JPH09117468A - Underpants type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fitting and wearing feeling by arranging a fibrous stretchable and elastic material member on the surface sheet or the back sheet of a front part along the periphery of the waist in a pants type disposable diaper having a stretchable and elastic member along the opening around waist and openings around both legs. SOLUTION: A pants type disposable diaper 1 comprises openings 2 around the legs and an opening 3 around the waist, a front part 4 and a rear part 5 adhered each other with a side seam 6. A stretchable and elastic member is arranged on the both sides of an absorbing material near the opening 2 around legs and a stretchable and elastic member is arranged near the opening along the waist thereby stretchable elasticity is given to each opening. In this case, a waist stretchable and elastic member 13 made of a plurality of fibrous stretchable elastic materials is made to bond to the side flaps of the left and right sides of the front part 5 to give a stretching elasticity at a portion corresponding to the waist and thereby the fitting feeling on wearing is improved.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper which is preliminarily formed in a pants type.

[0001]

2. Description of the Related Art As conventional diapers, for example,
In a side flap of a flat type diaper as disclosed in Japanese Patent Application Laid-Open No. 57-77304, the portions corresponding to the left and right flanks when worn are preliminarily joined and fixed, and the waist opening and leg opening are formed. A so-called pants-type diaper provided has been proposed. Such a pants-type diaper can be attached and detached by a wearer, and its demand has been increasing even when the infant is leaving the diaper or for adults such as incontinence. In such a pants-type disposable diaper, stretch elasticity is added to the openings around both legs, the waist opening, and both sides around the waist in order to improve the followability and fit of the diaper to the wearer. Has become the mainstream, for example, Japanese Utility Model Laid-Open No. 3-16920, Japanese Patent Laid-Open No. 4-28363, Japanese Patent Laid-Open No. 2-4364, Japanese Patent Laid-Open No. 4-166150, Japanese Patent Laid-Open No. 4-289.
A pants-type disposable diaper as disclosed in Japanese Patent No. 201 has been proposed.

[0002]

[Problems to be Solved by the Invention] Of the above-mentioned pants-type disposable diapers that have already been proposed, 3-16
In a pants-type disposable diaper as described in Japanese Patent Application Publication No. 920 and Japanese Patent Application Laid-Open No. 4-28363, elastic elastic members that can be expanded and contracted are arranged in the openings around the waist and the openings around both legs. It has the function of squeezing these openings to fit the absorber to the wearer and preventing leakage from the openings. However, since the waist side does not have elastic elasticity, the fit is incomplete, and if urine or the like is absorbed during wearing, the weight of the diaper will increase and the diaper will fall off, resulting in leakage from the opening. It was

Further, in a pants-type disposable diaper as described in Japanese Patent Laid-Open No. 4364/1990, since elastic side panels are provided on both sides of the diaper, the fitting property during wearing is relatively small. Although it is good and the diaper does not easily slip off, on the other hand, there is a problem that the elastic side panel has to be greatly stretched when the diaper is detached, which makes it difficult to attach and detach. In addition, Japanese Patent Laid-Open No. 4-166
In a pants-type disposable diaper as described in Japanese Patent Laid-Open No. 150-289201 and Japanese Patent Laid-Open No. 4-289201, stretchable elastic members are arranged all around the waist to improve the fit. By disposing the stretchable elastic member, the number of elements constituting the diaper increases, and the number of steps also increases, which may be a hindrance in achieving the purpose of mass production at low cost necessary for all the articles to be used. Furthermore, since the stretchable elastic member arranged essentially tightens in the direction along the waist of the wearer, the effect of suppressing the diaper from falling down is obtained, but in some cases, the tightening force is reduced. It may become too large and give the wearer more pressure than necessary, and when attaching and detaching the diaper, a large number of stretchable elastic members must be extended, which makes it difficult to attach and detach the diaper. There was a problem.

[0004]

According to the present invention, the above problems are solved, and the diaper can be easily put on and taken off while the feeling of pressure on the abdomen of the wearer is minimized, and the fit of the absorbent body to the human body is good. Moreover, as a result of examining the arrangement of the elastic elastic member around the waist, which can prevent the leakage of urine from the abdomen, it was found that it is effective to arrange the elastic member around the waist of the front part of the diaper, and the present invention is completed. Came to do.

The present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body arranged between these sheets, and the front body and the wearer's anterior body located on the ventral side of the wearer. It is formed by joining both side edges extending from the back body located on the back side, has an opening around the waist and around both legs, and a stretchable elastic member is arranged along the opening. In the diaper, a thread-like elastic elastic member around the waist is further continuously arranged along the waist in a predetermined region of the front body waist part or the back sheet, and the thread-shaped elastic member arranged in the predetermined region. The present invention relates to a pants-type disposable diaper, characterized in that both ends of the elastic elastic member are arranged at a joint between the front body and the rear body between the waist opening and the leg openings.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION According to the pants-type disposable diaper of the present invention, a plurality of thread-like elastic elastic members are provided along a waist region in a predetermined region of the front body corresponding to the waist of the wearer when worn. They are arranged consecutively. In addition, these stretchable elastic members have a predetermined area limited so that both ends of the stretchable elastic member are arranged at the joint portion of the front body and the back body between the waist opening and the both leg openings. It is provided only in the diaper, and is arranged only in the minimum area necessary for properly absorbing urine into the absorber by maintaining close contact with the wearer of the diaper during wearing.

The arrangement in the predetermined area shown in the present invention is sufficient for suppressing the displacement caused by various movements of the body of the worn diaper and the weight of the diaper itself and maintaining the conformability to the body. This is especially between the waist opening and the legs opening of the front part of the diaper corresponding to the elastic elastic member around the waist, and the both ends of the elastic elastic member are the front body and the back body. Just by arranging it only in a predetermined area that is located at the joint part, the elastic elastic member provides an appropriate tightening action in the widest area with the most unevenness from the abdomen to the waist, and accordingly the absorber also has an appropriate size. Since it is possible to maintain a high degree of adhesion, the ability to follow the wearer of the diaper is maintained. At this time, even if the diaper is brought into close contact with the body by the tightening force necessary to hold the diaper around the waist, the body does not feel a great deal of pressure.

[0008] On the other hand, when the thread-like elastic elastic member around the waist arranged in a predetermined area of the front body or the back sheet corresponding to the waist when the present invention is worn is replaced with the rear body side of the diaper, The region from the back to the buttocks where the elastic member is arranged is a place where the diaper covers the human body with relatively few irregularities. Therefore, the absorber can appropriately follow the wearer without disposing the elastic elastic member, but when the elastic elastic member is intentionally arranged, the effect on the fit of the diaper can be obtained. However, in some cases, the absorber adheres too much to the entire skin,
It may cause unevenness or rash, which is not preferable. Further, even when the elastic elastic member is arranged all around the waist, it can be said that the elastic member arranged on the back body is unnecessary for the same reason as described above, and at the time of attachment / detachment. A large number of stretchable elastic members must be stretched, which causes a problem that it is difficult to attach and detach the diaper. In addition, arranging a large number of elastic elastic members on the front body and the back body increases the number of elements constituting the diaper and also increases the number of steps, so that the purpose of mass production at low cost necessary for all used articles can be achieved. It is also a hindrance.

As the liquid-permeable surface sheet used for the pants-type diaper of the present invention, a liquid-permeable nonwoven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester or other thermoplastic resin is used. Liquid impermeable polyethylene sheet as the back sheet,
It is more comfortable to give moisture permeability by using a liquid-impermeable sheet having moisture permeability such as a polyethylene sheet having micropores or a sheet obtained by adding a filler to a thermoplastic resin and stretching, so that it is more comfortable without stuffing.

Further, the elastic elastic members arranged in the waist opening and leg openings are the elastic elastic bodies such as urethane thread, rubber thread, urethane film, urethane foam, etc., which are generally used in diapers. These stretchable elastic members can be used in a stretched state, respectively, in the leg openings, the waist openings, and the predetermined regions of the back body, and are fixed by a hot-melt adhesive.

Further, it is preferable to use a thread-like elastic elastic member such as urethane thread or rubber thread as the elastic elastic member arranged around the waist, and the elastic member is arranged in the minimum necessary area which is the object of the present invention. In order to improve the followability to the wearer and to prevent the diaper from slipping off, at least 2 or more, preferably 5 to 10 or so thread-like elastic elastic members are at least 20 mm or less, preferably 5 to 10 mm apart. However, it is needless to say that the number and interval of these can be freely selected within the above range depending on the elongation stress of the thread-like elastic elastic member to be used and the degree of elongation at the time of adhesive fixing. It is preferable that the absorbent be mainly composed of fluff pulp and be used in combination with a high-absorbency polymer. In addition, a single absorbent paper or a mixture or a laminate of heat-fused fibers is used. Further, it is preferable to have a laminated structure in which the whole is wrapped with tissue, and the shape of the absorber may be an hourglass type or a rectangular type, but the hourglass type can obtain a better fit property.

[0012]

The present invention will be described in detail below with reference to the drawings showing the embodiments of the present invention, but the present invention is not limited to these embodiments. FIG. 1 is a perspective view of a pants-type disposable diaper according to an embodiment of the present invention when viewed from the side of the front body. The pants-type disposable diaper 1 of the present invention shown in FIG. 1 has a leg opening 2 and a waist opening 3, and a front body 4 extending between the left and right leg openings. The rear body 5 is adhesively closed by a side seam portion 6. Further, the waist elastic elastic member 13 is arranged only in the area between the waist opening 3 and the leg opening 2 in a predetermined area of the front sheet 5 or the back sheet corresponding to the waist when worn. Has been done.

The side seam portion 6 is adhesively closed by superposing the front body 4 and the back body 5 and protruding both side edges outward, or both side edges protruding inward, or one side edge outside and the other side. In the state where the side edges of the above are protruded inward, hot melt adhesive, pressure melting, melting by ultrasonic wave and the like are used alone or in combination along the outermost portions of both side edges.

By the above-mentioned joining, the impact fracture stress at the joining portion (the force at which the joining portion is broken by the force of 5 kgf) is 6
00 to 2500 gf / 25 mm, preferably 800 to 2
000 gf / 25 mm and 180 ° peel stress (200
The force of peeling the joint to 180 ° at a pulling speed of mm / min) is 600 to 4500 gf / 50 mm, preferably 800 to 3500 gf / 50 mm, which means that the joint is destroyed by the impact during wearing, and It is suitable without the difficulty of disassembling and removing from the wearer.

FIG. 2 is a perspective view showing an expanded state in which the side seam portion 6 of the pants-type diaper 1 of the present invention shown in FIG. 1 is opened and expanded, and the side seam portion when worn in the state of FIG. Both sides joined by 6 are shown as side flaps 7 by open deployment. Leg elastic elastic members 9, 10 provided on both sides in the longitudinal center of the absorbent body 8 are provided in the vicinity of the left and right leg openings 2, and a waist elastic elastic member 11 is provided in the vicinity of the waist opening. , 12 are provided, and elastic elasticity is given to each opening. In addition, a waist elastic member 13 made of a plurality of thread-shaped elastic members is arranged so as to connect the left and right side flaps 7 on the front body 5 side, and elastic elasticity is imparted to a region corresponding to the waist when worn. ing.

FIG. 3 is a cross-sectional view of the top sheet 14 of the pants-type diaper 1 of the present invention shown in FIG. 1 in which a waist elastic elastic member is arranged in a predetermined region, taken along line XX 'in FIG. 3 is a transverse cross-sectional view of the elastic member 13 around the waist, which is arranged between the topsheet 14 and the absorber 8. FIG. FIG. 4 is a cross-sectional view of the backsheet 15 of the underpants-type disposable diaper 1 of the present invention shown in FIG. 1, in which a waist elastic elastic member is arranged in a predetermined region, taken along line XX ′ in FIG. In the figure, a waist elastic elastic member 13 is arranged between the back sheet 15 and the absorber 8.

[0017]

According to the pants-type disposable diaper of the present invention, the elastic elastic member is continuously arranged along the waist in a predetermined region of the front body corresponding to the waist of the wearer when worn. . In addition, these stretchable elastic members have a predetermined area limited so that both ends of the stretchable elastic member are arranged at the joint portion of the front body and the back body between the waist opening and the both leg openings. It is provided only in
It is arranged only in the minimum area necessary to maintain the close contact with the wearer of the diaper during wearing and to prevent the diaper from slipping off during wearing.

The arrangement in the predetermined region shown in the present invention is sufficient for suppressing various movements of the body of the worn diaper and displacement due to the weight of the diaper itself, and maintaining the conformability to the body. However, this is especially between the waist opening and the legs opening of the front body of the diaper corresponding to the elastic elastic member around the waist, and both ends of the elastic elastic member of the front body and the back body. Only by arranging it only in a predetermined area that is located at the joint portion, the elastic elastic member can provide an appropriate tightening action in the widest area having the most irregularity along the waist area from the abdomen, and the absorbent body also has an appropriate effect. Since the close contact can be maintained, the followability to the wearer of the diaper is maintained. Further, in the present invention, the elastic elastic member arranged around the waist is limited to a predetermined area only on the front body and is a minimum necessary area only for obtaining the followability to the wearer of the diaper, so that the diaper is manufactured. Since the number of the elements in (1) can be suppressed and the process can be simplified, it is also effective in achieving the purpose of mass production at low cost necessary for all used articles.

[0019]

[Brief description of the drawings]

FIG. 1 is a perspective view of a pants-type disposable diaper of the present invention viewed from the side of the front body.

FIG. 2 is a perspective view showing a state in which side seams of the pants-type diaper shown in FIG. 1 are opened.

FIG. 3 is a cross-sectional view of the pants-type diaper shown in FIG. 2 in which a waist elastic elastic member is arranged on a surface sheet, taken along line XX ′.

4 is a cross-sectional view of the pants-type diaper shown in FIG. 2 in which a waist elastic elastic member is arranged on a back sheet, taken along line XX ′.

[Explanation of symbols]

 1: Pants-type disposable diaper 2: Opening around the legs 3: Opening around the waist 4: Front body 5: Back body 6: Side seams 7: Side flaps 8: Absorbers 9 and 10: Elastic components around legs 11, 12: waist elastic elastic member 13: waist elastic elastic member 14: surface sheet 15: back sheet

Claims (1)

[Claims] 1. A front body located on the ventral side of the wearer and a back of the wearer, comprising a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent body disposed between these sheets. Pants-type disposable diaper that is formed by joining both side edges extending from the rear body located on the side, has an opening around the waist and both legs, and an elastic elastic member is arranged along the opening. In a pant-type use, a waist-like elastic elastic member around the waist is continuously arranged along the waist in a predetermined area of the front sheet or the back sheet of the front body. Diaper. [0001]