JP4318708B2 - Absorbent article manufacturing method and adhesive coating apparatus - Google Patents

Description

The present invention relates to a coating apparatus of the pressure-sensitive adhesive in the manufacturing apparatus for carrying out the manufacturing method and the manufacturing method for absorbent products products such as sanitary napkins.

  Conventionally, a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the top sheet and the back sheet are provided, and clothes such as shorts are provided on the back sheet. There is used an absorbent article provided with a pressure-sensitive adhesive for fixing to an adhesive, and the pressure-sensitive adhesive is covered with a release sheet. Absorbent articles having such a configuration include sanitary napkins, light incontinence pads, and cage sheets.

The sanitary napkin will be described as an example. In the conventional sanitary napkin 1, as shown in FIGS. 11 (a) and 11 (b), the outer peripheral edge is formed in a curved shape, and an adhesive is provided. The adhesive region 18 has a rectangular shape in which the outer peripheral edge portion 18a is inwardly spaced from the outer peripheral edge portion 12a of the backsheet 12.
Further, the sanitary napkin 1 shown in FIG. 11 (b) has a pair of wing portions 17. Also in the wing portion 17, the adhesive region 19 provided with the adhesive has an outer peripheral edge portion. 19 a has a rectangular shape that is inwardly spaced from the outer peripheral edge portion 17 a of the wing portion 17.
In addition, illustration of a peeling sheet is abbreviate | omitted in FIG.

Here, the pressure-sensitive adhesive is not provided on the entire surface of the back sheet 12 because the pressure-sensitive adhesive is provided on the entire surface of the back sheet 12 and the pressure-sensitive adhesive is disposed on the outer peripheral edge (back sheet 12) of the sanitary napkin 1. The top sheet and the back sheet when exposed to the wearer's skin from the outer peripheral edge 12a) and when the sanitary napkin is cut to obtain individual sanitary napkins at the time of manufacture. This is because there is a problem that the cutting processability is deteriorated due to cutting with the adhesive.
Also, the reason why the adhesive region is rectangular is due to the coating performance of the adhesive coating device, as will be described later.

  However, in the sanitary napkin 1 in which the outer peripheral edge portion is formed in a curved shape and the pressure-sensitive adhesive area 18 is rectangular, the area where the pressure-sensitive adhesive is provided on the surface of the backsheet 12 is small. The space | interval of the outer periphery 12a and the outer periphery 18a of the adhesive area | region 18 is large. That is, the area | region where the adhesive is not provided in the surface of the back sheet 12 like the area | region enclosed with the dashed-two dotted line in FIG. 11 becomes large. Since the area where the adhesive is not provided is not fixed to clothes such as shorts when worn (during use), the conventional sanitary napkin 1 shown in FIG. 11 has low adhesion to the skin of the wearer, At this portion, the sanitary napkin is broken or twisted. In the worst case, this twist may cause the shape of the sanitary napkin that is originally fixed to the adhesive to collapse, and the sanitary napkin may not fully perform.

  On the other hand, as shown in FIG. 12, a conventional adhesive coating device used in an apparatus for manufacturing absorbent articles such as sanitary napkins provided with an adhesive is a curtain coater that discharges the adhesive in a curtain shape. 4 is provided. The block-shaped curtain coater main body 41 constituting the curtain coater 4 is provided with an adhesive supply pipe 43 extending downward from the upper end of the curtain coater main body 41, and an adhesive retention section communicating with the adhesive supply pipe 43. 45 is provided so as to extend in the lateral direction. Further, an adhesive discharge hole 44 that communicates from the adhesive staying portion 45 to the lower end portion of the curtain coater body 41 is constituted by a large number of thin tubes 44 a arranged linearly in the longitudinal direction of the adhesive staying portion 45. It has been. Above the curtain coater main body 41, an adhesive supply section (not shown) for supplying an adhesive to the adhesive staying section 45 via the adhesive supply pipe 43 is provided.

According to the conventional curtain coater 4 having such a configuration, when the pressure-sensitive adhesive is supplied from the pressure-sensitive adhesive supply unit to the pressure-sensitive adhesive supply pipe 43 while being pressurized, the pressure-sensitive adhesive is discharged via the pressure-sensitive adhesive staying unit 45 to the pressure-sensitive adhesive discharge hole. It is discharged in the form of a curtain from 44 thin tubes 44a. And if an adhesive is discharged from the adhesive discharge hole 44, conveying the release sheet in which the adhesive is not provided under the adhesive discharge hole 44 of the curtain coater 4, the adhesive is applied to the release sheet. can do.
Furthermore, a sanitary napkin provided with a pressure-sensitive adhesive can be obtained by attaching the release sheet coated with the pressure-sensitive adhesive to the back sheet via the pressure-sensitive adhesive.

However, according to the conventional pressure-sensitive adhesive coating apparatus having the curtain coater 4 having the configuration shown in FIG. 12, the width of the pressure-sensitive adhesive discharged from the pressure-sensitive adhesive discharge hole 44 is constant. Is coated in a rectangular shape. As a result, only a sanitary napkin having a rectangular adhesive region as shown in FIG. 11 can be obtained.
The above description is not limited to sanitary napkins, but also applies to other absorbent articles in which a pressure sensitive adhesive is provided on a back sheet such as a light incontinence pad or a cage sheet.

  Japanese Patent Laid-Open No. 6-237957 discloses an absorbent article manufacturing apparatus in which a hot-melt adhesive supply path in a curtain coater is provided with a mechanical valve for intermittently supplying hot-melt adhesive by rotation of a rotor. Is described. And also with this manufacturing apparatus of an absorptive article, adhesives can be applied in a rectangular shape.

  However, when the absorbent article manufacturing apparatus described in the above publication is used, the supply of the adhesive is mechanically interrupted by a mechanical valve, and therefore, the discharge of the adhesive cannot be performed smoothly. A simple coating shape cannot be obtained.

JP-A-6-237957

Accordingly, an object of the present invention, the adhesive does not contact the skin of the wearer, excellent adhesion to the wearer's skin, suitable for the production breakage or twisting of the absorbent product articles without occurrence of an absorbent article An object of the present invention is to provide a manufacturing method for a absorbent article and a pressure-sensitive adhesive coating device in a manufacturing apparatus used for carrying out the manufacturing method.

The present invention also includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the top sheet and the back sheet. A pressure-sensitive adhesive for fixing to clothes, etc. is provided, and the pressure-sensitive adhesive is covered with a release sheet, and the pressure-sensitive adhesive region provided with the pressure-sensitive adhesive has an outer peripheral edge portion outside the back sheet. It exists inwardly at a distance from the peripheral edge and is provided over the longitudinal direction of the absorbent body. The shape of the outer peripheral edge of each of the front and rear portions in the longitudinal direction of the adhesive region is the backsheet. In the manufacturing method of an absorbent article having a shape substantially similar to the shape of the outer peripheral edge of the adhesive, the adhesive is formed on the long release sheet in a shape corresponding to the adhesive region in the longitudinal direction. Adhesive coating with continuous space coating , Comprising a sheet merging step of merging the coated sheet conveying step for conveying the 該剥 release sheets coated of the pressure-sensitive adhesive, and a 該剥 release sheet conveyed by coating Engineering sheet conveying step and said backsheet, In the adhesive coating step, the curtain coater body having a hollow portion having a cylindrical inner peripheral surface, and a cylindrical outer peripheral surface substantially coinciding with the inner peripheral surface of the hollow portion, A rotor provided with one or a plurality of recesses capable of retaining the adhesive, and rotatably fitted in the cavity; an adhesive supply unit for supplying the adhesive to the recesses; A pressure-sensitive adhesive discharge hole for discharging the pressure-sensitive adhesive in the concave portion in a curtain shape, and the one or a plurality of the concave portions are each formed in a shape corresponding to the predetermined shape of the pressure-sensitive adhesive region; Communicating with each other at the front and back of the direction And using the coating apparatus of the pressure-sensitive adhesive having a curtain coater, which communicates with the adhesive coating step, the adhesive is supplied under pressure from the pressure-sensitive adhesive supplying section, its pressure-sensitive adhesive the Yes form from the adhesive discharge hole so as to eject onto the release sheet, and by ceasing the pressure of the pressure-sensitive adhesive in the pressure-sensitive adhesive supply unit intermittently while changing the width, the pressure-sensitive adhesive The present invention provides a method for manufacturing an absorbent article in which the discharge of the adhesive from the discharge hole is intermittently stopped.

  The present invention also relates to a pressure-sensitive adhesive coating apparatus in a manufacturing apparatus for carrying out the method for manufacturing an absorbent article, wherein the curtain coater main body has a hollow portion having a cylindrical inner peripheral surface, and the hollow portion. A cylindrical outer peripheral surface substantially coincident with the inner peripheral surface of the outer peripheral surface, and the outer peripheral surface is provided with one or a plurality of recessed portions capable of retaining the adhesive, and is rotatably inserted into the hollow portion. Provided with an adhesive supply part for supplying the adhesive to the recessed part at the upper part, and an adhesive discharge hole for discharging the adhesive in the recessed part downward in a curtain shape at the lower part. Provided is a curtain coater, wherein one or a plurality of the recessed portions are formed in a shape corresponding to the predetermined shape of the pressure-sensitive adhesive region, and communicate with each other at the front and rear portions in the longitudinal direction. The rotor is connected to the empty space. The pressure-sensitive adhesive is supplied from the pressure-sensitive adhesive supply portion to the recessed portion while being pressed in a state where the pressure is rotating, so that the pressure-sensitive adhesive is discharged from the pressure-sensitive adhesive discharge hole and below the pressure-sensitive adhesive discharge hole. On the release sheet that is transported, the adhesive is discharged so as to have the predetermined shape of the adhesive region, and the adhesive staying in the communicating portion is discharged from the adhesive discharge hole. The present invention provides a pressure-sensitive adhesive coating apparatus that intermittently stops pressurization of the pressure-sensitive adhesive so as not to be discharged onto the release sheet.

According to the manufacturing method for absorbent articles of the present invention, the adhesive does not contact the skin of the wearer, excellent adhesion to the wearer's skin, broken or twist of the absorbent article, such generated I吸 An absorptive article can be manufactured suitably. Moreover, according to the adhesive coating apparatus of this invention, an adhesive can be easily provided in the said absorbent article in a predetermined shape.

Hereinafter, the sanitary napkin of the 1st form manufactured by the manufacturing method of the absorbent article of this invention is demonstrated with reference to FIG.
Sanitary napkin (absorbent article) 1 of the present form state, as shown in FIG. 1, a liquid-permeable topsheet 11, a liquid impermeable backsheet 12 and the topsheet 11 and the backsheet 12 of It has a liquid-retaining absorbent 13 interposed therebetween, and the back sheet 12 is provided with an adhesive for fixing to clothes such as shorts, and the adhesive is covered with a release sheet (not shown) It is what has been . The pressure-sensitive adhesive region 18 provided with the pressure-sensitive adhesive has an outer peripheral edge portion 18a inwardly spaced from the outer peripheral edge portion 12a of the back sheet 12 and is provided over the longitudinal direction of the absorber 13. In addition, the shape of the outer peripheral edge portion 18a of each of the front portion and the rear portion in the longitudinal direction of the adhesive region 18 is substantially similar to the shape of the outer peripheral edge portion 12a of the backsheet 12. In addition, illustration of a peeling sheet is abbreviate | omitted in FIG.

It will be described in more detail sanitary napkin 1 of the first form state.
Liquid-permeable top sheet 11 used in the sanitary napkin 1 of the first form state, liquid impermeable backsheet 12 are both formed by a known material. As shown in FIG. 1, the top sheet 11 and the back sheet 12 swell in a smooth curved shape at the front part (right side in FIG. 1) and the rear part (left side in FIG. 1), and are centered in the longitudinal direction. The part has a concave shape with a smooth curve.
Further, the liquid retaining absorbent 13 interposed between the top sheet 11 and the back sheet 12 is formed of a known material. The absorber 13 has a longitudinal front edge (right side in FIG. 1) and a rear edge (left side in FIG. 1) swelled in a gentle curve, and both side edges along the longitudinal direction are linearly formed. It has a different shape.

As shown in FIG. 1, the adhesive region 18 provided with the adhesive has a predetermined shape that exists outside the outer peripheral edge portions 14 a and 15 a of the front portion 14 and the rear portion 15 in the longitudinal direction of the absorbent body 13. Furthermore, the outer peripheral edge portion 18a has a predetermined shape that exists inwardly of the outer peripheral edge portion 16a of the central portion 16 in the longitudinal direction of the absorbent body 13. Thus, the adhesive region 18 has a substantially similar shape (similar shape) whose outer peripheral edge portion 18a is slightly smaller than the outer peripheral edge portion of the absorbent article 1 (the outer peripheral edge portion 12a of the back sheet 12). .
The distance between the outer peripheral edge 12a of the back sheet 12 and the outer peripheral edge 18a of the adhesive region 18 is preferably 3 mm to 10 mm. The interval between the outer peripheral edge portion 16a of the central portion 16 of the absorbent body 13 and the outer peripheral edge portion 18a of the adhesive region 18 (maximum interval in the width direction of the absorbent article) is preferably 10 mm to 30 mm.

Here, the central portion 16 of the absorbent body 13 refers to a range of 50mm in the longitudinal direction around the forward edge central position of 100~150mm from portion 61 (see FIG. 1) of the absorbent article 1. Front portion 14 and rear portion 1 5 of the absorbent body 13 refers to a range, each divided by the central unit 16 in the absorber 13. The center position 61 substantially coincides with the position of the crotch in clothes such as shorts to which the absorbent article is fixed.
Various sheets can be used as the release sheet as long as it has releasability from the adhesive.

In the sanitary napkin 1 of the first form state thus configured, since the outer peripheral edge portion 18a of the pressure-sensitive adhesive region 18, and exist from the outer peripheral edge portion 12a of the backsheet 12 inwardly spaced The adhesive is not exposed from the outer peripheral edge of the sanitary napkin and does not adhere to the wearer's skin. In addition, the cutting processability does not deteriorate during manufacturing.
Furthermore, since the shape of the outer peripheral edge portion 18a of each of the front portion and the rear portion in the longitudinal direction of the adhesive region 18 is substantially similar to the shape of the outer peripheral edge portion 12a of the backsheet 12, The area | region where the adhesive is not provided is narrow, it is excellent in the adhesiveness to a wearer's skin, and the sanitary napkin 1 does not bend | fold or twist. Moreover, since the outer peripheral edge 18 of the adhesive region 18 is located inward of the outer peripheral edge 16a of the central portion 16 of the absorbent body 13, the adhesive is exposed from the crotch portion of the shorts and is worn by the wearer. Contact with the skin is also prevented.

Next, the sanitary napkin of the 2nd form manufactured by the manufacturing method of the absorbent article of this invention is demonstrated with reference to FIG.
Sanitary napkin 1 of the second shape state is one in which a pair of wing portions 17 are provided on both side edges of the way, schematic longitudinal center of the sanitary napkin shown in FIG. The position of the wing part 17 substantially coincides with the center position 61. Configuration other than the wing portion 17 is configured similarly to the sanitary napkin 1 of the first shape state, the same components are designated by the common reference numerals.
Wing portion 17 of the sanitary napkin 1 of the second shape state is a substantially trapezoidal shape in plan view, the upper base is arranged outward in the width direction of the sanitary napkin 1, the lower base of which the absorbent body It is provided so that it may join to the both-sides edge part along the longitudinal direction of the part 10 (refers to parts other than wing among sanitary napkins which have a wing part).

  An adhesive region 19 is provided on the back sheet 12 surface of the wing portion 17, and the adhesive region 19 has a substantially similar shape (similar shape) to the wing portion 17, and an outer peripheral edge portion 19 a thereof is a wing. It exists inward from the outer peripheral edge portion 17a of the portion 17 at a distance. The distance between the outer peripheral edge portion 17a of the wing portion 17 and the outer peripheral edge portion 19a of the adhesive region 19 is preferably 5 mm to 10 mm.

In such sanitary napkin 1 of the second form state which is configured, because the absorbent body 10 has the same construction as the sanitary napkin 1 of the first form state, the sanitary napkin 1 of the first form state The same effect can be obtained. Further, also in the wing portion 17, the outer peripheral edge portion 19 a of the adhesive region 19 has a substantially similar shape to the outer peripheral edge portion 17 a of the wing portion 17, and exists inward from the outer peripheral edge portion 17 a. Therefore, the adhesive in the adhesive region 19 does not adhere to the skin of the wearer, the cutting processability does not deteriorate, and the wing portion does not break or twist.

Then, with the first embodiment of apparatus for manufacturing absorbent articles to carry out the method of manufacturing an absorbent article of the present invention will be described with reference to FIGS. 3 to 7. The manufacturing apparatus of the absorbent article of the first form state (sanitary napkins), and the first embodiment is used in the coating apparatus of the pressure-sensitive adhesive of the present invention it will be also explained this.
Manufacturing apparatus 2 of the absorbent article of the first shape state, as shown in FIG. 3, the absorbent body 13 absorbing body supply unit 21 supplies the top sheet raw fabric roll in which the elongated topsheet 11A into a roll 11B, a back sheet roll 12B in which a long back sheet 12A is rolled.

  The long top sheet 11A led out from the top sheet roll 11B is rotated in the conveying direction in the horizontal direction by the rotating roll 26A and is conveyed rightward in FIG. The absorber 13 carried out from the absorber supply unit 21 is placed on a long top sheet 11A that is transported in the horizontal direction and is transported to the right in FIG. The long back sheet 12A led out from the back sheet roll 12B is turned in the transport direction in the horizontal direction by the turning roll 26B, and the absorbent body 13 is transported on the absorber 13 which is transported in the horizontal direction. In a contact state, the sheet is conveyed to the right in FIG.

  The long top sheet 11A and the long shape are disposed at the transport destination of the long top sheet 11A, the absorber 13 placed thereon, and the long back sheet 12A in contact therewith. The back sheet 12A is joined with the absorbent body 13 disposed therebetween, and an outer peripheral edge cutting part 22 is provided for cutting into a predetermined outer peripheral edge shape of the sanitary napkin. Such an absorbent article in which no adhesive is provided is hereinafter referred to as “absorbent article body 1 ′”.

Above the conveyance path through which the sanitary napkin is conveyed, a release sheet original roll S1B in which a long release sheet S1A is rolled, and release sheet conveyance rolls 23A to 23C for conveying the long release sheet S1A. The adhesive application device 3 ( in the first embodiment of the present invention ) provided above the long release sheet S1A being conveyed, and the adhesive B was applied by the application device 3 A release sheet cutting unit 24 that cuts the long release sheet S1A into a predetermined length, and a release sheet that sticks the release sheet S1 obtained by being cut onto the back sheet 12 via the adhesive B. An adhesive roll 25 is provided.
The sanitary napkin 1 to which the release sheet S1 coated with the pressure-sensitive adhesive is adhered is further transported and individually packaged in an individual packaging process (not shown).

The pressure-sensitive adhesive coating apparatus 3 according to the first embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 4 to 7, the pressure-sensitive adhesive coating apparatus 3 according to the first embodiment includes a curtain coater body 41 having a hollow portion 41 a having a cylindrical inner peripheral surface 41 b and the hollow portion 41 a. The outer peripheral surface 42a has a plurality of (two) recessed portions 42b in which the adhesive B can be retained, and has a cylindrical outer surface 42a substantially coinciding with the inner peripheral surface 41b. A curtain coater 4 having a rotor 42 inserted freely is provided . Curtain coater 4, the upper the recess adhesive supply unit 5 for supplying the pressure-sensitive adhesive B to 42b are provided to discharge the PSA B of the recessed portion 42b in its lower downwardly in a curtain-like adhesive the dosage discharge holes 44 that are provided.

  Moreover, in the adhesive coating device 3 of the first embodiment, a plurality (two) of the recessed portions 42b correspond to the predetermined shape of the adhesive region 18, respectively, as shown in FIG. It is formed in a shape, and is communicated with each other through the communicating portion 42c at the longitudinal front and rear portions. And while the said rotor 42 is rotating in the said cavity part 41a, supplying the said adhesive B from the said adhesive supply part 5 to the said recessed part 42b, pressurizing, and this adhesive B is From the pressure-sensitive adhesive discharge hole 44, the pressure-sensitive adhesive region 18 is discharged onto the release sheet S1A conveyed below the pressure-sensitive adhesive discharge hole 44 so as to have the predetermined shape, The pressure application of the pressure-sensitive adhesive B is intermittently stopped so that the pressure-sensitive adhesive B staying in the communication portion 42c is not discharged from the pressure-sensitive adhesive discharge hole 44 to the release sheet S1A.

The coating device 3 of the first embodiment will be described in further detail.
The curtain coater 4 coats the adhesive in a curtain shape, and has a block-shaped curtain coater body 41. The curtain coater 41 is formed with a hollow portion 41a having a cylindrical inner peripheral surface 41b so that its axis is arranged in the lateral direction.

A rotor 42 having a cylindrical outer peripheral surface 42a substantially coinciding with the inner peripheral surface 41b of the hollow portion 41a is rotatably fitted in the hollow portion 41 in the hollow portion 41a of the curtain coater body 41. The rotation of the rotor 42 is performed by a motor (not shown) provided separately.
A heating device (not shown) is provided inside the curtain coater body 41 and the rotor 42 so that the pressure-sensitive adhesive can be heated. Therefore, the pressure-sensitive adhesive is discharged in a molten state. .

The depth of the recessed portion 42b is preferably 0.01 mm to 0.3 mm, and more preferably 0.05 to 0.2 mm.
The space between the inner peripheral surface 41b of the hollow portion 41a of the curtain coater body 41 and the outer peripheral surface 42a of the rotor 42 is narrow as long as the rotation of the rotor 42 in the hollow portion 41a is not hindered. The recessed portion 42b and the communicating portion 42c can be retained and filled.

As shown in FIG. 4, an adhesive supply unit 5 that supplies the adhesive B to the recessed portion 42 b and the communication portion 42 c is provided above the curtain coater body 41. In the upper part of the curtain coater body 41, an adhesive supply hole 43 for supplying an adhesive from the adhesive supply part 5 to the recessed part 42b and the communication part 42c of the rotor 42 is formed.
And the adhesive supply part 5 can supply the adhesive B in a molten state to the recessed part 42b and the communication part 42c through the adhesive supply hole 43, pressurizing. Moreover, pressurization to the pressure-sensitive adhesive can be intermittently stopped by a predetermined control mechanism.

In the lower part of the curtain coater body 41, an adhesive discharge hole 44 for discharging the adhesive staying in the recessed portion 42b in a curtain shape is provided.
As shown in FIGS. 5 and 7, the adhesive discharge hole 44 includes a large number of thin tubes 44 a arranged linearly in the axial direction of the rotor 42. The narrow tube 44 is provided over a position corresponding to the maximum width of the recessed portion 42 b, and the upper hole of the narrow tube 44 a faces the recessed portion 42 b of the rotor 42.

In addition, when the rotor 42 rotates and is supplied from the adhesive supply part 5 to the recessed part 42b and the communication part 42c through the adhesive supply hole 43 while pressurizing the molten adhesive B, the recessed part 42b. In addition, the adhesive B stays and fills in the communication portion 42c, and the adhesive B is discharged from the adhesive discharge hole 44 by pressure propagation . Further, the adhesive B staying in the communication part 42 c is not discharged from the adhesive discharge hole 44 by controlling (intermittently stopping) the pressure applied to the adhesive B by the adhesive supply part 5. ing.

Next, the manufacturing apparatus 2 of the absorbent article of the first form state (including coating device 3 of the adhesive first embodiment), the process of the absorbent article of the first form state shown in FIG. 1 is manufactured Will be described. In addition, also described a preferred embodiment of the manufacturing method of an absorbent article of the present invention is implemented by using the manufacturing apparatus 2 of the absorbent article of the first form state.

Method of manufacturing an absorbent article of the present embodiment, the A manufacturing method for absorbent articles of the first shape state, as shown in FIGS. 3 and 4, the release sheet of the pressure-sensitive adhesive B elongated A pressure-sensitive adhesive coating step of continuously applying a space corresponding to the pressure-sensitive adhesive region 18 in a longitudinal direction on S1A, and a coating for conveying the release sheet S1 coated with the pressure-sensitive adhesive B A sheet joining step for joining the release sheet S1 and the back sheet 12 conveyed in the coated sheet conveying step and the coated sheet conveying step. The pressure-sensitive adhesive coating step supplies the pressure-sensitive adhesive B while applying pressure from the pressure-sensitive adhesive supply unit 5 and also changes the width of the pressure-sensitive adhesive B from the pressure-sensitive adhesive discharge hole 44 onto the release sheet S1. The discharge of the adhesive B from the adhesive discharge hole 44 is intermittently stopped by intermittently stopping the pressurization of the adhesive B in the adhesive supply section 5. It is supposed to be canceled.

As shown in FIG. 3 and FIG. 4, the manufacturing method of the absorbent article according to the present embodiment includes the long release sheet S <b> 1 </ b> A coated with the adhesive B before the sheet joining step. Cut between adjacent pressure-sensitive adhesives B having a shape corresponding to the pressure-sensitive adhesive region 18 . On the other hand, between the long back sheet 12A and the long top sheet 11A, the absorbent body 13 is continuously arranged with a space in the longitudinal direction, and the long back sheet 12A is disposed. And the long top sheet 11 </ b> A are joined, and these are cut between the adjacent absorbers 13.

The manufacturing method of the absorbent article of this embodiment is further demonstrated.
The long top sheet 11A led out from the top sheet roll 11B is turned in the conveying direction in the horizontal direction by the turning roll 26A and is conveyed to the right in FIG. The absorber 13 carried out from the absorber supply part 21 is mounted on the elongate top sheet 11A conveyed in a horizontal direction. Then, the long back sheet 12A derived from the back sheet roll 12B is rotated in the transport direction in the horizontal direction by the turning roll 26B, and the absorbent body 13 is transported in the horizontal direction. In the state of abutting 13, it is conveyed to the right in FIG. 3.

  The long top sheet 11A, the absorber 13 placed thereon, and the long back sheet 12A in contact with the long top sheet 11A are formed in the long top sheet 11A at the outer peripheral edge cutting section 22. The long backsheet 12A is joined with the absorbent body 13 disposed therebetween, and is cut into a predetermined outer peripheral edge shape of the sanitary napkin.

On the other hand, the elongated release sheet S1A derived from the release sheet original roll S1B is conveyed below the adhesive coating device 3 of the first embodiment by the release sheet conveyance rolls 23A and 23B.
Here, in the pressure-sensitive adhesive coating apparatus 3 of the first embodiment, the pressure of the molten pressure-sensitive adhesive B is increased from the pressure-sensitive adhesive supply section 5 through the pressure-sensitive adhesive supply hole 43 of the curtain coater body 41. The hollow portion 41a is supplied to the recessed portion 42b and the communicating portion 42c of the rotor 42 rotating inside. When the adhesive B is supplied in this manner, the adhesive B stays in the recessed portion 42b and the communication portion 42c and fills up.

  The pressure-sensitive adhesive B filled in the recessed portion 42b is discharged from the pressure-sensitive adhesive discharge hole 44 due to pressure propagation. Since the rotor 42 rotates during this time, the pressure-sensitive adhesive B is opposed to the pressure-sensitive adhesive discharge hole 44. The width of the portion 42b changes according to its shape. Therefore, the curtain-like pressure-sensitive adhesive B is discharged from the pressure-sensitive adhesive discharge hole 44 while changing its width. Then, following the shape of the recessed portion 42b, the adhesive B is applied in a predetermined shape of the adhesive region 18 on the release sheet original fabric S1A being conveyed.

  Here, the pressure application of the adhesive B is intermittently stopped in consideration of the pressure propagation time lag so that the adhesive part B staying in the communication part 42c of the rotor 42 is not discharged from the adhesive discharge hole 44. Is done. Therefore, as shown in FIG. 4, the adhesive B is applied on the long release sheet S <b> 1 </ b> A in an independent predetermined shape without being continuous.

The long release sheet S1A thus coated with the adhesive B is transported toward the release sheet cutting section 24 by the release sheet transport roll 23c, and the release sheet cutting section 24 allows the adhesive area 18 to be conveyed. Is cut between the adjacent adhesives B having a shape corresponding to. The release sheet S1 obtained by cutting in this way is stuck on the back sheet 12 of the absorbent article main body 1 ′ by the release sheet sticking roll 25 via the adhesive B. As a result, the first form the sanitary napkin 1 of the state is obtained, resulting the sanitary napkin 1 is conveyed further individual wrapping step (not shown), is individually wrapped.

In the state where the narrow portion of the recessed portion 42b is arranged in the upper hole portion of the adhesive discharge hole 44, the discharge pressure of the adhesive B to the adhesive discharge hole 44 is increased. In this case, the adhesive discharge hole 44 is composed of a large number of thin tubes 44a arranged linearly in the axial direction of the rotor 42. In this case as well, the adhesive B is disposed downward via the thin tubes 44a. The pressure-sensitive adhesive B is not easily expanded from a desired width defined by the width of the recessed portion 42b.

Next, suitable for the production of sanitary napkins of the second form state shown in FIG. 2 (a sanitary napkin having wing portions), a description of a second embodiment of the coating apparatus of the pressure-sensitive adhesive of the present invention.
Coating apparatus of the pressure-sensitive adhesive second embodiment, as shown in FIG. 8, on the outer circumferential surface 42a of the rotor ', corresponding to the adhesive area 19 of the wing portion 17 of the sanitary napkin of the second form state Three concave portions 42b ′ having a shape are provided in the circumferential direction and two in the width direction. The three recesses 42b 'in the circumferential direction are communicated with each other via a communication part 42c'. Except for the shapes of the recessed portion 42b ′ and the communicating portion 42c ′ of the rotor, the configuration is the same as that of the adhesive coating apparatus of the first embodiment shown in FIGS.

According to the adhesive coating apparatus of the second embodiment configured as described above, a shape corresponding to the adhesive region 19 of the wing part 17 on the release sheet S2 for the wing part as shown in FIG. The adhesive B can be applied to
The release sheet S2, which is coated the adhesive B as shown in FIG. 9, as shown in FIG. 10, with respect to the sanitary napkin of the second form state having a wing portion 17, the back sheet 12 faces the outer A pair of wings 17 folded so as to be attached to each other is attached to the back sheet 12 surface via an adhesive B.

A step of bonding the release sheet which is coated the adhesive on the wings with a coating apparatus of the pressure-sensitive adhesive of the second embodiment, in the manufacturing apparatus 2 of the absorbent article of the first shape state, absorbent By performing before or after the release sheet S1 is attached to the article, an absorbent article having the release sheet attached to the wing portion via an adhesive can be obtained.

Coating apparatus tacky Chakuzai of the present invention is not limited to the embodiments described above without departing from the spirit of the present invention, it can be appropriately changed. Moreover, the manufacturing method of the absorbent article of this invention is not restrict | limited to the embodiment mentioned above, Unless it deviates from the meaning of this invention, it can change suitably.

The absorbent article produced by the method for producing an absorbent article of the present invention includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid retention property interposed between the top sheet and the back sheet. comprising the absorber, an adhesive for fixing to the garment shorts such as the backsheet is provided, as long as the adhesive agent is coated with a release sheet, not limited to sanitary napkins A light incontinence pad may be used.
Coating apparatus to your information, the shape and the number of the concave portion provided in the rotor of the pressure-sensitive adhesive of the present invention can be appropriately changed according to the shape and number of the pressure-sensitive adhesive area to be obtained.
The release sheet may be separate from the packaging material, or may be a part or all of the packaging material.

  In one embodiment of the method for producing an absorbent article of the present invention, the top sheet, the back sheet and the absorbent body are joined and cut to form an absorbent article body, and then the adhesive is applied to the back sheet. In the method for producing an absorbent article of the present invention, the release sheet coated with the adhesive is pasted on the long back sheet, and then the back sheet is attached. You may join and cut | disconnect a sheet | seat, a top sheet, and an absorber.

FIG. 1: is the top view which looked at the sanitary napkin of the 1st form manufactured by the manufacturing method of the absorbent article of this invention from the back seat | sheet side. FIG. 2: is the top view which looked at the sanitary napkin of the 2nd form manufactured by the manufacturing method of the absorbent article of this invention from the back seat | sheet side. Drawing 3 is a mimetic diagram showing the manufacture device used for implementation of one embodiment of the manufacturing method of the absorptive article of the present invention, (a) is a front view and (b) is a top view. FIG. 4: is a figure which shows the state which has applied the adhesive on the raw material of a elongate peeling sheet with the adhesive coating apparatus of 1st Embodiment of this invention, (a) A front view and (b) are top views. FIG. 5 is a partial cross-sectional perspective view showing the curtain coater in the pressure-sensitive adhesive coating apparatus according to the first embodiment of the present invention. FIG. 6 is a developed view in which the outer peripheral surface of the rotor in the pressure-sensitive adhesive coating apparatus according to the first embodiment of the present invention is developed in the circumferential direction. FIG. 7 is a cross-sectional view showing the vicinity of the pressure-sensitive adhesive discharge hole in the pressure-sensitive adhesive coating apparatus according to the first embodiment of the present invention. FIG. 8 is a developed view of the outer peripheral surface of the wing rotor for the pressure-sensitive adhesive coating apparatus according to the second embodiment of the present invention. Figure 9 is a plan view showing a state where the pressure-sensitive adhesive to a release sheet for the wing portion of the sanitary napkin of the second shape state is applied. 10 (a) to 10 (c) are plan views showing a procedure for attaching a release sheet coated with an adhesive to an absorbent article having a wing portion. FIG. 11: is a top view which shows the conventional absorbent article, (a) is a figure which shows the absorbent article which does not have a wing part, (b) is a figure which shows the absorbent article which has a wing part. FIG. 12 is a partial cross-sectional perspective view showing a curtain coater in a conventional pressure-sensitive adhesive coating apparatus.

Explanation of symbols

1 Absorbent article (Sanitary napkin)
DESCRIPTION OF SYMBOLS 11 Top sheet 12 Back sheet 12a Outer peripheral edge part 13 Absorber 14 Front part 14a Outer peripheral edge part 15 Rear part 15a Outer peripheral edge part 16 Center part 16a Outer peripheral edge part 17 Wing part 17a Outer peripheral edge part 18, 19 Adhesive area 18a, 19a Outer peripheral edge part 2 Absorbent article manufacturing apparatus 3 Adhesive coating apparatus 4 Curtain coater 41 Curtain coater body 41a Cavity part 41b Inner peripheral surface 42 Rotor 42a Outer peripheral surface 42b Recessed part 42c Communication part 43 Adhesive supply hole 44 Adhesive Ejection hole 44a Narrow tube 5 Adhesive supply part 61 Center position B Adhesive S Release sheet

Claims (4)

A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the top sheet and the back sheet are provided, and the back sheet is fixed to clothes such as shorts. The pressure-sensitive adhesive is coated with a release sheet, and the pressure-sensitive adhesive region provided with the pressure-sensitive adhesive has an outer peripheral edge spaced from the outer peripheral edge of the backsheet. The inner peripheral edge of the backsheet is provided in the longitudinal direction of the absorbent body, and the shape of the outer peripheral edge of each of the front and rear parts of the adhesive region is the shape of the outer peripheral edge of the backsheet. And a manufacturing method of an absorbent article having a substantially similar shape,
The pressure-sensitive adhesive coating step of continuously coating the pressure-sensitive adhesive on the long release sheet with a space in the longitudinal direction in a shape corresponding to the pressure-sensitive adhesive region was applied. A coating sheet conveying step for conveying the release sheet; and a sheet merging step for merging the release sheet and the back sheet conveyed by the coating sheet conveying step,
In the adhesive coating step, the curtain coater body having a hollow portion having a cylindrical inner peripheral surface, and a cylindrical outer peripheral surface substantially coinciding with the inner peripheral surface of the hollow portion, A rotor provided with one or a plurality of recesses capable of retaining the adhesive, and rotatably fitted in the cavity; an adhesive supply unit for supplying the adhesive to the recesses; recess and the adhesive discharge hole for discharging the curtain is provided a pressure-sensitive adhesive of, one or a plurality of the recessed portion is formed in a shape corresponding to the predetermined shape of each of the pressure-sensitive adhesive area, said Using a pressure-sensitive adhesive coating apparatus comprising curtain coaters that are in communication with each other at the front and rear portions in the longitudinal direction via the communication portion formed on the outer peripheral surface ,
The pressure-sensitive adhesive coating step supplies the pressure-sensitive adhesive while applying pressure from the pressure-sensitive adhesive supply unit, and discharges the pressure-sensitive adhesive from the pressure-sensitive adhesive discharge hole onto the release sheet while changing its width. And by intermittently stopping the pressure application of the adhesive in the adhesive supply section, the discharge of the adhesive from the adhesive discharge hole is intermittently stopped. A method for manufacturing an absorbent article.   Before the sheet joining step, the adhesive-coated long release sheet is cut between adjacent adhesives having a shape corresponding to the adhesive region, while The absorber is continuously disposed between the back sheet and the long top sheet with a space in the longitudinal direction, and the long back sheet and the long top sheet are disposed. The manufacturing method of the absorbent article of Claim 1 which joins and cut | disconnects between these adjacent absorbers. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent interposed between the top sheet and the back sheet are provided, and the back sheet is fixed to clothes such as shorts. The pressure-sensitive adhesive is coated with a release sheet, and the pressure-sensitive adhesive region provided with the pressure-sensitive adhesive has an outer peripheral edge spaced from the outer peripheral edge of the backsheet. The inner peripheral edge of the backsheet is provided in the longitudinal direction of the absorbent body, and the shape of the outer peripheral edge of each of the front and rear parts of the adhesive region is the shape of the outer peripheral edge of the backsheet. In the method of manufacturing an absorbent article having a substantially similar shape, the adhesive is continuously coated on the long release sheet in a shape corresponding to the adhesive region with a space in the longitudinal direction. Adhesive coating process, the adhesive is applied A coating sheet transporting step for transporting the release sheet; and a sheet merging step for joining the backsheet and the release sheet transported by the coating sheet transporting step. The pressure-sensitive adhesive is supplied from the pressure-sensitive adhesive supply section while being pressurized, and the pressure-sensitive adhesive is discharged onto the release sheet from the pressure-sensitive adhesive discharge hole while changing its width, and the pressure-sensitive adhesive supply section Of the pressure-sensitive adhesive in the manufacturing apparatus for carrying out the method in which the discharge of the pressure-sensitive adhesive from the pressure-sensitive adhesive discharge hole is intermittently stopped by intermittently stopping the pressure application of the pressure-sensitive adhesive in A coating device,
Curtain coater body having a hollow portion having a cylindrical inner peripheral surface, a cylindrical outer peripheral surface substantially coincident with the inner peripheral surface of the hollow portion, and one that can retain the adhesive on the outer peripheral surface Alternatively, a rotor provided with a plurality of recesses and rotatably fitted in the hollow part is provided, and an adhesive supply part for supplying the adhesive to the recesses is provided at the upper part, and at the lower part Is provided with a curtain coater provided with an adhesive discharge hole for discharging the adhesive in the concave portion downward in a curtain shape,
The one or a plurality of the recessed portions are each formed in a shape corresponding to the predetermined shape of the pressure-sensitive adhesive region, and communicate with each other at the front and rear portions in the longitudinal direction via the communication portions formed on the outer peripheral surface. Has been
While the rotor is rotating in the cavity, the pressure-sensitive adhesive is supplied from the pressure-sensitive adhesive supply portion to the recessed portion while being pressed, so that the pressure-sensitive adhesive is discharged from the pressure-sensitive adhesive discharge hole. On the release sheet transported under the agent discharge hole, so as to be discharged to the predetermined shape of the adhesive region,
Application of the pressure-sensitive adhesive that stops intermittently pressurizing the pressure-sensitive adhesive so that the pressure-sensitive adhesive staying in the communication portion is not discharged to the release sheet from the pressure-sensitive adhesive discharge hole. apparatus.   4. The pressure-sensitive adhesive coating apparatus according to claim 3, wherein the pressure-sensitive adhesive discharge hole is composed of a large number of thin tubes arranged linearly in the axial direction of the rotor.

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