WO2018079337A1 - 剥離シート - Google Patents
剥離シート Download PDFInfo
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- WO2018079337A1 WO2018079337A1 PCT/JP2017/037491 JP2017037491W WO2018079337A1 WO 2018079337 A1 WO2018079337 A1 WO 2018079337A1 JP 2017037491 W JP2017037491 W JP 2017037491W WO 2018079337 A1 WO2018079337 A1 WO 2018079337A1
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- WIPO (PCT)
- Prior art keywords
- release
- release agent
- release sheet
- component
- agent layer
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
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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
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
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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
- B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
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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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62218—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining ceramic films, e.g. by using temporary supports
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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 sheet, and preferably relates to a release sheet on which an adhesive layer of an adhesive sheet is laminated, a release sheet that can be used for manufacturing a ceramic green sheet, and the like.
- a release sheet having a release agent layer provided on the surface of a substrate has been used in the production of an adhesive sheet.
- the pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet on the surface of the release agent layer of the release sheet opposite to the substrate (sometimes referred to as “release surface” in this specification).
- the release agent layer and the base material are laminated by laminating a base material for the pressure-sensitive adhesive sheet on the surface opposite to the release sheet in the pressure-sensitive adhesive layer.
- a ceramic green sheet is formed, and a plurality of obtained ceramic green sheets are stacked and fired.
- a ceramic green sheet can be formed by coating a ceramic slurry containing a ceramic material such as barium titanate or titanium oxide on the release surface of the release sheet as described above.
- the release agent layer is generally formed using a release agent composition containing a release component.
- Patent Documents 1 to 5 disclose release sheets in which a release agent layer is formed using a cationic polymerizable silicone resin as a release component. This cationically polymerizable silicone resin is cured in response to stimuli such as ultraviolet rays in the presence of a cationic polymerization initiator.
- a composition containing a cationically polymerizable silicone resin and a cationic polymerization initiator is applied to one side of a substrate, and the coating film is irradiated with ultraviolet rays.
- a release agent layer is formed by curing the coating film.
- Patent No. 4622079 Japanese Patent No. 5061405 Patent No. 4626055 JP 2012-206509 A Japanese Patent No. 5786798
- the present invention has been made in view of such a situation, and an object thereof is to provide a new release sheet having good release properties.
- the present invention is a release sheet comprising a base material and a release agent layer provided on at least one surface side of the base material, wherein the release agent layer comprises , A cationically polymerizable compound not containing a polysiloxane skeleton, a release component, and a release agent composition containing a cationic polymerization initiator, and the release agent composition contains the cationic polymerizable compound.
- the release sheet characterized in that the amount is larger than each of the blending amount of the release component and the blending amount of the cationic polymerization initiator (Invention 1).
- the release sheet according to the above invention (Invention 1), when the release agent layer is formed, the cationically polymerizable compound contained as a main agent in the release agent composition is cationically polymerized by the action of the cationic polymerization initiator. As a result, the release agent composition is cured, and a release agent layer containing a release component is favorably formed. And a peeling sheet can exhibit favorable peelability by the peeling component contained in a release agent layer.
- the cationically polymerizable compound is preferably an epoxy compound (Invention 2).
- the epoxy compound preferably has three or more epoxy groups in one molecule (Invention 3).
- the epoxy compound preferably has a molecular weight of 200 or more and 2000 or less (Invention 4).
- the release component is preferably at least one selected from the group consisting of a silicone release component, a fluorine release component, and a long-chain alkyl release component (Invention 5). .
- the release component preferably has a reactive group capable of reacting with the cationic polymerizable compound (Invention 6).
- the release component is preferably a reactive polyorganosiloxane (Invention 7).
- the surface free energy measured in the surface opposite to the substrate in the release agent layer is preferably 35 mJ / m 2 or less ( Invention 8).
- the release sheet is for a ceramic green sheet manufacturing process (Invention 9).
- a new release sheet having good release properties is provided.
- a release sheet according to an embodiment of the present invention includes a base material and a release agent layer provided on one surface side of the base material.
- the release agent layer is formed from a release agent composition containing a cationic polymerizable compound not containing a polysiloxane skeleton, a release component, and a cationic polymerization initiator.
- the compounding amount of the cationic polymerizable compound in the release agent composition is larger than both the compounding amount of the release component and the compounding amount of the cationic polymerization initiator. That is, in the release agent composition according to this embodiment, a cationic polymerizable compound is blended as a main agent.
- the release agent layer of the release sheet according to this embodiment is formed by curing the release agent composition described above. This curing is caused by cationic polymerization of a cationically polymerizable compound contained as a main agent by the action of a cationic polymerization initiator. Therefore, the cationically polymerizable compound can be sufficiently polymerized to form a well-cured release agent layer. Furthermore, when the release agent layer contains a release component, the release sheet can exhibit good release properties.
- cation polymerization generally refers to a reaction in which cation becomes an active species and polymerization of a cation polymerizable compound proceeds. This reaction is initiated by a cationic polymerization initiator.
- Base Material The base material in the release sheet according to the present embodiment is not particularly limited, and any one of conventionally known materials can be appropriately selected and used.
- a substrate include polyesters such as polyethylene terephthalate and polyethylene naphthalate, polyolefins such as polypropylene and polymethylpentene, plastic films such as polycarbonate and polyvinyl acetate. These plastic films may be a single layer, or may be a multilayer of two or more layers of the same type or different types.
- a polyester film is preferable, and a polyethylene terephthalate film is particularly preferable. Since the polyethylene terephthalate film hardly generates dust or the like during processing or use, for example, coating defects due to dust or the like can be effectively prevented.
- a surface treatment by an oxidation method or a concavo-convex method or a primer treatment is performed on one side or both sides as desired.
- the oxidation method include corona discharge treatment, plasma discharge treatment, chromium oxidation treatment (wet), flame treatment, hot air treatment, ozone, ultraviolet irradiation treatment, and the like.
- Examples include a thermal spraying method.
- the thickness of the substrate is preferably 10 ⁇ m or more, particularly preferably 15 ⁇ m or more, and further preferably 20 ⁇ m or more.
- the thickness is preferably 300 ⁇ m or less, particularly preferably 200 ⁇ m or less, and more preferably 125 ⁇ m or less.
- the release agent layer is formed of a release agent composition containing a cationic polymerizable compound, a release component, and a cationic polymerization initiator.
- Cationic polymerizable compound As the cationic polymerizable compound, a compound that can form a polymer by cationic polymerization and does not contain a polysiloxane skeleton can be used.
- the polysiloxane skeleton refers to a skeleton in which silicon atoms and oxygen atoms connected by covalent bonds exist alternately, and specifically refers to a structure represented by the following general formula (1).
- each R is a hydrogen atom or an organic group, and n is any positive integer.
- the cationically polymerizable compound examples include compounds having a cyclic ether such as an epoxy group and an oxetanyl group, and in particular, an epoxy compound having an epoxy group is used because there are many types of polyfunctional compounds. It is preferable.
- the above epoxy compound preferably has three or more epoxy groups in one molecule.
- the epoxy compound preferably has 10 or less epoxy groups in one molecule, particularly preferably 9 or less epoxy groups, and more preferably 8 or less epoxy groups. It is preferable that it has.
- the number of epoxy groups in one molecule is 3 or more, the epoxy compound is easily cationically polymerized, thereby easily forming a release agent layer in which the release agent composition is well cured.
- the release agent layer exhibits excellent solvent resistance, and blocking is less likely to occur when the release sheet according to this embodiment is wound up.
- favorable compatibility with a peeling component is obtained because the number of epoxy groups in one molecule is 10 or less.
- the molecular weight of the epoxy compound is preferably 200 or more, particularly preferably 250 or more, and more preferably 300 or more.
- the epoxy compound preferably has a molecular weight of 2000 or less, particularly preferably 1500 or less, and more preferably 1250 or less.
- repelling hardly occurs on the coated surface when the release agent composition is coated on the substrate.
- the molecular weight of the epoxy compound is 2000 or less, the viscosity of the release agent composition or the coating liquid containing the release agent composition becomes relatively low. Therefore, by using the release agent composition or the coating liquid, it is possible to form a release agent layer that is excellent in smoothness with generation of streak defects and the like on the surface.
- polyhydric alcohols constituting glycidyl ethers of other polyhydric alcohols include glycerin, diglycerol, sugar alcohols, butanediol, polyethylene glycol, polypropylene glycol, biphenyl skeleton, dicyclohexadiene skeleton, naphthalene skeleton, etc.
- a polyhydric alcohol is mentioned.
- epoxy compounds having 3 or more epoxy groups in one molecule are preferable.
- the epoxy compound having 3 or more epoxy groups in one molecule glycidyl ethers of alcohols having a trivalent or higher hydroxyl group are preferable.
- examples of such alcohols include glycerin (trivalent), diglycerol (tetravalent), trimethylolpropane (trivalent), ditrimethylolpropane (tetravalent), pentaerythritol (tetravalent), dipentaerythritol (tetravalent).
- Sugar alcohols such as erythritol (tetravalent), xylitol (pentavalent), arabitol (pentavalent), sorbitol (hexavalent), mannitol (hexavalent), galactitol (hexavalent), bisphenol A diglycerol ether
- erythritol tetravalent
- xylitol pentavalent
- arabitol pentavalent
- sorbitol hexavalent
- mannitol hexavalent
- galactitol hexavalent
- bisphenol A diglycerol ether examples thereof include ring-opening compounds of the above-described epoxy compounds such as (tetravalent).
- epoxy compounds can be used singly or in combination of two or more.
- diglycerol polyglycidyl ether or sorbitol polyglycidyl ether which is glycidyl ether of diglycerol, from the viewpoint of high reactivity and availability.
- the cationic polymerizable compound is blended as a main agent.
- the cationic polymerization of the cationic polymerizable compound effectively proceeds, and as a result, the release agent layer is favorably formed.
- the blending amount of the cationic polymerizable compound in the release agent composition is preferably more than 50% by mass, particularly preferably 75% by mass or more, and more preferably 90% by mass or more. preferable. Further, the blending amount is preferably 99.9% by mass or less, particularly preferably 99.75% by mass or less, and further preferably 99.5% by mass or less.
- the blending amount is more than 50% by mass, a sufficient amount of the cationic polymerizable compound to form a network (three-dimensional network structure) of the polymer of the cationic polymerizable compound, and the release agent layer is sufficiently cured. It will be easier to get.
- the blending amount is 99.9% by mass or less, the blending amount of the cationic polymerization initiator and the release component can be relatively increased, and the cationic polymerization can easily proceed effectively. It becomes easy to achieve a desired peelability.
- the release component is not particularly limited as long as it can impart release properties to the release agent layer.
- a silicone release component, a fluorine release component, a long-chain alkyl release component, and an alkyd release At least one selected from the group consisting of a component, an olefin-based release component, an acrylic release component, and a rubber-based release component can be used.
- at least one selected from the group consisting of a silicone-based release component, a fluorine-based release component, and a long-chain alkyl-based release component is used from the viewpoint of easily imparting a desired release property to the release agent layer. It is preferable to use a silicone release component.
- the peeling component preferably has a reactive group capable of reacting with the cationic polymerizable compound.
- the release component in the release agent layer, the release component can be fixed to a polymer formed by cationic polymerization of the cationically polymerizable compound.
- a better network is formed in the release agent layer, the curability is further improved, and the release component from the release agent layer is applied to the object on which the release surface of the release sheet according to the present invention is laminated. Can be suppressed.
- the reactive group is not particularly limited as long as it can react with a cationically polymerizable compound, and examples thereof include an epoxy group, an amino group, a mercapto group, a carboxyl group, and an anhydrous carboxyl group.
- the peeling component preferably has the same reactive group as the reactive group.
- the release component is excellent in reactivity with the cationic polymerizable compound, and is easily incorporated into the above-described network in the release agent layer by chemical bonding.
- the peeling component also has an epoxy group as a reactive group.
- the position of the reactive group in the peeling component is not particularly limited.
- the reactive group is located at the end of the linear structure.
- the reactive group may be located, or the reactive group may be located in the side chain of the linear structure. When located at the end, it may be located at one end of the linear structure, or may be located at both ends.
- the side chain itself may be a reactive group, or a part of the side chain may be a reactive group.
- the reactive group may be located in both the terminal and the side chain.
- the peeling component has a reactive group at least as a side chain. Accordingly, in the release agent layer, a three-dimensional network structure including the release component is easily formed, and the release component is difficult to move from the release agent layer to the target on which the release surface of the release sheet according to the present invention is laminated. Become.
- the release component is preferably a silicone release component as described above, and particularly preferably a reactive polyorganosiloxane.
- the reactive polyorganosiloxane is excellent in reactivity with the cationic polymerizable compound, and more excellent peelability can be achieved by using the reactive polyorganosiloxane. As a result, it is possible to obtain a release sheet that has a well-cured release agent layer and that exhibits more excellent release properties.
- the weight average molecular weight of the reactive polyorganosiloxane is preferably 1000 or more, particularly preferably 1500 or more, and more preferably 2000 or more.
- the weight average molecular weight is preferably 100,000 or less, particularly preferably 50000 or less, and more preferably 25000 or less.
- the release agent composition or the coating solution containing the release agent composition has a relatively low viscosity, and the release agent composition or the coating solution is used.
- Preferred examples of the reactive polyorganosiloxane include epoxy-modified polydimethylsiloxane.
- an epoxy-modified polymer having an epoxy group in the side chain from the viewpoint that the surface condition of the coating film by the coating composition containing the release agent composition or the release agent composition is excellent and the coating film has excellent curability.
- Preference is given to using dimethylsiloxane.
- epoxy-modified polydimethylsiloxane for example, a commercially available compound can be used.
- Product names of such compounds include the product name “X-22-343” and the product name “KF-101”, both of which are sold by Shin-Etsu Chemical Co., Ltd. as epoxy compounds having an epoxy group in the side chain.
- Examples of the epoxy compound having an epoxy group at both ends include a product name “X-22-163C” and a product name “X-22-169B”, all of which are sold by Shin-Etsu Chemical Co., Ltd.
- the compounding amount of the cationic polymerizable compound is larger than the compounding amount of the release component in the release agent composition.
- the cationic polymerization of the cationically polymerizable compound contained as the main agent effectively proceeds, and as a result, the release agent layer is formed satisfactorily.
- the blending amount of the release component in the release agent composition is preferably 0.1 parts by mass or more, particularly preferably 0.25 parts by mass or more, with respect to 100 parts by mass of the cationic polymerizable compound. Furthermore, it is preferably 0.5 parts by mass or more.
- the blending amount of the release component in the release agent composition is preferably 30 parts by mass or less, particularly preferably 20 parts by mass or less, and more preferably 10 parts per 100 parts by mass of the cationic polymerizable compound. It is preferable that it is below mass parts.
- the blending amount of the release component is 0.1 part by mass or more, the release agent layer can exhibit more excellent release properties.
- the compounding quantity of a peeling component is 30 mass parts or less, the compounding quantity of a cationically polymerizable compound becomes relatively large, and, thereby, it becomes easy to obtain the release agent layer hardened
- the cationic polymerization initiator is not particularly limited as long as it can initiate the cationic polymerization of the cationic polymerizable compound.
- the cationic polymerization initiator is preferably one capable of initiating cationic polymerization of the cationic polymerizable compound by at least one of irradiation with active energy rays and heating. By using such a cationic polymerization initiator, the start of cationic polymerization can be controlled, and as a result, a desired release agent layer can be easily formed.
- the active energy rays and heat it is preferable to use the active energy rays from the viewpoint that uniform irradiation is easy and the start of cationic polymerization can be more easily controlled.
- active energy rays ultraviolet rays, electron beams and the like can be used.
- ultraviolet rays are preferably used from the viewpoint of easy handling.
- photoreaction initiators such as sulfonium salts, iodonium salts, phosphonium salts, diazonium salts, ammonium salts, ferrocenes, etc. are preferable, and these are known ones. Can do.
- photoreaction initiators such as sulfonium salts, iodonium salts, phosphonium salts, diazonium salts, ammonium salts, ferrocenes, etc. are preferable, and these are known ones. Can do.
- these compounds may be used individually by 1 type, and may be used in combination of 2 or more types.
- the sulfonium salt photoinitiator includes bis [4- (diphenylsulfonio) phenyl] sulfide bishexafluorophosphate, bis [4- (diphenylsulfonio) phenyl] sulfide bishexafluoroantimonate, bis [4- (Diphenylsulfonio) phenyl] sulfide bistetrafluoroborate, bis [4- (diphenylsulfonio) phenyl] sulfide tetrakis (pentafluorophenyl) borate, diphenyl-4- (phenylthio) phenylsulfonium hexafluorophosphate, diphenyl-4- (Phenylthio) phenylsulfonium hexafluoroantimonate, diphenyl-4- (phenylthio) phenylsulf
- Examples of the iodonium salt-based photoinitiator include diphenyliodonium hexafluorophosphate, diphenyliodonium hexafluoroantimonate, diphenyliodonium tetrafluoroborate, diphenyliodonium tetrakis (pentafluorophenyl) borate, bis (dodecylphenyl) iodonium hexafluorophosphate, Bis (dodecylphenyl) iodonium hexafluoroantimonate, bis (dodecylphenyl) iodonium tetrafluoroborate, bis (dodecylphenyl) iodonium tetrakis (pentafluorophenyl) borate, 4-methylphenyl-4- (1-methylethyl) phenyliodonium Hexafluorophosphate, 4-methylphenyl
- Phosphonium salt photoinitiators include ethyltriphenylphosphonium tetrafluoroborate, ethyltriphenylphosphonium hexafluorophosphate, ethyltriphenylphosphonium hexafluoroantimonate, tetrabutylphosphonium tetrafluoroborate, tetrabutylphosphonium hexafluorophosphate, Tetrabutylphosphonium hexafluoroantimonate and the like are preferable.
- phenyldiazonium hexafluorophosphate phenyldiazonium hexafluoroantimonate
- phenyldiazonium tetrafluoroborate phenyldiazonium tetrakis (pentafluorophenyl) borate, and the like are preferable.
- ammonium salt photoinitiators include 1-benzyl-2-cyanopyridinium hexafluorophosphate, 1-benzyl-2-cyanopyridinium hexafluoroantimonate, 1-benzyl-2-cyanopyridinium tetrafluoroborate, 1-benzyl-2-cyanopyridinium hexafluoroantimonate, Benzyl-2-cyanopyridinium tetrakis (pentafluorophenyl) borate, 1- (naphthylmethyl) -2-cyanopyridinium hexafluorophosphate, 1- (naphthylmethyl) -2-cyanopyridinium hexafluoroantimonate, 1- (naphthylmethyl) ) -2-cyanopyridinium tetrafluoroborate, 1- (naphthylmethyl) -2-cyanopyridinium tetrakis (penta
- Ferrocene photoinitiators include (2,4-cyclopentadien-1-yl) [(1-methylethyl) benzene] -Fe (II) hexafluorophosphate, (2,4-cyclopentadiene-1- Yl) [(1-methylethyl) benzene] -Fe (II) hexafluoroantimonate, (2,4-cyclopentadien-1-yl) [(1-methylethyl) benzene] -Fe (II) tetrafluoroborate (2,4-cyclopentadien-1-yl) [(1-methylethyl) benzene] -Fe (II) tetrakis (pentafluorophenyl) borate and the like are preferable.
- a sulfonium salt or an iodonium salt-based initiator is preferable from the viewpoint of curing speed, stability, and economy. Therefore, among the above-mentioned commercially available products, as the cationic polymerization initiator, Ciba Specialty Chemicals, product name “Irgacure 250”); San Apro, product names “CPI-100P”, “CPI-101A”, “ It is preferable to use “CPI-200K”.
- cationic polymerization initiator one kind may be used alone, or two or more kinds may be used in combination.
- the amount of the cationic polymerization initiator in the release agent composition is preferably 0.1 parts by mass or more, particularly 1 part by mass with respect to 100 parts by mass of the cationic polymerizable compound.
- the amount is preferably at least part, more preferably at least 2 parts by weight.
- the blending amount of the cationic polymerization initiator in the release agent composition is preferably 100 parts by mass or less, particularly preferably 50 parts by mass or less, with respect to 100 parts by mass of the cationic polymerizable compound. Is preferably 40 parts by mass or less.
- the release agent composition may contain an antistatic agent, a reaction inhibitor, an adhesion improver, and the like in addition to the components described above.
- the release agent composition can be produced by mixing the cationic polymerizable compound, the release component, the cationic polymerization initiator, and other components as desired.
- the obtained release agent composition may be diluted with a diluent solvent as necessary to form a coating solution.
- the dilution solvent examples include aliphatic hydrocarbons such as hexane, heptane, and cyclohexane, aromatic hydrocarbons such as toluene and xylene, halogenated hydrocarbons such as methylene chloride and ethylene chloride, methanol, ethanol, propanol, butanol, Alcohols such as 1-methoxy-2-propanol, ketones such as acetone, methyl ethyl ketone, 2-pentanone, isophorone and cyclohexanone, esters such as ethyl acetate and butyl acetate, cellosolve solvents such as ethyl cellosolve and the like are used.
- aliphatic hydrocarbons such as hexane, heptane, and cyclohexane
- aromatic hydrocarbons such as toluene and xylene
- halogenated hydrocarbons such as methylene chloride and
- the concentration / viscosity of the coating solution thus prepared is not particularly limited as long as it can be coated, and can be appropriately selected according to the situation. For example, it is diluted so that the concentration of the release agent composition is 10% by mass or more and 60% by mass or less.
- addition of a dilution solvent etc. is not a necessary condition, and if a viscosity etc. which can be coated with a release agent composition, it is not necessary to add a dilution solvent.
- the thickness of the release agent layer is preferably 10 nm or more, and particularly preferably 50 nm or more.
- the thickness is preferably 10,000 nm or less, and particularly preferably 5000 nm or less.
- the thickness of the release agent layer is 10 nm or more, it becomes easy to achieve a desired release property.
- cured favorably because the thickness of a release agent layer is 10,000 nm or less.
- the surface free energy ( ⁇ total) measured on the surface of the release agent layer opposite to the substrate is preferably 25 mJ / m 2 or more, particularly It is preferably 27 mJ / m 2 or more. Furthermore, the surface free energy is preferably 35 mJ / m 2 or less, and particularly preferably 33 mJ / m 2 or less.
- the free energy is 25 mJ / m 2 or more, the release component and the network are appropriately bonded in the release agent layer, and the release sheet according to the present embodiment is peeled off to the adhesive or the green sheet. It is suppressed that a component transfers.
- the release component is localized near the surface of the release agent layer, and the pressure-sensitive adhesive used in the release sheet according to the present embodiment The peelability from the green sheet can be effectively reduced.
- the maximum protrusion height Rp on the surface opposite to the substrate in the release agent layer is preferably less than 2000 nm, particularly preferably 500 nm or less, and more preferably 50 nm or less. It is preferable that When the maximum protrusion height Rp is less than 2000 nm, the release surface of the release sheet has excellent smoothness. Thereby, the smoothness of the surface which contacts the said peeling surface in the adhesive sheet and ceramic green sheet laminated
- the lower limit value of the maximum protrusion height Rp is not particularly limited, for example, it is preferably 10 nm or more, and particularly preferably 20 nm or more.
- the peel force required to peel off the pressure-sensitive adhesive sheet and the release sheet after affixing the release surface and the pressure-sensitive adhesive surface of the pressure-sensitive adhesive sheet can be appropriately set. 100 mN / 20 mm or more, particularly 150 mN / 20 mm or more. Further, the peeling force is preferably 2000 mN / 20 mm or less, and particularly preferably 1500 mN / 20 mm or less. According to the release sheet according to the present embodiment, the above-described release property can be satisfactorily exhibited by forming the release agent layer using the above-described release agent composition. In addition, the measuring method of the peeling force required when peeling a peeling sheet from an adhesive sheet is as showing to the test example mentioned later.
- the peeling force required for peeling the release sheet from the ceramic green sheet formed on the release surface can be set as appropriate, but may be 5 mN / 20 mm or more. In particular, it is particularly preferably 10 mN / 20 mm or more. Further, the peeling force is preferably 100 mN / 20 mm or less, and particularly preferably 75 mN / 20 mm or less. According to the release sheet according to the present embodiment, the above-described release property can be satisfactorily exhibited by forming the release agent layer using the above-described release agent composition. In addition, the measuring method of the peeling force required when peeling a peeling sheet from a ceramic green sheet is as showing in the test example mentioned later.
- the release sheet according to the present embodiment can be manufactured by a general method. For example, after applying the above-described release agent composition coating liquid on one surface of the substrate, the obtained coating film is cured to form a release agent layer, thereby obtaining a release sheet. it can.
- a gravure coating method for example, a gravure coating method, a bar coating method, a spray coating method, a spin coating method, a knife coating method, a roll coating method, a die coating method and the like can be used.
- the temperature is preferably 100 ° C. or higher, and particularly preferably 120 ° C. or higher. Moreover, it is preferable that the said temperature is 180 degrees C or less, and it is preferable that it is especially 150 degrees C or less.
- the heating time is preferably 10 seconds or longer, and particularly preferably 15 seconds or longer. In addition, the heating time is preferably 60 seconds or less, particularly preferably 30 seconds or less.
- the above coating film can be cured by advancing cationic polymerization of the cationic polymerizable compound.
- the cationic polymerization can be started by performing at least one of irradiation of active energy rays and heating of the coating film according to the kind of the cationic polymerization initiator.
- an ultraviolet ray for example, an ultraviolet ray, an electron beam or the like can be used, and an ultraviolet ray that is easy to handle is particularly preferable.
- Irradiation with ultraviolet rays can be performed with a high-pressure mercury lamp, a xenon lamp, or the like.
- the irradiation amount of ultraviolet rays is preferably 50 mW / cm 2 or more, and particularly preferably 200 mW / cm 2 or more.
- the illuminance is preferably at 5000 mW / cm 2 or less, and particularly preferably 3000 mW / cm 2 or less.
- the amount of ultraviolet rays is preferably 10 mJ / cm 2 or more, and particularly preferably 30 mJ / cm 2 or more.
- the amount is preferably at 250 mJ / cm 2 or less, and more preferably, especially 150 mJ / cm 2 or less.
- the irradiation with the electron beam can be performed by an electron beam accelerator or the like, and the irradiation amount of the electron beam is preferably 0.1 kGy or more, particularly preferably 1 kGy or more.
- the irradiation dose is preferably 50 kGy or less, and particularly preferably 30 kGy or less.
- the cationic polymerization of the cationic polymerizable compound can be effectively advanced, and a well-cured release agent layer can be formed. Moreover, since a release component is contained in the release agent layer thus obtained, the release sheet can exhibit good release properties.
- release sheet according to the present embodiment can be used for the same applications as general release sheets.
- the release sheet according to this embodiment can be used in the production of an adhesive sheet.
- a pressure-sensitive adhesive composition coating liquid for forming the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet is applied on the release surface of the release sheet according to this embodiment, and dried to form a pressure-sensitive adhesive layer.
- the adhesive sheet to which the release sheet was affixed can be manufactured by laminating
- the two release sheets and A double-sided pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer laminated between them can also be produced.
- the produced adhesive sheet can also be protected by a peeling sheet by storing the adhesive sheet in the state where the peeling sheet was stuck.
- the release sheet according to this embodiment can also be used for producing a ceramic green sheet.
- a ceramic slurry containing a ceramic material such as barium titanate or titanium oxide is applied to the release surface of the release sheet, and then the ceramic slurry is dried to obtain a ceramic green sheet to which the release sheet is attached. Can be manufactured.
- the release agent layer is formed using the release agent composition described above.
- the release agent composition is cured by cationic polymerization of the cationic polymerizable compound contained as a main component in the release agent composition by the action of the cationic polymerization initiator.
- the release agent layer containing a release component is formed satisfactorily. Therefore, the release sheet according to the present embodiment exhibits good peelability.
- another layer such as an antistatic layer may be provided between the surface of the release sheet opposite to the release agent layer in the substrate and between the substrate and the release agent layer.
- Example 1 100 parts by mass (solid content conversion) of diglycerol polyglycidyl ether as a cationic polymerizable compound (manufactured by Nagase ChemteX Corporation, product name “Denacol EX-421”, number of epoxy groups in one molecule: 3, molecular weight: 334) Value; the same applies hereinafter) and 1.0 part by mass of polydimethylsiloxane whose side chain as an exfoliating component is epoxy-modified (manufactured by Shin-Etsu Chemical Co., Ltd., product name “KF-101”, weight average molecular weight: 28500), and cationic polymerization Diphenyl [4- (phenylthio) phenyl] sulfonium hexafluorophosphate (manufactured by San Apro, product name “CPI-100P”) as an initiator was mixed with 8.0 parts by mass in methyl ethyl ketone to obtain a solid content of
- the obtained release agent composition coating solution was a biaxially stretched polyethylene terephthalate film (product name “Lumirror S10”, manufactured by Toray Industries, Inc., thickness: 23 ⁇ m, both sides Coating was performed on one side of the maximum protrusion height (Rp: 452 nm) to form a coating film.
- the coating film was heated at 120 ° C. for 15 seconds, the coating film was irradiated with ultraviolet rays from the side opposite to the substrate (illuminance: 1000 mW / cm 2 , light amount: 50 mJ / cm 2 ), and a thickness of 1.0 ⁇ m.
- a release agent layer was formed. This obtained the peeling sheet by which a base material and a releasing agent layer were laminated
- the thickness of the base material and the obtained release agent layer is a value measured using a reflective film thickness meter (manufactured by Filmetrics, product name “F20”).
- Examples 2-6, Comparative Examples 1-2 A release sheet was produced in the same manner as in Example 1 except that the blending amounts of the release component and the cationic polymerization initiator in the release agent composition were changed as shown in Table 1.
- Test Example 2 Evaluation of peelability for adhesive sheet
- an acrylic adhesive tape having a width of 20 mm product manufactured by Nitto Denko Corporation, product
- the name “31B tape” was applied with a 2 kg hand roller.
- the release sheet side was fixed to a stainless steel plate, and 180 ° peeling was performed using a tensile tester (manufactured by Shimadzu Corporation, product name “AG-IS500N”).
- the acrylic adhesive tape side was peeled off at an angle of 300 mm / min, and the force required to peel off (peeling force; mN / 20 mm) was measured.
- the peelability for the pressure-sensitive adhesive sheet was evaluated according to the following criteria. The results are shown in Table 1.
- the release sheet was stored at room temperature for 24 hours and then released.
- the ceramic slurry was uniformly coated using an applicator, and then dried at 80 ° C. for 1 minute in a dryer. As a result, a ceramic green sheet having a thickness of 3 ⁇ m was obtained on the release sheet. In this way, a release sheet with a ceramic green sheet was produced.
- This release sheet with a ceramic green sheet was allowed to stand for 24 hours in an atmosphere of 23 ° C. and 50% RH.
- an acrylic adhesive tape manufactured by Nitto Denko Corporation, product name “31B tape” was applied to the surface of the ceramic green sheet opposite to the release sheet, and cut into a width of 20 mm in that state. This was used as a measurement sample.
- the pressure-sensitive adhesive sheet side of the measurement sample is fixed to a flat plate, using a tensile tester (manufactured by Shimadzu Corporation, product name “AG-IS500N”) at a peeling angle of 180 ° and a peeling speed of 100 mm / min
- the release sheet was peeled off, and the force necessary for peeling off (peeling force; mN / 20 mm) was measured.
- the peelability for the ceramic green sheet was evaluated according to the following criteria. The results are shown in Table 1. ⁇ : The peel force is less than 100 mN / 20 mm. X: The peeling force is 100 mN / 20 mm or more.
- the release sheet according to the example was excellent in the curability of the release agent layer and showed good peelability as compared with the release sheet according to the comparative example.
- the release sheet of the present invention is suitably used as a release sheet on which an adhesive layer of an adhesive sheet is laminated, a release sheet that can be used for producing a ceramic green sheet, and the like.
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Abstract
Description
本発明の一実施形態に係る剥離シートは、基材と、基材の一方の面側に設けられた剥離剤層とを備えて構成される。
本実施形態に係る剥離シートにおける基材としては、特に制限はなく、従来公知のものの中から任意のものを適宜選択して用いることができる。このような基材としては、例えば、ポリエチレンテレフタレートやポリエチレンナフタレート等のポリエステル、ポリプロピレンやポリメチルペンテン等のポリオレフィン、ポリカーボネート、ポリ酢酸ビニルなどのプラスチックフィルムが挙げられる。これらのプラスチックフィルムは、単層であってもよいし、同種又は異種の2層以上の多層であってもよい。これらの中でもポリエステルフィルムが好ましく、特にポリエチレンテレフタレートフィルムが好ましい。ポリエチレンテレフタレートフィルムは、加工時、使用時等において、埃等が発生しにくいため、例えば、埃等による塗工不良等を効果的に防止することができる。
本実施形態に係る剥離シートにおいて、剥離剤層は、カチオン重合性化合物と、剥離成分と、カチオン重合開始剤とを含有する剥離剤組成物から形成されている。
カチオン重合性化合物としては、カチオン重合により重合体を形成することが可能であって、ポリシロキサン骨格を含まない化合物を使用することができる。
(式中、Rはそれぞれ、水素原子または有機基であり、nは、任意の正の整数である。)
剥離成分としては、剥離剤層に剥離性を付与できるものであれば特に制限されず、例えば、シリコーン系剥離成分、フッ素系剥離成分、長鎖アルキル系剥離成分、アルキド系剥離成分、オレフィン系剥離成分、アクリル系剥離成分およびゴム系剥離成分からなる群から選択される少なくとも1種を使用することができる。これらの中でも、剥離剤層に所望の剥離性を付与し易いという観点から、シリコーン系剥離成分、フッ素系剥離成分および長鎖アルキル系剥離成分からなる群から選択される少なくとも1種を使用することが好ましく、特にシリコーン系剥離成分を使用することが好ましい。
カチオン重合開始剤としては、カチオン重合性化合物のカチオン重合を開始させることができるものであれば、特に制限されない。特に、カチオン重合開始剤は、活性エネルギー線の照射および加熱の少なくとも一方により、カチオン重合性化合物のカチオン重合を開始させることができるものであることが好ましい。このようなカチオン重合開始剤を使用することで、カチオン重合の開始を制御することができ、その結果、所望の剥離剤層を容易に形成することが可能となる。活性エネルギー線および熱の中でも、均一に照射することが容易であり、カチオン重合の開始をより容易に制御することが可能であるという観点から活性エネルギー線を使用することが好ましい。また、活性エネルギー線としては、紫外線、電子線等を使用することが可能であるが、これらの中でも、取り扱いが容易であるという観点から紫外線を使用することが好ましい。
剥離剤組成物は、前述した成分の他に、帯電防止剤、反応抑制剤、密着向上剤等を含有していてもよい。
剥離剤組成物は、前述したカチオン重合性化合物と、剥離成分と、カチオン重合開始剤と、所望によりその他の成分とを混合することで製造することができる。得られた剥離剤組成物は、必要に応じて希釈溶媒に希釈し、塗工液としてもよい。
本実施形態に係る剥離シートでは、剥離剤層の厚さが、10nm以上であることが好ましく、特に50nm以上であることが好ましい。また、当該厚さは、10000nm以下であることが好ましく、特に5000nm以下であることが好ましい。剥離剤層の厚さが10nm以上であることで、所望の剥離性を達成し易くなる。また、剥離剤層の厚さが10000nm以下であることで、良好に硬化した剥離剤層を形成し易くなる。
本実施形態に係る剥離シートでは、剥離剤層における基材とは反対側の面において測定される表面自由エネルギー(γtotal)が、25mJ/m2以上であることが好ましく、特に27mJ/m2以上であることが好ましい。また、当該表面自由エネルギーは、35mJ/m2以下であることが好ましく、特に33mJ/m2以下であることが好ましい。当該自由エネルギーが、25mJ/m2以上であることで、剥離剤層内で剥離成分とネットワークとの結合が適度に生じ、本実施形態に係る剥離シートが使用される粘着剤やグリーンシートへ剥離成分が転着してしまうことが抑制される。また、当該表面自由エネルギーが、35mJ/m2以下であることで、剥離成分が剥離剤層表面付近に局在していることになり、本実施形態に係る剥離シートが使用される粘着剤やグリーンシートとの剥離性を効果的に低剥離力とすることができる。
本実施形態に係る剥離シートは、一般的な方法により製造することができる。例えば、基材の一方の面に、前述した剥離剤組成物の塗工液を塗工した後、得られた塗膜を硬化させて剥離剤層を形成することで、剥離シートを得ることができる。
本実施形態に係る剥離シートは、一般的な剥離シートと同様の用途に使用することができる。
カチオン重合性化合物としてのジグリセロールポリグリシジルエーテル(ナガセケムテックス社製,製品名「デナコールEX-421」,1分子中におけるエポキシ基の数:3個,分子量:334)100質量部(固形分換算値;以下同じ)と、剥離成分としての側鎖がエポキシ変性されたポリジメチルシロキサン(信越化学社製,製品名「KF-101」,重量平均分子量:28500)1.0質量部と、カチオン重合開始剤としてのジフェニル[4-(フェニルチオ)フェニル]スルホニウムヘキサフルオロリン酸塩(サンアプロ社製,製品名「CPI-100P」)8.0質量部とをメチルエチルケトン中にて混合し、固形分18質量%の剥離剤組成物の塗布液を得た。
剥離剤組成物中における剥離成分およびカチオン重合開始剤の配合量を表1に示すように変更する以外、実施例1と同様にして剥離シートを製造した。
実施例および比較例で得られた剥離シートの剥離面を、指で10回擦り、曇り(スミア)および剥離剤層の脱落(ラブオフ)の有無を目視にて確認した。そして、以下の判断基準により、剥離剤層の硬化性を評価した。結果を表1に示す。
○…スミアおよびラブオフの両方とも確認されなかった。
×…スミアおよびラブオフの少なくとも一方が確認された。
試験例1において剥離剤層の硬化性について○という評価を得た実施例1~6および比較例2に係る剥離シートについて、その剥離面に、20mm幅のアクリル粘着テープ(日東電工社製,製品名「31Bテープ」)を2kgのハンドローラーによって貼付した。
○…剥離力が500mN/20mm未満である。
×…剥離力が500mN/20mm以上である。
チタン酸バリウム(BaTiO3;堺化学工業社製,製品名「BT-03」)100質量部、ポリビニルブチラール(積水化学工業社製,製品名「エスレックB・KBM-2」)10質量部、およびフタル酸ジオクチル(関東化学社製,製品名「フタル酸ジオクチル鹿1級」)5質量部に、トルエン69質量部およびエタノール46質量部を加え、ボールミルにて混合分散させて、セラミックスラリーを調製した。
○…剥離力が100mN/20mm未満である。
×…剥離力が100mN/20mm以上である。
実施例および比較例で得られた剥離シートにおける剥離剤層側の面の表面自由エネルギー(γtotal)を算出した。具体的には、表面自由エネルギー(γtotal)、および各成分(分散成分γd、極性成分γp、水素結合成分γh)は、接触角が既知である水、ジヨードメタン、およびブロモナフタレンをプローブ液として用い、接触角計にて剥離剤層に対する各プローブ液の接触角を測定し、得られた接触角から、北崎・畑法(北崎寧昭他、日本接着協会誌、Vol.8,No.3,1972,pp.131-141参照)に従って求めた。なお、接触角計としては、接触角計(協和界面科学社製,製品名「全自動接触角計DM-701」)を用いた。結果を表1に示す。
Claims (9)
- 基材と、前記基材の少なくとも一方の面側に設けられた剥離剤層とを備えた剥離シートであって、
前記剥離剤層が、ポリシロキサン骨格を含まないカチオン重合性化合物と、剥離成分と、カチオン重合開始剤とを含有する剥離剤組成物から形成されており、
前記剥離剤組成物中において、前記カチオン重合性化合物の配合量が、前記剥離成分の配合量および前記カチオン重合開始剤の配合量のそれぞれよりも多い
ことを特徴とする剥離シート。 - 前記カチオン重合性化合物は、エポキシ化合物であることを特徴とする請求項1に記載の剥離シート。
- 前記エポキシ化合物は、1分子中に3個以上のエポキシ基を有することを特徴とする請求項2に記載の剥離シート。
- 前記エポキシ化合物は、分子量が200以上、2000以下であることを特徴とする請求項2または3に記載の剥離シート。
- 前記剥離成分は、シリコーン系剥離成分、フッ素系剥離成分および長鎖アルキル系剥離成分からなる群から選択される少なくとも1種であることを特徴とする請求項1~4のいずれか一項に記載の剥離シート。
- 前記剥離成分は、前記カチオン重合性化合物と反応可能な反応性基を有することを特徴とする請求項1~5のいずれか一項に記載の剥離シート。
- 前記剥離成分は、反応性ポリオルガノシロキサンであることを特徴とする請求項6に記載の剥離シート。
- 前記剥離剤層における前記基材とは反対側の面において測定される表面自由エネルギーは、25mJ/m2以上、35mJ/m2以下であることを特徴とする請求項1~7のいずれか一項に記載の剥離シート。
- 前記剥離シートは、セラミックグリーンシート製造工程用であることを特徴とする請求項1~8のいずれか一項に記載の剥離シート。
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JP2021091230A (ja) * | 2017-10-12 | 2021-06-17 | 東洋紡株式会社 | セラミックグリーンシート製造用離型フィルム |
JP2021091229A (ja) * | 2017-10-12 | 2021-06-17 | 東洋紡株式会社 | セラミックグリーンシート製造用離型フィルム |
KR20230098660A (ko) | 2020-12-23 | 2023-07-04 | 도요보 가부시키가이샤 | 수지 시트 성형용 이형 필름 |
KR20230101888A (ko) | 2020-12-23 | 2023-07-06 | 도요보 가부시키가이샤 | 수지 시트 성형용 이형 필름의 제조 방법 |
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KR20230164151A (ko) | 2021-06-30 | 2023-12-01 | 도요보 가부시키가이샤 | 수지 시트 성형용 이형 필름 |
WO2024116437A1 (ja) * | 2022-11-30 | 2024-06-06 | 三井化学東セロ株式会社 | セラミックグリーンシート製造用剥離フィルム |
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WO2024203929A1 (ja) * | 2023-03-30 | 2024-10-03 | 三井化学Ictマテリア株式会社 | セラミックグリーンシートの製造方法 |
Also Published As
Publication number | Publication date |
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JP7466270B2 (ja) | 2024-04-12 |
KR20190062423A (ko) | 2019-06-05 |
JPWO2018079337A1 (ja) | 2019-09-12 |
CN109863023A (zh) | 2019-06-07 |
MY197800A (en) | 2023-07-14 |
SG11201903775RA (en) | 2019-05-30 |
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