JP4456302B2 - Pants-type disposable diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pants-type disposable diaper to which a tape fastener for rounding and disposal after use is attached.
[0002]
[Prior art]
Japanese Utility Model Laid-Open No. 6-77722 discloses a liquid-permeable top sheet positioned on the skin contact side, a liquid-impervious back sheet positioned on the skin non-contact side, and a liquid-absorbent core interposed between the sheets. A front waistline region and a rear waistline region opposite to each other, and a crotch region located between the waistline regions, and a waistline opening and a pair of leghole openings below the waistline opening. In addition, a pants-type disposable diaper is disclosed in which a tape fastener extending in a longitudinal direction capable of rounding a dirty diaper on the outer surface of a back sheet in a rear waist area is attached. The tape fastener has a rectangular shape that is long in the vertical direction, and is folded into a Z-shaped cross section in order to reduce the length in the vertical direction. In the tape fastener, the adhesive is applied to the overlapping portions, and the folded state is maintained via the adhesive.
[0003]
When the diaper is discarded, the diaper is rounded in the vertical direction from the crotch region toward the end of the waistline opening with the front waistline region inward. In this diaper, after it is rounded, the folded tape fastener is folded back and stretched in the vertical direction, and the tape fastener is fastened to the outer surface of the back sheet via an adhesive. In the diaper, the rolled state is maintained by the tape fastener.
[0004]
[Problems to be solved by the invention]
When the diaper disclosed in the above publication is rolled up and discarded, the tape fastener folded into a Z-shaped cross section must be folded back and stretched straight in the vertical direction, which requires much labor. Moreover, in this diaper, when the peeling strength in the overlapping part of the tape fastener is high, the tape fastener may not be smoothly folded back.
[0005]
The subject of this invention is providing the underpants type disposable diaper which can be extended to the vertical direction, without folding back a tape fastener.
[0006]
[Means for Solving the Problems]
The premise of the present invention for solving the above-mentioned problems is that the front waistline region and the back waistline region facing each other, and a crotch region located between these waistline regions, a pair of the waistline opening and the lower part thereof are provided. This is a pants-type disposable diaper in which a flexible tape fastener capable of rolling the diaper is attached to the outer surface of the diaper having an opening around the leg.
[0007]
The feature of the present invention in the premise is that the tape fastener includes a guide tape extending in the vertical direction on the outer surface of the diaper, and a slide tape extending in the vertical direction on the outer surface of the guide tape and capable of moving back and forth in the vertical direction. The guide tape has an upper end and a lower end fixed to the outer surface of the diaper, and an intermediate part positioned between the upper and lower ends and not fixed to the diaper. Has a free end portion provided with fastening means on the inner surface facing the guide tape, and a linkage located below the free end portion and attached to an intermediate portion of the guide tape so as to be slidable in the longitudinal direction. A toe portion.
[0008]
As an example of an embodiment of the present invention, the slide tape has side portions extending from both side edges of the locking end portion in the circumferential direction of the diaper, and these side portions are on the inner surface side of the guide tape. Are fixed to each other in a bent state.
[0009]
As another example of the embodiment of the present invention, the free end portion of the slide tape is temporarily attached to the outer surface of the guide tape via the fixing means so as to be peelable.
[0010]
As another example of the embodiment of the present invention, the longitudinal length of the intermediate portion of the guide tape is in the range of 30 to 100 mm, and the longitudinal length of the slide tape is in the range of 30 to 100 mm. In the slide tape, when the locking end moves to the upper end of the guide tape, the free end can be positioned outside the end of the waist opening. is there.
[0011]
As another example of the embodiment of the present invention, the diaper is a liquid-permeable surface sheet positioned on the skin contact side, a liquid-impermeable back sheet positioned on the skin non-contact side, and the sheets The tape fastener is attached to the outer surface of the back sheet.
[0012]
As another example of the embodiment of the present invention, the fastening means is either one of an adhesive applied to the slide tape and a hook member attached to the slide tape.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The details of the pants-type disposable diaper according to the present invention will be described below with reference to the accompanying drawings.
[0014]
1 and 2 are a partially broken perspective view of the diaper 1 shown from the side of the rear waist area and a perspective view of the tape fastener 16. FIGS. 3 and 4 show the guide tape 17 and the slide tape 18 separated from each other. They are the perspective view of these tapes 17 and 18 shown, and the II line end view of FIG. In FIG. 1, the waist direction is indicated by an arrow X, the vertical direction is indicated by an arrow Y, and the leg periphery direction is indicated by an arrow Z. In FIG. 2, a state in which the slide tape 18 is extended upward in the vertical direction is indicated by a virtual line. The inner surfaces of the front and back sheets 2 and 3, the guide tape 17, and the slide tape 18 refer to surfaces that face the core 4, and those outer surfaces refer to surfaces that do not face the core 4.
[0015]
The diaper 1 includes a liquid-permeable surface sheet 2 positioned on the skin contact side, a liquid-impermeable back sheet 3 positioned on the skin non-contact side, and a liquid-absorbent core interposed between the sheets 2 and 3. 4. The diaper 1 has a front waistline region 5 and a back waistline region 6 that face each other, and a crotch region 6 that is located between the waistline regions 5 and 7.
[0016]
The diaper 1 is located on the outer side of both end edges 4 a of the core 4 and has a waistline end portion 8 extending in the waistline direction around the front and rear waistline regions 5 and 7, and is positioned on the outside of both side edges 4 b of the core 4. It has a trunk periphery side portion 9 extending in the longitudinal direction in the surrounding regions 5 and 7, and a leg periphery side portion 10 positioned outside the both side edges 4 b of the core 4 and extending in the crotch region 6 in the leg periphery direction.
[0017]
In the diaper 1, the waistline side portion 9 overlaps in a palm-like shape, and the waistline side portion 9 is fixed via a large number of heat fusion portions 11 arranged in the vertical direction. The diaper 1 is formed with a waist opening 12 and a pair of leg openings 13 below. The top sheet 2 and the back sheet 3 overlap each other at the waist end 8, the waist side 9, and the leg side 10 of the diaper 1, and the inner surfaces of the sheets 2 and 3 are fixed to each other.
[0018]
A plurality of waist elastic members 14 extending in the waist direction are attached to the waist edge 8 in an expanded state. A number of gathers are formed in the waistline end portion 8 by the waistline elastic member 14 contracted inwardly in the waistline direction. A plurality of leg-around elastic members 15 extending in the leg circumference direction are attached to the leg circumference side portion 10 in an extended state. A large number of gathers are formed on the leg periphery side portion 10 by the leg periphery elastic members 15 contracted inwardly in the leg periphery direction. The waist elastic member 14 and the leg elastic member 15 are interposed between the top sheet 2 and the back sheet 3 and are fixed to at least one inner surface of the sheets 2 and 3.
[0019]
The core 4 extends from the crotch region 6 toward the front and rear waist regions 5 and 7. The core 4 is bonded to at least one inner surface of the top sheet 2 and the back sheet 3. A flexible tape fastener 16 capable of rolling the diaper 1 is attached to the outer surface of the back sheet 3.
[0020]
The tape fastener 16 is located at the center of the diaper 1 in the waist circumference direction and extends in the vertical direction between the crotch region 6 and the rear waist circumference region 7. The tape fastener 16 is formed of a guide tape 17 extending in the vertical direction on the outer surface of the back sheet 3 and a slide tape 18 extending in the vertical direction on the outer surface of the guide tape 17 and capable of moving back and forth in the vertical direction.
[0021]
The guide tape 17 and the slide tape 18 are flexible and non-stretchable, and have a rectangular shape that is long in the vertical direction. The guide tape 17 and the slide tape 18 use plastic films formed from polyolefin-based, polyester-based, or polyamide-based thermoplastic synthetic resins. For the guide tape 17 and the slide tape 18, a fiber nonwoven fabric can be used in addition to the plastic film.
[0022]
The guide tape 17 has an upper end portion 17a located in the rear waistline region 7, a lower end portion 17c located in the crotch region 6, and an intermediate portion 17b located between the upper and lower end portions 17a and 17c. The upper and lower end portions 17 a and 17 c are fixed to the outer surface of the back sheet 3 through a hot melt adhesive 19. The intermediate portion 17 b is not fixed to the outer surface of the back sheet 3.
[0023]
The slide tape 18 is attached to a free end portion 18a extending between the upper end portion 17a and the intermediate portion 17b of the guide tape 17 and slidably attached to the intermediate portion 17b of the guide tape 17 located below the free end portion 18a. And a side portion 18d extending from both side edges 18c of the locking end portion 18b in the circumferential direction.
[0024]
The free end 18a of the slide tape 18 is formed with an adhesive part 18e to which the adhesive 20 is applied and a gripping part 18f to which the adhesive 20 is not applied. The free end portion 18a of the slide tape 18 is temporarily attached to the outer surface of the intermediate portion 17b of the guide tape 17 through an adhesive portion 18e so as to be peelable.
[0025]
At the intermediate portion 17 b of the guide tape 17, the side portion 18 d of the slide tape 18 is bent toward the inner surface side of the guide tape 17, and the side portions 18 d are fixed to each other via the hot melt adhesive 21. In the tape fastener 16, the locking end portion 18 b and the side portion 18 d of the slide tape 18 form a ring that surrounds the inner surface and the outer surface of the intermediate portion 17 b of the guide tape 17.
[0026]
FIG. 5 is a perspective view of the diaper 1 rolled up for disposal. The procedure for discarding the diaper 1 will be described as follows. The diaper 1 is rolled up in the vertical direction from the crotch region 6 toward the waistline end portion 8 with the front waistline region 5 facing inside. The waistline end portion 8 is located on the outer periphery of the rolled diaper 1.
[0027]
After the diaper 1 is rolled up, the gripping portion 18 f of the slide tape 18 is picked with a finger, the slide tape 18 is peeled off from the guide tape 17, and then the slide tape 18 is pulled toward the waist end 8. In the diaper 1, the slide tape 18 moves upward in the vertical direction indicated by the arrow S in FIG. As shown in phantom lines in FIG. 2, the locking end portion 18 b of the slide tape 18 moves from the lower end portion 17 c side of the guide tape 17 to the upper end portion 17 a side in the intermediate portion 17 b of the guide tape 17. The free end portion 18 a of the slide tape 18 is positioned outside the waistline end portion 8 so as to cross the waistline end portion 8 in the longitudinal direction. In the diaper 1, the free end 18 a of the slide tape 18 is pressed against the outer surface of the back sheet 3, and the free end 18 a of the slide tape 18 is stopped on the outer surface of the back sheet 3 through the adhesive 20 applied to the adhesive part 18 e. To wear.
[0028]
In the diaper 1, the slide tape 18 can advance and retract the intermediate portion 17 b of the guide tape 17 in the vertical direction, and the slide tape 18 can be moved vertically only by moving the slide tape 18 upward in the intermediate portion 17 b of the guide tape 17. Can be easily extended in the direction. In the diaper 1, the slide tape is not folded compared to that of the prior art, so that it is not necessary to fold the slide tape 18 and extend it straight in the vertical direction when the diaper 1 is discarded. It is easy to fasten 18a to the outer surface of the back sheet 3.
[0029]
In the diaper 1, the rolled state of the diaper 1 is held by the slide tape 18. In the diaper 1, the slide tape 18 is fixed to the back sheet 3 in a state of straddling the waist opening 12, so that the mouth of the waist opening 12 can be closed by the slide tape 18. In the diaper 1 rolled up for disposal, the waistline opening 12 does not open its mouth, and excrement and odor do not leak from the waistline opening 12. Moreover, in the diaper 1, since the leg periphery side part 10 is rounded with the diaper 1, the leg periphery opening 13 does not open a mouth, and excrement and odor do not leak from the leg periphery opening 13.
[0030]
In the tape fastener 16, since the free end 18a of the slide tape 18 is temporarily attached to the outer surface of the guide tape 17 via the adhesive 20, the free end 18a of the slide tape 18 is not prepared when the diaper 1 is worn. Never be idle.
[0031]
In the tape fastener 16, the longitudinal length L1 of the intermediate portion 17b of the guide tape 17 is preferably in the range of 30 to 100 mm, and the longitudinal length L2 of the slide tape 18 is in the range of 30 to 100 mm. There is preferably (see FIG. 3). When the length dimension L1 and the length dimension L2 are less than 30 mm, depending on the position where the tape fastener 16 is attached, the slide tape 18 is moved from the lower end portion 17c side to the upper end portion 17a side in the intermediate portion 17b of the guide tape 17. Even if it is moved, the free end portion 18 a of the slide tape 18 may not be positioned outside the waistline end portion 8, and the mouth of the waistline opening 12 cannot be closed by the slide tape 18. It is preferable that the dimension L3 in the circumference direction of the guide tape 17 and the free end 18a and the locking end 18b of the slide tape 18 is in the range of 5 to 10 mm.
[0032]
6 and 7 are a perspective view of a tape fastener 16 showing another embodiment and a perspective view of the diaper 1 rolled up for disposal. In FIG. 6, a state where the slide tape 18 is extended upward in the vertical direction is indicated by a virtual line. The tape fastener 16 of FIG. 6 is different from that of FIG. 1 as follows. In the tape fastener 16, the slide tape 18 forming the tape fastener 16 has elastic stretchability in at least the longitudinal direction of the longitudinal direction and the waist direction.
[0033]
The procedure for discarding the diaper 1 is the same as that shown in FIG. In the diaper 1, when the diaper 1 is discarded, the locking end 18 b of the slide tape 18 is moved from the lower end 17 c side to the upper end 17 a side in the intermediate portion 17 b of the guide tape 17, and then the free end portion of the slide tape 18. 18a is fixed to the outer surface of the back sheet 3 while extending in the vertical direction. In the diaper 1, the outer periphery of the rolled diaper 1 can be tightened by using the elongation stress of the slide tape 18, and the mouth of the waist opening 12 can be reliably closed.
[0034]
For the slide tape 18, either a fiber nonwoven fabric having elastic stretchability or a plastic film having elastic stretchability can be used.
[0035]
As the stretchable fiber nonwoven fabric, those produced by melt blown or spunbond manufacturing methods can be used. As the constituent fiber of the stretchable nonwoven fabric, a stretchable fiber obtained by melting and spinning a thermoplastic elastomer resin can be used. In addition, a hydrophobic fiber nonwoven fabric made of crimped fibers obtained by melting and spinning a thermoplastic synthetic resin of polypropylene, polyethylene, or polyester was bonded to at least one surface of a hydrophobic fiber nonwoven fabric made of thermoplastic elastomer resin fibers. A composite nonwoven fabric can also be used.
[0036]
As the top sheet 2, a hydrophilic fiber nonwoven fabric or a plastic film having a large number of fine holes can be used. On the back sheet 3, a hydrophobic fiber nonwoven fabric, a gas-permeable liquid-impervious plastic film, a composite nonwoven fabric layered with a hydrophobic fiber nonwoven fabric, and a composite layered with a hydrophobic fiber nonwoven fabric and a gas-permeable liquid-impermeable plastic film Any of the sheets can be used.
[0037]
For the back sheet 3, a composite nonwoven fabric obtained by sandwiching a fiber nonwoven fabric by a melt blown method having high water resistance between fiber nonwoven fabrics by a spunbond method having high strength and high flexibility can also be used.
[0038]
As the non-woven fabric forming the front and back sheets 2 and 3, those produced by each method of spun lace, needle punch, melt blown, thermal bond, spun pond, chemical bond, and air through can be used. As the constituent fibers of the nonwoven fabric, polyolefin-based, polyester-based, polyamide-based fibers, core-sheath type composite fibers or parallel type composite fibers made of polyethylene / polypropylene or polyester can be used.
[0039]
The core 4 is a mixture of fluff pulp and superabsorbent polymer particles, or a mixture of fluff pulp, superabsorbent polymer particles and thermoplastic synthetic resin fibers, and is compressed to a required thickness. The core 4 is preferably covered and bonded to a tissue paper as a whole in order to prevent it from being deformed or from falling off polymer particles. As the polymer particles, starch-based, cellulose-based or synthetic polymer-based particles can be used.
[0040]
When the back sheet 3 is formed of a nonwoven fabric, in addition to applying the adhesive 20 to the inner surface of the free end portion 18a of the slide tape 18, a hook member of a mechanical fastener is attached to the inner surface of the free end portion 18a. It can also be attached. When the hook member is caught by the fibers forming the nonwoven fabric, the free end portion 18a of the slide tape 18 can be fixed to the outer surface of the back sheet 3 of the rolled diaper 1.
[0041]
In the diaper 1, the tape fastener 16 extends in the vertical direction between the crotch region 6 and the back waist region 7, but the crotch region 6 is in a state where the tape fastener 16 is located at the center of the diaper 1 in the waist direction. The front waistline region 5 may extend in the vertical direction, and either the front waistline region 5 or the back waistline region 7 may extend in the vertical direction.
[0042]
For fixing the front and back sheets 2 and 3, bonding the core 4 to the front and back sheets 2 and 3, and fixing the elastic members 14 and 15, a hot-melt adhesive or heat welding means such as heat seal or sonic seal Can be used.
[0043]
【The invention's effect】
In the pants-type disposable diaper according to the present invention, the tape fastener is formed of a guide tape and a slide tape, and the slide tape can advance and retract in the longitudinal direction of the intermediate portion of the guide tape. The slide tape can be easily extended in the vertical direction simply by moving it. Also, in this diaper, compared to that of the prior art, the slide tape is not folded, so there is no need to fold the slide tape and stretch it straight in the vertical direction when discarding the diaper, and the diaper is rolled up. It is easy to fix to the outer surface of the.
[0044]
In a diaper in which the upper end of the slide tape is temporarily attached to the outer surface of the guide tape, the upper end of the slide tape can be prevented from inadvertently moving on the outer surface of the diaper.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of a diaper shown from the side of a rear waist area.
FIG. 2 is a perspective view of a tape fastener.
FIG. 3 is a perspective view showing the guide tape and the slide tape separately.
4 is an end view taken along line II in FIG. 1. FIG.
5 is a perspective view of the diaper of FIG. 1 rolled up for disposal.
FIG. 6 is a perspective view of a tape fastener showing another embodiment.
7 is a perspective view of the diaper of FIG. 6 rolled up for disposal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pants-type disposable diaper 2 Liquid-permeable surface sheet 3 Liquid-impermeable back sheet 4 Liquid-absorbent core 5 Front waist area 6 Inseam area 7 Rear waist area 8 Trunk edge (end)
12 Opening around the waist 13 Opening around the leg 16 Tape fastener 17 Guide tape 17a Upper end 17b Intermediate portion 17c Lower end 18 Slide tape 18a Free end 18b Locking end 18c Both side edges 18d Side 20 Adhesive (fastening means)
L1 Length dimension L2 Length dimension

Claims (6)

An outer surface of a diaper having a front waist region and a rear waist region facing each other, and a crotch region positioned between the waist regions, and having a waist opening and a pair of leg openings below the waist. In a pants-type disposable diaper with a flexible tape fastener that can keep the diaper round,
The tape fastener is formed of a guide tape extending in the vertical direction on the outer surface of the diaper, and a slide tape extending in the vertical direction on the outer surface of the guide tape and capable of moving back and forth in the vertical direction,
The guide tape has an upper end portion and a lower end portion fixed to the outer surface of the diaper, and an intermediate portion positioned between the upper and lower end portions and not fixed to the diaper, and the slide tape includes the guide tape A free end provided with fastening means on the inner surface facing the tape, and a locking end located below the free end and attached to the intermediate part of the guide tape so as to be slidable in the longitudinal direction; The said diaper characterized by having. The slide tape has side portions extending in the circumferential direction of the diaper from both side edges of the locking end portion, and the side portions are fixed to each other in a state of being bent to the inner surface side of the guide tape. 2. The diaper according to claim 1, wherein: The diaper according to claim 1 or 2, wherein a free end portion of the slide tape is temporarily attached to an outer surface of the guide tape via the fastening means so as to be peelable. The longitudinal length of the intermediate portion of the guide tape is in the range of 30 to 100 mm, and the longitudinal length of the slide tape is in the range of 30 to 100 mm. 3. The free end portion can be located outside the end portion of the trunk periphery opening when the toe portion moves toward the upper end portion of the guide tape. The listed diaper. The diaper is composed of a liquid-permeable surface sheet located on the skin contact side, a liquid-impermeable back sheet located on the skin non-contact side, and a liquid-absorbent core interposed between the sheets, The diaper according to claim 1, wherein the tape fastener is attached to an outer surface of the back sheet. The diaper according to any one of claims 1 to 5, wherein the fastening means is one of an adhesive applied to the slide tape and a hook member attached to the slide tape.

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