CN102851936A - Low damage bleaching method for wool fabric, and pure white wool fabric - Google Patents
Low damage bleaching method for wool fabric, and pure white wool fabric Download PDFInfo
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- CN102851936A CN102851936A CN2012103221331A CN201210322133A CN102851936A CN 102851936 A CN102851936 A CN 102851936A CN 2012103221331 A CN2012103221331 A CN 2012103221331A CN 201210322133 A CN201210322133 A CN 201210322133A CN 102851936 A CN102851936 A CN 102851936A
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Abstract
The present invention discloses a low damage bleaching method for a wool fabric. The low damage bleaching method specifically comprises the following steps: a pretreatment step, an oxidation step, an acid neutralization step, a reduction step, a whitening step, and a weak oxidation step, wherein the pretreatment step is performed in a pretreatment liquid with a pH value of 8.2-8.7, the oxidation step is performed in an alkaline solution containing hydrogen peroxide and a hydrogen peroxide catalyst, the acid neutralization step is performed in an acid environment with a pH value of 4.5-5.5, the reduction step and the whitening step are respectively performed in a solution containing a reduction agent and a solution containing a whitening agent, and the weak oxidation step is performed in a solution containing a small amount of hydrogen peroxide. The present invention further relates to a pure white wool fabric, wherein the pure white wool fabric is prepared according to the low damage bleaching method for the wool fabric. The wool fabric treated by the bleaching method of the present invention has the following characteristics that: whiteness of the wool can be more than 105%, and strength loss rate can be controlled within 30%.
Description
Technical field
The present invention relates to a kind of method for bleaching of wool fabric, relate in particular to the method for bleaching of the low damage of a kind of wool fabric; The invention still further relates to a kind of whiteness at the wool fabric more than 105%.Belong to the dyeing and finishing field.
Background technology
Analyze according to the relevant expert, the depressed of wool market, the world should be attributed to popular colour to a great extent.Fashion's the most prevalent color is white, and natural wool is brown accent, and it is high to dye lily cost compare, and is easy to decolouring.
Up to the present, for making general wool fabric pure white, common single employing hydrogen peroxide oxidation method or sodium hydrosulfite reducing process, the treatment temperature of hydrogen peroxide oxidation method is 60 ℃, the processing time is 4 hours; The treatment temperature of sodium hydrosulfite reducing process is 85 ℃, and the processing time is 2 hours.Although these two kinds of methods have all reached the purpose of bleaching, there are, the defectives such as whiteness not lasting, color easy xanthochromia large to fabric damage in it.Recent years, once the someone had proposed cold rolling heap bleaching, although whiteness also can satisfy the common customer requirement, its production time long (generally wanting 24 hours), production efficiency causes anxiety.
Because wool fibre alkali resistance and heat resistance are relatively poor, therefore, should reach certain whiteness requirement, when protecting again wool powerful, it is particularly important that method for bleaching and process choice seem; This also is one of difficult point of wool fibre dyeing and printing process, the bleaching process that does not up to the present also allow people be satisfied with very much, and this has also limited the wool vast potential for future development to a certain extent.
Summary of the invention
Because the defects of prior art, technical problem to be solved by this invention provides a kind of the assurance under the little prerequisite of wool fabric strength damage, the method that wool fabric is bleached.
For achieving the above object, on the one hand, the invention provides the method for bleaching of the low damage of a kind of wool fabric.
Particularly, the present invention solves above-mentioned technical problem by the following technical programs.
The method for bleaching of the low damage of a kind of wool fabric comprises following operation: in pretreatment procedure, oxidation operation, the acid and operation, reduction operation, brighten operation, weak oxide operation; Described pretreatment procedure carries out in the pretreatment liquid of 8.2-8.7 in the pH value, described oxidation operation carries out in the alkaline solution that contains oxidant, catalyst, carry out in the sour environment of 4.5-5.5 in the pH value with operation in the described acid, described reduction operation is carried out in containing the solution of reductant, the described operation that brightens is carried out in containing the solution of brightening agent, and described weak oxide operation is carried out in containing the solution of a small amount of hydrogen peroxide.
This case inventor finds, will reduce operation with brighten operation with bathing when carrying out, the treatment conditions reduction of each operation both can be able to be obtained desirable whiteness, can not cause excessive damage to wool fabric again.Especially with oxidation operation of the present invention, reduce operation, brighten operation and join together with bathe using its better effects if.
In the specific embodiment of the present invention, preferably, reduction operation of the present invention and brighten operation and in the solution that contains reductant, brightening agent, carry out with bathing.More preferably, brighten operation and reduction operation and in 40-50 ℃ the solution that contains reductant, brightening agent, process 50-80min with bathing.Wherein, the reductant of reduction operation is preferably sodium hydrosulfite or thiourea dioxide, and its consumption is 2-5g in per 1 premium on currency; Brighten that brightening agent is preferably Distyryl benzene fluorescent brighteners in the operation, the consumption of brightening agent is the 0.3-1% of described wool fabric weight.
In preferred embodiments of the present invention, described oxidation operation carries out in the alkaline solution that contains oxidant, catalyst of 9-10 in the pH value.
In another preferred embodiments of the present invention, described oxidation operation is processed 50-80min in 40-50 ℃ alkaline solution.
In the specific embodiment of the present invention, oxidant is preferably hydrogen peroxide or Peracetic acid in the oxidation operation, and catalyst is preferably base catalyst, Zhu Ru Ding Laokawei BAC, soda ash etc.Wherein, the consumption of oxidant is preferably 5-10g in per 1 premium on currency, and the consumption of catalyst is preferably 1-4g in per 1 premium on currency.
Preferably, in oxidation operation of the present invention, reduction operation and brighten and also be added with respectively the art nonionic commonly used or the dyeing assistant of anionic in the operation, such as metal-chelator, bathe in smooth agent etc.Wherein, the consumption of smooth agent is respectively 0.2-0.4g, 1-3g in per 1 premium on currency in metal-chelator, the bath.
In method for bleaching of the present invention, preferably, pretreatment liquid described in the pretreatment procedure is the aqueous solution of degreaser, neutral electrolyte and carbonate or bicarbonate; Wherein, the consumption of described degreaser is 0.5-2g in per 1 premium on currency, and the consumption of neutral electrolyte is the 2-5% of described wool fabric weight, and the consumption of carbonate or bicarbonate is to make the pH value of described pretreatment liquid between 8.2-8.7.Neutral electrolyte is preferably sodium sulphate or sodium chloride, and carbonate is preferably sodium carbonate, and bicarbonate is preferably sodium bicarbonate.
In the present invention, the purpose with operation in the described acid is after finishing oxidation operation, by adding sour agent fabrics cloth cover pH is neutralized.Preferably, carry out in the acid and operation in the pH value in the sour environment of 4.5-5.5.Wherein, sour agent is preferably acetic acid, and its consumption is preferably 1g in per 1 premium on currency.
In the present invention, the purpose of described weak oxide operation is after finishing the reduction operation and brightening operation, removes the reductant that remains on the fabrics cloth cover.Wherein, weak oxidant is preferably hydrogen peroxide, and its consumption is preferably 0.35g in per 1 premium on currency.
The method for bleaching of the low damage of wool fabric of the present invention carries out in dyeing machine, and dyeing machine is preferably overflow dyeing machine or jet dyeing machine.
Degreaser of the present invention is the art reagent commonly used, and this is had no particular limits.
In the present invention, used " water " such as described water, washings all refer to the industrial soft water that this area is commonly used.Wool fabric of the present invention comprise pure wool fabric, wool and other fiber blend or interweave and wool content at the fabric more than 50%.
On the other hand, the present invention also provides a kind of wool fabric, and this wool fabric is to make according to the low method for bleaching that damages of above-mentioned wool fabric, and its whiteness is more than 105%.
The present invention compared with prior art has following advantage:
In the method for the invention, oxidation bleaching, reducing bleach, wool brightened done good combination, wool fabric is hanged down under the prerequisite of damage being subject to, reached desirable whiteness.After testing, the whiteness of the wool fabric that makes through method for bleaching of the present invention can reach more than 105%, and its strength loss rate can be controlled in 30%.On the other hand, the united bleaching of three operations, the bleaching temperature of more single bleaching is low, bleaching time short, has saved the energy, has improved production efficiency.
The specific embodiment
The method for bleaching of the low damage of a kind of wool fabric comprises in pretreatment procedure, oxidation operation, the acid and operation, reduction operation, brightens operation and weak oxide operation, wherein, the reduction operation with brighten operation and carry out with bathing; Each operation is specific as follows:
A) pretreatment procedure: in jet dyeing machine, inject industrial soft water by bath raio 1: 15～20, wool fabric is dropped in the dyeing machine, record height of water level this moment, add degreaser, neutral electrolyte, add carbonate or bicarbonate again and form pretreatment liquid, pretreatment liquid pH value is 8.2-8.7, then be warming up to 40-60 ℃, be incubated discharge opeing after 20-40 minute, 35-45 ℃ of washing once, the water washing bath ratio is 1: 15～20; Wherein, the consumption of degreaser is preferably 0.5-2g in per 1 premium on currency, and the consumption of neutral electrolyte is preferably 2-5% (o.w.f), and the consumption of carbonate or bicarbonate guarantees that the pH value of pretreatment liquid is 8.2-8.7; Neutral electrolyte is preferably sodium sulphate or sodium chloride, and carbonate is preferably sodium carbonate, and bicarbonate is preferably sodium bicarbonate;
B) oxidation operation: the height of water level in the pretreatment procedure is as standard, in dyeing machine, inject industrial soft water, in industrial soft water, add auxiliary agent formation dye liquor successively in the following order: add first smooth agent in metal-chelator, the bath, then add catalyst, oxidant, pH is that then the pH value is warming up to industrial soft water 40-50 ℃ of insulation 50-80min, discharge opeing for 9-10; Wherein, the smooth agent consumption is preferably respectively 0.2-0.4g, 1-3g in per 1 premium on currency in metal-chelator, the bath; Catalyst is preferably Ding Laokawei BAC or soda ash, and its consumption is preferably 1-4g in per 1 premium on currency; Oxidant is preferably hydrogen peroxide, and its consumption is preferably 1-4g in per 1 premium on currency;
C) in the acid and operation: the height of water level in the pretreatment procedure injects industrial soft water as standard in dyeing machine, add sour agent in industrial soft water, and industrial soft water is warming up to 40 ℃ and be incubated 5-10min, discharge opeing; Wherein, sour agent is preferably acetic acid, and its consumption is preferably 1g in per 1 premium on currency.
D) the reduction operation with brighten operation: the height of water level in the pretreatment procedure is as standard, in dyeing machine, inject industrial soft water, in industrial soft water, add auxiliary agent formation dye liquor successively in the following order: add first smooth agent in metal-chelator, the bath, then add reductant, brightening agent, industrial soft water is warming up to 40-50 ℃ of insulation 50-80min, discharge opeing; Wherein, the consumption of smooth agent is preferably respectively 0.2-0.4g, 1-3g in per 1 premium on currency in metal-chelator, the bath; Reductant is preferably sodium hydrosulfite or thiourea dioxide, and its consumption is preferably 2-5g in per 1 premium on currency, and brightening agent is preferably Distyryl benzene fluorescent brighteners, and its consumption is preferably 0.3-1% (o.w.f).
E) weak oxide operation: the height of water level in the pretreatment procedure injects industrial soft water as standard in dyeing machine, add oxidant in industrial soft water, and industrial soft water is warming up to 40 ℃ of insulation 5-10min, discharge opeing; Wherein, oxidant is preferably hydrogen peroxide, and its consumption is preferably 0.35g in per 1 premium on currency.
In an embodiment of the present invention, degreaser is wool degreaser JT, and Guangdong Demei Fine Chemical Co., Ltd. produces; Catalyst is Ding Laokawei BAC, is produced by U.S. Hensel Man; Metal-chelator YH-56 is produced by Shanghai Wu Liang new material technology Co., Ltd; Precious C moistens basic textile material Co., Ltd by Shanghai and produces in the bath; Brightening agent NFW is produced by U.S. Hensel Man.
The method of testing of wool brute force is carried out according to the ISO12947-2-1998 standard among the embodiment, and the whiteness test method is according to the Datacolor650 reading.
Embodiment 1
Wool fabric in the present embodiment is a kind of wool undershirt cloth with spandex, the 72N/1 that is specially Shanghai Jialinjie Textile Co., Ltd's product raises sub-non-shrinkable wool (compact spinning 18.9 fineness)+20D low form LYCRA (Lycra)+entirely and serves as a contrast spandex undershirt cloth, and grammes per square metre is 140g/m
2, fabric width is 150cm, and weight is 20 kilograms, and wool content is 95.6%.
In jet dyeing machine, the method that this wool fabric is bleached comprises following operation:
A) pretreatment procedure: in jet dyeing machine, inject industrial soft water at 1: 15 by bath raio, this wool fabric is dropped in the jet dyeing machine, and record height of water level this moment adds degreaser JT, sodium sulphate, degreaser JT consumption is per 1 premium on currency 2g, and the consumption of sodium sulphate is 3% (o.w.f); Add sodium carbonate 0.8% (o.w.f) again and form pretreatment liquid, recording pretreatment liquid pH value is 8.5, then is warming up to 60 ℃, is incubated 20 minutes, discharge opeing, 40 ℃ of washings once, the water washing bath ratio is 1: 15;
B) oxidation operation: the height of water level in the pretreatment procedure is as standard, in jet dyeing machine, inject industrial soft water, in industrial soft water, add auxiliary agent formation dye liquor successively in the following order: add first precious C in metal-chelator YH-56, the bath, then add catalyst Ding Laokawei BAC, hydrogen peroxide, wherein, precious C, catalyst B AC, hydrogen peroxide consumption are respectively 0.4g, 1g, 2g, 1g in per 1 premium on currency in metal-chelator YH-56, the bath; Then industrial soft water is warming up to 45 ℃, is incubated 60 minutes, discharge opeing, 50 ℃ of hot water wash once, the bath raio of hot water wash is 1: 15;
C) in the acid and operation: the height of water level in the pretreatment procedure injects industrial soft water, and add acetic acid in industrial soft water as standard in jet dyeing machine, its consumption is 1g in per 1 premium on currency, then is warming up to 40 ℃, is incubated discharge opeing after 10 minutes;
D) the reduction operation with brighten operation: the height of water level in the pretreatment procedure is as standard, in jet dyeing machine, inject industrial soft water, in industrial soft water, add auxiliary agent formation dye liquor successively in the following order: add first metal-chelator YH-56, precious C in the bath, powder then takes a policy, fluorescent whitening agent NFW, wherein, metal-chelator YH-56, precious C in the bath, the consumption of sodium hydrosulfite is respectively 0.4g in per 1 premium on currency, 1g, 2g, the consumption of fluorescent whitening agent NFW is 0.8% (o.w.f), industrial soft water is warming up to 50 ℃, be incubated 60 minutes, discharge opeing, 50 ℃ of hot water wash once, the bath raio of hot water wash is 1: 15;
E) weak oxide operation: the height of water level in the pretreatment procedure is as standard, inject industrial soft water in jet dyeing machine, add hydrogen peroxide in industrial soft water, its consumption is 0.35g in 1 premium on currency, industrial soft water is warming up to 40 ℃ of insulation 10min, discharge opeing.
To process the wool fabric that obtains through method for bleaching and carry out the test of wool brute force, its test result is as shown in table 1.The whiteness height of resulting wool fabric is 110.9%; Compare with Comparative Examples 1, its strength loss rate reduces by 25%.
The result of table 1: embodiment 1 shows
| The strength loss rate | Whiteness | |
| Embodiment 1 | 25％ | 110.9％ |
| Comparative Examples 1 | 50％ | 52％ |
Comparative Examples 1
Comparative Examples adopts this area single hydrogen peroxide oxidation method commonly used, to embodiment 1 in identical wool fabric raw material carry out bleaching.
Oxidation operation: to jet dyeing machine in inject industrial soft water at 1: 15 by bath raio, this wool fabric is dropped in the jet dyeing machine, record height of water level this moment, add successively sodium carbonate, hydrogen peroxide, its consumption is respectively per 1 premium on currency 3g, 15g, is warming up to 60 ℃, be incubated 4 hours, discharge opeing, 40 ℃ of washings once, the water washing bath ratio is 1: 15.
To carry out the test of wool brute force through the wool fabric that the hydrogen peroxide oxidation operation was processed, its test result is as shown in table 1.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that this area need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all those skilled in the art all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. the method for bleaching of the low damage of a wool fabric comprises following operation: in pretreatment procedure, oxidation operation, the acid and operation, reduction operation, brighten operation, weak oxide operation; It is characterized in that,
Described pretreatment procedure carries out in the pretreatment liquid of 8.2-8.7 in the pH value, described oxidation operation carries out in the alkaline solution that contains oxidant, catalyst, carry out in the acid solution of 4.5-5.5 in the pH value with operation in the described acid, described reduction operation is carried out in containing the solution of reductant, the described operation that brightens is carried out in containing the solution of brightening agent, and described weak oxide operation is carried out in containing the solution of hydrogen peroxide.
2. the method for bleaching of the low damage of wool fabric as claimed in claim 1 is characterized in that, described reduction operation and the described operation that brightens are carried out with bathing in the solution that contains described reductant and brightening agent.
3. the method for bleaching of the low damage of wool fabric according to claim 2 is characterized in that, described oxidation operation is to carry out in the alkaline solution that contains oxidant, catalyst of 9-10 in the pH value.
4. the method for bleaching of the low damage of wool fabric according to claim 2 is characterized in that,
Oxidant is hydrogen peroxide or Peracetic acid in the described oxidation operation, and catalyst is base catalyst; The consumption of described oxidant is 5-10g in per 1 premium on currency, and the consumption of described catalyst is 1-4g in per 1 premium on currency;
Reductant is sodium hydrosulfite or thiourea dioxide in the described reduction operation, and the consumption of described reductant is 2-5g in per 1 premium on currency;
Describedly brighten that brightening agent is Distyryl benzene fluorescent brighteners in the operation, the consumption of described brightening agent is the 0.3-1% of described wool fabric weight;
The consumption of hydrogen peroxide is 0.35g in per 1 premium on currency in the described weak oxide operation.
5. the method for bleaching of the low damage of wool fabric as claimed in claim 2 is characterized in that, the described operation that brightens is processed 50-80min with the reduction operation in 40-50 ℃ described alkaline solution.
6. wool fabric as claimed in claim 2 hangs down the method for bleaching of damage, it is characterized in that, described oxidation operation, reduction operation and brighten also be added with respectively metal-chelator in the operation, bathe in smooth agent, described metal-chelator, bathe in the consumption of smooth agent be respectively 0.2-0.4g, 1-3g in per 1 premium on currency.
7. the method for bleaching of the low damage of wool fabric as claimed in claim 2 is characterized in that pretreatment liquid is the aqueous solution of degreaser, neutral electrolyte and carbonate or bicarbonate in the described pretreatment procedure; The consumption of described degreaser is 0.5-2g in per 1 premium on currency; Described neutral electrolyte is sodium sulphate or sodium chloride, and described neutral electrolyte consumption is the 2-5% of described wool fabric weight; Described carbonate is sodium carbonate, and bicarbonate is sodium bicarbonate, and the consumption of described carbonate or bicarbonate is to make the pH value of described pretreatment liquid between 8.2-8.7.
8. the method for bleaching of the low damage of wool fabric as claimed in claim 2 is characterized in that, described wool fabric comprise pure wool fabric, wool and other fiber blend or interweave and wool content at the fabric more than 50%.
9. the method for bleaching of the low damage of wool fabric as claimed in claim 3 is characterized in that described oxidation operation is processed 50-80min in 40-50 ℃ described alkaline solution.
10. a whiteness is characterized in that at the wool fabric more than 105%, and one of according to claim 1-9 the method for bleaching of the low damage of described wool fabric makes.
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| CN105040397A (en) * | 2015-04-02 | 2015-11-11 | 宁夏中银绒业股份有限公司 | Improved grey cashmere decoloring method |
| CN105040398A (en) * | 2015-04-02 | 2015-11-11 | 宁夏中银绒业股份有限公司 | Improved cashmere oxidation bleaching method |
| CN105040400A (en) * | 2015-04-02 | 2015-11-11 | 宁夏中银绒业股份有限公司 | Improved cashmere oxidation-reduction bleaching method |
| CN105088741A (en) * | 2015-08-13 | 2015-11-25 | 上海嘉麟杰纺织品股份有限公司 | Method for processing white cotton and wool blended fabric |
| CN109023911A (en) * | 2018-09-13 | 2018-12-18 | 许昌市建安区东和畜牧养殖专业合作社 | The low damage wool of one kind tentatively cleans bleaching process |
| CN109056303A (en) * | 2018-07-02 | 2018-12-21 | 汪涛 | A kind of color inhibition cold bleaching technique of cashmere |
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| CN104328696B (en) * | 2014-10-30 | 2016-04-27 | 上海嘉麟杰纺织品股份有限公司 | A kind of processing method of white hair/Cationic Dyeable Pet fabric |
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| CN109056303A (en) * | 2018-07-02 | 2018-12-21 | 汪涛 | A kind of color inhibition cold bleaching technique of cashmere |
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