KR102047580B1 - Liquid application device and liquid application method - Google Patents

Liquid application device and liquid application method Download PDF

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Publication number
KR102047580B1
KR102047580B1 KR1020157021781A KR20157021781A KR102047580B1 KR 102047580 B1 KR102047580 B1 KR 102047580B1 KR 1020157021781 A KR1020157021781 A KR 1020157021781A KR 20157021781 A KR20157021781 A KR 20157021781A KR 102047580 B1 KR102047580 B1 KR 102047580B1
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South Korea
Prior art keywords
suction
web
liquid
liquid application
drum
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KR1020157021781A
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Korean (ko)
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KR20160033647A (en
Inventor
유이치 스즈키
고타 오치
다카시 오노즈카
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유니챰 가부시키가이샤
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
    • A61F2013/15707—
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing

Abstract

This invention relates to the liquid application apparatus (1,100) which applies the liquid which has a viscosity of the range of 0.05-4 Pa.s with respect to the web 3 continuously conveyed used for manufacture of an absorbent article. . The liquid application device 1, 100 includes a tank 11 containing liquid, a liquid application nozzle 13 that applies liquid to one side 3ff of the web 3, and a liquid in the tank. Suction devices 5, 105 having a pump 17 for supplying the liquid application nozzle 13 through the tube 15 and the surfaces 5f, 105f facing the other side 3fs of the web 3. ). The surfaces 5f and 105f of the suction devices 5 and 105 include at least the suction area AS for sucking the web 3.

Figure R1020157021781

Description

LIQUID APPLICATION DEVICE AND LIQUID APPLICATION METHOD}

The present invention relates to a liquid application device and a liquid application method for applying a liquid to a web being conveyed.

Patent Document 1 discloses a method of applying a low-viscosity liquid such as a lotion, a softening agent, a water-soluble antimicrobial agent, etc. to a sheet constituting the absorbent article in order to improve the feel, feel, and the like of absorbent articles such as paper diapers and sanitary napkins. have.

Moreover, patent document 2 discloses the manufacturing method of the absorbent article which continuously manufactures the absorbent article to which the liquid (skin care agent) was applied to the web (constitution sheet) conveyed.

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-229959 Patent Document 2: Japanese Patent Application Laid-Open No. 2011-143240

When the web is transported, wrinkles and sagging may occur due to its elasticity, and as a result, the web may meander. In addition, the liquid applied to the web may not fully be impregnated sufficiently in the thickness direction of the web.

However, in patent documents 1 and 2, nothing is mentioned about this.

Accordingly, an object of the present invention is a liquid capable of sufficiently impregnating a low-viscosity liquid applied to a web while suppressing meandering of the web by reducing occurrence of wrinkles and sagging of the web during conveyance of the web. An application device and a liquid application method are provided.

In order to solve the said subject, according to this invention,

As a liquid application device which applies the liquid which has a viscosity of the range of 0.05-4 Pa.s with respect to the web continuously conveyed used for manufacture of an absorbent article,

A tank containing the liquid,

A liquid application nozzle for applying said liquid to one side of said web,

A pump for supplying the liquid in the tank to the liquid application nozzle through a tube;

Suction device having a surface facing the other side of the web

And

The surface of the suction device includes at least a suction area for sucking the web.

A liquid application device is provided.

Moreover, in order to solve the said subject, according to this invention,

As a liquid application method which applies the liquid which has a viscosity of the range of 0.05-4 Pa.s with respect to the web continuously conveyed used for manufacture of an absorbent article,

A tank containing the liquid,

A liquid application nozzle for applying said liquid to one side of said web,

A pump for supplying the liquid in the tank to the liquid application nozzle through a tube;

Suction device having a surface facing the other side of the web

In addition,

The surface of the suction device includes at least a suction area for sucking the web.

Preparing a liquid application device,

Sucking the web in the suction area by the suction device;

Process of applying liquid to the web

Containing

A liquid application method is provided.

According to the present invention, a liquid application apparatus capable of sufficiently impregnating a low viscosity liquid applied to a web while suppressing meandering of the web by reducing occurrence of wrinkles and sagging of the web during conveyance of the web; A liquid application method is provided.

1 is a schematic view of a liquid application device according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of FIG. 1 in the periphery of the suction drum. FIG.
3 is a cross-sectional view taken along the line III-III of FIG. 2.
4 is a diagram showing the outer periphery of the suction drum, the inlet roll, and the outlet roll of the liquid application device according to the first embodiment of the present invention.
5 is a partial cross-sectional schematic diagram of a liquid application device according to a second embodiment of the present invention.
6 is a partial cross-sectional schematic view of a liquid application device according to a variant of the second embodiment of the invention, similar to FIG. 5;

(First embodiment)

Now, with reference to FIGS. 1-4, the liquid application apparatus 1 of 1st Embodiment of this invention is demonstrated.

1 is a schematic diagram of a liquid application device 1 according to a first embodiment of the present invention. The liquid application device 1 applies a liquid of low viscosity to one side 3ff of the web 3 being conveyed. In 1st Embodiment, the web 3 is comprised from the top sheet of a disposable diaper or sanitary napkin with the bonding sheet | seat in which the absorber was bonded at regular intervals in the conveyance direction MD. In another embodiment, the web 3 is a product, semifinished product or material of an absorbent article. The absorbent article includes paper diapers, sanitary napkins, and the like.

As shown in FIG. 1, the liquid application device 1 includes a suction drum 5 (corresponding to a suction device). The suction drum 5 has a surface 5f that faces the other surface 3fs of the web 3. In the first embodiment, the web 3 is sucked by the surface 5f of the suction drum 5, and a liquid is applied on the surface 5f of the suction drum 5. The structure and action of the suction drum 5 will be described later in detail.

In the first embodiment, the liquid application device 1 further includes an inlet roll 7a and an outlet roll 7b, which are, for example, free rolls having no drive source. The web 3 is guided to the suction drum 5 by the inlet roll 7a, specifically onto the surface 5f of the suction drum 5, and further by the outlet roll 7b. Guided by.

As shown in FIG. 1, the liquid applying apparatus 1 includes a tank 11 containing liquid and a nozzle 13 (corresponding to a liquid applying nozzle) that applies the liquid to the sheet 3. The liquid application device 1 also includes a pump 17 for supplying the liquid contained in the tank 11 to the nozzle 13 through the tube 15. The supply amount of the pump 17 can be changed. The tank 11 is arranged at a position higher than the pump 17. As a result, the liquid in the tank 11 reaches the pump 17 by the weight of the liquid. In addition, a filter 19 for removing impurities mixed in the liquid is disposed in the tube 15 between the tank 11 and the pump 17.

The liquid level meter 21 is disposed in the portion of the tube 15 between the pump 17 and the nozzle 13. The liquid meter 21 detects the amount of liquid flowing through the tube 15, that is, the amount of liquid actually applied to the sheet 3. Thus, the amount of liquid actually applied to the sheet 3 can be easily detected.

On the other hand, in the first embodiment, the amount of liquid supplied from the liquid application device 1 to the sheet 3 is quite small, and is about 10 ml / minute. For this reason, the liquid flow meter 21 used by 1st Embodiment is a Coriolis flowmeter. Coriolis flowmeters are suitable for measuring such small amounts of liquid. However, in other embodiments, the liquid meter 21 is in a different format.

A Coriolis flowmeter is a flowmeter using the principle of the Coriolis force. That is, when the tube is vibrated while flowing the liquid to be measured in a U-shaped or straight tube, for example, deformation occurs in the tube. The magnitude of this deformation depends on the flow rate of the liquid flowing through the tube. Therefore, by detecting the magnitude of deformation of the tube, the liquid flow rate can be detected.

In the first embodiment, the nozzle 13 includes a liquid jet passage (not shown), a pneumatically driven nozzle valve (not shown) that opens or closes the liquid jet passage, and an air chamber (not shown). ) Is provided therein. That is, when air pressure is applied to the air chamber of the nozzle 13, a nozzle valve is opened and a liquid is ejected from a liquid flow path. On the other hand, when the application of air pressure to the air chamber is stopped, the nozzle valve is closed, and the ejection of the liquid is stopped.

The liquid application device 1 also has a first compressor 23. The air chamber of the nozzle 13 and the first compressor 23 are connected via the first air tube 25. In this example, the solenoid valve 27 for opening / closing the nozzle valve is disposed in the first air tube 25 between the nozzle 13 and the first compressor 23. When this nozzle valve opening / closing solenoid valve 27 is opened, air pressure is applied to the nozzle 13, and a nozzle valve is opened. When the nozzle valve opening and closing solenoid valve 27 is closed, the nozzle valve is closed.

In addition, the nozzle 13 communicates with or adjacent to the liquid flow passage, and includes an air flow passage (not shown).

The liquid application device 1 also has a second compressor 29. The air flow path of the nozzle 13 is connected to the second compressor 29 via the second air tube 31. A second solenoid valve 33 and a regulator 35 for adjusting the air pressure in the second air tube 31 are attached to the second air tube 31. When the solenoid valve 33 is opened, compressed air is blown out from the air flow path, and therefore the liquid ejected from the liquid flow path through the ejection opening 13o is atomized and applied to the seat 3. When the solenoid valve 33 is closed, supply of compressed air to an air flow path will stop.

In another embodiment, liquid is ejected from the nozzle 13 without using compressed air. In another embodiment, the liquid is applied to the web 3, for example by means of a brush or roller.

In the first embodiment, one jet port 13o is formed in the nozzle 13, and the jet port 13o is located at the center of the suction drum 5 and further, one surface 3ff of the web 3. Is oriented perpendicular to. The liquid ejected from the jet port 13o is diffused into a conical shape with the jet port 13o as a vertex, and is applied to one surface 3ff of the web 3 with a constant area. In order to change the application range of the liquid to the web 3, especially the width direction CD (FIG. 3) of the web orthogonal to the conveyance direction MD using the existing nozzle 13, the nozzle ( The distance between the ejection opening 13o of 13) and one side 3ff of the web 3 is changed. In addition, in order to extend the application range of the conveyance direction MD of the liquid to the web 3, the application time of a liquid is lengthened.

In another embodiment, in order to widen the application range of the liquid in the width direction CD (FIG. 3) of the web, the nozzle has a plurality of jet ports aligned in the width direction CD of the web 3 (FIG. 3). Formed. Thereby, the application range of the liquid of the width direction CD (FIG. 3) of the web can be changed, without changing the distance from the surface 5f of the suction drum 5 of the nozzle 13. As shown in FIG.

In 1st Embodiment, the liquid has the viscosity of the range of 0.05-4 Pa.s at least at the time of applying to the sheet | seat 3. Preferably, a liquid has the viscosity of the range of 0.05-4 Pa.s in 20-25 degreeC and 1 atmosphere. In another embodiment, the liquid is a liquid having a higher viscosity than this. In another embodiment, the liquid is a liquid having a lower viscosity than this.

In addition, the viscosity of a liquid is detected as follows. At a desired temperature, the kinematic viscosity is detected by a Canon-Penske viscometer in accordance with JIS K 2283, and the density is detected by a vibratory density meter in accordance with JIS K 2249. From the said result, the viscosity in the temperature is computed using the following formula | equation.

Viscosity (㎩ · s) = Kinematic Viscosity (㎡ / s) × Density (㎏ / ㎥)

In the first embodiment, the liquid is, for example, a petroleum hydrocarbon, animal or vegetable fat, animal or vegetable wax, fatty acid ester compound, alkyl ethoxylate, fatty acid ester ethoxylate, fatty alcohol, polysiloxane, or the like. In another embodiment, the liquid is a pH adjuster, antibacterial, fragrance, fragrance or the like.

In the first embodiment, the liquid is from the liquid application device 1 to the web 3, for example, the web is a bonding sheet of the top sheet of the disposable diaper and the absorbent body, and the portion corresponding to the longitudinal center portion of the disposable diaper. , It is applied intermittently. However, in other embodiments, the liquid is applied intermittently to other portions of the disposable diaper, or any portion of another absorbent article. In another embodiment, the liquid is applied to the web 3 continuously in the conveying direction MD from the liquid application device 1.

The liquid application device 1 also has a controller 37. The controller 37 is comprised of a computer having, for example, a CPU (microprocessor), a memory, an input port, and an output port. The liquid meter 21 and the like are connected to the input port of the controller 37. The pump 17, the solenoid valve 27 for opening / closing the nozzle valve, and the like are connected to the output port of the controller 37. The pump 17 and the solenoid valve 27 are controlled based on the signal from the controller 37. In addition, the conveyance operation | movement of the web 3 is controlled by the controller 37, Moreover, the intermittent injection of the liquid by the nozzle 13 and the opening of the solenoid valve 27 for opening / closing a nozzle valve specifically, And timing of closure. As a result, the liquid can be applied to a desired location on one side 3ff of the web 3.

FIG. 2 is an enlarged view of FIG. 1 around the suction drum 5, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. The suction drum 5 includes a rotating portion 5r which rotates together with the drum shaft 5ds and a non-rotating portion 5s which is located inside the suction drum 5, and these are made of metal or the like. It is made of hard material. These rotating parts 5r and the non-rotating parts 5s extend in the rotational direction of the suction drum 5, respectively. The drum shaft 5ds is connected to a rotation drive device (not shown) which is, for example, a motor at one end thereof (not shown), and rotates the rotary part 5r of the suction drum 5 by the driving force. Can be driven. In addition, in 1st Embodiment, with respect to the suction drum 5, the radial direction RD means the direction orthogonal to the extending direction of the drum shaft 5ds.

As shown in FIG. 3, the rotating part 5r contains the side part 5rs, the outer periphery base part 5rc, and the mesh part 5rm. The side portions 5rs constituting one side of the suction drum 5 are connected to each other 5dse of the drum shaft 5ds by a connecting means that is, for example, a bolt. And the outer peripheral base part 5rc which comprises the outer peripheral part of the suction drum 5 with the mesh part 5rm is connected with the radially outermost part of the side part 5rs, for example by the connection means which is a bolt. . In the first embodiment, the mesh portion 5rm is formed by stacking a plurality of sheets of mesh shape, which are meshes made of metal, resin material, or the like, for example.

As shown in FIG. 3, the non-rotation part 5s contains the hollow shaft 5ss and the side wall 5sw. As for the hollow shaft 5ss, the drum shaft 5ds is inserted in the hollow part substantially coaxially. The bearing 5br is provided between the outer peripheral surface of the drum shaft 5ds and the inner peripheral surface of the hollow shaft 5ss. The hollow shaft 5ss is fixed to, for example, a wall (not shown) of the facility so as not to rotate and to support the load of the suction drum 5 as a whole.

The hollow shaft 5ss has a side wall 5sw that extends in the radial direction RD of the suction drum 5 between the outer surface of the hollow shaft 5ss and the inner surface of the outer base portion 5rc on its outer peripheral surface. It is connected by the connecting means which is a bolt, for example. In the radially outermost part of the side wall 5sw, the ring-shaped body 5sr which consists of felt etc. which contact | connects the inner peripheral surface of the outer peripheral base part 5rc is attached. Since the ring-shaped body 5sr extends continuously in the rotational direction of the suction drum 5, it has an annular shape. By the ring-shaped body 5sr, the sliding resistance between these is reduced while ensuring a certain airtightness between the rotating outer peripheral base part 5rc and the non-rotating side wall 5sw. The material of the ring-shaped body 5sr is not limited to the felt as long as it exhibits the above functions, and may be other materials.

By this structure, the hollow part 5h defined by the hollow shaft 5ss, the side wall 5sw, the ring-shaped body 5sr, and the outer periphery base part 5rc is defined in the suction drum 5 inside. (劃定)

As illustrated in FIG. 3, an exhaust hole 5swv is formed in the side wall 5sw of the suction drum 5, and one end of the duct 41 is the suction drum 5 in the exhaust hole 5swv. Is connected to. As a result, the inside of the duct 41 communicates with the hollow portion 5h. Moreover, the other end of the duct 41 is connected with the exhaust pump (not shown) which discharges the air inside the hollow part 5h toward the direction F. As shown in FIG. In the first embodiment, one duct 41 and one exhaust pump are used. However, with one exhaust pump, when the suction amount of air does not reach the desired suction amount, a plurality of exhaust holes 5swv are formed in the side wall 5sw, and a plurality of exhaust pumps are respectively formed. By connecting with the suction drum 5 via, the suction amount can be increased.

On the other hand, in 1st Embodiment, many through-holes 5rcp which penetrate with respect to the inner peripheral surface from the outer peripheral surface of the outer peripheral base part 5rc are formed in the outer peripheral base part 5rc. The through-hole 5rcp is formed so that it may distribute substantially uniformly on the surface of the outer periphery base part 5rc. On the other hand, in Fig. 3, although the through hole 5rcp formed in the inner surface of the outer circumferential base portion 5rc is shown, only a part of them is shown in view of the viewability. And as mentioned above, the mesh part 5rm comprised from the several mesh-shaped sheet | seat can pass air. Therefore, the hollow portion 5h communicates with the outside of the suction drum 5.

With the above configuration, the exhaust pump (not shown) discharges the air of the hollow portion 5h, while the hollow portion 5h is located on the mesh portion 5rm from the outside of the suction drum 5. Air is introduced through the web 3, the mesh portion 5rm, and the through hole 5rcp of the outer circumferential base portion 5rc.

On the other hand, in the first embodiment, the surface 5f of the suction drum 5 facing the other surface 3fs of the web 3 has the mesh portion 5rm by the above-described configuration of the suction drum 5. ) Outer surface.

In addition, as shown in FIG. 2 and FIG. 3, in the first embodiment, the suction drum 5 has a partition contacting a part of the inner surface of the outer circumferential base portion 5rc inside the hollow portion 5h ( 43 is provided, and the partition 43 is attached to the hollow shaft 5ss or the side wall 5sw by a jig (not shown). The contact part of the partition 43 and the inner surface of the outer periphery base part 5rc is comprised from felt similar to the ring-like body 5sr, for example by felt. The partition 43 prevents intake air from the outside of the suction drum 5 through the through hole 5rcp of the outer circumferential base portion 5rc in the contact portion.

As the partition 43 is provided, as shown in FIG. 2, the surface 5f of the suction drum 5 sucks the web 3, which is a length region along the outer circumference of the suction drum 5. Suction area | region AS and the non-suction area | region AN which do not suck | suck the web 3 are included. In another embodiment, the partition 43 is not provided in the suction drum 5, and the surface 5f of the suction drum 5 is a suction area AS whose entire circumference sucks the web 3. Furthermore, it does not include the non-absorption area AN.

Therefore, in the first embodiment, the suction drum 5 includes the suction region AS that the surface 5f opposite to the one surface 3ff on which the liquid is applied and the other surface 3fs on the opposite side is included. In the web 3 is sucked. As mentioned above, the through hole 5rcp is formed so that it may distribute substantially uniformly on the surface of the outer periphery base part 5rc. And since the mesh part 5rm of the structure mentioned above is formed in the outer surface of the suction drum 5, the path | route of the intake air from the exterior of the suction drum 5 to each through hole 5rcp is various. Forked. Therefore, in the surface 5f, the part of the web 3 located in the suction area | region AS can be sucked with a substantially uniform suction force irrespective of the position.

By the structure of the suction drum 5 mentioned above, the web 3 is attracted to the surface 5f and is hold | maintained by being attracted by the suction drum 5. As a result, the web 3 is conveyed with the rotation of the suction drum 5, and is conveyed by the suction drum 5 in the liquid application device 1 of the first embodiment.

According to the liquid application device 1 of the first embodiment, the following effects can be obtained.

(1) In 1st Embodiment, the part of the web 3 located in the suction area | region AS of the surface 5f of the suction drum 5 is sucked with a substantially uniform suction force as a whole, and the surface 5f is carried out. Conveyed while being kept on. As a result, at the time of conveyance of the web 3, generation | occurrence | production of the wrinkles and slack of the web 3 is reduced, and also meandering of the web 3 can be suppressed.

(2) By sucking the liquid applied to one side 3ff of the web 3 from the other side 3fs of the web 3, one side 3ff of the inside of the web 3 is drawn. It can be moved from the side to the other surface 3fs side. As a result, the liquid applied to the web 3 can be sufficiently impregnated inside the web 3. On the other hand, in order to fully exhibit this effect, it is preferable that the air permeability of the web 3 is high. The web 3 of the first embodiment is a bonding sheet of the top sheet and the absorber as described above, and generally contains no low-permeability material such as a plastic film contained in a back sheet of the absorbent article or the like. ) Is preferable because of its high air permeability.

(3) By sucking the web 3 from the thickness direction, the thickness of the web 3 located in the suction area AS of the surface 5f of the suction drum 5 can be made thin. As a result, the liquid applied from one surface 3ff of the web 3 tends to be impregnated in the thickness direction of the web 3.

(4) Since the liquid is applied to the web 3 without contacting the web 3 using the nozzle 13, even if the surface of the web 3 has irregularities, the application range of the nozzle 13 If inside, the liquid can be applied regardless of such irregularities.

In addition, as shown in FIG. 2, the suction area AS of the surface 5f of the suction drum 5 corresponds at least to the application range of the liquid by the nozzle 13 to the web 3. It is preferable to include liquid application area | region AA which is a length area | region along the outer periphery of (5). In the suction area AS of the surface 5f of the suction drum 5, since wrinkles and sagging are unlikely to occur in the web 3, the liquid is suitably applied to a desired range of one side 3ff of the web 3. This is because it is applicable. On the other hand, in another embodiment, the suction area AS does not include the liquid application area AA.

4 is a diagram showing the outer circumferences of the suction drum 5, the inlet roll 7a and the outlet roll 7b of the liquid application device according to the first embodiment of the present invention. 4 is a figure when the suction drum 5, the inlet roll 7a, and the outlet roll 7b are seen from the extension direction of the drum shaft 5ds of the suction drum 5. As shown in FIG.

As shown in Fig. 4, the suction drum 5 has a contact point between the common tangent L1 of the outer circumference of the suction drum 5 and the inlet roll 7a and the outer circumference of the suction drum 5 as the first point P1. (5) and the contact of the common tangent L2 of the outer periphery of the exit roll 7b, and the outer periphery of the suction drum 5 are set to 2nd point P2. At this time, the surface 5f of the suction drum 5 is from the first point P1 to the second point P2 along the outer circumference in the direction opposite to the rotational direction R of the suction drum 5. It is preferable to include the non-suction area | region AN (FIG. 2) which does not suck the web 3 in the length area | region APP along the surface 5f of (5). If the web 3 is attracted to the suction drum 5 between the suction drum 5 and the inlet roll 7a and / or between the suction drum 5 and the outlet roll 7b, the web ( This is because 3) may not be conveyed linearly and conveyance of the web 3 may not be normally performed. In another embodiment, the non-suction area AN (FIG. 2) is not included in the area APP.

On the other hand, the range of the non-suction area | region AN (FIG. 2) is defined by the dimension and position of the partition 43 in the circumferential direction of the suction drum 5. As shown in FIG.

1 and 2, the liquid application device 1 also preferably includes a cover 45 in which the suction drum 5 and the nozzle 13 are housed therein. The liquid sprayed from the nozzle 13 can be prevented from scattering to the surroundings, and also dust such as fiber debris from the outside of the liquid application device 1 can be prevented from adhering to the web 3. Because. In the first embodiment, the cover 45 has a box-shaped shape in which the four sides and the upper portion thereof are surrounded. In another embodiment, the liquid application device 1 does not include the cover 45.

In addition, it is preferable that the cover 45 is made of at least one surface of a transparent material so that the inside thereof can be visually recognized even during use. In the first embodiment, the front surface of the cover 45 is made of a transparent material.

As shown in FIG. 2, the cover 45 is provided with a first opening 45wf for carrying in and carrying out the web 3 therein. At this time, as shown in FIG. 2, it is preferable if the cover 45 is provided with the 2nd opening 45ws located in the perpendicular direction lower than the 1st opening 45wf. By forming the second opening 45ws separately from the first opening 45wf, more air can be introduced into the cover, and the intake efficiency from the outside of the suction drum 5 can be improved. In addition, since the second opening 45ws is positioned below the first opening 45wf in the vertical direction, dust such as fiber debris, which may be flying around the cover 45, is sucked into the cover 45. Can be suppressed. As long as the 2nd opening 45ws is perpendicularly lower than 1st opening 45wf, you may form in multiple numbers in arbitrary surfaces of the cover 45. As shown in FIG.

Moreover, in another embodiment, the filter (not shown) is provided in the 2nd opening 45ws so that dust, such as fiber waste, may not be sucked in. In another embodiment, the second opening 45ws is not formed in the cover 45.

(2nd embodiment)

Now, the liquid application apparatus 100 of 2nd Embodiment of this invention is demonstrated using FIG. On the other hand, the difference with 1st Embodiment is demonstrated especially about 2nd Embodiment. In addition, components other than the difference from 2nd Embodiment in 1st Embodiment are applicable to 2nd Embodiment, and those skilled in the art can combine these components arbitrarily within the obvious range.

5 is a partial cross-sectional schematic diagram of the liquid application device 100 according to the second embodiment of the present invention. In FIG. 5, since the mechanism which ejects liquid from the nozzle 13 is the same as that of FIG. 1, description is abbreviate | omitted.

The second embodiment mainly sucks the web 3 using the suction box 105 (corresponding to the suction device) instead of the suction drum 5 (Fig. 1 or the like). Different.

As shown in FIG. 5, the web 3 is conveyed in the conveyance direction MD by the conveying apparatus 107a, 107b on the surface 105f of the vertical direction upper side of the suction box 105.

In 2nd Embodiment, the suction box 105 is a rectangular parallelepiped shape, the main body part 105b which comprises the outer part of the suction box 105, and the hollow part located inside the main body part 105b. (105h).

As shown in FIG. 5, an exhaust hole 105bv is formed in the lower portion 105bl of the main body portion 105b of the suction box 105, and in the exhaust hole 105bv, the duct 41 is formed. One end is connected to the suction box 105. As a result, the inside of the duct 41 communicates with the hollow portion 105h. Moreover, the other end of the duct 41 is connected with the exhaust pump (not shown) which discharges the air of the hollow part 105h toward the direction F. As shown in FIG. In the second embodiment, as in the first embodiment, a plurality of exhaust holes 105bv are formed in the body portion 105b, and the plurality of exhaust pumps are connected to the suction box 105 via the duct 41, respectively. , The suction amount can be increased.

On the other hand, in 2nd Embodiment, many through-hole 105bp is formed in the upper part 105bu of the main-body part 105b. And the through-hole 105bp is formed so that it may distribute substantially uniformly over the whole surface of the upper part 105bu. And the mesh part 105m similar to the mesh part 5rm of 1st Embodiment is formed in the surface of the suction box 105 in the perpendicular direction upper side. And the mesh part 105m comprised from the several mesh-shaped sheet | seat can pass air. Therefore, the hollow portion 105h communicates with the outside of the suction box 105.

On the other hand, in 2nd Embodiment, by the structure of the suction box 105 mentioned above, the surface 105f of the suction box 105 facing the other surface 3fs of the web 3 is a mesh part ( 105m) outer surface.

By the above structure, as shown in FIG. 5, the surface 105f of the suction box 105 is a web region which is the length area | region of the copper surface 105f in the range in which the through hole 105bp is formed. And a suction area AS capable of sucking 3).

In the second embodiment, the web 3 is different from the first embodiment in that the web 3 slides on the surface 105f of the suction box 105. However, the suction box 105 is conveyed while being sucked with a substantially uniform suction force as a whole. As a result, at the time of conveyance of the web 3, the generation | occurrence | production of the wrinkles and slack of the web 3 is reduced similarly to 1st Embodiment, and also meandering of the web 3 can be suppressed.

Also in the second embodiment, similarly to the first embodiment, the suction region AS is at least a length region of the surface 105f of the suction box 105 and includes a liquid application region AA to which a liquid is applied. do. As a result, in the suction region AS of the surface 105f of the suction box 105, wrinkles and sagging are less likely to occur in the web 3, so that liquid is removed from one surface 3ff of the web 3. It can apply suitably to a desired range. In another embodiment, the suction area AS does not include the liquid application area AA.

(Variation)

A modification of the second embodiment of the present invention will now be described with reference to FIG. 6. FIG. 6 is a partial cross-sectional schematic diagram of a liquid application device 100 according to a variant of the second embodiment of the invention, similar to FIG. 5. In this variant, the liquid application device 100 also includes a mesh belt 109.

As shown in FIG. 6, the mesh belt 109 spans the pair of rollers 109a and 109b around the suction box 105. In the present modification, the mesh belt 109 is a breathable endless belt formed of a mesh-shaped sheet that is a mesh made of a material such as metal or resin, for example.

At least one of the pair of rollers 109a and 109b is a drive source, for example, a servo motor (not shown) so that the mesh belt 109 moves in the conveying direction MD on the surface 105f of the suction box 105. Rotational drive).

In the suction box 105 of this modification, the exhaust hole 105bv is formed in one side part 105bs of the main-body part 105b so that the mesh belt 109 and the duct (not shown) may not interfere. One end of the duct is connected to the exhaust hole 105bv. The other end of the duct is connected to an exhaust pump (not shown).

As shown in FIG. 6, the liquid application apparatus 100 of this modification is provided with the inlet roll 7a and the outlet roll 7b. The web 3 is guided onto the mesh belt 109 by the inlet roll 7a and further guided to the subsequent process by the outlet roll 7b.

The web 3 positioned on the mesh belt 109 is sucked by the suction box 105 in the suction area AS, thereby being adsorbed and held on the outer surface of the mesh belt 109. As a result, the web 3 is conveyed with the movement of the mesh belt 109, and is conveyed by the mesh belt 109 in the liquid application apparatus 100 of this modification.

In this modification, the part of the web 3 located on the suction area AS of the surface 105f of the suction box 105 is sucked with a substantially uniform suction force as a whole, whereby the outer surface of the mesh belt 109 Conveyed while being kept on. As a result, generation | occurrence | production of the wrinkles and slack in conveyance can be reduced, and also meandering of the web 3 can be suppressed.

On the other hand, all the features that can be understood by a person skilled in the art from the description of the specification, the drawings and the claims, even if these features are described in combination with respect to specific other features in the specification, these features are clearly Unless excluded, or unless the technical aspect is an impossible or meaningless combination, it is intended that the combination may be independently and in any combination with the other or a plurality of features disclosed herein.

As an example, the liquid application device 100 of the second embodiment does not include the cover 45 included in the liquid application device 1 of the first embodiment. However, the modified embodiment such that the liquid application device 100 of the second embodiment includes the cover 45 for accommodating the nozzle 13 and the suction box 105 therein is also included in the scope of the present invention. I shall do it.

The present invention is defined as follows.

(1) As a liquid application apparatus which applies the liquid which has a viscosity of the range of 0.05-4 Pa.s with respect to the web continuously conveyed used for manufacture of an absorbent article,

A tank containing the liquid,

A liquid application nozzle for applying said liquid to one side of said web,

A pump for supplying the liquid in the tank to the liquid application nozzle through a tube;

Suction device having a surface facing the other side of the web

And

The surface of the suction device includes at least a suction area for sucking the web.

Liquid application device.

(2) the suction region includes at least a liquid application region to which the liquid is applied;

The liquid application device described in (1).

(3) The suction device is a suction drum,

The surface of the suction device is an outer peripheral surface of the suction drum,

The web is sucked by the suction drum which is rotationally driven and conveyed together with the rotation of the suction drum.

The liquid application device as described in (1) or (2).

(4) an inlet roll for guiding the web to the suction drum, and an outlet roll for guiding the web from the suction drum to a subsequent process;

The surface of the suction device has a common tangent between the outer circumference of the suction drum and the inlet roll and a contact between the outer circumference of the suction drum and the common tangent of the suction drum and the outlet roll. When the contact point with the outer circumference of the suction drum is the second point, the ratio is such that the web is not sucked into the area from the first point to the second point along the outer circumference in the direction opposite to the rotation direction of the suction drum. Including suction area

The liquid application device described in (3).

(5) The suction device is a suction box,

The surface of the suction device is a surface above the vertical direction of the suction box,

The web is conveyed on the surface of the suction box while being sucked by the suction box.

The liquid application device as described in (1) or (2).

(6) further comprising a mesh belt hung around the suction box,

The web is conveyed with the movement of the mesh belt

The liquid application device described in (5).

(7) further comprising a cover in which the liquid application nozzle and the suction device are housed therein

The liquid application device in any one of (1)-(6).

(8) In the cover,

A first opening for carrying in and carrying out the web into the cover;

A second opening located below the first opening in a vertical direction is formed.

The liquid application device described in (7).

(9) The liquid is applied intermittently to the web

The liquid application device in any one of (1)-(8).

(10) As a liquid application method which applies the liquid which has a viscosity of the range of 0.05-4 Pa.s with respect to the web continuously conveyed used for manufacture of an absorbent article,

A tank containing the liquid,

A liquid application nozzle for applying said liquid to one side of said web,

A pump for supplying the liquid in the tank to the liquid application nozzle through a tube;

Suction device having a surface facing the other side of the web

In addition,

The surface of the suction device includes at least a suction area for sucking the web.

Preparing a liquid application device,

Sucking the web in the suction area by the suction device;

Process of applying liquid to the web

Containing

How to apply liquid.

1, 100: liquid application device 3: web
3ff: one side 3fs: other side
5: suction drum (suction unit) 5f: surface
11: tank 13: nozzle (liquid nozzle)
15: Tube 17: Pump
105: suction box (suction unit) 105f: surface
AS: Suction Zone

Claims (10)

As a liquid application apparatus which applies the liquid which has a viscosity of the range of 0.05-4 Pa.s with respect to the web continuously conveyed used for manufacture of an absorbent article,
A tank containing the liquid,
A liquid application nozzle for applying said liquid to one side of said web,
A pump for supplying the liquid in the tank to the liquid application nozzle through a tube;
Suction device having a surface facing the other side of the web
And
The surface of the suction device includes a suction area for sucking the web,
The liquid application device further includes a cover in which the liquid application nozzle and the suction device are accommodated,
The cover
A first opening for carrying in and carrying out the web into the cover;
And a second opening located below the first opening in a vertical direction. The liquid application apparatus according to claim 1, wherein the suction region includes a liquid application region to which the liquid is applied. The suction device according to claim 1 or 2, wherein the suction device is a suction drum,
The surface of the suction device is an outer circumferential surface of the suction drum,
And the web is sucked by the suction drum which is rotationally driven and conveyed with the rotation of the suction drum. The method of claim 3, further comprising: an inlet roll for guiding the web to the suction drum; an outlet roll for guiding the web from the suction drum to a subsequent process;
The surface of the suction device has a common tangent between the outer circumference of the suction drum and the inlet roll and a contact between the outer circumference of the suction drum and the common tangent of the suction drum and the outlet roll. When the contact point with the outer circumference of the suction drum is the second point, the non-suction which prevents the web from being sucked into the area from the first point to the second point along the outer circumference in the direction opposite to the rotational direction of the suction drum. Liquid application device comprising a region. The suction device according to claim 1 or 2, wherein the suction device is a suction box,
The surface of the suction device is a surface above the vertical direction of the suction box,
And the web is sucked by the suction box and conveyed on the surface of the suction box. 6. A mesh belt as claimed in claim 5, further comprising a mesh belt circumscribed around the suction box,
And the web is conveyed with the movement of the mesh belt. 3. Apparatus according to claim 1 or 2, wherein the liquid is applied intermittently to the web. As a liquid application method which applies the liquid which has a viscosity of the range of 0.05-4 Pa.s with respect to the web continuously conveyed used for manufacture of an absorbent article,
A tank containing the liquid,
A liquid application nozzle for applying said liquid to one side of said web,
A pump for supplying the liquid in the tank to the liquid application nozzle through a tube;
Suction device having a surface facing the other side of the web
And also
Preparing a liquid application device, wherein the surface of the suction device includes a suction area for sucking the web;
Sucking the web in the suction area by the suction device;
Process of applying liquid to the web
Including,
The liquid application device further includes a cover in which the liquid application nozzle and the suction device are accommodated,
The cover
A first opening for carrying in and carrying out the web into the cover;
And a second opening located below the first opening in a vertical direction. delete delete
KR1020157021781A 2013-07-22 2014-06-30 Liquid application device and liquid application method KR102047580B1 (en)

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TW201529051A (en) 2015-08-01
JP2015019927A (en) 2015-02-02
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IN2015DN00312A (en) 2015-06-12
WO2014192980A1 (en) 2014-12-04
KR20160033647A (en) 2016-03-28

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