JP2010029532A - Fixing tape, method of manufacturing the same, and tape type diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing tape used for fixing a front body section to a back body section of a diaper, preventing the easy peeling of a hook material from a base material, preventing the bending of the tip of the base material and effectively preventing the engagement between the tip of the base material and the hook material. <P>SOLUTION: This fixing tape 10 used for fixing the front body section to the back body section of the diaper, includes the base material 48 and the hook material 44 attached to the surface of the base material 48. The hook material 44 is formed with a base material tip-side recessed section 60 and a base material root-side recessed section 61, which are pressed from the surface side of the hook material 44 to the side of the base material 48, extending from one side edge 44x towards the other side edge 44y of the hook material 44 at the end section 44a of the base material tip side 48a and the end section 44b of the base material root side 48b, respectively. At least the base material tip-side recessed section 60 is formed projecting from the end 44a of the base material tip side 48a of the hook material 44 to the surface of the base material 48 attached with the hook material 44. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fastening tape, a method for producing the same, and a tape-type diaper. More specifically, it is used to fix the front body and the back body of the diaper, the hook material is difficult to peel off from the base material, and the front end portion of the base material is prevented from being bent. The present invention relates to a fastening tape in which engagement with a hook material is effectively prevented, a manufacturing method thereof, and a tape-type diaper including such a fastening tape.

  In general, a tape-type diaper is arranged so as to cover the upper surface of the absorbent body 22 and the absorbent body 22, for example, like a tape-type diaper 150 shown in FIG. 14, and at least a top made of a liquid-permeable material. The sheet 18 is disposed so as to cover the lower surface of the absorber 22 and includes a back sheet 20 made of a liquid-impermeable material, and includes a front body 2, a crotch 4, and a back body 6. The disposable diaper is further provided with a fastening tape 140 arranged to extend from the left and right side edges 6a, 6b of the back body 6 and for fixing the front body 2 and the back body 6 (for example, (See Patent Documents 1 and 2).

  According to such a tape-type diaper 150, the excrement of the wearer passes through the liquid-permeable portion of the top sheet 18 (the center sheet 18a in the figure) and is absorbed by the absorber 22, and normally the liquid Leakage to the outside is prevented by the back sheet 20 made of an impermeable material, and excrement can be held inside the diaper. Further, by fixing the front body 2 and the back body 6 of the diaper to each other with the fastening tape 140, there is an advantage that the wearer can easily attach the diaper.

  By the way, conventionally, as a fastening system for a tape-type diaper, an adhesive fastener that is fixed by the adhesive force of an adhesive has been widely used. However, in recent years, a mechanical structure of a convex member (hook member) and a concave member (loop member) is used. Transition to mechanical fasteners (also referred to as planar fasteners) that are fixed by bonding is progressing.

  As shown in FIG. 15, such a fastening tape is formed by attaching the hook material 144 of the mechanical fastener described above to the surface of the base material 148. As for the method of attaching the hook material, for example, a method of applying and bonding an adhesive to the back surface of the hook material, or using a base material whose surface is coated with a thermoplastic resin film as the base material, the above-mentioned adhesive In combination, the end of the hook material is heat-sealed with a certain width and joined to the surface of the base material. FIG. 15 shows an example in which each end portion 144a of the hook material 144 is heat-sealed by being heated and pressed in a band shape from the surface side of the hook material 144 toward the base material 148 side.

JP 2005-279005 A JP 2005-319319 A

  However, the fastening tape of Patent Document 1 is formed by embossing an identification portion for identifying from a colored side panel. However, since only the identification portion is embossed, the bonding strength of the hook material is low. There was a problem that the hook material was easily peeled off from the base material.

  Further, for example, the fastening tape of Patent Document 2 is one in which only the end portion of the hook material is pressed at a uniform depth and is crimped to the base material. Since a relatively large stress is applied to the end portion of the material, there is a problem that the hook material is easily peeled off from the base material as in the fastening tape of Patent Document 1 described above. Further, in order to prevent the hook material from peeling off, for example, if the width of the pressing portion at the end of the hook material is designed wide, the area used for the engagement of the hook material is reduced. There is also a problem that the engaging force is significantly reduced.

  Further, in such a fastening tape, when a cloth material is used as the base material of the fastening tape, the hook material 144 of the mechanical fastener is engaged with the base material 148 of the fastening tape 140 as shown in FIG. There was a case. In such a case, the wearer or caregiver of the diaper is forced to perform a cumbersome operation of once peeling off the hook material 144 from the base material 148, and the hook material 144 is temporarily attached to the base material of the fastening tape 140. When used in the state of being engaged with 148, the area used for the engagement of the hook material 144 is reduced, so that the engaging force of the fastening tape 140 is reduced.

  The present invention was made to solve such problems of the prior art, and is used to fix the front and back bodies of the diaper, and the hook material is difficult to peel from the base material, and Fastening tape in which the front end portion of the base material is prevented from being bent and the front end portion of the base material is effectively prevented from engaging with the hook material, its manufacturing method, and a tape mold including such a fastening tape It provides diapers.

  As a result of intensive studies to solve the problems of the prior art as described above, the present inventor has found that each of the hook material from the front surface side of the hook material to the base material tip side end portion and the base material base side end portion from the surface side of the hook material. A recess pressed toward the substrate is formed, and at least the recess on the tip of the base is protruded from the end of the hook on the tip of the base to the surface of the base, that is, the hook and the base As a result, the present invention has been completed. Specifically, the present invention provides the following fastening tape, a method for producing the same, and a tape-type diaper.

[1] Used to fix the front body and the back body of a diaper, and includes a base material and a hook material of a mechanical fastener attached to the surface of the base material. A base material tip side concave portion pressed from one surface edge of the hook material to the other side edge toward the base material side from the surface side of the hook material to the end part and the base material base side end part; The base material base side concave part is formed, respectively, and at least the base material tip side concave part extends from the end part on the base material tip side of the hook material so as to straddle the hook material and the base material. Fastening tape formed to reach the outer area of the material.

[2] The fastening tape according to [1], wherein the base-end-side concave portion and the base-base-side concave portion have lost the fastening force of the hook material by the pressing.

[3] The fastening tape according to [1] or [2], wherein the base-end-side concave portion and the base-base-side concave portion are formed only by pressurization, heat sealing, or ultrasonic welding. .

[4] The base material tip side concave portion is configured by any one of the above [1] to [3], which includes a deep concave portion having a deep pressing depth and a shallow concave portion having a shallower pressing depth than the deep concave portion. The fastening tape described.

[5] The base material side recess is formed to extend from the base material side end of the hook material to an outer region of the hook material so as to straddle the hook material and the base material. The fastening tape according to any one of [1] to [4].

[6] In the region where the substrate tip side recess is formed, the substrate tip side recess is such that a distance L1 from the substrate tip side to the substrate root side is from the tip of the substrate to the substrate. The fastening tape according to any one of [1] to [5], wherein the fastening tape is formed so as to be longer than a distance L2 to a region where the tip side concave portion is formed.

[7] A sheet laminating step of obtaining a long sheet laminate by mounting and joining a band-like long hook material along the longitudinal direction of the long base sheet on one surface of the long base sheet; Each side edge portion of the long hook material of the obtained long sheet laminate is pressed with a predetermined width from the surface side of the long hook material toward the long base sheet side to be a recess. A recess forming step for forming a plurality of fastening tapes by separating the long sheet laminate formed with the recesses with a predetermined width, and the recess forming step. In the above, the one side edge portion of the long hook material so that the concave portion formed in at least one side edge portion of the long hook material straddles the long hook material and the long base sheet. To the outer region of the long hook material Production method.

[8] The fastening tape according to [7], wherein, in the concave portion forming step, the concave portions are formed by pressurizing, heat sealing, or ultrasonic welding each side edge portion of the long hook material. Manufacturing method.

[9] In the concave portion forming step, the concave portion formed on the other side edge portion of the long hook material is formed on the long hook material so as to straddle the long hook material and the long base sheet. The method for producing a fastening tape according to [7] or [8], wherein the fastening tape is formed from the other side edge portion to an outer region of the long hook member.

[10] In the fastening tape separating step, the long sheet laminated body in which the concave portion is formed is cut so that a cutting locus draws an S-curve along the longitudinal direction of the long sheet laminated body. The two fastening tape intermediates are obtained, and the gap between the valleys of the side edges formed in the S-shaped curve and the side edges formed in a straight line of each of the obtained fastening tape intermediates is obtained. The manufacturing method of the fastening tape according to any one of [7] to [9], wherein a plurality of the fastening tapes are obtained by separating.

[11] An absorber, disposed so as to cover the upper surface of the absorber, and at least a part of the top sheet made of a liquid-permeable material, disposed so as to cover the lower surface of the absorber, and impermeable to liquid And a back sheet made of a sex material, and is composed of each part of the front body, the crotch part and the back body, and is arranged to extend from the left and right side edges of the back body, the front body and the above A tape-type diaper further comprising a fastening tape for fixing the back body, wherein the fastening tape is the fastening tape according to any one of [1] to [6]. .

  The fastening tape of the present invention is a fastening tape used for fixing the front body and the back body of a diaper, the hook material is difficult to peel off from the base material, and the tip portion of the base material is not bent. This is a fastening tape that is prevented and the engagement between the tip portion of the substrate and the hook material is effectively prevented. Even if the tip portion of the base material is engaged with the hook material, the tip portion of the base material can be easily peeled off from the hook material.

  Moreover, the manufacturing method of the fastening tape of this invention can manufacture the fastening tape of this invention mentioned above simply and at low cost.

  Furthermore, the tape-type diaper of the present invention is provided with the above-described fastening tape of the present invention, the hook material is difficult to peel off from the base material, and the base portion of the base material is prevented from being bent. Since the engagement between the tip portion of the material and the hook material is effectively prevented, it can be used easily and easily without being forced to perform a cumbersome operation of peeling off the base material engaged with the hook material. it can.

  Hereinafter, the fastening tape of the present invention, the manufacturing method thereof, and the best mode for carrying out the tape-type diaper will be specifically described. However, the present invention broadly encompasses a fastening tape having the invention-specific matters, a manufacturing method thereof, and a tape-type diaper, and is not limited to the following embodiments.

  In the present specification, “tape-type diaper” means, as in the tape-type diaper 1 shown in FIG. 1, the absorbent body 22, the top sheet 18 at least partly made of a liquid-permeable material, and liquid-impermeable. A back sheet 20 made of material, and composed of a front body 2, a crotch 4 and a back body 6, and arranged so as to extend from the left and right side edges 6 a and 6 b of the back body 6. A disposable diaper further comprising a fastening tape 10 for fixing the back body 6 to the front body 2 is meant.

  In addition, in this specification, “front body” means a part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. When the wearer wears a diaper, the part covering the inseam of the wearer means the part covering the back side (back of the body) of the wearer.

[1] Fastening tape:
First, an embodiment of the fastening tape of the present invention will be described. The fastening tape of the present invention is used to fix the front body 2 and the back body 6 of the diaper, like the fastening tape 10 shown in FIGS. A hook material 44 of a mechanical fastener attached to the surface of 48, and the hook material 44 has an end portion 44a on a front end side 48a of the base material 48 (hereinafter also referred to as a “base material front end side 48a”), And the end portion 44b of the base side 48b of the base material 48 (hereinafter also referred to as “base material base side 48b”) from one side edge 44x of the hook material 44 to the other side edge 44y of the hook material 44. A base material tip side concave portion 60 and a base material base side concave portion 61 pressed from the front surface side toward the base material 48 side are formed. That is, the base material tip side concave portion 60 is formed at the end portion 44 a of the base material tip side 48 a of the hook material 44, and the base material base side concave portion 61 is formed at the end portion 44 b of the base material base side 48 b of the hook material 44. Yes.

  In the fastening tape 10 of the present invention, at least the base-end-side concave portion 60 protrudes from the end portion 44a on the base-end side 48a of the hook member 44 to the surface of the base member 48 provided with the hook member 44. Is formed. That is, the base material front end side recess 60 is formed on the base material front end side 48a of the hook material 44 so as to straddle the end portion 44a of the base material front end side 48a of the hook material 44 and the base material 48 provided with the hook material 44. It is formed from the end portion 44 a to the outer region of the hook member 44.

  In addition, in the fastening tape 10 of the present invention, at least the base material tip side concave portion 60 straddles the end portion 44a of the base material tip side 48a of the hook material 44 and the base material 48 provided with the hook material 44. Since the hook material 44 is formed from the end portion 44 a on the base material tip side 48 a to the outer region of the hook material 44, the base material tip side concave portion 60 has a depth of the concave portion that is larger than the thickness of the hook material 44. It is formed to be deep.

  With this configuration, the hook material 44 is firmly bonded to the base material 48, and the hook material 44 is difficult to peel from the base material 48. In addition, the base material tip side concave portion 60 is formed from the end portion 44 a on the base material tip side 48 a of the hook material 44 to an outer region (outer region) including the surface of the base material 48, thereby Bending of the tip portion of 48 is prevented, and engagement between the tip portion of the base material 48 and the hook member 44 is effectively prevented. Even if the tip portion of the base material 48 is bent and the tip portion of the base material 48 is engaged with the hook material 44, the tip portion of the base material 48 can be easily moved from the hook material 44. It can be peeled off.

  Moreover, in the fastening tape of the present invention, the concave portion on the tip side of the base material is formed so as to protrude to the base material side, so that the area used for the engagement of the hook material is ensured while ensuring the bonding strength of the hook material. The decrease can be suppressed, and the decrease in the engagement force of the fastening tape can be reduced.

  Here, FIG. 1 is a partially cutaway cross-sectional view showing an embodiment of a tape-type diaper using the fastening tape of the present invention, where the tape-type diaper is developed and viewed from the top sheet side. FIG. FIG. 2 is an enlarged view showing an embodiment of a tape-type diaper using the fastening tape of the present invention, and is an enlarged view showing a fastening tape portion of the tape-type diaper shown in FIG. FIG. 3 is an enlarged view in which the portion of the fastening tape shown in FIG. 2 to which the hook material is attached is further enlarged. FIG. 4 is a schematic cross-sectional view showing a cross section of the fastening tape shown in FIG. 3 cut along the line A-A ′.

  If the above-mentioned base material tip side concave part and base material base side concave part are formed by compressing the surface side of the hook material, for example, the hook material and the base material are simply pressure-bonded by applying pressure ( That is, it may be formed only by pressurization), or may be one in which heat is applied together with pressure to fuse the hook material and the base material. For example, the hook material may be bonded to the base material with an adhesive or the like, and further press the both end portions of the hook material to form the base-end-side concave portion and the base-side concave portion. In addition, the hook material and the base material are joined or temporarily joined by an adhesive or the like, and both end portions of the hook material are further formed with the base-end-side concave portion and the base-side concave portion by heat sealing or ultrasonic welding. It may be joined again.

  In the fastening tape of the present invention, as shown in FIG. 2 and FIG. 3, the hook material 44 is additionally provided from the end portion 44 b of the base material base side 48 b of the hook material 44 in the base material base side recess 61. It is preferable that the base material 48 is formed so as to protrude from the surface. That is, the base material base side concave portion 61 extends from the base material base side 48b of the hook material 44 so as to straddle the end portion 44b of the base material base side 48b of the hook material 44 and the base material 48 provided with the hook material 44. It is preferable that the hook member 44 is formed so as to reach the outer region. By configuring in this way, it is possible to effectively prevent the hook material 44 from peeling from the end portion 44b of the base material base side 48b.

  Further, the fastening tape of the present invention is obtained by mounting and joining a band-like long hook material on one surface of a long base sheet along the longitudinal direction of the long base sheet. For example, the sheet is cut so as to draw an S-shaped curve along the longitudinal direction to obtain two fastening tape intermediates, and each obtained fastening tape intermediate is continuously cut by cutting into individual widths. Can be manufactured automatically. For this reason, by making the base-end-side concave portion and the base-base-side concave portion symmetrical, continuous production of the fastening tape becomes possible, which contributes to improvement in productivity.

  The base material tip side concave portion and the base material base side concave portion, for example, sandwich the base material and the hook material between a pair of embossing rolls arranged opposite to each other, and press the hook material from the surface side toward the base material side. Can be formed. At this time, for at least the embossing roll forming the base material tip side recess, the base material tip side recess straddles the hook material and the base material and reaches the outer region of the hook material from the end of the base material side of the hook material. It arrange | positions in the position which is formed, a hook material and a part of base material outside the edge part by the side of the base material front end side of a hook material are pressed, and the said base material front end side recessed part is formed.

  Moreover, as an adhesive for joining a hook material to a base material, a conventionally well-known hot melt adhesive etc. can be mentioned, for example.

  As shown in FIGS. 2 to 4, the fastening tape 10 of the present invention has a fastening force of the hook member 44 due to the pressing at the time of formation of the recesses in each of the substrate tip side recess 60 and the substrate root side recess 61. It is preferable that each is lost.

  With this configuration, when the front end portion of the base material 48 of the fastening tape 10 is bent toward the surface side of the hook material 44, the front end portion of the base material 48 and the hook material 44 are more difficult to engage with each other. Become. Further, even if the front end portion of the fastening tape 10 is bent inward and engaged with the hook member 44, the front end portion of the fastening tape 10 is easily picked and engaged. The front end portion of the fastening tape 10 can be easily peeled off from the hook material 44.

  Such a base material tip side concave portion 60 and a base material base side concave portion 61 (hereinafter, these may be simply referred to as “concave portions”) are pressed against the hook material of the mechanical fastener toward the base material side. A plurality of protrusions constituting the hook material may be formed by plastic deformation when pressed.

  In addition, in the fastening tape 10 shown in FIGS. 2 to 4, the end portions 44 a and 44 b of the hook members 44 have a constant width from one side edge 44 x to the other side edge 44 y of the hook member 44. In addition, an example in which the base material tip side concave portion 60 and the base material base side concave portion 61 are formed by being pressed at a constant pressing depth is shown. For example, as shown in FIGS. Each of the end portion 44a on the material tip side 48a and the end portion 44b on the base material base side 48b is repeatedly pressed so as to have a predetermined pattern from one side edge 44x to the other side edge 44y of the hook material 44. The base material front end side recess 60 and the base material base side recess 61 may be formed. That is, in the fastening tape 10a shown in FIGS. 5 and 6, the diagonally striped recesses are formed on the base material tip side 48a and base material base side 48b of the hook material 44 and the surface of the base material 48 corresponding thereto. The example when the base-material front end side recessed part 60 and the base-material base side recessed part 61 are formed by repeating is shown.

  As described above, the base material tip side concave portion 60 and the base material base side concave portion 61 are configured such that at least a part of the end portions 44 a and 44 b of the hook material 44 extends from one side edge 44 x to the other side edge 44 y of the hook material 44. What is necessary is just to be formed by pressing. For example, the base material tip side concave portion 60 and the base material base side concave portion 61 may be formed so that the direction of the pattern is reversed (so-called fishbone type). As described above, the repeated pattern in the case where the substrate tip side recess 60 and the substrate root side recess 61 are repeatedly pressed so as to have a predetermined pattern is shown in FIG. It is not limited to the diagonal stripe-like repeating pattern as shown in FIG. 6, and may be various shapes such as a vertical stripe shape, a horizontal stripe shape, a cross shape, and a V shape.

  Here, FIG. 5 is an enlarged view of a portion where the hook material is attached in another embodiment of the fastening tape of the present invention, and FIG. 6 shows the fastening tape shown in FIG. It is a schematic sectional drawing which shows the cross section cut | disconnected along the line. In the fastening tape 10a shown in FIGS. 5 and 6, elements common to the elements of the fastening tape 10 shown in FIG. 3 are given the same reference numerals as those in FIG.

  Moreover, in the fastening tape of this invention, the base-material front end side recessed part may be comprised from the deep recessed part with a deep pressing depth, and the shallow recessed part with a shallower pressing depth than the said deep recessed part, for example. Thus, the base material front end side concave part may be a concave part constituted by repetition of concave parts having different pressing depths.

  By comprising in this way, it will become difficult to peel a base material and a hook material more. Moreover, since it becomes difficult to generate | occur | produce a curvature and a wave at the junction part of a base material and a hook material, when using it for fixing the front body and back body of a diaper, the wearing feeling of a diaper can be improved. For example, when a hook material is joined to a base material by heat sealing or ultrasonic welding, warpage or undulation caused by a difference in thermal shrinkage between the hook material and the base material is shallow and the hook material and the base material are It is relieved by the shallow recess having a high degree of freedom when joining to the material, and the occurrence of warpage, undulation, wrinkles, etc. is effectively suppressed.

  For example, in the fastening tape 10b shown in FIGS. 7 and 8, the base-end-side concave portion 60 includes a deep concave portion 60a having a deep pressing depth and a shallow concave portion 60b having a pressing depth shallower than the deep concave portion 60a. An example is shown. In FIGS. 7 and 8, there are diagonally striped deep recesses 60a and shallow recesses 60b on the base material tip side 48a and base material base side 48b of the hook material 44 and the surface of the base material 48 corresponding thereto. The hook material 44 is formed in a predetermined pattern (that is, a constant repetition interval) from one side edge 44x to the other side edge 44y.

  Thus, the base material front end side recessed part 60 may be comprised from the several recessed part of a different press depth. 6 and 7, each of the deep recessed portion 60a and the shallow recessed portion 60b extends over the end portion 44a of the base material tip side 48a of the hook material 44 and the base material 48 provided with the hook material 44. In addition, although formed from the end portion 44a of the base material tip side 48a of the hook material 44 to the outer region of the hook material 44, for example, although not shown, the deep recess is formed on the base material tip side of the hook material 44. The shallow concave portion may be formed only at the end portion of the hook material on the front end side of the base material. That is, for example, when the shallow concave portion is interrupted at the edge of the hook material base end side, or when the shallow concave pressing depth is shallower than the hook material thickness and the concave portion is not formed to the surface of the base material Even if the deep recess is formed so as to reach the outer region of the hook material from the end of the hook material on the tip side of the hook material, the hook material is difficult to peel off from the substrate, and the substrate The effect of the present invention that the bending of the tip portion of the base material is prevented and the engagement between the tip portion of the base material and the hook material is effectively prevented can be exhibited.

  Here, FIG. 7 is an enlarged view of a portion where the hook material is attached in another embodiment of the fastening tape of the present invention, and FIG. 8 shows the fastening tape shown in FIG. It is a schematic sectional drawing which shows the cross section cut | disconnected along the line. In the fastening tape 10b shown in FIGS. 7 and 8, elements common to the elements of the fastening tape 10 shown in FIG. 3 are denoted by the same reference numerals as those in FIG.

  In addition, in the fastening tape of the present invention, as shown in FIGS. 7 and 8, the base-side recess 61 also has a deep depression 61 a having a deep pressing depth, similar to the base-end-side recess 60 described above. And the shallow recessed part 61b whose pressing depth is shallower than the deep recessed part 61a may be comprised.

  The concave portion constituted by the deep concave portion and the shallow concave portion described above is, for example, a pattern in which convex portions corresponding to the arrangement pattern of the deep concave portion and the shallow concave portion are formed on the pressing surface as a roll that presses the surface side of the hook material. It can be formed by using a roll.

  As a specific pattern roll configuration, for example, on the pressing surface, a high convex portion corresponding to the deep concave array pattern (inverted shape of the deep concave portion) and a low convex portion corresponding to the shallow concave array pattern (shallow). Inverted shape of the concave portion) and a convex portion formed from the concave portion can be mentioned. By using such a pattern roll, a deep concave portion is formed by the high convex portion, and a shallow concave portion is formed by the low convex portion.

  In addition, when the concave portion is formed by ultrasonic welding, a high pressure corresponding to the deep concave portion is formed on one pressing surface of the ultrasonic horn for ultrasonic welding and the receiving roll as a receiving base for the ultrasonic horn. It is preferable to use a projection formed of a convex portion and a low convex portion corresponding to the shallow concave portion. In addition, since it is usually preferable that the pressing surface of the ultrasonic horn is a plain surface, it is more preferable to form the convex portion on the pressing surface of the receiving roll of the ultrasonic horn. In such a case, the ultrasonic horn is disposed on the back surface side of the substrate, and the ultrasonic horn receiving roll is disposed on the front surface side of the hook material to perform ultrasonic welding. As the receiving roll of the ultrasonic horn having a convex portion formed on the pressing surface, for example, a receiving roll having the same configuration as the above-described pattern roll can be suitably used. Moreover, as an ultrasonic horn, a roll-shaped ultrasonic horn can also be used and a fixed-type ultrasonic horn which is not a roll can also be used.

  Further, as shown in FIG. 3, the base material tip side concave portion 60 is a distance L1 from the base material tip side 48a to the base material base side 48b in the region where the base material tip side concave portion 60 is formed (that is, FIG. 3). Is the distance L2 from the tip of the substrate 48 to the region where the substrate tip-side recess 60 is formed (that is, the tip of the substrate 48 to the substrate tip-side recess 60). It is preferable that it is formed so as to be longer than the distance to the end portion. By comprising in this way, engagement with the front-end | tip part of a base material and a hook material is prevented more effectively.

  In the conventional fastening tape, as shown in FIG. 16, the hook material 144 of the mechanical fastener may engage with the base material 148 of the fastening tape 140. The caregiver is forced to perform a cumbersome operation of once peeling off the hook material 144 from the base material 148, and if the hook material 144 is used in a state of being engaged with the base material 148 of the fastening tape 140. Since the area used for engaging the hook material 144 is reduced, there is a problem that the engaging force of the fastening tape 140 is reduced.

  As described above, the distance from the front end of the base material 48 to the region where the base material front end side concave portion 60 is formed is larger than the distance L2 from the base material front end side 48a in the region where the base material front end side concave portion 60 is formed. Even if the tip of the base material 48 is folded back to the hook member 44 side by forming the base material tip side concave portion 60 so that the distance L1 to the root side 48b becomes long, the base material tip side concave portion 60 In addition, the engagement between the tip portion of the base material 48 and the hook member 44 is effectively prevented, and there is no problem that the complicated operation is forced or the engagement force of the fastening tape 10 is reduced. .

  In addition, when the concave portion is formed only on the surface of the hook material and the concave portion is used to prevent the engagement between the hook material and the base material, the concave portion formed in the hook material from the base end side to the base side of the base material is formed. The distance (that is, the width of the recess) is increased, the area used for engaging the hook material other than the recess is reduced, and the engaging force of the fastening tape is significantly reduced. In addition, it is not preferable in terms of manufacturing cost to make a portion that loses or lowers the original engagement function in a relatively expensive hook material as a member constituting the diaper.

  The specific length of the above-described “distance L1 from the base material tip side 48a to the base material base side 48b in the region where the base material tip side recess 60 is formed” is not particularly limited. It is preferably 4 to 12 mm, and more preferably 6 to 10 mm.

  By comprising in this way, sufficient fastening force can be left to a hook material. In addition, when the pressing is performed by heat sealing or ultrasonic welding, sufficient bonding strength by heat sealing or the like can be expressed.

  As shown in FIG. 4, the back surface of the base material 48 that constitutes the fastening tape 10 is preferably configured to have a flat shape without any pressing unevenness on the surface of the hook material 48.

  When the back surface of the substrate is flat, a plain roll having a flat surface may be used as a roll for pressing the back surface side of the substrate.

  In the fastening tape of the present invention, a loop material that can be fastened to the hook material (hereinafter sometimes referred to as “back surface side loop material”) may be attached to the back surface of the base material.

  It is preferable that the back surface side loop material is bonded to the back surface side of the base material after forming the base material tip side concave portion and the base material base side concave portion. The back surface side loop material can be bonded using a hot melt adhesive or the like.

  With this configuration, for example, as shown in FIG. 9, a tape-type diaper in which two fastening tapes 10 x and 10 y of the present invention are arranged on each of the left and right side edges 6 a and 6 b of the back body 6. 1, one fastening tape 10 x at each side edge 6 a, 6 b is fastened to the front patch 12, and the other fastening tape 10 y is fastened to the front patch 12. It can also be fixed to the back side loop material on the back side.

  Such a fastening tape is excellent in that the tape position and the tightening degree can be adjusted in accordance with the wearer's body shape, specifically, the waist circumference and leg circumference dimensions.

  Here, in the tape-type diaper 1 shown in FIG. 9, two fastening tapes 10 of the present invention are arranged on each of the left and right side edges 6a and 6b of the back body 6 (fastening tape 10x, 10y).

  For example, when the back surface side loop material is attached to the back surface of the base material or the back surface of the base material, if irregularities appear on the surface of the back surface side loop material, another surface of the fastening tape When the fastening tape is fastened, a sufficient fastening force may not be obtained due to the unevenness, and other fastening tapes may be easily detached.

  In addition, in the fastening tape of the present invention, separately from the recesses (the substrate tip side recesses and the substrate root side recesses) formed at the end of the hook material on the tip side of the base material and the end of the base material side. In addition, another concave portion (hereinafter sometimes referred to as “central concave portion”) may be formed in a part of the central portion of the hook material.

  As a fastening tape in which such a central recess is formed, for example, as shown in FIG. 10, a part of the central portion of the hook material 44 is formed from one side edge 44 x of the hook material 44 to the other side edge 44 y. 11, the fastening tape 10 c formed with the central concave portion 63 a pressed in a dot shape at a predetermined interval, or a part of the central portion of the hook material 44 is on one side of the hook material 44 as shown in FIG. 11. A fastening tape 10d in which a central recess 63b pressed with a predetermined width is formed from the edge 44x to the other side edge 44y.

  Here, FIG.10 and FIG.11 is the enlarged view which expanded the site | part to which the hook material was attached in other embodiment of the fastening tape of this invention. In the fastening tapes 10c and 10d shown in FIG. 10 and FIG. 11, elements common to the respective elements of the fastening tape 10 shown in FIG.

  By forming the central concave portion, it is possible to effectively prevent the central portion of the hook material from being lifted, warped, and wavy.

  The shape of the central recess is not particularly limited. For example, as shown in FIG. 10, two rows of dots are formed at predetermined intervals from one side edge 44x to the other side edge 44y of the hook member 44. A central recess 63a pressed in a staggered manner can be given as a suitable example. By comprising in this way, the effect by the center recessed part 63a mentioned above can be expressed efficiently, without reducing the fastening force of the center part of the hook material 44 significantly.

  There is no particular limitation on the pressing depth of the central concave portion, but the central concave portion may be pressed by the central concave portion with a pressing force capable of pressing the central portion of the hook material to the base material. preferable. Specifically, it is more preferable that the pressing depth is approximately the same as the pressing depth of the concave portion on the front end side of the base material.

  The “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. This hook material is attached to the surface of the 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.

  On the other hand, as the “loop material”, a material having loop-like fibers arranged on the surface is often used. By superposing the 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 firmly peeled and firmly fixed.

  For example, in the tape-type diaper 1 shown in FIG. 1, a hook material 44 of a mechanical fastener is attached to the base material 48 of the fastening tape 10. On the other hand, the front body 12 is provided with a front patch 12 made of a loop material 52 of a mechanical fastener, and is configured so that the hook material 44 can be fixed.

  With such a configuration, the back body 6 of the diaper can be fixed to the front body 2, and the diaper can be worn by the wearer. FIG. 9 is a diagram illustrating a usage state of the tape-type diaper 1 illustrated in FIG. 1, and illustrates a state where the tape-type diaper 1 is attached to the wearer using the fastening tape 10.

  In addition, as a raw material of such a hook material, synthetic fiber which consists of polyolefin (polyethylene, polypropylene, etc.), polyester, aliphatic polyamide (so-called nylon), and other thermoplastic resins can be used, for example. In particular, polyethylene and polypropylene can be preferably used. When such a material is formed, for example, by using a heated pattern roll, the formation of the recess and bonding to the base material by heat sealing can be performed simultaneously.

  The “base material” functions as a main body of the fastening tape 10 by attaching the hook material 44 and fixing the fastening tape 10 to the left and right side edges 6 a and 6 b of the back body 6.

  As the material of the base material, sheet materials made of various nonwoven fabrics such as spunbond, SMS (spunbond / meltblown / spunbond), SMMS (spunbond / meltblown / meltblown / spunbond), card embossing, resin bond, etc. are used. be able to. In view of strength, it is preferable to use a sheet material made of a spunbonded nonwoven fabric.

  Examples of the constituent material of the nonwoven fabric include synthetic fibers made of polyolefin (polyethylene, polypropylene, etc.), polyester, aliphatic polyamide (so-called nylon), 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. In general, when a single fiber is used, polyolefin is often used, but it is also preferable to use polyester in consideration of strength.

  Moreover, the laminated body which laminated | stacked the some nonwoven fabric and film can also be used as a raw material of a base material. When a film laminate is used, when a non-woven fabric or loop material (back surface side loop material) that is easily engaged with the hook material is disposed on the surface opposite to the surface on which the hook material is disposed, as shown in FIG. The other fastening tape 10y can be fastened to the back side of one fastening tape 10x.

[2] Manufacturing method of fastening tape:
Next, an embodiment of a method for producing a fastening tape of the present invention will be described. The method for producing a fastening tape according to the present invention includes a long sheet laminate in which a belt-like long hook material is placed and bonded to one surface of a long base sheet along the longitudinal direction of the long base sheet. And pressing each side edge of the hook material of the obtained long sheet laminate with a predetermined width from the surface side of the long hook material toward the long base sheet side. A recess forming step for forming a recess, and a fastening tape separating step for obtaining a plurality of fastening tapes by separating the long sheet laminate formed with the recess with a predetermined width. In addition, the concave portion formed on at least one side edge of the long hook material extends from the one side edge of the long hook material so as to straddle the long hook material and the long base sheet. It is formed to reach the outer region.

  By comprising in this way, the fastening tape of this invention demonstrated until now can be manufactured simply and at low cost.

  Hereinafter, the manufacturing method of the fastening tape of the present invention will be described more specifically for each step. Here, FIG. 12A-FIG. 12C are top views which show each process in one Embodiment of the manufacturing method of the fastening tape of this invention. 12A shows the sheet stacking step, FIG. 12B shows the recess forming step, and FIG. 12C shows the fastening tape separating step.

[2-1] Sheet lamination step:
In the manufacturing method of the fastening tape of the present invention, first, as shown in FIG. 12A, a long base sheet 78 is prepared, and the long base sheet 78 is formed on one surface of the long base sheet 78. A long sheet laminate 71 is obtained by placing and joining a strip-like long hook material 74 along the longitudinal direction of the sheet (sheet lamination step).

  In the case of forming the long sheet laminate 71, it is preferable that the long base sheet 78 and the long hook material 74 are previously bonded or temporarily bonded by the adhesive 92. In the sheet stacking step shown in FIG. 12A, an adhesive 92 is applied to the back surface of the long hook material 74, and the back surface on which the adhesive 92 has been applied is superposed on the long base sheet 78 to form a long sheet laminate 71. Is forming. In addition, as the long hook material 74, you may make it use what apply | coated the adhesive agent 92 to the back surface previously.

[2-2] Concave formation step:
Next, as shown in FIG. 12B, the respective side edge portions 74 a and 74 b of the long hook member 74 of the obtained long sheet laminate 71 are moved from the surface side of the long hook member 74 to the long base sheet. The concave portion 80 is formed by pressing toward the 78 side with a predetermined width (recess forming step).

  In this recess forming step, the long hook material 74 is placed from one side edge 74a of the long hook material 74 to the recess 80a formed in at least one side edge 74a of the long hook material 74. The long base sheet 78 is formed so as to protrude from the surface. That is, the recess 80 a is formed from the side edge portion 74 a of the long hook material 74 to the outer region of the long hook material 74 so as to straddle the long hook material 74 and the long base sheet 78.

  For example, the concave portion 80 sandwiches the long sheet laminated body 71 between a pair of embossing rolls arranged to face each other, and presses the long hook material 74 from the surface side toward the long base sheet 78 side. Can be formed.

  In the recess forming step, it is preferable to use a plain roll having a flat contact surface with the long base sheet 78 as a roll for pressing the back side of the long base sheet 78.

  When joining the long base material sheet 78 and the long hook material 74 in the recess forming step, the pressing roll is heated to heat seal the long base material sheet 78 and the long hook material 74. To do.

  On the other hand, when the long base sheet 78 and the long hook material 74 are already joined, it is not always necessary to heat the pressing roll, and the pressing roll is merely pressed. May be.

  In this recess forming step, the long hook material 74 is placed from the other side edge 74 b of the long hook material 74 to the concave portion 80 b formed on the other side edge 74 b of the long hook material 74. You may form so that it may protrude on the surface of the made long base material sheet 78. FIG. That is, you may form from the side edge part 74b of the elongate hook material 74 to the outer area | region of the elongate hook material 74 so that the recessed part 80b may straddle the elongate hook material 74 and the elongate base material sheet 78.

[2-3] Fastening tape separation step:
Next, as shown in FIG. 12C, a plurality of fastening tapes 70 are obtained by separating the long sheet laminate 71 formed with the recesses 80a and 80b with a predetermined width (fastening tape separating step). According to the method as described above, a large number of fastening tapes can be produced simply and efficiently.

  For example, as shown in FIG. 12C, the fastening tape separating process is performed by cutting the long sheet laminate 71 so that the cutting locus draws an S-curve along the longitudinal direction of the long sheet laminate 71. Thus, two fastening tape intermediate bodies 72 are obtained, and between the valley portions of the side edges formed in the S-curve shape of the obtained fastening tape intermediate bodies 72 and the side edges formed in a straight line. A method of obtaining a plurality of fastening tapes 10 can be mentioned by cutting off the.

  In addition, as a cutting method of this sheet | seat, the method of cut | disconnecting in the S shape so that the locus | trajectory of the said cutting may straddle the elongate hook material 74 in the width direction can be mentioned. By configuring in this way, the hook members 44 are respectively disposed on the side of the ridges formed in the S-curve shape of each fastening tape intermediate body 72.

  The cutting of the long sheet laminate 71 is not particularly limited as long as it is cut into a continuous shape. Usually, as shown in FIG. 12C, the locus is a continuous S shape, that is, a periodic wave shape. It is preferable to cut | disconnect so that it may become. This makes it possible to obtain a large number of fastening tapes at a time.

  When each fastening tape intermediate is obtained in this manner, a side edge valley formed in an S-curve shape and a side edge formed linearly in each obtained fastening tape intermediate A plurality of fastening tapes are obtained by separating the gaps. According to the method as described above, a large number of fastening tapes can be produced simply and efficiently.

  Specifically, as shown in FIG. 13, the gap between the side edge trough portion 102 formed in the S-curve shape of each fastening tape intermediate body 72 and the side edge 104 formed in a straight line is separated. Thus, a plurality of fastening tapes 70 are obtained. In the example shown in the figure, between the valleys 102 of the side edges formed in the S-curve shape of each fastening tape intermediate body 72 and the side edges 104 formed in a straight line, in the direction orthogonal to the side edges 104. A plurality of fastening tapes 70 are obtained by separating them.

  A plurality of fastening tapes can be obtained by separating the fastening tape intermediate in this way. However, it is preferable to temporarily fix the hook material and the fastening tape prior to the “separation”. This is because, when the fastening tape having a free end is in a floating state, there is a possibility that the free end may cause problems such as being caught in a manufacturing facility when continuous production is performed.

  For example, the fastening tape intermediate is folded back so that the hook material is on the inside between the portion where the hook material is attached and the side edge formed in a straight line, and the hook material is placed on the surface of the long base sheet. After temporarily fixing, it is preferable to separate between the valley portion of the side edge formed in the S-curve shape and the side edge formed in the straight shape. Folding work for multiple fastening tapes at once and continuously by temporarily fastening between the valleys of the side edges formed in an S-shaped curve and the side edges formed in a straight line Compared with the case where the folding operation is performed after “separation”, the folding operation can be performed stably and efficiently.

  In the manufacturing method shown in FIG. 13, the fastening tape intermediate 72 is folded back so that the hook material 84 is on the inner side between the portion where the hook material is attached and the side edge 104 formed linearly. 84 is temporarily fixed to the surface of the long base material sheet 78 (temporary fixing portion 86), and then, between the valley portion 102 of the side edge formed in the S-curve shape and the side edge 104 formed in the linear shape. This is an example where

[3] Tape-type diapers:
Next, one embodiment of the tape-type diaper of the present invention will be specifically described. The tape-type diaper of the present invention includes the above-described fastening tape of the present invention as the fastening tape. More specifically, the absorbent body is disposed so as to cover the upper surface of the absorbent body, and is disposed so as to cover at least a part of the liquid permeable material and the lower surface of the absorbent body. A back sheet made of a permeable material, and is composed of each part of the front body, the crotch part and the back body, and is arranged so as to extend from the left and right side edges of the back body, the front body and the back body Is a tape-type diaper that is the above-described fastening tape of the present invention.

[3-1] Fastening tape:
If the tape type diaper of this invention is provided with the fastening tape of this invention already demonstrated as the fastening tape, there will be no restriction | limiting about another structure. However, it is preferable that two fastening tapes of the present invention are arranged on each of the left and right side edges of the back body.

  For example, in the tape-type diaper 1 shown in FIGS. 1 and 5, two fastening tapes 10 of the present invention are disposed on each of the left and right side edges 6 a and 6 b of the back body 6. In this way, the tape type diaper in which two fastening tapes are arranged is compared with the tape type diaper in which one piece is arranged at a time, and the wearer's body shape, specifically, the waist circumference and leg circumference dimensions. It is excellent in that the tape position and tightening condition can be adjusted according to the situation.

  The tape-type diaper of the present invention is preferably one in which the fastening tape of the present invention is joined to the diaper main body by fusion. By joining by fusion | bonding, compared with the adhesion | attachment using an adhesive agent etc., firm joining can be aimed at and the situation where a fastening tape falls off from a diaper main body can be prevented effectively. For example, the tape-type diaper 1 shown in FIG. 1 is ultrasonically bonded to the side edges 6a and 6b of the back body 6 of the diaper main body, more specifically, to both side edges of the side flap 8 constituted by the side sheet 19. It is the example which joined the fastening tape 10 of this invention.

[3-2] 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. The tape-type diaper 1 shown in FIG. 1 is an example in which an hourglass-type absorber 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.

[3-3] 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. The tape-type diaper 1 shown in FIG. 1 has a top sheet 18 (center sheet 18a) made of a liquid-permeable material at the center of the diaper, and the side flap 8 part of the diaper is resistant to liquid permeation. This is an example in which a side sheet 19 made of a breathable water repellent material is disposed.

[3-4] 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 because it is necessary 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 diaper 1 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 backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. 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 is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[3-5] Solid gather:
In order to prevent the side leakage of the urine excreted by the wearer, a three-dimensional gather may be provided. 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 becomes a breakwater, and leakage from a leg opening or the like of the diaper (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. For example, the tape-type diaper 1 shown in FIG. 1 is an example in which the three-dimensional gathers 26 (26a, 26b) are formed by folding the side sheets 19. However, the three-dimensional gather may be formed by folding back members other than the side sheets.

  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 diaper 1 shown in FIG. 1 has a pair of three-dimensional gathers 26 (26a, 26b) formed continuously from the crotch part 4 to both the front body 2 and the back body 6 along the longitudinal direction of the diaper. An example is shown. The three-dimensional gather 26 (26a, 26b) is provided with a three-dimensional gather expansion / contraction material 36 (36a, 36b) at the tip 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. For example, the tape-type diaper 1 shown in FIG. 1 is an example in which the three-dimensional gather 26 (26a, 26b) is inwardly gathered.

[3-6] Various elastic materials:
In a tape-type diaper, it is preferable to arrange an elastic material around the legs and 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, the tape-type diaper 1 shown in FIG. 1 is an example in which leg gathers are formed by arranging two leg-around elastic members 40 linearly along the longitudinal direction of the diaper. 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.

  For example, the leg elastic member 40 is preferably disposed on the outer side of the upright line 46 of the three-dimensional gather 26 as in the tape-type diaper 1 shown in FIG. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  The tape-type diaper 1 shown in FIG. 1 shows an example in which the shape, arrangement position, number of arrangements, etc. of the leg elastic members 40 are bilaterally symmetric. However, these are also included in the scope of the present invention. It is. And in the tape-type diaper 1 shown in FIG. 1, although the example in which the leg periphery elastic material 40 was arrange | positioned two per one side was shown, only one may be arrange | positioned and three or more may be arrange | positioned. Good. Further, when using a plurality of leg-surrounding stretchable materials, the thickness, stretch rate, etc. may be set as appropriate according to the purpose, and it is not necessary to use the same for all.

  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 gaps to be formed around the waist and prevents urine leakage from around the waist. In addition, the fit of the diaper to the wearer is improved, and the diaper is prevented from falling down.

  In addition, the tape-type diaper 1 shown in FIG. 1 is the example which has arrange | positioned the strip | belt-shaped waist circumference elastic material 42 along the edge of the back body 6 of a diaper. The belt-like waist elastic member 42 is made of an elastic foam such as urethane foam. In the illustrated example, the waist elastic member 42 is disposed only on the back body (back side), but the waist elastic material may be disposed on the front body (abdominal side).

  For example, when two fastening tapes 10 are arranged on each of the left and right side edges 6a and 6b of the back body 6 as in the tape-type diaper 1 shown in FIG. It is preferable that the elastic material 42 around the waist is attached along the edge and the elastic material 40 around the leg is attached at least along both side edges of the crotch portion 4.

  With the configuration as described above, the fastening tape 10 disposed on the upper side of the two fastening tapes 10 and the waist elastic member 42 are integrated to improve the fit of the diaper around the wearer's waist. be able to. Moreover, the fastening tape 10 arrange | positioned below among the two fastening tapes 10 and the leg periphery expansion-contraction material 40 can be united, and the fit property of the diaper around a wearer's leg can be improved. The effect is that the fastening tape 10 arranged on the upper side is fastened in substantially the same direction as the edge of the front body 2, and the fastening tape 10 arranged on the lower side is attached to the edge side (upper diaper) of the front body 2. It becomes particularly large when it is stopped so as to be pulled up.

  For these stretchable materials, after considering the degree of shrinkage of gathers, etc., the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

  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 foam (urethane foam, etc.), 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.

  The stretchable material as described above is fixed to other constituent members of the diaper by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

[4] Tape type diaper manufacturing method:
Hereinafter, the manufacturing method of the tape type diaper of this invention is demonstrated in the example in the case of manufacturing the tape type diaper 1 shown in FIG. 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. A three-dimensional gather 26 is formed by providing a folded portion on the side sheet material corresponding to the side sheet 19.

  In the diaper continuous body obtained as described above, a portion corresponding to the opening around the leg of the diaper is cut out in an arc shape and cut (R cut) to form an opening around the leg. Finally, the fastening tape 10 of the present invention is attached to the side edges 6a and 6b of the back body 6 of the diaper, and the continuous diaper is cut into individual diapers, whereby the tape-type diaper 1 is manufactured. At this time, it is preferable that the left and right side edge portions of the back body 6 and the end portion of the fastening tape 10 are joined by fusion such as heat sealing.

  In addition to the method described above, a fastening tape is previously attached to the top sheet material, and on the surface of the back sheet material, the absorbent body wrapped in a hydrophilic sheet and the elastic material around the legs are placed, Furthermore, you may obtain a diaper continuous body by mounting the top sheet material in which the fastening tape was attached to the surface. The series of steps as described above can be continuously performed by mechanical means. For example, by adopting a method / apparatus such as continuously feeding a long sheet material from a roller, continuous production of a tape-type diaper becomes possible, which contributes to improvement of productivity.

  The fastening tape of the present invention can be suitably used as a fastening tape for fixing the front and back bodies of a diaper. Moreover, the tape type diaper of this invention can be utilized 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 partially cutaway sectional view showing one embodiment of a tape type diaper using the fastening tape of the present invention, and is a figure showing the state where a tape type diaper was developed and seen from the top sheet side. It is an enlarged view which shows one Embodiment of the tape type diaper using the fastening tape of this invention, and is a figure which expands and shows the fastening tape part of the tape type diaper shown in FIG. It is the enlarged view which expanded further the site | part to which the hook material of the fastening tape shown in FIG. 2 was attached. It is a schematic sectional drawing which shows the cross section which cut | disconnected the fastening tape shown in FIG. 3 along the A-A 'line. It is the enlarged view to which the site | part with which the hook material was attached in other embodiment of the fastening tape of this invention was expanded. It is a schematic sectional drawing which shows the cross section which cut | disconnected the fastening tape shown in FIG. 5 along the B-B 'line. It is the enlarged view to which the site | part with which the hook material was attached in other embodiment of the fastening tape of this invention was expanded. It is a schematic sectional drawing which shows the cross section which cut | disconnected the fastening tape shown in FIG. 7 along the C-C 'line. It is a perspective view which shows the state which uses the tape-type diaper using the fastening tape of this invention. It is the enlarged view to which the site | part with which the hook material was attached in further another embodiment of the fastening tape of this invention was expanded. It is the enlarged view to which the site | part with which the hook material was attached in further another embodiment of the fastening tape of this invention was expanded. It is a top view explaining the sheet | seat lamination process in one Embodiment of the manufacturing method of the fastening tape of this invention. It is a top view explaining the recessed part formation process in one Embodiment of the manufacturing method of the fastening tape of this invention. It is a top view explaining the fastening tape cutting-off process in one Embodiment of the manufacturing method of the fastening tape of this invention. It is a top view explaining the other example of the fastening tape separation process in one Embodiment of the manufacturing method of the fastening tape of this invention. It is a partially cutaway sectional view showing a conventional tape type diaper, and is a view showing a state in which the conventional tape type diaper is developed and viewed from the top sheet side. It is the enlarged view which expanded further the site | part provided with the hook material of the fastening tape shown in FIG. It is a side view which shows the conventional fastening tape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,150: Tape type diaper, 2: Front body, 4: Crotch part, 6: Back body, 6a, 6b: Side edge, 8: Side flap, 10, 10a, 10b, 10x, 10y: Fastening tape, 12 : Front patch, 18: Top sheet, 18a: Center sheet, 19: Side sheet, 20: Back sheet, 22: Absorber, 26, 26a, 26b: Three-dimensional gather, 36, 36a, 36b: Three-dimensional gather elastic material, 40 : Stretch material around leg, 42: Stretch material around waist, 44: Hook material, 44a: End part (end part on the tip side of the base material), 44b: End part (end part on the base material base side), 44x: One Side edge (one side edge of the hook material), 44y: the other side edge (the other side edge of the hook material), 46: standing line, 48: base material, 48a: base material tip side, 48b: base material base Side, 52: loop material, 60: base end side of substrate Part (concave part), 60a: deep concave part, 60b: shallow concave part, 61: base part base side concave part (concave part), 61a: deep concave part, 61b: shallow concave part, 63a, 63b: central concave part (concave part), 70: fixing Tape: 71: Long sheet laminate, 72: Fastening tape intermediate, 74: Long hook material, 74a: Side edge (one side edge of the long hook material), 74b: Side edge (long) 78: long base sheet, 80, 80a, 80b: concave portion, 84: hook material, 86: temporary fixing portion, 102: valley portion, 104: side edge, 140: stop Adhesive tape, 144: hook material, 144a: end (end of hook material), 148: base material.

Claims (11)

Used to fix the front and back of diapers,
Comprising a base material and a hook material of a mechanical fastener attached to the surface of the base material,
The hook material extends from one side edge of the hook material to the other side edge toward the base material side from the surface side of the hook material to the end portion on the base end side and the base end side of the base material. The base material tip side concave portion and the base material base side concave portion pressed are respectively formed,
At least the base-end-side concave portion is a fastening tape that is formed from the end portion of the hook material to the outer region of the hook material so as to straddle the hook material and the base material. .   The fastening tape according to claim 1, wherein the base-end-side concave portion and the base-base-side concave portion have lost the fastening force of the hook material by the pressing.   The fastening tape according to claim 1 or 2, wherein the base material tip side concave portion and the base material base side concave portion are formed only by pressing, heat sealing, or ultrasonic welding.   The said base-material front end side recessed part is comprised from the deep recessed part with a deep pressing depth, and the shallow recessed part whose pressing depth is shallower than the said deep recessed part, The fastening as described in any one of Claims 1-3 tape.   The base material side recess is formed from the end of the base material side of the hook material to an outer region of the hook material so as to straddle the hook material and the base material. 5. The fastening tape according to any one of 4 above.   In the region where the substrate tip side recess is formed, the distance L1 from the substrate tip side to the substrate root side in the region where the substrate tip side recess is formed is such that the substrate tip side recess is from the tip of the substrate. The fastening tape according to any one of claims 1 to 5, wherein the fastening tape is formed so as to be longer than a distance L2 to a region where the is formed. A sheet laminating step of obtaining a long sheet laminate by placing and joining a band-like long hook material along the longitudinal direction of the long base sheet on one surface of the long base sheet;
Each side edge portion of the long hook material of the obtained long sheet laminate is pressed with a predetermined width from the surface side of the long hook material toward the long base sheet side to be a recess. Forming a recess,
A fastening tape separating step of obtaining a plurality of fastening tapes by separating the long sheet laminate formed with the recesses at a predetermined width;
In the recess forming step, the one of the long hook members is formed so that a recess formed in at least one side edge of the long hook member straddles the long hook member and the long base sheet. A method for manufacturing a fastening tape, which is formed from the side edge portion to the outer region of the long hook material.   The method for producing a fastening tape according to claim 7, wherein, in the recess forming step, the recesses are formed by pressurizing, heat-sealing, or ultrasonically welding each side edge of the long hook material.   In the recess forming step, the other hook of the long hook member is formed so that a recess formed on the other side edge of the long hook member straddles the long hook member and the long base sheet. The method for manufacturing a fastening tape according to claim 7 or 8, wherein the fastening tape is formed from a side edge portion to an outer region of the long hook member. In the fastening tape separating step, the long sheet laminate formed with the recesses is cut so that a cutting locus draws an S-curve along the longitudinal direction of the long sheet laminate. The fastening tape intermediate of
A plurality of the fastening tapes are obtained by separating between the valley portions of the side edges formed in the S-curve shape and the side edges formed in a straight line in each of the obtained fastening tape intermediates. The manufacturing method of the fastening tape as described in any one of Claims 7-9. An absorber, a top sheet that is disposed so as to cover the upper surface of the absorber, and at least partly made of a liquid permeable material, and a surface that is disposed so as to cover the lower surface of the absorber. And a back sheet
It consists of each part of the front body, the crotch and the back body,
A tape-type diaper that is arranged so as to extend from the left and right side edges of the back body, and further includes a fastening tape for fixing the front body and the back body,
The tape-type diaper whose said fastening tape is the fastening tape as described in any one of Claims 1-6.

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