CN105040397A - Improved grey cashmere decoloring method - Google Patents
Improved grey cashmere decoloring method Download PDFInfo
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- CN105040397A CN105040397A CN201510153148.3A CN201510153148A CN105040397A CN 105040397 A CN105040397 A CN 105040397A CN 201510153148 A CN201510153148 A CN 201510153148A CN 105040397 A CN105040397 A CN 105040397A
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Abstract
The invention discloses an improved grey cashmere decoloring method comprising the following steps: (1) enzyme-washing the grey cashmere; (2) performing acidic separation treatment to the surface of the grey cashmere; (3) performing oxidization bleaching to the grey cashmere; (4) performing reduction bleaching to the grey cashmere; and (5) washing the decolored grey cashmere. The invention solves the defects in the prior art and further improves whiteness of decolored grey cashmere.
Description
Technical field
The present invention relates to lint decolouring technology field, especially a kind of blue or green suede discoloration method of improvement.
Background technology
Blue or green suede is the cashmere that a kind of whiteness is only second to white woolenless cloth, blue or green suede itself is cashmere fiber, its length, fineness are the same with white suede, just due to natural ecru, more bright-coloured shallow, middle look dyeing (more gloomy after dyeing) can not be used for, the white suede of cost ratio few per ton more than 10 about ten thousand, therefore, many producers by after the decolouring of blue or green suede when white suede uses, to reach the object of saving white suede consumption and reducing costs.
Chinese invention patent application CN103882722A discloses a kind of discoloration method of blue or green suede, and decolouring cost is low.But by about the whiteness process to 58% of blue or green suede, still a certain distance can only be there is with the whiteness of natural Aries suede more than 80% in this method.Through inventor, the further investigation of this discoloration method is found; the reason that this method cannot obtain higher whiteness is in decolorization; in order to reach the object of the protection to cashmere scale layer; and make between scale layer and cortical layer, to remain the halfway region of a large amount of decolouring, thus have influence on the whiteness of whole cashmere.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of blue or green suede discoloration method of improvement, can solve the deficiencies in the prior art, further increases the whiteness after the decolouring of blue or green suede.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
A, enzyme are washed
Under normal temperature, blue or green suede is put into flock dyeing cylinder and add soft water, bath raio is 1:10 ~ 1:15, and stir, add the nonionic lotion of 1wt% ~ 3wt% and the mercerising protease immersion treatment of 0.1wt% ~ 0.2wt% successively, adjust ph is 8 ~ 9; Be warming up to 40 DEG C ~ 55 DEG C, insulation 15 ~ 25min, emptying, washing;
B, acid separating treatment
Acidic treatment liquid put into by blue or green suede processing of step A crossed, and bath raio is 2:7 ~ 1:10, and water temperature is 50 DEG C ~ 65 DEG C, and stir 0.5h ~ 1h, speed of agitator controls at 60rad/min ~ 100rad/min,
PH value is adjusted to 5 ~ 6 by adding acid solution by acidic treatment liquid, the isopropyl alcohol of acidic treatment liquid also containing 25wt% ~ 30wt%, the 1-METHYLPYRROLIDONE of 3.5wt% ~ 5wt%, the furfuryl acetate of 1.2wt% ~ 1.5wt%, the vinyltoluene of 2.1wt% ~ 3wt%;
C, oxidation bleaching
The blue or green suede of step B process is put into oxidation bleaching solution, and bath raio is 1:5 ~ 1:10, with, the speed of 50 ~ 60rad/min stirs 3h ~ 5h, and the temperature of oxidation bleaching solution is 39 DEG C ~ 43 DEG C;
The composition of oxidation bleaching treatment fluid comprises:
The potassium sulfate of the oxidation stabilizers of the hydrogen peroxide of 30wt% ~ 38wt%, the complexing agent of 5wt% ~ 8wt%, 3.5wt% ~ 5wt%, the 4-hydroxy 3-methoxybenzene ethanol of 1.5wt% ~ 3wt%, 0.55wt% ~ 0.75wt%, surplus is water;
D, rinsing
The rinsing liquid that flowing put into by the blue or green suede of step C process is carried out rinsing, and the flow of rinsing liquid remains on 5 ~ 8L/min, and the temperature of rinsing liquid remains on 35 ~ 40 DEG C;
E, reducing bleach
The blue or green suede of step D process is put into reducing bleach liquid; bath raio is 1:15 ~ 1:18, by adding acid solution, the pH value of reducing bleach liquid being adjusted to 5.5 ~ 6, stirring with the speed of 30 ~ 50rad/min; stir 7h ~ 10h, whipping process maintains the temperature at 40 DEG C ~ 45 DEG C;
The composition of reducing bleach liquid also comprises:
The DMA of the dimethyl suflfate of the sodium hydrosulfite of 3.5wt% ~ 8wt%, the sodium pyrophosphate of 0.75wt% ~ 1.5wt%, 1.7wt% ~ 2wt%, the 6-amino-2-methyl-2-enanthol hydrochloride of 0.5wt% ~ 0.8wt%, 1.2wt% ~ 2wt%;
After stirring, in reducing bleach liquid, add the triphenylphosphine of 4wt% ~ 5wt%, and be heated to 65 DEG C, keep 15min ~ 20min;
F, flushing
The blue or green suede of step e process is put into deionized water and carries out flushing 30 minutes, deionized water temperature is 25 DEG C ~ 30 DEG C, and the circular flow of deionized water is 10 ~ 12m
3/ h.
As a preferred technical solution of the present invention, in step B, described acid solution is oxalic acid.
As a preferred technical solution of the present invention, in step C, described complexing agent is hexamethylene diamine tetramethylene phosphonic acid sylvite.
For a preferred technical solution of the present invention, in step e, described acid solution is acetic acid.
The beneficial effect adopting technique scheme to bring is: present invention improves over blue or green suede discoloration method of the prior art.First; do not re-use ferrous ion; thus avoid the problem that oxidation of divalent iron ion becomes ferric ion, simultaneously also just without the need to adding the additive for the protection of ferrous ion in prior art, decrease the complex residual thing content of damage for blue or green Down Fiber and fiber surface.In order to improve the decolorizing effect in region between scale layer and cortical layer, by acid separating treatment, scale layer and cortical layer can be made to be separated fully and to make the pigment of its inside that preliminary dissociating occur, being convenient to the desolventing technology of subsequent step.Oxidation bleaching step adopts the oxidation bleaching solution of the low bath raio of high concentration, realize the Quick Oxidation of fiber surface, can prevent scale layer and cortical layer from again contacting mutually closed simultaneously, reducing bleach step adopts the reducing bleach liquid of low concentration high bath raio, decomposition and the precipitation of the degree of depth can be carried out to pigment residual in fiber, the triphenylphosphine finally added can realize the solidification again of scale layer and cortical layer, thus improves the durability of fiber itself.
Detailed description of the invention
A cashmere redox method for bleaching for improvement, is characterized in that step is as follows:
A, enzyme are washed
Under normal temperature, blue or green suede is put into flock dyeing cylinder and add soft water, bath raio is 1:11, and stir, add the nonionic lotion of 1.7wt% and the mercerising protease immersion treatment of 0.2wt% successively, adjust ph is 9; Be warming up to 48 DEG C, insulation 20min, emptying, washing;
B, acid separating treatment
Acidic treatment liquid put into by blue or green suede processing of step A crossed, and bath raio is 1:5, and water temperature is 62 DEG C, and stir 1h, speed of agitator controls at 95rad/min,
PH value is adjusted to 5.5 by adding acid solution by acidic treatment liquid, the isopropyl alcohol of acidic treatment liquid also containing 27wt%, the 1-METHYLPYRROLIDONE of 4wt%, the furfuryl acetate of 1.45wt%, the vinyltoluene of 2.22wt%;
C, oxidation bleaching
The blue or green suede of step B process is put into oxidation bleaching solution, and bath raio is 1:9, with, the speed of 60rad/min stirs 4.5h, and the temperature of oxidation bleaching solution is 40 DEG C;
The composition of oxidation bleaching treatment fluid comprises:
The potassium sulfate of the oxidation stabilizers of the hydrogen peroxide of 35wt%, the complexing agent of 5.5wt%, 4wt%, the 4-hydroxy 3-methoxybenzene ethanol of 2.2wt%, 0.7wt%, surplus is water;
D, rinsing
The rinsing liquid that flowing put into by the blue or green suede of step C process is carried out rinsing, and the flow of rinsing liquid remains on 8L/min, and the temperature of rinsing liquid remains on 35 DEG C;
E, reducing bleach
The blue or green suede of step D process is put into reducing bleach liquid, and bath raio is 1:18, by adding acid solution, the pH value of reducing bleach liquid being adjusted to 5.5, stirring with the speed of 50rad/min, and stir 9h, whipping process maintains the temperature at 43 DEG C;
The composition of reducing bleach liquid also comprises:
The DMA of the dimethyl suflfate of the sodium hydrosulfite of 6.5wt%, the sodium pyrophosphate of 1.2wt%, 1.8wt%, the 6-amino-2-methyl-2-enanthol hydrochloride of 0.75wt%, 1.9wt%;
After stirring, in reducing bleach liquid, add the triphenylphosphine of 4.2wt%, and be heated to 65 DEG C, keep 20min;
F, flushing
The blue or green suede of step e process is put into deionized water and carries out flushing 30 minutes, deionized water temperature is 27 DEG C, and the circular flow of deionized water is 12m
3/ h.
Wherein in step B, described acid solution is oxalic acid; In step C, described complexing agent is hexamethylene diamine tetramethylene phosphonic acid sylvite; In step e, described acid solution is acetic acid.In order to obtain experimental result relatively targetedly, the raw materials such as the nonionic lotion that the present embodiment uses, mercerising protease and oxidation stabilizers are all purchased from the producer identical with the patent document that background technology is quoted and model.
In the experimental study process of inventor, inventor finds in the end to carry out in dry run to blue or green suede, and front three basic ring three boroxane a small amount of to its surface sprinkling, effectively can prevent the over oxidation of fiber surface, thus keeps the gloss of fiber surface.Spraying dosage is that the blue or green suede of per kilogram sprays 15g ~ 20g front three basic ring three boroxane.
The technical scheme that the patent using said method and background technology to quote provides carries out Decolorant Test contrast, and result is as shown in the table:
| Average whiteness (%) | |
| Prior art | 57 |
| The technical program | 73 |
This average whiteness is the mean value respectively by calculating gained after decolouring to 20 samples.
Find in the further research of inventor, at last rinsing step, if pass into carbon dioxide in ionized water, make water body present faintly acid, finished product can be improved and to decolour the softness of blue or green suede.In order to improve treatment effect, ensure that the intake of carbon dioxide makes carbon dioxide solubility state in water body close to saturated.
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 (4)
1. the blue or green suede discoloration method improved, is characterized in that step is as follows:
A, enzyme are washed
Under normal temperature, blue or green suede is put into flock dyeing cylinder and add soft water, bath raio is 1:10 ~ 1:15, and stir, add the nonionic lotion of 1wt% ~ 3wt% and the mercerising protease immersion treatment of 0.1wt% ~ 0.2wt% successively, adjust ph is 8 ~ 9; Be warming up to 40 DEG C ~ 55 DEG C, insulation 15 ~ 25min, emptying, washing;
B, acid separating treatment
Acidic treatment liquid put into by blue or green suede processing of step A crossed, and bath raio is 2:7 ~ 1:10, and water temperature is 50 DEG C ~ 65 DEG C, and stir 0.5h ~ 1h, speed of agitator controls at 60rad/min ~ 100rad/min,
PH value is adjusted to 5 ~ 6 by adding acid solution by acidic treatment liquid, the isopropyl alcohol of acidic treatment liquid also containing 25wt% ~ 30wt%, the 1-METHYLPYRROLIDONE of 3.5wt% ~ 5wt%, the furfuryl acetate of 1.2wt% ~ 1.5wt%, the vinyltoluene of 2.1wt% ~ 3wt%;
C, oxidation bleaching
The blue or green suede of step B process is put into oxidation bleaching solution, and bath raio is 1:5 ~ 1:10, with, the speed of 50 ~ 60rad/min stirs 3h ~ 5h, and the temperature of oxidation bleaching solution is 39 DEG C ~ 43 DEG C;
The composition of oxidation bleaching treatment fluid comprises:
The potassium sulfate of the oxidation stabilizers of the hydrogen peroxide of 30wt% ~ 38wt%, the complexing agent of 5wt% ~ 8wt%, 3.5wt% ~ 5wt%, the 4-hydroxy 3-methoxybenzene ethanol of 1.5wt% ~ 3wt%, 0.55wt% ~ 0.75wt%, surplus is water;
D, rinsing
The rinsing liquid that flowing put into by the blue or green suede of step C process is carried out rinsing, and the flow of rinsing liquid remains on 5 ~ 8L/min, and the temperature of rinsing liquid remains on 35 ~ 40 DEG C;
E, reducing bleach
The blue or green suede of step D process is put into reducing bleach liquid; bath raio is 1:15 ~ 1:18, by adding acid solution, the pH value of reducing bleach liquid being adjusted to 5.5 ~ 6, stirring with the speed of 30 ~ 50rad/min; stir 7h ~ 10h, whipping process maintains the temperature at 40 DEG C ~ 45 DEG C;
The composition of reducing bleach liquid also comprises:
The DMA of the dimethyl suflfate of the sodium hydrosulfite of 3.5wt% ~ 8wt%, the sodium pyrophosphate of 0.75wt% ~ 1.5wt%, 1.7wt% ~ 2wt%, the 6-amino-2-methyl-2-enanthol hydrochloride of 0.5wt% ~ 0.8wt%, 1.2wt% ~ 2wt%;
After stirring, in reducing bleach liquid, add the triphenylphosphine of 4wt% ~ 5wt%, and be heated to 65 DEG C, keep 15min ~ 20min;
F, flushing
The blue or green suede of step e process is put into deionized water and carries out flushing 30 minutes, deionized water temperature is 25 DEG C ~ 30 DEG C, and the circular flow of deionized water is 10 ~ 12m
3/ h.
2. the blue or green suede discoloration method of improvement according to claim 1, is characterized in that: in step B, and described acid solution is oxalic acid.
3. the blue or green suede discoloration method of improvement according to claim 1, is characterized in that: in step C, and described complexing agent is hexamethylene diamine tetramethylene phosphonic acid sylvite.
4. the blue or green suede discoloration method of improvement according to claim 1, is characterized in that: in step e, and described acid solution is acetic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510153148.3A CN105040397A (en) | 2015-04-02 | 2015-04-02 | Improved grey cashmere decoloring method |
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|---|---|---|---|
| CN201510153148.3A CN105040397A (en) | 2015-04-02 | 2015-04-02 | Improved grey cashmere decoloring method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908310A (en) * | 2016-06-30 | 2016-08-31 | 江苏华信亚麻纺织有限公司 | Wet spinning process method for blending bamboo carbon fiber and flax |
| CN106758127A (en) * | 2016-11-17 | 2017-05-31 | 无锡奔牛生物科技有限公司 | One discoloration method for growing cotton |
| CN107059385A (en) * | 2017-04-17 | 2017-08-18 | 武汉纺织大学 | It is a kind of to improve the discoloration method of coloured suede strength |
| CN108085958A (en) * | 2017-12-07 | 2018-05-29 | 桐乡市东企纤维整理有限公司 | A kind of cashmere is stripped technique |
| CN108570849A (en) * | 2018-04-03 | 2018-09-25 | 南通大学 | A kind of novel bleached hair method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908310A (en) * | 2016-06-30 | 2016-08-31 | 江苏华信亚麻纺织有限公司 | Wet spinning process method for blending bamboo carbon fiber and flax |
| CN106758127A (en) * | 2016-11-17 | 2017-05-31 | 无锡奔牛生物科技有限公司 | One discoloration method for growing cotton |
| CN107059385A (en) * | 2017-04-17 | 2017-08-18 | 武汉纺织大学 | It is a kind of to improve the discoloration method of coloured suede strength |
| CN107059385B (en) * | 2017-04-17 | 2021-10-26 | 武汉纺织大学 | Decoloring method for improving strength of colored velvet |
| CN108085958A (en) * | 2017-12-07 | 2018-05-29 | 桐乡市东企纤维整理有限公司 | A kind of cashmere is stripped technique |
| CN108570849A (en) * | 2018-04-03 | 2018-09-25 | 南通大学 | A kind of novel bleached hair method |
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