JP4246839B2 - Disposable pants - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable pant that feels soft and improves the feeling of wearing.
[0002]
[Prior art]
Conventionally, as disposable pants, leg hole portions are formed on both sides of the crotch portion between the front abdomen and the back part in the unfolded state by a nonwoven fabric or the like, and elastic waist waist yarn and body are formed on the front part and the back part. The elastic yarn for fit gather is joined in the stretched state, the elastic yarn for leg gather is joined in the stretched state around the leg hole, and the front abdomen and the back part are overlapped around the crotch, There has been proposed one in which both end portions of the abdomen and the back portion are joined together.
[0003]
If the absorbent body is attached to the skin side of the crotch, the disposable pants as described above become disposable pants that also serve as a diaper for light incontinence.
[0004]
[Problems to be solved by the invention]
By the way, the elastic yarn for waist gathers, the elastic yarn for body fit gathers, and the elastic yarn for leg gathers are bonded to the nonwoven fabric or the like in a stretched state by a hot melt adhesive applied to the nonwoven fabric or the like (or applied to the elastic yarn). ing. For this reason, a large amount of hot melt adhesive must be applied so that the elastic yarn does not fall out due to contraction force, so that the overall texture of the disposable pants becomes hard and the wearing feeling is impaired. There was a problem that the amount increased and the cost increased.
[0005]
The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a disposable pant that can be manufactured at a low cost while improving the wearing feeling and the feeling of wearing.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention has a leg hole portion formed on both sides of the crotch portion between the front abdomen and the back portion in the deployed state, and a waist gather elastic yarn on the front abdomen and the back portion. The elastic yarn for body fit gather is joined in an expanded state, the elastic yarn for leg gather is joined in an elongated state around the leg hole, and the front abdomen and the back part are overlapped around the crotch part, Disposable pants in which both ends of the front abdomen and the back part are joined,
The ends of the elastic yarn at both ends of the joint are pressed and joined with an elastic yarn fastening pattern continuous in the longitudinal direction to provide disposable pants.
[0007]
According to the present invention, since the ends of the elastic yarns at both ends of the front part and the back part of the front part are pressed and joined by the elastic threading pattern continuous in the longitudinal direction, all the ends of the elastic yarns are joined. With the elastic thread stopper pattern, the elastic thread is pressed and joined so as not to come off due to the contraction force.
[0008]
According to a second aspect of the present invention, the inside of the joining both ends can be joined with a horizontal bar-type side joining pattern, and the outside can be joined with an elastic threading pattern continuous in the vertical direction. Note that both ends can be joined only with the outer elastic threading pattern.
[0009]
As described in claim 3, the elastic thread fastening pattern can be selected from any of the S-shaped continuous type, the vertical line type, the diagonal line type, and the pattern continuous type.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0011]
1A is a front view of the disposable pants 2, FIG. 1B is an enlarged sectional view taken along line AA of FIG. 1A, and FIG. 1C is an enlarged view of a joining end portion of FIG. FIG. 1 (a) is a diagram when each elastic yarn 7, 8, 9 described later is in an expanded state. Actually, gathers are formed on the disposable pants 2 by contraction of each elastic yarn 7-9. It is formed and it contracts three-dimensionally.
[0012]
As shown in FIG. 3, the disposable pants 2 basically have a liquid-permeable sheet-like body 3 on the outer surface side, a liquid-permeable sheet-like body 4 on the skin surface side, a single absorbent body 5, and Manufactured with a pair of end pressing sheet-like bodies 6 and respective elastic yarns 7, 8, 9.
[0013]
The liquid-permeable sheet-like body 3 on the outer surface side is a non-woven fabric made of a synthetic fiber having a good texture, and extends in the length direction L as shown in FIG. The width is set so that the back part 2B and the crotch part 2C are molded side by side in the length direction of the liquid-permeable sheet-like body 3 in the unfolded state.
[0014]
Specifically, with respect to the length direction L of the liquid-permeable sheet-like body 3, a pitch P corresponding to the lateral width of the front abdomen 2A, the crotch 2C, and the back part 2B is set. Every time, the disposable pants 2 continuously manufactured in the length direction L are cut off by cutting both at the both-direction disconnection line K in the step of FIG. 7 to be described later. In addition, on both sides in the width direction of the liquid-permeable sheet 3, folded portions 3a are formed for folding inwardly at a folded line r (see a two-dot chain line).
[0015]
The liquid permeable sheet-like body 3 is formed with oblong leg holes 2D each having an oblong shape centering on an intersection H between the center line G in the width direction and the two broken lines K.
[0016]
A plurality of waist elastic yarns 7 are intermittently bonded to the waist positions of the front abdominal portion 2A and the back portion 2B of the liquid-permeable sheet 3 in a stretched state in the length direction. The body fit elastic yarns 9 are intermittently bonded in an extended state in the length direction, and a plurality of leg elastic yarns 8 are intermittently bonded around the leg hole portion 2D.
[0017]
The leg elastic yarn 8 around the leg hole portion 2D is intermittently bonded in a meandering manner while the upper leg elastic yarn 8 in FIG. 4 does not cross the center line G in the width direction of the crotch portion 2C while making a U-turn. At the same time, the lower leg elastic yarn 8 is intermittently bonded in a meandering state while making a U-turn without exceeding the center line G in the width direction of the crotch 2C. Each leg elastic yarn 8 intermittently bonded to the crotch portion 2C may be cut to separate the left and right leg hole portions 2D.
[0018]
The elastic yarn 7 for the waist, the elastic yarn 8 for the leg, and the elastic yarn 9 for the body fit are natural rubber or synthetic rubber in the form of a band or thread, and the gathering for the waist and the gather for the leg by the contraction force of each elastic yarn 7-9. And body fit gathers are naturally formed.
[0019]
The skin-side liquid-permeable sheet-like body 4 is a synthetic fiber nonwoven fabric or the like and extends in the length direction L as shown in FIG. Similarly, each leg hole 2D is formed. In addition, the folding | returning part 3a like the said liquid-permeable sheet-like body 3 is not formed.
[0020]
The skin-side liquid-permeable sheet-like body 4 is set so as to be positioned between the folded portions 3a on both sides of the outer-surface-side liquid-permeable sheet-like body 3, and the elastic yarns 7 to 9 are intermittently bonded. The liquid-permeable sheet-like body 3 on the outer surface side is joined by welding or adhesion while being covered from above.
[0021]
After this joining step, the rectangular absorbent body 5 is joined to the crotch portion 2C of the liquid-permeable sheet-like body 4 on the skin surface side. As shown in FIG. 3, the absorbent body 5 is composed of a liquid-impervious back sheet 5a and a liquid-permeable top sheet 5b, and an absorbent core 5c made of a mixture of pulp fibers, a superabsorbent polymer, or the like. Wrapped flat. In addition, you may make it provide the solid nonwoven fabric (cuff) for side leakage prevention on both sides of the upper surface of the top sheet 5b of the said absorber 5. FIG.
[0022]
The pair of end pressing sheet-like bodies 6 is a synthetic fiber nonwoven fabric or the like, and extends in the length direction L as shown in FIG. 3, and the front end portion 5d and the rear end portion 5e of the absorbent body 5 are formed. And hold each.
[0023]
And after joining this end press sheet | seat-like body 6 to the front abdominal part 2A and back part 2C of the said liquid-permeable sheet-like body 4 of the said skin surface by welding or adhesion | attachment, as shown in FIG. The folded portion 3a of the liquid sheet 3 is folded inward along the folding line r and joined to the end pressing sheet 6 by welding or adhesion.
[0024]
After such a joining step, as shown in FIG. 7, the front abdominal part 2A and the back part 2B are overlapped around the center line G in the width direction of each sheet-like body 3, 4, that is, the crotch part 2C. At the same time, both end joining (side seal) portions 2c at the positions of both broken lines K of the pitch P are joined to each other by welding or bonding with a predetermined width.
[0025]
Then, the joint pants 2 that are continuously manufactured in the length direction L are cut off one by one as shown in FIG. Become.
[0026]
When joining the joining both end portions 2c, as shown in detail in FIG. 1C, the inside of the joining both end portions 2c is joined by a side-bar type side joining pattern 10 similar to the conventional one. Since this horizontal bar-type side joining pattern 10 is not continuous in the vertical direction, all of the end portions of the elastic yarns 7 to 9 are pressed and joined so that the elastic yarn does not come off due to contraction force. Not exclusively.
[0027]
Therefore, the outer sides of the joining end portions 2c are pressed and joined by the elastic threading patterns 11 (A to D) continuous in the vertical direction. Note that both ends can be joined only by the outer elastic thread fastening pattern 11 (A to D), but in order to improve the reliability of joining, it is used together with the joining of the inner side bar type side joining pattern 10. It is preferable to do this.
[0028]
As the elastic thread stopper pattern 11 continuous in the vertical direction, the S-shaped continuous type 11 (A) continuous while overlapping in the vertical direction as shown in FIG. As shown in FIG. 2B, the diagonal line shape 11 (B) is continuous while overlapping in the vertical direction, and the vertical line shape 11 (C) is overlapped in the vertical direction as shown in FIG. 2C. However, it is possible to select any one of the continuous pattern continuous type 11 (D). Needless to say, the elastic thread fastening patterns 11 (A to D) are not limited to these examples.
[0029]
Further, as shown in FIG. 2D, only the body fit gather elastic yarn 9 is pressed and joined with the elastic yarn fastening pattern 11 to join the waist gather elastic yarn 7 and the leg gather elastic yarn 8. These portions may be joined by extending the inner side bar-type side joining pattern 10 outward.
[0030]
As described above, the end portions of the elastic yarns 7 to 9 of the joining both end portions 2c of the front abdominal portion 2A and the back portion 2B are used in combination with the joining by the inner side bar-shaped side joining pattern 10, and the outer elastic yarn By pressing and joining with the retaining patterns 11 (A to D), all of the ends of the elastic yarns 7 to 9 are all elasticized by the elastic thread retaining patterns 11 (A to D), and the elastic yarns 7 to 9 are contracted. It is pressed and joined so as not to come off.
[0031]
Thereby, since the application amount of the hot melt adhesive of the elastic yarns 7 to 9 that adhere to the liquid-permeable sheet-like body 3 or the like on the outer surface side can be greatly reduced, the texture of the disposable pants 2 becomes flexible. As a result, the feeling of wearing is improved, and the amount of hot melt adhesive used is reduced, so that it can be manufactured at low cost.
[0032]
In the above embodiment, the absorbent body 5 is joined to the crotch 2C because the disposable pant 2 is a diaper for infants and adult incontinent persons. However, the absorbent body 5 is not a diaper, for example, as a disposable pant for travel. When using, it is not necessary to join the absorber 5. Thus, versatility improves because it can be diverted as a disposable pants for travel.
[0033]
【The invention's effect】
As is clear from the above description, the present invention is joined by pressing the elastic yarn end portions of the joint portions of the front abdomen and the back portion with a continuous elastic yarn fastening pattern in the longitudinal direction. All ends of the elastic yarn are joined by pressing the elastic yarn so that the elastic yarn does not come out with contraction force, so the amount of hot melt adhesive applied to the nonwoven fabric etc. Can be greatly reduced. As a result, the texture of the disposable pants becomes flexible and the feeling of wearing is improved, and the amount of hot melt adhesive used is reduced, so that it can be manufactured at low cost.
[Brief description of the drawings]
1 is a disposable pant of the present invention, (a) is a front view, (b) is an enlarged cross-sectional view along line AA in (a), and (c) is an enlarged view of both ends of the joint in (a). is there.
FIGS. 2A to 2D are enlarged views of both ends of a joint showing examples of elastic thread fastening patterns, respectively.
FIG. 3 is an exploded perspective view of parts of disposable pants.
FIG. 4 is a plan view of a liquid-permeable sheet-like body on the outer surface side.
FIG. 5 is a plan view of a liquid-permeable sheet-like body on the skin surface side.
FIG. 6 is a plan view of joined sheet-like bodies.
FIG. 7 is a plan view before the continuously manufactured disposable pants are cut off.
[Explanation of symbols]
2 Disposable pants 2A Front abdominal part 2B Rear back part 2C Crotch part 2D Leg hole part 3 Liquid-permeable sheet-like body 4 on the outer surface side Liquid-permeable sheet-like body 5 on the skin surface side Absorbers 7, 8, 9 Elastic thread 10 Side joint Pattern 11 (AD) Elastic thread fastening pattern

Claims (2)

Leg holes are formed on both sides of the crotch between the front and back in the unfolded state, and elastic waist waist yarn and body fit elastic yarn are joined in the stretched state to the front and back portions. The elastic yarn for leg gathers is joined around the leg hole part in an extended state, the front part and the back part are overlapped with each other centering on the crotch part, and both ends of the front part and the back part are joined together. Disposable pants
End of the elastic yarn of the joint both ends, with the inner is welded side bonding pattern of bars type, it is welded pressed outside of the elastic yarn stop patterns continuous in the longitudinal direction, and,
Disposable pants characterized in that the inner side joining pattern and the outer elastic thread fastening pattern are provided apart from each other without contacting or intersecting with each other. The disposable pants according to claim 1, wherein the outer elastic yarn stop pattern is diagonal Me line type.

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