JP2008080654A - Manufacturing method of decorative board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a decorative board where adhesiveness of a transfer layer with respect to a polyester film substrate does not deteriorate even when the temperature of heating transfer is lowered, and high designability can be obtained. <P>SOLUTION: In the manufacturing method of the decorative board, the decorative board is made by heating and transferring a transfer foil 1 to a wooden material on which a polyester film is adhered. The transfer foil is made by laminating the transfer layer 6 including at least a release layer 3, a decorative layer 4 and an adhesive layer 5 on the substrate 2. An average height difference of the surfaces of the polyester film is within 0.02 to 0.05 mm, and the temperature of heating transfer is within 140 to 170°C. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a decorative board by heat-transferring a transfer foil, and in particular, a method for producing a decorative board having a high design property that can transfer a transfer foil to a polyester film substrate at low temperature with good adhesiveness. About.

2. Description of the Related Art Conventionally, it has been widely practiced to manufacture a decorative board by transferring a transfer layer including a decorative layer to a transfer substrate using a transfer sheet (see, for example, Patent Document 1).
When door materials are made of wood-based materials such as MDF boards, polyester films such as PET (polyethylene terephthalate) are affixed to the edges, and R parts are created to improve design There is. When such a door material is decorated with a transfer foil, the transfer foil is transferred to the polyester film portion in addition to the wood-based material portion.
Usually, the temperature at which the transfer foil is heated and transferred is in the range of about 180 to 200 ° C., but in this temperature range, the gloss of the surface of the polyester film affects the decorative layer of the transfer foil, and the design is deteriorated. was there.
In order to solve this, it is conceivable to lower the temperature of the heat transfer, but there is a problem that the adhesiveness to the polyester film is lowered when the temperature of the heat transfer is lowered.

Japanese Patent Publication No. 60-59876

  In view of the above problems, the present invention provides a method for producing a decorative board capable of transferring a transfer foil to a polyester film substrate affixed to a wooden substrate with good adhesiveness and having high design properties. With the goal.

  As a result of intensive studies to achieve the above object, the inventors of the present invention are a method for manufacturing a decorative board, in which a transfer foil is heated and transferred to a woody material to which a polyester film is attached, It was found that by setting the average surface height difference within a certain range, high adhesiveness can be maintained even when the temperature of heat transfer is lowered, and high designability is obtained. The present invention has been completed based on such findings.

That is, the present invention
(1) A method for producing a decorative board obtained by heating and transferring a transfer foil to a woody material to which a polyester film is attached, wherein the transfer foil includes at least a release layer, a decoration layer, and an adhesive layer on a substrate. A method for producing a decorative board, wherein the average surface height difference of the polyester film is in the range of 0.02 to 0.05 mm, and the temperature of the heat transfer is in the range of 140 to 170 ° C.
(2) The method for producing a decorative board according to (1), wherein the transfer surface onto which the transfer foil is transferred is both a polyester film and a wooden substrate,
(3) The decorative board according to (1) or (2), wherein the adhesive layer used for the transfer foil contains a urethane-based resin and a maleic resin, and the content of the maleic resin is 20 to 40% by mass. Manufacturing method,
(4) The method for producing a decorative board according to (3) above, wherein the urethane-based resin contains 0.1 to 5% by mass of an anti-blocking agent, and (5) the softening point of the maleic acid resin is 120 to 185 ° C. The method for producing a decorative board according to (3) or (4) above,
Is to provide.

  ADVANTAGE OF THE INVENTION According to this invention, even if it lowers the temperature of heat transfer, the adhesiveness of the transfer layer with respect to a polyester film base material can be maintained, and also the manufacturing method of the decorative board from which high designability is obtained can be provided. .

  The present invention relates to a method for producing a decorative board obtained by heating and transferring a transfer foil to a woody material to which a polyester film is attached, the transfer foil including at least a release layer, a decoration layer, and an adhesive layer on a substrate. The transfer layer is laminated, and the average surface height difference of the polyester film is in the range of 0.02 to 0.05 mm, and the temperature of the heat transfer is in the range of 140 to 170 ° C.

The present invention is a method for producing a decorative board obtained by heating and transferring a transfer foil to a woody material to which a polyester film is attached.
Examples of the polyester film include polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). The wood-based materials include wood plywood, wood veneer, particle board, medium density fiber board (MDF), high density fiber board ( Woody materials such as HDF).
The production method of the present invention can be used for a material in which a polyester film is pasted on the entire surface of a wood-based material, or for a material in which a part of the wood-based material is processed with a polyester film such as PET. However, it is particularly suitable for materials in which a part of the wood-based material is processed with a polyester film such as PET.

In the production method of the present invention, it is important that the average surface height difference of the polyester film is in the range of 0.02 to 0.05 mm. When the average surface height difference is within this range, sufficient adhesion between the transfer layer and the polyester film can be obtained even by heat transfer at a low temperature, which will be described in detail later. In addition, when transferred at a low temperature, the roughness on the polyester film does not affect the decorative layer in the transfer layer, and irregularities do not appear on the surface of the decorative board. Accordingly, the adhesiveness between the transfer layer and the polyester film is high, and a high design property is obtained. From the above viewpoint, the average surface height difference is preferably in the range of 0.02 to 0.04 mm.
The average surface height difference in the present invention is determined by optically scanning the surface of the polyester film using a three-dimensional measuring microscope (Olympus Optical Industry Co., Ltd. “STM6”). It is detected and measured, and the average value is calculated.

In addition, an easy-adhesive primer for assisting adhesion with the adhesive layer or a sealer agent that seals and seals fine irregularities and porosity on the surface is previously applied to the surface of the transfer object. Also good. The easy adhesion primer or sealer is usually formed by coating a resin such as isocyanate, two-component cured urethane resin, epoxy resin, acrylic resin, or vinyl acetate resin.
The shape of the transfer target is not particularly limited, and can be applied to any shape such as a sheet, a film, a flat plate, a curved plate, a rod-like plate, and a three-dimensional object.

  Next, in the production method of the present invention, it is necessary that the temperature of the heat transfer is in the range of 140 to 170 ° C. The temperature of normal heat transfer is 180 to 200 ° C., and the temperature of heat transfer of the present invention is lower than the conventional temperature. By setting the temperature of heat transfer within this range, when the transfer layer is bonded to the polyester film, the unevenness of the polyester film is absorbed by the adhesive layer and does not reach the decoration layer. And the unevenness | corrugation of a polyester film exhibits an anchor effect with respect to an adhesive bond layer, and improves the adhesiveness of a polyester film and a transfer layer.

About the transfer foil used with the manufacturing method of this invention, the schematic diagram of the cross section of the example is shown in FIG. The transfer foil 1 is usually composed of a substrate 2 and a transfer layer 6 including a release layer 3, a decoration layer 4 and an adhesive layer 5.
In the method for producing a decorative board according to the present invention, when the transfer layer 6 is transferred from the transfer foil 1 to a transfer target, the adhesive constituting the adhesive layer 5 is heated and melted, and the adhesive is cooled and solidified. Then, the transfer layer 6 is bonded to the transfer target (initial bonding), and then the adhesive is melted and cured to obtain a final bonded state.
In addition, the timing which peels the base material 2 is the hardening reaction which the base material 2 cooled to the extent which is not cut | disconnected or plastically deformed by the stress at the time of peeling after cancellation | release of a transfer pressure, and the adhesive layer 5 cooled or partially progressed It may be performed after the time when the transfer foil 1 is solidified and fixed to the transfer target.

As the transfer conditions, the heat transfer temperature is as described above, and the transfer speed is preferably in the range of 1 to 10 m / min. When it is 1 m / min or more, high productivity is obtained, and when it is 10 m / min or less, good transfer processability is obtained. From the above viewpoint, the transfer speed is more preferably in the range of 4 to 6 m / min.
In addition, since the manufacturing method of this invention has a heat transfer temperature lower than the conventional method, the transfer speed can be increased and the productivity is excellent. Further, since the heat transfer temperature is low, there is an advantage that deterioration of the heat transfer roll is suppressed and stable transfer can be performed.

Next, the configuration of the transfer foil 1 used in the present invention will be described in detail with reference to FIG.
The substrate 2 is not particularly limited and may be a conventionally known substrate as long as the substrate 2 has releasability from the transfer layer and the transfer surface has unevenness as long as it has shape followability to the unevenness. Accordingly, when the transfer surface is a flat surface or a two-dimensional uneven surface and the transfer foil is not stretched, a general biaxially stretched polyethylene terephthalate film (sheet) or non-stretchable paper can be used.
When the transfer foil is stretched with a three-dimensional uneven surface, it is important to use a stretchable base material at least during transfer. As the stretchable substrate, for example, a thermoplastic resin can be used, and specifically, polypropylene, polyethylene, polymethylpentene, ethylene-propylene-butene terpolymer, olefin-based thermoplastic elastomer, and the like. Examples thereof include olefin resins; thermoplastic polyester resins such as ethylene terephthalate isophthalate copolymer and polybutylene terephthalate; elastomers such as vinyl chloride resins, polyamide resins, and urethane thermoplastic elastomers.
The substrate 2 may be a single layer of a film or sheet made of the above-described material, or may be used as a laminate made of different materials.
Although it does not specifically limit as thickness of the base material 2, Usually, it is about 20-200 micrometers.

If necessary, the base material 2 may be provided with a release layer on the transfer layer side in order to improve the peelability from the transfer layer (not shown). The release layer is peeled and removed from the transfer layer together with the base material 2 when the base material 2 is peeled off. As the release layer, for example, a simple substance such as an acrylic resin, a silicone resin, a melamine resin, a polyamide resin, a urethane resin, a polyolefin resin, a wax, or a mixture containing these is used.
In order to adjust the peelability, the surface of the substrate 2 on the transfer layer side may be subjected to a surface treatment such as a coating treatment, a corona discharge treatment, or an ozone treatment.

  Moreover, if a concavo-convex pattern is provided on the surface of the substrate 2 on the side in contact with the transfer layer, a concavo-convex pattern such as grain, satin or wood can be formed on the surface of the transfer layer after transfer. The concavo-convex pattern can be formed by a known method such as embossing, sandblasting, and raised printing processing of a shaping layer (which can also serve as a release layer).

The transfer layer 6 shown in FIG. 1 is usually composed of a release layer 3, a decoration layer 4, and an adhesive layer 5.
The release layer 3 is provided for adjusting the peelability between the base material 2 or the release layer provided on the base material 2 and the decorative layer 4, and for protecting the surface of the decorative layer 4 after transfer. Is a layer.
The release layer 3 includes an acrylic resin, a urethane resin, a vinyl chloride-vinyl acetate copolymer, a butyral resin, a cellulose resin, or a mixture of two or more, an electron beam curable resin, and an ultraviolet curable resin. It is preferable to use those obtained by crosslinking and curing. In this case, an acrylic resin is preferable in consideration of wear and transparency.

In order to make surface release appear in the release layer 3 after the transfer, it is preferable to add polyethylene wax, Teflon wax, carnauba wax, paraffin wax or the like as an additive. In addition, when used in exterior applications or parts exposed to sunlight, light stabilizers such as benzotriazole, benzophenone, salicylic acid UV absorbers and hindered amine radical scavengers, phenolic antioxidants and heat It is preferable to add a stabilizer or the like.
The release layer 3 is laminated by a known method such as gravure printing, roll coating, screen printing, or offset printing.

Next, the decorative layer 4 gives decorativeness to the transfer object, and is formed by printing various patterns on the substrate 2 or the release layer 3 using ink and a printing machine. The printing method is not particularly limited, and can be performed by a known method such as gravure printing, offset printing, or screen printing.
As patterns, there are stone patterns imitating the surface of rocks such as wood grain patterns, marble patterns (for example, travertine marble patterns), fabric patterns imitating cloth or cloth patterns, tiled patterns, brickwork patterns, etc. There are also patterns such as marquetry and patchwork that combine these. These patterns are formed by multicolor printing with the usual yellow, red, blue and black process colors, as well as by multicolor printing with special colors prepared by preparing the individual color plates that make up the pattern. Is done.
The printing may be partial printing or solid printing, and both partial printing and solid printing may be performed. Moreover, the uneven | corrugated pattern by embossing etc. to a peeling layer may be sufficient.

As the ink used for the decorative layer 4, an ink in which a binder, a colorant such as a pigment or a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, or a curing agent is appropriately mixed is used. The binder is not particularly limited, and examples thereof include polyurethane resins, vinyl chloride / vinyl acetate copolymer resins, vinyl chloride / vinyl acetate / acrylic copolymer resins, chlorinated polypropylene resins, acrylic resins, and polyesters. Arbitrary resins, polyamide resins, butyral resins, polystyrene resins, nitrocellulose resins, cellulose acetate resins and the like may be used alone or in combination of two or more.
Colorants include carbon black (black), iron black, titanium white, antimony white, yellow lead, titanium yellow, petal, ultramarine, cobalt blue and other inorganic pigments, quinacridone red, isoindolinone yellow, phthalocyanine blue, etc. Metal pigments composed of scaly foils such as organic pigments or dyes, aluminum, brass, pearlescent pigments composed of scaly foils such as titanium dioxide-coated mica and basic lead carbonate, and the like are used.

  Next, the transfer adhesive constituting the adhesive layer 5 preferably contains a urethane resin and a maleic resin. By using such an adhesive, in the production method of the present invention, when the transfer surface onto which the transfer foil is transferred is both a polyester film and a wooden substrate, it can be suitably bonded to both.

As the urethane resin, a two-component curable urethane resin, a one-component curable urethane resin, or the like can be used.
The two-component curable urethane resin is a urethane resin having a polyol as a main component and an isocyanate as a crosslinking agent (curing agent). As the polyol, one having two or more hydroxyl groups in the molecule, for example, polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol, polycarbonate polyol, polyurethane polyol and the like are used. As the isocyanate, a polyvalent isocyanate having two or more isocyanate groups in the molecule is used. For example, aromatic isocyanate such as 2,4-tolylene diisocyanate, xylene diisocyanate, 4,4'-diphenylmethane diisocyanate, or 1,6-hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, etc. Aliphatic (or alicyclic) isocyanates, and adducts or multimers of the above-mentioned various isocyanates can also be used. For example, there are tolylene diisocyanate adducts, tolylene diisocyanate trimers, and the like.

  Alternatively, the isocyanate may be used as a blocked isocyanate, and the reaction may be initiated by releasing the block by heat during transfer. The blocked isocyanate is a compound obtained by temporarily reacting the isocyanate with a blocking agent such as alcohols, phenols, amines and the like to prevent (block) isocyanate group reactivity. Usually, in order to lower the dissociation temperature of the blocking agent to an appropriate temperature range, a known one such as metal soap or amine is used as the dissociation catalyst.

  The one-component curable urethane resin is a composition containing a prepolymer having an isocyanate group at the molecular terminal as an essential component. The prepolymer is usually a polyisocyanate prepolymer having one or more isocyanate groups at both molecular ends, and is in a state of a solid thermoplastic resin at room temperature. Isocyanate groups react with each other by moisture in the air to cause a chain extension reaction. As a result, a reaction product having a urea bond in the molecular chain is generated, and the isocyanate group at the molecular end further reacts with this urea bond. , Biuret bond is caused to branch, causing a crosslinking reaction. The skeleton structure of the molecular chain of the prepolymer having an isocyanate group at the molecular terminal is arbitrary, and specific examples include a polyurethane skeleton having a urethane bond, a polyester skeleton having an ester bond, and a polybutadiene skeleton. One or more of these skeleton structures are employed as appropriate. When a urethane bond is present in the molecular chain, the terminal isocyanate group reacts with this urethane bond to form an allophanate bond, and this allophanate bond also causes a crosslinking reaction.

  The urethane resin used in the present invention is a film having a width of 6 mm and a thickness of 0.7 mm, and the elongation at break is in the range of 500 to 1200% in a tensile test (tensile speed: 45 mm / min) in accordance with JIS K7127. It is preferable. By selecting a urethane resin that has a higher elongation at break than ordinary urethane resins, it becomes easier to design a transfer adhesive that can adhere well to both wood-based materials and polyester film-based materials. .

Moreover, it is preferable to select what has adhesiveness (tackiness) as the urethane-type resin used by this invention. By selecting a material having adhesiveness, it becomes easy to design an adhesive for transfer that can adhere well to both a wood-based material and a polyester film-based material.
However, since this adhesiveness deteriorates the handling of the urethane resin, it is preferable to contain an anti-blocking agent for the purpose of preventing this.

The anti-blocking agent is not particularly limited as long as it is usually used for decorative sheets and the like. For example, highly transparent inorganic particles such as silica, alumina, aluminum hydroxide, barium sulfate, talc, calcium carbonate, etc. Are preferably used.
The particle size of the antiblocking agent is usually preferably about 0.1 to 5 μm, more preferably 0.5 to 3 μm from the viewpoint of effects.
As content of an antiblocking agent, it is preferable to contain in 0.1-5 mass% in urethane type resin. Adhesiveness can fully be suppressed as it is 0.1 mass% or more, and suitable handling property is obtained. On the other hand, blocking can be suppressed as it is 5 mass% or less.

Next, the maleic resin contained in the transfer adhesive constituting the adhesive layer 5 is a copolymer obtained by copolymerizing maleic anhydride or maleic ester with other monomers. As the monomer copolymerized with maleic anhydride, any monomer may be used as long as it is a copolymerizable monomer, and various monomers may be used in combination.
Particularly useful monomers include styrene, isobutylene, (meth) acrylic acid alkyl ester, benzyl (meth) acrylate and the like.
The proportion of maleic anhydride and the monomer copolymerized therewith is preferably in the range of 1 to 5 mol, more preferably in the range of 1 to 3 mol, with respect to 1 mol of maleic anhydride. Maleic anhydride and the monomer to be copolymerized with it are dissolved in an organic solvent that does not inhibit the polymerization such as acetate ester, dioxane, xylene, and radical generators such as azobisisobutyronitrile, benzoyl peroxide, lauroyl peroxide, etc. Is added in the range of usually 0.1 to 5 parts by weight, preferably 0.5 to 2 parts by weight, with respect to a total of 100 parts by weight of maleic anhydride and monomers copolymerized therewith, and 70 to 150 ° C. A copolymer is obtained by reacting for 2 to 10 hours in the above temperature range.
The average molecular weight of the maleic resin is preferably in the range of 2000 to 50000, more preferably 5000 to 30000.

  The maleic resin in the present invention includes rosin-modified maleic resin. The rosin-modified maleic resin is obtained by making an adduct of a tribasic acid from rosin and maleic anhydride and esterifying with a polyhydric alcohol. Different properties such as softening point and solubility can be obtained depending on the amount of maleic anhydride added, the type of polyhydric alcohol, and the degree of esterification.

  The softening point of the maleic resin is preferably 120 to 185 ° C. When the softening point is 120 ° C. or higher, transferability at low temperature is improved, and when the softening point is 185 ° C. or lower, blocking can be suppressed. From the above viewpoint, the softening point is preferably in the range of 120 to 150 ° C. The acid value is preferably in the range of 100 to 300, more preferably in the range of 150 to 300.

  The content of maleic resin in the transfer adhesive is preferably in the range of 20 to 40% by mass in terms of solid content. When the content of the maleic resin is within this range, it can be satisfactorily adhered to both the woody material and the polyester film material. From the above points, the maleic resin content is preferably in the range of 25 to 35% by mass.

  Various additives can be blended in the transfer adhesive. Examples of the additive include an abrasion resistance improver, an infrared absorber, an antistatic agent, a leveling agent, a thixotropic agent, a filler, a solvent, a colorant, a weather resistance improver, and an antibacterial agent.

Examples of the wear resistance improver include fine particles of inorganic materials such as α-alumina, silica, kaolinite, iron oxide, diamond, and silicon carbide. Examples of the shape of the fine particles include a sphere, an ellipsoid, a polyhedron, a scale shape, and the like. Although there is no particular limitation, a spherical shape is preferable. Organic materials include synthetic resin beads such as cross-linked acrylic resin and polycarbonate resin. The particle size is usually about 30 to 200% of the film thickness. Among these, spherical α-alumina is particularly preferable because it has high hardness and a large effect on improving wear resistance, and it is relatively easy to obtain spherical fine particles.
As the infrared absorber, for example, a dithiol metal complex, a phthalocyanine compound, a diimmonium compound, or the like is used.
As the filler, for example, barium sulfate, talc, clay, calcium carbonate, aluminum hydroxide and the like are used.
Examples of the colorant include known coloring pigments such as quinacridone red, isoindolinone yellow, phthalocyanine blue, phthalocyanine green, titanium oxide, and carbon black.

The adhesive layer 5 is formed by applying the adhesive described in detail above. The thickness of the adhesive layer is not particularly limited as long as adhesiveness to the transfer target is obtained, but is usually in the range of 1 to 50 μm. In particular, considering the simultaneous bonding to the wood material and the polyester material, the thickness of the adhesive layer 5 is preferably in the range of 5 to 30 μm, and more preferably in the range of 10 to 20 μm.
There is no restriction | limiting in particular about the coating method of the adhesive bond layer 5, Usually, methods, such as gravure printing, a spray coat, a flow coat, can be used.

  The decorative plate obtained by the present invention can be used as a door material, bathroom wall material, unit bath wall material, unit bath interior material, kitchen wall material, AV equipment, air conditioner cover, etc. Also suitable for door materials such as wood plywood, wood veneer, particle board, medium density fiberboard (MDF), high density fiberboard (HDF), etc., processed with a polyester film such as PET. It is.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.
(Evaluation methods)
About the decorative board obtained by each Example and the comparative example, the adhesiveness and design property of a transfer layer and a to-be-transferred body were evaluated as follows. In addition, the average surface height difference of the polyester film in each Example and a comparative example was measured by the method as described in the specification text.
(1) Adhesiveness The peeled state between the transfer layer and the transfer target was visually evaluated. The evaluation criteria are as follows.
3 points; 2 points of good adhesion; 1 point of slight peeling; poor adhesion (2) design properties The surface smoothness of the transfer layer after being thermally transferred to the transfer medium was visually evaluated. The evaluation criteria are as follows.
○: Unevenness is not seen on the surface, the surface is smooth, and the design is high.
Δ: The surface has slight irregularities, but has a design property that is not problematic for practical use.
X: The unevenness | corrugation of a polyester film appears in a decoration layer and design nature is low.

Production Example 1 (Production of transfer foil)
As the base material 2, PET (“E-130” manufactured by Mitsubishi Polyester Film Co., Ltd.) is used, an acrylic resin is used as a binder on one side, and a resin composition containing polyester as an additive is applied to the release layer 3. Was provided. The thickness of the release layer 3 was 2 μm.
Next, a woodgrain pattern decoration layer 4 was formed on the release layer 3 by gravure printing using a colorant mainly composed of acrylocyanine, phthalocyanine, isoindolinone, and quinacridone. The thickness of the decorative layer 4 was 2 μm.
Next, a mixture of urethane resin and maleic resin having a breaking elongation (measurement conditions described in the text of the specification) of 1000% when made into a film (urethane resin / maleic resin, Showa Ink Industries, Ltd.) And a maleic acid resin having a softening point of 130 ° C. (manufactured by Showa Ink Industries, Ltd.) were mixed so that the content of the maleic resin in the mixed resin was 33.3 mass%. The mixed resin was gravure coated on the decorative layer 4 to form an adhesive layer 5 so that the thickness after drying was 15 μm.

Example 1
A material in which a polyester film (“R81 (PET-G), manufactured by Riken Technos Co., Ltd., thickness: 500 μm)” is attached as an edge tape around an MDF substrate (“Techno Wood” manufactured by Daiken Kogyo Co., Ltd., thickness 2 mm) Prepared. The average surface height difference of the polyester film was 0.0321 mm.
The transfer foil prepared in Production Example 1 was transferred to this material under the conditions of a transfer temperature of 160 ° C. and a transfer speed of 7 m / min to manufacture a decorative board. The results evaluated by the above method are shown in Table 1.

Example 2
A decorative board is produced in the same manner as in Example 1 except that a polyester film having an average surface height difference of 0.02 mm ("R107 (PET-G)" manufactured by Riken Technos Co., Ltd., thickness: 500 μm) is used. did. The results evaluated in the same manner as in Example 1 are shown in Table 1.

Comparative Example 1
A decorative board is produced in the same manner as in Example 1 except that a polyester film having an average surface height difference of 0.0135 mm (“R45 (PET-G)” manufactured by Riken Technos Co., Ltd., thickness: 500 μm) is used. did. The results evaluated in the same manner as in Example 1 are shown in Table 1.

Comparative Example 2
A decorative board is produced in the same manner as in Example 1 except that a polyester film having an average surface height difference of 0.0111 mm (“PT201 (PET-G)” manufactured by Riken Technos Co., Ltd., thickness: 500 μm) is used. did. The results evaluated in the same manner as in Example 1 are shown in Table 1.

Comparative Example 3
A decorative board is manufactured in the same manner as in Example 1 except that a polyester film having an average surface height difference of 0.0037 mm (“PT904 (PET-G)” manufactured by Riken Technos Co., Ltd., thickness: 500 μm) is used. did. The results evaluated in the same manner as in Example 1 are shown in Table 1.

Comparative Example 4
A decorative board is produced in the same manner as in Example 1 except that a polyester film having an average surface height difference of 0.0036 mm (“Rivester (PET-G)” manufactured by Riken Technos Co., Ltd., thickness: 500 μm) is used. did. The results evaluated in the same manner as in Example 1 are shown in Table 1.

Comparative Examples 5-10
In Examples 1 and 2 and Comparative Examples 1 to 4, decorative plates were produced in the same manner as in the Examples and Comparative Examples except that the temperature of heat transfer was 180 ° C. The results evaluated in the same manner as in Example 1 are shown in Table 1.

According to the production method of the present invention, even if the temperature of heat transfer is lowered, the adhesion of the transfer layer to the polyester film substrate does not deteriorate, and a decorative board having high design properties can be obtained. Moreover, according to the manufacturing method of this invention, it can be made to adhere | attach favorable to both a wood type material and a polyester film type material. Therefore, it is suitable for door materials such as wood plywood, wood veneer, particle board, medium density fiberboard (MDF), high density fiberboard (HDF), etc., which are processed with polyester film such as PET. And can be transferred with high adhesiveness to both woody materials and polyester films.
In addition, since the heat transfer temperature is low, deterioration of the thermal transfer roll can be suppressed, stable transfer can be performed, transfer speed can be increased, and productivity is dramatically improved.

It is a schematic diagram which shows the cross section of an example of the transfer foil used by this invention.

Explanation of symbols

1. Transfer foil Base material 3. Release layer 4. Decorative layer 5. Adhesive layer 6. Transfer layer

Claims (5)

  A method for producing a decorative board obtained by heating and transferring a transfer foil to a woody material to which a polyester film is attached, wherein the transfer foil is laminated on a substrate with a transfer layer including at least a release layer, a decoration layer and an adhesive layer A method for producing a decorative board, wherein the polyester film has an average surface height difference of 0.02 to 0.05 mm and a heat transfer temperature of 140 to 170 ° C.   The method for producing a decorative board according to claim 1, wherein the transfer surface onto which the transfer foil is transferred is both a polyester film and a wooden substrate.   The method for producing a decorative board according to claim 1 or 2, wherein the adhesive layer used for the transfer foil contains a urethane resin and a maleic resin, and the content of the maleic resin is 20 to 40% by mass. The method for producing a decorative board according to claim 3, wherein the urethane-based resin contains 0.1 to 5% by mass of an anti-blocking agent. The method for producing a decorative board according to claim 3 or 4, wherein the maleic acid resin has a softening point of 120 to 185 ° C.

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