CN103451909A - Cashmere fiber reducing bleaching process - Google Patents
Cashmere fiber reducing bleaching process Download PDFInfo
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- CN103451909A CN103451909A CN2013103883558A CN201310388355A CN103451909A CN 103451909 A CN103451909 A CN 103451909A CN 2013103883558 A CN2013103883558 A CN 2013103883558A CN 201310388355 A CN201310388355 A CN 201310388355A CN 103451909 A CN103451909 A CN 103451909A
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Abstract
The invention discloses a cashmere fiber reducing bleaching process, which comprises the following steps: S1, bleaching cashmere fibers at the bleaching temperature ranging from 60 to 65 DEG C in a solution in which the mass concentration of reducing powder to the cashmere fibers is 20% and the bath ratio is 1: 40, for 40 min; and S2, washing the cashmere fibers by using water and drying the cashmere fibers. The cashmere fiber reducing bleaching process provided by the invention is simple, and has low harm on the strength of the cashmere fibers on the basis of guaranteeing the whiteness.
Description
Technical field
The present invention relates to cashmere bleaching technology field, relate in particular to a kind of cashmere fiber reducing bleach technique.
Background technology
Traditional beret is a kind of without the soft standard army cap of eaves, usually used as personnel's sign of detached force, special force and the airborne troop of some national armies.Beret have be convenient to fold, be not afraid of extruding, easily carry, the advantage such as attractive in appearance.Famous high-ranking military officer's marshal Montgomery just often has on beret in World War II, but also has on general and two cap insignias of armored force unusually.Some countries are distinguished the different arm of the services on color.
Cashmere fiber need to carry out bleaching process usually, and can carry out reducing bleach.Cashmere fiber after reducing bleach has its unique style and characteristics, than the coloured light of the product after oxidation bleaching partially green-blue light, and coloured light is soft, is that oxidation bleaching institute is irreplaceable.But reducing bleach is more serious to the strength damage of wool or cashmere fiber, and technology difficulty is larger.
In view of this, for above-mentioned technical problem, be necessary to provide a kind of cashmere fiber reducing bleach technique.
Summary of the invention
Technical problem to be solved by this invention is exactly for above-mentioned deficiency of the prior art, and a kind of cashmere fiber reducing bleach technique is provided.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of cashmere fiber reducing bleach technique, described technique comprises:
S1, at bleaching temperature, be that 60～65 ℃, reduced powder are 20% with respect to the cashmere fiber mass concentration, in the solution that bath raio is 1:40, cashmere fiber bleached, bleaching time is 40min;
S2, cashmere fiber is washed and dried.
Preferably, described reduced powder comprises sodium dithionite.
Preferably, described reduced powder also comprises one or more in complexing agent, buffer.
Preferably, described complexing agent comprises one or more in phosphate, alcamines, aminocarboxylate, hydroxycarboxylate, organic phosphonate, polyacrylic.
Preferably, described buffer is acid-base buffer agent, comprises hydrochlorate or alkali salt.
Preferably, in described step S1, the pH value of solution is 5.5～6.5.
Preferably, in described step S1, the pH value of solution is 6.
Preferably, in described step S1, bleaching temperature is 65 ℃.
The invention has the beneficial effects as follows, cashmere fiber reducing bleach technique of the present invention is simple, on the basis that guarantees whiteness, makes the fiber strength damage less.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
The schematic flow sheet that Fig. 1 is cashmere fiber reducing bleach technique in the present invention's one specific embodiment.
Fig. 2 be in the present invention's one specific embodiment bleaching time to cashmere fiber whiteness and powerful broken line graph.
Fig. 3 is that in the present invention's one specific embodiment, bleaching temperature floats cashmere fiber whiteness and powerful broken line graph.
Fig. 4 be in the present invention's one specific embodiment reduced powder concentration to cashmere fiber whiteness and powerful broken line graph.
The specific embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
The embodiment of the invention discloses a kind of cashmere fiber reducing bleach technique, comprising:
S1, at bleaching temperature, be that 60～65 ℃, reduced powder are 20% with respect to the cashmere fiber mass concentration, in the solution that bath raio is 1:40, cashmere fiber bleached, bleaching time is 40min, and preferably, bleaching temperature is 65 ℃;
S2, cashmere fiber is washed and dried.
Further, reduced powder comprises sodium dithionite.
Further, reduced powder also comprises one or more in complexing agent, buffer.
Further, complexing agent comprises one or more in phosphate, alcamines, aminocarboxylate, hydroxycarboxylate, organic phosphonate, polyacrylic.
Further, buffer is acid-base buffer agent, comprises hydrochlorate or alkali salt.
Further, in step S1, the pH value of solution is 5.5～6.5.
Further, in step S1, the pH value of solution is 6.
In order to make those skilled in the art person understand better the technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Embodiment based in the application, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all should belong to the scope of the application's protection.
Fig. 1 is the schematic flow sheet of cashmere fiber reducing bleach technique in the present invention's one specific embodiment, and it specifically comprises:
S1, at bleaching temperature, be that 60～65 ℃ of (preferably choosing 65 ℃ describes), reduced powders are 20% with respect to the cashmere fiber mass concentration; in the solution that bath raio is 1:40, cashmere fiber is bleached; bleaching time is 40min; preferably; in this step, the pH value of solution is 5.5～6.5; particularly, as the pH value is 6;
S2, cashmere fiber is washed and dried.
Reduced powder is to take the stabilisation reductant that sodium dithionite is main component, containing complexing agent and buffer.Complexing agent comprises one or more in phosphate, alcamines, aminocarboxylate, hydroxycarboxylate, organic phosphonate, polyacrylic; Buffer is acid-base buffer agent, comprises hydrochlorate or alkali salt.
Sodium dithionite can destroy natural colouring matter in cashmere, because the amount of pigment contained in cashmere is certain, when reduced powder concentration amount acquires a certain degree, the cashmere whiteness increases just no longer obvious.Sodium dithionite can be attacked the disulfide bond in the cashmere structure simultaneously, causes the powerful decline of cashmere, and when concentration is excessive, thereby sodium dithionite mainly reacts with disulfide bond and causes the cashmere brute force greatly to descend.
The impact of bleaching time on the cashmere bleaching effect:
Fixing reduced powder consumption 20% (o.w.f.), 60 ℃ of bleaching temperatures, bath raio 1:40, change bleaching time, and to whiteness and the strength test of bleaching rear cashmere, result is as following table 1.
The impact of table 1 bleaching time on bleaching effect
Obtain Fig. 2 by table 1, can find out, along with the growth of bleaching time, the whiteness of floating rear cashmere increases, powerful decline, and when bleaching time is 40min, whiteness improves 18.95%, powerful decline 11%, Exposure to Sunlight stability is 3 grades.Afterwards, along with the increase of bleaching time, the whiteness increase of the rear cashmere of bleaching is not obvious, and powerful decline is serious, and the trend comparison of Exposure to Sunlight stability change is mild, still must trend descend, and the analysis after bleaching time fixes on 40min and is advisable.And, by relatively showing the impact on bleaching effect with respect to Pressure, Concentration, Temperature, the time is not obvious on the bleaching effect impact.
The impact of bleaching temperature on the cashmere bleaching effect:
According to above test, during bleaching time 40min, be suitable bleaching time, determine bleaching time 40min, reduced powder consumption 20% (o.w.f.), bath raio 1:40, change bleaching temperature, looks for the affect rule of temperature on bleaching effect.
The impact of table 2 bleaching temperature on bleaching effect
Obtain Fig. 3 by table 2, can find out,, along with the growth of bleaching temperature, the whiteness of floating rear cashmere increases, powerful decline, Exposure to Sunlight stability decreases.When bleaching temperature reaches 60 ℃, whiteness improves 18.43%, powerful decline 10.01%, and rank 3+ level is stablized in Exposure to Sunlight.When bleaching temperature continues to increase, whiteness increases not obvious, and powerful decline is serious, and the Exposure to Sunlight stability change is little.Consider whiteness and brute force, bleaching temperature is chosen in 65 ℃.
Cashmere belongs to keratin fiber, and outside is coated with hydrophobic scale layer, and when temperature reaches 50 ℃, the scale on cashmere surface just starts to open, and reagent molecule can enter fibrous inside in a large number.But, during excess Temperature, peptide bond will be hydrolyzed, and reduced powder to destroy pigment molecular all will be very violent with reacting of disulfide bond, thereby will have influence on the brute force of fiber.
The impact of reduced powder concentration on bleaching effect:
According to above result of the test, 65 ℃ of bleaching temperatures, bleaching time 40min is suitable bleaching conditions, fixed temperature and time, change the reduced powder consumption, the results are shown in Table 3.
The impact of table 3 reduced powder consumption on bleaching effect
By table 3, with Fig. 4, can be found out, along with increasing of reduced powder concentration, the brute force of cashmere descends gradually, and whiteness increases gradually, and Exposure to Sunlight stability descends gradually.When the reduced powder consumption increases to 20% (o.w.f.), whiteness improves 19.47%, and powerful decline reaches 11%, and Exposure to Sunlight stability is at 3 grades.When concentration continues to increase, whiteness increases not obvious, and when the reduced powder consumption reaches 30% (o.w.f.), the powerful decline of concentration is serious.Consider whiteness with powerful, selective reduction powder concentration is 20% to be advisable.
Consider whiteness and powerful balance, on the basis that guarantees whiteness, make the fiber strength damage less.Can draw the optimised process of reducing bleach cashmere: bleaching temperature is 60～65 ℃, and bleaching time is 40min, and reduced powder concentration is 20% (o.w.f.).
By technique scheme, can be found out, cashmere fiber reducing bleach technique of the present invention is simple, on the basis that guarantees whiteness, makes the fiber strength damage less.
The above-mentioned foundation desirable embodiment of the present invention of take is enlightenment, and by above-mentioned description, the relevant staff can, in the scope that does not depart from this invention technological thought, carry out various change and modification fully.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to the claim scope.
Claims (8)
1. a cashmere fiber reducing bleach technique, is characterized in that, described technique comprises:
S1, at bleaching temperature, be that 60～65 ℃, reduced powder are 20% with respect to the cashmere fiber mass concentration, in the solution that bath raio is 1:40, cashmere fiber bleached, bleaching time is 40min;
S2, cashmere fiber is washed and dried.
2. cashmere fiber reducing bleach technique according to claim 1, is characterized in that, described reduced powder comprises sodium dithionite.
3. cashmere fiber reducing bleach technique according to claim 2, is characterized in that, described reduced powder also comprises one or more in complexing agent, buffer.
4. cashmere fiber reducing bleach technique according to claim 3, is characterized in that, described complexing agent comprises one or more in phosphate, alcamines, aminocarboxylate, hydroxycarboxylate, organic phosphonate, polyacrylic.
5. cashmere fiber reducing bleach technique according to claim 3, is characterized in that, described buffer is acid-base buffer agent, comprises hydrochlorate or alkali salt.
6. cashmere fiber reducing bleach technique according to claim 1, is characterized in that, in described step S1, the pH value of solution is 5.5～6.5.
7. cashmere fiber reducing bleach technique according to claim 1, is characterized in that, in described step S1, the pH value of solution is 6.
8. cashmere fiber reducing bleach technique according to claim 1, is characterized in that, in described step S1, bleaching temperature is 65 ℃.
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| CN2013103883558A CN103451909A (en) | 2013-08-30 | 2013-08-30 | Cashmere fiber reducing bleaching process |
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| CN2013103883558A CN103451909A (en) | 2013-08-30 | 2013-08-30 | Cashmere fiber reducing bleaching process |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (4)
| Title |
|---|
| 和超伟 等: "羊绒还原漂白工艺探讨", 《毛纺科技》 * |
| 和超伟: "蛋白质纤维羊绒与羊毛的漂白工艺研究", 《北京服装学院硕士论文》 * |
| 戴维•M.刘易斯: "《羊毛染色》", 30 November 2010 * |
| 盛冠忠: "模糊正交法用于羊绒还原漂白工艺参数优化", 《毛纺科技》 * |
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Application publication date: 20131218 |