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Publication numberUS3612054 A
Publication typeGrant
Publication dateOct 12, 1971
Filing dateJul 24, 1969
Priority dateJul 31, 1968
Publication numberUS 3612054 A, US 3612054A, US-A-3612054, US3612054 A, US3612054A
InventorsNobu Konishi, Tamio Matsuda, Tsutomu Okamura
Original AssigneeYamanouchi Pharma Co Ltd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sanitary napkin
US 3612054 A
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Description  (OCR text may contain errors)

United States Patent Appl. No. Filed Patented Assignee Priority SANITARY NAPKIN 2 Claims, 7 Drawing Figs.

US. Cl 128/287 Int. A61f 13/16 Field 01 Search 128/287,

[56] References Cited UNITED STATES PATENTS 1,643,615 9/1927 Williams 128/290 1,843,037 1/1932 Mathey 128/290 1,863,333 6/1932 Heitmeyer 128/290 2,464,640 3/1949 FOUIHESS 128/290 2,566,325 9/1951 Ganz... 128/290 Primary Examiner-Charles F. Rosenbaum Attorney-Wenderoth, Lind & Ponack ABSTRACT: A sanitary napkin comprising a plurality of layers of absorbent material, at least one barrier sheet of liquid repellent material interposed between said absorbent layers, said sheet being completely liquid repellent, a waterproof strip, and an outer wrapper.

PATENTEDUBHZIQH I $612,054

SHEET 2 OF 2 0 Fly. 4 ll 8 9 9b 80 TAMIL) MA'ISUDA 'LSUTOMU OKAMURA NOBU KONISHI SANITARY NAPKIN This invention relates to an improved sanitary napkin.

The main object of this invention is to provide a sanitary napkin of an improved construction which contains one or three barrier sheets of liquid repellent material to utilize the absorbing capacity of the absorbent layers effectively. Another object is that of providing a sanitary napkin construction which makes it possible to attain the foregoing main object in a commercially practicable manner. Other specific objects and advantages of the invention will become apparent from the following description and the accompanying drawings.

Examples of sanitary napkins in accordance with this invention are shown in the accompanying drawings, in which:

FIG. I is a plan view of a sanitary napkin embodying features of this invention;

FIG. 2 and FIG. 3 are sectional views of FIG. 1, taken on the lines 2-2 and 33, respectively;

FIG. 4 and FIG. 5 are sectional views respectively corresponding to FIG. 2 and FIG. 3, which illustrate another embodiment of this invention; and

FIG. 6 and FIG. 7 are sectional views respectively corresponding to FIG. 2 and FIG. 3, which illustrate a further embodiment of this invention.

Referring now to FIGS. 1 to 3, the body portion of the sanitary napkin embodying this invention comprises two layers 8 and 8a of absorbent material such as cotton, creped tissue paper, or other well-known absorbent equivalents. Between the layers 8 and 8a there is interposed a barrier sheet 9 of liquid repellent material which is preferably half as long as the layers. The barrier sheet consists of thin films of synthetic resins such as polyethylene, polypropylene and the like, which do not form a gel upon contact with'liquid and are completely liquid repellent; waterproof papers or tissue papers treated with a suitable water-repellent such as aluminum acetate, wax emulsions, wax emulsions plus aluminum salts, wax solution in organic solvent, polymerized silicone resins, organosilicone polymers, long chain pyridinium compounds, wax zirconium acetate emulsions, oil, etc.; and papers or tissue papers coated or laminated with said thin films of synthetic resins.

The two absorbent layers 8 and 8a and a waterproof strip 10 placed under the layer 8a are enclosed in an outer wrapper 11 which may consist of a conventional material used as covers for sanitary napkins, such as woven or nonwoven fabrics of rayon, cotton, or other suitable fibrous materials. Although the waterproof strip 10 which may consist of a well known and conventional material is approximately as wide as the absorbent layers as shown in FIG. 2, it may be wider than the latter.

Referring to FIGS. 4 and 5, the body portion of thesanitary napkin of this invention comprises three layers 8, 8a, and 8b of absorbent material. A barrier sheet 9 is placed centrally between the layers} and 8a, and two barrier sheets 9a and 9b are interposed separately between the layers 8a and 8b whereby the barrier sheet 9 overlaps at the edges thereof partly the barrier sheets 9a and 9b with the layer 8a as intermediate, as illustrated in FIG. 4. It is desirable that the three barrier sheets 9, 9a, and 9b have each an approximately onesixth to one-third length of the absorbent layers. Under the absorbent layer 8b a waterproof strip 10 is placed. The main body so obtained is enclosed in an outer wrapper l 1.

FIGS. 6 and 7 are longitudinal and cross sections of a sanitary napkin of this invention, respectively, in which napkin the central barrier sheet 9 is disposed under the intermediate absorbent layer 8a and the side barrier sheets 9a and 9b above the same layer 8a. When liquid is applied to the surface of a sanitary napkin in accordance with this invention, it penetrates downwardly at the point of application to the barrier sheet whereupon it is caused to spread laterally and longitudinally along the barrier sheet. The liquid overfiowed from the barrier sheet penetrates again into the absorbent layer below. Thus the absorbing capacity of the absorbent layers in the sanitary napkin of this invention is utilized effectively, by the action of the barrier sheets.

What is claimed is:

1. A sanitary napkin comprising three layers of absorbent material, one barrier sheet of liquid repellent material interposed centrally between the upper and middle absorbent layers, two barrier sheets of liquid repellent material interposed separately between the middle and lower absorbent layers so that the central barrier sheet overlaps at its edges partly the two side barrier sheets with the middle absorbent layer as intermediate, said three barrier sheets being completely liquid repellent, a waterproof strip placed under the lower absorbent layer, and an outer wrapper.

2. A sanitary napkin comprising three layers of absorbent material, one barrier sheet of liquid repellent material interposed centrally between the middle and lower absorbent layers, two barrier sheets of liquid repellent material interposed separately between the upper and middle layers so that the two side barrier sheets overlap at their inside edges partly the central barrier sheet with the middle absorbent layer as intermediate, said three barrier sheets being completely liquid repellent, a waterproof strip placed under the lower absorbent layer, and an outer wrapper.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1643615 *Aug 30, 1926Sep 27, 1927Harry S WilliamsSanitary napkin
US1843037 *Jul 19, 1928Jan 26, 1932Johnson & JohnsonSanitary napkin
US1863333 *Dec 10, 1929Jun 14, 1932Int Cellucotton ProductsAbsorbent pad
US2464640 *May 25, 1945Mar 15, 1949Int Cellucotton ProductsSanitary napkin
US2566325 *Mar 1, 1949Sep 4, 1951Personal Products CorpSanitary products
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3888257 *Oct 1, 1973Jun 10, 1975Parke Davis & CoDisposable absorbent articles
US4029101 *Nov 13, 1975Jun 14, 1977Colgate-Palmolive CompanyAbsorbent article
US4057061 *Dec 18, 1975Nov 8, 1977Kabushiki Kaisha AngelSanitary napkin
US4315507 *Apr 11, 1980Feb 16, 1982Kimberly-Clark CorporationSanitary napkin with heat fusible baffle
US4713068 *Oct 31, 1986Dec 15, 1987Kimberly-Clark CorporationMultilayer-clothlike porous substrate and polyvinyl alcohol barrier
US4713069 *Oct 31, 1986Dec 15, 1987Kimberly-Clark CorporationBaffle having zoned water vapor permeability
US4758239 *Oct 31, 1986Jul 19, 1988Kimberly-Clark CorporationBreathable barrier
US4818600 *Dec 9, 1987Apr 4, 1989Kimberly-Clark CorporationLatex coated breathable barrier
US6503233Oct 2, 1998Jan 7, 2003Kimberly-Clark Worldwide, Inc.Absorbent article having good body fit under dynamic conditions
US6667424Apr 12, 2000Dec 23, 2003Kimberly-Clark Worldwide, Inc.Absorbent articles with nits and free-flowing particles
US6673982Oct 2, 1998Jan 6, 2004Kimberly-Clark Worldwide, Inc.Absorbent article with center fill performance
US6695827Nov 27, 2002Feb 24, 2004Kimberly-Clark Worldwide, Inc.Absorbent article having good body fit under dynamic conditions
US7264615 *Apr 3, 2001Sep 4, 2007Kimberly-Clark Worldwide, Inc.Absorbent insert for use with an outer absorbent garment
US7265258Sep 12, 2003Sep 4, 2007Kimberly-Clark Worldwide, Inc.Absorbent articles with nits and free-flowing particles
US7300547Nov 6, 2003Nov 27, 2007Georgia-Pacific Consumer Products LlcWetting a celluloic web with an aqueous dispersion of wax and emulsifier; fusing the melted wax to provide a hydrophobic surface on the web and so that the open interstitial microstructure between fibers is preserved; a moisture penetration delay of >2 second; napkins; towels; tissues; repulpable
US7429689Sep 15, 2003Sep 30, 2008Kimberly-Clark Worldwide, Inc.Absorbent article with center fill performance
US7799169Nov 22, 2004Sep 21, 2010Georgia-Pacific Consumer Products LpMulti-ply paper product with moisture strike through resistance and method of making the same
US7846296Oct 16, 2007Dec 7, 2010Georgia-Pacific Consumer Products Lppaper tissue comprising a cellulosic fibrous web, having wax being disposed in the web so that the open interstitial microstructure between fibers is substantially preserved; hydrophobic surface exhibiting a moisture penetration delay of at least 2 seconds; nonabsorbent; microbial barrier
US7976523 *Dec 10, 2002Jul 12, 2011Japan Absorbent Technology InstituteAbsorbent product with nonpermeable surface sheet
US8025764Aug 31, 2010Sep 27, 2011Georgia-Pacific Consumer Products LpMulti-ply paper product with moisture strike through resistance and method of making the same
US8123905Mar 23, 2010Feb 28, 2012Georgia-Pacific Consumer Products LpAbsorbent sheet exhibiting resistance to moisture penetration
US8216424Nov 13, 2009Jul 10, 2012Georgia-Pacific Consumer Products LpMulti-ply paper product with moisture strike through resistance and method of making the same
US8314285 *Mar 1, 2004Nov 20, 2012The Procter And Gamble CompanyPantiliner
US8361278Sep 16, 2009Jan 29, 2013Dixie Consumer Products LlcFood wrap base sheet with regenerated cellulose microfiber
US8387165 *Nov 12, 2010Mar 5, 2013Nailah SakinDisposable and reusable germ screen
US8445743Apr 21, 2005May 21, 2013The Procter & Gamble CompanyWearable article enhancing awareness of urination
US8506756Mar 4, 2009Aug 13, 2013Sca Tissue FranceEmbossed sheet comprising a ply of water-soluble material and method for manufacturing such a sheet
US8631513Feb 8, 2013Jan 21, 2014Nailah SakinDisposable and reusable germ screen
US8771466Jul 2, 2013Jul 8, 2014Sca Tissue FranceMethod for manufacturing an embossed sheet comprising a ply of water-soluble material
WO1981001358A1 *Nov 11, 1980May 14, 1981R NuortieAbsorbent product and method of making the same
Classifications
U.S. Classification604/370, 604/374, 604/381, 604/377
International ClassificationA61F13/15
Cooperative ClassificationA61F13/53713, A61F2013/51409, A61F2013/53445, A61F13/534, A61F13/53717, A61F13/53743, A61F13/53704
European ClassificationA61F13/537B4, A61F13/537A, A61F13/537B2, A61F13/537C