KR101556961B1 - A sheet containing hybrid coating layer - Google Patents

Abstract

The present invention relates to a sheet including a hybrid coating layer, which comprises: a sheet main body; and a coating layer coated with a hybrid coating liquid on the top and bottom part of the sheet main body. The hybrid coating liquid of the present invention contains: a polyurethane resin; an anti-blocking agent comprising inorganic particles; a wear-resistant enhancer; an anti-slip improving agent; a surface leveling agent; and a solvent. Accordingly, it is possible to improve anti-blocking properties, wear-resistancy, slipping properties, transparency, and printabilities by coating the coating layer on the top and bottom part of the sheet main body, and also possible to provide effects of increasing efficiency in a manufacturing process.

Description

A sheet containing hybrid coating layer < RTI ID = 0.0 >

The present invention relates to a sheet comprising a hybrid coating layer, and more particularly to a sheet comprising a hybrid coating layer having improved antiblocking, abrasion resistance, slipperiness, transparency and printability.

Polymers such as polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethylmetacrylate (PMMA), polystyrene (PS), polycarbonate (PC) Amorphous plastic sheet made of materials such as polyethylene terephthalate (PE), polypropylene (PP) and the like has excellent mechanical strength, thermal characteristics, chemical resistance, electrical characteristics, moisture resistance, water resistance and transparency. Packaging materials, advertisement prints, and the like.

The amorphous plastic sheets made of the above-described materials are exposed to heat and pressure in the process of winding them up or distributing them, or ultimately, the user's use or storage of them after circulation. At this time, blocking may occur between adjacent sheets, or the adhesion of the ink printed on the sheet may be weakened, causing the printed ink to stick to the adjacent sheet. It is important to improve the slip and anti-blocking properties between the sheets in order to prevent this phenomenon, since separating the blocked sheets from each other damages either the ink or the sheet. It is also important to improve the abrasion resistance and scratch resistance in order to prevent the sheet from being damaged during the separation process. In addition, depending on the content of the anti-blocking agent used to increase the anti-blocking property, the haze decreases and the hot melting property decreases depending on the content of the slip improving agent used to increase the slip property. Transparency control is also important at the same time.

The prior art for improving the properties of the sheet is described in Korean Patent Registration No. 10-0660936, Slip property, amorphous polyester sheet excellent in printability and molded article. The prior art is composed of a core layer made of an amorphous resin sheet, an amorphous polyester skin layer disposed on the upper surface of the core layer, and a coating layer uniformly formed on at least one surface of the skin layer. This prior art technique involves adding inorganic particles to the skin layer to increase anti-blocking properties, and laminating a coating layer having a slip functional additive and a hot-melt adhesive function on at least one side of the skin layer. Such conventional techniques produce a sheet by stacking a plurality of layers having different functions in order to manufacture sheets having improved functions. Accordingly, there is a problem that the manufacturing process is complicated, the manufacturing time is increased, and the manufacturing cost is increased accordingly.

Accordingly, an object of the present invention is to provide a sheet comprising a hybrid coating layer with improved antiblocking ability, abrasion resistance, slipperiness, haze and printability, and increased efficiency in the manufacturing process.

The above-described object is achieved by a seat assembly comprising: a seat body; Wherein the hybrid coating solution comprises a polyurethane resin, an antiblocking agent comprising an inorganic particle, an anti-wear property enhancer, a slip remover, a surface smoothing agent, and a solvent The present invention is also directed to a sheet comprising a hybrid coating layer.

0.01 to 4 parts by weight of a polyurethane resin, 0.01 to 3 parts by weight of an antiblocking agent containing inorganic particles, 0.01 to 4.5 parts by weight of a wear resistance enhancer, 0.01 to 1 part by weight of a slip remover, 0.1 to 1 part by weight of a surface smoothing agent, And the solvent is 70 to 97 parts by weight. Preferably, the hybrid coating solution contains 5 parts by weight of a polyurethane resin, 0.15 parts by weight of an antiblocking agent containing inorganic particles, 0.5 parts by weight of an anti-wear property enhancer, 0.15 parts by weight of a slip remover, 0.5 part by weight, and the solvent is 93.7 parts by weight.

It is preferable that the inorganic particles are at least one of silica, alumina, titania, zirconia and metal oxide. The wear resistance improver may be at least one selected from the group consisting of polyethylene, polypropylene ) Or a paraffin-based component such as pentane, hexane, heptane, octane, or the like.

The slip improver may be a non-silicone based vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, vinyl fluoride, methyl acrylate, Ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate, 2-hydroxyethyl acrylate, 2- Hydroxyethyl acrylate, 1,6-hexanediol diacrylate and dimethyltin methoxysilane, phenyltrimethoxysilane, methyltrimethoxysilane (methyl methoxysilane) Methyl trimethoxysilane, phenyl trimethoxysilnae, 3-glycidoxypropyl trimethoxysilane, methyl 3-glycidoxypropyldimethoxysilane (Meth yl 3-glycidoxylpropyl dimethoxysilane).

Preferably, the surface smoothing agent is at least one of acrylate, fluorine, fluorine, acrylate and silicone, and the thickness of the sheet is 0.1 to 0.5 mm. Preferably, the thickness of the coating layer is 0.5 To 5 mu m.

It is preferable that at least one of the plurality of coating layers further includes a printing layer.

According to the structure of the present invention described above, the coating layer is coated on the upper and lower portions of the sheet body to provide improved antiblocking, abrasion resistance, slipperiness, transparency and printing properties, and increased efficiency in the manufacturing process.

1 is a cross-sectional view of a sheet including a hybrid coating layer according to an embodiment of the present invention.

Hereinafter, the sheet 10 including the hybrid coating layer according to the present invention will be described in detail.

The sheet 10 including the hybrid coating layer 13 is composed of a sheet body 11 arranged in a central region and a coating layer 13 formed on the top and bottom of the sheet body 11. Here, the thickness of the sheet is 0.1 to 0.5 mm, and the thickness of the coating layer 13 is preferably 0.5 to 5 占 퐉, but the thickness may vary depending on the application. At least one of the plurality of coating layers 13 may further include a printing layer. It is preferable that the sheet body 11, the coating layer 13, and the print layer have transparency to the extent that the material on the opposite side can be identified. The sheet body 11, the coating layer 13, and the print layer may be formed as opaque sheets 10 as necessary.

The sheet body 11 is made of polyethylene terephthalate (PET), which is used in the production of general plastic sheets. In addition, the sheet body 11 is made of polyvinyl chloride (PVC), polymethylmetacrylate (PMMA), polystyrene (PS), polycarbonate (PC), polyester (PE), and polypropylene (PP).

The coating layer 13 formed on the top and bottom of the sheet body 11 is formed by preparing a hybrid coating solution and then coating it. The hybrid coating solution is prepared by adding an antiblocking agent, an abrasion resistance enhancer, a slip remover, and a surface smoothing agent, which are performance enhancers, to a solution in which a polyurethane resin and a solvent are mixed.

The hybrid coating solution comprises 3 to 30 parts by weight of a polyurethane resin, 70 to 97 parts by weight of a solvent, 0.01 to 3 parts by weight of an antiblocking agent, 0.01 to 4.5 parts by weight of an anti-wear property enhancer, 0.01 to 1 part by weight of a slip- 0.1 to 1 part by weight of a surface smoothing agent.

Here, the polyurethane resin serves as a binder so that the organic resin dispersion can be easily adsorbed to the sheet body 11, and in some cases, a polyurethane resin can be used as well as a polyurethane resin such as a polyurethane-acrylic resin, a polyurethane- - Organic resins having functional groups such as phenol, polyurethane-ethylene and polyurethane-propylene can be used.

The polyurethane resin and the polyurethane-related copolymer resin are obtained by reacting a polyol with a polyisocyanate in a solvent, and further, a chain extender and a neutralizing agent can be used.

The polyol is not particularly limited as long as it has two or more hydroxyl groups in the molecule, and any suitable polyol may be employed. Specifically, the polyol may be a polyester polyol, a polycarbonatediol, a polyether polyol, a caprolactam polyol, an acrylic polyol, an epoxy polyol, Amino polyol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,3-propanediol, 1,4-butanediol, pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-octanediol, 1-decanediol, 1,4-cyclohexanedimethanol, 1,4-cyclohexanediol, bisphenol A, bisphenol A, From the group consisting of F (bisphenol F), 1,2,5-hexatriol, pentaerythritol, glucose, sucrose and sorbitol At least one selected .

Here, a polyester polyol is typically obtained by reacting a polybasic acid component with a polyol component. Examples of the polybasic acid component include ortho-phthalic acid, isophthalic acid, terephthalic acid, 1,4-naphthalenedicarboxylic acid, 2, Naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, biphenyldicarboxylic acid, tetrahydrophthalic acid, acid, and the like. In addition to these, oxalic acid, succinic acid, malonic acid, glutaric acid, adipic acid, (Pimelic acid), Suberic acid, Azelaic acid, Sebacic acid, Iinoleic acid, Maleic acid, Fumaric acid, Mesaconic acid, (), Itaconic acid, and the like. In addition, alicyclic dicarboxylic acids such as hexahydrophthalic acid, tetrahydrophthalic acid, 1,3-cyclohexane dicarboxylic acid and 1,4-cyclohexane dicarboxylic acid, acid anhydrides thereof, alkyl esters, acid halides And the like. These may be used alone or in combination of two or more.

The polycarbonate diol is preferably an aliphatic polycarbonate diol. The polyurethane resin synthesized from such an aliphatic polycarbonate diol is excellent in mechanical properties, water resistance and oil resistance, and particularly excellent in long-term weatherability. On the other hand, the aliphatic polycarbonate diol includes, but is not limited to, at least one selected from the group consisting of polyhexamethylene carbonate glycol and polycyclohexanecarbonate glycol.

The polyether polyol is typically obtained by subjecting a polyhydric alcohol to ring-opening polymerization of an alkylene oxide. Examples of polyhydric alcohols include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, and trimethylolpropane. These may be used alone or in combination of two or more.

On the other hand, the polyisocyanate is not limited as long as it is a compound having two or more NCO- groups. (MDI), 1,5-naphthalene diisocyanate (NDI), tolidine diisocyanate (TODI), hexamethylene diisocyanate (HMDI), iso-isoprene diisocyanate (IPDI), p-phenylene diisocyanate, 1,4-diisocyanate, and xylene diisocyanate (XDI) may be used alone or in combination of two or more.

In the production of the polyurethane resin, a neutralizing agent can be used. By using a neutralizing agent, the stability of the polyurethane resin in water is improved. Examples of the neutralizing agent include ammonia, N-methylmorpholine, triethylamine, dimethylethanolamine, methyldiethanolamine, triethanolamine, morpholine, tripropylamine, ethanolamine, triisopropanolamine and the like. These may be used alone or in combination of two or more.

Examples of the chain extender include ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, pentanediol, 1,6-hexanediol, And alicyclic diamines such as ethylenediamine, propylenediamine, hexamethylenediamine, 1,4-butanediamine and aminoethylethanolamine; alicyclic diamines such as isophoronediamine and 4,4'-dicyclohexylmethanediamine; , Aromatic diamines such as xylylenediamine and tolylene diamine, and the like.

A polyurethane resin is prepared from the above-mentioned materials, and the solvent used for the production of the polyurethane resin is preferably inert to the polyisocyanate and use an organic solvent to be used with water. Examples of the organic solvent include ester solvents such as ethyl acetate and ethyl cellosolve acetate, ketone solvents such as acetone, methyl ethyl ketone and methyl isobutyl ketone, and ether solvents such as dioxane tetrahydrofuran. These may be used alone or in combination of two or more.

The solvent contained in the hybrid coating liquid is such that the coating liquid is in a liquid phase so that the polyurethane resin and the performance improving agent are uniformly dispersed and the coating of the sheet body 11 is facilitated. Distilled water or alcohols are used as the solvent, and the alcohols are preferably methanol, ethanol, propanol, isopropanol or butanol.

The performance enhancer includes any one of an antiblocking agent, an abrasion resistance enhancer, a slip remover, and a surface smoothing agent, and the antiblocking agent, the abrasion resistance enhancer, the slip remover, and the surface smoothing agent are made of an aqueous or alcohol dispersible material.

The anti-blocking agent is a material added to facilitate separation between sheets 10 by minimizing the sticking phenomenon between sheets 10 when a plurality of sheets 10 are stacked. The antiblocking agent may be a metal oxide such as silica, alumina, titania, zirconia, or natural polymer particles, which are inorganic particles having a size of several tens of nanometers to several micrometers.

The anti-blocking agent may be included in an amount of 0.01 to 3 parts by weight based on the total weight of the coating liquid. When the antiblocking agent is less than 0.01 part by weight, the antiblocking property can not be exhibited. When the antiblocking agent is more than 3 parts by weight, slipperiness and transparency are adversely affected.

The antiblocking agent is very important for mixing and dispersing with resins to improve the antiblocking properties as well as the permeability. Therefore, in addition to the surface treatment of the fine powder used as an antiblocking agent, it is induced to exhibit better antiblocking property by ultrasonic dispersion, homogeneous mixer dispersion, ball mill dispersion and grinding process, and induction milling grinding and dispersion process.

The abrasion resistance enhancer in the performance enhancer is added to improve the abrasion resistance of the sheet 10 and the scratch resistance. The abrasion resistance enhancing agent is at least one of polyolefin series such as polyethylene and polypropylene or paraffin series components such as pentane, hexane, heptane and octane, and the total weight of the coating liquid By weight based on the total weight of the composition. When the abrasion resistance enhancer is less than 0.01 part by weight, it is difficult to expect improvement in abrasion resistance and scratch resistance. When the abrasion resistance enhancer is more than 4.5 parts by weight, the abrasion resistance enhancer is excessively contained.

The slip improver refers to a silicone-based or non-silicon-based additive added for the purpose of improving the slip property and the surface tension of the sheet 10 in which a plurality of sheets 10 are stacked by improving the slip property of the coating layer 13 and lowering the surface tension. Here, the slip improver may be included in an amount of 0.01 to 1 part by weight based on the total weight of the coating liquid. If the amount of the slip improver is less than 0.01 part by weight, the effect of the slip improver is insufficient. If the amount of the slip improver is more than 1 part by weight, the amount of the slip improver is greater than other materials.

Preferred slip removers are non-silicone based vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, vinyl fluoride, methyl acrylate, ethyl acrylate, Ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate, isooctyl acrylate, 2-hydroxyethyl acrylate, 1,6-hexanediol diacrylate and dimethylcethoxysilane such as a silane cone, diphenyl methoxysilane, methyl trimethoxysilane, , Phenyl trimethoxysilnae, 3-glycidoxypropyl trimethoxysilane, methyl 3-glycidoxypropyldimethoxysilane (Methyl 3-glycidoxylpropyl dimethoxysilane).

The surface smoothing agent refers to a silicone-based or non-silicon-based additive added for improving the wettability of the material of the hybrid coating liquid constituting the coating layer 13 to be coated on the sheet 10. The surface smoothing agent may be included in an amount of 0.1 to 1 part by weight based on the total weight of the coating liquid. When the amount of the surface smoothing agent is less than 0.1 part by weight, the effect of the surface smoothing agent is insignificant. When the amount of the surface smoothing agent is more than 1 part by weight, the amount of the surface smoothing agent is larger than other materials.

Preferred surface smoothing agents are acrylate, fluorine, fluorine, acrylate and silicone.

In the following examples, compounding ratios according to kinds and amounts of binder resin, solvent, antiblocking agent, wear resistance enhancer, slip remover, and surface smoothing agent were shown.

≪ Preparation of polyurethane resin &

The reaction and neutralization of a certain amount of polyol, 2,2-bis (hydroxymethyl) propionic acid (DMPA) and isophorone diisocyanate (IPDI) And then dispersed to prepare an NCO-prepolymer polyurethane dispersion (NCO-PUD). More specifically, a polyol and DMPA are placed in a solvent N-methylpyrrolidone (NMP) in a reactor equipped with a stirrer, a reflux condenser and a separating funnel, and the temperature of the oil bath is maintained at 80 ° C And the mixture is homogeneously mixed using an agitator for 1 hour. When the mixture becomes transparent, the temperature is lowered, IPDI is added, and the mixture is reacted at 80 DEG C for 3 hours to obtain an NCO-terminal prepolymer having a carboxyl group. Then, the temperature of the reactor was lowered to 50 ° C., the viscosity was lowered with methyl ethyl ketone (MEK), 1,4-butanediol (1,4-BD) was added thereto, To obtain a NCO-terminal blocked prepolymer. Triethylamine (TEA) is added to the blocked prepolymer to obtain a divinylated polyurethane prepolymer, which is then dispersed in ion-exchanged water. Thereafter, the solvent is used to adjust the ratio of the polyurethane resin to the solvent.

≪ Example 1 >

5 parts by weight of a polyurethane resin as a binder resin, 93.78 parts by weight of a mixed liquid of distilled water, propanol and ethanol as a solvent, 0.07 part by weight of an antiblocking agent consisting of silica particles on an average of 50 nm, 0.5 part by weight of an anti- , 0.15 parts by weight of a slip remover as a silicone additive, and 0.5 parts by weight of a silicone surface-smoothing agent were prepared and compounded, and physical properties as shown in Table 1 were measured.

≪ Example 1-1 >

In Example 1, the blending ratio of the polyurethane resin, the solvent, the wear resistance enhancer, the slip remover, and the surface smoothing agent were the same, and the coating solution was prepared with 0.05 parts by weight of the antiblocking agent and the properties were measured as shown in Table 1.

≪ Example 1-2 >

In Example 1, the blending ratio of the polyurethane resin, the solvent, the wear resistance enhancer, the slip remover, and the surface smoothing agent were the same, and the content of the antiblocking agent was 0.03 part by weight, and the coating solution was prepared and compounded.

≪ Example 1-3 >

In Example 1, the formulation ratio of the polyurethane resin, the solvent, the antiblocking agent, the abrasion resistance enhancer and the surface smoothing agent was the same, and the slip remediation agent content was 0.05 weight part, and the coating solution was prepared and compounded.

≪ Example 1-4 >

In Example 1-1, the formulation ratio of the polyurethane resin, the solvent, the antiblocking agent, the abrasion resistance enhancer and the surface smoothing agent was the same, and the content of the slip improver was 0.05 part by weight. Respectively.

≪ Example 2 >

5 parts by weight of a polyurethane resin as a binder resin, 92.8 parts by weight of a mixed liquid of distilled water, propanol and ethanol as solvents, 0.5 part by weight of an antiblocking agent consisting of silica particles on an average of 500 nm, 1.0 part by weight of an anti- , 0.2 parts by weight of a slip remover as a silicone additive, and 0.5 parts by weight of a silicone surface-smoothing agent were prepared and compounded, and physical properties as shown in Table 1 were measured.

≪ Example 2-1 >

In Example 2, the blending ratios of the polyurethane resin, the solvent, the wear resistance enhancer, the slip remover, and the surface smoothing agent were the same, and the content of the antiblocking agent was 0.25 parts by weight, and the coating solution was prepared and compounded.

≪ Example 2-2 >

In Example 2, the formulation ratio of the polyurethane resin, the solvent, the wear resistance enhancer, the slip remover, and the surface smoothing agent was the same, and the content of the antiblocking agent was 0.1 part by weight, and the coating solution was prepared and compounded.

≪ Example 2-3 >

In Example 2, the formulation ratio of the polyurethane resin, the solvent, the antiblocking agent, the abrasion resistance enhancer and the surface smoothing agent was the same, and the slip improver content was 0.1 weight part, and the coating solution was prepared and compounded.

<Example 2-4>

In Example 2-1, the blending ratio of the polyurethane resin, the solvent, the antiblocking agent, the abrasion resistance enhancer and the surface smoothing agent was the same, and the content of the slip repellent agent was 0.1 part by weight, and the coating solution was prepared and compounded. Respectively.

&Lt; Example 3 >

5 parts by weight of a polyurethane resin as a binder resin, 93.65 parts by weight of a mixed liquid of distilled water, propanol and ethanol as solvents, 0.2 part by weight of an antiblocking agent consisting of silica particles on an average of 50 nm, 0.5 part by weight of an anti- 0.15 parts by weight of a slip remover as a silicone additive, and 0.5 parts by weight of a silicone surface-smoothing agent were prepared and compounded, and physical properties as shown in Table 1 were measured.

&Lt; Example 3-1 >

In Example 3, the blending ratio of the polyurethane resin, the solvent, the wear resistance enhancer, the slip remover, and the surface smoothing agent were the same, and the content of the antiblocking agent was 0.15 part by weight, and the coating solution was prepared and compounded.

&Lt; Example 3-2 >

In Example 3, the formulation ratio of the polyurethane resin, the solvent, the wear resistance enhancer, the slip remover and the surface smoothing agent was the same, and the content of the antiblocking agent was 0.1 part by weight, and the coating solution was prepared and compounded.

<Example 3-3>

In Example 3, the formulation ratio of the polyurethane resin, the solvent, the antiblocking agent, the abrasion resistance enhancer and the surface smoothing agent was the same, and the slip remediation agent content was 0.075 part by weight, and the coating solution was prepared and compounded.

<Example 3-4>

In Example 3-1, the formulation ratio of the polyurethane resin, the solvent, the antiblocking agent, the abrasion resistance enhancer and the surface smoothing agent was the same, and the content of the slip improver was 0.075 part by weight. Respectively.

A functional hybrid coating solution for sheet protection, antiblocking improvement, wear resistance improvement, slip improvement, transparency improvement and printing enhancement was prepared according to the formulation shown in the above examples. Each of the hybrid coating solutions prepared according to Examples was coated on a 0.3T sheet body using a gravure coater having a width of 1750 mm and the coated sheet was cut into a size of 1250 mm width and 750 mm width. The cut sheets were stacked at a height of 1000 mm and wound up. After one week, the packages were unpacked and the required properties were measured. Table 1 shows the required properties of the sheet to which the coating liquid differently formulated according to the above embodiment was applied.

Example Anti-blocking property Permeability Slipperiness prints
Adhesiveness Hot melt
Adhesiveness My scratch One ◎ X ○ ◎ ◎ ◎ 1-1 ◎ ○ ◎ ◎ ◎ ◎ 1-2 △ ○ ◎ ◎ ◎ ◎ 1-3 ◎ X △ ◎ ◎ ◎ 1-4 ◎ ○ △ ◎ ◎ ◎ 2 ◎ △ ○ ◎ ◎ ◎ 2-1 △ ○ ◎ ◎ ◎ ◎ 2-2 X ◎ ◎ ◎ ◎ ◎ 2-3 ◎ △ △ ◎ ◎ ◎ 2-4 △ ○ △ ◎ ◎ ◎ 3 ◎ X ○ ◎ ◎ ◎ 3-1 ◎ ○ ◎ ◎ ◎ ◎ 3-2 △ ◎ ◎ ◎ ◎ ◎ 3-3 ◎ X △ ◎ ◎ ◎ 3-4 ◎ ○ △ ◎ ◎ ◎

(?: Very excellent,?: Good,?: Fair, X: poor)

It was confirmed that the physical properties of the hybrid coating layer 13 prepared as shown in Table 1 were excellent. Particularly, anti-blocking property and permeability were found to vary depending on the kind and content of the particles. Also, it was confirmed that the content of the slip improver also affects the slip property of the coating layer 13, and it was confirmed that the slip property also affected the content of the anti-blocking agent. It can be expected that the more the antiblocking agent is contained in the coating layer 13, the lower the surface slip property. The permeability phenomenon can also be expected to be caused by the decrease in the permeability of the coating layer due to the increase of the content of the antiblocking agent. In addition, it was confirmed that the physical properties of the coating layer including the adhesive properties of the printed materials, the adhesion of the hot melt adhesive, the scratch resistance and the coating roll marks are very excellent overall properties.

10: Sheet
11: Seat body
13: Coating layer

Claims (10)

In a sheet comprising a hybrid coating layer,
A seat body;
And a coating layer coated on the upper and lower portions of the seat body with a hybrid coating liquid,
The hybrid coating solution may contain,
5 parts by weight of a polyurethane resin, 0.15 parts by weight of an antiblocking agent containing inorganic particles, 0.5 parts by weight of an abrasion resistance enhancer, 0.15 parts by weight of a slip remover, 0.5 parts by weight of a surface smoothing agent and 93.7 parts by weight of a solvent. Included sheets. delete delete The method according to claim 1,
The above-
Wherein the coating layer is at least one of silica, alumina, titania, zirconia, and a metal oxide. The method according to claim 1,
The abrasion-
And at least one of a polyolefin series such as polyethylene and polypropylene or a paraffin series component such as pentane, hexane, heptane and octane. &Lt; / RTI &gt; The method according to claim 1,
The slip-
It is also possible to use non-silicon based vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, vinyl fluoride, methyl acrylate, ethyl acrylate, Butyl acrylate, 2-ethyl hexyl acrylate, isooctyl acrylate, 2-hydroxyethyl acrylate, 1,6-hexyl acrylate, 1,6-hexanediol diacrylate and dimethylcethoxysilane such as a silane cone, diphenyl methoxysilane, methyl trimethoxysilane, phenyl trimethoxysilane, Phenyl trimethoxysilnae, 3-glycidoxypropyl trimethoxysilane, methyl 3-glycidoxylpropryl dimethoxysil (methyl 3-glycidoxypropyl trimethoxysilane) ane, and a hybrid coating layer. The method according to claim 1,
The surface smoothing agent,
Wherein the coating layer is at least one of acrylate, fluorine, fluorine denatured acrylate and silicone. The method according to claim 1,
Wherein the thickness of the sheet is 0.1 to 0.5 mm. 9. The method of claim 8,
Wherein the coating layer has a thickness of 0.5 to 5 占 퐉. The method according to any one of claims 1 and 4 to 9,
Wherein at least one of the plurality of coating layers further comprises a printing layer.

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