JP3698769B2 - Textile dyeing method - Google Patents

Textile dyeing method Download PDF

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JP3698769B2
JP3698769B2 JP24940295A JP24940295A JP3698769B2 JP 3698769 B2 JP3698769 B2 JP 3698769B2 JP 24940295 A JP24940295 A JP 24940295A JP 24940295 A JP24940295 A JP 24940295A JP 3698769 B2 JP3698769 B2 JP 3698769B2
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Prior art keywords
tyrosinase
enzyme
melanin
tyrosine
dyeing
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JP24940295A
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JPH0987977A (en
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正孝 舩山
進 勝圓
良平 山本
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Kurashiki Spinning Co Ltd
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Kurashiki Spinning Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は酵素を用いる繊維染色法、特にチロシナーゼを用いる繊維染色法に関する。
【0002】
【従来の技術】
従来、繊維の染色に使用されている染料は酸性染料、塩基性染料、直接染料、建染染料、分散染料、反応性染料および蛍光染料等に大別される。繊維業界で広く使用されているこれらの染料のほとんどは化学合成品であるため、環境汚染やその廃液処理に多大の設備と経費を必要とするだけでなく、極端なpH、高温、高圧力の条件等の危険な作業環境のもとで染色しなければならず、繊維に損傷を与えるという問題がある。
【0003】
この問題の解決策の一つとして、特開平6−316874号公報ではペルオキシダーゼ、ポリフェノールオキシダーゼ、ビリルビンオキシダーゼ、ラッカーゼ、アスコルビン酸オキシダーゼ、カタラーゼ等の酵素が含有する水性媒体、好ましくは該媒体に該酵素の基質が添加されたもの、に被処理綿を浸漬し、適切な処理を施して染色する綿染色法が開示されている。しかしながら、該公報によると酵素としてチロシナーゼは言及されておらず、また、被処理綿としては有色綿しか適用されていない。
【0004】
また、近年では特定の酵素とその基質を一定の条件下で混合しメラニン色素を生成させ、該メラニン色素を利用して染色しようとする試みがなされており、該メラニン色素の合成方法や染色用組成物が、エール・ジャーナル・オブ・バイオロジー・アンド・メディスン(46巻、500−507頁、1973年)、特開平3−77813号公報および特公平6−69945号公報で開示されている。
【0005】
エール・ジャーナル・オブ・バイオロジー・アンド・メディスン(46巻、500−507頁、1973年)では、酵素としてマッシュルームのチロシナーゼやマウスのメラノーマ(黒色腫)からの無細胞抽出液、基質としてL−ドーパを用いメラニン色素を酵素的に合成する方法が掲載されている。この方法で調製したメラニンの性質は同誌に報告されているが、メラニンの繊維への応用例および応用方法に関しては一切言及されていない。
【0006】
特開平3−77813号公報では、酵素としてチロシナーゼまたはラッカーゼ、基質としてチロシン等を含むモノフェノールまたはドーパ等を含むジフェノールを使用した毛髪染色用組成物が開示されているが、メラニン色素を一旦生成させた後でなければ染色工程に入ることはできないため、一連の工程は煩雑となってしまうという問題がある。また、メラニン色素が生成するまで6日間を要するという時間的な問題を生じている。
【0007】
特公平6−69945号公報では、ベータ−チロシナーゼ(チロシンフェノールリアーゼ)等の酵素、L−もしくはDL−セリンとピロカテコールまたはピルビン酸ナトリウムとピロカテコールと酢酸アンモニウムからなるメラニン前駆物質および芳香族アミンからなる毛髪染色用組成物が提供されている。この方法はメラニン生成過程中に取り込まれたアミンと毛髪タンパクのカルボキシル基とを結合させることにより、耐光堅牢度を向上させる点に特徴がある。しかしながら、チロシナーゼ(カテコールオキシダーゼ、モノフェノールモノオキゲナーゼ)によりチロシンまたはドーパ等のメラニン前駆体からメラニンを生成して染色させるための組成物に関しては一切言及されていない。
【0008】
【発明が解決しようとする課題】
本発明は環境を汚染することなく、pH、温度および圧力等が穏和な条件で安全な作業環境にて繊維に物理的および化学的に損傷を与えずに、繊維を効率よく簡便に染色する新規な方法を提供することを目的とする。
【0009】
本発明はさらに、染色後において耐光堅牢度の高い繊維を提供する繊維染色法を提供することを目的とする。
【0010】
【課題を解決するための手段および発明の実施の形態】
本発明はチロシナーゼおよびメラニン色素前駆体を含有する水溶液により繊維を処理することを特徴とする繊維染色法に関する。
【0011】
本発明の染色法により処理できる繊維としては、絹、麻、セルロース系再生繊維(レーヨン、キュプラなど)、セルロース系半合成繊維(アセテートなど)、精製セルロース系繊維(テンセル:コートル社(オーストリア国)商標)、羊毛および絹等からなる繊維、ならびにこれらと合成繊維との混紡品等を例示することができる。本発明においては未加工の繊維でも、糸、織物、編み物、不織布等の加工品でも染色することができる。特に、本発明では絹、レーヨン、キュプラ、テンセル等のセルロースを主成分とする繊維またはそれらの混紡品に好適に使用される。
【0012】
精練されていない繊維の加工品を処理する場合は、精練剤で前処理するか、または精練剤を酵素液中に添加して処理することが好ましい。精練剤としては、カチオン系、アニオン系、ノニオン系界面活性剤等の通常の精練処理に用いられるものやペクチナーゼ、セルラーゼ、マセレーティング酵素、リパーゼ、プロテアーゼ等の酵素精練剤がいずれも好適に用いられる。
【0013】
本発明に用いられるチロシナーゼは別にカテコールオキシダーゼ、モノフェノールモノオキシゲナーゼまたはフェノラーゼとも呼ばれている。チロシナーゼ酵素はメラニン色素前駆体であるチロシン、ドーパ、ドーパキノン、およびロイコドーパクロム等に作用しメラニン系色素を生成させる酵素である。マッシュルームや動物の皮膚細胞の抽出液、またはアスパージーラス属、ノイロスポーラ属、ストレプトマイセス属等の菌培養液より抽出されたチロシナーゼが好ましい。また、かかる酵素を1種類または2種類以上混合して用いてもよい。
【0014】
本発明の染色法に使用するチロシナーゼの水溶液中での濃度は0.1〜10,000ユニット/mlとするのが好ましい、0.1ユニット/ml未満では効率よく染色することができず、10,000ユニット/mlを越えると染色の制御(色彩の濃淡、明暗等)が困難となるため好ましくない。ここで、1ユニットとはL−チロシンを基質として1分間に280nmの吸光度を0.001増加させる酵素量として定義される量である。例えば、市販マッシュルーム由来チロシナーゼの1ユニットは0.3μgである。
【0015】
メラニン色素前駆体としてはチロシン、ドーパ、ドーパキノンおよびロイコドーパクロム等のメラニン色素前駆体が使用され、これらメラニン色素前駆体の水溶液中での濃度は0.0001〜0.5重量%とするのが好ましい。0.0001重量%未満では効率よく染色できず、0.5重量%を越えること原料コストが嵩み経済的に不利である。
【0016】
また、水溶液のpHは3〜10に調整する。pH調整のため、水溶液としてリン酸緩衝液や酢酸緩衝液等の緩衝液を用いるとよい。
【0017】
本発明の染色法においては、かかる酵素およびメラニン色素前駆体を含む水溶液へ未加工または既加工の繊維を浸漬処理する。または、該繊維を酵素水溶液に浸漬させた後、メラニン色素前駆体水溶液に浸漬処理してもよく、逆の順序、即ち、メラニン色素前駆体水溶液に浸漬させた後、酵素水溶液に浸漬処理してもよい。好ましくは、酵素およびメラニン色素前駆体を含む水溶液へ浸漬処理することである。
【0018】
処理時間は酵素の力価や使用量およびメラニン色素前駆体の濃度により適宜調節すればよい。例えば、酵素の力価が高く、使用量の多い場合には短時間とし、力価が低く使用量の少ない場合には長時間とするが、通常は0.5〜24時間で十分な染色効果が得られ、好ましくは1〜4時間である。
【0019】
浸漬処理は10〜80℃の温度で行うことができ、特に20〜50℃が好ましい。この間、必要に応じて処理液の撹拌、振盪を行う。
【0020】
この後、好ましくは空気を吹き込むことにより、被処理繊維を空気とよく接触させる。これは、メラニン色素前駆体を完全にメラニン色素へ酸化させ、染めむらをなくしたり、繊維への色素の沈着を良くしたりするためである。
【0021】
このように、比較的短時間の温和な染色処理で十分な染色がなされる。また、温和な処理のため繊維に物理的および化学的な損傷を与えることもない。
【0022】
かかる穏和な条件下で安全な作業環境下にて浸漬処理を行った後は十分に水洗し、風乾させると、処理条件に応じて淡小麦色から黒褐色の天然色に染色された繊維が得られる。本発明により染色された繊維は手触りが柔らかく、風合いもよい。被処理繊維にはメラニン色素の紫外線遮断能も付与されている。また、廃液処理は合成染料を用いる染色法の場合に比べて、極めて簡単であり、作業衛生上の問題もほとんどない。
【0023】
【実施例】
本発明を以下の実施例によりさらに説明する。
【0024】
実施例1〜6および比較例1〜5
綿100%のトレーナー用生地(裏毛付き厚地ニット、3cm×3cm、0.3g:品番A52736:倉敷紡績(株)社製)をペクチナーゼPL(天野製薬(株)製)で酵素精練した後、マッシュルーム由来のチロシナーゼ(製品番号T−7755:シグマ・ケミカル・カンパニー社製)およびL−チロシンを表1に示す濃度(重量%)になるように溶解した20mMリン酸カリウム緩衝液(pH7.0)9mlへ浸漬し(浴比1:30)、100rpmで往復振盪させながら30℃で20時間処理した。
【0025】
また、比較例として、緩衝液にチロシナーゼおよび/またはL−チロシンを添加しなかった以外、上記実施例と同様にして、浸漬処理を行った。なお、比較例1では浸漬処理は行わなかった。
【0026】
処理後、これら綿織物を十分に水洗し、風乾させたのち、目視により色を判定し、さらに色彩色差計(CR−200型:ミノルタカメラ(株)社製)により上記綿織物のL値、a値およびb値を判定した。結果を表1に示す。
【0027】
【表1】

Figure 0003698769
【0028】
表1から明らかなように、L個、a個およびb値について、実施例1〜6を比較例1と比較するとL−チロシンおよびチロシナーゼの添加量により様々な変化を示しているが、この測定結果は目視結果と一致する。比較例2〜5より綿織物ではL−チロシンまたはチロシナーゼのいずれかが欠けても染色効果は達成できないことが証明された。また、L−チロシン濃度およびチロシナーゼ濃度を高くすると色彩の明度は低下した。目視でも小麦色から黒褐色まできれいに染色できたことを確認した。なお、色彩および色調とL値、a値およびb値との関係は図1に示す通りである。
【0029】
実施例7〜12および比較例6〜10
酵素精練した綿織物の代わりに洗絨処理後の平織りの毛織物(品番G3525:倉敷紡績(株)社製)を用いた以外、実施例1〜6と同様にして、浸漬処理した。
【0030】
また、比較例として、緩衝液にチロシナーゼおよび/またはL−チロシンを添加しなかった以外、実施例7〜12と同様にして、浸漬処理を行った。なお、比較例6では浸漬処理は行わなかった。
【0031】
処理後、これら毛織物を十分に水洗し、風乾させたのち、実施例1〜6と同様にして、目視により色彩を判別し、L値、a値およびb値を判定した。結果を表2に示す。表2から明らかなように、毛織物においても絹織物においてと同様に、小麦色から黒褐色まできれいに染色された。
【0032】
【表2】
Figure 0003698769
【0033】
実施例13〜14および比較例11〜13
酵素精練した綿織物の代わりにレーヨン100%の筒縫い生地(品番KZ5698:東洋紡(株)社製)を用いたことと、処理時間を3時間にしたこと以外、実施例1〜6と同様にして、浸漬処理した。
【0034】
また、比較例として、緩衝液にチロシナーゼおよび/またはL−チロシンを添加しなかった以外、実施例13〜14と同様にして、浸漬処理を行った。なお、比較例11では浸漬処理は行わなかった。
【0035】
処理後、これらレーヨン生地を十分に水洗し、風乾させたのち、実施例1〜6と同様にして、目視により色彩を判別し、L値、a値およびb値を測定した。結果を表3に示す。表3から明らかなように、レーヨン生地においても綿織物においてと同様に、小麦色から黒褐色まできれいに染色された。
【0036】
【表3】
Figure 0003698769
【0037】
実施例15〜16および比較例14〜16
酵素精練した綿織物の代わりに綿/レーヨン(経糸:綿、横糸:レーヨン)の筒縫い生地(品番FZ3311:東洋紡(株)社製)を用いたことと、処理時間を3時間にしたこと以外、実施例1〜6と同様にして、浸漬処理した。
【0038】
また、比較例として、緩衝液にチロシナーゼおよび/またはL−チロシンを添加しなかった以外、実施例15〜16と同様にして、浸漬処理を行った。なお、比較例14では浸漬処理は行わなかった。
【0039】
処理後、これら綿/レーヨン生地を十分に水洗し、風乾させたのち、実施例1〜6と同様にして、目視により色彩を判別し、L値、a値およびb値を測定した。結果を表4に示す。表4から明らかなように、綿/レーヨン生地においても綿織物においてと同様に、小麦色から黒褐色まできれいに染色された。
【0040】
【表4】
Figure 0003698769
【0041】
実施例17
第1剤
・L−チロシン 0.05g
・酢酸アンモニウム 0.04g
第1剤として上記材料に精製水を加えて100ml(pH7.0)とし、水溶液を調製した。
第2剤
第2剤としてマッシュルーム50gを裁断し、これに20mMリン酸カリウム緩衝液(pH7.0)200mlを加え、4℃で18時間撹拌した後、不溶物を濾別しチロシナーゼ抽出液130mlを調製した。この抽出液のチロシナーゼ活性は1500ユニット/mlであった。
【0042】
精練漂白した綿100%のトレーナー用生地(裏毛付き厚地ニット、15cm×20cm、10g:品番A52736:倉敷紡績(株)社製)を上記第1剤に浸漬し、室温で15分間放置して十分生地内に浸透させた。その後、上記第2剤の酵素液50mlを加え、30℃で5時間放置した後、湯で洗浄し未反応のチロシン等を洗い流し乾燥させた。目視により色彩を判別すると焦げ茶色であり、実施例1〜6と同様にして、L値、a値およびb値を判定したところ順に30.13、2.13および5.10であった。
【0043】
メラニン色素前駆体水溶液に浸漬させた後、酵素水溶液に浸漬処理しても染色可能であることがわかった。
【0044】
【発明の効果】
本発明による染色法を採用することにより、環境を汚染することなく、pH、温度および圧力等が穏和な条件で安全な作業環境にて、繊維を効率よく簡便に染色することができる。また、淡小麦色から黒褐色の天然色に染まった。手触りが柔らかく風合いもよい繊維を得ることができる。さらに、該繊維にはメラニン色素の紫外線遮断能も付与されている。
【図面の簡単な説明】
【図1】 色彩および色調とL値、a値およびb値との関係を示す。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fiber dyeing method using an enzyme, and more particularly to a fiber dyeing method using tyrosinase.
[0002]
[Prior art]
Conventionally, dyes used for dyeing fibers are roughly classified into acid dyes, basic dyes, direct dyes, vat dyes, disperse dyes, reactive dyes, fluorescent dyes, and the like. Most of these dyes widely used in the textile industry are chemically synthesized products, which not only requires great equipment and cost for environmental pollution and its waste liquid treatment, but also extreme pH, high temperature and high pressure. There is a problem that the fiber must be dyed under a dangerous working environment such as conditions, and the fiber is damaged.
[0003]
As one solution to this problem, JP-A-6-316874 discloses an aqueous medium containing an enzyme such as peroxidase, polyphenol oxidase, bilirubin oxidase, laccase, ascorbate oxidase, catalase, and preferably the medium contains the enzyme. A cotton dyeing method is disclosed in which a cotton to be treated is dipped in a substrate to which a substrate is added, and subjected to appropriate treatment for dyeing. However, according to the publication, tyrosinase is not mentioned as an enzyme, and only colored cotton is applied as treated cotton.
[0004]
In recent years, an attempt has been made to mix a specific enzyme and its substrate under a certain condition to produce a melanin pigment and to dye using the melanin pigment. The composition is disclosed in Yale Journal of Biology and Medicine (46, 500-507, 1973), JP-A-3-77813 and JP-B-6-69945.
[0005]
In Yale Journal of Biology and Medicine (46, 500-507, 1973), cell-free extracts from mushroom tyrosinase and mouse melanoma (melanoma) as an enzyme, and L- as a substrate A method for enzymatic synthesis of melanin pigments using dopa is published. The properties of melanin prepared by this method are reported in the same journal, but no mention is made of application examples and application methods of melanin to fibers.
[0006]
Japanese Patent Application Laid-Open No. 3-77813 discloses a hair dyeing composition using tyrosinase or laccase as an enzyme and monophenol containing tyrosine or the like as a substrate or diphenol containing dopa or the like. Since it is not possible to enter the dyeing process only after the treatment, the series of processes becomes complicated. Moreover, the time problem of requiring 6 days until melanin pigment | dye produces | generates has arisen.
[0007]
In Japanese Patent Publication No. 6-69945, an enzyme such as beta-tyrosinase (tyrosine phenol lyase), melanin precursor consisting of L- or DL-serine and pyrocatechol or sodium pyruvate, pyrocatechol and ammonium acetate, and an aromatic amine are used. A hair dyeing composition is provided. This method is characterized in that the light fastness is improved by bonding the amine incorporated during the melanin production process and the carboxyl group of the hair protein. However, there is no mention of a composition for producing and staining melanin from a melanin precursor such as tyrosine or dopa with tyrosinase (catechol oxidase, monophenol monooxygenase).
[0008]
[Problems to be solved by the invention]
The present invention is a novel dyeing fiber efficiently and easily without causing physical and chemical damage to the fiber in a safe working environment under mild conditions such as pH, temperature and pressure without polluting the environment. It aims to provide a simple method.
[0009]
It is another object of the present invention to provide a fiber dyeing method that provides fibers having high light fastness after dyeing.
[0010]
Means for Solving the Problem and Embodiment of the Invention
The present invention relates to a fiber dyeing method characterized by treating fibers with an aqueous solution containing tyrosinase and a melanin pigment precursor.
[0011]
Examples of fibers that can be treated by the dyeing method of the present invention include silk, hemp, cellulose-based regenerated fibers (rayon, cupra, etc.), cellulosic semi-synthetic fibers (acetates, etc.), and purified cellulosic fibers (Tencel: Cotele, Austria). Trademarks), fibers made of wool, silk, and the like, and blended products of these and synthetic fibers can be exemplified. In the present invention, unprocessed fibers and processed products such as yarns, woven fabrics, knitted fabrics, and nonwoven fabrics can be dyed. In particular, in this invention, it uses suitably for the fiber which has cellulose as a main component, such as silk, rayon, a cupra, and a tencel, or those blended products.
[0012]
When processing a processed product of fibers that have not been scoured, it is preferable to pre-treat with a scouring agent or to add a scouring agent to the enzyme solution. As the scouring agent, those used for usual scouring treatments such as cationic, anionic and nonionic surfactants and enzyme scouring agents such as pectinase, cellulase, macerating enzyme, lipase, protease and the like are preferably used. .
[0013]
The tyrosinase used in the present invention is also called catechol oxidase, monophenol monooxygenase or phenolase. Tyrosinase enzyme is an enzyme that acts on melanin pigment precursors such as tyrosine, dopa, dopaquinone, and leucodopachrome to produce melanin pigments. Tyrosinase extracted from a mushroom or animal skin cell extract or a culture solution of bacteria such as Aspergillus genus, Neurospora genus, Streptomyces genus and the like is preferable. Moreover, you may use this enzyme 1 type or in mixture of 2 or more types.
[0014]
The concentration of the tyrosinase used in the staining method of the present invention in the aqueous solution is preferably 0.1 to 10,000 units / ml. If the concentration is less than 0.1 units / ml, it cannot be efficiently dyed. Exceeding 1,000 units / ml is not preferable because it is difficult to control dyeing (color density, brightness, etc.). Here, 1 unit is an amount defined as the amount of enzyme that increases the absorbance at 280 nm by 0.001 per minute using L-tyrosine as a substrate. For example, 1 unit of commercially available mushroom-derived tyrosinase is 0.3 μg.
[0015]
Melanin pigment precursors such as tyrosine, dopa, dopaquinone and leucodopachrome are used as the melanin pigment precursor, and the concentration of these melanin pigment precursors in an aqueous solution should be 0.0001 to 0.5% by weight. preferable. If it is less than 0.0001% by weight, it cannot be dyed efficiently, and if it exceeds 0.5% by weight, the raw material cost increases and it is economically disadvantageous.
[0016]
The pH of the aqueous solution is adjusted to 3-10. For pH adjustment, a buffer solution such as a phosphate buffer or an acetate buffer may be used as the aqueous solution.
[0017]
In the staining method of the present invention, unprocessed or already processed fibers are immersed in an aqueous solution containing such an enzyme and a melanin pigment precursor. Alternatively, the fibers may be immersed in an aqueous enzyme solution and then immersed in an aqueous melanin precursor solution, or in reverse order, that is, immersed in an aqueous melanin precursor solution and then immersed in an aqueous enzyme solution. Also good. Preferably, it is an immersion treatment in an aqueous solution containing an enzyme and a melanin pigment precursor.
[0018]
What is necessary is just to adjust processing time suitably with the titer of an enzyme, the usage-amount, and the density | concentration of a melanin pigment precursor. For example, if the enzyme titer is high and the amount used is large, the time is short. If the amount is low and the amount is small, the time is long. Is preferably 1 to 4 hours.
[0019]
The immersion treatment can be performed at a temperature of 10 to 80 ° C, and 20 to 50 ° C is particularly preferable. During this time, the treatment liquid is agitated and shaken as necessary.
[0020]
Thereafter, the fiber to be treated is brought into good contact with air, preferably by blowing air. This is for the purpose of completely oxidizing the melanin pigment precursor to the melanin pigment to eliminate uneven dyeing and to improve the deposition of the pigment on the fiber.
[0021]
In this way, sufficient dyeing can be performed with a gentle dyeing process in a relatively short time. Also, because of the mild treatment, there is no physical or chemical damage to the fiber.
[0022]
After immersing in a safe working environment under such mild conditions, if washed thoroughly with water and air-dried, fibers dyed from a light wheat color to a black-brown natural color are obtained depending on the treatment conditions . The fibers dyed according to the present invention have a soft hand and a good texture. The fiber to be treated is also given the ability to block UV rays from melanin pigments. Further, the waste liquid treatment is extremely simple as compared with the dyeing method using synthetic dyes, and there are almost no problems in terms of occupational hygiene.
[0023]
【Example】
The invention is further illustrated by the following examples.
[0024]
Examples 1-6 and Comparative Examples 1-5
After 100% cotton fabric for trainers (thick fabric knit with back hair, 3cm x 3cm, 0.3g: product number A52736: Kurashiki Spinning Co., Ltd.) was scoured with pectinase PL (manufactured by Amano Pharmaceutical Co., Ltd.), 20 mM potassium phosphate buffer (pH 7.0) in which mushroom-derived tyrosinase (product number T-7755: manufactured by Sigma Chemical Company) and L-tyrosine were dissolved so as to have the concentrations (% by weight) shown in Table 1 It was immersed in 9 ml (bath ratio 1:30) and treated at 30 ° C. for 20 hours while reciprocally shaking at 100 rpm.
[0025]
Further, as a comparative example, immersion treatment was performed in the same manner as in the above example except that tyrosinase and / or L-tyrosine was not added to the buffer solution. In Comparative Example 1, no immersion treatment was performed.
[0026]
After the treatment, these cotton fabrics were washed thoroughly with water and air-dried, and then the color was visually determined. Further, the color difference meter (CR-200 type: manufactured by Minolta Camera Co., Ltd.) was used to determine the L value and a value of the cotton fabric. And b values were determined. The results are shown in Table 1.
[0027]
[Table 1]
Figure 0003698769
[0028]
As is clear from Table 1, when Examples 1 to 6 were compared with Comparative Example 1 for L, a and b values, various changes were shown depending on the amounts of L-tyrosine and tyrosinase added. The result is consistent with the visual result. From Comparative Examples 2 to 5, it was proved that the cotton fabric could not achieve the dyeing effect even if either L-tyrosine or tyrosinase was missing. Moreover, when the L-tyrosine concentration and the tyrosinase concentration were increased, the brightness of the color decreased. It was confirmed by visual observation that the dyeing was fine from wheat to black brown. The relationship between the color and tone and the L value, a value, and b value is as shown in FIG.
[0029]
Examples 7-12 and Comparative Examples 6-10
A dipping treatment was carried out in the same manner as in Examples 1 to 6 except that plain woven wool fabric (product number G3525: Kurashiki Boseki Co., Ltd.) after washing was used instead of enzyme-scoured cotton fabric.
[0030]
Moreover, as a comparative example, immersion treatment was performed in the same manner as in Examples 7 to 12 except that tyrosinase and / or L-tyrosine was not added to the buffer solution. In Comparative Example 6, no immersion treatment was performed.
[0031]
After the treatment, these woolen fabrics were sufficiently washed with water and air-dried, and then the colors were visually determined in the same manner as in Examples 1 to 6, and the L value, a value, and b value were determined. The results are shown in Table 2. As is apparent from Table 2, the woolen fabric was dyed cleanly from wheat to black brown as in the silk fabric.
[0032]
[Table 2]
Figure 0003698769
[0033]
Examples 13-14 and Comparative Examples 11-13
Example 1-6 except that 100% rayon tube stitch fabric (product number KZ5698: manufactured by Toyobo Co., Ltd.) was used in place of enzyme-scoured cotton fabric and the treatment time was 3 hours. And soaked.
[0034]
Moreover, as a comparative example, immersion treatment was performed in the same manner as in Examples 13 to 14 except that tyrosinase and / or L-tyrosine was not added to the buffer solution. In Comparative Example 11, no immersion treatment was performed.
[0035]
After the treatment, these rayon doughs were sufficiently washed and air-dried, and then the colors were visually determined in the same manner as in Examples 1 to 6, and the L value, a value, and b value were measured. The results are shown in Table 3. As apparent from Table 3, the rayon dough was dyed cleanly from wheat to black brown as in the cotton fabric.
[0036]
[Table 3]
Figure 0003698769
[0037]
Examples 15-16 and Comparative Examples 14-16
A cotton / rayon (warp: cotton, weft: rayon) tube-stitched fabric (part number FZ3311: manufactured by Toyobo Co., Ltd.) was used in place of the enzyme-scoured cotton fabric, and the treatment time was 3 hours. The immersion treatment was performed in the same manner as in Examples 1-6.
[0038]
Moreover, as a comparative example, immersion treatment was performed in the same manner as in Examples 15 to 16 except that tyrosinase and / or L-tyrosine was not added to the buffer. In Comparative Example 14, no immersion treatment was performed.
[0039]
After the treatment, these cotton / rayon fabrics were sufficiently washed with water and air-dried, and then the colors were visually determined in the same manner as in Examples 1 to 6, and the L value, a value, and b value were measured. The results are shown in Table 4. As is apparent from Table 4, the cotton / rayon fabric was also dyed cleanly from wheat to black brown as in the cotton fabric.
[0040]
[Table 4]
Figure 0003698769
[0041]
Example 17
First agent, L-tyrosine 0.05g
・ Ammonium acetate 0.04g
As a first agent, purified water was added to the above material to make 100 ml (pH 7.0) to prepare an aqueous solution.
2nd agent 50 g of mushroom as 2nd agent was cut, 200 ml of 20 mM potassium phosphate buffer (pH 7.0) was added thereto, and the mixture was stirred at 4 ° C. for 18 hours. The insoluble matter was filtered off and 130 ml of tyrosinase extract was removed. Prepared. The tyrosinase activity of this extract was 1500 units / ml.
[0042]
Scoured and bleached 100% cotton fabric for trainers (thick knit with lining, 15cm x 20cm, 10g: product number A52736: Kurashiki Boseki Co., Ltd.) is immersed in the first agent and left at room temperature for 15 minutes. Thoroughly penetrated into the dough. Thereafter, 50 ml of the enzyme solution of the second agent was added and allowed to stand at 30 ° C. for 5 hours, followed by washing with hot water to wash away unreacted tyrosine and the like, followed by drying. When the color was visually discriminated, it was dark brown. When the L value, a value, and b value were determined in the same manner as in Examples 1 to 6, they were 30.13, 2.13, and 5.10.
[0043]
It was found that dyeing was possible even after immersion in an aqueous enzyme solution after immersion in an aqueous melanin dye precursor solution.
[0044]
【The invention's effect】
By employing the dyeing method according to the present invention, fibers can be efficiently and easily dyed in a safe working environment under mild conditions such as pH, temperature, and pressure without polluting the environment. In addition, it was dyed from a light wheat to a dark brown natural color. Fibers that are soft to the touch and have a good texture can be obtained. Furthermore, the ultraviolet-blocking ability of a melanin pigment | dye is provided to this fiber.
[Brief description of the drawings]
FIG. 1 shows the relationship between color and tone, L value, a value, and b value.

Claims (4)

チロシナーゼおよびメラニン色素前駆体を含有する水溶液によりセルロース系繊維を処理することを特徴とする繊維染色法。A fiber dyeing method comprising treating a cellulosic fiber with an aqueous solution containing tyrosinase and a melanin pigment precursor. チロシナーゼがマッシュルーム、アスペルギルス属、ノイロスポーラ属、ストレプトマイセス属の菌または動物由来の酵素であることを特徴とする請求項1記載の方法。  2. The method according to claim 1, wherein the tyrosinase is a mushroom, Aspergillus genus, Neurospora genus, Streptomyces bacterium or animal-derived enzyme. メラニン色素前駆体がチロシン、ドーパ、ドーパキノンおよびロイコドーパクロムから選ばれる請求項1記載の方法。  The method according to claim 1, wherein the melanin pigment precursor is selected from tyrosine, dopa, dopaquinone and leucodopachrome. チロシナーゼおよびメラニン色素前駆体を含有することを特徴とするセルロース系繊維染色用組成物。A cellulosic fiber dyeing composition comprising a tyrosinase and a melanin pigment precursor.
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JP4578221B2 (en) * 2004-12-08 2010-11-10 月桂冠株式会社 Method for producing melanin precursor
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JP2010115213A (en) * 2010-03-02 2010-05-27 Gekkeikan Sake Co Ltd Method for producing melanin precursor
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