KR20190015194A - Method of manufacturing absorbent article and apparatus for applying adhesive - Google Patents

Abstract

When a plurality of types of absorbent articles are produced in one production line, impurities are prevented from being mixed into the hot-melt adhesive while suppressing the switching time and the like of the hot-melt adhesive. A method of manufacturing an absorbent article includes manufacturing a plurality of types of absorbent articles in one production line including a coating apparatus. The application device 70 includes a first supply portion 71-1 for supplying a first hot-melt adhesive, a second supply portion 71-2 for supplying a second hot-melt adhesive, and a second supply portion 71-2 for supplying a first hot- And a coating unit 82 for applying the first or second hot-melt adhesive to the material. The manufacturing method is characterized in that in the production of the first absorbent article, the first supply portion is selected as the switching portion, the first hot-melt adhesive is applied to the first material by the application portion, 2 supply unit, and applying the second hot-melt adhesive to the second material by the application unit.

Description

Method of manufacturing absorbent article and apparatus for applying adhesive

The present invention relates to a method for manufacturing an absorbent article and an apparatus for applying an adhesive.

Absorbent articles such as sanitary napkins and disposable diapers are known. Most of the materials constituting the absorbent article are adhered to other materials by hot-melt adhesive. That is, in one absorbent article, a hot-melt adhesive is used at a plurality of locations. Therefore, in the production of the absorbent article, the application process of the hot-melt adhesive is relatively large, and accordingly, in the production line, the number of application devices of the hot-melt adhesive is large and the occupied area is wide.

As an application device applicable to the application of the hot-melt adhesive, for example, the intermittent application device of Patent Document 1 is exemplified. This intermittent application device is an apparatus for intermittently applying a coating agent to the surface of an object to be coated, which is transported in the transport direction, and one coating liquid tank is provided for one coating nozzle, so that one kind of adhesive can be applied.

Patent Document 1: JP-A-2009-148736

In the absorbent article, for example, there are a plurality of types of absorbent articles in which the hot-melt adhesives for the materials are different from each other for reasons such as different kinds of materials. For example, in the sanitary napkin, there are a plurality of kinds of sanitary napkins in which the kinds of the backsheet are different from each other like the breathable sheet and the non-breathable sheet, and the hot-melt adhesives for the breathable sheet and the breathable sheet are different from each other . Alternatively, there are a plurality of kinds of sanitary napkins in which the backsheet is the same, but the hot-melt adhesives for the high-adhesive strength and the low-adhesive strength are different from each other due to the difference in the required adhesive strength.

Such a plurality of types of absorbent articles may be manufactured in such a manner that they are shifted in time from one production line. That is, in this production line, one type of absorbent article is continuously produced at a certain time, and then another type of absorbent article is continuously produced at the same time on the same production line. In this case, it is necessary to change the hot-melt adhesive depending on the type of the absorbent article to be produced.

As a method for changing the hot-melt adhesive, in the case of using a coating device as in Patent Document 1, a method of changing the coating device to another coating device in accordance with the change of the hot-melt adhesive is considered. By using a different application device for each hot melt adhesive, it is possible to prevent the contamination of a hot melt adhesive in which a hot melt adhesive is mixed with another hot melt adhesive. However, in this case, a plurality of application devices are provided, and therefore, it is necessary to separate the former application device and to attach the next application device in a complicated manufacturing line, resulting in time and labor. In addition, since the state of the details of the constitution, for example, the state of the valve or the nozzle, is not the same even if the same apparatus as the previous coating apparatus is used, it is necessary to carry out the adjustment.

Considering the change of the hot-melt adhesive, a method of adding a coating device similar to that of Patent Document 1 one by one in advance to the production line is also considered. Even in this case, contamination of the hot-melt adhesive can be prevented. However, it is difficult to secure a space for installing an additional applicator in a complicated manufacturing line by providing a plurality of applicators. Even if an additional application device can be installed, the distance between the device and another device / device becomes short, making it difficult to adjust other devices / devices. In addition, even if the additional application device is not used, the state of the valve or the nozzle changes with time and the response characteristic changes, so it is necessary to make a new adjustment at the start of use and time and labor are required .

On the other hand, in order to reduce space, time, and labor, a method of switching only the coating liquid tank instead of switching the entire coating apparatus in the coating apparatus as in Patent Document 1 is considered. In this case, the coating liquid tank is changed over at room temperature. At this time, the previous hot-melt adhesive hardens and may adhere to pipes, valves, and the like. Then, when the hot-melt adhesive is used after switching the application liquid tank, the previous hot-melt adhesive adhered to the pipe or valve is slightly peeled off and mixed into the hot-melt adhesive after conversion as an impurity to be applied to the absorbent article. In this case, the function and performance of the absorbent article due to peeling, discoloration, or reaction of a part of the material may be deteriorated, and defective products may be generated, which may lower the production yield.

It is an object of the present invention to provide a method and apparatus for producing a plurality of types of absorbent articles in a single production line, in which when producing different types of absorbent articles, A method of manufacturing an absorbent article capable of maintaining the function and characteristics of the absorbent article while suppressing the mixing of impurities into the hot melt adhesive while suppressing labor, and an apparatus for applying an adhesive.

The method for producing the absorbent article of the present invention is as follows. (1) A method of manufacturing a plurality of types of absorbent articles, each comprising a plurality of materials constituting an absorbent article, which are adhered with a hot-melt adhesive agent and in which hot-melt adhesives corresponding to at least one of the plurality of materials are mutually different, Wherein the applying device includes a first receiving port, a second receiving port, and a delivery port, wherein a receiving port communicating with the discharging port is provided in the first receiving port and the second receiving port, And a second hot-melt adhesive different from the first hot-melt adhesive to the second hot-melt adhesive, the second hot-melt adhesive being different from the second hot- A second hot melt adhesive or a second hot melt adhesive which is connected to the delivery port and is delivered from the delivery port to a material Wherein the first supplying portion, the switching portion, and the applying portion are heated, and the first supplying portion, the switching portion and the applying portion are heated, and the first supplying portion, the switching portion and the applying portion are heated, A first applying step of applying a first hot-melt adhesive to a first material through a receiving port communicating with the delivery port, and applying the first hot-melt adhesive to the first material by the applying unit; and a second applying step of producing the second absorbent article of the plurality of types of absorbent articles, Melt adhesive to the second material by heating the second supply portion, the switching portion, and the application portion, communicating the second receiving port of the switching portion to the outlet port, and applying the second hot- A method for manufacturing an absorbent article, comprising the step of applying.

The method of manufacturing the absorbent article according to the present invention allows the hot melt adhesive to be easily changed only by switching the switching portion when the type of the absorbent article to be produced is changed. At this time, in the present manufacturing method, it is only necessary to add substantially one supply unit (one type) and there is no need to arrange another one of the application devices in parallel, thereby saving space. In addition, in this manufacturing method, since the application portion is shared by the two types of hot-melt adhesives, it is unnecessary to perform almost any adjustment as compared with the case where the application device itself is switched or an additional application device is used. The trouble can be reduced. Further, in the present manufacturing method, since switching of the apparatus is substantially unnecessary, time and labor can be reduced as compared with the case of switching the coating apparatus itself. On the other hand, at the time of switching the hot-melt adhesive, since the application portion and the switching portion shared by the two types of hot-melt adhesives are substantially heated, the former hot-melt adhesive can be reduced in hardness and adhesion at the application portion and the switch portion . As a result, it is possible to avoid a situation in which the hot-melt adhesive prior to curing is slightly peeled off and used as an impurity in the hot-melt adhesive after conversion at the time of using the hot-melt adhesive after conversion. As a result, it is possible to prevent the phenomenon that the functions and characteristics of the absorbent article due to the impurities are deteriorated, defective products are produced, and the production yield is lowered. As described above, in the present manufacturing method, when applying one of the two types of hot-melt adhesives to a material, by using a coating device, which is partly used in common, the space, time, It is possible to suppress the incorporation of impurities into the hot melt adhesive and to maintain the function and characteristics of the absorbent article.

(2) The first hot-melt adhesive and the second hot-melt adhesive have different melting points from each other. In the first coating step, the first supplying portion, the switching portion, Melt adhesive is heated at a temperature higher than the melting point based on the melting point of the first hot-melt adhesive, and in the second application step, the second supply portion, the switching portion, and the application portion are heated based on the melting point of the second hot- (1), wherein the heating is carried out at a temperature higher than the melting point.

In the method of manufacturing the absorbent article according to the present invention, it is possible to prevent the hot-melt adhesive from being hardened or adhered to the tube or valve during the movement even if the melting point of the hot-melt adhesive is different depending on the difference of the hot- It is possible to maintain the function and characteristics of the absorbent article. Further, since various hot-melt adhesives having different melting points can be used for application, it is possible to select a hot-melt adhesive suitable for maintaining the functions and characteristics of the absorbent article, and it is possible to select freedom of the hot-melt adhesive and freedom of selection of the material and the second material .

(3) The absorbent article according to (1) or (2), wherein the second supplying portion is heated before the first application step is completed in the second applying step A manufacturing method may be used.

In the method of manufacturing the absorbent article according to the present invention, the second hot melt adhesive can be sufficiently melted to be applied immediately after the completion of the first application step. As a result, the first hot-melt adhesive is immediately changed to the second hot-melt adhesive, so that the second hot-melt adhesive can be immediately transferred to the second application step. That is, the switching time of the hot-melt adhesive can be suppressed.

The manufacturing method of the absorbent article of the present invention is characterized in that (4) the apparatus of the production line is attached to the surface side of the wall surface, the first supply part, the second supply part and the switching part are disposed on the back side of the wall surface, (1) to (3), wherein the application portion is disposed on the surface side of the wall surface.

In the method of manufacturing the absorbent article according to the present invention, the distance between the coated portion on the surface side of the wall surface and the first supply portion, the second supply portion, and the switching portion is close to each other. The time and labor of the apparatus can be reduced. In addition, since the back surface side of the wall surface is used as the installation space for the first supply portion, the second supply portion, and the switching portion, space on the front surface side is saved.

(5) Each of the first supply unit and the second supply unit includes an adhesive storage tank and an adhesive supply pipe for connecting the adhesive storage tank and the switching unit, Wherein the first hot-melt adhesive and the second hot-melt adhesive in the switching portion, the adhesive dispensing tube, and the application nozzle are used for common use as a dispensing nozzle and an adhesive dispensing pipe for connecting the dispensing nozzle and the switching portion, Wherein the volume of the flow path is smaller than the volume of the flow path through which either the first hot-melt adhesive or the second hot-melt adhesive in the switching portion and the adhesive supply pipe is exclusively flown, The first hot melt adhesive in the adhesive dispensing tube and the application nozzle is attached to the adhesive supply pipe of the second supply part The supplied first by extruding a hot melt adhesive, and the second may be a manufacturing method of an absorbent article according to any one of the comprising a replacement step for replacing with a hot-melt adhesive, the above-mentioned (1) to (4).

In the method of manufacturing the absorbent article, the amount of the second hot-melt adhesive to be extruded can be reduced in the replacing step, and the first hot-melt adhesive can be removed from the common portion. As a result, the time required for the replacement step can be shortened, the time and labor for switching the hot-melt adhesive can be reduced, the hot-melt adhesive can be switched, and the incorporation of impurities into the second hot-melt adhesive can be suppressed .

(6) The first application step and the second application step each include an intermittent application step of intermittently applying the hot-melt adhesive to the material,

(1) to (5), wherein a common intermittent application control is performed by the application device in the intermittent application step of the first application step and the intermittent application step of the second application step And the method of producing an absorbent article according to the present invention.

In the method of manufacturing the absorbent article according to the first aspect of the present invention, in the first coating step and the second coating step, the apparatus for intermittent application, that is, the coating unit has a common structure, and the control for performing intermittent application, It is possible to facilitate the adjustment of the application device at the time of switching the hot-melt adhesive, as compared with the case where the application device for intermittent application and the application device for the different control are used.

(7) The method of manufacturing an absorbent article of the present invention is characterized in that the application section includes a coating nozzle for contact-type application, and the first coating step is a step of applying the first hot- (1) to (6), wherein the second hot-melt adhesive is applied to the first material by contact with the second material with the application nozzle for the contact-type application, And the method of producing an absorbent article according to the present invention.

In this method for manufacturing an absorbent article, since the hot-melt adhesive is applied to the material by the application nozzle for contact-type application, the influence of the adhesion residue of the hot-melt adhesive on the nozzle, which may occur in the application nozzle for non- have. As a result, the hot melt adhesive can be easily changed, and time and labor can be suppressed.

An apparatus for applying an adhesive of the present invention is as follows. (8) a switching unit having a first receiving port, a second receiving port, and a sending port, for switching a receiving port communicating with the sending port from one of the first receiving port and the second receiving port to the other; A second supply part for supplying a first hot-melt adhesive to the first receiving hole, a second supplying part for supplying a second hot-melt adhesive different from the first hot-melt adhesive to the second receiving hole, And an application unit for applying the first hot-melt adhesive agent or the second hot-melt adhesive agent dispensed from the delivery port to the material.

In the present applicator for applying an adhesive, the hot-melt adhesive can be easily changed only by switching the switching portion when the type of the manufactured article is changed. At this time, in the present applicator, it is only necessary to substantially add the supply part to the supply part, and it is not necessary to arrange another application device in parallel, so that space is saved. Further, in the present applicator, since the applicator is shared by the two kinds of hot-melt adhesives, it is unnecessary to perform almost any adjustment as compared with the case of switching the applicator itself or using an additional applicator, The trouble can be reduced. Further, in the present applicator, since switching of the apparatus is substantially unnecessary, time and labor can be reduced as compared with the case of switching the applicator itself. On the other hand, at the time of switching the hot-melt adhesive, since the application portion and the switching portion shared by the two types of hot-melt adhesives are substantially heated, the former hot-melt adhesive can be reduced in hardness and adhesion at the application portion and the switch portion . As a result, it is possible to avoid a situation in which the hot-melt adhesive prior to curing is slightly peeled off and used as an impurity in the hot-melt adhesive after conversion at the time of using the hot-melt adhesive after conversion. As a result, it is possible to prevent the phenomenon that the functions and characteristics of the article due to impurities are lowered, defective products are generated, and the production yield is lowered. As described above, in the present applicator, when applying one of the two kinds of hot-melt adhesives to a material, by using a coater which is partly used in common, the space, time, and trouble in switching the hot- The incorporation of impurities into the hot-melt adhesive can be suppressed, and the function and characteristics of the article can be maintained.

According to the present invention, when a plurality of types of absorbent articles are produced in one production line, when producing different types of absorbent articles, the space, time, It is possible to provide a method of manufacturing an absorbent article and an apparatus for applying an adhesive, which can suppress the incorporation of impurities into the hot melt adhesive while suppressing labor, thereby maintaining the function and characteristics of the absorbent article.

1 is a plan view showing a configuration of an absorbent article according to a first embodiment.
2 is an exploded perspective view showing the structure of the absorbent article according to the first embodiment.
3 is a schematic diagram showing a configuration of an apparatus for manufacturing an absorbent article according to the first embodiment.
Fig. 4 is a schematic diagram showing a configuration of an apparatus for applying an adhesive according to the embodiment. Fig.
Fig. 5 is a schematic diagram showing the operation of the adhesive applicator according to the embodiment. Fig.
6 is a plan view showing the structure of the absorbent article according to the second embodiment.
7 is a schematic diagram showing a configuration of an apparatus for manufacturing an absorbent article according to the second embodiment.

(First Embodiment)

Hereinafter, the method of manufacturing the absorbent article and the application device according to the present embodiment will be described using a sanitary napkin as an example of the absorbent article. However, the absorbent article of the present invention is not limited to the example, and other absorbent articles may be used as long as they do not depart from the scope of the present invention.

The configuration of the absorbent article 1 will be described. 1 and 2 are a plan view and an exploded perspective view of the absorbent article 1 in a developed state. The absorbent article 1 has an absorbent article body 1A and a packaging sheet 1B and the absorbent article body 1A is removably fixed to a substantially rectangular package sheet 1B. The absorbent article body 1A has a central axis L extending in the longitudinal direction L beyond the center of the width direction W and having a longitudinal direction L, a width direction W and a thickness direction H orthogonal to each other, And a central axis CW extending in the width direction W beyond the center of the longitudinal direction L of the pair of flap portions 2b and 2b (described later). In Fig. 1, the upper and lower sides are facing forward and rearward, respectively, of the absorbent article body 1A. The longitudinal direction L and the widthwise direction W of the absorbent article body 1A coincide with the longitudinal direction and the widthwise direction of the package sheet 1B, The longitudinal direction L and the width direction W are used. In this specification, it is simply referred to as " planar view (plan view) " when viewing the absorbent article 1 or the absorbent article body 1A in a flat and unfolded state from the upper surface side in the thickness direction. The terms "skin side" and "non-skin side" mean that the wearer of the absorbent article body 1A wears the absorbent article body 1A in the thickness direction H relatively close to the wearer's skin surface, Respectively. The directions toward and away from the center axis CL are the inner and outer directions of the width direction W, respectively. The direction toward and away from the central axis CW is the inner and outer directions of the longitudinal direction L. [

The absorbent article body 1A includes a body portion 2a extending in the longitudinal direction L and a pair of side wall portions 22b extending in the width direction W on both sides in a substantially central portion of the longitudinal direction L. [ Flap portions 2b and 2b, and has a crimping portion 2E around the excretory contact area of the body 2a. The absorbent article body 1A comprises at least a liquid permeable topsheet 2 located on the wearer's skin side, a liquid impervious backsheet 3 located on the non-skin side of the wearer, a topsheet 2 And a liquid-absorbent and liquid-retaining absorber (4) positioned between the backsheet (3) and the backsheet (3). Examples of the top- and backsheet 2 include liquid-permeable sheets such as liquid-permeable non-woven fabric, woven fabric, synthetic resin film formed with liquid through-holes, and composite sheets of these. As the backsheet 3, for example, any liquid-impermeable sheet such as liquid-impervious nonwoven fabric, synthetic resin film, composite sheet or SMS nonwoven fabric may be mentioned. The backsheet 3 may have air permeability or moisture permeability in addition to liquid impermeability in order to reduce erosion at the time of wearing. An outer sheet 9 for reinforcing the backsheet 3 and improving the feeling may be laminated on the non-skin side of the backsheet 3. As the outer sheet 9, the same material as that of the back sheet 3 can be used. The absorber 4 is disposed between the upper layer core wraps 4U on the skin side and the lower layer core wraps 4L on the non skin side and between the upper layer core wraps 4U and the lower layer core wraps 4L And the absorbent core 4A. Examples of the absorbent core 4 or the absorbent core 4A include pulp fibers, synthetic fibers, and water absorbent polymers. Examples of the upper layer core wraps 4U and the lower layer core wraps 4L include nonwoven fabrics and tissues. However, the absorbent article body 1A is not limited to this structure, and a known structure generally used in the absorbent article 1 can be used.

The absorber 4 and the topsheet 2 are joined together by an adhesive 45 of a predetermined pattern (not shown), and the absorber 4 and the backsheet 3 are bonded to each other with an adhesive (46). The topsheet 2 and the backsheet 3 are bonded to each other by adhesive agents 45 and 46 of a predetermined pattern (not shown) at their periphery. The absorbent core 4A and the upper layer core wrap 4U are bonded to each other by an adhesive 43 of a predetermined pattern (not shown), and the absorbent core 4A and the lower layer core wrap 4L are bonded to each other in a predetermined pattern (Not shown). The upper layer core wraps 4U and the lower layer core wraps 4L are bonded to each other at their peripheral portions by adhesives 43 and 44 of a predetermined pattern (not shown).

The main body portion 2a of the absorbent article main body 1A has the fixing portion 42 on the non-skin side of the backsheet 3. The fixing portion 42 is extended in the longitudinal direction L with a predetermined width in the width direction W. [ Each of the flap portions 2b of the absorbent article body 1A is provided with another fixing portion 41 on the non-skin side of the backsheet 3. The other fixing portion 41 is provided extending in the longitudinal direction L with a predetermined width in the width direction (W). As the fixing portions 41 and 42, for example, a sticky adhesive is used. The absorbent article body 1A is fixed to the package sheet 1B through the fixing portions 41 and 42. [ The package sheet 1B has peeling sheets 31 and 32 at portions contacting these fixing portions 41 and 42 and the absorbent article body 1A is detachably fixed to the package sheet 1B. The peeling sheets 31 and 32 and the package sheet 1B are bonded to each other with an adhesive 47 of a predetermined pattern (not shown). However, the shape of the fixing portions 41 and 42 is not limited to the shape, and any known shape or number commonly used in the absorbent article 1 may be used.

As the material of each of the above-mentioned adhesives, a known adhesive material commonly used in the absorbent article 1 such as a thermoplastic resin adhesive is used, but at least one of them is a hot-melt adhesive. (PE, EVA, EEA, APP, APO, etc.) can be used as the material of the respective hot melt adhesives, and known hot melt adhesives commonly used in the absorbent article 1 can be used. , Synthetic rubber type (SIS type, SBSS type, etc.) and the like. (For example, a tackifier, a plasticizer, an antioxidant, or the like) may be added in order to obtain desired properties (e.g., viscosity, softening point, stability, etc.). The material (kind) of the hot-melt adhesive is appropriately changed depending on the desired characteristics, compatibility with the applied material, and the like. These hot melt adhesives have different melting points due to differences in materials and additives.

The absorbent article main body 1A and the package sheet 1B are folded into a plurality of fold lines FLT1 and FLT2 extending in parallel in the longitudinal direction L while the absorbent article body 1A is fixed to the package sheet 1B And is folded at the position of a plurality of fold lines FLV1, FLV2, FLV2 'extending in parallel in the width direction W. An adhesive tape tape 35 is attached to an end portion on the front side in the longitudinal direction L of the package sheet 1B. Examples of the material of the package sheet 1B include known materials commonly used for packaging the absorbent article body 1A, such as resin films, paper, and nonwoven fabrics.

Next, a method of manufacturing the absorbent article 1 will be described. 3 is a schematic diagram showing a configuration of an apparatus 300 for manufacturing an absorbent article 1. The manufacturing apparatus 300 includes a first forming unit 300A, a second forming unit 300B, a third forming unit 300C, a fourth forming unit 300D, a control unit 300X). The method for producing an absorbent article using the manufacturing apparatus 300 is characterized in that the first forming step performed by the first forming unit 300A, the second forming step performed by the second forming unit 300B, A third forming step in which the third forming unit 300C performs the third forming step, and a fourth forming step performed in the fourth forming unit 300D. The control device 300X controls the operation of the manufacturing apparatus 300. [

The rotary drum 111 of the fiber laminator 110 is rotated and the fiber lamination material supplied from the material feeder 113 is fed into the groove communicated with the negative pressure chamber 111N of the pattern plate 112 And the fiber layered product AB is formed in the groove. Next, when the pattern plate 112 reaches the static pressure chamber 111P together with the fiber laminate AB, the fiber laminate AB is released from the pattern plate 112. Then, On the other hand, an upper layer tissue sheet UT of a continuous sheet type is fed from the roll WR1 to the conveyor belt 115. [ A hot-melt adhesive (corresponding to the adhesive 43) is applied to one side of the upper-layer tissue sheet UT by a coating device 301. Then, the fiber laminate AB is pushed onto one surface of the upper layer tissue sheet UT on the conveying belt 115. Thus, the first semi-finished product P1 is formed. The first semi-finished product P1 is sucked by the suction device 116 and conveyed to the conveyer belt 115. [ Next, the lower layer tissue sheet LT of the continuous sheet type is fed from the roll WR2 to the conveyor belt 115. [ A hot-melt adhesive (corresponding to the adhesive 44) is applied to one surface of the lower-layer tissue sheet LT by a coating device 302. [ One side of the lower layer tissue sheet LT is pressed against the first semi-finished product P1 on the conveying belt 115. [ Whereby the second semi-finished product P2 is formed. Next, the second semi-finished product P2 is pressed by the pressing device 120 and cut into the shape of the absorber 4 by the cutting device 130. [ Whereby the third semi-finished product P3 as the absorber 4 is formed. And the third semi-finished product P3 is transferred to the conveying roll 141. [

Next, in the second forming step, a continuous sheet-like topsheet TS is fed from the roll WR3 to the conveyor belt 140. [ A hot-melt adhesive (corresponding to the adhesive 45) is applied to one surface of the topsheet TS by a coating device 303. The third semi-finished product P3 fed from the conveying roll 141 is pushed onto one surface of the topsheet TS. Thus, the fourth semi-finished product P4 is formed. Next, the fourth semi-finished product P4 is squeezed by the compression bonding device 150 to form the fifth semi-finished product P5. The fifth semi-finished product P5 is transferred to the conveying roll 160. [

Next, in the third forming step, the back sheet BS of the continuous sheet type is fed from the roll WR4 to the conveying roll 161. Then, A hot-melt adhesive (adhesive 46) is applied to one side of the backsheet BS by a coating device 304. [ The backsheet BS supplied from the transport roll 161 is pushed onto the transport roll 160 on one side of the fifth semi-finished product P5. Thus, a sixth semi-finished product P6 is formed. The sixth semi-finished product P6 is transferred to the conveying roll 170. [

Next, in the fourth forming step, a continuous sheet type peeling sheet CT is fed from the roll WR5 to the back side fixing unit 171. [ On one side of the release sheet CT, a hot-melt adhesive (corresponding to the fixing portion 42) is applied by a coating device 305. The release sheet CT is cut into a predetermined shape by the back side fixing unit forming apparatus 171. [ As a result, the release sheet CT becomes the release sheet 32, and the hot melt adhesive becomes the fixing portion 42. [ Then, the release sheet 32 having the fixing portion 42 is pressed against the sixth semi-finished product P6. Thus, the seventh semi-finished product P7 is formed. Next, in the seventh semi-finished product P7, the peripheral portion is heated by the peripheral sealing device 180, and the edge is adhered to the heat seal. Thus, the eighth semi-finished product P8 is formed. The eighth semi-finished product P8 is conveyed to the conveying roll 190. [ Next, a continuous sheet type peeling sheet FT is fed from the roll WR6 to the flap fixing portion forming device 191. [ A hot melt adhesive (corresponding to the fixing portion 41) is applied to one side of the release sheet FT by a coating device 306. [ The release sheet FT is cut into a predetermined shape by the flap fixing portion forming device 191. [ As a result, the release sheet FT becomes the release sheet 31, and the hot melt adhesive becomes the fixing portion 41. Then, the release sheet 31 having the fixing portion 41 is pressed against the eighth semi-finished product P8. Thus, the ninth semi-finished product P9 is formed. Next, in the ninth semi-finished product P9, the peripheral portion is cut by the peripheral cutting device 200 and is separated into the shape of the absorbent article body 1A. Thus, the tenth semi-finished product P10 is formed. The tenth semi-finished product P10 is transferred to the transfer roll 210. [ Next, a continuous sheet type package sheet WT is fed from the roll WR7 to the transfer roll 210. [ A hot-melt adhesive (corresponding to the adhesive 47) is applied to one side of the wrapping sheet WT by a coating device 307 in a predetermined shape. The wrapping sheet WT is laminated on the tenth semi-finished product P10 sucked and conveyed on the outer peripheral surface of the transfer roll 210 through a hot-melt adhesive. Thereby, the absorbent article body 1A in which the wrapping sheet WT is laminated, that is, the absorbent article 1 is formed. The absorbent article 1 is returned to the packaging process. However, the description of the packaging step performed by a known method is omitted.

Thus, the packaged absorbent article 1 is produced.

However, the structure is substantially the same, but depending on the reasons such as the kind of the material, the dimension of a part of the material, the kind of the additive to be attached, and the like, the plurality of kinds of the absorbent articles Lt; / RTI > Such a plurality of types of absorbent articles may be manufactured in such a manner that they are shifted in time from one production line. For example, when using the breathable sheet as the backsheet and when using the non-breathable sheet, it may be necessary to switch the hot-melt adhesive. In other words, a non-breathable sheet is provided with a hot-melt adhesive which is easy to handle and has a large amount of oil. However, when a hot-melt adhesive having a large amount of oil is used for the breathable sheet, a large number of fine holes are opened in the breathable sheet. It penetrates. As a result, the oil content of the backsheet rises and the oil content in the hot-melt adhesive decreases, which may deteriorate both the properties of the backsheet and the hot-melt adhesive. Therefore, when using the breathable sheet as the backsheet and using the non-breathable sheet, it is necessary to use the hot-melt adhesives different in oil content separately.

As a method of changing the hot-melt adhesive, a method of changing the application device to another application device in accordance with the change of the hot-melt adhesive, or a method of previously adding the other application devices in parallel to the production line is considered. These methods can prevent the hot melt adhesive from being mixed with other hot melt adhesives by using different application devices for each type of hot melt adhesive. However, in the production of an absorbent article using a large number of hot-melt adhesives as shown in Fig. 3, it takes a lot of space, time, and labor for replacement, installation and adjustment of the application device. A method of exchanging only the coating liquid tank without replacing the application device may be considered. However, there is a possibility that the function and performance of the absorbent article are deteriorated by mixing the hot-melt adhesive with another hot-melt adhesive.

Therefore, in the present embodiment, when a plurality of kinds of absorbent articles are manufactured in one production line by using the following coating device, the space, time, It is possible to suppress the incorporation of impurities into the hot-melt adhesive while suppressing the labor, thereby making it possible to maintain the functions and characteristics of the absorbent article. Hereinafter, the coating apparatus and the method of manufacturing the absorbent article using the same will be described in detail.

Figs. 4 and 5 are schematic diagrams showing an apparatus 70 for applying an adhesive according to the embodiment. Fig. Fig. 4 is a diagram showing the configuration of the application device 70, and Figs. 5 (a) to 5 (c) are views for explaining the operation of the application device 70. Fig. In the manufacturing apparatus 300 shown in FIG. 3, at least one of the application apparatuses 301 to 307 is the application apparatus 70 shown in FIG.

The application device 70 includes a switching portion 76, a first supply portion 71-1, a second supply portion 71-2, and a coating portion 82. [ The switching portion 76 is provided with a first receiving port 91A, a second receiving port 91B and a discharging port 91C and a receiving port communicating with the discharging port 91C is provided at the first receiving port 91A, And the second receiving port 91B. The first supply part 71-1 supplies the first hot melt adhesive to the first receiving hole 91A. The second supply portion 71-2 supplies a second hot melt adhesive different from the first hot melt adhesive to the second receiving hole 91B. The application section 82 applies a first hot-melt adhesive agent or a second hot-melt adhesive agent, which is connected to the delivery port 91C and is delivered from the delivery port 91C, to the material.

The first supply unit 71-1 includes an adhesive storage tank 72-1, an adhesive supply pipe 74-1, a valve 73-1, and a heating unit 75-1. The adhesive storage tank 72-1 stores the first hot-melt adhesive. The adhesive supply pipe 74-1 is a dedicated flow path for the first hot melt adhesive and has one end connected to the adhesive storage tank 72-1 and the other end connected to the first receiving port 91A of the switch 76, Hose. The valve 73-1 is disposed in the middle of the adhesive supply pipe 74-1 and performs supply or stop of the first hot melt adhesive and is exemplified as a solenoid valve. The heating section 75-1 is exemplified by an electric heater in which the first supply section 71-1 is heated to set the first hot melt adhesive at a predetermined temperature higher than the melting point. On the other hand, the second supply unit 71-2 includes an adhesive storage tank 72-2, an adhesive supply pipe 74-2, a valve 73-2, and a heating unit 75-2. The adhesive storage tank 72-2 stores the second hot-melt adhesive. The adhesive supply pipe 74-2 is a dedicated flow path for the second hot melt adhesive and has one end connected to the adhesive storage tank 72-2 and the other end connected to the second receiving port 91B of the switch 76, Hose. The valve 73-2 is disposed in the middle of the adhesive supply pipe 74-2 and performs supply or stop of the second hot melt adhesive and is exemplified as a solenoid valve. The heating section 75-2 is exemplified by an electric heater in which the second supply section 71-2 is heated to set the second hot-melt adhesive at a predetermined temperature higher than the melting point.

The switching portion 76 has a three-way valve structure, and is, for example, a ball valve. The switching unit 76 is provided with the switching structure 79, the first flow path 77A, the second flow path 77B, the third flow path 77C, the heat insulating plates 78-1 and 78-2, . The first flow path 77A is a dedicated flow path for the first hot melt adhesive and has one end receiving the first receiving port 91A and the discharge port 92A at the other end contacting the switching structure 79. The second flow path 77B is a dedicated flow path for the second hot melt adhesive and one end is the second receiving port 91B and the discharge port 92B at the other end is in contact with the switching structure 79. The third flow path 77C is a common flow path for the first and second hot melt adhesives. One end is the outlet 91C and the inlet 92C at the other end is in contact with the switching structure 79. The switching structure 79 is a sphere arranged in a spherical space in the switching portion 76 and the outer surface of the sphere contacts the inner surface of the spherical space to be rotatable. In the inside of the switching structure 79, an in-valve flow passage 80 having a common L-shaped flow path for the first and second hot melt adhesives and having outlets 93 and 94 at both ends thereof is formed. The heat insulating plates 78-1 and 78-2 thermally block the switching unit 76 and the first supplying unit 71-1 and the second supplying unit 71-2, respectively. The heating section 81 is exemplified by an electric heater in which the switching section 76 is heated to set the first and second hot-melt adhesives at a predetermined temperature higher than the melting point.

The application section 82 includes an adhesive delivery pipe 83, a coating nozzle 84, and a heating section 89. The adhesive dispensing pipe 83 is a common flow path for the first and second hot melt adhesives. One end of the adhesive is connected to the dispensing opening 91C and the other end is connected to the dispensing nozzle 84, and is illustrated as a hose. The application nozzle 84 includes an application head 88, an adhesive supply pipe 86, a filter 85, and a valve 87. The application head 88 sends out the hot melt adhesive in the form of a liquid or a fine particle toward the material. The adhesive supply pipe 86 is a common flow path of the first and second hot melt adhesives and connects the application head 88 and the adhesive delivery pipe 83. The filter 85 is disposed in the middle of the adhesive dispensing pipe 83 to remove dust and the like in the hot-melt adhesive. The valve 87 is disposed in the middle of the adhesive supply pipe 86, and supplies or stops the hot-melt adhesive, and is illustrated as a solenoid valve. The heating section 89 is exemplified by an electrothermal heater in which the entirety of the application section 82 is heated to a predetermined temperature higher than the melting point of the hot melt adhesive.

In the present embodiment, the application device 70 also includes a control device 90 exemplified by a computer, and the control device 90 includes a first supply part 71-1, a second supply part 71-2, And controls the operation of the unit 76 and the application unit 82. As a result, the application device 70 can perform intermittent application or contact application. Although not shown, temperature sensors are provided in the first supply part 71-1, the second supply part 71-2, the switching part 76 and the application part 82, and the respective heating parts 75-1 and 75- 2, 81, and 89 are controlled by the control device 90 based on the temperature of the temperature sensor. On the other hand, when three or more kinds of hot melt adhesives are used, three or more kinds of supply portions 71 are provided with the switching portion 76 being a four-way valve or more.

The method of switching the hot-melt adhesive using the application device 70 is as follows.

First, application of the first hot-melt adhesive to the material is started (first adhesive application step). That is, the first supply part 71-1, the switching part 76 and the application part 82 are connected to the first hot-melt adhesive agent 71-1 by the heating part 75-1, the heating part 81 and the heating part 89, To a predetermined temperature higher than the melting point of the water. The valve 73-1 is opened so that the first hot melt adhesive is sent out from the adhesive storage tank 72-1 and passed through the adhesive supply pipe 74-1 to the first receiving port 91A of the switching portion 76 And reaches the discharge port 92A through the first flow path 77A. At this time, as shown in FIG. 5 (b), by the rotation of the switching structure 79, the entrance 94 of the in-valve flow path 80 is connected to the discharge port 92A of the first flow path 77A, (93) is connected to the inlet (92C) of the third flow path (77C). As a result, the first hot melt adhesive reaches the delivery port 91C through the in-valve flow path 80 and the third flow path 77C. The first hot melt adhesive then reaches the valve 87 while the dust or the like is removed by the filter 85 through the adhesive feed pipe 83 and the adhesive supply pipe 86 and the valve 87 is opened And is applied to the first material from the application head 88.

Thereafter, the application of the first hot-melt adhesive to the material is stopped. That is, the valve 73-1 is closed and the heating unit 75-1 stops heating (stopping step).

Next, application of the second hot-melt adhesive to the material is started (second adhesive application step). That is, the second supply portion 71-2, the switching portion 76, and the application portion 82 are respectively connected to the second hot-melt adhesive agent 71-2 by the heating portion 75-2, the heating portion 81 and the heating portion 89, To a predetermined temperature higher than the melting point of the water. The valve 73-2 is opened so that the second hot melt adhesive is dispensed from the adhesive storage tank 72-2 and is supplied to the second receiving port 91B of the switching portion 76 through the adhesive supply pipe 74-2 And reaches the discharge port 92B through the second flow path 77B. 5A, the opening 93 of the in-valve flow path 80 is connected to the discharge port 92B of the second flow path 77B by the rotation of the switching structure 79, (94) is connected to the inlet (92C) of the third flow path (77C). As a result, the second hot-melt adhesive reaches the delivery port 91C through the in-valve flow path 80 and the third flow path 77C. The second hot melt adhesive then reaches the valve 87 while the dust or the like is removed by the filter 85 through the adhesive feed pipe 83 and the adhesive supply pipe 86 and the valve 87 is opened And is applied to the second material from the application head 88.

However, when the first hot-melt adhesive agent is converted into the second hot-melt adhesive agent, the first hot-melt adhesive agent is used to extrude the first hot-melt adhesive agent at the start of the second adhesive agent application step (or during the stopping step) , It is preferable to carry out a substitution step of substituting with a second hot-melt adhesive. 5 (c), both of the outlets 93 and 94 at both ends of the in-valve flow path 80 are rotated by the rotation of the switching structure 79 as shown in Fig. 5 (c) The discharge port 92B of the second flow path 77B and the inlet port 92C of the third flow path 77C so that the switching portion 76 can be made to be in a state of being disconnected.

In the application device 70, the volume of the flow path through which the first hot-melt adhesive agent and the second hot-melt adhesive agent in the switching portion 76, the adhesive agent delivery pipe 83, and the application portion 82 are communicated, Melt adhesive and the second hot-melt adhesive in the adhesive supply pipe 74 and the adhesive supply pipe 74 are preferably smaller than the volume of the flow path through which only one of the first hot-melt adhesive and the second hot- That is, the flow path of the hot-melt adhesive in the in-valve flow path 80 and the third flow path 77C of the switching portion 76, the adhesive feed pipe 83 of the switching portion 76, and the adhesive supply pipe 86 of the application portion 82 The volume of the flow path through which the first hot melt adhesive flows in the first flow path 77A of the switching portion 76 and the adhesive supply pipe 74-1 and the volume of the second flow path 77B of the switching portion 76, And the second hot-melt adhesive in the adhesive supply pipe 74-2 flows. Thus, in the replacing step, the amount of the second hot-melt adhesive to be extruded can be reduced, and the first hot-melt adhesive can reliably be removed from the common portion. Further, the time required for the replacement step can be shortened, time and labor for switching the hot-melt adhesive can be reduced, and mixing of impurities into the second hot-melt adhesive can be suppressed.

Next, a method of manufacturing the absorbent article 1 using the above-described method of switching the hot-melt adhesive using the application device 70 will be described. Hereinafter, as an example, the first absorbent article 1 of any kind may be manufactured by using a first material (for example, a non-breathable sheet) for any one material (for example, a backsheet) A description will be made of a case where a second type of absorbent article 1 (for example, a breathable sheet) is used to produce another kind of second absorbent article 1.

In this manufacturing method, first, in the production of the first absorbent article 1 of a plurality of types of absorbent articles, the application device 70 for applying a hot-melt adhesive to the first material is provided with a first supply part 71-1, The switching unit 76 and the application unit 82 are heated. Subsequently, the first receiving port 91A of the switching portion 76 is communicated with the discharging port 91C. Subsequently, the first hot melt adhesive is supplied from the first supply portion 71-1 to the application portion 82 through the switching portion 76. Then, Then, the first hot melt adhesive is applied to the first material by the application portion 82 (first coating step). However, details of the first coating step are the same as those of the first adhesive applying step.

Thereafter, with the end of the production of the first absorbent article 1, the first supply part 71-1 is stopped. However, the details of stopping the first supply unit 71-1 are the same as those described above. Then, the first material is exchanged with the second material, and the manufacture of the second absorbent article 1 is started.

Next, in the production of the second absorbent article 1 of the plurality of types of absorbent articles, the second supply portion 71-2, the switching portion 76 and the application portion 82 are heated. Next, the second receiving port 91B of the switching section 76 is connected to the discharging port 91C, and the second hot melt adhesive is applied from the second supplying section 71-2 through the switching section 76 to the applying section 82. Then, the second hot-melt adhesive is applied to the second material by the application unit 82 (second coating step). However, details of the second application step are the same as those of the second adhesive application step.

However, in the second coating step, it is preferable that the second supplying part 71-2 is heated before the first coating step is completed. That is, it is preferable that the second hot-melt adhesive is sufficiently melted until immediately before the end of the first application step so that the second hot-melt adhesive can be applied. Thereby, after the completion of the first coating step, the first hot-melt adhesive can be immediately switched to the second hot-melt adhesive, so that the second coating step can be immediately carried out. Thus, the time for switching the hot-melt adhesive can be suppressed.

As described above, in the method of manufacturing the absorbent article 1 described with reference to Fig. 3, the hot-melt adhesive is switched using the method of switching the hot-melt adhesive using the coating device 70 described above.

In the present applicator 70 and the manufacturing method of the absorbent article 1 using the same, two supply portions 71-1 and 71-2 capable of supplying two types of hot melt adhesives are provided, Type hot-melt adhesive is selected and applied to the material with one application portion 82. Therefore, the hot-melt adhesive can be easily changed from one side to the other only by switching the switching portion 76 when the type of the absorbent article 1 to be produced is changed and the hot-melt adhesive to be required is switched. In addition, two kinds of hot-melt adhesives are used, and only the solar cells are added to the supply unit 71 (for example, the adhesive storage tank 72 and the adhesive supply pipe 74) and the application units are arranged in parallel There is no need to do so, and space is saved. Since the application portion 82 is shared by two types of hot-melt adhesives, it is not necessary to perform almost any adjustment of the apparatuses, and the time and labor can be reduced, as compared with the use of the other application apparatuses 70. [ In addition, since switching of the application device 70 is substantially unnecessary, time and labor can be reduced. Since the application portion 82 and the switching portion 76 shared by the two types of hot-melt adhesives are substantially heated when the hot-melt adhesive is switched, the previous hot-melt adhesive is applied to the application portion 82, 76 can be reduced. As a result, it is possible to avoid a situation in which the hot-melt adhesive prior to curing is slightly peeled off and used as an impurity in the hot-melt adhesive after conversion at the time of using the hot-melt adhesive after conversion. As a result, it is possible to prevent the phenomenon that the functions and characteristics of the article due to impurities are lowered, defective products are generated, and the production yield is lowered. As described above, in the present applicator and the present manufacturing method using the applicator, when applying one of the two types of hot-melt adhesives to a material, by using a common applicator, a space / time The function and property of the absorbent article can be maintained by suppressing the mixing of impurities into the hot melt adhesive while suppressing labor.

In the manufacturing line of Figs. 3 and 7, when a device related to manufacturing such as the application device 70 is attached to the surface side of the wall surface, in the application device 70 as shown in Fig. 4, the first supply part 71 -1, the second supply portion 71-2 and the switching portion 76 are disposed on the back side of the wall surface 99, and the application portion 82 is disposed on the surface side of the wall surface. As a result, the distance between the device on the front surface side of the wall surface 99 and the device on the back surface side is close to each other, so that the adjustment can be made easily, thereby reducing the time and labor in switching the hot melt adhesive. Further, space is saved because the back side of the wall surface 99 is used for installation of the device.

The first and second hot melt adhesives may have mutually different melting points. In the first coating step, each of the devices related to the application of the first hot-melt adhesive is heated by the respective heating portions at a predetermined temperature higher than the melting point based on the melting point of the first hot-melt adhesive. In the second coating step, each of the devices related to the application of the second hot-melt adhesive is heated by the respective heating portions at a predetermined temperature higher than the melting point based on the melting point of the second hot-melt adhesive. As a result, it is possible to prevent the hot-melt adhesive from being hardened or adhered to a tube or a valve in the course of movement even when the melting point of the hot-melt adhesive is changed by switching the hot-melt adhesive, It is possible to maintain the functions and characteristics of the optical disc 1. It is possible to select a hot-melt adhesive suitable for maintaining the functions and characteristics of the absorbent article 1, and to increase the degree of freedom of selection of the hot-melt adhesive and the degree of freedom of selection of the material . The predetermined temperature is a temperature at which each adhesive in each device is melted.

Each of the first coating step and the second coating step may include an intermittent coating step of intermittently applying a hot-melt adhesive to the material. In the intermittent application step of the first application step and the intermittent application step of the second application step, a common intermittent application control is performed by the application device. In this manufacturing method, in the first coating step and the second coating step, the apparatus for performing intermittent application, that is, the coating apparatus is common, and since the operation for performing the intermittent application, that is, the operation of the application unit is common, It is possible to easily adjust the application device at the time of switching the hot-melt adhesive, as compared with the case where each of the application devices having different devices and controls is used.

In the application portion 82, the application nozzle 84 may be a nozzle for contact-type application. In this case, in the first coating step, the first hot-melt adhesive is applied to the first material by the application nozzle 84 for contact application. In the second coating step, the second hot-melt adhesive is applied to the second material by the contact nozzle 84 for contact coating. In this manufacturing method, since the hot melt adhesive is applied to the material by the application nozzle 84 for contact application, it is possible to reduce the influence of the adhesion residue of the hot melt adhesive on the nozzle, which may occur in the application nozzle for non- have. As a result, the hot melt adhesive can be easily changed, and time and labor can be suppressed.

(Second Embodiment)

Next, a method of manufacturing the absorbent article and a coating apparatus according to the second embodiment will be described. In the present embodiment, a disposable diaper of a tape type (open type) is used as an example of the absorbent article. Hereinafter, differences from the above-described embodiment will be mainly described.

Fig. 6 is a view showing the absorbent article 51 (disposable diaper) according to the present embodiment, specifically showing a plan view in a state in which the absorbent article 51 is expanded and opened. The absorbent article 51 is provided with an isometric waist region S2 corresponding to the waist of the wearer's back side and a back waist circumference region S1 corresponding to the waist circumference of the wearer's back side in the longitudinal direction L, And a crotch region S3 corresponding to the crotch of the wearer and located between the back side waist region S1 and the back side waist region S2. The absorbent article 51 has a structure in which a fastening tape (described later) at both ends in the width direction W of the back side waist region S2 and a target tape (described later) at the center in the width direction W of the back waist region S1 So that they are mounted as diapers. The direction toward the back side waist region S2 in the longitudinal direction L and the direction toward the back waist region S1 are referred to as the back side direction and the front side direction, respectively. The absorbent article 51 includes a liquid permeable topsheet 52 positioned on the skin side, a liquid impervious backsheet 53 located on the non-skin side, a topsheet 52 and a backsheet 53, And an absorber 54 of liquid-absorbing property and liquid-retaining property. The absorbent body 54 and the topsheet 52 and the absorbent body 54 and the backsheet 53 are bonded together by an adhesive agent and the topsheet 52 and the backsheet 53 are bonded to each other by adhesive . The absorbent article 51 further includes a pair of leakage preventing walls 55 and 55, leg elastic members 56 and 56, an external sheet 59, a stretching member 61, A pair of projections 57 and 57 including a projecting portion 57a, a target tape 62 and a pair of projections 58 and 58. [ The outer sheet 59 and the back sheet 53, the leakage preventing wall 55 and the topsheet 52 and the outer sheet 59 and the stretchable member 61 and the outer sheet 59 are bonded together by an adhesive. For each of the materials described above, a known material generally used in the absorbent article 51 is used. As the adhesive for joining the respective materials together, a known material generally used in the absorbent article 51 is used, but at least one of the above-mentioned hot-melt adhesives is used.

Next, a method of manufacturing the absorbent article 51 will be described. Fig. 7 is a schematic diagram showing a configuration of an apparatus 600 for manufacturing an absorbent article according to the embodiment. The present manufacturing apparatus 600 includes a first forming unit 600A to a fourth forming unit 600D and a control device 600X exemplified by a computer. The method of manufacturing the absorbent article using the manufacturing apparatus 600 includes a fourth forming step performed by the first forming step to the fourth forming unit 600D executed by the first forming unit 600A. The control device 600X controls the operation of the manufacturing apparatus 600. [

In the first forming step, the rotary drum 411 is rotated in the fiber laminating apparatus 410 and the fiber lamination material supplied from the material feeder 413 is fed into the groove communicating with the negative pressure chamber 411N of the pattern plate 412 And a fiber laminate is formed in the groove. Next, when the pattern plate 412 reaches the static pressure chamber 411P together with the fiber laminate, the fiber laminate is released from the pattern plate 412. [ On the other hand, the lower layer tissue sheet LT of the continuous sheet type is fed from the roll WR1 to the conveyor belt 415. [ On one side of the lower layer tissue sheet LT, a hot-melt adhesive is applied by a coating device 601. Then, the fiber laminate is pushed on one surface of the lower layer tissue sheet LT on the conveying belt 415 through a hot-melt adhesive to form a first semi-finished product P21. The first semi-finished product P21 is conveyed by the conveying belt 415 while being sucked by the action device 416. [ Next, the upper-layer tissue sheet UT in the form of a continuous sheet is fed from the roll WR2 to the conveyor belt 415. [ On one side of the upper-layer tissue sheet UT, a hot-melt adhesive is applied by a coating device 602. One side of the upper layer tissue sheet UT is pushed against the first semi-finished product P21 on the conveying belt 415 through a hot-melt adhesive to form a second semi-finished product P22. The second semi-finished product P22 is then cut into the absorber 54 by the cutting device 420 to form the third semi-finished product P23 which is the absorber 54. Next, The third semi-finished product P23 is supplied to the bonding rolls 460 and 461 via the conveying rolls 421. [

Next, in the second forming step, the continuous top sheet TS is fed from the roll WR3 to the bonding roll 430. [ On one surface of the topsheet TS, a hot-melt adhesive is applied by a coating device 603. On the other hand, a pair of continuous sheet-like leakage preventing wall sheets GS and GS are supplied from the rolls WR4 and WR5 to the joining roll 430. [ The surfaces of the topsheet TS on which the hot melt adhesive is applied are pushed against the pair of the leakage preventing wall sheets GS and GS to form a pair of leakage preventing wall sheets GS, (TS) is formed. Next, a hot-melt adhesive is applied to the other surface of the topsheet TS opposite to the surface to which the leakage-preventing wall sheets GS and GS are bonded by the applying device 604, and the bonding rolls 460 and 461 .

Next, in the third forming step, the continuous sheet type back sheet BS is fed from the roll WR6 to the bonding roll 440. [ On the other hand, a continuous sheet type outer sheet ES (the leg portion stretching member 56, the projections 57 and 58, and the target tape 62 have been added) is fed from the roll WR7 to the bonding roll 440. On one side of the outer sheet ES, a hot-melt adhesive is applied by a coating device 605. [ The backsheet BS is then pressed against the surface of the outer sheet ES coated with the hot-melt adhesive to form the backsheet BS bonded with the outer sheet ES. Next, the backsheet BS is coated with a hot-melt adhesive for the absorbent body 54 by a coating device 606 on the other surface opposite to the surface to which the outer sheet ES is bonded, The hot melt adhesive for the stretchable member 61 is applied by the adhesive layer 607 to the bonding roll 460. Next, a continuous sheet-like elastic member sheet EW is fed from the roll WR8 to the cutting device 450 and cut into a predetermined shape. The stretching member 61 serving as a cutting piece is transmitted to the width extending and attaching device 451 and both ends are stretched in the width direction by the width extending and attaching device 451. The backing sheet BS on the joining roll 460, In the stretched state. The backsheet BS to which the elastic member 61 is attached moves on the joining roll 460 to the joining roll 461. [

Subsequently, in the fourth forming step, the third semi-finished product P23 in the first forming step, the topsheet TS in the second forming step, and the backsheet BS in the third forming step are bonded together by a pair of joints Are compressed in the thickness direction by the rolls 460 and 461, and are bonded. Thereby, the continuum P24 of the absorbent article 51 is formed. The continuous body P24 of the absorbent article 51 is cut by the cutting device 470 to form the absorbent article P25 or the absorbent article 51. [ The packaging process is omitted. Thus, the packaged absorbent article 51 is produced.

In the manufacturing method of the absorbent article 51 described above, at least one of the application devices 601 to 607 in the manufacturing device 600 shown in FIG. 7 is the application device 70 shown in FIG. to be.

Next, a method for manufacturing the absorbent article 51 using the above-described method of switching the hot-melt adhesive using the application device 70 will be described. This manufacturing method is the same as the manufacturing method of the absorbent article 1 using the method of switching the hot-melt adhesive using the application device 70 in the first embodiment. Therefore, description of the present manufacturing method will be omitted. This manufacturing method can also exhibit the same operational effects as the manufacturing method of the absorbent article 1 using the method of switching the hot-melt adhesive using the application device 70 in the first embodiment.

The absorbent article of the present invention is not limited to the above-described embodiments, and can be appropriately combined or changed within the scope of the present invention.

70: Coating device 71-1: First supply part
71-2: second supply unit 76:
82:

Claims (8)

A plurality of types of absorbent articles having different hot melt adhesives corresponding to at least one of the plurality of materials are adhered to each other by a hot melt adhesive and a plurality of materials constituting the absorbent article are adhered to each other by a single production line As a method for producing an absorbent article,
The coating device includes:
A switching unit that has a first receiving port, a second receiving port, and a delivery port, for switching a receiving port communicating with the discharging port from one of the first receiving port and the second receiving port to the other;
A first supply section for supplying the first hot melt adhesive to the first receiving port,
A second supply section for supplying a second hot-melt adhesive different from the first hot-melt adhesive to the second receiving port,
A first hot melt adhesive agent or a second hot melt adhesive agent that is connected to the delivery port and is dispensed from the delivery port,
Respectively,
In the above manufacturing method,
Wherein in the production of the first absorbent article of the plurality of types of absorbent articles, the first supply portion, the switching portion, and the application portion are heated, the first receiving port of the switching portion is communicated with the delivery port, A first coating step of applying the first hot-melt adhesive to the first material by a first coating step,
In the production of the second absorbent article of the plurality of types of absorbent articles, the second supply portion, the switching portion and the application portion are heated, the second receiving port of the switching portion is communicated with the delivery port, A second coating step of applying the second hot-melt adhesive to the second material
Wherein the absorbent article has an absorbent core. The method according to claim 1, wherein the first hot melt adhesive and the second hot melt adhesive have melting points different from each other,
In the first coating step, the first supplying portion, the switching portion, and the applying portion are heated at a temperature higher than the melting point based on the melting point of the first hot-melt adhesive,
Wherein the second supplying portion, the switching portion, and the applying portion are heated at a temperature higher than the melting point based on a melting point of the second hot-melt adhesive in the second applying step. The method of manufacturing an absorbent article according to claim 1 or 2, wherein in the second application step, the second supply part is heated before the first application step. The apparatus according to claim 1 or 2, wherein the apparatus of the production line is attached to the surface side of the wall surface,
Wherein the first supply portion, the second supply portion, and the switching portion are disposed on a back surface side of the wall surface, and the application portion is disposed on a surface side of the wall surface. 3. The apparatus according to claim 1 or 2, wherein each of the first supply portion and the second supply portion includes an adhesive storage tank and an adhesive supply pipe connecting the adhesive storage tank and the switch portion,
Wherein the applying section includes an application nozzle and an adhesive delivery pipe for connecting the application nozzle and the switching section,
The volume of the flow passage through which the first hot-melt adhesive and the second hot-melt adhesive in the switching portion, the adhesive dispensing tube, and the application nozzle communicates with the first hot-melt adhesive in the first hot- The volume of the flow path through which either the adhesive or the second hot-melt adhesive flows exclusively,
Wherein the second coating step comprises extruding the first hot melt adhesive in the switching portion, the adhesive dispensing tube and the application nozzle with the second hot melt adhesive supplied from the adhesive supply pipe of the second supply portion, And a substitution step of replacing the adhesive with a hot-melt adhesive. The method according to claim 1 or 2, wherein each of the first coating step and the second coating step includes an intermittent coating step of intermittently applying the hot-melt adhesive to the material,
Wherein in the intermittent application step of the first application step and the intermittent application step of the second application step, a common intermittent application control is performed by the application device. The coating apparatus according to any one of claims 1 to 3, wherein the coating section includes a coating nozzle for contact coating,
Wherein the first coating step is a step of applying the first hot-melt adhesive to the first material with the application nozzle for the contact coating,
Wherein the second coating step is a step of applying the second hot-melt adhesive to the second material by contact with an application nozzle for the contact coating. A switching unit that has a first receiving port, a second receiving port, and a delivery port, for switching a receiving port communicating with the discharging port from one of the first receiving port and the second receiving port to the other;
A first supply section for supplying the first hot melt adhesive to the first receiving port,
A second supply section for supplying a second hot-melt adhesive different from the first hot-melt adhesive to the second receiving port,
A first hot melt adhesive agent or a second hot melt adhesive agent that is connected to the delivery port and is dispensed from the delivery port,
And an adhesive agent applying unit.

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