Method of making mineral fiber insulation batt impregnated...

B - Operations – Transporting – 32 – B

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B32B 17/04 (2006.01) B05B 7/08 (2006.01) B05B 7/12 (2006.01) B05C 5/02 (2006.01) B29B 15/10 (2006.01) B29B 15/12 (2006.01) B29C 47/02 (2006.01) B29C 67/24 (2006.01) B29C 70/50 (2006.01) B32B 5/26 (2006.01) B32B 7/04 (2006.01) B32B 27/12 (2006.01) D04H 1/64 (2006.01) D04H 13/00 (2006.01) E04B 1/76 (2006.01) E04B 1/78 (2006.01) F16L 59/02 (2006.01)

Patent

CA 2211309

A method of manufacturing/making mineral fiber (e.g. fiberglass) thermal insulation batt is disclosed wherein a base mineral fiber layer is impregnated with a two-layer layering system so as to produce a batt which is substantially vapor impermeable with a perm vapor rating less than about one. The first layer of the layering system is of a low melt material while the second layer is of a high melt material, the first layer being sandwiched between the base insulating layer and the second layer, and functioning to bond the layering system to the base. In certain embodiments, the first layer includes quick blooming ethyl vinyl acetate (e.g. from about 10-25% by weight) and a low density (e.g. 22-26 lbs. per cubic foot) polyethylene, and the second layer includes high density (e.g. 28-38 lbs. per cubic foot) polyethylene. The resulting insulation batt is vapor impermeable, less susceptible to cold-crack, easier to manufacture, fire retardant, more durable, and easier to handle.

On divulgue une méthode de fabrication de nattes de fibres minérales (p. ex. Fibre de verre) pour l'isolation thermique dans laquelle où une couche de fibres minérales de base est imprégnée d'un système de stratification à deux couches de manière à produire une natte qui est substantiellement imperméable à la vapeur, son indice de perméabilité à la vapeur étant inférieur à environ un. La première couche du système de stratification est faite d'une matière à faible point de fusion alors que la seconde couche est faite d'une matière à haut point de fusion, la première couche étant intercalée entre la couche isolante de base et la seconde couche, et servant à lier le système de stratification à la base. Dans certaines applications, la première couche comprend de l'acétate d'éthylvinyle à expansion rapide (p. ex. d'environ 10-25 % en poids) et un polyéthylène de faible densité (p. ex. 22-26 lb par pied cube), et la seconde couche comprend un polyéthylène de haute densité (p. ex. 28-38 lb par pied cube). La natte insolante ainsi obtenue est imperméable à la vapeur, est moins sujette à la fissuration à froid, est plus facile à fabriquer, est ignifuge, est plus durable et est plus facile à manipuler.

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