Dedusted fire-retardant cellulose material

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 3/20 (2006.01) B05D 3/04 (2006.01)

Patent

CA 2742504

A method of producing a low-dust, fire retardant cellulose fiber material useful in producing insulation and other such products is provided. A liquid, comprising a solvent and at least one fire-retarding material soluble in that solvent, is applied to a cellulose source material, and the liquid is allowed to permeate into the cellulose source material. The liquid permeated material is dried to remove the solvent while the fire-retardant material remains in the cellulose source material. The dried fire-retardant cellulose source material is reduced in size and then de-dusted to produce a low to no dust, fire-retardant cellulose fiber material that has functionally equivalent fire-retardant properties as the dried fire- retardant cellulose source material before de-dusting.

La présente invention concerne un procédé permettant de produire un matériau à base de fibre de cellulose ignifuge dégageant peu de poussières, ledit matériau étant utile dans la fabrication de produits isolants et autres produits de ce genre. On applique un liquide, contenant un solvant et au moins une substance ignifugeante soluble dans ce solvant, sur une matière source de cellulose, et on laisse le liquide perméer dans la matière source de cellulose. On sèche la matière dans laquelle a perméé le liquide, afin d'éliminer le solvant, tandis que la substance ignifugeante reste dans la matière source de cellulose. On réduit la taille de la matière source de cellulose ignifugée séchée puis on la dépoussière pour produire un matériau à base de fibre de cellulose ignifuge dégageant peu ou pas de poussière, qui a des propriétés de résistance au feu fonctionnellement équivalentes à la matière source de cellulose ignifugée séchée avant dépoussiérage.

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