WO2013115324A1 - 撥液性樹脂シートの製造方法、導光板の製造方法、撥液性樹脂シートの製造装置及び導光板の製造システム - Google Patents

撥液性樹脂シートの製造方法、導光板の製造方法、撥液性樹脂シートの製造装置及び導光板の製造システム Download PDF

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Publication number
WO2013115324A1
WO2013115324A1 PCT/JP2013/052233 JP2013052233W WO2013115324A1 WO 2013115324 A1 WO2013115324 A1 WO 2013115324A1 JP 2013052233 W JP2013052233 W JP 2013052233W WO 2013115324 A1 WO2013115324 A1 WO 2013115324A1
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WO
WIPO (PCT)
Prior art keywords
resin sheet
electrodes
pair
liquid repellent
liquid
Prior art date
Application number
PCT/JP2013/052233
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English (en)
French (fr)
Japanese (ja)
Inventor
祥太郎 西野
基央 野田
秀諭 嶋谷
澤田　康志
Original Assignee
住友化学株式会社
エア・ウォーター株式会社
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Publication date
Application filed by 住友化学株式会社, エア・ウォーター株式会社 filed Critical 住友化学株式会社
Priority to KR1020147024351A priority Critical patent/KR20140126356A/ko
Priority to CN201380007102.XA priority patent/CN104136509B/zh
Publication of WO2013115324A1 publication Critical patent/WO2013115324A1/ja

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide

Definitions

  • the present invention relates to a liquid repellent resin sheet manufacturing method, a light guide plate manufacturing method, a liquid repellent resin sheet manufacturing apparatus, and a light guide plate manufacturing system.
  • Patent Document 1 discloses a technique for repelling a glass surface by generating atmospheric pressure plasma in an atmospheric gas containing perfluorocarbon (PFC) and helium.
  • the power supplied to the electrode to generate atmospheric pressure plasma is power that has a power density of about 30 W / cm 2 to 100 W / cm 2 .
  • Patent Document 1 If the conditions described in Patent Document 1 are applied to the liquid repellent treatment of a resin sheet, the resin sheet is easily damaged.
  • the present invention provides a liquid repellent resin sheet manufacturing method, a light guide plate manufacturing method, a liquid repellent resin sheet, a liquid repellent treatment apparatus, capable of avoiding damage while performing liquid repellent treatment using atmospheric pressure plasma, And it aims at providing the manufacturing system of a light-guide plate.
  • a method for producing a liquid-repellent resin sheet according to one aspect of the present invention is a method for producing a liquid-repellent resin sheet having a surface subjected to a liquid-repellent treatment, between a pair of electrodes arranged facing each other.
  • the main surface of the resin sheet disposed between the pair of electrodes is subjected to a liquid repellent treatment by atmospheric pressure plasma.
  • the electrode is supplied with power corresponding to a power density of 1 W / cm 2 to 25 W / cm 2 .
  • the atmospheric gas contains argon and perfluorocarbon.
  • the step of applying the liquid repellent treatment includes the step of applying the first liquid repellent treatment by atmospheric pressure plasma to the main surface of the resin sheet while conveying the resin sheet between the first pair of electrodes, and the resin sheet. Performing a second liquid repellent treatment by atmospheric pressure plasma on the main surface while transporting the resin sheet between the second pair of electrodes disposed on the downstream side of the first pair of electrodes in the transport direction.
  • the atmospheric gas is supplied between the first pair of electrodes and the second pair of electrodes from between the first pair of electrodes and the second pair of electrodes in the transport direction of the resin sheet. To do.
  • the main surface is subjected to the second liquid repellent treatment after the main surface is subjected to the first liquid repellent treatment, desired liquid repellency can be imparted to the main surface. Furthermore, since atmospheric gas is supplied between the first pair of electrodes and between the first pair of electrodes and between the second pair of electrodes, the liquid repellent treatment is applied to the main surface. Can be applied uniformly.
  • the first liquid repellent treatment and the main surface of each of the plurality of resin sheets are conveyed while sequentially transferring the plurality of resin sheets between the first pair of electrodes and the second pair of electrodes.
  • a second liquid repellent treatment may be performed.
  • perfluorocarbon may be carbon tetrafluoride.
  • the light guide plate manufacturing method includes a step of manufacturing a liquid repellent resin sheet by the above method according to one aspect of the present invention, and a liquid repellent resin sheet subjected to a liquid repellent treatment by solidifying the liquid ink. Forming a plurality of reflective dots that reflect light propagating in the liquid repellent resin sheet on the surface.
  • reflective dots are formed using liquid ink on the main surface of the liquid-repellent resin sheet produced by the above-described method according to one aspect of the present invention. Since the resin sheet is hardly damaged during the liquid repellent treatment, the manufacturing yield of the light guide plate is improved. Since the reflective dots are formed using liquid ink on the surface subjected to the liquid repellent treatment, it is easy to obtain reflective dots having a desired shape.
  • the step of forming the reflective dots may include a step of dripping liquid ink on a main surface that has been subjected to a liquid repellent treatment by an inkjet method and a step of solidifying the liquid ink. Reflective dots are obtained by solidifying the liquid ink dropped onto the principal surface that has been subjected to the liquid repellent treatment.
  • the liquid ink may be an ultraviolet curable ink.
  • the liquid ink in the step of solidifying the liquid ink, the liquid ink may be solidified by irradiating the liquid ink with ultraviolet rays.
  • the reflective dot may have a diameter of 20 ⁇ m or more and 120 ⁇ m or less.
  • an interval between two adjacent reflective dots among the plurality of reflective dots may be 80 ⁇ m or more and 200 ⁇ m or less.
  • the contact angle with respect to pure water of the liquid-repellent main surface of the liquid-repellent resin sheet produced in the step of producing the liquid-repellent resin sheet may be 85 ° or more and 120 ° or less.
  • Still another aspect of the present invention relates to an apparatus for producing a liquid repellent resin sheet.
  • the apparatus for producing a liquid-repellent resin sheet is an apparatus for producing a liquid-repellent resin sheet having a surface subjected to a liquid-repellent treatment, and a pair of electrodes disposed opposite to each other and a resin between the pair of electrodes.
  • a sheet placement section for placing the sheet; a power source for applying a voltage for generating atmospheric pressure plasma between the pair of electrodes to the pair of electrodes; and a gas supply section for supplying an atmospheric gas between the pair of electrodes.
  • power corresponding to a power density of 1 W / cm 2 to 25 W / cm 2 is supplied to the electrodes from a power source.
  • the atmospheric gas contains argon and perfluorocarbon.
  • the sheet arrangement unit is a conveyance unit that conveys the resin sheet, and the first pair of electrodes and the second pair of electrodes among the two pairs of electrodes are conveyance of the resin sheet by the conveyance unit.
  • the gas supply unit is arranged so as to separate the atmospheric gas from between the first pair of electrodes and the second pair of electrodes and between the first pair of electrodes and the second pair in the transport direction. Between the pair of electrodes.
  • the second liquid repellent treatment is performed on the main surface. Therefore, desired liquid repellency can be more reliably imparted to the main surface. Furthermore, since atmospheric gas is supplied between the first pair of electrodes and between the first pair of electrodes and between the first pair of electrodes and between the second pair of electrodes, the resin sheet is conveyed. Even if the liquid repellent treatment is applied to the main surface, the liquid repellent treatment can be uniformly applied to the main surface.
  • Still another aspect of the present invention relates to a light guide plate manufacturing system.
  • This manufacturing system includes a liquid-repellent treatment part that performs liquid-repellent treatment by atmospheric pressure plasma on the main surface of a resin sheet, and a reflective dot formation that forms a plurality of reflective dots that reflect light propagating in the resin sheet on the main surface A part.
  • the liquid-repellent treatment part of the manufacturing system is configured to generate atmospheric pressure plasma between a pair of electrodes arranged opposite to each other, a sheet placement part that places a resin sheet between the pair of electrodes, and the pair of electrodes.
  • a power source that applies a voltage to the pair of electrodes; and a gas supply unit that supplies an atmospheric gas between the pair of electrodes.
  • the electrode is supplied with power corresponding to a power density of 1 W / cm 2 to 25 W / cm 2 from a power source.
  • the atmospheric gas includes argon and perfluorocarbon.
  • a light-guide plate is obtained by forming a reflective dot in the resin sheet in which the liquid-repellent process part performed.
  • Electric power corresponding to a power density of 1 W / cm 2 to 25 W / cm 2 is supplied to the electrode of the liquid repellent treatment portion, and atmospheric pressure plasma is generated under an atmosphere gas containing argon and perfluorocarbon. Generated. Since the resin sheet is subjected to the liquid repellent treatment using the atmospheric pressure plasma generated in this manner, the resin sheet is hardly damaged. As a result, the manufacturing yield of the light guide plate is improved.
  • the liquid repellent treatment unit may include two pairs of electrodes.
  • the sheet arrangement unit is a conveyance unit that conveys the resin sheet, and the first pair of electrodes and the second pair of electrodes among the two pairs of electrodes are conveyance of the resin sheet by the conveyance unit.
  • the gas supply unit is arranged so as to separate the atmospheric gas from between the first pair of electrodes and the second pair of electrodes and between the first pair of electrodes and the second pair in the transport direction. Between the pair of electrodes.
  • the second liquid repellent treatment is performed on the main surface. Therefore, desired liquid repellency can be more reliably imparted to the main surface. Furthermore, since atmospheric gas is supplied between the first pair of electrodes and between the first pair of electrodes and between the first pair of electrodes and between the second pair of electrodes, the resin sheet is conveyed. Even if the liquid repellent treatment is applied to the main surface, the liquid repellent treatment can be uniformly applied to the main surface. As a result, it is easy to form reflective dots without unevenness.
  • a liquid repellent resin sheet manufacturing method a light guide plate manufacturing method, a liquid repellent resin sheet, a liquid repellent treatment apparatus capable of avoiding damage while performing liquid repellent treatment using atmospheric pressure plasma, And a light guide plate manufacturing system.
  • FIG. 1 is a drawing schematically showing a configuration of a transmissive image display device to which a light guide plate manufactured by a method for manufacturing a light guide plate according to an embodiment of the present invention is applied.
  • FIG. 2 is a flowchart of a method for manufacturing a light guide plate according to an embodiment of the present invention.
  • FIG. 3 is a block diagram of a light guide plate manufacturing system for carrying out the light guide plate manufacturing method shown in FIG.
  • FIG. 4 is an end surface showing the configuration of the atmospheric pressure plasma processing apparatus included in the liquid repellent processing section shown in FIG.
  • FIG. 5 is a perspective view of the first electrode pair shown in FIG.
  • FIG. 6 is a drawing for explaining an example of the supply amount of the atmospheric gas.
  • FIG. 7C are diagrams schematically showing the state of transport of the resin sheet and the state of flow of the atmospheric gas.
  • FIG. 8 is an end surface showing another configuration example of the atmospheric pressure plasma processing apparatus included in the liquid repellent processing unit shown in FIG.
  • FIG. 9 is a drawing showing a step in the case of forming reflective dots by the ink jet method.
  • FIG. 10 is a drawing showing one step following FIG. 5 in the case where reflective dots are formed by the ink jet method.
  • FIG. 1 is a drawing schematically showing an example of a configuration of a transmissive image display device to which a light guide plate manufactured by a method of manufacturing a light guide plate according to an embodiment of the present invention is applied.
  • FIG. 1 shows a cross-sectional shape of a transmissive image display device.
  • the transmissive image display device 1 includes a transmissive image display unit 2 and a surface light source device 3 that is disposed on the back side of the transmissive image display unit 2 in FIG. 1 and emits planar light.
  • the transmissive image display unit 2 is illuminated with light emitted from the surface light source device 3 and displays an image.
  • An example of the transmissive image display unit 2 is a liquid crystal panel.
  • the transmissive image display device 10 is a liquid crystal display device (or a liquid crystal television).
  • the example of a liquid crystal display panel is a polarizing plate bonding body by which the polarizing plate is arrange
  • a liquid crystal cell and the polarizing plate a liquid crystal cell and a polarizing plate used in a transmissive image display device such as a conventional liquid crystal display device can be used.
  • liquid crystal cells are TFT (Thin Film Transistor) type liquid crystal cells and STN (Super Twisted Nematic) type liquid crystal cells.
  • the surface light source device 3 is an edge light type that includes a light guide plate 10 having a liquid repellent resin sheet 11 as a light guide plate base material, and a light source unit 20 disposed in the vicinity of a side surface 11c of the liquid repellent resin sheet 11. It is a surface light source device.
  • the liquid repellent resin sheet 11 is a plate-like body having a substantially rectangular or substantially square shape in plan view.
  • the liquid repellent resin sheet 11 has a pair of opposing main surfaces 11a and 11b and four side surfaces that intersect the main surfaces 11a and 11b.
  • FIG. 1 shows a pair of opposing side surfaces 11c and 11d.
  • the four side surfaces exemplify a form orthogonal to the main surfaces 11a and 11b.
  • the four side surfaces only need to intersect the main surfaces 11a and 11b.
  • the main surface 11b functions as an emission surface that emits planar light. Therefore, the main surface 11b is also referred to as an exit surface 11b.
  • the main surface 11a Since the main surface 11a is located on the back side with respect to the emission surface 11b, the main surface 11a is also referred to as a back surface 11a.
  • the planar light emitted from the emission surface 11b illuminates the transmissive image display unit 2, and the transmissive image display unit 2 displays an image using the illumination light.
  • the light source unit 20 includes a light source 21 disposed to face the side surface 11 c that is the incident surface of the light guide plate 10.
  • the distance between the light source 21 and the side surface (incident surface) 11c is usually 0.1 mm to 5 mm, preferably 2 mm or less, more preferably 1 mm or less.
  • An example of the light source 21 is a point light source.
  • point light sources include light emitting diodes, halogen lamps and tungsten lamps.
  • Examples of light emitting diodes are RGB type light emitting diodes that emit red light, green light, and blue light, and white that combines blue light emitting diodes with yellow phosphors or blue light emitting diodes with green and red phosphors. Types of light emitting diodes.
  • the light source unit 20 includes a plurality of light sources 21.
  • the plurality of light sources 21 are linearly arranged along the direction perpendicular to the thickness direction of the liquid repellent resin sheet 11 on the side surface 11c.
  • the gap between the adjacent light sources 21 and 21 is usually 1 to 2 mm.
  • the light source 21 is not limited to a point light source, and may be a linear light source such as a fluorescent tube.
  • a light source unit 20 is provided to face one side surface 11 c of the four side surfaces of the liquid repellent resin sheet 11.
  • the configuration of the surface light source device 3 is not limited to such a configuration.
  • the light source unit 20 may be provided on the pair of side surfaces 11c and 11d facing the liquid repellent resin sheet 11 or the remaining pair of side surfaces among the four side surfaces.
  • the light source part 20 may be provided with respect to all four side surfaces.
  • the light guide plate 10 includes a liquid repellent resin sheet 11 and a plurality of reflective dots 12 provided on the back surface (main surface) 11 a of the liquid repellent resin sheet 11.
  • the main component of the liquid repellent resin sheet 11 is a resin having translucency. Light diffusing particles may be dispersed in the liquid repellent resin sheet 11.
  • the liquid repellent resin sheet 11 may contain various additives such as ultraviolet absorbers, heat stabilizers, antioxidants, weathering agents, light stabilizers, optical brighteners, and processing stabilizers as necessary.
  • the translucent resin material forming the liquid repellent resin sheet 11 usually has a refractive index of 1.42 to 1.7.
  • the translucent resin material is selected from, for example, methacrylic resin, polycarbonate resin, styrene resin, cyclic olefin resin, and amorphous polyester.
  • the size of the liquid repellent resin sheet 11 is determined according to the size of the transmissive image display device 1 on which the light guide plate 10 is mounted.
  • An example of the size of the liquid repellent resin sheet 11 is 500 mm ⁇ 300 mm or more in a plan view shape. That is, an example of the size of the liquid repellent resin sheet 11 is the size of the light guide plate 10 mounted on the transmissive image display device 1 having a size of 23 inches or more.
  • Another example of the size of the liquid repellent resin sheet 11 is 220 mm ⁇ 120 mm or more in a plan view shape. That is, another example of the size of the liquid repellent resin sheet 11 is the size of the light guide plate 10 mounted on the transmissive image display device 1 having a size of 10 inches or more.
  • the thickness of the liquid repellent resin sheet 11 is 0.1 to 40 mm, preferably 0.3 to 30 mm, more preferably 1 to 10 mm.
  • the side surface 11c of the liquid repellent resin sheet 11 is preferably smoothed by a polishing process or the like.
  • the back surface 11a of the liquid repellent resin sheet 11 is subjected to a liquid repellent treatment. That is, the back surface 11a has liquid repellency.
  • the back surface 11a may have liquid repellency, for example, with a contact angle measured by dropping pure water on the back surface 11a of 85 ° to 120 °.
  • the contact angles illustrated here are contact angles measured according to the JIS R3257 sessile drop method.
  • the reflective dots 12 are formed by solidifying liquid ink.
  • methods for solidifying liquid ink include methods for curing and drying liquid ink.
  • liquid inks include UV curable inks, aqueous inks and solvent inks.
  • ultraviolet curable ink When ultraviolet curable ink is used, the liquid ink is cured by irradiating the liquid ink with ultraviolet rays from an ultraviolet ray source such as an ultraviolet lamp (UV lamp). Thereby, the reflective dots 12 made of the cured liquid ink are formed.
  • UV lamp ultraviolet lamp
  • the ink or solvent ink is used, the ink is dried by a drying device, and the reflective dots 12 are formed. Any type of ink may contain fine particles such as pigments, and may be transparent without fine particles, if necessary.
  • An example of the dot diameter of the reflective dots 12 is 20 ⁇ m or more and 120 ⁇ m or less.
  • the interval between two adjacent reflective dots 12 among the plurality of reflective dots 12 (for example, the distance between the centers of the adjacent reflective dots 12) is constant.
  • the plurality of reflective dots 12 may be formed in a predetermined pattern designed so that the luminance of the planar emitted light emitted from the emission surface 11b is uniform.
  • An example of an interval between any two adjacent reflective dots 12 among the plurality of reflective dots 12 may be 80 ⁇ m or more and 200 ⁇ m or less.
  • the light incident on the light guide plate 10 from the side surface 11 c propagates through the liquid repellent resin sheet 11 by total reflection.
  • the light reflected by the reflective dots 12 is reflected under conditions other than the total reflection condition, and is thus emitted from the emission surface 11b. In this way, part of the light propagating through the liquid repellent resin sheet 11 is emitted from the emission surface 11b, so that planar light is emitted from the emission surface 11b.
  • FIG. 2 is a flowchart showing a method for manufacturing the light guide plate 10.
  • the method of manufacturing the light guide plate 10 includes a resin sheet manufacturing process S11 for manufacturing a resin sheet, a liquid repellent process S12 for performing a liquid repellent process on the manufactured resin sheet, and a liquid repellent process. And a reflective dot forming step S13 for forming the reflective dots on the applied resin sheet.
  • FIG. 3 is a block diagram showing an example of a light guide plate manufacturing system for realizing the light guide plate manufacturing method shown in FIG.
  • the main structure of the manufacturing system 30 is typically shown as a block.
  • the manufacturing system 30 includes a resin sheet manufacturing unit 31, a liquid repellent processing unit 32, and a reflective dot forming unit 33.
  • Resin sheet manufacturing section 31 manufactures resin sheet 40 using translucent resin as a main component. That is, the resin sheet manufacturing unit 31 shown in FIG. 3 performs the resin sheet manufacturing process S11.
  • the resin sheet 40 can be obtained by a method usually employed in manufacturing a sheet member, for example, a hot press method, a melt extrusion method, an injection molding method, or the like.
  • the resin sheet manufacturing unit 31 can include an extruder to which a die is connected and a pair of pressing rolls.
  • a molten resin obtained by melting a resin that is a material of the resin sheet 40 is supplied to the extruder.
  • the extruder supplied with the molten resin forms a long resin sheet by continuously extruding the molten resin from the die.
  • the long resin sheet continuously extruded from the die is adjusted in thickness and the like by being pressed in the thickness direction by a pair of pressing rolls.
  • a long resin sheet is cut into a predetermined length to obtain a plurality of resin sheets.
  • the size of the resin sheet at this stage is larger than the resin sheet for the light guide plate. Therefore, a plurality of resin sheets are stacked and the outer periphery (that is, the side surface) is cut. By this cutting process, a plurality of resin sheets 40 having a desired size are obtained.
  • the liquid repellent treatment unit 32 performs a liquid repellent treatment on at least one main surface of the pair of main surfaces 40 a and 40 b of the resin sheet 40 manufactured by the resin sheet manufacturing unit 31. That is, the liquid repellent processing unit 32 performs the liquid repellent processing step S12 shown in FIG.
  • the liquid repellent processing unit 32 processes the plurality of resin sheets 40 one by one.
  • the liquid repellent treatment unit 32 includes the atmospheric pressure plasma treatment apparatus 50 shown in FIG.
  • FIG. 4 is an end view schematically showing a configuration of an example of an atmospheric pressure plasma processing apparatus.
  • the atmospheric pressure plasma processing apparatus 50 is a liquid repellent resin sheet manufacturing apparatus.
  • “atmospheric pressure” means 0.8 atm (atm) or more and 1.2 atm (atm) or less.
  • FIG. 4 in order to show the conveyance state of the resin sheet 40, the movement position of the resin sheet 40 is shown with the dashed-two dotted line. Similarly, the movement state of the resin sheet 40 is also indicated by a two-dot chain line in the other drawings.
  • the main surface 40a is referred to as an upper surface 40a
  • the main surface 40b is referred to as a lower surface 40b.
  • the atmospheric pressure plasma processing apparatus 50 includes a chamber 51, a first electrode pair 52 and a second electrode pair 53 accommodated in the chamber 51, and a plurality of transport rollers as a transport unit that transports the resin sheet 40. 54, a power supply 55 that applies an alternating voltage to the first and second electrode pairs 52 and 53, and a gas supply unit 56 that supplies the atmospheric gas G to the chamber unit 51.
  • the chamber part 51 has a liquid repellent treatment space 511 for performing a liquid repellent process in the chamber part 51 inside.
  • the resin sheet 40 transported by the transport roller 54 is transported into the chamber portion 51 and the resin sheet 40 subjected to the liquid repellent treatment from the inside of the chamber portion 51, that is, A carry-out port 51b for carrying out the liquid repellent resin sheet 11 is formed.
  • Electrodes 521 and 532 are provided on the lower wall 513 of the chamber portion 51 so as to face the electrodes 521 and 531, respectively.
  • the electrodes 522 and 532 can be attached to a recess formed in the lower wall 513.
  • the second electrode pair 53 is located on the downstream side of the first electrode pair 52 in the conveying direction of the resin sheet 40, and the second electrode pair 53 is separated from the first electrode pair 52.
  • An example of the distance L 12 (see FIG. 6) between the first electrode pair 52 and the second electrode pair 53 in the conveying direction of the resin sheet 40 is 100 mm to 150 mm.
  • FIG. 5 is a perspective view of the first electrode pair.
  • white arrows indicate the conveyance direction of the resin sheet 40.
  • the planar view shape of the electrodes 521 and 522 (the shape when viewed from the thickness direction of the electrodes) is a rectangle.
  • the size of the electrodes 521 and 522 can be determined according to the size of the resin sheet 40.
  • the length L1 of the electrodes 521 and 522 in the transport direction of the resin sheet 40 is usually shorter than the length of the resin sheet 40.
  • An example of the length L1 is 20 mm to 40 mm.
  • An example of the width L2 of the electrodes 521 and 522 that is, the length in the direction orthogonal to the transport direction of the resin sheet 40 and the thickness direction of the electrodes is 400 mm to 900 mm.
  • the width L2 of the electrodes 521 and 522 is longer than the width of the resin sheet 40, a region outside the passage region of the resin sheet 40 between the electrodes 521 and 521 is formed from a dielectric as shown in FIG.
  • the configured spacers S1 and S2 may be provided. When the spacers S1 and S2 are arranged, plasma discharge is generated in a region between the spacer S1 and the spacer S2.
  • the sheet 40 can be subjected to a liquid repellent treatment.
  • the distance L4 between the electrodes 521 and 522 is the upper surface (main surface) 40a of each of the electrodes 521 and 522 and the resin sheet 40 in a state where the resin sheet 40 is disposed between the electrodes 521 and 522 (see FIG. 4). Is a distance at which a gap of at least 0.5 mm or more, preferably 1 mm or more occurs.
  • An example of the distance L4 is 3 mm to 8 mm, preferably 4 mm to 6 mm.
  • the distance L4 between the electrodes 521 and 522 can be adjusted, for example, by moving the electrode 521 up and down by an elevating mechanism (not shown).
  • the atmospheric pressure plasma processing apparatus 50 includes the lifting mechanism, the liquid repellent treatment can be performed on a plurality of resin sheets 40 having different thicknesses by one atmospheric pressure plasma processing apparatus 50.
  • the configuration of the electrodes 531 and 532 can be the same as the configuration of the electrodes 521 and 522. However, the length L1 of the electrodes 531 and 532, the width L2 of the electrodes 531 and 532, and the distance L4 between the electrodes 531 and 532 in the transport direction of the resin sheet 40 are within the ranges exemplified for the electrodes 521 and 522. If it is.
  • the transport roller 54 in the chamber section 51 is attached to the lower wall 513 of the chamber section 51 so as to be rotatable around the rotation axis.
  • the transport rollers 54 disposed before and after the chamber portion 51 in the transport direction of the resin sheet 40 may be supported by the support portion so as to be rotatable around the rotation axis.
  • the conveyance roller 54 is disposed so as to convey the resin sheet 40 while supporting the resin sheet 40 so that the distance between the resin sheet 40 and the electrodes 522 and 532 is not less than 0 and not more than 1 mm. If there is a slight gap between the resin sheet 40 and the electrodes 522 and 532, the lower surface 40 b located on the opposite side of the upper surface 40 a of the resin sheet 40 is not covered by the electrodes 522 and 532. In this case, the resin sheet 40 can be smoothly conveyed and the lower surface 40b of the resin sheet 40 can be prevented from being damaged.
  • the arrangement of the resin sheet 40 between the electrode 521 and the electrode 522 and between the electrode 531 and the electrode 532 can be performed by the transport roller 54. Therefore, the conveyance roller 54 functions as a sheet arrangement portion for arranging the resin sheet 40 between the electrodes 521 and 522 and the electrodes 531 and 532 with respect to the atmospheric pressure plasma processing apparatus 50.
  • the power source 55 is electrically connected to the first electrode pair 52 and the second electrode pair 53.
  • the electrical wiring is schematically shown by broken lines.
  • the power supply 55 supplies a voltage for generating atmospheric pressure plasma between the electrode 521 and the electrode 522 and between the electrode 531 and the electrode 532 to the first electrode pair 52 and the second electrode pair 53, respectively.
  • the power source 55 is a high-frequency power source (or an AC power source) having a voltage waveform frequency of 1 kHz to 100 MHz.
  • One end of the power source 55 is electrically connected to the electrode 521 and the electrode 531.
  • the other end of the power supply 55 is electrically connected to the electrode 522 and the electrode 532.
  • the electrode 521 and the electrode 531 have the same potential, and the electrode 522 and the electrode 532 have the same potential.
  • the phase of the voltage applied to the electrode 521 and the electrode 531 is opposite to the phase of the voltage applied to the electrode 522 and the electrode 532.
  • the power supply 55 is a voltage at which the power density contributing to the generation of atmospheric pressure plasma is 1 W / cm 2 or more and 25 W / cm 2 or less to the electrodes 521, 522, 531, 532 included in the first and second electrode pairs 52, 53. Supply.
  • Preferable examples of the power density contributing to atmospheric pressure plasma generation are 2 W / cm 2 or more and 15 W / cm 2 , more preferably 2 W / cm 2 or more and 8 W / cm 2 , and still more preferable examples are 2 W / cm 2.
  • the above is 4 W / cm 2 . As shown in FIG.
  • the power density contributing to the generation of atmospheric pressure plasma means that the spacers S1 and S2 in the electrode 521 (or electrode 522) and the electrode 531 (or electrode 532) when the spacers S1 and S2 are used. Between the electrodes 521, 522, 531 and 532 in the electrical wiring relationship between the power supply 55 and the first and second electrode pairs 52 and 53 shown in FIG. The power density specified by
  • the gas supply unit 56 includes a gas supply path 561 that supplies the atmospheric gas G into the chamber unit 51 from between the first electrode pair 52 and the second electrode pair 53 in the conveyance direction of the resin sheet 40.
  • the gas supply path 561 passes through the upper wall 512 so that one end thereof communicates with the liquid repellent treatment space 511.
  • One end of the gas supply path 561 may be between the first electrode pair 52 and the second electrode pair 53.
  • one end of the gas supply path 561 is the first in the conveying direction of the resin sheet 40. It may be the central part of the electrode pair 52 and the second electrode pair 53.
  • the other end of the gas supply path 561 is connected to a gas supply source 562 of the atmospheric gas G.
  • An example of the gas supply path 561 is a gas supply pipe.
  • a portion of the gas supply path 561 in the upper wall 512 may be a through hole formed in the upper wall 512. In this case, the through hole and the gas supply source 562 may be connected by piping.
  • the atmospheric gas G supplied from the gas supply path 561 is a mixed gas of argon (Ar) and perfluorocarbon (PFC).
  • the atmospheric gas G may contain a gas other than argon (Ar) and perfluorocarbon (PFC) as long as it does not depart from the spirit of the present invention.
  • the concentration of PFC in the atmospheric gas G can be 0.10 volume% or more and 3.0 volume% or less, preferably 0.15 volume% or more and 1.3 volume% or less with respect to Ar.
  • An example of PFC contained in the atmospheric gas G is carbon tetrafluoride (CF 4 ).
  • examples of PFC include CF 4 , carbon hexafluoride (C 2 F 6 ), propylene hexafluoride (CF 3 CFCF 2 ), cyclofluorobutane octafluoride (C 4 F 8 ), and octafluoropropane ( C 3 F 8 ).
  • the gas supply source 562 has a tank for storing Ar and PFC, and is 0.10 volume% or more and 3.0 volume% or less, preferably 0.15 volume% or more and 1.3 volume% or less with respect to Ar. As such, Ar and PFC may be supplied from each tank at a predetermined flow rate. However, the gas supply source 562 may include a tank that stores the atmospheric gas G in which Ar and PFC are mixed in advance, and supply the atmospheric gas G from the tank.
  • a gas discharge path is provided on the upstream side of the first electrode pair 52 and the downstream side of the second current pair 53 in the transport direction of the resin sheet 40.
  • 57 is provided on the upper wall 512.
  • the end of the gas discharge path 57 opposite to the liquid repellent treatment space 511 is connected to a gas discharge device (not shown).
  • An example of the gas discharge path 57 is a gas discharge pipe.
  • a portion in the upper wall 512 of the gas discharge path 57 may be a through hole formed in the upper wall 512.
  • the supply amount of the atmospheric gas supplied from the gas supply path 561 is such that oxygen is not substantially present between the liquid repellent treatment space 511, particularly between the electrode 521 and the electrode 522 and between the electrode 531 and the electrode 532. Any amount is sufficient.
  • FIG. 6 is a drawing for explaining an example of the supply amount of the atmospheric gas.
  • the plasma in which the space between the electrodes 521 and 531 and the upper surface 40a of the resin sheet 40 (the hatched area in FIG. 4) substantially contributes to the liquid repellent treatment is generated. It is a discharge area.
  • the sum of the volume of the space between the electrode 521 and the upper surface 40a and the volume of the space between the electrode 531 and the upper surface 40a is referred to as an effective volume V of the plasma discharge space.
  • the space between the electrode 521 and the upper surface 40a refers to the upper surface 40a and the electrode in the region sandwiched between the electrode 521 and the electrode 522 when the resin sheet 40 is disposed between the electrode 521 and the electrode 522.
  • the space between the electrode 531 and the main surface 40 a is the upper surface 40 a in the region between the electrode 531 and the electrode 532 in the state where the resin sheet 40 is disposed between the electrode 531 and the electrode 532.
  • the supply amount of the atmospheric gas G is an amount corresponding to a volume of 3 to 300 times the effective volume V converted to normal temperature (25 ° C.) and normal pressure (1 atm) per second.
  • a process (liquid repellent process S12) of performing a liquid repellent process on the upper surface 40a of the resin sheet 40 using the atmospheric pressure plasma processing apparatus 50 shown in FIG. 4 will be described.
  • the atmospheric gas G is supplied from the gas supply unit 56 into the chamber unit 51, and the power source 55 is driven so that the atmospheric gas G between the electrode 521 and the electrode 522
  • the atmosphere gas G between the electrode 531 and the electrode 532 is turned into plasma. That is, atmospheric pressure plasma is generated between the electrode 521 and the electrode 522 and between the electrode 531 and the electrode 532.
  • the components of the atmospheric gas G and the power density for generating the atmospheric pressure plasma are as described above.
  • the resin sheet 40 is carried into the chamber portion 51 through the carry-in port 51a by the carrying roller 54.
  • the resin sheet 40 carried into the chamber 51 passes between the electrode 521 and the electrode 522 at a constant speed by the transport roller 54.
  • the upper surface 40a of the resin sheet 40 is subjected to the liquid repellent treatment by the atmospheric pressure plasma (first liquid repellent treatment step). That is, the first liquid repellent treatment is performed on the resin sheet 40 by passing between the electrode 521 and the electrode 522 constituting the first electrode pair 52.
  • the resin sheet 40 further passes between the electrode 531 and the electrode 532 by the transport roller 54.
  • the resin sheet 40 is again subjected to the liquid repellent treatment (second liquid repellent treatment step). That is, the second liquid repellent treatment is performed on the upper surface 40 a by passing between the electrode 531 and the electrode 532 constituting the second electrode pair 53.
  • the liquid repellent resin sheet 11 which is the resin sheet 40 subjected to the liquid repellent treatment is carried out of the system of the atmospheric pressure plasma processing apparatus 50 (that is, outside the apparatus) from the carry-out port 51b by the transport roller 54.
  • the liquid repellent treatment time of the upper surface 40 a can be adjusted by the transport speed of the resin sheet 40.
  • the conveyance speed of the resin sheet 40 can be controlled by adjusting the rotation speed of the conveyance roller 54.
  • a resin sheet 40 having a top surface 40a having liquid repellency with a contact angle of 85 ° to 120 ° measured by dropping pure water is obtained.
  • the resin sheet 40 subjected to the liquid repellent treatment by the liquid repellent treatment unit 32 is the liquid repellent resin sheet 11.
  • the main surface 40a subjected to the liquid repellent treatment corresponds to the main surface 11a.
  • 7 (a) to 7 (c) are drawings schematically showing the state of transport of the resin sheet and the flow state of the atmospheric gas.
  • FIG. 7A schematically shows a case where the resin sheet 40 is positioned between the electrode 521 and the electrode 522.
  • the space in which the atmospheric gas G flows on the second electrode pair 53 side is larger than that on the first electrode pair 52 side. narrow. As a result, the atmospheric gas G tends to flow to the second electrode pair 53 side.
  • FIG. 7B shows a state in which the resin sheet 40 is transported to the second electrode pair 53 side from the case of FIG.
  • the space through which the atmospheric gas G flows is the first electrode pair 52 side. It is almost the same on the second electrode pair 53 side. As a result, the atmospheric gas G tends to flow evenly toward the first electrode pair 52 and the second electrode pair 53 side.
  • FIG.7 (c) has shown the state by which the resin sheet 40 was conveyed by the 2nd electrode pair 53 side rather than the case of FIG.7 (b).
  • FIG. 7C since the resin sheet 40 is located between the electrode 531 and the electrode 532, the atmosphere gas G tends to flow to the first electrode pair 52 side, contrary to the case of FIG. .
  • FIG. 4 shows a configuration example of the atmospheric pressure plasma processing apparatus 50 in which the gas discharge path 57 is provided on the upper wall 512.
  • the chamber portion 51 may be covered with the exhaust cover portion 61 as in the atmospheric pressure plasma processing apparatus 60 shown in FIG.
  • the exhaust cover portion 61 only needs to have the carry-in port 61a and the carry-out port 61b formed at positions corresponding to the carry-in port 51a and the carry-out port 51b.
  • the exhaust pipe 62 communicating with the exhaust cover 61 may be connected to a gas exhaust device (not shown).
  • the reflective dot formation part 33 implements reflective dot formation process S13.
  • the reflective dot forming unit 33 forms the reflective dots 12 by, for example, ink jet printing (or ink jet method) or screen printing.
  • An example of the reflective dot forming unit 33 and the reflective dot forming step S13 will be specifically described in the case of using inkjet printing.
  • the reflective dot forming unit 33 includes a printing unit 331 (see FIG. 9) that prints the liquid ink I in a predetermined pattern on the main surface 40a, and a liquid ink that solidifies the liquid ink I.
  • a solidifying unit 332 (see FIG. 10).
  • “printing” means dropping the liquid ink I in a predetermined pattern.
  • An example of the printing unit 331 is an inkjet head.
  • An example of the liquid ink solidifying unit 332 is an ultraviolet ray source such as an ultraviolet lamp.
  • the liquid ink solidifying unit 332 is a liquid ink curing unit.
  • FIG. 9 is a drawing showing a step in the case of forming reflective dots by the ink jet method.
  • FIG. 10 is a drawing showing one step following FIG. 9 in the case of forming reflective dots by the ink jet method.
  • FIG. 10 schematically shows an ultraviolet ray source as an example of the liquid ink solidifying unit 332.
  • the liquid ink I is dropped in a predetermined pattern on the main surface 11a of the liquid repellent resin sheet 11 by relatively scanning the positions of the printing unit 331 and the liquid repellent resin sheet 11 (liquid ink). Step of dripping.
  • the dropped liquid ink I is cured by the liquid ink solidifying unit 332, whereby the reflective dots 12 can be formed (step of solidifying the liquid ink).
  • the liquid ink solidifying unit 332 is an ultraviolet ray source.
  • the liquid ink solidifying unit 332 may be anything according to the characteristics of the liquid ink I.
  • a drying device that dries the liquid ink and solidifies the liquid ink instead of a device that cures the liquid ink such as an ultraviolet ray source may be used.
  • the liquid ink I can be a water-soluble ink.
  • the reflective dot forming unit 33 forms the reflective dots 12 having a dot diameter of 20 ⁇ m or more and 120 ⁇ m or less.
  • the adjustment of the dot diameter can be adjusted by the dropping amount of the liquid ink I.
  • the reflection dot forming unit 33 is configured such that the interval between the two adjacent reflection dots 12 is 80 ⁇ m or more and 200 ⁇ m or less.
  • a plurality of reflective dots 12 may be formed. The interval between two adjacent reflective dots 12 can be adjusted by the position where the liquid ink I is dropped. If the interval between two adjacent reflective dots 12 arbitrarily selected from the plurality of reflective dots 12 is within the above range, the dots do not stick to each other.
  • the liquid-repellent resin sheet can be manufactured by the resin sheet manufacturing step S11 by the resin sheet manufacturing unit 31 and the liquid-repellent processing step S12 by the liquid-repellent processing unit 32. Therefore, the resin sheet manufacturing step S11 in FIG. 2 and the liquid repellent treatment step S12 by the liquid repellent treatment unit 32 correspond to the steps of manufacturing the liquid repellent resin sheet.
  • the atmospheric pressure plasma processing apparatus 50 as the liquid repellent resin sheet manufacturing apparatus described above, the manufacturing system 30 including the same, the method of manufacturing the liquid repellent resin sheet, and the effect of the method of manufacturing the light guide plate including the same will be described. .
  • the resin sheet 40 In order to generate atmospheric pressure plasma during the liquid repellent treatment, power corresponding to a power density of 1 W / cm 2 to 25 W / cm 2 is supplied to the first electrode pair 52 and the second electrode pair 53, respectively. Is done. Since the resin sheet 40 is subjected to a liquid repellent treatment using atmospheric pressure plasma generated by 1 W / cm 2 to 25 W / cm 2 , the resin sheet 40 is not easily damaged, and is used for atmospheric pressure plasma treatment due to abnormal discharge. The apparatus (for example, the atmospheric pressure plasma apparatus 50) is not easily damaged. As a result, the manufacturing yield of the light guide plate 10 in which the reflective dots 12 using the liquid ink I are formed on the resin sheet 40 subjected to the liquid repellent treatment is improved.
  • the first electrode pair 52 and the second electrode pair 53 preferably have power corresponding to a power density of 2 W / cm 2 to 15 W / cm 2.
  • the resin sheet 40 is more unlikely to be damaged and is greatly damaged by abnormal discharge.
  • An apparatus for atmospheric pressure plasma processing (for example, the atmospheric pressure plasma apparatus 50) is further less likely to be damaged.
  • the manufacturing yield of the light guide plate 10 in which the reflective dots 12 using the liquid ink I are formed on the resin sheet 40 subjected to the liquid repellent treatment can be further improved.
  • the power density (for example, 30 W / cm 2 to 30 ⁇ m) conventionally employed in the liquid repellent treatment using atmospheric pressure plasma. Even if the power density is lower than 100 W / cm 2 ), the resin sheet 40 can be subjected to a desired liquid repellent treatment.
  • the liquid repellent treatment using the atmospheric pressure plasma processing apparatus 50 illustrated in FIG. 4 is performed twice for one resin sheet 40. That is, the first liquid repellent treatment using atmospheric pressure plasma between the electrode 521 and the electrode 522 and the second liquid repellent treatment using atmospheric pressure plasma between the electrode 531 and the electrode 532 are transported. While being implemented. Therefore, the desired liquid repellent treatment can be more reliably performed on the upper surface 40a of the resin sheet 40.
  • the atmosphere gas G is generated between the first electrode pair 52 and the second electrode pair 53 in the transport direction of the resin sheet 40. Is supplied into the chamber portion 51. Therefore, as described with reference to FIGS. 7A to 7C, the non-uniformity of liquid repellency on the upper surface 40a is reduced. Therefore, when the light guide plate 10 that is a resin sheet with reflective dots is manufactured using the liquid repellent resin sheet 11, the non-uniformity of the dot diameter of the reflective dots 12 is eliminated. As a result, the light guide plate 10 in which unevenness due to the non-uniformity of the reflective dot diameter is reduced is obtained. Therefore, the light guide plate 10 can be efficiently manufactured while suppressing appearance defects.
  • the larger the resin sheet 40 tends to cause non-uniformity of the liquid repellent processing.
  • the larger resin sheet 40 can be subjected to the liquid repellent treatment more uniformly.
  • the height of the reflective dots 12 can be increased. Since the higher the reflective dots 12 are, the higher the brightness emitted from the light guide plate 10 tends to be, the light guide plate 10 can obtain emitted light with higher brightness.
  • the desired dot diameter is controlled while suppressing the connection of the reflective dots 12 to each other.
  • the reflective dots 12 having the same can be formed.
  • a liquid repellent resin sheet 11 constituting the light guide plate 10 was prepared as follows. First, the resin sheet 40 used as the liquid repellent resin sheet 11 was prepared. The size of the resin sheet 40 was 370 mm ⁇ 320 mm ⁇ 4 mm. The material constituting the resin sheet 40 is polymethyl methacrylate. The top surface 40a of the polymethyl methacrylate resin sheet 40 was subjected to a liquid repellent treatment using the atmospheric pressure plasma processing apparatus 60 shown in FIG.
  • Example 1 the electrodes 521, 522, 531 and 532 having a substantially rectangular shape in plan view were employed.
  • the length L1 of each electrode 521, 522, 531, 532 was 20 mm, and the length L2 was 400 mm.
  • the distance L4 between the electrode 521 and the electrode 522 and between the electrode 531 and the electrode 532 was 6 mm.
  • the distance L 12 between the first electrode pair 52 and the second electrode pair 53 was 135mm.
  • the atmospheric gas G used for the atmospheric pressure plasma generated in the atmospheric pressure plasma processing apparatus 50 was a mixed gas of Ar and CF 4 .
  • the concentration of CF 4 with respect to Ar was 0.33% by volume.
  • the concentration of CF 4 with respect to Ar was realized by supplying Ar into the chamber 51 at a flow rate of 150 L / min and CF 4 at 0.5 L / min.
  • the oxygen concentration in the chamber part 51 was 1000 ppm or less.
  • the resin sheet 40 is inserted between the electrode 521 and the electrode 522 discharged by the conveyance roller 54 and between the electrode 531 and the electrode 532 at a conveyance speed of 5 m / min to repel the upper surface 40 a of the resin sheet 40.
  • Liquid treatment was applied.
  • the distance between the lower surface 40b of the resin sheet 40 and the electrodes 522 and 532 facing the lower surface 40b is 0.5 mm
  • the electrodes facing the upper surface 40a and the upper surface 40a of the resin sheet 40 The distance between 521 and 531 was 1.5 mm.
  • the volume of the atmospheric gas G that flows in per second was 104 times the effective volume V of the plasma discharge space that substantially contributes to the liquid repellent treatment.
  • the liquid repellent resin sheet 11 was manufactured, the presence or absence of damage to the liquid repellent resin sheet 11 was visually evaluated. And if there was no abnormality visually, the manufactured liquid repellent resin sheet 11 was evaluated as "no damage". As described above, the liquid repellent resin sheet 11 is visually evaluated. However, in the apparatuses used in Example 1 and other examples, the power density is excessive (for example, 30 W / cm 2 to 100 W / cm as in the past). If 2 ), before the resin sheet 40 is damaged, abnormal discharge may occur and the device may be damaged. In Example 1, such a device was not damaged.
  • the liquid-repellent resin sheet 11 of Example 1 was not damaged, a plurality of reflective dots 12 were formed in a predetermined pattern on the liquid-repellent main surface 11a of the manufactured liquid-repellent resin sheet 11. As a result, the light guide plate 10 was obtained.
  • the reflective dots 12 were performed using the ink jet printing described above. The diameter of the reflective dot was about 70 ⁇ m.
  • the contact angle measured by dropping pure water on the liquid repellent main surface 11a of the liquid repellent resin sheet 11 produced in Example 1 was 93.2 °.
  • the contact angle was measured according to the JIS R3257 sessile drop method.
  • Example 2 In the liquid repellent treatment, a liquid repellent resin sheet 11 and a light guide plate 10 were obtained in the same manner as in Example 1 except that the following points were changed.
  • a power of 2.4 kW was supplied to the first and second electrode pairs 52 and 53 electrically connected to the power source 55.
  • a voltage of 12 kV was applied between the electrodes 521 and 522 and between the electrodes 531 and 532.
  • the conveyance speed of the resin sheet 40 was changed to 10 m / min.
  • the distance between the lower surface 40b and the electrodes 522 and 532 was changed to 1.0 mm
  • the distance between the upper surface 40a and the electrodes 521 and 531 was changed to 1.0 mm.
  • the apparatus was not broken. Moreover, when the manufactured liquid-repellent resin sheet 11 was visually evaluated, no abnormality was observed. Further, the contact angle of the main surface 11a of the manufactured liquid repellent resin sheet 11 was measured in the same manner as in Example 1. The contact angle obtained was 91.5 °.
  • Example 3 A liquid repellent resin sheet 11 and a light guide plate 10 were obtained in the same manner as in Example 1 except that a 535 mm ⁇ 311 mm ⁇ 3 mm resin sheet was used and the following points were changed in the liquid repellent treatment. .
  • the lengths L1, L2, and L4 were changed to 40 mm, 820 mm, and 5 mm, respectively.
  • the length L3 between the spacers S1 and S2 was set to 575 mm.
  • a first electrode pair 52 a distance L 12 between the second electrode pair 53 was changed to 150 mm.
  • a power of 1.5 kW was supplied to the first and second electrode pairs 52 and 53 electrically connected to the power supply 50.
  • the power density at the electrodes 521, 522, 531 and 532 is 3.3 W / cm 2 .
  • the conveyance speed of the resin sheet 40 was 10 m / min.
  • the distance between the lower surface 40b and the electrodes 522 and 532 was changed to 1.0 mm, and the distance between the upper surface 40a and the electrodes 521 and 531 was changed to 1.0 mm.
  • liquid-repellent resin sheet 11 was manufactured by changing the liquid-repellent treatment conditions as described above, the apparatus was not broken. Moreover, when the manufactured liquid-repellent resin sheet 11 was visually evaluated, no abnormality was observed.
  • Example 4 A liquid repellent resin sheet 11 and a light guide plate 10 were obtained in the same manner as in Example 3 except that a 525 mm ⁇ 301 mm ⁇ 2 mm resin sheet was used and the following points were changed in the liquid repellent treatment. . -The length L4 was changed to 4 mm. -The length L3 between the spacers S1 and S2 was changed to 565 mm. A power of 1.3 kW was supplied to the first and second electrode pairs 52 and 53 electrically connected to the power supply 55. The power density at the electrodes 521, 522, 531 and 532 is 2.9 W / cm 2 .
  • liquid-repellent resin sheet 11 was manufactured by changing the liquid-repellent treatment conditions as described above, the apparatus was not broken. Moreover, when the manufactured liquid-repellent resin sheet 11 was visually evaluated, no abnormality was observed.
  • Example 5 A liquid repellent resin sheet 11 and a light guide plate 10 were obtained in the same manner as in Example 3 except that a 587 mm ⁇ 1028 mm ⁇ 3 mm resin sheet was used and the following points were changed in the liquid repellent treatment. . -The length L3 between the spacers S1 and S2 was changed to 627 mm. ⁇ CF 4 was changed to a concentration of 1.0% by volume. This CF 4 concentration was realized by supplying Ar into the chamber 51 at a flow rate of 280 L / min and CF 4 at 2.8 L / min.
  • Example 5 While the length L3 was changed to 627 mm, the power was 1.5 kW as in Example 3. Therefore, in Example 5, the power density at the electrodes 521, 522, 531 and 532 was 3.0 W / cm. 2 .
  • liquid-repellent resin sheet 11 was manufactured by changing the liquid-repellent treatment conditions as described above, the apparatus was not broken. Moreover, when the manufactured liquid-repellent resin sheet 11 was visually evaluated, no abnormality was observed.
  • Table 1 shows the evaluation results of the unevenness of the pattern of the reflective dots 12 in the light guide plate 10 of Examples 1 to 5.
  • the obtained light guide plate 10 was held over a light source, and unevenness was evaluated by looking at the pattern of the plurality of reflective dots 12 from the non-printed surface, that is, the surface where the reflective dots 12 were not formed.
  • the unevenness was evaluated in the following three stages.
  • the reflective dots 12 corresponding to a predetermined pattern can be formed. That is, liquid repellency can be imparted uniformly to a predetermined surface of the resin sheet 40.
  • the liquid repellent treatment apparatus has the first electrode pair 52 and the second electrode pair 53, but the electrode pair may be one set or three or more sets.
  • the electrode pair may be one set or three or more sets.
  • a space region into which the atmospheric gas G can flow between the electrodes 521 and 522 and between the electrodes 531 and 532 changes with time.
  • the liquid repellency treatment is performed twice or more on the main surface 40a, so that the liquid repellency can be imparted to the main surface 40a more uniformly.
  • the liquid repellent treatment may be performed on the long resin sheet 40 without being limited to the example in which the plurality of resin sheets 40 are processed by using the liquid repellent treatment apparatus.
  • the liquid repellent treatment is performed on the upper surface 40a of the resin sheet 40 has been specifically described, but the liquid repellent treatment may be performed on one of the upper surface 40a and the lower surface 40b.
  • both the upper surface 40a and the lower surface 40b are subjected to liquid repellency treatment, they contribute to the liquid repellency treatment between the upper surface 40a and the electrode facing the lower surface 40b and between the lower surface 40b and the electrode facing the lower surface 40b.
  • a plasma discharge space may be formed.
  • the effective volume V is the sum of the volumes of the plasma discharge space that contributes to all the liquid repellent treatments.
  • the power source 55 is not particularly limited as long as an AC voltage that generates atmospheric pressure plasma can be applied to a pair of electrodes for generating atmospheric pressure plasma.
  • the power source for generating atmospheric pressure plasma may be a pulse power source, or a combination of a pulse power source and a sine wave generator. Examples of characteristics of a pulse power source that can be used for generating plasma are as follows. That is, the repetition frequency is 1 MHz or less, the waveform rise time is 100 ⁇ sec or less, and the pulse application time is 1 msec or less. Further, the frequency of the AC voltage and the applied waveform for generating the AC voltage are not particularly limited.
  • a plurality of transport rollers 54 arrange the resin sheet 40 between a pair of electrodes facing each other.
  • the sheet placement unit is not limited to the transport roller 54 as long as the resin sheet 40 can be placed between a pair of electrodes facing each other.
  • a stand on which the resin sheet 40 is placed may be used.
  • the liquid repellent resin sheet 11 can be manufactured by performing the resin sheet manufacturing step S11 and the liquid repellent treatment step S12. Therefore, the resin sheet manufacturing step S11 and the liquid repellent treatment step S12 correspond to a method for manufacturing a liquid repellent resin sheet. However, for example, when an existing resin sheet is used, the resin sheet manufacturing step S11 may not be provided.
  • the liquid repellent resin sheet 11 is not limited to being applied to the light guide plate 10.
  • the liquid repellent resin sheet 11 can be applied to an optical component using a liquid repellent surface.
  • second electrode pair (second pair of electrodes) Electrodes
  • 531, 532 (a pair of opposing electrodes)
  • 55 ... a power source 55 ... a gas supply unit
  • G atmosphere gas.

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PCT/JP2013/052233 2012-02-01 2013-01-31 撥液性樹脂シートの製造方法、導光板の製造方法、撥液性樹脂シートの製造装置及び導光板の製造システム WO2013115324A1 (ja)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07189114A (ja) * 1991-03-07 1995-07-25 Kimoto & Co Ltd 表面改質繊維及び織物
JPH10298318A (ja) * 1997-04-23 1998-11-10 Sekisui Chem Co Ltd 放電プラズマを利用した表面処理方法
JPH1161406A (ja) * 1997-08-27 1999-03-05 Sekisui Chem Co Ltd 反射・帯電防止膜の製造方法
JPH11133205A (ja) * 1997-04-21 1999-05-21 Sekisui Chem Co Ltd 反射防止膜の製造方法
JP2004070301A (ja) * 2002-06-11 2004-03-04 Konica Minolta Holdings Inc 表面処理方法及び光学部品
JP2007030438A (ja) * 2005-07-29 2007-02-08 Seiko Epson Corp 光学板、バックライトユニット、電気光学装置及び電子機器、並びに光学板の製造方法及び液滴吐出装置
JP2009288413A (ja) * 2008-05-28 2009-12-10 Konica Minolta Opto Inc ハードコートフィルムの製造方法、ハードコートフィルム、反射防止フィルム、偏光板、及び画像表示装置
JP2012178345A (ja) * 2011-02-02 2012-09-13 Sumitomo Chemical Co Ltd 導光板、面光源装置、透過型画像表示装置、導光板の製造方法及び導光板用紫外線硬化型インクジェットインク

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101167534B1 (ko) * 2003-04-25 2012-07-23 가부시키가이샤 한도오따이 에네루기 켄큐쇼 패턴의 제작방법 및 액적 토출장치
JP2005085799A (ja) * 2003-09-04 2005-03-31 Seiko Epson Corp 成膜方法、配線パターンの形成方法、半導体装置の製造方法、電気光学装置、及び電子機器
JP2006350179A (ja) * 2005-06-20 2006-12-28 Seiko Epson Corp 光学基板、光学基板の製造方法、面状照明装置及び電気光学装置
TWI381078B (zh) * 2008-10-09 2013-01-01 Atomic Energy Council 高分子材料之大氣電漿撥水與撥油改質結構及其改質方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07189114A (ja) * 1991-03-07 1995-07-25 Kimoto & Co Ltd 表面改質繊維及び織物
JPH11133205A (ja) * 1997-04-21 1999-05-21 Sekisui Chem Co Ltd 反射防止膜の製造方法
JPH10298318A (ja) * 1997-04-23 1998-11-10 Sekisui Chem Co Ltd 放電プラズマを利用した表面処理方法
JPH1161406A (ja) * 1997-08-27 1999-03-05 Sekisui Chem Co Ltd 反射・帯電防止膜の製造方法
JP2004070301A (ja) * 2002-06-11 2004-03-04 Konica Minolta Holdings Inc 表面処理方法及び光学部品
JP2007030438A (ja) * 2005-07-29 2007-02-08 Seiko Epson Corp 光学板、バックライトユニット、電気光学装置及び電子機器、並びに光学板の製造方法及び液滴吐出装置
JP2009288413A (ja) * 2008-05-28 2009-12-10 Konica Minolta Opto Inc ハードコートフィルムの製造方法、ハードコートフィルム、反射防止フィルム、偏光板、及び画像表示装置
JP2012178345A (ja) * 2011-02-02 2012-09-13 Sumitomo Chemical Co Ltd 導光板、面光源装置、透過型画像表示装置、導光板の製造方法及び導光板用紫外線硬化型インクジェットインク

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