ISO-7965-1-1984.pdf
《ISO-7965-1-1984.pdf》由会员分享,可在线阅读,更多相关《ISO-7965-1-1984.pdf(10页珍藏版)》请在三一文库上搜索。
1、International Standard 7965/ 1 ,NTERNAT,ONAL ORGANIZATION FOR STANOARDIZATIONME)YHAPOflHAfl OPTAHblSAUblA fl0 CTAH/lAPTH3AUMMORGANlSATlON INTERNATIONALE DE NORMALISATION Packaging - Sacks - Drop test - Part 1: Paper sacks Emballages - Sacs - Essai de chute - Partie I: Sacs en papier First edition -
2、1984-12-15 iii e UDC 621.798.15 : 676.821 : 620.165.72 Ref. No. IS0 7965/l-1984 (E) Ei-? ; ;i Descriptors : packing, paper packaging, bags, tests, drop tests, test equipment. E is Price based on 8 pages Foreword IS0 (the International Organization for Standardization) is a worldwide federation of na
3、tional standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical 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. Intern
4、ational organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They
5、are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting. International Standard IS0 7965/l was prepared by Technical Committee ISO/TC 122, Packaging. 0 International Organization for Standardization, 1984 0 Printed in Switzerland INTERNATIONAL STAN
6、DARD IS0 7965/l-1984 (El Packaging - Sacks - Drop test - Part 1: Paper sacks 1 Scope and field of application This part of IS0 7965 specifies a method of vertical impact testing on a filled paper sack by dropping. It may be performed either as a single test to investigate the effects of vertical im-
7、 pact or as 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 IS0 7965 specifies the testing procedure and how the results of tests should be presented. It is based on IS0 2249, but is specifi
8、cally related to paper sacks. 2 References IS0 2248, Packaging - Complete, filled transport packages - Part 4: Vertical impact test by dropping. IS0 6599/l, Packaging - Sacks - Conditioning for testing - Part 7: Paper sacks. IS0 7023, Packaging - Sacks - Method of sampling empty sacks for testing. 3
9、 Principle The filled sack is raised above a rigid plane surface and released to strike this surface after a free fall, the atmospheric con- ditions, the height of drop and the position of the package be- ing set in advance. 4 Apparatus The apparatus necessary to carry out the drop test shall includ
10、e the following (examples are shown in annex A) : 4.1 lifting arrangment, which will not damage the sack during either lifting or release. 4.2 means of holding the sack prior to release in its predetermined position. 1) 4.3 release mechanism, to release the sack in such a way that its fall is not ob
11、structed 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 non-deformable under test conditions. NOTE - In normal circumstances the impact surface provided should be: - of one piece, w
12、ith a mass at least 50 times that of the heaviest sack to be tested; - flat, such that no two points on its surface differ in level by more than 2 mm; - rigid, such that it will not be deformed by more than 0.1 mm when an area of 100 mm;! is loaded statically with 10 kg anywhere on the surface; - su
13、fficiently 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 accordance with the procedure in IS0 7023. 6 Conditioning The empty s
14、acks shall be conditioned in accordance with the procedure in IS0 6599/l, using one of the designated con- ditioning atmospheres. 7 Procedure The various tests as described shall be carried out in the same atmospheric conditions as used for conditioning (see clause 6) or, if not, the tests shall com
15、mence within 3 min of removing the sack from the conditioning atmosphere. 11 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 must be included in the test report. 1 IS0 7965/l-19
16、84 (El 7.1 Filling 7.3 Test methods Fill the sacks with the intended commodity but, 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 filling material shall be within + 0,2 % of that of the nominal mass
17、 of the intended contents of the sack. 7.3.1 Progressive drop height method This method may be used for flat, side and butt drop testing of paper sacks. Position the sack on the trap door of the apparatus before the drop. 7.3.1.1 Flat and side drop test The drop height, h, is given by the formula 7.
18、2 Dropping h = 0,85 + (n-l) x 0,151 Place the sack under test centrally on the platform which is then raised to a height that is within f 2 % of the predeter- mined drop height as defined by the distance between the lowest point of the sack at the time of release and the nearest point of the impact
19、surface. where 0,85 is the value, in metres, of the initial drop height (ho); n is the number of drops; 0,15 is the value, in metres, of the increment (Ah). The sack shall be released from its predetermined position within the following tolerances: - for drops on any side or edge: there shall be no
20、vari- ation of mpre than 2O between the impacting surface of the sack, and the horizontal surface; - for edge or corner drops: the angle between a pre- scribed surface of the sack and the horizontal surface shall be 45 + 5O; - the velocity at impact shall be within _+ 1 % of that which would be achi
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ISO 7965 1984
链接地址:https://www.31doc.com/p-3782708.html