JP2016073953A - Method for manufacturing housing material and housing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a housing material which prevents lowering of an adhesion of a paint due to UV over-irradiation.SOLUTION: A method for manufacturing a housing material includes: a process in which an undercoat layer 2 is formed from an ultraviolet curable undercoat material 2p which is coated on a surface of a flat plate-like base material 1 having a groove part A and a flat part B has a first curing wavelength region as a wavelength region in which photopolymerization is started; and a process in which a decorative layer (3, 4) is formed from an ultraviolet curable decorative material (3p, 4p) which is coated on a surface of the undercoat layer 2 in the groove part A by an ink jet device and has a second curing wavelength region as a wavelength region, in which photopolymerization is started, which is different from the first curing wavelength region.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a building material and a building material for testing the breaking strength of a semiconductor material.

  Conventionally, when coating is applied to joint grooves formed on the surface of a flat substrate in the manufacturing process of building materials, the groove and other surfaces are painted at once with a roll coater, and only the surface coating is applied. A method of removing with a roller is known. This method has a problem that it is difficult to completely remove the paint on the surface and that many paints are wasted. On the other hand, the technique which saves a coating material by coating a joint groove using an inkjet nozzle is proposed (refer patent document 1).

JP 2012-224005 A

  However, in the case of using an ultraviolet (UV) curable coating material, UV is irradiated to the surface other than the joint groove at the time of UV curing. The base material is generally subjected to sealing treatment (undercoating) before inkjet coating, but when the sealing material (undercoating material) is UV curable, the sealing material is over-irradiated during UV curing of inkjet coating. It becomes a state. When the sealing material is in an over-irradiated state, there is a problem that the adhesion between the coating material applied thereafter and the sealing material on the surface other than the joint groove is lowered.

  In view of the above problems, an object of the present invention is to provide a building material manufacturing method and a building material that prevent a decrease in paint adhesion due to UV over-irradiation.

  In order to achieve the above object, the manufacturing method of a building material according to the first aspect of the present invention is applied as a wavelength region for starting photopolymerization applied to the surface of a flat substrate having a groove and a flat part. A step of forming an undercoat layer from an ultraviolet curable undercoat material having one cure wavelength region, and a first cure wavelength region applied as a wavelength region for starting photopolymerization applied to the surface of the undercoat layer in the groove by an inkjet device; And a step of forming a decorative layer from an ultraviolet curable decorative material having a different second curing wavelength region.

  The building material which concerns on the 2nd aspect of this invention is the ultraviolet-ray which has a 1st hardening wavelength area | region as a wavelength area | region which starts the photopolymerization applied to the flat base material which has a groove part and a flat part, and the surface of the base material. An undercoat layer formed from a curable undercoat material, and a second cure wavelength region different from the first cure wavelength region as a wavelength region for starting photopolymerization applied to the surface of the undercoat layer in the groove by an inkjet device The gist of the invention is to provide a decorative layer formed from an ultraviolet curable decorative material.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method and building material of a building material which prevent the fall of the adhesiveness of the coating material by UV over irradiation can be provided by using UV hardening type material which has a different hardening wavelength range.

It is typical sectional drawing explaining the fundamental structure of the building material which concerns on embodiment of this invention. It is a flowchart explaining the manufacturing method of the building material which concerns on embodiment of this invention. It is a perspective view which demonstrates a mode that a coating material is apply | coated with a roll coater in the manufacturing method of the building material which concerns on embodiment of this invention centering on a base material. It is sectional drawing explaining a mode that an ultraviolet-ray is irradiated with a light source in the manufacturing method of the building material which concerns on embodiment of this invention centering on a base material. It is sectional drawing explaining a mode that a coating material is apply | coated with an inkjet apparatus in the manufacturing method of the building material which concerns on embodiment of this invention centering on a base material. It is sectional drawing explaining a mode that an ultraviolet-ray is irradiated with a light source in the manufacturing method of the building material which concerns on embodiment of this invention centering on a base material. It is sectional drawing explaining a mode that a coating material is apply | coated with a roll coater in the manufacturing method of the building material which concerns on embodiment of this invention centering on a base material. It is an example which illustrated the molecular extinction coefficient for every wavelength of UV of the photoinitiator which can be used in the manufacturing method of the building material which concerns on embodiment of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals, and redundant description is omitted. It should be noted that the drawings are schematic, and the relationship between thickness and planar dimensions is different from the actual one. Further, the technical idea of the present invention does not specify the material, shape, structure, arrangement, etc. of the component parts as follows, and various modifications can be made within the technical scope described in the claims. Can be added.

(Building materials)
As shown in FIG. 1, the building material according to the embodiment of the present invention includes a wooden base material 1 including a substrate 11 and a decorative board 12, an undercoat layer (sealing layer) 2, a first decorative layer 3, and The decorative layer (3, 4) which consists of the 2nd decorative layer 4, the intermediate coating layer (protective layer) 5, and the top coating layer 6 are provided. The building material which concerns on embodiment of this invention is flat form, and has the groove part A used as a joint groove, and the flat part B except the groove part A on one side. In the example shown in FIG. 1, the groove portion A has a V-shaped cross section, but may be formed to have a flat bottom surface even in a rounded U shape.

  The board | substrate 11 is formed from the medium density fiber board (MDF) which is a flat plate, for example. The decorative board 12 is formed from a veneer, for example. The decorative plate 12 is formed on the entire surface of the flat portion B of the substrate 11. The undercoat layer 2 is formed on the surface of the substrate 11 in the groove portion A and the surface of the decorative plate 12 in the flat portion B, that is, on the entire surface of one side of the base material 1. The undercoat layer 2 keeps the substrate 11 and the decorative plate 12 together.

  The undercoat layer 2 is formed from an undercoat material 2p which is a UV curable paint having a first curing wavelength region. The first curing wavelength region indicates an ultraviolet wavelength region where the undercoat material 2p starts photopolymerization. The undercoat material 2p is cured by being irradiated with first ultraviolet light (UV) having a wavelength within the first curing wavelength region, and constitutes the undercoat layer 2.

  The decorative layer (3, 4) is formed on the entire surface of the undercoat layer 2 in the groove A. The first decorative layer 3 is formed as a white base for the second decorative layer 4 in the groove A, and supports the coloring of the second decorative layer 4. The second decorative layer 4 is formed on the entire surface of the first decorative layer 3 such that the decorative layer (3, 4) has the same appearance as the decorative plate 12, for example.

  The first decorative layer 3 and the second decorative layer 4 are each a first decorative material 3p that is a UV curable coating material having a second cured wavelength region that is a region of the wavelength of ultraviolet light that initiates photopolymerization. It is formed from the 2nd decorating material 4p. The 1st decorating material 3p and the 2nd decorating material 4p are hardened | cured by irradiating the 2nd ultraviolet-ray which has a wavelength in a 2nd hardening wavelength area | region. The second ultraviolet ray has substantially no wavelength within the first curing wavelength region so as not to cure the undercoat material 2p. That is, the undercoat material 2p is not cured by the second ultraviolet ray and does not substantially initiate photopolymerization.

  The intermediate coating layer 5 is formed in a thin film on the surface of the decorative layer (3, 4) in the groove portion A and the surface of the undercoat layer 2 in the flat portion B. The intermediate coating layer 5 is formed from an intermediate coating material 5p which is a UV curable coating material having a predetermined curing wavelength region. The intermediate coating layer 5 functions as a protective layer for protecting the decorative layer (3, 4) in the groove portion A and the undercoat layer 2 in the flat portion B.

  The top coat layer 6 is formed in a thin film on the surface of the intermediate coat layer 5 in the flat portion B. The topcoat layer 6 is formed from a topcoat material 6p that is a UV curable paint having a predetermined curing wavelength region. The topcoat layer 6 is formed from a topcoat material 6p appropriately selected so as to have a desired function such as a function of reducing the allergenicity of the building material and a function of adjusting gloss.

(Building material manufacturing method)
An example of the manufacturing method of the building material which concerns on embodiment of this invention is demonstrated using the flowchart of FIG.

  First, as a pretreatment, a rectangular MDF is used as a substrate 11 and a decorative plate 12 that is a protruding plate is attached to one surface of the substrate 11. Next, the substrate 11 is cut from the decorative plate 12 side by a processing tool having a cutting blade, a cutting head, a laser processing head, and the like, so that a wooden base material having a groove portion A and a flat portion B excluding the groove portion A is obtained. 1 is prepared. In addition, the peripheral part of the base material 1 on the side to which the decorative board 12 is affixed is chamfered so as to form a joint groove similar to the groove part A by being disposed adjacent to the other base material 1. The

  In step S1, as shown in FIG. 3, the primer A 2p containing the photopolymerization initiator having the first curing wavelength region is conveyed by the roll coater 71 to the belt-shaped conveyance unit 70. And applied to the surface on the flat portion B side. The roll coater 71 applies the undercoat material 2p with a roller having elasticity such as sponge or rubber so that it can come into contact with both the groove part A and the flat part B. The undercoat material 2p is a sealing material for sealing the substrate 11 and the decorative plate 12.

  In step S2, as shown in FIG. 4, the undercoat material 2p applied to the substrate 1 is irradiated with the first ultraviolet ray by the first light source 72 composed of a UV light emitting diode (UV-LED), a UV lamp, or the like. . The undercoat material 2p is cured by being irradiated with a first ultraviolet ray having a wavelength within the first curing wavelength region, and constitutes the undercoat layer 2. The undercoat layer 2 is irradiated with the first ultraviolet ray so that the polymerization reaction on the surface is not completely completed in consideration of the influence of the ultraviolet ray irradiated in the subsequent process.

  In step S <b> 3, as shown in FIG. 5, the first decorating material 3 p containing a photopolymerization initiator having a second curing wavelength region different from the first curing wavelength region is applied to the undercoat layer 2 in the groove A by the inkjet device 73. It is applied to the surface. The first decorating material 3p is a white coating material that serves as a base for the second decorating layer 4. The ink jet device 73 is a device that prints a paint on an object using ink jet technology. The ink jet device 73 accurately discharges the coating material toward the groove portion A by detecting the position of the groove portion A of the substrate 1 to be conveyed by a sensor using a laser displacement meter, an image sensor, or the like.

  In step S4, as shown in FIG. 6, the 1st decorating material 3p apply | coated to the surface of the undercoat 2 in the groove part A is irradiated with a 2nd ultraviolet-ray by the 2nd light source 74 which consists of UV-LED etc. . The 1st decorating material 3p hardens | cures by irradiating the 2nd ultraviolet-ray which has a wavelength in a 2nd hardening wavelength area | region, and comprises the 1st decorating layer 3. FIG.

  In step S5, the second decorating material 4p containing a photopolymerization initiator having a second curing wavelength region different from the first curing wavelength region is subjected to the first decoration by an ink jet device similar to the ink jet device 73 shown in FIG. It is applied to the surface of layer 3.

  In step S <b> 6, the second decorative material 4 p applied to the surface of the first decorative layer 3 is irradiated with the second ultraviolet light by the same light source as the second light source 74 shown in FIG. 6. The 2nd decorating material 4p hardens | cures by irradiating the 2nd ultraviolet-ray which has a wavelength in a 2nd hardening wavelength area | region, and comprises the 2nd decorating layer 4. FIG. The second decorative layer 4 is a pattern that is color-printed using the first decorative layer 3 as a base. The decorative layer (3, 4) has the same appearance as the decorative board 12 due to the first decorative layer 3 and the second decorative layer 4. For example, when the decorative board 12 is formed from a veneer, the decorative layer (3, 4) has the same grain as the veneer forming the decorative board 12, and the decorative board 12 has a single color tone. The color tone is the same as that of the decorative board 12.

  In step S7, as shown in FIG. 7, the intermediate coating material 5p containing the photopolymerization initiator having a predetermined curing wavelength region is decorated with a roll coater similar to the roll coater 71 shown in FIG. (3, 4) and applied to each surface of the undercoat layer 2 in the flat portion B. The roll coater 71 applies the intermediate coating material 5p with a roller having elasticity such as sponge or rubber so that it can come into contact with regions corresponding to both the groove portion A and the flat portion B.

  In step S8, the intermediate coating material 5p is irradiated with ultraviolet rays having a predetermined wavelength by a light source composed of a UV-LED, a UV lamp, or the like. The intermediate coating material 5 p is cured by being irradiated with ultraviolet rays having a predetermined wavelength, and constitutes the intermediate coating layer 5. The intermediate coating layer 5 functions as a protective layer for protecting the decorative layer (3, 4) in the groove portion A and the undercoat layer 2 in the flat portion B.

  In step S9, the top coating material 6p containing a photopolymerization initiator having a predetermined curing wavelength region is applied to the surface of the intermediate coating layer 5 in the flat portion B by a roll coater. The roller of the call coater that applies the top coat material 6p is made of, for example, a metal material, a resin material, or the like, and has such a hardness that it contacts a region corresponding to the flat portion B excluding the groove portion A.

  In step S10, the top coating material 6p is irradiated with ultraviolet rays having a predetermined wavelength by a light source composed of a UV-LED, a UV lamp, or the like. The top coating material 6 p is cured by being irradiated with ultraviolet rays having a predetermined wavelength, and constitutes the top coating layer 6. The topcoat layer 6 is formed from a topcoat material 6p appropriately selected so as to have a desired function such as a function of reducing the allergenicity of the building material and a function of adjusting gloss. By forming the topcoat layer 6, the building material according to the embodiment of the present invention is completed as shown in FIG.

  For example, as shown in FIG. 8, the photopolymerization initiator contained in the undercoat material 2p is an ultraviolet ray having a wavelength of about 260 nm, such as 1-hydroxycyclohexyl phenyl ketone and 2-hydroxy-2-methyl-1-phenylpropane. An additive having high sensitivity can be employed. For example, the photopolymerization initiator contained in the undercoat material 2p has a large molecular extinction coefficient with respect to ultraviolet rays having a wavelength of about 260 nm, for example, as compared with wavelengths in other regions. As long as the 1st ultraviolet-ray which irradiates the undercoat material 2p is an ultraviolet-ray which has a wavelength in a 1st hardening wavelength area | region, you may irradiate from what kind of light source. That is, the first ultraviolet ray may have a wide wavelength range including not only the wavelength in the first curing wavelength region but also the wavelength in the second curing wavelength region.

  The photopolymerization initiator contained in the first decorating material 3p and the second decorating material 4p is not sensitive to UV light having a wavelength of about 260 nm, such as chlorothioxanthone and isopropylthioxanthone, and is UV light having a wavelength of about 360 nm. It is possible to employ an additive having high sensitivity. The photopolymerization initiator contained in the first decorating material 3p and the second decorating material 4p, for example, has a large molecular extinction coefficient with respect to ultraviolet rays having a wavelength of about 360 nm, as compared with wavelengths in other regions. In addition, a photoinitiator can be suitably selected according to the solubility with respect to a sealing material, ink, etc. The second ultraviolet rays that irradiate the first decorative material 3p and the second decorative material 4p each have a wavelength in the second curing wavelength region and do not have a wavelength in the first curing wavelength region. For example, the light may be emitted from different light sources.

  According to the method for manufacturing a building material according to the embodiment of the present invention, since the curing wavelength regions of the undercoat material 2p and the decorating material (3p, 4p) are different from each other, the undercoating is performed when the decorating material (3p, 4p) is cured. It is possible to prevent the layer 2 from being overexposed. Therefore, according to the building material manufacturing method according to the embodiment of the present invention, the undercoating is caused by the completion of the polymerization reaction on the surface of the undercoating layer 2 during the UV irradiation of the decorative material (3p, 4p). A decrease in adhesion at the interface between the layer 2 and the intermediate coating layer 5 can be prevented.

  Moreover, according to the manufacturing method of the building material which concerns on embodiment of this invention, the 2nd ultraviolet-ray which irradiates decorating material (3p, 4p) substantially has the wavelength in the 1st hardening wavelength area | region of undercoat material 2p. I don't have it. Therefore, it is possible to reduce the progress of the polymerization reaction of the undercoat layer 2 when the decorative material (3p, 4p) is irradiated with UV.

  Moreover, according to the manufacturing method of the building material which concerns on embodiment of this invention, when a 2nd light source consists of UV-LED, the 2nd ultraviolet-ray which has a specific wavelength of a strong spectrum can be irradiated efficiently. . Therefore, the influence with respect to the undercoat layer 2 by a 2nd light source can be reduced.

(Other embodiments)
As described above, the present invention has been described according to the above-described embodiments. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the embodiment already described, the first decorative material 3p and the second decorative material 4p may include different photopolymerization initiators. In this case, the second curing wavelength region is a region in which the curing wavelength regions of the photopolymerization initiators included in the first decorative material 3p and the second decorative material 4p are overlapped.

  In addition, of course, the present invention includes various embodiments that are not described here, such as a configuration in which the above configurations are applied to each other. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

A groove part B flat part 1 base material 2 undercoat layer 2p undercoat material 3 1st decoration layer (decoration layer)
3p 1st decorative material (decorative material)
4 second decorative layer (decorative layer)
4p 2nd decorative material (decorative material)
73 Inkjet device

Claims (5)

A step of forming an undercoat layer from an ultraviolet curable undercoat material having a first curing wavelength region as a wavelength region for initiating photopolymerization, which is applied to the surface of a flat substrate having a groove and a flat part;
Decorated from an ultraviolet curable decorative material having a second curing wavelength region different from the first curing wavelength region as a wavelength region for starting photopolymerization, which is applied to the surface of the undercoat layer in the groove by an inkjet device. And a step of forming a layer. The step of forming the undercoat layer irradiates the undercoat material applied to the substrate with a first ultraviolet ray having a wavelength within the first curing wavelength region,
The step of forming the decorating layer irradiates the decorating material applied to the surface of the undercoat layer in the groove with a second ultraviolet ray having a wavelength within the second curing wavelength region. The manufacturing method of the building material of Claim 1.   The method for manufacturing a building material according to claim 2, wherein the undercoat material is not cured by the second ultraviolet rays.   The method of manufacturing a building material according to claim 2 or 3, wherein the second ultraviolet ray is irradiated from an ultraviolet light emitting diode. A flat substrate having a groove and a flat part;
An undercoat layer formed from an ultraviolet curable undercoat material having a first cured wavelength region as a wavelength region for initiating photopolymerization, applied to the surface of the substrate;
Formed from an ultraviolet curable decorative material having a second curing wavelength region different from the first curing wavelength region as a wavelength region for starting photopolymerization applied to the surface of the undercoat layer in the groove by an inkjet device. A building material comprising a decorative layer.

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