1、BRITISH STANDARD BS7200:1989 Specification for Synthetic-fibre needlefeltsBS7200:1989 This BritishStandard, having been prepared under the directionof the Textiles and Clothing Standards Policy Committee, was published underthe authority of the BoardofBSI and comes into effecton 30November1989 BSI12
2、-1999 The following BSI references relate to the work on this standard: Committee referenceTCM/20 Draft for comment88/35733DC ISBN 0 580 17815 3 Committees responsible for this British Standard The preparation of this BritishStandard was entrusted by the Textiles and Clothing Standards Policy Commit
3、tee (TCM/-) to Technical Committee TCM/20, upon which the following bodies were represented: Association of Heavy Textile Proofers of Great Britain Association of Jute Spinners and Manufacturers Flax and Linen Association (GB) Made-Up Textiles Association Man-made Fibres Producers Committee Post Off
4、ice Textile Research Council The following bodies were also represented in the drafting of the standard, through sub-committees and panels: Ministry of Defence Needleloom Felt Manufacturers Association Pressed Felt Manufacturers Association Amendments issued since publication Amd. No. Date of issue
5、CommentsBS7200:1989 BSI 12-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Materials 1 4 Designation 1 5 Requirements 1 6 Sampling 1 7 Conditioning and testing atmosphere 2 8 Marking 2 Appendix A Information to be provided by the purchaser 3 App
6、endix B Supplementary information for MoD contracts 3 Appendix C Physical tests 3 Table 1 Chemical requirements 1 Table 2 Physical requirements 2 Table 3 Cross-references between designations used in BS7200, MoD item names, descriptions, pattern numbers and NATO stock numbers 3 Publications referred
7、 to Inside back coverBS7200:1989 ii BSI 12-1999 Foreword This BritishStandard has been prepared under the direction of the Textiles and Clothing Standards Policy Committee and specifies two grades of needlefelt which will meet both government and commercial general purpose applications including pac
8、kaging. Requirements for needlefelts based on mixtures of animal fibres and cellulosic fibres were specified in BS2628, which was withdrawn in1988. Account has been taken of Ministry of Defence Standard83-70, Cloths, felt, synthetic fibres Part1 Needleloom, for general purposes. Information to be pr
9、ovided by the purchaser is given in Appendix A and Appendix B contains cross-reference information between the designations used in this edition of BS7200 and MoD names, descriptions, pattern numbers and NATO stock numbers. Appendix C gives physical test methods. Many properties cannot be specified
10、objectively and cannot therefore be included in the specification, examples of such properties include colour, handle, appearance and details of additional design features. Public sector purchasing authorities may be able to supply standard patterns which cover these properties and serve to resolve
11、any ambiguities of description. A British Standard does not 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. In partic
12、ular, attention is drawn to Statutory Instrument1986 No.26 Trade Descriptions, the Textile Products (Indications of Fibre Content) Regulations1986. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to4, an inside back cover and a back cover. This sta
13、ndard 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.BS7200:1989 BSI 12-1999 1 1 Scope This BritishStandard specifies requirements for synthetic-fibre based needlefelts manufactured from acrylic,
14、 modacrylic, polyamide, polyester, polypropylene or from blends of these fibres and is intended to be used for general purposes including packaging applications. The standard covers the types of fibre to be used and gives constructional and performance requirements including chemical requirements. N
15、OTE 1The felts specified in this standard are not intended to be used as underlays for textile floor coverings because these are dealt with in BS5808. NOTE 2The titles of publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this BritishStan
16、dard the definitions given in BS6189 apply, together with the following. 2.1 bulk the total length of fabric included in the contract of supply 2.2 lot the total number of rolls of fabric included in any part delivery of the bulk 2.3 synthetic fibre a man-made fibre produced from a polymer built up
17、by man from chemical elements or compounds in contrast to fibres made up by man from naturally occurring fibre-forming polymers 3 Materials Needlefelts shall be manufactured from one of the following fibres as defined in BS4815, or from blends of any of them: a) acrylic; b) modacrylic; c) polyamide;
18、 d) polyester; e) polypropylene. NOTEFibres should be blended, and needled to form a uniform product substantially free from permanent ridges and creases and from unteased pieces of fibre. 4 Designation Felts shall be described by a condensed technical description containing the following elements:
19、a) a letter to indicate the grade of felt i.e.soft (S) or hard (H); b) a number to indicate the nominal thickness. Example: S5indicates the felt to be soft, with a nominal thickness of5mm. 5 Requirements 5.1 General Felts shall comply with the requirements of Table 1 and Table 2. 5.2 Fibre content W
20、here the fibre content is specified, it shall be determined by the appropriate method described in BS4407, and shall be expressed as a percentage of the clean, dry fibre mass. 5.3 Tolerance on dimensions The variation in width of any piece shall not exceed4% of the width specified in the contract or
21、 order. 5.4 Freedom from metallic inclusions The felts shall be free from metallic inclusions. Table 1 Chemical requirements 6 Sampling Each sample shall consist of a strip or strips cut from across the full width of the felt to give a total mass sufficient to perform all tests required and of dimen
22、sions appropriate to test to be performed. Samples shall be taken at least1m from the end of a roll. Unless otherwise specified, one sample shall be taken from each manufactured lot not exceeding1000m 2 . Each sample shall consist of a strip not less than150mmwide from across the full width of the p
23、ieces. Property Requirements Method of test pH value of aqueous extract 5.0 to8.0 BS3266 ausing the hot water extraction method Water soluble chloride, as NaCl: maximum% 0.05 Water soluble sulphate, as Na 2 SO 4 : maximum% 0.25 Ash: maximum% 3.5 BS6646 a For determination of water soluble chloride o
24、r water soluble sulphate, the following alternative procedures may be used: a) for water soluble chloride either: 1) automatic microtitration using a chloride ion-selective electrode; 2) ion-chromatography. b) for water soluble sulphate, ion-chromatography. In cases of dispute, gravimetric methods a
25、s specified in BS3266 shall be used.BS7200:1989 2 BSI 12-1999 Table 2 Physical requirements For chemical tests, the sample shall be cut into cubes having sides no more than6mm long and shall be conditioned for24h in accordance with clause7. The cubes shall be mixed together and a number of them rand
26、omly selected to give a test specimen of mass appropriate to the test method under consideration. For physical testing, specimens shall be cut not less than100mm from the selvedges. NOTEAdequate penetration and interchange of extracting liquids may not be obtained if the test samples are not cut int
27、o small pieces. 7 Conditioning and testing atmosphere Unless otherwise indicated, conditioning and testing shall be carried out in the standard temperate atmosphere specified in BS1051, i.e.arelative humidity (r.h.) of65 2% and a temperature of20 2 C. Laboratory samples shall be conditioned by expos
28、ing them for at least24h in the conditioning atmosphere. 8 Marking Each roll shall bear the following particulars: a) The name, trade mark or other means of identification of the manufacturer; b) The number and date of this BritishStandard, i.e.BS7200:1989 1) ; c) The felt type and designation in ac
29、cordance with clause4; d) The nominal width and length and thickness of the piece or sheet; e) The fibre content and any other marking as the contract or order may direct. Grade Tolerance on thickness Retention of thickness after compression a after2min recovery after24h recovery soft hard max. % 15
30、 15 max. % 65 80 min. % 50 65 min. % 70 75 Method of test C.1 C.2 a NOTEThe tests for retention of thickness after compression are type tests directed towards proving a design and are carried out at the beginning of a contract or order. It may be necessary for the tests to be repeated whenever mater
31、ials, or the manufacturing process, are modified. 1) Marking BS7200:1989 on 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 claim is therefor
32、e 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.BS7200:1989 BSI 12-1999 3 Appendix A Information to be provided by the purchaser The following should be detailed in the purc
33、hasers tender or order: a) felt designation (see clause4); b) where required, fibre type and content; c) thickness in millimetres; d) width in millimetres; e) any type or types of synthetic fibre which should not be used in the felt, and/or the maximum percentage allowed of any fibre type or types.
34、Appendix B Supplementary information for MoD contracts Table 3 contains cross-reference information between the designations used in BS7200, MoD item names, descriptions, pattern numbers and NATO stock numbers. Table 3 Cross-references between designations in BS7200, MoD item names, descriptions, pa
35、ttern numbers and NATO stock numbers Appendix C Physical tests C.1 Tolerance on thickness Measure the thickness in accordance with method B of BS2544:1987 except take measurements at five equidistant positions along a strip of felt cut in accordance with clause6. Test conditions are as follows: a) p
36、resser foot size,100 0.5mm diameter; b) pressure,2.0 2%kPa; c) time interval before taking thickness reading,10 3s. Express the difference between the measured thickness and the objective thickness as a percentage of the latter. C.2 Thickness retention after compression and recovery Carry out the te
37、st in accordance with BS4939, except that the thickness, measured after2min and after24h, respectively, is expressed as a percentage of the original thickness. Designation Item name Item description Pattern number NATO stock number 8305-99- S5 Cloth, felt, synthetic fibre Needleloom, soft 8610(5) 97
38、7-1212 S10 8610(10) 977-1213 H5 Cloth, felt, synthetic fibre Needleloom, hard 8611(5) 977-1214 H10 8611(10) 977-1215 NOTE 1For the purpose of recording service management interest Table 3 items should be treated as being applicable to all three services. NOTE 2The Navy management code for felt is046
39、2, therefore, the full Navy number is the last seven digits of the NATO Stock Number prefixed by that code, e.g.0462/942-2009. NOTE 3The Army management code for felt isH4, therefore, the full Army number is the NATO Stock Number prefixed by that code, e.g.H4/8305-99-942-2009. NOTE 4The Air Force ma
40、nagement code for felt is32B, therefore, the full Air Force number is the last seven digits of the NATO Stock Number prefixed by that code, e.g.32B/9422009 (the number is not hyphenated).4 blankBS7200:1989 BSI 12-1999 Publications referred to BS1051, Glossary of terms relating to the conditioning, t
41、esting and mass determination of textiles. BS2544, Methods for determination of thickness of textile materials. BS3266, Methods of test for determination of conductivity, pH, water-soluble matter, chloride and sulphate in aqueous extracts of textile materials. BS4407, Methods for quantitative analys
42、is of fibre mixtures. BS4815, Glossary of generic names for man-made fibres. BS4939, Method for determination of thickness loss of textile floor coverings after prolonged heavy static loading. BS5808, Specification for underlays for textile floor coverings. BS6189, Glossary of terms relating to fabr
43、ics and associated fibres, yarns and processes. BS6646, Method for determination of ash of textiles. DEFSTAN83-70, Cloths, felt, synthetic fibres Part1: Needleloom, for general purposes 2) . 2) Referred to in foreword only.BS7200:1989 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInsti
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