CN102365564B - Light reflector, lighting device, and lighting device for cultivating plant - Google Patents

Abstract

Provided is a light reflector which reflects light from a light source, such as sunlight or artificial light emitted from a fluorescent lamp and which can emit reflected light having a wavelength distribution different from a wavelength distribution of the light emitted from the light source. A light reflector is characterized by the emission of reflected light having a wavelength distribution different from a wavelength distribution of the light emitted from the light source and can provide a hue which was unable to obtain from a conventional white or silver reflection plate by emphasizing the light having a wavelength distribution different from the wavelength distribution of the light emitted from the light source, can fulfill the dramatic impact effect by illumination, and can be advantageously used in applications in which, for example, the hue of the illumination light, etc., used for commodities arranged in a showcase is considered important.

Description

Light reflector, lighting device and plant culture lighting device

Technical field

The present invention relates to radiate have from light wavelength by light source radiation and distribute the light of different Wavelength distribution as catoptrical light reflector, and the lighting device and the plant culture lighting device that have used this light reflector.

Background technology

At present, in lamp decoration plate fields such as lighting field, the advertising lamps such as the field of display such as TV, monitor, lamp affixed to the ceiling, lower illuminator, preventing lamp, emergency light, trap lamp etc., in order to be effectively used to the light of the light sources such as autofluorescence lamp, cold-cathode tube, in the behind of light source, use the light reflector of highly reflective.This reflecting plate is silver color or white, reflects and do not change the spectrum of the light being sent by light source in visible region.

In addition, proposed as artificial lamp for preventing lamp, trap lamp etc., utilized the illumination etc. of the light of part wavelength.All methods are all used the special light sources of the light of radiation particular wavelength region, therefore have the problem that cost is high.

For example, a kind of outdoor use ligthing paraphernalia has been proposed in patent documentation 1, a plurality of blue leds that it possesses a plurality of White LEDs (light emitting diode) of the illumination light of lighting white light and lights the illumination light of blue light.The blue light that this outdoor use ligthing paraphernalia utilization is radiated by blue led has and acts on people's parasympathetic nerve and make the sedation effect of its emotion calmness seek the raising of preventing effect, but need to use a large amount of LED, the problem that exists cost to uprise.

In addition, proposed a kind of color correction lighting device in patent documentation 2, it possesses as the fluorescent light of white light source with as the red light emitting diodes of red light source, with the mixed light of described fluorescent light and red light emitting diodes, throws light on.

Yet, in above-mentioned complementary color lighting device, use the light quantity red light emitting diodes less with respect to fluorescent light to carry out complementary color, therefore with regard to the variation of the color of the light that radiated by lighting device, be very little, and a little less than adding that people is to red visibility, so present situation is the stage effect of being brought by illumination not obtaining as expected.

Therefore, also can consider by increasing the quantity of red light emitting diodes or increasing the variation that the output power of red light emitting diodes increases the color of the light being radiated by lighting device, but can produce other problem that power consumption increases.

On the other hand, be accompanied by the variation of the earth environments such as global warming, the abnormal weathers such as arid, flood take place frequently, in addition, for the population of tackling under global scale increases, in recent years, need to develop in a hurry that scioptics, light reflector etc. are assembled solar light irradiation in plant and the technology of cultivating, the plant cultivation technology that utilizes artificial light.

A kind of plant cultivating device that uses fluorescent light has been proposed in patent documentation 3.The growth of plant depends on the light wavelength being irradiated on plant to a great extent, therefore for less containing light time of fluorescent light of the light of the wavelength region may that plant absorbs, need to strengthen the activity of the light of fluorescent light, the problem that exists power consumption to raise, and there is the problem that is difficult to control cultivation of plants environment temperature due to fluorescent light heating.

In addition, in patent documentation 4,5, propose a kind of plant cultivating device that has used red LED and blue led, but because the diffusion of light of LED is poor, therefore had the problem that is difficult to plant to be irradiated equably light, and owing to having used LED, the problem that therefore also exists cost to uprise.

prior art document

patent documentation

Patent documentation 1: TOHKEMY 2008-305768 communique

Patent documentation 2: TOHKEMY 2008-210660 communique

Patent documentation 3: TOHKEMY 2001-352838 communique

Patent documentation 4: No. 3105360 communique of Japanese Utility Model mandate

Patent documentation 5: Japanese kokai publication hei 9-252651 communique

Summary of the invention

the problem that invention will solve

The invention provides can reflector fluorescent light etc. the light and irradiating of light source have from light wavelength by light source radiation distribute different Wavelength distribution light, light reflector, and the lighting device and the plant culture lighting device that have used this light reflector.

for the scheme of dealing with problems

Light reflector of the present invention is characterised in that, its radiation has from light wavelength by light source radiation and distributes the light of different Wavelength distribution as reflected light.

As light reflector A, as long as having from light wavelength by light source radiation, radiation distributes the light of different Wavelength distribution as reflected light, be not particularly limited, for example can enumerate: the light reflector that contains luminophor; Possess reflection layer and at the light reflector of the upper stacked integrated and luminophor layer that contains the luminophor luminous in visible region of the face (first surface) in above-mentioned reflection horizon, etc.

As light reflector, be preferably as shown in Figure 1, on a face of reflection layer 1 by the stacked integrated light reflector forming of the luminophor layer 2 that contains the luminophor luminous in visible region, more preferably possesses the light reflector that reflection layer 1 and luminophor layer form, described luminophor layer is upper stacked integrated at the face (first surface) of this reflection layer 1, and contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor or in the wavelength region may of 570～700nm, there are any one or both in the luminophor at peak of luminescent spectrum.In addition, in Fig. 1, as an example, show the light reflector of sheet.

Then, to possessing the light reflector of reflection layer 1 and luminophor layer 2, be elaborated, described luminophor layer 2 is upper stacked integrated at the face (first surface) of this reflection layer 1, and contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor or in the wavelength region may of 570～700nm, there are any one or both in the luminophor at peak of luminescent spectrum.

As above-mentioned reflection layer 1, as long as can reflect the light that makes the luminous wavelength region may of the luminophor that contains in aftermentioned luminophor layer 2, preferably, can further reflect the light of the wavelength region may that the luminophor that makes to contain in luminophor layer 2 absorbs.

Like this, reflection layer 1 is to the light of the luminous wavelength region may of luminophor layer 2 direction reflection light, thereby the light quantity of the specific wavelength that radiated by light reflector is increased, can seek to improve the light reflective of light reflector and improve the effect that changes catoptrical tone.

In addition, in the situation that reflection layer 1 can further reflect the light of the wavelength region may that the luminophor that contains in making luminophor layer 2 absorbs, can make the light not absorbed by luminophor through luminophor layer 2 reflect, make it again incide luminophor layer 2 and absorbed by luminophor to luminophor layer 2 direction by reflection layer 1, can increase the light quantity of being radiated by luminophor and further seek to improve the change light reflective of light reflector and the effect of catoptrical tone.

The light total reflectivity of reflection layer 1 is preferably more than 80%, more preferably more than 85%.In addition, the light total reflectivity of reflection layer 1 refers to the value of measuring according to JIS Z8722.

And, if the average transmittance of the wavelength region may of 360～740nm of reflection layer 1 is high, the light reflective that the light being sent by luminophor layer can see through reflection layer, light reflector can reduce, and is therefore preferably below 10%, more preferably, below 1%, be particularly preferably 0%.In addition, the average transmittance of the wavelength region may of 360～740nm of reflection layer refers to the value of measuring according to JIS Z8722.

As this reflection layer 1, be preferably synthetic resin sheet, more preferably thermoplastic resin sheet.As reflection layer 1, such as enumerating: the non-foamed sheet of light reflective or the foamed sheet that contain the particles such as titania, silicon dioxide; The sheet that the hybrid resin that synthetic resin incompatible with each other is mixed is formed stretches to form a plurality of spaces and the non-foamed sheet that obtains; To containing Packed non-foamed sheet that stretches to form a plurality of spaces and obtain; The light reflective foamed sheet that contains a large amount of micro air bubbles; Etc., material that preferably can thermoforming.In addition, reflection layer 1 can suitably be selected above-mentioned non-foamed sheet or foamed sheet and by a plurality of folded integrated and obtain layer by layer.

If reflection layer 1 is as shown in Figure 2, with above-mentioned non-foamed sheet 1a and the stacked integrated and above-mentioned non-foamed sheet 1a of above-mentioned foamed sheet 1b, in the mode of luminophor layer 2 side, form, can give reflection layer intensity, from conformality or mouldability, thereby preferably.

In addition, reflection layer 1 with above-mentioned non-foamed sheet 1a and the stacked integrated and above-mentioned non-foamed sheet 1a of above-mentioned foamed sheet 1b when the mode of luminophor layer side forms, in order to improve the light reflectance of reflection layer 1, preferably make foamed sheet 1b contain titania.

If the content of the titania in foamed sheet 1b is few, sometimes do not show the effect that improves light reflectance, if content is many, the light weight of light reflector reduces sometimes, therefore with respect to synthetic resin 100 weight portions that form foamed sheet 1b, be preferably 5～50 weight portions, more preferably 10～40 weight portions.

Synthetic resin as forming reflection layer 1, is not particularly limited, such as enumerating the polyolefin-based resins such as Low Density Polyethylene, high density polyethylene, ethene-alpha-olefin copolymer, polypropylene, cyclic polyolefin; The polyester based resins such as polyethylene terephthalate, PEN, polybutylene terephthalate, PLA; Nylon-6, nylon-6, the polyamide-based resins such as 6; The polystyrene resins such as polystyrene, ABS resin, AS resin; The polycarbonate-based resin such as polycarbonate, polyestercarbonate; The chlorine such as Polyvinylchloride, polyvinylidene chloride is resin; The thermoplastic resins such as the acrylic resin such as polymethylmethacrylate, polyethyl methacrylate.In addition, synthetic resin can be used separately, also can be used together two or more.As above-mentioned alpha-olefin, such as enumerating propylene, 1-butylene, 1-amylene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-nonene, 1-decene etc.

Particle as containing in the non-foamed sheet of above-mentioned light reflective or foamed sheet, such as enumerating zinc paste, zinc white, talcum, calcium carbonate, titania, silicon dioxide etc., is preferably the titania large with the specific refractivity of synthetic resin, reflectivity is high.

Titania has rutile-type, Detitanium-ore-type, brookite type, is preferably rutile titanium dioxide.Titania causes resin deteriorated because of its photocatalysis conventionally, therefore preferably titania is carried out to surface treatment.

If the content of the titania in synthetic resin sheet is few, the light reflective properties of light reflector reduces, and on the other hand, if content is many, the light weight of light reflector also reduces, and is therefore preferably 30～200g/m ², 40～150g/m more preferably ².In addition, while having a plurality of synthetic resin sheet that contains titania in reflection layer 1, the content of the titania in synthetic resin sheet refers to the total content of the titania containing in a plurality of synthetic resin sheets.

In addition, in order to give light reflector intensity, from conformality or mouldability, also can be at the upper stacked integrated foaming body layer that has of another face (the second face) of the reflection layer of light reflector.Form the laminated resin of this foaming body same with the synthetic resin that forms reflection layer, therefore description thereof is omitted.

Then, stacked integrated luminophor layer 2 on reflection layer 1 is described.This luminophor layer 2 contains in visible region (wavelength region may of 360～740nm) luminous luminophor in synthetic resin.

Luminophor layer 2 preferably in synthetic resin, contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor or in the wavelength region may of 570～700nm, there are any one or both in the luminophor at peak of luminescent spectrum.

To containing in luminophor layer 2, wavelength region may at 400～470nm has the luminophor at peak of luminescent spectrum or any one or both situations having in the luminophor at peak of luminescent spectrum in the wavelength region may of 570～700nm is elaborated.

Light reflector A is as follows: by luminophor, be absorbed into a part for the incident light that is mapped to luminophor layer 2, and luminophor is at the light-emitting zone that had separately, the wavelength region may of 400～470nm or the wavelength region may of 570～700nm are sent light.

; the luminophor radiation light (light of blue series) of wavelength region may of 400～470nm or the light (light of red colour system) of the wavelength region may of 570～700nm that in luminophor layer 2, contain, any one or both that make to compare with incident light in the light of the catoptrical blue series that reflected by light reflector or red colour system are emphasized.

Therefore, by emphasizing any one or both in the light of blue series or red colour system, make the light of the easy perception blue series of human eye or red colour system, can for display device, illumination etc., pay attention to aptly the purposes of tone.

In addition, luminophor layer 2 can only contain the luminophor in the wavelength region may of 400～470nm with the peak of luminescent spectrum, or there is any one in the luminophor at peak of luminescent spectrum in the wavelength region may of 570～700nm, also can contain the luminophor in the wavelength region may of 400～470nm with the peak of luminescent spectrum, with wavelength region may at 570～700nm have luminescent spectrum peak luminophor the two, so to making it contain the luminophor in the wavelength region may of 400～470nm with the peak of luminescent spectrum, there is any one in the luminophor at peak of luminescent spectrum with wavelength region may at 570～700nm, or make it contain both, according to the spectrum that incides the incident light of luminophor layer 2, suitably adjust.

In addition, in luminophor layer 2, contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor or in the situation that the wavelength region may of 570～700nm has the luminophor at the peak of luminescent spectrum, in the reflectance spectrum of light reflector, the difference of establishing the minimum light reflectance in the wavelength region may of maximum light reflectance in the wavelength region may of 400～470nm and 470～570nm is Δ ₁, the difference of establishing the minimum light reflectance in the wavelength region may of maximum light reflectance in the wavelength region may of 570～700nm and 470～570nm is Δ ₂time, Δ ₁or Δ ₂be more than 1% to be preferred.

Like this, by Δ ₁or Δ ₂be adjusted into more than 1%, thereby in the reflected light of light reflector, make the easier perception of human eye compare the light of the poor blue series of visibility or red colour system with the light of green system.

In addition, in luminophor layer 2, contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor or in the situation that the wavelength region may of 570～700nm has the luminophor at the peak of luminescent spectrum, in the reflectance spectrum of light reflector, it is preferred that the maximum light reflectance in the maximum light reflectance in the wavelength region may of 400～470nm or the wavelength region may of 570～700nm surpasses 100%.By adjusting like this, thereby in the reflected light of light reflector, can make the light quantity of the light of blue series or the light of red colour system more positively emphasize more than incident light, make the easier perception of human eye compare the light of the poor blue series of visibility or red colour system with the light of green system.

In addition, in luminophor layer 2, contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor and in the situation that the wavelength region may of 570～700nm has the luminophor at the peak of luminescent spectrum, in the reflectance spectrum of light reflector, the difference of establishing the minimum light reflectance in the wavelength region may of maximum light reflectance in the wavelength region may of 400～470nm and 470～570nm is Δ ₁, the difference of establishing the minimum light reflectance in the wavelength region may of maximum light reflectance in the wavelength region may of 570～700nm and 470～570nm is Δ ₂time, Δ ₁and Δ ₂be more than 1% to be preferred.

Like this, by Δ ₁and Δ ₂adjust to more than 1%, thereby in the reflected light of light reflector, can more positively emphasize the light of blue series and the light of red colour system, make the easier perception of human eye compare the light of the poor blue series of visibility and red colour system with the light of green system.

In addition, in luminophor layer 2, contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor and in the situation that the wavelength region may of 570～700nm has the luminophor at the peak of luminescent spectrum, in the reflectance spectrum of light reflector, it is preferred that the maximum light reflectance in the maximum light reflectance in the wavelength region may of 400～470nm and the wavelength region may of 570～700nm surpasses 100%.By adjusting like this, thereby in the reflected light of light reflector, can make the light quantity of the light of blue series and the light of red colour system more positively emphasize more than incident light, make the easier perception of human eye compare the light of the poor blue series of visibility and red colour system with the light of green system.

In addition,, in the reflectance spectrum of light reflector, the maximum light reflectance in the wavelength region may of 360～740nm is more than 100% to be preferred.By adjusting like this, can compare with incident light the light of more positively emphasizing the particular wavelength region that luminophor radiates in the reflected light of light reflector.

In addition, the synthetic resin that forms luminophor layer 2 is same with the synthetic resin that forms reflection layer 1, and therefore the description thereof will be omitted.The synthetic resin that forms luminophor layer 2 can be different from the synthetic resin that forms reflection layer 1.

As the luminophor containing in luminophor layer 2, use the pigment or the dyestuff that produce fluorescence or phosphorescence.The light of emitting when fluorescence refers to from excited singlet state to ground state transition, industrial, has utilized the luminophor of this phenomenon to be widely used as fluorescent pigment, fluorescent dye.

In addition, the light of emitting when phosphorescence refers to from excited triplet state to ground state transition, industrial, utilized the luminophor of this phenomenon as light-storing paint, hold photoinitiator dye and be widely used.

For the wavelength region may at 400～470nm, have luminescent spectrum peak luminophor or in the wavelength region may of 570～700nm, there is the luminophor at the peak of luminescent spectrum, having the organic system luminophor of the pigment structure with organic system, the inorganic of pigment structure with inorganic system is luminophor.

As organic system luminophor, such as the luminophor that can enumerate xanthene system, coumarin series, perylene system, naphthalimide system, acridine system, Sulfur prime system, diamido Stilbene system, imidazoles system, thiazole system, oxazole system, pyrazoline system, anthraquinone system, methine system, chromene system, thioindigo system, azo system, phthalocyanine system etc. and have organic system pigment structure.Organic system luminophor can be used separately, also can be used together two or more.

In addition, as inorganic be luminophor, for example can enumerate ZnS, (ZnCd) S sulfides, Zn ₂siO ₄, Cd ₂b ₂o ₅, YVO ₃, CaWO ₄deng oxide etc., having inorganic is the luminophor of pigment structure.Inorganic is that luminophor can be used separately, also can be used together two or more.

In addition, the luminophor as the wavelength region may at 400～470nm with the peak of luminescent spectrum, absorb the light of ultraviolet region and send the fluorescence of wavelength region may or the pigment of phosphorescence or the dyestuff of 400～470nm, the commercially available trade name " Hostalux KCB " having from Clariant company, trade name " OB-1 " from EASTMAN company, from the refine trade name " TBO " of company of Sumitomo, trade name " ケ イ コ mono-Le " from Japanese Ceng Da company, trade name " Kayalight " from Japanese chemical drug company, trade name " Lumogen F Blue 650 " and " Lumogen F Violet 570 " from BASF AG, trade name " FZ-2808 " from SINLOIHI company, " FZ-SB " and " FZ-5009 ", trade name " ZQ-19 " and " IPO-19 " from DayGlo company.

In addition, the luminophor as the light wavelength region at 570～700nm with the peak of luminescent spectrum, , absorb the light of ultraviolet region or visible region and send the fluorescence of wavelength region may or the pigment of phosphorescence or the dyestuff of 570～700nm, the commercially available trade name " Kayacryl Rhodamine FB " having from Japanese chemical drug company for example, trade name " Lumogen F Red 305 " from BASF AG, trade name " FZ-2803 " from SINLOIHI company, " FZ-2801 ", FZ-2817 ", " FX-301 ", " FX-303 ", " FX-307 " and " FX-327 ", trade name " NX-13 " from DayGlo company, " GPL-13 ", " Z-13 " and " IPO-13 ", trade name " Rhodamine B lake " from Zhu Mingchuan pigment company.

If the total amount of the luminophor in luminophor layer 2 is few, the luminous quantity of luminophor layer tails off, therefore more than being preferably 0.01 weight portion with respect to 100 weight portion synthetic resin, even if total amount is many, the luminous quantity of luminophor layer 2 does not change yet, sometimes according to the concentration of luminophor, dispersion degree, concentration quenching can occur, therefore with respect to 100 weight portion synthetic resin, be preferably below 65 weight portions, more preferably, below 30 weight portions, be particularly preferably below 10 weight portions.

In luminophor layer 2, can contain light reflective filling agent.As light reflective filling agent, as long as can reflected light, preferably selective light reflectivity filling agent so that form the catoptrical wavelength region may of the synthetic resin of luminophor layer and the boundary reflection of light reflective filling agent, and luminophor layer in light absorption wavelength region or the emission wavelength region overlapping of the luminophor that contains.

Like this, by making to contain light reflective filling agent in luminophor layer 2, the light that can make to incide luminophor layer 2 forming the boundary reflection of the synthetic resin of luminophor layer 2 with light reflective filling agent, make the more light quantities of luminophor absorption light and at visible region radiating light.

Especially, by selective light reflectivity filling agent so that form the catoptrical wavelength region may of the synthetic resin of luminophor layer and the boundary reflection of light reflective filling agent, and luminophor layer in the light absorption wavelength region overlapping of the luminophor that contains, the light that can make luminophor in luminophor layer effectively absorb light and radiate in a large number specific wavelength strengthens the luminous function of luminophor, can more positively change the catoptrical tone that light reflector produces.

In addition, by selective light reflectivity filling agent so that form the catoptrical wavelength region may of the synthetic resin of luminophor layer and the boundary reflection of light reflective filling agent, and luminophor layer in the emission wavelength region overlapping of the luminophor that contains, the light being radiated by luminophor can be reflected and is effectively released to outside luminophor layer by light reflective filling agent, can more positively change the catoptrical tone that light reflector produces.

As this light reflective filling agent, as long as there is light reflective, be not particularly limited, such as enumerating pellets of synthetic resins, pigment of having light reflective etc., be preferably pigment, more preferably Chinese white.

As the synthetic resin that forms above-mentioned pellets of synthetic resins, so long as there is the synthetic resin of the refractive index different from the refractive index of synthetic resin that forms luminophor layer 2, be not particularly limited, such as enumerating the polyolefin-based resins such as Low Density Polyethylene, high density polyethylene, polypropylene, cyclic polyolefin; The polyester based resins such as polyethylene terephthalate, PEN, polybutylene terephthalate, PLA; Nylon-6, nylon-6, the polyamide-based resins such as 6; The polystyrene resins such as polystyrene, ABS resin, AS resin; The polycarbonate-based resin such as polycarbonate, polyestercarbonate; The chlorine such as Polyvinylchloride, polyvinylidene chloride is resin; The thermoplastic resins such as the acrylic resin such as polymethylmethacrylate, polyethyl methacrylate.In addition, synthetic resin can be used separately, also can be used together two or more.

As above-mentioned pigment, so long as there is the pigment of the refractive index different from the refractive index of synthetic resin that forms luminophor layer 2, be not particularly limited, such as enumerating the Chinese whites such as zinc white, white lead, titania; Red lead, chrome yellow, zinc yellow, ultramarine, the inorganic pigment such as Prussian blue; Xanthene system, coumarin series, perylene system, naphthalimide system, acridine system, Sulfur prime system, diamido Stilbene system, imidazoles system, thiazole system, oxazole system, pyrazoline system, anthraquinone system, methine system, chromene system, thioindigo system, azo system, phthalocyanine system etc. have the organic pigment of pigment structure etc., are preferably the Chinese whites such as the zinc white that has high light reflective properties in absorbing wavelength region or the emission wavelength region of luminophor, white lead, titania.

As above-mentioned Chinese white, be not particularly limited, such as enumerating magnesium sulfate, magnesium carbonate, aluminium oxide, massicot, barium carbonate, barium sulphate, potassium titanate, zinc paste, zinc white, white lead, talcum, calcium carbonate, titania etc., because refractive index is high, large with the specific refractivity of synthetic resin that forms luminophor layer, be therefore preferably titania.

In addition, if the refractive index of light reflective filling agent is little with the specific refractivity of the synthetic resin of formation luminophor layer 2, light reflective filling agent can reduce with the light reflective of the interface of the synthetic resin of formation luminophor layer sometimes, is therefore preferably more than 0.05, more preferably more than 0.10.

If the content of the light reflective filling agent in luminophor layer 2 is few, the light absorption wavelength region of luminophor layer or the light reflective in emission wavelength region reduce, the amount of the light being radiated by luminophor reduces, sometimes the light reflective of light reflector can reduce, if content is many, there is light to reduce to the amount of incident of luminophor layer, or the light being radiated by luminophor is difficult to be released to the outer anxiety of luminophor layer, therefore with respect to synthetic resin 100 weight portions that form luminophor layer, be preferably 0.05～50 weight portion, 0.05～25 weight portion more preferably, be particularly preferably 0.1～10 weight portion.

In addition, as shown in Figure 3 and Figure 4, can be on a face of luminophor layer 2 the stacked integrated superficial layer 3 that has light reflective.Superficial layer 3 contains synthetic resin and light reflective filling agent, and specifically, it contains light reflective filling agent and forms in synthetic resin.

This superficial layer 3 limits by contain light reflective filling agent in synthetic resin the light quantity that incides luminophor layer 2.This is to find according to following: if the total amount of the light quantity that the luminophor containing in luminophor layer 2 absorbs (semi-invariant) reaches a certain amount of, this luminophor can inactivation, no longer bring into play luminous function.

Therefore, if the average transmittance of superficial layer 3 in the wavelength region may of 360～740nm is high, the light quantity that incides luminophor layer increases, the light quantity of the time per unit that the luminophor in luminophor layer absorbs increases, its result, the time shorten of luminophor performance luminous function, so this average transmittance is preferably below 70%, more preferably 0.05～50%, be particularly preferably 0.05～30%.In addition, the average transmittance of superficial layer 3 in the wavelength region may of 360～740nm refers to the value of measuring according to JIS Z8722.

In addition, about superficial layer 3, in order to make the luminophor in luminophor layer 2 absorb as far as possible the light being limited by superficial layer 3, or make the light that radiated by luminophor from superficial layer 3, emit to light reflector and seek to improve the light reflective of light reflector and improve the catoptrical tonal variation that light reflector produces as far as possible, preferably, the catoptrical wavelength region may of the boundary reflection of the light reflective filling agent containing in forming the synthetic resin of superficial layer 3 and above-mentioned superficial layer 3, light absorption wavelength region or emission wavelength region overlapping with the luminophor containing in luminophor layer 2.

By selective light reflectivity filling agent so that in the catoptrical wavelength region may that forms the synthetic resin of superficial layer 3 and the boundary reflection of light reflective filling agent, light absorption wavelength region overlapping with the luminophor containing in luminophor layer 2, the light that makes to incide luminophor layer 2 is not absorbed by luminophor and sees through luminophor layer 2, by reflection layer 1, reflexed to luminophor layer 2 side, and make again by luminophor, not absorbed and the light that sees through luminophor layer 2 again at superficial layer 3 to 2 reflection of luminophor layer and incide in luminophor layer 2, thereby the light that can make luminophor in luminophor layer 2 effectively absorb light and radiate a large amount of specific wavelengths strengthens the luminous function of luminophor, can improve the light reflective of light reflector and more positively change the catoptrical tone that light reflector produces.

In addition, by selective light reflectivity filling agent so that in the catoptrical wavelength region may that forms the synthetic resin of luminophor layer and the boundary reflection of light reflective filling agent, emission wavelength region overlapping with the luminophor containing in luminophor layer, thereby the light of the wavelength region may that can in inciding the light of light reflector, luminophor be radiated reflexes to outside light reflector by superficial layer, and the light being radiated by luminophor is released to outside light reflector on one side by the diffuse reflection of light reflective filling agent on one side equably, can improve the light reflective of light reflector and more really and equably change the catoptrical tone that light reflector produces.

Synthetic resin as forming superficial layer 3, is not particularly limited, such as enumerating the polyolefin-based resins such as Low Density Polyethylene, high density polyethylene, polypropylene, ethene-alpha-olefin copolymer, cyclic polyolefin; The polyester based resins such as polyethylene terephthalate, PEN, polybutylene terephthalate, PLA; Nylon-6, nylon-6, the polyamide-based resins such as 6; The polystyrene resins such as polystyrene, ABS resin, AS resin; The polycarbonate-based resin such as polycarbonate, polyestercarbonate; The chlorine such as Polyvinylchloride, polyvinylidene chloride is resin; The thermoplastic resins such as the acrylic resin such as polymethylmethacrylate, polyethyl methacrylate.In addition, synthetic resin can be used separately, also can be used together two or more.As above-mentioned alpha-olefin, such as enumerating propylene, 1-butylene, 1-amylene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-nonene, 1-decene etc.

In addition, as long as light reflective filling agent has light reflective, be not particularly limited, such as enumerating pellets of synthetic resins, pigment of having light reflective etc., be preferably pigment, more preferably Chinese white.

As the synthetic resin that forms above-mentioned pellets of synthetic resins, so long as there is the synthetic resin of the refractive index different from the refractive index of synthetic resin that forms superficial layer 3, be not particularly limited, such as enumerating the polyolefin-based resins such as Low Density Polyethylene, high density polyethylene, polypropylene, cyclic polyolefin; The polyester based resins such as polyethylene terephthalate, PEN, polybutylene terephthalate, PLA; Nylon-6, nylon-6, the polyamide-based resins such as 6; The polystyrene resins such as polystyrene, ABS resin, AS resin; The chlorine such as Polyvinylchloride, polyvinylidene chloride is resin; The thermoplastic resins such as the acrylic resin such as polymethylmethacrylate, polyethyl methacrylate.In addition, synthetic resin can be used separately, also can be used together two or more.

As above-mentioned pigment, so long as there is the pigment of the refractive index different from the refractive index of synthetic resin that forms superficial layer 3, be not particularly limited, such as enumerating the Chinese whites such as zinc white, white lead, titania; Red lead, chrome yellow, zinc yellow, ultramarine, the inorganic pigment such as Prussian blue; Xanthene system, coumarin series, perylene system, naphthalimide system, acridine system, Sulfur prime system, diamido Stilbene system, imidazoles system, thiazole system, oxazole system, pyrazoline system, anthraquinone system, methine system, chromene system, thioindigo system, azo system, phthalocyanine cording have the organic pigment of pigment structure etc., are preferably Chinese white.

As above-mentioned Chinese white, be not particularly limited, such as enumerating magnesium sulfate, magnesium carbonate, aluminium oxide, massicot, barium carbonate, barium sulphate, potassium titanate, zinc paste, zinc white, white lead, talcum, calcium carbonate, titania etc., because refractive index is high, large with the specific refractivity of synthetic resin that forms superficial layer 3, be therefore preferably titania.

In addition, if the refractive index of light reflective filling agent is little with the specific refractivity of the synthetic resin of formation superficial layer, light reflective filling agent can reduce with the light reflective of the interface of the synthetic resin of formation superficial layer sometimes, is therefore preferably more than 0.05, more preferably more than 0.10.

If the content of the light reflective filling agent in superficial layer is few, the light quantity that the light quantity that sees through superficial layer increases, the luminophor time per unit in luminophor layer absorbs increases, and the duration that the lighting time interval of luminophor shortens, change the effect of catoptrical tone by light reflector shortens; If content is many, there is light to become very few or the light that radiated by luminophor is difficult to be released to the anxiety outside light reflector by superficial layer to the amount of incident of luminophor layer, therefore with respect to synthetic resin 100 weight portions that form superficial layer 3, be preferably 0.05～50 weight portion, more preferably 0.05～25 weight portion, is particularly preferably 0.1～20 weight portion.

In reflection layer 1, luminophor layer 2 and superficial layer 3, in the scope of physical property of not damaging them, can add the adjuvants such as the stabilizing agents such as light stabilizer, ultraviolet light absorber, antioxidant, metal deactivators, antistatic agent, fire retardant.

As light stabilizer, for example can enumerate two (2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, two (N-methyl-2, 2, 6, 6-tetramethyl-4-piperidyl) sebacate, two (1, 2, 2, 6, 6-pentamethyl-4-piperidyl)-2-(3, 5-di-tert-butyl-4-hydroxyl benzyl)-2-n-butylmalonic acid ester, 1, 2, 3, 4-BTCA four (2, 2, 6, 6-tetramethyl-4-piperidyl) ester, 1, 2, 3, 4-BTCA four (1, 2, 2, 6, 6-pentamethyl-4-piperidyl) ester, 1, 2, 3, 4-BTCA (2, 2, 6, 6-tetramethyl-4-piperidyl) ester and 1, 2, 3, 4-BTCA (2, 2, 6, 6-tetramethyl-4-tridecyl) potpourri of ester, 1, 2, 3, 4-BTCA (1, 2, 2, 6, 6-pentamethyl-4-piperidyl) ester and 1, 2, 3, 4-BTCA (1, 2, 2, 6, 6-pentamethyl-4-tridecyl) potpourri of ester, 1, 2, 3, 4-BTCA { 2, 2, 6, 6-tetramethyl-4-piperidyl-3, 9-[2, 4, 8, 10-tetra-oxaspiros (5, 5) undecane] diethyl } ester and 1, 2, 3, 4,-BTCA { 2, 2, 6, 6-tetramethyl-β, β, β ', β '-tetramethyl-3, 9-[2, 4, 8, 10-tetra-oxaspiros (5, 5) undecane] diethyl } potpourri of ester, 1, 2, 3, 4-BTCA { 1, 2, 2, 6, 6-pentamethyl-4-piperidyl-3, 9-[2, 4, 8, 10-tetra-oxaspiros (5, 5) undecane] diethyl } ester and 1, 2, 3, 4-BTCA { 1, 2, 2, 6, 6-pentamethyl-β, β, β ', β '-tetramethyl-3, 9-[2, 4, 8, 10-tetra-oxaspiros (5, 5) undecane] diethyl } potpourri of ester, it is poly-that [6-(1, 1, 3, 3-tetramethyl butyl) imino group-1, 3, 5-triazine-2, 4-bis-bases], [(2, 2, 6, 6-tetramethyl-4-piperidyl) imino group] hexa-methylene [(2, 2, 6, 6-tetramethyl-4-piperidyl) imino group], 4-hydroxyl-2, 2, 6, the potpourri of 6-tetramethyl-1-piperidines ethanol and dimethyl succinate polymkeric substance, N, N ', N ", N " '-tetra-{ 4, two [butyl-(N-methyl-2 of 6-, 2, 6, 6-tetramethyl-piperidyl-4-yl) amino]-triazine-2-yl }-4, 7-diaza decane-1, 10-diamines etc., can use separately, also can be used together two or more.

If the content of the light stabilizer in reflection layer 1, luminophor layer 2 or superficial layer 3 is few, the resin that cannot suppress light reflector is deteriorated, even if this content is many, the deteriorated inhibition of resin of light reflector does not change yet, can be because light stabilizer self painted produces the harmful effects such as light reflective reduction that make light reflector, therefore with respect to synthetic resin 100 weight portions that form reflection layer 1, luminophor layer 2 or superficial layer 3, be preferably 0.01～0.8 weight portion, more preferably 0.05～0.5 weight portion.

As ultraviolet light absorber, for example can enumerate 2-(2 '-hydroxyl-5 '-aminomethyl phenyl) benzotriazole, 2-[2 '-hydroxyl-3 ', 5 '-bis-(α, α-dimethylbenzyl) phenyl]-benzotriazole, 2-(2 '-hydroxyl-3 ', 5-di-tert-butyl-phenyl)-benzotriazole, 2-(2 '-hydroxyl-3 '-tert-butyl group-5 '-aminomethyl phenyl)-5-chlorobenzotriazole, 2-(2 '-hydroxyl-3 ', 5 '-di-tert-butyl-phenyl)-5-chlorobenzotriazole, 2-(2 '-hydroxyl-3 ', 5 '-bis-tertiary pentyls) benzotriazole, 2-(2 '-hydroxyl-5 '-tertiary octyl phenyl) benzotriazole, 2, [4-(1 for 2-di-2-ethylhexylphosphine oxide, 1, 3, 3-tetramethyl butyl)-6-(2N-benzotriazole-2-yl) phenol] etc. benzotriazole be ultraviolet light absorber, 2,4-dihydroxy-benzophenone, BP-3, BP-4,2-hydroxyl-4-n-octyl-benzophenone, 2-hydroxyl-4-n-dodecane oxygen base-benzophenone, two (5-benzoyl-4-hydroxyl-2-methoxyphenyl) methane, 2,2 '-dihydroxy-4-methoxyl-benzophenone, 2,2 '-dihydroxy-4, the benzophenone series ultraviolet light absorbers such as 4 '-dimethoxy-benzophenone, the salicylates such as phenyl salicytate, salicylic acid-4-tert-butyl group phenyl ester are ultraviolet light absorber, 2-cyano group-3,3-diphenyl-ethyl acrylate, 2-cyano group-3, the cyanoacrylates such as 3 '-diphenyl-2-EHA are ultraviolet light absorber, the oxanilides such as the 2-ethoxy-3-tert-butyl group-2 '-ethyl-oxalyl diphenylamine, 2-ethoxy-2 '-ethyl-oxalyl diphenylamine are ultraviolet light absorber, 3,5-di-tert-butyl-4-hydroxybenzoic acid-2, the benzoic ethers such as 4-di-t-butyl phenyl ester are ultraviolet light absorber, 2-[4, two (2, the 4-3,5-dimethylphenyls)-1 of 6-, 3,5-triazine-2-yl]-5-hydroxyl phenol, 2-(2,4-dihydroxy phenyl)-4, two (2, the 4-3,5-dimethylphenyls)-1,3 of 6-, 5-triazine, 2, two (2-hydroxyl-4-butoxy phenyl)-6-(2,4-dibutoxy phenyl)-1 of 4-, 3, the triazines such as 5-triazine are ultraviolet light absorber etc., can use separately, also can be used together two or more.

If the content of the ultraviolet light absorber in reflection layer 1, luminophor layer 2 or superficial layer 3 is few, cannot suppress the reduction of the light reflective of light reflector, even if this content is many, the inhibition that the light reflective of light reflector reduces does not change yet, therefore with respect to synthetic resin 100 weight portions that form reflection layer 1, luminophor layer 2 or superficial layer 3, be preferably 0.01～0.8 weight portion, more preferably 0.05～0.5 weight portion.

In addition,, in the situation that have the light reflector A of superficial layer 3, in the reflectance spectrum of light reflector, the maximum light reflectance in the wavelength region may of 360～740nm is more than 100% to be preferred.By adjusting like this, can compare with incident light the light of more positively emphasizing the particular wavelength region that luminophor radiates in the reflected light of light reflector.

In addition, in the situation that there is the light reflector A of superficial layer 3, in the reflectance spectrum of light reflector, the maximum light reflectance in the wavelength region may of 360～740nm according to JIS K7350-4 in 50 ℃ of design temperatures with to set the accelerated exposure test carrying out under the condition of relative humidity 20% be more than 100% to be preferred after 100 hours.By adjusting like this, in the reflected light of light reflector, can compare chronically the light of the particular wavelength region of more emphasizing that luminophor radiates with incident light.

In addition, 50 ℃ of above-mentioned design temperatures refer to that the temperature of setting in accelerated exposure test acceleration exposing device used is 50 ℃.; accelerated exposure test acceleration exposing device used is configured to: measure atmosphere temperature higher than set temperature time, stop the heating undertaken by heater block, on the other hand; measure atmosphere temperature lower than set temperature time, start the heating of being undertaken by heater block; Accelerating mensuration atmosphere temperature in exposing device can be centered by the temperature setting and lifting.Yet the minimum temperature that is necessary to make to accelerate the mensuration atmosphere temperature in exposing device is that 45 ℃, maximum temperature are 55 ℃.

In addition, above-mentioned setting relative humidity 20% refers to that the relative humidity of setting in accelerated exposure test acceleration exposing device used is 20%.; accelerated exposure test acceleration exposing device used is configured to: the relative humidity of measuring atmosphere higher than set relative humidity time; stop the humidification being undertaken by humidifying component; on the other hand; the relative humidity of measuring atmosphere lower than set relative humidity time, start the humidification being undertaken by humidifying component; The relative humidity of accelerating the mensuration atmosphere in exposing device can be centered by the relative humidity setting and lifting.Yet the minimum relative humidity that is necessary to make to accelerate the relative humidity of the mensuration atmosphere in exposing device is 10%, the highest relative humidity is 30%.

In addition, as accelerated exposure test acceleration exposing device used, can use the Co. by Suga Test Instruments, the device that Ltd. sells on market with trade name " sunshine super-long weather meter WEL-SUN-HCB type ".

Then, the manufacture method of light reflector of the present invention is described.Manufacture method as light reflector, be not particularly limited, for example can enumerate following methods: (1) is supplied with the first extruder by the luminophor layer that contains thermoplastic resin and luminophor with thermoplastic resin composition and carried out melting mixing, on the other hand the reflection layer that contains thermoplastic resin and above-mentioned particle is supplied with to the second extruder with thermoplastic resin composition and carry out melting mixing, to connecting the first extruder, the same die head of the second extruder is supplied with luminophor layer and with thermoplastic resin composition, is carried out coextrusion with thermoplastic resin composition and reflection layer, thereby be manufactured on the method for the light reflector that on a face of the reflection layer consisting of with thermoplastic resin composition reflection layer, the stacked integrated luminophor layer consisting of with thermoplastic resin composition luminophor layer forms, (2) coating that coating contains luminophor on pre-prepd reflection layer and make that it is dry, by the luminophor folded integrated method of manufacturing light reflector layer by layer, etc..

In addition to thering is the manufacture method of the light reflector of superficial layer, describe.Manufacture method as light reflector, is not particularly limited, for example, can manufacture by following manufacture method: out manufacture reflection layer, luminophor layer and superficial layer co-extrusion (1); (2) thermoplastic resin membrane of stacked integrated formation luminophor layer, the further light reflector with light reflective of stacked integrated formation superficial layer on thermoplastic resin membrane on the light reflector with light reflective that forms reflection layer; (3) on the light reflector with light reflective that forms reflection layer, coating forms the coating that contains luminophor of luminophor layer and makes it dry, further the light reflector with light reflective of stacked integrated formation superficial layer on luminophor layer; Etc..Because thickness and the throughput rate of easy each layer of control are high, therefore preferably by the co-extrusion of above-mentioned (1), out manufacture.For example can enumerate following methods: the reflection layer that contains thermoplastic resin and above-mentioned particle is supplied to the first extruder with thermoplastic resin composition and carries out melting mixing, the luminophor layer that contains thermoplastic resin and luminophor is supplied to the second extruder with thermoplastic resin composition and carries out melting mixing, the superficial layer that contains thermoplastic resin and light reflective filling agent is supplied with to the 3rd extruder with thermoplastic resin composition and carry out melting mixing, to the same die head that connects the first～three extruder, supply with reflection layer and use thermoplastic resin composition, luminophor layer carries out coextrusion with thermoplastic resin composition and superficial layer with thermoplastic resin composition, thereby be manufactured on the stacked integrated luminophor layer being formed with thermoplastic resin composition by luminophor layer that has on a face of the reflection layer being formed with thermoplastic resin composition by reflection layer, and stacked on a face of this luminophor layer integratedly have the superficial layer consisting of with thermoplastic resin composition superficial layer and the method for the light reflector obtaining, etc..

In addition, to reflection layer by stacked integrated non-foamed sheet and foamed sheet and the manufacture method of the light reflector forming describe.Manufacture method as this light reflector, use general method, for example: the reflection layer that contains thermoplastic resin and above-mentioned particle is supplied with to the first extruder with thermoplastic resin composition and carry out melting mixing, the luminophor layer that contains thermoplastic resin and luminophor is supplied with to the second extruder with thermoplastic resin composition and carry out melting mixing, the thermoplastic resin composition of the adjuvants such as rutile titanium dioxide that contain thermoplastic resin and contain is as required supplied with to the 3rd extruder and carry out melting mixing, and carry out melting mixing and carry out producing foamed thermoplastic resin composition hot in nature to being pressed into gas-development agent in the 3rd extruder, from the first～three extruder, be extruded into interflow die head, make luminophor layer and use thermoplastic resin composition, the duplexer that reflection layer forms with this sequential cascade with thermoplastic resin composition and foaminess thermoplastic resin composition, make this duplexer from being installed on the die head extrusion foaming of the front end of interflow die head, thereby can be manufactured on the stacked integrated non-foamed sheet being formed with thermoplastic resin composition by reflection layer on a face that makes the foamed sheet that foaminess thermoplastic resin composition foaming forms, and the light reflector that the stacked integrated luminophor layer consisting of with thermoplastic resin composition luminophor layer forms on a face of the reflection layer obtaining thus.

In the situation that formed the non-foamed sheet of reflection layer by foamed sheet, to the first extruder, being pressed into gas-development agent, to make reflection layer be foaminess with thermoplastic resin composition, in this case, when forming reflection layer by one deck foamed sheet, the 3rd extruder is not connected with interflow die head.In addition, be to form on luminophor layer in the situation of superficial layer, the 4th extruder is connected with interflow die head, to the 4th extruder, supply with the superficial layer contain thermoplastic resin and light reflective filling agent and come coextrusion superficial layer with thermoplastic resin composition with thermoplastic resin composition, on luminophor layer as superficial layer and stacked integrated superficial layer with thermoplastic resin composition.As above-mentioned die head, so long as general die head in extrusion foaming is not particularly limited, for example, can enumerate T die head, annular die is first-class.

In above-mentioned manufacture method, in the situation that using T die head as die head, by by extruder extrusion foaming slabbing, can manufacture the light reflector with above-mentioned formation.

In addition, in the situation that using annular die as die head, by become the cylindric cylinder-like body of manufacturing by annular die extrusion foaming, carry out cooling this cylinder-like body is slowly supplied with to cooling axle after hole enlargement, then cylinder-like body is extruded to direction along it and between inner and outer circumferential surfaces, cut off continuously and launch, thereby can manufacture the light reflector with above-mentioned formation.

In addition, as above-mentioned gas-development agent, be not particularly limited, can enumerate the saturated aliphatic hydrocarbons such as propane, butane, pentane; The organic gas of the halogenated hydrocarbons such as HFC-134a, chlorodifluoroethane, Difluoroethane etc.; The gasiform mineral compound such as carbon dioxide, nitrogen; The mineral compound that water etc. are liquid; Potpourri as the potpourri of sodium bicarbonate and citric acid, organic acid or its salt and supercarbonate; The gas-development agents of the solid shapes such as dinitrosopentamethylene tetramine etc., preferably and with potpourri and the organic gas of organic acid or its salt and supercarbonate, more preferably and potpourri and the organic gas of use sodium bicarbonate and citric acid.

The light reflector obtaining like this contains the luminophor luminous in visible region in luminophor layer 2, luminophor is absorbed into the ultraviolet ray of the luminophor layer 2 that is mapped to light reflector or luminous ray and radiates the light in visible region with the peak of luminescent spectrum, therefore different from the catoptrical Wavelength distribution of being radiated by light reflector by the light wavelength distribution of light source radiation, can for display device, illumination etc., pay attention to aptly the purposes of tone.

In addition, at light reflector, in luminophor layer 2, contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor or in the situation that the wavelength region may of 570～700nm has any one or both in the luminophor at peak of luminescent spectrum, luminophor is absorbed into the light of the luminophor layer 2 that is mapped to light reflector, the radiation of these luminophors in the wavelength region may of 400～470nm, have luminescent spectrum peak light or in the wavelength region may of 570～700nm, there is the one or both in the light at peak of luminescent spectrum.

And, the incident light that is not absorbed by luminophor and see through luminophor layer 2 is reflexed to luminophor layer 2 side by reflection layer 1, in again by the process in luminophor layer 2, by luminophor, absorbed and radiate the light with above-mentioned that luminescent spectrum, in addition, in the light of luminophor radiation, to reflection layer 1, be sidelong the light of penetrating and also by reflection layer 1, reflexed to luminophor layer 2 side.Therefore, by the light with above-mentioned that luminescent spectrum of the luminophor radiation of luminophor layer 2 by effectively from 2 radiation of luminophor layer.

Therefore, according to light reflector A of the present invention, compare with the light that incides light reflector A, the light quantity in the wavelength region may of 400～470nm or the wavelength region may of 570～700nm is more due to the luminous function of the luminophor in luminophor layer 2 for the light being radiated by light reflector A, therefore become and allow the easier perception of human eye compare the light of the poor blue series of visibility or red colour system with the light of green system, can more appropriately for display device, illumination etc., pay attention to the purposes of tone.

Light reflector of the present invention allows the easier perception of human eye compare the light of the poor blue series of visibility or red colour system with the light of green system owing to becoming, therefore can be aptly for the display device such as liquid crystal indicator, illumination, above-mentioned this is illustrated, and it also can be for plant culture purposes.

As mentioned above, if light reflector A of the present invention is irradiated to artificial light, the sunshine of fluorescent light etc., by the effect of the luminophor that contains in luminophor layer 2, make to compare with the reflected light of light reflector reflection by existing white or silver color, the reflected light reflecting with light reflector A of the present invention in the wavelength region may of 400～470nm or the wavelength region may of 570～700nm any one or in both light quantity increase.

And, the light of the wavelength region may of 400～470nm and the wavelength region may of 570～700nm only to the effective light of the growth of plant, therefore, by light reflector of the present invention, in the situation that use the artificial light of sunshine, CCFL, fluorescent light etc. to carry out plant culture, can irradiate plant more to the effective light of the growth of plant, therefore can promote the growth of plant, in addition, the growth of plant not only can be carried out outdoor, also can carry out indoor.In addition,, in the situation that using artificial light, can also seek to save the power consumption of the light source of artificial light.

In addition, be luminophor layer 2 a face, be in the stacked integrated situation that has a superficial layer 3 of the light entrance face side of light reflector, in superficial layer 3, contain light reflective filling agent, the light quantity that incides luminophor layer 2 is restricted.Therefore, the luminous function of the luminophor containing in luminophor layer 2 can be maintained steadily in the long term, the effect of the catoptrical tone that light reflector produces can be long term maintenance changed.

In addition, be to form the catoptrical wavelength region may of the boundary reflection of the light reflective filling agent containing in the synthetic resin of superficial layer and above-mentioned superficial layer, in the situation of the light absorption wavelength region overlapping of the luminophor containing in luminophor layer, although will incide luminophor layer but do not absorbed by luminophor the light that is reflected by reflection layer and emit from luminophor layer and again incide luminophor layer by superficial layer to the reflection of luminophor layer direction, luminophor in luminophor layer is absorbed, thereby by luminophor, radiated the light of more light quantities, its result, can more positively change the catoptrical tone that light reflector produces.

In addition, be to form the catoptrical wavelength region may of the boundary reflection of the light reflective filling agent containing in the synthetic resin of superficial layer and above-mentioned superficial layer, in the situation of the emission wavelength region overlapping of the luminophor containing in luminophor layer, in inciding the light of light reflector, can the light of the wavelength region may of being radiated by luminophor be reflexed to outside light reflector by superficial layer, and by light reflective filling agent, make the light diffuse reflection of being radiated by luminophor it is released to outside light reflector equably on one side on one side, can be more really and change equably the catoptrical tone that light reflector produces.

And, by luminophor, do not absorbed the incident light that sees through luminophor layer 2 and reflexed to luminophor layer 2 side by reflection layer 1, in again by the process in luminophor layer 2, by luminophor, absorbed and luminophor at visible region radiating light, in addition, in the light radiating at luminophor, to reflection layer 1, be sidelong the light of penetrating and also by reflection layer 1, reflexed to luminophor layer 2 side.Therefore, by the light of the luminophor radiation of luminophor layer 2 by from luminophor layer 2 by superficial layer 3 lateral reflections, by superficial layer 3, effectively emitted to outside.

Therefore, according to light reflector A of the present invention, by the luminous function of the luminophor in luminophor layer 2, make the light quantity of being radiated by light reflector A in the particular wavelength region in visible region more than the light quantity that incides light reflector A, therefore can for display device, illumination etc., pay attention to aptly the purposes of tone.

Then, to having used an example of the lighting device of light reflector A of the present invention to describe.Lighting device L as shown in Figure 5, possesses light source B and the light reflector A that is arranged on the rear of this light source B.

As above-mentioned light source B, as long as can be at ultraviolet region and/or visible region radiating light, be not particularly limited, such as enumerating cold-cathode tube (CCFL), fluorescent light, light emitting diode (LED), mercury lamp, HID lamp, incandescent lamp etc., because diffusion of light performance and luminescence efficiency are excellent, thermal value is few, therefore preferred fluorescent light.In addition, light source B can be used separately, also can be used together two or more.

Fluorescent light conventionally according to color rendering, is categorized as three-wavelength type and height is drilled colour pattern, according to color (JIS standard), be categorized as white type of white type, daylight type, daytime, according to shape, be categorized as straight pipe type, ring-type type etc., lighting device L can be used the fluorescent light of any kind.

In addition, at the rear of light source B, as shown in Figure 5, for example, apart from light source B, retain predetermined distance and be provided with moulding or be deformed into the light reflector A of dome arcuation.This light reflector A absorbs a part for the light radiated by light source B, and radiation has from the light wavelength of being radiated by light source B and distributes the light of different Wavelength distribution as reflected light.

In luminophor layer 2, contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor or in the situation that the wavelength region may of 570～700nm has any one or both in the luminophor at peak of luminescent spectrum, luminophor absorbs by light source B and radiates and incide the light of the luminophor layer 2 of light reflector, these luminophors radiation in the wavelength region may of 400～470nm, have luminescent spectrum peak light or in the wavelength region may of 570～700nm, there is the one or both in the light at peak of luminescent spectrum.

And, by luminophor, do not absorbed the incident light that sees through luminophor layer 2 and reflexed to luminophor layer 2 side by reflection layer 1, in again by the process in luminophor layer 2, by luminophor, absorbed and radiate the light with above-mentioned that luminescent spectrum, in addition, in the light of luminophor radiation, to reflection layer 1, be sidelong the light of penetrating and also by reflection layer 1, reflexed to luminophor layer 2 side.Therefore, by the light with above-mentioned that luminescent spectrum of the luminophor radiation of luminophor layer 2 by effectively from 2 radiation of luminophor layer.

Therefore, according to lighting device L of the present invention, the light that radiates with by light source B and incide light reflector A is compared, the light quantity in the wavelength region may of 400～470nm or the wavelength region may of 570～700nm is more due to the luminous function of the luminophor in luminophor layer 2 for the light being radiated by light reflector A, therefore become and allow the easier perception of human eye compare the light of the poor blue series of visibility or red colour system with the light of green system, can be aptly for paying attention to the purposes of tone.

As one of purposes of above-mentioned attention tone, such as using above-mentioned lighting device in being arranged on the lighting use that the article that configure on the store shelf in snacks shop etc. irradiate.In addition, as article, be not particularly limited, such as enumerating food, clothing, objects made from precious metals etc.

For example, the luminophor containing in luminophor layer 2 is when having the luminophor at peak of luminescent spectrum in the wavelength region may of 400～470nm, the light of the blue series of the light being radiated by lighting device emphasized, can make to be configured in the state that article on store shelf look like the tone that approaches blue series.

In addition, the luminophor containing in luminophor layer 2 is when having the luminophor at peak of luminescent spectrum in the wavelength region may of 570～700nm, the light of the red colour system of the light being radiated by lighting device emphasized, can make to be configured in the state that article on store shelf look like the tone that approaches red colour system.

Like this, by lighting device of the present invention, the article that are configured on store shelf are irradiated, thereby can make article look like the state of the tone that approaches blue series or red colour system and improve commodity value.

For example, be to dispose on store shelf in the situation of cold drink, by making luminophor layer 2 contain the luminophor in the wavelength region may of 400～470nm with the peak of luminescent spectrum, can make cold drink look like the state of the tone that approaches blue series, further give the refrigerant sense of beverage and seek the sales promotion of beverage.

In addition, be to dispose on store shelf in the situation of hot drink, by making luminophor layer 2 contain the luminophor in the wavelength region may of 570～700nm with the peak of luminescent spectrum, can make hot drink look like the state of the tone that approaches red colour system, further give the impression that beverage is warm and seek the sales promotion of beverage.

The light reflector A using in lighting device L of the present invention allows the easier perception of human eye compare the light of the poor blue series of visibility or red colour system with the light of green system owing to becoming, therefore can be aptly for paying attention to the purposes of tone, above-mentioned this is illustrated, and it also can be aptly for plant culture purposes.

As mentioned above, if the light source B by lighting device L of the present invention irradiates light to light reflector A, by the effect of the luminophor that contains in luminophor layer 2, make to compare with the reflected light of light reflector reflection by existing white or silver color, the reflected light reflecting with light reflector A in the wavelength region may of 400～470nm or the wavelength region may of 570～700nm any one or in both light quantity increase.

And, the light of the wavelength region may of 400～470nm and the wavelength region may of 570～700nm only to the effective light of the growth of plant, therefore, by lighting device L of the present invention, in the situation that use artificial light, the particularly fluorescent light of cold-cathode tube (CCFL), fluorescent light etc. to carry out plant culture, can be more to the effective light of the growth of plant to plant irradiation, therefore can seek to promote the growth of plant.In addition, using artificial light, particularly fluorescent light in the situation that, the power consumption that can also seek to save light source.

As mentioned above, in the situation that lighting device L of the present invention is used for plant culture, for example, as shown in Figure 6, in the place ahead of the light source B of lighting device L, retain predetermined distance water is set and plant the cultivation rack for plant C such as cultivating stand, soil cultivation frame, the plant of cultivating is irradiated to the reflected light being radiated by light reflector A in cultivation rack for plant C.

In addition, in the situation that use fluorescent light as the light source of lighting device L, by fluorescent light to whole directions with radial radiating light, the light of this radiation is reflected in by light reflector A diffusion, therefore the plant of cultivating is roughly irradiated to required light equably in the cultivation rack for plant C in the place ahead that is arranged on light source B, can stablize and the cultivating stand C that cultivates plants reliably in plant.

In addition, in the plant culture of Fig. 6, use in lighting device L, between light reflector A and cultivation rack for plant C, be formed with space, the reflected light that light reflector A reflects can be irradiated to the part except cultivation rack for plant C, and cultivation of plants efficiency sometimes can reduce.

In this case, as shown in Figure 7, the plant culture of take is the first light reflector A with the light reflector A that is shaped to dome arcuation in lighting device L, at the two ends of this first light reflector A, be, between crooked end A1, the A1 of light reflector A and cultivation rack for plant C, the second light reflector D is set, with the second light reflector D, make to be reflected to cultivation rack for plant C direction by the reflected light of the first light reflector A radiation, the light that can make the first light reflector A reflect is irradiated to the plant of cultivating in cultivation rack for plant C effectively, makes the cultivation of plant more reliable.

And the light that the second light reflector D reflects is further by the second light reflector D diffusion, thereby can more evenly and positively to the plant of cultivating, irradiate required light in cultivation rack for plant C.

Above-mentioned the second light reflector D can be used the light reflector of the formation identical with the first light reflector A, or also can use the light reflector of the formation different from the first light reflector A, the second light reflector D is also preferably similarly configured to from the first light reflector A: radiation and the light wavelength of being radiated by light source B distribute the light of different Wavelength distribution as reflected light.

the effect of invention

Light reflector of the present invention has above-mentioned formation, therefore can emphasize the wavelength region may different from light by light source radiation light, form the tone that existing white and silver color reflecting plate are failed to show, the stage effect of performance illumination, is used in the purposes such as the attention tones such as lighting use of the article on being disposed at store shelf aptly.

In addition, the luminophor layer of light reflector contain wavelength region may at 400～470nm have luminescent spectrum peak luminophor or in the situation that the wavelength region may of 570～700nm has any one or both in the luminophor at peak of luminescent spectrum, the light of the wavelength region may (red colour system) of the wavelength region may of catoptrical 400～470nm (blue series) or 570～700nm emphasized, can use human eye to be difficult to the easy perception that becomes of the blueness of perception or redness.Pass through light reflector, can make illumination, display device, and the tone of the object being irradiated by their form existing white and silver color reflecting plate thing not: titania=30 % by weight: 70 % by weight) and as the foaming body layer of the sodium bicarbonate of frothing agent and 1.4 weight portion potpourris of citric acid supply with the 3rd extruder with thermoplastic resin composition, carry out melting mixing, by the first～three extruder, luminophor layer is used to thermoplastic resin composition, reflection layer is extruded into interflow die head with thermoplastic resin composition and foaming body layer with thermoplastic resin composition, formation is by foaminess resin bed, the duplexer that non-foaminess resin bed and luminous resin layer form, wherein, foaminess resin bed consists of with thermoplastic resin composition foaming body layer, cross section is circular, non-foaminess resin bed is layered in the outside surface of this foaminess resin bed and consists of with thermoplastic resin composition reflection layer, cross section is circular, luminous resin is stacked in layer by layer the outside surface of this non-foaminess resin bed and consists of with thermoplastic resin composition luminophor layer, cross section is circular, this duplexer is supplied with to the annular die being connected with interflow die head, by annular die extrusion foaming, become cylindric and obtain cylindric foaming body.

Then, cylindric foaming body is being supplied with to cooling axle after hole enlargement gradually, and an edge forming is cooling on one side, then cylindric foaming body is extruded to direction on 2 relative edges radially and between inner and outer circumferential surfaces, cuts off continuously, thereby by its incision expansion, obtaining global density is 0.7g/cm ³the light reflector of sheet.

In addition, light reflector consists of reflection layer 1 and luminophor layer 2, reflection layer 1 is that the non-foamed sheet 1a that the stacked integrated thickness consisting of non-foaminess resin bed is 0.15mm on a face that makes the foamed sheet 1b that thickness that foaminess resin bed foaming forms is 0.5mm forms, luminophor layer 2 be on the non-foamed sheet 1a of this reflection layer 1 stacked integrated and by luminous resin layer, formed, thickness is 0.05mm.

(embodiment 2)

As luminophor, replace fluorescent dye, use 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-301 "), in addition obtain similarly to Example 1 light reflector.

(embodiment 3)

As luminophor, replace fluorescent dye, the tone that uses 1 weight portion fluorescent pigment to show, can pay attention to the purposes of tone aptly for display device, lighting use etc.

In addition, for above-mentioned light reflector, compare with incident light, reflected light is to the effective wavelength region may of the growth of plant, light quantity increases in the one or both in the wavelength region may of 400～470nm or the wavelength region may of 570～700nm.Therefore,, by above-mentioned light reflector, can seek to promote with sunshine, artificial light the cultivation of plant.

And, use the lighting device of above-mentioned light reflector without the power consumption that increases light source, therefore the heat that can seek energy-saving and can suppress to be shed by light source and easily control the temperature of the nurturing an environment of plant, can be more really and effectively carry out plant culture.

In addition, in above-mentioned light reflector, in the situation that thering is superficial layer, the light quantity that incides luminophor layer is restricted, luminophor in luminophor layer can not absorbed over required light, make the luminous function long term maintenance of luminophor, making to maintain steadily in the long term the effect that changes the catoptrical tone that light reflector produces becomes possibility.

Accompanying drawing explanation

Fig. 1 is the longitudinal section that light reflector of the present invention is shown.

Fig. 2 is the longitudinal section that another example of light reflector of the present invention is shown.

Fig. 3 is the longitudinal section that another example of light reflector of the present invention is shown.

Fig. 4 is the longitudinal section that another example of light reflector of the present invention is shown.

Fig. 5 is the diagrammatic side view that lighting device of the present invention is shown.

Fig. 6 illustrates the diagrammatic side view of lighting device for plant culture of the present invention.

Fig. 7 illustrates the diagrammatic side view of another example of lighting device for plant culture of the present invention.

Fig. 8 is the diagrammatic side view that the lighting device of making in embodiment is shown.

Fig. 9 is the chart of reflectance spectrum that the light reflector of embodiment 1,5,7 and comparative example 1 is shown.

Figure 10 is the chart of reflectance spectrum that the light reflector of embodiment 16～18 and comparative example 3 is shown.

Figure 11 is the chart of reflectance spectrum that the light reflecting board of embodiment 21,33,34 is shown.

Figure 12 is the chart of reflectance spectrum that the light reflecting board of embodiment 29,35,36 is shown.

Figure 13 is the chart of the variation of maximum light reflectance that light reflecting board the is shown variation of following the light reflective filling dose in the luminophor layer of light reflecting board.

Figure 14 is the chart of the variation of maximum light reflectance that light reflecting board the is shown variation of following the light reflective filling dose in the luminophor layer of light reflecting board.

Figure 15 is the chart of the variation of maximum light reflectance that light reflecting board the is shown variation of following the light reflective filling dose in the luminophor layer of light reflecting board.

Figure 16 is the chart of the variation of maximum light reflectance that light reflecting board the is shown variation of following the light reflective filling dose in the luminophor layer of light reflecting board.

Figure 17 is the chart of the reflectance spectrum of the light reflecting board before and after the accelerated exposure test illustrating in embodiment 55.

Figure 18 is the chart of the reflectance spectrum of the light reflecting board before and after the accelerated exposure test illustrating in embodiment 56.

Figure 19 is the chart of the reflectance spectrum of the light reflecting board before and after the accelerated exposure test illustrating in embodiment 57.

Figure 20 is the chart of the reflectance spectrum of the light reflecting board before and after the accelerated exposure test illustrating in embodiment 67.

Figure 21 is the chart of the reflectance spectrum of the light reflecting board before and after the accelerated exposure test illustrating in embodiment 68.

description of reference numerals

1 reflection layer

2 luminophor layers

3 superficial layers

A light reflector, the first light reflector

A1 crooked end

B light source

C cultivation rack for plant

D the second light reflector

L lighting device, plant culture lighting device

Embodiment

Below enumerate embodiment embodiments of the present invention are described in detail, but the present invention is not merely defined in these embodiment.

(embodiment 1)

To contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A ") and with thermoplastic resin composition, supply with the first extruder as the luminophor layer of the 0.1 weight portion fluorescent dye (manufacturer of the Clariant company name of an article " Hostalux KCB ") of luminophor, to contain masterbatch (the TOYO INK CO. that 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A ") and 100 weight portions make to include in Ethylene-Propylene Block Copolymer rutile titanium dioxide, LTD. manufacturer's name of an article " PPM 1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: titania=30 % by weight: reflection layer 70 % by weight) is supplied with the second extruder with thermoplastic resin composition, to contain 24 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A "), 76 weight portion polypropylene (Japan Polypropylene Corporation manufacturer's name of an article " FB3312 "), 25 weight portions make to include in Ethylene-Propylene Block Copolymer masterbatch (the TOYO INK CO. of rutile titanium dioxide, LTD. manufacturer's name of an article " PPM 1KB662 WHT FD ", ethylene-propylene block copolymerization (manufacturer of the SINLOIHI company name of an article " FX-303 "), in addition obtain similarly to Example 1 light reflector.

(embodiment 4)

As luminophor, replace fluorescent dye, use 65 weight portion fluorescent pigments (manufacturer of the SINLOIHI company name of an article " FX-303 "), in addition obtain similarly to Example 1 light reflector.

(embodiment 5)

As luminophor, replace fluorescent dye, use 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-307 "), in addition obtain similarly to Example 1 light reflector.

(embodiment 6)

As luminophor, replace fluorescent dye, use 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-327 "), in addition obtain similarly to Example 1 light reflector.

(embodiment 7)

As luminophor, replace using separately fluorescent dye, and with 0.1 weight portion fluorescent dye (manufacturer of the Clariant company name of an article " Hostalux KCB ") and 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-307 "), in addition obtain similarly to Example 1 light reflector.

(embodiment 8)

As luminophor, replace using separately fluorescent dye, and with 0.1 weight portion fluorescent dye (manufacturer of the Clariant company name of an article " Hostalux KCB ") and 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-327 "), in addition obtain similarly to Example 1 light reflector.

(embodiment 9)

To contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A ") and with thermoplastic resin composition, supply with the first extruder as the luminophor layer of the 0.1 weight portion fluorescent dye (manufacturer of the Clariant company name of an article " Hostalux KCB ") of luminophor, to contain masterbatch (the TOYO INK CO. that 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A ") and 100 weight portions make to include in Ethylene-Propylene Block Copolymer rutile titanium dioxide, LTD. manufacturer's name of an article " PPM 1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: titania=30 % by weight: reflection layer 70 % by weight) is supplied with the second extruder with thermoplastic resin composition, carry out melting mixing, by first, the second extruder is extruded into interflow die head with thermoplastic resin composition and reflection layer with thermoplastic resin composition by luminophor layer, be formed on the laminates that on the non-foaminess resin bed consisting of with thermoplastic resin composition reflection layer, the stacked luminous resin layer consisting of with thermoplastic resin composition luminophor layer forms, this laminates is supplied with to the T die head being connected with interflow die head, by T die head co-extrusion modling, becoming global density is 1.3g/cm ³light reflector.In addition, so that the mode that the thickness of light reflector is 0.2mm draw.

In addition, light reflector consists of reflection layer 1 and luminophor layer 2, reflection layer 1 is by being that non-foaminess resin bed forms, thickness is 0.15mm, luminophor layer 2 on this reflection layer 1 stacked integrated and by luminous resin layer form, thickness is 0.05mm.

(embodiment 10)

As luminophor, replace fluorescent dye, use 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-301 "), in addition obtain similarly to Example 9 light reflector.

(embodiment 11)

As luminophor, replace fluorescent dye, use 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-303 "), in addition obtain similarly to Example 9 light reflector.

(embodiment 12)

As luminophor, replace fluorescent dye, use 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-307 "), in addition obtain similarly to Example 9 light reflector.

(embodiment 13)

As luminophor, replace fluorescent dye, use 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-327 "), in addition obtain similarly to Example 9 light reflector.

(embodiment 14)

As luminophor, replace using separately fluorescent dye, and with 0.1 weight portion fluorescent dye (manufacturer of the Clariant company name of an article " Hostalux KCB ") and 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-307 "), in addition obtain similarly to Example 9 light reflector.

(embodiment 15)

As luminophor, replace using separately fluorescent dye, and with 0.1 weight portion fluorescent dye (manufacturer of the Clariant company name of an article " Hostalux KCB ") and 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-327 "), in addition obtain similarly to Example 9 light reflector.

(comparative example 1)

Do not use luminophor, in addition obtain similarly to Example 1 light reflector.

(comparative example 2)

Do not use luminophor, in addition obtain similarly to Example 9 light reflector.

(embodiment 16)

By main points similarly to Example 1, obtain the light reflector of sheet.The light reflector severing of gained sheet is become to the planar rectangular shape of minor face 50cm * length limit 120cm.On the other hand, preparation is shaped to the support component E made of iron of dome arcuation along whole long side direction, on one side make light reflector be deformed into dome arcuation and carry out the stacked integrated light reflector A (with reference to Fig. 8) that manufactures dome arcuation to form the mode one edge support component E of the state that exposes its luminophor layer 2 at the inner surface of this support component E.

Then, in the place ahead of the luminophor layer 2 of light reflector A, fluorescent light B is set, at the socket (not shown) being installed on support component, is electrically connected to fluorescent light B, thereby make lighting device L.Then, water is set plants cultivating stand and uses for plant culture in the place ahead of lighting device L.

(embodiment 17)

As luminophor, replace fluorescent dye, use 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-307 "), in addition make similarly to Example 16 lighting device L.Then, water is set plants cultivating stand and uses for plant culture in the place ahead of lighting device L.

(embodiment 18)

As luminophor, replace using separately fluorescent dye, and with 0.1 weight portion fluorescent dye (manufacturer of the Clariant company name of an article " Hostalux KCB ") and 1 weight portion fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-307 "), in addition make similarly to Example 16 lighting device L.Then, water is set plants cultivating stand and uses for plant culture in the place ahead of lighting device L.

(comparative example 3)

Do not use luminophor, in addition make similarly to Example 16 lighting device L.

For gained light reflector and lighting device, by following main points, measure light reflectance, the results are shown in table 1 and Fig. 9,10.Fig. 9 only illustrates the result of embodiment 1,5,7 and comparative example 1.Figure 10 only illustrates the result of embodiment 16,17,18 and comparative example 3.In addition, by following main points, measure the light total reflectivity of reflection layer of gained light reflector and the average transmittance of the wavelength region may of 360～740nm, the results are shown in table 1.

(light reflectance)

The mensuration of the light reflectance of light reflector is used spectrocolorimeter (Konica Minolta Holdings, Inc. manufacturer's name of an article " CM-2600d "), according to JISZ8722, in the room temperature of measuring atmosphere, be 20 ℃, measure under the condition that the relative humidity of atmosphere is 60%, in the wavelength region may of 360～740nm, every 10nm, measure the light reflectance of light reflector.

For gained light reflectance, in the wavelength region may of 400～470nm and the wavelength region may of 570～700nm, obtain maximum light reflectance, in the wavelength region may of 470～570nm, obtain minimum light reflectance.

Calculate the difference Δ of the minimum light reflectance in the wavelength region may of maximum light reflectance in the wavelength region may of 400～470nm and 470～570nm ₁, and calculate the difference Δ of the minimum light reflectance in the wavelength region may of maximum light reflectance in the wavelength region may of 570～700nm and 470～570nm ₂.

(average transmittance of the light total reflectivity of reflection layer and the wavelength region may of 360～740nm)

Extrusion molding and the reflection layer of light reflector have the test film of identical formation and same thickness.The mensuration of the light total reflectivity of gained test film is used spectrocolorimeter (Konica Minolta Holdings, Inc. manufacturer's name of an article " CM-2600d "), according to JIS Z8722, in the temperature of measuring atmosphere, be under 20 ℃, the relative humidity condition that is 60%, in the wavelength region may of 360～740nm every the light reflectance of 10nm determination test sheet.For gained light reflectance, obtain the arithmetic mean of light reflectance of the wavelength region may of 360～740nm, as the light total reflectivity of reflection layer.

In addition, the mensuration of the transmittance of gained test film is used spectrophotometer (manufacturer of Shimadzu Seisakusho Ltd. name of an article " UV-2450 "), according to JIS Z8722, in the temperature of measuring atmosphere, be under 20 ℃, the relative humidity condition that is 60%, in the wavelength region may of 360～740nm every the transmittance of 1nm determination test sheet.For gained transmittance, obtain the arithmetic mean of transmittance of the wavelength region may of 360～740nm, as the average transmittance of reflection layer.

Table 1

(embodiment 19～36)

To contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A ", refractive index: 1.48), fluorescent dye (Ciba Specialty Chemicals Inc. manufacturer's name of an article " OB ") or fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-327 ") as the ormal weight shown in the table 2 of luminophor, rutile titanium dioxide (refractive index: luminophor layer 2.71) is supplied with the first extruder with thermoplastic resin composition with the ormal weight shown in table 2, to contain masterbatch (the TOYO INK CO. that 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A ") and 100 weight portions make to include in Ethylene-Propylene Block Copolymer rutile titanium dioxide, LTD. manufacturer's name of an article " PPM 1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: titania=30 % by weight: reflection layer 70 % by weight) is supplied with the second extruder with thermoplastic resin composition, to contain 25 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A "), 75 weight portion polypropylene (Japan Polypropylene Corporation manufacturer's name of an article " FB3312 "), 20 weight portions make to include in Ethylene-Propylene Block Copolymer masterbatch (the TOYO INK CO. of rutile titanium dioxide, LTD. manufacturer's name of an article " PPM 1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: titania=30 % by weight: 70 % by weight) and as the foaming body layer of the sodium bicarbonate of frothing agent and 1.4 weight portion potpourris of citric acid supply with the 3rd extruder with thermoplastic resin composition, carry out melting mixing, by the first～three extruder, luminophor layer is used to thermoplastic resin composition, reflection layer is extruded into interflow die head with thermoplastic resin composition and foaming body layer with thermoplastic resin composition, formation is by foaminess resin bed, the duplexer that non-foaminess resin bed and luminous resin layer form, wherein, foaminess resin bed consists of with thermoplastic resin composition foaming body layer, cross section is circular, non-foaminess resin bed is layered in the outside surface of this foaminess resin bed and consists of with thermoplastic resin composition reflection layer, cross section is circular, luminous resin is stacked in layer by layer the outside surface of this non-foaminess resin bed and consists of with thermoplastic resin composition luminophor layer, cross section is circular, this duplexer is supplied with to the annular die being connected with interflow die head, by annular die extrusion foaming, become cylindric and obtain cylindric foaming body.

Then, cylindric foaming body is being supplied with to cooling axle after hole enlargement gradually, and an edge forming is cooling on one side, then cylindric foaming body is extruded to direction on 2 relative edges radially and between inner and outer circumferential surfaces, cuts off continuously, thereby by its incision expansion, obtaining global density is 0.7g/cm ³light reflector.

In addition, light reflector consists of reflection layer 1 and luminophor layer 2, reflection layer 1 is that the non-foamed sheet 1a that the stacked integrated thickness consisting of non-foaminess resin bed is 0.15mm on a face that makes the foamed sheet 1b that thickness that foaminess resin bed foaming forms is 0.5mm forms, luminophor layer 2 be on the non-foamed sheet 1a of this reflection layer 1 stacked integrated and by luminous resin layer, formed, thickness is 0.05mm.

Fluorescent dye (Ciba Specialty Chemicals Inc. manufacturer's name of an article " OB ") absorbs the light of ultraviolet region, at 400～500nm, has emission wavelength region.Fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-327 ") absorbs the light of visible region, at 570～710nm, has emission wavelength region.In luminophor layer 2, in the catoptrical reflection wavelength region of the boundary reflection of polypropylene and rutile titanium dioxide, be 380～780nm.

(embodiment 37～54)

To contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A ", refractive index: 1.48), fluorescent dye (Ciba Specialty Chemicals Inc. manufacturer's name of an article " OB ") or fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-327 ") as the ormal weight shown in the table 2 of luminophor, rutile titanium dioxide (refractive index: luminophor layer 2.71) is supplied with the first extruder with thermoplastic resin composition with the ormal weight shown in table 2, to contain masterbatch (the TOYO INK CO. that 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A ") and 100 weight portions make to include in Ethylene-Propylene Block Copolymer rutile titanium dioxide, LTD. manufacturer's name of an article " PPM 1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: titania=30 % by weight: reflection layer 70 % by weight) is supplied with the second extruder with thermoplastic resin composition, carry out melting mixing, by first, the second extruder is extruded into interflow die head with thermoplastic resin composition and reflection layer with thermoplastic resin composition by luminophor layer, be formed on the laminates that on the non-foaminess resin bed consisting of with thermoplastic resin composition reflection layer, the stacked luminous resin layer consisting of with thermoplastic resin composition luminophor layer forms, this laminates is supplied with to the T die head being connected with interflow die head, by T die head co-extrusion modling, becoming global density is 1.3g/cm ³light reflector.In addition, so that the mode that the thickness of light reflector is 0.2mm draw.

In addition, light reflector consists of reflection layer 1 and luminophor layer 2, reflection layer 1 by non-foaminess resin bed form, thickness is 0.15mm, luminophor layer 2 on this reflection layer 1 stacked integrated and by luminous resin layer form, thickness is 0.05mm.

For gained light reflector, by following main points, measure light reflectance and maximum light reflectance, the results are shown in table 2 and Figure 11～16.In addition,, by measuring the light total reflectivity of reflection layer of gained light reflector and the average transmittance of the wavelength region may of 360～740nm with above-mentioned same main points, the results are shown in table 2.

In addition, Figure 11 shows the reflectance spectrum of embodiment 21,33,34.Figure 12 shows the reflectance spectrum of embodiment 29,35,36.Figure 13 shows the result that the maximum light reflectance of embodiment 19～25,33,34 is obtained with respect to the addition mapping of rutile titanium dioxide.Figure 14 shows the result that the maximum light reflectance of embodiment 26～32,35,36 is obtained with respect to the addition mapping of rutile titanium dioxide.Figure 15 shows the result that the maximum light reflectance of embodiment 37～43,51,52 is obtained with respect to the addition mapping of rutile titanium dioxide.Figure 16 shows the result that the maximum light reflectance of embodiment 44～50,53,54 is obtained with respect to the addition mapping of rutile titanium dioxide.

(light reflectance)

The mensuration of the light reflectance of light reflector is used spectrocolorimeter (Konica Minolta Holdings, Inc. manufacturer's name of an article " CM-2600d "), according to JISZ8722, in the room temperature of measuring atmosphere, be 20 ℃, measure under the condition that the relative humidity of atmosphere is 60%, in the wavelength region may of 360～740nm, every 10nm, measure the light reflectance of light reflector.

For gained light reflectance, in the wavelength region may of 360～740nm, obtain maximum light reflectance.

Table 2

(embodiment 55)

To contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A "), 100 weight portions make to include in Ethylene-Propylene Block Copolymer masterbatch (the TOYO INK CO. of rutile titanium dioxide, LTD. manufacturer's name of an article " PPM1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: rutile titanium dioxide=30 % by weight: 70 % by weight), the reflection layer of 0.2 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.2 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB119 ") is supplied with the first extruder with thermoplastic resin composition and is carried out melting mixing, to contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A "), 1 weight portion luminophor (manufacturer of the fluorescent pigment SINLOIHI company name of an article " FX-303 "), the luminophor layer of 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB119 ") is supplied with the second extruder with thermoplastic resin composition and is carried out melting mixing, to contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A ", refractive index: 1.48), 1 weight portion is as the rutile titanium dioxide (refractive index: 2.71) of light reflective filling agent, the superficial layer of 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB 119 ") is supplied with the 3rd extruder with thermoplastic resin composition and is carried out melting mixing, to the interflow die head that connects the first～three extruder, supply with reflection layer and use thermoplastic resin composition, luminophor layer is used thermoplastic resin composition with thermoplastic resin composition and superficial layer, by the T die head coextrusion being connected with interflow die head, thereby manufacture by reflection layer 1, the light reflector that luminophor layer 2 and superficial layer 3 form, wherein, reflection layer 1 consists of with thermoplastic resin composition reflection layer, luminophor layer 2 is stacked integrated and consist of with thermoplastic resin composition luminophor layer on a face of this reflection layer 1, superficial layer 3 is stacked integrated and consist of with thermoplastic resin composition superficial layer on a face of this luminophor layer 2.

In addition, the integral thickness of light reflector is that 0.25mm, density are 1.3g/cm ³, the thickness of reflection layer 1 is 0.15mm, and the thickness of luminophor layer 2 is 0.05mm, and the thickness of superficial layer 3 is 0.05mm.

Fluorescent pigment (manufacturer of the SINLOIHI company name of an article " FX-303 ") absorbs the light of visible region, at 570～710nm, has emission wavelength region.In superficial layer 3, in the catoptrical reflection wavelength region of the boundary reflection of polypropylene and rutile titanium dioxide, be 380～780nm.

(embodiment 56)

Replace 1 weight portion, making superficial layer is 8 weight portions by the rutile titanium dioxide amount in thermoplastic resin composition, in addition similarly manufactures light reflector with embodiment 55.

(embodiment 57)

Replace 1 weight portion, making superficial layer is 16 weight portions by the rutile titanium dioxide amount in thermoplastic resin composition, in addition similarly manufactures light reflector with embodiment 55.

(embodiment 58)

To contain 25 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A "), 75 weight portion polypropylene (Japan Polypropylene Corporation manufacturer's name of an article " FB3312 "), 25 weight portions make to include in Ethylene-Propylene Block Copolymer masterbatch (the TOYO INK CO. of rutile titanium dioxide, LTD. manufacturer's name of an article " PPM 1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: rutile titanium dioxide=30 % by weight: 70 % by weight), 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 "), 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB 119 ") and supply with the first extruder as the foaminess thermoplastic resin composition of the sodium bicarbonate of gas-development agent and 1.4 weight portion potpourris of citric acid and carry out melting mixing, to contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A "), 1 weight portion luminophor (manufacturer of the fluorescent pigment SINLOIHI company name of an article " FX-303 "), the luminophor layer of 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB119 ") is supplied with the second extruder with thermoplastic resin composition and is carried out melting mixing, to contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A "), the 1 weight portion rutile titanium dioxide as light reflective filling agent, the superficial layer of 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB 119 ") is supplied with the 3rd extruder with thermoplastic resin composition and is carried out melting mixing, be extruded into the interflow die head that connects the first～three extruder, formation outside-in stacks gradually superficial layer and uses thermoplastic resin composition, the cylindric duplexer that luminophor layer forms with thermoplastic resin composition and foaminess thermoplastic resin composition, make this cylindric duplexer manufacture cylinder-like body by the annular die extrusion foaming that is installed on the front end of interflow die head, after this cylinder-like body is expanded gradually, supplying with cooling axle carries out cooling, then cylinder-like body is extruded to direction along it cuts off its incision expansion continuously between inner and outer circumferential surfaces, thereby manufacture by reflection layer 1, the light reflector that luminophor layer 2 and superficial layer 3 form, wherein, the foamed sheet that reflection layer 1 obtains by making foaminess thermoplastic resin composition foaming forms, luminophor layer 2 is stacked integrated and consist of with thermoplastic resin composition luminophor layer on a face of this reflection layer 1, superficial layer 3 is stacked integrated and consist of with thermoplastic resin composition superficial layer on a face of this luminophor layer 2.

In addition, the integral thickness of light reflector is 0.6mm, and density is 0.6g/cm ³, the thickness of reflection layer 1 is 0.5mm, and the thickness of luminophor layer 2 is 0.05mm, and the thickness of superficial layer 3 is 0.05mm.

(embodiment 59)

Replace 1 weight portion, making superficial layer is 8 weight portions by the rutile titanium dioxide amount in thermoplastic resin composition, in addition similarly manufactures light reflector with embodiment 58.

(embodiment 60)

Replace 1 weight portion, making superficial layer is 16 weight portions by the rutile titanium dioxide amount in thermoplastic resin composition, in addition similarly manufactures light reflector with embodiment 58.

(embodiment 61)

To contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A "), 100 weight portions make to include in Ethylene-Propylene Block Copolymer masterbatch (the TOYO INK CO. of rutile titanium dioxide, LTD. manufacturer's name of an article " PPM1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: titania=30 % by weight: 70 % by weight), the reflection layer of 0.2 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.2 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB119 ") is supplied with the first extruder with thermoplastic resin composition and is carried out melting mixing, to contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A "), 1 weight portion luminophor (manufacturer of the fluorescent pigment SINLOIHI company name of an article " FX-303 "), the luminophor layer of 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB119 ") is supplied with the second extruder with thermoplastic resin composition and is carried out melting mixing, to contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A "), the 1 weight portion rutile titanium dioxide as light reflective filling agent, the superficial layer of 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB 119 ") is supplied with the 3rd extruder with thermoplastic resin composition and is carried out melting mixing, to contain 50 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A "), 50 weight portion polypropylene (Japan Polypropylene Corporation manufacturer's name of an article " FB3312 "), 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 "), 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB 119 ") and supply with the 4th extruder as the foaminess thermoplastic resin composition of the sodium bicarbonate of gas-development agent and 1 weight portion potpourri of citric acid and carry out melting mixing, be extruded into the interflow die head that connects the first～four extruder, formation outside-in stacks gradually superficial layer and uses thermoplastic resin composition, luminophor layer is used thermoplastic resin composition, the cylindric duplexer that reflection layer forms with thermoplastic resin composition and foaminess thermoplastic resin composition, make this cylindric duplexer manufacture cylinder-like body by the annular die extrusion foaming that is installed on the front end of interflow die head, after this cylinder-like body is expanded gradually, supplying with cooling axle carries out cooling, then cylinder-like body is extruded to direction along it cuts off continuously by its incision expansion between inner and outer circumferential surfaces, thereby manufacture by reflection layer 1, the light reflector that luminophor layer 2 and superficial layer 3 and foaming body layer 4 form, wherein, reflection layer 1 consists of with thermoplastic resin composition reflection layer, luminophor layer 2 is stacked integrated and consist of with thermoplastic resin composition luminophor layer on a face of this reflection layer 1, superficial layer 3 is stacked integrated and consist of with thermoplastic resin composition superficial layer on a face of above-mentioned luminophor layer 2, foaming body layer 4 is stacked integrated and foaminess thermoplastic resin composition foaming is formed on another face of above-mentioned reflection layer.

In addition, the integral thickness of light reflector is 0.65mm, and density is 0.7g/cm ³, the thickness of reflection layer 1 is 0.15mm, and the thickness of luminophor layer 2 is 0.05mm, and the thickness of superficial layer 3 is 0.05mm, and the thickness of foaming body layer is 0.4mm.

(embodiment 62)

Replace 1 weight portion, making superficial layer is 8 weight portions by the rutile titanium dioxide amount in thermoplastic resin composition, in addition similarly manufactures light reflector with embodiment 61.

(embodiment 63)

Replace 1 weight portion, making superficial layer is 16 weight portions by the rutile titanium dioxide amount in thermoplastic resin composition, in addition similarly manufactures light reflector with embodiment 61.

(embodiment 64)

To contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A "), 100 weight portions make to include in Ethylene-Propylene Block Copolymer masterbatch (the TOYO INK CO. of rutile titanium dioxide, LTD. manufacturer's name of an article " PPM1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: titania=30 % by weight: 70 % by weight), the reflection layer of 0.2 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.2 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB119 ") is supplied with the first extruder with thermoplastic resin composition and is carried out melting mixing, to contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL500A "), 1 weight portion luminophor (manufacturer of the fluorescent pigment SINLOIHI company name of an article " FX-303 "), the luminophor layer of 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB119 ") is supplied with the second extruder with thermoplastic resin composition and is carried out melting mixing, to contain 100 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A "), the 1 weight portion rutile titanium dioxide as light reflective filling agent, the superficial layer of 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 ") and 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB 119 ") is supplied with the 3rd extruder with thermoplastic resin composition and is carried out melting mixing, to contain 25 weight portion polypropylene (the SunAllomer Ltd. manufacturer name of an article " PL 500A "), 75 weight portion polypropylene (Japan Polypropylene Corporation manufacturer's name of an article " FB3312 "), 25 weight portions make to include in Ethylene-Propylene Block Copolymer masterbatch (the TOYO INK CO. of rutile titanium dioxide, LTD. manufacturer's name of an article " PPM1KB662 WHT FD ", Ethylene-Propylene Block Copolymer: rutile titanium dioxide=30 % by weight: 70 % by weight), 0.1 weight portion ultraviolet light absorber (Ciba Specialty Chemicals Inc. manufacturer's name of an article " Tinuvin 234 "), 0.1 weight portion light stabilizer (Ciba Specialty Chemicals Inc. manufacturer's name of an article " CHIMASSORB 119 ") and supply with the 4th extruder as the foaminess thermoplastic resin composition of the sodium bicarbonate of gas-development agent and 1.4 weight portion potpourris of citric acid and carry out melting mixing, be extruded into the interflow die head that connects the first～four extruder, formation outside-in stacks gradually superficial layer and uses thermoplastic resin composition, luminophor layer is used thermoplastic resin composition, the cylindric duplexer that reflection layer forms with thermoplastic resin composition and foaminess thermoplastic resin composition, make this cylindric duplexer manufacture cylinder-like body by the annular die extrusion foaming that is installed on the front end of interflow die head, after this cylinder-like body is expanded gradually, supplying with cooling axle carries out cooling, then cylinder-like body is extruded to direction along it cuts off continuously by its incision expansion between inner and outer circumferential surfaces, thereby manufacture by reflection layer 1, the light reflector that luminophor layer 2 and superficial layer 3 form, wherein, reflection layer 1 comprises makes foamed sheet 1b that foaminess thermoplastic resin composition foaming forms and the stacked integrated and non-foamed sheet 1a that consists of with thermoplastic resin composition reflection layer on a face of this foamed sheet 1b, luminophor layer 2 is stacked integrated and consist of with thermoplastic resin composition luminophor layer on a face of this reflection layer 1, superficial layer 3 is stacked integrated and consist of with thermoplastic resin composition superficial layer on a face of this luminophor layer 2.

In addition, the integral thickness of light reflector is 0.75mm, and density is 0.7g/cm ³, the thickness that forms the non-foamed sheet 1a of reflection layer 1 is that the thickness of 0.15mm and foamed sheet 1b is 0.5mm, and the thickness of luminophor layer 2 is 0.05mm, and the thickness of superficial layer 3 is 0.05mm.

(embodiment 65)

Replace 1 weight portion, making superficial layer is 8 weight portions by the rutile titanium dioxide amount in thermoplastic resin composition, in addition similarly manufactures light reflector with embodiment 64.

(embodiment 66)

Replace 1 weight portion, making superficial layer is 16 weight portions by the rutile titanium dioxide amount in thermoplastic resin composition, in addition similarly manufactures light reflector with embodiment 64.

(embodiment 67)

On the die head of interflow, do not connect the 3rd extruder, do not form superficial layer, in addition similarly obtain light reflector with embodiment 55.

(embodiment 68)

Do not make superficial layer with containing rutile titanium dioxide in thermoplastic resin composition, in addition similarly manufacture light reflector with embodiment 55.

(embodiment 69)

On the die head of interflow, do not connect the 3rd extruder, do not form superficial layer, in addition similarly manufacture light reflector with embodiment 58.

(embodiment 70)

Do not make superficial layer with containing rutile titanium dioxide in thermoplastic resin composition, in addition similarly manufacture light reflector with embodiment 58.

(embodiment 71)

On the die head of interflow, do not connect the 3rd extruder, do not form superficial layer, in addition similarly manufacture light reflector with embodiment 61.

(embodiment 72)

Do not make superficial layer with containing rutile titanium dioxide in thermoplastic resin composition, in addition similarly manufacture light reflector with embodiment 61.

(embodiment 73)

On the die head of interflow, do not connect the 3rd extruder, do not form superficial layer, in addition similarly obtain light reflector with embodiment 64.

(embodiment 74)

Do not make superficial layer with containing rutile titanium dioxide in thermoplastic resin composition, in addition similarly manufacture light reflector with embodiment 64.

For gained light reflector, by following main points, measure the average transmittance in the wavelength region may of 360～740nm of light reflectance, maximum light reflectance and superficial layer, the results are shown in table 3,4 and Figure 17～21.In table 3,4, recorded the total content of the titania containing in reflection layer.For gained light reflector, the average transmittance by with the above-mentioned same main points mensuration light total reflectivity of reflection layer and the wavelength region may of 360～740nm, the results are shown in table 3,4.

In addition, Figure 17 shows the reflectance spectrum of the accelerated exposure test front and back of embodiment 55.Figure 18 shows the reflectance spectrum of the accelerated exposure test front and back of embodiment 56.Figure 19 shows the reflectance spectrum of the accelerated exposure test front and back of embodiment 57.Figure 20 shows the reflectance spectrum of the accelerated exposure test front and back of embodiment 67.Figure 21 shows the reflectance spectrum of the accelerated exposure test front and back of embodiment 68.

(average transmittance of superficial layer)

Extrusion molding and the superficial layer of light reflector have the test film of identical formation and same thickness.The mensuration of the transmittance of gained test film is used spectrophotometer (manufacturer of Shimadzu Seisakusho Ltd. name of an article " UV-2450 "), according to JIS Z8722, in the temperature of measuring atmosphere, be under 20 ℃, the relative humidity condition that is 60%, in the wavelength region may of 360～740nm every the transmittance of 1nm determination test sheet.For gained transmittance, obtain the arithmetic mean of transmittance of the wavelength region may of 360～740nm, as the average transmittance of superficial layer.

(light reflectance)

The mensuration of the light reflectance of light reflector is used spectrocolorimeter (Konica Minolta Holdings, Inc. manufacturer's name of an article " CM-2600d "), according to JISZ8722, in the room temperature of measuring atmosphere, be 20 ℃, measure under the condition that the relative humidity of atmosphere is 60%, in the wavelength region may of 360～740nm, every 10nm, measure the light reflectance of light reflector.

For gained light reflectance, in the wavelength region may of 360～740nm, obtain maximum light reflectance, result is recorded in to table 3, " before accelerated exposure test " hurdle of 4.

In addition, use accelerated exposure test machine (Suga Test Instruments Co., Ltd. the design temperature that manufacturer's name of an article " Sunshine Super Long Life Weather Meter WEL-SUN-HCB type ") is adjusted to test flume according to JIS K7350-4 is 50 ℃, sets the condition that relative humidity is 20%, and the light that the superficial layer of light reflector is irradiated to 100 hours carbon arc lamps carries out accelerated exposure test.In addition, for the light reflector of embodiment 67,69,71,73, luminophor layer is irradiated to light.

Then, for the light reflector after accelerated exposure test, by main points same as described above, obtain the maximum light reflectance in the wavelength region may of 360～740nm, result is recorded in to table 3, " after accelerated exposure test " hurdle of 4.

utilizability in industry

The present invention emphasizes the light of the wavelength region may different from light by light source radiation, such as can be aptly for being configured in the lighting use of the article on store shelf, the purposes of display device etc. are paid attention to the purposes of tone.

Claims (25)

1. a light reflector, it is characterized in that, its radiation has from light wavelength by light source radiation and distributes the light of different Wavelength distribution as reflected light, described light reflector has reflection layer and luminophor layer, this luminophor layer is stacked integrated and contain the luminophor luminous in visible region on the first surface of described reflection layer, the described luminophor luminous in visible region contains the luminophor in the wavelength region may of 400～470nm with the peak of luminescent spectrum, there are both in the luminophor at peak of luminescent spectrum with wavelength region may at 570～700nm, described luminophor layer contains 100 weight portion synthetic resin, the luminophor that 0.1～10 weight portion light reflective filling agent and 0.01～10 weight portion are luminous in visible region, and then, light absorption wavelength region or the emission wavelength region overlapping of the luminophor containing in forming the catoptrical wavelength region may of the synthetic resin of luminophor layer and the boundary reflection of light reflective filling agent and luminophor layer, and then, in the reflectance spectrum of light reflector, if the difference of the minimum light reflectance in the wavelength region may of the maximum light reflectance in the wavelength region may of 400～470nm and 470～570nm is Δ 1, when if the difference of the minimum light reflectance in the wavelength region may of the maximum light reflectance in the wavelength region may of 570～700nm and 470～570nm is Δ 2, both in Δ 1 and Δ 2 are more than 1%.

2. light reflector according to claim 1, is characterized in that, light reflector absorbs by the light of light source radiation radiofluorescence or phosphorescence.

3. light reflector according to claim 2, is characterized in that, the luminophor luminous in visible region sends the pigment of fluorescence or phosphorescence for absorbing the light of ultraviolet region or visible region.

4. light reflector according to claim 2, is characterized in that, the luminophor luminous in visible region sends the dyestuff of fluorescence or phosphorescence for absorbing the light of ultraviolet region or visible region.

5. light reflector according to claim 1, it is characterized in that, in the reflectance spectrum of light reflector, both in the maximum light reflectance in the maximum light reflectance in the wavelength region may of 400～470nm and the wavelength region may of 570～700nm surpass 100%.

6. light reflector according to claim 1, is characterized in that, the refractive index of synthetic resin and the specific refractivity of light reflective filling agent that form luminophor layer are more than 0.05.

7. light reflector according to claim 1, is characterized in that, light reflective filling agent is Chinese white.

8. light reflector according to claim 1, is characterized in that, in the reflectance spectrum of light reflector, the maximum light reflectance in the wavelength region may of 360～740nm is more than 100%.

9. light reflector according to claim 1, is characterized in that, has the stacked integrated and superficial layer that contains synthetic resin and light reflective filling agent on luminophor layer.

10. light reflector according to claim 9, it is characterized in that light absorption wavelength region or the emission wavelength region overlapping of the luminophor containing in the catoptrical wavelength region may of the boundary reflection of the light reflective filling agent containing and luminophor layer in forming the synthetic resin of superficial layer and described superficial layer.

11. light reflectors according to claim 9, is characterized in that, in the reflectance spectrum of light reflector, the maximum light reflectance in the wavelength region may of 360～740nm is more than 100%.

12. light reflectors according to claim 9, it is characterized in that, in the reflectance spectrum of light reflector, the maximum light reflectance in the wavelength region may of 360～740nm is more than 100% after 100 hours at the accelerated exposure test carrying out under the condition of temperature 50 C and relative humidity 20% according to JISK7350-4.

13. light reflectors according to claim 9, is characterized in that, the specific refractivity of the light reflective filling agent containing in the refractive index of the synthetic resin of formation superficial layer and described superficial layer is more than 0.05.

14. light reflectors according to claim 9, is characterized in that, in superficial layer, with respect to 100 weight portion synthetic resin, contain 0.05～50 weight portion light reflective filling agent.

15. light reflectors according to claim 9, is characterized in that, the average transmittance of superficial layer in the wavelength region may of 360～740nm is below 70%.

16. light reflectors according to claim 1, is characterized in that, reflection layer is formed by foaming body.

17. light reflectors according to claim 1, is characterized in that, a part for reflection layer is formed by foaming body.

18. light reflectors according to claim 1, is characterized in that, the stacked integrated foaming body layer that has on second of reflection layer.

19. light reflectors according to claim 1, is characterized in that, it is for plant culture.

20. 1 kinds of lighting devices, is characterized in that, it possesses light source and light reflector claimed in claim 1.

21. lighting devices according to claim 20, is characterized in that, light source is fluorescent light.

22. lighting devices according to claim 20, is characterized in that, it is the article on store shelf for illumination configuration.

23. 1 kinds of plant culture lighting devices, is characterized in that, it possesses light source and light reflector claimed in claim 1.

24. 1 kinds of plant culture lighting devices, the cultivation rack for plant that it possesses light source and light reflector claimed in claim 1 and is arranged on the place ahead of described light source.

25. plant culture lighting devices according to claim 24, it is characterized in that, light reflector possess to be bent to circular-arc state be arranged on light source rear the first light reflector and be arranged on the crooked end of this first light reflector and the second light reflector between cultivation rack for plant.