# US 7,407,688 B2 · Process for recycling waste FRP

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,407,688 B2
- Document ID: US7407688B2
- Status: Granted
- Kind: B2
- Application number: 10/938,307
- Filed: 2004-09-10
- Published: 2005-05-26
- Granted: 2008-08-05
- Earliest claimed: 2003-09-11
- Assignees: Misawa Homes Co., Ltd.
- Inventors: Masayuki Kamite; Masami Kato
- Web page: https://patentgrep.com/patent/US7407688B2

## CPC

- C08J 11/04: of polymers
- B29B 7/603: {in measured doses, e.g. proportioning of several materials}
- B29B 7/748: {Plants (B29B7/7433, B29B7/7485, B29B7/7495 take precedence)}
- B29B 7/7485: {with consecutive mixers, e.g. with premixing some of the components}
- B29B 7/905: {with means for pretreatment of the charges or fibres}
- B29B 7/92: Wood chips or wood fibres
- B29B 17/0042: {for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic}
- C08L 97/02: Lignocellulosic material, e.g. wood, straw or bagasse {(manufacture of articles made from lignocellulosic material by dry processes B27N)}
- B29B 7/38: rotary (B29B7/52 takes precedence)
- B29B 17/02: Separating plastics from other materials
- B29B 2017/0272: {Magnetic separation}
- B29C 59/08: by flame treatment {; using hot gases}
- B29K 2023/06: {PE, i.e. polyethylene}
- B29K 2023/12: {PP, i.e. polypropylene}
- B29K 2025/00: Use of polymers of vinyl-aromatic compounds {or derivatives thereof} as moulding material
- B29K 2027/06: PVC, i.e. polyvinylchloride
- B29K 2055/02: ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
- B29K 2105/06: containing reinforcements, fillers or inserts
- B29K 2105/065: {containing impurities}
- B29K 2105/26: Scrap {or recycled material}
- B29K 2705/00: Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K 2705/12: Iron
- B29K 2711/14: Wood, e.g. woodboard or fibreboard
- B29L 2007/002: {Panels; Plates; Sheets}
- B29L 2031/10: Building elements, e.g. bricks, blocks, tiles, panels, posts, beams {(frameless domes B29L2025/00, doors B29L2031/724)}
- C08J 2323/00: Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J 2323/12: Polypropene
- Y02P 20/143: the feedstock being recycled material, e.g. plastics
- Y02W 30/52: Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
- Y02W 30/62: Plastics recycling; Rubber recycling
- Y02W 30/78: Recycling of wood or furniture waste
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- 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)
- 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
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

The present invention provides a process for recycling waste FRP which can simply and effectively reuse waste FRP. This process comprises the steps of mixing a cellulose fine powder derived from wood, a resin powder, and an FPR powder derived from waste FRP, to obtain a mixture; and melting and molding the mixture into a given shape to prepare a molded resin product containing 10-65% by weight of said cellulose fine powder, 25-40% by weight of said resin powder, and 10-30% by weight of said FPR powder on the basis of the mixture.

## Claims

### Claim 1

A process for recycling waste FRP, comprising mixing a cellulose fine powder having a diameter smaller than 300 μm derived from wood, a resin powder, and an FPR powder derived from waste FRP materials, to obtain a mixture; and melting molding the mixture into a given shape to prepare a molded resin product containing 10-65% by weight of said cellulose fine powder, 25-40% by weight of said resin powder, and 10-30% by weight of said FPR powder on the basis of the mixture.

### Claim 2 (depends on 1)

The process for recycling waste FRP as claimed in claim 1, wherein the resin is the waste resin made from polypropylene resin and packing films made from polyolefin resin.

### Claim 3 (depends on 1)

The process for recycling waste FRP as claimed in claim 1, wherein the surface of the molded resin product is treated with flame for oxidation after a silane treatment.

### Claim 4 (depends on 3)

The process for recycling waste FRP as claimed in claim 3, wherein wood grain patterns are printed on the surface of the flame-treated molded resin product.