WO2015182448A1 - Reflective film and edge-lit backlight unit using same - Google Patents
Reflective film and edge-lit backlight unit using same Download PDFInfo
- Publication number
- WO2015182448A1 WO2015182448A1 PCT/JP2015/064424 JP2015064424W WO2015182448A1 WO 2015182448 A1 WO2015182448 A1 WO 2015182448A1 JP 2015064424 W JP2015064424 W JP 2015064424W WO 2015182448 A1 WO2015182448 A1 WO 2015182448A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- particles
- layer
- mass
- reflective film
- resin layer
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- 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
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
Definitions
- the present invention relates to a reflective film used for a backlight of a liquid crystal display device or the like, and more particularly to a reflective film suitable for an edge light type backlight unit.
- the liquid crystal display device generally employs a backlight system that emits light by illuminating a liquid crystal layer from the back side.
- a backlight system that emits light by illuminating a liquid crystal layer from the back side.
- an edge light type and a direct type are known.
- a resin layer containing particles (also referred to as a bead layer, a particle-containing layer, or a coating layer) is laminated on at least one surface of a white film, and a convex portion made of particles on the surface ( A reflection film in which protrusions are formed is known.
- Patent Document 1 a resin layer that defines particle coverage, the number of particles stacked, the height of protrusions, the number of protruding particles, and the like has been proposed (for example, Patent Document 1). ⁇ 4).
- polyolefin particles typified by polyethylene particles and polypropylene particles have properties of relatively low hardness and relatively little deterioration (discoloration, etc.) due to heat, taking advantage of these properties. Began developing a reflective film.
- polyethylene particles have relatively good slipperiness.
- polyethylene particles generally known from the past are included in the resin layer to form protrusions (projections) on the surface of the reflective film, the slipperiness due to contact with the light guide plate is not sufficiently exhibited.
- the polyethylene particles (shaving powder) scraped by contact with the light guide plate adheres (transfers) to the light guide plate and contaminates the light guide plate.
- an object of the present invention is to stick to a member (for example, a light guide plate) that is in contact with a reflective film, taking advantage of the characteristics of polyolefin particles (the characteristics of relatively low hardness and relatively little deterioration (discoloration) against heat).
- the contact member for example, the light guide plate
- the contact member can be prevented from being damaged (scratch scratches and shaving powder transfer contamination) and the contact member (for example, the light guide plate) can be prevented from being contaminated by heat, and the heat resistance is good.
- An object of the present invention is to provide a reflective film (small color change due to heat) and an edge light type backlight unit using the same.
- the present invention has the following configuration.
- a reflective film comprising a resin layer containing polyolefin particles having a viscosity average molecular weight of 500,000 or more on at least one surface of a substrate film.
- the polyolefin particles are polyethylene particles and / or polypropylene particles.
- the reflective film according to [1] or [2], wherein the polyolefin particles have an average particle diameter (r: ⁇ m) of 5 to 100 ⁇ m.
- the base film is a white film in which a film layer (A layer) for supporting the B layer is laminated on both surfaces of a film layer (B layer) containing bubbles inside.
- damage to the contact member for example, the light guide plate
- scratch scratch It is possible to provide a reflective film that can suppress contamination of the shaving powder) and contamination of the contact member (for example, the light guide plate) due to heat and has good heat resistance (small discoloration due to heat).
- the member (contact member) that comes into contact with the reflective film is not particularly limited, and the contact member is appropriately selected depending on the application and intended use of the reflective film.
- the reflective film of the present invention is particularly suitable for an edge-light type backlight unit, and the unit is disposed in contact with the reflective film and the light guide plate.
- the light guide plate will be described as an example of the contact member. To do.
- White spot unevenness (a phenomenon in which a spot that is brightly visible in a dotted shape occurs) may occur due to sticking between the reflective film and the light guide plate, but sticking to the light guide plate by using the reflective film of the present invention. Sticking is suppressed, and as a result, the occurrence of uneven white spots is suppressed.
- a light guide plate may be damaged when a reflective film and a light guide plate contact, damage to a light guide plate is suppressed by using a reflective film of the present invention.
- the damage to the light guide plate means, for example, that the light guide plate is scratched or that particles in the resin layer of the reflective film are scraped and the shaving powder is transferred to the light guide plate to contaminate the light guide plate. .
- the backlight unit of the liquid crystal display device may become hot when the liquid crystal display device is turned on.
- conventional polyethylene particles are used as particles to be included in the resin layer, the polyethylene particles melt and contaminate the light guide plate.
- the reflective film of the present invention such contamination of the light guide plate by heat is suppressed.
- the reflective film of the present invention has good heat resistance (discoloration due to heat) by using polyolefin particles having a viscosity average molecular weight of 500,000 or more.
- FIG. 1 is a view showing an image of a surface photograph taken by a scanning electron microscope on the surface of a resin layer showing an example of a reflective film according to the present invention.
- FIG. 2 is a schematic cross-sectional view showing an example of a resin layer according to the present invention.
- FIG. 3 is a schematic cross-sectional view showing an example of a resin layer according to the present invention.
- the reflective film of the present invention has a resin layer containing polyolefin particles having a viscosity average molecular weight of 500,000 or more on at least one surface of a base film.
- the reflective film of the present invention preferably has a convex portion formed of the polyolefin particles on the surface of the resin layer.
- the convex portions as described above on the surface of the resin layer because sticking between the reflective film and the light guide plate is suppressed, and as a result, occurrence of white spot unevenness is suppressed. Then, it is preferable to form the convex portion with polyolefin particles having a viscosity average molecular weight of 500,000 or more because damage to the light guide plate (scratch scratches and transfer contamination of shaving powder) and contamination of the light guide plate due to heat are suppressed. In addition, it is preferable to use polyolefin particles having a viscosity average molecular weight of 500,000 or more because heat resistance (discoloration due to heat) is improved.
- FIG. 1 shows an image of a surface photograph taken by a scanning electron microscope on the surface of a resin layer as an example of a reflective film according to the present invention. It can be clearly confirmed that there are convex portions due to particles on the surface of the resin layer.
- reference numeral 1 denotes a resin film
- reference numeral 2 denotes particles (polyolefin particles having a viscosity average molecular weight of 500,000 or more).
- the convex portions formed by particles on the surface of the resin layer may be formed such that only a part of the particles protrudes from the surface (FIG. 2A), or more than half of the particles may protrude from the surface. (FIG. 2 (B)).
- the convex portion may be formed of individual particles as shown in FIGS. 2A and 2B, or the convex portion may be formed in a state where a plurality of particles are aggregated or aggregated. Good (FIG. 2C).
- grains may be arrange
- the convex part may be formed in the state (FIG. 3B).
- a part or all of the convex region is covered with a resin (binder) contained in the resin layer. This is preferable because dropout of particles is effectively suppressed.
- polyolefin particles having a viscosity average molecular weight of 500,000 or more are not particularly limited, but specific examples thereof include, for example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, Examples thereof include particles composed of ⁇ -olefins such as octene, 1-decene, 1-dodecene, 4-methyl-1-pentene, 3-methyl-1-pentene, and homopolymers or copolymers of cyclic olefins.
- a homopolymer of ethylene or propylene which is an olefin having a small number of carbon atoms
- a copolymer mainly composed of ethylene or propylene are preferable.
- These particles ethylene or propylene homopolymers and copolymers based on ethylene or propylene
- are compared to other polyolefin particles polyolefin particles based on olefins having a relatively large number of carbon atoms. Since hardness is comparatively small, since damage to a light-guide plate can be suppressed effectively, it is preferable.
- the resin layer may contain both polyethylene particles and polypropylene particles.
- Examples of the copolymer component of the above copolymer containing ethylene as a main component include ⁇ -olefins such as propylene, 1-butene, 1-hexene, 1-octene and 4-methyl-1-pentene, and cyclic olefins. Is mentioned.
- Examples of the copolymer component of the copolymer having propylene as a main component include, for example, ⁇ -olefins such as ethylene, 1-butene, 1-hexene, 1-octene and 4-methyl-1-pentene, and cyclic compounds. Examples include olefins.
- the content ratio of ethylene or propylene in these copolymers is preferably 50% by mass or more, more preferably 70% by mass or more, and particularly preferably 90% by mass or more.
- the upper limit is about 99% by mass.
- polyethylene particles made of an ethylene homopolymer and a copolymer containing ethylene as a main component are preferred, and polyethylene particles made of an ethylene homopolymer are particularly preferred.
- the polyethylene particles have relatively good mixing with the resin layer, and as a result, the coating property of the resin layer is relatively good. There is an advantage.
- polyolefin particles having a viscosity average molecular weight of 500,000 or more may be simply referred to as “polyolefin particles”.
- polyolefin particles means “polyolefin particles having a viscosity average molecular weight of 500,000 or more”.
- the polyolefin particles in the present invention have a viscosity average molecular weight of 500,000 or more. That is, the polyolefin particles in the present invention are ultra-high molecular weight polyolefin particles compared to conventionally known low molecular weight polyolefin particles (viscosity average molecular weight is 100,000 or less).
- the viscosity average molecular weight of the polyolefin particles is preferably 800,000 or more, more preferably 1,000,000 or more, and particularly preferably 1,500,000 or more, from the viewpoint of sufficiently suppressing contamination of the light guide plate by heat. preferable.
- the upper limit of the viscosity average molecular weight is not particularly limited, but is preferably 20 million or less, more preferably 10 million or less, particularly preferably 7 million or less, and most preferably 5 million or less.
- Polyethylene particles having a viscosity average molecular weight of 500,000 or more made of an ethylene homopolymer can be synthesized by referring to, for example, JP 2012-25817 A, International Publication No. 2009/011231 Pamphlet, and the like.
- polyethylene particles having a viscosity average molecular weight of 500,000 or more made of a copolymer containing ethylene as a main component (a copolymer with another ⁇ -olefin) can be obtained by referring to, for example, JP-A-2007-23171. Can be synthesized.
- polypropylene particles having a viscosity average molecular weight of 500,000 or more made of a propylene homopolymer are disclosed in, for example, JP-A-6-234812, JP-A-7-292202, JP-A-2005-298726, etc. Can be synthesized.
- polyethylene particles having a viscosity average molecular weight of 500,000 or more are generally commercially available and can be obtained.
- “Miperon (registered trademark)” series (trade name, manufactured by Mitsui Chemicals), “Hi-Zex Million (registered trademark)” series (trade name, manufactured by Mitsui Chemicals), “Sunfine (registered trademark)” series (product) Name, manufactured by Asahi Kasei Chemicals), "Dyneema (registered trademark)” series (trade name, manufactured by DSM), "Spectra (registered trademark)” series (trade name, manufactured by Honeywell), “GUR (registered trademark)” series (Trade name, manufactured by Chicona), “Hostalen® (registered trademark) ®” series (trade name, Hoechst), and the like.
- the polyolefin particles in the present invention are preferably contained so that convex portions of the polyolefin particles are formed on the surface of the resin layer.
- the average particle diameter (r: ⁇ m) of the polyolefin particles is preferably 5 ⁇ m or more, more preferably 10 ⁇ m or more, and particularly preferably 15 ⁇ m or more.
- the upper limit of the average particle diameter of the polyolefin particles is preferably 100 ⁇ m or less, more preferably 75 ⁇ m or less, from the viewpoint of suppressing dropping of the polyolefin particles and ensuring uniform coatability when the resin layer is formed by coating.
- the thickness is preferably 50 ⁇ m or less.
- the film is prevented from falling off and the coating property is ensured and uniform coating properties are ensured. Sticking with the light plate can be effectively suppressed. Moreover, since the convex part formed with polyolefin particle
- the average particle diameter (r: ⁇ m) is a square or rectangle having the smallest area that completely surrounds one particle on a photograph.
- the length (major axis diameter) is defined as the maximum length of the particles, and is a value obtained by averaging the maximum lengths of the number of particles described in the examples.
- the shape of the polyolefin particles in the present invention is preferably spherical.
- spherical does not necessarily mean only a true sphere, but means that the cross-sectional shape of the particle is surrounded by a curved surface such as a circle, an ellipse, a substantially circle, or a substantially ellipse.
- the ratio of major axis to minor axis means 1.4 or less.
- the resin layer in the present invention preferably contains polyolefin particles and a resin (binder).
- the resin is not particularly limited, but a resin mainly composed of organic components is preferable.
- polyester resins polyurethane resins, acrylic resins or methacrylic resins are preferably used in terms of heat resistance, additive dispersibility, productivity, and glossiness.
- ultraviolet absorbing component contained in these resins include benzotriazole and benzophenone, and examples of the light stabilizing component contained in the resin include hindered amine (HALS).
- HALS hindered amine
- a resin containing an ultraviolet absorbing component and a light stabilizing component is preferable.
- a resin obtained by copolymerizing a polymerizable monomer containing an ultraviolet absorbing component in the molecule and an acrylic monomer a resin obtained by copolymerizing a polymerizable monomer containing a light stabilizing component in the molecule and an acrylic monomer, or Examples thereof include a resin obtained by copolymerizing a polymerizable monomer containing an ultraviolet absorbing component in the molecule, a polymerizable monomer containing a light stabilizing component in the molecule, and an acrylic monomer.
- Examples of the polymerizable monomer containing an ultraviolet absorbing component in the molecule include 2- (2′-hydroxy-5′-methacryloxyethylphenyl) -2H-benzotriazole (trade name “Otsuka Chemical Co., Ltd.”). RUVA-93 ").
- Examples of the polymerizable monomer containing a light stabilizing component in the molecule include, for example, 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine (trade name “ADK STAB (registered trademark)” manufactured by ADEKA Corporation). LA-82 ").
- the content of polyolefin particles in the resin layer is 3 mass% or more is preferable with respect to 100 mass% of solid content, 5 mass% or more is more preferable, 7 mass% or more is further more preferable, and 10 mass% or more is especially preferable.
- the upper limit content is preferably 75% by mass or less, more preferably 60% by mass or less, from the viewpoint of suppressing the dropping of the polyolefin particles and from the viewpoint of ensuring uniform coatability during the formation of the resin layer. 55 mass% or less is particularly preferable. That is, the content of polyolefin particles in the resin layer is preferably 3 to 75% by mass with respect to 100% by mass of the total solid content of the resin layer.
- the content of the resin (binder) in the resin layer is determined from the viewpoint of fixing the polyolefin particles and suppressing dropping off, and from the viewpoint of ensuring uniform coatability when the resin layer is applied and formed. 20 mass% or more is preferable with respect to the total amount of 100 mass%, 25 mass% or more is more preferable, and 30 mass% or more is especially preferable.
- the upper limit of the resin content is preferably 90% by mass or less, and 85% by mass with respect to 100% by mass of the total solid content of the resin layer, from the viewpoint of forming a moderately large convex portion on the resin layer surface in an appropriate amount. The following is more preferable, and 80% by mass or less is particularly preferable.
- the resin layer preferably further contains a crosslinking agent. That is, the resin layer is formed from a composition containing the above-described resin (binder) and a crosslinking agent, thereby forming a crosslinked structure in the resin layer and improving the hardness of the resin layer. It is preferable because the effect of suppressing dropout can be improved.
- an isocyanate-based, melamine-based, or epoxy-based crosslinking agent is preferable, and an isocyanate-based crosslinking agent is preferable from the viewpoint that a crosslinking reaction can be rapidly performed even at a relatively low temperature.
- the content of the crosslinking agent in the resin layer is preferably in the range of 0.3 to 20% by mass, more preferably in the range of 0.5 to 15% by mass, with respect to 100% by mass of the total solid content of the resin layer.
- a mass% range is particularly preferred.
- the reflective film of the present invention may be charged during processing (the reflective film is punched out, molded and incorporated into the backlight), etc., and there may be a problem that charged dust or dust existing in the surroundings adheres. is there.
- the resin layer contains an antistatic agent within a range that does not impair the effects of the present invention.
- antistatic agents examples include organic antistatic agents such as cationic resins and anionic resins, conductive inorganic compounds (for example, tin oxide, antimony-doped tin oxide (ATO), indium oxide, tin-doped indium oxide, etc.) ).
- organic antistatic agents such as cationic resins and anionic resins
- conductive inorganic compounds for example, tin oxide, antimony-doped tin oxide (ATO), indium oxide, tin-doped indium oxide, etc.
- additives can be further added to the resin layer in the present invention as long as the effects of the present invention are not impaired.
- the additive include a fluorescent brightening agent, a heat stabilizer, an oxidation stabilizer, an organic lubricant, a coupling agent, a dye, and a pigment.
- the thickness (d) of the resin layer is not particularly limited, but is preferably in the range of 0.3 to 20 ⁇ m, more preferably in the range of 0.5 to 15 ⁇ m, and particularly preferably in the range of 1 to 10 ⁇ m.
- the thickness of the resin layer means the thickness of a portion where no convex portion due to particles exists on the resin layer. That is, it is the thickness of the portion where there is no protrusion due to particles.
- the thickness of the resin layer is less than 0.3 ⁇ m, the polyolefin particles may fall off. On the other hand, if the thickness of the resin layer exceeds 20 ⁇ m, the convex portions due to the polyolefin particles may not be sufficiently formed.
- the average particle diameter of polyolefin particles contained in the resin layer is preferably 1.5 or more, more preferably 2.0 or more, and particularly preferably 3.0 or more.
- the upper limit of the ratio (r / d) is preferably 30 or less, more preferably 25 or less, and particularly preferably 20 or less, from the viewpoint of suppressing the dropping of the polyolefin particles.
- the thickness of the resin layer can be determined, for example, as follows. First, the reflective film of the present invention is cut in a direction perpendicular to the film plane at a knife inclination angle of 3 ° using a rotary microtome manufactured by Nippon Microtome Research Co., Ltd. The obtained film cross section was observed using a scanning electron microscope (S-3400N manufactured by Hitachi, Ltd.), and the resin layer surface was a resin, not the part where particles were seen on the resin layer surface. The thickness of five portions is measured, and the average value is taken as the thickness of the resin layer.
- the present invention includes a mode in which, as shown in FIGS. 3 (A) and 3 (B), the particles are arranged in a plane on the surface of the resin layer with almost no gaps to form convex portions.
- the thickness of the resin layer means that five distances from the substrate surface to the particle surface are measured, and the average value is referred to as the thickness of the resin layer.
- one of the convex regions formed by the particles Part or all can be covered with a resin contained in the resin layer.
- the resin layer can contain particles other than the polyolefin particles (hereinafter referred to as “other particles”).
- other particles are contained in the resin layer
- the average particle diameter of the other particles is preferably smaller than the average particle diameter of the polyolefin particles. It is preferable for the resin layer to contain other particles having a relatively small average particle diameter, since the scratch resistance of the resin layer (characteristic that makes it difficult for scratches to enter) is improved.
- the average particle diameter of the other particles is preferably 0.8 times or less, more preferably 0.7 times or less, and particularly preferably 0.6 times or less that of the polyolefin particles.
- the lower limit is preferably 0.05 times or more, and more preferably 0.1 times or more.
- the average particle diameter of the other particles is preferably in the range of 1 to 20 ⁇ m, more preferably in the range of 2 to 15 ⁇ m.
- the content of other particles in the resin layer is preferably in the range of 10 to 200 parts by weight, more preferably in the range of 20 to 150 parts by weight, and particularly preferably in the range of 30 to 130 parts by weight with respect to 100 parts by weight of the polyolefin particles. .
- Examples of other particles include organic resin particles such as acrylic resin particles, silicone resin particles, nylon resin particles, styrene resin particles, benzoguanamine resin particles, urethane resin particles, and polyester resin particles.
- Organic particles or inorganic particles such as silica, aluminum hydroxide, aluminum oxide, zinc oxide, barium sulfide, magnesium silicate and the like can be mentioned.
- nylon resin particles are preferable. Since the nylon resin particles have a relatively low hardness, they are preferable from the viewpoint of suppressing damage to the light guide plate.
- the resin layer is provided on at least one surface of the base film.
- the resin layer may be provided only on one side of the base film, or may be provided on both sides of the base film.
- the lamination of the resin layer can be performed by, for example, applying and drying a coating composition (coating liquid) containing at least a resin, polyolefin particles, and an organic solvent on a base film.
- a coating composition coating liquid containing at least a resin, polyolefin particles, and an organic solvent on a base film.
- any coating method can be used for coating the coating composition of the resin layer on the base film.
- coating methods such as gravure coating, roll coating, spin coating, reverse coating, bar coating, screen coating, blade coating, air knife coating, and dipping can be used.
- the coating composition of the resin layer may be applied at the time of manufacturing the base film (in-line coating), or may be applied on the base film after completion of crystal orientation (off-line coating).
- Base film It does not specifically limit as a base film, Silver, the vapor deposition film of aluminum, the laminate film of silver foil or aluminum foil, a white film, a multilayer laminated film, etc. are mentioned.
- the base film When the base film is used as a reflective film, the higher the visible light reflectance, the better. For this reason, a white film containing bubbles and / or incompatible particles therein is preferably used.
- the white film is, for example, a film that is made white by adding a white colorant and / or air bubbles to a film made of a thermoplastic resin or the like.
- the white film preferably has a high visible light reflectance (for example, the reflectance of visible light (wavelength 550 nm) is preferably 95% or more). From this viewpoint, a white film having at least air bubbles inside is preferably used. It is done.
- a high visible light reflectance for example, the reflectance of visible light (wavelength 550 nm) is preferably 95% or more. From this viewpoint, a white film having at least air bubbles inside is preferably used. It is done.
- the white film having air bubbles inside is not particularly limited, and examples thereof include a porous unstretched or biaxially stretched polypropylene film and a porous unstretched or stretched polyethylene terephthalate film.
- a porous unstretched or biaxially stretched polypropylene film and a porous unstretched or stretched polyethylene terephthalate film.
- porous white biaxially stretched polyethylene terephthalate film disclosed in JP-A-2002-90515 or the porous white biaxially stretched polyethylene terephthalate film mixed and / or copolymerized with polyethylene naphthalate is preferably used.
- a film layer (A layer) for supporting (holding) the B layer is laminated on at least one surface of the above-described film layer (B layer) containing bubbles.
- the A layer may be laminated only on one side of the B layer, or may be laminated on both sides of the B layer. That is, a two-layer configuration of A layer / B layer and a three-layer configuration of A1 layer / B layer / A2 layer can be mentioned.
- a three-layer configuration of A1 layer / B layer / A2 layer is preferable.
- the A1 layer and the A2 layer are A layers, and the A1 layer and the A2 layer may have the same configuration (composition and thickness are the same), or may be different configurations (at least one of the composition and thickness is different). There may be.
- the A1 layer and the A2 layer may be configured with the same composition or may be configured with different compositions, but from the viewpoint of the productivity of the white film, It is preferable that A2 layer is comprised by the completely same composition.
- the A1 layer and the A2 layer may be collectively referred to as “A layer”, and the expression “A layer” includes the two-layer A layer, the three-layer A1 layer, and the A2 layer. Is included.
- the content of various materials contained in the A layer refers to the content per layer.
- the A layer has a function of supporting (holding) the B layer.
- the A layer is preferably a resin-based layer.
- the A layer is a layer mainly composed of a resin means that the resin is contained in an amount of 50% by mass or more with respect to 100% by mass of the total solid content of the A layer.
- the A layer preferably contains 60% by mass or more of resin, more preferably 70% by mass or more, and particularly preferably 80% by mass or more. The upper limit is about 99% by mass.
- the layer A preferably contains particles.
- an appropriate slip property can be imparted to the reflective film.
- handling properties and workability such as punching for forming a transmission portion (opening portion) are improved.
- a polyester resin is preferable.
- a polyester resin polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) is preferable.
- various known additives such as an antioxidant and an antistatic agent may be added to the polyester resin.
- the content of the polyester resin constituting the A layer is preferably 50 parts by mass or more, more preferably 60 parts by mass or more, and particularly preferably 70 parts by mass or more with respect to 100 parts by mass of the total resin constituting the A layer.
- the upper limit is about 99 parts by mass.
- Examples of the particles contained in the A layer include organic particles and inorganic particles.
- Examples of the organic particles include polyester resins, polyamide resins such as benzoguanamine, polyurethane resins, acrylic resins, methacrylic resins, polyamide resins, polyethylene resins, polypropylene resins, polyvinyl chloride resins, polyvinylidene chloride resins, polystyrene resins, polyacetic acids.
- examples thereof include particles made of a resin such as a vinyl resin, a fluorine resin, and a silicone resin, and particles made of a copolymer or a mixture of two or more of the above resins.
- Inorganic particles include calcium carbonate, magnesium carbonate, zinc carbonate, titanium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, zinc sulfide, calcium phosphate, silica, alumina, mica, titanium mica, talc, clay, kaolin, fluoride. And lithium fluoride and calcium fluoride.
- inorganic particles are preferable, and among the inorganic particles, calcium carbonate, titanium oxide, barium sulfate, and silica are preferably used.
- the average particle size of the particles contained in the layer A is preferably in the range of 0.05 to 10 ⁇ m, more preferably in the range of 0.1 to 5 ⁇ m, and still more preferably in the range of 0.2 to 3 ⁇ m.
- the content of particles in the A layer is preferably 0.005% by mass or more, and more preferably 0.01% by mass or more with respect to 100% by mass of the total solid content of the A layer.
- the upper limit content is preferably 20% by mass or less, more preferably 10% by mass or less, and particularly preferably 5% by mass or less with respect to 100% by mass of the total solid content of the A layer.
- the content of the particles is less than 0.005% by mass, good sliding properties may not be obtained.
- the content of the particles exceeds 20% by mass, the film forming property may be deteriorated.
- the B layer is preferably a layer that is whitened by containing fine bubbles inside the film layer.
- the layer B is preferably a porous unstretched or biaxially stretched polypropylene film or a porous unstretched or stretched polyethylene terephthalate film.
- the method for producing the film layer (B layer) containing bubbles in the inside is disclosed in, for example, JP-A-8-262208, JP-A-2002-90515, JP-A-2002-138150, etc. It is disclosed in detail and can be used in the present invention.
- the B layer is preferably made of a polypropylene resin or a polyester resin, and particularly preferably made of a polyester resin.
- a polyester resin As the polyester resin constituting the B layer, polyethylene terephthalate (PET) or polyethylene naphthalate (PEN) is preferable.
- various known additives such as an antioxidant and an antistatic agent may be added to the polyester resin.
- the content of the polyester resin constituting the B layer is preferably 50% by mass or more, more preferably 60% by mass or more, and particularly preferably 70% by mass or more with respect to 100% by mass of the solid content of the B layer. The upper limit is about 95% by mass.
- Formation of air bubbles in the B layer can be achieved, for example, by finely dispersing a resin incompatible with the polyester resin in a polyester film that is a film substrate and stretching (for example, biaxial stretching).
- the B layer is preferably mixed with a polyester resin constituting the B layer in an incompatible resin (hereinafter sometimes referred to as an incompatible resin).
- an incompatible resin hereinafter sometimes referred to as an incompatible resin.
- the inclusion of the incompatible resin is preferable because a cavity having the incompatible resin as a nucleus is formed at the time of stretching, and light reflection occurs at the cavity interface.
- the resin incompatible with the polyester resin may be a homopolymer or a copolymer.
- Polyolefin resin such as polyethylene, polypropylene, polybutene, polymethylpentene, cyclic polyolefin resin, polystyrene resin, polyacrylate Resins, polycarbonate resins, polyacrylonitrile resins, polyphenylene sulfide resins, fluororesins, and the like are preferably used. Two or more of these may be used in combination.
- polyolefin resin examples include polyolefin resins such as polyethylene, polypropylene, polybutene, and polymethylpentene, cyclic polyolefin resins, and copolymers thereof.
- the preferable content of the incompatible resin to be contained in the B layer is 5% by mass or more and 25% by mass or less with respect to 100% by mass of the solid content of the B layer.
- the incompatible resin contained in the B layer is dispersed in a matrix made of a polyester resin with a number average particle diameter of 0.4 ⁇ m or more and 3.0 ⁇ m or less. It is preferable in obtaining.
- the number average particle size of the incompatible resin is preferably in the range of 0.5 ⁇ m to 1.5 ⁇ m.
- the number average particle diameter here is a cross section of the film in the width direction (TD), and the B layer portion of the cross section is a scanning electron microscope (FE-SEM) model S-2100A manufactured by Hitachi, Ltd. The average value of the diameters when the area of 100 particles observed in this way is obtained and converted to a perfect circle.
- the layer B further contains particles such as organic particles and inorganic particles.
- particles include the same particles as those that can be contained in the A layer.
- inorganic particles such as calcium carbonate, barium sulfate, and titanium dioxide that absorb less in the visible light range of wavelength 400 to 700 nm are preferable from the viewpoints of reflection characteristics, concealability, production cost, and the like.
- barium sulfate and titanium dioxide are most preferable from the viewpoints of film winding property, long-term film-forming stability, and improvement in reflection characteristics.
- the average particle diameter of the particles is preferably in the range of 0.1 to 3 ⁇ m. Use of such inorganic particles is preferable because the reflectivity and concealability are improved.
- the content of the inorganic particles in the B layer is preferably 0.1% by mass or more, based on the total solid content of the B layer of 100% by mass, and 0.5% by mass from the viewpoint of ensuring good reflection characteristics and concealment.
- the above is more preferable, and particularly 1% by mass or more is preferable.
- the upper limit content of the inorganic particles is preferably 10% by mass or less, and 5% by mass. The following is more preferable, and 3% by mass or less is particularly preferable.
- the B layer preferably further contains a copolyester.
- a copolyester By containing the copolyester in the B layer, it is possible to stably form a film even when the B layer contains a relatively high concentration of inorganic particles.
- the copolyester also has a role as a dispersant for the incompatible resin in the B layer.
- Examples of such a copolyester include a copolymer of polyethylene terephthalate and isophthalic acid, a copolymer of polyethylene terephthalate and cyclohexanedimethanol, a copolymer of polybutylene terephthalate and polytetramethylene terephthalate, and the like. In this invention, it is preferable to contain at least 2 types chosen from the group which consists of these copolyesters.
- the thickness of the base film is preferably 30 ⁇ m or more, more preferably 50 ⁇ m or more, and particularly preferably 100 ⁇ m or more from the viewpoint of ensuring high reflectance.
- the upper limit of the thickness is preferably 1,000 ⁇ m or less, more preferably 400 ⁇ m or less, and particularly preferably 300 ⁇ m or less from the viewpoint of reducing the thickness of the backlight unit.
- a commercially available base film can be used.
- “Lumirror (registered trademark)” E20 manufactured by Toray Industries, Inc.
- SY90, SY95 (manufactured by SKC), and the like can be mentioned.
- Optilon registered trademark
- MPET registered trademark
- the reflective film of the present invention is suitable for a backlight unit of a liquid crystal display device.
- the backlight method an edge light type and a direct type are generally employed, but the reflective film of the present invention is applied to both methods.
- the reflective film of the present invention is suitable for an edge light type backlight system.
- the edge-light type backlight system is a system in which light from a light source disposed at a side end portion of a light guide plate is propagated through the light guide plate to illuminate a liquid crystal layer (screen). Is disposed on the opposite side of the liquid crystal layer. At this time, the reflective film of the present invention is disposed so that the surface on which the resin layer is laminated faces the light guide plate.
- the edge light type backlight system has a problem of damaging the light guide plate due to contact between the light guide plate and the reflective film, and white spot unevenness due to adhesion between the light guide plate and the reflective film.
- these problems are alleviated by using the reflective film of the present invention.
- Viscosity average molecular weight (1-1) Viscosity average molecular weight of polyolefin particles Viscosity average molecular weight (Mv) is measured according to JIS K7367 (1999). When the intrinsic viscosity is [ ⁇ ], the viscosity average molecular weight (Mv) is represented by the following formula. Mv a ⁇ [ ⁇ ] b (Here, a and b are coefficients and are determined by the composition of the solvent and polymer).
- polyethylene particles including ethylene homopolymer and ethylene-based copolymer
- polypropylene particles including propylene homopolymer and propylene-based copolymer
- Viscosity average molecular weight of polyethylene particles (including ethylene homopolymer and ethylene-based copolymer) According to JIS K7367-3 (1999), intrinsic viscosity [ ⁇ ] and viscosity average molecular weight (Mv ) was measured. 20 mL of decalin (containing 1 g / L of dibutylhydroxytoluene (BHT)) was charged with 20 mg of polyethylene particles and stirred at 150 ° C. for 2 hours to dissolve the polyethylene particles. The solution was measured at a constant temperature of 135 ° C. using a Canon-Fenske viscometer (model number: SO) to measure the drop time (ts) between the marked lines.
- BHT dibutylhydroxytoluene
- Viscosity average molecular weight of polypropylene particles (including a propylene homopolymer and a copolymer containing propylene as a main component)
- the intrinsic viscosity [ ⁇ ] was determined in the same manner as in (1-2) above,
- the maximum length of a particle is a square or rectangle having the smallest area that completely surrounds one particle (that is, a square or rectangle in which the particle is in contact with the four sides of the square or rectangle).
- the length of the side, and in the case of a rectangle, the length of the long side (major axis diameter) was taken as the maximum length of the particle (that is, the longest constant tangent diameter was taken as the maximum length of the particle).
- Heat resistance evaluation 2 contamination of light guide plate by heat
- a 17-inch liquid crystal television manufactured by Panasonic Corporation, “VIERA (registered trademark)” TH-L17F1
- VIERA registered trademark
- TH-L17F1 an edge light type backlight
- the size of the light emitting surface of the backlight A was 37.5 cm ⁇ 21.2 cm, and the diagonal length was 43.1 cm.
- three optical films, a light guide plate (acrylic plate, 3.5 mm thickness, height of the convex portion formed on the light guide plate 12 ⁇ m) and a reflection film are taken out from the backlight A, and the reflection of the examples and comparative examples of the present invention.
- the film was cut into the same shape and size as the reflective film on which the film was mounted. Instead of the mounted reflective film, the reflective film was cut so that the surface of the resin layer of the reflective film faced the light guide plate side, and the light guide plate and the three optical films were installed in the same order and direction as before disassembly.
- the backlight A thus disassembled and assembled is heated for 1 hour in an atmosphere of 80 ° C., then left at room temperature for 1 hour, the liquid crystal television is disassembled again, and the surface of the light guide plate on which the reflective film is in contact
- the contamination state was visually evaluated. S: There is no contamination. A: Slight contamination is observed, but at an acceptable level. B: Contaminated.
- Class B 200 gf / cm 2 of but scratches is observed under load, under a load of 100 gf / cm 2, not seen wounds under a load of 50 gf / cm 2.
- Class C 200gf / cm 2, but scratches observed under a load of 100 gf / cm 2, not seen wounds under a load of 50 gf / cm 2.
- Class D Scratches are observed under a load of 50 gf / cm 2 .
- the cut reflective film was placed so that the resin layer surface of the reflective film faces the light guide plate side, and the light guide plate and the three optical films were placed in the same direction and direction as before the disassembly.
- the liquid crystal television was turned on, and white spot unevenness was visually observed. S: A white spot is not observed. A: A white point is slightly observed, but it is an acceptable level. B: A white spot is clearly observed.
- particles to be included in the resin layer Various particles as shown below were prepared. The shape of the particles is spherical except for the low molecular weight polyethylene particles 2 (indefinite shape) described later.
- ⁇ Polyethylene particles (a); ethylene homopolymer> "Miperon (registered trademark)” XM-220, Mitsui Chemicals Co., Ltd., viscosity average molecular weight 2 million ⁇ polyethylene particles (b); ethylene homopolymer> “Miperon (registered trademark)” XM-221U, Mitsui Chemicals, Inc., viscosity average molecular weight 2 million ⁇ polyethylene particles (c); homopolymer of ethylene> “Miperon (registered trademark)” PM-200 manufactured by Mitsui Chemicals, Inc., viscosity average molecular weight 1.8 million ⁇ polyethylene particles (d); homopolymer of ethylene> “Miperon (registered trademark)” XM-330, Mitsui Chemicals Co., Ltd., viscosity average molecular weight 2 million ⁇ polyethylene particles (e); ethylene homopolymer> Hoechst's “Hostalen®
- polyethylene particles (i) having a viscosity average molecular weight of 600,000 are adjusted by adjusting the charged amount of the solid transition metal catalyst component, the total pressure during ethylene supply, and the ethylene supply time.
- polyethylene particles (j) having a viscosity average molecular weight of 1,200,000 are adjusted by adjusting the charged amount of the solid transition metal catalyst component, the total pressure during ethylene supply, and the ethylene supply time.
- Polyethylene particles (k); homopolymer of ethylene In the synthesis of the above polyethylene particles (h), polyethylene particles (k) having a viscosity average molecular weight of 6 million are adjusted by adjusting the charged amount of the solid transition metal catalyst component, the total pressure during ethylene supply, and the ethylene supply time. Got.
- the solid transition metal catalyst component prepared by the above operation was stored as a decant slurry.
- the yield of the total polymer obtained was 65.3 g, and the composition of the polymer calculated from the relationship between the cumulative amount of ethylene supplied to the reaction system and the yield of the total polymer was polyethylene by mass ratio: 93% by mass, Poly-4-methyl-1-pentene; 7% by mass.
- the viscosity average molecular weight of the obtained copolymer was 3 million.
- a first stage reactor equipped with a stirrer with a capacity of 600 liters was charged with 110 kg of liquefied propylene monomer, 5 liters of the prepolymer slurry obtained in (1) above, 0.14 moles of triethylaluminum, 0.14 moles of dicyclopentyldimethoxysilane and 5Nliters of hydrogen. Then, polymerization was performed at a temperature of 70 ° C. for 1 hour to obtain polypropylene particles. The viscosity average molecular weight of the polypropylene particles was 1.6 million.
- Example 1 The following resin layer coating solution was applied to one side of a white film (“Lumirror (registered trademark)” E6SQ manufactured by Toray Industries, Inc.) using a bar coater so that the resin layer thickness was about 3 ⁇ m. The resin layer was laminated by drying at 0 ° C. to produce a reflective film.
- a white film (“Lumirror (registered trademark)” E6SQ manufactured by Toray Industries, Inc.)
- the resin layer was laminated by drying at 0 ° C. to produce a reflective film.
- ⁇ Resin layer coating solution 70 parts by mass of benzotriazole-containing acrylic copolymer resin (“HALS HYBRID (registered trademark)” UV-G720T concentration 40% by mass solution manufactured by Nippon Shokubai Co., Ltd.), polyethylene particles a (“Miperon (Mitsui Chemical Co., Ltd.)” (Registered trademark) “XM-220, viscosity average molecular weight 2 million) 12 parts by mass, isocyanate-based crosslinking agent (Nippon Polyurethane Industry Co., Ltd.“ Coronate (registered trademark) ”HL, concentration 75% by mass) 2.7 parts by mass, acetic acid A coating solution was prepared by adding 55 parts by mass of ethyl with stirring.
- HALS HYBRID registered trademark
- polyethylene particles a (“Miperon (Mitsui Chemical Co., Ltd.)” (Registered trademark
- the solid concentration of this coating solution is 30% by mass. Further, the content ratio of the particles with respect to 100% by mass of the total solid content contained in the coating solution is 28.6% by mass, and the content ratio of the resin is 66.7% by mass.
- Examples 2 to 13 and Comparative Examples 1 to 4 A reflective film was produced in the same manner as in Example 1 except that the polyethylene particles in the resin layer coating solution of Example 1 were changed to the particles shown in Table 1. Examples 4 and 6 were applied so that the resin layer thickness was about 6 ⁇ m.
- Example 14 A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
- Benzotriazole-containing acrylic copolymer resin (“Hals Hybrid (registered trademark)” manufactured by Nippon Shokubai Co., Ltd.), 50 parts by mass, polyethylene particles a (Mitrone (Mitsui Chemicals) (Registered trademark) “XM-220, viscosity average molecular weight 2 million) 20 parts by mass, isocyanate-based crosslinking agent (Nippon Polyurethane Industry Co., Ltd.“ Coronate (registered trademark) ”HL, concentration 75% by mass) 2.7 parts by mass, acetic acid 67 parts by mass of ethyl was added with stirring to prepare a coating solution.
- the solid concentration of this coating solution is 30% by mass. Further, the content ratio of the particles with respect to 100% by mass of the total solid content contained in the coating solution is 47.6% by mass, and the content ratio of the resin is 47.6% by mass.
- Example 15 A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
- the solid concentration of this coating solution is 30% by mass. Further, the content ratio of the particles with respect to 100% by mass of the total solid content contained in the coating liquid is 14.3% by mass, and the content ratio of the resin is 81.0% by mass.
- Example 16 A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
- ⁇ Resin layer coating solution> Benzotriazole-containing acrylic copolymer resin (manufactured by Nippon Shokubai Co., Ltd. “HALS HYBRID (registered trademark)” UV-G720T concentration 40% by mass solution) 16 parts by mass, polyethylene particles a (Mitrone (Mitsui Chemicals) (Registered trademark) "XM-220, viscosity average molecular weight 2 million) 33.6 parts by mass, isocyanate-based crosslinking agent (Nippon Polyurethane Industry Co., Ltd.” Coronate (registered trademark) HL, concentration 75% by mass) 2.7 parts by mass " Then, 87 parts by mass of ethyl acetate was added with stirring to prepare a coating solution.
- HALS HYBRID registered trademark
- UV-G720T concentration 40% by mass solution 16 parts by mass
- polyethylene particles a Mitsubishi Chemicals
- XM-220 viscosity average molecular weight 2 million
- the solid concentration of this coating solution is 30% by mass. Further, the content ratio of the particles with respect to 100% by mass of the total solid content contained in the coating solution is 80.0% by mass, and the content ratio of the resin is 15.2% by mass.
- Example 17 A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
- a benzotriazole-containing acrylic copolymer resin manufactured by Nippon Shokubai Co., Ltd. “Hals Hybrid (registered trademark)” UV-G720T concentration 40% by mass solution
- polyethylene particles a (“
- the solid concentration of this coating solution is 30% by mass. Moreover, the content ratio of the particles with respect to 100% by mass of the total solid content contained in the coating solution is 75.0% by mass, and the content ratio of the resin is 20.2% by mass.
- Example 18 A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
- HALS HYBRID registered trademark
- the solid concentration of this coating solution is 30% by mass. Further, the content ratio of the particles with respect to 100% by mass of the total solid content contained in the coating solution is 3.0% by mass, and the content ratio of the resin is 92.2% by mass.
- Example 19 A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
- ⁇ Resin layer coating solution 94.8 parts by mass of a benzotriazole-containing acrylic copolymer resin (“Hals Hybrid (registered trademark)” UV-G720T concentration 40 mass% solution manufactured by Nippon Shokubai Co., Ltd.), polyethylene particles a (“Mitsui Chemical Co., Ltd.” 1.
- MIPELON (registered trademark) ”) XM-220, 2.1 parts by mass of viscosity average molecular weight 2 million), isocyanate-based crosslinking agent (Nippon Polyurethane Industry Co., Ltd.“ Coronate (registered trademark) ”HL, concentration 75% by mass) 7 parts by mass and 40 parts by mass of ethyl acetate were added with stirring to prepare a coating solution.
- the solid concentration of this coating solution is 30% by mass. Further, the content ratio of the particles with respect to 100% by mass of the total solid content contained in the coating solution is 5.0% by mass, and the content ratio of the resin is 90.3% by mass.
- Example 20 A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
- Benzotriazole-containing acrylic copolymer resin manufactured by Nippon Shokubai "Hals Hybrid (registered trademark)” UV-G720T concentration 40 mass% solution
- polyethylene particles a ("Mitsui Chemical Co., Ltd.” MIPERON (registered trademark) “XM-220, viscosity average molecular weight 2 million) 3.4 parts by mass
- nylon particles SP10 of Toray Industries, Inc.
- isocyanate-based crosslinking agent Nippon Polyurethane Industry Co., Ltd.“ 2.7 parts by mass of Coronate (registered trademark) “HL, concentration 75% by mass) and 45 parts by mass of ethyl acetate were added with stirring to prepare a coating solution.
- the solid concentration of this coating solution is 30% by mass.
- the content ratio of the polyethylene particles a with respect to 100% by mass of the total solid content contained in the coating solution is 8.1% by mass
- the content ratio of the nylon particles is 5.0% by mass
- the content ratio of the resin is 82.2% by mass. It is.
- All of the examples of the present invention had good heat resistance-1 (no heat discoloration) and heat resistance-2 (no heat guide light plate contamination), light guide plate damage and white spots The occurrence of unevenness is suppressed. Moreover, all of the examples of the present invention have good slipping property and coating property.
- Comparative Example 1 and Comparative Example 2 using low molecular weight (viscosity average molecular weight of 100,000 or less) polyethylene particles are inferior in heat resistance-2 (there is no contamination of the light guide plate due to heat). Moreover, since Comparative Example 1 and 2 are inferior in slipperiness, particle
- Comparative Example 3 using the crosslinked acrylic particles the light guide plate is poorly damaged.
- Comparative Example 4 using the crosslinked acrylic particles the light guide plate is inferior in damage, and since the particles having a relatively small average particle diameter are used, white spot unevenness is observed.
- the reflective film according to the present invention can be used for a backlight of a liquid crystal display device or the like, and is particularly suitable for use in an edge light type backlight unit.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
- Laminated Bodies (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
Description
[1]基材フィルムの少なくとも一方の面に、粘度平均分子量が50万以上であるポリオレフィン粒子を含有する樹脂層を有することを特徴とする反射フィルム。
[2]前記ポリオレフィン粒子がポリエチレン粒子および/またはポリプロピレン粒子である、[1]に記載の反射フィルム。
[3]前記ポリオレフィン粒子の平均粒子径(r:μm)が5~100μmである、[1]または[2]に記載の反射フィルム。
[4]前記樹脂層における前記ポリオレフィン粒子の含有量が、樹脂層の固形分総量100質量%に対して3~75質量%である、[1]~[3]のいずれかに記載の反射フィルム。
[5]前記ポリオレフィン粒子の平均粒子径(r:μm)と前記樹脂層の厚み(d:μm)との比率(r/d)が1.5以上である、[1]~[4]のいずれかに記載の反射フィルム。
[6]前記基材フィルムが、少なくとも内部に気泡を有する白色フィルムである、[1]~[5]のいずれかに記載の反射フィルム。
[7]前記基材フィルムが、内部に気泡を含有するフィルム層(B層)の両面に前記B層を支持するためのフィルム層(A層)が積層された白色フィルムである、[1]~[6]のいずれかに記載の反射フィルム。
[8][1]~[7]のいずれかに記載の反射フィルムが、その樹脂層が積層された面を導光板と向き合うように配置されてなる、エッジライト型バックライトユニット。 In order to achieve the above object, the present invention has the following configuration.
[1] A reflective film comprising a resin layer containing polyolefin particles having a viscosity average molecular weight of 500,000 or more on at least one surface of a substrate film.
[2] The reflective film according to [1], wherein the polyolefin particles are polyethylene particles and / or polypropylene particles.
[3] The reflective film according to [1] or [2], wherein the polyolefin particles have an average particle diameter (r: μm) of 5 to 100 μm.
[4] The reflective film according to any one of [1] to [3], wherein the content of the polyolefin particles in the resin layer is 3 to 75% by mass with respect to 100% by mass of the total solid content of the resin layer. .
[5] The ratio (r / d) between the average particle diameter (r: μm) of the polyolefin particles and the thickness (d: μm) of the resin layer is 1.5 or more, [1] to [4] The reflective film in any one.
[6] The reflective film according to any one of [1] to [5], wherein the base film is a white film having at least air bubbles inside.
[7] The base film is a white film in which a film layer (A layer) for supporting the B layer is laminated on both surfaces of a film layer (B layer) containing bubbles inside. [1] The reflective film according to any one of to [6].
[8] An edge light type backlight unit in which the reflective film according to any one of [1] to [7] is disposed so that the surface on which the resin layer is laminated faces the light guide plate.
本発明の反射フィルムは、基材フィルムの少なくとも一方の面に、粘度平均分子量が50万以上であるポリオレフィン粒子を含有する樹脂層を有する。 Hereinafter, the present invention will be described in detail together with embodiments.
The reflective film of the present invention has a resin layer containing polyolefin particles having a viscosity average molecular weight of 500,000 or more on at least one surface of a base film.
樹脂層に含有させる粘度平均分子量が50万以上であるポリオレフィン粒子としては、特に制限はされないが、これらの具体例としては、例えばエチレン、プロピレン、1-ブテン、1-ペンテン、1-ヘキセン、1-オクテン、1-デセン、1-ドデセン、4-メチル-1-ペンテン、3-メチル-1-ペンテンなどのα-オレフィンや、環状オレフィンの単独重合体または共重合体からなる粒子が挙げられる。これらの中でも、炭素数が少ないオレフィンであるエチレンあるいはプロピレンの単独重合体、およびエチレンあるいはプロピレンを主成分とする共重合体が好ましい。これらの粒子(エチレンあるいはプロピレンの単独重合体、およびエチレンあるいはプロピレンを主成分とする共重合体)は、他のポリオレフィン粒子(炭素数が比較的多いオレフィンを主成分とするポリオレフィン粒子)に比べて硬度が比較的小さいので、導光板の損傷を効果的に抑制することができるため好ましい。なお、樹脂層にポリエチレン粒子およびポリプロピレン粒子両方を含んでいてもよい。 [Polyolefin particles having a viscosity average molecular weight of 500,000 or more]
The polyolefin particles having a viscosity average molecular weight of 500,000 or more to be contained in the resin layer are not particularly limited, but specific examples thereof include, for example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, Examples thereof include particles composed of α-olefins such as octene, 1-decene, 1-dodecene, 4-methyl-1-pentene, 3-methyl-1-pentene, and homopolymers or copolymers of cyclic olefins. Among these, a homopolymer of ethylene or propylene, which is an olefin having a small number of carbon atoms, and a copolymer mainly composed of ethylene or propylene are preferable. These particles (ethylene or propylene homopolymers and copolymers based on ethylene or propylene) are compared to other polyolefin particles (polyolefin particles based on olefins having a relatively large number of carbon atoms). Since hardness is comparatively small, since damage to a light-guide plate can be suppressed effectively, it is preferable. The resin layer may contain both polyethylene particles and polypropylene particles.
本発明における樹脂層は、ポリオレフィン粒子と樹脂(バインダー)とを含有することが好ましい。樹脂としては、特に限定されないが、有機成分を主体とする樹脂が好ましく、例えばポリエステル樹脂、ポリウレタン樹脂、アクリル樹脂、メタクリル樹脂、ポリアミド樹脂、ポリエチレン樹脂、ポリプロピレン樹脂、ポリ塩化ビニル樹脂、ポリ塩化ビニリデン樹脂、ポリスチレン樹脂、ポリ酢酸ビニル樹脂、フッ素系樹脂などが挙げられる。 [Resin layer]
The resin layer in the present invention preferably contains polyolefin particles and a resin (binder). The resin is not particularly limited, but a resin mainly composed of organic components is preferable. For example, polyester resin, polyurethane resin, acrylic resin, methacrylic resin, polyamide resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyvinylidene chloride resin , Polystyrene resin, polyvinyl acetate resin, fluorine resin and the like.
基材フィルムとしては、特に限定されず、銀やアルミニウムの蒸着フィルム、銀箔やアルミニウム箔のラミネートフィルム、白色フィルム、多層積層フィルム等が挙げられる。 [Base film]
It does not specifically limit as a base film, Silver, the vapor deposition film of aluminum, the laminate film of silver foil or aluminum foil, a white film, a multilayer laminated film, etc. are mentioned.
本発明の反射フィルムは、液晶表示装置のバックライトユニットに好適である。バックライト方式としては、エッジライト型と直下型が一般的に採用されているが、本発明の反射フィルムは、どちらの方式にも適用される。特に、本発明の反射フィルムは、エッジライト型バックライト方式に好適である。 [Backlight unit of liquid crystal display]
The reflective film of the present invention is suitable for a backlight unit of a liquid crystal display device. As the backlight method, an edge light type and a direct type are generally employed, but the reflective film of the present invention is applied to both methods. In particular, the reflective film of the present invention is suitable for an edge light type backlight system.
(1)粘度平均分子量
(1-1)ポリオレフィン粒子の粘度平均分子量
JIS K7367(1999)にしたがって、粘度平均分子量(Mv)を測定する。極限粘度を[η]とすると、粘度平均分子量(Mv)は以下の式で表される。
Mv=a×[η]b
(ここで、a,bは係数であり、溶媒や高分子の組成により決定される)。なお、ポリエチレン粒子(エチレンの単独重合体およびエチレンを主成分とする共重合体を含む)およびポリプロピレン粒子(プロピレンの単独重合体およびプロピレンを主成分とする共重合体を含む)については、以下の(1-2)、(1-3)にしたがって粘度平均分子量を測定した。 [Measurement method and evaluation method]
(1) Viscosity average molecular weight (1-1) Viscosity average molecular weight of polyolefin particles Viscosity average molecular weight (Mv) is measured according to JIS K7367 (1999). When the intrinsic viscosity is [η], the viscosity average molecular weight (Mv) is represented by the following formula.
Mv = a × [η] b
(Here, a and b are coefficients and are determined by the composition of the solvent and polymer). For polyethylene particles (including ethylene homopolymer and ethylene-based copolymer) and polypropylene particles (including propylene homopolymer and propylene-based copolymer), The viscosity average molecular weight was measured according to (1-2) and (1-3).
JIS K7367-3(1999)に従って、極限粘度[η]及び粘度平均分子量(Mv)を測定した。
20mLのデカリン(ジブチルヒドロキシトルエン(BHT)を1g/L含む)にポリエチレン粒子20mgを入れ、150℃で、2時間攪拌してポリエチレン粒子を溶解させた。その溶液を135℃の恒温糟で、キャノン-フェンスケ粘度計(型番:SO)を用いて、標線間の落下時間(ts)を測定した。なお、ブランクとしてポリエチレン粒子を溶解していない、デカリンのみの落下時間(tb)を測定した。以下の式に従いポリエチレン粒子の比粘度(ηsp/C)をプロットし、濃度0に外挿した極限粘度[η]を求めた。
(ηsp/C) = (ts/tb-1)/0.1
この[η]から以下の式に従い、粘度平均分子量(Mv)を求めた。
Mv = (5.37×104)×[η]1.37。 (1-2) Viscosity average molecular weight of polyethylene particles (including ethylene homopolymer and ethylene-based copolymer) According to JIS K7367-3 (1999), intrinsic viscosity [η] and viscosity average molecular weight (Mv ) Was measured.
20 mL of decalin (containing 1 g / L of dibutylhydroxytoluene (BHT)) was charged with 20 mg of polyethylene particles and stirred at 150 ° C. for 2 hours to dissolve the polyethylene particles. The solution was measured at a constant temperature of 135 ° C. using a Canon-Fenske viscometer (model number: SO) to measure the drop time (ts) between the marked lines. In addition, the fall time (tb) of only decalin which did not melt | dissolve polyethylene particles as a blank was measured. The specific viscosity (ηsp / C) of the polyethylene particles was plotted according to the following formula, and the intrinsic viscosity [η] extrapolated to a concentration of 0 was determined.
(Ηsp / C) = (ts / tb−1) /0.1
From this [η], the viscosity average molecular weight (Mv) was determined according to the following formula.
Mv = (5.37 × 10 4 ) × [η] 1.37 .
上記(1-2)と同様にして極限粘度[η]を求め、以下の式に従って粘度平均分子量(Mv)を求めた。
Mv=(8.88×104)×[η]1.25。 (1-3) Viscosity average molecular weight of polypropylene particles (including a propylene homopolymer and a copolymer containing propylene as a main component) The intrinsic viscosity [η] was determined in the same manner as in (1-2) above, The viscosity average molecular weight (Mv) was determined according to the formula.
Mv = (8.88 × 10 4 ) × [η] 1.25 .
反射フィルムを、日本ミクロトーム研究所(株)製ロータリー式ミクロトームを使用し、ナイフ傾斜角度3°にてフィルム平面に垂直な方向に切断した。得られたフィルム断面を、走査型電子顕微鏡((株)日立製作所製S-3400N)(50μmよりも大きい粒子は500倍、それ以外は1,000倍)で観察し、その断面写真から、樹脂層に含有される粒子について無作為に選択した30個の粒子のそれぞれの最大長さを計測し、それらを平均した値を粒子の平均粒子径とした。ここで、粒子の最大長さは1つの粒子を完全に囲む面積が最も小さい正方形または長方形(すなわち、正方形または長方形の4辺に粒子が接している正方形または長方形)を描き、正方形の場合は1辺の長さ、長方形の場合は長辺の長さ(長軸径)を粒子の最大長さとした(すなわち、最も長い定方向接線径を、粒子の最大長さとした)。 (2) Average particle diameter of polyolefin particles contained in the resin layer The reflective film was cut in a direction perpendicular to the film plane at a knife inclination angle of 3 ° using a rotary microtome manufactured by Nippon Microtome Laboratories. . The cross section of the obtained film was observed with a scanning electron microscope (S-3400N manufactured by Hitachi, Ltd.) (particles larger than 50 μm were 500 times larger, otherwise 1,000 times). The maximum length of each of 30 particles randomly selected with respect to the particles contained in the layer was measured, and the average value of these was taken as the average particle diameter of the particles. Here, the maximum length of a particle is a square or rectangle having the smallest area that completely surrounds one particle (that is, a square or rectangle in which the particle is in contact with the four sides of the square or rectangle). The length of the side, and in the case of a rectangle, the length of the long side (major axis diameter) was taken as the maximum length of the particle (that is, the longest constant tangent diameter was taken as the maximum length of the particle).
反射フィルムを、日本ミクロトーム研究所(株)製ロータリー式ミクロトームを使用し、ナイフ傾斜角度3°にてフィルム平面に垂直な方向に切断した。得られたフィルム断面を、走査型電子顕微鏡((株)日立製作所製S-3400N)(500倍)を用いて観察し、樹脂層表面に粒子が見えている部分ではなく、樹脂層表面が樹脂となっている部分5箇所の厚みを測定し、その平均値を樹脂層の厚みとした。 (3) Thickness of Resin Layer The reflective film was cut in a direction perpendicular to the film plane at a knife inclination angle of 3 ° using a rotary microtome manufactured by Nippon Microtome Laboratories. The cross section of the obtained film was observed using a scanning electron microscope (S-3400N manufactured by Hitachi, Ltd.) (500 times), and the resin layer surface was not the part where the particles were seen on the resin layer surface. The thicknesses of the five portions were measured, and the average value was taken as the thickness of the resin layer.
反射フィルムを温度60℃の雰囲気下で500時間加熱した後、常温下で1時間放置し、反射フィルムの樹脂層面の変色を目視で評価した。
A:変色がない。
B:変色が認められる。 (4) Heat resistance evaluation 1 (discoloration due to heat)
The reflective film was heated in an atmosphere at a temperature of 60 ° C. for 500 hours and then allowed to stand at room temperature for 1 hour, and the discoloration of the resin layer surface of the reflective film was visually evaluated.
A: There is no discoloration.
B: Discoloration is recognized.
17インチ液晶テレビ(パナソニック(株)製、“VIERA(登録商標)” TH-L17F1)を分解し、LEDを光源とするエッジライト型バックライト(バックライトAとする)を取り出した。バックライトAの発光面の大きさは、37.5cm×21.2cmであり、対角の長さは43.1cmであった。さらにバックライトAから光学フィルム3枚、導光板(アクリル板、3.5mm厚み、導光板に形成された凸部の高さ12μm)及び反射フィルムを取り出し、本発明の実施例及び比較例の反射フィルムを搭載されていた反射フィルムと同じ形状、大きさに裁断した。搭載されていた反射フィルムの代わりに裁断した反射フィルムの樹脂層の面が導光板側を向くように設置し、導光板及び光学フィルム3枚を分解前と同じ順序及び方向で設置した。
このようにして分解および組み立てたバックライトAを温度80度の雰囲気下で1時間加熱した後、常温下で1時間放置し、再度液晶テレビを分解して、導光板の反射フィルムが接触した面の汚染状態を目視で評価した。
S:汚染がない。
A:汚染が僅かに認められるが、許容レベルである。
B:汚染されている。 (5) Heat resistance evaluation 2 (contamination of light guide plate by heat)
A 17-inch liquid crystal television (manufactured by Panasonic Corporation, “VIERA (registered trademark)” TH-L17F1) was disassembled, and an edge light type backlight (hereinafter referred to as “backlight A”) using an LED as a light source was taken out. The size of the light emitting surface of the backlight A was 37.5 cm × 21.2 cm, and the diagonal length was 43.1 cm. Further, three optical films, a light guide plate (acrylic plate, 3.5 mm thickness, height of the convex portion formed on the light guide plate 12 μm) and a reflection film are taken out from the backlight A, and the reflection of the examples and comparative examples of the present invention. The film was cut into the same shape and size as the reflective film on which the film was mounted. Instead of the mounted reflective film, the reflective film was cut so that the surface of the resin layer of the reflective film faced the light guide plate side, and the light guide plate and the three optical films were installed in the same order and direction as before disassembly.
The backlight A thus disassembled and assembled is heated for 1 hour in an atmosphere of 80 ° C., then left at room temperature for 1 hour, the liquid crystal television is disassembled again, and the surface of the light guide plate on which the reflective film is in contact The contamination state was visually evaluated.
S: There is no contamination.
A: Slight contamination is observed, but at an acceptable level.
B: Contaminated.
40インチ液晶テレビ(Samsung社製、PAVV UN40B7000WF)を分解して得られた導光板の凸部が設けられた面側に反射フィルムの樹脂層の面が接触されるように積層させた後、200gf/cm2(0.0196MPa)、100gf/cm2(0.0098MPa)及び50gf/cm2(0.0049MPa)の荷重下で反射フィルムを1m/分の線速度で引き上げ、前記導光板の表面上に発生したスクラッチ傷の程度を目視で観察し、以下の基準で評価した。
A級:いずれの荷重下においても傷が見られない。
B級:200gf/cm2の荷重下では傷が見られるが、100gf/cm2の荷重下、50gf/cm2の荷重下においては傷が見られない。
C級:200gf/cm2、100gf/cm2の荷重下では傷が見られるが、50gf/cm2の荷重下においては傷が見られない。
D級:50gf/cm2の荷重下において傷が見られる。 (6-1) Evaluation of damage to light guide plate (scratch scratch) 1
After laminating a 40-inch liquid crystal television (manufactured by Samsung, PAVV UN40B7000WF) so that the surface of the light guide plate provided with the convex portion is laminated so that the surface of the resin layer of the reflective film is in contact, 200 gf / Cm 2 (0.0196 MPa), 100 gf / cm 2 (0.0098 MPa) and 50 gf / cm 2 (0.0049 MPa) under a load of 1 m / min. The degree of scratches generated in the film was visually observed and evaluated according to the following criteria.
Class A: No scratches are seen under any load.
Class B: 200 gf / cm 2 of but scratches is observed under load, under a load of 100 gf / cm 2, not seen wounds under a load of 50 gf / cm 2.
Class C: 200gf / cm 2, but scratches observed under a load of 100 gf / cm 2, not seen wounds under a load of 50 gf / cm 2.
Class D: Scratches are observed under a load of 50 gf / cm 2 .
40インチ液晶テレビ(Samsung社製、PAVV UN40B7000WF)を分解して得られた導光板の凸部が設けられた面側に反射フィルムの樹脂層の面が接触されるように積層させた後、200gf/cm2(0.0196MPa)の荷重下で反射フィルムを1m/分の線速度で引き上げ、前記導光板の表面上に反射フィルムに含有される粒子の削れ粉が導光板に転写して導光板を汚染させているかどうかを目視で観察し、以下の基準で評価した。
A:汚染がない。
B:汚染されている。 (6-2) Evaluation of damage to light guide plate (transfer contamination of particle shaving powder) 2
After laminating a 40-inch liquid crystal television (manufactured by Samsung, PAVV UN40B7000WF) so that the surface of the light guide plate provided with the convex portion is laminated so that the surface of the resin layer of the reflective film is in contact, 200 gf The reflective film is pulled up at a linear velocity of 1 m / min under a load of / cm 2 (0.0196 MPa), and shaving powder of particles contained in the reflective film is transferred onto the light guide plate on the surface of the light guide plate. Was visually observed and evaluated according to the following criteria.
A: There is no contamination.
B: Contaminated.
52インチ液晶テレビ(ソニー社製、“BRAVIA(登録商標)”KDL-52EX700)を分解して、LEDを光源とするエッジライト型バックライトを取り出した。このバックライトの発光面の大きさは、116cm×65.5cmであり、対角の長さは133.2cmであった。さらにバックライトから光学フィルム3枚、凹型導光板(アクリル板、4mm厚み、凹部深さ55μm)及び反射フィルムを取り出し、本発明の実施例及び比較例の反射フィルムを搭載されていた反射フィルムと同じ形状、大きさに裁断した。搭載されていた反射フィルムの代わりに裁断した反射フィルムの樹脂層面が導光板側を向くように設置し、導光板及び光学フィルム3枚を分解前と同じ向き及び方向で設置した。
この液晶テレビを点灯して、目視で白点ムラを観察した。
S:白点が観察されない。
A:白点が僅かに観察されるが、許容レベルである。
B:白点が明確に観察される。 (7) Evaluation of white spot unevenness (attachment of reflective film and light guide plate) Disassembling a 52-inch LCD TV (manufactured by Sony Corporation, “BRAVIA (registered trademark)” KDL-52EX700) and using LED as the light source The light type backlight was taken out. The size of the light emitting surface of this backlight was 116 cm × 65.5 cm, and the diagonal length was 133.2 cm. Further, three optical films, a concave light guide plate (acrylic plate, 4 mm thickness, concave depth 55 μm) and a reflective film are taken out from the backlight, and are the same as the reflective film on which the reflective films of the examples and comparative examples of the present invention are mounted. Cut into shape and size. Instead of the mounted reflective film, the cut reflective film was placed so that the resin layer surface of the reflective film faces the light guide plate side, and the light guide plate and the three optical films were placed in the same direction and direction as before the disassembly.
The liquid crystal television was turned on, and white spot unevenness was visually observed.
S: A white spot is not observed.
A: A white point is slightly observed, but it is an acceptable level.
B: A white spot is clearly observed.
反射フィルムの樹脂層面とアクリル板(住友化学(株)製の「“スミペックス(登録商標)”E(クリア)」厚み3mm)との動摩擦係数をJIS K7125(1999年)に準拠して、東レ式スリップテスター200G-15C(MAKINO SEISAKUSHO製)を用いて測定した。
<測定条件>
荷重:200g
移動速度(引っ張り速度):150mm/分
<評価>
それぞれ動摩擦係数を3回測定し平均した値(平均動摩擦係数)を以下の基準で評価した。
S:平均動摩擦係数が0.3以下である。
A:平均動摩擦係数が0.3より大きく0.6以下である。
B:平均動摩擦係数が0.6より大きい。 (8) Evaluation of slipperiness The coefficient of dynamic friction between the resin layer surface of the reflective film and the acrylic plate ("Sumipex (registered trademark)" E (clear), thickness 3 mm, manufactured by Sumitomo Chemical Co., Ltd.)) is JIS K7125 (1999). In accordance with the above, measurement was performed using a Toray slip tester 200G-15C (manufactured by MAKINO SEISAKUSHO).
<Measurement conditions>
Load: 200g
Movement speed (pulling speed): 150 mm / min <Evaluation>
Each of the dynamic friction coefficients was measured three times and averaged (average dynamic friction coefficient) was evaluated according to the following criteria.
S: The average dynamic friction coefficient is 0.3 or less.
A: The average dynamic friction coefficient is greater than 0.3 and less than or equal to 0.6.
B: The average dynamic friction coefficient is larger than 0.6.
基材フィルム上に塗布された樹脂層を目視観察し、筋状ムラの発生程度を以下の基準で評価した。
S:筋状ムラは認められない。
A:薄い筋状ムラが認められる。
B:筋状ムラが明確に認められる。 (9) Evaluation of applicability of resin layer The resin layer applied on the base film was visually observed and the degree of occurrence of streaky unevenness was evaluated according to the following criteria.
S: Streaky unevenness is not recognized.
A: Thin streaky irregularities are observed.
B: Streaky unevenness is clearly recognized.
反射フィルムの樹脂層表面を走査型電子顕微鏡((株)日立製作所製S-3400N)(500倍)で、樹脂層表面に対して30度の斜角で観察し、凸部が存在しているかどうかを確認した。 (10) Confirmation of convex portions by particles on the surface of the resin layer The surface of the resin layer of the reflective film was 30 degrees with respect to the surface of the resin layer with a scanning electron microscope (S-3400N manufactured by Hitachi, Ltd.) (500 times). Observed at an oblique angle, it was confirmed whether or not a convex portion was present.
下記に示すような各種粒子を用意した。粒子の形状は、後述の低分子量ポリエチレン粒子2(不定形)以外はいずれも球状である。 [Particles to be included in the resin layer]
Various particles as shown below were prepared. The shape of the particles is spherical except for the low molecular weight polyethylene particles 2 (indefinite shape) described later.
三井化学(株)の“ミペロン(登録商標)”XM-220、粘度平均分子量200万
<ポリエチレン粒子(b);エチレンの単独重合体>
三井化学(株)の“ミペロン(登録商標)”XM-221U、粘度平均分子量200万
<ポリエチレン粒子(c);エチレンの単独重合体>
三井化学(株)の“ミペロン(登録商標)”PM-200、粘度平均分子量180万
<ポリエチレン粒子(d);エチレンの単独重合体>
三井化学(株)の“ミペロン(登録商標)”XM-330、粘度平均分子量200万
<ポリエチレン粒子(e);エチレンの単独重合体>
ヘキスト社の“ホスタレン(登録商標)”GUR4126、粘度平均分子量300万
<ポリエチレン粒子(f);エチレンの単独重合体>
チコナ社の商品名“GUR(登録商標)”4186、粘度平均分子量300万
<ポリエチレン粒子(g);エチレンの単独重合体>
チコナ社の商品名“GUR(登録商標)”2126、粘度平均分子量400万
<ポリエチレン粒子(h);エチレンの単独重合体> <Polyethylene particles (a); ethylene homopolymer>
"Miperon (registered trademark)" XM-220, Mitsui Chemicals Co., Ltd., viscosity average
“Miperon (registered trademark)” XM-221U, Mitsui Chemicals, Inc., viscosity average
“Miperon (registered trademark)” PM-200 manufactured by Mitsui Chemicals, Inc., viscosity average molecular weight 1.8 million <polyethylene particles (d); homopolymer of ethylene>
“Miperon (registered trademark)” XM-330, Mitsui Chemicals Co., Ltd., viscosity average
Hoechst's “Hostalen®” GUR4126, viscosity average molecular weight 3 million <polyethylene particles (f); homopolymer of ethylene>
Product name “GUR (registered trademark)” 4186, manufactured by Ticona Co., Ltd., viscosity average molecular weight 3 million <polyethylene particles (g); homopolymer of ethylene>
Product name “GUR (registered trademark)” 2126 of Ticona, viscosity average molecular weight 4 million <polyethylene particles (h); homopolymer of ethylene>
無水塩化マグネシウム4.76g、2-エチルヘキシルアルコール23.2mlおよびデカン25mlを120℃で2時間加熱して均一溶液とし、さらに安息香酸エチル0.9mlを添加した。この均一溶液を-20℃に冷却した後、四塩化チタン200ml中に1時間かけて攪拌滴下した。滴下終了後、この混合物を1時間半かけて90℃に昇温し、安息香酸エチル1.8mlを添加し、さらに90℃で2時間攪拌下に保持した後、固体成分を濾過によって採取した。次いで、この固体成分を四塩化チタン200mlに再び潤滑させ、90℃で2時間加熱した後、濾過により固体成分を採取した。遊離したチタン化合物が洗液中に検出されなくなるまで精製ヘキサンで充分洗浄し、固体状遷移金属触媒成分を得た。 (Preparation of solid transition metal catalyst component)
Anhydrous magnesium chloride (4.76 g), 2-ethylhexyl alcohol (23.2 ml) and decane (25 ml) were heated at 120 ° C. for 2 hours to form a homogeneous solution, and then ethyl benzoate (0.9 ml) was added. The homogeneous solution was cooled to −20 ° C., and then stirred dropwise into 200 ml of titanium tetrachloride over 1 hour. After completion of the dropwise addition, the mixture was heated to 90 ° C. over 1 hour and a half, 1.8 ml of ethyl benzoate was added, and the mixture was further kept under stirring at 90 ° C. for 2 hours, and then the solid component was collected by filtration. Next, this solid component was lubricated again with 200 ml of titanium tetrachloride, heated at 90 ° C. for 2 hours, and then collected by filtration. The solid titanium compound was sufficiently washed with purified hexane until no free titanium compound was detected in the washing solution to obtain a solid transition metal catalyst component.
内容積2Lのオートクレーブに、精製デカン1.0L、トリイソブチルアルミニウム1.0mmolおよび上記固体状遷移金属触媒成分をチタン原子に換算して0.013mmol装入した。その後、60℃まで昇温してからエチレンの供給を始め、65℃で全圧6.0kg/cm2Gを維持するようにエチレンを4時間にわたり供給した。重合終了後、降温、脱圧し、重合体130gを得た。得られた重合体の粘度平均分子量は200万であった。 (Main polymerization)
An autoclave having an internal volume of 2 L was charged with 1.0 L of purified decane, 1.0 mmol of triisobutylaluminum, and 0.013 mmol of the solid transition metal catalyst component in terms of titanium atoms. Thereafter, the temperature was raised to 60 ° C., and then ethylene supply was started, and ethylene was supplied over 4 hours so as to maintain a total pressure of 6.0 kg / cm 2 G at 65 ° C. After completion of the polymerization, the temperature was lowered and the pressure was released to obtain 130 g of a polymer. The viscosity average molecular weight of the obtained polymer was 2 million.
上記のポリエチレン粒子(h)の合成において、固体状遷移金属触媒成分の装入量、エチレン供給時の全圧およびエチレンの供給時間を調整して、粘度平均分子量が60万のポリエチレン粒子(i)を得た。 <Polyethylene particles (i); homopolymer of ethylene>
In the synthesis of the above polyethylene particles (h), polyethylene particles (i) having a viscosity average molecular weight of 600,000 are adjusted by adjusting the charged amount of the solid transition metal catalyst component, the total pressure during ethylene supply, and the ethylene supply time. Got.
上記のポリエチレン粒子(h)の合成において、固体状遷移金属触媒成分の装入量、エチレン供給時の全圧およびエチレンの供給時間を調整して、粘度平均分子量が120万のポリエチレン粒子(j)を得た。 <Polyethylene particles (j); homopolymer of ethylene>
In the synthesis of the above polyethylene particles (h), polyethylene particles (j) having a viscosity average molecular weight of 1,200,000 are adjusted by adjusting the charged amount of the solid transition metal catalyst component, the total pressure during ethylene supply, and the ethylene supply time. Got.
上記のポリエチレン粒子(h)の合成において、固体状遷移金属触媒成分の装入量、エチレン供給時の全圧およびエチレンの供給時間を調整して、粘度平均分子量が600万のポリエチレン粒子(k)を得た。 <Polyethylene particles (k); homopolymer of ethylene>
In the synthesis of the above polyethylene particles (h), polyethylene particles (k) having a viscosity average molecular weight of 6 million are adjusted by adjusting the charged amount of the solid transition metal catalyst component, the total pressure during ethylene supply, and the ethylene supply time. Got.
以下の要領で合成した。 <Polyethylene particles (l); copolymer mainly composed of ethylene>
It was synthesized as follows.
無水塩化マグネシウム75g、デカン280.3gおよび2-エチルヘキシルアルコ-ル308.3gを温度130℃で3時間加熱反応させて均一溶液とした後、この溶液中に2-イソブチル-2-イソプロピル-1,3-ジメトキシプロパン22.2mlを添加し、さらに温度100℃にて1時間攪拌混合を行なった。 (Preparation of solid transition metal catalyst component)
Anhydrous magnesium chloride (75 g), decane (280.3 g) and 2-ethylhexyl alcohol (308.3 g) were heated and reacted at a temperature of 130 ° C. for 3 hours to form a homogeneous solution, and 2-isobutyl-2-isopropyl-1, 22.2 ml of 3-dimethoxypropane was added, and the mixture was further stirred and mixed at a temperature of 100 ° C. for 1 hour.
充分に窒素置換された内容量1リットルの重合器に、室温で250mlのヘプタン、トリエチルアルミニウム2.0ミリモル、および固体状遷移金属触媒成分をチタン原子換算で0.045ミリモルを加え、温度65℃まで昇温して、重合器にエチレンを供給して圧力0.8MPaで73分間重合した。その後、温度60℃まで温度を下げ脱圧の後、窒素で系内のエチレンをパージした。次いで4-メチル-1-ペンテン350mlを添加し、温度60℃で60分間重合を行った。重合終了後、重合器から重合体粒子を取り出してろ過した後、ヘキサンで洗浄した。得られた全重合体の収量は65.3gであり、反応系に供給したエチレンの積算量と全重合体の収量の関係から算出した重合体の組成は、質量比でポリエチレン;93質量%、ポリ-4-メチル-1-ペンテン;7質量%であった。
得られた共重合体の粘度平均分子量は300万であった。 (Main polymerization)
Into a 1 liter polymerization vessel sufficiently purged with nitrogen, 250 ml of heptane, 2.0 mmol of triethylaluminum, and 0.045 mmol of a solid transition metal catalyst component in terms of titanium atoms were added at room temperature, and the temperature was 65 ° C. Then, ethylene was supplied to the polymerization vessel and polymerization was carried out at a pressure of 0.8 MPa for 73 minutes. Thereafter, the temperature was lowered to 60 ° C., and after depressurization, ethylene in the system was purged with nitrogen. Subsequently, 350 ml of 4-methyl-1-pentene was added and polymerization was carried out at a temperature of 60 ° C. for 60 minutes. After completion of the polymerization, the polymer particles were taken out from the polymerization vessel, filtered, and washed with hexane. The yield of the total polymer obtained was 65.3 g, and the composition of the polymer calculated from the relationship between the cumulative amount of ethylene supplied to the reaction system and the yield of the total polymer was polyethylene by mass ratio: 93% by mass, Poly-4-methyl-1-pentene; 7% by mass.
The viscosity average molecular weight of the obtained copolymer was 3 million.
以下の要領で合成した。 <Polypropylene particles; propylene homopolymer>
It was synthesized as follows.
内容量6literの撹拌機付のリアクターにn-ヘプタン3literを投入し、プロピレン重合用固体状チタン触媒成分30g、トリメチルアルミニウムを固体状チタン触媒成分中のチタン原子に対して10倍モル、および2,6-ジメチル-3,3-ビス(メトキシメチル)ヘプタンを固体状チタン触媒成分中のチタン原子に対して2倍モルの割合で供給した。次に、プロピレン48Nliterを装入し、槽内温度を15℃以下に保持してプロピレンを完全に反応させ、予備重合体を得た。これにイソブタンを加えて予備重合固体1.6g/literとなるまで希釈し、予備重合体スラリーとした。 (Preliminary polymerization)
3 L of n-heptane is charged into a reactor equipped with a stirrer with an internal capacity of 6 liters, 30 g of solid titanium catalyst component for propylene polymerization, 10-fold mol of trimethylaluminum with respect to titanium atoms in the solid titanium catalyst component, and 2, 6-dimethyl-3,3-bis (methoxymethyl) heptane was supplied at a ratio of 2 moles to the titanium atoms in the solid titanium catalyst component. Next, 48Nliter of propylene was charged, and the temperature in the tank was kept at 15 ° C. or lower to completely react the propylene, thereby obtaining a prepolymer. Isobutane was added thereto and diluted to 1.6 g / liter of a prepolymerized solid to prepare a prepolymer slurry.
容量600literの撹拌機付き第1段リアクターに液化プロピレンモノマー110kg、上記(1)で得た予備重合体スラリー5liter、トリエチルアルミニウム0.14モル、ジシクロペンチルジメトキシシラン0.14モルおよび水素5Nliterを装入し、温度70℃で1時間重合を行い、ポリプロピレン粒子を得た。このポリプロピレン粒子の粘度平均分子量は160万であった。 (Main polymerization)
A first stage reactor equipped with a stirrer with a capacity of 600 liters was charged with 110 kg of liquefied propylene monomer, 5 liters of the prepolymer slurry obtained in (1) above, 0.14 moles of triethylaluminum, 0.14 moles of dicyclopentyldimethoxysilane and 5Nliters of hydrogen. Then, polymerization was performed at a temperature of 70 ° C. for 1 hour to obtain polypropylene particles. The viscosity average molecular weight of the polypropylene particles was 1.6 million.
住友精化(株)製の“フロービーズ(登録商標)”LE-2080、粘度平均分子量10万以下 <Low molecular
"Flow beads (registered trademark)" LE-2080 manufactured by Sumitomo Seika Co., Ltd., viscosity average molecular weight of 100,000 or less
住友精化(株)製の“フローセン(登録商標)”UF20、粘度平均分子量10万以下 <Low molecular
"Flocene (registered trademark)" UF20 manufactured by Sumitomo Seika Co., Ltd., viscosity average molecular weight of 100,000 or less
積水化成品工業(株)製の“テクポリマー(登録商標)”MBX-30 <Crosslinked acrylic particles>
"Techpolymer (registered trademark)" MBX-30 manufactured by Sekisui Plastics Co., Ltd.
積水化成品工業(株)製の“テクポリマー(登録商標)”SSX-104 <Crosslinked acrylic particles>
"Techpolymer (registered trademark)" SSX-104 manufactured by Sekisui Plastics Co., Ltd.
東レ(株)製のSP10(ナイロン12樹脂粒子)。 <Other particles>
SP10 (nylon 12 resin particles) manufactured by Toray Industries, Inc.
白色フィルム(東レ(株)製“ルミラー(登録商標)”E6SQ)の片面に、バーコーターを使用して、樹脂層厚みが約3μmとなるように、下記の樹脂層塗布液を塗布し、100℃で乾燥して樹脂層を積層し、反射フィルムを作製した。 [Example 1]
The following resin layer coating solution was applied to one side of a white film (“Lumirror (registered trademark)” E6SQ manufactured by Toray Industries, Inc.) using a bar coater so that the resin layer thickness was about 3 μm. The resin layer was laminated by drying at 0 ° C. to produce a reflective film.
ベンゾトリアゾール含有アクリル系共重合体樹脂((株)日本触媒製“ハルスハイブリッド(登録商標)”UV-G720T 濃度40質量%溶液)70質量部、ポリエチレン粒子a(三井化学(株)の“ミペロン(登録商標)”XM-220、粘度平均分子量200万)12質量部、イソシアネート系架橋剤(日本ポリウレタン工業(株)“コロネート(登録商標)”HL、濃度75質量%)2.7質量部、酢酸エチル55質量部を攪拌しながら添加して塗布液を調製した。 <Resin layer coating solution>
70 parts by mass of benzotriazole-containing acrylic copolymer resin (“HALS HYBRID (registered trademark)” UV-G720T concentration 40% by mass solution manufactured by Nippon Shokubai Co., Ltd.), polyethylene particles a (“Miperon (Mitsui Chemical Co., Ltd.)” (Registered trademark) “XM-220, viscosity average
実施例1の樹脂層塗布液におけるポリエチレン粒子を表1に示す粒子に変更した以外は、実施例1と同様にして反射フィルムを作製した。尚、実施例4および6は、樹脂層厚みが約6μmとなるように塗布した。 [Examples 2 to 13 and Comparative Examples 1 to 4]
A reflective film was produced in the same manner as in Example 1 except that the polyethylene particles in the resin layer coating solution of Example 1 were changed to the particles shown in Table 1. Examples 4 and 6 were applied so that the resin layer thickness was about 6 μm.
以下の樹脂層塗布液に変更する以外は、実施例1と同様にして反射フィルムを作製した。 [Example 14]
A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
ベンゾトリアゾール含有アクリル系共重合体樹脂((株)日本触媒製“ハルスハイブリッド(登録商標)”UV-G720T 濃度40質量%溶液)50質量部、ポリエチレン粒子a(三井化学(株)の“ミペロン(登録商標)”XM-220、粘度平均分子量200万)20質量部、イソシアネート系架橋剤(日本ポリウレタン工業(株)“コロネート(登録商標)”HL、濃度75質量%)2.7質量部、酢酸エチル67質量部を攪拌しながら添加して塗布液を調製した。 <Resin layer coating solution>
Benzotriazole-containing acrylic copolymer resin (“Hals Hybrid (registered trademark)” manufactured by Nippon Shokubai Co., Ltd.), 50 parts by mass, polyethylene particles a (Mitrone (Mitsui Chemicals) (Registered trademark) “XM-220, viscosity average
以下の樹脂層塗布液に変更する以外は、実施例1と同様にして反射フィルムを作製した。 [Example 15]
A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
ベンゾトリアゾール含有アクリル系共重合体樹脂((株)日本触媒製“ハルスハイブリッド(登録商標)”UV-G720T 濃度40質量%溶液)85質量部、ポリエチレン粒子a(三井化学(株)の“ミペロン(登録商標)”XM-220、粘度平均分子量200万)6質量部、イソシアネート系架橋剤(日本ポリウレタン工業(株)“コロネート(登録商標)”HL、濃度75質量%)2.7質量部、酢酸エチル46質量部を攪拌しながら添加して塗布液を調製した。 <Resin layer coating solution>
Benzotriazole-containing acrylic copolymer resin (manufactured by Nippon Shokubai Co., Ltd. “Hals Hybrid (registered trademark)” UV-G720T concentration 40 mass% solution) 85 parts by mass, polyethylene particles a (Mitsubishi Chemical Co., Ltd. (Registered trademark) “XM-220, viscosity average
以下の樹脂層塗布液に変更する以外は、実施例1と同様にして反射フィルムを作製した。 [Example 16]
A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
ベンゾトリアゾール含有アクリル系共重合体樹脂((株)日本触媒製“ハルスハイブリッド(登録商標)”UV-G720T 濃度40質量%溶液)16質量部、ポリエチレン粒子a(三井化学(株)の“ミペロン(登録商標)”XM-220、粘度平均分子量200万)33.6質量部、イソシアネート系架橋剤(日本ポリウレタン工業(株)“コロネート(登録商標)”HL、濃度75質量%)2.7質量部、酢酸エチル87質量部を攪拌しながら添加して塗布液を調製した。 <Resin layer coating solution>
Benzotriazole-containing acrylic copolymer resin (manufactured by Nippon Shokubai Co., Ltd. “HALS HYBRID (registered trademark)” UV-G720T concentration 40% by mass solution) 16 parts by mass, polyethylene particles a (Mitrone (Mitsui Chemicals) (Registered trademark) "XM-220, viscosity average
以下の樹脂層塗布液に変更する以外は、実施例1と同様にして反射フィルムを作製した。 [Example 17]
A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
ベンゾトリアゾール含有アクリル系共重合体樹脂((株)日本触媒製“ハルスハイブリッド(登録商標)”UV-G720T 濃度40質量%溶液)21.3質量部、ポリエチレン粒子a(三井化学(株)の“ミペロン(登録商標)”XM-220、粘度平均分子量200万)31.5質量部、イソシアネート系架橋剤(日本ポリウレタン工業(株)“コロネート(登録商標)”HL、濃度75質量%)2.7質量部、酢酸エチル84質量部を攪拌しながら添加して塗布液を調製した。 <Resin layer coating solution>
21.3 parts by mass of a benzotriazole-containing acrylic copolymer resin (manufactured by Nippon Shokubai Co., Ltd. “Hals Hybrid (registered trademark)” UV-G720T concentration 40% by mass solution), polyethylene particles a (“Mitsui Chemicals Co., Ltd.” Mipperon (registered trademark) “XM-220, viscosity average
以下の樹脂層塗布液に変更する以外は、実施例1と同様にして反射フィルムを作製した。 [Example 18]
A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
ベンゾトリアゾール含有アクリル系共重合体樹脂((株)日本触媒製“ハルスハイブリッド(登録商標)”UV-G720T 濃度40質量%溶液)96.8質量部、ポリエチレン粒子a(三井化学(株)の“ミペロン(登録商標)”XM-220、粘度平均分子量200万)1.3質量部、イソシアネート系架橋剤(日本ポリウレタン工業(株)“コロネート(登録商標)”HL、濃度75質量%)2.7質量部、酢酸エチル39質量部を攪拌しながら添加して塗布液を調製した。 <Resin layer coating solution>
96.8 parts by mass of a benzotriazole-containing acrylic copolymer resin (“HALS HYBRID (registered trademark)” UV-G720T concentration 40 mass% solution manufactured by Nippon Shokubai Co., Ltd.), polyethylene particles a (“Mitsui Chemicals Co., Ltd.” MIPERON (registered trademark) “XM-220, viscosity average
以下の樹脂層塗布液に変更する以外は、実施例1と同様にして反射フィルムを作製した。 [Example 19]
A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
ベンゾトリアゾール含有アクリル系共重合体樹脂((株)日本触媒製“ハルスハイブリッド(登録商標)”UV-G720T 濃度40質量%溶液)94.8質量部、ポリエチレン粒子a(三井化学(株)の“ミペロン(登録商標)”)XM-220、粘度平均分子量200万)2.1質量部、イソシアネート系架橋剤(日本ポリウレタン工業(株)“コロネート(登録商標)”HL、濃度75質量%)2.7質量部、酢酸エチル40質量部を攪拌しながら添加して塗布液を調製した。 <Resin layer coating solution>
94.8 parts by mass of a benzotriazole-containing acrylic copolymer resin (“Hals Hybrid (registered trademark)” UV-G720T concentration 40 mass% solution manufactured by Nippon Shokubai Co., Ltd.), polyethylene particles a (“Mitsui Chemical Co., Ltd.” 1. MIPELON (registered trademark) ”) XM-220, 2.1 parts by mass of viscosity average
以下の樹脂層塗布液に変更する以外は、実施例1と同様にして反射フィルムを作製した。 [Example 20]
A reflective film was produced in the same manner as in Example 1 except that the following resin layer coating solution was used.
ベンゾトリアゾール含有アクリル系共重合体樹脂((株)日本触媒製“ハルスハイブリッド(登録商標)”UV-G720T 濃度40質量%溶液)86.3質量部、ポリエチレン粒子a(三井化学(株)の“ミペロン(登録商標)”XM-220、粘度平均分子量200万)3.4質量部、ナイロン粒子(東レ(株)のSP10)2.1質量部、イソシアネート系架橋剤(日本ポリウレタン工業(株)“コロネート(登録商標)”HL、濃度75質量%)2.7質量部、酢酸エチル45質量部を攪拌しながら添加して塗布液を調製した。 <Resin layer coating solution>
Benzotriazole-containing acrylic copolymer resin (manufactured by Nippon Shokubai "Hals Hybrid (registered trademark)" UV-G720T concentration 40 mass% solution) 86.3 parts by mass, polyethylene particles a ("Mitsui Chemical Co., Ltd." MIPERON (registered trademark) “XM-220, viscosity average
上記の実施例および比較例で作製した反射フィルムについて、前述した測定および評価を行った。その結果を表1、2に示す。尚、実施例および比較例のいずれも、樹脂層表面に粒子による凸部が存在することが確認された。 [Evaluation]
About the reflective film produced by said Example and comparative example, the measurement and evaluation which were mentioned above were performed. The results are shown in Tables 1 and 2. In addition, it was confirmed that the convex part by particle | grains exists in the resin layer surface in any of an Example and a comparative example.
架橋アクリル粒子を用いた比較例4は、導光板の損傷が劣っており、また、平均粒子径が比較的小さい粒子を用いているので、白点ムラの発生が見られる。 In Comparative Example 3 using the crosslinked acrylic particles, the light guide plate is poorly damaged.
In Comparative Example 4 using the crosslinked acrylic particles, the light guide plate is inferior in damage, and since the particles having a relatively small average particle diameter are used, white spot unevenness is observed.
2 粒子(ポリオレフィン粒子) 1 Coating with
Claims (8)
- 基材フィルムの少なくとも一方の面に、粘度平均分子量が50万以上であるポリオレフィン粒子を含有する樹脂層を有することを特徴とする反射フィルム。 A reflective film comprising a resin layer containing polyolefin particles having a viscosity average molecular weight of 500,000 or more on at least one surface of a base film.
- 前記ポリオレフィン粒子がポリエチレン粒子および/またはポリプロピレン粒子である、請求項1に記載の反射フィルム。 The reflective film according to claim 1, wherein the polyolefin particles are polyethylene particles and / or polypropylene particles.
- 前記ポリオレフィン粒子の平均粒子径(r:μm)が5~100μmである、請求項1または2に記載の反射フィルム。 3. The reflective film according to claim 1, wherein the polyolefin particles have an average particle diameter (r: μm) of 5 to 100 μm.
- 前記樹脂層における前記ポリオレフィン粒子の含有量が、樹脂層の固形分総量100質量%に対して3~75質量%である、請求項1~3のいずれかに記載の反射フィルム。 The reflective film according to any one of claims 1 to 3, wherein the content of the polyolefin particles in the resin layer is 3 to 75 mass% with respect to 100 mass% of the total solid content of the resin layer.
- 前記ポリオレフィン粒子の平均粒子径(r:μm)と前記樹脂層の厚み(d:μm)との比率(r/d)が1.5以上である、請求項1~4のいずれかに記載の反射フィルム。 The ratio (r / d) between the average particle diameter (r: μm) of the polyolefin particles and the thickness (d: μm) of the resin layer is 1.5 or more, according to any one of claims 1 to 4. Reflective film.
- 前記基材フィルムが、少なくとも内部に気泡を有する白色フィルムである、請求項1~5のいずれかに記載の反射フィルム。 6. The reflective film according to claim 1, wherein the base film is a white film having at least air bubbles inside.
- 前記基材フィルムが、内部に気泡を含有するフィルム層(B層)の両面に前記B層を支持するためのフィルム層(A層)が積層された白色フィルムである、請求項1~6のいずれかに記載の反射フィルム。 The base film is a white film in which a film layer (A layer) for supporting the B layer is laminated on both surfaces of a film layer (B layer) containing bubbles therein. The reflective film in any one.
- 請求項1~7のいずれかに記載の反射フィルムが、その樹脂層が積層された面を導光板と向き合うように配置されてなる、エッジライト型バックライトユニット。 An edge light type backlight unit, wherein the reflective film according to any one of claims 1 to 7 is disposed so that a surface on which the resin layer is laminated faces a light guide plate.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015526797A JP6232063B2 (en) | 2014-05-30 | 2015-05-20 | Reflective film and edge light type backlight unit using the same |
CN201580025454.7A CN106461822B (en) | 2014-05-30 | 2015-05-20 | Reflective film and edge-light type backlight unit using same |
KR1020167031175A KR20170012219A (en) | 2014-05-30 | 2015-05-20 | Reflective film and edge-lit backlight unit using same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-112066 | 2014-05-30 | ||
JP2014112066 | 2014-05-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015182448A1 true WO2015182448A1 (en) | 2015-12-03 |
Family
ID=54698785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/064424 WO2015182448A1 (en) | 2014-05-30 | 2015-05-20 | Reflective film and edge-lit backlight unit using same |
Country Status (5)
Country | Link |
---|---|
JP (2) | JP6232063B2 (en) |
KR (1) | KR20170012219A (en) |
CN (1) | CN106461822B (en) |
TW (1) | TWI661936B (en) |
WO (1) | WO2015182448A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019093217A1 (en) * | 2017-11-08 | 2019-05-16 | 東洋紡株式会社 | Polyethylene resin film |
US12001044B2 (en) | 2021-10-15 | 2024-06-04 | Nichia Corporation | Light emitting module and planar light source |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006083230A (en) * | 2004-09-14 | 2006-03-30 | Mitsubishi Engineering Plastics Corp | Aromatic polycarbonate resin composition and its molded article |
JP2009202532A (en) * | 2008-01-30 | 2009-09-10 | Teijin Ltd | Laminated reflective sheet comprising porous membrane and thin metal plate |
JP2011137060A (en) * | 2009-12-28 | 2011-07-14 | Sumika Styron Polycarbonate Ltd | Flame-retardant polycarbonate resin composition excellent in light reflection and molded product obtained therefrom |
JP2013205599A (en) * | 2012-03-28 | 2013-10-07 | Panasonic Corp | Screen for projection and whiteboard device using the same |
US20130314796A1 (en) * | 2011-02-21 | 2013-11-28 | Kazutoshi Hitomi | Light reflection plate |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3683965B2 (en) * | 1995-01-27 | 2005-08-17 | 三井化学株式会社 | Light reflector and light reflector using the same |
JP4712252B2 (en) | 2001-09-19 | 2011-06-29 | 恵和株式会社 | Reflective sheet and backlight unit using the same |
JP4050564B2 (en) * | 2002-07-23 | 2008-02-20 | ダイセル化学工業株式会社 | Method for producing anisotropic light scattering sheet |
JP2006023342A (en) * | 2004-07-06 | 2006-01-26 | Seiko Instruments Inc | Screen for projection and image projection system using the same |
JP4606133B2 (en) * | 2004-07-13 | 2011-01-05 | 三菱樹脂株式会社 | Writing board / reflective screen film and dual-use board using this film |
JP2008512719A (en) | 2004-09-13 | 2008-04-24 | エスケーシー ハース ディスプレイ フィルムズ カンパニー,リミテッド | Reflective sheet and backlight unit using the same |
JP2006243453A (en) * | 2005-03-04 | 2006-09-14 | Toray Ind Inc | Screen |
JP2007176999A (en) * | 2005-12-27 | 2007-07-12 | Mitsubishi Plastics Ind Ltd | Aliphatic polyester resin reflective film and reflector plate equipped with the reflective film |
EP2447602B1 (en) | 2006-06-23 | 2015-05-27 | Toray Industries, Inc. | White reflection film |
JP5391617B2 (en) * | 2007-09-28 | 2014-01-15 | 東レ株式会社 | White film and surface light source using the same |
CN101809468B (en) * | 2007-09-28 | 2011-12-28 | 东丽株式会社 | White film and surface light sources with the same |
JP2010044238A (en) | 2008-08-13 | 2010-02-25 | Teijin Dupont Films Japan Ltd | Reflection film for liquid crystal display device |
JP5388505B2 (en) | 2008-08-18 | 2014-01-15 | 帝人デュポンフィルム株式会社 | Reflective film for liquid crystal display |
JP5635229B2 (en) | 2008-10-01 | 2014-12-03 | 帝人デュポンフィルム株式会社 | Reflective film for liquid crystal display |
JP5564808B2 (en) * | 2009-03-24 | 2014-08-06 | 東レ株式会社 | White reflective film |
WO2011105294A1 (en) | 2010-02-24 | 2011-09-01 | 東レ株式会社 | White reflective film for edge-lit backlight and backlight using the aforementioned |
JP5744484B2 (en) | 2010-11-15 | 2015-07-08 | 帝人デュポンフィルム株式会社 | Reflective film |
JP5739178B2 (en) | 2011-01-31 | 2015-06-24 | 帝人デュポンフィルム株式会社 | Reflective film |
CN103443529A (en) * | 2011-03-29 | 2013-12-11 | 东丽株式会社 | White-colored reflection film for edge-ight type backlight, and liquid crystal display backlight using same |
-
2015
- 2015-05-20 WO PCT/JP2015/064424 patent/WO2015182448A1/en active Application Filing
- 2015-05-20 CN CN201580025454.7A patent/CN106461822B/en not_active Expired - Fee Related
- 2015-05-20 JP JP2015526797A patent/JP6232063B2/en not_active Expired - Fee Related
- 2015-05-20 KR KR1020167031175A patent/KR20170012219A/en unknown
- 2015-05-25 TW TW104116602A patent/TWI661936B/en not_active IP Right Cessation
-
2016
- 2016-05-13 JP JP2016096877A patent/JP6226024B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006083230A (en) * | 2004-09-14 | 2006-03-30 | Mitsubishi Engineering Plastics Corp | Aromatic polycarbonate resin composition and its molded article |
JP2009202532A (en) * | 2008-01-30 | 2009-09-10 | Teijin Ltd | Laminated reflective sheet comprising porous membrane and thin metal plate |
JP2011137060A (en) * | 2009-12-28 | 2011-07-14 | Sumika Styron Polycarbonate Ltd | Flame-retardant polycarbonate resin composition excellent in light reflection and molded product obtained therefrom |
US20130314796A1 (en) * | 2011-02-21 | 2013-11-28 | Kazutoshi Hitomi | Light reflection plate |
JP2013205599A (en) * | 2012-03-28 | 2013-10-07 | Panasonic Corp | Screen for projection and whiteboard device using the same |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019093217A1 (en) * | 2017-11-08 | 2019-05-16 | 東洋紡株式会社 | Polyethylene resin film |
JPWO2019093217A1 (en) * | 2017-11-08 | 2020-12-10 | 東洋紡株式会社 | Polyethylene resin film |
JP7200943B2 (en) | 2017-11-08 | 2023-01-10 | 東洋紡株式会社 | polyethylene resin film |
US12001044B2 (en) | 2021-10-15 | 2024-06-04 | Nichia Corporation | Light emitting module and planar light source |
Also Published As
Publication number | Publication date |
---|---|
JP2016180991A (en) | 2016-10-13 |
CN106461822A (en) | 2017-02-22 |
KR20170012219A (en) | 2017-02-02 |
JP6232063B2 (en) | 2017-11-15 |
CN106461822B (en) | 2019-12-13 |
TWI661936B (en) | 2019-06-11 |
JPWO2015182448A1 (en) | 2017-04-20 |
JP6226024B2 (en) | 2017-11-08 |
TW201545879A (en) | 2015-12-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6355204B2 (en) | White reflective film for edge light type backlight of liquid crystal display and backlight using the same | |
TW200829962A (en) | White polyester film for light reflecting plate | |
WO2005116699A1 (en) | Light reflector and surface light source device using the same | |
JP6226024B2 (en) | Edge light type backlight unit using reflective film | |
JP5464997B2 (en) | Light reflector and surface light source device | |
WO2016042992A1 (en) | Reflective film and edge-lit backlight unit using same | |
WO2016204234A1 (en) | Reflection film and reflection unit for surface light source device | |
KR20110036580A (en) | Light reflector, and planar light source device and illuminating device using light reflector | |
TWI400486B (en) | A reflector, and a light source device and a lighting device using the same | |
JP2011075779A (en) | White reflection film | |
US20060158585A1 (en) | Light-reflector and planar light source using same | |
KR102452766B1 (en) | Reflective film | |
KR102373640B1 (en) | Laminated film | |
JP2017044718A (en) | Reflective film and edge-light backlight having the same | |
WO2003104713A1 (en) | Surface light source device and liquid crystal display device | |
JP5086606B2 (en) | Light reflector and surface light source device and illumination device using the same | |
JP4836414B2 (en) | Light reflector and surface light source device using the same | |
WO2010073611A1 (en) | Light reflector and surface light source apparatus | |
JP2017090560A (en) | Reflective film and edge-light backlight unit having the same | |
JP4914562B2 (en) | Light reflector and surface light source device using the same | |
TWI844655B (en) | Reflective Materials | |
WO2017131030A1 (en) | Reflective film for edge-light-type backlight, and liquid crystal display backlight using same | |
JP2018189681A (en) | Reflection film for edge light type backlight and backlight for liquid crystal displays using the same | |
TWI612341B (en) | Light reflecting film and edge-light type backlight | |
JP2018141884A (en) | Reflection film for edge-light type backlight and backlight for liquid crystal display using the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2015526797 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15799191 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20167031175 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15799191 Country of ref document: EP Kind code of ref document: A1 |