BS-5381-6-1993 ISO-9512-1993.pdf
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1、BRITISH STANDARD BS 5381-6: 1993 ISO 9512:1993 Methods for Determination of physical properties of tobacco and tobacco products Part 6: Ventilation of cigarettes UDC 663.974:533.6.08 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:40:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5381-6:
2、1993 This British Standard, having been prepared under the direction of the Agriculture and Food Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 June 1993 BSI 10-1999 The following BSI references relate to the work on this standard: Co
3、mmittee reference AFC/11 Draft for comment 91/52769 DC ISBN 0 580 21842 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Agriculture and Food Standards Policy Committee (AFC/-) to Technical Committee AFC/11, upon which the following bod
4、ies were represented: Department of Trade and Industry (Laboratory of the Government Chemist) Tobacco Advisory Council Amendments issued since publication Amd. No.Date Comments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:40:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5381-6:1993 B
5、SI 10-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Principle2 5Standard conditions2 6Apparatus3 7Sampling3 8Procedure3 9Expression of results3 10Test report3 Annex A (informative) Bibliography5 Figure 1 Different degre
6、es of ventilation2 Figure 2 Calibration test piece for ventilation meter4 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:40:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5381-6:1993 ii BSI 10-1999 National foreword This Part of BS 5381 has been prepa
7、red under the direction of the Agriculture and Food Standards Policy Committee. It is identical with ISO 9512:1993 Cigarettes Determination of ventilation Definitions and measurement principles, published by the International Organization for Standardization (ISO), and in the preparation of which th
8、e United Kingdom played a full part. ISO 10185, which is referred to in the bibliography, is in preparation. It is intended to implement this in the UK by the publication of an identical British Standard. A British Standard does not purport to include all the necessary provisions of a contract. User
9、s of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard ISO 3402:1991BS 5743:1991 Specification for atmosphere for conditi
10、oning and testing tobacco and tobacco products (Identical) ISO 6565:1993BS 5381 Methods for determination of physical properties of tobacco and tobacco products Part 5:1993 Draw resistance of cigarettes and filter rods (Identical) ISO 8243:1991BS 6245 Sampling tobacco and tobacco products Part 3:199
11、2 Methods of sampling cigarettes (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be
12、indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:40:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5381-6:1993 BSI 10-19991 1 Scope This International Standard specifies a method for the determination of ventilation applicable to
13、 cigarettes. It applies in particular to the testing of cigarettes during manufacture. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated wer
14、e valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid Internation
15、al Standards. ISO 3402:1991, Tobacco and tobacco products Atmosphere for conditioning and testing. ISO 8243:1991, Cigarettes Sampling. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 ventilation any entry of air into an unlit cigarette other than t
16、hrough its front area 3.2 front area that end of a cigarette which is to be lit 3.3 dilution effect of ventilation on the smoke yield 3.4 ventilation air flow flow of air entering an unlit cigarette other than through the front area of the cigarette it is expressed in cubic centimetres per second 3.
17、5 total ventilation total amount of lateral air entering the cigarette other than through the front area of the cigarette 3.6 degree of ventilation ratio of the ventilation air flow to the total air flow leaving the cigarette at the mouth end, measured under the same pressure, temperature and hygrom
18、etric conditions. It is expressed as a percentage. See Figure 1b), Figure 1c) and Figure 1d). under standard conditions, the total ventilation air flow, (Q, is 17,5 cm3/s 0,15 cm3/s 3.7 components of total ventilation Air entering through the cigarette paper, and through the materials comprising and
19、 attaching the filter to the tobacco rod, contributing to the total ventilation. NOTE 1These components are illustrated in Figure 1b), Figure 1c) and Figure 1d). Total ventilation may be separated into main components and other components which can be useful in special cases. 3.7.1 Main components 3
20、.7.1.1 filter ventilation air entering the cigarette through the filter joining paper (tipping paper) between the covered part of the mouth end and the beginning of the tobacco rod. See Figure 1b). 3.7.1.2 paper ventilation air entering the cigarette through the envelope covering the whole length of
21、 the tobacco rod. See Figure 1b). 3.7.2 Examples of other components 3.7.2.1 butt ventilation air entering the cigarette between the covered part of the mouth end of the cigarette and the position defined by the butt length appropriate to the cigarette. See Figure 1c). 3.7.2.2 burnable tobacco rod v
22、entilation air entering the cigarette through its paper between the position defined by the butt length appropriate to the cigarette and the end of the cigarette which would be lit. See Figure 1c). 3.7.2.3 tipping-paper ventilation air entering the cigarette through the filter joining paper (tipping
23、 paper) between the covered part of the mouth end and the tobacco rod end of the tipping paper. See Figure 1d). 3.7.2.4 cigarette-paper ventilation air entering the cigarette through the cigarette paper between the end of cigarette which would be lit and the beginning of the tipping paper. See Figur
24、e 1d). Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 14:40:12 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5381-6:1993 2 BSI 10-1999 4 Principle Air is drawn in the standard smoking direction through an unlit cigarette at a constant flow. The amount leaving the mouth end is measured and th
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