CN113652866A

CN113652866A - Cashmere blend fiber containing copper ammonia fiber and preparation method thereof

Info

Publication number: CN113652866A
Application number: CN202111134813.6A
Authority: CN
Inventors: 薛惊理; 陈慧; 张翼; 金国标
Original assignee: Jiangnan Zhizaofu Ningbo Thread Industry Co ltd
Current assignee: Jiangnan Zhizaofu Ningbo Thread Industry Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-11-16

Abstract

The invention provides a cashmere blend fiber containing copper ammonia fiber and a preparation method thereof, belonging to the technical field of textile. The method for producing the cashmere blended fiber containing the copper ammonia fiber is characterized by comprising the following steps of: preparing raw materials, blending, gilling, combing, rebinning, pre-spinning, roving, spinning, yarn steaming, spooling, doubling, double twisting, secondary yarn steaming, rewinding, packaging and inspecting finished yarn. The blended fiber has good smoothness and color rendering property. In addition, the fabric prepared from the blended fiber has good color rendering property, drapability, smoothness, moisture permeability and antistatic property.

Description

Cashmere blend fiber containing copper ammonia fiber and preparation method thereof

Technical Field

The invention relates to the technical field of spinning, in particular to a cashmere blend fiber containing copper and ammonia fibers and a preparation method thereof.

Background

Among chemical fibers, viscose fiber was an important representative of regenerated fiber in the past 70 s of the last century and was the first chemical fiber to be developed and put into industrial use. However, since the production process of viscose fiber has serious environmental pollution, the annual yield of viscose fiber is continuously reduced, and then natural cellulose fiber is paid attention again. Copper ammonia fiber has good moisture absorption and wearing comfort, so that copper ammonia fiber as a cellulose fiber is one of textile raw materials which are gradually seen by people.

Cuprammonium is a regenerated fiber cuprammonium filament, which is obtained from the fluff around cotton seeds, 100% cellulose fiber. Because the fiber is fine and soft and has proper luster, the fiber is usually used as high-grade silk fabric or knitted fabric. The clothing has the advantages of excellent wearability, good hygroscopicity, extremely draping feeling, and wearability similar to silk, and conforms to the trend of environmental protection clothing. Cuprammonium fibers are expensive, have four functions of breathing, refreshing, antistatic and good drapability, have the most attractive characteristics of moisture absorption and desorption, and belong to breathing and refreshing fibers. The application of the cuprammonium rayon is almost the same as that of the viscose rayon, but the monofilament of the cuprammonium rayon is thinner than that of the viscose rayon, the wearability of the product is excellent, the performance is similar to that of silk, and the product has extremely drape feeling. In addition, the antistatic underwear fabric has a good antistatic function, has a good touch even if being worn in a dry area, can avoid the sultry discomfort, is an important reason for becoming popular underwear lining, and is still in an irreplaceable position until now.

Cashmere is one of precious natural raw materials for textile, and is known as the king of animal fibers by its own characteristics of lightness, softness, smoothness, glutinousness and the like, also known as 'soft gold'. The pure cashmere products processed by cashmere have unique styles of comfortable wearing, strong heat retention, plump suede, soft and smooth hand feeling and soft luster, and are deeply popular with consumers. The copper ammonia fiber is an environment-friendly ecological raw material, is blended with cashmere which is known as 'fiber precious stone' and 'soft gold', not only keeps the characteristics of good luster and soft hand feeling of cashmere products, but also has the good service performances of unique moisture absorption and permeability, antistatic property and the like of the copper ammonia fiber, and along with the continuous improvement of the consumption level of people, the plush blended product clothing is obviously developed towards high-count, high-density, light and thin type directions.

Disclosure of Invention

The invention aims to provide a cashmere blend fiber containing copper ammonia fibers and having good drapability, smoothness and color rendering property, moisture permeability and antistatic property and a preparation method thereof.

A method for treating cashmere adopts wool oil, antistatic agent and methyl solution of hydramethylnon to treat cashmere.

Preferably, the weight ratio of the wool oil, the antistatic agent and the methyl solution of the hydramethylnon is 1-3:2-6: 1-3.

The invention also discloses the application of the hydramethylnon solution in treating cashmere fibers.

The invention also discloses a method for preparing the cashmere blend fiber containing the copper ammonia fiber, which comprises the following steps:

preparing raw materials, blending wool, carding, gilling, combing, rebinning, pre-spinning, roving, spinning, yarn steaming, spooling, doubling, double twisting, secondary yarn steaming, rewinding, packaging and inspecting finished yarn; wherein the mixing step comprises:

treating copper ammonia fiber with antistatic agent;

treating cashmere by the treatment method of claim 1 or 2;

preferably, the raw material preparation step selects the following raw materials: the length of the copper ammonia cotton is 32-40mm, the fineness is 10-15 mu m, and the moisture regain is 10-15%; the middle length of cashmere is 32-40mm, the fineness is 12-18 mu m, and the moisture regain is 13-19%.

Preferably, the specific steps of blending the hairs include:

treating copper ammonia fiber with antistatic agent;

treating cashmere fibers by using wool oil, an antistatic agent and a hydramethylnon solution;

and mixing the treated copper ammonia fibers and the treated cashmere fibers.

More preferably, the specific steps of blending the wool include:

treating the copper ammonia fiber by using an antistatic agent and a genkwanin furfuryl alcohol mixture;

and mixing the treated copper ammonia fibers and the treated cashmere fibers.

Preferably, the weight ratio of the antistatic agent to the genkwanin furfuryl alcohol mixture is 2-4: 1.

More preferably, the wool blending requires the operation of a transverse paving and straight taking method, namely a cotton blending mode that transverse paving is carried out on an automatic cotton blending machine through a swinging hopper, and a fillet nail curtain vertically grabs fibers. The method can reduce yarn defects such as uneven mixing caused by uneven mixing.

More preferably, the two materials are mixed and the blended material is opened. Can avoid the phenomenon that the wool is wound by a cylinder of the carding machine due to too much moisture absorption of the silk, and the fiber is kneaded and tangled together and can not be completely loosened to generate neps.

Preferably, the gauge of the needle comb is 30-35mm, and the strip discharging speed is 40-45 m/min. The distance can avoid a large amount of neps generated by mutually rubbing the fibers and can also avoid the increase of hair grains caused by the damage and the snapping of the fibers.

Preferably, in the roving treatment, the gauge is 21-27mm in the front region and 28-35mm in the rear region. Is favorable for reducing broken ends and static electricity phenomena.

Preferably, in the spinning treatment, the gauge is 21-30mm in the front area and 27-36mm in the rear area; the twist multiplier 110-. The yarn evenness can be improved, the generation of coarse and fine yarn can be reduced, and the soft hand feeling of the yarn can be ensured.

More preferably, the cashmere blend fiber containing copper ammonia fiber and the preparation method thereof comprise the following steps:

1. raw material preparation

The selection criteria of the copper ammonia fiber are as follows: the length is 35-40mm, the fineness is 12-13 mu m, the moisture regain is 10-15%, and the cashmere selection standard is as follows: the middle length is 34.5-35.5mm, the fineness is 15.5-16 mu m, and the moisture regain is 13-19%.

2. And wool

Opening the copper ammonia fiber, adding an antistatic agent, and preserving for 24 hours; adding crude oil into cashmere, and maintaining for 24h to allow the crude oil to be fully permeated and absorbed. The method is operated according to a 'transverse paving and direct taking' method, namely, on an automatic cotton mixer, transverse paving is carried out through a swinging hopper, after a horn nail curtain vertically grabs a cotton mixing mode of fibers and wool mixing, the two raw materials are mixed, and the mixed raw materials are in an opening state.

3. Needle comb

The distance between the cylinder and the cover plate is preferably small, the phenomenon that the distance is too large, fibers rub each other to generate a large amount of neps is avoided, meanwhile, the length of cashmere is considered, the distance cannot be too small, otherwise, the fibers are easy to damage, break and increase the content of short fibers, so that the number of hair particles is increased, and meanwhile, the speed of the doffer and the cylinder is reduced.

As the lengths of the silk and the cashmere are shorter, the needle comb gauge is required to be as small as possible, 30-35mm is selected, the speed is required to be low, and the sliver discharging speed is 40-45 m/min. After the two needles are finished with the oil and water and placed for 12-18 hours, the two needles are put on the machine and put off the machine to prevent the generation of coarse grains.

4. Combing

The biggest problem of combing is that the combing machine has large dropping short rate and more neps, and the space of the combing machine needs to be reasonably selected. The density of the circular carding needle plate is increased to achieve the purpose of removing fine cotton particles, and the fiber damage is reduced as much as possible by adopting small combination, small drafting, low speed and small feeding. The vehicle speed is selected to be 120-.

5. Composite comb

The parallel straightness of the combed fibers is greatly improved, but the cohesion of the fibers is poor, the re-combing rubber rollers are treated by coatings with good antistatic effect, the smoothness is improved, the less rubber rollers are used for carrying out knurling and winding, and the lower machine wool tops are controlled to be 22 g/m.

6. Front spinning

The fore-spinning process controls the weight of the produced sliver and the uneven weight, and prevents the heavy belly yarn. The specific operation is that the feed amount of one needle in the fore-spinning process is 90-110g/m, the drafting is 3-6 times, the gauge length is 26-30mm, the sliver output weight is 18-25g/m, and the unevenness rate is less than 2%. The sliver weight is 3-8g/m through two-needle and three-needle drafting, the sliver is 2-6g/m through four front-spinning needles, and the unevenness rate is less than 2%.

7. Roving treatment

The rough yarn reduces the rough details as much as possible, avoids accidental extension in the drafting process, increases the pressure reduction speed and reduces the phenomena of broken ends and static electricity. The length of the fiber in the blended strip is discrete greatly, the distance is proper, the front area is 21-27mm, and the back area is 28-35 mm. And obtaining 0.2-0.4g/m of roving sliver after the roving process drafting.

8. Spun yarn treatment

In order to improve the uniformity of the yarn and reduce the generation of coarse details, the front area of the yarn space is 21-30mm, the rear area is 27-36mm, the twist coefficient of the yarn is selected to ensure the strength and the elongation of the yarn and also ensure the soft hand feeling of the yarn, the twist coefficient is 110-.

9. Yarn steaming machine

Moisture regain is changed through yarn steaming, and uniform humidification is achieved, so that fiber static electricity is reduced. The yarn steaming is carried out by adopting double circulation, the first circulation lasts for 3-8min at the temperature of 75-85 ℃, and the second circulation lasts for 35-45min at the temperature of 75-85 ℃.

10. Spooling and doubling

The yarn cleaner channel is reasonably selected according to the quality of the yarn, harmful yarn defects are cut off as much as possible, the joint quality of the knotter is improved, the tension of the finished yarn is ensured to be consistent, and small discriminators are not generated. And the speed is controlled at 360-390m/min during the doubling.

11. Two-for-one twisting

The two-for-one twister is to ensure the consistent tension of the spindle tape disc, reduce the uneven twist and improve the yarn quality. The specific parameters of the two-for-one twisting process are 5400-5500r/min of vehicle speed, 410-430T/M of designed twist, 3# of tension bead, and 3-S twisting direction of tension guide wheel.

12. Secondary yarn steaming

Adopts double circulation, the first circulation lasts for 3-8min at 75-85 ℃, and the second circulation lasts for 45-55min at 75-85 ℃.

13. Rewinding, packaging and finished yarn inspection

Further preferably, the step 2 and the wool comprise the following steps:

opening the copper ammonia fiber, adding an antistatic agent, and preserving for 24 hours; adding crude oil, an antistatic agent and a hydramethylnon solution into cashmere, and maintaining for 24h to ensure that the crude oil and the antistatic agent are fully permeated and absorbed. The method is operated according to a 'transverse paving and direct taking' method, namely, on an automatic cotton mixer, transverse paving is carried out through a swinging hopper, after a horn nail curtain vertically grabs a cotton mixing mode of fibers and wool mixing, the two raw materials are mixed, and the mixed raw materials are in an opening state. The methylol solution of hydramethylnone hydrazone can improve the color rendering property of the fiber, thereby increasing the dye uptake of the blended fiber.

Further preferably, the step 2 and the wool comprise the following steps:

opening the copper ammonia fiber, adding an antistatic agent and a genkwanin furfuryl alcohol mixture, and preserving health for 24 hours; adding crude oil, an antistatic agent and a hydramethylnon solution into cashmere, and maintaining for 24h to ensure that the crude oil and the antistatic agent are fully permeated and absorbed. The method is operated according to a 'transverse paving and direct taking' method, namely, on an automatic cotton mixer, transverse paving is carried out through a swinging hopper, after a horn nail curtain vertically grabs a cotton mixing mode of fibers and wool mixing, the two raw materials are mixed, and the mixed raw materials are in an opening state. The treatment of the cuprammonium rayon with the daphnetin furfuryl alcohol mixture is beneficial to improving the smoothness of the fibers, and further improving the smoothness of the blended fibers, so that the static friction coefficient of the blended fibers is less than 9.5.

The invention also discloses the cashmere blend fiber containing the copper ammonia fiber prepared by the method.

Preferably, the finished product index of the blended fiber is as follows:

evenness CV%: 11 to 12 percent; kilometer details: 5-8; kilometer nubs: 28-32; and (3) knotting the kilometers of cotton: 30-35; number deviation: 0.2 to 0.5 percent; weight CV%: 0.5-1.5%; moisture regain%: 10 to 12 percent; twist degree: 1000-1010T/M; twist CV%: 2 to 4 percent; yarn strength: 500-510 CN; the breaking strength is 16-18 CN/TEX; strength CV%: 3 to 5 percent; percent elongation: 6 to 9 percent.

Preferably, the dye uptake of the blend fiber is > 84%, and the K/S value is > 7.05.

Compared with the prior art, the invention has the beneficial effects that:

the blended fiber has good smoothnessThe copper ammonia fiber has a circular section and a soft and smooth surface, is blended with cashmere, is comfortable to wear, and has a static friction coefficient of less than 12.43 and a minimum value of 9.32; the blended fiber also has good color rendering, and the dye uptake is above 84.77 and can reach 91.02% at most. The fabric prepared from the blended fiber has good drapability due to the copper ammonia fiber, the static drapability coefficient is below 16.402 and is 16.279 as the lowest, and the dynamic drapability coefficient is below 21.33 and is 21.07 as the lowest; the fabric prepared from the blended fiber has good moisture permeability, the moisture permeability is more than 272, and the maximum moisture permeability can reach 277 g/(m)²h) Therefore, the wearing feeling of the comfortable piece is achieved; the fabric prepared from the blended fiber has good antistatic property, and in an antistatic test, the electrostatic voltage of the fabric is less than 1142 and is 1127v at the minimum, and the half-life period is less than 7.41 and is 7.21s at the minimum, so that phenomena of static electricity, dust adsorption and the like generated during uncomfortable winding and putting on and off can be eliminated.

Drawings

FIG. 1 shows the results of a fabric moisture permeability test;

fig. 2 shows the results of the fabric drape test.

Detailed Description

The exemplary embodiments will be described herein in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The experimental procedures in the following examples are, unless otherwise specified, either conventional or according to the manufacturer's recommendations. Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

In the following examples, the crude oil and the antistatic agent are purchased from Beijing Sphinger auxiliary agent Co., Ltd, and the product types are as follows: and crude oil FX-906; antistatic FX-AS 301.

Example 1

The preparation of the blend fiber comprises the following steps:

1. raw material preparation

The length of the copper ammonia cotton is 38mm, the fineness is 13 mu m, the moisture regain is 12.95%, the middle length of the cashmere is 35mm, the fineness is 15.58 mu m, and the moisture regain is 16%. The copper ammonia fiber accounts for 10 percent, and the cashmere accounts for 90 percent.

2. And wool

Opening the copper ammonia fiber, and adding an antistatic agent: water 3: 8, controlling the moisture regain of oil and water at 17%, and preserving for 24 h; adding an antistatic agent to cashmere: and (3) mixing the crude oil: water 2: 1: 10 percent of oil and water, the moisture regain is controlled at 24 percent, and the health preservation is carried out for 24 hours; and then performing fearnaught according to a 'transverse paving and straight taking' method by using a fearnaught machine.

3. Needle comb

The sliver making gill box is used for carrying out three gilling processes, the gilling needle is used for mixing the cuprammonium fiber sliver and wool carding wool down machine wool sliver, the drafting multiple is 5 times, and the front gauge is 60 mm. The space between the two-needle bar making and the three-needle bar combing is selected to be 35mm, and the bar discharging speed is 40 m/min; and after the oil and water are added into the two strip-making needles and the strips are placed for 12 hours, the strips are put on a machine and are taken out of the machine, so that the generation of coarse particles is prevented.

4. Combing

Combing is carried out by using a VSN9+ UV12 worsted gill box, the speed of the comb is 130 pincers/min, the space distance is 29mm, and the feeding amount is 200 g/m.

5. Composite comb

Two gilling processes are carried out by using a gilling machine for making sliver, and wool tops are discharged at a rate of 22 g/m.

6. Front spinning

The feed amount of one needle in the fore-spinning process is 100g/m, the drafting is 5 times, the gauge length is 28mm, the sliver output weight is 22g/m, and the unevenness rate is less than 0.7 percent. The sliver weight is 5g/m through two-needle and three-needle drafting, the sliver is 2.7g/m through the front spinning four-needle, and the unevenness rate is less than 1%.

7. Roving treatment

Roving was carried out using a FA458A120S roving machine with a gauge of 22mm in the front region and 30mm in the rear region. And obtaining 0.36g/m of roving sliver after the roving process drafting.

8. Spun yarn treatment

And (3) carrying out spinning treatment on an F1510-420 spinning frame, wherein the front area is 23mm, the rear area is 35mm, the twist coefficient is 120, the twist is 990T/M, and the drafting multiple is 24.48 times.

9. Yarn steaming machine

The yarn steaming is carried out by adopting double circulation, the first circulation is 80 ℃ for 5min, and the second circulation is 80 ℃ for 40 min.

10. Spooling and doubling

And the doubling speed is 380 m/min.

11. Two-for-one twisting

The specific parameters are the vehicle speed 5400-5500r/min, the design twist 410-430T/M, the tension bead 3#, and the twist direction of the tension guide wheel 3 and S.

12. Secondary yarn steaming

The yarn steaming is carried out by adopting a double-circulation loop, the first circulation is carried out for 5min at 80 ℃, and the second circulation is carried out for 50min at 80 ℃.

13. Rewinding, packaging and finished yarn inspection

The standard of the finished product is as follows: evenness CV%: 11.09%; kilometer details: 6; kilometer nubs: 31; and (3) knotting the kilometers of cotton: 32, a first step of removing the first layer; number deviation: 0.33 percent; weight CV%: 1.0 percent; moisture regain%: 11.49 percent; twist degree: 1002.61T/M; twist CV%: 3.31 percent; yarn strength: 507.6 CN; breaking strength 17.1 CN/TEX; strength CV%: 4.61 percent; percent elongation: 8.0 percent; the finished product has stable quality, and reaches 5% of the Uster 2000 gazette.

Example 2

The difference between this example and example 1 is:

the blending method comprises the following specific steps:

opening the copper ammonia fiber, and adding an antistatic agent: water 3: 8, controlling the moisture regain of oil and water at 17%, and preserving for 24 h; adding an antistatic agent to cashmere: and (3) mixing the crude oil: the methanol solution of hydramethylnon: water 2: 1: 1: 10 percent of oil and water, the moisture regain is controlled at 24 percent, and the health preservation is carried out for 24 hours; and then performing fearnaught according to a 'transverse paving and straight taking' method by using a fearnaught machine.

Example 3

The difference between this example and example 1 is:

the blending method comprises the following specific steps:

opening the copper ammonia fiber, and adding an antistatic agent: a genkwanin furfuryl alcohol mixture: water 3: 1: 8, controlling the moisture regain of oil and water at 17%, and preserving for 24 h; adding an antistatic agent to cashmere: and (3) mixing the crude oil: water 2: 1: 10 percent of oil and water, the moisture regain is controlled at 24 percent, and the health preservation is carried out for 24 hours; and then performing fearnaught according to a 'transverse paving and straight taking' method by using a fearnaught machine.

Example 4

The difference between this example and example 1 is:

the blending method comprises the following specific steps:

opening the copper ammonia fiber, and adding an antistatic agent: a genkwanin furfuryl alcohol mixture: water 3: 1: 8, controlling the moisture regain of oil and water at 17%, and preserving for 24 h; adding an antistatic agent to cashmere: and (3) mixing the crude oil: the methanol solution of hydramethylnon: water 2: 1: 1: 10 percent of oil and water, the moisture regain is controlled at 24 percent, and the health preservation is carried out for 24 hours; and then performing fearnaught according to a 'transverse paving and straight taking' method by using a fearnaught machine.

Example 5

Preparation of the Fabric

The blended fibers prepared in examples 1, 2, 3 and 4 were respectively knitted into a fabric A, B, C, D having a weft plain stitch structure by using a fully automatic knitting machine, wherein the degree of knitting was 80 and the speed of the knitting was 30 r/min.

Example 6

Preparation of the Fabric

The difference between this example and example 5 is: and (3) preparing a fabric E from cashmere fibers.

Test example 1

Testing of blend fiber Properties

First, blended fiber color rendering test

Blend fibers A, B, C, D, E from examples 5 and 6 were dyed using sodium copper chlorophyllin, the dyeing procedure was as follows:

(1) in each group of experiments, 0.5g of blended yarn is taken, the dye dosage is 1-8% (owf), the bath ratio is 1:50, 50mL of dye liquor is prepared, and 25mL of dye liquor is taken for dyeing, namely V₀＝25mL。

(2) The absorbance A of the dye solution before dyeing is calculated₀: the ImL dye was diluted 50-fold with a pipette prior to staining, and then the absorbance of the dilution was measured and the absorbance measured was multiplied by 50.

(3) Dyeing, wherein the bath ratio is maintained at 1:50 in the dyeing process.

(4) After dyeing is finished, taking out the blended fiber for natural drying after half an hour; measuring absorbance A of the residual liquid after dyeing₁。

And (3) metering the volume of the residual liquid metering cylinder to 50mL, taking 1mL of the residual liquid, metering the volume in a 50mL volumetric flask, measuring the absorbance of the diluent, and multiplying the measured absorbance by 50.

(5) The dyed fiber is washed by distilled water until the dyed fiber is almost fadeless, after the dyed fiber is fully dried, the dyed fiber is subjected to humidity regulation in a constant temperature and humidity chamber for 8 hours, 0.3g of blended fiber is cut into pieces, cuprammonium rayon powder is pressed into a sheet with the diameter of 1cm by a KBr tablet press, and the sheet is tested by a K/S color meter.

The staining rate was calculated using the following formula:

the test results are shown in table 1.

TABLE 1 dye uptake of blend fibers

Fabric	Dye uptake (%)	K/S value
			A	85.25	7.05
B	90.50	11.64
			C	84.77	7.10
D	91.02	11.21
			E	86.49	16.64

As can be seen from Table 1, the dye uptake and K/S values of the fabrics B and D are higher than those of other fabrics, which shows that the fabrics made of the blended fibers treated by the methylol solution of hydramethylone have better color development and the dyed colors are darker, and the color development of the blended fibers can be improved by using the methylol solution of hydramethylone in the wool blending process.

Second, blended fiber smoothness test

The static friction factors of the blend fibers and the common cashmere fibers in the embodiments 1, 2, 3 and 4 are tested by using a single fiber friction factor meter, so as to judge the smoothness, and the specific operation steps are as follows:

winding the fiber on a winch, setting the rotating speed of a rolling shaft to be 90r/min, hanging tension clamps with the same mass at two ends of the fiber, adjusting a balance pointer to zero, rotating a handle until the fiber and the rolling shaft suddenly slide, and reading the reading of the torsion balance when the torsion balance pointer begins to deviate.

The friction factor was calculated according to the following formula:

μ＝0.733[lgf₀-lg(f₀-m)]

in the formula (f)₀Is the sum of the masses of the two tension clamps, namely 400 cN;

and m is the stress on a weighing hook of the torsion balance.

The test results are shown in table 2.

TABLE 2 Friction factor of blend fibers

	Static friction factor
		Example 1	12.27
Example 2	12.43
		Example 3	9.32
Example 4	9.25
		Ordinary cashmere fiber	15.82

As can be seen from table 2, the static friction factor of the blend fibers in examples 1, 2, 3 and 4 is significantly smaller than that of the ordinary cashmere fibers, which indicates that the cashmere blend fibers containing copper ammonia fibers of the present invention have good smoothness; the static friction factors of the blended fibers in the examples 3 and 4 are obviously lower than those of the examples 1 and 2, which shows that the blended fibers prepared by treating the cuprammonium rayon with the daphnetin furfuryl alcohol mixture have better smoothness.

Test example 2

Testing of fabric Performance

Moisture permeability test

The blended fiber fabric A, B, C, D in example 5 and the common cashmere fabric E in example 6 are tested by using a positive cup method in GB/T12704.2-2009, part II of textile fabric moisture permeability test method, namely an evaporation method, a round sample with the diameter of 7cm is randomly cut from the fabric without flaw points, and the test conditions are 20 +/-2 ℃ and the relative humidity is 65 +/-2%; the inner diameter of the used moisture permeable cup is 60mm, the depth is 22mm, and the air flow velocity is 0.3-0.5 m/s. The moisture permeability is calculated by the following formula:

wherein WVT is the moisture permeability, g/(m)²h)；

The delta m is the mass difference g of water in the moisture permeable cup before and after the experiment;

a is the effective test area, m²；

T is the test time, h.

The test results are shown in fig. 1.

As can be seen from fig. 1, the moisture permeability of the fabric A, B, C, D is significantly higher than that of the fabric E, which shows that the cashmere blended fiber containing copper ammonia fiber of the present invention has good moisture permeability.

Second, antistatic Property test

The blended fiber fabric A, B, C, D of example 5 and the fabric E of example 6 were tested using the electrostatic voltage half-life method reported in GB/T12703 "evaluation of Electrostatic Properties of textiles", using the following specific procedure:

randomly taking out the fabric without flaw points, and cutting the fabric into a size of 48cm²The fabric is washed according to the 7A procedure in GB/T8629-2001, and dried at 50 ℃; after drying, the fabric is placed for 48 hours under the conditions of 20 ℃, 35% of relative humidity and 0.1m/s of ambient wind speed, and an induction type fabric static tester is used for testing the fabric. The test results are shown in table 3.

TABLE 3 Electrostatic Voltage and half-Life of the fabrics

Fabric	Static voltage (v)	Half-life(s)
			A	1127	7.21
B	1133	7.28
			C	1142	7.41
D	1135	7.35
			E	1624	13.77

As can be seen from table 3, the static voltage and half-life of fabric A, B, C, D were lower than those of fabric E, indicating that the fabric made of cashmere blend fiber containing copper ammonia fiber has good conductivity and therefore good antistatic property.

Three, blended fiber drapability test

The blended fiber fabrics in the examples 3, 4 and 5 are tested by adopting the method recorded in GB/T23329-2009 'determination of drapability of textile fabrics', a round sample with the diameter of 7mm is cut off from the fabric without flaw points randomly, and the test conditions are 20 +/-2 ℃ and the relative humidity is 65 +/-2%; static and dynamic drape coefficients were measured with a fabric drape performance tester for 1min, and the measurement results are shown in fig. 2.

As can be seen from fig. 2, both the dynamic and static drape coefficients of fabric A, B, C, D are less than fabric E, and therefore the drape is good.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for treating cashmere adopts wool oil, antistatic agent and methyl solution of hydramethylnon to treat cashmere.

2. The method of claim 1, wherein the weight ratio of the wool oil, the antistatic agent and the methanolic solution of hydramethylnon is 1-3:2-6: 1-3.

3. Use of the methanolic solution of hydramethylnon according to claim 1 for treating cashmere fibres.

4. The method for preparing the cashmere blend fiber containing the copper ammonia fiber is characterized by comprising the following steps of:

preparing raw materials, blending wool, carding, gilling, combing, rebinning, pre-spinning, roving, spinning, yarn steaming, spooling, doubling, double twisting, secondary yarn steaming, rewinding, packaging and inspecting finished yarn; the wool blending method specifically comprises the following steps:

treating copper ammonia fiber with antistatic agent;

treating cashmere by the treatment method of claim 1 or 2;

and mixing the treated copper ammonia fibers and the treated cashmere fibers.

5. The process according to claim 4, wherein the gauge of the gill is 30 to 35mm and the speed of the sliver is 40 to 45 min.

6. The method of claim 4, wherein the roving treatment has a gauge of 21-27mm in the front region and 28-35mm in the back region.

7. The method of claim 4, wherein in the spun yarn treatment, the gauge is 21-30mm in the front region and 27-36mm in the back region; the twist multiplier 110-.

8. A cashmere blend fiber containing copper ammonia fiber produced by the method of claim 1.

9. The blend fiber of claim 8, wherein the finished product indicator of the blend fiber is:

10. The blend fiber of claim 8, wherein said blend fiber has a dye uptake of > 84% and a K/S value of > 7.05.