1、BRITISH STANDARD BS 5455:1977 Specification for Polyurethane coated nylon fabric for mattress covers UDC 677.494.675.06:678.664.026.3:645.476BS5455:1977 This British Standard, having been prepared under the directionof the Fibres, Yarns andFabrics Standards Committee, was published underthe authorit
2、y of the Executive Board on 28February1977 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference FBT/13 Draft for comment 73/70673 ISBN 0 580 09621 1 Cooperating organizations The Fibres, Yarns and Fabrics Standards Committee, under whose supervision this
3、British Standard was prepared, consists of representatives from the following Government departments and industrial organizations: Association of Jute Spinners and Manufacturers* British Man-Made Fibres Federation* British Railways Board* British Textile Employers Association* Central Council of the
4、 Irish Linen Industry Department of Industry* Knitting Industries Federation Manchester Chamber of Commerce Ministry of Defence* Narrow Fabrics Federation Retail Trading Standards Association Inc. Textile Institute Warp Knitters Association Wool Textile Delegation The Government departments and indu
5、strial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: British Plastics Federation British Reinforcement Textiles Association British Resin Manufacturers Associat
6、ion British Rubber Manufacturers Association Central Electricity Generating Board Clothing Institute Department of Health and Social Security Furnishing Fabrics Association Ltd Furniture Industry Research Association Home Office Industrial Safety Protective Equipment Manufacturing Association Leathe
7、rcloth and Coated Fabric Manufacturers Association London Transport Executive Post Office Rubber and Plastics Research Association Shoe and Allied Trades Research Association Society of Motor Manufacturers and Traders Ltd. Textile Research Council Amendments issued since publication Amd. No. Date of
8、 issue CommentsBS5455:1977 BSI 09-1999 i Contents Page Cooperating organizations Inside front cover Foreword ii 1 Scope 1 2 References 1 3 Marking 1 4 Number of cuts in the roll 1 5 Standard pattern 1 6 Material 1 Appendix A Sterilization and disinfection procedures approved by the Department of Hea
9、lth and Social Security 3 Appendix B Tests 3 Table 1 Physical requirements 2 Table 2 Colour fastness requirements 2 Publications referred to Inside back coverBS5455:1977 ii BSI 09-1999 Foreword This British Standard is based on specification TSS/S/310, 029 D of the Department of Health and Social Se
10、curity, who requested its conversion into a British Standard. Particulars for the making up of mattress covers using the fabric specified in this standard are given in BS5223-4. However, whilst fabric conforming to the requirements of this standard meets the needs of the Department of Health and Soc
11、ial Security for the National Health Service, the use of the fabric as a mattress cover material by other users need not be excluded. This standard does not include requirements for flammability. The reason is that taking account of other bedding items used (i.e.mattress, sheets, blankets and counte
12、rpane) that represent the fuel load, research has shown that a mattress cover made from flame retardant fabric does not reduce the hazard nor is there at the present time an inherently flame retardant material which meets the other requirements of this standard. A British Standard does not purport t
13、o include 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. Summary of pages This document comprises a front cover, an inside front cover,
14、 pagesi andii, pages1 to4, 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.BS5455:1977 BSI 09-1999 1 1 Scope This British Standard specifies re
15、quirements for a polyurethane coated nylon fabric to be used in the manufacture of mattress covers. 2 References The titles of the publications referred to in this standard are listed on the inside back cover. 3 Marking Each roll of coated fabric shall have a label attached bearing the following inf
16、ormation. a) The name and/or distinctive marks of the manufacturer. b) The number of this British Standard, i.e.BS5455. 4 Number of cuts in the roll A roll of coated fabric complying with the requirements of this standard may contain cuts. If the roll consists of more than one piece or length, the n
17、umber of pieces and the minimum length of each piece of the material shall be as agreed between the purchaser and the supplier. 5 Standard pattern A standard pattern, when obtainable from the purchasing authority, shall constitute the standard for any properties not defined in this specification. 6
18、Material The base fabric shall be manufactured from continuous filament, flat (low twist) yarns of either nylon6.6 or nylon6. 6.1 A nylon fabric meeting the requirements of this standard should be one with yarns of11.0 tex having approximately28 ends and28 picks per centimetre, and mass per unit are
19、a of approximately61g/m 2 . Other constructions may be used provided that the finished fabric meets the requirements listed inTable 1 andTable 2. 6.2 The fabric shall be free from size; it shall be heat-set to enable it to withstand subsequent processing and the scoured fabric shall not contain any
20、impurity which may adversely affect the coating process. 6.3 The fabric shall be uniformly coated on one side with a polyurethane elastomer. The coating shall be free from pin holes and cracks. 6.4 The coated side of the base fabric shall be printed in a one-colour design similar to that of the stan
21、dard pattern, in golden brown No.414 to BS381C. 6.5 The coated fabric shall be silicone-proofed on the coated side. 6.6 The finished fabric shall comply with the requirements ofTable 1 andTable 2. 6.7 The handle and appearance of the coated fabric shall match that of the standard pattern. 6.8 The fi
22、nished fabric shall be capable of repeated sterilization or disinfection by any of the approved methods generally available in hospitals as described inAppendix A.BS5455:1977 2 BSI 09-1999 Table 1 Physical requirements Table 2 Colour fastness requirements Property Max./Min. Requirements Methods of t
23、est Width (cm) min. As ordered BS 3424 amethod 1 Thickness (mm) max. 0.127 BS 2544 Mass/unit area (g/m 2 ) min. 102 BS 3424 amethod 5A Breaking strength (N) longitudinal direction min. 580 BS 3424 a cross direction min. 535 method 6A Tear strength (N) longitudinal direction min. 36 BS 3424 a cross d
24、irection min. 36 method 7B Surface drag (degrees) min. 25 BS 3424 amethod 12 Resistance to water penetration (cm), average of not less than: as received min. 120 BS 3424 amethod 29C after treatment in N/NaOH min. 80 B.1 after abrasion min. 60 B.2 after treatment in methylethyl ketone min. 120 B.3 af
25、ter dry cleaning min. 120 B.4 after treatment in 70% v/v ethanol min. 120 B.5 after treatment in sodium hypochlorite (2% available chlorine) min. 120 B.6 a BS 3424:1973. Agency Requirement Methods of test Minimum rating for colour change Minimum rating for staining Light 5 BS 1006 amethod 2. Coated
26、side up Washing 4 to 5 4 to 5 BS 3661-18 Steam 4 to 5 BS 3661-9 Dry cleaning 4 to 5 4 to 5 Discoloration of solvent BS 3661-20 andB.4 of this specification Ethanol 70% v/v 4 to 5 4 to 5 B.7 Sodium hypochlorite (2% available chlorine) 4 to 5 4 to 5 a BS 1006:1971.BS5455:1977 BSI 09-1999 3 Appendix A
27、Sterilization and disinfection procedures approved by the Department of Health and Social Security Any of the following methods of sterilization are approved by the DHSS but method a) is preferred. In all issues of dispute the criteria for acceptance shall be up to10 sterilizations employing method
28、a) or b)3). a) Sterilization by steam in a porous load sterilizer manufactured to the requirements of BS3970-1. Automatic process control providing sterilizing conditions of134+ 4, 0 C for not less than3min. b) Sterilization by steam in a sterilizer designed for air removal from the load by downward
29、 displacement. These sterilizers are manually controlled to provide one of the following time/temperature relationships throughout all parts of the load 1) 121 + 2, 0 C for not less than15 min. 2) 126 + 3, 0 C for not less than10 min. 3) 134 + 4, 0 C for not less than3 min. The use of downward displ
30、acement sterilizers can entail the exposure of the load to an oxidizing atmosphere at elevated temperatures caused by the inherently slow removal of air from the load. The steaming time can be in excess of2h before correct conditions are obtained throughout the load and the exposure in 1), 2), or 3)
31、 finally given. c) Sterilization by steam at subatmospheric pressure with an add mixture of formaldehyde vapour in a purpose built sterilizer complying with the requirements of BS3970. Exposure to sterilizing conditions is for up to2h at73 C. d) Disinfection by steam at subatmospheric pressure at73
32、C for up to30min, using a sterilizer/disinfector as in paragraph c). Appendix B Tests NOTEIn carrying out the following tests due notice should be taken of the potentially hazardous nature of the reagents used and precautions should be taken to prevent personnel from coming into contact with boiling
33、 solution and spray. It is recommended that all glassware should be of borosilicate3.3; and that goggles conforming to the requirements of BS2092:1967 “C” type should be worn along with protective gloves and lab coat or apron. In addition a suitable eyewash should be kept convenient. B.1 Test for re
34、sistance to water penetration after treatment in sodium hydroxide Immerse not less than five specimens of the coated fabric, each measuring75mm 75mm, in boiling sodium hydroxide solution (40g NaOH per litre) for10min in such a manner as to avoid contact between specimens and mechanical agitation or
35、rubbing of the specimens. Any specimens which stick together should be discarded and the test repeated on fresh specimens. Means shall be provided for immersing all five specimens into the solution simultaneously and for their simultaneous removal and rinsing. Immediately after removal of the specim
36、ens from the solution thoroughly rinse the wet specimens in running tap water, dry them in air at80 2 C for10min and test for resistance to water penetration using method29C of BS3424:1973. The apparatus should enable the concentration of the solution to be maintained by prohibiting evaporation whil
37、st maintaining normal atmospheric pressure. B.2 Test for resistance to water penetration after abrasion After carrying out not less than two wash tests under the conditions described in BS3661-18, subject not less than four specimens to the test described in method27 of BS3424:1973, except that each
38、 specimen shall be mounted on the bottom plate with the coated face upwards over a felt pad cut from felt of3.2mm thickness, specified in BS4060 as PKF1 white. The abradant, mounted on the movable head of the test instrument, shall be the standard abrasive fabric specified in Appendix A of BS2543:19
39、70, and the weight-piece added to the moving head shall be400g. After5000 rubs, determine the resistance to water penetration using method29C of BS3424:1973. B.3 Test for resistance to water penetration after treatment in methyl ethyl ketone (MEK) Mount not less than five specimens of the coated fab
40、ric each measuring75mm 75mm in a frame to prevent curling, agitate them in methyl ethyl ketone for30min at room temperature and then dry them in air at80 2 C for10min. Determine the resistance to water penetration using method29C of BS3424:1973.BS5455:1977 4 BSI 09-1999 B.4 Test for resistance to wa
41、ter penetration and determination of colour fastness after dry cleaning Treat separately not less than five specimens of the coated fabric each measuring75mm 75mm according to the method described in BS3661-20. Determine the resistance to water penetration using method29C of BS3424:1973. Before test
42、ing for water penetration assess one of the specimens for change of colour. Also assess the discoloration of the solvent used in testing the specimen. B.5 Test for resistance to water penetration after treatment in ethanol Prepare not less than five specimens by drawing a circle50mm in diameter on t
43、he printed face of fabric specimens each measuring75mm 75mm. Place each specimen on a75mm watch glass with the printed face uppermost, and cover the marked area with an aqueous solution of70% v/v ethanol at20 2 C. Cover each watch glass so as to prevent evaporation. After 30 min pour off the solutio
44、n, rinse each specimen in running tap water, blot with filter paper and then dry each in air at80 2 C for10min. Test each specimen for resistance to water penetration using method29C of BS3424:1973. B.6 Test for resistance to water penetration after treatment in sodium hypochlorite Prepare not less
45、than five specimens by drawing a circle50mm in diameter on the printed face of fabric specimens each measuring75mm 75mm. Place each specimen on a75mm watch glass with the printed face uppermost and cover the marked area with an aqueous solution of laboratory grade sodium hypochlorite (2% available c
46、hlorine), at20 2 C for10min. After30min pour off the solution, rinse each specimen in running tap water, blot with filter paper and then dry each in air at80 2 C for10min. Test each specimen for resistance to water penetration using method29C of BS3424:1973. B.7 Test for colour fastness to ethanol a
47、nd sodium hypochlorite Prepare two composite specimens by sewing samples of bleached cotton fabric, free from starch or other finish, and each measuring50mm 40mm, to one half of the printed side of each test specimen, measuring100mm 40mm, leaving half of each specimen uncovered. a) Immerse one compo
48、site specimen in70% v/v aqueous solution of ethanol at20 2 C for30min. b) Immerse the other composite specimen in an aqueous solution of laboratory grade sodium hypochlorite (2% available chlorine) at20 2 C for30min. c) Remove the stitching along three sides, open out and dry the composite specimens
49、 at room temperature. Assess the change in colour of the uncovered portions of the specimens and the staining of the bleached cotton fabric using the grey scales (see BS2662 and BS2663).BS5455:1977 BSI 09-1999 Publications referred to BS 381C, Colours for specific purposes. BS 1006, Methods for the determination of the colour fastness of textiles to light and weathering. BS 2092, Industrial eye-protectors. BS 2543, Woven upholstery fabrics. BS 2544, Method for the determination of thickness of textile fabric. BS 2662, Gr
