KR100706042B1 - Disposable diaper - Google Patents

Abstract

An object of the present invention is to provide a disposable diaper which can form a pocket without attaching an end sheet.

In the region around the rear body 22 of the diaper, the first region 23 extending in the width direction and spaced apart by a predetermined dimension from the edge 4b of the core 4 in the longitudinal direction outward, and the edge of the core 4 ( Between the 4b) and the 1st area | region 23, the 2nd area | region 24 extended in the width direction is divided, and the rigidity of the 2nd area | region 24 is the agent which the 1st area | region 23 and the core 4 interpose. It is lower than that with the three regions, and the longitudinal end 6c of the cuff 6 is fixed on the first region 23 so that the first region 23 is closed by the contraction of the cuff 6. 25) in the direction shown.

Description

Disposable Diapers {DISPOSABLE DIAPER}

1 is a partially broken perspective view of a disposable diaper;

FIG. 2 is a sectional view seen from the arrow direction A-A in FIG. 1; FIG.

3 is a plan view of the diaper in FIG. 1;

4 is a cross-sectional view taken along the line B-B in FIG.

<Explanation of symbols for main parts of drawing>

1: laminated panel

2: liquid permeable top sheet

3: liquid impermeable back sheet

4: liquid absorbent core

4a: side edge

4b: by far

5: side flap

6: leakage prevention cuff

6c: both ends in the longitudinal direction

8, 9: elastic member

20: front torso area                 

21: crotch area

22: the area around the torso

23: first region

24: second area

25: third area

L1, L2: Dimension

P1, P2: Pocket

The present invention relates to a disposable diaper for absorbing and maintaining feces of the human body.

Japanese Patent Application Laid-open No. Hei 10-328234 discloses a pair of leak-proof cuffs extending in the longitudinal direction opposite to each other with a liquid absorbent core interposed between the top sheet and the back sheet, and located in the front and rear body circumference region. Disclosed is a disposable diaper with a pair of end cuffs extending in the width direction between the prevention cuffs. The end cuff has a fixed end fixed to the top sheet along both ends of the front and rear body circumference region, a free end facing inwardly of the diaper, and both side edges fixed to the leakage preventing cuff, and an elastic member is elongated at the free end. It is attached in a state. In this diaper, the top sheet and the end cuff form a pocket opening toward the inner side in the longitudinal direction of the diaper to prevent leakage of excrement from the front and rear ends of the diaper.

The diaper disclosed in Japanese Patent Application Laid-open No. Hei 10-328234 must attach end cuffs to these torso regions to form pockets that open inwardly to the torso region to the inside of the diaper. At the time of wearing a diaper, the area around the front and back of the diaper is pressed on the abdomen and the back of the wearer, so that the top sheet and the end cuff are in close contact with each other and the pockets may be clogged.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disposable diaper which can form a pocket without attaching an end sheet to the front and rear body circumference region, and the pocket is not easily clogged when worn.

In order to solve the above-mentioned problems, the present invention is a laminated panel composed of a liquid permeable top sheet, a liquid impermeable back sheet, and a liquid absorbent core interposed between these sheets, wherein the panel includes a front circumferential region and a rear side. A crotch region located between the body circumference region, the front and rear body circumference region, a pair of side flaps located outside the side edges of the core and extending in the longitudinal direction, and in the longitudinal direction near both side edges of the core; It is to improve a disposable diaper having a pair of leak-proof cuffs which extend to the side and have an elastic tendency to stand up above the panel.

The present invention is characterized in that at least one of the front and rear body circumferential region is spaced apart from the edge of the core by a dimension required outward in the longitudinal direction and extends in the width direction, and the edge of the core And a second region extending in the width direction between the first region and the first region, and the rigidity of the second region is lower than that between the first region and the third region interposed between the core and the cuff. At least one of the first region and the second region has a longitudinal end portion positioned in the front and rear body circumference region of the cuff so that the first region can be pulled toward the third region by contraction. It is stuck to the phase.

As an example of embodiment of this invention, the rigidity of the said 1st-3rd area | region has a relationship of said 1st, 3rd area | region> said 2nd area | region, and the stiffness value when measured by the Gurley method is the said Sections of the cuff separated from the diaper are in the range of 0.05 to 0.5 mg in the third region, 0.1 to 2.0 mg in the first region and 0.01 to 0.2 mg in the second region. The tensile force required to elongate 93.3% with respect to the entire longitudinal length of the section is in the range of 20 to 300 gf.

As another example of embodiment of this invention, the dimension of the said longitudinal direction of a said 1st area exists in the range of 10-70 mm, and the dimension of the said longitudinal direction of a said 2nd area exists in the range of 5-70 mm.

As another example of embodiment of this invention, the longitudinal direction edge part of the said cuff is stuck in the state which fell inside of the said panel.

As another example of an embodiment of the present invention, any one of the elastically stretchable sheet-like polyurethane foam, the synthetic rubber foam, the polystyrene foam, or the elastically stretchable urethane film may be formed in the first region. It is fixed in the stretched state between the back sheets.

The details of the disposable diaper according to the present invention will be described with reference to the accompanying drawings.

1 and 2 are a partially broken perspective view of the diaper, and a sectional view seen from the arrow direction A-A in FIG. The diaper is interposed between the liquid permeable top sheet 2, the liquid impermeable back sheet 3, and the top sheet 2 and the back sheet 3, and is bonded to at least one inner surface of these sheets 2, 3. It consists of the laminated panel 1 which has the liquid absorptive core 4 made.

The panel 1 has a front circumference region 20, a rear circumference region 22 and a crotch region 21 positioned between these front and rear circumference regions 20, 22 in the longitudinal direction. The panel 1 is located outside the side edges 4a of the core 4 and extends in the longitudinal direction of the panel 1 and a pair of side flaps 5 extending in the longitudinal direction of the panel 1. There is a pair of leakage preventing cuffs 6 having an upstanding tendency above the panel 1.

The region around the rear body 22 of the panel 1 is spaced apart from the edge 4b of the core 4 in the longitudinal direction outward by a predetermined dimension and extends in the width direction of the panel 1. The 2nd area | region 24 located between the edge 4b of the core 4 and the 1st area | region 23 and extending in the width direction of the panel 1 is formed. In the panel 1, the pocket P1 in which the second region 24 opens in the longitudinal direction of the panel 1 between the first region 23 and the third region where the core 4 is interposed. ), And a pocket P2 is formed in which the second region 24 and the cuff 6 open toward the width direction inner side of the panel 1.                     

In the rear waist region 22 of the panel 1, a pair of tape fasteners 10 whose base ends are attached to the panel 1 extends inward in the width direction of the panel 1. In the front torso region 20 of the panel 1, a rectangular target tape 11, which is a fixing region of the tape fastener 10, is attached to the outer surface of the back sheet 3.

The side flaps 5 extend in an arc direction in the width direction of the panel 1 in the crotch region 21. In the side flap 5, an elastic member 7 for leg circumference is interposed between the top sheet 2 and the back sheet 3, and is fixed to at least one inner surface of these sheets 2 and 3 in an elongated state. .

The cuff 6 is fixed to the outer surface of the top sheet 2 and extends in the longitudinal direction of the panel 1, and a free side edge extending in the longitudinal direction opposite to the fixed side edge 6a. 6b and the longitudinal direction both ends 6c located in the front-back body circumference area | region 20 and 22 of the panel 1. As shown in FIG. The elastic member 8 is attached to the cuff 6 under extension | stretching in the state covered with the free side edge part 6b. In the rear circumference region 22, the panel 1 is located on the first region 23 and from the first region 23 with the longitudinal end 6c of the cuff 6 falling down inside the panel 1. Is fixed to the periphery of the rear circumference region 22 extending in the longitudinally outward direction. In the front circumference region 20, the longitudinal end 6c of the cuff 6 is fixed to the edge of the front circumference region 20 in a state in which the longitudinal end portion 6c of the cuff 6 falls down inside the panel 1 (see FIG. 3). . The cuff 6 has a dimension between the longitudinal ends 6c when the cuff 6 is elongated in the longitudinal direction against the contracting force of the elastic member 8, in the range of 450 to 530 mm, and the fixed side edge 6a. It is preferable that the dimension between and the free side edge 6b is in the range of 20-50 mm.

The first region 23 is formed of an elastic member 9 interposed between the top sheet 2 portion, the back sheet 3 portion, and the sheet 2, 3 portion. The elastic member 9 is stretchable in the width direction of the panel 1, and is fixed to the inner surfaces of these sheet 2, 3 portions in an elongated state. The second region 24 is formed of the top sheet 2 portion and the back sheet 3 portion, and the inner surfaces of these sheet portions 2, 3 are fixed to each other. Since the elastic member 9 and the core 4 are not interposed in the second region 24, the rigidity of the second region 24 is higher than that of the first region 23 and the third region 25. low.

In the rear circumference region 22, the free end 6b of the cuff 6 contracts in the longitudinal direction of the panel 1 due to the contraction of the elastic member 8, and the first region 23 is in the third region. At the same time as the area 25 is pulled, the first area 23 is lifted above the panel 1 than the third area 25, so that the step between the first area 23 and the third area 25 is increased. Is formed.

In the second region 24, the portion 24a positioned on the side of the first region 23 stands up on the upper side of the panel 1 so as to cover the upper surface of the panel 1 to form a barrier, and at the same time, the portion 24a. ) And the part 24b located in the 3rd area | region 25 side form the pocket P1 which opens toward the longitudinal direction inner side of the panel 1. Since the pocket P1 is recessed below the panel 1, even if the wearer's buttocks press the pocket P1 downward from the upper side of the panel 1, the pocket P1 is not blocked.

In FIG. 1, the panel 1 is curved in the longitudinal direction with its inner surface inward, and the elongated state of the elastic members 7, 8, 9 is released so that the rear body region 22 and the side flap 5 A gather is formed in the cuff 6.

3 is a plan view of the diaper shown in FIG. The stiffness values measured by the Gali method are each in the range of 0.05 to 0.5 mg in the third region 25, in the range of 0.1 to 2.0 mg in the first region 23, and in the range of 0.01 to 0.2 in the second region 24. It is preferred to be in the range of mg. In these regions 23, 24, and 25, the rigidity of the first region 23 and the third region 25 may be higher than that of the second region 24, and the value is set at the upper and lower limits of the stiffness value. You can choose appropriately.

When the stiffness value of the first region 23 is less than 0.1 mg and the stiffness value of the third region 25 is less than 0.05 mg, the free side edge 6b of the cuff 6 may contract in the longitudinal direction of the panel 1. At this time, the first region 23 and the third region 25 are only reduced in the longitudinal direction of the panel 1, and no step is generated between the first region 23 and the third region 25, and the second region is not. The pocket P1 may not be formed in 24. If the stiffness of the second region 24 is less than 0.01 mg, a large number of wrinkles are formed in the second region 24, so that the shape of the pocket P1 may not be maintained.

If the stiffness value of the first region 23 exceeds 2.0 mg and the stiffness value of the third region 25 exceeds 0.5 mg, these regions 23 and 25 impart a hard feel to the wearer, thereby providing The fit is impaired. When the rigidity of the second region 24 exceeds 0.2 mg, the first region with the second region 24 pulled out even if the free side edge 6b of the cuff 6 contracts in the longitudinal direction of the panel 1. The region 23 may not be pulled in the third region 25 direction and the pocket P1 may not be formed in the second region 24.                     

The tensile force required to separate the cuff 6 including the elastic member 8 from the panel 1 and extend the section of the cuff 6 to 93.3% of the entire length in the longitudinal direction of the section ranges from 20 to 300 gf. Preferably it is the range of 30-50 gf. If the tensile force of the section is less than 20 gf, it is also dependent on the rigidity of the second region 24, but the first region 23 is not limited to the longitudinal direction of the panel 1, but the first region 23 is extended to the third region 25. You may not be able to pull in the direction. When the tensile force of the section exceeds 300 gf, the panel 1 is bent in the second region 24 so that the panel 1 is bent in the second region 24, depending on the stiffness of the first and second regions 23 and 24. It may fall to 25, and the 1st area | region 23 must be folded back when the panel 1 is worn.

Here, the tensile force is the force that the tester tensions the section when the section is stretched by 93.3% in the longitudinal direction with respect to the entire length of the section, in other words, the contraction force of the section. The measurement of the tensile force was performed by the following method. When the cuff 6 is removed from the top sheet 2 at the fixed side edge portion 6a and the longitudinal direction both ends 6c and extended in the longitudinal direction, the total length is in the range of 450 to 530 mm and the dimension in the width direction. A section of the cuff 6 in the range of 20 to 50 mm was used as a sample. The longitudinal ends of the sections, which have been reduced by the contraction of the elastic member 8, are inserted into the chuck of the tester with dimensions of approximately 10 mm and the sections are stretched to 93.3% of their total length at a rate of 100 mm / min. After the expansion, the stretched state was released. Again, the sections were stretched to 93.3% of their total length, and the force applied to the tester at that time was measured. Stretching the section to 93.3% means that if the section is 450 mm in total length, the section is stretched to approximately 400 mm, 420 mm minus approximately 20 mm fitted to the chuck, multiplied by 0.933.

The dimension L1 in the longitudinal direction of the first region 23 is in the range of 10 to 70 mm, preferably in the range of 20 to 50 mm. The dimension L2 in the longitudinal direction of the second region 24 is in the range of 5 mm to 70 mm, preferably in the range of 15 mm to 30 mm.

If the dimension L1 of the first region 23 is less than 10 mm, the area of the first region 23 that contacts the wearer's skin at the time of wearing the panel 1 becomes small, so that the skin and the first region of the wearer are small. Excretion may leak between (23). If the dimension L2 of the second region 24 is less than 5 mm, the second region 24 moves to the upper side of the panel 1 even if a step is generated between the first region 24 and the third region 25. Since it is only a standing barrier, the pocket P1 cannot be formed.

If the dimension L1 of the first region 23 exceeds 70 mm, the third region 25 cannot be made smaller in order to maintain the excretion absorption function of the panel 1 which is naturally limited in the dimension in the longitudinal direction. For this reason, the dimension L2 of the second region 24 must be made small, so that the dimension L2 of the second region 24 may be less than 5 mm. Conversely, if the dimension L2 of the second region 24 exceeds 70 mm, the dimension L1 of the first region 23 must be made smaller, and the dimension L1 of the first region 23 is 10 mm. It may become less. When each of the dimensions L1 and L2 between the first region 23 and the second region 24 exceeds 70 mm, the ratio of the first and second regions 23 and 24 to the entire panel 1 is occupied. Since this extremely large and the third region 25 is too small, the excrement absorption function of the panel 1 is significantly reduced.

4 is a cross-sectional view taken along the line B-B in FIG. The top sheet 2 ends in the outer vicinity of the side edge of the elastic member 9, and the back sheet 3 and the cuff 6 part extend further from the side edge of the top sheet 2 to the outer side in the width direction. The longitudinal end 6c of the cuff 6 is fixed to the outer surface of the top sheet 2 on the first region 23, and the inner surface of the back sheet 3 and the cuff 6 portion in the side flap 5. Are stuck together.

As the top sheet 2, a hydrophilic nonwoven fabric obtained by treating a hydrophobic nonwoven fabric with a hydrophilizing agent or a fiber in which a hydrophilizing agent is kneaded is used. Fine openings may be provided in these nonwoven fabrics.

As the back sheet 3 and the cuff 6, a synthetic resin film or a laminate sheet of a synthetic resin film and a hydrophobic nonwoven fabric is used. In addition to these sheets, a cuff-like elastic stretchable sheet having a tensile strength in the range of 20 to 300 gf can be used for the cuff 6. In the case of using the elastic stretchable sheet, the cuff 6 is attached to the panel 1 in the longitudinal direction, and the attachment of the elastic member 8 to the free side edge 6b of the cuff 6 can be omitted. Can be.

The core 4 is a mixture of flap pulp and superabsorbent polymer particles, compressed to a predetermined thickness, and entirely covered by a liquid permeable sheet such as tissue paper.

As the elastic member 9 attached to the first region 23, any one of elastically stretchable sheet-like polyurethane foam, synthetic rubber foam, polystyrene foam, or elastically stretchable urethane film can be used. In addition to attaching these elastic members 9 to the first region 23, a hot melt adhesive or the like may be applied in a band form between the top sheet 2 and the back sheet 3 as a means for increasing the rigidity. In addition, a plurality of thread-shaped elastic members are interposed between the top sheet 2 and the back sheet 3 so that the thread-shaped elastic members are fixed to at least one of these sheets 2 and 3 so as to exhibit a band shape or a non-stretch band-shaped plastic. The sheet may be interposed between the top sheet 2 and the back sheet 3 to adhere the plastic sheet to at least one of these sheets 2 and 3.

For the bonding of the cores 4, the fixing and attaching of the elastic members 7, 8 and 9, and the fixing of the sheets 2 and 3 and the cuff 6, the technique of thermal welding in addition to adhesives such as hot melt adhesives and adhesives Can be.

The end part 6c of the cuff 6 may be stuck on the 1st area | region 23 in the state which fell to the outer side of the panel 1, and a 1st area | region in the longitudinal direction outer side rather than the edge 4b of the core 4 It may be fixed on the second region 24 provided that it is fixed on (23). In FIG. 3, although the first region 23 extends outward in the width direction of the panel 1 from the fixed side edge portion 6a of the cuff 6, at least between the fixed side edge portions 6a of the cuff 6. It should just be formed.

The present invention forms the first and second regions 23 and 24 in the front torso region 20 in addition to the rear torso region 22, or together with the rear torso region 22, and the front torso region. The pockets P1 opening in the longitudinal direction of the panel 1 and the pockets P2 opening in the width direction of the panel 1 may be formed in the 20 and 22.

 According to the disposable diaper according to the present invention, the first region formed in any one of the front and rear body circumference regions is pulled in the direction of the third region where the core is interposed by the contraction of the cuff and between the first region and the third region. A step is formed, and the 2nd area | region located between a 1st area | region and a 3rd area | region forms the pocket which opens toward the longitudinal direction inner side of a diaper, and the pocket which opens toward the width direction inner side of a diaper. Thus, it is not necessary to attach the end sheet to the front and rear torso region as in the prior art diaper to form a pocket.

Since the pocket opening toward the inner side in the longitudinal direction of the diaper is recessed to the lower side of the diaper, the pocket does not become clogged even if the wearer's hip presses the pocket from the upper side to the lower side of the diaper.

A step is formed in the first region and the third region, and since the first region located above the diaper than the third region is in close contact with the wearer's skin, there is a gap between the end of the front and rear torso region and the wearer's skin. It can prevent generation, and can improve the prevention of leakage of excreta.

Claims (5)

A laminated panel 1 is composed of a liquid permeable top sheet 2, a liquid impermeable back sheet 3, and a liquid absorbent core 4 interposed between these sheets, the panel 1 having a front body circumference. As long as it extends in the longitudinal direction on the outer side of the region 20, the rear waist region 22, the crotch region 21 located between the front and rear waist regions, and both side edges of the core 4 A pair of side flaps 5 and a pair of leakage prevention extending in the longitudinal direction near both side edges 4a of the core 4 and having a standing propensity upward of the panel 1 by elastic elasticity. A disposable diaper having a cuff (6), wherein at least one of the front and rear body circumferential regions is spaced apart by a predetermined dimension from the edge (4b) of the core (4) to extend in the longitudinal direction and extends in the width direction. 1 area | region 23, the edge 4b of the said core 4, and the said 1st A second region 24 extending in the width direction is partitioned between the regions 23, and a rigidity of the second region 24 is interposed between the first region 23 and the core 4. Lower than that of the region 25, the front and rear of the cuff 6 so as to be able to pull the first region 23 in the direction of the third region 25 by contraction of the cuff 6. Disposable diaper, characterized in that the longitudinal end portion located in the region around the body is fixed on at least the first region (23) of the first region (23) and the second region (24). The rigidity of the said 1st-3rd area | region is in the relationship of the said 1st area | region 23, the 3rd area | region 25> the said 2nd area | region 24, and it measured by the Galling method. The stiffness of is in the range of 0.05 to 0.5 mg in the third region 25, in the range of 0.1 to 2.0 mg in the first region 23 and in the range of 0.01 to 0.2 mg in the second region 24, Disposable diaper having a tensile force in the range of 20 to 300 gf required to stretch the section of the cuff (6) separated from the diaper to 93.3% of the longitudinal length of the section. The dimension of the said longitudinal direction of the said 1st area | region 23 is 10-70 mm, The dimension of the said longitudinal direction of the said 2nd area | region 24 is 5-70 mm. Disposable diapers which are in range. The disposable diaper according to claim 1 or 2, wherein the longitudinal end portion of the cuff (6) is fixed in a state in which the longitudinal end of the cuff (6) is collapsed inward of the panel (1). According to claim 1 or 2, wherein the first region 23 is any one of the elastically stretchable sheet-like polyurethane foam, synthetic rubber foam, polystyrene foam, or elastically stretchable urethane film is the top A disposable diaper fixed between the sheet (2) and the back sheet (3) in a stretched state.

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