JPH068400A - Processing of paper surface and apparatus thereof - Google Patents

Abstract

PURPOSE:To dispense with any long and large resin film or exclusive ultraviolet- ray irradiation part and to enable various kinds of processes on the surface of a coated article such as that of printed paper or the like. CONSTITUTION:An ultraviolet ray setting resin coating material is coated on a surface of a coating medium 2 except an edge portion thereof. The coating medium 2 is fed between a pressing roller 9 which is made of a material transparent to an ultraviolet ray and detachably mounted with a transparent processing film 41 having discretionary shape of irregularities or a mat portion in such a manner that the coated surface faces to the pressing roller side. Ultraviolet rays are emitted on the coated surface through the pressing roller 9 so that the ultraviolet setting resin is set to be adhered on the coating medium 2. Outer force is added on the edge portion of the surface of the coating medium 2 to peal off it from the pressing roller 9, thereby obtaining various kinds of processed surfaces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper surface such as a printing paper surface of a sheet of paper, which is coated with an ultraviolet-curing resin coating for glossing and at the same time forms an irregular portion of an arbitrary shape or a matte surface. The present invention relates to a processing method and an apparatus thereof.

[0002]

2. Description of the Related Art Generally, the glossiness of an object to be coated such as a printing paper surface of a sheet is obtained by pressurizing the resin coating material applied on the printing paper surface to smooth the coating surface and then thermally drying the applied resin coating material. It was hardened. Therefore, such glossing of the printing paper surface requires heating with steam or the like and cooling with water or the like, which not only makes the apparatus complicated and expensive, but also increases the operating cost.

Therefore, recently, a device for solving such a point has been developed, and Japanese Patent Application Laid-Open No. 56-37398 and Japanese Patent Application Laid-Open No. 63-278847 by the present applicant are known.

In this conventional example, an ultraviolet curable resin coating material is applied to a printed paper surface or one surface of a resin film by a roll coater, and the paper and the resin film are overlapped and pressed so that the applied surface is in the middle, After that, the ultraviolet curable resin coating material is irradiated with ultraviolet rays to be cured and adhered to the printing paper surface, and then only the resin film is peeled off to polish the printing paper surface.

Further, the conventional example of the present applicant uses a roll coater to apply the ultraviolet curable resin coating on the printing paper surface or the resin film, whereas the conventional example of Enables partial application of UV curable resin paint on the surface of printing paper. Therefore, the applicant of the present invention can provide a glue margin on the glossy surface when laminating the glossy printing paper on the surface of the box, and further press release, that is, the printing paper surface and the resin film. The UV-curable resin coating can be prevented from squeezing out from the gap and being exposed to oxygen when it is cured by irradiation with UV rays, so the UV-curable resin coating applied to the resin film can be completely applied to the printing paper surface. The resin film can be used many times because the UV-curable resin paint does not remain on the resin film.

[0006]

However, in the prior art example, since the roll coater is used to apply the ultraviolet curable resin paint to the printing paper surface or the resin film, it is necessary to paste the paste on the glossy surface of the printing paper surface. Cannot be provided, and gluing is difficult. Further, since it is difficult to prevent the pressure loss, it is difficult to continuously use the resin film.

Further, the applicant of the present invention is excellent in that a glue margin can be provided on the glossy surface of the printing paper, pressure loss can be prevented, and continuous use of the resin film is easy. However, since a long resin film is used and a dedicated ultraviolet ray irradiation section is additionally required, the apparatus system as a whole becomes complicated and the apparatus itself becomes long. In addition, it is not possible to provide a matte state even though a resin coating is provided on the printing paper surface, and it is not possible to further polish the printing paper surface and provide an uneven portion having an arbitrary shape.

Therefore, the present invention has been made in view of the above circumstances, and the advantages of the present applicant are as they are, without using a long resin film, and without separately providing a dedicated ultraviolet ray irradiating section, as a whole. It is an object of the present invention to provide a paper surface processing method and a device that can simplify the configuration, downsize the device, and perform various processing on a printing paper surface.

[0009]

In order to solve the above-mentioned problems, the paper surface processing method of the present invention applies an ultraviolet curable resin coating material to one surface of an object to be coated, such as paper, leaving an edge surface around it, and at least Between a pressure roll made of UV-transparent material and its receiving roll, with a processed film made of UV-transmissive material that has a concavo-convex part of arbitrary shape and which can be replaced. Through the coated body so that the coated surface is on the pressure roll side, and the coating surface is irradiated with ultraviolet rays through the pressure roll to cure the ultraviolet curable resin coating material and coat the coated body. It is to peel off the object to be coated from the pressure roll by applying an external force to the unattached edge surface of the object to be coated, and the processed film at that time has at least a part of the surface processed into a mat shape. Is good.

Further, the paper surface processing apparatus of the present invention applies a UV-curable resin coating material to a surface of the supplied object to be coated such as paper and the like, leaving the peripheral edge surface on one surface of the object to be coated. A coating part, consisting of a pressure roll made of an ultraviolet-transparent material and having a built-in ultraviolet irradiator, and its receiving roll, and the coating surface of the object coated by the coating part is pressed against the pressure roll side. A surface processing hardening portion for adhering and curing, and a peeling portion for peeling the object to be coated from the pressure roll by applying an external force between the pressure roll and the unattached edge surface of the object to be coated, The pressure roll is one in which at least a part of the surface of the entire peripheral surface has irregularities, and a processed film made of an ultraviolet-transparent material is replaceably attached, and the processed film at that time is at least Part of the surface is processed into a mat And that good is.

[0011]

According to the paper surface processing method having the above-mentioned structure, the ultraviolet curable resin coating material is applied to one surface of the object to be coated such as paper, leaving the peripheral edge surface, and the object to be coated is made of the ultraviolet transparent material. The coated surface of the pressure roll is passed between the pressure roll and the receiving roll so that the coated surface is on the pressure roll side, and the coated surface of the object to be coated is attached to the processed film of the pressure roll and the uneven surface of any shape is formed. To form an oxygen-free state, and in that state, the coating surface is irradiated with ultraviolet rays through a pressure roll and a processed film to cure immediately, and an external force is applied to the object to be coated to remove the coating surface from the pressure roll and a gloss surface and An uneven surface of arbitrary shape is obtained.

If at least a part of the surface of the processed film is processed into a mat, a matte resin film is formed on one surface of the object to be coated. Further, according to the paper glossing device having the above configuration, the object to be coated such as paper is supplied from the supply unit and sent to the coating unit, and the peripheral edge surface is left on one surface of the object to be coated in the coating unit. Apply the UV-curable resin coating, pass the object to be coated between the pressure roll of the surface processing and hardening section and its receiving roll, and attach the coating surface of the object to the processed film side of the pressure roll and optionally An uneven surface is formed into an oxygen-free state, and in that state, the coating surface is irradiated with ultraviolet rays through a pressure roll and a processing film by an ultraviolet irradiation machine to cure immediately, and the peeling section separates the pressure roll and the object to be coated. An external force is applied between the non-adhered edge surface and the coated surface of the object to be coated is peeled off from the pressure roll to obtain a polished surface and an irregular surface having an arbitrary shape.

When at least a part of the surface of the processed film is processed into a mat, a matte resin film is formed on one surface of the object to be coated.

[0014]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side view showing a paper surface processing apparatus embodying the method of the present invention, FIG. 2 is a side view showing a coating portion of the paper surface processing apparatus, and FIG. 3 is a plan view showing a state in which an ultraviolet curable resin paint is applied to an object to be coated. 4 and 5 are side views showing the surface work hardening part of the paper surface working apparatus.

Next, the method of the present invention will be described with reference to a paper surface processing apparatus embodying the method. In the drawing, reference numeral 1 denotes a paper surface processing apparatus, which includes a supply unit 3 for supplying an object to be coated 2 such as paper, and a peripheral surface 5 on one surface 4 of the object to be coated 2 supplied. A coating section 7 for applying an ultraviolet curable resin coating (hereinafter simply referred to as UV coating) 6 and a pressure roll 9 made of an ultraviolet permeable material and having a built-in ultraviolet irradiator 8 and its receiving roll 10. A surface processing and curing section 12 that presses the coating surface 11 of the object 2 to be coated applied by the coating section 3 to the pressure roll 9 side to make it harden, and the pressure roll 9 and the object 2 to be coated are not attached. A peeling section 13 for peeling the article 2 to be coated from the pressure roll 9 by applying an external force between the edge surface 5 and the edge surface 5.
And become the main components.

The supply unit 3 stocks the coated objects 2 such as sheets of paper which are multicolor printed by a sheet-fed printing machine or the like, and supplies them to the coating section 7 one by one. Positioning in 2 up and down and in the width direction. Then, a plate roll on which the plate 20 of the coating unit 7 described in detail below is mounted
The coating part 7 and the supplying part 3 are electrically or mechanically coupled so that the supplying part 3 supplies one piece of the object 2 to be coated when the 23 rotates once.

The coating part 7 is a plate 20 for applying the UV paint 6 on the one surface 4 of the object 2 to be coated, leaving the peripheral edge surface 5 around the surface.
And at least kneading rolls 21 and 22 for supplying the plate 20 with the UV paint 6 substantially uniformly. The plate 20 is mounted on a plate roll 23, the UV paint 6 kneaded by the kneading rolls 21 and 22 is transferred onto the plate 20, and the object 2 to be coated is placed between the plate roll 23 and a backup roll 24 which is in contact with the plate roll 23. In the process of passing, the application surface 11 of the UV paint 6 is formed on the one surface 4 of the object 2 to be coated, leaving the peripheral edge surface 5 as described above (see FIG. 2). At this time, if the shape of the surface of the plate 20 is such that the UV paint 6 is applied to one surface 4 of the object 2 to be coated, leaving the peripheral edge surface 5 as shown in FIG. If the UV coating 6 is applied to the one surface 4 of the body 2, and if the surface shape of the plate 20 also leaves a margin for gluing, the UV coating 6 is applied to that shape. Therefore, depending on the surface shape of the plate 20, it is possible to form a coating surface of any shape on the one surface 4 of the object 2 to be coated.

In FIG. 2, 25 is UV on the kneading rolls 21 and 22.
Pipes for supplying the paint 6, 26 and 27 are receiving covers for preventing the UV paint 6 from dripping on other parts, and 28 and 28 are pressing rolls for the article 2 to be coated. is there.

The surface processing and hardening section 12 forms a coating surface 11 on the coating object 2 by the coating section 7, and then attaches the coating surface 11 on the coating object 2 conveyed by the conveyor 30 to the pressure roll 9. An oxygen-free state is revealed, and the coating surface 11 is cured by the ultraviolet irradiation device 8. Pressure roll 9
Has a mirror-finished roll surface. A part of the surface of the pressure roll 9 has an uneven portion 40 having an arbitrary shape, and a processed film 41 made of an ultraviolet-transmissive material is replaceably attached. As the processed film 41, a transparent film such as polypropylene, polyethylene terephthalate, or polyethylene is usually used.

Further, there are various processing film 41 as shown in FIGS. Processed film 41a shown in FIG.
The irregularities 40 having an arbitrary shape are regularly arranged on the entire surface thereof, and the processed film 41b shown in FIG. 6 has irregularities 40 having an arbitrary shape arranged on a part thereof and the rest is a mirror surface 42. There is something.

The processed film 41c shown in FIG. 7 has a matte surface 43 on its entire surface. By using this processed film 41c, the entire coated surface 11 of the article 2 to be coated forms a resin film. However, it becomes matt, does not become difficult to see due to reflection, has a good texture, is less prone to fingerprints, dirt is not conspicuous, and it has good results such as being resistant to water. Further, the processed film 41d shown in FIG. 8 has a matte part 43 in its part and a mirror surface 42 in the rest.

Further, the receiving roll 10 of the pressure roll 9 described above.
An elastic material such as a rubber plate is wound around the roll surface so that the contact portion between the pressure roll 9 and the receiving roll 10 has a constant width instead of a line. This is necessary to temporarily keep the application surface 11 of the UV paint 6 described above in an oxygen-free state.

As the pressure roll 9, as described above, an ultraviolet ray transmissive material, for example, quartz glass having a high ultraviolet ray transmissivity is used. Ordinary soda glass or transparent resin may be used, but in this case, since the ultraviolet ray transmission is poor, in order to obtain the same performance as quartz glass, the ultraviolet ray irradiation capacity of the ultraviolet ray irradiation device 8 must be increased.
An ultraviolet irradiator 8 is built in the pressure roll 9 as shown in FIG. This UV irradiator 8
Normally, it is one light, and after the coating surface 11 of the object 2 to be coated adheres to the mirror surface of the pressure roll 9 and becomes oxygen-free, the coating surface 11 is irradiated with ultraviolet rays. Is. At this time, the UV paint 6 on the application surface 11 is instantly hardened, and the unpainted portion of the UV paint 6 on the peripheral edge surface 5 of the object 2 to be coated, for example, about 5 to 10 mm. Even if the object 2 to be coated having the coating surface 11 between the receiving roll 10 and the receiving roller 10 is passed between the object 2 to be coated and the roll surface of the pressure roll 9, U
The V paint 6 does not squeeze out. Therefore, when the UV paint 6 is in the aerobic state (when the UV paint is irradiated in the anoxic state to cure the UV paint, the UV paint 6 is irradiated in the aerobic state to emit the UV light.
It is generally known that it cures about 4 to 5 times faster than when a paint is cured. In this case, the UV paint 6 in an insufficiently cured state does not remain on the roll surface of the pressure roll 9.

The ultraviolet irradiator 8 can be installed outside the pressure roll 9. The peeling section 13 is provided with a nozzle 32 on a pipe 31 installed in parallel with the pressure roll 9,
The blowing direction of the nozzle 32 is the pressure roll 9 and the object 2 to be coated.
The external force is applied by blowing air from the pressure source connected to the pipe 31 through the nozzle 32 toward the non-attached peripheral edge 5. The objects to be coated 2 peeled off from the roll surface of the pressure roll 9 are collected in the paper discharge chute 33.

Next, a paper surface processing method by the paper surface processing apparatus 1 having the above configuration will be described. First, necessary maintenance is performed, and the article to be coated 2 such as a multi-color sheet printed by a sheet-fed printing machine is set in the supply unit 3.

Next, the objects to be coated 2 are supplied one by one by the supply unit 3.
Is supplied to the coating section 7 by the pressing rollers 28, 28, and the article 2 to be coated is passed between the plate roll 23 and the backup roll 24 of the coating section 7. At this time, the UV paint 6 is a pipe
25 is supplied between the kneading rollers 21 and 22, and the kneading roller 2
The UV paint 6 is kneaded and evenly spread by 1 and 22, and further transferred to the plate plate 20 mounted on the plate roll 23, and one coating object 2 is provided every time the plate roll 23 rotates once. Since they are supplied one by one, the UV paint 6 is transferred from the plate 20 to the object 2 to be coated one by one. In this case, the object to be coated 2
The UV paint 6 is left on its one surface 4 with the peripheral edge surface 5 left.
The coated surface 11 of is formed. The coated object 2 on which the coating surface 11 is formed is conveyed by the conveyor 30, is sent to the surface processing and curing section 12, and is passed between the pressure roll 9 and the receiving roll 10.
The coated surface 11 of the body 2 to be coated on the processed film 41 of the pressure roll 9
And the coated surface 11 has various shapes of the processed film 41, for example, processed films 41a, 41b, 41c, 41d.
The surface is processed by the above to become anoxic. And
The ultraviolet irradiator 8 irradiates the coated surface 11 with ultraviolet rays through the pressure roll 9 and the processed film 41, and immediately UV coating 6
And the air is blown from the nozzle 32 of the pipe 31 in the peeling section 13 between the pressure roll 9 and the unattached edge surface 5 of the object to be coated 2 to apply the object 2 to be coated from the pressure roll 9. The surface 11 can be peeled off to form various processed surfaces on the surface of the object 2 to be coated.

According to the above-mentioned embodiment, even if a long resin film is not used and an ultraviolet ray irradiating portion is not separately provided, not only the glossy surface but also various kinds of surface can be applied to the object to be coated as in the conventional example. A processed surface can be formed, and there are the following effects. ． No heat drying is required because 100% UV paint is used. ． No leveling zone or heating at the application stage is required to eliminate uneven coating.

.. Since there is no oxygen damage when curing the UV paint, the UV irradiation efficiency is 3 to 4 times better than the conventional one. ． As a result of ,,, it is energy saving compared with the conventional UV coating method. ． The uncured UV paint does not adhere to the processed film surface of the pressure roll, and the roll does not get dirty. ． Various surface treatments that cannot be obtained by just coating are possible.

[0029]

As described above in detail, according to the paper surface processing method of the present invention, the ultraviolet curable resin coating material is applied to one surface of the object to be coated such as paper, leaving the peripheral edge surface, and then the object to be coated. The body is made of a UV-transparent material and is passed between the pressure roll and the receiving roll so that the coating surface is on the pressure roll side, and the coating surface of the coated object is attached to the processed film of the pressure roll. And form an uneven surface of arbitrary shape to make it oxygen free, and in that state irradiate ultraviolet rays through the pressure roll and processed film to the coating surface to cure immediately and apply external force to the object to be coated from the pressure roller. The surface is peeled off to obtain a polished surface and an uneven surface having an arbitrary shape. Therefore, even if it does not use a long resin film, and has a simple structure as a whole without providing a separate UV irradiation part, it is equivalent to or more than the paper surface glazing method using a conventional UV curable resin paint for the object to be coated. It is possible to form a polished surface and to form irregularities of any shape.

When at least a part of the surface of the processed film is processed into a mat, a matte resin film is formed on one surface of the object to be coated. Therefore, the matte coated object does not become difficult to see due to reflection, has a good texture, is less likely to have fingerprints, is not conspicuously contaminated, and is highly resistant to water.

Further, the paper surface processing apparatus embodying these methods can efficiently perform paper surface processing.

[Brief description of drawings]

FIG. 1 is a side view showing a paper surface processing apparatus embodying the method of the present invention.

FIG. 2 is a side view showing a coating section of the paper surface processing apparatus.

FIG. 3 is a plan view showing a state where an ultraviolet curable resin coating material is applied to the object to be coated.

FIG. 4 is a side view showing a surface work hardening portion of the paper surface working apparatus.

FIG. 5 is a plan view showing a processed film.

FIG. 6 is a plan view showing a processed film.

FIG. 7 is a plan view showing a processed film.

FIG. 8 is a plan view showing a processed film.

[Explanation of symbols]

1 Paper surface processing device 2 Coating object 3 Supply part 4 One side 5 Edge surface 6 UV curable resin paint 7 Coating part 8 UV irradiation machine 9 Pressure roll 10 Receiving roll 11 Coating surface 12 Surface processing hardening part 13 Peeling part 20 Plate plate 40 Uneven parts 41, 41a, 41b, 41c, 41d Processed film 43 Matte

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location D21H 25/00 7199-3B D21H 1/48

Claims (4)

[Claims] 1. A UV-curable resin coating is applied to one surface of an object to be coated, such as paper, leaving a peripheral edge surface, and at least a part of the surface is made of an ultraviolet-transparent material having irregularities in an arbitrary shape. The manufactured film is attached so that it can be replaced, and the coated object is passed between the pressure roll made of an ultraviolet-transparent material and the receiving roll so that the coated surface is on the pressure roll side. , Irradiating the coating surface with ultraviolet rays through the pressure roll, curing the ultraviolet curable resin coating material to adhere to the object to be coated, and applying an external force to the unattached edge surface of the object to be coated, A method for processing a paper surface, which comprises peeling the object to be coated from a pressure roll. 2. The paper surface processing method according to claim 1, wherein at least a part of the surface of the processed film is processed into a matte shape. 3. A supply unit for supplying an object to be coated such as paper,
From the coating part that applies the ultraviolet curable resin paint leaving the peripheral edge surface on one side of the supplied object to be coated, the pressure roll made of the ultraviolet transmissive material and incorporating the ultraviolet irradiator, and the receiving roll And a surface processing and curing section that presses the coating surface of the object to be coated applied by the coating section to the pressure roll side to adhere and cure it, and the edge surface of the pressure roll and the unattached edge surface of the object to be coated. It consists of a peeling portion for peeling the object to be coated from the pressure roll by applying an external force between the pressure roll, and at least a part of the surface of the pressure roll has an uneven portion on the ultraviolet transparent material. A paper surface processing device characterized in that the processed film produced by the above is replaceably attached. 4. The paper surface processing apparatus according to claim 3, wherein at least a part of the surface of the processed film is processed into a mat shape.