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EP3748065B1 - Verfahren zur gewebebleiche, produkte und verwendungen davon - Google Patents

Verfahren zur gewebebleiche, produkte und verwendungen davon Download PDF

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Publication number
EP3748065B1
EP3748065B1 EP19178847.0A EP19178847A EP3748065B1 EP 3748065 B1 EP3748065 B1 EP 3748065B1 EP 19178847 A EP19178847 A EP 19178847A EP 3748065 B1 EP3748065 B1 EP 3748065B1
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Prior art keywords
bath
minutes
amylase
previous
temperature
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English (en)
French (fr)
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EP3748065A1 (de
EP3748065C0 (de
Inventor
Jorge João ABREU FARIA
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Aquitex Acabamentos Quimicos Texteis SA
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Aquitex Acabamentos Quimicos Texteis SA
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
    • D06L4/12—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen combined with specific additives
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/40—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using enzymes

Definitions

  • the present disclosure relates to the field of textile industry and chemistry, namely textile dyeing and a process for fabric bleaching, products and uses thereof.
  • the present disclosure describes a process for fabric bleaching using a novel enzyme blend combined with a specifically designed chemical system, which reduces the use of caustic soda and hydrogen peroxide in the conventional oxidative bleaching process, replacing the manipulation of these chemicals.
  • the Textile Industry is one of the biggest industries in the world with a current worth of nearly 1.5 trillion USD. Nevertheless, it is also one of the world's top polluting industries, partaking a heavy environmental impact in terms of resource consumption, effluents contamination and textile elimination.
  • Water is a finite resource that is quickly becoming scarce and is used at every step of the process both to convey the chemicals used during that step and to wash them out before beginning the next step.
  • the water becomes full of chemical additives and is then expelled as wastewater; which in turn pollutes the environment.
  • the liquid effluents of the TI have usually a high Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD), high conductivity and colouring.
  • Naturally occurring fibres such as cotton
  • colouring materials even after scouring processes and the cause of this colour may be the naturally occurring pigments present in the fibre structure.
  • This colour can come from different contaminations occurring during the processing of natural fibres like for example, oils and greases coming from the processing equipment.
  • the bleaching process aims to eliminate all coloured contaminants that are on the fibres, as well as the remaining of other contaminants that have resisted to previous pre-treating processes (desizing, scouring, etc.) such as bark remnants of the cotton plant.
  • Chlorine is known to be extremely toxic to the environment and to consumers, while sodium hypochlorite is very hazardous to human health due to the etching effect that may cause skin and lungs damage. In its compound form, sodium hypochlorite is also very toxic to aquatic organisms and bacteria.
  • Enzymes are protein catalysts produced by living cells that catalyse specific reactions.
  • the use of enzymes in textile processes has gained increased interest due to the fact that enzymes are non-toxic, biodegradable and environmentally friendly.
  • Document WO0200823386 relates to novel compositions for biobleaching coupled with stone washing of indigo dyed denims comprising a blend of glucose oxidase, catalases and cellulases in the ratio of 1.0:10.0:1.0 along with sugar base, peroxide source and optional adjuvants, wherein the process is carried out at optimized conditions of neutral pH (6.5 - 7.0) and a temperature of 55 °C.
  • Document CN103266495 discloses a method for pre-treating a cotton-polyester blended fabric with a biological enzyme.
  • the method comprises the steps of scouring and bleaching, washing and drying and is characterized in that the scouring and bleaching step comprises the sub-step of adding the cotton-polyester blended fabric to a scouring and bleaching solution to be scoured and bleached, wherein the mass ratio of the cotton-polyester blended fabric to the scouring and bleaching solution is (1:10)-(1:20); the temperature is controlled to be 50-60 °C; the treatment time is 30-90 minutes; and the scouring and bleaching solution comprises the following components by weight percent: 2.5-3.5% of compound biological enzyme, 5-10% of hydrogen peroxide, 1-2% of tetra acetyl ethylene diamine, 0.1-0.3% of sodium cocoamphoacetate, 0.1-0.3% of ferrous sulfate and the balance of water.
  • the method has the advantages of desizing and bleaching in one bath, mild treatment conditions, small damage to the fabric and short treatment time. Further bleaching processes are disclosed in WO-A-03/002810 , US-A-2012/015860 and WO-A-2017/093677 .
  • the process of the present disclosure is a simplified treatment that results in a fabric that retains the characteristics of cotton and shows a better handle and hydrophilicity and a cleaner and smoother surface than the conventionally bleached cotton.
  • the process of the present disclosure decreases the chemical load used, namely it eliminates the use of NaOH and includes more sustainable versions of the auxiliary chemicals used.
  • An aspect of the present disclosure relates to a process for fabric bleaching comprising the following steps:
  • the process may further comprise the following steps:
  • the process may further comprise the following steps:
  • the process may further comprise the following steps:
  • the process may further comprise the following steps: adding a catalase solution to the third bath maintaining the first temperature of the bath during the catalase reaction.
  • the duration of the enzymatic reaction is at least 30 minutes, preferably from 30 minutes to 1 hour, more preferably 45 minutes.
  • the second temperature of the first bath is from 75-90 °C, preferably 80 °C.
  • the duration of the peroxidation reaction is at least 5 minutes, preferably from 5-20 minutes, more preferably 10 minutes.
  • the temperature of the second bath is from 60-90 °C, preferably 70 °C.
  • the duration of the washing is at least 5 minutes, preferably from 5-20 minutes, more preferably 10 minutes.
  • the temperature of the third bath is from 25-60 °C, preferably 40 °C.
  • the duration of the washing with the sequestering and dispersing agent is at least 5 minutes, preferably from 5-15 minutes.
  • the duration of the catalase reaction is at least 10 minutes, preferably from 10-30 minutes.
  • the blend of enzymes is:
  • the blend of enzymes further comprises oxidoreductase.
  • the liquor ratio between fabric: water is from 1:5 -1:40; preferably 1:10 -1:20.
  • the wetting agent concentration is from 0,5 - 5 % (wt/wt), preferably 1 - 2 %(wt/wt).
  • the enzyme blend concentration is from 0,5 - 5 % (wt/wt), preferably 1 - 2 %(wt/wt).
  • the sequestering and dispersing agent concentration is from 0.5 - 3 g/l, preferably 0.5 -1 g/l.
  • the catalase concentration is from 0.2 - 2 g/l.
  • the wetting agent is ethoxylated isotridecanol.
  • the sequestering and dispersing agent is 3-hydroxy-3-carboxy-1,5-pentanedioic acid.
  • Another aspect of the present disclosure relates to a bleached fabric obtainable by the process described in the present disclosure wherein the weight loss is inferior to the standard process, being less than 4.5%.
  • the fabric is a natural yarn fabric, preferably a cotton fabric.
  • Another aspect of the present disclosure also relates to an article comprising the fabric described in the present disclosure.
  • the process of the present disclosure is an alternative pre-treatment process that accomplishes fabric whitening using less water, less energy and less harsh chemicals. It minimizes environmental impact of one of the most universal cotton processing steps, the oxidative bleaching.
  • the process of the present disclosure is a simplified treatment that results in a fabric that retains the characteristics of cotton and shows a better handle and hydrophilicity and a cleaner and smoother surface than the conventionally bleached cotton.
  • the present disclosure is used to bleach all 100% cotton articles used as starting material for the Textile Industry.
  • the bleaching process is reduced from 148 min with the conventional procedure to 135 min with the process of the present disclosure, meaning a reduction of approximately 9% in process time.
  • Table 1 Comparison between 100% cotton knitted fabric bleached according to the conventional method and to the process of the present disclosure Bleaching process of figure 1 (30 min at 100°C) Process of the present disclosure as described in figure 2 HANDLE Slightly harsh handle Softer and smoother handle WHITE LEVEL (WI-BERG) 74.97 67.73 WEIGHT LOSS (%) 5.1% 4.5%
  • Table 2 Results of effluent analysis after conventional bleaching and process of the present disclosure by exhaustion.
  • the overall difference of colour can be calculated by spectrophotometric reading and it is expressed by the DE value, obtained based on the comparison between samples that went through the conventional bleaching and samples treated by the process of the present disclosure.
  • Standard values for colour tolerance accepted amongst the industry players are usually ⁇ 0.5.
  • the spectrophotometric analysis of the dyed samples shows DE values between 0.52 and 0.84, which can be attributed to the slight differences in whiteness level obtained in the samples post-bleaching.
  • This means the colour yield of samples subjected to the process of the present disclosure is not exactly the same but it is close enough to the conventionally bleached samples and, therefore, it is expected to be easy to adjust the dyeing recipes. In some cases, this colour difference will possibly mean the need to use less dyestuff.
  • the process of the present disclosure is a perfectly viable option to replace the conventional bleaching process as the final article is softer, smoother, with cleaner surface, better hydrophilicity and lower weigh loss. Even though there seems to be some variation in the colour yield, dyeing recipes are expected to be easily adjusted. When assessing the variation of colour yield against all the benefits and advantages of the process of the present disclosure, it can be deemed a manageable adaptation.
  • the process of the present disclosure allows meaningful savings in terms of water, energy and time consumption and originates less polluted effluents.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detergent Compositions (AREA)

Claims (13)

  1. Ein Verfahren zur Gewebebleiche, umfassend die folgenden Schritte:
    Herstellen eines ersten Wasserbades mit einem Netzmittel und dem Gewebe;
    wobei das erste Wasserbad auf eine erste Temperatur von maximal 40 - 60 °C erwärmt wird und der pH-Wert des Bades bei maximal pH 5,5 - 8 liegt;
    Zugeben einer Enzymmischung zu dem Bad, wobei die Enzymmischung mindestens 3 der folgenden Enzyme umfasst:
    Alpha-Amylase, Beta-Amylase, Pektatlyase, Cellulase, Endoglucanase, Lipase;
    Aufrechterhalten der ersten Temperatur des Bades während der enzymatischen Reaktion; Zugeben eines Peroxidspenders und eines Bleichaktivators zu dem Bad;
    Erwärmen des Bades auf eine zweite Temperatur von mindestens 75 °C für die Peroxidationsreaktion;
    wobei die Konzentration des Peroxidspenders 10 bis 15 g/l beträgt,
    wobei die Konzentration des Bleichaktivators 1 bis 3 g/l beträgt;
    wobei der Peroxidspender Natriumpercarbonat, Natriumperborat oder eine Mischung davon ist.
  2. Das Verfahren nach dem vorangehenden Anspruch ferner die folgenden Schritte umfassend:
    Ablassen des ersten Wasserbads;
    Entfernen chemischer Rückstände aus dem Gewebe;
    gegebenenfalls Einbringen des Gewebes in ein zweites Wasserbad mit mindestens 60 °C, um das Entfernen von Rückständen zu verbessern;
    gegebenenfalls Ablassen des Badewassers;
    gegebenenfalls Herstellen eines weiteren Wasserbades mit einem Sequestrier- und Dispergiermittel und dem Gewebe, wobei das Bad auf eine Temperatur von maximal 60 °C, bevorzugt 40 °C - 50 °C, erwärmt wird und der pH-Wert des Bades bei maximal pH 8 liegt, wobei die erste Temperatur des Bades während der Reaktionszeit aufrechterhalten wird;
    gegebenenfalls Zugaben einer Katalaselösung in das dritte Bad, wobei die erste Temperatur des Bades während der Katalasereaktion aufrechterhalten wird.
  3. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die erste Temperatur des ersten Bades bevorzugt 60 °C und der pH-Wert des ersten Bades bevorzugt 6,0 - 6,5 beträgt; und wobei die zweite Temperatur des ersten Bades 75 bis 90 °C, bevorzugt 80 °C beträgt, und wobei die Temperatur des zweiten Wasserbades 60 bis 90 °C, bevorzugt 70 °C beträgt, und wobei die Temperatur des dritten Bades 25 bis 60 °C, bevorzugt 40 °C beträgt.
  4. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die Dauer der enzymatischen Reaktion mindestens 30 Minuten, bevorzugt 30 Minuten bis 1 Stunde, besonders bevorzugt 45 Minuten beträgt.
  5. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die Dauer der Peroxidationsreaktion mindestens 5 Minuten, bevorzugt 5 bis 20 Minuten, besonders bevorzugt 10 Minuten beträgt.
  6. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die Dauer des Waschens mindestens 5 Minuten, bevorzugt 5 bis 20 Minuten, besonders bevorzugt 10 Minuten beträgt.
  7. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die Dauer des Waschens mit dem Sequestrier- und Dispergiermittel mindestens 5 Minuten, bevorzugt 5 bis 15 Minuten, beträgt.
  8. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die Dauer der Katalasereaktion mindestens 10 Minuten, bevorzugt 10 bis 30 Minuten, beträgt.
  9. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die Enzymmischung ist:
    Alpha-Amylase, Endoglucanase, Cellulase;
    Alpha-Amylase, Endoglucanase, Pektatlyase;
    Alpha-Amylase, Endoglucanase, Lipase;
    Endoglucanase, Beta-Amylase, Pektatlyase;
    Endoglucanase, Beta-Amylase, Cellulase;
    Endoglucanase, Beta-Amylase, Lipase;
    Beta-Amylase, Pektatlyase, Cellulase;
    Beta-Amylase, Pektatlyase, Lipase;
    Beta-Amylase, Cellulase, Lipase;
    Pektatlyase, Cellulase, Lipase;
    gegebenenfalls umfassend Oxidoreduktase.
  10. Das Verfahren nach einem der vorangehenden Ansprüche, wobei das Flottenverhältnis zwischen Gewebe: Wasser 1:5 bis 1:40, bevorzugt 1:10 bis 1:20 beträgt.
  11. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die Netzmittelkonzentration 0,5 bis 5 % (Gew./Gew.), bevorzugt 1 bis 2 % (Gew./Gew.) beträgt,
    gegebenenfalls,
    die Konzentrationen des Sequestrier- und des Dispergiermittels zwischen 0,5 und 3 g/l, bevorzugt zwischen 0,5 und 1 g/l liegen.
  12. Das Verfahren nach einem der vorangehenden Ansprüche, wobei die Konzentration der Enzymmischung 0,5 bis 5 % (Gew./Gew.), bevorzugt 1 bis 2 % (Gew./Gew.) und/oder die Katalasekonzentration 0,2 bis 2 g/l, bevorzugt 0,5 bis 1 g/l beträgt.
  13. Das Verfahren nach einem der vorangehenden Ansprüche, wobei das Netzmittel ethoxyliertes Isotridecanol ist, der Bleichaktivator ein Mangansalz ist, das Sequestrier- und Dispergiermittel 3-Hydroxy-3-carboxy-1,5-pentandisäure ist.
EP19178847.0A 2019-06-03 2019-06-06 Verfahren zur gewebebleiche, produkte und verwendungen davon Active EP3748065B1 (de)

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Application Number Priority Date Filing Date Title
PT11556019 2019-06-03

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EP3748065A1 EP3748065A1 (de) 2020-12-09
EP3748065C0 EP3748065C0 (de) 2025-02-19
EP3748065B1 true EP3748065B1 (de) 2025-02-19

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1425462A4 (de) * 2001-06-29 2008-01-02 Novozymes North America Inc Einzelbadherstellung von cellulosischen materialien
FI20065121L (fi) * 2006-02-17 2007-08-18 Valtion Teknillinen Menetelmä selluloosapohjaisten tekstiilimateriaalien esikäsittelemiseksi
WO2008023386A2 (en) 2006-08-25 2008-02-28 Advanced Enzyme Technologies Limited Novel compositions for biobleaching coupled with stone washing of indigo dyed denims and process thereof
DE102009001786A1 (de) * 2009-03-24 2010-10-14 Henkel Ag & Co. Kgaa Schonendes Bleichmittel
CN103266495B (zh) 2013-05-25 2015-08-05 上海秋橙新材料科技有限公司 棉涤混纺织物生物酶前处理方法

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EP3748065C0 (de) 2025-02-19

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