1、BRITISH STANDARD BS EN ISO 7965-2:1997 BS ISO 7965-2:1993, incorporating Amendment No. 1, renumbered Sacks Drop test Part 2: Sacks made from thermoplastic flexible film The European Standard EN ISO 7965-2:1996 has the status of a British Standard ICS 55.080BSEN ISO 7965-2:1997 This British Standard,
2、 having been prepared under the directionof the Consumer Products and Services Sector Board, was published under theauthority of the Standards Board and comes into effect on 15 August 1995 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference PKM/11 Draft
3、for comment 92/45591 DC ISBN 0 580 24437 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PKM/11, Packaging made from flexible materials, upon which the following bodies were represented: Aluminium Federation Association
4、 of the British Pharmaceutical Industry British Aerosol Manufacturers Association Coated Paper and Board Makers Association Department of Trade and Industry (Laboratory of the Government Chemist) Environmental and Technical Association for the Paper Sack Industry Flexible Packaging Association Food
5、and Drink Federation Institute of Wastes Management Packaging and Industrial Films Association Paper Federation of Great Britain Pira International Amendments issued since publication Amd. No. Date Comments 9393 April 1997 Indicated by a sideline in the marginBSEN ISO 7965-2:1997 BSI 12-1999 i Conte
6、nts Page Committees responsible Inside front cover National foreword ii Foreword 2 Foreword iii Text of ISO 7965-2 1BSEN ISO 7965-2:1997 ii BSI 12-1999 National foreword This British Standard has been prepared by Technical Committee PKM/11 and is the English language version of ENISO7965-2:1996 Sack
7、s Drop test Part2:Sacks made from thermoplastic flexible film published by the European Committee for Standardization (CEN). It is identical with ISO7965-2:1993 published by the International Organization for Standardization (ISO). This British Standard is published under the direction of the Consum
8、er Products and Services Sector Board whose Technical Committee PKM/11 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related interna
9、tional and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W44AL. A British Standard does not purport to include all the necessary provisions of a c
10、ontract. 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, pagesi andii, theENISO title page, page2, th
11、e ISO title page, pagesii toiv, pages1 to8, aninside 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
12、 ISO 7965-2 August 1996 ICS 55.080 Descriptors: Packaging, plastics products, thermoplastic resins, bags, tests, drop tests, test equipment English version Sacks Drop test Part 2: Sacks made from thermoplastic flexible film (ISO7965-2:1993) Essais de chute Partie 2: Sacs faits dun film thermoplastiq
13、ue flexible (ISO 7965-2:1993) Scke Stoprfung im freien Fall Teil 2: Scke aus thermoplastischen Kunststoff-Folien (ISO 7965-2:1993) This European Standard was approved by CEN on 1996-03-12. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for gi
14、ving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official ver
15、sions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
16、 Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart
17、 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN ISO 7965-2:1996 EENISO 7965-2:1996 BSI 12-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC122, Packaging, of the International Organization for Standardization (ISO) has been taken over as a
18、 European Standard by Technical Committee CEN/TC261, Packaging, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February1997, and conflicting national st
19、andards shall be withdrawn at the latest by February1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, I
20、taly, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. NOTENormative references to International Standards are listed inAnnex ZA (normative).ISO7965-2:1993(E) ii BSI 12-1999 Contents Page Foreword iii 1 Scope 1 2 Normative references 1 3 Principle 1 4 Ap
21、paratus 1 5 Sampling 1 6 Conditioning 1 7 Procedure 1 8 Test report 3 Annex A (informative) Examples of apparatus for drop testing 4 Annex B (informative) Identification of surfaces of filled sacks for testing 5 Annex C (informative) Example of format for a drop test report 6 Annex ZA (normative) No
22、rmative references to international publications with their relevant European publications Inside back cover Figure 1 Graphical method for calculation of limit height, H 3 Figure A.1 Example of apparatus suitable for flat and side dropping 4 Figure A.2 Example of apparatus suitable for butt dropping
23、 5 Figure B.1 Surface identification 6ISO7965-2:1993(E) BSI 12-1999 iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO tech
24、nical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
25、 with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of
26、 the member bodies casting a vote. International Standard ISO7965-2 was prepared by Technical Committee ISO/TC122, Packaging, Subcommittee SC2, Sacks. ISO 7965 consists of the following parts, under the general title Sacks Droptest. Part 1: Paper sacks; Part 2: Sacks made from thermoplastic flexible
27、 film. Annex A, Annex B andAnnex C of this part of ISO7965 are for information only.iv blankISO 7965-2:1993(E) BSI 12-1999 1 1 Scope This part of ISO7965 specifies a method of vertical impact testing on a filled sack made from thermoplastic flexible film by dropping. It may be performed either as a
28、single test to investigate the effects of vertical impact or as a part of a sequence of tests designed to measure the ability of a sack to withstand a distribution system that includes a vertical impact hazard. This part of ISO7965 specifies the testing procedure and how the results of tests should
29、be presented. It is based on ISO2248 1) , but is specifically related to sacks made from thermoplastic flexible film. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO7965. At the time of publication, th
30、e editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO7965 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently
31、valid International Standards. ISO 2233:1986, Packaging Complete, filled transport packages Conditioning for testing. ISO 7023:1983, Packaging Sacks Method of sampling empty sacks for testing. 3 Principle The filled sack is raised above a rigid surface and released to strike this surface after a fre
32、e fall, the atmospheric conditions, the height of the drop and the position of the package being set in advance. 4 Apparatus The apparatus necessary to carry out the drop test shall include the following (examples are shown inAnnex A): 4.1 Lifting arrangement, which will not damage the sack during e
33、ither lifting or release. 4.2 Means of holding the sack prior to release in its predetermined position. The difference in behaviour of a sack suspended from the top or supported underneath in a butt drop can be significant, and the method of holding the sack before dropping shall be included in the
34、test report. 4.3 Release mechanism, to release the sack in such a way that its fall is not obstructed by any part of the apparatus before striking the impact surface (4.4). 4.4 Impact surface, horizontal and flat, massive enough to be immovable and rigid enough to be nondeformable under test conditi
35、ons. In normal circumstances the impact surface provided should be: of one piece, with a mass at least50times that of the heaviest sack to be tested; flat, such that no two points on its surface differ in level by more than2mm; rigid, such that it will not be deformed by more than0,1mm when an area
36、of100mm 2is loaded statically with10kg anywhere on the surface; sufficiently large to ensure that the sack falls entirely upon the surface. A plastic film may be used on the impact surface under the sack in order not to damage the sack while moving it. 5 Sampling Sampling shall be carried out in acc
37、ordance with ISO7023. 6 Conditioning The filled and closed sacks shall be conditioned in accordance with ISO2233, using one of the designated conditioning atmospheres. 7 Procedure The tests shall be carried out in the same atmospheric conditions as used for conditioning (seeclause6) or, if not, the
38、test shall commence within3min of removing the filled sack from the conditioning atmosphere. 7.1 Filling Fill the sack with the intended commodity or, if this is not possible, with similar material, taking into account type and size of granules etc., to give the same degree of filling. The mass of f
39、illing material shall be within 0,2% of that of the nominal mass of the intended contents of the sack. Close the sack in the intended way. 1) ISO 2248:1985, Packaging Complete, filled transport packages Vertical impact test by dropping.ISO 7965-2:1993(E) 2 BSI 12-1999 7.2 Test dropping procedure 7.2
40、.1 Lifting and release requirements Place the sack under test centrally on the platform(4.1). Raise the platform to a height that is within 2% of the predetermined drop height, defined as the distance between the lowest point of the sack at the time of release and the nearest point of the impact sur
41、face. The sack shall be released from its predetermined position within the following tolerances: a) for drops on any side, the impacting surface of the sack shall be parallel, to within2 , to the impact surface; b) the velocity of the sack at impact shall be within 1% of that which would be achieve
42、d by a free fall. 7.2.2 Dropping procedure NOTE 1The designation of the various surfaces of a filled sack is given inAnnex B. 7.2.2.1 Flat dropping Drop successive sacks alternately on the face side(1) and on the back side (3), so that the first sack is dropped on the face side until it breaks and t
43、he second on the back side until it breaks, and so on. 7.2.2.2 Side dropping Drop successive sacks alternately on the right side(2) and on the left side (4), so that the first sack is dropped on the right side (2) until it breaks and the second on the left side (4) until it breaks, and so on. 7.2.2.
44、3 Butt dropping Drop the sack only on the bottom (5), until it breaks. 7.3 Test methods 7.3.1 Progressive drop height method 7.3.1.1 General This method may be used for flat, side and butt drop testing of sacks made from thermoplastic flexible film. The drop height, h, in metres, is given by the for
45、mula h = h 0 +(n1) %h where A sack shall be considered broken when spillage of the contents occurs. A slight discharge,e.g.from closures or stitch holes, upon impact shall not be considered to be a failure of the sack provided that no further leakage occurs after the sack has been raised clear of th
46、e ground. The type of drop (i.e.flat, side or butt drop), the number of drops (n) and the final drop height at break (h) shall be recorded. The test result can be reported as the average breaking heightand the corresponding number of drops (n). 7.3.1.2 Flat and side drop tests Flat and side drop tes
47、ts shall be initiated at0,85m height (h 0 ). After each drop without any visible failure in the sack, an increment (%h) of0,15m in drop height is made. The test shall be evaluated and results shall be reported in accordance with7.3.1.1. 7.3.1.3 Butt drop test Butt drop tests shall be initiated at0,3
48、0m height(h 0 ). After each drop without any visible failure in the sack, an increment (%h) of0,05m in drop height is made. The test shall be evaluated and results shall be reported in accordance with7.3.1.1. 7.3.2 Constant drop height method This method may be used for testing of sacks made from th
49、ermoplastic flexible film as an alternative to the progressive drop height method. This test may be used for either flat, side or butt dropping and shall be performed from a constant height so selected that the number of drops before rupture is about10. A sack shall be considered broken when spillage of the contents occurs. A slight discharge,e.g.from closures or stitch holes, upon impact shall not be considered to be a failure of the sack provided that no further leakage occurs after the sack has be
