Method and apparatus for manufacturing fiber-reinforced,...

B - Operations – Transporting – 29 – C

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B29C 44/34 (2006.01) C08J 5/06 (2006.01) C08J 9/228 (2006.01) C08K 7/02 (2006.01) C08L 3/02 (2006.01)

Patent

CA 2267225

A method for manufacturing products with a blown foamy structure, starting from a mass compris-ing at least natural polymers such as starch and fibers, in particular natural fibers, wherein the mass (M, S) is passed under pressure into or through a mould (23, 63) and the mass (M, S) is heated in the mould (23, 63) in a manner such as to give rise to gelatinization and cross-linking of the natural polymers, with the fibers extending through the product, while the mass prior to the introduction into the mould has a temper-ature which is below the gelatinization temperature and in the mould is brought at least to the baking temperature.

L'invention concerne un procédé destiné à fabriquer des produits dotés d'une structure mousseuse soufflée, à partir d'une masse comprenant au moins des polymères naturels tels de l'amidon et des fibres, en particulier des fibres naturelles. Selon ce procédé, la masse (M, S) est passée sous pression dans ou à travers un moule (23, 63), et cette masse (M, S) est chauffée dans le moule (23, 63) de façon à provoquer une gélatinisation et une réticulation des polymères naturels, les fibres d'étendant à travers le produit; la température de la masse avant son introduction dans le moule est inférieure à la température de gélatinisation et elle est portée, lorsque la masse est dans le moule, au moins à la température de cuisson.

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