JP2016137060A - Tape-type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape-type disposable diaper that is capable of maintaining bonding firmness of a fastening tape, even if the fastening tape is attached to an extension line of a leg elastic member.SOLUTION: A tape-type disposable diaper has: an inner layer sheet 40 positioned in a skin facing surface side of a fastening tape 20 and a leg elastic member; an outer sheet 50 positioned in a skin non-facing surface side of the fastening tape 20 and the leg elastic member; and an interlayer sheet 60 positioned between the inner layer sheet 40 and the fastening tape 20. A base end 21 of the fastening tape 20 is sandwiched and bonded between the outer sheet 50 and the interlayer sheet 60, and the leg elastic member is disposed or a locus (a non-bonding part 71) of the leg elastic member originally existing therein remains, between the inner layer sheet 40 and the interlayer sheet 60.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a disposable diaper that is attached to a wearer's crotch and absorbs and holds a liquid such as urine. In particular, the present invention relates to a tape-type disposable diaper provided with a fastening tape for connecting a front body and a back body.

  Conventionally, a tape-type disposable diaper is known as a disposable diaper that is attached to the wearer's crotch and absorbs and holds a liquid such as urine (for example, Patent Document 1). Tape-type disposable diapers generally have a fastening tape attached to the left and right sides of the back body and a landing tape on the front body. The fastening tape and the landing tape can be mechanically coupled by, for example, a hook-and-loop fastener composed of a hook material (male member) and a loop material (female member). Generally, a hook material is attached to the tip of a fastening tape, and the surface of the landing tape is covered with a loop material. For this reason, the tape-type disposable diaper can be worn on the wearer's body by fastening the fastening tape provided on the back body to the landing tape provided on the front body.

  Further, in a general tape-type disposable diaper, a leg stretchable member is fixed in the stretched state along the longitudinal direction in the vicinity of the opening around the leg (see, for example, FIG. 1 of Patent Document 1). When the leg elastic member contracts, leg gathers are formed in the vicinity of the leg opening. Therefore, the leg elastic member can be arranged to improve the fit of the leg part, and urine leakage from the leg opening can be improved. Can be prevented.

  Patent Document 2 and Patent Document 3 show examples of methods for manufacturing a tape-type disposable diaper having a leg stretchable member. As shown in these documents, in the manufacturing stage of the disposable diaper, the plurality of sheet members and the leg elastic members arranged between these sheet members are each in a direction corresponding to the longitudinal direction of the disposable diaper. It forms a continuum connected to. The continuum of leg elastic members is directly coated with an adhesive before being placed between the continuums of the plurality of sheet members. At this time, in the continuous body of the leg stretchable members, portions where the adhesive is applied (adhesive application portion) and portions where the adhesive is not applied (adhesive non-application portion) are alternately formed. Moreover, the continuous body of the leg elastic member is fixed in a state where tension is applied between the sheet members constituting the disposable diaper so that the adhesive application portion is located at the crotch part of the disposable diaper. Then, the laminated body of the continuous body of the leg elastic members and the continuous body of various sheet members is finally orthogonal to the conveying direction in the adhesive non-application portion where the adhesive is not applied to the continuous body of the leg elastic members. It is cut in a direction (width direction of the disposable diaper). Thereby, an individual disposable diaper is obtained from said laminated body. Moreover, by cutting in this way, the adhesive non-applied portion of the leg elastic member loses tension and contracts, and returns to a position closer to the adhesive applied portion (so-called cut back). Thereby, a leg expansion-contraction member comes to be arrange | positioned in the appropriate position centering on the crotch part of a disposable diaper. As described above, in the method for manufacturing a tape-type disposable diaper, the cutting step for individually separating the continuous members of the sheet member and the cutting step for individually separating the continuous members of the leg elastic members are generally performed simultaneously. . Further, in the manufacturing process of the tape-type disposable diaper, a fastening tape is attached to the left and right ends of the back body of the disposable diaper in the pre-stage or the post-stage of the cutting process.

JP 2013-255848 A JP 2004-105376 A JP 2014-166719 A

  By the way, in order to shrink the adhesive non-applied portion of the leg stretchable member by cutting as described above, the adhesive non-applied portion of the leg stretchable member is made to be a sheet member so as not to disturb the shrinking action. Must be left unbonded. That is, on the extension line of the adhesive application portion of the leg stretchable member, the sheet members sandwiching the adhesive non-applied portion of the leg stretchable member need not be joined to each other. For this reason, in the manufacturing process of the disposable diaper, when the adhesive non-applied portion of the leg elastic member is cut and contracted, the sheet member follows the trajectory where the adhesive non-applied portion of the leg elastic member originally existed. A space in which the members are not joined to each other is generated. That is, the space where the sheet members are not joined exists on the extension line of the leg elastic member.

  On the other hand, a fastening tape attached to a tape-type disposable diaper is a portion that is strongly pulled by the wearer when the diaper is worn, and therefore needs to be firmly joined to the main body of the diaper. This is because if the fastening tape and the diaper main body are weak in bonding strength, when the fastening tape is pulled, the fastening tape is detached from the diaper main body and the disposable diaper cannot be attached. Here, as described above, a space where the sheet members are not joined to each other exists on the extension line of the leg stretchable member. Since such a space is a portion where the bonding strength between the sheet members is weak, if this space and the fastening tape mounting portion overlap, the bonding strength of the fastening tape to the diaper main body also decreases. For these reasons, it has been conventionally considered that a fastening tape cannot be attached to an extension line of a leg elastic member. However, it is necessary to attach the fastening tape to the left and right ends of the back of the disposable diaper, and it is difficult to change the mounting position. For this reason, in the past, adjustments have been made such that the fastening position of the leg stretchable member is positioned closer to the inner side in the width direction than the mounting position of the fastening tape so that the fastening tape attachment position and the extension line of the leg stretchable member do not overlap. Was necessary.

  On the other hand, the leg elastic member forms a leg gather along the circumference of the wearer's leg, and in order to effectively exhibit the urine leakage prevention effect by the leg gather, the leg elastic member is arranged as far as possible in the width direction. It can be said that it is preferable to arrange it along the side edge. In addition, if the leg diaper opening is formed in the crotch part of the disposable diaper, the leg stretchable member may be arranged along the leg circumference opening. It can be said that it is preferable. However, as described above, the structure of the disposable diaper has a manufacturing limitation that “fastening tape cannot be attached to the extension line of the leg elastic member”. For this reason, in order to avoid the extension line of the leg elastic member from overlapping the fastening tape, it is difficult to arrange it along the side edge on the outer side in the width direction or along the opening around the leg. It had been. As described above, the conventional disposable diaper cannot fix the leg stretchable member in the optimal position due to the limitation of manufacturing, and as a result, the urine leakage preventing effect by the leg gather cannot be exhibited to the maximum extent. There was a problem.

  Therefore, at present, there are no restrictions on manufacturing convenience, and even when the fastening tape is attached to the extension line of the leg elastic member, the tape-type disposable diaper that can maintain the fastening strength of the fastening tape can be maintained. Is required.

  The inventor of the present invention intensively studied the means for solving the conventional problems, and as a result, an intermediate sheet was interposed between the extension line of the leg elastic member and the base end portion of the fastening tape. That is, if the fastening tape base end is firmly joined between the intermediate sheet and the other sheet member, the fastening tape can be used even if the extension line of the leg elastic member and the fastening tape mounting position overlap. The bonding strength can be maintained. As a result, there are no manufacturing restrictions regarding the fixing position of the leg stretchable member, and the leg stretchable member is formed, for example, a leg gather such as a position along the side edge in the width direction or a position along the opening around the leg. Therefore, it can be freely arranged at a preferred position. Then, the present inventor has come up with the idea that the conventional problems can be solved based on such knowledge, and has completed the present invention. More specifically, the present invention has the following configuration.

The present invention relates to a tape-type disposable diaper.
The disposable diaper has, in its longitudinal direction, a front body 1 located on the stomach side of the wearer, a back body 2 located on the back side of the wearer, and a crotch 3 located between the front body 1 and the back body 2. It is divided into and.
The disposable diaper of the present invention includes the absorbent main body 10, the fastening tape 20, the leg stretchable member 30, the inner layer sheet 40, the outer layer sheet 50, and the intermediate sheet 60.
The absorptive main body 10 is a member that is disposed at least in the crotch 3 and absorbs liquid such as urine.
The fastening tape 20 is attached to extend from the left and right ends of the front body 1 or the back body 2 in the width direction, and is a member that can be engaged with an outer surface (such as a landing tape) of a disposable diaper.
The leg elastic members 30 are extendable members arranged one or more at least on both the left and right sides in the width direction of the crotch 3 so as to extend in the longitudinal direction.
The inner layer sheet 40 is a sheet member located on the skin facing surface side of the fastening tape 20 and the leg elastic member 30.
The outer layer sheet 50 is a sheet member positioned on the skin non-facing surface side of the fastening tape 20 and the leg elastic member 30.
The intermediate sheet 60 is a sheet positioned between one of the inner layer sheet 40 and the outer layer sheet 50 and the fastening tape 20.
Here, the base end portion 21 of the fastening tape 20 is sandwiched and joined between the other sheet of the inner layer sheet 40 and the outer layer sheet 50 and the intermediate sheet 60.
In addition, the leg elastic member 30 is disposed between the one sheet and the intermediate sheet 60, or the locus where the leg elastic member 30 originally exists remains.

  As described above, the disposable diaper of the present invention is provided with the intermediate sheet 60 between the leg stretchable member 30 or its locus and the fastening tape 20. For example, the fastening tape 20 is sandwiched and joined between the inner layer sheet 40 and the intermediate sheet 60. For this reason, even if it is a case where the fixing | fixed site | part of the fastening tape 20 overlaps with the leg expansion-contraction member 30 or its locus | trajectory, fixing strength can be maintained. The conventional disposable diaper has a manufacturing convenience restriction that “fastening tape cannot be attached to the extension line of the leg elastic member”. However, by providing the intermediate sheet 60 described above, the disposable disposable diaper of the present invention can be used. Diapers eliminate these restrictions. Therefore, the disposable diaper of this invention can arrange | position the leg expansion-contraction member 30 in a free position. For example, although the fastening tape 20 is attached to the left and right ends in the width direction of the disposable diaper, the leg stretchable member 30 can be arranged so as to overlap with the fastening tape 20. In particular, the left and right ends of the disposable diaper in the width direction are portions that contact the circumference of the wearer's leg, and the leg stretchable member 30 is disposed in this portion, thereby forming a leg gather that is in close contact with the wearer's leg. can do. Thereby, it is possible to effectively prevent urine leakage from the opening around the leg of the disposable diaper. Therefore, by providing the intermediate sheet 60, the bonding strength can be maintained even when the fastening tape 20 overlaps the leg elastic member 30 or its trajectory, and as a result, an appropriate position having a high urine leakage prevention effect. The leg elastic member 30 can be freely arranged.

  In the disposable diaper of the present invention, the base end portion 21 of the fastening tape 20 is preferably joined to a position overlapping the leg elastic member 30 or its locus. As described above, the fastening tape 20 and the leg elastic member 30 are interlocked by attaching the fastening tape 20 to a position close to the leg elastic member 30. That is, when the fastening tape 20 is pulled at the time of wearing, the leg elastic member 30 is extended in conjunction with this. Thus, for example, by strongly pulling the fastening tape 20, the leg elastic member 30 can be strongly tightened with respect to the wearer's leg portion, so that it is easy to adjust the adhesion of the portion around the leg. Moreover, since the clearance gap between a disposable diaper and a wearer's leg part can be eliminated by interlocking the fastening tape 20 and the leg expansion-contraction member 30, the urine leak from the leg periphery opening part 4 can be prevented effectively. .

  In the disposable diaper of the present invention, a non-joining portion 71 extending in the longitudinal direction along the extension line of the leg elastic member 30 may be formed between the one sheet and the intermediate sheet 60 described above. The non-joint part 71 here becomes the above-described “trajectory in which the leg elastic member 30 originally exists”.

  The disposable diaper of the present invention may have leg openings 4 formed on the left and right sides of the crotch 3 in the width direction. In this case, the leg elastic member 30 is preferably disposed around the leg opening 4. That is, it is preferable that the leg stretchable member 30 is disposed so as to be curved or bent along the shape of the outer edge of the leg-hole opening 4 (for example, an arc shape). Thus, by arranging the leg stretchable member 30 along the leg opening 4, the leg gather can be brought into close contact with the wearer's leg. For this reason, the urine leakage from the leg periphery opening part 4 can be prevented effectively. However, the leg expansion / contraction member 30 does not need to be formed in the same shape as the leg-hole opening 4, and may be any one that is curved to some extent and arranged around the leg-hole opening 4.

  In the disposable diaper of the present invention, the intermediate sheet 60 is preferably bonded to the inner layer sheet 40 and the outer layer sheet 50. Thus, by fastening the intermediate sheet 60 to the inner layer sheet 40 and the outer layer sheet 50, the fastening tape 20 can be firmly held by the intermediate sheet 60.

  In the disposable diaper of the present invention, it is preferable that a plurality of leg elastic members 30 are arranged on each of the left and right sides in the width direction. In addition, the width direction spacing between the plurality of leg elastic members 30 is such that the distance at the end of the leg elastic member 30 on the rear body 2 side is narrower than the distance at the longitudinal center of the leg elastic member 30. It is preferable that Thus, by narrowing the space between the leg elastic members 30 at the end on the back body 2 side, the force when the fastening tape 20 is pulled is collected and transmitted to the plurality of leg elastic members 30. Is done. For this reason, the interlocking | linkage of the fastening tape 20 and the leg expansion-contraction member 30 can be improved. Moreover, the adhesiveness of the wearer's leg vicinity vicinity can be improved by narrowing the space | interval of the leg elastic members 30 in the edge part of the back body 2 side.

  The tape-type disposable diaper according to the present invention can maintain the fastening strength of the fastening tape even when the fastening tape is attached to the extension line of the leg stretchable member. As a result, the degree of freedom of the arrangement position of the leg expansion / contraction member increases, and the leg expansion / contraction member can be arranged at a suitable position having a high urine leakage prevention effect.

FIG. 1 is a plan view showing an example of a tape-type disposable diaper according to the first embodiment. FIG. 2A is a cross-sectional view taken along line AA shown in FIG. Further, FIG. 2B is an enlarged view inside the broken line frame shown in FIG. FIG. 3 is a cross-sectional view taken along line BB shown in FIG. FIG. 4 is a schematic diagram showing an example of a manufacturing process of a tape-type disposable diaper. FIG. 5 is an enlarged schematic view of the fastening tape and the leg elastic member. FIG. 6 is a sectional view of a tape-type disposable diaper according to the second embodiment. FIG. 7 is a sectional view of a tape-type disposable diaper according to the third embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. This invention is not limited to the form demonstrated below, The thing suitably changed in the range obvious to those skilled in the art from the following forms is also included.

In the present specification, the “longitudinal direction” means a direction connecting the front body and the back body of the disposable diaper. The “width direction” means a direction orthogonal to the longitudinal direction in a plane. In the drawings of the present application, the “longitudinal direction” is indicated by the Y axis, and the “width direction” is indicated by the X axis.
In the present specification, the “skin facing surface” means a surface facing the wearer's skin when the disposable diaper is worn. The “non-skin facing surface” means a surface that does not face the wearer's skin when wearing a disposable diaper, that is, a surface opposite to the skin facing surface.
In the present specification, “A to B” means “A or more and B or less”.

  FIG. 1 schematically shows a development view of a tape-type disposable diaper 100 according to the first embodiment of the present invention. As shown in FIG. 1, the disposable diaper 100 is located in the longitudinal direction between a front body 1 located on the abdomen side of the wearer, a back body 2 located on the back side of the wearer, and between them. The crotch part 3 is in contact with the inseam of the wearer. Moreover, in this embodiment, the leg periphery opening part 4 is formed in the width direction right and left both sides of the crotch part 3 along the shape of a wearer's leg part. The outer edge of the leg opening 4 is formed in an arc shape, for example. For this reason, the disposable diaper 100 is a so-called hourglass in which the width (length in the width direction) is narrow at the portion of the crotch 3 where the leg opening 4 is formed, and the width at the front body 1 and the back body 2 is wide. The shape of the mold. In addition, the front flap 1 and the back cap 2 that extend outward in the width direction are side flaps 5.

  Further, the tape-type disposable diaper according to the present embodiment is worn by fastening the fastening tape 20 attached to the side flap 5 of the back body 2 to the landing tape 80 provided on the outer surface of the front body 1. It is worn on the person's inseam. However, in the tape-type disposable diaper, the fastening tape 20 can be attached to the side flap 5 of the front body 1 and the landing tape 80 can be provided on the back body 2. Below, the disposable diaper of this invention is demonstrated taking the form in which the fastening tape 20 was attached to the back body 2 as an example.

  2 and 3 are cross-sectional views of a tape-type disposable diaper 100. FIG. 2 is a cross-sectional view taken along line AA shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB shown in FIG. As shown in FIGS. 1 to 3, the tape-type disposable diaper 100 basically includes an absorbent main body 10, a fastening tape 20, an inner layer sheet 40, an outer layer sheet 50, a leg stretchable member 30, An intermediate sheet 60 is provided. In the absorbent main body 10, the left and right side portions in the width direction of the skin facing surface are covered with the inner layer sheet 40, and the entire surface of the skin non-facing surface is covered with the outer layer sheet 50. The inner layer sheet 40 and the outer layer sheet 50 extend outward in the width direction of the absorbent main body 10. The fastening tape 20 and the leg elastic member 30 are sandwiched between the extended portion of the inner layer sheet 40 and the extended portion of the outer layer sheet 50. The fastening tape 20 is attached to the left and right ends of the back body 2 of the disposable diaper 100. The leg stretchable members 30 are disposed on both the left and right sides of the crotch part 3 of the disposable diaper 100 and extend in the longitudinal direction with the crotch part 3 as a center. Furthermore, in the present invention, the intermediate sheet 60 is interposed at a position corresponding to between the fastening tape 20 and the leg elastic member 30 when viewed in the thickness direction. Below, these structural members of the disposable diaper 100 are demonstrated in detail.

  The absorbent main body 10 is a member for absorbing and holding liquid such as urine excreted by the wearer. For this reason, the absorptive main body 10 is arranged in the center in the width direction and has a shape extending in the longitudinal direction from the crotch 3 to the front body 1 and the back body 2. As shown in FIGS. 2 and 3, the absorbent main body 10 basically includes a top sheet 11, a back sheet 12, and an absorber 13.

  The top sheet 11 is a member that is in direct contact with the skin of the wearer's crotch and allows liquid such as urine to pass through the absorbent body 13. For this reason, the top sheet 11 is made of a liquid-permeable material having high flexibility. Moreover, the top sheet 11 is arrange | positioned so that the skin opposing surface of the absorber 13 may be coat | covered. Examples of the liquid permeable material constituting the top sheet 11 are a woven fabric, a non-woven fabric, or a porous film. Moreover, as the top sheet 11, it is good also as, for example, using the fiber of the thermoplastic resin like polypropylene, polyethylene, polyester, nylon, and making it the nonwoven fabric further, and making it into a nonwoven fabric.

  The back sheet 12 is a member for preventing the liquid that has passed through the top sheet 11 and absorbed by the absorber 13 from leaking to the outside of the diaper. For this reason, the back sheet 12 is made of a liquid-impermeable material. Further, the back sheet 12 covers the non-skin facing surface of the absorber 13 in order to prevent liquid leakage from the bottom surface of the absorber 13. An example of the impermeable material constituting the back sheet 12 is a liquid impermeable film made of polyethylene resin. In particular, as the back sheet 12, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed in order to ensure air permeability while maintaining liquid impermeability.

  The absorber 13 is a member for absorbing liquid such as urine. The absorber 13 is disposed between the liquid-permeable top sheet 11 and the liquid-impermeable back sheet 12. The absorber 13 can be comprised with a well-known absorptive material. As an absorptive material, it is good also as using a fluff pulp, a super absorbent polymer, or a hydrophilic sheet, for example. In addition, as the absorbent material, one kind of fluff pulp, a super absorbent polymer, or a hydrophilic sheet may be used alone, or two or more kinds may be used in combination. The absorbent material is usually used in the form of a single layer or a plurality of layers. As shown in FIGS. 2 and 3, the top sheet 11 and the back sheet 12 are joined to each other around the absorber 13. As a result, the absorber 13 is surrounded by the joint between the top sheet 11 and the back sheet 12.

  The inner layer sheet 40 is a sheet member that covers both the left and right sides in the width direction of the skin facing surface of the absorbent main body 10. Further, the left and right inner layer sheets 40 extend outward in the width direction of the absorbent main body 10 to form the leg-hole openings 4 and the side flaps 5. In the present embodiment, it is preferable to employ a sheet member having water repellency and air permeability as the inner layer sheet 40. As the inner layer sheet 40, for example, a nonwoven fabric sheet obtained by a production method such as card embossing or spunbonding can be used, and it is particularly preferable to use a nonwoven fabric sheet such as SMS or SMMS having high waterproofness and air permeability.

  Further, the inner layer sheet 40 forms three-dimensional gathers on both the left and right sides in the width direction of the skin facing surface of the absorbent main body 10. The three-dimensional gather stands up along both side edges of the absorbent main body 10 and functions as a leak-proof wall that prevents side leakage of urine. That is, one or a plurality of three-dimensional gather elastic members 41 are fixed to the end portion on the inner side in the width direction of the inner layer sheet 40 in an extended state along the longitudinal direction. For this reason, when the three-dimensional gather elastic member 41 contracts, the end portion of the inner layer sheet 40 stands to form a three-dimensional gather.

  The outer layer sheet 50 is a sheet member that covers the entire skin non-facing surface of the absorbent main body 10. By providing the outer layer sheet 50, the back sheet 12 of the absorbent main body 10 can be reinforced to improve its feel. For this reason, as a material for forming the outer layer sheet 50, it is preferable to use a non-woven fabric having a good touch. As with the inner layer sheet 40, the outer layer sheet 50 extends outward in the width direction of the absorbent main body 10 to form the leg-hole opening 4 and the side flap 5. In addition, the outer layer sheet 50 and the inner layer sheet 40 are basically bonded to each other around the absorbent main body 10 and are firmly bonded so as not to peel off. However, between the outer layer sheet 50 and the inner layer sheet 40, a fastening tape 20, a leg stretchable member 30, an intermediate sheet 60, and the like described below are interposed.

  The fastening tape 20 is a member for connecting the back body 2 and the front body 1 of a disposable diaper. The fastening tape 20 is attached so as to extend from the left and right ends of the rear body 2 in the width direction. For this reason, the fastening tape 20 has the base end part 21 fixed with respect to a diaper main body, and the front-end | tip part 22 extended from a diaper main body. In addition, the fastening tape 20 is provided at least as a pair of left and right, and for example, two pairs of left and right can be provided as shown in FIG. As shown in FIG. 2, the fastening tape 20 has a base end 21 sandwiched between the inner layer sheet 40 and the outer layer sheet 50.

  As shown in the sectional view of FIG. 2, the fastening tape 20 includes a base sheet 23 and a hook member 24. The base sheet 23 is a sheet member that forms the outer shape of the fastening tape 20, and forms a base end portion 21 that is fixed to the diaper main body and a distal end portion 22 that extends from the diaper main body. The hook member 24 is a member attached to the skin facing surface of the front end portion 22 of the base sheet 23 and mechanically engages with a loop member of a landing tape 80 provided on the outer surface of the front body 1. As the base material sheet 23, well-known nonwoven fabrics, such as a spun bond, SMS, SMMS, a card embossing, a resin bond, can be employ | adopted, for example. In addition, as the material of the hook material 24, for example, synthetic fibers made of polyolefin (polyethylene, polypropylene, etc.), polyester, aliphatic polyamide, and other thermoplastic resins can be used. In addition, examples of the shape of the many protrusions formed on the hook material 24 include a bowl shape, a mushroom shape, and a bowl shape.

  The intermediate sheet 60 is a sheet member for reinforcing the bonding state of the fastening tape 20 to the diaper body. In the embodiment shown in the cross-sectional view of FIG. 2, the intermediate sheet 60 is disposed between the fastening tape 20 and the outer layer sheet 50. For this reason, in this embodiment, it has the structure where the inner layer sheet 40, the fastening tape 20, the intermediate sheet 60, and the outer layer sheet 50 were laminated | stacked in order from the skin opposing surface side. As shown in FIG. 1, in the present embodiment, the intermediate sheet 60 is locally disposed on the left and right side flaps 5 of the back body 2 to which the fastening tape 20 is attached. Although the material of the sheet member which comprises the intermediate sheet 60 is not specifically limited, For example, the nonwoven fabric generally used as a sheet member which comprises a disposable diaper, a polyethylene film, etc. can be used.

  Here, as shown in the enlarged view of FIG. 2B, the base end portion 21 of the fastening tape 20 is sandwiched and joined between the intermediate sheet 60 and the inner layer sheet 40. For example, when the fastening tape 20 is joined between the intermediate sheet 60 and the inner layer sheet 40, a known adhesive such as a hot-melt adhesive can be used, or it can be fused by heat sealing or sonic sealing. It is good. Further, the intermediate sheet 60 is joined to the fastening tape 20, and at the same time, directly joined to the inner layer sheet 40 in an area where it does not overlap the fastening tape 20. That is, the intermediate sheet 60 is bonded to the fastening tape 20 in a region overlapping with the fastening tape 20, and is bonded to the inner layer sheet 40 in a region not overlapping with the fastening tape 20. As described above, the fastening tape 20 is firmly joined between the inner layer sheet 40 and the intermediate sheet 60, so that the fastening tape 20 cannot be easily pulled out even when the diaper is pulled strongly. Yes.

  On the other hand, as shown in the enlarged view of FIG. 2B, the intermediate sheet 60 is not joined to the outer layer sheet 50 entirely. That is, the intermediate sheet 60 is bonded to the outer layer sheet 50 so that the non-bonded portion 71 is at least partially formed. In this embodiment, as shown in FIG. 2B, a non-joining portion 71 and joining portions 72 located on both sides in the width direction of the non-joining portion 71 are provided between the intermediate sheet 60 and the outer layer sheet 50. Is formed. That is, the intermediate sheet 60 and the outer layer sheet 50 are bonded at the bonding portion 72, and the intermediate sheet 60 and the outer layer sheet 50 are dissociated at the non-bonding portion 71 formed between the bonding portions 72. Moreover, this non-joining part 71 continues continuously to the edge of the intermediate sheet 60 along the longitudinal direction of the disposable diaper. For this reason, in the part in which the non-joining part 71 was formed, the space extended in the longitudinal direction in which the intermediate sheet 60 and the outer layer sheet 50 are not joined is formed. As will be described in detail later, the non-joining portion 71 corresponds to a locus where the leg stretchable member 30 originally existed in the manufacturing stage of the disposable diaper 100.

  Further, in the present invention, as shown in FIG. 2B, the locus of the leg stretchable member 30 (that is, the non-joined portion 71 of the intermediate sheet 60 and the outer layer sheet 50) and the base end portion 21 of the fastening tape 20 are , Overlapping in the thickness direction. Here, unlike the present invention. In the case where the intermediate sheet 60 is not provided, when the trajectory (non-joining portion 71) of the leg elastic member 30 and the base end portion 21 of the fastening tape 20 overlap, the non-joining portion 71 is not present between the fastening tape 20 and the outer layer sheet 50. Will be formed. Then, since the location where the fastening tape 20 is not joined to the outer layer sheet 50 is generated, the joining strength of the fastening tape 20 is weakened, and there is a possibility that the fastening tape 20 may come off when the fastening tape 20 is pulled strongly. On the other hand, in the present invention, as described above, the intermediate sheet 60 is interposed between the fastening tape 20 and the outer layer sheet 50. Therefore, the fastening tape 20 is entirely bonded between the inner layer sheet 40 and the intermediate sheet 60, and the bonding strength is maintained. On the other hand, in the present invention, the trajectory of the leg stretchable member 30, that is, the non-joined portion 71 is formed between the intermediate sheet 60 and the outer layer sheet 50. For this reason, it can avoid that the joining strength of the fastening tape 20 falls under the influence of this non-joining part 71. FIG. Therefore, in the present invention, as shown in FIG. 2B, the locus of the leg stretchable member 30 (that is, the non-joined portion 71 of the intermediate sheet 60 and the outer layer sheet 50) and the proximal end portion 21 of the fastening tape 20 are , There is no problem even if they overlap in the thickness direction.

  The leg elastic members 30 are elastic elastic members arranged one or more on the left and right sides of the crotch 3 in the width direction. The leg elastic member 30 is sandwiched and fixed between the inner layer sheet 40 and the outer layer sheet 50 in a state of extending in the longitudinal direction on both the left and right sides of the crotch part 3. For this reason, when the leg elastic member 30 contracts, wrinkles are generated in the inner layer sheet 40 and the outer layer sheet 50, and the wrinkles become leg gathers. By forming the leg gathers, the fit of the wearer's skin and the disposable diaper is improved around the legs of the wearer, so that urine leakage from the leg opening 4 can be prevented. The leg elastic members 30 need only be arranged one by one on the left and right, and may be two or more, or may be three or more.

  As shown in FIG. 1, in the present embodiment, the leg elastic member 30 is disposed in the vicinity of the leg-hole opening 4 formed in the crotch part 3. For example, it is preferable that one or more leg elastic members 30 are arranged in a range within 20 mm from the outer edge of the leg-hole opening 4. In particular, in this embodiment, the leg expansion / contraction member 30 is disposed so as to follow the shape of the leg opening 4. That is, in the example shown in FIG. 1, the outer edge of the leg opening 4 is formed in a curved shape that bulges inward in the width direction. For this reason, the leg elastic member 30 is formed in a curved shape that bulges inward in the width direction so as to follow the curve of the leg opening 4. Further, as shown in FIG. 1, the longitudinal end of the leg elastic member 30 may reach the side flaps 5 of the front body 1 and / or the back body 2. Further, the leg elastic member 30 may extend in the longitudinal direction along the side edge of the side flap 5 of the front body 1 and / or the back body 2. Thus, in this invention, it is preferable that the leg expansion-contraction member 30 is arrange | positioned in the range within 20 mm from a side edge so that the side edge vicinity of the width direction outer side of the disposable diaper 100 may be followed. By disposing the leg stretchable member 30 along the lateral edge of the disposable diaper 100 in the width direction, it is possible to improve the fit of the disposable diaper with respect to both legs of the wearer, and to prevent urine leakage from around the legs. Can be prevented.

  As shown in FIG. 1, in the present invention, the leg elastic member 30 is arranged along the leg opening 4, so that the proximal end portion of the fastening tape 20 is on the extension line of the leg elastic member 30. 21 will exist. As described above, with conventional tape-type disposable diapers, if the fastening tape is attached to the extension line of the leg stretchable member, the bonding strength of the fastening tape is lowered for the convenience of manufacturing, and such an arrangement is impossible. It had been. On the other hand, in the present invention, since the intermediate sheet 60 is provided to reinforce the joining state of the fastening tape 20, the fastening tape 20 can be attached on the extension line of the leg elastic member 30.

  Specifically, as shown in the cross-sectional view of FIG. 3, in the present invention, the intermediate sheet 60 described above is disposed between the fastening tape 20 and the leg elastic member 30 or an extension line thereof. That is, it can be said that the intermediate sheet 60 is interposed between the level (position in the thickness direction) where the fastening tape 20 is disposed and the level where the leg stretchable member 30 is disposed. Since the leg stretchable member 30 employs a cut-back method as a method of placing between the sheet members constituting the diaper, a non-joint portion in which the sheet member is not joined on the extension line of the leg stretchable member 30 71 will inevitably be formed. Conventionally, the non-joining portion 71 has affected the reduction in the joining strength of the fastening tape 20. On the other hand, as in the present invention, the intermediate sheet 60 is interposed between the level at which the fastening tape 20 is arranged and the level at which the leg elastic member 30 is arranged. 71 does not affect the bonding strength of the fastening tape 20. That is, as shown in the enlarged view of FIG. 2B, the non-joining portion 71 formed on the extension line of the leg elastic member 30 is formed only between the intermediate sheet 60 and the outer layer sheet 50. And the fastening tape 20 will be in the state joined sufficiently firmly by the intermediate | middle sheet 60 and the inner layer sheet | seat 40. FIG. Thus, in the present invention, the fastening tape 20 can be attached on the extension line of the leg elastic member 30 by providing the intermediate sheet 60 and reinforcing the joining state of the fastening tape 20.

  Moreover, as FIG. 1 shows, the leg expansion-contraction member 30 may be arrange | positioned so that it may overlap with the intermediate sheet 60 in the thickness direction. In the example shown in FIG. 1, the tip of the leg body 2 on the rear body 2 side overlaps the intermediate sheet 60 in the thickness direction. Moreover, although illustration is abbreviate | omitted, the leg elastic member 30 may be extended further in the longitudinal direction from the state shown in FIG. 1, and the leg elastic member 30 and the fastening tape 20 may be made to overlap in the thickness direction. However, in the present invention, it is only necessary that the intermediate sheet 60 and the fastening tape 20 exist on the extension line of the leg elastic member 30, and the intermediate sheet 60 and the fastening tape 20 do not have to overlap the leg elastic member 30 itself. .

  Then, with reference to FIG. 4, the manufacturing process of the tape-type disposable diaper which concerns on this invention is demonstrated. As shown in FIG. 4, in the manufacturing process of the tape-type disposable diaper 100, the leg stretchable member 30, the inner layer sheet 40, and the outer layer sheet 50 constituting the disposable diaper 100 are each in the transport direction (the longitudinal direction of the disposable diaper). Is equivalent to a belt-like continuum. On the other hand, the fastening tape 20 and the intermediate sheet 60 are individually attached at positions corresponding to the side flaps 5 of the back body 2 of the disposable diaper.

  Here, as shown in FIG. 4, a continuous body of leg stretchable members 30 is provided with an adhesive application portion 91 to which an adhesive is applied and an adhesive that is not applied with an adhesive along the conveying direction. The portions 92 are alternately formed. And the continuous body of the leg elastic member 30 is arrange | positioned between the continuous body of the inner layer sheet 40, and the continuous body of the outer layer sheet | seat 50 so that the adhesive agent application part 91 may be located in the crotch part 3 of a disposable diaper. . On the other hand, the continuous body of the leg elastic members 30 is such that the adhesive non-applying portion 92 is located in the front body 1 and the back body 2 of the disposable diaper. At this time, the adhesive non-application part 92 of the continuous body of the leg elastic member 30 will be in the state which overlapped with the fastening tape 20 and the intermediate sheet 60. FIG.

  The laminated body constituted by a continuous body of various members as described above is finally in a direction (width direction of the disposable diaper) perpendicular to the transport direction at a position corresponding to the boundary between the front body 1 and the back body 2. Disconnected. Thereby, the individual disposable diaper 100 is obtained from said laminated body. The cutting position corresponds to the adhesive non-applied portion 92 where the adhesive is not applied to the continuous body of the leg elastic members 30. Therefore, by cutting in this way, the adhesive non-applied portion 92 of the leg elastic member 30 loses tension and contracts and returns to a position near the adhesive applied portion 91 (so-called cut back). . For this reason, the leg expansion / contraction member 30 does not exist in the place where the adhesive non-applied portion 92 of the leg expansion / contraction member 30 originally existed, and as a result, a space where no adhesive or the like is applied is formed. . Thus, the location where the adhesive non-applied portion 92 of the leg elastic member 30 originally exists corresponds to the above-mentioned “trajectory of the leg elastic member 30” and “non-joining portion 71”. For this reason, the “trajectory of the leg elastic member 30” and the “non-joining portion 71” remain on the extension line of the leg elastic member 30.

  Then, with reference to FIG. 5, the preferable form of the tape-type disposable diaper 100 which concerns on this invention is demonstrated. FIG. 5 shows an enlarged portion of the disposable diaper 100 where the fastening tape 20, the leg stretchable member 30, and the intermediate sheet 60 are arranged. In the example shown in FIG. 5, a total of three leg elastic members 30 are arranged so as to be arranged at equal intervals in the width direction. Each leg stretchable member 30 has a shape that follows the shape of the leg opening 4 and has a straight portion and a curved portion.

In FIG. 5, of the leg elastic members 30 widthwise spacing between the spacing in the longitudinal direction of the center (i.e. interval at the crotch portion 3), is indicated by reference numeral D _1. Further, in FIG. 5, of the leg elastic members 30 widthwise of the distance between the spacing of the end portion in the longitudinal direction of the back portion 2 side, indicated at D _2. In this case, the interval D ₂ is preferably narrower than the interval D ₁ (D ₂ <D ₁ ). For example, distance _{D 2,} to the distance _{D 1,} 10% to 80%, or it is preferably 20% to 50%. Specifically, the distance _{D 1} is preferably 3 mm to 10 mm, spacing _{D 2} is preferably 1 mm to 5 mm. Further, as shown in FIG. 5, in the portion where the leg elastic members 30 are curved, the distance between the leg elastic members 30 gradually decreases toward the end on the back body 2 side. . Thus, it is preferable that the space | interval of the leg expansion-contraction members 30 is what becomes gradually narrow in a curved part.

In the present invention, the fastening tape 20 and the leg elastic member 30 are interlocked with each other by attaching the fastening tape 20 and the leg elastic member 30 to each other. That is, when the fastening tape 20 is pulled at the time of wearing, the leg elastic member 30 is extended in conjunction with this. Accordingly, for example, by strongly pulling the fastening tape 20, the leg elastic member 30 can be strongly tightened with respect to the wearer's leg portion, so that the adhesion of the portion around the leg can be easily adjusted. Force at this time, so as to satisfy the above D _{2 <D 1} conditions, by narrowing the leg elastic members 30 spacing D ₂ between at the end of the back body 2 side, when pulled fastening tape 20 Are transmitted to the plurality of leg elastic members 30 in a concentrated manner. For this reason, the interlocking | linkage of the fastening tape 20 and the leg expansion-contraction member 30 can be improved.

  Further, in the example shown in FIG. 5, the fastening tape 20 and the leg elastic member 30 do not overlap each other, and there is a gap in the longitudinal direction between the two. Here, in FIG. 5, the distance in the longitudinal direction between the fastening tape 20 and the leg elastic member 30 is indicated by a symbol S. For example, the interval S is preferably 1 mm to 30 mm, or 1 mm to 20 mm. Moreover, although illustration is abbreviate | omitted, in this invention, the fastening tape 20 and the leg expansion-contraction member 30 may overlap. In this case, the interval S is 0 mm. Thus, for example, the fastening tape 20 and the leg elastic member 30 are more effectively interlocked by setting the longitudinal interval S between the fastening tape 20 and the leg elastic member 30 to be within 30 mm (preferably within 20 mm). Can do.

  Next, a second embodiment of the tape-type disposable diaper according to the present invention will be described with reference to FIG. FIG. 6: has shown sectional drawing of the tape-type disposable diaper which concerns on 2nd Embodiment. The cross-sectional view of FIG. 6 is a cross-sectional view at the same position as FIG. 2 described above. In the second embodiment, description of the same configuration as that of the first embodiment described above will be omitted, and description will be made focusing on a configuration different from that of the first embodiment.

  As shown in FIG. 6, in the second embodiment, unlike the first embodiment (see FIG. 2), the intermediate sheet 60 is disposed between the fastening tape 20 and the inner layer sheet 40. . For this reason, the fastening tape 20 is sandwiched between the outer layer sheet 50 and the intermediate sheet 60 and firmly joined. On the other hand, between the inner layer sheet 40 and the intermediate sheet 60, a non-joint portion 71 corresponding to the locus where the leg stretchable member 30 originally existed is formed.

  In the first embodiment, the fastening tape 20 is disposed on the inner layer sheet 40 side, and the intermediate sheet 60 is disposed on the outer layer sheet 50 side. On the other hand, in the second embodiment, the fastening tape 20 is disposed on the outer layer sheet 50 side, and the intermediate sheet 60 is disposed on the inner layer sheet 40 side. As described above, the positions of the fastening tape 20 and the intermediate sheet 60 can be interchanged.

  Next, a third embodiment of the tape-type disposable diaper according to the present invention will be described with reference to FIG. FIG. 7 is a cross-sectional view of a tape-type disposable diaper according to the third embodiment, showing a cross-section at the same position as in FIG. 2 described above. As shown in FIG. 7, in the third embodiment, unlike the first embodiment, the intermediate sheet 60 extends over the entire width direction of the disposable diaper. That is, the intermediate sheet 60 is also interposed between the absorbent main body 10 and the outer layer sheet 50. Although not shown in FIG. 7, the intermediate sheet 60 may extend over the entire length of the disposable diaper. Thus, the intermediate sheet 60 can be arranged not only in the range where it overlaps with the fastening tape 20 but also in a wide range in the width direction and the longitudinal direction. For example, the intermediate sheet 60 can have the same width, the same length, and the same shape as the outer layer sheet 50.

  As mentioned above, in this specification, in order to express the content of this invention, embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  The present invention relates to a tape-type disposable diaper. For this reason, this invention can be utilized suitably in the manufacturing industry of a disposable diaper.

DESCRIPTION OF SYMBOLS 1 ... Front body 2 ... Back body 3 ... Crotch part 4 ... Opening around leg 5 ... Side flap 10 ... Absorbent main body 11 ... Top sheet 12 ... Back sheet 13 ... Absorber 20 ... Fastening tape 21 ... Base end part 22 ... Tip portion 23 ... base material sheet 24 ... hook material 30 ... leg stretchable member 40 ... inner layer sheet 50 ... outer layer sheet 60 ... intermediate sheet 71 ... non-joining part 72 ... joining part 80 ... landing tape 91 ... adhesive application part 92 ... adhesion Agent non-applying part 100 ... disposable diaper

Claims (6)

A front body (1) located on the abdomen side of the wearer, a back body (2) located on the back side of the wearer, and a crotch part located between the front body (1) and the back body (2) (3) and is a tape-type disposable diaper divided in the longitudinal direction,
An absorptive body (10) disposed at least in the crotch (3);
Fastening tape (20) attached to extend from the left and right ends in the width direction of the front body (1) or the back body (2);
One or a plurality of leg stretchable members (30) arranged to extend in the longitudinal direction on at least the left and right sides in the width direction of the crotch part (3);
An inner layer sheet (40) located on the skin facing surface side of the fastening tape (20) and the leg elastic member (30);
An outer layer sheet (50) located on the skin non-facing surface side of the fastening tape (20) and the leg elastic member (30);
An intermediate sheet (60) positioned between one of the inner layer sheet (40) and the outer layer sheet (50) and the fastening tape (20);
A proximal end portion (21) of the fastening tape (20) is sandwiched and joined between the other sheet of the inner layer sheet (40) and the outer layer sheet (50) and the intermediate sheet (60). And
The leg elastic member (30) is disposed between the one sheet and the intermediate sheet (60), or the locus where the leg elastic member (30) originally existed remains disposable. Diapers. The disposable diaper of Claim 1. The base end part (21) of the said fastening tape (20) is joined to the position which overlaps with the said leg elastic member (30) or the said locus | trajectory. Between the one sheet and the intermediate sheet (60), a non-joining part (71) extending in the longitudinal direction along the extension line of the leg elastic member (30) is formed,
The disposable diaper according to claim 1, wherein the non-joining part (71) is the locus. Leg openings (4) are formed on the left and right sides of the crotch part (3) in the width direction,
The disposable diaper according to any one of claims 1 to 3, wherein the leg stretchable member (30) is arranged around the leg opening (4). The disposable diaper according to any one of claims 1 to 4, wherein the intermediate sheet (60) is partially joined to the inner layer sheet (40) and the outer layer sheet (50). A plurality of the leg elastic members (30) are arranged on each of the left and right sides in the width direction,
The distance between the plurality of leg elastic members (30) in the width direction is the distance between the leg elastic members (30) at the end of the back body (2) side of the leg elastic members (30). The disposable diaper according to any one of claims 1 to 5, wherein the disposable diaper is narrower than an interval at a center in a longitudinal direction.

Images