JP2007167192A - Pants-type disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pants-type disposable diaper having fastening sections used for fastening the diaper for disposal whose functions are not restricted by the quality of an external packing material of the diaper. <P>SOLUTION: The pants-type disposable diaper 1 comprises a substantially longitudinal absorber 10 having a liquid-permeable surface sheet 2, a liquid-impermeable or water-repellent rear sheet 3, and a liquid-holding absorbent core 4 sandwiched between the sheets 2 and 3, the elastic external packing material 11 arranged on a side of the absorber 10 that does not come into contact with the skin, and the plurality of adherend selective fastening sections 7 which substantially do not adhere to a nonwoven fabric or the skin of a wearer. The adherend selective fastening sections 7 are arranged on the external packing material 11. When disposing the diaper, the adherend selective fastening sections 7 are fastened with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pants-type disposable diaper, and more particularly, to a pants-type disposable diaper having a fastening part for wearing at the time of disposal.

In recent years, pants-type disposable diapers having a waist opening and a pair of leg openings are known. Since this type of diaper can be worn in an upright position as in normal underwear, it is easier for a moving infant to wear than a conventional disposable disposable diaper having a tape fastening portion.
On the other hand, a pants-type disposable diaper cannot be stopped in a rounded state because there is no fastening portion even when the diaper is rounded during disposal after use. For this reason, some devices have been devised when discarding diapers.
And this applicant has previously proposed the underpants type disposable diaper which has the tape fastener of wearing at the time of disposal in patent documents 1.

  Patent Document 1 discloses a pants-type disposable diaper comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets. A pants-type disposable diaper is disclosed in which a strip-shaped tape fastener to be worn is disposed with its one end fixed in the longitudinal direction of the diaper.

Japanese National Patent Publication No. 8-510941

  In the diaper described in Patent Document 1, the tape fastener is arranged in a state of being folded in three in the length direction, and when used, the other end can be pulled to extend the length. . On the other hand, in recent years, from the viewpoint of the touch and texture of diapers, when the nonwoven fabric made of short fibers is arranged on the non-skin contact surface side of the back sheet as an outer packaging material, long fibers as represented by the spunbond method Even in the case of non-woven fabrics, the non-woven fabric, which has been processed with mild embossing conditions (low temperature, low pressure, etc.) to fix the nonwoven fabric for the purpose of improving the texture of the nonwoven fabric, is placed on the non-skin contact surface side of the back sheet as an outer packaging There are cases where it has been. When the tape fastener described in Patent Document 1 is applied to such a diaper, if the tape fastener is pulled strongly, the strength of the portion of the diaper outer packaging material to which the tape fastener is fixed is not sufficient. May be removed from the diaper, making the tape unusable when discarded.

Moreover, in the deployment type disposable diaper which has the conventional tape fastening part, a mechanical surface fastener may be used as a fastening part. This type of surface fastener engages a male material and a female material with each other. And at the time of disposal of a diaper, for example, the diaper is rolled, and a tape fastening portion provided with a male material is fastened to a nonwoven fabric as a diaper outer packaging material that becomes a female material.
The male material of the hook-and-loop fastener described above can also be a fastening part for wearing at the time of disposal even in a pants-type disposable diaper. However, if the diaper outer packaging material is formed of a non-woven fabric, the male material is used until the disposal It is necessary to provide a new device for preventing engagement with the outer packaging material, for example, provision of a masking sheet.

  Accordingly, an object of the present invention is to provide a pants-type disposable diaper having a fastening part for fastening at the time of disposal, which is not limited by the material of the diaper outer packaging material.

  The present invention has a plurality of adherend-selective fastening portions that are not substantially bonded to the nonwoven fabric and the wearer's skin, and fasten and discard the adherend-selective fastening portions. By providing a pants-type disposable diaper configured as described above, the above object is achieved.

  According to the pants-type disposable diaper having a fastening part for fastening at the time of disposal according to the present invention, the material of the diaper outer packaging material is not limited.

  Hereinafter, a preferred first embodiment of the pants-type disposable diaper of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, the pants-type disposable diaper 1 of the present embodiment (hereinafter also simply referred to as a diaper) includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3 and both. A substantially vertically long absorbent main body 10 having a liquid-retaining absorbent core 4 interposed between the sheets 2 and 3 and a non-skin contact surface side of the absorbent main body 10 and has elasticity. The outer packaging material 11 is provided.
Moreover, the diaper 1 of this embodiment has the some adherend selective fastening part 7,7 ... which is not substantially joined to a nonwoven fabric and a wearer's skin, This adherend selective fastening part 7 Is provided on the outer packaging material 11, and the adherend-selective fastening portions 7 are fastened together and discarded. In the present specification, adherend selectivity refers to the property of bonding only to a specific substance and not substantially bonding to other substances. A landing part is included.

  “Substantially does not adhere” means that the adherend-selective bonding portion 7 does not form any adhesion state with a substance other than the specific substance, and the adherend-selective bonding portion 7 Even if a bonding state is formed with a substance other than a specific substance, if even a slight relative movement occurs between the substance and the adherend-selective bonding portion 7, the bonding state is quickly The case of disappearance is also included.

  The diaper 1 of the present embodiment will be further described. As shown in FIG. 2, the outer wrapping material 11 has an hourglass shape in which both side edges are bound inward in the central portion in the longitudinal direction. The outline is defined. The diaper 1 is divided in the longitudinal direction in the unfolded state into an abdominal side A disposed on the wearer's abdomen, a back side B disposed on the dorsal side, and a crotch C positioned therebetween. In the outer packaging material 11, both side edge portions in the ventral side portion A and both side edge portions in the back side portion B are joined to each other, and the pair of side seal portions S, S and a waist opening portion are formed on the diaper 1 by the joining. 5 and a pair of leg openings 6 and 6 are formed.

  The outer packaging material 11 has a structure in which a plurality of sheets are laminated. In this embodiment, the outer packaging material 11 is composed of two nonwoven fabrics, that is, the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13 disposed on the inner surface side of the outer layer nonwoven fabric 12. The outer layer nonwoven fabric 12 forms the outer surface of the diaper 1. The inner layer nonwoven fabric 13 is joined to the outer layer nonwoven fabric 12 by a predetermined means on the inner surface side of the outer layer nonwoven fabric 12. The outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13 are preferably both water-repellent in view of the liquid oozing property. Details of the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13 will be described later in detail.

  A plurality of waist elastic members 51, 51 are arranged along the width direction of the front and rear end portions of the outer packaging material 11 along the front and rear end edges. The waist elastic members 51 and 51 are sandwiched and fixed in an expanded state by the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13. Each waist part elastic member 51,51 is the edge part of both elastic members 51,51, when the both-sides edge of the stomach side part A of the diaper 1 and the both-sides edge of the back side part B are mutually joined (joining part). They are arranged so as to overlap each other, or the end portions of both elastic members 51, 51 are continuously arranged up to both joint portions. As a result, as shown in FIG. 1, a substantially continuous ring-shaped waist gather is formed in the vicinity of the waist opening 5 of the diaper 1.

  The outer packaging material 11 extends outward from the front and rear end edges of the absorbent main body 10, and the extended portion is folded back to the absorbent main body 10 side. The folded outer packaging material 11 covers the front and rear end portions of the absorbent main body 10 (that is, the top sheet 2 at the front and rear end portions of the absorbent main body 10).

  Thus, in the diaper 1 of the present embodiment, a material having elasticity is used as the outer packaging material 11. As described above, the outer packaging material 11 is composed of a two-layer sheet, that is, a laminated structure of the outer layer nonwoven fabric 12 and the inner layer nonwoven fabric 13. Of the two-layer sheets, at least one sheet, in this embodiment, the outer layer nonwoven fabric 12 is made of a stretchable nonwoven fabric. Although the inner layer nonwoven fabric 13 which is the other sheet does not have stretchability, it has stretchability. Thereby, the outer packaging material 11 has elasticity in at least the diaper width direction. Since the outer packaging material 11 has elasticity in at least the diaper width direction, the diaper 1 can be held on the wearer's body with the entire outer packaging material. Therefore, the tightening force by the outer packaging material 11 can be set to a relatively low pressure. This is advantageous in that a comfortable wearing feeling can be obtained and misalignment hardly occurs during wearing of the diaper.

Next, the adherend selective fastening portion 7 in the diaper 1 of the present embodiment will be further described. The adherend selective fastening portion 7 is a self-attaching fastened portion. The self-adhesive fixing part 7 is formed by fixing a self-adhesive fixing member 71 to the outer packaging material 11 of the diaper 1.
The self-adhesive fastening member 71 is formed by applying a self-adhesive to a fastening part base material. In the present specification, the self-adhesive property is a property of adhering only with the same kind of material and not substantially adhering to other materials. Specifically, the self-adhesive property is applied to the fastening substrate. It has adhesiveness only between adhesives. Therefore, the self-adhesive fastening part 7 does not substantially adhere to the constituent members of the diaper 1 other than the self-adhesive fastening part 7 such as the outer packaging material 11 and the surface sheet 2 or the skin of the wearer. The meaning of “substantially does not adhere” is the same as described above.

As shown in FIG. 1, the self-adhesive fastening member 71 has a rectangular shape, has elasticity in at least one direction, and is arranged such that the extending and contracting direction coincides with the diaper width direction. The self-adhesive fastening member 71 is formed in a dotted or linear joining pattern by a known joining method such as hot melt adhesive or heat fusion so as not to hinder the stretchability of the outer packaging material 11. And partially joined.
The self-adhesive fixing member 71 can further stabilize the self-adhesiveness by applying the self-adhesive agent thickly in the thickness direction by coating twice.

  Moreover, it is preferable that the self-adhesive fastening member 71 and the outer packaging material 11 have substantially the same elongation in the diaper width direction (details will be described later). If the elongations of both the members 71 and 11 are equal, when the diaper is worn, the both members 71 and 11 are integrally expanded and contracted, so that wrinkles are formed at the site where the self-adhesive fastening portion 7 is formed. It is prevented that the self-adhesive fastening part 7 is generated or detached from the outer packaging material 11. The self-adhesive fastening member 71 having the same degree of elongation as the outer packaging material 11 described above is a state in which the outer packaging material 11 hardly stretches in the diaper width direction and is not stretched as shown in FIG. The attaching member 71 is preferably joined to the outer packaging material 11.

  In the diaper 1 of the present embodiment, the pair of self-adhesive fastening portions 7, 7 are, as shown in FIGS. 1 and 2, at both ends in the diaper width direction of the outer packaging material 11 on the back side portion B of the diaper 1. It is provided on the diaper skin contact surface. More specifically, as shown in FIG. 2, the pair of self-adhesive fastening portions 7 and 7 are provided on the outer packaging material 11 that is folded back on the absorbent main body 10, and the waist elastic member 51. The diaper is provided at the inner side in the longitudinal direction of the diaper and at the inner side of the side seal portion S in the diaper width direction.

  Both ends of the diaper width direction are portions excluding the central part of the diaper width direction where the absorbent main body 10 is located. As will be described in detail later, it is preferable that the pair of self-adhesive fastening portions 7 and 7 are provided at both ends of the diaper width direction because the diaper 1 is rounded down. Since the pair of self-adhesive fastening portions 7 and 7 are arranged at both ends of the diaper width direction, the contraction force of the self-adhesive fastening portion 7 causes the elasticity of the outer packaging material 11 and the both ends of the diaper 1. The diaper 1 is rounded to a smaller size after being discarded by rolling it small while exerting elasticity.

  A self-adhesive agent is applied to the skin contact surface side of the self-adhesive fastening part 7, and the coefficient of friction between the surface of the self-adhesive fastening part 7 on the skin contact surface side and the skin of the wearer Is high. As described above, each of the pair of self-adhesive fastening portions 7 and 7 is disposed so as to abut on the waist of the diaper wearer, so that the diaper 1 is prevented from slipping during wearing.

In the present embodiment, in the crotch part C of the diaper 1, as shown in FIGS. 1 and 2, the non-skin contact surface side surface of the outer packaging material 11 is further provided with a rectangular self-adhesive fastening portion 7. Is provided. The self-adhesive fastening part 7 in the crotch C is fastened to each of the pair of self-adhesive fastening parts 7 and 7 in the back side part B as shown in FIG. It is.
The self-adhesive fastening part 7 in the crotch part C has the same configuration as the self-adhesive fastening parts at both ends of the diaper width direction described above, and is arranged so that the expanding and contracting direction coincides with the diaper width direction. Has been.

As for the dimension of a pair of self-adhesive fastening parts 7 and 7 in the back side part B mentioned above, it is preferable that the length of a diaper width direction is 10-100 mm, and the length of a diaper longitudinal direction is 20-100 mm.
Moreover, as for the dimension of the self-adhesive fastening part 7 in the crotch part C, it is preferable that the length of a diaper width direction is 20-100 mm, and the length of a diaper longitudinal direction is 10-100 mm. Thus, since the self-adhesive fastening part 7 has a large shape, it is easy to fasten each other when the diaper is discarded, and the operability when the diaper is discarded is excellent.

  Moreover, even if the surface on the non-skin contact surface side of the outer packaging material 11 is formed of a nonwoven fabric made of short fibers having excellent texture, as described above, the self-adhesive fastening member 71 has a large bonding area, Since it joins with this nonwoven fabric, the self-adhesive fastening member 71 does not come off from the outer packaging material 11 while wearing a diaper. Similarly, when the self-adhesive fixing members 71 are fixed to each other when the diaper is discarded, the self-adhesive fixing member 71 does not come off from the outer packaging material 11.

  The self-adhesive fastening member 71 preferably has an elongation at a load of 50 cN / 25 mm in a direction having stretchability of 20% or more, and particularly preferably 50% or more. Thus, since the self-adhesive fastening member 71 may be stretched even if it is pulled lightly, when the diaper is worn, it follows the wearer's movement well, and the fit of the diaper 1 becomes good.

  The elongation described above is measured by the following method. The self-adhesive fastening member 71 is cut out by 70 mm or more in the stretchable direction and 25 mm in a direction perpendicular to the direction to produce a measurement piece. The measurement piece is attached to the chuck of the tensile tester so that the direction having elasticity is the tensile direction. The distance between chucks is 50 mm. The measurement piece is pulled at 300 mm / min, the distance between chucks is subtracted from the length of elongation when the tensile load is 50 cN, the value is divided by the distance between chucks, and the value obtained by multiplying by 100 is defined as the elongation. In addition, when the dimension of a measurement piece is less than the magnitude | size mentioned above, you may measure suitably with the dimension.

  The self-adhesive fastening member 71 is formed by applying a self-adhesive agent to a fastening part base material having elasticity in at least one direction. As such a self-adhesive fastening member 71, for example, those described in the specification of JP-A-2005-95381 can be cited.

  The fastening part base material is preferably soft, excellent in texture, and does not damage the wearer's skin even when present on the diaper skin contact surface. Specifically, a woven fabric or a non-woven fabric is preferable, and the forming material is natural fibers such as cotton, silk, hemp, synthetic fibers such as polyester, polyamide, acrylic resin, polyurethane, polyethylene, and semi-synthetic fibers such as acetate fibers. Or regenerated fibers such as rayon fibers and cupra fibers, and a combination of these several fibers may be used.

  In order to impart stretchability to the fastening part base material, for example, there is a method of replacing a part of the fibers of the cotton woven fabric with an elastic thread such as a polyurethane fiber. If the elastic yarn is oriented and disposed on a cotton woven fabric, it is possible to impart stretchability in one direction. In addition, it is particularly preferable to use the outer layer nonwoven fabric 12 constituting the outer packaging material 11 as a fastening portion base material from the viewpoint of obtaining exactly the same elongation and excellent texture as the outer packaging material 11.

  As the self-adhesive agent, those which are safe to the wearer's skin and have a sufficient fastening force are preferable. Specifically, an acrylic polymer is preferable. The acrylic polymer is a homopolymer or copolymer of (meth) acrylic acid ester mainly composed of acrylic acid alkyl ester and / or methacrylic acid alkyl ester. Specific examples of (meth) acrylic acid alkyl esters include methyl acrylate, ethyl acrylate, isopropyl acrylate, n-butyl acrylate, t-butyl acrylate, isoamyl acrylate, 2-ethylhexyl acrylate, and n-acrylate. -Octyl, isooctyl acrylate, isononyl acrylate, decyl acrylate, dodecyl acrylate alkyl ester, methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, t-butyl methacrylate, methacryl Methacrylic acid alkyl esters such as isoamyl acid, 2-ethylhexyl methacrylate, n-octyl methacrylate, isooctyl methacrylate, isononyl methacrylate, decyl methacrylate, dodecyl methacrylate It can be mentioned. These alkyl (meth) acrylates can be used alone or in combination of two or more. Natural rubber-derived polymers and polyurethane polymers can also be used.

  The diaper 1 of the present embodiment will be further described. As shown in FIG. 2, the top sheet 2, the back sheet 3, and the absorbent core 4 are each rectangular and integrated to form a vertically long absorbent main body 10. is doing. The absorptive main body 10 is distributed from the ventral part A to the dorsal part B. As the surface sheet 2 and the back surface sheet 3, the same material as that conventionally used for this type of diaper can be used. Moreover, the absorptive core 4 is comprised from the particle | grains and fiber material of the superabsorbent polymer, and is coat | covered with the tissue paper (not shown).

  As shown in FIG. 2, side cuffs 8 and 8 made of a liquid-resistant or water-repellent and breathable material are formed on the left and right sides of the absorbent main body 10 in the longitudinal direction. Each side cuff 8 has a fixed end and a free end along the longitudinal direction of the absorbent main body 10. The fixed end is fixed to the top sheet 2. Furthermore, the fixed end and the free end are fixed to the topsheet 2 at both ends in the longitudinal direction of the absorbent main body 10 (ends in the vertical direction in FIG. 2). On the other hand, a side cuff elastic member 81 is arranged in an expanded state in the vicinity of the free end. As a result, when the diaper is worn, the elastic member 81 is contracted, whereby the side cuff 8 is erected and the outflow of the liquid in the width direction of the absorbent main body 10 is prevented.

  Leg part elastic members 61 a and 61 b are arranged on the left and right curved parts of the outer packaging material 11. Each leg part elastic member 61a, 61b is distribute | arranged along the said curved part. Each leg part elastic member 61a, 61b is distribute | arranged between the outer-layer nonwoven fabric 12 and the inner-layer nonwoven fabric 13, and is fixed to both the nonwoven fabrics 12 and 13 in the expansion | extension state by the predetermined joining means. One end of each leg part elastic member 61a, 61b overlaps in the crotch part C. On the other hand, the other end is terminated at the position of each side edge of the ventral side A and the back side B. When each leg part elastic member 61a, 61b joins the both-sides edge of the belly side part A of the diaper 1 and the both-sides edge of the back side part B, the edge parts of both elastic members 61a, 61b overlap. Or the ends of both elastic members 61a and 61b are continuously arranged up to both joint portions. As a result, as shown in FIG. 1, a substantially continuous ring-shaped leg gather is formed in the vicinity of the leg openings 6, 6 of the diaper 1.

Next, the details of the inner layer nonwoven fabric 13 and the outer layer nonwoven fabric 12 constituting the outer packaging material 11 will be described. The inner layer nonwoven fabric 13 has extensibility. As such a nonwoven fabric, for example, a spunbond nonwoven fabric that has been stretched at a predetermined ratio after its production, a nonwoven fabric that has been subjected to a blade groove stretching process, a low entangled spunlace, a pleated nonwoven fabric, and the like can be given. In particular, from the viewpoint of material strength, it is preferable to use a spunbonded nonwoven fabric that has been stretched at a predetermined magnification after its production from the viewpoint of elongation at low load. The inner layer nonwoven fabric preferably has a basis weight of 10 to 80 g / m ² , particularly 15 to 60 g / m ² .

  Further, as the outer layer nonwoven fabric 12, for example, a substantially inelastic non-elastic fiber layer is disposed on at least one surface of the elastic fiber layer, and both fiber layers are in a state in which the constituent fibers of the elastic fiber layer maintain the fiber form. In a state where all the fibers of the non-elastic fiber layer are joined by heat-sealing at the fiber intersection, and / or a part of the constituent fibers of the elastic fiber layer are inelastic fibers. Examples include stretchable nonwoven fabric that is in a state of entering a layer. And it is preferable that the outer-layer nonwoven fabric 12 is distribute | arranged to the outer packaging material 11 so that the nonwoven fabric which consists of a short fiber as an inelastic fiber layer may be located in the non-skin contact surface side of the diaper 1. FIG.

Next, the stretchable nonwoven fabric will be described in detail below.
At the interface between the elastic fiber layer and the non-elastic fiber layer and in the vicinity thereof, the intersection of the constituent fiber of the elastic fiber layer and the constituent fiber of the non-elastic fiber layer is heat-sealed, and is substantially uniform over the entire surface. It is joined to. By joining all over, it is prevented that both layers are separated and a space is formed, and a stretchable nonwoven fabric having a multi-layer structure with a sense of unity, such as a single nonwoven fabric. "The state in which the constituent fibers of the elastic fiber layer maintain the fiber form" means that even if most of the constituent fibers of the elastic fiber layer are given heat, pressure, etc., a film or film-fiber structure The state which is not deformed. Further, in the elastic fiber layer, the intersection of the constituent fibers is thermally fused in the layer. Similarly, in the non-elastic fiber layer, the intersection of the constituent fibers is thermally fused in the layer.

  When non-elastic fiber layers are arranged on both sides of the elastic fiber layer, at least one of the constituent fibers is in a state in which a part of the constituent fibers enters the elastic fiber layer and / or the constituent fibers of the elastic fiber layer A part has entered into at least one of the inelastic fiber layers. In order to allow the constituent fibers of the non-elastic fiber layer to enter the elastic fiber layer and / or to allow the constituent fibers of the elastic fiber layer to enter the non-elastic fiber layer, the constituent fibers of the non-elastic fiber layer and the non-elastic fiber layer It is preferable that at least one of the non-elastic fiber and the elastic fiber is in a web state (a state where the fiber is not heat-sealed) before the process of thermally fusing the constituent fibers. From the viewpoint of allowing the constituent fibers to enter other layers, the fiber layer in the web state is preferable because the short fibers have a higher degree of freedom than the long fibers. Moreover, it is preferable to use the air-through method in order to allow the constituent fibers of the non-elastic fiber layer to enter the elastic fiber layer and / or to allow the constituent fibers of the elastic fiber layer to enter the non-elastic fiber layer. By using the air-through method, the constituent fibers can be made to enter the opposing fiber layer, and the constituent fibers can be easily made to enter from the opposing fiber layer. In addition, by using the air-through method, it becomes easy to allow the constituent fibers of the inelastic fiber layer to enter the elastic fiber layer while maintaining the bulkiness of the inelastic fiber layer. In particular, when the constituent fibers of the inelastic fiber layer are entangled with the constituent fibers of the elastic fiber layer, it is preferable that they are entangled only by the air-through method. In order to entangle the fibers by the air-through method, the gas blowing pressure, the blowing speed, the basis weight and thickness of the fiber layer, the conveyance speed of the fiber layer, etc. may be adjusted appropriately. It is preferable to carry out the method. In the hot air treatment (particularly, the air-through method), a part of the constituent fibers of the non-elastic fiber web enters the elastic fiber web, and at the same time, the constituent fibers of the non-elastic fiber web and / or the constituent fibers of the non-elastic fiber web; The constituent fibers of the elastic fiber web are heat-sealed at their intersections. In this case, care should be taken so that the constituent fibers of the elastic fiber web do not become a film or a film-fiber structure by hot air treatment.

  The elastic fiber layer has the property of being stretchable and contracting when released from the stretched force. The elastic fiber layer preferably has a residual strain of 20% or less, particularly 10% or less when contracted after 100% elongation in at least one direction parallel to the surface. This value is preferably satisfied in at least one of the MD direction and the CD direction, and more preferably satisfied in both directions.

  The elastic fiber layer is an aggregate of fibers having elasticity. The elastic fiber forming method includes, for example, a melt blown method in which a molten resin is extruded from a nozzle hole, and the extruded molten resin is elongated by hot air to thin the fiber, and a semi-molten resin is cooled by cold air. There is a spunbond method in which stretching is performed by a mechanical draw ratio. As a special method of the melt blown method, there is a spinning blow method in which the spun bond method is combined with the melt blown method. The elastic fiber layer may be in the form of a web or a nonwoven fabric made of elastic fibers. For example, it may be a web or a non-woven fabric formed by a spinning blow method, a spun bond method, a melt blow method, or the like. Particularly preferred is a web obtained by the spinning blow method. As the constituent fiber of the elastic fiber layer, for example, a fiber made of thermoplastic elastomer, rubber or the like can be used. In particular, fibers made from thermoplastic elastomers can be melt-spun using an extruder in the same way as ordinary thermoplastic resins, and the fibers thus obtained are easily heat-sealed. Is suitable for the stretchable nonwoven fabric of this embodiment. Examples of the thermoplastic elastomer include styrene elastomers such as SBS, SIS, SEBS, and SEPS, olefin elastomers, polyester elastomers, and polyurethane elastomers. These can be used individually by 1 type or in combination of 2 or more types.

  The inelastic fiber layer has extensibility but is substantially inelastic. The stretchability here refers to the case where the constituent fibers themselves are stretched, and even if the constituent fibers themselves are not stretched, the two fibers that have been heat-sealed at the intersection of the fibers are separated from each other, or the fibers are thermally fused. The three-dimensional structure formed by a plurality of fibers may be structurally changed due to wearing or the like, and the constituent fibers may be broken, and the whole fiber layer may be elongated. Examples of the fibers constituting the inelastic fiber layer include fibers made of polyethylene (PE), polypropylene (PP), polyester (PET or PBT), polyamide, and the like. The fibers constituting the inelastic fiber layer may be short fibers or long fibers, and may be hydrophilic or water repellent. Further, core-sheath type or side-by-side composite fibers, split fibers, irregularly shaped cross-section fibers, crimped fibers, heat-shrinkable fibers, and the like can also be used. These fibers can be used singly or in combination of two or more. The inelastic fiber layer can be a continuous filament or short fiber web or nonwoven.

  Moreover, as the surface sheet 2, the back surface sheet 3, the absorbent core 4, and the elastic members 61 and 71 forming the diaper 1 of the present embodiment, various materials used in conventional absorbent articles are used without particular limitation. be able to.

Next, an example of a method for discarding the diaper 1 of the present embodiment described above after use will be described below with reference to FIGS.
First, in a diaper wearing state, each of the pair of side seal portions S, S is torn in the longitudinal direction of the diaper, and the diaper 1 is removed from the wearer. When there is a solid material such as stool inside the diaper 1, it is preferable to perform the following operation after the solid material is discarded in a toilet or the like.
Next, the diaper 1 starts to be rolled from the longitudinal end edge of the ventral side portion A toward the inside of the diaper longitudinal direction, and as shown in FIG. The portion 7 is rounded up to the longitudinal edge at the back side B so that the portion 7 is located on the upper side.
Next, as shown in FIG.3 (b), each width direction both ends of the back part B are pulled out toward each outward of the diaper right and left.
Thereafter, both ends in the width direction of the back side B are extended toward the inside of the diaper so as to cover the left and right sides of the rolled diaper, and a pair of self-adhesive fastening portions in the back side B As shown in FIG. 3 (c), each of 7 and 7 is fixed to the self-adhesive fixing portion 7 in the crotch part C, and then the rolled diaper 1 is discarded in a filth box or the like. At this time, the stretchable outer packaging material 11 to which the self-adhesive fastening portion 7 is fixed exhibits stretchability, so that the entire diaper is rounded down and is not bulky in the filth box.
Since the diaper 1 of this embodiment has the three self-adhesive fastening parts 7, 7, as described above, the diaper 1 can be easily rounded and fastened and discarded.

According to the diaper 1 of the present embodiment described above, the three self-fixing fastening portions 7, 7, 7 used at the time of disposal are not limited by the material of the diaper outer packaging material 11. A non-woven fabric made of short fibers having excellent texture can be arranged on the surface. On the other hand, for example, when the tape fastener described in Patent Document 1 is used as a fastening portion of the diaper 1 of the present embodiment, the outer packaging material 11 is obtained when the other end is pulled to extend the length of the tape fastener. There is a possibility that one end fixed to the elastic layer peels off between the nonwoven fabric made of short fibers which are non-elastic fiber layers and the elastic fiber layer, and the outer packaging material 11 is broken. Moreover, in the diaper described in Patent Document 1, a fastening portion having an adhesive layer is provided at the other end of the tape fastener, and the other end of the tape is stretched by pulling the other end while the infant is wearing the diaper. However, in the diaper 1 of this embodiment, such a situation does not occur, although the fastening portion may adhere to the skin of the infant.
Moreover, the self-adhesive fastening part 7 is simple as a fastening part at the time of disposal of a diaper, is easy to manufacture, and is inexpensive.

  Next, the diaper 1 of 2nd and 3rd embodiment is demonstrated, referring FIG.4 and FIG.5. Regarding the second and third embodiments that are not particularly described, the description in detail regarding the first embodiment is applied as appropriate. Moreover, in FIG.4 and FIG.5, the same code | symbol is attached | subjected to the same member as FIGS. 1-3.

In the diaper 1 of the second preferred embodiment of the present embodiment, the pair of self-adhesive fastening portions 7 ′ and 7 are formed of the outer packaging material 11 on the back side portion B of the diaper 1 as shown in FIG. It is provided at both ends of the diaper width direction, one self-adhesive fastening part 7 'is provided on the diaper skin contact surface, and the other self-adhesive fastening part 7 is a diaper non-skin contact. It is provided on the surface. Moreover, in this embodiment, the self-adhesive fastening member is not provided in the crotch part C of the diaper 1.
About another structure, it is the same as that of 1st Embodiment.

Next, an example of a method for discarding the diaper 1 of the present embodiment described above after use will be described below with reference to FIG.
First, in a diaper wearing state, each of the pair of side seal portions S, S is torn in the longitudinal direction of the diaper, and the diaper 1 is removed from the wearer.
Next, the diaper 1 starts to be rolled from the longitudinal end edge of the ventral side portion A toward the inside of the diaper longitudinal direction, and the self-adhesive fastening portion 7 in the crotch portion C is positioned on the upper side. Round to the longitudinal edge of the dorsal side B.
Next, each of the width direction both ends of the back side part B is pulled out toward each of the left and right outer sides of the diaper.
Then, the width direction both ends of the back side part B are extended toward the inside of the diaper so as to cover both the left and right sides of the rolled diaper, and the self-adhesive fastening part 7 is in contact with the diaper non-skin. The end of the back side portion B provided on the surface side is folded so that the self-adhesive fastening portion 7 faces upward, and on the back side, as shown in FIG. After fixing the self-adhesive fixing part 7 provided on the diaper skin contact surface in the part B, the rolled diaper 1 is discarded in a waste container or the like.

  According to the diaper 1 of the present embodiment, the same effects as those of the above-described embodiment are exhibited.

  In the diaper 1 of the third preferred embodiment of the present embodiment, the pair of self-adhesive fastening portions 7, 7 is a diaper of the outer packaging material 11 on the back side B of the diaper 1, as shown in FIG. It is provided in the diaper skin contact surface in the both ends of the width direction. In this embodiment, the crotch part C of the diaper 1 is not provided with the self-adhesive fastening member.

Next, an example of a method for discarding the diaper 1 of the present embodiment described above after use will be described below with reference to FIG.
First, in a diaper wearing state, each of the pair of side seal portions S, S is torn in the longitudinal direction of the diaper, and the diaper 1 is removed from the wearer.
Next, the diaper 1 starts to be rolled from the longitudinal end edge of the ventral side portion A toward the inside of the diaper longitudinal direction, and the self-adhesive fastening portion 7 in the crotch portion C is positioned on the upper side. Round to the longitudinal edge of the dorsal side B.
Next, each of the width direction both ends of the back side part B is pulled out toward each of the left and right outer sides of the diaper.
Then, the widthwise both ends of the back side B are extended toward the inside of the diaper so as to cover the left and right sides of the rolled diaper, and as shown in FIG. After the pair of self-adhesive fastening portions 7, 7 provided on the diaper skin contact surface in B are fastened, the rolled diaper 1 is discarded in a filth box or the like.

  According to the diaper 1 of the present embodiment, the same effects as those of the above-described embodiment are exhibited.

The pants-type disposable diaper of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.
For example, the self-adhesive fastening portion 7 may be formed by directly applying a self-adhesive agent to the outer packaging material 11 of the diaper 1. In this case, it is preferable that the self-adhesive is applied in a discontinuous pattern such as a dot shape or a spiral shape so as not to disturb the stretchability of the diaper 1.

  Moreover, in each embodiment, although a pair of self-adhesive fastening part 7 and 7 was provided in the back part B, you may provide in the ventral part A. In particular, as in the first and third embodiments, when a pair of self-adhesive fastening portions 7 are provided on the diaper skin contact surface, the elasticity of the outer packaging material 11 in the diaper width direction is self-adhesive. Since the elasticity of the diaper width direction which the adhesive tape 8 has is added and the elasticity of the waist part of the diaper 1 is improved, it is preferable. Moreover, a pair of self-adhesive tapes 7 and 7 may be provided in the diaper non-skin contact surface of the diaper width direction both ends in the abdominal side part A or the back side part B.

  Furthermore, in each embodiment, although a pair of self-adhesive fastening parts 7 and 7 were provided in the outer-layer nonwoven fabric 12 folded back to the absorbent main body 10 side, a pair of self-adhesive fastening parts 7 and 7 7 may be provided on the inner layer nonwoven fabric 13. Moreover, in each embodiment, the self-adhesive fastening member 71 is joined to the stretched outer packaging material 11 as shown in FIG. 2 in the stretched state in the diaper width direction as much as the outer packaging material 11. It is also preferable.

  Further, in each embodiment, the outer packaging material 11 extends outward from the front and rear end edges of the absorbent main body 10 and is folded back on the front and rear end portions of the absorbent main body 10. The front and rear end portions of the absorbent main body 10 do not extend outward from the front and rear end edges of the main body 10 and are covered with a sheet material of another member that is extensible in at least the diaper width direction. The wearing stop part 7 may be provided. Moreover, in each embodiment, the waist part elastic member 51 was distribute | arranged to the vicinity of the waist opening part 5 of the diaper 1, and the substantially continuous ring-shaped waist gathers were formed. A member having at least stretchability may be disposed in the vicinity of the waist opening 5 in the abdominal side A or / and the back side B. Further, in each embodiment, the leg elastic members 61a and 61b are arranged in the vicinity of the leg opening 6 to form a substantially continuous ring-shaped leg gather, but as described above. The vertically long member having at least extensibility may be disposed on at least a part of the periphery of the leg opening 6. Further, the leg elastic members 61a and 61b may not be disposed near the leg opening 6.

The pants-type disposable diaper of the present invention may be a pants-type disposable diaper for infants, but may be a pants-type disposable diaper for adults.
The description omission part in one embodiment mentioned above and the part which only one embodiment has can mutually be utilized suitably.

FIG. 1 is a perspective view showing a pants-type disposable diaper as a first embodiment of the present invention. FIG. 2 is a plan view showing a state in which the diaper of FIG. 3 (a) and 3 (b) are schematic perspective views showing how the diaper of FIG. 1 is fixed when discarded, (a) shows a state in which the diaper is rolled up, and (b) shows The state which fastened the diaper with the self-adhesive fastening part is shown. 4 (a) and 4 (b) are schematic perspective views showing a state in which the pants-type disposable diaper as the second embodiment of the present invention is disposed, and (a) is a state in which the diaper is rolled up. (B) has shown the state which fastened the diaper in the self-adhesive fastening part. Fig.5 (a) and (b) are schematic perspective views which show a mode that it fastens when discarding the underpants type disposable diaper as 3rd Embodiment of this invention, (a) is the state which rolled the diaper (B) has shown the state which fastened the diaper in the self-adhesive fastening part.

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 2 Top sheet 3 Back sheet 4 Absorption core 5 Waist opening 51 Waist part elastic member 6 Leg opening part 61a, 61b Leg part elastic member 7 Self-adhesive fastening part (adhering body selective fastening part) )
71 Self-adhesive fastening member 8 Side cuff 81
DESCRIPTION OF SYMBOLS 10 Absorbent main body 11 Outer packaging material 12 Outer layer nonwoven fabric 13 Inner layer nonwoven fabric A Abdominal side B Back side C Crotch

Claims (7)

It has a plurality of adherend-selective fastening parts that do not substantially join the nonwoven fabric and the skin of the wearer,
A pants-type disposable diaper adapted to fasten and discard the adherend selective fastening parts.   The pants-type disposable diaper according to claim 1, wherein the adherend selective fastening portion is a self-attaching fastening portion.   The adherend selective fastening portion is formed by fixing an adherend selective fastening member to the diaper, and the adherend selective fastening member has elasticity in at least one direction. The pants-type disposable diaper according to claim 1, wherein the extending and contracting direction is made to coincide with the diaper width direction.   A vertically long absorbent main body including an absorbent core; and an outer packaging material positioned on the non-skin contact surface side of the absorbent main body and having elasticity, and the adherend-selective fastening portion is the outer packaging material The underpants type disposable diaper in any one of Claims 1-3 provided in.   5. The pants-type disposable diaper according to claim 4, wherein the pair of adherend-selective fastening portions are provided at both ends of the outer packaging material in the diaper width direction on the belly side portion or the back side portion of the diaper.   The outer wrapping material extends outward from the front and rear end edges of the absorbent main body, the extended portions are folded back to the absorbent main body side, and the pair of adherend selective fastening portions are diapers. The pants-type disposable diaper according to claim 5, which is provided on the skin contact surface. The pants-type disposable diaper according to claim 6, wherein the adherend selective fastening portion is further provided on a surface of the outer packaging material on the non-skin contact surface side in the crotch portion of the diaper.

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