JPH09165555A - Coating agent for antistatic polymer film and production of the film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coating agent for antistatic polymer films capable of improving the sliding property of the polymer films and to provide a method for producing the film. SOLUTION: This coating agent 10 is obtained by blending an electron beam curing resin 12, a surfactant 14 and beads 16, and is applied to the surface of a polymer film 2. As the beads 16, a filler made of an inorganic-based, an acrylic or fluorine-based material and having 0.5-10μm mean particle diameter is used. By irradiating the electron beam to the surface of the coating agent 10 applied on the surface of the polymer film 2, a polymer is formed therefrom by the development of a polymerization and a cross-linking reaction, and as a result, a cured membrane of the coating agent 10 for imparting an antistatic effect and smoothness to the polymer film 2, is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating agent for an antistatic polymer film and an antistatic polymer film for preventing electrification of a polymer film used as a packaging material for packaging electronic device parts, powders and the like. The present invention relates to a manufacturing method.

[0002]

2. Description of the Related Art Generally, plastic products have 10 ¹⁴ Ω /
□ It has the above surface resistance and tends to be charged with static electricity on the surface. Therefore, for example, when a polymer film is used as a packaging material for packaging electronic device parts such as ICs or powder, the electronic device parts are destroyed by static electricity, or dust or dirt adheres to the surface. Then, there arises a problem that workability is poor. As a countermeasure against this, a layer of an antistatic agent is generally formed on the surface of such a polymer film. As a method of forming the antistatic agent layer, there are a kneading method and a coating method. In either method, the surface of the polymer film is provided with a certain degree of conductivity to prevent charging.

[0003]

However, the polymer film which has been subjected to the antistatic treatment has a problem that the surface slipperiness is poor. For this reason, for example, when a polymer film is processed into a packaging material, after the polymer film is subjected to antistatic treatment, the polymer film is no longer mechanically automatically moved to the next step of processing into a packaging material. It is difficult to do so, and conventionally, such work has been performed manually.

The present invention has been made under the above circumstances, and provides a coating agent for an antistatic polymer film and a method for producing an antistatic polymer film, which can improve the slipperiness of the surface of the polymer film. That is the purpose.

[0005]

The coating agent for an antistatic polymer film according to the present invention for achieving the above object comprises an electron beam curing resin, a surfactant and beads. It is a feature. In the coating agent for an antistatic polymer film according to the invention of claim 2, in the invention of claim 1, the electron beam curing resin has at least two acryloyl groups in a molecule and has a hydroxy group. A non-crosslinkable compound and a compatible compound having at least one acryloyl group and at least one hydroxy group in the molecule, wherein the surfactant is a quaternary compound having at least one acryloyl group in the molecule. It is characterized by being an ammonium salt compound.

The coating agent for an antistatic polymer film according to a third aspect of the present invention is the coating agent for an antistatic polymer film according to the second aspect, wherein an acryloyl group is contained in 1 mol of the mixture of the electron beam curing resin and the surfactant. The amount is 1.3
mol-2.6 mol, the content of hydroxy groups is 0.2
It is characterized in that the contents of mol to 2.8 mol and the quaternary ammonium salt are 0.03 mol to 0.4 mol.

The coating agent for an antistatic polymer film according to a fourth aspect of the present invention is the coating agent according to the first to third aspects, wherein the beads have an average particle size of 0.5 μm to 5 μm.
The acrylic filler of m, characterized in that the beads are added to the electron beam curable resin and the surfactant in an amount of 2% by weight to 5% by weight. In the coating agent for an antistatic polymer film according to the invention of claim 5, in the invention of claims 1 to 3, the beads are an inorganic, acrylic or fluorine-based filler having an average particle size of 3 μm to 10 μm. The beads are added to the electron beam curable resin and the surfactant in an amount of 10% by weight to 20% by weight.

A method for producing an antistatic polymer film according to a sixth aspect of the present invention for achieving the above object comprises the antistatic polymer film coating agent according to any one of the first to fifth aspects, After coating on the surface of the polymer film, the surface of the coating agent is irradiated with an electron beam to form a cured coating film of the coating agent.

A coating agent containing an electron beam curing resin, a surfactant and beads is applied to the surface of a polymer film, and then the surface of the coating agent is irradiated with an electron beam to form a cured coating film of the coating agent. As a result, an antistatic effect can be imparted to the polymer film, and the slipperiness of the surface of the cured film can be improved.
Here, the beads are spherical fillers used to improve the slipperiness of the surface of the cured coating. As the material of the beads, it is desirable to use an inorganic type, an acrylic type or a fluorine type. The average particle size of the beads is 0.
The thickness is preferably 5 μm to 10 μm. In particular, in the case of producing a clear type polymer film that requires transparency, an acrylic filler having an average particle size of 0.5 μm to 5 μm is used as beads and the beads are used as an electron beam curing resin and a surfactant. Add 5% to 5% by weight. On the other hand, in the case of producing a matte type polymer film, an inorganic, acrylic or fluorine-based filler having an average particle size of 3 μm to 10 μm is used as beads, and the beads are used as an electron beam curing resin and a surfactant at 10% by weight. Add ~ 20% by weight.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining a method for producing an antistatic polymer film using a coating agent for an antistatic polymer film according to an embodiment of the present invention, and FIG. 2 is a method for producing the antistatic polymer film. FIG. 3 is a schematic configuration diagram of an electron beam irradiation apparatus used in FIG. 3, and FIG. 3 is a schematic circuit diagram of an electron beam generation unit of the electron beam irradiation apparatus.

In this embodiment, the case where the base material imparting the antistatic effect is a polymer film will be considered. For such a polymer film, for example, polymethylmethacrylate, polycarbonate, polystyrene, polypropylene, polyvinyl chloride, polyethylene, polyester, etc. are used. The thickness of the base polymer film can be appropriately selected according to the product to be used, but is 5 μm to 3 μm.
It is preferably in the range of 00 μm, and particularly in the case of using a soft material such as polyethylene or polyvinyl chloride, it is preferably in the range of 20 μm to 200 μm.

The antistatic polymer film coating agent of the present embodiment is obtained by adding beads to a mixture of an electron beam curing resin and a surfactant. The main component of the electron beam curing resin is a crosslinkable compound and a compatible compound. Here, as the crosslinkable compound, an acrylic or methacrylic compound is used. In particular, it is desirable to use a crosslinkable compound having at least two, preferably two to six acryloyl groups in the molecule and having no hydroxy group. When such a crosslinkable compound is irradiated with an electron beam, radicals are generated to form a polymer. As the compatible compound, at least one in the molecule,
Those having 1 to 4 acryloyl groups and at least 1, preferably 1 to 3 hydroxy groups are preferably used. The compatible compound is a compound that compatibilizes the cross-linkable compound and the surfactant, which are generally immiscible with each other. Further, as the surfactant, a cationic type such as a quaternary ammonium salt or an anionic type such as an alkyl sulfate is used. In particular, it is desirable to use a quaternary ammonium salt compound having at least one, preferably one or two acryloyl groups in the molecule. Such a surfactant is used as an antistatic agent that imparts a certain degree of conductivity to the surface of the polymer film to prevent charging.

The beads are small spheres that are put as a filler in a mixture of an electron beam curing resin and a surfactant, and have good slipperiness on the surface of the cured coating of the coating agent applied to the polymer film. It is used to As the material of the beads, an inorganic type, an acrylic type or a fluorine type is used. The average particle size of the beads is 0.5.
The one having a size of μm to 10 μm is used. In particular, when producing a so-called clear type polymer film that requires transparency, the beads have an average particle size of 0.5 μm to 5 μm.
Using an acrylic filler of μm, the beads are used in an electron beam curing resin and a surfactant in an amount of 2% by weight to 5% by weight, preferably 3%.
It is desirable to add from 4% to 4% by weight. If the average particle size of the beads is less than 0.5 μm or the amount of the beads added is less than 2% by weight, the slipperiness of the surface becomes poor, while the average particle size of the beads is more than 5 μm, or This is because if the addition amount is more than 5% by weight, the haze value becomes high and the transparency is not satisfied. Further, in the case of producing a so-called matte type polymer film that does not require transparency, the beads are not limited to acrylic fillers, but inorganic or fluorine fillers can be used. In this case, beads having an average particle size of 3 μm to 10 μm are used, and the beads are used in an electron beam curing resin and a surfactant in an amount of 10% by weight to 20%.
Addition by weight% is desirable. The average particle size of the beads is 3
If it is less than μm or the amount of beads added is less than 10% by weight, the surface gloss cannot be sufficiently erased,
On the other hand, the average particle size of the beads is larger than 10 μm,
Alternatively, if the amount of the beads added is more than 20% by weight, the viscosity of the coating agent increases, which causes a problem in workability in gravure coating, for example.

In order to produce an antistatic polymer film using the coating agent for an antistatic polymer film of this embodiment, first, as shown in FIG. 1 (a), the electron beam curing resin 12 and the surfactant are used. The coating agent 10 in which 14 and beads 16 are mixed is applied to the surface of the polymer film 2. Here, in FIG. 1, the surfactant 14 is drawn as if it exists as a solid substance in the electron beam curable resin 12, but in reality, the surfactant 14 is the electron beam curable resin 12.
It blends well in. In addition, the coating agent 10
As a method of applying, a gravure coating method, a Mayer rod method, a curtain coating method, or the like can be used.

Next, as shown in FIG. 1B, the surface of the coating agent 10 applied to the polymer film 2 is irradiated with an electron beam. Then, radicals are generated, whereby a polymerization reaction or a crosslinking reaction of the crosslinkable compound and / or the compatible compound occurs to form a polymer. As a result, a cured film of the coating agent 10 is obtained. Here, the thickness of the cured film of the applied coating agent 10 is 1 μm to
The range is preferably 50 μm. In particular, the lower limit of the film thickness of the cured film is preferably set to 1.5 μm in order to ensure the surface durability and the transparency of the clear type polymer film. The upper limit of the film thickness is 20 μm in order to prevent a large warp in the polymer film due to the cured film.
It is desirable that Further, the dose of the electron beam applied to the surface of the coating agent 10 is 10 kGy to 150 kG.
The range of y is preferable, and 20 kGy to 10 is particularly preferable.
It is desirable to set it in the range of 0 kGy. As described above, the method for producing the antistatic polymer film of the present embodiment is completed, and the polymer film 2 is provided with the antistatic effect and the slipperiness. In particular, the polymer film 2 obtained by such a treatment is characterized in that it has a non-sticky surface and has a semi-permanent antistatic effect.

As a mixture of the electron beam curing resin and the surfactant, a crosslinkable compound having at least two acryloyl groups in the molecule and not having a hydroxy group, at least one acryloyl group in the molecule, and When a mixture of a compatible compound having at least one hydroxy group and a quaternary ammonium salt compound having at least one acryloyl group in the molecule is used, the content of the acryloyl group in 1 mol of the mixture is 1.
3 mol to 2.6 mol, the content of hydroxy groups is 0.
The content of 2 mol to 2.8 mol and the quaternary ammonium salt is preferably 0.03 mol to 0.4 mol. As a result, the surface hardness of the coating agent can be improved and a sufficient antistatic effect can be imparted to the polymer film.

Next, the electron beam irradiation apparatus used in the method of this embodiment will be described. Such an electron beam irradiation device,
It is used for polymerization or cross-linking treatment on the surface of the object to be treated, and as shown in FIG. 2, it is provided with an electron beam generator 50, an irradiation chamber 60, and an irradiation window 70. Electron beam generator 5
Reference numeral 0 has a terminal 52 for generating an electron beam and an accelerating tube 54 for accelerating the electron beam generated at the terminal 52 in a vacuum space (acceleration space). In addition, in order to prevent electrons from colliding with gas molecules to lose energy and to prevent oxidation of the filament 52a, the inside of the electron beam generator 50 is 1.3 × 1 by a pump or the like not shown.
The vacuum is maintained at 0 ^{−4 to} 1.3 × 10 ⁻⁵ Pa. The terminal 52 is a linear filament 5 that emits thermoelectrons.
2a and a gun structure 52 supporting the filament 52a
b and a grid 52c for controlling thermoelectrons generated in the filament 52a.

Further, as shown in FIG. 3, the electron beam generator 5
0 is a heating power source 56a for heating the filament 52a to generate thermoelectrons, a control DC power source 56b for applying a voltage between the filament 52a and the grid 52c, a grid 52c and an irradiation window portion 70. A DC power source 56c for acceleration that applies a voltage (acceleration voltage) is provided between the window foil 72 and the window foil 72.

The irradiation chamber 60 includes an irradiation space 62 for irradiating an object with an electron beam. Further, the object to be processed is moved in the irradiation chamber 60 from the left side to the right side in FIG. 2 by a conveying means (not shown) using rollers or the like. The periphery of the electron beam generator 50 and the irradiation chamber 60 is lead-shielded so that X-rays that are secondarily generated during electron beam irradiation do not leak outside.

The irradiation window portion 70 is a window foil 72 made of metal foil.
And a window frame structure 74 that supports the window foil 72 while cooling the window foil 72. The window foil 72 separates the vacuum atmosphere in the electron beam generating unit 50 from the irradiation atmosphere in the irradiation chamber 60, and the irradiation chamber 6 is separated by the window foil 72.
The electron beam is taken out within 0. As the metal used for the window foil 72, Ti foil having a thickness of about 10 μm is most often used.

The filament 52 is heated by the heating power source 56a.
When the filament 52a is heated by applying a current to a, the filament 52a emits thermoelectrons, and the thermoelectrons are attracted in all directions by the control voltage of the control DC power supply 56b applied between the filament 52a and the grid 52c. this house,
Only those that have passed through the grid 52c are effectively taken out as electron beams. The electron beam extracted from the grid 52c is accelerated in the acceleration space in the accelerating tube 54 by the acceleration voltage of the accelerating DC power supply 56c applied between the grid 52c and the window foil 72, and then the window foil. The object to be processed which passes through 72 and is conveyed in the irradiation chamber 60 below the irradiation window 70 is irradiated. The beam current is usually adjusted by setting the heating power supply 56a and the acceleration DC power supply 56c to predetermined values and making the control DC power supply 56b variable. In general, in an electron beam irradiation apparatus, the dose absorbed by an object to be processed is proportional to the beam current. For this reason,
The absorbed dose of the electron beam can be adjusted by changing the beam current.

When such an electron beam irradiation apparatus is used in the method for producing the antistatic polymer film of this embodiment, it is generally preferable to set the acceleration voltage to a value within the range of 100 kV to 500 kV. . In particular, when the polymer film is one that is easily deteriorated by an electron beam such as polycarbonate or polypropylene, it is desirable to set the acceleration voltage to a value within the range of 100 kV to 150 kV. Further, in the case of performing the surface treatment as in the present embodiment, if a large amount of oxygen exists around the object to be treated, the radicals generated by irradiating the electron beam react with oxygen and the radicals are generated. The polymerization reaction is hindered. Therefore, the irradiation atmosphere in the irradiation chamber 60 is a nitrogen atmosphere. Specifically, the oxygen concentration in the irradiation atmosphere is 1000 pp
It is preferably m or less, and particularly preferably 500 ppm or less.

Next, the inventors of the present invention have described the antistatic effect and the clear type polymer film and the matte type polymer film which have been treated by the method for producing an antistatic polymer film according to the present embodiment. A test for confirming slipperiness and the like was conducted. First, a test was conducted on a clear type polymer film. In this test, a polyester film (PET) was used as the polymer film. The thickness of this polymer film is 50 μm. The following four types of coating agents were mixed and used. That is, pentaerythritol triacrylate (PE3A) as a crosslinkable compound, 2-hydroxypropyl acrylate (HPA) as a compatible compound, dimethylaminoethyl acrylate, a quaternary salt (DMAEAQ) as a surfactant, and acrylic A mixture of methacrylic resin (MMA) as the system beads was used. Here, the beads have an average particle size of 1.0 μm, 1.5 μm, 3.5 μm, 5.0 μm.
m. Then, beads having each average particle diameter are added at a ratio of 3 to 4% by weight to a mixture of 50 parts of a crosslinkable compound, 30 parts of a compatible compound and 20 parts of a surfactant, and four kinds of coating agents are added. Was produced. next,
Each coating agent was applied to three polymer films with a gravure coater to a thickness of 1.5 μm, 3.0 μm, and 6.0, respectively.
It was applied to a thickness of μm. Then, the accelerating voltage of the electron beam irradiation device was set to 150 kV, and the surface of the applied coating agent was irradiated with an electron beam at a dose of 30 kGy to form a cured coating film of the coating agent. here,
CB250 / manufactured by Iwasaki Electric Co., Ltd.
15/180 L was used. The following tests were carried out using the samples thus obtained.

First, the present inventors investigated the antistatic effect of each sample. In the test for examining the antistatic effect, the surface resistance value was measured for each sample obtained by the above method. Here, the surface resistance value was measured using Hiresta HT-210 manufactured by Mitsubishi Petrochemical Co., Ltd. Also, the environment at the time of measurement is temperature 25 ° C, humidity 60% R
H. Generally, in order to prevent the film from being charged, the surface resistance value needs to be 10 ¹² Ω / □ or less.
As a result of the test for examining the antistatic effect, the surface resistance value of all the samples was about 3 × 10 ¹⁰ Ω / □ regardless of the average particle diameter of the beads and the film thickness of the coating agent. Therefore, it was confirmed that the polymer film treated by the method of the present embodiment has a sufficient antistatic effect.

Next, the present inventors examined the slidability and haze value (haze) of the surface of the cured coating for each sample. The result is shown in FIG. Here, the slidability and the haze value (haze) were evaluated in four stages. That is, very good (indicated by double circles), good (indicated by circles),
There are four levels: those that fall a little but practically no problem (indicated by triangles) and those that are poor (indicated by x). Regarding the slipperiness, as shown in the upper part of FIG. 4, it was confirmed that all the samples prepared here had the slipperiness which was practically no problem. From these results, it can be seen that the slipperiness becomes better as the average particle diameter of the beads becomes larger than the film thickness of the coating agent. On the other hand, regarding the haze value, as shown in the lower part of FIG. 4, a sample having an average particle diameter of beads of 3.5 μm and a film thickness of 1.5 μm, and an average particle diameter of beads of 5.0 μm and a film thickness of 1. The sample of 5 μm, the sample having an average particle diameter of beads of 5.0 μm and the film thickness of 3.0 μm had a high haze value and was not suitable as a clear type film, but for other samples, It was confirmed to have a haze value which was practically no problem. Then, the haze value is improved when the average particle size of the beads is smaller than the film thickness of the coating agent. Summarizing the results regarding the slipperiness and the haze value, the slipperiness and the haze value are related to the average particle diameter of the beads and the film thickness of the coating agent,
In particular, it is understood that the average particle diameter of the beads should be set to the same level as or smaller than the film thickness of the coating agent in order to give the polymer film slipperiness and haze value which are practically unproblematic.

Next, a test was conducted on a matte type polymer film. In this test, a polyester film (PET) was used as the polymer film. The thickness of this polymer film is 50 μm. The following four types of coating agents were mixed and used. That is, pentaerythritol triacrylate (PE3A) as a crosslinkable compound, an acrylic acid adduct of polyethylene glycol diglycyl ether (EP400EA) as a compatible compound, dimethylaminoethyl acrylate as a surfactant, and a quaternary salt ( A mixture of DMAEAQ) and methacrylic resin (MMA) as acrylic beads was used.
Here, as the beads, those having a predetermined average particle size in the range of 0.5 μm to 20 μm were used. Then, the beads having each average particle diameter are added at a predetermined ratio within a range of 5% by weight to 50% by weight to a mixture of 50 parts of the crosslinkable compound, 30 parts of the compatible compound and 20 parts of the surfactant. , Various coating agents were prepared. Next, each coating agent was applied to the polymer film with a gravure coater so as to have a predetermined thickness. Then, by setting the acceleration voltage of the electron beam irradiation device to 150 kV and irradiating the surface of the applied coating agent with an electron beam at a dose of 30 kGy,
A cured film of the coating agent was formed. Here, as an electron beam irradiation device, CB250 / 15 / manufactured by Iwasaki Electric Co., Ltd.
180 L was used. The following tests were carried out using the samples thus obtained.

First, the present inventors investigated the antistatic effect of each sample. In the test for examining the antistatic effect, the surface resistance value of each sample was measured in the same manner as the test performed for the clear type polymer film described above. As a result, it was confirmed that all the samples had a sufficient antistatic effect. Next, the present inventors examined the slipperiness and matteness of the surface of the cured coating for each sample. With respect to the slipperiness, it was confirmed that all the samples prepared here had slipperiness which was practically no problem. On the other hand, with respect to the matte property, good matte property was not obtained for each sample having an average particle diameter of beads smaller than 3.0 μm and each sample having the bead addition amount less than 10% by weight, and the bead For each sample having an average particle size of more than 10.0 μm and each of the beads added in an amount of more than 20% by weight,
There was a working problem that gravure coating, especially thin film coating of several μm, could not be performed easily. However, the other samples, that is, the samples in which the average particle diameter of the beads is in the range of 3.0 μm to 10.0 μm and the amount of the beads added is in the range of 10% by weight to 20% by weight, have good matte properties. It was confirmed to have a tone.

The antistatic polymer film coating agent of the present embodiment is a mixture of an electron beam curable resin and a surface-active agent to which beads are added. After applying to the surface, by irradiating the surface of the coating agent with an electron beam to form a cured coating film of the coating agent, it is possible to impart an antistatic effect to the polymer film,
The slipperiness of the surface of the cured film can be improved. Therefore, the polymer film obtained by such treatment is slippery, and therefore, for example, when the polymer film is processed into a packaging material, even after the polymer film is subjected to the antistatic treatment, the polymer film is mechanically treated. There is an advantage that it can automatically move to the next packaging material processing step.

[0029]

EXAMPLES First, the following Examples 1-1, 1-2, 1-3
An example of producing the coating agent for an antistatic polymer film of the present invention is shown in FIG. Example 1-1 50 g of pentaerythritol triacrylate (PE3A) as an electron beam curing resin, dimethylaminoethyl acrylate and a quaternary salt (DMAEA) as a surfactant.
20 g of Q), 30 g of 2-hydroxypropyl acrylate (HPA) as a compatible compound, and 3.5 g of methacrylic resin (MMA) beads having an average particle diameter of 3.5 μm.
And were mixed to prepare a coating agent.

Example 1-2 50 g of pentaerythritol triacrylate (PE3A) as an electron beam curing resin, dimethylaminoethyl acrylate as a surfactant, and a quaternary salt (DMAEA).
20 g of Q), 30 g of 2-hydroxypropyl acrylate (HPA) as a compatible compound, and an average particle size of 5
A coating agent was prepared by mixing with 3.5 g of methacrylic resin (MMA) beads having a diameter of μm.

Example 1-3 50 g of pentaerythritol triacrylate (PE3A) as an electron beam curing resin, dimethylaminoethyl acrylate as a surfactant, and a quaternary salt (DMAEA).
20 g of Q) and an acrylic acid adduct of polyethylene glycol diglycyl ether as a compatible compound (EP
A coating agent was prepared by mixing 30 g of 400 EA) with 15 g of methacrylic resin (MMA) beads having an average particle size of 5 μm.

Example 2 Next, the three types of coating agents prepared in Examples 1-1 to 1-3 were applied to three polyesters (PE) having a thickness of 50 μm.
T) Using a gravure coater, each film was applied to a thickness of 3.0 μm. After that, electron beam irradiation device (CB250 / 15 / 180L manufactured by Iwasaki Electric Co., Ltd.)
Was used, the acceleration voltage was set to 150 kV, and the surface of the applied coating agent was irradiated with an electron beam at a dose of 30 kGy. All coating agents formed a cured film by electron beam irradiation.

For each of the samples thus obtained, a Hiresta HT-210 manufactured by Mitsubishi Petrochemical Co., Ltd.
The surface resistance value was measured at a temperature of 60 ° C. and a humidity of 60% RH. As a result, the surface resistance of all samples was about 3 × 1
It was 0 ¹⁰ Ω / □, and it was confirmed to have a sufficient antistatic effect. The present invention is not limited to the above-described embodiments and examples, and various modifications can be made within the scope of the gist thereof.

[0034]

As described above, according to the present invention, by containing an electron beam curable resin, a surfactant and beads, the polymer film is coated on the surface and then the surface is irradiated with an electron beam. By forming a cured coating by using the above method, it is possible to provide a coating agent for an antistatic polymer film, which can impart an antistatic effect to a polymer film and can improve the slipperiness of the surface of the cured coating. it can.

As described above, according to the present invention, a coating agent containing an electron beam curing resin, a surfactant and beads is applied to the surface of a polymer film, and then an electron beam is applied to the surface of the coating agent. A method for producing an antistatic polymer film capable of imparting an antistatic effect to a polymer film and improving the slipperiness of the surface of the cured film by forming a cured coating film of a coating agent by irradiation. Can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a method for producing an antistatic polymer film using a coating agent for an antistatic polymer film according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an electron beam irradiation apparatus used in the method for producing the antistatic polymer film.

FIG. 3 is a schematic circuit diagram of an electron beam generator of the electron beam irradiation device.

FIG. 4 is a diagram showing the results of tests on the slipperiness and the haze value of a clear type film that has been treated by the method for producing an antistatic polymer film according to the present embodiment.

[Explanation of symbols]

 2 Polymer Film 10 Coating Agent 12 Electron Beam Curing Resin 14 Surfactant 16 Beads

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Naoyuki Amaya No. 202, Famir Nishimon 8 Nishimon, Taketoyo-cho, Chita-gun, Aichi (72) Inventor Shinobu Kinoshita 1-1 Ichiriyama-cho, Gyoda-shi, Saitama Iwasaki Electric Saitama Co., Ltd. (72) Inventor Yasuo Yoshida 1-30-10 Fujiwara-cho, Gyoda-shi, Saitama I-Electron Beam Co., Ltd.

Claims (6)

[Claims] 1. A coating agent for an antistatic polymer film, which comprises an electron beam curing resin, a surfactant and beads. 2. The electron beam curable resin comprises a crosslinkable compound having at least two acryloyl groups in a molecule and no hydroxy group, and at least one acryloyl group and at least one hydroxy group in a molecule. 2. The antistatic polymer film according to claim 1, wherein the surfactant is a quaternary ammonium salt compound having at least one acryloyl group in the molecule. Coating agent. 3. The acryloyl group content is 1.3 mol to 2.6 mol, and the hydroxy group content is 0.2 mol to 2.8 mol in 1 mol of the mixture of the electron beam curing resin and the surfactant. The coating agent for an antistatic polymer film according to claim 2, wherein the content of the quaternary ammonium salt is 0.03 mol to 0.4 mol. 4. The beads have an average particle size of 0.5 μm to 5 μm.
A coating for an antistatic polymer film according to any one of claims 1 to 3, wherein the coating is an acrylic filler having a thickness of μm, and the beads are added to the electron beam curing resin and the surfactant in an amount of 2% by weight to 5% by weight. Agent. 5. The beads have an average particle size of 3 μm to 10 μm.
m of an inorganic, acrylic or fluorine filler, and the beads are added to the electron beam curable resin and the surfactant.
The coating agent for an antistatic polymer film according to claim 1, which is added in an amount of 0% by weight to 20% by weight. 6. The coating agent for an antistatic polymer film according to claim 1 is applied to the surface of a polymer film, and then the surface of the coating agent is irradiated with an electron beam to perform the coating. A method for producing an antistatic polymer film, which comprises forming a cured film of an agent.