Multiphase fiber materials and compositions, methods of...

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/34 (2006.01) C08L 77/00 (2006.01)

Patent

CA 2546346

A pre-fiber composition is disclosed herein that includes: a) a first fiber constituent having a first melting point; b) a second fiber constituent having a second melting point; and c) a gelling agent that solvates at least one of the first fiber constituent or the second fiber constituent, wherein the gelling agent significantly reduces co-polymerization of either of the constituents in the composition. A fiber is also disclosed herein that includes: a) at least two amide-based polymers, each having a melting point, wherein the melting point of one amide-based polymer is dissimilar to the melting point of a second amide-based polymer; and b) a gelling agent that is compatible with at least one of the amide-based polymers, wherein the fiber comprises two differentiatable melting points that are substantially similar to the melting points of each of the amide-based polymers. A method of producing a pre-fiber composition is disclosed herein that includes: a) providing a first fiber constituent having a first melting point; b) providing a second fiber constituent having a second melting point, wherein the first melting point and the second melting point are dissimilar; c) providing at least one gelling agent; and d) mixing the first constituent, the second constituent and the at least one gelling agent such that there is sufficient viscosity and sufficient melt strength in the composition so that it can be spun into a fiber and such that the first melting point and the second melting point in the fiber are substantially similar to their original values before mixing.

L'invention concerne une composition de pré-fibre laquelle contient: a) un premier constituant fibreux présentant un premier point de fusion; b) un second constituant fibreux ayant un second point de fusion; et c) un agent gélifiant solvatant au moins un des premier et second constituants fibreux, l'agent gélifiant réduisant de manière significative la copolymérisation de l'un ou l'autre des constituants de la composition. L'invention concerne également une fibre laquelle contient: a) au moins deux polymères à base amide, chacun ayant un point de fusion, le point de fusion d'un polymère à base amide étant différent du point de fusion d'un second polymère à base amide; et c) un agent gélifiant compatible avec au moins un des polymères à base amide, la fibre présente deux points de fusion différenciables qui sont sensiblement similaires aux points de fusion de chacun des polymères à base amide. L'invention concerne également un procédé de production d'une composition de pré-fibre consistant: a) à produire un premier constituant fibreux ayant un premier point de fusion; b) à produire un second constituant fibreux ayant un second point de fusion, le premier point de fusion et le second point de fusion étant différents; c) à produire au moins un agent gélifiant; et d) à mélanger le premier constituant, le second constituant ainsi qu'au moins un agent gélifiant de telle sorte qu'existent une viscosité suffisante et une résistance en fusion suffisante dans la composition de manière que celle-ci peut être filée en une fibre et de telle sorte que le premier point de fusion et le second point de fusion de la fibre sont sensiblement similaires à leur valeurs d'origine avant mélange.

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