WO2005114267A1 - 遮光性高反射積層シート及びそれを用いてなる熱成形体及び筐体 - Google Patents
遮光性高反射積層シート及びそれを用いてなる熱成形体及び筐体 Download PDFInfo
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- WO2005114267A1 WO2005114267A1 PCT/JP2005/009226 JP2005009226W WO2005114267A1 WO 2005114267 A1 WO2005114267 A1 WO 2005114267A1 JP 2005009226 W JP2005009226 W JP 2005009226W WO 2005114267 A1 WO2005114267 A1 WO 2005114267A1
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- light
- layer
- reflection
- shielding
- sheet
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
- G02B5/085—Multilayer mirrors, i.e. having two or more reflecting layers at least one of the reflecting layers comprising metal
- G02B5/0858—Multilayer mirrors, i.e. having two or more reflecting layers at least one of the reflecting layers comprising metal the reflecting layers comprising a single metallic layer with one or more dielectric layers
- G02B5/0866—Multilayer mirrors, i.e. having two or more reflecting layers at least one of the reflecting layers comprising metal the reflecting layers comprising a single metallic layer with one or more dielectric layers incorporating one or more organic, e.g. polymeric layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
- G02B5/0825—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only
- G02B5/0841—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only comprising organic materials, e.g. polymers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
Definitions
- the present invention relates to a light-shielding high-reflection laminated sheet, a thermoformed body and a housing using the same.
- the present invention relates to a light-shielding high-reflection laminated sheet, a matured molded body and a housing thereof, and more particularly, to a reflector for a liquid crystal backlight, a lighting device, a fluorescent tube used in a house or various facilities, and an LED.
- the present invention relates to a light-shielding high-reflection laminated sheet suitable for use in light source parts such as (light-emitting diodes), EL (electo-luminescence), plasma, laser, and the like, and a molded article and a housing using the same.
- the liquid crystal display itself emits no light.
- the light source is an edge-light type that uses a light source next to the liquid crystal display and a light guide plate for small LCD TVs, liquid crystal computer monitors, and notebook computers less than 20 inches (51 cm).
- the backlight is a direct-type backlight in which multiple fluorescent lamps (cold-cathode tubes) are arranged directly below the liquid crystal screen of a large LCD display (TV, PC monitor) of 20 inches (51 cm) or more. Demand for such components is increasing.
- Each backlight uses a fluorescent tube as a light source, and a reflective film is used to efficiently send the light to the liquid crystal unit.
- a foamed polyethylene terephthalate (PET) film or the like is drawn under the light guide plate, and as a reflector for a direct type LCD backlight, a laminated product of a foamed PET film or a foamed polypropylene (PP) film and an A1 plate, And supercritical foamed PET sheets.
- PP foamed polypropylene
- PC resin polycarbonate resin
- Many techniques for reflectors injection molded products have been proposed.
- the advantage of PC resin thermoformed reflectors over current PET film ZA1 board bending products is that resin is easier to shape design than metal processing, reflects optical design more easily, and is lighter. In And that the processing cost is advantageous.
- a reflector In a direct-type liquid crystal backlight, a reflector is used in close proximity to a plurality of light sources (cold-cathode tubes), so that light resistance to the wavelength of the light source is required.
- the cold cathode fluorescent lamp emits ultraviolet light having a wavelength of 200 to 400 nm in addition to light in the visible region used as a liquid crystal light source, and this ultraviolet light promotes light deterioration of the reflecting member.
- the resin that forms the reflector turns yellow with light degradation, and the reflection characteristics of the reflector deteriorate. Therefore, for a white PET film, a kneaded light stabilizer for imparting light resistance and a coating technique have been proposed (for example, see Patent Documents 1 to 3).
- the edge-type backlight is composed of multiple members such as a lamp house that houses the light guide plate, a reflective film, a frame that holds the light guide plate, and light-shielding tape, which simplifies the assembly process and component management and reduces costs. It has been demanded.
- An important main characteristic of an edge-type backlight unit is the light-shielding property as well as the luminance. If the light-shielding property is insufficient for LCD monitors, light bleeds at the edges of the screen. Conventionally, in order to prevent this light from being transmitted, a metal lamp house has been used, or a light-shielding tape has been affixed to each required portion of the unit.
- the thinning of BLU is also proceeding at the same time, and the housing, frame, and reflector of these products have high reflectivity and sufficient light-shielding properties even with a thin wall. It is required to do.
- a sheet with a small thickness has a force S, which is excellent in processability such as bending, and has a problem in light transmission because light is easily transmitted and a light-shielding property is improved by increasing the thickness, but workability is impaired. there were.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-228313
- Patent Document 2 JP 2002-40214
- Patent Document 3 Japanese Patent Application Laid-Open No. 2002-90515
- the present invention has been made in view of the above circumstances, and has a light-shielding high-reflection laminated sheet having high reflectance and light-shielding properties (ie, low ⁇ total light transmittance), a mature molded article and a casing using the same. It is an object of the present invention to provide a light-shielding high-reflection laminated sheet particularly suitable for a modular unit of a backlight unit, a mature molded body and a housing using the same.
- the present inventors have found that the total light reflectance (Y value) of the surface of the first layer of the multilayer sheet of at least two layers is not less than a specific value, and the opposite side of the first layer of the multilayer sheet.
- the present inventors have found that the object can be achieved by setting the total light transmittance (Y value) of the outermost layer surface to a specific value or less and the total light transmittance of the laminated sheet to a specific value or less.
- the invention has been completed.
- the total light reflectivity (Y value) of the second layer is 80% or more (1) to (3).
- At least one layer after the second layer is composed of a recycled material of the first layer or a recycled material of the multilayer high-reflection sheet according to any of (1) to (4) above.
- the light-shielding high-reflection laminated sheet described in the above (9) is assembled using the folded hinge portion thereof, and is combined with the light-shielding high-reflection laminated sheet and another thermoplastic resin molded article or the same.
- FIG. 1 is a schematic view of a cross section of a light-shielding reflective laminated sheet showing an embodiment of the present invention.
- the light-shielding high-reflection laminated sheet of the present invention is a multilayer sheet having at least two layers, the total light reflectance (Y value) of the surface of the first layer is 96% or more, and the opposite side of the multilayer sheet first layer. Most The total light reflectance (Y value) of the outer layer surface is 30% or less, and the total light transmittance of the laminated sheet is less than 0.3%.
- the total light reflectance ( ⁇ value) of the first layer surface of the light-shielding high-reflection laminated sheet of the present invention needs to be 96% or more. It is preferably at least 97%, more preferably at least 98%.
- ⁇ value the total light reflectance of the first layer surface of the light-shielding high-reflection laminated sheet of the present invention
- the total light reflectance ( ⁇ value) of the outermost layer surface on the side opposite to the first layer needs to be 30% or less. It is preferably at most 20%, more preferably at most 10%. Further, the total light transmittance of the light-shielding high-reflection laminated sheet must be 0.3% or less. It is preferably at most 0.2%, more preferably at most 0.1%. Such a sheet excellent in low reflectance and light shielding property can be achieved by adjusting a light shielding coating layer described later.
- the light reflectance is less than 96% or the light transmittance is 0.3% or more, it is difficult to obtain sufficient luminance for the intended reflection use.
- the thickness of the light-shielding high-reflection laminated sheet is preferably 0.2 to 2 mm, more preferably 0.3 to 1.8 mm, and still more preferably 0.4 to 1.5 mm. If the thickness of the sheet is less than 0.2 mm, drawdown occurs when thermoforming a large-area reflecting plate, and it is difficult to suppress uneven thickness, and uneven light reflection in the surface is likely to occur. If it exceeds 2 mm, a temperature difference between the surface on one side, the inside, and the surface on the opposite side is likely to occur during heating during thermoforming, and as a result, a thermoformed product having uniform reflection characteristics is difficult to obtain.
- the reflective layer of the light-shielding high-reflection laminated sheet of the present invention is preferably a polycarbonate resin composition containing a polycarbonate-based polymer and titanium oxide, which is also preferably used.
- a white film which is a thermoplastic film such as polyester, polyolefin, polyamide, polyurethane, and polyolefin sulfide is preferably used.
- the polycarbonate-based polymer is preferably a mixture of a polycarbonate polyorganosiloxane copolymer and a polycarbonate resin (hereinafter sometimes referred to as a polycarbonate-based polymer mixture).
- Polycarbonate Polyorganosiloxane copolymer There are various types of polymers (hereinafter sometimes abbreviated as PC-POS copolymers), but the following general formula (1) is preferable.
- R1 and R2 are each a nitrogen atom (for example, chlorine, fluorine, iodine) or an alkyl group having 1 to 8 carbon atoms (for example, a methyl group, an ethyl group, a propyl group, an isopropyl group) Butyl groups (n-butyl group, isobutyl group, sec-butyl group, tert-butyl group), various pentyl groups, various hexyl groups, various heptyl groups, various octyl groups).
- nitrogen atom for example, chlorine, fluorine, iodine
- alkyl group having 1 to 8 carbon atoms for example, a methyl group, an ethyl group, a propyl group, an isopropyl group
- Butyl groups n-butyl group, isobutyl group, sec-butyl group, tert-butyl group
- various pentyl groups various hex
- n and n are each an integer of 0 to 4; when m is 2 to 4, R1 may be the same or different; when n is 2 to 4, R2 is the same; Or may be different.
- Z represents an alkylene group having 1 to 8 carbon atoms or an alkylidene group having 2 to 8 carbon atoms (for example, methylene group, ethylene group, propylene group, butylene group, pentylene group, hexylene group, ethylidene group, isopropylidene group)
- a cycloalkylidene group having 5 to 15 carbon atoms or a cycloalkylidene group having 5 to 15 carbon atoms for example, a cyclopentylene group, a cyclohexylene group, a cyclopentylidene group, a cyclohexylidene group, etc.
- Single bond —S02 —, —SO—, —S—, —O—,
- R 3, R 4 and R 5 are each a hydrogen atom, an alkyl group having 1 to 5 carbon atoms (eg, a methyl group, an ethyl group, a propyl group, a n-butyl group, an isobutyl group, etc.) or a phenyl group;
- p and q are each an integer of 0 or 1 or more. The sum of the forces p and q is an integer of 1 or more.
- the degree of polymerization of the polycarbonate portion is preferably 3 to: LOO force
- the degree of polymerization of the polyorganosiloxane portion is preferably 2 to 500 force S.
- the PC-POS copolymer has a polycarbonate moiety having a repeating unit represented by the general formula (1) and a polyorganosiloxane having a repeating unit represented by the general formula (3). And a block copolymer having a viscosity average molecular weight of preferably 10,000 to 40,000, more preferably 12,000 to 35,000.
- a PC-POS copolymer includes, for example, a polycarbonate oligomer (hereinafter abbreviated as a PC oligomer) constituting a polycarbonate portion prepared in advance and a reactive group at a terminal constituting a polyorganosiloxane portion.
- a polyorganosiloxane eg, polydimethylsiloxane (PDMS), polydialkylsiloxane such as polydimethylsiloxane, or polymethylsiloxane
- a solvent such as methylene chloride, chloroform, benzene, or chloroform.
- the compound can be produced by adding an aqueous solution of bisphenol sodium hydroxide and dissolving it, and performing an interfacial polycondensation reaction using triethylamine or trimethylbenzylammonium chloride as a catalyst.
- a PC-POS copolymer produced by the method described in Japanese Patent Publication No. 44-30105 and the method described in Japanese Patent Publication No. 45-20510 can also be used.
- the PC oligomer having a repeating unit represented by the general formula (1) is In the presence of a known acid acceptor and molecular weight regulator in a solvent such as methylene chloride, the following general formula (4)
- a divalent phenol represented by the following formula can be easily produced by reacting a divalent phenol represented by the following formula with a carbonate precursor such as phosgene. That is, for example, it can be produced by reacting a divalent phenol with a carbonate precursor such as phosgene in a solvent such as methylene chloride in the presence of a known acid acceptor or molecular weight regulator. Further, it can be produced by a transesterification reaction between a divalent phenol and a carbonate precursor such as a carbonated ester conjugate.
- divalent phenol represented by the general formula (4) various ones can be mentioned.
- 2,2 bis (4-hydroxyphenyl) propane [commonly known as bisphenol A] is preferred.
- Bivalent phenols other than bisphenol A include, for example, bis (4-hydroxyphenyl) methane; 1,1-bis (4hydroxyphenyl) ethane; 1,2 bis (4hydroxyphenyl) ethane, etc.
- examples of the divalent phenol include hydroquinone. These divalent phenols may be used alone or in combination of two or more.
- Examples of the carbonate compound include diaryl carbonate such as diphenyl carbonate, and dialkyl carbonate such as dimethyl carbonate and getyl carbonate.
- a molecular weight regulator can be used as necessary.
- the molecular weight regulator is not particularly limited, and those conventionally used in the production of polycarbonate can be used.
- Such compounds include, for example, phenol, p-cresol, p-tert-butynolephenol, p-tert-octynolephenol, p-tamylphenol, ⁇ -norphenol, p-phenol —Examples include monovalent phenols such as dodecylphenol.
- the PC oligomer used for the production of the PC-POS copolymer may be a homopolymer using the above-mentioned divalent phenol- species or a copolymer using two or more types. There may be. Further, it may be a thermoplastic random branched polycarbonate obtained by using a polyfunctional aromatic compound in combination with the above divalent phenol.
- the content of polyorganosiloxane in the copolymer should be 10% by mass or less, and
- the copolymerization is carried out using at least 100 repeating units represented by the general formula (3) and using at least 5.3 X 10-3 mol Z (kg. Oligomer) of a catalyst such as tertiary amine. It is preferred to do so.
- the polycarbonate resin constituting the polycarbonate resin composition used in the present invention can be easily produced by, for example, reacting a divalent phenol with phosgene or a carbonate ester conjugate. That is, for example, in a solvent such as methylene chloride, in the presence of a known acid acceptor or molecular weight regulator, by the reaction of divalent phenol with a carbonate precursor such as phosgene, or in the presence or absence of a solvent, It can be produced by a transesterification reaction between a divalent phenol and a carbonate precursor such as a carbonate ester conjugate.
- the divalent phenol may be the same as or different from the compound represented by the above general formula (4).
- carbonated ester conjugate and the molecular weight regulator those similar to the above can be used.
- the polycarbonate resin may be a homopolymer using one of the above-mentioned divalent phenols or a copolymer using two or more of the above-mentioned divalent phenols. Furthermore, a thermoplastic random branched polycarbonate obtained by using a polyfunctional aromatic compound in combination with the above divalent phenol. It may be a nate resin.
- the polyfunctional aromatic compound is generally called a branching agent, and specifically, 1,1,1,1-tris (4-hydroxyphenyl) ethane, at, (X ,, ⁇ "-tris (4— Hydroxyphenyl) 1, 3,5-triisopropylbenzene, 1- [ ⁇ -methyl-1- ⁇ - (4,1-hydroxyphenyl) ethyl] -4- [ ⁇ ', a'-bis (4 " —Hydroxyphenyl) ethyl] benzene, phloroglucin, trimellitic acid, isatin bis (o-cresol) and the like.
- This polycarbonate resin has mechanical strength, especially Izod impact strength and moldability / ⁇ , force, viscosity average molecular weight force in the range of 13,000 to 30,000, and especially 15,000 to 25,000. Those in the range of 000 are preferred.
- the viscosity average molecular weight (Mv) was determined by measuring the viscosity of a methylene chloride solution at 20 ° C. using a Bellode-type viscometer, and calculating the intrinsic viscosity [7?] From this. 23 X 10—5MvO. It is a value calculated by the formula of 83.
- Polycarbonate resins having such properties are commercially available as, for example, aromatic polycarbonate resins such as Teflon FN3000A, FN2 500A, FN2200A, FN1900A, FN1700A, FN1500A (trade name, manufactured by Idemitsu Petroleum Inc.). .
- the proportion of PC-POS in the polycarbonate-based polymer mixture is 5 to 85 parts by weight, preferably 10 to 58 parts by weight, based on 100 parts by weight of each component of the polycarbonate-based polymer mixture + titanium oxide.
- the mass ratio of the polycarbonate resin is from 0 to 80 parts by mass, and preferably from 10 to 75 parts by mass. If the PC-POS is less than 5 parts by mass, the dispersibility of the polyorganosiloxane will be poor, and sufficient flame retardancy will not be obtained. On the other hand, PC-POS and polycarbonate resin are preferred, and those having good flame retardancy can be obtained in the range.
- the content of the polyorganosiloxane moiety in the PC-POS may be appropriately selected according to the level of flame retardancy required for the final resin composition.
- the “polyorganosiloxane” does not include or exclude the polyorganosiloxane component contained in the later-described organosiloxane.
- the titanium oxide used for the reflective layer of the light-shielding high-reflection laminated sheet of the present invention is finely divided from the purpose of imparting high reflectivity and low transparency, that is, high light-shielding properties to the polycarbonate-based polymer mixture.
- fine powder of oxidized titanium of various particle sizes can also be produced by a shift method such as a chlorine method or a sulfuric acid method.
- the titanium oxide used in the present invention may be either a rutile type or an anatase type, but is preferably a rutile type in terms of thermal stability and weather resistance.
- the shape of the fine powder particles is not particularly limited, and can be appropriately selected and used, such as a flaky shape, a spherical shape, and an irregular shape.
- the titanium oxide is surface-treated with an amide compound, a polyvinylidene compound, or the like, in addition to a hydrous acid chloride of aluminum and / or silicon.
- This treatment improves the uniform dispersibility in the polycarbonate resin composition and the stability of the dispersed state, and also improves the affinity with the added flame retardant to produce a uniform composition.
- Examples of the water-containing oxidized product, the amine-based product, and the poly-iodine product of aluminum and silicon include hydrated alumina, hydrated silica, triethanolamine, and trimethylolethane. Can be.
- the treatment method itself in the above-mentioned surface treatment is not particularly limited, and any method may be appropriately adopted.
- the amount of the surface treatment agent applied to the surface of the titanium oxide particles by this treatment is not particularly limited, but may be determined in consideration of the light reflectivity of titanium oxide and the moldability of the polycarbonate resin composition. 0.1 to 0.5% by mass of LO.
- the particle diameter of the titanium oxide powder is not particularly limited, but a particle having an average particle diameter of about 0.1 to 0.5 / zm is preferable in order to exhibit the above effects efficiently.
- the mixing amount of titanium oxide in the polycarbonate resin composition according to the present invention is 8 to 50 parts by mass, preferably 15 parts by mass, based on 100 parts by mass of each of the components of the polycarbonate-based polymer mixture and titanium oxide. 4040 parts by mass. If the amount is less than 8 parts by mass, the light-shielding property is insufficient, and the light reflectance is undesirably increased.
- the compounding amount exceeds 50 parts by mass, pelletizing by kneading and extrusion becomes difficult, molding of resin becomes difficult, and occurrence of silver in the molded product tends to increase.
- the blending amount of titanium oxide is more preferably 20 to 35 parts by mass.
- the surface acid amount of the titanium oxide used in the present invention is preferably 10 ⁇ mol Zg or more, and the surface base amount is preferably 10 ⁇ mol Zg or more.
- the surface acid amount is smaller than 10 micromol Zg or the surface base amount is smaller than 10 micromol Zg, the reactivity with the organosiloxane conjugate as a stabilizer becomes low, so that the dispersion of titanium oxide is reduced. May be insufficient, and the increase in brightness of the molded article may be insufficient.
- the surface acid amount of titanium oxide is more preferably 15 ⁇ mol Zg or more, further preferably 16 ⁇ mol Zg or more, and the surface base amount is more preferably 20 ⁇ mol Zg or more, further preferably 25 ⁇ mol Zg or more. .
- PTFE polytetrafluoroethylene having a fibril-forming ability
- the average molecular weight of PTFE is preferably 500,000 or more, more preferably 500,000 to 100,000,000,000, and even more preferably ⁇ 1,000,000 to 100,000,000,000.
- PTFE is preferably from 0 to 1.0 part by mass, more preferably from 0.1 to 0.5 part by mass, per 100 parts by mass of the total of the positive carbonate-based polymer mixture and titanium oxide. If this amount exceeds 1.0 parts by mass
- the discharge of the strand may be pulsated during kneading and extruding, which not only adversely affects the impact resistance and the appearance of the molded product, but may not be able to produce a stable pellet.
- a suitable effect of preventing dripping of the melt is obtained, and an excellent flame retardant product is obtained.
- Polytetrafluoroethylene (PTFE) having a fibril-forming ability is not particularly limited, and for example, those classified into Type 3 according to ASTM standards can be used. Specific examples of this type include Teflon 6-J (trade name of Mitsui 'Dupont Fluorochemicals), Polyflon D-1 and Polyflon F-103 (trade name of Daikin Industries, Ltd.). ). In addition to Type 3, examples include Argoflon F5 (trade name, manufactured by Montefluos) and Polyflon MPA FA-100 (trade name, manufactured by Daikin Industries, Ltd.). These PTFEs may be used in combination of two or more.
- PTFE having a fibril-forming ability as described above is, for example, tetrafluoroethylene.
- aqueous solvent in the presence of sodium, potassium or ammodimoxy disulfide under a pressure of 0.007 to 0.7 MPa and a temperature of 0 to 200.
- C preferred ⁇ 20-100. . It can be obtained by superposition.
- the polycarbonate resin composition according to the present invention may be formulated with an organosiloxane, which is capable of preventing deterioration of the resin and maintaining properties of the resin such as mechanical strength, stability, and heat resistance.
- organosiloxane which is capable of preventing deterioration of the resin and maintaining properties of the resin such as mechanical strength, stability, and heat resistance.
- Specific examples include alkyl hydrogen silicone and alkoxy silicone.
- alkyl hydrogen silicone examples include methyl hydrogen silicone and ethyl hydrogen silicone.
- alkoxysilicone examples include methoxysilicone, ethoxysilicone, and the like.
- Particularly preferred alkoxysilicone is a silicone compound containing an alkoxysilyl group in which an alkoxy group is bonded to a silicon atom directly or via a divalent hydrocarbon group, for example, a linear, cyclic, or network-like silicone compound.
- a partially branched linear organopolysiloxane, and particularly preferred is a linear organopolysiloxane. More specifically, an organopolysiloxane having a molecular structure in which a silicone main chain is bonded to an alkoxy group via a methylene chain is preferable.
- organosiloxane for example, commercially available SH1107, SR2402, BY16-160, BY16-161, BY16-160E, BY16-161E, and BY16-161E manufactured by Toray Dow Corning Co., Ltd. are preferably used. Can be.
- the amount of the organosiloxane added is 0.05 to 2.0 with respect to the total of 100 parts by mass of each component of the polycarbonate-based polymer mixture and the titanium oxide. A range of 0 parts by mass is preferred. If the amount is less than 0.05 parts by mass, the polycarbonate resin may be degraded, and the molecular weight of the resin may be reduced. Further, even if the amount exceeds 2.0 parts by mass, the effect is not so much improved in spite of the added amount, which is economically disadvantageous, and silver may be generated on the surface of the molded body, which may deteriorate the appearance of the product. is there.
- the polycarbonate resin composition according to the present invention contains, in addition to the above-mentioned polycarbonate-based polymer mixture, titanium oxide, PTFE, and an organosiloxane, within a range that does not impair the object of the present invention and as necessary.
- various inorganic fillers, additives, or other synthetic resins, elastomers, and the like can be blended.
- polycarbonate resin composition examples of the above-mentioned inorganic filler compounded for the purpose of increasing the mechanical strength, durability, or amount of the filler include, for example, glass fiber (GF), carbon fiber, glass beads, glass flake, carbon black, calcium sulfate, calcium carbonate, and caic acid.
- Examples include calcium, alumina, silica, asbestos, talc, clay, myriki, and quartz powder.
- the additives include antioxidants such as hindered phenols and amines, such as benzotriazole-based and benzophenone-based ultraviolet absorbers, such as aliphatic carboxylic acid ester-based and paraffin-based ones.
- examples include external lubricants such as silicone oil and polyethylene wax, release agents, antistatic agents, coloring agents, and the like.
- Other synthetic resins include polyethylene, polypropylene, polystyrene, AS resin (acrylonitrile-styrene copolymer), ABS resin (Atari mouth nitrile-butadiene-styrene copolymer), and polymethyl methacrylate.
- each resin can be mentioned.
- the elastomer examples include an isobutylene-isoprene rubber, a styrene-butadiene rubber, an ethylene-propylene rubber enone-based ultraviolet absorber, for example, an aliphatic carboxylic acid ester-based, a noraffin-based, and an acrylic elastomer.
- the reflective layer of the light-shielding high-reflection laminated sheet of the present invention is preferably formed by using the above-mentioned white plastic film as a thermoplastic plastic film.
- gas such as carbon dioxide gas, etc.
- the reflectance is further improved, and the brightness is improved.
- thermoplastic resin constituting the film is not particularly limited as long as it can form a film by melt extrusion.
- examples thereof include polyester, polyolefin, polyamide, and the like.
- examples thereof include polyurethane and polyphenylene sulfide.
- polyesters are particularly preferable because polyesters and polyolefins have good dimensional stability and mechanical properties, and have a point force such that there is almost no absorption in the visible light region.
- polyester examples include polyethylene terephthalate (hereinafter abbreviated as PET), polyethylene 2,6 naphthalenedicarboxylate (hereinafter abbreviated as PEN), polypropylene terephthalate, polybutylene terephthalate, and poly 1,2 Examples thereof include 4-cyclohexylene dimethylene terephthalate.
- PET polyethylene terephthalate
- PEN polyethylene 2,6 naphthalenedicarboxylate
- PEN polypropylene terephthalate
- polybutylene terephthalate examples thereof include 4-cyclohexylene dimethylene terephthalate.
- these polyesters may be homopolymers or copolymers, but are preferably homopolymers.
- Examples of the copolymerization component in the case of a copolymer include an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid, an alicyclic dicarboxylic acid, and a diol component having 2 to 15 carbon atoms.
- examples of these include: For example, isophthalic acid, adipic acid, sebacic acid, phthalic acid, isophthalic acid containing a sulfonate group, and their ester-forming conjugates, diethylene daricol, triethylene glycol, neopentyl glycol, molecular weight of 400 to 20,000 Polyalkylene glycol and the like can be mentioned.
- Polyester is used as the base material, and whitening of the base material includes a method of adding various white dyes and white pigments, and a method of including fine bubbles in the interior described above. In order to make the expression more conspicuous, it is preferable to incorporate fine bubbles inside.
- the method of containing such fine bubbles includes (1) a method of containing a foaming agent and foaming by heat during extrusion or film formation or foaming by chemical decomposition, and (2) a method of extrusion or extrusion.
- a method of adding a gas such as carbon dioxide or a vaporizable substance to cause foaming (3) adding a thermoplastic resin that is incompatible with the polyester, melt-extrusion, and then stretching uniaxially or biaxially
- size of the bubbles obtained by the above method is 0. 5 m 2 ⁇ 50 m 2, it is the brightness enhancement preferably 1 ⁇ m 2 ⁇ 30 ⁇ m 2 It is preferred in that respect.
- the cross-sectional shape of the bubbles may be either circular or elliptical.
- a structure in which at least one bubble is present in all surfaces up to the surface is preferable. That is, when it is used as a reflector, the most preferable form is that the force of the surface force entering the film as the reflector is all reflected by the bubbles inside. Actually, some light passes through the inside of the film, and this part causes light loss. To reduce this, all rays passing through the outermost layer on the opposite side of the first layer of the multilayer sheet (the foam film) are used. It is necessary to apply a layer whose reflectivity (Y value) is 30% or less.
- the specific gravity serving as a measure of the bubble content of the white film containing such bubbles is preferably 0.1 or more and 1.3 or less.
- the specific gravity is less than 0.1, problems such as insufficient mechanical strength as a film, poor breakability, and poor handling properties may occur.
- the ratio exceeds 1.3, the content of bubbles is too low, the reflectance is reduced, and the luminance tends to be insufficient.
- the lower limit of the specific gravity is preferably 0.4. When the specific gravity is less than 0.4, there may be a problem that the content of the foam is too high and the film is easily broken during film formation.
- polypropylene resin is preferable because of its excellent thermal stability at high temperatures.
- an inorganic filler and a stretching aid are added to the polypropylene resin and mixed to form a resin composition, and the obtained resin composition is obtained. It is manufactured by forming an unstretched sheet by, for example, melt extrusion molding or the like, and then uniaxially or biaxially stretching the obtained unstretched sheet.
- the resulting porous white sheet has a uniform reflectance regardless of the sheet position and has good productivity.
- the polypropylene resin used in the present invention is not particularly limited as long as propylene is homopolymerized by a known method. Furthermore, the stereoregularity of the side chains of the polymer is not particularly limited, and deviations of isotactic, syndiotactic and atactic polypropylene can be used. These polypropylenes may be used alone or as a mixture of two or more. Melt index of polypropylene resin (M Is generally from 0.1 to 5 gZlO min, preferably from 0.2 to 3 gZlO min. The Vicat softening point of the polypropylene resin is generally preferably 130 ° C. or higher. More preferably, it is 140 ° C. or higher.
- the inorganic filler at least one selected from barium sulfate, calcium carbonate, and titanium oxide can be used.
- barium sulfate or calcium carbonate can be suitably used. More preferred is norium sulfate.
- the barium sulfate is preferably sedimentable barium sulfate having good dispersibility and mixing property of the polypropylene resin.
- the particle size of the inorganic filler affects the surface state, reflectance, productivity, and mechanical strength of the obtained porous resin sheet, those having an average particle size of about 0.1 to m are preferable. More preferably, the average particle size is about 0.3 to 5 m.
- the addition ratio of the polypropylene resin and the inorganic filler affects the light reflectance of the obtained porous sheet.
- the amount of the inorganic filler added is small, the resulting porous sheet has a low porosity, and when the amount is large, the porosity increases.
- a porous sheet having a low porosity the amount of light reflection at the interface between the resin layer and the air layer is reduced, and a porous sheet having a high light reflectance cannot be obtained. Accordingly, a porous sheet suitable for a light reflector has an appropriate aperture ratio and a high light reflectance.
- the polypropylene resin is 25 to 40% by weight and the inorganic filler is 75 to 60% by weight. More preferably, the content is 25 to 35% by weight of a polypropylene resin and 75 to 65% by weight of an inorganic filler.
- the stretching aid used in the present invention enhances the stretchability of the resin composition, and thus can improve the productivity without causing the porous resin sheet to be stretched. It also has the function of easily causing cracks between the resin and the inorganic filler during stretching. Therefore, it is possible to give a high reflectance to the obtained porous resin sheet and suppress the variation of the reflectance depending on the sheet position to 3% or less. As a result, the light reflector of the present invention can obtain uniform light reflection without uneven brightness. An ester of a fatty acid and glycerin may exhibit these properties.
- Fatty acids include octadecanoic acid, hexadecanoic acid, octadecaneic acid Octadecadienoic acid, hydroxyoctadecanoic acid, hydroxyhexadecanoic acid and the like are preferred.
- the esters of these fatty acids and glycerin include monoesters, diesters and triesters, and these may be used alone or in mixtures. Triesters are more preferable, and dehydrated castor oil containing octadecadienoic acid triglyceride as a main component and hardened castor oil containing hydroxyoctadecanoic acid triglyceride as a main component are preferably used because they are difficult to bleed in. .
- These stretching aids may be used alone or as a mixture. The addition amount of the stretching aid is preferably 0.01 to: 0 parts by weight based on 100 parts by weight of the total of the polypropylene resin and the inorganic filler
- the thickness of the porous resin sheet of the present invention used as a light reflector is preferably 50 to 300 m in consideration of reflectivity and productivity. More preferably, it is 70 to 200 m.
- the light-shielding coating layer constituting the light-shielding high-reflection sheet of the present invention is provided on the opposite surface (outermost layer) of the reflection layer to cut or suppress transmission of visible light.
- the light-shielding coating layer is formed by dispersing a black pigment in a base agent (binder).
- a base agent an acrylic urethane resin is usually used.
- the black pigment force black, lamp black, horn black, graphite, iron black, phosphorus black, cyanine black, and other color materials such as dyes or pigments can be selected and used. Especially carbon black is better.
- the light-shielding coating layer preferably has a thickness of 1 to 30 ⁇ m, more preferably 1 to 20 ⁇ m, and further preferably 2 to 20 ⁇ m. If the thickness of the light-shielding coating layer is less than 1 ⁇ m, transmission of visible light may be insufficiently suppressed. If the thickness is more than 30 m, the drying efficiency decreases when the light-shielding coating layer is formed by coating, and the drying time is reduced. Is undesirably long.
- Examples of such a light-shielding coating layer include a commercially available paint “S Y915 K” manufactured by Tokyo Ink Co., Ltd., and a paint “Ataritane TSR-5 and ataritan hardener mixed at a ratio of 10: 1” manufactured by Dainippon Paint Co., Ltd. Can be suitably used.
- a light-resistant coating can be applied to the surface of the first layer of the reflection layer, if necessary.
- This light-resistant coating layer has a function of cutting or absorbing ultraviolet light. The cut or absorption of ultraviolet light can be realized by including one or more selected from a light stabilizer and an ultraviolet absorber in the light-resistant coating layer.
- Light stabilizers and UV absorbers include hindered amines, salicylic acids, benzophenones, benzotriazoles, benzoxazinones, cyanoacrylates, triazines, benzoates, oxalic acids, and organic nickels. And organic compounds such as sol-gel, and inorganic compounds such as sol-gel.
- Hindered amine compounds include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, dimethyl succinate 1- (2-hydroxyethyl) 4-hydroxy-1,2,2,6,6-tetramethylpiperidine polycondensate , Tetrakis (2,2,6,6-tetramethyl-4-piperidyl) 1,2,3,4-butanetetracarboxylate, 2,2,6,6-tetramethyl-4-piberidylbenzoate, bis ( 1,2,2,6,6 pentamethyl-1-4 piberidyl) -2- (3,5 di-t-butyl-4 hydroxybenzyl) 2-n-butylmalonate, bis (N-methyl-2,2,2) 6,6 tetramethyl-4-piperidyl) sebacate, 1,1,1 (1,2 ethanediyl) bis (3,3,5,5-tetramethylpiperazinone) and the like.
- salicylic acid compounds include p-t-butyl fu -Lus
- Benzophenone-based compounds include 2-hydroxy-1-n-otoxybenzophenone, 2-hydroxy-4-methoxy-benzophenone, 2-hydroxy-4ethoxy-benzophenone, 2,4-dihydroxybenzophenone, and 2-hydroxy-4-methoxy-methoxy.
- Benzotriazole compounds include 2- (2,1-hydroxy-1,5,1-methylphenyl). Benzotriazole, 2- (2-hydroxy-5,1-t-butylphenyl) benzotriazole, 2- (2, -hydroxy-3,5, -di-t-butylphenyl) benzotriazole, 2- (2'-Hydroxy 3 't-butyl-5'-methylphenyl) 5-chlorobenzotriazole, 2- (2,1-hydroxy-1,3,5,1-di-t-butylphenyl) 5-cyclobenzotriazole , 2- (2-hydroxy-5,1-tert-octylphenol) benzotriazole, 2-((2-, 1-hydroxy-1,3,5,1-di-t-amylphenyl) benzotriazole, 2,2, 1-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazole-2-yl) phenol], 2 (2-(2-
- cyanoacrylate compound examples include 2-ethyl-2 cyano 3,3 diphenyl phthalate, 2-ethylhexyl 2 cyano 3,3 diphenyl phthalate, 1,3-bis- [2,1-cyano 3,3, [1-diphenylacryloyloxy] 2,2 bis-[(2 cyano 3,3,3, diphenylacryloyl) oxy] methylpropane.
- Triazines include 2- (4,6-diphenyl-1,3,5-triazine-1-yl) 5- (hexyl) oxy-phenol, 2- (4,6-bis-1,2 dimethylphenyl- 1,3,5 triazine-12-yl) 5 (hexyl) oxy-phenol.
- Benzoate compounds include 2,4-di-tert-butylphenol 3,5, -di-t-butylinoleate-4, hydroxybenzoate, resonoresinole 'monobenzoate, onoresobenzyl methyl benzoate, and the like.
- Organic nickel compounds include nickel bis (octylphenol) sulfide, [2,2, -thiobis (4 t- Octyl phenolate)] — n-Butylamine nickel, nickel complex mono-, 5-di-t-butyl 4-hydroxybenzyl-phosphate monoethylate, nickel 'dibutyl dithiocarbamate And the like.
- benzoxazinone-based compound examples include 2,2 ′-(1,4 phenylene) bis [4H—3,1 benzoxazine-4-one].
- malonic ester-based compound examples include propane dioic acid [(4-methoxyphenyl) -methylene] -dimethyl ester.
- hindered amine compounds benzophenone compounds and benzotriazole compounds are preferred.
- another resin component is appropriately mixed with the light stabilizer and Z or the ultraviolet absorber. It is preferable to use them. That is, a mixed solution in which the resin component and the light stabilizer and / or the ultraviolet absorber are dissolved in a solvent, and the resin component and one of the light stabilizer and the Z or the ultraviolet absorber are dissolved and the other is dispersed. It is preferable to separately dissolve or disperse the liquid, the resin component, the light stabilizer and the Z or ultraviolet absorber in a solvent in advance, and use the mixed solution as a coating liquid. In this case, one or more solvents selected from water and organic solvent power may be used as appropriate. It is also preferable to use a light stabilizer component and a copolymer of Z or an ultraviolet absorber component and a resin component as they are as a coating solution.
- the resin component that is mixed or copolymerized with the light stabilizer and Z or the ultraviolet absorber is not particularly limited.
- examples thereof include polyester resin, polyurethane resin, acrylic resin, methacrylic resin, and polyamide.
- Resin polyethylene resin, polypropylene resin, polychloride resin, polychloride resin -Ridene resin, polystyrene resin, polyacetate resin, fluorine resin And the like. These resins can be used alone or in combination of two or more.
- acrylic resin and methacrylic resin are preferable.
- an acrylic resin or a methacrylic resin obtained by copolymerizing a light stabilizer component and Z or an ultraviolet absorber component may be used.
- the polymerizable light stabilizer component and Z or ultraviolet absorber component are combined with the acrylic monomer component or methacrylic polymer. It is preferable to copolymerize with a nomer component.
- the polymerizable light stabilizer component and ultraviolet absorber component include hindered amine, benzotriazole, benzophenone, benzoxazinone, cyanoacrylate, triazine and malonic ester compounds. It is preferable to use one or more types selected. These polymerizable light stabilizer components and ultraviolet absorber components have hindered amine, benzotriazole, benzophenone, benzoxazinone, cyanoacrylate, triazine or malonic ester in the base skeleton, and are not polymerizable. Any compound having a saturated bond may be used.
- the polymerizable hindered amine-based compound include bis (2,2,6,6-tetramethyl-14-pyveridyl-5-attaliloyloxetylphenyl) sebacate, dimethyl succinate ⁇ 1 (2-hydroxyethyl) 4 Hydroxy-1,2,6,6-tetramethyl-1-5-atalyloyloxetylphenol-biperidine polycondensate, bis (2,2,6,6-tetramethyl-4-pi belidilu-5-methacryloxyshethylphenol) sebacate, Dimethyl succinate ⁇ 11- (2-hydroxyethyl) -4-hydroxy 2,2,6,6-tetramethyl-5-methacryloxyshylphenyl-biperidine polycondensate, bis (2,2,6,6-tetramethyl
- Examples of the polymerizable benzotriazole-based compound include 2- (2,1-hydroxy-15-atalyloyloxyshethyl) 2 ⁇ benzotriazole and 2- (2′-hydroxy-15′-methacryloxyshetyl). Phenyl) -12-benzotriazole, 2- (2,1-hydroxy-1,3-t-butyl 5,1-atalyloylethyl phenyl) 5-chloro-2H benzotriazole.
- polymerizable benzophenone-based compound examples include 2-hydroxy-14-methoxy-15-attali-yloxyshethylphenylbenzophenone and 2,2'-4,4'-tetrahydroxy-5-acryloyloxy.
- Tylphenylbenzophenone 2,2'-dihydroxy-4-methoxy-5-atariloyloxshetylphenylbenzophenone, 2,2, dihydroxy4,4 ' Dimethoxy-5-attalilooxyshethylphenylbenzophenone, 2-hydroxy-4-methoxy-5-methacryloxyshenylphenylbenzophenone, 2, 2'-4,4'-tetrahydroxy-5-methacryloxyshethylphenyl Benzophenone, 2,2'-dihydroxy-4-methoxy-5-atalyloylethylphenylbenzophenone, 2,2'-dihydroxy-4,4'dimethoxy-5-atalyloylethylphenol-lupenzophenone, and the like. .
- the acryl monomer component or methacryl monomer component or its oligomer component copolymerized with the polymerizable light stabilizer component and Z or the ultraviolet absorber component includes alkyl acrylate, alkyl methacrylate (alkyl group).
- Examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, 2-ethylhexyl, lauryl, stearyl, cyclohexyl, etc.) Monomers having a functional group (for example, carboxyl group, methylol group, acid anhydride group, sulfonate group, amide group, amide group amide group, amino group, amino group alkylated, hydroxyl group, epoxy group And the like).
- a functional group for example, carboxyl group, methylol group, acid anhydride group, sulfonate group, amide group, amide group amide group, amino group, amino group alkylated, hydroxyl group, epoxy group And the like.
- acrylonitrile methacrylonitrile, styrene, butyl vinyl ether, maleic acid, itaconic acid and dialkyl esters thereof, methyl vinyl ketone, vinyl chloride, vinylidene chloride, vinyl acetate, vinylpyridine, vinylpyrrolidone, and vinyl group. It can also be used as a copolymer with alkoxysilane, unsaturated polyester, etc.!
- the copolymerization ratio of these polymerizable light stabilizer component and Z or ultraviolet absorber component with the monomers to be copolymerized is not particularly limited.
- the ratio of Z or the ultraviolet absorber component is preferably 10% by mass or more, more preferably 20% by mass or more, and even more preferably 35% by mass or more.
- a polymer obtained by polymerizing a polymerizable light stabilizer component and Z or an ultraviolet absorber component without using the above monomers may be used.
- the molecular weight of these polymers is not particularly limited, but is usually 5,000 or more, and preferably 10,000 or more, more preferably 20,000 or more, from the viewpoint of the toughness of the coating layer.
- polymers are used in the state of being dissolved or dispersed in an organic solvent, water or a mixed solution of organic solvent Z water.
- a commercially available hybrid light-stable polymer can also be used.
- Nippon Shokubai Co., Ltd.'s "U-double”, which contains a copolymer of an acrylic monomer, a light stabilizer and an ultraviolet absorber, as an active ingredient "HC-935UE” manufactured by Sharp Yushi Kogyo Co., Ltd., which contains a copolymer of an absorbent as an active ingredient, and the like can be used.
- the thickness of the light-resistant coating layer is not particularly limited, but is preferably in the range of 0.5 to 20 m.
- an intermediate layer that is the second layer and subsequent layers and that includes the outermost layer can be provided as necessary.
- a recycled material of the present laminated sheet edge slit material, poor appearance material, scrap material from thermoforming
- its total light reflectance (Y value) is preferably at least 80%.
- a high reflection layer having the same total light reflectance (Y value) of 96% or more as the first layer can be provided as the third layer of the intermediate layer.
- FIG. 1 is a schematic view of a cross section of a light-shielding high-reflection laminated sheet showing one embodiment of the present invention.
- 1 is a light-resistant coating layer
- 2 is a high-reflection layer
- 3 is a recycled layer
- 4 is a high-reflection intermediate layer
- 5 is a light-shielding coating layer.
- the light-shielding high-reflection laminated sheet shown in Fig. 1 has a light-resistant coating layer 1 (provided as necessary) that has the function of cutting or absorbing ultraviolet light, and the first layer has a total light reflectance of 96% or more.
- the second layer of the reflective layer 2 and the intermediate layer is a recycled layer 3 (reflective layer provided as necessary) having a total light reflectance of 80% or more, which is the recycled material described above, and the third layer of the intermediate layer is the first layer.
- the same high-reflection intermediate layer 4 with total light reflectance of 96% or more (provided as necessary) and the outermost layer on the opposite side of the light-resistant coating layer 1 or high-reflection layer 2 have a total light reflectance of 30%. % Or less, and comprises a light-shielding coating layer 5 that suppresses or blocks transmission of visible light of not more than%, and has a total light transmittance of less than 0.3% as a laminated sheet.
- the light-shielding high-reflection laminated sheet of the present invention has a bent hinge portion for facilitating the assembly of the molded article as required.
- the base sheet constituting the light-shielding high-reflection laminated sheet of the present invention is molded as follows. Is done. First, the above-described polycarbonate resin yarn is dried usually at 120 to 140 ° C. for about 2 to about LO time, extruded by an extruder equipped with a devolatilizer, and has a die temperature of about 200 to 260 ° C. and a roll temperature of 120. Form a sheet at about 180 ° C.
- the drying condition of the PC resin composition is preferably 130 to 140. C, 2-10 hours, more preferably 130-140. C, 4 to 10 hours.
- the drying of the PC resin composition can be performed in an atmosphere such as general heated air, dry air, or under vacuum. By this drying, it is possible to remove water contained in the material and many volatile reaction by-products generated during the compounding.
- a devolatilizing device is required for an extruder for forming a sheet.
- This devolatilizing device is capable of reducing the pressure of the melted PC resin yarn to below atmospheric pressure. During extrusion, the pressure is reduced to 8.0 kPa (60 mmHg) or less, preferably to 4.0 OkPa (30 mmHg) or less. .
- This vacuum devolatilization removes water remaining in the PC resin composition and volatile reaction complex products generated during the compounding process, and also removes secondary volatile reaction complex products generated by the extrusion molding. Products can also be removed.
- the polycarbonate resin composition is insufficiently dried and devolatilized at the time of extrusion molding, foaming of the base sheet or roughening of the surface state occurs, resulting in a decrease in reflectance or uneven reflection.
- the die temperature is usually from 200 to 260 ° C, preferably from 200 to 250 ° C, more preferably from 200 to 240 ° C. If the die temperature exceeds 260 ° C, the draw resonance phenomenon is likely to occur, resulting in uneven thickness in the width direction (especially at the end) and in the length direction of the sheet, and uneven reflection on the surface of the sheet alone and its thermoformed product. Is likely to occur. This is a phenomenon that easily occurs in sheet molding when the polycarbonate resin composition according to the present invention contains a large amount of titanium oxide powder.
- the temperature of the cooling roll at the time of sheet forming is usually 120 to 180 ° C, preferably 120 to 170 ° C. If the temperature of all rolls is lower than 120 ° C, the rigidity of the melt of this material is high-the width where sizing between rolls is difficult, and the uniformity of the surface state in the longitudinal direction cannot be maintained. Reflection unevenness is likely to occur on the surface of this sheet alone and its thermoformed product. If the temperature of all rolls exceeds 170 ° C., adhesion and adhesion to the rolls will cause surface adhesion, peeling unevenness and sheet warpage, and it will not be possible to obtain a base sheet having uniform reflection characteristics.
- the light-resistant coating layer containing the light stabilizer and the Z or ultraviolet absorber may be provided directly on the base sheet, but if the adhesiveness is insufficient, the surface of the base sheet is subjected to corona discharge. It is preferable to provide the light-resistant coating layer after the treatment or the undercoating treatment.
- the undercoating treatment may be a method provided in the sheet manufacturing process (inline coating method), or a method in which a base sheet is manufactured and then separately applied and provided (offline coating method).
- the material used for the undercoating treatment is not particularly limited, and may be appropriately selected. Copolymer polyester resin, polyurethane resin, acrylic resin, methacrylic resin, various coupling agents, and the like are preferable.
- the coating liquid can be applied by any method.
- methods such as gravure coating, roll coating, spin coating, reverse coating, bar coating, screen coating, blade coating, air knife coating, and dating can be used. After the application, it is dried, for example, in a hot air oven at a temperature of usually 80 to 120 ° C.
- a known method can be employed. For example, a thermal curing method, a curing method using an actinic ray such as an ultraviolet ray, an electron beam, or a radiation ray, and a curing method using a combination thereof can be applied.
- the coating liquid for forming the light-resistant coating layer may be applied (in-line coating) at the time of manufacturing the base sheet, or applied (off-line coating) on the base sheet after the completion of the crystal orientation. Is also good.
- a light-shielding coating layer is formed on a sheet extruded by the above-described sheet manufacturing method.
- a light-shielding solution is directly coated with a gravure roll, sprayed in a mist state, sprayed, etc. to form a dry thickness of 1 to 30 m, and heated to 80 to 120 ° C in a hot air oven. Dry to the extent. Or co-extrusion with light-shielding resin is also effective It is.
- a recycled material of the present laminated sheet (edge slit material, poor appearance, aged material in aged form, yield material) and the like can be used as the intermediate layer.
- a method of forming the intermediate layer co-extrusion molding is generally used.
- each resin type to be laminated is extruded using a separate extruder under the same conditions as those for the sheet molding method described above, and each resin is multilayered.
- a feed block method in which each resin is laminated in front of a die
- a multi-hold method in which multiple layers are formed in a die.
- the high-reflection laminated sheet of the present invention has thermoformability, and it is possible to produce a mature molded article such as a reflector having a reflecting surface according to the number and shape of light sources under specific thermoforming conditions.
- the sheet heating temperature (sheet surface temperature) during thermoforming is usually 160 to 200 ° C, preferably 170 to 200 ° C, and the average expansion ratio is usually 1.1 to 2 times, preferably 1.2. ⁇ 1.8 times.
- thermoforming in the present invention is not particularly limited, but press forming, vacuum forming, vacuum pressure forming, hot plate forming, corrugated plate forming, and the like can be used.
- the forming method generally called vacuum forming, drape homing method, matched die method, pressure-bubble plug assist vacuum forming method, plug assist method, vacuum snapback method, air-slip homing, trapped sheet contact Heating-pressure homing method, simple compressed air forming method and the like can be mentioned.
- the pressure for the vacuum forming may be appropriately set at IMPa or lower.
- the sheet heating temperature is lower than 160 ° C, thermoforming is difficult, and if it is higher than 200 ° C, uneven surface roughness tends to occur on the sheet surface.
- the sheet used in the thermoforming is preferably preliminarily dried to prevent a foaming phenomenon due to moisture absorption, which is preferable. In this case, drying conditions are suitably 120 to 140 ° C and 2 to 10 hours.
- the shape of the molded article may be appropriately selected according to the shape, number, and characteristics of the light source. For example, in the case of a reflector for a direct type liquid crystal backlight, Japanese Patent Application Laid-Open Nos. 2000-260213, 2000-356959, 2001-297613, and 2002-32029 disclose the same. Shape.
- the present invention also provides a thermoformed article using the above-described light-shielding high-reflection laminated sheet of the present invention, or a housing in which the light-shielding high-reflection sheets are bonded to each other.
- a method such as ultrasonic welding, laser welding, or hot plate welding can be adopted.
- Viscosity average molecular weight (Mv) The viscosity of the methylene chloride solution at 20 ° C. was measured using an Ubbelohde viscometer, and the intrinsic viscosity [ ⁇ ] was determined from the viscosity, and calculated by the following equation.
- the intensity was determined based on the intensity ratio between the peak of the methyl group of isopropyl of bisphenol A at 7 ppm and the peak of the methyl group of dimethylsiloxane at 0.2 ppm.
- Example 3 Before the light-shielding coating treatment, the laminate described in Example 3 below was pulverized by an extruder with a pulverizer to a size (average particle diameter of 2 to 3 mm) that could be inserted into the laminate. 30 mass% was dry-blended with respect to the resin composition-2.
- Coating agent for bonding layers between layers of a multilayer sheet A mixture of Dick Dry LX90 and KW75 dry laminating agents manufactured by Dainippon Ink and Chemicals, Inc. in a 9: 1 ratio. Dissolve in ethyl acetate to make a 20% solution, apply it on the anti-light-shielding surface of the third layer with a coating thickness of 10 m, and use it to bond the first and third layers.
- the polycarbonate composition 1 (PC1 pellet) obtained in Production Example 2 was dried in a hot air oven at 140 ° C. for 4 hours. This material is extruded horizontally using a 65 ⁇ single-screw extruder equipped with a devolatilizer, a gear pump, and an extruder equipped with a coat hanger die with a width of 60 cm. Sheet was obtained.
- the cylinder temperature is 250-260 ° C
- the devolatilization pressure is 1.3kPa (10mmHg)
- the die temperature is 210.
- roll temperature NO.1 / NO.2 / NO.3 120Zl50Zl70.
- C output 30 kgZhr.
- Coating agent 1 was applied to the opposite side of the reflection surface of the sheet using a bar coater (as the outermost layer) to a dry thickness of 20 m, and dried in a hot air oven at 100 ° C for 30 minutes.
- polycarbonate composition 1 (PC1 pellet) obtained in Production Example 2 and the polycarbonate composition 2 (PC2 pellet) obtained in Production Example 3 were dried in a hot air oven at 140 ° C. for 4 hours.
- polycarbonate composition 2 was a 65 m ⁇ single screw extruder with a devolatilizer
- polycarbonate composition 1 was a 30 ⁇ single screw extruder with a devolatilizer, a feed block, and a 60 cm wide coat hanger die.
- the co-extrusion was performed in the horizontal direction by an extruder, and the sheet was formed by a three-roll cooling roll method to obtain a sheet of polycarbonate composition-one layer of 100 m, two layers of polycarbonate composition of 700 m, and a total thickness of 800 m. .
- the cylinder temperature is 250-260 ° C
- the devolatilization pressure is 1.3kPa (10mmHg)
- the die temperature is 260.
- roll temperature NO.1 / NO.2 / NO.3 120Zl50Zl70.
- the extrusion rate was 7 kgZhr for polycarbonate composition-1 and 43 kg / hr for polycarbonate composition-2.
- the coating agent 1 was applied to the PC2 side (as an outermost layer) using a bar coater to a dry thickness of 20 m using a bar coater, and dried in a hot air oven at 100 ° C for 30 minutes.
- polycarbonate composition 1 (PC1 pellet) obtained in Production Example 2 and the polycarbonate composition 2 (PC2 pellet) obtained in Production Example 3 were dried in a hot air oven at 140 ° C. for 4 hours.
- polycarbonate composition 2 has a 65 m ⁇ single screw extruder with a devolatilizer
- polycarbonate composition 1 has a 30 ⁇ single screw extruder with a devolatilizer, a feed block, and a 60 cm wide coat hanger die.
- Two types and three layers are co-extruded in the horizontal direction with an extruder, and the sheet is formed by three vertical cooling rolls.
- One layer of the polycarbonate composition is 200 m
- two layers of the polycarbonate composition are 400 m
- a sheet having a thickness of 200 ⁇ m and a total thickness of 800 ⁇ m was obtained.
- the cylinder temperature is 250-260 ° C
- the devolatilization pressure is 1.3kPa (10mmHg)
- the die temperature is 260.
- roll temperature NO.1 / NO.2 / NO.3 120Zl50Zl70.
- the extrusion rate was 25 kg / hr for polycarbonate composition-1 and 25 kg / hr for polycarbonate composition-2.
- the coating agent 1 is applied to the polycarbonate yarn 1 side (as an outermost layer) with a bar coater to a dry thickness of 20 ⁇ m using a bar coater, and is applied in a hot air oven at 100 ° C. for 30 minutes. And dried.
- PC2 Polycarbonate composition-2
- Coating Agent 2 was applied to a thickness of 10 ⁇ m.
- a sheet was formed and coated in the same manner as in Example 3 except that the intermediate layer (second layer) was made of polycarbonate composition 13 (PC3).
- PC3 polycarbonate composition 13
- the light-resistant coating agent 3 was applied to the reflective surface of the sheet molded in the same manner as in Example 1 to a coating thickness of 10 ⁇ m, and the coating agent 1 was applied to the opposite side (outermost layer) of the reflective surface at a thickness of 20 ⁇ m. It was applied in a thickness.
- polycarbonate yarn 1 (PC1 pellet) and the polycarbonate yarn 4 (PC 4 pellet) were dried in a hot air oven at 140 ° C. for 4 hours.
- polycarbonate composition 1 is a 65 ⁇ single-screw extruder with a devolatilizer
- polycarbonate composition-4 is a 30 ⁇ single-screw extruder with a devolatilizer, a feed block, and a 60cm width coat hanger die.
- Two types of two layers are co-extruded in the horizontal direction with each extruder having three layers, and three columns are formed into a sheet by a cooling roll method.
- One layer of the polycarbonate composition is 600 ⁇ m2 layer, and four layers of the polycarbonate composition— Was obtained with a total thickness of 200 ⁇ m.
- cylinder temperature is 250 ⁇ 260 ° C
- devolatilization pressure is 1.3kPa (10mmHg)
- roll temperature NO.1 / NO.2 / NO.3 120Zl50Zl70.
- the extrusion rate was 35 kgZhr for the polycarbonate composition-1 and 15 kg / hr for the polycarbonate composition-4.
- the first layer was performed in the same manner as in Example 1 except that Toray Industries, Inc. foamed PET film “Lumirror E60L” was multilayered with a thickness of 200 m.
- the first layer was carried out in the same manner as in Example 1 except that the supercritical foamed PET film (trade name: RA) manufactured by Furukawa Electric Co., Ltd. was multilayered with a thickness of 200 m.
- RA supercritical foamed PET film
- the first layer was carried out in the same manner as in Example 1 except that the foamed PP film (trade name: White Refstar) manufactured by Mitsui Iridaku Co., Ltd. was multi-layered with a thickness of 200 ⁇ m.
- the foamed PP film (trade name: White Refstar) manufactured by Mitsui Iridaku Co., Ltd. was multi-layered with a thickness of 200 ⁇ m.
- Polycarbonate yarn 1 (PC1 pellet) was dried in a hot air oven at 140 ° C. for 4 hours. This material was extruded horizontally using a 65 ⁇ single-screw extruder equipped with a devolatilizer, a gear pump, and an extruder equipped with a 60cm-wide coat hanger die. A sheet having a thickness of 6 mm was obtained.
- the cylinder temperature is 250 to 260 ° C
- the devolatilization pressure is 1.3 kPa (10 mmHg)
- the die temperature is 210.
- roll temperature NO.1 / NO.2 / NO.3 120Zl50Zl70.
- the extrusion rate was 30 kgZhr. No light-shielding coating layer was provided.
- a sheet was produced in the same manner as in Comparative Example 1 using polycarbonate resin composition 2 (PC2 pellets).
- a laminated sheet was produced in the same manner as in Example 5, but the light-shielding coating layer was not provided.
- the Y value means the stimulus value ⁇ when the tristimulus values X, ⁇ , and ⁇ ⁇ ⁇ ⁇ for the color of the sample (molded body) are determined by a spectrophotometric method according to the method described in JIS K 7105.
- the values correspond to the luminance or luminous reflectance, and the reflectance of 400 to 700 nm including specular reflection under the conditions of a D65 light source and a viewing angle of 10 degrees using MS2020 Plus manufactured by Mccbeth. It was measured
- the total light transmittance was measured based on the method described in JIS K 7105, and was measured using SZ Sigma 90 manufactured by Nippon Denshoku Industries Co., Ltd.
- the fluorescent tube for the liquid crystal display was turned on, and the reflection surface of the sheet was placed on the surface of the fluorescent tube, and the presence or absence of transmitted light from the fluorescent tube was checked.
- ⁇ No leak
- X Leak
- a bending groove having a width of 2 mm and a depth of 1 mm was formed by press molding at 140 ° C. Fold the groove and make a 15-inch (dimension 23.4 x 30.7 cm) box-shaped reflector as a direct-type backlight reflector, and ultrasonically weld the overlapped portion of the sheets (condition: 28.5 kHz, oscillation time (0.008sec).
- a test was conducted with six cold cathode tubes arranged in parallel inside the backlight. No light leakage was observed when the cold cathode tubes were turned on, even when the cold cathode tubes were turned on.
- Example 1 After the sheet of Example 1 was dried at 100 ° C for 8 hours, a bending groove having a width of 2 mm and a depth of lmm was formed by press molding at 140 ° C.
- the bent groove was bent to form a box shape, and two cold cathode tubes were arranged on the long side of a 15-inch acrylic light guide plate (dimensions 23.4 ⁇ 30.7 cm, thickness 4 mm). Further, the edge of the box was bent so as to cover the upper part of the cold-cathode tube, and the superposed portion of the sheet light guide plate was bonded by ultrasonic welding (condition: 28.5 kHz, oscillation time: 0.08 sec) to a bonding size of 5 mm.
- ultrasonic welding condition: 28.5 kHz, oscillation time: 0.08 sec
- I is the average luminance 300CdZcm 2 or put out ChikaraTsuta. From the above, a sufficiently practical backlight for liquid crystal can be manufactured.
- the light-shielding high-reflection sheet of the present invention is a light-emitting light source such as a display such as a liquid crystal display backlight, a fluorescent tube, an LED, an EL, a plasma, or a laser used in general lighting fixtures, houses and construction equipment. It can be effectively applied to products that require simultaneous reflection and light shielding.
- a light-emitting light source such as a display such as a liquid crystal display backlight, a fluorescent tube, an LED, an EL, a plasma, or a laser used in general lighting fixtures, houses and construction equipment. It can be effectively applied to products that require simultaneous reflection and light shielding.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112005001068T DE112005001068T5 (de) | 2004-05-20 | 2005-05-20 | Lichtabschirmende hochreflektierende Multischicht-Polycarbonatfolie, und thermogeformter Körper und Gehäuse unter Verwendung derselben |
KR1020067024167A KR101238484B1 (ko) | 2004-05-20 | 2005-05-20 | 차광성 고반사 적층 시트 및 이것을 사용한 열성형체 및 케이스 |
CN2005800246443A CN1989430B (zh) | 2004-05-20 | 2005-05-20 | 遮光性高反射聚碳酸酯多层片材,以及采用其的热成型体和机壳 |
US11/569,131 US20080212213A1 (en) | 2004-05-20 | 2005-05-20 | Light-Shielding Highly Reflective Multilayer Sheet, and Thermoformed Body and Case Using Same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004150028A JP4541029B2 (ja) | 2004-05-20 | 2004-05-20 | 遮光性高反射積層シート及びそれを用いてなる熱成形体及び筐体 |
JP2004-150028 | 2004-05-20 |
Publications (1)
Publication Number | Publication Date |
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WO2005114267A1 true WO2005114267A1 (ja) | 2005-12-01 |
Family
ID=35428496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/009226 WO2005114267A1 (ja) | 2004-05-20 | 2005-05-20 | 遮光性高反射積層シート及びそれを用いてなる熱成形体及び筐体 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080212213A1 (ja) |
JP (1) | JP4541029B2 (ja) |
KR (1) | KR101238484B1 (ja) |
CN (1) | CN1989430B (ja) |
DE (1) | DE112005001068T5 (ja) |
TW (1) | TW200613442A (ja) |
WO (1) | WO2005114267A1 (ja) |
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JP4410054B2 (ja) * | 2004-07-30 | 2010-02-03 | 出光興産株式会社 | 光反射シート及びその成形品 |
JP2007168089A (ja) * | 2005-12-19 | 2007-07-05 | Toray Ind Inc | 反射板用白色積層ポリエステルフィルム |
JP2008003254A (ja) * | 2006-06-21 | 2008-01-10 | Idemitsu Kosan Co Ltd | 光線反射用多層シート、これを用いた反射器、照明装置及び液晶表示装置 |
JP5117757B2 (ja) * | 2007-04-26 | 2013-01-16 | 日東電工株式会社 | ポリオレフィン系樹脂発泡体を含む光反射部材、およびその製造方法 |
JP5706667B2 (ja) * | 2010-11-08 | 2015-04-22 | 出光興産株式会社 | ポリカーボネート系樹脂組成物、成形品、及び太陽光発電用構造部材 |
JP5807365B2 (ja) * | 2011-04-11 | 2015-11-10 | 東レ株式会社 | ポリカーボネート系樹脂シートおよびそれを用いた太陽電池 |
JP5852797B2 (ja) * | 2011-05-30 | 2016-02-03 | 出光興産株式会社 | 電池パック用ポリカーボネート樹脂組成物及び電池パック |
CN103091762A (zh) * | 2011-10-31 | 2013-05-08 | 深圳富泰宏精密工业有限公司 | 导光柱及其制造方法、应用该导光柱的便携式电子装置 |
DE102012200497A1 (de) | 2012-01-13 | 2013-07-18 | Robert Bosch Gmbh | Verfahren und Anordnung zur Herstellung oder Reparatur eines Solarmoduls |
JP5846964B2 (ja) * | 2012-02-28 | 2016-01-20 | 出光興産株式会社 | 電流遮断器筐体及びこれを用いた電流遮断器 |
JP5962904B2 (ja) * | 2012-04-26 | 2016-08-03 | パナソニックIpマネジメント株式会社 | 光源装置及び該光源装置を備える投写型表示装置 |
JP2015002090A (ja) * | 2013-06-17 | 2015-01-05 | Nltテクノロジー株式会社 | 面発光装置及び液晶表示装置 |
CN104165329B (zh) * | 2014-08-13 | 2016-08-17 | 福建省锐驰电子科技有限公司 | 一种可吸塑反射片 |
JP2016062022A (ja) * | 2014-09-19 | 2016-04-25 | スリーエム イノベイティブ プロパティズ カンパニー | バックライト用箱体 |
WO2017047649A1 (ja) * | 2015-09-15 | 2017-03-23 | コニカミノルタ株式会社 | 光反射フィルム及び液晶表示装置用バックライトユニット |
CN106995578A (zh) * | 2016-01-26 | 2017-08-01 | 合肥杰事杰新材料股份有限公司 | 耐黄变低透光率丙烯腈-丁二烯-苯乙烯/聚碳酸酯合金材料及其制备方法 |
EP3527618B1 (en) | 2016-10-14 | 2023-07-26 | Mitsubishi Gas Chemical Company, Inc. | Polyolefin structure |
TWI708408B (zh) * | 2017-09-29 | 2020-10-21 | 友達光電股份有限公司 | 光源裝置 |
JP7139741B2 (ja) * | 2018-07-13 | 2022-09-21 | 三菱ケミカル株式会社 | 光学用保護フィルム |
CN116572493A (zh) * | 2023-07-07 | 2023-08-11 | 成都希德光安全科技有限公司 | 复合激光防护板及其加工工艺 |
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- 2005-05-20 WO PCT/JP2005/009226 patent/WO2005114267A1/ja active Application Filing
- 2005-05-20 DE DE112005001068T patent/DE112005001068T5/de not_active Withdrawn
- 2005-05-20 TW TW094116660A patent/TW200613442A/zh unknown
- 2005-05-20 KR KR1020067024167A patent/KR101238484B1/ko not_active IP Right Cessation
- 2005-05-20 US US11/569,131 patent/US20080212213A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
DE112005001068T5 (de) | 2007-04-19 |
JP2005331710A (ja) | 2005-12-02 |
US20080212213A1 (en) | 2008-09-04 |
KR20070016143A (ko) | 2007-02-07 |
CN1989430A (zh) | 2007-06-27 |
KR101238484B1 (ko) | 2013-03-04 |
JP4541029B2 (ja) | 2010-09-08 |
TW200613442A (en) | 2006-05-01 |
CN1989430B (zh) | 2010-09-01 |
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