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JP3945262B2 - Writing instrument - Google Patents
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JP3945262B2 - Writing instrument - Google Patents

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Publication number
JP3945262B2
JP3945262B2 JP2002024016A JP2002024016A JP3945262B2 JP 3945262 B2 JP3945262 B2 JP 3945262B2 JP 2002024016 A JP2002024016 A JP 2002024016A JP 2002024016 A JP2002024016 A JP 2002024016A JP 3945262 B2 JP3945262 B2 JP 3945262B2
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Japan
Prior art keywords
ink
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titanium oxide
writing instrument
blue
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JP2002024016A
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JP2003226090A (en
Inventor
淳 金澤
克二 有澤
裕志 宮下
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Pentel Co Ltd
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Pentel Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、内部に自由状態でインキを収容するインキタンクの、少なくとも壁の一部を内部が透視可能な透明又は半透明の合成樹脂にて形成した筆記具に関する。
【0002】
【従来の技術】
筆記具、特にボールペンはボールと、これを保持するチップ、更にチップに結合されたインキ収容管にインキが充填されている。この状態をリフィルと呼んでいる。このインキがチップを経てボールに供給し紙面等に塗布(筆記)する。勿論チップ及びインキ収容管は細いので、該チップを固定すると共に指で筆記するのに適当な太さのホルダーを取り付けて構成される。インキ収容管の多くは、インキの使用によってインキ量が減ることが分かるように透明あるいは半透明なものが多く使用される。
【0003】
筆記具インキの着色剤が染料の場合、そのインキ色の外観は例えば黒、赤、青、緑インキでも、見かけ上は、殆ど黒色に近い色を呈色している。また、顔料を使用した場合でも暖色系の色はともかく、寒色である青、紫、藍、緑色についてはやはり、そのインキの外観色は、どれも黒色に近く、区別しづらいという問題点があった。そこで、インキ収容管を有機顔料等で着色してインキ色と同じ外観色にする方法が採られている。
【0004】
また特開平11−334275号公報にはボールペン用のインキ収容管の管構成樹脂中に光を散乱させる微粒子を含有させ且つ光の透過を可能としたボールペン用のインキ収容管が、特開平11−342693号公報にはボールペン用のインキ収容管の外面及び/又は内面に光を散乱させる粒子を含有し、且つ光の透過が可能な薄膜を形成させてなるボールペン用のインキ収容管が夫々記載されており、光を散乱させる微粒子が可視光の短波長(400〜500nm)側の波長をより強く散乱しインキ収容管の外観が青色呈色となることが開示されている。特開平11−342694号公報にはインキ収容管に、フッ素樹脂を使用することによりフッ素樹脂の結晶部、非結晶部の差より、可視光の短波長(400〜500nm)側の波長の散乱光がより強く散乱し、リフィルの外観が青色呈色となることが開示されている。
【0005】
【発明が解決しようとする課題】
上記従来技術で示されるインキ収容管を有機顔料等で着色する方法では、インキ収容管の外観色が筆跡色と同程度になるまで着色すると透明性がなくなりインキ残量が確認できないと言う問題があった。また、透明性を保つために、インキ収容管を半透明フッ素樹脂で作製したり、ボールペン用のインキ収容管の管構成樹脂中に光を散乱させる微粒子を含有させたりして、可視光の短波長側(400〜500nm)の波長を強く散乱する方法では、散乱する光の波長をコントロールできず、青以外の色に呈色することができず、青以外のインキを充填した場合、筆跡の色とリフィル外観色が一致しないという問題点があった。また、僅かながらも可視光の長波長側を散乱してしまうため、リフィル外観が白っぽくなり鮮明でないという問題点があった。
【0006】
【課題を解決するための手段】
即ち、本発明は、内部に自由状態でインキを収容するインキタンクの、少なくとも壁の一部を内部が透視可能な透明又は半透明の合成樹脂にて形成した筆記具において、前記インキタンク内にインキのY値が5%以下のインキを収容し、前記透明又は半透明の合成樹脂に酸化チタンの被覆率が40%以上のパール顔料を、少なくとも内部にインキが収容されていることの視認性を損なわない範囲の量分散含有させた筆記具を要旨とする。
【0007】
以下、本発明を詳細に説明する。本発明のインキ収容管に使用する酸化チタンの被覆率が40%以上のパール顔料は、外観色が暗色のインキ、即ち、Y値が5%以下のインキを充填したときのリフィル外観色を鮮やかなパール光沢を持った色に呈色すること、特に、顔料を選択することで、インキ色と同系色に外観色を呈することを目的として使用する。ここでパール光沢とは、真珠やあわび貝などが放つ柔らかな美しい輝きの光沢を指す。これは、光の多重反射によって起こるものである。
パール顔料には、魚鱗箔のような天然品と、塩基性炭酸鉛、オキシ塩化ビスマス、天然マイカの表面を金属酸化物で被覆したもの及び合成マイカの表面を金属酸化物で被覆したもののような合成品とがある。一般的には、入手しやすさと安全性の面から、天然マイカの表面を金属酸化物で被覆したものや、合成マイカの表面を金属酸化物で被覆したものが多く使用されている。なお、上記金属酸化物として、酸化チタン、酸化アルミニウム、酸化鉄、酸化クロム、チタン酸コバルトなどが挙げられる。一般的には、入手しやすさと、被覆率のコントロールしやすさの面から、酸化チタンが多く使用されている。パール顔料における色調は、金属酸化物の被覆率によってコントロールできる。例えば、金属酸化物として酸化チタンを用いた場合、酸化チタンの被覆率が40%以下の場合、その色調は白銀色となるが、本発明に用いるパール顔料は、その被覆率が40%以上更に好ましくは43%以上のものを好適に使用するものであり、酸化チタンの膜厚により入射光の内の一部の波長領域の光が反射し、一方その補色に当たる波長領域の光が透過して、それぞれ反射色と透過色になる。
【0008】
市販されているパール顔料としては、Iriodin201(酸化チタン被覆率57%、粒子径5〜25μm、干渉色・金色)、同211(同58%、同5〜25μm、干渉色・赤紫)、同221(同62%、同5〜25μm、干渉色・青色)、同223(同60%、同5〜25μm、干渉色・紫色)、同231(同68%、同5〜25μm、干渉色・緑色)、同225(同52%、同10〜60μm、干渉色・青色)、同235(同57%、10〜60μm、干渉色・緑色)(以上、メルクジャパン(株)製)や、PEARL−GRAZE MB−100R(同52%、同10〜60μm、干渉色・青色)、同MB−100RL(同52%、同10〜125μm、干渉色・青色)、同MG−100R(同57%、同10〜60μm、干渉色・緑色)、同MV−100R(同48%、同10〜60μm、干渉色・紫色)、同MR−100R(同47%、同10〜60μm、干渉色・赤色)、同MB−100RF(同62%、同5〜30μm、干渉色・青色)、同MG−100RF(同65%、同5〜30μm、干渉色・緑色)、ULTIMICA YB−100(同43%、同5〜30μm、干渉色・金色)、同YD−100(同43%、同10〜60μm、干渉色・金色)、同YE−100(同43%、同15〜100μm、干渉色・金色)、同YF−100(同43%、同44〜150μm、干渉色・金色)、同RB−100(同47%、同5〜30μm、干渉色・赤色)、同RD−100(同47%、同10〜60μm、干渉色・赤色)、同RE−100(同47%、同15〜100μm、干渉色・赤色)、同RF−100(同47%、同44〜150μm、干渉色・赤色)同VB−100(同48%、同5〜30μm、干渉色・紫色)、同VD−100(同48%、同10〜60μm、干渉色・紫色)、同VE−100(同48%、同15〜100μm、干渉色・紫色)同VF−100(同48%、同44〜150μm、干渉色・紫色)、同BB−100(同52%、同5〜30μm、干渉色・青色)、BD−100(同52%、同10〜60μm、干渉色・青色)、BE−100(同52%、同15〜100μm、干渉色・青色)、BF−100(同52%、同44〜150μm、干渉色・青色)、同GB−100(同65%、同5〜30μm、干渉色・緑色)、同GD−100(同65%、同10〜60μm、干渉色・緑色)、同GE−100(同65%、同15〜100μm、干渉色・緑色)、同GF−100(同65%、同44〜150μm、干渉色・緑色)(以上、日本光研(株)製)がある。パール顔料は、単独でも2種以上併合しても使用できる。このような本発明のパール顔料の酸化チタン被覆率が40%以下の場合、反射光が多くなる。このようなパール顔料を用いてインキ収容管を作製した場合、インキ収容管は白く濁った外観を呈する。よって酸化チタン被覆率は40%より大きいことが好ましい。酸化チタンの被覆率が40%以上のパール顔料の場合、屈折率の異なる平行な面での規則的な多重反射によって反射光がでるため、粒子径が5μmより小さいと反射光が弱くなる。また、粒子径が150μmより大きいと、反射光が強くなりすぎ、インキ残量確認が困難となる。従って、その粒子径は5μm以上150μm以下が好ましい。また、このような本発明に使用される酸化チタンの被覆率が40%以上のパール顔料の使用量は、インキ収容管全量に対して0.05〜10重量%の範囲で使用されるのが好ましい。これは、酸化チタンの被覆率が40%以上のパール顔料使用量が0.05重量%より少ない場合では反射光が弱くなり、10重量%より多い場合では反射光が強くなりすぎてインキ残量確認が困難になるためである。
【0009】
本発明で使用するインキ収容管の管を構成する樹脂としては、充填される筆記具用インキに対して変形したり膨潤したりすることがなく、耐性があり、インキを充填した量が確認できる透明性があればよい。具体的には、ポリプロピレン、ポリエチレン、ポリアクリロニトリル系熱可塑性樹脂、ポリエチレンテレフタレート、ポリアリレート、エチレンビニルアルコールコポリマー等の熱可塑性樹脂が使用可能であるが、特にポリプロピレンが安価で、透明度もあり、適度な強度・硬度もあり、また溶剤の透過性も少なく好適である。
【0010】
本発明で使用する筆記具用インキは水性インキ、油性インキを問わないが、特に、着色剤を多く含んでおり、インキのY値の低い、5%以下である油性ボールペンインキの時に著しく効果を示す。また、インキ収容管の外観色と、筆記描線の色が同系統の色を用いることがより好適である。
インキのY値とは、反射率(%)で、目で見た場合の明るさを表す。数値が大きくなればより白くなり、数値が小さくなればより黒に近くなる。本発明では、インキを、内径32.5mmのガラス製シャーレに1.5mmの高さになるように入れ、カラーコンピューターSM−5(須賀試験器(株)製)によりY値を測定した。Y値が5.0%以下の時に透過光がインキに充分に吸収され、反射光が鮮明になる。
【0011】
【作用】
パール顔料は薄板状雲母粒子などの表面を金属酸化物で被覆したものであり、この粒子は層状構造を有しており、これにより光が多重層反射され、特定の波長のみを反射し、その補色に当たる波長の光を透過させる。このようなパール顔料を充填した材料で成形したインキ収容管にインキを充填した場合、インキ収容管に入射した光は、反射光と透過光に分かれる。透過光があることより内部を透視できるし、また、反射された特定の波長の光は多重層反射により強調され、鮮明な外観を与えることができる。
さらに、Y値が5%以下である黒色に近いインキを充填することにより、透過光はインキ色に吸収されて、元来の反射色がリフィル外観色として認識され、リフィル外観は更に鮮明となる。また、反射光の波長即ち反射色は、パール顔料表面に被覆されている金属酸化物の層の厚さによってコントロールすることができる。よって、筆跡の色とリフィル外観色とを一致させることができるものである。
【0012】
【実施例】
以下に本発明の実施例を示すが、本発明はこれに限定されるものではない。
(実施例1)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE MB−100RL(酸化チタン被覆率52%、粒子径10〜125μm、干渉色青)を0.25重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ぺんてる(株)製のジョブ青インキ(製品符号BK101−C、Y値:0.98%)を充填し、ボールペンリフィル(A)を得た。
【0013】
(実施例2)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE MG−100R(酸化チタン被覆率57%、粒子径10〜60μm、干渉色緑)を1.50重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ドキュメンタル社製緑インキ(製品符号FKS41/10、Y値:1.15%)を充填し、ボールペンリフィル(B)を得た。
【0014】
(実施例3)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE MR−100R(酸化チタン被覆率47%、粒子径10〜60μm、干渉色赤)を3.60重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これにぺんてる(株)製のジョブ赤インキ(製品符号BK101−B、Y値:1.21%)を充填し、ボールペンリフィル(C)を得た。
【0015】
(実施例4)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE MB−100RL(酸化チタン被覆率52%、粒子径10〜125μm、干渉色青)を0.05重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ぺんてる(株)製のジョブ青インキ(製品符号BK101−C、Y値:0.98%)を充填し、ボールペンリフィル(D)を得た。
【0016】
(実施例5)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE MG−100R(酸化チタン被覆率57%、粒子径10〜60μm、干渉色緑)を8.0重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管(E)を得た。これに、ドキュメンタル社製の緑インキ(製品符号FKS41/10、Y値:1.15%)を充填し、ボールペンリフィル(E)を得た。
【0017】
(実施例6)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE MB−100RL(酸化チタン被覆率52%、粒子径10〜125μm、干渉色青)を2.48重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、以下の成分をロールで分散して得られた青インキ(Y値:4.29%)を充填してボールペンリフィル(F)を得た。
ファストゲンブルーGP(大日本インキ化学(株)製) 25.0重量%
ディスパロンDA−375(楠本化成(株)製) 12.5重量%
PVP K−90 0.5重量%
オレイン酸 3.0重量%
フェニルセロソルブ 40.0重量%
ベンジルアルコール 6.5重量%
【0018】
(実施例7)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE MB−100RL(酸化チタン被覆率52%、粒子径10〜125μm、干渉色青)を0.01重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これにぺんてる(株)製ジョブ青インキ(製品符号BK101−C、Y値:0.98%)を充填し、ボールペンリフィル(G)を得た。
【0019】
(実施例8)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE MG−100R(酸化チタン被覆率57%、粒子径10〜60μm、干渉色緑)を20重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これにドキュメンタル社製緑インキ(製品符号FKS41/10、Y値:1.15%)を充填し、ボールペンリフィル(H)を得た。
【0020】
(比較例1)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)を230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ぺんてる(株)製のジョブ青インキ(製品符号BK101−C、Y値:0.98%)を充填し、ボールペンリフィル(K)を得た。
【0021】
(比較例2)
ポリテトラフルオロエチレン−パーフルオロアルコキシエチレン共重合体(アフロンPFA P−65、旭硝子(株)製)を320℃に加熱した後、引
張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ぺんてる(株)製のジョブ赤インキ(製品符号BK101−B、Y値:1.21%)を充填し、ボールペンリフィル(L)を得た。
【0022】
(比較例3)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)に微粒子酸化チタンMT−500HD(0.03μm、テイカ(株)製)を0.25重量%混合して、230℃に加熱した後、引張り速度40m/分押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ドキュメンタル社製緑インキ(製品符号FKS41/10、Y値:1.15%)を充填し、ボールペンリフィル(M)を得た。
【0023】
(比較例4)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にファストゲンブルーGP(大日本インキ化学(株)製)を5.0重量%混合して、230℃に加熱した後、引張り速度40m/分押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ぺんてる(株)製のジョブ青インキ(製品符号BK101−C、Y値:0.98%)を充填し、ボールペンリフィル(N)を得た。
【0024】
(比較例5)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料 PEARL−GRAZE Iridodin289FlashInterferenceBlue(酸化チタン被覆率34%、粒子径10〜125μm、干渉色・青)を0.25重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ぺんてる(株)製のジョブ青インキ(製品符号BK101−C、Y値:0.98)を充填し、ボールペンリフィル(J)を得た。
【0025】
(比較例6)
ポリプロピレン樹脂(サンアロマーPE−400Y、モンテル・エスディーケイ・サンライズ(株)製)にパール顔料PEARL−GRAZE MR−100R(酸化チタン被覆率47%、粒子径10〜60μm、干渉色赤)を5.0重量%混合して、230℃に加熱した後、引張り速度40m/分で押し出し成形を行い、外径3mm、内径1.7mm、長さ12.5cmの半透明インキ収容管を得た。これに、ぺんてる(株)製のハイブリッド赤インキ(製品符号KFG4、Y値:22.58%)を充填し、ボールペンリフィル(I)を得た。
【0026】
実施例ボールペンリフィルA、B、C、D、E、F、G及びH、比較例ボールペンリフィルI、J、K、L、M及びNを試験サンプルとし、外観色及びパール光沢の有無を目視で確認した。また、試験サンプル中のインキを内径32.5mmのシャーレに1.5mmの高さで充填したときのY値を測定した。結果を表1に示す。本試験においては、カラーコンピューターSM−5(須賀試験器(株)製)によりY値を測定した。
【0027】
【表1】
【0028】
【発明の効果】
以上、詳細に説明したように、筆記具用インキ収容管は、インキ残量が確認でき、鮮明なリフィル外観を呈色することができると共に、パール顔料を適宜選択することでリフィル外観色を変化させることができ、インキ外観が黒色に近いインキを充填することで、より鮮明且つリフィルの外観色と筆記描線との色合いが一致させることができ、その筆記具のインキ色を外観から見ただけで認識できる。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a writing instrument in which at least a part of a wall of an ink tank that accommodates ink in a free state is formed of a transparent or translucent synthetic resin through which the inside can be seen through.
[0002]
[Prior art]
A writing instrument, particularly a ballpoint pen, is filled with ink in a ball, a chip for holding the ball, and an ink containing tube coupled to the chip. This state is called refill. This ink is supplied to the ball through the chip and applied (written) on the paper surface. Of course, since the tip and the ink storage tube are thin, the tip is fixed and a holder having a thickness suitable for writing with a finger is attached. Most of the ink storage tubes are transparent or translucent so that the amount of ink can be reduced by using the ink.
[0003]
When the colorant of the writing instrument ink is a dye, the appearance of the ink color is, for example, black, red, blue, and green ink, and the appearance is almost black. Even when pigments are used, regardless of the warm colors, the colors blue, purple, indigo and green, which are cold colors, are all black and are difficult to distinguish. It was. Therefore, a method has been adopted in which the ink containing tube is colored with an organic pigment or the like so as to have the same appearance color as the ink color.
[0004]
Japanese Laid-Open Patent Publication No. 11-334275 discloses an ink storage tube for a ballpoint pen which contains fine particles that scatter light in the tube-constituting resin of the ink storage tube for a ballpoint pen and enables light transmission. Japanese Patent No. 334293 discloses ink storage tubes for ballpoint pens, each of which contains particles that scatter light on the outer surface and / or the inner surface of the ink storage tube for ballpoint pens, and in which a thin film capable of transmitting light is formed. It is disclosed that fine particles that scatter light scatter the wavelength of visible light on the short wavelength side (400 to 500 nm) more strongly, and the appearance of the ink containing tube becomes blue. In JP-A-11-342694, scattered light having a wavelength on the short wavelength (400 to 500 nm) side of visible light due to the difference between the crystal part and the non-crystal part of the fluororesin by using a fluororesin in the ink containing tube. Are more strongly scattered and the refill appearance is blue.
[0005]
[Problems to be solved by the invention]
In the method of coloring the ink containing tube shown in the above prior art with an organic pigment or the like, there is a problem that when the appearance color of the ink containing tube is colored to the same level as the handwriting color, transparency is lost and the remaining amount of ink cannot be confirmed. there were. In addition, in order to maintain transparency, the ink containing tube is made of a semi-transparent fluororesin, or fine particles that scatter light are included in the tube constituent resin of the ink containing tube for ballpoint pens. In the method of strongly scattering the wavelength on the wavelength side (400 to 500 nm), the wavelength of the scattered light cannot be controlled, it cannot be colored in colors other than blue, and when ink other than blue is filled, There was a problem that the color and the refill appearance color did not match. Further, since the long wavelength side of visible light is scattered slightly, there is a problem that the refill appearance becomes whitish and is not clear.
[0006]
[Means for Solving the Problems]
That is, the present invention relates to a writing instrument in which at least a part of a wall is made of a transparent or translucent synthetic resin that can be seen through the inside of an ink tank that contains ink in a free state inside the ink tank. The Y value of 5% or less is accommodated, the pearl pigment having a titanium oxide coverage of 40% or more is contained in the transparent or translucent synthetic resin, and at least the visibility that the ink is accommodated in the interior is provided. The gist of the writing instrument is dispersed in an amount that does not impair it.
[0007]
Hereinafter, the present invention will be described in detail. The pearl pigment with a titanium oxide coverage of 40% or more used in the ink containing tube of the present invention has a bright refill appearance color when filled with dark-colored ink, that is, ink with a Y value of 5% or less. It is used for the purpose of exhibiting an appearance color similar to the ink color by selecting a pigment, particularly by selecting a pigment. Here, pearl luster refers to the soft, beautiful luster of pearls and abalone shells. This is caused by multiple reflection of light.
Pearl pigments include natural products such as fish scale foil, basic lead carbonate, bismuth oxychloride, natural mica surfaces coated with metal oxides, and synthetic mica surfaces coated with metal oxides. There is a synthetic product. In general, from the viewpoint of availability and safety, a natural mica surface coated with a metal oxide and a synthetic mica surface coated with a metal oxide are often used. Examples of the metal oxide include titanium oxide, aluminum oxide, iron oxide, chromium oxide, and cobalt titanate. In general, titanium oxide is often used in terms of availability and ease of control of the coverage. The color tone of the pearl pigment can be controlled by the metal oxide coverage. For example, when titanium oxide is used as the metal oxide, when the titanium oxide coverage is 40% or less, the color tone is white silver, but the pearl pigment used in the present invention has a coverage of 40% or more. Preferably, 43% or more is preferably used, and the light of a part of the wavelength region of the incident light is reflected by the film thickness of the titanium oxide, while the light of the wavelength region corresponding to the complementary color is transmitted. , It becomes a reflection color and a transmission color, respectively.
[0008]
Commercially available pearl pigments include Iriodin 201 (titanium oxide coverage 57%, particle size 5-25 μm, interference color / gold), 211 (58%, 5-25 μm, interference color / purple), 221 (62%, 5-25 μm, interference color / blue), 223 (60%, 5-25 μm, interference color / purple), 231 (68%, 5-25 μm, interference color / blue) Green), 225 (52%, 10-60 μm, interference color / blue), 235 (57%, 10-60 μm, interference color / green) (Merck Japan Co., Ltd.), PEARL -GRAZE MB-100R (52%, 10-60 μm, interference color / blue), MB-100RL (52%, 10-125 μm, interference color / blue), MG-100R (57%, same) 10 ~ 60μm, interference color / green) Same MV-100R (48%, same 10-60μm, interference color / purple), MR-100R (47%, same 10-60μm, interference color / red), MB-100RF (62%, same) 5-30 μm, interference color / blue), MG-100RF (65%, same 5-30 μm, interference color / green), ULTIMICA YB-100 (43%, same 5-30 μm, interference color / gold), YD-100 (43%, 10-60 μm, interference color / gold) YE-100 (43%, 15-100 μm, interference color / gold), YF-100 (43%, 43%, same color) 44-150 μm, interference color / gold), RB-100 (47%, 5-30 μm, interference color / red), RD-100 (47%, 10-60 μm, interference color / red), RE-100 (47%, 15-100 μm, interference) Color / red), RF-100 (47%, 44-150 μm, interference color / red) VB-100 (48%, 5-30 μm, interference color / purple), VD-100 (same as above) 48%, 10-60 μm, interference color / purple), VE-100 (48%, 15-100 μm, interference color / purple) VF-100 (48%, 44-150 μm, interference color) Purple), BB-100 (52%, 5-30 μm, interference color / blue), BD-100 (52%, 10-60 μm, interference color / blue), BE-100 (52%, 52%, 15-100 μm, interference color / blue), BF-100 (52%, 44-150 μm, interference color / blue), GB-100 (65%, 5-30 μm, interference color / green), GD-100 (65%, 10-60 μm, interference color / green), GE- 100 (65%, 15-15 μm, interference color / green) and GF-100 (65%, 44-150 μm, interference color / green) (Nippon Koken Co., Ltd.). Pearl pigments can be used alone or in combination of two or more. When the titanium oxide coverage of the pearl pigment of the present invention is 40% or less, the reflected light increases. When an ink storage tube is produced using such a pearl pigment, the ink storage tube has a white and cloudy appearance. Therefore, the titanium oxide coverage is preferably greater than 40%. In the case of a pearl pigment having a titanium oxide coverage of 40% or more, reflected light is generated by regular multiple reflection on parallel surfaces having different refractive indexes. Therefore, when the particle diameter is smaller than 5 μm, the reflected light becomes weak. On the other hand, if the particle diameter is larger than 150 μm, the reflected light becomes too strong, making it difficult to check the remaining amount of ink. Therefore, the particle diameter is preferably 5 μm or more and 150 μm or less. The amount of the pearl pigment having a titanium oxide coverage of 40% or more used in the present invention is 0.05 to 10% by weight based on the total amount of the ink containing tube. preferable. This is because when the amount of the pearl pigment having a titanium oxide coverage of 40% or more is less than 0.05% by weight, the reflected light becomes weak, and when it is more than 10% by weight, the reflected light becomes too strong and the remaining ink amount. This is because confirmation becomes difficult.
[0009]
The resin constituting the tube of the ink containing tube used in the present invention is resistant to deformation and does not swell with respect to the ink for the writing instrument, and is transparent so that the amount of ink filled can be confirmed. It only has sex. Specifically, thermoplastic resins such as polypropylene, polyethylene, polyacrylonitrile-based thermoplastic resin, polyethylene terephthalate, polyarylate, and ethylene vinyl alcohol copolymer can be used, but polypropylene is particularly inexpensive, has transparency, and is suitable. It is suitable because of its strength and hardness and low solvent permeability.
[0010]
The ink for writing instruments used in the present invention may be either water-based ink or oil-based ink, but particularly contains a large amount of colorant and exhibits a remarkable effect when it is an oil-based ballpoint pen ink having a low Y value of 5% or less. . In addition, it is more preferable to use the same color for the appearance color of the ink storage tube and the color of the writing line.
The Y value of the ink is the reflectance (%) and represents the brightness when viewed with the eyes. The larger the number, the whiter the color, and the smaller the number, the closer it is to black. In the present invention, the ink was placed in a glass petri dish having an inner diameter of 32.5 mm so as to have a height of 1.5 mm, and the Y value was measured with a color computer SM-5 (manufactured by Suga Test Instruments Co., Ltd.). When the Y value is 5.0% or less, the transmitted light is sufficiently absorbed by the ink, and the reflected light becomes clear.
[0011]
[Action]
The pearl pigment is a thin mica particle or the like coated with a metal oxide on its surface, and this particle has a layered structure, whereby light is reflected in multiple layers and reflects only a specific wavelength. Transmits light having a wavelength corresponding to the complementary color. When ink is filled in an ink containing tube formed of a material filled with such a pearl pigment, light incident on the ink containing tube is divided into reflected light and transmitted light. The inside can be seen through due to the presence of transmitted light, and the reflected light of a specific wavelength can be emphasized by the multilayer reflection to give a clear appearance.
Furthermore, by filling the ink close to black with a Y value of 5% or less, the transmitted light is absorbed by the ink color, the original reflected color is recognized as the refill appearance color, and the refill appearance becomes clearer. . The wavelength of reflected light, that is, the reflected color, can be controlled by the thickness of the metal oxide layer coated on the pearl pigment surface. Therefore, the handwriting color and the refill appearance color can be matched.
[0012]
【Example】
Examples of the present invention are shown below, but the present invention is not limited thereto.
Example 1
A pearl pigment PEARL-GRAZE MB-100RL (titanium oxide coverage: 52%, particle size: 10 to 125 μm, interference color blue) is added to polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.). After mixing by weight% and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with Pentel Co., Ltd. job blue ink (product code BK101-C, Y value: 0.98%) to obtain a ballpoint pen refill (A).
[0013]
(Example 2)
1.50 pearl pigment PEARL-GRAZE MG-100R (titanium oxide coverage: 57%, particle size: 10-60 μm, interference color green) on polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) After mixing by weight% and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with documentary green ink (product code FKS41 / 10, Y value: 1.15%) to obtain a ballpoint pen refill (B).
[0014]
(Example 3)
A pearlescent pigment PEARL-GRAZE MR-100R (titanium oxide coverage: 47%, particle diameter: 10 to 60 μm, interference color red) is 3.60 on polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) After mixing by weight% and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with a job red ink (product code BK101-B, Y value: 1.21%) manufactured by Pentel Co., Ltd. to obtain a ballpoint pen refill (C).
[0015]
Example 4
A pearl pigment PEARL-GRAZE MB-100RL (titanium oxide coverage: 52%, particle diameter: 10 to 125 μm, interference color blue) is added to polypropylene resin (Sun Allomer PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) After mixing by weight% and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with a job blue ink (product code BK101-C, Y value: 0.98%) manufactured by Pentel Co., Ltd. to obtain a ballpoint pen refill (D).
[0016]
(Example 5)
A pearl pigment PEARL-GRAZE MG-100R (titanium oxide coverage: 57%, particle size: 10 to 60 μm, interference color green) is added to polypropylene resin (Sun Aroma PE-400Y, manufactured by Montelu SDK Sunrise Co., Ltd.). After mixing by weight% and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube (E) having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. . This was filled with documentary green ink (product code FKS41 / 10, Y value: 1.15%) to obtain a ballpoint pen refill (E).
[0017]
(Example 6)
A pearl pigment PEARL-GRAZE MB-100RL (titanium oxide coverage: 52%, particle diameter: 10 to 125 μm, interference color blue) is added to a polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) 2.48. After mixing by weight% and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with a blue ink (Y value: 4.29%) obtained by dispersing the following components with a roll to obtain a ballpoint refill (F).
Fastgen Blue GP (Dainippon Ink Chemical Co., Ltd.) 25.0% by weight
Dispalon DA-375 (Enomoto Kasei Co., Ltd.) 12.5% by weight
PVP K-90 0.5% by weight
Oleic acid 3.0% by weight
Phenylcellosolve 40.0% by weight
Benzyl alcohol 6.5% by weight
[0018]
(Example 7)
0.01% pearl pigment PEARL-GRAZE MB-100RL (titanium oxide coverage: 52%, particle size: 10 to 125 μm, interference color blue) on polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) After mixing by weight% and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with Pentel Co., Ltd. job blue ink (product code BK101-C, Y value: 0.98%) to obtain a ballpoint pen refill (G).
[0019]
(Example 8)
20% by weight of a pearlescent pigment PEARL-GRAZE MG-100R (titanium oxide coverage 57%, particle size 10-60 μm, interference color green) on polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) After mixing and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with documentary green ink (product code FKS41 / 10, Y value: 1.15%) to obtain a ballpoint pen refill (H).
[0020]
(Comparative Example 1)
After heating a polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) to 230 ° C., extrusion molding is performed at a pulling speed of 40 m / min, an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12 A 5 cm translucent ink containing tube was obtained. This was filled with Pentel Co., Ltd. job blue ink (product code BK101-C, Y value: 0.98%) to obtain a ballpoint pen refill (K).
[0021]
(Comparative Example 2)
A polytetrafluoroethylene-perfluoroalkoxyethylene copolymer (Aflon PFA P-65, manufactured by Asahi Glass Co., Ltd.) is heated to 320 ° C. and then extruded at a pulling rate of 40 m / min. A translucent ink containing tube having a length of 7 mm and a length of 12.5 cm was obtained. This was filled with a job red ink (product code BK101-B, Y value: 1.21%) manufactured by Pentel Co., Ltd. to obtain a ballpoint pen refill (L).
[0022]
(Comparative Example 3)
Mix 0.25% by weight of fine particle titanium oxide MT-500HD (0.03 μm, manufactured by Teika Co., Ltd.) with polypropylene resin (Sun Aroma PE-400Y, manufactured by Montelu SDK / Sunrise Co., Ltd.) at 230 ° C. After heating, extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with documentary green ink (product code FKS41 / 10, Y value: 1.15%) to obtain a ballpoint pen refill (M).
[0023]
(Comparative Example 4)
After mixing 5.0% by weight of Fastgen Blue GP (Dainippon Ink Chemical Co., Ltd.) with polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) and heating to 230 ° C. Then, extrusion was performed at a pulling speed of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with Pentel Co., Ltd. job blue ink (product code BK101-C, Y value: 0.98%) to obtain a ballpoint pen refill (N).
[0024]
(Comparative Example 5)
0.25 weight of pearl pigment PEARL-GRAze Iridodine 289 FlashInterferenceBlue (titanium oxide coverage 34%, particle size 10-125 μm, interference color / blue) on polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) % Was mixed and heated to 230 ° C., and extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with a job blue ink (product code BK101-C, Y value: 0.98) manufactured by Pentel Co., Ltd. to obtain a ballpoint pen refill (J).
[0025]
(Comparative Example 6)
A pearlescent pigment PEARL-GRAZE MR-100R (titanium oxide coverage: 47%, particle size: 10 to 60 μm, interference color red) is added to polypropylene resin (Sun Aroma PE-400Y, manufactured by Montel SDK Sunrise Co., Ltd.) After mixing by weight% and heating to 230 ° C., extrusion molding was performed at a pulling rate of 40 m / min to obtain a translucent ink containing tube having an outer diameter of 3 mm, an inner diameter of 1.7 mm, and a length of 12.5 cm. This was filled with a hybrid red ink (product code KFG4, Y value: 22.58%) manufactured by Pentel Co., Ltd. to obtain a ballpoint pen refill (I).
[0026]
Example Ballpoint pen refills A, B, C, D, E, F, G and H, Comparative Example Ballpoint pen refills I, J, K, L, M and N were used as test samples, and the appearance color and the presence or absence of pearl luster were visually observed. confirmed. Further, the Y value when the ink in the test sample was filled in a petri dish having an inner diameter of 32.5 mm at a height of 1.5 mm was measured. The results are shown in Table 1. In this test, the Y value was measured with a color computer SM-5 (manufactured by Suga Test Instruments Co., Ltd.).
[0027]
[Table 1]
[0028]
【The invention's effect】
As described above in detail, the ink storage tube for a writing instrument can confirm the remaining amount of ink, can display a clear refill appearance, and can change the refill appearance color by appropriately selecting a pearl pigment. By filling the ink with an ink appearance that is close to black, the refill appearance color can be matched with the color of the writing line, and the ink color of the writing instrument can be recognized just by looking at the appearance. it can.

Claims (5)

内部に自由状態でインキを収容するインキタンクの、少なくとも壁の一部を内部が透視可能な透明又は半透明の合成樹脂にて形成した筆記具において、前記インキタンク内にインキのY値が5%以下のインキを収容し、前記透明又は半透明の合成樹脂に酸化チタンの被覆率が40%以上のパール顔料を、少なくとも内部にインキが収容されていることの視認性を損なわない範囲の量分散含有させた筆記具。  In a writing instrument in which at least a part of the wall is made of a transparent or translucent synthetic resin that can see through the inside of an ink tank that contains ink in a free state inside, the Y value of the ink is 5% in the ink tank. The following ink is contained, and the pearl pigment having a titanium oxide covering ratio of 40% or more in the transparent or translucent synthetic resin is dispersed in such an amount that does not impair the visibility that the ink is contained at least inside. Writing instrument included. 前記酸化チタンの被覆率が40%以上のパール顔料が、天然マイカ又は合成マイカに酸化チタンを被覆又は付着させた複合顔料であることを特徴とする請求項1記載の筆記具。  The writing instrument according to claim 1, wherein the pearl pigment having a titanium oxide coverage of 40% or more is a composite pigment obtained by coating or adhering titanium oxide to natural mica or synthetic mica. 前記酸化チタンの被覆率が40%以上のパール顔料の粒子径が5〜150μmであることを特徴とする請求項1又は請求項2に記載の筆記具。  The writing instrument according to claim 1 or 2, wherein a particle diameter of the pearl pigment having a titanium oxide coverage of 40% or more is 5 to 150 µm. 前記酸化チタンの被覆率が40%以上のパール顔料がインキ収容管全量に対して0.05〜10重量%含有されていることを特徴とする請求項1ないし請求項3のいずれかに記載の筆記具。  The pearl pigment having a titanium oxide coverage of 40% or more is contained in an amount of 0.05 to 10% by weight based on the total amount of the ink containing tube. Writing instrument. 前記酸化チタンの被覆率が43%以上である請求項1ないし請求項4のいずれかに記載の筆記具。  The writing instrument according to any one of claims 1 to 4, wherein a coverage of the titanium oxide is 43% or more.
JP2002024016A 2002-01-31 2002-01-31 Writing instrument Expired - Lifetime JP3945262B2 (en)

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