Disposable diaper

A disposable diaper comprising:

• a front waistline region;
• a rear waistline region;
• a crotch region positioned between the front waistline region and the rear waistline region;
• a pair of leg hole opening units;
• an absorber running across the crotch region and extending in the front waistline region and rear waistline region;
• a product longitudinal direction from the front waistline region towards the rear waistline region;
• a product widthwise direction that is perpendicular to the product longitudinal direction;
• a pair of leg elastic members opposing each other in the product widthwise direction;
• a waistline retaining unit extending along the product widthwise direction in the front waistline region and the rear waistline region, and adapted to hold the disposable diaper onto a body of a wearer;
• a crotch stretch unit arranged in the crotch region and configured to be expanded and contracted in the product longitudinal direction or the product widthwise direction;
• a first inflected unit arranged in the absorber and defining a first curved base point of the disposable diaper by extending along the product widthwise direction;
• and
• a second inflected unit arranged in the absorber and defining the curved base point of the disposable diaper by extending along the product widthwise direction, the second infected unit being positioned between the rear waistline region and the first inflected unit;
• wherein
• the crotch stretch unit does not intersect the leg elastic members in a plan view of the disposable diaper,
• the absorber is configured to bend along the first inflected unit and the second inflected unit,
• when the disposable diaper is worn, as compared to other portions of the absorber, the crotch stretch unit maintains a flat shape,
• the absorber includes an absorbent material, and
• the first and second inflected units include parts of the absorbent material.

A disposable diaper comprising:

• a front waistline region;
• a rear waistline region;
• a crotch region positioned between the front waistline region and the rear waistline region;
• a pair of leg hole opening units;
• an absorber running across the crotch region and extending in the front waistline region and rear waistline region;
• a product longitudinal direction from the front waistline region towards the rear waistline region;
• a product widthwise direction that is perpendicular to the product longitudinal direction;
• a waistline retaining unit extending along the product widthwise direction in the front waistline region and the rear waistline region, and holding the disposable diaper onto a body of a wearer;
• a crotch unit that is formed in the crotch region and can be expanded and contracted in the product longitudinal direction or the product widthwise direction;
• a first inflected unit that is formed in the absorber and that becomes a curved base point of the disposable diaper by extending along the product widthwise direction;
• and
• a second inflected unit that is formed in the absorber, that becomes the curved base point of the disposable diaper by extending along the product widthwise direction, and that is positioned towards the rear waistline region from the first inflected unit;
• wherein
• the crotch unit is provided independently from the waistline retaining unit without intersecting the waistline retaining unit,
• a size along the product longitudinal direction of the crotch unit is 30 mm or more and 150 mm or less, in a natural state of the disposable diaper,
• in the absorber, a low rigidity unit in which an absorbent core configuring the absorber does not exist or a basis weight of the absorbent core is lower than that of the other portion, is formed in a region of edges of the product longitudinal direction from the crotch unit,
• in the absorber, a notch in which the absorbent core configuring the absorber does not exist is formed,
• a length of the notch in the product longitudinal direction is configured to widen as the notch moves towards an outer side of the product widthwise direction, and
• edges of the notch towards the front waistline region or the rear waistline region are configured to be in a shape of an arc.

A disposable diaper comprising:

• a front waistline region;
• a rear waistline region;
• a crotch region positioned between the front waistline region and the rear waistline region;
• a pair of leg hole opening units;
• an absorber running across the crotch region and extending in the front waistline region and rear waistline region;
• a product longitudinal direction from the front waistline region towards the rear waistline region;
• a product widthwise direction that is perpendicular to the product longitudinal direction;
• a waistline retaining unit extending along the product widthwise direction in the front waistline region and the rear waistline region, and holding the disposable diaper onto a body of a wearer;
• a crotch unit that is formed in the crotch region and can be expanded and contracted in the product longitudinal direction or the product widthwise direction;
• a first inflected unit that is formed in the absorber and that becomes a curved base point of the disposable diaper by extending along the product widthwise direction;
• and
• a second inflected unit that is formed in the absorber, that becomes the curved base point of the disposable diaper by extending along the product widthwise direction, and that is positioned towards the rear waistline region from the first inflected unit;
• wherein
• the crotch unit is provided independently from the waistline retaining unit without intersecting the waistline retaining unit,
• a size along the product longitudinal direction of the crotch unit is 30 mm or more and 150 mm or less, in a natural state of the disposable diaper,
• a width of the crotch unit along the product widthwise direction is narrower than a width of the absorber along the product widthwise direction in a region overlapping the crotch unit, and
• a difference between the width of the crotch unit along the product widthwise direction and the width along the product widthwise direction in the portion having the narrowest width of an absorbent core configuring the absorber in the region overlapping the crotch unit is 20% or less.