1、BRITISH STANDARD BS EN 769:1994 Sacks for the transport of food aid Sacks made of woven cotton/polyolefin fabric The European Standard EN 769:1994 has the status of a British Standard UDC 621.798.151-037.6:663/664:620.1BSEN 769:1994 This British Standard, having been prepared under the directionof t
2、he Packaging and Freight Containers Standards Policy Committee, was publishedunder the authorityofthe Standards Boardand comes into effect on 15 September 1994 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference PKM/11 Draft for comment 92/42248 DC ISBN
3、0 580 22791 X Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de norma
4、lisation Denmark Dansk Standard Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Irelan
5、d Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskom
6、missionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN 769:1994 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN
7、 769 3 National annex NA (informative) Committees responsible 6 National annex NB (informative) Cross-references Inside back coverBSEN 769:1994 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Packaging and Freight Containers Standards Policy Commit
8、tee and is the English language version of EN769:1994 Sacks for the transport of food aid Sacks made of woven cotton/polyolefin fabric, published by the European Committee for Standardization (CEN). A British Standard does not purport to include all the necessary provisions of a contract. Users of B
9、ritish 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, theEN title page, pages2to6, an inside back cover
10、 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 769 May 1994 UDC 621.798.151-037.6:663/664:620.1 Descriptors:
11、Packing, bags, textile packaging, sackcloth, cotton, plastic packaging, polyolefines, food products, capacity, characteristics, tests English version Sacks for the transport of food aid Sacks made of woven cotton/polyolefine fabric Sacs pour le transport de laide alimentaire Sacs faits en toile de c
12、oton/poloyolfine tisse Scke fr den Transport von Lebensmitteln fr die Nahrungsmittelhilfe Scke aus Baumwoll/Polyolefin Mischgewebe This European Standard was approved by CEN on 1994-05-12. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for gi
13、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
14、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,
15、 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
16、 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 769:1994 EEN 769:1994 BSI 12-1999 2 Foreword This European standard was drawn up by CEN Technical Committee CEN/TC120, Sacks for the transport of food aid, the secretariat of which is held by NNI. This European Standard has been
17、 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 standard, either by publication of an identical text or by endorsement, at
18、 the latest by November1994, and conflicting national standard shall be withdrawn at the latest by November1994. In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece
19、, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 3 4 General characteristics 3 5 Test methods and test requirements 4 6 Marking 5 7 Test report 5EN 769:1994 B
20、SI 12-1999 3 1 Scope This European Standard specifies the general characteristics, requirements and methods of test for sacks made of woven cotton/polyolefin fabric. This European Standard is applicable to sacks made of woven cotton/polyolefin fabric, having a filling mass up to 50 kg, intended for
21、the transport of food aid. 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 subseque
22、nt amendments 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. prEN 1086:1993, Sacks for the transport of food aid Recommendations on
23、 the selection of type of sack and the liner in relation to the product to be packed. EN 22206:1992, Packaging Complete, filled transport packages Identification of parts when testing. (ISO 2206:1987) EN 22233:1992, Packaging Complete, filled transport packages Conditioning for testing. (ISO2233:198
24、6) EN 26590-1:1992, Packaging Sacks Vocabulary and types Part 1: Paper sacks. (ISO6590-1:1983) EN 26590-2:1992, Packaging Sacks Vocabulary and types Part 2: Sacks made from thermoplastic flexible film. (ISO 6590-2:1986) EN 26591-2:1992, Packaging Sacks Description and method of measurement Part 2: E
25、mpty sacks made from thermoplastic flexible film. (ISO 6591-2:1985) EN 27023:1992, Packaging Sacks Method of sampling empty sacks for testing. (ISO 7023:1983) EN 27965-1:1992, Packaging Sacks Drop test Part 1: Paper sacks. (ISO 7965-1:1984) ISO 3676:1983, Packaging Unit load sizes Dimensions. ISO 50
26、81:1977, Textiles Woven fabrics Determination of breaking strength and elongation (Strip method). ASTM G 53-88, Standard practice for operating light and water exposure apparatus (Fluorescent UV-condensation type) for exposure of non-metallic materials. 3 Definitions For the purpose of this standard
27、, the following definitions apply: NOTEOther terms used in the manufacture of sacks are defined in EN26590-1 for paper sacks and in EN26590-2 for sacks made of thermoplastic flexible film. Most of these terms can also be applied to sacks made of cotton/polyolefin fabric. 3.1 woven cotton/polyolefin
28、sack a container made of woven cotton/polyolefin fabric, closed at least at one end, possibly in combination with other flexible materials used for the liner, to provide the properties required for filling and the goods distribution chain NOTEHereafter where the word “sack” is used in the text of th
29、is European Standard, a sack made of cotton/polyolefin fabric is to be understood. 3.2 ply a tissue of woven cotton/polyolefin fabric, forming the walls of a sack 3.3 gusset a fold inserted in the longitudinal edge of a sack 4 General characteristics 4.1 Construction 4.1.1 The sack shall be made of
30、woven cotton/polyolefin fabric. The cotton yarns shall be in the weft direction, the polyolefin yarns shall be in the warp direction. 4.1.2 The sack shall be made of one ply or more plies and may be equipped with a liner in accordance with prEN1086. 4.1.3 The sack may be flat or gusseted. 4.1.4 The
31、empty sack, laid flat, shall have a rectangular shape. 4.1.5 The closure of the filled sack shall be designed to prevent leakage of the product during transport. 4.1.6 Materials other than natural materials used in the manufacture and closure of the sack (inner liner excluded) shall have a UV-resist
32、ance in accordance with5.7.3. These materials can be tested in the construction in which they are used in the sack. 4.2 Dimensions 4.2.1 The dimensions of the empty sack shall be chosen so that, if necessary, after filling the dimensions of the filled sack comply with the dimensions of the unit load
33、 as specified in ISO3676. 4.2.2 The dimensional tolerances of the sack should be agreed upon between the purchaser and the supplier.EN 769:1994 4 BSI 12-1999 4.2.3 The dimensions and the dimensional tolerances of the sack shall be recorded in the ordering documents. 4.2.4 The description of the dime
34、nsions, the method of measuring the dimensions and the dimensional designation of the sack shall be in accordance with EN26591-2. NOTEThough EN26591-2 is valid for sacks made of thermoplastic flexible film it can be applied to sacks made of cotton/polyolefin fabric. However for some forms of sacks m
35、ade of cotton/polyolefin fabric EN26591-2 cannot be applied. A third part of ISO6591 will be prepared by ISO/TC 122/SC2, Packaging Sacks. This third part will deal with sacks made of woven fabric. 4.3 Food compatibility Sacks which come in contact with foodstuffs shall meet the legal requirements of
36、 the CEN member states which are applicable to them. 5 Test methods and test requirements 5.1 Sampling 5.1.1 The sampling shall be done in accordance with EN27023. NOTETable1 of EN27023:1992 refers to the selection of units. Table2 of EN27023:1992 refers to the selection of sacks out of each selecte
37、d unit. 5.1.2 The sampling shall be done at the date the empty sacks are ready for dispatch by the supplier. 5.1.3 In case resampling is necessary it shall be done in accordance with EN27023. If, as a result of an accident during sampling or testing, resampling is necessary, a new sample shall be ta
38、ken following the procedure specified in EN27023. Selection may then however, be made from the same units as before unless agreed otherwise. If, for any other reason, resampling is necessary, the procedure followed shall follow the specifications of EN27023 as closely as possible. 5.2 Conditioning 5
39、.2.1 Before testing all samples shall be conditioned in accordance with EN22233:1992 condition G (temperature+23 C 2 C, relative humidity50% 5%). 5.2.2 The minimum period of conditioning of the samples shall be not less than8h. 5.2.3 The various tests as described shall be carried out in the same at
40、mospheric conditions as used for conditioning, see5.2.1, or, if not possible, the tests shall commence within10min after removing the samples from the conditioning atmosphere. 5.3 Surface identification If necessary the identification of the various surfaces of the filled sacks when testing shall be
41、 as given in EN22206. 5.4 Date of completion of the tests All tests shall be completed within four weeks after the date the empty sacks are ready for dispatch by the supplier. 5.5 Determination of the breaking strength The determination of the breaking strength of the material of the sack shall be c
42、arried out in accordance with ISO5081 using the conditioning requirements of5.2 of this European Standard. The obtained value will constitute the reference from which the acceptability of the UV-resistance test as defined in5.7 will be determined. 5.6 Drop test 5.6.1 Test method The drop test shall
43、be carried out in accordance with EN27965-1 using the constant drop height method. 5.6.2 Filling of the sacks The sacks shall be filled 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 filli
44、ng. The mass of the filling material shall be within 0,2% of that of the nominal mass of the intended contents of the sack. 5.6.3 Test procedure 5.6.3.1 Drop test sequence The drop test shall be carried out on three sacks and shall comprise the following sequence: 1) butt dropping; 2) flat dropping.
45、 5.6.3.2 Butt dropping The sack shall be dropped from a height of1,20m on the bottom of the sack. 5.6.3.3 Flat dropping The sack shall be dropped from a height of1,60m twice on one flat face and twice on the opposite flat face. 5.6.4 Criteria for passing the drop test After each drop there shall be
46、no rupture or loss of contents. A slight dischargee.g.from closures or stitch holes, upon impact shall not be considered a failure of the sack provided that no further leakage occurs after the sack has been raised clear of the ground.EN 769:1994 BSI 12-1999 5 5.7 UV-resistance test 5.7.1 Test method
47、 The determination of the influence of UV-radiation and weathering on the breaking strength of the cotton/polyolefin fabric shall be carried out in accordance with ASTMG53-88. 5.7.2 Test procedure The test shall be carried out with fluorescent UV-lamp type B. The duration of the test shall be144h (i
48、.e.6days). The test cycle shall be:8h at+60 C with UV-radiation alternating with 4hours at+50 C with condensation. 5.7.3 Criteria for passing the UV-resistance test After the test the breaking strength of the tested material shall be at least50% of the original breaking strength. 6 Marking The marki
49、ng of the sack with the suppliers identification is voluntary. 7 Test report The test report shall include a statement that all tests have been carried out in accordance with this European Standard and shall include at least the following information: a) name and address of the supplier; b) number of the contract or order reference; c) date, place and description of the sampling; d) description of the sacks in accordance with4.2.4 of this European Standard; e) description of the filling material
