JPH07170865A - Wavelength conversion material - Google Patents
Wavelength conversion materialInfo
- Publication number
- JPH07170865A JPH07170865A JP5344406A JP34440693A JPH07170865A JP H07170865 A JPH07170865 A JP H07170865A JP 5344406 A JP5344406 A JP 5344406A JP 34440693 A JP34440693 A JP 34440693A JP H07170865 A JPH07170865 A JP H07170865A
- Authority
- JP
- Japan
- Prior art keywords
- light
- emission
- fluorescent dye
- wavelength conversion
- conversion material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Landscapes
- Protection Of Plants (AREA)
- Greenhouses (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は太陽光および植物工場等
で用いる人工光源の光スペクトルを植物生育を促進する
ために有効な光に変換する機能を持った積層フィルムか
らなる農業用波長変換資材に関する。FIELD OF THE INVENTION The present invention relates to an agricultural wavelength conversion material comprising a laminated film having a function of converting the light spectrum of sunlight and an artificial light source used in a plant factory into light effective for promoting plant growth. Regarding
【0002】[0002]
【従来の技術】近年ハウス又はトンネル内で有用植物を
栽培する施設園芸が広く行なわれるようになり、露地栽
培と比較すると収穫量、品質ともに飛躍的に向上するた
め野菜、果物の安定供給上重要な役割を担いつつある。
施設栽培の意義の最大のものはハウス、トンネル内の保
温であり、更に雨、風、虫等の害から植物を防護するこ
とであるが、このため野菜などは季節栽培から周年栽
培、ナシ、ミカン、ブドウ、カキ、リンゴなどの果樹で
は糖度の高い形の良い実が収穫される様になって来てい
る。一方、施設園芸が広く行なわれる様になってから、
更に増収、又、高品質を指向して、太陽光のスペクトル
を植物の光合成、或いは成長活物質の生産のために有利
な形にして変換する試み、即ち、施設園芸に用いられる
合成樹脂フィルムに波長変換機能を有する蛍光性化合物
を溶解することにより植物にとって或る場合には有害で
ある近紫外線を吸収して光合成に有用に使われる青色系
の光に変換したり、光合成作用効率の低い緑色〜黄色系
の光を、より長波長の橙色〜赤色系の光に変換する試み
が多数為されている。2. Description of the Related Art In recent years, institutional horticulture for cultivating useful plants in greenhouses or tunnels has become widespread, and compared to open-field cultivation, the yield and quality are dramatically improved, which is important for a stable supply of vegetables and fruits. Is playing a different role.
The greatest significance of institutional cultivation is to keep the heat inside the house and tunnel, and to protect the plants from damages such as rain, wind, insects, etc. Therefore, for vegetables, seasonal cultivation to year-round cultivation, pear, Fruit trees such as mandarin oranges, grapes, oysters, and apples are beginning to be harvested in good shape with high sugar content. On the other hand, after gardening became widely practiced,
Attempts to increase the yield and to improve the quality of sunlight, and to convert the spectrum of sunlight into an advantageous form for photosynthesis of plants or production of growth active materials, that is, to a synthetic resin film used for institutional horticulture. By dissolving a fluorescent compound that has a wavelength conversion function, it absorbs near-ultraviolet light, which is harmful to plants in some cases, and converts it into blue light that is useful for photosynthesis, or green with low photosynthetic efficiency. -Many attempts have been made to convert yellowish light into orange-redish light having a longer wavelength.
【0003】例えば研究法人「農業の光線選択利用技術
研究組合」(昭和39〜57年)の研究成果報告書「施
設農業における光質利用の技術化に関する総合研究」
(1976年2月、農林水産技術会議事務局)において
塩化ビニルに青蛍光物質、赤蛍光物質、およびそれらを
同時に溶解したフィルムの試作を行なったが耐光性が悪
く栽培試験を実施するに到らないまま中断したことが報
告されている。特公昭49−16301 、特開昭52−94345 、
特開平2−102265、特開平2−147651、特開平3−2110
53では、近紫外光を光合成有効光に変換する色素として
フルオレツセントブライトナー、シンチレーターなどが
提案されているが耐光性が十分でなく、施設園芸用に実
用化されるに到っていない。特開昭54−127945ではロー
ダミン6Gを用いて緑色〜黄色光を橙色〜赤色光に変換
するフィルムが開示されているがこの色素も耐光性が悪
く適切な光安定化処理を行なわない限りこのままでは実
用に耐えないものである。For example, a research result report of the research corporation "Agricultural light ray selective utilization technology research association" (Showa 39-57) "Comprehensive research on technicalization of utilization of light quality in facility agriculture"
(February 1976, Secretariat of the Agriculture, Forestry and Fisheries Technology Council) made a trial film of a blue fluorescent substance, a red fluorescent substance, and a film in which they were simultaneously dissolved in vinyl chloride, but the light resistance was poor and a cultivation test was conducted. It has been reported that it was suspended without it. JP-B-49-16301, JP-A-52-94345,
JP-A-2-102265, JP-A-2-147651, JP-A-3-2110
In 53, fluorescent brighteners, scintillators, etc. are proposed as dyes for converting near-ultraviolet light into photosynthetic effective light, but their light resistance is insufficient and they have not been put to practical use for institutional horticulture. Japanese Unexamined Patent Publication (Kokai) No. 54-127945 discloses a film for converting green to yellow light into orange to red light by using Rhodamine 6G. However, this dye also has poor light resistance and is left as it is unless proper light stabilization treatment is carried out. It cannot be put to practical use.
【0004】特開昭57−189 にはポリエステル、ポリア
ミド、ポリカーボネート、ポリアクリレート、ポリスチ
レン、ポリスルフオンなどの溶解性パラメータが9以上
の重合体にアントラキノン系蛍光体、チオインジゴ系蛍
光体、ペリノン系蛍光体、ペリレン系蛍光体などから選
ばれた複数の有機蛍光体が溶解された波長変換可能な成
形体が開示されている。複数の有機蛍光体は短波長側の
光を吸収して励起された第1の蛍光体から、より励起エ
ネルギーの小さい第2の蛍光体へ無輻射的にエネルギー
移動する様に、即ち第1の蛍光体の発光スペクトルと第
2の蛍光体の吸収スペクトルが部分的に重複する様に組
み合わされているため広範囲の短波長側の光を一層長波
長側の光へ変換することが出来るものであり植物栽培上
の一定の効果が期待できるものである。しかし当発明思
想は赤色光のみを植物栽培上の有効光とみなし、変換さ
れる短波長側の光の波長領域に配慮をしないものであ
り、青色光を利用するクロロフイルa、b、カロチン類
の作用が阻害されるマイナスの効果をも有するものであ
る。JP-A-57-189 discloses polymers such as polyesters, polyamides, polycarbonates, polyacrylates, polystyrenes and polysulfones having solubility parameters of 9 or more, anthraquinone type phosphors, thioindigo type phosphors, perinone type phosphors, A wavelength-convertable molded body in which a plurality of organic phosphors selected from perylene-based phosphors and the like are dissolved is disclosed. The plurality of organic phosphors absorbs light on the short wavelength side so as to transfer energy from the first phosphor excited to the second phosphor having a smaller excitation energy in a non-radiative manner, that is, the first phosphor. Since the emission spectrum of the fluorescent substance and the absorption spectrum of the second fluorescent substance are combined so as to partially overlap each other, it is possible to convert light in the short wavelength side of a wide range into light in the longer wavelength side. A certain effect on plant cultivation can be expected. However, the idea of the present invention considers only red light as effective light for plant cultivation, and does not consider the wavelength region of light on the short wavelength side to be converted, and the chlorophyll a, b, and carotene of blue light are used. It also has a negative effect of inhibiting the action.
【0005】このほか赤発光フィルムであるラジアント
ピンク(商品名;三井東圧化学(株))、Irradiant 66
0 (商品名;BASF社)が上市され栽培試験が行なわ
れたが単一の波長領域の光を変換するこれらの波長変換
フィルムは一般に作用効果が十分でなく特定の気象条件
では有効であっても別の気象条件では効果が見られない
と言ったケースが多く発生し、実用の施設園芸用資材と
して用いるには信頼性に欠けるものであった。Radiant pink (trade name; Mitsui Toatsu Chemicals, Inc.), which is a red light emitting film, Irradiant 66
0 (Brand name; BASF) was put on the market and cultivation tests were conducted, but these wavelength conversion films that convert light in a single wavelength region are generally not sufficiently effective and effective under specific weather conditions. However, there were many cases where the effect was not seen under other weather conditions, and it was unreliable to use as a practical material for gardening.
【0006】[0006]
【発明が解決しようとする課題】本発明はこの様な状況
にあって有用作物の施設栽培において太陽光または人工
光源の光のスペクトルを変換し作物の生育を促進する耐
光性に優れた農業用波長変換資材を提供することを目的
とするものである。SUMMARY OF THE INVENTION The present invention, in such a situation, transforms the spectrum of sunlight or the light of an artificial light source in facility cultivation of useful crops and promotes the growth of crops for agricultural use having excellent light resistance. The purpose is to provide a wavelength conversion material.
【0007】作物の生育を制御する光受容体には主とし
てクロロフィルa、b、フィトクロムI型、II型、I
II型およびフラビン色素かカロチノイドのどちらかあ
るいは両方が働いていると言われる青色光受容色素があ
ることが知られている。フィトクロムI型、II型、I
II型、青色光受容色素の働きは種々研究されているが
(例えば「農業における光応用技術」第44巻,第4
号,406 ページ,応用物理(1975年) 及び「フィトクロ
ムとジベレリン」vol.24,No. 2,105 ページ,植物
の化学調節(1989年)等にはフィトクロムが図1に示す
ように、2つの吸収型を持ち、光形態形成反応上、植物
生育に促進的に働くPfr型はPr型とr光(670nm
を中心とする光)とfr光(725nmを中心とする光)
によって相互に光変換することが記載されている。)、
未だ完全に解明されておらず、作物に対してどの様な光
スペクトルを与えるのが好ましいかについては現時点で
は予測することが出来ない。The photoreceptors that control the growth of crops are mainly chlorophyll a, b, phytochrome type I, type II, and I.
It is known that there are blue light receiving dyes that are said to be working with either type II and flavin dyes or carotenoids, or both. Phytochrome type I, type II, I
The functions of type II and blue light-receiving dyes have been studied variously (for example, "Light Application Technology in Agriculture" Vol. 44, No. 4).
No. 2, p. 406, Applied Physics (1975) and "Phytochrome and Gibberellin" vol.24, No. 2, 105, Chemical regulation of plants (1989). Pfr type, which has absorption type and promotes plant growth in photomorphogenic reaction, is Pr type and r light (670 nm
Centered light) and fr light (light centered at 725 nm)
It is described that they mutually perform optical conversion. ),
It has not been fully clarified yet, and it is not possible to predict what kind of light spectrum should be given to crops at this time.
【0008】[0008]
【課題を解決するための手段】本発明は蛍光色素を含有
する積層フィルムからなる農業用波長変換資材であり、
例えば吸収極大が350 〜450 nm、好ましくは370 〜430
nmにあり、発光極大が380 〜520 nm、好ましくは400 〜
460 nmにある少くとも1つの蛍光色素(A)と吸収極大
が460 〜580 nm、好ましくはは480 〜550 nmにあり、発
光極大が540 〜800 nm、好ましくは570 〜700 nmにある
少くとも1つの蛍光色素(B)が含有されており、
(A)の発光スペクトルと、(B)の吸収スペクトルが
部分的に重複する様な組み合わせであり、(A)の発光
強度(I)と、(A)の励起エネルギーの一部が(B)
の発光位置で発光する強度(I’)の比(I)/
(I’)が0.2以上5以下である積層フィルムからな
る農業用波長変換資材である。本発明の農業用波長変換
資材の変換機能を更に詳しく述べると蛍光色素(A)が
主として近紫外光を一部は青色光に、一部は蛍光色素
(B)を介するエネルギー移動によって橙色〜赤色光に
変換すると共に蛍光色素(B)が緑色光領域の光を橙色
〜赤色光に変換する結果、本発明の波長変換資材に照射
された光スペクトルは近紫外光領域と緑色光領域が減光
され、青色光領域と橙色〜赤色光領域が増光されたスペ
クトルを持って透過する。青色光領域の光は、植物に存
在する青色光を利用するクロロフィルa、b、カロチン
類の作用を阻害しないためには、(A)の発光強度
(I)と、(A)の励起エネルギーの一部が(B)の発
光位置で発光する強度(I’)の比(I)/(I’)が
0.2以上5以下、好ましくは0.4以上3以下である
のがよい。The present invention is an agricultural wavelength conversion material comprising a laminated film containing a fluorescent dye,
For example, the absorption maximum is 350 to 450 nm, preferably 370 to 430.
the emission maximum is 380-520 nm, preferably 400-520 nm.
At least one fluorescent dye (A) at 460 nm and an absorption maximum at 460 to 580 nm, preferably 480 to 550 nm, and an emission maximum at 540 to 800 nm, preferably 570 to 700 nm Contains one fluorescent dye (B),
It is a combination in which the emission spectrum of (A) and the absorption spectrum of (B) partially overlap, and the emission intensity (I) of (A) and a part of the excitation energy of (A) are (B).
Ratio (I) / intensity (I ') emitted at the light emission position of
The wavelength conversion material for agriculture comprises a laminated film having (I ′) of 0.2 or more and 5 or less. The conversion function of the wavelength conversion material for agriculture of the present invention will be described in more detail. The fluorescent dye (A) mainly emits near-ultraviolet light in part to blue light and part in orange to red due to energy transfer through the fluorescent dye (B). As a result of conversion into light and the fluorescent dye (B) converting light in the green light region into orange to red light, the light spectrum applied to the wavelength conversion material of the present invention is dimmed in the near ultraviolet light region and the green light region. The blue light region and the orange to red light region are transmitted with the increased spectrum. The light in the blue light region does not interfere with the actions of chlorophyll a, b, and carotene that utilize blue light existing in plants, in order to prevent the action of the emission intensity (I) of (A) and the excitation energy of (A). It is preferable that the ratio (I) / (I ′) of the intensity (I ′) of which part of the light is emitted at the emission position of (B) is 0.2 or more and 5 or less, preferably 0.4 or more and 3 or less.
【0009】蛍光色素(A)および蛍光色素(B)のス
トークスシフト(吸収極大波長と発光極大波長の差)は
或る程度大きくないと植物生育に対する波長変換の有効
性が減少し、少なくとも20nm以上のストークスシフト
が有効であり、特に蛍光色素(B)のストークスシフト
はもっと大きい方が好ましい。20nm以下の場合は波長
変換が行なわれても植物生育に促進的に作用を及ぼすこ
とが少ない。If the Stokes shift (difference between the absorption maximum wavelength and the emission maximum wavelength) of the fluorescent dye (A) and the fluorescent dye (B) is not large to some extent, the efficiency of wavelength conversion for plant growth decreases, and at least 20 nm or more. Is more effective, and it is particularly preferable that the Stokes shift of the fluorescent dye (B) is larger. When it is 20 nm or less, even if wavelength conversion is performed, it rarely exerts an accelerating effect on plant growth.
【0010】蛍光色素(A)は例えばPTP、アントラ
セン、9,10−ジフェニルアントラセンなどのポリフ
ェニル系、BPA、DPS、スチルベン1、スチルベン
3などのスチルベン系、1,4−ジスチリルベンゼンな
どのスチリルベンゼン系、popop ,Dimethylpopop 、P
BOなどのオキサゾール系、PBDなどのオキサジアゾ
ール系、クマリン4,151,307,311,DMA
Cなどのクマリン系、ミカホワイトATN、4−アミノ
ナフタル酸フェニルイミドなどのナフタルイミド系、CI
Vat Blue 19、20、22などのアントラキノン系、ルミノ
ール Red Violet 440PT 、1,5−ジフェニル−3−ス
チリル−2−ピラゾリンなどのピラゾリン系、2,5−
ジヒドロキシ−テレフタル酸エチル、2,5−ジヒドロ
キシ−4−メトキシカルボニル安息香酸エチルなどのジ
ヒドロキシテレフタレート系、特願平3−242321及び特
願平4−301673に記載されるシアノピラジン誘導体など
が挙げられる。The fluorescent dye (A) is, for example, polyphenyl type such as PTP, anthracene and 9,10-diphenylanthracene, stilbene type such as BPA, DPS, stilbene 1 and stilbene 3 and styryl such as 1,4-distyrylbenzene. Benzene-based, popop, Dimethylpopop, P
Oxazoles such as BO, Oxadiazoles such as PBD, Coumarin 4,151,307,311, DMA
C, coumarin type, Mica White ATN, 4-aminonaphthalic acid phenylimide, naphthalimide type, CI
Vat Blue 19, 20, 22 and other anthraquinone series, Luminol Red Violet 440PT, 1,5-diphenyl-3-styryl-2-pyrazoline and other pyrazoline series 2,5-
Examples thereof include dihydroxy terephthalate compounds such as ethyl dihydroxy-terephthalate and ethyl 2,5-dihydroxy-4-methoxycarbonylbenzoate, and cyanopyrazine derivatives described in Japanese Patent Application Nos. 3-242321 and 4-301673.
【0011】蛍光色素(B)は例えばルモゲンF Red 30
0 などのペリレン系、ルミノール Red Violet 635Pなど
のアントラキノン系、チオインジゴ Bright Pink G、チ
オインジゴ Scarlet Rなどのチオインジゴ系、ルミノー
ル Bright Orange 575PT、The fluorescent dye (B) is, for example, Lumogen F Red 30.
Perylene series such as 0, anthraquinone series such as Luminol Red Violet 635P, thioindigo series such as thioindigo Bright Pink G, thioindigo Scarlet R, Luminol Bright Orange 575PT,
【0012】[0012]
【化1】 などのナフタル酸系、ローダミン、アクリジン Redなど
のキサンテン系、[Chemical 1] Naphthalic acid type such as, xanthene type such as Rhodamine, Acridine Red,
【0013】[0013]
【化2】 などのクマリン系、[Chemical 2] Coumarin type,
【0014】[0014]
【化3】 などのナフトイレン系、[Chemical 3] Such as naphtholine,
【0015】特願平3−242321、特願平4−301673及び
特願平5−276220に記載されるシアノピラジン誘導体、
特願平4−89563 に記載されるベンゾプテリジン誘導体
などが挙げられる。これらの中で、ルモゲンF Red 300
、特願平3−242321及び特願平4−301673に記載され
るシアノピラジン誘導体、特願平4−89563 に記載され
るベンゾプテリジン誘導体などは、樹脂中でストークス
シフトが40以上と大きく好ましい例である。尚、特願
平3−242321及び特願平4−301673に記載されるシアノ
ピラジン誘導体、特願平4−89563 に記載されるベンゾ
プテリジン誘導体はストークスシフトが50以上と大き
く特に好ましい。一般に短波長光を吸収する蛍光色素1
と長波長光を吸収する蛍光色素2が混合、溶解されてお
り、1の発光スペクトルと2の吸収スペクトルの一部が
重複する本発明の様な系においては蛍光色素1の光安定
性が著しく向上することが知られており、従って本発明
の蛍光色素(A)は単独では使用出来ない不安定なもの
も使用可能となる。一方蛍光色素(B)はそれ自体、光
安定なものか、紫外線吸収剤、酸化防止剤、一重項酸素
クエンチヤーなどの添加剤、その他の光安定化処理によ
って安定化される程度の安定性を持つものでなければな
らない。Cyanopyrazine derivatives described in Japanese Patent Application No. 3-242321, Japanese Patent Application No. 4-301673 and Japanese Patent Application No. 5-276220,
Examples thereof include benzopteridine derivatives described in Japanese Patent Application No. 4-89563. Among these, Lumogen F Red 300
The cyanopyrazine derivatives described in Japanese Patent Application Nos. 3-242321 and 4-301673, and the benzopteridine derivatives described in Japanese Patent Application No. 4-89563 have a Stokes shift of 40 or more in the resin, which are preferable examples. Is. The cyanopyrazine derivatives described in Japanese Patent Application Nos. 3-242321 and 4-301673 and the benzopteridine derivatives described in Japanese Patent Application No. 4-89563 have a Stokes shift of 50 or more and are particularly preferable. Fluorescent dyes that generally absorb short wavelength light 1
And the fluorescent dye 2 which absorbs long-wavelength light are mixed and dissolved, and the light stability of the fluorescent dye 1 is remarkably high in a system such as the present invention in which the emission spectrum of 1 partially overlaps with the absorption spectrum of 2. It is known that the fluorescent dye (A) is improved, and therefore, the fluorescent dye (A) of the present invention can also be used as an unstable dye which cannot be used alone. On the other hand, the fluorescent dye (B) itself is photostable, or has stability such that it is stabilized by an ultraviolet absorber, an antioxidant, an additive such as a singlet oxygen quencher, and other photostabilization treatment. Must be one.
【0016】具体的には400 nm以下の近紫外光を吸収す
るUVカットフィルムの内側に本発明の波長変換フィル
ムを設置し、太陽光を1年間照射したのちの蛍光色素
(A)および蛍光色素(B)の発光強度の保持率は少な
くとも50%あることが好ましく、これより保持率が低
いと、波長変換の効果を再現性良く引き出すことが難し
い。Specifically, the wavelength conversion film of the present invention is installed inside a UV cut film that absorbs near-ultraviolet light having a wavelength of 400 nm or less, and the fluorescent dye (A) and the fluorescent dye after irradiation with sunlight for 1 year The retention rate of the emission intensity of (B) is preferably at least 50%. If the retention rate is lower than this, it is difficult to bring out the wavelength conversion effect with good reproducibility.
【0017】本発明の材料は例えば、PVC;ポリエチ
レン;ポリプロピレン;ポリビニルアルコール;ポリメ
チルアクリレート;ポリメチルメタクリレート;ポリ塩
化ビニリデン;ポリアクリルニトリル;ポリブタジエ
ン;ポリスチレン;エチレン−メチルメタクリレート共
重合体;エチレン−酢酸ビニル共重合体;塩化ビニル−
酢酸ビニル共重合体などの共重合体;ポリビニルブチラ
ール;ポリビニルホルマール;PET,PBTなどのポ
リエステル;ポリアリレート;ポリカーボネート;ポリ
エステルカーボネート;フェノキシ樹脂;ナイロン6,
ナイロン6/6,ナイロン11,ナイロン12,MXD
6ナイロンなどのポリアミド;ポリジメチルシロキサ
ン;ポリトリメチルシリルプロピン;ポリウレタン;ア
イオノマー類;セロファン;ポリエチレンセロファン;
セルロースアセテート;セルロースプロピオネート;エ
チルセルロース;ニトロセルロースなどの軟質、硬質樹
脂等が挙げられる。積層フィルムからなる波長変換資材
の製造法は特に制約はなく、押出し成形、インフレーシ
ョン成形などの共押出し法により複数のフィルムを積層
させるか接着剤層を介して複数のフィルムを積層させる
ことにより製造することが出来る。樹脂を溶解したワニ
スをガラス、プラスチック板、反射板、フィルムなどに
コーティングすることにより製造することができる。蛍
光色素(A)、(B)を含む樹脂層の厚さは成形フィル
ム、コーティング層ともに10〜300μm、好ましく
は30〜150μmにするのが良い。Examples of the material of the present invention include PVC; polyethylene; polypropylene; polyvinyl alcohol; polymethyl acrylate; polymethyl methacrylate; polyvinylidene chloride; polyacrylonitrile; polybutadiene; polystyrene; ethylene-methyl methacrylate copolymer; ethylene-acetic acid. Vinyl copolymer; vinyl chloride-
Copolymers such as vinyl acetate copolymer; polyvinyl butyral; polyvinyl formal; polyesters such as PET and PBT; polyarylate; polycarbonate; polyester carbonate; phenoxy resin; nylon 6,
Nylon 6/6, Nylon 11, Nylon 12, MXD
Polyamide such as 6 nylon; polydimethylsiloxane; polytrimethylsilylpropyne; polyurethane; ionomers; cellophane; polyethylene cellophane;
Cellulose acetate; cellulose propionate; ethyl cellulose; nitrocellulose and other soft and hard resins. There is no particular limitation on the method for producing the wavelength conversion material composed of a laminated film, and it is produced by laminating a plurality of films by a coextrusion method such as extrusion molding or inflation molding, or by laminating a plurality of films via an adhesive layer. You can It can be manufactured by coating a varnish in which a resin is dissolved on a glass, a plastic plate, a reflection plate, a film or the like. The thickness of the resin layer containing the fluorescent dyes (A) and (B) is 10 to 300 μm, preferably 30 to 150 μm for both the molding film and the coating layer.
【0018】樹脂に含有する蛍光色素(A)、(B)の
濃度は夫々0.01〜2.0 %、好ましくは0.05〜0.5 %であ
る。0.01%より濃度が低いと波長変換機能が十分でな
く、また2.0 %より濃度が高いと光の吸収割合が大きく
蛍光性化合物の特徴である濃度消光の効果が表われて波
長変換効率が低下する。また、蛍光色素(A) および蛍
光色素(B)の吸収極大波長における蛍光色素の吸光度
は1.3 以下が好ましく、これ以上大きい場合は光の吸収
割合、および吸収波長領域が大き過ぎる結果、遮光の効
果が強く表われるため好ましくない。施設園芸用資材と
しての他の諸条件を満たすため本発明の目的を損なわな
い種類および量の紫外線吸収剤、酸化防止剤、一重項酸
素クエンチャー、ヒンダードアミン系光安定剤、その他
の安定化剤、滑剤、防曇剤、流滴剤などの添加剤を配合
しても良い。紫外線吸収剤は蛍光色素と同一の層であっ
ても異なった層に配合しても良い。The concentration of the fluorescent dyes (A) and (B) contained in the resin is 0.01 to 2.0%, preferably 0.05 to 0.5%. If the concentration is lower than 0.01%, the wavelength conversion function is not sufficient, and if the concentration is higher than 2.0%, the absorption rate of light is large and the effect of concentration quenching, which is a characteristic of fluorescent compounds, is exhibited and the wavelength conversion efficiency decreases. . Further, the absorbance of the fluorescent dye at the absorption maximum wavelength of the fluorescent dye (A) and the fluorescent dye (B) is preferably 1.3 or less, and when it is larger than this, the light absorption ratio and the absorption wavelength region are too large, resulting in a light shielding effect. Is strongly displayed, which is not preferable. A type and amount of an ultraviolet absorber, an antioxidant, a singlet oxygen quencher, a hindered amine-based light stabilizer, and other stabilizers that do not impair the object of the present invention for satisfying other various conditions as a facility gardening material, You may mix | blend additives, such as a lubricant, an antifogging agent, and a drip agent. The ultraviolet absorber may be mixed in the same layer as the fluorescent dye or in a different layer.
【0019】蛍光色素(A)、(B)を含有した波長変
換資材は樹脂の屈折率によって異なるが、発光光のうち
60〜80%が空気との界面で全反射され、フィルム内
を伝わって行く。閉じ込められた光は多くの場合吸収ス
ペクトルが発光スペクトルと重なっているため一部の光
は再び吸収、発光をくり返す。この時、発光は一定の変
換効率を乗じた量で行なわれるのでエネルギーロスは無
視出来ない大きさになる。この様なエネルギーロスを回
避し発光光を有効にフィルム内面から放射することが出
来る様にシリカ、アルミナなどの無機微粉末、あるいは
プラスチック微粉末を配合するか、フィルムの内面に規
則的な、又は不規則な凹凸を設ける粗面化加工をするの
が好ましい。粗面化はワイヤーブラシ、サンドブラス
ト、エンボシングなど通常実施されている方法で行なう
ことが出来る。本発明の波長変換機能を持つ資材はビニ
ールハウスの被覆資材のほかマルチフィルム、反射(マ
ルチ)フイルム、太陽光がハウス内に平均して照射され
る様に設置する反射板、プラスチックネット、織布、不
織布、果実の袋掛け用の袋などにも同様に使用される。The wavelength conversion material containing the fluorescent dyes (A) and (B) depends on the refractive index of the resin, but 60 to 80% of the emitted light is totally reflected at the interface with the air and propagates through the film. go. In many cases, the trapped light has an absorption spectrum that overlaps with an emission spectrum, so that part of the light is repeatedly absorbed and emitted again. At this time, since the light emission is performed by the amount obtained by multiplying a certain conversion efficiency, the energy loss becomes a size that cannot be ignored. Inorganic fine powder such as silica, alumina, or plastic fine powder is blended so that the emitted light can be effectively emitted from the inner surface of the film while avoiding such energy loss, or the inner surface of the film is regularly or It is preferable to perform a roughening process for providing irregular irregularities. The roughening can be performed by a commonly used method such as wire brush, sand blasting or embossing. The material having the wavelength conversion function of the present invention is not only a covering material for a vinyl house but also a multi-film, a reflective (multi) film, a reflector plate installed so that sunlight is uniformly irradiated in the house, a plastic net, a woven cloth. It is also used for non-woven fabrics and bags for hanging fruits.
【0020】本発明の付加的効果として赤色光による害
虫の防除効果が挙げられる。光による害虫防除の方法と
しては、特開昭52−61581 に開示されている様に高反射
フィルムで土壌を被覆する方法と、特公平2−58898 に
開示されている様な緑色光を吸収し、赤色光を反射する
赤色系顔料を配合したマルチフィルムが代表的なもので
あるが、これらは光線透過率が低いためハウス、トンネ
ル等の展張用フィルムとして用いることが出来ない。本
発明の波長変換資材は樹脂中に蛍光色素(A)、(B)
が含有されているので入射光は散乱されず、効率良く透
過されるか青色光と橙色〜赤色光に変換されて放射され
るが、橙色〜赤色系の光にはハナムグリ類、アブラムシ
類、コナジラミ類などの害虫がこれを忌避する作用があ
り、従って、ハウス、トンネル内での農薬の使用を大幅
に削減することが出来る。An additional effect of the present invention is the control effect of harmful insects by red light. As a method for controlling insect pests by light, a method of covering the soil with a highly reflective film as disclosed in JP-A-52-61581 and a method for absorbing green light as disclosed in JP-B-2-58898. A typical example is a mulch film containing a red pigment that reflects red light, but these cannot be used as a film for spreading in houses, tunnels, etc. due to their low light transmittance. The wavelength conversion material of the present invention has fluorescent dyes (A) and (B) in the resin.
Since the incident light is not scattered, it is efficiently transmitted or is converted into blue light and orange to red light and emitted, but orange to red light emits beetles, aphids and whiteflies. Pests such as species have the action of repelling them, and therefore the use of pesticides in houses and tunnels can be greatly reduced.
【0021】[0021]
【実施例】以下、実施例を挙げて本発明を詳述する。実
施例中「部」は重量部を表わす。蛍光スペクトルは
(株)日立製作所製 フルオレツセンス スペクトロフ
オトメーター 850 を使用して測定した。透過率は
(株)島津製作所製 スペクトロフオトメーター UV-2
40を使用して測定した。The present invention will be described in detail below with reference to examples. In the examples, "part" represents part by weight. The fluorescence spectrum was measured using a Fluorescence Spectrophotometer 850 manufactured by Hitachi, Ltd. Transmittance is spectrophotometer UV-2 made by Shimadzu Corporation
It was measured using 40.
【0022】1.フィルム(A)の製造 エチレン−酢ビ共重合体(エバフレックスEV−45
0;三井デュポンケミカル(株))100部、UV吸収
剤バイオソーブ910(共同薬品(株))2.0部を2
00℃に設定したヒートロールで3分間混練したのち、
180℃の70トンホットプレスでプレス成形し厚さ
0.1mmのフィルム(A)を作製した。1. Production of Film (A) Ethylene-vinyl acetate copolymer (Evaflex EV-45
0: 100 parts of Mitsui DuPont Chemical Co., Ltd., 2.0 parts of UV absorber Biosorb 910 (Kyodo Pharmaceutical Co., Ltd.)
After kneading with a heat roll set at 00 ° C for 3 minutes,
A film (A) having a thickness of 0.1 mm was prepared by press molding with a 70-ton hot press at 180 ° C.
【0023】2.フィルム(B)の製造 エチレン−酢ビ共重合体(エバフレックスEV−45
0)100部、特願平3−242321に記載される次
式のピラジン誘導体〔I〕0.1部を200℃に設定し
たヒートロールで3分間混練したのち、180℃の70
トンホットプレスでプレス成形し厚さ0.1mmのフィ
ルム(B)を作製した。2. Production of Film (B) Ethylene-vinyl acetate copolymer (Evaflex EV-45
0) 100 parts and 0.1 part of the pyrazine derivative [I] of the following formula described in Japanese Patent Application No. 3-242321 were kneaded with a heat roll set at 200 ° C. for 3 minutes, and then 70 ° C. at 180 ° C.
Ton hot press to form a film (B) having a thickness of 0.1 mm.
【0024】[0024]
【化4】 [Chemical 4]
【0025】3.フィルム(C)の製造 エチレン−酢ビ共重合体(エバフレックスEV−45
0)100部、特願平5−276220に記載される次
式のピラジン誘導体〔II〕0.2部、ミカホワイトAT
N(日本化薬(株))0.02部を200℃に設定した
ヒートロールで3分間混練したのち、180℃の70ト
ンホットプレスでプレス成形し厚さ0.1mmのフィル
ム(C)を作製した。3. Production of Film (C) Ethylene-vinyl acetate copolymer (Evaflex EV-45
0) 100 parts, 0.2 part of pyrazine derivative [II] of the following formula described in Japanese Patent Application No. 5-276220, Mica White AT
After kneading 0.02 part of N (Nippon Kayaku Co., Ltd.) with a heat roll set at 200 ° C. for 3 minutes, press-molding with a 70-ton hot press at 180 ° C. to form a film (C) having a thickness of 0.1 mm. It was made.
【0026】[0026]
【化5】 [Chemical 5]
【0027】4.フィルムの(D)の製造 エチレン−酢ビ共重合体(エバフレックスEV−45
0)100部、特願平3−242321に記載されるピ
ラジン誘導体〔I〕0.1部、UV吸収剤バイオソーブ
910 2.0部を200℃に設定したヒートロールで
3分間混練したのち、180℃の70トンホットプレス
でプレス成形し厚さ0.1mmのフィルム(D)を作製
した。4. Production of film (D) Ethylene-vinyl acetate copolymer (Evaflex EV-45
0) 100 parts, 0.1 part of the pyrazine derivative [I] described in Japanese Patent Application No. 3-242321 and 2.0 parts of UV absorber Biosorb 910 were kneaded with a heat roll set at 200 ° C. for 3 minutes, and then 180 A film (D) having a thickness of 0.1 mm was produced by press molding with a 70 ton hot press at ℃.
【0028】5.フィルム(E)の製造 ポリエチレン(エースポリエチLL,旭化成工業
(株))を200℃に設定したヒートロールで溶融した
のち180℃の70トンホットプレスで厚さ0.1mm
のフィルム(E)を作製した。5. Manufacture of film (E) Polyethylene (ACE POLYETHI LL, Asahi Kasei Kogyo Co., Ltd.) is melted by a heat roll set at 200 ° C. and then a thickness of 0.1 mm is obtained by hot pressing at 70 ° C. at 180 ° C.
A film (E) was prepared.
【0029】6.フィルム(F)〜(J)の製造 樹脂としてエチレン−ビニルアルコール共重合体(エバ
ールEP−F101,EP−E105;(株)クラレ
製)、ナイロン12(グリルアミドL20;エムスジャ
パン(株))、エチレン−酢ビ共重合体(エバフレック
スP−1007;三井デュポンポリケミカル(株))
製、エチレン−酢ビ共重合体(酢ビ含量40モル%;ア
ルドリッチ社)を用いるほかは実施例2と同様にして厚
さ0.1mmのフィルム(F)〜(J)を作製した。6. Production of Films (F) to (J) As a resin, ethylene-vinyl alcohol copolymer (Eval EP-F101, EP-E105; manufactured by Kuraray Co., Ltd.), nylon 12 (Grillamide L20; Ems Japan Co., Ltd.), ethylene -Vinyl acetate copolymer (Eva Flex P-1007; DuPont Mitsui Polychemical Co., Ltd.)
Films (F) to (J) having a thickness of 0.1 mm were produced in the same manner as in Example 2 except that an ethylene-vinyl acetate copolymer (vinyl acetate content 40 mol%; Aldrich Co.) was used.
【0030】7.積層フィルムの製造 フィルム(A)〜(J)を組合わせ180℃の70トン
ホットプレスでプレス成形した。3層の時は0.12m
mのスペーサーを、5層の時は0.2mmのスペーサー
を使用して、それぞれ積層フィルムを作製した。7. Production of Laminated Film The films (A) to (J) were combined and press-molded by a 180-ton 70-ton hot press. 0.12m for 3 layers
Using m spacers and 0.2 mm spacers for 5 layers, laminated films were produced.
【0031】(1)(E)/(B)/(E) (2)(E)/(C)/(E) (3)(E)/(D)/(E) (4)(E)/(F)/(E) (5)(E)/(G)/(E) (6)(E)/(H)/(E) (7)(E)/(I)/(E) (8)(E)/(J)/(E) (9)(E)* /(A)/(E)/(B)/(E) (10)(E)* /(A)/(E)/(C)/(E) (11)(E)* /(A)/(E)/(F)/(E) (12)(E)* /(A)/(E)/(G)/(E) (13)(E)* /(A)/(E)/(H)/(E) (14)(E)* /(A)/(E)/(I)/(E) (15)(E)* /(A)/(E)/(J)/(E) フィルム(10)の蛍光の励起および発光スペクトルを図
−1に示した。発光強度の比(I)/(I’)は約1.
6である。(1) (E) / (B) / (E) (2) (E) / (C) / (E) (3) (E) / (D) / (E) (4) (E ) / (F) / (E) (5) (E) / (G) / (E) (6) (E) / (H) / (E) (7) (E) / (I) / (E ) (8) (E) / (J) / (E) (9) (E) * / (A) / (E) / (B) / (E) (10) (E) * / (A) / (E) / (C) / (E) (11) (E) * / (A) / (E) / (F) / (E) (12) (E) * / (A) / (E) / (G) / (E) (13) (E) * / (A) / (E) / (H) / (E) (14) (E) * / (A) / (E) / (I) / (E) (15) (E) * / (A) / (E) / (J) / (E) The fluorescence excitation and emission spectra of the film (10) are shown in FIG. The ratio of emission intensity (I) / (I ′) is about 1.
It is 6.
【0032】試験例 フィルム(B),(C),(D)および(1)〜(15)
のサンシャインウェザオメーター試験を行なった。フィ
ルム(9)〜(15)は(E)* 側から光を照射した。結
果を第1表に示した。Test Example Films (B), (C), (D) and (1) to (15)
The sunshine weatherometer test was conducted. The films (9) to (15) were irradiated with light from the (E) * side. The results are shown in Table 1.
【0033】[0033]
【表1】 [Table 1]
【0034】[0034]
【発明の効果】本発明は耐光性に優れ、次の様な効果が
ありその実用的有用性は極めて大きい。 (1)本発明の農業用波長変換資材は太陽光および植物
工場等で用いる人工光源の光スペクトルの近紫外光領域
と緑色光領域の光を植物生育に有効な光である青色光領
域と橙色〜赤色光領域の光に変換することができる。 (2)本発明の波長変換資材を用いたハウスで野菜、花
卉、ナシ、ミカン、ブドウ、カキ、リンゴなどの果樹類
を栽培することにより野菜、花卉の場合は短期間、多
収、果樹類の場合は例えば果色を調節したり、糖度を高
めたり、果実を大きくするといったように高品質の果物
を収穫することができる。 (3)本発明の波長変換資材が発光する橙色〜赤色光に
より害虫を防除することができる。INDUSTRIAL APPLICABILITY The present invention has excellent light resistance and has the following effects, and its practical utility is extremely large. (1) The wavelength conversion material for agriculture of the present invention uses sunlight and light in the near-ultraviolet light region and green light region of the artificial light source used in plant factories, etc., which are effective for plant growth in the blue light region and orange light. ~ It can be converted into light in the red light region. (2) By growing fruit trees such as vegetables, flowers, pears, mandarins, grapes, oysters, apples, etc. in a house using the wavelength conversion material of the present invention, in the case of vegetables and flowers, high yield, fruit trees In this case, high quality fruits can be harvested, for example, by controlling the fruit color, increasing the sugar content, and increasing the fruit size. (3) Pests can be controlled by the orange to red light emitted by the wavelength conversion material of the present invention.
【図1】フィルム(10)の励起および発光スペクトル。
(p)はミカホワイトATN(A)の410nm発光に対
する励起スペクトル。(q)はミカホワイトATN
(A)の380nmの励起による発光スペクトル。(I)
は蛍光色素(A)自体の発光ピーク。(I’)は蛍光色
素(A)の励起エネルギーが蛍光色素(B)にエネルギ
ー移動した結果発光するピーク。(r)はピラジン誘導
体〔II〕(B)の589nm発光に対する励起スペクト
ル。(s)はピラジン誘導体〔II〕(B)の492nmの
励起による発光スペクトル。FIG. 1 Excitation and emission spectra of film (10).
(P) is the excitation spectrum of Mica White ATN (A) for 410 nm emission. (Q) is Mica White ATN
Emission spectrum of (A) upon excitation at 380 nm. (I)
Is the emission peak of the fluorescent dye (A) itself. (I ′) is a peak that emits light as a result of energy transfer of the excitation energy of the fluorescent dye (A) to the fluorescent dye (B). (R) is an excitation spectrum of the pyrazine derivative [II] (B) for 589 nm emission. (S) is an emission spectrum of pyrazine derivative [II] (B) upon excitation at 492 nm.
Claims (3)
大が380 〜520 nmにある少くとも1つの蛍光色素(A)
と吸収極大が460 〜580 nmにあり、発光極大が540 〜80
0 nmにある少くとも1つの蛍光色素(B)が含有されて
おり、(A)の発光スペクトルと(B)の吸収スペクト
ルが部分的に重複するような組み合わせであり、(A)
の発光強度(I)と、(A)の励起エネルギーの一部が
(B)の発光位置で発光する強度(I’)の比(I)/
(I’)が0.2以上5以下である積層フィルムからな
る農業用波長変換資材。1. At least one fluorescent dye (A) having an absorption maximum at 350-450 nm and an emission maximum at 380-520 nm.
And the absorption maximum at 460 to 580 nm, and the emission maximum at 540 to 80
At least one fluorescent dye (B) at 0 nm is contained in the combination such that the emission spectrum of (A) and the absorption spectrum of (B) partially overlap, (A)
Ratio (I) / intensity (I) of (A) and intensity (I ′) at which a part of the excitation energy of (A) emits light at the emission position of (B)
An agricultural wavelength conversion material comprising a laminated film having (I ′) of 0.2 or more and 5 or less.
少なくとも1つの蛍光色素(B)のストークスシフトが
20nm以上である請求項1記載の積層フィルムからなる
農業用波長変換資材。2. The wavelength conversion material for agriculture comprising a laminated film according to claim 1, wherein the Stokes shift of at least one fluorescent dye (A) and at least one fluorescent dye (B) is 20 nm or more.
くとも1つの蛍光色素(B)の吸収極大波長における蛍
光色素の吸光度が1.3 以下である請求項1記載の積層フ
ィルムからなる農業用波長変換資材。3. An agricultural wavelength comprising a laminated film according to claim 1, wherein the absorbance of the fluorescent dye at the absorption maximum wavelength of at least one fluorescent dye (A) and at least one fluorescent dye (B) is 1.3 or less. Conversion material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5344406A JPH07170865A (en) | 1993-12-17 | 1993-12-17 | Wavelength conversion material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5344406A JPH07170865A (en) | 1993-12-17 | 1993-12-17 | Wavelength conversion material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07170865A true JPH07170865A (en) | 1995-07-11 |
Family
ID=18369012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5344406A Pending JPH07170865A (en) | 1993-12-17 | 1993-12-17 | Wavelength conversion material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07170865A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0792907A2 (en) * | 1996-02-29 | 1997-09-03 | Sumitomo Chemical Company Limited | Polyolefin resin composition and laminated film comprising the same |
KR100404977B1 (en) * | 1996-06-27 | 2004-03-19 | 삼성아토피나주식회사 | Resin composition for light conversion film |
WO2008126766A1 (en) | 2007-04-06 | 2008-10-23 | Asahi Glass Company, Limited | Wavelength conversion film, film for agricultural use, structure, and composition for forming coating film |
WO2009115574A1 (en) | 2008-03-19 | 2009-09-24 | Grow Foil B.V. | Greenhouse for enhanced plant growth |
JP2010115193A (en) * | 2008-10-15 | 2010-05-27 | Tokyo Univ Of Science | Cultivation method for agricultural crop using fluorescence radiation material, and material to be used for the same |
JP2013538172A (en) * | 2010-07-23 | 2013-10-10 | サン−ゴバン グラス フランス | Composite window glass as a head-up display |
JP2014518530A (en) * | 2011-04-15 | 2014-07-31 | サン−ゴバン グラス フランス | Method for producing film having luminescent particles |
WO2015168439A1 (en) | 2014-04-30 | 2015-11-05 | Nitto Denko Corporation | Inorganic oxide coated fluorescent chromophores for use in highly photostable wavelength conversion films |
CN106018305A (en) * | 2016-07-29 | 2016-10-12 | 北京大学东莞光电研究院 | Method for determining universal light spectrum of various plants and plant light spectral interval |
KR20160141996A (en) | 2015-06-02 | 2016-12-12 | 조형진 | Sunscreen and transmission conversion type Agricultural Cultivation House |
US9960294B2 (en) | 2013-01-04 | 2018-05-01 | Nitto Denko Corporation | Highly fluorescent and photo-stable chromophores for wavelength conversion |
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-
1993
- 1993-12-17 JP JP5344406A patent/JPH07170865A/en active Pending
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0792907A2 (en) * | 1996-02-29 | 1997-09-03 | Sumitomo Chemical Company Limited | Polyolefin resin composition and laminated film comprising the same |
EP0792907A3 (en) * | 1996-02-29 | 1998-07-15 | Sumitomo Chemical Company Limited | Polyolefin resin composition and laminated film comprising the same |
KR100404977B1 (en) * | 1996-06-27 | 2004-03-19 | 삼성아토피나주식회사 | Resin composition for light conversion film |
WO2008126766A1 (en) | 2007-04-06 | 2008-10-23 | Asahi Glass Company, Limited | Wavelength conversion film, film for agricultural use, structure, and composition for forming coating film |
US8501313B2 (en) | 2007-04-06 | 2013-08-06 | Asahi Glass Company, Limited | Wavelength conversion film, agricultural film, structure and coating film forming composition |
WO2009115574A1 (en) | 2008-03-19 | 2009-09-24 | Grow Foil B.V. | Greenhouse for enhanced plant growth |
JP2010115193A (en) * | 2008-10-15 | 2010-05-27 | Tokyo Univ Of Science | Cultivation method for agricultural crop using fluorescence radiation material, and material to be used for the same |
JP2013538172A (en) * | 2010-07-23 | 2013-10-10 | サン−ゴバン グラス フランス | Composite window glass as a head-up display |
JP2014518530A (en) * | 2011-04-15 | 2014-07-31 | サン−ゴバン グラス フランス | Method for producing film having luminescent particles |
US9960294B2 (en) | 2013-01-04 | 2018-05-01 | Nitto Denko Corporation | Highly fluorescent and photo-stable chromophores for wavelength conversion |
US10461201B2 (en) | 2013-01-04 | 2019-10-29 | Nitto Denko Corporation | Highly-fluorescent and photo-stable chromophores for wavelength conversion |
US10840397B2 (en) | 2013-01-04 | 2020-11-17 | Nitto Denko Corporation | Highly-fluorescent and photo-stable chromophores for wavelength conversion |
WO2015168439A1 (en) | 2014-04-30 | 2015-11-05 | Nitto Denko Corporation | Inorganic oxide coated fluorescent chromophores for use in highly photostable wavelength conversion films |
KR20160141996A (en) | 2015-06-02 | 2016-12-12 | 조형진 | Sunscreen and transmission conversion type Agricultural Cultivation House |
CN106018305A (en) * | 2016-07-29 | 2016-10-12 | 北京大学东莞光电研究院 | Method for determining universal light spectrum of various plants and plant light spectral interval |
EP3882017A1 (en) * | 2020-03-20 | 2021-09-22 | Daios, Asterios | Multilayer plastic film for agricultural use |
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