JP5541468B2 - Release film - Google Patents

Description

  The present invention relates to a release film, for example, used for molding an optical semiconductor element or a semiconductor element, and more particularly to a release film used for molding an LED lens.

For example, an optical semiconductor element made of LED, photoisolator, phototransistor, photodiode, CCD, CMOS, etc., or a semiconductor element made of transistor, IC, LSI, VLSI, etc., is sealed with a silicone rubber composition or an epoxy resin composition. It is made of a material and sealed by molding.

A mold forming apparatus is used for sealing such optical semiconductor elements and semiconductor elements, and a silicone rubber composition or an epoxy resin composition is filled as a sealing material into a mold of the mold forming apparatus and molded.

In this case, as a method for releasing the mold and the molded product, for example, a method in which a release film is interposed between the mold and the sealing material filled in the mold has been put into practical use ( Patent Document 1). The release film is supplied Roll-to-Roll in the mold forming apparatus, enters the mold that is temperature-controlled at the molding processing temperature, is sucked in vacuum and is in close contact with the mold, and then filled with a sealing material Is done. When the mold is opened after a certain time, the molded product is peeled off from the mold release film while the mold release film remains sucked into the mold. As the release film, for example, a thermoplastic fluororesin tetrafluoride-ethylene copolymer resin (ETFE resin) or a tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP resin) is used. (See Patent Document 2).

However, when such a release film is used for molding an LED lens using a silicone rubber composition as a sealing material, for example, for a bullet-shaped lens shape having a bottom surface of about φ6 mm and a height of about 4 mm, Even if the release film is sucked in vacuum, the film may not be stretched. Even if it is stretched, it does not adhere to the mold, and the LED lens as designed cannot be obtained. Further, if the release film is made thin and easily stretched, there is a problem that the release film is torn at the edge of the mold when sucked in vacuum.

On the other hand, as a release film, as shown in the following Patent Document 3, there is known a method of using a film made of a resin composition containing a crystalline aromatic polyester containing butylene terephthalate as a crystal component.

However, when a film made of a resin composition containing a crystalline aromatic polyester containing butylene terephthalate is used for the molding of an LED lens, if the release film is sucked in vacuum, it will adhere to the mold, but the yield point will be Since the film is stretched beyond the thickness, the release film is partially thinned, resulting in a problem that irregularities and wrinkles occur on the surface of the molded LED lens. In addition, addition type liquid silicone rubber is used as the silicone rubber composition, but the compound present in the release film becomes a catalyst poison of the addition type liquid silicone rubber, which inhibits curing, and The contact surface does not harden, causing a problem that the gel-like adhesive remains. For this reason, in the molding of LED lenses using addition-type liquid silicone rubber, there is no actual film that can be suitably used as a release film.

JP-A-8-142105 JP 2001-310336 A JP 2007-224311 A

The present invention has been made in view of such circumstances, and an object thereof is to provide a release film that is excellent in releasability from a mold or a molded product in the molding of an LED lens using an addition-type liquid silicone rubber. It is to provide.
Another object of the present invention is to provide a release film having excellent mold shape transferability in which the mold shape is transferred to a molded product as designed.
Moreover, the objective of this invention is providing the film for mold release from which the surface smoothness of a molded article is acquired, without a gel-like adhesive substance remaining on the surface of a molded article.
Furthermore, the objective of this invention is providing the film for mold release which has the heat resistance in the use temperature around 140 degreeC.

In order to achieve such an object, the present invention comprises a thermoplastic polyurethane elastomer containing a thermoplastic fluororesin, and the thermoplastic polyurethane elastomer comprises JIS.
A Hardness is 70 or more, Vicat softening temperature is 100 to 180 ° C., and the thermoplastic fluororesin is contained in an amount of 1 to 400 parts by mass with respect to 100 parts by mass of the thermoplastic polyurethane elastomer.

  The present invention is grasped by the following composition.

(1) The release film of the present invention has a thermoplastic fluororesin in an amount of 1 to 400 parts by mass with respect to 100 parts by mass of a thermoplastic polyurethane elastomer having a JIS A hardness of 70 or more and a Vicat softening temperature of 100 to 180 ° C. It is characterized by being comprised from the thermoplastic elastomer 2 component composition contained in the range of a part.

(2) The release film of the present invention is characterized in that, in the configuration of (1), the thermoplastic fluororesin is a thermoplastic tetrafluoroethylene copolymer having a melting point of 140 ° C. or higher and 240 ° C. or lower. To do.

(3) The mold release film of the present invention is the composition according to any one of (1) and (2), wherein the fluorine-containing alcohol compound and the fluorine-containing diol are used with respect to 100 parts by mass of the two-component thermoplastic elastomer composition. It is characterized by comprising a thermoplastic elastomer three-component composition containing one or more compounds selected from the group consisting of compounds in a range of 0.05 to 5.0 parts by mass.

(4) In the release film of the present invention, in any one of the constitutions (2) and (3), the fluorine-containing alcohol compound is a compound represented by the general formula (A), and the fluorine-containing diol The compound is a compound represented by the general formula (B).
Rf1 (CH2) mOH (A)
(In the formula, Rf1 represents a linear or branched perfluoroalkyl group or a perfluoroalkyl ether group having 3 to 20 carbon atoms, and m is an integer of 1 to 5.)
Rf2 (CH2) nOCH2CH (OH) CH2OH (B)
(In the formula, Rf2 represents a linear or branched perfluoroalkyl group having 3 to 20 carbon atoms, and n is an integer of 1 or 2.)

(5) The release film of the present invention is any one of the constitutions (1) to (4), wherein the thermoplastic elastomer two-component composition and the three-component composition are a lubricant, an anti-blocking agent, a phenol-based oxidation. It further includes one or more additives belonging to the inhibitor and the phosphorus-based antioxidant.

(6) The release film of the present invention has a tensile modulus of 10 to 500 N / th in both the film longitudinal direction (MD) and the film transverse direction (TD) in any one of the constitutions (1) to (5). characterized in that it is in the range of mm ^2.

(7) The release film of the present invention has the film longitudinal direction (MD) and the film transverse direction (TD) at 50% modulus (50% Mo) of the film in any one of the constitutions (1) to (6). The ratio (MD) / (TD) is in the range of 0.9 to 1.2.

(8) The release film of the present invention has a ratio of 50% modulus (50% Mo) to 100% modulus (100% Mo) of the film in any one of the constitutions (1) to (7) (100 % Mo) / (50% Mo) is in the range of 1.0 to 1.6 in both the film longitudinal direction (MD) and the film transverse direction (TD).

(9) In the release film of the present invention, in any one of the constitutions (1) to (8), the tensile elongation of the film exceeds 350% in both the film longitudinal direction (MD) and the film transverse direction (TD). It is characterized by.

(10) The release film of the present invention is a film made of a thermoplastic resin or a film made of a thermoplastic elastomer other than the thermoplastic polyurethane elastomer in any one of the constitutions (1) to (9). It is characterized by being comprised from the multilayer film containing.

  According to the mold release film of the present invention, it is excellent in releasability from molds and molded products, and is excellent in mold shape transferability in which the shape of the mold is transferred to the molded product as designed. The surface smoothness of the molded product can be obtained without leaving a gel-like adhesive on the surface, and heat resistance can be provided.

It is a side view of a bullet type LED lens concerning an embodiment of the present invention. (A) It is a top view of the metal mold | die of the bullet type LED lens which concerns on embodiment of this invention. (B) It is an AA arrow sectional view of Drawing 2 (a) of a metallic mold of a bullet type LED lens concerning an embodiment of the present invention. It is a figure which shows schematic structure of the film manufacturing apparatus of the film for mold release which concerns on embodiment of this invention. It is sectional drawing which shows the periphery of the material insertion hopper of the film manufacturing apparatus shown in FIG. 3 based on embodiment of this invention. It consists of Table 1 which shows the Example of this invention, and is the figure which showed Example 1 thru | or 7, its physical property, and evaluation. It consists of Table 2 which shows the Example of this invention, and is the figure which showed Example 8 thru | or 14, its physical property, and evaluation. It consists of Table 3 which shows the Example of this invention, and is the figure which showed Examples 15 thru | or 21, its physical property, and evaluation. It consists of Table 4 which shows the comparative example of this invention, and is the figure which showed the comparative examples 1 thru | or 7, its physical property, and evaluation.

  As a result of various investigations to achieve the above object, the present inventors have found that among polyurethane elastomers, the JIS A hardness is 70 or more, the specific gravity is 1.05 to 1.30, and the Vicat softening temperature is 100 to 180 ° C. A mold release film composed of a two-component thermoplastic elastomer composition containing 1 to 400 parts by mass of a thermoplastic fluororesin with respect to 100 parts by mass of a certain thermoplastic polyurethane elastomer has excellent releasability from a mold or a molded product. Excellent mold shape transferability that allows the shape of the mold to be transferred to the molded product as designed, and the surface smoothness of the molded product is obtained without leaving a gel-like adhesive on the surface of the molded product. It turns out that it can also have sex.

  The thermoplastic polyurethane elastomer in the present invention is a thermoplastic polyurethane elastomer obtained by the reaction of three components of polyisocyanate, polyol and chain extender.

  Examples of the polyisocyanate include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, xylene-1,4-diisocyanate, xylene-1,3-diisocyanate, 4,4'-diphenylmethane diisocyanate, 2 , 4'-diphenylmethane diisocyanate, 2,2'-diphenylmethane diisocyanate, 4,4'-diphenyl ether diisocyanate, 2-nitrodiphenyl-4,4'-diisocyanate, 2,2'-diphenylpropane-4,4'-diisocyanate, 3,3'-dimethyldiphenylmethane-4,4'-diisocyanate, 4,4'-diphenylpropane diisocyanate, m-phenylene diisocyanate, p-phenylene diisocyanate, naphthylene-1,4-di Aromatic diisocyanates such as socyanate, naphthylene-1,5-diisocyanate, 3,3′-dimethoxydiphenyl-4,4′-diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, dodecane diisocyanate, trimethylhexamethylene diisocyanate, lysine diisocyanate, etc. Aliphatic diisocyanates, cyclohexane diisocyanate, dicyclohexylmethane diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylene diisocyanate, hydrogenated diphenylmethane diisocyanate, tetramethylxylene diisocyanate, norbornane diisocyanate methyl, and the above isocyanates Biuret Body, dimers thereof, trimer, dimer, trimer, carbodiimide body, uretonimine body, can be mentioned adducts and the like obtained by the reaction of a bifunctional or higher functional polyols such as the isocyanate. Polyisocyanates in which a part of the isocyanate group is stabilized with a blocking agent having one active hydrogen in the molecule, such as methanol, n-butanol, benzyl alcohol, ethyl acetoacetate, ε-caprolactam, methyl ethyl ketone oxime, phenol, cresol, etc. Can be mentioned. These may be used alone or in combination of two or more.

  The above polyol is a polymer polyol having a number average molecular weight of 500 to 10,000, and examples thereof include polyester polyol, polyester amide polyol, polycarbonate polyol, polyether polyol, polyether ester polyol, and polyolefin polyol. These may be used alone or in combination of two or more.

  Examples of the polyester polyol and polyesteramide polyol described above include those obtained by a condensation reaction from polycarboxylic acid and polyol, or if necessary, in combination with diamine or amino alcohol.

  Examples of the polycarboxylic acid include oxalic acid, adipic acid, sebacic acid, dimer acid, hydrogenated dimer acid, phthalic acid, phthalic acid alkyl esters, trimellitic acid, maleic acid, fumaric acid, and itaconic acid. Can be mentioned. Further, for example, those obtained by ring-opening polymerization of cyclic esters such as butyrolactone, valerolactone and caprolactone can also be mentioned.

  Examples of the polyol include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-butanediol, Pentanediol, 2-methyl-1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, neopentyl glycol, 1,8 -Octanediol, 1,9-nonanediol, 2,2-diethyl-1,3-propanediol, 2-n-butyl-2-ethyl-1,3-propanediol, 2,2,4-trimethyl-1 , 3-pentanediol, 2-ethyl-1,3-hexanediol, 2-n-hexadecane-1,2-ethylene glycol, 2-n-ethylene Cosane-1,2-ethylene glycol, 2-n-octacosane-1,2-ethylene glycol, diethylene glycol, dipropylene glycol, 1,4-cyclohexanedimethanol, or ethylene oxide or propylene oxide adduct of bisphenol A, hydrogenation Examples thereof include low molecular polyols such as bisphenol A, 3-hydroxy-2,2-dimethylpropyl-3-hydroxy-2,2-dimethylpropionate, trimethylolpropane, glycerin, and pentaerythritol. Examples of the diamine or amino alcohol described above include low-molecular polyamines such as ethylenediamine, hexamethylenediamine, xylylenediamine, and isophoronediamine, and low-molecular aminoalcohols such as monoethanolamine, diethanolamine, and triethanolamine. it can. Examples thereof include lactone polyester polyols obtained by ring-opening polymerization of cyclic ester (lactone) monomers such as ε-caprolactone and γ-valerolactone using low molecular polyols, low molecular polyamines, and low molecular amino alcohols as initiators. it can.

  Examples of the polycarbonate polyol described above include those obtained by a dealcoholization reaction, a dephenol reaction, etc., between a low molecular polyol used for the synthesis of the polyester polyol and diethylene carbonate, dimethyl carbonate, diethyl carbonate, diphenyl carbonate and the like. it can.

  As the above-mentioned polyether polyol, polyethylene glycol, polypropylene glycol obtained by ring-opening polymerization of ethylene oxide, propylene oxide, tetrahydrofuran, etc. using low molecular polyol, low molecular polyamine, low molecular amino alcohol used as the polyester polyol as an initiator. , Polytetramethylene ether glycol and the like, polyether polyols obtained by copolymerizing these, and polyester ether polyols using the above-described polyester polyols and polycarbonate polyols as initiators.

  Examples of the polyether ester polyol described above include those obtained in the same manner as the polyester polyol, except that a polyether is used for part or all of the polyol used in the condensation reaction when the polyester polyol is obtained. .

  Examples of the polyolefin polyol include hydroxyl group-containing polybutadiene, hydrogenated hydroxyl group-containing polybutadiene, hydroxyl group-containing polyisoprene, hydrogenated hydroxyl group-containing polyisoprene, hydroxyl group-containing chlorinated polypropylene, and hydroxyl group-containing chlorinated polyethylene.

  The chain extender is an active hydrogen-containing compound having a number average molecular weight of less than 500, and examples thereof include the low molecular polyols, the low molecular polyamines, and the low molecular amino alcohols.

  For the production of the thermoplastic polyurethane elastomer used in the present invention, a known production method such as a one-shot method, a prepolymer method, a batch reaction method, a continuous reaction method, a kneader method, a method using an extruder, or the like is used. Can be adopted.

  The thermoplastic polyurethane elastomer has a JIS A hardness of 70 or more as measured by the test method of JIS K 7311. Furthermore, when the JIS A hardness is 100 or more, it is preferable that the D hardness is applied and the upper limit is 80 or less of the D hardness. The JIS A hardness is preferably 80 or more, more preferably 90 or more. Temporarily, when JIS A hardness is less than 70, rubber property becomes strong, and when the release film is transported in the molding apparatus, it can be confirmed that the release film is stretched and the transport is not stable. Moreover, when D hardness exceeds 80, the malfunction which the gel originating in 3 components of a raw material polyisocyanate, a polyol, and a chain extension agent generate | occur | produces at the time of extrusion molding can be confirmed.

  The Vicat softening temperature of the thermoplastic polyurethane elastomer is measured by the test method of JIS K7206 and is in the range of 100 to 180 ° C. The Vicat softening temperature is preferably 110 to 180 ° C, more preferably 120 to 180 ° C, and still more preferably 130 to 180 ° C. If the Vicat softening temperature is less than 100 ° C., it can be confirmed that the film is welded to the silicone rubber during use and the peelability is lowered. The upper limit of the Vicat softening temperature is 180 ° C. This is because a thermoplastic polyurethane elastomer having a Vicat softening temperature exceeding 180 ° C. cannot be obtained.

The thermoplastic fluororesin used in the present invention is a thermoplastic tetrafluoroethylene copolymer. Examples of the thermoplastic tetrafluoroethylene-based copolymer include a copolymer of tetrafluoroethylene and a comonomer copolymerizable with tetrafluoroethylene. Examples of the comonomer include olefins such as ethylene, propylene and butylene, fluoroethylenes such as CF2 = CH2 and CF2 = CFCl, fluoropropylenes such as CF2 = CFCF3 and CF2 = CHCF3, CF3CF2CF2CF2CH = CH2, CF3CF2CF2CF2CF = CH2 and the like Perfluoroalkylethylenes having 4 to 12 carbon atoms, R ^f (OCFXCF 2) mOCF═CF 2 (wherein R ^f is a perfluoroalkyl group having 1 to 6 carbon atoms, X is a fluorine atom or And a perfluorovinyl ether group such as a fluoromethyl group and m represents an integer of 0 to 5. These comonomers can be used alone or in combination of two or more.

  Specific examples of the thermoplastic tetrafluoroethylene copolymer include, for example, ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoro (propyl vinyl ether) copolymer. Examples thereof include a polymer, a tetrafluoroethylene-vinylidene fluoride copolymer, a tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer, and the like. These thermoplastic tetrafluoroethylene copolymers preferably have a melting point of 140 ° C. or higher and 240 ° C. or lower. If the melting point is less than 140 ° C., it can be confirmed that the film melts in the mold when used as a release film. Further, when a tetrafluoroethylene copolymer having a melting point exceeding 240 ° C. is used, it is possible to confirm a problem that an unmelted product remains in the film without melting in the molding temperature range of the thermoplastic polyurethane elastomer.

  The thermoplastic fluororesin described above is mixed for the purpose of imparting peelability to the film from a mold or a molded product. The mixing amount of the thermoplastic fluororesin is 1 to 400 parts by mass with respect to 100 parts by mass of the thermoplastic polyurethane elastomer, preferably 5 to 300 parts by mass, more preferably 10 to 200 parts by mass, and still more preferably 10 to 10 parts by mass. The range is 100 parts by mass. If the mixing amount is less than 1 part by mass, it can be confirmed that the mixing effect is not achieved and the peelability is not improved. When the amount exceeds 400 parts by mass, the thermoplastic fluororesin is not uniformly dispersed in the thermoplastic polyurethane elastomer, and the influence of the yield point on the tensile properties of the thermoplastic fluororesin when the film is stretched. In response to this, it is possible to confirm that the film is wrinkled.

  Thus, a release film comprising a thermoplastic elastomer two-component composition obtained by mixing a thermoplastic fluororesin with a thermoplastic polyurethane elastomer is excellent in releasability from a mold or a molded product, and also has a mold shape. Is excellent in mold shape transferability to be transferred to a molded product as designed, and can also have heat resistance. Further, when the film after production is subjected to an aging treatment in which the film is kept in an atmosphere at 40 ° C. for 60 days or more, the catalyst poison for the addition-type liquid silicone rubber disappears, and the molded product is not left on the surface of the molded product. It can be confirmed that the surface smoothness is obtained.

  Here, in the present invention, a fluorine-containing alcohol compound and a fluorine-containing diol are added to the thermoplastic elastomer two-component composition in order to shorten the aging period required for the release film comprising the thermoplastic elastomer two-component composition. A compound selected from the group consisting of can be mixed.

  The fluorine-containing alcohol compound is represented by Rf1 (CH2) mOH as the general formula (A) (wherein Rf1 represents a linear or branched perfluoroalkyl group or perfluoroalkyl ether group having 3 to 20 carbon atoms). , M is 1 to 5.). Specific examples thereof include, for example, C6F13CH2OH, C7F15CH2OH, C8F17CH2OH, C8F17CH2CH2OH, C9F19CH2CH2OH, C10F21CH2CH2OH, (CF3) 2CF (CF2) 8CH2CH2OH, CF3CF2CF2CF3CF2CF3CF2CF3CF In this case, it is preferable to use C6F13CH2OH, C7F15CH2OH, C8F17CH2OH, C8F17CH2CH2OH, C9F19CH2CH2OH, C10F21CH2CH2OH containing a linear perfluoroalkyl group.

  Moreover, said fluorine-containing diol compound is Rf2 (CH2) nOCH2CH (OH) CH2OH as a general formula (B) (In formula, Rf2 represents a C3-C20 linear or branched perfluoroalkyl group, n is an integer of 1 or 2.). Specific examples thereof include C6F13CH2CH2OCH2CH (OH) CH2OH, C7F15CH2CH2OCH2CH (OH) CH2OH, C8F17CH2CH2OCH2CH (OH) CH2OH, C9F19CH2CH2OCH2CH2OH (CH) CH2OH, C10F21CH2CH2CH2OH (CF) CH2OH Etc. In this case, C6F13CH2CH2OCH2CH (OH) CH2OH containing a linear perfluoroalkyl group, C7F15CH2CH2OCH2CH (OH) CH2OH, C8F17CH2CH2OCH2CH (OH) CH2OH, C9F19CH2CH2OCH2CH (OH) CH2OH, C10F21CH2CH2OH is preferred.

  Such fluorine-containing alcohol compounds and fluorine-containing diol compounds (hereinafter abbreviated as fluorine-containing alcohol compounds / diol compounds) react with polyisocyanate, which is a raw material for thermoplastic polyurethane elastomers. In a film made of a thermoplastic polyurethane elastomer, polyisocyanate, which is a constituent component thereof, may remain, and this may become a catalyst poison of the addition type liquid silicone rubber and cause inhibition of curing. From this, when a fluorine-containing alcohol-based compound / diol compound is mixed with a thermoplastic polyurethane-based elastomer, it reacts with polyisocyanate to bond a perfluoroalkyl group to the main skeleton of the elastomer, thereby eliminating the catalyst poison. By this action, if the film is formed by mixing a fluorine-containing alcohol compound / diol compound with a thermoplastic elastomer two-component composition, the catalyst poison disappears by performing an aging treatment for 3 days or more in an atmosphere of 40 ° C., In the molding of the addition-type liquid silicone rubber composition, no inhibition of curing occurs, and no gel-like adhesive remains on the surface of the molded product. Therefore, in the release film comprising the thermoplastic elastomer ternary composition of the present invention, the aging period is shortened, that is, the lead time is shortened, the space necessary for aging is reduced, and the energy cost required for aging is reduced. Play.

  The mixing amount of one or a plurality of compounds selected from the group consisting of such fluorine-containing alcohol compounds and fluorine-containing diol compounds is 0.05 to 5.5 with respect to 100 parts by mass of the thermoplastic elastomer two-component composition. The range is 0 part by mass, preferably 0.1 to 4.0 parts by mass, and more preferably 0.1 to 3.0 parts by mass. If the mixing amount is less than 0.05 parts by mass, the mixed effect cannot be obtained. Moreover, even if it exceeds 5.0 parts by mass, the effect does not increase, and furthermore, these fluorine-containing alcohol compounds and diol compounds remain unreacted and bleed out on the film surface to contaminate the surface of the molded product. You can check the malfunctions.

  When the above-mentioned fluorine-containing alcohol-based compound / diol compound is mixed into the thermoplastic elastomer two-component composition, since lubricity is also imparted to the film surface, the effect of smoothly transporting the release film in the molding apparatus, The effect of preventing wrinkles of the release film when contacting the mold and the effect of improving the peelability from the silicone rubber composition used as a sealing material are added.

  There are many compounds that can be reacted with the polyisocyanate remaining in the thermoplastic polyurethane-based elastomer described above, in addition to the above-mentioned fluorine-containing alcohol-based compound / diol compound. In addition, there are hydroxyl groups in the molecule such as alcohol-based compounds and diol-based compounds. And a compound having a carboxylic acid in the molecule. These compounds can be used in place of the fluorine-containing alcohol-based compound / diol compound as long as the characteristics of the present invention are not impaired.

  The above-mentioned thermoplastic elastomer two-component composition and three-component composition (hereinafter referred to as the thermoplastic elastomer composition together) are mixed with other thermoplastic elastomers within the range that does not impair the characteristics of the present invention. can do. Examples of the thermoplastic elastomer include polyester elastomers, polyamide elastomers, polyvinyl chloride elastomers, styrene elastomers, and olefin elastomers.

  In the above-mentioned thermoplastic elastomer composition, for example, a lubricant such as polyethylene wax and amide wax, an antiblocking agent such as silica, a phenolic antioxidant, and a phosphorous antioxidant, as long as the characteristics of the present invention are not impaired. An agent or the like can be mixed.

  The release film comprising the thermoplastic elastomer composition of the present invention can be suitably used as a single-layer film, but within the range not impairing the characteristics of the present invention, a film made of a thermoplastic resin or other thermoplastic elastomer, etc. Two or more multilayer films can also be formed and used. What is necessary is just to form the film which consists of a thermoplastic elastomer composition of this invention as a mold release layer which contacts a silicone rubber, when setting it as a multilayer film. Examples of the thermoplastic resin include polybutylene terephthalate resin, polyethylene terephthalate resin, cyclic polyolefin resin, syndiotactic polystyrene resin, polymethylpentene resin, polymethyl methacrylate resin, polyethylene resin, polypropylene resin, polystyrene resin, and polyvinyl acetate resin. And acrylonitrile butadiene styrene resin and acrylonitrile styrene resin. Examples of other thermoplastic elastomers include polyester elastomers, polyamide elastomers, polyvinyl chloride elastomers, styrene elastomers, and olefin elastomers. Another example of the material is ethylene copolymer rubber. As a method for forming the multilayer film, for example, a conventionally known method such as a co-extrusion method, an extrusion lamination method, or a coating method can be appropriately selected and used.

The release film in the present invention has a tensile elastic modulus of 10 measured in accordance with JIS Z 1702 at a temperature of 23 ° C. and a tensile speed of 100 mm / min in both the film longitudinal direction (MD) and the film transverse direction (TD). The range is from 0.0 to 500 N / mm ² . This tensile modulus is preferably in the range of 30.0 to 450 N / mm ² , more preferably in the range of 50.0 to 400 N / mm ² . If the tensile modulus is less than 10.0 N / mm ² , it can be confirmed that the film is weak and loose when the release film is pulled out from the wound body in the molding apparatus. Moreover, when a tensile elasticity modulus exceeds 500 N / mm < ² >, when the film for mold release is attracted | sucked in a vacuum in a metal mold | die, the malfunction which a film does not expand | extend and can be confirmed cannot be confirmed.

  In the present invention, the release film is a film longitudinal direction (MD) and a film transverse direction (50% modulus (50% Mo) of the film measured at a temperature of 23 ° C. and a tensile speed of 100 mm / min in accordance with JIS Z 1702. The ratio (MD) / (TD) to TD) is in the range of 0.90 to 1.20, preferably in the range of 0.95 to 1.20. (MD) / (TD) is never less than 0.90 in a film formed by an extrusion method. And when (MD) / (TD) exceeds 1.20, when the film for mold release is supplied to a metal mold | die in a molding apparatus, the malfunction which a wrinkle generate | occur | produces can be confirmed.

  The release film in the present invention is a ratio of 50% modulus (50% Mo) to 100% modulus (100% Mo) of a film measured at a temperature of 23 ° C. and a tensile speed of 100 mm / min according to JIS Z 1702 ( 100% Mo) / (50% Mo) is in the range of 1.00 to 1.60, preferably in the range of 1.00 to 1.50 for both the film longitudinal direction (MD) and the film transverse direction (TD). It is. If (100% Mo) / (50% Mo) is less than 1.00, no increase in stress associated with an increase in film elongation occurs, so a uniform film elongation cannot be obtained, and a release film is obtained. It is possible to confirm a problem that wrinkles occur when sucked in vacuum in the mold. Further, when (100% Mo) / (50% Mo) exceeds 1.60, the increase in stress accompanying the increase in film elongation is large, and the film is fully extended until the release film is in close contact with the inner surface of the mold. There can be no bugs.

  In the release film of the present invention, the tensile elongation of the film measured at a temperature of 23 ° C. and a tensile speed of 100 mm / min in accordance with JIS Z 1702 is 350% in both the film longitudinal direction (MD) and the film transverse direction (TD). That's it. This tensile elongation is preferably 400% or more. If the tensile elongation is less than 350%, it can be confirmed that the release film is cut at the edge of the mold when sucked in vacuum in the mold.

  The thermoplastic elastomer two-component composition according to the present invention comprises (1) a thermoplastic polyurethane elastomer and a thermoplastic fluororesin that are stirred and mixed at a temperature below the melting point of the thermoplastic polyurethane elastomer, and then the thermoplastic polyurethane elastomer. It can be produced by melt-kneading at a temperature higher than the melting point.

  As another method, (2) a thermoplastic polyurethane elastomer, a thermoplastic fluororesin, and a fluorine-containing alcohol compound / diol compound are stirred and mixed at a temperature below the melting point of the thermoplastic polyurethane elastomer, and then the thermoplastic polyurethane It can be produced by melt-kneading at a temperature higher than the melting point of the elastomer. Further, as another method, (3) a thermoplastic polyurethane-based elastomer and a thermoplastic fluororesin are stirred and mixed and then melted at a temperature equal to or higher than the melting point of the thermoplastic polyurethane-based elastomer. It can be prepared by adding a compound and melt-kneading. These methods (1), (2), and (3) can be appropriately selected and used.

  In addition, stirring mixing of thermoplastic polyurethane elastomer and thermoplastic fluororesin, and stirring mixing by adding fluorine-containing alcohol compound / diol compound to them, tumbler mixer, Henschel mixer, ribbon blender or universal stirring mixer, etc. Can be carried out using a known mixer.

  The production of the thermoplastic elastomer two-component composition (1) and the production of the thermoplastic elastomer three-component composition (2) are carried out by using the stirring mixture produced by the above-described method as a single screw extruder, a twin screw extruder, or the like. This is performed by melt-kneading using an extruder. The temperature of the extruder when producing the thermoplastic elastomer two-component composition and the three-component composition is not lower than the melting point of the thermoplastic polyurethane elastomer and not higher than 240 ° C.

  In the case of (3) above, after the stirred mixture of the thermoplastic polyurethane elastomer and the thermoplastic fluororesin is melted by an extruder such as a single screw extruder or a twin screw extruder, the fluorine-containing alcohol compound A diol compound may be added and melt kneaded to produce a thermoplastic elastomer three-component composition. The temperature of the extruder when producing this thermoplastic elastomer three-component composition is not lower than the melting point of the polyurethane elastomer and not higher than 240 ° C.

  When a thermoplastic elastomer composition is produced using an extruder such as a single-screw extruder or a twin-screw extruder, it exists in the voids in the extruder and between the compositions as in the case of forming a film described later. You may melt-knead in the inert gas atmosphere which substituted air with the inert gas.

  Usually, a thermoplastic elastomer composition is processed into a powder, granule, or pellet by a pulverizer or a cutting machine.

The release film comprising the thermoplastic elastomer composition described above can be formed by a conventionally known method such as a melt extrusion method or a melt cast method.
In the following example, a method for forming a release film by a melt extrusion method using a T-die will be described.

  The release film obtained by such a method uses a molding material of the thermoplastic elastomer composition, an extruder such as a single-screw extruder or a twin-screw extruder, according to the characteristics of the thermoplastic elastomer composition. In an atmosphere where the air in the gap between the extruder and the molding material is replaced with nitrogen gas, it is melt-kneaded and the release film melt-extruded from the lip portion at the tip of the T die placed at the tip of the extruder is taken up. Cool by pinching directly between the crimping roll and the cooling roll in the machine, or by inserting a separator from both or one side of the crimping roll and the cooling roll, and then cooling it. It is obtained by winding up sequentially.

  FIG. 3 is a configuration diagram showing an outline of a film production apparatus for producing a release film by the above-described method. 4 is a cross-sectional view of the periphery of the material charging hopper of the film manufacturing apparatus shown in FIG. In FIG. 3, the film manufacturing apparatus is generally configured to include a material charging hopper 2, an extruder 1, a T die 7, a take-up machine 11, and a winder 15. The material charging hopper 2 is configured to input a molding material, and as shown in FIG. 4, the nitrogen gas supply pipe 3 is connected to the extruder 1 of the material charging hopper 2 through the spacer 3a while being connected to the extruder 1. Inserted. The nitrogen gas supply pipe 3 is bent so as to be substantially along the central axis of the material charging port 1 c, and the tip thereof extends to the vicinity of the outer periphery of the extrusion screw 1 a in the extruder 1. Oxygen contained in the molding material fed from the material feeding hopper 2 or in the extruder 1 is supplied to the nitrogen gas supply pipe 3 when the molding material is mixed and stirred by the extrusion screw 1a of the extruder 1. It is designed to be replaced with nitrogen gas.

  The extruder 1 mixes and stirs the molding material with the extrusion screw 1a, conveys it in the direction of arrow B, and heats and melts the molding material by electric heating means (not shown) incorporated in the cylinder 1b of the extruder 1. To do. The molding material thus melted and conveyed is fed to the filter means 5 through the connecting pipe 4 shown in FIG. The unmelted molding material is separated by the filter means 5 and the molten molding material is fed to the gear pump 6. In the gear pump 6, the molten molding material is pushed out to the T die 7 while increasing the pressure of the molten molding material. In the T die 7, the melt molding material is extruded at a predetermined pressure, and a film 8 having a predetermined thickness and a predetermined width is formed from the lip portion 7 a of the T die 7. The film 8 formed in this manner is adjusted to a predetermined thickness by the pressure-bonding roll 9 while being drawn on the outer peripheral surface of the cooling roll 10 of the take-up machine 11, and further cooled and solidified. It is conveyed to the winder 15.

  In the winder 15, the film 8 is guided by the guide rolls 15 a, 15 b, and 15 c and is wound by the winding tube 16. In addition, a thickness measuring device 14 is disposed between the conveying roll pairs 12 and 13 and the guide roll 15a, and the thickness measured by the thickness measuring device 14 is set so as to obtain a desired thickness. Based on this, the peripheral speed of the cooling roll 10 is adjusted and controlled. Thereby, the release film is formed.

  The release film may be formed in the surface shape of the film according to the surface shape required by the molded product. For example, when the surface of the LED or the like is a mirror surface, it may be formed so that the surface of the release film is a mirror surface. In addition, since ICs, LSIs, and the like form fine irregularities on the surface, the surface of the release film may be formed so as to have fine irregularities.

  When the surface of the mold release film is mirror-finished, the surface of the metal cooling roll described above is made mirror-finished, and the mold release film in a molten state is pressure-bonded to the cooling roll with a pressure-bonding roll. What is necessary is just to level the surface of a film in a mirror surface. When a separator is used, a method of using a mirror-finished PET film or OPP film as the separator and transferring the surface thereof can be employed.

  When forming fine irregularities on the surface of the release film, fine irregularities are formed on the outer peripheral surface of the metal cooling roll described above, and the release film in a molten state is pressure-bonded to the cooling roll. What is necessary is just to transfer the fine unevenness | corrugation formed in the outer peripheral surface of a cooling roll to the film surface for mold release, when crimping | bonding with a roll. Moreover, when using a separator, the method of using the PET film and OPP film which carried out the mat | matte processing on the surface as a separator, and transferring the surface can be employ | adopted.

  When the surface of the release film is a mirror surface, the surface roughness is measured at a speed of 0.6 mm / second, a cutoff value of 0.8 mm, and an evaluation length of 8.0 mm in accordance with JIS B0601-2001. The surface may be appropriately formed so that the arithmetic average roughness Ra is 0.10 or less and the maximum height roughness Rz is 1.00 or less. When the arithmetic average roughness Ra is 0.10 or less and the maximum height roughness Rz is 1.00 or less, the surface of the molded product to which the surface of the release film is transferred becomes smooth.

  When fine irregularities are formed on the surface of the release film, the arithmetic average roughness Ra measured by the same method as described above is 0.5 or more, and the maximum height roughness Rz is 5.00 or more. The surface may be appropriately formed so that

  The release film of the present invention has a thickness in the range of 5 μm to 500 μm, preferably in the range of 10 μm to 400 μm, and may be appropriately selected according to the shape of the mold to be used. If the thickness of the mold release film is less than 5 μm, when following the mold during use, the mold release film will be stretched and thinned, or may be broken by the pressure of the sealing material. Since it occurs, it is not preferable. In addition, when the thickness of the release film exceeds 500 μm, the thickness becomes an obstacle, it is impossible to follow the mold having a fine structure, and the complicated shape of the mold cannot be transferred to the molded product. Is not preferable.

Hereinafter, Examples 1 to 21 of the release film of the present invention will be described with reference to FIG. 5 (Table 1), FIG. 6 (Table 2), and FIG. 7 (Table 3). FIG. 5 (Table 1), FIG. 6 (Table 2), and FIG. 7 (Table 3) show the materials, release film physical properties, and evaluation of the release films of Examples 1 to 21, respectively. Yes. The release film according to the present invention is not limited to Examples 1 to 21.
Here, the thermoplastic polyurethane elastomer 1, thermoplastic polyurethane elastomer 2, thermoplastic fluororesin 1, thermoplastic fluororesin 2, fluorine-containing alcohol compound / diol compound 1 and fluorine-containing alcohol system shown in Tables 1 to 3 The compound / diol compound 2 uses the following materials. Here, 1 and 2 attached to the end of the material indicate types.

(Thermoplastic polyurethane elastomer 1)
Miractolan E598PNAT: trade name, manufactured by Nippon Polyurethane Industry Co., Ltd., JIS A hardness 98, Vicat softening temperature 141 ° C
(Thermoplastic polyurethane elastomer 2)
Miractolan E559PNAT: trade name, manufactured by Nippon Polyurethane Industry Co., Ltd., JIS D hardness 59, Vicat softening temperature 143 ° C
(Thermoplastic fluororesin 1)
Dyonion THV500GZ: trade name, manufactured by Sumitomo 3M Limited, tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer, melting point 165 ° C.
(Thermoplastic fluororesin 2)
DIONION THV610GZ: trade name, manufactured by Sumitomo 3M Limited, tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer, melting point 185 ° C.
(Fluorine-containing alcohol compound / diol compound 1)
F-top MF-100: trade name, manufactured by Mitsubishi Materials Corporation, 3- (2-perfluorohexylethoxy) -1,2-dihydroxypropane (C6F13CH2CH2OCH2CH (OH) CH2OH)
(Fluorine-containing alcohol compound / diol compound 2)
F-top PDFOH: Trade name, manufactured by Mitsubishi Materials Corporation, pentadecafluorooctanol (C7F15CH2OH)

  Hereinafter, based on Tables 1 to 3, production of a release film, peelability, heat resistance, mold shape transferability, presence / absence of gel-like adhesive, surface smoothness, and actual usability will be described in detail. In addition, the content mentioned above of Table 1-Table 3 is applied similarly in Comparative Examples 1-7 of FIG. 8 (Table 4).

(Preparation of release film)
The thermoplastic elastomer composition was supplied to a single screw extruder (manufactured by IK Corporation) having a diameter of 40 mm and L / D = 25, and a cylinder temperature of 180 ° C. or higher was used using a full flight extrusion screw having a compression ratio of 2.5. The mixture was melt-kneaded under a condition of 210 ° C. and continuously extruded from a T die having a width of 400 mm under a condition of a die temperature of 210 ° C. to 220 ° C. In the take-off machine, the extruded release film is supplied from the pressure-rolling roll side as a mat-processed PET film as a separator and from the cooling roll side as a mirror-finished PET film as a separator, and is sandwiched between the pressure-rolling roll cooling rolls. The thicknesses shown in Table 1 to Table 3 (thicknesses in Tables 1 to 3 are shown in Table 1 to Table 3). In this case, a release film having a width of 250 mm and a length of 50 m was produced. These release films were aged in the atmosphere of 40 ° C. for the periods described in the examples (Tables 1 to 3) and the comparative examples (Table 4). After the aging was completed, the release film was rewound while peeling off the separator mat-processed PET film and the mirror-processed PET film to obtain a release film for evaluation.

(Method of evaluation)
Evaluation is performed using a mold having the shape of the lens shown in FIG. 1, and after a release film is adsorbed to the mold, the silicone rubber composition is dropped and hot press-molded, peelability and heat resistance. The mold shape transferability, the presence or absence of a gel-like adhesive, and the surface smoothness were evaluated. In FIG. 1, reference numeral 20 indicates a bullet-type LED lens, and reference numerals 21a and 21b indicate lead wires. The diameter of the bullet-type LED lens 20 was, for example, φ6 mm, and the height was, for example, 4 mm. 2 shows a mold (denoted by reference numeral 30 in the figure), (a) is a plan view, and (b) is a cross-sectional view taken along line AA of (a). On the surface of the mold, 5 × 5 lens molding concave portions (indicated by reference numeral 31 in the figure) corresponding to the shape of the bullet-type LED lens are provided. The distance between the central axes of adjacent lens molding recesses is, for example, 8 mm.

The release film is stretched over the mold shown in FIG. 2 so that the matte surface of the release film is on the mold side and the mirror surface is on the air side. Adsorbed. Next, a silicone rubber composition OE-6636 is formed on the release film.
(Trade name, manufactured by Toray Dow Corning Co., Ltd.) was dropped, and a flat mold whose surface was hard chrome-plated was pressed against this, and was sandwiched between the two molds and subjected to hot press molding. Evaluates the peelability of the molded laminate from the release film and the cured silicone rubber, the heat resistance of the release film, the mold shape transferability of the cured silicone rubber, the presence of gel-like adhesives, and the surface smoothness did. Hot press molding was performed under conditions of a temperature of 140 ° C. and a pressure of 10 kg / cm ² for 5 minutes.

(Peelability)
Evaluation of releasability (in Tables 1 to 3, evaluation, releasability) is “Good” when the molded silicone rubber composition can be peeled without remaining on the release film, and the silicone rubber composition Was partially broken and remained on the release film, it was indicated as “NG”.

(Heat-resistant)
Evaluation of heat resistance (in Table 1 to Table 3, evaluation, heat resistance) is to visually observe the release film from which the molded silicone rubber composition has been peeled off, and maintain the film shape without melting or fusing. “Good” was indicated when the film was released, and “NG” was indicated when the release film was melted or melted.

(Mold shape transferability)
Mold shape transferability (in Tables 1 to 3, evaluation, item of mold shape transferability) was evaluated by measuring the dimensions of the molded silicone rubber composition. The lens height evaluation criteria is further within a range of -0.1 mm from the dimension obtained by reducing the thickness of the release film for a hole depth of 4 mm, that is, ((4-release film thickness) -0. 1) It was set to mm or more. When all the 25 lenses are within the standard, “Good” is indicated, and when one lens does not satisfy the standard, “NG” is indicated.

(Presence or absence of gel-like adhesive)
The presence or absence of the gel-like adhesive (in Tables 1 to 3, the evaluation, the presence or absence of the gel-like adhesive) was confirmed by touching the surface of the molded silicone rubber composition with a finger. The silicone rubber surface was evaluated as “Good” when there was no sticky feeling when the finger was removed and no fingerprint was attached, and “NG” when the surface was sticky and the finger was attached when the finger was released.

(Surface smoothness)
For surface smoothness (in Tables 1 to 3, evaluation and surface smoothness terms), the surface state of the molded silicone rubber composition was visually evaluated. The case where there was no unevenness or wrinkles on the surface of the silicone rubber was indicated as “Good”, and the case where there was unevenness or wrinkles was indicated as “NG”.

(Actual usability)
The actual usability was confirmed and evaluated by resin molding with a molding apparatus. Specifically, OE-6636 (trade name, manufactured by Toray Dow Corning Co., Ltd.) was used as a silicone rubber composition in a molding apparatus G-LINE manual press (trade name) manufactured by Apic Yamada as a molding device. Usability was confirmed visually.

  The evaluation of actual usability (in Tables 1 to 3, the evaluation and actual usability items) are supplied without the film loosening when the release film is transported in the molding apparatus, and the film is used for adsorption. There is no generation of wrinkles, and after heat press molding, the release film and the silicone rubber composition have good releasability, and the surface of the cured silicone rubber composition has no irregularities or wrinkles and is a smooth, gel-like adhesive. The state in which the mold release film was not torn or melted, the silicone rubber composition was not left and the mold was not soiled was indicated as “Good”, and the case where any defect was found was indicated as “NG”.

  From these results, in Comparative Example 1 (see Table 4), the mixing amount of the thermoplastic fluororesin of the thermoplastic elastomer two-component composition was less than the mixing amount of the present invention. Usability was not satisfied. In Comparative Example 2 (see Table 4), the thermoplastic fluororesin of the thermoplastic elastomer two-component composition was mixed in excess of the mixing amount of the present invention, but wrinkles were generated when the film was adsorbed in the mold. The product was transferred to the surface of the molded product, and surface smoothness was not obtained. In Comparative Example 3 (see Table 4), the mixing amount of the thermoplastic fluororesin of the thermoplastic elastomer three-component composition and the mixing amount of the fluorine-containing alcohol-based compound / diol compound were less than the mixing amount of the present invention. Was not obtained and the actual usability was not satisfied. In Comparative Example 4 (see Table 4), the thermoplastic fluororesin of the thermoplastic elastomer three-component composition and the fluorine-containing alcohol compound / diol compound were mixed in excess of the mixing amount of the present invention. When adsorbed, wrinkles were generated and transferred to the surface of the molded product, surface smoothness could not be obtained, and there was a problem that oil bleeded out from the release film adhered to the surface of the molded product. In Comparative Example 5 (see Table 4), an ETFE film manufactured by Asahi Glass Co., Ltd. and Aflex (trade name) having a thickness of 100 μm were used as comparative objects. However, the mold shape transferability was inferior, and actual useability was not obtained. . In Comparative Example 6 (see Table 4), an ETFE film manufactured by Asahi Glass Co., Ltd. and Aflex (trade name) with a thickness of 25 μm were used for comparison, but the film was broken when adsorbed in the mold, and was actually used. Sex was not obtained. In Comparative Example 7 (see Table 4), a thickness composed of Hytrel 5577 (trade name) manufactured by Toray DuPont, polyester / polyether copolymer, D hardness 55, and a thermoplastic elastomer composition having a Vicat softening temperature of 192 ° C. A 50 μm release film was used for comparison. Wrinkles were generated on the surface of the molded article made of the silicone rubber composition, the surface smoothness was inferior, and there was also a gel-like pressure-sensitive adhesive.

  On the other hand, the release films of Examples 1 to 21 (Tables 1 to 3) according to the present invention have heat resistance and excellent mold shape transferability in addition to being capable of being peeled. It becomes clear that surface smoothness is obtained without leaving a sticky adhesive, and that practical usability is imparted. From this, according to the present invention, it is possible to obtain a release film that is excellent in releasability from a molded product obtained by molding a sealing material and that can provide a molded product having excellent shape and surface properties. it can.

  As mentioned above, although this invention was demonstrated using embodiment, it cannot be overemphasized that the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the scope of the claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Extruder, 2 ... Material injection hopper, 3 ... Nitrogen gas supply pipe, 4 ... Connection pipe, 5 ... Filter, 6 ... Gear pump, 7 ... T die, 7a ... Lip part, 8 ... Film, 9 ... Crimp roll, 10 ... Cooling roll, 11 ... Take-up machine, 12, 13 ... Conveying roll pair, 14 ... Thickness measuring device, 16 ... Winding tube, 17a, 17b ...... Feeding roll, 18a, 18b .... Separator, 20 ... Cannonball type LED lens, 21a, 21b ... Lead wire, 30 ... Mold mold, 31 ... Lens molding recess.

Claims (10)

  Thermoplastic elastomer 2 containing thermoplastic fluororesin in the range of 1 to 400 parts by mass with respect to 100 parts by mass of thermoplastic polyurethane elastomer having a JIS A hardness of 70 or more and a Vicat softening temperature of 100 to 180 ° C. A release film comprising a component composition.   The release film according to claim 1, wherein the thermoplastic fluororesin is a thermoplastic tetrafluoroethylene copolymer having a melting point of 140 ° C or higher and 240 ° C or lower.   The range of 0.05 to 5.0 parts by mass of one or more compounds selected from the group consisting of fluorine-containing alcohol compounds and fluorine-containing diol compounds with respect to 100 parts by mass of the thermoplastic elastomer two-component composition The release film according to claim 1, comprising a three-component thermoplastic elastomer composition contained in The fluorine-containing alcohol compound is a compound represented by the general formula (A), and the fluorine-containing diol compound is a compound represented by the general formula (B). The film for mold release according to crab.
Rf1 (CH2) mOH (A)
(In the formula, Rf1 represents a linear or branched perfluoroalkyl group or a perfluoroalkyl ether group having 3 to 20 carbon atoms, and m is an integer of 1 to 5.)
Rf2 (CH2) nOCH2CH (OH) CH2OH (B)
(In the formula, Rf2 represents a linear or branched perfluoroalkyl group having 3 to 20 carbon atoms, and n is an integer of 1 or 2.)   The thermoplastic elastomer two-component composition and the three-component composition further include one or more additives belonging to a lubricant, an anti-blocking agent, a phenol-based antioxidant, and a phosphorus-based antioxidant. Item 5. A release film according to any one of Items 1, 2, 3, and 4. The film for mold release according to any one of claims 1 to 5, wherein the film has a tensile modulus of elasticity in the range of 10 to 500 N / mm ² in both the film longitudinal direction (MD) and the film transverse direction (TD). .   The ratio (MD) / (TD) of film longitudinal direction (MD) and film transverse direction (TD) at 50% modulus (50% Mo) of the film is in the range of 0.9 to 1.2. The release film according to any one of claims 1 to 6.   The ratio (100% Mo) / (50% Mo) of 50% modulus (50% Mo) to 100% modulus (100% Mo) of the film is 1. in both the film longitudinal direction (MD) and the film transverse direction (TD). The release film according to any one of claims 1 to 7, wherein the film is in a range of 0 to 1.6.   The film for mold release according to any one of claims 1 to 8, wherein the tensile elongation of the film exceeds 350% in both the film longitudinal direction (MD) and the film transverse direction (TD).   The mold release according to any one of claims 1 to 9, comprising a film made of a thermoplastic resin or a multilayer film including a film made of a thermoplastic elastomer other than the thermoplastic polyurethane elastomer. Film.

Images