KR101590147B1 - Anti-static form sheet - Google Patents

Abstract

A purpose of the present invention for removing a problem is providing an anti-static foam sheet horizontally stacking multiple display glasses and, more specifically, not causing adhesion and foreign material transition caused by increase in surrounding temperature on the surface of an anisotropic conductive film (ACF) or the surface of a glass in a process of packing and transferring the display glasses; protecting the display glasses from impact or moisture; and minimizing scratch on the surfaces of the glasses. Provided in the present invention for achieving the purpose is an anti-static foam sheet comprising a base sheet; and an anti-static film formed on at least one side of the sheet, wherein the anti-static film is made of multiple layers in which a film having excellent moisture resistance and heat resistance and a polyethylene film are laminated.

Description

Anti-static form sheet

The present invention relates to an antistatic horizontal laminated foil separator for a display glass formed from a non-crosslinked foam comprising a multi-layer film having excellent moisture-proof property and heat resistance on at least one surface in a foam sheet in order to minimize surface- Specifically, in the packaging and transportation of display glass, there is no adhesion phenomenon and foreign matter metastasis due to the increase of the ambient temperature on the surface of the ACF (Anisotropic Conductive Film) or the glass surface, the display glass is protected from impact and moisture, Which is capable of minimizing the cost of the anti-static foam.

Thin-film displays such as plasma display panels, thin-film transistor liquid crystal displays (TFT-LCDs), and organic EL (OLEDs), which are excellent in various display capabilities such as display capacity, luminance, contrast, afterimage and viewing angle, It is a trend to rapidly advance into business. In addition, as the display becomes larger, the glass substrate used as a substrate material of a flat panel display panel such as a liquid crystal monitor panel or a plasma display panel is also becoming larger. Accordingly, in order to load and transport the glass for display, the glass is vertically stacked in a packaging box composed of a frame such as a storage portion and a cover having corrugated grooves as thick as the glass, Loading.

In the case of a vertically stacked type packaging box, it is necessary to provide a corrugated groove of the thickness of the glass substrate in the box so that the glass can be stacked in the vertical direction, and there is a limit to the number of glass sheets that can be stacked. In addition, it is difficult to mold the corrugated grooves in the packaging box with a current styrofoam mold to a thickness of 10 mm or less. On the other hand, according to the trend of slimmer communication devices, the thickness of the glass substrate is made slimmer, There is a falling problem. Therefore, it is advantageous to load a plurality of glasses in a horizontal direction rather than in a vertical direction according to the trend of enlargement and thinning of the glass. However, in the case of horizontal loading, there is a possibility that physical properties are changed and damaged by small impact during static transportation and generation of static electricity. In order to solve this problem, we tried to prevent breakage of glass and change of properties by inserting laminated support between glass substrates. However, plastic such as EPP and EPS which have been conventionally used as a laminate support has a property of accumulating static electricity generated by friction with other materials for a long time due to its electrical insulating property, which is caused by static electricity, There is a problem that the image defect rate increases. Accordingly, although a laminated support exhibiting charging performance by using carbon black, a surfactant, or a metal oxide as an internal type was used, the surface resistance (10E5? / Sq.) Is excellent when carbon black or metal oxide is used, , And the antistatic laminated support using a surfactant has transparency but has a disadvantage that migration is very serious and a reaction is very sensitive to temperature and humidity changes and surface resistance (10E9 Ω / Cm < 2 >) is increased.

In addition, in the case of an antistatic laminate support using a non-crosslinked foam instead of an electron beam crosslinked foam and at least one side of an antistatic PE foam, there is a disadvantage of sticking to an ACF (Anisotropic Conductive Film) film and a problem of being transferred to the glass surface have.

In order to solve the above problems, an object of the present invention is to provide a display device capable of horizontally stacking a plurality of display glasses, and more particularly, to an ACF (Anisotropic Conductive Film) surface or a glass surface It is an object of the present invention to provide an antistatic foam sheet which has no adhesion phenomenon and no foreign matter metastability, can protect the display glass from impact and moisture, and can minimize the occurrence of surface scratches.

In order to achieve the above object, And an antistatic film formed on at least one side of the sheet, wherein the antistatic film is composed of a multilayered film of a film excellent in moisture resistance and heat resistance and a polyethylene film.

The antistatic foam sheet according to the present invention allows the display glass to be stacked horizontally, so that a plurality of display glasses can be stacked rather than vertically stacked. The antistatic foam sheet of the present invention protects the display glass from shock and moisture, has no clinging phenomenon due to the ambient temperature rise on the ACF (Anisotropic Conductive Film) surface or on the glass surface during the packaging and transportation of the display glass, The occurrence of surface scratches can be minimized.

Therefore, when the antistatic foam sheet of the present invention is used, there is no problem such as denaturation, breakage, and dust of physical properties, and transportation and operation of the display glass are further facilitated. In addition, the antistatic foam sheet of the present invention uses an internal-type composition to provide an antistatic effect, but also a simple manufacturing process and a cost saving.

1 shows an antistatic foam sheet for a display glass according to an embodiment of the present invention.

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

1, the present invention relates to a substrate sheet 10, And an antistatic film (20) formed on at least one side of the sheet, wherein the antistatic film is composed of a multilayered film of a film excellent in moisture resistance and heat resistance and a polyethylene film, to provide.

<Base Sheet>

According to an embodiment of the present invention, the base sheet 10 may be formed of a foam made of low foaming, high foaming crosslinking or chemical crosslinking. More specifically, the present invention relates to a polyolefin-based foam sheet produced by non-crosslinking or chemical crosslinking; Polyurethane foam sheet; Or an ethylene vinyl acetate (EVA) foam sheet prepared by pressure crosslinking; however, the present invention is not limited thereto.

<Antistatic Film>

According to one embodiment of the present invention, the antistatic film is composed of multiple layers of a film and a polyethylene film laminated with a film excellent in moisture resistance and heat resistance.

According to one embodiment of the present invention, the film having excellent moisture resistance and heat resistance includes polyamide, nylon, polyolefin, polyester, polyimide, polystyrene, and ethylene vinyl acetate, Polyamide-based nylon is preferred.

According to one embodiment of the present invention, the polyethylene film is preferably selected from HDPE, LDPE, LLDPE and MDPE.

According to one embodiment of the present invention, the antistatic film 20 is laminated on at least one side of the base sheet 10. The antistatic film 20 may be antistatic, including a coating layer coated with an antistatic coating composition containing an antistatic composition or an antistatic agent. As a result, the antistatic effect is excellent, and the heat resistance and weather resistance are excellent.

Wherein the antistatic coating composition comprises 0.1 to 30% by weight of at least one selected from the group consisting of conductive polymers, graphene and carbon nanotubes; 2 to 35% by weight of a thermosetting binder; 10 to 40% by weight of water; 20 to 75% by weight of an organic solvent; And 0.1 to 5% by weight of at least one additive selected from an anti-blocking agent, a slip agent, a wetting agent and a UV stabilizer.

Alternatively, the antistatic coating composition may contain 0.1 to 30% by weight of at least one selected from among a conductive polymer, a graphene, and a carbon nanotube; 5 to 40% by weight of a photocurable binder; 0.1 to 5% by weight of a photoinitiator; From 40 to 75% by weight of an organic solvent; And 0.1 to 5% by weight of at least one additive selected from an anti-blocking agent, a slip agent, a wetting agent and a UV stabilizer.

Examples of the conductive polymer include organic electroconductive polymers having a copolymer, in particular, polyaniline, polypyrrole, polyethylene dioxythiophene (PEDOT), and polythiophene series. Preferably, the conductive polymer is an organic conductive polymer having a resonance structure such as polyaniline, polypyrrole, or polythiophene (PEDOT).

The carbon nanotube is a tube-shaped molecule formed by rounding a graphite plate composed of six hexagonal rings connected to each other. The carbon nanotubes are excellent in rigidity and electrical conductivity, so that the film hardness is increased and the antistatic function is improved. In addition, since it is not decomposed when exposed to ultraviolet rays or heat, the weatherability is increased as compared with the case of using a conductive polymer or the like.

The carbon nanotubes preferably have a length of 1 to 60 탆 and a diameter of 0.1 to 50 nm. Within this range, transparency or dispersibility is excellent.

The thermosetting binder may be selected from the group consisting of a urethane resin, an acrylic resin, a urethane-acrylic copolymer, a polyimide, a polyamide, a polyether resin, a polyolefin resin and a melamine resin or a mixture thereof. But is not limited thereto.

Specific examples of the organic solvent include dimethylsulfoxide (DMSO), dimethylformamide (DMF), N-methyl-2-pyrrolidinone (NMP), 2-butanone, May be selected from the group consisting of alcohols, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol and ethylene glycol or a mixture thereof, preferably methyl alcohol, ethyl alcohol, isopropyl alcohol, Butanol, isobutyl alcohol, t-butyl alcohol, benzyl alcohol, or ethylene glycol, but is not limited thereto.

The photocurable binder may be selected from the group consisting of pentaerythritol triacrylate (PETA), dipentaerythritol pentaacrylate (DPPA), dipentaerythritol hexaacrylate (DPHA), trimethylolpropane triacrylate (TMPTA), etc. Or as a curable bonding precursor, aliphatic urethane acrylate oligomers having 3 to 15 functionalities, but are not limited thereto.

The additives included in the thermosetting electrification composition or the photocurable electrification composition may preferably be selected from the group consisting of fluorine-based, silicone-based, cationic, anionic, or zwitterionic surfactants, or a mixture thereof. The additive can improve the flowability, antifouling property, dispersibility and leveling property when the conductive polymer composition is coated.

The anti-blocking agent may be a polyether siloxane copolymer, an organo-modified polysiloxane, a polyether-modified polydimethylsiloxane, a methacryloxy functional silicone, , Siliconic glycol with carbinol functionality, alkylmethylsiloxane, silicone glycol, or derivatives or copolymers thereof, which may be in the form of an aqueous or oily silicone additive .

The ultraviolet stabilizer improves the weatherability of the antistatic product and reduces the yellowing caused by ultraviolet rays. The ultraviolet stabilizer may include a benzophenol-based or benzotriazole-based stabilizer.

More specifically, the thermosetting antistatic composition is coated on one side of the polyolefin film at a thickness of 0.1 to 10 탆 by a method such as gravure, offset, kiss bar, knife, Meyer bar, After the coating, the antistatic layer can be formed by curing at 50 to 250 ° C for 30 seconds to 30 minutes to crosslink.

Alternatively, the photocurable antistatic composition may be coated on one surface of the olefinic film to a thickness of 0.1 to 10 탆 using gravure, offset, kiss bar, knife, Meyer bar, magic, roll or spray method , And dried at a temperature of 50 to 250 ° C for 1 to 10 minutes to completely remove the organic solvent in the composition, and then irradiated with ultraviolet light of 250 to 600 mJ / cm 3 to cure the antistatic layer.

According to an embodiment of the present invention, the antistatic film 20 may be formed by mixing the anti-static antistatic composition with 1 to 60% by weight of the resin having excellent moisture resistance and heat resistance. When the anti-static antistatic composition is mixed in an amount of less than 1% by weight, the antistatic effect is insufficient and it may be difficult to achieve the object of the present invention. If the antistatic composition is mixed in an amount exceeding 60% by weight, the physical properties of the synthetic resin may be affected .

The resin having excellent moisture resistance and heat resistance can be mixed with an antistatic antistatic composition and is composed of a nylon series, a polyamide series, a polyolefin series, a polyester series, a polyimide series, a polystyrene series, an EVA series, &Lt; / RTI &gt; or a mixture thereof.

The anti-static antistatic composition comprises 0.1 to 50% by weight of at least one selected from graphene, carbon nanotube and carbon; 0.1 to 5% by weight of an additive selected from the group consisting of a heat stabilizer, a plasticizer, a UV stabilizer and a dispersant, or a mixture thereof, and 45 to 98% by weight of a polymer resin as a base material.

When the graphene or carbon nanotube is contained in an amount of less than 0.1% by weight, the surface resistance of the antistatic product may increase and the effect of improving the weatherability is insignificant. When the content exceeds 50% by weight, And when added to a polymer resin, the physical properties of the polymer resin can be lowered.

The additive includes at least one selected from the group consisting of heat stabilizers, plasticizers, ultraviolet stabilizers and dispersants.

The additive may be included in an amount of 0.1 to 5% by weight based on the anti-static antistatic composition. If it is contained in an amount of less than 0.1% by weight, the effect due to the addition of the additive is insignificant, and if it is more than 5% by weight, the properties of the antistatic film such as rigidity may be deteriorated.

The polymer resin may be at least one selected from the group consisting of polyolefin resins, polyesters (trichlorosilane of PET A, PET G, PET G-PET A-PET G), polystyrene, polyimide, polyamide (nylon), polysulfonate, polycarbonate, , Polyvinyl acetal, polymethyl methacrylate, polyvinyl chloride, polyethylene, polypropylene, modified polyphenylene oxide, SBS, SAN, synthetic rubber, phenol resin, epoxy resin, acrylic resin, urethane resin, Blends or copolymers, or a mixture thereof.

And may further include a compatibilizer in the mixing process. The compatibilizing agent serves to increase the mixing property of the anti-static antistatic composition and the polymer resin. Examples of the compatibilizing agent include an olefin-based polymer, an ethylene-propylene block copolymer, a maleic acid grafted or copolymerized polystyrene, an acrylic group-containing polymer (polymethyl methacrylate, poly (styrene- Styrene-butylene-styrene copolymer, styrene-ethylene-butylene-styrene copolymer, styrene-ethylene-butylene-styrene copolymer, maleic acid-grafted styrene- Styrene-3 copolymer, or a mixture thereof. The compatibilizing agent may be included in an amount of 0.1 to 5% by weight based on the polymer resin. If it is contained in an amount of less than 0.1% by weight, compatibility is reduced, and if it is contained in an amount exceeding 5% by weight, the surface resistance of the antistatic product increases.

Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples. This is for the purpose of illustrating the present invention, and thus the scope of the present invention is not limited thereto.

< Multi-layer  Production of Film>

< Manufacturing example  1> Multi-layer  Film manufacturing

Nylon (15um) / HDPE (25um) film (total thickness 40um) was simultaneously produced in the form of nylon / adhesive / PE at a temperature of 100-200 ° C using a blowing PE extruder. The nylon surface was further treated with a corona treatment of 38 dyne / cm ² or more.

< Manufacturing example  2> Multi-layer  Film manufacturing

15 μm nylon film and 25 μm HDPE film were coated on a nylon film using a dry laminator and then adhered at a temperature of 60 to 150 ° C. to produce a nylon (15 μm) / HDPE (25 μm) film Respectively. Corona treatment on nylon surface 38 dyne / cm ² Were further processed.

< Manufacturing example  3> Inner shape  Antistatic Multi-layer  Film manufacturing

(15 ㎛) / HDPE (25 ㎛) film at the same temperature in the form of nylon / adhesive / PE with 4 ~ 10% of carbon nanotubes added at 100 ~ 200 ℃ using blown PE extruder Thickness: 40 mu m).

< Manufacturing example  4> Inner shape  Antistatic Multi-layer  Film manufacturing

Carbon nanotubes A 15 μm nylon film containing 4 to 10% of an electrification agent and a 25 μm HDPE film were coated on a nylon film using a dry laminator and adhered at a temperature of 60 to 150 ° C. to form an antistatic nylon ) / HDPE (25 탆) film (total thickness 40 탆).

&Lt; Preparation of antistatic coating composition >

< Manufacturing example  5> Thermosetting type  Preparation of Antistatic Coating Composition

5 wt% of conductive polymer (PEDOT, Agfa), 5 wt% of acryl-urethane copolymer binder (Stahl Asia Pte Ltd., WF-4644), water 29 wt%, isopropyl alcohol 50 wt%, slip agent 0.5 wt% And 0.5% by weight of an antistatic coating composition were mixed to prepare a thermosetting antistatic coating composition.

< Manufacturing example  6> Preparation of thermosetting antistatic coating composition

2 wt% of carbon nanotubes (multilayer carbon nanotubes, nanohub), 5 wt% of acrylic-urethane copolymer binder (Stahl Asia Pte Ltd., WF-4644), 39.5 wt% of water, 53 wt% of isopropyl alcohol, And 0.5% by weight of silicone (based on silicon) were mixed to prepare a thermosetting antistatic coating composition.

< Manufacturing example  7> Preparation of photocurable antistatic coating composition

10 wt% of an acrylic monomer (Dipentaerythritol hexaacrylate), 15 wt% of a conductive polymer (PEDOT, Agfa), 1 wt% of a photo initiator (Igacure 184, Ciba Geigy Co.), 0.2 wt% of a slip agent (Tego glide 450, Tego Co.) , 0.5 wt% of an ultraviolet stabilizer (BYK-307, BYK Co.), 0.3 wt% of an ultraviolet absorber (Tinubin 3270, Ciba Geigy Co.), 50 wt% of isopropyl alcohol and 23 wt% of methylcellosolve, An antistatic coating composition was prepared.

< Manufacturing example  8> Preparation of photocurable antistatic coating composition

10 weight% of acrylic monomer (Dipentaerythritol hexaacrylate), 10 weight% of carbon nanotubes (multiwall, nanosil), 1 weight% of photo initiator (Igacure 184, Ciba Geigy Co.), slip agent (Tego glide 450, Tego Co.) 0.5 wt% of ultraviolet light stabilizer (BYK-307, BYK Co.), 0.3 wt% of ultraviolet absorber (Tinubin 3270, Ciba Geigy Co.), 50 wt% of isopropyl alcohol and 28 wt% of methyl cellosolve To prepare a photocurable antistatic coating composition.

<Antistatic Prevention Multi-layer  Production of Film>

< Manufacturing example  9> Antistatic Multi-layer  Production of film

The antistatic coating solution prepared in Preparation Example 5 was applied to a nylon surface in a multi-layer nylon (15 탆) / HDPE (25 탆) film (total thickness 40 탆) (15 占 퐉) / HDPE (25 占 퐉) film (total thickness: 40 占 퐉).

< Manufacturing example  10> Prevention of electrification Multi-layer  Film manufacturing

The antistatic coating solution prepared in Preparation Example 7 was applied on a nylon surface in a multilayer nylon (15 占 퐉) / HDPE (25 占 퐉) film (total thickness 40 占 퐉) (15 占 퐉) / HDPE (25 占 퐉) film (total thickness: 40 占 퐉) was prepared by drying at 120 占 폚 and curing by photocuring between 80 and 120 W by photocuring.

&Lt; Preparation of antistatic foam sheet >

< Example  1> Inner shape  Manufacture of anti-static foam sheet

(15 μm) / HDPE (25 μm) film (total thickness: 40 μm) prepared in Production Example 3 was laminated on both sides of a 1.0 mm PE foamed foaming material produced in a non-crosslinked form by extrusion laminating, Resistant foam sheet.

< Example  2> Inner shape  Antistatic foam Nifty  Produce

The coating type antistatic nylon (15 占 퐉) / HDPE (25 占 퐉) film (total thickness 40 占 퐉) prepared in Production Example 4 was laminated on both sides of a 1.0 mm PE foamed foaming material prepared in a non-crosslinked form by extrusion lamination, Resistant foam sheet.

< Example  3> Coated type  Manufacture of anti-static foam sheet

The coating type antistatic nylon (15 占 퐉) / HDPE (25 占 퐉) film (total thickness 40 占 퐉) prepared in Production Example 9 was laminated on both sides of a 1.0 mm PE foamed foaming material prepared in a non-crosslinked form by extrusion lamination, Resistant foam sheet.

< Example  4> Coated type  Manufacture of anti-static foam sheet

The coating type antistatic nylon (15 占 퐉) / HDPE (25 占 퐉) film (total thickness 40 占 퐉) prepared in Preparation Example 10 was laminated on both sides of a 1.0 mm PE foamed foam material prepared in the uncrosslinked form through extrusion lamination An antistatic foam sheet was prepared.

< Comparative Example  1> Coated type  Manufacture of anti-static foam sheet

The thermosetting antistatic composition prepared in Preparation Example 5 was dried on the surface of the HDPE film laminated on both sides of the non-crosslinked 1 mm PE foam material by extrusion lamination using a micro gravure coating method at a temperature of 50 to 70 ° C for 1 to 2 minutes An antistatic layer was formed by heat curing to prepare an antistatic foam sheet.

< Comparative Example  2> Coated type  Manufacture of anti-static foam sheet

The photocurable antistatic composition prepared in Preparation Example 7 was coated on the both sides of the HDPE film surface coated with extrusion lamination on both sides of the non-cross-linked 1 mm PE foam material using a micro-gravure coating method to a thickness of 0.8 탆, And dried at a temperature of ~ 70 ° C for 1 to 2 minutes to completely remove the organic solvent in the composition. Then, an ultraviolet ray of 500 mJ / cm 3 was irradiated and cured to form an antistatic layer to form an antistatic foam sheet.

< Comparative Example  3> Inner shape  Manufacture of anti-static foam sheet

An antistatic foam sheet was prepared by laminating 25 um HDPE film containing 4 to 10 wt% of carbon nanotubes with an electrification agent on both sides of a 1 mm PE foamed foam material prepared in a non-crosslinked form through extrusion lamination.

< Comparative Example  4> Surfactant type  An antistatic foam sheet comprising an antistatic agent

10% by weight of a quaternary ammonium antistatic agent (Superfloc C-591) as a surfactant type, 6% by weight of an acryl-urethane copolymer binder (Stahl Asia Pte Ltd., WF- 4644), 30% by weight of water, 50% by weight of isopropyl alcohol 3% by weight of 1-methyl-2-pyrrolidinone, and 1% by weight of a slip agent were mixed to prepare an antistatic conductive coating solution. The above antistatic surfactant-type coating solution was coated on a 1 mm PE foam material prepared by gravure coating method with a thickness of 0.5 탆 (dried and dried film) and thermally cured at 60-80 캜 for 2 minutes to prepare an antistatic foam sheet Respectively.

< Comparative Example  5> An antistatic foam sheet having antistatic property on the foam itself

A quaternary ammonium antistatic agent, which is a surfactant type, was mixed with LDPE resin and foamed to prepare a 1mm foam sheet for prevention of electrification, and then used as an antistatic foam sheet.

< Experimental Example  1> Measurement of surface resistance

The antistatic foam sheets prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were measured for surface resistance under conditions of 55% RH, 23 ° C, and an applied voltage of 100 to 500 V according to ASTM D257 measurement method. The results are shown in Table 1 below.

< Experimental Example  2> Constant temperature / Humidity  Post surface resistance test

The antistatic foam sheets prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were allowed to stand for 72 hours in a temperature and humidity chamber at a temperature of 70 ° C and a humidity of 90%, and then the surface resistance was measured. The results are shown in Table 1 below.

< Experimental Example  3> Surface Transition Experiment

After the antistatic foam sheets prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were adhered to the surface of the glass, the glass surface was allowed to stand for 72 hours in a temperature and humidity chamber at a temperature of 70 ° C and a humidity of 90% Respectively. The results are shown in Table 1 below.

< Experimental Example  4> Heat resistance / stain test

The antistatic foam sheets prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were allowed to stand for 72 hours in contact with ACF in a temperature and humidity chamber at a temperature of 70 ° C and a humidity of 90% . The results are shown in Table 1 below.

< Experimental Example  5> Surface whitening test

The antistatic foam sheet prepared in each of Examples 1 to 4 and Comparative Examples 1 to 5 was allowed to stand in a roll state for 72 hours in a thermo-hygrostat at a temperature of 70 ° C and a humidity of 90% for 72 hours, The phenomenon was measured. The results are shown in Table 1 below.

< Experimental Example  6> Attachment test

The antistatic foam sheets prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were laminated between the films and left for 72 hours in a constant temperature and humidity bath at a temperature of 70 DEG C and a humidity of 90% And the sticking phenomenon was measured. The results are shown in Table 1 below.

Example Comparative Example One 2 3 4 One 2 3 4 5 Surface resistance
(Ω / cm 2) 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁸ 10 ⁹ After constant temperature and humidity
Surface resistance (Ω / ㎠) 10 ⁷ 10 ⁷ 10 ⁷ 10 ⁷ 10 ⁸ 10 ⁸ 10 ⁷ 10 ¹² 10 ¹³ Surface transition none none none none has exist has exist has exist has exist has exist Stain none none none none has exist has exist has exist has exist has exist Surface whitening phenomenon none none none none has exist has exist has exist has exist has exist Adhesion none none none none has exist has exist has exist has exist has exist Moisture-proof phenomenon has exist has exist has exist has exist none none none none none

As shown in Table 1, the antistatic foam sheet formed of a multilayer laminated with Nylon, polyester, and polypropylene films excellent in moisture resistance and heat resistance and polyethylene (PE) excellent in adhesion strength, PE) film or foamed foams, it was found that the surface resistance was excellent and the surface resistance was almost not changed after the constant temperature and humidity.

In addition, it has been confirmed that there is no phenomenon of sticking to ACF, surface smear, surface smear, surface whitening, which is a cause of defects due to adhesion and transfer due to ACF at the time of transferring the display glass or cell, . In addition, since nylon having excellent moisture resistance is laminated, it can be seen that there is no whitening due to the surface of the foam due to moisture.

Therefore, in the present invention, there is laminated on at least one surface of a multilayered film of nylon, polyester, and polypropylene films excellent in surface electrification, moisture resistance, and heat resistance and polyethylene (PE) The structure in which the antistatic layer is formed on the film surface with excellent moisture proofing and heat resistance and the PE film and the nonwoven fabric which are excellent in adhesion are laminated on the ACF (Anisotropic Conductive Film) surface or the glass surface It is expected that there will be no sticking phenomenon due to the rise of ambient temperature and no foreign matter metastasis, and that the display glass can be protected from shock and moisture and the occurrence of surface scratches can be minimized.

Claims (8)

A base sheet; And
And an antistatic film formed on at least one side of the substrate sheet,
Wherein the antistatic film is composed of a multilayer laminated with a nylon film excellent in moisture resistance and heat resistance and a polyethylene film. The method according to claim 1,
The base sheet is a polyolefin-based foam sheet produced by non-crosslinking or chemical crosslinking; Polyurethane foam sheet; Or an ethylene vinyl acetate (EVA) foam sheet produced by pressure crosslinking. delete The method according to claim 1,
Wherein said polyethylene film is selected from high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and medium density polyethylene (MDPE). The method according to claim 1,
Wherein the antistatic film comprises a coating layer coated with an antistatic coating composition comprising an antistatic agent or an antistatic agent. 6. The method of claim 5,
The antistatic coating composition comprises
0.1 to 30 wt% of at least one selected from conductive polymers, graphene, and carbon nanotubes; 2 to 35% by weight of a thermosetting binder; 10 to 40% by weight of water; 20 to 75% by weight of an organic solvent; And 0.1 to 5% by weight of at least one additive selected from an anti-blocking agent, a slip agent, a wetting agent and a UV stabilizer; or,
0.1 to 30% by weight of at least one selected from the group consisting of a conductive polymer, a graphene and a carbon nanotube; 5 to 40% by weight of a photocurable binder; 0.1 to 5% by weight of a photoinitiator; From 40 to 75% by weight of an organic solvent; And 0.1 to 5% by weight of at least one additive selected from the group consisting of anti-blocking agents, slip agents, wetting agents and ultraviolet stabilizers. 6. The method of claim 5,
Wherein the antistatic film comprises 1 to 60% by weight of an anti-static antistatic composition. 8. The method of claim 7,
The anti-static antistatic composition comprises 0.1 to 50% by weight of at least one selected from graphene, carbon nanotube and carbon; 0.1 to 5% by weight of an additive selected from the group consisting of a heat stabilizer, a plasticizer, a UV stabilizer and a dispersant, or a mixture thereof, and 45 to 98% by weight of a polymer resin as a base material.

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