Composite exothermic non-woven material and methods for the...

C - Chemistry – Metallurgy – 09 – K

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Details

C09K 5/16 (2006.01) A61F 7/03 (2006.01) C09K 5/18 (2006.01) D04H 1/42 (2006.01) D04H 1/56 (2006.01) D04H 3/16 (2006.01)

Patent

CA 2382064

The present invention relates to a composite exothermic non-woven material from polymeric fiber with a filler capable of producing heat when coming into contact with air, whereby the ratio between the polymer and the filler (in weight) is comprised between 1:1 and 1:4, preferably between 1:3 and 1:4. A mixture of metallized finely dispersed powder iron can be used as a filler, whereby said powder iron has a grain size of 20 micrometers or less. Such filler can also contain activated carbon and/or vermiculite and/or water, for example, in the following proportions: metallized powder iron 0.717 gr, activated carbon 0.151 gr, vermiculite 0.026 gr and water 0.106 gr. The polymeric fibers can be an acrylnitrile and methylacrylate copolymer, with a proportion, in weight per cent, of 95:5. The invention also relates to a method for production of such exothermic composite non-woven material and to a method for activating said non-woven material.

La présente invention concerne un non-tissé exothermique composite à base d'une fibre polymère avec une charge capable de produire de la chaleur au contact de l'air, avec des proportions entre le polymère et la charge (en poids) allant de 1:1 à 1:4 et comprises de préférence entre 1:3 et 1:4. On peut utiliser en tant que charge un mélange de fer métallisé en poudre fortement dispersé, avec une granulométrie inférieure ou égale à 20 micromètres, la charge pouvant contenir également du charbon activé et/ou de la vermiculite et/ou de l'eau, par exemple, dans les proportions suivantes: fer métallisé en poudre 0,717 g, charbon activé 0,151 g, vermiculite 0,026 g, eau 0,106 g. Les fibres polymères peuvent se présenter comme un copolymère d'acrylnitrile et de méthylacrylate, avec un rapport en pour cent en poids égal à 95:5. L'invention concerne également un procédé pour produire ce non-tissé composite exothermique et un procédé pour activer ce non-tissé.

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