CN115672705A - Novel wool fiber, preparation method thereof and woolen sweater prepared from same - Google Patents
Novel wool fiber, preparation method thereof and woolen sweater prepared from same Download PDFInfo
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Abstract
The application relates to the technical field of spinning, and particularly discloses novel wool fibers, a preparation method thereof and a woolen sweater made of the fibers, wherein the novel wool fibers comprise wool fibers and a gel film coated on the surfaces of the wool fibers; the application also provides a preparation method of the novel wool fiber, which comprises the steps of preparing gel liquid, spraying the gel liquid on the surface of the wool fiber, and drying to obtain the novel wool fiber; according to the application, the gel liquid is sprayed on the surface of the wool fiber to form the wrapped gel film, so that the damage of the wool fiber caused by processing can be effectively avoided, the plasticity and the spinnability of the wool fiber are improved, the processing performance, the mechanical property and the health care performance of the wool fiber are improved, and the obtained wool fiber has the advantages of smooth surface, good glossiness, low fineness and soft hand feeling; adopt the woollen sweater that this application novel wool fibre made, the comfort level is high, and elasticity is good, and health care performance is excellent, durable wear.
Description
Technical Field
The application relates to the technical field of spinning, in particular to novel wool fibers, a preparation method thereof and a woolen sweater prepared from the fibers.
Background
The wool fabric has the advantages of softness, heat preservation, good elasticity and the like, but also has the defects of easy pilling, felting, deformation and the like. The main reason for the felting of wool fabrics is the directional friction effect caused by the scale on the surface of wool. Under the combined action of moisture, heat and mechanical external force, fibers are mutually interpenetrated and intertwined, and are interwoven and felted, so that the fabric shrinks tightly, the size is changed, and the phenomenon of felting is generated. Therefore, the directional friction effect of the wool fiber is reduced, and the premise of shrinkproof of the wool fabric is provided.
In the related art, methods for reducing the directional friction effect of wool fibers mainly include a decrement method and an increment method. The decrement method, namely, the scale stripping processing, is used for completely or partially corroding and removing scale layers on the surface of the wool, and specifically comprises an oxychlorination method, a potassium permanganate method, an enzyme treatment method and the like. Wherein, the chlorine oxidation method strips scales on the surface of the fiber through chlorination, destroys the interaction between the scale layer and the fiber, is very easy to damage the wool pile and can generate serious environmental pollution; potassium permanganate has strong oxidizing ability, and can easily cause damage to wool fibers; the enzyme treatment method has great operation difficulty and is difficult to accurately control the enzyme performance and the treatment program. The increment method is to cover the wool scale layer, and the scale layer at the outer side of the wool fiber is covered by resin, sol-gel, nano particles, ionic crystals and the like. The fineness of the wool fiber obtained by the current incremental processing is obviously increased, the surface uniformity and the flatness of the wool fiber are poor, and the spinnability and the softness are reduced. In order to overcome the defects of the wool shrink-proof treatment process, a novel wool fiber, a preparation method thereof and a woolen sweater prepared from the fiber are urgently needed to be researched.
Disclosure of Invention
In order to solve the problems that the operation difficulty is high, and wool fibers are easily damaged and the performance is reduced in the current wool shrink-proof treatment process, the application provides novel wool fibers, a preparation method thereof and a woolen sweater prepared from the novel wool fibers.
In a first aspect, the present application provides novel wool fibers, using the following technical solution:
the novel wool fiber comprises wool fiber and a gel film coated on the surface of the wool fiber; the gel film is obtained by spraying gel liquid on the surface of wool fiber and then drying; the spraying amount of the gel liquid is 5-8% of the mass of the wool fibers;
the gel liquid comprises the following raw materials in parts by weight: 50-60 parts of waterborne polyurethane, 3-7 parts of nano zinc oxide, 2-3 parts of nano graphene, 0.1-0.5 part of cellulose ether, 0.1-0.3 part of methylene succinic acid, 1-2 parts of polyethylene glycol, 1-3 parts of potassium silicate and 22-28 parts of water.
By adopting the technical scheme, the gel liquid is sprayed on the surface of the wool fiber to form the wrapped gel film, so that the damage of the wool fiber caused by processing can be effectively avoided, the plasticity and the spinnability of the wool fiber are improved, and the processing performance, the mechanical property and the health care performance of the wool fiber are improved.
Preferably, the gel liquid comprises the following raw materials in parts by weight: 55 parts of waterborne polyurethane, 6 parts of nano zinc oxide, 2.5 parts of nano graphene, 0.3 part of cellulose ether, 0.2 part of methylene succinic acid, 1.5 parts of polyethylene glycol, 2 parts of potassium silicate and 25 parts of water.
By adopting the technical scheme, the gel liquid is safe in raw material selection, scientific in formula, and excellent in comprehensive performance, and the processing performance, the mechanical property and the health care performance of wool fibers can be further improved.
Preferably, the wool fibers are pretreated by the following method:
washing the wool fibers with absolute ethyl alcohol and deionized water in sequence, then carrying out water bath heat treatment, and drying to obtain the pretreated wool fibers.
By adopting the technical scheme, non-fibrous substances on the wool fibers can be effectively removed through washing treatment, the high-purity wool fibers are obtained, and then the wool fibers are puffed in a water bath, so that the plasticity of the wool fibers in the subsequent processing process is improved.
Preferably, the water bath treatment temperature is 70-80 ℃, and the time is 30-50min.
Through adopting above-mentioned technical scheme, can avoid water-bath heat treatment to cause the damage to the wool fibre when guaranteeing to obtain good plasticity.
Preferably, the mass ratio of the nano zinc oxide to the nano graphene is 2.4.
By adopting the technical scheme, the nano zinc oxide and the nano graphene have excellent performances of heat preservation, antibiosis, antistatic, ultraviolet radiation resistance and the like; in addition, the nano-zinc oxide has good dispersibility and compatibility, the mass ratio of the nano-zinc oxide to the nano-graphene in the gel film is controlled, the dispersion uniformity of the nano-graphene can be obviously improved, and the antibacterial property, the strength and other comprehensive properties of the wool fiber are further improved.
In a second aspect, the present application provides a method for preparing a novel wool fiber, which adopts the following technical scheme:
the preparation method of the novel wool fiber comprises the following steps:
s1, weighing raw materials of waterborne polyurethane, nano zinc oxide, nano graphene, cellulose ether, methylene succinic acid, polyethylene glycol, potassium silicate and water, and uniformly mixing to obtain a gel solution;
s2, spraying the gel liquid on the surface of the pretreated wool fiber, and drying to obtain the novel wool fiber.
Preferably, the concrete preparation steps of the gel solution in the step S1 are as follows:
s1.1, adding water into nano zinc oxide and nano graphene for dispersion, adding methylene succinic acid and polyethylene glycol for continuous uniform dispersion, and obtaining a mixed solution;
s1.2, uniformly blending the aqueous polyurethane, the cellulose ether, the potassium silicate and the mixed solution prepared in the step S1.1 to obtain a gel solution.
Preferably, the dispersing in step S1.1 specifically refers to: firstly, carrying out ultrasonic dispersion for 15-30min under the conditions that the water temperature is 40-60 ℃, the ultrasonic power is 300-400W and the ultrasonic frequency is 22-28kHz, adding water into nano zinc oxide and nano graphene for uniform dispersion, then adding methylene succinic acid and polyethylene glycol, keeping the conditions unchanged, and continuing to disperse for 1-2h to obtain a mixed solution.
Preferably, the blending in step S1.2 specifically refers to: and (2) controlling the stirring speed to be 700-800r/min, adding the cellulose ether, the potassium silicate and the mixed solution prepared in the step (S1.1) into the waterborne polyurethane while stirring, and continuously stirring and mixing for 30-50min after the addition is finished to obtain the gel solution.
By adopting the technical scheme, the nano zinc oxide and the nano graphene are modified by adopting the methylene succinic acid and the polyethylene glycol, the dispersity and the compatibility of the nano zinc oxide and the nano graphene can be obviously improved, and the obtained gel liquid is used for treating wool fibers, so that the processing performance, the mechanical property and the health care performance of the wool fibers can be obviously improved.
Preferably, the spraying in step S2 specifically refers to: uniformly spraying gel liquid with the mass of 2-4% of the pretreated wool fiber on the surface of the pretreated wool fiber, controlling the length of the stretched wool fiber to be 110-150% of the original length at the temperature of 100-120 ℃, carrying out primary stretching to obtain stretched fiber, uniformly spraying gel liquid with the mass of 3-4% of the pretreated wool fiber on the surface of the stretched fiber, controlling the stretching temperature to be unchanged, controlling the length of the stretched wool fiber to be 110-120% of the original length, carrying out secondary stretching, and carrying out heat preservation and drying after the stretching is finished to obtain the novel wool fiber.
By adopting the technical scheme, the gel solution is sprayed on the surface of the pretreated wool fiber twice, and the stretching treatment is carried out after each spraying, so that the scales on the surface of the wool fiber are thinned and thinned, the diameter and the height are obviously reduced, and the directional friction effect of the wool fiber is greatly reduced; the gel liquid of this application spraying is except playing tensile in-process and avoiding the fibrous damage effect, can also realize the design of tensile back wool fibre to reach effects such as shrink-proof, anti pilling, resistant washing.
The third aspect, this application provides the woollen sweater that adopts novel wool fibre to make, adopts following technical scheme:
the woolen sweater is prepared by weaving the novel wool fiber into the ready-made garment.
By adopting the technical scheme, the novel wool fiber prepared by the method has the advantages of smooth surface, good glossiness, low fineness and soft hand feeling; it has excellent shrink-proof, anti-pilling, water-fast, performances such as cold-proof, antibiotic, antistatic, anti ultraviolet radiation, adopts the woollen sweater that this application novel wool fibre made, and the comfort level is high, and the elasticity is good, and health care performance is excellent, durable wearing.
In summary, the present application has the following beneficial effects:
1. according to the application, the aqueous polyurethane is selected as a main material, the gel liquid is obtained by adding and blending modified nano zinc oxide, nano graphene and other raw materials, the wool fibers subjected to gel liquid spraying treatment are fine in hand feeling and good in adhesion, the wool fiber damage caused by processing can be effectively avoided, the plasticity and spinnability of the wool fibers are improved, and the processability, mechanical property and health care performance of the wool fibers are improved.
2. The gel solution is sprayed to the surface of the pretreated wool fiber twice, and stretching treatment is carried out after each spraying, so that scales on the surface of the wool fiber are thinned and thinned, the diameter height is obviously reduced, and the directional friction effect of the wool fiber is greatly reduced; the gel liquid of this application spraying is except playing the tensile in-process and avoid the fiber damage, can also realize the fibrous design of wool after the drawing to reach effects such as shrink-proof, anti balling-up, water-fast.
3. The novel wool fiber prepared by the method has smooth surface, good glossiness, low fineness and soft hand feeling; it has excellent shrink-proof, anti pilling, resistant washing, cold-proof, antibiotic, antistatic, performance such as ultraviolet radiation resistance, adopts the woollen sweater that this application novel wool fibre made, and the comfort level is high, and elasticity is good, and health care performance is excellent, durable.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation examples 1 to 7 and comparative preparation examples 1 to 3 provide gel liquids and methods for preparing the same, and the following description will be made by taking preparation example 1 as an example.
Preparation example 1
The gel liquid comprises the following raw materials: 50Kg of waterborne polyurethane, 3Kg of nano zinc oxide, 2Kg of nano graphene, 0.1Kg of cellulose ether, 0.1Kg of methylenesuccinic acid, 1Kg of polyethylene glycol, 1Kg of potassium silicate and 22Kg of water; wherein the waterborne polyurethane is Kocesa waterborne polyurethane DL1099.
The preparation method of the gel liquid comprises the following specific steps:
s1.1, firstly, carrying out ultrasonic dispersion for 30min under the conditions that the water temperature is 40 ℃, the ultrasonic power is 300W and the ultrasonic frequency is 22kHz, adding water into nano zinc oxide and nano graphene to be uniformly dispersed, then adding methylene succinic acid and polyethylene glycol, keeping the conditions unchanged, and continuously dispersing for 1h to obtain a mixed solution;
s1.2, controlling the stirring speed to be 700r/min, adding the cellulose ether, the potassium silicate and the mixed solution prepared in the step S1.1 into the waterborne polyurethane while stirring, and continuously stirring and mixing for 50min after the addition is finished to obtain the gel solution.
Preparation examples 2 to 3, which are the same as preparation example 1 except that the amount of the raw materials for the gel liquid was different, are as shown in Table 1 below.
| The dosage of the raw materials is per Kg | Preparation example 1 | Preparation example 2 | Preparation example 3 |
| Aqueous polyurethane | 50 | 55 | 60 |
| Nano zinc oxide | 3 | 6 | 7 |
| Nano graphene | 2 | 2.5 | 3 |
| Cellulose ethers | 0.1 | 0.3 | 0.5 |
| Methylenesuccinic acid | 0.1 | 0.2 | 0.3 |
| Polyethylene glycol | 1 | 1.5 | 2 |
| Potassium silicate | 1 | 2 | 3 |
| Water (I) | 22 | 25 | 28 |
Preparation examples 4 to 5 were the same as preparation example 2 except that the conditions for preparing the gel solution were different, and the following table 2 was used.
Preparation example 6 is the same as preparation example 4 except that the total amount of nano zinc oxide and nano graphene is not changed, and the mass ratio of nano zinc oxide to nano graphene is 2.
Preparation example 7 is the same as preparation example 4 except that the total amount of nano zinc oxide and nano graphene is not changed, and the mass ratio of nano zinc oxide to nano graphene is 3.
Comparative preparation example 1 is identical to preparation example 4 except that nano-zinc oxide and the like are replaced by nano-graphene in mass.
Comparative preparation example 2 is identical to preparation example 4 except that nano-graphene and the like are replaced by nano-zinc oxide.
Comparative preparation example 3, the same as preparation example 4, differs only in that the specific preparation steps of the gel liquid are:
s1.1, firstly, carrying out ultrasonic dispersion for 112min under the conditions that the water temperature is 50 ℃, the ultrasonic power is 350W and the ultrasonic frequency is 25kHz, and adding water into nano zinc oxide and nano graphene to uniformly disperse to obtain dispersion liquid;
s1.2, controlling the stirring speed to be 750r/min, adding the cellulose ether, the methylene succinic acid, the polyethylene glycol, the potassium silicate and the dispersion liquid prepared in the step S1.1 into the waterborne polyurethane while stirring, and continuously stirring and mixing for 40min after the addition is finished to obtain a gel liquid.
Examples 1-9 provide novel wool fibers and methods for their preparation, and are illustrated below by way of example 1.
The novel wool fiber comprises wool fiber and a gel film coated on the surface of the wool fiber.
The preparation method of the novel wool fiber specifically comprises the following preparation steps:
s2.1, washing the sheep wool fiber raw material with the average diameter of 25 microns with absolute ethyl alcohol and deionized water in sequence, then carrying out water bath heat treatment at the water bath treatment temperature of 70 ℃ for 50min, and carrying out heat preservation and drying to obtain the pretreated wool fiber;
s2.2, uniformly spraying gel liquid with the mass of 2% of that of the pretreated wool fibers on the surface of the pretreated wool fibers, controlling the length of the stretched wool fibers to be 110% of the original length at the temperature of 100 ℃, carrying out primary stretching to obtain stretched fibers, uniformly spraying gel liquid with the mass of 3% of that of the pretreated wool fibers on the surface of the stretched fibers, controlling the stretching temperature to be unchanged, controlling the length of the stretched wool fibers to be 110% of the original length, carrying out secondary stretching, and after the stretching is finished, carrying out heat preservation and drying to obtain novel wool fibers, wherein the gel liquid is the gel liquid in the preparation example 1.
Examples 2-3, identical to example 1, differ only in the conditions for the preparation of the novel wool fibres, as shown in Table 3 below.
Example 4 is the same as example 2 except that the gel liquid is the gel liquid in preparation example 2.
Example 5 differs from example 2 only in that the gel liquid was the gel liquid in preparation example 3.
Example 6 is the same as example 2 except that the gel liquid was the gel liquid in preparation example 4.
Example 7 differs from example 2 only in that the gel liquid was the gel liquid in preparation example 5.
Example 8 is the same as example 2 except that the gel liquid is the gel liquid in preparation example 6.
Example 9 differs from example 2 only in that the gel liquid was the gel liquid in preparation example 7.
To verify the overall properties of the novel wool fibers produced in examples 1 to 9 of the present application, the applicant set comparative examples 1 to 6, specifically as follows:
comparative example 1, the same as example 2, except that the gel liquid was the gel liquid in comparative preparation example 1.
Comparative example 2, the same as example 2 except that the gel liquid was the gel liquid in comparative preparation example 2.
Comparative example 3, the same as example 2, except that the gel liquid was the gel liquid in comparative preparation example 3.
Comparative example 4, the same as example 2, only difference is that wool fiber is not pretreated, namely gel liquid with 3% of wool fiber mass is directly and evenly sprayed on the surface of wool fiber, the length after stretching is controlled to be 130% of the original length at the temperature of 110 ℃, primary stretching is carried out to obtain stretched fiber, gel liquid with 3.5% of pretreated wool fiber mass is evenly sprayed on the surface of the stretched fiber, the stretching temperature is controlled to be unchanged, the length after stretching is 115% of the original length, secondary stretching is carried out, after the stretching is completed, heat preservation and drying are carried out to obtain novel wool fiber, wherein the gel liquid is the gel liquid in preparation example 1.
Comparative example 5, the same as example 2, only difference is that, only once spraying and once stretching treatment are carried out, namely, gel liquid with 6.5% of wool fiber mass is evenly sprayed on the surface of the pretreated wool fiber, the length after stretching is controlled to be 145% of the original length at the temperature of 110 ℃, once stretching is carried out to obtain stretched fiber, the temperature is controlled to be unchanged, and heat preservation and drying are carried out to obtain the novel wool fiber, wherein the gel liquid is the gel liquid in the preparation example 1.
Comparative example 6, the same as example 2, the difference is only that, the pretreated wool fiber is stretched first, then the gel liquid spraying is carried out, namely, the pretreated wool fiber is placed at the temperature of 110 ℃, the length after the stretching is controlled to be 145% of the original length, the stretching is carried out for the first time, the stretched fiber is obtained, the gel liquid with the mass of 6.5% of the wool fiber is evenly sprayed on the surface of the stretched fiber, the temperature is controlled to be unchanged, the heat preservation and the drying are carried out, and the novel wool fiber is obtained, wherein the gel liquid is the gel liquid in the preparation example 1.
Performance detection
Novel wool fiber directional friction effect determination method
Before testing, the novel wool fiber samples in examples 1-9 and comparative examples 1-6 of the present application were first balanced for 24 hours under standard atmospheric conditions, a Y151 type fiber friction coefficient tester was used according to the winch method, 200mg (f 0) tension clips were clipped on both ends of the fiber to be tested, the rotating speed of the metal roller was adjusted to 30r/min, the torque balance reading m was read, each sample was tested 3 times, 50 samples of each novel wool fiber sample were taken for friction coefficient measurement, the average value was found, and the dynamic friction coefficient between the wool fiber and the metal roller was calculated: μ = [ lgf0-lg (f 0-m) ]/1.364;
respectively cleaning the tip and the root of the wool fiber, respectively measuring the forward friction force and the reverse friction force, calculating the forward friction coefficient (mu w) and the reverse friction coefficient (mu a), and then obtaining the Directional Friction Effect (DFE);
DEF＝(μa-μw)/(μa+μw)*100％。
novel test for antibacterial property of wool fiber
The antibacterial performance of the novel wool fiber samples in examples 1-9 and comparative examples 1-6 of the application (refer to GB/T20944.3-2008, evaluation 3 part of antibacterial performance of textiles: oscillation method), and the test bacteria are staphylococcus aureus and escherichia coli).
Novel wool fiber breaking strength test
On a tensile testing machine, the holding length is 180mm, the tensile speed is 100mm/min, the novel wool fiber samples in the examples 1 to 9 and the comparative examples 1 to 6 are tested, 50 samples of each novel wool fiber sample are subjected to fracture strength test, and the average value is taken.
The results of the above property measurements are shown in Table 4 below.
The results shown in Table 4 show that: the novel wool fibers prepared in the examples 1 to 9 of the application have low directional friction effect, and the comprehensive performances such as antibacterial property, breaking strength and the like are obviously superior to those of the novel wool fibers prepared in the comparative examples 1 to 6 and untreated wool fiber raw materials;
with reference to examples 6 and 8 to 9 and comparative examples 1 to 2, in the process of preparing the gel solution, under the condition of keeping the total addition amount unchanged, the mixture of nano zinc oxide and nano graphene is added, compared with the case of independently adding nano zinc oxide or nano graphene, the comprehensive performance of the finally obtained novel wool fiber is better, and the comprehensive performance of the finally prepared novel wool fiber can be further improved by controlling the mass ratio of the nano zinc oxide to the nano graphene, wherein when the mass ratio of the nano zinc oxide to the nano graphene in example 4 is 2.4, the prepared novel wool fiber has the lowest directional friction effect and the best antibacterial property and breaking strength;
by combining the embodiment 2 and the comparative example 3, in the process of preparing the gel solution, the nano zinc oxide and the nano graphene are modified in advance by selecting the methylene succinic acid and the polyethylene glycol, so that the comprehensive performance of the finally prepared novel wool fiber can be obviously improved;
combining example 2 and comparative example 4, it can be seen that: the wool fiber raw material is pretreated, so that the plasticity of the wool fiber raw material in the subsequent processing process can be improved, and the comprehensive performance of the finally obtained novel wool fiber is further improved;
combining example 2 and comparative examples 5-6, it can be seen that: the gel solution is sprayed on the surface of the pretreated wool fiber twice, and stretching treatment is carried out after each spraying, so that scales on the surface of the wool fiber are thinned and thinned, the diameter height is obviously reduced, the directional friction effect of the obtained novel wool fiber is greatly reduced, and the breaking strength of the novel wool fiber is improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The novel wool fiber is characterized by comprising wool fiber and a gel film coated on the surface of the wool fiber; the gel film is obtained by spraying gel liquid on the surface of wool fiber and then drying; the spraying amount of the gel liquid is 5-8% of the mass of the wool fibers;
the gel liquid comprises the following raw materials in parts by weight: 50-60 parts of waterborne polyurethane, 3-7 parts of nano zinc oxide, 2-3 parts of nano graphene, 0.1-0.5 part of cellulose ether, 0.1-0.3 part of methylene succinic acid, 1-2 parts of polyethylene glycol, 1-3 parts of potassium silicate and 22-28 parts of water.
2. A novel wool fiber according to claim 1, which is pretreated by:
washing the wool fibers with absolute ethyl alcohol and deionized water in sequence, then carrying out water bath heat treatment, and drying to obtain the pretreated wool fibers.
3. A novel wool fiber according to claim 2 wherein the water bath treatment temperature is 70-80 ℃ and the time is 30-50min.
4. Novel wool fibers according to claim 1, wherein the mass ratio of nano zinc oxide to nano graphene is 2.4.
5. A method of producing novel wool fibres according to any one of claims 1 to 4, characterised in that it comprises the following steps:
s1, weighing raw materials of waterborne polyurethane, nano zinc oxide, nano graphene, cellulose ether, methylene succinic acid, polyethylene glycol, potassium silicate and water, and uniformly mixing to obtain gel liquid;
s2, spraying the gel liquid on the surface of the pretreated wool fiber, and drying to obtain the novel wool fiber.
6. A novel wool fiber production method according to claim 5, wherein the concrete steps of the gel production in step S1 are as follows:
s1.1, adding water into nano zinc oxide and nano graphene for dispersion, and adding methylene succinic acid and polyethylene glycol for continuous uniform dispersion to obtain a mixed solution;
s1.2, uniformly blending the aqueous polyurethane, the cellulose ether, the potassium silicate and the mixed solution prepared in the step S1.1 to obtain gel liquid.
7. A novel wool fiber production method according to claim 6 wherein the dispersion in step S1.1 is specifically: firstly, ultrasonically dispersing for 15-30min under the conditions that the water temperature is 40-60 ℃, the ultrasonic power is 300-400W and the ultrasonic frequency is 22-28kHz, adding water into nano zinc oxide and nano graphene to uniformly disperse, then adding methylene succinic acid and polyethylene glycol, keeping the conditions unchanged, and continuously dispersing for 1-2h to obtain a mixed solution.
8. A method for the preparation of novel wool fibers according to claim 6 wherein the blending in step S1.2 is specifically: and (3) controlling the stirring speed to be 700-800r/min, adding the cellulose ether, the potassium silicate and the mixed solution prepared in the step (S1.1) into the waterborne polyurethane while stirring, and continuously stirring and mixing for 30-50min after the addition is finished to obtain the gel liquid.
9. A novel wool fiber production method according to claim 5, wherein the spraying in step S2 specifically refers to: uniformly spraying gel liquid with the mass of 2-4% of the pretreated wool fiber onto the surface of the pretreated wool fiber, controlling the length of the stretched wool fiber to be 110-150% of the original length at the temperature of 100-120 ℃, carrying out primary stretching to obtain stretched fiber, uniformly spraying gel liquid with the mass of 3-4% of the pretreated wool fiber onto the surface of the stretched fiber, controlling the stretching temperature to be unchanged, controlling the length of the stretched wool fiber to be 110-120% of the original length, carrying out secondary stretching, and carrying out heat preservation and drying after the stretching is finished to obtain the novel wool fiber.
10. A woolen sweater made with the novel wool fiber of any of claims 1 to 4.
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