# US 2019/0168468 A1 · Fiber-reinforced plastic and method of producing the fiber-reinforced plastic

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- Number: US 2019/0168468 A1
- Document ID: US20190168468A1
- Status: Published application
- Kind: A1
- Application number: 16/160,705
- Filed: 2018-10-15
- Published: 2019-06-06
- Earliest claimed: 2017-12-04
- Assignees: Subaru Corporation
- Applicants: Subaru Corporation
- Inventors: Shota MATSUMOTO; Kosuke KAWAI
- Web page: https://patentgrep.com/patent/US20190168468A1

## CPC

- B29C 70/48: and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM] {, e.g. by vacuum}
- B29C 70/682: {Preformed parts characterised by their structure, e.g. form}
- B29C 70/78: Moulding material on one side only of the preformed part
- B32B 5/022: {Non-woven fabric}
- B32B 5/026: {Knitted fabric}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 27/308: {comprising acrylic (co)polymers}
- B32B 27/36: comprising polyesters
- B32B 27/365: {comprising polycarbonates}
- B29K 2105/0845: {Woven fabrics}
- B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12}
- B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)}
- B32B 5/024: {Woven fabric}
- B32B 27/12: next to a fibrous or filamentary layer
- B32B 2260/021: Fibrous or filamentary layer
- B32B 2260/023: Two or more layers
- B32B 2260/046: Synthetic resin
- B32B 2262/101: Glass fibres
- B32B 2262/106: Carbon fibres, e.g. graphite fibres
- B32B 2307/412: Transparent
- B32B 2307/732: Dimensional properties
- B32B 2605/08: Cars
- B32B 2605/18: Aircraft
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

A method of producing a fiber-reinforced plastic includes disposing a transparent film as an outermost layer on a lower die of a molding die, disposing a base sheet formed of a fiber fabric on the transparent film, closing the molding die with an upper die, and injecting a matrix resin into the molding die closed. The transparent film has grooves on a surface facing the base sheet. In the disposing, the base sheet is disposed such that the grooves are located between adjacent weaving gaps of the base sheet.

## Claims

### Claim 1

A method of producing a fiber-reinforced plastic, the method comprising:
disposing a transparent film as an outermost layer on a lower die of a molding die and disposing a base sheet formed of a fiber fabric on the transparent film; and
closing the molding die with an upper die and injecting a matrix resin into the molding die closed, wherein
the transparent film has grooves on a surface facing the base sheet, and
the base sheet is disposed in the disposing such that the grooves are located between adjacent weaving gaps of the base sheet.

### Claim 2 (depends on 1)

The method of producing a fiber-reinforced plastic according to claim 1, wherein the transparent film has a number of fine through holes in a front surface.

### Claim 3 (depends on 1)

The method of producing a fiber-reinforced plastic according to claim 1, wherein the grooves on the transparent film forms a grid and a width of the grid between adjacent grooves is substantially equal to or smaller than a width between the adjacent weaving gaps of the base sheet.

### Claim 4 (depends on 2)

The method of producing a fiber-reinforced plastic according to claim 2, wherein the grooves on the transparent film forms a grid and a width of the grid between adjacent grooves is substantially equal to or smaller than a width between the adjacent weaving gaps of the base sheet.

### Claim 5 (depends on 1)

The method of producing a fiber-reinforced plastic according to claim 1, wherein the transparent film has a through hole at an intersection of the grooves forming a grid.

### Claim 6 (depends on 2)

The method of producing a fiber-reinforced plastic according to claim 2, wherein the transparent film has a through hole at an intersection of the grooves forming a grid.

### Claim 7 (depends on 3)

The method of producing a fiber-reinforced plastic according to claim 3, wherein the transparent film has a through hole at an intersection of the grooves forming the grid.

### Claim 8

A fiber-reinforced plastic comprising:
a fiber-reinforced plastic layer that comprises a base sheet formed of a fiber fabric as a front layer and is impregnated with a matrix resin; and
a transparent film as an outermost layer that covers the front layer of the fiber-reinforced plastic layer and is integrally molded with the fiber-reinforced plastic layer, wherein
the transparent film has grooves on a surface facing the base sheet, and
the grooves are located at least between adjacent weaving gaps of the base sheet and the matrix resin fills the grooves.