Anti-itching wool and polyester-containing thermal fabric and preparation method thereof

Abstract

The application relates to the technical field of fabric processing, in particular to an anti-itching wool and polyester-containing warm fabric and a preparation method thereof. The anti-itching wool and polyester-containing warm fabric is woven by composite yarn in which hollow polyester wraps wool yarn, and the wool yarn is prepared by the following method: 1) washing wool, carding, combing, gilling, roving, spinning and doubling twisting to obtain raw yarn; 2) placing the pretreated raw yarn in a magnetic nano-particle dispersion solution, stirring and soaking, taking out after soaking, drying, magnetizing again to obtain magnetized raw yarn; 3) soaking the raw yarn in a softener solution, taking out after soaking, washing, drying to obtain pretreated raw yarn; and 4) electrostatically treating the magnetized raw yarn to obtain wool yarn. The wool and polyester-containing warm fabric prepared by the above process has good air and moisture permeability and warmth, and the itching phenomenon is greatly reduced, and the fabric can be used for preparing close-fitting clothes.

Description

Technical Field

[0001] This application relates to the field of fabric processing technology, and more specifically, to an anti-itch thermal fabric containing wool and polyester and a method for preparing the same. Background Technology

[0002] Wool has good moisture absorption and warmth retention properties, so it is often used in thermal clothing. However, wool can cause itching when worn, so it is generally not used for underwear.

[0003] To make wool suitable for use in underwear, three main methods are currently employed: fiber refinement and selection, chemical scaling and modification, and blending for insulation. I. By cultivating superfine Merino wool varieties with fiber diameters below 19.5μm, the mechanical irritation of coarse fibers to the skin is reduced from the source. The advantages of this method are a naturally soft feel, no need for additional chemical treatment, optimal environmental friendliness, and complete preservation of wool's natural moisture absorption, temperature regulation, and warmth retention properties. The disadvantages are low yield, long breeding cycle, high raw material prices, and a genetic limit to fineness improvement, making large-scale adoption difficult. II. Using a combination of chlorination-resin treatment or protease treatment to remove or passivate the scale layer on the wool surface to reduce the directional friction coefficient. The advantages of this method are mature technology, controllable cost, significant shrinkage prevention effect, and the ability to process ordinary wool in batches. The disadvantages are that the chlorination process generates wastewater that can absorb organic halides, posing environmental pollution problems; chemical treatment may weaken fiber strength and reduce durability; and some consumers have concerns about chemical residues on their skin. III. Blending wool with fine fibers such as silk and modal, using the latter to wrap and isolate the wool to reduce direct contact. The advantages of this method are flexible technology, large cost adjustment range, and the ability to balance warmth and skin-friendliness, making it one of the most commonly used methods in the industry. However, the drawback of this method is that an excessively high blending ratio will greatly dilute the wool's moisture absorption, breathability, and warmth retention. Summary of the Invention

[0004] To address the issue that blending wool with delicate fibers such as silk and modal reduces the moisture absorption, breathability, and warmth retention of wool, this application provides an anti-itch warm fabric containing wool and polyester, and a method for preparing the same.

[0005] In a first aspect, this application provides an anti-itch thermal fabric containing wool and polyester, employing the following technical solution: An anti-itch warm fabric containing wool and polyester, wherein the anti-itch warm fabric is woven from a composite yarn of hollow polyester wrapped with wool yarn, and the wool yarn is prepared by the following method: 1) The wool is washed, combed, finely combed, pin-combed, roving, spinning and twisting to obtain raw yarn; 2) Place the pretreated raw yarn in a magnetic nanoparticle dispersion, stir and soak it. After soaking, take it out, dry it, and then magnetize it to obtain magnetized raw yarn. 3) Soak the raw yarn in a softener solution. After soaking, take it out, wash it with water, and dry it to obtain the pretreated raw yarn. 4) Electrostatic treatment is performed on the magnetized yarn to obtain wool yarn.

[0006] By adopting the above technical solution, a wool and polyester thermal fabric with good breathability, moisture permeability, and warmth retention is obtained, while greatly reducing itching. It can be used in the preparation of underwear.

[0007] Firstly, the itching sensation caused by wool fabric stems from the layers of keratinous scales on the wool surface. Ordinary wool scales have hard, raised edges, which repeatedly rub and scratch against delicate skin when worn close to the skin, causing dryness, itching, and stinging. This application addresses this by first pre-treating the wool yarn with magnetic nanoparticles, allowing the nanoparticles to be evenly adsorbed and penetrate into the gaps in the scale layer on the fiber surface. Subsequently, the yarn with the adsorbed magnetic particles is magnetized in a strong magnetic field environment. At this point, the magnetic nanoparticles attached to the scale edges or surface align directionally under the influence of the Lorentz force and the interaction of magnetic moments. This causes the originally disordered, outwardly raised or protruding wool scales to smoothly align along the fiber axis, and even to some extent retract or lie flat. The coefficient of friction on the wool fiber surface is reduced, eliminating the itching sensation caused by the mechanical pricking and directional friction of the scale edges against the skin. Simultaneously, the natural structure of the wool fiber and the moisture-absorbing and heat-retaining properties of the internal medulla layer are fully preserved.

[0008] Meanwhile, the hollow polyester filament, acting as the outer fiber, forms a dense and smooth insulating layer on the fabric surface, effectively preventing direct contact between wool fibers and the skin, greatly reducing itching. Furthermore, the excellent bulk and resilience of hollow polyester itself create a stable, still air insulation layer, further enhancing the fabric's warmth retention and compensating for the reduced warmth caused by simple blends.

[0009] Secondly, while wool yarn is breathable, moisture-wicking, and warm, it has low strength and is prone to felting, shrinking, and pilling. This solution utilizes high-strength hollow polyester as the outer yarn, giving the covered yarn excellent tensile strength and abrasion resistance. The addition of hollow polyester not only limits excessive displacement of wool fibers during friction, effectively suppressing the fabric's pilling tendency, but also counteracts wool's tendency to shrink when wet through the dimensional stability of polyester.

[0010] Electrostatic treatment can eliminate the accumulation of static electricity in magnetized yarn, prevent yarn entanglement and dust adsorption, improve spinnability and fabric cleanliness, and at the same time give the finished product antistatic properties, enhancing wearing comfort.

[0011] Finally, the hollow polyester-covered wool yarn not only retains the excellent physiological comfort of wool, but also solves the problem of itching when wearing wool close to the skin through physical isolation and surface regularization. In the end, a functional close-fitting fabric with high warmth retention, super skin-friendliness and good durability is obtained.

[0012] Preferably, the magnetization conditions in step 2) are as follows: The magnetic field strength is 0.3-0.8T, the magnetization temperature is 40-60℃, and the magnetization time is 30-60min.

[0013] By employing the above technical solution, a suitable magnetic field drives magnetic nanoparticles to align on the fiber surface and induces the scale layer to conform to the grain, effectively reducing the coefficient of friction. A suitable temperature softens the wool keratin structure, enhancing its plasticity under external force and allowing for more thorough scale morphology adjustment. A suitable time ensures sufficient penetration of the magnetic field and uniform particle distribution, preventing rebound due to insufficient treatment. These three factors work synergistically to achieve deep softening of the wool's microstructure without chemical damage.

[0014] Preferably, the magnetic nanoparticle dispersion uses water as a solvent and consists of the following components at the following concentrations: Inorganic salts 4-6g / L Magnetic nanoparticles 5-15g / L stabilizer 2-4g / L Crosslinking agent 0.5-1.5 g / L pH adjuster 1-2g / L.

[0015] By employing the above technical solution, the high efficiency and stability of the magnetization treatment are ensured. Inorganic salts adjust the ionic strength of the solution, promoting the adsorption of magnetic nanoparticles on the wool surface; stabilizers effectively prevent nanoparticle aggregation, ensuring their uniform dispersion in the aqueous phase; crosslinking agents enhance the adhesion and wash resistance of the magnetic particles; and pH adjusters maintain the stability of the system's acidity and alkalinity, optimizing the reactivity of each component. This formulation enables magnetic nanoparticles to be uniformly and firmly loaded onto the fiber surface, providing a foundation for the subsequent orderly arrangement of scales under magnetic field induction, thereby achieving a long-lasting anti-itch effect.

[0016] Preferably, the crosslinking agent is glutaraldehyde or citric acid.

[0017] By adopting the above technical solutions, the bonding strength between magnetic nanoparticles and wool fibers can be effectively enhanced. Glutaraldehyde, as a bifunctional crosslinking agent, has high reactivity and can form stable covalent bonds with wool keratin and nanoparticle surface groups, ensuring the durability of the magnetization effect. Citric acid, with its multi-carboxyl structure, can undergo esterification or complexation crosslinking with fibers and particles under mild conditions. It is not only environmentally friendly and non-toxic, but also improves the softness of fibers while crosslinking.

[0018] Preferably, the stabilizer is composed of polyvinylpyrrolidone and sodium oleate in a weight ratio of 3-6:1.

[0019] By employing the above technical solution, the dispersion stability and loading uniformity of magnetic nanoparticles in the aqueous phase are improved. PVP, as a nonionic polymeric stabilizer, effectively prevents nanoparticle aggregation due to its excellent steric stabilization effect; sodium oleate enhances colloidal stability through electrostatic repulsion. The two are compounded in a 3-6:1 ratio, possessing both electrostatic repulsion and steric stabilization mechanisms, enabling the magnetic nanoparticles to be uniformly and firmly adsorbed onto the surface of wool fibers. This provides a high-quality interfacial foundation for the subsequent orderly arrangement of scales induced by a magnetic field, thereby ensuring the long-lasting and stable anti-itch effect.

[0020] Preferably, the magnetic nanoparticles include at least one of Fe3O4, γ-Fe2O3, and MFe2O4.

[0021] By employing the above technical solution, wool can be endowed with excellent magnetic responsiveness. Under the influence of a magnetic field, the magnetic force generated by the particles can induce the wool scales to align in a regular manner, effectively reducing the coefficient of friction and achieving long-lasting anti-itch properties. Simultaneously, these particles possess good biocompatibility and chemical stability, ensuring that the processing is green and environmentally friendly, leaving no toxic residues, and does not affect the wool's natural warmth and moisture-wicking properties.

[0022] Preferably, the magnetic nanoparticles have an average particle size of 10-100 nm.

[0023] By adopting the above technical solution, the average particle size of the magnetic nanoparticles is optimized to give them a high specific surface area and good magnetic properties. Under an external magnetic field, the particles can respond quickly and generate directional alignment force, effectively inducing the wool scale layer to flatten and reducing the coefficient of friction. At the same time, the nanoscale size allows them to fully penetrate and uniformly load on the fiber surface and between the scales, avoiding physical accumulation. Thus, without damaging the wool's strength, the softness of the touch and the long-lasting stability of the magnetization effect are achieved.

[0024] Secondly, this application provides a method for preparing an anti-itch warm fabric containing wool and polyester, using the following technical solution: A method for preparing an anti-itch thermal fabric containing wool and polyester includes the following preparation steps: S1. Wool yarn is used as the core yarn and is drawn at a constant speed by rollers, then guided through the center of a high-speed rotating hollow spindle. At the same time, hollow polyester yarn is used as the outer yarn and is wound around the hollow spindle. It rotates at high speed with the spindle and tightly wraps around the surface of the continuously moving wool core yarn in a spiral shape. The resulting polyester wool covered yarn is pulled by the yarn guide shaft and evenly wound onto the bobbin to obtain the composite yarn. S2. Weave the composite yarn into fabric to obtain the finished product.

[0025] By adopting the above technical solution, hollow polyester effectively wraps the wool yarn, isolating the wool yarn from contact with the skin, reducing fabric irritation, and making the fabric comfortable to wear close to the skin. At the same time, it improves the fabric's breathability, moisture permeability, and warmth, and effectively prevents the wool yarn from pilling, felting, and deforming.

[0026] Preferably, in step S1, before the hollow polyester outer yarn is wrapped, a layer of water-soluble polyvinyl alcohol fiber is first wrapped on the surface of the wool core yarn as an isolation buffer layer. The amount of the isolation buffer layer is 3%-8% of the mass of the wool core yarn. The water-soluble polyvinyl alcohol fiber is dissolved and removed in the subsequent washing process, forming a fluffy air layer of 0.05-0.15mm between the wool core yarn and the polyester outer yarn.

[0027] By adopting the above technical solution, during the spinning stage, the isolation layer effectively buffers the radial compression of the polyester outer yarn on the wool core yarn, preventing the wool fibers from losing their fluffiness and elasticity due to excessive compaction. In the subsequent washing process, the 0.05-0.15mm micro-voids left after the polyvinyl alcohol is dissolved and removed form a stable static air insulation layer, which improves the fabric's warmth retention efficiency and also gives the yarn better softness, resilience, and breathability, achieving synergistic optimization of lightweight, high fluffiness, and warmth retention.

[0028] Preferably, the weight ratio of the wool yarn to the hollow polyester fiber is 3-5:1.

[0029] By adopting the above technical solutions, the high wool content ensures the fabric's heat retention and moisture absorption and breathability, preserving the comfortable feel of wool; while an appropriate amount of hollow polyester outer layer can form a complete physical isolation layer to reduce itching, and the hollow structure can improve fluffiness and warmth retention efficiency, avoiding the stiff feel or reduced breathability caused by too much polyester, so that the fabric has both the warmth of wool and the lightness and warmth of chemical fibers.

[0030] Preferably, the covering helix angle of the outer covering yarn is 25°-40°, and the covering rate is 85%-95%.

[0031] By adopting the above technical solution, the appropriate helix angle ensures both the tight binding of the polyester outer yarn to the wool core yarn, preventing wool fibers from protruding during wear and friction, and avoids yarn stiffness caused by an excessively large angle. The appropriate coverage rate of the continuous physical isolation layer effectively blocks direct contact between the wool and the skin, completely eliminating itching; at the same time, the retained micro-gap structure ensures the fabric's breathability and moisture-wicking properties, preventing stuffiness and ensuring that the fabric provides both ultimate skin-friendliness and a comfortable, breathable wearing experience.

[0032] In summary, this application has the following beneficial effects: This application utilizes magnetic nanoparticle pretreatment combined with magnetization induction to smoothly align and inwardly adhere wool scales along the fiber axis, effectively reducing the surface friction coefficient and minimizing itching, while fully preserving the wool's moisture-wicking and warmth-retaining properties. Combined with a dense, smooth insulating layer formed by a hollow polyester outer layer, this double-layer barrier prevents direct contact between the wool and skin, further reducing itching. The hollow structure also creates a stable, static air insulation layer, further enhancing warmth retention. The hollow polyester outer yarn also imparts excellent tensile strength, abrasion resistance, and dimensional stability to the fabric, effectively inhibiting pilling and felting. Electrostatic treatment eliminates static electricity buildup, improving spinnability and cleanliness. The final result is a functional close-fitting fabric that combines high warmth retention, superior skin-friendliness, and excellent durability. Detailed Implementation Example

[0033] Example 1

[0034] An anti-itch thermal fabric containing wool and polyester is prepared by the following method: S1. Wool yarn is used as the core yarn and is drawn at a constant speed by rollers, then guided through the center of a high-speed rotating hollow spindle. At the same time, hollow polyester yarn is used as the outer yarn and is wound around the hollow spindle. It rotates at high speed with the spindle and tightly wraps around the surface of the continuously moving wool core yarn in a spiral shape. The resulting polyester wool covered yarn is pulled by the yarn guide shaft and evenly wound onto the bobbin to obtain the composite yarn. The weight ratio of wool yarn to hollow polyester fiber is 3:1; The outer covering yarn has a helix angle of 25° and a coverage rate of 85%. Wool yarn is prepared by the following method: 1) The wool is washed, combed, finely combed, pin-combed, roving, spinning and twisting to obtain raw yarn; 2) Place the pretreated raw yarn in a magnetic nanoparticle dispersion, stir and soak it. After soaking, take it out, dry it, and then magnetize it to obtain magnetized raw yarn. The magnetic nanoparticle dispersion uses water as a solvent and consists of the following components at the following concentrations: Inorganic salts 4g / L Magnetic nanoparticles 5g / L stabilizer 2g / L Crosslinking agent 0.5 g / L pH adjuster 1g / L; Step 2) The magnetization conditions are as follows: The magnetic field strength is 0.3T, the magnetization temperature is 40℃, and the magnetization time is 30min; The stabilizer is composed of polyvinylpyrrolidone and sodium oleate in a weight ratio of 3:1; The crosslinking agent is glutaraldehyde; The magnetic nanoparticles are Fe3O4; The magnetic nanoparticles have an average particle size of 10 nm. The raw yarn is soaked in a softener solution. After soaking, it is taken out, washed with water, and dried to obtain pretreated raw yarn. The softener solution is XT-5176-1, a product of Guangdong Xiangtao High-Tech Materials Technology Co., Ltd.

[0035] 4) Electrostatic treatment is performed on the magnetized yarn to obtain wool yarn; S2. Weave the composite yarn into fabric to obtain the finished product.

[0036] The difference between Examples 2-3 and Example 1 lies in the types, amounts, and parameters of raw materials used to prepare the anti-itch thermal fabric containing wool and polyester. The specific differences are shown in Table 1. Table 1. Raw material types, dosages, and parameters for preparing anti-itch thermal fabrics containing wool and polyester. Example

[0037] An anti-itch warm fabric containing wool and polyester is disclosed in this embodiment, which differs from Embodiment 1 in that, before the hollow polyester outer yarn is wrapped in step S1, a layer of water-soluble polyvinyl alcohol fiber is first wrapped on the surface of the wool core yarn as an isolation buffer layer. The amount of the isolation buffer layer is 3% of the mass of the wool core yarn. The water-soluble polyvinyl alcohol fiber is dissolved and removed in the subsequent washing process, forming a fluffy air layer of 0.05 mm between the wool core yarn and the polyester outer yarn.

[0038] Example 5 An anti-itch warm fabric containing wool and polyester is disclosed. The difference between this embodiment and Embodiment 1 is that, before the hollow polyester outer yarn is wrapped in step S1, a layer of water-soluble polyvinyl alcohol fiber is first wrapped on the surface of the wool core yarn as an isolation buffer layer. The amount of the isolation buffer layer is 8% of the mass of the wool core yarn. The water-soluble polyvinyl alcohol fiber is dissolved and removed in the subsequent washing process, forming a 0.15mm fluffy air layer between the wool core yarn and the polyester outer yarn.

[0039] Example 6 An anti-itch thermal fabric containing wool and polyester, the difference between this embodiment and Embodiment 1 is that the magnetization conditions in step 2) are as follows: The magnetic field strength is 0.2T, the magnetization temperature is 40℃, and the magnetization time is 30min.

[0040] Example 7 An anti-itch warm fabric containing wool and polyester, the difference between this embodiment and Example 1 is that the concentration of inorganic salts in the magnetic nanoparticle dispersion is 0.

[0041] Example 8 An anti-itch warm fabric containing wool and polyester, the difference between this embodiment and Example 1 is that the magnetic nanoparticle dispersion contains 3g / L of magnetic nanoparticles.

[0042] Example 9 An anti-itch warm fabric containing wool and polyester, the difference between this embodiment and Embodiment 1 is that the average particle size of the magnetic nanoparticles is 0.1 mm.

[0043] Example 10 An anti-itch warm fabric containing wool and polyester, the difference between this embodiment and Embodiment 1 is that the covering helix angle of the outer yarn is 15°.

[0044] Example 11 An anti-itch thermal fabric containing wool and polyester, the difference between this embodiment and embodiment 1 is that the weight ratio of wool yarn and hollow polyester fiber is 1:1.

[0045] Comparative Example Comparative Example 1 An anti-itch warm fabric containing wool and polyester, the difference between this comparative example and Example 1 is that purified water is used instead of magnetic nanoparticle dispersion.

[0046] Comparative Example 2 A wool and polyester insulating fabric that is itch-resistant. The difference between this comparative example and Example 1 is that step 3 is omitted.

[0047] Comparative Example 3 A wool and polyester insulating fabric that is itch-resistant. The difference between this comparative example and Example 1 is that the order of steps 2) and 3) is reversed, as follows: 2) Soak the raw yarn in a softener solution. After soaking, take it out, wash it with water, and dry it to obtain the pretreated raw yarn. 3) Place the pretreated raw yarn in a magnetic nanoparticle dispersion, stir and soak it. After soaking, take it out, dry it, and then magnetize it to obtain magnetized raw yarn.

[0048] Detection methods / test methods Air permeability: Refer to GB / T 5453-2025 "Determination of air permeability of textile fabrics"; Moisture permeability: Refer to GB / T 12704.1-2009 "Textiles - Test methods for moisture permeability of fabrics - Part 1: Moisture absorption method"; Thermal insulation: Refer to GB / T 11048 "Determination of thermal and moisture resistance of textiles under steady-state conditions for physiological comfort"; Itching sensation: Ten men and ten women aged 20-25 years were selected as subjects for sensory evaluation of itching sensation. The fabric was fixed to the subjects' necks for 20 minutes, and the itching sensation was scored. The itch sensation evaluation scale is as follows: 1. Not itchy at all; 2. Not itchy; 3. Not itchy at all; 4. Neutral; 5. Somewhat itchy; 6. Itchy; 7. Very itchy. The average score was calculated.

[0049] Wash resistance test: Following GB / T 8629 "Test Procedures for Textiles - Household Washing and Drying", the product was washed 50 times in a Type A standard washing machine and hung to dry, followed by a test for itching sensation. Experimental data are shown in Table 2. Table 2 Experimental data of Examples 1-11 and Comparative Examples 1-3

[0050] As can be seen from the above experimental data, the fabric prepared by the method of this application maintains good breathability, moisture permeability and warmth retention while having a good non-itchy effect.

[0051] Comparing Example 1 and Comparative Examples 1-3, the itching score of Comparative Examples 1-3 is much higher than that of Example 1. It can be seen that the present application first magnetizes the fabric and then treats it with a softener, which greatly improves the itching sensation of the wool fabric, and at the same time helps to improve the breathability, moisture permeability and warmth retention of the fabric.

[0052] Comparing Examples 1 and 4-5, it is evident that the PVA isolation buffer layer introduced during the spinning stage can effectively buffer the radial compression of the hollow polyester outer yarn on the wool core yarn, preventing the wool fibers from losing their fluffiness and elasticity due to excessive compaction. After the PVA is dissolved and removed in the subsequent washing process, the micro-gaps formed between the core yarn and the outer yarn not only further block the direct contact between the residual wool scales and the skin through physical isolation, reducing itching, but also further improve the breathability and moisture wicking performance of the fabric. At the same time, the low thermal conductivity of still air greatly enhances the fabric's warmth retention efficiency.

[0053] Comparing Examples 1 and 6-11, Example 6 reduced the magnetic field strength to 0.2T, increasing the itching score to 2.8, indicating that insufficient magnetic field strength weakens the Lorentz force and magnetic moment interaction of magnetic nanoparticles, failing to effectively drive the scale layer to adhere in the correct direction. Example 7 removed inorganic salts, increasing the itching score to 2.5, demonstrating that inorganic salts play an important role in regulating ionic strength and promoting uniform adsorption of nanoparticles on the wool surface. Example 8 reduced the magnetic nanoparticle concentration to 3g / L, increasing the itching score to 2.6, proving that insufficient particle loading leads to a decrease in scale regularity. Example 9 used 0.1μm particle size, increasing the itching score to 3.2, indicating that micron-sized particles cannot effectively penetrate the gaps between scales and are prone to physical accumulation. Example 10 reduced the covering helix angle to 15°, increasing the itching score to 3.5, indicating that an excessively small helix angle leads to insufficient binding of the outer yarn and easy protrusion of wool fibers. Example 11 reduced the wool to polyester weight ratio to 1:1, decreasing the moisture permeability to 5800. The wool content decreased to g / (m².h) and the warmth retention dropped to 0.140 m².K / W, proving that too low a wool content will weaken the moisture absorption and warmth retention performance of the fabric.

[0054] 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. An anti-itch, warm fabric containing wool and polyester, characterized in that, The anti-itch warm fabric containing wool and polyester is woven from a composite yarn of hollow polyester wrapped with wool yarn, and the wool yarn is prepared by the following method: 1) The wool is washed, combed, finely combed, pin-combed, roving, spinning and twisting to obtain raw yarn; 2) Place the pretreated raw yarn in a magnetic nanoparticle dispersion, stir and soak it. After soaking, take it out, dry it, and then magnetize it to obtain magnetized raw yarn. 3) Soak the raw yarn in a softener solution. After soaking, take it out, wash it with water, and dry it to obtain the pretreated raw yarn. 4) Electrostatic treatment is performed on the magnetized yarn to obtain wool yarn.

2. The anti-itch warm fabric containing wool and polyester according to claim 1, characterized in that: The magnetization conditions for step 2) are as follows: The magnetic field strength is 0.3-0.8T, the magnetization temperature is 40-60℃, and the magnetization time is 30-60min.

3. The anti-itch warm fabric containing wool and polyester according to claim 2, characterized in that, The magnetic nanoparticle dispersion uses water as a solvent and consists of the following components at the following concentrations: Inorganic salts 4-6g / L Magnetic nanoparticles 5-15g / L stabilizer 2-4g / L Crosslinking agent 0.5-1.5 g / L pH adjuster 1-2g / L.

4. The anti-itch warm fabric containing wool and polyester according to claim 1, characterized in that: The magnetic nanoparticles have an average particle size of 10-100 nm.

5. The anti-itch warm fabric containing wool and polyester according to claim 4, characterized in that: The crosslinking agent is glutaraldehyde or citric acid.

6. The anti-itch warm fabric containing wool and polyester according to claim 4, characterized in that, The stabilizer is composed of polyvinylpyrrolidone and sodium oleate in a weight ratio of 3-6:

1.

7. A method for preparing an anti-itch, wool and polyester thermal fabric as described in any one of claims 1-6, characterized in that, The preparation steps include the following: S1. Wool yarn is used as the core yarn and is drawn at a constant speed by rollers, then guided through the center of a high-speed rotating hollow spindle. At the same time, hollow polyester yarn is used as the outer yarn and is wound around the hollow spindle. It rotates at high speed with the spindle and tightly wraps around the surface of the continuously moving wool core yarn in a spiral shape. The resulting polyester wool covered yarn is pulled by the yarn guide shaft and evenly wound onto the bobbin to obtain the composite yarn. S2. Weave the composite yarn into fabric to obtain the finished product.

8. The method for preparing the anti-itch warm fabric containing wool and polyester according to claim 7, characterized in that, In step S1, before the hollow polyester outer yarn is wrapped, a layer of water-soluble polyvinyl alcohol fiber is first wrapped on the surface of the wool core yarn as an isolation buffer layer. The amount of the isolation buffer layer is 3%-8% of the mass of the wool core yarn. The water-soluble polyvinyl alcohol fiber is dissolved and removed in the subsequent washing process, forming a fluffy air layer of 0.05-0.15mm between the wool core yarn and the polyester outer yarn.

9. The method for preparing the anti-itch warm fabric containing wool and polyester according to claim 7, characterized in that: The weight ratio of the wool yarn to the hollow polyester fiber is 3-5:

1.

10. The method for preparing the anti-itch warm fabric containing wool and polyester according to claim 7, characterized in that: The outer covering yarn has a covering helix angle of 25°-40° and a covering rate of 85%-95%.

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