KR100906118B1 - An antistatic cover of tray for a display panel and the manufacturing method thereof - Google Patents

Abstract

An antistatic cover of a tray for protecting a display panel is provided to minimize dirt deposit or the pollution occurrence, to reduce scratch from the outside which can be generated in driving, and to maximize outer appearance and stability of the panel. An antistatic cover of a tray for protecting a display panel comprises a base sheet and an antistatic layer on one surface of the base sheet. The antistatic layer comprises an organic-inorganic hybrid photocurable coating composition 10-40 weight%, a conductive polymer 3-30 weight%, a photoinitiator or hardener 0.1-5 weight%, an organic solvent 40-80 weight% and an additive 0.1-5 weight%. The hybrid photocurable coating composition comprises an acrylic monomer or oligomer, a colloidal inorganic oxide, a silane compound and a colloid stabilizer. The additive is one selected from a slipping agent, an anti-fouling agent and a UV stabilizer.

Description

An antistatic cover of tray for a display panel and the manufacturing method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for a display panel protective tray such as an LCD panel, and more particularly, to an antistatic cover of a display panel protective tray including an antistatic layer on at least one surface and excellent in scratch resistance and stain resistance. will be.

With the high integration of electronic components and semiconductors, the problem of product defects caused by static electricity is on the rise, and many efforts are being made to minimize the damage caused by static electricity. Static electricity affecting parts in assembling or using electronic parts is generated from the human body of the worker, the work space, the parts themselves, the worker or the packaging materials during the assembly and packaging, and the transportation process. Occupies. Therefore, the tray required for storing and transporting the finished electronic component should have an antistatic function.

However, conventionally, only an antistatic function is provided to the tray, but a general plastic resin is used for the lid of the tray. However, since the cover of the tray generates a lot of static electricity during storage and transportation of electronic components due to the generation of dust, etc. in accordance with the opening and closing, particularly antistatic treatment is required.

However, if the antistatic treatment is performed in a general manner, it is bent for opening and closing and safe storage, etc. In this case, if the antistatic treatment is performed, the coating layer may be cut in the bent portion, which may cause a problem of inferior antistatic performance. .

In general, as an antistatic treatment method, there is a coating method used by coating an antistatic agent on the surface of the base plastic which is an insulator, and an internal additive method which is prepared by mixing an antistatic additive when manufacturing the base plastic.

As the coating method manufactures an antistatic film and sheet using various coating methods on the base plastic, it not only has excellent productivity, but also freely adjusts the surface resistance (102 to 1010 Ω / sq) according to the physical properties of the antistatic coating solution. It has the advantage of being able to. On the other hand, the internal additive method of adding and mixing an antistatic agent to the base plastic, which is an insulator, has advantages of surface conductivity, top and bottom conductivity, solvent resistance, and abrasion resistance, but is difficult to apply to various base plastics, has no transparency, and is relatively relative to the coating method. Because of the disadvantage that the surface resistance (109 ~ 1011 Ω / sq) falls, the coating method is preferred.

However, the coating method is inferior in scratch and fouling resistance properties to be provided as an antistatic cover of a next-generation LCD panel protection tray when using a conventional coating composition, that is, when using a conventional thermosetting and photocurable antistatic coating agent. It has a disadvantage.

The present invention is to solve the above problems, another object of the present invention is to provide an antistatic cover of the display panel protection tray excellent in scratch resistance and stain resistance.

Still another object of the present invention is to provide a method for manufacturing an antistatic cover of a tray for protecting a display panel having excellent scratch resistance and stain resistance.

In order to achieve the above object, the present invention

Basal sheet; And

At least one surface of the base sheet includes an antistatic layer,

10 to 40% by weight of the organic-inorganic hybrid photocurable coating composition wherein the antistatic layer comprises an acrylic monomer or oligomer, a colloidal inorganic oxide, a silane compound, and a colloidal stabilizer; 3 to 30% by weight of the conductive polymer; 0.1-5% by weight of photoinitiator or curing agent; 40 to 80% by weight of an organic solvent; And an antistatic coating composition comprising 0.1 to 5% by weight of at least one additive selected from a slip agent, a stain resistant agent, and an ultraviolet stabilizer.

In order to achieve another object of the present invention, the present invention

Coating at least one side of the base sheet with an antistatic coating composition,

10 to 40% by weight of the organic-inorganic hybrid photocurable coating composition wherein the antistatic coating composition comprises an acrylic monomer or oligomer, a colloidal inorganic oxide, a silane compound, and a colloidal stabilizer; 3 to 30% by weight of the conductive polymer; 0.1-5% by weight of photoinitiator or curing agent; 40 to 80% by weight of an organic solvent; And it provides a method for producing an antistatic cover of the display panel protective tray which is an antistatic coating composition comprising 0.1 to 5% by weight of at least one additive selected from a slip agent, a stain resistant agent, an ultraviolet stabilizer.

Method for producing an antistatic cover of the tray is the step of heat curing after the coating sugar, 1 to 10, preferably 2 to 5 minutes at 70 ~ 90 ℃, preferably 80 ℃ temperature; And

The method may further include irradiating ultraviolet rays of 300 to 500 mJ / cm 3 light quantity.

The ultraviolet rays are preferably irradiated at 400 mJ / cm 3.

Examples of the base plastic include polyolefin-based polyethylene, polypropylene, and the like, and one or two or more multilayers selected from polyester-based polyethylene terephthalate and polycarbonate, and polycarbonate-polymethylmethyl acrylate. Bilayers, such as polycarbonate-polystyrene copolymer (PS, ABS), may be used, and in general, any may be used in the art.

The organic-inorganic hybrid photocurable coating composition comprises 20 to 70 wt% of an acrylic monomer or oligomo, 20 to 45 wt% of a colloidal inorganic oxide, 3 to 15 wt% of a silane compound, and 7 to 20 wt% of a colloidal stabilizer. Can be.

In addition, the organic-inorganic hybrid photocurable coating composition may further include additives such as UV stabilizers or ultraviolet absorbers as necessary.

Hereinafter, the present invention will be described in more detail.

Conventionally, the cover of the display panel protection tray only uses a base plastic such as polycarbonate, so that even if an antistatic tray is used, it is difficult to prevent contamination, static electricity, and the like due to the cover. However, according to the present invention, by using the antistatic cover, it is possible to completely prevent the generation of static electricity in the transportation and storage of electronic components and the like.

In addition, the photocurable antistatic coating composition, which is generally used for antistatic treatment of a conventional tray, is a composition containing a conductive polymer, a binder containing an acrylic monomer and an oligomer, a photoinitiator and a solvent, and the like. Although used in the method of manufacturing an antistatic sheet by coating, the antistatic sheet coated with a conventional coating composition is not only loses the charging function due to breakage of the coating layer portion when the bending is greatly increased the surface function, the film hardness and wear resistance There was a problem that this greatly decreased.

Therefore, such an antistatic coating composition is suitable for opening and closing, such as a cover of the tray, the cover sheet that must be bent at any time, the coating layer portion is broken during bending, the antistatic function is more easily lost and can not exhibit the original function, it is suitable Not.

However, the antistatic cover of the antistatic tray according to the present invention can prevent contamination due to static electricity due to the antistatic function, and can safely transport and store the display panel without losing the antistatic layer due to bending even if used for a long time. It becomes possible. In addition, the scratch resistance is increased to minimize the scratches from the outside to maximize the appearance and stability of the panel.

According to one embodiment of the invention, 10 to 40% by weight of the photocurable coating composition comprising an acrylic monomer or oligomer, a colloidal inorganic oxide, a silane compound and a colloidal stabilizer; 3 to 30% by weight of the conductive polymer; 0.1-5% by weight of photoinitiator or curing agent; 40 to 80% by weight of an organic solvent; And an antistatic coating composition comprising 0.1 to 5% by weight of at least one additive selected from slip agents, stain resistant agents and ultraviolet stabilizers.

According to yet another embodiment of the present invention, there is provided an article comprising: a base sheet; And an antistatic layer on at least one surface of the base sheet, wherein the antistatic layer comprises an acrylic monomer or oligomer, a colloidal inorganic oxide, a silane compound, and a colloidal stabilizer 10 to 40 wt% of an organic-inorganic hybrid photocurable coating composition. ; 3 to 30% by weight of the conductive polymer; 0.1-5% by weight of photoinitiator or curing agent; 40 to 80% by weight of an organic solvent; And an antistatic coating composition comprising 0.1 to 5% by weight of at least one additive selected from a slip agent, a stain resistant agent, and an ultraviolet stabilizer.

When the content of the photocurable composition is less than 10% by weight, wear resistance and scratch resistance are lowered. When the content of the photocurable composition is greater than 40% by weight, basic physical properties are increased but surface resistance is decreased. When the content of the water-dispersible conductive polymer is less than 3% by weight, the surface resistance is decreased, and when the content of the water-dispersible conductive polymer is greater than 30% by weight, the surface resistance is excellent but the permeability, abrasion resistance, and scratch resistance may be degraded. In the case of the organic solvent, if the content is less than 40% by weight, it may cause difficulty in permeability and workability, and in the case of more than 80% by weight, physical properties may be reduced in wear resistance and scratch resistance.

The organic-inorganic hybrid photocurable coating composition comprises 20 to 70 wt% of an acrylic monomer or oligomo, 20 to 45 wt% of a colloidal inorganic oxide, 3 to 15 wt% of a silane compound, and 7 to 20 wt% of a colloidal stabilizer. Can be.

If the content of the acrylic monomer or oligomer in the organic-inorganic hybrid photocurable hard coating composition is less than 20% by weight, the viscosity is increased during the preparation of the sol-gel, and the synthesis is not easy, and the photocurable hard coating composition is more than 70% by weight. Synthesis by viscosity at the time of manufacture is easy, but the film hardness may be reduced. If the content of the colloidal inorganic oxide is less than 20% by weight, wear resistance and scratch resistance may decrease, and when the content of the colloidal inorganic oxide exceeds 45% by weight, the physical properties increase, but the viscosity increases, so that the synthesis is not easy. In the case of the silane compound, the coupling effect is reduced when less than 3% by weight, and when it exceeds 15% by weight, the physical properties may be affected. In the case of colloidal stabilizer, the content of sol-gel may be aggregated and precipitated when the content is less than 7% by weight. If the content is more than 20% by weight, the sol-gel may be stabilized but may affect physical properties.

The tray cover of the present invention may use a relatively light thermoplastic resin, the material is strong and light material is suitable. It is also possible to use sheets in which these materials consist of double plates.

The said acrylate monomer uses many acrylate groups and methacrylate groups. In the present invention, single tubes such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxypentyl (meth) acrylate and hydroxyhexyl (meth) acrylate Functional monomers with 1,6-hexanediol di (meth) acrylate, triphenylglycol diacrylate, butanediol diacrylate, 1,3-butylene glycol dimethacrylate, neopentylglycol diacrylate, ethylene glycol diacrylate 2 such as methacrylate, diethylene glycol di (meth) acrylate, triethylene glycol diacrylate, polyethylene glycol di (meth) acrylate, dipropylene glycol diacrylate, methoxylated neopentylglycol diacrylate Functional monomers and trimethylolpropane tri (meth) acrylate, pentaerythritol triacrylate, ethoxylay Tide trimethylol propane triacrylate, propylated trimethylol propane triacrylate, glyceryl propylated triacrylate, tris (2-hydroxyethyl) isocyanurate triacrylate, dipentaerythritol hydroxypentaacryl One or more polyfunctional monomers, such as a rate, a trimethylol propane methoxylated triacrylate, and a trimethylol propane ethoxylated triacrylate, can be used.

Silica may be used as the colloidal inorganic oxide, and may be mixed with the colloidal metal oxide. The colloidal inorganic oxide may be in the form of powder, gel or sol, but the sol form is most preferred. In the sol state colloidal inorganic oxide particles are dispersed in the liquid medium. Sols useful for carrying out the invention may be prepared by conventional methods well known in the art, and suitable sols may use commercially available products. For example, colloidal silica dispersed as a sol in an aqueous solution is preferable.

The crosslinkable silane compound contains a hydrolyzable silane moiety and a polymerizable moiety other than the silane moiety, and may be methyltrimethoxysilane, dimethylmethoxysilane, 3-aminopropyltriethoxysilane, or 3-aminopropyl diethoxymethyl. Silane, 3-aminopropyltrimethoxysilane, vinyltris (β-methoxy) silane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane And silicon substituted with an alkoxy functional group.

Examples of the conductive polymer include water-soluble polyaniline, water-soluble polypyrrole, water-soluble polythiophene, water-soluble poly (3,4-ethylenethiophene), derivatives and copolymers thereof, and π-conjugated electric soluble in water-soluble and organic solvents. Conductive polymers.

Examples of the photopolymerization initiator include benzoin ethers such as benzoin methyl ether and benzoin isopropyl ether, and substituted benzoin ethers such as anisole methyl ether, 2,2-diethoxy acetophenone, and 2,2-dimethoxy-2-. Aromatic sulfonyls such as substituted acetophenones such as phenylacetophenone, substituted α-ketols such as 1-hydroxycyclohexyl-phenyl-ketone, and 2-methyl-2-hydroxypropiophenone, and 2-naphthalenesulfonyl chloride Photoactive oximes such as chloride, 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime, and the like can be used.

As a colloidal stabilizer, acrylloyl mrpholine and acrylamide-based dimethyl (meth) acrylamide (N, N'-dimethyl (meta) acrylamide: DMA) may be used, and the surface slip property of the hard coating layer may be used. By adding a little more wear resistance and scratch resistance can be improved.

The additives added to the photocurable antistatic coating composition of the present invention include slip agents, stain resistant agents, and the like, which may be used alone or in combination.

As the slip agent, a silicon-based material may be generally used, and a siloxane copolymer, a modified polysiloxane, or the like may be used.

As antifouling agents, functional antifouling and moisture proof additives are fluorine-urethane copolymerized polymers. Perfluorinated alkyl alcohols and functional isocyanate comonomers are polymerized by the reaction of hydroxyl radicals and isocyanine groups by free radical polymerization. Perfluorine urethane copolymer prepared by, or comprises a fluorine composition comprising a compound or oligomer having at least one or more fluorine-containing end groups and polymers that are a continuous unit thereof. In the fluorine-urethane copolymer polymer, n is 1 to 20 in the perfluorine group [CF 3 (CF 2) n functional functional group], and the average molecular weight of the fluorine-urethane copolymer polymer is preferably 1,000 to 10,000.

Organic solvents include dimethyl sulfoxide (DMSO), dimethylformamide (DMF), N-methyl-2-pyrrolidinone (NMP), ethylene glycol (EG), propylene glycol methyl ether, 2-butanone, 4-methyl -2-pentanone, ethyl cellosolve, methyl cellosolve, methyl alcohol, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol, di-acetone alcohol, ethylene glycol, etc. May be used alone or in combination. Among these, dimethyl sulfoxide (DMSO), N-methyl-2-pyrrolidinone (NMP), ethylene glycol, isopropyl alcohol, methyl cellosolve, etc. are preferable.

After the photocurable antistatic composition according to the present invention is coated on the base plastic sheet for the cover of the display panel protection tray by gravure coating, comma coating, roll coating, bar coating, dip coating, flow coating, spray coating, or the like. After the thermosetting drying for 1 to 10 minutes in the temperature range of 60-90 ℃ completely removes the organic solvent in the coating composition may be irradiated and cured ultraviolet light of 250 to 600 mJ / cm 3 light amount to prepare an antistatic film.

As described above, the present invention provides an antistatic display panel protection tray having excellent scratch resistance and stain resistance, which is coated by an antistatic organic-inorganic hybrid photocurable coating agent coated on at least one end surface of a polyolefin, polycarbonate, and polyester sheet. The cover can minimize dust adhesion or contamination that may occur during display panel manufacturing, assembly, shipment, transportation, and storage, and in particular, it can minimize scratches from the outside that may occur during transportation. And the stability can be maximized, and also the loss of antistatic function is small even in long-term use.

The present invention will be described in more detail with reference to the following Examples. However, the following examples are only preferred examples of the present invention, and the present invention is not limited to the following examples.

Example  One

Acrylic monomer (20% by weight of dipentaerythritol hexaacrylate, 39.4% by weight of Pentaerythritol triacrylate, Miwon Co.) 59.4% by weight, 25% by weight of water-dispersed silica sol (Nalco 2327, NALCO Co.) as an inorganic oxide, silane compound (3-methacrylocxa propyl trimethoxy silane , Shin-etsu chemical Co.) 5 wt%, colloidal stabilizer (acryloyl morpholine, SATOMER Co.) 10 wt%, UV stabilizer (BYK-307, BYK Co.) 0.5 wt%, UV absorber (Tinubin 3270, Ciba Geigy Co.) 0.1% by weight of vacuum at 55 ℃ to remove the water and ethanol to complete the reaction to prepare an organic-inorganic hybrid photocurable coating composition. 10 wt% of poly (3,4-ethylenedioxythiophene) (Baytron PH, Bayer Co.), a water-soluble dispersion, 20 wt% of the photocurable coating composition, 1 wt% of a photocuring agent (Igacure 184, Ciba Geigy Co.), 0.3 wt% of slip agent (Tego glide 450, Tego Co.), 0.2 wt% of fouling agent (Oleothodol-sla-01, CiBA), organic solvent (25 wt% of isopropyl alcohol, 20 wt% of methyl cellosolve, propylene A photocurable antistatic hard coating composition was prepared by adding 20 wt% of glycol metel ether and 68.5 wt% of ethylene glycol).

Surface resistance of the antistatic cover sheet of the tray prepared according to the present embodiment showed 5 x 106Ω / sq when measured under the conditions of 55% RH, 23 ℃, 500V applied voltage according to ASTM D257 measuring method.

Example  2

Instead of using the polycarbonate sheet in Example 1 was coated by using a spray coating method on a polyolefin-based polypropylene sheet and then thermally cured and dried at 80 ℃ temperature for 3 minutes to remove the solvent in the coating composition 400 mJ / cm 3 light amount Ultraviolet light was irradiated to prepare an antistatic tray lid sheet.

Example  3

Instead of using a polycarbonate sheet in Example 1 was coated using a polyester coating polyethylene terephthalate sheet using a spray coating method and then thermally cured and dried at 80 ℃ temperature for 3 minutes to remove the solvent in the coating composition 400 mJ / An antistatic tray lid sheet was prepared by irradiating with an ultraviolet ray of a cm 3 light amount.

Example  4

30% by weight of a water-soluble dispersion poly (3,4-ethylenedioxythiophene) (Baytron PH, Bayer Co.) in 10% by weight of the organic-inorganic hybrid photocurable coating composition prepared in Example 1, an organic solvent (isopropyl) An antistatic cover sheet was prepared in the same manner as in Example 1 except that the weight was changed to 25% by weight of alcohol, 20% by weight of methyl cellosolve, 10% by weight of propylene glycol methyl ether, and 58.5% by weight of ethylene glycol. Prepared.

Example  5

5 wt% of an aqueous dispersion of poly (3,4-ethylenedioxythiophene) (Baytron PH, Bayer Co.) in 35 wt% of the organic-inorganic hybrid photocurable coating composition prepared in Example 1, an organic solvent (isopropyl) An antistatic cover sheet was prepared in the same manner as in Example 1 except that the weight was changed to 25% by weight of alcohol, 20% by weight of methyl cellosolve, 10% by weight of propylene glycol methyl ether, and 58.5% by weight of ethylene glycol. Prepared.

Comparative example  One

10% by weight of poly (3,4-ethylenedioxythiophene) (Baytron PH, Bayer Co.) as a water-soluble dispersion in 20% by weight of acrylic monomer (Dipentaerythritol hexaacrylate, 10% by weight Pentaerythritol triacrylate, Miwon Co., Ltd.) composition 1 wt% of Igacure 184, Ciba Geigy Co., 0.3 wt% of slip agent (Tego glide 450, Tego Co.), organic solvent (25 wt% of isopropyl alcohol, 20 wt% of methyl cellosolve, propylene glycol metel) A photocurable antistatic hard coating composition was prepared by adding 20 wt% ether and 3.7 wt% ethylene glycol) 68.7 wt%.

The antistatic coating composition was coated on a polycarbonate sheet using a spray coating method, and then thermally cured and dried at 80 ° C. for 3 minutes to remove the solvent in the coating composition. Then, the antistatic tray was irradiated with ultraviolet light of 400 mJ / cm 3 light. A cover sheet was prepared.

Comparative example  2

An antistatic cover sheet was prepared in the same manner as in Example 1 except that the content of the organic-inorganic hybrid photocurable coating composition was changed to 5 wt% and the organic solvent was 84.5 wt%.

Comparative example  3

An antistatic cover sheet was prepared in the same manner as in Example 1 except that the content of the organic-inorganic hybrid photocurable coating composition was changed to 45 wt% and the organic solvent was 43.5 wt%.

The physical property test results of the antistatic sheet prepared in Examples 1 to 5 and Comparative Examples 1 to 3 are shown in Table 1 below.

Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Surface Resistance (Ω / sq) 5 x 10 ⁶ 7 x 10 ⁶ 2 x 10 ^{6 5} x 10 ⁵ 9 x 10 ⁶ 9 x 10 ⁶ 2 x 10 ⁶ 4 x 10 ⁷ Scratch resistance o o o o o x x o Wear resistance (mg) 60 61 63 68 58 180 145 57 Contact angle 89 90 92 94 83 67 89 80 Surface resistance after bending 6 x 10 ⁷ 8 x 10 ⁷ 4 x 10 ⁷ 7 x 10 ⁶ 9 x 10 ⁷ 8 x 10 ⁹ 3 x 10 ⁷ 9x10 ⁸

(How to measure)

1.Surface Resistance: Measuring Equipment-Mitsubishi MCP-T600 SIMCO TRUSTATTM, measured 5 times by 4 terminal current method (international certified) for each measuring point and recorded the average value.

2. Contact angle: measuring instrument-Dynamic Contact Angle Model: Phoenix 450, The contact angle of a liquid in contact with a flat solid surface is measured at the liquid-solid-gas junction. As the contact angle increases, the antifouling performance is excellent.

3. Scratch resistance: Visually check the surface after rubbing 10 times using steel wool.

4. Wear resistance: CS-17 Abrasive stone for weight loss after 1000 rubs.

5. Measurement of surface resistance after bending: After bending the antistatic sheet prepared in Examples 1 to 5 and Comparative Examples 1 to 180 degrees, the measuring device-Mitsubishi MCP-T600 SIMCO TRUSTATTM by measuring the four-terminal current method for each point Recorded an average of 5 times with (International Certified).

1 is a perspective view of an antistatic cover of an LCD panel protective tray manufactured according to an embodiment of the present invention.

Claims (8)

Basal sheet; And At least one surface of the base sheet includes an antistatic layer, 10 to 40% by weight of the organic-inorganic hybrid photocurable coating composition wherein the antistatic layer comprises an acrylic monomer or oligomer, a colloidal inorganic oxide, a silane compound, and a colloidal stabilizer; 3 to 30% by weight of the conductive polymer; 0.1-5% by weight of photoinitiator or curing agent; 40 to 80% by weight of an organic solvent; And an antistatic composition comprising 0.1 to 5% by weight of at least one additive selected from a slip agent, a stain resistant agent, and an ultraviolet stabilizer. An antistatic cover of a tray for protecting a display panel, wherein the base sheet is a double layer of polycarbonate-polymethmethylacrylate or polycarbonate-polystyrene copolymer (PS, ABS). The method of claim 1, The organic-inorganic hybrid photocurable coating composition comprises 20 to 70% by weight of an acrylic monomer or oligomo, 20 to 45% by weight of a colloidal inorganic oxide, 3 to 15% by weight of a silane compound and 7 to 20% by weight of a colloidal stabilizer. An antistatic cover of a tray for protecting a display panel. The method of claim 1, The antistatic cover of the display panel protective tray, characterized in that the colloidal inorganic oxide is silica. The method of claim 3, The antistatic cover of the display panel protective tray, characterized in that the silica is used in combination with the colloidal metal oxide. The method of claim 1, The conductive polymer is selected from water-soluble polyaniline, water-soluble polypyrrole, water-soluble polythiophene, water-soluble poly (3,4-ethylenethiophene), derivatives or copolymers thereof, and π-conjugated electrically conductive polymers soluble in water-soluble and organic solvents. Antistatic cover of the display panel protective tray, characterized in that at least one. delete delete Coating at least one side of the base sheet with an antistatic coating composition; After the coating step, the step of thermosetting drying for 1 to 10 minutes at a temperature of 70 ~ 90 ℃; And Irradiating ultraviolet rays of 300-500 mJ / cm 3 light quantity, The base sheet is a double layer of polycarbonate-polymethmethylacrylate or polycarbonate-polystyrene copolymer (PS, ABS).

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