WO2018037991A1 - 離型フィルム - Google Patents
離型フィルム Download PDFInfo
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- WO2018037991A1 WO2018037991A1 PCT/JP2017/029527 JP2017029527W WO2018037991A1 WO 2018037991 A1 WO2018037991 A1 WO 2018037991A1 JP 2017029527 W JP2017029527 W JP 2017029527W WO 2018037991 A1 WO2018037991 A1 WO 2018037991A1
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- WIPO (PCT)
- Prior art keywords
- release
- layer
- film
- mass
- release film
- Prior art date
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Classifications
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
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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
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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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- 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
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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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
- B32B27/42—Layered products comprising a layer of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
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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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/03—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers with respect to the orientation of features
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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
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
- B32B2307/518—Oriented bi-axially
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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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/538—Roughness
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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
- B32B2307/70—Other properties
- B32B2307/748—Releasability
Definitions
- the present invention relates to a release film. Specifically, the present invention relates to a release film using a non-silicone compound.
- the release film is used for the purpose of protecting the surface of the pressure-sensitive adhesive layer used in the manufacturing process of precision electronic devices such as ceramic capacitors, hard disk drives, and semiconductor devices.
- the release film is also used as a carrier film when manufacturing an adhesive sheet.
- the release film is used as a carrier film when molding a green sheet, an optical resin sheet, or the like.
- the release film is usually provided with a release layer for the purpose of improving peelability.
- Silicone compounds are generally used for the release layer of the release film, but when silicone compounds are used for applications related to precision electronic equipment, etc., the low molecular weight silicone compounds contained in the release layer adhere to each other. There is a concern that it will migrate to the agent layer and remain in precision electronic equipment, causing trouble in precision electronic equipment.
- a release film using a non-silicone compound for the release layer is known.
- non-silicone compounds for example, long chain alkyl compounds, olefin resins, fluorine resins, and rubber release agents are known.
- a release film using a non-silicone compound for the release layer may be referred to as a “non-silicone release film”.
- Patent Document 1 It has been proposed to reduce the center plane average roughness SRa of the surface of the release layer of the non-silicone release film and to relatively increase the center plane average roughness SRa of the surface opposite to the surface having the release layer.
- the release layer surface is preferably smooth.
- the haze value of the release film may be increased.
- the haze value of the release film becomes high, there is a problem that it becomes difficult to apply to optical applications, for example.
- an object of the present invention is to provide a non-silicone which can ensure good coating properties and surface smoothness of a transfer film laminated on a release layer of a release film and has a relatively low haze value. It is to provide a release film.
- a release film having a release layer on one surface of a substrate film, the release layer containing a non-silicone compound as a main component, and the surface roughness SRa (A) of the release layer Is a release film in which the surface roughness SRa (B) on the surface opposite to the surface having the release layer of the release film is less than 10 nm.
- release film according to any one of [1] to [10], wherein the release layer is a cured layer of an active energy ray-curable composition containing at least a long-chain alkyl compound.
- the long-chain alkyl compound is a compound having an ethylenically unsaturated group and a long-chain alkyl group in the molecule.
- a non-silicone release film that can ensure good coatability and surface smoothness of a transfer film laminated on a release layer, and has a relatively low haze value. can do.
- the release film of the present invention has a release layer containing a non-silicone compound as a main component on one surface of a base film.
- the release film of the present invention preferably has a release layer only on one side of the base film, that is, only on one side.
- the silicone compound refers to a silicone compound that has been generally known as a silicone release agent.
- Silicone is a polymer composed of a main chain formed by alternately bonding silicon having an organic group (for example, an alkyl group or a phenyl group) and oxygen.
- an organic group for example, an alkyl group or a phenyl group
- oxygen for example, a silicone compound having dimethylpolysiloxane as a basic skeleton is well known.
- the release layer in the present invention contains a non-silicone compound as a main component.
- the non-silicone compound refers to a compound other than the above-described silicone compound.
- Non-silicone compounds in the present invention include non-silicone release agents, non-silicone binder resins, non-silicone crosslinking agents, and the like.
- the release layer containing a non-silicone compound as a main component means that the non-silicone compound is contained in an amount of 50% by mass or more with respect to 100% by mass of the total solid content of the release layer.
- the non-silicone compound is contained in an amount of 60% by mass or more, more preferably 70% by mass or more, and more preferably 80% by mass or more, based on 100% by mass of the total solid content of the release layer. It is contained, and it is particularly preferably 90% by mass or more. The upper limit is 100% by mass.
- the release layer in the present invention does not contain a silicone compound.
- non-silicone release agent examples include fluororesins, rubber resins, polyolefin resins, alkylated melamine formaldehyde resins, and long-chain alkyl compounds.
- fluororesins rubber resins, polyolefin resins, alkylated melamine formaldehyde resins, and long-chain alkyl compounds.
- long-chain alkyl compounds, alkylated melamine formaldehyde resins, and polyolefin resins are preferable, and long-chain alkyl compounds and alkylated melamine formaldehyde resins are preferable.
- long-chain alkyl compounds are used from the viewpoints of coatability and releasability. preferable.
- fluororesin examples include, for example, ethylene-tetrafluoroethylene copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride.
- a copolymer etc. are mentioned.
- Examples of the rubber-based resin include butadiene-based, styrene-butadiene-based, coloroprene-based, butyl-based, ethylene / propylene-based, and acrylic rubbers.
- polyolefin resins examples include polyethylene, polypropylene, polybutene, polyhexene homopolymers, and copolymers thereof.
- alkylated melamine formaldehyde resin examples include alkylated melamine formaldehyde resins having an alkyl group having 6 to 20 carbon atoms. These resins can be obtained, for example, by adding formaldehyde as an auxiliary agent to a melamine monomer to form methylolated melamine and introducing an alkyl group having 6 to 20 carbon atoms into the produced methylol group.
- the long-chain alkyl compound refers to a compound having a linear or branched alkyl group having 8 or more carbon atoms (also referred to as a long-chain alkyl group).
- the long-chain alkyl group-containing polyvinyl resin examples include alkyl group-containing acrylic resins, long-chain alkyl group-containing polyester resins, long-chain alkyl group-containing ether compounds, and long-chain alkyl group-containing amine compounds.
- the carbon number of the long chain alkyl group is preferably 8 or more, more preferably 10 or more, and particularly preferably 12 or more.
- the long chain alkyl group preferably has 30 or less carbon atoms, more preferably 28 or less, and particularly preferably 25 or less.
- long-chain alkyl compounds a long-chain alkyl group-containing polyvinyl resin and a long-chain alkyl group-containing acrylic resin are preferable from the viewpoint of good peelability.
- Long-chain alkyl group-containing polyvinyl resins include vinyl alcohol polymers (including partially saponified products of polyvinyl acetate), ethylene-vinyl alcohol polymers (including partially saponified products of ethylene-vinyl acetate copolymers), or vinyl alcohol- It can be synthesized by reacting an acrylic acid copolymer (including a partially saponified product of vinyl acetate-acrylic acid copolymer) with a long-chain alkyl group-containing isocyanate compound.
- a hydroxyl group can be contained in the polymer by adjusting the addition amount of the long-chain alkyl group-containing isocyanate compound.
- Examples of the long-chain alkyl group-containing isocyanate compound include monoisocyanate compounds having an alkyl group having 8 or more carbon atoms, specifically, octyl isocyanate, nonyl isocyanate, decyl isocyanate, dodecyl isocyanate, tetradecyl isocyanate, hexadecyl. Examples thereof include isocyanate and octadecyl isocyanate.
- a long-chain alkyl group-containing acrylic resin is an acrylic or methacrylic monomer having a long-chain alkyl group such as octyl acrylate, octyl methacrylate, lauryl acrylate, lauryl methacrylate, octadecyl acrylate or octadecyl methacrylate. Examples thereof include a copolymer and a copolymer.
- Examples of other monomers used in the copolymer include acrylic acid, methacrylic acid, acrylamide, methacrylamide, and styrene.
- the long-chain alkyl compounds described above are commercially available and can be used.
- Commercially available products include “K-256”, “N-137”, “P-677”, “Q-472” of Rethem series manufactured by Chukyo Yushi Co., Ltd., “RA” of ashioresin series manufactured by Acio Sangyo Co., Ltd. -80, “RA-95H”, “RA-585S”, “HT”, “1050”, “1010”, “1070”, “406” of the Pyroleil series manufactured by Lion Specialty Chemicals Co., Ltd. Examples thereof include “ZF-15” and “ZF-15H” manufactured by Nippon Vinegar Poval, and Epomin “RP-20” manufactured by Nippon Shokubai Co., Ltd.
- non-silicone binder resins that can be contained in the release layer as non-silicone compounds include polyurethane resins, acrylic resins, polyester resins, melamine resins, alkyd resins, and epoxy resins. Of these, polyurethane resins and melamine resins are preferred.
- non-silicone crosslinking agent examples include an epoxy crosslinking agent, an isocyanate crosslinking agent, an oxazoline crosslinking agent, a carbodiimide crosslinking agent, and a melamine crosslinking agent. .
- a melamine-based crosslinking agent is preferably used from the viewpoint of reducing the peeling force.
- epoxy-based crosslinking agent examples include ethylene glycol diglycidyl ether, glycerol polyglycidyl ether, polybutadiene diglycidyl ether, and the like.
- isocyanate-based crosslinking agent examples include hexamethylene diisocyanate, isophorone diisocyanate tolylene diisocyanate, and methylene diphenyl diisocyanate.
- oxazoline-based crosslinking agent examples include 2,2′-bis (2-oxazoline), 2,2′-ethylene-bis (4,4′-dimethyl-2-oxazoline), and 2,2′-p-phenylene.
- examples thereof include compounds having an oxazoline group such as bis (2-oxazoline) and bis (2-oxazolinylcyclohexane) sulfide, and polymers containing oxazoline.
- carbodiimide-based crosslinking agents examples include p-phenylene-bis (2,6-xylylcarbodiimide), tetramethylene-bis (t-butylcarbodiimide), cyclohexane-1,4-bis (methylene-t-butylcarbodiimide), etc.
- Examples thereof include a compound having a carbodiimide group and polycarbodiimide which is a polymer having a carbodiimide group.
- a melamine compound used as a melamine-based crosslinking agent is an amino group of so-called melamine [1,3,5-triazine-2,4,6-triamine] in which an amino group is bonded to three carbon atoms of a triazine ring.
- This is a general term for various modified compounds, and includes compounds in which a plurality of triazine rings are condensed.
- the type of modification those in which at least one hydrogen atom of three amino groups is methylolated are preferable, and the methylol group of the methylolated melamine compound is partially or completely etherified with a lower alcohol having 1 to 4 carbon atoms. Alkylated etherified melamine compounds are preferred.
- Examples of the alcohol used for etherification include methyl alcohol, ethyl alcohol, propyl alcohol, and butyl alcohol.
- a commercially available product can be used as the melamine-based crosslinking agent.
- Examples of commercially available products include Super Becamine J-820-60, J-821-60, J-1090-65, J-110-60, J-117-60, and DIC Corporation.
- the release layer preferably contains an acid catalyst in order to promote curing of the release layer.
- the acid catalyst include sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, p-toluenesulfonic acid and the like. Of these, p-toluenesulfonic acid is preferably used.
- the release layer includes a cured layer of a thermosetting composition containing at least a long-chain alkyl compound and a crosslinking agent.
- a thermosetting composition containing at least a long-chain alkyl compound and a crosslinking agent.
- the long-chain alkyl compound and the crosslinking agent the aforementioned compounds can be used.
- the thermosetting composition further contains the above acid catalyst.
- the content of the long-chain alkyl compound in the thermosetting composition is 30% by mass or more with respect to 100% by mass of the total solid content of the thermosetting composition from the viewpoint of reducing the peeling force on the surface of the release layer.
- the content of the long-chain alkyl compound is 98 % By mass or less is preferred, 95% by mass or less is more preferred, and 90% by mass or less is particularly preferred.
- the content of the crosslinking agent in the thermosetting composition is preferably 3% by mass or more, preferably 5% by mass or more with respect to 100% by mass of the total solid content of the thermosetting composition, from the viewpoint of reducing the peeling force. More preferred is 10% by mass or more.
- the content of the crosslinking agent is preferably 50% by mass or less, more preferably 30% by mass or less, 20 A mass% or less is particularly preferred.
- thermosetting composition a melamine crosslinking agent is preferable as described above.
- the content of a crosslinking agent other than the melamine-based crosslinking agent for example, an isocyanate-based crosslinking agent, from the viewpoint of reducing the peeling force of the release layer. Is preferably less than the content of the melamine crosslinking agent.
- the content of the crosslinking agent other than the melamine-based crosslinking agent is preferably 90 parts by mass or less, more preferably 70 parts by mass or less, and particularly preferably 50 parts by mass or less with respect to 100 parts by mass of the melamine-based crosslinking agent. .
- the content of the acid catalyst is 0.1 to 10 with respect to 100% by mass of the total solid content of the thermosetting composition from the viewpoint of reducing the peeling force.
- the range of mass% is preferable, 0.3 to 5 mass% or more is more preferable, and the range of 0.5 to 3 mass% is particularly preferable.
- the conditions (heating temperature and time) for curing the thermosetting composition are not particularly limited, but the heating temperature is preferably 70 ° C or higher, more preferably 100 ° C or higher, and particularly preferably 150 ° C or higher.
- the heating temperature is preferably 300 ° C. or lower.
- the heating time is preferably in the range of 3 to 300 seconds, more preferably in the range of 5 to 200 seconds.
- a cured layer of an active energy ray-curable composition containing at least a long-chain alkyl compound can be exemplified.
- the active energy ray-curable composition contains a compound that is polymerized and cured by active energy rays (hereinafter referred to as an active energy ray-curable compound).
- active energy ray-curable compounds include compounds (monomers and oligomers) having an ethylenically unsaturated group in the molecule.
- examples of the ethylenically unsaturated group include acryloyl group, methacryloyl group, acryloyloxy group, methacryloyloxy group, allyl group, and vinyl group.
- the long-chain alkyl compound contained in the active energy ray-curable composition may or may not be an active energy ray-curable compound, but is preferably an active energy ray-curable compound. That is, the long-chain alkyl compound contained in the active energy ray-curable composition is a compound containing an ethylenically unsaturated group and a long-chain alkyl group in the molecule (hereinafter referred to as “active energy ray-curable long-chain alkyl compound ( ⁇ ) ”))).
- active energy ray-curable long-chain alkyl compound ( ⁇ ) ”) A long-chain alkyl compound that is not an active energy ray-curable compound may be referred to as a non-curable long-chain alkyl compound.
- the long-chain alkyl compound contained in the active energy ray-curable composition is a non-curable long-chain alkyl compound
- the above-described long-chain alkyl compound can be used.
- the active energy ray-curable composition in this case is an active energy ray-curable compound having no long-chain alkyl group (an alkyl group having 8 or more carbon atoms) in the molecule (hereinafter referred to as “other active energy ray-curable compounds ( ⁇ ) ”may need to be contained.
- other active energy ray-curable compound ( ⁇ ) will be described later in detail.
- the active energy ray-curable composition can be used in combination with an active energy ray-curable long-chain alkyl compound ( ⁇ ) and a non-curable long-chain alkyl compound or other active energy ray-curable compound ( ⁇ ).
- the active energy ray-curable composition preferably uses the active energy ray-curable long-chain alkyl compound ( ⁇ ) and another active energy ray-curable compound ( ⁇ ) in combination.
- the active energy ray-curable composition contains the active energy ray-curable long-chain alkyl compound ( ⁇ ) will be described in detail.
- ... (meth) acrylate is a general term for “... acrylate” and “... methacrylate”.
- the active energy ray-curable long chain alkyl compound ( ⁇ ) is a compound containing an ethylenically unsaturated group and a long chain alkyl group in the molecule.
- the long chain alkyl group has preferably 8 or more carbon atoms, more preferably 10 or more, and particularly preferably 12 or more.
- the long chain alkyl group preferably has 30 or less carbon atoms, more preferably 28 or less, and particularly preferably 25 or less.
- Examples of the active energy ray-curable long chain alkyl compound ( ⁇ ) include octyl (meth) acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, pentadecyl (meth) acrylate, hexadecyl (meth) acrylate, and octadecyl (meth). ) Acrylate, nonadecyl (meth) acrylate, eicosyl (meth) acrylate and the like.
- the following active energy ray-curable long-chain alkyl compound ( ⁇ ) is preferably used.
- examples of such a compound include a (meth) acrylate compound (a) having at least one (meth) acryloyl group and a hydroxyl group in the molecule, and a polyisocyanate compound (b) having at least two isocyanate groups in the molecule. ) And a higher alcohol (c) having 8 to 30 carbon atoms.
- Examples of the (meth) acrylate compound (a) include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, Glycerin mono (meth) acrylate, glycerin di (meth) acrylate, 2-hydroxy-3-acryloyloxypropyl methacrylate, 2- (meth) acryloyloxyethyl-2-hydroxyethylphthalic acid, 2-methacryloyloxyethyl-2-hydroxy Propyl phthalate, 2- (meth) acryloyloxyethyl-acid phosphate, epoxy (meth) acrylate, pentaerythritol monoacrylate, pentaerythritol diacrylate, pentae Thritol triacrylate, dipentaerythritol monoacrylate, dipentaerythritol diacryl
- polyisocyanate compound (b) examples include hexamethylene diisocyanate, lysine diisocyanate, naphthalene diisocyanate, diphenylmethane diisocyanate, tolidine diisocyanate, tolylene diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene.
- Diisocyanate compounds such as diisocyanates and hydrogenated xylylene diisocyanates, biuret-type polyisocyanate compounds obtained by reacting these various diisocyanate compounds with water, or various diisocyanate compounds and polyhydric alcohols such as trimethylolpropane are reacted.
- Adduct type polyisocyanate compound Or those of the various compounds of the multimeric such known and commonly obtained allowed isocyanurating the like.
- polyisocyanate compounds compounds having a molecular weight of 50 to 500 are preferable, compounds having a molecular weight of 100 to 400 are more preferable, and compounds having a molecular weight of 130 to 300 are particularly preferable.
- hexamethylene diisocyanate (molecular weight 168) and diphenylmethane diisocyanate (molecular weight 250) are exemplified as preferred compounds.
- Examples of the higher alcohol (c) include linear higher alcohols such as octyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetanol, cetostearyl alcohol, stearyl alcohol, and behenyl alcohol.
- Examples of the saturated higher alcohol include oleyl alcohol, and examples of the branched higher alcohol include 2-hexyldecanol, 2-octyldodecanol, and 2-decyltetradodecanol.
- the higher alcohol (c) can be used as the higher alcohol (c).
- Examples of other active energy ray-curable compounds ( ⁇ ) that can be contained in the active energy ray-curable composition include methyl (meth) acrylate, ethyldiethylene glycol (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, and methoxy.
- compounds having 2 to 7 ethylenically unsaturated groups in the molecule are preferable, and compounds having 3 to 6 ethylenically unsaturated groups in the molecule are particularly preferable.
- the content of the long-chain alkyl compound in the active energy ray-curable composition reduces the peeling force of the release layer.
- the active energy ray-curable composition has a solid content of 100% by mass, preferably 1% by mass or more, more preferably 5% by mass or more, and particularly preferably 7% by mass or more.
- the content of the long-chain alkyl compound is 70 masses. % Or less is preferable, 50% by mass or less is more preferable, and 30% by mass or less is particularly preferable.
- the content of the other active energy ray-curable compound ( ⁇ ) in the active energy ray-curable composition increases the strength (hardness) of the release layer to improve the solvent resistance and heat resistance. 10 mass% or more is preferable with respect to 100 mass% of solid content total amount of a wire-curable composition, 20 mass% or more is more preferable, and 30 mass% or more is especially preferable. On the other hand, if the content of the other active energy ray-curable compound ( ⁇ ) is too large, the release force on the surface of the release layer may increase, so the content of the other active energy ray-curable compound ( ⁇ )
- the amount is preferably 90% by mass or less, more preferably 80% by mass or less, and particularly preferably 70% by mass or less.
- the active energy ray-curable composition preferably further contains a photopolymerization initiator.
- the photopolymerization initiator include acetophenone, 2,2-diethoxyacetophenone, p-dimethylacetophenone, p-dimethylaminopropiophenone, benzophenone, 2-chlorobenzophenone, 4,4′-dichlorobenzophenone, 4,4′-bisdiethylaminobenzophenone, Michler's ketone, benzyl, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, methyl benzoylformate, p-isopropyl- ⁇ -hydroxyisobutylphenone, ⁇ -hydroxyisobutylphenone, 2, Carbonyl compounds such as 2-dimethoxy-2-phenylacetophenone and 1-hydroxycyclohexyl phenyl ketone, tetramethylthiuram monos
- photopolymerization initiators are generally commercially available and can be used.
- the content of the photopolymerization initiator is suitably in the range of 0.1 to 10% by mass, and in the range of 0.5 to 8% by mass with respect to 100% by mass of the total solid content of the active energy ray-curable composition. Is preferred.
- Examples of active energy rays for curing the active energy ray-curable composition include ultraviolet rays, visible rays, infrared rays, electron beams, ⁇ rays, and ⁇ rays.
- ultraviolet rays and electron beams are preferable, and ultraviolet rays are particularly preferably used.
- an ultraviolet fluorescent lamp for example, an ultraviolet fluorescent lamp, a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a carbon arc lamp, a metal halide lamp, a xenon lamp etc.
- An ArF excimer laser, a KrF excimer laser, an excimer lamp, synchrotron radiation, or the like can also be used.
- an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, and a metal halide lamp are preferably used.
- it is preferable to perform irradiation in an atmosphere having a low oxygen concentration for example, an atmosphere having an oxygen concentration of 500 ppm or less because it can be cured efficiently.
- Irradiation light amount of the ultraviolet rays is preferably from 50 mJ / cm 2 or more, 100 mJ / cm 2 or more, and particularly 150 mJ / cm 2 or more. Further, the amount of ultraviolet irradiation is preferably 2000 mJ / cm 2 or less, and more preferably 1000 mJ / cm 2 or less.
- the thickness of the release layer is preferably in the range of 10 to 1000 nm, more preferably in the range of 20 to 600 nm, further preferably in the range of 20 to 300 nm, and particularly preferably in the range of 50 to 250 nm.
- the surface free energy of the release layer is 20 to 35 mJ / m.
- the range of 2 is preferable, the range of 21 to 32 mJ / m 2 is more preferable, and the range of 22 to 30 mJ / m 2 is particularly preferable.
- the surface free energy of the release layer is less than 20 mJ / m 2 , the coatability of the film to be transferred may be deteriorated.
- the surface free energy is greater than 35 mJ / m 2 , the peeling force may be increased.
- the surface rough free energy can be measured using a contact angle meter, for example, “Drop Master DM501” manufactured by Kyowa Interface Science Co., Ltd. Details will be described later.
- a non-silicone release agent as the release agent to be contained in the release layer. It is preferable to use it.
- the release film of the present invention has a release layer on one surface of the base film, and the release layer has a surface roughness SRa (A) of less than 10 nm.
- the surface roughness SRa can be measured using an optical interference microscope, for example, “VertScan” manufactured by Ryoka System Co., Ltd. Details will be described later.
- the surface roughness SRa (A) of the release layer is 10 nm or more
- a film to be transferred laminated on the release layer such as an adhesive layer, a ceramic layer, a metal particle-containing resin layer, an optical resin layer, etc. Inconveniences such as poor coatability of the film to be transferred and reduced smoothness of the film to be transferred occur.
- the surface roughness SRa (A) of the release layer is 10 nm or more, the haze value of the release film tends to increase.
- the surface roughness SRa (A) of the release layer is preferably less than 8 nm, more preferably less than 7 nm, and particularly preferably less than 6 nm.
- the lower limit surface roughness SRa (A) is about 0.1 nm.
- the method for controlling the surface roughness SRa (A) of the release layer to be less than 10 nm is not particularly limited.
- the release layer does not contain particles (filler),
- the particles (filler) are included in the release layer, the particle diameter and content are adjusted.
- the release film of the present invention may be abbreviated as a surface opposite to the surface on which the release layer of the release film is provided (hereinafter referred to as “an opposite surface of the release film” or simply “an opposite surface”). It is important that the surface roughness SRa (B) is less than 10 nm.
- the surface roughness SRa (B) of the opposite surface of the release film is 10 nm or more, that is, when the surface state of the opposite surface is prone to roughening, the rough surface state of the opposite surface, for example, fine irregularities and fine protrusions In some cases, the shape is transferred to a release layer or a film to be transferred laminated on the release layer, resulting in inferior smoothness or damage. Moreover, when the surface roughness SRa (B) on the opposite surface of the release film is 10 nm or more, the haze value of the release film tends to increase.
- the release film of the present invention is preferably produced continuously by a roll-to-roll method, and the step of laminating the transfer film on the release layer of the release film is also a roll-to-roll process. It is preferable to carry out continuously in a manner.
- the release layer or the film to be transferred and the opposite surface are in strong contact with each other and are affected by the surface state of the opposite surface, and therefore the opposite surface is preferably smooth. That is, it is important that the surface roughness SRa (B) on the opposite surface of the release film is less than 10 nm.
- the surface roughness SRa (B) of the opposite surface of the release film is preferably less than 8 nm, particularly preferably less than 7 nm. Further, the surface roughness SRa (B) is preferably 0.5 nm or more, more preferably 1.0 nm or more, and particularly preferably 2.0 nm or more.
- the opposite surface of the release film of the present invention may be composed of the base film itself, or may be composed of a coating film provided on the base film.
- the coating film when the opposite surface of the release film is formed of a coating film is preferably a smooth resin film.
- the coating film may have functions such as antistatic properties and oligomer blocks.
- the opposite surface of the release film of the present invention is more preferably composed of the base film itself. That is, it is more preferable not to have a coating film on the opposite surface of the release film. That is, it is preferable that the surface of the base film is exposed on the opposite surface of the release film.
- a coating film is provided on the opposite surface of the release film, there may be inconveniences such as transfer of components of the coating film to the release layer or transferred film. Further, the provision of the coating film may cause a decrease in productivity and an increase in cost.
- the release film of the present invention preferably has a haze value of less than 1.5%. Such a low haze release film is suitable for optical applications such as optical inspection of a film to be transferred via the release film.
- the haze value of the release film is further preferably less than 1.3%, more preferably less than 1.0%, and particularly preferably less than 0.8%.
- the lower limit haze value is not particularly limited, but is about 0.1%.
- the release film having a low haze as described above can be realized by means such as using a base film having a low haze value or not containing particles in the release layer. Details of the base film having a low haze value will be described later.
- the base film used for the release film of the present invention is not particularly limited.
- the material constituting the base film include polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polypropylene, polyethylene, and the like.
- Cellulose resin such as polyolefin resin, diacetyl cellulose, triacetyl cellulose, polysulfone resin, polyether ether ketone resin, polyether sulfone resin, polyphenylene sulfide resin, polyetherimide resin, polyimide resin, polyamide resin, acrylic resin, cyclic olefin resin,
- Various resins such as polycarbonate resin can be used.
- the thickness of the base film is preferably less than 30 ⁇ m, more preferably less than 25 ⁇ m, and particularly preferably less than 20 ⁇ m.
- the thickness of the base film is preferably 5 ⁇ m or more, and particularly preferably 10 ⁇ m or more.
- the base film relatively thin, since the bending rigidity of the release film is reduced, and the release force when the release film is released from the transfer film is relatively reduced.
- the maximum length of one winding roll can be made long.
- the base film is a relatively thin film and the maximum length of one winding roll is long, strong pressure is applied to the lower winding portion of the winding roll.
- the transfer film laminated on the mold layer is strongly influenced by the opposite surface of the release film, but the surface roughness SRa (B) of the opposite surface of the release film is less than 10 nm. Influence is reduced.
- the release film of the present invention is useful for improving the productivity by making the base film relatively thin and lengthening the maximum length of one winding roll.
- the maximum length of one winding roll is, for example, preferably 3,000 m or more, more preferably 5,000 m or more, and particularly preferably 10,000 m or more.
- the upper limit is about 30,000 m.
- the length in the width direction of the take-up roll is not particularly limited, but is suitably about 300 to 3,000 mm, preferably in the range of 500 to 2,000 mm, particularly preferably in the range of 700 to 1,700 mm.
- the base film used in the present invention is preferably a polyester film, and particularly preferably a biaxially stretched polyester film.
- a polyester film a polyethylene terephthalate film is preferable.
- the polyester is preferably a polyester that is obtained by polymerization from a monomer having at least 70 mol% as a main component of an aromatic dicarboxylic acid and a diol.
- aromatic dicarboxylic acid examples include terephthalic acid and 2,6-naphthalenedicarboxylic acid, and terephthalic acid is particularly preferable. These acid components may be used alone or in combination of two or more, and may be partially copolymerized with other aromatic dicarboxylic acids such as isophthalic acid or fatty acids.
- diol component examples include ethylene glycol, 1,2-propanediol, 1,3-propanediol, neopentyl glycol, and the like. Of these, ethylene glycol is preferably used. These diol components may be used alone or in combination of two or more.
- the polyester is preferably polyethylene terephthalate, polyethylene naphthalate, and a copolymer thereof, polybutylene terephthalate and a copolymer thereof, polybutylene naphthalate and a copolymer thereof, and further, polyhexamethylene terephthalate and a copolymer thereof, Examples thereof include polyhexamethylene naphthalate and copolymers thereof, and polyethylene terephthalate is particularly preferable.
- Polyester can be produced by a conventionally known method. For example, a method in which an acid component is directly esterified with a diol component, and then the product of this reaction is heated under reduced pressure to perform polycondensation while removing excess diol component, or a dialkyl as an acid component A method of producing an ester by transesterifying it with a diol component and then performing polycondensation in the same manner as described above can be employed. At this time, conventionally known alkali metals, alkaline earth metals, manganese, cobalt, zinc, antimony, germanium, titanium compounds, and the like can be used as a reaction catalyst, if necessary.
- the surface roughness SRa (1) of the surface on which the release layer of the base film is provided is: It is preferably less than 10 nm, more preferably less than 8 nm, and particularly preferably less than 7 nm. Further, the surface roughness SRa (1) is preferably 0.5 nm or more, more preferably 1 nm or more, and particularly preferably 2 nm or more.
- SRa (2) on the surface opposite to the surface on which the release layer of the base film is provided is less than 10 nm. Is more preferable, it is more preferable that it is less than 8 nm, and it is especially preferable that it is less than 7 nm.
- the surface roughness SRa (1) is preferably 0.5 nm or more, more preferably 1 nm or more, further preferably 2 nm or more, and particularly preferably 3 nm or more.
- the surface roughness SRa ( 2) is the surface roughness SRa (B) of the opposite surface of the release film.
- the release film of the present invention preferably has a haze value of less than 1.5%.
- the haze value of the base film is less than 1.5%. It is preferable.
- the haze value of the base film is further preferably less than 1.3%, more preferably less than 1.0%, and particularly preferably less than 0.8%.
- the lower limit haze value is not particularly limited, but is about 0.1%.
- the base film preferably has a three-layer laminated structure. Further, it is preferable that both surface layers on both sides of the three-layer laminated structure contain particles having an average particle diameter of 0.2 to 0.7 ⁇ m.
- the average particle diameter of the particles is preferably in the range of 0.2 to 0.6 ⁇ m.
- the surface roughness SRa of the base film is increased, and the surface roughness SRa (A) and SRa (B) of the release film may be 10 nm or more. . Further, the haze value may be 1.5% or more.
- the average particle diameter of the particles is smaller than 0.2 ⁇ m, workability such as transportability and winding property may be deteriorated.
- the content of the particles in each surface layer is preferably in the range of 0.01 to 0.10% by mass, and 0.02 to 0.08% by mass with respect to 100% by mass of the total solid content of each surface layer. A range is more preferred.
- the three-layer laminated structure is preferably a three-layer laminated structure composed of A layer / B layer / A layer or A layer / B layer / C layer.
- the particle type, average particle diameter, and content contained in the A layer and C layer, which are surface layers, may be the same or different.
- the two A layers on both sides may be the same or different in thickness, but are preferably the same. Simplification and productivity improvement.
- the B layer contains substantially no particles and the surface layer (A layer or C layer) contains particles.
- the base film has a three-layer laminated structure, and the thickness of both surface layers (A layer or C layer) on both sides is preferably 0.1 to 2.0 ⁇ m, preferably 0.2 to 1.0 ⁇ m. More preferably, it is 0.4 to 0.8 ⁇ m.
- the thickness of B layer can be suitably set according to the total thickness of a base film.
- inorganic particles or organic particles can be used as the particles contained in the surface layer (A layer or C layer).
- examples include inorganic particles such as silicon oxide, calcium carbonate, alumina, aluminum silicate, mica, clay, talc, and barium sulfate, and organic particles such as polyimide resin, olefin or modified olefin resin, cross-linked polystyrene resin, and silicone resin. be able to.
- particles having a nearly spherical particle shape and a relatively small difference in refractive index from polyester are preferable.
- colloidal silica, silicone particles, and crosslinked polystyrene particles are preferably used.
- vinylbenzene / styrene copolymer crosslinked particles prepared by emulsion polymerization are particularly preferably used because the particle shape is close to a true sphere and the particle size distribution is uniform.
- the surface layer (A layer or C layer) having a three-layer structure preferably contains aggregated alumina together with the particles.
- the aggregated alumina is one in which several to several hundred primary particles are aggregated.
- the average primary particle diameter of alumina forming the aggregated alumina is preferably in the range of 5 to 30 nm, more preferably in the range of 8 to 15 nm.
- the average secondary particle diameter of the aggregated alumina is preferably in the range of 0.01 to 0.20 ⁇ m, and more preferably in the range of 0.02 to 0.15 ⁇ m.
- agglomerated alumina one produced by flame hydrolysis using anhydrous aluminum chloride as a raw material or hydrolysis of alcoside alumina can be employed.
- these crystal types ⁇ type, ⁇ type, ⁇ type and the like are known, and in particular, ⁇ type alumina can be preferably used.
- ⁇ type alumina in the case of a polyester resin, it can be used by adding at the time of polyester polymerization.
- pulverization and dispersion such as a sand grinder
- agglomerated alumina having an average secondary particle diameter of 0.01 to 0.20 ⁇ m can be obtained.
- the aggregated alumina thus obtained is added to the base film, it is arranged in the plane direction by biaxial stretching, does not form substantial protrusions, has little effect on the surface roughness, Since the permeability is good, an increase in haze value can be suppressed.
- the content of aggregated alumina in each surface layer is preferably in the range of 0.1 to 1.0% by mass with respect to 100% by mass of the total solid content of each surface layer, 0.2%
- the range of -0.9 mass% is more preferable, and the range of 0.6-0.8 mass% is particularly preferable.
- particles were dispersed in a predetermined ratio in a form of slurry in ethylene glycol, which is a diol component, and, for example, high-precision filtration capable of collecting 95% or more of coarse particles of 3 ⁇ m or more was performed. Thereafter, this ethylene glycol slurry is added at an arbitrary stage before the completion of polyester polymerization.
- ethylene glycol which is a diol component
- this ethylene glycol slurry is added at an arbitrary stage before the completion of polyester polymerization.
- it is preferable to add the water sol or alcohol sol obtained at the time of synthesis without drying since the dispersibility of the particles is good and the generation of coarse protrusions can be suppressed. . It is also effective to mix a water slurry of particles directly with a predetermined polyester pellet, and supply the mixture to a vent type twin-screw kneading extruder to knead it into the polyester.
- the particle-containing master pellets prepared in this way and pellets substantially free of particles, etc., are mixed at a predetermined ratio, dried, then supplied to a known melt laminating extruder, and the polymer is filtered through a filter. .
- an unstretched film is produced by extruding into a sheet from a slit-shaped slit die and cooling and solidifying on a casting roll. That is, 1 to 3 extruders, 1 to 3 layers of manifolds or merging blocks (for example, a merging block having a rectangular merging section) are stacked as necessary, the sheet is extruded from the die, and cooled by a casting roll.
- a method of installing a static mixer and a gear pump in the polymer flow channel is effective from the viewpoint of stabilizing the back pressure and suppressing thickness fluctuation.
- the stretching method may be simultaneous biaxial stretching or sequential biaxial stretching.
- the first longitudinal stretching is important, and the stretching temperature is 90 to 130 ° C., preferably 105 to 120 ° C.
- the stretching temperature is lower than 90 ° C., the film is easily broken, and when the stretching temperature is higher than 130 ° C., the film surface is easily damaged by heat, which is not preferable.
- the stretching is preferably performed in two or more stages, and the total magnification is 3 to 4.5 times, preferably 3.2 to 4.2 times in the length direction. It is 3.2 to 5.0 times, preferably 3.9 to 4.5 times in the width direction.
- a timely magnification can be selected, but in order to increase the breaking strength in the width direction, it is more preferable to set the stretching ratio in the width direction higher than in the longitudinal direction. If the temperature and magnification range are out of this range, problems such as uneven stretching or film breakage are caused, and it is difficult to obtain the base film in the present invention, which is not preferable.
- heat setting is performed at 200 to 230 ° C., preferably 210 to 230 ° C. for 0.5 to 20 seconds, preferably 1 to 15 seconds.
- the heat setting temperature is lower than 200 ° C.
- the crystallization of the film does not proceed, the structure is not stable, and the target characteristics such as heat shrinkage cannot be obtained.
- the release film of the present invention is produced by laminating a release layer on one surface of a base film.
- the release layer is formed by applying a coating solution prepared by dissolving or dispersing the above-described release agent, binder resin, cross-linking agent, etc. in a solvent on a base film by a wet coating method, and drying and curing as necessary. Is done.
- Examples of the wet coating method include a reverse coating method, a spray coating method, a bar coating method, a gravure coating method, a rod coating method, a die coating method, a spin coating method, an extrusion coating method, and a curtain coating method.
- the release force on the release layer surface is preferably relatively small from the viewpoint of obtaining good peelability of the transfer film laminated on the release layer. 7N / 50mm or less is preferable, 5N / 50mm or less is more preferable, and 2N / 50mm or less is particularly preferable. If the peel force becomes too small, the coatability of the transfer film may be reduced or the transfer film may be peeled off other than the original peeling step, so the peel force is preferably 0.05 N / 50 mm or more, 0.10 N / 50 mm or more is preferable, and 0.20 N / 50 mm or more is particularly preferable.
- the peeling force on the surface of the release layer is the peeling force with the adhesive tape. That is, it is a peeling force when an adhesive tape is bonded to the surface of the release layer of the release film and the adhesive tape side is peeled off at 180 °.
- This peeling force was evaluated as a peeling force (1) in Examples described later. Details of the measurement method will be described later.
- the thickness of the base film constituting the release film of the present invention is preferably relatively small. Specifically, it is preferably less than 30 ⁇ m, more preferably less than 25 ⁇ m, and particularly preferably less than 20 ⁇ m.
- the haze value of the base film was also measured using a turbidimeter “NDH-4000” manufactured by Nippon Denshoku Industries Co., Ltd. based on JIS K 7136 (2000).
- the following coating transfer film coating solution (ceramic slurry) was applied with a wire bar so that the dry film thickness was 2 ⁇ m, and dried to form a film to be transferred. .
- ⁇ Coating solution for transfer film > 100 parts by weight of barium titanate (“HPBT-1” from Fuji Titanium Industry Co., Ltd.), 7 parts by weight of polyvinyl butyral (“BL-1” from Sekisui Chemical Co., Ltd.), 2 parts by weight of dibutyl phthalate, toluene / methyl ethyl ketone (Mass ratio 1: 1) Glass beads were added to 40 parts by mass, mixed and dispersed in a jet mill for 20 hours, and then filtered to prepare a paste-like ceramic slurry.
- HPBT-1 barium titanate
- BL-1 polyvinyl butyral
- Mass ratio 1 Glass beads were added to 40 parts by mass, mixed and dispersed in a jet mill for 20 hours, and then filtered to prepare a paste-like ceramic slurry.
- the sum of the obtained dispersion force component value, polar force component value, and hydrogen bond force component value is defined as the value of the surface free energy (E) as shown in the following equation.
- polyester pellet a To dimethyl terephthalate (DMT), 1.9 moles of ethylene glycol with respect to 1 mole of DMT, 0.05 parts by weight of magnesium acetate tetrahydrate with respect to 100 parts by weight of DMT, and 0.015 parts by weight of phosphoric acid.
- DMT dimethyl terephthalate
- magnesium acetate tetrahydrate magnesium acetate tetrahydrate with respect to 100 parts by weight of DMT
- 0.015 parts by weight of phosphoric acid transesterification was performed to obtain a transesterification product a.
- 0.025 parts by mass of antimony trioxide was added to 100 parts by mass of DMT, the temperature was raised by heating and a polycondensation reaction was performed by evacuation to obtain polyester pellet a having an intrinsic viscosity of 0.62.
- polyester pellet b Ethylene glycol containing 10% by mass of ⁇ -type alumina as agglomerated alumina was pulverized and dispersed using a sand grinder, and further filtered through a 3 ⁇ m filter with a collection efficiency of 95% to obtain an ethylene glycol slurry. This was added to the transesterification product a prepared in the same manner as described above, followed by addition of antimony trioxide, and a polycondensation reaction was performed to obtain a polyester pellet b having an intrinsic viscosity of 0.62 containing 2% by mass of aggregated alumina. It was.
- polyester pellet c (Preparation of polyester pellet c) Polyester pellets a prepared in the same manner as described above, an aqueous slurry of vinylbenzene / styrene copolymer crosslinked particles having an average particle size of 0.45 ⁇ m, and 1 mass% of the crosslinked particles using a vented biaxial kneader. The polyester pellet c containing was obtained.
- polyester pellet d (Preparation of polyester pellet d) Polyester pellets a prepared in the same manner as described above, an aqueous slurry of vinylbenzene / styrene copolymer crosslinked particles having an average particle size of 0.20 ⁇ m, and 1 mass% of the crosslinked particles using a vented biaxial kneader. A polyester pellet d containing was obtained.
- polyester pellet e (Preparation of polyester pellet e) Polyester pellets a prepared in the same manner as described above, an aqueous slurry of vinylbenzene / styrene copolymer crosslinked particles having an average particle size of 0.80 ⁇ m, and 1 mass% of the crosslinked particles using a vented biaxial kneader. The polyester pellet e containing was obtained.
- polyester film having a three-layer structure (A layer / B layer / A layer) was produced in the following manner.
- Layer A Polyester A containing 0.7% by mass of agglomerated alumina and 0.03% by mass of divinylbenzene / styrene copolymer crosslinked particles as a raw material by mixing polyester pellet a, polyester pellet b and polyester pellet c Prepared.
- -B layer Polyester B was prepared using the polyester pellet a as a raw material.
- Polyesters A and B prepared above were each dried under reduced pressure at 160 ° C. for 8 hours, then supplied to separate extruders, melt extruded at 275 ° C., filtered with high accuracy through a 5 ⁇ m filter, and then joined to a rectangular three layer
- the blocks were merged and laminated to form a three-layer laminate comprising polyester A / polyester B / polyester A.
- the film was wound around a casting drum having a surface temperature of 25 ° C. on a cooling roll through a slit die maintained at 285 ° C. by using an electrostatic application casting method, and solidified by cooling to obtain an unstretched laminated film.
- This unstretched laminated film was stretched by a sequential biaxial stretching machine at 110 ° C.
- polyester film 1 in the longitudinal direction by 3.7 times and in the width direction by 4.1 times, respectively, for a total of 15.2 times.
- the film was stretched in the 05-fold width direction and heat-treated at 220 ° C. for 3 seconds under a constant length. Thereafter, relaxation treatment of 1% in the longitudinal direction and 2% in the width direction was performed to obtain a biaxially stretched polyester film (polyester film 1) having a total thickness of 16 ⁇ m.
- the thickness of the polyester A layer on both sides of this polyester film 1 was 0.6 ⁇ m, and the thickness of the B layer was 14.8 ⁇ m. Moreover, the surface roughness SRa (1) and SRa (2) of the polyester film 1 was 6 nm, respectively, and the haze value was 0.4%.
- Polyester film 2 having a total thickness of 38 ⁇ m in the same manner as polyester film 1 except that the thickness of the polyester A layer on both sides is changed to 0.6 ⁇ m and the thickness of the B layer is changed to 36.8 ⁇ m. Was made.
- the surface roughness SRa (1) and SRa (2) of this polyester film 2 was 6 nm, respectively, and the haze value was 0.5%.
- This polyester film 3 had a total thickness of 16 ⁇ m, the thickness of the polyester A layers on both sides was 0.6 ⁇ m, and the thickness of the B layer was 14.8 ⁇ m.
- the surface roughness SRa (1) and SRa (2) of this polyester film 3 was 4 nm, respectively, and the haze value was 0.3%.
- polyester film 4 A polyester film having a three-layer structure (A layer / B layer / C layer) was produced in the following manner.
- -A layer As a raw material of A layer, the polyester pellet a, the polyester pellet b, and the polyester pellet c are mixed, 0.7% by mass of aggregated alumina and 0.03% by mass of divinylbenzene / styrene copolymer crosslinked particles are contained.
- Polyester A was prepared.
- -B layer Polyester B was prepared using the polyester pellet a as a raw material of B layer.
- polyester pellet a As a raw material of C layer, polyester pellet a, polyester pellet b, and polyester pellet e are mixed, 0.7% by mass of aggregated alumina, and 0.13% by mass of divinylbenzene / styrene copolymer crosslinked particles are contained. Polyester C was prepared.
- Polyesters A, B, and C prepared above were each dried under reduced pressure at 160 ° C. for 8 hours, then supplied to separate extruders, melt-extruded at 275 ° C., filtered with high accuracy through a 5 ⁇ m filter, and then rectangular three layers
- the resultant merging block was joined and laminated to form a three-layer laminate consisting of polyester A / polyester B / polyester C.
- the film was wound around a casting drum having a surface temperature of 25 ° C. on a cooling roll through a slit die maintained at 285 ° C. by using an electrostatic application casting method, and solidified by cooling to obtain an unstretched laminated film.
- This unstretched laminated film was stretched by a sequential biaxial stretching machine at 110 ° C. in the longitudinal direction by 3.7 times and in the width direction by 4.1 times, respectively, for a total of 15.2 times.
- the film was stretched in the 05-fold width direction and heat-treated at 220 ° C. for 3 seconds under a constant length. Thereafter, relaxation treatment of 1% in the longitudinal direction and 2% in the width direction was performed to obtain a biaxially stretched polyester film (polyester film 4) having a total thickness of 16 ⁇ m.
- the thicknesses of the polyester A layer and the C layer on both sides of this polyester film 4 were 0.6 ⁇ m, and the thickness of the B layer was 14.8 ⁇ m. Moreover, the surface roughness SRa (1) of the A layer of the polyester film 4 was 6 nm, the surface roughness SRa (2) of the C layer was 15 nm, and the haze value was 1.5%.
- polyester film 5 A polyester film (“Lumilar (registered trademark)" R80) manufactured by Toray Industries, Inc. was used. This polyester film had a total thickness of 38 ⁇ m, a surface roughness SRa (1) of 7 nm, a surface roughness SRa (2) of 25 nm, and a haze value of 9.0%.
- polyester film 6 A polyester film (“Lumilar (registered trademark)" R75X) manufactured by Toray Industries, Inc. was used. This polyester film had a total thickness of 38 ⁇ m, surface roughness SRa (1) and SRa (2) of 25 nm, and a haze value of 5.0%.
- Example 1 The following release layer coating liquid p1 (thermosetting composition) was applied to one surface of polyester film 1 (surface roughness SRa (1) surface) with a gravure coater, and after preliminary drying at 100 ° C, A release film was prepared by heating and drying at 160 ° C. to form a release layer. The thickness of the release layer was 100 nm.
- the release layer coating liquid p2 thermosetting composition
- ⁇ Release layer coating solution p3> 10 parts by mass in terms of solid content of long-chain alkyl compound (“Pyroyl” 1050 from Lion Specialty Chemicals Co., Ltd.) ⁇ Crosslinking agent; Melamine-based cross-linking agent (DIC brand name “Super” 2.5 parts by mass of becamine G "821) in terms of solid content; acid catalyst; 1.3 parts by mass of p-toluenesulfonic acid (TAYCACURE AC-700 from Teika Co., Ltd.) in solvent ; 400 parts by mass of toluene, 130 parts by mass of methyl ethyl ketone [Example 4] A release film was produced in the same manner as in Example 1 except that the release layer coating solution p4 (thermosetting composition) was changed to the following.
- the release layer coating solution p4 thermosetting composition
- Release layer coating solution p4> 10 parts by mass of long-chain alkyl compound (“Pyroyl” HT from Lion Specialty Chemicals Co., Ltd.) in terms of solid content ⁇ Crosslinking agent; Melamine-based crosslinking agent (“Uban” from Mitsui Chemicals, Inc.) 28-60) 2.5 parts by mass in terms of solids; acid catalyst; p-toluenesulfonic acid (“TAYCACURE” AC-700 from Teika Co., Ltd.) 1.8 parts by mass in terms of solids; solvent; toluene 400 parts by mass, 130 parts by mass of methyl ethyl ketone [Example 5] A release film was produced in the same manner as in Example 1 except that the release layer coating solution p5 (thermosetting composition) was changed to the following.
- Release layer coating solution p5> 10 parts by mass of solid alkyl compound (“Pyroyl” HT from Lion Specialty Chemicals Co., Ltd.) ⁇ Crosslinking agent; Melamine-based cross-linking agent (Sumimar from Sumitomo Chemical Co., Ltd.) 2.5 parts by mass of M66-B) in terms of solids and acid catalyst; 1.8 parts by mass of p-toluenesulfonic acid (“TAYCACURE” AC-700 from Teika Co., Ltd.) and solvent; toluene 400 parts by mass, methyl ethyl ketone 130 parts by mass [Example 6] A release film was produced in the same manner as in Example 1 except that the release layer coating solution p6 (thermosetting composition) was changed to the following.
- ⁇ Release layer coating solution p6> ⁇ Release agent: 10 parts by mass of long-chain alkyl compound (“Pyroyl” HT of Lion Specialty Chemicals Co., Ltd.) in terms of solid content ⁇ Crosslinking agent; Melamine-based crosslinking agent (DIC Co., Ltd.
- Example 7 A release film was produced in the same manner as in Example 1 except that the release layer coating liquid p7 (thermosetting composition) was changed to the following.
- Example 8 A release film was produced in the same manner as in Example 1 except that the release layer coating liquid p8 (thermosetting composition) was changed to the following.
- Long-chain alkyl compound (“Asioresin” RA-80 from Ashio Sangyo Co., Ltd.) is 10 parts by mass in terms of solid content
- melamine cross-linking agent (“Sumimar” M66-B from Sumitomo Chemical Co., Ltd.) is in terms of solid content. 2.5 parts by mass were dissolved in toluene to prepare a coating solution having a solid content concentration of 2.0% by mass.
- Example 9 A release film was produced in the same manner as in Example 1 except that the release layer coating solution p9 (thermosetting composition) was changed to the following.
- Example 10 A release film was produced in the same manner as in Example 1 except that the release layer coating liquid p10 (thermosetting composition) was changed to the following.
- ⁇ Release layer coating solution p10> A long-chain alkyl compound (“Asioresin” RA-95H from Ashio Sangyo Co., Ltd.) was dissolved in toluene to prepare a coating solution having a solid concentration of 2.0% by mass.
- Example 11 A release film was produced in the same manner as in Example 1 except that the release layer coating liquid p11 (thermosetting composition) was changed to the following.
- ⁇ Release layer coating solution p11> In a four-necked flask equipped with a stirrer, nitrogen introducing tube, cooling tube, and rubber septum, 70 parts by mass of octadecyl methacrylate, 25 parts by mass of butyl acrylate, 5 parts by mass of acrylic acid and 150 parts by mass of toluene were placed. Replaced with nitrogen. Under nitrogen stream, 0.4 part by mass of 2,2-azobisisobutyronitrile was added and heated to 60 ° C. to conduct a polymerization reaction for 24 hours to obtain a viscous solution of an acrylic polymer.
- This acrylic polymer consists of a random copolymer of octadecyl methacrylate, butyl acrylate and acrylic acid, and has an octadecyl group as a long-chain alkyl group on the side chain and a carboxyl group as a functional group.
- the number average molecular weight was 96,000.
- Example 12 A release film was produced in the same manner as in Example 1 except that the release layer coating liquid p12 (thermosetting composition) was changed to the following.
- the reaction was completed by further refluxing for 2 hours.
- the reaction mixture was cooled to about 80 ° C. and added to methanol, the reaction product was precipitated as a white precipitate. This precipitate was filtered off, and 140 parts by mass of xylene was added and heated to dissolve completely. Then, the operation of adding methanol again to cause precipitation was repeated several times, and then the precipitate was washed with methanol and dried and ground.
- Example 13 A release film was produced in the same manner as in Example 1 except that the release layer coating liquid p13 (thermosetting composition) was changed to the following.
- Example 14 A release film was produced in the same manner as in Example 1 except that the polyester film 1 was changed to the polyester film 2 in Example 1.
- Example 15 A release film was produced in the same manner as in Example 1 except that the polyester film 1 was changed to the polyester film 3 in Example 1.
- release layer coating solution p14 active energy ray-curable composition
- one surface surface of surface roughness SRa (1)
- SRa (1) surface of surface roughness SRa (1)
- 300 mJ / cm 2 of ultraviolet rays were irradiated and cured to form a release layer to prepare a release film.
- the thickness of the release layer was 200 nm.
- a polymerization initiator (Irgacure 184 manufactured by Ciba Specialty Chemicals Co., Ltd.) was charged in 10 parts by mass, heated to 100 ° C., and mixed for 1 hour to obtain an active energy ray-curable composition.
- Example 17 A release film was produced in the same manner as in Example 16 except that the release layer coating solution p15 (active energy ray-curable composition) was changed to the following.
- a polymerization initiator (Irgacure 184 manufactured by Ciba Specialty Chemicals Co., Ltd.) was charged in 10 parts by mass, heated to 100 ° C., and mixed for 1 hour to obtain an active energy ray-curable composition.
- a coating solution was prepared by setting the composition to a solid content concentration of 4% by mass with a mixed solvent of toluene and isopropyl alcohol (toluene: IPA 3: 1 (mass ratio)).
- Example 1 A release film was produced in the same manner as in Example 1 except that the polyester film 1 was changed to the polyester film 4 in Example 1.
- Example 2 A release film was produced in the same manner as in Example 1 except that the polyester film 1 was changed to the polyester film 5 in Example 1.
- Example 3 A release film was produced in the same manner as in Example 1 except that the polyester film 1 was changed to the polyester film 6 in Example 1.
- Example 4 A release film was prepared in the same manner as in Example 1 except that the release layer coating liquid p16 (thermosetting composition) was changed to the following.
- KS847H manufactured by Shin-Etsu Chemical Co., Ltd.
- PL-50T manufactured by Shin-Etsu Chemical Co., Ltd.
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
[1]基材フィルムの一方の面に離型層を有する離型フィルムであって、離型層が非シリコーン系化合物を主成分として含有し、かつ離型層の表面粗さSRa(A)が10nm未満であり、離型フィルムの離型層を有する面とは反対面の表面粗さSRa(B)が10nm未満である、離型フィルム。
[2]基材フィルムの厚みが30μm未満である、[1]に記載の離型フィルム。
[3]離型フィルムのヘイズ値が1.5%未満である、[1]または[2]に記載の離型フィルム。
[4]基材フィルムが3層積層構造である、[1]~[3]のいずれかに記載の離型フィルム。
[5]基材フィルムが、A層/B層/A層からなる3層積層構造である、[4]に記載の離型フィルム。
[6]基材フィルムが3層積層構造であり、両側の表面層の厚みがいずれも0.1~2.0μmである、[4]または[5]に記載の離型フィルム。
[7]基材フィルムが3層積層構造であり、両側の表面層がいずれも、平均粒子径が0.2~0.7μmの粒子を含有する、[4]~[6]のいずれかに記載の離型フィルム。
[8]前記非シリコーン系化合物が長鎖アルキル化合物である、[1]~[7]のいずれかに記載の離型フィルム。
[9]離型層表面の剥離力が7N/50mm以下である、[1]~[8]のいずれかに記載の離型フィルム。
[10]離型層の表面自由エネルギーが20~35mJ/m2の範囲である、[1]~[9]のいずれかに記載の離型フィルム。
[11]離型層が、少なくとも長鎖アルキル化合物およびメラミン化合物を含有する熱硬化性組成物の硬化層である、[1]~[10]のいずれかに記載の離型フィルム。
[12]離型層が、少なくとも長鎖アルキル化合物を含有する活性エネルギー線硬化性組成物の硬化層である、[1]~[10]のいずれかに記載の離型フィルム。
[13]長鎖アルキル化合物が、分子中にエチレン性不飽和基と長鎖アルキル基を有する化合物である、[12]に記載の離型フィルム。
(i)離型層には粒子(フィラー)を含有させない、
(ii)離型層に粒子(フィラー)を含有させる場合は、粒子径や含有量を調整する、
(iii)基材フィルムの離型層が積層される面(A)を平滑にする、
などが挙げられる。
(1)表面粗さSRaの測定
離型フィルムあるいは基材フィルムの表面粗さSRaは、光干渉型顕微鏡((株)菱化システム社製、VertScan2.0、型式:R5300 GL-Lite-AC)を用いて、観察モード=Waveモード、面補正=4次、フィルター=530nmWhite、対物レンズ=50倍、測定領域=252.69×189.53μmにて表面形態観察し、求めた。測定は1水準につき10回行い、その平均値から求めた。
JIS K 7136(2000)に基づき、日本電色工業(株)製の濁度計「NDH-4000」を用いて離型フィルムのヘイズ値を測定した。測定に際し、離型フィルムの離型層表面に光が入射するように配置する。
離型フィルムの離型層表面にアクリル系粘着テープ(日東電工(株)製の「No.31B」)の粘着面を自重5kgのゴムローラーで押さえながら一往復させて貼り合わせ、室温(23±2℃)で24時間放置後、引張り試験機にて、300mm/minの速度で、粘着テープ側を180°に引き剥したときの剥離力を測定した。
基材フィルムの厚みが異なる、実施例1、14、比較例2、3について、上記の剥離力(1)の測定と同様にして剥離力を測定した。但し、測定に際し、離型フィルム側を180°に引き剥した。
離型フィルムの断面観察用サンプルをマイクロサンプリングシステム(日立製FB-2000A)を使用してFIB法により(具体的には「高分子表面加工学」(岩森暁著)p.118~119に記載の方法に基づいて)作製した。透過型電子顕微鏡(日立製H-9000UHRII)により、加速電圧300kVとして、断面観察用サンプルの断面を観察し、基材フィルムおよび離型層の厚みを測定した。
基材フィルムの断面を電子顕微鏡(約2万~5万倍)で観察し、その断面写真から、
無作為に選択した30個の粒子のそれぞれの最大長さを計測し、それらを算術平均した値を粒子の平均粒子径とした。
実施例および比較例で作製した離型フィルム(幅1000mm、巻長さ3000mのロール状の離型フィルム)の最下巻きから100mの箇所でサンプリングして、20cm×30cmのシートサンプルを3枚用意した。
チタン酸バリウム(富士チタン工業(株)の「HPBT-1」)100質量部、ポリビニルブチラール(積水化学(株)の「BL-1」)7質量部、フタル酸ジブチル2質量部、トルエン/メチルエチルケトン(質量比1:1)40質量部に、ガラスビーズを加え、ジェットミルにて20時間混合・分散させた後、濾過してペースト状のセラミックスラリーを調製した。
上記のようにして作製したサンプルの中央部をサイズ15cm×20cmに切り抜いて評価サンプルとした。評価サンプルの反対面から1000ルクスの光を当て、塗工性評価としてピンホールの発生状況を観察した。3枚の評価サンプルのピンホールを合計し、以下の基準で評価した。
A;ピンホールの発生がない。
B;ピンホールが1~2個認められる。
C;ピンホールが3個以上認められる。
(8)離型層の表面自由エネルギーの測定
表面自由エネルギーおよびその各成分(分散力、極性力、水素結合力)の値が既知の3種の液体として、水、ジヨードメタン、1-ブロモナフタレンを用い、23℃、65%RH下で、接触角計DropMasterDM501(協和界面科学(株)製)にて、各液体の離型層上での接触角を測定する。1つの測定面に対し5回測定を行いその平均値を接触角(θ)とする。この接触角(θ)の値および各液体の既知の値(Panzerによる方法IV(日本接着協会誌第15巻、第3号、第96頁に記載)の数値から、北崎・畑の式より導入される下記式を用いて各成分の値を計算する。
ここで、γLd、γLp、γLhは、それぞれ測定液の分散力、極性力、水素結合力の各成分を表し、θは測定面上での測定液の接触角を表し、また、γSd、γSp、γShは、それぞれ積層膜表面の分散力、極性力、水素結合力の各成分の値を表し、γLは各液体の表面エネルギーを表す。既知の値およびθを上記の式に代入して得られた連立方程式を解くことにより、測定面(離型層表面)の3成分の値を求める。
[基材フィルムの作製]
幅1000mm、巻長さ3000mのロール状のポリエステルフィルム1~5を作製した。
(ポリエステルペレットaの調製)
ジメチルテレフタレート(DMT)に、DMT1モルに対して1.9モルのエチレングリコールと、DMT100質量部に対して0.05質量部の酢酸マグネシウム・4水塩と、0.015質量部のリン酸を加えて加熱エステル交換を行い、エステル交換反応物aを得た。引き続きDMT100質量部に対して三酸化アンチモンを0.025質量部加え、加熱昇温し真空化で重縮合反応を行い、固有粘度0.62のポリエステルペレットaを得た。
凝集アルミナとしてδ型-アルミナを10質量%含むエチレングリコールを、サンドグラインダーを用い、粉砕、分散処理を行い、さらに捕集効率95%の3μmフィルターで濾過してエチレングリコールスラリーを得た。これを前記と同様に調製したエステル交換反応物aに添加し、引き続き三酸化アンチモンを加え、重縮合反応を行い、凝集アルミナを2質量%含有する、固有粘度0.62のポリエステルペレットbを得た。
上記と同様にして調製したポリエステルペレットaに、平均粒子径が0.45μmのビニルベンゼン/スチレン共重合架橋粒子の水スラリーを、ベント式二軸混練機を用いて、前記架橋粒子を1質量%含有するポリエステルペレットcを得た。
上記と同様にして調製したポリエステルペレットaに、平均粒子径が0.20μmのビニルベンゼン/スチレン共重合架橋粒子の水スラリーを、ベント式二軸混練機を用いて、前記架橋粒子を1質量%含有するポリエステルペレットdを得た。
上記と同様にして調製したポリエステルペレットaに、平均粒子径が0.80μmのビニルベンゼン/スチレン共重合架橋粒子の水スラリーを、ベント式二軸混練機を用いて、前記架橋粒子を1質量%含有するポリエステルペレットeを得た。
3層積層構造(A層/B層/A層)からなるポリエステルフィルムを以下の要領で作製した。
・A層;原料として、ポリエステルペレットa、ポリエステルペレットbおよびポリエステルペレットcを混合し、凝集アルミナを0.7質量%、ジビニルベンゼン/スチレン共重合架橋粒子を0.03質量%含有するポリエステルAを調製した。
・B層;原料として、ポリエステルペレットaを用いてポリエステルBを調製した。
ポリエステルフィルム1の作製において、両面のポリエステルA層の厚みはそれぞれ0.6μm、B層の厚みは36.8μmに変更する以外は、ポリエステルフィルム1と同様にして、総厚みが38μmのポリエステルフィルム2を作製した。
ポリエステルフィルム1の作製において、ポリエステルペレットcをポリエステルペレットdに変更する以外は、ポリエステルフィルム1と同様にしてポリエステルフィルム3を作製した。
3層積層構造(A層/B層/C層)からなるポリエステルフィルムを以下の要領で作製した。
・A層;A層の原料として、ポリエステルペレットa、ポリエステルペレットbおよびポリエステルペレットcを混合し、凝集アルミナを0.7質量%、ジビニルベンゼン/スチレン共重合架橋粒子を0.03質量%含有するポリエステルAを調製した。
・B層;B層の原料として、ポリエステルペレットaを用いてポリエステルBを調製した。
・C層;C層の原料として、ポリエステルペレットa、ポリエステルペレットbおよびポリエステルペレットeを混合し、凝集アルミナを0.7質量%、ジビニルベンゼン/スチレン共重合架橋粒子を0.13質量%含有するポリエステルCを調製した。
東レ(株)のポリエステルフィルム(“ルミラー(登録商標)” R80)を用いた。このポリエステルフィルムは、総厚みが38μm、表面粗さSRa(1)が7nm、表面粗さSRa(2)が25nm、ヘイズ値が9.0%であった。
東レ(株)のポリエステルフィルム(“ルミラー(登録商標)” R75X)を用いた。このポリエステルフィルムは、総厚みが38μm、表面粗さSRa(1)およびSRa(2)はそれぞれ25nm、ヘイズ値が5.0%であった。
ポリエステルフィルム1の一方の面(表面粗さSRa(1)の面)に、下記の離型層塗工液p1(熱硬化性組成物)をグラビアコーターで塗布し、100℃で予備乾燥後、160℃で加熱乾燥し、離型層を形成して離型フィルムを作製した。離型層の厚みは100nmであった。
・離型剤;長鎖アルキル化合物(ライオン・スペシャリティ・ケミカルズ(株)の「ピーロイル」1050)を固形分換算で10質量部
・架橋剤;メラミン系架橋剤(三井化学(株)の「ユーバン」28-60)を固形分換算で2.5質量部
・酸触媒;p-トルエンスルホン酸(テイカ(株)の「TAYCACURE」AC-700)を固形分換算で1.3質量部
・溶媒;トルエンを400質量部、メチルエチルケトンを130質量部
[実施例2]
下記の離型層塗工液p2(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
・離型剤;長鎖アルキル化合物(ライオン・スペシャリティ・ケミカルズ(株)の「ピーロイル」1050)を固形分換算で10質量部
・架橋剤;メラミン系架橋剤(住友化学(株)の「スミマール」M66-B)を固形分換算で2.5質量部
・酸触媒;p-トルエンスルホン酸(テイカ(株)の「TAYCACURE」AC-700)を固形分換算で1.3質量部
・溶媒;トルエンを400質量部、メチルエチルケトンを130質量部
[実施例3]
下記の離型層塗工液p3(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
・離型剤;長鎖アルキル化合物(ライオン・スペシャリティ・ケミカルズ(株)の「ピーロイル」1050)を固形分換算で10質量部
・架橋剤;メラミン系架橋剤(DIC(株)の商品名「スーパーベッカミンG」821)を固形分換算で2.5質量部
・酸触媒;p-トルエンスルホン酸(テイカ(株)の「TAYCACURE」AC-700)を固形分換算で1.3質量部
・溶媒;トルエンを400質量部、メチルエチルケトンを130質量部
[実施例4]
下記の離型層塗工液p4(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
・離型剤;長鎖アルキル化合物(ライオン・スペシャリティ・ケミカルズ(株)の「ピーロイル」HT)を固形分換算で10質量部
・架橋剤;メラミン系架橋剤(三井化学(株)の「ユーバン」28-60)を固形分換算で2.5質量部
・酸触媒;p-トルエンスルホン酸(テイカ(株)の「TAYCACURE」AC-700)を固形分換算で1.8質量部
・溶媒;トルエンを400質量部、メチルエチルケトンを130質量部
[実施例5]
下記の離型層塗工液p5(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
・離型剤;長鎖アルキル化合物(ライオン・スペシャリティ・ケミカルズ(株)の「ピーロイル」HT)を固形分換算で10質量部
・架橋剤;メラミン系架橋剤(住友化学(株)の「スミマール」M66-B)を固形分換算で2.5質量部
・酸触媒;p-トルエンスルホン酸(テイカ(株)の「TAYCACURE」AC-700)を固形分換算で1.8質量部
・溶媒;トルエンを400質量部、メチルエチルケトンを130質量部
[実施例6]
下記の離型層塗工液p6(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
・離型剤;長鎖アルキル化合物(ライオン・スペシャリティ・ケミカルズ(株)の「ピーロイル」HT)を固形分換算で10質量部
・架橋剤;メラミン系架橋剤(DIC(株)の商品名「スーパーベッカミンG」821)を固形分換算で2.5質量部
・酸触媒;p-トルエンスルホン酸(テイカ(株)の「TAYCACURE」AC-700)を固形分換算で1.8質量部
・溶媒;トルエンを400質量部、メチルエチルケトンを130質量部
[実施例7]
下記の離型層塗工液p7(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
長鎖アルキル化合物(アシオ産業(株)の「アシオレジン」RA-80)を固形分換算で10質量部、メラミン系架橋剤(三井化学(株)の「ユーバン」28-60)を固形分換算で2.5質量部を、トルエンで溶解して、固形分濃度2.0質量%の塗工液を調製した。
下記の離型層塗工液p8(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
長鎖アルキル化合物(アシオ産業(株)の「アシオレジン」RA-80)を固形分換算で10質量部、メラミン系架橋剤(住友化学(株)の「スミマール」M66-B)を固形分換算で2.5質量部を、トルエンで溶解して、固形分濃度2.0質量%の塗工液を調製した。
下記の離型層塗工液p9(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
長鎖アルキル化合物(アシオ産業(株)の「アシオレジン」RA-80)を固形分換算で10質量部、メラミン系架橋剤(DIC(株)の商品名「スーパーベッカミンG」821)を固形分換算で2.5質量部を、トルエンで溶解して、固形分濃度2.0質量%の塗工液を調製した。
下記の離型層塗工液p10(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
長鎖アルキル化合物(アシオ産業(株)の「アシオレジン」RA-95H)をトルエンで溶解して、固形分濃度2.0質量%の塗工液を調製した。
下記の離型層塗工液p11(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
撹拌機、窒素導入管、冷却管、ラバーセプタムを備えた4つ口フラスコに、オクタデシルメタクリレート70質量部、アクリル酸ブチル25質量部、アクリル酸5質量部およびトルエン150質量部を入れ、系内を窒素置換した。これに窒素気流下、2,2-アゾビスイソブチロニトリル0.4質量部を加え、60℃に加熱して24時間重合反応を行い、アクリル系重合体の粘稠溶液を得た。このアクリル系重合体は、オクタデシルメタクリレートとアクリル酸ブチルとアクリル酸とのランダム共重合体からなり、側鎖に長鎖アルキル基としてオクタデシル基を有するとともに、官能基としてカルボキシル基を有するものであり、数平均分子量は9.6万であった。
下記の離型層塗工液p12(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
下記の長鎖アルキル化合物10質量部を、トルエン400質量部とメチルエチルケトン130質量部で溶解して調製した。
4つ口フラスコにキシレン200質量部、オタデシルイソシアネート600質量部を加え、攪拌下に加熱した。キシレンが還流し始めた時点から、ポリビニルアルコール(平均重合度500、ケン化度88モル%)100質量部を少量ずつ10分間隔で約2時間にわたって加えた。
下記の離型層塗工液p13(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
アルキル化メラミンホルムアルデヒド樹脂(三羽研究所製、商品名「RP-30」;直鎖オクチル基を1分子中に5~6個有するメラミンとホルムアルデヒドとの付加縮合物である直鎖オクチル化メラミンホルムアルデヒド樹脂)を固形分換算で10質量部をトルエン/メチルエチルケトン混合溶液(混合質量比3:1)に溶解した後、p-トルエンスルホン酸(テイカ(株)の「TAYCACURE」AC-700)を固形分換算で0.3質量部添加し、固形分濃度3質量%の塗工液溶液を調製した。
実施例1において、ポリエステルフィルム1をポリエステルフィルム2に変更する以外は、実施例1と同様にして離型フィルムを作製した。
実施例1において、ポリエステルフィルム1をポリエステルフィルム3に変更する以外は、実施例1と同様にして離型フィルムを作製した。
ポリエステルフィルム1の一方の面(表面粗さSRa(1)の面)に、下記の離型層塗工液p14(活性エネルギー線硬化性組成物)をグラビアコーターで塗布し、100℃で乾燥後、紫外線を300mJ/cm2照射し硬化させて離型層を形成して離型フィルムを作製した。離型層の厚みは200nmであった。
下記合成の活性エネルギー線硬化性長鎖アルキル化合物を25質量部、他の活性エネルギー線硬化性化合物としてジペンタエリスリトールヘキサアクリレート(ダイセルサイテック(株)の商品名「DPHA」)を75質量部、光重合開始剤(チバ・スペシャリティ・ケミカルズ(株)製イルガキュア184)を10質量部仕込み100℃に昇温してから1時間混合し、活性エネルギー線硬化性組成物を得た。この組成物をトルエンとイソプロピルアルコールの混合溶媒(トルエン:IPA=3:1(質量比))で固形分濃度4質量%にして塗工液を調製した。
撹拌機および温度計を装備したフラスコに、水酸基を有する(メタ)アクリレート化合物(a)として2-ヒドロキシエチルアクリレート(日本触媒(株)の「BHEA」を100質量部、ポリイソシアネート化合物(b)としてジフェニルメタンジイソシアネート(日本ポリウレタン(株)の「ミリオネートMT」)を240質量部、高級アルコール(c)としてステアリルアルコール(新日本理化(株)の「コノール30SS」)26質量部を仕込み、100℃まで昇温して7時間保温して反応させ、IR測定の結果イソシアネート基が消失したことを確認し、反応を終了させた。
下記の離型層塗工液p15(活性エネルギー線硬化性性組成物)に変更する以外は、実施例16と同様にして離型フィルムを作製した。
下記合成の活性エネルギー線硬化性長鎖アルキル化合物を15質量部、他の活性エネルギー線硬化性化合物としてジペンタエリスリトールヘキサアクリレート(ダイセルサイテック(株)の商品名「DPHA」)を85質量部、光重合開始剤(チバ・スペシャリティ・ケミカルズ(株)製イルガキュア184)を10質量部仕込み100℃に昇温してから1時間混合し、活性エネルギー線硬化性組成物を得た。この組成物をトルエンとイソプロピルアルコールの混合溶媒(トルエン:IPA=3:1(質量比))で固形分濃度4質量%にして塗工液を調製した。
撹拌機および温度計を装備したフラスコに、水酸基を有する(メタ)アクリレート化合物(a)として2-ヒドロキシエチルアクリレート(日本触媒(株)の「BHEA」を100質量部、ポリイソシアネート化合物(b)としてヘキサメチレンジイソシアネート(日本ポリウレタン(株)の商品名「HDI」)を86質量部、高級アルコール(c)としてステアリルアルコール(新日本理化(株)の「コノール30SS」)46質量部を仕込み、100℃まで昇温して7時間保温して反応させ、IR測定の結果イソシアネート基が消失したことを確認し、反応を終了させた。
実施例1において、ポリエステルフィルム1をポリエステルフィルム4に変更する以外は、実施例1と同様にして離型フィルムを作製した。
実施例1において、ポリエステルフィルム1をポリエステルフィルム5に変更する以外は、実施例1と同様にして離型フィルムを作製した。
実施例1において、ポリエステルフィルム1をポリエステルフィルム6に変更する以外は、実施例1と同様にして離型フィルムを作製した。
下記の離型層塗工液p16(熱硬化性組成物)に変更する以外は、実施例1と同様にして離型フィルムを作製した。
付加反応型の硬化性シリコーン樹脂であるKS847H(信越化学工業(株)製)40質量部、硬化剤であるPL-50T(信越化学工業(株)製)0.4質量部をトルエン500質量部、n-ヘプタン500質量部に混合した。
上記で作製した実施例および比較例の離型フィルムについて、上述の測定方法および評価方法に従って評価した。その結果を表1に示す。
Claims (13)
- 基材フィルムの一方の面に離型層を有する離型フィルムであって、離型層が非シリコーン系化合物を主成分として含有し、かつ離型層の表面粗さSRa(A)が10nm未満であり、離型フィルムの離型層を有する面とは反対面の表面粗さSRa(B)が10nm未満である、離型フィルム。
- 基材フィルムの厚みが30μm未満である、請求項1に記載の離型フィルム。
- 離型フィルムのヘイズ値が1.5%未満である、請求項1または2に記載の離型フィルム。
- 基材フィルムが3層積層構造である、請求項1~3のいずれかに記載の離型フィルム。
- 基材フィルムが、A層/B層/A層からなる3層積層構造である、請求項4に記載の離型フィルム。
- 基材フィルムが3層積層構造であり、両側の表面層の厚みがいずれも0.1~2.0μmである、請求項4または5に記載の離型フィルム。
- 基材フィルムが3層積層構造であり、両側の表面層がいずれも、平均粒子径が0.2~0.7μmの粒子を含有する、請求項4~6のいずれかに記載の離型フィルム。
- 前記非シリコーン系化合物が長鎖アルキル化合物である、請求項1~7のいずれかに記載の離型フィルム。
- 離型層表面の剥離力が7N/50mm以下である、請求項1~8のいずれかに記載の離型フィルム。
- 離型層の表面自由エネルギーが20~35mJ/m2の範囲である、請求項1~9のいずれかに記載の離型フィルム。
- 離型層が、少なくとも長鎖アルキル化合物およびメラミン化合物を含有する熱硬化性組成物の硬化層である、請求項1~10のいずれかに記載の離型フィルム。
- 離型層が、少なくとも長鎖アルキル化合物を含有する活性エネルギー線硬化性組成物の硬化層である、請求項1~10のいずれかに記載の離型フィルム。
- 長鎖アルキル化合物が、分子中にエチレン性不飽和基と長鎖アルキル基を有する化合物である、請求項12に記載の離型フィルム。
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