JP5998882B2 - Transfer film and transfer film manufacturing method - Google Patents

Description

The present invention relates to a transfer film having a hard coat layer and a method for producing the same .

  Conventionally, a thermal transfer method using a transfer film has been used as a substitute for a direct decorating method such as painting, mainly as a decorating method for plastic moldings. Many of such transfer films are required to have a hard coat function for the purpose of protecting the surface of a plastic molded product. For example, the transfer film as described above generally has a configuration in which a release layer, a hard coat layer, a decorative layer, and an adhesive layer are sequentially laminated on one surface of a base film.

  Here, the release layer is required to have a function of imparting good releasability from the hard coat layer at the time of thermal transfer to a transfer target (plastic molding or the like). Further, the decorative layer is required to have a design property according to the demand, and the adhesive layer is required to have strong adhesiveness to the transfer target.

  Examples of a method for thermally transferring to the transfer target using the transfer film described above include, for example, a method of transferring a protective layer / decorative layer / adhesive layer simultaneously with injection molding, There are a method of transferring the adhesive layer to the transfer target, a method of transferring to the transfer target using vacuum and pressure, a heating machine, and the like.

  As such a transfer body (plastic molding or the like) for which a transfer film is required to have a hard coat function, for example, there are many soft plastic moldings typified by polycarbonate resin. In general, examples of the material constituting the hard coat layer exhibiting the above hard coat function include thermoplastic acrylic resins, two-part curable acrylic resins, and ultraviolet curable resins. Particularly, scratch resistance, chemical resistance, etc. Often used are UV curable resins having excellent resistance.

  Most of the transfer films have a structure in which a release layer, a hard coat layer, a decorative layer, and an adhesive layer are sequentially laminated on one surface of a base film. In particular, the release layer formed as the first layer on the base film is in addition to the good releasability from the hard coat layer described above, and at the time of ink coating when forming the hard coat layer. Ink repellency does not occur (top coatability), heat resistance that can withstand the heat during transfer, close contact with the substrate film or substrate, and furthermore, it can follow the shape of the object to be transferred (stretching) Sex).

  Examples of the material constituting the release layer include silicone or fluororesin that are frequently used as a release agent for adhesive tapes. However, these materials have a problem that repelling is likely to occur when the ink for forming the hard coat layer formed thereon is applied.

  In order to solve the above problems, a melamine resin, particularly an acrylic melamine resin is often used for the release layer. (Patent Document 1, Patent Document 2)

  However, the melamine resin has a problem that harmful formaldehyde is generated in the production process and remains in the melamine cured product and the ink drying apparatus in a large amount. According to a report from the International Agency for Research on Cancer, this formaldehyde is listed in Group 1 which is recognized as carcinogenic to humans, and it is also a problem that it is a causative substance of sick house syndrome.

On the other hand, among companies, when purchasing raw materials, parts and materials of products, many companies have established green procurement standards for selecting and procuring substances with a low environmental impact. The green procurement standards often include the absence of formaldehyde, which makes it difficult to handle melamine materials containing formaldehyde.

  The melamine resin is a thermosetting resin, and the manufacturing process requires a so-called baking process. For example, heating in an oven at 180 to 200 ° C. for about 30 seconds to 1 minute is required. Therefore, the base film needs to be able to withstand the heating temperature, and is not suitable for a thin base material or a heat-sensitive base material.

  On the other hand, as a release layer that can be formed at a temperature lower than that of the melamine resin, a method using an ink mainly composed of polyethylene wax has been proposed. Specifically, after the ink is applied, the release layer is formed by heating and leveling the ink. However, this method also has a problem that the release layer collapses depending on the temperature at the time of transfer, resulting in transfer failure (appearance failure).

Japanese Patent No. 2538479 JP 2009-137219 A

  An object of the present invention is to provide a transfer film that has a low environmental load (human load), can be processed at a low temperature, and imparts an excellent hard coat function to a transfer target (mainly a plastic molding).

The invention of claim 1 according to the present invention is a transfer film formed by sequentially laminating at least a release layer, a hard code layer, and an adhesive layer on one surface of a base film,
The release film is an acrylic urethane resin having a long-chain alkyl group having 10 to 30 carbon atoms.

The acrylic urethane resin is a cured product of an ink composition formed on one surface of the base film, and the ink composition includes at least an acrylic polyol resin and a long chain having 10 to 30 carbon atoms. acrylic resin having an alkyl group and a hydroxyl group, a transcription film you characterized by comprising a an isocyanate compound.

The invention of claim 2 according to the present invention, the releasing layer is a transfer film according to claim 1, characterized in that it comprises a cellulose derivative.

The invention of claim 3 according to the present invention is a transfer film according to claim 1, wherein the release layer is characterized by containing an acrylic silicone resin containing hydroxyl groups.

According to a fourth aspect of the present invention, there is provided the transfer film according to any one of the first to third aspects, wherein an anchor layer is provided between the base film and the release layer. is there.

The invention according to claim 5 according to the present invention is the transfer film according to claim 4 , wherein the surface of the anchor layer in contact with the release layer has an uneven shape.
Invention of Claim 6 which concerns on this invention is a manufacturing method for manufacturing the transfer film in any one of Claim 1 to 5, Comprising: The said transfer film is at least on one surface of a base film. A release layer, a hard cord layer, and an adhesive layer are sequentially laminated. The release layer has at least an acrylic polyol resin and a length of 10 to 30 carbon atoms on one surface of the base film. A method for producing a transfer film, comprising: forming an ink composition comprising an acrylic resin having a chain alkyl group and a hydroxyl group, and an isocyanate compound, and then curing the ink composition. .

According to the invention of claim 1 according to the present invention, the release layer is an acrylic urethane resin having a long chain alkyl group having 10 to 30 carbon atoms, thereby exhibiting excellent release properties during thermal transfer, and Thus, the repellency phenomenon of the hard coat ink applied on the release layer does not occur, and a uniform hard coat layer can be formed.

Also, using at least an acrylic polyol resin prior KiHanare type layer, an acrylic resin having a long chain alkyl group and a hydroxyl group having 10 to 30 carbon atoms, said acrylic urethane resin generated from the crosslinking reaction of an isocyanate compound Thus, the curing reaction is completed at a low temperature of room temperature to about 50 ° C., and a release layer with a small heat load on the base film can be produced.

Further, according to the invention of claim 2 , even in the case of in-mold transfer that transfers simultaneously with injection molding, that is, in-mold transfer that requires heat resistance at high temperature, because the release layer contains a cellulose derivative, The presence of a hydroxyl group-containing cellulose derivative improves heat resistance and can suppress heat wrinkles and blocking.

According to the invention of claim 3 , when the release layer contains an acrylic silicone resin containing a hydroxyl group, it is possible to exhibit releasability that can sufficiently cope with high-speed thermal transfer.

According to the invention of claim 4 , by providing an anchor layer between the base film and the release layer, the adhesion between the base film and the release layer can be improved, By smoothing the surface of the release layer, it is possible to give gloss to the surface of the transfer target.

In addition, according to the invention of claim 5 , the surface of the anchor layer can be provided with a concavo-convex shape, whereby designability can be imparted to the surface of the transfer target.
In addition, according to the invention of claim 6, excellent releasability is exhibited at the time of thermal transfer, and a uniform hard coat layer can be formed without causing the repellency phenomenon of the hard coat ink applied on the release layer. At the same time, the curing reaction can be completed at a low temperature of about room temperature to 50 ° C., and a method for producing a transfer film having a release layer with a small heat load on the base film can be provided.

  As described above, according to the present invention, environmental load (human load) is low, low-temperature processing is possible, and excellent hard coat functions and design properties are imparted to transferred objects (mainly plastic moldings). It is possible to provide a transfer film.

The cross-sectional schematic which shows one Embodiment of the transfer film of this invention. The cross-sectional schematic after the transcription | transfer to the molded object by the transfer film of FIG. The cross-sectional schematic which shows one Embodiment (matte tone) of the transfer film of this invention. FIG. 4 is a schematic cross-sectional view after transfer to a molded product using the transfer film of FIG. 3.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in each figure, the same referential mark is attached | subjected to the component which exhibits the same or similar function, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a schematic cross-sectional view showing an embodiment of the transfer film of the present invention. The transfer film of the present invention is a laminate comprising a base film 1, a release layer 2, a hard coat layer 3, a primer layer 4, a decorative (printing) layer 5, and an adhesive layer 6. Here, the decoration (printing) layer 5 (hereinafter simply referred to as a decoration layer) is usually a plurality of layers, and a decoration material having an optical effect such as embossing or a pearl pigment may also be included. Is possible. Hereinafter, each layer of the present invention will be described.

  Although not clearly shown in the drawings, an antistatic layer may be provided on the surface of the base film 1 opposite to the surface on which the release layer 2 is formed. The presence of the antistatic layer can reduce the adhesion of foreign matter to the transfer film, which can improve the yield. As the antistatic agent that can be used here, a conductive polymer such as polythiophene or PEDOT, a quaternary ammonium salt-containing polymer, or a coating agent for a sol-gel reaction product can be used.

  FIG. 2 shows a schematic cross-sectional view after transfer to the molded product 7 which is a transfer object, using the transfer film of FIG.

  FIG. 3 is a schematic cross-sectional view showing one embodiment (matte tone) of the transfer film of the present invention. The mat-like transfer film is a laminate composed of a base film 1, an anchor / design layer 9, a release layer 2, a hard coat layer 3, a primer layer 4, a decorative layer 5, and an adhesive layer 6. The anchor / design layer 9 is a layer on which fine irregularities are formed and has a matte appearance on the drawing. Although not shown in the figure, in order to make the transferred product into a hairline tone, it is possible to obtain a hairline transfer film by making this anchor and design layer into a hairline tone.

  FIG. 4 shows a schematic cross-sectional view after transfer to the molded product 7 which is a transfer object, using the transfer film of FIG.

  Examples of the base film 1 include base materials such as polyethylene terephthalate film, polyethylene naphthalate film, polypropylene film, polyethylene film, triacetyl cellulose film, polycarbonate film, nylon film, cellophane film, acrylic film, and vinyl chloride film. It is. Usable film thickness is from 25 μm to 250 μm, and particularly preferably from 38 μm to 150 μm.

  Further, the ink composition for forming the release layer 2 includes an acrylic urethane resin having a long-chain alkyl group having 10 to 30 carbon atoms. By using an acrylic urethane resin having a long-chain alkyl group in such a carbon number range, it exhibits excellent releasability during thermal transfer, and the repellency phenomenon of hard coat ink applied on this release layer Therefore, a uniform hard coat layer can be formed. When the number of carbon atoms is less than 10, the releasability at the time of thermal transfer is insufficient, and transfer unevenness occurs on the surface of the transfer object, resulting in a quality defect. On the other hand, if the number of carbon atoms exceeds 30, repelling occurs when the hard coat ink is applied, and a uniform hard coat layer cannot be formed.

  Examples of the method for forming a release layer comprising an acrylic urethane resin having a long-chain alkyl group include, for example, an ink composition comprising an acrylic polyol resin and an alkyl isocyanate having a long-chain alkyl group, or a long-chain alkyl group. In addition, there is a method in which an ink composition composed of an acrylic resin having a hydroxyl group and an isocyanate compound is applied to one surface of the substrate film 1 and then crosslinked.

In addition, as described above, the release layer may require fine adjustment of performance such as adhesion to the base film, release properties, stretchability, solvent resistance, and heat resistance depending on the transfer target. For example,
The ink composition is adjusted by blending an acrylic polyol resin or an acrylic urethane resin into the ink composition composed of the acrylic resin having a long-chain alkyl group and a hydroxyl group and an isocyanate compound, and a release layer is formed. . The recommended blending amount of the acrylic resin having a long-chain alkyl group and a hydroxyl group is preferably in the range of 2 to 30% by weight with respect to the acrylic polyol resin, but is not particularly limited.

  The acrylic polyol resin is an acrylic resin having a plurality of hydroxyl groups, and the monomer component of the composition is a (co) polymer of a (meth) acrylic monomer having a hydroxyl group, but does not have a hydroxyl group. A (meth) acrylic acid ester monomer, a styrene monomer, a vinyl acetate monomer or the like may be copolymerized. Examples of the (meth) acrylic monomer having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, and the like. There is.

  Examples of the acrylic monomer having a long-chain alkyl group include decyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate, tridecyl (meth) acrylate, tetradecyl (meth) acrylate, and pentadecyl (meth) acrylate. , Hexadecyl (meth) acrylate, heptadecyl (meth) acrylate, octadecyl (meth) acrylate, nonadecyl (meth) acrylate, icosyl (meth) acrylate, heicosyl (meth) acrylate, triacontyl (meth) acrylate and the like. The acrylic resin having a long chain alkyl group and a hydroxyl group can be obtained by copolymerization of an acrylic monomer having a long chain alkyl group and a (meth) acryl monomer having a hydroxyl group.

  The isocyanate compound means toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), xylylene diisocyanate (XDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), and prepolymers thereof.

  As a result of intensive efforts, the inventors have found that a cured product of an ink composition comprising at least an acrylic polyol resin, an acrylic resin having a long-chain alkyl group and a hydroxyl group, and an isocyanate compound, that is, a release layer is preferable. . This ink composition does not require a baking step (180 to 200 ° C.) at a high temperature for curing like a melamine resin, and the curing reaction is completed by aging at a temperature of about room temperature to 50 ° C. As described above, according to the present invention, a release layer can be prepared by low-temperature curing, and therefore, problems such as wrinkles, heat shrinkage, and crystallization occur under the curing conditions of melamine release. A substrate film such as a film, a vinyl chloride film, or a PET-G film, which is weak against heat but has a high elongation rate and excellent molded article followability, can be used.

  The transfer film may be extremely heated during transfer depending on the application. For example, in in-mold transfer that transfers simultaneously with injection molding, heat of about 160 ° C. is applied. In this case, heat resistance can be improved by blending a cellulose derivative containing a hydroxyl group into the release layer of the transfer film used for in-mold transfer. Preferred cellulose derivatives containing hydroxyl groups for use in the present invention are nitrocellulose, cellulose acetate butyrate, and cellulose acetate propionate. Here, as a compounding quantity of a cellulose derivative, 20 weight%-100 weight% are preferable with respect to a main ingredient (acryl polyol resin).

  Moreover, in the case of a hard coat with high adhesion and high adhesion containing urethane, it may be required that the release layer is lightly peeled. At this time, by blending an acrylic silicone resin containing a hydroxyl group, peeling can be lightened without degrading the top coatability. As a suitable compounding quantity at this time, it is 0.5 to 15 weight% with respect to the main ingredient (acrylic polyol resin). Although there is no restriction | limiting in particular in the thickness of this mold release layer 2, 0.1-5 micrometers thickness is optimal.

  Moreover, by making the release layer 2 contain a resin filler or an inorganic filler, it is possible to make it anti-glare or make the surface a mat. Preferably, as shown in FIG. 3, it is desirable that an anchor layer 9 is present between the release layer 2 and the base film 1.

The anchor layer 9 is not only for the purpose of improving the adhesion between the release layer 2 and the base film 1, but also, for example, by providing a smooth anchor layer 9, the unevenness of the base film 1 is alleviated. Since the release layer surface formed on the surface is a smooth surface, it is possible to give high gloss to the final product surface (hard coat surface).

  On the other hand, as shown in FIG. 2, by forming mat-like irregularities as the anchor layer 9, the surface of the release layer becomes matte, and the final product surface (hard coat surface) can be matte. Moreover, although not shown in figure, by forming the unevenness | corrugation of a hairline tone as an anchor layer, a mold release layer surface becomes a hairline tone and the final product surface (hard coat surface) can be made a hairline tone. The uneven step of matte tone and hairline tone is a factor of pinholes in each printing process, so it is preferably in the range of 1 to 30 μm, and the average thickness of the anchor / design layer is preferably in the range of 2 to 15 μm. . The material of the anchor and design layer is not particularly limited, but a two-component curable urethane or a two-component curable polyester urethane is preferable from the viewpoint of anchor performance and heat resistance.

  The hard coat layer 3 is preferably in a tack-free state and is made of a resin that can be cross-linked by irradiating ultraviolet rays or electron beams after being transferred to the transfer object. The reason for cross-linking after transfer is that this transfer foil is often used in injection molding or heat transfer, but if cross-linked in advance, cracks tend to occur during transfer stretching, resulting in poor appearance. There are mainly the following three methods for realizing tack-free properties before transfer. As the first method, a polymer acrylate or methacrylate is used. The second method is a method in which a liquid or semi-liquid ultraviolet curable resin is slightly cured with a crosslinking system such as isocyanate / polyol resin or epoxy resin / amines to make it tack-free. The third method is a method of slightly irradiating ultraviolet rays or an electron beam to bring it into a semi-cured state.

  In the present invention, the first method is used. The reason is that in the second method, the adhesiveness to the release layer is excessively increased and the peelability as a transfer foil is insufficient. On the other hand, the third method has a problem of intensity variation and reproducibility of the ultraviolet irradiator and the electron beam irradiator, and the process cost is high.

  Further, in the case of the first method, in order to prevent the resin from flowing at the time of injection molding, it contains an acryloyl group or a methacryloyl group having a molecular weight of 50,000 or more and a glass transition temperature of 60 ° C. or more. Acrylic resin (acrylic acrylate) is preferred. However, since it is a polymer, the ultraviolet curability tends to be inferior, and it is necessary to add nano silica particles to compensate for the inferior surface hardness. When the addition amount is less than 10% by weight with respect to the acrylic resin, no effect on hardness is observed. On the other hand, if it is 40% by weight or more, it becomes too brittle and the wear resistance is poor. The optimum addition amount is 10% by weight or more and less than 40% by weight with respect to the acrylic resin.

  The nanosilica particles of the hard coat layer 3 preferably have a particle diameter of 10 or more and less than 100 nm in order to maintain transparency. The nanosilica particles are preferably surface-treated with an acryloyl / methacryloyl group-containing silane coupling agent or the like, but may be mere untreated silica particles.

  In general, ultraviolet curable resins tend to be weak in abrasion resistance, so it is desirable to add a small amount of polytetrafluoroethylene powder, polyethylene wax, metal soap, or the like to improve slipperiness.

  The thickness of the hard coat layer 3 is preferably 2 μm or more and 10 μm or less in consideration of the expression of hardness, curing shrinkage, and cost.

The primer layer 4 is a layer for maintaining close contact between the hard coat layer 3 and the decorative layer 5, and contains a hydroxyl group such as a polyol resin such as a polyester polyol resin or an acrylic polyol resin and / or a hydroxyl group-containing vinyl chloride resin. It is preferable that it is resin which consists of this resin and an isocyanate compound. Further, the thickness of the primer layer 4 is not particularly limited, but a thickness of 0.5 to 10 μm is optimal.

  The decoration layer 5 is not particularly different in material, but as a decoration technique that can be adopted in the present invention, not only general printing with color inks, but also pearl, fluorescence, mirror, retroreflection, magnetic printing, etc. Special printing, embossing that forms uneven structures (various lens effects and holograms) by heat and ultraviolet rays, and thin film formation technology that forms aluminum, silver, chromium, titanium oxide, zinc sulfide, etc. by vacuum deposition or sputtering Is possible.

  As the adhesive layer 6, a known heat-sealable adhesive or pressure-sensitive adhesive can be used. For example, vinyl acetate resin, ethylene vinyl acetate copolymer resin, vinyl chloride resin, acrylic resin, butyral resin, epoxy resin, polyester resin, polyurethane resin, acrylic adhesive, rubber adhesive, silicon adhesive, urethane Examples include adhesives. The thickness of the adhesive layer 6 is optimally in the range of 0.5 to 10 μm.

  Hereinafter, the present invention will be described in detail with reference to examples.

<Example 1>
Using a biaxially stretched polyester film (Mitsubishi Resin Co., Ltd .: G440E50) having a thickness of 50 μm as a base film, a release ink having the following composition is formed on one surface thereof using a microgravure method, and the film thickness after drying is 0. The film was applied and dried to a thickness of 2 μm, and then aged at 50 ° C. for 5 days to prepare a release film.
(Composition of release ink)
Acrylic polyol resin (LC # 6560 manufactured by Toei Kasei Co., Ltd.): 100 parts by weight Nitrocellulose (H1 / 4): 10 parts by weight Acrylic resin: 5 parts by weight (Hydroxyl, which is a copolymer of 6-hydroxyhexyl acrylate and stearyl methacrylate) Long chain alkyl group (having 18 carbon atoms)
Isocyanate compound (Coronate L manufactured by Nippon Polyurethane Co., Ltd.) 20 parts by weight

Next, on one surface of the release film, a hard coat ink having the following composition was applied by a microgravure method so that the film thickness after drying was 5.0 μm and dried to form a hard coat layer. .
(Composition of hard coat ink)
UV curable resin: 100 parts by weight (DIC 29/117 RC29-117: with UV polymerization initiator, solid content 30%)
Silica: 20 parts by weight (manufactured by Nissan Chemical Co., Ltd .: particle size 10-20 nm, MEK dispersion, solid content 30%)

  Next, an acrylic polyol / isocyanate ink (manufactured by Toyo Ink Co., Ltd .: V425 anchor) was applied as a primer layer on the hard coat layer using a gravure method so that the film thickness after drying was 2 μm. A decorative layer is formed by printing with a predetermined decorative ink thereon, and further using an adhesive ink (manufactured by Toyo Ink Co., Ltd .: K539HP adhesive varnish), the film thickness after drying by gravure method is 1 μm. This was applied to form an adhesive layer to prepare a transfer film.

  The transfer film obtained above was set inside the mold of an injection molding machine, polycarbonate ABS alloy resin was injection molded, and transferred simultaneously with molding to obtain a molded product.

<Example 2>
A release film was produced in the same manner as in Example 1 except that the release ink having the following composition was used.
(Composition of release ink)
Acrylic polyol resin (LC # 6560 manufactured by Toei Kasei Co., Ltd.): 100 parts by weight Nitrocellulose (H1 / 4): 10 parts by weight Acrylic resin: 5 parts by weight (Hydroxyl, which is a copolymer of 6-hydroxyhexyl acrylate and stearyl methacrylate) Long chain alkyl group (having 18 carbon atoms)
Silicone-modified acrylic resin (manufactured by NOF Corporation: FS730) 5 parts by weight Isocyanate compound (Coronate L, manufactured by Nippon Polyurethane Co., Ltd.) 20 parts by weight

Next, on one surface of the release film, a hard coat ink having the following composition was applied by a microgravure method so that the film thickness after drying was 5.0 μm and dried to form a hard coat layer. .
(Composition of hard coat ink)
Acrylic acrylate resin: 100 parts by weight (manufactured by Taisei Fine Chemical Co., Ltd .: molecular weight 60,000)
Photopolymerization initiator (BASF: Irgacure 184) 3 parts by weight Isocyanate compound (Japan Polyurethanes: Coronate HL) 5 parts by weight

  Thereafter, in the same manner as in Example 1, a primer layer, a decorative layer, and an adhesive layer were sequentially formed to prepare a transfer film, and transferred simultaneously with injection molding with a polycarbonate ABS alloy resin to obtain a molded product.

<Example 3>
Using the same base film as in Example 1, on one surface, using an anchor layer ink having the following composition, the film was dried by a microgravure method so that the film thickness after drying was 5.0 μm, and dried. Thus, an anchor layer was formed.
(Composition of anchor layer ink)
Acrylic polyol resin (Toei Kasei Co., Ltd .: LC # 6560) 100 parts by weight Silica filler (Evonik Degussa Co., Ltd .: particle size 6 μm) 5 parts by weight Polyacrylonitrile filler (Toyobo Co., Ltd .: particle size 7 μm) 5 parts by weight Isocyanate compound ( Nippon Polyurethane Co., Ltd .: Coronate HL) 10 parts by weight

Next, on the anchor layer, a release layer ink having the following composition was applied by a microgravure method so that the film thickness after drying was 1.0 μm and dried to form a release layer.
(Composition of release ink)
Acrylic polyol resin (manufactured by Toei Kasei Co., Ltd .: LC # 6560) 100 parts by weight Nitrocellulose H1 / 4 10 parts by weight Acrylic resin 5 parts by weight (Hydroxyl group and long chain alkyl group as a copolymer of 6-hydroxyhexyl acrylate and stearyl methacrylate) (Has 18 carbon atoms)
Silicone-modified acrylic resin (manufactured by NOF Corporation: FS730 5 parts by weight Isocyanate compound (manufactured by Nippon Polyurethane Co., Ltd .: Coronate L) 20 parts by weight

  Next, a primer layer, a hard coat layer, a decorative layer, and an adhesive layer were sequentially laminated on the release layer in the same manner as in Example 2 to prepare a transfer film.

Next, the above-mentioned transfer film and polycarbonate AB are added to a vacuum / pressure forming machine (TOM molding machine).
A notebook personal computer casing made of S alloy resin was set, and vacuum-pressure forming was performed at 120 ° C. to obtain a molded product having a transferred mat-like surface.

<Comparative Example 1>
On one surface of the same base film as in Example 1, a silicone-based ink (manufactured by Momentive Performance Materials: SHC-900) is used as a release ink, and the film thickness after drying is 0. It apply | coated so that it might be set to 2 micrometers, and it baked at 180 degreeC after that, and produced the release film.

  Next, a hard coat layer was formed in the same manner as in Example 2 on the release layer of the release film.

<Evaluation and method>
The transfer films produced in Examples 1 to 3 and Comparative Example 1 were also visually evaluated for the moldability of the release layer and the hard coat layer, and the transferability of each transfer film to a molded product. The case where there was no abnormality in the appearance (a level where there was no problem in practical use) was marked as ◯, and the case where there was a problem (practical problem) was marked as x. The results are shown in Table 1.

<Comparison result>
In the products of the present invention obtained in Examples 1 to 3, the release layer, the hard coat layer, the decorative layer, and the adhesive layer could all be formed satisfactorily. In addition, good results were obtained for transfer to a molded product using each transfer film.
On the other hand, in Comparative Example 1, the release layer could be formed on the base film, but in the formation of the hard coat layer to be laminated thereon, the ink repellency occurred when the hard coat ink was applied, and the uniform coating was performed. A film could not be formed. Therefore, the subsequent decorative layer and adhesive layer could not be formed, and the transfer film was not produced.

  The transfer film obtained by the present invention can be used for surface protection and decoration of panel members and the like used for home appliances, housing equipment, office equipment, automobile parts and the like.

DESCRIPTION OF SYMBOLS 1 ... Base film, 2 ... Release layer, 3 ... Hard coat layer, 7 ... Molded product, 4 ... Primer layer, 5 ... Decoration (printing) layer, 6 ... Adhesive layer, 9 ... Anchor layer

Claims (6)

A transfer film in which at least a release layer, a hard code layer, and an adhesive layer are sequentially laminated on one surface of a base film,
The release layer, Ri acrylic urethane resins der having a long-chain alkyl group having 10 to 30 carbon atoms,
The acrylic urethane resin is a cured product of an ink composition formed on one surface of the base film, and the ink composition includes at least an acrylic polyol resin and a long-chain alkyl group having 10 to 30 carbon atoms. And an acrylic resin having a hydroxyl group and an isocyanate compound . The transfer film according to claim 1, wherein the release layer contains a cellulose derivative. The transfer film according to claim 1, wherein the release layer contains an acrylic silicone resin containing a hydroxyl group. Between the release layer and the substrate film, a transfer film according to any one of claims 1 to 3, characterized in that a anchor layer. The transfer film according to claim 4 , wherein one surface of the anchor layer has an uneven shape. A manufacturing method for manufacturing the transfer film according to claim 1,
The transfer film is formed by sequentially laminating at least a release layer, a hard code layer, and an adhesive layer on one surface of a base film,
The release layer comprises, on one surface of the base film, an ink composition comprising at least an acrylic polyol resin, an acrylic resin having a long chain alkyl group having 10 to 30 carbon atoms and a hydroxyl group, and an isocyanate compound. A method for producing a transfer film, wherein the ink composition is formed by coating and then curing the ink composition.

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