20-01-2022 дата публикации
Номер: US20220016807A1
Принадлежит:
Arkema France
Manufacture of a pre-impregnated fibrous material which contains continuous fibers and a thermoplastic matrix, the material being made as a plurality of unidirectional parallel ribbons or sheets, and the method involving a step of pre-impregnating, in dry conditions, N parallel strands divided into X groups of Ni strands, by the thermoplastic matrix in powder form in a tank, ΣNi=N et X 3, one thereof from each series being immersed in the powder, each group of strands running on the same number Y of tensioning parts, and the parallel strands being separated by a spacing at least equal to the width of each strand. 1. A method for manufacturing a pre-impregnated fibrous material comprising a fibrous material made of continuous fibers and at least one thermoplastic polymer matrix , wherein said pre-impregnated fibrous material is made as a plurality of unidirectional parallel ribbons or sheets and in that said method comprises a homogeneous pre-impregnation step of said fibrous material in the form of N parallel strands by said at least one thermoplastic polymer matrix in the form of a powder in a tank , said pre-impregnation step being carried out in a dry manner in said tank , the polymers and copolymers from the family of aliphatic, cycloaliphatic or semi-aromatic polyamides (PA) (also called polyphthalamides (PPA)),', 'polyureas,', 'polymers and copolymers from the family of acrylics,', 'polymers and copolymers from the poly aryl ether ketone (PAEK) family like poly(ether ether ketone) (PEEK), or poly(aryl ether ketone ketones) (PAEKK) like poly(ether ketone ketone) (PEKK) or derivatives thereof,', 'aromatic polyether-imides (PEI),', 'polyarylsulfides,', 'polyolefins,', 'polylactic acid (PLA),', 'polyvinyl alcohol (PVA),', 'fluorinated polymers,, 'said N parallel strands being divided into X groups consisting of Ni parallel strands in the direction of travel of the strands, ΣNi=N and X≤N, X ranging from 2 to 200, each group of parallel strands running separately by ...
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