Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1993-12-22
1995-08-29
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264205, 26421116, 26421117, D01D 504, D01F 614
Patent
active
054457858
ABSTRACT:
A method of preparing a nonwoven web of poly(vinyl alcohol) fibers which involves the steps of (1) preparing an aqueous polymer solution of a defined poly(vinyl alcohol); (2) extruding the resulting polymer solution under defined conditions through a die having a plurality of orifices to form a plurality of threadlines; (3) attenuating the resulting threadlines with a defined primary gaseous source to form fibers under conditions of controlled macro scale turbulence and under conditions sufficient to permit the viscosity of each threadline, as it leaves a die orifice and for a distance of no more than about 8 cm, to incrementally increase with increasing distance from the die, while substantially maintaining uniformity of viscosity in the radial direction, at a rate which is sufficient to provide fibers having the desired attenuation and mean fiber diameter without significant fiber breakage; (4) drying the attenuated threadlines with a defined secondary gaseous source; and (5) depositing the resulting fibers randomly on a moving foraminous surface to form a substantially uniform web, the moving foraminous surface being from about 10 to about 100 cm from the opening from which the last gaseous source to contact the threadlines emerges, which fibers have a mean fiber diameter in the range of from about 0.1 to about 30 .mu.m and are substantially free of shot, with the attenuating and drying steps being carried out under conditions of controlled macro scale turbulence.
REFERENCES:
patent: 2357392 (1944-09-01), Francis
patent: 2411660 (1946-11-01), Manning
patent: 2464301 (1949-03-01), Francis
patent: 2483406 (1949-10-01), Francis
patent: 2571457 (1951-10-01), Ladisch
patent: 2988469 (1961-06-01), Watson
patent: 3016599 (1962-01-01), Perry
patent: 3073735 (1963-01-01), Till et al.
patent: 3110642 (1963-11-01), Harrington
patent: 3341394 (1967-09-01), Kinney
patent: 3379811 (1968-04-01), Hartmann
patent: 3429953 (1969-02-01), Crompton
patent: 3655862 (1972-04-01), Dorschner
patent: 3689342 (1972-09-01), Vogt
patent: 3692618 (1972-09-01), Dorschner
patent: 3704198 (1972-11-01), Prentice
patent: 3705068 (1972-12-01), Dobo
patent: 3752613 (1973-08-01), Vogt
patent: 3755527 (1973-08-01), Keller
patent: 3770856 (1973-11-01), Ueki
patent: 3772417 (1973-11-01), Vogt
patent: 3801400 (1974-04-01), Vogt
patent: 3802817 (1974-04-01), Matsuki
patent: 3849241 (1974-11-01), Buntin
patent: 3853651 (1974-12-01), Porte
patent: 3914354 (1975-10-01), Ueki
patent: 3959421 (1976-05-01), Weber et al.
patent: 3972759 (1976-08-01), Buntin
patent: 3978185 (1976-08-01), Buntin
patent: 4011067 (1977-03-01), Carey, Jr.
patent: 4042740 (1977-08-01), Krueger
patent: 4043331 (1977-08-01), Martin
patent: 4064605 (1977-12-01), Akiyama
patent: 4091140 (1978-05-01), Harmon
patent: 4100319 (1978-07-01), Schwartz
patent: 4100324 (1978-07-01), Anderson
patent: 4103058 (1978-07-01), Humlicek
patent: 4104340 (1978-08-01), Ward
patent: 4118531 (1978-10-01), Hauser
patent: 4137379 (1979-01-01), Schmidt
patent: 4174417 (1979-11-01), Rydell
patent: 4211737 (1980-07-01), Di Drusco
patent: 4234652 (1980-11-01), Vanoni
patent: 4238175 (1980-12-01), Fujii
patent: 4295809 (1981-10-01), Mikami
patent: 4340563 (1982-07-01), Appel
patent: 4355081 (1982-10-01), Kinsley
patent: 4375446 (1983-03-01), Fujii
patent: 4381320 (1983-04-01), Nguyen
patent: 4405297 (1983-09-01), Appel
patent: 4429001 (1984-01-01), Kolpin
patent: 4434204 (1984-02-01), Hartman
patent: 4442062 (1984-04-01), Fujii et al.
patent: 4468241 (1984-08-01), Briedenthal
patent: 4622983 (1986-11-01), Mathews et al.
patent: 4627811 (1986-12-01), Greiser
patent: 4644045 (1987-02-01), Fowells
patent: 4663220 (1987-05-01), Wisneski
patent: 4726901 (1988-02-01), Pall
patent: 4734227 (1988-03-01), Smith
patent: 4741941 (1988-05-01), Englebert
patent: 4755178 (1988-07-01), Insley
patent: 4808367 (1989-02-01), Homma et al.
patent: 4855179 (1989-08-01), Bourland
patent: 4968471 (1990-11-01), Ito
patent: 4971861 (1990-11-01), Watanabe et al.
patent: 5041252 (1991-08-01), Fujii et al.
patent: 5093063 (1992-03-01), Watanabe et al.
Ichiro Sakurada, "Polyvinyl Alcohol Fibers", Marcel Dekker, Inc. New York, 1985, pp. 249-267.
V. A. Wente, "Superfine Thermoplastic Fibers", Industrial and Engineering Chemistry, vol. 48, No. 8, pp. 1342-1346 (1956).
V. A. Wente, et al., "Manufacture of Superfine Organic Fibers", Navy Research Lab., Wash. D.C., NRL Rpt. 4364 (111437) May 25, 1954.
R. R. Butin, et al., "Melt Blowing-A One Step Web Process for New Nonwoven Products", Journal of the Technical Association of the Pulp & Paper Indus., vol. 56, No. 4, pp. 74-77 (1973).
George Odian, "Principles of Polymerization", John Wiley & Sons 1981, pp. 5, 10-17.
"Fundamental Aspects of Solution Dry Spinning", Man-Made Fibers Science & Technology, John Wiley & Sons, 1967, vol. 1 pp. 133-167.
Applied Polymer Science, 2nd Ed., American Chemical Society 1985, pp. 41-43.
Abstract of Japan 63-219,618 (Published Sep. 13, 1988).
Kimberly-Clark Corporation
Maycock William E.
Tentoni Leo B.
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