Granular-type polytetrafluoroethylene dispersions and fused...

Details Granular-type polytetrafluoroethylene dispersions and fused... Granular-type polytetrafluoroethylene dispersions and fused...

C - Chemistry, Metallurgy

08

J

C08J 9/24 (2006.01) B01D 39/08 (2006.01) B01D 39/16 (2006.01) B01D 67/00 (2006.01) B01D 71/36 (2006.01) C08J 3/03 (2006.01) C08L 27/18 (2006.01)

Patent

CA 2250456

An aqueous dispersion of granular PTFE particles and modified fine powder particles is sprayed or cast to form a sheet. The sheet is then dried and the particles fused together to form an open network of fused interconnected particles that define a tortuous network of voids through the sheet. It has been found that when the modified fine powder-type PTFE is present, the resulting fused sheets are stronger than when the modified PTFE is not present.

Une dispersion aqueuse de particules granuleuses de PTFE et de particules modifiées de poudre fine est pulvérisée ou coulée pour former une feuille. Cette feuille est ensuite séchée et les particules fondues interconnectées, la feuille étant traversée par des trous formant un réseau tortueux. Il a été démontré qu'en présence de PTFE avec poudre fine modifiée, les feuilles fondues obtenues sont plus résistantes qu'en son absence.

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