A waterless dyed wool fabric and its preparation method

Abstract

This invention relates to an anhydrous dyed wool fabric and its preparation method, belonging to the field of clothing fabric technology. The fabric includes a face fabric and a biomass-based polyurethane film thermally bonded to one side of the face fabric. The face fabric is woven using nylon 66 masterbatch yarn as warp and anhydrous dyed wool yarn as weft. The anhydrous dyed wool yarn is obtained by dyeing reactive dyes onto the surface of pre-treated oxidized wool yarn using a composite heat-conducting oil as the dyeing medium. The fabric provided by this invention fully utilizes the advantages of wool fabric, and the material selection and the entire preparation process are relatively green and environmentally friendly, showing good application prospects.

Description

Technical Field

[0001] This invention belongs to the field of clothing fabric technology, specifically relating to an anhydrous dyed wool fabric and its preparation method. Background Technology

[0002] Wool offers superior comfort compared to other fibers, and wool fabrics blended with other fibers are popular with consumers. However, the unique surface morphology and structure of wool make it more difficult to dye than cotton or other fibers. Currently, wool dyeing primarily employs a boiling dyeing process, which not only consumes significant amounts of energy but also negatively impacts the quality of the wool fibers. Furthermore, the use of water as the dyeing medium in boiling dyeing results in large volumes of wastewater and substantial dye waste. Therefore, finding a greener, more environmentally friendly dyeing process that does not damage wool fibers is crucial for improving the performance of wool fabrics.

[0003] Currently, clean production dyeing technologies such as vacuum sublimation dyeing, supercritical CO2 fluid dyeing, solvent dyeing, and non-aqueous medium dyeing have emerged. However, vacuum sublimation dyeing and supercritical CO2 fluid dyeing are difficult to apply on a large scale due to the high operational complexity of the equipment. Solvent dyeing's biggest drawbacks are low dye uptake and difficulty in solvent recovery after dyeing, requiring further research for widespread application. A major advantage of non-aqueous medium dyeing technology is its very low water consumption. Because very little water is needed to dissolve dyes and other chemical reagents, the swelling of cotton fibers requires only a small amount of aqueous solution. During the dyeing process, all aqueous solutions are completely absorbed by the cotton fabric without the need for any dyeing salts, achieving salt-free dyeing of cotton fibers with reactive dyes. Regarding the recycling of non-aqueous media, after a short period of static separation, over 90% of the non-aqueous media can be directly used for the next dyeing cycle. Therefore, the entire dyeing process is very simple, and the dyeing media is easily recyclable.

[0004] Research on the application of non-aqueous dyeing media in wool fiber dyeing is currently limited. Furthermore, the microstructure of wool indicates that the cysteine ​​content in the cuticle layer of wool fibers is significantly higher than in the main cortex layer. Approximately 33% of cysteine ​​in wool is concentrated in the cuticle layer, particularly in the surface layer where it accounts for over 21% of the total amino acid content. The sulfur in cysteine ​​exists primarily as disulfide bonds (-SS-) in proteins, thus creating a network structure in the surface protein of the cuticle layer. This network structure hinders dye penetration; therefore, to ensure effective wool dyeing, this network structure needs to be disrupted. The resulting disadvantage is a loss of fiber strength. Therefore, minimizing the strength loss of wool fibers during dyeing is crucial for improving the performance of wool fabrics. Summary of the Invention

[0005] The purpose of this invention is to provide anhydrous dyed wool fabric and its preparation method in order to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions:

[0007] As a first aspect of the present invention, the present invention provides an anhydrous dyed wool fabric, the fabric comprising a face fabric and a biomass-based polyurethane film thermally bonded to one side of the face fabric; wherein, the face fabric is obtained by weaving nylon 66 masterbatch yarn as warp yarn and anhydrous dyed wool yarn as weft yarn, and the anhydrous dyed wool yarn is obtained by dyeing reactive dyes onto the surface of wool yarn that has undergone oxidation pretreatment using composite heat-conducting oil as the dyeing medium.

[0008] As a further optimization of the present invention, the nylon 66 masterbatch yarn is obtained by melt spinning of the following raw materials in the indicated mass percentages: 90-95% nylon 66 chips, 2-4% color powder, 0.5-2% inorganic filler, 0.5-1% surfactant, and 0.2-1% antioxidant.

[0009] As a further optimization of the present invention, the composite heat-conducting oil is obtained by adding rare earth oxides and sodium hyaluronate to liquid paraffin, wherein the amount of rare earth oxides added is 0.6-1.2% of the volume of liquid paraffin, and the amount of sodium hyaluronate added is 2-6% of the volume of liquid paraffin.

[0010] As a further optimization of the present invention, the rare earth oxide is lanthanum oxide or cerium oxide.

[0011] As a further optimization of the present invention, the nylon 66 color masterbatch yarn accounts for 55-65% of the mass percentage of the fabric, and the anhydrous dyed wool yarn accounts for 35-45% of the mass percentage of the fabric.

[0012] As a second aspect of the present invention, the present invention also provides a method for preparing anhydrous dyed wool fabric as described in any of the above descriptions, specifically comprising the following steps:

[0013] (1) Wool yarn is used after oxidation pretreatment;

[0014] (2) Dissolve the reactive dye in deionized water to prepare a mother liquor. Add the mother liquor to the composite heat transfer oil and shake well to obtain the dye liquor. Immerse the wool yarn treated in step (1) into the dye liquor at a liquor ratio of 1:40. First, dye at 25-30℃ for 30-40 minutes. Then, heat the yarn to 60-65℃ at a heating rate of 3-5℃ / min to fix the color for 30-60 minutes. Let it stand and cool for 30-60 minutes. Finally, wash the dyed wool yarn with soap and alternating hot and cold water to obtain anhydrous dyed wool yarn for use.

[0015] (3) Using nylon 66 color masterbatch yarn as warp yarn and the anhydrous dyed wool yarn obtained in step (2) as weft yarn, the fabric is woven to obtain the fabric.

[0016] (4) The anhydrous dyed wool fabric can be obtained by thermally bonding the biomass-based polyurethane film to one side of the fabric prepared in step (3).

[0017] As a further optimization of the present invention, in step (1), the oxidation pretreatment method of the wool yarn is as follows: the wool yarn is immersed in a peroxyformic acid aqueous solution with a volume concentration of 3-5 mL / L at a bath ratio of 1:100 and treated at 30°C for 20-30 min.

[0018] As a further optimization of the present invention, in step (3), the warp yarn weaving density is 65-90 yarns / cm, the weft yarn weaving density is 50-70 yarns / cm, and the weaving structure is plain weave.

[0019] The beneficial effects of this invention are as follows:

[0020] (1) The waterless dyed wool yarn used in this invention is obtained by dyeing reactive dyes onto the surface of wool yarn that has undergone oxidation pretreatment using composite heat-conducting oil as the dyeing medium. Compared with the traditional water bath dyeing process, it can achieve waterless dyeing and has excellent dyeing performance. The composite heat-conducting oil can be repeatedly recycled and reused, making it green and environmentally friendly.

[0021] (2) By optimizing the composition of the composite heat-conducting oil, this invention can improve the dyeing performance of wool yarn while relatively reducing the mechanical loss during the dyeing process of wool yarn, thus ensuring the mechanical properties of wool yarn and the entire wool fabric and giving full play to the advantages of wool fabric.

[0022] (3) The present invention can achieve green and environmentally friendly practices in the entire process of fabric material selection and preparation. Detailed Implementation

[0023] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Unless otherwise specified, all methods described in the following examples can be performed using conventional methods. Unless otherwise specified, all materials and reagents used can be obtained commercially.

[0025] Example 1

[0026] This embodiment provides a method for preparing anhydrous dyed wool fabric, including the following steps:

[0027] (1) Preparation of Nylon 66 color masterbatch yarn

[0028] Nylon 66 masterbatch yarn is obtained by melt spinning of the following raw materials in the indicated mass fractions: 95% nylon 66 chips, 2% color powder (selected black color powder), 2% inorganic filler (selected talc), 0.5% surfactant (selected sodium dodecylbenzene sulfonate), and 0.5% antioxidant (selected antioxidant 1076).

[0029] The preparation method of nylon 66 masterbatch yarn is as follows: First, take 20% of the total amount of nylon 66 chips and mix them with black pigment, talc and antioxidant 1076. Then, the mixture is compounded and granulated by a twin-screw extruder and air-cooled and pelletized to obtain nylon masterbatch. Next, the nylon masterbatch is mixed with the remaining nylon 66 chips to obtain a blend. Sodium dodecylbenzenesulfonate is added to the blend and then sent to a melt spinning machine for spinning to obtain nascent yarn. After the nascent yarn is drawn, nylon 66 masterbatch yarn can be obtained.

[0030] (2) Preparation of anhydrous dyed wool yarn

[0031] Oxidative pretreatment of wool yarn: Immerse the wool yarn in a 3 mL / L peroxyformic acid aqueous solution at a liquor ratio of 1:100 and treat at 30°C for 20 min. The peroxyformic acid aqueous solution is prepared by mixing formic acid and hydrogen peroxide at a volume ratio of 4:1 and keeping it at 50°C for 5 min to obtain peroxyformic acid. The peroxyformic acid is then added to deionized water and mixed evenly according to the required volume concentration.

[0032] Preparation of dyeing solution: Dissolve the reactive dye (select Reactive Black KN-B, dye index number CIReactive Black 5) in deionized water to prepare a mother liquor. Add the mother liquor to the composite heat transfer oil and shake well to obtain the dyeing solution. The concentration of the dyeing solution is controlled at 2% (owf).

[0033] The composite heat-conducting oil is obtained by adding rare earth oxides (selected lanthanum oxide) and sodium hyaluronate to liquid paraffin. The amount of lanthanum oxide added is 0.6% of the volume of liquid paraffin, and the amount of sodium hyaluronate added is 2% of the volume of liquid paraffin.

[0034] Dyeing treatment: Immerse the oxidized wool yarn (with a liquid content of 120%) in the dyeing solution, first dye it at 25℃ for 40 minutes, then heat it to 60℃ at a heating rate of 3℃ / min for 60 minutes to fix the color, let it stand and cool for 60 minutes, and finally, after the dyed wool yarn is boiled with soap and washed with alternating hot and cold water, anhydrous dyed wool yarn is obtained for use.

[0035] (3) The nylon 66 color masterbatch yarn obtained in step (1) is used as the warp yarn, and the anhydrous dyed wool yarn obtained in step (2) is used as the weft yarn. The fabric is woven to obtain the face fabric. The warp yarn has a weaving density of 90 yarns / cm, the weft yarn has a weaving density of 50 yarns / cm, and the weaving structure is plain weave. In the fabric obtained by weaving, the nylon 66 color masterbatch yarn accounts for 65% of the fabric mass, and the anhydrous dyed wool yarn accounts for 35% of the fabric mass.

[0036] (4) The anhydrous dyed wool fabric can be obtained by thermally bonding a biomass-based polyurethane film (biomass content of 40%) to one side of the fabric prepared in step (3).

[0037] Example 2

[0038] This embodiment provides a method for preparing anhydrous dyed wool fabric, including the following steps:

[0039] (1) Preparation of Nylon 66 color masterbatch yarn

[0040] Nylon 66 masterbatch yarn is obtained by melt spinning of the following raw materials in the indicated mass fractions: 93% nylon 66 chips, 4% color powder (selected black color powder), 1% inorganic filler (selected talc), 1% surfactant (selected sodium dodecylbenzene sulfonate), and 1% antioxidant (selected antioxidant 1076).

[0041] The preparation method of nylon 66 color masterbatch yarn is the same as in Example 1.

[0042] (2) Preparation of anhydrous dyed wool yarn

[0043] Oxidative pretreatment of wool yarn: The wool yarn was immersed in a 5 mL / L peroxyformic acid aqueous solution at a liquor ratio of 1:100 and treated at 20°C for 30 min. The peroxyformic acid aqueous solution was prepared by mixing formic acid and hydrogen peroxide at a volume ratio of 4:1 and keeping it at 50°C for 5 min to obtain peroxyformic acid. The peroxyformic acid was then added to deionized water and mixed evenly according to the required volume concentration.

[0044] Preparation of dye solution: The composite heat-conducting oil is obtained by adding rare earth oxides (cerium oxide) and sodium hyaluronate to liquid paraffin. The amount of cerium oxide added is 1.2% of the volume of liquid paraffin, and the amount of sodium hyaluronate added is 6% of the volume of liquid paraffin. The preparation method is the same as in Example 1.

[0045] Dyeing treatment: Immerse the oxidized wool yarn (with a liquid content of 120%) in the dyeing solution, dye it at 30°C for 30 minutes, then heat it to 65°C at a rate of 5°C / min to fix the color for 30 minutes, let it stand and cool for 30 minutes, and finally, wash the dyed wool yarn with soap and alternating hot and cold water to obtain anhydrous dyed wool yarn for use.

[0046] (3) The nylon 66 color masterbatch yarn obtained in step (1) is used as the warp yarn, and the anhydrous dyed wool yarn prepared in step (2) is used as the weft yarn. The fabric is woven to obtain the face fabric. The weaving density of the warp yarn is 65 yarns / cm, the weaving density of the weft yarn is 70 yarns / cm, the weaving structure is plain weave, the nylon 66 color masterbatch yarn accounts for 55% of the face fabric mass, and the anhydrous dyed wool yarn accounts for 45% of the face fabric mass.

[0047] Example 3

[0048] The method for preparing anhydrous dyed wool fabric provided in this embodiment differs from that in embodiment 1 in that, in step (2), the composite heat-conducting oil is obtained by adding rare earth oxides (selected lanthanum oxide) and sodium hyaluronate to liquid paraffin. The amount of lanthanum oxide added is 0.9% of the volume of liquid paraffin, and the amount of sodium hyaluronate added is 4% of the volume of liquid paraffin.

[0049] Comparative Example 1

[0050] The difference between this comparative example and Example 1 lies in the dyeing process of step (2) for the preparation of anhydrous dyed wool yarn: the reactive dye (selected as Reactive Black KN-B, dye index number CIReactive Black 5) is mixed in water to obtain a dye solution. The concentration of the dye solution is controlled at 2% (owf). The wool yarn is immersed in the dye solution at 25°C for 20 minutes. Then, the temperature is increased to 40°C at a rate of 3°C / min. NaCl is added at a rate of 50g per 1L of dye solution. The dyeing is maintained at 40°C for 40 minutes. Then, Na2CO3 is added at a rate of 15g per 1L of dye solution. The temperature is increased to 65°C at a rate of 3°C / min. The color is fixed for 60 minutes. The yarn is allowed to stand and cool for 60 minutes. Finally, the dyed wool yarn is boiled with soap and washed with alternating hot and cold water to obtain anhydrous dyed wool yarn for use.

[0051] Comparative Example 2

[0052] The only difference between this comparative example and Example 1 is the step (2) of preparing the dye solution for anhydrous dyed wool yarn: the reactive dye (selected as Reactive Black KN-B, dye index number CIReactive Black 5) is dissolved in deionized water and prepared into a mother liquor. The mother liquor is added to the composite heat-conducting oil and shaken to obtain the dye solution. The concentration of the dye solution is controlled at 2% (owf). The composite heat-conducting oil is composed only of liquid paraffin.

[0053] The mechanical properties of the fabrics prepared in Examples 1-3 and Comparative Examples 1-2 were tested. In addition, the fabrics obtained by weaving nylon 66 color masterbatch yarn as warp yarn and undyed wool yarn as weft yarn served as a control group. The composition ratio and preparation method of nylon 66 color masterbatch yarn, the weaving density of warp and weft yarns and the weaving structure of the fabric were the same as in Example 1.

[0054] The mechanical property tests were conducted as follows: A Q800 dynamic mechanical analyzer (DMA, TA Instruments, USA) was used to perform stress-strain tests on the fabric samples to determine their strength and elastic modulus. The fabric samples were cut into strips of 30×10mm and placed in a tensile fixture, with one end fixed and the other end movable. The temperature was maintained at 20℃, the frequency was set to 1Hz, and the applied stress was gradually increased from 0 at a rate of 5MPa / s. The strain change of the sample was recorded until the fabric sample fractured. The stress at the fracture point was taken as the tensile strength of the sample, and the ratio of stress to strain at the fracture point was taken as the elastic modulus of the sample. The results are shown in Table 1.

[0055] Table 1 Statistical Table of Results

[0056]

[0057] As shown in Table 1, compared with the control group which used undyed wool yarn as the weft yarn, Examples 1-3 and Comparative Examples 1-2 all used dyed wool yarn as the weft yarn. The tensile strength data of the fabrics show that Examples 1-3 and Comparative Examples 1-2 all exhibited a certain degree of decrease compared to the control group. This is because, to ensure the dyeing effect of the wool yarn, a swelling treatment was performed on the wool yarn during dyeing. However, Examples 1-3 and Comparative Examples 1-2 both used an oxidation pretreatment to achieve the swelling of the wool yarn. This method damages the disulfide bonds on the fiber surface, leading to a decrease in mechanical properties.

[0058] Comparing Examples 1-3 with Comparative Examples 1-2, it can be seen that using composite heat-conducting oil as a dyeing medium results in a smaller reduction in the mechanical properties of the fabric compared to traditional water bath dyeing processes and the use of liquid paraffin alone. This demonstrates that the composite heat-conducting oil used in this invention as a dyeing medium can reduce the impact of dyeing treatment on the strength of wool yarn, thereby ensuring the mechanical properties of the fabric.

[0059] As can be seen from the test results in Table 1, optimizing the composition of the composite heat-conducting oil can reduce the adverse effects of dyeing treatment on wool yarn. To further verify the influence of the composition selection of the composite heat-conducting oil on the mechanical and dyeing properties of anhydrous dyed wool yarn, the following verification experiments were conducted:

[0060] 1. When preparing the composite heat transfer oil, lanthanum oxide was added to the liquid paraffin at 0%, 0.6%, 0.8%, 1.0% and 1.2% of the liquid paraffin volume, and sodium hyaluronate was added at 2% of the liquid paraffin volume, to obtain composite heat transfer oils A1-A5. Then, anhydrous dyed wool yarns a1-a5 were prepared according to step (2) of the preparation steps of anhydrous dyed wool yarn disclosed in Example 1. In addition, the undyed wool yarn was used as a blank control group.

[0061] The K / S value, dyeing rate, fixation rate and yarn strength of the anhydrous dyed wool yarns a1-a5 and the dyed wool yarns prepared by comparative examples 1-2 were tested. The yarn strength of the blank control group was tested. The results are shown in Table 2.

[0062] (1) K / S value test: The colorimeter was used for testing. Each sample was measured 3 times at different positions and the average value was taken.

[0063] (2) Test of dyeing rate: Dyeing rate (E) refers to the percentage of dye adsorbed onto the fiber relative to the total amount of dye added to the dye bath. The operation method is as follows: take an appropriate amount of deionized water to extract the active dye in the composite heat conduction before and after dyeing, make up the volume and test the absorbance at the maximum absorption wavelength. Calculate the dyeing rate according to E = (1-A1 / A0) × 100%; A1 is the absorbance of the dyeing residue; A0 is the absorbance of the dyeing solution before dyeing.

[0064] (3) Fixation rate test: Fixation rate (F) refers to the percentage of dye bonded to the fiber. According to F = (K / S) 皂洗后 / (K / S) 皂洗前 Calculate the fixation rate by multiplying by 100%.

[0065] (4) Yarn strength test: The universal testing machine was used to test the yarn strength according to GB 19975-2005. The test interval was 250 mm, the tensile speed was 500 mm / min, and the test temperature was room temperature. Five test data of yarn samples breaking within the effective length range were selected and the average value was taken.

[0066] Table 2 Statistical Table of Results

[0067]

[0068]

[0069] Table 2 shows that the incorporation of rare earth oxides into the composite heat transfer oil has a positive impact on the dyeing performance of wool yarn. Specifically, the dyeing depth (K / S value) of wool yarn increases with the increase of lanthanum oxide in the composite heat transfer oil. The dyeing rate of wool yarn first increases and then decreases with the increase of lanthanum oxide in the composite heat transfer oil, reaching the optimal value when the lanthanum oxide incorporation is 1.0%. The color fixation rate of wool yarn increases with the increase of lanthanum oxide in the composite heat transfer oil. Finally, in terms of the strength of wool yarn, the wool yarn dyed from a1 to a5... The strength loss of wool yarn was less than that of the control group compared to Comparative Example 2. This shows that compared to using liquid paraffin alone as a dyeing medium, incorporating rare earth oxides and sodium hyaluronate can relatively reduce the loss of mechanical properties of wool yarn during dyeing. As can be seen from the table, when the sodium hyaluronate content is 2% and the lanthanum oxide content is 1.0%, the strength value of wool yarn is closer to that of the control group. This is because rare earth ions can form relatively stable complexes with the carboxyl groups inside the wool, and together with the repairing effect of sodium hyaluronate, the damage to the wool strength is reduced.

[0070] 2. When preparing the composite heat transfer oil, sodium hyaluronate was added to the liquid paraffin at 0%, 2%, 4% and 6% of the liquid paraffin volume, and lanthanum oxide was added at 1.0% of the liquid paraffin volume, to obtain composite heat transfer oils B1-B4. Then, anhydrous dyed wool yarns b1-b4 were prepared according to step (2) of Example 1. The dyed wool yarns obtained from the preparation of anhydrous dyed wool yarns b1-b4 were tested for K / S value, dyeing rate, fixation rate and yarn strength. The results are shown in Table 3.

[0071] Table 3 Statistical Table of Results

[0072]

[0073] As shown in Table 3, the addition of sodium hyaluronate to the composite heat transfer oil has a positive effect on promoting the mechanical properties of wool yarn. The addition of sodium hyaluronate can relatively reduce the loss of mechanical properties of wool yarn caused by dyeing treatment. However, when the addition amount exceeds 2%, the ability to repair the mechanical properties of wool yarn remains unchanged. But from the dyeing performance of wool yarn, it can be seen that when the addition amount of sodium hyaluronate exceeds 2%, sodium hyaluronate will affect the binding of dye and fiber, thus having an adverse effect on the dyeing depth, dyeing rate and fixation rate of wool yarn.

[0074] The results of the comprehensive verification test show that when using composite heat-conducting oil as the dyeing medium for dyeing wool yarn, it is possible to achieve higher dyeing depth, dyeing rate and color fixation rate compared with the traditional water bath dyeing process under low temperature dyeing process parameters. Moreover, the composite heat-conducting oil can be recycled and reused, which solves the problems of large discharge of fiber dyeing wastewater and serious dye waste from the source, laying the foundation for achieving zero discharge of dyeing wastewater and making it more green and environmentally friendly.

[0075] In addition, by optimizing the composition of the composite heat transfer oil and incorporating rare earth oxides and sodium hyaluronate, the loss of mechanical properties of wool yarn caused by dyeing can be relatively reduced. The wool yarn does not show significant changes in strength before and after dyeing, thus ensuring the mechanical properties of the finished fabric.

[0076] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A waterless dyed wool fabric, characterized in that: The fabric includes a face fabric and a biomass-based polyurethane film thermally bonded to one side of the face fabric; wherein, the face fabric is obtained by weaving nylon 66 color masterbatch yarn as warp yarn and anhydrous dyed wool yarn as weft yarn, and the anhydrous dyed wool yarn is obtained by dyeing reactive dyes onto the surface of wool yarn that has undergone oxidation pretreatment using composite heat-conducting oil as the dyeing medium. The composite heat-conducting oil is obtained by adding rare earth oxides and sodium hyaluronate to liquid paraffin, wherein the amount of rare earth oxides added is 0.6-1.2% of the volume of liquid paraffin, and the amount of sodium hyaluronate added is 2-6% of the volume of liquid paraffin. The oxidation pretreatment method for the wool yarn is as follows: immerse the wool yarn in a peroxyformic acid aqueous solution with a volume concentration of 3-5 mL / L at a bath ratio of 1:100, and treat it at 30℃ for 20-30 min.

2. The anhydrous dyed wool fabric according to claim 1, characterized in that: The nylon 66 masterbatch yarn is obtained by melt spinning the following raw materials in the indicated mass percentages: 90-95% nylon 66 chips, 2-4% color powder, 0.5-2% inorganic filler, 0.5-1% surfactant, and 0.2-1% antioxidant.

3. The anhydrous dyed wool fabric according to claim 1, characterized in that: The rare earth oxide is lanthanum oxide or cerium oxide.

4. The anhydrous dyed wool fabric according to claim 1, characterized in that: The nylon 66 color masterbatch yarn accounts for 55-65% of the mass of the fabric, and the anhydrous dyed wool yarn accounts for 35-45% of the mass of the fabric.

5. A method for preparing anhydrous dyed wool fabric as described in any one of claims 1-4, characterized in that: Specifically, the following steps are included: (1) Wool yarn is used after oxidation pretreatment; (2) Dissolve the reactive dye in deionized water to prepare a mother liquor. Add the mother liquor to the composite heat transfer oil and shake well to obtain the dye liquor. According to the liquor ratio of 1:40, immerse the wool yarn treated in step (1) into the dye liquor. First, dye at 25-30℃ for 30-40 min, then heat to 60-65℃ at a heating rate of 3-5℃ / min to fix the color for 30-60 min. Let it stand and cool for 30-60 min. Finally, after the dyed wool yarn is boiled with soap and washed with alternating hot and cold water, anhydrous dyed wool yarn is obtained for use. (3) Using nylon 66 color masterbatch yarn as warp yarn and the anhydrous dyed wool yarn obtained in step (2) as weft yarn, the fabric is woven to obtain the fabric. (4) The anhydrous dyed wool fabric can be obtained by thermally bonding the biomass-based polyurethane film to one side of the fabric prepared in step (3).

6. The method for preparing anhydrous dyed wool fabric according to claim 5, characterized in that: In step (3), the warp yarn weaving density is 65-90 yarns / cm, the weft yarn weaving density is 50-70 yarns / cm, and the weaving structure is plain weave.

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