CN105040398A - Improved cashmere oxidation bleaching method - Google Patents
Improved cashmere oxidation bleaching method Download PDFInfo
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- CN105040398A CN105040398A CN201510155014.5A CN201510155014A CN105040398A CN 105040398 A CN105040398 A CN 105040398A CN 201510155014 A CN201510155014 A CN 201510155014A CN 105040398 A CN105040398 A CN 105040398A
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Abstract
The invention discloses an improved cashmere oxidation bleaching method which includes the following steps: performing acidic pre-treatment to cashmere, washing the cashmere in water, performing primary oxidation bleaching, smoke-steaming the cashmere, air-drying the cashmere, performing secondary oxidation bleaching and finally washing the cashmere in water for the second time. The invention solves the defects in the prior art and is improved in protective effects on cashmere on the basis of the oxidation bleaching.
Description
Technical field
The present invention relates to lint decolouring technology field, especially a kind of cashmere oxygen bleaching method of improvement.
Background technology
In prior art, the bleaching method of cashmere is mainly divided into oxidation bleaching and reducing bleach two kinds.Oxidation bleaching can obtain the cashmere of high whiteness, and reducing bleach is better for the protected effect of cashmere.In order to the advantage of these two kinds of method for bleaching comprehensive, in prior art, there is the method that redox is bleached.But, the method for redox bleaching from single index contrast, effective all not as independent oxidation bleaching or reducing bleach.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cashmere oxygen bleaching method of improvement, can solve the deficiencies in the prior art, on the basis of oxidation bleaching, improves the protected effect for cashmere.
A cashmere oxygen bleaching method for improvement, step is as follows:
A, preliminary treatment
Put into by cashmere and manage liquid in advance, soak 15min ~ 30min, the temperature of pretreatment fluid remains on 45 DEG C ~ 50 DEG C, and pH value remains on 4 ~ 5,
The composition of pretreatment fluid comprises:
5wt% ~ 8wt% protects suede agent, the sodium chloride of 5wt% ~ 10wt%, the acetone of 2.5wt% ~ 4wt%, the DMG of 0.75wt% ~ 1.5wt%, 4,4' of 1.5wt% ~ 3wt%, 4, and "-trifluoro triphenylcarbinol, all the other are acetum;
B, first time washing
Use deionized water to rinse cashmere, temperature and the pretreatment fluid of deionized water are consistent;
C, for the first time oxidation bleaching
Cashmere is put into the first time oxidation bleaching treatment fluid of flowing, stir 3h ~ 4h, mixing speed is 30rad/min ~ 50rad/min, and the temperature of oxidation bleaching treatment fluid is at 85 DEG C ~ 90 DEG C for the first time, pH value is 9 ~ 10, and the renewal rate of oxidation bleaching treatment fluid is 2%/min for the first time;
Freshly prepd first time, the composition of oxidation bleaching treatment fluid comprised:
The pentadecanoic acid ethyl ester of the hydrogen peroxide of 15wt% ~ 18wt%, the oxidation stabilizers of 1.5wt% ~ 3wt%, 3wt% ~ 4wt%, the sodium decyl sulfate of 3.5wt% ~ 4wt%, 3 of 0.5wt% ~ 1wt%, the chloro-beta-nitrostyrene of 4-bis-, surplus is the mixed solution of NaOH and sodium carbonate, and the mass ratio of NaOH and sodium carbonate is 4:1;
D, stifling
Use steam to fumigate 2h ~ 3h in the cashmere being soaked with the first oxidation bleaching treatment fluid, the temperature of steam remains on 220 DEG C ~ 250 DEG C, and pressure remains on 2.5bar ~ 3bar;
E, air-dry
Cashmere after stifling is placed in room temperature environment air-dry;
F, second time oxidation bleaching
Be reentered in second time oxidation bleaching treatment fluid by cashmere after air-dry, stir 7h ~ 10h, mixing speed is 60rad/min ~ 80rad/min, and the temperature of second time oxidation bleaching treatment fluid remains on 35 DEG C ~ 45 DEG C;
The composition of second time oxidation bleaching treatment fluid also comprises:
The calcium hypochlorite of 2.5wt% ~ 5wt%, the SODIUM PERCARBONATE of 5wt% ~ 7wt%, the oxidation stabilizers of 3wt% ~ 5wt%, the N of 0.2wt% ~ 0.5wt%, the acetone of its azoles quinoline phosphate of the peace of accelerine, 1.5wt% ~ 2wt%, 8wt% ~ 10wt%, surplus is ammoniacal liquor, and the concentration of ammoniacal liquor is 15%;
G, second time washing
Use deionized water to rinse cashmere, the temperature of deionized water is 25 DEG C.
As a preferred technical solution of the present invention, in step C, described oxidation stabilizers is sodium metasilicate.
As a preferred technical solution of the present invention, in step F, described oxidation stabilizers is polyacrylamide.
The beneficial effect adopting technique scheme to bring is: the concrete steps that present invention improves over oxidation bleaching in prior art, by carrying out preliminary treatment before bleaching, separating treatment is carried out to the pigment of cashmere inside, then by twice oxidation bleaching, bleaching is carried out to cashmere.First time bleaching adopts the mode of high-temperature bleaching, carries out bleaching to the pigment molecular that cashmere contains.Because high temperature has decomposition facilitation for hydrogen peroxide, so use the treatment fluid of flowing to bleach in this step, the active ingredient for the treatment of fluid can be kept to remain in a rational scope on the one hand, ensure carrying out smoothly of bleaching.After carrying out first time bleaching, further separated out by the stifling pigment molecular that cashmere top layer is residual, then thoroughly removed by second time bleaching.Second time bleaching adopts the mode of cold bleaching, effectively maintains pliability and the abrasion resistance of cashmere while removing residual pigment.
Detailed description of the invention
A cashmere oxygen bleaching method for improvement, step is as follows:
A, preliminary treatment
Put into by cashmere and manage liquid in advance, soak 30min, the temperature of pretreatment fluid remains on 48 DEG C, and pH value remains on 5,
The composition of pretreatment fluid comprises:
7wt% protects suede agent, the sodium chloride of 5.5wt%, the acetone of 3.8wt%, the DMG of 1.2wt%, 4,4' of 2.8wt%, 4, and "-trifluoro triphenylcarbinol, all the other are acetum;
B, first time washing
Use deionized water to rinse cashmere, temperature and the pretreatment fluid of deionized water are consistent;
C, for the first time oxidation bleaching
Cashmere is put into the first time oxidation bleaching treatment fluid of flowing, stir 3h, mixing speed is 30rad/min, and the temperature of oxidation bleaching treatment fluid is at 87 DEG C for the first time, and pH value is 10, and the renewal rate of oxidation bleaching treatment fluid is 2%/min for the first time;
Freshly prepd first time, the composition of oxidation bleaching treatment fluid comprised:
The pentadecanoic acid ethyl ester of the hydrogen peroxide of 17wt%, the oxidation stabilizers of 2.5wt%, 3.7wt%, the sodium decyl sulfate of 4wt%, 3 of 0.6wt%, the chloro-beta-nitrostyrene of 4-bis-, surplus is the mixed solution of NaOH and sodium carbonate, and the mass ratio of NaOH and sodium carbonate is 4:1;
D, stifling
Use steam to fumigate 3h in the cashmere being soaked with the first oxidation bleaching treatment fluid, the temperature of steam remains on 225 DEG C, and pressure remains on 3bar;
E, air-dry
Cashmere after stifling is placed in room temperature environment air-dry;
F, second time oxidation bleaching
Be reentered in second time oxidation bleaching treatment fluid by cashmere after air-dry, stir 9.5h, mixing speed is 60rad/min, and the temperature of second time oxidation bleaching treatment fluid remains on 36 DEG C;
The composition of second time oxidation bleaching treatment fluid also comprises:
The acetone of its azoles quinoline phosphate of the peace of the oxidation stabilizers of the calcium hypochlorite of 2.6wt%, the SODIUM PERCARBONATE of 6.2wt%, 4.8wt%, the DMA of 0.35wt%, 1.9wt%, 10wt%, surplus is ammoniacal liquor, and the concentration of ammoniacal liquor is 15%;
G, second time washing
Use deionized water to rinse cashmere, the temperature of deionized water is 25 DEG C.
Wherein, in steps A, protect the WQ series wool protective agent of suede agent buying from Wo Sen Chemical Co., Ltd. of Taixing City; In step C, described oxidation stabilizers is sodium metasilicate; In step F, described oxidation stabilizers is polyacrylamide.
In the experimental study process of inventor, inventor finds in second time oxidation bleaching process, adds the 2-thenyl mercaptan of 2wt% ~ 3wt%, effectively can improve the pliability after cashmere bleaching.
The technical scheme that the patent using prior art and background technology to quote provides carries out 20 bleaching test contrasts respectively, and average result is as shown in the table:
As can be seen from experimental result, method for bleaching provided by the invention obtains good whiteness, glossiness and wear-resisting rate after cashmere can be made to bleach.
Foregoing description only proposes, not as the single restrictive condition to its technical scheme itself as the enforceable technical scheme of the present invention.
Claims (3)
1. the cashmere oxygen bleaching method improved, is characterized in that step is as follows:
A, preliminary treatment
Put into by cashmere and manage liquid in advance, soak 15min ~ 30min, the temperature of pretreatment fluid remains on 45 DEG C ~ 50 DEG C, and pH value remains on 4 ~ 5,
The composition of pretreatment fluid comprises:
5wt% ~ 8wt% protects suede agent, the sodium chloride of 5wt% ~ 10wt%, the acetone of 2.5wt% ~ 4wt%, the DMG of 0.75wt% ~ 1.5wt%, 4,4' of 1.5wt% ~ 3wt%, 4 "-trifluoro triphenylcarbinol, all the other are acetum;
B, first time washing
Use deionized water to rinse cashmere, temperature and the pretreatment fluid of deionized water are consistent;
C, for the first time oxidation bleaching
Cashmere is put into the first time oxidation bleaching treatment fluid of flowing, stir 3h ~ 4h, mixing speed is 30rad/min ~ 50rad/min, and the temperature of oxidation bleaching treatment fluid is at 85 DEG C ~ 90 DEG C for the first time, pH value is 9 ~ 10, and the renewal rate of oxidation bleaching treatment fluid is 2%/min for the first time;
Freshly prepd first time, the composition of oxidation bleaching treatment fluid comprised:
The pentadecanoic acid ethyl ester of the hydrogen peroxide of 15wt% ~ 18wt%, the oxidation stabilizers of 1.5wt% ~ 3wt%, 3wt% ~ 4wt%, the sodium decyl sulfate of 3.5wt% ~ 4wt%, 3 of 0.5wt% ~ 1wt%, the chloro-beta-nitrostyrene of 4-bis-, surplus is the mixed solution of NaOH and sodium carbonate, and the mass ratio of NaOH and sodium carbonate is 4:1;
D, stifling
Use steam to fumigate 2h ~ 3h in the cashmere being soaked with the first oxidation bleaching treatment fluid, the temperature of steam remains on 220 DEG C ~ 250 DEG C, and pressure remains on 2.5bar ~ 3bar;
E, air-dry
Cashmere after stifling is placed in room temperature environment air-dry;
F, second time oxidation bleaching
Be reentered in second time oxidation bleaching treatment fluid by cashmere after air-dry, stir 7h ~ 10h, mixing speed is 60rad/min ~ 80rad/min, and the temperature of second time oxidation bleaching treatment fluid remains on 35 DEG C ~ 45 DEG C;
The composition of second time oxidation bleaching treatment fluid also comprises:
The calcium hypochlorite of 2.5wt% ~ 5wt%, the SODIUM PERCARBONATE of 5wt% ~ 7wt%, the oxidation stabilizers of 3wt% ~ 5wt%, the N of 0.2wt% ~ 0.5wt%, the acetone of its azoles quinoline phosphate of the peace of accelerine, 1.5wt% ~ 2wt%, 8wt% ~ 10wt%, surplus is ammoniacal liquor, and the concentration of ammoniacal liquor is 15%;
G, second time washing
Use deionized water to rinse cashmere, the temperature of deionized water is 25 DEG C.
2. the cashmere oxygen bleaching method of improvement according to claim 1, is characterized in that: in step C, and described oxidation stabilizers is sodium metasilicate.
3. the cashmere oxygen bleaching method of improvement according to claim 1, is characterized in that: in step F, and described oxidation stabilizers is polyacrylamide.
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| CN201510155014.5A CN105040398A (en) | 2015-04-02 | 2015-04-02 | Improved cashmere oxidation bleaching method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109056303A (en) * | 2018-07-02 | 2018-12-21 | 汪涛 | A kind of color inhibition cold bleaching technique of cashmere |
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| US5103522A (en) * | 1989-01-19 | 1992-04-14 | The United States Of America As Represented By The Secretary Of Agriculture | Sequential oxidative and reductive bleaching in a multicomponent single liquor system |
| CN102720052A (en) * | 2012-07-02 | 2012-10-10 | 北京泛博化学股份有限公司 | Method for bleaching black feathers and adopted bleaching agent, bleaching auxiliary and bleacher |
| CN102851936A (en) * | 2012-09-03 | 2013-01-02 | 上海嘉麟杰纺织品股份有限公司 | Low damage bleaching method for wool fabric, and pure white wool fabric |
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| CN103243542A (en) * | 2013-05-27 | 2013-08-14 | 宁夏荣昌绒业集团有限公司 | Method for bleaching cashmere loose fiber |
| CN104047156A (en) * | 2014-06-30 | 2014-09-17 | 滁州惠智科技服务有限公司 | Low-temperature cashmere bleaching agent and bleaching method thereof |
| CN104294577A (en) * | 2013-07-16 | 2015-01-21 | 威海市锐达羽毛制品有限公司 | A bleaching method of colored badminton ball feathers |
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2015
- 2015-04-02 CN CN201510155014.5A patent/CN105040398A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4961752A (en) * | 1989-01-19 | 1990-10-09 | The United States Of America As Represented By The Scretary Of Agriculture | Sequential oxidative and reductive bleaching in a multicomponent single liquor system |
| US5103522A (en) * | 1989-01-19 | 1992-04-14 | The United States Of America As Represented By The Secretary Of Agriculture | Sequential oxidative and reductive bleaching in a multicomponent single liquor system |
| CN102720052A (en) * | 2012-07-02 | 2012-10-10 | 北京泛博化学股份有限公司 | Method for bleaching black feathers and adopted bleaching agent, bleaching auxiliary and bleacher |
| CN102851936A (en) * | 2012-09-03 | 2013-01-02 | 上海嘉麟杰纺织品股份有限公司 | Low damage bleaching method for wool fabric, and pure white wool fabric |
| CN103243543A (en) * | 2013-05-27 | 2013-08-14 | 宁夏荣昌绒业集团有限公司 | Decoloration method of colored cashmere loose fiber |
| CN103243542A (en) * | 2013-05-27 | 2013-08-14 | 宁夏荣昌绒业集团有限公司 | Method for bleaching cashmere loose fiber |
| CN104294577A (en) * | 2013-07-16 | 2015-01-21 | 威海市锐达羽毛制品有限公司 | A bleaching method of colored badminton ball feathers |
| CN104047156A (en) * | 2014-06-30 | 2014-09-17 | 滁州惠智科技服务有限公司 | Low-temperature cashmere bleaching agent and bleaching method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109056303A (en) * | 2018-07-02 | 2018-12-21 | 汪涛 | A kind of color inhibition cold bleaching technique of cashmere |
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Application publication date: 20151111 |