JP3907289B2 - Pants-type disposable diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pants-type disposable diaper having an excellent texture and an excellent wearing feeling.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, it comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets, and the left and right side edges and the back side of the ventral part. A pair of left and right side joining portions are formed by joining the left and right side edge portions, and a waist portion elastic member, a waist portion elastic member and a leg portion elastic member are respectively formed on the waist portion, the waist portion and the leg portion. A pants-type disposable diaper, which is arranged so that its end edge is positioned at the joint, is widely used.
And the said junction part was normally joined by heat-sealing the left-right both-sides edge part of a ventral part, and the right-and-left both-sides edge part of a back side part.
However, in such a conventional pants-type disposable diaper, the above-mentioned joint becomes hard, and the texture and feeling of use are bad. Specifically, when the wearer hits the joint during use There were problems such as feeling painful.
[0003]
Accordingly, an object of the present invention is to provide a pants-type disposable diaper that has an excellent texture and a good wearing feeling during use.
[0004]
[Means for Solving the Problems]
As a result of intensive studies to solve the above-described problems, the present inventors have developed a pants-type disposable diaper that does not fix the elastic member at the joint so that the elastic member positioned at the joint is in an unstretched state. It has been found that the above object can be achieved.
[0005]
The present invention has been made on the basis of the above knowledge, and includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets. A pair of left and right joints are formed by joining the left and right side edges of the side part and the right and left side edges of the back side part, and a waist part elastic member and a waist part are respectively formed in the waist part, the waist part and the leg part. In the pants-type disposable diaper, in which a waist elastic member, a leg elastic member, and a leg are provided, wherein a waist elastic member, a leg elastic member, and a leg elastic member are disposed at the joint portion. Each of the partial elastic members provides a pants-type disposable diaper characterized in that the pair of joint portions are in an unstretched state.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to the drawings.
Here, FIG. 1 is a perspective view showing one form of the pants-type disposable diaper of the present invention, and FIG. 2 is an enlarged view schematically showing a joint portion of the pants-type disposable diaper shown in FIG. .
FIG. 3 is a schematic view showing a main part of the method for producing the pants-type disposable diaper shown in FIG.
[0007]
A pants-type disposable diaper 1 shown in FIG. 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-retaining absorbent 4 interposed between the sheets 2 and 3 (see FIG. 1). 4), and a pair of left and right joints 8 are formed by joining the left and right side edges of the ventral side A and the left and right side edges of the back side B, and a waist part 5 and a waistline part. 6 and the leg portion 7 are respectively provided with a waist elastic member 51, a waistline elastic member 61 and a leg elastic member 71, and both end edges 51 a, 61 a and 71 a are connected to the joint 8. positioned.
[0008]
The disposable diaper 1 is formed with a waist opening 9a and a pair of left and right leg openings 9b by forming the joint.
[0009]
Four waist elastic members 51 are provided along the waist opening 9a in the waist portion 5, and seven waist elastic members 61 are provided on the waist portion 6 located around the wearer's waist when worn. Is provided. Further, three leg part elastic members 71 are arranged on each of the abdomen side A side and the back side part B side.
The waist elastic member 51, the leg elastic member 71, and the waist elastic member 61 are disposed between the top sheet 2 and the back sheet 3, respectively.
Such a structure is the same as that of a conventionally known pants-type disposable diaper.
[0010]
Moreover, about each member used in this form, ie, the top sheet 2, the back sheet 3, the absorber 4, the waist elastic member 51, the leg elastic member 71, and the waist elastic member 61, However, it can be formed without any particular limitation on those conventionally used as the forming material.
[0011]
Thus, as shown in FIGS. 1 and 2, the disposable diaper 1 according to the present embodiment includes the waist elastic member 51, the waistline elastic member 61, and the leg elastic member 71, respectively. In FIG. 8, it is in a non-expanded state.
[0012]
More specifically, as shown in FIG. 2, the joint portion 8 is formed by being joined by a plurality of seal portions 81 provided in the longitudinal direction and the horizontal direction of the joint portion 8. The seal portions 81 are discontinuously provided in parallel and with a predetermined pattern.
[0013]
In the present embodiment, no adhesive is applied between the top sheet 2 and the back sheet 3 at the joint 8, whereby the elastic members 51, 61, 71 is not fixed to either the top sheet or the back sheet, and is in an unstretched state. It should be noted that the non-stretched state can be achieved by applying a release agent to the portions of the top sheet and the back sheet that form the joints and performing a release treatment.
Here, the “non-stretched state” refers to a state in which each elastic member is not stretched and the stretch rate is close to 0%, specifically 0 to 20%.
The “stretch rate” is a ratio of the length of the stretched portion to the natural length. For example, when a 10 cm length is stretched to 20 cm, the stretch rate is 100%.
[0014]
The pants-type disposable diaper of this embodiment can be used in the same manner as a commonly known pants-type disposable diaper. And if it is the conventional disposable diaper, this joint part will become wrinkled by the shrinkage | contraction of the elastic member in a junction part, and the fall of a remarkable texture will be caused, but in the disposable diaper of this form, locations other than the junction part 8 are each elastic. The members 51, 61, 71 are each clamped and fixed to the top sheet and the back sheet via an adhesive in an expanded state, but the elastic members 51, 61, 71 are in an unstretched state at the joint 8. Therefore, the joint 8 has no adverse effect due to the shrinkage and does not cause such a decrease in texture. Therefore, the disposable diaper of this embodiment is excellent in texture and excellent in wearing feeling.
[0015]
The disposable diaper of this embodiment can be preferably manufactured as follows.
That is, as shown in FIG. 3, the waist elastic member 51, the waistline elastic member 61, the leg elastic member 71 and the absorber 4 are sandwiched between the top sheet 2 and the back sheet 3, respectively. Waist elastic member continuum 51 ′, waistline elastic member continuum 61 ′, leg elastic member continuum 71 ′ and absorber 4 between top sheet continuum 2 ′ and backsheet continuum 3 ′. A member arranging step O for forming the opening, an opening forming step P for forming the opening for forming the leg opening, and a continuous body in which the respective members are overlapped and formed with the opening is folded in two in the width direction, and a predetermined position is obtained. Performing a joint forming step Q for forming a joint by heat-sealing so that a plurality of the seals are formed in a predetermined pattern, and a cutting step R for cutting into individual diapers at the joint To produce It is possible.
[0016]
Further, in this embodiment, the left and right side edges 3a ′ of the backsheet continuum 3 ′ are folded back and overlapped on the topsheet continuum 2 ′ between the member arranging step O and the opening forming step P. The folding step S can be performed.
Moreover, the said junction part formation process R, the opening formation process P, the folding process Q, and the folding process S can each be performed according to a conventional method. In addition, the said predetermined location is a location which hits the right and left both-sides edge part of a diaper, ie, the narrowest part in the continuous body folded in half. Further, the predetermined pattern is, for example, an arrangement pattern of each seal portion shown in FIG.
[0017]
In this embodiment, the member arranging step O is performed by performing the top sheet continuous body 2 ′, the back sheet continuous body 3 ′, the waist elastic member continuous body 51 ′, and the waistline elastic member. In the continuum 61 ′ and the continuum 71 ′ of the leg elastic member, the adhesive is intermittently applied to each member so that the adhesive is not applied to the portion where the joint is formed in the diaper. This is done by arranging the members. At this time, as a method for applying the adhesive intermittently, a known method can be used without any particular limitation. Further, when each elastic member is brought into a non-stretched state by the peeling process, for example, the above-described top sheet continuous body 2 ′ and the back sheet continuous body 3 are not applied without applying the above-described intermittent adhesive. The member disposing step O can be performed by applying a release agent to a portion where the above-described joint portion is to be formed.
Subsequently, after performing the said folding | returning process S and the said opening formation process P, the said junction part formation process Q is performed, and a junction part is formed.
Further, after that, in the cutting step R, in order to cut the stretched elastic member at a place where the elastic member is not bonded (part where the joint portion is formed in each disposable diaper), the continuous body of the elastic members is bonded. In the non-joined part, each elastic member 51, 61, 71 contracts and becomes a non-expanded state, the joined part is formed, and individual disposable diapers are obtained.
[0018]
In addition, the disposable diaper of this invention is not restrict | limited to the above-mentioned form, A various change is possible in the range which does not deviate from the meaning of this invention.
For example, the waist elastic member 51, the waistline elastic member 61, and the leg elastic member 71 do not have to be sandwiched between the top sheet 2 and the back sheet 3, respectively. It may be sandwiched and fixed between the layers of the backsheet made of the body. Further, the top sheet may not be up to the joint.
[0019]
【The invention's effect】
The pants-type disposable diaper of the present invention has an excellent texture and a good wearing feeling during use.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of a pants-type disposable diaper according to the present invention.
FIG. 2 is an enlarged view schematically showing a joint portion of the pants-type disposable diaper shown in FIG. 1;
FIG. 3 is a schematic view showing a main part of the method for manufacturing the pants-type disposable diaper shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Waist part 6 Girth part 7 Leg part 8 Joint part 51 Waist part elastic member 61 Girth part elastic member 71 Leg part elastic member 81 Sheet part A Abdominal side part B Back side part

Claims (1)

It comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the two sheets, and the left and right side edges of the ventral side and the left and right sides of the back side A pair of left and right joints are formed by joining the edges, and a waist part elastic member, a waist part elastic member and a leg part elastic member are arranged on the waist part, the waist part and the leg part, respectively. In these pants-type disposable diapers, where both end edges are located at the joint,
The pants-type disposable diaper characterized in that the waist elastic member, the waistline elastic member, and the leg elastic member are in an unstretched state at the pair of joint portions, respectively.

Images