WO2013145864A1 - セラミックグリーンシート製造工程用剥離フィルム - Google Patents
セラミックグリーンシート製造工程用剥離フィルム Download PDFInfo
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- WO2013145864A1 WO2013145864A1 PCT/JP2013/052491 JP2013052491W WO2013145864A1 WO 2013145864 A1 WO2013145864 A1 WO 2013145864A1 JP 2013052491 W JP2013052491 W JP 2013052491W WO 2013145864 A1 WO2013145864 A1 WO 2013145864A1
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- release agent
- green sheet
- agent layer
- ceramic green
- release
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/30—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
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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
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
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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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
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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
- B32B2250/02—2 layers
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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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
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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
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/77—Uncured, e.g. green
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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
- B32B2307/732—Dimensional properties
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/46—Block-or graft-polymers containing polysiloxane sequences containing polyether sequences
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2433/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2433/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/005—Presence of polysiloxane in the release coating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
Definitions
- the present invention relates to a release film used in a process for producing a ceramic green sheet.
- a ceramic green sheet is formed, and a plurality of obtained ceramic green sheets are laminated and fired.
- the ceramic green sheet is formed by coating a ceramic slurry containing a ceramic material such as barium titanate or titanium oxide on a release film.
- a release film a film base material having a silicone compound such as polysiloxane released is used.
- the release film is required to have a peelability that allows a thin ceramic green sheet formed on the release film to be peeled off without being broken from the release film.
- the miniaturization and multilayering of multilayer ceramic capacitors and multilayer ceramic substrates have progressed, and the ceramic green sheets have become thinner.
- the thickness of the ceramic green sheet is reduced to a thickness of 3 ⁇ m or less, for example, when the ceramic slurry is applied and dried, defects such as pinholes and uneven thickness tend to occur in the ceramic green sheet. .
- the formed ceramic green sheet is peeled from the release film, problems such as breakage due to a decrease in strength of the ceramic green sheet are likely to occur.
- Patent Document 1 discloses a carrier film (peeling film) having a surface having a maximum height Rmax defined by JIS B0601 of 0.2 ⁇ m or less on the ceramic slurry coating surface. It is proposed to use.
- the present invention has been made in view of such a situation, and can prevent and suppress the occurrence of defects such as pinholes and uneven thickness in the ceramic green sheet, and further, the peelability of the ceramic green sheet
- Another object of the present invention is to provide a release film for a ceramic green sheet manufacturing process that is excellent in the above.
- the present invention is a release film for a ceramic green sheet manufacturing process, comprising a base material and a release agent layer provided on one side of the base material, the release agent The layer is a cured product of a release agent composition containing an active energy ray-curable component and a silicone-based component, and an arithmetic average roughness (Ra) on the surface of the release agent layer on the side opposite to the substrate is 8 nm or less.
- a release film for a ceramic green sheet manufacturing process characterized in that the maximum protrusion height (Rp) is 50 nm or less (Invention 1).
- the surface of a release agent layer becomes highly smooth mainly by the hardened
- the silicone-based component or a cured product thereof is excellent in releasability from the ceramic green sheet.
- the area occupation rate of the coarse protrusion which has protrusion height of 10 nm or more in the surface on the opposite side to the said base material of the said releasing agent layer is 10% or less ( Invention 2).
- the silicone component is preferably a polyorganosiloxane having a reactive functional group (Invention 3).
- the mass ratio of the silicone component in the release agent composition to the total mass of the active energy ray-curable component and the silicone component is 0.7 to 5% by mass.
- the active energy ray-curable component is preferably a (meth) acrylic acid ester (Invention 5).
- the (meth) acrylic acid ester is preferably a trifunctional or higher functional (meth) acrylic acid ester (Invention 6).
- the thickness of the release agent layer is preferably 0.3 to 2 ⁇ m (Invention 7).
- the arithmetic average roughness (Ra) on the surface of the substrate opposite to the release agent layer is 5 to 50 nm, and the maximum protrusion height (Rp) is 30. It is preferable that the thickness is ⁇ 500 nm.
- the surface of the release agent layer becomes highly smooth and effectively prevents / suppresses the occurrence of defects such as pinholes and uneven thickness in the ceramic green sheet. Furthermore, it is excellent in peelability from the ceramic green sheet.
- a release film for ceramic green sheet manufacturing process (hereinafter sometimes simply referred to as “release film”) 1 according to the present embodiment includes a substrate 11 and a first surface of the substrate 11.
- the release agent layer 12 is laminated on the upper surface (the upper surface in FIG. 1).
- the arithmetic average roughness (Ra) on the surface of the release agent layer 12 (the upper surface in FIG. 1; the surface opposite to the substrate 11) on which the ceramic slurry is formed is The maximum protrusion height (Rp) is 8 nm or less.
- the arithmetic average roughness (Ra) and the maximum protrusion height (Rp) in this specification are measured in accordance with JIS B0601-1994 (in the test example, surface roughness measuring machine SV3000S4 (stylus type) manufactured by Mitutoyo Corporation). Measured using).
- the surface of the release agent layer 12 can be made sufficiently smooth and smooth. For example, even when a thin film ceramic green sheet having a thickness of less than 1 ⁇ m is formed on the surface of the release agent layer 12, defects such as pinholes and uneven thickness do not easily occur in the thin film ceramic green sheet, and good sheet forming is possible. Sex is shown. This excellent effect cannot be obtained only by defining the maximum height (Rmax) of the release agent layer 12 as in Patent Document 1.
- the arithmetic average roughness (Ra) of the surface of the release agent layer 12 is preferably 6 nm or less, and particularly preferably 4 nm or less.
- the maximum protrusion height (Rp) on the surface of the release agent layer 12 is preferably 40 nm or less, and particularly preferably 30 nm or less.
- the area occupation ratio of the coarse protrusions having a protrusion height of 10 nm or more on the surface of the release agent layer 12 is preferably 10% or less, particularly preferably 8.5% or less, and more preferably 7%.
- the following is preferable.
- the area occupancy ratio of the coarse protrusions having a protrusion height of 10 nm or more means that the coarse protrusions having a protrusion height of 10 nm or more are parallel to the surface of the release agent layer 12 at a height of 10 nm.
- the ratio of the total area of the cut surface generated when the film is cut out to the area of the surface of the release agent layer 12 is referred to.
- the area occupancy ratio of the coarse protrusions in this specification is observed at 50 magnifications in the PSI mode using an optical interference type surface shape observation device (in the test example, “WYKO-1100” manufactured by Vecco).
- the obtained surface shape image in the range of 91.2 ⁇ 119.8 ⁇ m is binarized by a portion having a protrusion height of 10 ⁇ m or more and the other portion, and a portion having a protrusion height of 10 ⁇ m or more is 10 nm in height.
- the ratio of the area to the total area is calculated as a percentage.
- the release sheet has an area occupancy ratio of more than 10% for the coarse protrusions, there may be rarely higher protrusions (for example, protrusions having a height of around 40 to 50 nm). If the release sheet has an area occupancy of 10% or less, such high protrusions hardly exist. In the ceramic green sheet obtained by using such a release sheet, the occurrence of defects such as pinholes and uneven thickness can be more effectively prevented / suppressed.
- a substrate 11 examples include films made of polyesters such as polyethylene terephthalate and polyethylene naphthalate, polyolefins such as polypropylene and polymethylpentene, polycarbonates, and plastics such as ethylene-vinyl acetate copolymer. It may be a layer, or may be a multilayer of two or more layers of the same type or different types.
- a polyester film is preferable, a polyethylene terephthalate film is particularly preferable, and a biaxially stretched polyethylene terephthalate film is more preferable. Since the polyethylene terephthalate film hardly generates dust or the like during processing or use, for example, it is possible to effectively prevent a ceramic slurry coating failure due to dust or the like.
- the first surface is subjected to a surface treatment such as an oxidation method or a primer treatment.
- a surface treatment such as an oxidation method or a primer treatment.
- 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.
- the corona discharge treatment method is preferably used from the viewpoints of effects and operability.
- the thickness of the substrate 11 is usually 10 to 300 ⁇ m, preferably 15 to 200 ⁇ m, and particularly preferably 20 to 125 ⁇ m.
- the arithmetic average roughness (Ra) on the first surface of the substrate 11 is preferably 2 to 50 nm, and particularly preferably 5 to 30 nm.
- the maximum protrusion height (Rp) on the first surface of the substrate 11 is preferably 10 to 700 nm, and particularly preferably 30 to 500 nm.
- the arithmetic average roughness (Ra) on the second surface of the substrate 11 is 5 to 50 nm.
- the thickness is preferably 10 to 30 nm.
- the maximum protrusion height (Rp) on the second surface of the substrate 11 is preferably 30 to 500 nm, and particularly preferably 50 to 300 nm.
- the arithmetic mean roughness (Ra) of the second surface of the substrate 11 is too small, the second surface is too smooth, and the second surface of the substrate 11 is highly smooth when the release film 1 is wound up.
- the release agent layer 12 is in close contact, and blocking is likely to occur.
- the arithmetic mean roughness (Ra) of the second surface of the substrate 11 is too large, it is difficult to keep the maximum protrusion height (Rp) of the second surface of the substrate 11 in the above preferred low range. May be.
- the maximum protrusion height (Rp) on the second surface of the substrate 11 is too large, the protrusion shape of the second surface of the substrate 11 that adheres to the ceramic green sheet when wound up after the formation of the ceramic green sheet. Is transferred to the ceramic green sheet, and the ceramic green sheet is partially thinned. When a capacitor is produced by stacking the ceramic green sheets, there is a possibility that a problem due to a short circuit occurs.
- the maximum protrusion height (Rp) of the second surface of the base material 11 is too small, the unevenness of the second surface of the base material 11 becomes uniform and the second surface becomes flat.
- the substrate 11 being conveyed may meander or may be unwound when wound into a roll.
- the same layer as the release agent layer 12 to be described later may be provided on the surface opposite to the first surface of the substrate 11 or a layer different from the release agent layer 12 may be provided.
- the 2nd surface of the material 11 points out the surface on the opposite side to the base material 11 side among the surfaces of these layers.
- the maximum protrusion height (Rp) of the first surface of the substrate 11 and the maximum protrusion height (Rp) of the second surface are different, that is, those having different front and back roughnesses may be used.
- the maximum protrusion height (Rp) of the first surface and the maximum protrusion height (Rp) of the second surface may be substantially the same, that is, a surface having the same roughness.
- the release agent layer 12 has desired release properties, and when laminated on the first surface of the substrate 11, the arithmetic average roughness (Ra) and the maximum protrusion height on the surface of the release agent layer 12. (Rp) can be in the above-described range, and is obtained by curing a release agent composition (hereinafter referred to as “release agent composition C”) containing an active energy ray-curable component and a silicone-based component. It is what According to such release agent composition C, the release agent obtained by effectively filling the concave portions between the protrusions present on the first surface of the substrate 11 mainly with the cured product of the active energy ray-curable component.
- release agent composition C containing an active energy ray-curable component and a silicone-based component.
- the surface of the layer 12 can be highly smoothed, and appropriate release properties can be imparted to the surface of the release agent layer 12 by the silicone-based component or a cured product thereof.
- silicone-based component or a cured product thereof.
- the area occupation rate of the coarse protrusion on the surface of the release agent layer 12 is limited to be low by smoothing the surface of the release agent layer 12 with the cured product of the active energy ray-curable component as described above. Becomes easy.
- the active energy ray-curable component is not particularly limited as long as it is a component that is cured by irradiation with active energy rays without impeding the effects of the present invention, and may be any of a monomer, an oligomer, or a polymer, It may be a mixture.
- This active energy ray-curable component is preferably a (meth) acrylic acid ester.
- (meth) acrylic acid ester means both acrylic acid ester and methacrylic acid ester. The same applies to other similar terms.
- the main component of the release agent layer 12 is a cured product of a (meth) acrylic acid ester-based component, the release of the ceramic slurry is less likely to occur in the release agent layer 12.
- the (meth) acrylic acid ester is preferably at least one selected from polyfunctional (meth) acrylate monomers and (meth) acrylate oligomers, and in particular, trifunctional or higher (meth) acrylate monomers and (meth). It is preferably at least one selected from acrylate oligomers, and more preferably trifunctional or higher functional (meth) acrylate monomers.
- trifunctional or higher the curability of the release agent composition C becomes excellent, and the surface release property of the resulting release agent layer 12 becomes more excellent.
- polyfunctional (meth) acrylate monomer examples include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di (meth) ) Acrylate, neopentyl glycol adipate di (meth) acrylate, hydroxypivalic acid neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified phosphoric acid Di (meth) acrylate, allylated cyclohexyl di (meth) acrylate, isocyanurate di (meth) acrylate, trimethylolpropane tri (meth) acrylate, dipentaerythritol Tri (meth) acrylate, dipent
- polyfunctional (meth) acrylate oligomers examples include polyester acrylate oligomers, epoxy acrylate oligomers, urethane acrylate oligomers, polyether acrylate oligomers, polybutadiene acrylate oligomers, and silicone acrylate oligomers.
- Polyester acrylate oligomers can be obtained by, for example, esterifying the hydroxyl groups of polyester oligomers having hydroxyl groups at both ends obtained by condensation of polyvalent carboxylic acids and polyhydric alcohols with (meth) acrylic acid, or polyvalent carboxylic acids. It can be obtained by esterifying the terminal hydroxyl group of an oligomer obtained by adding alkylene oxide to (meth) acrylic acid.
- the epoxy acrylate oligomer can be obtained, for example, by reacting (meth) acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol type epoxy resin or novolak type epoxy resin and esterifying it. Further, a carboxyl-modified epoxy acrylate oligomer obtained by partially modifying an epoxy acrylate oligomer with a dibasic carboxylic acid anhydride can also be used.
- the urethane acrylate oligomer can be obtained, for example, by esterifying a polyurethane oligomer obtained by reaction of polyether polyol or polyester polyol with polyisocyanate with (meth) acrylic acid.
- the polyether acrylate oligomer can be obtained by esterifying the hydroxyl group of the polyether polyol with (meth) acrylic acid.
- polyfunctional (meth) acrylate monomers and polyfunctional (meth) acrylate oligomers can be used singly or in combination of two or more. Moreover, a polyfunctional (meth) acrylate monomer and a polyfunctional (meth) acrylate oligomer can be used in combination.
- one type of active energy ray-curable component may be used alone, or two or more types may be used in combination.
- the silicone-based component is not particularly limited as long as it can impart a desired release property to the surface of the release agent layer 12 without interfering with the effects of the present invention, and is a polyorganosiloxane, preferably a reactive functional group.
- a polyorganosiloxane having a functional group particularly preferably a polydimethylsiloxane having a reactive functional group is used.
- the reactive functional group reacts by irradiation with active energy rays or in a separate reaction step (for example, a heating step), and the polyorganosiloxane (silicone component) It will be incorporated into the cross-linked structure and fixed. Thereby, it is suppressed that the silicone type component in the release agent layer 12 is transferred to the ceramic green sheet formed on the release agent layer 12.
- the reactive functional group may be introduced into one end of the polyorganosiloxane, may be introduced into both ends, or may be introduced into the side chain.
- the reactive functional group include (meth) acryloyl group, vinyl group, maleimide group, epoxy group, carboxyl group, isocyanate group, hydroxyl group and the like.
- one type of silicone component may be used alone, or two or more types may be used in combination.
- the mass ratio of the silicone-based component in the release agent composition C to the total mass of the active energy ray-curable component and the silicone-based component is preferably 0.7 to 5% by mass, particularly 1.0 to 2. It is preferably 5% by mass.
- the ceramic slurry may be easily repelled when the ceramic slurry is applied to the surface of the release agent layer 12. Moreover, it becomes difficult to harden the release agent layer 12, and sufficient peelability may not be obtained.
- the mass ratio of the total mass of the active energy ray-curable component and the silicone component in the total mass of the solids contained in the release agent composition C is preferably 85% by mass or more, and 90% by mass or more. It is particularly preferred. Since the mass ratio of the total mass of the active energy ray-curable component and the silicone-based component is in the above range, the surface of the release agent layer 12 to be formed is highly smooth, and the release agent composition C has sufficient curability. Is easier to obtain.
- the release agent composition C when ultraviolet rays are used as the active energy ray irradiated to the release agent composition C, the release agent composition C preferably further contains a photopolymerization initiator.
- the photopolymerization initiator By containing the photopolymerization initiator in this manner, the active energy ray-curable component (and the silicone component) can be efficiently cured, and the polymerization curing time and the amount of light irradiation can be reduced.
- the photopolymerization initiator examples include benzophenone, acetophenone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzoin benzoic acid, methyl benzoin benzoate, benzoin dimethyl ketal, 2,4 -Diethylthioxanthone, 1-hydroxycyclohexyl phenyl ketone, benzyldiphenyl sulfide, tetramethylthiuram monosulfide, azobisisobutyronitrile, benzyl, dibenzyl, diacetyl, ⁇ -chloranthraquinone, (2,4,6-trimethyl Benzyldiphenyl) phosphine oxide, 2-benzothiazole-N, N-diethyldithiocarbamate and the like.
- 2-hydroxy-1- ⁇ 4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] -phenyl ⁇ -2-methylpropan-1-one which is excellent in surface curability
- 1-hydroxy-cyclohexyl-phenyl-ketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1 -One is preferred, among which 2-hydroxy-2-methyl-1-phenyl-propan-1-one and 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one are particularly preferred preferable. These may be used alone or in combination of two or more.
- the photopolymerization initiator is a total of active energy ray-curable components and active energy ray-curable silicone components (for example, polyorganosiloxane having a (meth) acryloyl group, vinyl group or maleimide group as a reactive functional group). It is preferably used in an amount in the range of 1 to 20 parts by weight, particularly 3 to 15 parts by weight with respect to 100 parts by weight.
- the release agent (including the release agent composition C) constituting the release agent layer 12 may contain silica, an antistatic agent, a dye, a pigment and other additives as necessary. These additives are preferably used in an amount in the range of 0.1 to 10 parts by mass with respect to 100 parts by mass in total of the active energy ray-curable component and the silicone component.
- the thickness of the release agent layer 12 is preferably 0.3 to 2 ⁇ m, particularly preferably 0.5 to 1.5 ⁇ m.
- the thickness of the release agent layer 12 is less than 0.3 ⁇ m, the smoothness of the surface of the release agent layer 12 becomes insufficient, and pinholes and uneven thickness may easily occur in the ceramic green sheet.
- the thickness of the release agent layer 12 exceeds 2 ⁇ m, the release film 1 may be easily curled due to curing shrinkage of the release agent layer 12.
- the release film 1 is rolled up, blocking with the second surface of the substrate 11 is likely to occur, so that winding failure occurs or the amount of charge at unwinding increases, There is a risk that foreign matter may easily adhere.
- the release agent layer 12 is applied to the first surface of the substrate 11 with a release agent solution containing a release agent and, optionally, a diluent, and then dried as necessary and cured by irradiation with active energy rays. Can be formed.
- a release agent solution containing a release agent and, optionally, a diluent
- the reaction can be caused by drying at this time, and the silicone component can be incorporated into the crosslinked structure.
- a method for applying the release agent solution 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, or the like can be used.
- active energy rays ultraviolet rays, electron beams and the like are usually used.
- the dose of the active energy ray varies depending on the type of the energy ray, for example, in the case of ultraviolet rays, preferably 50 ⁇ 1000mJ / cm 2 in quantity, especially 100 ⁇ 500mJ / cm 2 preferably.
- an electron beam about 0.1 to 50 kGy is preferable.
- the active energy ray-curable component in the release agent composition C is cured by irradiation with the active energy ray.
- the silicone component in the release agent composition C has an active energy ray-curable reactive group, the silicone component is also cured.
- a release agent layer 12 that is highly smooth, difficult to repel the ceramic slurry, and excellent in the peelability of the ceramic green sheet is formed.
- the release film 1 As described above, it is possible to effectively prevent and suppress the occurrence of defects such as pinholes and uneven thickness in the obtained ceramic green sheet. Even when the sheet is peeled off, it is possible to effectively prevent or suppress the occurrence of problems such as breakage of the ceramic green sheet.
- another layer may exist between the base material 11 and the release agent layer 12 or on the second surface of the base material 11.
- Example 1 As a base material, a polyethylene terephthalate (PET) film (thickness 31 ⁇ m) having the same roughness was prepared. The arithmetic average roughness (Ra) on both sides of this PET film was 29 nm, and the maximum protrusion height (Rp) was 257 nm.
- the measuring method of arithmetic average roughness (Ra) and maximum protrusion height (Rp) on both surfaces of PET film is the arithmetic average roughness (Ra) and maximum protrusion height (Rp) on the surface of the release agent layer described later. It is the same as the measuring method (the following examples etc. are the same).
- An agent solution (solid content 20% by mass) was obtained.
- the release agent solution was applied to one surface (first surface) of the substrate with a bar coater so that the thickness of the release agent layer after curing was 0.97 ⁇ m, and dried at 80 ° C. for 1 minute. It was. Then, ultraviolet rays were irradiated (accumulated light amount: 250 mJ / cm 2 ), the release agent composition C was cured to form a release agent layer, and this was used as a release film.
- the thickness of the release agent layer is a result measured by a measurement method described later (the following examples and the like are the same).
- Examples 2 to 4 A release film was produced in the same manner as in Example 1 except that the thickness of the release agent layer was changed as shown in Table 1.
- Example 5 A release film was produced in the same manner as in Example 1 except that the mass ratio of the silicone-based component in the release agent composition C was changed as shown in Table 1.
- Example 7 As a base material, a PET film (thickness 31 ⁇ m) having the same front and back roughness was prepared. The arithmetic average roughness (Ra) on both surfaces of this PET film was 15 nm, and the maximum protrusion height (Rp) was 98 nm. A release film was produced in the same manner as in Example 1 except that the above-mentioned base material was used as the base material.
- Example 8 A release film was produced in the same manner as in Example 7 except that the thickness of the release agent layer was changed as shown in Table 1.
- Example 9 A PET film (thickness 31 ⁇ m) having different roughness on the front and back sides was prepared as a substrate.
- the arithmetic mean roughness (Ra) on the first surface of this PET film was 7 nm, and the maximum protrusion height (Rp) was 43 nm. Further, the arithmetic average roughness (Ra) on the second surface was 34 nm, and the maximum protrusion height (Rp) was 250 nm.
- a release film was produced in the same manner as in Example 1 except that the above-mentioned base material was used as the base material.
- Example 1 A release film was produced in the same manner as in Example 1 except that the silicone component was not blended in the release agent composition C.
- thermosetting addition reaction type silicone manufactured by Shin-Etsu Chemical Co., Ltd., KS-847H
- platinum catalyst manufactured by Shin-Etsu Chemical Co., Ltd., CAT-PL-50T
- Test Example 1 Measurement of thickness of release agent layer
- the thickness ( ⁇ m) of the release agent layer of the release films obtained in the examples and comparative examples was measured using a reflective film thickness meter (manufactured by Filmetrics, F20). Specifically, after the release films obtained in Examples and Comparative Examples were cut to 100 ⁇ 100 mm, the release film was installed on the film thickness meter so that the surface opposite to the measurement side was the suction stage side. The film thickness was measured at 10 locations on the surface of the release agent layer, and the average value was defined as the thickness of the release agent layer. The results are shown in Table 1.
- Test Example 3 (Calculation of area occupation ratio of coarse protrusions) The area occupation ratio (%) of the coarse protrusion having a protrusion height of 10 nm or more on the surface of the release agent layer of the release film fixed to the glass plate as in Test Example 2 was calculated. Specifically, using an optical interference type surface shape observation apparatus (Vecco, WYKO-1100), the surface in the range of 91.2 ⁇ 119.8 ⁇ m obtained by observing at a magnification of 50 in the PSI mode.
- Vecco optical interference type surface shape observation apparatus
- the shape image is binarized by a portion having a protrusion height of 10 ⁇ m or more and the other portion, and the percentage of the area of the obtained protrusion height of 10 ⁇ m or more to the total area is set to a height of 10 nm or more.
- the area occupancy (%) of coarse protrusions having a protrusion height of 5 mm was used. The results are shown in Table 1.
- the ceramic slurry was applied over a width of 250 mm and a length of 10 m so that the film thickness after drying with a die coater was 1 ⁇ m. And dried at 80 ° C. for 1 minute in a dryer.
- the fluorescent lamp was illuminated from the release film side, all the coated ceramic green sheet surfaces were visually inspected, and slurry coating property was evaluated by the following judgment criteria. The results are shown in Table 1. A ... There was no pinhole in the ceramic green sheet B ... 1-5 pinholes occurred in the ceramic green sheet C ... More than 6 pinholes occurred in the ceramic green sheet
- Test Example 8 (Peelability evaluation) A ceramic green sheet molded on the surface of the release agent layer of the release film by the same procedure as in Test Example 7 was punched out to 200 mm ⁇ 200 mm without punching the release film. Next, using the sheet peeling mechanism of the green sheet laminating machine, the punched green sheet was adsorbed on a vacuum suction stage and peeled from the release film. The peelability of the ceramic green sheet at this time was evaluated according to the following criteria. The results are shown in Table 1. A: The ceramic green sheet can be peeled off smoothly without tearing, and the ceramic green sheet did not remain on the release agent layer. B: The ceramic green sheet could be peeled off slightly without being broken, and on the release agent layer. There was no ceramic green sheet left on the surface. C ... The ceramic green sheet was torn or could not be peeled off.
- Test Example 9 (Defect evaluation on the surface of the release agent layer) The thickness after drying a coating solution prepared by dissolving polyvinyl butyral resin in a mixed solution of toluene and ethanol (mass ratio 6: 4) on the release agent layer of the release film obtained in Examples and Comparative Examples. was coated at 1 ⁇ m and dried at 80 ° C. for 1 minute to form a polyvinyl butyral resin layer. And the polyester tape was stuck on the surface of the polyvinyl butyral resin layer.
- the release film was peeled from the polyvinyl butyral resin layer, and the depressions on the surface of the polyvinyl butyral resin layer that had been in contact with the release agent layer of the release film were counted.
- an optical interference type surface shape observation apparatus Vecco, WYKO-1100
- the surface in the range of 91.2 ⁇ 119.8 ⁇ m obtained by observing at a magnification of 50 in the PSI mode. Based on the shape image, dents with a depth of 150 nm or more were counted, and defects on the surface of the release agent layer were evaluated according to the following criteria.
- the release films obtained in the examples were free from defects due to the surface of the release agent layer and from the back surface of the base material, and were excellent in the peelability of the ceramic green sheet.
- the release film for the ceramic green sheet production process of the present invention is particularly suitable for forming a thin film ceramic green sheet having a thickness of 1 ⁇ m or less.
Abstract
Description
図1に示すように、本実施形態に係るセラミックグリーンシート製造工程用剥離フィルム(以下、単に「剥離フィルム」という場合がある。)1は、基材11と、基材11の第1の面(図1では上面)の上に積層された剥離剤層12とを備えて構成される。
基材として、表裏同粗度のポリエチレンテレフタレート(PET)フィルム(厚さ31μm)を用意した。このPETフィルムの両面における算術平均粗さ(Ra)は29nmであり、最大突起高さ(Rp)は257nmであった。なお、PETフィルムの両面における算術平均粗さ(Ra)および最大突起高さ(Rp)の測定方法は、後述する剥離剤層表面における算術平均粗さ(Ra)および最大突起高さ(Rp)の測定方法と同様である(以下の実施例等も同じ)。
剥離剤層の厚さを表1に示すように変更した以外は、実施例1と同様にして剥離フィルムを作製した。
剥離剤組成物Cにおけるシリコーン系成分の質量割合を表1に示すように変更した以外は、実施例1と同様にして剥離フィルムを作製した。
基材として、表裏同粗度のPETフィルム(厚さ31μm)を用意した。このPETフィルムの両面における算術平均粗さ(Ra)は15nmであり、最大突起高さ(Rp)は98nmであった。基材として上記の基材を使用する以外、実施例1と同様にして剥離フィルムを作製した。
剥離剤層の厚さを表1に示すように変更した以外は、実施例7と同様にして剥離フィルムを作製した。
基材として、表裏異粗度のPETフィルム(厚さ31μm)を用意した。このPETフィルムの第1の面における算術平均粗さ(Ra)は7nmであり、最大突起高さ(Rp)は43nmであった。また、第2の面における算術平均粗さ(Ra)は34nmであり、最大突起高さ(Rp)は250nmであった。基材として上記の基材を使用する以外、実施例1と同様にして剥離フィルムを作製した。
剥離剤組成物Cにおいてシリコーン系成分を配合しない以外は、実施例1と同様にして剥離フィルムを作製した。
剥離剤層の厚さを表1に示すように変更した以外は、実施例1と同様にして剥離フィルムを作製した。
熱硬化付加反応型シリコーン(信越化学工業社製,KS-847H)100質量部をトルエンで希釈し、これに白金触媒(信越化学工業社製,CAT-PL-50T)2質量部を混合し、固形分が5.0質量%の剥離剤溶液を調製した。
剥離剤層の厚さを表1に示すように変更した以外は、比較例5と同様にして剥離フィルムを作製した。
実施例および比較例で得られた剥離フィルムの剥離剤層の厚さ(μm)を、反射式膜厚計(フィルメトリックス社製,F20)を使用して測定した。具体的には、実施例および比較例で得られた剥離フィルムを100×100mmに裁断した後、測定する側の面の反対面が吸引ステージ側となるように剥離フィルムを膜厚計に設置し、剥離剤層表面の10ヵ所について膜厚を測定し、その平均値を剥離剤層の厚さとした。結果を表1に示す。
実施例および比較例で得られた剥離フィルムを、測定する側の面の反対面がガラス板側となるように上記両面テープを介してガラス板に固定した。その剥離フィルムの剥離剤層の表面における算術平均粗さ(Ra;nm)および最大突起高さ(Rp;nm)を、表面粗さ測定機(ミツトヨ社製,SV-3000S4,触針式)を使用し、JIS B0601-1994に準拠して測定した。結果を表1に示す。
試験例2のようにガラス板に固定した剥離フィルムの剥離剤層の表面における、高さ10nm以上の突起高さを有する粗大突起の面積占有率(%)を算出した。具体的には、光干渉式表面形状観察装置(Vecco社製,WYKO―1100)を使用して、PSIモードにて50倍率で観察し、得られた91.2×119.8μmの範囲における表面形状画像を、突起高さ10μm以上の部分とそれ以外の部分とで二値化処理し、得られた突起高さ10μm以上の部分の面積の、全面積に対する割合の百分率を、高さ10nm以上の突起高さを有する粗大突起の面積占有率(%)とした。結果を表1に示す。
実施例および比較例で得られた剥離フィルムについて、メチルエチルケトンを3ml含ませたウエス(小津産業社製,BEMCOT AP-2)によって剥離剤層の表面を荷重1kg/cm2で往復10回研磨した後、剥離剤層の表面を目視で観察し、以下の判断基準で剥離剤層の硬化性を評価した。結果を表1に示す。
A…剥離剤層の溶解・脱落なし
B…剥離剤層の一部溶解が見られた
C…剥離剤層が完全に溶解し、基材から脱落した
実施例および比較例で得られた剥離フィルムを200×200mmに裁断した後、基材がガラス板側となるように、剥離フィルムを平坦なガラス板の上に載置した。次いで、100×100mmのガラス板を剥離フィルムの剥離剤層上の中央に載置した後、下側のガラス板の上面から剥離フィルムの各角部頂点までの高さを測定し、以下の判断基準でカールを評価した。結果を表1に示す。
A…各角部の高さの総和が50mm未満
B…各角部の高さの総和が50mm以上、100mm未満
C…各角部の高さの総和が100mm以上
実施例および比較例で得られた剥離フィルムを、幅400mm、長さ5000mのロール状に巻き上げた。この剥離フィルムロールを40℃、湿度50%以下の環境下に30日間保管し、剥離フィルムロールそのままの状態での外観を目視にて観察し、以下の判断基準でブロッキング性を評価した。結果を表1に示す。
A…ロール状に巻き上げたときから変化がなかった(ブロッキング無し)
B…幅方向における半分以下の領域にて、フィルム同士の密着に起因する色目の変化が見られた(ブロッキング若干有り)
C…幅方向における過半の領域にわたって、フィルム同士の密着に起因する色目の変化が見られた(ブロッキング有り)
チタン酸バリウム粉末(BaTiO3;堺化学工業社製,BT-03)100質量部、バインダーとしてのポリビニルブチラール(積水化学工業社製,エスレックB・K BM-2)8質量部、および可塑剤としてのフタル酸ジオクチル(関東化学社製,フタル酸ジオクチル 鹿1級)4質量部に、トルエンおよびエタノールの混合液(質量比6:4)135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。
A…セラミックグリーンシートにピンホールがなかった
B…セラミックグリーンシートに1~5個のピンホールが発生した
C…セラミックグリーンシートに6個以上のピンホールが発生した
試験例7と同じ手順により剥離フィルムの剥離剤層表面に成形したセラミックグリーンシートを、剥離フィルムを打ち抜かないようにして200mm×200mmに打ち抜いた。次いで、グリーンシート積層機のシート剥離機構を利用して、打ち抜かれたグリーンシートを真空吸引ステージに吸着させ、剥離フィルムから剥離した。このときのセラミックグリーンシートの剥離性を、以下の判断基準で評価した。結果を表1に示す。
A…セラミックグリーンシートが破れることなく、スムーズに剥離でき、剥離剤層上にセラミックグリーンシートが残らなかった
B…セラミックグリーンシートが破れることなく、ややスムーズさに欠けるものの剥離でき、剥離剤層上にセラミックグリーンシートが残らなかった
C…セラミックグリーンシートが破れるか、剥離できなかった
ポリビニルブチラール樹脂をトルエンおよびエタノールの混合液(質量比6:4)にて溶解した塗工液を、実施例および比較例で得られた剥離フィルムの剥離剤層の上に、乾燥後の厚さが1μmとなるように塗布し、80℃で1分間乾燥させてポリビニルブチラール樹脂層を成形した。そして、そのポリビニルブチラール樹脂層の表面にポリエステルテープを貼付した。
A…凹みの数が0個
B…凹みの数が1~5個
C…凹みの数が6個以上
11…基材
12…剥離剤層
Claims (7)
- 基材と、前記基材の片側に設けられた剥離剤層とを備えたセラミックグリーンシート製造工程用剥離フィルムであって、
前記剥離剤層は、活性エネルギー線硬化性成分およびシリコーン系成分を含む剥離剤組成物の硬化物であり、
前記剥離剤層の前記基材とは反対側の面における算術平均粗さ(Ra)が8nm以下であり、かつ最大突起高さ(Rp)が50nm以下である
ことを特徴とするセラミックグリーンシート製造工程用剥離フィルム。 - 前記剥離剤層の前記基材とは反対側の面における高さ10nm以上の突起高さを有する粗大突起の面積占有率は、10%以下であることを特徴とする請求項1に記載のセラミックグリーンシート製造工程用剥離フィルム。
- 前記シリコーン系成分は、反応性官能基を有する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1または2に記載のセラミックグリーンシート製造工程用剥離フィルム。
- 前記剥離剤組成物中における前記シリコーン系成分の、前記活性エネルギー線硬化性成分および前記シリコーン系成分の合計質量に対する質量割合は、0.7~5質量%であることを特徴とする請求項1~3に記載のセラミックグリーンシート製造工程用剥離フィルム。
- 前記活性エネルギー線硬化性成分は、(メタ)アクリル酸エステルであることを特徴とする請求項1~4のいずれかに記載のセラミックグリーンシート製造工程用剥離フィルム。
- 前記(メタ)アクリル酸エステルは、三官能以上の(メタ)アクリル酸エステルであることを特徴とする請求項5に記載のセラミックグリーンシート製造工程用剥離フィルム。
- 前記剥離剤層の厚さは、0.3~2μmであることを特徴とする請求項1~6のいずれかに記載のセラミックグリーンシート製造工程用剥離フィルム。
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Cited By (24)
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WO2015151993A1 (ja) * | 2014-03-31 | 2015-10-08 | リンテック株式会社 | セラミックグリーンシート製造工程用剥離フィルム |
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JPWO2013145864A1 (ja) | 2015-12-10 |
PH12014502176B1 (en) | 2014-12-10 |
CN104220221A (zh) | 2014-12-17 |
PH12014502176A1 (en) | 2014-12-10 |
TW201406513A (zh) | 2014-02-16 |
US20150037536A1 (en) | 2015-02-05 |
TWI592269B (zh) | 2017-07-21 |
JP5492352B2 (ja) | 2014-05-14 |
KR20140139581A (ko) | 2014-12-05 |
SG11201406065QA (en) | 2014-11-27 |
KR101997310B1 (ko) | 2019-07-05 |
CN104220221B (zh) | 2016-10-12 |
MY168431A (en) | 2018-11-09 |
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