A method for preparing a bulked wool-polyester blended yarn

Abstract

The application relates to the field of worsted wool blended yarns, and particularly discloses a preparation method of a puffy body type wool-polyester blended yarn, which adopts high-shrinkage polyester and merino super-fine wool as raw materials in a mass ratio of (3.5-4.5):(5.5-6.5), and comprises the following steps: mixing slivers for 3-5 times, combing once, five needle combing, roving, spinning, bobbin winding, oiling on the bobbin, doubling, doubling twisting, steaming, dyeing and obtaining of the worsted wool-polyester yarn, and spraying once and wool oil in the mixing sliver process. The puffy body type wool-polyester blended yarn prepared by the preparation method has high strength and high shrinkage performance.

Description

Technical Field

[0001] This application relates to the field of worsted wool blended yarns, and more specifically, it relates to a method for preparing a bulky wool-polyester blended yarn. Background Technology

[0002] To meet customers' diverse needs for yarn functionality, functional yarns are becoming increasingly popular. Lightweight and fluffy yarns are gaining traction, producing fabrics that are light, fluffy, and have a full hand feel. To further enhance the fluffiness and lightness of yarns, many manufacturers choose fibers such as acrylic and silk. However, acrylic fibers have relatively poor shape retention, silk is expensive, and yarn strength is relatively low, failing to meet customers' long-term performance requirements.

[0003] Polyester boasts high strength, tear resistance, and a long service life. However, ordinary polyester has a stiff feel, a generally poor texture, generates significant static electricity, and exhibits poor breathability and moisture absorption. Researchers have begun to explore ways to improve and modify ordinary polyester to compensate for these shortcomings with new functionalities. A key area of ​​research is how to use polyester as the main raw material and process it to achieve a higher shrinkage rate, resulting in a lightweight and fluffy yarn that is low-cost, high-strength, lightweight, fluffy, and anti-static. Summary of the Invention

[0004] To address the issues of high strength and high shrinkage in lightweight and fluffy yarns, this application provides a method for preparing a fluffy wool-polyester blended yarn, employing the following technical solution: A method for preparing a fluffy wool-polyester blended yarn includes the following steps: Material selection: Select high-shrinkage polyester and merino wool with a mass ratio of (3.5-4.5):(5.5-6.5); Spinning: 3-5 times of blending; one combing, five-pass combing, roving, spinning, winding, oiling the winding, doubling, twisting, steaming, and dyeing to obtain worsted wool-polyester yarn.

[0005] By adopting the above technical solution, high-shrinkage polyester fiber and merino wool are selected as raw materials for blending. High-shrinkage polyester is a heat-treated modified polyester with high shrinkage, shrinking up to 35% under hot steam or high temperature. Merino wool fibers have even ends, good luster, and a soft and elastic feel, resulting in a bulky wool-polyester yarn with a full nap, soft feel, uniform fineness, and relatively high strength, further improving the strength of the worsted wool-polyester yarn and increasing the durability of the fabric. By setting and adjusting the parameters of each process and increasing the number of blending cycles, the high-shrinkage polyester and merino wool are evenly distributed in the yarn, resulting in good yarn evenness. The stress on each fiber in the yarn is relatively uniform, making it less prone to breakage. The resulting worsted wool-polyester yarn has high strength, straightness, fewer hooks, and less fiber bending, looping, folding, and entanglement. The contact area between fibers is large, making slippage less likely, and providing good cohesion and friction, thus resulting in high strength. This application uses high-shrinkage polyester as the main raw material and adjusts the ratio of high-shrinkage polyester to merino wool to accommodate the differences in the properties of the two raw materials, so that the resulting yarn has the advantages of being both fluffy and lightweight and having high strength.

[0006] In one specific feasible implementation, the fineness of the merino wool is 15-20 microns and the length is 58-70 mmH, and the fineness of the high-shrinkage polyester is 3.0-3.5 dtex.

[0007] By adopting the above technical solution, the wool and polyester fibers are relatively fine and long, with a large contact area, strong cohesion, and are not easy to slip off. The resulting yarn has a full hand feel and high elasticity. The fineness of the wool is relatively uniform, and the distribution of wool and polyester fibers in the yarn is more uniform and the arrangement is better, which further improves the strength of the yarn.

[0008] In one specific feasible implementation, the high-shrinkage polyester is treated with ammonia plasma.

[0009] By employing the above technical solution, plasma treatment etches the surface of high-shrinkage polyester, reducing its crystallinity and thus further increasing the shrinkage rate of polyester. The resulting yarn is more fluffy and lightweight. The plasma-treated polyester surface introduces more amino groups, greatly improving its hydrophilicity. Static electricity is less likely to accumulate on the polyester surface, significantly enhancing its antistatic properties. This reduces fly and shedding during the textile process, and prevents fibers from tangling during dyeing and finishing, resulting in good cohesion, high fabric quality, and improved yarn strength. At the same time, the surface area of ​​polyester is larger and rougher after etching, further improving its cohesion with wool, making the yarn less prone to pilling and improving its strength.

[0010] In one specific feasible implementation, the plasma treatment discharge power is 20-30W, and the treatment time is 45-70s.

[0011] By adopting the above technical solution, plasma treatment has good effect and simple process steps. However, excessive plasma treatment time can easily lead to loss of polyester strength.

[0012] In one specific feasible implementation, the high-shrinkage polyester undergoes a softening pretreatment, the pretreatment steps of which include: spraying a mixture of water, wool oil, and anionic softener onto the high-shrinkage polyester and allowing it to stand for 15-24 hours.

[0013] By adopting the above technical solution, the yarn sprayed with anionic softener is more fluffy and soft. Simultaneously, the anionic softener can associate with cationic dyes, reducing the alkali treatment time in the dyeing process, further improving the yarn strength and colorfastness. The softener, along with the wool oil, makes the polyester fibers smoother, softer, and more antistatic, increasing the polyester's saturation and yarn strength. Preferably, the high-shrinkage polyester of this application is softened after ammonia plasma treatment. Experiments have shown that softening after plasma treatment results in a better softening effect, reducing the amount of softener used and increasing its effectiveness. This may be because the plasma-treated polyester has better binding properties with the softener, better hydrophilicity, and a more favorable micro-nano rough surface structure for softener penetration and film formation. This application reduces process energy consumption through process settings and sequence adjustments, resulting in higher-shrinkage polyester that is softer, more antistatic, and has better colorfastness.

[0014] In one specific implementation, the mixing process includes a single application of crude oil.

[0015] By adopting the above technical solution, the blending of wool and ordinary polyester does not require an additional step of adding wool oil. However, the high-shrinkage polyester and wool of this application are blended, and an additional step of adding wool oil is added during the blending process to improve the static electricity generated during production and improve the production operation.

[0016] In one specific implementation scheme, the specific steps for oiling the winding drum include: letting the winding drum stand for 4 hours, then applying wax oil to its surface, and then placing the waxed drum in a space with a temperature of 23-26°C and a humidity of 55-65% for 8 hours to equilibrate; and then performing waxing again in the paralleling process.

[0017] By adopting the above technical solution, and by perfectly combining post-winding oiling and post-coating waxing, the worsted yarn is dust-free, has reduced fuzz, does not stick to the rollers, has fewer broken fibers, and further improves the yarn strength.

[0018] In one specific feasible implementation, the steps of skein dyeing are as follows: immerse the skein in a dyeing vat at a liquor ratio of 1:3 and dye it with cationic dyes.

[0019] By adopting the above technical solution, the dyeing is firm and uniform. When the yarn is suspended on the rod of the dyeing machine, it can be fully relaxed without any restriction. This not only allows the yarn to become completely fluffy, but also allows the yarn to untwist freely to achieve a balanced twist, thereby eliminating tension during spinning and further improving the fluffiness and strength of the yarn.

[0020] In one specific feasible implementation, two steaming processes are used, with a steaming temperature of 88-93℃, 8-12 min / time, and a vacuum degree of 70-80 kPa.

[0021] By adopting the above technical solutions, the yarn twist was stabilized, and the imbalance of internal stress and static electricity in wool were eliminated.

[0022] In summary, this application has the following beneficial effects: 1. Because this application uses merino wool and high-shrinkage polyester, by limiting the fineness and length of the wool fibers, the raw material ratio, and the setting of processes and parameters, the yarn produced has high shrinkage, high strength, antistatic properties, and fast colorfastness, and has the characteristics of being fluffy and lightweight.

[0023] 2. The high-shrinkage polyester in this application is treated with ammonia plasma, which reduces the crystallinity of the high-shrinkage polyester, thereby further increasing the shrinkage rate of the polyester. The resulting yarn is more fluffy and lightweight. The surface of the polyester after plasma treatment introduces more amino groups, which greatly improves the hydrophilicity of the polyester. Static electricity is less likely to accumulate on the surface of the polyester, which greatly improves the antistatic properties of the polyester. This reduces fly and shedding during the textile process. The fibers are less likely to become entangled during the dyeing and finishing process, resulting in good cohesion, high fabric quality, and improved yarn strength. At the same time, the surface area of ​​the polyester is larger and rougher after surface etching, which further improves the cohesion with wool, making the yarn less prone to pilling and improving strength.

[0024] 3. The polyester yarn of this application is treated with anionic softener, resulting in a softer yarn. The anionic softener can also associate with cationic dyes, reducing the alkali treatment time in the dyeing process and further improving the strength and color fastness of the yarn. By first plasma treatment and then softening treatment, the utilization rate of the softener can be improved, energy consumption can be reduced, and the softening effect can be further enhanced. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the embodiments. Unless otherwise specified, the experimental reagents used in the preparation examples, embodiments and comparative examples are all from conventional commercial brands or obtained through conventional preparation processes. All wool fibers have a fineness of 15-20 microns and a length of 58-70 mmH, and all polyester fibers have a fineness of 3.0 dtex.

[0026] Preparation Example Preparation Example 1 High-shrinkage polyester was placed in a plasma surface treatment instrument with a discharge power of 25W and a treatment time of 60s to obtain plasma-treated polyester.

[0027] Preparation Example 2 Mix 8g of water, 3g of crude oil D-HME, and 1.5g of anionic fabric softener S150, spray the mixture onto 100g of the high-shrinkage polyester prepared in Preparation Example 1, and then let it stand for 8 hours to obtain the softened polyester.

[0028] Preparation Example 3 Mix 8g of water, 3g of crude oil D-HME, and 1.5g of silicone oil softener RG-8137, spray the mixture onto 100g of the high-shrinkage polyester prepared in Preparation Example 1, and then let it stand for 8 hours to obtain softened polyester. Example

[0029] Example 1 S0: Material selection: Select high-shrinkage polyester and merino superfine wool with a mass ratio of 4:6; S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top. Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0030] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0031] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0032] In this embodiment, the high-shrinkage polyester is polyester that has not undergone plasma modification or softening treatment. Example 2 S0: Material selection: Plasma-treated polyester and Merino superfine wool in Preparation Example 1 with a mass ratio of 4:6 were selected. S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top. Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0033] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0034] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0035] Example 3 S0: Material selection: Select polyester and merino superfine wool that have undergone plasma treatment and softening treatment with anionic softener, etc., in Preparation Example 2 with a mass ratio of 4:6. S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top. Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0036] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0037] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0038] Example 4 S0: Material selection: Selected polyester and merino superfine wool that have undergone plasma treatment and silicone oil softening treatment in Preparation Example 3 with a mass ratio of 4:6. S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top. Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0039] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0040] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0041] Example 5 S0: Material selection: Select high-shrinkage polyester and merino wool with a mass ratio of 4:6; S1: Mix the above raw materials twice: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top. Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0042] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0043] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0044] The high-shrinkage polyester in this embodiment is polyester that has not undergone plasma modification or softening treatment.

[0045] Example 6 S0: Material selection: Select high-shrinkage polyester and merino wool with a mass ratio of 4:6; S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed sliver; Combing once: The mixed wool tops are fed into the combing machine, with 18 wool heads fed in at a weight of 2×18g / m, to obtain combed wool tops; Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0046] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0047] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0048] The high-shrinkage polyester in this embodiment is polyester that has not undergone plasma modification or softening treatment.

[0049] Comparative Example Comparative Example 1 S0: Material selection: Select high-shrinkage polyester with a mass ratio of 4:6 and Lincoln wool with a length of 20cm and a diameter of 40μm; S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top. Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0050] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0051] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0052] Comparative Example 2 S0: Material selection: Select polyester (non-high shrinkage conventional polyester) and merino wool in a mass ratio of 4:6; S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top. Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0053] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0054] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0055] Comparative Example 3 S0: Material selection: Select high-shrinkage polyester and merino wool with a mass ratio of 2:8; S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top. Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and thick and thin parts from fine yarn to obtain semi-finished yarn; Winding ball oiling: After storing the winding ball in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, it undergoes a precise waxing process. The waxed ball is brushed onto its surface using a brush. The waxed ball is then placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate.

[0056] Pairing: The yarns are combined and then waxed again using a uniform waxing system.

[0057] Twisting: The twist of the semi-finished yarn after winding is increased on a twisting machine to make the yarn more stable and obtain twisted yarn; Steaming: The twisted yarn is steamed twice at a temperature of 90℃ for 10 minutes each time, with a vacuum degree of 80kPa. Dyeing: Immerse the yarn in a dye bath at a ratio of 1:3 and dye the yarn with cationic dyes.

[0058] Performance testing test 1: Referring to standard GB / T 3916-2013, the breaking strength of the yarns prepared in Examples 1-6 and Comparative Examples 1-3 was tested using test method A.

[0059] Test 2: Boil the white raw yarn (without steaming or dyeing treatment) obtained in Examples 1-6 and Comparative Examples 1-3 in boiling water for 5 minutes, measure the length before washing and the length after washing, and calculate the shrinkage rate.

[0060] Table 1 Example 1 54.14 17.4 Example 2 58.47 17.7 Example 3 59.92 17.9 Example 4 58.65 16.5 Example 5 51.21 16.1 Example 6 53.38 16.3 Comparative Example 1 47.12 16.8 Comparative Example 2 14.77 16.4 Comparative Example 3 32.17 12.7 As can be seen from Examples 1-6 and Comparative Examples 1-5 and Table 1, the yarn made by using Merino wool and high-shrinkage polyester with certain process parameters has a large shrinkage rate and high strength. The resulting yarn is fluffy, soft, and has a long service life.

[0061] As can be seen from Examples 1-2 and Table 1, plasma treatment of polyester reduces its crystallinity, thereby further increasing its shrinkage rate. The resulting yarn is more fluffy and lightweight, less prone to fuzzing and tangling, has good cohesion, and high strength.

[0062] As can be seen from Examples 2-4 and Table 1, treating polyester with anionic softener results in soft, fluffy yarn that is easy to dye and has high strength.

[0063] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A method for preparing a fluffy wool-polyester blended yarn, characterized in that, The steps are as follows: S0: Material selection: High-shrinkage polyester and merino superfine wool treated with plasma and anionic softener in a mass ratio of 4:

6. S1: Mix the above raw materials three times: combine, comb, and stretch to obtain a mixed top; spray the mixed top with wool oil; comb once: feed the mixed top into a combing machine, feeding 18 strands at a weight of 2×18g / m to obtain a combed top; Five-pin comb: The combed wool top is combed with five pins to obtain straight and uniform fiber stripes; Roving: The fiber sliver combed from the needle comb is stretched 12 times, and the roller center distance is 63 / 70mm to obtain roving; Fine yarn: The roving is fed into the spinning frame, the draft is 18 times, the spacing is 53 / 59 mm, the yarn twist coefficient is 90, and the spindle speed is 8000 r / min to obtain fine yarn; Winding: The process of removing harmful fuzz, foreign fibers, and coarse and fine details from fine yarn to obtain semi-finished yarn; Winding oiling: After placing the winding balls in a space with a temperature of 25℃ and a humidity of 60% for 4 hours, a precise waxing process is performed. The waxed balls are then brushed onto the surface of the winding balls, and the waxed balls are placed in a space with a temperature of 25℃ and a humidity of 60% for 8 hours to equilibrate. Plying: The yarns are combined and then waxed again using a uniform waxing system; Double twisting: The twist of the semi-finished yarn after winding is increased on a double twisting machine to make the yarn more stable and obtain double twisted yarn; Steaming: The twisted yarn is steamed twice, with the steaming temperature at 90℃ for 10 minutes each time, and the vacuum degree at 80kPa. Dyeing: Immerse the yarn in a dye vat at a liquor ratio of 1:3 and dye the yarn with cationic dyes; The preparation steps of the high-shrinkage polyester treated with plasma and anionic softener are as follows: the high-shrinkage polyester is placed in a plasma surface treatment instrument with a discharge power of 25W and a treatment time of 60s to obtain plasma-treated polyester; 8g of water, 3g of crude oil D-HME, and 1.5g of anionic softener S150 are mixed and sprayed onto 100g of the plasma-treated polyester, and then left for 8 hours to obtain softened polyester.

2. The method for preparing the voluminous wool-polyester blended yarn according to claim 1, characterized in that: Merino Super Fine wool has a fineness of 15-20 microns and a length of 58-70 mmH, while high-shrinkage polyester has a fineness of 3.0 dtex.