[특허]Method for forming wet-laid non-woven webs

Method for forming wet-laid non-woven webs 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	D21D-003/00
출원번호	US-0427482 (1973-12-26)
발명자 / 주소	Ring Michael (Warwick NY) Godsay Madhu P. (New Delhi NY IN) Swenson Roy S. (Central Valley NY) Kent Joseph N. (Lewisburg PA)
출원인 / 주소	International Paper Company (New York NY 02)
인용정보	피인용 횟수 : 46 인용 특허 : 0

초록 ▼

A method of producing textile-like non-woven essentially binderless webs from fiber furnishes at least about 70% of which comprise man made non-fibrillatable low denier fibers having no large area flat surfaces and which are at least about ¼inch in length with a length to diameter ratio of between about 400:1 and 700:1. The method includes a wet laying system in which sufficient wetting agent is added to the water used in dispersing the fibers to wet the fibers completely and reduce the surface tension of the water to between about 30-35 dynes. It also includes agitating the dispersion vigorously to create tumbling water surface conditions in which up to, but less than about 4% by volumeof air is entrained in the water in the form of tiny air bubbles to create a water/air emulsion in which the fibers are dispersed without generating any substantial amount of surface foam. A viscosity modifier in the form of a natural or synthetic gum is also added to stabilize the emulsion and help prevent the dispersed fibers from reflocculating.

대표청구항 ▼

The method of uniformly dispersing selected non-fibrillated fibers in a substantially binder free aqueous medium, a majority of the fibers being man made nonfibrillatable hydrophobic fibers of not less than about ¼inch in length and with a length to diameter ratio of between about 400:1 to about 700:1 including the steps of combining: water, a sufficient amount of the selected fibers for a dispersion having a fiber consistency of between about 0.35% to about 2% based on the bone dry weight of the fibers, and between about 0.007% to about 0.03% by weight of a wetting agent consisting of a selected combination of alkylaryl polyether alcohol (octylphenol series) and N-cyclohexyl-N-Palmitoyl-Taurine having the formula [Figure] in a container to reduce the surface tension of the water to between about 30-35 dynes, and vigorously agitating the mixture in the container in the presence of air to create the tumbling vortex-free water surface conditions without the generation of any substantial amount of surface foam, thereby generating a steady state water/air emulsion in which the fibers are uniformly dispersed and in which the volume of air does not exceed about 4% of the volume of the water. The method of producing a textile-like nonwoven sheet material on a wet-laying web forming wire characterized by forming a uniform initial high fiber consistency dispersion in a water/air emulsion according to claim 1 and thereafter diluting the dispersion to a uniform fiber consistency of between about 0.006% to about 0.01% based on the bone dry weight of the fibers by mixing the initial dispersion with a steady state water/air dilution emulsion in which the volume of air does not exceed about 4% of the volume of the water; which emulsion has been created by reducing the surface tension of the dilution water to between about 30-35 dynes by the addition to it of between about 0.007% to about 0.03% by weight of a wetting agent consisting of a selected combination of alkalaryl polyether alcohol (octylphenol series) and N-cyclohexyl-N-Palmitoyl-Taurine having the formula [Figure] and by vigorously agitating the dilution water with this wetting agent in it in the presence of air to create the water/air dilution emulsion without the generation of any substantial amount of surface foam; and then draining the non-fiber portion of the diluted fiber dispersion through the web forming wire to form the material.

이 특허를 인용한 특허 (46)

Hansen Michael R., Binder treated fibrous webs and products.
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Michael R. Hansen ; Richard H. Young, Sr., Binder treated particles.
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Hansen Michael R. (Seattle WA) Young ; Sr. Richard H. (Renton WA), Binders for binding water soluble particles to fibers.
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Young ; Sr. Richard H. ; Neogi Amar N. ; Hansen Michael R., Coated fiber product with adhered super absorbent particles.
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Hansen, Michael R.; Young, Sr., Richard H., Diol treated particles combined with fibers.
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Williams, Richard C.; Jimenez, Graciela; Skaggs, Benny J., Durable paper.
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Williams, Rick C.; Jimenez, Graciela; Skaggs, Ben J, Durable paper.
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Bayly Andrew E. (Beaconsfield GB2) Biggs Ian S. (High Wycombe GB2) Radvan Bronislaw (Flackwell Heath GB2), Fibre reinforced plastics structures.
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Bayly Andrew E. (Beaconsfield GB2) Biggs Ian S. (High Wycombe GB2) Radvan Bronislaw (Flackwell Heath GB2), Fibre reinforced plastics structures.
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Michael R. Hansen ; Richard H. Young, Sr., Fibrous product containing densifying agent.
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Hansen Michael R. (Seattle WA) Young ; Sr. Richard H. (Renton WA), Fibrous product for binding particles.
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Clitherow Barbara M. (Harpenden GBX) Dean Trevor W. R. (Arlesey GBX) Gascoigne John A. (Hitchin GBX) Van Issum Bernhard E. (Geneva CHX), Filler compositions and their use in papermaking.
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Kinn Larry L. (Northumberland PA) Perry Bruce A. (Holleston MA) Lerner Peter (North Attleboro MA), Filtration fabric produced by wet laid process.
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John Henry Dwiggins ; Dinesh M. Bhat, Foam forming method and apparatus.
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Glen Patrick Reese ; Gary William Cooper, Low shrinkage, uncrimped short-cut fibers for use in wet laid non-woven products and method for making same.
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Kajander,Richard Emil; Jaffee,Alan Michael; Bennett,Glenda B., Making foam coated mats on-line.
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Rene Kapik ; Ganesh C. Deka, Medical packaging fabric with improved bacteria barrier.
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Hansen Michael R. ; Halabisky Donald D., Method and compositions for enhancing blood absorbence by superabsorbent materials.
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Michael R. Hansen ; Donald D. Halabisky, Method and compositions for enhancing blood absorbence by superabsorbent materials.
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Hansen Michael R. (Seattle WA) Young ; Sr. Richard H. (Renton WA), Method for densifying fibers using a densifying agent.
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Hansen, Michael R.; Young, Sr., Richard H., Method for forming a diaper.
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Michael R. Hansen ; Richard H. Young, Sr., Method for making superabsorbent containing diapers.
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Hansen, Michael R.; Young, Sr., Richard H., Method of binding binder treated particles to fibers.
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Hansen,Michael R.; Young, Sr.,Richard H., Method of binding binder treated particles to fibers.
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Michael R. Hansen ; Richard H. Young, Sr., Method of binding binder treated particles to fibers.
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Hansen,Michael R.; Young, Sr.,Richard H., Method of binding particles to binder treated fibers.
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Hansen, Michael R.; Halabisky, Donald D., Method of enhancing blood absorbence by superabsorbent material.
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Chakrabarti Paritosh M. (Wayne NJ), Method of increasing the strength of wet glass fiber mats made by the wet-laid process.
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Biggs Ian S. (Hughenden Valley GB2) Radvan Bronislaw (Flackwell Heath GB2), Method of making fibre reinforced thermoplastics material structure.
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Kajander, Richard Emil; Jaffee, Alan Michael; Bennett, Glenda B., Method of making foam coated mat online.
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Biggs Ian S. (High Wycombe GB2) Radvan Bronislaw (Flackwell Heath GB2), Method of making laminated reinforced thermoplastic sheets and articles made therefrom.
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Radvan Bronislaw (Buckinghamshire GB2) Willis Anthony J. (Bergen-Op-Zoom NLX), Molding of fiber reinforced plastic articles.
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Grose Reginald E. (Westminster MD) Carlson Willard E. (Darien CT), Non-woven fibrous composite materials and method for the preparation thereof.
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Snyder Charles E. (Enfield CT) Elston Colin (Windsor CT), Nonwoven web material for medical towels and the like.
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Hansen Michael R. (Seattle WA) Young ; Sr. Richard H. (Renton WA), Particle binders.
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Hansen Michael R. ; Young ; Sr. Richard H., Particle binders.
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Hansen Michael R. (Seattle WA) Young ; Sr. Richard H. (Renton WA), Particle binding to fibers.
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Biggs Ian S. (High Wycombe GB2) Radvan Bronislaw (Flackwell Heath GB2), Process for forming a sheet of material.
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Mathur, Ashish, Recyclable thermoplastic moldable nonwoven liner for office partition and method for its manufacture.
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Goettmann James A., Reverse osmosis support substrate and method for its manufacture.
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Goettmann James A., Reverse osmosis support substrate and method for its manufacture.
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Hawkins Roland L. (Spartanburg SC), Staple fiber, finish therefor and process for use of same.
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Hawkins Roland L. (Spartanburg SC), Staple fiber, finish therefor and process for use of same.
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Brown Russell L. (Charleston WV) Cunningham Charles J. (Elkview WV), Vacuum guide used in flexible sheet material treatment.
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Brandon Ralph E. (Monroe NY) Davis Charles J. (Goshen NY) Ring Michael (Warwick NY) Swenson Roy S. (Central Valley NY), Viscous dispersion for forming wet-laid, non-woven fabrics.
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Chakrabarti Paritosh M. (Wayne NJ), Wet-strength of wet glass fiber mats by treatment with anionic polyelectrolytes.
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