JPS63287577A - Transfer sheet and method for transferring - Google Patents

Abstract

PURPOSE:To widen the selection range of the material for an antifogging layer and to facilitate the application to an intricate surface by laminating the antifogging layer consisting of a polymer and a hydrophilic monomer on a releasable sheet to form the title transfer sheet. CONSTITUTION:The antifogging layer contg. 100pts.wt. polymer and 5-300pts.wt. hydrophilic monomer and consisting of a composition capable of being cross- linked by an electron beam is laminated on the releasable sheet to form a transfer sheet. In addition, 1-200pts.wt. surfactant can be preferably incorporated in the antifogging layer. Consequently, the antifogging layer 2, a patterned layer 3, a vapor-deposited layer 4, and an adhesive layer 5 are laminated on the releasable sheet 1 to form the transfer sheet. When any pattern is not required in the transfer layer and the antifogging layer has sufficient adhesive strength, the patterned layer 3, vapor-deposited layer 4, and adhesive layer 5 can be omitted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a transfer sheet J3 for transferring an image having an anti-fogging effect onto the surface of an article made of plastic, glass, etc.
and a transfer method.

[Prior Art] Conventionally, methods for imparting an anti-fog effect to the surface of an article include (a) a method of applying an anti-fog paint, (b) a method of laminating an anti-fog sheet at the same time as molding, and (c) a method of laminating an anti-fog sheet at the same time as molding. There is a method of laminating antifogging sheets using an adhesive or pressure-sensitive adhesive.

[Problems to be solved by the invention] However, in the method (a) above, anti-fogging properties are imparted to the already completed article in post-processing, and in reality, each process of painting and drying is required. In addition, there are problems with solvent recovery and processing costs are high. Furthermore, it also has the disadvantage that foreign matter tends to adhere to it during painting.

In addition, in the method (b) above, when applied to products with complex shapes, the sheet material is limited in terms of formability.
It is not always possible to make the physical properties of the final product satisfactory. For example, there are problems such as a decrease in moisture resistance and a loss of transparency when used for mirrors and the like. Furthermore, the method (c) above has the problem that, like the method (a), it requires post-processing and cannot be applied to articles with complex shapes.

In view of the above-mentioned problems, the purpose of the present invention is to solve the problems of the prior art described above, namely, the inability to impart antifogging properties at the same time as molding, and the ability to apply to complex-shaped surfaces without deteriorating the physical properties of the final product. This is an attempt to resolve things that could not be done.

[Means for solving the problem 1' In the present invention, a layer that provides antifogging properties by crosslinking by irradiation with an electron beam (antifogging layer)
By using a transfer sheet having this, it has become possible to eliminate the drawbacks that could not be overcome with the above-mentioned conventional techniques.

That is, the transfer sheet of the present invention has a release sheet and a transfer layer, the transfer layer has an anti-fog layer on the side of the release sheet, and the anti-fog layer is made of a polymer and a hydrophilic monomer. It is characterized by being configured.

Further, the transfer method of the present invention is characterized in that a transfer sheet having an antifogging layer on the side of the releasable sheet is used to transfer the image to the object to be transferred.

The transfer sheet of the present invention is most simply one in which an anti-fog layer is formed on the release surface of a release sheet, but if necessary, a pattern layer, a metal evaporator layer and a contact layer are formed on the anti-fog layer. Other layers such as decoys can be formed.

Release sheet The material for the release sheet may be, in principle, any material used for this type of transfer sheet, and its thickness is usually preferably from 5 to 200 μm, more preferably from 12 to 50 μm.
It is μm.

Specific examples include films of synthetic resins such as polyethylene terephthalate (so-called polyester), polypropylene, polyethylene, and polyamide, paper, and synthetic paper. These can be laminated and used if necessary.

The unevenness on the surface of the release sheet determines the unevenness on the surface of the antifogging layer when it is transferred. If it is desired that the surface after transfer be a mirror surface, the surface of these release sheets must be made mirror-like. In addition, since a matte surface is often required for decorative purposes, in that case, a matte film with a gloss level of #A is used as a release sheet by kneading a matting agent, sandblasting, or chemical etching. It is better.

The releasable sheet may be made of materials other than those mentioned above, and may also be one having a releasable layer laminated thereon to make the surface releasable. This releasable layer has a component that enables the antifogging layer to be peeled off from the base sheet of the transfer sheet during transfer. (same as the vehicle described below) alone or, if necessary, with the addition of a releasing substance such as wax or silicone.

Antifogging layer The antifogging layer is made of a polymer crosslinked with a hydrophilic monomer and optionally containing a surfactant, and can be crosslinked by electron beam irradiation.

As a specific combination, (a) Polymer ten hydrophilic monomers.

(b) Polymer 10 hydrophilic 7mer 10 surfactant, (c)
Polymer (1) Hydrophilic monomer (1) Crosslinkable monomer (2) Polymer (1) Hydrophilic monomer (10) Resistant monomer (10) Surfactant (e) Polymer (10) Hydrophilic crosslinkable monomer (5) Polymer (10) Hydrophilic crosslinkable monomer (1) Interface (g) polymer, hydrophilic monomer, hydrophilic crosslinking monomer, and (h) polymer, hydrophilic monomer, hydrophilic crosslinking monomer, and surfactant. In all of the above combinations, the polymer can be either functional or non-functional.

As the non-functional polymer, polyacrylic acid alkyl ester, polymethacrylic acid alkyl ester, polyurethane, polyester, polyamide, polyvinyl acetate, polyvinyl chloride, polystyrene, polyacrylonitrile, polyvinylpyrrolidone, etc. can be used.

A hydrophilic group may be introduced into the non-functional polymer in advance to improve compatibility with the hydrophilic monomer. This is followed by a copolymer of a hydrophilic monomer (f! aqueous monomer) and a hydrophobic monomer, which will be described later. The proportion of the hydrophilic monomer to the polymer is 50 mol% or less,
If it exceeds this, the water resistance of the resulting film will decrease.

Furthermore, derivatives of polyvinyl alcohol such as partially saponified polyvinyl alcohol, polyvinyl butyral, and polyvinyl acetal, and cellulose derivatives such as nitrocellulose, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, and hydroxypropyl cellulose can also be used. .

On the other hand, a functional polymer is a polymer having a functional group that causes a crosslinking reaction by ionizing radiation, and examples of the functional group include the following.

Acryloyl group -OC-C= CH2Cto13 Methacryloyl group -QC-C=CH2 Allyl group -CIl -CIl=CH2 Epoxy group -CH-CH2 The functional group is present at a ratio of one in every polymer molecule ffi 300 to 10,000. Desirably, if the ratio is less than 1 per 10,000 molecules fi, there will be almost no crosslinking effect due to the functional group, and if the ratio exceeds 1 per 300 molecules fi, the crosslinking density will continue to increase.

Examples of functional polymers include urethane acrylate, polyester acrylate, epoxy acrylate, etc., and copolymers of alkylnisder acrylate and 2-hydroxyethyl acrylate. A copolymer in which an acryloyl group is introduced by attaching a 1=1 adduct of isocyanate to 7+0, a copolymer in which glycidyl methacrylate is added to the carboxyl group of a copolymer of alkylnisder acrylate and acrylic acid, Polyvinyl butyral with a 1:1 adduct of acrylic acid chloride or 2-hydroxyethyl acrylate and diisocyanate added to the remaining hydroxyl groups can be used.

The above-mentioned polymer may be in the form of an oligomer, but from the viewpoint of film-forming properties, the molecular weight is preferably from 1,000 to 300,000 (weight average).

Hydrophilic monomers include water M group, carboxyl group (metal salt),
Amide group, imide group, sulfone group, ammonium base,
A monomer containing a hydrophilic group such as a phosphoric acid group, such as 2-hydroxyethyl acrylate, methacrylate! l!
2-hydroxyethyl, acrylic B2-hydroxypropyl, 2-hydroxypropyl methacrylate, acrylic acid, methacrylic acid, metal acrylate, metal methacrylate, acrylamide, methacrylamide, dimethylaminopropylacrylamide, dimethylaminopropylmethacrylamide, N-acryloylmorpholine, N
-methacryloylmorpholine, N-methylolacrylamide, N-methylolmethacrylamide, t-butylacrylamide, t-butylmethacrylamide, N-
Methoxymethylacrylamide, N-ethoxymethylacrylamide, N-n-butoxyacrylamide, N,
N-dimethylacrylamide, N,N-dimethylaminopropylacrylamide, N,N-dimethylaminopropylmethacrylamide, polyethylene glycol monomethacrylate, polypropylene glycol monomethacrylate, glycerol monomethacrylate, 2-acrylamide 2-methylpropanesulfonic acid, methacrylamide Examples include propyltrimethylammonium chloride, methacryloyloxyethyltrimethylammonium chloride, and mono(2-methacryloyloxyethyl) acid phosphate.

The crosslinkable monomer is a heptamer having two or more groups that easily become radicals by electron beam irradiation, such as an acryloyl group, a methacryloyl group, an allyl group, or an epoxy group, and crosslinks with both the backbone polymer and the hydrophilic monomer. Therefore, the crosslinking density of the entire membrane is improved, the stiffness is increased, and unreacted hydrophilic monomers are prevented from remaining.

Such crosslinking monomers include ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, 1,6-hexanediol dimethacrylate, glycidyl methacrylate, neopentyl glycol dimethacrylate, tetraethylene glycol dimethacrylate, 2.2-bis[4-( acryloxyjetoxy)
phenyl]propane, 2,2-bis[4-(methacryloxyjethoxy)phenyl)propane, 2,2-bis[
4-(acryloxypolyethoxy)phenyl]propane, 2.2-bis[4-(methacryloxypolyethoxy)
Examples include bifunctional monomers such as phenyl]propane, trifunctional monomers such as trimethylolpropane trimethacrylate, and polyfunctional monomers such as tetramethylolmethanetetraacrylate and dipentaerythritol hexaacrylate.

Hydrophilic crosslinking monomers include hydroxyl groups, carboxyl groups (metal salts), amide groups, imide groups, sulfonic acid groups (metal salts),
It is a monomer having a hydrophilic group such as an ammonium base or a phosphoric acid group and two or more crosslinkable functional groups that easily become radicals by electron beam irradiation, such as an acryloyl group, a methacryloyl group, an allyl group, or an epoxy group.

Examples of such hydrophilic crosslinkable monomers include those having water MW such as glycerol di(meth)acrylate and glycerol methacrylate acrylate, ethylene glycol, diglycidyl ether di(meth)acrylate, and polyethylene glycol diglycidyl ether di( meth)acrylate, polypropylene glycol diglycidyl ether di(meth)acrylate, neopentyl glycol diglycidyl ether di(meth)
1:2 of diol/diglycidyl ether such as acrylate, glycerin diglycidyl ether di(meth)acrylate, bisphenol A diglycidyl ether di(meth)acrylate, trimethylolpropane triglycidyl ether di(meth)acrylate and acrylic acid.
Adducts, pentaerythritol mono(meth)acrylate, pentaerythritol di(meth)acrylate, pentaerythritol tri(meth)acrylate, dipentaerythritol mono(meth)acrylate, dipentaerythritol di(meth)acrylate, dipentaerythritol mono( meth)acrylate, dipentaerythritol tetra(meth)acrylate, pentaerythritol derivatives such as dipentaerythritol penta(meth)acrylate, methylenebis(meth)acrylamide, acrylamide/glyoxal adduct, acrylamide/methylethylene urea condensate, 1.3, 5-Triacryloylhexahydro-s-triazine, N.

N-diallylacrylamide, acrylamide/methylolmelamine condensate, acrylamide/methyloltriazone condensate, acrylamide/methylolhydantoin condensate, acrylamide/methylolurea, N,N-
Examples include acrylamide derivatives such as diallylacrylamide.

The antifogging layer of the present invention can also contain a surfactant. The surfactant has the effect of imparting antifogging properties by gradually exuding from the hydrophilic film to the surface.

Any anionic, nonionic, or cationic surfactant may be used as long as it has good compatibility with the composition comprising the above-mentioned components constituting the antifogging layer.

Examples of anionic surfactants include fatty acid salts, alkyl sulfate ester salts, alkylbenzene sulfonates, alkylnaphthalene sulfonates, dialkyl sulfosuccinate ester salts, alkyl phosphate ester salts, naphthalene sulfonic acid-formalin condensates, and polyoxyethylene. There are alkyl sulfate ester salts, etc. Nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkylphenol ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene Examples include alkylamines, glycerin fatty acid esters, oxyethylene-oxypropylene block polymers, and cationic surfactants such as realkylamines and quaternary ammonium salts.

When forming the antifogging layer of the present invention, the hydrophilic monomer is added in an amount of 5 to 300 parts by weight per 100 parts by weight of the polymer. 5
If it is less than 300 parts by weight, sufficient hydrophilicity will not be imparted;
If the amount exceeds 1 part by weight, the water resistance of the membrane decreases.

The preferred content of hydrophilic monomer is 20 to 250 parts by weight.

The amount of crosslinking monomer is 1 to 300 per 100 parts by weight of polymer.
It is a heavy duty club. If it is less than 1 part by weight, crosslinking of unreacted hydrophilic monomers will be insufficient, and if it exceeds 300 parts by weight, the crosslinking density of the entire membrane will be too high. Especially when the polymer has no functional groups, the content of crosslinking monomers is between 5 and
It is preferably 300 parts by weight, more preferably 5 to 200 parts by weight. Further, when the polymer has a functional group, the content of the crosslinkable monomer is preferably 1 to 200 parts by weight, more preferably 5 to 100 parts by weight.

Hydrophilic crosslinking monomer per 100 parts by weight of polymer
~200 parts by weight. If the amount of polymer is less than 100 parts by weight, sufficient hydrophilicity and crosslinking properties will not be imparted; [
! If it exceeds the bearing part, the water resistance of the membrane decreases and the crosslinking density becomes too high. The preferred content of the hydrophilic crosslinking monomer is 1 to 100 parts by weight.

When a surfactant is added, the amount is 200 parts by weight or less per hanging part of the polymer 100. If it exceeds 200 parts by weight, too much surfactant leaches out. The preferred content is 1 to 100 parts by weight.

When forming an antifogging layer, the composition consisting of a suitable combination of the above components may contain a solvent as appropriate. The solvent not only adjusts the fluidity of the composition, but also has the effect of floating the hydrophilic monomer onto the release surface of the coating film, and is therefore preferred in forming the antifogging layer of the present invention. Solvents that can be used include methanol, ethanol, isopropanol,
Alcohols such as methyl cellosolve and ethyl cellosolve, ethers such as tetrahydrofuran, ketones such as methyl ethyl ketone, acetone and methyl isobutyl ketone, esters such as ethyl acetate and butyl acetate, toluene,
Examples include aromatic hydrocarbons such as xylene, or mixed solvents thereof. The amount of solvent added varies depending on the film formation method, but when forming a coating film by coating, the solid content in the composition is 5 to 50% by weight, preferably 5 to 30% by weight. Generally, the amount of solvent added is eooo parts or less per 100 parts by weight of polymer.

An antifogging layer can be formed by the following method using a composition consisting of the above components.

First, a composition adjusted to an appropriate viscosity is applied onto the release surface of a release sheet by a roll coating method such as a gravure reverse method, a Miki reverse method, a gravure direct method, or a four-pole reverse method. The coating film of the composition formed on the release sheet is dried while being heated with a dryer or the like in order to evaporate and remove the solvent. If the heating temperature is not high, the monomers will also evaporate, so the R height is set to about 140°C.

In the antifogging layer of the present invention formed as described above, an antifogging layer is obtained which has hydrophilicity on the transfer surface and is supported by a polymer skeleton portion having water resistance, mechanical strength, and the like.

The antifogging layer can be irradiated with electron beams either before or after the transfer. As the irradiation method, any method such as an electron curtain method or a beam scanning method can be used. By irradiation with electron beams, polymers with or without functional groups can be crosslinked, and the monomers crosslink to the polymer in the form of graft or block polymerization. This point is markedly different from crosslinking by ultraviolet irradiation. The energy of the irradiated electron beam is 150 to 200
keV, and the light Q45 varies depending on the composition of the composition, the desired degree of crosslinking density, etc. The more functional groups there are in the polymer, and the more crosslinkable polymers there are, the less irradiation is required, and the higher the crosslinking density, the more it is necessary to increase the amount of irradiation.

In particular, when a surfactant is contained, if the crosslinking density is too high, its exudation will be insufficient and the antifogging effect will be reduced, so controlling the irradiation amount is important.

From the above, the irradiation dose is generally 0.5 to 20M rad.
If it is less than 0.5 M rad, unreacted monomers may remain, and if it exceeds 20 M rad, the crosslink density becomes too high.

The antifogging layer thus created has a unique structure in which the polymer skeleton is crosslinked with a hydrophilic monomer and the hydrophilic groups of the hydrophilic monomer are concentrated on the layer surface. Therefore, it has good antifogging properties.

Since the entire upper layer is crosslinked, it has sufficient hardness and strength.

Because of the hydrophilic groups present on the surface, it has excellent heat resistance, especially in applications where water vapor is exposed to light for a short period of time. Therefore, it is not particularly necessary to contain a surfactant in those used for such purposes.

On the other hand, for those used in applications where they are exposed to water vapor for a long period of time, it is necessary to contain a surfactant. In this case, the hydrophilic groups on the surface exhibit initial antifogging properties, and the surfactant present in the layer oozes out to the surface due to moisture adhering to the layer surface, thereby exhibiting long-term antifogging properties. Here, since the antifogging layer of the present invention is crosslinked, the surfactant leaches out gradually, and the antifogging property can be maintained for a very long period of time. Furthermore, by changing the electron beam irradiation conditions, the crosslinking density can be adjusted to control the exudation rate of the surfactant.

As mentioned above, crosslinking of the antifogging layer by electron beam irradiation can be performed either before or after transfer. Particularly when electron beam irradiation is performed after transfer, the antifogging layer of the transfer sheet will contain 7-mer, so it is necessary to use one with a large molecular weight to prevent volatilization. Alternatively, a small amount of electron beam irradiation may be performed before transfer, and full-scale irradiation may be performed after transfer. It is also possible to slightly polymerize the hexamer to form an oligomer.

The thickness of the anti-fog layer is 2 to 100 μm, preferably 5 to 20 μm.
It is m.

The structure of the transfer sheet is basically as described above,
Furthermore, the following layers can be provided as necessary.

Adhesive layer Even if an uncured anti-fog layer is applied to the object to be transferred and transferred, a certain level of adhesive strength can be obtained, but if further improvement in adhesive strength is required, an adhesive layer is provided as a separate layer. Good.

Known adhesives can be used for WWW contact, such as rubber resins such as polyisoprene rubber, polyisobutyl rubber, styrene-butadiene rubber, butadiene-acrylonitrile rubber, (meth)acrylic acid ester resin, polyacetic acid ester resin, etc. Any adhesive such as vinyl resin, vinyl chloride-vinyl acetate copolymer resin, polystyrene resin, polyester resin, polyamide resin, polychlorinated olefin resin, polyvinyl butyral resin can be used.

These resins are diluted as necessary to obtain a viscosity suitable for coating, and then subjected to known coating methods such as reverse roll coating, roll coating, gravure coating, kiss coating, plate coating,
Coat using smooth coating, etc.

In the transfer sheet of the present invention, the method for providing other layers is generally the same, but a printing method can also be used when providing the layers in a pattern.

Pattern Layer The pattern layer is for imparting a pattern to the transfer target by transfer, and is therefore absolutely necessary in a pattern transfer sheet whose purpose is to transfer a pattern. If a pattern layer is not required, it is sufficient to simply transfer only the antifogging layer. The pattern layer is normally provided directly on the anti-fog layer or indirectly through another phase, and the type of ink may be determined in consideration of the application and the V4 structure of the transfer sheet. Ordinary inks are prepared by kneading a vehicle with colorants such as pigments or dyes, plasticizers, stabilizers, other additives, or solvents or diluents.

Among the components of the ink, binders related to adhesion include homopolymers of acrylic or methacrylic monomers such as polymethyl methacrylate, polyethyl methacrylate, polyethyl acrylate, and polybutyl acrylate, or copolymers of these monomers. Preferably, one or more alcohol-free F8 resins are selected, such as styrene resins such as copolymers containing polystyrene and polyα-styrene, styrene copolymer resins, cellulose acetate, vinyl chloride, and polyester resins. use.

Metal thin film layer In order to give a metallic appearance to the surface of the object to be transferred, a metal: aII! is used instead of or in combination with a normal pattern layer. i! Layers can also be provided. The wood used to make the metal thin film layer is aluminum, chromium, tin, silver, copper,
There are gold, etc., and the thickness is usually about 400 to 600 people. The metal thin film layer can be formed so as to cover the entire surface of the antifogging layer, and can be formed into a pattern if necessary. Such gold filaments can be formed by vapor deposition, plating, sputtering, coating, etc. In addition, to create a pattern, apply metal 1JIIW after creating a water-soluble pattern.
It can be formed by a method in which water is subsequently applied, or a method in which a gold B thin film is first provided, a resist pattern is provided, and then an acid or alkali is applied.

Transfer method Transfer methods using a transfer sheet include, for example, a thermal transfer method in which an anti-fog layer (in some cases, a pattern layer and an alternating layer having other layers) is bonded to a non-transfer body by heat and pressure using a roll press or a flat press, and a vacuum transfer method.・There are transfer methods using pressure molding, and solvent-activated transfer methods in which an activation liquid consisting of a solvent or a resin solvent solution is interposed between the transfer sheet and the object to be transferred, etc., but the transfer method used in the present invention A particularly interesting method is a method in which transfer is performed using heat and pressure during molding onto plastic molded products molded by various methods. Examples of such methods include molding methods such as injection molding, extrusion molding, and calendar molding.

For example, in the injection molding method, a transfer sheet is placed in a mold, and the transfer layer and the injected resin are fused and integrated.

In extrusion molding and calendar molding, the molded product is immediately heat-sealed when it comes out.

After the transfer, press molding, vacuum molding, pressure molding, vacuum pressure molding, etc. may be performed as necessary to obtain a predetermined shape.

Various objects can be used as objects to be transferred in this invention, and examples include the following.

(b) AASl11 pilgrimage, ABStl fat, AC8 resin, amine resin, cellulose resin such as cellulose acetate, cellulose butyrate, and ethyl cellulose, allyl resin, ethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-chloride Vinyl copolymer, ionomer resin, MBS resin, methacrylic-styrene copolymer, nitrile resin, phenol resin, polyamide resin, polyarylate resin, polycarbonate resin, polybutadiene resin, polybutylene terephthalate resin, polyethylene resin, polyethylene terephthalate resin, poly Plastic molded products such as methyl methacrylate resin, polypropylene resin, polyphenylene oxide resin, polystyrene resin, As resin, polyurethane resin, polyvinyl chloride resin, acrylic modified polyvinyl chloride resin, and unsaturated polyester resin.

(b) Extruded metal products such as iron, aluminum, shells, and stainless steel.

The transfer surface of these transfer objects may be subjected to pretreatment depending on the material of the transfer object surface, for example.
Pre-treatments to improve adhesion such as brimer treatment and corona treatment;
This includes adjusting the base color by painting and other methods.

[Function] According to the present invention, the anti-fog layer can be configured as a transfer layer of a transfer sheet, and the transfer sheet can be used for transfer. You can use the material of your choice. In addition, since the anti-fog layer of Transfer N is supported by the release sheet of the transfer sheet,
In addition to being very easy to handle, the transfer layer can be made thin. Therefore, it becomes easy to transfer the image to a target object having a shape of II.

[Example] A preferred example of the transfer sheet of the present invention is shown in FIG. 1 is a release sheet, 2 is an antifogging layer, 3 is a pattern layer, 4 is a vapor deposition layer, and 5 is an adhesive layer. If the transfer layer does not require a pattern and the antifogging layer has sufficient adhesive strength, pattern layer 3 is vapor-deposited! [4 and adhesive H5 can be omitted.

Next, the present invention will be explained in more detail using specific examples.

Examples 1 to 9 A polyester film (manufactured by Toshi@, Lumirror T-60, thickness 38 μm) was used as a releasable film, and on one side of the film, w7U film having the composition shown in Table 1 below was coated with a roll coater. It was applied and dried with a dryer to form an antifogging layer with a thickness of 5 μm. Next, the electron curtain type [B
An electron beam of 175 eV was applied to 58 eV using a device (made by ESI).
It was irradiated with rad and cured.

Note that the acrylic polymer solution was prepared according to the following procedure. That is, 1 part by weight of methyl methacrylate 7001ff, 390 parts by weight of 2-hydroxyethyl methacrylate, 1.5 parts by weight of azobisisobutyronitrile, and 2210 parts by weight of Methyl Celsolve were equipped with a reflux tube and a stirrer, and nitrogen The mixture was placed in a replaceable separable flask and reacted for 5 hours at 85°C in a N2 stream. Thereafter, 1.51 parts of azobisisobutyronitrile was further added, and the mixture was reacted for 3 hours. The resulting acrylic polymer solution had a concentration of 33% by weight and was analyzed by gel permeation chromatography <ap
c>, f! Hanging average molecule fi (M
W) was 7.5 x 10'. Moreover, no monomer peak was observed.

Further, an acrylic heat-sensitive adhesive layer was applied thereon to a dry thickness of 2 μm to form a transfer sheet.

Transfer method■ ■Using a die-type extrusion grip, extrude a polycarbonate resin plate, and immediately after extruding from the die, press the transfer sheet with a roll so that the heat-sensitive adhesive layer is in contact with the polycarbonate resin side, and then Cooled using a cooling roll. After cooling, it was cut into a desired size, and then the release sheet was peeled off.

The antifogging property of the polycarbonate plate thus obtained was evaluated by the following test.

(1) Water contact angle test.

(2) Breath test (to check whether cloudiness occurs with exhaled breath). Cloudy occurrence:
After 1 minute, exhale and check whether cloudiness occurs.)
.

(4) 60°C sea air test (examine whether clouding occurs by exposing the film to steam at 60°C).

In the tests (3) and (4) above, the results are shown in Table 2 below.

As shown in Table 2 and above, the antifogging layer transferred by the transfer sheet of the present invention exhibited good antifogging properties.

and i5 Uni-transfer method■ Place the transfer sheet obtained in Example 1 in the mold of an injection molding machine, and perform injection molding so that the injected resin hits the heat-sensitive adhesive layer side. After that, the releasable sheet was peeled off.

The acrylic plate thus obtained exhibited good antifogging properties and had extremely high productivity.

Example 11 Transfer Method ■ The transfer sheet of Example 1 was placed on a transparent acrylic resin plate, and a transfer process was performed using a rubber roll heated to 200° C., and then the release sheet was peeled off.

The acrylic plate thus obtained exhibited good antifogging properties and was extremely suitable for mass production.

[Effects of the Invention] According to the present invention, by using a transfer sheet in which an antifogging layer is formed as a transfer layer, it is sufficient to simply perform thermal transfer to form an antifogging layer on an article. In addition, compared to the conventional method of using an anti-fog sheet, there is no problem in applying it to the surface of objects with complex shapes, and even if a normal release sheet is used, the transfer layer (/ The wide selection of materials for antifogging layers makes it easy to apply to surfaces with complex shapes.

Furthermore, if the transfer is performed at the same time as the molding, there is an advantage that the process can be shortened.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a transfer sheet according to an embodiment of the present invention. 1... Release sheet 2... Anti-fog layer 3... Pattern layer 4... Steamed layer 5... Adhesive layer

Claims (13)

[Claims] (1) In a transfer sheet having a release sheet and a transfer layer, the transfer layer has an anti-fog layer on the side of the release sheet, and the anti-fog layer is composed of a polymer and a hydrophilic monomer. A transfer sheet characterized by: (2) In the transfer sheet according to claim 1, the antifogging layer contains 100 parts by weight of a polymer and 5 to 300 parts by weight of a polymer.
1. A transfer sheet comprising a composition that can be crosslinked by an electron beam and contains a hydrophilic monomer in an amount by weight of a hydrophilic monomer. (3) The transfer sheet according to claim 2, wherein the antifogging layer contains 1 to 200 parts by weight of a surfactant. (4) In the transfer sheet according to claim 1, the antifogging layer contains 100 parts by weight of a polymer and 5 to 300 parts by weight of a polymer.
1. A transfer sheet comprising a composition that contains 1 part by weight of a hydrophilic monomer and 1 to 300 parts by weight of 1 crosslinkable monomer, and can be crosslinked with an electron beam. (5) The transfer sheet according to claim 4, wherein the antifogging layer contains 1 to 200 parts by weight of a surfactant. (6) In the transfer sheet according to claim 1, the antifogging layer contains 100 parts by weight of a polymer and 5 to 300 parts by weight of a polymer.
1. A transfer sheet comprising a composition which contains a hydrophilic crosslinkable monomer in an amount by weight of a hydrophilic crosslinkable monomer and is crosslinkable with an electron beam. (7) The transfer sheet according to claim 1, wherein the antifogging layer contains 1 to 200 parts by weight of a surfactant. (8) In the transfer sheet according to claim 3, 5, or 7, the antifogging layer has many hydrophilic groups on the surface and also contains a surfactant that can exude from the layer. A transfer sheet characterized by: (9) In the transfer sheet according to any one of claims 1 to 8, the antifogging layer has a thickness of 1 to 200 μm.
A transfer sheet having a thickness of (10) The transfer sheet according to any one of claims 1 to 9, wherein the transfer layer further includes a pattern layer and an adhesive layer. (11) The transfer sheet according to claim 10, wherein the transfer layer further includes a metal vapor deposited layer. (12) A transfer method comprising transferring to an object using a transfer sheet that has a release sheet and a transfer layer, and the release sheet side of the transfer layer is an anti-fog layer. . (13) The transfer method according to claim 12, wherein the transfer method is characterized in that the transfer is performed on the object using a transfer sheet having an adhesive layer on the opposite side of the releasable sheet.