JP2013192740A - Manufacturing method of disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique of reducing loss of an adhesive generated in a manufacturing process of a disposable diaper.SOLUTION: An adhesive 60 is independently discharged from a plurality of discharge parts 431, 432 and 433 to an outer layer nonwoven fabric bulk sample 50 conveyed in a conveyance direction R1 and the adhesive 60 is applied. At the time, out of an opening forming area 5R where an opening is formed, to three partial areas 51R, 52R and 53R divided by two straight lines L1 and L2 passing through the inner side of the opening forming area 5R, the adhesive 60 is discharged from the discharge parts 431, 432 and 433 corresponding to each of them. Also, out of the three partial areas 51R, 52R and 53R, in the partial area 53R on the inner side, which is held between the two partial areas 51R and 52R on the outer side, an adhesive non-applied area 531 is formed by stopping discharge of the adhesive 60 from the discharge part 433.

Description

  The present invention relates to a method for manufacturing a disposable diaper, and more particularly to a technique for applying an adhesive for bonding between sheets.

  2. Description of the Related Art Conventionally, disposable diapers are composed of a laminate of a non-woven fabric outer layer sheet and a non-woven fabric inner layer sheet, and have a main body portion formed with leg-through openings serving as leg-through portions for passing legs. In such a disposable diaper manufacturing process, for example, an adhesive is applied to one of an outer layer sheet and an inner layer sheet extending in a band shape, and then superposed and bonded to form a sheet-like base material. And after an absorber etc. are attached to this sheet-like base material, the opening part used as a leg passage opening part is formed with a cutter, and also it isolate | separates into each disposable diaper (for example, patent document 1).

JP 2010-142500 A

  However, in the case of the conventional manufacturing method, since the adhesive is applied also to the portion cut out for forming the opening, loss of the adhesive occurs. Therefore, it is desired to apply the adhesive to the opening in a limited manner, but there are few known specific solutions.

  Then, an object of this invention is to provide the technique which reduces the loss of the adhesive agent generate | occur | produced in the manufacturing process of a disposable diaper.

  In order to solve the above problems, a first aspect is a method for manufacturing a disposable diaper, wherein (a) a step of transporting a first sheet in a predetermined transport direction, and (b) an adhesive from a plurality of discharge units And the step of applying the adhesive to the first sheet conveyed in the step (a), and (c) applying the adhesive in the step (b). Adhering a second sheet to the surface of the first sheet to form a sheet-like base material, and (d) cutting the sheet-like base material to form an opening, The step (b) corresponds to each of three or more partial regions divided by at least two or more straight lines passing through the inside of the opening formation region among the opening formation regions where the opening is formed. The adhesive is discharged from the discharge portion, and the most of the three or more partial regions In the step of forming an adhesive non-application region in one or more partial regions on the inside sandwiched between two partial regions on the side, by stopping the discharge of the adhesive from the discharge unit is there.

  In addition, the second aspect is the method for manufacturing a disposable diaper according to the first aspect, wherein the step (b) includes the two outermost partial areas out of the three or more partial areas. Is a step in which the adhesive is continuously discharged from the discharge portion corresponding to the above.

  Moreover, a 3rd aspect is a manufacturing method of the disposable diaper which concerns on the 1st or 2nd aspect, The said (b) step is a step in which the said adhesive agent is apply | coated to linear, spiral shape, or planar shape. .

  The fourth aspect is the method of manufacturing a disposable diaper according to any one of the first to third aspects, wherein the step (b) includes an area of the adhesive non-application area with respect to the opening forming area. The adhesive is applied so that the ratio does not exceed 90%.

  According to the manufacturing method of the disposable diaper which concerns on the 1st-4th aspect, the adhesive agent non-application area | region where an adhesive agent is not apply | coated is formed in an opening part formation area. For this reason, the amount of the adhesive applied to the opening forming region cut out as the opening can be reduced. Therefore, loss of the adhesive can be reduced.

  According to the manufacturing method of the disposable diaper which concerns on a 1st aspect, an adhesive agent is apply | coated entirely to the partial area | region which exists outside. For this reason, an adhesive agent can be reliably apply | coated in the part which overlaps with the partial area | region which exists outside among the peripheral parts of an opening part formation area. Therefore, the cutting at the peripheral portion can be performed satisfactorily.

  According to the method of manufacturing a disposable diaper according to the third aspect, an appropriate gap can be provided for adhesion between the first sheet and the second sheet by applying the adhesive in a linear or spiral shape. Therefore, good air permeability is ensured. Further, when the adhesive is applied in a planar shape, the first sheet and the second sheet can be uniformly bonded.

  According to the manufacturing method of the disposable diaper which concerns on a 4th aspect, an adhesive agent can be favorably apply | coated to the peripheral part vicinity.

It is a perspective view of the disposable diaper which concerns on 1st Embodiment. It is the top view which looked at the disposable diaper shown by FIG. 1 from the skin side in the expand | deployed state. It is sectional drawing of the disposable diaper in the III-III position shown by FIG. It is the figure which showed a mode that the disposable diaper was manufactured on a manufacturing apparatus. It is a schematic top view which shows a mode that the adhesive agent is apply | coated to the outer-layer nonwoven fabric continuous body. It is a schematic perspective view of the application part which discharges an adhesive agent. In 2nd Embodiment, it is a schematic top view which shows a mode that the adhesive agent is apply | coated to the outer-layer nonwoven fabric continuous body.

  Hereinafter, embodiments will be described in detail with reference to the drawings. However, the constituent elements described in this embodiment are merely examples, and are not intended to limit the scope of the present invention only to them. In addition, in FIG. 1 and the subsequent drawings, the dimensions and number of each part may be exaggerated or simplified as necessary for easy understanding.

<1. First Embodiment>
<1.1. Configuration of pants-type disposable diaper 1>
FIG. 1 is a perspective view of a disposable diaper 1 according to the first embodiment. FIG. 2 is a plan view of the disposable diaper 1 shown in FIG. 1 as viewed from the skin side in an unfolded state. FIG. 3 is a cross-sectional view of the disposable diaper 1 in the III-III position shown in FIG.

  As shown in FIG. 1, the pants-type disposable diaper 1 includes a front waistline region 6 applied to the wearer's abdominal surface, a back waistline region 7 applied to the back surface of the wearer, and a front waistline region 6. And a narrow crotch region 8 connecting the rear waist region 7. Hereinafter, the direction in which the front waistline region 6, the crotch region 8 and the back waistline region 7 are connected is referred to as “front-rear direction”, and the direction perpendicular to the front-rear direction and along the surface of the disposable diaper 1 is referred to as “width direction”. Called.

  The disposable diaper 1 includes a sheet-shaped exterior member 2 that extends over the front waistline region 6, the crotch region 8, and the back waistline region 7, and an absorption bonded to the skin side surface of the exterior member 2 in the vicinity of the crotch region 8. And a sex body 3. When the disposable diaper 1 is worn, the exterior member 2 covers the circumference of the wearer and the crotch. Moreover, the absorptive main body 3 is applied to a wearer's crotch part.

  The exterior member 2 includes an inner layer nonwoven fabric 21, an outer layer nonwoven fabric 22, and a plurality of elastic members 11, 12 a, 12 b interposed between the inner layer nonwoven fabric 21 and the outer layer nonwoven fabric 22. The inner layer nonwoven fabric 21 and the outer layer nonwoven fabric 22 both extend in the front-rear direction from the front waistline region 6 to the rear waistline region 7, and have a shape constricted in the width direction in the crotch region 8 located in the middle. . Moreover, the outer side surface of the inner layer nonwoven fabric 21 and the skin side surface of the outer layer nonwoven fabric 22 are joined by an adhesive. As the adhesive, a hot-melt adhesive such as polyolefin, rubber, or vinyl acetate can be used as the adhesive.

  The inner layer nonwoven fabric 21 and the outer layer nonwoven fabric 22 of the present embodiment are made of a water-repellent nonwoven fabric using, for example, hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, etc.). Instead of the inner layer nonwoven fabric 21 and the outer layer nonwoven fabric 22, a plastic film may be used.

  At the time of mounting, both side portions of the front waistline region 6 and both side portions of the back waistline region 7 are joined to each other. Specifically, in the vicinity of the left and right waists of the wearer, the side portions of the exterior member 2 are joined together by thermal welding or ultrasonic welding. As a result, the disposable diaper 1 is formed with one waistline opening 4 through which the wearer's torso is passed and two leg passage openings 5 through which the wearer's legs are passed.

  As shown in FIG. 1 or FIG. 2, end pressing sheets 18 are attached to the skin side surfaces of the front waistline region 6 and the back waistline region 7. The end pressing sheet 18 is bonded to the skin side surface of the inner layer nonwoven fabric 21 with an adhesive (not shown). The upper surfaces of both end portions in the longitudinal direction of the absorbent main body 3 are covered with the end pressing sheet 18. Further, both end portions of the outer layer nonwoven fabric 22 in the previous direction are folded back to the skin surface side and joined to the skin side surface of the end pressing sheet 18.

  The front waistline region 6 and the back waistline region 7 are provided with a plurality of elastic members 11 extending in the width direction. For the elastic member 11, for example, polyurethane rubber or natural rubber is used. The elastic member 11 is fixed between the inner layer nonwoven fabric 21 and the outer layer nonwoven fabric 22 with an adhesive (not shown).

  When the disposable diaper 1 is manufactured, the elastic member 11 is attached between the inner layer nonwoven fabric 21 and the outer layer nonwoven fabric 22 in a stretched state. For this reason, the elastic member 11 contracts the front waist region 6 and the back waist region 7 in the width direction. When the wearer wears the disposable diaper 1, the front waist region 6 and the back waist region 7 fit around the wearer's waist due to the contraction force of the elastic member 11.

  A plurality of elastic members 12a and 12b are provided in front of and behind the leg passage opening 5. The elastic members 12a and 12b are made of, for example, polyurethane rubber or natural rubber. The elastic member 12a is disposed along the front edge of the pair of leg passage openings 5, and is disposed between the pair of leg passage openings 5 so as to cross the crotch region 8 in the width direction. ing. Further, the elastic member 12b is disposed at the rear edge of the pair of leg passage openings 5, and is disposed so as to cross the crotch region 8 in the width direction between the pair of leg passage openings 5. Has been. The elastic members 12a and 12b are fixed between the inner layer nonwoven fabric 21 and the outer layer nonwoven fabric 22 with an adhesive (not shown).

  When the disposable diaper 1 is manufactured, the elastic members 12a and 12b are attached in an extended state. For this reason, the elastic members 12 a and 12 b contract the edge of the leg-passing opening 5. When the wearer wears the disposable diaper 1, the edge of the leg opening 5 fits around the wearer's leg due to the contraction force of the elastic members 12a, 12b.

  The absorptive main body 3 is a part that is applied to the crotch part of the wearer and absorbs urine excreted from the wearer. As shown in FIG. 3, the absorbent main body 3 includes a liquid-permeable top sheet 13 disposed on the skin side, a liquid-impermeable back sheet 16 disposed on the outside, and both sheets 13, 16. And an absorbent core 19 interposed therebetween. The urine excreted from the wearer of the disposable diaper 1 passes through the top sheet 13, but does not penetrate outside from the back sheet 16, and is absorbed and retained by the absorbent core 19 between the top sheet 13 and the back sheet 16. Is done.

  The top sheet 13 is made of, for example, a nonwoven fabric that is made liquid permeable by treating the surface of hydrophobic fibers (polypropylene, polyethylene, polyester, polyamide, nylon, or the like) with a surfactant. However, the material of the top sheet 13 is not limited to this. For example, the top sheet 13 may be made of a nonwoven fabric of hydrophilic fibers (cellulose, rayon, cotton, etc.).

  The absorbent core 19 is fixed between the top sheet 13 and the back sheet 16 with an adhesive (not shown). The absorbent core 19 according to the present embodiment includes a lump obtained by mixing a hydrophilic fiber such as pulverized pulp fiber or cellulose fiber and a granular superabsorbent polymer (SAP), a paper sheet such as tissue paper or a transparent paper. It is coated with a liquid nonwoven fabric sheet. However, the material and structure of the absorbent core 19 are not limited to this. For example, the absorbent core 19 may be formed by molding only a superabsorbent polymer into a sheet shape.

  Moreover, the absorptive main body 3 has a pair of side seat 14 for preventing the urine leakage to the side. The pair of side sheets 14 is made of a water-repellent nonwoven fabric such as hydrophobic fibers (polypropylene, polyethylene, etc.).

  The pair of side sheets 14 extend in the front-rear direction on both sides of the absorbent main body 3. As shown in FIG. 3, the pair of side sheets 14 includes a base end part 14 a joined to the top sheet 13 and a standing part 14 b that stands up with respect to the base end part 14 a. The base end portion 14a is joined to the skin side surface of the top sheet 13 with an adhesive (not shown). Only the both ends of the upright portion 14b in the front-rear direction are fixed in a lying manner by the end presser sheet 18.

  A plurality of three-dimensional gather elastic members 15 extending in the front-rear direction are provided on the standing portion 14b. For the three-dimensional gather elastic member 15, for example, polyurethane rubber or natural rubber is used. At the time of manufacturing the disposable diaper 1, the elastic member 15 for three-dimensional gathers is attached to the upright portion 14b of the side seat 14 in a state where the elastic member 15 is extended beyond the natural length. For this reason, the elastic member 15 for three-dimensional gathers contracts the standing part 14b of the side seat 14 in the front-rear direction.

  The absorbent main body 3 is bonded to the skin side surface of the inner layer nonwoven fabric 21 with an adhesive 20. As shown in FIG. 3, the adhesive 20 is distributed below the vicinity of the center of the absorbent main body 3 in the width direction.

<1.2. Manufacturing method of pants-type disposable diaper 1>
Next, the manufacturing method of the underpants type disposable diaper 1 is demonstrated.

  Drawing 4 is a figure showing typically signs that disposable diaper 1 is manufactured on a manufacturing device. However, in FIG. 4, the process of joining the outer layer nonwoven fabric 22 and the inner layer nonwoven fabric 21 through the adhesive 60 is mainly illustrated.

  The outer layer nonwoven fabric supply part 41 supplies the outer layer nonwoven fabric continuous body 50 wound, for example in roll shape (FIG. 4: step S11). The outer layer nonwoven fabric continuous body 50 is a belt-like sheet that becomes the outer layer nonwoven fabric 22 after cutting. The outer nonwoven fabric continuous body 50 is transported toward a pair of nip rollers 49 described later (FIG. 4: Step S12) while the transport direction is appropriately changed by rollers provided everywhere. The outer layer nonwoven fabric continuous body 50 is an example of a first sheet.

  On the conveyance path of the outer layer nonwoven fabric continuous body 50, an application part 43 for applying the adhesive 60 is disposed. The application unit 43 discharges an adhesive supplied from an unillustrated adhesive supply source from a plurality of discharge ports provided at the lower end, and the inner surface of the outer layer nonwoven fabric continuous body 50 (a surface facing the inner layer nonwoven fabric 21). The adhesive 60 is applied to the substrate (FIG. 4: Step S13). The application process of the adhesive 60 to the outer layer nonwoven fabric continuous body 50 in step S13 will be described in detail later.

  The inner layer nonwoven fabric supply part 45 supplies the inner layer nonwoven fabric continuous body 55 wound, for example in roll shape (FIG. 4: step S14). The inner layer nonwoven fabric continuous body 55 is a belt-like sheet that becomes the inner layer nonwoven fabric 21 after cutting. Moreover, the elastic member supply part 47 supplies the elastic member continuous body 57 (FIG. 4: step S15). The inner layer nonwoven fabric continuous body 55 is an example of a second sheet. The elastic member continuous body 57 is a series of elastic members that become the elastic members 12a and 12b disposed along the trunk periphery opening 4 after cutting. Although illustration is omitted, the elastic member continuum that becomes the elastic member 11 disposed along the trunk periphery opening 4 after cutting is also supplied in the same manner as the elastic member continuum 57.

  The outer layer nonwoven fabric continuous body 50, the inner layer nonwoven fabric continuous body 55, and the elastic member continuous body 57 coated with the adhesive 60 are joined by passing between a pair of opposing nip rolls to form an exterior member continuous body 59 ( FIG. 4: Step S16). The exterior member continuous body 59 is an example of a sheet-like base material.

  Although the exterior member continuous body 59 is not shown, the absorbent main body 3, the side sheet 14, the end pressing sheet 18, and the like are appropriately attached to the surface, and then conveyed to the cutting unit 61. The cutting part 61 is cut by the leg hole cutter, thereby forming an opening to be the leg passage opening 5 at a required position of the exterior member continuous body 59 (FIG. 4: step S17).

  FIG. 5 is a schematic top view showing a state in which the adhesive 60 is applied to the outer layer nonwoven fabric continuous body 50. As shown in FIG. 5, the application unit 43 is formed in a long shape along a direction orthogonal to the conveyance direction R <b> 1 of the outer layer nonwoven fabric continuous body 50, and includes three discharge units 431 and 431 that discharge the adhesive 60. It is divided into 432 and 433. In FIG. 5, the discharge portions 431, 432, and 433 are combined into one main body portion, but may be configured as separate bodies.

  The adhesive 60 is supplied to the discharge units 431, 432, and 433 independently of each other. For this reason, the discharge units 431, 432, and 433 are independently controlled to turn on and off the discharge of the adhesive 60. The discharge control of the adhesive 60 is performed based on, for example, a valve (electromagnetic valve or the like) attached to each pipe connecting the adhesive supply source and the discharge units 431, 432, and 433 based on a control signal from a control unit (not shown). ) Can be realized by opening and closing each.

  As shown in FIG. 5, the opening forming region 5R is parallel to the transport direction R1 and is divided into three regions (partial regions 51R and 52R) by two straight lines L1 and L2 passing through the inside of the opening forming region 5R. , 53R). The two straight lines L1 and L2 are set in the middle of the ejection units 431 and 433 and in the middle of the ejection units 432 and 433, respectively. The partial regions 51R, 52R, and 53R are located below the discharge units 431, 432, and 433, respectively. The partial areas 51R, 52R, and 53R are coated with the adhesive 60 discharged from the discharge portions 431, 432, and 433, respectively.

  FIG. 6 is a schematic perspective view of the application unit 43 that discharges the adhesive 60. FIG. 6A is a diagram illustrating a state in which the adhesive 60 is applied linearly to the outer layer nonwoven fabric continuous body 50. FIG. 6B is a diagram illustrating a state where the adhesive 60 is spirally applied to the outer layer nonwoven fabric continuous body 50. FIG. 6C is a diagram illustrating a state in which the adhesive 60 is applied to the outer layer nonwoven fabric continuous body 50 in a planar shape.

  When the adhesive 60 is applied linearly, the adhesive 60 is discharged from a plurality of discharge ports (not shown) formed below the application portion 43. At this time, air is supplied toward the discharged adhesive 60 from air supply ports provided before and after the plurality of discharge ports in the transport direction R1. As a result, as shown in FIG. 6A, the adhesive 60 falls linearly from each of the plurality of discharge ports, so that the adhesive 60 is discharged from the discharge portions 431, 432, and 433 in a curtain shape. The Rukoto. And if the adhesive agent 60 is discharged from the discharge parts 431,432,433, this adhesive agent 60 will adhere to the predetermined | prescribed position (attachment planned position 60L) on the outer-layer nonwoven fabric continuous body 50. FIG.

  Further, as shown in FIG. 6B, when the adhesive 60 is applied in a spiral shape, the adhesive 60 is formed from a plurality of discharge ports (not shown) formed below the discharge portions 431, 432, and 433. At this time, air is supplied toward the discharged adhesive 60 from a plurality of (for example, 3 to 6) air supply ports provided at equal intervals around each discharge port. Thereby, the falling adhesive 60 rotates at high speed while being stretched by the air supplied from each air supply unit, and adheres to the outer layer nonwoven fabric continuous body 50 while spirally rotating.

  In addition, as shown in FIG. 6C, when the adhesive 60 is applied in a planar shape, the adhesive 60 is discharged from the slit-shaped discharge ports formed below the discharge portions 431, 432, and 433. Is done. At this time, the slit-shaped discharge port is disposed at a position close to or in contact with the outer layer nonwoven fabric continuous body 50. Thereby, the adhesive agent 60 is surface-coated (solid coating) with respect to the outer-layer nonwoven fabric continuous body 50. FIG.

  By applying the adhesive 60 linearly or in a spiral shape, an appropriate gap can be formed in the adhesion between the outer nonwoven fabric continuous body 50 and the inner nonwoven fabric continuous body 55, so that good air permeability is ensured. Is done. In addition, when the adhesive 60 is applied in a planar shape, the outer layer nonwoven fabric continuous body 50 and the inner layer nonwoven fabric continuous body 55 can be bonded uniformly.

  Returning to FIG. 5, the discharge units 431 and 432 continuously discharge the adhesive as the outer layer nonwoven fabric continuous body 50 moves in the transport direction R <b> 1. On the other hand, the discharge unit 433 discharges the adhesive 60 intermittently. More specifically, the discharge unit 433 stops discharging the adhesive 60 while the opening forming region 5R passes the planned attachment position 60L of the discharge unit 433, and the opening forming region 5R is scheduled to attach the discharge unit 433. After passing through the position 60L, the discharge of the adhesive 60 is resumed. By intermittently discharging the adhesive 60 from the discharge part 433 in this manner, as shown in FIG. 5, in the partial region 53R, an area where the adhesive is not applied (hereinafter referred to as adhesive non-application) This will be referred to as a region 531).

  The portion of the opening forming region 5R in the outer layer nonwoven fabric continuous body 50 is cut as described above and then discarded as a cut piece. For this reason, the adhesive 60 applied to the opening forming region 5R is lost. In the present embodiment, the opening forming region 5R is divided into three along the transport direction R1 and the adhesive 60 is applied, and the adhesive 60 is applied to the inner portion of the three divided portions. By prohibiting, the loss of the adhesive 60 can be reduced.

  In the example shown in FIG. 5, the adhesive 60 is applied to a portion of the partial region 53 </ b> R excluding the adhesive non-application region 531 (parts on both sides of the adhesive non-application region 531). In addition, the adhesive 60 is applied to the partial areas 51R and 52R over the entire surface. For this reason, the adhesive 60 will be apply | coated to the part which is the application object of the adhesive 60 by the discharge parts 431,432,433 among the peripheral parts (boundary part) of the opening part formation area 5R. As described above, the adhesive 60 is sufficiently applied to the peripheral portion of the opening forming region 5R, so that the outer layer nonwoven fabric continuous body 50 and the inner layer nonwoven fabric continuous body 55 can be bonded relatively firmly at the peripheral portion. it can. For this reason, in the cutting part 61, the opening part formation region 5R can be favorably cut. Moreover, the adhesive 60 for fixing the elastic member 57 to the outer periphery of the opening forming region 5R is surely applied.

  It should be noted that there may be a portion where the adhesive 60 is not applied on the periphery of the opening forming region 5R. For example, the discharge control of the discharge unit 433 may be performed so that the adhesive 60 is not applied to the entire partial region 53R. That is, before the opening forming area 5R reaches the planned adhesion position 60L, the ejection of the adhesive 60 from the ejection unit 433 is temporarily stopped, and after the opening forming area 5R passes the planned adhesion position 60L, the ejection is performed. You may make it restart discharge of the adhesive agent 60 from the part 433. FIG. In this case, the adhesive 60 is not applied to the peripheral portion of the opening forming region 5R that overlaps the peripheral portion of the inner partial region 53R, but the amount of adhesive 60 used can be further suppressed. Therefore, the loss of the adhesive 60 can be further reduced.

  The width D1 of the two straight lines L1 and L2 passing through the opening forming region 5R can be arbitrarily changed. For example, when the width D1 of the two straight lines L1 and L2 is enlarged, the width of the adhesive non-application region 531 can be increased in the direction orthogonal to the transport direction R1. Here, the loss of the adhesive 60 can be further reduced by optimizing the width D1 of the two straight lines L1 and L2 in accordance with the shape of the opening forming region 5R.

<2. Second Embodiment>
In the first embodiment, the opening forming region 5R is divided into three partial regions 51R, 52R, and 53R, and the adhesive 60 is applied to the inner partial region sandwiched between the two partial regions on the outer side. By prohibiting, the adhesive non-application area 531 is formed. However, it is also conceivable to apply the adhesive 60 by dividing the opening forming region 5R more finely.

  FIG. 7 is a schematic top view showing a state in which the adhesive 60 is applied to the outer layer nonwoven fabric continuous body 50 in the second embodiment. As shown in FIG. 7, in this embodiment, the opening forming region 5R is divided into four partial regions 51Ra, 52Ra, 53Ra, and 54Ra by three straight lines L1a, L2a, and L3a that are parallel to the transport direction R1. ing. And the application part 43a is equipped with discharge part 431a, 432a, 433a, 434a corresponding to each of partial area | region 51Ra, 52Ra, 53Ra, 54Ra, and discharges the adhesive agent 60 independently from these discharge parts. It is comprised so that it may apply.

  In the present embodiment, the adhesive 60 is continuously discharged from the discharge portions 431a and 432a corresponding to the partial regions 51Ra and 52Ra located outside of the four partial regions 51Ra, 52Ra, 53Ra, and 54Ra. For this reason, the adhesive 60 is applied to the entire areas 51Ra and 52Ra. On the other hand, the adhesive 60 is intermittently discharged from the discharge portions 433a and 434a. More specifically, each of the discharge portions 433a and 434a temporarily stops the discharge of the adhesive 60 after the opening forming area 5R reaches the respective adhesion planned position 60L, and the opening forming area 5R Before passing through the planned adhesion position 60L, the ejection of the adhesive 60 is resumed. Thereby, the adhesive non-application area 531 is formed across the partial areas 53Ra and 54Ra.

  Thus, by dividing the opening forming region 5R more finely and applying the adhesive 60 by a plurality of independent discharge portions, it becomes easy to match the adhesive non-application region 531 with the opening forming region 5R. . Therefore, the loss of the adhesive 60 can be further reduced.

  In addition, when the area ratio of the adhesive non-application area | region 531 with respect to the opening part formation area 5R is less than 20%, the loss of the adhesive agent 60 becomes remarkable. For this reason, it is desirable to apply the adhesive 60 so that the area ratio is 20% or more. Further, in the cutting portion 61, the above-mentioned area is used in order to cut the opening forming region 5R satisfactorily or to reliably apply the adhesive 60 for fixing the elastic member 57 to the outer periphery of the opening forming region 5R. It is desirable that the adhesive 60 is applied to the peripheral portion without excess or deficiency so that the ratio does not exceed 90%. Specifically, it is desirable that the adhesive 60 is applied from the edge of the opening forming region 5R to a portion extending inward by a predetermined amount (for example, about 15 mm).

<3. Modification>
Although the embodiment has been described above, the present invention is not limited to the above, and various modifications are possible.

  For example, in the above embodiment, the adhesive 60 is applied to the outer nonwoven fabric continuous body 50, but it is also conceivable that the adhesive 60 is applied to the inner nonwoven fabric continuous body 55.

  In the above embodiment, the opening forming region 5R corresponds to the leg opening 5. However, the opening forming region 5R may correspond to an opening provided for other purposes.

  Moreover, the underpants type disposable diaper 1 demonstrated by the said embodiment may be not only for adults but for infants. The pants-type disposable diaper 1 may absorb not only urine but also other excrement (body fluid) such as loose stool.

  Furthermore, each structure demonstrated by said each embodiment and each modification can be suitably combined unless it mutually contradicts.

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 11, 12a, 12b Elastic member 2 Exterior member 21 Inner layer nonwoven fabric 22 Outer layer nonwoven fabric 4 Opening part 41 Outer layer nonwoven fabric supply part 43 Application part 431, 432, 433 Discharge part 431a, 432a, 433a, 434a Discharge part 43a Application Part 45 Inner layer nonwoven fabric supply part 47 Elastic member supply part 49 Nip roller 5 Leg opening part 50 Outer layer nonwoven fabric continuous body 51R, 52R, 53R Partial area 51Ra, 52Ra, 53Ra, 54Ra Partial area 531 Adhesive non-application area 53Ra, 54Ra part Area 55 Inner-layer nonwoven fabric continuum 57 Elastic member continuum 59 Exterior member continuum 5R Opening formation area 60 Adhesive 60L Scheduled attachment position 61 Cutting part L1, L2 Straight line L1a, L2a, L3a Straight line R1 Transport direction

Claims (4)

A method for manufacturing disposable diapers,
(a) transporting the first sheet in a predetermined transport direction;
(b) discharging the adhesive independently from a plurality of discharge units, and applying the adhesive to the first sheet conveyed in the step (a);
(c) attaching a second sheet to the surface of the first sheet to which the adhesive has been applied in the step (b) to form a sheet-like substrate;
(d) cutting the sheet-like base material to form an opening;
Including
The step (b)
Adhering from the discharge part corresponding to each of three or more partial areas divided by at least two straight lines passing through the inside of the opening forming area among the opening forming areas where the opening is formed The agent is discharged,
The one or more partial areas located between the two outermost partial areas among the three or more partial areas are stopped by the discharge of the adhesive from the discharge unit being stopped. The manufacturing method of a disposable diaper which is a step in which a non-application area | region is formed. In the manufacturing method of the disposable diaper of Claim 1,
The step (b)
The manufacturing method of a disposable diaper which is a step in which the adhesive is continuously discharged from the discharge portion corresponding to each of the two partial regions located on the outermost side among the three or more partial regions. In the manufacturing method of the disposable diaper of Claim 1 or 2,
The step (b)
The manufacturing method of the disposable diaper which is the step which the said adhesive agent is apply | coated to linear, spiral shape, or planar shape. In the manufacturing method of the disposable diaper of any one of Claim 1 to 3,
The step (b)
A method for manufacturing a disposable diaper, which is a step in which the adhesive is applied so that an area ratio of the adhesive non-application region to the opening forming region does not exceed 90%.

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