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WO2014057895A1 - Dispositif et procédé d'application de corps liquide - Google Patents

Dispositif et procédé d'application de corps liquide Download PDF

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Publication number
WO2014057895A1
WO2014057895A1 PCT/JP2013/077161 JP2013077161W WO2014057895A1 WO 2014057895 A1 WO2014057895 A1 WO 2014057895A1 JP 2013077161 W JP2013077161 W JP 2013077161W WO 2014057895 A1 WO2014057895 A1 WO 2014057895A1
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WO
WIPO (PCT)
Prior art keywords
liquid
web
application
porous body
roll
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/077161
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English (en)
Japanese (ja)
Inventor
公太 越智
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
Original Assignee
Unicharm Corp
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Filing date
Publication date
Application filed by Unicharm Corp filed Critical Unicharm Corp
Publication of WO2014057895A1 publication Critical patent/WO2014057895A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs

Definitions

  • the present invention relates to a liquid application apparatus and a liquid application method for applying a liquid to a continuously conveyed web used for manufacturing an absorbent article.
  • a method of applying a low-viscosity liquid such as a lotion to a web constituting an absorbent article using a coating gun or a spray device is disclosed (see Patent Documents 1 and 2).
  • the web to be applied when the web to be applied is thin, the web includes a difference in local weight, or the web has an opening, It is not possible to control the degree of liquid escape (liquid passing through the web) and the degree of impregnation in the thickness direction of the web. As a result, liquid may accumulate on the surface of the web on the one hand, and liquid may escape to the back surface of the web on the other hand, which may cause the liquid to be stably applied to the web. On the other hand, when the web is thick or a laminate with the absorbent body, the web may not be impregnated even when the air pressure flow is increased.
  • the liquid when the liquid is applied in the form of a continuous string, the liquid cannot be evenly applied to the surface of the web to be applied.
  • the liquid when sprayed in a fiber form, it can be applied over the entire surface rather than applying the liquid in a continuous string form, but there is a possibility that the liquid may escape from the web.
  • the production line may be contaminated by the splashing of liquid.
  • an object of the present invention is to completely and evenly apply liquid to a continuously transported web used for manufacturing absorbent articles, while suppressing the escape of applied liquid and controlling the degree of impregnation. Is to provide a liquid application apparatus and a liquid application method.
  • a liquid application apparatus for applying a liquid to a continuously conveyed web used for manufacturing an absorbent article, An application roll in which the entire peripheral surface is covered with a porous body that is compressively deformable including continuous pores and is rotatably supported; A feeder for supplying the liquid to the application roll so that the porous body is impregnated; Comprising The application roll is arranged with respect to the web such that a portion of the porous body that contacts the surface of the web is pushed inward in the radial direction by the web, and the application roll rotates during the web conveyance. The liquid impregnated in the porous body is applied to the web.
  • a liquid application device is provided.
  • a method of applying a liquid to a continuously conveyed web used in the manufacture of absorbent articles Providing an application roll in which the entire peripheral surface is covered by a compressible and deformable porous body including continuous pores and is rotatably supported; Supplying the liquid to the application roll so that the porous body is impregnated; The application roll is arranged with respect to the web such that a portion of the porous body that contacts the surface of the web is pushed inward in the radial direction by the web, and the application roll rotates during the web conveyance. Applying the liquid impregnated in the porous body to the web; including, A method is provided.
  • liquid is applied entirely and evenly to a continuously transported web used for manufacturing absorbent articles while suppressing the escape of applied liquid and controlling the degree of impregnation. Can do.
  • liquid application apparatus of 1st embodiment Comprising: The schematic of the liquid application apparatus with an application roll in an application position and a saucer in a retracted position. It is the liquid application apparatus of 1st embodiment, Comprising: The schematic of a liquid application apparatus with an application roll in a non-application position and a saucer in a retracted position. It is the liquid application apparatus of 1st embodiment, Comprising: The schematic of the liquid application apparatus with an application roll in a non-application position and a saucer in an action position.
  • the fragmentary perspective view of the liquid application apparatus of 1st embodiment The longitudinal cross-sectional view of the application roll of FIG. 1A.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.
  • FIG. 6 is a schematic enlarged view of a VI part in FIG. 5.
  • FIG. 6B is a view similar to FIG. 6A in which the application roll is disposed at a height position where the surfaces of the porous body and the web of the application roll are just in contact with each other.
  • the partial side view of the liquid application apparatus of 2nd embodiment The partial side view of the liquid application apparatus of 3rd embodiment.
  • FIG. 1A, FIG. 1B, and FIG. 1C show schematic views of the liquid application apparatus 1 of the first embodiment.
  • FIG. 1A the outline of the whole component of the liquid application apparatus 1 which concerns on 1st embodiment of this invention is demonstrated.
  • the liquid application apparatus 1 of 1st embodiment is the application roll 3 comprised from the porous body 3P which covers the hollow base 3B and the outer peripheral surface whole, and the support roll 5R which is a support device. Is provided. Between the application roll 3 and the support roll 5, the web 7 is conveyed in the conveyance direction MD (FIG. 2).
  • the porous body 3P of the application roll 3 abuts on the surface of the web 7 and is pushed inward in the radial direction. . At this time, the web 7 is supported in the vertical direction by the support roll 5R.
  • the web 7 is a sheet used for manufacturing an absorbent article such as a sanitary napkin or a paper diaper, a laminated body of these sheets, or a laminated body obtained by assembling these sheets and the absorbent body.
  • the web 7 of the first embodiment is a top sheet of a sanitary napkin.
  • a motor 11 that is attached to one end of a shaft body 3A via a shaft coupling 13 and can rotate the application roll 3 at a desired rotational speed.
  • a bearing 15 that supports the shaft body 3 ⁇ / b> A is disposed between the application roll 3 and the shaft coupling 13.
  • the liquid application apparatus 1 of the first embodiment includes a rotary joint 17 at the other end of the shaft body 3A.
  • the bearing 15 and the rotary joint 17 are connected to the suspension base 19 by a bar 21.
  • the suspension base 19 is raised and lowered in the vertical direction by an elevating device (not shown). Thereby, the connected bearing 15 and the rotary joint 17 are raised and lowered in the vertical direction.
  • the application roll 3 can be disposed at a desired height position.
  • the porous body 3P of the application roll 3 as shown in FIG. 1A abuts on the surface of the web 7, and the application position where the liquid is applied to the web 7, and the application roll as shown in FIGS. 1B and 1C.
  • 3 porous body 3P and the web 7 (in the first embodiment, when the web 7 is removed, the surface of the support roll 5R) is separated from the surface of the web 7 by the porous body 3P of the application roll 3
  • the application roll 3 can be arranged at a non-application position where the liquid is not applied to the web 7.
  • the support roll 5R is rotatably fixed at a predetermined position.
  • the height position of the shaft body 3A of the application roll 3 is fixed, and the support roll 5R is raised or lowered in the vertical direction. In yet another embodiment, both the application roll 3 and the support roll 5R are raised or lowered in the vertical direction.
  • the liquid applied to the web 7 is stored in the tank 23.
  • the liquid stored in the tank 23 is sent to a pump 27 which is a feeder through a tube 25.
  • the tank 23 is disposed at a position higher than the pump 27, and the liquid stored in the tank 23 is sent to the pump 27 by its own weight.
  • the pump 27 supplies the liquid to the application roll 3, specifically to the porous body 3 ⁇ / b> P via the tubes 29, 33, 35, the rotary joint 17 and the distributor 31.
  • the pump 27 can adjust the amount of liquid supplied to the application roll 3 based on the target value of the amount of liquid applied to the web 7.
  • the target value of the liquid amount to be applied is a value determined by the conveyance speed of the web 7, the application range of the liquid on the web 7, the basis weight of the liquid to be applied (application weight of the liquid per unit area), and the like.
  • the pump 27 includes a dial or a knob 37.
  • the operator can manually adjust the amount of liquid discharged from the pump 27 by operating the dial or knob 37.
  • the pump 27 includes a controller including, for example, a computer including a CPU (microprocessor), a memory, an input port, an output port, and the like, and the liquid discharge amount from the pump 27 is automatically set. Adjusted.
  • the pump 27 does not include means for adjusting the liquid discharge rate.
  • the liquid application apparatus 1 further includes a tray 39.
  • the tray 39 is a container that is open in the vertical direction, such as a metal bat.
  • the tray 39 is connected to the shaft body 39A at one end thereof, and is supported by the shaft body 39A.
  • a linear drive mechanism of, for example, a rack and pinion type is provided at the other end (not shown) of the shaft body 39A.
  • the retracted position shown in FIGS. 1A and 1B which is a position that does not hinder the rotational drive of the application roll 3 at the application position or the non-application position, and the vertical lower side of the application roll 3 at the non-application position.
  • the tray 39 can be disposed at the action position shown in FIG. 1C. Specifically, in the first embodiment, the retracted position of the tray 39 is beside the application roll 3, and the tray 39 can reciprocate between the retracted position and the operating position. The operation of the tray 39 will be described later.
  • FIG. 2 is a partial perspective view of the liquid application apparatus 1 according to the first embodiment.
  • the application roll 3 includes a hollow cylindrical base 3B made of a hard material such as a metal, and a compression-deformable porous body 3P including continuous pores such as a sponge disposed so as to cover the entire peripheral surface thereof. Formed from.
  • continuous pores are exposed in the web facing surface 3PFOp facing the web 7, which is a part of the outer surface 3PFO of the porous body 3P.
  • a deformable material that does not allow liquid to pass through, such as silicon, to the side surface 3PFOs of the outer surface 3PFO a liquid-impermeable surface may be formed so that the liquid does not ooze out from the side surface. it can.
  • a deformable material that does not allow liquid to pass through such as silicon
  • the web facing surface 3PFOp of the porous body 3P is substantially concentric with the outer peripheral surface of the cylindrical base portion 3B centering on the shaft portion 3A.
  • the web facing surface 3PFOp and the outer peripheral surface of the base 3B are not concentric.
  • FIG. 3 shows a longitudinal sectional view of the application roll 3 of FIG. 1A.
  • the liquid introduced into the application roll 3 by the tubes 33 and 35 is supplied to the distributor 41 installed inside the base 3B.
  • the distributor 41 is made of a resin having a hollow portion that becomes a portion of the passage 41C through which the liquid passes.
  • the passage 41C of the distributor 41 is connected to a hole 3BH provided in the base 3B.
  • FIG. 3 shows a state in which the passage 41C of the distributor 41 branches in two rows in the width direction of the application roll 3.
  • the passage 41C of the distributor 41 branches in three or more rows in the width direction.
  • the passage 41C does not branch in the width direction of the application roll 3.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 4 shows a state in which the passages 41 ⁇ / b> C of the distributors 41 are branched into four rows in the circumferential direction of the application roll 3.
  • the passage 41C branches into five or more rows in the circumferential direction of the application roll 3.
  • the passage 41C branches into three rows or two rows.
  • the passage 41 ⁇ / b> C does not branch in the circumferential direction of the application roll 3.
  • distributors 41 are provided in the application roll 3. In another embodiment, three or more distributors 41 are provided inside the application roll 3 in order to evenly distribute the liquid to the porous body 3P.
  • FIG. 5 shows a partial side view of the liquid application apparatus 1 of the first embodiment.
  • a state in which the web 7 is conveyed in the conveyance direction MD between the application roll 3 and the support roll 5 arranged at the application position is illustrated.
  • the liquid application apparatus 1 includes the motor 11 (FIG. 1A).
  • the application roll 3 is rotated by the motor 11 at a surface speed that is the same as or substantially the same as the surface speed of the web 7.
  • the liquid application apparatus 1 does not include the motor 11 and the application roll 3 is rotationally driven by the frictional force between the web 7 being conveyed in the conveyance direction MD and the porous body 3P.
  • FIG. 6A is a schematic enlarged view of a VI part in FIG.
  • the application roll 3 is arranged such that the porous body 3B is pushed inward in the radial direction of the application roll 3 and deformed by the web 7 supported by the support roll 5R. .
  • the web 7 is similarly compressed and deformed in the vertical direction, that is, in the thickness direction of the web 7.
  • FIG. 6B is a view similar to FIG. 6A and shows a state in which the application roll 3 is arranged at a height position where the surfaces of the porous body 3P and the web 7 of the application roll 3 just contact each other.
  • the porous body 3B and the web 7 are not compressed and deformed inward in the radial direction of the application roll 3 and in the thickness direction of the web 7, that is, here in a substantially vertical direction.
  • the total deformation amount V is the sum of the deformation amount of the porous body 3B inward in the radial direction of the application roll 3 and the deformation amount in the thickness direction of the web 7 in the present specification and claims. Defined. Therefore, in the state of FIG. 6B, the total deformation amount V is 0 [mm].
  • the height position of the surface of the web 7 at this time that is, the height position of the web facing surface 3PFOp portion of the porous body 3P in contact with the web 7 is defined as L1.
  • the porous body 3 ⁇ / b> B and the web 7 are respectively compressed inward in the radial direction of the application roll 3 and in the thickness direction of the web 7 at the positions where they abut. It is deformed. If the porous body 3B is not deformed at this time (the outline of the porous body 3B at this time is indicated by a dotted line), the height position at which the web facing surface 3PFOp will reach is defined as L2. .
  • the liquid 7 impregnated inside the porous body 3P oozes out on the surface of the porous body 3P when the porous body 3P is pushed and deformed by the web 7 inward in the radial direction of the application roll 3. .
  • the exuded liquid is applied to the web 7.
  • by increasing the total deformation amount V it is possible to impregnate the liquid in the thickness direction of the web 7 and apply the liquid to the deeper side of the web 7.
  • the total deformation amount V by reducing the total deformation amount V, the impregnation of the liquid in the thickness direction of the web 7 can be suppressed, and the escape of the liquid can be suppressed.
  • the degree of impregnation of the liquid into the web 7 and the escape of the liquid can be controlled by adjusting the total deformation amount V.
  • the amount of liquid applied to the web 7 is mainly determined by the amount of liquid supplied by the pump 27, the amount of liquid applied to the web 7 can be adjusted by adjusting the total deformation amount V. It can also be adjusted.
  • the web facing surface 3PFOp is concentric with the cylindrical surface of the base portion 3B, so that the total deformation amount V becomes constant as a whole. As a result, the liquid can be evenly applied to the web 7.
  • the total deformation amount V is preferably 1 to 10 mm. If the total deformation V is smaller than this, the web 7 cannot be properly impregnated with the liquid. Further, if the total deformation amount V is larger than 10 mm, the deformation of the porous body 3P becomes too large, which may impair the durability of the porous body 3P against repeated deformation.
  • the surface of the porous body 3P is repeatedly compressed and deformed by rotating when the web 7 is conveyed. Then, when returning from the compressed state to the original state, the compression-deformed portion causes the liquid impregnated inside by the capillary phenomenon and the centrifugal force due to the rotation of the application roll 3 to the web facing surface 3PFOp of the porous body 3P. Can be moved in the direction. Thereby, the distribution of the liquid inside the porous body 3P can be kept substantially uniform.
  • the liquid of the first embodiment is a low-viscosity liquid having a viscosity in the range of 0.05 to 4 Pa ⁇ s at least when applied to the web 7.
  • the liquid has a viscosity in the range of 0.05 to 4 Pa ⁇ s at 20 to 25 ° C. and 1 atm.
  • the liquid is a liquid having a higher viscosity.
  • the liquid is a liquid having a lower viscosity.
  • the liquid is a modifier for rapidly transferring menstrual blood from the top sheet to the absorber.
  • they are skin care agents, pH adjusters, antibacterial agents, fragrances, fragrances and the like.
  • the basis weight of the applied liquid is preferably 1 to 15 g / m 2 . If the applied amount is less than 1 g / m 2 , the liquid is applied only at the intersection of the fibers, and it may not be possible to apply the liquid evenly to the web 7. On the other hand, when the applied amount is larger than 15 g / m 2 , the applied amount of the liquid is too large, and there is a possibility that liquid leakage or line contamination may occur.
  • porous body 3P of the first embodiment a so-called sponge made from a urethane resin material having the following properties can be used.
  • the pore diameter is a value measured based on ASTM (Designation: D4404-84).
  • the water retention rate [%] is a value indicating the weight percent of water retained relative to the weight of the porous body.
  • the apparent density [g / m 3 ] is a density defined by JIS-K7222.
  • Hardness is a hardness defined by the Japan Rubber Association Standard (SRIS1010).
  • Such a porous material is widely supplied for industrial drawing and wiping applications, can be easily processed into an arbitrary shape, and can be obtained at a relatively low cost. It also has excellent wear resistance and chemical resistance to liquids.
  • the liquid application apparatus 1 of 1st embodiment there can exist the following effects.
  • (2) The amount of liquid supplied from the pump 27 (supply device) is determined by the dial or knob 37 according to the conveyance speed of the web 7, the application range of the liquid on the web 7, the weight of the liquid to be applied, and the like. The target value can be controlled. Thereby, a liquid can be continuously applied to the web 7 stably.
  • the liquid can be stably supplied to the web 7 even in a situation where the conveyance speed changes. Can be applied equally.
  • the height position of the web 7 in the vertical direction can be kept constant by the action of the support roll 5R (support device). Thereby, the porous body 3 ⁇ / b> P is pushed and deformed by the web 7, and the liquid can be applied to the web 7.
  • the liquid application apparatus 1 is provided with the support roll 5R, in another embodiment, it is not provided with the support roll 5R. This is because, when the total deformation amount V is small, the porous body 3P can be pushed in by the tension applied to the web 7 without the support roll 5R.
  • the liquid is impregnated in advance so as to be substantially uniform inside the porous body 3 ⁇ / b> P.
  • a desired liquid amount can be applied to the web 7. That is, when the liquid is applied to the web 7, if the amount of the liquid impregnated in the porous body 3 ⁇ / b> P is biased inside the web 7, the desired liquid amount is appropriately applied to each liquid application portion of the web 7. You may not be able to. As a result, a defective product is manufactured, which is not preferable from the viewpoint of manufacturing cost.
  • the application roll 3 before applying the liquid to the web 7, as shown in FIG. 1B and FIG. 1C, the application roll 3 is disposed at a non-application position where the porous body 3P does not contact the surface of the web 7, as described above.
  • the application roll 3 is rotated while supplying the liquid from the tank 23 to the porous body 3P. Thereby, the liquid can be uniformly impregnated into the porous body 3P. This is because by rotating the application roll 3, it is possible to prevent the liquid from being biased in a certain direction due to its own weight.
  • the liquid may ooze out from the porous body 3P by moving in the web facing surface 3PFOp direction from the inside of the porous body 3P by centrifugal force.
  • the liquid may drip onto the portion of the web 7 located under the application roll 3 or when the web 7 is removed from under the application roll 3 to contaminate the production line. is there.
  • the tray 39 is disposed at the operation position on the lower side in the vertical direction of the application roll 3 at the non-application position.
  • the liquid application apparatus 1 it may be necessary to temporarily stop the liquid application action of the liquid application apparatus 1 if, for example, a problem occurs in a part of the manufacturing process.
  • the supply of the liquid from the tank 23 to the porous body 3P and the conveyance of the web 7 are stopped, and the application roll 3 is moved to the non-application position as shown in FIG. 1B.
  • the rotational driving of the application roll 3 is stopped, the liquid impregnated in the porous body 3P moves downward in the vertical direction by its own weight.
  • the liquid drops from the porous body 3P onto the portion of the web 7 located below or onto the support roll 5R when the web 7 is removed from under the application roll 3, resulting in contamination of the production line. May cause.
  • the rotation speed of the application roll 3 at this time is preferably lower (for example, 30 rotations / minute) than the rotation speed (for example, 600 to 1500 rotations / minute) when the liquid is applied to the web 7. This is because the amount of liquid that oozes out from the inside of the porous body 3P can be reduced.
  • the liquid may ooze out from the porous body 3P by centrifugal force as described above. Therefore, even in such a case, as shown in FIG. 1C, it is preferable to move the tray 39 to the above-mentioned operation position so that the production line is not contaminated. As a result, by receiving the liquid oozed from the porous body 3P by the receiving tray 39, it is possible to prevent the production line from being contaminated.
  • the liquid application action of the liquid application apparatus 1 is stopped for a long time (for example, one day or longer), it is usually required to stop the rotation of the application roll 3 from the viewpoint of energy cost or safety. .
  • the rotation drive of the application roll 3 is stopped, the liquid oozes out from the porous body 3P as described above and drops below. Accordingly, as in the case described above, as shown in FIG. 1C, the contamination of the production line is prevented by moving the tray 39 to the above-described working position and receiving the liquid that has oozed out by the tray 39. Is required.
  • the application roll 3 is arranged at the non-application position, and the application roll 3 is rotated while supplying the liquid from the tank 23 to the porous body 3 ⁇ / b> P as necessary. preferable.
  • the liquid can be substantially uniformly impregnated inside the porous body 3P.
  • the above-described step of impregnating the liquid into the porous body 3P substantially uniformly before applying the liquid to the web 7 is referred to as an “idling step”.
  • the liquid is supplied from the tank 23 to the porous body 3P, the porous body 3P is brought into contact with the web 7, and the porous body 3P is pushed in, so that the liquid is supplied. Applies to web 7.
  • FIG. 7 shows a partial side view of the liquid application apparatus 1 of the second embodiment.
  • the porous body 3P of the second embodiment is composed of an inner porous body 3PLI and an outer porous body 3PLO whose properties of the porous material are different from each other. Therefore, the liquid introduced from the hole 3BH of the base 3B of the application roll 3 is first supplied to the inner surface of the inner porous body 3PLI. Next, as described above, the liquid moves to the outer porous body 3PLO by capillary action or centrifugal force. Then, the liquid is applied to the web 7 by the outer porous body 3PLO being pushed into the web 7.
  • a material having a larger pore diameter and / or porosity than the outer porous body 3PLO is selected for the inner porous body 3PLI. This is advantageous because the liquid supplied to the inner surface of the inner porous body 3PLI can be more quickly impregnated over the entire porous body 3P.
  • the outer porous body 3PLO can be easily pushed in by the web 7, which is advantageous.
  • FIG. 8 shows a partial side view of the liquid application apparatus 1 of the third embodiment.
  • the web 7 is a thick web, and is a web in which a plurality of webs constituting the absorbent article, for example, a top sheet, an absorbent body, a back sheet, and the like are assembled.
  • the liquid application apparatus 1 comprises not the support roll 5R but the belt conveyor 5B as a support device.
  • a support roll including a support surface 5RS (FIGS. 6A and 6B) having a curved surface shape that supports the web 7 at a certain height position. If 5R (FIG. 2 etc.) is used and the web 7 is supported, the web 7 will curve as shown in FIG. 6A, and will stick to the support roll 5R. Therefore, in order to prevent this sticking, it is preferable to use a belt conveyor 5B having a planar support surface 5BS when the web 7 is thick.
  • the liquid application apparatus 1 includes a receiving plate that is a plate including a planar support surface, instead of the belt conveyor 5B.
  • the arbitrary total deformation amount V can be applied without considering the sticking of the web 7 as described above, so that the web 7 can be effectively impregnated with the liquid.
  • the liquid can be applied to the depth of the web 7 in the thickness direction, which is advantageous.
  • FIG. 9 shows a partial side view of the liquid application apparatus 1 of the fourth embodiment.
  • the web 7 is a partially thick web.
  • the web 7 includes a sanitary napkin, a top sheet, an absorbent body, a back sheet, a semi-finished product including at least a pressure-sensitive adhesive for sticking the napkin to the shorts, and a release paper of the pressure-sensitive adhesive.
  • Product continuum In this case, the thick portion 7A of the web 7 is a central portion of each sanitary napkin and corresponds to a middle-high portion that is thicker than the other portions. It should be noted that the thickness of the portion corresponding to the middle-high portion in FIG. 9 is drawn extremely thick.
  • This semi-finished product continuum is in a state where it can be made into a usable product by cutting it into the shape of the product of the absorbent article.
  • the step of applying the liquid to the semi-finished product continuum is performed immediately before the step of cutting the semi-finished product continuum into the product shape.
  • the liquid applied to the web 7 is prevented from adhering to an apparatus, a production line, or the like in the process of assembling the components of another absorbent article.
  • the application roll 3 is positioned so that the surface of the porous body 3 ⁇ / b> P contacts the surface of the thick portion 7 ⁇ / b> A of the web 7, but does not contact the thin portion 7 ⁇ / b> B of the web 7. Is arranged. As a result, the liquid can be selectively applied only to the thick part 7A of the web, which is advantageous.
  • FIG. 10 shows a partial side view of the liquid application apparatus 1 of the fifth embodiment.
  • the surface of the web 7 is entirely flat, and the porous body 3P is formed so that the porous body 3P has a thick portion, that is, a convex portion 3PP. be able to.
  • the convex portion 3PP of the porous body 3P is selectively brought into contact with the web 7, and further, the convex portion 3PP is pushed by the web 7, and only the portion of the web 7 where the convex portion 3PP is in contact is selected. Liquid can be applied.
  • the web 7 is planar, but in another embodiment, the web 7 includes a thick portion and a thin portion as described in FIG. 9 for the fourth embodiment. And it can also apply a liquid to the said thin part by making the convex part 3PP of the porous body 3P contact
  • the porous body 3P is also formed with a portion to be called the concave portion 3PR.
  • the recess 3PR is configured not to contact the web 7.
  • both the convex portion 3PP and the concave portion 3PR are configured to contact the web 7 by reducing the height difference between the convex portion 3PP and the concave portion 3PR.
  • the liquid weight of the web 7 portion in contact with the convex portion 3PP is equal to the web 7 portion in which the concave portion 3PR contacts. More than. As a result, it is advantageous because the basis weight of the liquid can be selectively and locally changed by the portion of the web 7.
  • FIGS. 11 and 12 show a partial schematic view and a partial side view of the liquid application apparatus 1 of the sixth embodiment, respectively.
  • the liquid is supplied not to the application roll 3 but to the external supply roll 51 configured to be pressed in contact with the outer surface 3PFO of the porous body 3P of the application roll 3.
  • the external supply roll 51 includes a shaft body 51A and a supply porous body 51P formed so as to cover the periphery of the shaft body 51A.
  • the external supply roll 51 is rotatably supported by a support column 53.
  • the tube 29 connects the pump 27 to the shaft body 51A of the external supply roll 51 via the rotary joint 55 instead of the distributor 31, unlike the first embodiment.
  • the shaft body 51A is hollow, and has a plurality of holes (not shown) penetrating through the hollow portion of the shaft body 51A in a portion in contact with the supply porous body 51P.
  • the pump 27 first supplies a liquid to the hollow portion of the shaft body 51A.
  • the liquid in the hollow portion of the shaft body 51A is supplied to the supply porous body 51P from the inner surface of the supply porous body 51P through the plurality of holes of the shaft body 51A.
  • the supply porous body 51P is impregnated with the liquid.
  • the pump 27 supplies liquid by, for example, jetting or dropping directly to the external supply roll 51 without passing through the shaft body 51A and the rotary joint 55 of the external supply roll 51.
  • the supply porous body 51P impregnated with the liquid in this way is pressed into contact with the porous body 3P of the application roll 3, so that the liquid impregnated in the supply porous body 51P oozes out.
  • the oozed liquid is supplied to the outer surface 3PFO of the porous body 3P.
  • the pump 27 supply device supplies the liquid to the outer surface 3PFO of the porous body 3P.
  • the liquid when the liquid is supplied from the outer surface 3PFO of the porous body 3P, it is not necessary to impregnate the entire porous body 3P, and the portion of the porous body 3P that contacts the surface of the web 7 and applies the liquid to the web 7 is applied. This is advantageous because the liquid can be reliably supplied. Further, it is not necessary to provide a component such as a distributor for supplying the liquid inside the application roll 3, which is advantageous because the configuration of the application roll 3 can be simplified.
  • the present invention includes the following modified embodiments.
  • a belt conveyor 5B is used as the support.
  • the support roll 5R may be used instead of the belt conveyor 5B for these webs.
  • a belt conveyor 5B can be used instead of the support roll 5R.
  • porous body 3P composed of the inner porous body 3PLI and the outer porous body 3PLO described in the second embodiment can be used as the porous body 3P of the application roll 3 of other embodiments.
  • the porous body 3P has the convex portion 3PP, the convex portion 3PP is formed on the outer porous body 3PLO.
  • the liquid is supplied to the outer surface 3PFO of the porous body 3P by providing the external application roll 51 of the sixth embodiment in the liquid application apparatus 1 of the other embodiments.
  • the “idling stage” described in the first embodiment can also be performed before applying the liquid to the web 7 in the second to sixth embodiments, and the tray 39 is provided in the liquid application apparatus 1.
  • the application roll 3 can be disposed at the application position and the non-application position, and the tray 39 can be disposed at the retraction position and the operation position.
  • the application roll 3 may include another external supply roll in the liquid application apparatus 1 so that the liquid can be applied to the porous body 3P even when the application roll 3 is in the non-application position. .
  • the present invention is defined as follows.
  • a liquid application apparatus for applying a liquid to a continuously conveyed web used for manufacturing an absorbent article, An application roll in which the entire peripheral surface is covered with a porous body that is compressively deformable including continuous pores and is rotatably supported; A feeder for supplying the liquid to the application roll so that the porous body is impregnated; Comprising The application roll is arranged with respect to the web such that a portion of the porous body that contacts the surface of the web is pushed inward in the radial direction by the web, and the application roll rotates during the web conveyance. The liquid impregnated in the porous body is applied to the web. Liquid application equipment.
  • the support surface that supports the web of the support is a curved surface shape or a planar shape,
  • the supply device supplies the liquid to the inner surface of the porous body.
  • the liquid application apparatus according to (1) or (2).
  • the supply unit supplies the liquid to the outer surface of the porous body.
  • (1) to (3) The liquid application apparatus according to any one of (1) to (3).
  • the supply device is capable of adjusting the amount of liquid supplied to the application roll.
  • the liquid application apparatus according to any one of (4).
  • a motor for rotating the application roll is provided, The application roll is rotated at a surface speed that is the same as the web transport speed; (1) to (5) The liquid application apparatus according to any one of (5).
  • the liquid has a viscosity in the range of 0.05 to 4 Pa ⁇ s; (1) to (6)
  • the liquid application apparatus according to any one of (6).
  • the basis weight of the liquid applied to the web is 1 to 15 g / m 2 .
  • the liquid application apparatus according to any one of (7).
  • the total deformation amount of the porous body and the web is 1 to 10 mm.
  • the liquid application apparatus according to any one of (8).
  • the application roll can be arranged at a non-application position where the liquid is not applied to the web. It further comprises a saucer that can be disposed at an action position that is vertically below the application roll in the non-application position and a retreat position that is a position that does not hinder the rotational drive of the application roll.
  • a saucer that can be disposed at an action position that is vertically below the application roll in the non-application position and a retreat position that is a position that does not hinder the rotational drive of the application roll.
  • a liquid application method for applying a liquid to a continuously conveyed web, which is used for manufacturing an absorbent article A roll preparation step of preparing an application roll in which the entire peripheral surface is covered with a porous body that can be deformed by compression including continuous pores and is rotatably supported; A liquid supply step of supplying the liquid to the application roll so that the porous body is impregnated; The application roll is arranged with respect to the web such that a portion of the porous body that contacts the surface of the web is pushed inward in the radial direction by the web, and the application roll rotates during the web conveyance.
  • a liquid application step in which the liquid impregnated in the porous body is applied to the web including, Liquid application method.
  • the rotation speed of the application roll in the idling stage is lower than the rotation speed of the application roll in the liquid application stage.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
PCT/JP2013/077161 2012-10-10 2013-10-04 Dispositif et procédé d'application de corps liquide Ceased WO2014057895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-224998 2012-10-10
JP2012224998A JP6118061B2 (ja) 2012-10-10 2012-10-10 液体適用装置及び液体適用方法

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Publication Number Publication Date
WO2014057895A1 true WO2014057895A1 (fr) 2014-04-17

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JP (1) JP6118061B2 (fr)
TW (1) TW201438678A (fr)
WO (1) WO2014057895A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167055U (ja) * 1984-04-17 1985-11-06 トツパン・ム−ア株式会社 連続用紙折り畳み接着装置
JPS62273070A (ja) * 1986-05-19 1987-11-27 Fuaintetsuku Kenkyusho:Kk 超高速で連続的に移動するプラスチツクフイルム又はシ−トの表面に塗膜を形成する装置
JPH10151390A (ja) * 1996-11-22 1998-06-09 Tokyo Copal Kagaku Kk ロールコーティング装置
JP2009233628A (ja) * 2008-03-28 2009-10-15 Toray Ind Inc 塗料供給ロール、ロール塗布装置および塗布済みウェブの製造方法
JP2010201322A (ja) * 2009-03-02 2010-09-16 Uni Charm Corp 塗布装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235425A1 (fr) * 1986-02-28 1987-09-09 Acumeter Laboratories Inc. Dispositif et méthode d'application d'un matériau de revêtement fluide à l'aide d'un rouleau poreux
JP2002102761A (ja) * 2000-09-27 2002-04-09 Nichias Corp オイル塗布ローラ
JP2007050311A (ja) * 2005-08-15 2007-03-01 Toyo Seikan Kaisha Ltd コーティングロール
JP5324154B2 (ja) * 2007-08-06 2013-10-23 花王株式会社 液体塗工装置及び吸収性物品の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167055U (ja) * 1984-04-17 1985-11-06 トツパン・ム−ア株式会社 連続用紙折り畳み接着装置
JPS62273070A (ja) * 1986-05-19 1987-11-27 Fuaintetsuku Kenkyusho:Kk 超高速で連続的に移動するプラスチツクフイルム又はシ−トの表面に塗膜を形成する装置
JPH10151390A (ja) * 1996-11-22 1998-06-09 Tokyo Copal Kagaku Kk ロールコーティング装置
JP2009233628A (ja) * 2008-03-28 2009-10-15 Toray Ind Inc 塗料供給ロール、ロール塗布装置および塗布済みウェブの製造方法
JP2010201322A (ja) * 2009-03-02 2010-09-16 Uni Charm Corp 塗布装置

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JP2014076155A (ja) 2014-05-01
JP6118061B2 (ja) 2017-04-19

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