Wool fiber bleaching treatment process adopting one-bath method

Abstract

The invention provides a one-bath wool fiber bleaching treatment process, and relates to the technical field of textile printing and dyeing. The wool fiber bleaching treatment process based on the one-bath process comprises the following steps: S1, wool washing: putting all wool fibers into a bath barrel, injecting a large amount of clear water to enable the clear water to submerge the wool fibers, then adding a detergent containing a surfactant, and washing the wool fibers by an emulsification method; s2, carbonization treatment: placing the cleaned wool fibers in a second bath barrel, injecting a large amount of clear water to enable the clear water to submerge the wool fibers, and then adding a weak acid solution to clean the wool fibers in the bath barrel. The weak acid bleaching activator, the weak acid bleaching buffer agent and the weak oxidizing agent are used for replacing a traditional strong acid agent to bleach the wool fibers, so that the strength and the elongation of the bleached wool fibers are improved instead of obvious damage, and experiments show that the strength of the bleached wool fibers is improved by 3-8%, and the elongation is improved by 5-10%.

Description

Technical Field

[0001] The invention relates to the technical field of textile printing and dyeing, in particular to a one-bath wool fiber bleaching process. Background Art

[0002] As a timeless classic color, white can make people feel its purity and elegance no matter when and where. In recent years, customers have become more and more fond of white clothing and have higher and higher requirements for whiteness. However, due to the yellowing of wool fiber, customers' demand for super white products has been greatly limited.

[0003] In order to improve the whiteness of wool and meet the needs of consumers, the study of wool fabric bleaching is particularly important. However, the traditional bleaching process is generally carried out under the conditions of strong alkalinity and strong oxidants, and then reduced with reducing agents, which will cause serious damage to the strength and elongation of wool fibers. Moreover, the oxidants and reducing agents used in the above process are not easy to clean and will remain on the surface of the wool fibers, resulting in poor fiber whiteness and poor effect. In addition, it takes a long time, consumes a lot of water, and the harmful substances remaining in the wastewater are not conducive to environmental protection. Therefore, a new bleaching process must be developed to replace the traditional process. Summary of the invention

[0004] Technical issues solved In view of the shortcomings of the prior art, the present invention provides a one-bath wool fiber bleaching process, which solves the problems that the oxidant and the reducing agent used in the traditional process are not easy to clean, the wool fiber has poor whiteness, the effect is not good, the water consumption is large, harmful substances remain in the wastewater, and it is not conducive to environmental protection.

[0005] Technical Solution To achieve the above object, the present invention is implemented by the following technical scheme: a one-bath wool fiber bleaching process, comprising the following steps: S1, washing wool, placing all wool fibers in a bathtub, injecting a large amount of clean water to make the clean water cover the wool fibers, and then adding a detergent containing a surfactant to wash the wool fibers by an emulsification method; S2, carbonization treatment, placing the wool fiber after cleaning in a second bathtub, injecting a large amount of clean water to make the clean water cover the wool fiber, then adding a weak acid solution to clean the wool fiber in the bathtub, after cleaning, taking out the wool fiber and placing it in a third bathtub, and then cleaning it again with clean water; S3, enzyme treatment, taking out the carbonized wool fiber and placing it in the fourth bathtub, then injecting a proper amount of clean water to fully mix the wool fiber and the clean water, then adding a proper amount of pepsin and trypsin, and then fully stirring the wool fiber; S4, dehydration, taking out the stirred wool fibers and placing them in a dehydrator for dehydration to remove water stains on the surface of the wool fibers; S5, same bath treatment, then put the dehydrated wool fiber into the fifth bathtub, add appropriate amount of clean water, and add acid bleach activator, acid bleach buffer and weak oxidant at the same time, and then fully stir the wool fiber in the bathtub to make the acid bleach activator, acid bleach buffer and weak oxidant fully mixed with the wool fiber, while maintaining the internal temperature of the bathtub during stirring; S6, deacidification, take out the wool fiber in the fifth bathtub, put it into the sixth bathtub, inject a large amount of clean water, add the reaction enzyme, and wash the wool fiber again; S7, drying the washed wool fibers; S8, post-treatment, collect the water in the second bathtub, the third bathtub, the fourth bathtub, the fifth bathtub and the sixth bathtub, and add reaction enzyme to treat them to meet the emission standards.

[0006] Preferably, the wool fibers need to be rubbed repeatedly during cleaning in S1, and the number of cleaning times is three times.

[0007] Preferably, during cleaning in S2, the wool fibers need to be repeatedly rubbed and left to stand, the rubbing and standing being performed alternately, and the standing time is three times the rubbing time, and the total time is 1 hour.

[0008] Preferably, the stirring time in S3 is 30 min.

[0009] Preferably, the weak acid bleaching activator in S5 is 1-2 g / L, the weak acid bleaching buffer is 2-4 g / L, and the weak oxidant is 25-50 g / L.

[0010] Preferably, the pH value of the reaction bath in S5 is 6-7, the reaction temperature is 70-90° C., and the insulation time is 30-50 min.

[0011] Preferably, the wool fibers need to be rubbed repeatedly during cleaning in S6, and the number of cleaning times is three times.

[0012] Preferably, the dosage of the reaction enzyme in S8 and S6 is 1-2 g / L, the temperature during the treatment in S8 is 30-50° C., and the treatment time is 30-60 min.

[0013] Beneficial Effects The present invention provides a one-bath wool fiber bleaching process, which has the following beneficial effects: 1. Use weak acid bleaching activator, weak acid bleaching buffer and weak oxidant instead of traditional strong acid to bleach wool fibers, so that the strength and elongation of the wool fibers after bleaching will not be significantly damaged but will be improved. According to experiments, the strength after bleaching is increased by 3-8%, and the elongation is increased by 5-10%.

[0014] 2. The weak acid bleaching activator, weak acid bleaching buffer and weak oxidant used in the present invention are all easy-to-handle reagents, which can be completely decomposed into water and oxygen by reaction enzymes, without causing pollution and leaving no residue on the surface of wool fibers.

[0015] 3. The present invention centrally recycles water resources, greatly reducing the waste of water resources. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Embodiment 1: The embodiment of the present invention provides a one-bath wool fiber bleaching process, comprising the following steps: S1, washing wool, placing all wool fibers in a bathtub, injecting a large amount of clean water to make the clean water cover the wool fibers, and then adding a detergent containing a surfactant to wash the wool fibers by an emulsification method; S2, carbonization treatment, placing the wool fiber after cleaning in a second bathtub, injecting a large amount of clean water to make the clean water cover the wool fiber, then adding a weak acid solution to clean the wool fiber in the bathtub, after cleaning, taking out the wool fiber and placing it in a third bathtub, and then cleaning it again with clean water; S3, enzyme treatment, taking out the carbonized wool fiber and placing it in the fourth bathtub, then injecting a proper amount of clean water to fully mix the wool fiber and the clean water, then adding a proper amount of pepsin and trypsin, and then fully stirring the wool fiber; S4, dehydration, taking out the stirred wool fibers and placing them in a dehydrator for dehydration to remove water stains on the surface of the wool fibers; S5, same bath treatment, then put the dehydrated wool fiber into the fifth bathtub, add appropriate amount of clean water, and add acid bleach activator, acid bleach buffer and weak oxidant at the same time, and then fully stir the wool fiber in the bathtub to make the acid bleach activator, acid bleach buffer and weak oxidant fully mixed with the wool fiber, while maintaining the internal temperature of the bathtub during stirring; S6, deacidification, take out the wool fiber in the fifth bathtub, put it into the sixth bathtub, inject a large amount of clean water, add the reaction enzyme, and wash the wool fiber again; S7, drying the washed wool fibers; S8, post-treatment, collect the water in the second bathtub, the third bathtub, the fourth bathtub, the fifth bathtub and the sixth bathtub, and add reaction enzyme to treat them to meet the emission standards.

[0018] During the cleaning in S1, the wool fibers need to be rubbed repeatedly, and the number of cleaning times is three times.

[0019] During cleaning in S2, the wool fibers need to be repeatedly rubbed and left to stand, with rubbing and standing being performed alternately, and the standing time being three times the rubbing time, with a total time of 1 hour.

[0020] The stirring time in S3 is 30 min.

[0021] The weak acid bleaching activator dosage in S5 is 1g / L, the weak acid bleaching buffer is 2g / L; the weak oxidant is 25g / L.

[0022] The pH value of the reaction bath in S5 is 6, the reaction temperature is 70°C, and the insulation time is 30 min.

[0023] When washing in S6, the wool fibers need to be rubbed repeatedly, and the number of washing times is three times.

[0024] The dosage of the reaction enzyme in S8 and S6 was 1 g / L, the temperature during the treatment in S8 was 30° C., and the treatment time was 30 min.

[0025] Embodiment 2: A one-bath wool fiber bleaching process comprises the following steps: S1, washing wool, placing all wool fibers in a bathtub, injecting a large amount of clean water to make the clean water cover the wool fibers, and then adding a detergent containing a surfactant to wash the wool fibers by an emulsification method; S2, carbonization treatment, placing the wool fiber after cleaning in a second bathtub, injecting a large amount of clean water to make the clean water cover the wool fiber, then adding a weak acid solution to clean the wool fiber in the bathtub, after cleaning, taking out the wool fiber and placing it in a third bathtub, and then cleaning it again with clean water; S3, enzyme treatment, taking out the carbonized wool fiber and placing it in the fourth bathtub, then injecting a proper amount of clean water to fully mix the wool fiber and the clean water, then adding a proper amount of pepsin and trypsin, and then fully stirring the wool fiber; S4, dehydration, taking out the stirred wool fibers and placing them in a dehydrator for dehydration to remove water stains on the surface of the wool fibers; S5, same bath treatment, then put the dehydrated wool fiber into the fifth bathtub, add appropriate amount of clean water, and add acid bleach activator, acid bleach buffer and weak oxidant at the same time, and then fully stir the wool fiber in the bathtub to make the acid bleach activator, acid bleach buffer and weak oxidant fully mixed with the wool fiber, while maintaining the internal temperature of the bathtub during stirring; S6, deacidification, take out the wool fiber in the fifth bathtub, put it into the sixth bathtub, inject a large amount of clean water, add the reaction enzyme, and wash the wool fiber again; S7, drying the washed wool fibers; S8, post-treatment, collect the water in the second bathtub, the third bathtub, the fourth bathtub, the fifth bathtub and the sixth bathtub, and add reaction enzyme to treat them to meet the emission standards.

[0026] During the cleaning in S1, the wool fibers need to be rubbed repeatedly, and the number of cleaning times is three times.

[0027] During cleaning in S2, the wool fibers need to be repeatedly rubbed and left to stand, with rubbing and standing being performed alternately, and the standing time being three times the rubbing time, with a total time of 1 hour.

[0028] The stirring time in S3 is 30 min.

[0029] The weak acid bleaching activator dosage in S5 is 1.5g / L, the weak acid bleaching buffer is 3g / L; the weak oxidant is 35g / L.

[0030] The pH value of the reaction bath in S5 is 6, the reaction temperature is 80°C, and the insulation time is 40 minutes.

[0031] When washing in S6, the wool fibers need to be rubbed repeatedly, and the number of washing times is three times.

[0032] The dosage of the reaction enzyme in S8 and S6 was 1.5 g / L, the temperature during the treatment in S8 was 40° C., and the treatment time was 45 min.

[0033] Embodiment three: A one-bath wool fiber bleaching process comprises the following steps: S1, washing wool, placing all wool fibers in a bathtub, injecting a large amount of clean water to make the clean water cover the wool fibers, and then adding a detergent containing a surfactant to wash the wool fibers by an emulsification method; S2, carbonization treatment, placing the wool fiber after cleaning in a second bathtub, injecting a large amount of clean water to make the clean water cover the wool fiber, then adding a weak acid solution to clean the wool fiber in the bathtub, after cleaning, taking out the wool fiber and placing it in a third bathtub, and then cleaning it again with clean water; S3, enzyme treatment, taking out the carbonized wool fiber and placing it in the fourth bathtub, then injecting a proper amount of clean water to fully mix the wool fiber and the clean water, then adding a proper amount of pepsin and trypsin, and then fully stirring the wool fiber; S4, dehydration, taking out the stirred wool fibers and placing them in a dehydrator for dehydration to remove water stains on the surface of the wool fibers; S5, same bath treatment, then put the dehydrated wool fiber into the fifth bathtub, add appropriate amount of clean water, and add acid bleach activator, acid bleach buffer and weak oxidant at the same time, and then fully stir the wool fiber in the bathtub to make the acid bleach activator, acid bleach buffer and weak oxidant fully mixed with the wool fiber, while maintaining the internal temperature of the bathtub during stirring; S6, deacidification, take out the wool fiber in the fifth bathtub, put it into the sixth bathtub, inject a large amount of clean water, add the reaction enzyme, and wash the wool fiber again; S7, drying the washed wool fibers; S8, post-treatment, collect the water in the second bathtub, the third bathtub, the fourth bathtub, the fifth bathtub and the sixth bathtub, and add reaction enzyme to treat them to meet the emission standards.

[0034] During the cleaning in S1, the wool fibers need to be rubbed repeatedly, and the number of cleaning times is three times.

[0035] During cleaning in S2, the wool fibers need to be repeatedly rubbed and left to stand, with rubbing and standing being performed alternately, and the standing time being three times the rubbing time, with a total time of 1 hour.

[0036] The stirring time in S3 is 30 min.

[0037] The weak acid bleaching activator dosage in S5 is 2g / L, the weak acid bleaching buffer is 4g / L; the weak oxidant is 50g / L.

[0038] The pH value of the reaction bath in S5 is 7, the reaction temperature is 80°C, and the insulation time is 40 min.

[0039] When washing in S6, the wool fibers need to be rubbed repeatedly, and the number of washing times is three times.

[0040] The dosage of the reaction enzyme in S8 and S6 was 2 g / L, the temperature during the treatment in S8 was 40° C., and the treatment time was 45 min.

[0041] Embodiment 4: A one-bath wool fiber bleaching process comprises the following steps: S1, washing wool, placing all wool fibers in a bathtub, injecting a large amount of clean water to make the clean water cover the wool fibers, and then adding a detergent containing a surfactant to wash the wool fibers by an emulsification method; S2, carbonization treatment, placing the wool fiber after cleaning in a second bathtub, injecting a large amount of clean water to make the clean water cover the wool fiber, then adding a weak acid solution to clean the wool fiber in the bathtub, after cleaning, taking out the wool fiber and placing it in a third bathtub, and then cleaning it again with clean water; S3, enzyme treatment, taking out the carbonized wool fiber and placing it in the fourth bathtub, then injecting a proper amount of clean water to fully mix the wool fiber and the clean water, then adding a proper amount of pepsin and trypsin, and then fully stirring the wool fiber; S4, dehydration, taking out the stirred wool fibers and placing them in a dehydrator for dehydration to remove water stains on the surface of the wool fibers; S5, same bath treatment, then put the dehydrated wool fiber into the fifth bathtub, add appropriate amount of clean water, and add acid bleach activator, acid bleach buffer and weak oxidant at the same time, and then fully stir the wool fiber in the bathtub to make the acid bleach activator, acid bleach buffer and weak oxidant fully mixed with the wool fiber, while maintaining the internal temperature of the bathtub during stirring; S6, deacidification, take out the wool fiber in the fifth bathtub, put it into the sixth bathtub, inject a large amount of clean water, add the reaction enzyme, and wash the wool fiber again; S7, drying the washed wool fibers; S8, post-treatment, collect the water in the second bathtub, the third bathtub, the fourth bathtub, the fifth bathtub and the sixth bathtub, and add reaction enzyme to treat them to meet the emission standards.

[0042] During the cleaning in S1, the wool fibers need to be rubbed repeatedly, and the number of cleaning times is three times.

[0043] During cleaning in S2, the wool fibers need to be repeatedly rubbed and left to stand, with rubbing and standing being performed alternately, and the standing time being three times the rubbing time, with a total time of 1 hour.

[0044] The stirring time in S3 is 30 min.

[0045] The weak acid bleaching activator dosage in S5 is 2g / L, the weak acid bleaching buffer is 4g / L; the weak oxidant is 50g / L.

[0046] The pH value of the reaction bath in S5 is 7, the reaction temperature is 90°C, and the insulation time is 50 min.

[0047] When washing in S6, the wool fibers need to be rubbed repeatedly, and the number of washing times is three times.

[0048] The dosage of the reaction enzyme in S8 and S6 was 2 g / L, the temperature during the treatment in S8 was 50° C., and the treatment time was 60 min.

[0049] Embodiment five: The difference from the first embodiment, the second embodiment, the third embodiment and the fourth embodiment is that the wool fiber is bleached directly by using the traditional strong alkaline strong oxidant bleaching method.

[0050] The wool fibers were treated in the manners of Example 1, Example 2, Example 3, Example 4 and Example 5, and the surface whiteness of the obtained wool fibers was observed. The strength and elongation of the wool fibers were measured using a measuring instrument, and the surface drug residues were detected. The test results are shown in Table 1: Table 1 From the results in Table 1, it can be seen that the use of Example 1, Example 2, Example 3, and Example 4 can make the surface of the wool fiber white, and the strength and elongation are improved, and the wastewater generated in the production process can be recycled, and under the action of an appropriate amount of reaction enzyme, suitable temperature and reaction time, the drug residues in the wastewater can be eliminated, greatly reducing the waste of water resources.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A one-bath wool fiber bleaching process, characterized in that: The following steps are involved: S1, washing wool, placing all wool fibers in a bathtub, injecting a large amount of clean water to make the clean water cover the wool fibers, and then adding a detergent containing a surfactant to wash the wool fibers by an emulsification method; S2, carbonization treatment, placing the wool fiber after cleaning in a second bathtub, injecting a large amount of clean water to make the clean water cover the wool fiber, then adding a weak acid solution to clean the wool fiber in the bathtub, after cleaning, taking out the wool fiber and placing it in a third bathtub, and then cleaning it again with clean water; S3, enzyme treatment, taking out the carbonized wool fiber and placing it in the fourth bathtub, then injecting a proper amount of clean water to fully mix the wool fiber and the clean water, then adding a proper amount of pepsin and trypsin, and then fully stirring the wool fiber; S4, dehydration, taking out the stirred wool fibers and placing them in a dehydrator for dehydration to remove water stains on the surface of the wool fibers; S5, same bath treatment, then put the dehydrated wool fiber into the fifth bathtub, add appropriate amount of clean water, and add acid bleach activator, acid bleach buffer and weak oxidant at the same time, and then fully stir the wool fiber in the bathtub to make the acid bleach activator, acid bleach buffer and weak oxidant fully mixed with the wool fiber, while maintaining the internal temperature of the bathtub during stirring; S6, deacidification, take out the wool fiber in the fifth bathtub, put it into the sixth bathtub, inject a large amount of clean water, add the reaction enzyme, and wash the wool fiber again; S7, drying the washed wool fibers; S8, post-treatment, collect the water in the second bathtub, the third bathtub, the fourth bathtub, the fifth bathtub and the sixth bathtub, and add reaction enzyme to treat them to meet the emission standards.

2. The one-bath wool fiber bleaching process according to claim 1, characterized in that: During the cleaning in S1, the wool fibers need to be rubbed repeatedly, and the number of cleaning times is three times.

3. The one-bath wool fiber bleaching process according to claim 1, characterized in that: During the cleaning in S2, the wool fibers need to be repeatedly rubbed and left to stand, the rubbing and standing being performed alternately, and the standing time is three times the rubbing time, and the total time is 1 hour.

4. The one-bath wool fiber bleaching process according to claim 1, characterized in that: The stirring time in S3 is 30 min.

5. The one-bath wool fiber bleaching process according to claim 1, characterized in that: The weak acid bleaching activator in S5 is 1-2 g / L, the weak acid bleaching buffer is 2-4 g / L, and the weak oxidant is 25-50 g / L.

6. The one-bath wool fiber bleaching process according to claim 1, characterized in that: The pH value of the reaction bath in S5 is 6-7, the reaction temperature is 70-90° C., and the insulation time is 30-50 min.

7. The one-bath wool fiber bleaching process according to claim 1, characterized in that: During the cleaning in S6, the wool fibers need to be rubbed repeatedly, and the number of cleaning times is three times.

8. The one-bath wool fiber bleaching process according to claim 1, characterized in that: The dosage of the reaction enzyme in S8 and S6 is 1-2 g / L, the temperature during the treatment in S8 is 30-50° C., and the treatment time is 30-60 min.

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