KR20170096881A - Anti-static silicone tight-release coating film - Google Patents
Anti-static silicone tight-release coating film Download PDFInfo
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- KR20170096881A KR20170096881A KR1020160018706A KR20160018706A KR20170096881A KR 20170096881 A KR20170096881 A KR 20170096881A KR 1020160018706 A KR1020160018706 A KR 1020160018706A KR 20160018706 A KR20160018706 A KR 20160018706A KR 20170096881 A KR20170096881 A KR 20170096881A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C09D7/125—
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/16—Anti-static materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/21—Anti-static
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Abstract
Description
The present invention relates to an antistatic heavy silicone release film having excellent antistatic function and having a stable releasing property due to high adherence of a coating layer to a base material and high degree of crosslinking of a silicone release layer, eliminating adverse effects of electrostatic phenomenon when peeling off from a pressure- .
BACKGROUND ART [0002] With the rapid development of industrialization in the fields of semiconductors, electric, electronic and display, the use of synthetic resin or synthetic fiber in the above-mentioned fields has been rapidly increasing, and the problem of static electricity in the processing process is emerging.
In general, the demand for antistatic function in the release film field used for the function of protecting the pressure-sensitive adhesive layer is steadily increasing. In order to solve problems such as contamination and defective peeling caused by static electricity generated when a release film is separated from a pressure sensitive adhesive layer, an antistatic function is imparted to the pressure sensitive adhesive. However, due to the incompatibility between the antistatic component and the pressure sensitive adhesive component It has been difficult to realize sufficient antistatic performance. Therefore, in recent years, an antistatic function is often imparted to a releasing layer in addition to a pressure-sensitive adhesive.
On the other hand, the releasing properties required for the release film for the precision materials field include peeling force in an appropriate range depending on the kind of the pressure-sensitive adhesive and application, and a high residual adhesion rate so as not to deteriorate the function of the pressure- There is a demand for solvent resistance so that the release layer is not damaged by the organic solvent used in the pressure-sensitive adhesive and high adhesion between the release layer and the substrate so that the release layer is not dropped off by friction in the processing step. Further, since the release film is used also as a pressure-sensitive adhesive carrier film film due to the thinning of the pressure-sensitive adhesive layer, a stable release property with less change with temperature and time should be secured.
Conventional antistatic techniques include an internal addition method using an anionic compound, a method of depositing a metal compound, a method of applying conductive inorganic particles, a method of applying a low molecular weight ionic compound, and a method of applying a conductive polymer , A method of producing an antistatic release film by incorporating a metal in a silicone composition by applying such antistatic technology has been used. However, this method is disadvantageous not only economically but also has a limitation in realizing sufficient antistatic performance, and a uniform coating layer is not formed. In addition, when the antistatic composition uses an ionic compound, the curing reaction of the silicone mold-releasing composition is hindered and stable mold releasability is not ensured, and there is a problem that the adhesion between the antistatic release layer and the substrate is deteriorated, There is a problem that the performance is deteriorated.
Thus, the present inventors have found that an antistatic heavy silicone release film can be obtained by mixing a release power adjusting agent for adjusting the peeling force, a conductive polymer resin having excellent compatibility and a binder mixture having excellent reactivity to a silicone release coating composition for producing a release film, And the present invention has been completed.
DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an antistatic film having excellent antistatic properties through an in-line manufacturing process, The present invention provides an anti-static heavy silicone release film which can reduce side effects such as product contamination due to electrostatic phenomenon during stripping and poor separation.
Another object of the present invention is to provide a pressure sensitive adhesive composition which can be suitably used for applications without deteriorating the performance of the pressure sensitive adhesive layer by having an appropriate range of peeling force and a high level of residual adhesive strength and by forming a dense coating layer, To provide an antistatic heavy silicone release film having solvent resistance to an organic solvent and having a high adhesion force between a coating layer and a substrate and having little change in physical properties depending on temperature and time, and having stable releasing properties.
These and other objects and advantages of the present invention will become more apparent from the following description of a preferred embodiment thereof.
The object is achieved by an antistatic heavy silicone release film comprising a polyester base film and a coating layer applied on at least one side of the polyester base film at least once with an antistatic silicone release composition, Is achieved by an antistatic, heavy silicone release film, characterized in that it comprises an alkenyl polysiloxane, a hydro pre-polysiloxane, a release power modifier, a conductive polymer resin, a binder mixture and a platinum chelate catalyst.
The antistatic silicone mold releasing composition is prepared by mixing 2.5 to 7.5 parts by weight of the hydrolyzed polysiloxane, 20 to 50 parts by weight of the peel strength regulating agent, 1 to 5 parts by weight of the conductive polymer resin with respect to 100 parts by weight of the alkenyl polysiloxane, 5 to 20 parts by weight of the mixture and 10 to 1000 ppm of the platinum chelate catalyst.
Preferably, the binder mixture comprises a silane-based compound and a mesylate-based multifunctional compound.
Preferably, the silane-based compound is at least one compound selected from the group consisting of an epoxy silane compound, an aminosilane compound, a vinyl silane compound, a methacryloxy silane compound and an isocyanate silane compound. The epoxy compound having an epoxy functional group And is a polyfunctional compound.
Preferably, the epoxy-based polyfunctional compound is at least one functional group selected from the group consisting of epoxy, amino, hydroxyl, aldehyde, ester, vinyl, acrylic, imide, cyano and isocyanate groups And has three or more functional groups in one molecule.
Preferably, the weight ratio of the mesylate-based multifunctional compound to the silane-based compound is 2 to 20.
Preferably, the surface tension of the polyester base film relative to the antistatic silicone release type composition is 1.0 to 1.5 times.
Preferably, the conductive polymer resin is an aqueous dispersion containing an aqueous dispersion containing a polyanion and a polythiophene or a polyanion and a polythiophene derivative with an average particle diameter of 10 to 60 nm.
Preferably, the peel strength adjusting agent is an organopolysiloxane resin containing a hydroxyl group.
Preferably, the antistatic silicone mold release composition contains 1 to 10% by weight of solids.
Preferably, the antistatic heavy-release silicone release film has a thickness of 15 to 300 mu m.
Preferably, the coating layer simultaneously satisfies the following formulas 1 to 3,
50? RF? 150 (Equation 1)
90? SA? 100 (Equation 2)
SR ≤ 10 ^ 11 (Equation 3)
Where SA (%) is the residual adhesion of the coating layer, and SR (Ω / sq) is the surface resistance of the coating layer.
According to the present invention, it is possible to solve the problems such as contamination due to static electricity and peeling failure which are caused when the release film is separated from the pressure-sensitive adhesive layer.
Further, by having an appropriate range of peeling force and a high level of residual adhesion, it can be suitably used for the application without deteriorating the function of the pressure-sensitive adhesive layer, and is also excellent in durability of the coating layer, And has a high adhering force with the base material, so that the coating layer is less likely to come off due to friction.
In addition, by forming a dense coating layer, it has such effects as having a stable releasing property with little change with temperature and time.
However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.
1 is a cross-sectional view of a silicon release film comprising an antistatic heavyweight silicone release layer in accordance with an aspect of the present invention.
2 is a cross-sectional view of a silicone release film comprising an antistatic heavyweight silicone release layer according to another aspect of the present invention.
3 is a cross-sectional view of a silicon release film comprising an antistatic heavyweight silicone release layer according to another aspect of the present invention.
Hereinafter, the present invention will be described in detail with reference to embodiments and drawings of the present invention. It will be apparent to those skilled in the art that these embodiments are provided by way of illustration only for the purpose of more particularly illustrating the present invention and that the scope of the present invention is not limited by these embodiments .
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control. Also, although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods and materials are described herein.
1, which is a cross-sectional view of an antistatic heavy-duty silicone release film comprising an antistatic heavy-duty silicone release layer according to an aspect of the present invention, an electrification preventing middle- The heavy duty
The antistatic silicone mold release composition according to the present invention comprises an alkenyl polysiloxane represented by the following formula (1) and a hydrolyzed polysiloxane represented by the following formula (2).
[Chemical Formula 1]
Here, m and n are each independently an integer of 10 to 500. In this case, m and n do not mean block combining, but merely mean that the sum of each unit is m and n. Therefore, each unit in the above formula is randomly bonded or block bonded. In addition, R1, R2, R3 are each -CH 3, -CH = CH 2, -CH 2 CH = CH 2, -CH 2 CH 2 CH 2 CH 2 CH = CH -alkyl or alkenyl group is selected from 2. The alkenyl group may be present in any part of the molecule, but preferably at least two alkenyl groups are present.
(2)
Here, a is an integer of 1 to 200, and b is an integer of 1 to 400. In this case, a and b do not mean block combining, but they merely mean that the sum of the units is a and b. Therefore, each unit in the above formula is randomly bonded or block bonded.
In the antistatic silicone mold release composition according to an embodiment of the present invention, the alkenyl polysiloxane represented by the general formula (1) and the hydro-total polysiloxane represented by the general formula (2) may be any of linear, branched, radial and cyclic, Mixtures are also good. The mixing ratio of the alkenylpolysiloxane and the hydrolytic polysiloxane is preferably 2.5 to 7.5 parts by weight based on 100 parts by weight of the alkenylpolysiloxane. If the amount of the hydrolytic polysiloxane is less than 2.5 parts by weight, sufficient curability can not be obtained due to an increase in the amount of unreacted alkenylpolysiloxane, thereby failing to realize stable mold release properties. If the amount of the hydrolytic polysiloxane exceeds 7.5 parts by weight, The peeling property may be deteriorated.
The antistatic silicone mold release composition according to an embodiment of the present invention is further characterized by including a release force adjusting agent. The release power adjusting agent is preferably an organopolysiloxane resin containing a hydroxyl group and has a structure in which units of M, D, T and Q represented by the following formula 3 are repeated in a straight chain, branched, radial or cyclic form . Further, it is preferable that the substituent R 4 on the peel strength adjusting agent contains at least one of methyl, ethyl, hexyl, vinyl, hexenyl, phenyl, and hydroxyl at the same time.
(3)
The release force modifier in the antistatic silicone mold release composition according to one embodiment of the present invention preferably comprises 20 to 50 parts by weight of a release power adjuster relative to 100 parts by weight of the alkenyl polysiloxane. When the content of the peeling power adjuster is less than 20 parts by weight, the peeling force is insignificantly different from the peeling strength. If the peeling force adjusting agent content exceeds 50 parts by weight, the peeling force becomes too high, Can occur.
The antistatic silicone mold release composition according to an embodiment of the present invention is characterized in that a conductive polymer resin is used to impart antistatic properties. The conductive polymer resin is preferably an aqueous dispersion containing a polyanion and a polythiophene or a water dispersion containing a polyanion and a polythiophene derivative.
The polyanion is an acidic polymer, such as a polymeric carboxylic acid or a polymeric sulfonic acid, or polyvinylsulfonic acid. Examples of the polymeric carboxylic acid include polyacrylic acid, polymethacrylic acid, and poly maleic acid. Examples of the polymeric sulfonic acid include, but are not limited to, polystyrene sulfonic acid and the like.
It is preferable that the polythiophene or the polythiophene derivative has an excessive amount of the solid weight ratio of the polyanion in terms of imparting conductivity. In the embodiment of the present invention, an aqueous dispersion containing 0.5% by weight of poly (3,4-ethylenedioxythiophene) and 0.8% by weight of polystyrene sulfonic acid is used, but the present invention is not limited thereto. Preferably, the weight ratio of polythiophene or polythiophene derivative to polyanion is in the range of more than 1 and less than 5, more preferably more than 1 and less than 3.
In addition, the conductive polymer resin is characterized by being able to exhibit stable antistatic performance by using an aqueous dispersion having an average particle size of 10 to 60 nm, more preferably 20 to 50 nm. When the average particle diameter of the conductive polymer resin is more than 60 nm, it is not uniformly distributed in the coating layer, and the variation of the surface resistance becomes very large, and the antistatic performance can not be realized properly.
The conductive polymer resin in the antistatic silicone mold release composition according to an embodiment of the present invention preferably comprises 1 to 5 parts by weight of a conductive polymer resin per 100 parts by weight of the alkenyl polysiloxane. When the content of the conductive polymer resin is less than 1 part by weight, sufficient antistatic properties can not be obtained. When the amount is more than 5 parts by weight, the peeling force and the residual adhesion ratio are influenced.
The antistatic silicone mold release composition according to an embodiment of the present invention can provide stable antistatic properties and antistatic properties by controlling the cross-linking density, improve the compatibility of the conductive polymer resin to achieve uniform antistatic properties, And further includes a binder mixture for the purpose of improving the formability and durability and increasing the adhesion between the coating layer and the substrate. The binder mixture preferably comprises a silane-based compound and a non-silane-based multifunctional compound.
The silane-based compound improves the adhesion between the hydrolytic polysiloxane and the release power adjusting agent in the silicone mold-releasing composition constituting the coating layer and the base film. Such a silane compound may include any epoxy silane compound, amino silane compound, vinyl silane compound, methacryloxy silane compound, isocyanate silane compound, and preferably includes an epoxy silane compound.
The mesylate-based polyfunctional compound acts not only as a crosslinking agent between the conductive polymer resins but also increases the adhesion between the hydrolytic polysiloxane and the antistatic component and the adhesion between the conductive polymer resin and the substrate film, It is possible to improve the durability of the coating layer and improve the residual adhesion rate. Such an empirical multifunctional compound is preferably characterized by comprising an epoxy-based compound having at least one epoxy functional group. Further, the epoxy compound is preferably a polyfunctional compound which further comprises at least one functional group selected from the group consisting of epoxy, amino, hydroxyl, aldehyde, ester, vinyl, acrylic, imide, cyano and isocyanate And preferably has three or more functional groups in one molecule. Although the sorbitol polyglycidyl ether compound is used in the examples of the present invention, it is obvious that the scope of the present invention is not limited thereto.
Also, the content of the silane-based compound and the mesylate-based polyfunctional compound in the binder mixture according to an embodiment of the present invention is such that the weight ratio of the solid content of the mesylate-based polyfunctional compound to the silane-based compound is excessively increased, In order to increase the adhesive force between the substrate and the substrate. Preferably, the weight ratio of the silane-based compound to the mesylate-based polyfunctional compound is in the range of more than 2 and less than 20, more preferably in the range of more than 5 and less than 20. When the weight ratio of the mesylate-based polyfunctional compound to the silane-based compound is less than 2, the crosslinking functionality of the conductive polymer resin is weakened due to the insufficient amount of the naphthalene-based epoxy compound compared to the silane-based compound, so that the conductive polymer resin may be separated from the coating layer And when it is more than 20, the adhesion of the silicone mold-releasing component to the base film is lowered as the ratio of the silane-based compound is relatively low, which is not preferable.
The binder mixture in the antistatic silicone mold release composition preferably comprises 5 to 20 parts by weight of the binder mixture per 100 parts by weight of the alkenyl polysiloxane. If the content of the binder mixture is less than 5 parts by weight, there is a problem that the coating layer is low in adhesion to the base material, peeling off the coating layer, or miscibility of the conductive polymer resin, resulting in uneven antistatic properties. When the content of the binder mixture is 20 If the amount is more than 1 part by weight, the peeling force and the residual adhesive ratio are affected, and the problem of deteriorated releasability is caused.
In the antistatic silicone mold release composition, the platinum chelate catalyst serves to facilitate the addition reaction of the general formulas (1) and (2), and the platinum chelate catalyst may further contain 10 ppm to 1000 ppm in the antistatic silicone mold release composition.
In addition, the antistatic silicone mold release composition according to an embodiment of the present invention is diluted so as to contain 1 to 10% by weight of solids based on the total weight of the coating composition, and then coated on the polyester base film. When the solid content of the antistatic silicone mold release composition is less than 1% by weight, a uniform coating layer can not be obtained and stable mold release characteristics and antistatic properties can not be obtained. When the content is more than 10% by weight, blocking phenomenon occurs between the films, The adhesion of the composition to the base material is deteriorated to cause problems in the transfer of silicon, and the appearance of the coating becomes poor.
The solvent of the antistatic silicone mold releasing composition is not limited as long as it can be coated on the polyester base film by dispersing the solid content of the present invention, but is preferably coated in the state of an aqueous coating solution using water as a main medium . In addition, the antistatic heavy silicone release film according to an embodiment of the present invention is such that the surface tension of the polyester base film is 1.0 to 1.5 times the antistatic silicone release composition. If the surface tension of the polyester base film is less than 1.0, the wettability of the coating liquid deteriorates. If the surface tension of the polyester base film is more than 1.5, the coating liquid may agglomerate to cause appearance defects.
Further, for the purpose of improving the coating property and the transparency of the coating composition used in the present invention, the coating composition may further contain an appropriate organic solvent to the extent that the effect of the present invention is not impaired. Preferred organic solvents include isopropyl alcohol , Butyl cellosolve, ethyl cellosolve, acetone, methanol, ethanol and the like can be used. However, when a large amount of an organic solvent is contained in the coating composition, there is a risk of explosion in the drying, stretching and heat treatment processes when the coating composition is applied to the inline coating method. Therefore, the content of the organic solvent is preferably 10 wt% 5% by weight or less.
The thickness of the antistatic heavy silicone release film according to an embodiment of the present invention is preferably 15 to 300 mu m. When the thickness of the film is less than 15 탆, the degree of deformation due to external force becomes large, and therefore the film can not be used as a carrier film. If the thickness exceeds 300 탆, economical efficiency is deteriorated.
2, which is a cross-sectional view of an antistatic, heavyweight silicone release film comprising an antistatic, heavy silicone release layer according to another aspect of the present invention, the antistatic heavy silicone release layer according to another aspect of the present invention, The anti-moderate
3, which is a cross-sectional view of an antistatic, heavyweight silicone release film comprising an antistatic heavyweight silicone release layer according to another aspect of the present invention, includes an antistatic heavyweight silicone release layer according to another aspect of the present invention The antistatic heavy
Hereinafter, the structure and effect of the present invention will be described in more detail with reference to examples and comparative examples. However, this embodiment is intended to explain the present invention more specifically, and the scope of the present invention is not limited to these embodiments.
≪ Example 1 >
100 parts by weight of an alkenylpolysiloxane represented by the general formula (1) (manufactured by DOW CORNING CO., LTD.) As a solid component for forming an antistatic heavy silicone release layer on one side of a corona-treated polyester base film (Excell- , 5 parts by weight of a hydrolytic polysiloxane (manufactured by DOW CORNING CO., LTD.) Represented by the formula (2), 50 parts by weight of a peel strength adjusting agent (manufactured by Dow Corning) , 2.5 parts by weight of an aqueous dispersion containing 0.5% by weight of a polyfunctional epoxy compound and 0.8% by weight of polystyrene sulfonic acid (molecular weight Mn = 150,000), 1 part by weight of a binder mixture (epoxy silane compound (Z- And 9 parts by weight of sorbitol polyglycidyl ether (EX-614B, manufactured by Nagase)) and 50 parts by weight of a platinum chelate catalyst (manufactured by Dow Corning) Antistatic silicone mold release compositions were prepared. The antistatic silicone release composition thus prepared was diluted with water to a solids content of 5% and applied to one side of the polyester base film. After the application, the film was dried at 180 캜 for 50 seconds to prepare an antistatic heavy silicone release film.
≪ Example 2 >
An antistatic heavyweight silicone release film was produced in the same manner as in Example 1 except that 25 parts by weight of the release power adjusting agent was mixed with 100 parts by weight of the alkenylpolysiloxane.
≪ Example 3 >
An antistatic heavyweight silicone release film was produced in the same manner as in Example 1 except that 5 parts by weight of the conductive polymer resin was mixed with 100 parts by weight of the alkenylpolysiloxane.
≪ Comparative Example 1 &
A silicone release film was produced in the same manner as in Example 1 except that no release power adjusting agent was mixed.
≪ Comparative Example 2 &
A silicone release film was prepared in the same manner as in Example 1 except that 100 parts by weight of the alkenyl polysiloxane and 10 parts by weight of the release power adjusting agent were mixed.
≪ Comparative Example 3 &
A silicon release film was produced in the same manner as in Example 1 except that 25 parts by weight of the binder mixture was mixed with 100 parts by weight of the alkenylpolysiloxane.
≪ Comparative Example 4 &
A silicone release film was prepared in the same manner as in Example 1 except that 2.5 parts by weight of the binder mixture was mixed with 100 parts by weight of the alkenylpolysiloxane.
≪ Comparative Example 5 &
A silicone release film was produced in the same manner as in Example 1 except that the binder mixture was not mixed.
≪ Comparative Example 6 >
A silicone release film was produced in the same manner as in Example 1 except that the conductive polymer resin was not mixed.
The properties of the silicone release films according to Examples 1 to 3 and Comparative Examples 1 to 5 were measured through the following experimental examples, and the results are shown in Table 1 below.
[Experimental Example]
1. Peeling force measurement
- Sample preparation: Adhesive tape (TESA7475) is placed on the cold-rolled stainless steel plate so that the coating layer is on the top, and the adhesive layer is pressed on the coating layer with a 2kg compression roller and left for 24 hours.
- Measuring method: Using a Chem-Instrument AR-1000 equipment, measure the peeling force by applying a peeling angle of 180 degrees and a peeling speed of 0.3 mpm.
- Measurement data: The peel force unit is g / inch and the measured value is measured five times to calculate the average value.
2. Residual adhesion rate
- An adhesive tape (Nitto 31B) was placed on the coating layer, pressed with a 2 kg compression roller, and allowed to stand for 30 minutes. The tape was peeled off from the releasing film and then stuck to a cold-rolled stainless steel plate, and the adhesive strength was measured in accordance with the measuring method of Experimental Example 1. [ At this time, the measured adhesive force is set to "A ". On the other hand, the adhesive strength of the unused adhesive tape (Nitto 31B) to the rolled stainless steel plate was derived in the same manner to obtain "B", and the residual adhesive ratio was calculated by the following formula.
Residual Adhesion Ratio = (A / B) * 100 (%)
3. Antistatic characteristics
- The surface resistance of the coating layer was measured according to JIS K7194 after setting the sample under an environment of a temperature of 23 ° C and a humidity of 50% RH using a surface resistance meter (Mitsubishi, MCP-T600).
4. Solvent resistance
- To measure the resistance of the film surface to solvents. The measurement was carried out by wetting the swab with isopropyl alcohol, and the coating layer was reciprocated 10 times at a load of 100 g while maintaining the angle of the swab at 45 degrees, and then the state of the coated surface was evaluated according to the following criteria.
(?: Excellent,?: Good,?: Normal, X:
5. Thickness
- The coating layer was rubbed 5 times with a thumb and visually evaluated.
No smear (◎): No change after evaluation
Slightly smear (○): Thinly pressed but no problem in use
Smear (△): cloudy cloud of coating as oil is pushed
Rub-off (X): Coat layer clumps off
(Ω / sq)
As can be seen from Table 1, the antistatic heavy silicone release film produced in the example according to the present invention has a peeling force of 50 g / inch or more and 150 g / inch or less and a residual adhesion ratio of 90% While the surface resistance is 10 11 Ω / sq or less, which indicates that it has excellent antistatic properties. It is also found that the coating layer is excellent in durability and adhesion strength between the coating layer and the base material is also excellent due to excellent solvent resistance and pilling resistance.
On the other hand, in the case of Comparative Example 1, in the case where the release power adjusting agent is not mixed, it is found that the release force is out of the desired range and corresponds to the light weight. In the case of Comparative Example 2, It can be seen that it is difficult to distinguish from delamination because it is not within the desired range. In addition, in Comparative Example 3, although the durability of the coating layer was ensured due to the excessive addition of the binder mixture, it was found that the peeling force was excessively increased and deviated from the heavy bleeding region. In Comparative Example 4, the durability of the coating layer was insufficient and the solvent resistance was not ensured due to insufficient level of the binder mixture. In Comparative Example 5, since the binder mixture was not added, the durability of the coating layer was weakened, It can not be ensured that the adhesion between the coating layer and the substrate is deteriorated and the coating layer is easily peeled off. On the other hand, in the case of Comparative Example 6, it can be confirmed that the antistatic property is not developed due to no mixing of the conductive polymer resin.
As described above, the antistatic heavy silicone release film according to the present invention may be suitably applied to a desired application, but is not limited thereto. The present invention also provides a high quality antistatic, heavy duty silicone release film for use in the field of precision materials, which has an appropriate range of peel strength and a high level of residual adhesion to lower the functionality of the adhesive layer And can be suitably used according to the application. Further, the coating layer has excellent durability, has a solvent resistance to an organic solvent, has a high adhesion force with a substrate, and has a low dropout of a coating layer due to friction. In addition, it has an excellent antistatic property, which can prevent problems such as contamination due to electrostatic phenomenon and peeling failure.
It is to be understood that the present invention is not limited to the above embodiments and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.
100, 200, 300: Antistatic heavyweight silicone release film
110, 210, 310: polyester base film
120, 220, 320: antistatic heavy silicone release coating layer
230: antistatic silicone release coating layer
330: silicone release coating layer
Claims (12)
A polyester base film; and a coating layer applied on at least one side of the polyester base film at least once with an antistatic silicone release composition,
Wherein said antistatic silicone mold release composition comprises an alkenyl polysiloxane, a hydrosoluble polysiloxane, a peel strength modifier, a conductive polymer resin, a binder mixture and a platinum chelate catalyst.
The antistatic silicone mold release composition is prepared by mixing 2.5 to 7.5 parts by weight of the hydrogel polysiloxane, 20 to 50 parts by weight of the release power adjusting agent, 1 to 5 parts by weight of the conductive polymer resin, 100 parts by weight of the binder mixture 5 To 20 parts by weight of the platinum chelate catalyst and 10 ppm to 1000 ppm of the platinum chelate catalyst.
Wherein the binder mixture comprises a silane-based compound and an emulsion-based multifunctional compound.
The silane compound is at least one compound selected from the group consisting of an epoxy silane compound, an amino silane compound, a vinyl silane compound, a methacryloxy silane compound, and an isocyanate silane compound,
Wherein the naphthalene-based polyfunctional compound is an epoxy-based polyfunctional compound having an epoxy functional group.
The epoxy-based polyfunctional compound may further comprise at least one functional group selected from the group consisting of an epoxy group, an amino group, a hydroxyl group, an aldehyde group, an ester group, a vinyl group, an acrylic group, an imide group, a cyano group and an isocyanate group An antistatic heavy silicone release film characterized by having three or more functional groups in the molecule.
Wherein the weight ratio of the mesylate-based polyfunctional compound to the silane-based compound is 2 to 20.
Wherein the polyester base film has a surface tension of 1.0 to 1.5 times the antistatic silicone release agent composition.
Wherein the conductive polymer resin is an aqueous dispersion containing an aqueous dispersion containing a polyanion and a polythiophene or a polyanion and a polythiophene derivative having an average particle diameter of 10 to 60 nm, .
Wherein the peel strength regulating agent is an organopolysiloxane resin containing a hydroxyl group.
Wherein the antistatic silicone mold releasing composition contains 1 to 10% by weight of solids.
Wherein the antistatic heavy-weight silicone release film has a thickness of 15 to 300 占 퐉.
Wherein the coating layer satisfies the following formulas (1) to (3) simultaneously,
50? RF? 150 (Equation 1)
90? SA? 100 (Equation 2)
SR ≤ 10 ^ 11 (Equation 3)
Wherein an RF (g / inch) is a peeling force of the coating layer, SA (%) is a residual adhesive ratio of the coating layer, and SR (? / Sq) is a surface resistance of the coating layer. Silicone release film.
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| KR1020160018706A KR20170096881A (en) | 2016-02-17 | 2016-02-17 | Anti-static silicone tight-release coating film |
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| WO2019245251A1 (en) * | 2018-06-20 | 2019-12-26 | 도레이첨단소재 주식회사 | Silicone release film, and protective film comprising same for adhesive film and adhesive tape |
| KR20200081927A (en) * | 2018-12-28 | 2020-07-08 | 도레이첨단소재 주식회사 | Anti-static silicone release film |
| WO2020189882A1 (en) * | 2019-03-20 | 2020-09-24 | 도레이첨단소재 주식회사 | Antistatic silicone release film |
| US10854357B2 (en) * | 2016-07-11 | 2020-12-01 | Shin-Etsu Polymer Co., Ltd. | Coating material for forming conductive release layer, method for producing same, conductive release film, and method for producing same |
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| WO2019245251A1 (en) * | 2018-06-20 | 2019-12-26 | 도레이첨단소재 주식회사 | Silicone release film, and protective film comprising same for adhesive film and adhesive tape |
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