Thermal insulation material as well as preparation method and application thereof

Abstract

The invention relates to a thermal insulation material and a preparation method and application thereof, the preparation method comprises the following steps: (1) using a finishing liquid to carry out pad dyeing on a fabric to obtain a dyed fabric; the finishing liquid comprises tungsten oxide; and (2) printing a printing paste on the dyed fabric to obtain the thermal insulation material, the component of the printing paste comprises lanthanum oxide. The thermal insulation material prepared by adopting the preparation method provided by the invention not only can actively absorb light energy and convert the light energy into heat energy in a low-temperature environment, but also can perform temperature rise and thermal insulation through far infrared radiation, so that the thermal insulation material has the functions of light absorption heating and far infrared radiation temperature rise at the same time, can achieve a dual thermal insulation effect, is relatively high in functional index, and is suitable for popularization and application. And a multi-scene warm keeping function can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile materials, and particularly relates to a thermal insulation material, a preparation method thereof, and an application thereof. Background Art

[0002] With the continuous improvement of people's requirements for the comfort and functionality of clothing, traditional thermal insulation materials can no longer meet the increasingly diverse needs of consumers. In outdoor sports, extreme climates, and cold environments, materials that can maintain a lightweight wearing experience while efficiently providing thermal insulation performance become particularly important.

[0003] Currently, the existing thermal insulation materials on the market often rely on increasing the thickness or using traditional fillers for thermal insulation. However, these methods usually increase the weight and volume of the clothing, affecting the wearing comfort. Although some functional thermal insulation materials have a certain temperature rise effect, their thermal insulation effect mostly depends on the external temperature or the heat generated by movement, and it is difficult to quickly warm up in a low-temperature environment.

[0004] CN108576984A discloses a far-infrared thermal insulation fabric, and CN102860592A discloses a far-infrared multifunctional thermal insulation clothing and a manufacturing method thereof. Although these far-infrared materials have a good heat retention effect, they lack sufficient utilization of light in the environment and cannot achieve the effect of active heat absorption.

[0005] Therefore, there is an urgent need to provide a new type of material that can actively absorb environmental light and convert it into heat energy, and at the same time utilize far-infrared rays to achieve the temperature rise and thermal insulation effect. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a thermal insulation material, a preparation method thereof, and an application thereof. Through the design of the preparation raw materials and processes, the thermal insulation material can actively absorb light energy and convert it into heat energy in a low-temperature environment, and at the same time can perform temperature rise and thermal insulation through far-infrared radiation. Thus, it has the functions of light absorption and heat generation and far-infrared radiation temperature rise at the same time, can achieve a double thermal insulation effect, and has high functional indicators, and can realize multi-scene thermal insulation functions.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] In the first aspect, the present invention provides a preparation method of a thermal insulation material, and the preparation method includes the following steps:

[0009] (1) Pad-dyeing a fabric with a finishing solution to obtain a dyed fabric; the components of the finishing solution include tungsten oxide;

[0010] (2) Printing the printed paste on the dyed fabric to obtain the thermal insulation material; the components of the printed paste include lanthanum oxide.

[0011] In the present invention, tungsten oxide and lanthanum oxide are applied to the same fabric through different processes. Through the composite technology of the light-absorbing material tungsten oxide and the far-infrared heating material lanthanum oxide, the thermal insulation material can not only actively absorb light energy and convert it into heat energy in a low-temperature environment, but also conduct temperature rise and heat preservation through far-infrared radiation, achieving the effect of double heat preservation.

[0012] The following are the preferred technical solutions of the present invention, but do not limit the technical solutions provided by the present invention. Through the following preferred technical solutions, the objectives and beneficial effects of the present invention can be better achieved.

[0013] As a preferred technical solution, in terms of mass percentage content, the finishing solution comprises the following components:

[0014]

[0015] The disperse dye in the finishing solution is 5-8%, for example, it can be 5.2%, 5.4%, 5.6%, 5.8%, 6%, 6.2%, 6.4%, 6.6%, 6.8%, 7%, 7.2%, 7.4%, 7.6%, 7.8%, etc.

[0016] The mass percentage content of tungsten oxide in the finishing solution is 5-16%, for example, it can be 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, 12.5%, 13%, 13.5%, 14%, 14.5%, 15%, 15.5%, etc.

[0017] The mass percentage content of the first crosslinking agent in the finishing solution is 3-8%, for example, it can be 3.2%, 3.5%, 3.8%, 4%, 4.2%, 4.5%, 4.8%, 5%, 5.2%, 5.5%, 5.8%, 6%, 6.2%, 6.5%, 6.8%, 7%, 7.2%, 7.5%, 7.8%, etc.

[0018] The mass percentage content of the surfactant in the finishing solution is 10-12%, for example, it can be 10.2%, 10.4%, 10.6%, 10.8%, 11%, 11.2%, 11.4%, 11.6%, 11.8%, etc.

[0019] Preferably, the disperse dye comprises an azo-type disperse dye and / or a heterocyclic-type disperse dye.

[0020] Preferably, the first crosslinking agent comprises a polysiloxane and / or a first polycarboxylic acid crosslinking agent.

[0021] Preferably, the first polycarboxylic acid crosslinking agent comprises butanetetracarboxylic acid.

[0022] Preferably, the surfactant includes any one or a combination of at least two of secondary alkyl sulfonate, sodium sulfomethyl fatty acid ester, or sodium dodecylbenzenesulfonate.

[0023] Preferably, the components of the finishing solution further include a first dispersant and / or a first binder.

[0024] Preferably, the first dispersant includes any one or a combination of at least two of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, naphthalene sulfonic acid dispersant, or polycarboxylic acid dispersant.

[0025] Preferably, the mass percentage content of the first dispersant in the finishing solution is 10-15%, for example, it can be 10.2%, 10.5%, 10.8%, 11%, 11.2%, 11.5%, 11.8%, 12%, 12.2%, 12.5%, 12.8%, 13%, 13.2%, 13.5%, 13.8%, 14%, 14.2%, 14.5%, 14.8%, etc.

[0026] Preferably, the first binder includes any one or a combination of at least two of polyurethane adhesives, polyvinyl acetate adhesives, polyacrylate adhesives, or butadiene adhesives.

[0027] Preferably, the mass percentage content of the first binder in the finishing solution is 4-10%, for example, it can be 4.2%, 4.5%, 4.8%, 5%, 5.2%, 5.5%, 5.8%, 6%, 6.2%, 6.5%, 6.8%, 7%, 7.2%, 7.5%, 7.8%, 8%, 8.2%, 8.5%, 8.8%, 9%, 9.2%, 9.5%, 9.8%, etc.

[0028] Preferably, the preparation method of the finishing solution includes the following steps:

[0029] (S1) Mix the disperse dye, tungsten oxide, the first crosslinking agent, the surfactant, optionally the first dispersant, optionally the first binder, and a part of water to obtain a mixed solution;

[0030] (S2) Grind the mixed solution, and add the remaining part of water during the grinding process to obtain the finishing solution.

[0031] Preferably, the mass ratio of the part of water in step (S1) to the remaining part of water in step (S2) is 1:(1.5-3), for example, it can be 1:1.6, 1:1.8, 1:2, 1:2.2, 1:2.4, 1:2.6, 1:2.8, etc.

[0032] Preferably, the grinding medium used in step (S2) for grinding is zirconium beads.

[0033] Preferably, the rotation speed of the grinding in step (S2) is 6000 - 10000 rpm, for example, it can be 6500 rpm, 7000 rpm, 7500 rpm, 8000 rpm, 8500 rpm, 9000 rpm, 9500 rpm, etc.

[0034] Preferably, the grinding time in step (S2) is 60 - 90 min, for example, it can be 62 min, 65 min, 68 min, 70 min, 72 min, 75 min, 78 min, 80 min, 82 min, 85 min, 88 min, etc.

[0035] Preferably, by mass percentage, the printing paste comprises the following components:

[0036]

[0037] The mass percentage of lanthanum oxide in the printing paste is 10 - 16%, for example, it can be 10.2%, 10.5%, 10.8%, 11%, 11.2%, 11.5%, 11.8%, 12%, 12.2%, 12.5%, 12.8%, 13%, 13.2%, 13.5%, 13.8%, 14%, 14.2%, 14.5%, 14.8%, 15%, 15.2%, 15.5%, 15.8%, etc.

[0038] The mass percentage of volcanic rock in the printing paste is 5 - 8%, for example, it can be 5.2%, 5.4%, 5.6%, 5.8%, 6%, 6.2%, 6.4%, 6.6%, 6.8%, 7%, 7.2%, 7.4%, 7.6%, 7.8%, etc.

[0039] The mass percentage of the second cross - linker in the printing paste is 1 - 3%, for example, it can be 1.2%, 1.4%, 1.6%, 1.8%, 2%, 2.2%, 2.4%, 2.6%, 2.8%, etc.

[0040] Preferably, the second cross - linker includes epoxy - compound cross - linkers and / or second polycarboxylic - acid cross - linkers.

[0041] Preferably, the epoxy - compound cross - linkers include trimethylolpropane triglycidyl ether.

[0042] Preferably, the second polycarboxylic - acid cross - linkers include maleic acid and / or itaconic acid.

[0043] Preferably, the components of the printing paste further include a second dispersant.

[0044] Preferably, the second dispersant includes any one or a combination of at least two of a hyperdispersant, a fatty alcohol polyoxyethylene ether, a naphthalene sulfonic acid dispersant, or a polycarboxylic acid dispersant.

[0045] Preferably, the mass percentage content of the second dispersant in the printing paste is 5-8%, for example, it can be 5.2%, 5.4%, 5.6%, 5.8%, 6%, 6.2%, 6.4%, 6.6%, 6.8%, 7%, 7.2%, 7.4%, 7.6%, 7.8%, etc.

[0046] Preferably, the components of the printing paste further include an aminocarboxylic complexing agent.

[0047] Preferably, the mass percentage content of the aminocarboxylic complexing agent in the printing paste is 3-5%, for example, it can be 3.2%, 3.4%, 3.6%, 3.8%, 4%, 4.2%, 4.4%, 4.6%, 4.8%, etc.

[0048] Preferably, the components of the printing paste further include a second binder.

[0049] Preferably, the second binder includes any one or a combination of at least two of a polyvinyl acetate binder, a polyacrylate binder, or a butadiene binder.

[0050] Preferably, the mass percentage content of the second binder in the printing paste is 1-5%, for example, it can be 1.2%, 1.5%, 1.8%, 2%, 2.2%, 2.5%, 2.8%, 3%, 3.2%, 3.5%, 3.8%, 4%, 4.2%, 4.5%, 4.8%, etc.

[0051] Preferably, the components of the printing paste further include a thickening agent.

[0052] Preferably, the thickening agent includes an acrylic copolymer thickening agent and / or a polyurethane thickening agent.

[0053] Preferably, the mass percentage content of the thickening agent in the printing paste is 3-4%, for example, it can be 3.1%, 3.2%, 3.3%, 3.4%, 3.5%, 3.6%, 3.7%, 3.8%, 3.9%, etc.

[0054] Preferably, the particle size of the tungsten oxide is 50-200 nm, for example, it can be 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, 150 nm, 160 nm, 170 nm, 180 nm, 190 nm, etc.

[0055] Preferably, the D of the solid particles in the finishing liquid50 The particle size is 50 - 300 nm, and for example, it can be 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, 150 nm, 160 nm, 170 nm, 180 nm, 190 nm, 200 nm, 210 nm, 220 nm, 230 nm, 240 nm, 250 nm, 260 nm, 270 nm, 280 nm, 290 nm, etc.

[0056] Preferably, the particle size of the lanthanum oxide is 40 - 200 nm, and for example, it can be 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, 150 nm, 160 nm, 170 nm, 180 nm, 190 nm, etc.

[0057] Preferably, the material of the fabric includes polyester or nylon.

[0058] Preferably, the thickness of the fabric is 0.04 - 0.08 mm, and for example, it can be 0.042 mm, 0.045 mm, 0.048 mm, 0.05 mm, 0.052 mm, 0.055 mm, 0.058 mm, 0.06 mm, 0.062 mm, 0.065 mm, 0.068 mm, 0.07 mm, 0.072 mm, 0.075 mm, 0.078 mm, etc.

[0059] Preferably, the processing method of pad dyeing is two - dip two - nip.

[0060] Preferably, the liquor uptake rate of pad dyeing is 70 - 99%, and for example, it can be 72%, 74%, 76%, 78%, 80%, 82%, 84%, 86%, 88%, 90%, 92%, 94%, 96%, 98%, etc.

[0061] In the present invention, the calculation method of the liquor uptake rate is: Liquor uptake rate = (total mass of the fabric after pad dyeing - mass of the fabric before pad dyeing) / mass of the fabric before pad dyeing × 100%.

[0062] Preferably, before the pad dyeing, the finishing solution is diluted with water into a finishing solution for pad dyeing with a mass percentage content of 10 - 25% of the finishing solution, and for example, it can be 11%, 12%, 14%, 16%, 17%, 18%, 20%, 22%, 24%, etc.

[0063] Preferably, after the pad dyeing is completed, it further includes the steps of first drying, baking, water washing, and second drying in sequence.

[0064] Preferably, the temperatures of the first drying and the second drying are each independently 60-80°C, and for example, can be 62°C, 64°C, 66°C, 68°C, 70°C, 72°C, 74°C, 76°C, 78°C, etc.

[0065] Preferably, the times of the first drying and the second drying are each independently 10-40 min, and for example, can be 12 min, 14 min, 16 min, 18 min, 20 min, 22 min, 24 min, 26 min, 28 min, 30 min, 32 min, 34 min, 36 min, 38 min, etc.

[0066] Preferably, the temperature of the curing is 180-200°C, and for example, can be 182°C, 184°C, 186°C, 188°C, 190°C, 192°C, 194°C, 196°C, 198°C, etc.

[0067] Preferably, the time of the curing is 10-15 min, and for example, can be 10.5 min, 11 min, 11.5 min, 12 min, 12.5 min, 13 min, 13.5 min, 14 min, 14.5 min, etc.

[0068] Preferably, the temperature of the water washing is 80-85°C, and for example, can be 80.5°C, 81°C, 81.5°C, 82°C, 82.5°C, 83°C, 83.5°C, 84°C, 84.5°C, etc.

[0069] Preferably, the time of the water washing is 15-30 min, and for example, can be 15.5 min, 16 min, 16.5 min, 17 min, 17.5 min, 18 min, 18.5 min, 19 min, 19.5 min, 20 min, 22 min, 24 min, 26 min, 28 min, etc.

[0070] Preferably, the printing method includes rotary screen printing and / or flat screen printing.

[0071] Preferably, the preparation method specifically includes the following steps:

[0072] (1) Dilute the finishing solution with water to obtain a padding finishing solution with a mass percentage content of the finishing solution of 10-25%. After padding the polyester or nylon with a thickness of 0.04-0.08 mm by using the padding finishing solution through a two-dip two-roll processing method, perform the first drying, curing, water washing, and the second drying in sequence to obtain the dyed polyester or nylon.

[0073] In terms of mass percentage, the finishing solution includes the following components:

[0074]

[0075] (2) Print the printing paste on the dyed polyester or nylon to obtain the thermal insulation material;

[0076] By mass percentage, the printing paste comprises the following components:

[0077]

[0078] In a second aspect, the present invention provides a thermal insulation material prepared by the preparation method described in the first aspect.

[0079] In a third aspect, the present invention provides an application of the thermal insulation material described in the second aspect in outdoor clothing, winter clothing, outdoor equipment, tents or sleeping bags.

[0080] Compared with the prior art, the present invention has the following beneficial effects:

[0081] (1) In the present invention, tungsten oxide and lanthanum oxide are applied to the same fabric through different processes. Through the interaction between the two, the fabric has the functions of light absorption and heat generation and far-infrared radiation temperature rise at the same time, achieving a double thermal insulation effect, and the functional indexes are relatively high, enabling multi-scene thermal insulation functions;

[0082] (2) For the thermal insulation material provided by the present invention, the maximum temperature rise of light storage heat can reach 18-26 °C; the far-infrared temperature rise can reach 3.2-3.7 °C. Specific Embodiments

[0083] To facilitate the understanding of the present invention, the following examples are listed. Those skilled in the art should understand that the examples are only for helping to understand the present invention and should not be regarded as specific limitations on the present invention.

[0084] The sources of some components in the preparation examples and comparative preparation examples are as follows:

[0085] (1) Tungsten oxide: purchased from Jinlei Technology, with a particle size of 50 nm;

[0086] (2) Cross-linking agent

[0087] Polysiloxane, purchased from Anhui Mingyi Silicon Industry Co., Ltd., CAS No.: 68952-30-7;

[0088] Epoxy compound cross-linking agent, purchased from Hubei Xinghengye, model number 110-18-9;

[0089] (3) Surfactant

[0090] Secondary alkyl sulfonate, purchased from Clariant, model number 68037-49-0;

[0091] Sodium sulfofatty acid methyl ester, purchased from Hubei Zhonglong Kangsheng, with the model number 93348-22-2;

[0092] (4) Dispersant

[0093] Fatty alcohol polyoxyethylene ether, purchased from Ron, with the model number R128348;

[0094] Fatty acid polyoxyethylene ester, purchased from Wuhan Jixin Yibang, with the model number 106-08-1;

[0095] Polycarboxylic acid dispersant, purchased from Bump Chemical, with the model number BP5040;

[0096] (5) Adhesive

[0097] Polyurethane adhesive, purchased from Xinhui Chemical, with the model number Xh-fw201;

[0098] Polyvinyl acetate adhesive, purchased from Nantong Runfeng Petrochemical Co., Ltd., with the model number C2233;

[0099] Polyacrylate adhesive, purchased from Dongguan Taiyang Textile Products Co., Ltd., with the model numbers TY-3565S / 3566S;

[0100] (6) Lanthanum oxide: purchased from Jinlei Technology, with a particle size of 40 nm, CAS: 1312-81-8;

[0101] (7) Acrylic copolymer thickener: purchased from Guangzhou Yingrui Chemical YR807;

[0102] (8) Volcanic rock: purchased from Shijiazhuang Juou New Materials, with the model number 3001;

[0103] (9) Disperse dye: Blue 20, purchased from Zhejiang Wanfeng Chemical Co., Ltd.;

[0104] (10) Amino carboxyl complexing agent: purchased from Shanghai Hengyuan Biology, CAS number: 6381-92-6.

[0105] Preparation Example 1-1

[0106] A finishing solution, in terms of mass percentage, the finishing solution comprises the following components:

[0107]

[0108] The preparation method of the finishing solution includes:

[0109] (S1) Mix the disperse dye, tungsten oxide, polysiloxane, surfactant, dispersant, adhesive and part of water (25% of the total mass of water), and stir them evenly with a stirrer to obtain a mixed solution;

[0110] (S2) Add the mixture to a vertical grinder and add zirconium beads for grinding. The rotational speed of the grinder is 8500 rpm, and the grinding time is 80 min. During the grinding process, measure the particle size of the solid particles in the mixture every 10 min, and control the D 50 particle size of the solid particles in the mixture to be 200 nm, and add the remaining water according to the grinding situation to obtain the finishing liquid.

[0111] Preparation Examples 1-2 to 1-5, Comparative Preparation Examples 1-1 to 1-2

[0112] A finishing liquid, the components of the finishing liquid are shown in Table 1. The dosage unit of each component in Table 1 is “%”. “ / ” in Table 1 means that this substance is not added. The preparation method of the finishing liquid is the same as that of Preparation Example 1-1.

[0113] Table 1

[0114]

[0115] Preparation Example 2-1

[0116] A printing paste, in terms of mass percentage, the printing paste comprises the following components:

[0117]

[0118] The preparation method of the printing paste includes:

[0119] Mix the above substances and stir evenly to obtain the printing paste.

[0120] Preparation Examples 2-2 to 2-5, Comparative Preparation Examples 2-1 to 2-2

[0121] A printing paste, the components of the printing paste are shown in Table 2. The dosage unit of each component in Table 2 is “%”. “ / ” in Table 2 means that this substance is not added. The preparation method of the printing paste is the same as that of Preparation Example 2-1.

[0122] Table 2

[0123]

[0124]

[0125] Example 1

[0126] A thermal insulation material and its preparation method, the preparation method includes the following steps:

[0127] (1) Dilute the finishing liquid provided in Preparation Example 1-1 with distilled water to obtain a pad dyeing finishing liquid with a mass percentage content of 10% of the finishing liquid. Use the pad dyeing finishing liquid to perform one-bath pad dyeing finishing on 100% polyester with a thickness of 0.08 mm by a two-dip two-roll processing method, and the liquor pickup rate is 90%; Process: dip → roll → dip → roll → first drying → baking → washing → second drying to obtain the dyed fabric; The temperature of the two drying processes is 80 °C and the time is 30 min for both; The baking temperature is 180 °C and the time is 10 min; The washing temperature is 85 °C and the time is 30 min;

[0128] (2) Print the pattern on the dyed fabric by flat screen printing with the printing paste provided in Preparation Example 2-1 to obtain the thermal insulation material.

[0129] Example 2

[0130] A thermal insulation material and its preparation method, the preparation method comprising the following steps:

[0131] (1) Dilute the finishing liquid provided in Preparation Example 1-2 with distilled water to obtain a pad dyeing finishing liquid with a mass percentage content of 15% of the finishing liquid. Use the pad dyeing finishing liquid to perform one-bath pad dyeing finishing on 100% nylon with a thickness of 0.08 mm by a two-dip two-roll processing method, and the liquor pickup rate is 85%; Process: dip → roll → dip → roll → first drying → baking → washing → second drying to obtain the dyed fabric; The temperature of the two drying processes is 80 °C and the time is 30 min for both; The baking temperature is 180 °C and the time is 10 min; The washing temperature is 85 °C and the time is 15 min;

[0132] (2) Print the pattern on the dyed fabric by flat screen printing with the printing paste provided in Preparation Example 2-2 to obtain the thermal insulation material.

[0133] Example 3

[0134] A thermal insulation material and its preparation method, the preparation method comprising the following steps:

[0135] (1) Dilute the finishing liquid provided in Preparation Example 1-3 with distilled water to obtain a pad dyeing finishing liquid with a mass percentage content of 25% of the finishing liquid. Use the pad dyeing finishing liquid to perform one-bath pad dyeing finishing on 100% polyester with a thickness of 0.08 mm by a two-dip two-roll processing method, and the liquor pickup rate is 85%; Process: dip → roll → dip → roll → first drying → baking → washing → second drying to obtain the dyed fabric; The temperature of the two drying processes is 80 °C and the time is 30 min for both; The baking temperature is 180 °C and the time is 10 min; The washing temperature is 85 °C and the time is 15 min;

[0136] (2) Print the pattern on the dyed fabric by means of rotary screen printing with the printing paste provided in Preparation Example 2-3 to obtain the thermal insulation material.

[0137] Example 4

[0138] A thermal insulation material and its preparation method, which is different from Example 1 in that the finishing liquid provided in Preparation Example 1-1 in step (1) is replaced with the finishing liquid provided in Preparation Example 1-4 in equal mass, and the printing paste provided in Preparation Example 2-1 in step (2) is replaced with the printing paste provided in Preparation Example 2-4 in equal mass, and the remaining raw materials, process parameters and steps are the same as those in Example 1.

[0139] Example 5

[0140] A thermal insulation material and its preparation method, which is different from Example 1 in that the finishing liquid provided in Preparation Example 1-1 in step (1) is replaced with the finishing liquid provided in Preparation Example 1-5 in equal mass, and the printing paste provided in Preparation Example 2-1 in step (2) is replaced with the printing paste provided in Preparation Example 2-5 in equal mass, and the remaining raw materials, process parameters and steps are the same as those in Example 1.

[0141] Comparative Example 1

[0142] A thermal insulation material and its preparation method, which is different from Example 1 in that the finishing liquid provided in Preparation Example 1-1 in step (1) is replaced with the finishing liquid provided in Comparative Preparation Example 1-1 in equal mass, and the remaining raw materials, process parameters and steps are the same as those in Example 1.

[0143] Comparative Example 2

[0144] A thermal insulation material and its preparation method, which is different from Example 1 in that the finishing liquid provided in Preparation Example 1-1 in step (1) is replaced with the finishing liquid provided in Comparative Preparation Example 1-2 in equal mass, and the remaining raw materials, process parameters and steps are the same as those in Example 1.

[0145] Comparative Example 3

[0146] A thermal insulation material and its preparation method, which is different from Example 1 in that the printing paste provided in Preparation Example 2-1 in step (2) is replaced with the printing paste provided in Comparative Preparation Example 2-1 in equal mass, and the remaining raw materials, process parameters and steps are the same as those in Example 1.

[0147] Comparative Example 4

[0148] A thermal insulation material and its preparation method, which is different from Example 1 in that the printing paste provided in Preparation Example 2-1 in step (2) is replaced with the printing paste provided in Comparative Preparation Example 2-2 in equal mass, and the remaining raw materials, process parameters and steps are the same as those in Example 1.

[0149] Performance Test

[0150] (1) Far-infrared temperature rise: Test is carried out according to the test method provided in GB / T 30127-2013;

[0151] (2) Light absorption and heat generation: Test is carried out according to the test method provided in GB / T 18319-2019 "Test Method for Photothermal Storage Performance".

[0152] The thermal insulation materials provided in Examples 1-5 and Comparative Examples 1-4 are tested according to the above method, and the test results are shown in Table 3 below:

[0153] Table 3

[0154] Far-infrared temperature rise / °C Maximum temperature rise of photo-thermal storage / °C Example 1 3.6 25 Example 2 3.4 20 Example 3 3.7 24 Example 4 3.2 26 Example 5 3.5 18 Comparative Example 1 2.1 10 Comparative Example 2 2.4 14 Comparative Example 3 2.3 16 Comparative Example 4 2.4 16

[0155] It can be seen from the test data in Table 3 that in the present invention, tungsten oxide and lanthanum oxide are applied to the same fabric through different processes. Through the interaction between the two, the obtained thermal insulation material has the functions of light absorption and heat generation and far-infrared radiation temperature rise at the same time, achieving a double thermal insulation effect.

[0156] It can be seen from Comparative Example 1 that the finishing liquid does not contain tungsten oxide, and the absorption rate of the thermal insulation material to near-infrared light decreases significantly, resulting in a reduction in the temperature rise of photothermal storage.

[0157] It can be seen from Comparative Examples 2-4 that the far-infrared temperature rise and the maximum temperature rise of photothermal storage of the thermal insulation material both decrease when the thermal insulation material lacks tungsten oxide or lanthanum oxide. This is because the synergistic effect of tungsten oxide and lanthanum oxide can form a "photo-thermal - radiation" coupling interface. The photothermal layer of tungsten oxide provides a heat source for lanthanum oxide, and the lanthanum oxide particles enhance far-infrared radiation through the vibration of La-O bonds; the lack of either of the two destroys the heat transfer path and increases the interfacial thermal resistance, resulting in a reduction in the temperature rise effect.

[0158] The applicant declares that the present invention uses the above examples to illustrate the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, that is, it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent substitution of each raw material of the product of the present invention, the addition of auxiliary components, the selection of specific methods, etc. all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for preparing a heat-insulating material, characterized in that, The preparation method includes the following steps: (1) Pad-dye the fabric with the finishing liquid to obtain the dyed fabric; the components of the finishing liquid include tungsten oxide; (2) Print the printing paste on the dyed fabric to obtain the thermal insulation material; the components of the printing paste include lanthanum oxide.

2. The preparation method according to claim 1, wherein By mass percentage, the finishing liquid includes the following components:

3. The preparation method according to claim 2, wherein, The disperse dye includes an azo disperse dye and / or a heterocyclic disperse dye; Preferably, the first crosslinking agent includes polysiloxane and / or a first polycarboxylic acid crosslinking agent; Preferably, the first polycarboxylic acid crosslinking agent includes butanetetracarboxylic acid; Preferably, the surfactant includes any one or a combination of at least two of secondary alkyl sulfonate, sodium sulfofatty acid methyl ester, or sodium dodecylbenzenesulfonate; Preferably, the components of the finishing liquid further include a first dispersant and / or a first binder; Preferably, the first dispersant includes any one or a combination of at least two of fatty alcohol polyoxyethylene ether, fatty acid polyoxyethylene ester, naphthalene sulfonic acid dispersant, or polycarboxylic acid dispersant; Preferably, the mass percentage of the first dispersant in the finishing liquid is 10-15%; Preferably, the first binder includes any one or a combination of at least two of polyurethane binder, polyvinyl acetate binder, polyacrylate binder, or butadiene binder; Preferably, the mass percentage of the first binder in the finishing liquid is 4-10%.

4. The preparation method according to claim 2 or 3, characterized in that, The preparation method of the finishing liquid includes the following steps: (S1) Mix the disperse dye, the tungsten oxide, the first crosslinking agent, the surfactant, optionally the first dispersant, optionally the first binder, and a part of water to obtain a mixed liquid; (S2) Grind the mixed liquid, and add the remaining part of water during the grinding process to obtain the finishing liquid; Preferably, the grinding medium used in step (S2) is zirconium beads; Preferably, the rotation speed of the grinding in step (S2) is 6000-10000 rpm; Preferably, the grinding time in step (S2) is 60-90 min.

5. The preparation method according to any one of claims 1-4, characterized in that, By mass percentage, the printing paste includes the following components:

6. The preparation method according to claim 5, characterized in that, The second crosslinking agent includes an epoxy compound crosslinking agent and / or a second polycarboxylic acid crosslinking agent; Preferably, the epoxy compound crosslinking agent includes trimethylolpropane triglycidyl ether; Preferably, the second polycarboxylic acid crosslinking agent includes maleic acid and / or itaconic acid; Preferably, the components of the printing paste further include a second dispersant; Preferably, the second dispersant includes any one or a combination of at least two of hyperdispersant, fatty alcohol polyoxyethylene ether, naphthalene sulfonic acid dispersant, or polycarboxylic acid dispersant; Preferably, the mass percentage of the second dispersant in the printing paste is 5-8%; Preferably, the components of the printing paste further include an aminocarboxylic complexing agent; Preferably, the mass percentage of the aminocarboxylic complexing agent in the printing paste is 3-5%; Preferably, the components of the printing paste further include a second binder; Preferably, the second binder includes any one or a combination of at least two of polyvinyl acetate binders, polyacrylate binders, or butadiene binders; Preferably, the mass percentage content of the second binder in the printing paste is 1-5%; Preferably, the components of the printing paste further include a thickener; Preferably, the thickener includes acrylic copolymer thickeners and / or polyurethane thickeners; Preferably, the mass percentage content of the thickener in the printing paste is 3-4%; 7. The preparation method according to any one of claims 1-6, characterized in that, The particle size of the tungsten oxide is 50-200 nm; Preferably, the D of the solid particles in the finishing liquid 50 particle size is 50 - 300 nm; Preferably, the particle size of the lanthanum oxide is 40-200 nm; Preferably, the material of the fabric includes polyester or nylon; Preferably, the thickness of the fabric is 0.04-0.08 mm; Preferably, the processing method of pad dyeing is two-dip two-roll; Preferably, before the pad dyeing, the finishing solution is diluted with water into a pad dyeing finishing solution with a mass percentage content of 10-25% of the finishing solution; Preferably, after the pad dyeing, the steps of first drying, baking, washing, and second drying are further included in sequence; Preferably, the printing method includes rotary screen printing and / or flat screen printing.

8. The preparation method according to any one of claims 1-7, characterized in that, The preparation method specifically includes the following steps: (1) Dilute the finishing solution with water into a pad dyeing finishing solution with a mass percentage content of 10-25% of the finishing solution, use the pad dyeing finishing solution to pad-dye polyester or nylon with a thickness of 0.04-0.08 mm by a two-dip two-roll processing method, and then perform first drying, baking, washing, and second drying in sequence to obtain dyed polyester or nylon; By mass percentage, the finishing solution includes the following components: (2) Print the printing paste on the dyed polyester or nylon to obtain the thermal insulation material; By mass percentage, the printing paste includes the following components:

9. A thermal insulation material, characterized in that, The thermal insulation material is prepared by the preparation method according to any one of claims 1-8.

10. Application of a thermal insulation material according to claim 9 in outdoor clothing, winter clothing, outdoor equipment, tents, or sleeping bags.

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