Unicharm Corporation

Shunsuke Masaki

Yuki Hashino

Toshiyasu Yoshioka

Masumi Fukuzawa

Shunsuke Takino

Yoshio Ono

Seiichi Kuwano

Sarinee Phichetkitjawat

In a pull-on diaper, a first distance dimension between outer end portions of front and rear waist panels is in a range of 300 mm to 400 mm as measured on the diaper flatly developed after coupling of the front and rear waist panels in seam regions has been released. A second distance dimension between the waist elastic closest to an inner end portion of the front waist panel among waist elastics extending in the front waist panel across the respective seam regions in the front waist panel and the waist elastic closest to an inner end portion of the rear waist panel among waist elastics extending in the rear waist panel across the respective seam regions is at least 55% of the first distance dimension between outer end portions of the front and rear waist panels.

Pull-on diaper

A pull-on diaper for younger baby has a transverse direction and a longitudinal direction, front and waist regions, a crotch region, and rear waist regions and leg cuffs extending along respective laterals of the crotch region. Each of front and rear waist panels is sectionalized into a first elastically contractible region and a second elastically contractible region wherein a dimensional ratio in the longitudinal direction between the first elastically contractible region and the second elastically contractible region is in a range of 1:1.6 to 1:2.2 and an elongation ratio of waist elastics attached to the first elastically contractible region is lower than an elongation ratio of the waist elastics attached to the second elastically contractible region and the elongation ratio of the waist elastics attached to the second elastically contractible region is lower than an elongation ratio of leg cuff elastics.

A pants-type wearing article that provides effective buttocks covering having a front panel, a rear panel and a crotch panel connected to the front panel and the rear panel so as to cover a crotch region of the article wearer. The rear panel is formed with a rear waist covering portion having a dimension in the longitudinal direction substantially the same as a dimension of the front panel and a buttocks covering portion contiguously extending downward from the rear waist covering portion and adapted to cover at least partially the wearer's buttocks. The buttocks covering portion has buttock elastics extending in the transverse direction. The buttocks covering portion and the crotch panel are joined to each other in a zone defined between the gasket cuffs opposite to each other in the transverse direction and not joined to each other at portions in which the gasket cuffs are disposed.

Pants-type absorbent wearing article with buttocks covering portion

A wearing article having a waist-opening that can be easily folded back along a fold line extending in a transverse direction without increasing the stiffness in the vicinity of the waist-opening. A diaper includes front and rear waist members and a crotch member. A liquid-absorbent structure of the crotch member is formed outboard of in a longitudinal direction of a core with front and rear flaps exclusively composed of an absorption surface wrapping sheet, a leakage-barrier sheet and a bottom surface wrapping sheet. The front and rear waist members include first regions overlapping the front and rear flaps, respectively, second regions lying adjacent to the associated first regions and third regions lying adjacent to the associated second regions. The front and rear waist members are provided with the first, second and third waist elastics attached between respective inner and outer sheets in the first, second and third regions, respectively. A tensile stress of the first regions and the third regions is adjusted to be lower than that of the second regions.

Wearing article

An interior body of a disposable diaper includes a liquid-permeable front sheet, a liquid-impermeable back sheet and a liquid-retaining absorbent core. The front sheet has a single sheet including spunbond layers on the front side and back side and a melt blown layer between the spunbond layers. The absorbent core has fiber aggregates and super-absorbent polymer particles. The front sheet is directly bonded to the skin side surface of the absorbent core. The length of the front sheet is longer than the length of the absorbent core, so that the front sheet has extended sections which extend outward in the lengthwise direction from both ends of the absorbent core in the lengthwise direction, while the extended sections are each continuously connected in the transverse direction with the front sheet or back sheet which overlaps with the extended section. The extended sections can directly contact the skin of the wearer.

Absorbent article

The present invention aims to provide a wearing article adapted to prevent unintentional displacement of a crotch region relative to front and rear waist regions by elastics attached to the crotch region. A diaper includes front and rear waist members, a crotch member by the intermediary of which the front and rear waist members are connected with each other. The rear waist member is formed with a waist fit section and an appendix section. Of the crotch member, front and rear ends including front and rear end flaps are bonded to the front and rear waist members, respectively, to form front and rear bonded regions. Both side flaps are provided on respective inner surfaces thereof with gasket elastics attached thereto. Each of the gasket elastic overlaps at one end with a part of the front waist elastic and overlaps at the other end with a part of the appendix section elastic. Furthermore, the one end overlaps with the front bonded region and the other end overlaps with the rear bonded regions.

Wearing article with bonded gasket elastic

A wearing article configured to smooth out wrinkles that tend to be created in front and rear waist regions. A diaper includes front and rear waist members connected to an intermediary crotch. The front and rear waist members extend from waist ends toward the side of a crotch region and respectively include first regions overlapping front and rear end flaps of the absorbent structure and second regions adjacent the respective first regions. In the front and rear waist members, the first regions and the second regions are provided with first and second waist elastic members sandwiched between the respective top- and backsheets. The respective second regions are formed with inelastic zones overlapping the core and elastic regions lying on both sides of the inelastic regions in the transverse direction. The tightening force of the first regions are lower than the tightening force of the respective second regions.

Wearing article with differential tightening forces in the waist regions

A disposable diaper is provided with an outer body including a belly side portion and a back side portion, and an inner body. The belly side portion and back side portion of the outer body each has a plurality of waist elastic members extending in parallel to each other in the transverse direction. The outer body has an annular waist gather region, a belly side pressing region, a back side pressing region, and an annular tightening region. The area of the back side pressing region is smaller than the area of the belly side pressing region, and the contractile force of the back side pressing region is smaller than the contractile force of the belly side pressing region, and is no greater than 0.35N, and the contractile force per unit width of the tightening region is no less than 0.45N/25 mm.

Growing community of inventors

Kanonji, Japan

Shunsuke Masaki