WO2016136759A1 - 剥離剤組成物、剥離シート、片面粘着シートおよび両面粘着シート - Google Patents
剥離剤組成物、剥離シート、片面粘着シートおよび両面粘着シート Download PDFInfo
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- WO2016136759A1 WO2016136759A1 PCT/JP2016/055300 JP2016055300W WO2016136759A1 WO 2016136759 A1 WO2016136759 A1 WO 2016136759A1 JP 2016055300 W JP2016055300 W JP 2016055300W WO 2016136759 A1 WO2016136759 A1 WO 2016136759A1
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- release
- release agent
- sheet
- sensitive adhesive
- pressure
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- B32B15/085—Layered products comprising a layer of metal comprising metal 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 comprising polyolefins
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Definitions
- the present invention relates to a release agent composition, a release sheet, a single-sided adhesive sheet and a double-sided adhesive sheet.
- ⁇ Adhesive sheets are affixed to such electrical parts for the purpose of temporarily fixing during assembly and displaying the contents of the parts.
- Such a pressure-sensitive adhesive sheet usually includes a pressure-sensitive adhesive sheet body composed of a pressure-sensitive adhesive sheet substrate and a pressure-sensitive adhesive layer, and is composed of a base material and a release agent layer before being attached to an electrical component.
- the release sheet is further provided. That is, the pressure-sensitive adhesive sheet is configured such that the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet body is stuck to the release agent layer of the release sheet before being attached to the electrical component.
- a release agent layer is provided on the surface of the release sheet (contact surface with the pressure-sensitive adhesive layer) for the purpose of improving the peelability.
- a silicone resin has been used as a constituent material of the release agent layer (see, for example, Patent Document 1).
- silicone compounds such as low molecular weight silicone resin, siloxane, and silicone oil in the release sheet migrate to the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet body.
- the pressure-sensitive adhesive layer or the surface of the pressure-sensitive adhesive sheet body (the surface opposite to the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet body)
- the transferred silicone compound is gradually vaporized.
- the vaporized silicone compound is deposited on the surface of the electrical contact portion by, for example, an arc generated in the vicinity of the electrical contact portion of the electrical component to form a fine silicone compound layer or a silicon oxide compound layer derived from the silicone compound. It is known to do.
- a silicon compound or a silicon oxide-based compound derived from a silicone compound is deposited on the surface of the electrical contact portion, poor conductivity may be caused.
- the silicone compound that has migrated to the surface of the pressure-sensitive adhesive layer or the pressure-sensitive adhesive sheet body gradually vaporizes, and the silicon compound or the silicon oxide compound derived from the silicone compound is Deposits on the magnetic head or disk surface.
- the deposition of this minute silicone compound or silicon oxide compound may adversely affect the reading and writing of the hard disk.
- the purpose of the present invention is to prevent the release agent composition from moving to the surface of the release sheet base material when the release sheet formed from the release agent composition is wound into a roll, and to the release sheet.
- the object is to provide a release agent composition, a release sheet, a single-sided pressure-sensitive adhesive sheet, and a double-sided pressure-sensitive adhesive sheet that can impart light release properties.
- the acrylic polymer (B) has the following structural formula (1) as a structural unit,
- R 1 is H or CH 3
- R 2 is an alkyl group having a branched structure and having 10 to 30 carbon atoms.
- the release agent composition according to (1) further including a crosslinking agent (C).
- a release sheet comprising:
- release sheet according to any one of (8) to (12), wherein the release agent layer has an average thickness of 0.01 ⁇ m or more and 1.0 ⁇ m or less.
- a core material (16) a core material; Two pressure-sensitive adhesive layers laminated on both sides of the core; Two release sheets laminated on the adhesive surfaces of the two adhesive layers, At least one of the two release sheets is the release sheet according to any one of (8) to (13).
- the release agent when the release sheet formed from the release agent composition is wound into a roll, the release agent can suppress the transfer of the release agent composition to the surface of the substrate of the release sheet.
- Compositions and release sheets can be provided.
- a release agent composition and a release sheet that can suppress crystallization of the side chain of the acrylic polymer (B) and can impart light release properties to the release sheet.
- a single-sided pressure-sensitive adhesive sheet with good surface printability and printability can be provided.
- a release agent composition for example, electrical components such as relays, various switches, connectors, motors, and hard disks
- adherends for example, electrical components such as relays, various switches, connectors, motors, and hard disks
- a single-sided adhesive sheet and a double-sided adhesive sheet can be provided.
- FIG. 1 is a longitudinal sectional view showing a preferred embodiment of the release sheet of the present invention.
- FIG. 2 is a longitudinal sectional view showing a preferred embodiment of the single-sided pressure-sensitive adhesive sheet of the present invention.
- FIG. 3 is a longitudinal sectional view showing a first embodiment of the double-sided pressure-sensitive adhesive sheet of the present invention.
- FIG. 4 is a longitudinal sectional view showing a second embodiment of the double-sided pressure-sensitive adhesive sheet of the present invention.
- FIG. 1 is a longitudinal sectional view showing a preferred embodiment of the release sheet of the present invention.
- the upper side in the figure is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”.
- the release agent composition and the release sheet will be described in detail.
- the release sheet 1 has a configuration in which a release agent layer 11 is formed on a substrate 12 as shown in FIG.
- the substrate 12 has a function of supporting the release agent layer 11.
- the substrate 12 is, for example, a polyester film such as a polyethylene terephthalate film or a polybutylene terephthalate film, a polyolefin film such as a polypropylene film or a polymethylpentene film, a plastic film such as a polycarbonate film, a metal foil such as aluminum or stainless steel, glassine paper,
- the paper is composed of high-quality paper, coated paper, impregnated paper, synthetic paper, and the like, and paper obtained by laminating a thermoplastic resin such as polyethylene on these paper base materials.
- the average thickness of the substrate 12 is not particularly limited, but is preferably 5 ⁇ m or more, and more preferably 10 ⁇ m or more. Further, the average thickness of the substrate 12 is not particularly limited, but is preferably 300 ⁇ m or less, and more preferably 200 ⁇ m or less.
- the release agent layer 11 is formed by curing the release agent composition of the present invention.
- the release agent composition of the present invention includes a polyester resin (A) and an acrylic polymer (B), and the acrylic polymer (B) has the following structural formula (1) as a structural unit, and the polyester resin
- R 1 is H or CH 3
- R 2 is an alkyl group having a branched structure and having 10 to 30 carbon atoms.
- the release agent composition has such characteristics, the release agent composition (release agent) moves to the surface of the substrate 12 of the release sheet 1 (the surface of the substrate 12 opposite to the release agent layer 11). Can be suppressed. Thereby, when winding up the single-sided adhesive sheet described later, the surface of the adhesive sheet main body described later via the surface of the substrate 12 of the release sheet 1 (surface opposite to the adhesive layer of the adhesive sheet main body). It can suppress that a peeling agent composition transfers. As a result, the printability and printability of the surface of the pressure-sensitive adhesive sheet main body are improved.
- the peeling force when peeling the adhesive sheet main body from the release sheet 1 can be reduced.
- the release agent composition contains the polyester resin (A) and the acrylic polymer (B) in a predetermined ratio
- the acrylic polymer (B) is removed from the surface of the release agent layer 11 (based on the release agent layer 11).
- the surface on the side opposite to the material 12) can be appropriately distributed.
- the carbon chain density on the surface of the release agent layer 11 increases, and light release properties can be imparted to the release sheet 1.
- the release agent composition of the present invention contains an acrylic polymer (B) having an alkyl group having a branched structure as a side chain.
- the release agent composition containing such an acrylic polymer (B) can be used as the base material 12 or the pressure-sensitive adhesive. Transition to the layer can be suppressed.
- the polyester resin (A) is not particularly limited, and can be appropriately selected from known polyester resins.
- a specific polyester resin includes a resin obtained by a condensation reaction between a polyhydric alcohol and a polybasic acid.
- a non-convertible polyester resin modified with a condensate of a dibasic acid and a dihydric alcohol or a non-drying oil fatty acid and a convertible polyester resin that is a condensate of a dibasic acid with a trihydric or higher alcohol. Any of these can be used in the present invention.
- polyhydric alcohol used as a raw material for the polyester resin examples include dihydric alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, trimethylene glycol, tetramethylene glycol, and neopentyl glycol, glycerin, trimethylolethane, and triethylene glycol.
- dihydric alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, trimethylene glycol, tetramethylene glycol, and neopentyl glycol
- glycerin examples include trihydric alcohols such as methylolpropane
- polyhydric alcohols such as diglycerin, triglycerin, pentaerythritol, dipentaerythritol, mannitol, and sorbitol. These may be used individually by 1 type and may be used in combination of 2 or more type.
- polybasic acid examples include aromatic polybasic acids such as phthalic anhydride, terephthalic acid, isophthalic acid, and trimetic anhydride, aliphatic saturated polybasic acids such as succinic acid, adipic acid, and sebacic acid, maleic acid, Deales such as aliphatic unsaturated polybasic acids such as maleic anhydride, fumaric acid, itaconic acid, citraconic anhydride, cyclopentadiene-maleic anhydride adduct, terpene-maleic anhydride adduct, rosin-maleic anhydride adduct -The polybasic acid by Alder reaction etc. are mentioned. These may be used individually by 1 type and may be used in combination of 2 or more type.
- non-drying oil fatty acid that is a modifying agent
- examples of the non-drying oil fatty acid that is a modifying agent include octylic acid, lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, eleostearic acid, ricinoleic acid, dehydrated ricinoleic acid, and palm.
- the polyester resin (A) preferably has a reactive functional group for reacting with the crosslinking agent, and the reactive functional group is more preferably a hydroxyl group.
- the hydroxyl value of the polyester resin (A) is preferably 5 mgKOH / g or more, and more preferably 10 mgKOH / g or more.
- the hydroxyl value of a polyester resin (A) is 500 mgKOH / g or less, and it is more preferable that it is 300 mgKOH / g or less.
- the number average molecular weight of the polyester resin (A) is preferably 500 or more, and more preferably 1000 or more.
- the number average molecular weight of the polyester resin (A) is preferably 10,000 or less, and more preferably 5000 or less.
- the content of the polyester resin (A) in the release agent composition is preferably 20% by mass or more, and more preferably 40% by mass or more.
- the content of the polyester resin (A) in the release agent composition is preferably 99% by mass or less, and more preferably 95% by mass or less.
- the acrylic polymer (B) has the structural formula (1) as a structural unit.
- the release agent composition moves to the back surface of the release sheet 1 (the surface opposite to the release agent layer 11 of the substrate 12). Can be suppressed.
- the transfer of the release agent composition to the surface of the pressure-sensitive adhesive sheet body via the back surface of the release sheet 1 can be suppressed, and the printability and printability of the surface of the pressure-sensitive adhesive sheet body are improved.
- the light release property can be imparted to the release sheet 1.
- R 2 is an alkyl group having 10 or more carbon atoms having a branched structure, preferably an alkyl group having 16 or more carbon atoms having a branched structure, and the number of carbons having a branched structure. It is more preferably 22 or more alkyl groups. Thereby, it can suppress more that a peeling agent composition transfers to the surface of the base material 12 of a peeling sheet 1, or an adhesive layer.
- the carbon number of the alkyl group constituting R 2 is less than the lower limit, the glass transition temperature of the acrylic polymer (B) is remarkably lowered, and the release agent layer 11 There is a case where the peelability of the film is lowered.
- R 2 is an alkyl group having 30 or less carbon atoms having a branched structure, preferably an alkyl group having 28 or less carbon atoms having a branched structure, and having a branched structure. More preferably, it is an alkyl group having 26 or less carbon atoms. Thereby, crystallization of the alkyl group can be more effectively prevented.
- the number of carbon atoms of the alkyl group constituting R 2 exceeds the upper limit, the crystallinity of the acrylic polymer (B) increases, and a problem may occur that the release sheet 1 causes heavy release. is there.
- the solubility of the release agent composition in an organic solvent is reduced, so that when the release agent composition (solution) is applied to the substrate 12, the processability of the coating film containing the release agent composition is reduced. May occur.
- the carbon number of the alkyl group constituting the R 2 of the respective structural units of an acrylic polymer the structural formula contained in (B) (1) is the same as one another.
- the acrylic polymer (B) preferably further has at least one functional group selected from the group consisting of a hydroxyl group, an amino group, and a carboxyl group. Thereby, it can react with a crosslinking agent. As a result, the durability of the formed release agent layer 11 can be further improved.
- the mass average molecular weight of the acrylic polymer (B) is preferably 50000 or more, and more preferably 70000 or more.
- the mass average molecular weight of the acrylic polymer (B) is preferably 500000 or less, and more preferably 200000 or less. Thereby, the acrylic polymer (B) can be easily unevenly distributed on the surface of the release agent layer 11, and the release performance of the release agent layer 11 can be further improved.
- the structural unit represented by the structural formula (1) is preferably contained in the acrylic polymer (B) in an amount of 80% by mass or more, and more preferably 84% by mass or more.
- the structural unit represented by the structural formula (1) is preferably contained in the acrylic polymer (B) in an amount of 99.9% by mass or less, and more preferably 99.5% by mass or less.
- the content of the acrylic polymer (B) in the release agent composition is preferably 3% by mass or more, and more preferably 10% by mass or more.
- the content of the acrylic polymer (B) in the release agent composition is preferably 70% by mass or less, and more preferably 50% by mass or less.
- the release agent composition may contain a crosslinking agent (C) in addition to the above components.
- the polyester resin (A) and the acrylic polymer (B) can be crosslinked (cured), and the release agent layer 11 having excellent durability can be formed.
- the crosslinking agent (C) is preferably at least one selected from the group consisting of a polyfunctional amino compound, a polyfunctional isocyanate compound, a polyfunctional epoxy compound, and a polyfunctional metal compound. Thereby, it is possible to cure the release agent composition more effectively and in a short time without requiring extreme high-temperature heating.
- polyfunctional amino compounds include melamine resins such as methylated melamine resins and butylated melamine resins; urea resins such as methylated urea resins and butylated urea resins; benzoguanamine resins such as methylated benzoguanamine resins and butylated benzoguanamine resins; ethylenediamine And diamines such as tetramethylenediamine, hexamethylenediamine, N, N′-diphenylethylenediamine, and p-xylylenediamine.
- melamine resins such as methylated melamine resins and butylated melamine resins
- urea resins such as methylated urea resins and butylated urea resins
- benzoguanamine resins such as methylated benzoguanamine resins and butylated benzoguanamine resins
- ethylenediamine And diamines such as tetramethylenediamine,
- polyfunctional isocyanate compound examples include diphenylmethane diisocyanate (MDI), tolylene diisocyanate (TDI), hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), trimethylhexamethylene diisocyanate (TMDI), and xylene diisocyanate (XDI).
- MDI diphenylmethane diisocyanate
- TDI tolylene diisocyanate
- HDI hexamethylene diisocyanate
- IPDI isophorone diisocyanate
- TMDI trimethylhexamethylene diisocyanate
- XDI xylene diisocyanate
- Naphthalene diisocyanate (NDI) trimethylolpropane adduct TDI, trimethylolpropane adduct HDI, trimethylolpropane adduct IPDI, trimethylolpropane adduct
- polyfunctional epoxy compound examples include N, N, N ′, N′-tetraglycidylmetaxylenediamine, 1,3-bis (N, N-diglycidylaminomethyl) cyclohexane, and the like.
- polyfunctional metal compound examples include aluminum chelate compounds such as aluminum trisacetylacetonate, aluminum ethylacetoacetate and diisopropylate; titanium tetraacetylacetonate, titanium acetylacetonate, titanium octylene glycolate, tetraiso
- aluminum chelate compounds such as aluminum trisacetylacetonate, aluminum ethylacetoacetate and diisopropylate
- titanium chelate compounds such as propoxy titanium and tetramethoxy titanium; trimethoxy aluminum and the like.
- a polyfunctional amino compound is preferable, a melamine resin, particularly an alkylated melamine resin having an alkyl group with 3 or less carbon atoms is more preferable, and a methylated melamine resin is particularly preferable.
- the content of the crosslinking agent (C) is preferably 1 part by mass or more and 30 parts by mass or less when the total content of the polyester resin (A) and the acrylic polymer (B) is 100 parts by mass. . Thereby, a release agent composition can be hardened more efficiently.
- a known acidic catalyst such as hydrochloric acid or p-toluenesulfonic acid or a tin-based catalyst such as dibutyltin laurate may be added as desired.
- the amount of the silicone compound measured by X-ray photoelectron spectroscopy (XPS) of the release agent composition is preferably 0.5 atomic% or less.
- XPS X-ray photoelectron spectroscopy
- the amount of the silicone compound measured by X-ray photoelectron spectroscopy (XPS) of the release agent composition is more preferably 0.1 atomic% or less.
- X-ray photoelectron spectroscopy (XPS) measurement conditions and measurement values can be calculated by the following method.
- Measuring device Quantera SXM manufactured by ULVAC-PHI X-ray: AlK ⁇ (1486.6 eV) Extraction angle: 45 ° Measuring elements: silicon (Si), oxygen (O) and carbon (C)
- the amount of silicone compound is calculated by multiplying the value of Si / (Si + C) by 100, and is expressed in “atomic%”.
- the average thickness of the release agent layer 11 is not particularly limited, but is preferably 0.01 ⁇ m or more, more preferably 0.03 ⁇ m or more, and further preferably 0.05 ⁇ m or more.
- the average thickness of the release agent layer 11 is preferably 1.0 ⁇ m or less, more preferably 0.8 ⁇ m or less, and further preferably 0.5 ⁇ m or less. When the average thickness of the release agent layer 11 is less than the lower limit value, a sufficient release performance may not be obtained when the pressure-sensitive adhesive sheet body described later is peeled off from the release sheet 1.
- the release agent layer 11 when the average thickness of the release agent layer 11 exceeds the upper limit, when the release sheet 1 is wound up in a roll shape, the release agent layer 11 is likely to block the surface of the substrate 12 of the release sheet 1. The peeling performance of the release agent layer 11 may be reduced due to blocking.
- a hardening method of the above-mentioned release agent composition does not specifically limit as a hardening method of the above-mentioned release agent composition.
- methods such as irradiation of active energy rays, such as an ultraviolet-ray and an electron beam, a heating, can be used.
- a primer layer may be provided between the release agent layer 11 and the substrate 12 for the purpose of improving the adhesion between the release agent layer 11 and the substrate 12.
- the surface free energy measured by the contact angle method is preferably at 40 mJ / m 2 or less, 37 mJ / m 2 or less It is more preferable that it is 34 mJ / m 2 or less. Thereby, the wettability of the adhesive contained in the below-mentioned adhesive layer stuck on the release agent layer 11 is suppressed. As a result, heavy peeling can be prevented.
- a contact angle meter (DM-701, manufactured by Kyowa Interface Science Co., Ltd.) was used for contact angle measurement by the contact angle method. And the contact angle with respect to 3 liquids of water, diiodomethane, and dibromonaphthalene on the surface of the release agent layer 11 of the release sheet 1 was measured (23 ° C., 50% RH), and the surface free energy was calculated by the Kitazaki-Hata method.
- the ratio of the C element on the surface of the release agent layer 11 in the surface element analysis by XPS is preferably 85 atomic% or more, more preferably 89 atomic% or more, and 92 atomic% or more. Further preferred. Further, the ratio of the C element on the surface of the release agent layer 11 in the surface element analysis by XPS is more preferably 99 atomic% or less, and further preferably 98 atomic% or less. Thereby, it can suppress more effectively that a peeling agent composition transfers to the base material 12.
- the ratio of Si element on the surface of the release agent layer 11 in the surface element analysis by XPS is preferably smaller than 0.5 atomic%. Thereby, it can suppress more effectively that a peeling agent composition transfers to the base material 12.
- PHI Quantera SXM manufactured by ULVAC-PHI was used for the measurement by XPS on the surface of the release agent layer 11. Further, measurement is performed at a photoelectron extraction angle of 45 ° using monochromatic AlK ⁇ as an X-ray source, and the element ratio of carbon, oxygen and silicon present on the surface of the release agent layer 11 is calculated.
- the polyester film and the release agent layer 11 were brought into contact with each other and allowed to stand for 24 hours at room temperature and under a pressure of 10 kg / cm 2 . Thereafter, the release agent layer 11 was removed from the polyester film, and the surface of the polyester film in contact with the release agent layer 11 was subjected to surface elemental analysis by XPS.
- the occupation ratio of the release agent component on the surface of the polyester film contacted with the release agent layer 11 calculated using the element ratio thus obtained is preferably 40% or less, more preferably 30% or less. .
- the release agent component occupancy ratio is a measure of the amount of release agent transferred to the polyester film (release agent transfer amount).
- the amount of carbon on the surface of the polyester film obtained by XPS surface element contact with the release agent layer 11 is C total [atomic%]
- the amount of carbon on the surface of the polyester film before contact with the release agent layer 11 Is the Cb [atomic%]
- the carbon content of the surface of the release agent layer 11 is C a [atomic%]
- the ratio of the release agent component on the surface of the polyester film in contact with the release agent layer 11 Is A [%]
- C total ⁇ A ⁇ C a + (100 ⁇ A) ⁇ C b ⁇ / 100.
- FIG. 2 is a longitudinal sectional view showing a preferred embodiment of the single-sided pressure-sensitive adhesive sheet of the present invention.
- the single-sided pressure-sensitive adhesive sheet 100 includes a single-sided pressure-sensitive adhesive sheet main body 2 composed of a pressure-sensitive adhesive sheet base material 22 and a pressure-sensitive adhesive layer 21 laminated on one side of the pressure-sensitive adhesive sheet base material 22, and a pressure-sensitive adhesive layer. It is comprised with the said peeling sheet 1 laminated
- the pressure-sensitive adhesive sheet substrate 22 has a function of supporting the pressure-sensitive adhesive layer 21, for example, a polyethylene terephthalate film, a polybutylene terephthalate film, a polyethylene film, a polypropylene film, a polymethylpentene film, a plastic film such as a polycarbonate film, It is composed of a simple substance or a composite such as metal foil such as aluminum and stainless steel, synthetic paper, dust-free paper, high-quality paper, art paper, coated paper, glassine paper and the like.
- the pressure-sensitive adhesive sheet substrate 22 is composed of a polyester film such as a polyethylene terephthalate film or a polybutylene terephthalate film, a plastic film such as a polypropylene film, or a so-called dust-free paper (for example, Japanese Patent Publication No. 6-11959) with less dust generation. It is preferable.
- the pressure-sensitive adhesive sheet base material 22 is made of a plastic film or dust-free paper, dust or the like is hardly generated during processing or use of the single-sided pressure-sensitive adhesive sheet 100, and adverse effects are hardly exerted on electronic devices such as relays.
- the pressure-sensitive adhesive sheet substrate 22 is made of a plastic film or dust-free paper, cutting or punching during processing becomes easy.
- this plastic film is a polyethylene terephthalate film.
- the polyethylene terephthalate film has the advantages that it generates less dust and generates less gas during heating.
- the pressure-sensitive adhesive sheet substrate 22 has printability and printability on the surface.
- the surface of the pressure-sensitive adhesive sheet base material 22 is subjected to surface treatment for the purpose of improving the adhesion of printing and printing.
- the average thickness of the pressure-sensitive adhesive sheet substrate 22 is not particularly limited, but is preferably 5 ⁇ m or more, and more preferably 10 ⁇ m or more. Moreover, it is preferable that the average thickness of the adhesive sheet base material 22 is 300 micrometers or less, and it is more preferable that it is 200 micrometers or less.
- the pressure-sensitive adhesive layer 21 is composed of a pressure-sensitive adhesive composition mainly containing a pressure-sensitive adhesive.
- the pressure sensitive adhesive include acrylic pressure sensitive adhesive, polyester pressure sensitive adhesive, and urethane pressure sensitive adhesive.
- the pressure-sensitive adhesive is an acrylic pressure-sensitive adhesive
- it is mainly formed of a main monomer component that provides tackiness, a comonomer component that provides adhesiveness and cohesion, and a functional group-containing monomer component that improves crosslinking and adhesion.
- An acrylic pressure-sensitive adhesive can be constituted from the polymer or copolymer.
- (Meth) acrylic acid means both “acrylic acid” and “methacrylic acid”, and the same applies to other similar terms.
- Examples of the main monomer component include ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, pentyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate,
- Examples include (meth) acrylic acid alkyl esters such as octyl (meth) acrylate and cyclohexyl (meth) acrylate.
- comonomer components include methyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, tridecyl (meth) acrylate, benzyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, vinyl acetate, and styrene. And acrylonitrile.
- Examples of the functional group-containing monomer component include carboxyl group-containing monomers such as (meth) acrylic acid, maleic acid, itaconic acid, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxy Examples thereof include hydroxyl group-containing monomers such as butyl (meth) acrylate and N-methylol (meth) acrylamide, (meth) acrylamide, and glycidyl (meth) acrylate.
- carboxyl group-containing monomers such as (meth) acrylic acid, maleic acid, itaconic acid, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxy
- hydroxyl group-containing monomers such as butyl (meth) acrylate and N-methylol (meth) acrylamide, (meth) acrylamide, and glycidyl (meth) acrylate.
- the polymer or copolymer constituting the acrylic pressure-sensitive adhesive contains these components, the pressure-sensitive adhesive strength and cohesive strength of the pressure-sensitive adhesive composition are improved. Moreover, since such an acrylic adhesive normally does not have an unsaturated bond in a molecule
- a pressure-sensitive adhesive composition either a cross-linked pressure-sensitive adhesive composition that undergoes a crosslinking treatment or a non-cross-linked pressure-sensitive adhesive composition that does not undergo a cross-linking treatment may be used. It is more preferable to use a product.
- the cross-linked pressure-sensitive adhesive composition is used, the pressure-sensitive adhesive layer 21 having a better cohesive force can be formed.
- crosslinking agent used in the crosslinking adhesive composition examples include epoxy compounds, isocyanate compounds, metal chelate compounds, metal alkoxides, metal salts, amine compounds, hydrazine compounds, and aldehyde compounds.
- the pressure-sensitive adhesive composition used in the present invention may contain various additives such as a plasticizer, a tackifier, and a stabilizer as necessary.
- the average thickness of the pressure-sensitive adhesive layer 21 is not particularly limited, but is preferably 5 ⁇ m or more, and more preferably 10 ⁇ m or more. Moreover, it is preferable that the average thickness of the adhesive layer 21 is 200 micrometers or less, and it is more preferable that it is 100 micrometers or less.
- FIG. 3 is a longitudinal sectional view showing a first embodiment of the double-sided pressure-sensitive adhesive sheet of the present invention.
- the upper side in the figure is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”.
- the double-sided pressure-sensitive adhesive sheet 110 of the present embodiment has a double-sided pressure-sensitive adhesive sheet body 2 ', a release sheet 1, and a release sheet 1' as shown in FIG.
- the double-sided pressure-sensitive adhesive sheet body 2 ′ has a core material 22 ′, and a pressure-sensitive adhesive layer 21 ⁇ / b> A and a pressure-sensitive adhesive layer 21 ⁇ / b> B laminated on both surfaces of the core material 22 ′.
- the core material 22 ′ has a function of supporting the pressure-sensitive adhesive layers 21 ⁇ / b> A and 21 ⁇ / b> B, and can be made of the same material as that of the pressure-sensitive adhesive sheet base material 22 described above.
- the average thickness of the core material 22 ′ is not particularly limited, but is preferably 2 ⁇ m or more, and more preferably 10 ⁇ m or more.
- the average thickness of the core material 22 ′ is preferably 300 ⁇ m or less, and more preferably 200 ⁇ m or less.
- the pressure-sensitive adhesive layers 21A and 21B are composed of a pressure-sensitive adhesive composition containing a pressure-sensitive adhesive as a main ingredient.
- a pressure-sensitive adhesive composition containing a pressure-sensitive adhesive as a main ingredient.
- the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layers 21 ⁇ / b> A and 21 ⁇ / b> B the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 21 of the single-sided pressure-sensitive adhesive sheet 100 can be used.
- the average thickness of the pressure-sensitive adhesive layers 21A and 21B is not particularly limited, but is preferably 1 ⁇ m or more, and more preferably 10 ⁇ m or more. Further, the average thickness of the pressure-sensitive adhesive layers 21A and 21B is preferably 200 ⁇ m or less, and more preferably 100 ⁇ m or less.
- the release sheet 1 and the release sheet 1 ' are laminated on the pressure-sensitive adhesive layer 21A and the pressure-sensitive adhesive layer 21B, respectively, as shown in FIG. That is, the double-sided pressure-sensitive adhesive sheet 110 has two release sheets 1 and 1 'laminated on the pressure-sensitive adhesive surfaces of the two pressure-sensitive adhesive layers 21A and 21B.
- the release sheets 1 and 1 ′ have release agent layers 11 and 11 ′ and base materials 12 and 12 ′, respectively.
- the release agent layer 11 is formed of a cured product of the release agent composition of the present invention.
- the release agent layer 11 ′ of the release sheet 1 ′ may be formed of a cured product of the release agent composition of the present invention, or a cured product of a release agent composition different from the release agent composition of the present invention. It may be formed.
- the peeling force from 21 A of adhesive layers of release sheet 1 is the adhesive of release sheet 1'. It is preferable that it is larger than the peeling force from the layer 21B. Thereby, it is possible to prevent the release sheet 1 from being unintentionally peeled off from the pressure-sensitive adhesive layer 21 ⁇ / b> A when the release sheet 1 ′ is peeled off.
- the peeling force with respect to 21 A of adhesive layers of release sheet 1, and release sheet 1' is preferably 50 mN / 20 mm or more, more preferably 80 mN / 20 mm or more, and further preferably 100 mN / 20 mm or more. Further, the difference in the peeling force is more preferably 700 mN / 20 mm or less, and particularly preferably 450 mN / 20 mm or less.
- the peeling force with respect to each adhesive layer 21A and 21B of peeling sheet 1 and peeling sheet 1 ' is 1000 mN / 20 mm or less, It is more preferable that it is 800 mN / 20 mm or less, It is 600 mN / 20 mm or less. Is more preferable.
- the peeling force is more preferably 10 mN / 20 mm or more, and particularly preferably 30 mN / 20 mm or more. As a result, the release sheets 1 and 1 ′ can be more easily peeled from the pressure-sensitive adhesive sheet body 2 ′.
- the measurement of peeling force can be performed using a tensile tester.
- the double-sided pressure-sensitive adhesive sheet 110 is seasoned for one week in an environment of 23 ° C. and 50% RH. Thereafter, the double-sided pressure-sensitive adhesive sheet 110 is cut into a width of 20 mm and a length of 200 mm to obtain a test piece.
- One surface of the test piece is fixed to a test stand of a tensile testing machine with a double-sided tape or the like, and the release sheet 1 or 1 'on the side not fixed with the double-sided tape is pulled in a 180 ° direction at a speed of 0.3 m / min. Can be done.
- FIG. 4 is a longitudinal sectional view showing a second embodiment of the double-sided pressure-sensitive adhesive sheet of the present invention.
- the upper side in the figure is referred to as “upper” or “upper”, and the lower side is referred to as “lower” or “lower”.
- the double-sided pressure-sensitive adhesive sheet 120 according to the present embodiment is different from the above-described embodiment in that the double-sided pressure-sensitive adhesive sheet body 2 ′′ is composed of a single pressure-sensitive adhesive layer.
- a base material 12 is prepared, and the above-described release agent composition is coated on the base material 12 to obtain a coating film. Thereafter, the release sheet 1 can be produced by curing the coating film to form the release agent layer 11.
- the curing method of the release agent composition is not particularly limited, and for example, methods such as irradiation with active energy rays such as ultraviolet rays and electron beams, heating, and the like can be used. Thereby, the release agent layer 11 can be formed more easily.
- Examples of methods for applying the release agent composition onto the substrate 12 include existing methods such as gravure coating, bar coating, spray coating, spin coating, knife coating, roll coating, and die coating. Can be used.
- the pressure-sensitive adhesive composition is applied on the release agent layer 11 of the release sheet 1 to obtain a coating film. Thereafter, the coating film is heated and dried to form the pressure-sensitive adhesive layer 21.
- Examples of methods for applying the pressure-sensitive adhesive composition to the release agent layer 11 include existing methods such as gravure coating, bar coating, spray coating, spin coating, knife coating, roll coating, and die coating. Can be used.
- Examples of the form of the pressure-sensitive adhesive composition at the time of coating include a solvent type, an emulsion type, and a hot melt type.
- the single-sided adhesive sheet 100 can be obtained by bonding the adhesive sheet substrate 22 to the formed adhesive layer 21.
- the release sheet 1 and the release sheet 1 ′ are prepared in the same manner as the method for manufacturing the release sheet 1 constituting the single-sided adhesive sheet 100.
- the pressure-sensitive adhesive composition is applied to the release agent layer 11 of the release sheet 1 to obtain a coating film. Thereafter, the coating film is heated and dried to form the pressure-sensitive adhesive layer 21A.
- the adhesive composition is applied to the release agent layer 11 'of the release sheet 1' to form the adhesive layer 21B.
- the double-sided pressure-sensitive adhesive sheet 110 can be obtained by bonding the core material 22 ′ and the pressure-sensitive adhesive layer 21B formed on the release sheet 1 ′.
- the release sheet 1 and the release sheet 1 ′ are prepared in the same manner as the method for manufacturing the release sheet 1 constituting the single-sided adhesive sheet 100.
- the pressure-sensitive adhesive composition is applied onto the release agent layer 11 of the release sheet 1 to obtain a coating film.
- the coating film is heated and dried to form a double-sided PSA sheet body 2 ′′ composed of a single PSA layer on the release agent layer 11.
- the double-sided pressure-sensitive adhesive sheet 120 can be obtained by bonding the release sheet 1 ′ to the double-sided pressure-sensitive adhesive sheet body 2 ′′ formed on the release agent layer 11.
- release agent composition release sheet, single-sided pressure-sensitive adhesive sheet (pressure-sensitive adhesive), and double-sided pressure-sensitive adhesive sheet (pressure-sensitive adhesive) of the present invention have been described above, but the present invention is not limited thereto.
- the release sheet is composed of the release agent layer and the base material.
- the release agent layer may have a function as the base material like a resin film. That is, the release sheet may be composed of a single layer.
- the manufacturing method of the peeling sheet of this invention, a single-sided adhesive sheet, and a double-sided adhesive sheet is not limited to the manufacturing method mentioned above.
- the adherend to which the pressure-sensitive adhesive body of the present invention is attached is not limited to electrical components such as relays, various switches, connectors, motors, and hard disks as described above.
- the adherend may be an industrial product such as a display, or a household product such as a window glass or a stationery.
- the obtained release agent composition was dried on a polyethylene terephthalate film (Mitsubishi Resin, product name “T-100”, thickness 50 ⁇ m) as a substrate using a Meyer bar so that the thickness after drying would be 150 nm. It was applied to. This obtained the coating film.
- a polyethylene terephthalate film Mitsubishi Resin, product name “T-100”, thickness 50 ⁇ m
- the coating film was dried at 150 ° C. for 1 minute and cured to form a release agent layer on the substrate. Thereafter, seasoning was performed in an environment of 23 ° C. and 50% RH for 1 week to obtain a release sheet comprising a base material and a release agent layer.
- DTDA refers to 2-decyltetradecanyl acrylate
- HEA 2-hydroxyethyl acrylate
- DTDMA refers to 2-decyltetradecanyl methacrylate.
- 2HDA refers to 2-hexyldecyl acrylate.
- BA refers to butyl acrylate.
- LA refers to lauryl acrylate.
- MyA refers to myristyl acrylate.
- StA refers to stearyl acrylate.
- PET film product name: PET50-T100, manufactured by Mitsubishi Chemical Corporation
- an adhesive sheet single-sided adhesive sheet
- the amount of carbon on the surface of the polyester film in contact with the release agent layer obtained by XPS surface elemental analysis is C total [atomic%], and the amount of carbon on the original polyester film surface is C b [atomic%].
- the amount of carbon on the surface of the release agent layer was C a [atomic%]
- the ratio of the release agent component on the surface in contact with the release agent layer of the polyester film (release agent component occupation ratio) was A [%].
- C total ⁇ A ⁇ C a + (100 ⁇ A) ⁇ C b ⁇ / 100. From this formula, a release agent component occupancy ratio A, which is a measure of the transfer amount of the release agent, was determined.
- PHI Quantera SXM (manufactured by ULVAC-PHI) was used for measurement by XPS of the surface of the release agent layer of the release sheet of each example and each comparative example. Further, using AlK ⁇ monochromatized as an X-ray source, measurement was performed by XPS at a photoelectron extraction angle of 45 °. Thereby, the element ratio of carbon, oxygen, and silicon present on the surface of each release agent layer was calculated.
- the adhesive sheet was cut into a width of 20 mm and a length of 200 mm to obtain a test piece.
- the test piece is fixed to a test stand of a tensile tester (Orientec Corp .: Tensilon) with double-sided tape and in accordance with JIS-Z0237, at a peel angle of 180 ° and a peel rate of 0.3 m / min. (Orientec Co., Ltd .: Tensilon) was used to measure the peel force when the release sheet was peeled from the pressure-sensitive adhesive layer.
- a tensile tester Orientec Corp .: Tensilon
- the release sheet of the present invention does not contain a silicone compound, it was difficult to adversely affect electrical components such as relays.
- a release agent composition a release sheet, a single-sided adhesive sheet, and a double-sided adhesive sheet that can sufficiently suppress adverse effects on electrical components such as relays, various switches, connectors, motors, and hard disks. can do. Therefore, the present invention has industrial applicability.
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Abstract
Description
(1) ポリエステル樹脂(A)と、アクリルポリマー(B)と、を含み、
前記アクリルポリマー(B)が、下記構造式(1)を構成単位として有しており、
前記ポリエステル樹脂(A)の配合量と前記アクリルポリマー(B)の配合量の比率は、質量比で、(A):(B)=50:50~95:5の範囲であることを特徴とする剥離剤組成物。
(3) 前記アクリルポリマー(B)が、前記構造式(1)を前記構成単位として、80質量%以上含む上記(1)または(2)に記載の剥離剤組成物。
前記粘着シート基材の片面に積層された粘着剤層と、
前記粘着剤層の粘着面に積層された2枚の剥離シートと、を有し、
前記剥離シートが上記(8)ないし(13)のいずれかに記載の剥離シートであることを特徴とする片面粘着シート。
(15) 前記粘着剤層が貼着される被着体の内容表示用に用いられる上記(14)に記載の片面粘着シート。
前記芯材の両面に積層された2つの粘着剤層と、
前記2つの粘着剤層の粘着面に積層された2枚の剥離シートと、を有し、
前記2枚の剥離シートのうちの少なくとも一方が上記(8)ないし(13)のいずれかに記載の前記剥離シートであることを特徴とする両面粘着シート。
前記粘着剤層の両面に積層した2枚の剥離シートと、を有し、
前記2枚の剥離シートのうちの少なくとも一方が上記(8)ないし(13)のいずれかに記載の前記剥離シートであることを特徴とする両面粘着シート。
<剥離シート>
図1は、本発明の剥離シートの好適な実施形態を示す縦断面図である。なお、以下の説明では、図中の上側を「上」または「上方」、下側を「下」または「下方」と言う。
以下、剥離剤組成物および剥離シートについて詳細に説明する。
基材12は、例えば、ポリエチレンテレフタレートフィルム、ポリブチレンテレフタレートフィルム等のポリエステルフィルム、ポリプロピレンフィルムやポリメチルペンテンフィルム等のポリオレフィンフィルム、ポリカーボネートフィルム等のプラスチックフィルム、アルミニウム、ステンレス等の金属箔、グラシン紙、上質紙、コート紙、含浸紙、合成紙等の紙、これら紙基材にポリエチレンなどの熱可塑性樹脂をラミネートした紙等で構成されている。
本発明の剥離剤組成物は、ポリエステル樹脂(A)と、アクリルポリマー(B)と、を含み、アクリルポリマー(B)が、下記構造式(1)を構成単位として有しており、ポリエステル樹脂(A)の配合量とアクリルポリマー(B)の配合量の比率は、質量比で、(A):(B)=50:50~95:5の範囲である点に特徴を有している。
[ポリエステル樹脂(A)]
ポリエステル樹脂(A)としては、特に限定されず、公知のポリエステル樹脂の中から適宜選択して用いることができる。具体的なポリエステル樹脂としては、多価アルコールと多塩基酸との縮合反応によって得られる樹脂が挙げられる。例えば、二塩基酸と二価アルコールとの縮合物若しくは不乾性油脂肪酸等で変性した不転化性ポリエステル樹脂、および二塩基酸と三価以上のアルコールとの縮合物である転化性ポリエステル樹脂等が挙げられ、本発明においては、これらのうちいずれも使用することができる。
アクリルポリマー(B)は、上記構造式(1)を構成単位として有している。このようなアクリルポリマー(B)を剥離剤組成物中に含むことにより、剥離剤組成物が剥離シート1の裏面(基材12の剥離剤層11とは反対側の面)へ移行することを抑制することができる。その結果、剥離シート1の裏面を経由して粘着シート本体の表面に剥離剤組成物が移行するのを抑制することができ、粘着シート本体の表面の印字性・印刷性が良好となる。また、剥離シート1に軽剥離性を付与することができる。
剥離剤組成物は、上記成分の他、架橋剤(C)を含んでいてもよい。
X線:AlKα(1486.6eV)
取出し角度:45°
測定元素:ケイ素(Si)、酸素(O)および炭素(C)
以下、片面粘着シートの好適な実施形態について説明する。
図2は、本発明の片面粘着シートの好適な実施形態を示す縦断面図である。
粘着剤としては、例えば、アクリル系粘着剤、ポリエステル系粘着剤、ウレタン系粘着剤が挙げられる。
次に、本発明の両面粘着シートの好適な実施形態について説明する。
粘着剤層21Aおよび21Bを構成する粘着剤組成物としては、片面粘着シート100の粘着剤層21を構成する上記粘着剤組成物を用いることができる。
次に、本発明の両面粘着シートの好適な実施形態について説明する。
次に、剥離シート1および片面粘着シート100の製造方法の一例について説明する。
次に、第1実施形態に係る両面粘着シート110の製造方法の一例について説明する。
その後、芯材22’と、剥離シート1’上に形成した粘着剤層21Bとを貼合することにより、両面粘着シート110を得ることができる。
次に、第2実施形態に係る両面粘着シート120の製造方法の一例について説明する。
また、本発明の粘着体が貼着される被着体は、前述したようなリレー、各種スイッチ、コネクタ、モータ、ハードディスク等の電気部品に限定されない。例えば、被着体は、ディスプレイ等の工業製品や、窓ガラス、文房具等の家庭用品等であってもよい。
[1]剥離シートの作製
(実施例1)
まず、ポリエステル樹脂(東洋紡績社製、商品名「バイロン220」、数平均分子量(Mn):3000、水酸基価:50mgKOH/g、ガラス転移温度53℃)の35%トルエン溶液100質量部(固形分として35質量部)と、アクリルポリマー(質量比:DTDA/HEA=99/1)の30%トルエン溶液50質量部(固形分として15質量部)と、架橋剤としてのメラミン樹脂(寿化工社製、商品名「TF200」、固形分80質量%)5質量部(固形分として4質量部)と、混合溶媒(トルエン:メチルエチルケトン=70:30(質量比))と、を混合し攪拌して混合液を得た。
アクリルポリマー(質量比:DTDA/HEA=99/1)の代わりに、アクリルポリマー(質量比:DTDMA/HEA=99/1)を用いた以外は、上記実施例1と同様にして剥離シートを作製した。
アクリルポリマー(質量比:DTDA/HEA=99/1)の代わりに、アクリルポリマー(質量比:2HDA/HEA=99/1)を用いた以外は、上記実施例1と同様にして剥離シートを作製した。
アクリルポリマー(質量比:DTDA/HEA=99/1)の代わりに、アクリルポリマー(質量比:DTDA/HEA=95/5)を用いた以外は、上記実施例1と同様にして剥離シートを作製した。
アクリルポリマー(質量比:DTDA/HEA=99/1)の代わりに、アクリルポリマー(質量比:BA/HEA=99/1)を用いた以外は、上記実施例1と同様にして剥離シートを作製した。
なお、上記文中、BAはブチルアクリレートを指す。
アクリルポリマー(質量比:DTDA/HEA=99/1)の代わりに、アクリルポリマー(質量比:LA/HEA=99/1)を用いた以外は、上記実施例1と同様にして剥離シートを作製した。
なお、上記文中、LAはラウリルアクリレートを指す。
アクリルポリマー(質量比:DTDA/HEA=99/1)の代わりに、アクリルポリマー(質量比:MyA/HEA=99/1)を用いた以外は、上記実施例1と同様にして剥離シートを作製した。
なお、上記文中、MyAはミリスチルアクリレートを指す。
アクリルポリマー(質量比:DTDA/HEA=99/1)の代わりに、アクリルポリマー(質量比:StA/HEA=99/1)を用いた以外は、上記実施例1と同様にして剥離シートを作製した。
なお、上記文中、StAはステアリルアクリレートを指す。
各実施例および各比較例の剥離シート上に、粘着剤(トーヨーケム製、商品名「BPS-5127」)を乾燥後の膜厚が約25μmとなるようにアプリケーターを用いて塗布し塗膜を得た。得られた塗膜を100℃で2分間加熱して乾燥させ、粘着剤層を形成した。
[剥離剤成分占有比率の測定]
ポリエステルフィルム(三菱化学ポリエステルフィルム製、商品名:PET50-T100)と、各実施例および各比較例の剥離シートの剥離剤層とを接触させ、常温、10kg/cm2の圧力下で24時間静置した。その後、ポリエステルフィルムから剥離剤層を除去し、ポリエステルフィルムの剥離剤層と接触させた面をXPSによる表面元素分析した。これにより得られた元素比率を用いて、ポリエステルフィルムの剥離剤層11と接触させた表面の剥離剤成分占有比率Aを算出した。
各実施例および各比較例の剥離シートの剥離剤層の表面のXPSによる測定には、PHI Quantera SXM(アルバック・ファイ社製)を使用した。また、X線源として単色化されたAlKαを用いて、光電子取り出し角度45°にてXPSによる測定を行った。これにより、各剥離剤層の表面に存在する炭素、酸素およびケイ素の元素比率を算出した。
各実施例および各比較例の剥離シートの剥離剤層の表面の、水、ジヨードメタンおよびジブロモナフタレンの3液に対する接触角を、接触角計(協和界面科学社製、DM-701)を用いて23℃50%RHの環境下で測定し、北崎・畑法により表面自由エネルギーを算出した。
各実施例および各比較例の剥離シートを備えた粘着シートを23℃50%RHの環境下において1週間シーズニングした。
110、120 両面粘着シート
1、1’ 剥離シート
11、11’ 剥離剤層
12、12’ 基材
2 片面粘着シート本体
2’、2” 両面粘着シート本体
21、21A、21B 粘着剤層
22 粘着シート基材
22’ 芯材
Claims (17)
- さらに架橋剤(C)を含む請求項1に記載の剥離剤組成物。
- 前記アクリルポリマー(B)が、前記構造式(1)を前記構成単位として、80質量%以上含む請求項1または2に記載の剥離剤組成物。
- 前記アクリルポリマー(B)は、さらに、水酸基、アミノ基、および、カルボキシル基からなる群から選択される少なくとも1種の官能基を有する請求項1ないし3のいずれか1項に記載の剥離剤組成物。
- 前記ポリエステル樹脂(A)の数平均分子量は、500以上10000以下である請求項1ないし4のいずれか1項に記載の剥離剤組成物。
- 前記アクリルポリマー(B)の質量平均分子量は、50000以上500000以下である請求項1ないし5のいずれか1項に記載の剥離剤組成物。
- 前記剥離剤組成物のX線光電子分光法(XPS)により測定されるシリコーン化合物の量が0.5原子%以下である請求項1ないし6のいずれか1項に記載の剥離剤組成物。
- 基材と、該基材の少なくとも一方の面側に設けられ、請求項1ないし7のいずれか1項に記載の前記剥離剤組成物の硬化物で構成された剥離剤層と、を備えることを特徴とする剥離シート。
- 接触角法により測定される前記剥離剤層の表面自由エネルギーは、40mJ/m2以下である請求項8に記載の剥離シート。
- XPSによる表面元素分析における前記剥離剤層の表面のC元素の比率は、85原子%以上である請求項8または9に記載の剥離シート。
- XPSによる表面元素分析における前記剥離剤層の表面のSi元素の比率は、0.5原子%よりも小さい請求項8ないし10のいずれか1項に記載の剥離シート。
- ポリエステルフィルムと、前記剥離シートの前記剥離剤層とを接触させ、常温、10kg/cm2の圧力下で24時間静置した後の、前記ポリエステルフィルムの前記剥離剤層と接触している面を、XPSによる表面元素分析をして得られる前記ポリエステルフィルムにおける剥離剤成分占有比率は、40%以下である請求項8ないし11のいずれか1項に記載の剥離シート。
- 前記剥離剤層の平均厚さは、0.01μm以上1.0μm以下である請求項8ないし12のいずれか1項に記載の剥離シート。
- 粘着シート基材と、
前記粘着シート基材の片面に積層された粘着剤層と、
前記粘着剤層の粘着面に積層された剥離シートと、を有し、
前記剥離シートが請求項8ないし13のいずれか1項に記載の剥離シートであることを特徴とする片面粘着シート。 - 前記粘着剤層が貼着される被着体の内容表示用に用いられる請求項14に記載の片面粘着シート。
- 芯材と、
前記芯材の両面に積層された2つの粘着剤層と、
前記2つの粘着剤層の粘着面に積層された2枚の剥離シートと、を有し、
前記2枚の剥離シートのうちの少なくとも一方が請求項8ないし13のいずれか1項に記載の前記剥離シートであることを特徴とする両面粘着シート。 - 粘着剤層と、
前記粘着剤層の両面に積層した2枚の剥離シートと、を有し、
前記2枚の剥離シートのうちの少なくとも一方が請求項8ないし13のいずれか1項に記載の前記剥離シートであることを特徴とする両面粘着シート。
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JP2018115224A (ja) * | 2017-01-16 | 2018-07-26 | 荒川化学工業株式会社 | 熱硬化剥離コーティング剤ならびに剥離フィルムおよびその製造方法 |
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JP7192265B2 (ja) | 2017-06-27 | 2022-12-20 | 王子ホールディングス株式会社 | 剥離性フィルム |
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WO2022149377A1 (ja) * | 2021-01-05 | 2022-07-14 | 東レ株式会社 | 積層フィルムおよびその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
US20180029329A1 (en) | 2018-02-01 |
TW201631027A (zh) | 2016-09-01 |
SG11201706582UA (en) | 2017-09-28 |
JPWO2016136759A1 (ja) | 2017-11-30 |
TWI646147B (zh) | 2019-01-01 |
CN107429144B (zh) | 2021-04-23 |
CN107429144A (zh) | 2017-12-01 |
KR20170125347A (ko) | 2017-11-14 |
KR101992704B1 (ko) | 2019-06-25 |
JP6382438B2 (ja) | 2018-08-29 |
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