WO2021131822A1 - Stratifié, et article - Google Patents

Stratifié, et article Download PDF

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Publication number
WO2021131822A1
WO2021131822A1 PCT/JP2020/046429 JP2020046429W WO2021131822A1 WO 2021131822 A1 WO2021131822 A1 WO 2021131822A1 JP 2020046429 W JP2020046429 W JP 2020046429W WO 2021131822 A1 WO2021131822 A1 WO 2021131822A1
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WIPO (PCT)
Prior art keywords
layer
polarizing
coating film
laminate
polarizing layer
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PCT/JP2020/046429
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English (en)
Japanese (ja)
Inventor
健吾 富岡
千博 加藤
茉友 椎名
環 川元
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日本ペイントホールディングス株式会社
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Publication of WO2021131822A1 publication Critical patent/WO2021131822A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to a laminate and an article.
  • the paint is, for example, a material that imparts design to the object on which the paint is applied, imparts protection from the external environment, and imparts functions such as heat shielding.
  • Majora (registered trademark) paint manufactured by Nippon Paint Co., Ltd. is a paint that imparts high design to objects such as cars.
  • This Majora paint contains a chroma flare pigment.
  • This chromaflare pigment has a five-layer structure, so that about 50% of the incident light is reflected by the surface layer and the remaining about 50% is reflected by the central Opaque Reflector Metal. It is set. Due to this spectral effect, interference wavelengths are generated, and the color changes depending on the viewing angle of the object, and the Majora paint expresses high design.
  • a multilayer reflective film including at least one reflective layer and at least one circularly polarizing layer has been proposed (for example, Patent Document 1).
  • chromaflare pigments and Majora paints containing those pigments have the disadvantage of being extremely expensive.
  • an object of the present invention is to provide a laminate that is cheaper and can impart a high degree of design to an object.
  • Another object of the present invention is to provide an article having a high degree of design.
  • the laminated body according to the present invention is a laminated body, and is In order, Polarizing layer and Including the coating film layer
  • the coating film layer is a laminated body having birefringence. As a result, it is possible to give the object a high degree of design at a lower cost.
  • the laminates in order, With the polarizing layer (first polarizing layer), With the coating film layer Includes a reflective layer or a second polarizing layer.
  • the coating film layer contains a birefringent material in the polymer matrix.
  • One embodiment of the laminate according to the present invention is a laminate for imparting design.
  • the article according to the present invention is an article having any of the above laminates. Thereby, it is possible to provide an article having a high design property.
  • the present invention it is possible to provide a laminate that is cheaper and can impart a high degree of design to an object. According to the present invention, it is possible to provide an article having a high degree of design.
  • FIG. 1 is a schematic view showing a cross section of an example of a laminated body according to the present invention.
  • FIG. 2 is a schematic view showing a cross section of an example of a coating film layer of the laminate of the present invention.
  • FIG. 3 is a schematic view showing a cross section of another example of the coating film layer of the laminate of the present invention.
  • FIG. 4 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • FIG. 5 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • FIG. 6 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • FIG. 1 is a schematic view showing a cross section of an example of a laminated body according to the present invention.
  • FIG. 2 is a schematic view showing a cross section of an example of a coating film layer of the laminate of the present invention.
  • FIG. 3 is a schematic view showing a cross
  • FIG. 7 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • FIG. 8 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • FIG. 9 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • the paint and the paint composition can be used interchangeably.
  • visible light refers to an electromagnetic wave having a wavelength in the range of 380 to 780 nm.
  • transmission and passage can be used interchangeably.
  • 380 to 780 nm means 380 nm or more and 780 nm or less.
  • the laminated body according to the present invention is a laminated body, and is In order, Polarizing layer and Including the coating film layer
  • the coating film layer is a laminated body having birefringence.
  • the mechanism by which the laminate exhibits high designability is as follows. That's right. (1) Two laminated bodies of the present invention are laminated so that the two polarizing layers have a predetermined angle. As a result, a four-layer structure consisting of a polarizing layer, a coating film layer, a polarizing layer, and a coating film layer is formed in this order.
  • the polarization state is different at each wavelength, so that the second polarization Since the proportion of the vibration component parallel to the transmission axis of the layer is different, the intensity of the light transmitted through the second polarizing layer is different at each wavelength.
  • the light transmitted through the second polarizing layer changes its polarization state when it passes through the birefringent coating layer in the second laminated body, but the human eye distinguishes the polarization state. In addition to not being able to, in this case the intensity of the light does not change because there is no third polarizing layer after it.
  • Colors corresponding to wavelengths with high transmitted light intensity appear strong to the observer, and colors corresponding to wavelengths with weak transmitted light intensity appear weak to the observer, and these colors are combined. The color is observed by the observer. (6) Then, for example, the color finally observed changes depending on the thickness of the coating film layer, the degree of birefringence of the coating film, the angle at which the coating film is observed, and the like, and high designability is exhibited.
  • the laminated body of the present invention has a polarizing layer (first polarizing layer), a coating layer having birefringence, and a polarizing layer (first polarizing layer).
  • first polarizing layer a polarizing layer
  • first polarizing layer a coating layer having birefringence
  • first polarizing layer a polarizing layer
  • the second polarizing layer fulfills the function of the second polarizing layer described in (4) above, thereby exhibiting the same high designability.
  • the laminate of the present invention has a three-layer structure of a polarizing layer, a coating film layer having birefringence, and a reflective layer, the same high design property can be exhibited by one laminate. Can be done.
  • the light whose polarization state has changed after passing through the coating layer having birefringence in (3) above is reflected by the reflecting layer and again transmitted through the coating layer and the polarizing layer.
  • One polarizing layer functions as a first polarizing layer and a second polarizing layer.
  • FIG. 1 is a schematic view showing a cross section of an example of a laminated body according to the present invention.
  • the laminated body 1 includes the polarizing layer 20 and the coating film layer 30 in order.
  • the coating film layer 30 has birefringence (the same applies to FIGS. 2 to 8 below).
  • FIG. 2 is a schematic view showing a cross section of an example of the coating film layer of the laminate of the present invention.
  • the coating film layer 30 includes a plurality of film-type birefringent materials 31.
  • FIG. 3 is a schematic view showing a cross section of another example of the coating film layer of the laminate of the present invention.
  • the coating film layer 30 contains a plurality of fiber-type birefringent materials 32.
  • FIG. 4 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • the laminated body 1 includes a polarizing layer (first polarizing layer) 20, a coating film layer 30, and a second polarizing layer 21 in order.
  • FIG. 5 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • the laminated body 1 includes a polarizing layer 20, a coating film layer 30, and a reflective layer 40 in order.
  • FIG. 6 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • the laminated body 1 includes a polarizing layer 20, an adhesive layer 50, and a coating film layer 30 in this order.
  • FIG. 7 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • the laminated body 1 includes a polarizing layer (first polarizing layer) 20, an adhesive layer 50, a coating film layer 30, an adhesive layer 50, and a second polarizing layer 21 in order.
  • FIG. 8 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • the laminated body 1 includes a polarizing layer 20, an adhesive layer 50, a coating film layer 30, an adhesive layer 50, and a reflective layer 40 in order.
  • FIG. 9 is a schematic view showing a cross section of another example of the laminated body according to the present invention.
  • the laminated body 1 has, in order, a polarizing layer (first polarizing layer) 20, a coating film layer 30, a reflective layer 40, a coating film layer 30, and (second polarizing layer 21 and a reflective layer). 40) and is included.
  • the second polarizing layer 21 and the reflective layer 40 are in the same plane.
  • the polarizing layer is a layer having a function of polarizing natural light such as sunlight and artificial light.
  • the laminate according to the present invention includes two or more polarizing layers such as a second polarizing layer described later, the polarizing layer described here is treated as a first polarizing layer.
  • the polarizing layer is not particularly limited, and a known polarizing layer or polarizing film can be appropriately selected.
  • the polarizing layer include a linearly polarized light layer, a circularly polarized light layer, and an elliptical polarized light layer, depending on the type of polarized light after passing through the polarized light layer.
  • the polarizing layer may be an absorption type polarizing layer that absorbs light that does not pass through the polarizing layer, or may be a reflection type polarizing layer that reflects light that does not pass through the polarizing layer.
  • Examples of the absorption type polarizing layer include a dichroic dye-based polarizing layer, a polyene-based polarizing layer, and a wire grid polarizing layer.
  • Examples of the absorption type polarizing layer include those described in JP-A-2014-197163, JP-A-2013-130882, and JP-A-2017-090637.
  • dichroic dye-based polarizing layer examples include a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, and an ethylene / vinyl acetate copolymer system partially saponified film, and dichroic or dichroic. Examples thereof include those obtained by adsorbing a dichroic substance such as a dye and stretching the film uniaxially.
  • the polarizing layer is at least one selected from the group consisting of a linear polarizing layer, a circular polarizing layer, and an elliptically polarizing layer. In another embodiment, the polarizing layer is a linearly polarized layer.
  • the polarizing layer is at least one selected from the group consisting of a dichroic dye-based polarizing layer, a polyene-based polarizing layer, and a wire grid polarizing layer. In another embodiment, the polarizing layer is a dichroic dye-based polarizing layer.
  • a commercially available product may be used as the polarizing layer.
  • Examples of commercially available polarizing layers include Polar Techno's trade name SKN-18243T (absorbent polarizing film, iodine-based); SHC-215U, SHC-115U, SHC-125U, SHC-13U, SHC-B15U, SHC- B25U, SHC-SR3UL2S, VHC-12, VHC-128 (absorbent polarizing film, dye type); SKN-18243HN-31, SKN-18243HN-33 (semi-absorbent / semi-reflective polarizing film, iodine type); SHC- 115UH-31, SHC-115UH-33, SHC-115UH-41, SHC-125UH-31, SHC-125UH-33, SHC-125UH-41 (semi-absorbent / semi-reflective polarizing film, dye type); T1-
  • the polarizing layer may be a layer made of a coating film containing a polarizing pigment.
  • a polarizing layer made of a coating film containing a polarizing pigment can be obtained by coating a coating composition containing a polarizing pigment and optionally a solvent, a resin, or the like to form a coating film.
  • Examples of the polarizing pigment include those obtained by pulverizing the above-mentioned commercially available polarizing layer and polarizing film.
  • the polarization property of the polarizing pigment is not particularly limited, and is, for example, linear polarization property, circular polarization property, elliptically polarization property, and the like.
  • the polarizing pigment is at least one selected from the group consisting of linearly polarized pigments, circularly polarized pigments and elliptically polarized pigments.
  • the polarizing pigment may be, for example, a dichroic dye-based polarizing pigment, a polyene-based polarizing pigment, a wire grid polarizing pigment, or the like.
  • the polarizing pigment is at least one selected from the group consisting of dichroic dye-based polarizing pigments, polyene-based polarizing pigments, and wire grid polarizing pigments.
  • the shape of the polarizing pigment is not particularly limited and may be appropriately selected.
  • Examples of the shape of the polarizing pigment include a flat plate shape, a spherical shape, a substantially spherical shape, an ellipsoidal shape, a cubic shape, a rectangular parallelepiped shape, a prismatic shape, a columnar shape, and an irregular shape.
  • the shape of the polarizing pigment is at least one selected from the group consisting of flat plates, spheres and substantially spheres.
  • the dimensions of the polarizing pigment may be appropriately adjusted according to the desired appearance and the like. For example, in the case of a flat polarizing pigment, the dimension of the long side is 0.1 ⁇ m to 3 cm.
  • the average particle size is 0.5 to 500 ⁇ m.
  • the average particle size means the volume average particle size (D50) of the pigment-dispersed particles.
  • the average particle size can be measured using, for example, a laser diffraction type particle size distribution measuring device manufactured by Shimadzu Corporation, a particle size measuring device such as the trade name “SALD-2200”.
  • Examples of the solvent and resin which are optional components of the coating composition for forming the polarizing layer include the solvent and resin of the coating film layer described later, respectively.
  • the thickness of the polarizing layer may be appropriately adjusted, for example, 0.5 to 500 ⁇ m, preferably 10 to 250 ⁇ m. In one embodiment, the thickness of the polarizing layer is 10 ⁇ m or more, 50 ⁇ m or more, 100 ⁇ m or more, 150 ⁇ m or more, 200 ⁇ m or more, or 250 ⁇ m or more. In another embodiment, the thickness of the polarizing layer is 250 ⁇ m or less, 200 ⁇ m or less, 150 ⁇ m or less, 100 ⁇ m or less, 50 ⁇ m or less, or 10 ⁇ m or less.
  • the polarizing layer may or may not transmit light having wavelengths in other regions (for example, infrared rays and ultraviolet rays) as long as it can transmit at least a part of visible light.
  • each polarizing layer may have the same material; the type of polarized light transmitted; the type of the polarizing layer; and the thickness, etc., or may be different. May be good.
  • the number of polarizing layers in the laminate according to the present invention may be one layer or two or more layers. In one embodiment, the number of polarizing layers in the laminate is one. In another embodiment, the number of polarizing layers in the laminate is two.
  • the coating film layer is a layer having birefringence and formed by coating a coating composition. As described above, the coating film layer has a function of changing the polarization state of the light transmitted through the polarizing layer.
  • the birefringence of the coating film layer can be appropriately selected from the birefringence of the known birefringence layer and the birefringence of the retardation layer. Therefore, for example, as the coating layer, a 1/2 wavelength coating layer ( ⁇ / 2 coating layer) that imparts a phase difference of 1/2 wavelength to the transmitted light, and a 1/4 wavelength portion of the transmitted light. Examples thereof include a 1/4 wavelength coating layer ( ⁇ / 4 coating layer) that imparts a phase difference, and a C-plate type coating layer.
  • the coating film layer is at least one selected from the group consisting of a 1/2 wavelength coating film layer, a 1/4 wavelength coating film layer, and a C-plate type coating film layer. In another embodiment, the coating film layer is at least one selected from the group consisting of a 1/2 wavelength coating film layer and a 1/4 wavelength coating film layer.
  • the phase difference due to the coating film layer is at least one selected from the group consisting of one wavelength (360 °), 1/2 wavelength (180 °) and 1/4 wavelength (90 °). In another embodiment, the phase difference due to the coating film layer is at least one selected from the group consisting of 1/2 wavelength (180 °) and 1/4 wavelength (90 °). In yet another embodiment, the phase difference due to the coating film layer is 1/2 wavelength (180 °). In one embodiment, the phase difference is a value at a wavelength of 380 nm. In another embodiment, the phase difference is a value at a wavelength of 550 nm. In another embodiment, the phase difference is a value at a wavelength of 780 nm.
  • Examples of the coating film layer having birefringence include a coating film layer containing a birefringent material having birefringence; and a coating film layer in which the coating film layer itself has birefringence.
  • the birefringent material is not particularly limited, and a known birefringent material can be used.
  • the birefringent material include a cellulosic film such as cellophane tape; a stretched polyene film such as an OPP film; a retardation film; and a polymerizable or non-polymerizable liquid crystal compound; a polymer or a polymer fiber. ..
  • the liquid crystal compound refers to a compound whose molecular orientation is changed by an external voltage.
  • the retardation film as a birefringent material is, for example, a laminated film of a substrate and a retardation layer.
  • the substrate of the retardation film as a compound refraction material is, for example, a polyester-based substrate such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN); a cellulose-based substrate such as diacetyl cellulose and triacetyl cellulose (TAC); polymethyl methacrylate.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • TAC triacetyl cellulose
  • Acrylic substrates such as polystyrene and styrene-based substrates such as polystyrene and acrylonitrile-styrene copolymer (AS resin); polycarbonate-based substrates and the like.
  • the birefringent layer of the retardation film as a birefringent material includes, for example, a birefringent layer containing a thermoplastic resin; an oriented liquid crystal layer obtained by aligning a liquid crystal monomer and then cross-linking and polymerizing; an oriented liquid crystal layer of a liquid crystal polymer.
  • a birefringent layer containing a thermoplastic resin an oriented liquid crystal layer obtained by aligning a liquid crystal monomer and then cross-linking and polymerizing
  • an oriented liquid crystal layer of a liquid crystal polymer can be mentioned.
  • the birefringent layer described in JP2013-130882A can be mentioned.
  • the polymer or polymer fiber as the compound refraction material is, for example, polyester fiber such as polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN); nylon fiber; Cellulous fibers such as rayon, cupra, polynosic, modal, and lyocell; polyurethane fibers; acrylic fibers; acrylic fibers; cellulose acetate fibers such as acetate and triacetate; vinylon fibers; vinylar fibers; polyvinyl chloride; vinylidene fibers; aramid fibers; polyethylene , Polyene-based fiber such as polypropylene; Fluorine-based fiber; Promix fiber; Polyclar fiber; Polygonate fiber; Arginate fiber; Polyallylate-based fiber; Chemical fiber such as polyphenylene sulfide fiber.
  • polyester fiber such as polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT),
  • the dimensions of the birefringent material may be appropriately adjusted according to the desired appearance.
  • the long side dimension is 0.1 ⁇ m to 3 cm.
  • the thickness is 0.1 ⁇ m to 3.0 mm. It is preferably 1 ⁇ m to 1 mm. More preferably, it is 5 to 100 ⁇ m.
  • the average particle size is 0.1 ⁇ m to 3 mm.
  • the fiber diameter of the fiber is, for example, 0.1 ⁇ m to 3 mm, preferably 5 ⁇ m to 100 ⁇ m.
  • the length of the fiber is, for example, 10 ⁇ m to 5 cm, preferably 100 ⁇ m to 3 cm.
  • the birefringent material is at least one selected from the group consisting of cellulosic films, stretched polyene films, retardation films (including substrates) and polymers or polymer fibers.
  • the birefringent material is a non-liquid crystal compound.
  • the birefringent material is free of polymerizable liquid crystal compounds.
  • the birefringent material is free of liquid crystal compounds.
  • birefringent material A commercially available product may be used as the birefringent material.
  • commercially available products of birefringent materials include, for example, cellophane film, cellophane tape; Zeonoa film manufactured by Nippon Zeon (registered trademark); Pure Ace manufactured by Teijin (registered trademark); WV film manufactured by Fujifilm; JX liquid crystal. Examples include NH film and NV film manufactured by the company.
  • the coating film layer contains a birefringent material in the polymer matrix.
  • the coating layer comprises a birefringent material in a matrix of non-liquid polymer.
  • the coating layer comprises a compound refraction material in a polymer matrix, the polymer of the polymer matrix being an acrylic polymer, a polyester polymer, an alkyd polymer, a fluoropolymer, an epoxy polymer, a polyurethane polymer, a polyether polymer, At least one selected from the group consisting of silicone polymers and alkoxysilane condensate polymers.
  • the coating layer comprises a compound refraction material in a polymer matrix, the polymer of the polymer matrix being an acrylic polymer, a polyester polymer, an alkyd polymer, a fluoropolymer, an epoxy polymer, a polyurethane polymer, a polyether polymer, At least one non-liquid crystal polymer selected from the group consisting of silicone polymers and alkoxysilane condensate polymers.
  • the coating layer comprises a compound refraction material in the polymer matrix, the polymer of the polymer matrix being acrylic polymer, alkyd polymer, fluoropolymer, epoxy polymer, polyurethane polymer, polyether polymer, silicone polymer and At least one selected from the group consisting of alkoxysilane condensate polymers.
  • the coating layer comprises a compound refraction material in the polymer matrix, the polymer of the polymer matrix being acrylic polymer, alkyd polymer, fluoropolymer, epoxy polymer, polyurethane polymer, polyether polymer, silicone polymer and At least one non-liquid crystal polymer selected from the group consisting of alkoxysilane condensate polymers.
  • the ratio of the birefringent material in the coating film layer may be adjusted as appropriate.
  • the mass ratio of the birefringent material in the coating film layer is 1 to 99%, preferably 20 to 80%, and more preferably 30 to 70%.
  • the mass ratio of the birefringent material in the coating film layer is 30% or more, 40% or more, 50% or more, 60% or more or 70% or more.
  • the mass proportions of the birefringent material in the coating layer are 70% or less, 60% or less, 50% or less, 40% or less or 30% or less.
  • the proportion of the polymer matrix in the coating film layer may be appropriately adjusted.
  • the mass ratio of the non-birefringent polymer matrix in the coating film layer is 1 to 99%, preferably 20 to 80%, and more preferably 30 to 70%.
  • the mass ratio of the non-birefringent polymer matrix in the coating film layer is 30% or more, 40% or more, 50% or more, 60% or more or 70% or more.
  • the mass percentage of the non-birefringent polymer matrix in the coating layer is 70% or less, 60% or less, 50% or less, 40% or less or 30% or less.
  • the mass ratio of the birefringent material in the coating composition forming the coating film layer is, for example, 1 to 99%, preferably 20 to 80%, and more preferably 30 to 70% with respect to the total solid content. Is. In one embodiment, the mass ratio of the birefringent material in the coating composition forming the coating film layer is 30% or more, 40% or more, 50% or more, 60% or more or 70% or more. In another embodiment, the mass ratio of the birefringent material in the coating composition forming the coating film layer is 70% or less, 60% or less, 50% or less, 40% or less or 30% or less.
  • the mass ratio of the polymer in the coating composition forming the coating film layer is, for example, 1 to 99%, preferably 20 to 80%, and more preferably 30 to 70% with respect to the total solid content. .. In one embodiment, the mass ratio of the polymer in the coating composition forming the coating film layer is 30% or more, 40% or more, 50% or more, 60% or more or 70% or more. In another embodiment, the mass ratio of the polymer in the coating composition forming the coating film layer is 70% or less, 60% or less, 50% or less, 40% or less or 30% or less.
  • the coating film layer is not a liquid crystal layer as a whole.
  • the thickness of the coating film layer may be appropriately adjusted in consideration of the function of changing the polarization state of the light transmitted through the polarizing layer, for example, 0.1 ⁇ m to 3.0 mm, preferably 1 ⁇ m to 1 mm. It is more preferably 5 to 500 ⁇ m. In one embodiment, the thickness of the coating film layer is 5 ⁇ m or more, 10 ⁇ m or more, 20 ⁇ m or more, 30 ⁇ m or more, 40 ⁇ m or more, 50 ⁇ m or more, 60 ⁇ m or more, 70 ⁇ m or more, 80 ⁇ m or more, 90 ⁇ m or more, 100 ⁇ m or more, 200 ⁇ m or more, 300 ⁇ m. As mentioned above, it is 400 ⁇ m or more or 500 ⁇ m or more.
  • the thickness of the coating film layer is 500 ⁇ m or less, 400 ⁇ m or less, 300 ⁇ m or less, 200 ⁇ m or less, 100 ⁇ m or less, 90 ⁇ m or less, 80 ⁇ m or less, 70 ⁇ m or less, 60 ⁇ m or less, 50 ⁇ m or less, 40 ⁇ m or less, 30 ⁇ m or less, It is 20 ⁇ m or less, 10 ⁇ m or less, or 5 ⁇ m or less.
  • the coating film layer may or may not transmit light having wavelengths in other regions (for example, infrared rays and ultraviolet rays) as long as it can transmit at least a part of visible light.
  • the polarizing layer and the coating film layer may be arranged adjacent to each other as shown in FIGS. 1, 4 and 5, for example, as shown in FIGS. 6 to 8. It may be arranged via another one or more layers such as an adhesive layer.
  • the layer A and the layer B may be adjacent to each other, or one or two or more other layers may be provided between the layer A and the layer B. Indicates that it may exist. The same applies when the number of layers is three or more.
  • each coating film layer may have the same material; type of birefringence; and thickness, or may be different. May be.
  • the number of coating film layers having birefringence may be one layer or two or more layers.
  • the coating film layer is formed by coating a coating composition.
  • the coating composition forming the coating film layer contains the birefringent material.
  • the coating composition comprises a polymer (resin as a coating film forming element), a solvent, a pigment, a dispersant, a surfactant, an anti-sagging agent, a viscosity regulator, an anti-preservative, and a cross-linking accelerator.
  • the polymer examples include acrylic resin, polyester resin, alkyd resin, fluororesin, epoxy resin, polyurethane resin, and polyether resin.
  • the resin for example, a polymer compound containing an inorganic component or composed of an inorganic component, such as a silicone resin or an alkoxysilane condensate, can be used.
  • a resin as a known coating film forming element used in a coating composition or the like may be used.
  • a solvent such as a conventionally known paint composition and cosmetic composition can be appropriately selected and used.
  • alcohols such as methanol, ethanol, 2-propanol and 1-butanol; ethyl acetate, butyl acetate, isobutyl acetate, ethyl propionate, ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate and the like.
  • Ethers such as diethyl ether, propylene glycol monomethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, dioxane, tetrahydrofuran (THF); ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3- Glycos such as butylene glycol, pentamethylene glycol, 1,3-octylene glycol; formamide, N-methylformamide, dimethylformamide (DMF), dimethylacetamide, dimethylsulfoxide (DMSO), N-methylpyrrolidone (NMP) Amidos such as: acetone, methyl ethyl ketone (MEK), methylpropyl ketone, methyl isobutyl ketone, acetylacetone, cyclohexanone and other ketones; toluene, xylene, mesityylene, dodecylbenzene and other ketones;
  • the amount of solvent in the composition may be appropriately adjusted in consideration of coatability, viscosity and the like.
  • the coating layer contains a birefringent material
  • a coating composition containing a birefringent material of a predetermined size and optionally a polymer and a solvent is applied on a polarizing layer or another layer (for example, a release paper on a substrate).
  • the film is dried and cured to form a coating layer.
  • another polarizing layer, a reflective layer, an adhesive layer, or the like may be laminated on the coating film layer or the coating film to optionally cure the coating film.
  • the coating film layer is formed on the release paper on the base material, the release paper may be peeled off and the coating film layer may be laminated on the adhesive layer or the like.
  • the coating film layer or the coating film may be stretched after the coating film layer is formed or before the coating film is cured.
  • a known stretching treatment such as uniaxial stretching or biaxial stretching may be used, and for example, the stretching treatment described in JP-A-2014-197163 may be used.
  • the coating film layer is stretched.
  • the method of setting the birefringent material to a predetermined size is not particularly limited, and a known cutting and crushing method can be used.
  • a method for pulverizing the birefringent material for example, the pulverization method described in International Publication No. 2018/034261 can be used.
  • the method for preparing the coating composition is not particularly limited, and the birefringent material and other optional components such as a polymer and a solvent can be mixed and prepared using a known mixing device or the like. Further, a birefringent material having a predetermined size may be added to a known coating composition (base coating material) and mixed to prepare a coating composition.
  • the coating method of the coating composition is not particularly limited, and a conventionally known coating method can be used.
  • coating can be performed using an applicator, a bar coater, a brush, a spray, a roller, a roll coater, a curtain coater, or the like.
  • the coating may be performed by immersing a polarizing film or the like in a coating bath containing the coating composition.
  • the drying temperature after applying the coating composition may be appropriately adjusted according to the solvent and the like.
  • the temperature can be 30 to 200 ° C, preferably 40 to 160 ° C.
  • an energy ray such as a two-component curing reaction or ultraviolet rays may be used. If it is not necessary to dry in a short time, it may be dried at room temperature, for example.
  • the coating layer when the coating layer itself forms a coating layer having birefringence, for example, a coating composition containing a liquid crystal compound or a polymer such as molten polypropylene is coated and polymerized, crosslinked, or cured. By cooling or heating, a coating layer having birefringence is formed. After forming the coating film layer, the coating film layer may be stretched.
  • the laminates in order, With the polarizing layer (first polarizing layer), With the coating film layer Includes a reflective layer or a second polarizing layer.
  • the reflective layer is a layer having a function of reflecting light (visible light) such as light transmitted through a polarizing layer and a coating layer (visible light); or light transmitted through another laminate (visible light). Is.
  • the reflective layer may have a function of reflecting light as described above, and a known reflective layer such as an optical laminate can be used.
  • a known reflective layer such as an optical laminate can be used.
  • the reflective layer include a thin film made of a metal such as Al, Sn, Cu, Au, Ag, Cr, and Fe, a metal vapor deposition film, a plating, and a metal base material; for example, Sb 2 S 3 , Fe 2 O 3 , and TIO.
  • a permeable thin film made of such an inorganic material a laminate obtained by laminating a permeable thin film made of these inorganic materials can be used.
  • the bright material-containing coating film described in JP-A-2003-294622 and JP-A-2002-114940 may be used as the reflective layer.
  • the reflective layer is at least one selected from the group consisting of an aluminum thin film (aluminum foil), a metal vapor deposition film, plating, a glitter material-containing coating film, and a metal substrate.
  • the number of reflective layers in the laminated body may be one layer or two or more layers.
  • the dimensions and shape of the reflective layers are adjusted and arranged according to the type of the layer located between the reflective layers.
  • the lower reflective layer 40 of FIG. 9 is smaller in width than the coating film layer 30 so that the light reaches the coating film layer 30 between the two reflective layers 40.
  • the second polarizing layer 21 exists in the same layer plane.
  • the layer located between the two reflective layers two reflective layers having different reflective functions
  • the layer located between the two reflective layers is only an adhesive layer, even if the two reflective layers are arranged so as to cover the entire both sides of the adhesive layer. Good.
  • the function of the second polarizing layer; the material; the type of polarized light transmitted through; the type of the polarizing layer; and the thickness are as described in the above-mentioned polarizing layer.
  • the second polarizing layer is at least one selected from the group consisting of a linear polarizing layer, a circular polarizing layer, and an elliptically polarizing layer.
  • the second polarizing layer is a linear polarizing layer.
  • the first polarizing layer and the second polarizing layer are at least one selected from the group consisting of a linear polarizing layer, a circular polarizing layer, and an elliptically polarizing layer.
  • the first polarizing layer and the second polarizing layer are linearly polarized layers.
  • the second polarizing layer is at least one selected from the group consisting of a dichroic dye-based polarizing layer, a polyene-based polarizing layer, and a wire grid polarizing layer.
  • the second polarizing layer is a dichroic dye-based polarizing layer.
  • the first polarizing layer and the second polarizing layer are at least one selected from the group consisting of a dichroic dye-based polarizing layer, a polyene-based polarizing layer, and a wire grid polarizing layer.
  • the first polarizing layer and the second polarizing layer are dichroic dye-based polarizing layers.
  • the transmission axis of the second polarizing layer may or may not be orthogonal to the transmission axis of the first polarizing layer. In one embodiment, the transmission axis of the second polarizing layer is orthogonal to the transmission axis of the first polarizing layer.
  • the adhesive layer is a layer having a function of adhering one or two layers adjacent to the adhesive layer.
  • the adhesive layer include a photosensitive adhesive (UV curable adhesive) and a pressure sensitive adhesive.
  • the material of the adhesive layer include a thermoplastic resin, an acrylic resin, and a silicone resin.
  • adhesive resins and adhesive resins described in JP-A-2014-197163 can be mentioned.
  • the adhesive layer may or may not transmit light having wavelengths in other regions (for example, infrared rays and ultraviolet rays) as long as it can transmit at least a part of visible light.
  • the thickness of the adhesive layer is not particularly limited, and is, for example, 0.001 to 2 mm, preferably 0.01 to 1 mm, and more preferably 0.05 to 0.5 mm.
  • the number of layers of the laminate of the present invention is at least two because it includes a polarizing layer and a coating film layer.
  • the number of layers of the laminated body may be two layers, three layers, four layers, five layers, six layers, seven layers, eight layers, nine layers or ten layers.
  • the laminated body of the present invention may contain one layer or two or more layers other than the above-mentioned layers inside or outside the laminated body.
  • Examples of such other layers include the hard coat layer described in Japanese Patent Application Laid-Open No. 2013-1330882.
  • the laminate has a two-layer structure of a polarizing layer and a coating film layer in order.
  • the laminate has, in order, a three-layer structure of a first polarizing layer, a coating film layer, and a second polarizing layer.
  • the laminate has, in order, a three-layer structure of a polarizing layer, a coating film layer, and a reflective layer.
  • the laminate has a three-layer structure of a polarizing layer, a coating film layer, and a reflective layer in order, and the polarizing layer is a 1/2 wavelength coating film layer ( ⁇ / 2 coating film layer). Is.
  • the laminate has, in order, a three-layer structure of a polarizing layer, an adhesive layer, and a coating film layer. In yet another embodiment, the laminate has, in order, a five-layer structure of a first polarizing layer, an adhesive layer, a coating film layer, an adhesive layer, and a second polarizing layer. In yet another embodiment, the laminate has, in order, a five-layer structure of a polarizing layer, an adhesive layer, a coating film layer, an adhesive layer, and a reflective layer.
  • the laminate of the present invention may include the polarizing layer and the coating film layer in this order, and the dimensions and shape of each layer may be adjusted as appropriate.
  • two layers adjacent to each other in the stacking direction of the laminated body may have the same dimensions and the same shape in the layer plane direction, or may differ in one or both of the dimensions and the shape in the layer plane direction.
  • the dimensions of the laminate of the present invention may be appropriately adjusted according to the dimensions, shape, etc. of the object to which the laminate is applied.
  • the thickness of the laminate is, for example, 0.6 ⁇ m to 6 mm, preferably 100 ⁇ m to 1 mm. In one embodiment, the thickness of the laminate is 100 ⁇ m or more, 200 ⁇ m or more, 300 ⁇ m or more, 400 ⁇ m or more, 500 ⁇ m or more, 600 ⁇ m or more, 700 ⁇ m or more, 800 ⁇ m or more, 900 ⁇ m or more, or 1 mm or more.
  • the thickness of the laminate is 1 mm or less, 900 ⁇ m or less, 800 ⁇ m or less, 700 ⁇ m or less, 600 ⁇ m or less, 500 ⁇ m or less, 400 ⁇ m or less, 300 ⁇ m or less, 200 ⁇ m or less or 100 ⁇ m or less.
  • the thickness refers to the dimension in the laminating direction of the layers.
  • the laminate of the present invention may include the polarizing layer and the coating film layer in this order, and the shape is not limited.
  • the planar shape of the laminate (the shape of the laminate in FIG. 1 viewed from above in the figure) is a triangle; a quadrangle such as a rectangle, a square, a trapezoid, or a diamond; a pentagon; a hexagon; a heptagon; an octagon; It may be square; pentagon; circular; substantially circular; elliptical; amorphous or the like.
  • the laminate of the present invention may be used alone or in combination of two or more.
  • the use of the laminate according to the present invention is not particularly limited, and examples thereof include use for imparting design; use for protecting the surface of an article; use for toys; use for fishing such as lures, fishing rods, and hull wrapping of fishing boats.
  • the laminate according to the present invention can be suitably used for design-imparting applications.
  • One embodiment of the laminate according to the present invention is a laminate for imparting design.
  • the method for producing a laminate is not particularly limited as long as it can be produced so as to include a polarizing layer and a coating film layer in this order, and a known method for producing a laminate such as an optical film can be used.
  • examples of the method for producing the laminate include the following processes: A) Cellophane film as a birefringent material is crushed to a predetermined size; B) Prepare a coating composition containing a crushed cellophane film and a polymer as a binder; C) A coating composition is applied on one surface of the polarizing layer to form a film; D) The film is dried and cured to form a coating film layer. By the steps a) to d), the laminate shown in FIG. 1 is obtained.
  • the following steps e) and f) may be further performed.
  • E) Prepare a second polarizing layer with an adhesive layer on one surface;
  • F) A second polarizing layer is laminated via the adhesive layer on the surface of the coating film layer formed in step d) on the side opposite to the polarizing layer.
  • the article according to the present invention is an article having any of the above laminates.
  • the article having the laminate of the present invention is not particularly limited, and vehicles such as automobiles, trains, buses, and taxis; vehicle tires; ships; aircraft such as airplanes and helicopters; detached houses, apartments such as apartments, and offices.
  • the article of the present invention may have one laminate or may have two or more identical or different laminates.
  • the article of the present invention when the laminate has a two-layer structure of a polarizing layer and a coating film layer, the article of the present invention has a four-layer structure of a polarizing layer, a coating film layer, a polarizing layer and a coating film layer in this order on the surface of the article. It has two laminated bodies so as to be.
  • the laminate has a three-layer structure of a first polarizing layer, a coating film layer, and a second polarizing layer
  • the article of the present invention is, in order, on the surface of the article, the first polarizing layer. It has one laminated body so as to have a three-layer structure of a coating film layer and a second polarizing layer.
  • the method of applying the laminate to the article or the object is not particularly limited, and the laminate is attached to the article or the object by applying an adhesive or the like to either or both of the article or the object and the laminate. Can be applied.
  • Polarizing film Product name "SKN-18243T” (absorbent polarizing film) manufactured by Polatechno Co., Ltd., thickness 215 ⁇ m
  • Cellophane film Product name "monochromatic cellophane (transparent)” manufactured by Toyo Co., Ltd., thickness approx.
  • Example 1 A cellophane film as a birefringent material was mechanically crushed using a rotary crusher to obtain dimensions of 2 mm ⁇ 2 mm. Next, 100 parts by mass of the crushed cellophane film was added to 100 parts by mass of the solid content of the aqueous acrylic emulsion, and the mixture was stirred and mixed to obtain a coating composition. Next, the coating composition was coated on a polarizing film as a first polarizing layer and dried at room temperature for 1 hour to obtain a coating film layer having a thickness of 400 ⁇ m. Then, a UV curable adhesive was applied on the coating film layer. Next, a polarizing film as a second polarizing layer was placed on the UV curable adhesive.
  • the angle between the first polarizing layer and the second polarizing layer was set to 90 °.
  • UV is irradiated from the polarizing film side to cure the UV curable adhesive to form an adhesive layer, and in this order, a first polarizing layer, a coating layer, an adhesive layer, and a second polarizing layer.
  • a laminate having a four-layer structure was obtained. The obtained laminate had dimensions of 10 cm ⁇ 10 cm and a thickness of 930 ⁇ m.
  • Example 2 In the first embodiment, the first polarizing layer, the coating film layer, the adhesive layer, and the first polarizing layer, the coating film layer, the adhesive layer, and the like in the same manner as in Example 1 except that the polyester fiber was used instead of the cellophane film as the birefringent material.
  • a laminated body having a four-layer structure with two polarizing layers was obtained. The obtained laminate had dimensions of 10 cm ⁇ 10 cm and a thickness of 650 ⁇ m.
  • Example 3 In Example 1, the polarizing layer, the adhesive layer, and the coating film were sequentially formed in the same manner as in Example 1 except that a mirror film as a reflective layer was used instead of the polarizing film as the first polarizing layer. A laminated body having a four-layer structure consisting of a layer and a reflective layer was obtained. The obtained laminate had dimensions of 10 cm ⁇ 10 cm and a thickness of 800 ⁇ m.
  • Example 1 Comparative example 1
  • the first polarizing layer and the acrylic coating were sequentially applied in the same manner as in Example 1 except that the coating film was formed with an aqueous acrylic emulsion coating material containing no birefringent material instead of the coating film layer.
  • a comparative laminate having a four-layer structure consisting of a film, an adhesive layer, and a second polarizing layer was obtained.
  • the obtained comparative laminate had dimensions of 10 cm ⁇ 10 cm and a thickness of 930 ⁇ m.
  • Example 3 The laminates or comparative laminates obtained from each Example and Comparative Example were attached to the glass plate at the four corners with cellophane tape to obtain an article having the laminate or the comparative laminate on the glass plate.
  • the reflective layer was arranged adjacent to the glass plate.
  • the present invention it is possible to provide a laminate that is cheaper and can impart a high degree of design to an object. According to the present invention, it is possible to provide an article having a high degree of design.
  • Laminated body 20 Polarizing layer (first polarizing layer) 21: Second polarizing layer 30: Coating film layer 31: Birefringent material (film type) 32: Birefringent material (fiber type) 40: Reflective layer 50: Adhesive layer

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)

Abstract

L'invention fournit un stratifié meilleur marché, et permettant de développer des propriétés élevées d'un point de vue de la conception. En outre, l'invention fournit un article doté de propriétés élevées d'un point de vue de la conception. Plus précisément, l'invention concerne un stratifié qui contient dans l'ordre une couche de polarisation et une couche de film de revêtement. Ladite couche de film de revêtement possède des propriétés de biréfringence. En outre, l'invention concerne un article possédant ce stratifié.
PCT/JP2020/046429 2019-12-26 2020-12-11 Stratifié, et article WO2021131822A1 (fr)

Applications Claiming Priority (2)

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JP2019237402A JP2021104637A (ja) 2019-12-26 2019-12-26 積層体および物品
JP2019-237402 2019-12-26

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WO2021131822A1 true WO2021131822A1 (fr) 2021-07-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001315243A (ja) * 2000-03-02 2001-11-13 Merck Patent Gmbh 視野角に依存する反射特性を有する多層反射フィルムまたは顔料
JP2004351831A (ja) * 2003-05-30 2004-12-16 Toppan Printing Co Ltd カードの偽造防止方法及びそれに用いる偽造防止策を施したカード用転写媒体並びにカードの真偽判定方法
JP2009276401A (ja) * 2008-05-12 2009-11-26 Teijin Ltd 積層偏光板、及び液晶表示装置
JP2011148914A (ja) * 2010-01-22 2011-08-04 Konica Minolta Holdings Inc 繊維複合材料、光学フィルム、光学フィルムの製造方法、それを用いた偏光板および液晶表示装置
WO2018079130A1 (fr) * 2016-10-25 2018-05-03 富士フイルム株式会社 Film décoratif transmissif

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001315243A (ja) * 2000-03-02 2001-11-13 Merck Patent Gmbh 視野角に依存する反射特性を有する多層反射フィルムまたは顔料
JP2004351831A (ja) * 2003-05-30 2004-12-16 Toppan Printing Co Ltd カードの偽造防止方法及びそれに用いる偽造防止策を施したカード用転写媒体並びにカードの真偽判定方法
JP2009276401A (ja) * 2008-05-12 2009-11-26 Teijin Ltd 積層偏光板、及び液晶表示装置
JP2011148914A (ja) * 2010-01-22 2011-08-04 Konica Minolta Holdings Inc 繊維複合材料、光学フィルム、光学フィルムの製造方法、それを用いた偏光板および液晶表示装置
WO2018079130A1 (fr) * 2016-10-25 2018-05-03 富士フイルム株式会社 Film décoratif transmissif

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