JP5208694B2 - Tape type disposable diaper - Google Patents

Description

The present invention relates to a tape type disposable diaper, more particularly, while maintaining flexibility, during the time or worn worn, method of manufacturing the fastening tape which can manufacture a hardly fastening tape torn It is related with the tape-type disposable diaper provided with the fastening tape manufactured by this .

  Generally, a tape-type disposable diaper is composed of a front body, a crotch part, and a back body, and is arranged so as to cover the surface of the absorber and the absorber, and at least a part is a top sheet made of a liquid-permeable material. And a back sheet made of a liquid-impermeable material and arranged to extend from the left and right side edges of the back body, fixing the front and back bodies (For example, refer to Patent Documents 1 and 2).

  Such a tape-type disposable diaper is inserted into the wearer's inseam during replacement, and after expanding the back body, the front body is applied according to the body shape of the wearer. Thereafter, the fastening tape is worn by engaging the tape engaging position.

  When the tape-type disposable diaper is worn on the wearer, the excrement of the wearer is absorbed by the absorbent through the liquid-permeable portion of the top sheet, and the back sheet prevents leakage to the outside. Is done.

  In such a tape-type disposable diaper, the fastening tape causes both ends in the short direction of the band-shaped hook material sheet, which is a material of the hook material, to be pressure-bonded to the band-shaped long substrate sheet, which is the material of the base material. After joining the hook material sheet and the long base sheet to obtain a long laminated body, the long laminated body is cut in the longitudinal direction and divided into two parts, and cut in a plurality of places along the short side direction. It is known to manufacture (for example, refer patent document 3).

Japanese Patent Laying-Open No. 2005-21136 JP 2007-282893 A JP 2000-93211 A

  However, the tape-type disposable diaper provided with the fastening tape manufactured by the method described in Patent Document 3 is fastened when the diaper is worn and the fastening tape is pulled while the weight of the wearer is applied. Since a large force is applied to the tape, the fastening tape may be torn off. Moreover, not only when wearing, but also when wearing (at the time of wearing), when a big force was applied to the fastening tape, the fastening tape might be torn off. In particular, fastening tapes using non-woven fabric base materials are preferred because they are good in touch and are often used. However, when such base materials are used, the fastening tape tends to break. There is.

  More specifically, when changing diapers of infants, it can be performed as follows. First of all, infants are lighter than adults, so lift the buttocks and make a gap under the buttocks. Next, the back body of the tape-type disposable diaper is slid into the gap in an expanded state. Next, the buttocks are placed on the diaper that has been slid in, and then the fastening tape disposed on both sides of the back body is picked and the diaper is fitted around the abdomen and legs of the wearer while pulling outward. Next, the fastening tape that has been picked is fixed to the front body. For infants, change diapers in this way.

  On the other hand, when changing an adult diaper, it can be performed as follows. Since adults are heavier than infants, it is difficult to lift their bodies (buttocks). Therefore, the wearer is first placed in the lateral position. Next, of the back body of the diaper, the lower part of the body is folded, and the back body is slid under the body in that state. Next, after changing the posture on the back, the folded part is expanded and the diaper is spread under the buttocks. Next, the fastening tape arranged on both sides of the back body is grasped and the diaper is fitted around the wearer's belly and legs while pulling outward. At this time, a gap is not formed between the diaper and the wearer. Next, the fastening tape that has been gripped is fixed to the front body. Adults often change diapers in this way.

  As described above, in both cases of infants and adults, the fastening tape may be pulled when the back body is unfolded or when the diaper is fitted to the wearer's body shape. At this time, since the weight of the wearer is applied to the diaper, a large force is often applied to the pulling fastening tape.

  In addition, when the wearer is an adult, the disposable diaper is often used with the urine pad on the inside. When the urine pad becomes dirty due to excrement, only the dirty urine pad is replaced. Often done. Therefore, the tape-type disposable diaper may be used for 2 to 3 days unless it becomes dirty. In such a case, the fastening tape is pulled more frequently than the case where the diaper is replaced every time it is excreted, and is easily damaged. Therefore, not only when changing a diaper, but also a malfunction may occur during wearing (for example, the fastening tape is torn off).

  Therefore, in order to prevent problems (for example, tearing) of a fastening tape using a base material made of nonwoven fabric, it is conceivable to improve the strength of the base material. Specifically, malfunction (for example, torn off) by increasing the temperature at the time of hot embossing of the substrate, increasing the pressure at the time of embossing, or increasing the area ratio of embossing. Can be prevented. However, if the strength of the base material is excessively improved, the base material becomes hard, and there is a problem that sufficient flexibility cannot be obtained (that is, a good hand cannot be obtained).

The present invention has been made in view of such problems of the prior art, and is capable of producing a fastening tape easily and at low cost, or excellent in freedom of design of the fastening tape. in addition to a method, while maintaining the flexibility, during the time or wear to wear, to provide a tape type disposable diaper using the thus obtained fastening tape in the manufacture how the hard fastening tape torn Is.

According to the present invention, shown to tape type disposable diaper is provided below.

[1] It is composed of the front body, the crotch part, and the back body, and is arranged so as to cover the surface of the absorber, and at least a part of the top sheet made of a liquid-permeable material, A back sheet made of a liquid-impermeable material, and a fastening tape capable of fixing the front body and the back body, the fastening tape being disposed so as to cover the back surface of the absorber, A part of one surface of the belt-like long base sheet, a placing step of placing a belt-like long hook material along its longitudinal direction to obtain a laminate, and after obtaining the laminate, By pressing both ends of the long hook material in the short direction from the surface side of the long hook material toward the long base sheet side to form a concave portion for joining, the long hook material and the Area where the long hook material is placed at the same time as joining the long base sheet A reinforcement joining step of forming a reinforcing body by pressing a region other than the above to obtain a joined body, and a cutting step of cutting the joined body into a predetermined size to obtain a plurality of fastening tapes. The fastening tape is manufactured by a manufacturing method of a wearing tape , and the fastening tape is disposed so as to extend from the left and right side edges of the back body, and a part of the reinforcing recess is part of the back body. Tape-type disposable diaper fixed to

[ 2 ] The above-described placing step is positioned at an intermediate portion between the first end region including one end portion in the short direction of the long base sheet and the second end region including the other end portion. The long hook material is placed on one surface of the intermediate region to obtain the laminate, and the reinforcing joining step forms the joining concave portion and at the same time the first end region. The tape according to [1], wherein the reinforcing recess is formed in each of the first end region and the second end region by pressing the second end region. Type disposable diaper .

[ 3 ] The placing step described above is a step of placing one piece of the long hook material on the intermediate region of the long base sheet, and the cutting step includes placing the joined body on the first side. Cut along an S-curve-shaped cutting locus that sequentially passes through the end region, the intermediate region, the second end region, the intermediate region, and the first end region, and one side is an S-curve Two fastening tape intermediates having a side edge on the other side and a linear side edge on the other side are obtained, and each of the obtained fastening tape intermediates is attached to the S-curved side edge. The tape-type disposable diaper according to the above [ 2] , which is a step of obtaining a plurality of the fastening tapes by cutting between a valley portion and the linear side edge.

[ 4 ] The placing step is a step of placing the two long hook members on the intermediate region of the long base sheet with a space therebetween, and the cutting step is the long hook member. The tape-type disposable diaper according to the above [ 2] , which is a step of cutting a portion between the two along the longitudinal direction of the joined body.

[ 5 ] The tape-type disposable diaper according to [ 4 ], wherein a trajectory for cutting a portion between the long hook members is linear or S-curved.

The manufacturing method for manufacturing the fastening tape used for the tape-type disposable diaper of the present invention ( the manufacturing method of the fastening tape of the first embodiment ) can manufacture the fastening tape easily and at low cost. In addition, the produced fastening tape has an effect that it is difficult to break when worn or during wearing while maintaining flexibility.

  The manufacturing method of the fastening tape according to the second embodiment and the manufacturing method of the fastening tape according to the third embodiment are methods that are excellent in freedom of design of the fastening tape, in addition to the manufactured fastening tape. The wearing tape has an effect that it is difficult to break when worn or worn while maintaining flexibility.

  The tape-type disposable diaper of the present invention has an effect that the fastening tape is difficult to tear when being worn or being worn while maintaining flexibility.

  Hereinafter, the best mode for carrying out the present invention will be described, but the present invention is not limited to the following embodiment. That is, it is understood that modifications and improvements as appropriate to the following embodiments are also within the scope of the present invention based on ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. Should be.

  The fastening tape obtained by the method for producing the fastening tape of the first embodiment to the third embodiment is suitable as a fastening tape for a tape-type disposable diaper regardless of whether it is for infants or adults (adults). Although it can be used, it is preferable to use it for a tape-type disposable diaper for adults. This is because a tape-type disposable diaper for adults has a tendency that a wearer tends to firmly fix the diaper, and a large force is often applied to the fastening tape when the diaper is worn or worn.

[1] Manufacturing method of fastening tape (first embodiment):
One embodiment of the method for producing a fastening tape of the present invention is a laminate in which a belt-like long hook material is placed along a longitudinal direction on a part of one surface of a belt-like long base sheet. And a concave portion for joining by pressing both end portions of the long hook material in the short direction from the surface side of the long hook material toward the long base sheet side after obtaining the laminated body. By pressing the region other than the region on which the long hook material is placed (that is, the region including the end portion that can be fixed to the diaper) A reinforcing joining step for forming a reinforcing concave portion to obtain a joined body, and a cutting step for obtaining a plurality of fastening tapes by cutting the joined body into a predetermined size are provided.

  By providing such a process, in addition to being able to manufacture a fastening tape easily and at low cost, the produced fastening tape is difficult to break when worn or while wearing while maintaining flexibility. There is an effect.

  FIG. 1 is a schematic view showing a fastening tape manufacturing apparatus 200 that can be used in an embodiment of the manufacturing method of the fastening tape of the present invention, and FIG. 2 is a fastening tape manufacturing apparatus 200 shown in FIG. It is a perspective view which expands and shows a part of. Moreover, FIG. 3 has shown the elongate base material sheet 11 and the elongate hook material 13 of the part shown to X of FIG. Moreover, in FIGS. 1-23, the same code | symbol is attached | subjected to the common component.

  The fastening tape manufacturing apparatus 200 includes a first long winding roll 51 that can continuously supply the long base sheet 11 and a second long winding that can continuously supply the long hook material 13. The long hook material 13 is placed along the longitudinal direction of the long base sheet 11 on one surface of the long base sheet 11 supplied from the take-up roll 52 and the first long take-up roll 51. The support roll 53 for forming the laminate 15, the reinforcing base roll 11 for joining the long base sheet 11 and the long hook material 13 of the laminate 15 to form the joined body 16, and the joined body 16. A first cutting portion 56 for cutting the intermediate portion in the short direction into an S-shaped curve along the longitudinal direction thereof, and dividing the joined body 16 into two to form the fastening tape intermediate 17, and the fastening tape The intermediate body 17 is formed between the valley portion of the side edge formed in the S-curve shape and the side edge formed in the straight shape. Ri and release includes a second cutting portion 57 to form a fastening tape 10a, the.

  Further, the fastening tape manufacturing apparatus 200 includes an adhesive application portion 59 that applies an adhesive to the back surface of the long hook member 13, a folding portion 61 that folds the S-shaped end portion inward, and a long portion of the folded portion. A temporary fixing roll 62 for temporarily fixing to the surface of the scale substrate sheet 11.

  As shown in FIG. 2, the reinforcing bonding roll 54 includes a coupling convex portion 54a1 for forming a coupling concave portion, a reinforcing convex portion 54a2 for forming a reinforcing concave portion, and a cylindrical roll body 54a3. And a first plain roll 54b having a flat contact surface with the long base sheet 11 that forms a pair with the first pattern roll 54a. The coupling convex portion 54a1 of the first pattern roll 54a is a ring-shaped member disposed on the outer periphery of the cylindrical roll body 54a3, and the reinforcing convex portion 54a2 is on the outer periphery of the cylindrical roll body 54a3. The long side direction is a plurality of substantially rectangular parallelepiped shapes inclined so as to have a predetermined angle with respect to the axial direction of the roll body 54a3.

  The temporary fixing roll 62 includes a temporary fixing convex roll 62a provided with a plurality of convex portions for pressing a part of the portion folded back by the folding portion 61 to the surface side of the long base sheet 11, and the temporary fixing roll 62a. A temporary concave concave roll 62b provided with a concave portion that fits into the convex portion of the convex convex roll 62a.

[1-1] Placement process:
In the method for producing a fastening tape of the present invention, first, a belt-like long hook material is placed along a longitudinal direction on a part of one surface of a belt-like long base sheet to obtain a laminate. A placement process is performed. For example, FIG. 4 shows an example in which a strip-shaped long hook material 113 is placed on the other end 111b side of the strip-shaped long base sheet 111 along the longitudinal direction of the long base sheet 111. Yes.

  This step includes one of the first end region including one end portion in the short direction of the long base sheet and the intermediate region located in the intermediate portion of the second end region including the other end portion. It is preferable that the long hook material is placed on the surface. For example, in FIG. 3, one strip-shaped long hook material 13 is placed along one side of the central region 74 of the strip-shaped long base sheet 11 along the longitudinal direction of the long base sheet 11. The laminated body 15 obtained in this way is shown.

  In this step, two long hook members may be placed on one surface of the intermediate region of the long base sheet with a space therebetween. For example, FIG. 9 shows an example in which two long hook members 13 and 13 are placed on one surface of the intermediate region of the long base sheet 11 with a space therebetween.

[1-1-1] Long base sheet:
The long base material sheet used in this step becomes a base material of the fastening tape by being cut into a predetermined shape, for example, a strip-like material made of a nonwoven fabric, a laminate sheet obtained by joining a nonwoven fabric and a film, or the like. A sheet can be used.

  Specifically, various nonwoven fabrics such as spunbond, SMS (spunbond / meltblown / spunbond), SMMS (spunbond / meltblown / meltblown / spunbond), card embossing, and resin bond can be used as the nonwoven fabric. .

  Examples of the constituent material of the nonwoven fabric include synthetic fibers made of polyolefin (polyethylene, polypropylene, etc.), polyester, aliphatic polyamide (nylon (registered trademark)), and other thermoplastic resins. In this case, the synthetic fiber may be a single fiber or a composite fiber having a core-sheath structure or the like.

[1-1-2] Long hook material:
The long hook material used in this step becomes a hook material for the fastening tape by being cut into a predetermined shape. This hook material is a convex member of a mechanical fastener (also referred to as a planar fastener), and can be fixed by mechanical coupling with a loop material that is a concave material. And this hook material is attached to the surface of a base material. As the hook material, for example, a material having a large number of protrusions (such as hooks, mushrooms, hooks, etc.) formed on the surface is used.

  As the loop material, a material in which loop-like fibers are arranged on the surface is often used. By superimposing a hook material on the surface of the loop material and engaging a large number of protrusions of the hook material with the surface of the loop material, both members can be detachably coupled.

[1-2] Reinforcement joining process:
Next, in the manufacturing method of the fastening tape of the present invention, after obtaining the laminated body, both ends in the short direction of the long hook material are directed from the surface side of the long hook material to the long base sheet side. Reinforcing recess by pressing a region (pressing region) other than the region where the long hook material is placed at the same time as forming a recess for bonding by pressing and joining the long hook material and the long base sheet. A reinforcing joining process is performed to obtain a joined body. According to the reinforcement joining process of this embodiment, since the concave part for joining and the concave part for reinforcement can be formed with one roller, there exists an advantage that a fastening tape can be manufactured easily and at low cost.

  FIG. 4 shows a case where bonding recesses 71 a are formed at both ends in the longitudinal direction of the long hook material 113 to join the long hook material 113 and the long base sheet 111 at the same time as one of the long base sheets 111. A joined body 116 is shown in which a pressing region 175 including an end 111a is pressed to form a reinforcing recess 72a. In addition, the length of the short base direction of the long base material sheet 111 is about half of the length of the long base material sheet 11 shown in FIG. Therefore, a plurality of fastening tapes can be obtained by cutting the joined body 116 at predetermined intervals in the lateral direction without cutting along the longitudinal direction. Thus, you may use the elongate base material sheet of the width | variety comparable as a fastening tape in advance. In the obtained fastening tape, the pressing area 175 is fixed as a fixing area on the back body of the diaper. 4 is formed only in the pressing region 175, it may be formed in the free end region 176 including the other end 111b in addition to the pressing region 175.

  In this step, the first end region and the second end region are respectively pressed by pressing the first end region and the second end region at the same time as forming the bonding recess. It is preferable to form a reinforcing recess. According to such a process, a fastening tape can be manufactured without generating trim.

  For example, FIG. 1 and FIG. 3 are for joining by pressing from the surface side of the long hook material 13 toward the long base material sheet 11 so as to straddle the long hook material 13 and the long base material sheet 11. At the same time as forming the recess 71a to join the long hook material 13 and the long base sheet 11, the first end region 75 and the second end region 76 are pressed to form the reinforcing recess 72a. An example is shown.

[1-2-1] Recess for bonding:
The bonding recess is a recess formed by pressing both ends of the long hook material in the short direction from the surface side of the long hook material toward the long base sheet. The shape of the concave portion for joining is not particularly limited as long as the long hook material and the long base sheet are joined. For example, a circular shape, an elliptical shape, a triangular shape, a quadrangular shape, a polygonal shape, a long or short belt shape, and a straight shape. And a geometric pattern such as a letter such as a T-shape or an L-shape, a lattice shape, a mesh shape, a curved shape of a continuous or discontinuous waveform, and the like.

  For example, FIG. 2 and FIG. 3 show an example in which a long belt-like bonding recess 71a is formed. FIG. 15 shows an example in which a short belt-like bonding recess 71b is formed.

  It should be noted that the bonding recesses only need to be formed at both ends in the short direction of the long hook material, and may be formed only at both ends in the short direction of the long hook material. 3 may be formed so as to straddle the long hook material 13 and the long base sheet 11.

  As long as the long hook material and the long base sheet are joined, the pressing condition is not particularly limited, and a conventionally known method can be employed. Specifically, methods such as embossing, heat sealing, and ultrasonic sealing can be used. In addition to pressing, the bonding recess can be formed by heat treatment.

[1-2-2] Reinforcing recess:
The reinforcing concave portion is a concave portion formed by pressing, and the shape thereof is, for example, a circle, an ellipse, a triangle, a quadrangle, a polygon, a long or short strip, a straight shape, a T shape, and a substantially T shape. Shape, L-shape, substantially L-shape, I-shape, substantially I-shape, and other geometrical patterns such as lattice shapes, continuous or discontinuous waveform curves, and the like.

  For example, the fastening tape 10a shown in FIG. 13 is an example in which a short belt-like reinforcing recess 72a is formed. The fastening tape 10b shown in FIG. 15 is an example in which a long belt-like reinforcing recess 72b is formed. The fastening tape 10c shown in FIG. 16 is an example in which a circular reinforcing recess 72c is formed. Moreover, the fastening tape 10d shown in FIG. 17 is an example in which a rectangular reinforcing recess 72d is formed.

  By forming such a reinforcing recess, the tensile strength of the portion where the reinforcing recess is formed can be improved. Therefore, it is possible to obtain a fastening tape that is difficult to tear when worn or worn. Moreover, it is preferable to form the recessed part for a reinforcement in a part of area | region containing one edge part of a elongate base material sheet, and maintains the softness | flexibility of a fastening tape by forming in such a part. be able to.

  For example, FIGS. 2 and 3 are examples in which a short belt-shaped reinforcing recess 72 a is formed in a part of each of the first end region 75 and the second end region 76.

  The position where the reinforcing recess is formed varies depending on whether it is for infants or for adults, for example, and can be set as appropriate, but the fastening tape can be set from the left and right side edges of the back body of the diaper. When arranged and fixed so as to extend, it is preferable that a part of the region where the reinforcing concave portion is formed is a position where it is fixed to the back body. That is, when the fastening tape is fixed to the back body of the diaper, the reinforcing recess defines a boundary line between a region (fixed region) fixed to the back body of the diaper and a non-fixed region other than the fixed region. It is preferable to be formed in a region straddling both sandwiched regions. The fastening tape 10a shown in FIG. 13 has an area (fixed area) 31 that is fixed to the back of the diaper when the fastening tape 10a is fixed to the back of the diaper, and a non-fixed area other than the fixed area 31. This is an example in which a reinforcing recess 72 a is formed in a region 33 that straddles both regions across a boundary line with the fixed region 32.

  Further, as in the case of the base material 30a of the fastening tape 10a shown in FIG. 13, when a step portion 81 is formed in which one end portion 78 side is narrower than the other end portion 79 side, the step portion It is preferable to form a reinforcing recess 72 a in 81. Thus, if the recessed part for a reinforcement is formed also in a step part, there exists an advantage that it can prevent that a base material cuts off at a step part. That is, the base material which has a step part applies big force to this step part when a wearer wears a diaper or during wearing. Therefore, there has been a problem that the base material is easily broken at the stepped portion. Therefore, it is possible to prevent the base material from being broken by forming the reinforcing concave portion in the stepped portion.

  There is no particular limitation on the pressing condition, that is, the condition for forming the reinforcing recess, and a conventionally known method can be employed. Specifically, methods such as embossing, heat sealing, and ultrasonic sealing can be used. In addition to pressing, a reinforcing recess can be formed by heat treatment.

[1-3] Cutting step:
Next, the manufacturing method of the fastening tape of this invention performs the cutting process which cuts the obtained joined body into a predetermined magnitude | size, and obtains a several fastening tape.

  In this step, the joined body may be appropriately separated so that a fastening tape having a predetermined size and shape can be obtained, and the locus (cutting locus) for separation is not particularly limited. For example, in the case of the joined body 116 shown in FIG. 4, as described above, the straight side edges 116a and 116b may be separated at a predetermined interval.

  Further, in the case of the joined body 16 shown in FIG. 3, that is, one long hook material is placed on one long base sheet, and the first end region of the long base sheet is placed. In the case of a joined body in which a reinforcing recess is formed in each of the second end regions, first, the joined body is made up of a first end region, an intermediate region, and a second end portion as shown in FIG. Cut along an S-curve-shaped cutting trajectory that sequentially passes through the region, the intermediate region, and the first end region, and has an S-curved side edge on one side and a linear side edge on the other side. Two fastening tape intermediates are obtained, and then each of the fastening tape intermediates is cut between the valleys of the S-curved side edges and the straight side edges.

  Thus, there is an advantage that a plurality of fastening tapes can be obtained easily and inexpensively by cutting along an S-curved cutting locus. Further, since trim does not occur, there is an advantage that resources can be effectively used without waste.

  1 and FIG. 2, the joined body 16 is made to have a first end region 75, an intermediate region 74, a second end region 76, and an intermediate region 74 by a first cutting portion 56 (not shown in FIG. 2). , Cut along an S-curve-shaped cutting locus S that sequentially passes through the first end region 75, and has an S-curved side edge 82 on one side and a linear side edge 83 on the other side. The example which obtained the 2 fastening tape intermediate body 17 which has is shown. Further, FIG. 1 shows that each of the obtained fastening tape intermediates 17 is separated between each valley portion of the S-curved side edge and the straight side edge, and the fastening tape as shown in FIG. An example in which a plurality of receiving tapes 10a are obtained is shown. FIG. 14 is a cross-sectional view showing an A-A ′ cross section of the fastening tape 10 a shown in FIG. 13.

  FIG. 5 shows a cutting locus S and a cutting locus K when the joined body 16 is cut into a predetermined size. In addition, although FIG. 5 has shown the example in the case of manufacturing the fastening tape used for a diaper for adults, also when manufacturing the fastening tape for infants, it can cut | disconnect with the same cutting locus. . 5, 6, and 8, the long hook material, the bonding recess, and the reinforcing recess are omitted.

  In order to separate between the valley portion of the S-shaped curved side edge and the straight side edge, as shown in FIG. 5, two tabs are formed on the fastening tape, not only when separating at each valley portion. As can be seen, every other valley can be separated. FIG. 6 shows a cutting trajectory S similar to the cutting trajectory S shown in FIG. 5 and a cutting trajectory K that cuts every other valley. FIG. 7 shows a state in which the fastening tape 10e obtained by separating the joined body 16 by the cutting locus S and the cutting locus K shown in FIG. 6 is fixed to the back body 6 of the diaper 101.

  Furthermore, when the valleys are cut every other part so that two tabs are formed on the fastening tape, a part between the valleys that are not cut off and the straight side edges, for example, perforations, You may form peelable parts, such as. FIG. 8 shows a cutting trajectory S similar to the cutting trajectory S shown in FIG. 5, a cutting trajectory K that separates the valleys every other portion, and a part between the valleys that are not separated and the straight side edges. The formed perforations 37 are shown. Note that a cut may be formed instead of the peelable portion.

  Further, for example, in the case of the joined body 216 shown in FIG. 9, that is, on the one surface of the intermediate region of the long base sheet 11, the two long hook members 13 and 13 are placed at a distance from each other. In the case of the joined body in which the reinforcing recess 72a is formed in each of the first end region 75 and the second end region 76 of the long base sheet 11, the portion between the two long hook members (Intermediate cut portion) 80 is cut along an S-curved cut locus S along the longitudinal direction of the joined body 216 to obtain two fastening tape intermediate bodies 17 and 17, and the obtained fastening tape. Each of the intermediate bodies 17 and 17 is separated between one side edge and the other side edge.

  FIG. 10 is an enlarged view of the diaper 102 in which the joined body 216 shown in FIG. 9 is cut as described above to obtain the fastening tape 10f, and the obtained fastening tape 10f is fixed to the back body 6. The peripheral portion of 10f is shown enlarged. As shown in FIG. 10, the fastening tape 10 f is arranged such that the non-fixed area 32 extends from the side edge of the back body 6, and the fixed area 31 is fixed to the back body 6. In the fastening tape 10f, a reinforcing concave portion 72a is formed in a portion 33 straddling both regions across the boundary line between the fixed region 31 and the non-fixed region 32.

  The cutting locus S for cutting the joined body 216 along the longitudinal direction can be selected as appropriate, and is not limited to the S-curve shape, and may be a straight shape.

  FIG. 11 shows an example in which a cutting locus S for cutting the joined body 216 along the longitudinal direction is linear. 12 cuts the joined body 216 shown in FIG. 11 along a linear cutting locus S to obtain two fastening tape intermediate bodies 17, 17, and the obtained fastening tape intermediate bodies 17, 17. It is an enlarged view of a diaper 103 in which each is separated between one side edge and the other side edge to obtain a fastening tape 10g, and the obtained fastening tape 10g is fixed to the back body 6. The peripheral portion of 10 g is shown enlarged. As shown in FIG. 12, the fastening tape 10 g is arranged such that the non-fixed area 32 extends from the side edge of the back body 6, and the fixed area 31 is fixed to the back body 6. In the fastening tape 10g, a reinforcing concave portion 72a is formed in a portion 33 straddling both regions across the boundary line between the fixed region 31 and the non-fixed region 32.

  15 and 16 are plan views showing fastening tapes 10b and 10c manufactured by another aspect of the manufacturing method of the fastening tape of the first embodiment.

  The fastening tape 10b shown in FIG. 15 has a short strip-like joining recess 71b formed when joining the hook material 85 and the base material 30b, and in addition to this fastening tape 10b, When fixed to the back body of the diaper, the region 33 (fixed region) that is fixed to the back body of the diaper and a region 33 that spans both regions across the boundary line between the non-fixed region 32 other than the fixed region 31 is long. A long band-shaped reinforcing recess 72b is formed over the entire step 81 having a narrow band-shaped reinforcing recess 72b and having one end 78 side narrower than the other end 79 side. It is an example which forms.

  A fastening tape 10c shown in FIG. 16 is a fastening tape used for a tape-type disposable diaper for infants, and is used for joining a short strip formed when the hook member 85 and the base material 30c are joined. In addition to having the recess 71a, when the fastening tape 10c is fixed to the back body of the diaper, an area (fixed area) 31 to be fixed to the back body of the diaper and other than the fixed area 31 This is an example in which a circular reinforcing recess 72 c is formed in a region 33 that straddles both regions across the boundary line with the non-fixed region 32. Note that the fastening tape 10c shown in FIG. 16 has one end (an end on the fixed region 31 side) 78 side narrower than the other end (an end on the non-fixed region 32 side) 79 side. The stepped portion 81 and the portion 33 partially overlap each other.

[2] Manufacturing method of fastening tape (second embodiment):
One embodiment of the method for producing a fastening tape of the present invention is a laminate in which a belt-like long hook material is placed along a longitudinal direction on a part of one surface of a belt-like long base sheet. After obtaining the stacking step and obtaining the laminate, the long base material sheet and the long hook material are joined, and then the region other than the region where the long hook material is placed (that is, it can be fixed to the diaper). A region including the end) is formed by forming a reinforcing recess to obtain a joined body, and a cutting step of obtaining a plurality of fastening tapes by cutting the joined body into a predetermined size. It is a thing.

  According to such a process, in addition to being excellent in the design flexibility of the fastening tape, the produced fastening tape has an effect that it is difficult to break when worn or during wearing while maintaining flexibility. .

  For example, FIG. 22 is a schematic diagram showing a fastening tape manufacturing apparatus 201 that can be used in the method for manufacturing a fastening tape of the second embodiment. The fastening tape manufacturing apparatus 201 shown in FIG. 22 is provided with a joining roll 87 and a reinforcing roll 88 in place of the reinforcing joining roll 54 of the fastening tape manufacturing apparatus 200 shown in FIG. It is an apparatus similar to the fastening tape manufacturing apparatus 200 shown in FIG.

  As shown in FIG. 22, the joining roll 87 includes a cylindrical roll body 87a1, a second pattern roll 87a including a ring-shaped coupling convex portion 87a2 disposed on the outer periphery of the roll body 87a1, and this A second plain roll 87b having a flat contact surface with the elongate base sheet 11 that is paired with the second pattern roll 87a is provided.

  The reinforcing roll 88 includes a cylindrical roll main body 88a1 and a reinforcing convex part 88a2 disposed on the outer periphery of the roll main body 88a1, and the long side direction of the reinforcing convex part 88a2 is the roll main body. A plurality of substantially rectangular parallelepiped third pattern rolls 88a inclined so as to have a predetermined angle with respect to the axial direction of 88a1, and the long base sheet 11 paired with the third pattern rolls 88a. And a third plane roll 88b having a flat contact surface.

[2-1] Placement process:
In the method for producing a fastening tape of the present invention, first, a belt-like long hook material is placed along a longitudinal direction on a part of one surface of a belt-like long base sheet to obtain a laminate. A placement process is performed.

  The long base sheet and the long hook material used in this step are the same as the long base sheet and the long hook material used in the placing step of the method for manufacturing the fastening tape of the first embodiment described above. Can be used, and a laminate can be obtained by the same method.

[2-2] Reinforcement joining process:
Next, in the manufacturing method of the fastening tape of the present invention, after obtaining the laminate, the long base material sheet and the long hook material are joined, and then the region other than the region where the long hook material is placed. Is pressed to form a reinforcing concave portion to obtain a joined body. According to the reinforcement joining process of this embodiment, there exists an advantage that the freedom degree of design of a fastening tape is excellent.

  As a method of joining the long base sheet and the long hook material, a conventionally known method can be appropriately employed. Examples thereof include a method using a hot melt adhesive and other highly fluid adhesives, and a method such as embossing, heat sealing, and ultrasonic sealing.

  For example, when joining a long base material sheet and a long hook material by heat seal processing, specifically, the both ends of the short direction of the long hook material from the surface side of the long hook material By pressing toward the sheet side, a concave portion for bonding can be formed to bond the long hook material and the long base sheet. When joining a long base material sheet and a long hook material by heat sealing, for example, a fastening tape manufacturing apparatus 201 as shown in FIG. 22 can be used. Since the fastening tape manufacturing apparatus 201 is individually provided with a roll (joining roll 87) that forms a concave portion for joining and a roll (reinforcing roll 88) that forms a concave portion for reinforcement, The formation conditions of the reinforcing recess) can be set as appropriate.

  In this step, after joining the long hook material and the long base sheet, the first end region and the second end region are pressed by pressing the first end region and the second end region. It is preferable that the step is to form a reinforcing recess in each of the end regions. According to such a process, a fastening tape can be manufactured without generating trim.

  The shape and forming conditions of the bonding concave portion and the reinforcing concave portion in this step are the same shapes as the bonding concave portion and the reinforcing concave portion formed in the reinforcing bonding step of the method for manufacturing the fastening tape of the first embodiment described above. And forming conditions can be employed.

  For example, in FIG. 22, the bonding roll 87 is pressed from the surface side of the long hook material 13 toward the long base material sheet 11 so as to straddle the long hook material 13 and the long base material sheet 11. After forming the concave part for joining and joining the long hook material 13 and the long base material sheet 11, the concave part for reinforcement is formed by pressing each of the first end region and the second end region. An example of obtaining the joined body 16 is shown.

[2-3] Cutting step:
Next, the manufacturing method of the fastening tape of this invention performs the cutting process which cuts the obtained joined body into a predetermined magnitude | size, and obtains a several fastening tape.

  In this step, a method similar to the cutting step of the method for manufacturing the fastening tape of the first embodiment described above can be adopted.

  For example, in FIG. 22, the joined body 16 is cut along the S-curve-shaped cutting locus S by the first cutting portion 56 to obtain two fastening tape intermediates 17, and the obtained fastening tape intermediate is obtained. An example is shown in which a plurality of fastening tapes 10 a are obtained by separating each of the bodies 17 between the valleys of the S-curved side edges and the straight side edges by the second cutting part 57.

[3] Method for producing fastening tape (third embodiment):
One embodiment of the method for producing a fastening tape of the present invention includes a base material reinforcing step of forming a reinforcing concave portion by pressing a belt-like long base material sheet to obtain a reinforced long base material sheet. After placing the laminated body, a placing step of placing a belt-like long hook material along the longitudinal direction on a part of one surface of the reinforced long base sheet and obtaining the laminated body A joining step for joining a reinforced long base sheet and a long hook material to obtain a joined body, and a cutting step for obtaining a plurality of fastening tapes by separating the joined body into a predetermined size. Is.

  According to such a process, in addition to being excellent in the design flexibility of the fastening tape, the produced fastening tape has an effect that it is difficult to break when worn or during wearing while maintaining flexibility. .

  For example, FIG. 23 is a schematic diagram showing an embodiment of a fastening tape manufacturing apparatus that can be used in the method for manufacturing a fastening tape of the third embodiment. The fastening tape manufacturing apparatus 202 shown in FIG. 23 is the same as that shown in FIG. 22 except that the reinforcing roll 88 of the fastening tape manufacturing apparatus 201 shown in FIG. This is the same apparatus as the adhesive tape manufacturing apparatus 201.

[3-1] Substrate reinforcement step:
In the method for producing a fastening tape of the present invention, first, a reinforcing recess is formed by pressing a belt-like long base sheet to perform a base material reinforcing step for obtaining a reinforced long base sheet. By this reinforcing step, before fixing the long hook material to the long base sheet, it is possible to form a concave portion for reinforcement on the long base sheet, so the degree of freedom in selecting the part for forming the concave portion for reinforcement Has the advantage of improving.

  This step includes a first end region including one end portion in the short direction of the long base sheet, a second end region including the other end portion, and an intermediate position between these regions. It is preferable that the step is to form a reinforcing recess in each of the first end region, the second end region, and the intermediate region by pressing the region. As described above, when the reinforcing concave portion is formed also in the portion (joining and fixing portion) where the hook material is joined (see FIG. 17), delamination between the hook material and the base sheet can be prevented.

  The long base sheet used in this step can be the same as the long base sheet used in the mounting step of the method for manufacturing the fastening tape of the first embodiment described above.

  For the shape and forming conditions of the reinforcing recess in this step, the same shape and forming conditions as the reinforcing recess formed in the reinforcing joining step of the manufacturing method of the fastening tape of the first embodiment described above may be adopted. it can.

  For example, FIG. 23 shows an example in which a reinforcing concave portion is formed by pressing the long base sheet 11 with a reinforcing roll 88 to obtain a reinforced long base sheet (reinforced base sheet 89). ing.

[3-2] Placement process:
Next, the manufacturing method of the fastening tape of the present invention is a laminate in which a band-like long hook material is placed along a longitudinal direction on a part of one surface of a reinforced long base sheet. The mounting process is obtained. In this step, the long hook member is preferably placed on one surface of the intermediate region of the reinforced long base sheet.

  The long hook material used in this step can be the same as the long hook material used in the placing step of the method for manufacturing the fastening tape of the first embodiment described above.

  For example, in FIG. 23, along the longitudinal direction of the reinforcing base sheet 89 on one surface of the intermediate region in the short direction of the long base sheet (reinforced base sheet 89) reinforced by the support roll 53. The example which mounts the strip | belt-shaped elongate hook material 13 and obtains the laminated body 15 is shown.

[3-3] Joining process:
Next, the manufacturing method of the fastening tape of this invention performs the joining process which joins the reinforced long base material sheet and a long hook material, and obtains a laminated body after obtaining a laminated body. By this joining step, the long hook material is firmly joined to the reinforcing base sheet, so that it is possible to reliably and effectively prevent the hook material from peeling off.

  As a method of joining the reinforced long base sheet and the long hook material, a conventionally known method can be appropriately employed. Examples thereof include a method using a hot melt adhesive and other highly fluid adhesives, and a method such as embossing, heat sealing, and ultrasonic sealing.

  For example, when joining a long base material sheet and a long hook material by heat seal processing, specifically, both ends in the short direction of the long hook material were reinforced from the surface side of the long hook material. By pressing toward the long base sheet side, a concavity for bonding can be formed to join the long hook material and the long base sheet.

  For the shape and forming conditions of the bonding recess in this step, it is possible to adopt the same shape and forming conditions as the bonding recess formed in the reinforcing bonding step of the method for manufacturing the fastening tape of the first embodiment described above. it can.

  For example, in FIG. 23, the bonding roll 87 is pressed from the surface side of the long hook material 13 toward the long base material sheet 11 so as to straddle the long hook material 13 and the long base material sheet 11. The example which forms the recessed part for joining, joins the elongate hook material 13 and the reinforcement base material sheet 89, and obtains the conjugate | zygote 16 is shown.

[3-4] Cutting step:
Next, the manufacturing method of the fastening tape of this invention performs the cutting process which cuts the obtained joined body into a predetermined magnitude | size, and obtains a several fastening tape.

  In this step, a method similar to the cutting step of the method for manufacturing the fastening tape of the first embodiment described above can be adopted.

  For example, in FIG. 23, the joined body 16 is cut along the S-curve-shaped cutting locus S by the first cutting portion 56 to obtain two fastening tape intermediate bodies 17, and the obtained fastening tape intermediate An example is shown in which a plurality of fastening tapes 10d are obtained by separating each of the bodies 17 between the valleys of the S-shaped curved side edges and the straight side edges by the second cutting part 57. .

  FIG. 17 is a plan view showing a fastening tape 10d manufactured by the method for manufacturing a fastening tape according to the third embodiment. The fastening tape 10d shown in FIG. 17 is a stopper for a tape-type disposable diaper for infants. It can be used as a receiving tape. The fastening tape 10d shown in FIG. 17 is a region (fixed region) 31 that is fixed to the back of the diaper when the fastening tape 10d is fixed to the back of the diaper. In this example, a rectangular reinforcing recess 72 d is formed so as to be located in the region 33 across both regions across the boundary line with the fixed region 32 and the non-fixed region 32. The fastening tape 10d shown in FIG. 17 has one end (end on the fixed region 31 side) 78 side narrower than the other end (end on the non-fixed region 32 side) 79 side. The stepped portion 81 and the portion 33 partially overlap each other. In addition, although not shown, a bonding recess is formed on the surface opposite to the side on which the reinforcing recess 72d is formed.

[4] Tape-type disposable diapers:
One embodiment of the tape-type disposable diaper of the present invention is composed of the front body 2, the crotch part 4, and the back body 6 as in the tape-type disposable diaper 100 shown in FIG. The top sheet 18 is disposed so as to cover the surface of the absorber 22 and a part thereof is made of a liquid-permeable material, and the back sheet 20 is disposed so as to cover the back surface of the absorber 22 and is made of a liquid-impermeable material. And the fastening tape 10a shown in FIG. 13 which can be fixed to the front body 2 and the back body 6 manufactured by the manufacturing method of the fastening tape of this invention is provided. And this fastening tape 10a is arrange | positioned so that the non-fixed area | region 32 may be extended from the side edge 6a of the back body 6, and the fixed area | region 31 is the back body 6 as shown in FIG. It is fixed to. A reinforcing recess 72a is formed in a region 33 that spans both regions across the boundary line between the fixed region 31 and the non-fixed region 32, and a part of the reinforcing recess 72a is fixed to the back body 6. ing.

  This tape-type disposable diaper is provided with a fastening tape that is difficult to tear when worn or worn while maintaining flexibility while maintaining flexibility.

  In this specification, “front body” means a part covering the abdomen side (front of the body) of the wearer when wearing a diaper, and “inseam” means wearing a diaper on the wearer. In this case, the part covering the inseam of the wearer, “back body”, means a part covering the back side (back of the body) of the wearer when the wearer wears a diaper.

[4-1] Fastening tape:
The fastening tape with which the tape type disposable diaper of this invention is provided is a fastening tape manufactured by the manufacturing method of the fastening tape of this invention (1st-3rd) mentioned above. A diaper provided with such a fastening tape has the advantage that the fastening tape is difficult to break when worn or during wearing while maintaining flexibility.

  Moreover, the fastening tape can fix the front body and the back body. For example, FIG. 20 shows a usage state of the tape-type disposable diaper 100 shown in FIG. 18, and the fastening tape 10 a fixed to the rear body 6 of the diaper 100 is a mechanical fastener disposed on the front body 2. The front patch 12 made of a loop material is detachably fixed. Thus, by fixing the back body 6 to the front body 2, the tape-type disposable diaper 100 can be worn by the wearer.

  Examples of the method for fixing the fastening tape to the back body include a hot melt adhesive, heat sealing, embossing, and ultrasonic sealing.

  Specifically, when wearing a tape-type disposable diaper, the wearer may pull the fastening tape with force in order to firmly fix the diaper. In such a case, the force pulling the fastening tape is concentrated on the boundary portion between the fixed region fixed to the back body and the non-fixed region that moves freely. Therefore, in the conventional tape-type disposable diaper, the fastening tape may be broken at the boundary portion. However, the tape-type disposable diaper of the present invention has a fastening tape by reinforcing the boundary portion. There is an effect that it is hard to break. Moreover, in order to make the fastening tape difficult to break, when the strength of the entire base material is improved, the base material becomes hard and good flexibility cannot be obtained, but the tape-type disposable diaper of the present invention is Since the strength is partially improved by reinforcing the boundary portion, there is an effect that the flexibility of the base material is maintained.

  A tape-type disposable diaper 100 shown in FIG. 18 is an example in which two fastening tapes 10 a shown in FIG. 13 are arranged on each of the left and right side edges 6 a and 6 b of the back body 6. The number of fastening tapes is not particularly limited, but in the case of an adult tape-type disposable diaper, it is preferable that two tapes are arranged like a tape-type disposable diaper 100 shown in FIG. When two fastening tapes are arranged, the tape position and tightening condition are adjusted according to the wearer's body shape, specifically the waist circumference and leg circumference dimensions, as compared to the tape type disposable diapers arranged one by one. There is an advantage that it can be adjusted appropriately.

  Further, when two fastening tapes are arranged, the same type of fastening tape may be used, or different types of fastening tapes may be used. In the tape-type disposable diaper 104 shown in FIG. 21, two fastening tapes 10h, 10i having different widths are arranged on the side edge 6a of the back body 6, and two fastening tapes 10h having different widths are also arranged on the side edge 6b. , 10i. The fastening tape 10h is wider than the fastening tape 10i.

  The tape-type disposable diaper of the present invention is preferably one in which the fastening tape produced by the method for producing a fastening tape of the present invention is joined to the diaper main body by fusion. By joining by fusion | bonding, it can be set as firm joining compared with the adhesion | attachment method etc. which used the adhesive agent, and the situation where a fastening tape falls off from a diaper can be prevented effectively. For example, the tape-type disposable diaper 100 shown in FIG. 18 has a fastening tape by ultrasonic fusion to the side edges 6a and 6b of the back body 6, specifically to the both side edges of the side flap 8 constituted by the side sheet 19. This is an example in which 10a is joined.

[4-2] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

  It is preferable that the absorber is interposed at least in part between the top sheet and the back sheet. Usually, the absorber is interposed between the top sheet and the back sheet by being sandwiched between the top sheet and the back sheet and sealing the peripheral edge thereof. Therefore, the flap part in which the absorber is not interposed is formed between the top sheet and the back sheet at the peripheral part of the absorber. The absorber is interposed in at least a part between the top sheet and the back sheet. More specifically, the absorbent body may be interposed at least in the crotch region, and the absorbent body may extend to the front body and the back body.

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned. A tape-type disposable diaper 100 shown in FIG. 18 is an example in which an hourglass type is used as the absorber 22.

  In addition, a sheet (second sheet) for diffusing liquid such as urine and body fluid may be incidentally disposed on the surface side of the absorber (for example, between the absorber and the top sheet). . When this second sheet is attached, due to the wearer's posture, etc., even when the space on the back side of the top sheet is not sufficiently formed, the absorption rate of urine, body fluid, etc. is difficult to decrease, and the absorption rate decreases. It is possible to prevent leakage of urine and body fluids.

  Examples of the material constituting the second sheet include hydrophilic and liquid-permeable materials such as woven fabric, non-woven fabric, porous plastic, and fluff pulp. Examples of these constituent materials include polypropylene, polyethylene, polyester, rayon, pulp, and composite fibers thereof. As the pulp, crimped fibers such as curly cellulose fibers can be suitably used.

[4-3] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the upper surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the back surface side needs to absorb the wearer's urine. Usually, at least near the surface of the absorber, it is made of a liquid-permeable material that can permeate the wearer's urine and body fluid. As long as at least a part is made of the liquid permeable material, the entire top sheet is not necessarily made of the liquid permeable material.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and subjected to a hydrophilic treatment. There is no restriction | limiting in particular also about the kind of nonwoven fabric, The conventionally well-known nonwoven fabric manufactured by various manufacturing methods, such as air through (card hot air), card | curd embossing, and a spun bond, can be used suitably.

  The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials. In addition, a top sheet (center sheet) made of a liquid permeable material is disposed on the surface of the wearer when the diaper is worn, and another sheet (side sheet) is disposed on the side flap. Sheet) may be arranged. A tape-type disposable diaper 100 shown in FIG. 18 has a top sheet 18 (center sheet 18a) made of a liquid-permeable material at the center thereof, and the side flap 8 has a ventilation / repellency that is resistant to liquid permeation. This is an example in which a side sheet 19 made of an aqueous material is disposed.

[4-4] Backsheet:
A back seat | sheet is a sheet | seat arrange | positioned so that the lower surface (surface located in a wearer's clothing side at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material in order to prevent the wearer's urine from leaking outside the diaper.

  Although there is no restriction | limiting in particular about the arrangement | positioning method, For example, the structure which arrange | positions the back seat | sheet 20 so that it may correspond with the external shape of a diaper like the tape-type disposable diaper 100 shown in FIG. However, it is not always necessary to adopt such a configuration. From the viewpoint of preventing leakage of urine absorbed by the absorber, a back sheet made of a liquid-impermeable material is disposed at least in a portion where the absorber is present. May be.

  Examples of the liquid-impermeable material constituting the back sheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, it is preferable to use a microporous polyethylene film. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet has an advantage that the back sheet is reinforced and the feel (tactile feeling) of the back sheet is improved.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Among these, it is preferable to use a dry nonwoven fabric and a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, and polyester.

[4-5] Solid gather:
The tape-type disposable diaper of the present invention may include a three-dimensional gather in order to prevent side leakage of urine excreted by the wearer. The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming such a three-dimensional gather, the three-dimensional gather serves as a breakwater, and leakage from a leg-diameter opening or the like (so-called “lateral leakage”) can be effectively prevented.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, a stretchable material (a three-dimensional gathered stretchable material) disposed on a part of the water-repellent sheet material and a sheet (gather) formed on the sheet material by the three-dimensional gathered stretchable material can be suitably used.

  The three-dimensional gather may be formed of a sheet material that is completely different from the top sheet or the back sheet, but may be formed by folding back a top sheet (for example, a center sheet) or a side sheet.

  In order to prevent leakage from the crotch part, this three-dimensional gather may be formed at least in the crotch part, but may be formed in the front body or the back body. For example, the tape-type disposable diaper 100 shown in FIG. 18 is an example in which a pair of three-dimensional gathers 26a and 26b are continuously formed from the crotch part 4 to both the front body 2 and the back body 6 along the longitudinal direction. It is. The three-dimensional gathers 26a and 26b are provided with three-dimensional gather elastic members 36a and 36b at the tip portions thereof. Further, at least one pair of solid gathers must be formed, but two or more pairs may be formed.

  The three-dimensional gather may be an inward gather that tilts toward the inside of the diaper, or may be an outward gather that tilts toward the outside of the diaper. Further, a three-dimensional gather (a so-called C-fold gather, Z-fold gather, or the like) in which a bent portion or a folded portion is formed in a part of the height direction can also be used.

[4-6] Various elastic materials:
In the tape-type disposable diaper of the present invention, it is preferable to arrange an elastic material around the legs and further arrange an elastic material around the waist.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented. Further, when the leg stretchable material is disposed, the leg stretchable material contracts on both sides of the absorbent body when changing the diaper, so that the vicinity of the crotch portion is deformed into a bowl shape and a recess is formed. For this reason, urine and body fluid accumulate in the concave portion, and the diaper can be easily replaced without spilling urine and body fluid.

  For example, a tape-type disposable diaper 100 shown in FIG. 18 is an example in which leg gathers are formed by arranging two leg elastic members 40 linearly along the longitudinal direction. The leg-around elastic member 40 is made of rubber thread. However, the leg-surrounding elastic members are not necessarily arranged linearly, and may be arranged in a curved line along the curve of the leg-periphery opening, for example.

  It is preferable that the leg-surrounding stretchable material is disposed in a portion outside the upright line 46 of the three-dimensional gathers 26a and 26b, like the leg-stretching stretchable material 40 of the tape-type disposable diaper 100 shown in FIG. According to such a configuration, it is possible to improve the wearing feeling while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  In addition, although the tape-type disposable diaper 100 shown in FIG. 18 is an example which made the shape, arrangement position, arrangement number, etc. of the leg periphery elastic material 40 left-right symmetric, a left-right asymmetric thing is also contained in the scope of the present invention. Moreover, although the tape-type disposable diaper 100 shown in FIG. 18 shows an example in which two leg elastic members 40 are arranged on one side, only one may be arranged, or three or more may be arranged. . In addition, when using a plurality of leg-around elastic members, their thicknesses and stretch ratios may be set as appropriate according to the purpose, and all of them need not be used.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for a gap to be formed between the diaper and the back, preventing urine leakage from the back, improving the fit of the diaper, and preventing the diaper from falling down.

  In addition, the tape-type disposable diaper 100 shown in FIG. 18 is an example in which a belt-like waist elastic member 42 is disposed along the end edge of the body 6 thereafter. The belt-like waist elastic member 42 is made of an elastic film such as a urethane film. In the tape-type disposable diaper 100 shown in FIG. 18, the waist elastic member 42 is disposed only on the rear body 6 (back side), but may be disposed on the front body 2 (abdominal side).

  In addition, for example, when two fastening tapes 10a are arranged on each of the left and right side edges 6a and 6b of the back body 6 as in the tape-type disposable diaper 100 shown in FIG. It is preferable that the elastic material 42 around the waist is provided along the end edge, and the elastic material 40 around the leg is attached at least along both side edges of the crotch part 4.

  With such a configuration, the fastening tape 10a disposed on the upper side (the edge side of the back body 6) of the two fastening tapes 10a on one side edge side and the elastic material 42 around the waist are integrated. The fit of the diaper around the wearer's waist can be improved. In addition, the fastening tape 10a disposed on the lower side of the two fastening tapes 10a and the leg-surrounding elastic member 40 may be integrated to improve the fit of the diaper around the wearer's leg. it can. The effect is that the fastening tape 10a disposed on the upper side is fastened in substantially the same direction as the edge of the front body 2, and the fastening tape 10a disposed on the lower side is attached to the edge of the front body 2 (upper diaper). It becomes particularly large when it is stopped so as to be pulled up.

  In consideration of the degree of gather contraction and the like, these stretchable materials can appropriately set the constituent material, the elongation rate of the material, the stretched state when fixed, and the like.

  As an elastic material, the elastic material which has been used with the conventional disposable diaper can be used conveniently. Specific examples include elastic rubber, elastic film, elastic nonwoven fabric, etc., as well as thread rubber and flat rubber made of elastic materials such as natural rubber and synthetic rubber (urethane rubber, etc.).

  The stretchable material is preferably fixed in the stretched state in order to exert a sufficient stretch force. For example, when the elastic material is natural rubber or synthetic rubber, it is preferably fixed in a stretched state of 110 to 400%, and more preferably fixed in a stretched state of 200 to 300%. By fixing in the extended state in such a range, a sufficient stretching force can be applied.

  Such a stretchable material can be fixed to other constituent members of the diaper by an adhesive or other means. Examples of the fixing method include a method using a hot melt adhesive and other highly fluid adhesives, and a method using heat, ultrasonic waves, etc. such as heat sealing.

[5] Tape type disposable diaper manufacturing method:
The manufacturing method of the tape type disposable diaper of this invention is demonstrated and illustrated about the case where the tape type disposable diaper 100 shown in FIG. 18 is manufactured. First, the absorbent body 22 and the leg elastic member 40 wrapped in a hydrophilic sheet are placed on the surface of a long sheet material (back sheet material) which is a material of the back sheet 20, and the top sheet is further placed on the surface. By placing a long sheet material (top sheet material) as 18 material, a laminate (diaper continuum) as an intermediate body of the diaper is obtained. At this time, as the top sheet material, two types of a top sheet material corresponding to the center sheet 18 a and a side sheet material corresponding to the side sheet 19 are used. Three-dimensional gathers 26 a and 26 b are formed by providing folded portions on the side sheet material corresponding to the side sheet 19.

  Prior to placing a long sheet material (top sheet material) as a material of the top sheet 18 on the surface of the absorbent body 22 and the leg-surrounding elastic member 40, the fastening tape manufacturing method of the present invention is used. It arrange | positions so that the one end part (joining side edge part of a hook material) of the manufactured fastening tape 10a may extend from the part corresponding to the side edges 6a and 6b of the back body 6 of a diaper. Thereafter, the other end portion (reinforcing recess forming side end portion) of the fastening tape 10a is joined and fixed to a portion corresponding to the back body 6 of the top sheet material, and is bent to the side corresponding to the inner side of the diaper. Temporarily fix to. Thus, the top sheet material to which the fastening tape 10 a is attached is placed so as to cover the absorber 22. In addition, as a means for joining and fixing the fastening tape 10a to the top sheet material, for example, a hot melt adhesive can be applied.

  After the diaper continuous body is formed in this way, a portion corresponding to the opening around the leg of the diaper is cut out in an arc shape and cut (so-called R-cut) to form the opening around the leg, and then at a predetermined position. A plurality of tape-type disposable diapers 100 are manufactured by cutting at a step.

  The method for producing a fastening tape of the present invention can be suitably used as a fastening tape for a tape-type disposable diaper used by infants or adults such as elderly people and persons with disabilities who need care. Moreover, the tape-type disposable diaper of this invention can be used suitably as a diaper for adults, such as an elderly person and a disabled person for infants or the elderly who require nursing care.

It is a schematic diagram which shows the fastening tape manufacturing apparatus which can be used in one Embodiment of the manufacturing method of the fastening tape of this invention. It is a perspective view which expands and shows a part of fastening tape manufacturing apparatus shown in FIG. It is a top view which shows the long base material sheet and long hook material of the part shown to X of FIG. It is a top view which shows the conjugate | zygote used in another embodiment of the manufacturing method of the fastening tape of this invention. It is a top view which shows the cutting locus at the time of cut | disconnecting the conjugate | zygote used in one Embodiment of the manufacturing method of the fastening tape of this invention. It is a top view which shows the cutting locus at the time of cut | disconnecting the conjugate | zygote used in another embodiment of the manufacturing method of the fastening tape of this invention. It is a top view which shows a tape-type disposable diaper provided with the fastening tape obtained by being cut | disconnected by the cutting locus shown in FIG. It is a top view which shows the cutting locus at the time of cut | disconnecting the conjugate | zygote used in another embodiment of the manufacturing method of the fastening tape of this invention. It is a top view which shows the conjugate | zygote used in another embodiment of the manufacturing method of the fastening tape of this invention. It is a top view which shows a tape-type disposable diaper provided with the fastening tape formed with the conjugate | zygote shown in FIG. It is a top view which shows the conjugate | zygote used in another embodiment of the manufacturing method of the fastening tape of this invention. It is a top view which shows a tape-type disposable diaper provided with the fastening tape formed with the conjugate | zygote shown in FIG. It is a top view which shows the fastening tape manufactured by one Embodiment of the manufacturing method of the fastening tape of this invention. It is sectional drawing which shows the A-A 'cross section of the fastening tape shown in FIG. It is a top view which shows the fastening tape manufactured by another embodiment of the manufacturing method of the fastening tape of this invention. It is a top view which shows the fastening tape manufactured by another embodiment of the manufacturing method of the fastening tape of this invention. It is a top view which shows the fastening tape manufactured by another embodiment of the manufacturing method of the fastening tape of this invention. It is a top view showing one embodiment of a tape type disposable diaper of the present invention. It is a top view which expands and shows the fastening tape part of the tape-type disposable diaper shown in FIG. It is a perspective view which shows the use condition of the tape type disposable diaper shown in FIG. It is a top view which shows another embodiment of the tape-type disposable diaper of this invention. It is a schematic diagram which shows another embodiment of the fastening tape manufacturing apparatus which can be used in the manufacturing method of the fastening tape of this invention. It is a schematic diagram which shows another embodiment of the fastening tape manufacturing apparatus which can be used in the manufacturing method of the fastening tape of this invention.

Explanation of symbols

2: front body, 4: crotch part, 6: back body, 6a, 6b: side edge, 8: side flap, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i: fastening tape, 11 , 111: long base sheet, 12: front patch, 13, 113: long hook material, 15: laminate, 16, 116, 216: joined body, 17: fixing tape intermediate, 18: top sheet, 18a: Center sheet, 19: Side sheet, 20: Back sheet, 22: Absorber, 26a, 26b: Three-dimensional gather, 30a, 30b, 30c: Base material, 31: Fixed region, 32: Non-fixed region, 36a, 36b : Three-dimensional gather elastic material, 37: perforation, 40: elastic material around leg, 42: elastic material around waist, 46: standing wire, 51: first long winding roll, 52: second long winding material roll, 3: support roll, 54: roll for reinforcing joining, 54a: first pattern roll, 54a1, 87a2: convex part for coupling, 54a2, 88a2: convex part for reinforcement, 54a3, 87a1, 88a1: roll body, 54b: first Plain roll, 56: first cutting part, 57: second cutting part, 59: adhesive application part, 61: folding part, 62: temporary fixing roll, 62a: convex roll for temporary fixing, 62b: concave roll for temporary fixing 71a, 71b: bonding recess, 72a, 72b, 72c: reinforcement recess, 74: intermediate region, 75: first end region, 76: second end region, 78, 111a, 116a: one End part, 79, 111b, 116b: the other end part, 80: intermediate cut part, 81: step part, 82, 83: side edge, 85: hook material, 87: bonding roll, 87a: second pattern roll, 87b : Two-plane roll, 88: Reinforcing roll, 88a: Third pattern roll, 88b: Third plain roll, 89: Reinforced base sheet, 100, 101, 102, 103, 104: Tape-type disposable diaper, 175: Pressing area 176: Free end region, 200, 201, 202: Fastening tape manufacturing apparatus, S: Cutting locus.

Claims (5)

Consists of each part of the front body, crotch and back body,
An absorber, a top sheet that is arranged so as to cover the surface of the absorber, and at least partly made of a liquid permeable material, and a back sheet that is arranged so as to cover the back surface of the absorber. A back sheet, and a fastening tape capable of fixing the front body and the back body,
The fastening tape is
A placing step of obtaining a laminated body by placing a belt-like long hook material along the longitudinal direction on a part of one surface of the belt-like long base sheet,
After obtaining the laminate, a concave portion for joining is formed by pressing both ends of the long hook material in the short direction from the surface side of the long hook material toward the long base sheet side. Reinforcing and joining step of forming a concave portion for reinforcement by pressing a region other than a region where the long hook material is placed and simultaneously joining the long hook material and the long base material sheet to obtain a joined body When,
A cutting step of cutting the joined body into a predetermined size to obtain a plurality of fastening tapes, and manufactured by a method for producing fastening tapes ,
The said fastening tape is a tape-type disposable diaper which is arrange | positioned so that it may extend from each right and left side edge of the said back body, and a part of said reinforcement recessed part is being fixed to the said back body. The placing step is an intermediate region located in an intermediate portion between the first end region including one end portion in the short direction of the long base sheet and the second end region including the other end portion. Is a step of placing the long hook material on one surface of the layer to obtain the laminate,
In the reinforcing joining step, the first end region and the second end portion are formed by pressing the first end region and the second end region at the same time as forming the concave portion for joining. The tape-type disposable diaper according to claim 1, which is a step of forming the reinforcing recess in each of the regions. The placing step is a step of placing one piece of the long hook material on the intermediate region of the long base sheet, and the cutting step includes the joined body in the first end region. , Cut along an S-curve-shaped cutting locus that sequentially passes through the intermediate region, the second end region, the intermediate region, and the first end region, Two fastening tape intermediates having an edge and a linear side edge on the other side are obtained, and each of the obtained fastening tape intermediates is divided into a valley portion of the S-curved side edge. The tape-type disposable diaper according to claim 2 , wherein the tape-type disposable diaper is a step of obtaining a plurality of the fastening tapes by cutting between the linear side edges. The placing step is a step of placing the two long hook members at an interval in the intermediate region of the long base sheet, and the cutting step is performed between the long hook members. The tape-type disposable diaper according to claim 2 , which is a step of cutting the portion along the longitudinal direction of the joined body. The tape-type disposable diaper according to claim 4 , wherein a trajectory for cutting a portion between the long hook members is linear or S-shaped.

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