stitching Stitch types 504, 512 or 514 of BS 3870-1:1991 shall be used and there shall be not fewer than four stitches per centimetre. 5.3 Seams Seam
27、s shall have a minimum bight of 5 mm. 5.4 Trimming and securing means NOTE In the case of a cover made for a chair or similar unit, the made-up cover should be capable of being adequately secured to the furniture. Possible methods are by looping crossover tape or by using elasticated edges. The colo
28、ur fastness of elastic braids, piping cords, tapes and other trimmings and means of securing, shall be as given in Table 2 except that, where trimmings and means of securing are intended to be concealed during normal usage, only the staining requirements given in Table 2 shall apply. When used, slid
29、e fasteners shall conform to BS 3084 and touch and close fasteners shall conform to BS 7271. 6 Marking The stretch cover shall bear a label marked with the following particulars: a) the name, trade mark or other means of identification of the manufacturer; b) the number and date of this British Stan
30、dard, i.e. BS 4723:2002 5) ; c) instructions or any precautions to be taken concerning care, including cleaning, using the relevant care labelling symbol conforming to BS EN 23758. The label shall be securely attached to the cover, i.e. it cannot be removed without causing damage to the label or the
31、 cover. NOTE The following warnings may also be given either on a label attached to the cover or on leaflets supplied with the cover. “If this article is accidentally snagged, any loop should not be cut but should be pulled through to the back of the fabric.” “Particular care should be taken to avoi
32、d contact with lighted cigarettes or hot cigarette ash as this may cause a hole to form in the fabric.” 4) 1 tex = 10 6 kg/m. 5) Marking BS 4723:2002 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim on or on behalf of the manufacturer that the product
33、 meets the requirements of the standard. The accuracy of the claim is solely the claimants responsibility. Such a declaration is not to be confused with third-party certification of conformity.BS 4723:2002 4 BSI 5 March 2002 Annex A (normative) Method for determination of change in area on washing C
34、arry out the test in accordance with BS EN 25077, using the relevant washing and drying procedures given in BS EN ISO 6330 and taking into account the information given on care of the fabric. Calculate for each specimen the percentage change in area as given by the following equation. Calculate the
35、mean percentage change in area and express it to the nearest 1 %. Indicate whether the area has decreased (shrinkage) by means of a minus sign () or increased (expansion) by means of a plus sign (+). Annex B (normative) Method for determination of stretch and recovery Carry out the test in accordanc
36、e with section 2 of BS 4952:1992 for straight specimens cycling between zero extension and 30 N and record the maximum extension on the second cycle and the residual extension after 30 min relaxation. NOTE For fabrics which extend by more than 100 % under a load of 30 N on the second cycle, cycle be
37、tween the limits of zero and 100 % extension and record the uncovered extension. Percentage change in area final length final width original length original width 100 original length original width - - =blankBS 4723:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI
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