JP2004052203A - Highly luminant and noctilucent fiber and highly luminant and noctilucent woven and knit fabric - Google Patents

Highly luminant and noctilucent fiber and highly luminant and noctilucent woven and knit fabric Download PDF

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Publication number
JP2004052203A
JP2004052203A JP2003013793A JP2003013793A JP2004052203A JP 2004052203 A JP2004052203 A JP 2004052203A JP 2003013793 A JP2003013793 A JP 2003013793A JP 2003013793 A JP2003013793 A JP 2003013793A JP 2004052203 A JP2004052203 A JP 2004052203A
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Prior art keywords
fiber
luminous
dyeing
noctilucent
component
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JP2003013793A
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JP4283000B2 (en
Inventor
Takeshi Shirai
白井 剛
Hideo Sakakura
坂倉 秀夫
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Mitsubishi Rayon Co Ltd
Mitsubishi Rayon Textile Co Ltd
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Mitsubishi Rayon Co Ltd
Mitsubishi Rayon Textile Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly luminant and noctilucent fiber and highly luminant and noctilucent woven and knit fabrics having sufficient luminance after dyeing and excellent in color fastness to lights. <P>SOLUTION: The highly luminant and noctilucent fiber is a core-sheath type conjugate fiber constituted of a core component comprising a polyester resin or a polyolefin resin containing a noctilucent pigment and a sheath component comprising a polyester resin containing no noctilucent pigment. The polyester resin constituting the sheath component contains 0.3-2.5 mole% copolymerized 5-sodium sulfoisophthalic acid and 3-15 mole% copolymerized adipic acid as acid components and has repeating units 82.5-96.7 mole% of which are ethylene terephthalate. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、染色後に高い発光輝度を有し、かつ染色後の耐光堅牢度が良好である衣料用編織物等の各種用途に適した高輝度夜光性繊維、および該夜光性繊維を少なくとも一部に用いた織編物に関する。
【0002】
【従来の技術】
従来から、各種繊維に多種多様な色彩効果を付与すべく、さまざまな材料による着色が施されてきた。特に近年では、着色材料として各種の機能性着色材料を用いることにより、繊維に高度の付加価値を付与することが試みられており、夜光性顔料もしくは蓄光顔料と称される発光性着色材料を含有する繊維もその一つに挙げられる。
【0003】
このような夜光性繊維として、特許文献1には硫化亜鉛を蓄光剤としたポリエステル繊維が提案されている。また特許文献2には、蓄光性蛍光体材料としてユウロピウム等を賦活したアルカリ土類金属のアルミン酸塩を用いた繊維が記載されており、繊維形成性樹脂としてポリエステルを用いることが記載されている。しかしながら、これらの方法では通常のポリエステル繊維の染色条件で染色した場合、蓄光性蛍光体材料が染色工程中で高温の熱水により加水分解して輝度特性が低下するという問題がある。
【0004】
【特許文献1】特開平2−112414号公報
【0005】
【特許文献2】特開平8−127937号公報
【0006】
【発明が解決しようとする課題】
本発明は、かかる従来技術の欠点を解決するものであって、染色後も十分な輝度を有し、耐光堅牢度に優れた高輝度夜光性繊維及び高輝度夜光性織編物を提供するものである。
【0007】
【課題を解決するための手段】
本発明の第1の要旨は、夜光性顔料を含有するポリエステル樹脂またはポリオレフィン樹脂からなる芯成分と、夜光性顔料を含有しないポリエステル樹脂からなる鞘成分とで構成された芯鞘型複合繊維であって、鞘成分を構成するポリエステル樹脂がジカルボン酸成分として、5−ナトリウムスルホイソフタル酸成分を0.3〜2.5モル%、アジピン酸成分を3〜15モル%共重合し、繰り返し単位の82.5〜96.7モル%がエチレンテレフタレートであることを特徴とする高輝度夜光性繊維にある。
【0008】
本発明の第2の要旨は、本発明の高輝度夜光性繊維を少なくとも一部に用いた織編物にある。
【0009】
【発明の実施の形態】
本発明では、夜光性顔料は芯成分に添加し、鞘成分を夜光性顔料を含有しない樹脂とし、製糸工程、加工工程等での夜光性顔料の脱落を防止することが必要である。
【0010】
また芯鞘比率は、製糸性、繊維物性の観点から容積比で芯鞘比率1/5〜2/1の範囲内が好ましい。芯鞘比率が1/5未満であると繊維中の夜光性顔料の含有量が少なくなり、繊維の輝度が不足しやすい。又、芯鞘比率が2/1を超えると、製糸性、製編製織等の後加工工程通過性が悪化しやすい。
【0011】
さらに芯成分の樹脂としては、芯鞘繊維の溶融紡糸の容易性からポリエステル樹脂またはポリオレフィン樹脂であることが必要である。なお、染色工程等熱水を使用する工程において、熱水を浸透しにくくするためにポリオレフィン樹脂が好ましく、融点80〜180℃、MFR1〜40g/10分のポリプロピレン樹脂であることがより好ましい。融点が80℃未満になると、染色工程において、熱水の温度で芯成分が融解しやすく、水が芯成分に浸透し易くなり、夜光性性能が低下しやすい。また、MFRが1〜40g/10分の範囲外になると、ポリエステルとの複合紡糸時の製糸安定性が低下しやすい。
【0012】
また、通常のポリエステル繊維の染色方法である、分散染料で染色する場合には、染色後の耐光堅牢度を維持するために110℃以上の高温での染色が必須となるが、夜光性顔料を添加した繊維の場合、高温の熱水により夜光性顔料が加水分解され輝度特性が大きく低下してしまう。
【0013】
本発明では、鞘成分をジカルボン酸成分として、5−ナトリウムスルホイソフタル酸成分とアジピン酸成分を共重合するポリエステル樹脂とすることによりカチオン染料により100℃以下の低温で染色が可能となる。分散染料に比べ低温で染色できることにより、夜光性顔料の分解を防ぎ染色後も十分な輝度特性が得られる。さらに、カチオン染料で染色することにより、鮮明性にも優れたものとなる。
【0014】
5−Naスルホイソフタル酸成分の共重合量は、0.3〜2.5モル%が必要であり、0.3モル%未満であるとカチオン染色性が低下し、2.5モル%を超えると、繊維強度が低下し、製糸安定性、加工工程通過性が不良となる。
【0015】
またアジピン酸成分の共重合量は、3〜15モル%が必要である。3モル%未満であるとカチオン染色性が低下し、15モル%を超えると、ポリマーのガラス転移温度が低下して未延伸糸の段階で単繊維同士が融着する。
【0016】
なお、本発明において、共重合させるアジピン酸成分は、ポリエステルポリマーを合成する任意の段階において添加できるが、テレフタル酸とエチレングリコールとのエステル化反応開始時にアジピン酸の粉体を添加する方法、およびテレフタル酸とエチレングリコールとのエステル化反応によって、またはジメチルテレフタレートとエチレングリコールとのエステル交換反応によって得られるビスヒドロキシエチルテレフタレートに、アジピン酸またはビス(2−ヒドロキシ)アジペートの分散液または溶液として添加する方法が一般的である。また、5−ナトリウムスルホイソフタル酸成分についても、アジピン酸と同様にポリマーを合成する任意の段階で添加でき、テレフタル酸とエチレングリコールとのエ
ステル化反応開始時に5−ナトリウムスルホイソフタル酸の粉体を添加する方法、及びジメチルテレフタレートとエチレングリコールとのエステル交換反応開始時にそれのジメチルエステルとして添加する方法が一般的である。
【0017】
また本発明に用いる夜光性顔料としては、硫化化合物を主体として各種金属を賦活してなる蓄光顔料、アルカリ土類金属のアルミン酸塩に希土類元素で賦活した蓄光性蛍光体材料等が挙げられ、化学的安定性、輝度特性の点からアルカリ土類金属のアルミン酸塩に希土類元素で賦活した蓄光性蛍光体材料が好ましい。
【0018】
さらに本発明では、染色後の耐光堅牢度が3級以上であって、染色後の励起停止から1分後の残光輝度が100mcd/m以上であることが好ましい。染色後の耐光堅牢度が3級未満では、製品使用時に変色が生じやすい。
【0019】
また、染色後の輝度特性については、励起停止から1分後の残光輝度が100mcd/m未満であると、染色後の輝度特性が不足しやすい。なお、染色後の励起停止から1分後の残光輝度を100mcd/m以上とするには、染色前の励起停止から1分後の残光輝度を500mcd/m以上とすることが好ましい。
【0020】
さらに本発明では、夜光性顔料の添加量は全繊維に対し7〜25重量%が好ましく、7重量%未満であると、染色前の段階で励起停止から1分後の残光輝度が500mcd/m未満となり、染色による光透過性の低下の影響で、染色した後の励起停止から1分後の残光輝度が、100mcd/m未満となりやすい。また、添加量が25重量%を超えると、製糸時に糸切れが多発しやすく、繊維化が困難となりやすい。
【0021】
また本発明で用いる夜光性顔料は、大粒径ほど高輝度となるが、製糸性、得られた夜光性繊維の強度低下等の繊維物性の観点から粒径が1〜15μmの範囲内のものが好ましい。夜光性顔料の粒径が1μm未満の場合は発光性能が不足しやすく、粒径が15μmを超える場合は、製糸性が低下しやすく、得られた夜光性繊維の繊維の強度が低くなり、また後加工工程通過性が低下しやすい。
【0022】
また、本発明の高輝度夜光性繊維の単繊維繊度は、40μm以下であることが好ましい。単繊維の太さが40μmを越えると、ソフトな風合いが不足しやすく刺繍糸または衣料用途等への使用が制限されやすい。
【0023】
なお、本発明の高輝度夜光性繊維の断面形状は、芯鞘構造であれば円形、三角等の異型、中空断面でも良く、そのトータル繊度は特に限定するものではなく任意の繊度でよい。
【0024】
次に、本発明の高輝度夜光性繊維の製造法の一例を説明する。
【0025】
本発明では、夜光性顔料を含有するポリエステル樹脂またはポリオレフィン樹脂が芯成分、夜光性顔料を含有しないポリエステル樹脂が鞘成分となるように複合紡糸するが、複合紡糸手段は特に限定はなく、一般に良く知られた複合紡糸装置を用いて溶融紡糸を行うことができる。
【0026】
また、夜光性顔料の芯成分樹脂への添加は、夜光性顔料を直接添加しても良いが、夜光性顔料を予めポリオレフィンまたはポリエステル樹脂に溶融分散させたマスターバッチの形態とし、該マスターバッチを芯成分樹脂へ添加すれば、芯成分用樹脂中における夜光性顔料の分散性をより向上させることができ好ましい。
【0027】
さらに、繊維を構成する芯成分中の夜光性顔料の濃度は10〜60重量%が好ましく、芯成分中の夜光性顔料の濃度が10%未満では、得られる夜光性繊維中の夜光性顔料の濃度を7重量%以上とすると、芯鞘比率が2/1を超えるため製糸安定性の悪化等の問題が発生しやすい。芯成分中の夜光性顔料の濃度が60%を超えると、ポリマーの流動性が悪化し製糸が困難となりやすい。
【0028】
溶融紡糸して得られた未延伸糸は、延伸倍率2〜4倍、延伸温度70〜100℃、熱セット温度100〜200℃の条件下で延伸をおこない、高輝度夜光性繊維を得ることができる。
【0029】
このとき延伸倍率が2倍未満であると得られる繊維の強度が低くなり、4倍を超えると製糸安定性が低下しやすい。延伸温度が70℃未満では、均一延伸が行われず、その結果、繊維軸方向に太細斑が発生しやすく、局所的に繊維強度が弱くなったり、染色した場合の欠点となりやすい。熱セット温度が100℃を超える場合も、均一延伸が行われず、同様の問題が発生しやすい。
【0030】
さらに、熱セット温度が100℃未満であると、熱収縮率が高くなり、繊維の寸法安定性が不十分なものとなりやすい。また、延伸温度が200℃を超えると製糸安定性が低下する。さらに好ましい延伸温度範囲は75〜90℃、熱セット温度は100〜180℃である。
【0031】
また、紡糸、延伸を連続したプロセスで行っても同様な高輝度夜光性繊維を得ることができる。
【0032】
さらに延伸糸は、引き続いて緩和率1〜10%、緩和温度100〜220℃の緩和熱処理を実施することにより、寸法安定性を向上することができる。緩和率が1%未満および緩和温度が100℃未満であると、繊維の熱収縮率を十分下げることができず、寸法安定性の向上効果が不十分となりやすい。緩和率が10%を越えると、緩和時にローラーへ糸をとられやすくなり、安定性が低下しやすい。緩和温度が220℃を越えると、熱により繊維が融解しやすくなり、糸切れが発生しやすくなる。
【0033】
なお本発明の高輝度夜光性繊維を用いた織編物は、織編機、織編組織等については特に制約することなく、少なくともその一部に用いることによって、染色後も十分な輝度を有し、耐光堅牢度に優れた織編物となる。
【0034】
【実施例】
以下、本発明を実施例によりさらに詳細に説明する。なお、実施例中の各特性値の評価は、下記の方法で行った。
【0035】
(未染色繊維の輝度測定試験)
▲1▼厚さ1mm程度の繊維のカード巻きサンプルを作成し、24時間サンプルへの光を遮断した。
【0036】
▲2▼サンプルを、27W卓上蛍光灯下60cm(約1000lux)に水平に置き、30分照射して励起させた。
【0037】
▲3▼照射停止後、残光輝度を残光輝度をMINOLTA LS−100輝度計を用いて測定した。
【0038】
(染色後の繊維の輝度測定試験)
▲1▼繊維の編み地サンプルを80℃のカチオン染色液で、染色温度80℃×50分、染料濃度0.01%、浴比1:15で、イエロー、ピンク、ブルーに染色したサンプルを作成した。
【0039】
▲2▼染色後のサンプルを1日間室温で乾燥した。
【0040】
▲3▼乾燥後のサンプルに対し、24時間光を遮断した。
【0041】
▲4▼サンプルを、27W卓上蛍光灯下60cm(約1000lux)に水平に置き、30分照射して励起させた。
【0042】
▲5▼照射停止後、残光輝度をMINOLTA LS−100輝度計を用いて測定した。
【0043】
なお、使用した染料は、次の通りである。
【0044】
イエロー: Dystar製 Astrazon yellow 7GLL
ピンク : 保土ヶ谷化学製 Cachilon Brilliant pink CD−BH
ブルー : Dystar製 Astrazon Blue BG
(繊維の強度よび伸度)
島津製作所製オートグラフSD−100C特形で、試料長20cm、引張速度20cm/minで測定した値である。
【0045】
(耐光堅牢度)
繊維の編地を、カチオン染料を用いて、染色温度80℃×50分、染料濃度0.01%、浴比1:15でイエロー、ピンク、ブルーに染色して得たサンプルを、JIS L0842(カーボンアーク灯光に対する染色堅ろう試験方法)にしたがって実施した。なお、使用した染料は、次の通りである。
【0046】
イエロー: Dystar製 Astrazon yellow 7GLL
ピンク : 保土ヶ谷化学製 Cachilon Brilliant pink CD−BH
ブルー : Dystar製 Astrazon Blue BG
(実施例1)
MFR値10g/10分、融点=165℃のポリプロピレン樹脂60重量%と、夜光性顔料として市販の夜光性顔料「ピカリコSAD−5A」(ケミテック(株)製)40重量%を溶融賦型し、マスターバッチ(以下MBと略記する)を製造した。このMBを芯成分に配し、鞘成分として5−ナトリウムスルホイソフタル酸成分として5−スルホイソフタル酸ジメチルエステル,ナトリウム塩(DMS)を0.5モル%、アジピン酸成分としてアジピン酸ジエチロールを5モル%共重合したポリエチレンテレフタレート樹脂を使用し、芯鞘比率(容積比)1/1.6で、285℃の温度で溶融し、丸断面芯鞘型0.30mm×24ホールの複合紡糸ノズルにより溶融紡糸し、引取速度1400m/分で巻き取った。
【0047】
さらに、この繊維を延伸温度80℃、延伸倍率2.5倍で延伸した後に、緩和率5%、160℃の温度で熱セットし、133dtex24フィラメントの夜光性繊維を得た。
【0048】
得られた夜光性繊維中の夜光性顔料の含有量は、14重量%/ヤーンであり、明るい場所から暗い場所に移すと、数時間高輝度の緑色(ピーク波長518〜520nm)を発光する機能を有していた。得られた繊維の評価結果を表1に示した。
【0049】
得られた夜光性繊維の耐光堅牢度試験を実施した結果、3〜5級と良好であった。さらに、染色後のサンプルの輝度測定試験を実施した結果、励起停止から1分後の残光輝度が390〜560mcd/mと良好な輝度特性を有していた。
【0050】
(実施例2)
鞘成分のポリエチレンテレフタレート樹脂の、5−Naスルホイソフタル酸成分の共重合量を1モル%にした以外は、実施例1と同様に実施して、133dtex24フィラメントの夜光性繊維を得た。得られた繊維の評価結果を表1に示した。
【0051】
得られた夜光性繊維の耐光堅牢度試験を実施した結果、3〜5級と良好であった。さらに、染色後のサンプルの輝度測定試験を実施した結果、励起停止から1分後の残光輝度が340〜490mcd/mと良好な輝度特性を有していた。
【0052】
(実施例3)
鞘成分のポリエチレンテレフタレート樹脂の、5−Naスルホイソフタル酸成分の共重合量を1.5モル%にした以外は、実施例1と同様に実施して、133dtex24フィラメントの夜光性繊維を得た。得られた繊維の評価結果を表1に示した。
【0053】
得られた夜光性繊維の耐光堅牢度試験を実施した結果、3〜5級と良好であった。さらに、染色後のサンプルの輝度測定試験を実施した結果、励起停止からの残光輝度が290〜440mcd/mと良好な輝度特性を有していた。
【0054】
(実施例4)
夜光性顔料として市販の夜光性顔料「N夜光GLL−300FF」(根本特殊化学(株)製)を使用した以外は実施例2と同様に実施して、133dtex24フィラメントの夜光性繊維を得た。
【0055】
得られた夜光性繊維中の夜光性顔料の含有量は、14重量%/ヤーンであり、明るい場所から暗い場所に移すと、数時間高輝度の緑色(ピーク波長520nm)を発光する機能を有していた。得られた繊維の評価結果を表1に示した。
【0056】
得られた夜光性繊維の耐光堅牢度試験を実施した結果、3〜5級と良好であった。さらに、染色後のサンプルの輝度測定試験を実施した結果、励起停止から1分後の残光輝度が370〜500mcd/mと良好な輝度特性を有していた。
【0057】
(比較例1)
鞘成分を構成するポリエステル樹脂として、5−ナトリウムスルホイソフタル酸成分、アジピン酸成分を共重合しない以外は、実施例1と同様に実施して、133dtex24フィラメントの夜光性繊維を得た。得られた繊維の評価結果を表1に示した。
【0058】
なお、得られた繊維はカチオン可染性がなく、カチオン染料で染色しても十分な染色性を示さないため、染色後の繊維の輝度測定には、分散染料を用い110℃で染色を行ったが、夜光性顔料が熱水により加水分解され、染色後の励起停止からの残光輝度が30〜60mcd/mと輝度特性が不十分であった。
【0059】
(比較例2)
鞘成分のポリエチレンテレフタレート樹脂の5−Naスルホイソフタル酸成分の共重合量を3モル%にした以外は、実施例1と同様に実施して、133dtex24フィラメントの夜光性繊維を得た。得られた繊維の評価結果を表1に示した。
【0060】
繊維の強度および伸度が、ともに著しく低く、輝度測定のサンプリングができないレベルであった。
【0061】
(比較例3)
鞘成分のポリエチレンテレフタレート樹脂のアジピン酸成分の共重合量を30モル%にした以外は、実施例1と同様に実施して、133dtex24フィラメントの夜光性繊維を得ようと試みたが、紡糸後に巻き取った未延伸糸が融着してしまい、解舒できず、延伸糸とすることができなかった。
【0062】
(比較例4)
紡糸時の芯鞘比率(容積比)を1/6にした以外は実施例2と同様に実施して、133dtex24フィラメントの夜光製繊維を得た。得られた繊維中の夜光性顔料の含有量は、5重量%/ヤーンであり延伸糸の強伸度特性は良好であったが、表1に示したとおり輝度特性が不充分であった。
【0063】
【表1】

Figure 2004052203
【0064】
【発明の効果】
本発明の高輝度夜光性繊維は、芯鞘構造の鞘成分を、ジカルボン酸成分として5−ナトリウムスルホイソフタル酸成分とアジピン酸成分を共重合するポリエステル樹脂とすることにより、カチオン染料により100℃以下の低温で染色が可能となり、染色後に高い発光輝度を有し、かつ染色後の耐光堅牢度が良好となる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention has a high luminous brightness after dyeing, and a high brightness luminous fiber suitable for various uses such as knitted fabrics for clothing that has good light fastness after dyeing, and at least a part of the luminous fiber. The woven or knitted fabric used in the above.
[0002]
[Prior art]
Conventionally, various materials have been colored in order to impart various color effects to various fibers. Particularly in recent years, attempts have been made to impart a high added value to fibers by using various functional coloring materials as coloring materials, and containing luminescent coloring materials called luminous pigments or luminous pigments. Fiber is one of them.
[0003]
As such a luminous fiber, Patent Document 1 proposes a polyester fiber using zinc sulfide as a luminous agent. Patent Document 2 describes a fiber using an aluminate of an alkaline earth metal activated with europium or the like as a phosphorescent phosphor material, and describes using polyester as a fiber-forming resin. . However, in these methods, when dyeing is performed under ordinary dyeing conditions for polyester fibers, there is a problem that the luminous phosphor material is hydrolyzed by high-temperature hot water during the dyeing process, and the luminance characteristics are reduced.
[0004]
[Patent Document 1] JP-A-2-112414
[Patent Document 2] Japanese Patent Application Laid-Open No. 8-127937
[Problems to be solved by the invention]
The present invention has been made to solve the drawbacks of the prior art, and provides a high-brightness luminescent fiber and a high-brightness luminescent knitted fabric having sufficient luminance even after dyeing and having excellent light fastness. is there.
[0007]
[Means for Solving the Problems]
A first gist of the present invention is a core-sheath type conjugate fiber composed of a core component made of a polyester resin or a polyolefin resin containing a luminous pigment and a sheath component made of a polyester resin containing no luminous pigment. As a dicarboxylic acid component, the polyester resin constituting the sheath component copolymerizes 5-sodium sulfoisophthalic acid component in an amount of 0.3 to 2.5 mol% and adipic acid component in an amount of 3 to 15 mol%. 0.5 to 96.7% by mole of ethylene terephthalate.
[0008]
A second gist of the present invention resides in a woven or knitted fabric using at least a part of the high-brightness luminescent fiber of the present invention.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, it is necessary that the luminous pigment is added to the core component, the sheath component is made of a resin containing no luminous pigment, and the luminous pigment is prevented from falling off in the thread-forming step, the processing step and the like.
[0010]
The core-sheath ratio is preferably in the range of 1/5 to 2/1 in terms of volume ratio from the viewpoints of spinning properties and fiber properties. When the core-sheath ratio is less than 1/5, the content of the luminescent pigment in the fiber becomes small, and the brightness of the fiber tends to be insufficient. On the other hand, when the core-sheath ratio is more than 2/1, the spinning properties and the post-processability of knitting, weaving and the like tend to deteriorate.
[0011]
Further, the resin of the core component needs to be a polyester resin or a polyolefin resin in view of the ease of melt spinning of the core-sheath fiber. In a process using hot water such as a dyeing process, a polyolefin resin is preferable in order to make it difficult for hot water to penetrate, and a polypropylene resin having a melting point of 80 to 180 ° C. and an MFR of 1 to 40 g / 10 minutes is more preferable. When the melting point is less than 80 ° C., in the dyeing process, the core component is easily melted at the temperature of hot water, water easily penetrates into the core component, and the luminous performance tends to decrease. Further, when the MFR is out of the range of 1 to 40 g / 10 minutes, the spinning stability at the time of composite spinning with polyester tends to decrease.
[0012]
In addition, when dyeing with a disperse dye, which is a method for dyeing a normal polyester fiber, dyeing at a high temperature of 110 ° C. or higher is essential to maintain light fastness after dyeing. In the case of the added fiber, the luminescent pigment is hydrolyzed by high-temperature hot water, and the luminance characteristics are greatly reduced.
[0013]
In the present invention, by using a polyester resin in which a sheath component is a dicarboxylic acid component and a 5-sodium sulfoisophthalic acid component and an adipic acid component are copolymerized, dyeing with a cationic dye at a low temperature of 100 ° C. or less becomes possible. By being able to dye at a lower temperature than disperse dyes, it is possible to prevent the decomposition of the luminescent pigment and obtain sufficient luminance characteristics even after dyeing. Further, by dyeing with a cationic dye, it becomes excellent in sharpness.
[0014]
The copolymerization amount of the 5-Na sulfoisophthalic acid component is required to be 0.3 to 2.5 mol%, and if it is less than 0.3 mol%, the cationic dyeing property is reduced and exceeds 2.5 mol%. In this case, the fiber strength is reduced, and the yarn production stability and the processability are poor.
[0015]
Further, the copolymerization amount of the adipic acid component needs to be 3 to 15 mol%. If the amount is less than 3 mol%, the cationic dyeing properties decrease, and if it exceeds 15 mol%, the glass transition temperature of the polymer decreases, and the single fibers are fused together at the stage of the undrawn yarn.
[0016]
In the present invention, the adipic acid component to be copolymerized can be added at any stage of synthesizing the polyester polymer, and a method of adding adipic acid powder at the start of the esterification reaction between terephthalic acid and ethylene glycol, and Adipic acid or bis (2-hydroxy) adipate is added as a dispersion or solution to bishydroxyethyl terephthalate obtained by an esterification reaction between terephthalic acid and ethylene glycol or a transesterification reaction between dimethyl terephthalate and ethylene glycol. The method is general. Also, the 5-sodium sulfoisophthalic acid component can be added at an arbitrary stage of synthesizing the polymer similarly to adipic acid, and powder of 5-sodium sulfoisophthalic acid is added at the start of the esterification reaction between terephthalic acid and ethylene glycol. A method of adding the dimethyl terephthalate and a method of adding it as a dimethyl ester thereof at the start of a transesterification reaction of ethylene glycol are generally used.
[0017]
Examples of the luminous pigment used in the present invention include a phosphorescent pigment obtained by activating various metals mainly with a sulfide compound, a phosphorescent phosphor material activated by a rare earth element in an alkaline earth metal aluminate, and the like. From the viewpoint of chemical stability and luminance characteristics, a phosphorescent phosphor material obtained by activating an alkaline earth metal aluminate with a rare earth element is preferable.
[0018]
Furthermore, in the present invention, it is preferable that the light fastness after dyeing is 3 or higher, and the afterglow luminance 1 minute after stopping the excitation after dyeing is 100 mcd / m 2 or more. If the light fastness after dyeing is less than Class 3, discoloration is likely to occur during use of the product.
[0019]
Regarding the luminance characteristics after dyeing, if the afterglow luminance after one minute from the stop of excitation is less than 100 mcd / m 2 , the luminance characteristics after dyeing are likely to be insufficient. In order to make the afterglow luminance one minute after the stop of the excitation after dyeing 100 mcd / m 2 or more, it is preferable to make the afterglow luminance one minute after the stop of the excitation before dyeing 500 mcd / m 2 or more. .
[0020]
Furthermore, in the present invention, the addition amount of the luminous pigment is preferably 7 to 25% by weight based on all fibers, and if it is less than 7% by weight, the afterglow luminance after one minute from the stop of the excitation at a stage before dyeing is 500 mcd /. m 2, and the afterglow luminance 1 minute after stopping the excitation after the dyeing is likely to be less than 100 mcd / m 2 due to the decrease in light transmittance due to the dyeing. On the other hand, if the amount exceeds 25% by weight, yarn breakage tends to occur frequently during yarn production, and fiberization tends to be difficult.
[0021]
The luminous pigment used in the present invention has a higher brightness as the particle size becomes larger, but the particle size is in the range of 1 to 15 μm from the viewpoint of fiber-forming properties, such as a decrease in the strength of the obtained luminous fiber. Is preferred. When the particle size of the luminous pigment is less than 1 μm, the luminous performance tends to be insufficient, and when the particle size exceeds 15 μm, the spinning property is apt to decrease, and the strength of the obtained luminous fiber decreases, Post-processability is likely to decrease.
[0022]
Further, the single fiber fineness of the high-brightness luminescent fiber of the present invention is preferably 40 μm or less. When the thickness of the single fiber exceeds 40 μm, the soft texture tends to be insufficient, and its use for embroidery thread or clothing is likely to be restricted.
[0023]
The cross-sectional shape of the high-luminance luminescent fiber of the present invention may be a circular or triangular shaped or hollow cross-section as long as it has a core-sheath structure, and the total fineness is not particularly limited and may be any fineness.
[0024]
Next, an example of the method for producing the high-brightness luminous fiber of the present invention will be described.
[0025]
In the present invention, a polyester resin or a polyolefin resin containing a luminous pigment is subjected to composite spinning such that a polyester component not containing a luminous pigment becomes a sheath component, but the composite spinning means is not particularly limited and is generally good. Melt spinning can be performed using a known composite spinning device.
[0026]
The addition of the luminous pigment to the core component resin may be performed by directly adding the luminous pigment, but the luminous pigment is preliminarily melt-dispersed in a polyolefin or polyester resin in the form of a master batch. Addition to the core component resin is preferable because the dispersibility of the luminous pigment in the core component resin can be further improved.
[0027]
Further, the concentration of the luminous pigment in the core component constituting the fiber is preferably 10 to 60% by weight, and when the concentration of the luminous pigment in the core component is less than 10%, the concentration of the luminous pigment in the obtained luminous fiber is reduced. If the concentration is 7% by weight or more, the core-sheath ratio is more than 2/1, and thus problems such as deterioration of yarn production stability are likely to occur. When the concentration of the luminous pigment in the core component exceeds 60%, the flowability of the polymer is deteriorated, and it is easy to make the spinning difficult.
[0028]
The unstretched yarn obtained by melt spinning can be stretched at a stretching ratio of 2 to 4 times, a stretching temperature of 70 to 100 ° C, and a heat setting temperature of 100 to 200 ° C to obtain a high-luminance luminescent fiber. it can.
[0029]
At this time, if the draw ratio is less than 2 times, the strength of the obtained fiber is low, and if it exceeds 4 times, the yarn production stability tends to be low. When the stretching temperature is lower than 70 ° C., uniform stretching is not performed, and as a result, large and thin spots are apt to be generated in the fiber axis direction, and the fiber strength is locally weakened, or a defect when dyeing is apt to occur. When the heat setting temperature exceeds 100 ° C., uniform stretching is not performed, and the same problem is likely to occur.
[0030]
Further, when the heat setting temperature is lower than 100 ° C., the heat shrinkage rate increases, and the dimensional stability of the fiber tends to be insufficient. On the other hand, when the stretching temperature is higher than 200 ° C., the yarn production stability decreases. A more preferred stretching temperature range is 75 to 90 ° C, and a heat setting temperature is 100 to 180 ° C.
[0031]
Even if spinning and drawing are performed in a continuous process, similar high-luminance luminescent fibers can be obtained.
[0032]
Further, the drawn yarn can be improved in dimensional stability by subsequently performing relaxation heat treatment at a relaxation rate of 1 to 10% and a relaxation temperature of 100 to 220 ° C. If the relaxation rate is less than 1% and the relaxation temperature is less than 100 ° C., the heat shrinkage of the fiber cannot be sufficiently reduced, and the effect of improving the dimensional stability tends to be insufficient. When the relaxation rate exceeds 10%, the yarn is easily taken on the roller at the time of relaxation, and the stability tends to decrease. If the relaxation temperature exceeds 220 ° C., the fibers are likely to be melted by heat, and yarn breakage is likely to occur.
[0033]
The woven or knitted fabric using the high-luminance luminous fiber of the present invention has a sufficient luminance even after dyeing by using at least a part of the weaving machine or the woven or knitted fabric without any particular limitation. And a woven or knitted fabric having excellent light fastness.
[0034]
【Example】
Hereinafter, the present invention will be described in more detail with reference to Examples. The evaluation of each characteristic value in the examples was performed by the following method.
[0035]
(Brightness measurement test of undyed fiber)
{Circle around (1)} A card wound sample of a fiber having a thickness of about 1 mm was prepared, and light to the sample was blocked for 24 hours.
[0036]
{Circle over (2)} The sample was placed horizontally at 60 cm (about 1000 lux) under a 27W tabletop fluorescent lamp, and irradiated for 30 minutes to excite.
[0037]
{Circle around (3)} After the irradiation was stopped, the afterglow luminance was measured using a MINOLTA LS-100 luminance meter.
[0038]
(Test for measuring brightness of dyed fiber)
{Circle around (1)} Fabricating a knitted fabric sample in yellow, pink, and blue using a cationic dyeing solution at 80 ° C with a dyeing temperature of 80 ° C for 50 minutes, a dye concentration of 0.01%, and a bath ratio of 1:15. did.
[0039]
(2) The sample after staining was dried at room temperature for one day.
[0040]
{Circle over (3)} The light was blocked from the dried sample for 24 hours.
[0041]
{Circle around (4)} The sample was placed horizontally at 60 cm (about 1000 lux) under a 27W tabletop fluorescent lamp, and irradiated for 30 minutes to excite.
[0042]
(5) After the irradiation was stopped, the afterglow luminance was measured using a MINOLTA LS-100 luminance meter.
[0043]
The dyes used are as follows.
[0044]
Yellow: Dystar Astrazon yellow 7GLL
Pink: Hochigaya Chemical's Cachilon Brilliant pink CD-BH
Blue: Dystar Astrazon Blue BG
(Fiber strength and elongation)
This is a value measured at a sample length of 20 cm and a pulling speed of 20 cm / min with a special form of Autograph SD-100C manufactured by Shimadzu Corporation.
[0045]
(Light fastness)
A sample obtained by dyeing a fiber knitted fabric with a cationic dye at a dyeing temperature of 80 ° C. for 50 minutes at a dye concentration of 0.01% and a bath ratio of 1:15 to yellow, pink, and blue was obtained according to JIS L0842 ( (Dyeing fastness test method for carbon arc light). The dyes used are as follows.
[0046]
Yellow: Dystar Astrazon yellow 7GLL
Pink: Hochigaya Chemical's Cachilon Brilliant pink CD-BH
Blue: Dystar Astrazon Blue BG
(Example 1)
Melting and shaping 60% by weight of a polypropylene resin having an MFR value of 10 g / 10 min and a melting point of 165 ° C., and 40% by weight of a commercially available luminous pigment “Picalyco SAD-5A” (manufactured by Chemitech Co., Ltd.) as a luminous pigment, A masterbatch (hereinafter abbreviated as MB) was produced. This MB was placed in a core component, and 0.5 mol% of 5-sodium sulfoisophthalic acid dimethyl ester, sodium salt (DMS) was used as a sheath component and 5-mol of diethylethyl adipate was used as an adipic acid component. % Of polyethylene terephthalate resin, melted at a temperature of 285 ° C at a core-sheath ratio (volume ratio) of 1 / 1.6, and melted by a composite spinning nozzle with a round cross-section of 0.30 mm x 24 holes. It was spun and wound up at a take-up speed of 1400 m / min.
[0047]
Further, after stretching this fiber at a stretching temperature of 80 ° C. and a stretching ratio of 2.5, it was heat-set at a relaxation rate of 5% and a temperature of 160 ° C. to obtain a luminous fiber of 133 dtex24 filament.
[0048]
The content of the luminous pigment in the obtained luminous fiber is 14% by weight / yarn. When the luminous pigment is moved from a bright place to a dark place, it emits high-luminance green (peak wavelength 518 to 520 nm) for several hours. Had. Table 1 shows the evaluation results of the obtained fibers.
[0049]
As a result of performing a light fastness test of the obtained luminous fiber, it was as good as grades 3 to 5. Furthermore, as a result of performing a luminance measurement test on the sample after dyeing, the afterglow luminance after one minute from the stop of the excitation was 390 to 560 mcd / m 2 , indicating good luminance characteristics.
[0050]
(Example 2)
The procedure of Example 1 was repeated, except that the copolymerization amount of the 5-Na sulfoisophthalic acid component of the polyethylene terephthalate resin as the sheath component was changed to 1 mol%, to obtain a luminous fiber having 133 dtex24 filaments. Table 1 shows the evaluation results of the obtained fibers.
[0051]
As a result of performing a light fastness test of the obtained luminous fiber, it was as good as grades 3 to 5. Furthermore, as a result of performing a luminance measurement test on the sample after dyeing, the afterglow luminance after one minute from the stop of the excitation was 340 to 490 mcd / m 2 , indicating good luminance characteristics.
[0052]
(Example 3)
Except that the copolymerization amount of the 5-Na sulfoisophthalic acid component of the polyethylene terephthalate resin of the sheath component was changed to 1.5 mol%, a luminous fiber having 133 dtex24 filaments was obtained in the same manner as in Example 1. Table 1 shows the evaluation results of the obtained fibers.
[0053]
As a result of performing a light fastness test of the obtained luminous fiber, it was as good as grades 3 to 5. Furthermore, as a result of performing a luminance measurement test on the sample after the dyeing, it was found that the afterglow luminance from the stop of the excitation was 290 to 440 mcd / m 2, which was a good luminance characteristic.
[0054]
(Example 4)
Except for using a commercially available luminous pigment “N luminous GLL-300FF” (manufactured by Nemoto Special Chemical Co., Ltd.) as the luminous pigment, the same procedure as in Example 2 was carried out to obtain 133 dtex24 filament luminous fiber.
[0055]
The content of the luminescent pigment in the obtained luminescent fiber is 14% by weight / yarn, and has a function of emitting high-brightness green (peak wavelength 520 nm) for several hours when it is moved from a bright place to a dark place. Was. Table 1 shows the evaluation results of the obtained fibers.
[0056]
As a result of performing a light fastness test of the obtained luminous fiber, it was as good as grades 3 to 5. Furthermore, as a result of performing a luminance measurement test on the sample after dyeing, the afterglow luminance one minute after the excitation was stopped was 370 to 500 mcd / m 2 , indicating good luminance characteristics.
[0057]
(Comparative Example 1)
Except not copolymerizing a 5-sodium sulfoisophthalic acid component and an adipic acid component as the polyester resin constituting the sheath component, the same procedure as in Example 1 was carried out to obtain a 133dtex24 filament luminous fiber. Table 1 shows the evaluation results of the obtained fibers.
[0058]
In addition, since the obtained fiber does not have cationic dyeability and does not show sufficient dyeability even when dyed with a cationic dye, the dye is dyed at 110 ° C. using a disperse dye to measure the luminance of the fiber after dyeing. was but luminous pigment is hydrolyzed by hot water, the afterglow luminance of the excitation stopped after dyeing 30~60mcd / m 2 and luminance characteristics was insufficient.
[0059]
(Comparative Example 2)
The same procedure as in Example 1 was carried out except that the copolymerization amount of the 5-Na sulfoisophthalic acid component of the polyethylene terephthalate resin of the sheath component was changed to 3 mol%, to obtain a luminous fiber having 133 dtex24 filaments. Table 1 shows the evaluation results of the obtained fibers.
[0060]
The strength and elongation of the fiber were both extremely low, and were at a level where luminance measurement could not be sampled.
[0061]
(Comparative Example 3)
An attempt was made to obtain 133 dtex24 filament luminous fiber by carrying out in the same manner as in Example 1 except that the copolymerization amount of the adipic acid component of the polyethylene terephthalate resin of the sheath component was changed to 30 mol%. The undrawn yarn thus taken was fused, could not be unwound, and could not be made into a drawn yarn.
[0062]
(Comparative Example 4)
Except that the core-sheath ratio (volume ratio) at the time of spinning was reduced to 1/6, the same procedure as in Example 2 was carried out to obtain 133 dtex24 filament luminous fiber. The content of the luminescent pigment in the obtained fiber was 5% by weight / yarn, and the drawn yarn had good strength and elongation characteristics, but as shown in Table 1, the brightness characteristics were insufficient.
[0063]
[Table 1]
Figure 2004052203
[0064]
【The invention's effect】
The high-brightness luminescent fiber of the present invention is characterized in that the sheath component of the core-sheath structure is a polyester resin copolymerizing a 5-sodium sulfoisophthalic acid component and an adipic acid component as a dicarboxylic acid component. Can be dyed at a low temperature, has high emission luminance after dyeing, and has good light fastness after dyeing.

Claims (5)

夜光性顔料を含有するポリエステル樹脂またはポリオレフィン樹脂からなる芯成分と、夜光性顔料を含有しないポリエステル樹脂からなる鞘成分とで構成された芯鞘型複合繊維であって、鞘成分を構成するポリエステル樹脂がジカルボン酸成分として、5−ナトリウムスルホイソフタル酸成分を0.3〜2.5モル%、アジピン酸成分を3〜15モル%共重合し、繰り返し単位の82.5〜96.7モル%がエチレンテレフタレートであることを特徴とする高輝度夜光性繊維。A core-sheath composite fiber composed of a core component composed of a polyester resin or a polyolefin resin containing a luminous pigment, and a sheath component composed of a polyester resin containing no luminous pigment, wherein the polyester resin constituting the sheath component Are copolymerized as a dicarboxylic acid component with a 5-sodium sulfoisophthalic acid component in an amount of 0.3 to 2.5 mol% and an adipic acid component in an amount of 3 to 15 mol%, and 82.5 to 96.7 mol% of a repeating unit is obtained. A high-brightness luminescent fiber characterized by being ethylene terephthalate. 染色後の耐光堅牢度が3級以上であって、染色後の励起停止から1分後の残光輝度が100mcd/m以上である請求項1記載の高輝度夜光性繊維。A is light-fastness after dyeing tertiary or more, high intensity luminous fibers afterglow luminance after 1 minute from the excitation stopped after dyeing claim 1, wherein at 100mcd / m 2 or more. 単繊維の太さが40μm以下である請求項1または2記載の高輝度夜光性繊維。3. The high-brightness luminescent fiber according to claim 1, wherein the single fiber has a thickness of 40 μm or less. 芯成分のポリオレフィン樹脂が、融点80〜180℃、MFR1〜40g/10分のポリプロピレン樹脂である請求項1〜請求項3のいずれかに記載の高輝度夜光性繊維。The high-luminance luminescent fiber according to any one of claims 1 to 3, wherein the polyolefin resin as the core component is a polypropylene resin having a melting point of 80 to 180 ° C and an MFR of 1 to 40 g / 10 minutes. 請求項1〜請求項4のいずれかに記載の高輝度夜光性繊維を少なくとも一部に用いた織編物。A woven or knitted fabric using the high-brightness luminous fiber according to any one of claims 1 to 4 at least in part.
JP2003013793A 2002-05-30 2003-01-22 High brightness luminous fiber and high brightness luminous fabric Expired - Fee Related JP4283000B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007092227A (en) * 2005-09-28 2007-04-12 Toray Ind Inc Polyester core-sheath conjugate fiber and its fabric
JP2007131980A (en) * 2005-11-11 2007-05-31 Toray Ind Inc Polyester sheath-core conjugated fiber and fiber fabric thereof
KR101766312B1 (en) 2009-06-03 2017-08-08 세키스이가가쿠 고교가부시키가이샤 Laminated glass panel for a heads-up display system
CN110791856A (en) * 2019-10-31 2020-02-14 江苏金荣泰新材料科技有限公司 Luminous fabric and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007092227A (en) * 2005-09-28 2007-04-12 Toray Ind Inc Polyester core-sheath conjugate fiber and its fabric
JP2007131980A (en) * 2005-11-11 2007-05-31 Toray Ind Inc Polyester sheath-core conjugated fiber and fiber fabric thereof
KR101766312B1 (en) 2009-06-03 2017-08-08 세키스이가가쿠 고교가부시키가이샤 Laminated glass panel for a heads-up display system
CN110791856A (en) * 2019-10-31 2020-02-14 江苏金荣泰新材料科技有限公司 Luminous fabric and preparation method thereof
CN110791856B (en) * 2019-10-31 2022-05-03 江苏金荣泰新材料科技有限公司 Luminous fabric and preparation method thereof

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