1、BRITISH STANDARD BS 5866-2: 1991 Blankets suitable for use in the public sector Part 2: Specification for cotton leno cellular blanketsBS5866-2:1991 This British Standard, having been prepared under the directionof the Textiles and Clothing Standards Policy Committee, was published under the authori
2、ty of the Standards Board and comes into effect on 30August1991 BSI 08-1999 First published October 1980 Second edition August 1991 The following BSI references relate to the work on this standard: Committee reference TCM/1 Draft for comment90/41065DC ISBN 0 580 19669 0 Committees responsible for th
3、is British Standard The preparation of this British Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/1, upon which the following bodies were represented: Blanket Manufacturers Association British Textile Confederation Chemical Industri
4、es Association Confederation of British Wool Textiles Limited Department of Health International Wool Secretariat Local Authority Organizations Ministry of Defence Textile Research Council (FCRA) Amendments issued since publication Amd. No. Date CommentsBS5866-2:1991 BSI 08-1999 i Contents Page Comm
5、ittees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Materials 1 4 Manufacture 1 5 Make-up 1 6 Dimensions 1 7 Physical properties 2 8 Flammability 2 9 Conditioning and testing atmosphere 2 10 Colour fastness and fluidity 2 11 Assessment of compliance 2 12 Marking 2 Appendix
6、A Methods of test 3 Table 1 Physical properties 1 Table 2 Dimensions 2 Table 3 Colour fastness of dyed blankets 2 Publication(s) referred to Inside back coverBS5866-2:1991 ii BSI 08-1999 Foreword This revision of BS5866-2has been prepared under the direction of the Textiles and Clothing Standards Po
7、licy Committee and supersedes BS5866-2:1980which is withdrawn. This edition introduces certain technical changes necessary in view of the publication of Part4of this standard. BS 5866 specifies requirements for a range of blanket types suitable for use in the public sector and is published in four P
8、arts as follows: Part 1: Specification for wool and wool/polyamide blankets; Part 2: Specification for cotton leno cellular blankets; Part 3: Specification for synthetic fibre cellular blankets; Part 4: Specification for flammability performance. In this Part, requirements are specified for cotton l
9、eno cellular blankets including colour fastness requirements for dyed blankets. The principal change introduced by this edition is that flammability performance, where required, has been included. BS5866 covers only the basic description of the products and their construction and performance require
10、ments. Purchasing authorities therefore may need to include additional information. Many properties cannot be specified objectively and cannot therefore be included in this standard. Examples of such properties include colour, handle, appearance and details of additional design features. Public sect
11、or purchasing authorities may be able to supply standard patterns which cover these properties and thereby serve to resolve any ambiguities of description. Appendix A gives methods of test. A British Standard does not purport to include all the necessary provisions of a contract. Users of British St
12、andards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. In particular, attention is drawn to Statutory Instrument1986No. 26, the Textile Products (Indications of Fibre Content) Regulations1986. Summary of pa
13、ges This document comprises a front cover, an inside front cover, pages i and ii, pages1to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS
14、5866-2:1991 BSI 08-1999 1 1 Scope This Part of BS5866specifies requirements for the materials, manufacture, make-up, dimensions, physical properties and colour fastness of cotton leno cellular blankets suitable for use in the public sector. Requirements for both adults and childrens blankets are spe
15、cified. NOTEThe titles of the publications referred to in this Part of this British Standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS5866, the definitions given in BS6189apply. 3 Materials Cellular blankets shall be made wholly from cotton, with a staple
16、 length of not less than2.5cm. 4 Manufacture 4.1 Yarn The same type of yarn shall be used for both warp and weft and shall be2-fold, with singles and folding twist factors as stated in Table 1. NOTEYarns should be uniformly spun. 4.2 Weaves The body part of the blanket shall be woven in a five and t
17、wo leno weave. Along each side of the blanket there shall be a tucking strip, woven plain weave, of width shown in Table 1. 4.3 Number of threads per10 cm The number of threads per10cm shall be as specified in Table 1. 4.4 Selvedges Selvedges shall be not less than1cm wide containing12ends of the ya
18、rn as used in the cloth with two ends weaving as one. NOTESelvedges should be firm and straight. 4.5 Finishing The blankets shall be supplied either scoured only, or bleached, or dyed, or bleached and dyed. Bleached, dyed and bleached and dyed blankets shall also comply with the appropriate requirem
19、ents of clause10. NOTEThe blankets should contain no size or filling. 5 Make-up The ends of the blakets shall be finished with2cm hems in accordance with seam type6.03.08, as classified in BS3870-2. Hems shall be sewn using stitch type301, as classified in BS3870-1, with a stitch length not greater
20、than0.32cm. The sewing thread shall be polyester and cotton core spun, with polyester core and cotton sheath, of linear density38tex. 6 Dimensions The dimensions of the cellular blankets shall be as given in Table 2 when determined as described in BS5129. NOTEBS5129gives a range of recommended dimen
21、sions for blankets not specifically intended for use in the public sector. Table 1 Physical properties Property Adults blankets Childrens blankets Method of test Twist factor (max.) singles Z folding S 4100 3200 4100 3200 A.1 Threads per 10 cm leno warp plain warp weft 40 4 51 4 51 4 40 4 51 4 51 4
22、A.2 Mass (min.) scoured only blanket bleached and/or dyed blanket 1.35 kg 1.27 kg 0.85 kg 0.80 kg A.4 Breaking strength (min.) warp 20 threads weft 26 threads 350 N 450 N 350 N 450 N A.5 Dimensional change on washing (max.) warp weft 4% 4% 4% 4% A.6BS5866-2:1991 2 BSI 08-1999 Table 2 Dimensions (see
23、 A.3) Table 3 Colour fastness of dyed blankets (minimum rating) 7 Physical properties Mass, breaking strength and dimensional change on washing shall be as given in Table 1. 8 Flammability Where flammability performance is specified, blankets shall comply with Part 4of this British Standard. 9 Condi
24、tioning and testing atmosphere Blankets shall be conditioned and tested in the standard temperate atmosphere for testing as defined in BS1051,i.e. at a relative humidity of65 2 % and a temperature of20 2 C. 10 Colour fastness and fluidity For colour fastness, dyed blankets shall comply with Table 3.
25、 The cuprammonium fluidity of bleached only and bleached and dyed blankets shall be not more than6units as determined according to BS2610. 11 Assessment of compliance 11.1 Selection of test samples 11.1.1 Inspection lot and test sample A sampling scheme equivalent to at least one in every3000blanket
26、s shall be used. 11.1.2 Test specimens The test specimens shall be taken at points as widely dispersed as possible throughout the available test samples and no two specimens used for the determination of a particular property shall contain the same warp or weft threads. 11.2 Criteria of compliance I
27、f any test sample complies with all the requirements of clauses3 to10, the inspection lot from which it was drawn shall be deemed to comply with the requirements of this Part of BS5688. If one specimen in the test sample fails to comply with any of the requirements, further testing shall be carried
28、out (see note). NOTEInterested parties may agree on how the further testing is to be carried out, in the case of one specimen failing to comply with any of the requirements. 12 Marking Blankets shall be supplied with the following information,e.g. on a label or swing ticket or on an accompanying inv
29、oice or other document: a) the manufacturers name, trademark or other means of identification; b) the number and date of this British Standard, i.e. BS5866-2:1991 1) ; c) any other marking as the contract or order may direct. Where flammability requirements are specified, blankets shall be marked wi
30、th details in accordance with BS5866-4. Blanket category Width (including tucking strip) Length Width of tucking strip (min.) cm cm cm Adults blanket Childrens blanket 180 3 % 145 3 % 230 3 % 185 3 % 23 3 Agency Requirements Method of test Light 5 BS 1006-B02:1990 Washing Change in colour 4 staining
31、 4 BS 1006-C04:1990 Bleaching Change in colour 4 BS 1006-N01:1990 1) Marking BS5866-2:1991on or in relation to a product represents a manufacturers declaration of conformity,i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the
32、claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS5866-2:1991 BSI 08-1999 3 Appendix A Methods of test A.1 Twist factor Determine the linear density and twi
33、st as described in BS2010and BS2085 respectively. For the purposes of this Part of BS5688, calculate the twist factor as twist factor = (turns/metre)(linear density) “ A.2 Threads per 10cm Lay the blanket, or a full width portion not less than1m long, on a flat horizontal surface and place on it, at
34、 right angles to the threads to be counted, a steel rule graduated in millimetres. Measure the width of the strip to the nearest millimetre and count the number of threads. Calculate the number of threads per10cm. Take the mean of not less than three determinations, over different groups of threads,
35、 for each direction. A.3 Dimensions of blanket Spread the blanket out flat on a level surface. Use a steel rule graduated in millimetres for making the measurements. Measure both the length and width of the blanket in three places as follows: a) for measurement of length, one measurement in the cent
36、re of the blanket and the other two halfway between the centre and the inner edges of the tucking strips; b) for measurement of width, one measurement in the centre of the blanket and the other two halfway between the centre and the ends of the blanket. No movement of the blanket should take place b
37、etween the measurement of the length and the measurement of the width. Take the mean of the three measurements for length and width respectively. A.4 Determination of mass of blanket Condition the blanket by freely exposing it to the standard temperate atmosphere for testing as defined in BS1051, i.
38、e at a relative humidity of65 2 % and a temperature of20 2 C, for at least 5h. Determine the mass to within 0.5 %. A.5 Determination of breaking strength Use the method described in BS2576but, owing to the nature of this particular fabric construction, fray down the specimen to20threads for tests in
39、 the warp direction and26threads for tests in the weft direction, regardless of the resultant specimen width. A.6 Dimensional change on washing Take from the leno portion a specimen in accordance with BS4931and overlock the edges to prevent fraying. Follow the procedure described in procedure1A of B
40、S4923, except that the washing temperature shall be 71 3 C, then tumble dry using procedure E of BS4923. Repeat this procedure twice. Determine the total dimensional change occurring as a result of the three cycles.4 blankBS5866-2:1991 BSI 08-1999 Publication(s) referred to BS 1006, Methods of test
41、for colour fastness of textiles and leather. BS 1051, Glossary of terms relating to the conditioning, testing and mass determination of textiles. BS 2010, Method for determination of the linear density of yarns from packages. BS 2085, Method of test for determination of twist in yarns, direct counti
42、ng method. BS 2576, Method for determination of breaking strength and elongation (strip method) of woven fabrics. BS 2610, Method of test for the determination of the cuprammonium fluidity of cotton and certain cellulosic man-made fibres. BS 3870, Stitches and seams. BS 3870-1, Classification and te
43、rminology of stitch types. BS 3870-2, Classification and terminology of seam types. BS 4923, Method for individual domestic washing and drying for use in textile testing. BS 4931, Methods for preparation, marking and measuring of textile fabrics, garments and fabrics assemblies in tests for assessin
44、g dimensional change. BS 5129, Specification for dimensions for of bed blankets. BS 5866, Blankets suitable for use in the public sector. BS 5866-4, Specification for flammability performance. BS 6189, Glossary of terms relating to fabrics and associated fibres, yarns and processes. BS 5866-2: 1991
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