TW201139637A - Resin sheet - Google Patents

Abstract

The present invention provides a resin sheet. By means of coating a solution containing 0.001 mass% to 0.07 mass% of antistatic agent in 500 mg/m<2> to 2000 mg/m<2> onto the bottom surface 75 and/or the upper surface 76 of a resin sheet 53 and drying the same, a resin sheet 53 with an antistatic layer containing 0.02 mg/m<2> to 1 mg/m<2> of the antistatic agent is obtained. Thus, when the resin sheet 53 is used as a light diffusion plate 10, the surface contamination of the light diffusion plate 10 caused by the movement of the antistatic agent can be inhibited. Also, uneven adhesion in the assembly for use of the light diffusion plate 10 and an optical membrane 4 can be inhibited.

Description

201139637 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a resin sheet. [Prior Art] As a method of irradiating a liquid crystal display device, a light reflecting plate including a resin sheet is used, and specifically, a plurality of light sources (cold cathode tube, LED (Light Emitting Diode)) A direct type liquid crystal display device in which a light diffusing plate or a liquid crystal panel is disposed in front of the front side is known. For a direct type liquid crystal display device, it is desired to maintain a high brightness&apos; and to eliminate the image of the light source to provide a uniform image. In recent years, in response to the demand for further increase in brightness and uniformity of images, the following measures have been taken to provide fine unevenness on the surface of the light diffusing plate or to provide a diffusion film between the light diffusing plate and the liquid crystal panel. An optical film such as a enamel film or a brightness enhancement film. On the other hand, the light-diffusing sheet is mainly a sheet containing a resin such as a polystyrene resin (Methylstyrene) resin, and thus there is a problem that dust or the like adheres to the surface thereof due to charging. The adhesion of dust to the light diffusing plate causes the display of the quality or brightness to be particularly steep. Therefore, various countermeasures for imparting antistatic performance to the light diffusing plate have been proposed. For example, a method of producing an acrylic resin film in which a polymer type antistatic agent is mixed in a resin and thermally bonding the film to a light diffusion plate has been proposed (for example, refer to Japanese Patent Laid-Open Publication No. 2009-84521) . There is a method in which a surfactant, a conductive microparticle 3 antistatic agent is dissolved or dispersed in a resin or a solvent to prepare a resin mixture. 153040.doc 201139637 Liquid 'This solution is applied to a substrate film, and The transfer film containing an antistatic agent is formed by drying, and the transfer film is transferred from the base film to the light diffusion plate (for example, refer to International Publication No. 2007-52579). Also, a method of applying an aqueous solution containing a surfactant to a surface of a light diffusing plate formed using a polyethylene resin, followed by drying to carry a surfactant on the light diffusing plate, for example, Japan Japanese Patent Publication No. 2007-178544 also discloses an example in which an antistatic agent is carried on a light diffusing plate in a carrying amount in the range of 〇1 g/m2 to 1〇g/m2. The method of the Japanese Patent Laid-Open Publication No. 2009-84521 and the International Publication No. 2_052579 manual is a method of mixing an antistatic agent into a resin. Therefore, in order to sufficiently obtain an antistatic effect by these methods, a relatively large amount of an antistatic agent is required. That is, these methods are not economical. On the other hand, if the amount of the antistatic agent added is increased in order to obtain a sufficient antistatic effect, the antistatic agent may easily bleed out, resulting in surface contamination or deterioration of optical characteristics of the light diffusing plate. Further, it is necessary to carry out the steps of producing a film containing an antistatic agent, and further bonding the film to the light diffusing plate ± (4), so that the number of steps is increased and it is uneconomical. The light-diffusing sheet obtained by the method of Japanese Laid-Open Patent Publication No. 2007-178544 is placed under the shape of a liquid crystal display device, and the antistatic agent moves when it comes into contact with the optical film, which is easy to produce and optical. The film is not evenly connected to the ground. As a result, the display of the image appears uneven, so that the display characteristics are degraded. An object of the present invention is to provide a resin sheet which can be used as a light-diffusing sheet and which can suppress the occurrence of unevenness in adhesion when the light-diffusing sheet and the optical film are used in combination in 153040.doc 201139637. Further, another object of the present invention is to provide a light diffusing plate formed using the above resin sheet. Further, another object of the present invention is to provide a surface light source device and a liquid crystal display device including the above-described light diffusing plate. Further, another object of the present invention is to provide a method for producing a resin sheet which can economically produce the above resin sheet. In order to achieve the above object, the resin sheet of the present invention comprises a resin layer and an antistatic agent layer containing an antistatic agent of 〇〇2 mg/m2 formed on the resin layer. The resin sheet of the present invention may be provided with an antistatic agent layer containing an antistatic agent of 〇·〇 2 mg/m 2 to 1 mg/m 2 on only one side of the resin layer, or may be provided on both sides of the resin layer. When the resin sheet of the present invention is provided with an antistatic agent layer containing an antistatic agent of 〇.〇2 mg/m2 on one side of the resin layer, it may have an underfill on the other side of the resin layer. The antistatic agent layer of the antistatic agent in an amount of mg/m or more than 1 mg/m2 may not have the antistatic agent layer at all on the other surface. The surface resistivity of the above antistatic agent layer is preferably 1 χ 1 〇 9 Ω / □ 1 / 1 &lt; 1 〇丨 4 卩 / port. The above antistatic agent preferably contains a cationic surfactant. The molecular weight of the above cationic surfactant is preferably from 1 〇〇 to 1 〇〇〇. The above cationic surfactant preferably contains an ammonium salt represented by the formula (1). 153040.doc 201139637 [化i] R1 (1) R2 - R4X~

I R3 :() wherein R1 R4 represents a linear chain of a hydrogen atom, a branched group of carbon atoms of 3 to 22, or an extracardiac. Further, X·tablet, ion t plasma ion, sulfate ion, can acid ion, ion represented by formula (7) or ion represented by formula (3). [化2] 0

D R5 - 〇- s - ... 2, BV ; 0 弋 (2) R5 knife is not a hydrogen atom, a carbon atom, a linear alkyl group of 22, a branched alkyl group having 3 to 22 carbon atoms or - CH2Ph. [Chemical 3] 〇βΖ-〇~ --〇) 0 0 In the formula (3), Z represents a fang atom. Moreover, the present invention provides a surface light source device comprising: a light box made of resin opened in front, a light source arranged to be spaced apart from each other in the optical box so as to face the front surface; and the above-mentioned front surface and the above The light source is opposite to the light diffusing plate. The above light diffusing plate is obtained by cutting the resin sheet of the present invention. Further, the present invention provides a liquid crystal display device comprising the above-described surface light source device of the present invention and a liquid crystal panel disposed in front of the liquid crystal display device. The liquid crystal display device may further include an optical film disposed between the light diffusing plate and the liquid crystal panel. It is preferable that at least one side of the optical film has a surface resistance value of IX1013 Ω/□ or more. In the case of such an optical film, the light diffusing plate is provided with an antistatic agent layer containing an antistatic agent of 〇.〇2 mg/m2 to 1 mg/m2 on the side opposite to the optical film. The light diffusing plate may not have an antistatic agent layer on the side opposite to the light source. However, it is preferable to have an antistatic agent layer on the side opposite to the light source. The antistatic agent layer preferably contains less than the antistatic agent layer. 〇.〇2 mg/m2 or 〇.〇2 mg/m2~1 mg/m2 of antistatic agent, more preferably containing more than i mg/m2 of antistatic agent. Further, the present invention provides a method for producing a resin sheet, comprising the steps of: applying a solution containing 0.001% by mass to 0.07% by mass of an antistatic agent to at least one surface of a resin layer; The above resin layer of the solution is dried; and the coating amount of the above solution is 5 〇〇mg/m 2 〜 2 〇〇〇 mg/m 2 〇 The resin sheet of the present invention is formed with an antistatic agent at least on one surface thereof. Antistatic agent layer, so it has antistatic properties. Further, the antistatic agent layer contains an antistatic agent of 0.02 mg/m2 to 1 mg/m2. Therefore, when the resin sheet is used as a light diffusion plate, the light diffusion plate caused by the movement of the antistatic agent can be prevented. Surface contamination. Further, in the surface light source device of the present invention, the light-diffusing sheet is formed by using the resin sheet of the present invention, I53040.doc * 8 - 201139637, so that the unevenness of the adhesion between the light-diffusing sheet and the optical film can be suppressed. That is, it is convenient to arrange the optical film on the light diffusion plate, and it is also possible to suppress the unevenness of the light diffusion plate and the optical film. As a result, unevenness in display can be suppressed, and high-quality light can be obtained. Further, in the liquid crystal display device of the present invention, since the light diffusing plate of the surface light source device is formed of the resin sheet of the present invention, even if an optical film is disposed between the light diffusing plate and the liquid crystal panel, the light diffusing plate can be suppressed. The adhesion to the optical film is not uniform. As a result, unevenness in display can be suppressed, and high-quality light can be obtained. Further, the method for producing a resin sheet of the present invention is a method in which a solution containing an antistatic agent is applied to at least one surface of a resin layer and then dried. Thus, a resin sheet can be economically produced. Further, a solution containing an antistatic agent of 〇.〇〇1 mass% to 07 mass% is applied onto the resin layer in an amount of 500 mg/m2 to 2000 mg/m2. Therefore, when the obtained resin sheet is used as a light diffusing plate, surface contamination of the light diffusing plate caused by the movement of the antistatic agent can be suppressed. Further, it is possible to suppress uneven adhesion when the light diffusing plate and the optical film are used in combination. [Embodiment] <Overall Configuration of Liquid Crystal Display> FIG. 1 is a schematic side view of a liquid crystal display according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of a liquid crystal display according to an embodiment of the present invention. The liquid crystal display 1 as a liquid crystal display device is a so-called direct-lit type liquid crystal display, and includes a backlight system 2 as a surface light source device, a liquid crystal panel 3 disposed in front of the backlight system 2 (front side), and a backlight system 2 153040. .doc 201139637 Optical film 4 between the liquid crystal panel 3. In addition, in FIG. 1 and FIG. 2, for the sake of convenience, the liquid crystal display 1, the backlight system 2, the liquid crystal panel 3, etc. which are shown in the figure which shows the liquid crystal display 1 degree and the following in the front side of the paper surface side are shown. The scales of the constituent members are separately set for convenience of explanation, and the scales of all the constituent members are not necessarily the same. The backlight system 2 includes a square-shaped rear wall 5 and a four-frame-shaped side wall 6 that is integrally erected from the periphery of the rear wall 5 toward the front, and a thin box-shaped resin light box 7 that is open at the front; a plurality of linear light sources 8 in 7; and a light diffusing plate 10 blocking the open surface 9 (front surface) of the light box 7. Namely, the box-shaped light box 7 has a contour of the open surface 9 formed by the square-shaped side walls 6 and a linear light source 8 is provided in a space surrounded by the side walls 6 and the rear wall 5. On the inner surface of the rear wall 5 of the optical box 7, for example, a reflecting plate (not shown) for reflecting light incident from the linear light source 8 toward the rear wall 5 side toward the open surface 9 side of the case is integrally mounted. The linear light source 8 is, for example, a cylindrical lamp having a diameter of 2 mm to 4 mm. The plurality of linear light sources 8 are arranged at equal intervals in parallel with each other in a state in which the back surface (the main surface 18 to be described later) of the light diffusing plate 1 is spaced apart by a predetermined interval. Further, as the linear light source 8, for example, a known tubular lamp such as a fluorescent tube (cold cathode tube), a sigma lamp, or a xenon lamp can be used. Further, as the light source of the backlight system 2, a point light source such as a light-emitting diode (LED) or the like may be used instead of the linear light source 8. The liquid crystal panel 3 includes a liquid crystal cell 11 and a pair of polarizing plates 12 and 13 which are moxibustion liquid crystal cells 11 on both sides in the thickness direction. The liquid crystal panel 3 is disposed in front of the backlight system 2 such that the polarizing plate 13 (the polarizing plate on the rear side) of the 153040.doc 201139637 is opposed to the light diffusing plate 1A. As the liquid crystal cell 11, for example, TFT (Thin Film can be used)

A known liquid crystal cell such as a TranS1 St r 'thin film transistor type liquid crystal cell or an STN (Super Twisted Nematic ') liquid crystal cell. The optical film 4 is not particularly limited, and for example, it does not have an antistatic property b (for example, does not contain an antistatic agent), and the surface of the side of the light diffusing plate 1 (the surface opposite to the light diffusing plate) The resistance value (for example, based on jis κ69 ΐι) is, for example, 1 χ 1 〇ΐ 3 Ω / □ or more, preferably 1 χ 1 〇 π Ω / □ ~ ΐχΐ〇 1 δ ... film specific 5, can be used with the above surface resistance value Diffusion film, multi-mirror film &amp; type polarization separation film, retardation film, polarizing film, and the like. The diffusion film is not particularly limited, and examples thereof include a film in which beads are fixed to the surface of the transparent resin film by a binder. The ruthenium film is diffused in the light-diffusing sheet 1 并且 and the transmitted transmitted light is condensed toward the normal direction, thereby illuminating the front side with a higher brightness, for example, as opposed to the light-diffusing sheet 1G. On the opposite side of the surface, the entire surface is covered with a fine 稜鏡 lens, a fine convex lens, a sheet of a fine concentrating lens such as a lenticular lens, or the like. As a commercial product of the ruthenium film, for example, "BEF (Brightness) manufactured by Sumitomo Corporation

Enhancement F丨lm)" (trade name), a factory manufactured by Sekisui Film Co., Ltd. (4) na" ("1" ADF film" (trade name) manufactured by the company, and a reflective polarized separation film system For a certain kind of polarized light transmission, the property of reflecting the polarized light having the opposite nature of the direct reflection may be, for example, a linear polarized light transmitting the direction of the 153040.doc -11-201139637, and a vibration direction orthogonal to the direction. a reflective linear polarized light separation film that is linearly polarized and reflected, a circularly polarized light separation film that transmits circularly polarized light in a specific rotational direction, and a circularly polarized light that rotates in a direction opposite to the rotational direction. For example, "DBEF (Dual Brightness Enhancement Film)" (product name) manufactured by Sumitomo 3M Co., Ltd., "NIPOX" (trade name) manufactured by Mindong Electric Co., Ltd., etc., etc. The retardation (delay) is caused by the extension of the resin film, and examples thereof include a polycarbonate resin film, a polysulfone resin film, and a polyether sulfone system. A lipid film, a polyarylate-based resin film, a norbornene-based resin film, etc. As a commercial product of a retardation film, for example, "Elmec" (trade name) manufactured by Kaneka Co., Ltd., manufactured by Sumitomo Chemical Co., Ltd. "Sumikalite" (trade name), etc. The polarizing film is, for example, subjected to elongation processing of polyacetal alcohol or by dyeing with moth or dichroic dye, so that the vortex or dichroic dye adsorbs the alignment, and the vibration direction is The linearly polarized light in which the alignment direction is orthogonal, and the linearly polarized light having the same direction of vibration and the direction of the alignment is absorbed. As a commercial product of the polarizing film, for example, "NpF" (trade name) manufactured by Mindong Electric Co., Ltd., and Sumitomo Chemical Co., Ltd. RSumikalan (trade name) manufactured by the company, etc. &lt;Configuration of light diffusing plate&gt; Fig. 3 is a schematic perspective view of a light diffusing plate. Fig. 4 is a view showing a light box in a state in which a light diffusing plate is mounted on a light box. In the enlarged cross-sectional view of Fig. 3, the light diffusing plate 1 is formed into a plate shape substantially the same as the shape of the frame 153040.doc 201139637 of the side wall 6 of the optical box 7. The loose plate 10 is a two-layer light diffusing plate in which two resin layers are laminated in the thickness direction, and has a relatively thick base material layer 14 and a relatively thin back surface layer 15. The base of the light diffusing plate 10 is provided. On the main surface 16 on the side of the material layer 14 (the main surface on the front side), a plurality of semicircular convex portions 17 having a cylindrical lens shape extending between the opposite sides of the light diffusing plate 1 ' are formed in a strip shape. The semicircular convex portion 17 of the lens shape has a substantially semi-arc-shaped contour on the cut surface orthogonal to the longitudinal direction thereof, and the plurality of semicircular convex portions 17 are spaced apart from each other by an equal interval E! (for example, 1 pm to 1) Configured with 5 μηι). The distance (pitch Ρ) between the centers of the adjacent semicircular projections 17 is, for example, 1 〇 μπι to 500 μηη. Further, the ratio (ha/P!) of the height ha of the semicircular convex portion 17 with respect to the pitch I is, for example, 〇.2 to 0.8. On the other hand, a plurality of fine concavities and convexities 19 are formed by embossing on the main surface 18 (main surface on the back side) on the side of the back surface layer 15 of the light diffusing plate 1A. The fine unevenness 19 is distributed substantially uniformly over the entire main surface 18 on the side of the back surface layer 15, and the main surface 18 on the side of the back surface layer 15 is set to a rough surface on which the fine unevenness 19 is formed on the entire surface. The shape of the fine unevenness 19 can be expressed, for example, by the roughness of the surface. As an example, the arithmetic mean roughness Ra (based on JIS B 〇 6 〇 1 2 〇〇 1) of the fine unevenness 19 is 0.8 μηι to 5.0 μηη. Further, the ten-point average roughness RZ of the fine unevenness 19 (based on JISB0601-2001) is 8. 111卜111~3〇〇^1111. Further, the average interval Rsm (based on JIS B〇6〇12〇〇1) of the fine unevenness 19 is 1 〇〇μηι to 400 μηη, and as shown in Fig. 4, the thickness q of the base material layer 14 and the back surface are Thickness of layer 153 153040.doc • 13- 201139637 The total thickness T of the light diffusing plate 10 added by t2 is, for example, 0.1 mm to 10 mm. Further, the thickness of the substrate layer 14 is, for example, 0.05 mm to 9 mm. Further, the thickness t2 of the back layer 15 is, for example, 0.03 mm to 1 mm. The raw material of the light diffusing plate 10 is not particularly limited, and for example, a known light transmitting resin can be used. Examples of the light-transmitting resin include acrylic resin, styrene resin, polycarbonate, polyethylene, polypropylene, cyclic polyolefin, cyclic olefin copolymer, polyethylene terephthalate, and Ms. Resin (methyl methacrylate-stuppyrene copolymer resin), ABS resin (acrylonitrile-butadiene-styrene copolymer resin), AS resin (acrylonitrile-styrene copolymer resin), and the like. These light-transmitting resins may be used singly or in combination of two or more. Further, among these, a styrene resin is preferred, and a styrene resin is preferably used alone. Further, the resin (4) used as a raw material of the base layer layer may be the same as or different from the resin (?) used as a raw material of the back surface layer 15. The combination of (4) and the resin (Β) is preferably a combination of the same type of permeable resin, and more preferably a combination of the styrene resin (8) and (Β), particularly preferably The resins (Α) and (Β) are each a combination of styrene-based resins. Further, the light diffusing plate 10 may contain a light diffusing agent (light diffusing particles as a light diffusing agent, and the refractive index of the light diffusing film is different from that of the light diffusing plate constituting the light diffusing plate), and may diffuse and transmit the light particles. There is no particular limitation. For example, 'as an inorganic light diffusing agent', carbon_, barium sulfate, oxygen 153040.doc •14·201139637 aluminum hydroxide, cerium oxide, glass, talc, mica, white carbon, oxygen town ^ Zinc and so on. These may also be those subjected to surface treatment with fatty acids or the like. For example, examples of the light diffusing agent of the organic type include styrene-based polymer particles, acrylic polymer particles, and stone oxide (tetra) polymer particles. The weight average molecular weight is 500,000. 5 million points high. The child is gathered. The particle fraction or the gel fraction when dissolved in acetone is a parent polymer particle having a mass or more. The above light diffusing agents may be used singly or in combination of two or more. When the light diffusing agent 1 〇 contains a light diffusing agent, the blending ratio of the light diffusing agent is proportional to the amount of the light-transmitting resin 1G () f, and is preferably 0.001 parts by mass, preferably 0.001 parts by mass. 01 parts by mass. Further, the light diffusing agent can be produced in the form of a light-transmissive dendritic masterbatch. Further, the refractive index of the light-transmitting resin = the absolute value of the difference in the refractive index of the diffusing agent is usually from 0. 〇1 to 〇.2 〇, and preferably 〇〇2 to 〇15 from the viewpoint of light diffusibility. Further, the light diffusing plate H) may be added with various additives such as an ultraviolet absorber, a heat stabilizer, an antioxidant, a weathering agent, a light stabilizer, a camping brightener, and a processing stabilizer. There is no particular limitation on the ultraviolet absorption (four)', and examples thereof include a salicylic acid ultraviolet absorber, a benzophenone ultraviolet absorber, a three-powder ultraviolet absorber, and a benzotri(4) ultraviolet absorption (four) 1 plus a UV absorber. With respect to the amount of the light-transmitting resin (10) f, it is preferred to add 〇·1 part by mass to 3 parts by mass of the ultraviolet absorber. When it is in the above range, it is possible to suppress the ultraviolet ray (four) oozing on the surface, and to maintain the light diffusing plate of 153040.doc 201139637. The appearance is good. The heat stabilizer is not particularly limited, and examples thereof include a manganese compound and a copper oxide σ. When adding a heat stabilizer, it is preferable to add it with the ultraviolet absorber and to infuse the ultraviolet absorber with a mass of 1 in the light-transmitting resin. More preferably, q ^ parts by mass to 1 part by mass of the heat stabilizer is added to the mass fraction of the ultraviolet absorber in the light transmission &amp; The antioxidant is not particularly limited, and examples thereof include a hindered compound and a hindered amine compound #. When an antioxidant is added, it is preferred to add G"f parts by weight to 3 parts by mass of the antioxidant in parts of the light-transmitting resin 1G (). Further, in the light-diffusing sheet 1A, an antistatic agent layer containing an antistatic agent containing a surfactant is formed on the front surface side main surface 16 and the (four) side main surface 18° on both sides. An antistatic agent layer is formed on the surfaces 16 and 18, and a thin electrostatic agent is applied over the entire area of the main surfaces 16 and 18. There is no particular limitation as an antistatic agent surfactant. As the cationic surfactant, a salt, a cationic acrylate derivative or the like. The cation is preferably exemplified by a tertiary amine, a quaternary amine, a cationic vinyl ether derivative, etc., for example, a quaternary ammonium salt is represented by the formula (1) 153040.doc 201139637 R1 R2 - Μ - R4X' In the formula (1), R1 to R4 are each a phenoline group, an amino group having 3 to 22 carbon atoms: an atom, a linear chain of 1 to 22, or a -CHaPh. Further, the X-form is separated from the + emulsifier ion, the sulfate ion, the phytic acid ion, the ion of the formula *(7) or the ion of the formula (3).化 η (2 R5 - 0 - S - 〇 &quot; * .11 0 :) The R5 knife is not a hydrogen atom, a linear alkyl group having a carbon number of 1 to 22, and a carbon number of 3 to 22 Branched base or even ph. [Chemical 6] 0 I! (3) 〇βΖ - 〇’

D 0 In the formula (3), Ζ represents a halogen atom. Among the above cationic surfactants, a cation-based interface having a molecular weight of (10) to (10) oxime is preferred (4). (4) Μ 醯 醯 酿 酿 酿 酿 二 二 二 二 二 二 二 二 乙 乙Base record ethyl sulphur _, cesium chloride ' ' gasification two burning base narration. Further, as the antistatic agent, not limited to a cationic surfactant, for example, an alkylsulfonic acid, an alkylbenzenesulfonic acid, and the like (lithium) salt can be used, 153040.doc -17-201139637

An anionic surfactant such as Na (sodium) salt, Ca (yttrium) salt, Mg (magnesium) salt, Zn (salt) salt, olefinic sulfonate and metal salt thereof, phosphate of higher alcohol; An amphoteric salt such as an amphoteric salt of an amine beet, an amphoteric salt of a carboxylic acid or a sulfonic acid alanine, or an amphoteric surfactant such as an amine oxide; for example, a fatty acid polyol ester, an alkyl (amine) polyoxyalkylene ethylene adduct, etc. Nonionic surfactants, etc. These may be used singly or in combination of two or more (including in combination with a cationic surfactant). Further, the amount of the antistatic agent containing the antistatic agent layer formed on the main faces 16, 18 is 0.02 mg/m2 to 1 mg/m2, preferably 〇mg/m2, more preferably 0.1 mg/m2. ~0.5 mg/m2. Further, the surface resistance values of the main faces 16 and 18 on which the antistatic agent layer is formed (for example, based on JIS K6911) are lxl 〇 9n / □ l lxl 〇丨 4 mouth, preferably 5 Μ 09 Ω / □ ~ 1 χ 10π Ω/□, more preferably ΐχΐ〇丨〇^□~ΐχΐ〇ΐ2 Ω/□. Further, the antistatic agent layer is not necessarily formed on both surfaces of the main faces 16, 18, and may be formed on either side. In this case, it is preferably formed on the surface opposite to the optical film 4 (the main surface 16 on the front side). When formed on the opposite surface to the optical film 4, uneven adhesion between the light diffusing plate 1 and the optical film 4 can be more satisfactorily suppressed. Further, as shown in FIG. 4, the light diffusing plate 10 is in a position where the semicircular convex portion 17 is parallel with respect to the linear light source 8 in the optical box 7, and the back surface (main surface 18) of the light diffusing plate 1 is abutted. The side wall 6 of the light box 7 is fixed to the light box 7. Thereby, the open surface 9 of the optical box 7 is blocked by the light diffusing plate 1〇. &lt;Manufacturing Method of Light-Diffusing Plate&gt; 153040.doc -18-201139637 The light-diffusing sheet 10 can be produced by cutting a resin sheet produced by the following method. Fig. 5 is a schematic configuration diagram of a manufacturing apparatus used in a method of producing a resin sheet according to an embodiment of the present invention. The sheet manufacturing apparatus 51 includes a sheet forming machine 52 which is formed by extruding a raw material resin into a sheet shape, and a set of pressing roller groups 54 for molding the extruded resin sheet 53 by extrusion. A coating roller group 55 for applying an antistatic agent to the formed resin sheet 53 and a pair of extraction roller groups 56 for extracting one of the resin sheets 53. The sheet forming machine 52 includes a first extruder 57 for heating and melting the raw material resin (a) of the base material layer 14, and a second extruder for heating and melting the raw material resin (B) of the back surface layer 15 A feed block 59 to which a resin which has been melted in the first and second extruders 57, 58 is supplied, and a mold 60 which extrudes the resin in the feed block 59 in a sheet state. As the first and second extruders 57 and 58, for example, a known extrusion molding machine such as a single-shaft extruder or a twin-screw extruder can be used. The first and second extruders 57 and 58 are provided with a hopper 61 and 62 for introducing resin into the cylinder of the extruder as the feed block 59, as long as two or more kinds of resin are supplied to the mold. The form which can be coextruded in the state of lamination is not particularly limited, and for example, two known three-layer distribution type, two types of two-layer distribution type, and the like can be used. The mold 60 is not particularly limited as long as it is a mold for co-extrusion, and for example, a known mold such as a multi-manifold mold can be used. The squeezing roller group 54 is provided with three squeezing rollers 63 to 65 as a resin sheet 53 which is formed by extrusion, and is formed on the upper surface of the resin sheet 53 by 75 and 76 (above 76). The main surface 16 on the front surface side of the light diffusing plate 10 and the lower surface 75 are the main surface 18 on the back side of the light diffusing plate 10, and a mechanism for forming irregularities by a transfer mold. Each of the three pressing rolls 63 to 65 is formed of a cylindrical metal (for example, stainless steel or steel) roller, and is arranged horizontally on each axis, and is used as the upper parent 63 and the intermediate roller 64 from top to bottom. The τ roller 65 is continuously arranged in the vertical direction so as to be parallel to each other. Motors (not shown) are connected to the rotating shafts of the pressing rollers 63 to 65, respectively, and the upper roller 63 and the lower roller 65 are rotatable counterclockwise, and the intermediate roller 64 is rotatable clockwise. That is, the squeezing rollers 63 to 65 are sequentially "reversible clockwise rotation", "clockwise rotation", and "reversible hour hand rotation" from top to bottom. By the fact that all of the rollers 63 to 65 can be rotated in the state in which the resin sheet 53 is held, the both sides 75 and 76 of the resin sheet 53 extruded from the sheet forming machine 52 can be conveyed while being processed. It is sent toward the coating roller group 55. The diameter of each parent is, for example, 100 mm to 500 mm. Further, when a metal roll is used as the pressing rolls 63 to 65, the surface may be subjected to a plating treatment such as chrome plating, copper plating, nickel plating, plating, or Ni_P plating. The peripheral surface 66 of the upper roll 63 can be made into a smooth surface by, for example, mirror finishing. On the peripheral surface 67 of the intermediate roller 64, for example, a rough transfer mold 68 for forming fine unevenness 19 on the resin sheet 53 is attached. In the rough transfer mold 68, a plurality of embossed shapes including fine concavities and convexities opposite to the shape of the fine concavo-convex ridges 9 of the main surface 丨8 on the back side of the light-diffusing sheet 1 are formed on the peripheral surface 67 of the intermediate roll 64. . That is, the surface of the rough transfer mold 68 is 153040.doc • 20·201139637 A rough surface having an embossed shape including fine irregularities distributed substantially uniformly over the entire surface, and has an arithmetic mean roughness Ra of, for example, 6.0 μm to 8.0 μm. The ten point average roughness 匕 is, for example, 45.〇ηηι 5〇〇μιη, and the average interval Rsm is, for example, 120 μηι to 150 μηι. On the peripheral surface 69 of the lower roll 65, a gravure transfer mold 7 for forming a semicircular convex portion 17 on the resin sheet 53 is attached. In the gravure transfer mold 70, a plurality of grooves having a shape opposite to the shape of the semicircular convex portion 17 of the cylindrical lens shape are formed along the circumferential direction of the lower roll 65. That is, the cut surface of the groove orthogonal to the longitudinal direction (circumferential direction) has a substantially semi-arc shape. The distance (pitch) between the centers of the adjacent grooves is appropriately determined depending on the shape of the semicircular convex portion 17. Further, the rough transfer mold 68 may be attached to the lower roll 65, and the gravure transfer mold 70 may be attached to the intermediate roll 64. Further, the circumferential surface 67 of the intermediate roller 64 can also be set as a smooth surface by applying the mirror ©. At this time, the main surface 18 on the back side of the light diffusing plate ι is a smooth surface. As the raw material of the rough transfer mold 68 and the intaglio transfer mold 7, for example, an organic material can be used. As the organic material, it is possible to maintain the heat resistance of the shape of the transfer mold even if the resin sheet 53 which has just been extruded from the mold 6 in the state of being melted (4) is pressed, and the heat resistance can be maintained, for example, (4) , resin such as thermoplastic resin. Examples of the thermosetting resin include a resin, an epoxy resin, a melamine, a urea resin, a polyimide resin (7) resin, an unsaturated polyester resin, an alkyd resin, and the like. 153040.doc -21. 201139637 Examples of the thermoplastic resin include a styrene resin, an acrylic resin, a polyethylene resin, a polypropylene resin, a cyclic olefin polymer resin, and an acrylonitrile butadiene-styrene resin. (ABS resin), polyethylene terephthalate resin (PET resin), polycarbonate resin (PC resin), polyether oxime resin (PES resin), thermoplastic polyimide resin (PI resin), and the like. Among these, a thermoplastic resin having a Vickers softening point (JIS K72064999 A50 method) higher than the Vickers softening point of the resin sheet 53 extruded from the mold 60, and a crosslinked thermoplastic resin are preferable. . The coating roller group 55 includes two pressing rolls 72 and 73 and one auxiliary roll, and has a roll coating mechanism in which the three three members 72 to 74 are organically combined. The three rolls 72 to 74 are respectively cylindrical. In the form of a metal (for example, stainless steel, steel, or the like), the rollers are continuously arranged in the vertical direction so that the respective axes are parallel with respect to the axes of the pressing rolls 63 to 65. The pressing roller 72 is configured to The upper end is provided at the same height position as the lower end of the lower roll 65, and abuts against the resin sheet 53 from the lower side. Further, the lower portion of the squeeze roll" is impregnated in the first liquid storage portion 78 and contains the prevention. A solution of an electrostatic agent (antistatic agent solution). With this, the anti-static agent solution can be applied to the lower surface 75 (main surface 18) of the resin sheet 53 in a state in which the resin sheet 53 fed from the lower roll 65 is supported at a height immediately after the feeding. Improve the workability of coating. The squeezing sheet 72 is a free roller rotatably in contact with the lower surface 75 of the resin sheet 53. The antistatic agent solution accumulated in the first liquid collecting portion 78 dissolves the antistatic agent in water or an organic solvent. The content of the solution towel and the antistatic agent is 001.001 mass%~0·〇7 mass%, preferably 0.005 mass. /. ~0.05 quality 153040.doc •22· 201139637 °/〇' More preferably 0.01 mass. ～0·05质量0/〇β If the antistatic agent contains # within this range, it is possible to stably impart a highly controlled and highly controlled antistatic property to (4) the loose plate. Therefore, it is possible to satisfactorily suppress the surface of the light diffusing plate 1 caused by the movement of the antistatic agent &gt; the dyeing and the unevenness of the adhesion between the light diffusing plate 10 and the optical film 4. The organic solvent to be used as the solvent is not particularly limited. For example, it can be enumerated, aromatic hydrocarbons, anthraquinones, alcohols, vinegars, and amines. Preferred examples thereof include alcohols. Specific examples of the alcohol include &quot;ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, propylene glycol, and glycerin. These organic solvents are used singly or in combination of two or more kinds (including in combination with water). As a commercial product of the antistatic agent, for example, "SAT_6C" (trade name) manufactured by Nippon Pure Chemical Co., Ltd., and ΓΜΧ50" (trade name) manufactured by Matsuda Industry Co., Ltd., etc., may be mentioned. These commercially available products can be prepared by dissolving and dissolving them appropriately with water or an organic solvent to prepare a solution containing an antistatic agent in the above range. The squeezing roller 73 is connected to a motor (not shown) at its same rotational position as the abutting position (contact position) of the squeezing roller 72 in the resin sheet, and is in contact with the resin from the upper side in a reversible clockwise rotation. The upper surface 76 of the sheet 53. The peripheral surface 77 of the squeezing roller 73 preferably contains a rubber material. The rubber material is, for example, a rubber material having a hardness of Α30 Α9 测定 measured based on JIS Κ6253, and specific examples thereof include NBR rubber, etc., for example, by mounting "such as a rubber sheet on the circumferential surface 77". The surface 77 is a rubber-made and a peripheral surface 77 of the squeezing roller 73. For example, it is preferable that the center portion of the axial direction is more bulged than the both ends by the convex surface plus 153040.doc • 23·201139637. The rotating shaft is connected to a motor (not shown), and flows upward in the feeding direction of the resin sheet 53 on the ith plane 79 which is more than the axis of the pressing roller 73 and the contact line of the pressing roller 73 with the resin sheet 53. The angular position of the side inclination is in contact with the circumferential surface 77 of the pressing roller 73 in a clockwise rotation manner. Specifically, the angle formed by the auxiliary roller 74 and the pressing roller 73, that is, the axis of the auxiliary roller 74 and The angle Θ between the second plane 8〇 of the axis of the squeezing roller 73 and the i-th plane 79 is, for example, 1 〇 to 9 〇, preferably 15 to 65. The rotation is in contact with the squeezing roller 73. The crucible 74 is inclined and contacts the pressing roller 73, whereby the pressing roller is directed toward the sheet The peripheral surface 77 in which the discharge roller 73 is opened in the outward direction and the peripheral surface 77 of the auxiliary roller 74 cooperate to partition the liquid storage portion 82 which is elongated in the axial direction of the rollers 72 to 74. Further, the auxiliary roller 74 The material of the circumferential surface 81 is preferably the same as the material of the peripheral surface 77 of the pressing roller 73. That is, the peripheral surface 81 of the auxiliary roller 74 preferably contains a rubber material. Further, the peripheral surface 81 of the auxiliary roller 74 The material of the auxiliary surface 74 may be made of a flat surface, for example, preferably by flattening the central portion and both end portions in the axial direction by the planar processing. By the circumferential surface 77 of the pressing roller 73 The shape is convexly processed, and the shape of the circumferential surface 81 of the auxiliary roller 74 is planarized, so that the contact state of the rollers 73 and 74 can be made good. Above the liquid storage portion 82, in the longitudinal direction of the liquid storage portion 82 (squeezing A plurality of supply nozzles are provided at equal intervals in the axial direction of the pressure roller 73. The supply of the antistatic agent to the liquid storage portion 82 is performed by, for example, dropping an antistatic agent from the supply nozzle 83. Furthermore, the supply nozzle 83 may be disposed only at the length of the liquid storage portion 82 of 153040.doc -24-201139637. The central portion is connected to the second liquid storage portion 84. The antistatic agent solution is stored in the second liquid storage portion 84. The antistatic agent solution "accumulated in the second liquid storage portion 84" is exemplified. The pair of extraction roller groups 56 includes one pair of extraction rollers 85 and 86 that sandwich the resin sheet 53 from both sides in the thickness direction. The extraction roller 8S is the same as the antistatic agent solution stored in the first liquid storage unit 78. Each of S6 is made of a cylindrical metal (for example, made of stainless steel or steel), and the upper end of the extracting roller 85 on the lower side is disposed opposite to the lower end of the lower roller 65 at the same height position. As a result, the resin sheet 53 fed from the lower roll 65 can be conveyed in a horizontally supported state immediately after being sent out, so that the conveyance resistance can be reduced. Next, a description will be given of a method of manufacturing the resin sheet 53 using the above-described manufacturing apparatus. (1) Sheet manufacturing step First, the raw material of the base material layer 14 into the hopper 61 of the first extruder 57 is melted and kneaded, and then supplied to the feed block. On the other hand, the raw material resin () of the back layer 15 is introduced into the hopper 62 of the second extruder 58 to be melt-kneaded, and then supplied to the feed block 59. The material red temperature of the second extruder 57 and the extruder 58 is set, for example, to 19 passages to 25 Torr (&gt;c. The resin in the feed block 59 is then coextruded from the mold 60, whereby The two layers of the resin sheet 53 on the lower substrate layer 14 and the upper back layer 15 of the bag 3 are continuously extruded. (2) Transfer step 153040.doc • 25- 201139637 Resin extruded from the mold 60 The sheet 53 is formed by extrusion and cooling by using the crucibles 63 to 65. Specifically, the resin co-extruded from the mold 60 is sandwiched and pressed between the intermediate light 64 and the intermediate light 64, and then 75 (the main surface 18 on the back side) is in contact with the peripheral surface 67 of the intermediate roll 64 and is conveyed, and is cooled at this time. The surface temperature of the upper roll 63 and the intermediate roll 64 is preferably lower than that of the resin sheet 53. The extrusion temperature is, for example, 50 ° C to 120. (: Moreover, when the upper roll 63 and the intermediate roll 64 are pressed, the transfer is carried out on the lower surface 75 of the resin sheet 53 (the main surface 18 on the back side). A plurality of fine concavo-convex irregularities 19 are formed in the shape of the rough transfer mold 68 of 64. Thereafter, it is sandwiched and pressed by the intermediate roller 64 and the lower roller 65. As the surface temperature of the lower crucible 65, for example, 50t: 〜120°C » Further, when the intermediate roller 64 and the lower roller 65 are pressed, the surface shape of the intaglio transfer mold 70 is transferred on the upper surface 76 of the resin sheet 53 (the main surface 16 on the front side). In the flow direction (feeding direction) of the sheet, a plurality of parallel strip-shaped semicircular projections 17 are formed. Thereafter, the resin sheet 53 is adhered to the peripheral surface 69 of the lower roll 65 by the upper surface 76, and is transported. The lower end of the roller 65 is fed horizontally toward the application roller group 55. (3) Coating step In the coating roller group 55, the pressing roller 73 rotates in the same direction as the lower roller 65 (counterclockwise rotation), and The auxiliary roller 74 is rotated in synchronization. Then, the antistatic agent supplied from the supply nozzle 83 to the liquid storage portion 82 is continuously attached to the circumferential surface 77 of the pressing roller 73 passing through the liquid storage portion 82 by the rotation of the pressing roller 73. It is conveyed to the contact position of the press roll 73 and the resin sheet 53 in the state attached to the circumferential surface 77. Then, in the contact position of the press roll 73 and the resin sheet 53, the resin sheet 153040.doc -26 · The upper surface 76 of 201139637 53 is pressed by the peripheral surface 77 to which the antistatic agent is attached. Thereby, the semicircular convex portion 17 of the resin sheet 53 is in contact with the antistatic The agent is uniformly coated with an antistatic agent on the upper surface 7 6 on which the semicircular convex portion 17 is formed. On the other hand, the pressing roller 72 rotates in the same direction as the intermediate roller 64 (clockwise rotation). Then, the first liquid is accommodated. The antistatic agent accumulated in the portion 78 is continuously attached to the peripheral surface of the extrusion report 72 passing through the first liquid storage portion 78 by the rotation of the pressing roller 72 to be attached to the pressing roller while being attached to the circumferential surface. 72. Position at which the resin sheet 53 abuts. Then, at the abutment position of the pressing roller 72 and the resin sheet 53, the lower surface 75 of the resin sheet 53 is pressed by the peripheral surface to which the antistatic agent is attached. Thereby, the fine unevenness 19 of the resin sheet 53 is in contact with the antistatic agent, and the antistatic agent is uniformly applied to the lower surface 75 on which the fine unevenness 19 is formed. Thereby, an antistatic agent is applied to both surfaces 75 and 76 of the resin sheet 53. In addition, when the antistatic agent is contained in the solution in the above range, the amount of the antistatic agent is 5 〇〇 mg/m 2 to 2000 mg/m 2 ' with respect to each surface 75 and %. Preferably, it is 5 〇〇 mg/m 2 to i 5 〇〇 claw coffee 2, more preferably 1000 mg/m 2 〜 15 〇〇 mg/m 2 . (4) Drying step After the application of the antistatic agent, the resin sheet 53 is dried at, for example, 3Qt to 18 Torr, at 3 Gt to 1 GG ° C, thereby allowing the solvent of the antistatic agent solution.

= The knife is evaporated, and the two faces 75, 76 of the resin sheet 53 are loaded with an antistatic agent to form an antistatic agent layer. Further, if A is used as a dry method, there is no special county system, such as the air drying method, the 埶 (7) extraction step, the "wind" method, and the infrared drying method. 153040.doc •27- 201139637 53 After that, the resin sheet is produced by extracting the extraction rolls 85 and 86. Thereafter, the resin sheet 53 is further cooled, and cut at an appropriate size, whereby the above-mentioned light diffusing plate 1 is obtained. (6) Operational effect As described above, according to the resin sheet of the present embodiment, the antistatic agent is carried on the main surface 16) and the lower surface 75 (the main surface 18 on the back side) of the upper surface side, so that the resin can be applied to the resin. The sheet 53 is provided with an antistatic property. The amount of the antistatic agent carried is 0.02 mg/mM mg/m 2 , so that it can be used as a light diffusing plate obtained by using the resin sheet 53 to suppress the antistatic agent. The light (4) plate caused by the movement of the surface may be (4) the unevenness of the bonding when the light diffusing plate 10 and the optical film 4 are used in combination. Further, the term "closely connected unevenness" refers to the generation of the light diffusing plate 1 and the optical The portion where the film 4 is in close contact and the portion where the light diffusing plate 10 is not in close contact with the optical film 4. If the adhesion is uneven, there is no air layer between the light diffusing plate 1〇 and the optical film 4 in the close portion, and the air layer is present. Compared with the non-closed portion, the light passing amount or the passing direction is different, resulting in display unevenness. - Relative to this 'according to the backlight system 2 and the liquid crystal display 1 having the light diffusing plate 1 即便 even in the light diffusing plate〗 The optical film 4 is disposed on the crucible, and the light diffusing plate 10 and the optical are also suppressed. As a result, the unevenness of the display of the liquid crystal display 1 can be suppressed, and high-quality light can be obtained. Further, according to the method for producing the resin sheet 53 of the present embodiment, the resin sheet 53 is attached to the resin sheet 53. 76 and 75 are coated with a solution containing an antistatic agent, followed by drying, so that the resin sheet 53 ^ can be economically produced, and an embodiment of the present invention can be described. The present invention can also be 153040.doc • 28·201139637 Further, the light-diffusing sheet (resin sheet) is not limited to the two-layer resin sheet like the light-diffusing sheet 10, and may be, for example, a single-layer resin sheet, a three-layer resin sheet, or four layers. The resin sheet of the above layer. The surface shape of the light diffusing plate 10 is not limited to the cylindrical lens shape and the rough surface shape (embossing), and may be processed into various shapes to enhance the light diffusing property of the light diffusing plate 10. Further, the shape of the main surface 16 on the front side and the main surface 18 on the back side may be the same or different. In the above embodiment, the antistatic agent solution is applied to the resin sheet 53 by a roll coating method. Make The coating method of the antistatic agent solution may be, for example, a spray coating method, a lip coating method, a blade coating method, a gravure coating method, a bar coating method, a dip coating method, a die coating method, or the like. 10 is suitably used as a light diffusing plate for backlights, but is not particularly limited to such use. Further, the optical system 2 is suitably used as a surface light source device for liquid crystal displays, but is not particularly limited to such use. In the following description, the present invention is not limited to the following examples. In the following description, "" and "parts" are mass% and mass unless otherwise specified. Share. &lt;Material of Resin Sheet&gt; As a material of the resin sheet, the following materials (?) to (8) were prepared.

(1) Translucent resin A styrene resin (153040.doc -29- 201139637 HRM40 manufactured by Toyo Styrene Co., Ltd., refractive index 1 59) (2) Antistatic agent solution a Antistatic agent (Japanese pure 0.06 parts by mass of "Sat_6C" manufactured by Pharmaceutical Co., Ltd. (wherein the content of the antistatic agent active ingredient is 〇〇2 mass I) is mixed with 30 parts by mass of ion-exchanged water (diluted 500 times). The antistatic agent was thus prepared in an amount of 0.066 mass%. Solution A. (3) Antistatic agent solution b Antistatic agent ("SAT_ 6Cj" manufactured by Nippon Pure Chemical Co., Ltd.) 0.03 parts by mass (wherein the effective component content of the antistatic agent is 质量part parts by mass) and ion exchange water 3〇 Mixing parts by mass (diluted 1000 times), thereby preparing a solution b having an antistatic agent content of 0.033% by mass. (4) Antistatic agent solution c Antistatic agent ("sat_6C" manufactured by Nippon Pure Chemical Co., Ltd.) 〇·〇2〇 parts by mass (wherein the antistatic agent active ingredient content is 〇 parts by mass) and 3 parts by mass of ion-exchanged water (diluted 15 times). Thus, a solution c having an antistatic agent content of 0.022% by mass was prepared.

(5) Antistatic agent solution D Antistatic agent ("Μχ_ 5〇" manufactured by Matsuda Glass Industry Co., Ltd.) 0.03 parts by mass (wherein the effective component content of the antistatic agent is 〇 by mass) and ion exchange water 30 mass Mix (1000 times dilution). Thus, a solution D having an antistatic agent content of 0.033 mass% was prepared. (6) Antistatic agent solution e Antistatic agent ("SAT 6C" manufactured by Nippon Pure Chemical Co., Ltd.) 〇.3 parts by mass (wherein the effective component content of the antistatic agent is 〇1 quality 153040.doc 201139637 copies) It was mixed with 30 parts by mass of ion-exchanged water (100-fold dilution). Thus, a solution E of an antistatic agent content of 0.33 mass% was prepared.

(7) Antistatic agent solution F An antistatic agent ("SAT_ 6C" manufactured by Sakamoto Pure Chemical Co., Ltd.) 〇·〇 9 parts by mass (wherein the effective component content of the antistatic agent is 〇〇3 parts by mass) 30 parts by mass of ion-exchanged water was mixed (diluted 330 times to prepare a solution F having an antistatic agent content of 0.1% by mass. (8) Antistatic agent solution g Antistatic agent (manufactured by Nippon Pure Chemical Co., Ltd.) "SAT_ 6C") 0.00075 parts by mass (wherein the content of the antistatic agent active ingredient is more than 0. 00025 parts by mass) is mixed with 3 parts by mass of ion-exchanged water (diluted 4 times) to prepare an antistatic agent content. (Examples and Comparative Examples) (Example 1) 1. The configuration of the apparatus for producing a resin sheet is the same as that of the resin sheet manufacturing apparatus 51 shown in Fig. 5 . In the same manner, the conditions of the pressing roller group and the coating roller group are as follows: (1) A metal roller (diameter: 45 mm) having a mirror surface processed on the upper surface of the upper roller. (2) Middle A metal roll (diameter: 45〇mm) with a rough transfer mold on the circumference of the roll. The circumferential surface of the intermediate roll is set to a rough bobbin surface on which a plurality of fine concavities and convexities are formed. (3) A metal roll (diameter: 45 mm) having a gravure transfer mold on the lower surface of the lower roll. 153040.doc -31- 201139637 That is, on the circumferential surface of the lower roll, a plurality of strip-shaped semicircular arc-shaped grooves are formed in parallel with each other in the circumferential direction. (4) The pressing roll (upper side) is made of rubber. Metal roll with a circumferential surface shape convexly processed (diameter: 50 mm). (5) The circumferential surface of the auxiliary roll is made of rubber, and the surface shape is machined by a flat surface (diameter 50 mm). Also, the auxiliary roll and the upper side The angle formed by the squeezing roller (the angle Θ between the second plane and the first plane) is set to 20. (6) Squeeze roller (lower side) The same roller as the squeezing roller (upper side) is used. 2. Specific production method 100 parts by mass of the translucent resin A is melt-kneaded in a first extruder having a temperature of 190 ° C to 250 ° C in a red material, and is supplied to a two-layer distribution type feed block. 100 parts by mass of the translucent resin A is melted and kneaded in a second extruder having a temperature of 190 C to 250 C in the cylinder, and then distributed to the above two layers. a type of feed block. Then, the resin supplied from the first extruder to the feed block becomes a base material layer (resin (A) layer), and the resin supplied from the second extruder to the feed block becomes a back layer ( In the form of the resin (B) layer, the resin in the feed block was co-extruded by a multi-manifold mold (width: 1500 mm) at an extrusion resin temperature of 250 ° C, and then carried out by the upper, middle and lower rolls. By extrusion and cooling, a two-layer laminated resin layer having a width of 1300 mm and a total thickness of 2.0 mm (substrate layer 1.95 mm, back surface layer 0.05 mm) was produced. 153040.doc •32- 201139637 In the production process of the laminated resin layer, the resin co-extruded from the mold is sandwiched and pressed by the upper roll and the intermediate roll, and then adhered to the peripheral surface of the intermediate roll and conveyed. Cool down. Since the rough transfer die is provided on the circumferential surface of the intermediate roll, when the upper roll and the _ roll are pressed, the transfer is thick on the main surface of the back layer (resin (8) layer) side of the laminated resin layer (4) The stamp forms a plurality of fine concavities and convexities. Thereafter, it is sandwiched and pressed by the intermediate roller and the lower roller. Since the concave plate is provided on the circumferential surface of the lower roll, the gravure transfer mold is transferred onto the main surface of the base material layer (resin (A) layer) side of the laminated resin layer when the intermediate roll and the lower roll are pressed. Thereby, a plurality of parallel strip-shaped semicircular convex portions are formed in the flow direction of the laminated resin layer. Further, the surface temperature of each of the rolls was adjusted so that the surface temperature of the rolls was 65 〇 c, the surface temperature of the intermediate rolls was 77 ° C, and the surface temperature of the lower rolls was 98 。. In the coating roller group, antistatic coating is applied to both sides (front side and back side) of the laminated resin layer at 1 〇〇〇 mg/m 2 to 15 〇〇 mg/m 2 by the upper and lower pressing rolls. Solution A. Further, in the liquid storage portion of the upper squeeze roller, the antistatic agent solution A is added dropwise at 70 mL/sec to 1 〇〇 mL/sec per 1 m in the axial direction of the upper squeeze roller. Further, the production speed of the resin sheet was 4. 〇. The laminated resin layer coated with the antistatic agent solution A is air-dried by an air knife to form a resin sheet in which an antistatic agent layer containing an antistatic agent is formed on both surfaces of the laminated resin layer (in the antistatic agent layer) The content of the antistatic agent is the front side: 0.7 mg/m2~1.〇mg/m2, the back side: 〇.7 mg/m2~1.0 mg/m2) 〇153040.doc -33- 201139637 The agent layer:= The same method and conditions as in Example 1 were prepared to have antistatic properties (the content of the antistatic agent in the antistatic agent layer was 0-3 mg/m, 0, mg/m2, , φ #J : 〇^ mg/ m^〇^

Γ3) In addition to the antistatic agent solution Α changed to the antistatic agent solution C agent = = the same method as in Example 1. The condition is made to prepare an antistatic side sheet (antistatic agent in the antistatic agent layer) The content is in the range of .mg/m2 to 0.3 mg/m2, and the back side: 〇2 mg/m2) 〇, (Example 4) except that the antistatic agent solution A is changed to the antistatic agent solution d ϋΐ 'by the embodiment (1) The same method and conditions are used to produce a resin sheet having an antistatic layer: (the content of the antistatic agent in the antistatic agent layer is the front side·〇·3 mg/m2 to 〇·5 mg/m2'. 〇3 to $mg/m2) 〇丄In the fifth embodiment, the antistatic agent solution C is supplied to the liquid storage portion of the upper pressing roller, and the antistatic agent is supplied to the first liquid storage portion through which the lower side is pressed. In addition to the modification of the method of the solution E, a resin sheet having an antistatic agent layer is produced by the same method as the embodiment, and the content of the antistatic agent in the antistatic agent layer is the front side: 〇2 Mg/m2~Q 3 mg/m2, back side: 3.3 mg/m2~5.〇mg/m2). (Example 6) except that the antistatic agent solution C is supplied to the liquid storage portion of the upper pressing roller, and the antistatic agent solution B is supplied to the first liquid storage portion through which the lower pressing roller passes. By the same method as the embodiment 153040.doc • 34· 201139637 =v: Two resin sheets with an antistatic agent layer (the content of the antistatic agent in the antistatic agent layer is the front side: 〇.2mg/m2~ 〇.3mg/m2, back side. 0.3 mg/m2~〇5 mg/m2). (Improved by the method of supplying the anti-static agent solution B to the liquid storage unit supply solution B of the upper side of the squeeze roller and the anti-static agent solution E to the third liquid storage unit through which the lower side of the squeeze is passed, Example (1) The same method and conditions were used to prepare a resin sheet having an antistatic agent layer (the content of the antistatic agent in the antistatic agent layer, the front side: G.3 mg/m2 to G5, the back side: 3.3 mg/ M2 to 5.0 mg/m2). (Comparative Example 1) A resin having an antistatic agent layer was produced by the same method and conditions as in Example 1 except that the antistatic agent solution A was changed to the antistatic agent solution e. The sheet (the content of the antistatic agent in the antistatic agent layer is the front side: 3.3 mg/m 2 to 5 ··mg/m 2 , the back side: 3 3 _ 2 mg / m ) (Comparative Example 2) except The antistatic agent solution A was changed to the antistatic agent solution F, and the resin sheet having the antistatic agent layer was prepared in the same manner and condition as in the case of m. (The content of the antistatic agent in the antistatic agent layer is the front side: 1.5 Mg/m2~2·〇mg/m2, back side: i 5 mg/m2~2 〇mg/m2) (Comparative Example 3) except that the antistatic agent solution A was changed In addition to the antistatic agent solution g, a resin sheet having an antistatic agent layer is prepared by the same method as in the case of m. (The content of the antistatic agent in the antistatic (4) is the front side: 咖. coffee mg/m2~ 0_012 mg/m2, back side: kneading surface mg/m2 to 0.012 mg/m2) 153040.doc •35·201139637 &lt;physical property evaluation&gt; 1. Preparation of light diffusing plate The above examples and comparative examples were produced. Each of the resin sheets was cut to an appropriate length to prepare a light-diffusing sheet. The following properties of 2 to 6 were measured for the produced light-diffusing sheet. The results are shown in Table 1. 2. The surface resistance value is JIS. Based on K6911, an insulation meter ("SM-8220" manufactured by Toa DKK Co., Ltd.) and an electrode for flat sample ("SME-8311" manufactured by Toago DKK Co., Ltd.) were used to measure the two sides of the light diffusing plate. Surface resistance value (Ω/port). In addition, the state of the measurement sample was adjusted before measurement, and it was placed under conditions of 23 eC X humidity 50% RH for 6 hours. The measurement system was 2 points on each side, totaling 4 points. The measurement was carried out, and the range of measured values of 4 points is shown in Table 1. 3. Coating Uniformity of the surface Before and after the application and drying treatment of the antistatic agent solution, the change of the discoloration and the surface state of the completely non-light diffusing plate is referred to as "〇", and the change of discoloration or surface state is marked as "X". 4. Installation display According to the configuration of the liquid crystal display i shown in Fig. 1, a 32-type cathode tube lower liquid crystal display is assembled, and 'the display unevenness when the cathode tube back (linear light source) of the liquid crystal display is lit Undergo verification. The person who has no display at all is referred to as "〇", and the visual inspection confirms that the image is displayed as the optical film laminated on the light diffusing plate, and the "film 1" of the Japan Printing Co., Ltd. "(Product name). 153040.doc -36- 201139637 5. Inconsistent connection and movement of the use of a laminating machine ("LS-1000", trade name) manufactured by Sumitomo 3M Co., Ltd., for light diffusing plates and optical films (large Japan Printing Co., Ltd.) The laminated sample of the "film PM PM6" manufactured by the company was applied at a pressure of 1.0 MPa at a speed of 5 〇 mm/sec to carry out a test for promoting adhesion unevenness and movement. The sample passed through the bonding machine was confirmed on the backlight, and the adhesion unevenness between the light diffusion plate and the optical film when the backlight was lit was visually evaluated. The occupied area ratio (%) of the uneven portion of the adhesion was calculated by the following formula. Area ratio of uneven contact area = area of uneven contact generation / area of total evaluation χΐοο(ο/〇) Further, after the test is promoted, the contact surface of the light diffusing plate and the optical film will be visually observed to be completely free of the antistatic agent. Recorded as "None", the mover is recorded as "Yes". 6. Surface resistance value reliability test The measurement data were separately measured under the conditions of 75 ° C Hg lamp irradiation (intensity 1 mW/cm 2 ), and after 100 hours, the surface was measured according to the method described in r2. Surface resistance value. Resistance value (Ω/port). Further, about 75 tHg lamp irradiation conditions, Hg lamp irradiation was performed from the back side of the light diffusion plate. 7. Investigate that the value of the Η 丨 在 is in the range of lxl ( Ω / □ ~ lx ΙΟ 14 Ω / □, anti-static performance is good. On the other hand, the initial surface resistance of the light diffusing plate of Comparative Example 3 is 1 χΐ〇 9 mouth ~ Outside the range of ixw Ω/□, the antistatic performance is insufficient. The light diffusing plate of the embodiments 1 to 7 is installed in the 翱 翱 岭 不 不 不 、 ; ; ; ; ; ; ; ; ; ; 153 ; ; ; ; ; ; 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 153 The test order has less adhesion, or no movement at all, and is good. On the other hand, the light diffusion plate of Comparative Example and 2 can confirm the unevenness of the mounting display and the unevenness of the adhesion. The movement phenomenon promotes the adhesion in the test and Further, regarding the light diffusing plate of Comparative Example 3, although there is no display unevenness and uneven bonding, the movement phenomenon promotes the adhesion or movement in the test, but the surface resistance value is large, and the antistatic property is insufficient. According to the above results, it is understood that the effective component concentration of the antistatic agent solution can be adjusted to 0.001 to 0.07% by mass, thereby providing excellent antistatic properties with durability. Well suppressed by the anti-contamination of the surface due to movement of the antistatic agent of the light diffusion plate, the adhesion and the unevenness of the light diffusion plate and the optical film of generating 153040.doc • 38 -. 201139637

〇&quot;〇ο 〇O ο ο ο ο &quot;ο Ο &quot;ο νο &quot;ο ^ vS 滗μ p窆^ |B&gt; Ss d IN X ο m X o X Ο r\ X ο 1 X ο 趄Vg vg &quot;ο Ο o &quot;o ο Ο &quot;ο Ο ο ο r*HX ο total oi X o »n&quot; — X ο γ4 X Ο (Ν X ο oi X ο ΓΛ X ρ X ο (Ν 避Il m +? 碟碟μΟ K-^ 雄萃令o ο δ fH Λ Γ*Ή Ο Silver Φ b 62- •ϋΓ 电*5? ίΓ ο 0 o 〇ο ο Ο χ κ- X Κ- X姊铋K· 埤邾+? Uniformity of the surface ο oo oo 〇ο ο Ο 0 〇S' 2 « ^|S ο^ ο % o 〇\ Ο ο &quot;ο 0^ &quot;ο X ο 〇6 ο X ο 〇\ Ο X o JS &quot;ox^ ΙΤΪ c^ 兰 iQ Έ&gt; χ^ 1·^ ο X ο &quot;ο X Ο eg X 1 ο X ο σ\ &quot;ο Also vS Slightly X ο X ο 卜: X o in X ο — X ο X ρ 寸 · X ο X ο ν〇X ο ιή % ο ΓΛ Vi ο »η ρ ο Ο ?5 &lt;Ν —1 .,^vg £&quot;ε^ Sii ο ? ? ο 十(Ν ΡΊ CN cn ? ΓΛ CO ΓΛ m yn 9 S 〇· 5 ? 5 i C2 ΓΛ ? 5 m Cn ϊ〇i ο «ο ο &lt;Ν ?? 00 SS §8 卜ο m ο (N 〇CO (Ν Ο CN Ο cn ο η ΓΟ irj ο 〇 Turn W to $ β Ό VO Ο ΓΛ m ο CN S ro fO o ΓΊ CO S mmm ΓΛ 00 00 ο ο $ i 芒 $ 〇 $ § S Ο ο ο 5 f 絮 wv@ νο ν〇ο ο m S ο (NS 〇m S o CN S Ο m S o ro ο Ο Ο Μ ο ο tw « Electrostatic solution 恻 / back 5 Ρ U 9 55 υ Tian Tian 52 &lt; CQ Q υ CQ ω ϋ π ο 圪 & Ν CJJ _ϋ aJ 39 153040.doc 201139637 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view of a liquid crystal display according to an embodiment of the present invention. Fig. 2 is a schematic perspective view of a liquid crystal display according to an embodiment of the present invention. Fig. 3 is a schematic perspective view of a light diffusing plate. Fig. 4 is a cross-sectional view showing the principal part of the optical box in which the light diffusing plate is mounted to the optical box. Fig. 5 is a schematic configuration diagram of a manufacturing apparatus used in a method of producing a resin sheet according to an embodiment of the present invention. [Main component symbol description] 1 Liquid crystal display 2 Backlight system 3 Liquid crystal panel 4 Optical film 5 Rear wall 6 Side wall 7 Light box 8 Linear light source 9 Open surface 10 Light diffusing plate 11 Liquid crystal cell 12, 13 Polarizing plate 14 Base material layer 153040 .doc 40- 201139637 15 16,18 17 19 51 52 53 54 55 56 57 58 59 60 61 &gt; 62 63 64 65 66 , 67 , 69 , 77 , 81 68 70 72 , 73 74 75 Back surface main surface semicircular convex Part of the embossed resin sheet manufacturing apparatus, the sheet forming machine, the resin sheet, the roll group for the roll group, the roll group for the roll group, the first extruder, the second extruder, the feed block, the mold hopper, the upper roll, the middle roll, the lower roll, the roll Surface rough transfer die gravure transfer die Squeeze roller auxiliary roller lower surface 153040.doc -41 - 201139637 76 Upper surface 78 first liquid storage portion 79 first plane 80 second plane 82 liquid storage portion 83 supply nozzle 84 second liquid storage Part 85 ' 86 Extraction roll E, spacing ha South Pi spacing T total thickness ti, t2 thickness 153040.doc -42-

Claims (1)

201139637 VII. Scope of application for patents: 1. A tree-shaped sheet with a resin layer and a layer containing 〇.〇2 mg/m2~1. 2_ The resin sheet of claim 1 has a resistance of 1 χ 1 〇 9 Ω / □ 〜 1 X 1014 3. The resin sheet of claim 1 is a surfactant. 4. The resin sheet of claim 3, having a molecular weight of from 100 to 1,000. 5. The resin sheet of claim 4, comprising an ammonium salt represented by the formula (1), an antistatic agent formed of the antistatic agent of the resin layer mg/m, wherein the antistatic agent layer is Surface electric Ω / d. Wherein the antistatic agent contains a cation, wherein the cationic surfactant is the cationic surfactant R1 R2 - N't R4X-...(1) m (in the formula (1), R1 to R4 represent a hydrogen atom, and the number of carbon atoms is 1~ a linear chain of 22, a branched wire having a carbon number of 3 to 22 or an even (10), a cerium ion, a hydroxide ion, a sulfate ion, an acidate ion, an ion of the formula (2) Or the formula (3) so the ion), Ο » R5 - 0 S - ο ι Ο 153040.doc (2) 201139637 (in the formula (2), R5 represents a hydrogen atom, a carbon atom number 22 linear alkyl group , a branched alkyl group having a carbon number of 3 to 22 or -CH2ph), [Chemical 3] Ο » 〇 °=2- 〇~ ... (3) 0 0 (in the formula (3), 'Z represents a halogen atom) . A surface light source device comprising: a light box made of resin opened in front, a light source arranged to be spaced apart from each other in a direction opposite to the front surface; and a front surface that is blocked from the light source The light diffusing plate is obtained by cutting the resin sheet according to any one of claims 1 to 5. A liquid crystal display device comprising: the surface light source device of claim 6; and a liquid crystal panel disposed in front of the surface light source device. 8. The liquid crystal display device of claim 7, further comprising an optical film disposed between the light diffusing plate and the liquid crystal panel, wherein at least one surface of the optical film has a surface resistance of 1 x 10 丨 3 Ω/□ or more value. A method for producing a resin sheet, comprising the steps of: applying a solution containing 0.001% by mass of 7% by mass of an antistatic agent to at least one side of a resin layer; and 153040.doc 201139637 The above resin layer coated with the above solution is dried; and the coating amount of the above solution is from 500 mg/m2 to 2000 mg/m2. 153040.doc