ISO-3550-1-1997.pdf
《ISO-3550-1-1997.pdf》由会员分享,可在线阅读,更多相关《ISO-3550-1-1997.pdf(14页珍藏版)》请在三一文库上搜索。
1、INTERNATIONAL STANDARD ANSI Internat Doe !5eC IS0 3550-l First edition 1997-09-01 Cigarettes - Determination of loss of tobacco from the ends - Part 1: Method using a rotating cylindrical cage Cigarettes - D a=4OOn; p-k; o=isocs; s=central Printed in Switzerland ii Copyright International Organizati
2、on for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:38:11 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 IS0 3550-l :I 997(E) Introduction The loss of tobacco from cigarette ends, wh
3、ich particularly affects short strands, is a nuisance for the industry as well as for the consumer. From this standpoint, the greater a cigarette s resistance to loss from its ends, the higher its quality. The measuring devices available are based on the rotation of a cigarette-containing device. Th
4、is International Standard describes two particular types of device. The first, described in this part of IS0 3550, comprises a rotating cylindrical cage through which tobacco is allowed to fall into a weighing vessel; the second, described in IS0 3550-2, uses a cubic box rotating about its main diag
5、onal axis. The first system principally permits determination of losses undergone by the cigarette during the manufacturing and packaging processes, and the second one losses undergone throughout the distribution network and in the smoker s pocket. The two methods are not mutually exclusive and othe
6、r acceptable methods exist which are based upon slightly different types of device. . . . III Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:38:11 MDTNo reproduction or netwo
7、rking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 3550-l :1997(E) Cigarettes - Determination of loss of tobacco from the ends - Part 1: Method using a rotating cylindrical cage 1 Scope This part of IS0 3550 specifies a method for the determination of loss of tobacco fro
8、m cigarette ends using a rotating cylindrical cage. It applies mainly to cigarettes sampled on the manufacturing site, before or after packaging. NOTE - A method for the determination of loss of tobacco from the ends, using a cubic rotating box (sismelatophore), is described in IS0 3550-2. 2 Normati
9、ve references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 3550. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 35
10、50 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 2971 :-I, Cigarettes and filters rods laser beam measuring device. - Determination of nomi
11、nal diameter - Method using the IS0 3402:199 7, Tobacco and tobacco products - Atmosphere for conditioning and testing. IS0 6488:-2, Tobacco - Determination of water content - Karl Fischer method. IS0 8243:1991, Cigarettes - Sampling. 3 Principle A test portion of a given number of cigarettes is pla
12、ced in a cylinder (cage) of elliptical cross section which is formed of closely spaced parallel rods. During the test the cage rotates around its horizontally positioned longitudinal axis and the cigarettes tumble in the cage. The amount of tobacco fallout from the open ends of the cigarettes is det
13、ermined. 1 2 To be published. (Revision of IS0 2971 :1987) To be published. (Revision of IS0 6488:1981) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:38:11 MDTNo reproductio
14、n or networking permitted without license from IHS -,-,- IS0 3550-l :1997(E) 0 IS0 The test conditions depend on the size and shape of the cage, the diameter and the spacing of the rods, the rotational speed of the cage, the number of revolutions per test, and the number of cigarettes per test porti
15、on which in turn depends on the diameter of the cigarettes. As a first result of the test, the mass mL of tobacco falling from the test portion is determined. From this mass and the physical dimensions of the test cigarette, the loss of tobacco per open end and per unit cross-section of open end is
16、determined. 4 Apparatus 4.1 Conditioning chamber, capable of controlling the enclosed atmosphere in accordance with the requirements of IS0 3402. 4.2 Cigarette ends loss tester, complying with the following requirements. a) The main part of the tester shall consist of a cage having an elliptical cro
17、ss section formed from a number of round stainless-steel rods. The spacing between adjacent rods shall be smaller than the diameter of the cigarettes to be tested but wide enough for any strands of tobacco lost from the test portion during a test to fall through. The positioning of the rods and thei
18、r spacing shall be as detailed in annex A. b) Bearings shall be provided at the centre point of each elliptical end face to enable the cage to be held horizontally and allowing it be rotated about its longitudinal axis. c) To permit tests to be carried out simultaneously on more than one test portio
19、n or on test portions from different samples, the cage may be equipped with one or more dividers along its length so as to create several test compartments. d) Each test compartment shall be equipped with one movable end plate in addition to its fixed end face, so that the effective length of the co
20、mpartment can be adjusted to match the length of the cigarettes under test. e) Each test compartment shall be provided with means of opening to allow for loading and unloading of its test portion and with a removable pan arranged beneath it to collect all of the tobacco which falls out from the ends
21、 of the cigarettes during the test. f) The tester shall be equipped with a drive system capable of rotating the cage and its contents at a rotational speed of 90 r/min f 1 r/min. The drive system shall be controlled by a preset counter that stops the rotation of the cage automatically when the speci
22、fied number of revolutions is reached. For normal testing, 270 revolutions is specified. See figure 1 for a schematic diagram of a tester. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04
23、/22/2007 20:38:11 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 Adjustable endplate -.-, -Fixed endplate IS0 3550-l :1997(E) Test cylindrical cage I f- Transparent enclosure Operational controls Preset counter Figure 1 - Practical tester layout 4.3 Device for the meas
24、urement of the diameter of the cigarettes, in accordance with IS0 2971. 4.4 Analytical balance, capable of weighing to an accuracy of + 0,000 1 g. 4.5 Ruler, with graduations in millimetres. 4.6 Counting trays (optional) for filling a defined number of cigarettes for use as the test portion. The dim
- 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 3550 1997
链接地址:https://www.31doc.com/p-3778598.html