GB2001444A - Measuring permeability of paper - Google Patents

Measuring permeability of paper

Info

Publication number
GB2001444A
GB2001444A GB7827980A GB7827980A GB2001444A GB 2001444 A GB2001444 A GB 2001444A GB 7827980 A GB7827980 A GB 7827980A GB 7827980 A GB7827980 A GB 7827980A GB 2001444 A GB2001444 A GB 2001444A
Authority
GB
United Kingdom
Prior art keywords
paper
flow
air
measuring
pressure differential
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7827980A
Other versions
GB2001444B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British American Tobacco Investments Ltd
Original Assignee
British American Tobacco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British American Tobacco Co Ltd filed Critical British American Tobacco Co Ltd
Priority to GB7827980A priority Critical patent/GB2001444B/en
Publication of GB2001444A publication Critical patent/GB2001444A/en
Application granted granted Critical
Publication of GB2001444B publication Critical patent/GB2001444B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082—Investigating permeability by forcing a fluid through a sample
    • G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/005—Treatment of cigarette paper
    • A24C5/007—Perforating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Volume Flow (AREA)

Abstract

An instrument for measuring the air permeability of cigarette paper, comprises a paper-clamping head 13, arranged to expose a fixed area of paper (shown dotted) to a flow of pressurised air from an air pump. A pressure meter 14 is arranged to measure the pressure differential across the paper and the air flow is controllable by a valve 2 to enable a predetermined pressure differential to be maintained. The air flow through the paper is permitted to take place via a selected one only of three flow-meters 10, 11, 12 arranged for measuring the flow rate in a low medium or high flow rate range respectively. The arrangement is such that the flow impedance downstream of the tapping point of the pressure transducer is negligible. <IMAGE>
GB7827980A 1977-07-01 1978-06-27 Instrument for measuring gas permeability Expired GB2001444B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7827980A GB2001444B (en) 1977-07-01 1978-06-27 Instrument for measuring gas permeability

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2762977 1977-07-01
GB7827980A GB2001444B (en) 1977-07-01 1978-06-27 Instrument for measuring gas permeability

Publications (2)

Publication Number Publication Date
GB2001444A true GB2001444A (en) 1979-01-31
GB2001444B GB2001444B (en) 1982-04-15

Family

ID=26258913

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7827980A Expired GB2001444B (en) 1977-07-01 1978-06-27 Instrument for measuring gas permeability

Country Status (1)

Country Link
GB (1) GB2001444B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443675A1 (en) * 1978-12-07 1980-07-04 Philip Morris Inc POROSITY MEASURING METHOD AND APPARATUS
DE3209735A1 (en) * 1981-03-18 1982-11-04 British-American Tobacco Co. Ltd., London AUTOMATIC DETERMINATION DEVICE FOR THE GAS FLOWING / PRESSURE DROP CHARACTERISTICS OF A GAS PERMEABLE MATERIAL
EP0096311A2 (en) * 1982-06-08 1983-12-21 Thomas Josef Heimbach GmbH & Co. Inspection device for the measurement of the permeability to air of textile material webs
US4471649A (en) * 1981-02-20 1984-09-18 British-American Tobacco Company Limited Permeability monitoring of sheet materials
GB2140163A (en) * 1983-05-17 1984-11-21 Coulter Electronics Porosimeter and methods of assessing porosity
GB2238134A (en) * 1989-11-13 1991-05-22 Secr Defence Fabric tester
CN112369654A (en) * 2020-10-29 2021-02-19 中国烟草总公司郑州烟草研究院 Method for eliminating system pressure difference of cigarette ventilation rate detection device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443675A1 (en) * 1978-12-07 1980-07-04 Philip Morris Inc POROSITY MEASURING METHOD AND APPARATUS
US4471649A (en) * 1981-02-20 1984-09-18 British-American Tobacco Company Limited Permeability monitoring of sheet materials
DE3209735A1 (en) * 1981-03-18 1982-11-04 British-American Tobacco Co. Ltd., London AUTOMATIC DETERMINATION DEVICE FOR THE GAS FLOWING / PRESSURE DROP CHARACTERISTICS OF A GAS PERMEABLE MATERIAL
EP0096311A2 (en) * 1982-06-08 1983-12-21 Thomas Josef Heimbach GmbH & Co. Inspection device for the measurement of the permeability to air of textile material webs
EP0096311A3 (en) * 1982-06-08 1984-10-03 Thomas Josef Heimbach Gmbh & Co. Inspection device for the measurement of the permeability to air of textile material webs
GB2140163A (en) * 1983-05-17 1984-11-21 Coulter Electronics Porosimeter and methods of assessing porosity
GB2238134A (en) * 1989-11-13 1991-05-22 Secr Defence Fabric tester
GB2238134B (en) * 1989-11-13 1993-06-23 Secr Defence Fabric tester
CN112369654A (en) * 2020-10-29 2021-02-19 中国烟草总公司郑州烟草研究院 Method for eliminating system pressure difference of cigarette ventilation rate detection device
CN112369654B (en) * 2020-10-29 2022-01-25 中国烟草总公司郑州烟草研究院 Differential pressure compensation elimination method of cigarette ventilation rate detection device

Also Published As

Publication number Publication date
GB2001444B (en) 1982-04-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee