JP2012143299A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate continuous attachment of a diaper to a wearer.SOLUTION: A disposable diaper 1 including one girth opening and a pair of leg openings has an abdominal side part 4F, a back side part 4B, a crotch part 4C, and a pair of stretchable or flexible leg sheets 6L and 6R. Vertical direction circumferential edge areas 6LF, 6LB, 6RF and 6RB and inner side edge areas 6LI and 6RI of the leg sheets are respectively joined to the lower edge areas 4FB and 4BB of the abdominal side part and the back side part and the side edge areas 4CL and 4CR of the crotch part 4C on one side of an interior body. The leg sheets include cutouts 6LC and 6RC respectively. The outer side edge areas 6LOF, 6LOB, 6ROF and 6ROB of the leg sheets are joined with each other.

Description

  The present invention relates to a disposable diaper.

  A disposable diaper having a waist opening and a pair of leg openings, and a ventral part and a back part which are separated from each other in the longitudinal direction when the diaper is deployed, and an elasticity which is joined to the ventral part and the back part A disposable diaper is known that includes a sheet and in which the side edge regions of the ventral portion and the dorsal portion are joined by a tape fastener, respectively (see Patent Document 1). If it does in this way, since an elastic sheet contacts a wearer, a diaper can track a wearer's movement easily and can suppress a gap fall of a diaper.

JP 2001-8968 A

  However, in the above-mentioned diaper, since the tape fastener is located at a position away from the elastic sheet, the elastic sheet portion adjacent to the abdominal side portion and the elastic sheet portion adjacent to the back side portion are not joined to each other. As a result, the leg opening is greatly expanded by the movement of the wearer, and the elastic sheet may be detached from the wearer. Therefore, there is a possibility that the lowering of the diaper can not be sufficiently suppressed. Moreover, since the elastic sheet part adjacent to the ventral part and the elastic sheet part adjacent to the back part are not joined to each other, the elastic sheet part may be separated from the ventral part and the back part.

  According to a first aspect of the present invention, a disposable diaper having a waist opening and a pair of leg openings, comprising a ventral part, a dorsal part, and a crotch part, wherein the ventral part and the dorsal part are When the diaper is deployed, the crotch portions are longitudinally separated from each other in the transverse direction and joined to the abdominal portion and the dorsal portion, and the diaper is further stretched or stretched around a pair of legs. A longitudinal peripheral region and an inward side edge region of one leg periphery seat on one side of the crotch portion, respectively, a lower edge region of the ventral portion, a lower edge region of the back portion, and a side edge of the crotch portion One leg seat is arranged in the gap between the ventral part and the dorsal part on one side of the crotch part, and the longitudinal peripheral area and the inward side of the other leg seat The edge area is on the ventral side on the other side of the crotch. Joined to the lower edge area of the minute and the lower edge area of the dorsal part and the side edge area of the crotch part, so that on the other side of the crotch part, around the other leg in the gap between the ventral part and the dorsal part Disposable diapers are provided in which a sheet is disposed and each leg seat has a cutout defining a leg opening.

  According to a second aspect of the present invention, a disposable diaper having one waistline opening and a pair of leg hole openings, comprising a ventral part and a dorsal part, wherein the ventral part and the dorsal part are vertical when the diaper is deployed. The diapers are further provided with leg extension seats that are extensible or stretchable, and the longitudinal peripheral areas of the leg circumference seats are respectively substantially the entire lower edge area and the dorsal part of the ventral part. Joined to substantially the entire lower edge region, thereby placing a leg seat in the gap between the ventral and dorsal portions, the leg seat having a pair of cutouts defining a pair of leg openings. A disposable diaper is provided.

  The diaper can be kept in close contact with the wearer.

It is a top view of the disposable diaper of 1st Example by this invention. It is an expanded view of the diaper of FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. It is a figure which shows another Example of clipping. It is a figure which shows another Example of joining. It is a figure which shows another Example of a leg periphery sheet | seat. It is a figure which shows another Example of a leg periphery sheet | seat and a crotch part. It is a figure explaining the dimension of clipping. It is a top view of the disposable diaper of 2nd Example by this invention. It is an expanded view of the diaper of FIG. It is sectional drawing seen along line XI-XI of FIG. It is a figure which shows another Example of a disposable diaper.

  1, 2 and 3 show a first embodiment according to the present invention. In FIG. 2, L indicates the longitudinal direction of the diaper 1, and T indicates the transverse direction orthogonal to the longitudinal direction.

  Referring to FIGS. 1, 2, and 3, the disposable diaper 1 includes a ventral portion 4F, a back portion 4B, and a crotch portion 4C. The ventral portion 4F and the dorsal portion 4B are positioned on the wearer's ventral side and dorsal side, respectively, when worn.

  The ventral portion 4F and the dorsal portion 4B each have a rectangular shape and are spaced apart from each other in the longitudinal direction L when deployed. The ventral portion 4F and the dorsal portion 4B are provided with a plurality of elastic members 5F and 5B that extend substantially parallel to each other in the transverse direction T. In particular, as shown in FIG. 3, the ventral portion 4F and the dorsal portion 4B each include two liquid-impermeable sheets stacked on each other, and the elastic members 5F and 5B are arranged in an extended state between these sheets. Fixed to these sheets.

  The crotch portion 4C also has a rectangular shape, extends in the longitudinal direction L, and is joined to the ventral portion 4F and the dorsal portion 4B at an intermediate position in the transverse direction. In this case, the longitudinal peripheral regions 4CF and 4CB of the crotch portion 4C are joined to the lower edge regions 4FB and 4BB of the ventral portion 4F and the back portion 4B, respectively. As a result, the crotch portion 4C is located on the wearer's crotch when worn.

  The crotch portion 4C includes, for example, a liquid-impermeable back sheet and an absorbent body held by the back sheet. The absorber comprises, for example, a fiber assembly and superabsorbent polymer particles.

  The diaper 1 further includes a pair of generally leg-shaped leg seats 6L and 6R, that is, a left leg seat 6L located on the left side of the crotch portion 4C in FIGS. 1 and 2 and a right side of the crotch portion 4C. And a right leg leg seat 6R. The leg periphery sheets 6L and 6R have stretchability or stretchability, preferably stretchability.

  The elongation of the leg periphery sheets 6L and 6R is preferably 140% or more, and more preferably 180% or more. Here, the elongation of the sheet material is obtained as follows. That is, a line segment of 50 mm is drawn on a sheet material in a natural state, and then the sheet material is pulled and stretched, and the length B (mm) of the line segment when fully stretched is measured. Next, the elongation is calculated using the following equation.

      Elongation = B / 50x100 (%)

  Furthermore, the leg periphery sheets 6L and 6R have at least one of liquid impermeability, water repellency, and air permeability.

  The leg-around sheet can be composed of an extensible sheet or an elastic sheet. As the extensible sheet, for example, a thermoplastic resin film such as polyethylene or polypropylene can be used. Or it can also comprise from the composite sheet which bonded the non-extensible nonwoven fabric partially cut | disconnected or weakened to the thermoplastic resin film. On the other hand, as a stretchable sheet, for example, a non-stretchable nonwoven fabric partially cut or embrittled into a nonwoven fabric composed of stretchable fibers obtained by melting a thermoplastic elastomer resin such as urethane or styrene, or a nonwoven fabric composed of stretchable fibers. It can also comprise a composite sheet that is bonded together.

  The longitudinal peripheral regions 6LF and 6LB of the left leg periphery seat 6L are joined to the lower edge region 4FB of the ventral portion 4F and the lower edge region 4BB of the back portion 4B, respectively, on the left side of the crotch portion 4C. Further, the inner side edge region 6LI of the left leg periphery seat 6L is joined to the left side edge region 3L of the crotch portion 4C. As a result, the left leg periphery seat 6L is disposed in the gap 7L between the ventral portion 4F and the back portion 4B on the left side of the crotch portion 4C.

  Similarly, the longitudinal peripheral regions 6RF and 6RB of the right leg periphery seat 6R are respectively joined to the lower edge region 4FB of the ventral portion 4F and the lower edge region 4BB of the back portion 4B on the right side of the crotch portion 4C. . Further, the inner side edge region 6RI of the right leg periphery seat 6R is joined to the right side edge region 4CR of the crotch portion 4C. As a result, the right leg periphery seat 6R is disposed in the gap 7R between the ventral portion 4F and the dorsal portion 4B on the right side of the crotch portion 4C.

  Here, the abdominal portion 4F, the back portion 4B, the crotch portion 4C, the left leg periphery sheet 6L, and the right leg periphery sheet 6R are joined to each other by, for example, hot melt adhesive A (FIG. 3).

  In particular, as shown in FIG. 2, the left leg periphery sheet 6L has a cutout 6LC, and the right leg periphery sheet 6R has a cutout 6RC. In the first embodiment according to the present invention, the cutouts 6LC and 6RC each have an elliptical shape having a long axis extending in the vertical direction. Note that the peripheral edges that define the cutouts 6LC and 6RC are separated from the outer peripheral edges of the leg periphery sheets 6L and 6R, and thus the leg periphery sheets 6L and 6R have a ring shape.

  When the crotch portion 4C and the leg periphery sheets 6L and 6R are folded along a fold line FL substantially parallel to the transverse direction T, the outer side edge regions 6LOF and 6LOB of the left leg periphery sheet 6L are overlapped with each other, and the right Outer side edge regions 6ROF and 6ROB of the leg periphery seat 6R are overlapped with each other. Further, the left side edge region 4FL of the ventral side portion 4F and the left side edge region 4BL of the back side portion 4B are overlapped with each other, and the right side edge region 4FR of the ventral side portion 4F and the right side of the back side portion 4B are overlapped. The side edge regions 4BR are overlapped with each other.

  In addition, the outer side edge regions 6LOF and 6LOB of the left leg periphery seat 6L are joined to each other, and the outer side edge regions 6ROF and 6ROB of the right leg periphery seat 6R are joined to each other. Further, the left side edge region 4FL and the left side edge region 4BL are joined together, and the right side edge region 4FR and the right side edge region 4BR are joined together.

  As a result, as shown in FIG. 1, the left leg periphery opening 1LL is defined by the left leg periphery seat 6L, and the right leg periphery opening 1LR is defined by the right leg periphery seat 6R. Also, one waistline opening 1W is defined by the ventral portion 4F and the back portion 4B.

  Here, the outer side edge regions 6LOF and 6LOB of the left leg periphery seat 6L, the outer side edge regions 6ROF and 6ROB of the right leg periphery seat 6R, the left side edge region of the ventral side portion 4F and the back side portion 4B 4FL and 4BL and the right side edge regions 4FR and 4BR are respectively joined by, for example, a sonic seal, and are thus joined in a non-rejoinable manner. As a result, the diaper 1 has a pants shape.

  In the first embodiment according to the present invention, the cutouts 6LC and 6RC are formed so that the circumference or inner diameter of the leg opening 1LL and 1LR is smaller than the circumference or inner diameter of the wearer's leg.

  At the time of wearing, the wearer's legs are passed through the leg openings 1LL and 1LR, and the diaper 1 is pulled up. In this case, the leg periphery sheets 6L and 6R extend according to the shape of the wearer's leg. Accordingly, the leg periphery sheets 6L and 6R are in close contact with the wearer.

  And since the left leg periphery sheet | seat 6L and the right leg periphery sheet | seat 6R have comprised the ring shape, the leg periphery sheet | seats 6L and 6R can continue closely_contact | adhere over the circumference | surroundings of a wearer's leg. As a result, the leakage from the pair of leg openings 1LL and 1LR can be reliably suppressed. Moreover, it can also suppress that the leg periphery sheet | seats 6L and 6R isolate | separate from the ventral part 4F and the back part 4B.

  The leg seats 6L and 6R preferably have extensibility or stretchability in two directions orthogonal to each other, and preferably have stretchability or stretchability in the longitudinal direction L and the transverse direction T, for example. The leg-surrounding sheets 6L and 6R may be extensible or stretchable only in one direction. When the cutouts 6LC and 6RC are elliptical in the longitudinal direction, the leg-surrounding sheets 6L and 6R are in the longitudinal direction L. It preferably has extensibility or stretchability.

  Furthermore, in the first embodiment according to the present invention, the skin side surfaces of the leg periphery sheets 6L and 6R are flat. That is, the wrinkles are not provided on the skin side surfaces of the leg periphery sheets 6L and 6R. As a result, the leg periphery sheets 6L and 6R come into contact with the wearer in the form of surface contact rather than line contact. As a result, the adhesion of the leg periphery sheets 6L and 6R to the wearer is enhanced.

  4 (A), 4 (B), and 4 (C) show another embodiment of the cutouts 6LC and 6RC. Each of the cutouts 6LC and 6RC has a circular shape in the example shown in FIG. 4A, and has an elliptical shape having a long axis extending in the transverse direction in the example shown in FIG. 4B. In the example shown in FIG. 4C, each of the cutouts 6LC and 6RC is formed of a slit.

  In the example shown in FIG. 4B, it is preferable that the leg seats 6L and 6R have stretchability or stretchability at least in the transverse direction T. In the example shown in FIG. 6R preferably has extensibility or stretchability in at least the longitudinal direction L.

  When the notches 6LC and 6RC are long in the vertical direction as shown in FIG. 2, the leg opening 1LL and 1LR can be positioned at the groin portion of the wearer. In this case, the wearer's appearance can be simplified.

  On the other hand, when the notches 6LC and 6RC are long in the transverse direction as shown in FIG. 4B, the leg opening 1LL and 1LR can be positioned on the thigh of the wearer. In this case, it is possible to cover the wearer's body over a wide range with the diaper 1 while suppressing the movement of the wearer.

  In any case, since the leg opening 1LL, 1LR is formed smaller than the wearer's leg, the leg seat 6L, 6R can be in close contact with the wearer's leg when worn.

  In the first embodiment according to the present invention described above, the left side edge regions 4FL and 4BL of the ventral portion 4F and the back portion 4B are joined to each other in a non-rejoinable manner, and the right side edge regions 4FR and 4BR are joined together again. They are joined together so that they cannot be joined. Further, the outer side edge regions 6LOF and 6LOB of the left leg periphery seat 6L and the outer side edge regions 6ROF and 6ROB of the right leg periphery seat 6R are joined so as not to be rejoined. However, the ventral part 4F and the dorsal part 4B can be joined to each other so as to be rejoinable using, for example, a joining tool.

  That is, in the example shown in FIG. 5, a connector such as a hook-and-loop fastener including a pair of male members 8M and one female member 8F is provided. The male member 8M is provided on the back portion 4B, and the female member 8F is provided on the outer surface of the ventral portion 4F. In this case, the outer side edge regions 6LOF and 6LOB of the left leg periphery seat 6L and the outer side edge regions 6ROF and 6ROB of the right leg periphery seat 6R are not joined to each other.

  6 (A) and 6 (B) show another embodiment of the leg-around seats 6L and 6R. 6A and 6B show only the leg-surrounding seat 6L, the leg-surrounding seat 6R can be configured similarly.

  In the example shown in FIG. 6 (A), one weak line 9 extending from the cutout 6LC to the outer side edge 6LOE is provided in the leg periphery sheet 6L. As a result, the size of the leg opening 1LL defined by the cutout 6LC can be adjusted by breaking the leg seat 6L along the line of weakness 9. In addition, the weak line 9 does not need to extend to the outer side edge 6LOE.

  In the example shown in FIG. 6B, a plurality of, for example, two weak lines 9 extending from the cutout 6LC to the outer side edge 6LOE are provided in the leg-around seat 6L. As a result, it is possible to adjust the size of the leg hole opening 1LL by breaking the leg sheet 6L along the line of weakness 9 and removing the sheet portion 6X sandwiched between the lines of weakness 9.

  FIG. 7A shows another embodiment of the leg-around seats 6L and 6R, and FIGS. 7B and 7C show another embodiment of the crotch portion 4C. In each of the embodiments described so far, the leg periphery sheets 6L and 6R are joined to the inner surfaces of the ventral portion 4F and the back portion 4B, that is, the wearer side. On the other hand, in the example shown in FIG. 7A, the leg periphery sheets 6L and 6R are joined to the outer surface 4FO of the abdominal portion 4F and the outer surface 4BO of the dorsal portion 4B.

  In the example shown in FIG. 7B, the absorber AD is provided separately from the crotch portion 4C. That is, the crotch portion 4C includes a back sheet, but does not include an absorber. In addition, the crotch portion 4C is joined to the outer surface 4FO of the ventral portion 4F and the outer surface 4BO of the back portion 4B.

  On the other hand, in the example shown in FIG. 7C, the crotch portion 4C including the back sheet and the absorbent body is joined to the outer surface 4FO of the ventral portion 4F and the outer surface 4BO of the dorsal portion 4B. Moreover, the leg periphery sheet | seats 6L and 6R are each joined between the two sheets which comprise the ventral | abdominal part 4F, and between the two sheets which comprise the back | dorsal part 4B.

  Next, the dimensions of the cutouts 6LC and 6RC will be described with reference to FIG. In the first embodiment according to the present invention, the longitudinal length LNC of the cutouts 6LC and 6RC is not more than 1/3 of the longitudinal length LN1 of the diaper 1 (LNC ≦ (1/3) LN1), and the cutouts 6LC, The cutouts 6LC and 6RC are formed so that the transverse length WDC of 6RC is 1/3 or less of the transverse length WD1 of the diaper 1 (WDC ≦ (1/3) WD1).

  If it does in this way, the size of leg opening 1LL and 1LR can be made small, fully covering a wearer's body with diaper 1. Therefore, the leg-around sheets 6L and 6R can be securely adhered to the wearer's legs.

  This has been confirmed by experiments. That is, LNC ≦ (1/3) LN1 and WDC ≦ (1/3) WD1 for a plurality of diapers having different longitudinal lengths LN1 and transverse lengths WD1 such as children's diapers and adult diapers. Diapers and diapers with LNC> (1/3) LN1 or WDC> (1/3) WD1 were prepared. When the occurrence frequency of moles was confirmed for these diapers, a low frequency of leakage was obtained for diapers where LNC ≦ (1/3) LN1 and WDC ≦ (1/3) WD1. In contrast, a diaper having LNC> (1/3) LN1 or WDC> (1/3) WD1 has a high frequency of leakage.

  By the way, conventionally, a continuous body of diaper semi-finished products is prepared, a notch or notch is formed between two adjacent diaper semi-finished products, and the notch or notch is bisected, and two diapers adjacent to each other. Methods for producing disposable diapers are known, in which the semi-finished leg opening is defined by a notch or cutout. However, in this manufacturing method, when one leg-hole opening of two diaper semi-finished products adjacent to each other becomes large, the other leg-hole opening becomes small, that is, the size of the leg-hole opening may greatly vary.

  On the other hand, in each embodiment according to the present invention, the cutouts 6LC and 6RC are formed independently on the leg-hole seats 6L and 6R, respectively. Therefore, the sizes of the leg openings 1LL and 1LR can be made uniform.

  9, 10 and 11 show a second embodiment according to the present invention. Referring to FIGS. 9, 10 and 11, in the second embodiment, a single leg-hole seat 6 is provided. This leg periphery sheet | seat 6 has the transversal direction length substantially the same as the ventral | abdominal part 4F and the back | dorsal part 4B.

  The longitudinal peripheral regions 6F and 6B of the leg seat 6 are joined to substantially the entire lower edge region 4FB of the ventral portion 4F and almost the entire lower edge region 4BB of the dorsal portion 4B, respectively. As a result, the leg-hole seat 6 is disposed in the gap 7 between the ventral portion 4F and the back portion 4B.

  In particular, as shown in FIG. 10, the leg periphery sheet 6 has a pair of cutouts 6 </ b> C. Also in the second embodiment according to the present invention, each of the cutouts 6C has an elliptical shape having a long axis extending in the vertical direction.

  Also in the second embodiment according to the present invention, the outer side edge regions 6LOF and 6LOB of the left leg periphery seat 6L are joined to each other, and the outer side edge regions 6ROF and 6ROB of the right leg periphery seat 6R are joined to each other. The Further, the left side edge region 4FL and the left side edge region 4BL are joined together, and the right side edge region 4FR and the right side edge region 4BR are joined together.

  As a result, as shown in FIG. 9, a pair of leg opening 1LL and 1LR is defined by the leg seat 6.

  In the second embodiment according to the present invention, the crotch portion 4C is joined to both the ventral portion 4F and the dorsal portion 4B. However, the crotch portion 4C may be joined to one of the ventral portion 4F and the dorsal portion 4B, or may not be joined to both.

  Other configurations and operations of the second embodiment according to the present invention are the same as those of the first embodiment.

  In each of the embodiments described so far, the ventral portion 4F, the dorsal portion 4B, and the crotch portion 4C are composed of separate members. However, as shown in FIG. 12, the abdomen portion 4F and the back portion 4B and the crotch portion 4C made of the back sheet are made of a common sheet material, and the absorber AD is disposed on the sheet material. May be. In FIG. 12, the leg-hole seats 6L and 6R are omitted.

  Moreover, you may each provide a leak-proof member in the cross direction both sides of the crotch part 4C or an absorber. Each leakage preventing member includes, for example, a sheet extending outward in the transverse direction from the transverse side edge of the absorbent body, and an elastic member extending in the longitudinal direction is provided on the outer end of these sheets. As a result, the leakage can be reliably suppressed.

  Furthermore, the embodiments described so far can be combined with each other. That is, for example, in the second embodiment according to the present invention, as shown in FIG. 7A, the leg seats can be joined to the outer surfaces of the ventral portion 4F and the back portion 4B.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 1LL, 1LR Leg opening 4F Abdominal part 4B Dorsal part 4C Crotch part 6L, 6R Leg seat 6LC, 6RC Cutout 6LOF, 6LOB, 6ROF, 6ROB Outer side edge area

Claims (12)

A disposable diaper having one waist opening and a pair of leg openings,
A ventral portion, a dorsal portion, and a crotch portion are provided, and the ventral portion and the dorsal portion are vertically separated from each other when the diaper is deployed. Joined to the side part,
The diaper further comprises a pair of leg-around sheets having extensibility or stretchability,
The longitudinal peripheral edge region and the inner side edge region of one leg seat are joined to the lower edge region of the ventral portion, the lower edge region of the back portion, and the side edge region of the crotch portion, respectively, on one side of the crotch portion. , Thereby, one leg-around seat is disposed in the gap between the ventral portion and the dorsal portion on one side of the crotch portion,
The longitudinal peripheral edge region and the inner side edge region of the other leg circumference seat are joined to the lower edge region of the ventral portion and the lower edge region of the back portion and the side edge region of the crotch portion on the other side of the crotch portion, respectively. , Thereby, the other leg seat is disposed in the gap between the ventral portion and the dorsal portion on the other side of the crotch portion,
Each leg seat has a cutout that defines a leg opening.
Disposable diapers. A disposable diaper having one waist opening and a pair of leg openings,
A ventral part and a dorsal part are provided, and the ventral part and the dorsal part are separated from each other in the vertical direction when the diaper is deployed,
The diaper further comprises a leg-surrounding sheet having extensibility or stretchability,
The longitudinal peripheral areas of the leg seats are respectively joined to substantially the whole lower edge area of the ventral part and almost the whole lower edge area of the dorsal part, so that between the ventral part and the dorsal part Leg seats are placed in the gap,
The leg seat has a pair of cutouts that define a pair of leg openings.
Disposable diapers.   The disposable diaper according to claim 1 or 2, wherein the side edge regions of the ventral part and the dorsal part are joined to each other in a non-rejoinable manner.   The disposable diaper according to claim 3, wherein the side edge regions of the leg-around sheet are joined to each other in a non-rejoinable manner.   The disposable diaper according to claim 1 or 2, wherein side edge regions of the ventral portion and the dorsal portion are joined to each other so as to be rejoinable.   The disposable diaper according to any one of claims 1 to 5, wherein the leg-hole sheet is formed so that the leg-hole opening is positioned on the thigh of the wearer when worn.   The disposable diaper according to any one of claims 1 to 6, wherein the leg-around sheet has stretchability or stretchability in two directions orthogonal to each other.   The disposable diaper according to any one of claims 1 to 7, wherein the skin side surface of the leg periphery sheet is flat.   The disposable diaper according to any one of claims 1 to 8, wherein the size of the leg opening is adjustable.   The disposable diaper according to any one of claims 1 to 9, wherein the leg-hole sheet is liquid-impermeable.   The disposable diaper according to any one of claims 1 to 10, wherein the leg-hole sheet has water repellency.   The disposable diaper according to any one of claims 1 to 11, wherein each of the ventral portion and the dorsal portion includes a plurality of elastic members extending substantially parallel to each other in the transverse direction.

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