Machine and method of making a filter

D - Textiles – Paper – 04 – H

Patent

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D04H 1/732 (2012.01) B01D 15/00 (2006.01) B01D 39/14 (2006.01) B01D 53/00 (2006.01) B01J 20/00 (2006.01) D04H 1/00 (2006.01) D04H 1/58 (2012.01)

Patent

CA 2222122

A random fiber web (W) with a uniformly distributed sorbent particles (P) is described. In order to provide a uniform distribution of the sorbent particles (P) within the random fiber web (W), it is proposed to combine the sorbent particles (P) and fibers (F) in the web (W) during its formation. The fibers (F) are joined in such a way that the sorbent particles (P) are secured within the web (W) in a uniform distribution. The fibers (F) are joined with the use of dry adhesives, UV hardenable adhesives, low melting fibers, spraying a liquid adhesive or needling. The invention extends to a machine for making random fiber webs (W) and a method of making a thin bed filter for removing odors and particulates.

La présente invention concerne un voile de fibres (W) à répartition aléatoire comportant des particules sorbantes (P) uniformément distribuées. Pour assurer la distribution uniforme des particules sorbantes (P) dans le voile de fibres (W) à répartition aléatoire, le procédé consiste, pendant la formation du voile, à combiner dans le voile (W) les particules sorbantes (P) et les fibres (F). Ces fibres (F) sont reliées entre elles de façon à emprisonner les particules sorbantes (P) en répartition uniforme dans le voile (W). La liaison entre fibres (F) est obtenue par des adhésifs, des fibres à point de fusion bas ou par une opération d'aiguilletage. L'invention concerne également une machine de fabrication de voiles de fibres (W) à répartition aléatoire, constituée d'un mécanisme d'avant-train briseur (20), d'un mécanisme de cardage (24) des fibres, d'un appareil fournissant les fibres à l'avant-train briseur (20), d'un conduit à effet venturi (22), d'une source de particules sorbantes (P), et d'un condenseur de voile (14).

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