Unicharm Corporation

Mitsui Petrochemical Industries, Ltd.

Hisashi Takai

Tomoko Tsuji

Miou Suzuki

Hiroki Goda

Takayuki Hisanaka

Koichi Yamaki

Tsutomu Kido

Takayoshi Konishi

Takamitsu Igaue

Masashi Nakashita

Kazuya Okada

Shizuo Shimizu

Kazunari Nishino

Shigeyuki Motomura

Junichi Noguchi

Yoshitaka Mishima

Yasuhiko Kenmochi

Hironao Minato

Kaiyo Nakajima

Hideyuki Ishikawa

Masaki Yoshida

Sachiyo Suzuki

Hideki Kondo

Koichiro Mitsui

Takayuki Miyoshi

Maki Watanabe

Kaori Yamauchi

Akira Shibata

Provided are an absorbent and an absorptive article containing the absorbent which has excellent water absorbability and leakage prevention ability, and has an intent to achieve reductions in the weight and thickness of an absorptive article. The absorbent comprises a polysaccharide that causes a gelation reaction in the presence of a polyvalent metal ion and a source of the polyvalent ion, in which the polyvalent ion is supplied simultaneously with or after dissolution and swelling of the polysaccharide. The absorptive article containing the absorbent can achieve excellent water absorbability and leakage prevention ability and thus reductions in the weight and thickness as the absorptive article.

Absorber forming crossbridge upon absorbing

A water-absorbent structure comprises an assembly of thermoplastic synthetic fibers, cellulose-based fibers, super-absorbent polymer and water-pervious sheets wrapping these components together. The assembly is a honeycomb construction having a plurality of through-holes and normally in a compressed state. Upon water permeation into the water-absorbent structure, the super-absorbent polymer is swollen and softened and the assembly is swollen so that the through-holes restore the initial state before the assembly has been compressed.

Water-absorbent structure and process for making the same

Disclosed is a water disintegratable sheet including bast/leaf fibers and at least one kind of primary fibers. The bast/leaf fibers have a Canadian Standard freeness value of at most 600 milliliter and occupy 2 to 75% by weight of a total fiber weight of the sheet.

Water-disintegratable sheet and manufacturing method thereof

Disclosed is a water disintegratable sheet of which fibers are hydroentangled about each other. The water disintegratable sheet includes: at least one kind of primary fibers having a fiber length of at most 10 millimeter; and bast/leaf fibers having a Canadian Standard freeness value of at most 600 milliliter and a fiber length of at most 10 millimeter.

A disposable diaper includes a pair of tape fastenersthat are used to connect front and rear waist regionsto each other and are attached to side flapsin the rear waist regionof the diaper. Each of the tape fastenersincludes fibrous nonwoven fabric made of thermoplastic synthetic resin fiber and thermoplastic synthetic resin coated on a substantially whole area of an outer surface of the fibrous nonwoven fabric wherein the thermoplastic synthetic resin forms a substantially smooth synthetic resin layer on outer surfaces of the respective tape fasteners. Thus, a free portion of each tape fastener is reliably prevented from being disengaged from a target tape even when the outer surface of the tape fastener and an inner surface of an underwear rub together during use of the diaper.

Diaper fastener with two nonwoven fabric components coated with thermoplastic synthetic resin

An indicator interposed between a liquid-impervious sheet and an absorbent core of a body fluid absorbent article includes a water-absorbent sheet and indication elements held in close contact with the water-absorbent sheet. The water-absorbent sheet is preferably formed from porous thermoplastic films having a total luminous transmittance of 40% or lower in a dry state and 60% or higher in a wet state.

Indicator on body fluid absorbent article

A topsheet for a disposable wearing article that is formed with a plurality of fine openings each having an area of about 0.16-5 mm and a part of the peripheral edge of each opening is protuberated upward from an upper surface of the topsheet. The topsheet is thereby improved so that body fluids can be rapidly absorbed and stuffiness as well as eruption of the wearer's skin can be reliably avoided.

Topsheet made of nonwoven fabric used in disposable wearing article

A disposable body fluid absorbent wearing article includes a liquid-pervious topsheet including plastic film layer sections, liquid-pervious openings and a first fibrous layer bonded to the lower surface of the film layer sections. A second fibrous layer forming a liquid-absorbent core is contiguous to the lower surface of a first fibrous layer and a third fibrous layer is contiguous to the lower surface of the second fibrous layer. The wearing article is constructed so that its Klemm's water absorbency may progressively increase in the order of the first fibrous layer, the second fibrous layer and the third fibrous layer.

Disposable body fluid absorbent wearing article

Disclosed is a water-disintegratable sheet including water-dispersible fibers and microfibrillated cellulose. The water-dispersible fibers are hydroentangled about each other to provide high fiber density regions and low fiber density regions. The hydroentangled water-dispersible fibers are bonded to each other through a hydrogen bonding power of the microfibrillated cellulose.

A flexible composite sheet that includes a fibrous assembly and a plurality of narrow film strips bonded to upper surface of the fibrous assembly. The narrow strips are intermittently arranged so that the fibrous assembly may be exposed between each pair of the adjacent narrow strips. Sides defining each of the narrow strips are formed with tooth-like portions.

Flexible composite sheet and process for making the same

A topsheet for a disposable absorbent article including a first plastic film layer, a second plastic film layer and a fibrous assembly layer disposed between these two layers. The first plastic film layer includes a plurality of first plane regions spaced one from another and extending in parallel one to another in one direction and the second plastic film layer includes a plurality of second plane regions spaced one from another and extending in parallel one to another in the one direction. Of the first and second plane regions, at least the first plane regions are formed with bridge-like regions and first rising regions.

Liquid-pervious topsheet for disposable absorbent article and process for making the same

Disclosed are a method and an apparatus for manufacturing a non-woven fabric, in which a predetermined pattern of a forming body is transferred to a non-woven fabric immediately after or simultaneously with its formation by urging the non-woven fabric onto the forming body with water jets.

Method and apparatus for manufacturing non-woven fabric

A composite sheet comprises a hydrophobic first plastic film layer forming an upper surface of the sheet, a second plastic film layer forming a lower surface of the sheet and a hydrophobic intermediate fibrous assembly layer disposed between these two layers. The first plastic film layer includes a plurality of first plane regions spaced one from another and extending parallel one to another in one direction and sawtooth-shaped first rising regions formed along edges of the first plane regions and the second plastic film layer includes a plurality of second plane regions. Such composite sheet is breathable but liquid-resistant and suitable for use for disposable garments.

Composite plastic sheet and process for making the same

A flexible sheet for disposable sanitary article includes a plurality of aperture-arrays each having a plurality of apertures, a plurality of plane regions arranged so that each pair of the adjacent plane regions have one of the aperture-arrays therebetween and a plurality of regions rising on the plane regions along their peripheral edges surrounding the respective apertures to form irregular undulations. The rising regions each defining on both sides, trough regions having a depth of at least 0.01 mm which are distributed over the flexible sheet at a density of at least 500/cm .

Growing community of inventors

Kagawa-ken, Japan

Hisashi Takai