CN113638227A

CN113638227A - Antistatic cashmere product and preparation method thereof

Info

Publication number: CN113638227A
Application number: CN202111049706.3A
Authority: CN
Inventors: 陈慧; 薛惊理; 赵振; 金国标; 薛正利
Original assignee: Jiangnan Zhizaofu Ningbo Thread Industry Co ltd
Current assignee: Jiangnan Zhizaofu Ningbo Thread Industry Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2021-11-12
Anticipated expiration: 2041-09-08
Also published as: CN113638227B

Abstract

The invention discloses an antistatic cashmere product and a preparation method thereof, belonging to the textile field, in particular to a preparation method of grafted cashmere fiber, which comprises the steps of pretreating cashmere fiber in a penetrant solution, wherein the penetrant solution contains fatty alcohol-polyoxyethylene ether and N-ethyl glucosamine; putting the pretreated cashmere fiber into an acrylonitrile solution, adding an initiator solution, and reacting to obtain grafted cashmere fiber; and further finishing to obtain the functionalized cashmere fibers, and spinning the functionalized cashmere fibers and the conductive carbon fibers to obtain the conductive cashmere yarns. The cashmere braided fabric with good antistatic performance can be obtained by further braiding the electric cashmere yarns obtained by the invention.

Description

Antistatic cashmere product and preparation method thereof

Technical Field

The invention belongs to the field of textiles, and particularly relates to an antistatic cashmere product and a preparation method thereof.

Background

With the rapid development of science and technology, the rapid popularization of electrical appliances such as computers, mobile phones and the like, the electromagnetic radiation interference in human living environments is increasingly serious. In autumn and winter, which are suitable for wearing cashmere clothes, the opportunity of charge is increased due to dry weather and floating dust particles in the air, so that people are subjected to electrostatic interference. Long-term electrostatic interference and invasion can affect the physical and psychological health of people, so that the people can have reactions such as anxiety, headache, chest distress, cough and the like; short-term electrostatic interference and invasion can also cause irritation to human skin, cause skin pruritus, and seriously cause bronchial asthma, arrhythmia and the like. The safety hazard caused by static electricity has therefore increasingly attracted attention. Since the industrialization of chemical fiber macromolecules is started, people begin to improve the conductivity of chemical fibers and prepare conductive fibers, and various conductive fibers are available.

Cashmere fiber is a natural protein polymer fiber, is composed of various amino acids, and is one of the most complicated fibers used up to now. It is different from sheep wool and goat wool, in particular to a natural fiber produced at the root of the skin of a cashmere goat, belongs to a rare special animal wool fiber, and accounts for only 0.2 percent of the total amount of animal fibers in the world. The cashmere fiber has reputations of soft gold, fiber gem and the like.

The excellent characteristics of the cashmere fiber endow the cashmere products with the advantages of softness, heat preservation, air permeability and the like, and simultaneously have good hygroscopicity and rebound resilience, thereby gaining the favor of consumers. However, the cashmere fiber structure is special, so that the cashmere fabric also has some troubles in the wearing and washing processes, such as easy pilling, influence on the appearance, unstable size caused by retraction and the like. In addition, the cashmere fiber has high resistivity and poor conductivity, so that static electricity is easy to generate in the wearing process of cashmere clothes, and the cashmere clothes cannot be worn in special occasions with strict requirements on static electricity, thereby limiting the application range of cashmere products to a great extent.

Disclosure of Invention

The invention aims to provide a preparation method of grafted cashmere fibers with good grafting rate.

The technical scheme adopted by the invention for realizing the purpose is as follows:

a preparation method of grafted cashmere fibers comprises the following steps:

pretreating cashmere fibers in a penetrant solution, wherein the penetrant solution contains fatty alcohol-polyoxyethylene ether and N-ethylglucamine;

and (3) putting the pretreated cashmere fiber into an acrylonitrile solution, adding an initiator solution, and reacting to obtain the grafted cashmere fiber.

Preferably, the initiator is potassium persulfate.

Preferably, the acrylonitrile content of the acrylonitrile solution is 45-55 wt%.

Preferably, in the grafting of the cashmere fibers, the cashmere fibers are washed by cold water, dried, then immersed in a penetrant solution, treated at the temperature of 30-50 ℃ for 20-60min, taken out, the pretreated cashmere is added into an acrylonitrile solution at the temperature of 20-30 ℃, an initiator is added at the temperature of 70-90 ℃, and after reaction for 0.5-2h, the grafted cashmere fibers are obtained by washing, soaping, washing with cold water and drying.

More preferably, the penetrant solution contains 6-15wt% of fatty alcohol-polyoxyethylene ether.

More preferably, the penetrant solution contains 0.3-1.8wt% N-ethylglucamine.

The scale layer of the cashmere fiber is divided into a surface layer, an outer layer and an inner layer. Wherein the outer layer mainly contains some long-chain fatty acids, serine, cystine and other amino acids, and has ester-like structure. The existence of these ester structures is also a main reason that cashmere fibers have high resistance and are easy to generate static electricity. The scale layer is internally provided with a cortical layer. The cortical layer comprises microfibril crystal units consisting of base fibrils, which are intercalated into an amorphous matrix, together forming the cortical layer. The fibrils are in an alpha-helical configuration, and therefore the main component is low sulfur protein; the matrix has no alpha-helix structure, is rich in cystine besides some low-sulfur proteins, and forms high-sulfur proteins due to the rich disulfide bonds of the cystine. The forces such as cystine disulfide bonds and hydrogen bonds existing in the cortex layer and other covalent bonds and ionic bonds jointly form the main chemical force for connecting the cashmere keratin. The fatty alcohol-polyoxyethylene ether and the N-ethyl glucosamine in the penetrant solution act on the cashmere fibers together, so that the large-scale damage of the structure of the cashmere fibers can be avoided, the grafting rate of the cashmere fibers is improved, the mechanical property of the cashmere fibers is improved, the breaking strength is improved, the breaking elongation is reduced, and after the penetrant solution containing the fatty alcohol-polyoxyethylene ether and the N-ethyl glucosamine is pretreated, the cashmere fibers are subjected to a series of processes, and the antistatic property of the finally obtained woven fabric is improved.

More preferably, the acrylonitrile content of the acrylonitrile solution is 45-55 wt%.

More preferably, the addition amount of the pretreated cashmere is 5-15wt% of the acrylonitrile solution.

More preferably, the initiator is potassium persulfate.

More preferably, the amount of initiator added is 1 to 5wt% of the acrylonitrile solution.

The invention discloses a grafted cashmere fiber prepared by the method.

The invention aims to provide the functional cashmere fiber which has good mechanical property and can be used for preparing the conductive cashmere yarn.

a functional cashmere fibre comprising: the grafted cashmere fiber is obtained by finishing the grafted cashmere fiber in a functional solution.

Preferably, the functional solution contains chitosan, polyurethane emulsion, lauryl betaine, sodium alginate and sodium dodecyl sulfate.

More preferably, in the preparation of the polyurethane emulsion, polyester polyol is vacuumized and dehydrated for 1-3h, diisocyanate is added, prepolymerization is carried out at the temperature of 80-90 ℃ for 1-5h to obtain a polyurethane prepolymer solution, a chain extender solution is added, chain extension reaction is carried out at the temperature of 45-55 ℃ for 0.5-3h, a modifying reagent is added when the temperature is cooled to 0-5 ℃, the reaction is carried out for 2-6h, a neutralizing reagent is added at the temperature of 20-40 ℃, and the polyurethane emulsion is obtained after stirring for 10-60 min.

Further preferably, the diisocyanate is added with the polyester polyol in a metered amount with an R value of 1.2 to 2.

Still more preferably, the chain extender solution is obtained by dissolving DMPA in NMP, and the content of DMPA in the chain extender solution is 25-35 wt%.

Still more preferably, the amount of the chain extender used is determined by the chain extension coefficient, which is 1.

Still more preferably, the modifying agent is AEAPS and the modifying agent is added dropwise.

More preferably, the modifying agent is added in an amount of 20 to 30wt% based on the weight of the polyurethane prepolymer solution.

Still more preferably, the neutralizing agent is TEA and the amount of the neutralizing agent added is 2 to 6 wt%.

Preferably, in the preparation of the functional finishing liquid, chitosan, polyurethane emulsion, lauryl betaine, sodium alginate, sodium dodecyl sulfate and deionized water are mixed and uniformly mixed to obtain the functional finishing liquid.

More preferably, the chitosan is added in an amount of 0.3 to 2.1wt% of the deionized water.

More preferably, the polyurethane emulsion is added in an amount of 0.5 to 2.5wt% of deionized water.

More preferably, lauryl betaine is added in an amount of 0.3 to 1.2wt% based on deionized water.

More preferably, sodium alginate is added in an amount of 0.5-1.5wt% of deionized water.

More preferably, the sodium lauryl sulfate is added in an amount of 0.4 to 1.2wt% of the deionized water.

Preferably, (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetic acid ethyl ester may be added to the functional finishing liquor. The addition amount of the (3-hydroxy-2-oxo-2H-pyrazine-1-yl) -acetic acid ethyl ester is 0.2 to 1.2 weight percent of the deionized water. The (3-hydroxy-2-oxo-2H-pyrazine-1-yl) -ethyl acetate is used in the functional liquid, and the finishing effect of the finishing liquid can be improved after finishing the grafted cashmere fibers by compounding with the finishing liquid, the mechanical properties of the functionalized cashmere fibers are basically not influenced, and the antistatic property of the processed and knitted cashmere braided fabric can be further improved.

Preferably, in the functional finishing, the cashmere fibers are soaked in the functional finishing liquid for 1 to 6 hours at the temperature of 20 to 40 ℃, and the functional cashmere fibers are obtained after pre-drying, baking, water washing and drying.

An electrically conductive cashmere yarn comprising: the functional cashmere fiber and the conductive carbon fiber are spun to obtain the functional cashmere fiber.

Preferably, the content of the conductive carbon fiber in the conductive cashmere yarn is 6-14 wt%.

Preferably, in the preparation of the conductive cashmere yarn, the functional cashmere fiber and the conductive carbon fiber are subjected to spinning treatment to obtain the conductive cashmere yarn. The content of the conductive carbon fiber in the cashmere yarn is 6 to 14 weight percent.

The invention discloses application of the conductive cashmere yarn in antistatic cashmere products.

The grafted cashmere fiber is obtained by grafting after pretreatment of the cashmere fiber, the grafted cashmere fiber is further treated by the functional finishing liquid to obtain the functional cashmere fiber, and the functional cashmere fiber is obtained by spinning with the conductive carbon fiber to obtain the conductive cashmere yarn, so the method has the following beneficial effects: the grafted cashmere fiber obtained by the method has good grafting effect, and the grafting rate is 38-44%; the functionalized cashmere fiber has good mechanical property, the breaking strength is 0.5-0.62 cN/dtex, and the elongation at break is reduced to some extent; the cashmere braided fabric obtained by braiding the conductive cashmere fibers has good antistatic property, and the half-life period of the electrostatic voltage is less than 10s and more than 3 s. Therefore, the invention is an antistatic cashmere product with good mechanical property and antistatic property and a preparation method thereof.

Drawings

FIG. 1 is a graph of the grafting rate of grafted cashmere fibers;

FIG. 2 is a graph of the breaking strength of the functionalized cashmere fibers;

FIG. 3 is a graph of the elongation at break of the functionalized cashmere fibers;

fig. 4 is a graph of electrostatic voltage half-life of cashmere knit fabric.

Detailed Description

The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:

example 1:

a method for preparing functional cashmere fiber,

grafting cashmere fibers: washing cashmere fibers with cold water, drying, immersing into a penetrant solution, treating at 40 ℃ for 40min, taking out, adding the pretreated cashmere into an acrylonitrile solution at 30 ℃, adding an initiator at 80 ℃, reacting for 1h, washing with cold water, soaping, washing with cold water, and drying to obtain the grafted cashmere fibers. The penetrant solution contains 9wt% of fatty alcohol-polyoxyethylene ether, the penetrant solution contains 0.6wt% of N-ethylglucamine, the acrylonitrile content in the acrylonitrile solution is 50wt%, the addition amount of the pretreated cashmere is 10wt% of the acrylonitrile solution, the initiator is potassium persulfate, and the addition amount of the initiator is 3wt% of the acrylonitrile solution.

Preparing a polyurethane emulsion: vacuumizing polyester polyol for dehydrating for 2h, adding diisocyanate, carrying out prepolymerization reaction for 3h at the temperature of 90 ℃ to obtain a polyurethane prepolymer solution, adding a chain extender solution, carrying out chain extension reaction for 1h at the temperature of 50 ℃, cooling to the temperature of 5 ℃, adding a modifying reagent, carrying out reaction for 3h, adding a neutralizing reagent at the temperature of 30 ℃, and stirring for 40min to obtain a polyurethane emulsion. Diisocyanate and polyester polyol are added according to the R value of 1.6, a chain extender solution is obtained by dissolving DMPA in NMP, the content of DMPA in the chain extender solution is 30wt%, the using amount of the chain extender is determined by the chain extension coefficient, and the chain extension coefficient is 1; the modifying agent is AEAPS, the adding mode of the modifying agent is dropwise adding, the adding amount of the modifying agent is 24wt% of the polyurethane prepolymer solution, the neutralizing agent is TEA, and the adding amount of the neutralizing agent is 4 wt%.

Preparing functional finishing liquid: mixing chitosan, polyurethane emulsion, lauryl betaine, sodium alginate, sodium dodecyl sulfate and deionized water, and uniformly mixing to obtain the functional finishing liquid. The addition amount of chitosan is 1.6wt% of deionized water, the addition amount of polyurethane emulsion is 1.2wt% of deionized water, the addition amount of lauryl betaine is 0.8wt% of deionized water, the addition amount of sodium alginate is 1wt% of deionized water, and the addition amount of sodium dodecyl sulfate is 0.9wt% of deionized water.

Functional finishing: and (3) soaking the cashmere fibers in the functional finishing liquid for 3 hours at the temperature of 30 ℃, washing with water, and drying to obtain the functionalized cashmere fibers.

Example 2:

this example is different from example 1 only in that the penetrant solution contains 1.1wt% of N-ethylglucamine in the cashmere fiber graft.

Example 3:

this example is different from example 1 only in that the penetrant solution contains 1.5wt% of N-ethylglucamine in the cashmere fiber graft.

Example 4:

a method for preparing functional cashmere fiber,

grafting cashmere fibers: washing cashmere fibers with cold water, drying, immersing into a penetrant solution, treating at 40 ℃ for 40min, taking out, adding the pretreated cashmere into an acrylonitrile solution at 30 ℃, adding an initiator at 80 ℃, reacting for 1h, washing with cold water, soaping, washing with cold water, and drying to obtain the grafted cashmere fibers. The penetrant solution contains 9wt% of fatty alcohol-polyoxyethylene ether, the penetrant solution contains 1.5wt% of N-ethylglucamine, the acrylonitrile content in the acrylonitrile solution is 50wt%, the addition amount of the pretreated cashmere is 10wt% of the acrylonitrile solution, the initiator is potassium persulfate, and the addition amount of the initiator is 3wt% of the acrylonitrile solution.

Preparing functional finishing liquid: mixing chitosan, polyurethane emulsion, lauryl betaine, sodium alginate, sodium dodecyl sulfate, (3-hydroxy-2-oxo-2H-pyrazine-1-yl) -ethyl acetate and deionized water, and uniformly mixing to obtain the functional finishing liquid. The addition amount of chitosan is 1.6wt% of deionized water, the addition amount of polyurethane emulsion is 1.2wt% of deionized water, the addition amount of lauryl betaine is 0.8wt% of deionized water, the addition amount of sodium alginate is 1wt% of deionized water, the addition amount of sodium dodecyl sulfate is 0.9wt% of deionized water, and the addition amount of (3-hydroxy-2-oxo-2H-pyrazine-1-yl) -ethyl acetate is 0.5wt% of deionized water.

Example 5:

this example is compared to example 4, except that the amount of ethyl (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -acetate added in the functional finishing liquor formulation was 0.9wt% of deionized water.

Example 6:

a preparation method of conductive cashmere yarns comprises the following steps:

and spinning the functionalized cashmere fiber and the conductive carbon fiber to obtain the cashmere yarn. The content of the conductive carbon fiber in the cashmere yarn is 10 wt%. The length of the conductive fiber is the same as that of the cashmere fiber. The functionalized cashmere fibers of this example were from example 1.

The spinning process comprises the following steps: blending, carding, spinning, winding, doubling and double twisting.

The wool additive is: the blending ratio of the raw oil FX-906, the antistatic agent FX-AS301, the raw oil and the on-machine moisture regain requirement are shown in Table 1.

TABLE 1 crude oil ratio and dampening requirement on machine

In the spinning process, the mixing of raw materials and oil and water are a key step, and the step is completed in a wool blending process. Mixing cashmere raw materials, paving and beating cashmere fibers for 2 times, adding water, beating for 1 time, and carrying out conventional wool-blocking for more than 8 hours; before the machine is used, the independently opened conductive fibers are added and mixed with the cashmere fiber layer added with the oil water for 2-3 times according to the uniform condition, so that the conductive fibers and the cashmere fibers are fully and uniformly mixed. And meanwhile, the dampening on the machine is controlled to be between 21 and 23 percent.

The carding process is the most critical process in the whole spinning process. To achieve better carding of the fibers and at the same time reduce the damage of the fibers. The appropriate spacing between the cylinders and the work rolls is selected as shown in table 2 and the speed ratios between the rolls are shown in table 3.

TABLE 2 gauge distances between the cylinder and the work rolls and doffers

Gauge/mm	A section cylinder	B-section cylinder	C-section cylinder	D section cylinder
					Working roll	0.5~0.6	0.35~0.5	0.3~0.4	0.25~0.3
Doffer	0.45	0.3	0.25	0.2

TABLE 3 speed ratio between cylinder and work roll and doffer

Speed ratio	A section cylinder	B-section cylinder	C-section cylinder	D section cylinder
					Working roll	188/2.5	360/2.5	360/2.5	390/2.5
Doffer		360/17	360/21	390/21

Meanwhile, the weight of the carded roving is determined: 0.77g/15 m; strip discharging speed: 20 m/min: wool feeding amount: 330 g; the wool feeding period is as follows: 70 s.

Spinning: setting the spinning count: 2/26Nm spun yarn drafting is controlled to be about 1.3 times; twist degree: 480T/M; twisting direction: z twisting; ingot speed: 6500-7000 rpm.

A spooling process: tension voltage 6V, 3V, 0V; the clearer parameters are shown in table 4:

TABLE 4 Cone clearer parameters

A doubling procedure: the vehicle speed is 600m/min, and the fixed length is 13200 m.

A two-for-one twisting procedure: double yarn twist: 240T/M; twisting direction: s twisting; vehicle speed: 6800 rpm.

Example 7:

this example differs from example 6 only in the functionalized cashmere fibers.

The functionalized cashmere fibers of this example were from example 2.

Example 8:

this example differs from example 6 only in the functionalized cashmere fibers.

The functionalized cashmere fibers of this example were from example 3.

Example 9:

this example differs from example 6 only in the functionalized cashmere fibers.

The functionalized cashmere fibers of this example were from example 4.

Example 10:

this example differs from example 6 only in the functionalized cashmere fibers.

The functionalized cashmere fibers of this example were from example 5.

Comparative example 1:

this comparative example is different from example 3 only in that N-ethylglucamine was not added to the penetrant solution in the cashmere fiber grafting.

Comparative example 2:

the comparative example is different from example 8 only in that N-ethylglucamine is not added to the penetrant solution in the cashmere fiber grafting step in the preparation method of the functionalized cashmere fibers.

Test example 1:

1. test of graft ratio

Test samples: the grafted cashmere fibers obtained in examples 1 to 3 and comparative example 1.

The test method comprises the following steps: in each of the above examples and comparative examples, the weight before grafting, and the weight after grafting were weighed.

The grafting ratio was calculated as follows:

graft ratio = (weight after grafting-weight before grafting)/weight before grafting × 100%.

The result of the grafting rate test of the grafted cashmere fiber obtained by the method of the present invention is shown in fig. 1, wherein the grafting rate of the grafted cashmere fiber obtained in example 3 is 42.61%, the grafting rate of the grafted cashmere fiber obtained in comparative example 1 is 36.23%, and the example 3 shows that the grafting rate of the grafted cashmere fiber is significantly increased after the cashmere fiber is immersed in the penetrant containing N-ethylglucamine for pretreatment before the cashmere fiber is grafted; the grafting ratio of the grafted cashmere fiber prepared in example 1 was 41.17%, the grafting ratio of the grafted cashmere fiber prepared in example 2 was 41.94%, and the grafting ratio of the grafted cashmere fiber was increased with the increase of the amount of N-ethylglucamine used in example 3 compared with examples 1-2, but the increase was not significant.

The grafting rate of the grafted cashmere fiber obtained by the invention is 38-44%.

2. Mechanical Property test

Test samples: the functionalized cashmere fibers prepared in examples 1 to 5 and comparative example 1.

The test method comprises the following steps: and (3) measuring the tensile property of the test sample by using an electronic single fiber strength tester.

And (3) testing conditions are as follows: the pre-tension is 0.1cN, the clamping distance is 10mm, the stretching speed is 20mm/min, and the number of the test pieces is 10.

The test results of the breaking strength of the functionalized cashmere fiber prepared by the invention are shown in fig. 2, wherein the breaking strength of the grafted cashmere fiber prepared in example 3 is 0.55cN/dtex, the breaking strength of the grafted cashmere fiber prepared in comparative example 1 is 0.43 cN/dtex, and the comparison between example 3 and comparative example 1 shows that the breaking strength of the grafted cashmere fiber obtained by immersing the cashmere fiber in a penetrant containing N-ethylglucamine for pretreatment before grafting the cashmere fiber is significantly improved; the breaking strength of the grafted cashmere fiber prepared in example 1 is 0.54 cN/dtex, the breaking strength of the grafted cashmere fiber prepared in example 2 is 0.57 cN/dtex, and the breaking strength of the grafted cashmere fiber is improved along with the increase of the use amount of N-ethylglucamine in example 3 compared with examples 1-2; examples 4-5 compared to example 3, show that the further use of (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -ethyl acetate in the finish had substantially no effect on the breaking strength of the grafted cashmere fibres.

The test results of the elongation at break of the functionalized cashmere fibers prepared by the present invention are shown in fig. 3, wherein the elongation at break of the grafted cashmere fibers prepared in example 3 is 40.59%, the elongation at break of the grafted cashmere fibers prepared in comparative example 1 is 43.72%, and the comparison between example 3 and comparative example 1 shows that the elongation at break of the grafted cashmere fibers obtained after the cashmere fibers are immersed in the penetrant containing N-ethylglucamine for pretreatment before the cashmere fibers are grafted is reduced; example 3 shows that the elongation at break of the grafted cashmere fibers is reduced with the increase of the amount of N-ethylglucamine used, compared with examples 1-2; examples 4-5 compared to example 3, show that the further use of (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -ethyl acetate in the finish had substantially no effect on the elongation at break of the grafted cashmere fibres.

The functional cashmere fiber obtained by the invention has the breaking strength of 0.5-0.62 cN/dtex and the elongation at break of less than 43 percent.

3. Test for antistatic Properties

Test samples: the conductive cashmere yarns of examples 6 to 10 and comparative example 2 were prepared by knitting interlock knit sample pieces on a 12-pin (12 pin/inch) hand flat knitting machine as samples for antistatic test.

The test method comprises the following steps: GB/T12703.1-2008. The antistatic properties are characterized by the half-life of the electrostatic voltage of the test sample.

The antistatic performance test result of the conductive cashmere yarn prepared by the invention after weaving the sample piece is shown in fig. 4, wherein the electrostatic voltage half-life period of the woven sample piece obtained by weaving the conductive cashmere yarn prepared by the embodiment 8 is 8.29s, the electrostatic voltage half-life period of the woven sample piece obtained by weaving the conductive cashmere yarn prepared by the comparative example 2 is 12.59s, and compared with the comparative example 2, the result of the embodiment 8 shows that the electrostatic voltage half-life period of the woven sample piece obtained by dipping cashmere fibers in a penetrant containing N-ethylglucamine is reduced and the antistatic performance is improved after a series of treatments and processes before the cashmere fibers are grafted; the comparison between example 8 and examples 6-7 shows that the antistatic performance of the knitted sample is improved with the increase of the amount of N-ethylglucamine; examples 9-10 compare example 8, showing that the antistatic properties of the woven swatches correlate with the use of (3-hydroxy-2-oxo-2H-pyrazin-1-yl) -ethyl acetate in the finish, reducing the electrostatic half-life of the woven swatches.

The electrostatic voltage half-life period of the braided fabric braided by the conductive cashmere yarn is less than 10s and more than 3 s.

The above embodiments are merely illustrative, and not restrictive, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. A preparation method of grafted cashmere fibers comprises the following steps:

2. The method for preparing grafted cashmere fibers according to claim 1, characterized in that: the initiator is potassium persulfate.

3. The method for preparing grafted cashmere fibers according to claim 1, characterized in that: the content of acrylonitrile in the acrylonitrile solution is 45-55 wt%.

4. A grafted cashmere fibre produced by the method of any one of claims 1 to 3.

5. A functional cashmere fibre comprising: obtained by finishing the grafted cashmere fiber of claim 4 in a functional solution.

6. The functional cashmere fiber according to claim 5, characterized in that: the functional solution contains chitosan, polyurethane emulsion, lauryl betaine, sodium alginate and sodium dodecyl sulfate.

7. An electrically conductive cashmere yarn comprising: the functional cashmere fiber is obtained by spinning the functional cashmere fiber and the conductive carbon fiber according to claim 5.

8. The conductive cashmere yarn of claim 7, wherein: the content of the conductive carbon fiber in the conductive cashmere yarn is 6-14 wt%.

9. Use of the conductive cashmere yarn of claim 7 in antistatic cashmere products.