公开(公告)号：US11364660B2

公开(公告)日：2022-06-21

申请号：US17296651

申请日：2019-11-25

Applicant: Arkema France

Inventor： Gilles Hochstetter ,  Arthur Pierre Babeau ,  Axel Salinier ,  Thibaut Savart

IPC: B29B15/00 ,  B29B15/12 ,  B29B15/14 ,  B29K101/12 ,  B29K105/10

Abstract: 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.

公开(公告)号：US11571839B2

公开(公告)日：2023-02-07

申请号：US17040307

申请日：2019-03-19

Applicant: Arkema France

Inventor： Thibaut Savart ,  Gilles Hochstetter ,  Anthony Florencie ,  Patrice Gaillard ,  Axel Salinier ,  Arthur Pierre Babeau

IPC: B29B15/12 ,  B32B5/26 ,  B32B3/26 ,  B32B5/14 ,  C08J5/24 ,  B29K101/12 ,  B29K105/08 ,  B29K507/04

Abstract: A web of impregnated fibrous material(s) including N individual tapes of fibrous material(s) stacked and/or joined in relation to one another, in which said N tapes adhere to each other and can overlap at least partially. The tapes of fibrous material(s) include continuous fibers impregnated with at least one thermoplastic polymer, and optionally a chain extender. The web has a surface, in cross-section perpendicular to the axis of the fibers, S, that is substantially equal to the sum of the surface, in cross-section perpendicular to the axis of the fibers, of each initial individual tape, denoted Sth, Sth being equal to N×l×Ep, wherein l represents the average width of a tape and Ep represents the average thickness of a tape, N being between 2 and 2000, and the average thickness of each individual tape being less than or equal to 150 μm.