Composition for release film and release film using the same

Abstract

The composition for release film and the release film using the same according to the present invention provide an effect of reducing the release force without reducing the residual adhesion rate by forming a release layer with a composition containing a release force regulator, the release force regulator containing a long chain or branched chain alkyl group capable of providing release force reduction and further containing a reactive group that can be bonded to the release agent. In particular, the long chain or branched chain alkyl group contained in the release force regulator inhibits intermolecular interaction to reduce the hardness of the release layer, causing a reduction in the release force, and further the reactive group added to the release force regulator bonds to the release agent after the curing reaction, thereby inhibiting the transfer of silicone to the adherend and preventing the reduction of the residual adhesion rate.

Description

Technical Field

[0001] The present invention relates to a composition for a release film and a release film using the same, and more particularly, to a composition for a release film capable of providing an effect of reducing peeling force without reducing residual adhesion rate, and a release film using the same. Background Art

[0002] Films having so-called release properties that do not adhere well to adhesive components or pressure-sensitive adhesive components are collectively referred to as release films, which have a structure having a base film and a release layer formed on the base film. Typically, release films are attached to adhesive / pressure-sensitive adhesive films or tapes to serve as protective films to prevent the adhesive / pressure-sensitive adhesive from attaching to undesired adherends or from being contaminated by dust or foreign matter until use. In addition, release films can be used to prevent molds and molded products from adhering to each other during heating and press molding processes such as printed wiring board molding, in-mold molding, etc., or can be used as carrier films for molding thin ceramic sheets, such as dielectrics for multilayer ceramic capacitors.

[0003] The peel force, which is the force required to separate the release film from the pressure-sensitive adhesive, is one of the most representative physical properties that express the performance of the release film. It is necessary to develop release films having various peel forces according to the aforementioned uses in the field of release films.

[0004] For example, Korean Patent No. 10-1136137 discloses physical properties of a tight release film, which is a tight release coated polyester film including a tight release layer in which a silicone release film composition is applied at least once to at least one side of a polyester base film, wherein the silicone release film composition comprises a peeling force regulator containing alkenyl polysiloxane and hydrogen polysiloxane and having a ratio of hydroxyl to alkenyl of 0.1 to 0.5, a silane coupling agent, and a surfactant.

[0005] When trying to obtain tight release force with solvent-based addition silicones commonly used in the field of release films, a release force regulator is generally used, and a release film with stronger release force can be produced by increasing the amount of the release regulator. However, in this case, adhesion to the base film is reduced and problems with silicon transfer may occur.

[0006] In addition, the release layer constituting the release film may use a release force regulator to adjust the release force to reduce the release force to a desired level. However, when the release force is reduced by using a release force regulator, the residual adhesion rate may also be reduced. Such a reduction in the residual adhesion rate may cause the silicone of the release layer to migrate or transfer to the adherend, contaminate the adherend, or change the surface properties of the adherend. Summary of the invention

[0007] Technical issues

[0008] The present invention has been designed to solve the above-mentioned problems, and the present invention can provide a composition for a release film that can reduce the release force without reducing the residual adhesion rate by using a release force adjuster, and a release film using the same.

[0009] The foregoing and other objects and advantages of the present invention will become apparent to those skilled in the art from a reading of the following description which illustrates preferred embodiments of the present invention.

[0010] Technical Solution

[0011] The above object is achieved by a composition for a release film comprising a release agent, hydrogen polysiloxane, a platinum chelate catalyst, and a release force regulator according to the following Formula 1.

[0012] (Formula 1)

[0013] H-SiR1R2-O-(SiR1R2-O)n-(SiR1R2-CH2CH2O)-R3

[0014] Here, R1 and R2 are independently hydrogen or an alkyl group, R3 is an alkyl group having 6 to 18 carbon atoms, and n is an integer of 0 or more.

[0015] Preferably, R1 and R2 in Formula 1 may be methyl groups.

[0016] Preferably, R3 in Formula 1 may be a long-chain or branched alkyl group having 6 to 18 carbon atoms.

[0017] Preferably, the composition for a release film may include 0.5 wt % to 5 wt % of the release force regulator based on the total solid content.

[0018] Preferably, the release agent may be polydimethylsiloxane (PDMS) including a vinyl group located at the end or in the middle of the chain.

[0019] In addition, the above-mentioned purpose is achieved by a release film, which includes a polyester base film and a release layer located on one side of the polyester base film and formed by curing a composition for a release film, wherein the composition for a release film includes a release agent, hydrogen polysiloxane, a platinum chelate catalyst and a peeling force regulator according to the following formula 1.

[0020] (Formula 1)

[0021] H-SiR1R2-O-(SiR1R2-O)n-(SiR1R2-CH2CH2O)-R3

[0022] Here, R1 and R2 are independently hydrogen or an alkyl group, R3 is an alkyl group having 6 to 18 carbon atoms, and n is an integer of 0 or more.

[0023] Preferably, R1 and R2 in Formula 1 may be methyl groups, and R3 may be a long-chain or branched alkyl group having 6 to 18 carbon atoms.

[0024] Preferably, the composition for a release film may include 0.5 wt % to 5 wt % of the release force regulator based on the total solid content.

[0025] Preferably, the peel strength of the release film may be 19 gf / 25 mm or less.

[0026] Preferably, the residual adhesion rate of the release film may be 89% or more.

[0027] Preferably, the melting temperature measured by separating the release layer from the release film may be -47°C or less.

[0028] Beneficial Effects

[0029] The composition for a release film and the release film using the same according to one embodiment of the present disclosure can reduce the hardness of the release layer by a release force regulator to reduce the release force, and also inhibit the transfer of silicone to an adherend (adhesive base film) to prevent the residual adhesion rate from decreasing.

[0030] However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a block diagram of a release film according to one embodiment of the present invention. DETAILED DESCRIPTION

[0032] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily practice the present disclosure. However, the present disclosure can be implemented in various different forms and is not limited to the embodiments provided in this specification.

[0033] In the accompanying drawings, the thickness of layers, films, panels, regions, etc., is exaggerated for clarity. Throughout the specification, the same reference numerals represent the same elements. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element may be directly on the other element, or there may also be intermediate elements. In contrast, when an element is referred to as being "directly on" another element, there are no intermediate elements.

[0034] Unless otherwise limited, all technical and scientific terms used herein have the same meaning as those of ordinary skill in the art to which the invention belongs. In the event of a conflict, the present specification (including definitions) shall prevail. In addition, although methods and materials similar or equivalent to the methods and materials described herein can be used in the practice or testing of embodiments of the present invention, suitable methods and materials are described below.

[0035] Figure 1 is a block diagram of a release film according to one embodiment of the present invention.

[0036] Reference Figure 1 , a release film according to an embodiment of the present invention includes a polyester base film 110 and a release layer 120. Figure 1 The release layer 120 is shown to be located only on one side of the polyester base film 110, but the release layer 120 may be located on both sides of the polyester base film 110. The release layer 120 is formed by applying a composition for a release film including a release agent and a peeling force regulator to the polyester base film 110 and curing it.

[0037] In one embodiment, the composition for a release film may include a release agent, hydrogen polysiloxane, a platinum chelate catalyst, and a peel force regulator according to the following Formula 1.

[0038] (Formula 1)

[0039] H-SiR1R2-O-(SiR1R2-O)n-(SiR1R2-CH2CH2O)-R3

[0040] Here, R1 and R2 are independently hydrogen or an alkyl group, R3 is an alkyl group having 6 to 18 carbon atoms, and n is an integer of 0 or more.

[0041] In one embodiment, R1 and R2 in Formula 1 may each be a methyl group.

[0042] In one embodiment, R3 can be a long chain or branched alkyl group having 6 to 18 carbon atoms. In the peeling force regulator according to Formula 1, the long chain or branched alkyl group can suppress intermolecular interactions to reduce the hardness of the release layer 120, thereby reducing the peeling force. A reactive group is added to the peeling force regulator, and the reactive group is bonded to the release agent after the curing reaction to suppress the transfer of silicone to the adherend (adhesive base film), thereby preventing the residual adhesion rate from decreasing. In this case, the alkyl group of R3 can preferably have 6 to 18 carbon atoms. If the alkyl group of R3 has less than 6 carbon atoms, the effect of suppressing intermolecular interactions is low, and the effect of reducing the peeling force is low. If the alkyl group of R3 exceeds 18 carbon atoms, it is inefficient in terms of the availability of raw materials and the ease of synthesis.

[0043] In the embodiments described herein, the release force regulator according to Formula 1 is described by way of example in which both R1 and R2 are methyl groups and n is 0. However, R1 and R2 may be alkyl groups having two or more hydrogen or carbon atoms and n may be an integer of 0 or more.

[0044] In one embodiment, the composition for a release film preferably includes 0.5 wt % to 5 wt % of a release force regulator according to Formula 1, based on the total solid content (100 wt %). At this time, if the content of the release force regulator is less than 0.5 wt %, the effect of reducing the release force is low, and if the content of the release force regulator exceeds 5 wt %, the residual adhesion rate is reduced.

[0045] The release agent included in the composition for a release film preferably includes a polysiloxane polymer or copolymer, and more preferably, includes polydimethylsiloxane (PDMS) including a vinyl group located at the end or in the middle of the chain.

[0046] The alkenyl polysiloxane used as the release agent is preferably at least one selected from the group consisting of an addition type, a condensation type, and an ultraviolet curable type, and more preferably, an alkenyl polysiloxane according to Formula 2 below.

[0047] (Formula 2)

[0048]

[0049] In Formula 2, as R1, R2 and R3, at least two are selected from -CH=CH2, -CH2-CH2-CH2-CH2-CH=CH2 or -CH3, there is at least one alkenyl group in the molecule, and m and n are integers of 50 to 300.

[0050] Polydimethylsiloxane (PDMS) contains alkenyl groups in the molecule, wherein the alkenyl groups may be present at any position of the molecule, and preferably at least two alkenyl groups are present. In addition, the molecule may have a long chain or a branched structure, or may have a structure in which both long chains and branched structures coexist.

[0051] In addition, as the curing agent of the composition for the release film, any type of curing agent may be used, such as an addition type, a condensation type, and an ultraviolet curable type, etc. In the present invention, the hydrogen polysiloxane according to Formula 3 is preferably used.

[0052] Formula 3

[0053]

[0054] In Formula 3, p is 20 to 300, and q is 0 to 300.

[0055] Hydrogen polysiloxane is not limited in terms of viscosity or molecular weight, but must be well compatible with alkenyl polysiloxane. For its usage, preferably 1.0 to 2.0 hydrogen groups are bonded to the organosilicon atom based on one alkenyl group of the alkenyl polysiloxane. At this time, if the number of hydrogen atoms bonded to the organosilicon atom based on one alkenyl group of the alkenyl polysiloxane is less than 1.0, the composition cannot be cured well. If the number of hydrogen atoms bonded thereto is greater than 2.0, the elasticity or physical properties after the curing process may be deteriorated and the change in peel force over time may increase due to the reaction between the residual hydrogen groups and the adhesive layer.

[0056] The composition for the release film preferably contains 0.8 to 10.0 parts by weight of hydrogen polysiloxane based on 100 parts by weight of the release agent. If the amount of hydrogen polysiloxane is less than 0.8 parts by weight, the hardness of the release layer is reduced due to insufficient crosslinking. If the amount is greater than 10.0 parts by weight, excessive crosslinking is promoted, resulting in reduced flexibility.

[0057] In addition, the platinum chelate catalyst of the composition for release film promotes the addition reaction between polydimethylsiloxane and hydrogen polysiloxane. The amount of the platinum chelate catalyst is preferably 0.5 to 2 parts by weight based on 100 parts by weight of polydimethylsiloxane.

[0058] In addition, the polyester film used for the polyester base film 110 is not limited to a specific type, and a known conventional polyester film can be used as a base film for a silicone-based release layer (release coating). In the present invention, the exemplary polyester film has a polyester resin, such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc. It should be noted that the present invention is not limited to polyester sheets or films. The polyester constituting the film of the present invention is obtained by polycondensation of aromatic dicarboxylic acids and aliphatic diols. Examples of aromatic dicarboxylic acids include terephthalic acid, 2,6-naphthalene dicarboxylic acid, etc. Examples of aliphatic diols include ethylene glycol, diethylene glycol, 1,4-cyclohexanedimethanol, etc.

[0059] The example of polyester includes polyethylene terephthalate (PET), polyethylene 2,6-naphthalate (PEN) etc., and can also include the copolymer comprising the third component. The example of the dicarboxylic acid component of copolymer polyester includes isophthalic acid, phthalic acid, terephthalic acid, 2,6-naphthalene dicarboxylic acid, adipic acid, sebacic acid, hydroxycarboxylic acid (oxycarboxylicacid) (for example, paraben). The example of diol component includes ethylene glycol, diethylene glycol, propylene glycol, butanediol, 1,4-cyclohexanedimethanol, neopentyl glycol etc. Two or more types of dicarboxylic acid and diol components can be mixed and used. For the base film of the present invention, a uniaxial or biaxial oriented film is used for all high transparency, productivity and processability.

[0060] In addition, the polyester base film 110 according to the present invention may contain particles to impart excellent running characteristics between rollers. There is no particular restriction on the type of particles, as long as the added particles can show excellent slipperiness. In the present invention, the particles may include silica, silicon oxide, calcium carbonate, calcium sulfate, calcium phosphate, magnesium carbonate, magnesium phosphate, barium carbonate, kaolin, aluminum oxide, titanium dioxide, etc. The particles used are not particularly limited to a specific shape, but preferably, any one of spherical, blocky, rod-shaped and plate-shaped particles can be used. In addition, the hardness, specific gravity and color of the particles are not particularly limited, but a combination of two or more types of particles can be used as needed. In addition, the average particle size of the particles used is preferably in the range of 0.1 μm to 5 μm, more preferably 0.1 μm to 2 μm. If the average particle size of the particles is less than 0.1 μm, aggregation between the particles may occur, resulting in poor dispersion. If the average particle size of the particles exceeds 5 μm, the surface roughness characteristics of the film are deteriorated, which may cause coating failure during post-processing.

[0061] The method for manufacturing a release film according to one embodiment of the present invention includes applying the above-mentioned composition for a release film onto a polyester base film 110 and curing the composition for a release film to form a release layer.

[0062] The peeling force of the release film according to one embodiment of the present invention thus manufactured is preferably 19gf / 25mm or less. At this time, if the peeling force exceeds 19gf / 25mm, it is not possible to properly peel off from the adhered object (adhesive base film), resulting in problems in the process.

[0063] The residual adhesion rate of the release film according to one embodiment of the present invention is preferably 89% or more. At this time, if the residual adhesion rate is less than 89%, the release agent of the release layer remains on the adhered object (adhesive base film), thereby contaminating and damaging the surface of the adhered object and also changing the physical properties or characteristics of the surface.

[0064] The melting temperature of the release film according to one embodiment of the present invention measured by separating the release layer 120 from the release film is preferably -47°C or lower. More specifically, the melting temperature measured after scraping the release layer from the release film with a scraper is preferably -47°C or lower. At this time, if the melting temperature is greater than -47°C, the effect of reducing the peeling force is low.

[0065] Hereinafter, the present invention will be described in more detail with reference to examples.The following examples are provided to further illustrate the present invention and are not intended to limit the scope of the present invention.

[0066] [Example]

[0067] [Synthesis Examples 1 to 9]

[0068] Synthesis of release force regulator

[0069] A mixed solution containing 0.1 mol (2.0 equivalents) of 1,1,3,3-tetramethyldisiloxane (TMDS) and 50 ml of anhydrous toluene was placed in a dry round-bottom flask under a nitrogen atmosphere and stirred at room temperature. Thereafter, 1.0*10 -6 mol Pt catalyst and 0.05mol (1.0 equivalent) alkyl vinyl ether were then heated and stirred at 60°C for 20 hours. The reaction solution obtained by heating and stirring the mixed solution was cooled to room temperature and then concentrated to dryness to obtain a pale yellow liquid. Then, the liquid substance obtained by concentrating the reaction solution to dryness was purified by silica gel column chromatography (silica gel: Wakogel C-200 75cc, developing solution: heptane) to obtain a colorless liquid peeling force regulator.

[0070] The chemical reaction process of the peel force regulator is shown in Formula 4 described below.

[0071] (Formula 4)

[0072]

[0073] Synthesis Examples 1 to 9 prepared by changing the alkyl vinyl ether according to the synthesis of the above-mentioned release force regulator are shown in Table 1 below.

[0074] [Table 1]

[0075]

[0076]

[0077] [Example 1]

[0078] A polyester film (Toray Advanced Materials Co., Ltd., XD500P) having a thickness of 30 μm was prepared. In addition, 100 parts by weight of polydimethylsiloxane (manufactured by Dow Chemical Inc.), 3 parts by weight of hydrogen polysiloxane (manufactured by Dow Chemical Inc.), and 1 part by weight of a platinum chelate catalyst were diluted in a mixed solvent containing heptane and methyl isobutyl ketone (5:1 volume ratio) to prepare a composition having a total solid content of 5% by weight, and then the peeling force regulator according to Synthesis Example 4 was blended therein in an amount of 0.5% by weight based on the total solid content to prepare a composition for a release film for forming a release layer.

[0079] Thereafter, the composition for a release film was applied to one side of the polyester film and heat-treated in a hot air dryer at 150° C. for 2 minutes to form a release layer having a thickness of 0.3 μm to prepare a release film.

[0080] [Examples 2 to 6]

[0081] Release films were prepared in the same manner as in Example 1, except that the release force adjusters according to Synthesis Examples 5 to 9 were used, respectively.

[0082] [Example 7]

[0083] A release film was prepared in the same manner as in Example 1, except that a release force regulator was blended in an amount of 2.0 wt % based on the total solid content.

[0084] [Examples 8 to 12]

[0085] Release films were prepared in the same manner as in Example 1, except that the release force adjusters according to Synthesis Examples 5 to 9 were used, respectively.

[0086] [Example 13]

[0087] A release film was prepared in the same manner as in Example 1, except that a release force regulator was blended in an amount of 5.0% by weight based on the total solid content.

[0088] [Examples 14 to 18]

[0089] Release films were prepared in the same manner as in Example 13, except that the release force adjusters according to Synthesis Examples 5 to 9 were used, respectively.

[0090] [Comparative Example]

[0091] [Comparative Example 1]

[0092] A release film was prepared in the same manner as in Example 1, except that a release force regulator was blended in an amount of 10.0% by weight based on the total solid content.

[0093] [Comparative Examples 2 to 6]

[0094] Release films were prepared in the same manner as in Comparative Example 1, except that the release force adjusters according to Synthesis Examples 5 to 9 were used, respectively.

[0095] [Comparative Examples 7 to 9]

[0096] Release films were prepared in the same manner as in Example 1, except that the release force adjusters according to Synthesis Examples 1 to 3 were used, respectively.

[0097] [Comparative Example 10]

[0098] A release film was prepared in the same manner as in Example 1, except that the release force regulator was not added.

[0099] [Comparative Example 11]

[0100] A release film was prepared in the same manner as in Example 1, except that a release force regulator was blended in an amount of 0.4 wt % based on the total solid content.

[0101] [Comparative Example 12]

[0102] A release film was prepared in the same manner as in Example 1, except that a release force regulator was blended in an amount of 5.1% by weight based on the total solid content.

[0103] The physical properties were measured by the following Experimental Examples using the release films obtained in Examples 1 to 18 and Comparative Examples 1 to 12, and the results are shown in Table 2 below.

[0104] [Experimental example]

[0105] (1) Measurement of the peel strength of release film

[0106] The release films of the embodiments and comparative examples were cut into a size of 500 mm × 1500 mm to prepare samples. The samples were placed in an environment at 25 ° C and 65% RH for 24 hours, and then an adhesive tape (TESA7475) was pressed on the release layer of the sample under a load of 20 g / cm2 in an environment at 50 ° C for 24 hours. Thereafter, the peel strength was measured from an area of ​​250 mm × 1500 mm at an angle of 180 ° and a speed of 0.3 mpm using a chem-instrument AR-2000. After measuring the peel strength of the samples five times, the average value of the measured values ​​was calculated.

[0107] (2) Measurement of the residual adhesion rate of the release film

[0108] The release films of the examples and comparative examples were cut into a size of 500 mm × 1500 mm to prepare samples. The samples were placed in an environment at 25°C and 65% RH for 24 hours and then heated at room temperature at 20 g / cm 2 The adhesive tape (Nitto, 31B) was pressed on the release layer of the sample under a load of 24 hours. After that, the adhesive tape was peeled off from the release layer without pollution and then adhered to the smooth and clean PET film surface. Then, the adhesive tape adhered to the surface of the PET film was pressed once by reciprocating rolling of a 2kg belt roller (ASTMD-1000-55T) to laminate it. After that, the peel strength was measured from a region of 250mm×1500mm at an angle of 180° and a speed of 0.3mpm using chem-instrument AR-2000. The residual adhesion rate was calculated by substituting the measured value into the following equation 1.

[0109] (Equation 1)

[0110]

[0111] (3) Measurement of the melting temperature of the release layer

[0112] The release layer was scraped off from each release film of Examples and Comparative Examples with a scraper, and then heated from -80°C to 100°C at a rate of 10°C / min using DSC (TACo., Q2000) to measure the endothermic peak corresponding to the melting temperature.

[0113] [Table 2]

[0114]

[0115]

[0116] As seen in Table 2 above, Examples 1 to 18 in which the release force regulator according to Formula 1 was used according to a defined content simultaneously had a peel strength of 19 gf / 25 mm or less and a residual adhesion rate of 89% or more, and prevented the release agent of the release layer from transferring to the adhesive base film after the curing reaction. In addition, the melting temperature of the release layer of Examples 1 to 18 was -47°C or less, which showed an effect of reducing the peel force.

[0117] In contrast, in Comparative Examples 1 to 6 and 12 in which the release force regulator according to Formula 1 was used excessively, the residual adhesion rate was less than 89% and the release agent of the release layer was transferred to the adhesive base film, contaminating and damaging the surface of the adhesive base film and changing the physical properties or characteristics of the surface.

[0118] Furthermore, Comparative Example 7, in which a different release force adjuster was used instead of the release force adjuster according to Formula 1, did not have an effect of reducing the release force, and Comparative Examples 8 and 9 had a residual adhesion rate of less than 89%.

[0119] Furthermore, in Comparative Example 10 in which the release force adjuster was not used, the melting temperature exceeded -47°C and there was a problem of high release force.

[0120] In addition, in Comparative Example 11 in which the release force regulator according to Formula 1 was insufficiently used, the effect of reducing the release force was not shown, and in Comparative Example 12 in which the release force regulator according to Formula 1 was excessively used, the residual adhesion rate was reduced, and the release agent of the release layer was transferred to the adhesive base film, contaminating and damaging the surface of the adhesive base film, and changing the physical properties or characteristics of the surface.

[0121] While the invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but on the contrary is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

[0122] Reference numerals

[0123] 110: Polyester base film

[0124] 120: Release layer

Claims

1. A composition for a release film, comprising: A release agent, hydrogen polysiloxane, a platinum chelate catalyst, and a peeling force regulator according to the following formula 1: (Formula 1) H-SiR1R2-O-(SiR1R2-O)n-(SiR1R2-CH2CH2O)-R3, wherein R1 and R2 are independently hydrogen or an alkyl group, R3 is an alkyl group having 6 to 18 carbon atoms, and n is an integer of 0 or greater, The release agent is a polydimethylsiloxane containing a vinyl group at the end or in the middle of the chain, The composition comprises 0.5 wt % to 5 wt % of the release force regulator based on the total solid content, and The composition includes 0.8 parts by weight to 10.0 parts by weight of the hydrogenpolysiloxane based on 100 parts by weight of the release agent.

2. The composition according to claim 1, wherein R1 and R2 in Formula 1 are methyl groups.

3. The composition according to claim 1, wherein R3 in Formula 1 is a long-chain alkyl group having 6 to 18 carbon atoms.

4. The composition according to claim 1, wherein R3 in Formula 1 is a branched alkyl group having 6 to 18 carbon atoms.

5. A release film, comprising: Polyester base film; and A release layer located on one side of the polyester base film and formed by curing a composition for a release film, the composition for a release film comprising a release agent, hydrogen polysiloxane, a platinum chelate catalyst, and a peeling force regulator according to the following Formula 1: (Formula 1) H-SiR1R2-O-(SiR1R2-O)n-(SiR1R2-CH2CH2O)-R3, wherein R1 and R2 are independently hydrogen or an alkyl group, R3 is an alkyl group having 6 to 18 carbon atoms, and n is an integer of 0 or greater, The release agent is a polydimethylsiloxane containing a vinyl group at the end or in the middle of the chain, The composition comprises 0.5 wt % to 5 wt % of the release force regulator based on the total solid content, and The composition includes 0.8 parts by weight to 10.0 parts by weight of the hydrogenpolysiloxane based on 100 parts by weight of the release agent. 6 . The release film according to claim 5 , wherein in Formula 1, R1 and R2 are methyl groups, and R3 is a long-chain alkyl group having 6 to 18 carbon atoms. 7 . The release film according to claim 5 , wherein in Formula 1, R1 and R2 are methyl groups, and R3 is a branched alkyl group having 6 to 18 carbon atoms. The release film according to claim 5 , wherein the release film has a peel strength of 19 gf / 25 mm or less. 9 . The release film according to claim 5 , wherein a residual adhesion rate of the release film is 89% or more. 10 . The release film according to claim 5 , wherein a melting temperature measured by separating the release layer from the release film is −47° C. or less.

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