KR20170031593A - Adsorption-proof coated reflective polyester film and preparation method thereof - Google Patents

Abstract

The present invention relates to a white coated polyester film and, more particularly, to an adsorption-proof coated reflective polyester film that is suitable as a reflective member for a surface light source and a method for preparing the same. The present invention provides the coated reflective polyester film that has an adsorption-proof function and a method for preparing the same in order to improve the adsorption-proof function of existing white reflective films. The polyester film includes a reflective base film that has one surface coated with a coating layer including a curing adhesive and coating particles. The coating particle is an ellipsoid. The coating particle has a longitudinal diameter of 2 to 60 m. The coating particles have an average aspect ratio of 1.05 to 2.5:1. The coating particles account for 3 to 30% of the weight of the coating layer. The curing adhesive accounts for 70 to 97% of the weight of the coating layer. The coating particles are attached to the surface of the reflective base film by the curing adhesive. The reflective polyester film is provided with excellent adsorption-proof and scratch-proof functions and has a high reflectivity and a high deflection. Processes related to the method for preparing the same are simple and can be easily operated.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a polyester film,

The present invention relates to a coated white polyester film, and more particularly, to an anti-adhesion coating type anti-reflective polyester film suitable as a reflective member for a surface light source, and a method for producing the same.

The panel display technology is mainly composed of a liquid crystal display (LCD), a plasma display panel (PDP), a digital light processing (DLP), a silicon liquid crystal display (LCOS), an organic light emitting diode (OLED) (Liquid Crystal Displays) are thinner, lighter in weight, have lower power consumption, operate at lower pressures, and have a number of advantages including non-radiating It will be the mainstream technology of panel display for a long period of time. Light emitting diode (LED) backlight modules are classified into two types, side type and direct type. The optical film used here is mainly a reflection film, a brightness enhancement film, and a diffusion film.

In the side-type backlight application, since the reflective film is in close contact with the light guide plate, there is a possibility of adsorbing the light guide plate, so that the surface coating is performed on the reflection plate to improve the adsorption prevention function, .

In order to improve the adsorption preventing function of the conventional white reflective film, the present invention provides a polyester film for anti-adhesion coating type and a method for producing the same. The reflective film provided by the present invention has excellent adsorption preventing function, high reflectivity and deflection.

In order to solve the above technical problems, the present invention uses the following technical solution.

The present invention relates to a reflective base film comprising a reflective base film coated with a coating layer comprising a coating particle and a curing adhesive on one surface, wherein the coating particle is an ellipsoid, the long diameter of the coating particle is 2 to 60 占 퐉, Is 1.05 to 2.5: 1, the coated particles occupy 3 to 30% of the weight of the coated layer, the cured adhesive accounts for 70 to 97% of the weight of the coated layer, and the coated particles are coated on the surface of the reflective base film And an anti-adherence coating type anti-reflective polyester film adhered thereto.

In addition, the above-mentioned coated particles occupy 3 to 30% of the weight of the coating layer means the content of the coated particles in the coating layer dry film.

In the anti-adsorption coating type anti-reflective polyester film, the coated particles may be at least one selected from the group consisting of polymethylmethacrylate (PMMA), polybutylmethacrylate (PBMA), polyethylene terephthalate (PET), polybutylene terephthalate ), Polyethylene naphthalate (PEN), polypropylene (PP), polyethylene (PE), and polyamide (PA).

It is preferable that the coated particles are one or a combination of PMMA, PBMA, PET, and PBT.

In addition, among the anti-adsorption coating type anti-reflective polyester film, the curing adhesive is an acrylic resin adhesive or a polyurethane resin adhesive.

The viscosity of the cured adhesive raw material is 100 to 500 mPa · S.

In the anti-adsorption coating type anti-reflective polyester film, the long diameter of the coated particles is 5 to 40 탆, the average aspect ratio of the coated particles is 1.5 to 2.0: 1, and the coated particles have 10 to 20% , And the curing adhesive accounts for 80 to 90% of the weight of the applied layer.

In the anti-adsorption coating type anti-reflective polyester film, the reflective base film has a cell structure, the diameter of the cell is 0.1 to 3 μm, and the density of the cell is 10,000 to 100,000 / cm ³ .

The diameter of the cell is 0.5 to 2 탆, and the density of the cell is 40,000 to 80,000 cells / cm ³ .

In addition, in the anti-adsorption coating type anti-reflective polyester film, the reflective base film is an ABA three-layer structure in which the A-layer raw material contains 82 to 98.5% of polyester chips, 1 to 15% of inorganic fillers Titanium dioxide powder, anatase titanium dioxide powder and / or lithopone), 0.5 to 3% anti-blocking particles (e.g., silicon dioxide). The raw materials for the layer B include polyester chips (PET) of 58 to 68.5%, inorganic fillers of 15 to 20% (e.g., rutile titanium dioxide powder, anatase type titanium dioxide powder and / or ritofone), 10 to 15% Poly-3-methyl-1-butene and / or polystyrene), 5% toughening agent (for example, (Graft ratio ≥ 0.5%), glycidyl ester graft polypropylene / ethylene-octene copolymer (POE) (graft ratio ≥ 0.5%), maleic anhydride (MAH) graft, styrene ethylene butylene styrene , A maleic anhydride grafted POE (graft ratio ≥ 0.5%) and / or a glycidyl ester graft SEBS (graft ratio ≥ 0.5%)), 1.5 to 2% of a chain extender (for example, carbodiimide and / Or phthalic acid); Said percentage being weight percent; Here, each of the A layers accounts for 4 to 10% of the total thickness of the reflective base film, and the B layer accounts for 80 to 92% of the total thickness. The ABA triple layer structure is a three layer coextruded structure.

The intrinsic viscosity of the polyester is 0.68 to 0.74 dL / g. The intrinsic viscosity of the polyester PET chip is 0.68 to 0.74 dL / g.

The reflective base film may be an ABA three-layer coextruded structure. The reflective base film may have a thickness of 50 to 400 탆. The thickness of each of the A reflective layers may be the entire reflective base film The thickness of the B layer accounts for 80% to 92% of the total thickness of the reflective base film; The B layer of the reflective base film forms an elliptical cell structure in the course of pulling in both directions, the diameter of the cell is 0.1 to 3 탆, and the density of the cell is 10,000 to 100,000 / cm ³ .

In addition, the A layer of the reflective base film does not have a cell structure.

The thickness of the reflective base film is 100 to 300 탆.

In the anti-adsorption coating type anti-reflective polyester film, the mixing ratio of the reflective base film A layer is 86 to 89% polyester chips, 10 to 12% of inorganic filler, and 1 to 2% of anti-blocking particles; The blend ratio of the B layer is 60 to 66.5% of polyester chips, 15 to 18% of inorganic filler, 12 to 15% of polyolefin polymer, 5% of toughening agent and 1.5 to 2% of chain extender; The thickness of the reflective base film is 100 to 300 mu m.

In addition, in the anti-adsorption coating type anti-reflective polyester film, the thickness of the coating layer is 10 to 15 占 퐉. The thickness of the coating layer means the thickness of the cured adhesive in the coating layer.

The layer A of the reflective base film is composed of a polyester resin, inorganic particles and anti-blocking particles, the content of the polyester resin is 82 to 98%, the content of the inorganic particles is 1 to 15% The content is 1 to 3%; The raw material of the B layer of the reflective base film includes a polyester chip, a foaming function master batch, a toughened master batch, a chain extension master batch, and a white master batch; In the layer B, the addition amount of the polyester chips is 23 to 94.3%; Wherein the foaming function master batch is granulated with a polyolefin-based polymer and a polyester chip, the amount of the polyolefin-based polymer to be added is 5 to 20%; The addition amount of the toughened master batch is 0.5 to 5%; The chain extension master batch is prepared by granulating with a chain extender and a polyester chip, the addition amount of the chain extender is 0.1 to 2%; The white masterbatch is prepared by granulating with an inorganic filler and a polyester chip. The amount of the inorganic filler to be added is 0.1 to 50%, and the percentage is a weight percentage.

The polyester chip is one selected from polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN). The intrinsic viscosity of the polyester chips is 0.6 to 1.2 dL / g. Here, PET is preferable.

Further, the above-mentioned foam function master batch is produced by granulating with a polyolefin-based polymer and a polyester chip.

The polyolefin-based polymer may be at least one selected from the group consisting of polyethylene, polypropylene, polybutene, poly-3-methyl-1-butene, poly-4-methyl-1-pentene, polystyrene, polymethylstyrene, It is a combination. Here, poly-4-methyl-1-pentene is preferable. The polyester chip is one of PET, PBT and PEN.

In addition, the toughened masterbatch comprises a toughening agent and a polyester chip.

The toughening agent may be selected from the group consisting of acrylate graft POE (graft ratio ≥0.5%), glycidyl ester graft POE (graft ratio ≥0.5%), anhydrous maleic acid graft POE (graft ratio ≥0.5%), glycidyl ester graft SEBS (graft ratio ≥ 0.5%).

In addition, the chain extension master batch is prepared by granulating with a chain extender and a polyester chip. The polyester chip is one of PET, PBT and PEN.

In addition, the chain extender is one of phthalic acid, carbodiimide, and polycarbodiimide.

Further, the white masterbatch is prepared by granulating with an inorganic filler and a polyester chip.

The inorganic filler includes one of rutile type titanium dioxide powder, anatase type titanium dioxide powder, ritofone, barium sulfate, and zinc sulfide, and the particle size of the inorganic filler is 0.2 to 1 占 퐉. The rutile titanium dioxide powder is preferable, and the particle diameter is preferably 0.20 to 0.25 m. The polyester chip is one of PET, PBT and PEN.

In addition, the anti-blocking particles are first made of a polyester such as PET and an anti-blocking masterbatch, and are added and used in the form of a master batch. The anti-blocking particles such as silicon dioxide have a particle diameter of 0.5 to 2 占 퐉 and a content of 5,000 to 20,000 ppm.

According to the present invention,

(1) preparing a reflective base film;

(2) A coating liquid is prepared from the coated particles and a curing adhesive. The coating liquid is applied to the surface of the reflective base film obtained in the step (1) and the coating liquid is cured. The curing temperature is 50 to 90 ° C, 2 to 8 hours after the completion of the adsorption treatment.

In the coating liquid, the particle concentration of the coated particles is 3 to 6%. The thickness of the coating layer on which the coating liquid is applied to the surface of the reflective base film is 10 to 15 占 퐉. The particle concentration is a percentage of the weight of the coated particles in the total weight of the coating liquid.

According to the present invention,

(1) A polyester resin, inorganic particles and anti-blocking particles are uniformly mixed according to the blending ratio to obtain the A-layer raw material, and a polyester chip, a foaming function master batch, a toughened master batch, a chain extension master batch, Layer raw material and the B-layer raw material are melted and plasticized, and ABA three-layer co-extrusion and casting through a die head to form a cast sheet; (2) a step of subjecting the cast sheet obtained in the step (1) to longitudinal stretching, transverse stretching, thermoforming, winding and cutting to produce a reflective base film;

(3) The coating liquid is prepared from the coated particles and the cured adhesive, and the coating liquid is applied to the surface of the reflective base film obtained in the step (2), and the coating liquid is cured at a curing temperature of 50 to 90 ° C, 2 to 8 hours after the completion of the adsorption treatment.

Also, the extruder is a biaxial extruder, the temperature of each zone of the extruder is 260 to 300 ° C, the main engine rotation speed is 200 to 800 rpm, and the diameter of the filter screen is 20 to 100 μm.

The cast sheet has a cooling temperature of 17 to 25 캜, a longitudinal stretching temperature of 85 to 100 캜, a longitudinal stretching ratio of 2.5 to 3.2, a transverse stretching temperature of 100 to 125 캜, 3.4, the thermostatic temperature is from 250 to 280 DEG C, and the thermostatic time is from 0.5 to 2 min.

Compared with the existing technology, the coated type antifouling polyester film provided by the present invention has an excellent adsorption preventing function, and also has a scratch-preventing function, a high reflectance and a deflection, and the manufacturing process thereof is simple And is easy to operate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural schematic diagram of a anti-adsorption coating type anti-reflective polyester film provided by the present invention. FIG.

The technical solutions provided by the present invention will be further described in connection with the following drawings and embodiments.

1, the present invention comprises a reflective base film 1 coated with a coating layer 2 comprising a coating particle 21 and a curing adhesive 22 on one surface, The coated particles 21 have an average aspect ratio of 1.05 to 2.5: 1 and the coated particles 21 have an average aspect ratio of 3 to 3, which is the weight of the applied layer 2, The cured adhesive 22 occupies 70 to 97% of the weight of the coating layer 2 and the coated particles 21 are bonded to the surface of the reflective base film 1 through the cured adhesive 22, do. The reflective base film 1 has an ABA three-layer coextruded structure and the reflective base film 1 has a thickness of 50 to 400 탆. The A layer 11 and the A layer 12 have a thickness of 4 ~ 10%; The thickness of the B layer 10 accounts for 80 to 92% of the total thickness of the reflective base film; The reflective base film 1 forms an elliptic cell structure 101 in the course of pulling in both directions and the diameter of the cell 101 is 0.1 to 3 탆 and the density of the cell 101 is 10,000 to 100,000 cells / ³ < / RTI > adsorption-preventive coating type anti-reflective polyester film.

The main performance test method of the anti-adsorption coating type anti-reflective polyester film produced according to the method provided by the present invention is as follows.

Reflectance: The reflectance was measured through the integral d / 8 ° structural test under D65 light source conditions using a ColorQuest XE spectrophotometer (Hunterlab) according to GB / T3979-2008 standard, Is a weighted average value of the reflectance of the wavelength light wave at intervals of 10 nm from 400 to 700 nm, and the weight corresponds to the energy distribution curve of the D65 light source.

Adsorption prevention test: Cut off the reflective film, assemble it with 18.5-inch backlight (side type), and check whether the backlight has red spots after lighting. If there is a red spot, the adsorption of the surface reflecting film is relatively inferior. Good: excellent adsorption prevention function of reflective film; DELTA: normal adsorption prevention function of reflective film; X: A function of preventing a relatively poor adhesion of the reflective piece.

Diffraction test: Each film material for comparison is cut into a 5 cm x 30 cm long strip-shaped film, one end of the film is placed parallel to the edge of the table, pressed with a heavy object, the length of the film on the table is 10 cm, The length of the film portion deviating from the table is 20 cm, and the horizontal distance d from the bent end of the film to the edge of the table is defined as deflection, and the larger the deflection, the better the rigidity of the film.

Example 1

In the anti-adsorption coating type anti-reflective polyester film provided by the present invention, the reflective base film is an ABA three-layer structure. The compounding ratio of the reflective base film A layer is 82% of PET chip, intrinsic viscosity of 0.68 dL / g, 15% of rutile type titanium dioxide powder, and 3% of silicon dioxide. The mixing ratio of the B layer was 68.5% of PET chips, 0.68 dL / g of intrinsic viscosity, 15% of rutile titanium dioxide powder, 10% of poly-4-methyl-pentene, 5% of MAH graft SEBS %), And 1.5% of carbodiimide. Each A layer accounts for 5% of the total thickness, and the B layer accounts for 90% of the total thickness. The reflective base film has a cell structure, the diameter of the foam hole is 0.1 to 3 탆, and the density of the cell is 10,000 to 100,000 / cm ³ . The thickness of the reflective base film is 300 mu m. The coating liquid was applied to the surface of the reflective base film. The coated particles were ellipsoidal PMMA particles, the particle diameter was 7 μm, the aspect ratio was 1.05: 1, the curing adhesive was an acrylic resin adhesive, the particle concentration was 5% The coating layer thickness is 10 mu m. The related performance of the produced reflective film is shown in Table 1.

Example 2

In the production of anti-adsorption anti-reflective polyester film according to the above method, the reflective base film is an ABA three-layer structure. The mixing ratio of the reflective base film A layer is 89.5% PET chip, intrinsic viscosity is 0.68 dL / g, rutile type titanium dioxide powder is 10%, and silicon dioxide is 0.5%. The blend ratio of the B layer was 63% of PET chip, 0.68 dL / g of intrinsic viscosity, 15% of anatase type titanium dioxide powder, 15% of polypropylene, 5% of glycidyl ester graft POE (graft ratio ≥ 0.5% , 2% phthalic acid. Each A layer accounts for 6% of the total thickness. The reflective base film is provided with a cell structure, the diameter of the foam ball is 0.1 ~ 3μm, and the density of cells is 10,000 to 100,000 pieces / cm ^3, a thickness of 300μm on the reflective base film. Next, PBMA particles of ellipsoid were applied. The particle diameter was 7 占 퐉, the aspect ratio was 2.5: 1, the cured adhesive was an acrylic resin adhesive, the particle concentration was 3%, and the coating layer thickness was 10 占 퐉. The related performance of the produced reflective film is shown in Table 1.

Example 3

In the production of anti-adsorption anti-reflective polyester film according to the above method, the reflective base film is an ABA three-layer structure. The compounding ratio of the reflective base film A layer is 84.5% PET chip, intrinsic viscosity is 0.74 dL / g, 15% ritofone, 0.5% silicon dioxide. The blending ratio of the layer B was 63% for a PET chip, an intrinsic viscosity of 0.74 dL / g, 15% of ritofone, 15% of poly-3-methyl-1-butene and 5% of anhydrous maleic acid graft POE 0.5%) and 2% of polycarbodiimide. Each of the A layers occupies 6% of the total thickness, the reflective base film has a cell structure, the foam has a diameter of 0.1 to 3 탆, a cell density of 10,000 to 100,000 / cm ³ , The thickness of the base film is 300 mu m. The ellipsoidal PET particles were then applied. The particle diameter was 7 占 퐉, the aspect ratio was 1.5: 1, the cured adhesive was an acrylic resin adhesive, the particle concentration was 6%, and the coating layer thickness was 10 占 퐉. The related performance of the produced reflective film is shown in Table 1.

Example 4

In the production of anti-adsorption anti-reflective polyester film according to the above method, the reflective base film is an ABA three-layer structure. The mixing ratio of the reflective base film A layer is 88.5% PET chip, intrinsic viscosity is 0.68 dL / g, 10% ritofone, and 1.5% silicon dioxide. The blending ratio of the B layer was 58% for a PET chip, an intrinsic viscosity of 0.68 dL / g, 20% of ritofone, 15% of polystyrene, 5% of glycidyl ester graft SEBS (graft ratio ≥ 0.5% Is a polycarbodiimide. The A layer accounts for 7% of the total thickness, the reflective base film has a cell structure, the diameter of the foam hole is 0.1 to 3 탆, and the density of the cell is 10,000 to 100,000 / cm ³ . The thickness of the reflective base film is 300 mu m. Next, PBT particles of an ellipsoid were applied. The particle diameter was 10 占 퐉, the aspect ratio was 2.0: 1, the cured adhesive was an acrylic resin adhesive, the particle concentration was 5%, and the coating layer thickness was 15 占 퐉. The related performance of the produced reflective film is shown in Table 1.

Comparative Example 1

It is a product of TORAY of Japan and product model is E6D6300.

Table 1. Performance test results of the antireflection coating type antifouling polyester film prepared in Examples 1 to 4 and the reflective film provided in Comparative Example 1>

Example 5

The present invention provides an anti-adsorption coating type anti-reflective polyester film comprising a reflective base film coated with a coating layer comprising a coating particle and a curing adhesive on one surface, wherein the coating particle has an ellipsoidal The average particle size distribution of the coated particles is 2 to 5 μm, the average aspect ratio of the coated particles is 1.05 to 1.1: 1, the coated particles occupy 3% of the coating layer weight, the cured adhesive accounts for 97% The particles are bonded to the surface of the reflective base film through the cured adhesive. The coating layer thickness is 10 to 15 占 퐉.

The coated particles are polypropylene (PP), and the cured adhesive is an acrylic resin adhesive.

The reflective base film has a cell structure, the diameter of the foam hole is 0.1 to 0.3 탆, and the density of the cell is 10,000 to 20,000 / cm ³ .

The reflective base film is an ABA three-layer structure. The mixing ratio of the reflective base film A layer is 98.5% PET chip, intrinsic viscosity of 0.68 dL / g, 1% of rutile type titanium dioxide powder, and 0.5% of silicon dioxide. The mixing ratio of the B layer was 63.5% of PET chips, 0.68 dL / g of intrinsic viscosity, 18% of rutile titanium dioxide powder, 12% of poly-4-methyl-pentene, 5% of MAH graft SEBS %), And 1.5% of carbodiimide. Each A layer accounts for 4% of the total thickness, and the B layer accounts for 92% of the total thickness. The thickness of the reflective base film is 50 mu m.

The related performance of the produced reflective film is shown in Table 2.

Example 6

The present invention provides an anti-adsorption coating type anti-reflective polyester film comprising a reflective base film coated with a coating layer comprising a coating particle and a curing adhesive on one surface, wherein the coating particle has an elliptical Wherein the coated particles have a major axis of 50 to 60 μm and an average aspect ratio of the coated particles of 2.1 to 2.5: 1, the coated particles occupy 30% of the weight of the coated layer, the cured adhesive occupies 70% The coated particles are adhered to the surface of the reflective base film through the cured adhesive. The coating layer thickness is 10 to 15 占 퐉.

The coated particles are polyamide (PA), and the cured adhesive is a polyurethane resin adhesive.

The reflective base film is provided with a cell structure, the diameter of the foam ball is 2.5 ~ 3μm, the density of cells is 90,000 ~ 100,000 / cm ^3.

The reflective base film is an ABA three-layer structure. The mixing ratio of the reflective base film A layer is 98.5% PET chip, intrinsic viscosity of 0.68 dL / g, 1% of rutile type titanium dioxide powder, and 0.5% of silicon dioxide. The blend ratio of the B layer was 63.5% of PET chips, 0.68 dL / g of intrinsic viscosity, 15% of rutile titanium dioxide powder, 15% of poly-4-methyl-pentene, 5% of MAH graft SEBS %), And 1.5% of carbodiimide. Each A layer accounts for 10% of the total thickness, the B layer accounts for 80% of the total thickness, and the reflective base film has a thickness of 400 m.

The related performance of the produced reflective film is shown in Table 2.

Example 7

The present invention provides an anti-adsorption coating type anti-reflective polyester film comprising a reflective base film coated with a coating layer comprising a coating particle and a curing adhesive on one surface, wherein the coating particle has an ellipsoidal , The long diameter of the coated particles is 5 to 10 μm, the average aspect ratio of the coated particles is 1.5 to 2.0: 1, the coated particles occupy 10% of the weight of the coated layer, and the cured adhesive accounts for 90% , And the coated particles are bonded to the surface of the reflective base film through the cured adhesive. The coating layer thickness is 10 to 15 占 퐉.

The coated particles are PMMA, and the cured adhesive is an acrylic resin adhesive.

The reflective base film is provided with a cell structure, the diameter of the foam ball is 0.5 ~ 2μm, a cell density of 40,000 ~ 80,000 / cm ^3.

The reflective base film is an ABA three-layer structure. The mixing ratio of the reflective base film A layer is 86% of PET chip, 12% of rutile titanium dioxide powder, 2% of silicon dioxide; The blending ratio of the B layer was 60% of PET chip, 18% of rutile titanium dioxide powder, 15% of poly-4-methyl-pentene, 5% of MAH graft SEBS (graft ratio ≥ 0.5% Bodiedimide; The thickness of the reflective base film is 100 m, each A layer accounts for 10% of the total thickness, and the B layer accounts for 80% of the total thickness.

The related performance of the produced reflective film is shown in Table 2.

Example 8

The present invention provides an anti-adsorption coating type anti-reflective polyester film comprising a reflective base film coated with a coating layer comprising a coating particle and a curing adhesive on one surface, wherein the coating particle has an elliptical , The long diameter of the coated particles is 30 to 40 占 퐉, the average aspect ratio of the coated particles is 1.8 to 2.0: 1, the coated particles occupy 20% of the weight of the coated layer and the cured adhesive occupies 80% do. The coated particles are adhered to the surface of the reflective base film through the cured adhesive. The coating layer thickness is 10 to 15 占 퐉.

The coated particle is PBMA, and the cured adhesive is an acrylic resin adhesive.

The reflective base film is provided with a cell structure, the diameter of the foam ball is 0.5 ~ 2μm, a cell density of 40,000 ~ 80,000 / cm ^3.

The reflective base film is an ABA three-layer structure. The mixing ratio of the reflective base film A layer is 89% of PET chips, 10% of rutile titanium dioxide powder, 1% of silicon dioxide; The mixing ratio of the B layer was 66.5% of PET chip, 15% of rutile titanium dioxide powder, 12% of poly-4-methyl-pentene, 5% of MAH graft SEBS (graft ratio ≥ 0.5% Bodiedimide; The thickness of the reflective base film is 200 m, each A layer accounts for 4% of the total thickness, and the B layer accounts for 92% of the total thickness.

The related performance of the produced reflective film is shown in Table 2.

Example 9

The present invention provides an anti-adsorption coating type anti-reflective polyester film comprising a reflective base film coated with a coating layer comprising a coating particle and a curing adhesive on one surface, wherein the coating particle has an ellipsoidal Wherein the coated particles have a long diameter of 20 to 25 μm and an average aspect ratio of the coated particles of 1.5 to 2.0: 1, the coated particles occupy 15% of the weight of the coated layer, the cured adhesive occupies 85% The coated particles are adhered to the surface of the reflective base film through the cured adhesive. The coating layer thickness is 10 to 15 占 퐉.

The coated particles are PET, and the cured adhesive is a polyurethane resin adhesive.

The reflective film is a base having a cell structure, and further, the diameter of the foam ball is 0.5 ~ 2μm, the density of the cells is 40,000 ~ 80,000 / cm ^3.

The reflective base film is an ABA three-layer structure, the mixing ratio of the reflective base film A layer is 87.5% PET chip, 11% rutile titanium dioxide powder, 1.5% silicon dioxide; The blend ratio of the B layer was 63.2% of PET chip, 17% of rutile titanium dioxide powder, 13% of poly-4-methyl-pentene, 5% of MAH graft SEBS (graft ratio ≥ 0.5% Bodymide; The thickness of the reflective base film is 300 mu m, each A layer accounts for 7% of the total thickness, and the B layer accounts for 86% of the total thickness.

The related performance of the produced reflective film is shown in Table 2.

Table 2. Performance test results of anti-adsorption coating type anti-reflective polyester films prepared in Examples 5 to 9>

As can be seen from the numerical values in Tables 1 and 2, the coated type anti-reflective polyester film provided by the present invention has excellent adsorption preventing function and also has high reflectance and high deflection. Particularly, the coated type anti-reflective polyester films provided by Examples 7 to 9 have a superior anti-adherence function and have higher reflectance and deflection.

The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. All equivalent variations and modifications based on the teachings of the present invention are all included within the scope of the present invention.

Claims (10)

Wherein the coating layer comprising the coating particles and the curing adhesive comprises a reflective base film applied on one surface,
Wherein the coated particles are ellipsoidal, the coated particles have a major axis of 2 to 60 占 퐉, the average aspect ratio of the coated particles is 1.05 to 2.5: 1, the coated particles occupy 3 to 30% of the weight of the coated layer, And the coating particles occupy 70 to 97% of the weight, and the coated particles are adhered to the surface of the reflective base film through the cured adhesive. The method according to claim 1,
The coated particles may be at least one selected from the group consisting of polymethyl methacrylate (PMMA), polybutyl methacrylate (PBMA), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN) , Polyethylene (PE), polyamide (PA), or a combination of two or more thereof. The method according to claim 1,
Wherein the cured adhesive is an acrylic resin adhesive or a polyurethane resin adhesive. The method according to claim 1,
Wherein the coated particles have a long diameter of 5 to 40 占 퐉 and an average aspect ratio of the coated particles of 1.5 to 2.0: 1, the coated particles occupy 10 to 20% of the weight of the coated layer, and the cured adhesive has 80 to 90% By weight based on the total weight of the polyester film. The method according to claim 1,
The reflection-based film is the cell and the diameter of the cell is provided, and the (cell) structure is 0.1 ~ 3μm, form the hole density of 10,000 to 100,000 pieces / cm ³ in the features used coating type anti, anti-adsorption of the polyester film . The method according to claim 1,
Wherein the reflective base film is an ABA three-layer structure,
The A-layer raw material contains 82 to 98.5% of polyester chips, 1 to 15% of inorganic filler, 0.5 to 3% of anti-blocking particles;
The layer B raw material comprises 58 to 68.5% of a polyester chip, 15 to 20% of an inorganic filler, 10 to 15% of a polyolefin polymer, 5% of a toughening agent, and 1.5 to 2% of a chain extender;
Said percentage being weight percent;
Wherein each of the A layers accounts for 4 to 10% of the total thickness of the reflective base film, and the B layer accounts for 80 to 92% of the total thickness of the reflective base film. The method according to claim 1,
Wherein the reflective base film is an ABA three-layer coextruded structure, the reflective base film has a thickness of 50 to 400 탆,
The thickness of each of the A layers accounts for 4 to 10% of the total thickness of the reflective base film, the thickness of the B layer accounts for 80 to 92% of the total thickness of the reflective base film;
Wherein the B layer of the reflective base film forms an elliptic cell structure in the course of stretching in both directions, the cell diameter is 0.1 to 3 탆, and the cell density is 10,000 to 100,000 / cm ³ . Coated polyester film. The method according to claim 6,
The blending ratio of the reflective base film A layer is 86 to 89% polyester chips, 10 to 12% of inorganic filler, and 1 to 2% of anti-blocking particles;
The blend ratio of the B layer is 60 to 66.5% of polyester chips, 15 to 18% of inorganic filler, 12 to 15% of polyolefin polymer, 5% of toughening agent and 1.5 to 2% of chain extender; Wherein the reflective base film has a thickness of 100 to 300 占 퐉. The method according to claim 1,
Wherein the coating layer has a thickness of 10 to 15 占 퐉. (1) preparing a reflective base film;
(2) a step of preparing a coating liquid with the coating particles and a curing adhesive, and applying the coating liquid to the surface of the reflective base film obtained in the step (1) and curing the coating liquid. Wherein the adsorbing-preventing coating film is formed on the surface of the polyester film.

Images