WO2015046047A1 - ハードコートフィルム及び表面部材付き表示素子 - Google Patents

ハードコートフィルム及び表面部材付き表示素子 Download PDF

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Publication number
WO2015046047A1
WO2015046047A1 PCT/JP2014/074819 JP2014074819W WO2015046047A1 WO 2015046047 A1 WO2015046047 A1 WO 2015046047A1 JP 2014074819 W JP2014074819 W JP 2014074819W WO 2015046047 A1 WO2015046047 A1 WO 2015046047A1
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Prior art keywords
weight
resin
surface member
display element
hard coat
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PCT/JP2014/074819
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English (en)
French (fr)
Japanese (ja)
Inventor
柴田　寛
伸良 福井
克彦 細越
隆之 倉科
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株式会社きもと
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Application filed by 株式会社きもと filed Critical 株式会社きもと
Priority to CN201480050495.7A priority Critical patent/CN105531606B/zh
Priority to JP2015539161A priority patent/JP6521524B2/ja
Priority to KR1020167010148A priority patent/KR102225360B1/ko
Publication of WO2015046047A1 publication Critical patent/WO2015046047A1/ja

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings

Definitions

  • the present invention includes a hard coat film such as a display element front film suitable for use on a surface member or the like disposed on the screen of various display elements, and a surface member on which the surface member including the film is disposed on the screen.
  • the present invention relates to a display element.
  • An antiglare film may be disposed on the screen of various display elements (liquid crystal display elements, plasma display elements, etc.).
  • the surface of the antiglare film is subjected to surface unevenness treatment, and the surface of the antiglare film is formed by providing a hard coat layer containing particles as a matting agent on the substrate as an antiglare layer. Can be applied.
  • a matting agent is necessary for developing antiglare properties and Newton ring preventing properties.
  • sparkle is generated by a lens formed around the matting agent, and antiglare properties or Newtonian properties are generated. It was difficult to satisfy both the ring prevention property and the sparkle prevention property at the same time.
  • Patent Document 1 a technique for adding a resin component other than the ionizing radiation curable resin to the Newton ring prevention layer (Patent Document 1), a technique for increasing the coefficient of variation of the particle size distribution of the matting agent in the Newton ring prevention layer (Patent Document) 2) has been proposed, but there is a need for a technique capable of further preventing the occurrence of sparkle for color display elements that have been further refined in recent years. From the viewpoint of preventing scratches, it is desirable that the coating film hardness is as high as possible.
  • a technology capable of simultaneously satisfying both antiglare properties, Newton ring prevention properties, and sparkle prevention properties, and can increase coating film hardness.
  • the present inventors include a specific resin component (one or more of a thermoplastic resin and a thermosetting resin into which a reactive functional group is introduced) in a composition containing a matting agent and an ionizing radiation curable resin, In the process of curing the composition, the flow of the ionizing radiation curable resin is further suppressed. As a result, it was found that the occurrence of undulation of the resin after curing was further suppressed, and thereby it was possible to prevent the occurrence of sparkle more effectively, and the coating film hardness could be increased, thereby completing the present invention. It was.
  • a specific resin component one or more of a thermoplastic resin and a thermosetting resin into which a reactive functional group is introduced
  • the hard coat film of this invention can be utilized for the use arrange
  • the hard coat film which concerns on the 1st viewpoint of this invention is comprised with the hardened
  • the curable composition further includes one or more of the following (a) and (b) as a resin component: Content ratio in total resin content is ionizing radiation curable resin: 50% by weight or more and less than 85% by weight, and the following (a) and (b): more than 15% by weight and 50% by weight or less .
  • the hard coat film which concerns on the 2nd viewpoint of this invention is comprised by the hardened
  • the curable composition further includes one or more of the following (a) and (b) as a resin component: The aspect ratio of the convex part is adjusted to 0.043 or more.
  • the display element with a surface member according to the first aspect of the present invention is characterized in that the surface member is disposed on the display element, and the surface member includes the hard coat film of the present invention in at least a part thereof. .
  • the surface member is arranged on the display element, and the surface member is used as an optical functional layer as at least one of an antiglare layer and a Newton ring prevention layer. It is characterized by comprising the hard coat film of the present invention.
  • the curable composition of the present invention is used to form an optical functional layer that exhibits at least one optical function of an antiglare effect and suppression of occurrence of interference fringes, Contains resin and matting agent
  • the resin component includes an ionizing radiation curable resin and one or more of the following (a) and (b): Content ratio in total resin content is ionizing radiation curable resin: 50% by weight or more and less than 85% by weight, and the following (a) and (b): more than 15% by weight and 50% by weight or less .
  • the reactive functional group introduced into the compound is preferably a photocurable unsaturated group.
  • the matting agent can be constituted with an average particle size of 0.1 to 10 ⁇ m.
  • the matting agent may be composed of a single matting agent having a predetermined average particle diameter, but it is preferable to use a combination of a plurality of matting agents having different average particle diameters.
  • at least a first matting agent having an average particle size of 0.1 to 4.0 ⁇ m and a second matting agent having an average particle size of 3.0 to 10.0 ⁇ m can be included.
  • the matting agent can be used in combination of only the first matting agent and the second matting agent. In this case, those having a variation coefficient of the particle size distribution of 15% or less can be used.
  • the weight ratio of the first matting agent to the second matting agent in all matting agents to be contained is 8: 2 to 6: 4 regardless of whether or not the third and subsequent matting agents are contained. be able to. Regardless of whether the use of the matting agent is single or plural, the matting agent as a whole can be contained in the range of 0.05 to 5 parts by weight with respect to 100 parts by weight of the resin.
  • the optical functional layer can be used as an antiglare layer that exhibits an antiglare effect or a Newton ring prevention layer that suppresses the generation of interference fringes.
  • a (meth) acryloyl group can be used as a reactive functional group of at least one of the thermoplastic resin (a) and the thermosetting resin (b). .
  • a hard coat film can be utilized for the use arrange
  • the aspect ratio of the plurality of convex portions arranged on the surface of the optical functional layer due to the matting agent is preferably adjusted to 0.043 or more.
  • the hard coat film of the present invention using the optical functional layer as an antiglare layer can be included on the surface side of the surface member.
  • the hard coat film of this invention which utilized the optical function layer as a Newton ring prevention layer can be included in the back surface side of a surface member.
  • a surface member can be comprised with a protective plate, a touch panel, or a polarizing film.
  • the surface member can be formed of a protective plate, a touch panel, or a polarizing film.
  • the surface member is arranged on the display element, the surface member is a touch panel, and the outermost surface member of the touch panel uses the optical functional layer as an antiglare layer. It can be comprised with the hard coat film of invention.
  • the surface member is disposed on the display element, the surface member is a touch panel, and at least one of the outermost surface member, the intermediate member, and the rearmost member of the touch panel, It can be comprised with the hard coat film of this invention using the optical function layer as a Newton ring prevention layer.
  • the composition containing the matting agent and the ionizing radiation curable resin that forms the optical functional layer contains a specific resin component (one or more of Compound A1 and Compound A2 described below). Further, the occurrence of undulation of the resin after curing is further suppressed. As a result, the resulting coating film can satisfy both the antiglare property, the Newton ring prevention property, and the sparkle prevention property at the same time.
  • the reactive functional group is introduced into the specific resin component, the bond with the ionizing radiation curable resin is strengthened. As a result, the coating film hardness can be further increased as compared with the case where the reactive functional group is not introduced.
  • a coating film (optical functional layer) having both the antiglare property, the Newton ring prevention property and the sparkle prevention property at the same time and having an enhanced coating film hardness is obtained.
  • the hard coat film and the display element with a surface member of the present invention have an optical functional layer composed of a cured product of the curable composition of the present invention, both antiglare and Newton ring preventive properties and sparkle preventive properties are provided. Is satisfied at the same time, and the coating film hardness is increased.
  • FIG. 1 is a cross-sectional view showing a display element front film as an example of the present invention.
  • FIG. 2 is a cross-sectional view showing an example of a conventional display element front film.
  • FIG. 3 is a cross-sectional view showing an example of the display element with a surface member of the present invention.
  • FIG. 4 is a sectional view showing another example of the display element with a surface member of the present invention.
  • FIG. 5 is a cross-sectional view showing another example of the display element with a surface member of the present invention.
  • FIG. 6 is a cross-sectional view showing another example of the display element with a surface member of the present invention.
  • SYMBOLS 1 Display element front film (hard coat film), 11 ... Transparent base material, 12 ... Optical functional layer, 121 ... Resin component (binder), 122 ... Matting agent, 2 ... Surface member, 2a ... Protection plate, 2b ... Touch panel, 2c ... polarizing plate, 3 ... display element, 4, 4a, 4b, 4c ... display element with surface member.
  • the hard coat film of this invention is used as a film for display element front surfaces arrange
  • an optical functional layer 12 is laminated on a transparent substrate 11.
  • the transparent substrate 11 examples include a transparent film formed of a material such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyethylene, polypropylene, polystyrene, triacetyl cellulose, and acrylic.
  • a polyethylene terephthalate film that has been stretched, in particular biaxially stretched, is preferred because of its excellent mechanical strength and dimensional stability.
  • the thickness of the transparent substrate 11 is generally 6 to 500 ⁇ m, preferably 23 to 200 ⁇ m.
  • optical functional layer 12 examples include an antiglare layer that exhibits an antiglare effect and a Newton ring prevention layer that suppresses the occurrence of interference fringes (Newton rings).
  • the optical functional layer 12 includes a resin component 121 and a matting agent 122, and is composed of a cured product of a curable composition (curable resin precursor), and includes a plurality of convex portions due to the matting agent 122 on the surface. Become.
  • the curable composition of this example contains a resin component and a matting agent.
  • the resin component referred to in this example includes a curable resin and a thermoplastic resin.
  • the cured product in this example refers to curing of a polymerization initiator, a polymerization accelerator (such as an ultraviolet sensitizer), and a curing agent necessary for curing the curable resin together with a curable resin as a curing main agent. It is used in the concept including auxiliary agents.
  • the resin component in this example includes at least an ionizing radiation curable resin.
  • the ionizing radiation curable resin those that are cross-linked and cured by irradiation with ionizing radiation (ultraviolet rays or electron beams) are used.
  • ionizing radiation ultraviolet rays or electron beams
  • photocationically polymerizable resin examples include epoxy resins such as bisphenol epoxy resins, novolac epoxy resins, alicyclic epoxy resins, and aliphatic epoxy resins, and vinyl ether resins.
  • an acrylic prepolymer having two or more acryloyl groups in one molecule and having a three-dimensional network structure by crosslinking and curing is particularly preferably used.
  • the acrylic prepolymer urethane acrylate, polyester acrylate, epoxy acrylate, melamine acrylate, polyfluoroalkyl acrylate, silicone acrylate and the like can be used.
  • these acrylic prepolymers can be used alone, but it is preferable to add a photopolymerizable monomer in order to improve the cross-linking curability and further improve the hardness of the functional layer.
  • photopolymerizable monomers examples include monofunctional acrylic monomers such as 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, and butoxyethyl acrylate, 1,6-hexanediol diacrylate, neopentyl glycol diacrylate, and diethylene glycol.
  • bifunctional acrylic monomer such as diacrylate, polyethylene glycol diacrylate, hydroxypivalate ester neopentyl glycol diacrylate, etc.
  • polyfunctional acrylic monomer such as dipentaerythritol hexaacrylate, trimethylpropane triacrylate, pentaerythritol triacrylate, or the like Two or more are used.
  • the ionizing radiation curable resin is a curing aid such as a photopolymerization initiator or an ultraviolet sensitizer when cured by ultraviolet irradiation. It is preferable to contain an agent.
  • Photopolymerization initiators include photo-radical polymerization initiators such as acetophenones, benzophenones, Michler's ketone, benzoin, benzylmethyl ketal, benzoylbenzoate, ⁇ -acyloxime esters, thioxanthones, onium salts, sulfonate esters, organometallics
  • photocationic polymerization initiators such as complexes.
  • the ultraviolet sensitizer include n-butylamine, triethylamine, and tri-n-butylphosphine.
  • the photopolymerization accelerator can reduce the polymerization obstacle due to air at the time of curing and increase the curing speed.
  • examples thereof include p-dimethylaminobenzoic acid isoamyl ester and p-dimethylaminobenzoic acid ethyl ester. Can be mentioned.
  • an ionizing radiation curable organic-inorganic hybrid resin may be used as the ionizing radiation curable resin.
  • ionizing radiation curable organic-inorganic hybrid resins are organic and inorganic. The mixture is intimately mixed, and the dispersion state is at or close to the molecular level. By irradiation with ionizing radiation, the inorganic component and the organic component react to form a film.
  • Examples of the inorganic component in the organic-inorganic hybrid resin include metal oxides such as silica and titania, and silica is preferable.
  • Examples of the silica include reactive silica in which a photosensitive group having photopolymerization reactivity is introduced on the surface.
  • the content of the inorganic component in the organic-inorganic hybrid resin is preferably 10% by weight or more, more preferably 20% by weight, preferably 65% by weight or less, more preferably 40% by weight or less.
  • the organic component in the organic-inorganic hybrid resin is a compound having a polymerizable unsaturated group polymerizable with the inorganic component (preferably reactive silica) (for example, having two or more polymerizable unsaturated groups in the molecule). And polyunsaturated organic compounds or unit price unsaturated organic compounds having one polymerizable unsaturated group in the molecule).
  • one or more specific compounds A1 and A2 are contained in the curable composition together with the ionizing radiation curable resin described above.
  • Ionizing radiation curable resin has the property of curing while flowing during the curing process. Therefore, when trying to obtain a cured product using a curable composition containing a matting agent and an ionizing radiation curable resin, the ionizing radiation curable resin flows during curing of the curable composition, As shown in FIG. 2, “swell 121 a ′” of the resin portion 121 a centering on the matting agent 122 a is generated and a lens shape is formed. Due to this, sparkle is generated in the conventional film 1a having the optical function layer 12a including the matting agent 122a and the resin component 121a.
  • a specific amount of one or more of compound A1 and compound A2 is included, thereby further suppressing the flow of the ionizing radiation curable resin during the curing process.
  • the occurrence of “swell” of the resin portion 121 after curing is further suppressed (what substantially corresponds to the swell 121 a ′ in FIG. 2 is not seen. The same applies hereinafter).
  • the occurrence of sparkles in the optical functional layer 12 after curing can be more effectively prevented.
  • thermoplastic resins include polyester resins, acrylic resins, polycarbonate resins, cellulose resins, acetal resins, vinyl resins, polyethylene resins, polystyrene resins, polypropylene resins, polyamide resins, and polyimide resins. Examples thereof include resins and fluorine resins.
  • thermosetting resin include polyester acrylate resins, polyurethane acrylate resins, epoxy acrylate resins, epoxy resins, melamine resins, phenol resins, and silicone resins.
  • a photocurable unsaturated group is preferably used, and preferably an ionizing radiation curable unsaturated group.
  • an ethylenically unsaturated bond such as a (meth) acryloyl group, a styryl group, a vinyl group and an allyl group, and an epoxy group. More preferred is a (meth) acryloyl group.
  • a compound having a glass transition temperature (Tg) of 45 ° C. or higher, preferably 80 ° C. or higher, more preferably 90 ° C. or higher is used as compound A1 and / or compound A2.
  • Tg glass transition temperature
  • the compound A1 and / or the compound A2 having a Tg of 45 ° C. or more together with the ionizing radiation curable resin it is possible to easily suppress the flow of the ionizing radiation curable resin during the curing process.
  • Tg of compound A2 in this example is that before curing.
  • compound A1 and / or compound A2 those having a weight average molecular weight (Mw) of 70,000 or more, preferably 80,000 or more are used.
  • Mw weight average molecular weight
  • one or more of the following (a) and (b) are included together with the ionizing radiation curable resin.
  • the value of the weight average molecular weight (Mw) is obtained by measuring the molecular weight distribution of the compound by a gel permeation chromatograph (GPC) equipped with a differential refractive index detector (RID), for example. Chart) can be calculated using standard polystyrene as a calibration curve.
  • GPC gel permeation chromatograph
  • RID differential refractive index detector
  • the weight ratio between the ionizing radiation curable resin and the compound A1 and / or the compound A2 is preferably 50% by weight to less than 85% by weight of the former, more than 15% by weight and 50% by weight or less of the latter. More preferably, the former is 60% to 80% by weight, the latter is 20% to 40% by weight, more preferably the former is 60% to 75% by weight, and the latter is 25% to 40% by weight. And By setting the compound A1 and / or the compound A2 to an amount exceeding 15% by weight, the occurrence of swell can be sufficiently suppressed and sparkle can be easily prevented. By making compound A1 and / or compound A2 50 weight% or less, it can be made easy to prevent the coating-film intensity fall by containing compound A1 and / or compound A2 more than necessary.
  • the dispersibility of the matting agent is improved, thereby appropriately adjusting the surface properties of the coating film.
  • the aspect ratio of the convex portion due to the matting agent formed on the coating film surface is adjusted to a range of 0.043 or more.
  • the aspect ratio of the convex part is out of this range, the effect of preventing sparkle due to suppression of the occurrence of waviness while maintaining the coating film strength cannot be obtained.
  • the “aspect ratio of the convex portion” is preferably 0.2 or less, more preferably 0.18 or less, and still more preferably 0.8 or less, from the viewpoint of preventing the matting agent from falling off the coating film surface. 16 or less.
  • the “aspect ratio of the convex portion” means the ratio (H / L) of the height H of the convex portion to the base length L (both see FIG. 2).
  • the “convex portion” means a portion where the matting agent 122 protrudes on the surface of the coating film (optical functional layer 12a), and the height (height of the projecting portion) H is a coating where the matting agent 122 does not exist. It means the shortest distance ( ⁇ m) between the tangent line drawn on the smooth part of the film and the tangent line drawn on the upper end part of the convex part.
  • “Span” means the bottom surface of a circular area with a gradient of 0.1 ⁇ m in height, which is a portion of the coating film that touches the periphery of the convex portion when viewed in plan, and its length (base length) L means the diameter ( ⁇ m) of the bottom surface of the circular region.
  • the height H of the convex portion is preferably 0.3 ⁇ m or more, more preferably 0.4 ⁇ m or more in consideration of Newton ring prevention.
  • the thickness is preferably 8 ⁇ m or less, more preferably 6 ⁇ m or less.
  • the skirt length L is preferably 80 ⁇ m or less, more preferably 60 ⁇ m or less, still more preferably 40 ⁇ m or less, and most preferably 37 ⁇ m or less in consideration of sparkle prevention.
  • the thickness is preferably 3 ⁇ m or more, more preferably 4 ⁇ m or more.
  • the height H and skirt length L of the convex portion can be obtained from the cross-sectional shape of the coating film photographed using, for example, a confocal laser microscope (VK-9710, manufactured by Keyence Corporation). Moreover, it can also obtain
  • a confocal microscope an interference microscope
  • AFM atomic force microscope
  • Matting agents include inorganic particles (eg, calcium carbonate, magnesium carbonate, barium sulfate, aluminum hydroxide, silica, kaolin, clay, talc, etc.) and resin particles (eg, acrylic resin particles, polystyrene resin particles, polyurethane resin particles). Polyethylene resin particles, benzoguanamine resin particles, epoxy resin particles, etc.). Among these, spherical fine particles are preferable from the viewpoint of handleability and ease of control of the surface shape. Moreover, the resin particles are suitable in that they easily bring the difference in refractive index from that of the resin, easily prevent the occurrence of sparkle, and are difficult to hinder transparency.
  • inorganic particles eg, calcium carbonate, magnesium carbonate, barium sulfate, aluminum hydroxide, silica, kaolin, clay, talc, etc.
  • resin particles eg, acrylic resin particles, polystyrene resin particles, polyurethane resin particles.
  • the average particle diameter of the matting agent varies depending on the thickness of the optical functional layer 12, it cannot be generally stated, but is preferably 0.1 ⁇ m or more, more preferably 1 ⁇ m or more, preferably 10 ⁇ m or less, more preferably 8 ⁇ m or less. And By making the average particle size of the matting agent 10 ⁇ m or less, induction of sparkle can be easily prevented, and by making the average particle size 0.1 ⁇ m or more, antiglare property and Newton ring prevention property can be easily developed.
  • the matting agent of this example is preferably composed of a combination of a plurality of matting agents having different average particle diameters.
  • the average particle size is preferably 0.1 ⁇ m or more, more preferably 0.5 ⁇ m or more, further preferably 2.5 ⁇ m or more, preferably 4.0 ⁇ m or less, more preferably 3.5 ⁇ m or less.
  • the average particle diameter of the first matting agent is preferably 3.0 ⁇ m or more, more preferably 4.0 ⁇ m or more, preferably 10.0 ⁇ m or less, more preferably 7.0 ⁇ m or less, and even more preferably 6 It is more preferable to include at least a second matting agent of 0.0 ⁇ m or less.
  • a matting agent of this example when only two types (the first matting agent and the second matting agent) described above are used in combination (not containing the third and subsequent matting agents other than these two types), in addition, it is preferable to use particles having a variation coefficient of particle size distribution of 15% or less, preferably 10% or less (so-called monodisperse particles).
  • a particle having a particle diameter distribution coefficient of variation of 15% or less is used, causing a large local convex portion. Easy to prevent sparkle.
  • the coefficient of variation (CV value: coefficient of variation) is a value indicating the dispersion state of the particle size distribution, and the standard deviation of the particle size distribution (the square root of unbiased dispersion) is the arithmetic average value of the particle size (average particle size) It is the percentage of the value divided by (diameter). That is, it shows how much the spread of particle size distribution (variation of particle size) is relative to the average value (arithmetic average diameter).
  • CV value (no unit) (standard deviation / average) Value). The smaller the CV value, the narrower the particle size distribution (sharp), and the larger the CV value, the wider the particle size distribution (broad).
  • the content of the matting agent is preferably 0.05 parts by weight or more, more preferably 0.1 parts by weight or more, preferably 5 parts by weight or less, more preferably 3 parts by weight with respect to 100 parts by weight of the resin content. Part or less, more preferably 1 part by weight or less.
  • first mat these two types are also included, including the case where a third or subsequent mat agent other than the above-described two types (first mat agent, second mat agent) is contained.
  • the weight ratio of the first matting agent to the second matting agent in all matting agents is preferably 8: 2 to 6: 4.
  • the “average particle size” and “coefficient of variation in particle size distribution” of the matting agent in this example are values measured by a Coulter counter method.
  • the Coulter counter method is a method of electrically measuring the number and size of matting agent particles dispersed in a solution, in which particles are dispersed in an electrolyte and electricity flows using suction force. This is a method of measuring a voltage pulse proportional to the volume of a particle by replacing the electrolyte by the volume of the particle when passing the particle through the pores, increasing the resistance. Therefore, by measuring the height and number of the voltage pulses electrically, the number of particles and the individual particle volume are measured, and the particle size and particle size distribution are obtained.
  • additives such as a leveling agent, an ultraviolet absorber and an antioxidant may be added.
  • the optical functional layer 12 can be formed by applying the above-described curable composition of the present example to the transparent substrate 11 by curing it by applying, drying and irradiating with ionizing radiation.
  • the optical functional layer 12 has a surface hardness that does not cause damage even when steel wool # 0000 with a load of 200 g / 2 cm 2 is reciprocated five times (preferably 10 times) or more.
  • the number of reciprocations by the steel wool # 0000 on the surface of the optical functional layer 12 is 10 times. It can be more than once.
  • the thickness of the optical function layer 12 is preferably 0.5 ⁇ m or more, more preferably 1 ⁇ m or more, preferably 10 ⁇ m or less, more preferably 5 ⁇ m or less, and particularly preferably 3 ⁇ m or less.
  • the display element front film 1 of this example has a total light transmittance (JIS K7361-1: 1997) of 85% or more and a haze (JIS K7136: 2000) of 10% or less. preferable.
  • the usage application of the hard coat film of the present invention is not limited to the above-described front surface of the display element.
  • it can be used for other applications such as a transparent electrode film, an anti-scattering film (for example, a configuration in which an adhesive layer is provided on the surface opposite to the optical functional layer 12 of the transparent base material 11), and a printing film.
  • the display element 4 (4a, 4b, 4c) with the surface member of this example is configured by disposing the surface member 2 (2a, 2b, 2c) on the display element 3. ing.
  • the display element 3 include a liquid crystal display element, a CRT display element, a plasma display element, and an EL display element.
  • the surface member 2 include a protective plate 2a, a touch panel 2b, and a polarizing plate 2c.
  • the display element front film 1 of this example is included in at least a part of these surface members 2 (2a, 2b, 2c).
  • the protective plate 2a as an example can be constituted by, for example, a transparent resin plate represented by an acrylic resin plate.
  • the thickness of the protective plate 2a is usually about 0.1 to 2.0 mm.
  • the method of the touch panel 2b as an example is not particularly limited, and can be configured by, for example, a resistive touch panel, a capacitive touch panel, or the like.
  • the display element-attached film 1 is laminated on the surface side of the protective plate 2a as a glare-proof film.
  • the element 4a may be configured.
  • the display element 4a with a surface member can also be configured by laminating the display element front film 1 of this example as a Newton ring prevention film on the back side of the protective plate 2a.
  • the display element front film 1 itself of this example may be provided on the display element 3 as a protective plate 2 a having antiglare properties and / or Newton ring preventing properties.
  • the display element 4b with a surface member is laminated
  • the display element-attached display element 4b can be configured by laminating the display element front film 1 of this example as a Newton ring prevention film on the back side of the touch panel 2b.
  • the display element-attached display element 4b can be configured by using the display element front film 1 itself of this example as a Newton ring prevention film as a member on the outermost surface, middle, or rearmost surface of the touch panel 2b. .
  • the surface member 2 is the polarizing film 2c, as shown in FIG. 3, a display with a surface member is provided by bonding the film 1 for a display element front surface of this example as an antiglare film on the surface side of the polarizing film 2c.
  • the element 4c can be configured.
  • the predetermined function (prevention) Sparkling can be prevented and coating film hardness is increased while providing dazzling properties, Newton's ring prevention properties, and the like.
  • Example 1 On one side of a 125 ⁇ m thick transparent polyester film (Cosmo Shine A4350: Toyobo Co., Ltd.), a coating liquid a having the following formulation was applied, dried and irradiated with ultraviolet rays to form an optical functional layer having a thickness of 3 ⁇ m. A hard coat film was obtained. In addition, the weight conversion amount of solid content is shown in parentheses.
  • Example 2 A hard coat film of this example was obtained in the same manner as in Example 1 except that the addition amount of the resin A in the coating liquid a was changed to 65 parts (solid content 26 parts).
  • Example 3 A hard coat film of this example was obtained in the same manner as in Example 1 except that the addition amount of the resin A in the coating liquid a was changed to 250 parts (solid content: 100 parts).
  • Example 4 A hard coat film of this example was obtained in the same manner as in Example 1 except that the resin A of the coating liquid a was changed to the resin B and the addition amount was changed to 95 parts (solid content 42.75 parts). .
  • Example 5 A hard coat film of this example was obtained in the same manner as in Example 1 except that the matting agent A of the coating liquid a was changed to the matting agent B.
  • Example 6 A hard coat film of this example was obtained in the same manner as in Example 1 except that the resin A of the coating liquid a was changed to the resin C.
  • Example 7 A hard coat film of this example was obtained in the same manner as in Example 1 except that the matting agent A of the coating liquid a was changed to the matting agent C.
  • Example 8 The amount of resin A added to coating solution a was changed to 97.2 parts (solid content 38.9 parts). Further, a hard coat film of this example was obtained in the same manner as in Example 1 except that the matting agent A of the coating liquid a was changed to the matting agent E and the addition amount thereof was changed to 0.14 part.
  • Example 9 The addition amount of the resin A in the coating solution a was changed to 250 parts (solid content 100 parts), and the addition amount of the ionizing radiation curable resin was changed to 48.75 parts (solid content 39 parts). Further, a hard coat film of this example was obtained in the same manner as in Example 1 except that the matting agent A of the coating liquid a was changed to the matting agent E and the addition amount thereof was changed to 0.14 part.
  • Example 10 The addition amount of the resin A in the coating liquid a was changed to 47.6 parts (solid content 19.0 parts), and the addition amount of the ionizing radiation curable resin was changed to 256 parts (solid content 204.75 parts). Further, a hard coat film of this example was obtained in the same manner as in Example 1 except that the matting agent A of the coating liquid a was changed to the matting agent D and the addition amount thereof was changed to 0.14 part.
  • Example 11 The amount of resin A added to coating solution a was changed to 97.2 parts (solid content 38.9 parts). Further, a hard coat film of this example was obtained in the same manner as in Example 1 except that the matting agent A of the coating liquid a was changed to the matting agent D and the addition amount thereof was changed to 0.14 part.
  • Example 12 The addition amount of the resin A in the coating liquid a was changed to 196.4 parts (solid content 78.6 parts), and the addition amount of the ionizing radiation curable resin was changed to 62 parts (solid content 50 parts). Further, a hard coat film of this example was obtained in the same manner as in Example 1 except that the matting agent A of the coating liquid a was changed to the matting agent D and the addition amount thereof was changed to 0.14 part.
  • Example 13 The addition amount of the resin A in the coating solution a was changed to 250 parts (solid content 100 parts), and the addition amount of the ionizing radiation curable resin was changed to 48.75 parts (solid content 39 parts). Further, a hard coat film of this example was obtained in the same manner as in Example 1 except that the matting agent A of the coating liquid a was changed to the matting agent D and the addition amount thereof was changed to 0.14 part.
  • Example 14 Example 1 was repeated except that the amount of resin A added to coating solution a was changed to 97.2 parts (solid content 38.9 parts) and the amount of matting agent A was changed to 0.14 parts. Thus, a hard coat film of this example was obtained.
  • Example 15 The addition amount of the resin A in the coating solution a was changed to 250 parts (solid content 100 parts), and the addition amount of the ionizing radiation curable resin was changed to 48.75 parts (solid content 39 parts). Further, a hard coat film of this example was obtained in the same manner as in Example 1 except that the addition amount of the matting agent A in the coating liquid a was changed to 0.14 part.
  • Example 16 A part (0.07 part) of the matting agent D (average particle size 3 ⁇ m, variation coefficient 9%) of the coating liquid a was replaced with the matting agent E (average particle size 1.8 ⁇ m, variation coefficient 9%). That is, except that the matting agent D (addition amount is 0.14 part) of the coating liquid a is changed to two kinds of matting agent D and matting agent E (addition amount is 0.07 part each) having different average particle diameters. Produced the hard coat film of this example in the same manner as in Example 11 (resin A content: 28%).
  • Example 17 A part (0.07 part) of the matting agent D (average particle diameter 3 ⁇ m, variation coefficient 9%) of the coating liquid a was replaced with the matting agent A (average particle diameter 5 ⁇ m, variation coefficient 9%). That is, except that the matting agent D (addition amount is 0.14 part) of the coating liquid a is changed to two types of matting agent A and matting agent D (addition amount is 0.07 part each) having different average particle diameters.
  • the hard coat film of this example in the same manner as in Example 11 (resin A content: 28%).
  • Example 1 A hard coat film of this example was obtained in the same manner as in Example 1 except that the resin A of the coating liquid a was changed to the resin D and the addition amount was changed to 95 parts (solid content 42.5 parts). .
  • Example 2 A hard coat film of this example was obtained in the same manner as in Example 1 except that the resin A of the coating liquid a was changed to the resin E and the addition amount was changed to 95 parts (solid content 42.75 parts). .
  • Example 3 A hard coat film of this example was obtained in the same manner as in Example 1 except that the amount of the resin A added to the coating solution a was changed to 40 parts (solid content 16 parts).
  • Example 4 A hard coat film of this example was obtained in the same manner as in Example 1 except that the amount of the resin A added to the coating liquid a was changed to 300 parts (120 parts solids).
  • Table 1 summarizes information such as the types (A to E) and content ratios of resins used in each example, and the types (A to E) and addition amounts of matting agents used in each example.
  • Example 7 the ratio of the ionizing radiation curable resin and the resin A or C corresponding to the compound A2 in the coating solution is in the optimum range, and in Example 4, it is also in the optimum range.
  • the blended resin A or C has a higher glass transition temperature.
  • sparkle prevention properties ⁇
  • Example 7 the same resin content as in Examples 1, 5, and 6 was used in the same amount.
  • a matting agent having a coefficient of variation of particle distribution exceeding 15% was used. Used alone. Therefore, although slightly inferior in anti-sparkle properties as compared with other Examples 1 to 6, the anti-sparkle property level was sufficiently excellent.
  • Examples 10 to 13 as compared with Examples 1 to 7, a matting agent having a small average particle diameter was used alone, and the addition amount was reduced to 20%.
  • Examples 8 and 9 as compared with Examples 1 to 7, a matting agent having a smaller average particle diameter than that of Examples 10 to 13 was used alone, and the addition amount was reduced to 20%.
  • the addition amount of the matting agent was reduced to 20% as compared with Examples 1 to 7.
  • Examples 16 and 17 unlike Examples 1 to 15, two matting agents having different average particle diameters are used in combination, and compared to Examples 1 to 7, mats are similar to Examples 8 to 15. The amount of agent added was reduced to 20%.
  • the content ratio of Resin A, B, or C was appropriate as in Examples 1 to 7. Therefore, it was confirmed that excellent results were obtained in the same manner as in Examples 1, 5, and 6, that is, the obtained hard coat films were extremely excellent in sparkle prevention ( ⁇ ).
  • Comparative Example 1 the weight ratio of the ionizing radiation curable resin and the resin D in the coating solution is within the range of the present invention, but the glass transition temperature of the used resin D is low and the weight average molecular weight is also low. Is small. Therefore, the obtained hard coat film could not prevent sparkle.
  • Comparative Example 1 no reactive functional group is introduced into the resin D used. Therefore, the obtained hard coat film was inferior in surface hardness.
  • Comparative Example 2 the weight ratio of the ionizing radiation curable resin to the resin E in the coating solution, the glass transition temperature of the resin E used, and the weight average molecular weight are all within the scope of the present invention. A reactive functional group is not introduced into E. Therefore, although the obtained hard coat film could prevent sparkle, the surface hardness was inferior.
  • Comparative Example 7 the resin A was included in the coating solution, but the weight ratio between the resin A and the ionizing radiation curable resin was outside the scope of the present invention. Therefore, the obtained hard coat film could not prevent sparkle as in Comparative Examples 3 and 4.
  • Comparative Example 7 compared with Comparative Example 3, a matting agent having a small average particle diameter was used, and the amount added was reduced to 20%. Therefore, the obtained hard coat film had an increased surface hardness as compared with Comparative Example 3.

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PCT/JP2014/074819 2013-09-25 2014-09-19 ハードコートフィルム及び表面部材付き表示素子 WO2015046047A1 (ja)

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CN201480050495.7A CN105531606B (zh) 2013-09-25 2014-09-19 硬涂膜及附表面构件的显示元件
JP2015539161A JP6521524B2 (ja) 2013-09-25 2014-09-19 ハードコートフィルム及び表面部材付き表示素子
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WO2021200884A1 (ja) * 2020-03-31 2021-10-07 大日本印刷株式会社 光学積層体、並びに、これを備える偏光板、表面板及び画像表示装置

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CN109971321B (zh) * 2019-03-30 2022-08-23 上海航永光电新材料有限公司 一种淋涂专用的哑光涂料组合物
CN111580191A (zh) * 2020-05-09 2020-08-25 惠州市华星光电技术有限公司 表面处理方法、抗眩光涂层及显示装置
CN112612155A (zh) * 2020-11-18 2021-04-06 安徽鸿程光电有限公司 一种安装显示面板的方法和显示装置

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JP6521524B2 (ja) 2019-05-29

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