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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 984 : 1990 Incorporati
2、ng Amendment No. 1 ICS 59.080.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Method for Determination of net mass of retail packages of knitting and rug yarns Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2006, Unc
3、ontrolled Copy, (c) BSI BS 984 : 1990Issue 2, March 1998 This British Standard, having been prepared under the direction of the Textiles and Clothing Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 30 September 1990 BSI 1998 First publish
4、ed September 1941 Second edition September 1961 Third edition July 1976 Fourth edition September 1990 The following BSI references relate to the work on this standard: Committee reference TCM/28 Draft for comment 88/42892 DC ISBN 0 580 18366 1 Amendments issued since publication Amd. No.DateText aff
5、ected 9906March 1998Indicated by sideline Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/28, upon which the following bodies were represented: British A
6、ssociation of Clothing Machinery Manufacturers British Clothing Industry Association British Polyolefin Textiles Association Consumer Policy Committee of BSI Flax and Linen Association (GB) Furniture Industry Research Association Linen Sewing Thread Manufacturers Association Man-made Fibres Producer
7、s Committee Ministry of Defence SATRA Footwear Technology Centre Textile Institute Textile Research Council (Hatra) The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Hand Knitting Association Ltd. Confederation of British Wool Texti
8、les Ltd. Institute of Trading Standards Administration International Wool Secretariat Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Issue 1, March 1998BS 984 : 1990 BSI 1998a Summary of pages The following ta
9、ble identifies the current issue of each page. Issue 1 indicates that a page has been introduced for the first time by amendment. Subsequent issue numbers indicate an updated page. Vertical sidelining on replacement pages indicates the most recent changes (amendment, addition, deletion). PageIssuePa
10、geIssue Front cover Inside front cover a b 1 2 2 1 blank original 2 3 4 Inside back cover Back cover original 2 original original 2 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI bblank Licensed Copy: London S
11、outh Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 984 : 1990 1 Contents Page Committees responsibleInside front cover Foreword2 Method 1Scope3 2Definitions3 3Allowances for moisture3 4Determination of net mass of packages3 5Test rep
12、ort3 Appendix AMethod for the determination of the dry mass of a sample4 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 BS 984 : 1990 Foreword This British Standard has been prepared under the direction of t
13、he Textiles and Clothing Standards Policy Committee and forms a revision of BS 984: 1976, which is withdrawn. The present revision has been produced in response to Statutory Instrument: 1986 No. 2049 The Weights and Measures (Packaged Goods) Regulations, 1986, which calls up certain clauses of the 1
14、976 edition of this standard. The Weights and Measures Act 1979, now Part Vof the Weights and Measures Act 1985, introduced provisions for the metrological control of packaged goods including knitting yarn and rug yarn. The law is part of a process of aligning technical laws in all member states of
15、the European Community with the objective of making trade easier. For the purpose of Part Vof the 1985 Act a package is a combination of a container and goods placed into it otherwise than in the presence of the purchaser and from which the contents cannot be removed without breaking open the contai
16、ner. Knitting and rug yarn made up in ball, skein or hank form are also included within the scope of the legislation as open packs, e.g. knitting yarns or rug yarns confined within a band or having a label attached. Rug yarn in cut pack form and knitting and rug yarns which will be used in trade pro
17、cesses or treatments are exempted. The specific responsibility for controlling the mass of knitting and rug yarn subject to the Weights and Measures Act 1985 now lies with the person who makes up the yarn into packages or the person who imports yarn in packages. Those clauses of BS 984 : 1976 referr
18、ed to in S.I. 1986 No. 2049 have been expanded in this edition of the standard, to include in full those subjects formerly covered by reference only to BS 4784 : 1973, which has been withdrawn. The method for determination of the dry mass of a sample of packages is now given in appendix A. Other pro
19、visions in Part Vof the Weights and Measures Act 1985, for the control of knitting and rug yarn, are the subject of the Code of Practical Guidance for Hand Knitting and Rug Yarn, issued by the British Hand Knitting Association Limited and which has been approved by the Secretary of State for Trade a
20、nd Industry. This code gives one way to carry out duties set out in the Act. NOTE. Manufacturers may claim that the declared net mass of a package in grams has been determined in accordance with BS 984, and include this on the package. Compliance with a British Standard does not of itself confer imm
21、unity from legal obligations. In particular attention is drawn to the Weights and Measures (Packaged Goods) Regulations 1986, the Weights and Measures (Marking of Goods and Abbreviations of Units) Regulations 1975 and amendments, the Textile Product (Indications of Fibre Content) Regulations 1986; a
22、nd the Weights and Measures (Knitting Yarns) Order 1988. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 19983 Issue 2, March 1998BS 984 : 1990 Method | | | 1 Scope This British Standard describes procedure
23、s for determining and calculating package masses of knitting and rug yarns, which are intended for retail sale. NOTE. The titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard, the following definitions ap
24、ply. 2.1 net mass The oven-dry mass of a package, adjusted by the appropriate allowance for moisture. 2.2 package The minimum individual unit in which the yarn is offered for sale, e.g. the ball. It excludes any container, confining band or label. 2.3 sample The part of a group or batch of packages
25、randomly selected for the purpose of the test. 3 Allowances for moisture NOTE. Attention is drawn to the allowances for moisture which are those set out in Schedule 3 to Statutory Instrument: 1986, No. 26 The Textile Products (Indications of Fibre Content) Regulations, 1986 and in Statutory Instrume
26、nt : 1988, No. 1350 The Textile Products (Indications of Fibre Content) (Amendment) Regulations, 1988. These give values for a complete range of fibres. In this standard they are applied to dry fibres only. For material consisting of blends of one or more different fibre types, calculate the allowan
27、ce for moisture on a proportional basis from the dry masses of the constituents and their respective allowances using the formula: % 2 100 100 + . M1 100 + r1 M2 100 + r2 M3 100 + r3 where M1, M2, M3are declared mass percentages of each component, and r1, r2, r3are the respective allowances for mois
28、ture of the components. Example A blend of yarn declared to contain 80 % wool and 20 % acrylic fibre will have an allowance for moisture of 14.60 % calculated as follows: 80 % wool / 20 % acrylic: allowance for moisture = =% 2 100 100 1 80 118.25 20 102.00 =2 100 % 100 0.676 53 + 0.196 08 =% 2 100 1
29、00 0.872 61 = (114.60 2 100) % = 14.60 % 4 Determination of net mass of packages 4.1 Determine the oven dry mass of each package in the sample in accordance with the method given in appendix A. 4.2 Calculate the net mass of each package using the formula: net mass (in g) of a package = C 3 100 + r 1
30、00 where C is the oven-dry mass of a package (in g), and r is the appropriate allowance for moisture. 5 Test report The test report shall include the following information: a) the net mass of the package in grams; b) that the method used was in accordance with this British Standard, i.e. BS 984 : 19
31、90; c) identification of the package. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 984 : 1990 4 Appendix Appendix A. Method for the determination of the dry mass of a sample A.1 Principle The sample is dr
32、ied and the oven dry mass of each package determined without removal of non-textile materials. The net mass is then calculated from the oven-dry mass plus the appropriate allowance for moisture as specified in clause 3. A.2 Apparatus A.2.1 Drying apparatus in which air at 1053 8C can be positively c
33、irculated through the package, and which is suitable for the size of package so that channelling of the airstream is avoided. Additionally, the apparatus shall be such that no localized overheating causing scorching, shrivelling or melting of the fibres takes place. A.2.2 A balance capable of detect
34、ing relative changes of 0.005 g on successive determinations of mass. A.3 Procedure Dry the sample to a constant mass at 1053 8C in a ventilated oven or other suitable apparatus designed for forced air drying. Determine the oven dry mass of each package in the sample in grams to an accuracy of 0.05
35、% by one of the following means. a) If the oven or apparatus has a built-in balance, determine the mass of each package in the sample in the oven with the air flow stopped. The mass may be considered constant when successive determinations of mass at intervals of 20 min show no progressive change in
36、 the mass greater than 0.05 %. b) If the apparatus has no built-in balance, dry each package in the sample in a container with perforated ends, close the ends of the container immediately and allow it to cool. The mass may be considered constant as in (a). A.4 Test report Report the oven-dry mass of
37、 the sample in grams. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 984 : 1990 1) A withdrawn standard referred to in the foreword only and now superseded by BS 4784 : Parts 1, 2 and 3. Publications referr
38、ed to BS 1051Glossary of terms relating to the conditioning, testing and mass determination of textiles BS 4784: 19731) Method for the determination of correct invoice mass (weight) of textiles Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 04:40:08 GMT+00:00 2
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