Disposable diaper
AssigneeDaio Paper Corporation
InventorMasahiro Kaneda
Life of this patent
Estimating the term…
Abstract
[Problems] To improve the air permeability of a waist portion of a disposable diaper [Means for Solving Problems] In an underpants type disposable diaper, including: a ventral-side outer sheet 12F and a back-side outer sheet 12B which are not connected but separated at a crotch portion; an absorber 20 having a liquid impervious sheet and a crotch outer sheet 12M laminated on an underside of the liquid impervious sheet in the absorber so as to be exposed on an external surface of a product, assuming that the number of sheets disposed on the underside of the liquid impervious sheet is B1 at the intermediate portion 23, A1 at front- and back-side outer overlap sections X and Z, and C1 at the front- and back-side outer nonoverlap sections 20F and 20B, there is established a relationship of B1<C1<A1.
Claims16
An underpants type disposable diaper, comprising:
- a barrel-shaped waist portion that includes a ventral-side outer sheet for covering a waist of a wearer on a ventral side and a back-side outer sheet for covering a waist of a wearer on a back side, in which the ventral- and back-side outer sheets are joined together at joined sections at edges on the both sides in a width direction, and the ventral- and back-side outer sheets are not connected but separated at a crotch portion;
- and
- an absorber that is connected at a front end portion to the ventral-side outer sheet on an inner surface at a central portion in the width direction and is connected at a back end portion to the back-side outer sheet on an inner surface at a central portion in the width direction, in which an intermediate portion between the front and back end portions is exposed to outside from a separation area between the ventral- and back-side outer sheets at the crotch portion, wherein
- the absorber has a liquid pervious top sheet arranged on a top side, a liquid impervious sheet arranged on an underside, and an absorbent element interposed between the foregoing sheets to absorb and retain a liquid,
- a crotch outer sheet is laminated on an underside of the liquid impervious sheet in the absorber so as to be exposed to on an external surface of a product, and
- the crotch outer sheet is higher in stiffness than sheets constituting the ventral- and back-side outer sheets.
Dependencies are inferred from the claim text.