CN112981645B - A kind of environmental protection wool knot colorful dot fancy yarn and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of fancy yarns, and specifically discloses an environment-friendly wool knot colored dotted fancy yarn and a preparation method thereof. After being treated with anti-felting finishing agent, the wool roving made by semi-worsted spinning process is used as decorative yarn, and the regenerated nylon is used as fixed yarn. Knots are more flexible in color matching. Compared with ordinary fancy yarns, the fancy yarns provided by the present invention are fiber-type knotted yarns, which are softer and fluffy in hand, have good elasticity, high strength, and have excellent wear resistance. Long-lasting anti-felt shrinkage and anti-static properties.

Description

A kind of environmental protection wool knot colorful dot fancy yarn and preparation method thereof

technical field

The invention belongs to the technical field of fancy yarns, and in particular relates to an environment-friendly wool knot colorful dot fancy yarn and a preparation method thereof.

technical background

Today, with the rapid development of textile technology, various new types of spinning are emerging one after another. Especially in recent years, in order to meet people's growing demand for fashion and personalization, fancy yarns have become an important branch in the textile industry. Unique and high-end fancy yarn products are changing with each passing day and have broad application prospects. Fancy yarn is a general term for fancy yarn and fancy thread, which refers to the yarn produced by special processing technology with irregular or regular changes in appearance and structure, which is different from ordinary single yarn and stranded yarn. Fancy yarn has changed the appearance style of the fabric to a great extent, making it more three-dimensional and richer in color. It is widely used in the development of various clothing fabrics and decorative products with a unique style. Fancy yarns are widely used not only in knitted products, but also in woven products. The development of high-end fancy yarn products will definitely become a popular trend. However, the fancy yarns currently on the market are mostly single in function, only have simple aesthetic functions, feel stiff, and have poor elasticity, which cannot meet people's needs. Therefore, it is urgent to develop a kind of soft, fluffy, elastic, and versatile fancy yarn.

Natural fibers have been used by human civilization for thousands of years. Among them, the natural crimp and scaly structure of wool make wool fibers more easily cohesive, which is beneficial to spinning, and the better moisture absorption and perspiration properties make it comfortable to wear and have a long service life. It is worth mentioning that the strength, temperature and humidity management and anti-odor properties of wool make this traditional fiber shine in the field of innovation, and it is widely used in high-performance sportswear, health products and technical textiles. Therefore, the application of wool fibers into fancy yarns holds great promise.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide an environmentally friendly wool knot colored dot fancy yarn and a preparation method thereof. The yarn uses three-color dot yarn as the core yarn and wool roving as the decorative yarn , Regenerated nylon is fixed yarn, which is made by short fiber flower twisting equipment. Anti-felt shrinkage, antistatic properties.

In order to achieve the above objects, the technical solutions adopted by the present invention include the following problems.

Subject 1, an environmentally friendly wool knot colorful dot fancy yarn, including:

Core yarn: cotton/regenerated polyester three-color dot yarn with yarn count of 30~50Ne, the ratio of cotton fiber to recycled polyester is 90:10~95:5, and the core yarn content is 10~30%;

Decorative yarn: wool roving made by semi-worsted spinning process after treatment of fine short wool with anti-felt finishing agent, the yarn count is 2-5Nm, and the decorative yarn content is 70-85%;

Fixed yarn: 70D/24F regenerated nylon, the fixed yarn content is 2-5%; among them,

The etherification degree of the cotton fiber is 0.28-0.4%, and carbon nanotubes are grafted;

The anti-felt finishing agent includes: a core material composed of silk fibroin and polyvinyl alcohol, and a wall material composed of cucurbit[6]uril and carboxymethyl chitosan, and the mass ratio of the core material to the wall material is 1:1.4 ~1.8.

In the invention, the cotton/regenerated polyester three-color dotted yarn is used as the core yarn, the wool roving is used as the decorative yarn, and the regenerated nylon is used as the fixed yarn to obtain the environment-friendly wool knot colored dotted fancy yarn, and the colored dotted yarn is combined with the wool roving to obtain the finished fancy yarn. There are both colored dots and three-dimensional knots in the thread, and the color matching is more flexible. Compared with ordinary fancy yarns, the fancy yarns provided by the present invention are fiber-type knotted yarns, which are softer, fluffy, and have good elasticity. High strength, excellent wear resistance, long-lasting anti-felt shrinkage and antistatic properties.

In some embodiments, the cotton fiber grafted carbon nanotubes are specifically prepared by the following method:

1) adding carbon nanotubes to a mixed solution of concentrated sulfuric acid/concentrated nitric acid, heating to 50-60° C. and keeping the temperature for 2-3 hours, then dialyzing and drying to obtain acidified carbon nanotubes;

2) At room temperature, soak the cotton fibers in a sufficient amount of alkaline solution for 10-30min to swell the cotton fibers, add ethylene oxide, then heat up to 40-60°C for the first etherification reaction for 30- After 60min, the temperature was raised to 80～90℃ for the second etherification reaction, the time was 0.5～2h, after the reaction was completed, the temperature was lowered to below 40℃, glacial acetic acid and glyoxal were added, and after neutralization, centrifugation, washing and drying were carried out. get etherified cotton fiber;

3) After mixing the acidified carbon nanotubes and fatty acid glycerides, add them into deionized water of 30 to 40 times by weight, and ultrasonically disperse them for 25 to 30 minutes to obtain a carbon nanotube dispersion, and soak the etherified cotton fibers in the carbon nanotubes to disperse In the solution, microwave treatment at 45-50 °C for 0.5-4 h, after the end, heat preservation treatment at 55-60 °C for 15-40 s, then rinse with deionized water and dry to obtain cotton fiber grafted carbon nanotubes.

Further, in the above-mentioned step 1), the mixed volume ratio of the concentrated sulfuric acid and the concentrated nitric acid in the concentrated sulfuric acid/concentrated nitric acid mixed solution is 3 to 4:1.

Further, in the above-mentioned step 1), the drying temperature is 70-80°C.

Further, in the above-mentioned step 2), the alkaline solution is a potassium tert-butoxide/urea mixed solution, the mass fraction of potassium tert-butoxide is 5-20%, and the mass fraction of urea is 3-5%.

Further, in the above-mentioned step 2), the added weight ratio of ethylene oxide and etherified cotton fiber is 0.12-0.18:1.

Further, in the above-mentioned step 2), the addition amounts of glacial acetic acid and glyoxal are respectively 0.15-0.2 and 0.05-0.2 of the cotton fibers.

Further, in the above steps 2) and 3), the drying temperature is 40-50°C.

Further, in the above-mentioned step 3), the added weight ratio of acidified carbon nanotubes, fatty acid glycerides, and etherified cotton fibers is 2-2.5:0.8-1:10.

Further, in the above-mentioned step 3), the frequency of ultrasonic dispersion is 20-25 kHz, and the power density is 0.3-0.35 W/cm ² .

Further, in the above-mentioned step 3), the power of the microwave treatment is 300-500W.

In the present invention, an environmentally friendly wool knot colorful dot fancy yarn is prepared by using the three-color dot yarn obtained from the carbon nanotube graft-modified cotton fiber and the regenerated polyester as the core yarn. After the cotton fiber is modified, the carbon nanometer The tube is evenly adsorbed on the surface and pores of the cotton fiber, making the cotton fiber stiff and not easy to deform, reducing the hydrophilicity of the surface of the cotton fiber, reducing its shrinkage, and improving the tensile strength of the cotton fiber; control the cotton fiber The highest degree of etherification makes cotton fibers have excellent spinnability, improves product quality, and makes the final product have excellent tensile properties and wear resistance, and the wear resistance is more durable and can better maintain pattern stability.

In some embodiments, in the anti-felt finish:

The core material includes silk fibroin and polyvinyl alcohol, and the added weight ratio of silk fibroin and polyvinyl alcohol is 2-3:1;

The wall material includes cucurbit[6] urea and carboxymethyl chitosan, and the added weight ratio of cucurbit[6] urea and carboxymethyl chitosan is 1:4-5.

In some embodiments, the above-mentioned anti-felt finishing agent is prepared by the following method:

Dissolving carboxymethyl chitosan in glacial acetic acid solution to a final concentration of 3-6wt%, then adding emulsifier, silk fibroin and polyvinyl alcohol, stirring evenly to obtain an emulsion, adjusting pH to 4.5-5 with citric acid, Stir at 45～50℃ for 2～3h, then cool to room temperature and let stand for 1～2h, add cucurbit[6]uril, heat up to 55～60℃, stir for 1～2h, lower to room temperature, adjust pH with ammonia solution to 9.5 to 10.0, suction filtration and freeze drying to obtain anti-felt finishing agent.

The anti-felting finishing agent provided by the invention can destroy the cross-linking between the wool scale layers and form a layer of film on the surface of the wool fiber, so as to coat the scale layer to reduce the directional friction effect of the fibers, and endow the wool with excellent and lasting anti-felting shrinkage It can also improve the wettability of wool surface and improve its antistatic performance; the addition of cucurbit[6]urea and chitosan in the anti-felt finishing agent has a synergistic effect with chitosan, which can not only further prolong the It has anti-felting effect and antistatic property, and obviously enhances the wear resistance and mechanical properties of fancy yarns.

Further, in the process of preparing the anti-felt finishing agent, the emulsifier is Tween-80 or OP-80, and the addition amount is 1-3% of the mass of carboxymethyl chitosan.

Further, in the process of preparing the anti-felt finishing agent, the stirring rate is 2000-3000 r/min.

Further, in the process of preparing the anti-felt finishing agent, the heating rate is 1-3° C./min.

Further, in the process of preparing the anti-felt finishing agent, the mass fraction of the sodium hydroxide solution is 5-20%.

Further, in the process of preparing the anti-felt finishing agent, the stirring rate is 600-1000 r/min.

Further, in the process of preparing the anti-felt finishing agent, the freeze-drying temperature is -80～-60°C.

Subject 2, subject 1, the preparation method of environmentally friendly wool knot colored dot fancy yarn, including:

1) Using fine short wool as the material, it is spun into wool roving by semi-worsted processing technology. The technological process includes: carding - drawing (three passes) - roving;

2) It is processed into environmentally friendly wool knot colorful dot fancy yarn on a three-roller flower twisting machine, and the process parameters are:

The speed of hollow ingot is 750～2500r/min;

Ring spindle speed 500～1600r/min;

Front roller speed 140～200r/min;

Core yarn roller speed 50～70r/min;

Back roller speed 18～24r/min;

Internal twist 680～700 twists/10cm;

External twist 310～350 twists/10cm;

Drafting ratio 25～30;

Knot output speed 0.2～0.22m/min;

3) Put the fancy yarn into the double-circulation steaming box, steam the yarn at 75-80°C for 30-50min, cool down naturally after steaming, and then rewind the drum at a slow speed to obtain the finished product. The rewinding speed is controlled at 300m/m min or less.

In the invention, the wool roving obtained by semi-worsted spinning is used as the decorative yarn, the cotton/regenerated polyester three-color dotted yarn is used as the core yarn, and the regenerated nylon is used as the fixed yarn. The yarn can fully reflect the advantages of the raw materials, the fibers are parallel and straight, the finished fancy yarn is of high quality, the knots are full and elastic, and the hand feel is softer; the combination of colored dot yarn and wool roving makes the fancy yarn feel soft and fluffy, It also has the characteristics of high mechanical properties, good wear resistance and excellent corrosion resistance.

Further, in the step 1) of the described preparation of environmentally friendly wool knot colored dot fancy yarn, the specific process parameters of carding are:

Outlet weight 18～23g/5m;

Strip speed 35～40m/min;

Cylinder speed 300～350r/min;

Spinning speed 640～700r/min;

Doffer speed 21～25r/min;

Cover speed 80 ~ 100r/min.

Further, the length damage of the fine short wool after the carding process is less than 2mm, and the hair grain is less than 5 grains/g.

Further, in the step 1) of the described preparation of environmentally friendly wool knot colored dot fancy yarn, the specific process parameters of the drawing frame are:

Combined: the weight of the sliver is 18-23g/5m, the number of combined pieces is 6-8, and the draft ratio in the rear area is 1.8-1.9;

Two merging: the weight of the sliver is 14-20g/5m, the number of merging is 6-8, and the drafting ratio of the rear area is 1.2-1.3;

Three merging: the weight of the sliver is 14-20g/5m, the number of merging is 6-8, and the drafting ratio of the rear area is 1.3-1.4;

Stripping speed: 275～300m/min, the actual drafting ratio is 5～7.

Further, the evenness of the fine short wool after the drawing process is lower than 4%.

Further, in the step 1) of the described preparation of environmentally friendly wool knot colored dot fancy yarn, the specific process parameters of the roving are:

Roving quantitative 5～8g/10m;

Spindle speed 700～800r/min;

The draft ratio in the rear area is 1.2 to 1.4;

The distance from the center of the roller to the front area is 58-62.5mm/the rear area is 61-66.5mm.

Further, the evenness of the fine short wool after the roving process is lower than 8%, and the yarn count is 2-2.5Nm.

Further, the knot spacing of the environmentally friendly wool knot colorful dot fancy yarn is 5-10 cm, randomly distributed, and the knot length is 0.6-0.8 cm.

By adopting the above technical scheme, the present invention uses cotton/regenerated polyester three-color dotted yarns as core yarns, wool rovings as decorative yarns, and recycled nylon as fixed yarns to obtain environmentally friendly wool knot colored dotted fancy yarns, thus having the following beneficial effects:

1) In the present invention, the environmentally friendly wool knot colorful dot fancy yarn is processed by a three-roller flower twister, which can fully reflect the advantages of the raw materials, the fibers are parallel and straight, the finished fancy yarn is of high quality, and the knots are plump and elastic, Softer hand feel; the combination of colored dot yarn and wool roving makes fancy yarn soft and fluffy, and also has the characteristics of high mechanical properties, good wear resistance and excellent corrosion resistance;

2) In the present invention, treating the fine short wool with an anti-felt finishing agent can destroy the cross-linking between the wool scale layers, and form a layer of film on the surface of the wool fiber, thereby covering the scale layer to reduce the directional friction effect of the fiber, giving Wool has excellent and long-lasting anti-felt shrinkage, and has little damage to the surface of wool fabrics, which improves the wettability of the wool surface and improves its antistatic performance; the addition of cucurbit[6]urea in the anti-felting finishing agent has the same effect as chitosan. The synergistic effect can not only further prolong the anti-felt effect and antistatic property, but also significantly enhance the mechanical properties and wear resistance of fancy yarns;

3) In the present invention, the three-color dotted yarn obtained from the carbon nanotube graft-modified cotton fiber and the regenerated polyester is used as the core yarn to prepare the environment-friendly wool knot colorful dotted fancy yarn. After the cotton fiber is modified, Carbon nanotubes are evenly adsorbed on the surface and pores of cotton fibers, making cotton fibers stiff and not easily deformed, reducing the hydrophilicity of the surface of cotton fibers, reducing their shrinkage, and improving the tensile strength of cotton fibers; control The etherification degree of the cotton fiber makes the cotton fiber have excellent spinnability, improves the product quality, and makes the final product have excellent tensile properties and wear resistance, the wear resistance is more durable, and the pattern stability can be better maintained.

Description of drawings

Fig. 1 is the FTIR diagram of the cotton fiber of Example 1 of the present invention; wherein, a represents the cotton fiber without modification treatment, and b represents the cotton fiber after modification treatment;

Fig. 2 is the mechanical properties of the environmental protection wool knot colorful dot fancy yarn of the present invention; wherein, B represents tensile strength, and C represents elongation at break;

Fig. 3 is the abrasion resistance of the environmental protection wool knot colorful dot fancy yarn of the present invention;

Fig. 4 is the antistatic performance (static voltage half-life) of the environment-friendly wool knot colored dot fancy yarn of the present invention; B represents the initial static voltage half-life, and C represents the static voltage half-life after washing 5 times;

Figure 5 shows the antistatic properties (areal charge density) of the environmentally friendly wool knot colored dot fancy yarn of the present invention; B represents the initial charge area density, and C represents the charge area density after washing with water for 5 times.

Detailed ways

In order for those skilled in the art to understand the features and effects of the present invention, general descriptions and definitions of terms and expressions mentioned in the specification and claims are hereunder.

In the present invention, unless otherwise stated, all percentages, parts, ratios, etc. are by weight; otherwise stated include but not limited to "wt%" means weight percentage, "mol%" means mole "means volume percent.

In the present invention, the degree of etherification of the cotton fiber is tested by the following method: the modified cotton fiber is subjected to acetic esterification to obtain the acetate modified cotton fiber, the hydrogen nuclear magnetic spectrum is tested, and the spectrum is calculated after peak separation processing. get.

The technical solutions of the present invention will be described in further detail below with reference to the specific embodiments and the accompanying drawings.

Embodiment 1: a kind of environmental protection wool knot colorful dot fancy yarn:

This embodiment provides an environmentally friendly wool knot colorful dot fancy yarn, including:

Core yarn: cotton/recycled polyester three-color dot yarn with yarn count of 30Ne, the mixing ratio of cotton and recycled polyester is 95:5, and the core yarn content is 20%;

Decorative yarn: wool roving with a yarn count of 5Nm and a decorative yarn content of 76%;

Fixed yarn: 70D/24F regenerated nylon, the fixed yarn content is 4%.

Environmentally friendly wool knot colored dot fancy yarn is prepared by the following method:

1) Preparation of cotton/recycled polyester tricolor dot yarn:

5g of carbon nanotubes were added to the mixed solution of concentrated sulfuric acid/concentrated nitric acid with a mass fraction of 10% (the mixed volume ratio of concentrated sulfuric acid and concentrated nitric acid was 1:0.4), heated to 60 ° C, kept for 3 hours, and then dialyzed, 70 The acidified carbon nanotubes were obtained by drying at ℃; at room temperature, 10 g of cotton fibers were immersed in a mixed solution of sodium hydroxide/potassium tert-butoxide with a mass fraction of 20% for 30 min, and the mixing volume ratio was 1:0.3 to swell the cotton fibers. Add 1.6g ethylene oxide, then heat up to 70°C for etherification reaction, the time is 40min, cool down to below 40°C, add 1.5g glacial acetic acid and 1g glyoxal for neutralization reaction, after neutralization, centrifuge and wash , dried at 60°C to obtain etherified cotton fibers; 3g of acidified carbon nanotubes and 1g of fatty acid glycerides were mixed and added to 140g of deionized water, and ultrasonically dispersed (frequency was 20kHz, power density was 0.3W/cm ² ) for 30min , to obtain a carbon nanotube dispersion, soak 10 g of etherified cotton fibers in the carbon nanotube dispersion for 16 hours, and then dry them at 60 °C to obtain modified cotton fibers (the degree of etherification is 0.32%), which is then regenerated with Polyester blended into three-color dot yarn of 30Ne;

2) Preparation of wool roving, the technological process includes: anti-felting treatment - carding - drawing (three passes) - roving, specifically including:

2.1) Dissolve 5g of carboxymethyl chitosan in 100g of glacial acetic acid solution, add 0.1g of OP-80, 1.2g of silk fibroin and 2.5g of polyvinyl alcohol, stir evenly at 3000r/min to obtain an emulsion; use citric acid Adjust pH to 5, heat up to 50°C and stir for 3h, cool to room temperature and let stand for 2h; add 1 g of cucurbit[6]uril, heat up to 60°C, stir at 800r/min for 2h, cool to room temperature, use a mass fraction of 20 % sodium hydroxide solution to adjust pH to 10.0, suction filtration, and freeze-drying at -60°C to obtain an anti-felting finishing agent; immerse the fine short wool in the anti-felting finishing agent, two dips and two rollings (rolling residual rate 80%, After immersion time of 1h), pre-bake at 80°C for 5min, and then bake at 130°C for 2min, for later use;

2.2) Carding process, the specific process parameters are: sliver weight 21.5g/5m, sliver speed 37.8m/min, cylinder speed 330r/min, thorn rolling speed 670r/min, doffer speed 23.5r/min, cover speed 87r/min;

2.3) Drawing process, the specific process parameters are:

Combined: the weight of the sliver is 21.3g/5m, the number of combined pieces is 8, and the draft ratio in the rear area is 1.85;

Two merging: the weight of the sliver is 18.5g/5m, the number of merging is 8, and the drafting ratio of the rear area is 1.25;

Three merging: The weight of the sliver is 14g/5m, the number of merging is 8, and the drafting ratio of the rear area is 1.30;

Stripping speed: 285m/min, the actual drafting multiple is 7;

2.4) Roving process, the specific process parameters are:

The output weight is 7.14g/10m, the spindle speed is 750r/min, the draft ratio of the rear area is 1.2, and the distance between the roller center and the front area is 60.5mm/the rear area is 64.5mm;

3) Processed into environmentally friendly wool knot colored dot fancy yarn on a three-roller flower twisting machine;

The hollow spindle speed is 900r/min, the ring spindle speed is 740r/min, the front roller speed is 160r/min, the core yarn roller speed is 60r/min, the rear roller speed is 18r/min, the inner twist of the yarn is 680 twists/10cm, and the outer twist is 350 twists/min 10cm, draft ratio 28, knot output speed 0.2m/min;

4) Put the fancy yarn into the double-circulation steaming box, steam the yarn at 80°C for 30 minutes, cool down naturally after steaming, and then slowly rewind the drum to obtain the finished product, and the drum rewinding speed is controlled at 200m/min.

Example 2: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another environmentally friendly wool knot colored dotted fancy yarn, the components and preparation method of which are basically the same as those in Example 1, the difference is that in this embodiment, the cotton/regenerated polyester tricolor dotted yarn is prepared. During the process, the amount of ethylene oxide added was 0.5 g, and the etherification degree of the cotton fiber was 0.15.

Example 3: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another environmentally friendly wool knot colored dotted fancy yarn, the components and preparation method of which are basically the same as those in Example 1, the difference is that in this embodiment, the cotton/regenerated polyester tricolor dotted yarn is prepared. During the process, the amount of ethylene oxide added was 1 g, and the etherification degree of cotton fiber was 0.28%.

Example 4: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another environmentally friendly wool knot colored dotted fancy yarn, the components and preparation method of which are basically the same as those in Example 1, the difference is that in this embodiment, the cotton/regenerated polyester tricolor dotted yarn is prepared. During the process, the amount of ethylene oxide added was 2g, and the etherification degree of cotton fiber was 0.4%.

Example 5: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another environmentally friendly wool knot colored dotted fancy yarn, the components and preparation method of which are basically the same as those in Example 1, the difference is that in this embodiment, the cotton/regenerated polyester tricolor dotted yarn is prepared. During the process, the amount of ethylene oxide added was 3 g, and the etherification degree of cotton fiber was 0.48%.

Example 6: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another kind of environmentally friendly wool knot colored dot fancy yarn, and its components and preparation method are basically the same as those in embodiment 1, the difference is that in this embodiment, the cotton fiber is not modified.

Example 7: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another kind of environmentally friendly wool knot colored dot fancy yarn. The finishing agents are silk fibroin and polyvinyl alcohol.

Example 8: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another kind of environmentally friendly wool knot colored dot fancy yarn. No cucurbit[6]uril was added to the finishing agent.

Example 9: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another kind of environmentally friendly wool knot colored dot fancy yarn. Chitosan is not added to the finishing agent.

Example 10: Another environmentally friendly wool knot colorful dot fancy yarn:

This embodiment provides another environmentally friendly wool knot colored dot fancy yarn, the components and preparation method of which are basically the same as those in embodiment 1, the difference is that in this embodiment, the fine short wool is not treated with anti-felt shrinkage.

In order to verify the technical effect of the present invention, the present invention also provides the following experimental examples.

Experimental example 1: Quality index of environmentally friendly wool knot color dot fancy yarn:

Taking the environmentally friendly wool knot colored fancy yarn provided in Examples 1 to 10 as the experimental object, the quality variation coefficient, quality deviation, single strength variation coefficient, and evenness variation coefficient were tested with reference to the FZ/T20017-2010 standard. The results are shown in Table 1.

Table 1 Quality index of environmentally friendly wool knot colorful dot fancy yarn

Example Quality Coefficient of Variation/% Quality deviation/% Single strong coefficient of variation/% Evenness/% 1 2.0 0.6 5.2 7.6 2 2.1 0.8 8.1 8.0 3 2.0 0.6 6.2 7.8 4 1.9 -0.7 4.8 7.8 5 2.0 0.7 6.0 7.6 6 2.1 0.8 10.4 7.9 7 3.2 -1.8 9.8 11.5 8 2.8 1.5 8.5 10.7 9 2.4 1.0 7.1 9.3 10 3.4 2.1 12.8 13.4

As shown in Table 1, the quality variation coefficient of the environmental-friendly wool knot colored dot fancy yarn obtained by the method of the present invention is not higher than 3.45%, the quality deviation is up to 2.1%, and the single strength variation coefficient is not higher than 12.8% , the evenness is not higher than 13.4%, all in line with the industry standard; from Examples 7 to 10, it can be seen that the anti-felting treatment of wool has an effect on the quality variation coefficient, quality deviation and single strength variation coefficient of the finished fancy yarn. , The evenness of evenness has a greater impact. It can be seen from Examples 1 to 6 that the modified cotton fiber helps to improve the uniformity of the finished fancy yarn, and the coefficient of variation of single strength decreases.

Example 2: Tensile properties of environmentally friendly wool knot colored dot fancy yarn:

Taking the environmentally friendly wool knot colorful dot fancy yarn provided in Examples 1-10 as the experimental object, the tensile properties were tested with reference to the national standard GB/T3916-2013, and the test results are shown in Figure 2.

As shown in the figure, the tensile strength and elongation at break of the environmentally friendly wool knotted fancy yarn prepared by the method of the present invention are high, and the tensile strength of the fancy yarn prepared in the preferred embodiment 1 reaches 22.6cN/tex, the elongation at break reaches 18.9%, and the mechanical properties are excellent; it can also be seen that the core yarn in the fancy yarn plays a supporting role to ensure the strength of the yarn, so the modification treatment of cotton fiber (Example 1 ～6) It has a great influence on the strength of the yarn. Compared with the unmodified cotton fiber (Example 6), the tensile strength and elongation of the modified cotton fiber are improved; It has a significant impact on the mechanical properties of the yarn. After the wool is treated with anti-felt, a layer of film is formed on the surface, which can improve the strength and elongation of the yarn. The synergistic effect is more conducive to improving the tensile strength and elongation at break of the yarn.

Example 3: Wear resistance of environmentally friendly wool knot colorful dot fancy yarn:

Taking the environmentally friendly wool knot colorful dot fancy yarn provided in Examples 1 to 10 as the experimental object, the wear resistance was tested with a Y731 type clasping instrument. Load reciprocating rate 140 times/min. The test results are shown in Figure 3.

As shown in the figure, the environmentally friendly wool knot colored fancy yarn prepared by the method of the present invention has excellent wear resistance and is not easy to pilling. Excellent, it should also be seen that the anti-felting treatment wool made fancy yarns more excellent in abrasion resistance than the wool without anti-felting treatment (Example 10), which indicates that the anti-felting finish The agent can form a layer of film on the wool surface to protect the wool and improve the wear resistance of the wool, thereby improving the wear resistance of the finished fancy yarn. There is a synergistic effect between cucurbit[6]urea and chitosan, which can significantly improve the yarn Abrasion resistance of the wire.

Example 4: Anti-felt shrinkage performance of environmentally friendly wool knot colored dot fancy yarn:

Taking the environmental protection wool knot colorful dot fancy yarn provided by Examples 1 to 10 as the experimental object, it is woven into a fabric according to the conventional process, and the fabric is washed 0 times, 10 times, 20 times, The felt shrinkage rate after 30 times, the test results are shown in Table 2.

Table 2 Anti-felting performance of environmentally friendly wool knot colored dot fancy yarn

As shown in Table 2, the environmentally friendly wool knot colorful dot fancy yarn obtained by the method of the present invention has low felt shrinkage, strong felt shrinkage resistance, and durable felt shrinkage resistance. After 30 times of washing with water, the felt shrinkage rate of the yarn is 9.42%, and it can still maintain a good felt shrinkage; The felt shrinkage rate of the fancy yarn is lower, and the anti-felt shrinkage performance is better, which indicates that the anti-felt shrinkage finishing agent successfully coats the surface of the wool, reduces the directional friction effect of the fiber, and gives the wool excellent and lasting anti-felt performance. It can be seen from the data of Examples 8 and 9 that there is a synergistic effect between chitosan and cucurbit[6] urea, which is more conducive to improving the anti-felt shrinkage and durability.

Experimental example 5: Antistatic properties of environmentally friendly wool knot colored dot fancy yarn:

Taking the environmentally friendly wool knot colored fancy yarns provided in Examples 1-10 as the experimental objects, according to GB/T12703.1-2008 "Evaluation of Electrostatic Properties of Textiles Part 1: Electrostatic Voltage Half-life" and GB/T12703.2- 2009 "Evaluation of Electrostatic Properties of Textiles Part 2: Charge Surface Density" test, test its initial electrostatic voltage half-life, charge surface density and initial half-life after 5 washes, charge surface density, and the test results after drying are shown in Figures 4 and 5, respectively shown;

As shown in Figures 4 and 5, the environmentally friendly wool knot colored dot fancy yarn prepared by the method of the present invention has excellent antistatic properties, the shortest half-life is 0.74s, the minimum charge density is 0.4C/m ² , and After 5 times of washing, the half-life and charge density have no obvious change, and the anti-static performance is long-lasting. It can also be seen that the anti-static performance of wool is greatly improved after anti-felting treatment, which may be because the anti-felting finishing agent is successfully packaged. Covered on the surface of wool, the hydrophilic substance contained in the anti-felting finishing agent improves the hydrophilicity of wool and improves the antistatic performance.

Routine operations in the operation steps of the present invention are well known to those skilled in the art and will not be repeated here. The above-mentioned embodiments describe the technical solutions of the present invention in detail. It should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention. Any modifications, additions or substitutions in similar manners, etc., shall be included within the protection scope of the present invention.

Claims (9)

1. an environmentally friendly wool knot colored dot fancy yarn, is characterized in that, comprises: Core yarn: cotton/regenerated polyester three-color dot yarn with yarn count of 30~50Ne, the ratio of cotton fiber to recycled polyester is 90:10~95:5, and the core yarn content is 10~30%; Decorative yarn: wool roving made by semi-worsted spinning process after treatment of fine short wool with anti-felting finishing agent, the yarn count is 2-5Nm, and the content of decorative yarn is 70-85%; Fixed yarn: 70D/24F regenerated nylon, the fixed yarn content is 2-5%; among them, The etherification degree of the cotton fiber is 0.28-0.4%, and carbon nanotubes are grafted; The anti-felt finishing agent includes: a core material composed of silk fibroin and polyvinyl alcohol, and a wall material composed of cucurbit[6]uril and carboxymethyl chitosan, and the mass ratio of the core material to the wall material is 1:1.4 ~1.8; The cotton fiber grafted carbon nanotubes are specifically prepared by the following method: 1) adding carbon nanotubes to a mixed solution of concentrated sulfuric acid/concentrated nitric acid, heating to 50-60° C. and keeping the temperature for 2-3 hours, then dialyzing and drying to obtain acidified carbon nanotubes; 2) At room temperature, soak the cotton fibers in a sufficient amount of alkaline solution for 10-30min to swell the cotton fibers, add ethylene oxide, then heat up to 40-60°C for the first etherification reaction for 30- After 60min, the temperature was raised to 80～90℃ for the second etherification reaction, the time was 0.5～2h, after the reaction was completed, the temperature was lowered to below 40℃, glacial acetic acid and glyoxal were added, and after neutralization, centrifugation, washing and drying were carried out. get etherified cotton fiber; 3) After mixing the acidified carbon nanotubes and fatty acid glycerides, add them into deionized water of 30 to 40 times by weight, and ultrasonically disperse them for 25 to 30 minutes to obtain a carbon nanotube dispersion, and soak the etherified cotton fibers in the carbon nanotubes to disperse In the liquid, microwave at 45～50℃ for 0.5～4h, after the end, heat preservation at 55～60℃ for 15～40s, then rinse with deionized water and dry to obtain cotton fiber grafted carbon nanotubes; In step 2), the alkaline solution is potassium tert-butoxide/urea mixed solution, the mass fraction of potassium tert-butoxide is 5-20%, and the mass fraction of urea is 3-5%; In step 3), the added weight ratio of acidified carbon nanotubes, fatty acid glycerides, and etherified cotton fibers is 2-2.5:0.8-1:10. 2 . The environmentally friendly wool knot colored dot fancy yarn according to claim 1 , wherein the added weight ratio of ethylene oxide and etherified cotton fiber is 0.12-0.18:1. 3 . 3. environmental protection wool knot color dot fancy yarn according to claim 1 and 2 is characterized in that, anti-felting finishing agent comprises: The ratio of silk fibroin and polyvinyl alcohol in the core material is 2-3:1; The ratio of cucurbit[6]uril and carboxymethyl chitosan in the wall material was 1:4-5. 4. environmental protection wool knot colored dot fancy yarn according to claim 3 is characterized in that, anti-felt shrinkage finishing agent is prepared via following method: Dissolving carboxymethyl chitosan in glacial acetic acid solution to a final concentration of 3-6wt%, then adding emulsifier, silk fibroin and polyvinyl alcohol, stirring evenly to obtain an emulsion, and adjusting pH to 4.5-5 with citric acid, Stir at 45-50°C for 2-3h, then cool to room temperature and let stand for 1-2h, add cucurbit[6]uril, heat up to 55-60°C, stir for 1-2h, cool to room temperature, adjust pH to 9.5～10.0, suction filtration, freeze-drying to obtain anti-felt finishing agent. 5. The preparation method of the environment-friendly wool knot colored dot fancy yarn according to any one of claims 1 to 4, characterized in that, comprising: 1) Using fine short wool as the material, it is spun into wool roving by semi-worsted processing technology. The technological process includes: carding - drawing frame - roving; 2) It is processed into environmentally friendly wool knot colorful dot fancy yarn on a three-roller flower twisting machine, and the process parameters are: The speed of hollow ingot is 750～2500r/min; Ring spindle speed 500～1600r/min; Front roller speed 140～200r/min; Core yarn roller speed 50～70r/min; Back roller speed 18～24r/min; Internal twist 680～700 twists/10cm; External twist 310～350 twists/10cm; Draft multiple 25～30; Knot output speed 0.2～0.22m/min; 3) Put the fancy yarn into the double-circulation steaming box, steam the yarn at 75-80°C for 30-50min, cool down naturally after steaming, and then rewind at a slow speed to obtain the finished product. The rewinding speed is controlled at 300m/ min or less. 6. method according to claim 5, is characterized in that, the concrete technological parameters of combing are: sliver weight 18～23g/5m, sliver speed 35～40m/min, cylinder rotating speed 300～350r/min, thorn The rolling speed is 640~700r/min, the doffer speed is 21~25r/min, and the cover speed is 80~100r/min. 7. method according to claim 5 or 6, is characterized in that, the concrete technological parameter of drawing frame is: Combined: the weight of the sliver is 18-23g/5m, the number of combined pieces is 6-8, and the draft ratio in the rear area is 1.8-1.9; Two merging: the weight of the sliver is 14-20g/5m, the number of merging is 6-8, and the drafting ratio of the rear area is 1.2-1.3; Three merging: the weight of the sliver is 14-20g/5m, the number of merging is 6-8, and the drafting ratio of the rear area is 1.3-1.4; Stripping speed: 275～300m/min, actual drafting multiple is 5～7. 8. method according to claim 5, is characterized in that, the concrete technological parameter of roving is: Roving quantitative 5～8g/10m; Ingot speed 700～800r/min; The draft ratio in the rear area is 1.2 to 1.4; The roller center is 58～62.5mm from the front area/61～66.5mm from the rear area. 9 . The method according to claim 8 , wherein the yarn count of the roving is 2-2.5 Nm, and the evenness of evenness is lower than 8%. 10 .

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