Fabric having metallic luster and method for manufacturing the same

Abstract

The application relates to the technical field of textile fabrics, and particularly discloses a fabric with metallic luster and a preparation method thereof. The fabric with metallic luster is woven by warp and weft, and is characterized in that the raw material of the weft comprises modified polyester fiber and superfine denier polyester fiber; the raw material of the warp comprises modified polyester fiber and modified cotton fiber; and the raw material of the modified polyester fiber comprises PET chips, metal oxide coated mica powder, phosphonic acid modified hydroxyl-terminated hyperbranched polyester, a polyether softening agent and a silane coupling agent. The fabric with metallic luster has uniform metallic luster, and meanwhile, the fabric has good softness, air permeability and wearing comfort.

Description

Technical Field

[0001] This application relates to the field of textile fabric technology, and more specifically, to a metallic luster fabric and a method for preparing the same. Background Technology

[0002] With the deep integration of textile technology and materials science, fabrics with metallic luster, due to their unique visual effects and functional characteristics, can meet consumers' requirements for personalized and differentiated aesthetic effects, and show broad application prospects in fashion apparel, industrial protection, smart home and other fields.

[0003] Traditional processes typically involve blending metal fibers such as stainless steel and aluminum with ordinary fibers such as cotton and polyester, or using surface coating processes. This involves coating the fabric surface with resin containing metal micropowders such as aluminum foil powder and copper powder, utilizing the high reflectivity of the metal fibers or metal micropowders to achieve a natural metallic luster effect on the fabric.

[0004] Regarding the aforementioned technologies, the inventors discovered that the addition of metal fibers often directly sacrifices the softness of the fabric, making it feel stiff. Furthermore, insufficient cohesion between metal fibers and ordinary fibers easily leads to uneven blending, resulting in uneven luster distribution. Coating the surface with a resin coating agent containing metal micropowder significantly reduces the fabric's breathability, severely impacting the wearing comfort of the fabric. Summary of the Invention

[0005] In order to improve the softness and breathability of metallic fabrics, and enhance the uniformity of the luster and wearing comfort of the fabrics, this application provides a metallic fabric and a method for preparing the same.

[0006] In a first aspect, this application provides a fabric with a metallic luster, employing the following technical solution:

[0007] A metallic luster fabric, woven from warp and weft yarns, is characterized in that the raw materials of the weft yarns include modified polyester fiber and microfiber polyester fiber; and the raw materials of the warp yarns include modified polyester fiber and modified cotton fiber.

[0008] The modified polyester fiber, by weight, comprises 70-80 parts PET chips, 3-5 parts metal oxide-coated mica powder, 8-12 parts phosphonic acid-modified hydroxyl-terminated hyperbranched polyester, 2-4 parts polyether softener, and 0.3-0.6 parts silane coupling agent.

[0009] By adopting the above technical solution, the inventors discovered that by using mica powder coated with metal oxide as a gloss filler, a stable chemical bond is formed through the chelating effect of phosphonic acid groups in the phosphonic acid-modified end-hydroxyl hyperbranched polyester. This bond acts as a bridge to form a stable connection between the inorganic gloss filler and the organic PET matrix, significantly enhancing the dispersion stability of the gloss filler in the PET matrix. This effectively reduces the problems of uneven fiber gloss and poor color durability caused by uneven metal fiber blending or phase separation leading to the peeling of the gloss filler coating in traditional processes. The silane coupling agent further improves the interfacial compatibility between the inorganic gloss raw material and the organic PET matrix, reducing the agglomeration problem of the inorganic filler. At the same time, it helps to reduce the peeling of the gloss filler caused by washing or friction, further improving the uniform metallic gloss effect of the modified polyester fiber.

[0010] This application uses polyethylene glycol and polypropylene glycol as polyether-based softeners, which have good compatibility with the modified PET matrix raw materials, do not cause fiber surface exudation problems, and will not volatilize or decompose during subsequent high-temperature processing. While ensuring the strength of the modified polyester fibers, it significantly reduces the impact of inorganic gloss fillers on the rigidity of the modified polyester fibers. Blending ultrafine denier polyester fibers or modified cotton fibers with the modified polyester fibers of this application as warp and weft yarns respectively, synergistically enhances the air permeability of the fabric and effectively reduces the impact of traditional coating processes on the air permeability of the fabric.

[0011] Optionally, the mass ratio of modified polyester fiber to ultrafine denier polyester fiber in the weft yarn is 1:(0.2-0.4); the mass ratio of modified polyester fiber to modified cotton fiber in the warp yarn is 1:(1.2-1.8).

[0012] By adopting the above technical solution, the proportion of modified polyester fiber in the weft is relatively high, which ensures the metallic luster of the fabric. A small amount of ultra-fine denier polyester fiber can enhance the softness and fineness of the fabric, and further fill the gaps between fibers, thereby improving the uniformity of luster reflection and avoiding a mottled appearance.

[0013] The proportion of modified polyester fiber in the warp yarns was reduced, while the content of modified cotton fiber was increased. The excellent breathability and softness of cotton fiber effectively improved the softness and breathability of the fabric. Furthermore, by controlling the content of modified polyester fiber in the weft and warp yarns, the amount of inorganic gloss filler added was controlled. The resulting fabric has a directional gloss feel, and the gloss is concentrated and uniform, giving the fabric a better aesthetic appeal.

[0014] Optionally, the softener is a polyether-based softener, selected from either polyethylene glycol or polypropylene glycol.

[0015] Optionally, the preparation method of the phosphonic acid-modified hydroxyl-terminated hyperbranched polyester includes the following steps:

[0016] Hydroxyl-terminated hyperbranched polyester is dissolved in an organic solvent, vinylphosphonic acid is added, and the mass of vinylphosphonic acid is 8-12 wt% of the hydroxyl-terminated hyperbranched polyester. 0.5-0.7 wt% alkaline catalyst is added dropwise, and the reaction is stirred at 50-60°C for 6-8 hours under an inert gas atmosphere. After cooling and neutralization, the organic solvent is removed by rotary evaporation, and the product is purified by precipitation with methanol and dried to obtain the final product.

[0017] Optionally, the alkaline catalyst is 1,8-diazabicyclo[5.4.0]undec-7-ene.

[0018] By adopting the above technical solution, under alkaline conditions, the hydroxyl-terminated hyperbranched polyester undergoes a Michael addition reaction with vinylphosphonic acid. The hydroxyl groups in the hydroxyl-terminated hyperbranched polyester undergo a nucleophilic reaction with the unsaturated double bonds in vinylphosphonic acid, introducing phosphonic acid groups and metal chelating sites into the hydroxyl-terminated hyperbranched polyester. At the same time, the hyperbranching degree of the hyperbranched polyester can be improved by physically wrapping the mica powder with metal oxide. Under the dual effects of chelation and wrapping, the uniform dispersion of inorganic gloss filler in PET matrix is ​​significantly improved, and the interfacial bonding force between inorganic gloss filler and PET matrix is ​​enhanced.

[0019] Furthermore, by embedding the three-dimensional structure of end-hydroxyl hyperbranched polyester into the PET molecular chain, the free volume is significantly expanded, the coefficient of friction between molecular chains is reduced, and the crystallinity of the PET molecular chain is weakened, making the modified polyester fiber more prone to deformation under stress and softer to the touch.

[0020] Optionally, the method for preparing the modified cotton fiber includes the following steps:

[0021] S1: Pretreated cotton fibers are obtained by plasma treatment of cotton fibers.

[0022] S2: The pretreated cotton fibers are added to a supercritical carbon dioxide fluid containing a compound enzyme at a volume ratio of 1:(9-12) for cold stacking. After depressurization to atmospheric pressure, the fibers are washed and dried to obtain enzyme-treated cotton fibers.

[0023] Optionally, in step S1, the plasma treatment is performed at a power of 80-100W for a processing time of 1-2 minutes, and the gas atmosphere is oxygen.

[0024] Optionally, the complex enzyme is selected from at least two combinations of cellulase, pectinase, protease and laccase.

[0025] Optionally, the conditions for cold-packing pretreated cotton fibers with supercritical carbon dioxide fluid are 50-60℃, fluid pressure 10-12MPa, duration 2-3h, and concentration of compound enzyme 4-6g / L.

[0026] By adopting the above technical solution, the plasma etching effect weakens the wax layer on the fiber surface, forming an uneven rough structure at the nanoscale, which increases the specific surface area of ​​the fiber, opens the fiber channels, and enhances the penetration efficiency of subsequent enzymes. Furthermore, through plasma treatment in an oxygen atmosphere, polar groups such as hydroxyl and carboxyl groups are introduced into the cotton fiber, which further enhances the moisture absorption of the fabric, allowing the fabric to maintain the porosity between fibers after absorbing moisture, thus enhancing the comfort of the fabric.

[0027] The method of pretreating fibers by using supercritical fluid to carry composite enzymes significantly improves enzyme permeability. The composite enzyme treatment acts as a pore-forming agent, penetrating deep into the fiber interior to form nanoscale pores. Based on plasma treatment, a multi-level pore structure is further constructed, enhancing the fiber's gas permeability.

[0028] Secondly, this application provides a method for preparing a fabric with a metallic luster, employing the following technical solution:

[0029] A method for preparing a woven fabric with a metallic luster includes the following steps:

[0030] Modified polyester fiber is obtained by melt spinning the various raw materials of modified polyester fiber according to the specified ratio.

[0031] Modified polyester fiber is blended with ultra-fine denier polyester fiber to obtain weft yarn, and modified polyester fiber is blended with modified cotton fiber to obtain warp yarn.

[0032] The weft and warp yarns are woven using a rapier loom to obtain the final product.

[0033] By adopting the above technical solution, modified polyester fibers are prepared by melt spinning and then combined with ultra-fine denier polyester fibers and modified cotton fibers to prepare weft and warp yarns, respectively. The fabric is then woven using a rapier loom. The resulting fabric has uniform and orderly interlacing of warp yarns, uniform distribution of metallic luster, and excellent chemical properties.

[0034] In summary, this application has the following beneficial effects:

[0035] 1. Because this application uses a melt blending spinning process to introduce metal oxide-coated mica powder as a luster raw material into polyester fiber to prepare modified polyester fiber, and uses a high proportion of modified polyester fiber to blend with ultrafine denier polyester fiber to prepare weft yarn, and a lower proportion of modified polyester fiber to blend with modified cotton fiber to prepare warp yarn, the problem of reduced fabric softness and breathability caused by the addition of inorganic luster filler is significantly reduced. At the same time, the uniformity of fabric luster reflection is improved, preventing the appearance of mottled appearance. The fabric has a uniform metallic luster, giving the fabric a better aesthetic effect.

[0036] 2. In this application, phosphonic acid groups are introduced into the hydroxyl-terminated hyperbranched polyester, and metal chelating sites are introduced into the modified polyester fiber. At the same time, the hyperbranching degree of the hyperbranched polyester is improved by physically winding the metal oxide to coat the mica powder. Under the dual effects of chelation and winding, the uniformity of inorganic gloss filler in the PET matrix and its compatibility with the PET matrix are significantly improved, ensuring the uniformity of the metallic gloss of the fabric.

[0037] 3. This application prepares modified cotton fibers by combining plasma treatment and supercritical fluid-carried complex enzyme hydrolysis. The plasma first opens the cotton fiber channels, enhancing the penetration efficiency of the subsequent enzyme agent. A small amount of enzyme agent can construct a multi-level pore structure in the cotton fiber, significantly enhancing the gas permeability of the fiber. Detailed Implementation

[0038] The present application will be further described in detail below with reference to embodiments and comparative examples.

[0039] raw material

[0040] Unless otherwise specified, all raw materials used in the embodiments and comparative examples in this application are commercially available products, specifically:

[0041] Ultra-fine denier polyester fiber, with a single filament fineness of 0.5-1 dtex;

[0042] PET chips, polyethylene terephthalate, CAS: 25038-59-9;

[0043] The polyethylene glycol is PEG-600;

[0044] The polypropylene glycol is PPG-400;

[0045] Metal oxide-coated mica powder, specifically titanium dioxide-coated mica powder, with a titanium dioxide coating rate of (35±2)% and a mesh size of 1200 mesh;

[0046] Hydroxyl-terminated hyperbranched polyester, selected from Wuhan Hyperbranched Resin Technology Co., Ltd., H201;

[0047] Cellulase, selected from Ningxia Heshibi Biotechnology Co., Ltd., HSB-16;

[0048] Pectinase, selected from Ningxia Heshibi Biotechnology Co., Ltd., hsb02-10w;

[0049] Laccase, selected from Ningbo Jingshun Biotechnology Co., Ltd., 18-2;

[0050] Fatty alcohol polyoxyethylene ether, selected from Henan Qida Chemical Raw Materials Co., Ltd., AEO-9.

[0051] Examples of preparation of phosphonic acid-modified hydroxyl-terminated hyperbranched polyesters: 1.1-1.4

[0052] Preparation Example 1.1

[0053] A method for preparing phosphonic acid-modified hydroxyl-terminated hyperbranched polyester includes the following steps:

[0054] S1: Nitrogen gas was purged into a dry 100mL three-necked flask for 20min to remove oxygen. 5g of terminal hydroxyl hyperbranched polyester and 30mL of N,N-dimethylformamide were added and stirred until completely dissolved. Then, 0.4g of vinylphosphonic acid was slowly added, and 0.025g of 1,8-diazabicyclo[5.4.0]undec-7-ene was added dropwise. The reaction was stirred at 60℃ for 8h to obtain the reaction solution. The pH of the system during the reaction was 8±0.5.

[0055] S2: After cooling the reaction solution obtained in step S1, add 0.5 mol / L hydrochloric acid dropwise to neutralize to pH 7. After removing the solvent by rotary evaporation, slowly add the product to 200 mL of cold methanol. After repeated precipitation 3 times, vacuum dry at 60 °C for 15 h to obtain the final product.

[0056] Preparation Example 1.2

[0057] A method for preparing phosphonic acid-modified hydroxyl-terminated hyperbranched polyester includes the following steps:

[0058] S1: Nitrogen gas was purged into a dry 100mL three-necked flask for 20min to remove oxygen. 5g of terminal hydroxyl hyperbranched polyester and 30mL of N,N-dimethylformamide were added and stirred until completely dissolved. Then, 0.5g of vinylphosphonic acid was slowly added, and 0.03g of 1,8-diazabicyclo[5.4.0]undec-7-ene was added dropwise. The reaction was stirred at 70℃ for 7h to obtain the reaction solution. The pH of the system during the reaction was 8±0.5.

[0059] S2: After cooling the reaction solution obtained in step S1, add 0.5 mol / L hydrochloric acid dropwise to neutralize to pH 7. After removing the solvent by rotary evaporation, slowly add the product to 200 mL of cold methanol. After repeated precipitation 3 times, vacuum dry at 60 °C for 15 h to obtain the final product.

[0060] Preparation Example 1.3

[0061] A method for preparing phosphonic acid-modified hydroxyl-terminated hyperbranched polyester includes the following steps:

[0062] S1: Nitrogen gas was purged into a dry 100mL three-necked flask for 20min to remove oxygen. 5g of terminal hydroxyl hyperbranched polyester and 30mL of N,N-dimethylformamide were added and stirred until completely dissolved. Then, 0.5g of vinylphosphonic acid was slowly added, and 0.035g of 1,8-diazabicyclo[5.4.0]undec-7-ene was added dropwise. The reaction was stirred at 60℃ for 8h to obtain the reaction solution. The pH of the system during the reaction was 8±0.5.

[0063] S2: After cooling the reaction solution obtained in step S1, add 0.5 mol / L hydrochloric acid dropwise to neutralize to pH 7. After removing the solvent by rotary evaporation, slowly add the product to 200 mL of cold methanol. After repeated precipitation 3 times, vacuum dry at 60 °C for 15 h to obtain the final product.

[0064] Preparation Example 1.4

[0065] A method for preparing phosphonic acid-modified hydroxyl-terminated hyperbranched polyester includes the following steps:

[0066] S1: Nitrogen gas was purged into a dry 100mL three-necked flask for 20min to remove oxygen. 5g of terminal hydroxyl hyperbranched polyester and 30mL of N,N-dimethylformamide were added and stirred until completely dissolved. Then, 0.6g of vinylphosphonic acid was slowly added, and 0.035g of 1,8-diazabicyclo[5.4.0]undec-7-ene was added dropwise. The reaction was stirred at 80℃ for 8h to obtain the reaction solution. The pH of the system during the reaction was 8±0.5.

[0067] S2: After cooling the reaction solution obtained in step S1, add 0.5 mol / L hydrochloric acid dropwise to neutralize to pH 7. After removing the solvent by rotary evaporation, slowly add the product to 200 mL of cold methanol. After repeated precipitation 3 times, vacuum dry at 60 °C for 15 h to obtain the final product.

[0068] Examples of modified cotton fiber preparation 2.1-2.6

[0069] Preparation Example 2.1

[0070] The method for preparing modified cotton fibers includes the following steps:

[0071] S1: Pretreated cotton fibers are obtained by plasma treatment at 80W for 2 minutes in an oxygen atmosphere.

[0072] S2: Pretreated cotton fibers are added to supercritical carbon dioxide fluid at a volume ratio of 1:10 for cold stacking. The cold stacking conditions are 50℃, fluid pressure 12MPa, and duration 3h. The supercritical carbon dioxide fluid contains 5g / L of compound enzyme and 2g / L of surfactant. The compound enzyme includes cellulase, pectinase, and laccase in a mass ratio of 1:0.8:1.25. The surfactant is fatty alcohol polyoxyethylene ether. After depressurization to atmospheric pressure, the fibers are washed with water and dried to obtain enzyme-treated cotton fibers.

[0073] Preparation Example 2.2

[0074] The method for preparing modified cotton fibers includes the following steps:

[0075] S1: Pretreated cotton fibers are obtained by plasma treatment at 100W for 1 minute in an oxygen atmosphere.

[0076] S2: Pretreated cotton fibers are added to supercritical carbon dioxide fluid at a volume ratio of 1:12 for cold stacking. The cold stacking conditions are 60℃, fluid pressure 10MPa, and duration 2h. The supercritical carbon dioxide fluid contains 5g / L of compound enzyme and 2g / L of surfactant. The compound enzyme includes cellulase, pectinase, and laccase in a mass ratio of 1:0.8:1.25. The surfactant is fatty alcohol polyoxyethylene ether. After depressurization to atmospheric pressure, the fibers are washed with water and dried to obtain enzyme-treated cotton fibers.

[0077] Preparation Example 2.3

[0078] The method for preparing modified cotton fibers includes the following steps:

[0079] S1: Cotton fibers are subjected to plasma treatment at 80W for 1.5 minutes in an oxygen atmosphere to obtain pretreated cotton fibers;

[0080] S2: Pretreated cotton fibers are added to supercritical carbon dioxide fluid at a volume ratio of 1:9 for cold stacking. The cold stacking conditions are 50℃, fluid pressure 11MPa, and duration 2.5h. The supercritical carbon dioxide fluid contains 4g / L of a compound enzyme and 2g / L of a surfactant. The compound enzyme includes cellulase, pectinase, and laccase in a mass ratio of 1:0.8:1.25. The surfactant is fatty alcohol polyoxyethylene ether. After depressurization to atmospheric pressure, the fibers are washed with water and dried to obtain enzyme-treated cotton fibers.

[0081] Preparation Example 2.4

[0082] The method for preparing modified cotton fibers includes the following steps:

[0083] S1: Cotton fibers are subjected to plasma treatment at 100W in an oxygen atmosphere for 1.5 minutes to obtain pretreated cotton fibers;

[0084] S2: Pretreated cotton fibers are added to supercritical carbon dioxide fluid at a volume ratio of 1:10 for cold stacking. The cold stacking conditions are 60℃, fluid pressure 11MPa, and duration 3h. The supercritical carbon dioxide fluid contains 6g / L of a compound enzyme and 2g / L of a surfactant. The compound enzyme includes cellulase, pectinase, and laccase in a mass ratio of 1:0.8:1.25. The surfactant is fatty alcohol polyoxyethylene ether. After depressurization to atmospheric pressure, the fibers are washed with water and dried to obtain enzyme-treated cotton fibers.

[0085] Preparation Example 2.5

[0086] The method for preparing modified cotton fibers differs from that in Preparation Example 2.1 in that the plasma treatment in step S1 is not performed. Specifically, the method includes the following steps:

[0087] Cotton fibers were added to supercritical carbon dioxide fluid at a volume ratio of 1:10 for cold stacking. The cold stacking conditions were 50°C, fluid pressure 12 MPa, and duration 3 hours. The supercritical carbon dioxide fluid contained 5 g / L of a compound enzyme and 2 g / L of a surfactant. The compound enzyme included cellulase, pectinase, and laccase in a mass ratio of 1:0.8:1.25, and the surfactant was fatty alcohol polyoxyethylene ether. After depressurization to atmospheric pressure, the fibers were washed with water and dried to obtain enzyme-treated cotton fibers.

[0088] Preparation Example 2.6

[0089] The method for preparing modified cotton fiber differs from that in Preparation Example 2.1 in that the complex enzyme treatment in step S2 is not performed. Specifically, the method includes the following steps: the cotton fiber is subjected to plasma treatment at 80W in an oxygen atmosphere for 2 minutes to obtain modified cotton fiber.

[0090] Example

[0091] Example 1

[0092] A metallic luster fabric is woven from warp and weft yarns. The raw materials of the weft yarns include modified polyester fibers and ultrafine denier polyester fibers, and the raw materials of the warp yarns include modified polyester fibers and modified cotton fibers prepared in Preparation Example 2.1. The raw materials and amounts of the modified polyester fibers are shown in Table 1. The phosphonic acid modified hydroxyl-terminated hyperbranched polyester is prepared in Preparation Example 1.1. The softener is polyethylene glycol, the silane coupling agent is KH-550, the antioxidant is antioxidant 1010, and the lubricant is pentaerythritol stearate.

[0093] Table 1

[0094]

[0095] The method for preparing the above-mentioned metallic luster fabric includes the following steps:

[0096] S1: PET chips, titanium dioxide-coated mica powder, phosphonic acid-modified hydroxyl-terminated hyperbranched polyester, softener and antioxidant are blended in proportion and melt-spun at 265°C to obtain modified polyester fiber.

[0097] S2: Modified polyester fiber and ultra-fine denier polyester fiber are blended at a mass ratio of 1:0.2 to obtain weft yarn, and modified polyester fiber and modified cotton fiber are blended at a mass ratio of 1:1.8 to obtain warp yarn;

[0098] S3: The obtained weft and warp yarns are woven on a rapier loom with a tension of 16N and a speed of 280r / min. The fabric weight is 220g / m². 2 .

[0099] Example 2

[0100] A metallic-luster fabric differs from Example 1 in that the raw materials and amounts of modified polyester fibers are shown in Table 1. The preparation method of the above-mentioned metallic-luster fabric includes the following steps:

[0101] S1: PET chips, titanium dioxide-coated mica powder, phosphonic acid-modified hydroxyl-terminated hyperbranched polyester, softener and antioxidant are blended in proportion and melt-spun at 260°C to obtain modified polyester fiber.

[0102] S2: Modified polyester fiber and ultra-fine denier polyester fiber are blended at a mass ratio of 1:0.3 to obtain weft yarn, and modified polyester fiber and modified cotton fiber are blended at a mass ratio of 1:1.5 to obtain warp yarn;

[0103] S3: The obtained weft and warp yarns are woven on a rapier loom with a tension of 16N and a speed of 280r / min. The fabric weight is 240g / m². 2 .

[0104] Example 3

[0105] A metallic-luster fabric differs from Example 1 in that the raw materials and amounts of modified polyester fibers are shown in Table 1. The preparation method of the above-mentioned metallic-luster fabric includes the following steps:

[0106] S1: PET chips, titanium dioxide-coated mica powder, phosphonic acid-modified hydroxyl-terminated hyperbranched polyester, softener and antioxidant are blended in proportion and melt-spun at 270°C to obtain modified polyester fiber.

[0107] S2: Modified polyester fiber and ultra-fine denier polyester fiber are blended at a mass ratio of 1:0.4 to obtain weft yarn, and modified polyester fiber and modified cotton fiber are blended at a mass ratio of 1:1.2 to obtain warp yarn;

[0108] S3: The obtained weft and warp yarns are woven on a rapier loom with a tension of 16N and a speed of 280r / min. The fabric weight is 260g / m². 2 .

[0109] Example 4

[0110] A metallic-luster fabric differs from Example 1 in that the raw materials and amounts of modified polyester fibers are shown in Table 1. The preparation method of the above-mentioned metallic-luster fabric includes the following steps:

[0111] S1: PET chips, titanium dioxide-coated mica powder, phosphonic acid-modified hydroxyl-terminated hyperbranched polyester, softener and antioxidant are blended in proportion and melt-spun at 270°C to obtain modified polyester fiber.

[0112] S2: Modified polyester fiber and ultra-fine denier polyester fiber are blended at a mass ratio of 1:0.3 to obtain weft yarn, and modified polyester fiber and modified cotton fiber are blended at a mass ratio of 1:1.4 to obtain warp yarn;

[0113] S3: The obtained weft and warp yarns are woven on a rapier loom with a tension of 16N, a speed of 280r / min, and a fabric weight of 200g / m². 2 .

[0114] Example 5

[0115] A metallic luster fabric differs from Example 1 in that the phosphonic acid-modified terminal hydroxyl hyperbranched polyester in the modified polyester fiber is prepared by Preparation Example 1.2, the modified cotton fiber is prepared by Preparation Example 2.2, the softener is polypropylene glycol, and all other steps are the same as in Example 1.

[0116] Example 6

[0117] A metallic luster fabric differs from Example 1 in that the phosphonic acid-modified terminal hydroxyl hyperbranched polyester in the modified polyester fiber is prepared by Preparation Example 1.3, the modified cotton fiber is prepared by Preparation Example 2.3, the softener is polypropylene glycol, and all other steps are the same as in Example 1.

[0118] Example 7

[0119] A metallic luster fabric differs from Example 1 in that the phosphonic acid-modified terminal hydroxyl hyperbranched polyester in the modified polyester fiber is prepared by Preparation Example 1.4, and the modified cotton fiber is prepared by Preparation Example 2.4. All other steps are the same as in Example 1.

[0120] Example 8

[0121] A metallic luster fabric differs from Example 1 in that the modified cotton fiber is prepared using Preparation Example 2.5, while all other steps are the same as in Example 1.

[0122] Example 9

[0123] A metallic luster fabric differs from Example 1 in that the modified cotton fiber is prepared using Preparation Example 2.6, while all other steps are the same as in Example 1.

[0124] Comparative Example

[0125] Comparative Example 1

[0126] A metallic luster fabric differs from Example 1 in that the modified polyester fiber does not contain phosphonic acid-modified terminal hydroxyl hyperbranched polyester, while all other steps are the same as in Example 1.

[0127] Comparative Example 2

[0128] A metallic luster fabric differs from Example 1 in that the phosphonic acid-modified hydroxyl-terminated hyperbranched polyester in the modified polyester fiber raw material is replaced with an equal mass of unmodified hydroxyl-terminated hyperbranched polyester, while all other steps are the same as in Example 1.

[0129] Comparative Example 3

[0130] A metallic luster fabric differs from Example 1 in that no softener is added to the modified polyester fiber, while all other steps are the same as in Example 1.

[0131] Comparative Example 4

[0132] A metallic luster fabric differs from Example 1 in that the modified cotton fibers are replaced with an equal mass of unmodified cotton fibers blended with modified polyester fibers to prepare warp yarns; all other steps are the same as in Example 1.

[0133] Comparative Example 5

[0134] A metallic luster fabric differs from Example 1 in that modified cotton fibers are not added, and the modified cotton fibers in the warp yarn raw material are replaced with an equal mass of modified polyester fibers. All other steps are the same as in Example 1.

[0135] Performance testing

[0136] The following performance tests were conducted on the metallic luster fabrics obtained in Examples 1-9 and Comparative Examples 1-5, and the test results are recorded in Table 2.

[0137] 1. Observe the appearance of the fabric, whether there are obvious metallic bands, and whether there are appearance defects such as localized concentration of metallic luster or uneven luster.

[0138] 2. Air permeability: Referring to the relevant provisions of the pressure difference method in GB / T5453-1997, under the specified pressure difference conditions, the airflow rate passing vertically through a given area of ​​the sample within a certain time is measured, and the air permeability of the fabric is calculated. Each test is conducted 3 times, and the average value of the 3 test results is taken as the final result and the final result is recorded in Table 2.

[0139] 3. Moisture permeability: The moisture permeability of the fabric was determined according to the relevant provisions of the moisture permeation cup method in GB / T12704-1991. Each test was conducted 3 times, and the average value of the 3 test results was taken as the final result. The final result was recorded in Table 2.

[0140] 4. Softness: The softness of the fabric was tested in accordance with the relevant provisions of GB / T 8942-2016. The lower the softness value, the softer the fabric. Each test was conducted 3 times, and the average value of the 3 test results was taken as the final result. The final result was recorded in Table 2.

[0141] Table 2

[0142]

[0143] As can be seen from the performance test results of Examples 1-7 in Table 2, the fabric prepared by weaving using a blend of modified polyester fiber and ultra-fine denier polyester fiber as the weft yarn and a blend of modified polyester fiber and modified cotton fiber as the warp yarn exhibits a distinct and uniform metallic luster. This metallic luster displays a sense of layering and possesses excellent aesthetic effects. Compared to traditional processes, the metallic luster fabric of this application significantly improves the softness and breathability of the fabric, enhancing its luster while ensuring excellent breathability, moisture wicking, and softness, resulting in greater comfort.

[0144] The performance test results of Example 1 and Comparative Examples 1-2 show that the addition of phosphonic acid-modified hydroxyl-terminated hyperbranched polyester makes the distribution of inorganic gloss filler in the PET matrix more uniform, significantly improving the uniformity of metallic gloss in the fabric with added inorganic gloss filler. This is because the introduction of phosphonic acid groups into the hydroxyl-terminated hyperbranched polyester introduces metal chelating sites. Simultaneously, the hyperbranching degree of the hyperbranched polyester can be enhanced by physically winding titanium dioxide to coat mica powder, significantly improving the uniform dispersion of inorganic gloss filler in the PET matrix under the dual effects of chelation and winding, while also strengthening the interfacial bonding force between the inorganic gloss filler and the PET matrix. Furthermore, the three-dimensional structure of the hydroxyl-terminated hyperbranched polyester embedded in the PET molecular chain can significantly expand the free volume, reduce the coefficient of friction between molecular chains, and weaken the crystallinity of the PET molecular chain, making the modified polyester fiber more easily deformed under stress and resulting in a softer feel.

[0145] Although hydroxyl-terminated hyperbranched polyester was added in Comparative Example 2, phosphonic acid groups were not introduced. In this case, the dispersion effect on inorganic gloss fillers was not obvious, and the phenomenon of metal filler agglomeration was prone to occur, resulting in uneven metallic gloss, a mottled appearance, poor aesthetic effect, and a decrease in softness.

[0146] In Comparative Example 3, no softener was added to the modified polyester fiber, resulting in a decrease in softness. This indicates that the application uses polyethylene glycol and polypropylene glycol as polyether-based softeners, which have good compatibility with the modified PET matrix raw materials. Flexible long chains are introduced into the modified polyester fiber, further reducing the impact of inorganic gloss fillers on the rigidity of the modified polyester fiber while ensuring its performance.

[0147] Based on the performance test results of Example 1 and Comparative Examples 4-5, it can be seen that the modified cotton fiber prepared by this application through a combination of plasma treatment and supercritical fluid-carried complex enzyme hydrolysis has better air permeability and moisture wicking properties compared with unmodified cotton fiber. It can significantly improve the influence of inorganic luster filler on the softness of the fabric, and at the same time significantly improve the air permeability and moisture wicking properties of the fabric. This is because the plasma first opens the cotton fiber channel, enhances the penetration efficiency of the subsequent enzyme agent, and a small amount of enzyme agent can construct a multi-level pore structure in the cotton fiber, which significantly enhances the gas permeability of the fiber.

[0148] In Comparative Example 5, without the addition of modified cotton fiber, not only were the breathability, moisture wicking, and softness adversely affected, but the fabric, with only modified polyester fiber as the main component, lacked obvious luster and layering characteristics, resulting in a significant decrease in aesthetic appeal.

[0149] In Example 8, the cotton fibers were not pretreated with plasma in an oxygen atmosphere. As can be seen, the breathability and moisture-wicking performance of the final fabric was significantly reduced. This is because plasma treatment in an oxygen atmosphere can introduce polar groups such as hydroxyl and carboxyl groups into the cotton fibers, enhancing the fabric's hygroscopicity and its ability to maintain inter-fiber pores after moisture absorption, thereby improving the fabric's breathability and moisture-wicking performance. On the other hand, after plasma pretreatment, the etching effect of plasma treatment weakens the waxy layer on the fiber surface, forming an uneven and rough structure at the nanoscale, which increases the specific surface area of ​​the fiber, opens the fiber channels, enhances the penetration efficiency of subsequent enzymes, and enhances the penetration of complex enzymes into the fiber interior during subsequent enzymatic hydrolysis, forming nanoscale pores inside the fiber. Based on plasma treatment, a multi-level pore structure is further constructed, enhancing the breathability of the fabric prepared from the modified cotton fibers.

[0150] In Example 9, only the cotton fibers were subjected to plasma treatment in an oxygen atmosphere. The enzymatic hydrolysis of the compound enzyme was not carried out in supercritical carbon dioxide fluid. The enzymatic hydrolysis of the compound enzyme acted as a pore-forming agent. Although plasma treatment can enhance the surface roughness of cotton fibers, it cannot build a multi-level pore structure inside the cotton fibers. Therefore, the breathability and moisture-wicking performance of the fabric is significantly reduced.

[0151] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A metallic-luster fabric, woven from warp and weft threads, characterized in that, The raw materials for the weft yarns include modified polyester fibers and ultra-fine denier polyester fibers; the raw materials for the warp yarns include modified polyester fibers and modified cotton fibers. The modified polyester fiber, by weight, comprises 70-80 parts PET chips, 3-5 parts metal oxide-coated mica powder, 8-12 parts phosphonic acid-modified hydroxyl-terminated hyperbranched polyester, 2-4 parts softener, and 0.3-0.6 parts silane coupling agent. The preparation method of the phosphonic acid-modified hydroxyl-terminated hyperbranched polyester includes the following steps: Hydroxyl-terminated hyperbranched polyester is dissolved in an organic solvent, vinylphosphonic acid is added (the mass of vinylphosphonic acid is 8-12 wt% of the hydroxyl-terminated hyperbranched polyester), and 0.5-0.7 wt% alkaline catalyst is added dropwise. The reaction is carried out under an inert gas atmosphere at 50-60°C for 6-8 hours with stirring. After cooling, the mixture is neutralized, the organic solvent is removed by rotary evaporation, and the product is purified by precipitation with methanol and dried to obtain the final product.

2. The metallic luster fabric according to claim 1, characterized in that, The mass ratio of modified polyester fiber to ultrafine denier polyester fiber in the weft yarn is 1:(0.2-0.4); the mass ratio of modified polyester fiber to modified cotton fiber in the warp yarn is 1:(1.2-1.8).

3. The metallic luster fabric according to claim 1, characterized in that, The softener is a polyether-based softener, selected from either polyethylene glycol or polypropylene glycol.

4. The metallic luster fabric according to claim 1, characterized in that, The alkaline catalyst is 1,8-diazabicyclo[5.4.0]undec-7-ene.

5. The metallic luster fabric according to claim 1, characterized in that, The method for preparing the modified cotton fiber includes the following steps: S1: Pretreated cotton fibers are obtained by plasma treatment of cotton fibers. S2: The pretreated cotton fibers are added to a supercritical carbon dioxide fluid containing a compound enzyme at a volume ratio of 1:(9-12) for cold stacking. After depressurization to atmospheric pressure, the fibers are washed and dried to obtain enzyme-treated cotton fibers.

6. The metallic luster fabric according to claim 5, characterized in that, The conditions for cold-packing pretreated cotton fibers with supercritical carbon dioxide fluid are 50-60℃, fluid pressure 10-12MPa, duration 2-3h, and concentration of compound enzyme 4-6g / L.

7. A method for preparing a metallic luster fabric according to any one of claims 1-6, characterized in that, Includes the following steps: Modified polyester fiber is obtained by melt spinning the various raw materials of modified polyester fiber according to the specified ratio. Modified polyester fiber is blended with ultra-fine denier polyester fiber to obtain weft yarn, and modified polyester fiber is blended with modified cotton fiber to obtain warp yarn. The weft and warp yarns are woven using a rapier loom to obtain the final product.

Images