US 12,319,018 B2
Fibrous material impregnated with thermoplastic polymer having a thickness of less than or equal to 100MM and method for the production thereof
Gilles Hochstetter, Colombes (FR); Thibaut Savart, Lacq (FR); Arthur Pierre Babeau, Lacq (FR); Anthony Florencie, Bordeaux (FR); Patrice Gaillard, Lacq (FR); and Axel Salinier, Lacq (FR)
Assigned to ARKEMA FRANCE, Puteaux (FR)
Appl. No. 17/040,230
Filed by ARKEMA FRANCE, Colombes (FR)
PCT Filed Mar. 19, 2019, PCT No. PCT/FR2019/050620
§ 371(c)(1), (2) Date Sep. 22, 2020,
PCT Pub. No. WO2019/180370, PCT Pub. Date Sep. 26, 2019.
Claims priority of application No. 1852551 (FR), filed on Mar. 23, 2018.
Prior Publication US 2021/0016523 A1, Jan. 21, 2021
Int. Cl. B29C 70/52 (2006.01); B29K 101/10 (2006.01); C08J 5/04 (2006.01); C08J 5/24 (2006.01)
CPC B29C 70/521 (2013.01) [C08J 5/042 (2013.01); C08J 5/243 (2021.05); C08J 5/249 (2021.05); B29K 2101/10 (2013.01); C08J 2300/22 (2013.01); C08J 2300/24 (2013.01)] 23 Claims
OG exemplary drawing
 
1. An impregnated fibrous material comprising at least one fibrous material consisting of continuous fibers and:
at least one non-reactive thermoplastic polymer matrix, or
at least one reactive thermoplastic prepolymer, which is a precursor of said non-reactive thermoplastic polymer, optionally mixed with a chain extender,
wherein said at least one non-reactive thermoplastic polymer or said reactive prepolymer is an amorphous polymer or prepolymer having a glass transition temperature such that Tg≥80° C., or is a semi-crystalline polymer or prepolymer having a melting temperature Tm≥150° C., the fiber content in said pre-impregnated fibrous material being between 45 and 65% by volume, and the average thickness of said impregnated fibrous material being between 10 μm and 100 μm, independently of the number of fibers present in said fibrous material before impregnation,
wherein the thermoplastic polymer is not polyamide 6 (PA-6),
wherein said impregnated fibrous material is a single-layer material, and
wherein the porosity level in said impregnated fibrous material is less than 10%.