WO2013094424A1 - 水圧転写用フィルム - Google Patents
水圧転写用フィルム Download PDFInfo
- Publication number
- WO2013094424A1 WO2013094424A1 PCT/JP2012/081639 JP2012081639W WO2013094424A1 WO 2013094424 A1 WO2013094424 A1 WO 2013094424A1 JP 2012081639 W JP2012081639 W JP 2012081639W WO 2013094424 A1 WO2013094424 A1 WO 2013094424A1
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- WO
- WIPO (PCT)
- Prior art keywords
- film
- hydraulic transfer
- base material
- receiving layer
- ink receiving
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
- B41M5/508—Supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/40—Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/12—Transfer pictures or the like, e.g. decalcomanias
Definitions
- the present invention relates to a hydraulic transfer film.
- a water pressure transfer method is known as means for forming a printed pattern on a surface of a molded body having a three-dimensional surface by unevenness by transfer printing.
- a transfer film having a printing layer constituting a pattern activated by an activator on a water-soluble or water-swellable film is floated on the water surface so that the printing surface is the upper surface.
- the object to be painted is pushed in from above, and the image of the printing layer is transferred to the outer peripheral surface of the object to be transferred using water pressure.
- the water pressure transfer is performed in a temperature range of 10 to 40 ° C.
- the printing layer is required to have accuracy such as photographs, and a method using on-demand printing represented by inkjet printing is becoming widespread. Unlike gravure printing, there is no need to produce a plate and it can be performed at low cost.
- a method that enables hydraulic transfer by using a polyvinyl alcohol-based resin for the printing layer is employed (Patent Document 1).
- Patent Document 2 a method using polysaccharides such as starch or inorganic substances as a filler is employed.
- the printed layer is made uneven by the filler, and as a result, the sharpness of the obtained printed image is impaired.
- Patent Document 3 employs a method of embossing or matting the base film for the purpose of improving handling (Patent Document 3). Although the machinability is improved, there is a problem that the fine unevenness of embossing or matting affects the surface of the printing layer, thereby reducing the accuracy of the printed image. Furthermore, these water pressure transfer films are also in contact with the water surface directly on the non-printing side, so that wrinkles are likely to occur, and in addition, water flows when the object is pushed into the water surface. As a result, it is difficult to reliably transfer the water pressure onto the surface of the object.
- the present invention is a multilayer film comprising at least two layers of a base material layer and an ink receiving layer, the surface of the ink receiving layer is smooth, a high-definition printed image is obtained, and there is no wrinkle on the surface after transfer
- An object of the present invention is to provide a hydraulic transfer film from which a transfer object can be obtained.
- a film for hydraulic transfer comprising at least two layers of an ink receiving layer made of polyvinyl alcohol and a base material layer, and having a surface roughness Ra of at least 0.14 ⁇ m or more in contact with at least the ink receiving layer of the base material layer.
- a film for hydraulic transfer wherein the film is less than 40 ⁇ m and has a gloss of 80 or more.
- the surface roughness Ra of the base material layer is 0.40 ⁇ m or less and the gloss is 80 or more, the surface roughness of the ink receiving layer formed on the upper surface of the base material layer is also suppressed. As a result, a high-definition printed image can be obtained.
- the polyvinyl alcohol solution obtained by solution casting reproducibly follows the unevenness on the cast surface side of the base material layer, and the polyvinyl alcohol solution itself has a certain degree of viscosity, so the unevenness of the base material layer surface is the air surface of the ink receiving layer. Reproduced in the roughness of the side.
- the surface of the ink receiving layer is also smooth.
- the surface of the ink receiving layer is also smooth.
- the image does not appear to deteriorate. If the surface of the base material layer is not smooth, the image appears to be deteriorated due to the irregular reflection of light on the surface of the ink receiving layer.
- the surface roughness Ra of the base material layer is 0.40 ⁇ m or less
- the gloss is 80 or more, more preferably Ra 0.20 ⁇ m or less
- the gloss is 88 or more. It becomes a film for water pressure transfer which becomes fine and can reduce wrinkles on the image of the transferred surface.
- the wetting tension of the surface of the base material layer is 30 to 46 mN / m, the polar groups of the base material layer and the ink receiving layer This is possible because of repulsion.
- the present invention is a film comprising at least two layers of an ink receiving layer and a base material layer, and the base material layer has at least one surface contacting the ink receiving layer as a surface. It has been found that the material has properties of roughness Ra 0.40 ⁇ m or less and gloss 80 or more. Further, the wetting tension of the base material layer is 30 to 46 mN / m, the ink receiving layer is made of polyvinyl alcohol having a polymerization degree of 1000 to 4000 and a saponification degree of 70 to 99 mol%, and is smooth and has a wetting tension of 30 to 46 mN / m.
- a high-definition printed image can be obtained if the substrate has a surface, and if the substrate layer is white, it can be confirmed whether a fine printed image can be easily obtained by printing. It has been found that it functions, and the present invention has been completed.
- the ink receiving layer in the invention is preferably water-soluble or water-swellable, and can be appropriately selected from film materials conventionally used as a hydraulic transfer film.
- a resin include polyvinyl alcohol resin, dextrin, gelatin, glue, casein, shellac, gum arabic, starch, protein, polyacrylic amide, sodium polyacrylate, polyvinyl methyl ether, methyl vinyl ether and anhydrous
- examples thereof include a copolymer with maleic acid, a copolymer of vinyl acetate and itaconic acid, polyvinylpyrrolidone, acetylcellulose, acetylbutylcellulose, carboxymethylcellulose, methylcellulose, hydroxyethylcellulose, sodium alginate and the like.
- polyvinyl alcohol is particularly preferred from the viewpoints of production stability, solubility in water and economy.
- the polyvinyl alcohol used may be unmodified PVA, or may be olefins such as ethylene and propylene, acrylic acid esters, methacrylic acid esters, maleic acid and salts or esters thereof, etc. in the main chain of PVA. It may be a modified PVA in which one type or two or more types of monomers are copolymerized.
- Polyvinyl alcohol is necessary when forming a printing layer for transfer on a base material layer by changing the polymerization degree, saponification degree, modified species, and the amount of other resins such as starch and rubber.
- the mechanical strength, moisture resistance during handling, the speed of softening by water absorption after floating on the water surface, the time required for spreading or spreading in water, the ease of deformation in the transfer process, etc. can be adjusted as appropriate. it can.
- the polymerization degree of polyvinyl alcohol is preferably 1000 to 4000. When the degree of polymerization is less than 1000, dissolution may be fast when performing hydraulic transfer, and sufficient throwing power may not be obtained, and the original function of hydraulic transfer may not be sufficiently exhibited. On the other hand, when the degree of polymerization exceeds 4000, the water solubility of the film is low, and an economical hydraulic transfer speed may not be obtained.
- the saponification degree of polyvinyl alcohol is 70 to 99 mol%, preferably 74 to 88 mol%.
- the thickness of the ink receiving layer is preferably 15 to 80 ⁇ m, more preferably 20 to 40 ⁇ m. If it is less than 15 ⁇ m, when the ink receiving layer is peeled off from the base material layer, the film is poor and the handling is hindered. On the other hand, if it is thicker than 80 ⁇ m, it takes time for the ink receiving layer to swell, resulting in a problem that the hydraulic transfer workability is lowered.
- the ink receiving layer may contain a plasticizer for the purpose of imparting film flexibility.
- the type of plasticizer to be used is not particularly limited, but may be a polyhydric alcohol plasticizer such as glycerin, diglycerin, triethylene glycol, diethylene glycol, or polyethylene glycol, or a saccharide such as sorbitol, glucose, or xylitol. . Of these, glycerin is preferred as the plasticizer.
- the addition amount of the plasticizer is preferably 0 to 30 parts by weight with respect to 100 parts by weight of polyvinyl alcohol. If the amount of the plasticizer added is more than 30 parts by weight, the plasticizer bleeds and sticks from the ink receiving layer, which is not preferable.
- a surfactant or the like may be used as appropriate for the purpose of improving the dispersibility of the filler, the anti-blocking agent, and these additives as long as the smoothness of the PVA film surface is not impaired for the purpose of preventing blocking between the hydraulic transfer films.
- Polyvinyl alcohol may be mixed with other water-soluble polymers other than the above, and examples thereof include gelatin, casein, gum arabic, polyvinylpyrrolidone, pullulan, methylcellulose, hypromellose, and ethylcellulose.
- the amount of the water-soluble polymer added is preferably 20 parts by weight or less with respect to 100 parts by weight of polyvinyl alcohol.
- the base material layer in the present invention is preferably made of a material having excellent dimensional stability due to environmental temperature and humidity changes, and is flexible in consideration that the hydraulic transfer film is handled during printing or cutting. It is necessary to have sex.
- the size and shape are not limited, but when the printing process on the ink receiving layer is continuously performed, a flexible film can be adopted in consideration of the transportability of the film.
- a resin film such as polyethylene, polypropylene, PET, polyvinyl chloride, and nylon, a metal foil, paper, and the like can be used.
- any white pigment or other pigment may be added to the base material layer, or the surface may be white.
- the layer which exhibits can be formed.
- a paper whose surface is coated with polypropylene can be used. If the Ra, which is an index of roughness, is a substrate larger than 0.40 ⁇ m, it is considered that the roughness is also caused on the side (air surface side) of the PVA film laminated thereon that is not in contact with the substrate. Unevenness is reproduced.
- the pattern derived from the roughness appears on the PVA film itself, or the gloss of the image obtained due to irregular reflection of light is reduced, so that it is not suitable to obtain a high-quality image, There is a problem that it cannot be transferred to a three-dimensional object with high image quality as it is.
- the roughness Ra is larger than 0.40 ⁇ m, the PVA film may appear cloudy due to the unevenness. In that case, in addition to obstructing the finish of the printed image, unevenness of the PVA film becomes uneven due to the unevenness, and especially the thin part dissolves first, so the printed image is wrinkled during the hydraulic transfer work. Insufficient working time is a problem.
- the surface roughness of the base material layer affects the roughness of the printing surface of the ink receiving layer, it is preferably as smooth as possible when used for hydraulic transfer.
- the surface of the base material layer on the side where the ink receiving layer is formed has a surface roughness Ra of 0.40 ⁇ m or less and a gloss of 80 or more. Can be smoothed. If the surface roughness Ra is 0.40 ⁇ m or less, the gloss does not necessarily become 80 or more, and these properties can be obtained independently.
- Ra is preferably 0.30 ⁇ m or less, more preferably 0.25 ⁇ m or less, and most preferably 0.20 ⁇ m or less.
- the gloss is preferably 88 or more, more preferably 130 or more, and most preferably 150 or more. Similar to the value of Ra, the effect of the present invention can be further improved by reducing Rz on the surface of the base material layer to reduce the maximum unevenness. Therefore, Rz is 3.00 ⁇ m or less, preferably 2.00 ⁇ m or less.
- the wetting tension of the film surface of the base material layer can be set to 30 to 46 mN / m.
- the wetting tension is smaller than 30 mN / m, the aqueous solution for forming the ink receiving layer such as polyvinyl alcohol generates repelling on the surface of the base material layer, so that the aqueous solution cannot be applied.
- the affinity between the surface of the base material layer and the ink receiving layer such as polyvinyl alcohol is strong, and the ink receiving layer such as polyvinyl alcohol from the base material layer is used when the image is printed and subjected to hydraulic transfer.
- the problem is that the film cannot be peeled off. Therefore, the above-described wetting tension can be obtained by performing hydrophilic treatment by plasma treatment or corona discharge treatment, application of a surface treatment agent, or the like as necessary.
- the hydraulic transfer film of the present invention may be a film having at least two layers including an ink receiving layer and a base material layer, and its production method is not particularly limited.
- a general method such as spray coating or solution casting using an aqueous solution obtained by dissolving a material for forming an ink receiving layer such as polyvinyl alcohol on a base film such as PET or PP.
- An ink receiving layer can be formed by various film forming techniques, heated and dried to form a film, and then image layers can be laminated by a printing technique.
- an ink receiving layer having polyvinyl alcohol or the like may be laminated on the base material layer by thermal lamination.
- a method of casting an aqueous solution of polyvinyl alcohol on the base material layer is preferable, and a film can be formed regardless of the degree of polymerization of polyvinyl alcohol.
- the wet tension of the surface of the base material layer is 30 to 30 as a condition for wetting the solution that can form the ink receiving layer such as an aqueous polyvinyl alcohol solution, particularly when the solution is an aqueous solution. It is required to be 46 mN / m. If the wetting tension is less than 30 mN / m, the aqueous solution of polyvinyl alcohol generates repelling on the surface of the base material layer, so that the aqueous solution cannot be applied.
- the wetting tension is preferably 34 mN / m or more and / or 45 mN / m or less. Since the surface roughness of the substrate layer affects the roughness of the printing surface of the ink receiving layer, it is preferably as smooth as possible when used for hydraulic transfer.
- Ra should be 0.40 ⁇ m or less and gloss should be 80 or more, and examples thereof include polyethylene terephthalate, polypropylene, nylon, polystyrene, polyethylene, and synthetic paper.
- the hydraulic transfer film of the present invention is used for hydraulic transfer after forming a printing layer on the surface of the ink receiving layer.
- a known ink can be selected and used.
- Such an ink may be a solvent type ink or an ultraviolet ray curable or electron beam curable energy ray curable ink.
- the solvent used is aliphatic carbon such as pentane, hexane, heptane, octane, etc., or a mixture thereof such as gasoline, petroleum, benzine, mineral spirit, petroleum naphtha, etc.
- Hydrogens aromatic hydrocarbons such as benzene, toluene, xylene, cyclohexane, ethylbenzene; halogenated hydrocarbons such as trichloroethylene, perchlorethylene, chloroform, carbon tetrachloride; methyl alcohol, ethyl alcohol, n-propyl alcohol Monohydric alcohols such as isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, amyl alcohol, benzyl alcohol, diacetone alcohol; polyhydric alcohols such as ethylene glycol, propylene glycol, glycerin Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, methyl cyclohexanone, isophorone; ethyl ether, isopropyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, di
- aromatic hydrocarbons such as benzene, toluene, xylene, etc., and ethyl acetate, propyl acetate, butyl acetate, cellosolve, cyclohexanone, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, Methyl ethyl ketone, methyl isobutyl ketone, propylene glycol monobutyl ether, and propylene glycol are preferably used from the viewpoint of solubility in the activator composition.
- these solvents can be used individually by 1 type or in mixture of 2 or more types.
- the ink is an ink having an aqueous solvent
- water alone or a mixed solvent obtained by selecting and mixing water and a water-soluble organic solvent agent among the above solvents can be used.
- an aqueous solvent may be used.
- an organic solvent-based ink is preferable for hydraulic transfer because it is excellent in water resistance.
- water-insoluble ones can be used as the colorant contained in the ink.
- titanium white, antimony white, lead white, iron black, yellow lead, titanium yellow, vermilion, cadmium red, ultramarine, cobalt blue, pearl pigment Inorganic pigments such as silver pigments such as aluminum paste; organic pigments such as carbon black (black ink), benzidine yellow, isoindolinone yellow, polyazo red, quinacridone red, indanthrene blue, and phthalocyanine blue can be used.
- oils such as linseed oil, soybean oil, synthetic drying oil; natural resins such as rosin, hardened rosin, rosin ester, polymerized rosin; phenol resin, Synthetic resins such as rosin-modified phenolic resin, maleic acid resin, alkyd resin, petroleum resin, vinyl resin, acrylic resin, polyamide resin, epoxy resin, aminoalkyd resin, fluorine resin; nitrocellulose, cellulose acetate butyrate resin And cellulose derivatives; rubber derivatives such as chlorinated rubber and cyclized rubber; and other caseins, dextrins and zeins.
- various oils such as linseed oil, soybean oil, synthetic drying oil
- natural resins such as rosin, hardened rosin, rosin ester, polymerized rosin
- phenol resin Synthetic resins such as rosin-modified phenolic resin, maleic acid resin, alkyd resin, petroleum resin, vinyl resin, acrylic resin, polyamide resin, epoxy resin, aminoalkyd
- an ultraviolet absorber or a light stabilizer In consideration of stability during use after hydraulic transfer, etc., various necessary additives can be added to the ink in advance. Therefore, it is preferable to add an ultraviolet absorber or a light stabilizer, and the weather resistance of the printing layer transferred to the transfer surface of the transfer target can be improved.
- the ultraviolet absorber include organic compounds such as benzotriazole, benzophenone, and salicylic acid ester, and inorganic compounds such as fine particle zinc oxide and cerium oxide having a particle size of 0.2 ⁇ m or less.
- examples thereof include hindered amine radical scavengers such as bis- (2,2,6,6-tetramethyl-4-piperidinyl) sebacate and radical scavengers such as piperidine radical scavengers.
- ultraviolet absorbers and light stabilizers are about 0.5 to 10% by mass, respectively.
- an ink containing a monomer, an oligomer, or the like that optionally contains a colorant such as a pigment and has a property of being cured by irradiation with energy rays can be used.
- Print layer formation As a means for forming a printing layer using the above-described ink, a printing method conventionally employed in hydraulic transfer such as offset printing, letterpress printing, and gravure printing may be used, but on-demand printing such as inkjet printing is possible. But you can.
- ink jet printing the base film is required to be white in order to confirm a finished printed image. If the color is not white, it is not preferable because the operation for checking whether there is any chipping or color unevenness in the printed image becomes complicated.
- the activator is applied on the ink-receiving layer on the hydraulic transfer film to moderately dissolve or swell and soften (activate) at least a part of the printed portion. That state can be maintained until is transferred.
- Application onto the ink receiving layer may be performed after the hydraulic transfer film is floated on the water surface, or may be performed before it is floated.
- the activator used in the present invention comprises alcohols, ketones, plasticizers and esters having a boiling point of 170 ° C. or higher.
- Alcohols include ethyl alcohol (boiling point 78 ° C), isopropyl alcohol (boiling point 82 ° C), tert-butyl alcohol (boiling point 84 ° C), n-propyl alcohol (boiling point 97 ° C), 2-butyl alcohol (boiling point 99 ° C).
- Low boiling alcohols having a boiling point of 70 to 100 ° C. high boiling alcohols having a boiling point of more than 100 to 130 ° C. such as isobutyl alcohol (boiling point 108 ° C.), n-butyl alcohol (boiling point 117 ° C.), etc. , Or a combination of two or more.
- isopropyl alcohol and isobutyl alcohol are preferred. Further, it is preferable to use a low-boiling alcohol and a high-boiling alcohol in combination, and particularly a combination of isopropyl alcohol and isobutyl alcohol is preferable, and a mass ratio of the blend is preferably 1: 7 to 1: 1, and 1: 6. 5 to 1: 2 is more preferable.
- ketones include those having a boiling point of 200 ° C. or lower, such as methyl ethyl ketone (boiling point 80 ° C.), methyl isobutyl ketone (boiling point 116 ° C.), dibutyl ketone (boiling point 187 ° C.), and diisobutyl ketone (boiling point 168 ° C.). Of these, diisobutyl ketone is preferred.
- Preferred examples of the plasticizer include phthalate esters.
- the plasticizer is for imparting the activator with a function of softening the ink of the printing layer.
- Preferred examples of the phthalic acid ester include phthalic acid diesters such as dimethyl phthalate, dibutyl phthalate, dioctyl phthalate, and diisooctyl phthalate. Of these, dimethyl phthalate and dibutyl phthalate are more preferable, and among them, dimethyl phthalate is preferable from the viewpoint of stabilizing the active state and evaporating with other solvents appropriately.
- esters having a boiling point of 170 ° C. or higher include acetate esters such as dibutyl oxalate (boiling point 246 ° C.) and methoxybutyl acetate (boiling point 172 ° C.), and glycol ether acetates such as butyl carbitol acetate (boiling point 247 ° C.). Based esters and the like. Of these, dibutyl oxalate is preferred.
- the content of alcohol in the activator used when using the hydraulic transfer film of the present invention is preferably 60 to 90% by mass, more preferably 65 to 80% by mass.
- the ester content is preferably 0 to 15% by mass, and more preferably 5 to 12% by mass.
- the content of ketones is preferably 1 to 20% by mass, and more preferably 5 to 12% by mass.
- the plasticizer content is 1 to 20% by mass, and there is no problem that a part of the ink dissolves too quickly, and printed characters and patterns do not flow or distort. ⁇ 18% by weight is preferred.
- the activator used in the present invention can contain aliphatic hydrocarbons and ethers.
- the aliphatic hydrocarbon include heptane, 2-methylhexane, 3-methylhexane, 3-ethylpentane, octane, isooctane, etc.
- heptane is preferable.
- ethers include butyl cellosolve and isoamyl cellosolve, and among these, butyl cellosolve is preferable.
- the following resin can be added to the activator used in the present invention in an amount of about 1 to 20% by mass with respect to the solvent.
- this resin include vinyl halide polymers such as polyvinyl chloride and polyvinylidene chloride; styrene polymers such as polystyrene and polystyrene derivatives; vinyl ester polymers such as polyvinyl acetate; (meth) acrylic acid, itacon Polymers of ester derivatives of unsaturated carboxylic acids such as acid, crotonic acid, maleic acid or fumaric acid; polymers of nitrile derivatives or acid amide derivatives; N-methylol derivatives of acid amide derivatives of the above unsaturated carboxylic acids N-alkylmethylol ether derivatives, glycidyl (meth) acrylate, allyl glycidyl ether, vinyl isocyanate, allyl isocyanate, 2-hydroxyethyl- (meth)
- the hydraulic transfer film of the present invention can use a widely used apparatus for hydraulic transfer, and the transfer target may be an object on which a pattern or the like is formed by hydraulic transfer, and has the same three-dimensional shape as before. I just need it.
- the material of the transfer object is not particularly limited, and may be any material such as resin, metal, and wood.
- the dissolved and / or swollen ink receiving layer is transferred to the transfer medium while being swung around by the hydraulic pressure.
- the transfer object taken out from the water with a large amount of water the PVA remaining on the surface is removed, and the transfer of the image onto the transfer object is completed.
- the solution for forming the ink receiving layer such as polyvinyl alcohol used for solution casting etc. follows the unevenness on the cast surface side of the base material layer with good reproducibility, and the solution itself is somewhat Therefore, the roughness of the surface of the base material layer is reflected in the roughness of the surface of the ink receiving layer. Therefore, when printing is performed on the air surface side of the printing layer, it is estimated that the image appears to be deteriorated because light is slightly diffusely reflected on the surface of the printing layer.
- the surface area of the polyvinyl alcohol film increases due to the unevenness of the base material layer, and there are many areas that come into contact with water when floating on the surface of the water, and fine wrinkles are likely to occur because the swelling behavior of the film tends to be accelerated. For this reason, it is considered that the wrinkles remain on the surface of the obtained film after transfer. Therefore, by suppressing the surface roughness Ra of the base material layer to 0.40 ⁇ m or less, a hydraulic transfer film is obtained in which the surface image of the printing layer becomes high definition and the wrinkle of the image on the surface of the transferred material is reduced. be able to.
- the present invention is a hydraulic transfer film having a base material layer and an ink receiving layer, and when the surface roughness of the base material layer is Ra 0.40 ⁇ m or less, the water pressure of high image quality can be easily achieved by ink jet printing. A transfer image can be obtained.
- Peelability evaluation A print receiving layer made of PVA laminated on an A4 size base material was peeled off by hand, and the peel condition was evaluated. The peelability is classified into two stages according to the following criteria. When it can be peeled off from the substrate without resistance Other than the above (Peeled before touching by hand, cannot peel, PV after peeling In the case of streaks that can be visually confirmed in the A film) ⁇
- a multilayer film was obtained by laminating an ink receiving layer having a thickness of 30 ⁇ m made of partially saponified polyvinyl alcohol having a polymerization degree of 2000 and a saponification degree of 88.0 mol% (manufactured by Nihon Acetate / Poval) on various substrate layers. . Thereafter, the ink receiving layer was printed with a wood grain pattern with pigment ink using an ink jet printer PX series (manufactured by EPSON: PX-G930) to obtain a hydraulic transfer film. A pipe-shaped molded product made of vinyl chloride having a diameter of 20 mm and a length of 15 cm was used as the transfer object.
- the print receiving layer of the film is floated on the water surface with the printing surface facing upward at a water temperature of 30 ° C. After 100 seconds, the activator is sprayed onto the printed image surface, and the transfer object is gently inserted from the upper surface of the film to transfer the image. Did.
- Ra and gloss are within the scope of the present invention. Both the property and the transferred image were good, and the evaluation was good.
- YUPO GFG has a Ra value within the range of the present invention, the gloss value is out of the range. Therefore, the releasability is good, but the solubility and transferability are poor. Further, when both Ra and gloss values are outside the range of the present invention, the peelability, solubility, and transfer image were all poor.
- the present invention performs water pressure transfer smoothly and reliably, particularly by setting the surface of the base material to a specific Ra and gloss range. It can be seen that the effect that the transferred image is also good can be exhibited.
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Abstract
Description
さらにこれらの水圧転写用のフィルムは、その印刷面側でない側の面も直接水面に接するので、シワが発生しやすく、加えて被対象物を水面に押し入れる際に水の流動を生じてフィルムにシワを生じやすく、結果的に被対象物表面への水圧転写を確実に行うことが困難である。
1.水圧転写用フィルムであって、ポリビニルアルコールからなるインク受容層と基材層の少なくとも2層を含み、前記基材層の少なくともインク受容層と触れる表面の表面粗さRaが0.14μm以上0.40μm未満、かつグロスが80以上であることを特徴とする、水圧転写用フィルム。
2.基材層の前記表面の濡れ張力が30~46mN/mであることを特徴とする、1記載の水圧転写用フィルム。
3.前記基材層が白色であることを特徴とする、1又は2に記載の水圧転写用フィルム。
4.前記インク受容層が重合度1000~4000、ケン化度70~99モル%のポリビニルアルコールであることを特徴とする、1~3のいずれかに記載の水圧転写用フィルム。
5.インクジェット印刷にて印刷画像を形成したことを特徴とする、1~4のいずれかに記載の水圧転写用フィルム。
その結果、インク受容層の表面に印刷をした場合、インク受容層の表面で光が乱反射することなく、画像が劣化して見えることもない。なお、仮に基材層表面が平滑でなければ、インク受容層表面に光が乱反射することにより、画像も劣化して見える。
本発明は基材層の表面粗さRaを0.40μm以下、かつグロスを80以上、より好ましくはRa0.20μm以下、かつグロスを88以上にすることで、インク受容層の表面の画像が高精細になり、転写物表面の画像のシワも低減できる、水圧転写用フィルムとなる。インク受容層を基材層からシワを発生させずに剥離するためには、基材層の表面の濡れ張力が30~46mN/mであれば、基材層とインク受容層との極性基の反発があるため可能である。
さらに被対象物に水圧転写を行うにあたり、被対象物を水面に浮かべた水圧転写用フィルムから剥離したインク受容層の印刷面側より押し入れる際に、インク受容層から均一に押圧力がかかることにより、水の流動に影響されず正確に水圧転写を行うことが可能である。
さらに基材層の濡れ張力は30~46mN/mであり、インク受容層が重合度1000~4000、ケン化度70~99モル%のポリビニルアルコールからなり、濡れ張力30~46mN/mの平滑な表面を有する基材であれば高精細な印刷像が得られること、さらに基材層が白色であれば印刷により簡便に精細な印刷像が得られるか否かを確認できる水圧転写用PVAフィルムとして機能することを見出し、本発明を完成するに至った。
本発明におけるインク受容層は、水溶性もしくは水膨潤性を有するものが好ましく、従来から水圧転写用フィルムとして一般に使用されているフィルムの材料の中から適宜選択して用いることができる。
そのような材料である樹脂としては、例えばポリビニルアルコール樹脂、デキストリン、ゼラチン、にかわ、カゼイン、セラック、アラビアゴム、澱粉、蛋白質、ポリアクリル酸アミド、ポリアクリル酸ナトリウム、ポリビニルメチルエーテル、メチルビニルエーテルと無水マレイン酸との共重合体、酢酸ビニルとイタコン酸との共重合体、ポリビニルピロリドン、アセチルセルロース、アセチルブチルセルロース、カルボキシメチルセルロース、メチルセルロース、ヒドロキシエチルセルロース、アルギン酸ナトリウム等が挙げられる。これらの樹脂は、単独で用いられてもよいし、2種以上が混合されて用いられてもよい。なお、基材フィルムには、マンナン、キサンタンガム、グアーガム等のゴム成分が添加されていてもよい。
これらの材料のうち、特に生産安定性と水に対する溶解性及び経済性の点から、ポリビニルアルコールが好ましい。用いられるポリビニルアルコールは、未変性PVAであっても、あるいはPVAの主鎖中にエチレン、プロピレン等のオレフィン類、アクリル酸エステル類、メタクリル酸エステル類、マレイン酸及びその塩又はエステル類、等のモノマーが1種類又は2種類以上共重合された変性PVAであってもよい。
なかでも、本発明においては、ポリビニルアルコールの重合度は1000~4000が好ましい。重合度が1000未満の場合、水圧転写をする際に溶解が速く、十分なつきまわり性が得られない場合があり、水圧転写本来の機能を十分発揮できない恐れがある。一方、重合度が4000を越える場合には、フィルムの水溶性が低く、経済的な水圧転写速度が得られないことがある。
インク受容層の厚さは15~80μmが好ましく、より好ましくは20~40μmである。15μm未満では基材層からインク受容層を剥がした際に、フィルムの腰が乏しく取り扱いに支障がでる。また、80μmより厚いとインク受容層の膨潤に時間がかかり水圧転写作業性が低下する問題がある。
また、ポリビニルアルコールは、それ以外の上記の水溶性高分子と混合してもよく、例えば、ゼラチン、カゼイン、アラビアゴム、ポリビニルピロリドン、プルラン、メチルセルロース、ヒプロメロース、エチルセルロース等を挙げることができる。水溶性高分子の添加量は、ポリビニルアルコール100重量部に対して、好ましくは20重量部以下である。
本発明における基材層としては、環境の温度、湿度変化による寸法安定性に優れる材料からなることが好ましく、かつ水圧転写フィルムが印刷時や裁断等の工程で取り扱いされることを考慮して柔軟性を有することが必要である。大きさ及び形状は問わないが、インク受容層への印刷工程を連続的に行う場合にはフィルムの移送性を考慮して柔軟なフィルムを採用することもできる。
そのような材料として、ポリエチレン、ポリプロピレン、PET、ポリ塩化ビニル、ナイロン等の樹脂フィルム、金属箔、紙等を使用することができる。なかでも、水圧転写用フィルム表面に印刷した後にその印刷の出来等を確認することを容易にするために、基材層に任意の白色顔料あるいはその他の顔料を添加しておくことや表面に白色を呈する層を形成しておくことができる。
一方、合成紙等のポリプロピレンの積層物や、表面を各種コート層で覆ったもののほか、紙の表面にポリプロピレンをコートしたものを使用できる。粗さの指標であるRaが0.40μmより大きい基材であると、その上に積層したPVAフィルムの基材と接していない側(エアー面側)にも、その粗さに起因すると思われる凹凸が再現されてしまう。そのため、PVAフィルム自体に粗さに由来する文様が浮かび上がったり、凹凸で光が乱反射するために得られる画像の光沢が低減してしまうため、高画質な画像を得ることが適わず、写真画像をそのままの高画質で立体の被対象物へ転写することができない問題がある。
さらに、粗さRaが0.40μmより大きいと、凹凸のためPVAフィルムが白濁して見えることがある。その場合には、印刷画像の仕上がりを確認する際に邪魔になるほか、凹凸によりPVAフィルムの厚薄が不均一となり、特に薄いところが先に溶解するため水圧転写の作業時に印刷画像にシワが入ったり、適正な作業時間を確保できないことが問題となる。
そして、Raは好ましくは0.30μm以下、さらに好ましくは0.25μm以下、最も好ましくは0.20μm以下である。
また、グロスは好ましくは88以上、さらに好ましくは130以上、最も好ましくは150以上である。
Raの値と同様に、基材層表面のRzを小さくして最大の凹凸をより小さくすると、さらに本発明による効果を向上させることができる。そのため、Rzは3.00μm以下、好ましくは2.00μm以下である。
そのために、必要に応じてプラズマ処理やコロナ放電処理による親水化、表面処理剤の塗布等を行うことにより上記の濡れ張力とすることができる。
本発明の水圧転写用フィルムを製造する方法としては、上記基材層を形成するフィルムにインク受容層を形成する方法を採用できる。
本発明の水圧転写フィルムはインク受容層と基材層を含む少なくとも2層のフィルムであればよく、その製法は特に限定されるものではない。
例えばPETやPP等の基材層である基材フィルムの上に、ポリビニルアルコール等のインク受容層を形成する材料を溶解してなる水溶液を用いて、スプレーコートもしくは溶液流延法等の一般的な製膜手法によりインク受容層を形成し、加熱乾燥してフィルム化後、印刷手法により画像層を積層して得ることができる。もしくは、基材層に熱ラミネーションによりポリビニルアルコール等を有するインク受容層を積層してもよい。
なかでも基材層にポリビニルアルコールの水溶液を溶液流延する手法が好ましく、ポリビニルアルコールの重合度によらずフィルム化することができる。
いずれの方法にしても、水圧転写時には基材層からインク受容層を剥離できるようにすることが必要である。このため、基材層とインク受容層は、剥離可能かつインク受容層に安定して印刷可能な程度の接着強度を有することが必要である。
濡れ張力は好ましくは34mN/m以上、及び/又は45mN/m以下である。
基材層の表面粗さはインク受容層の印刷面の粗さに影響するため、水圧転写に用いる場合には可能な限り平滑な方が好ましい。特にRaが0.40μm以下、かつグロスが80以上であればよく、例えばポリエチレンテレフタレート、ポリプロピレン、ナイロン、ポリスチレン、ポリエチレン、合成紙等が挙げられる。
本発明の水圧転写フィルムはインク受容層表面に印刷層を形成した後に水圧転写に使用されるものであるが、その印刷に用いられるインクとしては、公知のインクを選択して使用することができる。
そのようなインクとしては、溶剤型のインクでもよく、あるいは紫外線硬化性や電子線硬化性のエネルギー線硬化型インクでもよい。
インクが水性の溶剤を有するインクである場合には、溶剤として水のみ、あるいは水と上記溶剤のなかでも水溶性有機溶媒剤を選択・混合してなる混合溶剤を使用することができる。
ただし、上記のインクのなかで、水性溶剤を用いたものでもよいが、有機溶剤系のインクの方が耐水性に優れるため水圧転写に好ましい。
紫外線吸収剤としては、例えばベンゾトリアゾール、ベンゾフェノン、サリチル酸エステル等の有機系化合物や、粒径0.2μm以下の微粒子状の酸化亜鉛、酸化セリウム等の無機質系化合物が挙げられ、また、光安定剤としては、例えばビス-(2,2,6,6-テトラメチル-4-ピペリジニル)セバケート等のヒンダードアミン系ラジカル捕捉剤、ピペリジン系ラジカル捕捉剤等のラジカル捕捉剤等を挙げることができる。
なお、これら紫外線吸収剤や光安定剤の含有量は、それぞれ0.5~10質量%程度である。
エネルギー線硬化型インクの場合には、顔料等の着色剤を任意に含み、かつエネルギー線の照射によって硬化する性質を備えたモノマーやオリゴマー等を含有するインクを使用することができる。
上記のインクを使用して印刷層を形成させる手段としては、オフセット印刷、凸版印刷、グラビア印刷等の従来から水圧転写にて採用した印刷方法でもよいが、インクジェット印刷のようにオンデマンド型の印刷でもよい。
インクジェット印刷を行う場合、出来上がりの印刷画像を確認するために、基材フィルムには白色であることが求められる。白色でないと、印刷後の画像に欠けや色ムラがないか確認する作業が煩雑となり好ましくない。加えて、業務用のインクジェットプリンターでは光学センサーにて用紙を認識している機構もあり、その機構の場合には白色でないと通紙ができない。
活性剤は、水圧転写用フィルム上のインク受容層上に塗布することで、適度に印刷部分の少なくとも一部を溶解又は膨潤して軟化させる(活性化させる)ものであり、被転写体に印刷物が転写されるまでその状態を維持することができるものである。インク受容層上への塗布は水圧転写用フィルムを水面に浮かべた後に行ってもよく、浮かべる前でもよい。
本発明で用いる活性剤は、アルコール類、ケトン類、可塑剤及び沸点170℃以上のエステル類からなるものである。
フタル酸エステルとしては、フタル酸ジメチル、フタル酸ジブチル、フタル酸ジオクチル、フタル酸ジイソオクチル等のフタル酸ジエステルが好ましく挙げられる。これらのうちフタル酸ジメチル及びフタル酸ジブチルがより好ましく、なかでもフタル酸ジメチルが活性状態を安定化させるのとともに、適度に他の溶剤とともに蒸発する点から好ましい。
脂肪族炭化水素としては、ヘプタン、2-メチルヘキサン、3-メチルヘキサン、3-エチルペンタン、オクタン、イソオクタン等が挙げられ、これらのうちヘプタンが好ましい。
エーテル類としては、ブチルセロソルブ、イソアミルセロソルブ等が挙げられ、このうちブチルセロソルブが好ましい。
本発明の水圧転写フィルムは、広く使用されている水圧転写用装置を使用することができ、また被転写体も、水圧転写により模様等が形成される物体でよく、従来と同様の立体形状であればよい。該被転写体の材質も特に制限されるものではなく、樹脂、金属、木材等の任意の材質のものでよい。
画像印刷が済んだ水圧転写フィルムから、基材を剥離し、印刷面が上になるように水面にインク受容層のみを浮かべると、PVAフィルムが十分な水分を含み柔らかくなった頃合に、活性剤を噴霧した水面上の水圧転写フィルムを被転写体により水中に押し下げる。その結果、溶解及び/又は膨潤したインク受容層が水圧により付きまわりながら被転写体に転写されることになる。水中より取り出した被転写物を多量の水で洗い流すことで、表面に残存するPVAが除去され、被転写体への画像の転写が完了することとなる。
本発明の水圧転写フィルムを用いて水圧転写を行う際に、粗さRa0.40μm以下、かつグロスが80以上である基材を用いると、その上にある印刷層のPVA等のフィルムの表面、つまり水圧転写後に表面となる側の層も凹凸が小さく、グロスの高いフィルムが得られる。そのため、そのPVA等の表面に印刷された画像もグロスの高い水圧転写が可能である。PVAフィルムの凹凸が少ないことから、PVAフィルムの溶解時間も均一となり、安定した品質を持つ、高画質な水圧転写を簡便な作業により得ることができる。
また、基材層の凹凸によりポリビニルアルコールフィルムの表面積が増加し、水面に浮かべた際に水と接触する面積が多く、フィルムの膨潤挙動が早くなる傾向にあるため細かいシワが入りやすくなる。
そのため、得られる転写後のフィルム表面にシワが残存する原因と考えられている。故に、基材層の表面粗さRaを0.40μm以下に抑制することで、印刷層の表面の画像が高精細になり、転写物表面の画像のシワが低減された水圧転写用フィルムを得ることができる。
印刷層が基材層から剥離するためには、基材層の表面の濡れ張力が30~46mN/mであれば、基材層と印刷層との極性基の反発により容易に剥離できる。
以上のことから、本発明は基材層とインク受容層を有する水圧転写用フィルムであって、基材層の表面粗さがRa0.40μm以下である場合、インクジェット印刷により簡便に高画質な水圧転写画像を得ることができる。
表面粗さ評価
23℃、50%RHの雰囲気下で、粗さ計(accretech社製:Handysurf E-35A)でRa、Rzを測定した。グロスはグロス計(日本電色工業社製:GlossMeterVG7000)で測定した。
A4サイズの基材に積層したPVAからなる印刷受容層を手により引き剥がし、剥離具合を評価した。
剥離性を以下の基準で2段階に分類する。
基材から、手で剥がす際に抵抗なく剥離できる場合・・・○
上記以外(手で触れる前に剥離している、剥離できない、剥離後のPV
Aフィルム中に目視で確認できる筋が入る)の場合・・・×
10cm×10cm角の水圧転写用フィルムの基材から剥離したPVAフィルムを水面上に浮かべ、その印刷受容層が膨潤し、60秒以内に溶解しないかを目視にて観察した。
溶解性を以下の2段階に分類する。
60秒以内に溶解しない場合・・・○
60秒以内に溶解した場合 ・・・×
A4サイズの写真画像を印刷済みの印刷受容層を水面に浮かべ、60秒後にそのフィルムの上面より、ABS製の白色成形体に水圧転写を実施した。その後、その画像のシワを目視にて観察した。
シワの様子を以下の2段階に分類する。
シワがない場合・・・○
シワがある場合・・・×
剥離性が“○”かつ溶解性が“○”、転写画像が“○”の場合・・・○
剥離性が“○”かつ溶解性が“○”、転写画像が“×”の場合・・・×
剥離性が“○”かつ溶解性が“×”、転写画像が“○”の場合・・・×
剥離性が“×”かつ溶解性が“○”、転写画像が“○”の場合・・・×
剥離性が“○”かつ溶解性が“×”、転写画像が“×”の場合・・・×
剥離性が“×”かつ溶解性が“○”、転写画像が“×”の場合・・・×
剥離性が“×”かつ溶解性が“×”、転写画像が“○”の場合・・・×
剥離性が“×”かつ溶解性が“×”、転写画像が“×”の場合・・・×
しかしながら、ユポGFGはRaの値は本発明の範囲内であるが、グロスの値が範囲外であるため、剥離性は良好であるものの、溶解性及び転写性が不良であった。
さらにRa及びグロスの値がともに本発明の範囲外であると、剥離性、溶解性さらに転写画像のいずれも不良であった。
これらの結果によれば、本発明は基材を採用することに加えて、特にその基材の表面を特定のRa及びグロスの範囲とすることにより、水圧転写を円滑に、かつ確実に行うことができ、転写された画像も良好であるという効果を発揮できることがわかる。
Claims (5)
- 水圧転写用フィルムであって、ポリビニルアルコールからなるインク受容層と基材層の少なくとも2層を含み、前記基材層の少なくともインク受容層と触れる表面の表面粗さRaが0.14μm以上0.40μm未満、かつグロスが80以上であることを特徴とする、水圧転写用フィルム。
- 基材層の前記表面の濡れ張力が30~46mN/mであることを特徴とする、請求項1記載の水圧転写用フィルム。
- 前記基材層が白色であることを特徴とする、請求項1又は2に記載の水圧転写用フィルム。
- 前記インク受容層が重合度1000~4000、ケン化度70~99モル%のポリビニルアルコールであることを特徴とする、請求項1~3のいずれかに記載の水圧転写用フィルム。
- インクジェット印刷にて印刷画像を形成したことを特徴とする、請求項1~4のいずれかに記載の水圧転写用フィルム。
Priority Applications (6)
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KR1020137009283A KR101385825B1 (ko) | 2011-12-21 | 2012-12-06 | 수압 전사용 필름 |
EP12840881.2A EP2634010B1 (en) | 2011-12-21 | 2012-12-06 | Film for hydraulic transfer |
ES12840881.2T ES2525299T3 (es) | 2011-12-21 | 2012-12-06 | Película para transferencia hidráulica |
CN201280003390.7A CN103260899B (zh) | 2011-12-21 | 2012-12-06 | 水压转印用膜 |
US13/878,370 US8865276B2 (en) | 2011-12-21 | 2012-12-06 | Water-pressure transfer printing film |
PL12840881T PL2634010T3 (pl) | 2011-12-21 | 2012-12-06 | Folia do hydrodruku |
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JP2011279916A JP5129883B1 (ja) | 2011-12-21 | 2011-12-21 | 水圧転写用フィルム |
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US (1) | US8865276B2 (ja) |
EP (1) | EP2634010B1 (ja) |
JP (1) | JP5129883B1 (ja) |
KR (1) | KR101385825B1 (ja) |
CN (1) | CN103260899B (ja) |
ES (1) | ES2525299T3 (ja) |
PL (1) | PL2634010T3 (ja) |
TW (1) | TWI451979B (ja) |
WO (1) | WO2013094424A1 (ja) |
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Also Published As
Publication number | Publication date |
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TW201339009A (zh) | 2013-10-01 |
PL2634010T3 (pl) | 2015-04-30 |
JP2013129114A (ja) | 2013-07-04 |
CN103260899A (zh) | 2013-08-21 |
ES2525299T3 (es) | 2014-12-19 |
EP2634010B1 (en) | 2014-11-05 |
TWI451979B (zh) | 2014-09-11 |
US8865276B2 (en) | 2014-10-21 |
KR20130084658A (ko) | 2013-07-25 |
KR101385825B1 (ko) | 2014-04-16 |
EP2634010A1 (en) | 2013-09-04 |
EP2634010A4 (en) | 2013-10-30 |
JP5129883B1 (ja) | 2013-01-30 |
CN103260899B (zh) | 2014-12-10 |
US20140170340A1 (en) | 2014-06-19 |
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