1、BRITISH STANDARD BS3313-1: 1968 Incorporating Amendment No.1 Specification for Aluminium capping foil and strip for dairy product containers Part1: Aluminium capping foil for glass containersBS3313-1:1968 This BritishStandard, having been approved by the DairyingIndustry Standards Committee and endo
2、rsed by theChairman of the ChemicalDivisional Council, waspublished under the authorityof the General Councilon 15 October1968 BSI11-1999 First published November1961 First revision October1968 The following BSI references relate to the work on this standard: Committee reference PKM/571 (formerly DA
3、C/23) Draft for comment68/778 ISBN 580 00321 3 Co-operating organizations The Dairying Industry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associati
4、on of Public Analysts Chemical Society Commonwealth Bureau of Science and Technology Dairy Engineers Association* Dairy and Ice Cream Equipment Association Hannah Dairy Research Institute Milk Distributive Council* Milk Marketing Board* Milk Marketing Board for Northern Ireland* Milking Machine Manu
5、facturers Association Ministry of Agriculture, Fisheries and Food* Ministry of Health Ministry of Technology, Laboratory of the Government Chemist National Association of Creamery Proprietors and Wholesale Dairymen* National Farmers Union National Institute for Research in Dairying* Office of the Hi
6、gh Commissioner for Australia Office of the High Commissioner for New Zealand Royal Association of British Dairy Farmers Royal Institute of Public Health & Hygiene Royal Society for the Promotion of Health Scottish Milk Marketing Board Scottish Milk Trade Federation Society of Chemical Industry Soci
7、ety of Dairy Technology* United Kingdom Dairy Association University of Reading West of Scotland Agricultural College The scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the prep
8、aration of this BritishStandard: Amalgamated Master Dairymen Ltd. British Aluminium Foil Rollers Association Co-operative Union National Dairymens Association (Incorporated) Amendments issued since publication Amd. No. Date of issue Comments 5469 July1988 Indicated by a sideline in the marginBS3313-
9、1:1968 BSI 11-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Material 1 3 Width 1 4 Thickness 1 5 Lubricant 1 6 Coating 1 7 Reel dimensions 2 8 Storage 2 9 Marking 2 Appendix A Method for the determination of tensile strength of foil 3 Appendix B Method of
10、 determining the thickness of foil 3BS3313-1:1968 ii BSI 11-1999 Foreword This standard makes reference to the following BritishStandards: BS1470, Specification for wrought aluminium and aluminium alloys for general engineering purposes: plate, sheet and strip. BS1610, Materials testing machines and
11、 force verification equipment. BS6106, Specification for1 pint(568ml) multi-trip glass bottles for pasteurized milk. This BritishStandard forms Part1 of a specification in two parts, which was first prepared under the authority of the Dairying Industry Standards Committee in accordance with a joint
12、proposal from the British Aluminium Foil Rollers Association and the Ministry of Agriculture, Fisheries and Food, supported by the Society of Dairy Technology, in1961. Part1 was originally intended to cover the requirements for capping foil for ordinary milk bottles, and Part2 to cover the thicker m
13、aterials for use where stronger and stiffer aluminium strip is necessary. However, during the preparation of Part2, it was decided to alter the scope of the two parts to cover capping foil for glass containers and for plastics containers respectively, and for the standard as a whole to cover foil fo
14、r dairy product containers in general. This revision of Part1 removes the specification of particular permitted widths of capping foil, partly owing to the wide variety of container dimensions now available and partly owing to the development of higher-speed capping machines which require differing
15、widths of foil. One larger reel diameter has been included. NOTEThe coherent system of units adopted by the International Organization for Standardization (ISO), known as the SI system has been used in this revision. Thus forces are quoted in terms of the newton (N) and stresses in terms of the bar
16、(bar). The bar is defined as10 5 N/m 2 , and the newton as that force which, when applied to a body having a mass of one kilogramme, gives it an acceleration of one metre per second squared. Equivalents in metric units are given for the convenience of users unfamiliar with SI units. 1bar=10.1972gf/m
17、m 2 1N=0.10197kgf 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. Summary of pages This d
18、ocument comprises a front cover, an inside front cover, pagesi andii, pages1 to3 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.BS3313-1:1968 BSI 11-1999 1 1 Scope
19、 Part1 of this BritishStandard covers requirements for aluminium foil, of a thickness not exceeding0.1mm, for caps and other skirted closures for glass dairy product containers. 2 Material 2.1 Chemical composition. Capping foil shall be made of aluminium complying with the requirements for chemical
20、composition of BS1470 1) , 1200. 2.2 Condition. The material shall be either annealed (soft) or of an intermediate temper as agreed between the purchaser and the vendor. 2.3 Tensile strength. When tested by the method given in Appendix A, the tensile strength of the material shall comply with the fo
21、llowing: 3 Width The widths of capping foil shall be as agreed between the purchaser and the vendor. Attention is, however, drawn to the requirements of BS6106 2)with regard to the nominal external diameters of milk bottle neck finishes. The tolerance on the agreed width shall be 0.35mm. 4 Thickness
22、 The nominal thickness of capping foil shall be as agreed between the purchaser and the vendor. The thickness shall be determined by the method described in Appendix B. When measured by the method described in Appendix B, the thickness of any specimen of the foil shall not deviate by more than10% on
23、 either side of the agreed nominal thickness. When the thickness of any sample falls outside this limit, the reel of foil concerned shall be deemed not to comply with this BritishStandard. 5 Lubricant Unless otherwise specified by the purchaser, the reel of capping foil shall be supplied in the pre-
24、lubricated condition. The composition of any lubricant shall be such that it does not contain substances injurious to health or have any deleterious effect on the quality, flavour, odour or appearance of the dairy product. If the lubricant is a mineral oil, it shall comply with the requirements of p
25、aragraphs1,2 and3 of Part1 of the Schedule to the Mineral Hydrocarbons in Food Regulations,1966 (S.I.1966, No.1073). 6 Coating The capping foil shall be plain or finished with an outer surface coating material and/or printed according to the requirements of the purchaser. No transfer of colouring ma
26、tter or printing ink to the inner surface of the foil in the reel and/or to the dairy product shall occur. The composition of any inner surface coating used shall be such that it does not contain substances injurious to health or have any deleterious effect on the quality, flavour, odour or appearan
27、ce of the dairy product. 1) BS1470, “Specification for wrought aluminium and aluminium alloys for general engineering purposes: plate, sheet and strip”. Composition Condition Tensile strength Minimum Maximum hbar kgf/mm2 hbar kgf/mm2 1200 Annealed (soft) 9.8 10 Intermediate temper 10.3 10.5 14.7 15
28、2) BS6106, “Specification for1 pint(568ml) multi-trip glass bottles for pasteurized milk”.BS3313-1:1968 2 BSI 11-1999 7 Reel dimensions 7.1 Cores. The cores shall be made of metal, cardboard or plastics as agreed between the purchaser and the vendor. They shall have an internal diameter of58mm (nomi
29、nally2! in). Cores shall not be split and the ends of the cores shall not project beyond the exposed edges of the foil. 7.2 Reel diameters 7.2.1 Except as provided in7.2.3, reel diameters shall conform to the ranges: 7.2.2 Not more than10% of the weight of the reels supplied shall fall outside the d
30、iameter range specified by the purchaser. 7.2.3 For orders of less than250kg(5cwt) the lower diameter limit specified in7.2.1 shall not apply. 7.3 Joins. There shall be no joins in any reel. 7.4 Attachment to core. Text deleted. 8 Storage Reels of foil shall be stored under clean, cool, dry conditio
31、ns. Rapid fluctuations of temperature shall be avoided. It is recommended that reels of foil should not be stored for longer than six months from the date of delivery. 9 Marking Reels of foil, or the documents relating thereto, shall be marked with the following information: 1) The number of this Br
32、itishStandard, i.e.BS3313-1. 2) The nominal foil thickness, inmm. 3) The nominal foil width, inmm. 4) The name or other identification of the manufacturer. 5) The description “lubricated” or “un-lubricated” as appropriate. 6) The composition and condition of the aluminium. NOTEMarking BS3313-1 on or
33、 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 therefore solely the responsibility of the person making the claim. Such a declaration
34、 is not to be confused with third party certification of conformity, which may also be desirable. 190215mm(7“8“ in) or 230255mm(910in) or 280305mm(1112in) or 305380mm(1215in).BS3313-1:1968 BSI 11-1999 3 Appendix AMethod for the determination of tensile strength of foil A.1 Apparatus The apparatus fo
35、r determining the tensile strength of aluminium foil shall be a machine conforming to the following requirements: 1) Having two clamps which move in the direction of the applied stress so aligned that they will hold the specimen in one plane throughout the test without slip. At the start of the test
36、, the edges of the jaws of the clamps shall shall be1005mm apart. 2) Having means of applying a gradually increasing force to the specimen until it breaks, the increase being such that the additional force applied each second is not different by more than5% from the additional force applied in the p
37、revious second (this condition is fulfilled by the usual pendulum type of apparatus). The rate of loading shall be between2.26N/s and14.7N/s(0.23kgf/s and1.5kgf/s). 3) Having means of indicating the applied force at the instant of fracture to an accuracy of 2%. Therange shall be such that the breaki
38、ng force of the specimen falls between15% and85% of the maximum on the scale. A.2 Calibration It is recommended that the test apparatus is calibrated by the appropriate method described in BS1610 3) , at least once every12 months. A.3 Preparation of the specimens Five specimens shall be cut from the
39、 sample, using a guillotine with guides to produce a specimen250mm 10mm. Each specimen shall be examined and any specimen showing nicks, burrs or creases shall be rejected. Determine the thickness of each specimen by the method described in Appendix B.2. A.4 Method of test The specimens shall be cla
40、mped in the machine at their ends. Tightly clamp one end of each strip in the upper jaw after placing the strip loosely in the lower jaw and checking its alignment. Then tightly clamp the lower end and apply the load. If during testing uneven tension is evident across the strip the test shall be aba
41、ndoned. The result of each individual breaking load shall be recorded. The tensile strength of each piece shall be calculated in hectobars from the original area of the cross section and the force required to break the specimen. The tensile strength of the sample shall be reported as the arithmetic
42、mean of the first values obtained on the five specimens. Appendix BMethod of determining the thickness of foil B.1 Procedure Prepare specimens of foil of known area from flat increased samples by cutting round a metal template with bevelled edges with a sharp knife. A template having dimensions250mm
43、 40mm giving an area of0.010m 2is recommended. Wash the specimens with a suitable solvent, e.g.acetone, to remove all traces of lubricant, surface coating and printing ink. Dry the foil specimens and weigh on a balance accurate to at least0.5mg. B.2 Calculation of result For a specimen of A m 2area,
44、 Weight per unit area in g/m 2= Thickness of foil in millimetres (mm) = Where density of foil made of1200 aluminium=2.71g/cm 3 . 3) BS1610, “Materials testing machines and force verification equipment”. Weight in grammes A - Weight per unit areag/m 2 ()10 3 Density of foil g/cm 3 () -BS3313-1: 1968
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