[특허]Steam explosion treatment with addition of chemicals

[미국특허] Steam explosion treatment with addition of chemicals 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	D21C-005/02 D21H-011/14
출원번호	US-0775919 (2001-02-02)
발명자 / 주소	Hu, Sheng-Hsin Sun, Tong
출원인 / 주소	Kimberly-Clark Worldwide, Inc.
대리인 / 주소	Croft, Gregory E.
인용정보	피인용 횟수 : 61 인용 특허 : 32

초록

Virgin fibers or de-inked recycled fibers modified by steam explosion in the presence of certain chemicals are able to form handsheets with higher bulk while substantially retaining strength and brightness.

대표청구항 ▼

1. A process for the treatment of cellulosic fibers comprising: (a) treating an aqueous slurry of individual cellulosic fibers and boric acid with steam at superatmospheric temperature and pressure, wherein said fibers are selected from the group consisting of kraft fibers and deinked fibers; and (b) explosively releasing the superatmospheric steam pressure to produce curled fibers. 2. The process of claim 1 wherein the aqueous slurry has a consistency of from about 10 to 100 percent. 3. The process of claim 1 wherein the aqueous slurry has a consistency of from about 25 to about 80 percent. 4. The process of claim 1 wherein the aqueous slurry has a consistency of from about 55 to about 75 percent. 5. The process of claim 1 wherein the fibers are treated at a temperature of from about 130° C. to about 250° C. 6. The process of claim 1 wherein the fibers are treated at a temperature of from about 150° C. to about 225° C. 7. The process of claim 1 wherein the fibers are treated at a temperature of from about 160° C. to about 225° C. 8. The process of claim 1 wherein the fibers are treated at a temperature of from about 160° C. to about 200° C. 9. The process of claim 1 wherein the fibers are treated at a pressure of from about 40 to about 405 pounds per square inch. 10. The process of claim 1 wherein the fibers are treated at a pressure of from about 40 to about 230 pounds per square inch. 11. The process of claim 1 wherein the fibers are treated at a pressure of from about 90 to about 230 pounds per square inch. 12. The process of claim 1 wherein the resulting curled fibers have a Wet Curl Index of about 0.2 or greater. 13. The process of claim 1 wherein the resulting curled fibers have a Wet Curl Index of from about 0.2 to about 0.4. 14. The process of claim 1 wherein the resulting curled fibers have a Wet Curl Index of from about 0.2 to about 0.35. 15. The process of claim 1 wherein the resulting curled fibers have a Wet Curl Index of from about 0.22 to about 0.33. 16. The process of claim 1 wherein the resulting curled fibers have a Wet Curl Index of from about 0.25 to about 0.33.

이 특허에 인용된 특허 (32) 인용/피인용 타임라인 분석

Meyer Stephen C. (Cobb County GA) Lance Roger L. (Gwinnet County GA) Hetzler Connie L. (Winnebago County WI) Dunkerly ; II Cedric A. (Outagamie County WI) Roessler Thomas H. (Winnebago County WI) Zen, Absorbent article having a hydrophobic transport layer.
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Roessler Thomas H. (Menasha WI) Endres Dan D. (Appleton WI) Enloe Kenneth M. (Neenah WI) Huntoon Andrew E. (Appleton WI) Lippert Mary E. (Hortonville WI), Absorbent garment with quilted and conformable absorbent pad.
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Graef Peter A. (Tacoma WA) Hunter Frank R. (Bellevue WA), Crosslinked cellulose products and method for their preparation.
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Eber Robert J. (Appleton WI) Janda Bruce W. (Neenah WI), Fibrous webs of enhanced bulk and method of manufacturing same.
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DeLong Edward A. (439-22560 Wye Rd. Sherwood Park ; Alberta T8A 4T6 CAX), Method of producing level off DP microcrystallinecellulose and glucose from lignocellulosic material.
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Sheng-Hsin Hu, Method of steam treating low yield papermaking fibers to produce a permanent curl.
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Bouchette Michael P. (Appleton WI) Yu Ernest K. C. (Mississauga CAX), Method of treatment of waste paper with steam.
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Desrochers Michel J. (Dollard des Ormeaux CAX) Jean Michel (Pointe Claire CAX) Drouin Michel P. (Ile Perrot CAX), Methods for making exploded bark products.
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Eber Robert J. (Appleton WI) Janda Bruce W. (New Milford CT), Multiple layer fibrous web products of enhanced bulk and method of manufacturing same.
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Lowell Jack L. (Houston TX) Nevins Michael J. (Houston TX) Reid Kenneth I. G. (Houston TX) Walter Kenneth L. (The Woodlands TX), Process for preparing alkali metal salt of carboxymethyl cellulose.
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Saito Motoyasu (Yatsushiro JPX) Mukohyama Hideaki (Yatsushiro JPX), Process for preparing cellulose ether.
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DeLong Edward A. (439-22560 Wye Road Sherwood Park ; Alberta CAX T8A 4T6), Process to dissociate and extract the Lignin and the Xylan from the primary wall and middle lamella or lignocellulosic m.
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