JPH0729084B2 - Sheet for hydraulic transfer and method of using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to chemical resistance, solvent resistance,
A hydraulic transfer sheet used when forming a curable resin layer having excellent properties such as scratch resistance by utilizing hydraulic pressure, the hydraulic transfer sheet being capable of being rolled up, and The present invention relates to a method of using a hydraulic transfer sheet, that is, a method of forming a curable resin layer on the surface of various molded articles using the hydraulic transfer sheet.

[Prior Art] Methods for forming a curable resin layer on the surface of various molded products include direct coating and curing of a coating agent on the surface of the molded product and release films having a curable resin layer. There is a method in which the curable resin layer is transferred onto the surface of the molded body and cured by using the transfer sheet.

[Problems to be Solved by the Invention] By the way, among the methods of forming a curable resin layer on the surface of a molded body described above, the former method of using a coating agent is generally used for coating and curing the coating agent. Prior to the above, a pattern layer is formed by a printing means or a transfer painting method, and the surface of the molded body on which the pattern layer is formed is coated with a coating agent, so the process is complicated, and Problems such as coating spots and scattering of the coating agent may occur during the coating process, making it difficult to obtain high quality products.

In addition, the latter method using the transfer sheet is insufficient in flexibility of the transfer sheet, and therefore, the adhesion of the transfer sheet in the transfer step is insufficient for a molded article having a non-flat surface, Similarly, it has a drawback that it is difficult to obtain a product of good quality.

On the other hand, the first aspect of the present invention is a hydraulic transfer sheet used when forming a curable resin layer on the surface of various molded articles by a transfer method utilizing hydraulic pressure, and can be rolled up. A second aspect of the present invention provides a transfer sheet that can be used, and a second aspect of the present invention is a method of using the hydraulic transfer sheet of the first aspect of the present invention. A method for forming a high-curability resin layer is provided.

[Means for Solving Problems] In the hydraulic transfer sheet according to the first aspect of the present invention, the hydraulic transfer sheet base material made of a water-soluble or water-swellable film has a glass transition on one surface of the sheet base material. Consists of a compound having a radical-polymerizable unsaturated group in a polymer having a temperature of 0 to 250 ° C and / or a compound having a radical-polymerizable unsaturated group having a melting point of 20 to 250 ° C, and is solid at room temperature in an uncured state It is provided with a coating layer having a non-adhesive shape,
If desired, the coating layer is a coating layer containing a colorant, and the coating layer is a coating layer whose surface is coated with a thermoplastic resin layer, Is one in which the surface of the coating layer is covered with a colored printing layer, a metal vapor deposition layer, or a thermoplastic resin layer having both of them.

The method of using the hydraulic transfer sheet according to the second aspect of the present invention is as follows.
Of the invention, ie, a compound having a radically polymerizable unsaturated group in a polymer having a glass transition temperature of 0 to 250 ° C. and / or a melting point of 20 to 250 ° C. and having a radically polymerizable unsaturated group. A water-based transfer sheet comprising a compound, which is in an uncured state, is solid at room temperature and has a non-adhesive coating layer, and comprises a water-soluble or water-swellable film. The process of floating the water-swellable film on the surface of the water so that it faces downward, and by pushing the molded body forming the curable resin layer from the upper surface, the sheet for hydraulic transfer is spread on the outer surface of the molded body by hydraulic pressure, The step of bringing them into close contact with each other and transferring the coating layer on the hydraulic transfer sheet to the outer surface of the above-mentioned molded article, and removing the water-soluble or water-swellable film on the hydraulic transfer sheet. And a step of curing the coating layer by irradiating the coating layer adhered to the surface of the molded body with ionizing radiation. Consists of.

In the hydraulic transfer sheet of the first invention and the method of using the hydraulic transfer sheet of the second invention, the water-soluble or water-swellable film used as the hydraulic transfer sheet base material is, for example, polyvinyl chloride. Alcohol resin, dextrin, gelatin, glue, casein, shellac, gum arabic, starch, protein, polyacrylic acid amide, sodium polyacrylate, polyvinyl methyl ether, copolymer of methyl vinyl ether and maleic anhydride, vinyl acetate and itaconic acid Copolymer with, polyvinylpyrrolidone, cellulose, acetyl cellulose, acetyl butyl cellulose, carboxymethyl cellulose, methyl cellulose,
Cellulose derivatives such as hydroxyethyl cellulose,
A film of a single or mixed resin made of sodium alginate or the like.

The water-soluble or water-swellable film used as a sheet substrate for hydraulic transfer is 10 to 100 μ, preferably 20 to 60 μ.
The polyvinyl alcohol resin film has a thickness of about a certain degree, and a polyvinyl alcohol resin film is a coating layer made of an ionizing radiation curable resin by changing various conditions such as the degree of polymerization, the degree of saponification, and the addition of additives such as starch. Mechanical strength required for forming, mechanical strength required during printing, moisture resistance during handling, speed of softening due to water absorption after floating on water, time required for spreading or spreading, time required for transfer This is the most preferable because the ease of deformation and the like can be controlled.

An example of a more preferable film containing polyvinyl alcohol (PVA) resin as a main component is a composition of PVA resin 80% by weight, polymer water-soluble resin 15% by weight, and starch 5% by weight.
Equilibrium water content is about 3%.

The water-soluble or water-swellable film may be laminated with a water-permeable substrate such as paper, non-woven fabric, cloth, etc. However, when this laminated sheet is used as a hydraulic pressure transfer sheet substrate, It is preferable that the water-permeable substrate can be separated when the sheet is floated on water, or that the water-permeable substrate can be separated by the action of water when the sheet is floated on the water surface.

The coating layer formed on the hydraulic transfer sheet substrate has a resin having a radically polymerizable unsaturated group having a glass transition temperature of 0 to 250 ° C. and / or a melting point having a radically polymerizable unsaturated group of 20. It consists of an ionizing radiation curable resin made of a resin of up to 250 ° C., is in an uncured state, is solid at room temperature and is non-adhesive.

Therefore, the hydraulic transfer sheet of the present invention has the convenience of being able to handle the transfer sheet in a wound state.

The coating layer of the ionizing radiation-curable resin that is uncured, solid at room temperature, and non-adhesive is non-fluid and non-adhesive when it is apparently or touched by hand. And is obtained by using at least one kind of the following two kinds of resins (1) and (2) having a radically polymerizable unsaturated group.

(1) Those having a radically polymerizable unsaturated group in a polymer having a glass transition temperature of 0 to 250 ° C.

Specifically, a radical-polymerizable unsaturated group is introduced by a method (a) to (d) described below to a polymerized or co-polymerized one of the following compounds.

Monomers having hydroxyl group; N-methylol (meth) acrylamide, 2-didoxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2
-Hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate and the like.

Monomers having a carboxyl group; (meth) acrylic acid, (meth) acryloyloxyethyl monosuccinate and the like.

Monomers having epoxy groups; glycidyl (meth) acrylate and the like.

Monomers having an aziridinyl group; 2-aziridinylethyl (meth) acrylate, allyl 2-aziridinylpropionate and the like.

Amino group-containing monomer; (meth) acrylamide, diacetone (meth) acrylamide, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate and the like.

Monomers having sulfone groups; 2- (meth) acrylamido-2-methylpropanesulfonic acid and the like.

Monomers having isocyanate groups; Addition products of radically polymerizable monomers having diisocyanate active hydrogen, such as 1 mol to 1 mol adduct of 2,4-toluene diisocyanate and 2-hydroxyethyl (meth) acrylate.

Further, in order to control the glass transition point of the above-mentioned polymer or copolymer, or to control the physical properties of the cured film to be obtained, the above-mentioned compound and the following monomer which can be copolymerized with this compound are used. It can be co-polymerized with the monomer. Examples of such a copolymerizable monomer include, for example, methyl (meth) acrylate, ethyl (meth) acrylate,
Examples include propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, isoamyl (meth) acrylate, cyclohexyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.

Next, the polymer obtained as described above is reacted by the following methods (a) to (d) to introduce a radically polymerizable unsaturated group to obtain an ultraviolet or electron beam curable resin. .

In the case of (a) a polymer or copolymer of a monomer having a hydroxyl group, a monomer having a carboxyl group such as (meth) acrylic acid is subjected to a condensation reaction.

(B) In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfone group, the above-mentioned monomer having a hydroxyl group is subjected to a condensation reaction.

(C) In the case of a polymer or a copolymer of a monomer having an epoxy group, an isocyanate group or an aziridinyl group, the above-mentioned monomer having a hydroxyl group or a monomer having a carboxyl group is added.

(D) In the case of a polymer or copolymer of a monomer having a hydroxyl group or a carboxyl group, a monomer having an epoxy group, a monomer having an aziridinyl group or a diisocyanate compound and a hydroxyl group-containing acrylic acid ester unit amount An addition reaction of 1 to 1 mol of the body is carried out.

In order to carry out the above reaction, it is desirable to add a small amount of a polymerization inhibitor such as hydroquinone and to send it by sending dry air.

(2) A compound having a radically polymerizable unsaturated group having a melting point of 20 ° C to 250 ° C at room temperature.

Specific examples thereof include stearyl acrylate, stearyl (meth) acrylate, triacryl isocyanurate, cyclohexanediol diacrylate, cyclohexanediol (meth) acrylate, spiroglycol acrylate, and spiroglycol (meth) acrylate.

Further, the resins (1) and (2) may be mixed and used, and a radically polymerizable unsaturated monomer may be added to them.

This radically polymerizable unsaturated monomer improves the crosslink density and the heat resistance upon irradiation with ionizing radiation, and in addition to the above-mentioned monomers, ethylene glycol di (meth) acrylate and polyethylene. Glycol di (meta)
Acrylate, hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane di (meth) acrylate,
Pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ethylene glycol diglycidyl ether di (meth) acrylate, polyethylene glycol diglycidyl ether di (meth) acrylate, propylene glycol di Glycidyl ether di (meth) acrylate, polypropylene glycol diglycidyl ether di (meth) acrylate, sorbitol tetraglycidyl ether tetra (meth) acrylate or the like can be used, and 0.1 to 100 parts by weight of the solid content of the above-mentioned resin can be used. It is preferable to use 100 parts by weight.

Further, although the above can be sufficiently cured with an electron beam, when cured by irradiation with ultraviolet rays, benzoquinone, benzoin, benzoin ethers such as benzoin methyl ether, halogenated acetophenones, and biacetyls are used as sensitizers. Those that generate radicals by irradiation with ultraviolet rays, such as, can also be used.

In the coating composition, a polymerization inhibitor such as hydroquinone, hydroquinone monomethyl ether or benzoquinone is added as a stabilizer in order to prevent the compound from being cured before being irradiated with ultraviolet rays or before being irradiated with an electron beam. Is good.

In addition, in order to make the composition for coating into an ultraviolet curable coating,
In this composition, as a photopolymerization initiator, acetophenones, benzophenones, Michler benzoyl benzoate, α-amyloxy ester, tetramethylthiuram monosulfide, thioxanthone, and n-butylamine, triethylamine, triethylamine as photosensitizers. It is preferable to use a mixture of -n-butylphosphine and the like.

Furthermore, when a high degree of flexibility and shrinkage resistance is required for the curable resin layer obtained after the coating layer is cured with the composition, an appropriate amount of the thermoplastic resin in the curable coating material, For example, by adding a non-reactive acrylic resin or various waxes, it is possible to obtain a curable resin layer that meets these requirements.

The thermoplastic resin layer formed as desired on the surface of the coating layer made of a resin having a property of being cured by irradiation with ionizing radiation or heat, for example, a hydraulic transfer sheet is provided with an adhesive layer, In the case where transfer is carried out by the transfer sheet so that the layer comes into contact with the surface of the molded body, the binder component in the adhesive layer is used not in the adhesive performance for the curable resin layer but in the adhesive performance for the thermoplastic resin layer. Therefore, the selection range is wide, and so on.

Colored printing formed as desired, directly on the surface of the coating layer made of an ionizing radiation-curable resin, or on the surface of the thermoplastic resin layer when a thermoplastic resin layer is formed on the coating layer. The layer has good adhesiveness to the above-mentioned coating layer on which the colored printing layer is formed or the thermoplastic resin layer on the coating layer, is easy to form a dry film, and has a further coating property. It is formed by a printing ink that adheres to the surface of a molded body to be a transfer body and that contains as a vehicle a resin that is easily activated by an activator described later.

A specific example of this printing ink is to add a colorant such as paint or pigment to the above-mentioned vehicle, and further, for example, plasticity,
Known additives such as auxiliary drying agent, curing agent, thickening agent, dispersant, and filler are optionally added and sufficiently kneaded with a solvent, a diluent and the like.

The colored printing layer is, for example, a printing method such as an intaglio printing method, a lithographic printing method, a letterpress printing method, a screen printing method, a coating method such as a brush coating, a spatula coating, a spray coating, etc., a hand, It is formed by a known means such as a drawing method with a brush or the like, and is formed into an arbitrary shape such as a character, a figure, a symbol, or a pattern.

Further, directly on the surface of the coating layer made of the ionizing radiation-curable resin, or, when a thermoplastic resin layer is formed on the coating layer, on the thermoplastic resin layer surface on the coating layer, The metal vapor deposition layer, which is formed as desired through the above-mentioned colored printing layer, usually has an adhesive layer so as to cover the metal vapor deposition layer, and the adhesion of the adhesive layer A metal vapor deposition layer is transferred to the surface of a molded body that is a transfer target by force, but by utilizing the adhesive force of the resin component contained in the activator that activates the colored printing layer, There is also a case where the metal vapor deposition layer is transferred.

The metal vapor deposition layer is easily formed by vacuum vapor deposition of a metal such as Al, tin, silver, or copper, and generally has a thickness of about 400 to 600A.

Next, a method of using the hydraulic transfer sheet of the second invention will be described with reference to the drawings.

A method of using the hydraulic transfer sheet of the second invention is to form a curable resin layer on the outer surface of a molded article using the hydraulic transfer sheet of the first invention, and the first step is ,
The sheet 3 for hydraulic transfer in which the coating layer 1 made of an ionizing radiation-curable resin is formed on the sheet base 2 for hydraulic transfer made of a water-soluble or water-swellable film is used. 2 so that it faces downward (that is, the coating layer of sheet 3 is on the upper surface)
Float on the water.

When the hydraulic transfer sheet 3 has the colored printing layer 4, the first step of the method of using the hydraulic transfer sheet of the present invention is to float the transfer sheet 3 on the water surface, and then the sheet. The surface of the colored printing layer 4 of No. 3 is coated with an activator, or the surface of the colored printing layer 4 of the hydraulic transfer sheet 3 is coated with the activator and then floated on the water surface.

In this case, the activator applied to the surface of the colored print layer 4 contains a solvent that dissolves the colored print layer 4 of the transfer sheet 3, and the colored print layer 4 that is the transfer layer of the transfer sheet 3 is used. The coating layer 1 does not evaporate until the step of transferring to the surface of the molded body that is the transfer target is completed in water, and the surface of the molded body that is the transfer target is touched. It is desirable to contain a solvent having a property that does not occur.

Specific examples of such a solvent include pentane, hexane, heptane, octane, etc., or gasoline, petroleum, benzine, mineral spirits, which are liquid mixtures thereof.
Aliphatic hydrocarbons such as petroleum naphtha, aromatic hydrocarbons such as benzene, toluene, xylene, cyclohexane and ethylbenzene, halogenated hydrocarbons such as trichloroethylene, perchlorethylene, chloroform and carbon tetrachloride, methyl alcohol, Monohydric alcohols such as ethyl alcohol, propyl alcohol, butyl alcohol, amyl alcohol, benzyl alcohol, diacetone alcohol, polyhydric alcohols such as ethylene glycol, propylene glycol, glycerin, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, methyl Ketones such as cyclohexanone and isophorone, ethyl ether, isopropyl ether, ethylene glycol, mono-methyl ether, ethylene glycol mono-ethyl ether Ether, diethylene glycol
Mono-methyl ether, diethylene glycol mono-
Ethers such as ethyl ether, ethylene glycol mono-butyl ether, diethylene glycol di-butyl ether, ethylene glycol mono-methyl ether acetate, ethylene glycol mono-ethyl ether acetate, diethylene glycol mono-
Acetates such as methyl acetate, diethylene glycol / mono / ethyl ether / acetate, diethylene glycol / mono / butyl ether / acetate, esters such as butyrate, nitrohydrocarbons, nitriles, other acetals, acids, furans, etc. Used alone or as a mixed solvent.

As the activator, a resin soluble in the solvent in the activator, for example, vinyl chloride, a vinyl halide monomer such as vinylidene chloride, styrene and a derivative thereof,
Vinyl ester monomers such as vinyl acetate, allyl alcohol and allyl esters, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid or fumaric acid, ester derivatives of the above unsaturated carboxylic acids A nitrile derivative or an acid amide derivative thereof, an N-methylol derivative and an N-alkylmethylol ether derivative of an acid amide derivative of the above unsaturated carboxylic acids, glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether, vinyl isocyanate, allyl isocyanate, 2-hydroxyethyl-acrylate or -methacrylate, 2-hydroxypropyl-acrylate or -methacrylate, ethylene glycol-monoacrylate or -monomethacrylate, Chi glycol - diacrylate or - dimethacrylate, maleic anhydride, itaconic anhydride, methyl vinyl ketone, butadiene ethylene,
Thermoplastic resins such as propylene, dimethylaminoethyl methacrylate, vinyl pyridine, tert-butylaminoethyl methacrylate, homopolymers or copolymers of monomers such as monoallyl ethers of polyhydric alcohols,
Polyimide resin, polyester resin, phenol resin, melamine resin, urea resin, epoxy resin,
Thermosetting resins such as diallyl phthalate-based resins, silicon resins, polyurethane-based resins or modified resins or initial condensates thereof, natural resins, rosin and its derivatives, natural or synthetic rubbers, petroleum resins, and other resins are solvents. When an activator consisting of a swelling liquid added in an amount of about 5 to 60% by weight is used, the viscosity of the activator can be easily adjusted, and its application means is not limited. Since the ink holding time of the print pattern layer is long, there is an advantage that the transfer process can take a long time.

The activator may be applied by gravure coating, offset gravure coating, roll coating, bar coating, spray coating, ultrasonic coating, etc., and the activator coating amount is about ² to 30 g / m ² , preferably 3 to It is about 15 g / m ² .

In order to float the transfer sheet 3 on the water surface, it is possible to float the sheet-like materials one by one, or the roll-shaped material can be continuously floated on the water surface while flowing water in one direction.

In this step, the hydraulic transfer sheet base material 2 of the transfer sheet 3 is floated on the water surface so as to face downward. At this time, the water-soluble or water-swellable film 2 of the transfer sheet 3 and the water surface are It is necessary to prevent bubbles from entering in between and to prevent the transfer sheet 3 from wrinkling.

In the second step of the method of using the hydraulic transfer sheet, the molded body 5 as the transferred body is lowered from above the transfer sheet 3 on the water surface in the first step in the direction of the arrow, and part or all of it is settled in water. Then, the transfer sheet 3 is extended along the surface shape of the transfer target so that air bubbles do not enter between the transfer sheet 3 and the transfer target 5, and is brought into close contact with the transfer target 5 by hydraulic pressure.

In addition, when the transfer sheet 3 is floated, water is adjusted to an appropriate temperature depending on the properties of the water-soluble or water-swellable film 2 that constitutes the transfer sheet 3. For example, when a starch-based film (trade name: wafer) is used as the water-soluble film, the water temperature is preferably about 40 to 50 ° C., and amylase or the like is added to accelerate the dissolution when the film is removed. It is preferable to add about 2 to 4%.

The transfer layer in the hydraulic transfer sheet 3, that is, all layers other than the water-soluble or water-swellable film 2 are formed into the molded body 5.
After sufficiently adhering to the surface of, the third step of removing the water-soluble or water-swellable film 2 in the transfer sheet 3 is performed.

In order to remove the water-soluble or water-swellable film 2 on the transfer sheet 3, it is the most efficient and preferable method to wash the transfer target with a shower using water.

As a result, the attached film 2 can be completely removed, and stains generated during transfer can be washed.

The water temperature at this time varies depending on the material of the water-soluble or water-swellable film used, etc., but generally 15 to 60 ° C. is suitable, and the washing time is about 1 to 10 minutes.

In the subsequent fourth step, the coating layer of uncured resin fixed to the surface of the molded body is irradiated with ionizing radiation to form a curable resin layer.

As the electron beam in the irradiation of ionizing radiation, Cockloft-Walton type, Van de Graaff type, resonance transformer type,
50-1000 Ke emitted from various electron beam accelerators such as insulation core transformer type, linear type, dynamitron type, high frequency type
An electron beam with an energy of V, preferably in the range 100 to 300 KeV, is used.

Further, as the ultraviolet rays, ultraviolet rays from an ultraviolet ray source using a light source such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc and a metal halide lamp are used.

[Examples] Hereinafter, specific configurations of the hydraulic transfer sheet and the method of using the same of the present invention will be described based on Examples.

Hydrostatic transfer sheet MEK is coated with an acrylate-based resin [Mitsubishi Yuka Fine Co., Ltd .: "Yupimer LZ"] on one side of a hydraulic transfer sheet base material consisting of a 40μ thick polyvinyl alcohol resin film.
A coating agent having a solid content of 40% by weight dissolved in is applied by a roll coater method and further dried by hot air at 100 ° C to form an ionizing radiation curable resin [radical-polymerizable unsaturated resin] consisting of a dry film with a thickness of 5μ. A resin having a base and a melting point of 120 ° C.] was formed.

Next, a colored printing layer having an abstract pattern is formed on the surface of the insulating coating layer with a printing ink [KLCF, manufactured by Morohoshi Ink Co., Ltd.], dried, and then wound up by a winding roller, and a water pressure transfer sheet [i ] Was obtained.

Method for Using Hydrostatic Transfer Sheet After cutting the obtained hydraulic transfer sheet [i] into individual sheets, an activator comprising a mixed solvent of butyl carbitol acetate and butyl cellosolve on the colored printing layer surface of the sheet [i] [Morosei Ink Co., Ltd .: "CF Primer"] was applied, and then floated on the water surface at a water temperature of 30 ° C with the colored print layer surface of the transfer sheet [i] facing upward, and after 1 minute. A container lid made of an ABS resin, which is a transfer target, was pushed in from above, and the transfer sheet [i] was spread and brought into close contact with the surface of the molded body.

Next, the transfer sheet [i] is spread from the water on the surface,
Pull out the adhered molded body, soak it in warm water at 40 ° C for 30 minutes, and shower with clear water to remove the polyvinyl alcohol resin film on the transfer sheet [i] and further dry it to cure the surface with ionizing radiation. A molded body to which the coating layer of the mold resin and the colored printing layer were attached was obtained.

Further, this molded body is passed under a high pressure mercury lamp with an output of 80 W / cm ozone so that the coating layer of the ionizing radiation-curable resin in the molded body becomes the irradiation surface, and the ionizing radiation for 10 seconds is passed. Was irradiated to cure the coating layer.

When the curable resin layer in the obtained molded body was rubbed with steel wool # 0000, no scratch was generated on the surface.

[Operation and Effect] In the sheet for hydraulic transfer of the present invention, a sheet base material for hydraulic transfer comprising a water-soluble or water-swellable film has a polymer having a glass transition temperature of 0 to 250 ° C. on one surface of the sheet base material. Consisting of a compound having a radically polymerizable unsaturated group and / or a compound having a melting point of 20 to 250 ° C. and having a radically polymerizable unsaturated group, in an uncured state, solid at room temperature and non-adhesive It is characterized by having a coating layer.

Therefore, by carrying out hydraulic transfer to various molded articles using the transfer sheet of the present invention, a curable resin layer by a transfer method can be formed on the surface of a desired molded article.
For example, there is no complication of the process and the occurrence of coating spots such as in the case of forming a curable resin layer by a coating means, and a transfer sheet is used for a curved surface as in the case of a transfer method using a press plate or a roll press. It is possible to form a curable resin layer with good quality without causing insufficient adhesion.

The coating layer made of the ionizing radiation-curable resin in the hydraulic transfer sheet of the present invention has a glass transition temperature of 0 to 250 ° C.
Of the polymer having a radically polymerizable unsaturated group and / or a compound having a melting point of 20 to 250 ° C. and having a radically polymerizable unsaturated group, and is in an uncured state and is solid at room temperature and non-adhesive Since it is composed of a flexible coating layer, it can be rolled up after the coating layer is coated, which is convenient in terms of handling.

The method for using the sheet for hydraulic transfer of the present invention is that the sheet for hydraulic transfer of the present invention, that is, the glass transition temperature is 0 to 250 ° C.
Of the polymer having a radically polymerizable unsaturated group and / or a compound having a melting point of 20 to 250 ° C. and having a radically polymerizable unsaturated group, and is in an uncured state and is solid at room temperature and non-adhesive Of a water-soluble or water-swellable film having a water-soluble or water-swellable film having a water-soluble coating layer, floating on the water surface so that the water-soluble or water-swellable film of the water pressure transfer sheet faces downward, and curing By pressing the molded body forming the mold resin layer from the upper surface, the hydraulic transfer sheet is hydraulically spread and adhered to the outer surface of the molded body, and the coating layer in the hydraulic transfer sheet is placed outside the molded body. Transferring to the surface,
A step of obtaining a molded article having a coating layer attached to the surface by removing the water-soluble or water-swellable film in the hydraulic transfer sheet, and ionizing radiation to the coating layer attached to the surface of the molded article. Is applied to cure the coating layer.

Therefore, in the method of using the hydraulic transfer sheet according to the second aspect of the present invention, a curable resin layer is formed on a desired surface of various molded articles by a transfer means using hydraulic pressure. There is no unevenness in the quality of the curable resin layer due to the complexity of the process and coating spots such as in the case of forming the curable resin layer, and also for curved surfaces like in the transfer method by a press plate or roll press. Since there is no such thing as insufficient adhesion of the transfer sheet,
A curable resin layer having good quality can be formed on a desired surface of the molded body regardless of the shape of the molded body.

Further, in the method of using the hydraulic transfer sheet according to the second aspect of the present invention, by using the hydraulic transfer sheet provided with a desired colored printing layer on the surface, it is possible to simultaneously transfer the pattern. As a result, a transfer pattern whose surface is protected by the curable resin layer can be easily and surely obtained.

[Brief description of drawings]

The figure is a schematic cross-sectional view illustrating an intermediate step of the method of using the hydraulic transfer sheet of the present invention. 1: Coating layer made of ionizing radiation curable resin, 2: Water transfer sheet base made of water-soluble or water-swellable film, 3: Water pressure transfer sheet, 4: Colored printing layer, 5: Molded body (transferred body).

Claims (5)

[Claims] 1. A sheet material for hydraulic transfer, comprising a water-soluble or water-swellable film, on one surface of the sheet substrate,
Compound having a radically polymerizable unsaturated group in a polymer having a glass transition temperature of 0 to 250 ° C. and / or a melting point of 20 to 250
A hydraulic transfer sheet comprising a compound having a radical-polymerizable unsaturated group and having a non-adhesive coating layer that is in an uncured state and is solid at room temperature. 2. The hydraulic transfer sheet according to claim 1, wherein the coating layer contains a colorant. 3. The hydraulic transfer sheet according to claim 1 or 2, wherein the surface of the coating layer is covered with a thermoplastic resin layer. 4. The hydraulic transfer sheet according to claim 3, wherein the thermoplastic resin layer is a resin layer having a colored printing layer, a metal vapor deposition layer, or both on the surface thereof. 5. A compound having a radical polymerizable unsaturated group in a polymer having a glass transition temperature of 0 to 250 ° C. and / or a compound having a melting point of 20 to 250 ° C. and having a radical polymerizable unsaturated group, In a cured state, a water-based transfer sheet comprising a water-soluble or water-swellable film which is solid at room temperature and has a non-adhesive coating layer, and the water-soluble or water-swellable film in the water pressure transfer sheet is After being floated on the water surface so as to face downward, by pushing the molded body from the upper surface, the hydraulic transfer sheet is spread and adhered to the outer surface of the molded body by water pressure, and the coating layer of the hydraulic transfer sheet is applied. Is transferred to the outer surface of the above-mentioned molded product, then the water-soluble or water-swellable film in the hydraulic transfer sheet is removed, and the transferred coating layer is irradiated with ionizing radiation. And, the use of hydraulic transfer sheet characterized by curing the coating coating layer.