TW202002924A - Pull-on disposable diaper - Google Patents

Abstract

A pull-on disposable diaper (1) is provided with a front-side belt section (21), a rear-side belt section (22), and an absorbent core (11), wherein: a base region (21s) and a high-pressure region (30s) are provided; and the high-pressure region (30s) is disposed circumferentially across the front-side belt section (21) and the rear-side belt section (22), includes a stretchable film (30) between skin-side non-woven fabric (213, 223) and non-skin-side non-woven fabric (214, 224), includes a ventilation section (34) that has better ventilation properties than the portion where the stretchable film (30) is located, and does not overlap with the absorbent core (11) in at least the front-side belt section (21) or the rear-side belt section (22).

Description

Disposable disposable diapers

The present invention relates to shorts-type disposable paper diapers.

As the first prior art, Patent Document 1 describes a pant-type disposable disposable diaper in which both side edges of the abdomen side and both side edges of the back side are joined to each other. The back side portion is provided with a first body portion elastic member and a second body portion elastic member which are superimposed on the auxiliary body portion elastic member arranged parallel to the width direction (left-right direction) of the paper diaper. The first main body elastic member and the second main body elastic member are arranged such that when the paper diaper is worn, the intersection thereof abuts on the wearer's greater trochanter. In Japanese Patent Document 2, a stretchable sheet different from the two sheets included in the outer wrapping material of the disposable type disposable diaper is arranged to form a high installation pressure area. The high installation pressure area is configured to abut from the wearer's intestinal rib to the anterior superior spine of the iliac bone. As in Patent Documents 1 and 2, by partially improving the adhesion between the abdominal side and the back side (front belt portion and rear belt portion) of the paper diaper, the tightness of the paper diaper can be improved, and deflection can be suppressed.

As a second prior art, Patent Document 1 describes a pant-type disposable disposable diaper in which both side edges of the abdomen side and both side edges of the back side are joined to each other. The back side of the paper diaper of Patent Document 1 includes a first body elastic member and a second body elastic member. The first main body elastic member and the second main body elastic member are arranged such that their intersections abut on the wearer's large rotor. Thereby, even if the paper diaper does not have a foot elastic member, there is no deviation and fall, and leakage can be prevented.

As a third prior art, Patent Document 2 discloses a pant-type disposable disposable diaper having an absorbent body and an outer covering material to which the absorbent body is fixed. The packaging material other than the paper diaper of Patent Document 2 has a structure in which two sheets are stacked, and has a high installation pressure area in which other stretchable sheets different from the two sheets are arranged. By making the high installation pressure area abut on the portion from the wearer's intestinal rib to the upper anterior intestinal rib, it is possible to effectively prevent the diaper from slipping off during wearing. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 5107760 [Patent Document 2] Japanese Patent No. 5020362

[Problems to be solved by the invention]

The problem to be solved by the present invention is at least one of the following first and second problems. In the first subject, in Patent Document 1, all elastic members are formed in a linear shape (rope shape). Therefore, there is a portion where the linear elastic members are overlapped and partially adhered to the wearer, and the marks (rubber marks) of the elastic member are easily generated on the wearer's skin. As in Patent Document 2, when a high installation pressure region is formed with a stretchable sheet, it becomes less likely that traces of an elastic member (stretchable member) will occur. As an example of the stretchable sheet, a stretchable film may be mentioned, but the stretchable film has poor air permeability. Therefore, as in Patent Document 2, if the stretchable film is arranged without a gap in the high installation pressure region, the air permeability of the high installation pressure region will decrease. Furthermore, in Patent Document 2, the stretchable film is exposed to the skin side of the wearer. Therefore, the stretchable film is likely to closely adhere to the wearer's skin without gaps, which may cause a further decrease in air permeability.

The present invention is an invention developed in view of the aforementioned problems, and an object of the present invention is to provide a method that can partially improve the adhesion between the front side belt portion and the rear side belt portion, and can also suppress the remaining traces of the stretchable member and reduce the air permeability. Short-use disposable diapers.

In the second subject, the first body elastic member of the paper diaper of Patent Document 1 extends from the edge of the foot opening toward the edge of the waist opening. That is, one end of the elastic member of the first body portion is located in the foot opening, and is contracted to expand the foot opening. Therefore, in the first body elastic member, it is difficult to obtain a tightening force that can support the wearer's motion (muscle strength). In addition, the second body elastic member extends from the side edge portion of the back side portion toward the center portion of the back side portion near the crotch portion. In other words, the second main body elastic member is located at a portion that is in contact with the gluteus maximus, which greatly expands and contracts muscles, skin, etc. due to the wearer's movement. Therefore, due to the action of the wearer, friction between the wearer and the paper diaper is likely to occur, and the wearing comfort of the paper diaper is reduced.

The present invention is an invention developed in view of the aforementioned problems, and an object of the present invention is to provide a short-sleeved disposable diaper that can support the motion of the wearer and is comfortable to wear.

In the third issue, when the wearer and caregiver of the paper diaper cannot grasp the position of the high installation pressure area (high pressure area), it is not easy to adjust the upward lifting degree of the paper diaper so that the high installation pressure area is located in the wearer The user's proper location. As a result, there will be no effect of high installation pressure area. Conversely, there will be areas where the high installation pressure is not necessary for tightening (such as the lower abdomen, the bulging part of the buttocks, etc.), which may reduce the wearing comfort of the paper diaper.

The present invention is an invention developed in view of the aforementioned problems, and its object is to allow shorts-type disposable diapers having a high-pressure area to be installed at an appropriate position of the wearer. [Means to solve the problem]

In order to achieve the aforementioned first subject, the main inventions are: A shorts-type disposable paper diaper with up and down directions, left and right directions, and front and back directions crossing each other, and having: Front belt part, rear belt part and absorbent body with absorbent core, The front side belt part and the rear side belt part form a shorts-type disposable disposable diaper with a waist opening formed at the upper end, characterized by: The front belt part and the rear belt part have: The nonwoven fabric on the skin side closest to the skin side, the nonwoven fabric on the non-skin side closest to the non-skin side, and the stretchable member that stretches in the left-right direction, It also includes: a telescopic area along the edge of the waist opening; A base area of the telescopic area adjacent to the center of the front-side belt portion in the left-right direction from below; and The high pressure area located below the aforementioned telescoping area, The force for extending the high-pressure area per unit width by the unit length in the left-right direction is greater than the force for extending the unit area in the unit width by the unit length in the left-right direction. The aforementioned high pressure area system It is provided in a circular shape throughout the front belt portion and the rear belt portion, There is a stretchable film between the non-skin on the skin side and the non-skin on the non-skin side, and It has a ventilation part that is better than the part where the aforementioned stretchable film exists, At least one of the front belt portion and the rear belt portion does not overlap with the absorbent core in the front-rear direction.

In order to achieve the aforementioned second subject, the main invention is a pant-type disposable disposable diaper having up and down directions, left and right directions, and front and back directions crossing each other, and the left and right sides of the front belt section and the back side The left and right sides of the belt part are a pair of pant-type disposable disposable diapers that are locked by a pair of locking parts, characterized in that the rear belt part has a low-pressure region and a high-pressure region. The low-pressure area and the high-pressure area are stretchable in the left-right direction, and the force for extending the high-pressure area of the unit width in the up-down direction toward the left-right direction by a unit length is used to extend the unit width The low-pressure area has a greater force to extend the unit length in the left-right direction, the high-pressure area is continuously arranged in the left-right direction over the range between the pair of locking portions, and the left-right direction of the high-pressure area Both end portions of the high-pressure area are longer in the up-down direction than the center portion, and the lower end of the high-pressure area is located on the lower side, and the low-pressure area is in the left-right center portion of the rear belt portion It is arranged adjacent to the lower side of the high-pressure region.

In order to achieve the aforementioned third problem, the main invention is a shorts-type disposable paper diaper, which has a vertical direction, a left-right direction and a front-back direction that cross each other, and has a belt portion and an absorbent body. The disposable paper diaper is characterized in that the belt portion is located below the stretchable area along the edge of the waist opening, and has a low pressure area and a high pressure area, the low pressure area and the high pressure area are adjacent and It has elasticity in the left-right direction, and the force for extending the high-pressure area of the unit width in the up-down direction toward the left-right direction by a unit length is compared to the direction of the low-pressure area of the unit width in the left-right direction. The force for elongating the unit length is greater, and when the belt portion is viewed from at least one of the non-skin side and the skin side, at least a part of the high-pressure region is a different color from the low-pressure region. Other features of the present invention will be more clear based on the description in this specification and the drawings. [Effect of the invention]

With respect to the effect of the first aspect of the present invention, it is possible to provide a pant-type disposable disposable type that can partially improve the adhesion between the front side belt portion and the rear side belt portion while suppressing the remaining traces of the elastic member and reducing the air permeability. Paper diapers.

With respect to the effect of the second aspect of the present invention, it is possible to provide a disposable disposable diaper that can support the motion of the wearer and is comfortable to wear.

With respect to the effect of the third aspect of the present invention, shorts-type disposable diapers having a high-pressure area can be installed in an appropriate position of the wearer.

Based on the descriptions in this specification and the drawings, at least the following items can be made clearer. A pant-type disposable disposable diaper having an up-down direction, a left-right direction and a front-back direction crossing each other, and having an absorbent body having a front belt portion, a rear belt portion and an absorbent core, by The front belt portion and the rear belt portion are shorts-type disposable disposable diapers with a waist opening formed at the upper end, characterized in that the front belt portion and the rear belt portion have skin located closest to the skin side Side nonwoven fabric, non-skin side nonwoven fabric located closest to the non-skin side, and a stretchable member that stretches in the left-right direction, and includes: a stretchable region along the edge of the waist opening; adjacent to the front belt section from below The base area of the telescoping area in the center in the left-right direction; and the high-pressure area provided below the telescoping area are used to extend the unit pressure of the unit width of the high-pressure area toward the left-right direction by a unit force, which is The base area of the unit width has a greater force to extend the unit length in the left-right direction, the high-pressure area is provided circumferentially so as to extend across the front belt portion and the rear belt portion, and the non-woven fabric and the There is a stretchable film between the non-skin side nonwoven fabrics, and it has a ventilating portion that is better than the portion where the stretchable film is present, and at least one of the front belt portion and the rear belt portion has absorbability The core material does not overlap in the aforementioned front-rear direction.

According to such a pants-type disposable diaper, the adhesion between the front belt portion and the rear belt portion can be partially improved, and positional deviation during wearing can be suppressed. In addition, since the high-pressure region has the stretchable film and the vent portion, it is possible to suppress the remaining marks of the stretchable member and the decrease in the breathability. In addition, since the stretchable film is located between the nonwoven fabric on the skin side and the nonwoven fabric on the non-skin side, damage to the stretchable film can be suppressed, and air permeability in the planar direction can be ensured with the wearer's skin.

In this pant-type disposable diaper, the stretchable member is a sheet-like member having air permeability.

According to such a shorts-type disposable paper diaper, since the front belt portion and the rear belt portion are in close contact with the wearer, the remaining traces of the stretchable member can be suppressed, and breathability can be ensured.

In the pants-type disposable paper diaper, the stretchable member is a stretchable nonwoven fabric, and the stretchable nonwoven fabric is disposed between the skin-side nonwoven fabric and the aforementioned non-skin-side nonwoven fabric and is arranged more than the stretchable film Close to the skin side.

According to such pants-type disposable paper diapers, a space (ventilation path) is easily formed between the wearer's skin and the airflow in the planar direction can be ensured.

In this pant-type disposable disposable diaper, the stretchable member is a stretchable nonwoven fabric, and in the stretchable area, a plurality of linear elastic materials that stretch in the left-right direction are performed at intervals in the up-down direction In the center of the left-right direction of the front belt portion, the length in the up-down direction from the upper end of the high-pressure region to the upper end of the front-side belt portion is longer than the length in the up-down direction of the high-pressure region.

According to such a shorts-type disposable paper diaper, the high-pressure area is not easily contacted around the belly button of the wearer who is prone to sweating, which can reduce the heat inside the paper diaper.

In the shorts-type disposable paper diaper, in the high-pressure region, the plurality of stretchable films long in the left-right direction are arranged at intervals in the up-down direction and arranged in the up-down direction The portion between the stretchable films is the vent.

According to such pants-type disposable paper diapers, it is possible to suppress a decrease in air permeability in the high-pressure area.

In this pant-type disposable disposable diaper, in the high-pressure region, the area of the portion where the stretchable film exists is larger than the area of the vent portion arranged between the stretchable films arranged in the up-down direction Bigger.

According to such shorts-type disposable paper diapers, it is possible to suppress the decrease in the air permeability in the high-pressure area and improve the adhesion in the high-pressure area, and it is possible to suppress the positional deviation during wearing.

In this pant-type disposable disposable diaper, in the left-right side portions of the front belt portion and the back side belt portion, the area of the vent portion is divided by the area compared to the center portion in the left-right direction The area of the high pressure area has a larger value.

According to such pants-type disposable disposable diapers, the ratio of the ventilation part in the high-pressure region is high on the lateral part in the left-right direction where the wearer's movements (the movements of the hips and feet) are large. Therefore, the obstruction of the wearer's movement can be prevented, and the ventilation in the high-pressure area can be improved. In addition, by firmly adhering the central portion in the left-right direction where the movement of the wearer is small to the wearer, it is possible to effectively suppress the positional deviation during wearing.

In this pant-type disposable paper diaper, the stretchable film system does not have openings penetrating the stretchable film.

According to such shorts-type disposable paper diapers, it is possible to suppress a decrease in the strength of the stretchable film due to openings. In addition, the shrinking force of the stretchable film can be effectively used.

In this pant-type disposable paper diaper, the stretchable film has an opening that penetrates the stretchable film, and the opening is the vent portion.

According to such pants-type disposable paper diapers, it is possible to suppress a decrease in air permeability in the high-pressure area.

In this pant-type disposable disposable diaper, the skin-side nonwoven fabric, the aforementioned non-skin-side nonwoven fabric, the stretchable member and the stretchable film are welded in the front-rear direction by the same welding pattern.

According to such shorts-type disposable paper diapers, the humid air inside the paper diaper can be efficiently released in the front-rear direction (thickness direction) in the front belt portion and the rear belt portion, and the air permeability can be improved .

In this pant-type disposable paper diaper, wherein the welding pattern is a pattern in which a plurality of welded portions are scattered, and in the state where the pant-type disposable paper diaper is extended, the area of the vent portion is relatively small The area of the welded portion located in the high pressure area is larger.

According to such a shorts-type disposable paper diaper, it is possible to suppress a decrease in the air permeability in the high-pressure area due to the welded portion.

A pair of pant-type disposable disposable diapers having up and down directions, left and right directions, and front and back directions crossing each other, both sides of the front side belt portion in the left and right direction and both sides of the rear side belt portion in the left and right direction A pair of pant-type disposable disposable diapers that are locked by a pair of locking portions, characterized in that the rear belt portion has a low-pressure area and a high-pressure area, and the low-pressure area and the high-pressure area are in the aforementioned It is stretchable in the left-right direction, and the force for extending the high-pressure area of the unit width in the up-down direction toward the left-right direction is longer than the unit for extending the low-pressure area of the unit width in the left-right direction. The force of the length is greater, the high-pressure region is continuously arranged in the left-right direction across the pair of locking portions, and both end portions of the high-pressure region in the left-right direction are higher than the central portion, the high-pressure region The length in the up-down direction is long, and the lower end of the high-pressure region is located below, and the low-pressure region is located adjacent to the high-pressure region at the central portion in the left-right direction of the rear belt portion.

According to such shorts-type disposable paper diapers, since the high-pressure area is connected to the front belt portion, it is possible to suppress a reduction in the tightening pressure of the high-pressure area. In addition, the high-pressure area is formed to fit the wearer's gluteus medius muscle, and the high-pressure area can tighten the gluteus medius muscle to support the wearer's movement (walking). In addition, the arrangement of the low-pressure region in combination with the gluteus maximus of the wearer can suppress excessive tightening of the gluteus maximus with large expansion and contraction, and can improve the wearing comfort of the paper diaper.

In this pant-type disposable disposable diaper, the lower end of the high-pressure region is inclined downward from the central portion in the left-right direction of the high-pressure region toward both ends.

According to such a pant-type disposable paper diaper, the high-pressure area is formed in a shape close to the wearer's gluteus medius, and the wearer's movement (walking) can be further supported.

In this pant-type disposable disposable diaper, which has an absorbent core, the high-pressure area is arranged in the front-rear direction so as not to overlap the rear side portion of the absorbent core, and the low-pressure area It is arranged at least between the lower end of the high-pressure region and the upper end of the rear side portion of the absorbent core.

According to such a shorts-type disposable paper diaper, the shrinkage of the absorbent core material due to the high-pressure area can be suppressed, and the wearing comfort of the paper diaper can be improved.

In this pant-type disposable disposable diaper, the front belt portion has a front-side elastic member that expands and contracts in the left-right direction, and the front-side elastic member extends continuously between the pair of locking portions. In the left-right direction, the high-pressure region is connected to the locking portion and connected to the front-side elastic member.

According to such shorts-type disposable paper diapers, the high-pressure area and the front elastic member are formed in a circular shape and fit snugly around the waist of the wearer, so that the positional displacement of the paper diaper can be suppressed. In addition, the tightening pressure in the high-pressure region is increased, which can further support the wearer's movement (walking).

In this pant-type disposable disposable diaper, wherein the front belt portion has a front low-pressure region that is elastic in the left-right direction; and a front high-pressure region that includes the front elastic member for using the front The force of extending the front high-pressure region of unit width in the up-down direction by the unit length in the left-right direction is greater than the force of extending the unit-length of the front low pressure region of the unit width in the left-right direction by the unit length. The high-pressure region is connected to the front high-pressure region at the locking portion.

According to such shorts-type disposable paper diapers, the high-pressure area and the front elastic member are formed in a circular shape and fit snugly around the waist of the wearer, so that the positional displacement of the paper diaper can be suppressed. In addition, the tightening pressure in the high-pressure region is increased, which can further support the wearer's movement (walking).

In this pant-type disposable disposable diaper, the front high-pressure area has a plurality of the front-side stretchable members at intervals in the vertical direction, and the high pressure area is at intervals in the vertical direction It has a rear elastic member that expands and contracts in the left-right direction, and in the locking portion, the uppermost front elastic member and the uppermost rear elastic member are connected, and the lowermost front elastic member It is connected to the lowermost retractable member on the rear side.

According to such shorts-type disposable paper diapers, the high-pressure area and the front elastic member are formed in a circular shape and fit snugly around the waist of the wearer, so that the positional displacement of the paper diaper can be suppressed. In addition, the tightening pressure in the high-pressure region is increased, which can further support the wearer's movement (walking).

In this pant-type disposable disposable diaper, the left and right ends of the front high-pressure region are longer than the central part at both ends, and the length of the front high-pressure region in the vertical direction is longer, And the upper end of the aforementioned high-pressure region on the front side is located above.

According to such shorts-type disposable paper diapers, the wearer's lateral gluteal muscles can be tightened by the front high-pressure area, and the wearer's movement (walking) can be further supported. In addition, the front high-pressure area can be restrained from tightening the wearer's abdomen, and the wearing comfort of the paper diaper can be improved.

In this pant-type disposable disposable diaper, the front low-pressure region is disposed adjacent to the front high-pressure region at the center portion of the front belt in the left-right direction.

According to such a pant-type disposable paper diaper, the front low-pressure area can be properly fitted on the wearer's abdomen, and the positional displacement of the paper diaper can be suppressed.

The pants-type disposable paper diaper has an absorbent core material, and the front high-pressure region is arranged in the front-rear direction so as not to overlap the front side portion of the absorbent core material.

According to such a shorts-type disposable paper diaper, the shrinkage of the absorbent core material due to the high pressure area on the front side can be suppressed, and the wearing comfort of the paper diaper can be improved.

In this pant-type disposable disposable diaper, wherein the high-pressure area has a plurality of rear elastic members that extend and contract in the left-right direction at intervals in the up-down direction, and the left-right direction of the high-pressure area Both end portions of the rear elastic member adjacent to each other in the up-down direction are wider than the center portion.

According to such shorts-type disposable paper diapers, the left and right ends of the high-pressure area have longer lengths in the vertical direction than the central portion of the high-pressure area. Therefore, the high-pressure area is formed to fit the wearer's gluteus medius muscle, and the wearer's movement (walking) can be supported.

In this pant-type disposable disposable diaper, the high-pressure area system has a rear elastic member that expands and contracts in the left-right direction, and the rear elastic member is a sheet-like member.

According to such shorts-type disposable paper diapers, since the high-pressure area fits into a wide range of the wearer's gluteus medius, it can further support the wearer's movement (walking). In addition, since the high-pressure area is close to the wearer, it is possible to prevent local tightening and to improve the comfort of wearing the diaper.

In this pant-type disposable paper diaper, in the high-pressure region, a stretchable nonwoven fabric and a stretchable film are arranged between the skin-side sheet and the non-skin-side sheet, and in the low-pressure region, on the skin The stretchable nonwoven fabric is arranged between the side sheet and the non-skin side sheet.

In addition, according to such shorts-type disposable paper diapers, since the high-pressure area and the low-pressure area are close to the wearer in the face, it is possible to prevent local tightening and to change the wearing comfort of the paper diaper good.

In this pant-type disposable diaper, a stretchable member is arranged along the pair of foot openings.

According to such a shorts-type disposable paper diaper, the elastic member of the foot circumference opening is in close contact with the wearer's foot circumference, so that the paper diaper can be prevented from being lifted up excessively. Therefore, the paper diaper can be correctly worn so that the high-pressure area is located in the wearer's gluteus medius.

A shorts-type disposable paper diaper with a vertical direction, a left-right direction and a front-back direction intersecting each other, and having a belt portion and an absorbent body, characterized in that the belt portion is attached to an edge along the waist opening Below the telescoping area, there are a low pressure area and a high pressure area, the low pressure area and the high pressure area are adjacent to each other and have elasticity in the left-right direction, and are used to increase the height of the unit width in the up-down direction The force that extends the unit length in the pressure area toward the left-right direction is greater than the force that extends the unit length to extend the unit-length low-pressure area toward the left-right direction, at least between the non-skin side and the skin side When viewing the belt portion on one side, at least a part of the high-pressure region is a different color from the low-pressure region.

According to such a shorts-type disposable diaper, the user can grasp the position of the high-pressure area, and the high-pressure area can be located at the tightening part of the wearer. Therefore, the paper diaper can be worn to the appropriate position of the wearer, and therefore, the effect by the high pressure area can be obtained. In addition, the high-pressure area is located at a place where the wearer does not have to be fastened, and it is possible to suppress a decrease in wearing comfort of the paper diaper.

In this pant-type disposable paper diaper, when the belt portion is viewed from at least one of the non-skin side and the skin side, the outline portion of the high-pressure area in the up-down direction is Different colors for low pressure areas.

According to such pants-type disposable paper diapers, the boundary between the high-pressure area and the low-pressure area becomes clear, and the user can more easily grasp the position of the high-pressure area.

In this pant-type disposable paper diaper, when the belt portion is viewed from at least one of the non-skin side and the skin side, in the high pressure area and the low pressure area, if When the difference between the a* values of the L*a*b color system is Δb*, and the difference ΔE* is calculated by the following formula, ΔE*={(Δa*)2+(Δb*)2}1/2 the aforementioned color difference ΔE ＊It is 1.45 or more.

According to such shorts-type disposable paper diapers, the user can recognize the high-pressure area and the low-pressure area.

In this pant-type disposable paper diaper, when the belt portion is viewed from the non-skin side, The aforementioned color difference ΔE* is 1.45 or more.

According to such shorts-type disposable paper diapers, since the high-pressure area can be recognized from the non-skin side (outside), the user can easily recognize the high-pressure area and can easily locate the high-pressure area to the wearer. Tighten the part.

In this pant-type disposable disposable diaper, the high-pressure region has a stretchable member that stretches in the left-right direction, and the stretchable member is colored in a different color from the low-pressure region.

According to such shorts-type disposable paper diapers, since the high-pressure area recognized by the user coincides with the area where the tightening pressure is strong, it becomes easy to obtain the effect by the high-pressure area.

In this pant-type disposable paper diaper, in the high-pressure region, a plurality of materials are stacked in the thickness direction of the belt portion, and the stretchable member is disposed close to the non-skin side.

According to such a shorts-type disposable paper diaper, since it becomes easy to recognize the high-pressure area from the non-skin side (outside), the user can easily recognize the high-pressure area, and the high-pressure area can be easily positioned for wearing Those who want to fasten the part.

In this pant-type disposable diaper, the stretchable member is a sheet-like stretchable member.

According to such shorts-type disposable paper diapers, since the colored stretchable member is planar, in the high-pressure area, the area of the color different from the low-pressure area becomes larger, making it easier to recognize the high pressure area.

In the pants-type disposable disposable diaper, in the high-pressure region, the plurality of elastic members are plural, and are arranged at intervals in the vertical direction.

According to such a shorts-type disposable paper diaper, the high-pressure area becomes a striped pattern, the striped pattern becomes emphasized and becomes conspicuous, and the user can easily recognize the high-pressure area.

In this pant-type disposable disposable diaper, the stretchable member is intermittently joined to the sheet disposed closer to the non-skin side than the stretchable member by a plurality of joints, compared to the upper and lower sides The length of the stretchable member in the direction is smaller than the distance between the joining parts adjacent in the up-down direction, and the distance between the joining parts adjacent in the left-right direction is shorter than the length of the stretchable member in the left-right direction Smaller.

According to such pants-type disposable paper diapers, fine wrinkles (concavo-convex) are formed on the stretchable member, so that the stretchable member can be recognized while giving the user the impression of a soft paper diaper.

In this pant-type disposable disposable diaper, the high-pressure area has a different-color portion having a color different from the low-pressure area and a non-different color portion other than the different-color portion, and the belt portion in the left-right direction The central portion has a higher proportion of the aforementioned different-colored portion per unit area than the end portion.

According to such a shorts-type disposable diaper, a high-pressure area is conspicuous in the left-right center portion of the belt portion that is easily noticed by the user, so that the user can easily recognize the high-pressure area.

In this pant-type disposable disposable diaper, the belt portion has a front belt portion and a rear belt portion, and the front belt portion extends from the upper end of the high-pressure region located in the central portion in the left-right direction to the aforementioned The length in the up-down direction up to the waist opening is different from the length in the up-down direction from the upper end of the high-pressure region at the central portion of the rear belt section located in the left-right direction to the waist opening.

If the disposable diaper is used in accordance with such shorts type, the diaper can be judged before and after based on the identification of possible high pressure areas.

In this pant-type disposable disposable diaper, the belt portion has a front belt portion and a rear belt portion, both side portions of the front belt portion in the left-right direction and the left and right directions of the rear belt portion Both side portions are locked by a pair of locking portions, the high-pressure area has a first high-pressure area at the front belt portion, and the first high-pressure area is continuously arranged between the pair of locking portions In the left-right direction, the center portion in the left-right direction of the first high-pressure region is located below the both end portions.

According to such a shorts-type disposable paper diaper, the first high-pressure area can prevent the wearer's abdomen from being excessively tightened. In addition, at both ends of the first high-pressure region in the left-right direction, the anterior superior spine of the wearer can be fastened, and the positional displacement of the paper diaper during wear can be suppressed.

In this pant-type disposable disposable diaper, the high-pressure area is attached to the front belt portion and has a second high-pressure area, and the second high-pressure area is continuously arranged across the pair of locking portions In the left-right direction, both ends of the second high-pressure region in the left-right direction are located below the first high-pressure region, and at least a part of the central portion in the left-right direction of the second high-pressure region is The aforementioned first high pressure regions overlap.

According to such a shorts-type disposable paper diaper, the second high-pressure area can prevent the wearer's abdomen from being excessively tightened. In addition, at both end portions in the left-right direction of the second high-pressure region, the wearer's skeletal anterior superior spine can be fastened to be supported from below, and the positional displacement of the paper diaper during wear can be suppressed.

In this pant-type disposable disposable diaper, the belt portion has a front belt portion and a rear belt portion, both side portions of the front belt portion in the left-right direction and the left and right directions of the rear belt portion Both side portions are locked by a pair of locking portions, the high-pressure area is at the rear belt portion, and has a third high-pressure area, the third high-pressure area is continuous across the pair of locking portions Arranged in the left-right direction, the center portion in the left-right direction of the third high-pressure region is located above the both end portions.

According to such a shorts-type disposable paper diaper, the third high pressure area can prevent the wearer's buttocks from being excessively tightened.

In this pant-type disposable disposable diaper, the high-pressure area is attached to the rear belt portion, and has a fourth high-pressure area, and the fourth high-pressure area is continuously arranged between the pair of locking portions In the left-right direction, both ends of the fourth high-pressure region in the left-right direction are located above the third high-pressure region, and at least a part of the central portion in the left-right direction of the fourth high-pressure region is The third high pressure area overlaps.

According to such a shorts-type disposable paper diaper, the fourth high pressure area can prevent the wearer's buttocks from being excessively tightened. In addition, at both end portions in the left-right direction of the fourth high-pressure area, the wearer's anterior superior spine can be fastened, and positional displacement of the paper diaper during wear can be suppressed.

===First embodiment form=== ===Basic structure of paper diaper 1 === Fig. 1 is a schematic perspective view of a disposable diaper 1 (hereinafter, also referred to as a paper diaper 1) for shorts. Fig. 2 is a schematic plan view of the paper diaper 1 in an unfolded and extended state. In addition, the stretched state of the paper diaper 1 refers to a state in which the paper diaper 1 is stretched to be wrinkle-free, and the dimensions of each member constituting the paper diaper 1 (for example, a sheet constituting the exterior body 20, etc.) are stretched until it is single with the member The size of the same size or the length close to the size. FIG. 3 is a schematic cross-sectional view taken along line I-I (the center in the left-right direction) of FIG. 2.

The paper diaper 1 has an up-down direction, a left-right direction, and a front-rear direction crossing each other, and as shown in FIG. 3, has a thickness direction in which each member is laminated. In the up-down direction, the side that becomes the waist side of the wearer is set to the upper side, and the side that becomes the wearer's crotch side is set to the lower side. In the front-back direction, the side to be the abdomen side of the wearer is set to the front side, and the side to be the back side of the wearer is set to the rear side. In the thickness direction, the side abutting on the wearer is called the skin side, and the opposite side is called the non-skin side.

The paper diaper 1 has an absorbent body 10; and an outer body 20 on the non-skin side of the absorbent body 10. The exterior body 20 has: an abdomen-side exterior body 21 (corresponding to the front belt portion) located on the front side in the front-rear direction; a back-side exterior body 22 (corresponding to the rear belt portion) located on the rear side in the front-rear direction; And the crotch outer body 23 connecting these members.

In addition, in the paper diaper 1 of this embodiment, the exterior body 20 is composed of three members (abdomen-side exterior body 21, back-side exterior body 22, and crotch exterior body 23), but it is not limited thereto. For example, the abdomen-side exterior body 21, the back-side exterior body 22, and the crotch exterior body 23 may be constituted by one member. In addition, it may be a structure without the crotch outer body 23.

In the unfolded paper diaper 1 shown in FIG. 2, the belly-side outer body 21 is located at one end of the absorbent body 10 in the longitudinal direction, and the back-side outer body 22 is located at the other end of the absorbent body 10 in the longitudinal direction . In the unfolded paper diaper 1, the absorbent body 10 is folded in half in the center CL in the longitudinal direction, and the left and right ends of the abdomen-side outer body 21 and the left and right ends of the back-side outer body 22 are It is joined by welding or the like, thereby forming a shorts type as shown in FIG. 1. That is, the longitudinal direction of the absorbent body 10 is along the up-and-down direction of the paper diaper 1, the abdominal-side exterior body 21 and the back-side exterior body 22 are connected in a ring shape, and a waist opening 1a is formed at the upper end thereof, A pair of foot openings 1b are formed on both sides in the direction. Hereinafter, the regions at both ends in the left-right direction where the abdominal-side exterior body 21 and the back-side exterior body 22 are joined are referred to as end joining regions 24.

As shown in FIG. 3, the absorbent body 10 includes: an absorbent core 11; a liquid-permeable top sheet 12 on the skin side of the absorbent core 11; and a back surface on the non-skin side of the absorbent core 11 Flake 13. The back sheet 13 of this embodiment has a two-layer structure of a liquid-impermeable sheet 13a and a liquid-permeable sheet 13b disposed on the non-skin side.

The absorbent core 11 is a member that absorbs and holds excretory fluid such as urine, and is formed of, for example, liquid-absorbent fibers such as pulp fibers mixed with a superabsorbent polymer (SAP). Although not shown, the absorbent core 11 may be coated with a liquid-permeable sheet such as tissue paper or non-woven fabric on its outer peripheral surface.

The abdomen-side outer body 21 and the back-side outer body 22 are respectively shown in FIG. 2 and have waist regions 211 and 221 with an end joining region 24 in the vertical direction; and a lower side than the waist regions 211 and 221 The crotch side regions 212, 222.

The crotch side regions 212 and 222 are formed in a slightly trapezoidal shape, and the lateral width (length in the left-right direction) becomes narrower toward the lower side. The crotch-side region 222 of the back-side outer body 22 is larger than the abdomen-side outer body 21 and can cover the wearer's buttocks.

The abdomen-side exterior body 21 and the back-side exterior body 22 are as shown in FIG. 3, respectively: skin-side sheets 213, 223; non-skin-side sheets 214, 224; and between these sheets, at least in a paper diaper 1 stretchable nonwoven fabrics 215, 225 (equivalent to stretchable members) that are stretchable in the left-right direction.

The skin-side sheets 213, 223, the non-skin-side sheets 214, 224, and the stretchable nonwoven fabrics 215, 225 are joined by a plurality of fusion-spreading portions (for example, symbol 40 in FIG. 6B described later) that are dispersed. Therefore, the skin feels softer than when it is joined by a curing adhesive, for example. In addition, between the welded portions, the stretchable nonwoven fabrics 215 and 225 contract, so that the skin-side sheets 213 and 223 and the non-skin-side sheets 214 and 224 bend and protrude outward in the thickness direction. That is, the skin-side sheets 213 and 223 and the non-skin-side sheets 214 and 224 swell between the welded parts, so that the skin feels softer and the user can be given a soft impression visually. Since the welded portions are dispersed at narrow intervals, the paper diaper 1 of the present embodiment can produce slim protrusions (wrinkles) extending in multiple directions, which can prevent wrinkles in one direction (longitudinal wrinkles) unique to the paper diaper. ), the paper diaper 1 has a good appearance.

The stretchable nonwoven fabrics 215 and 225 are, for example, polypropylene (PP) having a polyurethane elastomer having a thermoplastic elastomer fiber having elasticity, and a polyolefin resin having a thermoplastic resin fiber having inelasticity , Non-woven fabric with proper extension processing such as gear extension. By this stretching process, the stretchable nonwoven fabrics 215 and 225 are made stretchable in the left-right direction and the up-down direction of the paper diaper 1. In addition, the stretching process may be performed in a direction orthogonal to each other, or may be performed only in a predetermined direction. When the stretching process is performed only in the predetermined direction, although the stretchability in the predetermined direction will occur, the orientation of all the fibers does not necessarily follow the predetermined direction, so the stretchability will also occur in the direction orthogonal to the predetermined direction.

In addition, in a region along the edge of the waist opening 1a, a plurality of waist elastic members 26 (for example, rubber threads) are arranged. In a region along the edge of the foot opening 1b, a plurality of foot elastic members 27 (for example, rubber threads) are also arranged. Thereby, the waist part and the foot part of the paper diaper 1 can be firmly adhered to the wearer.

The crotch outer body 23 has the same structure as the abdomen-side outer body 21 and the back-side outer body 22, and includes a skin-side sheet 231, a non-skin-side sheet 232 on the non-skin side, and a stretchable nonwoven fabric between these 233.

＜＜About high pressure area 30s＞＞ 4A to 4C are conceptual diagrams showing a state where the paper diaper 1 is worn. 4A is a diagram viewed from the front side, FIG. 4B is a diagram viewed from the rear side, and FIG. 4C is a diagram viewed from the lateral direction. In the figure, the first high-pressure area 31s and the second high-pressure area 32s are shown by a chain line. 5A to 5B are schematic cross-sectional views of the abdomen-side exterior body 21 and the back-side exterior body 22. 5A is a cross-sectional view of the present embodiment, and FIG. 5B is a cross-sectional view of a modified example. FIG. 6A is an explanatory diagram of the high-pressure region 30s, and FIG. 6B is an explanatory diagram of the vent portion 34 and the welding portion 40.

The waist regions 211 and 221 of the abdomen-side exterior body 21 and the back-side exterior body 22 have an expansion and contraction region 26s along the edge of the waist opening 1a. The stretchable region 26s is a region where a linear waist elastic member 26 that stretches in the left-right direction is provided. In addition, the waist regions 211 and 221 are below the expansion and contraction region 26s, and have a high pressure region 30s and a low pressure region 33s which is an area other than this region.

The low-pressure region 33s is a region where stretchable nonwoven fabrics 215 and 225 are provided between the skin-side sheets 213 and 223 and the non-skin-side sheets 214 and 224. As shown in FIG. 2, the low-pressure region 33 s has a base region 21 s having a telescopic region 26 s adjacent to the center of the abdominal exterior body 21 in the left-right direction from the lower side.

The high-pressure region 30s is a region where the stretchable nonwoven fabric 215, 225 and the stretchable film 30 are provided between the skin-side sheets 213, 223 and the non-skin-side sheets 214, 224, and covers the abdominal-side exterior body 21 and the back-side exterior The body 22 is arranged in a circle. The stretchable film 30 is a stretchable elastic member made of, for example, an elastic resin such as urethane, styrene, etc., which is melted to have a uniform thickness. Also, for example, a stretchable film in which a polyolefin layer is integrated on the front and back surfaces of the elastomer layer. When using this stretchable film, since the polyolefin layer does not have stretchability, stretchability can be produced by stretching the film in advance. By having a polyolefin layer on the surface, there is an advantage that fusion welding with polyolefin fiber nonwoven fabric becomes easy.

The high-pressure region 30s is a region where the pressure (tightening pressure) when the paper diaper 1 is worn is higher than the low-pressure region 33s. In other words, the force to extend the high-pressure region 30s per unit width (per unit length in the up-and-down direction) to the left-right direction is compared to the low-pressure region 33s (base region 21s) at the unit width (per unit length in the vertical direction) The force to extend the unit length in the left and right direction is greater.

That is, the contraction force acting in the left-right direction per unit length of the high pressure region 30s in the up-down direction is greater than the contraction force acting in the left-right direction per unit length in the vertical direction of the low pressure region 33s. The high-pressure region 30s with greater contraction force is strongly in close contact with the wearer.

Furthermore, the magnitude of the force that extends the unit-width high-pressure region 30s and the base region 21s (low-pressure region 33s) in the left-right direction by unit length can be measured and compared by a conventional method. For example, samples of a predetermined size are cut out from the high-pressure area 30s and the base area 21s, respectively. Then, the both ends of the sample corresponding to the left-right direction of the paper diaper 1 are pinched by the jig of the testing machine. Then, the load (N) obtained in a state where the unit length is separated between the jigs and the sample is extended is used as the force for extending the unit length in the left-right direction.

In this way, in the paper diaper 1 of the present embodiment, the abdominal-side outer body 21 and the back-side outer body 22 are partially provided, and the high-pressure region 30s is continuously provided in the circumferential direction to partially raise the abdominal-side outer body 21 And the tightness of the outer body 22 on the back side. Therefore, compared with the case where the adhesiveness of the entire abdomen-side exterior body 21 and the back-side exterior body 22 is improved, an excessive sense of pressure is not applied to the wearer, and the positional deviation when the diaper 1 is worn can be suppressed . In addition, even in the low-pressure region 33s other than the high-pressure region 30s, the stretchable nonwoven fabrics 215 and 225 can maintain the wearer's body with appropriate adhesion.

In the high-pressure region 30 s, a sheet-like stretchable film 30 is superposed on the stretchable nonwoven fabrics 215 and 225. Therefore, the high-pressure region 30s can be in close contact with the wearer, and the pressure of the high-pressure region 30s can be equally applied to the wearer's skin. Therefore, it is possible to prevent local tightening in the case where a linear elastic member is provided instead of the stretchable film 30, and it is possible to suppress traces of the stretchable member from remaining.

In addition, the stretchable film 30 can obtain higher shrinkage force (tightening pressure) even if the thickness is thinner than the stretchable nonwoven fabric. Therefore, in the high-pressure region 30s, the stretchable film 30 is superposed on the stretchable nonwoven fabrics 215, 225, but the thickness of the high-pressure region 30s can be made thinner, which can suppress the decrease in skin feel and heat dissipation.

In addition, the high-pressure region 30 s is at least one of the abdomen-side exterior body 21 and the back-side exterior body 22 and does not overlap the absorbent core 11 in the front-rear direction (thickness direction). In the paper diaper 1 of this embodiment, as shown in FIG. 2, neither the high-pressure region 30 s on the abdomen side nor the back side overlaps the absorbent core 11. Therefore, by the thick and highly rigid absorbent core 11, it is possible to prevent the tightening pressure of the high-pressure region 30 s from being hindered.

In addition, on the abdomen-side exterior body 21 and the back-side exterior body 22, skin-side sheets 213, 223 located closest to the skin side, and non-skin-side sheets 214, 224 located closest to the non-skin side are used as, for example, spunbond Non-woven fabrics such as non-woven fabrics and SMS non-woven fabrics. In addition, the stretchable members that stretch the waist regions 211 and 221 in the left-right direction are stretchable nonwoven fabrics 215 and 225. These nonwoven fabrics have gaps between the constituent fibers, and therefore have air permeability in the thickness direction.

In addition, the stretchable film 30 disposed in the high-pressure region 30 s has poor air permeability compared to the non-woven fabric. Therefore, if only the stretchable film 30 is provided in the high-pressure region 30s, the air permeability of the high-pressure region 30s will be reduced. As a result, the inside of the paper diaper 1 is stuffy, and the wearing comfort is poor, resulting in rough skin with sweat rash.

Therefore, the high-pressure region 30s serves as a ventilation part 34 having a portion where the stretchable film 30 exists and has better ventilation. In the high-pressure region 30s of the present embodiment, a plurality of stretchable films 30 long in the left-right direction are arranged at intervals in the up-down direction, and are arranged between the stretchable films 30 in the up-down direction (that is, stretch The portion where the sexual film 30 does not exist) becomes the vent 34.

Specifically, the high-pressure region 30s has a first high-pressure region 31s and a second high-pressure region 32s. In each of the first high-pressure region 31s and the second high-pressure region 32s, three stretchable films 30 are arranged at intervals in the vertical direction. The three stretchable films 30 on the side of the abdomen-side exterior body 21 and the three stretchable films 30 on the side of the corresponding back-side outer body 22 are respectively arranged at the end joining area 24, in the up-down direction The location becomes the same. That is, in the end joining area 24, three stretchable films 30 on the abdomen-side exterior body 21 side are connected to three stretchable films 30 on the back-side exterior body 22 side to form a continuous, high-pressure area 30s It is provided in a circumferential shape over the abdomen-side exterior body 21 and the back-side exterior body 22.

In this way, since the high-pressure region 30 s has the ventilation portion 34 (thickness direction ventilation), the humid air inside the paper diaper 1 can be released from the high-pressure region 30 s, and the sultry inside the paper diaper 1 can be reduced. Therefore, the wearing comfort of the paper diaper 1 is improved, and the generation of sweat rash and the like can be suppressed.

In addition, in the end joining region 24, the high-pressure region 30s on the abdomen side and the high-pressure region 30s on the back side are not limited to be completely continuous, and at least a part may be continuous in the circumferential direction of the waist circumference. For example, the high-pressure region 30 s on the back side may be arranged above the high-pressure region 30 s on the abdomen side, and a step may be provided at the end joining region 24 to be partially connected.

The stretchable film 30 is located between the skin-side sheets 213 and 223 and the non-skin-side sheets 214 and 224. Since the stretchable film 30 is not exposed to the non-skin side, it is possible to suppress breakage and peeling of the stretchable film 30 due to movement during wearing, friction with clothing, and the like. In addition, if the stretchable film 30 is exposed to the skin side, the stretchable film 30 is likely to be in close contact with the wearer's skin, resulting in reduced air permeability in the plane direction of the high-pressure region 30s. On the other hand, as shown in FIG. 5A, the non-woven fabrics such as skin-side sheets 213 and 223 are bent outward in the thickness direction by the shrinkage of the stretchable film 30 to protrude. Therefore, by arranging the skin-side sheets 213, 223 (nonwoven fabric) on the skin side of the stretchable film 30, a space S (ventilation path) is formed between the skin-side sheets 213, 223 and the wearer's skin. Therefore, the air permeability in the planar direction of the abdomen-side exterior body 21 and the back-side exterior body 22 can be ensured, and the heat inside the paper diaper 1 can be further reduced.

In addition, the area other than the high-pressure area 30s also has air permeability in the thickness direction. Specifically, the stretchable area 26s is an area between the skin-side sheets 213, 223 and the non-skin-side sheets 214, 224 having air permeability, and the waist elastic member 26 is provided at intervals in the vertical direction. Therefore, the expansion and contraction area 26S has air permeability.

In addition, the low-pressure region 33s (base region 21s) is a region where the breathable elastic nonwoven fabrics 215 and 225 are provided between the skin-side sheets 213 and 223 and the non-skin-side sheets 214 and 224. Therefore, the low-pressure region 33s also has ventilation.

In this way, the waist regions 211 and 221 of the abdomen-side exterior body 21 and the back-side exterior body 22 are breathable throughout the entire region. Therefore, the heat inside the paper diaper 1 can be further reduced.

Further, as shown in FIG. 6A, a length L1 at the center C in the left-right direction of the abdominal-side outer body 21 from the upper end 30a of the high-pressure region 30s to the upper-lower direction of the upper end 21a of the abdominal-side outer body 21 is a high pressure The length L2 in the vertical direction of the region 30s is preferably long (L1>L2).

As a result, in the center C in the left-right direction of the abdomen-side exterior body 21, the high-pressure region 30s is located lower. Therefore, the high-pressure region 30s is not easily abutted around the belly button of the wearer who is prone to sweat, and the sultry inside the paper diaper 1 can be reduced. In addition, since the high-pressure region 30s does not abut around the wearer's navel, the wearer can easily breathe.

In addition, the stretchable members arranged in the high-pressure region 30s and the low-pressure region 33s are breathable sheet-like members. The air-permeable sheet-like member refers to stretchable nonwoven fabrics 215, 225, stretchable film with openings, and the like.

In this way, the air permeability of the high-pressure region 30s and the low-pressure region 33s can be ensured, and the high-pressure region 30s and the low-pressure region 33s can be in close contact with the wearer. Therefore, local tightening can be prevented, and traces of the stretchable member can be suppressed from remaining. In addition, since the high-pressure region 30s and the low-pressure region 33s are in close contact with the wearer, the area of contact with the skin, that is, the frictional resistance increases. Therefore, the positional displacement of the paper diaper 1 during wearing can be further suppressed.

However, it is not limited to the foregoing structure, and the stretchable member may be a plurality of linear elastic members provided at intervals in the vertical direction. Moreover, in this embodiment, as shown in FIG. 3, the stretchable nonwoven fabrics 215 and 225 are not arranged in the stretchable area 26s. However, a sheet member having air permeability may be arranged in the stretchable area 26s.

As shown in FIG. 3, the stretchable nonwoven fabrics 215 and 225 are preferably arranged between the skin-side sheets 213 and 223 and the non-skin-side sheets 214 and 224 and are closer to the skin than the stretchable film 30.

As a result, as shown in FIG. 5A, by shrinking the stretchable film 30, the two pieces of nonwoven fabric (stretchable nonwoven fabrics 215 and 225 and skin-side sheets 213 and 223) bend toward the skin and protrude. Therefore, by forming a larger space S (ventilation path) between the skin-side sheets 213 and 223 and the wearer's skin. Therefore, the air permeability of the abdomen-side exterior body 21 and the back-side exterior body 22 in the planar direction can be improved.

In addition, the high-pressure region 30s of this embodiment has a vent 34 between the stretchable films 30 arranged in the vertical direction. In this case, it is preferable that the stretchable film 30 does not have openings penetrating the stretchable film 30.

With this, it is possible to suppress a decrease in the strength of the stretchable film 30 due to the opening. In addition, the tightening pressure of the stretchable film 30 is not reduced by the opening, and the stretchable film 30 can be effectively used. However, not limited to this, the stretchable film 30 may have openings.

Further, in the high-pressure region 30s, it is preferable that the area of the portion where the stretchable film 30 exists is larger than the area of the vent 34 arranged between the stretchable films 30 in the vertical direction. Thereby, it is possible to suppress the decrease in the air permeability of the high-pressure region 30 s, and to increase the tightening pressure of the high-pressure region 30 s, and it is possible to suppress the positional deviation of the paper diaper 1 during wearing.

In the present embodiment, the lengths of the stretchable film 30 and the vent 34 in the vertical direction are the same. In addition, the first high-pressure region 31s and the second high-pressure region 32s have three stretchable membranes 30 and two vents 34, respectively. Therefore, the area of the portion where the stretchable film 30 exists is larger than the area of the vent 34.

In addition, the comparison of the area is carried out by a conventional method in the natural state of the paper diaper 1 or the state in which the paper diaper 1 is stretched. For example, by visual comparison, or by using area calculation software, the area of each part is calculated from the image obtained by imaging the high-pressure region 30s, and then compared.

The four sheets of skin-side sheets 213, 223, non-skin-side sheets 214, 224, stretchable nonwoven fabrics 215, 225, and stretchable film 30 are welded in the thickness direction (front-rear direction) and joined by the same welding pattern Better. That is, it is preferable that the four sheets are welded simultaneously. Examples of welding methods include conventional methods such as thermal welding, ultrasonic welding, and laser irradiation welding.

The welding pattern refers to a pattern in which a plurality of welding parts 40 are dispersed. In this embodiment, as shown in FIG. 6B and FIG. 7C to be described later, etc., the rectangular welding portion 40 inclined at 45 degrees or -45 degrees in the left-right direction is arranged at intervals in the left-right direction and the up-down direction. However, the welding pattern shown in FIG. 6B is an example, and the shape, size, number, arrangement, and the like of the welding portion 40 are not limited to those shown.

In the welded portion 40, the sheet is thinned and air permeability is reduced. Therefore, if sheets adjacent in the thickness direction are individually welded, and the welded portion 40 of each layer is offset in the plane direction, as shown by the arrows in FIG. 5B, the moist air inside the paper diaper 1 cannot be smoothly smoothed Release. Therefore, by welding four sheets at the same time, as shown by the arrows in FIG. 5A, the humid air inside the paper diaper 1 can be effectively released in the thickness direction, so that the abdomen-side outer body 21 and the back side can be made The air permeability of the body 22 in the thickness direction is improved.

Also, the adjacent sheets in the thickness direction are joined by an adhesive. However, the cured adhesive will also reduce the permeability. By joining the adhesives of the adjacent sheets in the thickness direction with the same coating pattern and overlapping positions, the humid air inside the paper diaper 1 can be effectively released, but it is not easy to apply the adhesive The pattern is consistent. Therefore, as described above, it is preferable to weld and join four sheets at the same time.

In addition, in the state where the paper diaper 1 has been extended, it is preferable that the area of the vent portion 34 in the high-pressure region 30 s is larger than the area of the welded portion 40 in the high-pressure region 30 s. Specifically, as shown in FIG. 6B, the area of each vent portion 34 arranged between the stretchable films 30 in the vertical direction is preferably larger than the area of each welded portion 40.

Thereby, the welded part 40 with reduced air permeability can be prevented from covering the air vent 34. Therefore, it is possible to maintain the air permeability in the high-pressure region for 30s. In addition, the comparison of the area of each part is a conventional method such as the visual method and the method of calculating the software using the area as described above.

In addition, the first high-pressure region 31s is located at the end joining region 24, is separated from the second high-pressure region 32s, and is arranged above the second high-pressure region 32s. In addition, the first high-pressure region 31s is arranged such that at least the upper end is located above the anterior superior spine of the wearer, and the second high-pressure region 32s is arranged so that at least the lower end is located below the anterior superior spine of the iliac bone. In the present embodiment, the lower end of the first high-pressure region 31s is placed above the anterior superior spine of the iliac bone. In addition, the anterior superior spine of the iliac bone is the protruding part of the largest bone of the pelvis, that is, the protruding part of the intestinal bone, which touches the finger when the hand is pressed against the waist. Thereby, when the paper diaper 1 is worn, the anterior supraspinal spine of the wearer can be held by the first high-pressure region 31s and the second high-pressure region 32s. Therefore, the positional deviation of the paper diaper 1 during wearing can be suppressed.

In addition, the first high-pressure region 31s is curved on the abdomen side and convexly downward, and is arranged substantially horizontally on the back side near the lower side of the expansion and contraction region 26s. In addition, the second high-pressure region 32s is arranged on the abdomen side and is arranged substantially horizontally, and on the back side, it is convexly curved upward. Therefore, as shown in FIGS. 4A to 4C, at the center C in the left-right direction of the paper diaper 1, the lower end of the first high-pressure region 31 s on the back side is arranged above the lower end of the first high-pressure region 31 s on the abdomen side . Similarly, in the center C in the left-right direction of the paper diaper 1, the lower end of the second high-pressure region 32s on the back side is disposed above the lower end of the second high-pressure region 32s on the abdomen side. By this, the lower abdomen can be tightened diagonally upward, and the intra-abdominal pressure can be increased. Therefore, the effect of assisting the muscles (abdominal muscles, etc.) around the bone plate can stabilize the bone plate.

In addition, as described above, the first high-pressure region 31s and the second high-pressure region 32s are in the up-down direction on the lateral portion A2 (see FIG. 2) of the abdominal-side exterior body 21 and the back-side exterior body 22 (see FIG. 2 ). Separate. In addition, in the central portion A1 of the abdomen-side exterior body 21 and the back-side exterior body 22 in the left-right direction, a portion of the first high-pressure region 31s and the second high-pressure region 32s overlap.

Therefore, the lateral portion A2 of the abdomen-side outer body 21 and the back-side outer body 22 in the left-right direction has a higher ratio of the vent 43 in the high-pressure region 30s than the center portion A1 in the left-right direction. That is, the value of the area of the vent 43 divided by the area of the high-pressure region 30s (the combined area of the first high-pressure region 31s and the second high-pressure region 32s) becomes larger.

In this way, by increasing the ratio of the ventilation portion 43 in the lateral portion A2 where the wearer's movements (the movements of the buttocks, feet, etc.) are large, the abdominal-side exterior body 21 and the back-side exterior body can be made The ventilation of 22 is improved, and it can suppress the tightening of the high pressure area for 30s, which can prevent the wearer's movement from being hindered. In addition, in the central portion A1 in the left-right direction where the wearer's movement is small, the central portion A1 in the left-right direction is firmly adhered to the wearer by reducing the ratio of the vent 43, so that the paper diaper 1 can be effectively suppressed Position shift when wearing.

In addition, the central portion A1 of the abdominal exterior body 21 and the back exterior body 22 in the left-right direction is the central portion when the abdominal exterior body 21 and the back exterior body 22 are divided into three in the left-right direction The two outer sides are referred to as the lateral part A2 in the left-right direction. In addition, the comparison of the area of each part is a conventional method such as the visual method and the method of calculating the software using the area as described above.

In addition, the shape of the high-pressure region 30s is not limited to the shape shown in FIG. 2. For example, the number of high-pressure regions 30s is not limited to two, but may be one or more than three. In addition, for example, the high-pressure region 30s may be formed horizontally in the left-right direction on the abdomen side and the back side.

＜＜Modification of 30s in high pressure area＞＞ 7A to 7C are explanatory views of the high-pressure region 30s in a modification example. FIG. 7A shows the stretchable film 30 in a natural state, and FIG. 7B shows the stretchable film 30 in a state where it has been stretched in the left-right direction. FIG. 7C shows the size of the welded part 40.

Although not shown, in the high-pressure region 30s of the modification, the stretchable film 30 is arranged in the entire region of the high-pressure region 30s. That is, the high-pressure region 30s of the modified example does not have the ventilation portion 34 between the stretchable membranes 30 arranged at intervals in the vertical direction (see FIG. 6A). Therefore, the tightening pressure of the high-pressure region 30s becomes slightly equal, and the tightening of the high-pressure region 30s can be stabilized.

In addition, the stretchable film 30 has an opening 50 penetrating the stretchable film 30, and the opening 50 is used as a vent for the high-pressure region 30s. Thereby, the humid air inside the paper diaper 1 can be released from the opening 50, and the decrease in the air permeability in the thickness direction of the high-pressure region 30s can be suppressed.

As a method of forming the opening 50, for example, as shown in FIG. 7A, in the natural state of the stretchable film 30, a plurality of slits extending in the vertical direction are formed at intervals in the vertical and horizontal directions at intervals method. In this case, as shown in FIG. 7B, in a state where the stretchable film 30 is stretched in the left-right direction, that is, in the wearing state, the opening 50 is expanded in the left-right direction (for example, about 2 to 4 times the expansion). Humid air is released from the opening 50. However, the pattern of the opening 50 shown in FIGS. 7A and 7B is an example, and the shape, size, number, arrangement, and the like of the opening 50 are not limited to those shown.

As in the previous embodiment, in the state where the paper diaper 1 has been extended, the area of the opening 50 (ventilation portion) is preferably larger than the area of the welded portion 40 located in the high pressure region 30 s. In the present embodiment, in the state where the paper diaper 1 has been extended, the length of the opening 50 in the left-right direction is set to about 2 to 4 mm, and the length in the vertical direction is set to about 1 mm. In addition, the welded portion 40 has a rectangular shape with a long side of about 0.5 mm and a short side of about 0.3 mm.

In this way, by making the area of each opening 50 larger than the area of each welding portion 40, it is possible to prevent the opening 50 from being covered by the welding portion 40. Therefore, it is possible to maintain the air permeability in the high-pressure region for 30s. In addition, the comparison of the area of each part is a conventional method such as the visual method and the method of calculating the software using the area as described above.

===Second embodiment form=== In the following, as a pants-type disposable diaper, the second embodiment will be described by taking an pants-type disposable diaper for adults as an example. However, the invention is not limited to this, and the short-sleeved disposable diaper of the present invention can also be applied as, for example, a disposable disposable diaper for children (for infants), physiological pants, and the like.

<<Basic structure of paper diaper 300>> FIG. 8 is a schematic perspective view of a disposable diaper 300 (hereinafter, also referred to as a paper diaper 300) for shorts. 9 is a schematic plan view of the paper diaper 300 in an unfolded and extended state. 10 is a schematic cross-sectional view taken along line I-I (the center in the left-right direction) of FIG. 9. FIG. 11A is a diagram showing an example of the joint 350 of the front belt portion 321 and the rear belt portion 322, and FIG. 11B is a schematic cross-sectional view of the front belt portion 321 and the rear belt portion 322. FIG.

The paper diaper 300 has an up-down direction, a left-right direction, and a front-back direction crossing each other, and as shown in FIG. 10, has a thickness direction in which each member is stacked. In the up-down direction, the side that becomes the waist side of the wearer is set to the upper side, and the side that becomes the wearer's crotch side is set to the lower side. In the front-back direction, the side to be the abdomen side of the wearer is set to the front side, and the side to be the back side of the wearer is set to the rear side. In the thickness direction, the side abutting on the wearer is called the skin side, and the opposite side is called the non-skin side.

The paper diaper 300 has an absorbent body 310; and an outer body 320 on the non-skin side of the absorbent body 310. The exterior body 320 has a belt portion 321 disposed on the front side of the wearer's abdomen side; a belt portion 322 disposed on the back side of the wearer's back side; and a crotch portion 323 connecting these.

In addition, in the paper diaper 300 of the present embodiment, the exterior body 320 is composed of three members (the front belt portion 321, the rear belt portion 322, and the crotch portion 323), but it is not limited thereto. For example, the front belt part 321, the rear belt part 322, and the crotch member 323 may be one continuous member. In addition, it may have a structure without the crotch portion 323.

In the unfolded paper diaper 300 shown in FIG. 9, the front belt portion 321 is located at one end of the absorbent body 310 in the longitudinal direction, and the rear belt portion 322 is located at the other end of the absorbent body 310 in the longitudinal direction. In the unfolded paper diaper 300, the absorptive body 310 is folded in half at the center in the longitudinal direction, and the left and right sides of the front belt part 321 and the left and right sides of the rear belt part 322 are paired together. The stopper 324 is locked, thereby forming a shorts type as shown in FIG. 8. That is, the longitudinal direction of the absorbent body 310 is along the up-and-down direction of the paper diaper 300, the front belt portion 321 and the rear belt portion 322 are connected in a loop, and a waist opening 300a is formed at the upper end, and both A pair of foot openings 300b are formed on the side. In addition, as the locking method by the locking portion 324, for example, welding, bonding by an adhesive, and the like can be mentioned.

As shown in FIG. 10, the absorbent body 310 includes: an absorbent core 311; a liquid-permeable top sheet 312 on the skin side of the absorbent core 311; and a back surface on the non-skin side of the absorbent core 311片313。 313. The back sheet 313 of this embodiment has a double-layer structure of a liquid-impermeable sheet 313a and a hydrophobic liquid-permeable sheet (for example, hydrophobic nonwoven fabric) 313b disposed on the non-skin side.

The absorbent core 311 is a member that absorbs and holds excretory fluids such as urine, and is formed of, for example, liquid-absorbent fibers such as pulp fibers mixed with a superabsorbent polymer (SAP). Although not shown, the absorbent core 311 may be coated on its outer peripheral surface with a liquid-permeable sheet such as tissue or non-woven fabric.

As shown in FIG. 9, the front belt portion 321 and the rear belt portion 322 respectively have a waist area 3211, 3221 that overlaps with the locking portion 324 in the up-down direction, and a lower side than the waist area 3211, 3221 Crotch side regions 3212, 3222.

The crotch-side regions 3212 and 3222 are formed in a slightly trapezoidal shape, and the lateral width (length in the left-right direction) becomes narrower toward the lower side. In addition, the crotch side area 3222 of the rear belt portion 322 is larger than the front belt portion 321, and can cover the wearer's buttocks.

As shown in FIG. 10, the front belt portion 321 and the rear belt portion 322 include: skin-side sheets 3213, 3223; non-skin-side sheets 3214, 3224; and stretchable nonwoven fabrics 3215, 3225 located between the sheets. Examples of the skin-side sheets 3213 and 3223 and the non-skin-side sheets 3214 and 3224 include flexible sheets made of spunbonded nonwoven fabric, SMS nonwoven fabric, and the like. The skin-side sheets 3213 and 3223 and the non-skin-side sheets 3214 and 3224 are non-stretchable sheets that are not substantially stretchable.

The stretchable nonwoven fabrics 3215 and 3225 are made into sheets that stretch at least in the left-right direction of the paper diaper 300. In addition, the stretchable nonwoven fabrics 3215 and 3225 are nonwoven fabrics including stretchable fibers and non-stretchable fibers (that is, extensible fibers having lower shrinkage than stretchable fibers).

Examples of the stretchable nonwoven fabrics 3215 and 3225 include stretchable fibers of a polyurethane elastomer having a thermoplastic elastomeric fiber having elasticity, and polyolefin having a thermoplastic resin that is inelastic. The non-stretchable polypropylene-based (PP) non-stretchable fiber is a non-woven fabric that is appropriately stretched by gear stretching or the like. The stretching process may be carried out in a direction orthogonal to each other (the left-right direction and the up-down direction of the paper diaper 300), or may be carried out only in a predetermined direction (the left-right direction of the paper diaper 300). Furthermore, in the case of stretching only in a predetermined direction, although the stretchability in the predetermined direction will occur, the orientation of all the fibers may not necessarily be along the predetermined direction, so it will also stretch in the direction orthogonal to the predetermined direction Sex.

The skin-side sheets 3213 and 3223, the non-skin-side sheets 3214 and 3224, and the stretchable nonwoven fabrics 3215 and 3225 are joined by the joining portion 350 in a state where the stretchable nonwoven fabrics 3215 and 3225 are elongated in the left-right direction. As shown in FIG. 11A, the joining portion 350 is preferably dispersed in the left-right direction and the up-down direction of the paper diaper 300. As a result, when the paper diaper 300 shrinks, the skin-side sheets 3213 and 3223 and the non-skin-side sheets 3214 and 3224 are rolled up between the joining portions 350 to form convex portions protruding outward in the thickness direction. In addition, the stretchable nonwoven fabrics 3215 and 3225 are stretched in the thickness direction because the stretchable fibers entangle (collect) the non-stretchable fibers and shrink. Therefore, the convex portions are supported by the fibers of the stretchable nonwoven fabrics 3215 and 3225 and are not easily crushed, and the cushioning properties of the convex portions are improved. Therefore, the front-side belt portion 321 and the rear-side belt portion 322 can improve contact with the wearer's skin. In addition, the user can be given the impression of a soft paper diaper 300 visually.

In addition, the crotch portion 323 has a structure in which a stretchable nonwoven fabric 3233 is arranged between the skin-side sheet 3231 and the non-skin-side sheet 3232, similar to the front belt section 321 and the rear belt section 322. However, the structure of the crotch portion 323 is not particularly limited. For example, a structure in which the stretchable nonwoven fabric 3233 is arranged between the absorbent body 310 and the non-skin side sheet 3232 may not include the skin side sheet 3231.

＜＜About low pressure area 330 and high pressure area 340＞＞ 12 is a schematic plan view of the rear belt portion 322. 13 is a schematic plan view of the front belt portion 321. 14A and 14B are explanatory diagrams of the gluteus medius 360.

The front belt portion 321 and the rear belt portion 322 are waist regions 3211 and 3221 (refer to FIG. 9) that overlap with the locking portion 324 in the vertical direction, and have a low pressure region 330 and a high pressure region 340, respectively.

The low-pressure region 330 is a region where stretchable nonwoven fabrics 3215 and 3225 are arranged between the skin-side sheets 3213 and 3223 and the non-skin-side sheets 3214 and 3224. The high-pressure region 340 is a region where the stretchable nonwoven fabrics 3215 and 3225 and the stretchable film 343 are arranged between the skin-side sheets 3213 and 3223 and the non-skin-side sheets 3214 and 3224. The stretchable film 343 is a sheet that stretches at least in the left-right direction of the paper diaper 300. Therefore, the low-pressure region 330 and the high-pressure region 340 are stretchable in the left-right direction.

As the stretchable film 343, for example, an elastic member having elasticity such as a sheet-like uniform thickness is melted by an elastic resin such as urethane or styrene. In addition, for example, it may be a stretchable film in which a polyolefin layer is integrated on the front and back surfaces of the elastomer layer. In the case of using this stretchable film, since the polyolefin layer does not have stretchability, it has stretchability to stretch the film. By having a polyolefin layer on the surface, there is an advantage that fusion welding with polyolefin fiber nonwoven fabric becomes easy.

The high-pressure region 340 is provided with a stretchable film 343, and the tightening pressure when the paper diaper is worn can be increased compared to the low-pressure region 330. In detail, the force used to extend the high-pressure area 340 of the unit width in the up-and-down direction to the left-right direction is greater than the force used to extend the unit-length low-pressure area 330 of the unit width in the vertical direction to the left-right direction. . That is, the contraction force acting in the left-right direction in the high-pressure region 340 per unit width is greater than the contraction force acting in the left-right direction in the low-pressure region 330 per unit width, and the high-pressure region 340 can be strongly in close contact For wearers.

However, it is not limited to disposing the stretchable film 343 in the entire region of the high-pressure region 340. For example, as shown in FIGS. 12 and 13, a plurality of stretchable films 343A to 343F and 343a to 343f may be arranged at intervals in the vertical direction. In this case, the upper end of the uppermost stretchable member (343A, 343a) and the lowermost stretchable member (343F) of the plurality of stretchable members (here, the stretchable film 343) forming the high-pressure region 340 , 343f) and the area surrounded by the pair of locking portions 324 (the area surrounded by 3a, 3b, 3c, 3d shown in FIG. 12, the area surrounded by 3e, 3f, 3g, 3h shown in FIG. 13) as High pressure area 340.

In addition, at the upper end portions of the front side belt portion 321 and the rear side belt portion 322 of this embodiment, a rubber thread 326 for waist circumference is arranged, and stretchable nonwoven fabrics 3215 and 3225 and stretchable film 343 are not arranged. In addition, stretchable nonwoven fabrics 3215 and 3225 are arranged in the entire area below the waistline rubber thread 326. However, the present invention is not limited to the foregoing configuration, and the stretchable non-woven fabrics 3215 and 3225 may be arranged on the upper end portions of the front belt portion 321 and the rear belt portion 322 so as to overlap with the waist cord 326.

In addition, a region below the higher pressure region 340 of the waist region 3221 of the rear belt portion 322 is referred to as a low pressure region 330. In addition, a region above the higher pressure region 340 of the waist region 3211 of the front belt portion 321 and a region below the waist rubber line 326 are used as the low pressure region 330. In addition, when the rear belt part 322 has the rubber line 327 for foot circumferences, the part where the rubber line 327 for foot circumferences is arranged is removed from the low-pressure region 330. However, in FIGS. 9 and 12, for easy understanding, the portion where the rubber line 327 for foot circumference is arranged is also surrounded by a thick line as the low-pressure region 330.

Furthermore, the comparison of the force for extending the high-pressure area 340 of the unit width in the up-and-down direction to the left-right direction and the force for extending the unit-length of the low-pressure area 330 of the unit width in the vertical direction to the left-right direction is The conventional method is sufficient. For example, from the rear belt portion 322 or the front belt portion 321, all the high-pressure regions 340 and the low-pressure regions 330 are cut out as samples, respectively. Then, the average value of the vertical length of each sample was calculated. Then, the both ends of the sample corresponding to the left-right direction of the paper diaper 300 are pinched by the jig of the testing machine. Measure the load obtained by separating the unit length between the clamps and extending the sample. In addition, the load of each sample may be divided by the average value of the length of each sample in the vertical direction for comparison. In addition, when the low-pressure region 330 of the rear belt portion 322 is cut out in a range including the portion where the rubber line 327 for foot circumference is arranged (the range of the thick line in FIG. 12 ), the rubber line 327 for foot circumference The load is measured without stretchability.

In the following description, the low-pressure region 330 and the high-pressure region 340 of the rear belt portion 322 are referred to as the “rear low-pressure region 331” and the “rear high-pressure region 341”, and the low-pressure region of the front belt portion 321 The area 330 and the high-pressure area 340 are referred to as a "front low-pressure area 332" and a "front high-pressure area 342".

As shown in FIGS. 9 and 12, the rear high-pressure region 341 is continuously arranged in the left-right direction across the pair of locking portions 324. If the end of the rear high-pressure region 341 is located at the edge of the foot circumference opening 300b, the rear high-pressure region 341 contracts to expand the foot circumference opening 300b, and the tightening pressure (adhesion force) of the rear high-pressure region 341 is reduced. In contrast, in the present embodiment, the rear high-pressure region 341 is connected to the front belt portion 321 via the locking portion 324. Therefore, the reduction of the tightening pressure of the rear high-pressure region 341 can be suppressed.

The left and right ends 3411 of the rear high-pressure region 341 are longer in the vertical direction than the central portion 3412 (L31>L32), and the lower end 341a of the rear high-pressure region 341 is longer. Located lower.

That is, as shown in FIG. 14A, the rear high-pressure region 341 is configured to fit the shape of the gluteus medius 360 of the wearer (human body). Therefore, when the paper diaper 300 is worn, the rear high-pressure region 341 can fasten the wearer's gluteus medius 360 and can assist the movement of the gluteus medius 360. As a result, the pelvis can be stabilized during walking or other movements, and the wearer's movements (walking) can be supported.

In addition, the positional relationship between the length (L31, L32) and the lower end (341a) in the up-down direction may be established at least in the center with both ends of the rear high-pressure region 341 in the left-right direction. It is desirable that the central portion 3412 between the both ends 1/3 of the entire length from the both ends in the left-right direction of the rear high-pressure region 341 is formed at the center portion 3412 therebetween.

In addition, when comparing the length, position, etc. of the rear high-pressure region 341, the rear belt portion 322 may be extended to a state without wrinkles. Specifically, the rear side belt portion 322 is extended to a state where the size of the member (for example, skin-side sheet 3223, etc.) constituting the rear side belt portion 322 is equal to or close to the length of the single member of the member. The comparison of other lengths, positions, etc., which will be described later, is the same.

In addition, the rear low-pressure region 331 is arranged at the center of the rear belt portion 322 in the left-right direction so as to be adjacent to the lower side of the rear high-pressure region 341. Specifically, the rear low-pressure region 331 may be located at least in the center of the rear belt portion 322 in the left-right direction, and ideally, the length of 1/3 from the both ends of the rear belt portion 322 in the left-right direction is two The end portion and the rear low-pressure region 331 may be located in the center portion therebetween.

As shown in FIG. 14A, only the gluteus maximus 361 that does not overlap with the gluteus maximus 360 exists in the center of the hip of the wearer (human body). The central part of the buttocks, where only the gluteus maximus 361 is present, expands and contracts greatly when performing actions such as sitting down and walking. Therefore, if the rear high-pressure region 341 is located at the center of the buttocks, friction between the wearer and the paper diaper 300 is likely to occur, and the wearing comfort of the paper diaper 300 is reduced. On the other hand, in this embodiment, the rear low-pressure region 331 is arranged in accordance with the center of the buttocks. Therefore, there is no excessive tightening of the central part of the buttocks where the muscles, skin, and the like are greatly contracted, the friction between the wearer and the paper diaper 300 can be reduced, and the wearing comfort of the paper diaper 300 can be improved. good.

In addition, since the rear low-pressure region 331 has elasticity, it can be properly fitted to the center of the buttocks, and the positional displacement of the paper diaper 300 can be suppressed. As a result, the state in which the rear high-pressure region 341 is close to the gluteus medius muscle can be maintained, and the wearer's motion support (walking support) can be maintained.

Further, it is preferable that the lower end 341a of the rear high-pressure region 341 is inclined downward from the central portion 3412 in the left-right direction of the rear high-pressure region 341 toward both end portions 3411. That is, it is preferable that the length of the rear high pressure region 341 in the vertical direction gradually increases from the central portion 3412 of the rear high pressure region 341 toward the both end portions 3411.

In this way, the posterior high-pressure region 341 can form a shape closer to the wearer's gluteus medius 360 (FIG. 14A ). Therefore, the support force of the gluteus medius 360 by the rear high pressure region 341, that is, the wearer's motion support force (walking support force) can be improved. In addition, in the example shown in FIG. 12, the lower end 341 a of the rear high-pressure region 341 is inclined into a smooth curved shape, but it is not limited thereto, and for example, it may be inclined into a linear shape or a stepped shape.

In addition, the rear high-pressure region 341 is preferably arranged in the front-rear direction (the thickness direction of the rear belt portion 322) so as not to overlap the rear side portion of the absorbent core 311. With this, it is possible to suppress that the absorbent core material 311 shrinks in the left-right direction due to the rear high-pressure region 341 having a strong contraction force, thereby making the absorbent core material 311 having a large thickness into an uneven shape. That is, the flatness of the absorbent core 311 is maintained, and it becomes less likely to cause discomfort during wearing. Therefore, the wearing comfort of the paper diaper 300 can be improved. In addition, the back side part of the absorbent core 311 refers to a part on the back side (back side) from the center of the absorbent core 311 in the longitudinal direction. Moreover, not limited to the aforementioned structure, the rear high-pressure region 341 and the absorbent core 311 may overlap.

In addition, the rear low pressure region 331 is preferably arranged at least between the lower end 341a of the rear high pressure region 341 and the upper end 311a of the rear side portion of the absorbent core 311. Thereby, the rear low-pressure region 331 can be properly fitted to a wider range of the gluteus maximus of the wearer. Therefore, the positional displacement of the paper diaper 300 can be suppressed.

Moreover, not only the central portion of the rear belt portion 322 in the left-right direction, but also at least a part of both end portions, the rear low-pressure region 331 preferably extends in the left-right direction. Specifically, the length of 1/3 of the entire length of the rear side belt portion 322 from both ends in the left-right direction is used as both end portions, and the rear low-pressure region 331 is preferably disposed until at least a part of the both end portions. More preferably, the rear low-pressure region 331 is arranged across the pair of locking portions 324. Thereby, the rear low-pressure region 331 can be properly fitted to a wider range of the gluteus maximus of the wearer.

As shown in FIG. 13, it is preferable that the stretchable film 343 (front stretchable member) included in the front high-pressure region 342 is continuously arranged in the left-right direction across the pair of locking portions 324. Further, in the locking portion 324, the rear high-pressure region 341 is preferably connected to the front high-pressure region 342. That is, it is preferable that the positions of the rear high-pressure region 341 and the front high-pressure region 342 in the up-down direction in the locking portion 324 coincide with some or all.

In this way, the rear high-pressure region 341 and the front high-pressure region 342 form an annular expansion and contraction region. Therefore, the paper diaper 300 is close to the waist of the wearer, and the positional displacement of the paper diaper 300 can be suppressed. In addition, since the tightening pressure of the posterior high-pressure region 341 is increased, the support force of the gluteus medius 360 by the posterior high-pressure region 341 can be improved.

In the rear high-pressure region 341 and the front high-pressure region 342 of this embodiment, the stretchable films 343A to 343F (rear stretchable members) and 343a to 343f (front stretchable members) are arranged at intervals in the vertical direction Plural. In this case, it is preferable that the uppermost stretchable films 343A and 343a are connected to each other and the lowermost stretchable films 343F and 343f are connected to each other in the locking portion 324. With this, the aforementioned effect can be obtained. Ideally, the second stretchable film 343B, 343b from the top, the third stretchable film 343C, 343c from the top, the fourth stretchable film 343D, 343d from the top, It is preferable that the fifth stretchable films 343E and 343e are also connected to the locking portion 324 from the top.

However, it is not limited to the foregoing structure, and the rear high-pressure region 341 and the front high-pressure region 342 (front elastic member) may be arranged offset in the vertical direction at the locking portion 324. In addition, the front belt portion 321 may not have the high-pressure region 340 or the elastic member. For example, the stretchable film 343 may not be arranged in the front belt portion 321, and only the stretchable nonwoven fabric 3215 may be arranged. In addition, a linear elastic member such as a rubber thread may be arranged instead of the stretchable film 343, the stretchable nonwoven fabric 3215, and the like. In these cases, similarly, the stretchable nonwoven fabric 3215 and the linear elastic member are continuous between the pair of locking portions 324 in the left-right direction, and are connected to the rear high-pressure region 341 on the locking portion 324. With this, the aforementioned effect can be obtained.

Furthermore, as shown in FIG. 14B, the gluteus medius muscle 360 is located from the back side of the human body to the side. Therefore, as shown in FIG. 13, the left and right ends 3421 of the front high pressure region 342 are longer in the vertical direction than the central part 3422 (L33>L34), and the front high pressure region The upper end 342a of 342 is located above.

In this way, the left and right ends 3421 of the front high-pressure area 342 are located above, and if the length (L33) in the up-down direction is long, the front high-pressure area 342 can be in close contact with the wearer's side hips muscle. Therefore, the rear high-pressure region 341 and the front high-pressure region 342 can tighten the wider range of the wearer's gluteus maximus. Therefore, the wearer's motion support force (walking support force) can be improved.

In addition, the central portion 3422 of the front high-pressure region 342 in the left-right direction is located lower than the bulging of the abdomen of the wearer. Therefore, the front high-pressure area 342 does not excessively tighten the wearer's abdomen, and the wearing comfort of the paper diaper 300 can be improved.

In addition, the positional relationship between the length (L33, L34) in the up-down direction and the upper end (342a) may be established at least at both ends in the left-right direction of the front high-pressure region 342 at the center. It is desirable that the center portion 3422 between the both ends 1/3 of the entire length of the 1/3 length from the both ends in the left-right direction of the front high-pressure region 342 be formed. However, the shape of the front high-pressure region 342 is not limited to the aforementioned structure.

In addition, it is preferable to arrange the front low-pressure region 332 so as to be adjacent to the upper side of the front high-pressure region 342 at the central portion of the front belt portion 321 in the left-right direction. Specifically, the front low-pressure region 332 only needs to be located at least in the center of the front-side belt portion 321 in the left-right direction, and ideally, 1/3 of the entire length from both ends of the front-side belt portion 321 in the left-right direction is used as both ends. The front low-pressure region 332 may be located in the center between them. With this, since the front low-pressure region 332 can be properly fitted to the abdomen of the wearer, the positional displacement of the paper diaper 300 can be suppressed.

In addition, the front high-pressure region 342 is preferably arranged in the front-rear direction so as not to overlap the front side portion of the absorbent core 311. With this, it can be suppressed that the absorbent core 311 shrinks in the left-right direction due to the front high-pressure region 342. Therefore, maintaining the flatness of the absorbent core 311 makes it less likely to cause discomfort during wearing, and the wearing comfort of the paper diaper 300 can be improved. In addition, the front side part of the absorbent core 311 refers to a part on the front side (abdomen side) from the center of the absorbent core 311 in the longitudinal direction. Moreover, not limited to the foregoing structure, the front high-pressure region 342 and the absorbent core 311 may overlap.

In addition, a plurality of stretchable films 343A to 343F and 343a to 343f included in the rear high-pressure region 341 and the front high-pressure region 342 are arranged at intervals in the vertical direction. In the portion adjacent to the stretchable film 343 in the vertical direction, the number of laminated sheets of the sheet is reduced compared to the portion where the stretchable film 343 is arranged, and therefore, the air permeability in the thickness direction is good. Therefore, the humid air in the paper diaper 300 can be released from the portion between the stretchable films 343 toward the non-skin side in the thickness direction, and the stuffiness in the paper diaper 300 can be suppressed. Therefore, the wearing comfort of the paper diaper 300 can be improved.

In particular, when the stretchable film 343 is arranged in the high-pressure region 340, the air permeability in the thickness direction is lowered than when the stretchable nonwoven fabric or the linear elastic member is arranged. Therefore, it is preferable to arrange the stretchable film 343 at intervals in the vertical direction. However, it is not limited to the aforementioned structure, and the stretchable film 343 may be arranged in the entire region of the high-pressure region 340.

In addition, in each of the rear high-pressure region 341 and the front high-pressure region 342, the two end portions 3411, 3421 in the left-right direction are adjacent to the central portions 3412, 3422, and the stretchable films 343A-343F, 343a adjacent to the up-down direction It is better to make the interval (length in the vertical direction) of ~343f wider. As a result, in each of the rear high pressure region 341 and the front high pressure region 342, the left and right end portions 3411, 3421 are longer in the vertical direction than the central portions 3412, 3422 (L31>L32, L33 ＞L34). Therefore, the rear high-pressure region 341 and the front high-pressure region 342 can fit snugly to the gluteus medius.

In addition, it is preferable that the stretchable member (here, stretchable film 343) disposed in the rear high-pressure region 341 and the front high-pressure region 342 be a sheet-like stretchable member.

As a result, the rear high-pressure region 341 and the front high-pressure region 342 can be closely fitted to the wearer's gluteus medius muscle, so that the wearer's gluteus medius muscle can be tightened to a wider range. Therefore, the wearer's motion support force (walking support force) can be improved. In addition, in order to obtain the same degree of tightening pressure as the sheet-like elastic member by the linear elastic member, it is necessary to increase the elongation ratio of the linear elastic member. As a result, the linear elastic member is locally intimately attached to the wearer, and the superiority of the wearing comfort of the paper diaper 300 is reduced.

Similarly, it is preferable that the stretchable members (here, stretchable nonwoven fabrics 3215 and 3225) arranged in the rear low-pressure region 331 and the front low-pressure region 332 be sheet-like stretchable members. As a result, the rear low-pressure area 331 and the front low-pressure area 332 can be applied to the wearer's abdomen, gluteus maximus, etc., so that the abdomen, gluteus maximus, etc. are not locally tied, and the paper diaper can The wearing comfort of 300 becomes better. In addition, a stretchable nonwoven fabric may be disposed instead of the stretchable film 343, and the stretchable nonwoven fabric may be stacked in two layers in the high pressure region 340.

However, it is not limited to the aforementioned structure. For example, the linear elastic members are arranged at intervals in the vertical direction to form the low-pressure region 330 and the high-pressure region 340 is formed so as to cover the wide range of the front belt portion 321 and the rear belt portion 322. Other stretchable members (stretchable films, stretchable nonwoven fabrics, linear elastic members, etc.) are arranged over the linear elastic members. Conversely, it is also possible to arrange sheet-like stretchable members (stretchable film, stretchable nonwoven fabric) to form a low-pressure region 330 over a wide range of the front belt section 321 and the rear belt section 322 to form a high pressure In the region 340, a linear elastic member is arranged overlapping the aforementioned sheet-like stretchable member. In addition, a stretchable film may be arranged over a wide range of the front side belt portion 321 and the rear side belt portion 322 to form a low-pressure region 330, and a sheet may be arranged to overlap the aforementioned stretchable film at a portion where the high-pressure region 340 is formed Shaped stretchable members (stretchable film, stretchable nonwoven fabric). In addition, the structure of the low-pressure region 330 and the high-pressure region 340 may be the same, and the elongation ratio of the elastic member of the high-pressure region 340 may be increased compared to the elongation ratio of the elastic member of the low-pressure region 330.

Moreover, the rubber cord 327 (elastic member) for foot circumferences may be arrange|positioned along the pair of foot circumference openings 300b of the paper diaper 300. As a result, the rubber thread 327 for foot circumference is in close contact with the foot circumference of the wearer (the contour part of the buttocks). Therefore, it is possible to suppress the paper diaper 300 from being excessively pulled up during wearing and wearing. Therefore, the state in which the rear high-pressure region 341 is close to the gluteus medius muscle can be maintained, and the wearer's motion support (walking support) can be maintained. Furthermore, a sheet-like stretchable member may be arranged along the foot opening 1b instead of the rubber thread. In addition, it is not limited to the above-mentioned structure, and the stretchable member may not be arranged along the foot opening 1b.

===Third Embodiment Form=== The third embodiment will be described below as an example of a pants-type disposable diaper as an underpants type disposable diaper. However, the invention is not limited to this, and the short-sleeved disposable diaper of the present invention can also be applied as, for example, a disposable disposable diaper for children (for infants), physiological pants, and the like.

<<Basic structure of paper diaper 500>> Fig. 15 is a schematic perspective view of a disposable paper disposable diaper 500 (hereinafter, also referred to as a paper diaper 500). Fig. 16 is a schematic plan view of the paper diaper 500 in an unfolded and extended state. FIG. 17 is a schematic cross-sectional view taken along line I-I (the center in the left-right direction) of FIG. 16. FIG. 18A is a diagram showing an example of the joint portion 530 of the front belt portion 521 and the rear belt portion 522, and FIG. 18B is a schematic cross-sectional view of the front belt portion 521 and the rear belt portion 522. FIG.

The paper diaper 500 has an up-down direction, a left-right direction, and a front-back direction crossing each other, and as shown in FIG. 17, has a thickness direction in which each member is laminated. In the up-down direction, the side that becomes the waist side of the wearer is set to the upper side, and the side that becomes the wearer's crotch side is set to the lower side. In the front-back direction, the side to be the abdomen side of the wearer is set to the front side, and the side to be the back side of the wearer is set to the rear side. In the thickness direction, the side abutting on the wearer is called the skin side, and the opposite side is called the non-skin side.

The paper diaper 500 has an absorbent body 510; and an outer body 520 on the non-skin side of the absorbent body 510. The exterior body 520 has: a belt portion 521 (belt portion) disposed on the front side of the wearer's abdomen side; a belt portion 522 (belt portion) disposed on the back side of the wearer's back side; and a crotch connecting these部523.

In addition, in the paper diaper 500 of this embodiment, the exterior body 520 is composed of three members (the front belt part 521, the rear belt part 522, and the crotch part 523), but it is not limited thereto. For example, the front belt part 521, the rear belt part 522, and the crotch member 523 may be one member. In addition, it may have a structure without the crotch portion 523.

In the unfolded paper diaper 500 shown in FIG. 16, the front belt portion 521 is located at one end of the absorbent body 510 in the longitudinal direction, and the rear belt portion 522 is located at the other end of the absorbent body 510 in the longitudinal direction. In the unfolded paper diaper 500, the absorptive body 510 is folded at the center slightly in the longitudinal direction, and the left and right sides of the front belt part 521 and the left and right sides of the rear belt part 522 are paired together. The stop portion 524 is locked, thereby forming a shorts type as shown in FIG. 15. That is, the longitudinal direction of the absorbent body 510 is along the up-down direction of the paper diaper 500, the front side belt portion 521 and the rear side belt portion 522 are connected in a ring shape, and a waist opening 500a is formed at the upper end, and both A pair of foot openings 500b are formed on the side. In addition, as a method of locking by the locking portion 524, for example, welding, bonding by an adhesive, and the like can be mentioned.

As shown in FIG. 17, the absorbent body 510 includes: an absorbent core 511; a liquid-permeable top sheet 512 on the skin side of the absorbent core 511; and a back surface on the non-skin side of the absorbent core 511片513。 513. The back sheet 513 of this embodiment has a double-layer structure of a liquid-impermeable sheet 513a and a hydrophobic liquid-permeable sheet (for example, a hydrophobic nonwoven fabric) 513b disposed on the non-skin side.

The absorbent core 511 is a member that absorbs and holds excretory fluid such as urine, and is formed of, for example, liquid-absorbent fibers such as pulp fibers mixed with a superabsorbent polymer (SAP). Although not shown, the absorbent core 511 may be coated on its outer peripheral surface with a liquid-permeable sheet such as tissue or non-woven fabric.

As shown in FIG. 16, the front belt portion 521 and the rear belt portion 522 respectively have a waist area 5121, 5221 that overlaps with the locking portion 524 in the up-down direction; and a lower side than the waist area 5121, 5221 Crotch side regions 5212, 5222.

The crotch side regions 5212 and 5222 are formed in a slightly trapezoidal shape, and the lateral width (length in the left-right direction) becomes narrower toward the lower side. In addition, the crotch region 5222 of the rear belt portion 522 is larger than the front belt portion 521, and can cover the wearer's buttocks.

As shown in FIG. 17, the front belt portion 521 and the rear belt portion 522 respectively include: skin-side sheets 5213 and 5223; non-skin-side sheets 5214 and 5224; and stretchable nonwoven fabrics 5215 and 5225 located between the sheets. Examples of the skin-side sheets 5213 and 5223 and the non-skin-side sheets 5214 and 5224 include flexible sheets composed of spunbonded nonwoven fabric, SMS nonwoven fabric, and the like. The skin-side sheets 5213 and 5223 and the non-skin-side sheets 5214 and 5224 are non-stretchable sheets that are not substantially stretchable.

The stretchable nonwoven fabrics 5215 and 5225 are made into sheets that stretch at least in the left-right direction of the paper diaper 500. In addition, the stretchable nonwoven fabrics 5215 and 5225 are nonwoven fabrics including stretchable fibers and non-stretchable fibers (that is, stretchable fibers having a lower shrinkage than stretchable fibers).

Examples of the stretchable nonwoven fabrics 5215 and 5225 include stretchable fibers of a polyurethane elastomer having a thermoplastic elastomeric fiber having elasticity, and polyolefin having a thermoplastic resin that is inelastic The non-stretchable polypropylene-based (PP) non-stretchable fiber is a non-woven fabric that is appropriately stretched by gear stretching or the like. The stretching process may be carried out in a direction orthogonal to each other (the left-right direction and the up-down direction of the paper diaper 500), or may be carried out only in a predetermined direction (the left-right direction of the paper diaper 500). Furthermore, in the case of stretching only in a predetermined direction, although the stretchability in the predetermined direction will occur, the orientation of all the fibers may not necessarily be along the predetermined direction, so it will also stretch in the direction orthogonal to the predetermined direction Sex.

The skin-side sheets 5213 and 5223, the non-skin-side sheets 5214 and 5224, and the stretchable nonwoven fabrics 5215 and 5225 are joined by the joining portion 530 in a state where the stretchable nonwoven fabrics 5215 and 5225 are extended in the left-right direction. As shown in FIG. 18A, it is preferable that the joining portion 530 is dispersed in the left-right direction and the up-down direction of the paper diaper 500. As a result, when the paper diaper 500 shrinks, the skin-side sheets 5213 and 5223 and the non-skin-side sheets 5214 and 5224 are rolled up between the joining portions 530 to form convex portions protruding outward in the thickness direction. In addition, the stretchable nonwoven fabrics 5215 and 5225 are stretched in the thickness direction because the stretchable fibers entangle (collect) the non-stretchable fibers and shrink. Therefore, the convex portions are supported by the fibers of the stretchable nonwoven fabrics 5215 and 5225 and are not easily crushed, and the cushioning properties of the convex portions are improved. Therefore, the front-side belt portion 521 and the rear-side belt portion 522 can improve the contact of the wearer's skin. In addition, the user can be given the impression of a soft paper diaper 500 visually.

In addition, the crotch portion 523 has a structure in which a stretchable nonwoven fabric 5233 is arranged between the skin-side sheet 5231 and the non-skin-side sheet 5232, similarly to the front belt section 521 and the rear belt section 522. However, the structure of the crotch portion 523 is not particularly limited. For example, a structure in which the stretchable nonwoven fabric 5233 is arranged between the absorbent body 510 and the non-skin side sheet 5232 may not include the skin side sheet 5231.

＜＜About high pressure area 560＞＞ Fig. 19 is a schematic plan view of the front belt portion 521. Fig. 20 is a schematic plan view of the rear belt portion 522.

The front belt portion 521 and the rear belt portion 522 are waist areas 5121, 5221 that overlap with the locking portion 524 in the up-down direction, and have a waist stretch area 540, a low pressure area 550, and a high pressure area 560, respectively.

The waist stretchable area 540 is a stretchable area along the edge of the waist opening 500a, and a plurality of rubber threads 541 that stretch in the left-right direction of the paper diaper 500 are arranged at intervals in the vertical direction. As shown in FIG. 17, the waist elastic region 540 may be a structure in which elastic nonwoven fabrics 5215 and 5225 are not arranged, or a structure in which elastic nonwoven fabrics and rubber threads 541 are laminated (not shown).

The low-pressure region 550 and the high-pressure region 560 are regions arranged below the waist elastic region 540, are adjacent to each other, and have elasticity in the left-right direction. The low-pressure region 550 is a region where stretchable nonwoven fabrics 5215 and 5225 are arranged between the skin-side sheets 5213 and 5223 and the non-skin-side sheets 5214 and 5224. The high-pressure region 560 is a region where the stretchable nonwoven fabrics 5215 and 5225 and the stretchable film 565 are arranged between the skin-side sheets 5213 and 5223 and the non-skin-side sheets 5214 and 5224. The stretchable film 565 is a sheet that stretches at least in the left-right direction of the paper diaper 500.

As the stretchable film 565, for example, an elastic member having elasticity such as a sheet-like uniform thickness is melted by elastic resin such as urethane and styrene. In addition, for example, it may be a stretchable film in which a polyolefin layer is integrated on the front and back surfaces of the elastomer layer. In the case of using this stretchable film, since the polyolefin layer does not have stretchability, it has stretchability to stretch the film. By having a polyolefin layer on the surface, there is an advantage that fusion welding with polyolefin fiber nonwoven fabric becomes easy.

Since the high-pressure region 560 is provided with the stretchable film 565, the tightening pressure when the paper diaper is worn can be increased compared to the low-pressure region 550. In detail, the force for extending the high-pressure area 560 of the unit width in the up-and-down direction to the left-right direction is greater than the force for extending the low-pressure area 550 of the unit-width in the vertical direction to the left-right direction by the unit length . That is, the contraction force acting in the left-right direction in the high-pressure area 560 per unit width in the up-down direction is greater than the contraction force acting in the left-right direction in the low-pressure area 550 per unit width in the vertical direction In this way, the high-pressure area 560 can be strongly adhered to the wearer.

However, it is not limited to disposing the stretchable film 565 all over the high-pressure region 560. For example, as shown in FIGS. 19 and 20, a plurality of stretchable films 565a to 565f and 565A to 565F extending in the left-right direction may be arranged at intervals in the vertical direction. In this case, the upper end of the uppermost stretchable film 565, the lower end of the lowermost stretchable film 565, and the pair of locking portions among the plural stretchable films 565 arranged in the same shape (same trajectory) The area surrounded by 524 is regarded as a high pressure area.

Specifically, as shown in FIG. 19, the front belt portion 521 has a "first high pressure area 561" (with 5a, 5b, 5a, 5b, and 3) having three stretchable films 565a to 565c in a downward convex shape. 5c, 5d)); and the "second high pressure area 562" (three surrounded by 5e, 5f, 5g, 5h) with three stretchable films 565d~565f horizontal to the left and right direction of the paper diaper 500 area).

In addition, as shown in FIG. 20, the rear belt portion 522 has a "third high pressure region 563" (with 5i, 5j, and 5k) in which three stretchable films 565A to 565C having a convex shape toward the upper side are arranged , 5l area); and "4th high pressure area 564" (area surrounded by 5m, 5n, 5o, 5p) with three stretchable films 565D~565F horizontal to the left and right direction of the paper diaper 500 ).

In addition, in the upper end portions of the front belt portion 521 and the rear belt portion 522 of the present embodiment, stretchable nonwoven fabrics 5215 and 5225 (see FIG. 17) are arranged in the entire area below the waist stretch area 540. Therefore, a region other than the first high pressure region 561 and the second high pressure region 562 among the regions below the waist region 5211 of the front belt portion 521 and the waist region 540 is defined as the low pressure region 550. Similarly, a region other than the third high pressure region 563 and the fourth high pressure region 564 of the waist region 5221 of the rear belt portion 522 and the region below the waist elastic region 540 is defined as the low pressure region 550. However, in the case where the front belt portion 521 and the rear belt portion 522 have the rubber line 527 for the foot circumference along the foot opening 500b, the portion where the rubber line 527 for the foot circumference is disposed is removed from the low-pressure region 550.

Furthermore, a comparison of the force for extending the high-pressure area 560 of the unit width in the up-and-down direction to the left-right direction and the force for extending the low-pressure area 550 of the unit width in the up-and-down direction to the left-right direction , It can be done by a conventional method. For example, all or part of the high-pressure region 560 and the low-pressure region 550 are cut out from the rear belt portion 522 or the front belt portion 521 as samples, respectively. Then, the average value of the vertical length of each sample was calculated. Then, the both ends of the sample corresponding to the left-right direction of the paper diaper 500 are pinched by the jig of the testing machine. Measure the load obtained by separating the unit length between the clamps and extending the sample. In addition, the load of each sample may be divided by the average value of the length of each sample in the vertical direction for comparison. In addition, as the low-pressure region 550, when a range including a portion where the rubber line for foot circumference 527 is arranged is cut out, the load is measured in a state where the rubber line for foot circumference 527 does not cause stretchability.

In addition, the high-pressure region 560 may have a higher tightening pressure than the low-pressure region 550, and is not limited to the structure in which the stretchable film 565 is laminated on the stretchable nonwoven fabrics 5215 and 5225. For example, the linear elastic members are arranged at intervals in the vertical direction to form the low-pressure region 550 and the high-pressure region 560 is formed so as to cover the wide range of the front belt portion 521 and the rear belt portion 522. Other stretchable members (stretchable films, stretchable nonwoven fabrics, linear elastic members, etc.) are arranged over the linear elastic members. Conversely, it is also possible to arrange sheet-like stretchable members (stretchable film, stretchable nonwoven fabric) to form a low-pressure region 550 over a wide range of the front belt portion 521 and the rear belt portion 522 to form a high pressure In the region 560, a linear elastic member is arranged to overlap with the above-mentioned sheet-like elastic member. In addition, a stretchable film may be arranged over a wide range of the front belt portion 521 and the rear belt portion 522 to form a low-pressure region 550, and a sheet may be arranged to overlap the stretchable film at a location where the high-pressure region 560 is formed Shaped stretchable member (stretchable film, stretchable nonwoven fabric). In addition, the structure of the low-pressure region 550 and the high-pressure region 560 may be the same, and the elongation ratio of the elastic member of the high-pressure region 550 may be increased compared to the elongation ratio of the elastic member of the low-pressure region 550.

As described above, the high-pressure region 560 is partially provided in the front-side belt portion 521 and the rear-side belt portion 522. Therefore, the high-pressure area 560 can be used to fasten the parts to be fastened by the wearer (for example, the part to prevent the diaper 500 from shifting and falling off, the part to support the motion of the wearer, etc.). In addition, the low-pressure region 550 also has elasticity. Therefore, the low-pressure region 550 can be properly intimately adhered to the wearer except for the part to be fastened. Therefore, it is possible to prevent the wearer from being excessively fastened, and to improve the fit of the paper diaper 500.

Furthermore, in the paper diaper 500 of the present embodiment, the skin-side sheets 5213 and 5223, the non-skin-side sheets 5214 and 5224 and the stretchable nonwoven fabrics 5215 and 5225 are made into white sheets, and the stretchable film 565 is made into colored sheets (for example, coloring) There are slices of purple, blue, pink, etc.). That is, the color of the stretchable film 565 is made different from the color of other sheets. As a result, when the front belt portion 521 and the rear belt portion 522 are viewed from at least one of the non-skin side and the skin side, a part of the high-pressure region 560 having the stretchable film 565 is formed differently from the low-pressure region 550 s color.

In this way, by recognizing the high-pressure area 560, the user (wearer, caregiver, etc.) of the paper diaper 500 can grasp the position of the high-pressure area 560 of the paper diaper 500. Therefore, the user can adjust the upward lifting condition of the paper diaper 500 while confirming that the high-pressure area 560 is located at the portion to be fastened by the wearer. Therefore, the paper diaper 500 can be correctly applied to the appropriate position of the wearer, and the effect of the high-pressure area 560 (offset prevention of the paper diaper 500, motion support of the wearer, etc.) can be obtained. In addition, it is possible to prevent the high-pressure region 560 from being located at a place where the wearer does not have to be fastened (for example, the bulging part of the lower abdomen and buttocks), and to suppress a reduction in the wearing comfort of the paper diaper 500.

More preferably, when the front belt portion 521 and the rear belt portion 522 are viewed from at least one of the non-skin side and the skin side, the outline portion and the low-pressure area 550 of the high-pressure area 560 in the vertical direction of the paper diaper 500 Different colors are better. For example, in the case of the first high-pressure region 561 of the front belt portion 521, the colored stretchable film 565a is located at the upper end, and the colored stretchable film 565c is located at the lower end. Similarly, in the second to fourth high-pressure regions 562 to 564, the colored stretchable film 565 is located at the upper end and the lower end.

As a result, the boundary between the high-pressure area 560 and the low-pressure area 550 becomes clear, and the user can more easily grasp the position of the high-pressure area 560. Therefore, the paper diaper 500 becomes easy to put on a proper position of the wearer.

Furthermore, at least a part of the high-pressure region 560 may be different in color from the low-pressure region 550, and may be a part of a color other than the outline of the high-pressure region 560, or a different color in the entire high-pressure region 560. Moreover, it is not limited to the high-pressure region 560 being colored. That is, the material constituting the high-pressure region 560 may be white, and the material constituting the low-pressure region 550 may be colored in color. In addition, the high-pressure region 560 and the low-pressure region 550 may be colored in different colors other than white.

FIG. 21 is a graph showing test results regarding the identification of the high-pressure region 560. With regard to the different colors of the high-pressure region 560 and the low-pressure region 550, if there is a color difference of a certain degree, the position of the high-pressure region 560 can be grasped and tested. First, prepare samples 1 to 6 of the belt part of various structures. The structures of samples 1 to 6 are described below.

Sample 1 used spunbonded nonwoven fabrics with a basis weight of 27 g/m ² as skin-side sheets 5213 and 5223 and non-skin-side sheets 5214 and 5224. As the stretchable nonwoven fabrics 5215 and 5225, a nonwoven fabric having a basis weight of 28 g/m ² and an elongation ratio of 2.3 times was used. In addition, a dark beige stretchable film 565 is arranged in a portion between the non-skin side sheets 5214 and 5224 and the stretchable nonwoven fabrics 5215 and 5225. The configuration of the stretchable film 565 is as shown in FIG. 16 (the same is true for other samples).

Sample 2 has the same structure as Sample 1 except that the color of the stretchable film 565 is light beige.

Sample 3 used spunbonded non-woven fabric with a basis weight of 20 g/m ² as skin-side sheets 5213 and 5223 and non-skin-side sheets 5214 and 5224. As the stretchable nonwoven fabrics 5215 and 5225, a nonwoven fabric having a basis weight of 28 g/m ² and an elongation ratio of 2.3 times was used. In addition, a dark beige stretchable film 565 is arranged in a portion between the non-skin side sheets 5214 and 5224 and the stretchable nonwoven fabrics 5215 and 5225.

Sample 4 has the same structure as Sample 3 except that the color of the stretchable film 565 is light beige.

Sample 5 is a spunbonded non-woven fabric with a basis weight of 19 g/m ² and a white pigment (titanium oxide) content lower than that of samples 1 to 4 as skin-side sheets 5213 and 5223 and non-skin-side sheets 5214 and 5224. As the stretchable nonwoven fabrics 5215 and 5225, a nonwoven fabric having a basis weight of 28 g/m ² and an elongation ratio of 2.3 times was used. In addition, a dark beige stretchable film 565 is arranged in a portion between the non-skin side sheets 5214 and 5224 and the stretchable nonwoven fabrics 5215 and 5225.

Sample 6 has the same structure as Sample 5 except that the color of the stretchable film 565 is light beige.

Also, the subject was asked to evaluate whether the samples 1 to 6 on the skin side and the samples 1 to 6 from the non-skin side can distinguish between the high-pressure area 560 and the low-pressure area 550. In addition, in the state of wearing samples 1 to 6 on a doll of an appropriate size, please be evaluated by the experimenter. The evaluation is conducted in three stages, that is, the situation where the high-pressure area 560 and the low-pressure area 550 can be distinguished is evaluated as "○", the situation that can be distinguished but not easy to understand is evaluated as "△", and the situation where it is impossible to distinguish is evaluated as "×". The paper diaper 500 is a paper diaper for adults. Therefore, the subjects were 5 male and female adults aged 30 to 50 years. The test was conducted under a fluorescent lamp in the house (illuminance 407Lx), with the horizontal distance between samples 1 to 6 and the subject being separated by 40 cm.

Moreover, the color difference ΔE* of the high-pressure region 560 and the low-pressure region 550 was measured when the samples 1 to 6 were viewed on the skin side and the samples 1 to 6 were viewed from the non-skin side.

The color difference ΔE* was measured using a color difference meter (this time is a color measurement color difference meter ZE-6000 manufactured by Nippon Denshoku Industries Co., Ltd.). The measurement method is reflection, and the sample port is 30 mm in diameter. First, the sample to be measured (belt portion of the paper diaper 500) is loaded in a natural state. When measuring the color difference ΔE* from the non-skin side, the non-skin side of the sample is faced up, and when measuring the color difference ΔE* from the skin side, the sample is measured with the skin side up.

In addition, measurement is performed on a plurality of random parts of the high-pressure region 560 (five parts this time), and the respective measurement results (a* value and b* value of the L*a*b color system) are obtained. The average value of the measurement results of a plurality of locations is used as the measurement result of the high-pressure region 560. Similarly, measurement is performed on a plurality of random parts (five parts this time) of the low pressure region 550, and the respective measurement results (a* value and b* value) are obtained. The average value of the measurement results of a plurality of locations is used as the measurement result of the low-pressure region 550.

In addition, in the high-pressure region 560, when a portion of a color different from the low-pressure region 550 (a portion where the colored stretchable film 565 is disposed) is a part, a different-colored portion and a non-different-colored portion that are different from the low-pressure region 550 are mixed. The measurement site is included in a plurality of random measurement sites.

Further, based on the measurement result of the high pressure region 560 and the measurement result of the low pressure region 550, the difference ΔE* is calculated by the following calculation formula. ΔE*={(Δa*)2＋(Δb*)2}1/2

Furthermore, the general definition of color difference also includes the L* value (brightness). However, in the case of paper diapers, the L* value is easily changed according to the difference in the number of laminated sheets of the non-woven fabric, and as a result, the color difference will also change. Therefore, there may be a difference between the color difference calculated with the L* value and the color actually seen. Therefore, the difference ΔE* is calculated without including the L* value.

The above test results are collectively shown in the table of FIG. 21. The color difference ΔE* (sample) when all the subjects (A to E) can recognize the high-pressure region 560 and the low-pressure region 550 (○), the recognition of the high-pressure region 560 is regarded as [○]. From the results of the table, when the color difference ΔE* is equal to or greater than [1.45], the visibility of the high-pressure region 560 becomes [○].

Therefore, when viewing the front belt portion 521 and the rear belt portion 522 from at least one of the non-skin side and the skin side, in the high-pressure region 560 and the low-pressure region 550, the L*a*b color should be When the difference of a* value is Δa* and the difference of b* value is Δb*, when the difference ΔE* is calculated by the following calculation formula, ΔE*={(Δa*)2＋(Δb*)2}1/2 The color difference ΔE* is preferably 1.45 or more.

As a result, the high-pressure region 560 and the low-pressure region 550 can be easily distinguished, and the user can easily grasp the position of the high-pressure region 560. Therefore, the paper diaper 500 becomes easy to put on a proper position of the wearer. In addition, the measurement method of the color difference ΔE* is performed by the method demonstrated by the said test, or the method equivalent to it.

Also, so far, when the front belt portion 521 and the rear belt portion 522 are viewed from at least one of the non-skin side and the skin side, the high-pressure region 560 and the low-pressure region 550 may have different colors. However, it is more desirable that, when the front belt portion 521 and the rear belt portion 522 are viewed from the non-skin side (outside), at least a part of the high-pressure region 560 and the low-pressure region 550 may have different colors, that is, high The color difference ΔE* of the pressure region 560 and the low pressure region 550 is preferably 1.45 or more.

As a result, the user can easily recognize that the paper diaper 500 has the high-pressure area 560, and the user can install the paper diaper 500 while being aware of the high-pressure area 560. In addition, by grasping the position of the high-pressure region 560 from the non-skin side, it becomes easy to align the high-pressure region 560 with the part to be fastened by the wearer. Therefore, the paper diaper 500 becomes easy to put on a proper position of the wearer.

In addition, the stretchable member forming the high-pressure region 560, that is, the stretchable film 565 of the present embodiment is preferably colored differently from the low-pressure region 550. Thereby, the area of the high-pressure area 560 recognized by the user coincides with the area where the tightening pressure is actually high. Therefore, the stretchable film 565 becomes easy to obtain the effect of the high-pressure region 560 at the portion where the wearer is to be fastened.

However, it is not limited to the aforementioned structure. At least one of other materials (skin-side sheets 5213, 5223, non-skin-side sheets 5214, 5224, stretchable nonwoven fabrics 5215, 5225) disposed in the high-pressure region 560 may be colored differently from the low-pressure region 550 s color. In this case, for example, even when the stretchable film 565 is intermittently arranged in the vertical direction, the entire area of the high-pressure area 560 can be colored. In addition, even when the stretchable film 565 is arranged in the entire area of the high-pressure area 560, it is possible to color a part (for example, the outline portion) of the high-pressure area 560.

In addition, when the stretchable film 565 is colored, it is preferable to arrange the stretchable film 565 on the non-skin side of the plurality of materials stacked in the thickness direction of the front belt portion 521 and the rear belt portion 522. In this embodiment, as shown in FIG. 17, a stretchable film 565 is arranged between the non-skin-side sheets 5214 and 5224 and the stretchable nonwoven fabrics 5215 and 5225.

As a result, the visibility from the high-pressure area 560 on the non-skin side can be improved. Therefore, the high-pressure area 560 becomes easy to be recognized by the user, and it becomes easy to align the high-pressure area 560 with the part of the wearer to be fastened. However, it is not limited to the aforementioned structure, and the stretchable film 565 may be disposed closer to the skin-side sheets 5213 and 5223 than the non-skin-side sheets 5214 and 5224.

Further, the colored stretchable member forming the high-pressure region 560 is like a stretchable film 565 of this embodiment, and is preferably a sheet-like stretchable member. As a result, the area of the different-color portion, which is a color different from the low-pressure region 550, becomes larger than the case where the stretchable member is a rubber wire. Therefore, the high-pressure area 560 becomes prominent and becomes easy for the user to recognize. In addition, it becomes easy to align the high-pressure region 560 with the part to be fastened by the wearer.

In addition, in the case where the stretchable member forming the high-pressure region 560 is a sheet-like stretchable member, the high-pressure region 560 can be strongly adhered to the wearer with a face, and can prevent local tightening. Therefore, the wearing comfort of the paper diaper 500 can be improved, and traces of the stretchable member are less likely to remain on the wearer's skin.

In addition, a plurality of colored stretchable members (stretchable film 565) forming the high-pressure region 560 are arranged at intervals in the vertical direction. As a result, the high-pressure area 560 is formed as a stripe pattern, and the stripe pattern becomes emphasized and becomes conspicuous, so that the user can easily recognize the high-pressure area 560. In addition, by partially coloring the high-pressure region 560, it is possible to prevent the user from recognizing that the paper diaper 500 is too tight.

FIG. 22 is an explanatory view of the bonding portion 530 formed on the stretchable film 565. FIG. As shown in FIG. 18B described above, the colored stretchable film 565 has a plurality of joints 530 and a sheet disposed closer to the non-skin side than the stretchable film 565 (in the case of this embodiment, it is a non-skin side sheet 5214, 5224) Intermittent bonding is preferred.

As a result, between the joints 530, the non-skin side sheets 5214 and 5224 float from the stretchable film 565, causing wrinkles (concavo-convex) caused by the non-skin side sheets 5214 and 5224. Therefore, the stretchable film 565 can be identified, and the stretchable film 565 can be prevented from being excessively conspicuous. That is, the hardness of the stretchable film 565 can be reduced by wrinkles. Therefore, it is possible to give the user the impression that the paper diaper 500 is soft and comfortable to wear.

Moreover, as shown in FIG. 22, the interval W2 of the joining portions 530 adjacent in the vertical direction is smaller than the length (width) W1 of the stretchable film 565 in the vertical direction (W1>W2), and it is The length of the stretchable film 565 (the length between the pair of locking portions 524 in the case of this embodiment) is preferably smaller in the interval L0 between the adjacent joining portions 530 in the left-right direction.

Thereby, a plurality of bonding portions 530 are arranged in the range of the up-down direction of the stretchable film 565, and a plurality of bonding portions 530 are arranged in the range of the left-right direction of the stretchable film 565. Therefore, wrinkles caused by the non-skin side sheets 5214 and 5224 can be generated more finely. Therefore, it is possible to give the user the impression that the paper diaper 500 is soft and comfortable to wear.

However, it is not limited to the aforementioned structure, and the entire area of the stretchable film 565 may be fitted to the non-skin side sheets 5214 and 5224. In this case, the stretchable film 565 becomes conspicuous, and the visibility of the high-pressure region 560 is improved.

In addition, when comparing the length of the stretchable film 565 and the interval of the joining part 530, it is sufficient to extend the front side belt part 521, the rear side belt part 522, etc., without wrinkles. Specifically, the dimensions of the members (for example, non-skin-side sheets 5214, 5224, etc.) constituting the front belt portion 521 and the rear belt portion 522 are extended to a length that is consistent with or close to the size of the member alone. The comparison of other lengths, positions, etc., which will be described later, is the same.

In addition, when a part of the high-pressure region 560 is a different color from the low-pressure region 550, the high-pressure region 560 has: a different-color portion 566 (an arrangement portion of the stretchable film 565) different in color from the low-pressure region 550; and The non-different color portion 567 other than the different color portion 566. In this case, it is preferable that at least one of the front belt portion 521 and the rear belt portion 522 has a higher proportion of different-colored portions 566 per unit area than the end portion in the center portion in the left-right direction.

For example, as shown in FIG. 19, in the front side belt portion 521, a portion of the first high-pressure region 561 and the second high-pressure region 562 overlap each other at the center in the left-right direction, and at the end in the left-right direction, the first height The pressure area 561 is separated from the second high pressure area 562. Therefore, in the central portion in the left-right direction, the proportion of the different-colored portion 566 per unit area becomes high. The rear belt portion 522 is the same.

The central parts in the left-right direction of the front belt part 521, the rear belt part 522, etc. are easier to notice to the user than the end parts. In this central part, by increasing the ratio of the different-colored parts 566 per unit area, It is easy for the user to recognize the high pressure area 560. However, it is not limited to the foregoing structure. For example, the ratio of the different-color portions 566 per unit area may be constant, or both end portions in the left-right direction may be higher than the central portion.

Further, as shown in FIGS. 19 and 20, the length L51 in the vertical direction from the upper end 560a of the high-pressure region 560 located in the center portion of the front belt 521 in the left-right direction to the waist opening 500a is related to the belt located in the rear It is preferable that the length L52 in the vertical direction from the upper end 560a of the high-pressure region 560 at the central portion in the left-right direction of the portion 522 to the waist opening 500a is different.

In this way, the user makes the front-back determination of the paper diaper 500 according to the position of the recognizable high-pressure region 560 in the up-down direction. Therefore, the paper diaper 500 can be correctly worn back and forth.

In addition, the relationship between the ratio of the aforementioned different-color portion 566 per unit area and the length (L51, L52) from the high-pressure region 560 to the waist opening 500a is at least related to the pair of locking portions 524 (the left-right direction of the belt portion Both end portions) are preferably established at the center of the pair of locking portions 524 (the center portion of the belt portion in the left-right direction). Ideally, it is preferable that both ends of the length from the pair of locking portions 524 to 1/3 of the length between the pair of locking portions 524 are established in the center portion therebetween.

Furthermore, it is preferable that the shrinkage rate of the high-pressure region 560 is higher than that of the low-pressure region 550. The shrinkage rate means that the length of the high-pressure region 560 and the low-pressure region 550 in the left-right direction is extended to the left-right direction to a, and the left-right direction of the natural state of the high-pressure region 560 and the low-pressure region 550 is the left-right direction. When the length is set to b, the value calculated by the calculation formula "(ab)/a×100(%)". As a result, when the high-pressure area 560 is colored, the color of the high-pressure area 560 becomes relatively dark in the natural state of the paper diaper 500. Therefore, the high-pressure area 560 becomes easy for the user to recognize.

In addition, it is preferable to make the light transmittance of the sheet other than the sheet colored in the high-pressure region 560 (here, the stretchable film 565) higher (for example, 50% or more is preferable). In addition, it is preferable to reduce the amount of white pigment (for example, titanium oxide, etc.) contained in the flakes other than the colored flakes (for example, to make it less than 10%). As a result, the non-skin side and the skin side of the front belt portion 521 and the rear belt portion 522 can be easily seen through the colored sheet, and the high-pressure area 560 becomes easily recognized by the user.

Next, the shapes of the first to fourth high pressure regions 561 to 564 will be specifically explained. As shown in FIG. 19, the first high-pressure region 561 included in the front belt portion 521 is continuously arranged in the left-right direction across the pair of locking portions 524, and the central portion of the first high-pressure region 561 in the left-right direction is Compared to both ends, it is located on the lower side. In detail, the first high-pressure region 561 is gradually inclined downward from both end portions in the left-right direction toward the center portion.

Therefore, the first high-pressure region 561 can prevent the wearer's abdomen from being excessively tightened. In addition, since the low-pressure region 550 can be properly adhered to the abdomen of the wearer, the wearing comfort of the paper diaper 500 can be improved. In addition, at both ends of the first high-pressure region 561 in the left-right direction, the wearer's anterior superior spine can be fastened, and the positional displacement of the paper diaper 500 during wearing can be suppressed.

Also, the second high-pressure region 562 included in the front-side belt portion 521 is continuously arranged in the left-right direction across the pair of locking portions 524, and both end portions in the left-right direction of the second high-pressure region 561 are located closer to the The first high-pressure region 561 is further down, and at least a part of the central portion of the second high-pressure region 562 in the left-right direction overlaps the first high-pressure region 561.

That is, the center portion of the second high-pressure region 562 in the left-right direction is located lower than the first high-pressure region 561. Therefore, the second high-pressure region 562 can prevent the wearer's abdomen from being excessively tightened. In addition, at both ends of the second high-pressure region 562 in the left-right direction, the wearer's anterior superior iliac spine can be fastened to be supported from below, and the positional deviation of the paper diaper 500 during wearing can be suppressed.

In addition, as shown in FIG. 20, the third high-pressure region 563 included in the rear belt portion 522 is continuously arranged in the left-right direction across the pair of locking portions 524. The central part is located on the upper side than the two ends. In detail, the third high-pressure region 563 is gradually inclined upward from both end portions in the left-right direction toward the center portion.

Therefore, the third high-pressure area 563 can prevent excessive tightening of the central portion of the buttocks where the wearer's movement is large. In addition, since the low-pressure region 550 can be properly adhered to the center of the wearer's buttocks, the wearing comfort of the paper diaper 500 can be improved. In addition, if the high-pressure region 560 is located at the center of the buttocks, the position of the high-pressure region 560 may shift due to the movement of the center of the buttocks, bulging, etc. As a result, the position of the paper diaper 500 may shift. On the other hand, the third high-pressure region 563 is arranged so as to partially surround the center of the buttocks from the upper side, so that it is less likely to be displaced. In addition, similar to the second high-pressure region 562, at both end portions in the left-right direction of the third high-pressure region 563, the wearer's anterior superior spine can be tightened to be supported from below, and wear time can be suppressed The position of the paper diaper 500 is shifted.

In addition, the fourth high-pressure region 564 included in the rear belt portion 522 is also continuously arranged in the left-right direction across the pair of locking portions 524, and both end portions of the fourth high-pressure region 564 in the left-right direction are located relatively The third high pressure region 563 is further above, and at least a part of the central portion of the fourth high pressure region 564 in the left-right direction overlaps the third high pressure region 563.

That is, the center portion of the fourth high-pressure region 564 in the left-right direction is located on the upper side as in the third high-pressure region 563. Therefore, the fourth high pressure area 564 can prevent the wearer's buttocks from being excessively tightened. In addition, since the left and right ends of the fourth high-pressure region 564 are located on the upper side, similarly to the first high-pressure region 561, the wearer can be tightened near the anterior superior spine of the iliac bone, which can be suppressed The position of the paper diaper 500 at the time of wearing is shifted.

Furthermore, regarding the positional relationship between the first to fourth high-pressure regions 561 to 564, at least the pair of locking portions 524 (both ends in the left-right direction of the high-pressure region) are at the center of the pair of locking portions 524 (high The central part of the pressure area in the left-right direction is preferably established. Ideally, it is preferable that both ends of the length from the pair of locking portions 524 to 1/3 of the length between the pair of locking portions 524 are established in the center portion therebetween.

That is, in the locking portion 524, it is preferable that the positions of part or all of the first high pressure region 561 and the fourth high pressure region 564 match up and down. Similarly, in the locking portion 524, it is preferable that the positions of part or all of the second high-pressure region 562 and the third high-pressure region 563 in the vertical direction coincide. Thereby, a ring-shaped high-pressure region 560 is formed. Therefore, the paper diaper 500 is placed close to the waist of the wearer, and the positional displacement of the paper diaper 500 can be suppressed.

In addition, at the center of the front belt portion 521 and the rear belt portion 522 in the left-right direction, the lower end of the fourth high-pressure region 564 is disposed above the lower end of the first high-pressure region 561, and the lower end of the third high-pressure region 563 It is arranged above the lower end of the second high-pressure region 562. By this, the lower abdomen can be tightened diagonally upward, and the intra-abdominal pressure can be increased. Therefore, the effect of assisting the muscles (abdominal muscles, etc.) around the bone plate can stabilize the bone plate.

In addition, at the rear side belt portion 522, both end portions in the left-right direction are longer than the central portion 3 from the upper end of the fourth high-pressure region 564 to the lower end of the third rear high-pressure region 563 in the up-down direction. And the lower end of the third rear high-pressure region 563 is located below. In detail, the lower end of the third high-pressure region 563 gradually slopes downward from the central portion in the left-right direction of the rear belt portion 522 toward both ends. That is, the third and fourth high-pressure regions 563 and 564 are arranged to fit the shape of the gluteus medius muscle. Therefore, when the paper diaper 500 is worn, the third and fourth high pressure regions 563 and 564 can fasten the wearer's gluteus medius muscles, and can assist the movement of the gluteus medius muscles. As a result, the pelvis can be stabilized during walking or other movements, and the wearer's movements (walking) can be supported.

In addition, in the paper diaper 500 of the present embodiment, as described above, the high-pressure area 560 adapted to the body shape of the wearer can be distinguished from the low-pressure area 550 in a different color and can be recognized. Therefore, the user can easily move and the wearing comfort is good, and the paper diaper 500 can be worn at a position where the wearer is less likely to be displaced. Therefore, the effect by the high pressure region 560 can be more surely obtained.

However, the high-pressure region 560 shown in FIGS. 19 and 20 is only an example, and the number, shape, and arrangement of the high-pressure region 560 are not particularly limited. For example, the paper diaper 500 may have any one or a plurality of the first to fourth high pressure regions 561 to 564. In addition, only one of the front belt portion 521 and the rear belt portion 522 may have the high pressure region 560, and the other may not have the high pressure region 560.

The embodiment of the present invention has been described above, but the aforementioned embodiment is an embodiment for easy understanding of the present invention and is not intended to limit the present invention. In addition, the present invention can be modified, improved, etc. without exceeding the scope of the technical idea, and of course the present invention also includes equivalents thereof.

1‧‧‧Disposable disposable diapers 10‧‧‧absorbent body 11‧‧‧absorbent core material 12‧‧‧Top slice 13‧‧‧back sheet 14‧‧‧ Three-dimensional wrinkle 20‧‧‧External body 21‧‧‧Abdomen-side exterior body (front belt part) 21s‧‧‧Basic area 22‧‧‧Back side exterior body (rear belt part) 213, 223‧‧‧Skin side sheet (skin side non-woven fabric) 214, 224‧‧‧ Non-skin side sheet (non-skin side non-woven fabric) 215、225‧‧‧Stretchable non-woven fabric (stretchable member) 23‧‧‧Crotch outer body 24‧‧‧End joint area 26‧‧‧Waist elastic member 26s‧‧‧Telescopic area 27‧‧‧foot elastic 30‧‧‧Stretchable film 30s‧‧‧High pressure area 31s‧‧‧1st high pressure area 32s‧‧‧2nd high pressure area 33s‧‧‧Low pressure area 34‧‧‧Ventilation Department 40‧‧‧welding department 50‧‧‧Opening (Ventilation Department) 300‧‧‧diaper (diaper-type disposable diapers) 310‧‧‧absorbent body 311‧‧‧absorbent core material 312‧‧‧Top slice 313‧‧‧back sheet 320‧‧‧External body 321‧‧‧Front belt 322‧‧‧ Rear belt 3213, 3223‧‧‧Skin side sheet 3214, 3224‧‧‧non-skin side sheet 3215, 3225‧‧‧Elastic non-woven fabric (front elastic member) 323‧‧‧ Crotch 324‧‧‧Locking part 326‧‧‧rubber thread for waist 327‧‧‧Rubber thread for foot circumference 330‧‧‧ Low pressure area 331‧‧‧Low pressure area on the rear side (low pressure area) 332‧‧‧Low pressure area on the front side 340‧‧‧High pressure area 341‧‧‧High pressure area on the rear side (high pressure area) 342‧‧‧High pressure area on the front 343‧‧‧Stretchable film (rear stretchable member, front stretchable member) 350‧‧‧Joint 360‧‧‧ gluteal muscle 361‧‧‧ gluteus maximus 500‧‧‧diaper (diaper-type disposable diapers) 500a‧‧‧ Waist opening 500b‧‧‧Foot opening 510‧‧‧absorbent body 511‧‧‧absorbent core material 512‧‧‧Top slice 513‧‧‧back sheet 520‧‧‧External body 521‧‧‧Belt part (belt part) 522‧‧‧Belt section (belt section) 5213, 5223‧‧‧ Skin side sheet 5214, 5224‧‧‧non-skin side sheet 5215, 5225‧‧‧Elastic non-woven fabric 523‧‧‧ Crotch 524‧‧‧Locking part 527‧‧‧Rubber thread for foot circumference 530‧‧‧Joint 540‧‧‧ Waist stretch area (telescopic area) 541‧‧‧rubber thread 550‧‧‧Low pressure area 560‧‧‧High pressure area 561‧‧‧The first high pressure area 562‧‧‧2nd high pressure area 563‧‧‧The third high pressure area 564‧‧‧4th high pressure area 565‧‧‧Stretchable film (stretchable member) 566‧‧‧Color Department 567‧‧‧Non-color department 211, 212‧‧‧ crotch side area 221, 222‧‧‧ waist area A2‧‧‧Side side A1‧‧‧Central Department

Fig. 1 is a schematic perspective view of a pant-type disposable diaper 1 after use. Fig. 2 is a schematic plan view of the paper diaper 1 in an unfolded and extended state. FIG. 3 is a schematic cross-sectional view taken along line I-I of FIG. 2. 4A to 4C are conceptual diagrams showing a state where the paper diaper 1 is worn. 5A to 5B are schematic cross-sectional views of the abdomen-side exterior body 21 and the back-side exterior body 22. FIG. 6A is an explanatory diagram of the high-pressure region 30s, and FIG. 6B is an explanatory diagram of the vent portion 33 and the welding portion 40. 7A to 7C are explanatory views of the high-pressure region 30s in a modification example. FIG. 8 is a schematic perspective view of a disposable diaper 300 for shorts. 9 is a schematic plan view of the paper diaper 300 in an unfolded and extended state. Fig. 10 is a schematic cross-sectional view taken along the line I-I in Fig. 9. FIG. 11A is a diagram showing an example of the joint portion 350, and FIG. 11B is a schematic cross-sectional view of the front belt portion 321 and the rear belt portion 322. 12 is a schematic plan view of the rear belt portion 322. 13 is a schematic plan view of the front belt portion 321. 14A and 14B are explanatory diagrams of the gluteus medius 60. Fig. 15 is a schematic perspective view of a disposable diaper 500 of shorts type. Fig. 16 is a schematic plan view of the paper diaper 500 in an unfolded and extended state. Fig. 17 is a schematic cross-sectional view taken along the line I-I in Fig. 16. 18A is a diagram of an example of a joint portion 530 of the front belt portion 521 and the rear belt portion 522, and FIG. 18B is a schematic cross-sectional view of the front belt portion 521 and the rear belt portion 522. FIG. Fig. 19 is a schematic plan view of the front belt portion 521. Fig. 20 is a schematic plan view of the rear belt portion 522. FIG. 21 is a graph showing test results regarding the identification of the high-pressure region 560. FIG. 22 is an explanatory view of the bonding portion 530 formed on the stretchable film 565. FIG.

1‧‧‧Disposable disposable diapers

10‧‧‧absorbent body

11‧‧‧absorbent core material

21‧‧‧Abdomen-side exterior body (front belt part)

21s‧‧‧Basic area

22‧‧‧Back side exterior body (rear belt part)

211, 212‧‧‧ crotch side area

221, 222‧‧‧ waist area

23‧‧‧Crotch outer body

24‧‧‧End joint area

26‧‧‧Waist elastic member

26s‧‧‧Telescopic area

27‧‧‧foot elastic

30‧‧‧Stretchable film

30s‧‧‧High pressure area

31s‧‧‧1st high pressure area

32s‧‧‧2nd high pressure area

33s‧‧‧Low pressure area

34‧‧‧Ventilation Department

A2‧‧‧Side side

A1‧‧‧Central Department

Claims (39)

A shorts-type disposable paper diaper with up and down directions, left and right directions, and front and back directions crossing each other, and having: Front belt part, rear belt part and absorbent body with absorbent core, The front side belt part and the rear side belt part form a shorts-type disposable disposable diaper with a waist opening formed at the upper end, which is characterized by: The front belt part and the rear belt part have: The nonwoven fabric on the skin side closest to the skin side, the nonwoven fabric on the non-skin side closest to the non-skin side, and the stretchable member that stretches in the left-right direction, It also includes: a telescopic area along the edge of the waist opening; A base area of the telescopic area adjacent to the center of the front-side belt portion in the left-right direction from below; and The high pressure area located below the aforementioned telescoping area, The force for extending the high-pressure area per unit width by the unit length in the left-right direction is greater than the force for extending the unit area in the unit width by the unit length in the left-right direction. The aforementioned high pressure area system It is provided in a circular shape throughout the front belt portion and the rear belt portion, There is a stretchable film between the non-skin on the skin side and the non-skin on the non-skin side, and It has a ventilation part that is better than the part where the aforementioned stretchable film exists, At least one of the front belt portion and the rear belt portion does not overlap with the absorbent core in the front-rear direction. For example, the short-sleeved disposable diaper of the first patent application, in which The aforementioned stretchable member is a sheet-like member having air permeability. For example, the short-sleeved disposable diaper of the second patent application, in which The aforementioned stretchable member is stretchable nonwoven fabric, The stretchable nonwoven fabric is disposed between the skin-side nonwoven fabric and the aforementioned non-skin-side nonwoven fabric, and is arranged closer to the skin than the stretchable film. For example, the short-sleeved disposable diaper of the second or third patent application, where, The aforementioned stretchable member is stretchable nonwoven fabric, In the expansion and contraction area, a plurality of linear elastic materials that expand and contract in the left-right direction are arranged at intervals in the vertical direction, The length in the vertical direction from the upper end of the high-pressure region to the upper end of the front-side belt portion in the center of the left-right direction of the front-side belt portion is longer than the length in the vertical direction of the high-pressure region. For example, the shorts type disposable paper diaper according to any one of the items 1 to 4 of the patent application scope, wherein, In the high-pressure region, the plural stretchable films long in the left-right direction are arranged at intervals in the up-down direction, A portion arranged between the stretchable films in the up-down direction is the vent portion. For example, the short-sleeved disposable diaper of item 5 of the patent scope, in which In the high-pressure region, the area of the portion where the stretchable film exists is larger than the area of the vent portion arranged between the stretchable films in the up-down direction. For example, the short-sleeved disposable diapers of the patent application items 5 or 6, wherein, In the left-right side portions of the front belt portion and the rear belt portion, the area of the vent portion divided by the area of the high-pressure region is larger than the center portion in the left-right direction. For example, the short-sleeved disposable diaper according to any one of patent application items 5 to 7, wherein, The stretchable film system does not have openings penetrating the stretchable film. For example, the shorts-type disposable paper diaper according to any one of the items 1 to 7 of the patent scope, wherein, The stretchable film has an opening through the stretchable film, The opening is the vent. For example, the shorts type disposable paper diaper according to any one of the items 1 to 9 of the patent application scope, wherein, The nonwoven fabric on the skin side, the nonwoven fabric on the non-skin side, the stretchable member and the stretchable film are welded in the front-rear direction by the same welding pattern. For example, the short-sleeved disposable diaper of the patent application item 10, in which The aforementioned welding pattern is a pattern in which a plurality of welding parts are scattered, In the state where the disposable paper diaper for shorts is extended, the area of the vent portion is larger than the area of the welded portion located in the high pressure area. A pant-type disposable disposable diaper with up and down directions, left and right directions and front and back directions crossing each other, and The two sides of the front side belt part in the left-right direction and the two sides of the left side belt part in the left-right direction are pant-type disposable disposable diapers that are locked by a pair of locking parts, and are characterized by: The aforementioned rear belt portion has a low pressure area and a high pressure area, The low-pressure area and the high-pressure area are stretchable in the left-right direction, The force for extending the high-pressure area of the unit width in the up-down direction toward the left-right direction is greater than the force for extending the unit-length of the low pressure area in the left-right direction by the unit length, The high-pressure area is continuously arranged in the left-right direction across the pair of locking portions, Both ends of the high-pressure area in the left-right direction are longer than the central portion, the length of the high-pressure area in the up-down direction is longer, and the lower end of the high-pressure area is located below, In the central portion of the rear belt portion in the left-right direction, the low-pressure region is disposed adjacent to the lower-pressure region. For example, the short-sleeved disposable diaper in the 12th range of patent application, in which The lower end of the high-pressure region slopes downward from the central portion in the left-right direction of the high-pressure region toward both ends. For example, the short-sleeved disposable diaper of the patent application item 12 or 13, wherein, With absorbent core material, The high-pressure region is arranged in the front-rear direction so as not to overlap with the rear side portion of the absorbent core, The low-pressure region is arranged at least between the lower end of the high-pressure region and the upper end of the rear side portion of the absorbent core. For example, the shorts type disposable paper diaper according to any one of the patent application items 12 to 14, wherein, The front belt portion has a front-side stretchable member that expands and contracts in the left-right direction, The front-side elastic member is continuously arranged in the left-right direction across the pair of locking portions, The high-pressure region is attached to the locking portion and connected to the front-side elastic member. For example, the short-sleeved disposable diaper of item 15 of the patent scope, in which The front belt portion has: a front low-pressure region having elasticity in the left-right direction; and a front high-pressure region having the front elasticity member, The force for extending the front high-pressure region of unit width in the up-down direction to the unit length in the left-right direction is greater than the force for extending the unit-length of the low pressure region in the unit direction in the left-right direction by the unit length , The high-pressure region is connected to the front high-pressure region at the locking portion. For example, the short-sleeved disposable diaper in the scope of patent application item 16, where, The high-pressure region has a plurality of the front-side elastic members at intervals in the vertical direction, The high-pressure area has a plurality of rear-side stretchable members that stretch in the left-right direction at intervals in the up-down direction, In the locking portion, the uppermost front elastic member and the uppermost elastic member are connected, and the lowermost front elastic member and the lowermost rear elastic member are connected. For example, the short-sleeved disposable diaper of the patent application item 16 or 17, wherein, Both ends of the front high-pressure region in the left-right direction are longer than the central portion in the vertical direction, and the upper end of the front high-pressure region is located above. For example, the 18th short-sleeved disposable diaper of patent application scope, in which In the central portion of the front belt portion in the left-right direction, the front low-pressure region is disposed adjacent to the front high-pressure region. For example, the short-sleeved disposable diaper according to any one of patent application items 16 to 19, wherein, With absorbent core material, The front high-pressure region is arranged in the front-rear direction so as not to overlap the front side portion of the absorbent core. For example, the short-sleeved disposable diaper according to any one of the patent application items 12 to 20, wherein, The high-pressure area has a plurality of rear-side stretchable members that stretch in the left-right direction at intervals in the up-down direction, Both ends of the high-pressure region in the left-right direction are wider than the central portion in the interval between the rear-side elastic members adjacent in the up-down direction. For example, the short-sleeved disposable diaper according to any one of the patent application items 12 to 21, in which The high-pressure area has a back and forth elastic member that expands and contracts in the left-right direction The aforementioned back-side stretchable member is a sheet-like member. For example, the short-sleeved disposable diaper of item 22 of the patent scope, in which In the aforementioned high-pressure area, a stretchable nonwoven fabric and a stretchable film are arranged between the skin-side sheet and the non-skin-side sheet, In the low-pressure region, the stretchable nonwoven fabric is arranged between the skin-side sheet and the aforementioned non-skin-side sheet. For example, the shorts type disposable disposable diaper according to any one of the patent application items 12 to 23, in which Stretchable members are arranged along the pair of foot openings. A shorts-type disposable paper diaper with up and down directions, left and right directions, and front and back directions crossing each other, and having: The shorts-type disposable paper diapers with belt part and absorbent body are characterized by: The aforementioned belt portion is below the telescopic area along the edge of the waist opening, and has a low pressure area and a high pressure area, The low-pressure area and the high-pressure area are adjacent to each other and have stretchability in the left-right direction, The force for extending the high-pressure area of the unit width in the up-down direction toward the left-right direction is greater than the force for extending the unit-length of the low pressure area in the left-right direction by the unit length, When the belt portion is viewed from at least one of the non-skin side and the skin side, at least a part of the high-pressure region is a different color from the low-pressure region. For example, the short-sleeved disposable diaper of the 25th scope of the patent application, in which When the belt portion is viewed from at least one of the non-skin side and the skin side, the outline portion of the high-pressure area in the up-down direction is a different color from the low-pressure area. For example, the short-sleeved disposable diaper of the patent application item 25 or 26, in which Viewing the belt portion from at least one of the skin side and the non-skin side, When the difference between the a* value of the L*a*b color system is Δa* and the difference between the b* value is Δb* in the high pressure region and the low pressure region, when the difference ΔE* is calculated by the following calculation formula , ΔE*={(Δa*)2＋(Δb*)2}1/2 The aforementioned color difference ΔE* is 1.45 or more. For example, the short-sleeved disposable diaper in the 27th range of patent application, in which Looking at the belt part from the non-skin side, The aforementioned color difference ΔE* is 1.45 or more. For example, the short-sleeved disposable diaper according to any one of patent application items 25 to 28, in which The high-pressure area has an elastic member that expands and contracts in the left-right direction, The elastic member is colored differently from the low-pressure region. For example, the short-sleeved disposable diaper in the scope of patent application item 29, in which In the high-pressure area, a plurality of materials are stacked in the thickness direction of the belt portion, The stretchable member is arranged close to the non-skin side. For example, short-sleeved disposable diapers in the scope of patent application items 29 or 30, where, The aforementioned stretchable member is a sheet-like stretchable member. For example, the short-sleeved disposable diaper according to any one of patent application items 29 to 31, in which In the high-pressure region, the plurality of elastic members are plural, and are arranged at intervals in the vertical direction. For example, the short-sleeved disposable diaper according to any one of patent application items 29 to 32, in which The stretchable member is intermittently joined to the sheet disposed closer to the non-skin side than the stretchable member by a plurality of joining portions, The distance between the joining portions adjacent in the up-down direction is smaller than the length of the stretchable member in the up-down direction, and adjacent in the left-right direction compared to the length of the stretchable member in the left-right direction The interval between the aforementioned joints is small. For example, the short-sleeved disposable diaper according to any one of patent application items 25 to 33, in which The high-pressure area has a different-color portion having a different color from the low-pressure area; and a non-different-color portion other than the different-color portion, The central portion of the belt portion in the left-right direction has a higher proportion of the different-colored portion per unit area than the end portion. For example, the shorts type disposable paper diaper according to any one of the patent application items 25 to 34, wherein, The aforementioned belt portion has a front belt portion and a rear belt portion, The length in the up-down direction from the upper end of the high-pressure region located at the center portion in the left-right direction of the front belt portion to the waist opening is related to the length from the center portion in the left-right direction at the rear belt portion. The length from the upper end of the high-pressure region to the opening of the waist circumference in the vertical direction is different. For example, the short-sleeved disposable diaper according to any one of the patent application items 25 to 35, in which The aforementioned belt portion has a front belt portion and a rear belt portion, The two side portions of the front belt portion in the left-right direction and the two side portions of the rear belt portion in the left-right direction are locked by a pair of locking portions, The high-pressure area is located in the front belt portion, and has a first high-pressure area, The first high-pressure region is continuously arranged in the left-right direction across the pair of locking portions, The center part in the left-right direction of the first high-pressure region is located lower than both end parts. For example, the short-sleeved disposable diaper of item 36 of the patent scope, in which The high-pressure area is located in the front belt portion, and has a second high-pressure area, The second high-pressure region is continuously arranged in the left-right direction across the pair of locking portions, Both ends of the second high-pressure region in the left-right direction are located below the first high-pressure region, At least a part of the central portion in the left-right direction of the second high-pressure region overlaps the first high-pressure region. For example, the short-sleeved disposable diaper according to any one of patent application items 25 to 37, in which The aforementioned belt portion has a front belt portion and a rear belt portion, The two side portions of the front belt portion in the left-right direction and the two side portions of the rear belt portion in the left-right direction are locked by a pair of locking portions, The high-pressure area is located in the rear belt portion, and has a third high-pressure area, The third high-pressure region is continuously arranged in the left-right direction across the pair of locking portions, The center part in the left-right direction of the third high-pressure region is located above the both end parts. For example, the short-sleeved disposable diaper in the scope of patent application item 38, where, The high-pressure area is located in the rear belt portion, and has a fourth high-pressure area, The fourth high-pressure area is continuously arranged in the left-right direction across the pair of locking portions, Both ends of the fourth high-pressure region in the left-right direction are located above the third high-pressure region, At least a part of the central portion in the left-right direction of the fourth high-pressure region overlaps the third high-pressure region.

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