1、CEN EN*26599-1 92 3404589 0040394 271 = EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 26599-1 November 1992 UDC 62 1.798.151-035.4r620.1 Descriptors: Packing, paper packaging, paper bags, conditioning, test, atmospheres English version Packaging - Sacks - Conditioning for testing - Part 1 : P
2、aper sacks (IS0 6599-1 : 1983) Emballages - Sacs - Conditionnement pour essais - Partie 1: Sacs en papier (IS0 6599-1 1983) Papierscke Packmittel - Scke - Klimatische Vorbehandlung fr die Prfung - %il 1 : (IS0 6599-1 : 1983) This European Standard was approved by CEN on 1992-10-30. CEN members are b
3、ound to comply with the CENKENELEC Internal Regulations which 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
4、Central Secretariat or to any CEN member. This European Standard 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
5、 as the official versions. CEN members are the national standards 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
6、 Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B- 1050 Brussels O 1992 Copyright reserved to CEN members Ref. No. EN 26599-1 : 1992 E CEN EN*Zb599-L 92 3404589 0040395 108 = Page 2 EN 26599-1 : 1992 Foreword In 1991, IS0 6599-1 : 1983 Packaging - Sa
7、cks - Conditioning for testing - Part 1 : Paper sacks was submitted to the CEN Primary Questionnaire procedure. Following the positive result of the CEN/CS Proposal IS0 6599-1 : 1983 was submitted to the Formal Vote. The result of the Formai Vote was positive. This European Standard shall be given t
8、he status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 1993, and conflicting national standards shall be withdrawn at the latest by May 1993. According to the Common CENKENELEC Rules, the following countries are bound to implement this Eu
9、ropean Standard : Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN EN*26599-1 92 3404589 0040396 044 Page 3 EN 26599-1 : 1992 Packaging - Sacks - Conditioning for testin
10、g - Part I : Paper sacks O Introduction The physical properties of paper are affected materially by its moisture content, which is dependent on the humidity and temperature of the surrounding atmosphere. In order that tests may be made on a paper sack in a defined physical state, it is brought into
11、equilibrium with an atmosphere of standardized temperature and relative humidity, and tested in that at- mosphere. 1 Scope This part of IS0 6599 specifies the conditioning atmospheres and the method for conditioning samples of intact, empty paper sacks before and during testing. If only conventional
12、 paper tests are to be carried out on the material of a sack, samples of this material shall be cut out and conditioned as specified in IS0 187. 2 Field of application This part of IS0 6599 applies to all types of empty paper sacks as specified in IS0 =/l. 3 References IS0 187, Paper and board - Con
13、ditioning of samples. IS0 554, Standard atmospheres for conditioning and/or testing - Specifications. IS0 669011, Packaging - Sacks - Vocabulary and types - Part 1 : Paper sacks. 1) 4 Principle Exposure of empty sacks to a conditioning atmosphere so that a state of temperature and moisture content e
14、quilibrium is reached between the sacks and this atmosphere. 5 Definitions For the purposes of this International Standard, the following definitions apply. 5.1 relative humidity (R.H.) : The ratio of the absolute humidity of the air to the humidity of air saturated with water vapour at the same tem
15、perature and pressure. NOTE - This ratio is usually expressed as a percentage. At ordinary atmospheric temperatures, this ratio is almost exactly equal to the ratio of the actual vapour pressure to the saturation vapour pressure at the same (dry bulb) temperature. 5.2 conditioning : The establishmen
16、t of a temperature and moisture content equilibrium between empty sacks and an at- mosphere of specified temperature and relative humidity. 6 Conditioning atmospheres The table indicates suitable conditioning atmospheres. Unless otherwise stated in the relevant specifications or test methods, or agr
17、eed between the interested parties, at- mosphere 23/50 shall be used. NOTE - The temperature and relative humidity conditions are those specified in IS0 187 and IS0 554. The tolerances quoted are the reduced or close tolerances specified in IS0 554. Table Relative Remarks 23 f 1 27 f 1 by climatic c
18、onditions at the test location 20165 65 f 2 11 At present at the stage of draft. CEN EN*26599-1 92 = 3404589 0040397 TBO Page 4 EN 26599-1 : 1992 7 Equipment 8.1 without barrier plies Minimum conditioning period for sacks 7.1 Room and measuring instrumentation The room in which conditioning is carri
19、ed out shall be provided with automatic equipment for bringing the air to standard con- ditions of temperature and relative humidity and for so cir- culating it that these conditions are uniformly maintained at all relevant points within it. It is recommended that a recording hygrometer, periodicall
20、y checked by a standard method (for ex- ample with calibrated wet and dry bulb thermometers), be kept in the test space for checking purposes. 7.2 Determination of temperature and relative humidity The relative humidity of the conditioning air shall be determined by a reliable method. Where a wet an
21、d dry bulb hygrometer is used, it shall be placed in an air current of the speed required by the tables used. This shall be not less than 2 m/s. When the thermometers of the hygrometer are at the same temperature, with the bulbs dry, the difference in reading shall not exceed 0.2 OC. 8 Procedure The
22、 sacks shall be so suspended that the conditioning air cir- culates freely to all their outer surfaces and, in the case of open mouth sacks, to as much of the inner surface of the innermost ply as possible. Sacks without barrier plies shall be kept in the conditioning at- mosphere for at least 24 h.
23、 8.2 Minimum conditioning period for sacks with barrier plies Sacks with one or more barrier plies shall be kept in the condi- tioning atmosphere for at least 7 days. NOTES 1 IS0 187 calls for preconditioning in an atmosphere of low relative humidity. Preconditioning is omitted here as with some sac
24、k construc- tions it may cause larger errors than those it reduces. 2 Where the sack isto be filled with a product after conditioning, the product may change the moisture content of the paper and a further period for moisture equilibration may be needed; this should be not less than the minimum conditioning periods given in 8.1 or 8.2. 9 Test report The test report shall include the following particulars a) a reference to this part of IS0 6599; b) the conditioning atmosphere used (23/50, n/65 or 20/65); c) the time taken to condition the sacks; d) any deviation from this part of IS0 6599.
