《BS-ISO-2965-2009.pdf》由会员分享,可在线阅读,更多相关《BS-ISO-2965-2009.pdf(38页珍藏版)》请在三一文库上搜索。
1、BS ISO 2965:2009 ICS 65.160 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Materials used as cigarette papers, filter plug wrap and filter joining paper, including materials having a discrete or oriented permeable zone and materials with bands of differing pe
2、rmeability Determination of air permeability Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2009 BSI 2009 ISBN 978 0 580 56370 6 Amendments/cor
3、rigenda issued since publication DateComments BS ISO 2965:2009 National foreword This British Standard is the UK implementation of ISO 2965:2009. It supersedes BS 5381-4:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee AW/40, Tobacco and tobacco p
4、roducts. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer imm
5、unity from legal obligations. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 Reference number ISO 2965:2009(E) ISO 2009 INTERNATIONAL STANDARD ISO 2965 Third edition 2009-05-15 Materials used as cigarette papers, filter plug wrap and filte
6、r joining paper, including materials having a discrete or oriented permeable zone and materials with bands of differing permeability Determination of air permeability Matriaux utiliss comme papier cigarettes, pour le gainage des filtres et comme papier manchette, y compris les matriaux possdant une
7、zone permable discrte ou oriente et les matriaux bandes de permabilit diverses Dtermination de la permabilit lair Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 ISO 2965:2009(E) PDF disclaimer This PDF file may contain embedded typefaces.
8、In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing A
9、dobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized f
10、or printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2009 All rights reserved. Unless o
11、therwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyr
12、ight office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reserved Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 ISO
13、2965:2009(E) ISO 2009 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 1 4 Principle. 2 5 Apparatus 4 6 Sampling 5 7 Procedure 5 7.1 General. 5 7.2 Leak check of the test piece holder 5 7.3 Preparation of test pieces 5 7.
14、4 Calibration . 5 7.5 Insertion of a test piece 6 7.6 Measurement. 7 8 Expression of results . 8 9 Precision 9 9.1 Repeatability 9 9.2 Reproducibility 9 9.3 Results of an international collaborative study (Study 1) 9 9.4 Statistical discussion of r and R results for Study 1. 10 9.5 Results of an int
15、ernational collaborative study (Study 2) 11 9.6 Statistical discussion of r and R results for Study 2. 12 10 Test report . 12 Annex A (normative) Leak testing of test piece holder 14 Annex B (normative) Calibration of air permeability standards and air permeability measuring instruments . 16 Annex C
16、 (informative) Determination of relevant surface leakage of test piece in the test piece holder. 20 Annex D (informative) Flow of air through porous materials 22 Annex E (informative) Compensation of calibration standards 24 Bibliography. 27 Licensed CopyChinese University of Hong Kong, 13/06/2009 0
17、8:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 ISO 2965:2009(E) iv ISO 2009 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally c
18、arried out through ISO 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. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the wor
19、k. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare Inter
20、national Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of th
21、e elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 2965 was prepared by Technical Committee ISO/TC 126, Tobacco and tobacco products, Subcommittee SC 1, Physical and dimensional tests. This third editi
22、on cancels and replaces the second edition (ISO 2965:1997) which has been technically revised. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 ISO 2965:2009(E) ISO 2009 All rights reserved v Introduction Measurements of air permeability of
23、materials used as cigarette papers have been made for many years. The methods have required development and change because of the changing nature of the paper products and changes in the magnitude of their air permeability. This method has been developed with the technical resources of CORESTA (Coop
24、erative Centre for Research Relative to Tobacco). Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 INTERNATIONAL STANDARD ISO 2965:20
25、09(E) ISO 2009 All rights reserved 1 Materials used as cigarette papers, filter plug wrap and filter joining paper, including materials having a discrete or oriented permeable zone and materials with bands of differing permeability Determination of air permeability 1 Scope This International Standar
26、d specifies a method for the determination of air permeability (AP). It is applicable to materials used as cigarette papers, filter plug wrap and filter joining paper, including materials having an oriented permeable zone or discrete permeable zones where the measured permeability is in excess of 10
27、 cm3.(min1.cm2) at 1 kPa. In addition, it is applicable to banded cigarette papers, with bands of width W 4 mm. NOTE For an estimate of the air permeability of materials outside the scope of this International Standard, see Note 2 in 5.1.2 and Note 3 in 7.6.1. 2 Normative references The following re
28、ferenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 187, Paper, board and pulps Standard atmosphere for condition
29、ing and testing and procedure for monitoring the atmosphere and conditioning of samples ISO 3402, Tobacco and tobacco products Atmosphere for conditioning and testing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 air permeability AP flow of
30、 air, measured in cubic centimetres per minute, passing through 1 cm2 surface of the test piece at a measuring pressure of 1,00 kPa NOTE The air permeability units are cm3(min1cm2) at 1 kPa. 3.2 measuring pressure difference in pressure across the two faces of the test piece during the measurement L
31、icensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 ISO 2965:2009(E) 2 ISO 2009 All rights reserved 3.3 leakage air flow unintentionally aspirated from the surrounding atmosphere or escaping into it through the sealing surface of the test piece
32、holder and elsewhere 3.4 paper with uniformly distributed permeability standard paper paper with natural air permeability only 3.5 paper with oriented permeable zone paper that has a continuous zone of higher air permeability obtained through perforation 3.6 paper with discrete permeable zone paper
33、that has higher air permeability obtained through perforation in discrete areas 3.7 banded paper paper with bands of different air permeability NOTE Papers of this type normally have bands with permeability significantly lower than that of the base paper. 3.8 special paper paper with modified air pe
34、rmeability NOTE Papers of this type include those defined in paragraphs 3.5, 3.6 and 3.7. 4 Principle A test piece is held in a suitable device. A pressure difference is applied across the test piece. The resultant flow of air through the test piece is measured. The principle of measurement is illus
35、trated in Figure 1. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 ISO 2965:2009(E) ISO 2009 All rights reserved 3 Key 1 air stream 5 inner surface 2 perforated zone (if present) 6 outer surface 3 test piece 7 air stream 4 test surface of
36、area (2 cm2) a Pressure difference. c Low pressure. b High pressure. d Direction of air flow. Figure 1 Principle of measurement The air flow through the test piece may be produced by applying a positive or negative pressure to one side of the test piece. The direction of air flow through the test pi
37、ece shall be that which would occur when the sample is used in the finished product, where known, i.e. from the outside face towards the inside face. If the air flow is produced by a positive pressure, the apparatus used should incorporate a filter which protects the test sample from contamination b
38、y oil, water and particles. NOTE 1 With certain materials, the flow through the test piece can exhibit a non-linear relationship with the applied pressure drop. Thus the air flow through the test piece is determined at two pressure differences to establish whether the flow/pressure relationship acro
39、ss the paper is linear or non-linear. If it is non-linear, a second measurement of air flow is recorded at 0,25 kPa to fully characterize the material. NOTE 2 Depending upon whether the volumetric air flow rate is measured up-stream or down-stream of the test piece, a difference of approximately 1 %
40、 of the flow rate can exist either side of the theoretical value at the centre of the test piece. Licensed CopyChinese University of Hong Kong, 13/06/2009 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 ISO 2965:2009(E) 4 ISO 2009 All rights reserved 5 Apparatus 5.1 Test piece holder, for clampin
41、g the test piece, free from leaks. 5.1.1 For papers with uniformly distributed permeability and those with oriented or discrete permeable zones: the test piece holder has a rectangular surface area of 2,00 cm2 0,02 cm2 with corner radii no greater than 0,1 cm. The long side, L, shall have a length o
42、f 2,000 cm 0,005 cm (see Figure 2). 5.1.2 For bands of differing permeability: the test piece holder has a rectangular surface area of 0,30 cm2 0,01 cm2. The short side shall have a length of 2,00 mm 0,05 mm see 7.5.6 and Figure 3 d). NOTE 1 The positioning of the test piece holder on the test piece
43、 differs for different types of papers (see 7.5 and Figures 2 and 3). NOTE 2 An estimate of the air permeability of other speciality papers, outside the scope of this International Standard, may be required. In this case, specialized test piece holders with different surface areas might be necessary
44、. Key 1 test piece 2 measurement surface area of test piece holder L is the long side of the test surface (see 5.1.1) W is the width of the test surface a Centreline of test piece. Figure 2 Positioning of test pieces for materials with uniformly distributed permeability 5.2 Pneumatic controller, to
45、produce an air flow at a given but adjustable pressure difference between the two mating faces of the test piece holder. 5.3 Pressure gauge, suitable for measuring pressure differences to at least 0,001 kPa, having a relative error of no more than 2 % of the measured value within the measuring range
46、. 5.4 Flow meter, suitable for measuring the air flow with a relative error no greater than 5 % of the measured value within the measuring range. 5.5 Conditioning enclosure, capable of maintaining the conditions given in ISO 187 (but see 7.3). Licensed CopyChinese University of Hong Kong, 13/06/2009
47、 08:32, Uncontrolled Copy, (c) BSI BS ISO 2965:2009 ISO 2965:2009(E) ISO 2009 All rights reserved 5 6 Sampling Take a sample that is representative, on a statistical basis, of the population to be characterized. Samples shall be free of visible defects and creases that may impair measurement perform
48、ance. 7 Procedure 7.1 General Since the pressure versus flow relationship of many papers is not linear, this procedure should be followed closely to allow proper comparison of results. If it is necessary to deviate from this procedure in any way (for example, to use a non-standard size of test piece
49、 holder or to modify the positioning of the test piece holder, due to sample dimensions) then this shall be noted in the Test Report see 7.5 and 10 d). 7.2 Leak check of the test piece holder Follow the procedure given in Annex A. Perform a leak check daily, prior to use. Air leaks between the mating faces of the test piece holder shall not be greater than 2,0 cm3.min1. Some users require determination of the effect of surface leakage through particular papers that contribute to the measure
链接地址:https://www.31doc.com/p-3747138.html