WO2012027973A1 - 抗刮伤光学扩散薄膜、液晶显示装置及照明装置 - Google Patents

抗刮伤光学扩散薄膜、液晶显示装置及照明装置 Download PDF

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Publication number
WO2012027973A1
WO2012027973A1 PCT/CN2011/070276 CN2011070276W WO2012027973A1 WO 2012027973 A1 WO2012027973 A1 WO 2012027973A1 CN 2011070276 W CN2011070276 W CN 2011070276W WO 2012027973 A1 WO2012027973 A1 WO 2012027973A1
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WO
WIPO (PCT)
Prior art keywords
diffusion
film
particles
optical diffusion
substrate
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PCT/CN2011/070276
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English (en)
French (fr)
Inventor
张彦
金亚东
Original Assignee
宁波激智新材料科技有限公司
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Application filed by 宁波激智新材料科技有限公司 filed Critical 宁波激智新材料科技有限公司
Priority to US13/578,794 priority Critical patent/US9004709B2/en
Publication of WO2012027973A1 publication Critical patent/WO2012027973A1/zh

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Classifications

    • G02B1/105—
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements

Definitions

  • Anti-scratch optical diffusion film, liquid crystal display device and lighting device are Anti-scratch optical diffusion film, liquid crystal display device and lighting device
  • Optical diffusing films are widely used in liquid crystal display devices, advertising light boxes, lighting devices, mobile communication device buttons and the like that require a light source to provide uniform illumination.
  • liquid crystal display devices have been rapidly developed, and are widely used in mobile communication device display devices, notebook computers, desktop computers, and large-sized liquid crystal televisions.
  • optical diffusion films in lighting devices is increasing, which makes liquid crystals
  • the requirements for optical diffusing films for display devices and illuminating devices are also increasing.
  • research on optical diffusing films is mainly focused on improving brightness.
  • the optical diffusion film needs to have strong scratch resistance to ensure that the film is not scratched or scratched during use.
  • the optical diffusion film needs to be cut into the size required for the device during use, and most of the optical diffusion film is subjected to belt friction during cutting through the die-cutting factory; optical diffusion after cutting The film is also easily scratched by the hand of the operator during the packaging process; in addition, the optical diffusion film is also prone to friction between the film and the film during transportation after packaging, and various frictions cause damage to the appearance of the film, thereby causing the film to be The pass rate of the client is reduced.
  • the optical diffusing film in the illuminating device is located outside the bulb, and the film is also easily scratched or scratched during the cleaning and wiping, thereby affecting its use.
  • the strength of the resin binder used in the composition in the optical diffusion film diffusion coating is increased, that is, the resin reinforcing agent is used to improve the scratch resistance of the optical diffusion film.
  • “Environmental protection, scratch-resistant new prism film” uses a resin reinforcing agent to improve the scratch resistance of the film; the scratch-resistant film and liquid disclosed in CN 2004461A "Crystal display” patent application, bulletin number CN 100498460C "scratch resistant optical film and its use” Patent and bulletin number CN 100426008C “scratch resistant optical film and its use” Patent basically uses heating and UV double curing
  • the film and the uneven structure are used to enhance the scratch resistance of the film, and the essence thereof is also to improve the scratch resistance of the film by enhancing the strength of the resin.
  • the diffusion particles in the diffusion coating of the optical diffusion film may still be detached or scratched, thereby affecting the use of the optical diffusion film.
  • a single particle size or a narrow dispersion particle size diffusion particle is mostly used, so that when the film is subjected to an external force, such as being rubbed or scratched, the diffusion particle is easily scraped by a large area. Damage or shedding, resulting in a large area of the optical diffusion film being scratched.
  • the main object of the present invention is to provide an anti-scratch optical diffusion film, a liquid crystal display device and an illumination device using the same, which are advantageous for reducing the optical diffusion film caused by an external force.
  • the present invention provides an anti-scratch optical diffusion film comprising a substrate and a diffusion coating comprising a diffusion adhesive layer and diffusion.
  • the diffusion particle is scratched or peeled off by a large area to improve optical diffusion thinness.
  • Particle, the particle size variation coefficient of the diffusion particle is
  • the scratch-resistant optical diffusion film as described above wherein the diffusion particle has a particle diameter variation coefficient of 40%. Further, the scratch-resistant optical diffusion film as described above, wherein the diffusion particles protrude from the surface of the diffusion layer.
  • the scratch-resistant optical diffusion film as described above, wherein the diffusion particles are one of a silicon compound, a siloxane resin, polystyrene (PS), polymethyl methacrylate (PMMA) or a mixture of at least two of them.
  • the diffusion particles are one of a silicon compound, a siloxane resin, polystyrene (PS), polymethyl methacrylate (PMMA) or a mixture of at least two of them.
  • the scratch-resistant optical diffusion film as described above, wherein the substrate may be polyethylene terephthalate (PET), glass, polycarbonate (PC), polymethyl methacrylate (PMMA) or polystyrene (PS).
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • PS polystyrene
  • the present invention also provides a liquid crystal display device comprising a backlight module and a liquid crystal panel, the backlight module comprising at least one scratch-resistant optical diffusion film as described above.
  • the present invention also provides a lighting device comprising at least one scratch resistant optical diffusing film as described above.
  • the present invention uses particles having a particle size variation coefficient of 10% to 100% as diffusion particles of an optical diffusion film, such that when the film is subjected to an external force, such as being rubbed or scratched, because of diffusion particles
  • the particle size is relatively dispersed, so that only a small part of the particle size of the diffusion coating of the optical diffusion film is scratched or peeled off, and the ⁇ diffusion particles are not affected, thereby reducing the area where the optical diffusion film is scratched.
  • the diffusion film which uses particles of a single particle diameter or a narrow dispersion particle diameter as a diffusion particle in the prior art is scratched or peeled off by a large area when subjected to an external force, thereby improving the scratch resistance of the optical diffusion film.
  • Sex. DRAWINGS the diffusion film which uses particles of a single particle diameter or a narrow dispersion particle diameter as a diffusion particle in the prior art is scratched or peeled off by a large area when subjected to an external force, thereby improving the scratch resistance of the optical diffusion film.
  • FIG. 1 is a schematic cross-sectional view of a prior art optical diffusion film
  • FIG. 2 is a schematic cross-sectional view showing a prior art optical diffusion film after being scratched
  • FIG. 3 is a schematic cross-sectional view of an optical diffusion film of the present invention.
  • Figure 4 is a schematic cross-sectional view showing the optical diffusion film of the present invention after being scratched. Description of the reference numerals
  • the scratch-resistant optical diffusion film of the present invention comprises a substrate and a diffusion coating, the diffusion coating comprising a diffusion layer and a diffusion particle, the coefficient of variation of the particle size of the diffusion particle is 10%-100%, and the coefficient of variation of the particle size is preferred.
  • a preferred particle size coefficient of variation is 40% for 15% to 60%.
  • Xi, X 2 ... X n are the particle diameters of the diffusion particles, and n is the number of the diffusion particles.
  • the present invention uses particles having a particle diameter variation coefficient of 10% to 100% as the diffusion particles, the particle size distribution of the diffusion particles is wide, so that when the diffusion film is subjected to an external force, such as being rubbed or scratched, This causes a large area of the diffusion particles to be scratched or peeled off, which improves the scratch resistance of the optical diffusion film.
  • the scratch-resistant optical diffusion film of the present invention is mainly an optical diffusion film in which the diffusion particles protrude from the surface of the diffusion adhesive layer.
  • the diffusion particles of the present invention can also be used.
  • the diffusion particles having a coefficient of variation of 10% to 100% are applied to the optical diffusion film in which the diffusion particles are located in the diffusion layer.
  • the present invention also provides a liquid crystal display device using the above-mentioned scratch-resistant optical diffusion film, the liquid crystal display device comprising a backlight module and a liquid crystal panel, the backlight module comprising a liquid crystal panel, a light source, a light guide plate, an optical reflective film and an optical diffusion film.
  • One to three anti-scratch optical diffusion films of the present invention may be used depending on the practical application, and the light source may be at least one of a cold cathode fluorescent lamp, an external electrode fluorescent lamp, a light-emitting diode tube, and a hot cathode fluorescent lamp.
  • the scratch resistant optical diffusing film of the present invention is also applicable to a lighting device comprising at least one scratch resistant optical diffusing film of the present invention.
  • optical diffusion film of the present invention will be further described below with reference to the accompanying drawings.
  • FIG. 1 is a schematic cross-sectional view of a prior art optical diffusing film 1 including a substrate 11 and a diffusion coating 12, the diffusion coating 12 comprising diffusion particles 13 and a diffusion layer 14, wherein the diffusion particles 13 have the same particle size
  • the diffusion particles 13 protrude from the surface of the diffusion adhesive layer 14.
  • 2 shows a state in which the optical diffusing film 1 of the prior art is scratched after being subjected to an external force F.
  • the diffusion particles 13 are firstly The external force F is scratched by the action of the external force F. Since the particle size distribution of the diffusion particles 13 is uniform, the diffusion particles 13 are scratched by a large area, and the optical diffusion film 1 is scratched by a large area.
  • the optical diffusion film 2 of the present invention comprises a substrate 21 and a diffusion coating 22, and the diffusion coating 22 comprises a diffusion particle 23 and a diffusion adhesive layer 24, and the particle size variation coefficient of the diffusion particle 23 is 20%, diffusion.
  • the particles 23 protrude from the surface of the diffusion adhesive layer 24.
  • the optical diffusing film 2 of the present invention has a wide particle size distribution of the diffusing particles 23, and only a small portion of the diffusing particles 23 having a large particle diameter are scratched, and the diffusion of the particles The particles 23 are not affected, thereby effectively preventing the optical diffusion film 2 from being scratched by a large area.
  • the following is a specific embodiment of the scratch-resistant optical diffusion film of the present invention.
  • the above composition 1 was coated on a 38 micron PET substrate (Shandong Fuwei Film Co., Ltd.), and the substrate coating process was as follows:
  • the substrate was unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding) Machine) unwinding, then automatic feeding, after the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120° respectively.
  • C 100 °C, 90 °C
  • the length of the drying tunnel is 10-30m
  • the residence time of the film in the drying tunnel is about 1-lOmin
  • the winder (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder)
  • the optical diffusion film 1 of the present invention is obtained by winding.
  • siloxane resin particles having a particle diameter of 1 to 100 ⁇ m and a particle diameter CV of 15% (average particle diameter of 55 ⁇ m, standard deviation of 8.25 ⁇ m) were added to the vessel (available from the market) Then, add 40 parts by weight of polyester polyol (PC5000, Guangzhou Nippon Paint Co., Ltd.), and then gradually add 4 parts by weight of curing agent (PC2000, Guangzhou Nippon Paint Co., Ltd.), and then put the container in the stirring The mixture was stirred and mixed to obtain the diffusion coating composition 2 of the present invention.
  • polyester polyol PC5000, Guangzhou Nippon Paint Co., Ltd.
  • curing agent PC2000, Guangzhou Nippon Paint Co., Ltd.
  • the above composition 2 was coated on a 50 micron PET substrate (Shandong Fuwei Film Co., Ltd.), and the substrate coating process was as follows:
  • the substrate was unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding) Machine) unwinding, then automatic feeding, after the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120° respectively.
  • C 100 °C, 90 °C
  • the length of the drying tunnel is 10-30m
  • the residence time of the film in the drying tunnel is about 1-lOmin
  • the winder (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder)
  • the optical diffusing film 2 of the present invention is obtained by winding.
  • PS particles available from Horiba having a particle diameter of 1 to 100 ⁇ m, a particle diameter CV of 20% (average particle diameter of 35 ⁇ m, and a standard deviation of 7 ⁇ m) were added to the vessel, followed by Add 40 parts by weight of polyester polyol (PC5000, Guangzhou Nippon Paint Co., Ltd.), and then gradually add 4 weights A portion of the curing agent (PC2000, Guangzhou Nippon Paint Co., Ltd.) was placed, and the container was placed on a stirrer to be stirred and mixed to obtain the diffusion coating composition 3 of the present invention.
  • polyester polyol PC5000, Guangzhou Nippon Paint Co., Ltd.
  • the above composition 3 was coated on a 50 micron PET substrate (Shandong Fuwei Film Co., Ltd.), and the substrate coating process was as follows:
  • the substrate was unwinding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding) Machine) unwinding, then automatic feeding, after the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120° respectively.
  • C 100 °C, 90 °C
  • the length of the drying tunnel is 10-30m
  • the residence time of the film in the drying tunnel is about 1-lOmin
  • the winder Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder
  • the optical diffusion film 3 of the present invention is obtained by winding.
  • PMMA particles available from Horiba having a particle size of 1 to 100 ⁇ m and a particle diameter CV of 25% (average particle diameter of 40 ⁇ m, standard deviation of 10 ⁇ m) were added to the vessel, followed by Add 40 parts by weight of polyester polyol (PC5000, Guangzhou Nippon Paint Co., Ltd.), then gradually add 4 parts by weight of curing agent (PC2000, Guangzhou Nippon Paint Co., Ltd.), then place the container on the stirrer and stir Mixing, the diffusion coating composition 4 of the present invention is obtained.
  • polyester polyol PC5000, Guangzhou Nippon Paint Co., Ltd.
  • curing agent PC2000, Guangzhou Nippon Paint Co., Ltd.
  • the above composition 4 was coated on a 100 micron PET substrate (DuPont), and the substrate coating process was as follows: The substrate was unwinded by a unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film unwinding machine) Then, the material is automatically fed, and the composition is coated on the substrate and then baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C, 100 °, respectively. C, 90 °C, the length of the drying tunnel is 10-30m, the residence time of the film in the drying tunnel is about l-10min, and finally the winding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder) is wound up.
  • the optical diffusion film 4 of the present invention The optical diffusion film 4 of the present invention.
  • the above composition 5 was coated on a 100 micron PET substrate (DuPont), and the substrate coating process was as follows: The substrate was unwinded by a unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine) Then, the material is automatically fed, and the composition is coated on the substrate and then baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C, 100 °, respectively. C, 90 °C, the length of the drying tunnel is 10-30m, the residence time of the film in the drying tunnel is about 1-lOmin, and finally the winding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder) is wound up.
  • the optical diffusion film 5 of the present invention The optical diffusion film 5 of the present invention.
  • the above composition 6 was coated on a 125 micron PET substrate (DuPont), and the substrate coating process was as follows: The substrate was unwinded by a unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine) Then, the material is automatically fed, and the composition is coated on the substrate and then baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C, 100 °, respectively. C, 90 °C, the length of the drying tunnel is 10-30m, the residence time of the film in the drying tunnel is about 1-lOmin, and finally the winding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder) is wound up.
  • PMMA particles available from Horiba having a particle size of 1 to 100 ⁇ m and a particle diameter CV of 40% (average particle diameter of 45 ⁇ m, standard deviation of 18 ⁇ m) were added to the vessel, followed by Add 40 parts by weight of polyester polyol (PC5000, Guangzhou Nippon Paint Co., Ltd.), then gradually add 4 parts by weight of curing agent (PC2000, Guangzhou Nippon Paint Co., Ltd.), then place the container on the stirrer and stir Mixing, the diffusion coating composition 7 of the present invention is obtained.
  • polyester polyol PC5000, Guangzhou Nippon Paint Co., Ltd.
  • curing agent PC2000, Guangzhou Nippon Paint Co., Ltd.
  • the above composition 7 was coated on a 125 micron PET substrate (DuPont), and the substrate coating process was as follows: The substrate was unwound by a unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine) Then, the material is automatically fed, and the composition is coated on the substrate and then baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C, 100 °, respectively. C, 90 °C, the length of the drying tunnel is 10-30m, the residence time of the film in the drying tunnel is about 1-lOmin, and finally the winding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder) is wound up.
  • the optical diffusion film 7 of the present invention The optical diffusion film 7 of the present invention.
  • the above composition 8 was applied to a 188 micron PET substrate (Japan Toray Co., Ltd.), and the substrate coating process was as follows: The substrate was passed through a unwinding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine) The unwinding is carried out, and then the material is automatically fed. After the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C respectively.
  • a unwinding machine Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine
  • the unwinding is carried out, and then the material is automatically fed.
  • the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C respectively.
  • the optical diffusion film 8 of the present invention is obtained.
  • 36.5 parts by weight of particles having a particle diameter of 1 to 100 ⁇ m and a particle diameter CV of 50% (average particle diameter of 35 ⁇ m, standard deviation of 17.5 ⁇ m) were added to the container (containing 10 parts by weight of silica particles and 26.5 parts by weight of siloxane resin particles, available from Horiba, followed by 40 parts by weight of polyester polyol (PC5000, Guangzhou Nippon Paint Co., Ltd.), and then gradually adding 4 parts by weight of curing agent ( PC2000, Guangzhou Nippon Paint Co., Ltd.), and then the container was placed on a stirrer and stirred to obtain the diffusion coating composition 9 of the present invention.
  • PC5000 Polyol
  • curing agent PC2000, Guangzhou Nippon Paint Co., Ltd.
  • the above composition 9 was applied to a 188 micron PET substrate (Japan Toray Co., Ltd.), and the substrate coating process was as follows: The substrate was passed through a unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine) The unwinding is carried out, and then the material is automatically fed. After the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C respectively.
  • a unwinder Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine
  • the unwinding is carried out, and then the material is automatically fed.
  • the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C respectively.
  • the optical diffusion film 9 of the present invention is obtained.
  • the above composition 10 was applied to a 188 micron PET substrate (Japan Toray Co., Ltd.), and the substrate coating process was as follows: The substrate was passed through a unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine) The unwinding is carried out, and then the material is automatically loaded. After the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 °C.
  • the length of the drying tunnel is 10-30m
  • the residence time of the film in the drying tunnel is about 1-lOmin
  • the winder Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder
  • the above composition 11 was coated on a 50 micron PET substrate (Shandong Fuwei Film Co., Ltd.), and the substrate coating process was as follows:
  • the substrate was unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding) Machine) unwinding, then automatic feeding, after the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120° respectively.
  • C 100 °C, 90 °C
  • the length of the drying tunnel is 10-30m
  • the residence time of the film in the drying tunnel is about 1-lOmin
  • the winder (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder)
  • the optical diffusion film 11 of the present invention is obtained by winding.
  • 36.5 parts by weight of particles (containing 20 parts by weight of siloxane resin particles) having a particle diameter of 1 to 100 ⁇ m and a particle diameter CV of 70% (average particle diameter of 15 ⁇ m, standard deviation of 10.5 ⁇ m) were added to the vessel.
  • 16.5 parts by weight of PS particles available from the market, followed by 40 parts by weight of polyester polyol (PC5000, Guangzhou Libang Coating Co., Ltd.), and then gradually added 4 parts by weight of curing agent (PC2000, Guangzhou Libang Coating Co., Ltd.), and then the container was placed on a stirrer and stirred to obtain the diffusion coating composition 12 of the present invention.
  • the above composition 12 was coated on a 38 micron PET substrate (Shandong Fuwei Film Co., Ltd.), and the substrate coating process was as follows:
  • the substrate was unwinding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding) Machine) unwinding, then automatic feeding, after the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120° respectively.
  • C 100 °C, 90 °C
  • the length of the drying tunnel is 10-30m
  • the residence time of the film in the drying tunnel is about 1-lOmin
  • the winder (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder)
  • the optical diffusion film 12 of the present invention is obtained by winding.
  • PC5000 Polyol
  • a curing agent PC2000, Guangzhou Nippon Paint Co., Ltd.
  • the above composition 13 was coated on a 38 micron PET substrate (Shandong Fuwei Film Co., Ltd.), and the substrate coating process was as follows:
  • the substrate was unwinding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. Machine) unwinding, then automatic feeding, after the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120° respectively.
  • C 100 °C, 90 °C
  • the length of the drying tunnel is 10-30m
  • the residence time of the film in the drying tunnel is about 1-lOmin
  • the winder Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder
  • the optical diffusion film 13 of the present invention is obtained by winding.
  • 36.5 parts by weight of particles (containing 10 parts by weight of siloxane resin particles) having a particle diameter of 1 to 100 ⁇ m and a particle diameter CV of 90% (average particle diameter of 40 ⁇ m, standard deviation of 36 ⁇ m) were added to the vessel.
  • the above composition 14 was coated on a 100 micron PET substrate (DuPont), and the substrate coating process was as follows: The substrate was unwinded by a unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine) Then, the material is automatically fed, and the composition is coated on the substrate and then baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C, 100 °, respectively. C, 90 °C, the length of the drying tunnel is 10-30m, the residence time of the film in the drying tunnel is about 1-lOmin, and finally the winding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder) is wound up.
  • the optical diffusion film 14 of the present invention The optical diffusion film 14 of the present invention.
  • the above composition 15 was coated on a 100 micron PET substrate (DuPont), and the substrate coating process was as follows: The substrate was unwinded by a unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding machine) Then, the material is automatically fed, and the composition is coated on the substrate and then baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120 ° C, 100 °, respectively. C, 90 °C, the length of the drying tunnel is 10-30m, the residence time of the film in the drying tunnel is about 1-lOmin, and finally the winding machine (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder) is wound up.
  • the optical diffusion film 15 of the present invention The optical diffusion film 15 of the present invention.
  • An optical diffusion film 0 having a particle diameter CV of 5% (average particle diameter of 30 ⁇ m and standard deviation of 1.5 ⁇ m) was prepared in the same manner as in the optical diffusion film 1 - 15 for use with the optical diffusion film 1-15. For comparison.
  • the specific preparation process of the optical diffusion film 0 is as follows:
  • silica particles available from Horiba having a particle diameter of 1 to 10 ⁇ m and a particle diameter CV of 5% were added to the vessel, followed by 40 parts by weight of a polyester polyol (PC5000, Guangzhou Libang Coating Co., Ltd.), and then gradually added 4 parts by weight of curing agent (PC2000, Guangzhou Nippon Paint Co., Ltd.), and then the container was placed on a stirrer and stirred to obtain a diffusion coating composition 0.
  • a polyester polyol PC5000, Guangzhou Libang Coating Co., Ltd.
  • curing agent PC2000, Guangzhou Nippon Paint Co., Ltd.
  • the above composition 0 was coated on a 38 micron PET substrate (Shandong Fuwei Film Co., Ltd.), and the substrate coating process was as follows:
  • the substrate was unwinder (Guangdong Shicheng Plastic Machinery Co., Ltd. fully automatic film unwinding) Machine) unwinding, then automatic feeding, after the composition is coated on the substrate, it is baked through a three-stage baking box (common type baking box of Hangzhou Taoxing Printing Equipment Co., Ltd.), and the oven temperature is set to 120° respectively.
  • C 100 °C, 90 °C
  • the length of the drying tunnel is 10-30m
  • the residence time of the film in the drying tunnel is about 1-lOmin
  • the winder (Guangdong Shicheng Plastic Machinery Co., Ltd. automatic film winder) Winding, the optical diffusion film 0 was obtained.
  • Adhesion test In a clean room, the temperature is 25 ⁇ 5 °C, the humidity is 55% ⁇ 5%, using the paint film Grid (Kunshan Sannuo Instrument QFH paint film scribing instrument, the highest level of cross-cut is 0) test the adhesion of the above optical diffusing film 0-15.
  • Hardness test In a clean room, the temperature is 25 ⁇ 5°C, the humidity is 55% ⁇ 5%, and the hardness of the above optical diffusing film 0-15 is tested by a pencil hardness tester (Suzhou Kelleri QHQ-A portable pencil hardness tester). The greater the hardness of the film, the more difficult the film is to be scratched, and the stronger the scratch resistance of the film.
  • Table 1 shows the performance and test data of the optical diffusion film 0-15.
  • the hardness of the optical diffusion film 1-15 prepared by using the diffusion particles having a particle size variation coefficient of 10% to 100% is in the hardness of Above 3H
  • the hardness H of the optical diffusion film 0 prepared by using the diffusion particles having a particle diameter variation coefficient of 5% exhibits better scratch resistance of the optical diffusion film of the present invention, and at the same time, the optical diffusion film of the present invention
  • the adhesion is 0 grade and has good adhesion.
  • the present invention prepares an optical diffusion film by using diffusion particles having a particle diameter variation coefficient of 10% to 100%, which is advantageous for reducing the scratched area of the optical diffusion film, and avoiding the use of a single particle size in the prior art or
  • the diffusion film prepared by using the particles having a narrow dispersion particle diameter as a diffusion particle is scratched or peeled off by a large area when subjected to an external force, thereby improving the scratch resistance of the optical diffusion film.

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Description

抗刮伤光学扩散薄膜、 液晶显示装置及照明装置
光学扩散薄膜、 使用该抗 刮伤光学扩散薄膜的液晶显示装置及照明装置。 背景技术
光学扩散薄膜广泛应用于液晶显示装置、 广告灯箱、 照明装置、 移动通讯 设备按键等需要光源的装置上以提供均匀照明。
近年来液晶显示装置快速发展， 并在移动通讯设备显示装置、 笔记本型计 算机、 台式计算机以及大尺寸液晶电视中得到广泛应用； 另外， 光学扩散薄膜 在照明装置中的使用也日渐增加， 这使得液晶显示装置及照明装置对光学扩散 薄膜的要求也日趋提高， 目前对光学扩散薄膜的研究主要集中在提高亮度上。
然而光学扩散薄膜在使用过程中除需要具有高亮度外， 还需要具有较强的 抗刮伤性以保证薄膜在使用过程中不被刮伤或擦伤。 具体来说， 光学扩散薄膜 在使用过程中需要先裁切成装置所需要的尺寸大小， 而大多数光学扩散薄膜在 通过模切厂裁切的过程中会受到传送带摩擦； 裁切后的光学扩散薄膜在包装过 程中也容易被操作工的手刮擦； 此外光学扩散薄膜在包装后的运输过程中也容 易发生薄膜与薄膜之间的摩擦， 各种摩擦导致薄膜外观受到损坏， 从而使薄膜 在客户端的合格率降低。 另外照明装置中的光学扩散薄膜位于灯泡的外部， 在 清洁擦拭的过程中， 薄膜也容易被刮伤或擦伤， 从而影响其使用。
针对上述问题， 目前主要是通过增加光学扩散薄膜扩散涂层中组合物所使 用的树脂粘合剂的强度， 即使用树脂增强剂来提高光学扩散薄膜的抗刮伤性。 如公开号为 CN 101487902A的 "环保， 抗刮伤新型棱镜膜" 专利申请中使用了 树脂增强剂来提高薄膜的抗刮伤性； 公开号为 CN 2004461A的 "抗刮薄膜及液 晶显示器" 专利申请、 公告号为 CN 100498460C的 "抗刮光学膜及其用途" 专 利及公告号为 CN 100426008C的 "抗刮光学膜及其用途" 专利基本都釆用了加 热和紫外双固化的方式以及凹凸结构， 来加强薄膜的抗刮伤性， 其实质也是通 过增强树脂的强度来提高薄膜的抗刮伤性。
然而光学扩散薄膜的扩散涂层中还存在扩散粒子， 并且大多数扩散粒子是 露出扩散涂层的， 如果只是增强树脂自身的强度， 并不能保证树脂与颗粒之间 的粘结强度， 这样在薄膜的使用过程中， 仍会导致光学扩散薄膜扩散涂层中的 扩散粒子脱落或划伤， 从而影响光学扩散薄膜的使用。
现有技术中的光学扩散薄膜扩散涂层中大多使用单一粒径或者窄分散粒径 的扩散粒子， 使得薄膜在受到外力作用时， 如被摩擦或者刮擦时， 容易造成扩 散粒子被大面积刮伤或脱落， 从而导致光学扩散薄膜被大面积刮伤。
因此， 如何进一步提高光学扩散薄膜的抗刮伤性， 减少光学扩散薄膜在受 到外力作用时所引起的扩散粒子被大面积刮伤或脱落， 成为本领域亟待解决的 问题。 发明内容
有鉴于此， 本发明的主要目的在于提供一种抗刮伤光学扩散薄膜、 使用该 抗刮伤光学扩散薄膜的液晶显示装置及照明装置， 有利于减少光学扩散薄膜在 受到外力作用时所引起的扩散粒子被大面积刮伤或脱落， 从而提高光学扩散薄 为达到上述目的， 本发明提供一种抗刮伤光学扩散薄膜， 包括基材和扩散 涂层， 该扩散涂层包含扩散胶层和扩散粒子， 该扩散粒子的粒径变异系数为
10%- 100%。
进一步地， 如上所述的抗刮伤光学扩散薄膜， 其中， 所述扩散粒子的粒径 变异系数为 15%-60%。
进一步地， 如上所述的抗刮伤光学扩散薄膜， 其中， 所述扩散粒子的粒径 变异系数为 40%。 进一步地， 如上所述的抗刮伤光学扩散薄膜， 其中， 所述扩散粒子突出扩 散胶层表面。
进一步地， 如上所述的抗刮伤光学扩散薄膜， 其中， 所述扩散粒子为硅化 合物、 硅氧烷树脂、 聚苯乙烯 （PS )、 聚甲基丙烯酸甲酯 （PMMA ) 中的一种 或其中至少两种的混合物。
进一步地， 如上所述的抗刮伤光学扩散薄膜， 其中， 所述扩散粒子的粒径 为 1-100微米。
进一步地， 如上所述的抗刮伤光学扩散薄膜， 其中， 所述基材可为聚对苯 二甲酸乙二醇酯（PET )、 玻璃、 聚碳酸酯（PC )、 聚甲基丙烯酸甲酯（PMMA ) 或聚苯乙烯 （PS )。
本发明还提供一种液晶显示装置， 包括背光模组及液晶面板， 该背光模组 包含至少一个如上所述的抗刮伤光学扩散薄膜。
本发明还提供一种照明装置， 该照明装置包含至少一个如上所述的抗刮伤 光学扩散薄膜。
与现有技术相比， 本发明釆用粒径变异系数为 10%-100%的粒子作为光学 扩散薄膜的扩散粒子， 这样当薄膜受到外力作用时， 如被摩擦或者刮擦时， 因 为扩散粒子的粒径较分散， 使得光学扩散薄膜的扩散涂层中只有很小一部分粒 径的粒子被刮伤或脱落， 其佘扩散粒子则不受影响， 从而有利于减少光学扩散 薄膜被刮伤的面积， 避免现有技术中使用单一粒径或者窄分散粒径的粒子作为 扩散粒子的扩散薄膜在受到外力作用时所引起的扩散粒子被大面积刮伤或脱 落， 提高了光学扩散薄膜的抗刮伤性。 附图说明
图 1为现有技术的光学扩散薄膜的剖面示意图；
图 2为现有技术的光学扩散薄膜被刮伤后的剖面示意图；
图 3为本发明的光学扩散薄膜的剖面示意图；
图 4为本发明的光学扩散薄膜被刮伤后的剖面示意图。 附图标记说明
I、 2 光学扩散薄膜
II、 21 基材
12、 22 扩散涂层
13、 23 扩散粒子
14、 24 扩散胶层
F 外力 具体实施方式
本发明的抗刮伤光学扩散薄膜包括基材和扩散涂层， 该扩散涂层包含扩散 胶层和扩散粒子， 该扩散粒子粒径的变异系数为 10%-100%, 优选的粒径变异 系数为 15%-60%, 更优选的粒径变异系数为 40%。
本发明的扩散粒子的粒径变异系数（C.V 值）釆用公式 C.V=SD/Xx lOO% 计算， 其中 SD为扩散粒子粒径分布的标准差， X为扩散粒子的平均粒径， 根 据如下公式计算 SD、 X
SD = /(Xl - X)2 + (X2 - X)2... + (Xn - X)2 n
其中， Xi、 X2...Xn为扩散粒子的粒径， n为扩散粒子的数量。
由于本发明釆用了粒径变异系数为 10%-100%的粒子作为扩散粒子， 使得 扩散粒子的粒径分布较宽， 从而在扩散薄膜受到外力作用时， 如被摩擦或者刮 擦时， 不会造成扩散粒子大面积被刮伤或脱落， 提高了光学扩散薄膜的抗刮伤 性。
本发明的抗刮伤光学扩散薄膜主要为扩散粒子突出扩散胶层表面的光学扩 散薄膜， 对于扩散粒子位于扩散胶层内的光学扩散薄膜， 也可釆用本发明的扩 散粒子， 即可将粒径变异系数为 10%-100%的扩散粒子应用于扩散粒子位于扩 散胶层内的光学扩散薄膜中。 本发明还提供使用上述抗刮伤光学扩散薄膜的液晶显示装置， 该液晶显示 装置包括背光模组及液晶面板， 该背光模组包含液晶面板、 光源、 导光板、 光 学反射薄膜及光学扩散薄膜， 可根据实际应用， 使用 1-3个本发明的抗刮伤光 学扩散薄膜， 光源可为冷阴极荧光灯、 外部电极荧光灯、 发光极管和热阴极荧 光灯中的至少一种。
本发明的抗刮伤光学扩散薄膜也可应用于照明装置中， 该照明装置中包含 至少一个本发明的抗刮伤光学扩散薄膜。
下面结合附图对本发明的光学扩散薄膜作进一步说明。
图 1为现有技术的光学扩散薄膜的剖面示意图， 光学扩散薄膜 1包括基材 11和扩散涂层 12, 扩散涂层 12包含扩散粒子 13和扩散胶层 14, 其中扩散粒 子 13的粒径相同， 扩散粒子 13突出扩散胶层 14表面。 图 2示出了现有技术的 光学扩散薄膜 1在受到外力 F作用后被刮伤的情形， 如图 2所示， 现有技术的 光学扩散薄膜 1在受到外力 F作用后， 扩散粒子 13首先外力 F的作用而被刮 伤， 由于扩散粒子 13的粒径分布单一， 使扩散粒子 13被大面积刮伤， 从而造 成光学扩散薄膜 1被大面积刮伤。
参考图 3和图 4, 分别为本发明的光学扩散薄膜及其被刮伤后的剖面示意 图。 如图 3所示， 本发明的光学扩散薄膜 2包括基材 21和扩散涂层 22, 扩散 涂层 22包含扩散粒子 23和扩散胶层 24,扩散粒子 23的粒径变异系数为 20%, 扩散粒子 23突出扩散胶层 24表面。 如图 4所示， 本发明的光学扩散薄膜 2在 受到外力 F作用后， 由于扩散粒子 23的粒径分布较宽， 只有少部分粒径较大的 扩散粒子 23被刮伤， 其佘的扩散粒子 23则不受影响， 从而有效避免了光学扩 散薄膜 2被大面积刮伤。
以下为本发明的抗刮伤光学扩散薄膜的具体实施例。
一、 光学扩散薄膜的制备
实施例 1 : 光学扩散薄膜 1的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 10% (平均粒径为 60微米， 标准差为 6微米） 的 36.5重量份的二氧化硅粒子（可从巿场购得）， 接着加入 40重量份的聚酯多元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂（PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器 上搅拌混合， 得到本发明的扩散涂层组合物 1。
将上述组合物 1涂布于 38微米的 PET基材 (山东富维薄膜有限公司 )上， 基材涂布过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放 卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州 涛兴印刷设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100 °C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经 收卷机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的 光学扩散薄膜 1。
实施例 2: 光学扩散薄膜 2的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 15% (平均粒径为 55微米， 标准差为 8.25微米 ) 的 36.5重量份的硅氧烷树脂粒子 (可从巿场购得 ), 接着 加入 40重量份的聚酯多元醇（PC5000, 广州立邦涂料有限公司）， 然后再逐步 加入 4重量份的固化剂 （PC2000, 广州立邦涂料有限公司）， 然后将容器放在 搅拌器上搅拌混合， 得到本发明的扩散涂层组合物 2。
将上述组合物 2涂布于 50微米的 PET基材 (山东富维薄膜有限公司 )上， 基材涂布过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放 卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州 涛兴印刷设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100 °C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经 收卷机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的 光学扩散薄膜 2。
实施例 3: 光学扩散薄膜 3的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 20% (平均粒径为 35微米， 标准差为 7微米） 的 36.5重量份的 PS粒子 (可从巿场购得）， 接着加入 40重 量份的聚酯多元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重 量份的固化剂 （PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器上 搅拌混合， 得到本发明的扩散涂层组合物 3。
将上述组合物 3涂布于 50微米的 PET基材 (山东富维薄膜有限公司 )上， 基材涂布过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放 卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州 涛兴印刷设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100 °C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经 收卷机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的 光学扩散薄膜 3。
实施例 4: 光学扩散薄膜 4的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 25% (平均粒径为 40微米， 标准差为 10微米 ) 的 36.5重量份的 PMMA粒子 (可从巿场购得）， 接着加入 40重量份的聚酯多元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂（PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器 上搅拌混合， 得到本发明的扩散涂层组合物 4。
将上述组合物 4涂布于 100微米的 PET基材（杜邦公司 )上， 基材涂布过 程如下： 基材经放卷机（广东仕诚塑料机械有限公司全自动薄膜放卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州涛兴印刷设备 有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100°C、 90 °C , 烘 道长度为 10-30m, 薄膜在烘道中的停留时间约 l-10min, 最后经收卷机 （广东 仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的光学扩散薄膜 4。
实施例 5: 光学扩散薄膜 5的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 30% (平均粒径为 10微米， 标准差为 3微米） 的 36.5重量份的二氧化硅粒子 (可从巿场购得）， 接着加入 40重量份的聚酯多元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂（PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器 上搅拌混合， 得到本发明的扩散涂层组合物 5。
将上述组合物 5涂布于 100微米的 PET基材（杜邦公司 )上， 基材涂布过 程如下： 基材经放卷机（广东仕诚塑料机械有限公司全自动薄膜放卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州涛兴印刷设备 有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100°C、 90 °C , 烘 道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经收卷机 （广东 仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的光学扩散薄膜 5。
实施例 6: 光学扩散薄膜 6的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 35% (平均粒径为 25微米， 标准差为 8.75微米） 的 36.5重量份的 PMMA粒子 （韩国先进化学株式会社）， 接着加入 40重量份的聚酯多元醇（PC5000, 广州立邦涂料有限公司）， 然后再 逐步加入 4重量份的固化剂 （PC2000, 广州立邦涂料有限公司）， 然后将容器 放在搅拌器上搅拌混合， 得到本发明的扩散涂层组合物 6。
将上述组合物 6涂布于 125微米的 PET基材（杜邦公司）上， 基材涂布过 程如下： 基材经放卷机（广东仕诚塑料机械有限公司全自动薄膜放卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州涛兴印刷设备 有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100°C、 90 °C , 烘 道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经收卷机 （广东 仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的光学扩散薄膜
6。
实施例 7: 光学扩散薄膜 7的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 40% (平均粒径为 45微米， 标准差为 18微米 ) 的 36.5重量份的 PMMA粒子 (可从巿场购得）， 接着加入 40重量份的聚酯多元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂（PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器 上搅拌混合， 得到本发明的扩散涂层组合物 7。 将上述组合物 7涂布于 125微米的 PET基材（杜邦公司）上， 基材涂布过 程如下： 基材经放卷机（广东仕诚塑料机械有限公司全自动薄膜放卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州涛兴印刷设备 有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100°C、 90 °C , 烘 道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经收卷机 （广东 仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的光学扩散薄膜 7。
实施例 8: 光学扩散薄膜 8的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 45% (平均粒径为 40微米， 标准差为 18微米 ) 的 36.5重量份的二氧化硅粒子 (可从巿场购得 ), 接着加入 40重量份的聚酯多元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂（PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器 上搅拌混合， 得到本发明的扩散涂层组合物 8。
将上述组合物 8涂布于 188微米的 PET基材 (日本东丽株式会社）上， 基 材涂布过程如下： 基材经放卷机（广东仕诚塑料机械有限公司全自动薄膜放卷 机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州涛 兴印刷设备有限公司的普通型烘板箱）烘烤，烘箱温度分别设为 120°C、 100°C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经收卷 机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的光学 扩散薄膜 8。
实施例 9: 光学扩散薄膜 9的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 50% (平均粒径为 35微米， 标准差为 17.5微米） 的 36.5重量份的粒子（包含 10重量份的二氧化硅粒子及 26.5重量份的硅氧烷树脂粒子， 可从巿场购得）， 接着加入 40重量份的聚酯多 元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂 ( PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器上搅拌混合， 得 到本发明的扩散涂层组合物 9。 将上述组合物 9涂布于 188微米的 PET基材（日本东丽株式会社）上， 基 材涂布过程如下： 基材经放卷机（广东仕诚塑料机械有限公司全自动薄膜放卷 机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州涛 兴印刷设备有限公司的普通型烘板箱）烘烤，烘箱温度分别设为 120°C、 100°C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经收卷 机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的光学 扩散薄膜 9。
实施例 10: 光学扩散薄膜 10的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 55% (平均粒径为 50微米， 标准差为 27.5微米） 的 36.5重量份的粒子（包含 12重量份的硅氧烷树脂粒子 及 24.5重量份的 PMMA粒子， 可从巿场购得）， 接着加入 40重量份的聚酯多 元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂 ( PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器上搅拌混合， 得 到本发明的扩散涂层组合物 10。
将上述组合物 10涂布于 188微米的 PET基材 (日本东丽株式会社 )上， 基材涂布过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放 卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州 涛兴印刷设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100 °C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经 收卷机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的 光学扩散薄膜 10。
实施例 11 : 光学扩散薄膜 11的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 60% (平均粒径为 18微米， 标准差为 10.8微米） 的 36.5重量份的粒子（包含 15重量份的二氧化硅粒子及 21.5 重量份的 PS 粒子， 可从巿场购得）， 接着加入 40 重量份的聚酯多元醇 ( PC5000 , 广州立邦涂料有限公司）， 然后再逐步加入 4 重量份的固化剂 ( PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器上搅拌混合， 得 到本发明的扩散涂层组合物 11。
将上述组合物 11涂布于 50微米的 PET基材（山东富维薄膜有限公司）上， 基材涂布过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放 卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州 涛兴印刷设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100 °C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经 收卷机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的 光学扩散薄膜 11。
实施例 12: 光学扩散薄膜 12的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 70% (平均粒径为 15微米， 标准差为 10.5微米） 的 36.5重量份的粒子（包含 20重量份的硅氧烷树脂粒子 及 16.5重量份的 PS粒子， 可从巿场购得）， 接着加入 40重量份的聚酯多元醇 ( PC5000 , 广州立邦涂料有限公司）， 然后再逐步加入 4 重量份的固化剂 ( PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器上搅拌混合， 得 到本发明的扩散涂层组合物 12。
将上述组合物 12涂布于 38微米的 PET基材（山东富维薄膜有限公司）上， 基材涂布过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放 卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州 涛兴印刷设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100 °C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经 收卷机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的 光学扩散薄膜 12。
实施例 13: 光学扩散薄膜 13的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 80% (平均粒径为 20微米， 标准差为 16微米） 的 36.5重量份的粒子（包含 10重量份的二氧化硅粒子、 10 重量份的硅氧烷树脂粒子及 16.5重量份的 PS粒子， 可从巿场购得）， 接着加入 40重量份的聚酯多元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂（PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器 上搅拌混合， 得到本发明的扩散涂层组合物 13。
将上述组合物 13涂布于 38微米的 PET基材（山东富维薄膜有限公司）上， 基材涂布过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放 卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州 涛兴印刷设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100 °C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经 收卷机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的 光学扩散薄膜 13。
实施例 14: 光学扩散薄膜 14的制备
在容器中加入粒径为 1-100微米，粒径 C.V值为 90% (平均粒径为 40微米， 标准差为 36微米） 的 36.5重量份的粒子（包含 10重量份的硅氧烷树脂粒子、 15重量份的 PS粒子及 11.5重量份的 PMMA粒子， 可从巿场购得）， 接着加入 40重量份的聚酯多元醇 （PC5000, 广州立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂（PC2000, 广州立邦涂料有限公司）， 然后将容器放在搅拌器 上搅拌混合， 得到本发明的扩散涂层组合物 14。
将上述组合物 14涂布于 100微米的 PET基材 (杜邦公司 )上， 基材涂布 过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放卷机）放 卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州涛兴印刷 设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100°C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经收卷机 （广 东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的光学扩散薄 膜 14。
实施例 15: 光学扩散薄膜 15的制备
在容器中加入粒径为 1-100微米， 粒径 C.V值为 100% (平均粒径为 30微 米， 标准差为 30微米） 的 36.5重量份的二氧化硅粒子（可从巿场购得）， 接着 加入 40重量份的聚酯多元醇（PC5000, 广州立邦涂料有限公司）， 然后再逐步 加入 4重量份的固化剂 （PC2000, 广州立邦涂料有限公司）， 然后将容器放在 搅拌器上搅拌混合， 得到本发明的扩散涂层组合物 15。
将上述组合物 15涂布于 100微米的 PET基材（杜邦公司 )上， 基材涂布 过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放卷机）放 卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州涛兴印刷 设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100°C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经收卷机 （广 东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到本发明的光学扩散薄 膜 15。
二、 比较例
釆用与光学扩散薄膜 1 - 15相同的方法制备粒径 C.V值为 5% (平均粒径为 30微米， 标准差为 1.5微米） 的光学扩散薄膜 0, 以用于与光学扩散薄膜 1-15 作对比。 光学扩散薄膜 0的具体制备过程如下：
在容器中加入粒径为 1-100微米， 粒径 C.V值为 5%的 36.5重量份的二氧 化硅粒子（可从巿场购得）， 接着加入 40重量份的聚酯多元醇（PC5000, 广州 立邦涂料有限公司）， 然后再逐步加入 4重量份的固化剂 （PC2000, 广州立邦 涂料有限公司）， 然后将容器放在搅拌器上搅拌混合， 得到扩散涂层组合物 0。
将上述组合物 0涂布于 38微米的 PET基材 (山东富维薄膜有限公司 )上， 基材涂布过程如下： 基材经放卷机 （广东仕诚塑料机械有限公司全自动薄膜放 卷机）放卷， 然后自动上料， 组合物在基材上涂布之后经过三段烘板箱 （杭州 涛兴印刷设备有限公司的普通型烘板箱）烘烤， 烘箱温度分别设为 120°C、 100 °C、 90 °C , 烘道长度为 10-30m, 薄膜在烘道中的停留时间约 1-lOmin, 最后经 收卷机 （广东仕诚塑料机械有限公司全自动薄膜收卷机） 收卷， 得到光学扩散 薄膜 0。
二、 光学扩散薄膜的测试
测试一
附着力测试： 在无尘车间内， 温度 25 ± 5 °C , 湿度 55% ± 5%, 利用漆膜划 格仪（昆山三诺仪器 QFH漆膜划格仪， 划格等级最高级为 0级）测试上述光学 扩散薄膜 0-15的附着力。
测试二
硬度测试： 在无尘车间内， 温度 25±5°C, 湿度 55% ±5%, 利用铅笔法硬 度计 (苏州柯乐瑞 QHQ - A便携式铅笔法硬度计 )测试上述光学扩散薄膜 0-15 的硬度， 薄膜硬度越大， 说明薄膜越不易被刮伤， 薄膜的抗刮伤性越强。
表 1: 光学扩散薄膜 0-15的性能及测试数据
Figure imgf000016_0001
表 1为光学扩散薄膜 0-15的性能及测试数据， 从表 1看出， 本发明釆用粒 径变异系数为 10%-100%的扩散粒子制备的光学扩散薄膜 1-15 的硬度均在 3H 以上,大于釆用粒径变异系数为 5%的扩散粒子制备的光学扩散薄膜 0的硬度 H, 显示了本发明光学扩散薄膜较好的抗刮伤性， 同时， 本发明的光学扩散薄膜的 附着力均为 0级， 具有良好的附着性。
由以上技术方案可知， 本发明釆用粒径变异系数为 10%-100%的扩散粒子 制备光学扩散薄膜， 有利于减少光学扩散薄膜被刮伤的面积， 避免现有技术中 使用单一粒径或者窄分散粒径的粒子作为扩散粒子制备的扩散薄膜在受到外力 作用时所引起的扩散粒子被大面积刮伤或脱落， 提高了光学扩散薄膜的抗刮伤 性。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保护范 围。 凡是根据本发明内容所做的均等变化与修饰， 均涵盖在本发明的专利范围 内。

Claims

权 利 要 求 书
1、 一种抗刮伤光学扩散薄膜， 包括基材和扩散涂层， 该扩散涂层包含扩散 胶层和扩散粒子， 其特征在于， 该扩散粒子的粒径变异系数为 10%-100%。
2、 如权利要求 1所述的抗刮伤光学扩散薄膜， 其特征在于， 所述扩散粒子 的粒径变异系数为 15%-60%。
3、 如权利要求 2所述的抗刮伤光学扩散薄膜， 其特征在于， 所述扩散粒子 的粒径变异系数为 40%。
4、 如权利要求 1所述的抗刮伤光学扩散薄膜， 其特征在于， 所述扩散粒子 突出扩散胶层表面。
5、 如权利要求 1所述的抗刮伤光学扩散薄膜， 其特征在于， 所述扩散粒子 为硅化合物、 硅氧烷树脂、 聚苯乙烯、 聚甲基丙烯酸甲酯中的一种或其中至少 两种的混合物。
6、 如权利要求 1中所述的抗刮伤光学扩散薄膜， 其特征在于， 所述扩散粒 子的粒径为 1-100微米。
7、 如权利要求 1中所述的抗刮伤光学扩散薄膜， 其特征在于， 所述基材可 为聚对苯二甲酸乙二醇酯、 玻璃、 聚碳酸酯、 聚甲基丙烯酸甲酯或聚苯乙烯。
8、 一种液晶显示装置， 包括背光模组及液晶面板， 其特征在于， 该背光模 组包含至少一个权利要求 1-7中任一项所述的抗刮伤光学扩散薄膜。
9、 一种照明装置， 其特征在于， 该照明装置包含至少一个权利要求 1-7中 任一项所述的抗刮伤光学扩散薄膜。
PCT/CN2011/070276 2010-08-31 2011-01-14 抗刮伤光学扩散薄膜、液晶显示装置及照明装置 WO2012027973A1 (zh)

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