JP2008155441A - In-mold transfer foil and molding using the foil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide in-mold transfer foil which is good in heat resistance preventing heat whitening and followability to elongation/shrinkage and can transfer a hologram excellent in decorative appearance with suppressed breaking and whitening to a three-dimensional surface. <P>SOLUTION: A substrate 11, mold release layer 13, hologram layer 15, reflection layer 17, high brightness ink layer 18, and adhesive layer 19 are provided. The mold release layer 13 is made of a melamine resin. The hologram layer 15 contains a cured ionizing radiation curable resin, a reactive silicone, and polyethylene wax. The high brightness ink layer contains at least metal vapor deposition film splits surface-treated with methyl silyl isocyanate or a cellulose derivative. The ionizing radiation-cured hologram layer has an elongation at break at 23°C of at least 5% and a heat resistance preventing whitening even when allowed to stand at 150°C for one hour in an in-mold transfer foil state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an in-mold transfer foil, and more specifically, by inserting into a molding die and molding, the followability to a three-dimensional surface of a molded product is good, and a hologram can be transferred without whitening. The present invention relates to an in-mold transfer foil and a molded product.

  In the present specification, “ratio”, “part”, “%” and the like indicating the composition are based on mass unless otherwise specified, and the “/” mark indicates that they are integrally laminated. “PET” is an abbreviation, synonym, functional expression, common name, or industry term for “polyethylene terephthalate”.

  (Main applications) The main applications of the molded product using the in-mold transfer foil of the present invention include equipment bodies such as daily necessities and daily necessities, containers for food and various articles, housings such as electronic equipment and office supplies. A three-dimensional molded product such as a body, which has a unique design improved by a hologram on the surface of the molded product, and the shape and contents of the molded product are arbitrary. However, there is no particular limitation as long as it is an application in which a hologram is transferred to the surface of a molded product for high design.

(Background Art) Conventionally, in a molded product by injection molding or the like, a hologram transfer foil is inserted into a mold at the time of molding, and a hologram is transferred simultaneously with injection molding.
In order to further increase the design, it is required to transfer a hologram to a three-dimensional part of a molded product. However, the transfer is limited to a flat surface or a curved surface in one direction. In the three-dimensional part, the hologram transfer foil stretches and wrinkles and tears due to the flow of the molten high-temperature injection molding resin, and the glittering property changes due to cracks and expansion / contraction wrinkles due to stretching and / or shrinkage. In the case of only an aluminum thin film, the original metallic luster becomes white due to expansion and contraction, and the metallic luster is completely lost, and the hologram is also lost. Conventionally, in order to suppress the influence of expansion and contraction to the minimum, it has been necessary to suppress the influence of expansion and contraction to a minimum by attaching or transferring a hologram to a portion with little expansion and contraction, or making a hologram with a small area.
Therefore, in order to obtain a molded product with a hologram with excellent heat resistance that does not whiten by heat, good followability to expansion and contraction even if the expansion ratio is large, and less deterioration of hologram effect such as cracking and whitening, etc. There is a need for an in-mold transfer foil for obtaining a molded article with a hologram that can be transferred to a substrate.

(Prior Art) Conventionally, an in-mold labeling type injection molding of a label made of a laminated sheet including a base material, a printing layer, a light diffraction structure layer (corresponding to the hologram layer of the present invention) and a thermoadhesive resin layer There is known a cup-shaped container that is integrally molded by the above-described method (for example, see Patent Document 1). However, the peripheral wall on which the hologram layer is formed is a flat surface and not a solid surface.
Further, after the decorative transfer layer (including the hologram layer of the present invention) is transferred to the stretchable material, the surface is transferred to a part of the surface of the molded article body having at least a part of the surface by unevenness or a curved surface by heating and pressing. A decorative molded product is known (for example, refer to Patent Document 2). However, there is a drawback that the decorative transfer layer cannot be directly transferred to a molded product.
Furthermore, a transfer film composed of a base film, a protective layer, a metal thin film (corresponding to the hologram layer and the reflective layer of the present invention), and an adhesive layer is produced, and a pair of molds are clamped with the transfer film interposed therebetween, There is known a method for manufacturing a false nail in which a molten resin is injected into the mold and a metal thin film is applied to the surface of the nail body (see, for example, Patent Document 3). However, the false nail is a large curved surface in one direction, and the transfer film itself is wound around a flat surface, and it is difficult to say that it is three-dimensional. Also, the materials of the protective layer, metal thin film, and adhesive layer constituting the transfer film However, there is no description or suggestion about the stretchability of the material, which is extremely general and is the biggest problem in transfer to a three-dimensional object.
Furthermore, the present applicant has also disclosed a method of forming a hologram by previously forming a fine unevenness when forming a three-dimensional molded product, and then providing a reflective layer on the fine uneven surface (for example, (See Patent Documents 4 to 5.) However, in order to form the fine irregularities in advance, a dedicated shaping film for shaping the fine irregularities must be created, and the in-mold molding method using the film is complicated, and the fine irregularities formed There is a problem that a step of providing a reflective layer is required, resulting in high cost.

JP 2005-7647 A JP 2004-58599 A Japanese Patent Laid-Open No. 2003-9941 JP 2004-163482 A JP 2004-284178 A

  Accordingly, the present invention has been made to solve such problems. The purpose is to transfer a hologram with excellent heat resistance that does not whiten by heat, good conformity to expansion and contraction even when the expansion ratio is large, and less deterioration of hologram effects such as cracking and whitening to a three-dimensional surface. It is to provide a transfer foil for in-mold.

To solve the above problem,
The transfer foil for in-mold according to the invention of claim 1 is for in-mold, comprising a base material and a release layer, a hologram layer, a reflective layer, a high-brightness ink layer, and an adhesive layer on one surface of the base material. In the transfer foil, the release layer is a melamine resin, the hologram layer contains a cured product of ionizing radiation curable resin, reactive silicone, and polyethylene wax, and the high-brightness ink layer is at least an organic fatty acid, methylsilyl isocyanate Or it is made to contain the metal vapor deposition film | membrane piece surface-treated with the cellulose derivative.
In the transfer foil for in-mold according to the invention of claim 2, the hologram layer is (1) the coating film before ionizing radiation curing is finger-dried, and (2) the breaking elongation at 23 ° C. after ionizing radiation curing is 5 %, And (3) left in a 150 ° C. atmosphere for 1 hour in an in-mold transfer foil with a substrate, a release layer, a hologram layer, a reflective layer, a high-brightness ink layer and an adhesive layer. Also, it is made to have heat resistance that does not whiten.
The molded product according to the invention of claim 3 is manufactured by the in-mold injection molding method using the transfer foil for in-mold according to any one of claims 1 to 2.

According to the first aspect of the present invention, it is possible to transfer a heat-resistant material that is not whitened by heat, a good conformability to expansion and contraction, and a low design effect of hologram effects such as cracking and whitening to a three-dimensional surface. An in-mold transfer foil is provided.
According to the second aspect of the present invention, in addition to the effect of the first aspect, it can be efficiently processed in a winding shape, has good followability to expansion / contraction even if the expansion / contraction ratio is large, and has hologram effects such as cracking and whitening. An in-mold transfer foil is provided in which there is little decrease in the thickness.
According to the third aspect of the present invention, there is provided a molded article with a hologram using a transfer foil for in-mold onto which a hologram having excellent design properties with little reduction in hologram effect such as cracking and whitening is transferred.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of an in-mold transfer foil showing one embodiment of the present invention.
FIG. 2 is a cross-sectional view of an in-mold transfer foil showing one embodiment of the present invention.
FIG. 3 is a cross-sectional view of a molded product transferred using the in-mold transfer foil of the present invention.

  (In-mold injection molding method) First, the in-mold injection molding method is (1) a step of preparing an in-mold transfer foil 10 and (2) the in-mold transfer foil 10 into an injection mold. (3) The resin layer is injection-molded and brought into close contact with the injection mold, whereby the hologram layer 15, the reflective layer 17, and the high-brightness ink layer 18 of the in-mold transfer foil 10 are adhered to the surface of the resin. And the step of transferring the adhesive layer 19 and (4) the step of releasing the mold after cooling, peeling the base material 11 and the release layer 13 of the in-mold transfer foil 10 and taking out the molded product. A molded product 100 in which a hologram is transferred to a three-dimensional surface can be manufactured by an injection molding method.

(In-mold transfer foil) As shown in FIG. 1, the in-mold transfer foil 10 of the present invention comprises a base material 11, a release layer 13, a hologram layer 15, and a reflective layer 17 on one surface of the base material. In the layer configuration of the high-brightness ink layer 18 and the adhesive layer 19, the hologram layer 15 and the release layer 13 are made of a specific material. Preferably, the hologram layer 15 is (1) the coating film before ionizing radiation curing is finger-dried, (2) the elongation at break at 23 ° C. after ionizing radiation curing is 5% or more, and (3) the substrate 11. Heat resistance that does not whiten even when left in a 150 ° C. atmosphere for 1 hour in the state of the in-mold transfer foil 10 provided with the release layer 13, the hologram layer 15, the reflection layer 17, the high-brightness ink layer 18, and the adhesive layer 19. Have sex. The reflective layer 17 is preferably a transparent reflective layer, but an opaque metal thin film has the same effect.
Further, as shown in FIG. 2, a hard coat layer 12 is provided between the release layer 13 and the hologram layer 15, a print layer 16 is provided between the reflective layer 17 and the high brightness ink layer 18, Although other layers such as a primer layer may be provided, the hologram layer 15 and the reflective layer 17 are adjacent to each other.
The in-mold transfer foil 10 of the present invention comprises a base material 11 / a release layer 13 / a hard coat layer 12 (if necessary) / a hologram layer 15 / a reflective layer 17 / a printing layer 16 (if necessary) / high. It consists of a layer structure of luminance ink layer 18 / adhesive layer 19.
The in-mold transfer foil 10 of the present invention can be preferably used for transferring a hologram to a three-dimensional molded product by an in-mold injection molding method. FIG. 3 shows a molded product to which a hologram is transferred. Note that FIG. 3 is a three-dimensional shape, although the molded product is drawn on a plane for convenience of drawing.

  (Substrate) As the substrate 11, various materials can be applied depending on the use as long as the substrate 11 has heat resistance, mechanical strength, mechanical strength to withstand manufacturing, solvent resistance, and the like. For example, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polyamide resins such as nylon 6, polyolefin resins such as polyethylene, polypropylene and polymethylpentene, vinyl resins such as polyvinyl chloride, polymethyl methacrylate, etc. Examples include acrylic resins, polycarbonate, cellophane, and cellulose films such as cellulose acetate. Preferably, in terms of heat resistance and mechanical strength, polyethylene terephthalate is the most suitable for polyester resin films such as polyethylene terephthalate and polyethylene naphthalate. The thickness of the substrate is usually about 2.5 to 50 μm, but 4 to 25 μm is preferable in terms of transferability.

  The substrate may be a copolymer resin containing these resins as a main component, a mixture (including an alloy), or a laminate composed of a plurality of layers. The substrate may be a stretched film or an unstretched film, but a film stretched in a uniaxial direction or a biaxial direction is preferable for the purpose of improving the strength. The substrate is used as a film, sheet or board formed of at least one layer of these resins. Prior to application, the substrate is subjected to corona discharge treatment, plasma treatment, ozone treatment, flame treatment, primer (also called an anchor coat, adhesion promoter, or easy adhesive) application treatment, pre-heat treatment, dust removal treatment. Alternatively, easy adhesion treatment such as vapor deposition treatment or alkali treatment may be performed. Moreover, you may add additives, such as a filler, a plasticizer, a coloring agent, and an antistatic agent, as needed.

  (Release layer) The release layer 13 includes a release resin, a resin containing a release agent, and a curable resin that is cross-linked by ionizing radiation. In the present invention, a melamine resin is used. By using the melamine resin, stable releasability is exhibited in combination with a protective layer protective layer 14 described later. The release layer 13 is formed by dispersing or dissolving the resin in a solvent and applying it to at least one part by a printing or coating method such as roll coating, gravure coating, comma coating, or pre-coating and drying to form a coating film. Form. Further, if necessary, it may be heat-dried or aged at a temperature of 30 ° C. to 120 ° C. The thickness of the release layer 13 is usually about 0.01 μm to 5 μm, preferably about 0.5 μm to 3 μm. The thinner the thickness is, the better. However, when the thickness is 0.1 μm or more, better film formation is obtained and the peeling force is stabilized.

  (Hologram Layer) The hologram layer 15 includes a cured product of ionizing radiation curable resin, reactive silicone, and polyethylene wax. This makes it possible to transfer a hologram with excellent heat resistance that does not whiten by heat even after ionizing radiation curing, excellent conformability to expansion and contraction, and less deterioration of hologram effects such as cracking and whitening to a three-dimensional surface. be able to. As the ionizing radiation curable resin, for example, an epoxy-modified acrylate resin, a urethane-modified acrylate resin, an acrylic-modified polyester, and the like can be applied, and a urethane-modified acrylate resin is preferable.

  (Ionizing radiation curable resin composition M) A preferable urethane-modified acrylate resin is "ionizing radiation curable resin composition M". As the “ionizing radiation curable resin composition M”, a cured product of an ionizing radiation curable resin containing a urethane (meth) acrylate oligomer, specifically, light disclosed in JP-A-2001-329031. A curable resin is preferred. That is, “ionizing radiation curable resin composition M” (1) isocyanates having 3 or more isocyanate groups in the molecule, (2) at least one hydroxyl group and at least two (meth) acryloyloxy groups in the molecule An ionizing radiation curable resin containing a urethane (meth) acrylate oligomer which is a reaction product of a polyfunctional (meth) acrylate having, or (3) a polyhydric alcohol having at least two hydroxyl groups in the molecule, and (meth) The hologram layer contains a cured product of an acrylate oligomer and a lubricant, and the hologram layer is (1) an isocyanate having three or more isocyanate groups in the molecule, and (2) at least one hydroxyl group in the molecule and a (meth) acryloyloxy group. Polyfunctional (meth) acrylates having at least 2 or (3) at least 2 hydroxyl groups in the molecule A urethane which is the reaction product of a polyhydric alcohol (meth) (herein referred to as "ionizing radiation-curable resin composition M") ionizing radiation curable resin containing an acrylate oligomer having. Moreover, you may include a (meth) acrylate oligomer etc. as needed.

  ((Meth) acrylate oligomer) The (meth) acrylate oligomer may be a heat-resistant oligomer, and examples thereof include trade names of Nippon Synthetic Chemical Co., Ltd .; Purple light 6630B, 7510B, 7630B and the like. The ratio on the basis of mass to be contained is about 10 to 30 parts, preferably 15 to 25 parts with respect to 100 parts of “ionizing radiation curable resin composition M”. If it is less than this range, the heat resistance is insufficient, and if this range is exceeded, the heat resistance is good, but cracking tends to occur.

  (Reactive silicone) As the reactive silicone, there is a reactive silicone that reacts with the resin at the time of curing with ionizing radiation to bond and integrate, or a part of the reactive silicone remains. The reactive silicone is a reactive silicone modified by acrylic modification, methacryl modification, epoxy modification, or the like, and the ratio on a mass basis to contain the reactive silicone is “ionizing radiation curable resin composition M” 100. On the other hand, it is about 0.1 to 10 parts, preferably 0.3 to 5 parts. If it is less than this range, peeling from the press stamper is insufficient at the time of relief molding, and it is difficult to prevent contamination of the press stamper and the moldability is poor. Further, beyond this range, the adhesiveness of the reflective layer to the hologram layer surface is low, and the commercial value is lost by peeling between the hologram layer and the reflective layer. Addition of conventional silicone oil has poor adhesion to the reflective layer.

  (Polyethylene wax) Polyethylene wax includes polyethylene resin particles and beads, and is preferably spherical beads. However, when polyethylene wax is added, the foil breakage is reduced, so the amount added is about 0.01 to 10 parts by weight, preferably 0.1 to 5 parts by weight, with respect to 100 parts by weight of ionizing radiation curable resin. And

In this way, by including the cured product of ionizing radiation curable resin, reactive silicone, and polyethylene wax in the hologram layer 15, the following effects can be achieved.
(1) Since the coated film of the hologram layer 15 in a coated state before ionizing radiation curing is not sticky in a finger dry state and can be wound up without blocking, roll-to-roll processing can be performed. (2) The reactive silicone is included in the hologram layer 15 so that the moldability is good, so that the relief structure can be easily molded and cured with ionizing radiation after molding. In addition, even if the hologram layer 15 is transferred to a three-dimensional molded product having a large expansion and contraction, the hologram layer 15 has a good followability to the expansion and contraction, and transfers a hologram excellent in design with little deterioration of the hologram effect such as cracking and whitening to a three-dimensional surface. I can do it. The breaking elongation at 23 ° C. after ionizing radiation curing can be 5% or more, preferably 7% or more. If it is less than 5%, it cracks or whitens during expansion and contraction. When it is 7% or more, even if the expansion / contraction ratio is high, it does not crack or whiten during expansion / contraction. (3) In an in-mold transfer foil state in which a substrate 11, a release layer 13, a hologram layer 15, a reflection layer 17, a high-brightness ink layer 18, and an adhesive layer 19 are provided, in an atmosphere of 150 ° C., preferably 170 ° C. Therefore, the hologram does not deteriorate even with heat of 150 to 200 ° C. which is a resin temperature in normal injection molding. The hologram image does not deteriorate because it is instantaneous even at 200 ° C. heat. The heat resistance is the same whether or not the adhesive layer 19 is provided.

Furthermore, there are the following effects.
(4) The hologram layer 15 after the transfer becomes the outermost surface layer, and the hologram can be removed from the solvent, mechanical friction, and wear even when used in extremely severe environments, used for a long period of time, and / or repeatedly used many times. Protects against damage and has excellent durability. (5) Since the hologram layer 15 is in contact with the release layer 13 using a melamine-based resin, the hologram layer 15 has stable releasability, good foil breakage during transfer, and extremely low occurrence of burrs. it can.

  (Breaking elongation) The stretchability of the protective layer 14 and / or the hologram layer 15 is expressed by breaking elongation, and the method for measuring the breaking elongation (%) of the layer is after UV curing under conditions of 23 ° C. and 55% RH. After allowing the resin layer to stand for 24 hours or more, data processing was performed using the Tensilon multi-function data processing TYPE MP-100 / 200S Ver. Measurement was performed using No. 44. The sample is 10 mm wide, the distance between chucks is 50 mm, the RANGE is 20%, the load is 100 kg, and the tensile speed is 10 mm / min. The elongation with respect to the length was used. In the measurement of the elongation at break of the hard coat layer 12 and / or the hologram layer 15, it is difficult to produce only the hard coat layer 12 and / or the hologram layer 15 film, so that the 10 μm hard coat layer 12 and / or Alternatively, the hologram layer 15 was formed, exposed with a metal halide lamp at an integrated exposure amount of 250 mj, and then peeled off to obtain a sample.

  (Heat resistance) The heat resistance of the hologram layer is determined by leaving it in an oven at 150 ° C. to 170 ° C. for 1 hour in the state of a transfer foil for in-mold comprising a substrate, a release layer, a hologram layer, and an aluminum reflective layer. Then, those that did not crack and / or whiten by visual inspection were regarded as acceptable.

  (Hologram Layer Formation) The hologram layer 15 is formed by dispersing or dissolving the above resin and, if necessary, the solvent in a solvent, and using a known coating method such as roll coating, reverse roll coating, gravure coating, comma coating, etc. It may be applied to at least one part and dried to form a coating film. The thickness of the hologram layer 15 is usually about 1 μm to 30 μm, preferably about 2 μm to 20 μm. It may be applied several times.

  (Hologram) Next, on the surface of the hologram layer 15, a predetermined relief structure such as a hologram that exhibits a light diffraction effect is formed and cured. A hologram is a recording of interference fringes due to the interference of light between object light and reference light in an uneven relief shape, such as a laser reproduction hologram such as a Fresnel hologram, a white light reproduction hologram such as a rainbow hologram, There are color holograms utilizing the above principle, computer generated holograms (CGH), holographic diffraction gratings and the like. The relief shape is a concavo-convex shape, and is not particularly limited, and may have a fine concavo-convex shape such as light diffusion, light scattering, light reflection, light diffraction, etc., such as Fourier transform or lenticular lens. , A light diffraction pattern, and a moth eye. Further, although it does not have a light diffraction function, it may be a hairline pattern, a mat pattern, a line pattern, an interference pattern, or the like that expresses a unique glitter.

  As a method for producing these relief shapes, in addition to holograms and diffraction gratings produced using hologram photographing and recording means, holograms produced using an electron beam drawing device based on optical calculations such as interference and diffraction, A diffraction grating can also be mentioned. Also, a relatively large pattern such as a hairline pattern or a line pattern may be a machine cutting method. These holograms and / or diffraction gratings may be recorded single or multiple, or may be recorded in combination. These original plates can be prepared by known materials and methods, and usually, laser beam interference using a glass plate coated with a photosensitive material, using an electron beam drawing apparatus on a glass plate coated with an electron beam resist material. An electron beam drawing method for patterning can be applied.

  (Relief shaping) The relief shape is shaped (also referred to as replication) on the surface of the hologram layer 15. Hologram shaping can be formed by a known method. For example, when recording diffraction gratings or interference fringes of holograms as reliefs of surface irregularities, a master on which the diffraction gratings or interference fringes are recorded in irregularities is pressed. The concave / convex pattern of the original can be duplicated by using it as a mold (referred to as a stamper) and by superimposing the original on the resin layer and heat-pressing both of them with an appropriate means such as a heating roll.

  (Relief Curing) The hologram layer 15 is irradiated with ionizing radiation during or after embossing with a stamper to cure the ionizing radiation curable resin. The ionizing radiation curable resin becomes an ionizing radiation curable resin (hologram layer 15) when cured (reacted) by irradiation with ionizing radiation after the relief is formed. The ionizing radiation may be classified according to the quantum energy of the electromagnetic wave, but in this specification, all ultraviolet rays (UV-A, UV-B, UV-C), visible light, gamma rays, X-rays, electrons It is defined as including a line. Accordingly, ultraviolet (UV), visible light, gamma ray, X-ray, electron beam, or the like can be applied as ionizing radiation, but ultraviolet (UV) is preferable. An ionizing radiation curable resin that cures with ionizing radiation may contain a photopolymerization initiator and / or photopolymerization accelerator in the case of ultraviolet curing, and may not be added in the case of high energy electron beam curing. Can be cured even with thermal energy. When a thermosetting resin is used as the hologram layer 15, it may be cured by aging in a temperature and humidity environment according to the curing conditions of the thermosetting resin to be used. The protective layer 14 may be cured at the same time as the hologram layer 15 or may be cured in advance.

  (Relief pattern) The pattern of the hologram layer 15 is preferably a quasi-continuous pattern. When creating a press mold (referred to as a stamper) for the pseudo continuous pattern, it is only necessary to match a plurality of small relief plates with high accuracy to make the joints inconspicuous, or to fill the joints with resin. In this way, by using a quasi-continuous pattern, the area can be as large as possible, or preferably the entire surface. Further unique design can be improved by synchronizing or matching with any other printed pattern against a large area or entire surface of the hologram pattern. The printed pattern may be appropriately provided on the interlayer or the layer surface by a known printing method or the like, and the printed pattern may be provided on either the in-mold transfer foil and / or the shrink film.

  (Reflection layer) Since the reflection layer 17 is provided on the reflection layer 17 on the relief surface of the hologram layer 15 provided with a predetermined relief structure, the reflection reflection and / or diffraction effect is enhanced. If a rate is higher, it will not specifically limit, For example, a metal thin film can be applied. As the reflective layer 17, a metal layer or a transparent layer is usually applicable. The metal used for the reflective layer 17 is a metal element thin film that has a metallic luster and reflects light, such as Cr, Ni, Ag, Au, Al, etc., and oxides, sulfides, nitrides thereof, etc. A thin film may be used alone or in combination. The formation of the light-reflective metal thin film can be obtained by a vacuum thin film method such as a vacuum deposition method, a sputtering method, or an ion plating method so as to have a thickness of about 10 to 2000 nm, preferably 20 to 1000 nm. However, it can also be formed by plating. If the thickness of the reflective layer 17 is less than this range, the light is transmitted to some extent and the effect is reduced, and if it is more than that, the reflective effect is not changed, which is wasteful in cost.

Further, since the transparent reflecting layer 17 has a substantially colorless and transparent hue and its optical refractive index is different from that of the hologram layer, it is possible to visually recognize the brightness of the hologram or the like even though there is no metallic luster. A transparent hologram can be produced. For example, there are a thin film having a higher refractive index than the hologram layer 15 and a thin film having a lower refractive index. Examples of the former include ZnS, TiO ₂ , Al ₂ O ₃ , Sb ₂ S ₃ , SiO, SnO _2. ITO, etc., and examples of the latter include LiF, MgF ₂ , and AlF ₃ . Preferably, it is a metal oxide or nitride, specifically, Be, Mg, Ca, Cr, Mn, Cu, Ag, Al, Sn, In, Te, Fe, Co, Zn, Ge, Pb, Cd , Bi, Se, Ga, Rb, Sb, Pb, Ni, Sr, Ba, La, Ce, Au, and other oxides or nitrides, and the like can be exemplified by a mixture of two or more thereof. Also, a general light-reflective metal thin film such as aluminum can be used when it has a thickness of 200 mm or less. The transparent metal compound is formed on the relief surface of the hologram layer 15 by vacuum such as vapor deposition, sputtering, ion plating, and CVD so that the thickness of the relief layer of the hologram layer 15 is about 10 to 2000 nm, preferably 20 to 1000 nm. It may be provided by a thin film method or the like.

  (High-Brightness Ink Layer) By providing the high-brightness ink layer 18 on the surface of the reflection layer 17, the reproduced image of the hologram and / or the diffraction grating can be clearly seen. Conventionally, an aluminum metal thin film formed by a vacuum deposition method has been used as a metallic glossy reflection layer, except for a layer that exhibits a special function. In other aluminum foils, for example, rolled, metal gloss as high as that obtained by vacuum thin film method was not obtained. In addition, other metals have a color tone or are expensive. Thus, vacuum-deposited aluminum thin films have been used over a long period of time for a wide range of practical applications. Conventionally, there has been a printing ink that imparts a metallic luster. The ink is a metallic printing ink such as silver or gold using a metal pigment such as aluminum paste or aluminum powder. The aluminum paste has a leafing type and a non-leafing type, but using either of them did not reach the metallic luster of the metal thin film by the vacuum thin film method. Furthermore, although there was an ink using a powder obtained by pulverizing a vapor-deposited aluminum thin film, the surface treatment was different and the dispersibility was poor, and sufficient high luminance could not be obtained.

  The metallic ink layer is a printing layer using a printing ink imparting a metallic luster-like appearance (metallic tone), and is a vapor deposition obtained by pulverizing a vapor-deposited metal film surface-treated with at least an organic fatty acid, methylsilyl isocyanate, or a cellulose derivative. It is a printing layer using the high brightness ink containing the metal film strip. Since it is a printing method, it may be provided partially, and a high-brightness ink reflecting layer can be manufactured at low cost with existing printing equipment. By printing the metallic print layer 17 using a high-brightness ink composed of a metal thin film piece and a binder on the surface of the reflective layer 15, it is possible to exhibit a higher metallic tone and to provide a reflective layer for a light diffraction image. In addition, it is highly designable, and it is possible to easily determine whether it is true or false by visual inspection, so that security is enhanced, small lot production can be handled, and cost can be reduced. In addition, since the high-brightness ink layer 18 is a printing method, if there is another print layer, it is easy to provide a high-brightness ink layer in synchronization with this print pattern. The design effect is further enhanced by providing the printed pattern so as to be synchronized. The term “partial” refers to all patterns such as letters, numbers, symbols, illustrations, patterns, and photographs.

  In addition, an aluminum metal thin film formed by a conventional vacuum deposition method can provide a sufficient metallic luster. However, in order to enhance the design, in order to provide a partial aluminum metal thin film, once the aluminum metal thin film is provided on the entire surface by a vacuum film forming method, a resist is printed and etched in a separate process. The cost is very high, and the number of manufacturing processes increases, making it unsuitable for small lot production. In addition, there is a drawback of whitening when bent at high temperatures. When in-mold injection molding is performed on a three-dimensional surface, the flat transfer foil is stretched along the three-dimensional surface with the injected high-temperature molten resin, and a fine crack is generated in the metal reflective layer, resulting in a decrease in luminance. Or whitening and the hologram cannot be observed.

  However, when the in-mold transfer foil 10 of the present invention is used, the reflective layer 15 and the high-brightness ink layer 18 are used in combination, so that the in-mold transfer foil 10 is stretched at a high temperature while having the same brightness as a hologram having a metal reflective layer. Even in this case, the in-mold transfer foil 10 is difficult to whiten and can transfer a bright hologram onto a three-dimensional surface. The reflective layer 15 is stretched along the three-dimensional surface and cracks are generated. However, the reflective layer 15 is not conspicuous, and the crack portion is assisted by the high-brightness metallic reflection layer of the high-brightness ink layer 18 to maintain the brightness. The high-brightness ink layer 18 is not a thin film like a metal reflection layer, but is a dispersion layer of surface-treated metal vapor-deposited film strips, and even when stretched along a three-dimensional surface, cracks do not occur, Metallic gloss is maintained. Of course, the hologram layer 15 is also stretched along the three-dimensional surface, but the breaking elongation is as large as 5% or more, and no crack is generated. The relief of the hologram is also stretched, but the elongation is such that the light diffraction effect can be maintained, or the fineness may be increased according to the estimated elongation. The substrate 11 is also stretched along the three-dimensional surface, but there is no problem because it has an elongation that can be sufficiently followed.

  (High-brightness ink) By using two layers of the reflective layer 15 and the high-brightness ink layer 18, the light diffraction image of the bright hologram transfer foil layer 15 can be visually recognized. The high-brightness ink is a high-brightness ink having a metallic luster comparable to a metal vapor-deposited film. The surface of the metal vapor-deposited film strip is treated with an organic fatty acid, methylsilyl isocyanate, or a cellulose derivative, and dispersed in the ink. The metallic luster of the ink coating film is made high brightness. The ink is composed of a metal vapor-deposited film strip treated with an organic fatty acid, methylsilyl isocyanate, or a cellulose derivative, a binder, an additive, and a solvent. If necessary, it can be converted into a gravure ink, a screen ink, or a flexo ink. Good.

  As the metal of the metal vapor deposited film strip, aluminum can be applied, but gold, silver, copper, brass, titanium, chromium, nickel, nickel chromium, stainless steel, etc. can also be used as necessary. The thickness of the metal vapor deposition film is preferably 0.01 to 0.1 μm, more preferably 0.03 to 0.08 μm, and the size of the metal vapor deposition film dispersed in the ink is 5 to 25 μm. Is more preferable, and it is 10-15 micrometers more preferably. If the size is less than this range, the brightness of the ink coating will be insufficient, and if it exceeds this range, it will be difficult to enter the gravure plate cell, the screen plate will be clogged easily, and the gloss of the printed coating will decrease. To do.

  The metal vapor deposited film strip is first prepared as a vapor deposited film consisting of polyester film / release layer / deposited film / antioxidation top coat layer on the surface. The release layer and the topcoat layer are not particularly limited, and for example, cellulose derivatives, acrylic resins, chlorinated polypropylene, and the like can be applied. The vapor deposition film is immersed in a solvent, and the metal vapor deposition film is peeled, stirred, filtered and dried to obtain metal vapor deposition film strips. While stirring the metal vapor-deposited film strip at a temperature of 10 to 35 ° C. for about 30 minutes, an organic fatty acid, methylsilyl isocyanate, or a cellulose derivative solution is added, and an organic fatty acid, methylsilyl isocyanate, Or a cellulose derivative is made to adsorb | suck and a metal vapor deposition film strip is surface-treated. As the cellulose derivative, nitrocellulose, cellulose acetate propionate, cellulose acetate butyrate, ethyl cellulose and the like can be applied. When the metal is aluminum, the addition amount of the cellulose derivative is preferably 1 to 20% by mass with respect to the deposited film strip.

  After the surface treatment, the metal vapor-deposited film strips are separated, or the metal vapor-deposited film strip slurry is blended and dispersed in a binder and a solvent as they are to make an ink. As the binder, known inks may be used, and examples thereof include (meth) acrylic resin, polyester, polyamide, polyurethane, shellac, and alkyd resin. If necessary, additives such as coloring pigments, dyes, waxes, plasticizers, leveling agents, surfactants, dispersants, antifoaming agents, and chelating agents may be added to the ink. As the ink solvent, known ink solvents can be used, for example, aromatic hydrocarbons such as toluene and xylene, aliphatic or alicyclic hydrocarbons such as n-hexane and cyclohexane, ethyl acetate, acetic acid, and the like. Examples thereof include esters such as propyl, alcohols such as methanol, ethanol and IPA, ketones such as acetone and MEK, alkylene glycol monoalkyl ethers such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether.

  Ordinary inks are kneaded by a roll mill, a ball mill, or the like, and the pigment additive is finely dispersed to sub-micron and highly dispersed to give printability. However, the high-intensity ink used in the present invention does not require a kneading step, and can be dispersed only by mixing with a stirrer, and the metallic luster is not impaired. That is, in order to develop a high-brightness metallic luster, the metal vapor-deposited film strip needs to have a size of about 5 to 25 μm, and when the kneading step is performed, the metallic luster is extremely lowered.

  (High-brightness ink printing) If the ink obtained as described above is made by known gravure printing, screen printing, or flexographic printing, the required pattern is made, printed, dried, and cured if necessary. Good.

  (Adhesive layer) The adhesive layer 19 is provided on the surface of the high-brightness ink layer 18, that is, the surface facing the transfer target. As the material of the adhesive layer 19, a known heat-sensitive adhesive which melts or softens when heated and exhibits an adhesive effect can be applied. Specifically, vinyl chloride vinyl acetate copolymer resin, acrylic resin, polyester Based resins and the like. The material resin is dissolved or dispersed in a solvent, an additive such as a pigment is added as appropriate, and it is applied by a method such as known roll coating or gravure coating and dried to have a thickness of about 0.1 to 30 μm, preferably Is a layer of 0.5 to 10 μm. As the material of the adhesive layer 19, a known heat-sensitive adhesive that melts or softens when heated and exhibits an adhesive effect can be applied. Specifically, a vinyl chloride vinyl acetate copolymer resin, an acrylic resin, a polyester-based resin can be used. Resin etc. are mentioned. The material resin is dissolved or dispersed in a solvent, an additive such as a pigment is added as appropriate, and it is applied and dried by a known method such as roll coating or gravure coating to form a layer having a thickness of 0.1 μm to 30 μm. obtain.

  (Hard Coat Layer) As shown in FIG. 2, a hard coat layer 12 and / or a print layer 16 may be provided as necessary. The hard coat layer 12 is provided between the release layer 13 and the hologram layer 15, and after the transfer, covers the surface of the hologram layer 15 to become a protective layer, and has no use or expiration date in extremely harsh environments. Even when used for a long time, and / or repeatedly used many times, it is protected from solvents and mechanical friction and abrasion, particularly scratching, and imparts durability that is not easily damaged.

  (Hard Coat Layer) The hard coat layer 12 contains a cured product of ionizing radiation curable resin and polyethylene wax. As the ionizing radiation curable resin and polyethylene wax, the material used for the hologram layer 15 can be preferably used. (1) isocyanates having 3 or more isocyanate groups in the molecule, (2) polyfunctional (meth) acrylates having at least one hydroxyl group and at least two (meth) acryloyloxy groups in the molecule, or (3) Using an ionizing radiation curable resin containing a urethane (meth) acrylate oligomer that is a reaction product of a polyhydric alcohol having at least two hydroxyl groups in the molecule, including polyethylene wax, coating and drying. And curing with ionizing radiation. Examples of the polyethylene wax include polyethylene resin particles and beads, and spherical beads are preferable. However, when polyethylene wax is added, the foil breakage is reduced, so the amount added is about 0.01 to 10 parts by weight, preferably 0.1 to 5 parts by weight, with respect to 100 parts by weight of ionizing radiation curable resin. And

  (Formation of hard coat layer) The hard coat layer 12 is formed by adding polyethylene wax to the above-mentioned ionizing radiation curable resin, and if necessary, adding a photopolymerization initiator, a plasticizer, a stabilizer, a surfactant and the like to the solvent. It may be dispersed or dissolved, applied by a known coating method such as roll coating, gravure coating, comma coating or die coating, dried, and reacted (cured) with ionizing radiation. Further, when the hard coat layer 12 is thick, it may be formed in a plurality of times.

  (Thickness of hard coat layer) The thickness of the hard coat layer 12 is usually about 1 to 10 μm. However, in the present invention, the use in an extremely harsh environment, the expiration date is not used, and the use is performed for a long time. In order to protect from solvent and mechanical friction and wear, especially scratching, and to impart durability that is difficult to be scratched even when used repeatedly many times, it is preferably 10 μm or more, and preferably 15 μm or more. The upper limit is not particularly limited, but is about 30 μm or less in view of price and foil breakability. When the hard coat layer 12 is provided, since the hard coat layer 12 containing polyethylene wax is formed on the outermost surface, the hologram layer 15 may not contain polyethylene wax. The hard coat layer 12 and / or the hologram layer 15 may be colored transparently.

  In the case where the hard coat layer 12 is provided, the hard coat layer 12 / the hologram layer 15 are two layers, the breaking elongation at 23 ° C. after ionizing radiation curing is 5% or more, and the base material, release layer, hard In-mold transfer foil provided with a coat layer, hologram layer, reflection layer, high-brightness ink layer, and adhesive layer so as to have heat resistance that does not whiten even if left in an atmosphere at 150 ° C. for 1 hour. .

  The print layer 16 is provided between the reflective layer 17 and the high-brightness ink layer 18, and can be transparently colored on the entire surface or printed with a pattern. In addition, the design effect can be further enhanced if the printed pattern such as letters, numbers, symbols, illustrations, patterns, and photographs is printed on the hologram pattern or the pattern of the high-brightness ink layer 18 in synchronization. In this way, substrate 11 / release layer 13 / hard coat layer 12 (if necessary) / hologram layer 15 / reflection layer 17 / printing layer 16 (if necessary) / high brightness ink layer 18 / adhesion The in-mold transfer foil 10 of the present invention having the layer structure of the layer 19 is obtained.

(Modification) The present invention includes the following modifications.
If the hologram layer 15 is not formed with a predetermined relief structure that produces a light diffraction effect such as a hologram, and if necessary, the reflection layer 17 and / or the high-brightness ink layer 18 is not provided, It can also be a hard coat transfer foil. The hard coat transfer foil can be produced by an in-mold injection molding method in which a hard coat layer is transferred to a three-dimensional surface. Heat resistance that does not whiten by heat, good conformity to expansion and contraction, and can transfer a hard coat layer with excellent surface properties to a three-dimensional surface, use in extremely harsh environments, no expiration date, long-term use, and / or Or, it can be protected from solvent and mechanical friction and abrasion, especially scratching, and can be given durability that is hard to be damaged even when used repeatedly many times.

  (In-mold injection molding) Thus, the in-mold transfer foil 10 of the present invention can be prepared. Using the in-mold transfer foil 10, a molded product in which a hologram is transferred to a three-dimensional surface can be manufactured by an in-mold injection molding method. First, (2) the in-mold transfer foil 10 is inserted into an injection mold, and (3) a resin is injection-molded and brought into close contact with the injection mold, and the in-mold transfer onto the surface of the resin. A known method may be used in which the hologram of the foil 10 is transferred, (4) after cooling, the mold is released, the base material 11 and the release layer 13 of the in-mold transfer foil are peeled off, and the molded product is taken out. Although a part of the release layer 13 may remain on the hologram layer 15 side, there is no hindrance to peeling, and it is within the scope of the present invention.

  (Injection Molded Product with Hologram) In this way, the release layer 13 and the hologram layer 15 are used as the in-mold transfer foil 10 using a specific material, and the in-mold injection molding method is applied to the three-dimensional surface, and the hologram itself is heated. It is possible to manufacture a molded article with a hologram to which a hologram having excellent design properties with excellent heat resistance that does not whiten and excellent conformability to expansion and contraction, and extremely little cracking or whitening. In addition, the in-mold transfer foil 10 can be further improved in unique design characteristics in combination with other arbitrary printed patterns with the hologram pattern as a background.

(Injection Molded Product) The material of the injection resin is not particularly limited, and may be a known resin that can be an injection resin such as polystyrene, polyethylene terephthalate, polypropylene, and acrylic resin.
The shape of the injection-molded product is not particularly limited, and can be applied as long as at least one part has a three-dimensional part. The three-dimensional portion may be a secondary surface or a tertiary surface, and includes a wave shape, a curved surface shape, a polyhedron shape, a circle or a pyramid shape, a spherical shape, and the like, or a combination of these, or a random shape. The molded product by injection molding can be used for equipment bodies such as daily necessities and daily necessities, containers for food and various articles, electronic equipment such as mobile phones, and housings such as office supplies.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this. In addition, except a solvent, each composition of each layer is a mass part of solid content conversion.

Example 1 Using a PET film having a thickness of 25 μm as the base material 11, a TCM01 medium (manufactured by Dainippon Ink Co., Ltd., melamine resin product name) coating liquid is applied to one surface of the base material 11 by a gravure coating method. After being dried, it was applied to a thickness of 2 μm, dried, and baked at 180 ° C. for 20 seconds to form a release layer 13.
The surface of the release layer 13 was coated with the following ionizing radiation curable resin composition with a gravure reverse coater so that the thickness after drying was 2 μm and dried at 100 ° C.
・ <Procedure for producing ionizing radiation curable resin composition>
First, “ionizing radiation curable resin composition M” was produced by the following procedure. A reactor equipped with a stirrer, reflux condenser, dropping funnel and thermometer was charged with 206.1 g of ethyl acetate and 133.5 g of isophorone diisocyanate trimer (HULS product, VESTANAT T1890, melting point 110 ° C.), 80 The solution was heated to 0 ° C. and dissolved. After air was blown into the solution, 0.38 g of hydroquinone monomethyl ether, 249.3 g of pentaerythritol triacrylate (product of Osaka Organic Chemical Industry Co., Ltd., Biscoat 300) and 0.38 g of dibutyltin dilaurate were charged. After reacting at 80 ° C. for 5 hours, 688.9 g of ethyl acetate was added and cooled.
The “ionizing radiation curable resin composition M”, a film-forming resin (acrylic oligomer), a reactive silicone, a polyethylene wax, a photopolymerization initiator, and a solvent are blended in the following composition to form an ionizing radiation curable resin. A composition was prepared.
・ <Ionizing radiation curable resin composition of hologram layer>
“Ionizing radiation curable resin composition M” 25 parts by mass Methacrylate oligomer (manufactured by Nippon Synthetic Chemical Co., Ltd., trade name Murasaki 6630B) 5 parts by weight of reactive silicone (manufactured by Shin-Etsu Chemical Co., Ltd., trade name X-22-2445) 0. 15 parts by mass Polyethylene wax (average particle size 3 μm, spherical) 0.6 parts by mass Photopolymerization initiator (Ciba, trade name Irgacure 184) 1.5 parts by mass Ethyl acetate 70 parts by mass Next, to the layer surface, 2 From a fine concavo-convex pattern, a press die with a pseudo-continuous pattern duplicated by a 2P method from a diffraction grating by the beam interference method is attached to an embossing roller of a duplicating apparatus, and heated and pressed (embossed) with an opposing roller. A relief was formed. Immediately after the shaping, the hologram layer 15 was formed by irradiating and curing with ultraviolet rays using a high-pressure mercury lamp.
On the relief surface of the hologram layer 15, titanium oxide having a thickness of 50 nm was formed by a vacuum vapor deposition method to obtain a reflective layer 17.
Using a fine wrap super metallic silver ink (manufactured by Dainippon Ink & Chemicals, Inc., trade name of high-brightness ink), printed on the surface of the reflective layer 17 by gravure printing so that the thickness after drying is 2 μm. A high-brightness ink layer 18 was formed.
The surface of the high-brightness ink layer 18 was coated with TM-A1HS (trade name, manufactured by Dainichi Seika Co., Ltd.) as a bonding layer composition using a gravure coater so that the coating amount after drying was 1 μm, and dried at 100 ° C. Then, the adhesive layer 19 is formed, and the transfer foil for in-mold of Example 1 having the layer structure of the base material 11 / the release layer 13 / the hologram layer 15 / the reflective layer 17 / the high brightness ink layer 18 / the adhesive layer 19 is formed. 10 was obtained.

(Example 2) A PET film having a thickness of 25 μm was used as the base material 11, and a melamine resin coating solution was applied to one surface of the base material 11 by a gravure coating method so that the dry thickness was 2 μm. Then, the release layer 13 was formed by drying.
The surface of the release layer 13 is coated with the following ionizing radiation curable resin composition with a gravure reverse coater so that the thickness after drying is 4 μm, dried at 100 ° C., and then irradiated with ultraviolet light using a high-pressure mercury lamp. Was hardened by irradiation to form a hard coat layer 12.
・ <Ionizing radiation curable resin composition of hard coat layer>
“Ionizing radiation curable resin composition M” 30 parts by mass Methacrylate oligomer (manufactured by Nippon Synthetic Chemical Co., Ltd., trade name: Purple Light 7510B) 5 parts by mass Polyethylene wax (average particle size 5 μm, spherical) 0.7 parts by mass Photopolymerization initiator (Ciba, trade name Irgacure 907) 1.75 parts by mass Solvent (ethyl acetate: methyl isobutyl ketone = 1: 1) 70 parts by mass Gravure the following ionizing radiation curable resin composition onto the 12 surface of the hard coat layer. The hologram layer 15 was formed by coating and drying at 100 ° C. so that the thickness after drying with a reverse coater was 2 μm.
・ <Ionizing radiation curable resin composition of hologram layer>
“Ionizing radiation curable resin composition M” 25 parts by mass Methacrylate oligomer (manufactured by Nippon Synthetic Chemical Co., Ltd., trade name: Murasakimitsu 7510B) 5 parts by mass of reactive silicone (manufactured by Shin-Etsu Chemical Co., Ltd., trade name: X-22-1602) 2 parts by mass Photopolymerization initiator (trade name Irgacure 907, manufactured by Ciba) 1.75 parts by mass Ethyl acetate 70 parts by mass Next, the hologram layer 15 was duplicated from the diffraction grating by the two-beam interference method by the 2P method. A stamper having a quasi-continuous pattern was attached to an embossing roller of a duplicating apparatus, and heated and pressed (embossed) with an opposing roller to form a relief having a fine uneven pattern. Immediately after shaping, it was cured by irradiating with ultraviolet rays using a high-pressure mercury lamp.
A reflective layer 17 was formed by forming a 50 nm thick titanium oxide thin film on the relief surface of the hologram layer 15 by vacuum deposition.
A printing layer 16 was formed on the surface of the reflective layer 17 by using a known transparent yellow ink and printing on the entire surface by a known gravure printing method.
Using a fine wrap super metallic silver ink (manufactured by Dainippon Ink & Chemicals, Inc., trade name of high-brightness ink) on the surface of the printing layer 16, printing is performed by a gravure printing method so that the thickness after drying becomes 2 μm. A high-brightness ink layer 18 was formed.
The surface of the high-brightness ink layer 18 was coated with TM-A1HS (trade name, manufactured by Dainichi Seika Co., Ltd.) as a bonding layer composition using a gravure coater so that the coating amount after drying was 1 μm, and dried at 100 ° C. Then, the adhesive layer 19 is formed, and is composed of the base material 11 / peeling layer 13 / hard coat layer 12 / hologram layer 15 / reflective layer 17 / printing layer 16 / high brightness ink layer 18 / adhesive layer 19 In-mold transfer foil 10 of Example 2 was obtained.

(Evaluation) The hologram layers before curing in Examples 1 and 2 were all in a finger dry state and could be wound up, and the subsequent steps could be rolled to roll.
The breaking elongation of the hologram layer 15 of Example 1 was 31%, and in Example 2, the breaking elongation of the hard coat layer 12 and the hologram layer 15 was 31%.
The heat resistance of the in-mold transfer foil 10 was 170 ° C. in Example 1 and 170 ° C. in Example 2.

(Examples 3 to 4)
<Injection molding> The in-mold transfer foil 10 of Examples 1 and 2 was inserted (inserted) into the automatic foil feeder of the injection molding apparatus so that the adhesive layer surface was on the molding resin side, and Sumipex STH-55 (Sumitomo Chemical) Acrylic resin product name, manufactured by the company, was injection molded under normal conditions of a melting temperature of 250 ° C and a mold temperature of 80 ° C. After cooling, the mold was released, the substrate 11 was peeled off, and the molded article with hologram using the in-mold transfer foil of Examples 3 to 4 was obtained.
The injection molding was continuously performed with a molding cycle of 12 seconds. The obtained molded article has a three-dimensional shape (a member of a CD player having a diameter of 150 mm with a 5 mm border and a central portion raised in a spherical shape). The in-mold transfer foil 10 followed the molded product as well as the spherical surface portion and the edge portion, and the hologram was transferred onto the surface of the acrylic resin. The hologram was not whitened by the heat of injection molding, had good followability to the spherical surface portion, was free of cracks and whitening, and was transferred to a three-dimensional surface with excellent design.

It is sectional drawing of the transfer foil for in-mold which shows one Example of this invention. It is sectional drawing of the transfer foil for in-mold which shows one Example of this invention. It is sectional drawing of the molded article transcribe | transferred using the transfer foil for in-mold of this invention.

Explanation of symbols

10: Transfer foil for in-mold 11: Base material 12: Hard coat layer 13: Release layer 15: Hologram layer 17: Reflective layer 18: High brightness ink layer 19: Adhesive layer 100: Molded product

Claims (3)

In a transfer foil for in-mold, in which a release layer, a hologram layer, a reflection layer, a high-brightness ink layer, and an adhesive layer are provided on one surface of the base material and the base material, the release layer is a melamine resin The hologram layer includes a cured product of ionizing radiation curable resin, reactive silicone, and polyethylene wax, and the high-brightness ink layer includes a metal vapor-deposited thin film surface-treated with at least an organic fatty acid, methylsilyl isocyanate, or a cellulose derivative. A transfer foil for in-mold, characterized by The hologram layer is (1) the coating film before ionizing radiation curing is in a finger-dried state, (2) the elongation at break at 23 ° C. after ionizing radiation curing is 5% or more, and (3) the substrate and mold release A heat resistance that does not cause whitening even when left in a 150 ° C. atmosphere in an in-mold transfer foil state in which a layer, a hologram layer, a reflective layer, a high-brightness ink layer, and an adhesive layer are provided. The transfer foil for in-mold according to 1. A molded product produced by an in-mold injection molding method using the in-mold transfer foil according to claim 1.

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