Underpants-type disposable diaper

Abstract

An underpants-type disposable diaper is of a size and a water absorption capacity suitable for infants 3 to 6 years old, and is capable of preventing the protrusion of the groin portion of the diaper in use so that leakage does not occur. The leakage can be avoided by increasing the size and the water absorption capacity of the diaper main body 110 to a level suitable for infants 3 to 6 year olds still using diaper and at the same time improving the tracks of a plurality of elastic members 170 disposed along the peripheral edges of leg holes 130 so as to reduce the elasticity in the vertical direction of the crotch section and prevent the protrusion of the groin when the diaper is worn.

Description

CROSS REFERENCE TO THE RELATED APPLICATION [0001] Priority is claimed on Japanese Patent Application No. 2004-289868, filed Oct. 1, 2004, the content of which is incorporated herein by reference. FIELD OF THE INVENTION [0002] The present invention relates to a leak-resistant underpants-type disposable diaper, and specifically relates to an underpants-type disposable diaper having a size and an absorption capacity usable for infants of 3 to 6 years old who are still in diapers, and capable of preventing a groin portion of the diaper from outwardly protruding in use. RELATED ART [0003] Recently, the quality of disposable diaper has been dramatically improved so that most infants wear disposable diapers. There are two types of disposable diapers. One is a type which opens up and has attachment tapes (tape-type), and the other is a type underpants-shaped type (underpants-type). The tape-type disposable diaper is to be fixed to the body with tape at two positions around the waist, and it...

AI Technical Summary

Benefits of technology

[0006] The present invention has been made in view of the above-described problems and aims to provide an underpants-type disposable diaper usable for infants 3 to 6 years old who are still in diapers, and capable of preventing the groin portion from protruding while it is worn so as to provide a leak-resistant underpants-type diaper.

[0007] The present inventor has actively researched to solve the aforementioned problems. As a result, the inventor found that the groin portion can be prevented from protruding in use by careful arrangement of a plurality of elastic members disposed along the peripheral edges of the leg holes, thereby reducing the vertical movement of the groin portion even when the size and the absorption capacity of the diaper main body are increased to a level usable for infants of 3 to 6 years old who are still in diapers, and the inventor has achieved the present invention. More specifically, the present invention provides the following. (1) An underpants-type disposable diaper including an underpants-formed diaper main body,

Problems solved by technology

Thus, the discontinuation of diaper use has been delayed in recent years such that older infants use disposable diapers.

Therefore, the close contact between the diaper and the body can be maintained even when the wearer moves such as in walking, because the central elastic member can expand and contract in conjunction with the tension and shrinkage of these both side elastic members, However, in the invention according to the patent reference 1, vertical movement of the groin portion cannot be prevented, so that the problem that the groin portion protrudes in use cannot be sufficiently avoided.

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