# US 7,608,647 B2 · Resin composition, resin molded article and production method thereof

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- Number: US 7,608,647 B2
- Document ID: US7608647B2
- Status: Granted
- Kind: B2
- Application number: 11/231,930
- Filed: 2005-09-22
- Published: 2006-03-30
- Granted: 2009-10-27
- Earliest claimed: 2004-09-30
- Assignees: Toyoda Gosei Co., Ltd.; Toyota Jidosha Kabushiki Kaisha
- Inventors: Daisuke Tsutsumi; Koichiro Hayashi; Kenichi Yasunaga
- Web page: https://patentgrep.com/patent/US7608647B2

## CPC

- B29C 65/02: by heating, with or without pressure
- B29B 9/14: fibre-reinforced
- B29B 15/122: {with a matrix in liquid form, e.g. as melt, solution or latex}
- B29C 45/0005: {using fibre reinforcements}
- B29C 66/1312: {Single flange to flange joints, the parts to be joined being rigid (the parts to be joined being flexible B29C66/133)}
- B29C 66/543: {joining more than two hollow-preforms to form said hollow articles}
- B29C 65/20: with direct contact, e.g. using "mirror"
- B29C 66/71: {characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125)}
- B29C 66/7212: {characterised by the composition of the fibres}
- B29C 66/73921: {characterised by the materials of both parts being thermoplastics}
- B29K 2105/06: containing reinforcements, fillers or inserts
- B29L 2031/7172: {Fuel tanks, jerry cans}
- B60K 15/03177: {made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material (B60K15/03006 takes precedence)}
- Y10T 428/1352: Polymer or resin containing [i.e., natural or synthetic]
- Y10T 428/1372: Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes
- 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)
- 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
- 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
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention provides a resin composition and a resin molded article capable of designing to make specific properties, in particular, fuel barrier properties, consistent with impact resistance. The resin composition includes a mixture of a thermoplastic resin with fibers having lengths of from 4 to 20 mm. The fibers have melting points higher than a melting point of the thermoplastic resin or are infusible.

## Claims

### Claim 1

A resin molded article comprising a matrix of a thermoplastic resin having dispersed therein organic fibers having lengths of from 4 to 20 mm, wherein
said organic fibers are one of fibers having melting points higher than a melting point of said thermoplastic resin,
said resin molded article is a fuel system part that is to be exposed to a fuel,
said thermoplastic resin is a co-POM resin, which is a kind of polyacetal resin, and
said organic fibers are a polyethylene terephthalate (PET).

### Claim 2 (depends on 1)

The resin molded article according to claim 1, wherein said thermoplastic resin has a fuel permeability coefficient at 65° C. of not more than 1.0×10−11 m3·m/m2/MPa against a test fuel having a composition of toluene, isooctane and ethanol in a mixing volume ratio of 45/45/10.

### Claim 3 (depends on 1)

The resin molded article according to claim 1, wherein said organic fibers have lengths of 6 to 10 mm.