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1、BRITISH STANDARD BS 5455:1977 Specification for Polyurethane coated nylon fabric for mattress covers UDC 677.494.675.06:678.664.026.3:645.476 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:52:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5455:1977 This British Standard, having been pre
2、pared under the direction of the Fibres, Yarns and Fabrics Standards Committee, was published under the authority of the Executive Board on 28 February 1977 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
3、09621 1 Cooperating organizations The Fibres, Yarns and Fabrics Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and industrial organizations: Association of Jute Spinners and Manufacturers* British
4、 Man-Made Fibres Federation* British Railways Board* British Textile Employers Association* Central Council of the Irish Linen Industry Department of Industry* Knitting Industries Federation Manchester Chamber of Commerce Ministry of Defence* Narrow Fabrics Federation Retail Trading Standards Associ
5、ation Inc. Textile Institute Warp Knitters Association Wool Textile Delegation The Government departments and industrial 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 Sta
6、ndard: British Plastics Federation British Reinforcement Textiles Association British Resin Manufacturers Association British Rubber Manufacturers Association Central Electricity Generating Board Clothing Institute Department of Health and Social Security Furnishing Fabrics Association Ltd Furniture
7、 Industry Research Association Home Office Industrial Safety Protective Equipment Manufacturing Association Leathercloth and Coated Fabric Manufacturers Association London Transport Executive Post Office Rubber and Plastics Research Association Shoe and Allied Trades Research Association Society of
8、Motor Manufacturers and Traders Ltd. Textile Research Council Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:52:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5455:1977 BSI 09-1999i Contents Page Cooperating organizations
9、Inside front cover Forewordii 1Scope1 2References1 3Marking1 4Number of cuts in the roll1 5Standard pattern1 6Material1 Appendix A Sterilization and disinfection procedures approved by the Department of Health and Social Security3 Appendix B Tests3 Table 1 Physical requirements2 Table 2 Colour fastn
10、ess requirements2 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:52:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5455:1977 ii BSI 09-1999 Foreword This British Standard is based on specification TSS/S/310, 029 D of the Department of Health and
11、 Social Security, 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 BS 5223-4. However, whilst fabric conforming to the requirements of this standard meets the needs of the Department of Hea
12、lth and Social 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, blanket
13、s and counterpane) 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 n
14、ot purport to 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
15、front cover, pages i and ii, pages 1 to 4, 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. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec
16、 01 13:52:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5455:1977 BSI 09-19991 1 Scope This British Standard specifies requirements 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
17、 listed on the inside back cover. 3 Marking Each roll of coated fabric shall have a label attached bearing the following information. a) The name and/or distinctive marks of the manufacturer. b) The number of this British Standard, i.e. BS 5455. 4 Number of cuts in the roll A roll of coated fabric c
18、omplying with the requirements of this standard may contain cuts. If the roll consists of more than one piece or length, the number 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 ob
19、tainable from the purchasing authority, shall constitute the standard for any properties not defined in this specification. 6 Material The base fabric shall be manufactured from continuous filament, flat (low twist) yarns of either nylon 6.6 or nylon 6. 6.1 A nylon fabric meeting the requirements of
20、 this standard should be one with yarns of 11.0 tex having approximately 28 ends and 28 picks per centimetre, and mass per unit area of approximately 61 g/m2. Other constructions may be used provided that the finished fabric meets the requirements listed in Table 1 and Table 2. 6.2 The fabric shall
21、be free from size; it shall be heat-set to enable it to withstand subsequent processing and the scoured fabric shall not contain any 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
22、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 standard pattern, in golden brown No. 414 to BS 381C. 6.5 The coated fabric shall be silicone-proofed on the coated side. 6.6 The finished fabric shall comply with the req
23、uirements of Table 1 and Table 2. 6.7 The handle and appearance of the coated fabric shall match that of the standard pattern. 6.8 The finished fabric shall be capable of repeated sterilization or disinfection by any of the approved methods generally available in hospitals as described in Appendix A
24、. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:52:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5455:1977 2 BSI 09-1999 Table 1 Physical requirements Table 2 Colour fastness requirements PropertyMax./Min.RequirementsMethods of test Width (cm)min.As orderedBS 3424a method 1 Thickness
25、(mm)max.0.127BS 2544 Mass/unit area (g/m2) min.102BS 3424a method 5A Breaking strength (N) longitudinal directionmin.580BS 3424a cross directionmin.535method 6A Tear strength (N) longitudinal directionmin.36BS 3424a cross directionmin.36method 7B Surface drag (degrees)min.25BS 3424a method 12 Resist
26、ance to water penetration (cm), average of not less than: as receivedmin.120BS 3424a method 29C after treatment in N/NaOHmin.80B.1 after abrasionmin.60B.2 after treatment in methylethyl ketonemin.120B.3 after dry cleaningmin.120B.4 after treatment in 70 % v/v ethanolmin.120B.5 after treatment in sod
27、ium hypochlorite (2 % available chlorine)min.120B.6 a BS 3424:1973. Agency Requirement Methods of test Minimum rating for colour change Minimum rating for staining Light5BS 1006a method 2. Coated side up Washing4 to 54 to 5BS 3661-18 Steam4 to 5BS 3661-9 Dry cleaning4 to 54 to 5 Discoloration of sol
28、vent BS 3661-20 and B.4 of this specification Ethanol 70 % v/v4 to 54 to 5B.7 Sodium hypochlorite (2 % available chlorine) 4 to 54 to 5 a BS 1006:1971. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:52:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5455:1977 BSI 09-19993 Appendix A Ster
29、ilization 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 to 10 sterilizations employing method a)
30、or b) 3). a) Sterilization by steam in a porous load sterilizer manufactured to the requirements of BS 3970-1. Automatic process control providing sterilizing conditions of 134 + 4, 0 C for not less than 3 min. b) Sterilization by steam in a sterilizer designed for air removal from the load by downw
31、ard 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 than 15 min. 2) 126 + 3, 0 C for not less than 10 min. 3) 134 + 4, 0 C for not less than 3 min. The use of downward
32、 displacement 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 of 2 h before correct conditions are obtained throughout the load and the exposure in 1), 2
33、), or 3) 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 BS 3970. Exposure to sterilizing conditions is for up to 2 h at 73 C. d) Disinfection by steam at subatmospheric pr
34、essure at 73 C for up to 30 min, 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 conta
35、ct with boiling solution and spray. It is recommended that all glassware should be of borosilicate 3.3; and that goggles conforming to the requirements of BS 2092:1967 “C” type should be worn along with protective gloves and lab coat or apron. In addition a suitable eyewash should be kept convenient
36、. B.1 Test for resistance to water penetration after treatment in sodium hydroxide Immerse not less than five specimens of the coated fabric, each measuring 75 mm 75 mm, in boiling sodium hydroxide solution (40 g NaOH per litre) for 10 min in such a manner as to avoid contact between specimens and m
37、echanical agitation or 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 afte
38、r removal of the specimens from the solution thoroughly rinse the wet specimens in running tap water, dry them in air at 80 2 C for 10 min and test for resistance to water penetration using method 29C of BS 3424:1973. The apparatus should enable the concentration of the solution to be maintained by
39、prohibiting evaporation whilst 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 BS 3661-18, subject not less than four specimens to the test described in method 27 of
40、 BS 3424:1973, except that each specimen shall be mounted on the bottom plate with the coated face upwards over a felt pad cut from felt of 3.2 mm thickness, specified in BS 4060 as PKF 1 white. The abradant, mounted on the movable head of the test instrument, shall be the standard abrasive fabric s
41、pecified in Appendix A of BS 2543:1970, and the weight-piece added to the moving head shall be 400 g. After 5 000 rubs, determine the resistance to water penetration using method 29C of BS 3424:1973. B.3 Test for resistance to water penetration after treatment in methyl ethyl ketone (MEK) Mount not
42、less than five specimens of the coated fabric each measuring 75 mm 75 mm in a frame to prevent curling, agitate them in methyl ethyl ketone for 30 min at room temperature and then dry them in air at 80 2 C for 10 min. Determine the resistance to water penetration using method 29C of BS 3424:1973. Li
43、censed Copy: sheffieldun sheffieldun, na, Fri Dec 01 13:52:59 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5455:1977 4 BSI 09-1999 B.4 Test for resistance to water penetration and determination of colour fastness after dry cleaning Treat separately not less than five specimens of the coated fabric
44、each measuring 75 mm 75 mm according to the method described in BS 3661-20. Determine the resistance to water penetration using method 29C of BS 3424:1973. Before testing for water penetration assess one of the specimens for change of colour. Also assess the discoloration of the solvent used in test
45、ing the specimen. B.5 Test for resistance to water penetration after treatment in ethanol Prepare not less than five specimens by drawing a circle 50 mm in diameter on the printed face of fabric specimens each measuring 75 mm 75 mm. Place each specimen on a 75 mm watch glass with the printed face up
46、permost, and cover the marked area with an aqueous solution of 70 % v/v ethanol at 20 2 C. Cover each watch glass so as to prevent evaporation. After 30 min pour off the solution, rinse each specimen in running tap water, blot with filter paper and then dry each in air at 80 2 C for 10 min. Test eac
47、h specimen for resistance to water penetration using method 29C of BS 3424:1973. B.6 Test for resistance to water penetration after treatment in sodium hypochlorite Prepare not less than five specimens by drawing a circle 50 mm in diameter on the printed face of fabric specimens each measuring 75 mm
48、 75 mm. Place each specimen on a 75 mm watch glass with the printed face uppermost and cover the marked area with an aqueous solution of laboratory grade sodium hypochlorite (2 % available chlorine), at 20 2 C for 10 min. After 30 min pour off the solution, rinse each specimen in running tap water,
49、blot with filter paper and then dry each in air at 80 2 C for 10 min. Test each specimen for resistance to water penetration using method 29C of BS 3424:1973. B.7 Test for colour fastness to ethanol and sodium hypochlorite Prepare two composite specimens by sewing samples of bleached cotton fabric, free from starch or other finish, and each measuring 50 mm 40 mm, to one half of the printed side of each test specimen, measuring 100 mm 40 mm, leaving half of each specimen uncovered. a) Immerse one composite specimen in 70
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