The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 2025
Filed:
Jul. 07, 2021
Mitsubishi Chemical Corporation, Tokyo, JP;
Yukichi Konami, Tokyo, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A fiber-reinforced resin molding material may include a reinforcement fiber sheet of basis weight 200 to 3,000 g/mis impregnated with a resin composition to a resin composition of 25 to 55 vol. % of 100% total fiber-reinforced resin molding material mass. A thickness from a first surface to a position of 10 mass % resin composition being d1 (μm), and a thickness from an opposite surface to a position occupied by 10 mass % resin composition being d2 (μm) giving an absolute value, |d1−d2|, of 50 μm or less. A method for manufacturing such a material may include: impregnating a reinforcement fiber sheet including (i) a unidirectional sheet with plural continuous parallel fibers, (ii) a woven fabric of woven continuous fibers, and/or (iii) a non-crimp fabric containing continuous fibers of resin composition having an initial viscosity of ≤1 Pa·s and a viscosity of 5,000 to 150,000 Pa·s after 7 days at 25° C.