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Method and apparatus for the plasma processing of filter material

一种等离子、滤嘴的技术，应用在吸烟制品例如香烟的滤嘴领域，能够解决残留、污染等问题

Inactive Publication Date: 2013-12-18
BRITISH AMERICAN TOBACCO (INVESMENTS) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One of the disadvantages of using chemical vapor deposition is that it usually involves the use of reagents which can lead to contamination or carryover issues

Method used

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  • Method and apparatus for the plasma processing of filter material
  • Method and apparatus for the plasma processing of filter material
  • Method and apparatus for the plasma processing of filter material

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Embodiment Construction

[0025] plasma treatment process

[0026] Low-pressure non-equilibrium cold plasmas (eg, room-temperature plasmas rather than hot plasmas at thousands of degrees) provide an effective tool for modifying the surface composition and topography of materials without altering their bulk properties. Plasma treatment processes are well known in a variety of different industries, including microelectronics, semiconductors, food and medical packaging, automotive, corrosion protection and biomaterials. The three main classifications of plasma processing processes that can be defined are: plasma etching, the ablation of materials by generating volatile products after the interaction of materials with active species generated in the plasma; plasma enhanced chemical vapor deposition (PE-DVD), the deposition of thin (5-1000nm) organic or inorganic coatings; and plasma treatment, which uses glow discharge to graft functional groups on the material. The grafted functional groups may be partly...

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Abstract

One embodiment of the invention provides a method of manufacturing a filter material such as carbon suitable for use in a smoking article. The method includes modifying the filtration properties of the filter by altering the surface of the filter material. The surface alteration is performed by plasma processing and can be used, for example, to increase the acidic or basic properties of the surface. Another embodiment of the invention provides a filter produced by such a method.

Description

[0001] This application is a PCT application that entered China on September 30, 2010, with the national application number: 200980112085.X, and the invention title "Method and device for plasma treatment process of filter material" (International filing date: 2009 March 11, 2009; International Application No.: PCT / EP2009 / 052839). technical field [0002] The present invention relates to filters, including filters for smoking articles such as cigarettes. Background technique [0003] Most cigarettes include filters for absorbing smoke and accumulating particles of smoke constituents. The main component of most filters is a bundle of cellulose acetate wrapped in filter paper. This material is usually made from cotton or tree pulp as a synthetic fiber. Plasticizers such as glycerol acetate (triacetate) can be used to help hold the fibers together. [0004] Cigarette filters must strike a balance between removing undesirable components from cigarette smoke while maintaining ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24D3/16B01J19/08
CPCA24D3/163B01D39/18B01D39/2055B01D39/2058B01D2239/0421B01D2239/0478B01D2239/0485B01D2239/10C01B32/00A24D3/10
Inventor M.莫拉R.达戈斯蒂诺P.费维亚N.德维特罗F.弗拉卡西
Owner BRITISH AMERICAN TOBACCO (INVESMENTS) LTD
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