Underpants type disposable diaper

摘要

A disposable diaper which can be used both as a tape-fastening type and an underpants type by joining the both side portions of the front body part and back body part respectively to thereby form joined portions on both sides along with a waist opening and a pair of right and left leg openings and in this diaper, perforated lines are formed on the both side portions of the front body part so as to extend from an edge of the waist opening to edges of the leg openings and at least one pair of fastening tapes having hook members on inner surfaces thereof and straddle the perforated lines.

主权项

1. An underpants type disposable diaper, comprising: a front body part and a back body part which are jointed to each other at both side portions thereof to thereby form joined portions on both sides, a waist opening, and a pair of right and left leg openings;
an absorbent main unit which is a portion that receives, absorbs and retains excreted objects and extends to a crotch and portions on both front and back sides of the crotch; and a plurality of elongated resilient and elastic members which are fixed anywhere in an area from the waist opening to the leg openings of the front and back parts and a lengthwise direction of said resilient and elastic members extends in a width direction of the diaper, and wherein perforated lines are formed in the front body part or back body part so as to extend from an edge of the waist opening to edges of the leg openings, said perforated lines being provided in width direction positions that are separated so as to be closer to a middle area in a width direction than said joined portions and are separated so as to be closer to an outward area in a width direction than said absorbent main unit, the resilient and elastic members are arranged on both sides of the perforated lines such that ends thereof facing to the perforated lines are placed at the same positions as the perforated lines or near the perforated lines, at least one pair of right and left fastening tapes each having only one engagement section that is provided on an inner surface thereof and straddles one of the perforated lines, said fastening tapes being provided within width direction ranges that are separated so as to be closer to said middle area in said width direction than said joined portions and separated so as to be closer to said outward areas in said width direction than said absorbent main unit, and each one of the at least one pair of fastening tapes is detachably engaged on an external surface of the diaper by the engagement section that straddles both sides of one of the perforated lines, and said tape is completely separated, for its entirety, from the external surface of the diaper by releasing the engagement of the engagement sections.