WO2012147829A1 - 水圧転写方法、水圧転写フィルム用塗布剤及び水圧転写品 - Google Patents
水圧転写方法、水圧転写フィルム用塗布剤及び水圧転写品 Download PDFInfo
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- WO2012147829A1 WO2012147829A1 PCT/JP2012/061168 JP2012061168W WO2012147829A1 WO 2012147829 A1 WO2012147829 A1 WO 2012147829A1 JP 2012061168 W JP2012061168 W JP 2012061168W WO 2012147829 A1 WO2012147829 A1 WO 2012147829A1
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- coating agent
- hydraulic transfer
- resin composition
- curable resin
- ultraviolet curable
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
- B44C1/175—Transfer using solvent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
- B44C1/175—Transfer using solvent
- B44C1/1758—Decalcomanias applied under pressure only, e.g. provided with a pressure sensitive layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
Definitions
- the present invention reproduces (recovers) the adhesion of a dry printed pattern on a hydraulic transfer film to be hydraulically transferred to the surface of the article to be decorated, and then hydraulically transfers the printed pattern to the article.
- the present invention relates to a method, a coating material for a hydraulic transfer film used in this method, and a hydraulic transfer product formed by this method.
- a hydraulic transfer film having a water-insoluble printing pattern is floated on the water surface in the transfer tank on the water-soluble film (carrier film). After the water-soluble film of the hydraulic transfer film is wetted with water, the article (transfer object) is pushed into the water in the transfer tank while being in contact with the printing pattern of the hydraulic transfer film.
- a water pressure transfer method is used in which a decorative layer is formed by transferring a print pattern of a water pressure transfer film to the surface of an article using water pressure generated against the water.
- the hydraulic transfer film is stored on a water-soluble film in which a print pattern is printed and dried and wound into a roll, the ink of the print pattern is in a dry state that loses adhesion.
- a solvent such as an activator or thinner to the printed pattern on the hydraulic transfer film so that the printed pattern is in a wet state just after printing (returns to an adhesive state).
- the treatment is usually referred to as an activation treatment.
- the decorative layer formed on the surface of the article by hydraulic transfer in this way is mechanically and chemically protected by abrasion, solvent resistance, chemical resistance, weather resistance, etc., and has high strength on the surface of the article. It is required that it does not adhere and peel.
- a decorative layer is formed by hydraulic transfer without imparting a topcoat layer on the decorative layer, while providing the wear resistance, solvent resistance, etc. to the decorative layer itself.
- Patent Documents 1 to 3 an ultraviolet curable resin composition containing a non-solvent activating component such as a photopolymerizable monomer that reproduces (recovers) adhesion to a dry printed pattern of a hydraulic transfer film is formed on the transfer film.
- the adhesion of the print pattern is reproduced by the activation component of the UV curable resin composition applied to the print pattern, and the UV curable resin composition penetrates the entire print pattern and the print pattern and the UV curable resin composition.
- the decorative layer formed by the print pattern is also UV cured.
- the decorative layer itself is provided with chemical and mechanical surface protection functions such as solvent resistance and wear resistance.
- the present applicant applied the ultraviolet curable resin composition to the hydraulic transfer film in this way to reproduce (recover) the adhesion of the dried print pattern, and to make the print pattern ultraviolet curable.
- an ultraviolet curable resin composition is infiltrated into and mixed with a printed pattern, and a coating agent (active agent) suitable for unifying the printed pattern and the ultraviolet curable resin composition has been proposed (Patent Document) 4).
- the coating agent according to Patent Document 4 can improve physical properties such as the strength and chemical resistance of the decorative layer formed on the surface of the article by hydraulic transfer, and can improve the initial adhesion to the article surface. A good decorative layer can be obtained.
- the tactile sensation has various aspects in combination of a soft and soft feeling and a wet and dry feeling, but when a soft feeling or a wet feeling (moisture feeling or moist feeling) becomes dominant, it becomes a warm touch feeling.
- Softness is related to the area where the surface is deformed when touched by a finger and touches the belly of the finger, and it feels more flexible as the contact area increases, and the wet feeling feels moist when the back of the fingerprint is stimulated Is known (see Patent Document 5).
- the following method can be considered. (1) A method of applying a top coat containing a paint that gives such a tactile sensation to a hydraulic transfer product. (2) A method of adding a tactile sensation providing layer having a wet feeling and a soft feeling under the printing pattern of the transfer film.
- the method of forming the decorative layer on the surface of the article by activating the printing pattern of the transfer film with the UV curable resin composition coating agent and hydraulically transferring it is not possible with chemicals such as solvent resistance and abrasion resistance on the decorative layer itself. Therefore, the top coat itself is unnecessary, and a touch feeling such as a soft feeling or a wet feeling cannot be given by the method (1).
- the transfer film since the transfer film has a tactile sensation providing layer under the print pattern and has a multilayer structure, the print pattern is activated when the printing pattern ink of the transfer film is activated and hydraulically transferred.
- the wet state is changed by the touch-sensitive layer underneath, and this adversely affects the transfer of the printed pattern.
- the surface of the hydraulic transfer product is covered with the touch-sensitive layer. There is a possibility that the surface protection function possessed by the tactile sensation providing layer may be hindered.
- a non-smoothing agent such as wood powder, plastic powder, rubber powder, inorganic powder, or pigment is mixed in the activator.
- a hydraulic transfer method in which this non-smoothing agent is attached to the printing surface to give a fine unevenness to the decorative layer (see Patent Document 6).
- the activator used in this method is a solvent-type activator generally used in the past, and this activator is an ultraviolet curable resin composition that does not require the solvent described in Patent Documents 1 to 4.
- the decorative layer does not have a surface protection function. Therefore, when a top coat is applied on the decorative layer in order to provide the surface protection function, the feeling of unevenness is lost, and it is impossible to provide both the feeling of unevenness and the surface protection function.
- the top coat is applied in this way, the uneven portion is inside the top coat and is not accompanied by the deformation of the uneven portion even when pressed with a finger, and therefore, the tactile feeling is combined with a wet feeling and a soft feeling on the decorative layer.
- the tactile feeling is combined with a wet feeling and a soft feeling on the decorative layer.
- this technique gives some surface irregularities to the decorative surface such as a wood grain pattern, marble pattern, etc., and actual wood, name stone etc. due to some surface roughness felt through the top coat applied on it.
- This is a technique for obtaining a tactile sensation similar to the surface of the material, and does not provide a tactile sensation such as a soft feeling or a wet feeling on the decorated article surface.
- Patent Document 6 when the technique according to Patent Document 6 is applied to a method of forming a decorative layer on the surface of an article by activating a printing pattern of a transfer film with a UV curable resin composition coating agent and transferring it with water pressure, In addition, since it is interposed between the article and the decorative layer, the adhesiveness between the decorative layer and the article is deteriorated and the amount of the non-smoothing agent is increased as compared with the conventional hydraulic transfer product to which the top coat is applied. Since the adhesion of the decorative layer to the article decreases as the unevenness is increased, the technique of Patent Document 6 cannot be simply applied.
- the first problem to be solved by the present invention is to apply the UV curable resin composition coating agent to the printing pattern of the hydraulic transfer film to recover the adhesion of the printing pattern, and to transfer the printing pattern to the surface of the article by hydraulic pressure.
- this UV curable resin composition penetrates the entire printing pattern and imparts a chemical and mechanical surface protection function to the decorative layer itself by UV curing of the decorative layer.
- An object of the present invention is to provide a hydraulic transfer method capable of imparting a tactile sensation in which a soft feeling and a wet feeling are arbitrarily combined to the surface of a decorative layer by a special component added to a coating agent.
- the second problem to be solved by the present invention is that the UV curable resin composition coating agent is applied to the printing pattern of the hydraulic transfer film to recover the adhesion of the printing pattern, and the printing pattern is hydraulically transferred to the surface of the article.
- this UV curable resin composition penetrates the entire printing pattern and imparts a chemical and mechanical surface protection function to the decorative layer itself by UV curing of the decorative layer.
- An object of the present invention is to provide a coating agent for a hydraulic transfer film that can give a tactile sensation in which a soft feeling and a wet feeling are arbitrarily combined on the surface of a decorative layer by a special component added to the coating agent.
- the third problem to be solved by the present invention is to apply the UV curable resin composition coating agent to the printing pattern of the hydraulic transfer film to recover the adhesion of the printing pattern, and to transfer the printing pattern to the surface of the article by hydraulic pressure.
- this UV curable resin composition penetrates the entire printing pattern and imparts a chemical and mechanical surface protection function to the decorative layer itself by UV curing of the decorative layer.
- An object of the present invention is to provide a hydraulic transfer product having a decorative layer provided with a tactile sensation in which a soft feeling and a wet feeling are arbitrarily combined by a special component added to a coating agent.
- volume shrinkage ratio (hereinafter simply referred to as “volume shrinkage ratio”) of the activating component of the UV curable resin composition coating agent and specified it at a specific rate.
- volume shrinkage ratio the volume shrinkage ratio of the activating component of the UV curable resin composition coating agent
- the decoration layer can be provided with a mechanism for generating a tactile sensation in which a soft feeling and a wet feeling are arbitrarily combined, and the basic principle of the present invention is such a specific ultraviolet curing.
- the following first to third problems of the present invention are to provide a decorative layer having a self-surface protecting function with a soft feeling and a wet feeling by performing hydraulic transfer using a resin composition coating agent. A solution is provided based on this principle.
- a means for solving the first problem of the present invention is that a photopolymerizable component having at least a photopolymerizable monomer on a print pattern of a hydraulic transfer film having a print pattern dried on a water-soluble film and a photopolymerization initiator. And the adhesive of the printed pattern is recovered by an activating component of the ultraviolet curable resin composition, and the printed pattern is hydraulically transferred to the surface of the article.
- the decorative layer is formed as an integrated layer in which a decorative layer is formed on the surface, and the ultraviolet curable resin composition coating agent penetrates the entire printed pattern and the printed pattern and the ultraviolet curable resin composition are mixed. Water pressure transfer method, wherein the decorative layer itself is provided with a chemical and mechanical surface protection function by UV curing of the decorative layer.
- the photopolymerizable monomer of the ultraviolet curable resin composition as the coating agent has a functional group of 3 or less and a volume shrinkage of 20% or less, and the coating agent has an average particle size of 5 to 50 ⁇ m.
- Another object of the present invention is to provide a hydraulic transfer method comprising resin beads having a diameter, wherein the ultraviolet curable resin composition and the resin beads are blended in an amount of 100 parts by weight to 15 to 100 parts by weight.
- the second problem-solving means of the present invention comprises: a photopolymerizable component having at least a photopolymerizable monomer on the print pattern of a hydraulic transfer film having a print pattern dried on a water-soluble film; and a photopolymerization initiator.
- the ultraviolet curable resin composition coating agent is applied, the adhesiveness of the printed pattern is recovered by the activation component of the ultraviolet curable resin composition, and the printed pattern is hydraulically transferred to the surface of the article to be applied to the surface of the article.
- the decorative layer is formed as an integrated layer in which the decorative layer is formed and the ultraviolet curable resin composition coating agent is permeated throughout the printed pattern to mix the printed pattern and the ultraviolet curable resin composition.
- the photopolymerizable monomer of the ultraviolet curable resin composition has a functional group of 3 or less and a volume shrinkage of 20% or less, and the coating agent is 5 to
- a coating agent for a hydraulic transfer film comprising resin beads having an average particle diameter of 50 ⁇ m, wherein the ultraviolet curable resin composition and the resin beads are blended in an amount of 100 parts by weight to 15 to 100 parts by weight. Is to provide.
- the resin beads preferably have a glass transition temperature of ⁇ 50 to 100 ° C. (measured in accordance with JIS K7121).
- the polyurethane beads preferably have a glass transition temperature (measured in accordance with JIS K7121) of ⁇ 50 to 50 ° C.
- the photopolymerizable oligomer preferably has a glass transition temperature Tg of 40 ° C. or lower.
- the coating agent further contains fine particle silica having an average particle size of 0.005 to 10 ⁇ m, and the fine particle silica comprises 100 parts by weight of resin beads and fine particle silica. It is preferably blended at a ratio of 0.5 to 10 parts by weight.
- the coating agent preferably further contains a reactive silicone-based component.
- the coating agent preferably further contains a polyol.
- the coating agent is in a two-part form of a first liquid containing a photopolymerizable component (at least a photopolymerizable monomer) and a second liquid containing a non-reactive resin,
- the other components are preferably blended in any liquid.
- the third problem solving means of the present invention is to provide a hydraulic transfer product having a decorative layer formed by the first problem solving means.
- an ultraviolet curable resin composition of a coating agent that is applied to a printing pattern of a transfer film to activate it and penetrates the entire printing pattern to impart a chemical and mechanical surface protection function to the resulting decorative layer.
- the photopolymerizable monomer has a functional group of 3 or less and a volume shrinkage of 20% or less, and the coating agent contains resin beads having an average particle size of 5 to 50 ⁇ m, and an ultraviolet curable resin composition; Since the resin beads are blended in a ratio of 100 parts by weight to 15 to 100 parts by weight, the top coat depends on the surface irregularities obtained by the specific average particle size of the resin beads and the appropriate volume shrinkage of the photopolymerizable monomer. It is possible to give a tactile sensation in which a wet feeling and a soft feeling are arbitrarily combined to the decorative layer without applying a multi-layer structure and without making the transfer film have a multilayer structure.
- FIG. 3 is a schematic diagram of hydraulic transfer performed by the method of the present invention. It is drawing which shows typically each process of the method of performing the hydraulic transfer to articles
- FIG. 1 schematically shows a water pressure transfer method to which the present invention is applied.
- the transfer film 20 composed of the conductive film (carrier film) 30 is supplied and floated on the water 50 in the transfer tank so that the print pattern 40 is the upper surface, and the article 10 to be hydraulically transferred is passed through the transfer film 20.
- This is a method in which the water pressure is transferred by being pushed into the water 50.
- the water-soluble film 30 is made of a water-soluble material mainly composed of, for example, polyvinyl alcohol that absorbs water and gets wet and softens.
- the water-soluble film 30 touches the water 50 in the transfer tank at the time of water pressure transfer, and is attached to the article to be decorated so that water pressure transfer can be performed.
- the print pattern 40 is previously applied on the water-soluble film 30 by gravure printing or the like, and before storing the transfer film in a roll-like state, before the hydraulic transfer. Is in a dry solidified state in which adhesion is completely lost.
- the printed pattern 40 includes a solid (non-patterned) printed layer in addition to a pattern in a strict sense.
- the hydraulic transfer method to which the present invention is applied includes an ultraviolet curable resin composition 62 as a main component on the print pattern 40 of the transfer film 20 before hydraulic transfer to the article 10 (see FIG. 2A).
- the coating agent (activator) 60 to be applied is applied (see FIG. 2B), and the adhesion of the printing pattern 40 is restored (reproduced) by the non-solvent activating component in the ultraviolet curable resin composition and the entire printing pattern 40 (all In this method, the ultraviolet curable resin composition 62 is permeated and absorbed in the area and the total thickness), and the ultraviolet curable resin composition 62 is mixed in the print pattern 40 to perform hydraulic transfer (see FIG. 2C).
- a pattern (integrated layer) 46 is formed (see FIG. 2D). *
- the transfer film 20 having the ultraviolet curable resin composition mixed printing pattern 46 in which the adhesiveness is recovered by the ultraviolet curable resin composition 62 and the ultraviolet curable resin composition 62 is mixedly formed in the entire printing pattern 40.
- the ultraviolet curable resin composition 62 in the ultraviolet curable resin composition mixed printing pattern 46 is printed on the printed pattern 40. Therefore, this is equivalent to the case where the ultraviolet curing property is imparted to the printing pattern 40 itself. Therefore, the decorative layer 44 formed by the transfer of the ultraviolet curable resin composition mixed print pattern 46 has a surface protection function by itself when the ultraviolet curable resin composition is dispersed and ultraviolet cured. (See FIG. 3).
- the irradiation of the ultraviolet ray 70 in FIG. 2F is preferably performed while the water-soluble film 30 of the hydraulic transfer film 20 is wound around the article 10 to which the ultraviolet curable resin composition mixed print pattern 46 has been transferred.
- the irradiation step is preferably performed after the article is still in the water or after the article is taken out of the water and before the water washing operation for removing the water-soluble film is performed.
- the ultraviolet ray 70 can be irradiated using a known ultraviolet curing device including a light source such as a high-pressure mercury lamp and a metal halide lamp and an irradiator (lamp house).
- the article 10 is washed with water by a shower 72 or the like, and a water-soluble film (swelling dissolution film layer) covering the upper surface of the decorative layer 44 (see FIG. 3) formed on the article 10.
- a water-soluble film swelling dissolution film layer
- the surface is further dried by hot air 74 to complete the decorated article 12 in which the decorative layer 44 is hydraulically transferred to the surface of the article 10 (see FIG. 3).
- the ultraviolet curable resin composition 62 which is the main component of the coating agent 60 of the present invention is a resin that can be cured in a relatively short time by the chemical action of ultraviolet rays, and has already been described in Patent Documents 1 to 4.
- the coating agent of the present invention is characterized by being formed by adding predetermined resin beads 62B (see FIG. 3) to this ultraviolet curable resin composition. is there.
- this coating agent needs to have a predetermined viscosity and ink solubility.
- the ultraviolet curable resin composition has a role of imparting a soft feeling of the decorative layer, while the resin beads impart a wet feeling and one.
- the part also has a role to contribute to the softness, but these roles are due to the fact that the volume shrinkage of the photopolymerizable component, the particle size of the resin beads and the amount added thereof satisfy the specific conditions described in detail later. Achieved.
- the coating agent for a hydraulic transfer film used in the present invention has an ultraviolet curable resin composition as a main component, and the ultraviolet curable resin composition includes a photopolymerizable component having at least a photopolymerizable monomer and a photopolymerization initiator,
- the photopolymerizable monomer has a functional group of 3 or less and a volume shrinkage of 20% or less
- the coating agent includes resin beads having an average particle diameter of 5 to 50 ⁇ m. It is blended in an amount of 15 to 100 parts by weight with respect to 100 parts by weight of the composition.
- the photopolymerizable component includes a photopolymerizable oligomer having 10 or less functional groups.
- the photopolymerizable component of the ultraviolet curable resin composition can be 0 to 65% by weight of photopolymerizable oligomer and 30 to 95% by weight of photopolymerizable monomer. It can mix
- any one of an acrylic oligomer, a polyester oligomer, an epoxy acrylate oligomer, a urethane acrylate oligomer, or the like can be used alone or in any combination.
- the volume shrinkage rate of the photopolymerizable oligomer is preferably 20% or less, similarly to the volume shrinkage rate of the photopolymerizable monomer. The reason is that if the volume shrinkage of this photopolymerizable oligomer exceeds 20%, the resin composition after UV curing becomes too hard and the softness is lowered.
- the photopolymerizable monomer has a role of maintaining the dissolving power of the ink and the adhesion to the surface of the article.
- the photopolymerizable monomer has a functional group of 3 or less, if it is 4 or more, the resin composition after UV curing becomes too hard, and it is difficult to be deformed by pressing with a finger. This is because of a decrease.
- the photopolymerizable monomer is a combination of a bifunctional monomer and a trifunctional monomer rather than a bifunctional monomer alone. It is desirable to do.
- the volume shrinkage of the photopolymerizable monomer is set to 20% or less.
- the volume shrinkage of the photopolymerizable monomer exceeds 20%, the resin composition after UV curing becomes too hard, This is because the softness is lowered.
- ⁇ s is obtained by curing using a UV light source having a wavelength of 365 nm with an integrated light amount of 1558 mJ / cm 2 and a peak intensity of 302 mW / cm 2 .
- Specific examples of the photopolymerizable monomer include 1.6 hexanediol diacrylate, cyclohexyl acrylate, and dipropylene glycol diacrylate as the bifunctional monomer.
- the functional groups of the photopolymerizable monomer and the photopolymerizable oligomer are set to the number of functional groups suitable for the desired softness within the above range, but the most preferable functional group number is the photopolymerizable monomer and the photopolymerizable oligomer. Both are bifunctional groups, and in particular, the photopolymerizable oligomer is preferably a linear functional bifunctional resin. In this way, the decorative layer has elasticity like a spring and is given more preferable flexibility.
- the photopolymerization initiator is for initiating the photopolymerization reaction of the photopolymerizable oligomer and the photopolymerizable monomer, but in the coating agent (activator) of the present invention, the ultraviolet curable resin composition is dried and solidified. It is preferable that the photopolymerization initiator contains both the surface curable photopolymerization initiator and the internal curable photopolymerization initiator in order to dissolve the existing ink and penetrate into the print pattern.
- the surface curable photopolymerization initiator for example, a hydroxyketone system can be used, and as the internal curable photopolymerization initiator, for example, an acylphosphine oxide system can be used.
- the average particle size of the resin beads 62B added to the coating agent is set to 5 to 50 ⁇ m because if the particle size is less than 5 ⁇ m, the resin beads do not contact the bottom of the fingerprint groove when touching the decoration layer. This is because when the lack of tactile sensation occurs and the particle size exceeds 50 ⁇ m, the surface of the decorative layer is in a sparse state, resulting in excessive appearance defects.
- the particle diameter of the resin beads is a value (median diameter: D 50 ) measured and averaged by a laser diffraction particle size distribution analyzer in accordance with the laser diffraction method of JIS Z8825-1. Further, the preferable addition amount of the resin beads is 15 to 100 parts by weight with respect to 100 parts by weight of the ultraviolet curable resin composition. The reason is described in detail while comparing the examples of the present invention with the comparative examples. State
- the particle size of the resin beads is set to a value suitable for the desired wet feeling within the above range, but the wet feeling is given by the surface irregularities (see FIG. 3) when the surface of the decorative layer is boiled. Therefore, in addition to the particle size of the resin beads, the blending amount also affects, so the wet feeling of the decorative layer is adjusted by the blending amount and particle size of the resin beads.
- the particle diameter of the resin beads is represented by an average value of various particle diameters, but even if the average particle diameter is the same, resin beads having different particle diameters are mixed together than those having almost the same particle diameter. It is preferable.
- the particle diameter of the resin beads 62B is 5 to 50 ⁇ m, but the decorative layer is so thick that the irregularities are formed as shown in FIG. 3 reflecting the shape of the resin beads 62B. Is set, thereby obtaining a good wet feeling.
- the resin beads 62B can give a soft feeling as well as a wet feeling as a component that the resin beads themselves have a soft feeling, and the resin beads having such characteristics are polyurethane beads. Therefore, it is particularly preferable to use polyurethane beads as the resin beads.
- Fine particle silica which is another additive of coating agent
- fine particle silica having an average particle diameter of 0.005 to 10 ⁇ m
- the blending ratio of the fine particle silica is preferably set to 0.5 to 10 parts by weight with respect to 100 parts by weight of the resin beads.
- the fine particle silica functions as a matting agent, but can further impart thixotropic properties to the coating agent.
- the thixotropic property of the fine-particle silica is arranged between a decorative layer and a transfer object in the form of a bead group (also called a bead lamp) formed by collecting a plurality of resin beads in a lump in a coating agent. Fine irregularities can be formed without increasing the amount of resin beads added, and the tactile sensation in which a soft feeling and a wet feeling due to the ultraviolet curable resin composition are combined can be additionally promoted.
- the reason why the average particle size of the fine-particle silica is 0.005 to 10 ⁇ m is that if the average particle size is less than 0.005 ⁇ m, the thickening of the coating agent becomes so high that the coating operation becomes difficult. This is because if the particle diameter exceeds 10 ⁇ m, the thixotropy of the coating agent is lost, and the coating operation is similarly difficult.
- the numerical value of the particle diameter of the fine particle silica is the image of the magnification at which the particle can be visually recognized with SEM or TEM (transmission electron microscope), and the longest diameter of each of the particle images of 1,000 fine particle silica randomly selected is measured. It is a numerical value obtained by arithmetic mean.
- the amount of the fine particle silica is set to 0.5 to 10 parts by weight. If the amount is less than 0.5 parts by weight, the action of collecting the resin beads is reduced, and the addition amount of the resin beads is not increased. This is because the function of imparting a tactile sensation in which a soft feeling and a wet feeling are combined cannot be exhibited, and when the blending amount exceeds 10 parts by weight, the thickening becomes so high that it is difficult to apply the coating agent. Because it becomes.
- the glass transition temperature Tg of the ultraviolet curable resin composition and the resin beads is an element that adjusts the softness of the decorative layer, but is set so as not to impair the transferability of the print pattern when the print pattern is hydraulically transferred.
- the glass transition temperature Tg of the ultraviolet curable resin composition is adjusted by the glass transition point Tg of the photopolymerizable component, but it is preferable to adjust the glass transition temperature Tg of the photopolymerizable oligomer by including the photopolymerizable oligomer.
- the glass transition temperature of the photopolymerizable oligomer is preferably set to 40 ° C.
- the glass transition temperature of the resin beads is preferably set to ⁇ 50 to 100 ° C.
- the value of these glass preset temperature is a value by DSC method based on JISK7121.
- the value is the value of the TMA method based on JIS K7121.
- the glass transition temperature Tg of the photopolymerizable oligomer When the glass transition temperature Tg of the photopolymerizable oligomer is set to 40 ° C. or lower, the stretchability of the cured UV curable resin composition can be obtained, so that the amount of deformation when the decorative layer is pressed increases and becomes more flexible. A touch can be given and adjustment of a soft feeling becomes easy.
- the lower the glass transition temperature Tg of the photopolymerizable oligomer the softer the touch is imparted to the decorative layer. Therefore, the lower the glass transition temperature Tg is, the more preferable is 0 ° C. or less.
- the glass transition temperature Tg of the resin beads is set to ⁇ 50 to 100 ° C.
- the resin layer is easily deformed when the decoration layer is pressed, and a soft feel can be given to the decoration layer, and the UV curable resin composition can be applied.
- the UV curable resin composition coating agent can be easily applied to the transfer film in relation to the coating property of the agent.
- the glass transition temperature of the resin beads is less than ⁇ 50 ° C.
- the softness of the decorative layer is improved, and a soft feeling combined with the wet feeling is further increased. Due to the high oil absorbency of the resin beads in the coating agent, the viscosity of the UV curable resin composition coating agent tends to increase, so the coating property to the transfer film and the extensibility of the transfer film decrease.
- the glass transition temperature of the resin beads exceeds 100 ° C., the hardness of the resin beads increases, so that the softness imparting action is lowered. Therefore, the glass transition temperature of the resin beads is preferably set in the above range.
- the glass transition temperature Tg is preferably -50 to 50 ° C., which has a lower lower limit value.
- the glass transition temperature Tg of the photopolymerizable oligomer and the resin beads are both 30 ° C. or lower, the printing pattern of the transfer film, that is, the flexibility of the generated decorative layer becomes synergistically favorable, which is preferable for giving a soft feeling.
- the glass transition of the photopolymerizable monomer may not be clearly observed (the glass transition temperature cannot be specified). This does not exclude the use of new photopolymerizable monomers.
- flexibility of a decoration layer can be supplemented by adding a plasticizer to an ultraviolet curable resin composition.
- the plasticizer is not particularly limited as long as it can impart flexibility without significantly impairing basic physical properties required for a decorative layer of a hydraulic transfer article, but a phthalic system such as dibutyl phthalate (DBP).
- DBP dibutyl phthalate
- known compounds such as maleic acid, phosphoric acid and adipic acid can be used.
- the addition amount of the plasticizer is appropriately adjusted according to the balance between the basic physical properties and the flexibility of the decorative layer.
- Reactive silicone component 1 which is still another additive of the coating agent
- a reactive silicone type component can be added.
- the reactive silicone component has a specific gravity smaller than that of the uncured UV curable resin composition. Since a reaction layer of the composition and the reactive silicone component is formed, a more flexible feel can be obtained.
- Specific examples of the reactive silicone component preferable for supplementing flexibility in this way include silicone components having organic functional groups at both ends, but silicone oils having organic functional groups at both ends are more preferable. .
- the functional groups at both ends of the silicone component react with the ultraviolet curable resin composition, and the decorative layer after curing is cured. Near the surface, an arch-shaped silicone molecular chain 80 having both ends bonded to the decorative layer is formed. As shown in FIG. 4B, when the finger F touches the decorative layer 44, the arch-shaped silicone molecular chain 80 is formed. It is considered that a spring action due to the bending and restoration of the film is imparted to the decorative layer 44, and the decorative layer 44 is given a soft feel.
- the functional groups at both ends are not limited to specific ones as long as they have reactivity with the ultraviolet curable resin composition and do not impair the effects of the present invention.
- the ultraviolet curable resin composition is an acrylate type. In some cases, it is preferable to use a silicone component having an acrylate functional group.
- Reactive silicone component 2 which is still another additive of the coating agent
- the friction coefficient of the surface is reduced and slipping is imparted, so that the friction resistance of the decoration layer is improved.
- the reactive silicone component may have a functional group that can add other physical properties to the straight chain.
- the photopolymerizable component both photopolymerizable monomer or photopolymerizable oligomer and photopolymerizable monomer
- the photopolymerizable component is acrylic
- methacryl-modified silicone oil having a methacrylic group in the straight chain is used. Since the crosslinking reaction between the photopolymerizable component and the photopolymerizable component proceeds, the heat resistance and light resistance of the decorative layer can be improved.
- the addition amount of the reactive silicone component can be appropriately set within the range in which the above effects can be obtained. However, if the addition amount is too large, the adhesion between the decorative layer and the article (transfer object) decreases, which is not preferable.
- the preferred addition amount is specifically in the range of 0.1 to 15 parts by weight with respect to the ultraviolet curable resin composition.
- the decorative layer with a tactile sensation in which the balance between the soft feeling and the wet feeling is appropriately adjusted by the cooperation of the components of the ultraviolet component resin composition and the resin beads.
- the coating agent of the present invention has a self-surface protection function by penetration of an ultraviolet curable resin since it can impart to the decorative layer a tactile feel that combines a soft feeling and a wet feeling without impairing the adhesion of the coating film.
- a tactile sensation in which a soft feeling and a wet feeling are arbitrarily combined can be imparted to a decorative layer that does not require a top coat.
- the resin beads In order to prevent the resin beads from falling off when the decorative layer is rubbed, that is, in order to improve the scratch resistance of the decorative layer, the resin beads have a hydroxyl group (OH group) bonded end on the surface. It is preferable to add a component having an isocyanate group to the ultraviolet curable resin composition. The reason is presumed as follows. That is, the hydroxyl group on the surface of the resin bead reacts with the isocyanate group of the component having an isocyanate group (NCO group) to form a molecular chain connected to the resin bead by urethane bonding. By being entangled with the crosslinked structure, the resin beads are more firmly fixed to the decorative layer.
- the component having an isocyanate group may be a non-photopolymerizable isocyanate or an isocyanate-modified photopolymerizable component.
- the ultraviolet curable resin component and the resin beads are chemically bonded by a urethane bond.
- the greater the number of hydroxyl groups in the resin beads the greater the effect of preventing the resin beads from falling off. Can be adjusted to a number.
- the amount of isocyanate added is appropriately set according to the number of hydroxyl groups (OH groups) on the surface, but the ratio of the number of isocyanate groups to the number of hydroxyl groups is preferably approximately 1 or more, particularly set to be 1.5 times or more. More preferably.
- a polyol may be added to the ultraviolet curable resin composition in addition to the above-described component having an isocyanate group. Since polyol reacts with an isocyanate group to form a urethane, the polyol is linked to form a longer molecular chain on the resin bead. This molecular chain is easily entangled by the cross-linked structure of the photopolymerizable component, preventing the resin bead from falling off. The effect can be further improved.
- the more the number of hydroxyl groups (the greater the number of functional groups), the more polyols the reactive sites with the isocyanate component increase, making the molecular chain more easily entangled with the cross-linked structure of the photopolymerizable component.
- the drop-off preventing effect is further improved, and the mechanical properties of the decorative layer are also improved.
- the polyol is a branched polyol, a more complicated cross-linked structure can be formed, which is particularly effective for preventing the resin beads from falling off and improving the mechanical properties of the decorative layer.
- the effect increases as the number of side chains increases (the number of hydroxyl groups increases as the number of branches increases).
- the isocyanate addition amount is preferably set so that the ratio of the number of isocyanate groups to the sum of the number of hydroxyl groups of the resin beads and the number of hydroxyl groups of the polyol is 1 or more.
- a hydroxyl group is introduced into a part of the photopolymerizable component of the ultraviolet curable resin, and the resin having an isocyanate group added to the ultraviolet curable resin composition is mediated as a resin. It is good also as a structure which connects a bead and a photopolymerizable component by a urethane bond. This urethane reaction may be carried out by heating after UV curing, or may be performed simultaneously with UV curing by using heat generated during UV irradiation or by heating simultaneously with UV irradiation.
- the isocyanate component in the first to third preventive measures and the polyol component in the second preventive measure are not particularly limited as long as the effect of preventing the resin beads from falling off can be obtained. From the viewpoint of hydrolysis resistance, a polycarbonate is preferable.
- UV curable resin composition 100 parts by weight (breakdown)
- the ultraviolet curable resin composition contains the following components (1) to (3) in the following proportions.
- (1) Photopolymerizable oligomer 0 to 65% by weight (2) Photopolymerizable monomer 30 to 95% by weight (3) Photopolymerization initiator 5 to 10% by weight
- the ultraviolet curable resin composition may contain the following additives (4) to (6), but the blending ratio of the amounts of these additives is the sum of (1) to (3). (100% by weight). Therefore, the weight% of the entire ultraviolet curable resin composition including the additive exceeds 100% by weight.
- Non-reactive resin 2-12% by weight (5) Light resistance imparting agent UV-A 0.5 to 8% by weight HALS 1.5-3.5% by weight (6) Leveling agent 0.01-0.5 wt% (7) Solvent 5-50% by weight (II) 15 to 100 parts by weight of resin beads (III) Additive A (Abrasion resistance improver) When resin beads are surface-modified with hydroxyl groups added (8) Component having isocyanate group Compounding amount in which ratio of isocyanate group number to hydroxyl group number on resin bead surface is 1 or more (9) Polyol Damage to film physical properties of decorative layer Addition amount not in range (IV) Additive B (resin bead assembly agent) (10) Particulate silica 12.5-37.5 parts by weight per 100 parts by weight of resin beads (V) Additive C (flexibility reinforcing agent and wear resistance improving agent) (11) Both-end reactive silicone component 0.1 to 15 parts by weight with respect to the ultraviolet curable resin composition of (I)
- the optional non-reactive resin (4) may be an acrylic polymer, and the non-reactive resin is a mechanical property of a decorative layer formed by hydraulic transfer. And physical properties such as chemical characteristics and the adhesion between the transfer object and the decorative layer.
- the light resistance-imparting agent (5) can contain an ultraviolet absorber (hereinafter referred to as UV-A) and a hindered amine light stabilizer (hereinafter referred to as HALS).
- UV-A ultraviolet absorber
- HALS hindered amine light stabilizer
- the light resistance can be improved while maintaining the adhesion
- the leveling agent (6) can adjust the fluidity of the coating agent without impairing the adhesion of the decorative layer.
- the coating agent of the present invention may contain a solvent for the purpose of adjusting the viscosity so that the coating agent can be easily applied and for dispersing the non-reactive resin as an additive.
- ⁇ Solvent '' contained in this coating agent has characteristics that do not hinder the activation of the printing pattern by the photopolymerizable monomer of the UV curable resin composition that is the main component of the coating agent (solubility for the printing pattern) and addition It should be understood that it should be used in quantities.
- the fundamental difference between the solvent-based coating agent (activator) and the non-solvent activating component of the UV curable resin composition is that the former activator volatilizes the solvent component after coating, so the ink adhesion is reproduced.
- the adhesive property of the ink is reproduced with a photopolymerizable monomer component that does not volatilize in the latter coating agent (activator component used in the present invention). It does n’t change.
- the activator of the present invention does not impair the plastic state of the ink even if the solvent coexists within the range satisfying the above condition, as long as the blending amount of the photopolymerizable monomer is in a specific range.
- a preferable addition amount of the solvent for such purpose is 5 wt% to 50 wt% with respect to the total of the photopolymerizable oligomer, the photopolymerizable monomer, and the photopolymerization initiator in the ultraviolet curable resin composition. is there.
- a transfer film having a printing pattern formed from an ink containing resin beads having the same components as those added to the coating agent of the present invention may be used.
- the tactile sensation imparting effect can be supplementarily improved.
- the amount of resin beads added in the coating agent is reduced, the viscosity of the coating agent can be adjusted low, so that the coating property of the coating agent can be improved, and the resin beads are also provided on the transfer film side. Therefore, even if the coating amount of the coating agent is reduced, the touch feeling is not lowered.
- the resin beads added for imparting a soft feel to the decorative layer are different from conventional resin beads added for matting, and have a low glass transition temperature Tg and high oil absorption.
- Tg glass transition temperature
- the coating agent is stored in a poor environment such as a high-temperature atmosphere, there is a concern that the coating agent will thicken and solidify when used as a matting agent. It is preferable that such a concern is resolved when the liquid is separated from the first liquid and added to the second liquid for storage.
- this storage form since the amount of resin beads added can be adjusted at the time of use, there is an additional effect that can be adjusted to a desired tactile sensation imparting effect by the coating agent.
- the second liquid containing the resin beads is dispersed in a low-reactivity solvent in order to facilitate dispersibility and workability in the mixing operation into the first liquid, or in the form of a paste
- a known dispersant may be added to improve dispersibility.
- a low-reactivity solvent a solvent for paints such as a long-chain hydrocarbon-based mixed solvent or mineral spirit can be used, and this solvent is used for the ultraviolet curable resin composition which is the main component of the coating agent.
- the resin beads are a combination of a plurality of resin beads having different types and properties
- the plurality of resin beads may be mixed with the second liquid, or each resin bead may be pasty or liquid.
- a plurality of divided second liquids (for example, second A liquid, second B liquid, etc.) may be used.
- the degree of tactile sensation due to the coating agent can be adjusted more finely.
- the non-reactive resin when a non-reactive resin is added to the coating agent of the present invention, the non-reactive resin may induce thermal polymerization of the ultraviolet curable resin composition when the temperature rises, so that it is a two-part solution.
- the non-reactive resin is preferably blended in the second liquid.
- Tables 1 to 6 show various components used in Examples and Comparative Examples of the present invention, and Tables 1 and 2 show ultraviolet curable resin compositions A (oligomer / monomer system) and B (monomer system), Table 3 shows 6 different oligomer brands, Table 4 shows 6 different monomer brands, Table 5 shows 12 different resin bead brands, and Table 6 shows 5 different fine particle silica brands as additional additives. Indicates.
- the oligomer monomers in the compositions of Tables 1 and 2 were prepared by selecting from the brands of Tables 3 and 4.
- butyl carbitol acetate was added as a solvent in the case where the composition had a high viscosity (Examples 4, 17, 19, 32 and later in Table 7 and Comparative Examples). 4, 6).
- Tables 7 to 11 show the main components, additive components and evaluation of the coating agent according to the examples of the present invention
- Table 12 shows the main components, additive components and evaluation of the coating agent according to the comparative example.
- “Evaluation” refers to the coating property of the coating agent, the softness, wetness, and abrasion resistance of the decorative layer of the article obtained by hydraulic transfer using this coating agent, and the surface of the article. And adhesion.
- the coating agents of Examples 34 to 36 use a monomer-based (non-oligomer) ultraviolet curable resin B, and the other coating agents of Examples 1 to 33 are oligomer / A monomer-based ultraviolet curable resin composition A was used.
- the components of the ultraviolet curable resin compositions A and B were also used in the two example groups using the same ultraviolet curable resin compositions A and B.
- Monomer resin bead components
- particle size glass transition temperature
- blending amount were varied for each example within the specific range of the present invention.
- the coating agents of Examples 1 to 19 do not have any additional additives, but Examples 20 to 36 and Examples 43 and 44 are additives A (abrasion resistance improver) or B (resin beads).
- additive C reactive silicone component
- Examples 41 and 42 are the same as in Examples 2 and 34, respectively, in which a first liquid composed of components excluding resin beads, 50% by weight of mineral spirits and resin beads are mixed and dispersed with respect to the weight of the resin beads. In these examples, the first liquid and the second liquid were mixed and diffused to form a coating agent.
- all the comparative examples used the oligomer / monomer-based UV curable resin composition A, but the components of the UV curable resin composition A (photopolymerizable oligomer and / or photopolymerizable monomer), resin beads Any one of the components, particle size, glass transition temperature, and blending amount was excluded from the specific conditions of the present invention and varied for each comparative example.
- the particle size of the resin beads was measured by a laser diffraction type particle size distribution measuring apparatus (Shimadzu Corporation SALD-2000J) in accordance with the laser diffraction method of JIS Z8825-1 (average value) Unit diameter: D 50 ), and the particle diameter of the fine particle silica was a value measured using TEM (H-8100, manufactured by Hitachi High-Tech).
- each item of the evaluation in Table 7-11 was set as follows. (1) Coating property Immediately before the transfer film is introduced into the transfer tank, each activator is applied on the printed pattern of the transfer film with a thickness of about 20 ⁇ m by the Miyabar coating method. “ ⁇ ” when the film thickness is good, “ ⁇ ” when the coating workability is inferior but coating is possible within the practical range, and “X” when coating onto the transfer film is difficult. (2) Flexibility Instead of the coating agent of the examples of the present invention, a coating agent comprising a solvent-free UV curable resin composition called “Ubic S Clear HE” manufactured by Ohashi Chemical Industry Co., Ltd.
- the article is expressed as 10 points, and 10 subjects are asked to express the feeling of softness felt by each subject when they touch each sample (hydraulic transfer product according to Examples and Comparative Examples, hereinafter the same), by the number of points.
- Point decimal point Below truncation
- ⁇ 6 to 10 points
- 5 to 3-point ⁇
- 2 to point 1 was to evaluate the 0 point as " ⁇ ”.
- a coating agent comprising a solvent-free ultraviolet curable resin composition called “Ubic S Clear HE” manufactured by Ohashi Chemical Industry Co., Ltd.
- Apply a commercially available wet feeling paint product name “Rabiflex” manufactured by Ohashi Chemical Industry Co., Ltd.
- a commercially available wet feeling paint product name “Rabiflex” manufactured by Ohashi Chemical Industry Co., Ltd.
- 10 points are given to each article, and the wet feeling felt by each subject when 10 subjects touch each sample is expressed in terms of the number of points. 10 points " ⁇ ", " ⁇ " 5 to 3-point, 2 to point 1 " ⁇ ", was to evaluate the 0 point as " ⁇ ".
- Example 17 when polyurethane beads having a glass transition temperature of ⁇ 50 to 50 ° C. are used, more preferable softness and wet feeling are obtained.
- Table 8 the coating property evaluation results of Example 15 and Example 17 are both “x”, but in this evaluation, the coating of Example 17 was significantly more than that of Example 15. It was confirmed that the workability was poor. This is because, as in Example 17, when the glass transition temperature of the resin beads is less than ⁇ 50 ° C., the oil absorbency of the resin beads in the UV curable resin composition coating agent before curing is large. This is because the viscosity of the ultraviolet curable resin composition coating agent has increased.
- Example 26 and Example 27 Comparing Example 26 and Example 27, when the particle size of the fine particle silica exceeds 10 ⁇ m, both the softness and the wet feeling decrease, which is not preferable. It can be seen that even if the existing particle size is 0.007 ⁇ m, it is possible to obtain a coating property that does not interfere with practical use while maintaining a preferable tactile sensation. It is presumed that there is an impediment to practical application properties. From the evaluation of the soft feeling and wet feeling of Examples 24 to 30 and Examples 31 and 32, it can be seen that the preferred addition amount of fine particle silica is 12.5 to 37.5 parts by weight with respect to 100 parts by weight of the resin beads. .
- Example 2 From the comparison between Example 25 and Example 33, as in Example 33, when an OH-treated isocyanate is used, the resistance due to the combination of hydroxyl-treated resin beads and isocyanate in a fine particle silica addition system is also demonstrated. It can be seen that an abrasion effect is obtained.
- Example 3 When Example 2, 23, 33 and Example 34, 35, 36 are compared, and the other components are the same, the oligomer / monomer UV curable resin composition (A) and the monomer UV It can be seen that the same effect can be obtained with any of the curable resins (B).
- Example 39 and Example 40 in which the addition amount of the reactive silicone component is different are compared, the adhesion evaluation results in Table 11 are both “ ⁇ ”, but the nail is raised after the cross-cut test.
- Example 40 having a larger amount of the reactive silicone component tended to peel more easily than Example 39 having a smaller amount of the reactive silicone component added. Since excessive addition of the reactive silicone component tends to reduce the adhesion of the decorative layer of the hydraulic transfer product, it is better to avoid the addition, and the addition amount is 15 parts by weight with respect to 100 parts by weight of the ultraviolet curable resin composition.
- Example 41 and 42 are compared with Examples 2 and 34, respectively, the resin beads are used as the second liquid, the coating agent is stored in a two-liquid state, and the first liquid and the second liquid are mixed during use.
- the coating agent is prepared (Examples 41 and 42)
- the same effects as those in the case where the two-part liquid is not formed (Examples 2 and 34) are obtained.
- the coating agents of Examples 2 and 34 and the two-component first liquid and second liquid were each stored in a sealed container for 6 weeks at 50 ° C. and then used.
- the coating agent of the present invention has an ultraviolet curable resin composition as a main component, is applied to a printing pattern of a transfer film to activate it, and penetrates the entire printing pattern to form a chemical and mechanical surface protection function on the generated decorative layer.
- the photopolymerizable monomer of the ultraviolet curable resin composition has one or more functional groups and a volume shrinkage of 20% or less
- the photopolymerizable oligomer has 10 or less functional groups.
- the coating agent includes polyurethane beads having an average particle diameter of 5 to 50 ⁇ m, and the ultraviolet curable resin composition and the polyurethane beads are blended in an amount of 100 parts by weight to 15 to 100 parts by weight.
- the surface roughness obtained by the average particle size of the photopolymerizable monomer and the appropriate volume shrinkage of the photopolymerizable monomer can be used without applying a top coat and making the transfer film a multilayer structure. , Such as feel of wet feeling and flexible feeling the decorative layer can impart, it has utility in the high industry.
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Abstract
Description
(1)水圧転写品にこのような触感を付与する塗料を含むトップコートを塗布する方法。
(2)転写フィルムの印刷パターンの下にウェット感や柔軟感のある触感付与層を付加する方法。
本出願人は、精意研究の結果、紫外線硬化樹脂組成物塗布剤の活性化成分の硬化後の体積収縮率(以下 単に「体積収縮率」と称する)を特定し、それに特定の割合で特定の樹脂ビーズを配合すると、装飾層に柔軟感とウェット感とが任意に複合された触感を発生するメカニズムを付与することができることを見出し、本発明の基本原理は、このような特定の紫外線硬化樹脂組成物塗布剤を使用して水圧転写することによって自己表面保護機能を有する装飾層に柔軟感とウェット感とを良好に付与することにあり、本発明の以下の第1乃至第3の課題解決手段は、この原理に基づいて提供される。
本発明の塗布剤60の主成分である紫外線硬化樹脂組成物62は、紫外線の化学的作用によって比較的短時間に硬化させることができる樹脂であり、特許文献1乃至4に既に記載されているように、用途に応じて、紫外線硬化型塗料、紫外線硬化型インク、紫外線硬化型接着剤等の形態を採り、基本的には、(1)光重合性モノマーを少なくとも有する光重合性成分と(2)光重合開始剤とを含むが、光重合性成分は、光重合性モノマーのほかに、光重合性オリゴマー(プレポリマー)を含むことができ、紫外線照射により硬化する前の液体状態のものであることでは、従来のそれらと同様であるが、本発明の塗布剤は、この紫外線硬化樹脂組成物に所定の樹脂ビーズ62B(図3参照)を添加して形成されていることに特徴がある。なお、この塗布剤は、所定の粘度とインク溶解度を有することが必要であることはもちろんである。
本発明に用いられる水圧転写フィルム用塗布剤は、紫外線硬化樹脂組成物を主成分とし、紫外線硬化樹脂組成物は、光重合性モノマーを少なくとも有する光重合性成分と光重合開始剤とを含み、光重合性モノマーは、3以下の官能基と20%以下の体積収縮率を有し、且つ塗布剤は、5~50μmの平均粒径を有する樹脂ビーズを含み、この樹脂ビーズは、紫外線硬化樹脂組成物100重量部に対して15~100重量部で配合されている。また、光重合性成分は、10以下の官能基を有する光重合性オリゴマーを含むことがより好ましい。なお、紫外線硬化樹脂組成物の光重合性成分は、0~65重量%の光重合性オリゴマーと30~95重量%の光重合性モノマーとすることができ、また光重合開始剤は、5~10重量%の割合で配合することができる。光重合性オリゴマーとしては、アクリル系オリゴマー、ポリエステル系オリゴマー、エポキシアクリレート系オリゴマー、ウレタンアクリレート系オリゴマー等の何れかを単独又は任意に組み合わせを用いることができる。光重合性オリゴマーの体積収縮率は、光重合性モノマーの体積収縮率と同様に20%以下とすることが好ましい。その理由は、この光重合性オリゴマーの体積収縮率が20%を越えると、紫外線硬化後の樹脂組成物が硬くなりすぎて柔軟感が低下するからである。
体積収縮率(%)=[1-(σs/σL)]×100
から求められる。なお、σsは、波長365nmのUV光源を用いて、積算光量1558mJ/cm2、 ピーク強度302mW/cm2で硬化させて得られたものである。
光重合性モノマーの具体例を述べると、例えば、2官能モノマーとしては、1.6ヘキサンジオールジアクリレート、シクロヘキシルアクリレート、ジプロピレングリコールジアクリレートがある。
塗布剤に添加される樹脂ビーズ62Bの平均粒径を5~50μmとしたのは、粒径が5μm未満であると、装飾層に触れたときに指紋の溝の底に樹脂ビーズが接触しないため触感不足が発生し、また粒径が50μmを越えると、装飾層の表面が疎の状態にあり、過度な外観不良を生じるからである。なお、樹脂ビーズの粒径は、JIS Z8825-1のレーザー回折法に準拠してレーザー回折式粒度分布測定装置によって測定して平均化した値(中位径:D50)である。また、この樹脂ビーズの好ましい添加量は、紫外線硬化樹脂組成物100重量部に対して15-100重量部であるが、その理由は、本発明の実施例と比較例とを対比しながら詳細に述べる
本発明の塗布剤は、平均粒径が0.005~10μmの微粒子シリカを添加することができる。この微粒子シリカの配合割合は、樹脂ビーズ100重量部に対して0.5~10重量部に設定されるのが好ましい。この微粒子シリカは、艶消し剤として機能するが、更に塗布剤にチキソトロピック性を付与することができる。この微粒子シリカのチキソトロピック性は、塗布剤中で複数の樹脂ビーズを塊状に集合して形成されたビーズ群(ビーズランプとも称する)の形態で装飾層と被転写物との間に配置して、樹脂ビーズの添加量を増やすことなく微細凹凸を形成することができ、紫外線硬化樹脂組成物による柔軟感とウェット感とが複合された触感を付加的に増進することができる。
紫外線硬化樹脂組成物と樹脂ビーズのガラス転移温度Tgは、装飾層の柔軟感を調整する要素となるが、印刷パターンを水圧転写する際の印刷パターンの転写性を損なわないように、設定される。紫外線硬化樹脂組成物のガラス転移温度Tgは、光重合性成分のガラス転移点Tgによって調整されるが、光重合性オリゴマーを含ませてこの光重合性オリゴマーのガラス転移温度によって調整するのが好ましく、この光重合性オリゴマーのガラス転移温度は、40℃以下に設定され、また樹脂ビーズのガラス転移温度は、-50~100℃に設定されるのが好ましい。なお、これらのガラス設定温度の値は、JIS K7121に準拠したDSC法による値である。ただし、DSC法で明確なガラス転移が観測されない場合には、JIS K7121に準拠したTMA法の値とする。
本発明において、硬化後の紫外線硬化樹脂組成物に柔軟性を付与するために、紫外線硬化樹脂組成物に可塑剤を添加することによって装飾層の柔軟感を補足することができる。この可塑剤は、水圧転写物品の装飾層に求められる基本的な物性を著しく損なうことなく柔軟性を付与することができるものであれば、特に限定されないが、ジブチルフタレート(DBP)などのフタル系や、マレイン酸系、リン酸系、アジピン酸系など公知のものを使用することができる。可塑剤の添加量は、装飾層の基本物性と柔軟性のバランスに応じて適宜調整される。
本発明において、硬化後の紫外線硬化樹脂組成物に付与される柔軟性を補足するために、反応性シリコーン系成分を添加することができる。反応性シリコーン成分は、未硬化の紫外線硬化樹脂組成物よりも比重が小さいため、塗布剤の塗布、印刷パターンの転写後に装飾層の表面に移行し、硬化後の装飾層の表面に紫外線硬化樹脂組成物と反応性シリコーン成分との反応層が形成されるため、一層柔軟感のある感触を得ることができる。このように柔軟性を補足するのに好ましい反応性シリコーン成分の具体例としては、両末端に有機官能基を有したシリコーン成分があるが、両末端に有機官能基を有したシリコーンオイルが一層好ましい。両末端に有機反応基を有するシリコーン成分を用いると、図4Aの符号81で示すように、シリコーン成分の両末端の官能基と紫外線硬化樹脂組成物とが反応して、硬化後の装飾層の表面付近に、両末端が装飾層と結合したアーチ状のシリコーン分子鎖80が形成され、図4Bに示すように、指Fが装飾層44に触れたときに、このアーチ状のシリコーン分子鎖80の撓みと復元とによるスプリング作用が装飾層44に付与されて、装飾層44に柔軟感のある感触を生じるものと考えられる。両末端の官能基は、紫外線硬化樹脂組成物と反応性を有し、本発明の効果を阻害しないものであれば、特定のものに限定されないが、例えば、紫外線硬化樹脂組成物がアクリレート系である場合には、アクリレート系の官能基を有するシリコーン成分を用いるのが好ましい。
また、装飾層の表面に前記シリコーン成分と紫外線硬化樹脂組成物との反応層が形成されると、表面の摩擦係数が小さくなってスリップ性が付与されるため、装飾層の耐摩擦性が向上する効果がある。この場合、ジメチル基が多く直が長い構成のシリコーン成分を用いるのが効果上一層有利である。更に、この反応層は、装飾層の表面にシリコーンの濡れ性を付与するため、防汚性や耐汗性の効果が付加的に発生する。なお、反応性シリコーン成分は、その直鎖に他の物性を付加できる官能基を有したものであってもよい。例えば光重合性成分(光重合性モノマー又は光重合性オリゴマーと光重合性モノマーの両方)がアクリル系である場合に、直鎖にメタクリル基を有するメタクリル変性シリコーンオイルを用いると、メタクリル変性シリコーンオイルと光重合性成分との架橋反応が進むため、装飾層の耐熱性や耐光性を向上することができる。
反応性シリコーン成分の添加量は、上記効果が得られる範囲で適宜設定することができるが、添加量が多すぎると、装飾層と物品(被転写体)との密着性が低下するので好ましくなく、その好ましい添加量は、具体的には、紫外線硬化樹脂組成物に対して0.1~15重量部の範囲である。
上記の通り、紫外線構成樹脂組成物の成分と樹脂ビーズとの協働によって柔軟感とウェット感のバランスを適宜調整した触感を装飾層に付与することができるが、例えば、大きな柔軟感を求める場合には、紫外線硬化性樹脂組成物の硬化物及び/又は樹脂ビーズの両方が柔軟になるように構成することができ、また大きなウェット感を求める場合には、樹脂ビーズの大きさと添加量を本発明の上記の特定の範囲内で調整して指紋溝にフィットし易い微細な凹凸を形成することができる。本発明の塗布剤は、塗膜の密着性を損なうことなく、柔軟感とウェット感とが複合された触感を装飾層に付与することができるので、紫外線硬化樹脂浸透による自己表面保護機能を有してトップコートを必要とすることがない装飾層に柔軟感とウェット感とを任意に組み合わせた触感を付与することができる。
装飾層が擦られた際に樹脂ビーズが脱落するのを防止するために、即ち、装飾層の耐擦過性を向上するために、樹脂ビーズは、表面に水酸基(OH基)結合の末端を有するものとし、且つ紫外線硬化樹脂組成物にイソシアネート基を有する成分を添加する形態とすることが好ましい。この理由は、次のように推察される。即ち、樹脂ビーズ表面の水酸基は、イソシアネート基(NCO基)を有する成分のイソシアネート基と反応してウレタン結合して樹脂ビーズに連結した分子鎖を形成するので、この分子鎖が光重合性成分の架橋構造に絡むことによって、装飾層に樹脂ビーズが一層強固に固定される。イソシアネート基を有する成分は、光重合性のないイソシアネートであってもよいし、イソシアネート変性した光重合性成分であってもよい。後者の場合には、紫外線硬化樹脂成分と樹脂ビーズがウレタン結合により化学的に結合する。イソシアネート基を有する成分との協働に関連して、樹脂ビーズの水酸基の数が多いほど、樹脂ビーズの脱落防止効果が大きくなるので、装飾層の形成や物性を阻害しない範囲で適宜の大きな水酸基数に調整することができる。イソシアネートの添加量は、表面に水酸基(OH基)数に応じて適宜設定されるが、水酸基数に対するイソシアネート基数の比は、概ね1以上が好ましく、特に、1.5倍以上となるように設定することが一層好ましい。
更に、紫外線硬化樹脂組成物には、上記のイソシアネート基を有する成分のほかに、ポリオールを添加してもよい。ポリオールは、イソシアネート基とウレタン反応するため、ポリオールが連結して樹脂ビーズに一層長い分子鎖を形成するので、この分子鎖が光重合性成分の架橋構造により絡みやすくなって、樹脂ビーズの脱落防止効果を一層向上することができる。また、ポリオールは、水酸基の数が多いほど(官能数が多いほど)、イソシアネート成分との反応点を増加して分子鎖が光重合性成分の架橋構造に一層複雑に絡みやすくなり、樹脂ビーズの脱落防止効果がさらに向上するとともに、装飾層の機械物性の向上にも効果的である。更に、ポリオールが分岐型ポリオールであると、一層複雑な架橋構造を形成することができるので、樹脂ビーズの脱落防止効果と装飾層の機械的物性の向上に特に効果的であり、その分岐数(側鎖の数)が多いほど(分岐数が増えるほど水酸基数も多くなる)その効果が大きくなる。即ち、ポリオールが分岐型であって例えば10官能(水酸基数が10)以上と官能数が多いと、両者の相乗効果で、脱落防止の効果が一層顕著となる。なお、この場合、イソシアネート添加量は、樹脂ビーズの水酸基数とポリオールの水酸基数の和に対するイソシアネート基数の比率が1以上となるように設定することが好ましい。
また、上記の第1の防止策とは異なって、紫外線硬化樹脂の光重合性成分の一部に水酸基を導入し、紫外線硬化樹脂組成物に添加されるイソシアネート基を有する成分を仲介して樹脂ビーズと光重合性成分をウレタン結合によって連結する構造としてもよい。このウレタン反応は、紫外線硬化後の加熱によって行ってもよいし、紫外線照射時に発生する熱を利用するか、紫外線照射と同時に加熱して、紫外線硬化と同時に反応させてもよい。
第1乃至第3の防止策におけるイソシアネート及び第2の防止策におけるポリオールの成分は、樹脂ビーズの脱落防止効果が得られれば、特に限定されないが、イソシアネートは、ビューレット反応型が特に脱落防止効果に優れるので好ましく、またポリオールは、ポリカーボネート系が耐加水分解性の観点から好ましい。
塗布剤の具体的な配合成分と配合割合は、以下の通りであるが、添加剤A~Cは、単独または組み合わせて使用する。
(I)紫外線硬化性樹脂組成物 100重量部
(内訳)
紫外線硬化性樹脂組成物は次の成分(1)~(3)を以下の割合で含んでいる。
(1)光重合性オリゴマー 0~65重量%
(2)光重合性モノマー 30~95重量%
(3)光重合開始剤 5~10重量%
なお、この紫外線硬化樹脂組成物は、下記の(4)~(6)の添加物を含んでいてもよいが、これらの添加物の量の配合割合は、(1)~(3)の合計(100重量%)に対する割合である。従って、添加物を含む紫外線硬化樹脂組成物全体の重量%は、100重量%を越えることになる。
(4)非反応性樹脂 2~12重量%
(5)耐光性付与剤
UV-A 0.5~8重量%
HALS 1.5~3.5重量%
(6)レベリング剤 0.01~0.5重量%
(7)溶剤 5~50重量%
(II)樹脂ビーズ 15~100重量部
(III)添加物A(耐摩耗性改良剤)
樹脂ビーズが水酸基付与されて表面変性されている場合
(8)イソシアネート基を有する成分
樹脂ビーズ表面の水酸基数に対するイソシアネート基数の比が1以上となる配合量
(9)ポリオール
装飾層の膜物性を損なわない範囲の添加量
(IV)添加物B(樹脂ビーズ集合剤)
(10)微粒子シリカ 樹脂ビーズ100重量部に対して12.5~37.5重量部
(V)添加物C(柔軟性補強剤兼耐摩耗性改良剤)
(11)両末端反応性シリコーン成分
(I)の紫外線硬化樹脂組成物に対して0.1~15重量部
本発明の塗布剤は、塗布剤を塗工し易い粘度に調整する目的と添加物である非反応性樹脂を分散させる目的で溶剤を含んでいてもよい。この塗布剤に含まれる「溶剤」は、塗布剤の主成分である紫外線硬化樹脂組成物の光重合性モノマーによる印刷パターンの活性化を阻害することがない特性(印刷パターンに対する溶解力)と添加量とで使用されるべきであることを理解すべきである。溶剤系塗布剤(活性剤)と紫外線硬化樹脂組成物の非溶剤性活性化成分との根本的な相違は、前者の活性剤では塗布後に溶剤成分が揮発するため、インクの付着性の再現による可塑状態が経時的に変化するが、後者の塗布剤(本発明で用いられる活性剤成分)では揮発することがない光重合性モノマー成分でインクの付着性を再現するので、インクの可塑状態が変化することがないことである。本発明の活性剤は、その光重合性モノマーの配合量が特定の範囲であれば、上記の条件を満たす範囲で溶剤が共存していてもインクの可塑状態を損なうことがない。このような目的の溶剤の好ましい添加量は、紫外線硬化製樹脂組成物のうち、光重合性オリゴマーと光重合性モノマーと光重合開始剤との合計に対して、5重量%~50重量%である。
本発明において、本発明の塗布剤中に添加するのと同じ成分の樹脂ビーズを含むインクから形成した印刷パターンを有する転写フィルムを用いてもよく、このような転写フィルムを用いると、塗布剤による触感付与効果を補足的に向上させることができる。この場合、塗布剤中の樹脂ビーズの添加量を減量すると、塗布剤の粘度を低く調整することができるので、塗布剤の塗工性を向上することができ、また転写フィルム側にも樹脂ビーズが添加されているので、塗布剤の塗布量を少なくしても触感を低下させることはない。
本発明の塗布剤において、装飾層に柔軟な感触を付与するために添加される樹脂ビーズは、従来の艶消し用に添加される樹脂ビーズと異なり、ガラス転移温度Tgが低く、吸油性が高く、艶消し剤として使用する場合に比べて添加量が多いため、塗布剤を高温雰囲気の如き劣悪環境下で貯蔵すると、塗布剤が増粘、固化することが懸念される場合には、樹脂ビーズを第1液から分離して第2液に添加して貯蔵するとこのような懸念が解消されるのが好ましい。この貯蔵形態とすると、使用時に樹脂ビーズの添加量を調整することができるので、塗布剤による所望の触感付与効果に調整することができる付加的な効果がある。
このような貯蔵及び使用形態では、樹脂ビーズを含む第2液は、第1液への混合操作における分散性や作業性を容易とするために、反応性の低い溶剤に分散させてペースト状もしくは液状としておくが、分散性を高めるために公知の分散剤を添加してもよい。反応性の低い溶剤としては、長鎖炭化水素系の混合溶剤やミネラルスピリットの如き塗料用の溶剤等を用いることができるが、この溶剤は、塗布剤の主成分である紫外線硬化樹脂組成物の光重合性モノマーによる印刷パターンの活性化を阻害することがない特性(印刷パターンに対する溶解力)と添加量の範囲で適宜選択して調整することが必要である。また、樹脂ビーズが種類や性状が異なる複数の樹脂ビーズの組み合わせである場合には、第2液にこれらの複数の樹脂ビーズを混合してもよいし、各樹脂ビーズ毎にペースト状もしくは液状に分けた複数の第2液(例えば第2A液、第2B液など)としてもよい。複数の第2液とした場合には、これらを混合して使用する際に、異なる樹脂ビーズが分散された複数の第2液の混合割合を調整すると、活性剤中の樹脂ビーズの粒度分布やガラス転移温度の如き構成を適宜に設定することができるので、塗布剤による触感の程度を一層細かく調整することができる。なお、貯蔵時の不具合が生じない範囲で、第2液に配合されるべき樹脂ビーズと同一の樹脂ビーズ、もしくは第2液に分散されるべき樹脂ビーズと形状、性状、材質の少なくともいずれかが異なる樹脂ビーズを第1液に配合しておいてもよい。なお、本発明の塗布剤に非反応性樹脂が添加される場合には、非反応性樹脂は、温度が高くなると、紫外線硬化樹脂組成物の熱重合を誘発することがあるため、2液化の形態とする場合には、非反応性樹脂は第2液に配合しておくことが好ましい。
(i)転写フィルム
本出願人である株式会社タイカが水圧転写技術のライセンス先に「ムーンマカサー×ピケ」(MOON MACASSER × PIQUE)と称する商品名で販売している木目パターンの転写フィルムを用いた。
(ii)塗布剤の塗工
塗布剤は、(i)の転写フィルムに10μmの厚みにミヤバー法で塗布した。
(iii)被転写体
被転写体である物品としては、10cm×20cm×3mmのABS樹脂製の平板(ユーエムジー・エービーエス株式会社製 TM20)が用いられ、この物品に、図2に示す工程順で水圧転写した。
(1)塗工性
転写フィルムを転写槽内に導入する直前に、各活性剤をミヤバー塗布方法によって転写フィルムの印刷パターン上に約20μmの厚みで塗布したときに、塗布作業性(塗布し易さ)が良好な場合を「○」、塗布作業性は劣るが実用の範囲で塗工可能な場合を「△」、転写フィルムへの塗布が困難な場合を「×」とした。
(2)柔軟感
本発明の実施例の塗布剤に代えて、大橋化学工業株式会社製の商品名「ユービックSクリアーHE」と称する無溶剤型の紫外線硬化樹脂組成物から成る塗布剤(従来技術による塗布剤)を用いて実施例と同様の転写フィルムと加工条件で被転写体に水圧転写して形成されて柔軟感が付与されていない装飾層を有する水圧転写品(ブランク品)を0ポイントとし、また市販の柔軟感付与塗料(ハニー化成社製 製品名「ハニソフト」)を実施例の被転写体と同じ物体の表面に25μm塗布し、乾燥して物体の表面に直接柔軟層を形成した物品を10ポイントとして、被験者10名が各試料(実施例及び比較例による水圧転写品、以下同じ)に触れたときに各被験者が感じる柔軟感をポイント数で表現してもらい、10人の平均点(小数点以下切捨て)が、6~10ポイントを「◎」、5~3ポイントを「○」 、2~1ポイントを「△」、0ポイントを「×」として評価した。
(3)ウェット感
同じく、本発明の実施例の塗布剤に代えて、大橋化学工業株式会社製の商品名「ユービックSクリアーHE」と称する無溶剤型の紫外線硬化樹脂組成物から成る塗布剤(従来技術による塗布剤)を用いて実施例と同様の転写フィルムと加工条件で被転写体に水圧転写して形成された、装飾層にウェット感が付与されていない水圧転写品(ブランク品)を0ポイントとし、市販のウェット感付与塗料(大橋化学工業社製 製品名「ラビフレックス」)を実施例の被転写体と同じ物体の表面に25μm塗布し、乾燥して物体の表面に直接ウェット層を形成した物品を10ポイントとして、被験者10名が各試料に触れたときに各被験者が感じるウェット感をポイント数で表現してもらい、10人の平均点(小数点以下切捨て)が、6~10ポイントを「◎」、5~3ポイントを「○」 、2~1ポイントを「△」、0ポイントを「×」と評価した。
(4)耐摩耗性
テスター産業株式会社製のテーバー磨耗試験機を用いて磨耗輪CS-10、荷重4.9N、回転数60rpmの条件でテーバー磨耗試験を行い、100回目の回転終了時と200回目の回転終了時の各試料の表面を顕微鏡(200倍)で観察し、200回目の回転終了時でもビーズの脱落がない場合を◎、200回目の回転終了時に樹脂ビーズの脱落が生じるが、100回目の回転終了時には樹脂ビーズの脱落がない場合を「○」、100回目の回転終了時に樹脂ビーズの脱落が発生した場合を「×」と評価した。
(5)密着性
実施例及び比較例のそれぞれの水圧転写品(試料)ついて、セロテープ(登録商標)(ニチバン製)を用いて、試料毎にクロスカット試験(旧JIS K5400-8.5準拠)で剥離状態を観察して密着性をそれぞれ評価した。いずれの水圧転写品でも装飾層(印刷パターンが転写されたもの)の剥がれ全くない場合を「○」、装飾層の剥がれがある場合を「×」とした。
(1)実施例1~3、14と比較例5、6の評価から、本発明の樹脂ビーズの粒径の範囲で良好な柔軟感とウェット感が得られることが解る。
(2)実施例17を除く実施例1~16、18~36と実施例17の評価の比較、特に実施例17と同じ成分を用いた実施例2~5及び15、16と実施例17の評価の比較から、樹脂ビーズのガラス転移温度が-50~100℃の範囲内で好ましい柔軟感付与の効果が得られ、特に実施例2、4、5の評価と実施例16,17の評価の比較から、ガラス転移温度-50~50℃の範囲のポリウレタンビーズを用いると、一層好ましい柔軟感とウェット感が得られたことが解る。なお、表8において、実施例15と実施例17の塗工性評価結果がともに「×」となっているが、この評価の際に、実施例15に比べて実施例17の方が著しく塗工性が悪かったことが確認されている。これは、実施例17のように、樹脂ビーズのガラス転移温度が-50℃未満であると、硬化前の紫外線硬化樹脂組成物塗布剤中の樹脂ビーズの吸油性が大きいことに起因して、紫外線硬化樹脂組成物塗布剤の粘度が上昇したためである。
(3)実施例9を除く他の実施例1~8,10~33と実施例9の評価の比較から、特に実施例7と実施例9の評価の比較から、オリゴマーのガラス転移温度が40℃以下であると、柔軟感付与が特に効果的に得られることが解る。
(4)実施例9,10以外の実施例と実施例9,10の評価の対比から、オリゴマーの官能基数が低いほど柔軟感が良好であることが解るが、実施例9,10から解るように、オリゴマーの官能基数が10以下であれば、柔軟感にやや低下があっても実用上支障がない。
(5)実施例2、11と比較例1の評価から、モノマーの官能基数は3以下で好ましい触感(柔軟感やウェット感)が得られることが解る。
(6)実施例1~33と比較例2の評価の比較から、特に、実施例12と比較例2の評価の比較から、モノマーの体積収縮率は20%以下が好ましいことが解るが、実施例13からこの体積収縮率は、小さいほうが好ましく、0%が理想値であることが解る。
(7)実施例1~39の評価と比較例3、4の評価とを対比すると、樹脂ビーズの添加量は、紫外線硬化樹脂組成物100重量部に対して15~100重量部であるのが好ましいことが解る。
(8)実施例1~19と実施例20~22の評価を対比すると、表面にOH基を有する樹脂ビーズとイソシアネートとを組み合わせることによって、樹脂ビーズの脱落が効果的に防止されて、耐摩耗性が向上することが解る。
(9)実施例23のように、ポリオールを付加的に添加しても、実施例20~22と同様に、耐摩耗性を効果的に向上させることができたことが解る。また、実施例23のポリオールに代えて、6官能の分岐型ポリオールを添加した実施例43と、16官能の分岐型ポリオールを添加した実施例44は、いずれも摩耗性評価が、実施例23と同様に「◎」評価であることから分岐型ポリオールでも耐摩耗性の向上に有効であることが解る。また表9及び11には記載していないが、摩耗性試験の回数を400回にすると、実施例23と43ではビーズの脱落が観察されたが、実施例44ではビーズの脱落が見られなかったことから、分岐型ポリオールでも分岐数および官能基数(水酸基数)が多いほうが耐摩耗性に対して効果的であることが解る。
(10)実施例18の成分をベースにしてこれに微粒子シリカを添加すると、樹脂ビーズの添加量を低減しても優れた柔軟感とウェット感が得られたことが解る(実施例18、実施例24~32の対比参照)。
(11)実施例26と実施例27とを対比すると、微粒子シリカの粒径が10μmを越えると、柔軟感、ウェット感ともに減少して好ましくなく、一方、実施例24の評価から、微粒子シリカの粒径は、現存する0.007μmでも好ましい触感を維持しつつ実用上支障ない塗工性が得られることが解り、これから微粒子シリカの粒径は、0.005μmが下限値であり、それ未満は塗工性の実用上に支障があると推察される。実施例24~30と実施例31、32との柔軟感とウェット感の評価から微粒子シリカの好ましい添加量が樹脂ビーズ100重量部に対して12.5~37.5重量部であることが解る。
(12)実施例25と実施例33の対比から、実施例33のように、OH処理されたイソシアネートが用いられると、微粒子シリカ添加系においても水酸基処理された樹脂ビーズとイソシアネートとの組合せによる耐摩耗性効果が得られることが解る。
(13)実施例2、23、33と、実施例34、35、36とを対比すると、他の成分が同じとすると、オリゴマー/モノマー系の紫外線硬化樹脂組成物(A)とモノマー系の紫外線硬化性樹脂(B)のいずれであっても同様の効果が得られることが解る。
(14)比較例において、光重合性モノマーの官能基数が3を越えたり(比較例1)、その体積収縮率が20%を越えたり(比較例2)、樹脂ビーズの配合量が樹脂組成物100重量部に対して15重量部未満であったり(比較例3)、100重量部を越えたり(比較例4)すると、いずれかの評価が悪く、これらの比較例は、本発明の実施例が期待する評価が得られない。
(15)実施例2と実施例37~39とを比較すると、他の成分を同じとして実施例37~39のように反応性シリコーン成分を添加すると、表面のスリップ性が向上し、耐摩耗性の向上が見られたことが解る。また、これらの実施例の柔軟感やウェット感の評価結果は同じであるが、実施例37~39の方が一層よい柔軟感やウェット感が感じられた。
(16)反応性シリコーン成分の添加量が異なる実施例39と実施例40とを比較すると、表11の密着性の評価結果はともに「○」であるが、クロスカット試験後に、爪を立てて装飾層を剥そうとした場合に、反応性シリコーン成分の添加量がより多い実施例40が反応性シリコーン成分の添加量が少ない実施例39に比べて剥れ易い傾向があった。反応性シリコーン成分の過剰な添加は水圧転写品の装飾層の密着性を低下する傾向があるので、避けた方がよく、その添加量は、紫外線硬化性樹脂組成物100重量部に対して15重量部以下とすることがより好ましいことが解る。
(17)実施例41、42と実施例2、34とをそれぞれ比較すると、樹脂ビーズを第2液として塗布剤を二液化状態で貯蔵し、使用時に第1液と第2液とを混合して塗布剤を調合しても(実施例41,42)、二液化しない場合(実施例2、34)と同じ作用効果が得られることが解る。また、表11には記載していないが、実施例2、34の塗布剤と、二液化した第1液及び第2液をそれぞれ密閉容器内で50℃において6週間放置して保管した後使用時に混合調整した実施例41,42の塗布剤を転写フィルムにそれぞれ塗工した際の塗工性を比較したところ、二液化しない実施例2、34の塗布剤は、二液化して貯蔵した実施例41、42の塗布剤に比べて若干の粘性の増加が見られたことから、二液化の貯蔵形態は、塗布剤の安定した特性を維持することができる点で有効であることが解る。
12 加飾物品
20 転写フィルム
30 水溶性フィルム(キャリアフィルム)
40 印刷パターン
44 装飾層
46 紫外線硬化性樹脂組成物混在印刷パターン(一体化層)
50 水
60 塗布剤(活性剤)
62 紫外線硬化樹脂組成物
62B 樹脂ビーズ
70 紫外線
72 シャワー
74 熱風
80 シリコーン成分分子鎖
81 シリコーン分子反応部
F 指
Claims (20)
- 水溶性フィルム上に乾燥された印刷パターンを有する水圧転写フィルムの前記印刷パターン上に光重合性モノマーを少なくとも有する光重合性成分と光重合開始剤とを含む紫外線硬化樹脂組成物塗布剤を塗布し、前記紫外線硬化樹脂組成物の活性化成分により前記印刷パターンの付着性を回復し、前記印刷パターンを物品の表面に水圧転写して前記物品の表面に装飾層を形成し、且つ前記紫外線硬化樹脂組成物塗布剤を前記印刷パターン全体に浸透して前記印刷パターンと前記紫外線硬化樹脂組成物とが混在する一体化層として前記装飾層が前記一体化層によって形成されるようにし、前記装飾層の紫外線硬化によって装飾層自体に化学的、機械的な表面保護機能を付与するようにした水圧転写方法であって、前記塗布剤である紫外線硬化樹脂組成物の前記光重合性モノマーは、3以下の官能基と20%以下の体積収縮率を有し、且つ前記塗布剤は、5~50μmの平均粒径を有する樹脂ビーズを含み、前記紫外線硬化樹脂組成物と前記樹脂ビーズとは、100重量部対15~100重量部で配合ざれていることを特徴とする水圧転写方法。
- 請求項1に記載の水圧転写方法であって、前記光重合性成分は、10以下の官能基を有する光重合性オリゴマーを含んでいることを特徴とする水圧転写方法。
- 請求項2に記載の水圧転写方法であって、前記光重合性オリゴマーは、40℃以下のガラス転移温度Tgを有することを特徴とする水圧転写方法。
- 請求項1乃至3のいずれかに記載の水圧転写方法であって、前記樹脂ビーズは、-50~100℃のガラス転移温度(JIS K7121に準拠して測定)を有することを特徴とする水圧転写方法。
- 請求項1乃至3のいずれかに記載の水圧転写方法であって、前記樹脂ビーズは、その表面に水酸基(OH基)結合の末端を有しており、且つ前記紫外線硬化樹脂組成物はイソシアネート基を有する成分を含むことを特徴とする水圧転写方法。
- 請求項1乃至5のいずれかに記載の水圧転写方法であって、前記塗布剤は、更に、0.005~10μmの平均粒子の微粒子シリカを含み、前記微粒子シリカは、樹脂ビーズ100重量部に対して12.5~37.5重量部の配合割合で配合されていることを特徴とする水圧転写方法。
- 請求項1乃至6のいずれかに記載の水圧転写方法であって、前記樹脂ビーズは、ポリウレタンビーズであり、且つ-50~50℃のガラス転移温度(JIS K7121に準拠して測定)を有することを特徴とする水圧転写方法。
- 請求項1乃至7のいずれかに記載の水圧転写方法であって、前記塗布剤は、反応性シリコーン系成分を更に含むことを特徴とする水圧転写法。
- 請求項1乃至8のいずれかに記載の水圧転写方法であって、前記塗布剤は、ポリオールを更に含むことを特徴とする水圧転写方法。
- 水溶性フィルム上に乾燥された印刷パターンを有する水圧転写フィルムの前記印刷パターン上に光重合性モノマーを少なくとも有する光重合性成分と光重合開始剤とを含む紫外線硬化樹脂組成物塗布剤を塗布し、前記紫外線硬化樹脂組成物の活性化成分により前記印刷パターンの付着性を回復し、前記印刷パターンを物品の表面に水圧転写して前記物品の表面に装飾層を形成し、且つ前記紫外線硬化樹脂組成物塗布剤を前記印刷パターン全体に浸透して前記印刷パターンと前記紫外線硬化樹脂組成物とが混在する一体化層として前記装飾層が前記一体化層によって形成されるようにし、前記装飾層の紫外線硬化によって装飾層自体に化学的、機械的な表面保護機能を付与するようにした水圧転写方法に用いられる水圧転写フィルム用塗布剤であって、前記紫外線硬化樹脂組成物の前記光重合性モノマーは、3以下の官能基と20%以下の体積収縮率を有し、且つ前記塗布剤は、5~50μmの平均粒径を有する樹脂ビーズを含み、前記紫外線硬化樹脂組成物と前記樹脂ビーズとは、100重量部対15~100重量部で配合ざれていることを特徴とする水圧転写フィルム用塗布剤。
- 請求項10に記載の水圧転写フィルム用塗布剤であって、前記光重合性成分は、10以下の官能基を有する光重合性オリゴマーを含んでいることを特徴とする水圧転写フィルム用塗布剤。
- 請求項11に記載の水圧転写フィルム用塗布剤であって、前記光重合性オリゴマーは、40℃以下のガラス転移温度Tgを有することを特徴とする水圧転写フィルム用塗布剤。
- 請求項10乃至12のいずれかに記載の水圧転写フィルム用塗布剤であって、前記樹脂ビーズは、-50~100℃のガラス転移温度(JIS K7121に準拠して測定)を有し、前記光重合性オリゴマーは、40℃以下のガラス転移温度Tgを有することを特徴とする水圧転写フィルム用塗布剤。
- 請求項10乃至13のいずれかに記載の水圧転写フィルム用塗布剤であって、前記樹脂ビーズは、その表面に水酸基(OH基)結合の末端を有しており、且つ前記紫外線硬化樹脂組成物はイソシアネート基を有する成分を含むことを特徴とする水圧転写フィルム用塗布剤。
- 請求項10乃至14のいずれかに記載の水圧転写フィルム用塗布剤であって、前記塗布剤は、更に、0.005~10μmの平均粒子の微粒子シリカを含み、前記微粒子シリカは、樹脂ビーズ100重量部に対して12.5~37.5重量部の配合割合で配合されていることを特徴とする水圧転写フィルム用塗布剤。
- 請求項10乃至15のいずれかに記載の水圧転写フィルム用塗布剤であって、前記樹脂ビーズはポリウレタンビーズであり、かつ-50~50℃のガラス転移温度(JIS K7121に準拠して測定)を有することを特徴とする水圧転写フィルム用塗布剤。
- 請求項10乃至16のいずれかに記載の水圧転写フィルム用塗布剤であって、前記塗布剤は、反応性シリコーン系成分を更に含むことを特徴とする水圧転写フィルム用塗布剤。
- 請求項10乃至17のいずれかに記載の水圧転写フィルム用塗布剤であって、前記塗布剤は、ポリオールを更に含むことを特徴とする水圧転写フィルム用塗布剤。
- 請求項10乃至18のいずれかに記載の水圧転写フィルム用塗布剤であって、前記塗布剤は、光重合性成分(光重合性オリゴマーと光重合性モノマー)を含む第1液と非反応性樹脂を含む第2液との2液化の形態であり、その他の成分はいずれかの液に配合されていることを特徴とする水圧転写フィルム用塗布剤。
- 請求項1乃至9のいずれかに記載の水圧転写方法によって製造された装飾層を有することを特徴とする水圧転写品。
Priority Applications (9)
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EP12777687.0A EP2703183B1 (en) | 2011-04-27 | 2012-04-26 | Water pressure transfer method, coating agent for water pressure transfer film, and water pressure transfer article |
RU2013152640/12A RU2581991C2 (ru) | 2011-04-27 | 2012-04-26 | Способ переноса изображения под давлением воды, покровное вещество в пленке для переноса изображения под давлением воды и изделие с переносом изображения под давлением воды |
CN201280020248.3A CN103492193B (zh) | 2011-04-27 | 2012-04-26 | 水压转印方法、水压转印膜用涂布剂及水压转印品 |
KR20137028830A KR20140020992A (ko) | 2011-04-27 | 2012-04-26 | 수압전사방법, 수압전사필름용 도포제 및 수압전사품 |
AU2012248309A AU2012248309A1 (en) | 2011-04-27 | 2012-04-26 | Water pressure transfer method, coating agent for water pressure transfer film, and water pressure transfer article |
US14/113,925 US9068098B2 (en) | 2011-04-27 | 2012-04-26 | Water pressure transfer method, coating agent for water pressure transfer film, and water pressure transfer article |
MX2013012487A MX361696B (es) | 2011-04-27 | 2012-04-26 | Un método de transferencia por presión de agua, un agente de recubrimiento para película de transferencia por presión de agua y un artículo de transferencia por presión de agua. |
CA 2832983 CA2832983A1 (en) | 2011-04-27 | 2012-04-26 | A water pressure transfer method, a coating agent for water pressure transfer film and a water pressure transfer article |
JP2013512420A JP5302483B2 (ja) | 2011-04-27 | 2012-04-26 | 水圧転写方法、水圧転写フィルム用塗布剤及び水圧転写品 |
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JP (1) | JP5302483B2 (ja) |
KR (1) | KR20140020992A (ja) |
CN (1) | CN103492193B (ja) |
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JP2014122338A (ja) * | 2012-11-22 | 2014-07-03 | Nippon Synthetic Chem Ind Co Ltd:The | 活性エネルギー線硬化性樹脂組成物、コーティング剤組成物、及び積層体 |
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JP6161524B2 (ja) * | 2013-11-29 | 2017-07-12 | 関西ペイント株式会社 | 塗料組成物及び塗装物品 |
JP6188216B2 (ja) * | 2013-11-29 | 2017-08-30 | 関西ペイント株式会社 | 塗料組成物及び塗装物品 |
RU176926U1 (ru) * | 2017-07-16 | 2018-02-01 | Артем Владимирович Веселов | Имерсор |
CN115195334A (zh) * | 2022-07-05 | 2022-10-18 | 盛基家居用品开发(嘉善)有限公司 | 一种多类型拼接一体式装饰面的生产工艺 |
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- 2012-04-26 MY MYPI2013003777A patent/MY161166A/en unknown
- 2012-04-26 EP EP12777687.0A patent/EP2703183B1/en not_active Not-in-force
- 2012-04-26 WO PCT/JP2012/061168 patent/WO2012147829A1/ja active Application Filing
- 2012-04-26 CN CN201280020248.3A patent/CN103492193B/zh not_active Expired - Fee Related
- 2012-04-26 RU RU2013152640/12A patent/RU2581991C2/ru not_active IP Right Cessation
- 2012-04-26 KR KR20137028830A patent/KR20140020992A/ko not_active Application Discontinuation
- 2012-04-26 JP JP2013512420A patent/JP5302483B2/ja not_active Expired - Fee Related
- 2012-04-26 CA CA 2832983 patent/CA2832983A1/en not_active Abandoned
- 2012-04-26 TW TW101114909A patent/TW201313505A/zh unknown
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- 2012-04-26 US US14/113,925 patent/US9068098B2/en not_active Expired - Fee Related
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Also Published As
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TW201313505A (zh) | 2013-04-01 |
MY161166A (en) | 2017-04-14 |
EP2703183B1 (en) | 2015-05-27 |
MX2013012487A (es) | 2014-01-24 |
AU2012248309A1 (en) | 2013-12-05 |
JP5302483B2 (ja) | 2013-10-02 |
MX361696B (es) | 2018-12-14 |
JPWO2012147829A1 (ja) | 2014-07-28 |
RU2581991C2 (ru) | 2016-04-20 |
EP2703183A4 (en) | 2014-12-10 |
US9068098B2 (en) | 2015-06-30 |
CA2832983A1 (en) | 2012-11-01 |
EP2703183A1 (en) | 2014-03-05 |
US20140057085A1 (en) | 2014-02-27 |
CN103492193B (zh) | 2016-01-06 |
CN103492193A (zh) | 2014-01-01 |
RU2013152640A (ru) | 2015-06-10 |
KR20140020992A (ko) | 2014-02-19 |
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