JP3460690B2 - Production equipment for fine particle carrying sheet - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an air purification device,
The present invention relates to a manufacturing device for manufacturing a sheet as a material of a honeycomb structure used for manufacturing a dehumidifying / humidifying device or various drainage purifying devices.

[0002]

2. Description of the Related Art Conventionally, there have been the following techniques for supporting fine particles on a base material such as a base sheet.

(A) By immersing the base material in a slurry which is a mixed liquid of fine particles and a binder, the fine particles are supported on the base material via a binder layer (dipping method).

(B) The binder is coated on the base material to form a binder layer having a predetermined thickness, the fine particles are dispersed on the binder layer, and then the fine particles are pressed against the base material by a pressing roller, whereby the fine particles are applied to the base material. Supporting via a binder layer (scattering and pressing method-Patent # 5305521-PatentGenius
No. 3 and Japanese Patent Laid-Open No. 6-388-).

(C) A binder is coated on a base material to form a binder layer having a predetermined thickness, and fine particles are sprayed onto the binder layer, whereby the fine particles are carried on the base material through the binder layer (spraying method- JP-A-8-98
No. 876, No. 7-155521 and No. 9-225302.

(D) A base material is coated with a binder to form a binder layer having a predetermined thickness, and the base material is carried in between two flat plate electrodes. A voltage is applied between the two flat plate electrodes to dielectrically polarize the fine particles, and the fine particles are carried by the electrostatic force on the substrate through the binder layer (electrostatic flocking method).

(E) The base material is grounded to serve as an anode, while a negative charge is applied to the atomized fine particles to cause the fine particles to scatter in the electric field surrounding the base material. Support (electrostatic powder coating method).

(F) By sputtering or vapor deposition,
The fine particles are once heated and evaporated to form a film on the substrate (physical vapor deposition method-see Japanese Patent Application Laid-Open No. 10-286456).

[0009]

However, since the above-mentioned dipping method (a) is a method of immersing the base material in the slurry and pulling it up, the binder layer must be thick and uniform. Is difficult. In order to make the thickness of the binder layer thin and uniform, it is necessary to lower the viscosity of the slurry, but if the viscosity is too low, the amount of fine particles attached per unit area will decrease and the function will be sufficiently exerted. Can't do it. For this reason, the viscosity of the slurry cannot be set to be too low, and in consideration of the smoothness of the binder layer and the amount of fine particles deposited, generally, it is formed on the base material (101) as shown in FIG. 2 (b). The layer thickness (t1) of the bound binder layer (102) is
The thickness is set to 30 to 40 μm, which increases the cost. In addition, in this dipping method, the base material (101)
Most of the fine particles (103) carried on the are buried in the binder layer (102),
The function originally possessed by the fine particles (103) is buried in the binder and is not in a state capable of exhibiting the function sufficiently. Furthermore, it is generally difficult to uniformly disperse the fine particles (103) in the slurry, and the fine particles (10
It is difficult to evenly distribute and support 3) on the entire base material (101). In addition, since the dipping method is a method of repeating the operation of immersing the base material (101) in the slurry one by one and pulling it up,
It is difficult to apply when the base material (101) is a long product such as a sheet.

In both of the spray pressing method (b) and the spraying method (c), the binder coated base material is passed through a layer thickness adjusting roll to form a binder layer on the base material. Since the layer thickness of the binder layer can be freely controlled, the layer thickness (t2) of the binder layer (202) can be set as thin as about 10 μm as shown in FIG. It is possible to carry out continuous operations such as fine particle spraying and spraying, and it can be applied even when the base material (201) is a long object such as a sheet, but on the other hand, fine particles (203) are sprayed. Since it adheres to the binder layer (202) by spraying or spraying, unevenness is inevitably generated, and it is difficult to uniformly distribute the fine particles (103) over the entire base material (101) in a high density.

In the electrostatic flocking method of (d) above, the fine particles are carried on the substrate by electrostatic force, so that the above (a) to (a)
Compared to (c), the fine particles can be uniformly distributed and supported on the entire base material, but since the dielectric polarization is used to support the fine particles, the shape of the fine particles is limited to the elongated shape.
Poor versatility. In addition, the equipment becomes large-scale and the equipment cost increases.

The electrostatic powder coating method of (e) above and (f)
Similar to the electrostatic flocking method of (d), both of the physical vapor deposition methods of (3) can carry fine particles uniformly distributed and supported on the entire substrate, but the equipment becomes large and the equipment cost is high. Bulky.

By the way, in the above-mentioned case, it is desirable from the economical point of view to use the fine particles as a raw material without waste, but in the above-mentioned spraying and pressing method (b), the fine particles are sprayed on the binder layer without excess or deficiency. Difficult to do,
Fine particles will be sprayed more than necessary so as not to run short. Therefore, extra fine particles that do not adhere to the binder layer are generated. Further, since the fine particles scattered on the binder layer are pressed against the base material by the pressing roller, the particles adhere to the pressing roller. The surplus fine particles that do not adhere to the binder layer and the fine particles that adhere to the pressing roller are currently collected and reused after the work is finished, or they are subjected to waste disposal, which is an extra part of the recovery work. The process is required, and the fine particles are wasted as much as they are disposed of.

In the above-mentioned spraying method (c), if the fine particles are attempted to adhere even to the end portions of the binder layer, fine particles will inevitably come out of the binder layer. Further, since the method is a spraying method, the fine particles that do not adhere to the binder layer float in the air. Such fine particles separated from the binder layer and fine particles floating in the air are collected and reused after the work is completed or disposed of like the above-mentioned spray pressing method (b). This is the current situation, and an extra step of recovery work is required, and the fine particles are wasted by the amount of waste. Further, the working environment is deteriorated by the fine particles floating in the air.

In the electrostatic flocking method of (d) above, when fine particles that do not undergo dielectric polarization are generated for some reason, these fine particles do not adhere to the base material, so they are collected and reused after the work is completed or discarded. Therefore, an extra step of recovery work is required, and the fine particles are wasted by the amount of waste disposal.

In the electrostatic powder coating method (e), since the charged fine particles are sprayed, the fine particles adhere not only to the binder layer but also to the wall surface of the processing chamber and are difficult to remove. Etc. will be hard.

The present invention has been made in view of the above points, and it is an object of the present invention to provide fine particles such as functional fine particles with high density on the surface without being buried in the binder layer regardless of the type. Further, it is an object of the present invention to provide a manufacturing apparatus for manufacturing a sheet carrying fine particles efficiently, in which the sheets are adhered in an orderly and wasteless manner, and further, without using a large-scale facility. Furthermore, it is to ensure a clean working environment.

[0018]

In order to achieve the above object, the present invention charges the binder particles (4) immediately before they are attached to the binder layer (3) of the base sheet (2), and at the same time, the binder layer (3) is charged. ) Is reused, and the fine particles (4) not adhered to () are reused.

Specifically, the present invention is directed to an apparatus for producing a fine particle carrying sheet (1) in which fine particles (4) are carried on a base sheet (2) through a binder layer (3),
The following measures were taken.

That is, in the invention described in claim 1, the binder layer forming means (11) for forming the binder layer (3) on the base sheet (2) by coating, and the sheet movement of the binder layer forming means (11). Between the fine particle supplying means (12) provided on the downstream side in the direction and the continuously moving base sheet (2) arranged in the fine particle carrying chamber (26) adjacent to the fine particle supplying means (12). A voltage is applied to the electric field to form an electric field, and in the process in which the base sheet (2) continuously passes through the electric field region (23), it is supplied from the fine particle supply means (12) to the electric field region (23). One layer or two or more layers in which the fine particles (4) are charged in a unipolar manner, the charged fine particles (4) are regularly arranged by electrostatic force, and the entire base sheet (2) is uniformly and densely covered. As a fine particle layer (24) attached to the binder layer (3) and supported on the base sheet (2), and the fine particles (4) of the outermost layer of the fine particle layer (24) are embedded in the binder layer (3). Part of the shape is connected to the fine particle carrying means (13), which is the fine particle carrying sheet (1) exposed from the binder layer (3) and the fine particle carrying chamber (26), and is connected to the electric field region (23). The fine particle circulation transfer means (2) for circulating and transferring the fine particles (4) which are detached and suspended in the fine particle carrying chamber (26) to the side of the fine particle supply means (12) so as to supply the electric field region (23).
7) and are provided.

With the above-mentioned structure, in the invention according to claim 1, in the produced fine particle carrying sheet (1), the fine particles (4) in the outermost layer of the fine particle layer (24) are bound by the action of attracting an electrostatic force to the binder. In the exposed state without being buried in the layer (3), the particles are densely arranged in order and adhered without waste, and the exposed portion of the fine particles (4) from the binder layer (3) is increased, so that the fine particles (4) The function originally possessed is fully exerted.

In particular, the layer thickness (T) of the binder layer (3) is formed thin and uniform by the coating method, the material cost is not correspondingly increased, and the fine particle carrying sheet (1) can be manufactured at low cost.

Further, unlike the dipping method, the slurry does not have to have a low viscosity, so that the amount of the fine particles (4) attached per unit area is secured.

After forming the binder layer (3) on the base sheet (2) and subsequently adhering the fine particles (4) to the binder layer (3), the binder layer forming work and the fine particle carrying work are performed. Are continuously performed without interruption, and the production efficiency is improved.

In addition, particles (4) are produced by using electrostatic force.
Although it is carried on the base sheet (2),
Unlike the electrostatic flocking method, since the fine particles (4) are charged to a single polarity, the fine particles (4) are not limited to the elongated shape as in the electrostatic flocking method, and have excellent versatility regardless of the type. Moreover, the large-scale equipment required for the electrostatic flocking method, the electrostatic powder coating method, and the physical vapor deposition method is not needed, and the cost is low.

Furthermore, the fine particles (4) are in the electric field region (2
3) is not charged or is only weakly charged until it is supplied to the electric field region (23), that is, it is strongly charged at the same time as it is attached to the binder layer (3). Therefore, even if there are fine particles (4) out of the electric field region (23), these fine particles (4) are not charged or are only weakly charged, and the inner wall of the fine particle carrying chamber (26) is almost free of charge. Floating without adhering. The floating particles (4) are circulated and transferred to the particle supply means (12) by the particle circulation transfer means (27), supplied to the electric field region (23), and carried on the base sheet (2). All the fine particles (4) are efficiently carried on the base sheet (2), and the extra step of recovery work and the waste of waste disposal are eliminated.

Further, since the fine particles (4) floating in the fine particle carrying chamber (26) are circulated and transferred to the fine particle supply means (12) side by the fine particle circulation transfer means (27),
A clean working environment is secured without scattering to the work space outside the fine particle carrying chamber (26).

According to a second aspect of the invention, in the first aspect of the invention, the fine particle carrying means (13) are arranged in parallel with the sheet surface of the base sheet (2) at a predetermined interval. An electrode rod (20) and a power source (21) for applying a voltage between the electrode rod (20) and the base sheet (2).
It is characterized by having and.

With the above construction, in the second aspect of the invention, the construction of the fine particle carrying means (13) is embodied.
According to this, since the parallelism is easily obtained and the strong electric field is stably obtained by the rod shape of the electrode rod (20) as compared with the case of the flat plate electrode, the fine particles (4) are carried accurately.

According to a third aspect of the present invention, in the first aspect of the present invention, the fine particle circulation transfer means (27) has one end at which the fine particle supply means (12) is located upstream of the fine particle carrying chamber (26) in the sheet moving direction. ) Near the other end, and the other end has a fine particle carrying chamber (2
6) Pipes (29) that are respectively connected to the downstream side in the sheet moving direction to form the circulation path (28) and fine particles (4) floating in the fine particle carrying chamber (26) from the downstream side in the sheet moving direction. It is characterized by comprising a fine particle transfer means (30) which is introduced into the pipe (29) and is led out into the fine particle carrying chamber (26) from the upstream side in the sheet moving direction.

With the above structure, in the invention described in claim 3, the structure of the fine particle circulation transfer means (27) is embodied.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the fine particles (4) are provided by the fine particle supplying means (12) so that the amount of fine particles adhering to the binder layer (3) per unit area becomes constant. And a fine particle supply amount control means (31) for increasing / decreasing the supply amount of the fine particles (4) circulated by the fine particle circulation transfer means (27) and supplied to the electric field region (23). It is characterized by

With the above construction, in the invention according to claim 4, the supply amount of the fine particles (4) circulated and transferred by the fine particle circulation transfer means (27) and supplied to the electric field region (23) varies. , The fine particle supply means (1
The supply amount of the fine particles (4) supplied from 2) to the electric field region (23) is controlled to be increased or decreased by the fine particle supply amount control means (31), and the electric field region (23) is always in an appropriate amount without excess or deficiency. To ensure the quality.

According to a fifth aspect of the invention, in the fourth aspect of the invention, the fine particle supply amount control means (31) measures the floating concentration of the fine particles (4) floating in the fine particle carrying chamber (26). And a control unit (3) for increasing / decreasing the amount of fine particles (4) supplied by the fine particle supply means (12) based on the measured value of the concentration measuring means (32).
3) and are provided.

With the above structure, in the invention described in claim 5, the structure of the fine particle supply amount control means (31) is embodied.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 (a) schematically shows a sectional structure of the fine particle carrying sheet (1) produced by the method for producing the fine particle carrying sheet (1) according to the embodiment of the present invention. The fine particle-carrying sheet (1) comprises a base sheet (2) made of, for example, an aluminum alloy, and a binder layer (3) having a layer thickness (T) of about 10 μm is formed on the base sheet (2). ing. Further, the functional fine particles (4) having a particle diameter of 2 to 10 μm are attached to the binder layer (3), whereby the functional fine particles (4) are added to the binder layer (4) on the base sheet (2). 3) to support the fine particle-carrying sheet (1).

Examples of the binder constituting the binder layer (3) include inorganic binders such as colloidal silica, organic binders, thermoplastic resin adhesives, thermosetting resin adhesives, water-based or organic solvent-based emulsion adhesives. , Solvent-based adhesives, natural rubber-based adhesives, synthetic rubber-based adhesives, silicone rubber-based adhesives, etc., depending on the type of base sheet (2) and functional fine particles (4) used. Just select it.

The functional fine particles (4) are supplied to the electric field region (23) through which the base sheet (2) continuously passes to be charged unipolarly, which will be described in detail in the production method described later. In a state where the base sheet (2) is lined up orderly by electrostatic force and the entire base sheet (2) is covered with high density evenly, three fine particle layers (24) are attached to the binder layer (3) and attached to the base sheet (2). ), The fine particles (4) of the outermost layer of the fine particle layer (24) are partially buried in the binder layer (3) without being buried in the binder layer (3).

As a result, a large portion of the functional fine particles (4) exposed from the binder layer (3) can be secured, and the function originally possessed by the functional fine particles (4) can be sufficiently exerted. .

As the functional fine particles (4), dehumidification,
Zeolites that exhibit various functions such as humidification, deodorization, and removal of harmful gases, microcapsules that exhibit various functions such as sterilization, aroma, addition of useful components, etc. Photocatalyst that exerts its function, other,
Examples include magnetic materials, high-dielectric materials, heat conductors, diamond powders, and phosphors. These can be used not only singly but also in combination. The specific examples of the functional fine particles (4) listed below are merely examples, and the present invention is not limited to these, and may be fine particles capable of exhibiting special functions required in all industrial fields. In particular, it can be used regardless of its type.

The above-mentioned microcapsules are, for example,
Examples include microcapsules of chitosan, which is a natural polysaccharide contained in crab shells and shrimp shells and has antibacterial and antifungal properties, and microcapsules of other active ingredients that act as sterilizers and bacteriostatic agents.

As the photocatalyst, for example, Ti
O ₂ , CdS, CdSe, WO ₃ , Fe ₂ O ₃ , SrT
iO ₃ , ZnO, ZnO ₂ , RuO ₂ , Cs ₃ Sb, I
nAs, InSb, GaAs, etc., and further, a metal such as platinum is carried on the base of these.

Examples of the magnetic material include Cr
O ₂ , Fe ₂ O ₃ , Fe metal powder, barium ferrite powder, Co substitution product and the like.

As the high dielectric material, for example, BaTi is used.
It is a ceramic made by adding La, Zr, Sr, etc. to O ₃ .

The heat conductor may be, for example, SiC.
Ceramics such as (silicon carbide).

The diamond powder is, for example, a diamond C powder, whether natural or artificial.

As the above-mentioned phosphor, for example, MAl ₂ O ₄
In the compound represented by, M is a compound composed of at least one metal element selected from the group consisting of calcium, strontium, and barium (in some cases, a plurality of metal elements to which magnesium is further added) as a mother crystal. , To which a predetermined amount of europium as an activator was added in a mol% with respect to the metal element represented by M, and further, a predetermined amount of lansen, cerium, praseodymium, etc. was added as a coactivator in a mol% with respect to the metal element represented by M. Body (see JP-A-7-11250), ZnS: Cu (zinc sulfide-based phosphorescent material), CaS: Bi, CaSrS: Bi, and the like.

Next, an example of a fine particle carrying sheet producing apparatus for producing the fine particle carrying sheet (1) configured as described above will be described with reference to FIG.

As shown in FIG. 1, this apparatus for producing a fine particle carrying sheet comprises a binder coating device section (11) as a binder layer forming means and a binder coating device section (1).
1) A fine particle supplying device (12) as a fine particle supplying means arranged on the downstream side (the right side in FIG. 1) in the sheet moving direction, and a fine particle supporting device as a fine particle supporting means adjacent to the fine particle supplying device (12). It is roughly divided into (13).

The binder coating device section (11) includes a binder tank (14) in which a binder (3 ') is stored.
And a pair of upper and lower layer thickness adjusting rolls (15) rotatably disposed on the downstream side (the right side in FIG. 1) of the binder tank (14) in the sheet moving direction. In the binder tank (14), four guide rolls (16) are rotatably arranged two by two, and the lower two guide rolls (16) are arranged in the binder tank (14). And the upper two guide rolls (16) are immersed in the binder (3 ').
It is located above 4). Further, the pair of layer thickness adjusting rolls (15) can adjust the distance between each other according to the layer thickness (T) of the binder layer (3) to be formed. A delivery shaft (17) is arranged at the upstream end of the binder tank (14) in the sheet moving direction (left end in FIG. 1), and a winding shaft (18) is arranged at the downstream end in the sheet moving direction (right end in FIG. 1). The delivery shaft (1
7), the base sheet (2) is wound and arranged in a roll shape. The base sheet (2) is fed by rotating the winding shaft (18), guided by a guide roll (16) and passed through the binder tank (14), and then the pair of layer thicknesses is adjusted. It is designed to be introduced between rolls (15). The binder tank (1
The binder (3 ′) adhered to the base sheet (2) by passing through 4) is coated with the amount of adhesion adjusted during the process of passing between the pair of layer thickness adjusting rolls (15),
The binder layer (3) having a predetermined thickness is formed. In this example, the binder (3 ') attached to the lower surface of the base sheet (2) in FIG. 1 is removed by a blade or the like not shown, and the binder layer (3) is formed only on the upper surface of the base sheet (2).

The fine particle supply device (12) is provided with a hopper (19) in which the functional fine particles (4) are stored, and the fine particle supply unit (19a) at the lower end of the hopper (19) has a fine particle circulation transfer device (described later). The pipe (29) of 27) is connected to the downstream end side. Then, the functional fine particles (4) in the hopper (19) are supplied to the electric field region (23) described later through the pipe (29) from the fine particle supply unit (19a) while being dispersed by the flow of the air flow. ing.

A fine particle carrying chamber (26) is adjacently provided on the downstream side (the right side in FIG. 1) of the fine particle supplying means (12) in the sheet moving direction, and a fine particle carrying device (13) is provided in the fine particle carrying chamber (26). ) Has been placed. The fine particle carrier (13) is provided with an electrode rod (20) arranged above the base sheet (2) in parallel to the sheet surface at a predetermined interval (for example, 100 mm), and the electrode rod (20). Is connected to a power source (21), the opposite electrode is connected to the base sheet (2), and the base sheet (2) is grounded. Then, a voltage (for example, a voltage) is applied between the electrode rod (20) and the base sheet (2) which is fed from the feeding shaft (17) and continuously moved while being guided by a plurality of guide rolls (22). 5 to 10 kV) is applied to form an electric field. In FIG. 1, the region indicated by reference numeral (23) is the electric field region.

Then, in the process in which the base sheet (2) continuously passes through the electric field region (23), the functional fine particles (4) supplied from the particle supply device (12) to the electric field region (23). In a state in which the charged fine particles (4) are regularly arranged by electrostatic force and the entire base sheet (2) is uniformly and densely covered, as a three-layer fine particle layer (24). Part of the shape of the functional layer (4) of the outermost layer of the fine particle layer (24) adhered to the layer (3) and supported on the base sheet (2) without being buried in the binder layer (3). Is the fine particle carrying sheet (1) exposed from the binder layer (3).

A fine particle circulation transfer device (27) as a fine particle circulation transfer means is connected to the fine particle carrying chamber (26). The fine particle circulation transfer device (27) has one end (the left end in FIG. 1) near the fine particle supply device (12) on the upstream side (the left side in FIG. 1) in the sheet moving direction of the fine particle carrying chamber (26) and the other end (FIG. 1). A pipe (29) is provided, the right end of which is connected to the downstream side (the right side in FIG. 1) of the fine particle carrying chamber (26) in the sheet moving direction to form a circulation path (28).
A fan (30) as a fine particle transfer means is arranged almost in the middle of the pipe (29), and gas is sent by rotational movement of the fan (30) to float in the fine particle carrying chamber (26). The functional fine particles (4) to be introduced are introduced into the pipe (29) from the downstream side in the sheet moving direction (right side in FIG. 1), and are led out into the fine particle carrying chamber (26) from the upstream side in the sheet moving direction (left side in FIG. 1). , So as to circulate and transfer the functional fine particles (4) floating in the fine particle carrying chamber (26) out of the electric field region (23) to the side of the fine particle supply device (12) to supply to the electric field region (23). Has become.

Further, the apparatus for producing a fine particle carrying sheet of the present invention is provided with a fine particle supply amount control device (31) as fine particle supply amount control means, and the fine particle supply amount control device (3
1) so that the amount of adhered fine particles per unit area on the binder layer (3) becomes constant.
The supply amount of the functional fine particles (4) by (2) is circulated and transferred by the fine particle circulation transfer device (27) to generate an electric field region (23).
The increase / decrease is controlled according to the supply amount of the functional fine particles (4) supplied to the. Specifically, the particle supply amount control device (31) includes a concentration measuring device (32) as a concentration measuring means and a control section (33), and the concentration measuring device (32) is a functional fine particle (32). 4) is supplied from the particle supply device (12) to the electric field region (23), it is not charged outside the electric field region (23) and is not charged.
The floating concentration of the functional fine particles (4) floating in 6) is measured. The control unit (33) controls the supply amount of the functional fine particles (4), which is circulated and transferred in the circulation path (28) by the fan (30) and supplied to the electric field region (23), to the concentration measuring device (32). Calculated based on the measured value of
That is, the increase / decrease amount of the functional fine particles (4) with respect to the reference supply amount is calculated to control the increase / decrease of the supply amount of the functional fine particles (4) by the fine particle supply device (12), and the functionality supplied to the electric field region (23). The supply amount of the fine particles (4) is set appropriately without excess or deficiency.

A drying chamber (25) is arranged on the downstream side (the right side in FIG. 1) in the sheet moving direction of the fine particle carrying device (13), and the functional fine particles (4) contain the binder layer (4) in the fine particle carrying device (13). By introducing the base sheet (2) attached to 3) into the drying chamber (25), the binder layer (3) is dried and the functional fine particles (4) are added to the binder layer (3) on the base sheet (2). The fine particle-carrying sheet (1) is carried by means of, and the fine particle-carrying sheet (1) is wound on the winding shaft (18).

Next, the procedure for producing the fine particle carrying sheet (1) by the fine particle carrying sheet producing apparatus configured as described above will be described with reference to FIG.

First, the winding shaft (18) is rotationally driven to feed the base sheet (2) wound around the feeding shaft (17) in a roll at a predetermined speed.
As a result, the base sheet (2) is moved to the guide roll (1
Guided by 6), it passes through the binder tank (14), and the binder (3 ') adheres to the surface of the base sheet (2).

Next, the base sheet (2) to which the binder (3 ') is attached continuously moves to the downstream side (the right side in FIG. 1) in the sheet moving direction, and a pair of upper and lower layer thickness adjusting rolls (15).
Pass through. Thereby, the amount of the binder (3 ') attached is adjusted and coated, and the binder layer (3) having a predetermined thickness is formed on the base sheet (2) by coating.

Thereafter, the base sheet (2) having the binder layer (3) formed thereon is guided by the guide rolls (22) and continuously moves to the downstream side (the right side in FIG. 1) in the sheet moving direction, and the fine particle carrying device ( Pass 13). In the fine particle carrier (13), a power source (21) is turned on to apply a voltage, and an electric field region (23) is formed between the electrode rod (20) and the base sheet (2). Further, a fixed amount of the functional fine particles (4) is continuously supplied to the electric field region (23) from the fine particle supply device (12), and the functional fine particles (4) enter the electric field region (23). Charge to a single polarity. Therefore, the charged fine particles (4) are attracted to the binder layer (3) of the base sheet (2) by the electrostatic force during the process of the base sheet (2) passing through the electric field region (23). As a result, the functional fine particles (4) are attached to the binder layer (3) as three fine particle layers (24) in a state where the functional fine particles (4) are lined up in an orderly manner and the entire base sheet (2) is uniformly covered. Supported on the base sheet (2), and the functional particles (4) of the outermost layer of the particle layer (24) are not buried in the binder layer (3) and a part of the shape thereof is the binder layer (3). A fine particle carrying sheet (1) exposed from is obtained (see FIG. 2 (a)). Further, the functional fine particles (4) floating in the fine particle carrying chamber (26) outside the electric field region (23) are supplied to the fine particle supplying device in the fine particle carrying chamber (26) through the pipe (29) by the fan (30). It is circulated and transferred to the (12) side and supplied to the electric field region (23). The amount of the floating functional particles (4) supplied is determined by the concentration measuring device (32).
The control unit (33) calculates the particle supply amount by the particle supply device (12) based on the measured value, and controls the current supply amount to increase or decrease with respect to the reference supply amount to the electric field region (23). The amount of fine particles supplied is set appropriately.

Thereafter, the fine particle carrying sheet (1) continuously moves in the drying chamber (25) to dry the binder layer (3), and then it is wound on the winding shaft (18) to perform a series of operations. Ends.

In the thus obtained fine particle carrying sheet (1), since the binder layer (3) is formed by coating, the layer thickness (T) can be made thin and uniform. The material cost can be reduced by that much, and the fine particle carrying sheet (1) can be manufactured at low cost.

Furthermore, since it is not necessary to make the slurry have a low viscosity as in the dipping method, the functional fine particles (4) can be adhered to a certain area with high density.

Further, since the binder layer (3) is formed on the base sheet (2), the functional fine particles (4) are continuously adhered to the binder layer (3) continuously without interruption. Efficient particulate support sheet (1)
Can be produced.

In addition, since the functional fine particles (4) are unipolarly charged and carried on the base sheet (2) by utilizing electrostatic force, the functional fine particles such as the electrostatic flocking method for dielectric polarization ( There is no limitation on the shape of 4), it can be used regardless of its type, it is versatile, and large-scale equipment such as electrostatic flocking method, electrostatic powder coating method and physical vapor deposition method. It is possible to eliminate enormous capital investment with a simple device without using.

Furthermore, the functional fine particles (4) floating out of the electric field region (23) without being charged and adhering to the inner wall of the fine particle carrying chamber (26) are charged by the fine particle circulation transfer device (27). Since it is circulated and supplied to the electric field region (23) to be carried on the base sheet (2), all the functional fine particles (4) can be efficiently carried on the base sheet (2), which is an extra step of recovery work. It is possible to eliminate unnecessary processes and waste such as disposal.

Further, since the electrode rod (20) is used as one of the electrodes for forming the electric field, the parallelism can be easily obtained and stable as compared with the case where the electrode is a flat plate because of the rod shape. By the strong electric field, the functional fine particles (4) can be accurately attached to the binder layer (3).

Furthermore, since the functional fine particles (4) floating in the fine particle carrying chamber (26) are circulated through the pipe (29), the floating fine particles (4) are scattered to the work place outside the fine particle carrying chamber (26). Can be prevented and a clean work environment can be secured.

Further, the supply amount of the functional fine particles (4) by the fine particle supply device (12) is controlled by the fine particle circulation transfer device (27).
Since the increase / decrease control is performed according to the supply amount of the functional fine particles (4) that are circulated and transferred to the electric field region (23), the circulating supply amount of the functional fine particles (4) varies. Also, the quality can be secured by always supplying the functional particles (4) to the electric field region (23) in an appropriate amount without excess or deficiency.

The fine particle-carrying sheet (1) produced in this manner is a disc-shaped honeycomb rotor as shown in FIG. 3 (a), or a rectangular parallelepiped honeycomb core material as shown in FIG. 3 (b). Is processed into the honeycomb structure (A). As shown in FIG. 3 (c), these honeycomb structures (A) have a corrugated sheet (1 a) formed by corrugating the fine particle carrying sheet (1), and the fine particle carrying sheet (1).
And the flat sheet (1b) are alternately laminated and used for manufacturing an air purifying device, a dehumidifying / humidifying device, various waste water purifying devices, and the like.

In the above embodiment, the functional fine particles (4) are carried on one surface of the base sheet (2).
The electrode rod (20) may be arranged also on the lower side of the base sheet (2) so that the functional fine particles (4) are carried on both sides of the base sheet (2).

In the above embodiment, the electric field is formed between the base sheet (2) and the electrode rod (20) using the base sheet (2) as one of the electrodes. If the ratio is low, an electrode plate may be arranged on the lower surface of the base sheet (2) to form an electric field.

Further, in the above embodiment, the case where the fine particle layer (24) is three layers is shown, but it may be one layer or two layers depending on the particle size of the functional fine particles (4) and the purpose of use. Alternatively, it may have four or more layers.

Furthermore, in the above-mentioned embodiment, the case where the fine particles have the function has been described, but the present invention can be similarly applied to the fine particles having no special function.

[0076]

As described above, according to the inventions of claims 1 to 5, in the electric field region (23) where the base sheet (2) continuously passes the fine particles (4) such as functional fine particles. By supplying and charging to unipolarity, one or two or more fine particle layers (24) are formed in a state where they are lined up in order by electrostatic force and cover the whole base sheet (2) with high density. Part of the shape of the fine particles layer (24) without being buried in the binder layer (3) by adhering it to the binder layer (3) and supporting it on the base sheet (2). Since the fine particle-carrying sheet (1) exposed from the binder layer (3) can be obtained, the function can be sufficiently exhibited when the fine particles (4) are functional fine particles. Also,
Since the layer thickness (T) of the binder layer (3) can be formed thin and uniform by a coating method, an inexpensive fine particle carrying sheet (1) can be obtained without incurring material costs, and at the same time, it can be obtained by a dipping method. Since the slurry does not have to have a low viscosity as described above, the fine particles (4) can be adhered at a high density. Furthermore, since the binder layer forming work and the fine particle carrying work are continuously performed without interruption,
The fine particle carrying sheet (1) can be efficiently produced. In addition, since the fine particles (4) are charged with unipolarity rather than dielectric polarization, there is no limitation on the particle shape as in the electrostatic flocking method, and the versatility can be increased and the electrostatic flocking method can be used. The equipment can be made inexpensive without making the equipment large, such as the electrostatic powder coating method and the physical vapor deposition method. Furthermore, since only the fine particles (4) that have entered the electric field region (23) are charged and the other non-charged floating fine particles (4) are circulated and reused,
By efficiently supporting all the fine particles (4) on the base sheet (2), it is possible to eliminate an extra step of collection work and waste of disposal. Further, the fine particle carrying chamber (2
Since the fine particles (4) floating in 6) are circulated and transferred by the fine particle circulation transfer means (27), the functional fine particles (4).
It is possible to improve the working environment by not leaving the work place.

In particular, according to the second aspect of the invention, since the electrode rod (20) having a higher degree of parallelism than that of the flat plate electrode is used as one of the electrodes, a stable strong electric field is applied to the fine particles (4). ) Can be accurately attached.

According to the inventions of claims 4 and 5,
The supply amount of the fine particles (4) by the fine particle supply means (12) is controlled to be increased or decreased according to the supply amount of the fine particles (4) circulated and transferred by the fine particle circulation transfer means (27) and supplied to the electric field region (23). The fine particles (4) can always be supplied to the electric field region (23) in an appropriate amount without excess or deficiency, and the quality can be ensured.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram schematically showing a fine particle carrying sheet manufacturing apparatus according to this embodiment.

FIG. 2A is a diagram schematically showing a cross-sectional structure of a fine particle carrying sheet produced by the fine particle carrying sheet producing apparatus according to the present embodiment, and FIGS. It is a figure which shows typically the cross-section of the particle | grain support sheet manufactured with the sheet manufacturing apparatus.

FIG. 3 (a) is a honeycomb rotor as a honeycomb structure, (b) is a honeycomb core material as a honeycomb structure,
(C) is a1 part in (a) and a2 in (b)
It is an enlarged view of a part.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fine particle carrying sheet 2 Base sheet 3 Binder layer 4 Functional fine particles 11 Binder coating device part (binder layer forming means) 12 Fine particle supplying device (fine particle supplying means) 13 Fine particle supporting device (fine particle supporting means) 20 Electrode rod 21 Power source 23 Electric field Region 24 Fine particle layer 26 Fine particle carrying chamber 27 Fine particle circulation transfer device (fine particle circulation transfer means) 28 Circulation path 29 Piping 30 Fan (fine particle transfer means) 31 Fine particle supply amount control device (fine particle supply amount control means) 32 Concentration measuring device (concentration Measuring means) 33 Control unit

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-5-212321 (JP, A) JP-A-2-119907 (JP, A) JP-A-6-246195 (JP, A) JP-A-7- 155652 (JP, A) JP 7-155521 (JP, A) JP 2002-103497 (JP, A) JP 2001-179865 (JP, A) JP 2002-127280 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B32B 31/22 B05B 5/035 B32B 5/16 B32B 9/00

Claims (5)

(57) [Claims] 1. An apparatus for producing a fine particle carrying sheet (1), wherein fine particles (4) are carried on a base sheet (2) via a binder layer (3), wherein the base sheet (2) has a binder layer (3). Adjacent to the fine particle supply means (12), a fine particle supply means (12) provided on the downstream side of the binder layer forming means (11) in the sheet moving direction, and a fine particle supply means (12). A voltage is applied between the base sheet (2) and the continuously moving base sheet (2), which is disposed in the provided fine particle carrying chamber (26), and the base sheet (2) forms the electric field region (23). The particles (4) supplied to the electric field region (23) from the particle supply means (12) are charged in a unipolar manner in the process of continuously passing through the particles, and the charged particles (4) are arranged in order by electrostatic force. Condition In this state, and with the entire base sheet (2) uniformly and densely covered, one or more fine particle layers (2
4) As a result, the fine particles (4) of the outermost layer of the fine particle layer (24) are adhered to the binder layer (3) and supported on the base sheet (2), and the shape of the fine particles layer (4) is not buried in the binder layer (3). Particulate carrying means (1), which is the particulate carrying sheet (1) partially exposed from the binder layer (3).
3) and the fine particles (4) connected to the fine particle carrying chamber (26) and floating outside the electric field region (23) and floating in the fine particle carrying chamber (26). An apparatus for producing a fine particle carrying sheet, comprising: a fine particle circulation transfer means (27) for circulating transfer to a supply means (12) side. 2. The apparatus for manufacturing a fine particle carrying sheet according to claim 1, wherein the fine particle carrying means (13) has an electrode rod () arranged in parallel with the sheet surface of the base sheet (2) at a predetermined interval. 20) and a power source (21) for applying a voltage between the electrode rod (20) and the base sheet (2). 3. The apparatus for producing a fine particle carrying sheet according to claim 1, wherein the fine particle circulating and transferring means (27) has one end on which the fine particle supplying means (1) is located on the upstream side in the sheet moving direction of the fine particle carrying chamber (26).
2) A pipe (29) having the other end connected to the downstream side of the particle carrying chamber (26) in the sheet moving direction and forming a circulation path (28), and floating in the particle carrying chamber (26). And a fine particle transfer means (30) for introducing the fine particles (4) into the pipe (29) from the downstream side in the sheet moving direction and discharging the fine particles (4) into the fine particle carrying chamber (26) from the upstream side in the sheet moving direction. An apparatus for producing a fine particle carrying sheet. 4. The apparatus for producing a fine particle carrying sheet according to claim 1, wherein the amount of fine particles (4) supplied by the fine particle supply means (12) is constant so that the amount of fine particles adhering to the binder layer (3) per unit area becomes constant. And a fine particle supply amount control means (31) for controlling increase and decrease according to the supply amount of the fine particles (4) circulated and transferred by the fine particle circulation transfer means (27) and supplied to the electric field region (23). An apparatus for manufacturing a fine particle carrying sheet. 5. The apparatus for manufacturing a fine particle carrying sheet according to claim 4, wherein the fine particle supply amount control means (31) comprises a fine particle carrying chamber (2).
6) Concentration measuring means (32) for measuring the floating concentration of fine particles (4) floating in the inside, and the supply amount of the fine particles (4) by the fine particle supplying means (12) to the measured value of the concentration measuring means (32). And a control unit (33) for controlling increase / decrease based on the above.