WO2020075835A1 - Feuille de résine et dispositif d'affichage d'image l'utilisant, ainsi que feuille de transfert - Google Patents

Feuille de résine et dispositif d'affichage d'image l'utilisant, ainsi que feuille de transfert Download PDF

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Publication number
WO2020075835A1
WO2020075835A1 PCT/JP2019/040153 JP2019040153W WO2020075835A1 WO 2020075835 A1 WO2020075835 A1 WO 2020075835A1 JP 2019040153 W JP2019040153 W JP 2019040153W WO 2020075835 A1 WO2020075835 A1 WO 2020075835A1
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Prior art keywords
resin
layer
sheet
resin sheet
concavo
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PCT/JP2019/040153
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English (en)
Japanese (ja)
Inventor
貴之 嶋田
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大日本印刷株式会社
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Priority to JP2020551242A priority Critical patent/JP7268686B2/ja
Publication of WO2020075835A1 publication Critical patent/WO2020075835A1/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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors

Definitions

  • the present invention relates to a resin sheet, an image display device using the resin sheet, and a transfer sheet.
  • a resin sheet having a concavo-convex structure may be installed on the front surface of the display element of the image display device for the purpose of suppressing reflection of external light (providing antiglare property).
  • Patent Documents 1 and 2 As technologies for suppressing glare due to surface irregularities, for example, the technologies of Patent Documents 1 and 2 have been proposed.
  • Patent Document 1 suppresses glare by increasing the ratio of internal haze to total haze (internal haze / total haze).
  • Patent Document 2 suppresses glare without increasing the internal haze more than necessary by preventing the inclination angle distribution of the unevenness from being biased to a specific angle.
  • a predetermined internal haze is provided in order to suppress glare (paragraph 0035 of Patent Document 2, Example).
  • the present invention has been made under such circumstances, and provides a resin sheet and an image display device that suppress glare while suppressing deterioration of image sharpness due to internal haze, and that have antiglare properties. With the goal.
  • Another object of the present invention is to provide a transfer sheet for producing the resin sheet.
  • the present invention provides the following [1] to [3].
  • [1] A resin sheet having a concavo-convex region on one surface, the internal haze of the portion having the concavo-convex region is 3.0% or less, and the cut-off value ⁇ c of the concavo-convex region is 0.8 mm.
  • Ra1 and Sm1 are defined when the arithmetic mean roughness of JIS B0601: 1994 is Ra1 and the average interval of the irregularities of JIS B0601: 1994 is Sm1 when the cut-off value ⁇ c of the irregular area is 0.8 mm.
  • Is a resin sheet satisfying the following formulas (1) and (2).
  • the internal haze of the portion having the concavo-convex region of the sample A is 3.0% or less, and the arithmetic mean roughness of JIS B0601: 1994 when the cutoff value ⁇ c of the concavo-convex region of the sample A is 0.8 mm.
  • Ra1 and Sm1 are defined by the following formulas (1) and (2) when Sm1 is defined as the average interval of the unevenness of JIS B0601: 1994 when the cutoff value ⁇ c of the unevenness area of Ra1 and sample A is 0.8 mm. ) Is satisfied.
  • An image display device having a display element and a front plate arranged on the light emitting surface side of the display element, wherein the resin sheet according to the above [1] is used as the front plate in the concavo-convex region.
  • An image display device which is arranged such that a surface of a side provided with the display element faces the side opposite to the display element.
  • the resin sheet and the image display device of the present invention can suppress glare and prevent glare while suppressing deterioration of image clarity due to internal haze. Further, by using the transfer sheet of the present invention, the resin sheet can be easily manufactured.
  • AA to BB means AA or more and BB or less.
  • the resin sheet of the present invention is provided with a concavo-convex region on one surface, the internal haze of the portion having the concavo-convex region is 3.0% or less, and the cut-off value ⁇ c of the concavo-convex region is 0.8 mm.
  • Ra1 and Sm1 are defined when the arithmetic mean roughness of JIS B0601: 1994 is Ra1 and the average interval of the irregularities of JIS B0601: 1994 is Sm1 when the cut-off value ⁇ c of the irregular area is 0.8 mm. Satisfies the following formulas (1) and (2).
  • FIGS. 1 and 2 are cross-sectional views showing an embodiment of a resin sheet 1000 of the present invention.
  • the resin sheet 1000 shown in FIGS. 1 and 2 has an uneven area A1 on one surface.
  • the resin sheet 1000 of FIGS. 1 and 2 has a smooth area A2 adjacent to the uneven area A1 on the one surface.
  • the resin sheet 1000 of FIG. 1 has the resin layer 10 and the transparent base material 50, and has a concavo-convex area A1 on the surface on the resin layer side.
  • the resin sheet 1000 of FIG. 2 has a transfer layer 100 and an adherend 200, and the transfer layer 100 has a resin layer 10, an anchor coat layer 20 and an adhesive layer 30, and has a concavo-convex region on the surface on the resin layer side. It has A1.
  • the resin sheet of the present invention has an uneven region on one surface.
  • the concavo-convex area A1 may be formed on a part of one surface of the resin sheet 1000 as shown in FIGS. 1 and 2, or may be formed on the entire one surface of the resin sheet 1000. .
  • the designability of the resin sheet may differ due to the difference in texture between the concavo-convex area A1 and other areas (for example, a smooth area A2 described later).
  • the uneven surface may be formed on a part or all of the other surface of the resin sheet, but from the viewpoint of improving the image clarity, the other surface is preferably smooth.
  • “smooth” means that the arithmetic average roughness Ra1 is 0.030 ⁇ m or less, preferably 0.020 ⁇ m or less, and more preferably 0.010 ⁇ m or less.
  • the resin sheet of the present invention needs to have an internal haze of 3.0% or less at a portion having an uneven region.
  • the internal haze exceeds 3.0%, it is not possible to suppress the reduction in the sharpness of the image.
  • the decrease in image clarity due to the internal haze becomes a serious problem. It is important to set it to 0% or less.
  • each layer constituting the resin sheet does not substantially contain a diffusing component such as particles.
  • substantially free means that the content of diffusion components such as particles in each layer is 0.1% by mass or less, more preferably 0.01% by mass or less, and further preferably 0% by mass. is there.
  • the particles may be contained as long as the ratio of the refractive index of the particles to the refractive index of the resin forming the layer is 1.00.
  • the interface of each layer constituting the resin sheet is smooth.
  • the internal haze at the portion having the uneven region of the resin sheet is preferably 1.5% or less, more preferably 0.5% or less, further preferably 0.2% or less, and 0%. It is even more preferred to be present.
  • the internal haze can be measured by crushing the surface unevenness of the uneven area by, for example, attaching a transparent sheet on the uneven area, and can be measured by the method described in Examples, for example.
  • internal haze, total haze, arithmetic average roughness Ra, average interval Sm of unevenness, ten-point average roughness Rz, average inclination angle ⁇ a, and transmitted image sharpness are visually abnormal such as dust and scratches.
  • a sample cut out from a pointless spot is prepared, and the average value of the measured values at 20 arbitrary spots without defects or abnormal points is used.
  • the resin sheet of the present invention preferably has a total haze of 1.0 to 15.0%, more preferably 2.0 to 10.0%, and further preferably 3.0 to 7.5%. More preferable. By setting the total haze to 1.0% or more, the antiglare property can be easily improved, and by setting the total haze to 15.0% or less, it is possible to easily suppress the decrease in the sharpness of the image.
  • the resin sheet of the present invention has a JIS B0601: 1994 arithmetic average roughness Ra1 when the cut-off value ⁇ c is 0.8 mm and a JIS when the cut-off value ⁇ c is 0.8 mm.
  • Ra1 and Sm1 need to satisfy the following formulas (1) and (2).
  • the unevenness of the uneven area corresponds to a lens for the pixel of the display element.
  • the arithmetic mean roughness Ra is large, the thickness of the irregularities in the irregularity region (in other words, the thickness of the lens) tends to increase, and the glare tends to deteriorate, and the average of the irregularities. It has been found that if the spacing Sm is large, the spacing between the irregularities in the irregularity region (in other words, the diameter of the lens) increases, and the glare tends to deteriorate.
  • Ra1 ⁇ Sm1 exceeds 5.00 and does not satisfy the formula (1), the thickness of the lens formed by the concavities and convexities and / or the diameter of the lens formed by the concavities and convexities causes glare. Cannot be suppressed.
  • Ra1 ⁇ Sm1 is preferably 4.80 or less, more preferably 4.30 or less, and further preferably 4.00 or less. If Ra1 ⁇ Sm1 is too small, the lens formed by the irregularities becomes small, and the antiglare property may be insufficient. Therefore, Ra1 ⁇ Sm1 is preferably 2.00 or more, more preferably 2.50 or more, further preferably 3.00 or more, and further preferably 3.20 or more. preferable.
  • the unit of Ra1 ⁇ Sm1 is [ ⁇ m 2 ].
  • Ra1 is less than 0.050 ⁇ m and the formula (2) is not satisfied, the antiglare property cannot be improved. If Ra1 is too large, the thickness of the lens formed by the concavities and convexities tends to increase, resulting in worsening of glare and deterioration of image sharpness. Therefore, Ra1 is preferably 0.060 to 0.300 ⁇ m, more preferably 0.070 to 0.200 ⁇ m, and further preferably 0.080 to 0.130 ⁇ m.
  • the range of Sm is not particularly limited as long as it satisfies the above formulas (1) and (2), but is preferably 10 to 100 ⁇ m, more preferably 20 to 80 ⁇ m, and further preferably 30 to 70 ⁇ m. .
  • the resin sheet of the present invention has Rz1 of 0.200 to 1.000 ⁇ m when Rz1 is defined as the ten-point average roughness of JIS B0601: 1994 when the cutoff value ⁇ c of the concavo-convex region is 0.8 mm. It is more preferable that the thickness is 0.300 to 0.900 ⁇ m, further preferably 0.400 to 0.800 ⁇ m.
  • ⁇ a1 is 0.50 degrees or more when the average inclination angle of the uneven region is defined as ⁇ a1.
  • ⁇ a1 is 0.50 degrees or more when the average inclination angle of the uneven region is defined as ⁇ a1.
  • ⁇ a1 is more preferably 0.50 to 3.00 degrees, more preferably 0.80 to 2.50 degrees, and further preferably 1.00 to 2.20 degrees.
  • the reference length is divided into 1500, height data of 1500 points is obtained, and the average inclination angle ⁇ a is calculated based on the height data of 1500 points.
  • Ra1, Sm1 and ⁇ a1 preferably satisfy the following formula (3). 1.30 ⁇ 10 ⁇ 3 ⁇ Ra1 [ ⁇ m] / Sm1 [ ⁇ m] / ⁇ a1 (degrees) (3)
  • Ra1 is the average of heights and Sm1 is the average interval of the unevenness
  • Ra1 / Sm1 is approximate to the average inclination of the unevenness in one cycle. Therefore, it seems that Ra1 / Sm1 and ⁇ a1 have a correlation, but in reality, there is often no correlation between them. This is because ⁇ a1 reflects fine unevenness (fine unevenness superimposed on one cycle of unevenness (large unevenness)), while Ra1 / Sm1 hardly reflects fine unevenness. More specifically, as described above, since the average inclination angle ⁇ a is measured by dividing the reference length into 1500, the value tends to increase when there are many fine irregularities.
  • “Ra1 [ ⁇ m] / Sm1 [ ⁇ m] / ⁇ a1 (degree)” is more preferably 1.33 ⁇ 10 ⁇ 3 or more, and further preferably 1.35 ⁇ 10 ⁇ 3 or more.
  • the upper limit of “Ra1 [ ⁇ m] / Sm1 [ ⁇ m] / ⁇ a1 (degrees)” is not particularly limited, but is usually 1.70 ⁇ 10 ⁇ 3 or less, preferably 1.60 ⁇ 10 ⁇ 3 or less.
  • Ra1 and Rz1 of the resin sheet of the present invention satisfy the following formula (4). 3.0 ⁇ Rz1 / Ra1 ⁇ 10.0 (4)
  • Rz1 / Ra1 is a parameter that is an index of the randomness of unevenness (the larger Rz1 / Ra1 is, the higher the randomness is).
  • Rz1 / Ra1 By setting Rz1 / Ra1 to be 10.0 or less, it is possible to suppress glare and improve the extremely fine appearance. Further, by setting Rz1 / Ra1 to be 3.0 or more, it is possible to make defects in the concavo-convex region inconspicuous.
  • Rz1 / Ra1 is more preferably 4.0 to 8.0, and further preferably 5.0 to 7.5.
  • the resin sheet of the present invention has a width of an optical comb of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm, respectively, in accordance with JIS K7374: 2007.
  • the transmitted image sharpness was measured, and the transmitted image sharpness with an optical comb width of 0.125 mm was C 0.125 , the transmitted image sharpness with an optical comb width of 0.25 mm was C 0.25 , and the optical comb width was 0.5 mm.
  • the definition of the transmission image of C is 0.5
  • the definition of the transmission image of which the width of the optical comb is 1.0 mm is C 1.0
  • the definition of the transmission image of which the width of the optical comb is 2.0 mm is C 2.0
  • C 0.125 , C 0.25 , C 0.5 , C 1.0 and C 2.0 are preferably 300% or more.
  • the sum of C 0.125 , C 0.25 , C 0.5 , C 1.0 and C 2.0 is more preferably 315% or more, further preferably 325% or more.
  • the upper limit of the total of C 0.125 , C 0.25 , C 0.5 , C 1.0 and C 2.0 is not particularly limited, but is usually 450% or less, preferably 435% or less.
  • the resin sheet of the present invention preferably has a total light transmittance of 50% or more, more preferably 70% or more, at a portion having an uneven region, measured according to JIS K7361-1: 1997. It is more preferably 90% or more.
  • the resin sheet of the present invention preferably has a smooth area A2 adjacent to the uneven area A1 on the one surface.
  • a difference in texture is imparted to the surface of the resin sheet based on the difference in gloss between the two areas, and the design of the resin sheet can be improved.
  • the arrangement of the concavo-convex area A1 and the smooth area A2 is arbitrary.
  • a configuration in which one independent concavo-convex area A1 is arranged and a smooth area A2 surrounding the concavo-convex area A1 is arranged (type 1 (configurations in FIGS. 1 to 3)); one independent smooth area A2 is arranged.
  • a configuration in which a concavo-convex region A1 surrounding the smooth region A2 is arranged (type 2); a configuration in which a plurality of independent concavo-convex regions A1 are arranged and a smooth region A2 is arranged around the plural concavo-convex regions A1 (type 3) ); A configuration in which a plurality of independent smooth areas A2 are arranged and the concavo-convex area A1 is arranged around the plurality of smooth areas A2 (type 4);
  • types 1 and 2 are preferable because it is easy to recognize the effects of the present invention.
  • the ratio of the area (S1) of the concavo-convex area A1 to the area (S2) of the smooth area A2 is not particularly limited because it changes in relation to the design to be given, but the difference in texture between the two areas is made clear. From the viewpoint, it is preferable that 0.1 ⁇ S1 / S2 ⁇ 10.0. Further, from the viewpoint of clarifying the difference in texture between the two regions while exhibiting the effect of the present invention in a wide range of the resin sheet, 1.0 ⁇ S1 / S2 ⁇ 10.0 is more preferable, More preferably, 1.5 ⁇ S1 / S2 ⁇ 7.5.
  • the entire smooth region A2 may have a light-transmitting property or may have a light-shielding property as a whole, and a light-transmitting part and a light-shielding part are mixed. Good.
  • Ra2 is preferably 0.030 ⁇ m or less, more preferably 0.020 ⁇ m or less, and further preferably 0.010 ⁇ m or less.
  • the difference (Ra1-Ra2) between Ra1 and Ra2 is preferably 0.020 ⁇ m or more, more preferably 0.030 ⁇ m or more, and further preferably 0.050 ⁇ m or more.
  • Ra1-Ra2 By setting Ra1-Ra2 to be 0.020 ⁇ m or more, it is possible to easily recognize the difference in texture between the uneven area A1 and the smooth area A2.
  • the layer structure of the resin sheet include a single layer structure of a resin layer having an uneven region on one surface, and a multilayer structure of laminating another layer on the resin layer.
  • Such a resin sheet can be manufactured by, for example, the following methods (A) and (B).
  • the method (B) below is preferable in that the base material that causes rainbow unevenness (rainbow-like unevenness caused by light transmission through the base material having birefringence) can be eliminated.
  • B Transfer using a transfer sheet having a transfer layer on the release sheet.
  • the manufacturing method of the above (A) includes the following steps (A1) and (A2).
  • A1) A step of applying a coating liquid for forming a resin layer on a transparent substrate to form a coating film.
  • A2 A step of pressing a plate on the coating film to shape the coating film.
  • the step (A1) is a step of applying a resin layer-forming coating liquid on a transparent substrate to form a coating film.
  • the coating liquid for forming a resin layer contains at least a resin component. Details of the composition of the coating liquid for forming the resin layer will be described later.
  • a general-purpose applying means selected from gravure coating, comma coating, die coating, bar coating and the like may be adopted.
  • the resin layer forming coating liquid may contain a solvent.
  • the solvent one kind or two or more kinds of general-purpose solvents can be used.
  • the step (A1) includes a drying step.
  • the resin component of the coating liquid for forming a resin layer contains an ionizing radiation-curable compound
  • a step of forming another layer on the transparent base material may be performed before the step (A1).
  • the step (A2) is a step of pressing a plate against the coating film to shape the coating film.
  • a plate having a shape complementary to the surface shape of the resin sheet as the plate it is possible to form a resin layer having a desired surface shape.
  • the resin component contains an ionizing radiation-curable compound
  • it may be irradiated with ionizing radiation after the step (A2) (after the plate is separated from the coating film surface), but the surface shape of the plate is applied to the surface of the resin layer.
  • it is preferable to irradiate with ionizing radiation at the same time as the step (A2).
  • the ionizing radiation is irradiated at the same time as the step (A2)
  • the irradiation is preferably performed from the transparent substrate side.
  • the plate in the step (A2) is preferably one having the surface of a roll-shaped material imprinted, and more preferably one having the surface of a metal roll imprinted.
  • the surface material of the metal roll include copper, nickel, chromium and alumina. It is preferable to plate these metals as necessary.
  • the plate of the step (A2) a plate having a shape that is not the same as the surface shape of the resin sheet is used, and after the step (A2), a step of forming a second resin layer on the resin layer (step (A3)) is performed.
  • the expressions (1) and (2) can be adjusted by the thickness of the second resin layer.
  • Ra and ⁇ a tend to be small, and the decreasing rate of ⁇ a tends to be larger than Ra. Further, the decreasing rate of ⁇ a tends to be larger than the increasing rate of Sm described above. Therefore, by forming the second resin layer, the above formula (3) can be easily satisfied.
  • the transparent base material may be peeled from the resin layer after the step (A2) to form a single resin layer.
  • the plate used in the step (A2) and the step (B0-2) described later is obtained by engraving the surface of the cylinder into a desired shape by, for example, etching, sandblasting, cutting and laser processing, or a combination thereof. be able to. Alternatively, it can be obtained by producing a plate having the same shape as the shape to be applied to the plate by laser engraving, stereolithography, etc., and inverting the plate and winding it around the surface of the cylinder.
  • sandblasting is preferable from the viewpoint of easily controlling the ranges of formula (1) and formula (2).
  • sandblasting for example, the material of the cylinder surface, the particle size of the abrasive, the shape of the abrasive, the material of the abrasive, the number of times the abrasive collides with the cylinder, the distance between the injection nozzle and the cylinder, the diameter of the injection nozzle, and the workpiece.
  • the concavo-convex shape can be adjusted by controlling the angle of the ejection nozzle with respect to the object, the ejection pressure, the ejection frequency, and the like.
  • the shape of the abrasive, the particle size, and the injection pressure are the most effective and simple for controlling the expressions (1) and (2).
  • increasing the particle size of the abrasive tends to increase both Ra1 and Sm1
  • decreasing the particle size of the abrasive tends to decrease both Ra1 and Sm1. Therefore, if only the formula (1) is taken into consideration, the particle size of the abrasive should be made small, but if the particle size of the abrasive is made small, it becomes difficult to satisfy the formula (2).
  • the injection pressure is increased, the particles deeply penetrate and Ra1 increases, while Sm1 hardly changes.
  • the shape of the abrasive material spherical, it is possible to obtain a smooth and uneven shape having no specific shape, so that it becomes easy to adjust the surface shape by the particle diameter of the abrasive material and the injection pressure. From the above, it is preferable to use spherical abrasives and to increase the injection pressure while reducing the particle size of the abrasives, since it is easy to satisfy the expressions (1) and (2).
  • step (A3) and the step (B0-3) described later are performed while using the plate produced by sandblasting as described above. preferable.
  • the manufacturing method of the above (B) includes the following steps (B1) to (B3).
  • (B1) A step of obtaining a transfer sheet by forming a transfer layer including a resin layer on the release sheet.
  • B2 A step of obtaining a laminate in which the surface of the transfer sheet on the transfer layer side and the adherend are in close contact with each other.
  • (B3) A step of separating the release sheet of the transfer sheet from the laminate.
  • Step (B1) is a step of forming a transfer layer including a resin layer on the release sheet to obtain a transfer sheet.
  • a release sheet having a shape complementary to the surface shape of the resin sheet as the release sheet the surface shape of the transfer layer ( ⁇ surface shape of the resin sheet) can be made into a desired shape.
  • Examples of the structure of the transfer layer including the resin layer include the following structures (Y1) to (Y6).
  • “/” indicates the interface of layers, and the closer to the left side, the closer to the release sheet.
  • (Y1) Single layer of resin layer (Y2) Resin layer / Adhesive layer (Y3) Resin layer / Anchor coat layer / Adhesive layer (Y4) Antireflection layer / Resin layer (Y5) Antireflection layer / Resin layer / Adhesion Agent layer (Y6) Antireflection layer / Resin layer / Anchor coat layer / Adhesive layer
  • Each layer constituting the transfer layer can be formed by applying the coating liquid constituting each layer by a general-purpose coating means selected from gravure coating, comma coating, die coating, bar coating, etc., and drying and curing as necessary. .
  • the release sheet used in the step (B1) can be manufactured, for example, by the following steps (B0-1) to (B0-2).
  • B0-1 A step of applying a coating liquid for forming a concavo-convex layer containing an ionizing radiation curable resin composition on a support to form a coating film containing the ionizing radiation curable resin composition.
  • B0-2) A step of pressing the plate against the coating film and simultaneously irradiating it with ionizing radiation to cure the shaped uneven layer.
  • a desired surface shape can be obtained.
  • the release sheet provided can be obtained.
  • the plate of the step (B0-2) is preferably a roll-shaped product having a surface shaped, and more preferably a metal roll having a surface shaped.
  • the surface material of the metal roll include copper, nickel, chromium and alumina. It is preferable to plate these metals as necessary.
  • the plate of the step (B0-2) a plate having the same shape as the surface shape of the release sheet is used, and after the step (B0-2), a step of forming a release layer on the uneven layer (step ( B0-3)) may be performed.
  • the release layer Ra tends to decrease and Sm tends to increase, and the Sm increasing rate tends to be larger than the Ra decreasing rate. Therefore, the above formulas (1) and (2) can be adjusted by the thickness of the release layer. Further, by forming the release layer, Ra and ⁇ a tend to be small, and the decreasing rate of ⁇ a tends to be larger than that of Ra. Further, the decreasing rate of ⁇ a tends to be larger than the increasing rate of Sm described above. Therefore, by forming the release layer, it is possible to easily satisfy the above formula (3).
  • Step (B2) is a step of obtaining a laminate in which the surface of the transfer sheet on the transfer layer side and the adherend are in close contact with each other. Further, the step (B3) is a step of separating the release sheet of the transfer sheet from the laminate.
  • a well-known transfer method can be used for the steps (B2) and (B3).
  • injection molding simultaneous transfer decoration method injection molding simultaneous transfer decoration method
  • the resin sheet can have a complicated shape such as a three-dimensional curved surface.
  • (A) a step of disposing the surface of the transfer sheet on the transfer layer side toward the inside of the in-mold molding die; (B) a step of injecting a resin into the in-mold molding die, (C) a step of obtaining a laminate in which the surface of the transfer sheet on the transfer layer side is integrated (adhered) with the resin, (D) After taking out the laminate from the mold, the step of separating (peeling) the release sheet of the transfer sheet from the laminate is included.
  • the layer constituting the transfer layer for example, a resin layer
  • the semi-cured layer is completely cured by irradiating with ultraviolet rays after the step (d) is completed.
  • the layer structure of the resin sheet include the following structures (Z1) to (Z4).
  • “/” indicates the interface of the layers, the closer to the left side means the surface side, and the unevenness area is formed on the surface of the leftmost layer. means.
  • the transfer layer including the following resin layer (Z4) has, for example, the configurations (Y1) to (Y6) described above. When the above-mentioned (Y1) to (Y6) are applied to the transfer layer including the following resin layer (Z4), the layer located on the right side of (Y1) to (Y6) is arranged on the adherend side of (Z4).
  • the resin sheet of the present invention has an internal haze of 3.0% or less at a portion having an uneven region. For this reason, as described above, it is preferable that each layer constituting the resin sheet such as the resin layer does not substantially contain a diffusion component such as particles.
  • the resin layer preferably contains a cured product of the curable resin composition as a main component.
  • the main component means 50% by mass or more of the total solids constituting the resin layer, the ratio is preferably 70% by mass or more, more preferably 80% by mass or more, and 90% by mass or more. Is more preferable.
  • the “resin layer” means both a resin layer formed by the above method (A) and a resin layer formed by the above method (B), unless otherwise specified.
  • the cured product of the curable resin composition examples include a cured product of a thermosetting resin composition and a cured product of an ionizing radiation curable resin composition, and among these, a cured product of an ionizing radiation curable resin composition is preferable.
  • the resin layer may contain a thermoplastic resin, but the amount thereof is preferably a very small amount from the viewpoint of improving scratch resistance.
  • the content of the thermoplastic resin in the resin layer is preferably less than 5% by mass, more preferably less than 1% by mass, further preferably less than 0.1% by mass, Even more preferably, it is 0% by mass.
  • the cured product of the curable resin composition and the thermoplastic resin may be referred to as “resin component”.
  • the thermosetting resin composition is a composition containing at least a thermosetting resin and is a resin composition that is cured by heating.
  • the thermosetting resin include acrylic resin, urethane resin, phenol resin, urea melamine resin, epoxy resin, unsaturated polyester resin, and silicone resin.
  • a curing agent is added to these curable resins as needed.
  • the ionizing radiation curable resin composition is a composition containing a compound having an ionizing radiation curable functional group (hereinafter, also referred to as “ionizing radiation curable compound”).
  • ionizing radiation curable compound examples include (meth) acryloyl group, vinyl group, ethylenically unsaturated bond group such as allyl group, epoxy group, oxetanyl group and the like.
  • the ionizing radiation curable resin is preferably a compound having an ethylenically unsaturated bond group.
  • a compound having two or more ethylenically unsaturated bond groups is more preferable, and among them, an ethylenically unsaturated bond is preferable.
  • a polyfunctional (meth) acrylate compound having two or more saturated bond groups is more preferable.
  • the ionizing radiation means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking a molecule, and usually ultraviolet rays (UV) or electron beams (EB) are used.
  • UV ultraviolet rays
  • EB electron beams
  • Electromagnetic waves such as X-rays and ⁇ -rays and charged particle beams such as ⁇ -rays and ion rays can also be used.
  • examples of the bifunctional (meth) acrylate-based monomer include ethylene glycol di (meth) acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexane. Examples thereof include diol diacrylate.
  • Examples of the trifunctional or higher functional (meth) acrylate-based monomer include, for example, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and dipentaerythritol hexa (meth) acrylate.
  • Examples thereof include pentaerythritol tetra (meth) acrylate and isocyanuric acid-modified tri (meth) acrylate.
  • the (meth) acrylate-based monomer may be one in which a part of the molecular skeleton is modified, and is modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, or the like. It can also be used.
  • polyfunctional (meth) acrylate oligomer examples include acrylate polymers such as urethane (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, and polyether (meth) acrylate.
  • Urethane (meth) acrylate is obtained by, for example, reacting a polyhydric alcohol and an organic diisocyanate with hydroxy (meth) acrylate.
  • Preferred epoxy (meth) acrylates are (meth) acrylates obtained by reacting a (meth) acrylic acid with a trifunctional or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like.
  • (Meth) acrylates obtained by reacting the above aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc. with a polybasic acid and (meth) acrylic acid, and a bifunctional or higher functional aromatic epoxy resin, (Meth) acrylate obtained by reacting an alicyclic epoxy resin, an aliphatic epoxy resin or the like with a phenol and (meth) acrylic acid.
  • the ionizing radiation curable resins may be used alone or in combination of two or more.
  • the resin layer forming coating liquid preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator.
  • a photopolymerization initiator include one or more selected from acetophenone, benzophenone, ⁇ -hydroxyalkylphenone, Michler's ketone, benzoin, benzyldimethylketal, benzoylbenzoate, ⁇ -acyl oxime ester, thioxanthones and the like.
  • the photopolymerization accelerator is one that can reduce the inhibition of polymerization by air at the time of curing and accelerate the curing rate.
  • p-dimethylaminobenzoic acid isoamyl ester
  • p-dimethylaminobenzoic acid ethyl ester and the like can be used. At least one selected from the above is included.
  • the curable resin composition is in a semi-cured state at the time of forming the resin layer, and after being transferred to an adherend, the curable resin composition is cured by heating, irradiation with ionizing radiation, or the like. , May be completely cured. By doing so, the followability of the resin layer to the adherend becomes good, so that the moldability can be made good.
  • the thickness of the resin layer is preferably 0.5 to 30 ⁇ m, more preferably 1 to 20 ⁇ m, and further preferably 3 to 10 ⁇ m from the viewpoint of the balance between surface hardness and moldability.
  • the transparent substrate is mainly used when the resin sheet is manufactured by the method (A).
  • the transparent base material has optical transparency, smoothness, heat resistance, and excellent mechanical strength.
  • a transparent substrate include polyester, triacetyl cellulose (TAC), cellulose diacetate, cellulose acetate butyrate, polyamide, polyimide, polyether sulfone, polysulfone, polypropylene, polymethylpentene, polyvinyl chloride, polyvinyl acetal. , Polyetherketone, polymethylmethacrylate, polycarbonate, polyurethane and amorphous olefins (Cyclo-Olefin-Polymer: COP).
  • the transparent substrate may be a laminate of two or more plastic films.
  • polyesters polyethylene terephthalate, polyethylene naphthalate
  • TAC and acrylic are preferable from the viewpoint of light transmission and optical isotropy.
  • COP and polyester are preferable because they are excellent in weather resistance.
  • a plastic film having an in-plane retardation value of 3,000 to 30,000 nm or a plastic film having a quarter-wave retardation may cause unevenness of different colors to be observed on the display screen when observing an image on a liquid crystal display through polarized sunglasses. It is preferable in that it can be prevented.
  • the thickness of the transparent substrate is preferably 5 to 300 ⁇ m, more preferably 30 to 200 ⁇ m.
  • a physical treatment such as a corona discharge treatment or an oxidation treatment, or a coating called an anchor agent or a primer may be applied in advance.
  • the transparent base material is peeled from the resin layer after the step (A2) to form a resin layer single layer, it is preferable to use a transparent base material having releasability.
  • the second resin layer is a layer formed on the resin layer mainly for the purpose of adjusting the above formulas (1) and (2) when the resin sheet is manufactured by the method (A). .
  • the second resin layer preferably contains a cured product of the curable resin composition as a main component.
  • the main component means 50% by mass or more of the total solid content of the second resin layer, the ratio is preferably 70% by mass or more, more preferably 80% by mass or more, and 90% by mass. It is even more preferable that it is at least%.
  • the curable resin composition used for forming the second resin layer the same curable resin composition used for forming the resin layer can be used.
  • the thickness of the second resin layer is preferably 0.10 to 6.50 ⁇ m, more preferably 0.50 to 6.00 ⁇ m, and further preferably 0.70 to 5.50 ⁇ m.
  • the transfer layer is a layer formed on the adherend when the resin sheet is manufactured by the method (B).
  • Specific examples of the layer structure of the transfer layer include the above (Y1) to (Y6).
  • the embodiment of the composition and thickness of the resin layer included in the transfer layer is as described above.
  • the adhesive layer is disposed on the adherend side of the transfer layer and has a role of improving the adhesiveness between the adherend such as a resin molded body and the transfer layer and improving the transfer operation.
  • the adhesive layer it is preferable to use a heat-sensitive or pressure-sensitive resin suitable for the material of the adherend.
  • a heat-sensitive or pressure-sensitive resin suitable for the material of the adherend.
  • the adherend is made of acrylic resin, it is preferable to use acrylic resin.
  • the material of the adherend is polyphenylene oxide / polystyrene resin, polycarbonate resin, or styrene resin, acrylic resin, polystyrene resin, polyamide resin, polyester resin, etc., which have an affinity for these resins, etc. Is preferably used.
  • the material of the adherend is polypropylene resin, it is preferable to use chlorinated polyolefin resin, chlorinated ethylene-vinyl acetate copolymer resin, cyclized rubber or coumarone indene resin.
  • the adhesive layer preferably has heat sensitivity (heat sealability).
  • blend additives such as a ultraviolet absorber and an infrared absorber
  • the thickness of the adhesive layer is preferably 0.1 to 10 ⁇ m, more preferably 0.5 to 5 ⁇ m.
  • the anchor coat layer is a layer provided as necessary to improve heat resistance when placed in a high temperature environment such as in-mold molding.
  • the anchor coat layer is preferably formed between the resin layer and the adhesive layer.
  • the anchor coat layer preferably contains a cured product of the curable resin composition.
  • the curable resin composition for the anchor coat layer include the same curable resin compositions as those exemplified for the resin layer.
  • the thickness of the anchor coat layer is preferably 0.1 to 6 ⁇ m, more preferably 0.5 to 5 ⁇ m.
  • the antireflection layer is located on the side farthest from the adherend among the layers constituting the transfer layer.
  • the antireflection layer include a single layer structure of a low refractive index layer and a two layer structure of a high refractive index layer and a low refractive index layer (in the case of the two layer structure, the high refractive index layer is arranged on the adherend side).
  • the antireflection layer may be formed of three or more layers.
  • the refractive index of the low refractive index layer is preferably 1.28 to 1.40, more preferably 1.32 to 1.38.
  • the thickness of the low refractive index layer is preferably 80 to 120 nm, more preferably 85 to 110 nm, and further preferably 90 to 105 nm.
  • the method of forming the low refractive index layer can be roughly classified into a wet method and a dry method.
  • a wet method a method of forming by a sol-gel method using a metal alkoxide or the like, a method of forming by coating a resin having a low refractive index such as a fluororesin, and a resin composition containing low refractive index particles
  • a method of applying the coating liquid for forming the refractive index layer to form the coating liquid may be used.
  • the dry method include a method of selecting particles having a desired refractive index from the low-refractive index particles described later and forming them by physical vapor deposition or chemical vapor deposition.
  • the wet method is excellent in terms of production efficiency, and among the wet methods, it is preferable to form the coating liquid for forming a low refractive index layer containing a binder resin composition containing low refractive index particles.
  • a binder resin composition for example, the curable resin composition exemplified in the resin layer can be used.
  • the low-refractive-index particles can be used without limitation regardless of whether they are particles made of an inorganic compound such as silica and magnesium fluoride or particles made of an organic compound, but from the viewpoint of improving the antireflection property by lowering the refractive index. Therefore, particles having a structure having voids are preferably used.
  • the particles having a structure having voids have fine voids inside, and are filled with a gas such as air having a refractive index of 1.0, so that the particles themselves have a low refractive index.
  • the particles having such voids include inorganic or organic porous particles and hollow particles. For example, porous silica, hollow silica particles, or porous polymer particles using acrylic resin or the like. And hollow polymer particles.
  • the average particle diameter of the primary particles of the low refractive index particles is preferably 5 to 200 nm, more preferably 5 to 100 nm, still more preferably 10 to 80 nm.
  • the high refractive index layer preferably has a refractive index of 1.55 to 1.85, more preferably 1.56 to 1.70.
  • the thickness of the high refractive index layer is preferably 200 nm or less, more preferably 50 to 180 nm.
  • the high refractive index layer can be formed from, for example, a high refractive index layer coating liquid containing a binder resin composition and high refractive index particles.
  • a binder resin composition for example, the curable resin composition exemplified for the hard coat layer can be used.
  • antimony pentoxide (1.79), zinc oxide (1.90), titanium oxide (2.3 to 2.7), cerium oxide (1.95), tin-doped indium oxide (1. 95 to 2.00), antimony-doped tin oxide (1.75 to 1.85), yttrium oxide (1.87) and zirconium oxide (2.10).
  • the average particle size of the primary particles of the high refractive index particles is preferably 5 to 200 nm, more preferably 5 to 100 nm, still more preferably 10 to 80 nm.
  • the adherend examples include a molded body made of metal, glass, ceramics, resin or the like. Among these, the glass and the resin molded body that easily exhibit the effects of the present invention are preferable, and the resin molded body is more preferable.
  • the adherend may have a flat plate shape or a three-dimensional shape having a curved surface or the like. Further, the adherend may be colored.
  • the resin molded body is preferably formed from an injection moldable thermoplastic resin or thermosetting resin.
  • a thermoplastic resin for the resin molded body as the adherend.
  • thermoplastic resin include polystyrene resin, polyolefin resin, ABS resin (including heat-resistant ABS resin), AS resin, AN resin, polyphenylene oxide resin, polycarbonate resin, polyacetal resin, acrylic resin, Examples thereof include polyethylene terephthalate resin, polybutylene terephthalate resin, polysulfone resin, and polyphenylene sulfide resin.
  • a polycarbonate resin having good impact resistance is preferable.
  • the thickness of the adherend is not particularly limited and may be appropriately determined according to the application.
  • the resin sheet is used as the front plate of the display element, it is preferably 0.3 to 5.0 mm, more preferably 1.0 to 2.5 mm, from the viewpoint of the balance between strength and thinning. .
  • the resin sheet may have other layers such as an antifouling layer, a printing layer and an antistatic layer.
  • the resin sheet of the present invention can be used, for example, as a front plate of a display element.
  • the display element include a liquid crystal display element, an EL (inorganic EL, organic EL) display element, a plasma display element, an LED display element (micro LED, etc.), and the like.
  • the liquid crystal display element may be an in-cell touch panel liquid crystal display element having a touch panel function inside the element.
  • the transfer sheet of the present invention has a transfer layer on a release sheet, and the transfer layer has an uneven region on the surface in contact with the release sheet, and satisfies the following Condition 1.
  • ⁇ Condition 1> After the surface of the transfer sheet on the transfer layer side is attached to a transparent plate having an internal haze of 0%, the release sheet is peeled off, and a sample A is produced by transferring the transfer layer onto the transparent plate. .
  • the internal haze of the portion having the concavo-convex region of the sample A is 3.0% or less, and the arithmetic mean roughness of JIS B0601: 1994 when the cutoff value ⁇ c of the concavo-convex region of the sample A is 0.8 mm.
  • Ra1 and Sm1 are defined by the following formulas (1) and (2) when Sm1 is defined as the average interval of the unevenness of JIS B0601: 1994 when the cutoff value ⁇ c of the unevenness area of Ra1 and sample A is 0.8 mm. ) Is satisfied.
  • FIG. 4 is a sectional view showing an embodiment of the transfer sheet 300 of the present invention.
  • the transfer sheet 300 of FIG. 4 has the transfer layer 100 on the release sheet 70.
  • the release sheet 70 is composed of a support 71, an uneven layer 72, and a release layer 73, and the surface of the transfer layer 100 that is in contact with the release sheet 70 is adjacent to the uneven area A1 ′ and the uneven area A1 ′. Smooth area A2 '.
  • the transfer layer 100 has a resin layer 10, an anchor coat layer 20, and an adhesive layer 30 from the release sheet side.
  • condition 1 of the transfer sheet of the present invention the technical idea of defining the ranges of internal haze, Ra1 ⁇ Sm1 and Ra1 is the technique of defining the internal haze, Ra1 ⁇ Sm1 and Ra1 ranges in the resin sheet of the present invention described above. It is similar to the idea.
  • the surface shape and optical characteristics of the sample A produced from the transfer sheet are preferably in the same range as the preferable range of the surface shape and optical characteristics of the resin sheet described above.
  • the average inclination angle ⁇ a1 of the concavo-convex region is preferably 0.50 degrees or more, and Ra1 [ ⁇ m] / Sm1 [ ⁇ m] / ⁇ a1 (degrees) is 1.30 ⁇ 10 ⁇ 3 or more. It is preferable. Further, it is preferable that the sample A has a smooth region adjacent to the uneven region on the one surface.
  • the release sheet has a concavo-convex region on the surface in contact with the transfer layer.
  • the release sheet is peeled off after transferring the transfer layer to an adherend such as a resin molded body, and a shape complementary to the surface shape of the release sheet is formed on the surface of the transfer layer ( ⁇ surface of the resin sheet). It That is, the surface shape of the release sheet has a complementary relationship with the surface shape of the resin sheet.
  • the surface irregularities of the release sheet and the surface irregularities of the resin sheet are positive and negative, but they are substantially the same when the arithmetic average roughness Ra and the average interval Sm of the irregularities are set.
  • the arithmetic mean roughness Ra and the average spacing Sm of the concavities and convexities of the concavo-convex area of the release sheet and the arithmetic mean roughness Ra and the average spacing Sm of the concavities and convexities of the concavo-convex area of the resin sheet obtained from the transfer sheet are substantially the same. .
  • the release sheet 70 preferably has a support 71, an uneven layer 72, and a release layer 73, as shown in FIG.
  • Condition 1 can be easily satisfied, and Ra1 [ ⁇ m] / Sm1 [ ⁇ m] / ⁇ a1 (degrees) can be easily set within the above range.
  • the release sheet may have a single-layer structure of a support, a two-layer structure of a support and a concavo-convex layer, or a support and a concavo-convex layer, as long as the effects of the present invention are not impaired.
  • a layer other than the release layer may be included.
  • the other layer include an antistatic layer.
  • polyolefin resins such as polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer and other vinyl-based resins Resins, polyester resins such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate, acrylic resins such as poly (meth) acrylate and ethyl poly (meth) acrylate, styrene resins such as polystyrene, nylon 6 or nylon
  • a plastic film made of a resin such as a polyamide resin represented by 66 or the like can be given.
  • a biaxially stretched polyester film is preferable because it has excellent heat resistance and dimensional stability, and has excellent suitability for alignment during transfer.
  • the thickness of the support is preferably 12 to 150 ⁇ m, more preferably 25 to 100 ⁇ m, from the viewpoints of moldability, shape conformability and handling. Further, the surface of the support may be preliminarily subjected to an easy-adhesion treatment in order to enhance the adhesiveness with the uneven layer and the like.
  • the uneven layer preferably contains a cured product of the curable resin composition as a main component.
  • the main component means 50% by mass or more of the total solid content of the concavo-convex layer, the ratio is preferably 70% by mass or more, more preferably 80% by mass or more, and 90% by mass or more. Is more preferable.
  • the curable resin composition used for the concavo-convex layer the same curable resin composition as exemplified for the resin layer can be used.
  • the thickness of the uneven layer is not particularly limited, but it is preferably 1 to 15 ⁇ m, more preferably 2 to 12 ⁇ m.
  • the release layer is preferably composed mainly of resin.
  • the resin of the release layer is not particularly limited as long as it is a material having a predetermined film strength and low adhesion to the transfer layer, a general-purpose thermoplastic resin, a cured product of a thermosetting resin composition, and ionizing radiation. Examples include cured products of curable resin compositions. Specifically, fluorine resin, silicone resin, acrylic resin, polyester resin, polyolefin resin, polystyrene resin, polyurethane resin, cellulose resin, vinyl chloride-vinyl acetate copolymer resin, nitrified cotton. Etc. Among these, a cured product of the thermosetting resin composition is preferable, and a thermosetting resin composition containing an acrylic polyol and an isocyanate is more preferable.
  • the release layer may further contain a release agent in order to improve releasability.
  • a release agent include waxes such as synthetic wax and natural wax.
  • the synthetic wax a polyolefin wax such as polyethylene wax or polypropylene wax is preferable.
  • the thickness of the release layer is preferably 0.10 to 6.50 ⁇ m, more preferably 0.50 to 6.00 ⁇ m, and further preferably 0.70 to 5.50 ⁇ m. By setting the thickness of the release layer in the above range, Condition 1 can be easily satisfied.
  • the release sheet can be produced, for example, by the steps (B0-1) to (B0-3) described above.
  • Transfer layer forming the transfer sheet examples include the layer structures (Y1) to (Y6) described above.
  • the image display device of the present invention is an image display device having a display element and a front plate disposed on the light emitting surface side of the display device, wherein the resin sheet of the present invention described above is used as the front plate, It is arranged such that the surface on the side provided with the concave-convex region faces the side opposite to the display element.
  • the display element examples include a liquid crystal display element, an EL display element (organic EL display element, inorganic EL display element), a plasma display element, and the like, and further an LED display element such as a micro LED display element.
  • the liquid crystal display element may be an in-cell touch panel liquid crystal display element having a touch panel function inside the element.
  • the display element of the display device is a liquid crystal display element
  • a backlight is required on the surface of the liquid crystal display element opposite to the resin sheet.
  • the image display device of the present invention may be an image display device with a touch panel.
  • the touch panel include resistance film type, capacitance type, electromagnetic induction type, infrared type, ultrasonic type and the like.
  • the distance from the light emitting surface of the display element to the surface of the resin sheet on the side where the concave and convex regions are provided is 2.0 mm or more.
  • the distance is more preferably 2.0 to 10.0 mm, further preferably 2.0 to 5.0 mm.
  • the difference between the refractive index of the resin and the refractive index of the transparent adhesive, and the difference between the refractive index of the transparent adhesive and the refractive index of the TAC film were 0.01 or less.
  • the haze of the portion of the produced sample corresponding to the concavo-convex area was measured to determine the internal haze of the resin sheet at the portion having the concavo-convex area.
  • the light incident surface during the haze measurement was on the adherend side (transparent acrylic plate side).
  • a haze meter (HM-150, manufactured by Murakami Color Research Laboratory) was used as a measuring device. Also for the surface protection sheet of Reference Example, the total haze, the total light transmittance, and the internal haze were similarly measured.
  • a black plate was attached to the adherend side (transparent acrylic plate side) of the antiglare resin sheet and the transparent substrate side of the surface protective sheet of the reference example via a transparent adhesive to prepare a sample.
  • the sample was placed on a horizontal surface, a fluorescent lamp was placed 1.5 m above the sample, and the sample was observed from various angles in an environment where the illuminance on the sample was 800 to 1200 Lx, and evaluated according to the following criteria.
  • AA The image of the fluorescent lamp cannot be recognized in the uneven area from any angle.
  • A The image of the fluorescent lamp is reflected in the uneven area, but the outline of the fluorescent lamp is blurred and the boundary portion of the outline cannot be recognized.
  • C The image of the fluorescent lamp is reflected in the uneven area like a mirror surface, and the outline of the fluorescent lamp (boundary of the outline) can be clearly recognized.
  • a resin sheet or a surface protection sheet of the reference example is arranged on a glittering liquid crystal display device (trade name iPad (registered trademark) Air made by Apple Inc., resolution: 264 ppi), and the screen of the liquid crystal display device is displayed in green with bright spots. It was visually evaluated whether it was conspicuous.
  • the evaluation environment was a bright room environment (the environment in which the illuminance on the resin sheet was 800 to 1200 Lx when the liquid crystal image display device was powered off). 20 subjects evaluated the product as having no glare, 2 points, one with no glare, and 0 having a strong glare, and the average was calculated and evaluated according to the following criteria.
  • C Average score is more than 0.5 and 1.0 or less
  • D Average score is 0.5 or less
  • Image clarity A resin sheet or a surface protection sheet of a reference example is placed on a liquid crystal display device (trade name: iPad (registered trademark) Air made by Apple Inc., resolution: 264 ppi), and a still image is displayed on the screen of the liquid crystal display device. Then, it was visually evaluated whether or not the outline of the image was clearly visible.
  • the evaluation environment was a bright room environment (the environment in which the illuminance on the resin sheet was 800 to 1200 Lx when the liquid crystal image display device was powered off). In this evaluation, the distance from the light emitting surface of the display element to the surface of the resin sheet on which the concave and convex regions are provided is a little over 2 mm.
  • Plates 2 to 4 were produced in the same manner as plate 1 except that the average particle diameter of abrasive particles, the injection pressure, and the distance between the injection nozzle and the workpiece were changed to those shown in Table 1 among the sandblast conditions.
  • release sheet 1 On the surface of the polyethylene terephthalate film (support) having a thickness of 50 ⁇ m, which had been subjected to the easy-adhesion treatment, a coating solution for forming an uneven layer having the following formulation was applied and dried to form an uncured coating film.
  • a release layer-forming coating liquid having the following formulation was applied on the entire surface of the uneven layer, dried and cured to form a release layer, and thus a release sheet 1 was obtained.
  • the release sheet 1 and release sheets 1 to 6 to be described later had a configuration in which a concavo-convex region A1 ′ was arranged in the center and a smooth region A2 ′ was arranged in the peripheral part.
  • ⁇ Release layer forming coating liquid> Acrylic polyol 70 parts ⁇ Isocyanate 25 parts ⁇ Ethyl acetate 161 parts ⁇ Methyl isobutyl ketone 56 parts
  • Release Sheets 2 to 6 were obtained in the same manner as Release Sheet 1 except that the coating amounts of the plate and the release layer were changed to the values shown in Table 1.
  • the value obtained by multiplying the coating amount (g / m 2 ) of the release layer by 1.4 is the approximate thickness of the release layer.
  • the thickness of the release sheet 1 is about 5.6 ⁇ m.
  • a coating solution for forming an anchor layer having the following formulation was applied on the resin layer so that the amount of adhesion after drying was 3.0 g / m 2 , dried to form a coating film, and then aged at 40 ° C. for 72 hours. Then, it was cured to form an anchor layer having a thickness of 2 ⁇ m.
  • a coating liquid for forming an adhesive layer having the following formulation was applied onto the anchor layer so that the amount of adhesion after drying was 2.5 g / m 2 to form a coating film.
  • the coating film was dried to form an adhesive layer having a thickness of 2 ⁇ m, and the transfer sheet of Example 1 was obtained.
  • the refractive index of the adhesive layer was 1.49.
  • ⁇ Coating liquid for adhesive layer> Acrylic resin 100 parts (solid content 20%) (Ethyl acetate / acetic acid-n-propyl / methyl ethyl ketone mixed solvent) ⁇ Methyl ethyl ketone 40 parts
  • a transfer sheet is superposed on a transparent acrylic sheet having a thickness of 2 mm, which is an adherend, with the surface of the adhesive layer facing the adherend side, and heat-pressed from the support side of the transfer sheet. And the transfer sheet were brought into close contact with each other and laminated.
  • the resin layer was completely cured by irradiation with ultraviolet rays (in the air, H bulb, 800 mJ / cm 2 ), and the resin sheet of Example 1 was obtained. Obtained.
  • Reference Examples 1-2 A surface protection sheet for a commercially available image display device was prepared.
  • the surface protection sheets of Reference Examples 1 and 2 have an uneven layer containing a binder resin and particles on a transparent substrate.
  • Resin layer 20 Anchor coat layer 30: Adhesive layer 50: Transparent base material 70: Release sheet 71: Support 72: Uneven layer 73: Release layer 100: Transfer layer 200: Adherent 300: Transfer sheet 1000: Resin sheet

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  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Manufacturing & Machinery (AREA)
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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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  • Optical Elements Other Than Lenses (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

L'invention concerne une feuille de résine qui supprime l'éblouissement tout en supprimant une baisse de la clarté d'image, et qui peut conférer une propriété antireflet. La présente feuille de résine comprend une région irrégulière sur une de ses surfaces : le trouble interne de la zone dans laquelle se trouve la région irrégulière étant inférieur ou égal à 3,0 % ; et, lorsque Ra1 est défini en tant que la rugosité moyenne arithmétique selon la norme JIS B0601:1994 lorsque la valeur de coupure λc de la région irrégulière est de 0,8 mm, et que Sm1 est défini comme étant l'intervalle moyen entre un évidement et une saillie selon la norme JIS B0601:1994, lorsque la valeur de coupure λc de la région irrégulière est de 0,8 mm, Ra1 et Sm1 satisfaisant la formule (1) et la formule (2). (1) : Ra1 [μm] × Sm1 [μm] ≤ 5,00, (2) : 0,050 [µm] ≤ Ra1
PCT/JP2019/040153 2018-10-11 2019-10-11 Feuille de résine et dispositif d'affichage d'image l'utilisant, ainsi que feuille de transfert WO2020075835A1 (fr)

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US11447643B2 (en) * 2018-08-02 2022-09-20 Benq Materials Corporation Hard coating layered optical film, polarizer comprising the same, and image display comprising the hard coating layered optical film and/or the polarizer comprising the same
WO2023090300A1 (fr) * 2021-11-19 2023-05-25 株式会社トッパンＴｏｍｏｅｇａｗａオプティカルフィルム Stratifié optique et dispositif d'affichage d'image l'utilisant
WO2023153492A1 (fr) * 2022-02-10 2023-08-17 株式会社 潤工社 Élément de transmission/diffusion de lumière et unité de source de lumière l'utilisant
WO2024048407A1 (fr) * 2022-08-31 2024-03-07 三菱瓦斯化学株式会社 Stratifié antireflet
JP7492371B2 (ja) 2020-05-08 2024-05-29 リケンテクノス株式会社 低屈折率ｂステージ塗膜、積層フィルム、三次元成形体、及びこれらの製造方法

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JP2003205564A (ja) * 2002-01-15 2003-07-22 Dainippon Printing Co Ltd 反射防止機能付き帯電防止転写箔
JP2008158536A (ja) * 2005-06-28 2008-07-10 Nitto Denko Corp 防眩性ハードコートフィルム
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JPH09127312A (ja) * 1995-10-27 1997-05-16 Tomoegawa Paper Co Ltd 防眩材料及びそれを使用した偏光フィルム
JP2003205564A (ja) * 2002-01-15 2003-07-22 Dainippon Printing Co Ltd 反射防止機能付き帯電防止転写箔
JP2008158536A (ja) * 2005-06-28 2008-07-10 Nitto Denko Corp 防眩性ハードコートフィルム
JP2010015109A (ja) * 2008-07-07 2010-01-21 Sony Corp 光学フィルムおよびその製造方法、防眩性偏光子、ならびに表示装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11447643B2 (en) * 2018-08-02 2022-09-20 Benq Materials Corporation Hard coating layered optical film, polarizer comprising the same, and image display comprising the hard coating layered optical film and/or the polarizer comprising the same
JP7492371B2 (ja) 2020-05-08 2024-05-29 リケンテクノス株式会社 低屈折率ｂステージ塗膜、積層フィルム、三次元成形体、及びこれらの製造方法
WO2023090300A1 (fr) * 2021-11-19 2023-05-25 株式会社トッパンＴｏｍｏｅｇａｗａオプティカルフィルム Stratifié optique et dispositif d'affichage d'image l'utilisant
WO2023153492A1 (fr) * 2022-02-10 2023-08-17 株式会社 潤工社 Élément de transmission/diffusion de lumière et unité de source de lumière l'utilisant
WO2024048407A1 (fr) * 2022-08-31 2024-03-07 三菱瓦斯化学株式会社 Stratifié antireflet

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