[특허]Multilayer fuel tank with a seam having an overlay for reducing vapor permeation

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65D-006/32 B65D-006/34
출원번호	US-0134486 (2005-05-20)
등록번호	US-8381928 (2013-02-26)
발명자 / 주소	Burrington, Win S. Osborne, James R. Toth, Steve L.
출원인 / 주소	TI Group Automotive Systems, L.L.C.
인용정보	피인용 횟수 : 2 인용 특허 : 56

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A method of reducing fuel vapor permeation through a multi-layer tank includes providing a multi-layer overlay onto at least a portion of a structural layer of the multi-layer tank. The multi-layer overlay preferably comprises at least one structural layer composed of a polymeric material that is co

A method of reducing fuel vapor permeation through a multi-layer tank includes providing a multi-layer overlay onto at least a portion of a structural layer of the multi-layer tank. The multi-layer overlay preferably comprises at least one structural layer composed of a polymeric material that is compatible with one or more of the polymeric structural layer(s) of the multi-layer tank. The multi-layer overlay further comprises at least one barrier layer composed of a vapor barrier material resistant to hydrocarbon permeation therethrough. The multi-layer overlay may be secured to the multi-layer tank by, for example, applying a suitable amount of heat and pressure thereto or by molding the multi-layer overlay to the tank body during a tank forming process.

대표청구항 ▼

1. A multi-layer fuel tank comprising: a wall defining an enclosure in which a hydrocarbon fuel is stored and having an EVOH polymeric hydrocarbon vapor permeation barrier layer which is discontinuous at a seam and at least one HDPE polymeric structural layer outboard of and adhered to the EVOH poly

1. A multi-layer fuel tank comprising: a wall defining an enclosure in which a hydrocarbon fuel is stored and having an EVOH polymeric hydrocarbon vapor permeation barrier layer which is discontinuous at a seam and at least one HDPE polymeric structural layer outboard of and adhered to the EVOH polymeric vapor barrier layer and the outboard structural layer having a smooth and continuous outer surface of the seam over the discontinuous portion of the barrier layer;a separate overlay of a relatively thin and relatively flat preformed strip carried by the wall, disposed over the seam and spanning the discontinuous portion of the barrier layer of the seam and having, a hydrocarbon fuel and fuel vapor permeation barrier layer composed of a continuous polymeric or metal barrier material resistant to hydrocarbon fuel vapor permeation therethrough and an HDPE polymeric structural layer adhered throughout to the permeation barrier layer of the overlay and adhered and heat bonded throughout to the outboard HDPE structural layer of the wall by having heated to a temperature of at least about 200° C. the HDPE structural layer of the overlay and the adjoining HDPE structural layer of the wall and applied pressure to urge into engagement throughout the heated HDPE layer of the overlay and a confronting heated portion of the HDPE layer of the wall to adhere and bond them together throughout the HDPE structural layer of the overlay to provide a continuous outboard structural layer of the wall over the discontinuous portion of the barrier layer of the wall and inhibit hydrocarbon fuel and hydrocarbon fuel vapor permeation through the discontinuous barrier layer of the seam of the wall. 2. The multi-layer tank of claim 1 wherein the temperature is in the range of about 200° C. to 270° C. 3. The multi-layer tank of claim 1 wherein the permeation barrier material of the overlay is a continuous metal layer. 4. The multi-layer tank of claim 1 wherein the permeation barrier layer of the overlay is a continuous metal layer and the structural layer of the overlay was heated to the temperature of at least 200° C. by induction heating of the metallic barrier layer. 5. The multi-layer tank of claim 1 wherein the overlay was bonded to the wall during forming of the wall into the enclosure in which hydrocarbon fuel is stored. 6. The multi-layer tank of claim 1 wherein the pressure was at least 5 psi. 7. The multi-layer tank of claim 1 wherein the temperature was in the range of 200° C. to 270° C. 8. A multi-layer fuel tank comprising: a wall defining an enclosure in which a hydrocarbon fuel is stored and having an EVOH polymeric hydrocarbon vapor permeation barrier layer which is discontinuous at a seam and at least one HDPE polymeric structural layer outboard of and adhered to the EVOH polymeric vapor barrier layer and having a smooth and continuous outer surface over the discontinuous portion of the barrier layer of the seam;a separate overlay of a relatively thin and relatively flat preformed strip carried by the wall, disposed over the seam, spanning the discontinuous portion of the barrier layer of the seam and having a hydrocarbon fuel and hydrocarbon fuel vapor permeation barrier layer composed of a continuous polymeric or metal barrier material resistant to hydrocarbon fuel and hydrocarbon fuel vapor permeation therethrough and an HDPE polymeric structural layer adhered throughout to the permeation barrier layer of the overlay and adhered and heat bonded throughout to the HDPE structural layer of the wall by having been heated to a temperature of at least about 200° C. the HDPE structural layer of the overlay and the confronting portion of HDPE structural layer of the wall and applied pressure to urge into engagement throughout the heated HDPE layer of the overlay and a confronting heated portion of the HDPE layer of the wall to adhere and bond them together throughout the HDPE structural layer of the overlay; andthe separate overlay strip was bonded to the wall during blow molding of a heated parison with the confronting HDPE layers of the overlay and the wall heated to bond them together by heating while blow molding the parison to form the wall defining the enclosure in which the hydrocarbon fuel is stored to provide a continuous outer structural layer of the wall over the discontinuous barrier layer of the seam and inhibit hydrocarbon fuel and hydrocarbon fuel vapor permeation through the discontinuous seam. 9. A multi-layer fuel tank comprising: a wall defining an enclosure in which a hydrocarbon fuel is stored and having an EVOH hydrocarbon vapor permeation barrier layer which is discontinuous at a seam and at least one HDPE structural layer outboard of and adhered to the EVOH barrier layer, said at least one structural layer having an outer surface that is substantially planar in an area over the discontinuous portion of the barrier layer;a separate overlay of a relatively thin and relatively flat preformed strip carried by the wall, disposed over the seam, spanning the discontinuous portion of the barrier layer of the seam of the wall, and having a hydrocarbon fuel and hydrocarbon fuel vapor permeation barrier layer composed of a continuous polymeric or metal barrier material resistant to hydrocarbon fuel vapor permeation therethrough and an HDPE structural layer adhered throughout to the permeation barrier layer of the overlay and heat bonded to the HDPE structural layer of the wall by having heated to a temperature of at least about 200° C. the HDPE structural layer of the overlay and the adjoining HDPE layer of the wall and applied pressure to urge into engagement the heated HDPE layer of the overlay and a confronting heated portion of the HDPE layer of the wall by having blow molded a heated parison to have formed the wall and urged the confronting heated structural layer portion of the wall into engagement with the heated overlay to adhere and bond them together throughout the HDPE layer of the overlay to provide a continuous outer structural layer of the wall over the discontinuous barrier layer of the seam and inhibit hydrocarbon fuel and hydrocarbon fuel vapor permeation through the discontinuous seam of the wall. 10. The multi-layer tank of claim 9 wherein the permeation barrier material of the overlay is a continuous metal layer. 11. The multi-layer tank of claim 9 wherein the temperature was in the range of 200° C. to 270° C.

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이 특허에 인용된 특허 (56) 인용/피인용 타임라인 분석

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[미국특허] Multilayer fuel tank with a seam having an overlay for reducing vapor permeation 원문보기

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