CN111565686A - Pants-type absorbent article - Google Patents
Pants-type absorbent article Download PDFInfo
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- CN111565686A CN111565686A CN201880084010.4A CN201880084010A CN111565686A CN 111565686 A CN111565686 A CN 111565686A CN 201880084010 A CN201880084010 A CN 201880084010A CN 111565686 A CN111565686 A CN 111565686A
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- edge portion
- waist
- right direction
- waist portion
- force
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
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- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
A pants-type absorbent article (1) is provided with: an absorbent main body (10); a front waist section (20) having a stretchable sheet (24) and a front elastic member (23); a rear waist part (30) having a rear elastic member (33). The front waist portion (20) has a front edge portion (Lf), and the rear waist portion (30) has a rear edge portion (Lb). The stretching force acting on the front side edge portion (Lf) in the left-right direction when the length of the front side waist portion (20) is stretched to 85% of the maximum stretching length thereof in the left-right direction is larger than the stretching force acting on the rear side edge portion (Lf) in the left-right direction when the length of the rear side waist portion (30) is stretched to 85% of the maximum stretching length thereof. The left-right direction contraction force acting on the front side edge portion (Lf) when the length of the front side waist portion (20) is contracted to 55% of the maximum stretched length thereof is smaller than the left-right direction contraction force acting on the rear side edge portion (Lf) when the length of the rear side waist portion (30) is contracted to 55% of the maximum stretched length.
Description
Technical Field
The present invention relates to a pants-type absorbent article.
Background
Pants-type disposable diapers are known as examples of pants-type absorbent articles. Patent document 1 discloses a pants-type disposable diaper in which an absorbent body is disposed across between a front body outer cover and a back body outer cover, and both widthwise side edges of the front body outer cover and the back body outer cover are joined to each other to form a waist opening. In the front-body exterior assembly and the back-body exterior assembly, the waist elastic member is fixed in an extended state between the inner sheet and the outer sheet (non-stretchable sheet).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2013 and 138795.
Disclosure of Invention
Problems to be solved by the invention
When putting on a pant-type disposable diaper to a wearer (e.g., an infant), the waist-opening is typically pulled open, the legs of the wearer are passed through the waist-opening and then through the leg-openings, and the diaper is then pulled up toward the crotch of the wearer. However, if the waist elastic member is provided in the front-body exterior member and the back-body exterior member under the same conditions, the same force acts on the waist front side (ventral side) and the waist back side (dorsal side), and therefore the back-body exterior member is likely to be caught on the protruding buttocks of the wearer (infant) when the diaper is pulled up. Also, in consideration of the bulging of the abdomen of the infant, the abdomen side contracts more than the back side after the diaper is put on, and there is a risk that the abdomen of the wearer leaves a mark of gather and causes discomfort.
The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a pants-type absorbent article which can be easily put on a wearer such as an infant and the like and can suppress a sense of incongruity when putting on the absorbent article.
Means for solving the problems
A main aspect of the present invention for achieving the above object is a pants-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction intersecting each other, the pants-type absorbent article comprising: an absorbent main body; a front waist section including a stretchable sheet and a front elastic member both stretchable in the left-right direction; and a rear waist portion including a rear elastic member stretchable in the left-right direction, the front waist portion having a front edge portion which is an area sandwiched in the up-down direction between an upper end of the front waist portion and a lower end of the stretchable sheet, the rear waist portion having a rear edge portion which is equal in length in the up-down direction from an upper end of the rear waist portion to a length in the up-down direction of the front edge portion, a left-right direction stretching force in the front edge portion when the front waist portion is stretched in the left-right direction to 85% of a maximum stretching length of the front waist portion being larger than a left-right direction stretching force in the rear edge portion when the rear waist portion is stretched in the left-right direction to 85% of the maximum stretching length of the rear waist portion, and a left-right direction stretching force in the rear edge portion when the front waist portion is contracted in the left-right direction to the maximum stretching length of the front waist portion A left-right direction contraction force in the front side edge portion at 55% of the length is smaller than a left-right direction contraction force in the rear side edge portion when the rear side waist portion contracts in the left-right direction to 55% of a maximum stretched length of the rear side waist portion.
Other features of the present invention will become apparent from the description of the specification and the drawings.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide a pants-type absorbent article that can be easily put on a wearer such as an infant and the like and can suppress a sense of incongruity when putting on the absorbent article.
Drawings
Fig. 1 is a perspective view of a pants-type disposable diaper 1 (hereinafter, referred to as "diaper").
Fig. 2 is a plan view of the diaper 1 in an unfolded and extended state.
Fig. 3 is a sectional view taken along line II in fig. 2.
Fig. 4 is a diagram showing an example of the action when the diaper 1 is worn.
Fig. 5 is a side view of the diaper 1 in a state where the diaper 1 is worn by a wearer such as an infant or the like.
Fig. 6 is a diagram showing a change in the tensile force in the front side edge portion Lf and the rear side edge portion Lb when the edge portions are pulled in the left-right direction in the operation of opening the waistline opening BH of the diaper 1.
Fig. 7 is a view showing changes in contraction force at the side edge portions Lf and Lb when the front side edge portions Lf and the rear side edge portions Lb contract in the left-right direction in an operation of fitting the waistline opening BH of the diaper 1 to the waistline of the wearer.
Detailed Description
At least the following matters will become clear from the description of the present specification and the accompanying drawings.
A pant-type absorbent article having a vertical direction, a horizontal direction, and a front-rear direction intersecting each other, comprising: an absorbent main body; a front waist section including a stretchable sheet and a front elastic member both stretchable in the left-right direction; and a rear waist portion including a rear elastic member stretchable in the left-right direction, the front waist portion having a front edge portion which is a region sandwiched between an upper end of the front waist portion and a lower end of the stretchable sheet in the up-down direction, the rear waist portion having a rear edge portion whose length in the up-down direction from an upper end of the rear waist portion is equal to a length in the up-down direction of the front edge portion, a left-right direction stretching force in the front edge portion being larger than a left-right direction stretching force in the rear edge portion when the rear waist portion is stretched in the left-right direction to 85% of a maximum stretching length of the front waist portion, and when the front waist portion contracts in the left-right direction to 55% of the maximum stretched length of the front waist portion, a left-right direction contraction force in the front edge portion is smaller than a left-right direction contraction force of the rear edge portion when the rear waist portion contracts in the left-right direction to 55% of the maximum stretched length of the rear waist portion.
According to the pants-type absorbent article, when the diaper is put on, the upper end portion (rear side edge portion) of the rear waist portion on the hip portion side can be easily stretched, and therefore, the upper end portion is less likely to be caught on the hip portion of the wearer. Further, after the diaper is put on, the upper end portion (front side edge portion) of the front waist portion on the abdomen side can be easily stretched, and therefore, the abdomen of the wearer can be prevented from being excessively compressed. Therefore, the pants-type absorbent article can be realized as follows: the wearer is easy to put on and is less likely to cause discomfort when wearing the absorbent article.
In such a pants-type absorbent article, it is desirable that when the front side waist portion is stretched in the left-right direction to a length equal to a predetermined ratio in a range of 90% to 65% of the maximum stretched length of the front side waist portion, the left-right direction stretching force in the front side edge portion is larger than the left-right direction stretching force in the rear side edge portion when the rear side waist portion is stretched in the left-right direction to a length equal to the predetermined ratio in a range of 90% to 65% of the maximum stretched length of the rear side waist portion.
According to the pants-type absorbent article, when the waist portion is stretched in the left-right direction during actual putting on the diaper, the rear side edge portion can be easily stretched at any stretch ratio within an expected range of 90% to 65%. Therefore, the rear waist portion is less likely to be caught on the wearer's buttocks, and the diaper is easily put on.
In such a pants-type absorbent article, it is desirable that the difference between the left-right direction stretching force in the front side edge portion and the left-right direction stretching force in the rear side edge portion is larger as the ratio of the length of each of the front side waist portion and the rear side waist portion to the maximum stretching length of each of the front side waist portion and the rear side waist portion in the left-right direction is larger.
According to the pants-type absorbent article, the more the front edge portion and the rear edge portion are stretched in the left-right direction, the more easily the rear edge portion is stretched with respect to the front edge portion. Therefore, the upper end portion of the rear waist portion is less likely to be caught on the hip portion of the wearer during the diaper wearing operation.
In such a pants-type absorbent article, it is desirable that, when the front side waist portion is contracted in the left-right direction to a length equal to a predetermined ratio in the range of 60% to 45% of the maximum stretched length of the front side waist portion, the left-right direction contraction force in the front side edge portion is smaller than the left-right direction contraction force in the rear side edge portion when the rear side waist portion is contracted in the left-right direction to a length equal to the predetermined ratio in the range of 60% to 45% of the maximum stretched length of the rear side waist portion.
According to the pants-type absorbent article, when the waist portion is contracted in the left-right direction after the diaper is actually put on the wearer, the front side edge portion can be easily stretched at any stretch ratio within a desired range of 65% to 45%. Therefore, the strangulation of the front waist portion against the abdomen of the wearer is suppressed, and the wearer is less likely to feel discomfort.
In such a pants-type absorbent article, it is desirable that the difference between the lateral contraction force in the front edge portion and the lateral contraction force in the rear edge portion is larger as the ratio of the length of each of the front waist portion and the rear waist portion to the maximum stretched length of each of the front waist portion and the rear waist portion in the lateral direction is smaller.
According to the pants-type absorbent article, the higher the lateral contraction force of the front edge portion and the rear edge portion, the more easily the front edge portion is stretched with respect to the rear edge portion. Therefore, after the diaper 1 is put on, the upper end portion of the front waist portion can be further suppressed from being excessively pressed against the abdomen of the wearer.
In such a pants-type absorbent article, it is desirable that the rear waist portion has a rear intermediate portion which is a region located below the rear side edge portion in the up-down direction and in which the rear elastic member is arranged, and that a right-left direction tensile force in the rear intermediate portion is larger than a right-left direction tensile force in the rear side edge portion when the rear waist portion is stretched in the right-left direction to 85% of a maximum stretched length of the rear waist portion.
According to the pants-type absorbent article, the rear side edge portion positioned above the rear side intermediate portion can be easily stretched in the left-right direction. Therefore, in the operation of opening the waist opening of the diaper, the upper end portion of the rear waist portion is more easily opened, and the diaper can be smoothly put on.
In such a pants-type absorbent article, it is desirable that the front waist portion has a front intermediate portion which is a region located below the front side edge portion in the up-down direction and in which the front elastic member is arranged, and that a left-right direction tensile force in the front intermediate portion is larger than a left-right direction tensile force in the front side edge portion when the front waist portion is stretched in the left-right direction to 85% of a maximum stretched length of the front waist portion.
According to the pants-type absorbent article, the front side edge portion positioned above the front side intermediate portion can be easily stretched in the left-right direction. Therefore, in the operation of opening the waist opening of the diaper, the upper end portion of the front waist portion can be more easily opened, and the diaper can be smoothly put on.
In such a pants-type absorbent article, it is desirable that when the front waist portion is stretched in the left-right direction to 85% of the maximum stretched length of the front waist portion, the left-right direction stretching force in the front intermediate portion is smaller than the left-right direction stretching force in the rear intermediate portion when the rear waist portion is stretched in the left-right direction to 85% of the maximum stretched length of the rear waist portion.
According to the pants-type absorbent article, in the rear intermediate portion in which all the rear elastic members are discontinuous in the lateral direction, the tensile force in the rear intermediate portion tends to be weaker than that in the front intermediate portion in which only a part of the front elastic members are discontinuous in the lateral direction. In view of this, since the tensile force is set higher in the rear intermediate portion than in the front intermediate portion, sufficient stretchability is achieved in the rear intermediate portion, and poor adhesion can be suppressed.
In such a pants-type absorbent article, it is desirable that when the front waist portion and the rear waist portion are stretched in the left-right direction to 85% of the maximum stretched length of the front waist portion and the rear waist portion, respectively, the left-right direction stretching force in the rear intermediate portion is larger than the left-right direction stretching force in the front intermediate portion, the left-right direction stretching force in the front intermediate portion is larger than the left-right direction stretching force in the front edge portion, and the left-right direction stretching force in the front edge portion is larger than the left-right direction stretching force in the rear edge portion.
According to the pants-type absorbent article, the difference in tensile force between the rear side edge portion and the rear side intermediate portion is larger than the difference in tensile force between the front side edge portion and the front side intermediate portion. Therefore, when the diaper is worn, the rear side edge portion is more easily stretched, and the rear side edge portion can be further suppressed from catching on the hips of the wearer.
In such a pants-type absorbent article, it is desirable that the front waist portion has a front intermediate portion that is a region located below the front side edge portion in the up-down direction and in which the front elastic member is arranged; and when the front waist portion contracts in the left-right direction to 55% of the maximum stretched length of the front waist portion, the left-right direction contraction force in the front intermediate portion is greater than the left-right direction contraction force in the front side edge portion.
According to the pants-type absorbent article, the front side edge portion positioned above the front side intermediate portion can be easily stretched in the left-right direction. Therefore, after the diaper is put on the infant, the contraction force in the front side edge portion is weaker than the contraction force in the front side intermediate portion, and excessive tightening pressure of the abdomen of the wearer is further suppressed.
In such a pants-type absorbent article, it is desirable that the rear waist portion has a rear intermediate portion which is a region located below the rear side edge portion in the up-down direction and in which the rear elastic member is arranged, and that when the front waist portion contracts in the left-right direction to 55% of the maximum stretched length of the front waist portion, a left-right direction contraction force in the front intermediate portion is smaller than a left-right direction contraction force in the rear intermediate portion when the rear waist portion contracts in the left-right direction to 55% of the maximum stretched length of the rear waist portion.
According to the pants-type absorbent article, in the rear intermediate portion in which all the rear elastic members are discontinuous in the lateral direction, the tensile force in the rear intermediate portion tends to be weaker than that in the front intermediate portion in which only a part of the front elastic members are discontinuous in the lateral direction. In view of this, since the contractive force is set higher in the rear intermediate portion than in the front intermediate portion, sufficient stretchability is achieved in the rear intermediate portion, and a poor fit can be suppressed when the diaper is worn.
In such a pants-type absorbent article, it is desirable that, when the front waist portion and the rear waist portion are contracted in the left-right direction to 55% of the maximum stretched length of the front waist portion and the rear waist portion, respectively, the left-right direction contraction force in the rear intermediate portion is larger than the left-right direction contraction force in the rear edge portion, the left-right direction contraction force in the rear edge portion is larger than the left-right direction contraction force in the front intermediate portion, and the left-right direction contraction force in the front intermediate portion is larger than the left-right direction contraction force in the front edge portion.
According to this pants-type absorbent article, the contractive force in the rear side waist portion is generally greater than the contractive force in the front side waist portion. Therefore, after the diaper is put on, excessive tightening pressure of the front side is suppressed, and sufficient fit is obtained at the rear side.
Embodiments of the present invention are described in detail below with reference to the accompanying drawings
First, an embodiment of a pants-type absorbent article manufactured by the manufacturing method according to the present invention will be described below by taking a disposable diaper for infants as an example. Note that the pants-type absorbent article according to the present invention is not limited to disposable diapers for infants, and may be applied to disposable diapers for adults and sanitary pants, for example.
Fig. 1 is a perspective view of a pants-type disposable diaper 1 (hereinafter, referred to as "diaper"). Fig. 2 is a plan view of the diaper 1 in an unfolded and extended state. Fig. 3 is a sectional view taken along line I-I in fig. 2.
In the state of the pants shape shown in fig. 1, the diaper 1 has up-down and left-right directions, and includes a waist opening BH and a pair of leg openings LH. The hip opening BH side is an upper side and the crotch side is a lower side with respect to the up-down direction. Further, as shown in fig. 3, the thickness direction refers to a direction in which the constituent members of the diaper 1 overlap each other, the skin side refers to a side that contacts the wearer in the thickness direction, and the non-skin side refers to a side that does not contact the wearer in the thickness direction.
The diaper 1 further includes an absorbent main body 10, a ventral waistline portion 20, and a dorsal waistline portion 30, which are three members that are rectangular in plan view. The abdomen-side waistline portion 20 (first waistline portion) is in contact with the abdomen-side region of the wearer, and the back-side waistline portion 30 (second waistline portion) is in contact with the back-side region of the wearer.
When the diaper 1 is in the developed state shown in fig. 2, the abdominal-side waistline portion 20 and the back-side waistline portion 30 are disposed so that the longitudinal direction thereof coincides with the left-right direction of the diaper 1. One end in the longitudinal direction of the absorbent main body 10 is disposed in the center portion with respect to the left-right direction of the abdomen-side waistline portion 20, and the other end in the longitudinal direction of the absorbent main body 10 is disposed in the center portion with respect to the left-right direction of the back-side waistline portion 30.
When the diaper 1 is in the unfolded state shown in fig. 2, the absorbent main body 10 is folded once at substantially the center in the longitudinal direction so that the longitudinal direction of the absorbent main body 10 coincides with the up-down direction of the diaper 1. Both side end portions of the abdomen-side waistline portion 20 in the left-right direction of the diaper 1 are joined to both side end portions of the back-side waistline portion 30 by using heat fusion, ultrasonic fusion, or the like to form a pair of joined regions 2, thereby obtaining the diaper 1 in a state of an underwear shape shown in fig. 1.
As shown in fig. 3, the absorbent body 10 includes an absorbent body 11, a liquid-permeable front sheet 12 disposed on the skin side of the absorbent body 11, a liquid-impermeable back sheet 13 disposed on the non-skin side of the absorbent body 11, and an exterior sheet 14 disposed on the non-skin side of the back sheet 13.
The absorbent body 11 includes an absorbent core 11A that absorbs and holds discharged liquid such as urine, and a liquid-permeable core-wrapping sheet 11B that covers the absorbent core 11A. For example, the absorbent core 11A is composed of liquid absorbent fibers (such as pulp containing Super Absorbent Polymer (SAP)) molded into a predetermined shape.
Further, as shown in fig. 2, leg elastic members 15 are provided on both side portions in the left-right direction of the absorbent main body 10, thereby allowing the diaper 1 to fit the legs of the wearer. For example, the leg elastic members 15 are fixed between two layers of the exterior sheets 14 folded inward in the left-right direction in a state of being stretched in the longitudinal direction of the absorbent main body 10. The leg elastic member 15 is a linear elastic member, an elastic sheet, or the like.
As shown in fig. 3, the abdominal-side waistline portion 20 and the back-side waistline portion 30 respectively include inner layer sheets 21 and 31, outer layer sheets 22 and 32 respectively covering the inner layer sheets 21 and 31, and a plurality of linear elastic members 23 and 33.
The outer sheets 22 and 32 are disposed on the non-skin side of the inner sheets 21 and 31. The inner sheets 21 and 31 and the outer sheets 22 and 32 are disposed on the non-skin side of the absorbent main body 10. It should be noted that the upper end portions 221 and 321 of the outer sheets 22 and 32 are folded down in such a manner as to cover the lengthwise ends of the absorbent main body 10 from the skin side.
The inner sheets 21 and 31 and the outer sheets 22 and 32 are each a non-stretchable sheet having substantially no stretchability in the left-right direction of the diaper 1. The inner sheets 21 and 31 and the outer sheets 22 and 32 may be composed of an SMS nonwoven sheet (spunbond/meltblown/spunbond nonwoven sheet), a spunbond nonwoven sheet, an air-permeable nonwoven sheet, a plastic sheet, a porous plastic sheet, or a laminate sheet including any of the above layers.
The linear elastic members 23 (front elastic members) are arranged side by side in the vertical direction and fixed between the inner layer sheet 21 and the outer layer sheet 22 in a state stretched in the left-right direction. Similarly, the linear elastic members 33 (rear elastic members) are arranged side by side in the vertical direction and fixed between the inner layer sheet 31 and the outer layer sheet 32 in a state stretched in the lateral direction. Therefore, the front and rear waist portions 20 and 30 can expand and contract in the right-left direction, and fit the waistline of the wearer. For example, the linear elastic members 23 and 33 are linear elastic members made of rubber, spandex fiber, or the like.
In the back-side waistline portion 30, the linear elastic member 33 (rear-side elastic member) is disposed in a range from the upper end portion to the lower end portion. However, the upper end portion of the abdomen-side waistline portion 20 is not provided with the linear elastic member 23 (front-side elastic member), but is provided with the stretchable sheet 24 having stretchability in the left-right direction. Note that, in the present embodiment, although the lower end portion of the stretchable sheet 24 overlaps the linear elastic member 23 in the vertical direction, the overlapping is not essential.
According to the structure in which the upper end portion of the abdomen-side waistline portion 20 is provided with the stretchable sheet 24 without providing the linear elastic member 23, the upper end portion of the abdomen-side waistline portion 20 is in close contact with the wearer's ground. Therefore, this suppresses local strangulation, and can suppress the trace formation by the telescopic member. In particular, the infant has an abdominal region that swells, and therefore it is advantageous to suppress the contraction of the abdomen-side waist portion 20.
Further, the stretching force in the upper end portions of the waistline portions 20 and 30 greatly affects the ability of the waistline opening BH to be easily opened when the diaper 1 is put on. The stretchable sheet 24 has a property of being easily stretched from a natural state but being hardly contracted from the stretched state. Therefore, by providing the stretchable sheet 24 at the upper end portion of the abdominal-side waistline portion 20, it is possible to more easily open the waistline opening BH when putting on the diaper 1, and also to prevent strangulation of the abdominal-side region after the waistline portions 20 and 30 have fitted to the wearer.
The stretchable sheet 24 may be constituted of a stretchable fibrous nonwoven fabric sheet manufactured by any of various known manufacturing methods, such as by having a mass of 10g/m2To 40g/m2Or more preferably 15g/m2To 30g/m2A spunbonded nonwoven fabric sheet, an air-permeable nonwoven fabric sheet, a needle-punched nonwoven fabric sheet, etc. comprising the elastic fibers. The raw material constituting the elastic fiber is a thermoplastic elastomer, rubber, or the like. In particular, when the raw material is a thermoplastic elastomer, melt spinning can be performed using an extruder as in the case of a general thermoplastic resin. The fibers thus obtained can be easily heat-welded, which is advantageous for a stretchable fiber nonwoven sheet. Examples of the thermoplastic elastomer include styrene elastomers, olefin elastomers, polyester elastomers, and polyurethane elastomers. Any of the above may be used alone, or two or more of them may be used in combination. The stretch sheet only needs to exhibit elasticity at least in the left-right direction, and may exhibit elasticity in two or more directions. The stretch ratio of the stretchable sheet 24 in the left-right direction is preferably about 1.2 times to 3.0 times.
As shown in fig. 2, the front waist portion 20 has a front edge portion Lf which is a region sandwiched between the upper end of the front waist portion 20 and the lower end of the stretchable sheet 24 in the vertical direction. The front intermediate portion Lf is a region sandwiched between the lower end of the front edge portion Lf and the linear elastic member 23x located at the lowest position among the linear elastic members 23 in the vertical direction. In other words, the front intermediate portion Lf is a region of the front waist portion 20 which is below the front edge portion Lf and includes the plurality of linear elastic members 23.
Further, the rear waist portion 30 has a rear edge portion Lb having a length from the upper end of the rear waist portion 30 equal to a length of the front edge portion Lf in the up-down direction. The rear intermediate portion Lb is a region sandwiched between the lower end of the rear edge portion Lb and the linear elastic member 33x located at the lowest position among the linear elastic members 33 in the vertical direction. In other words, the rear intermediate portion Lb is a region of the rear waist portion 30 below the rear edge portion Lb and including the plurality of linear elastic members 33.
Fig. 4 is a diagram showing an example of the action when the diaper 1 is worn. Fig. 5 is a side view of the diaper 1 in a state where the diaper 1 is worn by a wearer such as an infant or the like.
When the diaper 1 is to be put on an infant as a wearer, for example, as shown in fig. 4, first both hands are inserted into the waistline opening BH through a pair of leg openings LH, and then the waistline opening BH is opened in the left-right direction. Then, the legs of the wearer are inserted through the opened waistline opening BH, the left and right legs are inserted through the respective leg openings LH, and the diaper 1 is then pulled up toward the crotch of the wearer. However, in such a pulling-up action, there is a case where the body of the wearer is caught in the waistline opening BH, and it is difficult to put on the diaper 1 properly.
As shown in fig. 5, in the hip area of the infant, the width hb from the center to the hip is longer than the width hf from the center to the lower abdomen in the front-rear direction of the body of the wearer. In other words, the buttocks of the wearer are projected much in the front-rear direction. Therefore, when the diaper 1 is pulled up as shown in fig. 4, there is a risk that the upper end portion of the rear waist portion 30 of the waist opening BH (the region corresponding to the rear edge portion Lb) is easily caught on the buttocks of the wearer.
As shown in fig. 5, in the waistline region of the infant, the width wf from the center to the abdomen is longer than the width wb from the center to the back in the front-back direction of the body of the wearer. In other words, the wearer's abdomen is protruded forward. Therefore, after the diaper 1 is put on, the abdominal side of the waistline region contracts more than the back side, and there is a risk of leaving a mark of gather in the abdominal part of the wearer and causing discomfort to the wearer.
In view of this, in the diaper of the present embodiment, when the diaper 1 is worn, the upper end portion of the rear waist portion 30 can be more easily stretched in the left-right direction in the operation of opening the waist opening BH in the left-right direction, and the situation where the upper end portion is caught on the buttocks of the wearer is suppressed. Specifically, when the front waist portion 20 and the rear waist portion 30 are pulled in the left-right direction, the left-right direction tensile force acting on the rear edge portion Lb as the upper end portion of the rear waist portion 30 is smaller than the left-right direction tensile force acting on the front edge portion Lf as the upper end portion of the front waist portion 20, so that the rear edge portion Lb is more easily pulled.
In contrast, after the diaper 1 is put on, the upper end portion of the front side waist portion 20 can be more easily stretched in the left-right direction, thereby preventing excessive strangulation of the abdomen of the wearer. Specifically, when the front waist portion 20 and the rear waist portion 30 contract in the left-right direction, the left-right direction contraction force acting on the front edge portion Lf, which is the upper end portion of the front waist portion 20, is smaller than the left-right direction contraction force acting on the rear edge portion Lb, which is the upper end portion of the rear waist portion 30, so that the front edge portion Lf is more easily stretched.
Fig. 6 is a diagram showing changes in the tensile force at the side edge portions Lf and Lb when the side edge portions Lf and Lb are pulled in the left-right direction in the operation of opening the waistline opening BH of the diaper 1. Fig. 7 is a view showing changes in contraction force at the side edge portions when the front side edge portion Lf and the rear side edge portion Lb contract in the left-right direction in the operation of fitting the waistline opening BH of the diaper 1 to the waistline of the wearer.
Fig. 6 and 7 show the results of the tensile test performed on the measurement target portion of the diaper 1. Specifically, the front side edge portion Lf is cut out from the front waist portion 20 of the diaper 1 in a natural state, and a measurement section having a length of 140mm in the left-right direction of the front side edge portion Lf is clamped in a chuck of a tensile tester (manufactured by Instron). The measurement section was then pulled at a speed of 100mm/min on both left and right sides to elongate it to a length of approximately 270 mm. Next, after the extension to about 270mm, the front edge portion Lf was allowed to contract at a speed of 100mm/min until the length of the measurement section in the left-right direction was restored to 140 mm. This cycle was performed twice. During the pulling of the first cycle, the force (i.e., tensile force) required for the extension of the measurement target site is measured and recorded for the measurement target sites of various lengths of extension. Then, during the contraction period of the second cycle, the force required for the contraction of the measurement target site (i.e., the contraction force) is measured and recorded for the measurement target sites contracted by various lengths.
Similarly, the rear side edge portion Lb is cut out from the rear waist portion 30 of the diaper 1 in a natural state, and a tensile force in the process of extending to the left and right sides and a contractive force in the process of contracting from the left and right sides are measured while performing a tensile test twice in a measurement section in which the length of the rear side edge portion Lb in the left and right direction is 140 mm. Fig. 6 and 7 are graphs in which the horizontal axis shows the ratio of the length of the front edge portion Lf and the rear edge portion Lb to the maximum left-right direction elongation length, the vertical axis shows the magnitude of tensile force or contraction force at the respective tensile ratios, and these graphs show the relationship between the force of the front edge portion Lf and the rear edge portion Lb and the tensile ratio based on the results of the above-described tensile test.
Although not shown, the front intermediate portion lf and the rear intermediate portion lb were similarly measured. Specifically, the front intermediate portion lf and the rear intermediate portion lb are cut out from the diaper 1 in a natural state, and the same tension test as described above is performed on the measurement section having a length of 140mm in the left-right direction, and the magnitude of the tensile force during stretching and the magnitude of the contractive force during contraction are measured. Note that the absorbent main body 10 is also included in the front intermediate portion lf and the rear intermediate portion lb, and the absorbent main body 10 is also cut when the front intermediate portion lf and the rear intermediate portion lb are cut. Thus, during the stretching and shrinking of the diaper 1 in the product state, data can be obtained under the same conditions.
Note that the "natural state" is a state in which the diaper 1 is left alone for a predetermined time. For example, the diaper 1 in the product state is taken out of the package, and the front side waist portion 20 and the back side waist portion 30 are pulled to both outer sides in the left-right direction to put the waist portions 20 and 30 in the "stretched state". Then, the extended state is maintained for 15 seconds, and then pulling is stopped and the diaper 1 is placed on a flat surface of a table or the like. The natural state is a state after laying flat for 5 minutes.
As is clear from fig. 6, in the action of stretching the front edge portion Lf and the rear edge portion Lb in the left-right direction, the stretching force in the front edge portion Lf is smaller than the stretching force in the rear edge portion Lb in a region where the stretching ratio is less than about 50%. However, in the region where the stretch ratio is greater than about 50%, the stretching force in the front side edge portion Lf is greater than the stretching force in the rear side edge portion Lb.
As described above, during the operation of the diaper 1, the front edge portion Lf (front waist portion 20) and the rear edge portion Lb (rear waist portion 30) are pulled to the left and right. At this time, it is statistically known that the waistline portions 20 and 30 are stretched to a length of about 85% of the maximum stretching length in the left-right direction. In other words, the stretching force at a stretch ratio of 85% is a force required for wearing the diaper 1. Considering that the stretching force in the front side edge portion Lf is larger than the stretching force in the rear side edge portion Lb at a stretch ratio of 85% in fig. 6, it can be understood that the force required to stretch the rear side edge portion Lb is smaller than the force required to stretch the front side edge portion Lf when the diaper 1 is put on. In other words, on the hip side, the upper end portion of the rear waist portion 30 is more easily stretched and thus less likely to be caught on the hip of the wearer.
However, as is clear from fig. 7, when the front edge portion Lf and the rear edge portion Lb are allowed to contract in the left-right direction, the contraction force in the front edge portion Lf is greater than that in the rear edge portion Lb in a region where the stretch ratio is greater than about 70%. However, in the region where the stretch ratio is less than about 70%, the contraction force in the front side edge portion Lf is smaller than that in the rear side edge portion Lb.
As described above, when the diaper 1 is worn, the front side edge portion Lf (front waist portion 20) and the rear side edge portion Lb (rear waist portion 30) contract in the left-right direction. At this time, it is statistically known that the waistline portions 20 and 30 contract to a length of about 55% of the maximum stretched length in the right-left direction. In other words, the contraction force at the time of contraction to a stretch ratio of 55% is a force necessary to prevent the diaper 1 from being displaced or the like when the diaper 1 is worn. Considering that the contraction force in the front side edge portion Lf is smaller than that in the rear side edge portion Lb at a stretch ratio of 55% in fig. 7, it can be understood that the rear side edge portion Lb in the front side edge portion Lf is smaller than that in the rear side edge portion Lb after the diaper 1 is put on. In other words, the upper end portion of the front waist portion 20 is more easily stretched on the abdomen side, and the excessive tightening pressure of the abdomen of the wearer can be suppressed.
Note that, in the operation of actually putting on the diaper 1, the stretch ratio when pulling the front side edge portion Lf and the rear side edge portion Lb in the left-right direction varies depending on the body size of the infant and other conditions, but this is the case when the stretch ratio is expected to be in the range of 90% to 65% of the maximum stretched length. In fig. 6, the tensile force in the front side edge portion Lf is greater than the tensile force in the rear side edge portion Lb at all ratios in the range of 90% to 60%. Therefore, when the diaper 1 is put on, the upper end portion of the back side waist portion 30 on the hip portion side can be easily stretched and is less likely to be caught on the hip portion of the wearer in all cases.
In fig. 6, the higher the stretch ratio of the front edge Lf and the rear edge Lb, the larger the difference between the stretching forces. In other words, the higher the ratio of the left-right direction length of the front edge portion Lf and the rear edge portion Lb to the left-right direction maximum stretching length of the front edge portion Lf and the rear edge portion Lb, the larger the difference between the stretching force in the front edge portion Lf and the stretching force in the rear edge portion Lb. That is, the more the front edge portion Lf and the rear edge portion Lb are stretched in the left-right direction, the more easily the rear edge portion Lb is stretched with respect to the front edge portion Lf. Therefore, the upper end portion of the rear waist portion 30 is less likely to be caught on the buttocks of the wearer when the diaper 1 is worn.
After the diaper 1 is actually put on the wearer, the ratio of contraction in the left-right direction of the front edge portion Lf and the rear edge portion Lb is expected to be in the range of 60% to 45% of the maximum stretched length. In fig. 7, the contraction force in the front side edge portion Lf is smaller than that in the rear side edge portion Lb at all ratios in the range of 65% to 45%. Therefore, when the diaper 1 is put on, the upper end portion of the front waist portion 20 on the abdomen side can be easily stretched in all cases, and the tightening pressure of the abdomen of the wearer is suppressed.
In fig. 7, the smaller the stretch ratio between the front edge portion Lf and the rear edge portion Lb, the larger the difference between the contraction forces. In other words, the lower the ratio of the left-right direction length of the front edge portion Lf and the rear edge portion Lb to the left-right direction maximum stretched length of the front edge portion Lf and the rear edge portion Lb, the greater the difference between the contraction force in the front edge portion Lf and the contraction force in the rear edge portion Lb. That is, the more the front edge portion Lf and the rear edge portion Lb contract, the more easily the front edge portion Lf is stretched with respect to the rear edge portion Lb. Therefore, after the diaper 1 is worn, excessive tightening pressure of the upper end portion of the front waist portion 20 against the abdomen of the wearer can be further suppressed.
As described above, in the diaper 1 wearing operation, the waistline opening BH is opened and pulled up from the toe side of the wearer to the crotch side of the wearer. Therefore, the more the upper end portion of the rear waist portion 30 is opened, the smoother the diaper 1 is put on. In the present embodiment, when the rear waist portion 30 is stretched in the left-right direction to 85% of the maximum stretched length, the left-right direction stretching force in the rear intermediate portion Lb is larger than the left-right direction stretching force in the rear edge portion Lb. In other words, the rear edge portion Lb located above the rear intermediate portion Lb can be more easily stretched in the left-right direction. Therefore, in the action of opening the waistline opening BH as shown in fig. 4, the upper end portion of the rear-side waistline portion 30 can be more easily opened, and the diaper 1 can be smoothly put on.
Similarly, in the operation of putting on the diaper 1, the more the upper end portion of the front waist portion 20 is opened, the smoother the putting on of the diaper 1 becomes. In the present embodiment, when the front waist portion 20 is stretched to 85% of the maximum stretching length in the left-right direction, the left-right direction stretching force in the front intermediate portion Lf is larger than the left-right direction stretching force in the front edge portion Lf. In other words, the front side edge portion Lf located above the front side intermediate portion Lf can be more easily stretched in the left-right direction. Therefore, in the action of opening the waistline opening BH as shown in fig. 4, the upper end portion of the front waistline portion 20 can be more easily opened, and the diaper 1 can be smoothly put on.
Further, the left-right direction stretching force in the front intermediate portion lf when the front side waist portion 20 is stretched in the left-right direction to 85% of the maximum stretched length of the front side waist portion 20 is smaller than the left-right direction stretching force in the rear intermediate portion lb when the length of the rear side waist portion 30 is 85% of the maximum stretched length of the rear side waist portion 30. As shown in fig. 2, in the front side intermediate portion lf, a part of the linear elastic members 23 are continuous in the left-right direction, so that the upper end portion of the absorbent main body 10 (absorbent core 11A) is made stretchable and the front side upper end portion of the absorbent main body 10 is less likely to be displaced from the abdominal region of the wearer. On the other hand, in the rear intermediate portion lb, all the linear elastic members 33 are discontinuous in the central portion in the left-right direction. Therefore, in the rear intermediate portion lb, the stretch ratio is increased so that the lateral stretching force is higher than the lateral stretching force in the front intermediate portion lf when the linear elastic member 33 is fixed to the rear waist portion 30. With this configuration, when the diaper 1 is worn, the rear intermediate portion lb exhibits sufficient stretchability, and poor fitting in the corresponding region is suppressed. Therefore, the lateral stretching force in the rear intermediate portion lb is also higher than the lateral stretching force in the front intermediate portion lf during the operation of the diaper 1.
The following is a comparison of the tensile forces in the front side edge portions Lf, the front middle portion Lf, the rear side edge portions Lb, and the rear middle portion Lb when the waist portions 20 and 30 are stretched to 85% of the maximum stretched length. That is, the left-right direction tensile force in the rear intermediate portion Lb, the left-right direction tensile force in the front intermediate portion Lf, the left-right direction tensile force in the front edge portion Lf, and the left-right direction tensile force in the rear edge portion Lb become smaller in this order. Therefore, in the diaper 1, the difference between the tension in the rear intermediate portion Lb and the tension in the rear edge portion Lb is larger than the difference between the tension in the front intermediate portion Lf and the tension in the front edge portion Lf. Therefore, when the waistline opening BH of the diaper 1 is opened as shown in fig. 4, the difference in stretching force between the rear side edge portion Lb and the rear side intermediate portion Lb is larger in the rear side, and the rear side edge portion Lb can be more easily stretched when a right-left direction expanding force is applied. Therefore, the rear edge portion Lb can be further suppressed from being caught on the hip of the wearer during the diaper 1 wearing operation.
As shown in fig. 5, after the diaper 1 is put on the infant, the width wf from the waist center of the infant to the abdomen is larger than the width hf from the hip center of the infant to the lower abdomen area of the infant. In the present embodiment, when the front waist portion 20 contracts in the left-right direction to 55% of the maximum stretched length of the front waist portion 20, the left-right direction contraction force in the front intermediate portion Lf is greater than the left-right direction contraction force in the front edge portion Lf. In other words, the front side edge portion Lf located above the front side intermediate portion Lf can be stretched more easily in the left-right direction than the front side intermediate portion Lf. Therefore, after the diaper 1 is put on the infant, the contraction force in the front side edge portion Lf is weaker than the contraction force in the front side intermediate portion Lf, and excessive tightening pressure on the abdomen of the wearer is further suppressed.
Further, the left-right direction contractive force in the front intermediate portion lf when the front waist portion 20 contracts in the left-right direction to 55% of the maximum stretched length of the front waist portion 20 is smaller than the left-right direction contractive force in the rear intermediate portion lb when the length of the rear waist portion 30 is 55% of the maximum stretched length of the rear waist portion 30. As described above, in the rear intermediate portion lb, all the linear elastic members 33 are discontinuous in the central portion in the left-right direction, and therefore, when the linear elastic members 33 are fixed, the stretch ratio increases. Therefore, when the diaper 1 is worn, the lateral contraction force in the rear intermediate portion lb is larger than the lateral contraction force in the front intermediate portion lf.
The following is a comparison of contraction forces in the front side edge portion Lf, the front intermediate portion Lf, the rear side edge portion Lb, and the rear intermediate portion Lb when the waist portions 20 and 30 each have a length of 55% of their maximum stretched length. That is, the lateral contraction force in the rear intermediate portion Lb, the lateral contraction force in the rear edge portion Lb, the lateral contraction force in the front intermediate portion Lf, and the lateral contraction force in the front edge portion Lf are sequentially reduced. Therefore, in general, the contractive force in the rear waist portion 30 is greater than the contractive force in the front waist portion 20. Therefore, after the diaper 1 is put on, excessive tightening pressure on the front side is suppressed, and sufficient fit is obtained on the rear side. Therefore, the displacement of the diaper 1 is suppressed, and the wearer does not feel discomfort easily.
In other embodiments, the invention is not limited to the specific embodiments described
Although the embodiments of the present invention have been described above, the above embodiments of the present invention are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the present invention in any way. Various changes or modifications may be made to the invention without departing from the spirit thereof, and the invention encompasses equivalents thereof.
For example, the stretchable sheet 24 is not limited to be provided in the upper end portion of the abdomen-side waistline portion 20. The stretchable sheet 24 may be provided at any position in the abdominal-side waistline portion 20 in the up-down direction. In addition, the following configuration is possible: the back-side waistline portion 30 (first waistline portion) may have an elastic sheet, and the abdomen-side waistline portion 20 (second waistline portion) may not have an elastic sheet, or both the abdomen-side waistline portion 20 and the back-side waistline portion 30 may have an elastic sheet 24.
In addition, although the so-called three-piece type disposable diaper including the front side waist body portion 20, the rear side waist body portion 30 and the absorbent main body 10 is explained as the pants-type absorbent article in the above-described embodiment, it is not limited thereto. For example, the pant-type absorbent article may be a diaper as follows: the outer sheet 14 integrally connects the front waist portion 20 and the back waist portion 30 (so-called two-piece diaper).
Description of the reference numerals
1 diaper (pants-type absorbent article), 2 joining region,
10 an absorbent body, 11 an absorbent body,
An 11A absorbent core, an 11B core wrapping sheet,
12 front surface pieces, 13 back surface pieces,
14 outer sheet, 15 leg elastic member,
20 front waist part (first waist part),
21 inner layer sheet (non-stretchable sheet) and 22 outer layer sheet (non-stretchable sheet),
23 linear elastic members, 24 stretchable sheets,
30 rear waist portion (second waist portion), 31 inner layer sheet,
32 outer layer sheets, 33 linear elastic members,
Lf front edge part, Lf front middle part,
Lb rear edge part and Lb rear middle part
Claims (12)
1. A pants-type absorbent article having a vertical direction, a horizontal direction and a front-rear direction intersecting each other,
the pants-type absorbent article includes:
an absorbent main body;
a front waist section including a stretchable sheet and a front elastic member both stretchable in the left-right direction; and
a rear waist portion including a rear elastic member stretchable in the right and left direction,
the front waist portion has a front edge portion which is a region sandwiched between an upper end of the front waist portion and a lower end of the stretchable sheet in the up-down direction,
the rear waist portion has a rear edge portion whose length in the up-down direction from an upper end of the rear waist portion is equal to a length in the up-down direction of the front edge portion,
a right-left direction stretching force in the front side edge portion when the front side waist portion is stretched in the right-left direction to 85% of a maximum stretched length of the front side waist portion
Is greater than
A right-left direction stretching force in the rear side edge portion when the rear side waist portion is stretched in the right-left direction to 85% of a maximum stretched length of the rear side waist portion, and
a lateral contractive force in the front side edge portion when the front side waist portion contracts in the lateral direction to 55% of a maximum stretched length of the front side waist portion
Is less than
A left-right direction contractive force of the rear side edge portion when the rear side waist portion contracts in the left-right direction to 55% of a maximum stretched length of the rear side waist portion.
2. A pant-type absorbent article according to claim 1,
a right-left direction stretching force in the front side edge portion when the front side waist portion is stretched in the right-left direction to a length equal to a predetermined ratio in a range of 90% to 65% of a maximum stretched length of the front side waist portion
Is greater than
A right-left direction stretching force in the rear side edge portion when the rear side waist portion is stretched in the right-left direction to a length equal to the predetermined ratio in the range of 90% to 65% of the maximum stretched length of the rear side waist portion.
3. A pant-type absorbent article according to claim 2,
the greater the ratio of the length of each of the front and rear waist portions to the maximum stretched length of each of the front and rear waist portions in the left-right direction,
the greater the difference between the right-left direction stretching force in the front side edge portion and the right-left direction stretching force in the rear side edge portion.
4. A pant-type absorbent article according to any one of claims 1 to 3,
a right-left direction contractive force in the front side edge portion when the front side waist portion contracts in the right-left direction to a length equal to a predetermined ratio in a range of 60% to 45% of a maximum stretched length of the front side waist portion
Is less than
A left-right direction contractive force in the rear side edge portion when the rear side waist portion contracts in the left-right direction to a length equal to the predetermined ratio in the range of 60% to 45% of the maximum stretched length of the rear side waist portion.
5. A pant-type absorbent article according to claim 4,
the smaller the ratio of the length of each of the front and rear waist portions to the maximum stretched length of each of the front and rear waist portions in the left-right direction,
the greater the difference between the lateral contraction force in the front edge portion and the lateral contraction force in the rear edge portion.
6. A pant-type absorbent article according to any one of claims 1 to 5,
the rear waist portion has a rear intermediate portion which is a region located below the rear edge portion in the up-down direction and in which the rear elastic member is arranged, and the rear intermediate portion is a region located below the rear edge portion in the up-down direction
When the rear waist portion is stretched in the right-left direction to 85% of the maximum stretched length of the rear waist portion,
the left-right direction tensile force in the rear side middle portion is greater than the left-right direction tensile force in the rear side edge portion.
7. A pant-type absorbent article according to claim 6,
the front waist portion has a front intermediate portion which is a region located below the front edge portion in the up-down direction and in which the front elastic member is arranged, and the front intermediate portion is a region located below the front edge portion in the up-down direction
When the front waist portion is stretched in the right-left direction to 85% of the maximum stretched length of the front waist portion,
the left-right direction tensile force in the front side middle portion is greater than the left-right direction tensile force in the front side edge portion.
8. A pant-type absorbent article according to claim 7,
a right-left direction stretching force in the front-side intermediate portion when the front-side waist portion is stretched in the right-left direction to 85% of a maximum stretched length of the front-side waist portion
Is less than
A right-left direction stretching force in the rear-side intermediate portion when the rear-side waist portion is stretched in the right-left direction to 85% of a maximum stretched length of the rear-side waist portion.
9. A pant-type absorbent article according to claim 8,
when the front and rear waist portions are stretched in the right-left direction to 85% of the maximum stretched length of the front and rear waist portions respectively,
the left-right direction tensile force in the rear side intermediate portion is greater than the left-right direction tensile force in the front side intermediate portion,
a left-right direction tensile force in the front side middle part is larger than a left-right direction tensile force in the front side edge part, and
the left-right direction tensile force in the front side edge portion is larger than the left-right direction tensile force in the rear side edge portion.
10. A pant-type absorbent article according to any one of claims 1 to 9,
the front waist portion has a front intermediate portion that is a region located below the front edge portion in the up-down direction and in which the front elastic member is arranged; and is
When the front waist portion is contracted to 55% of the maximum stretched length of the front waist portion in the right-left direction,
the lateral contraction force in the front intermediate portion is greater than the lateral contraction force in the front side edge portion.
11. A pant-type absorbent article according to claim 10,
the rear waist portion has a rear intermediate portion which is a region located below the rear edge portion in the up-down direction and in which the rear elastic member is arranged, and the rear intermediate portion is a region located below the rear edge portion in the up-down direction
A lateral contractive force in the front intermediate portion when the front waist portion contracts in the lateral direction to 55% of a maximum stretched length of the front waist portion
Is less than
A right-left direction contractive force in the rear intermediate portion when the rear waist portion contracts in the right-left direction to 55% of a maximum stretched length of the rear waist portion.
12. A pant-type absorbent article according to claim 11,
when the front and rear waist portions are contracted in the left-right direction to 55% of the maximum stretched length of the front and rear waist portions respectively,
a left-right direction contraction force in the rear side intermediate portion is larger than a left-right direction contraction force in the rear side edge portion,
the left-right direction contraction force in the rear side edge portion is larger than the left-right direction contraction force in the front side intermediate portion, and
the lateral contraction force in the front intermediate portion is greater than the lateral contraction force in the front side edge portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-254941 | 2017-12-28 | ||
| JP2017254941A JP6642908B2 (en) | 2017-12-28 | 2017-12-28 | Pants-type absorbent article |
| PCT/JP2018/045074 WO2019131058A1 (en) | 2017-12-28 | 2018-12-07 | Pants-type absorbent article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111565686A true CN111565686A (en) | 2020-08-21 |
| CN111565686B CN111565686B (en) | 2022-11-01 |
Family
ID=67063460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880084010.4A Active CN111565686B (en) | 2017-12-28 | 2018-12-07 | Pants-type absorbent article |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6642908B2 (en) |
| CN (1) | CN111565686B (en) |
| RU (1) | RU2736451C1 (en) |
| WO (1) | WO2019131058A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7406989B2 (en) * | 2019-12-27 | 2023-12-28 | ユニ・チャーム株式会社 | absorbent articles |
| JP2022157106A (en) * | 2021-03-31 | 2022-10-14 | ユニ・チャーム株式会社 | Underpants type disposable diaper |
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| US6287287B1 (en) * | 1998-06-19 | 2001-09-11 | Kimberly-Clark Worldwide, Inc. | Disposable absorbent articles having passive side bonds and adjustable fastening systems |
| SE0200473D0 (en) * | 2002-02-19 | 2002-02-19 | Sca Hygiene Prod Ab | Elastic absorbent pants |
| RU88957U1 (en) * | 2009-05-18 | 2009-11-27 | Марина Геннадьевна Присмотрова | DIAPER |
| RU112038U1 (en) * | 2011-09-12 | 2012-01-10 | Общество с ограниченной ответственностью "Холдинг Беби Групп" | DIAPER |
| RU121732U1 (en) * | 2012-06-08 | 2012-11-10 | Общество с ограниченной ответственностью "Современная мама" | SIZE ADJUSTABLE DIAPER |
| JP6195761B2 (en) * | 2013-08-20 | 2017-09-13 | ユニ・チャーム株式会社 | Absorbent articles |
-
2017
- 2017-12-28 JP JP2017254941A patent/JP6642908B2/en active Active
-
2018
- 2018-12-07 WO PCT/JP2018/045074 patent/WO2019131058A1/en active Application Filing
- 2018-12-07 CN CN201880084010.4A patent/CN111565686B/en active Active
- 2018-12-07 RU RU2020121484A patent/RU2736451C1/en active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0999006A (en) * | 1995-10-04 | 1997-04-15 | Kao Corp | Disposable briefs-shaped diaper |
| CN102686198A (en) * | 2009-12-28 | 2012-09-19 | 尤妮佳股份有限公司 | Disposable wearing article |
| CN103619296A (en) * | 2011-06-21 | 2014-03-05 | 宝洁公司 | Absorbent article with waistband having contraction |
| JP2013118962A (en) * | 2011-12-07 | 2013-06-17 | Unicharm Corp | Disposable clothing article |
| JP2015073636A (en) * | 2013-10-07 | 2015-04-20 | ユニ・チャーム株式会社 | Disposable diaper |
| JP2016158815A (en) * | 2015-02-27 | 2016-09-05 | ユニ・チャーム株式会社 | Disposable diaper |
| WO2017149683A1 (en) * | 2016-03-01 | 2017-09-08 | ユニ・チャーム株式会社 | Pants-type absorbent article |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6642908B2 (en) | 2020-02-12 |
| CN111565686B (en) | 2022-11-01 |
| RU2736451C1 (en) | 2020-11-17 |
| JP2019118553A (en) | 2019-07-22 |
| WO2019131058A1 (en) | 2019-07-04 |
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