Ultrahigh hydrostatic pressure composite fabric and preparation method thereof

Abstract

The invention discloses an ultrahigh hydrostatic pressure composite fabric and a preparation method thereof, and relates to the technical field of functional fabrics. The method specifically comprises the following steps that 1, shell fabric and a high-water-pressure film are attached through a hot melt adhesive, and a composite fabric 1 is obtained; 2, calendering the woven fabric to form a middle layer, and sequentially laminating the middle layer, a reinforcing film layer and a base fabric from top to bottom by using a hot melt adhesive to obtain a composite fabric 2; 3, the composite fabric 1 and the composite fabric 2 are attached, and the ultrahigh hydrostatic pressure composite fabric is obtained; the structure of the ultrahigh hydrostatic pressure composite fabric sequentially comprises a shell fabric, a high hydraulic pressure film, a middle layer, a reinforced film layer and a base fabric from top to bottom, the fabric has an excellent hydrostatic pressure resistance function and can be used for diving equipment and outdoor sportswear and equipment.

Description

Technical Field

[0001] The invention relates to the technical field of functional fabrics, in particular to an ultra-high hydrostatic pressure composite fabric and a preparation method thereof. Background Art

[0002] As synthetic fibers, nylon and polyester have been widely used in outdoor sports equipment due to their excellent performance. In special outdoor sports scenarios such as diving, equipment needs to have good waterproof and pressure resistance. Nylon and polyester fabrics, due to their inherent characteristics, can provide basic material support for the preparation of ultra-high hydrostatic pressure composite fabrics. However, there is a growing demand in the market for fabrics that can effectively prevent water penetration in high hydrostatic pressure environments and have both comfort and durability. Despite relevant research, the development of an ultra-high hydrostatic pressure composite fabric and its preparation method that can meet the above requirements still has important practical significance and broad application prospects.

[0003] In summary, in order to solve the above problems, it is of great significance to provide an ultra-high hydrostatic pressure composite fabric and a preparation method thereof. Summary of the invention

[0004] The object of the present invention is to provide an ultra-high hydrostatic pressure composite fabric and a preparation method thereof, so as to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for preparing an ultra-high hydrostatic pressure composite fabric comprises the following steps:

[0007] Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1;

[0008] Step 2: Calender the woven fabric to form an intermediate layer, and sequentially bond the intermediate layer, the reinforcement film layer, and the base fabric from top to bottom using hot melt adhesive to obtain a composite fabric 2;

[0009] Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

[0010] Preferably, the surface fabric comprises ATY nylon woven fabric, the fiber line density of which is 40D-160D, the warp density is 60-75 strands / cm, and the weft density is 25-40 strands / cm;

[0011] The high water pressure film comprises a TPU high water pressure film or a PU high water pressure film, and the thickness thereof is 0.01 to 0.03 mm;

[0012] The woven fabric of the middle layer includes DTY polyester woven fabric, whose fiber linear density is 20D-160D, warp density is 50-120 strands / cm, and weft density is 25-90 strands / cm;

[0013] The base fabric comprises Tricot fabric, the fiber linear density of which is 20D to 35D, and the fiber comprises one of nylon and polyester;

[0014] The temperature of the hot melt adhesive bonding is 90-100°C.

[0015] Preferably, the reinforcement membrane layers are both high water pressure membranes.

[0016] Preferably, the reinforcing film layer is a polyurethane coating; the specific process of step 2 is: calendering the woven fabric to form an intermediate layer, pre-coating the lower surface of the intermediate layer with a polyurethane coating adhesive, drying and curing, to form a reinforcing film layer; using hot melt adhesive to bond the base fabric on this surface to obtain a composite fabric 2.

[0017] Preferably, the dry weight gain of the polyurethane coating is 10 to 40 g / m 2 The drying and curing process is as follows: first, drying in several ovens at 100°C to 160°C, each drying time being 60 to 90 seconds; then drying at 100 to 120°C for 6 to 8 hours.

[0018] Preferably, the preparation method of the polyurethane coating adhesive comprises the following steps: after mixing toluene and acetone, adding modified diatomaceous earth and ultrasonically dispersing them evenly, adding polyurethane, hydroxyethyl methacrylate, bis(3-mercaptopropionic acid)ethylene glycol, and azobisisobutyronitrile and stirring them evenly to obtain the polyurethane coating adhesive.

[0019] Preferably, the polyurethane coating adhesive comprises the following raw materials, in parts by mass: 7 to 8 parts of toluene, 3 to 4 parts of acetone, 1 to 2 parts of modified diatomaceous earth, 0.5 to 1 part of chitin whiskers, 70 to 80 parts of isocyanate-terminated polyurethane, 0.6 to 1 part of hydroxyethyl methacrylate, 0.2 to 0.4 parts of bis(3-mercaptopropionic acid)ethylene glycol, and 0.01 to 0.05 parts of azobisisobutyronitrile.

[0020] Preferably, the ultra-high hydrostatic pressure composite fabric prepared by the present invention comprises, from top to bottom, a surface fabric, a high hydrostatic pressure film, an intermediate layer, a reinforcement film layer, and a base fabric.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention adopts a lamination method to prepare an ultra-high hydrostatic pressure composite fabric, which has excellent high hydrostatic pressure anti-penetration ability and good wearing comfort, and can be applied to diving equipment, outdoor sportswear, etc.

[0023] The first layer of the present invention is the outermost layer of the composite fabric, which is made of ATY nylon woven fabric, has high strength and good wear resistance, can effectively resist external friction and physical damage, and provide basic protection; the second layer is a high water pressure membrane, which is made of TPU or PU high water pressure membrane to achieve high water pressure resistance of the fabric; the third layer is an intermediate layer, which is made of DTY polyester woven fabric, which has stronger bonding with the high water pressure membrane and the polyurethane coating; the fourth layer is a reinforcing membrane layer, which is made of the same high water pressure membrane or polyurethane coating as the second layer, and different types of reinforcing membrane layers can be selected according to needs to make different styles. The former is an ultra-high hydrostatic pressure style, which can further enhance the water pressure resistance of the fabric; the latter is a skin-friendly and lightweight style. The use of polyurethane coating can increase a certain degree of hydrostatic pressure resistance while increasing the weight of the fabric slightly, thereby ensuring the wearing comfort of the fabric; the fifth layer is a base fabric, which is made of nylon warp-knitted Tricot fabric, so that the fabric has no stickiness when in contact with the wearer's skin, and has good skin-friendliness and comfort.

[0024] (2) The polyurethane coating provided in the skin-friendly and lightweight version of the present invention in the enhanced film layer adopts a polyurethane coating glue, the main component of which is polyurethane. The coating is lighter than the high water pressure film and has a certain water pressure resistance. In the drying and curing process, the present invention introduces a small amount of hydroxyethyl methacrylate to carry out alkenyl termination on a part of the cyanate group, which can produce cross-linking, improve the curing efficiency, and the isocyanate group in the polyurethane can react with the hydroxyl group in the polyester to improve the binding property. In addition, the drying and curing method of the present invention adopts the method of gradually increasing the temperature for heat preservation, and then drying, which helps the solvent to gradually evaporate, thereby generating micropores, which can prevent the entry of water, but can allow water vapor to pass through, increasing the sweat absorption and air permeability. If the initial temperature is too high, the surface has been completely cured, and the solvent is not easy to evaporate, which may cause the micropores to merge, and even form cracks on the coating surface, so that the performance is reduced. The present invention also adds a small amount of modified diatomaceous earth to the polyurethane coating glue. Diatomaceous earth has a porous structure and a high specific surface area, which can significantly improve the air permeability and hygroscopicity of the coating, improve wearing comfort, and can also fill some excessively large harmful holes and increase hydrostatic pressure. If the modified diatomaceous earth is added in too much amount, the micropores will be blocked, reducing the water vapor permeability. The added chitosan whiskers can provide a certain antibacterial ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the laminated structure of the ultra-high hydrostatic pressure composite fabric of the present invention. DETAILED DESCRIPTION

[0026] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0027] It should be noted that the purchasers of all raw materials involved in the present invention are not subject to any special restrictions and exemplarily include: isocyanate-terminated polyurethane, SC7702, provided by Shanghai Juncai Material Technology Co., Ltd.; modified diatomaceous earth, particle size of 1 to 10 μm, provided by Shijiazhuang Taize Mineral Products Processing Co., Ltd.; chitosan whiskers, provided by Xi'an Qiyue Biotechnology Co., Ltd.; hydroxyethyl methacrylate, CAS No.: 868-77-9; bis(3-mercaptopropionic acid) glycol, 22504-50-3.

[0028] In the following examples, parts are parts by mass, and the raw materials mentioned above and used in the examples and comparative examples but not mentioned are all commercially available.

[0029] Depend on Figure 1 As shown, the composite fabric of the present invention comprises a surface fabric, a high water pressure membrane, an intermediate layer, a reinforcement membrane layer, and a base fabric from top to bottom.

[0030] Among them, in the following embodiments and comparative examples, the surface fabric is ATY nylon woven fabric, with a fiber line density of 75D, a warp density of 74 strands / cm, and a weft density of 26 strands / cm; the high water pressure membrane is a TPU high water pressure membrane with a thickness of 0.02 mm; the middle layer is a DTY polyester woven fabric, with a fiber line density of 75D, a warp density of 74 strands / cm, and a weft density of 26 strands / cm;

[0031] The laminating process is hot melt adhesive laminating, and the laminating temperature is 95°C.

[0032] Example 1: The preparation of the composite fabric comprises the following steps:

[0033] Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1;

[0034] Step 2: Calender the woven fabric to form an intermediate layer, and sequentially bond the intermediate layer, the reinforcement film layer, and the base fabric from top to bottom using hot melt adhesive to obtain a composite fabric 2;

[0035] Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

[0036] Wherein, the reinforcing film layer is a TPU high water pressure film with a thickness of 0.02 mm; and the base fabric is a 30d nylon 6 warp-knitted Tricot fabric.

[0037] Example 2: The preparation of the composite fabric comprises the following steps:

[0038] Step 1: Preparation of polyurethane coating adhesive:

[0039] 7.5 parts of toluene and 3.5 parts of acetone were mixed, and then 1.5 parts of modified diatomaceous earth and 0.5 parts of chitosan whiskers were added and ultrasonically dispersed uniformly, and then 75 parts of isocyanate-terminated polyurethane, 0.8 parts of hydroxyethyl methacrylate, 0.25 parts of bis(3-mercaptopropionic acid)ethylene glycol and 0.03 parts of azobisisobutyronitrile were added and stirred uniformly to obtain a polyurethane coating adhesive;

[0040] Step 2: Preparation of composite fabrics:

[0041] Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1;

[0042] Step 2: Calender the woven fabric to form an intermediate layer, pre-coat the lower surface of the intermediate layer with polyurethane coating glue, and sequentially dry it in nine ovens at 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 155°C, 160°C, and 165°C, with each drying time being 80 seconds; then dry it at 110°C for 8 hours to form a reinforced film layer with a dry weight gain of 20g / m 2 ; Using hot melt adhesive to bond the base fabric on this surface to obtain a composite fabric 2;

[0043] Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

[0044] Wherein, the base fabric is 30d nylon 66 warp knitted Tricot fabric.

[0045] Example 3: The preparation of the composite fabric comprises the following steps:

[0046] Step 1: Preparation of polyurethane coating adhesive:

[0047] 7.5 parts of toluene and 3.5 parts of acetone were mixed, and then 1.5 parts of modified diatomaceous earth and 0.5 parts of chitosan whiskers were added and ultrasonically dispersed uniformly, and then 75 parts of isocyanate-terminated polyurethane, 0.8 parts of hydroxyethyl methacrylate, 0.25 parts of bis(3-mercaptopropionic acid)ethylene glycol and 0.03 parts of azobisisobutyronitrile were added and stirred uniformly to obtain a polyurethane coating adhesive;

[0048] Step 2: Preparation of composite fabrics:

[0049] Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1;

[0050] Step 2: Calender the woven fabric to form an intermediate layer, pre-coat the lower surface of the intermediate layer with polyurethane coating glue, and sequentially dry it in nine ovens at 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 155°C, 160°C, and 165°C, with each drying time being 70 seconds; then dry it at 100°C for 8 hours to form a reinforced film layer with a dry weight gain of 20g / m2 ; Using hot melt adhesive to bond the base fabric on this surface to obtain a composite fabric 2;

[0051] Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

[0052] Wherein, the base fabric is 30d nylon 66 warp knitted Tricot fabric.

[0053] Example 4: The preparation of the composite fabric comprises the following steps:

[0054] Step 1: Preparation of polyurethane coating adhesive:

[0055] 7.5 parts of toluene and 3.5 parts of acetone were mixed, and then 1.5 parts of modified diatomaceous earth and 0.5 parts of chitosan whiskers were added and ultrasonically dispersed uniformly, and then 75 parts of isocyanate-terminated polyurethane, 0.8 parts of hydroxyethyl methacrylate, 0.25 parts of bis(3-mercaptopropionic acid)ethylene glycol and 0.03 parts of azobisisobutyronitrile were added and stirred uniformly to obtain a polyurethane coating adhesive;

[0056] Step 2: Preparation of composite fabrics:

[0057] Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1;

[0058] Step 2: Calender the woven fabric to form an intermediate layer, pre-coat the lower surface of the intermediate layer with polyurethane coating glue, and sequentially dry it in nine ovens at 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 155°C, 160°C, and 165°C, with each drying time being 90 seconds; then dry it at 120°C for 6 hours to form a reinforced film layer with a dry weight gain of 20g / m 2 ; Using hot melt adhesive to bond the base fabric on this surface to obtain a composite fabric 2;

[0059] Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

[0060] Comparative Example 1: Based on Example 2, modified diatomaceous earth is not added, and the rest of the process remains unchanged, as follows: Step 1: Preparation of polyurethane coating adhesive:

[0061] 7.5 parts of toluene and 3.5 parts of acetone were mixed, 0.5 parts of chitosan whiskers were added and ultrasonically dispersed uniformly, 75 parts of isocyanate-terminated polyurethane, 0.8 parts of hydroxyethyl methacrylate, 0.25 parts of bis(3-mercaptopropionic acid)ethylene glycol, and 0.03 parts of azobisisobutyronitrile were added and stirred uniformly to obtain a polyurethane coating adhesive;

[0062] Step 2: Preparation of composite fabrics:

[0063] Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1;

[0064] Step 2: Calender the woven fabric to form an intermediate layer, pre-coat the lower surface of the intermediate layer with polyurethane coating glue, and sequentially dry it in nine ovens at 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 155°C, 160°C, and 165°C, with each drying time being 80 seconds; then dry it at 110°C for 8 hours to form a reinforced film layer with a dry weight gain of 20g / m 2 ; Using hot melt adhesive to bond the base fabric on this surface to obtain a composite fabric 2;

[0065] Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

[0066] Wherein, the base fabric is 30d nylon 66 warp knitted Tricot fabric.

[0067] Comparative Example 2: Based on Example 2, the amount of modified diatomaceous earth added was increased, and the other processes remained unchanged, as follows: Step 1: Preparation of polyurethane coating adhesive:

[0068] 7.5 parts of toluene and 3.5 parts of acetone were mixed, 3 parts of modified diatomaceous earth and 0.5 parts of chitosan whiskers were added and ultrasonically dispersed uniformly, 75 parts of isocyanate-terminated polyurethane, 0.8 parts of hydroxyethyl methacrylate, 0.25 parts of bis(3-mercaptopropionic acid)ethylene glycol and 0.03 parts of azobisisobutyronitrile were added and stirred uniformly to obtain a polyurethane coating adhesive;

[0069] Step 2: Preparation of composite fabrics:

[0070] Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1;

[0071] Step 2: Calender the woven fabric to form an intermediate layer, pre-coat the lower surface of the intermediate layer with polyurethane coating glue, and sequentially dry it in nine ovens at 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 155°C, 160°C, and 165°C, with each drying time being 80 seconds; then dry it at 110°C for 8 hours to form a reinforced film layer with a dry weight gain of 20g / m 2 ; Using hot melt adhesive to bond the base fabric on this surface to obtain a composite fabric 2;

[0072] Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

[0073] Wherein, the base fabric is 30d nylon 66 warp knitted Tricot fabric.

[0074] Comparative Example 3: Based on Example 2, a fixed temperature is used when drying the dry coating, and the other processes remain unchanged, as follows: Step 1: Preparation of polyurethane coating glue:

[0075] 7.5 parts of toluene and 3.5 parts of acetone were mixed, and then 1.5 parts of modified diatomaceous earth and 0.5 parts of chitosan whiskers were added and ultrasonically dispersed uniformly, and then 75 parts of isocyanate-terminated polyurethane, 0.8 parts of hydroxyethyl methacrylate, 0.25 parts of bis(3-mercaptopropionic acid)ethylene glycol and 0.03 parts of azobisisobutyronitrile were added and stirred uniformly to obtain a polyurethane coating adhesive;

[0076] Step 2: Preparation of composite fabrics:

[0077] Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1;

[0078] Step 2: Calender the woven fabric to form an intermediate layer, pre-coat the lower surface of the intermediate layer with polyurethane coating glue, and sequentially pass through a total of nine 160°C ovens for drying, each drying time is 80 seconds; then dry at 110°C for 8 hours to form a reinforcement film layer with a dry weight gain of 20g / m 2 ; Using hot melt adhesive to bond the base fabric on this surface to obtain a composite fabric 2;

[0079] Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

[0080] Wherein, the base fabric is 30d nylon 66 warp knitted Tricot fabric.

[0081] Performance test: (1) According to GB / T 4744-2013, hydrostatic pressure test was performed on Example 1 and Example 2, with the value in mmH 2 O meter, the experimental data are shown in Table 1; (2) According to GB / T 31402-2015, the antibacterial rate of Example 2 was tested, and the fungus was selected as Escherichia coli. The experimental data are shown in Table 1; (3) According to GB / T 12704.1-2009, the water vapor transmission rate of Examples 1 to 4 and Comparative Examples 1 to 3 was tested, and the experimental data are shown in Table 2

[0082] Table 1

[0083]

[0084] Table 2

[0085]

[0086] Conclusion: As can be seen from Table 1, Example 1 of the present invention is an ultra-high hydrostatic pressure model with strong water pressure resistance, but the water vapor permeability is relatively low, and the wearing comfort is not as good as Example 2, and it can be used for diving equipment; Example 2 is a skin-friendly and lightweight model with high water vapor permeability, comfortable to wear, and slightly reduced water pressure resistance, but still more than 30,000, and has an antibacterial effect, and can be used for outdoor sportswear and equipment; As can be seen from Table 2. In Comparative Example 1, no modified diatomaceous earth is added, and the water vapor permeability decreases; in Comparative Example 2, the content of modified diatomaceous earth is increased, and due to the excessive amount of addition, the micropores are blocked, the water vapor permeability is reduced, and the water vapor permeability is reduced; in Comparative Example 3, a fixed temperature is used when drying the dry coating, and the initial temperature is too high, the surface is easy to be completely cured first, the solvent is not easy to evaporate, the micropores merge, and cracks appear on the surface, so it has no practical significance.

[0087] In summary, the present invention successfully provides an ultra-high hydrostatic pressure composite fabric and a preparation method thereof by designing two composite fabric styles. The ultra-high hydrostatic pressure style has excellent water pressure resistance, and the skin-friendly and lightweight style has good water pressure resistance, as well as excellent moisture permeability and antibacterial properties.

[0088] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing an ultra-high hydrostatic pressure composite fabric, characterized in that: The following steps are involved: Step 1: The surface fabric and the high water pressure film are bonded together using hot melt adhesive to obtain a composite fabric 1; Step 2: Calender the woven fabric to form an intermediate layer, and sequentially bond the intermediate layer, the reinforcement film layer, and the base fabric from top to bottom using hot melt adhesive to obtain a composite fabric 2; Step 3: Bond the composite fabric 1 and the composite fabric 2 to obtain an ultra-high hydrostatic pressure composite fabric.

2. The method for preparing an ultra-high hydrostatic pressure composite fabric according to claim 1, characterized in that: The surface fabric comprises ATY nylon woven fabric, the fiber line density of which is 40D-160D, the warp density is 60-75 strands / cm, and the weft density is 25-40 strands / cm; The high water pressure film includes a TPU high water pressure film or a PU high water pressure film, and the thickness thereof is 0.01 to 0.03 mm; The woven fabric of the middle layer includes DTY polyester woven fabric, whose fiber linear density is 20D-160D, warp density is 50-120 strands / cm, and weft density is 25-90 strands / cm; The base fabric comprises Tricot fabric, the fiber linear density of which is 20D to 35D, and the fiber comprises one of nylon and polyester; The temperature of the hot melt adhesive bonding is 90-100°C.

3. The method for preparing an ultra-high hydrostatic pressure composite fabric according to claim 2, characterized in that: The enhanced membrane layer is also a high water pressure membrane.

4. The method for preparing an ultra-high hydrostatic pressure composite fabric according to claim 2, characterized in that: The reinforcing film layer is a polyurethane coating; the specific process of step 2 is: calendering the woven fabric to form an intermediate layer, pre-coating the lower surface of the intermediate layer with a polyurethane coating adhesive, drying and curing, to form a reinforcing film layer; using hot melt adhesive to bond the base fabric on this surface to obtain a composite fabric 2.

5. The method for preparing an ultra-high hydrostatic pressure composite fabric according to claim 4, characterized in that: The dry weight gain of the polyurethane coating is 10 to 40 g / m 2 The drying and curing process is as follows: first, drying in several ovens at 100°C to 160°C, each drying time being 60 to 90 seconds; then drying at 100 to 120°C for 6 to 8 hours.

6. The method for preparing an ultra-high hydrostatic pressure composite fabric according to claim 4, characterized in that: The preparation method of the polyurethane coating adhesive comprises the following steps: mixing toluene and acetone, adding modified diatomaceous earth for uniform ultrasonic dispersion, adding polyurethane, hydroxyethyl methacrylate, bis(3-mercaptopropionic acid)ethylene glycol and azobisisobutyronitrile for uniform stirring to obtain the polyurethane coating adhesive.

7. The method for preparing an ultra-high hydrostatic pressure composite fabric according to claim 6, characterized in that: The polyurethane coating adhesive comprises the following raw materials, calculated by mass: 7 to 8 parts of toluene, 3 to 4 parts of acetone, 1 to 2 parts of modified diatomaceous earth, 0.5 to 1 part of chitin whiskers, 70 to 80 parts of isocyanate-terminated polyurethane, 0.6 to 1 part of hydroxyethyl methacrylate, 0.2 to 0.4 parts of bis(3-mercaptopropionic acid)ethylene glycol, and 0.01 to 0.05 parts of azobisisobutyronitrile.

8. The ultra-high hydrostatic pressure composite fabric prepared according to the method for preparing an ultra-high hydrostatic pressure composite fabric according to any one of claims 1 to 7.

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