JPH07213972A - Applicator for surface protection layer of card - Google Patents

Abstract

PURPOSE:To improve card-making efficiency by increasing application speed without disturbing stable and uniform application with an applicator by keeping the viscosity of an application liquid at a specified value during the application in a method for forming a surface protection layer in which a transferred card is contacted with an application head to apply a UV-setting resin on the surface of the card. CONSTITUTION:A surface protection layer is formed by applying a UV-setting resin on the surface of a card 11 as a material to be coated by contacting the card 11, which has been transferred on a conveyer 20 as a transfer means, with an application head 110 having an application member comprising a porous body and a fibrous material or a fibrous fabric. In the applicator, the viscosity of an application liquid is kept at a constant value in a range of 10-50cp during the application. As a result a stable and uniform application with an application speed increased up to five times is made possible. Especially, the heating of the application liquid can be conducted simply by heating only an application head part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating device for uniformly applying a surface protective layer on the surface of small cards such as licenses and ID cards.

[0002]

2. Description of the Related Art As a method for forming a protective layer by coating a resin on the surface of a card and drying the resin, JP-A-2-268864 is known.
There is a method using a roll coating method as described in No. 1, but it takes time and labor such as roll cleaning, and sometimes the liquid is zeroed during cleaning.

As a coating method excellent in maintainability, a card surface protective layer is coated by bringing a card conveyed on a conveyor into contact with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric. There is a way to do it.

[0004]

However, the UV-curable resin is exuded from a coating member made of a porous material, a fibrous material or a fibrous woven material and directly transferred to a card as an object to be coated to form a card surface protective layer. In the coating device that forms, when the viscosity of the coating liquid becomes high at 70 cp or more, the flow resistance generated when passing through the coating member deteriorates the exudation of the coating liquid, and there are no vertical stripes or exudation on the surface of the coating film. It may not be applied. Further, the higher the viscosity of the coating liquid, the more likely it is that it becomes difficult to increase the coating speed due to the generation of vertical stripes. Further, the coating finish differs due to the change in viscosity due to the change in environmental temperature, which makes it difficult to produce a uniform product.

Further, in a coating method in which a card surface protective layer is formed by exuding a UV curable resin from a coating member made of a porous material, a fibrous substance or a fibrous woven fabric and transferring it directly to a card as an object to be coated, The coating section is fixed in the card advancing direction, and the coating is performed by contacting / separating with the conveyed card as an object to be coated, so that the conveying speed of the card is equal to the coating speed. In order to obtain good coating surface properties with this method, the coating speed should be 5 mm / se
It had to be less than or equal to c. With this, the coating speed becomes too low, and the processing capacity per hour must be kept low.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a card surface protective layer coating apparatus in which the above-mentioned drawbacks are improved so that such a coating apparatus is more stable and a good coating surface can be obtained at high speed. To do.

[0007]

This object is achieved by any one of the following technical means a to k.

(A) By contacting a card as an object to be coated, which has been conveyed on a conveyor as a conveying means, with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, In a coating apparatus for coating a surface of a card as an object to be coated with a UV curable resin to form a surface protective layer, the viscosity of the coating liquid at the time of coating is maintained at a constant viscosity within the range of 10 to 50 cp. Protective layer coating device.

(B) The card surface protective layer coating apparatus according to item (a), wherein the viscosity of the coating liquid is kept constant by heating the coating liquid.

(C) The card surface protective layer coating apparatus according to item (b), wherein the viscosity of the coating liquid is kept constant by heating only the coating head.

(D) By contacting a card as an object to be coated, which has been transported on a conveyor as a transporting means, with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, In a coating device for coating a protective layer as a coating liquid on the surface of a card as an object to be coated,
An apparatus for coating a card surface protective layer, characterized in that the coating head is lowered during coating and the coating head is also moved in the traveling direction of the card while being in contact with the card.

(E) By contacting a card as an object to be coated, which has been transported on a conveyor as a transporting means, with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, In a coating device for coating a surface of a card as an object to be coated with a protective layer as a coating liquid, the coating member makes contact with the peripheral surface of the lower part of the coating head while coating and also contacts the card in the traveling direction of the card. A coating device for a card surface protective layer, characterized in that the coating solution is applied to the card while moving.

(F) By contacting a card as an object to be coated, which has been transported on a conveyor as a transporting means, with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, In a coating device for coating a protective layer as a coating liquid on the surface of a card as an object to be coated,
During coating, the coating head moves down in the traveling direction of the card while the coating head descends and contacts the card, and the viscosity of the coating liquid during coating is kept constant within the range of 10 to 50 cp. An apparatus for coating a card surface protective layer, characterized by the above.

(G) By contacting a card as an object to be coated, which has been conveyed on a conveyor as a conveying means, with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, In a coating device for coating a protective layer as a coating liquid on the surface of a card as an object to be coated,
During coating, the coating head moves down in the advancing direction of the card while the coating head is in contact with the card, and the coating liquid viscosity is 10 to 50 cp by heating the coating liquid during coating. An apparatus for applying a card surface protective layer, characterized in that the viscosity is kept constant within the range.

(H) By contacting a card as an object to be coated, which has been conveyed on a conveyor as a conveying means, with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, In a coating device for coating a protective layer as a coating liquid on the surface of a card as an object to be coated,
During coating, the coating head is lowered so that the coating head also moves in the advancing direction of the card while being in contact with the card, and at the time of coating, the coating head is heated to increase the viscosity of the coating liquid to 10 to 10. An apparatus for coating a card surface protective layer, characterized in that a constant viscosity within a range of 50 cp is maintained.

(I) By contacting a card as an object to be coated, which has been transported on a conveyor as a transporting means, with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, In a coating device for coating a surface of a card as an object to be coated with a protective layer as a coating liquid, the coating member makes contact with the peripheral surface of the lower part of the coating head while coating and also contacts the card in the traveling direction of the card. And apply the coating liquid to the card while moving,
Moreover, the coating device for the card surface protective layer is characterized in that the viscosity of the coating liquid at the time of coating is kept constant within the range of 10 to 50 cp.

(J) By contacting a card as an object to be coated, which has been transported on a conveyor as a transporting means, with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, In a coating device for coating a surface of a card as an object to be coated with a protective layer as a coating liquid, the coating member makes contact with the peripheral surface of the lower part of the coating head while coating and also contacts the card in the traveling direction of the card. And apply the coating liquid to the card while moving,
In addition, the viscosity of the coating liquid can be increased by heating the coating liquid during coating.
An apparatus for coating a card surface protective layer, characterized in that a constant viscosity within the range of 10 to 50 cp is maintained.

(K) By contacting a card as an object to be coated, which has been conveyed on a conveyor as a conveying means, with a coating head having a coating member made of a porous body, a fibrous material or a fibrous woven fabric, In a coating device for coating a surface of a card as an object to be coated with a protective layer as a coating liquid, the coating member makes contact with the peripheral surface of the lower part of the coating head while coating and also contacts the card in the traveling direction of the card. And apply the coating liquid to the card while moving,
A coating device for a card surface protective layer, characterized in that the coating liquid viscosity is maintained at a constant viscosity within the range of 10 to 50 cp by heating the coating head during coating.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In describing an embodiment of a coating apparatus of the present invention, first, a basic structure will be described with reference to FIGS. 1 to 7, and then stable and uniform coating can be performed at a higher speed than ever before. For this reason, embodiments of claims 1 to 3 of the means added in the present invention will be described together with its operation, and further embodiments of claims 4 to 5 will be described together with its operation with reference to FIGS.

In FIG. 1, a card 11 as an object to be coated.
Is a card feeder at a feeding position on a pallet or stage 26 connected to the belt or chain 25 of a card transport conveyor 20 consisting of an endless belt or chain 25 wound around a driving wheel 21, driven wheels 22 and 23. Cards 11 as objects to be coated are supplied and set one by one from the sheet 10 and conveyed to the coating position. The card 11 as the object to be coated can be fixed to the stage 26 by means of suction, friction, adhesion, static electricity, claw-shaped projections or the like. At the coating position, a coating unit 100 including a coating liquid tank (coating liquid reservoir) 101 and a coating unit (coating head) 110 having a coating member 107 is on standby.

The pallet or stage 26 entering the coating position is held on both sides by fixed guide rails 27 and is slidable on the guide rails 27, so that the height and width directions are accurately held. . At the coating position, the coating unit (coating head) 110 of the coating unit 100 is slightly pushed up, and the coating member 107 on the lower surface of the coating unit (coating head) 110 and the card 11 as the object to be coated on the pallet or the stage 26 in the width direction. The coating liquid 102 is supplied in a required amount from the coating liquid tank (coating liquid reservoir) 101 by being contacted with
The coating liquid 102 oozing on the coating member 107 is applied onto the moving pallet or the card 11 as the object to be coated on the stage 26 by the uniform coating liquid transfer. When the rear end of the card 11 as the object to be coated comes, the coating section (coating head)
The connection between 110 and the coating liquid tank 101 is cut off, and the coating is completed.

When the card 11 as the object to be coated reaches below the application unit (application head) 110, the coating section (coating head) descends to the head of the card 11 as the object to be coated and the card 11 as the object to be coated. Pallet or a pallet carrying the card 11 as the object to be coated such as a pallet or a stage by contacting with the card 11 and rising from the rear end of the card as the object to be coated and separating from the card 11 as the object to be coated, or It is possible to prevent the liquid from adhering to the stage 26 and the backing of the coating liquid on the back surface of the card 11 as an object to be coated.

The raising / lowering mechanism for contacting and separating the coating section (coating head) and the card 11 as the object to be coated is not limited to the method of moving the coating section (coating head) up and down, but also conveys the card 11 as the object to be coated. The pallet or stage 26 of the running conveyor may be moved up and down with the card.

As described above, the card 11 as the object to be coated does not necessarily have to be placed on the pallet or the stage 26 and may be directly conveyed on the conveyor. In this case, the up-and-down mechanism for contacting the coating unit (coating head) 110 and the card 11 as the object to be coated is designed to push up or lower the belt surface of the conveyor. Even when the card 11 as the object to be coated is directly conveyed on the conveyor, the vertical mechanism for contacting and separating the card 11 as the object to be coated from the coating section (coating head) is The head) may be moved up and down.

When the coating section (coating head) 110 is moved up and down, the coating section (coating head) 110 and the coating liquid reservoir 101 may be separated, and only the coating section (coating head) 110 may be moved up and down. At this time, it is preferable that the coating unit (coating head) and the coating liquid reservoir be connected by a liquid feeding tube, and the coating unit (coating head) 110 and the coating liquid reservoir (coating liquid tank) 101 can be easily replaced in a cartridge type. Also, when a valve is provided between the coating liquid reservoir (coating liquid tank) 101 and the coating unit (coating head) 110, by pressing the liquid feeding tube to shut it off or back in, the cartridge replacement parts are small. Can be converted.

When the coating liquid reservoir (coating liquid tank) 101 is sealed, the internal pressure changes due to environmental temperature changes, etc., and the liquid supply to the coating unit (coating head) 110 is not constant, and stable coating cannot be performed. Therefore, the coating liquid reservoir (coating liquid tank) 101 is preferably open to the atmosphere.

Card 11 as an object to be coated after coating
Is carried to the next processing unit 30 for irradiating energy rays, where it is irradiated with ultraviolet rays or the like, and the applied material is cured and finished. Then, it is collected when it passes through the processing unit 30.

By bending the transport path of the card transport conveyor 20 as shown in FIG. 1 and installing the processing unit 30 at that position, the energy beam leaking in the lateral direction even if the shielding condition of the energy beam irradiation is a little bad. Does not solidify the portion of the coating member 107.

Further, the processing section 30 may be installed as a separate device adjacent to the coating means 100 instead of the coating device.

Next, various structures of the coating means 100 in the present invention will be described.

FIG. 2 is a side sectional view of one embodiment of the coating means 100, in which a coating liquid 102 is put into a coating liquid tank (coating liquid reservoir) 101 together with an internal member 121 and a coating portion (coating head). 110 is provided with a coating member 107A made of a fibrous material such as felt, non-woven fabric, cotton or the like, or a fibrous fabric such as velvet, suede, velvet, woven fabric, etc., and the coating liquid 102 serves as an object to be coated. It is adapted to be applied to the card 11.

A coating means 10 of another embodiment is shown in FIG.
It is a side sectional view of 0. The coating liquid tank (coating liquid reservoir) 101 and the coating portion (coating head) 110 are partitioned by upper and lower partition walls 103 to form an integrated structure, and the bottom portion is called a fibrous material, velvet, or suede as described above. An application member 107 made of a fibrous woven fabric such as velvet or woven fabric is covered. Then, as shown in FIG. 3A, the intermediate partition 103
A small taper hole 105 is formed in the center of the piston 106, and the piston 106 is dropped into the hole, so that the lower end of the piston 106 hits the inner surface of the coating member 107 and is slightly depressed. At the time of coating, the piston 106 is pushed up in the direction of the arrow through the coating member 107 of the coating section (coating head) 110 as shown in FIG. 3 (b), and the coating liquid is discharged from the gap formed between the piston 106 and the tapered hole 105. 102 oozes out. When not applied, the piston 106 descends due to the weight of the piston 106, and there is no gap with the tapered hole 105, and the exudation of the liquid stops.

Further, an internal member 121 is provided inside the coating section (coating head) 110, and the piston 106 is opened as described above as shown in FIG. The coating liquid 102 is temporarily absorbed by the internal member 121 to further prevent the liquid dripping. The amount of exudation of the coating liquid can be variously adjusted depending on the taper angle of the piston and the number of pistons. Internal member
The material of 121 is preferably a porous material such as a sponge, a fibrous material such as cotton and non-woven fabric, or a fibrous woven fabric such as woven cloth.

However, when the application member 107 is pushed up by the contact of the card 11 as the object to be coated, the card 11 as the object to be coated is moved in the traveling direction when the application is performed while the bulge due to the protrusion at the lower end of the piston 106 is received. You will receive vertical stripe-shaped uneven application in the middle. This is prevented by a bar 108 or a net integrally provided on the lower end of the piston 106, if possible, as shown in the side sectional view of FIG. 4, whereby the coating member 107 strongly hits only the central portion. Since there is no such problem, the above-mentioned factors causing vertical stripes are eliminated, and good application becomes possible.

As another means, as shown in the side sectional view of FIG. 5, it contacts the upper portion of the coating member (coating head) 107 to balance the surface tension when the coating liquid 102 oozes out. By inserting the resistor 125 for the purpose, it is possible to eliminate the concern about the vertical streaks and to eliminate the liquid leakage phenomenon.

Further, the on-demand supply of the coating liquid 102 from the coating liquid tank (coating liquid reservoir) 101 is performed by the piston 106 as described above, but there is only one supply hole by the piston, and the piston is centered straight as it is. There is a possibility that a large amount of liquid will flow into the portion, and thick coating will be applied to the central portion and thin coating to the peripheral portion.

In order to prevent this, as shown in the side sectional view of FIG. 6A and the plan view of the partition wall 103 in FIG. 6B, the slit groove 112 is provided in the width direction from the tapered hole 105. Since the slit has a very narrow width and the liquid tends to spread to the periphery due to the capillary phenomenon, it becomes possible to achieve the uniformity of the distribution of the coating liquid in the width direction.

Similarly, in order to improve the uniformity of the distribution of the coating liquid in the width direction, FIG.
It has been confirmed that the diffusion plate 114 as shown in the plan view of FIG. 7B is arranged as shown in the side sectional view of FIG.

Further, the piston 1 is used to supply the coating liquid from the coating liquid tank (coating liquid reservoir) 101 to the coating section (coating head) 110.
In addition to step 06, an electric solenoid valve may be used, or the valve may be opened / closed by a mechanical cam drive, and a method of quantitatively supplying the liquid feeding tube with a rotary pump may be used.

As the coating member, a porous material such as sponge, fibrous material such as felt, cotton, non-woven fabric, velvet called velvet or suede, and fibrous woven fabric such as woven cloth are used. The situation is favorable. That is, uniform coating is possible, the coating finish is stable, and the appearance is good.

In the embodiments of claims 1, 2 and 3 of the present invention, when the coating apparatus as described above is used, the viscosity of the coating liquid is changed.
The viscosity of ± 2 cp with respect to a certain predetermined value within the range of 10 to 50 cp is achieved by keeping the temperature around the coating head and the coating liquid piping. Even if the room temperature of the room in which the apparatus of the present invention is used varies to some extent, the viscosity variation can be suppressed to about ± 2 cp if the temperature of the coating solution is kept constant. To suppress the variation in viscosity of the coating liquid to about ± 2 cp, use a heating device such as a heater to heat the coating liquid.
There is also a method of keeping the temperature higher than the upper limit temperature of the room temperature variation of the room in which the device of the present invention is used and keeping it constant, but in addition to this, a heating means such as a heater and a cooling means such as a fan are combined to obtain a temperature close to the room temperature. You can also keep the temperature constant. Also, the constant predetermined value of the viscosity of the coating liquid varies depending on the difference in flow resistance due to the difference in the material and physical shape of the coating member, but when using a velvet that gives a good coating finish as the coating member, the liquid viscosity should be 15 to 25 cp. It is preferable to set.

Since the UV curable resin is generally solvent-free, a diluent of the same kind as that of the UV curable resin is added to reduce the viscosity, but if a large amount of diluent is added, the curability is deteriorated or the liquid state is deteriorated. The liquid properties become unstable, such as deterioration of storage stability.
Therefore, as a specific means for reducing the viscosity of the liquid in the present invention, the coating liquid is heated to a constant temperature.

The temperature of the coating liquid can be kept for all the liquid in the coating liquid tank and the pipe coating head, but the amount of liquid transferred to one card as the coating object is extremely thin because the coating thickness is extremely thin. Since the flow of the liquid in the pipe is very gradual even with a small amount, it is possible to keep the viscosity of the liquid exuding from the coating member constant by keeping only the coating head warm.
It is possible to shorten the heat retention time until coating is possible and save energy consumption. An example of this experiment is as follows.

Application head heating Application viscosity Vertical streaks not generated Upper limit speed None 70cp 5mm / sec Yes 20cp 25mm / sec That is, the application head is heated to increase the viscosity of the coating solution from 70cp to 20cp.
In that case, the speed of stable coating is 5 times faster than before.
It is possible to get higher speed.

Next, an embodiment of claim 4 will be described.

This does not take the method of lowering the viscosity of the coating liquid as a means for increasing the coating speed, and the coating head 11
By moving 0 in the moving direction of the card 11, which is the object to be coated, and maintaining the relative speed between the two at the conventional coating speed, the substantial coating speed of the card is increased.

That is, the schematic configuration diagram of FIG. 8 and FIG.
As shown in the operation diagrams of (b) and (c), the coating head 11
0 is lowered in the direction of arrow A from the ascending position in response to the movement of the card 11 on the conveyor, and after contacting with the card 11, it is moved in the same direction of arrow B as the card and becomes the rear end of the card 11. When they match, the ascending movement is started in the direction of the arrow C, and the moving cycle is ended by returning from the ascending position to the ascending position of the starting position in the direction of the arrow D. I am going to do it.

Next, the results of coating experiments according to this example are shown below.

That is, when an epoxy ultraviolet curing resin is used as a coating liquid and a target thickness of 10 μm is applied to a PET card having a thickness of 500 μm by the above-mentioned coating device, the card conveying speed is 2
Good coating surface properties were obtained at 0 mm / sec and a moving speed of the coating head 110 of 15 mm / sec.

As a comparative example, a resin similar to the above is fixed to the coating head 110 and the coating member 107, and no movement in the card direction is made.
When coated at 10 μm, vertical streaks were generated on the coated surface at a transport speed of 5 mm / sec or more, and the appearance of the finished card was impaired.

Next, an embodiment of claim 5 will be described with reference to the side view of FIG.

After the coating section 110 comes into contact with the tip of the card 11 that has been transported horizontally in the transport path 25, the coating member is wound endlessly between the coating head 110, the guide roller 162, and the drive roller 161. The belt of 107 starts rotating in the traveling direction of the card 11, and when the contact with the rear end of the card ends, the rotation of the coating member 107 is stopped and the supply of the coating liquid 102 from the coating liquid reservoir 101 is stopped. It is the one.
If the difference between the horizontal conveyance speed of the card and the conveyance speed of the coating member 107 is 5 mm / sec or less, the card 11
As in the case of the previous embodiment, even if the sheet is conveyed at a high speed, a good and stable coating surface can be obtained, and high-speed coating can be realized.

Another embodiment of claim 5 is shown in FIG.
This will be described with reference to the operation side views of (b), (c) and (d).

The coating member 107 is wound between the coating section (coating head) 110 and the take-up / unwinding shafts 151 and 155 on both sides, and the state shown in FIG. The tip of the card 11 is wound up so that the tip of the card reaches the coating section 110 and the belt of the coating member 107 moves in the same direction as the advance of the card 11 after the time set by the timer is finished (b). When it reaches the rear end of the card 11 after being taken up by the unwinding shaft 151, the winding of the shaft 151 is stopped.
The film is rewound back to its original position by winding up.

This gives the card 11 as in the previous embodiment.
It becomes possible to increase the moving speed of the same as in the previous embodiment.

Further, the embodiments of claims 6 to 8 are embodiments of an apparatus in which any one of the embodiments of claims 1 to 3 is combined with the embodiment of claim 4, and the embodiments of claims 9 to 11 are Is claim 5
It is an embodiment of an apparatus in which any one of the embodiments of claims 1 to 3 is combined with the above embodiment.

That is, when the viscosity of the coating head 110 is moved in the moving direction of the card 11 and the viscosity of the coating head 110 is lowered, the coating member 107 is provided so as to run outside the coating head 110.
In the form of a belt and moving it in the direction of the card 11 in order to improve the moving speed of the card, that is, the substantial production speed.

In the former embodiment, the moving speed of the coating head 110 is 25 mm / sec in each of the latter embodiments, and the conveying speed of the card 11 is 50 mm.
As the surface coating of the ultraviolet curable resin as in each of the above examples, raising the temperature of the coating liquid so that the viscosity becomes 70 cp,
When the coating head and the coating member were heated, the smooth uniform coating was stably obtained without the occurrence of streaking and thick film on the trailing edge.

As a result, the conventional card production speed of 5 mm /
The card production speed was 10 times faster than sec.

[0060]

By maintaining the viscosity of the coating liquid of the present invention at a predetermined value within a predetermined range, stable uniform coating with a coating speed increased up to about 5 times can be realized.

In particular, the heating of the coating liquid is not so extensive, and the heating of the portion of the coating head makes it possible to realize it sufficiently easily.

Further, as another means of the present invention, only by moving only the coating head or the coating member in the same direction as the card, the movement of the card can be sped up and high speed coating with high efficiency can be realized. It was

Further, by combining both means, it became possible to improve the production rate of coating up to 10 times.

[Brief description of drawings]

FIG. 1 is a schematic side view of the overall configuration of an embodiment of the present invention.

FIG. 2 is a side sectional view of an example of a coating head.

FIG. 3 is a side sectional view showing an example of a coating head.

FIG. 4 is a partial side sectional view showing an example of a coating head.

FIG. 5 is a partial side sectional view showing an example of a coating head.

FIG. 6 is a diagram showing slit grooves of a coating head.

FIG. 7 is a diagram showing a diffusion plate of a coating head.

FIG. 8 is a schematic configuration diagram showing a movement cycle of a coating head.

FIG. 9 is an operation side view showing the movement of the coating head.

FIG. 10 is a side view showing the movement of the coating member with respect to the coating head.

FIG. 11 is an operation side view showing the movement of the coating member and the movement of the card with respect to the coating head.

[Explanation of symbols]

 11 card 20 card conveyer 100 coating means 107 coating member 110 coating section (coating head) 130 sensor 151, 152 take-up and unwinding section 161 drive roller 162 guide roller

Claims (11)

[Claims] 1. A card as an article to be coated, which has been transported on a conveyor as a transporting means, and a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, are brought into contact with each other. In a coating device for coating a surface of a card as a coating material with a UV curable resin to form a surface protective layer, the coating liquid viscosity at the time of coating is maintained at a constant viscosity within the range of 10 to 50 cp. Layer coating equipment. 2. The card surface protective layer coating apparatus according to claim 1, wherein the viscosity of the coating liquid is kept constant by heating the coating liquid. 3. The card surface protective layer coating apparatus according to claim 2, wherein the coating liquid viscosity is kept constant by heating only the coating head. 4. A card as an object to be coated, which has been transported on a conveyor as a transporting means, and a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven material, are brought into contact with each other, thereby coating the coated material. In a coating device for coating a surface of a card as a coating material with a protective layer as a coating liquid, the coating head is lowered during coating so that the coating head also moves in the traveling direction of the card while being in contact with the card. An apparatus for coating a card surface protective layer, which is characterized in that 5. A card as an object to be coated, which has been transported on a conveyor as a transporting unit, is brought into contact with a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric to bring the card into contact. In a coating device that coats a surface of a card as a coating material with a protective layer as a coating liquid, during coating, the coating member contacts the peripheral surface of the lower portion of the coating head and also contacts the card in the traveling direction of the card. An apparatus for coating a card surface protective layer, characterized in that the coating solution is applied to the card while moving. 6. A card as an article to be coated, which has been transported on a conveyor as a transporting means, and a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven material, are brought into contact with each other, thereby coating the coated material. In a coating device for coating a surface of a card as a coating material with a protective layer as a coating liquid, the coating head is lowered during coating so that the coating head also moves in the traveling direction of the card while being in contact with the card. ,
Moreover, the coating device for the card surface protective layer is characterized in that the viscosity of the coating liquid at the time of coating is kept constant within the range of 10 to 50 cp. 7. A card as an object to be coated, which has been transported on a conveyor as a transporting means, and a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven material, are brought into contact with each other, thereby causing In a coating device for coating a surface of a card as a coating material with a protective layer as a coating liquid, the coating head is lowered during coating so that the coating head also moves in the traveling direction of the card while being in contact with the card. ,
Moreover, the viscosity of the coating solution can be increased by heating the coating solution during coating.
An apparatus for coating a card surface protective layer, characterized in that a constant viscosity within the range of 10 to 50 cp is maintained. 8. A card as an object to be coated, which has been transported on a conveyor as a transporting means, and a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, are brought into contact with each other. In a coating device for coating a surface of a card as a coating material with a protective layer as a coating liquid, the coating head is lowered during coating so that the coating head also moves in the traveling direction of the card while being in contact with the card. ,
A coating device for a card surface protective layer, characterized in that the coating liquid viscosity is maintained at a constant viscosity within the range of 10 to 50 cp by heating the coating head during coating. 9. A card as an article to be coated, which has been transported on a conveyor as a transporting means, and a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, are brought into contact with each other. In a coating device that coats a surface of a card as a coating material with a protective layer as a coating liquid, during coating, the coating member contacts the peripheral surface of the lower portion of the coating head and also contacts the card in the traveling direction of the card. Apply the coating liquid to the card while moving, and
An apparatus for coating a card surface protective layer, characterized in that the viscosity of the coating liquid during coating is kept constant within the range of 10 to 50 cp. 10. A card as an object to be coated, which has been transported on a conveyor as a transporting means, and a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, are brought into contact with each other, thereby causing In a coating device for coating the surface of a card as a coating material with a protective layer as a coating liquid,
At the time of coating, the coating liquid is applied to the card while the coating member is in contact with the peripheral surface of the lower portion of the coating head and also in contact with the card in the traveling direction of the card, and the coating liquid is coated at the time of coating. By heating, the viscosity of the coating solution is reduced to 10
An apparatus for coating a card surface protective layer, characterized in that a constant viscosity within a range of -50 cp is maintained. 11. A card as an object to be coated, which has been transported on a conveyor as a transporting means, and a coating head having a coating member made of a porous material, a fibrous material or a fibrous woven fabric, are brought into contact with each other, thereby causing In a coating device for coating the surface of a card as a coating material with a protective layer as a coating liquid,
At the time of coating, the coating member is in contact with the peripheral surface of the lower portion of the coating head so that the coating liquid is coated on the card while moving in contact with the card in the traveling direction of the card, and at the time of coating, the coating head is coated. An apparatus for coating a card surface protective layer, characterized in that the viscosity of the coating liquid is maintained at a constant value within the range of 10 to 50 cp by heating.