CN109440447A - A kind of biological colour fading method of the useless cloth of sulphur black - Google Patents
A kind of biological colour fading method of the useless cloth of sulphur black Download PDFInfo
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- CN109440447A CN109440447A CN201811241256.6A CN201811241256A CN109440447A CN 109440447 A CN109440447 A CN 109440447A CN 201811241256 A CN201811241256 A CN 201811241256A CN 109440447 A CN109440447 A CN 109440447A
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- Prior art keywords
- cloth
- sulphur black
- sulphur
- biological
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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
- D06L4/13—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen using inorganic agents
-
- 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
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of biological colour fading methods of the useless cloth of sulphur black, the useless cloth of sulphur black is mainly impregnated using the mixed solution of esterase, peroxide and soluble hydroxide, react 40-180min, then the useless cloth of cleaning sulphur black, again using the useless cloth of sulphur black after Strong oxdiative object solution soaking and washing, cloth that sulphur black can give up fades.Biology of the invention fades method without using environmentally harmful reagent, does not generate sulfur-bearing, chlorine contained exhaust gas and acid, can damage to avoid these exhaust gas and acid to the body of operator and pollute to external environment；The esterase used has specificity, only reacts, will not be impacted to other factors to the thioester bond in dyestuff；The esterase used be it is biodegradable, after reaction, can be utilized by other bio-absorbables in nature；The acid generated in soluble hydroxide and reaction process carries out neutralization reaction heat production, greatly accelerates reaction speed, improves the efficiency of processing.
Description
Technical field
The present invention relates to technical field of textile printing, and in particular to a kind of biological colour fading method of the useless cloth of sulphur black.
Background technique
The useless cloth of common sulphur black has sulphur black refuse yarn line and useless cloth etc., and sulphur black refuse yarn line/useless cloth tradition is faded
Method is mainly faded using sodium chlorite oxidation, which can generate chlorine, and chlorine can not only pollute air,
Acidification can be caused to pollute to surrounding water, soil, also the body of operator can be caused centainly to endanger.Use traditional colour fading side
When method fades to sulphur black refuse yarn/useless cloth, required fading time is longer, and the time needed is the useless of other dyeings
Twice of yarn/useless cloth fading time with this has seriously affected production efficiency.In addition, useless to sulphur black using traditional colour fading method
The higher cost that yarn/useless cloth fades, the cost needed be twice of refuse yarn/useless cloth colour fading cost of other dyeings with
On.
Therefore, it is necessary to the biologies of a kind of safety non-pollution, the useless cloth of sulphur black that the reaction time is short, processing cost is low to fade
Method.
Summary of the invention
The purpose of the present invention is to provide a kind of safety non-pollution, will not generate contaminated fluid and gas, reaction time it is short,
The biological colour fading method of the useless cloth of the low sulphur black of processing cost.
The technical solution adopted by the present invention is that: a kind of sulphur black gives up the biological colour fading method of cloth, mainly using esterase,
The mixed liquid dipping sulphur black of peroxide and soluble hydroxide gives up cloth, reacts 40-180min, then cleans sulphur black
Useless cloth, then using the useless cloth of sulphur black after Strong oxdiative object soaking and washing, cloth that sulphur black can give up fades.
Preferably, the biological colour fading method of the useless cloth of sulphur black, specifically includes the following steps:
1) water, esterase, peroxide solutions and soluble hydroxide are sequentially added in process container, are stirred
It is even；
2) sulphur black is given up in cloth investment process container, so that liquid-immersed sulphur black in process container is given up cloth, puts
Set reaction 40-180min；
3) the sulphur black cloth that gives up is cleaned to no loose colour and slurry with clear water；
4) the useless cloth of sulphur black after cleaning is put into another process container, injects Strong oxdiative object solution, impregnates
15min-12h, cloth that sulphur black can give up fade.
Preferably, the useless cloth of the sulphur black includes sulphur black refuse yarn line and/or the useless cloth of sulphur black.The biology colour fading method
It can be used for fading on sulphur black refuse yarn line, the cloth that can be used for giving up sulphur black fades, and can be used for that sulphur black will be contained
The mixing cloth of refuse yarn line and the useless cloth of sulphur black fades.
Preferably, the peroxide solutions include in hydrogenperoxide steam generator, SODIUM PERCARBONATE solution and calper calcium peroxide solution
At least one.
Preferably, content >=30% of the hydrogen peroxide, content >=13% of the SODIUM PERCARBONATE, the calper calcium peroxide
Content >=50%.
Preferably, the soluble hydroxide includes at least one of potassium hydroxide, sodium hydroxide and barium hydroxide.
Strong oxdiative object solution includes at least one of hydrogenperoxide steam generator and liquor potassic permanganate；Hydrogenperoxide steam generator
Concentration is 30-35wt%, and the mass concentration of potassium permanganate is 5-10wt%.
Preferably, in step 1), esterase, peroxide solutions, soluble hydroxide and the water quality ratio of addition are 1:
10-30:0-2:150-600；It is furthermore preferred that esterase, peroxide solutions, soluble hydroxide and the water quality ratio of addition are
1:18-25:1-2:450-600, it is furthermore preferred that esterase, peroxide solutions, soluble hydroxide and the water quality ratio of addition
For 1:18-22:1.5-2:450-550, more specifically, esterase, peroxide solutions, soluble hydroxide and the water quality of addition
Amount is than being 1:18:1.5:450, more specifically, esterase, peroxide solutions, soluble hydroxide and the water quality ratio of addition
For 1:19:2:550.
Preferably, in step 1), esterase, peroxide solutions, soluble hydroxide and the water quality ratio of addition are 1:
20:1.7:500。
The esterase that the present invention uses is a kind of protein with specificity, is only reacted the thioester bond in dyestuff, will not
Other factors are impacted, esterase be it is biodegradable, after reaction, esterase in nature can be by other bio-absorbables
It utilizes, not can cause environmental pollution.
The reagent that the present invention uses mainly has esterase, peroxide, soluble hydroxide, without using conventional method of fading
In common sodium sulfite, sodium chlorite, sulfuric acid and hydrochloric acid, do not generate sulfur-bearing, the chlorine contained exhaust gas generated in conventional method of fading
And acidic materials, the body of operator can be damaged to avoid these exhaust gas and acid and external environment is polluted.
Soluble hydroxide used in the present invention (alkali) can be used for neutralizing the acid generated in reaction process, instead
After answering, partial neutral (generally within the scope of pH 6-9) is presented in reaction solution, can cause soil acidification to avoid the liquid of discharge
Or alkalization；In addition, certain heat can be generated when soluble hydroxide and acid carry out neutralization reaction, to quickening reaction speed
Play facilitation.
Peroxide in the present invention can provide oxygen, and esterase is helped to be broken thioester bond, not the participation esterase of oxygen without
Method work；Product is water and oxygen no pollution to the environment after hydroperoxidation.
The reagent that the present invention uses is fewer, and reaction speed is fast, will not generate pollution, intractable substance, therefore should
Biology method of fading is greatly reduced than conventional vulcanized black refuse yarn/useless cloth fade treatment cost.
Preferably, the mass ratio of the useless cloth of the sulphur black in step 2) and the middle water added of step 1) is 1:3-6.More preferably
, the mass ratio of the water added in the useless cloth of sulphur black and step 1) in step 2) is 1:5-6, specifically, in step 2)
The mass ratio of the water added in the useless cloth of sulphur black and step 1) is 1:5.
Preferably, the peroxide solutions of the injection in step 4) and the mass ratio of the useless cloth of sulphur black in step 2) are
1-10:1.The mass ratio of cloth it is furthermore preferred that the sulphur black in the peroxide solutions of the injection in step 4) and step 2) gives up
It is 4:1.
Preferably, the material of the process container is stainless steel.
The beneficial effects of the present invention are: biology of the invention fades method without using sodium sulfite, sodium chlorite, sulfuric acid and
Hydrochloric acid does not generate sulfur-bearing, chlorine contained exhaust gas and acid, can damage to avoid these exhaust gas and acid to the body of operator and right
External environment pollutes；The esterase used is a kind of protein with specificity, is only risen to the thioester bond in dyestuff anti-
It answers, other factors will not be impacted；The esterase used be it is biodegradable, after reaction, nature can be with
It is utilized by other bio-absorbables；Liquid after reaction is in neutrality, and can cause soil acidification or alkalization to avoid the liquid of discharge；
The acid generated in soluble hydroxide and reaction process carries out neutralization reaction heat production, greatly accelerates reaction speed, improves
The efficiency of processing.
Specific embodiment
Embodiment 1
A kind of biological colour fading method of the useless cloth of sulphur black, comprising the following steps:
1) it is 30cm in diameter, sequentially adds 8kg water, 15g esterase, 250g in rustless steel container that 20kg water can be accommodated
32wt% hydrogen peroxide and 15g potassium hydroxide, are uniformly mixed；
2) 2kg sulphur black refuse yarn line is put into rustless steel container, keeps the liquid-immersed sulphur black in rustless steel container useless
Yarn, placing response 40min；
3) sulphur black refuse yarn line is cleaned with clear water to no loose colour and slurry；
4) the sulphur black refuse yarn line after cleaning is put into another rustless steel container, injects the 32wt% hydrogen peroxide of 5kg,
60min is impregnated, cloth that sulphur black can give up fades.
Embodiment 2
A kind of biological colour fading method of the useless cloth of sulphur black, comprising the following steps:
1) diameter be 1.8m, 3000kg water can be accommodated rustless steel container in sequentially add 2500kg water, 5kg esterase,
The 50wt% calper calcium peroxide of 150kg, is uniformly mixed；
2) by the useless cloth investment rustless steel container of 500kg sulphur black, keep the liquid-immersed sulphur black in rustless steel container useless
Cloth, placing response 60min；
3) the sulphur black cloth that gives up is cleaned to no loose colour and slurry with clear water；
4) by the 35wt% hydrogen peroxide of the useless cloth injection 200kg of sulphur black after cleaning, 3h is impregnated, sulphur black can be given up
Cloth fades.
Embodiment 3
A kind of biological colour fading method of the useless cloth of sulphur black, comprising the following steps:
1) diameter be 1.8m, 3000kg water can be accommodated rustless steel container in sequentially add 3000kg water, 10kg esterase,
The 30wt% hydrogen peroxide and 15kg sodium hydroxide of 200kg, is uniformly mixed；
2) by the 1000kg sulphur black refuse yarn line mixed and the useless cloth investment rustless steel container of sulphur black, make rustless steel container
In liquid-immersed sulphur black give up cloth, placing response 3h；
3) the sulphur black cloth that gives up is cleaned to no loose colour and slurry with clear water；
4) the 8wt% potassium permanganate that the useless cloth of sulphur black after cleaning was injected to 400kg, impregnates 6h, can will vulcanize
Black useless cloth fades.
Embodiment 4
A kind of biological colour fading method of the useless cloth of sulphur black, comprising the following steps:
1) 3000kg water, 7kg esterase, 150kg are sequentially added in having a size of the pond 4m × 2.3m × 1.2m
The barium hydroxide of 30wt% hydrogen peroxide and 14kg, is uniformly mixed；
2) by the 500kg sulphur black refuse yarn line mixed and/or the useless cloth investment rustless steel container of sulphur black, hold stainless steel
The useless cloth of liquid-immersed sulphur black in device, placing response 50min；
3) the sulphur black cloth that gives up is cleaned to no loose colour and slurry with clear water；
4) the useless cloth of sulphur black after cleaning is put into another process container, injected the 30wt% peroxidating of 200kg
Hydrogen and 60 DEG C of water make the useless cloth of liquid-immersed sulphur black impregnate 120min, and cloth that sulphur black can give up fades.
Embodiment 5
A kind of biological colour fading method of the useless cloth of sulphur black, comprising the following steps:
1) 4300kg water, 10kg esterase, 300kg are sequentially added in having a size of the pond 4m × 2.3m × 1.2m
13wt% SODIUM PERCARBONATE, is uniformly mixed；
2) by the 1000kg sulphur black refuse yarn line mixed and/or the useless cloth investment rustless steel container of sulphur black, make stainless steel
The useless cloth of liquid-immersed sulphur black in container, placing response 180min；
3) the sulphur black cloth that gives up is cleaned to no loose colour and slurry with clear water；
4) it will be put into another process container in the useless cloth of sulphur black after cleaning, injected the 30wt% peroxide of 400kg
Change hydrogen and 60 DEG C of water, so that the useless cloth of liquid-immersed sulphur black is impregnated 120min, cloth that sulphur black can give up fades.
Comparative example 1
Comparative example 1 is conventional method of fading.
A kind of conventional colour fading method of the useless cloth of sulphur black, comprising the following steps:
1) sequentially added in having a size of the pond 4m × 2.3m × 1.2m 4300kg water, 1000kg sulphur black give up cloth,
350kg sodium chlorite and 20kg sulfuric acid or hydrochloric acid impregnate 8h；
2) the sulphur black cloth that gives up is cleaned to no loose colour and slurry with clear water；
3) sodium hypochlorite and water that the 10wt% of 400kg will be injected in the useless cloth of sulphur black after cleaning, soak liquid
Do not have the useless cloth of sulphur black to impregnate 2h, cloth that sulphur black can give up fades.
The sulphur black of embodiment 1-5 gives up the biological colour fading method of cloth, without using sodium sulfite, sodium chlorite, sulfuric acid and
Hydrochloric acid does not generate sulfur-bearing, chlorine contained exhaust gas and acid.The time of pre-processing is only 45min to 180min, and can give up sulphur black cloth
Material pigment structure is processed into oxidizable state, and the cloth after fading can re-use, and the cost of fading of useless cloth per ton is only
2200-2500 member.And traditional colour fading method in comparative example 1, pre-processing are needed using sodium sulfite, sodium chlorite, secondary chlorine
Sour sodium, sulfuric acid and hydrochloric acid, the exhaust gas of generation can cause certain harm to environment and operator, and the processing time is up to 8 hours,
Process of fading generates a large amount of waste water, and cotton fiber will receive certain damage, need to be with various postprocessing working procedures (such as at waste liquid
Reason), the cost of processing is substantially increased, the cost of fading of useless cloth per ton is 4000-4500 member, reduces production efficiency.Hair
Bright people has found in an experiment, and compared with traditional colour fading method in comparative example 1, the biology of the useless cloth of sulphur black of the invention fades
Fibre strength enhancing 30% of the fibre strength of method treated useless cloth than traditional colour fading method treated useless cloth.
Claims (10)
- A kind of biological colour fading method of cloth 1. sulphur black gives up, which is characterized in that using esterase, peroxide and soluble hydrogen-oxygen The mixed solution of compound impregnates the useless cloth of sulphur black, reacts 40-180min, then cleans the useless cloth of sulphur black, then use strong oxygen The useless cloth of sulphur black after compound solution soaking and washing, cloth that sulphur black can give up fade.
- The biological colour fading method of cloth 2. sulphur black according to claim 1 gives up, which comprises the following steps:1) water, esterase, peroxide and soluble hydroxide are sequentially added in process container, are uniformly mixed；2) sulphur black is given up in cloth investment process container, so that liquid-immersed sulphur black in process container is given up cloth, places anti- Answer 40-180min；3) the sulphur black cloth that gives up is cleaned to no loose colour and slurry with clear water；4) the useless cloth of sulphur black after cleaning is put into another process container, injects Strong oxdiative object solution, impregnates 15min- 12h, cloth that sulphur black can give up fade.
- The biological colour fading method of cloth 3. sulphur black according to claim 1 or 2 gives up, which is characterized in that the sulphur black Useless cloth includes sulphur black refuse yarn line and/or the useless cloth of sulphur black.
- The biological colour fading method of cloth 4. sulphur black according to claim 1 or 2 gives up, which is characterized in that the peroxidating Object includes at least one of hydrogenperoxide steam generator, SODIUM PERCARBONATE solution and calper calcium peroxide solution.
- The biological colour fading method of cloth 5. sulphur black according to claim 4 gives up, which is characterized in that the hydrogen peroxide Content >=30%, content >=13% of the SODIUM PERCARBONATE, content >=50% of the calper calcium peroxide.
- The biological colour fading method of cloth 6. sulphur black according to claim 1 or 2 gives up, which is characterized in that the solubility Hydroxide includes at least one of potassium hydroxide, sodium hydroxide and barium hydroxide.
- The biological colour fading method of cloth 7. sulphur black according to claim 1 or 2 gives up, which is characterized in that Strong oxdiative object is molten Liquid includes at least one of hydrogenperoxide steam generator and liquor potassic permanganate；The concentration of hydrogenperoxide steam generator is 30-35wt%, high The mass concentration of potassium manganate is 5-10wt%.
- The biological colour fading method of cloth 8. sulphur black according to claim 2 gives up, which is characterized in that in step 1), addition Esterase, peroxide, soluble hydroxide and water mass ratio be 1:10-30:0-2:150-600.
- The biological colour fading method of cloth 9. sulphur black according to claim 8 gives up, which is characterized in that in step 1), addition Esterase, peroxide, soluble hydroxide and water mass ratio be 1:20:1.7:500.
- The biological colour fading method of cloth 10. sulphur black according to claim 2 gives up, which is characterized in that the sulphur in step 2) The mass ratio for changing the water added in black useless cloth and step 1) is 1:3-6；The Strong oxdiative object solution and step of injection in step 4) It is rapid 2) in sulphur black give up cloth mass ratio be 1-10:1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811241256.6A CN109440447B (en) | 2018-10-24 | 2018-10-24 | Biological fading method of vulcanized black waste cloth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811241256.6A CN109440447B (en) | 2018-10-24 | 2018-10-24 | Biological fading method of vulcanized black waste cloth |
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| CN109440447A true CN109440447A (en) | 2019-03-08 |
| CN109440447B CN109440447B (en) | 2021-10-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115074988A (en) * | 2022-06-29 | 2022-09-20 | 江西给力纺织有限公司 | Waste cloth leftover material fading treatment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103476985A (en) * | 2011-03-17 | 2013-12-25 | 丹尼斯科美国公司 | Color modification of sized fabric |
-
2018
- 2018-10-24 CN CN201811241256.6A patent/CN109440447B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103476985A (en) * | 2011-03-17 | 2013-12-25 | 丹尼斯科美国公司 | Color modification of sized fabric |
Non-Patent Citations (5)
| Title |
|---|
| 徐克仁编著: "《染色》", 31 January 2007, 中国纺织出版社 * |
| 杨东升: "《啤酒发酵与酯的形成》", 30 November 2017, 中国轻工业出版社 * |
| 林丽霞 等: "《牛仔产品艺术加工》", 28 February 2014, 东华大学出版社 * |
| 梅自强 等: "《牛仔布和牛仔服装实用手册》", 31 July 2000, 中国纺织出版社 * |
| 段钢 等: "《酶制剂应用技术问答》", 31 May 2014, 中国轻工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115074988A (en) * | 2022-06-29 | 2022-09-20 | 江西给力纺织有限公司 | Waste cloth leftover material fading treatment method |
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