WO2017006609A1 - Composition d'adhésif acrylique pour élément adhésif double face occultant la lumière, élément adhésif double face occultant la lumière, et dispositif d'affichage d'image - Google Patents

Composition d'adhésif acrylique pour élément adhésif double face occultant la lumière, élément adhésif double face occultant la lumière, et dispositif d'affichage d'image Download PDF

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Publication number
WO2017006609A1
WO2017006609A1 PCT/JP2016/062537 JP2016062537W WO2017006609A1 WO 2017006609 A1 WO2017006609 A1 WO 2017006609A1 JP 2016062537 W JP2016062537 W JP 2016062537W WO 2017006609 A1 WO2017006609 A1 WO 2017006609A1
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WO
WIPO (PCT)
Prior art keywords
sensitive adhesive
light
pressure
adhesive member
acrylic
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Application number
PCT/JP2016/062537
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English (en)
Japanese (ja)
Inventor
明星 安
冨田　幸二
Original Assignee
綜研化学株式会社
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Priority to CN201680000401.4A priority Critical patent/CN106536664B/zh
Publication of WO2017006609A1 publication Critical patent/WO2017006609A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
    • 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
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • 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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • 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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • 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
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • 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
    • C09J2433/00—Presence of (meth)acrylic polymer

Definitions

  • the present invention relates to an acrylic pressure-sensitive adhesive composition for a light-shielding double-sided pressure-sensitive adhesive member, a light-shielding double-sided pressure-sensitive adhesive member, and an image display device.
  • a non-self-luminous display unit such as a liquid crystal display module unit and a backlight unit are attached by a double-sided adhesive member such as a double-sided adhesive tape having at least a light shielding function.
  • a double-sided adhesive member such as a double-sided adhesive tape having at least a light shielding function.
  • Patent Document 1 discloses a glass transition temperature of 60) when a) an acrylic polymer and b) a homopolymer are formed.
  • Acrylic adhesive comprising a low molecular weight polymer component having a weight average molecular weight of 3000 to less than 20000, the main component of which is an ethylenically unsaturated monomer monomer having a cyclic structure in the molecule at a temperature of ⁇ 190 ° C.
  • a double-sided pressure-sensitive adhesive member provided with a pressure-sensitive adhesive layer formed of an adhesive composition has been proposed.
  • the non-self-luminous display unit is a display unit that is driven and controlled by a circuit board, such as a liquid crystal module unit
  • the display unit and the backlight unit are connected via an FPC (Flexible printed circuits).
  • FPC Flexible printed circuits
  • the FPC normally connects both units in a bent state, and therefore, a repulsive force caused by the bent FPC acts between the two units. Therefore, such a repulsive force acts strongly as a force for peeling off the sticking interface between the unit and the double-sided pressure-sensitive adhesive member.
  • the double-sided adhesive member is cut into a desired shape or length, or the double-sided adhesive member is adhered and fixed to the surface of the unit. Work is required. Therefore, the double-sided pressure-sensitive adhesive member is also required to have such characteristics that these sticking operations can be performed easily and reliably.
  • the present invention has been made in view of the above circumstances, and is an acrylic system for a light-shielding double-sided pressure-sensitive adhesive member that hardly peels off from a resin-coated surface and has excellent workability at the time of sticking. It is an object of the present invention to provide a light-blocking double-sided pressure-sensitive adhesive member using a pressure-sensitive adhesive composition, an acrylic pressure-sensitive adhesive composition for light-blocking double-sided pressure-sensitive adhesive members, and an image display device using the light-blocking double-sided pressure-sensitive adhesive member.
  • the acrylic pressure-sensitive adhesive composition for a light-shielding double-sided pressure-sensitive adhesive member of the present invention has an acrylic monomer having a glass transition temperature of 0 ° C. to 80 ° C. when a homopolymer is formed and having no crosslinkable functional group And an acrylic polymer obtained by copolymerizing a monomer mixture containing 10 to 30% by weight of a monomer and 2 to 7% by weight of a monomer containing a carboxyl group, and the weight average molecular weight of the acrylic polymer is 750,000 to It is characterized by being 1.25 million.
  • one embodiment of the acrylic pressure-sensitive adhesive composition for a light-shielding double-sided pressure-sensitive adhesive member of the present invention is used for sticking to a member whose adherend surface is made of a polycarbonate resin.
  • acrylic pressure-sensitive adhesive composition for light-shielding double-sided pressure-sensitive adhesive members of the present invention preferably further contain a rosin ester resin.
  • the light-shielding double-sided pressure-sensitive adhesive member of the present invention includes a film-like base material, a pressure-sensitive adhesive layer provided on at least one side of the base material, and comprising the acrylic pressure-sensitive adhesive composition for the light-shielding double-sided pressure-sensitive adhesive member of the present invention, And at least.
  • the image display device of the present invention comprises at least a non-self-luminous display unit, a backlight unit, and the light-shielding double-sided adhesive member of the present invention disposed between the non-self-luminous display unit and the backlight unit. It is characterized by providing.
  • the non-self-luminous display unit is preferably a liquid crystal display module unit.
  • the surface of the backlight unit that is in contact with the light-shielding double-sided pressure-sensitive adhesive member is preferably made of a polycarbonate resin.
  • an acrylic pressure-sensitive adhesive composition for a light-shielding double-sided pressure-sensitive adhesive member which is unlikely to peel off from an adherend surface made of a resin and excellent in workability at the time of sticking, and a light-shielding double-sided pressure-sensitive adhesive member
  • a light-shielding double-sided pressure-sensitive adhesive member using the acrylic pressure-sensitive adhesive composition for use, and an image display device using the light-shielding double-sided pressure-sensitive adhesive member can be provided.
  • the acrylic pressure-sensitive adhesive composition for light-shielding double-sided pressure-sensitive adhesive members of the present embodiment (hereinafter sometimes simply referred to as “pressure-sensitive adhesive composition”) has a glass transition temperature of 0 ° C. to 80 ° C. when a homopolymer is formed. And obtained by copolymerizing a monomer mixture containing 10 to 30% by weight of an acrylic monomer having no crosslinkable functional group and 2 to 7% by weight of a monomer containing a carboxyl group. An acrylic polymer is included, and the acrylic polymer has a weight average molecular weight of 750,000 to 12,500.
  • the pressure-sensitive adhesive composition of this embodiment contains an acrylic polymer as a main component.
  • the weight average molecular weight of this acrylic polymer measured by GPC (Gel Permeation Chromatography) method is 750,000 to 12,500, preferably 800,000 to 1,200,000, and more preferably 900,000 to 1,000,000.
  • GPC Gel Permeation Chromatography
  • the weight average molecular weight exceeds 1.25 million, the pressure-sensitive adhesive layer becomes too hard, so that tackiness is greatly reduced. That is, when the weight average molecular weight is outside the range of 750,000 to 12,500, workability at the time of cutting and sticking the light-shielding double-sided pressure-sensitive adhesive member decreases.
  • the acrylic monomer (a) used for copolymerization of acrylic polymer does not have a crosslinkable functional group, and has a glass transition temperature of 0 ° C. to 80 ° C. when forming a homopolymer. .
  • the glass transition temperature is preferably 0 ° C.
  • crosslinkable functional group examples include a carboxyl group, a hydroxyl group, an amino group, an amide group, a cyano group, and a thiol group.
  • Methyl acrylate can be suitably used as the above-mentioned (a) acrylic monomer.
  • an alkyl (meth) acrylate monomer having an alkyl group having 1 to 7 carbon atoms a cycloalkyl (meth) acrylate monomer having a cycloalkyl group having 3 to 7 carbon atoms, and an aralkyl group having 7 to 9 carbon atoms.
  • aralkyl (meth) acrylate monomers having monomers having a glass transition temperature in the range of 0 ° C. to 80 ° C. are also included.
  • acrylate monomers include, in addition to the above-mentioned methyl acrylate, isobutyl methacrylate, tetrahydrofurfuryl methacrylate, n-butyl methacrylate, cyclohexyl acrylate, benzyl acrylate, and the like.
  • any monomer containing a carboxyl group in the molecule can be used without particular limitation. It is particularly preferable to use acrylic acid.
  • the acrylic polymer is obtained by copolymerizing a monomer mixture containing (a) 10 to 30% by weight of an acrylic monomer and (b) 2 to 7% by weight of a monomer containing a carboxyl group.
  • a monomer mixture containing (a) 10 to 30% by weight of an acrylic monomer and (b) 2 to 7% by weight of a monomer containing a carboxyl group.
  • work can be acquired by the mixture ratio of the monomer containing (b) carboxyl group being 7 weight% or less.
  • the blending ratio of (a) acrylic monomer is preferably 10 to 25% by weight, and the blending ratio of (b) monomer containing a carboxyl group is preferably 3 to 6% by weight.
  • (c) other monomers other than the above (a) acrylic monomer and (b) a monomer containing a carboxyl group are used in the copolymerization of the acrylic polymer, and (c) other monomer in the monomer mixture.
  • the blending ratio of (a) is the remaining amount excluding the blending amount of the acrylic monomer and (b) the blending amount of the monomer containing a carboxyl group, that is, 63 to 88% by weight.
  • (C) Other monomers include known monomers used for copolymerization of adhesive polymers (except for those corresponding to (a) acrylic monomers and (b) carboxyl group-containing monomers). Can be appropriately selected from, for example, 2-ethylhexyl acrylate, butyl acrylate, 2-hydroxyethyl acrylate, 4-hydroxybutyl acrylate, acrylamide, and the like.
  • a high molecular weight monomer having a polymerizable functional group in addition to the above-described general low molecular weight monomer.
  • a macromonomer has a methacryloyl group and / or a dihydroxyl group as a terminal functional group, a methyl methacrylate, styrene-acrylonitrile, butyl acrylate, or the like as a segment, and a number average molecular weight of about 3000 to 10,000. These monomers are mentioned.
  • the blending ratio in the monomer mixture is preferably about 0.5 to 5% by weight.
  • the pressure-sensitive adhesive composition of the present embodiment may contain other components as required in addition to the acrylic polymer.
  • a rosin ester resin as a tackifier resin
  • a polymerized rosin ester resin By using a rosin ester resin in addition to an acrylic polymer as a component constituting the pressure-sensitive adhesive composition, for example, an olefin-based adherend such as polyethylene and polypropylene, which is generally a hardly adherent adherend for acrylic pressure-sensitive adhesives. Can exhibit good adhesiveness (adhesiveness), and can improve the constant load peel resistance of the resulting pressure-sensitive adhesive layer.
  • the blending amount of the rosin ester resin with respect to 100 parts by weight of the acrylic polymer is more than 0 parts by weight, preferably 35 parts by weight, more preferably 5 to 25 parts by weight, and 15 to 25 parts by weight. Part is more preferred.
  • the adhesive composition of this embodiment is used for the adhesive layer which comprises the light-shielding double-sided adhesive member which has a light-shielding function at least, it has light-shielding properties, such as a black color material, as another component.
  • the substance may be contained in an appropriate amount as long as the function of the pressure-sensitive adhesive layer is not impaired.
  • a reflective material such as a white color material or a silver color material as the other component functions as a pressure-sensitive adhesive layer. It may be contained in an appropriate amount as long as it does not inhibit.
  • the adhesive composition of this embodiment demonstrated above can be utilized for the sticking to various solid surfaces, it is used for the sticking to the members (resin substrate etc.) which a to-be-coated surface consists of resin. Particularly, it is particularly preferable to use for adhesion to a member (a polycarbonate substrate or the like) whose surface to be adhered is made of a polycarbonate resin.
  • the light-shielding double-sided pressure-sensitive adhesive member of the present embodiment (hereinafter sometimes simply referred to as “adhesive member”) includes at least a film-like substrate and a pressure-sensitive adhesive layer containing the pressure-sensitive adhesive composition of the present embodiment. Prepare. Further, in the pressure-sensitive adhesive member of the present embodiment, the pressure-sensitive adhesive layer is provided on both surfaces of the base material. Of these two pressure-sensitive adhesive layers, at least one pressure-sensitive adhesive layer contains the pressure-sensitive adhesive composition of the present embodiment. It only has to be. However, it is usually particularly preferable that the pressure-sensitive adhesive composition of the present embodiment is contained in the pressure-sensitive adhesive layers respectively provided on both sides of the base material from the viewpoint of allowing the pressure-sensitive adhesive member to be used without distinction between the front and back sides. .
  • the adhesive member of this embodiment has at least a light blocking function that blocks transmission of light from one surface side to the other surface side and in the opposite direction.
  • This light shielding function may be exhibited only by the base material, or may be exhibited only by the pressure-sensitive adhesive layer provided on both sides or one side of the base. The base and the both sides or one side of the base It may be demonstrated by the combination with the adhesive layer provided in the.
  • the pressure-sensitive adhesive member of this embodiment may have a reflection function of reflecting light incident from one surface side in addition to the light shielding function. This reflection function may be exhibited only by the base material, or may be exhibited only by the pressure-sensitive adhesive layer provided only on one surface side of the base material, and only the base material and one surface side of the base material. It may be exhibited by a combination with the pressure-sensitive adhesive layer provided on the surface.
  • the layer structure of the substrate is not particularly limited, and may be a single layer structure or a multilayer structure of two or more layers.
  • the thickness of the substrate is not particularly limited, but can be appropriately selected from the range of 1 to 3000 ⁇ m, for example.
  • As the base material at least a film-like member such as a film made of a fibrous substance such as a resin film, a metal film, and pulp fiber is used, and a printing layer is provided on one or both sides of the film-like member as necessary.
  • a metal layer or the like can be provided as appropriate.
  • a resin film as the film-like member.
  • a known resin film such as a polyethylene terephthalate film (PET film), a polyethylene film, or a polypropylene film can be appropriately used.
  • PET film polyethylene terephthalate film
  • a normal resin film does not have sufficient light-shielding property and reflectivity.
  • a black color material such as a black pigment is dispersed in the resin film matrix, and when imparting reflectivity to the resin film itself,
  • a white color material such as a white pigment or a silver color material such as a silver pigment may be dispersed and contained.
  • the resin film which has light-shielding property, and the resin film which has reflectivity can be laminated
  • black color materials for example, carbon black, graphite, copper oxide, manganese dioxide, aniline black, perylene black, titanium black, cyanine black, activated carbon, ferrite, magnetite, chromium oxide, molybdenum disulfide, composite oxide And black anthraquinone organic black pigments.
  • black color materials can be used alone or in combination of two or more.
  • white color materials include titanium oxide, zinc oxide, aluminum oxide, silicon oxide, zirconium oxide, magnesium oxide, calcium oxide, tin oxide, barium oxide, cesium oxide, yttrium oxide, magnesium carbonate, calcium carbonate, and barium carbonate.
  • a fluorescent whitening agent can also be used as the white colorant, and the fluorescent whitening agent can be appropriately selected from known fluorescent whitening agents. These white color materials can be used alone or in combination of two or more.
  • a silver-based color material for example, the surface of a flaky metal such as silver or aluminum or a flaky glass particle is coated with a metal film or a metal oxide film to give the glitter. And a luster pigment provided with.
  • a flaky metal such as silver or aluminum or a flaky glass particle is coated with a metal film or a metal oxide film to give the glitter.
  • a luster pigment provided with can be used alone or in combination of two or more.
  • the base material can be provided with light-shielding properties or light-reflecting properties as well as light-reflecting properties.
  • a light-shielding printing layer (light-shielding layer) is formed on one surface of a resin film using an ink containing a black color material in a dispersed manner, and a white color material is formed on the other surface as necessary.
  • a reflective printed layer (reflective layer) can be formed using ink containing silver color material dispersion.
  • the pressure-sensitive adhesive member of this embodiment may basically have a layer structure in which a pressure-sensitive adhesive layer, a base material, and a pressure-sensitive adhesive layer are laminated in this order, but usually covers the surfaces of the pressure-sensitive adhesive layers on both sides.
  • a release film is further provided. However, this release film is peeled off when the adhesive member is used.
  • As the release film a resin film in which at least the surface in contact with the pressure-sensitive adhesive layer has peelability can be used as appropriate. Further, the thickness of each layer constituting the light-shielding double-sided pressure-sensitive adhesive member and the amount of color material used in the case of using a color material are appropriately selected so that the light-shielding property and the reflectivity further imparted as necessary can be exhibited. be able to.
  • the transmittance of the pressure-sensitive adhesive member of this embodiment is preferably 0.5% or less, more preferably 0.3% or less, and further preferably 0.1% or less.
  • the reflectance of the pressure-sensitive adhesive member of this embodiment is preferably 60% or more, more preferably 70% or more, and even more preferably 80% or more.
  • FIG. 1 to 4 are schematic cross-sectional views showing an example of the layer structure of the adhesive member of the present embodiment.
  • pressure-sensitive adhesive member 10A 10A shown in FIG. 1
  • pressure-sensitive adhesive layers 30 formed using the pressure-sensitive adhesive composition of the present embodiment are provided on both surfaces of a base material 20A (20).
  • a release sheet 40 made of a resin film is provided so as to cover the surface of the layer 30 opposite to the side on which the base material 20A is provided.
  • 20 A of base materials consist of a resin film (light-shielding resin film) containing the black color material which functions as a light shielding layer.
  • 2 has the same layer structure as that of the adhesive member 10A shown in FIG. 1 except that the layer structure of the base material 20 is different.
  • the base material 20B (20) shown in FIG. 2 contains a resin film (light-shielding resin film 22S (light-shielding layer)) containing a black color material and a white color material or a silver color material. It consists of the laminated body which laminated
  • the adhesive member 10C (10) shown in FIG. 3 has the same layer structure as the adhesive member 10A shown in FIG. 1 except that the layer structure of the substrate 20 is different.
  • the base material 20C (20) shown in FIG. 3 is a normal resin film 24T having no light-shielding property or reflectivity, and an ink containing a black color material provided on one surface of the resin film 24T.
  • a light-shielding layer 24S composed of a printing layer formed using a resin layer and a printing layer provided on the other surface of the resin film 24T and formed using an ink containing a white color material or a silver color material, or aluminum
  • a reflective layer 24R made of a metal layer formed by vapor deposition of a metal such as.
  • the adhesive member 10D (10) shown in FIG. 4 has the same layer structure as the adhesive member 10C shown in FIG. 3 except that the layer structure of the base material 20 is different.
  • the base material 20D (20) shown in FIG. 4 uses a resin film 24T that does not have a normal light-shielding property or reflectivity, and ink that is provided on both surfaces of the resin film 24T and contains a black color material. And a light shielding layer 24S made of a printed layer.
  • the shape in the planar direction of the pressure-sensitive adhesive member of the present embodiment is not particularly limited.
  • the contour shape of the adherend surface of the object to be adhered It may be an annular shape having an outer peripheral shape substantially corresponding to.
  • the adhesive member of the present embodiment is usually preferably used for adhering a non-self-luminous display unit, in particular, a liquid crystal display module unit and a backlight unit, but between two members to be adhered. As long as it is required to shield at least light, it can be used for applications other than those described above. Moreover, when the adhesive member of this embodiment used for sticking a non-self-luminous display unit and a backlight unit also has reflectivity as illustrated in FIGS. 2 and 3, the luminance of the backlight unit In order to further improve the above, the surface on which light is reflected is attached to the backlight unit.
  • a resin substrate such as a polycarbonate substrate is usually used as the surface (attachment surface) on which the non-self-luminous display unit of the backlight unit is disposed.
  • the image display device manufactured using the adhesive member of the present embodiment includes a non-self-luminous display unit, a backlight unit, and an adhesive member of the present embodiment disposed between these units (however, affixed) If the non-self-luminous display unit is a unit that is driven by a power source such as a liquid crystal display module unit, etc.
  • a drive circuit such as an FPC connected to the unit is further provided.
  • both units are connected to one end and the other end of the bent FPC, for example, an image mounted on an electronic device such as a smartphone, a mobile phone, a tablet PC, a notebook computer, or a wearable terminal.
  • an electronic device such as a smartphone, a mobile phone, a tablet PC, a notebook computer, or a wearable terminal.
  • a strong repulsive force that tends to peel off both units from each other by the bent FPC is likely to act.
  • both of the units have a strong repulsive force due to excellent peeling resistance to the adherent surface of the pressure-sensitive adhesive layer (particularly, a polycarbonate substrate that easily generates outgas in a high-temperature environment).
  • Carboxyl-containing monomer AA Acrylic acid (homopolymer glass transition temperature: 106 ° C.)
  • a tackifier resin (TF1) and a curing agent (L-45) were further mixed with this polymer solution to prepare a coating solution for forming an adhesive layer.
  • the solid content (acrylic polymer) contained in the polymer solution were mixed in parts.
  • An adhesive member 10C having the layer structure shown in FIG. 3 was prepared by the following procedure. First, as a resin film 24T, aluminum was deposited on one surface of a PET film having a thickness of 12 ⁇ m (M310E12, manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.) under a condition of 10 ⁇ 2 Pa so that the deposited film thickness was 50 nm. Thus, the reflective layer 24R was formed. Next, on the other side of the PET film, 100 parts by weight of polyester resin Byron 20SS manufactured by Toyobo Co., Ltd., 30 parts by weight of black dye BM1500 manufactured by Kouka Chemical Co., Ltd., and Coronate manufactured by Nippon Polyurethane Industry Co., Ltd.
  • polyester resin Byron 20SS manufactured by Toyobo Co., Ltd. 30 parts by weight of black dye BM1500 manufactured by Kouka Chemical Co., Ltd., and Coronate manufactured by Nippon Polyurethane Industry Co., Ltd.
  • a black ink mixed with 2 parts by weight of L was printed to form a light-shielding layer 24S composed of a black print layer having a thickness of 5 ⁇ m.
  • the base material 20C which consists of a laminated body which laminated
  • the reflectance and the transmittance were measured in a state where the release sheet 40 was peeled off from the obtained adhesive member 10C, the 550 nm wavelength light on the surface provided with the reflective layer 24R measured according to JIS Z 8730 was measured.
  • the reflectance was 60% or more, and the total light transmittance measured in accordance with JIS K 7361 was 0.5% or less, and it was confirmed that the film had sufficient reflectivity and light shielding properties.
  • Examples 2 to 7, Comparative Examples 1 to 6> A pressure-sensitive adhesive member was produced in the same manner as in Example 1 except that the types and blending ratios of various raw materials used for adjusting the pressure-sensitive adhesive layer-forming coating solution were changed as shown in Table 1. However, the polymerization time for synthesizing the acrylic polymer was appropriately adjusted as necessary so that a desired weight average molecular weight was obtained.
  • the reflectance and total light transmittance were evaluated in the same manner as in Example 1. In any of the Examples and Comparative Examples, the reflectance was 60% or more. And, it was confirmed that the total light transmittance was 0.5% or more and had sufficient reflectivity and light shielding properties.
  • Measuring device HLC-8120GPC (manufactured by Tosoh Corporation)
  • GPC column configuration The following five columns (all manufactured by Tosoh Corporation) (1) TSK-GEL HXL-H (guard column) (2) TSK-GEL G7000HXL (3) TSK-GEL GMHXL (4) TSK-GEL GMHXL (5) TSK-GEL G2500HXL Diluted with tetrahydrofuran so that the sample concentration is 1.0 mg / cm 3
  • Mobile phase solvent Tetrahydrofuran Flow rate: 1.0 cm 3 / min Column temperature: 40 ° C.
  • a pressure-sensitive adhesive layer was formed on one side of a PET film having a thickness of 25 ⁇ m under the same conditions as those for the pressure-sensitive adhesive members of Examples and Comparative Examples. Next, the surface of the formed pressure-sensitive adhesive layer and the PET release film were formed. And aged for 7 days, and finally cut into a size of 20 ⁇ 50 mm to prepare a test piece. Then, the test piece which peeled the PET peeling film was bonded together to the lower surface side of the polycarbonate substrate arrange
  • the peeling distance is 10.0 mm or less.
  • the diameter of the steel ball used is X / 32 inches (where X is an integer in the range of 1 to 32), and the numerical values shown in Table 1 mean the value of X. Note that in the good determination ( ⁇ determination), the X value is 6 or more.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Selon l'invention, un pelage vis-à-vis d'une face support de collage constituée de résine, est peu susceptible de se produire, et l'usinabilité lors du collage est excellente. Plus précisément, l'invention concerne une composition d'adhésif acrylique pour élément adhésif double face occultant la lumière qui est caractéristique en ce que sa température de transition vitreuse lorsqu'un homopolymère est configuré est comprise entre 0 et 80°C, elle contient un polymère acrylique obtenu par copolymérisation d'un mélange de monomère contenant 10 à 30% en masse d'un monomère acrylique exempt de groupe fonctionnel réticulable, et 2 à 7% en masse d'un monomère comprenant un groupe carboxyle, et la masse moléculaire moyenne en poids du polymère acrylique est comprise entre 750000 et 1250000. L'invention concerne également un élément adhésif double face occultant la lumière mettant en œuvre la composition d'adhésif acrylique pour élément adhésif double face occultant la lumière, et un dispositif d'affichage d'image mettant en œuvre cet élément adhésif double face occultant la lumière.
PCT/JP2016/062537 2015-07-06 2016-04-20 Composition d'adhésif acrylique pour élément adhésif double face occultant la lumière, élément adhésif double face occultant la lumière, et dispositif d'affichage d'image WO2017006609A1 (fr)

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JP7052298B2 (ja) * 2017-11-06 2022-04-12 東洋インキＳｃホールディングス株式会社 光学用粘着剤および光学粘着シート
US20200213139A1 (en) * 2018-12-28 2020-07-02 Microchip Technology Incorporated Classifying comparators based on comparator offsets
CN114621710A (zh) * 2020-12-10 2022-06-14 安佐化学有限公司 一种隐形车衣用粘着剂及其制备方法和应用
JP7287415B2 (ja) * 2021-03-31 2023-06-06 大日本印刷株式会社 化粧材

Citations (3)

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JP2007277521A (ja) * 2006-03-15 2007-10-25 Nitto Denko Corp 両面粘着テープ又はシート、および液晶表示装置
JP2011084733A (ja) * 2009-09-16 2011-04-28 Dic Corp 遮光性粘着剤組成物及び遮光性粘着テープ
WO2013191106A1 (fr) * 2012-06-21 2013-12-27 Dic株式会社 Ruban adhésif

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CN101037574A (zh) * 2006-03-15 2007-09-19 日东电工株式会社 双面压敏粘着带或片和液晶显示器
JP2008056880A (ja) * 2006-09-04 2008-03-13 Nitto Denko Corp 粘着剤組成物及び粘着剤層
CN102471657B (zh) * 2009-07-16 2014-09-17 积水化学工业株式会社 粘合胶带、层叠体及图像显示装置
CN104024363B (zh) * 2011-12-28 2016-08-31 综研化学株式会社 光学部件用粘结剂组合物、粘结片、光学部件及显示器
KR101757569B1 (ko) * 2012-12-14 2017-07-12 소켄 케미칼 앤드 엔지니어링 캄파니, 리미티드 광학 필름용 점착제 조성물 및 점착형 광학 필름, 그리고 적층체

Patent Citations (3)

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JP2007277521A (ja) * 2006-03-15 2007-10-25 Nitto Denko Corp 両面粘着テープ又はシート、および液晶表示装置
JP2011084733A (ja) * 2009-09-16 2011-04-28 Dic Corp 遮光性粘着剤組成物及び遮光性粘着テープ
WO2013191106A1 (fr) * 2012-06-21 2013-12-27 Dic株式会社 Ruban adhésif

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CN106536664A (zh) 2017-03-22
JP6341889B2 (ja) 2018-06-13

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