[특허]Papermaking process

Papermaking process 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	D21H-021/10
출원번호	US-0766310 (1991-09-27)
발명자 / 주소	Smith Jr. James H. (Warrenville IL)
출원인 / 주소	Nalco Chemical Company (Naperville IL 02)
인용정보	피인용 횟수 : 75 인용 특허 : 0

초록 ▼

In a papermaking process a paper product is formed from a mineral filler containing cellulosic slurry. Retention performance is provided by the sequential addition of a cationic charge-biasing species, an anionic flocculant, and then a certain microparticle. A shear stage is interposed between the f

대표청구항 ▼

A papermaking process in which a paper product is made by forming an aqueous cellulosic slurry, adding a mineral filler to said slurry, adding a cationic charge-biasing species to said slurry after said addition of said mineral filler, whereby said cationic charge-biasing species at least partially neutralizes anionic surface charges on solid surfaces in said slurry and provides cationic patches for an anionic flocculant on solid surfaces in said slurry, draining said slurry to form a sheet, and drying said sheet to form said paper product, wherein said slurry is subjected to at least one shear stage, characterized by: adding an anionic flocculant to said slurry after said addition of cationic charge-biasing species in an amount sufficient to effectuate floc formulation, said anionic flocculant being substantially linear and having at least 2 mole percent anionic mer units and a weight average molecular weight of at least 500,000; subjecting said slurry to a shear stage after said addition of said anionic flocculant; and subsequently adding a microparticle to said slurry prior to said draining of said slurry in an amount effective to provide improved retention performance; wherein said microparticle is an inorganic, cationic source of aluminum having at least 5 weight percent aluminum and having a particle size distribution within the range of from about 1 to about 1,000 nm.

이 특허를 인용한 특허 (75)

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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

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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

Papermaking process 원문보기

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Papermaking process 원문보기

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이 특허를 인용한 특허 (75)

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