Pearl yarn, fabric and preparation method thereof

Abstract

The invention relates to a pearlescent yarn, a fabric and a preparation method thereof.Raw material yarn is soaked with pearlescent slurry and then dried, a pearlescent coating is formed on the surface of the raw material yarn, and the pearlescent yarn is obtained; the pearlescent slurry contains 40-70 wt% of waterborne polyurethane resin, 0.1-1 wt% of a pH regulator, 2-6 wt% of ethylene glycol, 0.5-1.8 wt% of a defoaming agent, 2-5 wt% of a wetting dispersant, 1-5 wt% of fumed silica, 3-11% of pearl powder, 1-3% of a curing agent and the balance of water. Different from the prior art, the pearlescent slurry prepared by mixing the waterborne polyurethane resin and the pearlescent powder and adding the auxiliaries is used for dipping the raw material yarn, a light, thin and firm pearlescent coating can be rapidly formed, and the spinnability of the yarn is improved. The pearlescent yarns can also be blended with common yarns, so that the air permeability of the fabric is kept while the pearlescent effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of textiles, and in particular to a pearlescent yarn, a fabric and a preparation method thereof. Background Art

[0002] In clothing design, pearl yarn is often used to make high-end fashions, evening gowns, etc., which can significantly enhance the overall grade and fashion sense of clothing. Pearl yarn is also often used to make curtains, carpets and other household items, which can add a sense of luxury to the home environment. In the production of decorations, pearl yarn can be used to make various decorations, such as necklaces, bracelets, etc., which have high ornamental value and collection value. With consumers' pursuit of fashion and personalization, the market demand for pearl yarn continues to grow.

[0003] In the traditional pearlescent yarn preparation process, the pearlescent powder cannot be directly granulated and spun because of its large particle size. It is also difficult to fix through the yarn, easy to detach, and not spinnable. Therefore, in industrial production, it is generally used to print on the woven fabric with a coating containing pearlescent powder, but the pattern printed in this way is relatively dull, which also affects the breathability of the fabric and the wearing experience of customers. Summary of the invention

[0004] In view of the above problems, the present application provides a new pearlescent yarn, fabric and preparation method thereof. The raw yarn is impregnated with a pearlescent slurry prepared with water-based polyurethane resin and pearlescent powder to form a thin and firm pearlescent coating, thereby increasing the spinnability of the yarn. In addition, the pearlescent yarn can also be blended with ordinary yarn to achieve a pearlescent effect while maintaining the air permeability of the fabric.

[0005] The first aspect of the present application provides a method for preparing pearlescent yarn, wherein a raw yarn is impregnated with a pearlescent slurry and then dried to form a pearlescent coating on the surface of the raw yarn to obtain the pearlescent yarn; the pearlescent slurry contains 40-70wt% of an aqueous polyurethane resin, 0.1-1wt% of a pH adjuster, 2-6wt% of ethylene glycol, 0.5-1.8wt% of a defoaming agent, 2-5wt% of a wetting and dispersing agent, 1-5wt% of fumed silica, 3-11% of pearlescent powder, 1-3% of a curing agent, and the remainder is water.

[0006] Different from the existing technology, the raw yarn is impregnated with a pearlescent slurry prepared by mixing water-based polyurethane resin with pearlescent powder and adding additives, which can quickly form a light, thin and firm pearlescent coating and improve the spinnability of the yarn.

[0007] Furthermore, the waterborne polyurethane resin is an anionic polyether aliphatic polyurethane with a solid content of 45-55wt%.

[0008] Furthermore, the content of the waterborne polyurethane resin is 50-60%.

[0009] Furthermore, the pearl powder has a particle size of 40-150 um and a content of 5-8 wt%.

[0010] Furthermore, the curing agent is a water-dispersible isocyanate curing agent.

[0011] Furthermore, the pH of the pearlescent slurry is 6-8, and the viscosity is 6000-30000 cps.

[0012] Furthermore, the impregnation time of the raw yarn is 0.1-1s, and the drying temperature is 120°C.

[0013] The second aspect of the present application provides a pearlescent yarn, which is prepared by the preparation method described in the first aspect of the present application.

[0014] Furthermore, the thickness of the pearlescent coating is 100-500um.

[0015] Different from the existing technology, the pearlescent coating in the pearlescent yarn firmly wraps the yarn, the pearlescent powder will not fall off during the spinning process, and can significantly reduce the hairiness of the yarn and improve the spinnability of the yarn. The pearlescent coating gives the yarn a unique appearance and greatly improves the beauty of the yarn.

[0016] The third aspect of the present application provides a pearlescent fabric, which is woven using the pearlescent yarn described in the second aspect of the present application.

[0017] Different from the existing technology, pearlescent fabric is woven with pearlescent yarn, and can have pearlescent effect on one side or both sides; pearlescent yarn can also be blended with ordinary yarn, so that the fabric has pearlescent effect and is also breathable.

[0018] The above-mentioned records related to the invention content are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the written contents of the specification, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the specific implementation mode and drawings of the present application are explained below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0020] In the drawings of the specification:

[0021] Figure 1 It is a schematic diagram of the sizing machine equipment and process flow. DETAILED DESCRIPTION

[0022] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0023] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0024] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0025] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0026] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0027] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0028] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0029] The first aspect of the present application provides a method for preparing pearlescent yarn, wherein a raw yarn is impregnated with a pearlescent slurry and then dried to form a pearlescent coating on the surface of the raw yarn to obtain the pearlescent yarn; the pearlescent slurry contains 40-70wt% of an aqueous polyurethane resin, 0.1-1wt% of a pH adjuster, 2-6wt% of ethylene glycol, 0.5-1.8wt% of a defoaming agent, 2-5wt% of a wetting and dispersing agent, 1-5wt% of fumed silica, 3-11% of pearlescent powder, 1-3% of a curing agent, and the remainder is water.

[0030] If the polyurethane resin content is too low, the slurry viscosity will be too low and cannot be sizing. If the polyurethane resin content is too high, the slurry viscosity will be too high, affecting the leveling effect of the slurry and causing uneven distribution of yarn thickness.

[0031] Ethylene glycol solution can adjust the solubility and drying speed of the product, and avoid the slurry from drying too quickly in the air environment.

[0032] Defoamers can adjust the defoaming properties of products and reduce the bubbles generated by pearlescent powder during the mixing process. If the amount of defoamer added is too small, the defoaming effect is not significant, affecting the use of the slurry; if the amount is too large, oil spots may be generated, affecting the gloss and transparency of the coating.

[0033] Wetting and dispersing agents can improve the dispersibility of solid particles in the slurry, making the particles evenly dispersed, improving stability, and preventing agglomeration. They can also affect rheological properties and adjust viscosity. When its content is low, the dispersion effect of pearlescent powder solid particles is poor and they are easy to agglomerate, which indirectly affects fluidity and stability. When its content is high, oversaturation affects dispersion, excessively changes rheological properties, and may affect chemical stability. When the content is appropriate, good dispersion can be achieved, rheological properties can be optimized, and stability can be improved. Too low a wetting agent content will cause the pearlescent yarn to lose powder.

[0034] Fumed silica is used to adjust the rheology and thixotropy of the product.

[0035] When the content of pearl powder is low, the pearlescent effect in the slurry is weak and it is difficult to meet strong decorative needs; when the content is too high, it will affect the spinnability and the uniformity of its dispersion in the slurry, and agglomeration will occur, resulting in excessive pearlescence in some parts and unevenness in other parts, which will also increase costs.

[0036] The role of the curing agent in the slurry includes promoting the curing reaction, reacting with the slurry components to form a cross-linked structure, and accelerating the curing speed; improving physical properties, enhancing mechanical properties, and improving chemical stability; improving bonding properties and enhancing bonding to the substrate.

[0037] Too little or too much curing agent will lead to incomplete curing or over-curing. Incomplete curing will make the performance of the slurry fail to meet the expected requirements, such as insufficient strength, poor chemical resistance, etc. Over-curing may cause the material to become brittle and reduce toughness.

[0038] Different from the prior art, the raw yarn is impregnated with a pearlescent slurry prepared by mixing water-based polyurethane resin with pearlescent powder and adding additives, which can quickly form a light, thin and firm pearlescent coating and increase the spinnability of the yarn.

[0039] Furthermore, the configuration of the pearlescent slurry includes the following steps: mixing waterborne polyurethane resin, ethylene glycol, defoaming agent, wetting dispersant, fumed silica, pearl powder, water, and pH adjuster, and dispersing them uniformly to obtain a first mixture; adding a curing agent to the first mixture, and dispersing them uniformly to obtain the pearlescent slurry.

[0040] Furthermore, the first mixture needs to be used after adding a curing agent within 6 months after the preparation is completed.

[0041] Furthermore, the pearlescent slurry needs to be used within 6-8 hours after preparation.

[0042] Furthermore, the waterborne polyurethane resin is an anionic polyether aliphatic polyurethane with a solid content of 45-55wt%.

[0043] Furthermore, the content of the waterborne polyurethane resin is 50-60%.

[0044] The optimization of polyurethane resin content ensures that the coating is firm and resistant to bending while ensuring that the coating is soft and elastic. If the polyurethane resin content is too low, the ink viscosity will be too low to be sizing. If the polyurethane resin content is too high, the ink viscosity will be too high, affecting the leveling effect of the slurry and causing uneven distribution of yarn thickness. In addition, if the polyurethane resin content is too high, it will be easy to have insufficient curing time, causing the yarns to stick to each other.

[0045] Furthermore, the pearl powder has a particle size of 40-150 um and a content of 5-8 wt%.

[0046] Furthermore, the curing agent is a water-dispersible isocyanate curing agent. Different types of curing agents may have compatibility issues with other components in the slurry, affecting the overall performance of the slurry.

[0047] Furthermore, the pH of the pearlescent slurry is 6-8, and the viscosity is 6000-30000 cps.

[0048] The pH value should be between 6 and 8 to keep the slurry neutral, so as to avoid the incompatibility and precipitation of added materials due to excessively high or low pH value, which would affect the stability of the slurry.

[0049] Furthermore, the impregnation time of the raw yarn is 0.1-1s, and the drying temperature is 120°C.

[0050] Furthermore, the impregnation of the raw yarn is carried out using a sizing machine.

[0051] The second aspect of the present application provides a pearlescent yarn, which is prepared by the preparation method described in the first aspect of the present application.

[0052] Furthermore, the thickness of the pearlescent coating is 100-500um.

[0053] Different from the existing technology, the pearlescent coating in the pearlescent yarn firmly wraps the yarn, the pearlescent powder will not fall off during the spinning process, and can significantly reduce the hairiness of the yarn and improve the spinnability of the yarn. The pearlescent coating gives the yarn a unique appearance and greatly improves the beauty of the yarn.

[0054] The third aspect of the present application provides a pearlescent fabric, which is woven using the pearlescent yarn described in the second aspect of the present application.

[0055] Different from the existing technology, pearlescent fabric is woven with pearlescent yarn, and has pearlescent effect on both sides; pearlescent yarn can also be blended with ordinary yarn, so the fabric has pearlescent effect and is also breathable.

[0056] In this embodiment, the waterborne polyurethane resin uses PU-8001Y anionic polyether aliphatic polyurethane dispersion from Hefei Huayue New Materials Technology Co., Ltd. The pH value adjuster uses: RHODOLINE AN-130 from Solvay, France; the defoamer uses Antifoam 2-89 from TEGO; the wetting and dispersing agent uses Clariant Dispersogen 3169; the silica uses CAB-O-SIL LM-150 hydrophilic fumed silica from Cabot; the pearlescent powder uses Xiamen Kuncai Pearlescent Pigment KC19819B Shining Purple-Blue Green; the curing agent uses the water-dispersible isocyanate curing agent H99 from Putian Dake New Materials Co., Ltd.

[0057] In this embodiment, the raw material yarn is 300D semi-gloss low-elastic DTY oiled yarn.

[0058] In this embodiment, a sizing machine (structure Figure 1 As shown) for raw yarn impregnation, the equipment and process flow are as follows Figure 1 As shown, the following steps are included:

[0059] ①Turn on the power switch, fan, dehumidification system, heating system, slurry tank heating, oven heating in sequence to preheat, and start the next step after the temperature stabilizes to the set temperature;

[0060] ②Put the yarn tube in place and pass the yarn end through the yarn guide porcelain seat (note that the axis of the yarn tube is vertically aligned with the yarn guide hole, otherwise the yarn is easy to break);

[0061] ③Then the yarn passes through the tension yarn guide, immersion roller, and microporous scraper in sequence (the appropriate scraping hole diameter is selected according to the yarn thickness and coating thickness);

[0062] ④ Tie the thread end to the screw of the drying room, and start pre-winding after tying it tightly. Wind the yarn onto the rotating cage, and the winding rotating cage will automatically wind 320 circles; find the thread end tied to the screw of the drying room, take it out, and wind it manually; install the bobbin, and the thread end passes through the tension pulley and the broken thread stop in turn, and then bind the yarn to the bobbin from bottom to top and hook the yarn into the horizontal yarn guide; test the yarn tension, adjust the yarn feeding rate, and keep the yarn in a straight and taut state;

[0063] ⑤ After the trial run goes smoothly and there is no frequent short line, pour the configured pearlescent slurry into the slurry tank, and the yarn speed is 30m / min; after the sizing is completed, the oven heating, slurry tank heating, heating system, dehumidification system, fan and power switch are turned off, and the yarn is taken out after the power is turned off, the slurry tank is taken out, the slurry inside is cleaned, the yarn on the rotating cage is taken out, and the residual yarn is cleaned; the yarn tube is removed to obtain the pearlescent yarn.

[0064] Example 1

[0065] 1. Mix 55 kg of waterborne polyurethane resin, 4 kg of ethylene glycol, 1.2 kg of defoamer, 3.5 kg of wetting dispersant, 3 kg of fumed silica, 7 kg of pearl powder, 0.5 kg of pH regulator, and 25.8 L of water, and disperse them uniformly to obtain a first mixture; add 2 kg of curing agent to the first mixture, and disperse them uniformly to obtain the pearlescent slurry.

[0066] 2. The raw yarn is impregnated with a sizing machine and then dried, with a yarn speed of 30 m / min, an impregnation time of 0.1-1 s, and drying at 120° C. A pearlescent coating is formed on the surface of the raw yarn to obtain the pearlescent yarn.

[0067] Example 2

[0068] 1. Mix 40 kg of waterborne polyurethane resin, 2 kg of ethylene glycol, 0.5 kg of defoamer, 2 kg of wetting dispersant, 1 kg of fumed silica, 3 kg of pearl powder, 0.1 kg of pH adjuster, and 51.4 L of water, and disperse them uniformly to obtain a first mixture; add 1 kg of curing agent to the first mixture, and disperse them uniformly to obtain the pearlescent slurry.

[0069] 2. The raw yarn is impregnated with a sizing machine and then dried, with a yarn speed of 30 m / min, an impregnation time of 0.1-1 s, and drying at 120° C. A pearlescent coating is formed on the surface of the raw yarn to obtain the pearlescent yarn.

[0070] Example 3

[0071] 1. Mix 70 kg of waterborne polyurethane resin, 6 kg of ethylene glycol, 1.8 kg of defoamer, 5 kg of wetting dispersant, 5 kg of fumed silica, 11 kg of pearl powder, 1 kg of pH adjuster, and 0.2 L of water, and disperse them uniformly to obtain a first mixture; add 3 kg of curing agent to the first mixture, and disperse them uniformly to obtain the pearlescent slurry.

[0072] 2. The raw yarn is impregnated with a sizing machine and then dried, with a yarn speed of 30 m / min, an impregnation time of 0.1-1 s, and drying at 120° C. A pearlescent coating is formed on the surface of the raw yarn to obtain the pearlescent yarn.

[0073] Comparative Example 1

[0074] 1. Mix 55 kg of waterborne polyurethane resin, 4 kg of ethylene glycol, 0.1 kg of defoamer, 3.5 kg of wetting dispersant, 3 kg of fumed silica, 7 kg of pearl powder, 0.5 kg of pH regulator, and 26.9 L of water, and disperse them uniformly to obtain a first mixture; add 2 kg of curing agent to the first mixture, and disperse them uniformly to obtain the pearlescent slurry.

[0075] 2. The raw yarn is impregnated with a sizing machine and then dried, with a yarn speed of 30 m / min, an impregnation time of 0.1-1 s, and drying at 120° C. A pearlescent coating is formed on the surface of the raw yarn to obtain the pearlescent yarn.

[0076] Comparative Example 2

[0077] 1. Mix 55 kg of waterborne polyurethane resin, 4 kg of ethylene glycol, 1.2 kg of defoamer, 8 kg of wetting dispersant, 3 kg of fumed silica, 7 kg of pearl powder, 0.5 kg of pH regulator, and 21.3 L of water, and disperse them uniformly to obtain a first mixture; add 2 kg of curing agent to the first mixture, and disperse them uniformly to obtain the pearlescent slurry.

[0078] 2. The raw yarn is impregnated with a sizing machine and then dried, with a yarn speed of 30 m / min, an impregnation time of 0.1-1 s, and drying at 120° C. A pearlescent coating is formed on the surface of the raw yarn to obtain the pearlescent yarn.

[0079] Comparative Example 3

[0080] 1. Mix 55 kg of waterborne polyurethane resin, 4 kg of ethylene glycol, 1.2 kg of defoaming agent, 1 kg of wetting dispersant, 3 kg of fumed silica, 7 kg of pearl powder, 0.5 kg of pH regulator, and 28.3 L of water, and disperse them uniformly to obtain a first mixture; add 0.5 kg of curing agent to the first mixture, and disperse them uniformly to obtain the pearlescent slurry.

[0081] 2. The raw yarn is impregnated with a sizing machine and then dried, the yarn speed is 30 m / min, the impregnation time is 0.1-1 s, and the raw yarn is dried at 120° C. A pearlescent coating is formed on the surface of the raw yarn to obtain the pearlescent yarn. Comparative Example 4:

[0082] 1. Mix 80 kg of waterborne polyurethane resin, 4 kg of ethylene glycol, 1.2 kg of defoamer, 3.5 kg of wetting dispersant, 3 kg of fumed silica, 7 kg of pearl powder, 0.5 kg of pH regulator, and 0.8 L of water, and disperse them uniformly to obtain a first mixture; add 1 kg of curing agent to the first mixture, and disperse them uniformly to obtain the pearlescent slurry.

[0083] 2. The raw yarn is impregnated with a sizing machine and then dried, the yarn speed is 30 m / min, the impregnation time is 0.1-1 s, and the raw yarn is dried at 120°C, a pearlescent coating is formed on the surface of the raw yarn to obtain the pearlescent yarn. Performance tests were conducted on Examples 1-3 and Comparative Examples 1-4, and the test results are shown in the following table:

[0084]

[0085] In this embodiment, the test method used is:

[0086] ① Yarn cross section and coating thickness: The yarn is wrapped in wool using the Haughey sectioning method, cut with a slicer and coated with collodion, then observed and measured under a Keyence optical microscope.

[0087] ② Breaking strength and elongation (measured according to the method specified in GB / T 3916-2013): measured using the YG023B-III fully automatic single yarn strength tester. Clamp the yarn; tensile test Press the start button on the control panel to perform the tensile test. After the yarn breaks, the instrument automatically records and displays the maximum strength value (peak strength value), tensile length, breaking time and test number at the time of the break. The average value is taken for multiple tests (note that if the break position of the sample is normal, the test is valid, otherwise re-sample and test).

[0088] ③ Hydrolysis machine GT-7005-R tests the high temperature and high humidity resistance of fabrics (tested according to the method specified in GB / T3903.7-2019): hang the material on the sample clamp without contact with the inside of the machine, set the temperature, humidity and test time required for the test, turn off the machine after the time is up, take out the material and dry it for 2 hours, and make a judgment according to the test standard.

[0089] ④ Use the leather flex tester GT-7071-B to test the flex resistance (test according to the method specified in IS017694:2016): fix the test sample on the upper and lower fixtures, turn on the power switch, set the test speed, and check the machine angle; reset the counter to zero, turn on the motor to test, observe the test status when a certain number of revolutions is reached during the test, and remove the test sample after the test to observe the results.

[0090] Embodiment 4 Weaving of a pearlescent fabric

[0091] An automatic rapier loom (SGA598, Tongyuan Textile Machinery Co., Ltd.) was used to weave the pearlescent yarn of Example 1 with the commercial yarn to produce a cloth with a size of 0.8×1.8 meters.

[0092] Example 5: Weaving of a pearlescent fabric

[0093] The pearlescent yarn in Example 2 was used to weave the pearlescent embroidery pattern on the surface of the cloth by a digital embroidery machine (NV180, Brother (China) Commercial Co., Ltd.).

[0094] Through the designed fabric pattern, pearlescent yarn can be used to weave various types of pearlescent fiber-based fabrics such as plain, twill, satin, double-layer and honeycomb, which can be double-sided or single-sided pearlescent. Pearlescent yarn can also be used to embroider on the fabric, so that the fabric presents a smart pearlescent pattern locally.

[0095] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A method for preparing pearlescent yarn, characterized in that: The raw yarn is impregnated with pearl slurry and then dried to form a pearl coating on the surface of the raw yarn to obtain the pearl yarn; the pearl slurry contains 40-70wt% of waterborne polyurethane resin, 0.1-1wt% of pH adjuster, 2-6wt% of ethylene glycol, 0.5-1.8wt% of defoamer, 2-5wt% of wetting dispersant, 1-5wt% of fumed silica, 3-11% of pearl powder, 1-3% of curing agent, and the balance is water.

2. The preparation method according to claim 1, characterized in that: The waterborne polyurethane resin is an anionic polyether aliphatic polyurethane with a solid content of 45-55%.

3. The preparation method according to claim 1, characterized in that: The content of the waterborne polyurethane resin is 50-60wt%.

4. The preparation method according to claim 1, characterized in that: The particle size of the pearlescent powder is 40-150 um, and the content is 5-8 wt%.

5. The preparation method according to claim 1, characterized in that: The curing agent is a water dispersible isocyanate curing agent.

6. The preparation method according to claim 1, characterized in that: The pH of the pearlescent slurry is 6-8, and the viscosity is 6000-30000 cps.

7. The preparation method according to claim 1, characterized in that: The impregnation time of the raw material yarn is 0.1-1s, and the drying temperature is 120°C.

8. A pearlescent yarn, characterized in that: The pearlescent yarn is prepared by the preparation method described in any one of claims 1 to 7.

9. The pearlescent yarn according to claim 8, characterized in that: The thickness of the pearlescent coating is 100-500um.

10. A pearlescent fabric, characterized in that: The pearlescent fabric is woven using the pearlescent yarn described in claim 8 or 9.

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