Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1994-09-29
1997-09-23
Weiss, John G.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
604378, 604379, 604358, A61F 1315
Patent
active
056698950
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/US92/09717 filed Nov. 6, 1992, which is the PCT filing of Japanese application 294665 filed Nov. 11, 1991.
FIELD OF THE INVENTION
This invention relates to a novel absorbent article, particularly to a sanitary article such as a sanitary napkin or an absorbing sheet. As used herein, the term "absorbent article" refers to devices which absorb and contain body exudes, and, more specifically, refers to devices which are placed against or in proximity to the body of the wearer to absorb and contain the various liquid exudates discharged from the body.
BACKGROUND OF THE INVENTION
All manner and variety of absorbent articles configured for the absorption of body exuded (liquids or fluids) such as menses, urine, and feces are, of course, known. Generally, an absorbent article comprises a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core or pad positioned between the topsheet and the backsheet. The exudates from a wearer's body readily penetrate through the topsheet and are contained in the absorbent core. An additional layer or layers can also be interposed between any of these layers. Such additional layers can provide a rapid distribution of the exudates.
Such distribution layers improve wicking of exudates over and into the absorbent core. There are several reasons why the improved wicking of liquid exudates is important, including providing a more even distribution of the liquid exudates throughout the absorbent core and allowing the absorbent article to be made relatively thin. The wicking referred to herein can encompass the transportation of liquids in one, two or all directions (i.e., in the x-y plane and/or in the z-direction). The distribution layer can comprise several different materials including nonwoven or woven webs of synthetic fibers. Several references describe absorbent products having layers for such purpose. Examples of sanitary napkins having an acquisition layer and a topsheet are more fully described in U.S. Pat. No. 4,950,264 issued to Osborn, and U.S. patent application Ser. No. 07/810,774, "Absorbent Article Having Fused Layers", filed Dec. 17, 1991 now abandoned in the names of Cree, et al. Each of these references are incorporated herein by reference.
However, there is need for a much improved liquid distribution layer having a high liquid diffusion rate in a longitudinal direction. That is, the diffusion speed of nonwovens is generally constant irrespective of direction. When nonwoven material in general is used as an absorbent core cover sheet or as a topsheet in a sanitary napkin, a large amount of liquid can be wicked in the lateral (width) direction. Side leakage can sometimes result when the liquid absorption capacity in the lateral sides of the absorbent core is exceeded.
Therefore, it is an object of the present invention to provide a liquid distribution strip having improved wicking, and superior liquid distribution to the longitudinal ends of the sanitary napkin. It is also an object of the present invention to provide a liquid distribution strip having inhibited liquid distribution to the sides of the sanitary napkin.
It is a further object of the present invention to provide an absorbent article with such an improved distribution strip.
SUMMARY OF THE INVENTION
The present invention provides an absorbent article such as sanitary napkins, disposable diapers, and incontinent pads, having a rapid liquid distribution strip that provides improved distribution or wicking of liquid exudates. Such absorbent article comprising a liquid permeable topsheet, a liquid impermeable backsheet, a liquid absorbent pad and a liquid distribution strip. The absorbent pad is positioned between the topsheet and the backsheet and has longitudinal ends. The liquid distribution strip is positioned between the topsheet and the absorbent pad. The liquid distribution strip comprises a nonwoven web which has a screen pattern comprising high fiber density portions with reduced spacing between the fibers, or has an embossed pattern ha
REFERENCES:
patent: Re26515 (1969-01-01), Holliday et al.
patent: Re32649 (1988-04-01), Brandt et al.
patent: 1946626 (1934-02-01), Jurgensen
patent: 2296341 (1942-09-01), Fourness
patent: 2548341 (1951-04-01), Bricmont
patent: 2551663 (1951-05-01), Fox
patent: 2929179 (1960-03-01), George
patent: 3095878 (1963-07-01), Bassett
patent: 3343543 (1967-09-01), Glassman
patent: 3356092 (1967-12-01), Joa
patent: 3386442 (1968-06-01), Sabee
patent: 3397697 (1968-08-01), Rickard
patent: 3406688 (1968-10-01), Cubitt
patent: 3431911 (1969-03-01), Meisel
patent: 3523535 (1970-08-01), Croon et al.
patent: 3528421 (1970-09-01), Vaillancourt et al.
patent: 3572342 (1971-03-01), Lindquist et al.
patent: 3593717 (1971-07-01), Jones
patent: 3604422 (1971-09-01), Sabee
patent: 3651809 (1972-03-01), Champaigne, Jr.
patent: 3695269 (1972-10-01), Malaney
patent: 3716430 (1973-02-01), Croon et al.
patent: 3736931 (1973-06-01), Glassman
patent: 3799167 (1974-03-01), Miller et al.
patent: 3815602 (1974-06-01), Johns et al.
patent: 3825006 (1974-07-01), Ralph
patent: 3838693 (1974-10-01), Sherman
patent: 3844288 (1974-10-01), Kiela
patent: 3871037 (1975-03-01), Willington
patent: 3954721 (1976-05-01), Gross
patent: 3983095 (1976-09-01), Bashaw et al.
patent: 3996936 (1976-12-01), Widlund et al.
patent: 4050462 (1977-09-01), Woon et al.
patent: 4136697 (1979-01-01), Smith
patent: 4211227 (1980-07-01), Anderson et al.
patent: 4231357 (1980-11-01), Hessner
patent: 4285342 (1981-08-01), Mesek
patent: 4287251 (1981-09-01), King et al.
patent: 4324246 (1982-04-01), Mullane et al.
patent: 4335722 (1982-06-01), Jackson
patent: 4338371 (1982-07-01), Dawn et al.
patent: 4360022 (1982-11-01), Usami et al.
patent: 4364992 (1982-12-01), Ito et al.
patent: 4397644 (1983-08-01), Matthews et al.
patent: 4410324 (1983-10-01), Sabee
patent: 4411660 (1983-10-01), Dawn et al.
patent: 4443512 (1984-04-01), Deluaux
patent: 4500315 (1985-02-01), Pieniak et al.
patent: 4536181 (1985-08-01), Cook
patent: 4537590 (1985-08-01), Peiniak et al.
patent: 4557777 (1985-12-01), Sabee
patent: 4579556 (1986-04-01), McFarland
patent: 4610678 (1986-09-01), Weisman et al.
patent: 4655757 (1987-04-01), McFarland et al.
patent: 4666439 (1987-05-01), Williams et al.
patent: 4673402 (1987-06-01), Weisman et al.
patent: 4676784 (1987-06-01), Erdman et al.
patent: 4681577 (1987-07-01), Stern et al.
patent: 4685914 (1987-08-01), Holtman
patent: 4699823 (1987-10-01), Kellenberger et al.
patent: 4701177 (1987-10-01), Ellis et al.
patent: 4762520 (1988-08-01), Wallstrom
patent: 4769022 (1988-09-01), Chang et al.
patent: 4781710 (1988-11-01), Megison et al.
patent: 4781711 (1988-11-01), Houghton et al.
patent: 4787896 (1988-11-01), Houghton et al.
patent: 4798603 (1989-01-01), Meyer et al.
patent: 4855179 (1989-08-01), Bourland et al.
patent: 4880419 (1989-11-01), Ness
patent: 4888238 (1989-12-01), Katz et al.
patent: 4892535 (1990-01-01), Bjornberg et al.
patent: 4900318 (1990-02-01), Toth
patent: 4923454 (1990-05-01), Seymour et al.
patent: 4935022 (1990-06-01), Lash et al.
patent: 4936839 (1990-06-01), Molee et al.
patent: 4938754 (1990-07-01), Mesek
patent: 4950262 (1990-08-01), Takagi
patent: 4988344 (1991-01-01), Reising et al.
patent: 4988345 (1991-01-01), Reising
patent: 4990147 (1991-02-01), Freeland
patent: 5013309 (1991-05-01), Baigas, Jr. et al.
patent: 5037409 (1991-08-01), Chen et al.
patent: 5061259 (1991-10-01), Goldman et al.
patent: 5061260 (1991-10-01), Callahan et al.
patent: 5092860 (1992-03-01), Pigneul
patent: 5098422 (1992-03-01), Davis et al.
patent: 5128193 (1992-07-01), Anapol et al.
patent: 5147345 (1992-09-01), Young et al.
patent: 5149335 (1992-09-01), Kellenberger et al.
patent: 5175046 (1992-12-01), Nguyen
patent: 5176668 (1993-01-01), Bernardin
patent: 5192606 (1993-03-01), Proxmire et al.
patent: 5200248 (1993-04-01), Thompson et al.
patent: 5217445 (1993-06-01), Young et al.
patent: 5300054 (1994-04-01), Feist et al.
patent: 5360420 (1994-11-01), Cook et al.
Masuda Yumi
Murakami Setsuko
Bamber Jeffrey V.
Milbrada Edward J.
Miller Steven W.
Ruhl Dennis
The Procter & Gamble & Company
LandOfFree
Absorbent article having rapid distribution strip does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Absorbent article having rapid distribution strip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absorbent article having rapid distribution strip will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1937440