[특허]Process for coating carbon fibers with pitch and composites made therefrom

Process for coating carbon fibers with pitch and composites made therefrom 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B05D-003/02
출원번호	US-0008787 (1993-01-22)
발명자 / 주소	Edie Danny D. (Clemson SC) Klett James W. (Seneca SC)
출원인 / 주소	Clemson University (Clemson SC 02)
인용정보	피인용 횟수 : 23 인용 특허 : 0

초록 ▼

The present invention is directed to a process for coating carbon fibers with a pitch material. The process employs a pressurized air-comb for spreading a carbon fiber tow into individual carbon fiber filaments and providing the carbon fiber filaments in a spreaded tow to a powder deposition chamber. A pitch material is dried and finely ground and is then fed into the coating chamber at a point above the traveling spreaded carbon fiber tow. The pitch powder initially falls onto the fiber tow and begins forming a uniform coating around the individual carbon fibers. After falling past the point of the traveling carbon tow, the pitch powder is then recirculated back to the upper portion of the coating chamber and is entrained within a pitch powder cloud through which the threaded fiber tow travels. Fibers that are coated by such a method may be used to form carbon/carbon composites that exhibit high strength and excellent mechanical properties. The carbon fibers that are coated according to the present invention do not require the repeated multi-impregnation steps normally associated with carbon/carbon composite formation.

대표청구항 ▼

A process for forming a carbon/carbon composite comprising the steps of: a) providing a carbon fiber tow to a pressurized air comb spreader, said air comb spreader including a tow spreading chamber having an entrance and an exit for said fiber tow, wherein air is forced in through a plurality of air comb slits for intersecting said fiber tow in a substantially perpendicular direction as said fiber tow moves from said entrance to said exit to spread said carbon fiber tow into substantially individual fiber filaments to create a spreaded fiber tow; b) providing said spreaded fiber tow to a powder coating chamber for depositing a pitch material onto said substantially individual carbon fiber filaments; c) depositing said pitch material onto said carbon fiber filaments to form a pitch-coated carbon fiber tow by providing said pitch material in dry powdered form to an upper portion of said fiber coating chamber, said dry pitch powder being provided to said coating chamber at a point of low air velocity so that said pitch powder falls onto said spreaded fiber tow traveling through said powder coating chamber prior to said pitch powder entering into a region of high air velocity within said coating chamber and being recirculated back to a region of low air velocity in said coating chamber; d) providing said pitch-coated carbon fiber tow for further processing; and e) forming said pitch-coated carbon fiber tow into a carbon/carbon composite by subjecting said pitch-coated tow to carbonization.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Process for coating carbon fibers with pitch and composites made therefrom 원문보기

초록 ▼

대표청구항 ▼

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Process for coating carbon fibers with pitch and composites made therefrom 원문보기

초록 ▼

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연구과제 타임라인

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