[특허]Method for the production of nonwoven web materials

Method for the production of nonwoven web materials 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-047/00
출원번호	US-0694153 (2003-10-27)
등록번호	US-8333918 (2012-12-18)
발명자 / 주소	Lennon, Eric Edward Brock, Thomas William Haynes, Bryan David Hulslander, Douglas Jay
출원인 / 주소	Kimberly-Clark Worldwide, Inc.
대리인 / 주소	Dority & Manning, P.A.
인용정보	피인용 횟수 : 0 인용 특허 : 73

초록 ▼

The present invention provides a method of making a nonwoven web, the method including the steps of providing plurality of fibers and subjecting the fibers to a pneumatic attenuation force which imparts a velocity to the fibers, reducing the velocity of the fibers in a diffusion chamber which is formed substantially between opposed diverging sidewalls, subjecting the fibers to an applied electrostatic charge, and thereafter collecting the fibers into a web on a moving forming surface. The invention also provides an apparatus for forming nonwoven webs, the apparatus comprising a source of fibers, a fiber attenuation chamber, a diffusion chamber formed substantially between opposed diverging sidewalls, the diffusion chamber located below the fiber attenuation chamber, and a forming surface for collecting the fibers as a nonwoven web.

대표청구항 ▼

1. A method of making a nonwoven web, the method comprising: a) providing a plurality of fibers;b) subjecting the fibers to a pneumatic attenuation force in a drawing slot, the attenuation force imparting a velocity to the fibers;c) reducing the velocity of the fibers in a diffusion chamber that is spaced from an exit of the drawing slot in a direction of travel of the plurality of fibers, the diffusion chamber being formed substantially between opposed diverging sidewalls;d) subjecting the fibers to an applied electrostatic charge before the fibers enter the diffusion chamber, wherein the electrostatic charge is applied by two or more oppositely directed electrostatic charging units with each charging unit including an emitter device and a target device such that at least one emitter device is configured on each side of the fibers so that an electrostatic charge is generated from opposite directions transverse to the direction of travel of the plurality of fibers; and thereaftere) collecting the fibers into a web on a moving forming surface. 2. The method of claim 1 wherein the electrostatic charging units are in a staggered configuration. 3. The method of claim 1 wherein the opposed diverging sidewalls are unvented. 4. The method of claim 1 wherein the pneumatic attenuation force is provided by perturbed attenuation air. 5. The method of claim 1 wherein at least one of the opposed diverging sidewalls comprises at least one vortex generator. 6. A method of making a nonwoven web, the method comprising: a) providing a plurality of fibers;b) subjecting the fibers to a pneumatic attenuation force in a drawing slot, the attenuation force imparting a velocity to the fibers;c) reducing the velocity of the fibers in a diffusion chamber, the diffusion chamber being formed substantially between opposed diverging sidewalls;d) subjecting the fibers to and charging the fibers with an applied electrostatic charge while the fibers are in the diffusion chamber, the electrostatic charge being applied by two or more oppositely directed electrostatic charging units wherein at least one electrostatic charging unit includes an emitter device located upon a first one of the diverging sidewalls and a target device located on the opposite diverging wall and a second electrostatic charging unit includes a target device on the first one of the diverging sidewalls and an emitter device on the opposite diverging sidewall so that electrostatic charge is generated from opposite directions between the diverging sidewalls with respect to the direction of travel of the plurality of fibers through the diversion chamber; and thereaftere) collecting the fibers into a web on a moving forming surface. 7. The method of claim 6 wherein at least one electrostatic charging unit is located substantially closer to the drawing slot than at least one other electrostatic charging unit. 8. The method of claim 6 wherein the pneumatic attenuation force is provided by perturbed attenuation air. 9. The method of claim 6 wherein the opposed diverging sidewalls are unvented. 10. The method of claim 6 wherein at least one of the opposed diverging sidewalls comprises at least one vortex generator.

이 특허에 인용된 특허 (73)

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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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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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Method for the production of nonwoven web materials 원문보기

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Method for the production of nonwoven web materials 원문보기

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