Infrared shielding composite coating fabric and preparation method thereof

Abstract

The invention relates to the field of textile fabrics, and discloses an infrared shielding composite coating fabric and a preparation method thereof. The preparation method comprises the following steps: selecting two polyester yarns with the same linear density as yarn raw materials, weaving the two-sided fabric by adjusting an elasticizing process and combining a unique weaving structure design, and then carrying out deep oil removal without using auxiliaries in the whole process, so that the hygroscopicity of the fabric can be greatly improved; the defect that the moisture absorption effect of a polyester fabric is poor and the problem that moisture absorption is poor in later use are solved, meanwhile, the preparation method is easy to implement industrially, low in cost and stable in moisture absorption effect, and the composite coating fabric prepared after being coated with the infrared shielding coating has the excellent infrared shielding effect.

Description

Technical Field

[0001] The present invention relates to the field of textile fabrics, and in particular to an infrared shielding composite coating fabric and a preparation method thereof. Background Art

[0002] With economic development and improved living standards, people's demand for comfortable clothing fabrics is also increasing. However, when people exercise, they produce a large amount of sweat, which should be able to quickly diffuse into the atmosphere through clothing to keep the skin dry and comfortable. Natural fibers have good water and moisture absorption properties, making them comfortable to wear. However, conventional synthetic fibers lack hydrophilic genes in their fiber-forming polymer molecules, resulting in poor hygroscopicity. Synthetic fiber clothing can make people feel stuffy. Currently, infrared shielding fabrics are mostly achieved through coatings. The coatings used mainly include metal powder resin-based temperature control coatings, low-emission multilayer thin-film inorganic metal oxide-based infrared stealth coatings, and coatings with ultrafine metal powder materials and metal oxides as resin-based additives.

[0003] Patent publication number CN107201578A provides a composite fiber for the processing of thermally and moisture-comfortable textiles. This patent prepares hydrophilic polyester fibers by hydrophilically modifying polyester fibers, then blending the resulting hydrophilic polyester fibers with cotton fibers. Nanosilver fibers and other materials are embedded during weaving to create thermally and moisture-comfortable textile fabrics. However, this patent uses multiple different fiber types for the composite, and the excessive number of additives used in the preparation of the hydrophilic polyester fibers makes the overall composition and process complex and difficult to control. Furthermore, after repeated washing, the fabric's hygroscopicity decreases as the additives are reduced. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and solve the problems of poor hygroscopicity, complex process and poor washability of the above-mentioned prior art, and provide an infrared shielding composite coated fabric and a preparation method thereof. The preparation method selects two polyester yarns with the same linear density as yarn raw materials, adjusts the elasticizing process, and combines a unique weaving structure design and process to weave a double-sided cloth fabric, and then performs deep degreasing and does not use auxiliaries throughout the process, which can greatly improve the hygroscopicity of the fabric. It not only solves the shortcomings of poor hygroscopicity of polyester fabrics and the problem of poor hygroscopicity in later use, but also the preparation method of the present invention is easy to industrialize, low in cost, and has a stable hygroscopic effect. The composite coated fabric obtained after coating the infrared shielding coating has an excellent infrared shielding effect.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A method for preparing an infrared shielding composite coating fabric comprises the following steps:

[0007] S1: Preparation of high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn;

[0008] The polyester POY yarn added with high-hygroscopic antibacterial masterbatch and ordinary polyester POY yarn are stretched to obtain high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn;

[0009] S2: preparing double-sided fabric;

[0010] Highly hygroscopic polyester DTY yarn and ordinary polyester DTY yarn are woven into double-sided fabrics through a double-sided knitting machine;

[0011] S3: Preparation of infrared shielding composite coating fabric;

[0012] The double-sided fabric is deeply degreased, dyed and shaped to obtain a polyester fabric, and an infrared shielding coating is coated on the inner layer side of the polyester fabric and cured to obtain an infrared shielding composite coating fabric.

[0013] Preferably, in step S1: in the polyester POY yarn to which the highly hygroscopic antibacterial masterbatch is added, the amount of the highly hygroscopic antibacterial masterbatch added is 25-30 wt%.

[0014] Preferably, in step S1: in the texturizing operation, the deformation temperature in the first hot box is 170-200°C, the stretching ratio is 1.40-1.80, the main network pressure is 0.12-0.25 MPa, the heat setting temperature of the second hot box is 50-170°C, and the winding speed is 300-1200 m / min.

[0015] Preferably, in step S1, the linear density of the high-hygroscopic polyester DTY yarn and the ordinary polyester DTY yarn is 75D.

[0016] Preferably, in step S2, the double-sided fabric includes a double-sided knitted outer layer and an inner layer, the outer layer is knitted with lower needles, and the inner layer is knitted with upper needles, the upper needles and the lower needles are arranged with low heel needles and high heel needles alternately, the high heel needles in the upper needles correspond to the low heel needles in the lower needles, and the low heel needles in the upper needles correspond to the high heel needles in the lower needles.

[0017] Preferably, in step S2, the outer layer and the inner layer are knitted in a four-way loop of first, second, third, and fourth knitting: the first knitting is formed by looping high heel stitches in the lower needles and tucking high heel stitches in the upper needles; the second knitting is formed by looping low heel stitches in the upper needles; the third knitting is formed by looping low heel stitches in the lower needles and tucking low heel stitches in the upper needles; the fourth knitting is formed by looping high heel stitches in the upper needles; and the height of the outer layer loops is 0.8-2.0 mm.

[0018] Preferably, in step S2, the outer layer is woven from the first and third routes, and the yarn used in the outer layer is highly hygroscopic polyester DTY yarn; the inner layer is woven from the second and fourth routes, and the yarn used in the inner layer is ordinary polyester DTY yarn.

[0019] Preferably, in step S2, the double-sided fabric has a double rib structure, and the front and back sides of the double-sided fabric have different effects.

[0020] Preferably, in step S3: deep oil removal includes ultrasonic treatment and desizing and refining.

[0021] Preferably, in step S3, the specific steps of ultrasonic treatment are: performing ultrasonic degreasing on the double-sided fabric twice, the temperatures of the two ultrasonic degreasing times are 65°C hot water and room temperature water respectively, the ultrasonic frequency used in the two ultrasonic degreasing times is 30kHz, and the ultrasonic power is 0.3-1.0W / cm 2 After the treatment, the double-sided fabric is washed with water and the deep degreasing is obtained.

[0022] Preferably, in step S3, the specific steps of desizing and refining are: mixing 1-10% caustic soda, 1-6% polyester, and the balance water, by mass percentage, to obtain a treatment liquid, immersing the fabric after deep degreasing in the treatment liquid at a bath ratio of 1:20-30, and treating at a temperature of 100-125° C. for 65-90 minutes to obtain a double-sided fabric after desizing and refining.

[0023] Preferably, in step S3, the specific steps of dyeing and shaping are: dyeing the desized and refined double-sided fabric through a dyeing machine, dehydrating, drying, and shaping, and no auxiliary agent is used in the whole process.

[0024] Preferably, in step S3, the curing conditions are: curing at a temperature of 70-100° C. for 30 minutes.

[0025] Preferably, in step S3, the infrared shielding coating is prepared by mixing polyurethane and filler in a mass ratio of 20-30:70-80, the filler is nano-cesium-doped tungsten oxide, and the coating thickness is 0.5-0.75 mm.

[0026] Preferably, an infrared shielding composite coating fabric is prepared using the above-mentioned preparation method of the infrared shielding composite coating fabric.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention maintains the same linear density of the two yarns, evenly distributes and interweaves the two yarns through a double rib weaving method, so that the fabric is uniform and smooth; at the same time, due to the difference in hydrophilic properties of the two yarns, the fabric has excellent moisture permeability and air permeability, which improves people's comfort in use; the process of ultrasound + refining and oil removal + auxiliary agent-free finishing also greatly improves the hygroscopicity of the fabric, while ensuring that the fabric still has strong hygroscopicity after multiple washings. Overall, the process of the present invention is easy to implement industrially, low in cost, and has a stable moisture absorption effect, can meet the needs of large-scale production, and has good application prospects.

[0029] 2. In the present invention, the fabric is first physically degreased by utilizing the "cavitation" effect of ultrasonic oscillation. The textile oil particles on the fabric are cracked and dispersed, forming very small particles in an "oil-in-water" emulsified state. These particles are then removed by padding and washing, which is more environmentally friendly. Meanwhile, impurities such as the remaining oil particles and oligomers on the fabric are removed by high-temperature refining, further achieving the purpose of degreasing. Finally, no additives are used throughout the entire process, and only clean water is used. The above process greatly improves the hygroscopicity of the fabric. Compared with fabrics treated with hydrophilic additives, the hygroscopicity of fabrics treated with hydrophilic additives decreases after multiple washings as the additives are reduced. However, the fabrics produced by the present invention can also ensure that they still have strong hygroscopicity after multiple wearing and washing.

[0030] 3. Nano-cesium-doped tungsten oxide is a tungsten bronze nanomaterial with better near-infrared shielding ability and visible light transmittance. The present invention uses polyurethane and filler nano-cesium-doped tungsten oxide to mix to form an infrared shielding coating. The resulting composite coating fabric has excellent infrared shielding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a weaving structure diagram of the double-sided fabric described in the present invention. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Example 1

[0034] This embodiment discloses a method for preparing an infrared shielding composite coating fabric, comprising the following steps:

[0035] S1: Preparation of high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn;

[0036] The polyester POY yarn added with high-hygroscopic antibacterial masterbatch and ordinary polyester POY yarn are stretched to obtain high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn;

[0037] Among them, in the polyester POY yarn with added high hygroscopic antibacterial masterbatch, the addition amount of high hygroscopic antibacterial masterbatch is 25wt%; in the texturing operation, the deformation temperature in the first hot box is 170℃, the stretching ratio is 1.68, the main network pressure is 0.16Mpa, the heat setting temperature of the second hot box is 120℃, and the winding speed is 700m / min; the specification of high hygroscopic polyester DTY yarn is 75D / 72F, and the specification of ordinary polyester DTY yarn is low-elastic light mesh 75D / 24F.

[0038] S2: preparing double-sided fabric;

[0039] Highly hygroscopic polyester DTY yarn and ordinary polyester DTY yarn are woven into double-sided fabrics through a double-sided knitting machine;

[0040] The double-sided fabric includes a double-sided woven outer layer and an inner layer. The outer layer is woven with lower needles, and the inner layer is woven with upper needles. The upper and lower needles are arranged with low heel needles and high heel needles alternately. The high heel needles in the upper needles correspond to the low heel needles in the lower needles, and the low heel needles in the upper needles correspond to the high heel needles in the lower needles.

[0041] The outer and inner layers are knitted in four loops: the first loop is a high heel stitch in the lower needle and a tuck stitch in the upper needle; the second loop is a low heel stitch in the upper needle; the third loop is a low heel stitch in the lower needle and a tuck stitch in the upper needle; the fourth loop is a high heel stitch in the upper needle. The outer layer has a 0.8mm loop height.

[0042] The outer layer is woven from the first and third routes, and the yarn used in the outer layer is highly hygroscopic polyester DTY yarn; the inner layer is woven from the second and fourth routes, and the yarn used in the inner layer is ordinary polyester DTY yarn;

[0043] The structure of double-faced fabric is double rib weave, and the front and back of the double-faced fabric have different effects;

[0044] S3: Preparation of infrared shielding composite coating fabric;

[0045] The double-sided fabric is deeply degreased, dyed, and shaped to obtain a polyester fabric, and an infrared shielding coating is applied to the inner layer side of the polyester fabric, and the coating is cured at 70° C. for 30 minutes to obtain an infrared shielding composite coating fabric;

[0046] Among them, deep degreasing includes ultrasonic treatment and desizing and refining;

[0047] The specific steps of ultrasonic treatment are as follows: the double-sided fabric is subjected to ultrasonic degreasing twice, the temperatures of the two ultrasonic degreasing times are 65℃ high-temperature hot water and room temperature water respectively, the ultrasonic frequency used in the two ultrasonic degreasing times is 30kHz, and the ultrasonic power is 0.8W / cm 2 After the treatment, the double-sided fabric is washed with water and the deep degreasing is obtained;

[0048] The specific steps of desizing and refining are as follows: 5% caustic soda, 5% polyester and the balance water are mixed to obtain a treatment solution, the fabric after deep degreasing is immersed in the treatment solution at a bath ratio of 1:20, and treated at a temperature of 125° C. for 90 minutes to obtain a double-sided fabric after desizing and refining;

[0049] The specific steps of dyeing and shaping are: the double-sided fabric after desizing and scouring is dyed through the dyeing machine, dehydrated, dried and shaped, and no auxiliary agents are used in the whole process;

[0050] The infrared shielding coating is prepared by mixing polyurethane and filler in a mass ratio of 20-30:70-80. The filler is nano-cesium-doped tungsten oxide. The coating thickness is 0.75mm.

[0051] Example 2

[0052] This embodiment discloses a method for preparing an infrared shielding composite coating fabric, comprising the following steps:

[0053] S1: Preparation of high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn;

[0054] The polyester POY yarn added with high-hygroscopic antibacterial masterbatch and ordinary polyester POY yarn are stretched to obtain high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn;

[0055] Among them, in the polyester POY yarn with added high hygroscopic antibacterial masterbatch, the addition amount of high hygroscopic antibacterial masterbatch is 25wt%; in the texturing operation, the deformation temperature in the first hot box is 175℃, the stretching ratio is 1.65, the main network pressure is 0.18Mpa, the heat setting temperature of the second hot box is 125℃, and the winding speed is 700m / min; the specification of high hygroscopic polyester DTY yarn is 75D / 72F, and the specification of ordinary polyester DTY yarn is low-elastic light mesh 75D / 24F.

[0056] S2: preparing double-sided fabric;

[0057] Highly hygroscopic polyester DTY yarn and ordinary polyester DTY yarn are woven into double-sided fabrics through a double-sided knitting machine;

[0058] The double-sided fabric includes a double-sided woven outer layer and an inner layer. The outer layer is woven with lower needles, and the inner layer is woven with upper needles. The upper and lower needles are arranged with low heel needles and high heel needles alternately. The high heel needles in the upper needles correspond to the low heel needles in the lower needles, and the low heel needles in the upper needles correspond to the high heel needles in the lower needles.

[0059] The outer and inner layers are knitted in four loops: the first loop is a high heel stitch in the lower needle and a tuck stitch in the upper needle; the second loop is a low heel stitch in the upper needle; the third loop is a low heel stitch in the lower needle and a tuck stitch in the upper needle; the fourth loop is a high heel stitch in the upper needle; the outer layer loop height is 1mm;

[0060] The outer layer is woven from the first and third routes, and the yarn used in the outer layer is highly hygroscopic polyester DTY yarn; the inner layer is woven from the second and fourth routes, and the yarn used in the inner layer is ordinary polyester DTY yarn;

[0061] The structure of double-faced fabric is double rib weave, and the front and back of the double-faced fabric have different effects;

[0062] S3: Preparation of infrared shielding composite coating fabric;

[0063] The double-sided fabric is deeply degreased, dyed, and shaped to obtain a polyester fabric, and an infrared shielding coating is applied to the inner layer side of the polyester fabric, and the coating is cured at 70° C. for 30 minutes to obtain an infrared shielding composite coating fabric;

[0064] Among them, deep degreasing includes ultrasonic treatment and desizing and refining;

[0065] The specific steps of ultrasonic treatment are as follows: the double-sided fabric is subjected to ultrasonic degreasing twice, the temperatures of the two ultrasonic degreasing times are 65℃ high-temperature hot water and room temperature water respectively, the ultrasonic frequency used in the two ultrasonic degreasing times is 30kHz, and the ultrasonic power is 0.7W / cm 2 After the treatment, the double-sided fabric is washed with water and the deep degreasing is obtained;

[0066] The specific steps of desizing and refining are as follows: 4% caustic soda, 4% polyester and the balance water are mixed to obtain a treatment solution, the fabric after deep degreasing is immersed in the treatment solution at a bath ratio of 1:20, and treated at a temperature of 125° C. for 85 minutes to obtain a double-sided fabric after desizing and refining;

[0067] The specific steps of dyeing and shaping are: the double-sided fabric after desizing and scouring is dyed through the dyeing machine, dehydrated, dried and shaped, and no auxiliary agents are used in the whole process;

[0068] The infrared shielding coating is prepared by mixing polyurethane and filler in a mass ratio of 25:75. The filler is nano-cesium-doped tungsten oxide, and the coating thickness is 0.75mm.

[0069] Example 3

[0070] This embodiment discloses a method for preparing an infrared shielding composite coating fabric, comprising the following steps:

[0071] S1: Preparation of high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn;

[0072] The polyester POY yarn added with high-hygroscopic antibacterial masterbatch and ordinary polyester POY yarn are stretched to obtain high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn;

[0073] Among them, in the polyester POY yarn with added high hygroscopic antibacterial masterbatch, the addition amount of high hygroscopic antibacterial masterbatch is 25wt%; in the texturing operation, the deformation temperature in the first hot box is 178°C, the stretching ratio is 1.68, the main network pressure is 0.20Mpa, the heat setting temperature of the second hot box is 130°C, and the winding speed is 700m / min; the specification of high hygroscopic polyester DTY yarn is 75D / 72F, and the specification of ordinary polyester DTY yarn is low-elastic light mesh 75D / 24F.

[0074] S2: preparing double-sided fabric;

[0075] Highly hygroscopic polyester DTY yarn and ordinary polyester DTY yarn are woven into double-sided fabrics through a double-sided knitting machine;

[0076] The double-sided fabric includes a double-sided woven outer layer and an inner layer. The outer layer is woven with lower needles, and the inner layer is woven with upper needles. The upper and lower needles are arranged with low heel needles and high heel needles alternately. The high heel needles in the upper needles correspond to the low heel needles in the lower needles, and the low heel needles in the upper needles correspond to the high heel needles in the lower needles.

[0077] The outer and inner layers are knitted in four loops: loop 1, loop 2, loop 3, and loop 4. The loop 1 is a high heel stitch on the lower needle and tucks in the high heel stitch on the upper needle. The loop 2 is a low heel stitch on the upper needle. The loop 3 is a low heel stitch on the lower needle and tucks in the low heel stitch on the upper needle. The loop 4 is a high heel stitch on the upper needle. The outer layer has a 1.2mm high heel stitch.

[0078] The outer layer is woven from the first and third routes, and the yarn used in the outer layer is highly hygroscopic polyester DTY yarn; the inner layer is woven from the second and fourth routes, and the yarn used in the inner layer is ordinary polyester DTY yarn;

[0079] The structure of double-faced fabric is double rib weave, and the front and back of the double-faced fabric have different effects;

[0080] S3: Preparation of infrared shielding composite coating fabric;

[0081] The double-sided fabric is deeply degreased, dyed, and shaped to obtain a polyester fabric, and an infrared shielding coating is applied to the inner layer side of the polyester fabric, and the coating is cured at 70° C. for 30 minutes to obtain an infrared shielding composite coating fabric;

[0082] Among them, deep degreasing includes ultrasonic treatment and desizing and refining;

[0083] The specific steps of ultrasonic treatment are as follows: the double-sided fabric is subjected to ultrasonic degreasing twice, the temperatures of the two ultrasonic degreasing times are 65℃ high-temperature hot water and room temperature water respectively, the ultrasonic frequency used in the two ultrasonic degreasing times is 30kHz, and the ultrasonic power is 0.6W / cm 2 After the treatment, the double-sided fabric is washed with water and the deep degreasing is obtained;

[0084] The specific steps of desizing and refining are as follows: 3% caustic soda, 3% polyester and the balance water are mixed to obtain a treatment solution, the fabric after deep degreasing is immersed in the treatment solution at a bath ratio of 1:20, and treated at a temperature of 120° C. for 90 minutes to obtain a double-sided fabric after desizing and refining;

[0085] The specific steps of dyeing and shaping are: the double-sided fabric after desizing and scouring is dyed through the dyeing machine, dehydrated, dried and shaped, and no auxiliary agents are used in the whole process;

[0086] The infrared shielding coating is prepared by mixing polyurethane and filler in a mass ratio of 30:70. The filler is nano-cesium-doped tungsten oxide, and the coating thickness is 0.75mm.

[0087] Comparative Example 1

[0088] The difference from Example 1 is that the high-hygroscopic polyester DTY yarn used in S1 and S2 is changed to ordinary polyester DTY yarn, and in S3, the fabric is finished with a hydrophilic additive after dyeing. The hydrophilic additive is a commercially available polyester hydrophilic finishing agent. Other parameters and conditions are the same as in Example 1.

[0089] The materials and equipment in the above embodiments and comparative examples are all commercially available products in the field.

[0090] Performance testing:

[0091] (1) The inner layer of the polyester fabrics prepared in the above Examples 1-3 and Comparative Example 1 was subjected to performance tests. The specific test results are shown in Table 1:

[0092] Table 1

[0093]

[0094] The tests of various indicators in Table 1 are based on the following standards: Hygroscopicity and quick-drying properties are measured with reference to GB / T 21655.1-2008 “Evaluation of moisture absorption and quick-drying properties of textiles - Part 1: Single item combination test method”.

[0095] According to the test results in Table 1, it can be seen that the moisture absorption and quick-drying properties of the fabrics prepared in Examples 1-3 are much better than those of the fabric prepared in Comparative Example 1, and the moisture absorption effect is relatively stable after washing. In summary, the present invention can significantly improve the moisture absorption of the fabric by selecting two polyester yarns with the same linear density as the yarn raw materials, adjusting the texturizing process, and combining a unique weaving structure design and process to weave a double-sided fabric, and then performing deep degreasing and not using auxiliaries throughout the process. This not only solves the shortcomings of the polyester fabric's poor moisture absorption effect and the problem of poor moisture absorption in later use, but also the preparation method of the present invention is easy to implement industrially, low in cost, and has a stable moisture absorption effect.

[0096] (2) The infrared shielding composite coating fabrics prepared in the above Examples 1-3 and Comparative Example 1 were subjected to performance tests. The specific test results are shown in Table 2:

[0097] Example 1 Example 2 Example 3 Comparative Example 1 Near infrared shielding rate (%) 80 82 85 80

[0098] The detection of each indicator in Table 2 is based on the following standards: The specific test method of the infrared shielding rate is as follows: in the near-infrared band of the solar spectrum within the range of 780nm-2500nm, the infrared spectrum transmittance of the embodiment and the comparative example is tested by Agilent Cary5000 UV-visible-infrared spectrophotometer, and the infrared blocking rate can be obtained after calculation;

[0099] According to the test results in Table 1, it can be seen that the composite coating fabric prepared by mixing polyurethane with filler nano-cesium-doped tungsten oxide to form an infrared shielding coating has an excellent infrared shielding effect.

[0100] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an infrared shielding composite coating fabric, characterized in that: The following steps are involved: S1: Preparation of high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn; The polyester POY yarn added with high-hygroscopic antibacterial masterbatch and ordinary polyester POY yarn are stretched to obtain high-hygroscopic polyester DTY yarn and ordinary polyester DTY yarn; S2: preparing double-sided fabric; Highly hygroscopic polyester DTY yarn and ordinary polyester DTY yarn are woven into double-sided fabrics through a double-sided knitting machine; S3: Preparation of infrared shielding composite coating fabric; The double-sided fabric is deeply degreased, dyed and shaped to obtain a polyester fabric, and an infrared shielding coating is coated on the inner layer side of the polyester fabric and cured to obtain an infrared shielding composite coating fabric.

2. The method for preparing an infrared shielding composite coating fabric according to claim 1, characterized in that: In the step S1: in the polyester POY yarn added with high hygroscopic antibacterial masterbatch, the addition amount of high hygroscopic antibacterial masterbatch is 25-30wt%; the linear density of high hygroscopic polyester DTY yarn and ordinary polyester DTY yarn is 75D.

3. The method for preparing an infrared shielding composite coating fabric according to claim 1, characterized in that: In step S1: in the texturing operation, the deformation temperature in the first hot box is 170-200°C, the stretching ratio is 1.40-1.80, the main network pressure is 0.12-0.25 MPa, the heat setting temperature of the second hot box is 50-170°C, and the winding speed is 300-1200 m / min.

4. The method for preparing an infrared shielding composite coating fabric according to claim 1, characterized in that: In step S2, the double-sided fabric comprises a double-sided woven outer layer and an inner layer, the outer layer is woven with lower needles, and the inner layer is woven with upper needles, the upper needles and the lower needles are arranged with low heel needles and high heel needles at intervals, the high heel needles in the upper needles correspond to the low heel needles in the lower needles, and the low heel needles in the upper needles correspond to the high heel needles in the lower needles; the outer layer and the inner layer are woven in a four-way loop of a first route, a second route, a third route, and a fourth route: the first route is a loop of a high heel needle in the lower needle and a tuck of a high heel needle in the upper needle; the third route is a loop of a high heel needle in the lower needle and a tuck of a high heel needle in the upper needle; the fourth .... The second loop is formed by the low heel stitch in the upper needle, the third loop is formed by the low heel stitch in the lower needle and the low heel stitch in the upper needle is tucked; the fourth loop is formed by the high heel stitch in the upper needle; the height of the outer layer loops is 0.8-2.0mm; the outer layer is knitted by the first and third loops, and the yarn used for the outer layer is highly hygroscopic polyester DTY yarn; the inner layer is knitted by the second and fourth loops, and the yarn used for the inner layer is ordinary polyester DTY yarn; the structure of the double-faced fabric is double rib structure, and the front and back effects of the double-face structure are different.

5. The method for preparing an infrared shielding composite coating fabric according to claim 1, characterized in that: In step S3, deep oil removal includes ultrasonic treatment and desizing and refining.

6. The method for preparing an infrared shielding composite coating fabric according to claim 1, characterized in that: In step S3, the specific steps of ultrasonic treatment are: the double-sided fabric is subjected to ultrasonic degreasing twice, the temperatures of the two ultrasonic degreasing times are 65°C hot water and room temperature water respectively, the ultrasonic frequency used in the two ultrasonic degreasing times is 30kHz, and the ultrasonic power is 0.3-1.0W / cm 2 After the treatment, the double-sided fabric is washed with water and the deep degreasing is obtained.

7. The method for preparing an infrared shielding composite coating fabric according to claim 1, characterized in that: In step S3, the specific steps of desizing and refining are as follows: 1-10% caustic soda, 1-6% polyester, and the balance water are mixed in percentage by mass to obtain a treatment liquid, the fabric after deep degreasing is immersed in the treatment liquid at a bath ratio of 1:20-30, and the treatment is carried out at a temperature of 100-125° C. for 65-90 minutes to obtain a double-sided fabric after desizing and refining.

8. The method for preparing an infrared shielding composite coating fabric according to claim 1, characterized in that: In step S3, the specific steps of dyeing and shaping are: dyeing the desized and refined double-sided fabric through a dyeing machine, dehydrating, drying, and shaping, and no auxiliary agent is used in the whole process.

9. The method for preparing an infrared shielding composite coating fabric according to claim 1, characterized in that: In step S3, the curing conditions are: curing at 70-100° C. for 30 minutes; the infrared shielding coating is prepared by mixing polyurethane and filler in a mass ratio of 20-30:70-80, the filler is nano-cesium-doped tungsten oxide, and the coating thickness is 0.5-0.75 mm.

10. An infrared shielding composite coating fabric prepared by the method for preparing an infrared shielding composite coating fabric according to any one of claims 1 to 9.

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