KR101615631B1 - Transfer printing film having excellent durability - Google Patents

Abstract

The present invention relates to a transfer film for printing having excellent durability, comprising a base film layer; A top coating layer comprising a polyurethane resin polymerized with polycarbonate diol (PCD), polyethylene glycol (PEG) and isocyanate; A printing layer comprising a polycarbonate resin; And a thermoplastic adhesive layer comprising a melamine resin and an adhesion promoting agent.

Description

[0001] TRANSFER PRINTING FILM HAVING EXCELLENT DURABILITY [0002]

The present invention relates to a transfer film for printing having excellent durability, and more particularly to a transfer film for printing optimized for an adherend of a flexible material in which the shape of the adherend surface is inevitably deformed by use and storage such as paper or clothes .

BACKGROUND ART [0002] Transfer methods are widely used for printing various shapes, logos and designs on clothes, cloths and fabrics, which are usually made of natural fibers or man-made fibers.

The transfer method is typically thermal transfer. The thermal transfer is carried out by bringing a transfer sheet printed with various shapes, logos, and designs into close contact with an object to be transferred, applying a high temperature and pressure to the transfer sheet, Quot; to < / RTI >

The heat transfer is performed by pressing a recording medium with a platen and pressing the ink film coated with the heat-fusible ink having a low melting point on one surface of the thin base film, and heating the ink film with the dermal head on the back surface to transfer the ink onto the adherend.

Conventionally, a transfer film used in heat transfer is formed by forming a printed layer of a specific pattern or letter type on a base film by screen printing or offset printing, applying an overlying agent on the top, drying and completing the transfer film, After being pressed onto the fabric at a temperature of 150 캜 or higher, the base film was peeled off and a specific pattern of printed layer was formed on the fabric.

However, since the shape of an adherend such as clothes and paper is inevitably deformed by use, and the physical force is constantly applied from the outside, the print layer (coating layer) formed on the flexible adherend is desorbed over time, The pattern and the color are easily discolored.

Further, clothes and paper are generally vulnerable to heat, and are deformed or carbonized at a high temperature, so that adherends are damaged when a print layer is formed through a conventional heat transfer method.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a printing layer with flexibility and durability and further to provide a durability by forming a coating layer on the printing layer. And a printing transfer film optimized for adherends susceptible to damage such as paper.

According to an aspect of the present invention, A top coating layer comprising a polyurethane resin polymerized with polycarbonate diol (PCD), polyethylene glycol (PEG) and isocyanate; A printing layer comprising a polycarbonate resin; And a thermoplastic adhesive layer comprising a thermoplastic resin, a melamine resin and an adhesion promoter.

According to one embodiment, the base film layer may be formed of a material selected from the group consisting of triacetylcellulose (TAC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), poly Polybutylene terephthalate (PBN), polyacrylonitrile (PAN), polymethylmethacrylate (PMMA), polyvinyl alcohol (PVA), polyamide (PA) Polyimide (PI), polycarbonate (PC), polyether sulfone (PES), polyamide (PA), polyvinylalcohol (PVA), nylon, : PE) and polypropylene (PP).

According to one embodiment, the isocyanate may be a mixture of isophorone diisocyanate (IPDI) and 4,4'-methylene dicyclohexyl diisocyanate (H12MDI).

According to one embodiment, the top coating layer may further include 15 to 35 parts by weight of an acrylic resin and 40 to 55 parts by weight of toluene with respect to 100 parts by weight of the polyurethane resin.

According to one embodiment, the thickness of the top coating layer may be between 14 μm and 18 μm.

According to one embodiment, the printing layer may further include 200 to 800 parts by weight of a petroleum resin and 100 to 600 parts by weight of ethylene vinyl acetate per 100 parts by weight of the polycarbonate resin.

According to one embodiment, the thermoplastic adhesive layer may comprise 30 to 50 parts by weight of a thermoplastic resin, 2 to 10 parts by weight of a melamine resin, and 5 to 10 parts by weight of an adhesion promoter.

According to one embodiment, the adhesion promoter is selected from the group consisting of coumarone-indene resin, terpene-phenol resin, polybutene, C5 petroleum resin, , And a rosin ester.

According to one embodiment, the melting point of the thermoplastic adhesive layer may be 80 to 100 ° C.

Since the printing transfer film according to one aspect of the present invention is excellent in durability and flexibility of the printing layer, it is not easily damaged or detached by external physical force, and a coating layer is additionally formed on the printing layer. And the color can be kept sharp.

In addition, since the thermoplastic adhesive layer contains a melamine resin as a curing agent in addition to an adhesion promoter, it can strongly improve the durability of the printed layer because it is strongly adhered to the upper print layer and the adherend at the lower portion. Especially suitable for vulnerable garments and paper.

It should be understood, however, that the effects of the present invention are not limited to the above-described effects, but include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 is a cross-sectional view of a transfer film for printing according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a printing transfer film 100 according to an embodiment of the present invention.

As shown in Fig. 1, the printing transfer film 100 comprises a base film layer 10; A top coating layer 20 comprising a polyurethane resin polymerized with polycarbonate diol (PCD), polyethylene glycol (PEG) and isocyanate; A printing layer (30) comprising a polycarbonate resin; And a thermoplastic adhesive layer 40 comprising a thermoplastic resin, a melamine resin and an adhesion promoter.

The base film layer 10 is a thin film made of synthetic resin and is in contact with the top of the print layer 30 (or the top coat layer) to be laminated, and the print layer 30 can be peeled off after being transferred to the adherend .

Since the base film layer 10 is laminated on the print layer 30 (or the top coat layer), it prevents the print layer 30 from being damaged by external physical force, supports the transfer film, It is possible to minimize the scratching or damage of the product due to the distribution of the product.

The base film layer 10 may be typically formed of a film-like synthetic resin without limitation, and preferably includes triacetylcellulose (TAC), polyethylene terephthalate (PET), polybutylene terephthalate Polybutylene terephthalate (PBT), polyethylenenaphthalate (PEN), polybutylene naphthalate (PBN), polyacrylonitrile (PAN), polymethylmethacrylate (PMMA), polyvinyl alcolol : PVA), polyamide (PA), polyimide (PI), polycarbonate (PC), polyether sulfone (PES), polyamide (PA), polyvinyl alcohol Polyvinylalcohol (PVA), nylon, polyethylene (PE), and polypropylene (PP) It can be.

The thickness of the base film layer 10 may be less than 200 占 퐉, and specifically may be 20 占 퐉 to 125 占 퐉. If it is more than 200 μm, the flexibility of the transfer film may be poor and the merchantability of the product may be deteriorated. If it is less than 20 μm, the product may be easily broken at the time of distribution and storage.

The base film layer 10 may be removed after the transfer and may have a peeling force of 0.1 (gf / 25 mm width) to 100 (gf / 25 mm width) so that the base film layer 10 can be easily peeled off.

According to one embodiment, the base film layer 10 may further include a release layer (not shown) at the bottom. The release layer (not shown) allows the base film layer 10 to be easily peeled off from the print layer 30 when the base film layer 10 is removed after the transfer.

The releasing layer (not shown) may be a silicone releasing agent, a fluorine releasing agent or a fluorine silicone releasing agent, but is preferably a silicone releasing agent or a polydimethylsiloxane (for example, polydimethylsiloxane, PDMS).

According to one embodiment, the printing transfer film may include a top coating layer 20 including a polyurethane resin in which polycarbonate diol (PCD) and isocyanate are polymerized on the upper surface of the print layer 30.

The top coat layer 20 includes a polyurethane resin and is suitable for use in the surface treatment of the print layer 30 because it has durability, water resistance, moisture permeability, adhesive strength, abrasion strength and light transmittance.

The polyurethane generally refers to a polymer produced by the reaction of a compound having a hydroxyl group (-OH) with a compound having an isocyanate group (-NCO), but in the present invention, addition polymerization of an isocyanate and a polyol Means a polymer obtained by the reaction.

The polyurethane resin may be one obtained by polymerizing polycarbonate diol (PCD), polyethylene glycol (PEG) and isocyanate, and the isocyanate may be isophorone diisocyanate (IPDI), 4,4'-methylene di 4,4'-diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), 4,4'-methylene dicyclohexyl diisocyanate (H ₁₂ MDI), 4,4'-diphenylmethane diisocyanate , And hexamethylene diisocyanate (HDI). Preferably, the isocyanate is at least one selected from the group consisting of isophorone diisocyanate (IPDI) and 4,4'-methylenedicyclohexyl di Isocyanate (4,4'-Methylene dicyclohexyl diisocyanate: H ₁₂ MDI) may be mixed and used.

Wherein the polyurethane resin comprises 10 to 30 parts by weight of polyethylene glycol having a weight average molecular weight of 1,000 to 2,000 and 20 to 50 parts by weight of polycarbonate diol having a weight average molecular weight of 1,000 to 2,000 and 10 to 20 parts by weight of 1,4- The diol mixture and the isocyanate may be obtained by polymerizing a mixture of isophorone diisocyanate (IPDI) and 4,4'-methylene dicyclohexyl diisocyanate (H ₁₂ MDI) 2 to 5 parts by weight of isophorone diisocyanate (IPDI) and 4,4'-methylene dicyclohexyl diisocyanate (H ₁₂ MDI) are mixed at a ratio of 1 part by weight .

The mixing amount of the polycarbonate diol is preferably 10 to 30 parts by weight, and when the mixing amount of the polycarbonate diol is less than 10 parts by weight, there is a fear that the physical properties such as low melting point, water resistance and mechanical properties, which are weak points of polyethylene glycol, When the mixing amount of the polycarbonate diol is more than 30 parts by weight, the melting point, the water resistance, and the mechanical properties are increased but the moisture permeability may be lowered.

The isophorone diisocyanate (IPDI) exhibits high flexibility with excellent mechanical strength and excellent abrasion resistance, water resistance, and gloss and physical properties over time.

The 4,4'-methylene dicyclohexyl diisocyanate (H ₁₂ MDI) is a structure in which hydrogen is added to MDI to convert an aromatic ring into an alicyclic ring, which is relatively reactive and has excellent optical stability.

As the mixing ratio of isophorone diisocyanate (IPDI) increases, the isocyanate improves processability, abrasion resistance and solvent resistance. As the mixing ratio of 4,4'-methylene dicyclohexyl diisocyanate (H ₁₂ MDI) increases, Staining property and storage stability can be improved, so that it can be appropriately adjusted in consideration of the characteristics of the product.

The polycarbonate diol (PCD) is not only excellent in weather resistance, heat resistance and water resistance, but also has excellent physical properties by polymerizing with isophorone diisocyanate (IPDI) and 4,4'-methylenedicyclohexyldiisocyanate (H ₁₂ MDI) Can be realized, and the properties such as low melting point, water resistance and adhesive force of polyethylene glycol having excellent moisture permeability can be compensated.

According to one embodiment, the top coating layer may further include 15 to 35 parts by weight of an acrylic resin and 40 to 55 parts by weight of toluene with respect to 100 parts by weight of the polyurethane resin.

The polyurethane corresponds to a main portion of the top coat layer 20 and is applied to the top of the print layer 30 to give excellent durability such as solvent resistance and water resistance.

The acrylic resin is used as a diluent for the polyurethane, and removes the residue of the solvent.

The toluene serves as a catalyst for the polyurethane and the acrylic resin, and gives the best durability to the printing layer 30 within the above range, thereby minimizing discoloration and damage to the coating layer.

According to one embodiment, the thickness of the top coating layer 20 may be between 14 μm and 18 μm.

The top coat layer 20 serves to prevent damage or discoloration of the print layer 30. If the top coat layer 20 is excessively thin, the print layer 30 can not be provided with the appropriate durability required. If the top coat layer 20 is excessively thick, flexibility may be reduced and cracks may occur due to excessive deformation. It is preferable to adjust it to an appropriate range in consideration of the characteristics of the battery.

According to one embodiment, the printing transfer film may include a printing layer 30 including a polycarbonate resin on the top coating layer 20. [

The printing layer 30 may further include 200 to 800 parts by weight of a petroleum resin and 100 to 600 parts by weight of ethylene vinyl acetate per 100 parts by weight of the polycarbonate resin.

The printing layer 30 is formed of a specific pattern or pattern to be formed on the surface of a transfer target and is formed by a spin coating process, an ink jet printing process, a screen printing process, a gravure coating process, a microgravure process Micro Gravure coating, Kiss Gravure coating, Comma Knife coating, Roll coating, Spray coating, Meyer Bar coating and Slit Die coating. But is not limited to, coating the top surface of the base film or top coating layer 20 with one or more methods selected from the group consisting of

If the object to be transferred is inevitably deformed by use or storage such as fiber or paper, the print layer 30 preferably has a high color fastness and an excellent fastness.

The printed layer 30 includes a polycarbonate resin in order to realize durability and flexibility. The polycarbonate resin imparts excellent impact resistance, heat resistance, and processability to the print layer 30, It is possible to minimize separation and cracking of the print layer 30 despite the deformation of the adherend.

Further, since the printing layer 30 including the polycarbonate resin further increases the adhesive strength with the top coating layer 20 including the upper polycarbonate-based polyurethane resin, the bonding strength with the top coating layer 20 Excellent durability can be realized.

If the inclusion of the polycarbonate resin is insufficient, the excellent physical properties of the polycarbonate may not be exhibited. If the polycarbonate resin is excessive, the clear color development may be deteriorated and the flexibility of the print layer 30 at the high temperature may be excessively increased Since the layer 30 can be separated from the underlying adhesive layer, it is desirable to maintain an appropriate ratio.

The petroleum resin improves the permeability to the adherend of the design (print layer) printed on the transfer paper in the heat transfer process.

When the content of the petroleum resin is less than 200 parts by weight with respect to 100 parts by weight of the polycarbonate resin, the penetration ability and the adhesive force are lowered and the print layer 30 tends to desorb from the lower surface. When the content is more than 800 parts by weight, The surface of the adherend can be cured and a crack can be generated in the print layer 30. [

Ethylene Vinyl Acetate is a sticking material that fixes the viscosity of the print layer 30. When the content of ethylene vinyl acetate is less than 100 parts by weight based on 100 parts by weight of the polycarbonate resin, If the amount is more than 600 parts by weight, the viscosity of the print layer 30 after heat transfer increases, so that the print layer 30 transferred by the external force can be easily deformed.

The ink composition for forming the printing layer 30 may include a solvent, a defoaming agent, a dispersant, a dye, and the like conventionally used in the art, and the proportion or the material may be appropriately selected as needed.

According to one embodiment, the printing transfer film may comprise a thermoplastic adhesive layer 40 comprising 30 to 50 parts by weight of a thermoplastic resin, 2 to 10 parts by weight of a melamine resin, and 5 to 10 parts by weight of an adhesion promoter, The melting point of the adhesive layer 40 may be 80 to 100 캜.

The thermoplastic adhesive layer 40 is generally referred to as a hot-melt or hot-melt adhesive, and may be solid at room temperature and in a liquid state by heat. Since the thermoplastic adhesive can be solidified in a short time after being heated and melted at a high temperature, the continuous process is easy and the thickness of the adhesive layer can be easily controlled.

Typically, the thermoplastic adhesive layer 40 may include a base polymer, an adhesion-imparting resin, and a wax, and may further include an antioxidant, a plasticizer, a flame retardant, and the like.

The thermoplastic adhesive layer 40 may be formed of a material such as ethylene vinyl acetate (EVA), polyvinyl acetate (PVA), polyethylene (PE), amorphous polypropylene, thermoplastic elastomer Thermoplastic elastomers, polyamide, and polyester. Preferably, the thermoplastic resin may include polyethylene or polypropylene. However, the present invention is not limited thereto.

Specifically, the melt index of the polyethylene is preferably 2.1 to 4.5 g / 10 min, and the melting point of the polypropylene is preferably 4.3 to 9 g / 10 min.

The crystallinity of the polyethylene or polypropylene is preferably 5 to 20%. If the crystallinity is less than 5%, the adhesive ability of the adhesive layer is lowered, and the adhesive force can be easily detached from the adherend due to the physical force. If the crystallinity is more than 20%, the adhesive property may not be exhibited due to lack of crystallinity upon heat bonding.

According to one embodiment, the adhesion promoter is selected from the group consisting of coumarone-indene resin, terpene-phenol resin, polybutene, C5 petroleum resin, , And rosin esters, but are not limited thereto.

The adhesion promoter may be added to increase the adhesive strength of the adhesive layer, and may be used in the range of 5 to 10 parts by weight. If the amount of the adhesion promoting agent is less than 5 parts by weight, the initial adhesion may not be satisfied. If the amount is more than 10 parts by weight, the proportion of the low molecular weight component in the adhesive layer is increased and the cohesive strength is decreased and the hardness is excessively increased due to rapid solidification, .

In particular, the adhesion promoter may preferably be a rosin or a rosin derivative. The rosin is a natural resin obtained by distilling rosin, and is composed of abidetic acid as a main component and is made of resin such as neoabietic acid, lipomic acid, hydroabietic acid, pimaric acid, acid.

The rosin can reduce the cohesive force of the thermoplastic adhesive layer 40 and lower the melting point. Therefore, it is possible to adjust the melting point of the adhesive layer in consideration of the properties of the adherend which is vulnerable to high heat such as fibers and paper, have.

The thermoplastic adhesive layer 40 may contain 2 to 10 parts by weight of a melamine resin.

The melamine resin is a kind of thermosetting resin and has excellent water resistance, chemical resistance and solvent resistance, and serves to supplement the insufficient physical properties of the thermoplastic resin. In particular, the melamine resin is suitable as an auxiliary resin for improving the physical properties of an adhesive layer formed on an adherend having a small supporting force such as paper or fiber.

That is, since the thermoplastic adhesive layer 40 of the transferable film for printing according to the present invention contains melamine resin, it has excellent durability and flexibility, so that the adhesive force to the adherend can be maintained despite the frequent physical force applied from the outside.

However, if the content of the melamine resin is less than 2 parts by weight, the effect of improving the physical properties may not be sufficiently exhibited. If the content exceeds 10 parts by weight, the thermoplasticity of the adhesive layer may be lowered and the melamine resin may not melt even at a high temperature. It is good.

The melting point of the thermoplastic adhesive layer 40 made of an adherend of fibers or paper is preferably 80 to 100 ° C, but the content of the melamine resin and the rosin can be controlled in consideration of the characteristics of the adherend.

The thermoplastic adhesive layer 40 may further include an antioxidant, a plasticizer, a flame retardant, and the like, which are conventionally used in the art. If necessary, the thermoplastic adhesive layer 40 may be appropriately selected and mixed.

Hereinafter, the present invention will be described in further detail through examples.

Example

Polyurethane was prepared by polymerizing polycarbonate diol (PCD), polyethylene glycol (PEG) and isocyanate on the surface of a polyethylene terephthalate (PET) base film. The isocyanate was prepared by reacting isophorone diisocyanate (IPDI) and isophorone diisocyanate And 4,4'-methylene dicyclohexyl diisocyanate (H ₁₂ MDI) were used as the isocyanate.

100 parts by weight of the polymerized polyurethane resin, 20 parts by weight of acrylic resin, and 45 parts by weight of toluene were mixed to complete the top coating layer 20 composition.

The polyurethane coating composition was applied to the base film to form a top coating layer 20 having a thickness of 14 m. Then, 30 parts by weight of aromatic petroleum resin, 30 parts by weight of ethylene vinyl acetate, 10 parts by weight of a carbonate resin, and an ink composition containing a solvent, a defoaming agent, a dispersant and a dye as the remainder were applied to form a printing layer 30.

A thermoplastic adhesive composition comprising 40 parts by weight of ethylene vinyl acetate, 7 parts by weight of rosin, and 5 parts by weight of a melamine resin was melted and applied onto the print layer 30 and solidified by cooling.

The completed transfer film was heated and pressed on the surface of a t-shirt having a surface of 90 DEG C, and then heat-transferred, followed by cooling at room temperature, and the uppermost substrate film was removed.

Comparative Example  One

Thermal transfer was performed on the surface of the cotton T-shirt through the same method as in the above example, except that the top coat layer 20 was formed to a thickness of 8 탆.

Comparative Example  2

Except that a polyurethane resin in which polycarbonate diol and 4,4'-diphenylmethane diisocyanate (MDI) were polymerized in the formation of the top coating layer 20 was used Thermal transfer was performed on the surface of the cotton T-shirt.

Comparative Example  3

Thermal transfer was performed on the surface of the cotton T-shirt by the same method as that of the above example, except that the weight of the ink composition was changed to a petroleum resin instead of the polycarbonate resin.

Comparative Example  4

Thermal transfer was performed on the surface of the cotton T-shirt by the same method as that of the above example except that the thermoplastic adhesive layer 40 was replaced with ethylene vinyl acetate in place of rosin.

Comparative Example  5

Thermal transfer was performed on the surface of the cotton T-shirt by the same method as that of the above example, except that the weight of the thermoplastic adhesive layer 40 was changed to ethylene vinyl acetate instead of the melamine resin.

Comparative Example  6

A polyurethane resin obtained by polymerizing polycarbonate diol and 4,4'-diphenylmethane diisocyanate (MDI) in the formation of the top coating layer 20 was used. In the ink composition, polycarbonate Thermal transfer was performed on the surface of the cotton T-shirt by the same method as in the above example except that the weight was replaced by ethylene vinyl acetate instead of resin and rosin.

Experimental Example  : Durability and Sharpness Evaluation of Warrior Patterns

The rating items for the degree of luxurious aesthetics and print texture and sharpness were as follows. A panel of 10 panelists was asked for evaluation. When the panelists were judged to be good at 8 or more, the panel was judged to be good at 7 or more, And when it was judged to be less than 5, it was evaluated as X.

Scratchability was evaluated by scratching the transferred surface with five fingernails with a fingernail, evaluating whether or not the transferred print layer 30 had been peeled off, evaluating X if the transfer pattern was once peeled off, and 0 otherwise .

The adhesion was evaluated by peeling test 10 times after attaching the tape, evaluated as X when peeling 3 times or more, O when peeling was not done,

The evaluation of the washing fastness was evaluated by washing the clothes 10 times with a washing machine, and when the transferred print layer 30 was partially peeled off, it was evaluated as X, otherwise it was evaluated as O.

ingredient Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Aesthetic (luxury) ◎ ◎ ○ △ △ ○ △ Print Texture ◎ ◎ ○ △ △ ○ △ definition ◎ ◎ ○ △ ○ ○ △ Scratchiness ○ X X ○ ○ ○ X Attachment ○ △ △ ○ △ △ X Wash fastness ○ X X ○ X X X

As shown in the above table, in the case of Examples, the durability such as adhesion and washing fastness was evaluated to be excellent as well as the texture and clarity of the printed pattern, whereas Comparative Examples 1 to 6 were somewhat less physically Respectively.

In particular, in the formation of the top coat layer 20 and the print layer 30, it was confirmed that Comparative Example 6, except for the main components for improving durability and adhesive ability, had insufficient physical properties compared with the Examples.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: Printing transfer film
10: base film layer
20: Top coating layer
30: Printed layer
40: thermoplastic adhesive layer

Claims (9)

A base film layer;
A top coating layer comprising a polyurethane resin polymerized with polycarbonate diol (PCD), polyethylene glycol (PEG) and isocyanate, acrylic resin and toluene;
A printing layer comprising a polycarbonate resin; And
And a thermoplastic adhesive layer comprising a thermoplastic resin, a melamine resin and an adhesion promoter.
The method according to claim 1,
The base film layer may be formed of at least one of triacetylcellulose (TAC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate PBN), polyacrylonitrile (PAN), polymethylmethacrylate (PMMA), polyvinyl alcohol (PVA), polyamide (PA), polyimide (PI) Polyether sulfone (PES), polyamide (PA), polyvinylalcohol (PVA), nylon, polyethylene (PE) and polypropylene And polypropylene (PP).
The method according to claim 1,
Wherein the isocyanate is a mixture of isophorone diisocyanate (IPDI) and 4,4'-methylene dicyclohexyl diisocyanate (H ₁₂ MDI).
delete The method according to claim 1,
Wherein the top coating layer has a thickness of 14 占 퐉 to 18 占 퐉.
The method according to claim 1,
Wherein the print layer comprises:
With respect to 100 parts by weight of the polycarbonate resin,
200 to 800 parts by weight of a petroleum resin, and 100 to 600 parts by weight of ethylene vinyl acetate.
The method according to claim 1,
Wherein the thermoplastic adhesive layer comprises 30 to 50 parts by weight of a thermoplastic resin, 2 to 10 parts by weight of a melamine resin, and 5 to 10 parts by weight of an adhesion promoter.
8. The method of claim 7,
The adhesion promoter may be selected from the group consisting of coumarone-indene resin, terpene-phenol resin, polybutene, C5 petroleum resin, rosin, and rosin ester). < / RTI >
9. The method of claim 8,
Wherein the thermoplastic adhesive layer has a melting point of 80 to 100 캜.

Images