CN100424257C - Method for desizing, boiling and bleaching cotton fabric by enzyme only - Google Patents
Method for desizing, boiling and bleaching cotton fabric by enzyme only Download PDFInfo
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- CN100424257C CN100424257C CNB2006100971631A CN200610097163A CN100424257C CN 100424257 C CN100424257 C CN 100424257C CN B2006100971631 A CNB2006100971631 A CN B2006100971631A CN 200610097163 A CN200610097163 A CN 200610097163A CN 100424257 C CN100424257 C CN 100424257C
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- cotton fabric
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- kiering
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Abstract
The present invention relates to re-compounding and application in cotton fabric treatment of enzyme preparation, and is especially enzyme process for desizing, boiling off and bleaching cotton fabric. Different enzyme preparation is first re-compounded with alpha-amylase, PVA degrading enzyme, lipase, proteinase, alkaline pectase, xylanase, cellulase, sugar oxidase, etc based on different fabric pre-treating requirements; and then used in desizing, boiling off and bleaching cotton fabric to replace traditional concentrated alkali solution and high temperature chemical process. The present invention has low power consumption and environment friendship.
Description
Technical field
A kind of method of all with enzyme COTTON FABRIC being carried out destarch, kiering and bleaching relates to the composite of plurality of enzymes preparation and the applied technical field in cotton pretreatment technology thereof.
Background technology
Traditional COTTON FABRIC destarch, kiering, bleaching process be high temperature, high-alkali, high energy consumption normally, not environmental protection.Use enzyme COTTON FABRIC is carried out destarch, kiering, bleaching respectively, the treatment conditions gentleness, little to the damage of fabric, energy-conservation province consumption, environmental friendliness.The pre-treatment of COTTON FABRIC is all carried out with enzyme process, adopts preferred composite enzyme preparation, and realizes the optimization of process conditions, is to be closely connected to produce the actual problem with Practical significance towards productivity.
Summary of the invention
The purpose of this invention is to provide and a kind of COTTON FABRIC is carried out the method that destarch, kiering, bleaching all adopt enzyme preparation to carry out, solve the drawback of present COTTON FABRIC chemistry pretreatment process high energy consumption, high pollution, fabric is not caused serious damage simultaneously.
Technical scheme of the present invention:
1) with enzyme COTTON FABRIC is carried out destarch: destarch is bathed and is consisted of: composite enzyme preparation 0.5～3.5g/L and JFC bleeding agent 4g/L; Treatment conditions are: the mass ratio that COTTON FABRIC and destarch are bathed is 1: 20, pH7.0, and 40 ℃ of temperature are handled 60min.Described composite enzyme preparation consist of PVA digestive enzyme 40%～50%, α-Dian Fenmei 30%～40%, lipase 10%～20%.PVA digestive enzyme and α-Dian Fenmei and the composite back of lipase are carried out destarch to COTTON FABRIC, can realize the biodegradation of PVA slurry, significantly reduce the discharging of PVA waste water, the damage of having avoided chemical destarch process that cotton fiber is caused simultaneously.Lipase can be degraded grease in the fabric process and the cuticular wax of fiber, thereby improves wettability of fabrics, whiteness.
2) with enzyme COTTON FABRIC is carried out kiering: kiering is bathed and is consisted of: composite enzyme preparation 0.3～1.5g/L, glucose 0.5～3g/L, BHJ-1 high-efficiency refining agent 2～5g/L, waterglass 3～10g/L and sodium ethylene diamine tetracetate 3～5g/L; Treatment conditions are: the mass ratio that COTTON FABRIC and kiering are bathed is 1: 20, pH8.0～8.5, and 50～55 ℃ of temperature are handled 60～90min.Described composite enzyme preparation consist of alkaline pectase 30%～40%, cellulase 10%～22%, protease 6%～14%, lipase 8%～22%, carbohydrate oxidase 8%～12% and zytase 10%～18%.Alkaline pectase and cellulase, protease, lipase, carbohydrate oxidase and zytase are composite to carry out kiering to COTTON FABRIC.Cellulase can improve wettability of fabrics, protease and lipase help the removal of impurity such as the protein, wax in the cotton fiber, carbohydrate oxidase during kiering is bathed is that substrate generates hydrogen peroxide with glucose, can promote the kiering effect of alkaline pectase and cellulase, zytase can effectively be removed the cotton seed hulls in the COTTON FABRIC, treatment effect can satisfy the processing request of later process, thereby has avoided the chemical treatment method of concentrated base, high temperature, energy-conservation province consumption, environmental friendliness.
3) with enzyme COTTON FABRIC is bleached: bleaching bath consists of: carbohydrate oxidase 0.5～2g/L, glucose or oligosaccharides 0.5～3g/L and JFC bleeding agent 4g/L; Treatment conditions are: the mass ratio of COTTON FABRIC and bleaching bath is 1: 20, and at first the pH value 7.0～8.0, handles 60min at 50 ℃ and generates hydrogen peroxide, transfers pH10 then, and temperature is risen to 90 ℃, and effect 60～90min bleaches.Carbohydrate oxidase is that substrate generates hydrogen peroxide with glucose or oligosaccharides, is used for the bleaching of COTTON FABRIC, need not add hydrogen peroxide, and the whiteness of handling the back fabric can reach the requirement of later process.
4) with remaining hydrogen peroxide in the enzyme removal COTTON FABRIC bleaching bath: handle to bathe consisting of: catalase 3g/L, treatment conditions are: COTTON FABRIC is 1: 10 with the mass ratio of handling bath, pH8.5, temperature is handled 8min, cold wash 5min again for 65 ℃.Application of catalase is removed remaining hydrogen peroxide in the bleaching bath, helps the carrying out of road dyeing down.
Beneficial effect of the present invention: be used for composite enzyme and comprise: α-Dian Fenmei, PVA digestive enzyme, lipase, protease, alkaline pectase, zytase, cellulase, carbohydrate oxidase and catalase etc.With biology enzyme COTTON FABRIC is carried out destarch, kiering and bleaching pre-treatment, the action condition gentleness does not cause damage to fabric, and energy consumption is low simultaneously, environmental friendliness, and fabric treating can satisfy the processing request of later process.Use the PVA digestive enzyme COTTON FABRIC is carried out destarch, can realize that the PVA slurry at the complete biodegradable in destarch stage, has significantly reduced the discharging of PVA waste water.With enzyme COTTON FABRIC is carried out kiering, alkaline pectase can the degradation of fibers top layer pectic substance, remove wax simultaneously, carbohydrate oxidase during kiering is bathed is that substrate generates hydrogen peroxide with glucose, the oxidation of hydrogen peroxide can further promote the effect to fabric fibre of alkaline pectase and cellulase, thereby improves the removal effect of enzyme to fabric impurity greatly.Protease, lipase can be removed albumen impurity and the wax in the fiber, can effectively the degrade cotton seed hulls of fabric face of zytase.Therefore, with the composite boiling that is used for COTTON FABRIC of this plurality of enzymes, the whiteness of the wetting property of the fabric that is obtained, removal of impurity and fabric is higher than the treatment effect of single alkaline pectase far away.Carbohydrate oxidase can be that substrate generates hydrogen peroxide with glucose or other oligosaccharides, is used for the bleaching of fabric, does not need to add in bleaching bath in addition hydrogen peroxide, and the whiteness of COTTON FABRIC can satisfy the processing request of later process.The pre-treatment enzyme process of COTTON FABRIC carries out, energy-conservation province consumption, and environmental friendliness is to substitute the Perfected process that traditional chemical is handled.
The specific embodiment
Embodiment 1 (reference examples):
With composite enzyme preparation (α-Dian Fenmei is 70%, lipase 30%) destarch
Fabric: textile poplin cloth (524/10cm of 15tex * 15tex * 283/10cm)
Technology: composite enzyme preparation: 2.53g/L, JFC bleeding agent 4g/L, pH7.0,40 ℃ of temperature, bath raio 1: 20 is handled 60min.
The result:
| Composite enzyme preparation | |
| Capillary effect/cm | 12.36 |
| Starch size destarch rate/% | 93.75 |
| PVA slurry clearance/% | 0 |
Embodiment 2: the composite enzyme preparation of destarch (PVA digestive enzyme 45%, α-Dian Fenmei are 38%, lipase 17%) of adding the PVA digestive enzyme
Fabric: textile poplin cloth (524/10cm of 15tex * 15tex * 283/10cm)
Technology: the composite enzyme preparation of destarch of adding the PVA digestive enzyme: 3g/L, JFC bleeding agent 4g/L, pH7.0,40 ℃ of temperature, bath raio 1: 20 is handled 60min.
The result:
| Add the composite enzyme preparation of destarch of PVA digestive enzyme | |
| Capillary effect/cm | 12.36 |
| Starch size destarch rate/% | 93.75 |
| PVA slurry clearance/% | 79.68 |
Embodiment 3 (reference examples): chemical kiering
Fabric: textile poplin cloth (524/10cm of 15tex * 15tex * 283/10cm)
Technology: alkaline scouring: NaOH 23g/L, JFC bleeding agent 5g/L, NaHSO
31g/L, Na
3PO
31g/L, pH13,95 ℃ of temperature, bath raio 1: 20 is handled 60min.
| The chemistry boiling | |
| Whiteness/Wh | 92.03 |
| Capillary effect/cm | 14.36 |
| Pectin clearance/% | 91.21 |
| Cotton seed hulls clearance/% | 85 |
| Cotton wax clearance/% | 38.29 |
| Bursting strength/N | 445 |
Embodiment 4: enzyme kiering (composite enzyme preparation: alkaline pectase 30%～35%, cellulase 15%～22%, proteinase 8 %～14%, lipase 8%～12%, carbohydrate oxidase 8%～12% and zytase 12%～18%)
Fabric: textile poplin cloth (524/10cm of 15tex * 15tex * 283/10cm)
Technology: enzyme kiering: composite enzyme preparation 1.2g/L, glucose 2.4g/L, BHJ-1 high-efficiency refining agent 3g/L, waterglass 5g/L, sodium ethylene diamine tetracetate 5g/L; PH8.5,50 ℃ of temperature, bath raio 1: 20 is handled 60min.
| The enzyme boiling | |
| Whiteness/Wh | 85.2 |
| Capillary effect/cm | 12.22 |
| Pectin clearance/% | 88.01 |
| Cotton seed hulls clearance/% | 79 |
| Cotton wax clearance/% | 34.80 |
| Bursting strength/N | 468 |
Embodiment 5 (reference examples): add hydrogen peroxide bleaching
Fabric: textile poplin cloth (524/10cm of 15tex * 15tex * 283/10cm)
Technology: use hydrogen peroxide bleaching after enzyme desizing, the enzyme kiering: 30% hydrogen peroxide 3g/L, sodium metasilicate 3.5g/L, BHJ-1 high-efficiency refining agent 3g/L, pH13,95 ℃ of temperature, bath raio 1: 20 is handled 90min.
The result:
| Directly add hydrogen peroxide bleaching | |
| Whiteness/Wh | 92.03 |
| Capillary effect/cm | 13.26 |
| Pectin clearance/% | 90.32 |
| Cotton seed hulls clearance/% | 88 |
| Cotton wax clearance/% | 35.80 |
| Bursting strength/N | 463 |
Embodiment 6: add the bleaching process that carbohydrate oxidase generates hydrogen peroxide
Fabric: textile poplin cloth (524/10cm of 15tex * 15tex * 283/10cm)
Technology: add the bleaching process that carbohydrate oxidase generates hydrogen peroxide in the bleaching bath: bleaching bath is formed: carbohydrate oxidase 1.0g/L, glucose 3g/L, JFC bleeding agent 4g/L; bath raio 1: 20, pH7.0,50 ℃ of temperature; handle 60min; transfer pH10 then, be warming up to 90 ℃, effect 6-90min bleaches.
The result:
| Enzyme generates hydrogen peroxide bleaching | |
| Whiteness/Wh | 83.87 |
| Capillary effect/cm | 11.23 |
| Pectin clearance/% | 86.91 |
| Cotton seed hulls clearance/% | 70 |
| Cotton wax clearance/% | 12.08 |
| Bursting strength/N | 478 |
Carbohydrate oxidase is that substrate generates hydrogen peroxide with glucose.
Embodiment 7: the removal of residue hydrogen peroxide in the bleaching bath
Fabric: textile poplin cloth (524/10cm of 15tex * 15tex * 283/10cm)
Contrast technology: washing: 90 ℃ of hot water wash, 5min; And then 90 ℃ of hot water wash, 5min; Last cold wash 5min;
The catalase enzyme treatment process: processing contains catalase 3g/L in bathing, bath raio 1: 10, and pH8.5, temperature is handled 8min, cold wash 5min again for 65 ℃.
The result:
| H 2O 2Residual volume (ppm) | |
| Washing is handled | 3 |
| Catalase is handled | 8 |
Claims (1)
1. method of all with enzyme COTTON FABRIC being carried out destarch, kiering and bleaching is characterized in that:
1) with enzyme COTTON FABRIC is carried out destarch: destarch is bathed and is consisted of: composite enzyme preparation 0.5～3.5g/L and JFC bleeding agent 4g/L; Treatment conditions are: the mass ratio that COTTON FABRIC and destarch are bathed is 1: 20, and pH 7.0, and 40 ℃ of temperature are handled 60min, the described composite enzyme preparation of this step 1) consist of PVA digestive enzyme 40%～50%, α-Dian Fenmei 30%～40% and lipase 10%～20%;
2) with enzyme COTTON FABRIC is carried out kiering: kiering is bathed and is consisted of: composite enzyme preparation 0.3～1.5g/L, glucose 0.5～3g/L, BHJ-1 high-efficiency refining agent 2～5g/L, waterglass 3～10g/L and sodium ethylene diamine tetracetate 3～5g/L; Treatment conditions are: the mass ratio that COTTON FABRIC and kiering are bathed is 1: 20, and pH 8.0～8.5, and 50～55 ℃ of temperature are handled 60～90min; This step 2) described composite enzyme preparation consists of alkaline pectase 30%～40%, cellulase 10%～22%, protease 6%～14%, lipase 8%～22%, carbohydrate oxidase 8%～12% and zytase 10%～18%;
3) with enzyme COTTON FABRIC is bleached: bleaching bath consists of: carbohydrate oxidase 0.5～2g/L, glucose or oligosaccharides 0.5～3g/L and JFC bleeding agent 4g/L; Treatment conditions are: the mass ratio of COTTON FABRIC and bleaching bath is 1: 20, and at first the pH value 7.0～8.0, handles 60min at 50 ℃ and generates hydrogen peroxide, transfers pH10 then, and temperature is risen to 90 ℃, and effect 60～90min bleaches;
4) with remaining hydrogen peroxide in the enzyme removal COTTON FABRIC bleaching bath: handle to bathe consisting of: catalase 3g/L, treatment conditions are: COTTON FABRIC is 1: 10 with the mass ratio of handling bath, and pH 8.5, temperature is handled 8min, cold wash 5min again for 65 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100971631A CN100424257C (en) | 2006-10-28 | 2006-10-28 | Method for desizing, boiling and bleaching cotton fabric by enzyme only |
Applications Claiming Priority (1)
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|---|---|---|---|
| CNB2006100971631A CN100424257C (en) | 2006-10-28 | 2006-10-28 | Method for desizing, boiling and bleaching cotton fabric by enzyme only |
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|---|---|
| CN1944785A CN1944785A (en) | 2007-04-11 |
| CN100424257C true CN100424257C (en) | 2008-10-08 |
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Cited By (1)
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| CN107034660A (en) * | 2017-05-25 | 2017-08-11 | 苏州凯邦生物技术有限公司 | A kind of bafta biology enzyme Type Compound Refining Agent and its application method |
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| CN101275363B (en) * | 2008-05-08 | 2010-09-08 | 江南大学 | Method for scouring and bleaching cotton fabric with combined enzyme preparation |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH108381A (en) * | 1996-01-29 | 1998-01-13 | Bayer Ag | Enzyme mixture for desizing cloth sized with starch and method for desizing |
| CN1337488A (en) * | 2000-08-11 | 2002-02-27 | 青岛大学 | Pretreating biological enzyme process for natural cellulosic fibre |
| CN1513974A (en) * | 2003-06-03 | 2004-07-21 | 江南大学 | Polyninylalcohol degradative enzyme high productive bacteria and method of its seed selection and uses said bacteria to produce polyving/alcoho/ degradation enzyme by fermentation method |
| CN1528972A (en) * | 2003-10-02 | 2004-09-15 | 江南大学 | Full-cotton woven fabric bioenzyme continuous padding and decatizing pretreatment process |
| CN1712631A (en) * | 2005-07-06 | 2005-12-28 | 江南大学 | Pre-treatment of cotton fabrics by rolling and piling up of enzyme |
| WO2006002034A1 (en) * | 2004-06-15 | 2006-01-05 | Novozymes North America, Inc | Simultaneous desizing and scouring process |
-
2006
- 2006-10-28 CN CNB2006100971631A patent/CN100424257C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH108381A (en) * | 1996-01-29 | 1998-01-13 | Bayer Ag | Enzyme mixture for desizing cloth sized with starch and method for desizing |
| CN1337488A (en) * | 2000-08-11 | 2002-02-27 | 青岛大学 | Pretreating biological enzyme process for natural cellulosic fibre |
| CN1513974A (en) * | 2003-06-03 | 2004-07-21 | 江南大学 | Polyninylalcohol degradative enzyme high productive bacteria and method of its seed selection and uses said bacteria to produce polyving/alcoho/ degradation enzyme by fermentation method |
| CN1528972A (en) * | 2003-10-02 | 2004-09-15 | 江南大学 | Full-cotton woven fabric bioenzyme continuous padding and decatizing pretreatment process |
| WO2006002034A1 (en) * | 2004-06-15 | 2006-01-05 | Novozymes North America, Inc | Simultaneous desizing and scouring process |
| CN1712631A (en) * | 2005-07-06 | 2005-12-28 | 江南大学 | Pre-treatment of cotton fabrics by rolling and piling up of enzyme |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107034660A (en) * | 2017-05-25 | 2017-08-11 | 苏州凯邦生物技术有限公司 | A kind of bafta biology enzyme Type Compound Refining Agent and its application method |
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| CN1944785A (en) | 2007-04-11 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: XUZHOU ZHONGTIAN COTTON (GROUP) CO., LTD. Assignor: Jiangnan University Contract fulfillment period: 2009.2.20 to 2012.2.20 contract change Contract record no.: 2009320000428 Denomination of invention: Method for desizing, boiling and bleaching cotton fabric by enzyme only Granted publication date: 20081008 License type: exclusive license Record date: 2009.3.18 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.2.20 TO 2012.2.20; CHANGE OF CONTRACT Name of requester: XUZHOU ZHONGTIAN COTTON INDUSTRY GROUP CO., LTD. Effective date: 20090318 |
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Granted publication date: 20081008 Termination date: 20161028 |