1、CEN EN*787 94 3404589 0069359 327 BRITISH STANDARD Sacks for the transport of food aid - Sacks made of polyethylene film 3s EN The European Standard EN 787 : 1994 has the status of a British Standard Sacs pour le transport de laide alimentaire - Sacs faits dun film de polythylne Scke fr den Transpor
2、t von Lebensmitteln fr die Nahrungsmittelhilfe - Beutel aus Polyethylenfolie 787 : 1994 UDC 621 798.151 663l664.620.1 CEN EN*787 94 = 3404589 0069160 O49 = BS EN 787 : 1994 This British Standard, having been prepared under the direction of the Fackaging and Freight Containers Standards Poiicy Commit
3、tee, was published under the authority of the Standards Board and comes into effect on 15 September 1994 O BSI 1994 Cooperating organizations The European Committee for Standardization (CEN) , under whose supervision this European Standard was prepared, comprises the national standards organizations
4、 of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito, r. y.
5、 Association franaise de normalisation Deutsches Institut fr Normung e.V. Hellenic Organization for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut
6、Norges S tandardiseringsf orbund Instituto Portugus da Qualidade Asociacin Espaola de Normalizacin y Certificacin Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution Amendments issued since publication Amd. No. 1 Date 1 Text affected The following
7、 BSI references relate to the work on this standard: Committee reference PKM/ll Draft for comment 92/42455 DC ISBN O 580 22793 6 CEN EN*787 94 3404589 0067Lbl T5 BS EN 787 : 1994 Contents Cooperating organizations National foreword p%e Inside front cover i Fore word 2 Text of EN 787 3 National annex
8、 NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back cover National foreword This British Standard has been prepared under the direction of the Packaging and Freight Containers Standards Policy Committee and is the English language v
9、ersion of EN 787 : 1994 Sacks for the transport of food aid - Sacks made of polyethykm film, published by the European Committee for Standardization (CEN) . Compliance with a British Standard does not of itself confer immunity from legal obligations. i CEN EN*787 94 W 3404589 00bLb2 911 EUROPEAN STA
10、NDARD NORME EUROPENNE EUROPISCHE NORM EN 787 May 1994 UDC 621.798.151:663/664.620. I Descriptors: Packing, bags, plastics, sheets, polyethylene, food products, characteristics, tests, mechanical strength English version Sacks for the transport of food aid - Sacks made of polyethylene film Sacs pour
11、le transport de laide ahentaire - Sacs faits dun film de polythylne Scke fr den Transport von Lebensmitteln fr die Nahrungsmittelhilfe - Beutel aus Polyethylenfolie This European Standard was approved by CEN on 1994-05-12. CEN members are bound to comply with the CENXENELEC Internal Regulations whic
12、h stipulate the conditions for giving 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 Stan
13、dard exists in three official versions (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 stan
14、dards bodies of Austria, Belgium, 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 Cen
15、tral Secretariat: rue de Stassart 36, B-1050 Brussels O 1994 Copyright reserved to CEN members Ref. No. EN 787 : 1994 E CEN ENx787 94 = 3404589 00bLb3 858 = page 2 EN 787 : 1994 Foreword This European standard was dram up by CEN Technical Committee CEN/TC 120, Sacks for the transport of food aid, th
16、e secretariat of which is held by NNI. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). This European Standard shall be given the status of a national stan
17、dard, either by publication of an identical text or by endorsement, at the latest by November 1994, and conflicting national standards shall be withdrawn at the latest by November. In accordance with the common CENKENELEC Rules, the following countries are bound to implement this European Standard:
18、Austria, Belgium, Denmark, Finland, fiance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Foreword 1 Scope 2 Normative references 3 Definitions 4 General characteristics 5 Test methods and requirements 6 M
19、arking 7 Test report page 2 3 3 3 3 4 4 4 CEN EN*787 94 3404589 00b9Lb4 794 W 1 Scope This European standard specifies the general characteristics, requirements and methods of test for sacks made of polyethylene film, This standard applies to sacks made of polyethylene film with a net filling weight
20、 up to 2000 g for packing and transporting foodstuffs for food aid and to polyethylene film sacks with a net filling weight up to 1000 g supplied as empty sacks together with foodstuffs packed in sacks for the distribution of small quantities. The packaging surrounding filled sacks is not covered by
21、 this standard. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendme
22、nts to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 22233 1992 Packaging - Complete filled transport packages. Conditioning for tes
23、ting (IS0 2233 : 1986) Vocabulary and types - Part 2: Sacks made from themngplastic.jkxible film EN 26590-2 : 1992 Packaging - Sacks - (IS0 6590-2 : 1986) EN 26591-2 1992 Packaging - Sacks - Description and method of measur- - Part 2: Empty sacks made from themzoplasticjlexble film Packaging - Sacks
24、 - Method of sampling empty sacks for testing (IS0 7023 : 1983) IS0 1184 : 1983 Plastics - Determination of tensile properties of films IS0 7765-1 : 1988 Plastic film and sheeting - Determination of impact resistance by the free-falling dart method - Part 1: Staircase method (IS0 6591-2 : 1985) EN 2
25、7023 : 1992 fige 3 EN 787 : 1994 3 Definitions For the purpose of this Standard, the following definitions apply. NOTE. Other terms used in the manufacture of sacks are defined in EN 26590-2 : 1986. 3.1 Sack made of polyethylene film Container made from polyethylene tubular film sealed at least at o
26、ne end by a seam. NOTE 2. Hereafter where the word sack is used in the text of this European Standard, a sack made of polyethylene film is to be understood. 3.2 Ply A film of polyethylene forming the walls of a sack. 3.3 Heat-sealed seam A closure produced by heat-sealing the bottom or top of the sa
27、ck. 4 General characteristics 4.1 Construction 4.1.1 The sacks shall be made of polyethylene tubular film. 4.1.2 The sacks shall be made of only one ply. 4.1.3 The sacks shall be flat. 4.1.4 The empty sacks, laid flat, shall have a rectangular shape. 4. I. 5 The sack seam shall be designed to preven
28、t leakage of the product during transport. 4.2 Dimensions 4.2.1 The sack dimensions shall be chosen so that the dimensions of the fiiled sack are aligned with the specified dimensions of the surrounding packaging. 4.2.2 The dimensions and dimensional tolerances of the sack should be agreed upon betw
29、een the purchaser and the supplier. 4.2.3 The dimensions and dimensional tolerances of the sack shall be recorded in the ordering documents. 4.2.4 The description of the dimensions, the methods of measuring the dimensions and the dimensional designation of the sack shall be in accordance with EN 265
30、91-2. 4.3 Food compatibility Sacks which come in contact with foodstuffs shall meet the legal requirements of the CEN member states which are applicable to them. CEN EN*787 94 H 3404589 00bLb5 b20 Page 4 EN 787 : 1994 5 Tkst methods and requirements 5.1 Sampling 5.1.1 Sampling shall be in accordance
31、 with EN 27023. At least 30 empty sacks shall be sampled. 5.1.2 Samples shall be taken on the day that the empty sacks are ready for dispatch at the suppliers. 5.1.3 If, as a result of an accident during sampling or testing, resampling is necessary, a new sample shall be taken by the same procedure.
32、 Selection may then, however, be made from the same units as before unless agreed otherwise. 5.2 Conditioning 5.2.1 Before testing, all samples shall be conditioned in accordance with EN 22233 : 1992 condition G (temperature + 23 OC f 2 OC, relative humidity 50 % f 5 %). 5.2.2 The minimum period for
33、 conditioning shall be not less than 8 h. 5.2.3 The various tests described below shall be carried out in the same atmospheric conditions as used for conditioning. If this is not possible, the tests shall commence within 10 min of conditioning. 5.3 Test date Ail tests shall be carried out within 4 w
34、eeks of the date that the empty sacks are ready for dispatch at the suppliers. 5.4 Tests 5.4.1 Determination of the tensilerce of the film The tensile force of the film shall be determined as described in IS0 1184 using 15 mm wide test strips, with a gauge length of 100 mm and a testing speed of 500
35、 mm/min. 5.4.2 Determination of the seam strength of the sack. The seam strength shall be determined in accordance with IS0 1184 using 15 mm wide strips, with a gauge length of 100 mm, a seam lying transversely to the direction of pull and in the middle of the test strip and with a testing speed of
36、500 dmin, until iupture. 5.4.3 Determination of the impact resistance of the film The impact resistance of the film shall be determined in accordance with IS0 7765-1 : 1988, method A. 5.5 Acceptance criteria 5.5.1 l?mile force of the film The tensile force of the film shall be at least 7,5 NI15 mm i
37、n the longitudinal and transverse directions at 15 % elongation. 5.5.2 Seam strength of the sack The ultimate tensile strength of the test piece with a seam shall be at least 70 % of the ultimate tensile strength of the film without a seam in the same direction (sealing factor 0,7). 5.5.3 Impact res
38、istance of the film The mass for 50 % failure shall be not less than 120 g. 6 Marking If permitted, marking of the sack by the supplier is voluntary. 7 %st report The test report shall include a statement that all tests have been carried out in accordance with this European Standard and shall includ
39、e at least the following information: a) name and address of the manufacturer; b) number of the contract or order reference; c) date, place and description of sampling; d) description of the sack in accordance with 4.2.4 of this European Standard; e) results of the tensile force test, mean value and
40、 the standard deviation; f) results of the seam test, mean value and standard deviation; g) results of the impact resistance test; h) any deviations from the test methods specified in this standard; i) name and address of the tester; j) signature of the tester; k) date of test. CEN ENx787 94 W 34045
41、89 00b9Lbb 567 W BS EN 787 : 1994 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Packaging and Freight Containers Standards Policy Committee (PKM-) to Technical Committee PKM/ll , upon which th
42、e following bodies were represented: Aluminium Federation Association of the British Pharmaceutical Industry British Aerosol Manufacturers Association British Paper and Board Industry Federation Chartered Institute of Purchasing and Supply Coated Paper and Board Makers Association Department of Heal
43、th Department of Trade and Industry (Laboratory of the Government Chemist) Environmental and Technical Association for the Paper Sack Industry Flexible Packaging Association Food and Drink Federation Institute of Wastes Management Packaging and Industrial Films Association Pira International Sterili
44、zation Packaging Materials Association The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Cement Association British Polyolefin Textiles Association Chemical Industries Association Jute Sack and Bag Manufacturers Association Paper Sa
45、ck Development Association Ltd. Potato Marketing Board United Kingdom Jute Goods Association United Kingdom Sugar Industry Association National annex NB (informative) Cross-references Publication referred to EN 22233 : 1992 Corresponding British Standard BS EN 22233 : 1993 Complete filled transport
46、packages. Method of conditioning for testing BS EN 26590 Packaging - Sacks - Vocabulary and types Part 2 : 1993 Sacks made from thermoplasticJbk film BS EN 26591 Packuging - Sucks - Description and method of meclsurement Part 2 : 1993 Empty sucks made from therrnoplasticjkxible film BS EN 27023 : 19
47、93 Packaging - Sacks - Method of sampling mpty sacks for testing EN 26590-2 : 1986 EN 26591-2 : 1985 EN 27023 : 1983 CEN ENt787 94 = 3404589 0069367 4T3 BS EN 787 : 1994 BSI 2 Park Street London W1A 2BS BSI Linford Wood Milton Keynes MK14 6LE 9409 - 4 - 0.4k - FP BSI - British Standards Institution
48、BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Contract requirements A British Standard does not purport to include all the necessary provisions of a
49、 contract. Users of British Standards are responsible for their correct application. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. Any person who finds an inaccuracy or ambiguity while using this British Standard should notify BSI without delay so that the matter may be investigated swiftly. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of s
