JP2013198693A - Tape type diaper and method for manufacturing tape type diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape type diaper in which a fastening tape can be easily drawn out in use.SOLUTION: Provided is a tape type diaper 1 in which each fastening tape 11 has such a Z shape folding structure that front surfaces are folded so as to be abutted on each other by a first fold line 76, rear surfaces are folded so as to be abutted on each other by a second fold line 78, and the front surfaces are folded again so as to be abutted on each other by a third fold line 80, thereby the fastening tape 11is folded so as to form a first fold part 70, a second fold part 72, and a third fold part 74 successively from a distal end of a tape base material 50. In the folding structure, the first fold part 70 and the second fold part 72, the second fold part 72 and the third fold part 74, and the third fold part 74 and a diaper body 60 are each latched and in the tape type diaper 1, the folding structure is kept.

Description

  The present invention relates to a tape-type diaper and a method for producing a tape-type diaper. More specifically, the present invention relates to a structure of a fastening tape portion of a tape-type diaper and an attachment structure to a diaper main body.

  The tape-type diaper is a disposable diaper having at least a pair of fastening tapes on the left and right edges of the part (rear enveloping part) that encloses the rear part around the waist of the wearer in the diaper main body where the absorbent body is disposed. It is. The fastening tape is formed from a tape base material and a hook material attached to the tip of the tape base material.

  In the manufacturing process of tape-type diapers as described above, accidents such as the production equipment stopping or the production equipment or products being damaged due to the fastening tapes protruding from both side edges of the diaper body being caught on the production equipment etc. Need to prevent.

  Therefore, for example, as shown in FIG. 2, a method for manufacturing a tape-type diaper is proposed in which the fastening tape 211 is temporarily peelably secured in a state where the fastening tape 211 is folded inward from the side edge 206 a of the diaper main body 260. (Patent Documents 1 and 2).

  In the manufacturing method shown in FIG. 2, first, the width direction central portion A <b> 1 on the surface of the long tape base material 300 is narrower than the long tape base material 300 along the longitudinal direction of the long tape base material 300. A long hook material 302 is attached and cut by a periodic corrugated cutting line 306 that alternately passes through the long hook material attached region and the long hook material non-attached region (FIG. 2A). .

  Next, it is folded back so that the hook material attachment region is inside, and in the folded state, it is temporarily fixed so as to be peeled off (first temporary fixing portion 282). Further, an adhesive coating portion 316 for forming the second temporary fixing portion 284 is formed in advance on the back side of the hook material 248 (FIG. 2B).

  Then, the long tape base material 300 is cut | disconnected and the fastening tape 211 is cut out one by one (FIG.2 (c) figure). Furthermore, the fastening tape 211 is joined and fixed to the side edge part of the diaper main body 260 (FIG. 2D). Finally, the fastening tape 211 is folded back inward from the side edge 206a of the diaper main body 260, and the fastening tape 211 and the diaper main body 260 are temporarily fixed by the second temporary fixing portion 284 so as to be peelable (FIG. 2 (e)). .

Japanese Patent Laying-Open No. 2005-312707 JP 2008-161300 A

  However, the tape-type diaper obtained by the manufacturing method described in Patent Document 1 or 2 is difficult to visually recognize because the leading end of the fastening tape is folded downward when the fastening tape is pulled out. There was a hassle to look for the tip. In addition, it is difficult to directly pick the tip of the fastening tape 11. Furthermore, when pulling out the fastening tape, it is necessary to unfold the folded portion twice, and there is still room for improvement in terms of ease of pulling out the fastening tape when using the tape-type diaper.

  The present invention has been made in view of the problems of the prior art as described above. That is, the present invention provides a tape type diaper in which the fastening tape can be easily pulled out during use and a method for producing a tape type diaper that can easily produce the tape type diaper of the present invention.

  As a result of intensive studies to solve the problems of the prior art as described above, the inventor has devised the folding structure of the fastening tape and the temporary fixing method for holding the folded structure, thereby The present invention has been completed with the idea that the problem will be solved. Specifically, according to the present invention, the following tape-type diaper and tape-diaper manufacturing method are provided.

[1] A crotch wrapping part, which is a part for wrapping the crotch of a wearer, in which an absorber for absorbing and holding excrement is arranged, and is arranged to be continuous in front of the crotch wrapping part A front enveloping part which is a part encapsulating the wearer's torso front part, and a part enclosing the wearer's torso rear part which is arranged so as to be continuous behind the crotch enveloping part A diaper main body formed from each part of a certain rear enveloping part, a tape base material, and a hook material attached to the tip part of the tape base material, both side edges of the rear enveloping part in the diaper main body At least a pair of fastening tapes arranged on the left and right sides, and the fastening tape is folded so that the surfaces are in contact with each other by a first folding line located on the tip side of the tape base material, 2nd return located on the end side of the tape base material from the 1st return line Is folded back so that the back surfaces are in contact with each other, and is folded back again so that the front surfaces are in contact with each other by a third folding line positioned further to the end side of the tape base material than the second folding line. From the front end of the material to the first return line, the second return part from the first return line to the second return line, from the second return line to the third return line A Z-folded structure that is folded so that the third folded part is formed in order, and the folded structure includes the first folded part, the second folded part, and the second folded part. A tape-type diaper in which the folded portion and the third folded portion, and the third folded portion and the diaper main body are temporarily fixed so as to be peelable, and the folded state is maintained.

[2] The tape-type diaper according to [1], wherein the folding structure is formed by folding the fastening tape such that a tip of the first folded portion protrudes from the second folded line.

[3] The method for producing a tape-type diaper according to [1], wherein the long sized diaper is formed so as to be along a longitudinal direction of the long tape base material at a central portion in a width direction on a surface of the long tape base material. A first intermediate body provided with a long hook material that is narrower than the tape base material is prepared, and the first intermediate body is divided into a long hook material installation region at the center in the width direction and the lengths of both side edges in the width direction. It has a corrugated edge and a straight edge by cutting with a periodic corrugated cutting line that alternately passes through the area where the shank hook material is not provided, and the hook material is provided in the corrugated edge side area. The second intermediate body is folded so that the surfaces are in contact with each other by a first folding line located on the straight edge side from the hook material attachment region, and the corrugated edge Forming a first turn-up section from the first turn-up line to the first turn-up line, the first turn-up section and the first turn-up line. A third intermediate body having a first temporary fixing portion is obtained by temporarily fixing the linear edge side portion in a peelable manner, and the third intermediate body is positioned closer to the linear edge side than the first folding line. The second folded line is folded back so that the back surfaces are in contact with each other to form a second folded part from the first folded line to the second folded line, and the second folded part and the second folded line The fourth intermediate body in which a second temporary fixing portion is formed is obtained by temporarily fixing the portion on the straight edge side so as to be peelable, and the fourth intermediate body is orthogonal to the straight edge, and A plurality of fastening tapes are obtained by cutting along cutting lines that reach the troughs of the corrugated edge, and the fastening tape is temporarily separated from the second folding line so that the portion on the linear edge side and the diaper body can be peeled off. The third temporary fixing part is formed by stopping, and the third temporary fixing part is positioned on the linear edge side portion from the third temporary fixing part. The tape-type diaper is obtained by folding back so that the surfaces come into contact with each other by the third folding line, and joining and fixing the portion on the linear edge side from the third folding line to the diaper body. Method.

[4] The method for manufacturing a tape-type diaper according to [3], wherein a tip of the first folded portion is folded back so as to protrude from the second folded line to form the second folded portion.

  The tape-type diaper of the present invention is easy to pull out the fastening tape during use. Moreover, the manufacturing method of the tape type diaper of this invention can manufacture the tape type diaper of this invention easily.

It is an outline top view showing typically the state where the tape type diaper of the present invention was developed and it looked from the inner surface side. It is a schematic plan view which shows typically the state which looked at the tape type diaper shown to FIG. 1A from the outer surface side. 1B is a schematic end view schematically showing an A-A ′ cut end surface of the tape-type diaper shown in FIG. 1A. FIG. FIG. 1B is a schematic end view schematically showing a B-B ′ cut end surface of the tape-type diaper shown in FIG. 1A. It is a schematic plan view which shows typically the state which pulled out the fastening tape of the tape-type diaper shown to FIG. 1A. It is a schematic plan view which expands and shows the fastening tape part of the tape-type diaper shown to FIG. 1A. It is process drawing which shows the manufacturing method of the conventional tape type diaper typically. It is a schematic plan view which shows typically the 1st process of the manufacturing method of the tape-type diaper of this invention. It is a schematic plan view which shows typically the 2nd process of the manufacturing method of the tape-type diaper of this invention. It is a schematic plan view which shows typically the 3rd process of the manufacturing method of the tape-type diaper of this invention. It is a schematic plan view which shows typically the 4th process of the manufacturing method of the tape type diaper of this invention. It is a schematic plan view which shows typically the 5th process of the manufacturing method of the tape type diaper of this invention. It is a schematic plan view which shows typically the 6th process of the manufacturing method of the tape-type diaper of this invention. It is a schematic plan view which shows typically the 7th process of the manufacturing method of the tape type diaper of this invention. It is a schematic plan view which shows typically the 8th process of the manufacturing method of the tape type diaper of this invention. It is a schematic plan view which shows typically the 9th process of the manufacturing method of the tape type diaper of this invention. It is a schematic plan view which shows typically the 10th process of the manufacturing method of the tape type diaper of this invention.

  Hereinafter, the form for implementing the tape type diaper of this invention is demonstrated concretely, referring drawings. However, the present invention includes all tape-type diapers having the specific matters. That is, the present invention is not limited to the embodiments described below.

[1] Characteristic configuration of the tape-type diaper of the present invention:
The tape-type diaper of the present invention is characterized by the folding structure of the fastening tape. More specifically, as in the tape-type diaper 1 shown in FIGS. 1A to 1F, the first folded portion 70, the second folded portion 72, and the third folded portion from the distal end side to the distal end side of the fastening tape 11. It is characterized in that it has a Z-shaped folded structure in which 74 is folded so as to be sequentially formed.

  When having the folded structure, as shown in FIG. 1A, in a state where the tape-type diaper 1 is flatly developed, the leading end portion (first folded portion 70) of the fastening tape 11 is in the uppermost layer of the folded structure. Will be located. Therefore, there is no need to search for the tip of the fastening tape 11 and there is an advantage that the tip of the fastening tape 11 can be easily picked. Moreover, as shown in FIG. 1F, the fastening tape 11 can be developed by pulling the tip of the fastening tape 11. That is, since the fastening tape can be unfolded with a single action of picking and pulling the leading ends of the right and left fastening tapes, the fastening tape can be easily pulled out when the tape-type diaper is used.

[1-1] Folding structure of fastening tape:
In the tape-type diaper 1 shown in FIGS. 1C and 1F, the fastening tape 11 is folded back so that the surfaces thereof are in contact with each other by a first folding line 76 located on the front end side of the tape base material 50. A first folded portion 70 is formed from the tip of the material 50 to the first folded line 76.

  The “tip side of the tape base material” refers to a free end side that is not fixed to the diaper main body 60 among the ends of the tape base material 50. “Folding back so that the surfaces come into contact with each other” means folding back so as to be a valley fold when viewed from the front surface side of the fastening tape 11 and a mountain fold when viewed from the back surface side. The “surface” refers to the surface of the fastening tape 11 to which the hook material 48 is attached.

  In the tape-type diaper 1 shown in FIGS. 1C and 1F, the fastening tape 11 is folded so that the tip of the first folded portion 70 protrudes from the second folded line 78. Such a folding structure makes it easier to visually recognize the leading end of the fastening tape as compared with a structure in which the leading end of the first folding portion does not protrude from the second folding line. easy. Therefore, it becomes easier to pull out the fastening tape when using the tape-type diaper. In order to improve the visibility, it is also one of preferable modes to color the first folded portion 70, in particular, a portion protruding from the second folded line 78 in a color different from that of the second folded portion 72. For example, the second folded portion 72 may be uncolored (white), and the first folded portion 70, particularly the portion protruding from the second folded line 78 may be colored blue.

  In the tape-type diaper 1 shown in FIGS. 1C and 1F, a hook member 48 is attached to the first folded portion 70. A conventionally well-known thing can be used about a hook material. The specific structure of the hook material will be described later.

  Moreover, in the tape-type diaper 1 shown in FIG. 1C and FIG. 1F, the back surfaces of the fastening tape 11 are brought into contact with each other by a second return line 78 located on the end side of the tape base material 50 from the first return line 76. The second folded portion 72 from the first folded line 76 to the second folded line 78 is formed.

  The “terminal side of the tape base material” refers to a fixed end side fixed to the diaper main body 60 in the end portion of the tape base material 50. “Folding back so that the back surfaces come into contact with each other” means folding back so as to form a mountain fold when viewed from the front surface side of the fastening tape 11 and a valley fold when viewed from the back surface side. The “back surface” refers to the surface of the fastening tape 11 where the hook material 48 is not attached.

  Further, in the tape-type diaper 1 shown in FIG. 1C and FIG. 1F, the surfaces of the fastening tape 11 are again brought into contact with each other by the third return line 80 located on the end side of the tape base material 50 from the second return line 78. By being folded back so as to be in contact with each other, a third folded portion 74 from the second folded line 78 to the third folded line 80 is formed.

  As described above, the first folded portion 70, the second folded portion 72, and the third folded portion 74 are folded in order from the distal end side to the distal end side of the fastening tape 11, so that the Z-shaped A folded structure (Z-folded structure) can be formed.

[1-2] Temporary fastening structure of fastening tape:
In the tape-type diaper 1 shown in FIGS. 1C and 1F, the first folded portion 70 and the second folded portion 72, the second folded portion 72 and the third folded portion 74, and the third folded portion 74 of the fastening tape 11. The diaper main body 60 has a temporary fixing structure that is temporarily fixed so as to be peelable.

  “Temporarily fixable to peel” means that it is fixed to be peelable by the force of a human hand. The fixing method is not particularly limited, and for example, heat fusion (heat sealing), ultrasonic fusion, adhesion with an adhesive, or the like can be employed (for example, JP-A-10-24066 and JP-A-2002-159530). Issue gazette).

  The “temporarily fixed” is preferably fixed at a 180 ° peel strength within a range of 0.3 to 12.0 N / 25 mm. By setting the peeling force to 0.3 N / 25 mm or more, the temporary fixing part is difficult to peel off during the manufacture of the tape-type diaper. On the other hand, by setting the peeling force to 12.0 N / 25 mm or less, it is possible to peel the temporary fixing portion with the power of a human hand.

  The “peeling force” mentioned here means a value measured according to the method described in JIS Z0237. Specifically, it is the peel force measured under the conditions of 25 mm width, tensile speed 200 mm / min, and 180 ° peel.

  In the case of heat fusion, the peeling force can be adjusted by the heating temperature, the pressing force applied to the convex mold, the clearance between the convex mold and the concave mold, and the like. In the case of ultrasonic fusion, the frequency can be adjusted as appropriate depending on the frequency, amplification factor, clearance between the horn and the anvil, etc., and in the case of adhesion with an adhesive, depending on the type, coating amount, coating method, etc. .

  The kind of adhesive agent is not specifically limited, What is necessary is just to use the adhesive agent conventionally used for manufacture of an absorbent article. For example, an adhesive having high fluidity such as a hot melt adhesive can be preferably used.

  In the tape-type diaper 1 shown in FIGS. 1C and 1F, the first folded portion 70 and the second folded portion 72 of the fastening tape 11 are temporarily fixed by a first temporary fixing portion 82 so as to be peelable. As the first temporary fixing portion 82, one circular heat seal portion is formed. And the 1st temporary fix | stop part 82 is formed in the area | region (area | region of the 1st return line 76 vicinity) of the terminal side of the tape base material 50 from the hook material attachment area | region in the 1st return part 70. FIG. The first folded portion 70 is temporarily fixed to a region near the first folded line 76 in the second folded portion 72 by the first temporary fixing portion 82.

  However, as long as the 1st folding | returning part 70 and the 2nd folding | turning part 72 are temporarily fixed so that peeling is possible, the shape, formation position, number, etc. of the 1st temporary fixing part 82 are not limited to the form shown to FIG. 1F. For example, what formed the 1st temporary fix | stop part 82 in linear form, the thing formed by the adhesive agent coating part, the thing formed in multiple places, etc. are also contained in the scope of the present invention. Further, the first temporary fixing part 82 may be formed in a region on the tip side of the tape base material 50 from the hook material attaching region in the first folded portion 70. Further, the first temporary fixing portion 82 may be formed using the hook material 48 attached to the first folded portion 70. In other words, temporary engagement can be performed using the engaging force of the hook member 48. Such temporary fixing can be formed by a method of pressing the hook member 48 from the back surface side (tape base material 50 side) (see, for example, JP 2009-261823 A). However, in order to prevent the hook material 48 from being crushed and not functioning, it is preferable to form the first temporary fixing portion 82 in a region other than the hook material attaching region of the first folded portion 70.

  In the tape-type diaper 1 shown in FIGS. 1C and 1F, the second folded portion 72 and the third folded portion 74 of the fastening tape 11 are temporarily fixed by the second temporary fixing portion 84 so as to be peelable. As the second temporary fixing portion 84, two circular heat seal portions are formed. The second temporary fixing portion 84 is formed in a region near the first folding line 76 of the second folding portion 72. The second folded portion 72 is temporarily fixed to a region near the third folded line 80 in the third folded portion 74 by the second temporary fixing portion 84.

  As long as the 2nd folding | turning part 72 and the 3rd folding | turning part 74 are temporarily fixed so that peeling is possible, the point that the shape, formation position, number, etc. of the 2nd temporary fixing part 84 are not limited to the form shown in FIG. This is the same as the one temporary fixing portion 82.

  In the tape-type diaper 1 shown in FIGS. 1C and 1F, the third folded portion 74 and the diaper main body 60 of the fastening tape 11 are temporarily fixed by a third temporary fixing portion 86 so as to be peelable. As the 3rd temporary fix | stop part 86, the strip | belt-shaped adhesive agent coating part is formed in one place. And the 3rd temporary fix | stop part 86 is formed so that the middle of the 2nd return line 78 and the 3rd return line 80 of the 3rd return part 74 may be passed. The third folded portion 74 is temporarily fixed to the surface of the side sheet 19 in the diaper main body 60 by the third temporary fixing portion 86.

  As long as the 3rd folding | turning part 74 and the diaper main body 60 are temporarily fixed so that peeling is possible, the point which the shape, formation position, number, etc. of the 3rd temporary fixing part 86 is not limited to the form shown to FIG. This is the same as the stop portion 82 and the second temporary stop portion 84. Moreover, the part temporarily fixed to the diaper main body 60 is not limited to the surface of the side sheet 19, The surface of the three-dimensional gather 26, etc. may be sufficient.

  As described above, the first folded portion 70 and the second folded portion 72, the second folded portion 72 and the third folded portion 74, and the third folded portion 74 and the diaper body 60 of the fastening tape 11 can be peeled off. By temporarily fastening to, the folded state of the fastening tape 11 is maintained.

[2] Basic configuration of the tape-type diaper of the present invention:
The tape type diaper of this invention is equipped with the diaper main body 60 and the fastening tape 11 like the tape type diaper 1 shown to FIG. 1A-FIG. 1F.

[2-1] Diaper body:
As shown in FIGS. 1A and 1B, the diaper main body 60 of the tape-type diaper 1 is formed of each part of a crotch wrapping part 4, a front wrapping part 2, and a back wrapping part 6.

  The inseam enveloping part 4 is a part which encapsulates the wearer's inseam. The crotch enveloping part 4 is formed narrower than the front enveloping part 2 and the rear enveloping part 6 so as to fit the wearer's inseam shape, and the diaper main body 60 as a whole has an hourglass shape in which the central part in the front-rear direction is constricted. Presents.

  An absorber 22 for absorbing and holding excrement is disposed in the crotch enveloping portion 4. “Arranged” means that the absorbent body 22 is at least disposed in the crotch enveloping portion 4, and usually the front enveloping portion 2 and the rear covering as in the tape-type diaper 1 illustrated. It is also arranged on the packet part 6. A specific structure of the absorber 22 will be described later.

  The front enveloping part 2 is a part which encloses the front part of the wearer's waist and is arranged so as to be continuous in front of the crotch enveloping part 4. The back enveloping part 6 is a part which encloses the wearer's waist circumference rear part arrange | positioned so that the back of the crotch enveloping part 4 may be followed. The front enveloping part 2 and the rear enveloping part 6 are formed wider than the crotch enveloping part 4 in order to enclose the circumference of the wearer's torso.

  However, it is not limited to the form shown in FIG. 1A and FIG. For example, only the rear envelope portion 6 may be formed wider than the crotch envelope portion 4. In this case, a region that overlaps with the rear covering portion 6 when the waist end edge 2c and the waist end edge 6c are folded is defined as the front covering portion 2.

  A front patch 13 made of a loop material 46 of a mechanical fastener is provided near the waist edge 2c of the front envelope 2. On the other hand, at least a pair of fastening tapes 11 on the left and right sides are disposed on both side edges of the rear envelope 6. Therefore, by fastening the hook material 48 of the fastening tape 11 to the loop material 46 of the front patch 13, a cylindrical structure surrounding the wearer's torso can be formed.

  The diaper main body 60 has a laminated structure in which the top sheet 18, the absorber 22, the back sheet 20, and the like are laminated. Moreover, according to the objective, you may provide other structural members, such as a three-dimensional gather and various elastic materials.

[2-1A] Absorber:
The absorber 22 is a member for absorbing and holding excrement and is made of an absorbent material. Examples of the absorbent material include fluff pulp, super absorbent polymer (hereinafter referred to as “SAP”), a hydrophilic sheet, and the like. As the fluff pulp, wood pulp or non-wood pulp defibrated, etc., the SAP as sodium polyacrylate, the hydrophilic sheet as tissue, absorbent paper, hydrophilized treatment A nonwoven fabric or the like is used.

  As the absorbent body 22, it is preferable to use one or two or more absorbent materials formed into a mat shape. The mat may be a single layer or multiple layers. Especially, what combined 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be mixed in the fluff pulp mat, or may be used in the form of a layer between a plurality of fluff pulp mats.

  The absorbent body 22 shown in FIGS. 1C and 1D is encapsulated by an upper tissue 54 and a lower tissue 56 which are hydrophilic sheets. Such a form is preferable because SAP can be prevented from falling off and shape stability can be imparted. The entire absorbent body does not necessarily have to be encapsulated, as long as the upper surface, the bottom surface, and both side surfaces are encapsulated.

  The absorbent body 22 shown in FIGS. 1C and 1D uses an hourglass-shaped absorbent body 22 when viewed in plan from the top sheet 18 direction. However, you may use the absorber of other shapes, such as a rectangular shape, according to the objective.

[2-1B] Top sheet:
The top sheet 18 is a sheet arranged so as to cover the surface of the absorbent body 22 (the surface on the side facing the wearer's skin when the diaper is worn).

  The top sheet 18 is entirely composed of a hydrophilic nonwoven fabric that is a liquid-permeable material. However, as long as the wearer's urine etc. can permeate | transmit, the top sheet 18 whole does not need to be comprised with a liquid-permeable material. For example, only a portion overlapping the arrangement position of the absorbent body 22 of the crotch envelope portion 4 may be made of a liquid permeable material.

  The liquid permeable material is not limited to a hydrophilic nonwoven fabric, and can be appropriately selected from a woven fabric, a nonwoven fabric, a porous film, and the like. Especially, it is preferable to use the hydrophilic nonwoven fabric which performed the hydrophilic treatment to the nonwoven fabric which consists of thermoplastic resins, such as a polypropylene, polyethylene, polyester, aliphatic polyamide.

  As said nonwoven fabric, the nonwoven fabric manufactured by manufacturing methods, such as air through (card hot air) and card | curd embossing, can be used conveniently. The hydrophilic treatment can be performed by applying, spraying, impregnating, etc., a surfactant to the raw cotton of the nonwoven fabric.

[2-1C] Side sheet:
The side sheet 19 is a sheet that is disposed on both side edges in the width direction of the diaper and is disposed on a surface on the side facing the wearer's skin together with the top sheet 18 that is disposed in the center part in the width direction of the diaper. The side sheet 19 is made of a water-repellent nonwoven fabric. As the water-repellent nonwoven fabric, it is preferable to use a nonwoven fabric sheet obtained by a production method such as card embossing or spunbond, particularly a nonwoven fabric sheet such as SMS or SMMS having high waterproofness.

[2-1D] Backsheet:
The back sheet 20 is a sheet disposed so as to cover the back surface of the absorbent body 22 (the surface on the side facing away from the wearer's skin when the diaper is worn).

  The back sheet 20 is made of a microporous polyethylene film. This microporous polyethylene film is a film in which a large number of fine pores of 0.1 to several μm are formed, and is liquid-impermeable but moisture-permeable. Therefore, it is possible to prevent the diaper internal space from being steamed while ensuring leakage prevention. Further, the back sheet 20 is disposed so as to cover at least the position where the absorber 22 is disposed from the viewpoint of preventing urine leakage.

  However, as long as the leakage of urine can be prevented, the above configuration is not necessary. For example, instead of a microporous polyethylene film, a liquid-impermeable film made of a resin such as polyethylene may be used.

[2-1E] Cover sheet:
The cover sheet 24 is a sheet that is bonded to the outer surface side of the back sheet 20. The back sheet 20 is reinforced by the cover sheet 24, and the feel (tactile feeling) of the back sheet 20 is improved.

  The cover sheet 24 is composed of a nonwoven fabric sheet. However, the material is not limited as long as it has a reinforcing effect and a tactile sensation improving effect. For example, in addition to a dry nonwoven fabric and a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, and polyester, a woven fabric or the like may be used.

[2-1F] Solid gather:
The three-dimensional gather 26 is a leak-proof wall that is arranged on the skin contact surface of the diaper main body 60 and stands up three-dimensionally. It is used for the purpose of preventing a lateral excretion of excrement in combination with the leg elastic material by contacting the skin of the wearer. A solid gather 26 shown in FIGS. 1A, 1C, and 1E is composed of a water-repellent nonwoven fabric sheet 32, and has a structure in which a stretched three-dimensional gather elastic member 36 is sandwiched and fixed between layers of the nonwoven fabric sheet 32. is there.

  The material of the nonwoven fabric sheet is not limited to a water-repellent nonwoven fabric sheet as long as excrement can be prevented from leaking. For example, a liquid-impermeable film such as that used for the backsheet 20 may be used.

  In the three-dimensional gathers shown in FIGS. 1A, 1C, and 1E, both the three-dimensional gathers 26 and the side sheets 19 are constituted by the water-repellent nonwoven fabric sheet 32. However, the nonwoven fabric sheet may exclusively form a three-dimensional gather or may constitute both members other than the three-dimensional gather and the back sheet.

  A pair of three-dimensional gathers 26 are arranged on both sides of the absorber 22. However, two or more pairs of right and left solid gathers may be arranged.

[2-1G] Waist elastic material, leg elastic material:
In the diaper main body 60 shown in FIGS. 1A, 1B, and 1E, a waist stretchable material 42 is disposed in the vicinity of the waist edge 6c. The waist enveloping member 42 shrinks the back envelope 6 in the width direction of the diaper, improving the fit of the diaper and preventing leakage from the waist edge 2c, 6c.

  The waist elastic material 42 is disposed so as to be parallel to the waist edge 6 c of the rear envelope 6. Moreover, the waist elastic material 42 is formed with one sheet-like elastic material (urethane foam). The waist stretchable material 42 is sandwiched between the back sheet 20 and the cover sheet 24, and is fixed by a hot melt adhesive in a state where the stretch rate is 150%.

  However, the waist elastic material may be disposed on both the front enveloping part and the rear enveloping part along the waist edge, or may be formed of a linear elastic material such as rubber thread. Moreover, you may use not only an elastic foam like a urethane foam but an elastic net | network or an elastic film.

  In the diaper main body 60 shown in FIGS. 1A, 1B, and 1E, leg elastic members 40 are disposed along both side edges of the crotch envelope portion 4. The leg stretchable material 40 shrinks the crotch wrapping portion 4 in the front-rear direction of the diaper, improving the fit of the diaper and preventing side leakage from the side edges 4a and 4b of the crotch wrapping portion 4.

  The leg elastic member 40 is formed of a rubber thread made of an elastic thread of natural rubber. Further, as the leg elastic member 40, three rubber threads each on the left and right are arranged in a straight line along the front-rear direction of the diaper. And it is pinched | interposed between the layers of the side sheet | seat 19 and the cover sheet | seat 24, and is fixed with the hot-melt-adhesive in the state of 250% of expansion | extension rate.

  However, as the leg stretchable material 40, flat rubber or thread rubber made of an elastic thread of synthetic rubber (urethane rubber or the like) may be used, or the number of leg stretchable materials 40 may be increased or decreased as appropriate. Moreover, you may arrange | position curvedly according to the side edge shape of the crotch envelope part 4. FIG. The elongation rate may be increased or decreased in the range of 120 to 400%, and preferably 200 to 300%. As long as the fixing method is an adhesive having high fluidity, an adhesive other than the hot melt adhesive may be used, or fixing by heat fusion such as heat sealing or ultrasonic fusion may be used.

[2-2] Fastening tape:
The fastening tape 11 shown in FIGS. 1A to 1C is formed from a tape base material 50 and a hook material 48.

  The tape base material 50 is formed from a nonwoven fabric sheet. However, the material is not particularly limited, and may be a woven fabric, a plastic film, or the like.

  The hook material 48 is a convex member of a mechanical fastener (planar fastener). The hook material 48 is attached to the tip end portion of the tape base material 50, more specifically, to the first folded portion 70.

  The hook material 48 is bonded to the tape base material 50 by performing hot embossing in a state of being laminated on the tape base material (embossed portions 88 and 89). The embossed portions 88 in the distal end side region and the distal end side region are formed in a band shape that extends in the vertical direction of the drawing. The embossed portion 88 is formed in a diagonal stripe pattern. Further, the embossed portion 89 in the central region (the region between the front end side region and the end side region) is formed in a dotted dot pattern. However, the method of attaching the hook material is not limited to the above method. For example, adhesion by a hot melt adhesive may be used. Moreover, the pattern of the embossed part of the front end side region and the end side region may be a dot pattern.

  The fastening tape 11 is disposed on both side edges of the rear envelope 6 in the diaper body 60. The fastening tape 11 is fixed with a hot melt adhesive while being sandwiched between the side sheet 19 and the cover sheet 24. However, it may be fixed to the surface of the side sheet 19 or the outer surface of the cover sheet 24 as long as it is disposed on both side edges of the back envelope 6.

  Two pairs of left and right fastening tapes 11 are fixed to the diaper main body 60. However, the number of fastening tapes may be increased or decreased as appropriate. In the present invention, it is sufficient to provide at least a pair of left and right fastening tapes. In general, a pair of disposable diapers for infants (one each on the left and right) is attached, and a pair of disposable diapers for adults (two on the left and two on the left) are attached.

  Further, the fastening tape in the present invention includes a form in which two fastening tapes are continuous in the width direction of the tape and are integrally formed (double-running type). For example, a fixing tape or the like of a type in which two convex portions are formed at the tip of a wide tape base material and a hook material is attached to each of the convex portions (for example, Japanese Patent Application Laid-Open No. 2007-2007). No. -282893, see FIG. The double-type fastening tape may have a perforation formed at the center in the width direction and can be divided into two fastening tapes by separating the perforation. Good.

[3] Manufacturing method:
The manufacturing method of the tape type diaper of this invention is demonstrated.

  The tape-type diaper 1 shown to FIG. 1A-FIG. 1F can be manufactured by the process as shown, for example in FIG. 3A-FIG. 3J.

  First, the 1st intermediate body by which the long hook material narrower than the said long tape base material was attached to the center part of the width direction in the surface of a long tape base material along the longitudinal direction of a long tape base material. Prepare. In the method shown in FIG. 3A, a long hook material having a width narrower than that of the long tape base material 100 at the center A1 in the width direction on the surface of the long tape base material 100 along the longitudinal direction of the long tape base material 100. 102 is attached to obtain a first intermediate 104. However, a commercially available product having a similar structure may be used as the first intermediate. Next, a periodic corrugated cutting line 106 passing through the first intermediate body 104 alternately through the long hook material attachment region at the center in the width direction and the long hook material non-attachment region at both side edges in the width direction. Disconnect with. As a result, the second intermediate body 112 having the corrugated edge 108 and the straight edge 110 and having the hook member 48 attached to the region on the corrugated edge 108 side is obtained.

  FIG. 3B is a view of the second intermediate body 112 shown in FIG. 3A as viewed from the surface side. As shown in FIGS. 3B and 3C, the second intermediate body 112 is folded back so that the surfaces are in contact with each other by a first folding line 76 positioned on the straight edge 110 side from the region where the hook member 48 is attached. A first folded portion 70 is formed from the edge 108 to the first folded line 76.

  And the 3rd intermediate body 114 in which the 1st temporary fixing | fixed part 82 was formed is obtained by temporarily fixing the part by the side of the linear edge 110 from the 1st folding | turning part 70 and the 1st folding line 76 so that peeling is possible. In the method shown in FIG. 3B, an adhesive coating portion 116 that later becomes the first temporary fixing portion 82 is formed in a portion closer to the straight edge 110 than the first folding line 76. However, the temporary fixing method is not limited to adhesion, and may be heat fusion such as heat sealing, ultrasonic fusion, or the like.

  Next, as shown in FIG. 3C and FIG. 3D, the third intermediate body 114 is folded back so that the back surfaces thereof are in contact with each other by the second folding line 78 located on the straight edge 110 side from the first folding line 76. A second folded portion 72 is formed from the first folded line 76 to the second folded line 78.

  Further, as shown in FIG. 3E, a fourth intermediate portion in which the second temporary fixing portion 84 is formed by temporarily fixing the second folding portion 72 and the second folding line 78 on the straight edge 110 side so as to be peelable. A body 118 is obtained. In the method shown in FIG. 3E, a circular heat seal portion formed in the vicinity of the first return line 76 is used as the second temporary fixing portion 84. Further, in the method shown in FIG. 3E, when temporarily fixing the portion on the straight edge 110 side from the second folding portion 72 and the second folding line 78, the first folding portion 70 and the second folding portion 72 are also provisionally attached. It has stopped (temporary fixing part 85). Thereby, the temporary fixing by the 1st temporary fixing part 82 is reinforced. However, temporary fixing of the first folding part 70 and the second folding part 72 in this step is not essential.

  FIG. 3F is a view of the fourth intermediate body 118 shown in FIG. 3E as seen from the back side. In the method shown in FIG. 3F, an adhesive coating portion 120 that later becomes the third temporary fixing portion 86 is formed on a portion of the fourth intermediate body 118 on the straight end edge 110 side from the second folding line 78 on the back surface side. Yes.

  Next, as shown in FIG. 3F and FIG. 3G, the fourth intermediate body 118 is separated by a cutting line 122 that is orthogonal to the straight edge 110 and reaches the valley of the corrugated edge 108, thereby Tape 11 is obtained.

  Further, as shown in FIG. 3H, the fastening tape 11 is temporarily secured so that the diaper main body 60 can be peeled off from the second folding line 78 on the straight edge 110 side, thereby forming a third temporary fastening portion (not shown). To do. Then, as shown in FIGS. 3H and 3I, the third folding line is folded back so that the back surfaces are in contact with each other by a third folding line 80 located on the straight edge 110 side portion from a third temporary fixing portion (not shown). A portion on the straight edge 110 side from 80 is joined and fixed to the diaper main body 60 to obtain a tape-type diaper.

  In the method shown in FIGS. 3I and 3J, the portion on the straight edge 110 side from the third return line 80 is fixed so as to be sandwiched between the layers of the side sheet 19 and the cover sheet 24 in the diaper main body 60. However, it can be fixed to the outer surface side of the cover sheet 24.

  The tape-type diaper of the present invention can be used as a disposable diaper for infants or for adults such as elderly people and persons with disabilities who need care.

1: Tape type diaper, 2: Front enveloping part, 2c: Waist edge, 4: Inseam enveloping part, 4a, 4b: Side edge, 6: Rear enveloping part, 6c: Waist edge, 11: Fastening Tape: 13: Front patch, 18: Top sheet, 19: Side sheet, 20: Back sheet, 22: Absorbent body, 24: Cover sheet, 26: Solid gather, 32: Non-woven sheet, 36: Solid gather stretchable material, 40 : Leg elastic material, 42: Waist elastic material, 46: Loop material, 48: Hook material, 50: Tape base material, 54: Upper tissue, 56: Lower tissue, 60: Diaper body, 70: First folding part, 72 : Second folding part, 74: third folding part, 76: first folding line, 78: second folding line, 80: third folding line, 82: first temporary fastening part, 84: second temporary fastening part, 85: Temporary fixing part, 86: Third temporary fixing part, 88, 89: Embossed part 100: long tape base material, 102: long hook material, 104: first intermediate, 106: cutting line, 108: corrugated edge, 110: straight edge, 112: second intermediate, 114: first 3 intermediate body, 116: adhesive application section, 118: fourth intermediate body, 120: adhesive application section, 122: cutting line, 206a: side edge, 211: fastening tape, 248: hook material, 260: Diaper main body, 282: first temporary fixing part, 284: second temporary fixing part, 300: long tape base material, 302: long hook material, 306: cutting line, 316: adhesive coating part, A1: width Central part of direction.

Claims (4)

The crotch wrapping part, which is a part that wraps the crotch of the wearer, in which an absorber for absorbing and holding excrement is disposed, and the wearer disposed to be continuous in front of the crotch wrapping part A front enveloping part that encloses the front part of the torso, and a rear covering that is a part enclosing the rear part of the wearer's torso, arranged continuously behind the crotch enveloping part A diaper body formed from each part of the packet part;
A tape base material, and formed from a hook material attached to the front end of the tape base material, and disposed at both side edges of the rear envelope portion in the diaper main body, and at least a pair of fastening tapes on the left and right sides; With
The fastening tape is folded back so that the surfaces are in contact with each other by a first folding line located on the front end side of the tape base material, and a second folding is located on the terminal side of the tape base material from the first folding line. The tape is folded back so that the back surfaces are in contact with each other, and is folded back again so that the surfaces are in contact with each other by a third folding line located further to the end of the tape base than the second folding line. The 1st return part from the tip of a substrate to the 1st return line, the 2nd return part from the 1st return line to the 2nd return line, the 3rd return line from the 2nd return line Has a Z-shaped folding structure that is folded so that the third folded portion up to is sequentially formed,
In the folding structure, the first folded portion and the second folded portion, the second folded portion and the third folded portion, and the third folded portion and the diaper main body are temporarily fixed to be peelable. A tape-type diaper whose folded state is maintained.   2. The tape-type diaper according to claim 1, wherein the folding structure is formed by folding the fastening tape such that a tip of the first folded portion protrudes from the second folded line. It is a manufacturing method of the tape type diaper according to claim 1,
A first intermediate in which a long hook material narrower than the long tape base material is attached to a central portion in the width direction on the surface of the long tape base material so as to follow the longitudinal direction of the long tape base material. Prepare
The first intermediate body is cut by a periodic corrugated cutting line that alternately passes through a long hook material attachment region at the center in the width direction and a long hook material non-attachment region at both side edges in the width direction. Thus, a second intermediate body having a corrugated edge and a straight edge and having a hook material attached to the corrugated edge side region is obtained.
The second intermediate body is folded so that the surfaces come into contact with each other by a first folding line located on the straight edge side from the hook material attachment region, and the second intermediate body extends from the corrugated edge to the first folding line. Forming a first folded portion, and obtaining a third intermediate in which the first temporary fixed portion is formed by temporarily fixing the first folded portion and the first folded line so that the portion on the linear edge side can be peeled off,
The third intermediate body is folded so that the back surfaces thereof are in contact with each other by a second folding line located on the linear end side from the first folding line, and from the first folding line to the second folding line. A second intermediate part in which a second temporary fixing part is formed is obtained by forming a second folding part and temporarily fixing the second folding part and the part on the linear edge side from the second folding line so as to be peelable. ,
The fourth intermediate is cut at a cutting line that is orthogonal to the straight edge and reaches the trough of the corrugated edge to obtain a plurality of fastening tapes,
A third temporary fixing part is formed by temporarily fixing the fastening tape so that the portion on the linear edge side from the second folding line and the diaper main body can be peeled off, and the linear end from the third temporary fixing part. Folded so that the surfaces are in contact with each other by a third folding line located at the edge side part, and joined and fixed the straight edge side part from the third folding line to the diaper main body to obtain the tape-type diaper. Tape diaper manufacturing method.   The manufacturing method of the tape-type diaper according to claim 3, wherein the tip of the first folded portion is folded back so as to protrude from the second folded line, thereby forming the second folded portion.

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