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EP0317399A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Microporous membrane and method of preparing by irradiation on both sides

Assignee: Centre National de la Recherche Scientifique
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Filing: 1988-11-10
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Granted: —
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Expires: 2008-11-10
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Abstract

Abstract Translated from French Membrane microporeuse obtenue par irradiation et attaque chimique et procédé d'obtention. On effectue une première irradiation par des particules d'énergie insuffisante pour traverser la membrane (5), et une seconde irradiation, à partir de l'autre face (26) de la membrane (5), de particules également non débouchantes et dont les trajectoires entrent en contact avec celles des autres particules. Une attaque chimique crée des pores (respectivement 33 et 34) dont certains débouchent dans d'autres pores produits au cours de l'autre irradiation. Comme le pore le plus fin détermine les propriétés filtrantes, la sélectivité de cette membrane est très bonne. Application aux industries de la filtraton. Microporous membrane obtained by irradiation and chemical attack and process for obtaining it. A first irradiation is carried out with particles of insufficient energy to pass through the membrane (5), and a second irradiation, from the other face (26) of the membrane (5), of particles also not emerging and whose trajectories come into contact with those of other particles. A chemical attack creates pores (33 and 34 respectively), some of which open into other pores produced during the other irradiation. As the finest pore determines the filtering properties, the selectivity of this membrane is very good. Application to the filtration industries.

Inventors

  • 👤 Marcel Toulemonde
  • 👤 Emmanuel Balanzat

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 08:42
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/26; B26F1/31; B01; B01D; B01D67/00; B01D67/0002; B01D67/0023; B01D67/0032; B01D69/00; B01D69/02

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References Cited (Backward Citations)

US2345080A Cited
DE1436322B1 Cited
US3852134A Cited
GB1375204A Cited
WO1987005850A1 Cited

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