CN107475803B - Preparation method of moisture-absorbing and sweat-releasing soft fiber and fiber obtained by preparation method - Google Patents
Preparation method of moisture-absorbing and sweat-releasing soft fiber and fiber obtained by preparation method Download PDFInfo
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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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/06—Wet spinning methods
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Abstract
The invention discloses a preparation method of moisture-absorbing and sweat-releasing soft fiber and the obtained fiber, belonging to the technical field of textile, and the steps comprise that kudzu root fiber spinning solution and pupa protein fiber spinning solution are mixed according to the mass ratio of (20-35): 70 blending, spinning, solidifying and post-processing. The moisture-absorbing and sweat-releasing soft fiber disclosed by the invention uses a natural polymer material as a raw material, has higher softness, comfort level, heat retention and water absorption, contains amino acid beneficial to human skin, and has the effect of caring skin; the moisture-absorbing and sweat-releasing soft fiber can be used for preparing fabrics of clothes for infants and pregnant women and fabrics of mooncoats with sensitive skin.
Description
Technical Field
The invention belongs to the technical field of textiles, and particularly relates to a preparation method of moisture-absorbing and sweat-releasing soft fibers and the fibers.
Background
The moisture absorption and sweat releasing textile is also called as moisture absorption and quick drying textile. The sweat on the skin is quickly guided to the outer surface of the fabric from the inner layer of the fabric and is diffused into the air, so that the skin layer is kept in a dry state all the time, and a human body feels comfortable. The moisture absorption and sweat releasing textile is mainly used for clothes such as sports wear, casual wear, underwear and the like. The existing moisture-absorbing and sweat-releasing textile mainly comprises a polyester moisture-absorbing and sweat-releasing fabric and a nylon moisture-absorbing and sweat-releasing fabric, because polyester and nylon fibers are synthetic high polymer materials, the comfortable sensation of natural materials cannot be replaced for people all the time, along with the improvement of the living standard of people, the environmental protection consciousness and the health consciousness are gradually enhanced, the natural materials are more and more loved for spinning clothes, and the textile is developed from a practical type to a beautified comfortable type.
China has 18 Pueraria plant varieties, is the most abundant in germplasm resources and is the top of the world. Millions of tons of kudzu vine root residues are produced every year according to million tons of kudzu vine root powder produced every year in China. At present, only a few radix puerariae residues are subjected to enzyme extraction to extract isoflavone and prepare dietary fiber, and most radix puerariae residues are discarded as waste. Because the quantity of the waste residues is large, the waste residues are easy to ferment and emit peculiar smell, and the environment of a construction site is seriously polluted. If the waste is changed into valuable, the resource utilization rate is improved, the environment is protected, the sources of textile raw materials can be widened, and the income of byproducts is increased.
Silkworm chrysalis has a medical history of more than one thousand years in China. Modern researches show that silkworm pupas have high nutritional value, and high-quality protein PC extracted from silkworm pupas is a protein compound consisting of 18 different amino acids. The content of 18 amino acids in PC is above 15mg/g, wherein serine, threonine, tryptophan, tyrosine, etc. are beneficial to human skin, and have special effect of caring skin. The titer of the silkworm pupa protein fiber is about 1.0-1.8dtex, and the silkworm pupa protein fiber has soft hand feeling like cashmere and smooth and fine hand feeling like real silk. According to the molecular structure, PC contains-COOH, -NH2 and-OH, cellulose contains-OH, and the cellulose is hydrophilic groups and contains natural moisturizing factors.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing moisture-absorbing and sweat-releasing soft fiber and the fiber obtained thereby.
The technical scheme of the invention is realized by the following method:
a preparation method of moisture-absorbing and sweat-releasing soft fibers comprises the following steps of mixing a kudzu root fiber spinning solution and a pupa protein fiber spinning solution according to a mass ratio of (20-35): 70 blending, spinning, solidifying and post-processing.
The invention also has the following additional technical features:
preferably, the preparation method of the moisture absorption and sweat releasing soft fiber comprises the following steps:
preparing a kudzu fiber spinning solution: washing radix Puerariae waste residue with water, drying, pulverizing, degumming, dewaxing, washing with water, filtering, decocting, bleaching, acid treating, squeezing, pulverizing, aging, yellowing, and filtering to obtain radix Puerariae fiber spinning solution;
preparing a protein fiber spinning solution: dissolving pupa protein powder in 10-18% by mass of sodium hydroxide aqueous solution, uniformly stirring, and filtering to obtain protein fiber spinning solution;
statically mixing the kudzu root fiber spinning solution and the protein fiber spinning solution, and then performing vacuum defoaming, spinning, solidification and post-treatment to obtain the kudzu root fiber spinning solution;
degumming: placing the crushed pueraria waste residue into a pectinase solution according to the mass ratio of (3-8) to the absolute dry pulp of 1, wherein the pectinase concentration is 5g/L, the pH value is adjusted to 3.5 by acetic acid, the temperature is 40 ℃, and the time is 4 hours;
dewaxing: adding the kudzu vine root residues into absolute ethyl alcohol according to the absolute dry mass ratio of 1:5-20, and oscillating in an oscillator at the speed of 300r/min at the temperature of 60 ℃ for 60-200 min;
and (3) cooking: placing the filtered radix puerariae residues into a sodium hydroxide solution with the mass fraction of 8-15% according to the mass ratio of the oven dry pulp of 1:10, wherein the temperature is 90-100 ℃, and the time is 150-; bleaching: adding radix Puerariae residue at oven dry weight ratio of 1:5-20 into 2.5% hypochlorous acid water solution at 40 deg.C for 60 min;
acid treatment: adding the kudzu vine root residues into a 3% sulfuric acid aqueous solution according to the oven-dry weight mass ratio of 1:5, wherein the temperature is 40 ℃, the temperature is normal temperature, and the time is 60 min;
squeezing: 30 plus or minus 0.5 percent of alpha fiber and 14 plus or minus 0.5 percent of sodium hydroxide;
aging: the temperature is 18 ℃;
yellowing: initial temperature 15 ℃, final temperature 27 ℃, vacuum degree: 0.9bar below zero, after nitrogen charging, the vacuum degree is 0.8bar below zero, the final vacuum degree is 0.2bar below zero, the time is 60min, the adding amount of CS2 is 34.5 percent of the mass of the alpha-cellulose, and the temperature of the solution is 4 ℃;
spinning: according to the conventional wet spinning and spinning process, the spinning solution is metered by a metering pump, enters a candle filter, is pressed into a spinning nozzle and enters a coagulating bath, the diameter of the spinning nozzle is 0.1mm, the spraying speed of the spinning nozzle is 50-60m/min, the spinning temperature is 60-70 ℃, and the spinning solution is stretched according to the fineness of fibers; (ii) a
The coagulation bath consists of: 120g/L of sulfuric acid 100-;
and (3) post-treatment: and cutting, drying and packaging the solidified fiber bundle.
Preferably, sodium hydroxymethyl cellulose with the mass of 0.05-0.1 of pupa protein powder is also added in the process of preparing the protein fiber spinning solution.
The fiber can be used for preparing pajamas fabric, sports clothes fabric, maternity clothes fabric, confinement clothes fabric, children clothes fabric and casual clothes fabric.
The invention also provides a fiber prepared by the method.
The invention has the following advantages:
the moisture-absorbing and sweat-releasing soft fiber disclosed by the invention uses a natural polymer material as a raw material, has high softness, comfort level, heat retention and water absorption, contains amino acid beneficial to human skin, and has the effect of caring skin.
The moisture-absorbing and sweat-releasing soft fiber can be used for preparing fabrics of clothes for infants and pregnant women and fabrics of clothes for months and children with sensitive skin, and because the basic temperature of the pregnant women and the infants is higher, the body temperature of the infants is easy to fluctuate, women in the month period are easy to sweat, the three are easy to sweat, and the fiber can keep the skin dry and comfortable for a long time, is soft and comfortable in touch feeling of the skin and has certain warmth retention property for the infants.
The moisture absorption and sweat releasing soft fiber provided by the invention selects the kudzu root residues as raw materials, so that the serviceability of the moisture absorption and sweat releasing fiber is ensured, the production cost is reduced, the utilization rate of waste resources is improved, the environmental protection pressure is reduced, the source of textile raw materials is widened, and the variety of textile products is enriched.
Detailed Description
The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.
Example 1
A method for preparing moisture absorption and sweat releasing soft fiber comprises the following steps:
preparing a protein fiber spinning solution: dissolving pupa protein powder in a sodium hydroxide aqueous solution with the mass fraction of 13%, adding sodium hydroxymethyl cellulose with the mass of 0.05 of the pupa protein powder, uniformly stirring, and filtering to obtain a protein fiber spinning solution;
preparing a kudzu fiber spinning solution:
washing with water: washing the pueraria waste residue with water to remove impurities such as soil, residual pueraria powder and the like;
and (3) drying: airing or drying;
crushing: pulverizing into 80 mesh powder;
degumming: placing the crushed pueraria waste residue into a pectinase solution according to the mass ratio of absolute dry pulp of 1:5, wherein the pectinase concentration is 5g/L, the pH value is adjusted to 3.5 by acetic acid, the temperature is 40 ℃, and the time is 4 hours;
directly filtering and drying after degumming;
dewaxing: adding the kudzu vine root residues into absolute ethyl alcohol according to the absolute dry weight mass ratio of 1:10, and oscillating in an oscillator at the speed of 250r/min at the temperature of 60 ℃ for 100 min;
washing with water to neutrality and filtering;
and (3) cooking: placing the filtered radix puerariae residue into a sodium hydroxide solution with the mass fraction of 10% according to the mass ratio of the oven-dried pulp of 1:10, and keeping the temperature at 95 ℃ for 160 min; bleaching: adding radix Puerariae residue into 2.5% hypochlorous acid water solution at 40 deg.C for 60min according to the oven dry weight ratio of 1: 10;
acid treatment: adding the kudzu vine root residues into a 3% sulfuric acid aqueous solution according to the oven-dry weight mass ratio of 1:5, wherein the temperature is 40 ℃, the temperature is normal temperature, and the time is 60 min;
squeezing: 30.5 percent of alpha fiber and 14 percent of sodium hydroxide;
crushing;
aging: the temperature is 18 ℃;
yellowing: initial temperature 15 ℃, final temperature 27 ℃, vacuum degree: 0.9bar below zero, after nitrogen charging, the vacuum degree is 0.8bar below zero, the final vacuum degree is 0.2bar below zero, the time is 60min, the adding amount of CS2 is 34.5 percent of the mass of the alpha-cellulose, and the temperature of the solution is 4 ℃;
filtering;
and mixing the kudzu root fiber spinning solution and the protein fiber spinning solution obtained in the above steps according to a mass ratio of 30: 70, static mixing and then vacuum defoaming;
spinning: according to the conventional wet spinning and spinning process, the spinning solution is metered by a metering pump, enters a candle filter, is pressed into a spinning nozzle and enters a coagulating bath, the diameter of the spinning nozzle is 0.05mm, the spraying speed of the spinning nozzle is 50m/min, the spinning temperature is 60 ℃, and the spinning solution is stretched according to the fineness of fibers;
the coagulation bath consists of: 100g/L of sulfuric acid, 300g/L of sodium sulfate, 15g/L of zinc sulfate and 10g/L of aluminum sulfate, and the temperature is 50 ℃;
and (3) post-treatment: and cutting, drying and packaging the solidified fiber bundle.
Example 2
A method for preparing moisture absorption and sweat releasing soft fiber comprises the following steps:
preparing a protein fiber spinning solution: dissolving pupa protein powder in 18 mass percent sodium hydroxide aqueous solution, adding sodium carboxymethylcellulose with the mass of 0.1 of the pupa protein powder, uniformly stirring, and filtering to obtain protein fiber spinning solution;
preparing a kudzu fiber spinning solution:
washing with water: washing the pueraria waste residue with water to remove impurities such as soil, residual pueraria powder and the like;
and (3) drying: airing or drying;
crushing: pulverizing into 80 mesh powder;
degumming: placing the crushed pueraria waste residue into a pectinase solution according to the mass ratio of absolute dry pulp of 1:3, wherein the pectinase concentration is 5g/L, the pH value is adjusted to 3.5 by acetic acid, the temperature is 40 ℃, and the time is 4 hours;
dewaxing: adding the kudzu vine root residues into absolute ethyl alcohol according to the absolute dry weight mass ratio of 1: 20, and oscillating in an oscillator at the speed of 280r/min at the temperature of 60 ℃ for 200 min;
washing with water to neutrality and filtering;
and (3) cooking: placing the filtered radix Puerariae residue in 15% sodium hydroxide solution at 100 deg.C for 150min according to the mass ratio of oven dry pulp of 1: 10; bleaching: adding radix Puerariae residue at oven dry weight ratio of 1:9 into 2.5% hypochlorous acid water solution at 40 deg.C for 60 min;
acid treatment: adding the kudzu vine root residues into a 3% sulfuric acid aqueous solution according to the oven-dry weight mass ratio of 1:5, wherein the temperature is 40 ℃, the temperature is normal temperature, and the time is 60 min;
squeezing: 30.4 percent of alpha fiber and 14.2 percent of sodium hydroxide;
crushing;
aging: the temperature is 18 ℃;
yellowing: initial temperature 15 ℃, final temperature 27 ℃, vacuum degree: 0.9bar below zero, after nitrogen charging, the vacuum degree is 0.8bar below zero, the final vacuum degree is 0.2bar below zero, the time is 60min, the adding amount of CS2 is 34.5 percent of the mass of the alpha-cellulose, and the temperature of the solution is 4 ℃;
filtering;
statically mixing the kudzu root fiber spinning solution and the protein fiber spinning solution obtained in the above steps according to a mass ratio of 20: 70 mixing and then carrying out vacuum defoaming;
spinning: according to the conventional wet spinning and spinning process, the spinning solution is metered by a metering pump, enters a candle filter, is pressed into a spinning nozzle and enters a coagulating bath, the diameter of the spinning nozzle is 0.1mm, the spraying speed of the spinning nozzle is 60m/min, the spinning temperature is 60 ℃, and the spinning solution is stretched according to the fineness of fibers;
the coagulation bath consists of: 120g/L of sulfuric acid, 300g/L of sodium sulfate, 13g/L of zinc sulfate and 13g/L of aluminum sulfate, and the temperature is 50 ℃;
and (3) post-treatment: and cutting, drying and packaging the solidified fiber bundle.
Example 3
A method for preparing moisture absorption and sweat releasing soft fiber comprises the following steps:
preparing a protein fiber spinning solution: dissolving pupa protein powder in 10% sodium hydroxide aqueous solution, adding sodium hydroxymethyl cellulose with the mass of 0.07 of the pupa protein powder, uniformly stirring, and filtering to obtain protein fiber spinning solution;
preparing a kudzu fiber spinning solution:
washing with water: washing the pueraria waste residue with water to remove impurities such as soil, residual pueraria powder and the like;
and (3) drying: airing or drying;
crushing: pulverizing into 200 mesh powder;
degumming: placing the crushed pueraria waste residue into a pectinase solution according to the mass ratio of absolute dry pulp of 1:8, wherein the pectinase concentration is 5g/L, the pH value is adjusted to 3.5 by acetic acid, the temperature is 40 ℃, and the time is 4 hours;
dewaxing: adding the kudzu vine root residues into absolute ethyl alcohol according to the absolute dry weight mass ratio of 1:15, and oscillating in an oscillator at the speed of 230r/min at the temperature of 60 ℃ for 100 min;
washing with water to neutrality and filtering;
and (3) cooking: placing the filtered radix Puerariae residue in 10% sodium hydroxide solution at 90 deg.C for 150min according to the mass ratio of oven dry pulp of 1: 10; bleaching: adding radix Puerariae residue into 2.5% hypochlorous acid water solution at 40 deg.C for 60min according to the oven dry weight ratio of 1: 15;
acid treatment: adding the kudzu vine root residues into a 3% sulfuric acid aqueous solution according to the oven-dry weight mass ratio of 1:5, wherein the temperature is 40 ℃, the temperature is normal temperature, and the time is 60 min;
squeezing: 29.8 percent of alpha fiber and 14.3 percent of sodium hydroxide;
crushing;
aging: the temperature is 18 ℃;
yellowing: initial temperature 15 ℃, final temperature 27 ℃, vacuum degree: 0.9bar below zero, after nitrogen charging, the vacuum degree is 0.8bar below zero, the final vacuum degree is 0.2bar below zero, the time is 60min, the adding amount of CS2 is 34.5 percent of the mass of the alpha-cellulose, and the temperature of the solution is 4 ℃;
filtering;
and (2) mixing the obtained kudzu root fiber spinning solution and protein fiber spinning solution according to a mass ratio of 20: 70, statically mixing, and then standing and defoaming in vacuum at the temperature of 50 ℃ to obtain defoaming solution with the viscosity of 43 s;
spinning: according to the conventional wet spinning and spinning process, the spinning solution is metered by a metering pump, enters a candle filter, is pressed into a spinning nozzle and enters a coagulating bath, the diameter of the spinning nozzle is 0.1mm, the spraying speed of the spinning nozzle is 55m/min, the spinning temperature is 60 ℃, and the spinning solution is stretched according to the fineness of fibers;
the coagulation bath consists of: 110g/L of sulfuric acid, 280g/L of sodium sulfate, 15g/L of zinc sulfate and 10g/L of aluminum sulfate at the temperature of 60 ℃;
and (3) post-treatment: and cutting, drying and packaging the solidified fiber bundle.
Example 4
A method for preparing moisture absorption and sweat releasing soft fiber comprises the following steps:
preparing a protein fiber spinning solution: dissolving pupa protein powder in a sodium hydroxide aqueous solution with the mass fraction of 12%, adding sodium hydroxymethyl cellulose with the mass of 0.091 of the pupa protein powder, uniformly stirring, and filtering to obtain a protein fiber spinning solution;
preparing a kudzu fiber spinning solution:
washing with water: washing the pueraria waste residue with water to remove impurities such as soil, residual pueraria powder and the like;
and (3) drying: airing or drying;
crushing: pulverizing into 100 mesh powder;
degumming: placing the crushed pueraria waste residue into a pectinase solution according to the mass ratio of absolute dry pulp of 1:6, wherein the pectinase concentration is 5g/L, the pH value is adjusted to 3.5 by acetic acid, the temperature is 40 ℃, and the time is 4 hours;
dewaxing: adding the kudzu vine root residues into absolute ethyl alcohol according to the absolute dry weight mass ratio of 1:10, and oscillating in an oscillator at the speed of 300r/min at the temperature of 60 ℃ for 200 min;
washing with water to neutrality and filtering;
and (3) cooking: placing the filtered radix Puerariae residue in 15% sodium hydroxide solution at 100 deg.C for 150min according to the mass ratio of oven dry pulp of 1: 10; bleaching: adding radix Puerariae residue into 2.5% hypochlorous acid water solution at 40 deg.C for 60min according to the oven dry weight ratio of 1: 10;
acid treatment: adding the kudzu vine root residues into a 3% sulfuric acid aqueous solution according to the oven-dry weight mass ratio of 1:5, wherein the temperature is 40 ℃, the temperature is normal temperature, and the time is 60 min;
squeezing: 30.5 percent of alpha fiber and 13.5 percent of sodium hydroxide;
crushing;
aging: the temperature is 18 ℃;
yellowing: initial temperature 15 ℃, final temperature 27 ℃, vacuum degree: 0.9bar below zero, after nitrogen charging, the vacuum degree is 0.8bar below zero, the final vacuum degree is 0.2bar below zero, the time is 60min, the adding amount of CS2 is 34.5 percent of the mass of the alpha-cellulose, and the temperature of the solution is 4 ℃;
filtering;
and (3) mixing the obtained kudzu root fiber spinning solution and protein fiber spinning solution according to a mass ratio of 23: 70, static mixing and then vacuum defoaming;
spinning: according to the conventional wet spinning and spinning process, the spinning solution is metered by a metering pump, enters a candle filter, is pressed into a spinning nozzle and enters a coagulating bath, the diameter of the spinning nozzle is 0.1mm, the spraying speed of the spinning nozzle is 50m/min, the spinning temperature is 60 ℃, and the spinning solution is stretched according to the fineness of fibers;
the coagulation bath consists of: 110g/L of sulfuric acid, 290g/L of sodium sulfate, 15g/L of zinc sulfate and 15g/L of aluminum sulfate, and the temperature is 50 ℃;
and (3) post-treatment: and cutting, drying and packaging the solidified fiber bundle.
Comparative example 1
Moisture-absorbing and sweat-releasing soft fibers were prepared according to the method in example 1, the degumming step was removed in the preparation of the pueraria lobata spinning solution, and the other parts were the same.
Comparative example 2
Moisture-absorbing and sweat-releasing soft fibers were prepared according to the method of example 1, and the dewaxing step was removed in the preparation of the pueraria lobata spinning solution, and the other portions were the same.
Comparative example 3
The moisture-absorbing and sweat-releasing soft fiber is prepared according to the method in the example 1, sodium carboxymethyl cellulose is not used in the preparation process of the pupa protein spinning solution, and other parts are the same.
Test example 1 fracture Strength test
As can be seen from table 1, the breaking strength of the fiber was greatly affected without degumming and dewaxing in the preparation process of the pueraria lobata spinning solution, while the breaking strength was not affected by the absence of sodium carboxymethylcellulose in the preparation process of the protein spinning solution in comparative example 3. In addition, the whiteness is affected by degumming and dewaxing, and the spinneret orifices are easily blocked by degumming and dewaxing and uneven spinning fineness is caused in terms of spinning effect.
Test example 2 moisture absorption and diffusion test (1) fibers were woven into a fabric according to a plain weave method, and 5 test pieces, each having a size of 10cm × 10cm, were cut out from each sample to be flat and wrinkle-free. And (2) placing the sample in a standard atmospheric condition to regulate the humidity balance. And (3) placing the sample on a test bed, sucking about 0.2 ml of water and gently dripping the water on the sample, wherein the caliber of a dropper is not more than 1cm away from the surface of the sample. (4) carefully observing the spreading of the water drop, and recording the time required for the water drop to contact the surface of the inner layer of the sample until the water drop fully infiltrates and spreads (no longer presents specular reflection) to the outer layer, which is as accurate as 0.1 s. If the water droplets spread slowly and do not spread completely after a certain time (e.g., 300s), the test can be stopped and the diffusion time recorded as being greater than the set time (e.g., 300 s). The method is very simple and intuitive, and an observer can judge the moisture absorption and diffusion performance of the water drop from the time required for the water drop to contact the inner layer surface of the sample and completely permeate and diffuse to the outer layer. The shorter the water drop spreading time, the better the moisture absorption spreading performance. For comparison, the cotton cloth with the best moisture absorption effect in the natural fiber fabric is selected for comparison, and the cotton cloth is plain woven. The test results are shown in Table 2.
Table 2 shows that, in the preparation process of the pueraria lobata spinning solution, the hygroscopicity of the cloth is greatly influenced by the non-degumming and non-dewaxing processes, because the pueraria lobata residues contain colloids and waxiness, the hygroscopicity is influenced, the spinneret holes are easily blocked by the uneven spinning solution in the spinning process, and the hygroscopicity of the cloth is greatly influenced by the non-addition of sodium carboxymethylcellulose in the preparation process of the pupa protein spinning solution.
Test example 3 softness test
(1) According to the plain weave method, the fiber is woven into the fabric, 5 samples are cut from each sample, the size of each sample is 1cm multiplied by 10cm, the samples are flat and have no wrinkles, and cotton cloth which is plain weave is cut for comparison.
(2) A2 cm-high wood board is placed on a horizontal desktop, a sample is placed on the wood board, one end of the sample extends out of the wood board, the extending length of the sample is adjusted until the extending end of the sample is in regular contact with the desktop, the horizontal distance from a contact line to the wood board, namely the distance from the fabric extending amount to the wood board, is measured, and the shorter the distance is, the better the fabric flexibility is.
Table 3 shows that in the preparation process of the pueraria lobata spinning solution, the softness of the finally woven fabric is affected without degumming or dewaxing, and compared with the soft cotton cloth in the fabric, the fiber fabric is obviously softer, so that the wearing comfort is ensured, and the softness is not greatly affected by adding sodium carboxymethyl cellulose.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. The moisture-absorbing and sweat-releasing soft fiber is characterized in that the preparation method comprises the following steps of mixing a kudzu root fiber spinning solution and a pupa protein fiber spinning solution according to a mass ratio of (20-35): 70 blending, spinning, solidifying and post-treating to obtain the product;
the method specifically comprises the following steps:
preparing a kudzu fiber spinning solution: washing radix Puerariae waste residue with water, drying, pulverizing, degumming, dewaxing, washing with water, filtering, decocting, bleaching, acid treating, squeezing, pulverizing, aging, yellowing, and filtering to obtain radix Puerariae fiber spinning solution;
preparing a protein fiber spinning solution;
statically mixing the kudzu root fiber spinning solution and the protein fiber spinning solution, and then performing vacuum defoaming, spinning, solidification and post-treatment to obtain the kudzu root fiber spinning solution;
degumming: placing the crushed pueraria waste residue into a pectinase solution according to the mass ratio of (3-8) to the absolute dry pulp of 1, wherein the pectinase concentration is 5g/L, the pH value is adjusted to 3.5 by acetic acid, the temperature is 40 ℃, and the time is 4 hours;
dewaxing: adding the kudzu vine root residues into absolute ethyl alcohol according to the absolute dry mass ratio of 1:5-20, and oscillating in an oscillator at the speed of 300r/min at the temperature of 60 ℃ for 60-200 min;
and (3) cooking: placing the filtered radix puerariae residues into a sodium hydroxide solution with the mass fraction of 8-15% according to the mass ratio of the oven dry pulp of 1:10, wherein the temperature is 90-100 ℃, and the time is 150-; bleaching: adding radix Puerariae residue at oven dry weight ratio of 1:5-20 into 2.5% hypochlorous acid water solution at 40 deg.C for 60 min;
acid treatment: adding the kudzu vine root residues into a 3% sulfuric acid aqueous solution according to the oven-dry weight mass ratio of 1:5, wherein the temperature is 40 ℃, the temperature is normal temperature, and the time is 60 min;
squeezing: 30 plus or minus 0.5 percent of alpha fiber and 14 plus or minus 0.5 percent of sodium hydroxide;
aging: the temperature is 18 ℃;
yellowing: initial temperature 15 ℃, final temperature 27 ℃, vacuum degree: 0.9bar below zero, after nitrogen charging, the vacuum degree is 0.8bar below zero, the final vacuum degree is 0.2bar below zero, the time is 60min, the adding amount of CS2 is 34.5 percent of the mass of the alpha-cellulose, and the temperature of the solution is 4 ℃;
spinning: according to the conventional wet spinning and spinning process, the spinning solution is metered by a metering pump and then enters a candle filter and is pressed into a spinning nozzle to enter a coagulating bath;
the coagulation bath consists of: 120g/L of sulfuric acid 100-;
and (3) post-treatment: cutting, drying and packaging the solidified fiber bundle;
the preparation of the protein fiber spinning solution is specifically to dissolve pupa protein powder into a sodium hydroxide aqueous solution with the mass fraction of 10-18%, uniformly stir and filter to obtain the protein fiber spinning solution;
sodium hydroxymethyl cellulose with the mass of 0.05-0.1 of pupa protein powder is also added in the process of preparing the protein fiber spinning solution;
the diameter of the spinning nozzle in the spinning process is 0.05-0.1mm, the spraying speed of the spinning nozzle is 50-60m/min, and the spinning temperature is 60-70 ℃.
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