CN111379040A - Dyeing method of lyocell fibers - Google Patents
Dyeing method of lyocell fibers Download PDFInfo
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- CN111379040A CN111379040A CN201811629802.3A CN201811629802A CN111379040A CN 111379040 A CN111379040 A CN 111379040A CN 201811629802 A CN201811629802 A CN 201811629802A CN 111379040 A CN111379040 A CN 111379040A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/06—Dyes
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
Abstract
The invention relates to a dyeing method of lyocell fibers. According to the invention, the plant dye is directly added into the spinning solution of the lyocell fiber, so that the purpose of environmental protection and dye-free is achieved, and the light-resistant color fastness of the plant dye is improved by utilizing the natural light shielding effect and excited state electron quenching effect of the graphene. Meanwhile, lanthanum nitrate or cerium nitrate and the like are used as sources of rare earth ions and are matched with the action of graphene, the plant dye is firmly combined on the edge of a non-crystalline area or even a crystalline area and forms firm multi-element combination with cellulose molecules, and the color fastness and the stability of the natural dye are improved. The invention has obvious effect on improving the color light and the performance, saves the dyeing process, and is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to a preparation method of fibers, and particularly discloses a dyeing method of lyocell fibers.
Background
With the rapid development of science and technology in China, the market consumption trend of consumers on bedding is gradually developing towards health care, and the pursuit of high-quality life is increasingly emphasized. Therefore, a market is opened for novel functional fibers, so that the fibers are rapidly developed in China, the performance of the fibers is continuously improved along with continuous updating and perfection of the production process, and the developed products have larger development space and are favored by consumers.
The lyocell fiber is produced in the middle of the 90's of the 20 th century, and has very high pursuit since the coming out of the world, the lyocell fiber has the characteristics of ① having the characteristics of comfort, excellent hand feeling, easy dyeing, air and moisture permeability and the like of natural cotton fiber, ② having higher dry and wet strength which is far superior to that of the cotton fiber, ③ having good spinnability, being capable of being spun purely and being blended and interwoven with fibers such as cotton, wool, silk, hemp, chemical fiber, cashmere and the like, being suitable for spinning various machines and knitting yarns, and ④ having the environmental protection advantage which is not possessed by the traditional viscose fiber, and being a green fiber which completely meets the requirements of modern consumers.
At present, related enterprises, research institutions and universities at home and abroad relatively study on the aspects of product development, blending, processing technology and the like of related lyocell fibers, but almost do not study and develop other functionalities except the properties of the fibers.
The plant dye is extracted from plants as raw materials and is used for dyeing fabrics. Any plant contains pigments which may be present in the dried bark, rhizome, seed, fruit, flower, leaf, etc. of the plant, respectively. Can be directly or indirectly utilized as 'dye' to dye natural fiber fabrics such as hemp, kudzu, silk, leather, wool, cotton and the like, and the technology is one of the oldest dyeing methods for human beings. Although the application range of the plant dye is wider and the application history is far away in the long printing and dyeing history than that of animal dye and mineral dye, the plant dye has the color fastness problem in the application process, especially the light fastness problem, and is always the technical problem at present.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides the dyeing method of the lyocell fiber, which combines the plant dye with the lyocell fiber spinning solution, improves the light-resistant color fastness of the plant dye through the natural light shielding effect and the excited state electron quenching effect of the graphene, and ensures that the prepared lyocell fiber product has high color strength, good stability, energy conservation and environmental protection.
The invention is realized by the following steps: a dyeing method of lyocell fiber is characterized in that: the method comprises the following steps:
1) preparing a lyocell spinning solution according to mass percent: the lyocell spinning solution comprises 6-16% of cellulose pulp, 84-94% of N-methylmorpholine-N oxide aqueous solution and 0-0.05% of an auxiliary agent;
wherein the cellulose content of the cellulose pulp is 85-97%, and the polymerization degree is 600-1800; the water content of the N-methylmorpholine-N oxide aqueous solution is 85-96%;
2) preparing plant dye slurry: mixing 50-80% of plant dye and 20-50% of water uniformly according to the mass percentage to obtain plant dye slurry;
3) preparing composite color paste: adding 50-200% of graphene relative to the total amount of the plant dye into the plant dye slurry according to the mass percent, mixing, performing ultrasonic dispersion for 1-2 hours, adding 50-100% of rare earth ions relative to the total amount of the plant dye into the slurry according to the mass percent, and uniformly mixing to obtain composite color paste;
4) mixing the composite color paste obtained in the step 3) and the lyocell spinning solution obtained in the step 1) according to the following steps: 0.5-10% of composite color paste and 90-99.5% of lyocell spinning stock solution are mixed and stirred for 1-3 hours, then graphene which accounts for 0.01-1% of the total weight of the lyocell spinning stock solution is added again according to the mass percentage, the mixture is uniformly mixed to obtain the spinning stock solution, and then the spinning is carried out immediately.
In the step 1), the auxiliary agent is in CaCl2One or more of talcum powder, peregal O, glycerol, antioxidant PG, antioxidant TBHQ and antioxidant BHA.
In the step 2), the plant dye is one or more selected from indigo dye, madder dye, safflower dye, sapling dye, Chinese gall dye, dioscorea cirrhosa dye, sappan dye, sophora flower dye, turmeric dye, gardenia dye and phellodendron dye.
The total amount of the graphene added twice in the step 3) and the step 4) is 0.01-2% of the total amount of the cellulose pulp.
In the step 3), the mass ratio of the rare earth ions to the plant dye solution is as follows: 1: 1-2.
The spinning step in the step 4) comprises the following steps:
4.1) spinning: under the spinning condition that the temperature is 80-130 ℃, the spinning stock solution is sprayed out through a spinning nozzle of a spinning nozzle;
4.2) solidification: after the spinning solution is sprayed out through a spinneret, primarily solidifying the sprayed spinning solution by using cold air with the temperature of 5-15 ℃ and the air speed of 5-30 m/s; then directly feeding the spinning solution subjected to primary solidification into a solidification bath for secondary solidification, wherein the solidification temperature is less than or equal to 30 ℃; obtaining solidified fiber;
4.3) water washing: feeding the coagulated fiber into a washing tank through a traction roller to remove residual solvent brought by the coagulation bath, wherein the water used for washing is soft water subjected to impurity removal and soluble metal ion removal, and the washing temperature is 40-80 ℃; after washing, recovering the solvent in the water bath;
4.4) emulsion treatment: washing and drying the solidified fiber, coating emulsion on the surface of the solidified fiber, and controlling the liquid feeding amount through an extrusion roller and an emulsion treatment device;
4.5) drying: and after the emulsion treatment is finished, drying by a drying roller at 145-155 ℃ to obtain a lyocell fiber finished product.
In the step 4.2), the coagulating bath is an aqueous solution containing 5-10% of N-methylmorpholine-N oxide.
The invention has the beneficial effects that: the plant dye is directly added into the spinning solution of the lyocell fiber, so that the purpose of environmental protection and dye-free is achieved, and the light-resistant color fastness of the plant dye is improved by utilizing the natural light shielding effect and excited state electron quenching effect of the graphene. Meanwhile, lanthanum nitrate or cerium nitrate and the like are used as sources of rare earth ions and are matched with the action of graphene, the plant dye is firmly combined on the edge of a non-crystalline area or even a crystalline area and forms firm multi-element combination with cellulose molecules, and the color fastness and the stability of the natural dye are improved. The invention has obvious effect on improving the color light and the performance, saves the dyeing process, and is energy-saving and environment-friendly.
Detailed Description
The dyeing method of the lyocell fiber comprises the following steps:
1) preparing a lyocell spinning solution according to mass percent: the lyocell spinning solution comprises 6-16% of cellulose pulp, 84-94% of N-methylmorpholine-N oxide aqueous solution and 0-0.05% of an auxiliary agent; wherein the cellulose content of the cellulose pulp is 85-97%The polymerization degree is 600-1800; the water content of the N-methylmorpholine-N oxide aqueous solution is 85-96%. The auxiliary agent is in CaCl2One or more of talcum powder, peregal O, glycerol, antioxidant PG, antioxidant TBHQ and antioxidant BHA.
2) Preparing plant dye slurry: mixing 50-80% of plant dye and 20-50% of water uniformly according to the mass percentage to obtain plant dye slurry; the plant dye is one or more selected from indigo dye, madder dye, safflower dye, Su santal dye, Chinese gall dye, dioscorea cirrhosa dye, sappan dye, sophora flower dye, turmeric dye, gardenia dye or phellodendron amurense dye.
3) Preparing composite color paste: adding 50-200% of graphene relative to the total amount of the plant dye into the plant dye slurry according to the mass percent, mixing, performing ultrasonic dispersion for 1-2 hours, adding 50-100% of rare earth ions relative to the total amount of the plant dye into the slurry according to the mass percent, and uniformly mixing to obtain the composite color paste.
4) Mixing the composite color paste obtained in the step 3) and the lyocell spinning solution obtained in the step 1) according to the following steps: 0.5-10% of composite color paste and 90-99.5% of lyocell spinning stock solution are mixed and stirred for 1-3 hours, then graphene which accounts for 0.01-1% of the total weight of the lyocell spinning stock solution is added again according to the mass percentage, the mixture is uniformly mixed to obtain the spinning stock solution, and then the spinning is carried out immediately.
The total amount of the graphene added twice in the step 3) and the step 4) is 0.01-2% of the total amount of the cellulose pulp.
The spinning step in the step 4) comprises the following steps:
4.1) spinning: under the spinning condition that the temperature is 80-130 ℃, the spinning stock solution is sprayed out through a spinning nozzle of a spinning nozzle;
4.2) solidification: after the spinning solution is sprayed out through a spinneret, primarily solidifying the sprayed spinning solution by using cold air with the temperature of 5-15 ℃ and the air speed of 5-30 m/s; then directly feeding the spinning solution subjected to primary solidification into a solidification bath for secondary solidification, wherein the solidification temperature is less than or equal to 30 ℃; obtaining solidified fiber; the coagulating bath is an aqueous solution containing 5-10% of N-methylmorpholine-N oxide;
4.3) water washing: feeding the coagulated fiber into a washing tank through a traction roller to remove residual solvent brought by the coagulation bath, wherein the water used for washing is soft water subjected to impurity removal and soluble metal ion removal, and the washing temperature is 40-80 ℃; after washing, recovering the solvent in the water bath;
4.4) emulsion treatment: washing and drying the solidified fiber, coating emulsion on the surface of the solidified fiber, and controlling the liquid feeding amount through an extrusion roller and an emulsion treatment device; aims to improve the smoothness and the softness of the fiber, reduce the generation of friction and static electricity and improve the spinning processing performance of the fiber;
4.5) drying: and after the emulsion treatment is finished, drying by a drying roller at 145-155 ℃ to obtain a lyocell fiber finished product.
The invention is further illustrated with respect to specific examples below:
the first embodiment is as follows:
the steps of this embodiment are as follows:
1) preparing a lyocell spinning solution according to mass percent: the lyocell spinning solution comprises 6.56% of cellulose pulp, 93.4% of N-methylmorpholine-N oxide aqueous solution and 0.04% of auxiliary agent; wherein the cellulose pulp has a cellulose content of 87% and a degree of polymerization of 1400; the water content of the N-methylmorpholine-N oxide aqueous solution is 86%. The auxiliary agent is CaCl2And an antioxidant PG.
2) Preparing a plant dye solution: mixing 50% of vegetable dye and 50% of water uniformly according to the mass percentage to obtain vegetable dye liquid; the plant dye is indigo dye.
3) Preparing composite color paste: adding 125% of graphene relative to the total amount of the plant dye into the plant dye slurry according to the mass percent, mixing, performing ultrasonic dispersion for 1h, adding 60% of rare earth ions relative to the total amount of the plant dye into the slurry according to the mass percent, and uniformly mixing to obtain the composite color paste.
4) Mixing the composite color paste obtained in the step 3) and the lyocell spinning solution obtained in the step 1) according to the following steps: 5% of composite color paste and 95% of lyocell spinning stock solution are mixed and stirred for 3 hours, then 0.06% of graphene relative to the total amount of the lyocell spinning stock solution is added again according to the mass percentage, the mixture is uniformly mixed to obtain the spinning stock solution, and then the spinning is carried out immediately.
The spinning step in the step 4) comprises the following steps:
4.1) spinning: under the spinning condition that the temperature is 120 ℃, the spinning stock solution is sprayed out through a spinning nozzle of a spinning nozzle;
4.2) solidification: after the spinning solution is sprayed out through a spinneret, the sprayed spinning solution is subjected to primary solidification by using cold air with the temperature of 15 ℃ and the air speed of 20 m/s; then directly feeding the spinning solution subjected to primary solidification into a solidification bath for secondary solidification, wherein the solidification temperature is less than or equal to 30 ℃; obtaining solidified fiber; the coagulating bath is an aqueous solution containing 6% of N-methylmorpholine-N-oxide;
4.3) water washing: feeding the coagulated fiber into a washing tank through a traction roller to remove residual solvent brought by the coagulation bath, wherein the water used for washing is soft water subjected to impurity removal and soluble metal ion removal, and the washing temperature is 40 ℃; after washing, recovering the solvent in the water bath;
4.4) emulsion treatment: washing and drying the solidified fiber, coating emulsion on the surface of the solidified fiber, and controlling the liquid feeding amount through an extrusion roller and an emulsion treatment device;
4.5) drying: after the emulsion treatment is finished, drying the obtained product by a drying roller at 150 ℃ to obtain a lyocell fiber finished product.
The plant dye has low blending concentration, the difficulty in the preparation process of the composite system is low, and the error rate of production operation is low. And the influence of water on a spinning solution system can be reduced to the minimum by adding the auxiliary agent.
Example two:
the steps of this embodiment are as follows:
1) preparing a lyocell spinning solution according to mass percent: the lyocell spinning solution comprises 10% of cellulose pulp, 89.97% of N-methylmorpholine-N oxide aqueous solution and 0.03% of auxiliary agent; wherein the cellulose pulp has a cellulose content of 92% and a degree of polymerization of 1500; the water content of the N-methylmorpholine-N oxide aqueous solution is 88%. The above-mentionedThe auxiliary agent is in CaCl2One of peregal O, glycerin and antioxidant TBHQ.
2) Preparing plant dye slurry: mixing 70% of plant dye and 30% of water uniformly according to the mass percentage to obtain plant dye slurry; the vegetable dye is a Chinese gall dye and a phellodendron amurense dye.
3) Preparing composite color paste: adding 60% of graphene relative to the total amount of the plant dye into the plant dye slurry according to the mass percent, mixing, performing ultrasonic dispersion for 1h, adding 65% of rare earth ions relative to the total amount of the plant dye into the slurry according to the mass percent, and uniformly mixing to obtain the composite color paste.
4) Mixing the composite color paste obtained in the step 3) and the lyocell spinning solution obtained in the step 1) according to the following steps: mixing 3.5% of composite color paste and 96.5% of Lyocell spinning solution, stirring for 3 hours, then adding 0.98% of graphene relative to the total amount of the Lyocell spinning solution according to mass percent again, uniformly mixing to obtain the spinning solution, and then immediately spinning.
The spinning step in the step 4) comprises the following steps:
4.1) spinning: under the spinning condition that the temperature is 130 ℃, the spinning stock solution is sprayed out through a spinning nozzle of a spinning nozzle;
4.2) solidification: after the spinning solution is sprayed out through a spinneret, the sprayed spinning solution is subjected to primary solidification by using cold air with the temperature of 15 ℃ and the air speed of 30 m/s; then directly feeding the spinning solution subjected to primary solidification into a solidification bath for secondary solidification, wherein the solidification temperature is less than or equal to 30 ℃; obtaining solidified fiber; the coagulating bath is an aqueous solution containing 5% of N-methylmorpholine-N-oxide;
4.3) water washing: feeding the coagulated fiber into a washing tank through a traction roller to remove residual solvent brought by the coagulation bath, wherein the water used for washing is soft water subjected to impurity removal and soluble metal ion removal, and the washing temperature is 40 ℃; after washing, recovering the solvent in the water bath;
4.4) emulsion treatment: washing and drying the solidified fiber, coating emulsion on the surface of the solidified fiber, and controlling the liquid feeding amount through an extrusion roller and an emulsion treatment device;
4.5) drying: after the emulsion treatment is finished, drying the obtained product by a drying roller at 150 ℃ to obtain a lyocell fiber finished product.
The embodiment fully considers the adsorbability of the layered graphene and the coordination effect of rare earth ions, increases the reaction conditions of a composite system, ensures the uniform dispersion of plant dyes, resists the color light change generated by the fluctuation of the pH value of spinning solution, and efficiently adsorbs and bonds cellulose molecular chains.
Example three:
the steps of this embodiment are as follows:
1) preparing a lyocell spinning solution according to mass percent: the lyocell spinning solution comprises 15.5% of cellulose pulp, 84.45% of N-methylmorpholine-N oxide aqueous solution and 0.05% of auxiliary agent; wherein the cellulose pulp has a cellulose content of 86% and a degree of polymerization of 1100; the water content of the N-methylmorpholine-N oxide aqueous solution is 91%. The auxiliary agent is CaCl2Glycerol and the antioxidant PG.
2) Preparing plant dye slurry: mixing 55% of plant dye and 45% of water uniformly according to the mass percentage to obtain plant dye slurry; the vegetable dye is madder dye.
3) Preparing composite color paste: adding 150% of graphene relative to the total amount of the plant dye into the plant dye slurry according to the mass percent, mixing, performing ultrasonic dispersion for 1h, adding 75% of rare earth ions relative to the total amount of the plant dye into the slurry according to the mass percent, and uniformly mixing to obtain the composite color paste.
4) Mixing the composite color paste obtained in the step 3) and the lyocell spinning solution obtained in the step 1) according to the following steps: 8% of composite color paste and 92% of lyocell spinning stock solution are mixed and stirred for 3 hours, then 0.09% of graphene relative to the total amount of the lyocell spinning stock solution is added again according to the mass percentage, the mixture is uniformly mixed to obtain the spinning stock solution, and then the spinning is carried out immediately.
The total amount of the graphene added twice in the step 3) and the step 4) is 0.01-2% of the total amount of the cellulose pulp.
The spinning step in the step 4) comprises the following steps:
4.1) spinning: under the spinning condition that the temperature is 120 ℃, the spinning stock solution is sprayed out through a spinning nozzle of a spinning nozzle;
4.2) solidification: after the spinning solution is sprayed out through a spinneret, the sprayed spinning solution is subjected to primary solidification by using cold air with the temperature of 15 ℃ and the air speed of 30 m/s; then directly feeding the spinning solution subjected to primary solidification into a solidification bath for secondary solidification, wherein the solidification temperature is less than or equal to 30 ℃; obtaining solidified fiber; the coagulating bath is an aqueous solution containing 6% of N-methylmorpholine-N-oxide;
4.3) water washing: feeding the coagulated fiber into a washing tank through a traction roller to remove residual solvent brought by the coagulation bath, wherein the water used for washing is soft water subjected to impurity removal and soluble metal ion removal, and the washing temperature is 40 ℃; after washing, recovering the solvent in the water bath;
4.4) emulsion treatment: washing and drying the solidified fiber, coating emulsion on the surface of the solidified fiber, and controlling the liquid feeding amount through an extrusion roller and an emulsion treatment device;
4.5) drying: after the emulsion treatment was completed, drying was performed by a drying roll at 155 ℃ to obtain a lyocell fiber finished product.
The embodiment adjusts the addition of graphite alkene, utilizes the effect that graphite alkene increases the fine crystallization district of cellulose a small amount in the spinning solution forming process, further promotes the color fastness.
Claims (7)
1. A dyeing method of lyocell fiber is characterized in that: the method comprises the following steps:
1) preparing a lyocell spinning solution according to mass percent: the lyocell spinning solution comprises 6-16% of cellulose pulp, 84-94% of N-methylmorpholine-N oxide aqueous solution and 0-0.05% of an auxiliary agent;
wherein the cellulose content of the cellulose pulp is 85-97%, and the polymerization degree is 600-1800; the water content of the N-methylmorpholine-N oxide aqueous solution is 85-96%;
2) preparing plant dye slurry: mixing 50-80% of plant dye and 20-50% of water uniformly according to the mass percentage to obtain plant dye slurry;
3) preparing composite color paste: adding 50-200% of graphene relative to the total amount of the plant dye into the plant dye slurry according to the mass percent, mixing, performing ultrasonic dispersion for 1-2 hours, adding 50-100% of rare earth ions relative to the total amount of the plant dye into the slurry according to the mass percent, and uniformly mixing to obtain composite color paste;
4) mixing the composite color paste obtained in the step 3) and the lyocell spinning solution obtained in the step 1) according to the following steps: 0.5-10% of composite color paste and 90-99.5% of lyocell spinning stock solution are mixed and stirred for 1-3 hours, then graphene which accounts for 0.01-1% of the total weight of the lyocell spinning stock solution is added again according to the mass percentage, the mixture is uniformly mixed to obtain the spinning stock solution, and then the spinning is carried out immediately.
2. The method of dyeing lyocell fiber according to claim 1, characterized in that: in the step 1), the auxiliary agent is in CaCl2One or more of talcum powder, peregal O, glycerol, antioxidant PG, antioxidant TBHQ and antioxidant BHA.
3. The method of dyeing lyocell fiber according to claim 1, characterized in that: in the step 2), the plant dye is one or more selected from indigo dye, madder dye, safflower dye, sapling dye, Chinese gall dye, dioscorea cirrhosa dye, sappan dye, sophora flower dye, turmeric dye, gardenia dye and phellodendron dye.
4. The method of dyeing lyocell fiber according to claim 1, characterized in that: the total amount of the graphene added twice in the step 3) and the step 4) is 0.01-2% of the total amount of the cellulose pulp.
5. The method of dyeing lyocell fiber according to claim 1, characterized in that: in the step 3), the mass ratio of the rare earth ions to the plant dye is as follows: 1: 1-2.
6. The method of dyeing lyocell fiber according to claim 1, characterized in that: the spinning step in the step 4) comprises the following steps:
4.1) spinning: under the spinning condition that the temperature is 80-130 ℃, the spinning stock solution is sprayed out through a spinning nozzle of a spinning nozzle;
4.2) solidification: after the spinning solution is sprayed out through a spinneret, primarily solidifying the sprayed spinning solution by using cold air with the temperature of 5-15 ℃ and the air speed of 5-30 m/s; then directly feeding the spinning solution subjected to primary solidification into a solidification bath for secondary solidification, wherein the solidification temperature is less than or equal to 30 ℃; obtaining solidified fiber;
4.3) water washing: feeding the coagulated fiber into a washing tank through a traction roller to remove residual solvent brought by the coagulation bath, wherein the water used for washing is soft water subjected to impurity removal and soluble metal ion removal, and the washing temperature is 40-80 ℃; after washing, recovering the solvent in the water bath;
4.4) emulsion treatment: washing and drying the solidified fiber, coating emulsion on the surface of the solidified fiber, and controlling the liquid feeding amount through an extrusion roller and an emulsion treatment device;
4.5) drying: and after the emulsion treatment is finished, drying by a drying roller at 145-155 ℃ to obtain a lyocell fiber finished product.
7. The method of dyeing lyocell fiber according to claim 6, characterized in that: in the step 4.2), the coagulating bath is an aqueous solution containing 5-10% of N-methylmorpholine-N oxide.
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| CN109629025A (en) * | 2018-12-29 | 2019-04-16 | 恒天纤维集团有限公司 | A kind of coloured anti-bacterial Lyocell fiber and preparation method thereof |
| CN109629025B (en) * | 2018-12-29 | 2021-06-25 | 恒天纤维集团有限公司 | Colored antibacterial Lyocell fiber and preparation method thereof |
| CN115537956A (en) * | 2022-09-28 | 2022-12-30 | 百事基材料（青岛）股份有限公司 | Lyocell macrobiological fiber containing bioactive components and preparation method thereof |
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Application publication date: 20200707 |