JP2006341418A - Ink image receiving layer transfer sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink image receiving layer transfer sheet used for manufacturing a decorative laminate which has excellent designability, water resistance and durability and can allow an image to be formed by an oily pigment-series inkjet process. <P>SOLUTION: This ink image receiving layer transfer sheet 1 used for the manufacture of the decorative laminate, is formed of at least an ink image receiving layer 3 and a heat-adhesive layer 4 laminated, in that order, on a base material sheet 2. The manufacturing method for this sheet 1 comprises a process to superpose the sheet 1 over a decorative substrate on a base material sheet 2 and heat-transfer the ink image receiving layer 3 to the decorative substrate by heat-pressurizing and a process to form an image on the ink image receiving layer 3 formed on the decorative substrate by discharging an oily pigment-series ink by an inkjet printer according to image information. In this case, the ink image receiving layer 3 contains a thermoplastic resin. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an ink image-receiving layer transfer sheet used in the production of a decorative plate comprising a step of forming an image by ejecting oil-based pigment-based ink according to image information to an ink image-receiving layer formed on a decorative substrate.

As a method for producing a decorative board having excellent design properties, a method for printing directly on a decorative substrate has been conventionally known. As these printing methods, known printing techniques such as normal gravure printing, offset printing, silk screen printing, and ink jet printing can be used. In particular, ink jet printing is simple in output method, print quality, and printing in small lots. Is characterized by low cost.

However, when ink-jet printing is performed directly on a decorative substrate, ink bleeding occurs. Therefore, an adhesive layer is provided on the back side of a special sheet having ink receptivity, and is then attached to the decorative substrate before printing. It is. In that case, problems such as the adhesive sticking out of the decorative board and soiling the decorative board occurred. Also, there is a method of forming an ink receiving layer on the decorative substrate by spraying or the like, but it takes time to dry and the practicality is poor. On the other hand, Patent Document 1 discloses a method capable of transferring and forming an ink image-receiving layer. However, since the ink image-receiving layer mainly uses a hydrophilic resin, the product obtained has poor water resistance.

JP-A-9-174762

Accordingly, an object of the present invention is to provide an ink image-receiving layer transfer sheet used in the production of a decorative board excellent in design, water resistance and durability for forming an image by an oil-based pigment ink-jet method.

In order to solve the above-mentioned problems, the present invention provides an ink image-receiving layer transfer sheet having at least an ink image-receiving layer and a thermal adhesive layer sequentially provided on a base material sheet, and a decorative substrate, and is heated and pressurized to apply the ink image-receiving layer. A method for producing a decorative board, comprising: a step of thermally transferring a layer to a decorative substrate; and a step of discharging an oil-based pigment-based ink according to image information to an ink image receiving layer formed on the decorative substrate to form an image. In the ink image-receiving layer transfer sheet to be used, an ink image-receiving layer transfer sheet characterized in that the ink image-receiving layer contains a thermoplastic resin.
Furthermore, the present invention provides an ink image-receiving layer transfer sheet, wherein the thermoplastic resin is a chlorine-containing resin.
Further, the present invention provides an ink image-receiving layer transfer sheet, wherein the chlorine-containing resin is at least one selected from vinyl chloride resin, vinyl chloride vinyl acetate copolymer resin, chlorinated polyolefin resin and derivatives thereof. .

If the ink image-receiving layer transfer sheet of the present invention is used, a decorative board excellent in design, water resistance and durability can be obtained.

Embodiments of the present invention will be described below.
FIG. 1 is a cross-sectional view showing the form of an ink image-receiving layer transfer sheet used in the present invention, and a peelable ink image-receiving layer and a thermal adhesive layer are sequentially provided on one surface of a substrate sheet.

Various resin sheets can be used for the base sheet, such as polyethylene, polypropylene, polybutene, ethylene propylene copolymer, ethylene-vinyl acetate copolymer, polyethylene terephthalate, acrylic, vinyl chloride, polycarbonate, polyamide, etc. It is. Particularly preferred is a resin sheet comprising polyethylene terephthalate as a main component, and an additive may be contained for the purpose of improving sheet physical properties. Further, the thickness of the substrate sheet is preferably 20 μm to 200 μm from the viewpoint of workability, but is not limited thereto. The base sheet may be appropriately subjected to known easy adhesion treatment or antistatic treatment as necessary.

The ink image-receiving layer contains a thermoplastic resin, and is characterized by vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, chlorinated polyolefin resin, urethane resin, polyester resin, ethylene-vinyl acetate copolymer resin. Vinyl acetate resin, acrylic resin and derivatives thereof can be used. By including the thermoplastic resin, the recording suitability of the oil-based pigment-based inkjet ink is improved. Furthermore, after the image is formed, the protective film can be adhered by heating and pressurizing for the purpose of protecting the surface of the ink image receiving layer. Among the thermoplastic resins, the use of a chlorine-containing resin is preferable because the recording suitability of the oil-based pigment-based inkjet ink is further improved. Examples of chlorine-containing resins include vinyl chloride resins and copolymers thereof, vinylidene chloride resins and copolymers thereof, chloroprene-based synthetic rubbers, epichlorohydrin rubbers and copolymers thereof,

A chlorinated polyolefin resin, a chlorinated rubber, etc. are mentioned.
Among these, it is more preferable to contain a vinyl chloride resin, a vinyl chloride vinyl acetate copolymer resin, a chlorinated polyolefin resin, and derivatives thereof.

In addition to the above components, it is possible to add fine particles, an ultraviolet ray inhibitor, an antistatic agent, a lubricant and the like to the ink image receiving layer. Examples of additives that can be added include silica, alumina, calcium carbonate, magnesium carbonate, aluminum hydroxide, magnesium hydroxide, zinc oxide, magnesium oxide, aluminum silicate, calcium silicate, zeolite, mica, carbon black, titanium white, and zinc white. , Petal, bitumen, cadmium red, azo pigment, lake pigment, anthraquinone pigment, phthalocyanine pigment, quinacridone pigment, isoindolinone pigment, imidazolone pigment, dioxazine pigment, gold powder, silver powder, copper powder, aluminum powder, fish scale powder, pearl pigment , Fluorescent pigments, luminescent pigments, or a mixture of two or more selected from these pigments can be used. The thickness of the image receiving layer is not particularly limited, but is preferably 2 μm or more from the appropriate recording property of the oil-based pigment-based inkjet ink.

The thermal adhesive layer has adhesiveness to the decorative substrate by heating and pressing, and is characterized by acrylic resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, urethane resin, polyester resin, epoxy resin , Ethylene-vinyl acetate copolymer resin, polyamide resin, chlorinated polyolefin and the like.

In addition to the above components, it is possible to add fine particles, an ultraviolet light inhibitor, an antistatic agent, a lubricant and the like to the thermal adhesive layer. Examples of additives that can be added include silica, alumina, calcium carbonate, magnesium carbonate, aluminum hydroxide, magnesium hydroxide, zinc oxide, magnesium oxide, aluminum silicate, calcium silicate, zeolite, mica, carbon black, titanium white, and zinc white. , Petal, bitumen, cadmium red, azo pigment, lake pigment, anthraquinone pigment, phthalocyanine pigment, quinacridone pigment, isoindolinone pigment, imidazolone pigment, dioxazine pigment, gold powder, silver powder, copper powder, aluminum powder, fish scale powder, pearl pigment , Fluorescent pigments, luminescent pigments, or a mixture of two or more selected from these pigments can be used.

As the decorative substrate used in the present invention, a plastic substrate, a metal substrate and a glass substrate which are usually used can be used, and the thickness of the plate can be about 1 mm to 50 mm, but is not particularly limited.

The thermal adhesive layer preferably contains a material lower than the softening point of the decorative substrate. In particular, when a plastic substrate is used as the decorative substrate, the adhesive layer preferably contains a material lower than the softening point of the plastic substrate. By containing a material lower than the softening point of the decorative substrate, the heating temperature does not need to be excessively higher than the softening point of the plastic substrate in the step of heating and pressurizing to thermally transfer the ink image receiving layer to the decorative substrate. As a result, it is possible to prevent the decorative plate from being warped in the process of transferring the image receiving layer by heating and pressing.

Examples of the plastic substrate material include acrylic resin, polycarbonate resin, ABS resin, polyester resin, polypropylene resin, and vinyl chloride resin. Materials that are lower than the softening point of the decorative substrate include urethane resin, acrylic resin, epoxy resin, polyamide resin, polyester resin, ketone resin, chlorinated polyolefin resin, maleic acid-modified olefin resin, ethylene-vinyl acetate copolymer resin, etc. Is possible.

Although it does not specifically limit as thickness of a heat bonding layer, In order to ensure the adhesiveness with a decorative substrate and an oil-based pigment-type inkjet ink, it is preferable to set it as 1 micrometer or more, Furthermore, it is more preferable to set it as 3 micrometers or more. In consideration of productivity, the thickness is preferably 100 μm or less.

Next, the manufacturing method of the decorative board of this invention is demonstrated. An ink image-receiving layer transfer sheet and a decorative substrate on which at least an ink image-receiving layer and a thermal adhesive layer are detachably provided are superposed on a base sheet, and heated and pressed. Although heating temperature is not specifically limited, 60 degreeC or more is preferable. In the case of 60 ° C. or lower, the ink image-receiving layer transfer sheet and the decorative substrate may not be sufficiently bonded. Moreover, it is preferable to set it as 180 degrees C or less. When the temperature is 180 ° C. or higher, the ink image-receiving layer transfer sheet may be damaged by heat shrinkage. Moreover, when a plastic substrate is used for the decorative substrate, the plastic substrate may be deformed, which is not preferable. Next, the base sheet is peeled off from the ink image-receiving layer transfer sheet adhered to the decorative substrate, the image-receiving layer is transferred to the decorative substrate, and an oil-based pigment-based ink is applied to the surface of the transferred ink image-receiving layer according to image information by an ink jet printer. To produce an image and produce a decorative board.

Example 1
A substrate sheet made of polyethylene terephthalate having a thickness of 38 μm (trade name; Lumirror S10, manufactured by Toray) was coated with an image-receiving layer coating solution 1 so as to have a thickness of 10 μm at the time of drying with a Meyer bar coater. The ink image-receiving layer transfer sheet 1 was prepared by applying and drying the thermal adhesive layer coating solution 1 on the Meyer bar coater so as to have a thickness of 4 μm when dried. Next, the image receiving layer was thermally transferred onto the plastic decorative substrate by heating and pressurizing with two rubber rolls heated to 130 ° C. with the heat adhesive layer surface of the obtained ink image receiving layer transfer sheet facing the plastic decorative substrate. It was. Next, an image was printed on the surface of the ink image-receiving layer with an oil-based pigment-based ink jet printer (trade name; JV-3, manufactured by Mimaki Engineering Co., Ltd.) to prepare a decorative board.
Ink image-receiving layer coating solution 1
Urethane resin (trade name; Adekabon titer HUX-260, solid content 34%, manufactured by Asahi Denka) 50 parts by weight Methanol 50 parts by weight Thermal adhesive layer coating solution 1
Urethane resin (trade name: Samprene IB-104, solid content 30%, softening point 110 ° C., manufactured by Sanyo Chemical) 40 parts by weight Methyl ethyl ketone 60 parts by weight

(Example 2)
A decorative board was produced in the same manner as in Example 1 except that the ink image-receiving layer coating solution 2 was used as the ink image-receiving layer coating solution.
Ink image-receiving layer coating solution 2
Vinyl chloride-vinyl acetate copolymer (trade name: VAGH, manufactured by Union Carbide) 20 parts by weight Methyl ethyl ketone 80 parts by weight

(Example 3)
A decorative board was produced in the same manner as in Example 1 except that the ink image-receiving layer coating solution 3 was used as the ink image-receiving layer coating solution.
Ink image-receiving layer coating solution 3
Chlorinated polypropylene resin (trade name: Supercron 832L, solid content 30%, manufactured by Nippon Paper Chemicals) 50 parts by weight Toluene 50 parts by weight

Example 4
A decorative board was produced in the same manner as in Example 1 except that the ink image-receiving layer coating solution 4 was used as the ink image-receiving layer coating solution.
Ink image-receiving layer coating solution 4
Vinyl chloride-vinyl acetate copolymer resin (trade name; VAGH, manufactured by Union Carbide) 8 parts by weight Methacrylic acid methyl ester resin (trade name; Dianal BR-83, manufactured by Mitsubishi Rayon) 4 parts by weight MEK 48 parts by weight Toluene 40 weights Part

(Example 5)
A decorative board was prepared in the same manner as in Example 1 except that the ink image-receiving layer coating solution 5 was used as the ink image-receiving layer coating solution.
Ink image-receiving layer coating solution 5
Vinyl chloride-vinyl acetate copolymer resin (VAGH Union Carbide) 8 parts by weight Urethane resin (Solid content 42% Samprene IB-582, Sanyo Kasei) 20 parts by weight MEK 30 parts by weight Toluene 42 parts by weight

(Comparative Example 1)
A decorative board as in Example 1 except that the ink image-receiving layer coating solution 6 was used as the ink-image-receiving layer coating solution and an aqueous pigment-based inkjet printer (trade name; JV-4, manufactured by Mimaki Engineering) was used as the printer. Was made.
Ink image-receiving layer coating solution 6
Silicon dioxide (trade name: Leoroseal QS-30, manufactured by Tokuyama) 10 parts by weight Polyvinyl alcohol (trade name: PVA205, manufactured by Kuraray) 30 parts by weight Boric acid 7 parts by weight
Diethylene glycol monobutyl ether 0.3 parts by weight Polydiallyldimethylammonium chloride cationic resin (trade name: PAS-H-5L, manufactured by Nitto Boseki) 1.5 parts by weight Ion-exchanged water 51.2 parts by weight

(Evaluation)
Image quality (design)
Observe the image quality of the resulting decorative board.
○: Excellent dot reproducibility and particularly high image quality. X: The dot reproducibility is poor and the image quality is inferior.
Water resistance After the obtained decorative board is immersed in water at 25 ° C. for 24 hours, the state of the image receiving layer is observed.
: No change. X: The image receiving layer peels off.
Non-image area durability The adhesive force of the weight part on which the inkjet ink was not printed on the surface of the decorative board was measured by a cross-cut tape peeling method of the JIS K 5600 coating film general test method.
○: No peeling of the image receiving layer. X: There is peeling of the image receiving layer.
Image line endurance The adhesive strength of the weight part on which the ink-jet ink on the decorative board surface was printed was measured by the cross-cut tape peeling method of JIS K 5600 coating film general test method.
: No peeling of the image receiving layer. X: There is peeling of the image receiving layer.

The above evaluation results are shown in Table 1.

FIG. 2 is a schematic cross-sectional view showing the form of the ink image-receiving layer transfer sheet of the present invention. It is a schematic cross section which shows the form by which the ink image receiving layer was transcribe | transferred on the decorative substrate produced by the method of this invention. It is a schematic cross section which shows the form of the decorative board produced by the method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Ink image receiving layer transfer sheet 2 ... Base material sheet 3 ... Ink image receiving layer 4 ... Thermal adhesive layer 5 ... Cosmetic substrate 6 ... Cosmetic board 7 ... Inkjet ink

Claims (3)

A step of superimposing an ink image-receiving layer transfer sheet and a decorative substrate, each of which is provided with at least an ink image-receiving layer and a thermal adhesive layer on a base sheet, and thermally transferring the ink image-receiving layer to the decorative substrate by heating and pressing; In the ink image-receiving layer transfer sheet for use in a method for producing a decorative board comprising a step of forming an image by ejecting oil-based pigment-based ink in accordance with image information to an ink image-receiving layer formed on the decorative substrate according to image information, An ink image-receiving layer transfer sheet, wherein the ink image-receiving layer contains a thermoplastic resin. 2. The ink image-receiving layer transfer sheet according to claim 1, wherein the thermoplastic resin is a chlorine-containing resin. 3. The ink image-receiving layer transfer sheet according to claim 2, wherein the chlorine-containing resin is at least one selected from vinyl chloride resin, vinyl chloride vinyl acetate copolymer resin, chlorinated polyolefin resin, and derivatives thereof.

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