KR20120064499A - Transfer film for printing of high transcriptionefficiency having excellent flexibility - Google Patents

Abstract

PURPOSE: A transfer film is provided to form transcription coating layer with specific configuration component, to use an aluminum evaporation layer as a release layer, thereby improving releasing force at printing, properly transcribing on 3-dimensional objects. CONSTITUTION: A transfer film comprises a base film layer(110), a release layer(120), and a transfer coating layer(130). The release layer is on the based film layer. The transfer coating layer is on the release layer. The transfer coating layer comprises a carboxymethyl cellulose group, a cellulose ether base group, a plasticizer, and porous particles. The carboxymethyl cellulose group is one of sodium-carboxymethyl cellulose, kalium-caboxymethyl cellulose and calcium-carboxymethyl cellulose. The release layer is evaporated by aluminum.

Description

Transfer film for printing of high transcriptionefficiency having excellent flexibility}

The present invention relates to a transfer film for printing, and more particularly, a transfer for printing which thermally transfers images of various designs onto a desired adhered surface such as a plastic or processed wood surface by using a vacuum thermal transfer method. It is about a film.

Recently, various forms have been developed to easily insert a desired design into a mobile phone case or an outer surface of an electronic device.

There are technologies such as plating, painting, hydraulic transfer, silk screen printing, In Mold Labeling (IML), In Molding Decoration (IMD), etc., to introduce images onto the surface of the product. In the case of expressing various patterns by decorating the above surface, each has advantages and disadvantages, of which the silkscreen printing method is mainly used. However, in the case of the silk screen printing method, there is a disadvantage in that color reproduction is inferior due to limited printing colors. In addition, the IML and IMD method is a method of integrating the molded product and the printed film by fusion injection of the resin after placing the film with the image printed in the mold, which is a complicated process such as injection-only mold, trimming mold, film transfer device, etc. have.

On the other hand, in the vacuum thermal transfer method, an image is printed on a base film by using an inkjet printing method on a transfer film having a simple three-layer structure of a release layer and an ink receiving layer, and then the transfer film is stretched by applying heat and pressure. Since the 3D image transfer is possible by wrapping the curved surface, the process is simple and the water-soluble dye-receiving layer has an excellent ink absorption rate when printing, thereby increasing the transfer rate, and thus, has the advantage of excellent color implementation of a desired color. In addition, the inkjet printing method has the advantages of high output speed, low printer cost, and high resolution image output.

The base film and the release layer are peeled from the adhered surface after the transfer process and serve as a support layer of the ink receiving layer. When the thermal transfer method transfer film is printed using a inkjet printer, the printability of the printed matter and the transferability of transferring the printed ink to the adherend are performed in the ink receiving layer, so that the ink receiving layer is clear and has high color development. It can be said that it plays an important role in providing an image. However, the primer layer has a high adhesion force with the ink printed on the ink receiving layer through the inkjet printer as well as the ink receiving layer during the transfer process in which heat and pressure are applied, thereby holding the ink during the transfer process, thereby preventing the transfer of ink to the adhered surface. do. In addition, the dye receiving layer using a hydrophilic polymer such as polyvinyl alcohol, polyethylene glycol, etc. is a hydrogen bond with the sublimation transfer dye used as the ink of the hydroxyl group (-OH) of the polymer to transfer the ink to the adhered surface after the transfer process. There is a problem of lowering the transfer rate by lowering.

In addition, in the conventional transfer printing, when transferring using a transfer paper having a release agent layer, a printing ink layer, and an adhesive layer formed on a supporting layer such as paper or film, the release layer is separated or transferred to transfer to a deposit. In this case, the transparency is reduced to a space other than the printing ink layer, and even if the transparency is maintained, the water resistance is poor, so that the film becomes opaque when used for a long time, and the release film layer is visible during partial transfer even in the case of colored opaque adherends. Because of this, the quality of the product is significantly reduced. In the case of paper transfer, the material used as the release agent layer is a wax, which has a disadvantage in that the release agent layer is separated even by nails or a small force.

Therefore, it has an adhesive force that does not peel off after coating on the base film-release layer even without using a primer layer, and is easily separated from the release layer, and has excellent light resistance, scratch resistance, and water resistance of the transfer resultant, and three-dimensional curved surface. It is desired to develop a transfer film for printing with improved transfer efficiency when transferring to a transfer object.

In order to solve the above problems, an object of the present invention is to provide a transfer film that can improve the release force when printing on the transfer member as a transfer film and transfer to the three-dimensional transfer target well.

It is another object of the present invention to provide a transfer film having excellent light resistance, durability, scratch resistance, and water resistance, no bleeding phenomenon of the transfer coating layer, and a high transfer rate with high clarity and color development.

The present invention to achieve the above object is a base film layer; A release layer positioned on the base film layer; And a transfer coating layer positioned on the release layer, wherein the transfer coating layer includes a carboxymethyl cellulose group, a cellulose ether series, a plasticizer, and porous particles, and the carboxy-methyl cellulose group is sodium-carboxymethyl cellulose (Sodium- Carboxymethyl Cellulose), Potassium-Carboxymethyl Cellulose (Kalium-Carboxymethyl Cellulose) and Calcium-Carboxymethyl Cellulose (Calcium-Carboxymethyl Cellulose) characterized in that it provides a transfer film for printing with excellent high-fidelity efficiency.

In addition, the present invention in forming the transfer coating layer, the amount of the carboxy-methyl cellulose group, cellulose ether-based, plasticizer and porous nanoparticles is mixed 6 to 8 parts by weight of the carboxy-methyl cellulose group, based on 100 parts by weight of the solvent, It provides a high transfer efficiency printing printing film having excellent flexibility, characterized in that 2 to 4 parts by weight of cellulose ether series, 2 to 5 parts by weight of plasticizer, and 3 to 8 parts by weight of porous nanoparticles.

In the present invention, the cellulose ether series is methyl cellulose (Methyl Cellulose (MC)), hydroxy ethyl methyl cellulose (Hydroxy Ethyl Methyl Cellulose (HEMC)), hydroxy propyl methyl cellulose (Hydroxy PropylMethyl Cellulose (HPMC)), hydroxyethyl cellulose (Hydroxyethyl Cellulose (HEC)), hydroxypropyl (Hydroxypropyl Cellulose (HPC)) and ethyl hydroxyethyl cellulose (Ethyl Hydroxyethyl Cellulose (EHEC)) characterized in that at least one selected from high-transmission printing printing of high flexibility Provide a film.

In another aspect, the present invention, the plasticizer is characterized in that at least one selected from polyethylene glycol (Glycol), glycerin (Glycerin), propylene glycol (Propylene glycol), triacetin (Triacetin) and triethyl citrate (Triethyl citrate) It provides this high transfer efficiency printing film for printing.

In another aspect, the present invention provides a transfer film for printing with high high-fidelity efficiency, characterized in that the porous nanoparticles are silica sol or alumina sol.

In another aspect, the present invention provides a transfer film for printing with high high-fidelity efficiency, characterized in that the base film layer is selected from one or more of polyethylene terephthalate, polyester, polycarbonate, cellulose-acetate or polyethylene film.

In another aspect, the present invention provides a transfer film for printing with high high-efficiency efficiency, characterized in that the thickness of the base film layer is 50 to 200㎛.

In another aspect, the present invention provides a transfer film for printing with high high efficiency high flexibility characterized in that the release layer is deposited by aluminum.

In another aspect, the present invention provides a transfer film for printing with high high-fidelity efficiency, characterized in that the thickness of the release layer is 300 ~ 800Å.

In another aspect, the present invention provides a high transfer efficiency printing printing film having excellent flexibility, characterized in that the size of the porous nanoparticles 10 to 200 nm.

In addition, the present invention may further include an additive in the transfer coating layer, the additive is a water-resistant agent, antioxidant, fixing agent, fluorescent dye, talc, light diffusing agent, pH adjusting agent, antioxidant, antifoaming agent, leveling agent, lubricant, It provides a transfer film for printing having a high high-fidelity efficiency excellent in flexibility, characterized in that at least one selected from the group consisting of an anti-curling agent, a wet dispersion agent and a surfactant.

In addition, the present invention may further include a curing agent in the transfer coating layer, wherein the curing agent from the group consisting of oxalzoline, glyoxal, zirconium oxychloride, isocyanate, epoxide, aziridine, melamine-formaldehyde and dialdehyde It provides a transfer film for printing with high high-fidelity efficiency, characterized in that it is selected above.

In another aspect, the present invention provides a transfer film for printing with high high-fidelity efficiency, characterized in that the coating thickness of the transfer coating layer is 5 to 30㎛.

In another aspect, the present invention provides a transfer film for printing with high high-efficiency efficiency, characterized in that the transfer film is sublimated transfer at a temperature of 150 to 220 ℃ when transferred to the transfer target.

The transfer film for printing according to the present invention has an advantage that the transfer is made well even when transferring to a transfer object having a three-dimensional curved surface, so that separation does not occur in the transfer object.

In addition, the transfer target printed using the transfer film for printing according to the present invention has excellent effects of light resistance, durability, scratch resistance and water resistance.

In addition, the transfer target printed using the transfer film for printing according to the present invention has no bleeding phenomenon of the transfer coating layer and provides a transfer film having high clarity and color development with high transfer rate.

In addition, the transfer film for printing according to the present invention has a short working time when transferring to a transfer object, and can be immediately outputted as a color print without the need for a plurality of printing processes and can be transferred by a simple and simple process, and a transfer coating layer of the transfer film ( Since only the print layer) is sublimated and transferred, the color pigment penetrates into the transfer object, thereby leaving no trace.

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 in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts have the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

The terms " about ", " substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation to or in the numerical value of the manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

The present invention relates to a transfer film for printing on the transfer object base film layer; A release layer positioned on the base film layer; And a transfer coating layer positioned on the release layer, wherein the transfer coating layer includes carboxymethyl cellulose groups, cellulose ether series, and porous nanoparticles.

The base film layer and the release layer at the time of transfer are the parts which separate and fall off at the time of transfer to the transfer object, and the transfer coating layer contains ink and is the part to be transferred to the transfer body.

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

The present invention is composed of a base film layer 110, a release layer and a transfer coating layer. The base film layer 110 of the transfer film for printing according to an embodiment of the present invention is preferably a film excellent in thermal stability selected from one or more of polyester, polycarbonate, cellulose-acetate or polyethylene film. The base film layer 110 is easy to handle and has good deformability when the transfer film is printed on the transfer member so that the transfer is performed well upon transfer to the transfer object. The base film layer 110 preferably has a thickness of 20 μm to 300 μm, more preferably 50 to 200 μm.

In addition, the release layer 120 is vacuum-deposited with aluminum is formed on the base film layer 110. By using the aluminum deposition layer as the release layer 120, the transfer effect of the sublimation transfer ink of the transfer coating layer is enhanced by using aluminum having a high thermal conductivity at the same time as the release effect on the deposited surface after the transfer process. It also plays a role in improving the rate. The thickness of the release layer 120 is not particularly limited, but is preferably 300 kPa to 800 kPa, and effectively blocks the heat in the above range and has a great effect of the release force. More preferably, it is formed in about 400 GPa.

The transfer coating layer 130 of the transfer film for printing according to the present invention may serve to protect the printed portion from the external environment or light, heat or physical contact.

The solvent is not particularly limited in the composition for forming the transfer coating layer 130, but it is preferable to use water in consideration of environmental problems and workability, and other ketones and glycol ethers in consideration of dissolution of polymer and drying after coating. Alcohol solvents or methyl cellosolve, ethyl cellosolve, dimethyl formamide, dimethyl sulfoxide and the like can be used. Specific examples of ketones include acetone and methyl ethyl ketone, and specific examples of glycol ethers include diethylene glycol and diethylene glycol mono butyl ether, and specific examples of alcohol solvents include methanol, ethanol, butanol or isopropanol. do. Particularly preferred solvents for forming the ink receiving layer of the present invention are methanol, ethanol, isopropanol or methyl cellosolve, which can be used at 50% by weight or less of the total solvent.

The transfer coating layer 130 includes a carboxymethyl cellulose group, a cellulose ether series, a plasticizer, and porous nanoparticles.

Non-limiting examples of the carboxy-methyl cellulose group include any one of sodium carboxymethyl cellulose (Sodium-Carboxymethyl Cellulose), potassium- carboxymethyl cellulose (Kalium-Carboxymethyl Cellulose) and calcium- carboxymethyl cellulose (Calcium-Carboxymethyl Cellulose) It is preferably made, and particularly preferably sodium-carboxymethyl cellulose.

Sodium-Carboxymethyl Cellulose is a hydrophilic polymer, which substitutes a hydroxyl group (-OH) with a sodium carboxyl group (-CH ₂ COONa) and acts as an ink barrier to inhibit dye adhesion and expresses transcription. That is, the sodium-carboxymethyl cellulose is a water-soluble polymer, which acts as an ink barrier so as not to bond with the ink, thereby inducing the transfer path of the sublimation transfer ink to the adherend of the adherend during the transfer process, thereby improving the transfer rate of the ink. Play a role.

In addition, the cellulose ether-based serves to improve the strength and adhesion of the coating layer, it is possible to prevent the breakage in the coating layer during the adhesion process and the transfer of the high temperature and high pressure to the base film. In addition, it may serve to improve the durability of the coating layer.

The cellulose ether series is methyl cellulose (MC), hydroxy ethyl methyl cellulose (Hydroxy Ethyl Methyl Cellulose (HEMC)), hydroxy propyl methyl cellulose (Hydroxy PropylMethyl Cellulose (HPMC)), hydroxyethyl cellulose (Hydroxyethyl Cellulose) (HEC), hydroxypropyl (HPC) and ethyl hydroxyethyl cellulose (Ethyl Hydroxyethyl Cellulose (EHEC)) is preferably selected from at least one, using methyl cellulose (Methyl Cellulose (MC)) More preferred.

In addition, the plasticizer is preferably selected from one or more of polyethylene glycol (Glycol), glycerin (Glycerin), propylene glycol (Propylene glycol), triacetin (Triacetin) and triethyl citrate. It is more preferable to use polyethylene glycol.

The polyethylene glycol serves to provide flexibility in the transfer coating layer, thereby preventing cracks in the coating layer even during the three-dimensional transfer process with bending, thereby enabling three-dimensional molding. In addition, the polyethylene glycol (Polyethylene Glycol) is used as a hydrophilic plasticizer in consideration of the compatibility of the carboxy-methyl cellulose group of the hydrophilic polymer raw material and the cellulose ether series, by reducing the Tg by weakening the interaction between the plastic chain and the polymer chain Flexibility is given to the transfer coating layer to improve moldability when the transfer film is formed on the transfer target.

In addition, the porous nanoparticles are preferably silica sol or alumina sol, and using them may improve ink absorbency and color development. Pores of porous silica sol or alumina sol particles are opened during the high temperature transfer process, and the ink sublimes on the adherend of the adherend. Therefore, the ink bleeding phenomenon is prevented during printing to improve the ink absorbency.

The particle size of the silica sol or alumina sol is preferably 10 to 200 nm. In addition, in order to increase the ink absorption of the silica sol or alumina sol, it is preferable to use microporous particles. If the particle size of the silica sol or alumina sol is less than 10 nm, there is a problem that the ink absorbency is lowered, if it exceeds 200 nm, if the polymer resin is a transparent material, the problem of poor glossiness occurs.

In the formation of the transfer coating layer 130, the amount of the carboxy-methyl cellulose group, the cellulose ether series, the plasticizer and the porous nanoparticles is mixed in an amount of 6 to 8 parts by weight of the carboxy-methyl cellulose group, cellulose ether series 2 It is preferable that it is-4 weight part, the plasticizer 2-5 weight part, and 3-8 weight part of porous nanoparticles.

In the case of the plasticizer, when the plasticizer content is less than 2 parts by weight, there is no sufficient flexibility effect on the coating layer, causing cracks in the coating layer when forming a three-dimensional curved surface, and when the plasticizer content is more than 5 parts by weight, the coating layer enters the plasticizer. Will impair the mechanical strength and other physical properties of the.

In the case of the carboxy-methyl cellulose group and the cellulose ether series, the mixed amount is preferably added to about 10 parts by weight based on 100 parts by weight of the solvent. The carboxy-methyl cellulose group is for enhancing the transferability, and the cellulose ether series has a small amount of carboxy-methyl cellulose group and a small amount of cellulose ether as it plays a role of increasing the viscosity to show adhesion performance with the base film and increasing the strength of the coating layer. If the amount of the series is large, the strength of the coating layer and the adhesive strength with the substrate layer is increased, while there is a problem that can not be used as a transfer film is poor transferability.

On the other hand, if the amount of the carboxy-methyl cellulose group is high and the amount of the cellulose ether series is low, the adhesion performance is low, and after the coating layer is coated on the base film, the coating layer may be peeled off from the base film. The strength of the coating layer is weakened so that breakage occurs and the desired image cannot be obtained.

In addition, the transfer coating layer 130 of the present invention may further include various solid fine particles as a pigment. Specific examples of such inorganic fine particles include kaolin, talc, clay, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, calcium carbonate, magnesium carbonate, kaolin, talc, clay, talc, calcium sulfate, barium sulfate, titanium dioxide, Such as magnesium hydroxide, zinc oxide, zinc hydroxide, zinc sulfide, zinc carbonate, aluminum silicate, colloidal silica, alumina, colloidal alumina, aluminum hydroxide, zeolite, silicate, sodium silicate, diatomaceous earth, calcium silicate, magnesium silicate and synthetic silica, etc. White mineral pigments may be included. One or more of these may be used in the transfer coating layer 130 within a range that does not lower the characteristics of the transfer film of the present invention.

In addition, an additive may be further included in the transfer coating layer 130, wherein the additive is a water-resistant agent, an antioxidant, a fixing agent, a fluorescent dye, a talc, a light diffusing agent, a pH adjusting agent, an antioxidant, an antifoaming agent, a leveling agent, a lubricant, a curling agent. At least one may be selected from an inhibitor, a wet dispersant, a surfactant, and the like. By adding the additive to the transfer coating layer 130, the physical properties and functions of the transfer body may be complemented after the transfer. Among these, the fluorescent dye is preferably used in the range of 0.01 to 1.0% of the ink receiving layer because there is a phenomenon that the apparent whiteness is increased when the coating is coated.

In addition, the transfer coating layer 130 of the present invention may further include a curing agent to improve the water resistance. Such curing agents may be selected from the group consisting of oxalzoline, glyoxal, zirconium oxychloride, isocyanate, epoxide, aziridine, melamine-formaldehyde and dialdehyde.

The coating thickness of the transfer coating layer 130 is preferably 5 to 30㎛, more preferably 10 to 20㎛. When the coating thickness of the transfer coating layer 130 is 5 μm or less, a problem cannot be achieved at a satisfactory level of light resistance and water resistance, and when the coating thickness of the transfer coating layer 130 exceeds 30 μm, the sharpness and ink absorption of the printout are However, there is a problem of decreasing the transfer rate by increasing the sublimation rate of the ink. The transfer coating layer 130 is formed by a coating method, and non-limiting coating methods include air knife, knife roll, reverse, gravure and slot die method.

In the transfer of the transfer film for printing according to the present invention onto the transfer target, it is preferable to transfer the sublimation transfer at a temperature of 150 to 220 ° C. When transferred to the temperature, the ink printed after the transfer is excellent in the transfer is generated on the surface of the transfer object, there is a feature that does not feel heterogeneous when touching the surface transferred by hand. The transfer ink is vaporized without liquid process at high temperature so that the surface of the transfer object is swollen by heat to open pores and gaseous dye is introduced. If the temperature drops later, the pores close again and the gaseous dye returns to its solid state. The dye thus means to be part of the transferee. For this reason, sublimation transfer does not transfer to natural fibers such as 100% cotton, since natural fibers or uncoated materials do not have pores to open at high temperatures.

Sublimation transfer is made from materials that have been pretreated (such as urethane acrylates and polyesters with UV coating), such as polyester and coated metals, wood and plastics. The transfer target printed using the transfer film has excellent effects of light resistance, scratch resistance, durability and water resistance.

In addition, the transfer film for printing according to the present invention has a short working time when transferring to a transfer object, and can be immediately outputted as a color print without the need for a plurality of printing processes and can be transferred by a simple and simple process, and a transfer coating layer of the transfer film ( Since only the print layer) is sublimated and transferred, the color pigment penetrates into the transfer object, thereby leaving no trace.

Hereinafter, embodiments of the present invention will be described in detail.

Example  One

The base film layer was composed of a polyethylene terephthalate film having a thickness of 200 μm, and a release layer was formed by vacuum depositing aluminum on the base film layer. In addition, the transfer coating layer is mixed with sodium carboxymethyl cellulose (Sodium-Carboxymethyl Cellulose), methyl cellulose (Methyl Cellulose), polyethylene glycol and porous silica sol, the amount is mixed with respect to 100 parts by weight of sodium carboxymethyl cellulose Parts, 4 parts by weight of methyl cellulose, 3 parts by weight of polyethylene glycol and 3 parts by weight of silica sol were mixed.

 The particle size of the silica sol was 10 to 200 nm, and the ink was formed into a shape to be printed to complete a transfer film.

The transfer coating layer inputs a desired image into a computer, edits it into a desired image, and then prints a desired job file with a Piezo inkjet printer (model: STYLUS PRO 4880 manufactured by EPSON) with a sublimation transfer ink.

The transfer film thus prepared is transferred to a plastic transfer body. When the transfer film was transferred to the transfer member, a heat transfer method was applied at a rear portion of the transfer coating layer (print layer) in a thermal transfer method to release the release layer so that the transfer coating layer was transferred to the transfer member.

Example  2

The base film layer is composed of a polycarbonate film having a thickness of 100 μm, and vacuum-deposited with aluminum on the base film layer to form a release layer. In addition, the transfer coating layer is mixed with sodium carboxymethyl cellulose (Sodium-Carboxymethyl Cellulose), methyl cellulose (Methyl Cellulose), polyethylene glycol and porous silica sol, the amount is mixed with respect to 100 parts by weight of sodium carboxymethyl cellulose 8 weight Parts, 2 parts by weight of methyl cellulose, 4 parts by weight of polyethylene glycol and 5 parts by weight of porous silica sol were mixed. The particle size of the silica sol was 10 to 200 nm, and the ink is formed into a shape to be printed. In addition, a transfer film was completed by adding additives such as a light diffusing agent, a pH adjusting agent, an antioxidant, an antifoaming agent, a wet dispersion agent, and a surfactant to the transfer coating layer.

After inputting the desired image to the computer on the transfer coating layer, editing the desired image and printing the desired job file with a Piezo inkjet printer (model: STYLUS PRO 4880 manufactured by EPSON) with a sublimation transfer ink.

The transfer film thus prepared is transferred to a plastic transfer body. When the transfer film was transferred to the transfer member, a heat transfer method was applied at a rear portion of the transfer coating layer (print layer) in a thermal transfer method to release the release layer so that the transfer coating layer was transferred to the transfer member.

Comparative example  1 and 2

In the same manner as in Example 1 and Example 2, but the transfer film was prepared without the base film layer, and transferred to the transfer target.

Comparative example  3 and 4

In the same manner as in Example 1 and Example 2, but the transfer film is prepared without the formation of a release layer, the transfer coating layer is made of an acrylic resin to produce a transfer film, and transferred to the transfer target.

※ Experimental Example

The release force was evaluated to determine whether the transfer film was well printed on the transfer target, and the water resistance, light resistance, scratch resistance, and durability of the transfer film portion of the printed transfer target were evaluated.

※ Experiment result

1. In evaluating the degree of printing, Examples 1 and 2 are printed as intended on a transfer member having a three-dimensional curved surface, while Comparative Example 1 and Comparative Example 2 are printed on a plastic transfer member having a three-dimensional curved surface. It was not transferred as intended. This is characterized in that the deformability is improved so that the base film layer is well applied to the shape of the transfer object when the transfer film is transferred.

2. In evaluating the release force, Examples 1 and 2 are released as intended and adhere well to the transfer object. However, Comparative Example 3 and Comparative Example 4 has a problem that does not block the heat in the absence of the release layer, the substrate deformation and the release force of the transfer target is lowered and not transferred to the plastic transfer target as intended, the thermal transfer method As a result of printing, the ink of the transfer coating layer was spread and printed.

3. Light resistance and water resistance evaluation

After printing the transfer films prepared in Examples and Comparative Examples to evaluate the light resistance and water resistance of the printed place, the light density was measured with a D196 light density meter (GretagMacbeth, USA). When evaluating the light resistance, the exposure was performed at 60 ° C. for 10 hours using a Q-Sun / 3000 Xenon tester (Q-Lab Co., Ltd.), and the light density was measured again to compare the light density before and after exposure to evaluate light resistance. The body was immersed in water for 5 hours and then evaluated by measuring the amount of change in light density with respect to the color of the ink. The results are shown in Table 1.

division Light density change amount (%) Water resistance Example 1 4% ○ Example 2 4% ○ Comparative Example 1 10% △ Comparative Example 2 9% △ Comparative Example 3 12% × Comparative Example 4 10% △

○: excellent water resistance, △: normal water resistance, ×: poor water resistance

It can be seen that the transfer body prepared in the examples has excellent light resistance as a result of less light density reduction, and also excellent water resistance.

4. Scratchability (measurement of scratch resistance) and durability evaluation

Scratchability was measured by applying a 500g load using a pencil hardness tester (PHT, Korea Seokbo Science Co., Ltd.) in order to compare the surface hardness of each coated film of the subject after sublimation transfer. The pencil was scratched while maintaining a 45 degree angle while changing the Mitsubishi product from 6B to 9H to observe the change of the surface. The hardness of the pencil lead which scratches generate | occur | produced by five times per pencil hardness was measured.

Durability evaluation was measured vertical and horizontal durability using a universal testing machine (UTM, 5567), a physical property tester of the material.

division
Scratch resistance
durability Perpendicular level Example 1 3H 18 42 Example 2 3H 18 43 Comparative Example 1 HB 2 16 Comparative Example 2 HB 3 16 Comparative Example 3 HB 2 15 Comparative Example 4 HB 2 13

It can be seen that the transfer targets prepared in Examples 1 and 2 have excellent scratch resistance and durability even when the transfer targets of the same material are used.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

Claims (14)

Base film layer;
A release layer positioned on the base film layer; And
Consists of a transfer coating layer located on the release layer,
The transfer coating layer includes a carboxymethyl cellulose group, a cellulose ether series, a plasticizer and porous particles,
The carboxy-methyl cellulose group is any one of sodium-carboxymethyl cellulose (Sodium-Carboxymethyl Cellulose), potassium carboxymethyl cellulose (Kalium-Carboxymethyl Cellulose) and calcium- carboxymethyl cellulose (Calcium-Carboxymethyl Cellulose) This high transfer efficiency printing film for printing. The method of claim 1,
In the formation of the transfer coating layer, the amount of the carboxy-methyl cellulose group, the cellulose ether series, the plasticizer and the porous nanoparticles is mixed 6 to 8 parts by weight of the carboxy-methyl cellulose group, cellulose ether series 2 ~ 4 parts by weight, 2 to 5 parts by weight of plasticizer, and 3 to 8 parts by weight of porous nanoparticles, high transfer efficiency printing printing film having excellent flexibility. The method according to claim 1 or 2,
Cellulose ethers include methyl cellulose (MC), hydroxy ethyl methyl cellulose (HEMC), hydroxy propyl methyl cellulose (HPMC), hydroxyethyl cellulose (Hydroxyethyl cellulose) HEC)), Hydroxypropyl Cellulose (HPC) and ethyl hydroxyethyl cellulose (Ethyl Hydroxyethyl Cellulose (EHEC)) is a high transfer efficiency printing printing film with high flexibility, characterized in that it is selected. The method according to claim 1 or 2,
The plasticizer has a high flexibility, characterized in that at least one selected from polyethylene glycol (Glycol), glycerin (Glycerin), propylene glycol (Propylene glycol), triacetin (Triacetin) and triethyl citrate (Triethyl citrate) Efficient transfer film for printing. The method according to claim 1 or 2,
The porous nanoparticles are high transfer efficiency printing printing film having excellent flexibility, characterized in that the silica sol or alumina sol. The method according to claim 1 or 2,
The base film layer is a high-efficiency high efficiency printing printing film, characterized in that at least one selected from polyethylene terephthalate, polyester, polycarbonate, cellulose-acetate or polyethylene film. The method according to claim 1 or 2,
The thickness of the base film layer is 50 to 200㎛ high transfer efficiency printing printing film having excellent flexibility, characterized in that. The method according to claim 1 or 2,
The release layer is a high transfer efficiency printing printing film having excellent flexibility, characterized in that the deposition by aluminum. The method according to claim 1 or 2,
The transfer film for printing with high high-fidelity efficiency, characterized in that the thickness of the release layer is 300 ~ 800Å. The method according to claim 1 or 2,
The porous nanoparticles have a size of 10 to 200 nm, a high transfer efficiency printing printing film having excellent flexibility, characterized in that. The method according to claim 1 or 2,
An additive may be further included in the transfer coating layer, and the additive may include a water-repellent agent, an antioxidant, a fixing agent, a fluorescent dye, a talc, a light diffusing agent, a pH adjusting agent, an antioxidant, an antifoaming agent, a leveling agent, a lubricant, an anti curling agent, and a wetting agent. A high transfer efficiency printing film having high flexibility, characterized in that at least one selected from the group consisting of a dispersant and a surfactant. The method according to claim 1 or 2,
The transfer coating layer may further include a curing agent, wherein the curing agent is selected from the group consisting of oxalzoline, glyoxal, zirconium oxychloride, isocyanate, epoxide, aziridine, melamine-formaldehyde and dialdehyde High transfer efficiency printing film with high flexibility. The method according to claim 1 or 2,
Coating thickness of the transfer coating layer is a high-transmission efficiency printing printing film having excellent flexibility, characterized in that 5 to 30㎛. The method according to claim 1 or 2,
A high transfer efficiency printing printing film having high flexibility, characterized in that the transfer film is sublimated transfer at a temperature of 150 to 220 ℃ when transferred to the transfer target.

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