Preparation method of colored fiber and camouflage fabric with temperature rising function

Abstract

The application provides a preparation method of colored fiber and camouflage fabric with a temperature rising function. m W n O3 nanoparticles are used as photo-thermal particles, an acrylate polymer is used as a wall material, the photo-thermal particles are used as core materials, the photo-thermal particles coated with the acrylate polymer are prepared, then the photo-thermal particles coated with the acrylate polymer are used as temperature rising particles, inorganic pigments are used as coloring particles, a high molecular polymer is used as a fiber forming polymer, and colored fiber with a temperature rising function is prepared by using a melt spinning method; the colored fiber is woven by using plain weave, twill weave, satin weave or double-layer weave structure to prepare a camouflage fabric with a temperature rising function. The camouflage fabric prepared by the application has the functions of temperature rising and camouflage, the temperature can be raised by 10-18 DEG C, and the prepared fabric has strong breaking strength, good hand feeling and air permeability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fiber manufacturing, and particularly relates to a preparation method of colored fiber and camouflage fabric with a heating function. BACKGROUND

[0002] The existing thermal regulation textile is generally obtained through a coating method, only has the heat preservation function but does not have the heating function, and has poor air permeability and a hard hand feeling, which affects the wearing performance of the fabric. In addition, the heat preservation performance is obviously deteriorated under long-term external ultraviolet irradiation.

[0003] Nano transparent thermal insulation coating is a new variety in the functional coating market. It is essentially a kind of coating in which nano particles with infrared light absorption capacity are used as functional fillers of textile. The coating can be conveniently formed into a transparent thermal insulation film on the surface of the fabric in the form of scraping, spraying or spinning. The nano transparent thermal insulation coating has the advantages of simple preparation, good thermal insulation performance and convenient use, and therefore has great application value in the fields of building energy saving and clothing cooling.

[0004] At present, the nano particles used for preparing the transparent thermal insulation coating mainly include indium tin oxide (ITO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), noble metal and rare earth hexaboride compounds. However, these nano particles all have respective defects. The noble metal nano particles are not only expensive, but also have low visible light transmittance; the semiconductor ITO and the rare earth hexaboride compound nano particles only have blocking effect on infrared light in a specific wavelength range, and cannot achieve blocking in the whole near-infrared wavelength range.

[0005] Tungsten bronze (CsxWO3, CWO) is a potential near-infrared light absorption material, which is not only low in cost, but also can block the energy in the whole near-infrared wavelength range. When the tungsten bronze is applied to textile fabric by scraping, spraying or spinning, the tungsten bronze particles cannot be fixed due to the lack of affinity with the fabric substrate, and therefore an additional adhesive needs to be added to form a film and fix the tungsten bronze on the surface of the fabric. However, the addition of the adhesive for film formation leads to a sharp decrease in the air permeability of the fabric and a poor hand feeling, and the near-infrared absorption performance of the tungsten bronze is obviously deteriorated under long-term irradiation of external ultraviolet light. SUMMARY

[0006] The application aims to provide a preparation method of colored fiber and camouflage fabric with a heating function, which ensures that the material has high light absorption and heating performance, and has good air permeability and hand feeling.

[0007] The technical solution for achieving the application is as follows:

[0008] The application discloses a preparation method of colored fiber and camouflage fabric with a temperature rising function. Cesium tungsten bronze nanoparticles are selected as photo-thermal particles. The high absorption of the nanoparticles in the ultraviolet and near-infrared wave bands ensures that the material has high light absorption and temperature rising performance. The material has high transmittance in the visible light and displays a light blue color, thereby reducing the influence of the coloring performance on the material. In order to improve the stability of the photo-thermal particles in the field environment, the photo-thermal particles are coated with an acrylate polymer. In addition, the photo-thermal particles coated with the acrylate polymer are used as temperature rising particles, inorganic pigments are used as coloring particles, and a high molecular polymer is used as a fiber forming polymer. The colored fiber with the temperature rising function is prepared by using a melt spinning method.

[0009] Further, the preparation method of the colored fiber and the camouflage fabric with the temperature rising function specifically comprises the following steps.

[0010] (1) Preparation of photo-thermal particle dispersion:

[0011] The photo-thermal particles are dispersed in a certain amount of 20% concentration of a dispersant aqueous solution, and are transferred to a grinding machine. The photo-thermal particle dispersion is prepared by grinding under certain rotation speed conditions for a certain time.

[0012] (2) Preparation of polymer-coated photo-thermal particle powder:

[0013] A certain amount of photo-thermal particle dispersion is weighed, heated to a certain temperature after nitrogen is introduced, and the initiator, soft monomer and hard monomer are added while stirring. The polymer-coated photo-thermal particle powder is obtained by keeping the temperature for a certain time and then using a spray drying method.

[0014] (3) Preparation of photo-thermal particle / pigment blending master batch:

[0015] The fiber base polymer master batch, the polymer-coated photo-thermal particle powder, the ultraviolet absorber and the pigment are melt blended and extruded and granulated to prepare the photo-thermal particle / pigment blending master batch.

[0016] (4) Preparation of colored fiber with temperature rising function:

[0017] The fiber base polymer master batch and the photo-thermal particle / pigment blending master batch are blended and a colored fiber with temperature rising function is obtained through a spinning process.

[0018] Preferably, in step (1), the photo-thermal particles are cesium-doped tungsten bronze (Cs m W n O3), wherein m / n = (0.15-0.52):1.

[0019] Preferably, in step (1), the dispersant is DM-1501, AD-4600, 85A or MF.

[0020] Preferably, in step (1), the mass ratio of the photothermal particles: dispersant aqueous solution is 1:(5-10).

[0021] Preferably, in step (1), the grinding speed is 3000-6000 r / min, and the grinding time is 8-15 h.

[0022] Preferably, in step (2), the initiator is azobisdimethylamidine hydrochloride.

[0023] Preferably, in step (2), the hard monomer is methyl methacrylate, and the soft monomer is butyl acrylate.

[0024] Preferably, in step (2), the photothermal particle dispersion: hard monomer: soft monomer: initiator = (0.6-0.7):1:(0.2-2.5):(0.024-0.125).

[0025] Preferably, in step (2), the reaction temperature is 60-85℃, and the reaction time is 10h-24h.

[0026] Preferably, in step (2), the polymer-coated photothermal particle powder particle size is 0.5-5μm.

[0027] Preferably, in step (3), the base polymer is polyester or polyamide.

[0028] Preferably, in step (3), the mass ratio of the polymer-coated photothermal particle powder is 5%-10%.

[0029] Preferably, in step (3), the pigment is one or more of iron oxide yellow, titanium nickel yellow, iron oxide red, iron oxide green, chromium green, iron oxide orange, chromium black, and cobalt blue, and the mass ratio is 5%-20%.

[0030] Preferably, in step (3), the ultraviolet absorber is TINUVIN 326, TINUVIN 1130 or JYSORB-UV326, and the mass ratio is 0.5%-5%.

[0031] Preferably, in step (4), the mass ratio of the photothermal particle / pigment blend master batch is 0.5%-6%.

[0032] The application also provides a preparation method of a camouflage fabric with a warming function, comprising the steps of:

[0033] The prepared colored fiber with temperature rising function is used as warp and weft yarns on a loom, and the warp and weft yarns are interwoven according to a certain rule to obtain a fabric, that is, the fabric is woven by using a plain weave, a twill weave, a satin weave or a double-layer weave structure, the strength and the structure gap of the fabric are given by adjusting the density parameters of the warp and weft directions, and a camouflage fabric with temperature rising function is prepared. By adjusting the number of fibers per unit length in the warp and weft directions, the good air permeability and hand feeling of the thermochromic fabric are realized by using the gaps between the fibers and the yarns, the problems of poor air permeability and hard hand feeling caused by the coating process are effectively solved, and the wearability of the fabric is significantly improved.

[0034] Preferably, the twill is one of 2 / 1 twill, 3 / 1 twill, 3 / 3 twill or 2 / 1 double twill.

[0035] Compared with the prior art, the present application has the following beneficial effects: (1) the present application selects cesium tungsten bronze nanoparticles as the photothermal particles, utilizes the high absorption of the particles in the ultraviolet and near-infrared wave bands to ensure that the material has high light absorption and temperature rising performance, and the material has high transmittance in the visible light and displays a light blue color, thereby reducing the influence on the coloring performance of the material; in order to improve the stability of the photothermal particles in the field environment, an acrylate polymer is used as a wall material, and the photothermal particles are used as a core material to prepare the photothermal particles coated with the acrylate polymer; (2) the present application is woven by using a plain weave, a twill weave, a satin weave or a double-layer weave structure, the strength and the structure gap of the fabric are given by adjusting the density parameters of the warp and weft directions, and a camouflage fabric with temperature rising function is prepared, the number of fibers per unit length in the warp and weft directions is adjusted, the gaps between the fibers and the yarns are utilized to realize the good air permeability and hand feeling of the thermochromic fabric, the problems of poor air permeability and hard hand feeling caused by the coating process are effectively solved, and the wearability of the fabric is significantly improved; (3) the camouflage fabric with temperature rising function can realize temperature rising of 10-18℃, has good air permeability and hand feeling, and has a water washing, rubbing and sunlight fastness of 4 levels or more; (4) the present application has good application prospect in the fields of textiles, camouflage and military industry. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The temperature rising performance curve diagram of Example 1 and Comparative Example 1.

[0037] Figure 2 The temperature rising performance curve diagram of Example 2 and Comparative Example 2.

[0038] Figure 3 The temperature rising performance curve diagram of Example 3 and Comparative Example 3.

[0039] Figure 4 The temperature rising performance curve diagram of Example 4 and Comparative Example 4.

[0040] Figure 5 The temperature rise performance curve of Example 5 and Comparative Example 5.

[0041] Figure 6 The temperature rise performance curve of Example 5 and Comparative Example 6.

[0042] Figure 7 The temperature rise performance curve of Example 5 and Comparative Example 7. DETAILED DESCRIPTION

[0043] The following describes the preferred embodiments of the present application, and it should be understood that the embodiments are for better explaining the present application, and are not used to limit the present application.

[0044] The following describes the preferred embodiments of the present application, and it should be understood that the embodiments are for better explaining the present application, and are not used to limit the present application.

[0045] 1. Temperature rise performance

[0046] Under the condition of temperature (20±2)℃ and relative humidity (65±2)%, using XR-3 light heat performance tester, adopting xenon arc lamp as the irradiation light source, the sample is placed under a certain irradiation intensity, the temperature of the sample changes due to the absorption of light energy, the temperature sensor is used to test the temperature of the sample, and the temperature change of the sample at each time point within 10 min of irradiation and 10 min of closing the light source is recorded, and the maximum temperature rise value, the average temperature rise value and the temperature rise value at the end of the test within 20 min are calculated.

[0047] 2. Air permeability

[0048] Under the condition of temperature (20±2)℃ and relative humidity (65±2)%, using YG461E-III full-automatic air permeability tester, 10 pieces of sample with an area greater than 20 cm 2 are selected. The air permeability of the sample fabric is tested. The reasonable value in the test results is selected and the average value is taken.

[0049] 3. Hand feeling

[0050] The fabric is cut into appropriate size according to the reference, three of each sample are cut, the sample is put into the Fubao instrument according to the operation rules, the test result is recorded.

[0051] Example 1

[0052] A preparation method of a sandy colored fabric with temperature rise function, comprising the following steps:

[0053] (1) Preparation of light-heat particle dispersion: 45 g of Cs 0.32The WO3 photo-thermal particles were dispersed in 300 g of 20% 85A aqueous solution, and were transferred to a grinder for grinding at 5000 r / min for 12 h to prepare a photo-thermal particle dispersion;

[0054] (2) Preparation of polymer-coated photo-thermal particle powder: 60 g of the photo-thermal particle dispersion was heated to 70°C under nitrogen and 1.08 g of azobisdimethylamid hydrochloride, 12 g of methyl methacrylate and 24 g of butyl acrylate were added while stirring, and the reaction was maintained at 70°C for 12 h to obtain polymer-coated photo-thermal particles, which were then spray-dried to obtain polymer-coated photo-thermal particle powder;

[0055] (3) Preparation of photo-thermal particle / pigment blended masterbatch: 785 g of polyester masterbatch, 80 g of polymer-coated photo-thermal particle powder, 30 g of ultraviolet absorber JYSORB-UV326, 65 g of red iron oxide, 36 g of yellow iron oxide and 4 g of chromium black were melt blended and extruded to prepare a sandy color photo-thermal particle / pigment blended masterbatch;

[0056] (4) Preparation of sandy color fiber with warming function: 950 g of polyester masterbatch was blended with 50 g of the sandy color photo-thermal particle / pigment blended masterbatch and was subjected to a spinning process to obtain a sandy color fiber with warming function.

[0057] (5) Preparation of sandy color fabric with warming function: the sandy color fiber with warming function was used as warp and weft yarns, respectively, and was woven on a water jet loom in a 2 / 1 double twill weave to obtain a sandy color fabric with warming function having a warp density of 115 ends / inch and a weft density of 97 ends / inch.

[0058] Comparative Example 1

[0059] A method for preparing a sandy color fabric, comprising the following steps:

[0060] (1) Preparation of pigment blended masterbatch: 865 g of polyester masterbatch, 30 g of ultraviolet absorber JYSORB-UV326, 65 g of red iron oxide, 36 g of yellow iron oxide and 4 g of chromium black were melt blended and extruded to prepare a sandy color blended masterbatch;

[0061] (4) Preparation of sandy color fiber: 950 g of polyester masterbatch was blended with 50 g of the sandy color blended masterbatch and was subjected to a spinning process to obtain a sandy color fiber.

[0062] (5) Preparation of sandy color fabric: the sandy color fiber was used as warp and weft yarns, respectively, and was woven on a water jet loom in a 2 / 1 double twill weave to obtain a sandy color fabric having a warp density of 115 ends / inch and a weft density of 97 ends / inch.

[0063] Example 2

[0064] A preparation method of a red clay colored fabric with a heating function, comprising the following steps:

[0065] (1) Preparation of photo-thermal particle dispersion: 45 g of Cs 0.32 The WO3 photo-thermal particles are dispersed in 300 g of 20% 85A aqueous solution, and are transferred to a grinder for grinding at 5000 r / min for 12 h to prepare a photo-thermal particle dispersion;

[0066] (2) Preparation of polymer-coated photo-thermal particle powder: 60 g of the photo-thermal particle dispersion is heated to 70 DEG C under nitrogen protection, and 1.08 g of azobisdimethylamidino hydrochloride, 12 g of methyl methacrylate and 24 g of butyl acrylate are added while stirring, and the reaction is maintained at 70 DEG C for 12 h to obtain polymer-coated photo-thermal particles, which are then spray-dried to obtain polymer-coated photo-thermal particle powder;

[0067] (3) Preparation of photo-thermal particle / pigment blended masterbatch: 754 g of polyester masterbatch, 80 g of polymer-coated photo-thermal particle powder, 30 g of ultraviolet absorber JYSORB-UV326, 41 g of red iron oxide, 90 g of yellow iron oxide and 5 g of chromium black are melt-blended and extrusion granulated to prepare a red clay colored photo-thermal particle / pigment blended masterbatch;

[0068] (4) Preparation of red clay colored fiber with a heating function: 952 g of polyester masterbatch is blended with 48 g of the red clay colored photo-thermal particle / pigment blended masterbatch, and a spinning process is performed to obtain a red clay colored fiber with a heating function.

[0069] (5) Preparation of red clay colored fabric with a heating function: the red clay colored fiber with a heating function is used as warp and weft yarns respectively, and is woven on an arrow loom in a 3 / 3 twill weave to obtain a red clay colored fabric with a heating function, with a warp density of 122 roots / inch and a weft density of 95 roots / inch.

[0070] Comparative Example 2

[0071] A preparation method of a red clay colored fabric, comprising the following steps:

[0072] (1) Preparation of pigment blended masterbatch: 834 g of polyester masterbatch, 30 g of ultraviolet absorber JYSORB-UV326, 41 g of red iron oxide, 90 g of yellow iron oxide and 5 g of chromium black are melt-blended and extrusion granulated to prepare a red clay colored photo-thermal particle / pigment blended masterbatch;

[0073] (2) Preparation of red clay colored fiber: 952 g of polyester masterbatch is blended with 48 g of the red clay colored blended masterbatch, and a spinning process is performed to obtain a red clay colored fiber.

[0074] (3) Preparation of red clay colored fabric: Red clay colored fibers were used as warp and weft yarns, and were woven on a rapier loom with 3 / 3 twill weave to obtain a red clay colored fabric with a warp density of 122 ends / inch and a weft density of 95 ends / inch.

[0075] Example 3

[0076] A method for preparing a brown clay colored fabric with a warming function, comprising the following steps:

[0077] (1) Preparation of photo-thermal particle dispersion: 45 g of Cs 0.32 The WO3 photo-thermal particles were dispersed in 300 g of 20% 85A aqueous solution, and were transferred to a grinder for grinding at 5000 r / min for 12 h to prepare a photo-thermal particle dispersion;

[0078] (2) Preparation of polymer-coated photo-thermal particle powder: 60 g of the photo-thermal particle dispersion was heated to 70°C under nitrogen and was stirred while 1.08 g of azobisdimethylamidino hydrochloride, 12 g of methyl methacrylate and 24 g of butyl acrylate were added. The reaction was maintained at 70°C for 12 h to obtain polymer-coated photo-thermal particles, which were then spray-dried to obtain polymer-coated photo-thermal particle powder;

[0079] (3) Preparation of photo-thermal particle / pigment blended masterbatch: 823 g of polyester masterbatch, 80 g of polymer-coated photo-thermal particle powder, 30 g of ultraviolet absorber JYSORB-UV326, 23 g of red iron oxide, 30 g of yellow iron oxide, 7.5 g of cobalt blue and 6.5 g of chromium black were melt blended and extruded and granulated to prepare a brown clay colored photo-thermal particle / pigment blended masterbatch;

[0080] (4) Preparation of brown clay colored fiber with a warming function: 950 g of polyester masterbatch was blended with 50 g of the brown clay colored photo-thermal particle / pigment blended masterbatch, and was subjected to a spinning process to obtain a brown clay colored fiber with a warming function.

[0081] (5) Preparation of brown clay colored fabric with a warming function: The brown clay colored fiber with a warming function was used as warp and weft yarns, and was woven on a rapier loom with satin weave to obtain a brown clay colored fabric with a warming function, with a warp density of 118 ends / inch and a weft density of 89 ends / inch.

[0082] Comparative Example 3

[0083] A method for preparing a brown clay colored fabric, comprising the following steps:

[0084] (1) Preparation of pigment blended masterbatch: 903 g of polyester masterbatch, 830 g of ultraviolet absorber JYSORB-UV326, 23 g of red iron oxide, 30 g of yellow iron oxide, 7.5 g of cobalt blue and 6.5 g of chromium black were melt blended and extruded and granulated to prepare a brown clay colored pigment blended masterbatch;

[0085] (2) Preparation of brownish fiber: 950 g polyester masterbatch was blended with 50 g brownish photo-thermal particle / pigment blending masterbatch and a brownish fiber was obtained through a spinning process.

[0086] (3) Preparation of brownish fabric: the brownish fiber was used as warp and weft yarns respectively, and a brownish fabric with warp density of 118 ends / inch and weft density of 89 ends / inch was obtained through weaving on a rapier loom in a satin weave.

[0087] Example 4

[0088] A preparation method of a loess-colored fabric with a warming function, comprising the following steps:

[0089] (1) Preparation of photo-thermal particle dispersion: 45 g Cs 0.32 The WO3 photo-thermal particles were dispersed in 300 g of 20% 85A aqueous solution, and were transferred to a grinder for grinding at 5000 r / min for 12 h to prepare a photo-thermal particle dispersion;

[0090] (2) Preparation of polymer-coated photo-thermal particle powder: 60 g of the photo-thermal particle dispersion was heated to 70°C under nitrogen and 1.08 g of azobisdimethylamid hydrochloride, 12 g of methyl methacrylate and 24 g of butyl acrylate were added while stirring, and the reaction was maintained at 70°C for 12 h to obtain polymer-coated photo-thermal particles, which were then spray-dried to obtain polymer-coated photo-thermal particle powder;

[0091] (3) Preparation of photo-thermal particle / pigment blending masterbatch: 759 g of polyester masterbatch, 80 g of polymer-coated photo-thermal particle powder, 30 g of ultraviolet absorber JYSORB-UV326, 38 g of red iron oxide, 82 g of yellow iron oxide and 11 g of chromium black were melt-blended and extruded to prepare a loess-colored photo-thermal particle / pigment blending masterbatch;

[0092] (4) Preparation of loess-colored fiber with a warming function: 950 g of polyester masterbatch was blended with 50 g of black photo-thermal particle / pigment blending masterbatch and a loess-colored fiber with a warming function was obtained through a spinning process;

[0093] (5) Preparation of loess-colored fabric with a warming function: the loess-colored fiber with a warming function was used as warp and weft yarns respectively, and a loess-colored fabric with a warming function with warp density of 108 ends / inch and weft density of 78 ends / inch was obtained through weaving on a rapier loom in a plain weave.

[0094] Comparative Example 4

[0095] A preparation method of a loess-colored fabric, comprising the following steps:

[0096] (1) Preparation of pigment blend masterbatch: 839 g polyester masterbatch, 30 g UV absorber JYSORB-UV326, 38 g red iron oxide, 82 g yellow iron oxide and 11 g chromium black were melt blended and extruded to prepare yellowish-brown colored light-heat particle / pigment blend masterbatch;

[0097] (2) Preparation of yellowish-brown colored fiber: 950 g polyester masterbatch was blended with 50 g black light-heat particle / pigment blend masterbatch and subjected to a spinning process to obtain yellowish-brown colored fiber.

[0098] (3) Preparation of yellowish-brown colored fabric: the yellowish-brown colored fiber was used as warp and weft yarns respectively, and was woven on a rapier loom with plain weave to obtain a yellowish-brown colored fabric with a warp density of 108 ends / inch and a weft density of 78 ends / inch.

[0099] Example 5

[0100] A method for preparing a black fabric with warming function, comprising the following steps:

[0101] (1) Preparation of light-heat particle dispersion: 45 g of Cs 0.32 WO3 light-heat particles were dispersed in 300 g of 20% 85A aqueous solution, and were transferred to a grinder for grinding at 5000 r / min for 12 h to prepare light-heat particle dispersion;

[0102] (2) Preparation of polymer-coated light-heat particle powder: 60 g of light-heat particle dispersion was weighed, heated to 70°C under nitrogen, and 1.08 g of azobisdimethylamidino hydrochloride, 12 g of methyl methacrylate and 24 g of butyl acrylate were added while stirring, and the reaction was maintained at 70°C for 12 h to obtain polymer-coated light-heat particles, which were then spray dried to obtain polymer-coated light-heat particle powder;

[0103] (3) Preparation of light-heat particle / pigment blend masterbatch: 808 g polyester masterbatch, 80 g polymer-coated light-heat particle powder, 30 g UV absorber JYSORB-UV326 and 82 g chromium black were melt blended and extruded to prepare black light-heat particle / pigment blend masterbatch;

[0104] (4) Preparation of black fiber with warming function: 954 g polyester masterbatch was blended with 46 g black light-heat particle / pigment blend masterbatch and subjected to a spinning process to obtain a black fiber with warming function.

[0105] (5) Preparation of black fabric with warming function: the black fiber with warming function was used as warp and weft yarns respectively, and was woven on a rapier loom with 3 / 1 twill weave to obtain a black fabric with warming function with a warp density of 109 ends / inch and a weft density of 79 ends / inch.

[0106] Comparative Example 5

[0107] A method for preparing a black fabric, comprising the following steps:

[0108] (1) Preparation of pigment blend masterbatch: 888 g of polyester masterbatch, 30 g of UV absorber JYSORB-UV326 and 82 g of chromium black are melt blended and extruded to prepare a pigment blend masterbatch;

[0109] (2) Preparation of black fiber: 954 g of polyester masterbatch is blended with 46 g of pigment blend masterbatch and a spinning process is performed to obtain a black fiber with a temperature rising function.

[0110] (3) Preparation of black fabric: the black fiber with a temperature rising function is used as warp and weft yarn respectively, and a 3 / 1 twill fabric is woven on a rapier loom to obtain a black fabric with a warp density of 109 ends / inch and a weft density of 79 ends / inch.

[0111] Comparative Example 6

[0112] A method for preparing a black fabric, comprising the following steps:

[0113] (1) Preparation of photothermal particle dispersion: 45 g of Cs 0.32 Cs2CO3photothermal particles are dispersed in 300 g of 20% concentration 85A aqueous solution, and transferred to a grinder for grinding at 5000 r / min for 12 h to prepare a photothermal particle dispersion; a photothermal particle powder is prepared by spray drying;

[0114] (2) Preparation of photothermal particle / pigment blend masterbatch: 808 g of polyester masterbatch, 80 g of photothermal particle powder, 30 g of UV absorber JYSORB-UV326 and 82 g of chromium black are melt blended and extruded to prepare a black photothermal particle / pigment blend masterbatch;

[0115] (3) Preparation of black fiber with temperature rising function: 954 g of polyester masterbatch is blended with 46 g of black photothermal particle / pigment blend masterbatch and a spinning process is performed to obtain a black fiber with a temperature rising function.

[0116] (4) Preparation of black fabric with temperature rising function: the black fiber with a temperature rising function is used as warp and weft yarn respectively, and a 3 / 1 twill fabric is woven on a rapier loom to obtain a black fabric with a temperature rising function with a warp density of 109 ends / inch and a weft density of 79 ends / inch.

[0117] Comparative Example 7 (coating method)

[0118] (1) Preparation of photothermal particle dispersion: 45 g of Cs 0.32The WO3 photo-thermal particles were dispersed in 300 g of 20% 85A aqueous solution, and were transferred to a grinder for grinding at 5000 r / min for 12 h to prepare a photo-thermal particle dispersion;

[0119] (2) Preparation of polymer-coated photo-thermal particle powder: 60 g of the photo-thermal particle dispersion was weighed, and was heated to 70°C under nitrogen atmosphere, and 1.08 g of azobisdimethylamidino hydrochloride, 12 g of methyl methacrylate and 24 g of butyl acrylate were added while stirring, and the reaction was maintained at 70°C for 12 h to obtain polymer-coated photo-thermal particles, which were then spray-dried to obtain polymer-coated photo-thermal particle powder;

[0120] (3) Preparation of photo-thermal particle / pigment blended coating fabric: 80 g of a binder, 80 g of the polymer-coated photo-thermal particle powder, 10.23 g of chromium black, 12.36 g of a thickening agent and 62.38 g of water were stirred to obtain a photo-thermal particle / pigment blended coating, which was then printed on the surface of a 3 / 1 twill polyester blank fabric with a warp density of 109 threads / inch and a weft density of 79 threads / inch by using a printing machine, and was finally baked at 150°C for 3 min to obtain a photo-thermal particle / pigment blended coating fabric.

[0121] The temperature rising performance test results of Examples 1-5 and the corresponding comparative examples are referred to Figures 1-7 The air permeability and hand feeling test results are referred to Table 1. Figures 1-7 It can be seen that, compared with the fabric without the addition of polymer-coated photo-thermal particles, the fabric with the addition of polymer-coated photo-thermal particles has a significant temperature rising performance, and the temperature rising is 10-18°C. As can be seen from Table 1, the temperature rising fabric obtained by the spinning method has better air permeability and hand feeling than the temperature rising fabric obtained by the coating method. In summary, the present application ensures that the material has high light absorption and temperature rising performance, and has good air permeability and hand feeling.

[0122] Table 1 Air permeability and hand feeling of examples and comparative examples

[0123]

[0124]

Claims

1. A method for producing a colored fiber having a temperature- increasing function, characterized by: Cesium tungsten bronze Cs m W n O3 nanoparticles as photothermal particles, using acrylate polymer as wall material, photothermal particles as core material, preparing acrylate polymer coated photothermal particles, then using acrylate polymer coated photothermal particles as temperature raising particles, inorganic pigments as coloring particles, high molecular polymer as fiber forming polymer, using melt spinning method to obtain colored fibers with temperature raising function; The method comprises the following steps: (1) preparing a photothermal particle dispersion: dispersing the photothermal particles in a dispersant aqueous solution and transferring to a grinder to prepare the photothermal particle dispersion after grinding; (2) preparing polymer-coated photothermal particle powder: weighing the photothermal particle dispersion, heating to a set temperature after nitrogen blowing, and adding an initiator, a soft monomer and a hard monomer while stirring, and obtaining the polymer-coated photothermal particle powder by spray drying after the reaction at the set temperature is completed; (3) preparing a photothermal particle / pigment blending master batch: melt blending and extruding the fiber base polymer master batch, the polymer-coated photothermal particle powder, the ultraviolet absorber and the pigment to prepare the photothermal particle / pigment blending master batch; (4) preparing a colored fiber with a temperature raising function: blending the fiber base polymer master batch with the photothermal particle / pigment master batch, drying in a vacuum drum dryer at a set temperature, and obtaining a colored fiber with a temperature raising function by melt spinning. The cesium tungsten bronze Cs m W n O3 m / n = (0.15-0.52):

1.

2. The method of claim 1, wherein the colored fiber having a temperature increasing function is prepared by the steps of: The concentration of the dispersant aqueous solution is 20%, the dispersant is DM-1501, AD-4600, 85A or MF; the mass ratio of the photothermal particles to the dispersant aqueous solution is 1:5-10; the rotation speed of the grinder is 3000-6000 r / min, and the grinding time is 8-15 h. ​ 3. The method of claim 1, wherein the colored fiber having a temperature increasing function is prepared by the steps of: The mass ratio of the photothermal particle dispersion, the hard monomer, the soft monomer and the initiator is 0.6-0.7:1:0.2-2.5:0.024-0.125; the initiator is azobisdimethylamidine hydrochloride, the hard monomer is methyl methacrylate, and the soft monomer is butyl acrylate. ​ 4. The method of claim 1, wherein the colored fiber having a temperature- increasing function is prepared by the steps of: The reaction temperature in step (2) is 60-85℃, and the reaction time is 10 h-24 h. ​ 5. The method of claim 1, wherein the colored fiber having a temperature- increasing function is prepared by the steps of: The particle size of the polymer-coated photothermal particle powder is 0.5-5 μm, the fiber base polymer is polyester or polyamide, the mass percentage of the polymer-coated photothermal particle powder in the photothermal particle / pigment blending master batch is 5%-10%, the pigment is one or more of yellow iron oxide, titanium nickel yellow, red iron oxide, green iron oxide, chromium green, orange iron oxide, chromium black and cobalt blue, the mass percentage of the pigment in the photothermal particle / pigment blending master batch is 5%-20%, the ultraviolet absorber is TINUVIN 326, TINUVIN 1130 or JYSORB-UV326, and the mass percentage of the ultraviolet absorber in the photothermal particle / pigment blending master batch is 0.5%-5%. ​ 6. The method of claim 1, wherein the colored fiber having a temperature increasing function is prepared by the steps of: In step (4), the mass percentage of the photothermal particle / pigment blending master batch in the blending of the fiber base polymer master batch and the photothermal particle / pigment blending master batch is 0.5%-6%. ​ 7. A method for preparing a camouflage fabric with a warming function, characterized in that: The colored fiber with a temperature raising function according to any one of claims 1-6 is used as warp and weft yarns, and a camouflage fabric with a temperature raising function is obtained by weaving the warp and weft yarns according to a fabric weaving method.

8. The method of claim 7, wherein the temperature-increasing camouflage fabric is prepared by the steps of: The fabric weaving method is plain weave, twill weave, satin weave or double-layer weave, and the twill weave is 2 / 1 twill, 3 / 1 twill, 3 / 3 twill or 2 / 1 double twill. ​

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