WO2012020837A1 - Corps réfléchissant la lumière, dispositif d'éclairage, panneau illumine, et dispositif à source de lumière de surface - Google Patents

Corps réfléchissant la lumière, dispositif d'éclairage, panneau illumine, et dispositif à source de lumière de surface Download PDF

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Publication number
WO2012020837A1
WO2012020837A1 PCT/JP2011/068426 JP2011068426W WO2012020837A1 WO 2012020837 A1 WO2012020837 A1 WO 2012020837A1 JP 2011068426 W JP2011068426 W JP 2011068426W WO 2012020837 A1 WO2012020837 A1 WO 2012020837A1
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Prior art keywords
thermoplastic resin
resin film
light reflector
light
layer
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PCT/JP2011/068426
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English (en)
Japanese (ja)
Inventor
上田　隆彦
廣井　洋介
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株式会社ユポ・コーポレーション
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Application filed by 株式会社ユポ・コーポレーション filed Critical 株式会社ユポ・コーポレーション
Priority to KR1020137006228A priority Critical patent/KR20130108290A/ko
Priority to CN2011800495649A priority patent/CN103154783A/zh
Publication of WO2012020837A1 publication Critical patent/WO2012020837A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/14—Arrangements of reflectors therein
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/14—Arrangements of reflectors therein
    • G09F2013/147—Arrangements of reflectors therein plane reflectors

Definitions

  • the present invention relates to a light reflector useful as a light reflecting member used in a lighting fixture or the like. Specifically, the present invention relates to a light reflector in which a thermoplastic resin film having excellent light reflectance and a metal plate are laminated. Moreover, this invention relates to the lighting fixture etc. which used this light reflector.
  • a plastic member or the like obtained by depositing a metal thin film or a metal plate coated with a white pigment is used.
  • these lighting fixtures and the like have been required to have high performance (high light reflectivity) and cost reduction.
  • a reflecting member on which a metal thin film is deposited has a problem that the processing cost is particularly high.
  • the specular gloss due to the metal thin film is a high gloss and specular reflection component with a high light reflectivity, especially when used for lighting fixtures such as base lights, causing glare and glare.
  • the reflective member which coated the white pigment on the metal plate has a problem of insufficient performance such as low light reflectance.
  • the light reflectance is further lowered with time due to discoloration of the coating component due to short wavelength light (ultraviolet rays) and easy contamination due to static electricity.
  • the light reflectors described in Patent Documents 1 and 2 have a problem that wrinkles tend to occur on the reflecting surface when drawing into a member.
  • the light reflector described in Patent Document 3 has a problem that it has a low light reflectivity similar to that coated with a white pigment, and is easily discolored by ultraviolet light or the like. For this reason, satisfactory performance as a light reflector has not been achieved.
  • the present invention has a high light reflectance and a high light diffusion performance, can be manufactured relatively easily, and does not generate wrinkles that cause problems when drawn. It was made into the subject to provide the light reflector which consists of the film which has the outstanding characteristic, and a metal plate.
  • thermoplastic resin film having specific light reflectance, glossiness, and porosity is used. That is, the present invention has been completed with a light reflector having the following characteristics.
  • the present invention is a light reflector having a structure in which a thermoplastic resin film is laminated on at least one surface of a metal plate, and the light reflection rate of the light reflection surface is 95 to 100%.
  • the glossiness is 0 to 60%
  • the thermoplastic resin film contains a filler
  • the porosity represented by the following formula (1) of the thermoplastic resin film is 5 to 25%.
  • the present invention relates to a light reflector characterized by the above.
  • the thermoplastic resin film comprises a layer constituting more than 50% of the total thickness of the thermoplastic resin film and one or more layers constituting less than 50% of the total thickness of the thermoplastic resin film.
  • the layer constituting more than 50% of the total thickness of the thermoplastic resin film includes a filler having an average particle diameter or an average dispersed particle diameter of 0.05 to 0.5 ⁇ m, and the total thickness of the thermoplastic resin film
  • the width of the wrinkle generated on the surface of the thermoplastic resin film when bent to a 90 ° angle in accordance with the JIS-Z-2248: 2006 push-bending method is less than 5 mm.
  • the light reflector of the present invention can be manufactured relatively easily. And since it is excellent in light reflectivity, reduction in the number of lamps can be achieved when it is incorporated in a lighting fixture or the like. Further, by controlling the porosity of the thermoplastic resin film within a predetermined range, it is possible to suppress wrinkling of the film due to drawing and to prevent a decrease in manufacturing yield. From these things, the cost reduction effect is very high. Further, since the light reflector of the present invention is excellent in light diffusibility, there is no problem in terms of performance such as dazzling due to glare of illumination. Furthermore, the light reflector of the present invention hardly undergoes discoloration due to short wavelength light (ultraviolet rays) and is less likely to be charged with static electricity. For this reason, even when used for a long time, the performance is stable with little decrease in light reflectance.
  • the light reflector of the present invention is a heat-containing filler containing a light reflectance of 95 to 100%, a glossiness of 0 to 60%, and a porosity represented by the following formula (1) of 5 to 25%.
  • the present invention relates to a light reflector in which a plastic resin film is laminated on at least one surface of a metal plate. (Where ⁇ 0 is the true density and ⁇ is the density)
  • ⁇ 0 is the true density and ⁇ is the density
  • the light reflector of the present invention is characterized in that the light reflectance of the light reflecting surface is 95 to 100%.
  • the light reflectance is preferably 96% to 100%, more preferably 97% to 100%.
  • the light reflectance referred to in this specification is a reflectance measured with light having a wavelength of 550 nm.
  • the light reflection surface of the light reflector of the present invention is the surface of a thermoplastic resin film constituting the light reflector. High light reflectivity in the light reflector of the present invention is achieved by the thermoplastic resin film having pores.
  • the light reflectance can be essentially adjusted by the porosity, and the higher the porosity, the higher the light reflectance. However, in the present invention, the porosity range is defined in consideration of the workability described later.
  • the light reflector of the present invention is also characterized in that the glossiness of the light reflecting surface is 0 to 60%.
  • the glossiness is preferably 2 to 50%, more preferably 5 to 40%. When the glossiness exceeds 60%, it is not preferable because glare occurs when used as a reflecting member such as a lighting fixture.
  • the glossiness in the light reflector of the present invention can be adjusted by the filler concentration, filler particle size, and thickness of the thermoplastic resin film. In particular, it can be adjusted by the filler concentration, filler particle size, and thickness of the layer constituting the surface of the thermoplastic resin film.
  • the light reflector of the present invention is also characterized in that the thermoplastic resin film constituting the light reflector has a porosity of 5 to 25%.
  • the porosity is preferably 5 to 20%, more preferably 5 to 15%.
  • the porosity exceeds 25%, when the light reflector of the present invention is drawn, wide wrinkles are generated in the thermoplastic resin film, which is not preferable because the yield decreases as the appearance deteriorates.
  • the porosity is less than 5%, the light reflectance of the thermoplastic resin film is lowered, and it is difficult to obtain desired light reflection performance.
  • thermoplastic resin used for the thermoplastic resin film it is preferable to use a polyolefin resin.
  • polyolefin resins include ethylene resins such as high density polyethylene, medium density polyethylene, and low density polyethylene, propylene resins, polymethyl-1-pentene, and ethylene-cyclic olefin copolymers. These may be used in combination of two or more.
  • Propylene resins include propylene homopolymers and copolymers of propylene as a main component and ⁇ -olefins such as ethylene, 1-butene, 1-hexene, 1-heptene, 4-methyl-1-pentene. Can be used.
  • the stereoregularity is not particularly limited, and isotactic or syndiotactic and those showing various degrees of stereoregularity can be used.
  • the copolymer may be a binary system, a ternary system, or a quaternary system, and may be a random copolymer or a block copolymer.
  • the thermoplastic resin film preferably contains 25 to 95% by weight of thermoplastic resin, more preferably 40 to 92% by weight, and still more preferably 55 to 90% by weight. If the content of the thermoplastic resin in the thermoplastic resin film is 25% by weight or more, there is a tendency that wrinkles due to void collapse are less likely to occur during drawing. On the other hand, if it is 95% by weight or less, it is easy to obtain a sufficient porosity and a desired light reflectance tends to be obtained. When the thermoplastic resin film constituting the light reflector is composed of a plurality of layers, the layer constituting more than 50% of the total thickness of the thermoplastic resin film may contain 45% by weight or more and less than 95% by weight of the thermoplastic resin.
  • the content is preferably 50% by weight or more and less than 85% by weight, more preferably 55 to 75% by weight. If the thermoplastic resin content of the layer constituting more than 50% of the total thickness of the thermoplastic resin film is large, the thermoplastic resin content of the other layers can be relatively low.
  • the thermoplastic resin film contains a filler as a nucleating agent that forms pores therein.
  • the filler used here include various inorganic fillers or organic fillers that can form pores in the film.
  • the inorganic filler include heavy calcium carbonate, precipitated calcium carbonate, calcined clay, talc, titanium oxide, barium sulfate, aluminum sulfate, silica, zinc oxide, magnesium oxide, diatomaceous earth, and the like.
  • the surface treatment goods by the various surface treatment agent of the said inorganic filler can also be illustrated.
  • heavy calcium carbonate, precipitated calcium carbonate and their surface-treated products, clay, and diatomaceous earth because they are inexpensive and have good pore forming properties during stretching.
  • surface treated products with various surface treatment agents of heavy calcium carbonate and precipitated calcium carbonate are particularly preferred.
  • the surface treatment agent examples include resin acids, fatty acids, organic acids, sulfate ester type anionic surfactants, sulfonic acid type anionic surfactants, petroleum resin acids, salts thereof such as sodium, potassium, and ammonium, or These fatty acid esters, resin acid esters, waxes, paraffins, and the like are preferable, and nonionic surfactants, diene polymers, titanate coupling agents, silane coupling agents, phosphoric acid coupling agents, and the like are also preferable.
  • sulfate ester type anionic surfactant examples include long chain alcohol sulfate ester, polyoxyethylene alkyl ether sulfate ester, sulfated oil and the like, or salts thereof such as sodium and potassium.
  • activator examples include alkylbenzene sulfonic acid, alkyl naphthalene sulfonic acid, paraffin sulfonic acid, ⁇ -olefin sulfonic acid, alkyl sulfosuccinic acid and the like, and salts thereof such as sodium and potassium.
  • Examples of the fatty acid include caproic acid, caprylic acid, pelargonic acid, capric acid, undecanoic acid, lauric acid, myristic acid, palmitic acid, stearic acid, ariaic acid, oleic acid, linoleic acid, linolenic acid, eleostearic acid.
  • An acid etc. are mentioned.
  • Examples of the organic acid include maleic acid and sorbic acid.
  • Examples of the diene polymer include polybutadiene and isoprene.
  • Examples of the nonionic surfactant include a polyethylene glycol ester type surfactant.
  • Examples of surface treatment methods for inorganic fillers using these surface treatment agents include, for example, JP-A-5-43815, JP-A-5-139728, JP-A-7-300568, and JP-A-10-176079.
  • the methods described in JP-A-11-256144, JP-A-11-349846, JP-A-2001-158863, JP-A-2002-220547, JP-A-2002-363443, etc. can be used.
  • a resin having its own melting point or glass transition point (for example, 120 to 300 ° C.) higher than the melting point or glass transition point of the main thermoplastic resin constituting the film can be preferably used.
  • a propylene resin is used as the main thermoplastic resin constituting the film
  • examples thereof include a copolymer, polyethylene sulfide, polyimide, polyethyl ether ketone, and polyphenylene sulfide. These have a higher melting point or glass transition temperature than the propylene-based resin, which is the main thermoplastic resin constituting the film, and are incompatible with the propylene-based resin. It is preferable because it is good.
  • thermoplastic resin film one kind selected from inorganic fillers or organic fillers may be used alone, or two or more kinds selected may be used in combination. When using combining 2 or more types, you may mix and use an organic filler and an inorganic filler.
  • the average particle diameter of the inorganic filler and the average dispersed particle diameter of the organic filler are, for example, the observation of the primary particle diameter by a microtrack method or a scanning electron microscope (in the present invention, the average value of 100 particles is defined as the average particle diameter). ), Conversion from specific surface area (in the present invention, the specific surface area was measured using a powder specific surface area measuring device SS-100 manufactured by Shimadzu Corporation), and the like.
  • the average particle diameter of the inorganic filler added to the thermoplastic resin film in order to adjust the pore size generated by stretch molding, or It is preferable to control the average dispersed particle size of the organic filler.
  • the base material layer (A) constituting more than 50% of the total thickness of the thermoplastic resin film and one or more layers constituting less than 50% of the total thickness
  • the base material layer (A) The average particle size or average dispersed particle size of the filler contained is preferably 1 ⁇ m or less, more preferably 0.05 to 0.5 ⁇ m, and even more preferably 0.1 to 0.4 ⁇ m. If the average particle size or average dispersed particle size of the filler contained in the base material layer (A) is 1.0 ⁇ m or less, the resulting pores are also fine and appropriate size, and the pores are reduced during the drawing process. There is a tendency that wrinkles due to crushing are easily suppressed.
  • the average particle size or average dispersed particle size of the filler contained in the layer constituting less than 50% of the total thickness of the thermoplastic resin film is preferably 0.05 to 10 ⁇ m, more preferably 1 to 7 ⁇ m. Preferably, the thickness is 1 to 5 ⁇ m.
  • the average particle size or average dispersed particle size of the filler contained in the layer constituting the average particle size or average dispersed particle size of the filler contained in the base material layer (A) is less than 50% of the total thickness of the thermoplastic resin film. It is preferably larger than the diameter.
  • the layer constituting less than 50% of the total thickness of the thermoplastic resin film preferably has a layer thickness of less than 30% of the total thickness of the thermoplastic resin film, more preferably less than 20%, and less than 10% More preferably.
  • Examples of the layer constituting less than 50% of the total thickness of the thermoplastic resin film include a gloss adjusting layer (B) and an intermediate layer (C) described later. In the present invention, it is particularly preferable to employ the gloss adjusting layer (B).
  • the amount of filler contained in the base material layer (A) constituting more than 50% of the total thickness of the thermoplastic resin film preferably 5% by weight or more
  • the amount may be less than 55% by weight, more preferably 15% by weight or more and less than 50% by weight, and further preferably 25 to 45% by weight.
  • wrinkle generation can be prevented more effectively by adjusting the filler blending amount of the layer constituting more than 50% of the total thickness of the thermoplastic resin film.
  • a relatively thin filler can be contained in a thin layer.
  • Thin layer (preferably a layer constituting less than 30% of the total thickness of the thermoplastic resin film, more preferably a layer constituting less than 20% of the total thickness, further preferably less than 10% of the total thickness 5 to 75% by weight of filler can be included, but preferably 5 to 60% by weight, more preferably 5 to 45% by weight, and still more preferably 5 to 30% by weight. is there.
  • the thermoplastic resin film is composed of a plurality of layers, and the particle size and blending amount of the filler contained in the base material layer (A) constituting more than 50% of the total thickness are controlled within an appropriate range. Furthermore, by controlling the particle size and blending amount of the filler contained in the layer constituting less than 50% of the total thickness within an appropriate range, it is possible to form an appropriate amount of pores of appropriate sizes. Thus, the generation of wrinkles during processing can be more effectively suppressed while maintaining a high reflectance.
  • the base material layer (A) comprises a filler (preferably calcium carbonate) having an average particle diameter or an average dispersed particle diameter of 0.05 to 0.5 ⁇ m (preferably 0.1 to 0.4 ⁇ m) and titanium oxide. If it contains, the generation
  • additives such as a fluorescent brightening agent, a stabilizer (antioxidant), a light stabilizer, a dispersant, and a lubricant may be added to the thermoplastic resin film of the light reflector of the present invention.
  • a stabilizer 0.001 to 1% by weight of sterically hindered phenol, phosphorus, amine, etc.
  • the light stabilizer 0.001 to 1 of sterically hindered amine, benzotriazole, benzophenone, etc.
  • dispersant for the inorganic filler 0.01 to 4% by weight of a silane coupling agent, higher fatty acids such as oleic acid and stearic acid, metal soap, polyacrylic acid, polymethacrylic acid or salts thereof, etc. You may mix
  • thermoplastic resin constituting the thermoplastic resin film of the light reflector of the present invention is a propylene resin
  • a resin having a lower melting point than that of a propylene resin such as polyethylene or ethylene vinyl acetate is used in order to improve stretchability.
  • 2 to 25% by weight may be blended with respect to the whole thermoplastic resin film.
  • Such a low melting point resin is particularly preferably blended in a layer [for example, the base material layer (A)] constituting more than 50% of the total thickness of the thermoplastic resin film.
  • thermoplastic resin film When the thermoplastic resin film is composed of a plurality of layers, if a low melting point resin is blended in a layer constituting more than 50% of the total thickness of the thermoplastic resin film, the other layers have a low melting point resin. Even if is not blended, the stretchability of the entire thermoplastic resin film can be improved.
  • the blending amount of the low melting point resin in the layer constituting more than 50% of the total thickness of the thermoplastic resin film is preferably 3 to 25% by weight.
  • the thermoplastic resin film constituting the light reflector of the present invention may have a single layer structure or a multilayer structure.
  • a gloss adjusting layer, an intermediate layer, a protective layer and the like can be included in the case of a multilayer structure.
  • the thermoplastic resin film preferably has a multilayer structure including a gloss adjusting layer and an intermediate layer in addition to the base material layer. Moreover, you may have the structure where another layer was laminated
  • a structure in which a gloss adjustment layer is laminated on both sides of the base material layer a structure in which a gloss adjustment layer is laminated on one side of the base material layer, and an intermediate layer is laminated on the other side, or a base material layer and gloss
  • middle layer between the adjustment layers may be sufficient.
  • Gloss adjustment layer / base material layer As a preferable layer configuration of the light reflector of the present invention, Gloss adjustment layer / base material layer, Gloss adjustment layer / Base material layer / Gloss adjustment layer, Gloss adjustment layer / base material layer / intermediate layer, Gloss adjustment layer / intermediate layer / base material layer, Gloss adjustment layer / intermediate layer / base material layer / gloss adjustment layer, Examples thereof include a thermoplastic resin film having a structure such as a gloss adjusting layer / intermediate layer / base material layer / intermediate layer / gloss adjusting layer. Further, a protective layer can be further provided on the surface side of the gloss adjusting layer to prevent the gloss adjusting layer from being scratched or contaminated during molding or use.
  • the aspect of the laminated structure enumerated above represents the layer on the left side that is the light reflecting surface, and the right side represents the layer that is not the reflecting surface. That is, if the light reflector has a configuration of gloss adjusting layer / thermoplastic resin film / intermediate layer, it means that the surface of the gloss adjusting layer becomes a light reflecting surface.
  • the light reflector of the present invention preferably includes a gloss adjusting layer as a part of the thermoplastic resin film.
  • a gloss adjusting layer is an outermost layer of the light reflecting surface of the thermoplastic resin film, and imparts a function of diffusing reflected light to lower the glossiness.
  • the gloss adjusting layer has a thickness that constitutes the thermoplastic resin film. It contains more filler than a certain layer [for example, base material layer (A)], and forms many protrusions resulting from the filler on its surface.
  • the same resins as those mentioned for the thermoplastic resin film can be used.
  • inorganic or organic fillers such as silica, alumina, magnesium oxide, zinc oxide, precipitated calcium carbonate, titanium oxide, and acrylic resin as the filler in the gloss adjusting layer.
  • inorganic fillers or organic fillers may be used alone, or two or more kinds selected may be used in combination. When using combining 2 or more types, you may mix and use an organic filler and an inorganic filler.
  • the filler used in the gloss adjusting layer preferably has an average particle size and an average dispersed particle size of 0.05 to 10 ⁇ m.
  • the average particle size and the average dispersed particle size are preferably 1 to 7 ⁇ m, and more preferably 1 to 5 ⁇ m.
  • the average particle size and the average dispersed particle size are 0.05 ⁇ m or more, the light diffusion effect by the formed protrusions is obtained, and a predetermined glossiness tends to be easily obtained.
  • it is 10 micrometers or less, there exists a tendency which becomes easy to suppress generation
  • the total amount of filler in the gloss adjusting layer is preferably 10 to 85% by weight, more preferably 12 to 60% by weight, and still more preferably 15 to 45% by weight. If the blending amount is 10% by weight or more, the glossiness is prevented from becoming too high, and the desired glossiness tends not to be obtained. If it is 85 weight% or less, it will become easy to suppress generation
  • the thermoplastic resin film of the light reflector of the present invention may be provided with an intermediate layer for the purpose of imparting surface strength and protecting the film.
  • the same thermoplastic resin as that used for the thermoplastic resin film and the gloss adjusting layer can be used.
  • the intermediate layer may contain the filler, and the amount of the filler contained in the intermediate layer is usually 0 to 40% by weight, preferably 0 to 30% by weight, more preferably 0 to 20% by weight, The range is preferably 0 to 10% by weight.
  • the proportion of the thermoplastic resin in the intermediate layer is usually in the range of 60 to 100% by weight, preferably 70 to 100% by weight, more preferably 80 to 100% by weight, and particularly preferably 90 to 100% by weight.
  • the thickness of the thermoplastic resin film of the light reflector of the present invention is preferably 30 to 500 ⁇ m, more preferably 40 to 400 ⁇ m, and even more preferably 50 to 200 ⁇ m. If the thickness of the thermoplastic resin film is 30 ⁇ m or more, there is a tendency that it is easy to suppress a decrease in light reflectance due to a decrease in the number of reflective interfaces, and if it is 500 ⁇ m or less, the film and the metal plate are peeled off during drawing. It tends to be easy to suppress.
  • the gloss adjusting layer and the intermediate layer constituting this determine the thickness as a layer constituting less than 50% of the total thickness of the thermoplastic resin film.
  • the gloss adjusting layer preferably has a thickness of 1 to 20 ⁇ m, more preferably 2 to 15 ⁇ m, and even more preferably 2 to 6 ⁇ m. If the thickness of the gloss adjusting layer is 1 ⁇ m or more, it tends to suppress the falling off of the contained filler, and if it is 20 ⁇ m or less, the light reflectance by the thermoplastic resin film tends to be maintained high.
  • the thickness of the intermediate layer is preferably 1 ⁇ m or more, more preferably 2 to 30 ⁇ m, and even more preferably 3 to 20 ⁇ m. By setting the thickness to 1 ⁇ m or more, the surface strength of the light reflector is improved and suitability for drawing is improved.
  • the thickness of each layer in the thermoplastic resin film of the light reflector of the present invention is based on the total thickness of the thermoplastic resin film measured based on JIS-P-8118 and a cross-sectional photograph of the light reflector by a scanning electron microscope. It can be calculated from the thickness ratio of the observed individual layers.
  • the thermoplastic resin film of the light reflector of the present invention is preferably imparted with antistatic performance so as to avoid static electricity and dust.
  • the thermoplastic resin film preferably has a surface resistance value of 1 ⁇ 10 13 ⁇ or less in order to impart antistatic performance to the extent that it is not charged with static electricity.
  • the surface resistance value is more preferably 1 ⁇ 10 12 ⁇ or less, and further preferably 1 ⁇ 10 11 ⁇ or less. If the surface resistance value is 1 ⁇ 10 13 ⁇ or less, the film tends to be difficult to attract dust, and the light reflectance of the reflecting member tends to be prevented from being lowered during long-term use.
  • the imparting of antistatic performance to the thermoplastic resin film can be achieved, for example, by a method of coating an antistatic agent on the film surface or a method of adding an antistatic agent to the thermoplastic resin.
  • the antistatic agent include polyethylene glycol or derivatives thereof, quaternary ammonium salt type styrene polymer, quaternary ammonium salt type aminoalkyl acrylate polymer, quaternary ammonium salt type diallylamine polymer, sulfonate type styrene polymer, and the like. Is mentioned.
  • thermoplastic resin film of the light reflector of the present invention is obtained by melt-kneading the resin composition using an extruder, extruding the melt from the extruder into a sheet, and cooling the sheet on a cooling roll. It can be obtained by solidification.
  • a multilayer T die or I die can be used to co-extrude the melt, and the sheet can be cooled on a cooling roll and solidified. .
  • stretching the obtained resin sheet is mentioned.
  • thermoplastic resin film when the thermoplastic resin film is a stretched film having a multilayer structure, it may be stretched after lamination, but after the stretching of the thermoplastic resin film is finished, the molten raw material for the gloss adjusting layer or the protective layer is extruded and pasted, A method of further stretching and producing this laminate is also mentioned.
  • the gloss adjusting layer and the intermediate layer are obtained by once obtaining the thermoplastic resin film, and then forming the gloss adjusting layer and the intermediate layer in a sheet form directly or via an easy adhesion layer.
  • the method of extruding and sticking to a thermoplastic resin film is also mentioned.
  • thermoplastic resin film of the light reflector of the present invention is preferably stretch-molded in order to form pores with an appropriate rate inside.
  • Various known methods can be employed as a method for producing the thermoplastic resin film by stretching the resin sheet. It can carry out within the well-known temperature range suitable for the thermoplastic resin below the melting point of a crystal part from the glass transition point temperature or more of the thermoplastic resin mainly used for a thermoplastic resin film.
  • the thermoplastic resin of the thermoplastic resin film is a propylene homopolymer (melting point 155 to 167 ° C.), it is 100 to 166 ° C.
  • thermoplastic resin is high density polyethylene (melting point 121 to 136 ° C.)
  • it is 70 to 135 ° C.
  • the temperature is 1 to 70 ° C. lower than the melting point.
  • inter-roll stretching is performed by utilizing the peripheral speed difference of the roll group in the transport direction of the resin sheet, and a tenter oven is used in the direction (width direction) orthogonal to the transport direction of the resin sheet.
  • clip stretching that stretches and inflation molding using a tubular method can be used.
  • the area stretch ratio of the thermoplastic resin film is preferably in the range of 1.3 to 80 times, more preferably in the range of 7 to 70 times, particularly Preferably they are 22 times to 65 times, and most preferably 25 times to 60 times. If the area stretch ratio is in the range of 1.3 to 80 times, fine pores are easily obtained, and it is easy to suppress a decrease in light reflectance.
  • area stretch ratio is a magnification represented by longitudinal stretch ratio x lateral stretch ratio.
  • the preferable area stretch ratio of the gloss adjusting layer and the protective layer is the same as the preferable area stretch ratio of the thermoplastic resin film.
  • the obtained stretched resin film can be subjected to heat treatment (annealing treatment) as necessary to promote crystallization, reduce the thermal shrinkage rate of the laminated film, and the like.
  • edge part of the laminated body obtained as needed can be slit, and it can be set as a thermoplastic resin film.
  • the metal plate used in the light reflector of the present invention includes metals such as iron, aluminum, copper, zinc, tin, nickel, and titanium, and steel, stainless steel, and aluminum alloy mainly composed of one or more of these metals. And a plate made of an alloy such as brass. Among these, an iron plate and a steel plate are preferable. Further, the surface of these metal plates may be plated with zinc plating or the like, and a galvanized steel plate is particularly preferable.
  • the thickness of the metal plate is preferably 0.05 to 1 mm, and more preferably 0.1 to 0.6 mm. Within the same range, it is possible to obtain a light reflecting member that hardly causes problems in terms of strength, weight, and drawability.
  • ⁇ Method for producing light reflector> As a method of obtaining the light reflector of the present invention by laminating the above thermoplastic resin film and the above metal plate, a method of bonding via an adhesive, a method of bonding via an adhesive sheet, an extruded molten resin sheet And a method of heating one (usually a metal plate) and directly heat-sealing the other (usually a thermoplastic resin film).
  • a double-sided pressure-sensitive adhesive sheet is laminated on the non-light reflecting surface of a thermoplastic resin film so that one of the pressure-sensitive adhesive surfaces is in contact, and then the other pressure-sensitive adhesive surface of the double-sided pressure-sensitive adhesive sheet is laminated so as to be in contact with a metal plate.
  • the light reflector can be obtained by pressure bonding.
  • a method of applying a polyurethane-based, polyester-based, or epoxy-based adhesive on the surface of the thermoplastic resin film or metal plate to be bonded and bonding them together to obtain a light reflector may be used.
  • the adhesive liquid is applied to the surface on the metal plate side so that the film thickness after drying is 1 to 5 ⁇ m, and then dried with hot air After drying the adhesive with a machine or the like, the light reflecting body can be obtained by laminating and bonding the non-light reflecting surface of the thermoplastic resin film so that the adhesive is in contact with each other, and press-bonding.
  • the light reflector of the present invention can be effectively used for a housing such as a lighting device by applying a bending process or a drawing process to form a three-dimensional light reflection member.
  • the light reflector of the present invention is characterized in that the thermoplastic resin film portion is less likely to be wrinkled by the deformation during the processing.
  • compositions (A) and the composition (B) in which the materials described in Table 1 were mixed at the mixing ratios described in Table 2 were melt-kneaded at 250 ° C. using two separate extruders. After that, by supplying to one co-pressing die and laminating (B) on one side of (A) in the die, extruding it into a sheet and cooling it to about 60 ° C. with a cooling roll (B) A laminate of / (A) was obtained. The laminate was reheated to 145 ° C., stretched in the longitudinal direction using the peripheral speed difference of a large number of roll groups, reheated to about 150 ° C., and stretched in the lateral direction using a tenter.
  • a composition (A) obtained by mixing the materials shown in Table 1 at the blending ratio shown in Table 2 was melt-kneaded at 250 ° C. using an extruder. Thereafter, this was extruded into a sheet and cooled to about 60 ° C. with a cooling roll to obtain a thermoplastic resin sheet. This thermoplastic resin sheet was reheated to 145 ° C., and then stretched in the longitudinal direction at the magnifications shown in Table 2 utilizing the peripheral speed differences of a large number of roll groups. Next, the composition (B) and the composition (C) obtained by mixing the materials shown in Table 1 at the blending ratio shown in Table 2 were melt-kneaded at 250 ° C.
  • the laminate having the composition of the order of (B) / (C) / (A) / (C) was obtained by melt-extrusion on both surfaces of the thermoplastic resin sheet obtained in (1).
  • this laminate was reheated to 160 ° C. and stretched in the transverse direction at a magnification described in Table 2 using a tenter. Then, after annealing at 160 ° C., it was cooled to 60 ° C., and the ears were slit to obtain a laminated film having a four-layer structure having the thickness described in Table 2.
  • the laminated film is subjected to corona discharge treatment on the front and back, and an aqueous solution containing 0.5% by weight of an antistatic agent (trade name: Saftmer ST-3200, manufactured by Mitsubishi Chemical Corporation) as a solid content has a solid content after drying. It was coated so as to be 0.01 g per 1 m 2 and dried to obtain a thermoplastic resin film.
  • an antistatic agent trade name: Saftmer ST-3200, manufactured by Mitsubishi Chemical Corporation
  • composition (A) obtained by mixing the materials shown in Table 1 at a blending ratio shown in Table 2 was melt-kneaded at 250 ° C. using an extruder. Thereafter, this was extruded into a sheet and cooled to about 60 ° C. with a cooling roll to obtain a thermoplastic resin sheet. This thermoplastic resin sheet was reheated to 145 ° C., and then stretched in the longitudinal direction at the magnifications described in Table 2 by utilizing the peripheral speed differences of a large number of roll groups.
  • the composition (B) and the composition (C) obtained by mixing the materials shown in Table 1 at the blending ratio shown in Table 2 were melt-kneaded at 250 ° C.
  • thermoplastic resin sheet obtained in (1) was melt-extruded on both surfaces to obtain a laminate having a composition in the order of (B) / (A) / (C). Subsequently, this laminate was reheated to 160 ° C. and stretched in the transverse direction at a magnification described in Table 2 using a tenter. Then, after annealing at 160 ° C., it was cooled to 60 ° C., and the ears were slit to obtain a laminated film having a three-layer structure having the thickness shown in Table 2.
  • Corona discharge treatment is applied to the front and back of this laminated film, and an aqueous solution containing 0.5% by weight of an antistatic agent (trade name: Saftmer ST-3200, manufactured by Mitsubishi Chemical Corporation) as a solid content has a solid content after drying. It was coated so as to be 0.01 g per 1 m 2 and dried to obtain a thermoplastic resin film.
  • an antistatic agent trade name: Saftmer ST-3200, manufactured by Mitsubishi Chemical Corporation
  • thermoplastic resin sheet obtained by mixing the materials shown in Table 1 at a blending ratio shown in Table 2 was melt-kneaded at 250 ° C. using an extruder. Thereafter, this was extruded into a sheet and cooled to about 60 ° C. with a cooling roll to obtain a thermoplastic resin sheet. This thermoplastic resin sheet was reheated to 145 ° C., and then stretched 4.5 times in the longitudinal direction by utilizing the peripheral speed difference of many roll groups. Next, the composition (B) obtained by mixing the materials shown in Table 1 at the blending ratio shown in Table 2 was melt-kneaded at 250 ° C. using two extruders, and the thermoplastic resin sheet obtained above was mixed.
  • Examples 1 to 8, Comparative Examples 1 to 4 Non-light-reflective surface of thermoplastic resin film obtained in Production Examples 1-12 (Surface A of Production Examples 1-3, (C) Face of Production Examples 4-8 and 10-12, one of Production Examples 9) (B) Surface)
  • the adhesive transfer tape (trade name: F-9460PC, manufactured by Sumitomo 3M Co., Ltd.) was laminated on the entire surface so as to be in contact with each other, and pressure-bonded via a nip roll. Next, lamination was performed so that the other adhesive surface of the adhesive transfer tape was in contact with one side of a galvanized steel sheet (SGCC / 60/60) having a thickness of 0.4 mm, and further crimped via a nip roll.
  • the light reflectors of Examples 1 to 8 and Comparative Examples 1 to 4 having the structures described above were obtained.
  • thermoplastic resin films obtained in Production Examples 1 to 12 or the light reflectors of Examples 1 to 8 and Comparative Examples 1 to 4, the following measurements and tests were performed.
  • Total thickness of thermoplastic resin film and thickness of each layer The total thickness of the thermoplastic resin film of each production example was measured based on JIS-P-8118. Separately, the section of the thermoplastic resin film of each production example was cut using a microtome, the cut surface was observed at 3000 times using a scanning electron microscope, and the thickness of each layer was calculated from the thickness ratio of each layer. In the calculation of the thickness of the gloss adjusting layer (B), the thickest part in the observation visual field was defined as the layer thickness.
  • thermoplastic resin film of each production example was sampled at 3 cm square, and the density was measured by an underwater substitution method at 23 ° C. using a high-precision electronic hydrometer (trade name: SD-200L, manufactured by Mirage Trading Co., Ltd.).
  • thermoplastic resin film ⁇ Light reflectance of thermoplastic resin film>
  • a spectrophotometer (trade name: U-3310, Inc.) equipped with an integrating sphere having a diameter of 150 mm was used to measure the light reflectance on the light reflecting surface side (gloss adjustment layer (B) side) surface of the thermoplastic resin film of each production example. ) Manufactured by Hitachi, Ltd.) and measured with light having a wavelength of 550 nm according to the method described in condition d of JIS-Z8722. The measurement result was calculated
  • thermoplastic resin film of each production example was adjusted for 2 hours in an environment of 20 ° C. and a relative humidity of 50%, and in that environment, according to the method described in JIS-K-6911 (the gloss adjusting layer (B) Side) The surface resistance value on the surface was measured.
  • thermoplastic resin film ⁇ Glossiness of thermoplastic resin film> According to the method described in Method 4 of JIS-Z-8741, the light reflection of the thermoplastic resin film of each production example using a digital variable glossiness meter (trade name: UGV-5DP, manufactured by Suga Test Instruments Co., Ltd.) The specular glossiness at an incident angle of 75 ° on the surface side (gloss adjustment layer (B) side) surface was measured and set to 75 ° glossiness.
  • UGV-5DP digital variable glossiness meter
  • each of the examples was obtained using an autograph (trade name: AGSD, manufactured by Shimadzu Corporation) and the attached three-point bending test jig for metal.
  • a test piece having a width of 100 mm collected from the light reflector of the comparative example was bent at a 90 ° angle to the light reflecting surface side and the non-light reflecting surface side, and wrinkles generated on the thermoplastic resin film side surface of the bent portion. The width of was observed with a stereomicroscope, and the quality was judged according to the following criteria.
  • FIG. 2 shows photographs taken of the wrinkle occurrence situation of Example 5 and Comparative Example 2. Wrinkles are observed in the region between the a line and the b line in the photograph of Comparative Example 2 in FIG. 2, and the width of the wrinkle is obtained by measuring the distance between ab. In Example 5 of FIG. 2, no wrinkles were observed (the width of the wrinkles was zero).
  • Tables 2 and 3 These test results are shown in Tables 2 and 3.
  • the number described in the column of the composition of each layer indicates the content (% by weight) of each material contained in each layer, and the English letters in parentheses indicate the material contained in each layer. Indicates the type (see Table 1).
  • the light reflectors of Examples 1 to 8 of the present invention are all excellent in that wrinkles during processing are suppressed while achieving high reflectivity, preferable glossiness and surface resistance.
  • the light reflectors of Comparative Examples 1 to 4 have insufficient characteristics in at least one or more items of reflectance, glossiness, surface resistance, and wrinkling during processing.
  • the light reflector (Comparative Example 3) using the thermoplastic resin film of Production Example 11 that reproduces the example of Japanese Patent Application Laid-Open No. 2004-167820 has a large generation of wrinkles during processing. Since the reflectance of the light reflector (Comparative Example 4) which has been improved by reducing the porosity is lowered, it is difficult to manufacture the light reflector of the present invention with the prior art.
  • each light reflector of Examples 1 to 8 Using each light reflector of Examples 1 to 8, a fluorescent lamp housing was prepared, and the fluorescent lamp was mounted and used for room lighting for one year.
  • the reflectivity of each light reflector after use shows almost no decrease in the visible light region including 550 nm (confirmed at 420 to 740 nm) and brightness compared to the unused ones in each example used as a reference. The sustainability of was confirmed. In addition, luminance unevenness and discoloration were not observed.
  • the illuminated signboard and the surface light source device manufactured using the light reflectors of Examples 1 to 8 are excellent in the effect of sustaining brightness, uneven brightness, and suppressing discoloration.
  • the generation of wrinkles during processing does not cause a substantial problem. For this reason, the optical characteristics of the thermoplastic resin film can be maintained even after processing. For this reason, the light reflector of the present invention can also be applied to shaping a reflecting member having a complicated shape such as LED lighting. Further, since the light reflector of the present invention has a low glossiness, the reflected light has little glare and can be suitably used for a lighting device or the like. Further, since the light reflector of the present invention has a high light reflectance, it is possible to improve illumination efficiency and contribute to energy saving. In addition, since dust hardly adheres to the light reflecting surface and the light reflectance is hardly lowered due to dirt, it is difficult to lower the illumination efficiency and can be used for a long time.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un corps réfléchissant la lumière possédant une structure dans laquelle un film de résine thermoplastique (1) est stratifié sur au moins une surface d'une plaque métallique (2), lequel corps réfléchissant la lumière est caractérisé en ce que la réflectance de la lumière d'une surface réfléchissant la lumière est de 95-100%, le degré de brillant de la surface réfléchissant la lumière est de 0-60%, le film de résine thermoplastique contient une matière de charge, et la porosité du film de résine thermoplastique correspondant à la formule (1) (où ρ 0 est la densité réelle ρ est la densité) est de 5-25%. Ce corps réfléchissant la lumière peut supprimer la formation de rides dans la surface réfléchissante lors du processus d'étirage. AA POROSITE (%)
PCT/JP2011/068426 2010-08-12 2011-08-12 Corps réfléchissant la lumière, dispositif d'éclairage, panneau illumine, et dispositif à source de lumière de surface WO2012020837A1 (fr)

Priority Applications (2)

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KR1020137006228A KR20130108290A (ko) 2010-08-12 2011-08-12 광반사체, 조명 기구, 전식 간판 및 면광원 장치
CN2011800495649A CN103154783A (zh) 2010-08-12 2011-08-12 光反射体、照明器具、灯饰看板以及面光源装置

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JP2010180878 2010-08-12
JP2010-180878 2010-08-12

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JP6319853B2 (ja) * 2015-05-21 2018-05-09 小泉製麻株式会社 表面突起を有する反射シート及びその製造方法並びに表面突起を有する防虫ネット用モノフィラメント及び防虫ネット

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JP2006139201A (ja) * 2004-11-15 2006-06-01 Mitsubishi Plastics Ind Ltd 脂肪族ポリエステル系樹脂反射フィルム及び反射板
JP2006145569A (ja) * 2004-11-16 2006-06-08 Mitsubishi Plastics Ind Ltd 脂肪族ポリエステル系樹脂反射フィルム及び反射板
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JP4049659B2 (ja) * 2002-11-20 2008-02-20 株式会社ユポ・コーポレーション 光反射体
JP2007112121A (ja) * 2005-09-20 2007-05-10 Toray Ind Inc 面光源反射部材用フィルム
JP5086606B2 (ja) * 2005-10-31 2012-11-28 株式会社ユポ・コーポレーション 光反射体ならびにそれを用いた面光源装置及び照明装置
EP1964669B1 (fr) * 2005-12-22 2012-09-26 Mitsubishi Plastics, Inc. Film reflechissant
CN100498460C (zh) * 2006-12-25 2009-06-10 长兴光学材料（苏州）有限公司 抗刮光学膜及其用途
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JP2008203877A (ja) * 2001-08-06 2008-09-04 Yupo Corp 光反射体
JP2006139201A (ja) * 2004-11-15 2006-06-01 Mitsubishi Plastics Ind Ltd 脂肪族ポリエステル系樹脂反射フィルム及び反射板
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