US 10,309,045 B2Granted

Fiber-reinforced resin forming material and method of producing same

AssigneeToray Industries, Inc.

InventorsKenta Bamba, Tetsuya Motohashi, Katsuhiro Miyoshi, Takafumi Hashimoto

Life of this patent

Estimating the term…

Loading patent…

Abstract

A fiber-reinforced resin forming material contains at least a matrix resin and bundled aggregates of discontinuous reinforcing fibers, wherein: the bundled aggregates include both reinforcing fiber aggregates A having a shape formed by cutting after having performed a splitting treatment to completely split the strands of continuous reinforcing fibers into a plurality of bundles of strands, and reinforcing fiber aggregates B1 having a shape that includes unsplit parts where splitting treatment was inadequate and/or reinforcing fiber aggregates B2 having a shape not subjected to splitting treatment; and both the ratio of the weight of the reinforcing fiber aggregates B1 with respect to the total weight of reinforcing fibers in the fiber-reinforced resin forming material, and the ratio of the total weight of the reinforcing fiber aggregates B1 and the reinforcing fiber aggregates B2 with respect to the total weight of reinforcing fibers in the fiber-reinforced resin forming material, are 50-95%.

Claims5

Dependent claims

A fiber-reinforced resin forming material containing at least a bundled aggregate of discontinuous reinforcing fibers and a matrix resin, wherein

the bundled aggregate of reinforcing fibers includes both a reinforcing fiber aggregate A formed by cutting a strand of continuous reinforcing fibers after a splitting treatment is performed to completely split the strand into a plurality of bundles, and
a reinforcing fiber aggregate B1 having a shape of an unsplit part to which the splitting treatment is not complete and/or
a reinforcing fiber aggregate B2 having a shape to which the splitting treatment is not performed, wherein
both a ratio (i) of weight of the reinforcing fiber aggregate B1 with respect to a total weight of reinforcing fibers in the fiber-reinforced resin forming material, and a ratio (ii) of a total weight of the reinforcing fiber aggregate B1 and the reinforcing fiber aggregate B2 with respect to the total weight of reinforcing fibers in the fiber-reinforced resin forming material, are 50 to 95%, and
a ratio of the weight of the reinforcing fiber aggregate B1 with respect to the total weight of the reinforcing fiber aggregate B1 and the reinforcing fiber aggregate B2 is more than 4%.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/562,510Filed 17 Mar 2016
Priority: JP 2015-06853030 Mar 2015
Published: US 2018/0094368 A15 Apr 2018
Granted: 4 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

D04H 1/4242
Inorganic fibres: carbon fibres
C08J 5/042
With inorganic fibres: with carbon fibres
C08J 5/06
Reinforcing macromolecular compounds with loose or coherent fibrous material: using pretreated fibrous materials
C08K 3/013
Characterized by their specific function: fillers, pigments or reinforcing additives

Family

US 2018/0094368 A1Pre-grant publication · published 5 Apr 2018
US 10,309,045 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key