KR102237481B1 - Manufacturing method of deco-film for housing of smart phone thermal transfer-ink ribbon having patterned layer and the deco-film for housing of smart phone manufactured by the same - Google Patents

Abstract

The present invention comprises the steps of sequentially laminating a release layer, a first primer layer, a pattern printing layer, and a second primer layer to prepare a thermal transfer pattern ink ribbon including a thermal transfer pattern ink film having a total thickness of 1 to 2 μm; Positioning the thermal transfer pattern ink ribbon on the smartphone housing substrate so that the second primer layer of the thermal transfer pattern ink film faces the smartphone housing substrate; By performing a thermal transfer process using a thermal transfer head to which a voltage of 200 to 210 V is applied at a pulse rate per second (pps) of 90 to 105, a second primer layer, a pattern printing layer on the smartphone housing substrate And forming a first primer layer, wherein the substrate for the smartphone housing is a polyester-based substrate, and the second primer layer includes a vinyl polysiloxane resin, and the substrate for the smartphone housing and the second primer A method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer that can improve esthetics and visibility and simplify the process and reduce the process time by improving the interfacial properties between the layers, and the smart manufactured thereby It relates to a deco film for phone housing.

Description

Manufacturing method of deco-film for housing of smart phone thermal transfer-ink ribbon having patterned layer and the deco- film for housing of smart phone manufactured by the same}

The present invention is a decor for a smartphone housing manufactured by a method of manufacturing a deco film for a smartphone housing using a fine pattern ink ribbon for thermal transfer that can simplify the process and reduce the process time, and improve the aesthetics and visibility of the design. It is about the film.

In recent years, smartphones, tablet PCs, and vehicle navigations in housings with film-based designs have been popularized.In addition, in order to protect the internal parts of the product and maximize the differentiation of the design, a company logo, gradient decoration, or A decoration film (deco film) printed with an input button is widely used. These deco films are usually made of synthetic resin and have low hardness, so scratches such as scratches are easily generated due to external impact. Accordingly, in recent years, not only the protection of the product, but also the development of technology for a deco film for improving aesthetics has been actively made.

Such a deco film is a situation in which a variety of colors, gloss, and patterns (that is, patterns) of the film are required to suit the tastes of modern people with various personalities.

Accordingly, Korean Patent Registration No. 10-1277727 attempts to implement a desired design by providing a UV pattern layer in which an arbitrary pattern is directly designed under the base film for projection, diffusion, and reflection of light.

However, in the case of this prior art, since a separate drying process is required, not only the process is complicated, but also the process time is long. In addition, since the thickness of the UV pattern layer must be formed to a thickness of several tens of micrometers in order to improve aesthetics and visibility, it is difficult to perform by adding other additional processes for imparting color and patterning.

Korean Patent Registration No. 10-1277727

The present invention has been devised in consideration of the above points, and a pattern ink ribbon for thermal transfer that can simplify the process and reduce the process time, and improve sufficient aesthetics and visibility even with a thin thickness of several micrometers or less. It is intended to provide a method of manufacturing a deco film for a smartphone housing using and a deco film for a smartphone housing manufactured thereby.

One embodiment of the present invention is a pattern ink ribbon for thermal transfer including a pattern ink film for thermal transfer having a total thickness of 1 to 2 μm by sequentially laminating a release layer, a first primer layer, a pattern printing layer, and a second primer layer. Preparing; Positioning the thermal transfer pattern ink ribbon on the smartphone housing substrate so that the second primer layer of the thermal transfer pattern ink film faces the smartphone housing substrate; By performing a thermal transfer process using a thermal transfer head to which a voltage of 200 to 210 V is applied at a pulse rate per second (pps) of 90 to 105, a second primer layer, a pattern printing layer on the smartphone housing substrate And forming a first primer layer, wherein the substrate for the smartphone housing is a polyester substrate, and the second primer layer includes a vinyl polysiloxane resin, and the substrate for the smartphone housing and the second primer It is configured to improve the interfacial characteristics between the layers, wherein the pattern printing layer is formed in a pattern in which a plurality of wave shapes are formed at predetermined intervals in a vertical direction, and the wave shape is formed as a pattern implemented as a hologram. It provides a method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon.

The thermal transfer pattern ink film is formed by further forming a deposition layer between the pattern printing layer and the first primer layer in order to control transmittance or reflectance, and the deposition layer is indium, chromium, tin, silicon, titanium, and One or more deposition components selected from the group consisting of mixed components may be deposited to a thickness of 10 to 150 Å.

The smartphone housing substrate is a polyester substrate containing polyimide, and the second primer layer is a vinyl polysiloxane resin formed by reacting an amine-modified colloidal silica with a vinyl monomer containing a carboxyl group, an acrylic compound, and It may be a mixture of the polyurethane aqueous dispersion in a weight ratio of 2:2:1.

Forming a photocurable resin layer by applying a photocurable resin composition to the pattern printing layer; In order to engrave the pattern, the pattern of the mold device roller is rotated in close contact with the photocurable resin layer, thereby transferring the pattern of the mold device roller to the photocurable resin layer by rotating the mold device roller for making a pattern in which the pattern is engraved on the outer surface of the body. step; And irradiating UV light to the photocurable resin layer having the transferred pattern to cure the photocurable resin layer, and the photocurable resin composition is a photoreactive monomer and a photoreactive oligomer 1 to 100 parts by weight of the photoreactive mixture mixed in a weight ratio of 1 to 1.5, and 0.5 to 2 parts by weight of a photoinitiator and 50 to 80 parts by weight of an organic solvent are included, and the photocurable resin layer has a thickness of 0.5 to 2 μm It may be to have.

Another embodiment of the present invention provides a deco film for a smartphone housing manufactured by the method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer according to the embodiment of the present invention.

A method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer according to an embodiment of the present invention is a pattern using a pattern ink ribbon for thermal transfer including a pattern ink film for thermal transfer having a total thickness of 1 to 2 μm. Since the printed layer is thermally transferred, there is an effect that additional heat treatment and drying processes are not required. Accordingly, there is an effect of simplifying the process and reducing the process time.

In addition, since the pattern ink film for thermal transfer having a total thickness of 1 to 2 μm realizes sufficiently clear texture and pattern, there is an effect of transferring a very thin pattern printing layer to a substrate for a smartphone housing.

In addition, since both sides of the pattern printing layer are laminated with a first primer layer and a second primer layer, respectively, there is an effect of being able to be transferred to a substrate for a smartphone housing with very excellent adhesion.

Accordingly, a deco film for a smartphone housing manufactured by the method of manufacturing a deco film for a smartphone housing using the pattern ink for thermal transfer has an effect of greatly improving aesthetics and visibility.

1 shows an actual image of a pattern ink ribbon for thermal transfer including a pattern ink film for thermal transfer used in the present invention, and a schematic cross-sectional view of the pattern ink film for thermal transfer.
2 is a schematic cross-sectional view of a pattern ink film for thermal transfer further including a deposition layer.
3 shows an actual image after thermal transfer of the pattern ink film for thermal transfer used in the present invention on a substrate for a smartphone housing.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention is a pattern ink ribbon for thermal transfer including a pattern ink film for thermal transfer having a total thickness of 1 to 2 μm by sequentially laminating a release layer, a first primer layer, a pattern printing layer, and a second primer layer. Preparing; Positioning the thermal transfer pattern ink ribbon on the smartphone housing substrate so that the second primer layer of the thermal transfer pattern ink film faces the smartphone housing substrate; By performing a thermal transfer process using a thermal transfer head to which a voltage of 200 to 210 V is applied at a pulse rate per second (pps) of 90 to 105, a second primer layer, a pattern printing layer on the smartphone housing substrate And it provides a method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer comprising the step of forming a first primer layer.

The actual image of the pattern ink ribbon for thermal transfer including the pattern ink film for thermal transfer used in the present invention and a schematic cross-sectional view of the pattern ink film for thermal transfer are shown in FIG. 1.

At this time, the substrate for the smartphone housing is a polyester substrate, and the second primer layer is made of vinyl polysiloxane resin, so that the interface characteristics between the substrate for the smartphone housing and the second primer layer are greatly improved. Can be. Therefore, it is possible to transfer a pattern printing layer having a very thin thickness than the conventional one, which can realize a clear texture and pattern with very excellent adhesion, to a substrate for a smartphone housing. As a result, there is an effect of remarkably improving the aesthetics and visibility of the deco film for a smartphone housing.

In addition, the thermal transfer pattern ink film may be formed by further forming a deposition layer between the pattern printing layer and the first primer layer in order to control transmittance or reflectance. In this case, the deposition layer may be formed by depositing at least one deposition component selected from the group consisting of indium, chromium, tin, silicon, titanium, and a mixture thereof to a thickness of 10 to 150 Å. A schematic cross-sectional view of a pattern ink film for thermal transfer further including such a deposition layer is shown in FIG. 2.

In addition, the actual image after thermal transfer of the pattern ink film for thermal transfer used in the present invention on a substrate for a smartphone housing is shown in FIG. 3. As can be seen in FIG. 3, the transmittance or reflectance is adjusted, so that various and clear patterns can be implemented according to the viewing point of view.

Hereinafter, a method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer according to an embodiment of the present invention will be described in more detail.

First, a step of preparing a pattern ink ribbon for thermal transfer including a thermal transfer pattern ink film having a total thickness of 1 to 2 μm by sequentially laminating a release layer, a first primer layer, a pattern printing layer, and a second primer layer is described. do.

A method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer according to an embodiment of the present invention is a pattern using a pattern ink ribbon for thermal transfer including a pattern ink film for thermal transfer having a total thickness of 1 to 2 μm. There are important technical features for thermal transfer of the printed layer. Therefore, there is no need for an additional heat treatment and drying process, thereby simplifying the process and reducing the process time.

In addition, the pattern ink film for thermal transfer having a total thickness of 1 to 2 μm can implement a clear texture and pattern, and has an effect of transferring a very thin pattern printing layer to a substrate for a smartphone housing. Accordingly, it is possible to greatly improve the operating sensitivity of the smartphone housing requiring touch manipulation or the like.

In addition, the method of manufacturing a deco film for a smartphone housing using the thermal transfer pattern ink ribbon has a very thin thickness of the transferred pattern printing layer to impart the texture and pattern, so that other processes for improving aesthetics and visibility are performed. You will be able to add it.

For example, it is possible to additionally perform a process of implementing a color on the deco film for a smartphone housing. More specifically, a method of manufacturing a deco film for a smartphone housing using a pattern ink for thermal transfer according to an embodiment of the present invention may further include forming a color printing layer having excellent color development power. The additional process for improving the aesthetics and visibility may be performed by processes generally used in the art according to the needs of consumers, and the specific type of the process is not particularly limited.

Next, a step of positioning the thermal transfer pattern ink ribbon on the smartphone housing substrate so that the second primer layer of the thermal transfer pattern ink film faces the smartphone housing substrate.

The substrate for the smartphone housing used in the present invention may be used without limitation as long as it is a material suitable for thermal transfer. For example, polypropylene (PP), polyethylene (PE), polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), polyoxymethylene (POM), polyamide ( PA), polypropylene oxide (PPO), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), polytetrafluoroethylene (PTFE) , At least one selected from the group consisting of polyetheretherketone (PEEK), polyphenylene sulfide (PPS), polyimide (PI), polyamide-imide (PAI), polyethyleneimine (PEI), and mixtures thereof It may include.

More preferably, the substrate for the smartphone housing is a polyethylene terephthalate (PET) substrate, and at this time, one surface of the substrate for the smartphone housing may be laminated with a primer layer containing polyimide. As a result, there is an effect that the pattern printing layer that implements a clear texture and pattern can be easily transferred to a substrate for a smartphone housing.

In addition, the substrate for the smartphone housing may be applied very effectively to a substrate for a curved smartphone housing by using a polyester substrate containing polyimide.

In addition, the second primer layer bonded to the substrate for the smartphone housing comprises a vinyl polysiloxane resin formed by reacting an amine-modified colloidal silica with a vinyl monomer containing a carboxyl group, and an acrylic compound and a polyurethane aqueous dispersion. Mixtures in a weight ratio of :1 can be used. Thereby, the polyimide of the primer layer laminated on one surface of the substrate for the smartphone housing; Alternatively, by excellently bonding with the polyimide of the polyester-based substrate including the polyimide, the interface characteristics between the substrate for the smartphone housing and the second primer layer can be improved. In addition, even with a very thin thickness, it may have sufficiently excellent adhesion and thermal transfer properties.

The vinyl polysiloxane resin may preferably be formed by reacting an amine-modified colloidal silica with a vinyl monomer including a carboxyl group.

The amine-modified colloidal silica comprises colloidal silica with a compound selected from condensation polymers N-[3-(trimethoxysilyl)propyl] polyethyleneimine highhydrochloride and N-[3-(trimethoxysilyl)propyl] polyethyleneimine What was reacted directly can be used. Thereafter, the vinyl polysiloxane resin may be obtained by reacting the amine-modified colloidal silica with a vinyl monomer containing a carboxyl group.

At this time, the vinyl monomer including the carboxyl group includes an acrylic acid derivative or a methacrylic acid derivative, and for example, selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, vinyl acetic acid, vinyl propionic acid, and mixtures thereof. More than one type may be used.

In addition, the acrylic compound is based on 100 parts by weight of an acrylic monomer mixture comprising a methacrylic acid ester monomer and an ethylenic monomer in a weight ratio of 2:1, 10 to 25 parts by weight of a petroleum resin containing an acrylic group, and 1 to 10 surfactants. By using a polymerization reaction by adding 150 to 200 parts by weight of water and 0.1 to 0.5 parts by weight of a polymerization initiator, the above-described effect can be further improved.

In addition, the polyurethane water dispersion, based on 100 parts by weight of poly(1,4-butanediol adipate), 30 to 50 parts by weight of polycaprolactone diol, 1 ,6-hexanediol (1,6-hexanediol) 10 to 30 parts by weight, dimethylolpropionic acid (Dimethylolpropionic acid) 10 to 15 parts by weight and isophorone diisocyanate (Isophorone diisocyanate) 70 to 90 parts by weight reaction to prepare a polyurethane prepolymer Prepared and neutralized by adding 5 to 7 parts by weight of triethylamine to the prepolymer, and then adding 200 to 500 parts by weight of water to disperse it, and then adding 2 to 5 parts by weight of ethylenediamine to extend the chain. It is possible to improve the interface characteristics between the smartphone housing substrate and the second primer layer, and have sufficiently excellent adhesion and thermal transfer characteristics even with a very thin thickness.

In addition, the second primer layer may further include a crosslinking accelerator to further improve adhesion to the substrate for the smartphone housing. These crosslinking accelerators are generally used in the art, and the kind is not particularly limited, but, for example, tetraalkyl titanate, zirconate, zinc octoate, and zinc resin At least one selected from the group consisting of zinc resinate, oxazoline, and mixtures thereof may be preferably used. In addition, the crosslinking accelerator is included in an amount of 1 to 10 parts by weight based on 100 parts by weight of a mixture of a vinyl polysiloxane resin, an acrylic compound, and an aqueous polyurethane dispersion at a weight ratio of 3:1:1. Can be further improved.

Next, by performing a thermal transfer process using a thermal transfer head to which a voltage of 200 to 210 V is applied at a pulse rate per second (pps) of 90 to 105, on the substrate for the smartphone housing, a second primer layer, A step of forming the pattern printing layer and the first primer layer will be described.

A method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer according to an embodiment of the present invention uses a thermal transfer head in which a voltage of 200 to 210 V is applied at a pulse rate per second (pps) of 90 to 105 Thus, by performing the thermal transfer process, there is an effect of transferring a pattern printing layer of a very thin thickness that implements a clear texture and pattern to a substrate for a smartphone housing with very excellent adhesion. In addition, since it is transferred to the substrate for the smartphone housing in a very thin thickness, the operating sensitivity of the smartphone housing requiring touch manipulation or the like can be greatly improved. In addition, there is an effect that the first primer layer can be very easily separated from the release layer.

More specifically, the thermal transfer process is ^{performed at a rate of 0.1 to 2.0 inch/sec at a pressure in the range of 300 to 350 kgf/mm 2} and a temperature in the range of 80 to 105° C., and the above effects can be further improved, as well as Excellent coating film hardness can be ensured.

In addition, the pattern printing layer is a step of forming a photocurable resin layer by applying a photocurable resin composition; In order to engrave a pattern in which a plurality of wave shapes are formed at predetermined intervals in the vertical direction, and the wave shape is implemented as a hologram, the photo-curable mold device roller for pattern production is formed by engraving the pattern on the outer surface of the body. Transferring the pattern of the mold device roller to the photocurable resin layer by rotating it in close contact with the resin layer; And curing the photocurable resin layer by irradiating UV light to the photocurable resin layer having the transferred pattern.

At this time, the photocurable resin composition includes 0.5 to 2 parts by weight of a photoinitiator and 50 to 80 parts by weight of an organic solvent based on 100 parts by weight of the photoreactive mixture obtained by mixing a photoreactive monomer and a photoreactive oligomer in a ratio of 1: 1 to 1.5 It is good to use what you do. Accordingly, there is an effect that the applied thickness is thin and constant, and a clear pattern can be formed between the first primer layer and the second primer layer without changing optical properties.

More specifically, it is preferable that the photocurable resin layer has a thickness of 0.5 to 2 μm.

In addition, the photoreactive oligomer may further improve the above effects by using those having a weight average molecular weight of 1,000 to 50,000.

In addition, the photoreactive monomer and photoreactive oligomer are at least one selected from the group consisting of silicone acrylate, urethane acrylate, epoxy acrylate, polyester acrylate, polyether acrylate, and mixtures thereof. Monomers and oligomers can be used. More specifically, one or more oligomers selected from the group consisting of silicone acrylate-based photoreactive monomers, urethane acrylate-based, epoxy acrylate-based, polyester acrylate-based, polyether acrylate-based, and mixtures thereof are described above. By using the mixture in one content range, it is possible to improve adhesion and form a pattern printing layer having excellent surface hardness.

The photoinitiator is a general used in the art, and its kind is not particularly limited, but, for example, benzoin methyl ether, 2,4,6-trimethylbenzoyl diphenylphosphine oxide, bis(2,4,6-trimethyl) Benzoyl) phenylphosphine oxide, α,α-methoxy-α-hydroxyacetophenone, 2-benzoyl-2-(dimethylamino)-1-[4-(4-morphonyl) phenyl]-1-butanone , 2,2-dimethoxy-2-phenylacetophenone, and at least one selected from the group consisting of mixtures thereof may be preferably used.

The organic solvent is generally used in the art, and its kind is not particularly limited, but, for example, hexane, octane, decane, isodecane, cyclohexane, methylcyclohexane, toluene, xylene, ethylbenzene, ether solvent And at least one hydrocarbon-based solvent selected from the group consisting of a mixture thereof; At least one ketone solvent selected from the group consisting of methyl isobutyl ketone, methyl ethyl ketone, dimethyl ketone, and mixtures thereof; Ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, diglyme, Triglyme, dipropylene glycol dimethyl ether, butyl carbitol, butyl triethylene glycol, methyl dipropylene glycol, methyl cellosolve acetate, propylene glycol monomethyl ether acetate, dipropylene glycol butyl ether acetate, diethylene glycol monobutyl ether At least one glycol-based solvent selected from the group consisting of acetate and mixtures thereof may be used.

More preferably, the above-described effect may be further improved by using a mixture of the hydrocarbon-based solvent: ketone-based solvent: and the glycol-based solvent in a volume ratio of 2: 1: 1.

In addition, the photocurable resin composition further includes 1 to 15 parts by weight of polydimethylsiloxane and 5 to 30 parts by weight of an organosilane compound, based on 100 parts by weight of the photoreactive mixture, as well as the above effects, as well as shrinkage and warpage properties (elongation ) Can be improved, physical property changes due to material separation and mixing with the first primer layer and the second primer layer can be prevented, and adhesion can be improved.

At this time, the organosilane compound is R1-Si(OC ₂ H ₅ ) ₃ , R2-Si(OCH ₃ ) ₃ , R3-SiH(OCH ₃ ) ₂ , R4-SiH(OC ₂ H ₅ ) ₂ and mixtures thereof At least one organic silane compound selected from the group consisting of may be used. However, wherein R1 may be hydrogen, methyl group, ethyl group, allyl group, phenyl group, vinyl group, 3-aminopropyl group, 3-glycidyloxypropyl group or 3-mercaptooxypropyl group, and R2 is hydrogen, methyl group, It may be an ethyl group, an isobutyl group, a phenyl group, a 3-chloropropyl group, a 3-mercaptooxypropyl group, a 3-aminopropyl group, an N-aminoethyl-3-aminopropyl group or a 3-methacryloxy group, and R3 is It may be a γ-aminopropyl group or an N-aminoethyl-3-aminopropyl group, and R4 may be a 3-aminopropyl group or a methyl group.

These organosilane compounds are R1-Si(OC ₂ H ₅ ) ₃ , R2-Si(OCH ₃ ) ₃ , R3-SiH(OCH ₃ ) ₂ , R4-SiH(OC ₂ H ₅ ) ₂ 1: 3: 3 : By using the mixture at a weight ratio of 1, the above effect can be further improved.

More specifically, the R1-Si (OC ₂ H ₅ ) ₃ is allyltriethoxysilane, triethoxysilane, phenyltriethoxysilane, and vinyltriethoxysilane. , 3-aminopropyltriethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, 3-glycidyloxypropyltriethoxysilane, 3-mercaptopropyltriethoxysilane and at least one selected from the group consisting of a mixture thereof, and R2-Si(OCH ₃ ) ₃ is 3-chloropropyltriethoxysilane (3 -chloropropyltrimethoxysilane), 3-mercaptopropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, N-aminoethyl-3-aminopropyl-trimethoxysilane (N- aminoethyl-3-aminopropyltrimethoxysilane), trimethoxysilane, methyltrimethoxysilane, ethyltrimethoxysilane, 3-methacryloxytrimethoxysilane, isobutyl Trimethoxysilane (isobutyltrimethoxysilane), phenyltrimethoxysilane (phenyltrimethoxysilane), and at least one member selected from the group consisting of a mixture thereof, and the R3-SiH(OCH ₃ ) ₂ is γ-aminopropylmethyldimethoxysilane (γ-aminopropylmethyldimethoxysilane), N-aminoethyl-3-aminopropyl-di Methoxymethylsilane (N-aminoethyl-3-aminopropyl-dimethoxymethysilane) and one or more selected from the group consisting of mixtures thereof, and the R4-SiH (OC ₂ H ₅ ) ₂ is 3-aminopropyl diethoxysilane One or more selected from the group consisting of (3-aminopropyldiethoxysilane), methyldiethoxysilane, and mixtures thereof may be used.

In addition, the first primer layer has excellent adhesion to the release layer at room temperature, imparts shape stability to the pattern ink film for thermal transfer, and can be easily separated from the release layer by thermal transfer. I can.

More specifically, the first primer layer is based on 100 parts by weight of a vinyl polysiloxane resin, an acrylic compound and a polyurethane aqueous dispersion in a weight ratio of 3:0.5:0.5, zinc stearate, zinc stearyl phosphate, and their By using one or more selected from the group consisting of mixtures in the range of 20 to 50 parts by weight, the above effect can be further improved.

Another embodiment of the present invention provides a deco film for a smartphone housing manufactured by the method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer according to the embodiment of the present invention.

A method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer according to an embodiment of the present invention is a pattern using a pattern ink ribbon for thermal transfer including a pattern ink film for thermal transfer having a total thickness of 1 to 2 μm. Since the printed layer is thermally transferred, there is an effect that additional heat treatment and drying processes are not required. Accordingly, there is an effect of simplifying the process and reducing the process time.

In addition, since the pattern ink film for thermal transfer having a total thickness of 1 to 2 μm realizes sufficiently clear texture and pattern, there is an effect of transferring a very thin pattern printing layer to a substrate for a smartphone housing.

In addition, since both sides of the pattern printing layer are laminated with a first primer layer and a second primer layer, respectively, there is an effect of being able to be transferred to a substrate for a smartphone housing with very excellent adhesion.

Accordingly, a deco film for a smartphone housing manufactured by the method of manufacturing a deco film for a smartphone housing using the pattern ink for thermal transfer has an effect of greatly improving aesthetics and visibility.

The description of the above embodiments, etc., is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the technical field to which the present invention pertains can various modifications and variations without departing from the essential characteristics of the present invention. Do. Accordingly, the exemplary embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by such an exemplary embodiment. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (5)

Preparing a pattern ink ribbon for thermal transfer including a pattern ink film for thermal transfer having a total thickness of 1 to 2 μm by sequentially laminating a release layer, a first primer layer, a pattern printing layer, and a second primer layer;
Positioning the thermal transfer pattern ink ribbon on a substrate for a smartphone housing so that the second primer layer of the thermal transfer pattern ink film faces the substrate for the smartphone housing;
By performing a thermal transfer process using a thermal transfer head to which a voltage of 200 to 210 V is applied at a pulse rate per second (pps) of 90 to 105, the second primer layer, the pattern on the smartphone housing substrate Including the step of forming a printing layer and the first primer layer,
The smartphone housing substrate is a polyester-based substrate, and the second primer layer includes a vinyl polysiloxane resin, and is configured to improve interface characteristics between the smartphone housing substrate and the second primer layer,
The pattern printing layer is formed in a pattern in which a plurality of wave shapes are formed at predetermined intervals in a vertical direction, and the wave shape is formed as a pattern implemented as a hologram,
The substrate for the smartphone housing is a polyester-based substrate containing polyimide,
The second primer layer is characterized by mixing a vinyl polysiloxane resin formed by reacting an amine-modified colloidal silica with a vinyl monomer containing a carboxyl group, and an acrylic compound and a polyurethane aqueous dispersion in a weight ratio of 2:2:1. Method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer.
The method of claim 1,
The thermal transfer pattern ink film is formed by further forming a deposition layer between the pattern printing layer and the first primer layer in order to control transmittance or reflectance,
The deposition layer uses a pattern ink ribbon for thermal transfer, characterized in that at least one deposition component selected from the group consisting of indium, chromium, tin, silicon, titanium, and mixtures thereof is deposited to a thickness of 10 to 150 Å. Method of manufacturing a deco film for smartphone housing.
delete The method of claim 1,
Forming a photocurable resin layer by applying a photocurable resin composition to the pattern printing layer; In order to engrave the pattern, the pattern of the mold device roller is transferred to the photocurable resin layer by rotating a pattern-making mold device roller formed by engraving the pattern on the outer surface of the body in close contact with the photocurable resin layer. step; And curing the photocurable resin layer by irradiating UV light to the photocurable resin layer having the transferred pattern,
The photocurable resin composition contains 0.5 to 2 parts by weight of a photoinitiator and 50 to 80 parts by weight of an organic solvent based on 100 parts by weight of a photoreactive mixture obtained by mixing a photoreactive monomer and a photoreactive oligomer in a ratio of 1: 1 to 1.5 ,
The photocurable resin layer is a method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer, characterized in that having a thickness of 0.5 to 2 μm.
A deco film for a smartphone housing, characterized in that it is manufactured by a method of manufacturing a deco film for a smartphone housing using a pattern ink ribbon for thermal transfer according to any one of claims 1, 2 or 4.

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