JP3749855B2 - Pants-type disposable diaper and method for producing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pants-type disposable diaper. It is related with improvement of the underpants type disposable diaper which fractures | disconnects and discards the adhesion part of the side part of the front and back body area especially after use.
[0002]
[Prior art]
Conventionally, a pants-type disposable diaper has a structure in which both side portions can be broken so that it can be removed while standing. When manufacturing such a diaper, for example, a long diaper base material for continuously manufacturing a plurality of diapers is prepared; a waist opening and a pair of legs around a diaper base material flowing in a certain direction An elastic material (such as rubber) is continuously bonded along the flow direction at a position corresponding to the opening. Then, the front body region and the back body region are overlapped on the diaper base material, and the positions corresponding to the left and right side portions of the front and back body regions are bonded to form an adhesive portion. Then, it cut | disconnects into each diaper by cut | disconnecting between adjacent adhesion parts.
[0003]
When taking off the pants-type diaper as described above, the diaper main body is broken so that the adhesive part is peeled off at one or both of the left and right side parts.
[0004]
[Problems to be solved by the invention]
However, in the conventional diaper as described above, the adhesive part (seal part) is easily peeled off when the side part is broken, but an elastic member such as rubber may remain without being cut. As a result, when the front and back bodies are pulled apart, the rubber stretches and tears, and the bounced rubber hits the hand.
[0005]
The present invention has been made in view of the above situation, and provides a pants-type disposable diaper capable of preventing the elastic member from being inadvertently bounced and hitting the hand when the side part of the diaper is broken. With the goal.
[0006]
[Means for Solving the Problems]
The pants-type disposable diaper according to claim 1 forms a waist opening and a pair of leg-hole openings by adhering a front body area and a rear body area on both right and left sides, and after use, A pants-type disposable diaper that breaks and discards the bonded portion. The diaper includes: a waist elastic member extending in a direction around the waist at an upper edge of the waist opening; and a leg periphery elastic member extending in a direction around the leg at an edge of the leg opening. Is provided. The elastic members around the waist and legs reach the outermost edge of the side portion. A first seal that does not cut the elastic member around the waist and the legs and a second seal that cuts the elastic member outside the first seal are formed on the left and right sides.
[0007]
According to a second aspect of the present invention, the first seal is configured by arranging a plurality of unit patterns along the side portion in the flow direction in which the elastic member around the waist extends, and each unit pattern The angle with respect to the flow direction is 5 to 30 °.
[0008]
According to a third aspect of the present invention, the width of each unit pattern constituting the first seal is 0.5 to 3.0 mm.
[0009]
According to the invention of claim 4, the second seal is a plurality of unit patterns that are long in the flow direction and are arranged along the side portions, and an angle of each unit pattern with respect to the flow direction is set. 30 to 75 °.
[0010]
According to invention of Claim 5, the width | variety of each said unit pattern which comprises a said 2nd seal is 0.1-0.5 mm.
[0011]
According to a sixth aspect of the present invention, the maximum distance between the first and second seals is 5 mm or less.
[0012]
According to invention of Claim 7, the sealing strength of the said adhesion part is 8-40 N / 25mm.
[0013]
The invention according to claim 8 forms a waist opening and a pair of leg-hole openings by bonding the front body area and the back body area at the left and right sides, and breaks the bonding part of the front and back bodies after use. The method of manufacturing pants-type disposable diapers to be discarded. And according to the said method, the elongate diaper base material for manufacturing a several diaper continuously is prepared; with respect to the said diaper base material which flows into a fixed direction, the said waist opening and a pair of leg periphery opening The elastic material is continuously adhered along the flow direction at a position corresponding to the above; the front body region and the back body region are overlapped on the diaper base material, and the left and right sides of the front and back body regions are overlapped. Forming the adhesive part by bonding corresponding positions; dividing the diaper by cutting between adjacent adhesive parts; and forming the adhesive part along the side part; A first seal that does not cut the member and a second seal that cuts the elastic member outside the first seal are formed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The pants-type disposable diaper according to the present invention forms a waist opening and a pair of leg-hole openings by bonding the front body area and the back body area at the left and right side parts, and the adhesive part of the front and back body areas after use Applies to pants-type disposable diapers that break and discard.
[0015]
FIG. 1 is a perspective view showing a configuration of a pants-type disposable diaper 10 according to a first embodiment of the present invention, and shows a state seen from the front body 26 side. FIG. 2 is a perspective view showing the configuration of the diaper 10 according to the first embodiment, and shows a state viewed from the side of the side adhesive portion 30. The diaper 10 of a present Example is provided with the liquid-permeable surface sheet which contact | connects a wearer's skin, the liquid-impermeable back sheet provided in the outer side of the diaper 10, and the absorptive core 16 which absorbs a bodily fluid. ing. Basically, a diaper main body is constituted by the top sheet, the back sheet, and the absorbent core 16.
[0016]
The surface sheet has a structure in which the body fluid excreted therein is quickly guided to the absorbent core 16, and the body fluid once absorbed by the absorbent core 16 is less likely to flow back to the skin contact surface of the surface sheet. For example, a non-woven fabric subjected to hydrophilic treatment or a plastic film provided with a large number of holes is used. The back sheet can be constituted by a liquid film impervious plastic film or non-woven fabric, or a laminate with a plastic film or non-woven fabric. The absorptive core 16 is formed from hydrophilic fibers or hydrophilic fibers or superabsorbent polymer particles. Moreover, you may mix a thermoplastic synthetic fiber. Here, examples of the hydrophilic fiber include pulverized pulp and rayon.
[0017]
A waist opening 12 is formed at a portion corresponding to the wearer's waist, and a leg opening 14 is formed at a portion corresponding to the circumference of the leg. In addition, a long elastic member 18 a is bonded to the edge of the waist opening 12 in a stretched state by a hot melt adhesive to form a waist gather 18. Similarly, a long elastic member is bonded to the edge of the leg opening 14 in a stretched state by a hot melt adhesive to form a leg gather 20. Here, due to the manufacturing method described later, the elastic member 18a bonded to the waist opening 12 reaches the outermost edges of the left and right sides. In addition, the elastic member bonded to the leg opening 14 is formed and arranged endlessly.
[0018]
The front body area 26 and the back body area 28 are heat-sealed at the left and right side portions to form a backrest portion 30. FIG. 3 is a plan view showing the seal patterns 32 and 34 of the bonding part 30 of the diaper 10 according to the first embodiment, and FIG. 4 is an explanatory diagram showing the detailed sizes and angles of the seal patterns 32 and 34. is there. 3 and 4, only the periphery of the waist opening 21 is shown, but it is preferable that the periphery of the leg opening 14 has the same structure.
[0019]
The bonding portion 30 includes a first seal 32 that does not cut the elastic member 18 a and a second seal 34 that cuts the elastic member outside the first seal 32. Although not shown for convenience of explanation, a waistline elastic member extending in the lateral direction (the waistline direction) may be provided between the left and right adhesive portions 30 in order to improve fit.
[0020]
When manufacturing the pants-type disposable diaper 10 according to the present embodiment, a long diaper base material for continuously manufacturing a plurality of diapers is prepared; for a diaper base material flowing in a certain direction (MD direction) The elastic material 18a is continuously bonded along the flow direction at positions corresponding to the waist opening 12 and the pair of leg opening 14. Next, the front body region and the back body region are overlapped on the diaper base material, and the positions corresponding to the left and right side portions of the front and back body regions are heat-sealed to form the bonding part 30. Then, it divides | segments into each diaper by cut | disconnecting between the adjacent adhesion parts 30. FIG.
[0021]
As shown in FIG. 4, the first seal 32 is a plurality of unit patterns that are long in the flow direction and are arranged along the side portions. The angle θ1 of each unit pattern with respect to the flow direction is 5 to 30 °. . Here, when the angle θ1 is 5 ° or less, it is difficult to hold the elastic member with the seal 32. On the other hand, when the angle is 30 ° or more, there is a high possibility that the seal pattern 32 cuts the elastic member. In addition, it is preferable that the width W1 of each unit pattern shall be 0.5-3.0 mm.
[0022]
The second seal 34 is provided with a plurality of unit patterns that are long in the flow direction along the side portions, and the angle θ2 with respect to the flow direction of each unit pattern is set to 30 to 75 °. Here, when the angle θ2 is 30 ° or less, it is difficult to cut the elastic member 18a. On the other hand, when it is 75 ° or more, the adhesive force becomes excessive, and it is difficult to break the side portions. Note that the width W2 of each unit pattern is preferably 0.1 to 0.5 mm.
[0023]
The maximum distance D between the first and second seals 32 and 34 is 5 mm or less. When the distance is 5 mm or more, the length of the elastic member 18a remaining when the adhesive portion 30 is broken increases, and the elastic member 18a that has bounced back may hit the hand.
[0024]
The sealing strength of the entire bonded portion 30 is preferably 8 to 40 N / 25 mm. If the seal strength is 8 N / 25 mm or less, there is a possibility of peeling during use. On the other hand, when the seal strength is 40 N / 25 mm or more, it is difficult to break the bonded portion.
[0025]
5-7 is a top view which shows the seal pattern of the adhesion part of the diaper which concerns on the 2nd, 3rd and 4th Example of this invention. In the seal pattern according to the second embodiment shown in FIG. 5, the second seal 34 is continuous. In the seal pattern according to the third embodiment shown in FIG. 6, the unit seal patterns constituting the second seal 34 are arranged in parallel. In the seal pattern according to the third embodiment shown in FIG. 7, the second seal 34 is continuous and is in proximity to or in contact with the first seal pattern 32.
[0026]
Although the embodiment of the present invention has been described above, the present invention is not limited to this, and it is needless to say that the design can be changed as appropriate within the scope of the technical idea indicated in the claims. .
[0027]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent the elastic member from inadvertently rebounding and hitting the hand when the side part of the diaper is broken.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a pants-type disposable diaper according to a first embodiment of the present invention, and shows a state seen from a front body side.
FIG. 2 is a perspective view showing the configuration of the diaper according to the first embodiment, and shows a state as viewed from the side of the adhesive portion on the side.
FIG. 3 is a plan view showing a seal pattern of an adhesive part of the diaper according to the first embodiment.
FIG. 4 is an explanatory diagram showing the detailed size and angle of the seal pattern of the bonded part of the diaper according to the first embodiment.
FIG. 5 is a plan view showing a seal pattern of an adhesive part of a diaper according to a second embodiment of the present invention.
FIG. 6 is a plan view showing a seal pattern of an adhesive part of a diaper according to a third embodiment of the present invention.
FIG. 7 is a plan view showing a seal pattern of an adhesive portion of a diaper according to a fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Pants type disposable diaper 12 Waist opening part 14 Leg opening part 16 Absorbent core 18 Waist gather 18a Waist elastic member 20 Leg gather 30 Adhesion part 32 1st seal 34 2nd seal

Claims (10)

A pants-type disposable diaper that forms a waist opening and a pair of leg openings by bonding the front body area and the back body area on the left and right sides, and breaks and discards the front and back body area adhesive sections after use In
A waist elastic member extending in a direction around the waist at the upper edge of the waist opening;
A leg elastic member extending in the leg circumference direction at the edge of the leg circumference opening;
The waist circumference and leg circumference elastic members reach the outermost edge of the side part,
The left and right sides are formed with a first seal that does not cut the elastic member around the waist and legs, and a second seal that cuts the elastic member outside the first seal,
The first seal is configured by arranging a plurality of unit patterns that are long in the flow direction in which the elastic member around the waist extends along the side portions, and an angle of each unit pattern with respect to the flow direction is 5 to 30 °. And
The second seal includes a plurality of unit patterns that are long in the flow direction along the side portions, and an angle of each unit pattern with respect to the flow direction is 30 to 75 °. Pants-type disposable diaper. Pants type disposable diaper according to claim 1, the width of each of the unit patterns forming the first seal is characterized in that it is a 0.5 to 3.0 mm. The pants-type disposable diaper according to claim 1 or 2 , wherein the width of each unit pattern constituting the second seal is 0.1 to 0.5 mm. The pants-type disposable diaper according to claim 1, 2, or 3 , wherein a maximum distance between the first and second seals is 5 mm or less. The pants-type disposable diaper according to claim 1, 2, 3, or 4 , wherein the adhesive portion has a seal strength of 8 to 40 N / 25 mm. A pants-type disposable diaper that forms a waist opening and a pair of leg-hole openings by bonding the front body area and the back body area on the left and right sides, and breaks and discards the front and rear body bonding parts after use In the manufacturing method,
Prepare a long diaper base material for continuous production of multiple diapers;
An elastic material is continuously bonded to the diaper base material flowing in a certain direction along the flow direction at positions corresponding to the waist opening and the pair of leg opening;
On the diaper base material, the front body region and the back body region are overlapped, and the positions corresponding to the left and right side portions of the front and back body regions are adhered to form the adhesive part;
Dividing into individual diapers by cutting between the adhering parts adjacent to each other;
In forming the adhesive portion along the side portion, forming a first seal without cutting the elastic member, and a second seal for cutting the elastic member in the outside of the first seal Including
The first seal is configured by arranging a plurality of unit patterns that are long in the flow direction in which the elastic member around the waist extends along the side portions, and an angle of the unit pattern with respect to the flow direction is 5 to 30 °. age,
The second seal has a configuration in which a plurality of unit patterns long in the flow direction are arranged along the side portions, and an angle of each unit pattern with respect to the flow direction is 30 to 75 °. Type disposable diaper manufacturing method.   The width of each said unit pattern which comprises said 1st seal | sticker is 0.5-3.0 mm, The manufacturing method of the underpants type disposable diaper of Claim 6 characterized by the above-mentioned.   9. The method for producing a pants-type disposable diaper according to claim 7, wherein a width of each unit pattern constituting the second seal is 0.1 to 0.5 mm.   The method for producing a pants-type disposable diaper according to claim 6, 7 or 8, wherein the maximum distance between the first and second seals is 5 mm or less.   The method for producing a pants-type disposable diaper according to claim 6, 7, 8, 9, or 10, wherein the adhesive portion has a seal strength of 8 to 40 N / 25 mm.

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