JP2017148990A - Decorative paper and decorative sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide decorative paper excellent in designability.SOLUTION: Decorative paper 1 includes: printing base paper 2; an anchor layer 3 which is formed on the whole surface of the printing base paper 2 and contains a polyester-based resin; a printing layer 4 which is formed partially on the anchor layer 3 and is formed from ultraviolet curable inkjet ink; and a clear layer 5 which is formed on a portion on the anchor layer 3 where the printing layer 4 is not formed and on the printing layer 4 and contains an ionizing radiation curable resin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a decorative paper and a decorative board.

  Conventionally, as a decorative sheet, there exists a technique of patent document 1, for example. In the technique described in Patent Document 1, a printing layer is partially formed on a printing original fabric by using ink jet printing excellent in the production of small lots and various varieties. In the technique described in Patent Document 1, water-based pigment ink and solvent-based pigment ink are used as inkjet ink.

Japanese Patent Laid-Open No. 2001-71447

However, in the technique described in Patent Document 1, for example, when a decorative paper is configured using paper (printing base paper) as a printing raw material and using ultraviolet curable ink jet ink as the ink jet ink, the ultraviolet curable ink jet is used. The air that the paper is embracing with ink cannot be replaced sufficiently. Therefore, for example, when a clear layer containing an ionizing radiation curable tree is provided on the printing base paper and the printing layer, the air embraced by the printing raw material enters the clear layer, and bubbles are formed in the clear layer. It may be trapped and may cause poor appearance on the decorative paper.
This invention pays attention to the above points, and it aims at providing the decorative paper excellent in the designability, and a decorative board.

  In order to solve the above problems, one embodiment of the present invention includes a printing base paper, an anchor layer containing a polyester-based resin formed on the printing base paper, and an ultraviolet curable inkjet partially formed on the anchor layer. It is characterized by comprising a printing layer made of ink, and a clear layer containing an ionizing radiation resin formed on the anchor layer and the printing layer.

  According to one aspect of the present invention, since the anchor layer containing the polyester resin is provided on the printing base paper, the air contained in the printing base paper is sufficiently replaced with the polyester resin, and printing is performed with the anchor layer. The base paper can be coated. Therefore, it is possible to prevent the air held by the printing base paper from entering the clear layer and to prevent air bubbles from being trapped in the clear layer. Thereby, the decorative paper which was excellent in the designability can be provided.

It is an end view showing composition of decorative paper and a decorative board.

Next, embodiments of the present invention will be described with reference to the drawings.
Here, the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Further, the embodiment described below exemplifies a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention is that the material, shape, structure, etc. of the component parts are as follows. It is not something specific. The technical idea of the present invention can be variously modified within the technical scope defined by the claims described in the claims.

(Decorative board 6)
As shown in FIG. 1, the decorative paper 1 of the present embodiment is formed by laminating an anchor layer 3, a printing layer 4, and a clear layer 5 in this order on one surface of a printing base paper 2. Then, the base plate 9 is bonded to the other surface of the printing base paper 2 via the primer layer 7 and the adhesive layer 8 to form the decorative board 6. The decorative board 6 of this embodiment is particularly suitable for uses such as kitchen doors.
(Printing base paper 2)
The printing base paper 2 is a layer made of paper. The basis weight of the paper is preferably 40 g / m ² or more, for example.

(Anchor layer 3)
The anchor layer 3 is formed on the entire surface of the printing base paper 2 and is a layer for fixing the inkjet ink. Thereby, the printing base paper can be covered with the anchor layer 3. The anchor layer 3 is obtained by coating a resin (coating liquid) for the anchor layer 3 on the surface of the printing base paper 2. The coating apparatus is not particularly limited, and a known coating apparatus can be used. For example, a gravure coater, a bar coater, or a blade coater can be used. As the coating liquid, for example, a polyester resin can be used in consideration of the permeability to the printing base paper 2 and the adhesion to the ultraviolet curable inkjet ink or ionizing radiation curable resin. As a result, the air embraced by the printing base paper 2 can be sufficiently replaced with the polyester-based resin, the adhesion between the anchor layer 3 and the printing layer 4, and the adhesion between the anchor layer 3 and the clear layer 5. Can be improved.

  As the polyester-based resin, for example, if considering the permeability to the printing base paper 2 and the adhesion to the ultraviolet curable inkjet ink or ionizing radiation curable resin, the curing agent is 3 parts by mass or more with respect to 100 parts by mass of the main agent. What is contained is preferable. In this case, as the main agent, a light yellow liquid to which polycondensation of unsaturated dibasic acids such as glycol, maleic anhydride, fumaric acid and the like, and further adding a styrene monomer that functions as a diluent and a crosslinking agent is used. As the curing agent, benzoyl peroxide or methyl ethyl ketone peroxide is used. Moreover, you may add additives, such as surfactant, an antifoamer, a thickener, and a water resistance agent, to the anchor layer 3 as needed.

(Print layer 4)
The printed layer 4 is a layer that is partially formed on the anchor layer 3 and on which a pattern for imparting design properties is formed. The print layer 4 is obtained by printing a pattern on the surface of the anchor layer 3. As the printing apparatus, for example, an ink jet printing apparatus that ejects ink droplets and sprays ink can be used. As the ink, for example, an ultraviolet curable inkjet ink can be used in consideration of productivity. Moreover, as a pattern, the pattern suitable for the location where the decorative paper 1 (decorative board 6) is used, such as a wood grain, a cork, a ceramics, and an abstract pattern, can be selected, for example.

(Clear layer 5)
The clear layer 5 is a layer made of a resin that is formed on the anchor layer 3 where the printed layer 4 is not formed and on the printed layer 4 and is transparent or translucent to such an extent that the pattern of the printed layer 4 can be seen through. . The clear layer 5 is obtained by applying a resin (coating liquid) for the clear layer 5 on the above portion and the printed layer 4. The coating apparatus is not particularly limited, and a known coating apparatus can be used. For example, a gravure coater, a bar coater, or a blade coater can be used. As the coating liquid, for example, ionizing radiation curable resins can be used in consideration of improvement in surface properties such as abrasion resistance, scratch resistance, and solvent resistance. As the ionizing radiation curable resin, for example, an ultraviolet curable resin can be used. Examples of the ultraviolet curable resin include (meth) acrylic resins, silicone resins, polyester resins, urethane resins, amide resins, and epoxy resins. The ionizing radiation curable resin is crosslinked (cured) by being irradiated with ionizing radiation after coating.

(Primer layer 7)
The primer layer 7 is formed on the other surface of the printing base paper 2 and is a layer made of a primer. The primer is not particularly limited, and a known primer can be used. For example, a mixture of a polyester urethane resin and a vinyl chloride-vinyl acetate copolymer can be used.
(Adhesive layer 8)
The adhesive layer 8 is a layer formed on the primer layer 7 and made of an adhesive. As the adhesive, for example, a urea-based adhesive, a vinyl acetate adhesive, or a PUR adhesive can be used.
(Substrate 9)
The base material 9 is a plate-shaped member made of a metal or wood. As the metal system, for example, aluminum, steel, stainless steel, or a composite panel can be used. As a composite panel, for example, there is a panel provided with a sheet-like resin layer serving as a core and metal plates (aluminum, galvalume, stainless steel, etc.) attached to both surfaces of the resin layer. Moreover, as a wood system, MDF (medium density fiberboard), a plywood, and a particle board can be used, for example.

(Production method)
Next, the manufacturing method of the decorative board 6 is demonstrated.
First, the anchor layer 3 is formed by applying a coating liquid for the anchor layer 3, that is, a polyester resin, to the whole surface of one surface of the printing base paper 2, and drying the applied polyester resin. As a result, the polyester base resin is infiltrated into the printing base paper 2, and the air held in the printing base paper 2 is sufficiently replaced with the polyester base resin, and the printing base paper 2 is covered with the polyester base resin. Subsequently, the printing layer 4 is partially formed on the anchor layer 3. Specifically, a pattern is printed with ultraviolet curable inkjet ink using an inkjet printing apparatus.

Subsequently, a coating liquid for the clear layer 5, that is, an ionizing radiation curable resin is applied to a portion of the anchor layer 3 where the printed layer 4 is not formed and the printed layer 4, and the ionized radiation is applied. The clear layer 5 is formed by irradiating the radiation curable resin with ionizing radiation to crosslink and cure the coating liquid.
Thereby, it is possible to prevent the air held by the printing base paper 2 from entering the clear layer 5 and to prevent air bubbles from being trapped in the clear layer 5. Moreover, since the polyester resin was used, the adhesiveness of the anchor layer 3 and the printing layer 4 and the anchor layer 3 and the clear layer 5 can be improved.
Subsequently, the primer layer 7 is formed by applying the coating solution for the primer layer 7 to the other surface of the printing base paper 2 and drying the applied coating solution. Subsequently, the substrate 9 is bonded through the primer layer 7 and the adhesive layer 8. Thereby, the decorative board 6 is formed (manufactured).

(Effect of this embodiment)
The invention according to this embodiment has the following effects.
(1) The decorative paper 1 according to the present embodiment is partially formed on the printing base paper 2, the anchor layer 3 containing the polyester resin formed on the entire surface of the printing base paper 2, and the anchor layer 3. A printing layer 4 made of ultraviolet curable ink-jet ink, and a clear layer 5 containing an ionizing radiation curable resin formed on the printing layer 4 and a portion of the anchor layer 3 where the printing layer 4 is not formed. .
According to such a configuration, since the anchor layer 3 containing the polyester resin is provided on the printing base paper 2, the air that the printing base paper 2 is embracing is sufficiently replaced with the polyester resin, and the anchor layer 3 The printing base paper 2 can be coated. Therefore, it is possible to prevent the air held by the printing base paper 2 from entering the clear layer 5 and prevent air bubbles from being trapped in the clear layer 5. Thereby, the decorative paper 1 more excellent in design can be provided.

(2) In the decorative paper 1 according to the present embodiment, the polyester resin contains 3 parts by mass or more of the curing agent with respect to 100 parts by mass of the main agent.
According to such a configuration, it is possible to improve the permeability to the printing base paper 2 and the adhesion with the ultraviolet curable inkjet ink or ionizing radiation curable resin.
(3) The decorative board 6 according to the present embodiment is obtained by applying the decorative paper 1 described in the above (1) and (2) to the base material 9 via any one of a urea adhesive, a vinyl acetate adhesive, and a PUR adhesive. It is pasted together.
According to such a structure, the decorative board 6 excellent in the designability can be provided.

Embodiments according to the present invention will be described.
(Example)
In Example 1, the coating liquid for the anchor layer 3 was applied to the entire surface of one side of the printing base paper 2 by gravure printing. As a coating liquid for the anchor layer 3, a polyester resin (main agent DIC: G43-NT, hardener DIC: W-325) containing 10 parts by mass of a curing agent with respect to 100 parts by mass of the main agent was used. The basis weight of the printing base paper 2 was 60.5 g / m ² . The coating amount was 4.2 g / m ² . Subsequently, the applied coating solution was dried to form the anchor layer 3.

  Subsequently, a print layer 4 was partially formed on the anchor layer 3 by printing a pattern by ink jet printing. As the inkjet ink, an ultraviolet curable inkjet ink (manufactured by Dainippon Screen: TruePressJET W3200UV) was used. Subsequently, a coating liquid for the clear layer 5 (ionizing radiation curable resin. Sanbin Paint rabin: RF-00-197) is formed on the portion of the anchor layer 3 where the printed layer 4 is not formed and on the printed layer 4. ) Was applied with a float coat. Subsequently, the coating solution (ionizing radiation curable resin) was irradiated with ionizing radiation to crosslink and cure the coating solution to form the clear layer 5. The thickness was 80 μm.

Subsequently, a coating solution for the primer layer 7 was applied to the other surface of the printing base paper 2. As a coating solution for the primer layer 7, a mixture of a polyester urethane resin containing 3 parts by mass of a curing agent with respect to 100 parts by mass of the main agent and a vinyl chloride-vinyl acetate copolymer was used. The coating amount of the coating solution was 1.2 g / m ² . Further, 1.5% by mass of silica having a particle diameter of 2 μm was added. Subsequently, the coated coating solution was dried to form a primer layer 7 on the other surface of the printing base paper 2.
Subsequently, the base material 9 was bonded to the other surface of the printing base paper 2 through the primer layer 7 and the adhesive layer 8. As the substrate 9, MDF having a thickness of 15 mm was used. Further, a PUR adhesive was used as an adhesive constituting the adhesive layer 8. The amount of adhesive applied was 40 g / m ² .

(Comparative example)
In the comparative example, an acrylic polyol containing 10 parts by mass of the curing agent with respect to 100 parts by mass of the main agent (main agent DIC: RF-00-197) was used as the coating liquid for the anchor layer 3. Otherwise, the configuration was the same as in Example 1.
(Evaluation judgment)
The following evaluation was implemented about the decorative paper 1 of the above Example and the comparative example.
(Creativity)
The clear layer 5 was observed for bubbles. At that time, the case where there was no bubble having a diameter of 0.1 μm or more in the clear layer 5 was determined to be acceptable “◯”, and the case where there was one or more bubbles was regarded as unacceptable “x”.

(Ink / anchor layer adhesion)
Based on JIS K5400, it evaluated by the 1 mm base | substrate peel test. At that time, the case where the peeling of the base mesh was 0 at the interface between the anchor layer 3 and the printing layer 4 was judged as “good”, and the case where the peeling of the base mesh was 1 or more was judged as “fail”.
(Ink / clear layer adhesion)
Based on JIS K5400, it evaluated by the 1 mm base | substrate peel test. At that time, the case where the peeling of the substrate at the interface between the printing layer 4 and the clear layer 5 was 0 was judged as “good”, and the case where the peeling of the substrate was 1 or more was judged as “failed”.
(Anchor layer clear layer adhesion)
Based on JIS K5400, it evaluated by the 1 mm base | substrate peel test. At that time, the case where the peeling of the base mesh was 0 at the interface between the anchor layer 3 and the clear layer 5 was determined to be a pass “◯”, and the case where the peeling of the base mesh was 1 or more was determined to be a rejection “X”.
The evaluation results are shown in Table 1.

From Table 1, it was found that the decorative paper 1 in which the anchor layer 3 containing the polyester resin was provided on the entire surface of the example, that is, the printing base paper 2, was excellent in design and adhesion. Therefore, according to this invention, it turned out that the suitable decorative paper 1 can be provided. In addition to the decorative paper 1 described in the above examples, various decorative papers 1 having the materials and numerical values described in the above embodiments should be confirmed to have excellent appearance and adhesion. I was able to.
In contrast, in the comparative example, that is, the decorative paper 1 in which the anchor layer 3 containing acrylic polyol is provided on the entire surface of the printing base paper 2, the design property is acceptable, but the anchor layer 3 and the printing layer 4 and the adhesion between the anchor layer 3 and the clear layer 5 failed “x”.

DESCRIPTION OF SYMBOLS 1 Decorative paper 2 Printing base paper 3 Anchor layer 4 Printing layer 5 Clear layer 6 Decorative plate 7 Primer layer 8 Adhesive layer 9 Base material

Claims (3)

  A printing base paper, an anchor layer containing a polyester resin formed on the entire surface of the printing base paper, a printing layer made of ultraviolet curable inkjet ink partially formed on the anchor layer, and the anchor layer A decorative paper comprising a clear layer containing an ionizing radiation curable resin formed on a portion where the printed layer is not formed and on the printed layer.   The decorative paper according to claim 1, wherein the polyester resin contains 3 parts by mass or more of a curing agent with respect to 100 parts by mass of the main agent.   A decorative board comprising the decorative paper according to claim 1 or 2 attached to a base material through an adhesive composed of any of urea, vinyl acetate and PUR.

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