JP2005008687A - Water-resistant luminous pigment-containing resin composition and its molded article - Google Patents

Water-resistant luminous pigment-containing resin composition and its molded article Download PDF

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Publication number
JP2005008687A
JP2005008687A JP2003171666A JP2003171666A JP2005008687A JP 2005008687 A JP2005008687 A JP 2005008687A JP 2003171666 A JP2003171666 A JP 2003171666A JP 2003171666 A JP2003171666 A JP 2003171666A JP 2005008687 A JP2005008687 A JP 2005008687A
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Prior art keywords
phosphorescent pigment
resin composition
water
resistant
containing resin
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JP2003171666A
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Japanese (ja)
Inventor
Toshiro Kobayashi
敏郎 小林
Kazufumi Sakai
和文 酒井
Yoshinori Iwasaki
嘉則 岩崎
Shin Karasawa
伸 唐沢
Kazumi Yamashiro
一三 山城
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TDO GRAPHICS CO Ltd
Tokyo Printing Ink Mfg Co Ltd
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TDO GRAPHICS CO Ltd
Tokyo Printing Ink Mfg Co Ltd
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Priority to JP2003171666A priority Critical patent/JP2005008687A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish

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  • Compositions Of Macromolecular Compounds (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition which has excellent water resistance and weather resistance and is used for forming buoys using a luminous pigment and capable of being easily recognized from traveling ships in night, and to provide a molded article thereof. <P>SOLUTION: This water-resistant luminous pigment-containing resin composition comprises 100 pts. wt. of a thermoplastic resin and 1 to 30 pts. wt. of an alkali rare earth silicon alminate luminous pigment having an average particle diameter of 1 to 50μm, and the molded article thereof. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、耐水性蓄光顔料配合樹脂組成物及びその成形品に関する発明である。詳しくは、本発明の耐水性蓄光顔料配合樹脂組成物は耐水性と蓄光性に富んでおり、これを用いた成形品、例えば浮標、救命具取り付け紐、漁業用ロ−プ、安全ネット等海洋上で使用する成形品や、日常野外で使用することが多く雨水や湿気に曝され易い成形品に、最適な耐水性蓄光顔料配合樹脂組成物を提供するものである。
【0002】
【従来の技術】
蓄光顔料は、光を受けて発光し、光を取り除いた後も発光するといった残光性を有する発光体である。
従来より、海上の養殖場等では、網やフェンスの位置を表示するために、浮標(通称ブイ)が多数使用されており、漁船やその他船舶にもその存在を明示している。しかし、夜間走行する漁船やその他の船舶からは浮標が見え難く、網やフェンスを破損する事故が多く発生している。
【0003】
このため従来より、浮標の外表面に発光顔料含有塗料を塗装したものが提案され使用されているが、浮標に光があたると発光顔料が発光し浮標の存在を目視可能としているが投光が弱いと、十分な発光が望めず浮標の確認が困難である。 しかも、発光顔料含有の塗装が剥がれ易く、簡単に発光機能が低下し易い欠点がある。
そこで近年、発光顔料に代えて光を吸収して蓄光し、暗所で発光する蓄光顔料の利用が盛んになっており、従来は硫化亜鉛が広く使用されている(例えば、特許文献2参照)。しかし、硫化亜鉛は輝度が低いこと、及び放射性物質を加え励起させて使用しており、安全管理上から好ましくない。
【0004】
上記欠点を解消する蓄光顔料として、近年、硫化亜鉛より輝度に優れたアルミン酸ストロンチウムが開発されて、これを使用した成形品の製造が盛んに試みられているが、屋外に長時間放置すると大気や雨水によって、蓄光性物質の一部が化学的に変化したり水に溶出したりしていまい、その機能を損ねるという欠点を有している。
この様に、蓄光顔料を浮標外面に塗布することも試みられているが、蓄光顔料としてアルミン酸ストロンチウムを使用の場合には、常時海水に触れている浮標や漁網ロ−プでは耐水性に劣るため短時間で発光残光効果が著しく低下して、満足する蓄光機能が得られず、長期間にわたって満足する蓄光効果が必要な浮標や漁網用ロ−プ等成形品としては不適当である。
【0005】
【発明が解決しようとする課題】
そこで、本発明は、蓄光顔料を配合した浮標や漁網用ロ−プが、海洋での夜間に於いても、高輝度でかつ長期間にわたって、発光色にムラがなく、優れた蓄光性を有する耐水性に良好な蓄光顔料を配合して熱可塑性樹脂組成物を製造して、これを用い上記の様な海洋上で使用する浮標や漁網用ロ−プに、また、湿気に曝され易い夜間暗い所でも使用可能な成形品を製造することを検討したのである。
【0006】
【課題を解決するための手段】
即ち、請求項1では、 熱可塑性樹脂100重量部に、平均粒径1〜150μmのアルカリ稀土珪素アルミン酸塩蓄光顔料を1〜30重量部を配合してなる耐水性蓄光顔料配合樹脂組成物である。
【0007】
本発明の耐水性蓄光顔料配合樹脂組成物は、従来品に比較して耐水性に優れた蓄光顔料を熱可塑性樹脂中に混練配合することで、水分との接触をほぼ遮断しており、蓄光顔料が長期にわたって光を受けた場合にも発光し易く、光を取り除いた後でも大いに残光を有する成形品を提供するものである。
請求項1で使用の熱可塑性樹脂としては、最終製品の用途に応じて各種の熱可塑性樹脂が適宜使用可能であり、従来より、公知のものの中からポリエチレン、ポリプロピレン、ポリスチレン、ABS樹脂、アクリル樹脂、ポリカ−ボネ−ト、ポリエチレンテレフタレ−ト、ポリアミド、ポリウレタンなど、又はこれらのポリマ−アロイ、あるいはポリウレタン系やポリエチレン系などのエラストマ−が挙げられる。
【0008】
尚、熱可塑性樹脂としては、光透過性が良好な樹脂、例えばポリスチレン、ポリエチレンテレフタレ−ト、ポリエチレン及びポリプロピレンが蓄光顔料配合の際に光透過性に富んでおり好ましい。
本発明で使用するアルカリ稀土珪素アルミン酸塩蓄光顔料は、耐水性と耐候性に富んでおり、太陽光や蛍光灯など放射される微量の紫外線ならびに電灯などの非紫外線によっても、自らエネルギ−を活性化させて発光する物質で受光の停止後、暗闇の中で極めて明るくしかも長時間にわたって光り続ける結晶体で、本機能(光の吸収と発光)は半永久的に繰り返しが可能である。
【0009】
本発明で使用の蓄光顔料は、硫化亜鉛タイプ蓄光顔料やアルミン酸ストロンチウム蓄光顔料に比較して、より多くのエネルギ−を吸収し、化学的に安定している性質と長い残光時間の優位性を持っている。
本発明では、熱可塑性樹脂100重量部にアルカリ稀土珪素アルミン酸塩蓄光顔料を1〜30重量部を配合する。尚、該蓄光顔料使用量が1重量部より少ないと、これを用いて得られる樹脂成形品の蓄光性は満足する効果が得られず、商品価値に劣り好ましくない。又、30重量部より多い場合には、熱可塑性樹脂と混練に多くの時間を要するばかりでなく、蓄光効果が向上せずに生産コストも高くなり好ましくない。
【0010】
本発明で使用するアルカリ稀土珪素アルミン酸塩蓄光顔料は、その平均粒径が1〜150μmのものを使用する。平均粒径が1μmより小さいとこれを配合した樹脂を用いた成形品では十分な光放射性(残光性)効果が得られず好ましくない、又、150μmより大きいと蓄光顔料と熱可塑性樹脂の十分な混練が困難となり、分散性が低下し、このため光放射効果が十分に得られず商品価値を低下して好ましくない。
【0011】
請求項2では、 請求項1記載のアルカリ稀土珪素アルミン酸塩蓄光顔料が、珪素アルミン酸ストロンチウムを主成分とする蓄光顔料である耐水性蓄光顔料配合樹脂組成物である。
本発明で使用の蓄光顔料は、アルカリ稀土珪素アルミン酸塩蓄光顔料として、耐候性と蓄光性に優れた最も好ましい、珪素アルミン酸ストロンチウムを主成分とするものである。
該蓄光顔料は、水中に於いても中性であり耐水性に非常に優れている、また耐候性にも優れており化学変化を起こし難い。
【0012】
請求項3は、請求項1記載の熱可塑性樹脂が、ポリエチレンである耐水性蓄光顔料配合樹脂組成物である。
ポリエチレンは、他の樹脂に比較して化学的にも安定で耐候性に富んでおり、海洋や屋外で暴露される商品として蓄光顔料配合の浮標などに最適である。 更に、低密度ポリエチレンは透明性も良好であり蓄光顔料を配合した場合にも得られる成形品は、太陽光や蛍光灯などの受光停止後、暗闇の中でも極めて明るくしかも、長時間にわたって光り続けるために浮標や漁業用ロ−プの成形品として最適である。
【0013】
請求項4は、請求項1〜3記載の耐水性蓄光顔料配合樹脂組成物を用い、成形してなる浮標である。
本発明の浮標(ブイ)は、予め蓄光顔料を樹脂中に混練することで、蓄光顔料が熱可塑性樹脂に被覆されて外気との接触を遮断しており蓄光顔料の欠点である吸湿性を防いでいる。しかも、本発明で使用する蓄光顔料珪素アルミン酸ストロンチウムは、従来品の蓄光顔料に比較して耐水性に富んでいるために長期間海水中に浮遊させる浮標などでも蓄光効果が全く低下しないものが得られる。
【0014】
尚、本発明で成形する浮標の形態は、従来から製造されている各種浮標に使用可能であり、最も代表例としては熱可塑性樹脂を用い製造した密閉中空体が挙げられる。そして、本発明では、密閉中空体の外皮となる層に耐水性蓄光顔料配合樹脂組成物を配合し成形してなる浮標である。従って、蓄光顔料配合塗料を浮標の外面に塗布した従来品の様に蓄光顔料が剥げ落ちる心配が全くない。
【0015】
請求項5は、請求項1〜3記載の耐水性蓄光顔料配合樹脂組成物を用い、成形してなる漁業用ロ−プである。
本発明の漁網用ロ−プは、必要に応じて樹脂の種類を代え同時に該ロ−プの太さも変えて各種漁業用ロ−プの製造が可能であり、蓄光顔料がロ−プ本体中に存在しており蓄光顔料配合塗料の様に剥げ落ちる心配もない。
【0016】
本発明の耐水性蓄光顔料配合樹脂組成物の製造では、従来より熱可塑性樹脂組成物を製造する際に使用する機器、例えば、ミキシングロ−ル、加圧ニ−ダ−、押出機等を用い、通常の方法で製造すれば良い。
尚、樹脂組成物の製造では、熱可塑性樹脂に対する蓄光顔料の配合量を多めにした、所謂マスタ−バッチを製造した後に、本発明の配合割合に希釈した耐水性蓄光顔料樹脂組成物を製造すれば良い。
同様に、浮標やロ−プの製造でも、従来より汎用のブロ−成形機、Tダイ成形機、インジェクション成形機等を任意に用い、通常の方法で成形すれば良い。
又、本発明の耐水性蓄光顔料配合樹脂組成物には、その性質を損なわない範囲で各種の添加剤、例えば酸化防止剤、顔料、帯電防止剤、滑剤等を任意に配合しても良い。
【0017】
以下に実施例及び比較例を記載する。
実施例1 MI値2、低密度0.92の低密度ポリエチレン100重量部に、平均粒径25μmの珪素アルミン酸ストロンチウム蓄光顔料(TDOグラフィックス株式会社商品 ヒカリ・マスHG)10重量部を、タンブラ−を用い混合して、これをL/D28,φ30mm押出機を用い160℃で混練し、本発明の耐水性蓄光顔料配合樹脂組成物のペレットを製造する。
該樹脂組成物ペレットを用いた浮標の製造は、押出機により押出したパリソンを金型の間に配置し、パリソン内に突き刺したブロ−針より圧縮空気を吹き込みブロ−成形した後、ブロ−針にて貫通したブロ−を塞いで肉厚5mmである外径30cmの球形製品を得る。
該浮標は、夜間海洋中の暗所でも、その存在が明確に認識されている。
【0018】
次に実施例1で得られた耐水性蓄光顔料配合樹脂組成物について、下記の▲1▼分散性、▲2▼経時残光性能、▲3▼色移行性及び▲4▼耐水性について、次に示す評価方法によって測定して、その結果を表1に記載する。
尚、各評価の際に使用する測定シ−トは、各実施例又は比較例で得られた樹脂組成物を、加熱プレスを用いて作成した50×150×2mmのシ−トを用いた。
【0019】
▲1▼分散性
熱可塑性樹脂中への蓄光顔料の分散性を、測定シ−トを用い目視によって、
次の基準により測定する。
◎………良好、
○………ほぼ良好、
△………やや不良、
×………不良。
【0020】
▲2▼経時残光性能
測定シ−トを約15時間暗中に放置して残光を消去した後、D65標準光源により200ルックスの明るさで10分間刺激し、その直後の蓄光性と経時残光性を目視により、次の基準で評価する。
◎………極めて良好、
○………良好、
△………やや良好、
×………不良。
【0021】
▲3▼移行性
測定シ−トに白色シ−トを積層した後、全体に100gの加重をかけた状態で70℃に加温して2日間放置し、白色シ−トへの色移行の有無を調べる。
◎………移行性、全くなし、
○………移行性、やや有り、
×………移行性が顕著である。
【0022】
▲4▼耐水性
測定シ−トを水中に一週間浸した後に、この測定シ−トの経時残光性能を▲2▼の方法、即ち該測定シ−トを約15時間暗中に放置して残光を消去した後、D65標準光源により200ルックスの明るさで10分間刺激し、その直後の蓄光性と経時残光性を目視により、耐水性試験前の測定シ−トと比較し、
次の基準で評価する。
◎……耐水性試験前と全く変わらない
○……耐水性試験前よりやや低下
×……耐水性試験前より、かなり低下。
【0023】
【表1】

Figure 2005008687
【0024】
以下、実施例1と同様に実施例2〜4、比較例1〜8についても、上記の▲1▼、▲2▼及び▲3▼の評価方法により測定して、その結果を表1に示す。
【0025】
実施例2 MI値2、密度0.98のポリプロピレン100重量部に、平均粒径20μmの珪素アルミン酸ストロンチウム蓄光顔料(TDOグラフィックス株式会社商品 ヒカリ・マスST)15重量部を、タンブラ−を用い混合して、これをL/D28,φ30mm押出機を用い230℃で混練し、本発明の耐水性蓄光顔料配合樹脂組成物のペレットを製造する。
該樹脂組成物を用いた浮標の製造は、押出機により押出したパリソンを金型の間に配置し、パリソン内に突き刺したブロ−針より圧縮空気を吹き込みブロ−成形した後、ブロ−針にて貫通した穴を塞いで肉厚5mmの直径30cmの球形製品を得る。
該浮標は、夜間海洋中の暗所でも、その存在が明確に認識されている。
【0026】
実施例3 耐衝撃性ポリスチレン(出光石油化学株式会社商品名 IT41)100重量部に平均粒径20μmの珪素アルミン酸ストロンチウム蓄光顔料(TDOグラフィックス株式会社商品 ヒカリ・マスHG)15重量部を、タンブラ−を用い混合して、これをL/D28,φ30mm押出機を用いて、200℃で混練し、本発明の耐水性蓄光顔料配合樹脂組成物のペレットを製造する。 該樹脂組成物のペレットを用いて、射出成形機によって、道路案内表示板を製造する。
該道路案内表示板は、夜間の暗所でも、その存在が遠方から明確に認識される。
【0027】
実施例4 ポリカ−ボネ−ト樹脂(三菱化成株式会社商品名 ノバレックス7022PT)100重量部に平均粒径20μmの珪素アルミン酸ストロンチウム蓄光顔料(TDOグラフィックス株式会社商品 ヒカリ・マスST)15重量部を、タンブラ−を用い混合して、これをL/D28,φ30mm押出機を用い280℃で混練し、本発明耐水性蓄光顔料配合樹脂組成物ペレットを製造する。 該樹脂組成物を用いて、射出成形機によって、携帯電話に使用のボタン類を製造する。このボタンは、夜間暗所でも、明瞭に識別可能である。
【0028】
比較例1 実施例1に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料の使用量を0.5重量部とする以外は、実施例1と同じである。
比較例2 実施例1に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料の使用量を40重量部とする以外は、実施例1と同じである。
比較例3 実施例1に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料の平均粒径0.5μmとする以外は、実施例1と同じである。
比較例4 実施例1に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料の平均粒径200μmとする以外は、実施例1と同じである。
【0029】
比較例5 実施例1に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料に代えてアルミン酸ストロンチウムを使用する以外は、実施例1と同じである。
比較例6 実施例4に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料の使用量を0.5重量部とする以外は、実施例4と同じである。
比較例7 実施例4に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料の使用量を40重量部とする以外は、実施例4と同じである。
比較例8 実施例4に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料の平均粒径0.5μmとする以外は、実施例4と同じである。
比較例9 実施例4に於いて使用の珪素アルミン酸ストロンチウム蓄光顔料の平均粒径200μmとする以外は、実施例4と同じである。
【0030】
【発明の効果】
本発明の耐水性蓄光顔料配合樹脂組成物は、蓄光顔料として光輝性、耐水性及び耐候性に富んだアルカリ稀土珪素アルミン酸塩蓄光顔料を用い、しかも、該蓄光顔料を樹脂中に配合している。
従って、蓄光顔料を塗料中に配合した従来品と異なり、海水に浮遊される浮標でも本発明で使用する蓄光顔料は分解する心配が全くなく、従って光輝性が長期間にわたって発揮され夜間走行する船舶からも、容易にその存在が確認できる。
また、本発明の耐光性蓄光顔料配合樹脂組成物を用いた成形品としては、浮標や漁網等の海洋上の成形品ばかりでなく、市街地での夜間暗闇でも識別が必要である装置や器具等、例えば消火栓の上部に取り付けた標識マ−クなどに使用すると、消火栓の確認に大いに貢献するものである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water-resistant phosphorescent pigment-containing resin composition and a molded product thereof. In detail, the water-resistant phosphorescent pigment-containing resin composition of the present invention is rich in water resistance and phosphorescence, and molded articles using the resin composition, for example, buoys, lifepiece attachment strings, fishing ropes, safety nets, etc. The present invention provides an optimal water-resistant phosphorescent pigment-containing resin composition for molded products used in the field and molded products that are frequently used outdoors and are easily exposed to rainwater and moisture.
[0002]
[Prior art]
A phosphorescent pigment is a light-emitting body having afterglow properties that emits light upon receiving light and emits light even after the light is removed.
Conventionally, a large number of buoys (commonly called buoys) have been used to display the positions of nets and fences at sea farms and the like, and their existence is clearly indicated on fishing boats and other ships. However, buoys are difficult to see from fishing boats and other vessels that travel at night, and many accidents that damage the nets and fences occur.
[0003]
For this reason, the buoy has been proposed and used with a paint containing a luminescent pigment on the outer surface of the buoy.However, when the buoy is exposed to light, the luminescent pigment emits light, and the presence of the buoy is visible, but the light is projected. If it is weak, sufficient light emission cannot be expected and it is difficult to confirm the buoy. In addition, there is a drawback that the coating containing the luminescent pigment is easily peeled off and the light emitting function is easily lowered.
Therefore, in recent years, a phosphorescent pigment that absorbs light and accumulates light instead of a luminescent pigment and emits light in a dark place has been actively used, and zinc sulfide has been widely used in the past (for example, see Patent Document 2). . However, zinc sulfide is not preferable in terms of safety management because it has low luminance and is excited by adding a radioactive substance.
[0004]
In recent years, strontium aluminate, which has higher brightness than zinc sulfide, has been developed as a phosphorescent pigment that eliminates the above drawbacks, and attempts have been actively made to produce molded products using it. And, due to rainwater, some of the phosphorescent substances are chemically changed or eluted into water, which has the disadvantage of impairing its function.
In this way, it has been attempted to apply the phosphorescent pigment to the outer surface of the buoy. However, when strontium aluminate is used as the phosphorescent pigment, the buoy or fishing net rope that is always in contact with seawater is inferior in water resistance. Therefore, the afterglow effect of light emission is remarkably reduced in a short time, a satisfactory phosphorescence function cannot be obtained, and it is not suitable as a molded product such as a buoy or a fishing net rope that requires a satisfactory phosphorescence effect over a long period of time.
[0005]
[Problems to be solved by the invention]
Therefore, the present invention provides a buoy or fishing net rope blended with a phosphorescent pigment that has high luminance and no unevenness in emission color over a long period of time even at night in the ocean, and has excellent phosphorescent properties. A thermoplastic resin composition is blended with a phosphorescent pigment with good water resistance, and is used for buoys and fishing net ropes used on the ocean as described above, and at night when exposed to moisture. We studied the production of molded products that can be used in dark places.
[0006]
[Means for Solving the Problems]
That is, in claim 1, a water-resistant phosphorescent pigment-containing resin composition comprising 100 parts by weight of a thermoplastic resin and 1 to 30 parts by weight of an alkali rare earth silicon aluminate phosphorescent pigment having an average particle diameter of 1 to 150 μm. is there.
[0007]
The resin composition containing the water-resistant phosphorescent pigment of the present invention kneads and blends a phosphorescent pigment superior in water resistance into a thermoplastic resin compared to conventional products, thereby substantially blocking contact with moisture. The present invention provides a molded article that easily emits light even when the pigment receives light over a long period of time and has a great afterglow even after the light is removed.
As the thermoplastic resin used in claim 1, various thermoplastic resins can be used as appropriate according to the use of the final product, and conventionally known polyethylene, polypropylene, polystyrene, ABS resin, acrylic resin among known ones. , Polycarbonate, polyethylene terephthalate, polyamide, polyurethane, or the like, or polymer alloys thereof, or polyurethane or polyethylene elastomers.
[0008]
As the thermoplastic resin, a resin having good light transmission, such as polystyrene, polyethylene terephthalate, polyethylene and polypropylene, is preferable because it is rich in light transmission when the phosphorescent pigment is blended.
The alkali rare earth silicon aluminate phosphorescent pigment used in the present invention is rich in water resistance and weather resistance, and it is able to generate energy by itself even with a small amount of ultraviolet rays such as sunlight and fluorescent lamps and non-ultraviolet rays such as electric lamps. This function (absorption and emission of light) can be repeated semipermanently with a crystal that is activated and emits light and stops emitting light after being stopped and is extremely bright in the dark and continues to shine for a long time.
[0009]
The phosphorescent pigment used in the present invention absorbs more energy and is chemically stable and has a long afterglow time compared to zinc sulfide type phosphorescent pigments and strontium aluminate phosphorescent pigments. have.
In the present invention, 1 to 30 parts by weight of alkali rare earth silicon aluminate phosphorescent pigment is blended with 100 parts by weight of the thermoplastic resin. If the amount of the phosphorescent pigment used is less than 1 part by weight, the phosphorescent property of the resin molded product obtained using the pigment is not satisfactory, and the commercial value is inferior. On the other hand, when the amount is more than 30 parts by weight, not only a long time is required for kneading with the thermoplastic resin, but the luminous effect is not improved and the production cost is increased, which is not preferable.
[0010]
The alkali rare earth silicon aluminate phosphorescent pigment used in the present invention has an average particle diameter of 1 to 150 μm. If the average particle size is smaller than 1 μm, a molded product using a resin containing the average particle size is not preferable because sufficient light emission (afterglow) effect cannot be obtained, and if it is larger than 150 μm, the phosphorescent pigment and the thermoplastic resin are sufficient. Kneading becomes difficult and the dispersibility is lowered, so that the light radiation effect cannot be sufficiently obtained, and the commercial value is lowered, which is not preferable.
[0011]
In claim 2, the alkali rare earth silicon aluminate phosphorescent pigment according to claim 1 is a water-resistant phosphorescent pigment-containing resin composition which is a phosphorescent pigment mainly composed of strontium silicon aluminate.
The phosphorescent pigment used in the present invention is, as an alkali rare earth silicon aluminate phosphorescent pigment, the most preferable one having strontium silicon aluminate as the main component, which is excellent in weather resistance and phosphorescent property.
The phosphorescent pigment is neutral even in water, very excellent in water resistance, and excellent in weather resistance, and hardly undergoes a chemical change.
[0012]
A third aspect of the present invention is a water-resistant phosphorescent pigment-containing resin composition in which the thermoplastic resin according to the first aspect is polyethylene.
Polyethylene is chemically stable and rich in weather resistance compared to other resins, and is optimal for buoys containing phosphorescent pigments as products exposed in the ocean and outdoors. In addition, low-density polyethylene has good transparency, and the molded product obtained even when a phosphorescent pigment is blended is extremely bright in the dark after receiving light from sunlight and fluorescent lamps, and continues to shine for a long time. It is ideal as a molded product for buoys and fishing ropes.
[0013]
Claim 4 is a buoy formed by using the water-resistant phosphorescent pigment-containing resin composition according to claims 1 to 3.
The buoy according to the present invention kneads the phosphorescent pigment in the resin in advance, so that the phosphorescent pigment is coated with a thermoplastic resin to block contact with the outside air and prevents moisture absorption, which is a drawback of the phosphorescent pigment. It is out. Moreover, the phosphorescent pigment strontium silicon aluminate used in the present invention is more water-resistant than the conventional phosphorescent pigment, so that the phosphorescent effect is not lowered at all even in a buoy that floats in seawater for a long time. can get.
[0014]
In addition, the form of the buoy shape | molded by this invention can be used for the various buoys manufactured conventionally, and the sealed hollow body manufactured using the thermoplastic resin is mentioned as the most typical example. And in this invention, it is a buoy formed by mix | blending and shape | molding a water-resistant phosphorescent pigment compounded resin composition in the layer used as the outer skin of a sealed hollow body. Therefore, there is no fear that the phosphorescent pigment peels off unlike the conventional product in which the phosphorescent pigment-containing paint is applied to the outer surface of the buoy.
[0015]
Claim 5 is a fishery rope formed by using the water-resistant phosphorescent pigment-containing resin composition according to claims 1 to 3.
The fishing net rope of the present invention can be used to manufacture various fishing ropes by changing the type of resin as needed and simultaneously changing the thickness of the rope, and the phosphorescent pigment is contained in the rope body. There is no worry of peeling off like a paint containing phosphorescent pigment.
[0016]
In the production of the water-resistant phosphorescent pigment-containing resin composition of the present invention, conventionally used equipment for producing a thermoplastic resin composition, for example, a mixin gall, a pressure kneader, an extruder or the like is used. What is necessary is just to manufacture by a normal method.
In the production of the resin composition, after producing a so-called master batch in which the amount of the phosphorescent pigment to the thermoplastic resin is increased, a water-resistant phosphorescent pigment resin composition diluted to the blending ratio of the present invention is produced. It ’s fine.
Similarly, in the manufacture of buoys and ropes, conventionally, a general-purpose blow molding machine, T-die molding machine, injection molding machine or the like may be arbitrarily used and molded by a usual method.
In addition, various additives such as antioxidants, pigments, antistatic agents, lubricants and the like may be arbitrarily blended in the water-resistant phosphorescent pigment-blended resin composition of the present invention as long as the properties are not impaired.
[0017]
Examples and comparative examples are described below.
Example 1 10 parts by weight of strontium silicon aluminate phosphorescent pigment having a mean particle size of 25 μm (product of Hikari Mas HG, TDO Graphics Co., Ltd.) was added to 100 parts by weight of low density polyethylene having an MI value of 2 and a low density of 0.92. -Is mixed, and this is kneaded at 160 ° C. using an L / D28, φ30 mm extruder to produce pellets of the water-resistant phosphorescent pigment-containing resin composition of the present invention.
The buoy using the resin composition pellets is manufactured by placing a parison extruded by an extruder between molds, blowing blown compressed air from a blow needle pierced into the parison, and then forming a blow needle. A spherical product having an outer diameter of 30 cm and a wall thickness of 5 mm is obtained by closing the blow through.
The presence of the buoy is clearly recognized even in dark places in the ocean at night.
[0018]
Next, regarding the water-resistant phosphorescent pigment-containing resin composition obtained in Example 1, the following (1) dispersibility, (2) afterglow performance over time, (3) color transfer and (4) water resistance are as follows. The results are shown in Table 1.
In addition, the measurement sheet | seat used in the case of each evaluation used the sheet | seat of 50x150x2 mm which created the resin composition obtained by each Example or the comparative example using the heating press.
[0019]
(1) The dispersibility of the phosphorescent pigment in the dispersible thermoplastic resin is visually determined using a measurement sheet.
Measure according to the following criteria.
◎ ... Good,
○ ……… Almost good,
△ ...
× ……… Bad.
[0020]
(2) The afterglow performance measurement sheet was left in the dark for about 15 hours to erase the afterglow, and then stimulated with a D65 standard light source at a brightness of 200 lux for 10 minutes. The light property is evaluated visually according to the following criteria.
◎ ... very good,
○ ……… Good,
△ ……… Slightly good,
× ……… Bad.
[0021]
(3) After the white sheet is laminated on the transferability measurement sheet, the whole is applied with a weight of 100 g, heated to 70 ° C. and allowed to stand for 2 days, and the color transfer to the white sheet is performed. Check for presence.
◎ ………… Migration, no,
○ ………… Migration, somewhat,
×: The transferability is remarkable.
[0022]
(4) After immersing the water resistance measurement sheet in water for one week, the afterglow performance over time of this measurement sheet is determined by the method of (2), that is, the measurement sheet is left in the dark for about 15 hours. After erasing the afterglow, stimulated with a D65 standard light source at a brightness of 200 lux for 10 minutes, visually comparing the phosphorescence and temporal afterglow immediately after that, compared with the measurement sheet before the water resistance test,
Evaluation is based on the following criteria.
◎ …… Not the same as before the water resistance test ○ …… Slightly lower than before the water resistance test × …… Much lower than before the water resistance test.
[0023]
[Table 1]
Figure 2005008687
[0024]
Hereinafter, as in Example 1, Examples 2 to 4 and Comparative Examples 1 to 8 were also measured by the evaluation methods (1), (2) and (3) above, and the results are shown in Table 1. .
[0025]
Example 2 To 100 parts by weight of polypropylene having an MI value of 2 and a density of 0.98, 15 parts by weight of a strontium silicon aluminate phosphorescent pigment (TDO Graphics Co., Ltd. product Hikari Mass ST) having an average particle diameter of 20 μm was used. These are mixed and kneaded at 230 ° C. using an L / D28, φ30 mm extruder to produce pellets of the water-resistant phosphorescent pigment-containing resin composition of the present invention.
The buoy using the resin composition is manufactured by placing a parison extruded by an extruder between molds, blowing blown air from a blow needle pierced into the parison, and then molding the blow needle. Then, the hole penetrated is closed to obtain a spherical product having a thickness of 5 mm and a diameter of 30 cm.
The presence of the buoy is clearly recognized even in dark places in the ocean at night.
[0026]
Example 3 15 parts by weight of strontium silicon aluminate phosphorescent pigment (TDO Graphics Co., Ltd. product Hikari Mass HG) having an average particle size of 20 μm was added to 100 parts by weight of impact-resistant polystyrene (trade name IT41, Idemitsu Petrochemical Co., Ltd.) -Is mixed, and this is kneaded at 200 ° C. using an L / D28, φ30 mm extruder to produce pellets of the water-resistant phosphorescent pigment-containing resin composition of the present invention. A road guidance display board is manufactured by an injection molding machine using the pellets of the resin composition.
The presence of the road guidance display board is clearly recognized from a distance even in a dark place at night.
[0027]
Example 4 Polycarbonate resin (Mitsubishi Kasei Co., Ltd., trade name: Novarex 7022PT) 15 parts by weight of strontium silicon aluminate phosphorescent pigment (TDO Graphics Co., Ltd. product Hikari Mas ST) having an average particle size of 20 μm Are mixed using a tumbler and kneaded at 280 ° C. using an L / D28, φ30 mm extruder to produce the water-resistant phosphorescent pigment-containing resin composition pellets of the present invention. Using the resin composition, buttons used for a mobile phone are manufactured by an injection molding machine. This button can be clearly identified even in the dark at night.
[0028]
Comparative Example 1 The same as Example 1 except that the amount of the strontium silicon aluminate phosphorescent pigment used in Example 1 was 0.5 parts by weight.
Comparative Example 2 The same as Example 1 except that the amount of the strontium silicon aluminate phosphorescent pigment used in Example 1 was 40 parts by weight.
Comparative Example 3 The same as Example 1 except that the average particle size of the strontium silicon aluminate phosphorescent pigment used in Example 1 is 0.5 μm.
Comparative Example 4 The same as Example 1, except that the average particle diameter of the strontium silicon aluminate phosphorescent pigment used in Example 1 is 200 μm.
[0029]
Comparative Example 5 The same as Example 1 except that strontium aluminate is used in place of the silicon strontium aluminate phosphorescent pigment used in Example 1.
Comparative Example 6 The same as Example 4 except that the amount of the strontium silicon aluminate phosphorescent pigment used in Example 4 was 0.5 parts by weight.
Comparative Example 7 The same as Example 4 except that the amount of strontium silicon aluminate phosphorescent pigment used in Example 4 was 40 parts by weight.
Comparative Example 8 The same as Example 4 except that the average particle diameter of the strontium silicon aluminate phosphorescent pigment used in Example 4 is 0.5 μm.
Comparative Example 9 The same as Example 4, except that the average particle diameter of the strontium silicon aluminate phosphorescent pigment used in Example 4 is 200 μm.
[0030]
【The invention's effect】
The water-resistant phosphorescent pigment-containing resin composition of the present invention uses an alkali rare earth silicon aluminate phosphorescent pigment rich in glitter, water resistance and weather resistance as the phosphorescent pigment, and further, the phosphorescent pigment is blended in the resin. Yes.
Therefore, unlike conventional products in which phosphorescent pigment is blended in paint, the phosphorescent pigment used in the present invention has no fear of decomposing even in a buoy floating in seawater. Therefore, its existence can be easily confirmed.
In addition, as a molded article using the light-resistant phosphorescent pigment-containing resin composition of the present invention, not only molded articles on the sea such as buoys and fishing nets, but also devices and instruments that need to be identified even in the dark at night in urban areas For example, if it is used for a marker mark attached to the top of a fire hydrant, it greatly contributes to the confirmation of the fire hydrant.

Claims (5)

熱可塑性樹脂100重量部に、平均粒径1〜150μmのアルカリ稀土珪素アルミン酸塩蓄光顔料1〜30重量部を配合してなる耐水性蓄光顔料配合樹脂組成物。A water-resistant phosphorescent pigment-containing resin composition comprising 100 parts by weight of a thermoplastic resin and 1 to 30 parts by weight of an alkali rare earth silicon aluminate phosphorescent pigment having an average particle diameter of 1 to 150 μm. 請求項1記載のアルカリ稀土珪素アルミン酸塩蓄光顔料が、珪素アルミン酸ストロンチウムを主成分とする蓄光顔料である耐水性蓄光顔料配合樹脂組成物。A water-resistant phosphorescent pigment-containing resin composition, wherein the alkali rare earth silicon aluminate phosphorescent pigment according to claim 1 is a phosphorescent pigment mainly composed of strontium silicon aluminate. 請求項1記載の熱可塑性樹脂が、ポリエチレンである耐水性蓄光顔料配合樹脂組成物。A water-resistant phosphorescent pigment-containing resin composition, wherein the thermoplastic resin according to claim 1 is polyethylene. 請求項1〜3記載の耐水性蓄光顔料配合樹脂組成物を用い、成形してなる浮標。A buoy formed by using the water-resistant phosphorescent pigment-containing resin composition according to claim 1. 請求項1〜3記載の耐水性蓄光顔料配合樹脂組成物を用い、成形してなる漁業用ロ−プ。A fishing rope formed by using the water-resistant phosphorescent pigment-containing resin composition according to claim 1.
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ITBS20090015A1 (en) * 2009-02-03 2010-08-04 Miplast S R L COMPOSITION FOR A PHOSPHORESCENT PLASTIC RESIN AND OBJECTS OR PARTS OF OBJECTS MADE WITH THIS, IN PARTICULAR VASES
EP2781650A1 (en) * 2013-03-22 2014-09-24 Lankhorst Euronete Portugal, S.A. Light emitting ropes and use thereof

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JPH11255182A (en) * 1998-03-12 1999-09-21 Nishida Kagaku Kogyosho:Kk Floating mark
JP2000119532A (en) * 1998-10-14 2000-04-25 Teijin Chem Ltd Heat-shrinkable tube of luminous thermoplastic resin
JP2001329138A (en) * 2000-05-22 2001-11-27 Mitsubishi Rayon Co Ltd Molded product of methacrylic resin, method for producing the same, and display
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ITBS20090015A1 (en) * 2009-02-03 2010-08-04 Miplast S R L COMPOSITION FOR A PHOSPHORESCENT PLASTIC RESIN AND OBJECTS OR PARTS OF OBJECTS MADE WITH THIS, IN PARTICULAR VASES
EP2781650A1 (en) * 2013-03-22 2014-09-24 Lankhorst Euronete Portugal, S.A. Light emitting ropes and use thereof

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