Flame-retardant fabric and preparation method thereof

Abstract

The invention discloses a flame-retardant fabric and a preparation method thereof, the flame-retardant fabric comprises aramid fiber, polyimide fiber, silicon-oxygen bond modified resin, aluminum hypophosphite, magnesium borate, hollow alumina, zinc borate and nano clay, through the arrangement of the materials, the flame-retardant efficiency of the fabric can be improved, the environmental protection safety can be enhanced, and the use durability can be broken through; the flame-retardant fabric not only has the efficient flame-retardant characteristic, but also has the excellent service life, when the flame-retardant coating is prepared, rapid cutting and emulsifying preparation of the coating is achieved by using the dispersing and emulsifying machine, and a movable lifting device is further arranged in the dispersing and emulsifying machine to meet elliptical movement and up-down reciprocating movement of a stirring position, so that the flame-retardant effect is improved. The cutting and emulsifying efficiency of the impeller and the emulsifying head in the equipment on the material is obviously enhanced, and the uniformity of the coating structure of the flame-retardant fabric and the auxiliary improvement of the production efficiency are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of flame retardant fabrics, in particular to a flame retardant fabric and a preparation method thereof. Background Art

[0002] With the advancement of modern science and technology and the improvement of people's living standards, people have higher and higher functional requirements for clothing fabrics. Especially for workers in firefighting, petrochemical, metallurgical casting, electric power and other industries who are in high-temperature working environments for a long time, flame retardant and fireproof clothing is an important layer of skin related to life safety. This layer of "skin" not only isolates the human body from the fire source in a short period of time, but also replaces the human skin to withstand the high temperature of the fire for a relatively long time. Therefore, flame retardant and fireproof clothing plays a vital protective role in the life safety of workers.

[0003] In the current preparation process of flame-retardant fabrics, various processes are generally used to apply a flame-retardant coating on the surface of the fabric, so that the pores on the fabric surface are sealed or reduced to a certain extent by the coating agent, thereby obtaining flame retardancy. However, the flame-retardant coating applied today has a short durability and is easily removed after several washes, thereby significantly reducing the flame retardancy of the fabric.

[0004] Secondly, when preparing the flame retardant coating required for flame retardant fabrics, a dispersing emulsifier is generally required to achieve stirring and emulsification of the material to make the fineness of the material evenly distributed. However, the stirring rod of the existing emulsifier is generally fixed and lacks certain adjustment functions. The stirring rod can only work at a fixed position. As a result, the stirring effect of the material is less efficient, resulting in poor dispersion of the material. Summary of the Invention

[0005] The object of the present invention is to provide a flame retardant fabric and a preparation method thereof to solve the problems raised in the above background technology.

[0006] In a first aspect, the present application provides a flame retardant fabric and a preparation method thereof, comprising a base fabric layer, a flame retardant coating and auxiliary components; The base fabric layer comprises aramid and polyimide fibers; The flame retardant coating comprises a base resin and a main flame retardant; Wherein, the matrix resin comprises one or more of waterborne polyurethane, acrylic resin and silanol-modified vinyl ester copolymer; The main flame retardant includes one or more of aluminum hypophosphite, magnesium borate nanosheets and phosphorus-nitrogen synergistic intumescent flame retardant; The auxiliary components include one or more of zinc borate, nanoclay, hollow alumina microspheres and hyperbranched polyaniline.

[0007] In a second aspect, the present application provides a method for preparing a flame retardant fabric, comprising the following steps: S1. Base fabric pretreatment: Aramid and polyimide fibers are processed into base fabrics through cotton cleaning, carding, spinning, and weaving. The base fabrics are placed in a vacuum chamber, and argon gas is introduced and radio frequency power is applied to etch the surface of the base fabrics. S2. Preparation of flame retardant coating: adding the flame retardant coating components sequentially into a dispersing emulsifier to uniformly emulsify the flame retardant coating; S3. Coating and curing: The prepared base fabric is input into a double-sided roller coater for double-sided flame retardant coating. The coated base fabric is transferred to a segmented hot air oven for multi-stage drying to complete the preparation of the flame retardant fabric.

[0008] Preferably, in step S1, aramid fiber (50-70%) and polyimide fiber (30-50%) are blended and woven.

[0009] Preferably, the specific steps of step S2 are: S21: Mix the silicon-oxygen bond-modified vinyl ester resin with deionized water in a ratio of 1:3 and pre-disperse for 5-10 minutes; S21: Add aluminum hypophosphite, magnesium borate nanosheets, and hollow alumina microspheres in sequence and disperse at high speed for 20-30 minutes; S21: Finally, add zinc borate and nanoclay, stir at low speed (400-500 rpm) to defoam for 5-10 minutes.

[0010] Preferably, the specific steps of the segmented hot air drying oven in step S3 are: S31, pre-curing: 70-80℃ pre-curing for 10-20min; S32, high temperature curing: 130-150℃ high temperature crosslinking for 40-50min; S33, hot pressing curing: hot pressing roller densification at 170-180℃ for 20-30s.

[0011] Preferably, the dispersing emulsifier used in step S2 includes a base, a metal tube is inserted into the right side of the upper end of the base, and a control panel is docked at the upper end of the metal tube, a support shell is fixedly provided in the middle of the upper end of the base, a cylinder is installed inside the support shell, the upper end of the cylinder is connected to the receiving plate, both sides of the receiving plate are plugged with the guide rod, and the bottom of the guide rod is fixedly connected to the outer side of the support shell, a movable lifting device is provided at the upper end of the receiving plate, and the front side of the movable lifting device is connected to the top of the motor, a flange is installed at the bottom of the motor, support rods are provided on both sides of the bottom of the flange, the bottom output end of the motor is connected to the central shaft, an impeller is installed in the middle of the central shaft, and an emulsifying head is provided at the bottom of the central shaft, and the emulsifying head is connected to the bottom of the support rods on both sides, and a barrel is placed inside the front side of the base.

[0012] Preferably, the mobile lifting device includes a support plate, which is connected to the front side of the upper end of the support shell, and a bracket is fixedly connected to the outside of the upper end of the support shell. A servo motor is installed on the front side of the upper end of the bracket, and the bottom output end of the servo motor is connected to the moving component, the front side of the moving component is connected to the upper end of the motor, the upper end of the moving component is connected to the lifting component, and the bottom of the lifting component is connected to the receiving plate.

[0013] Preferably, the moving assembly includes a rotating shaft, which is connected to the lower end of the servo motor, and a gear is provided on the outer side of the lower end of the rotating shaft. The outer side of the gear is connected to the column, and the column is inserted into the upper end of the fixed plate, and the bottom of the fixed plate is fixedly connected to the movable plate. A connecting frame is fixedly provided on the upper end of the movable plate, and the connecting frame is installed on the outer side of the fixed plate. The front side of the movable plate is fixedly connected to the docking plate, and the front side of the docking plate is locked with the upper end of the motor by bolts. A limiting rod is inserted into the docking plate, and both sides of the limiting rod are plugged into the guide frame. The bottom of the guide frame is fixedly connected to a horizontal bar, and the horizontal bar is slidably embedded in the inside of the limiting guide plate, and the limiting guide plate is fixed on the front side of the support plate.

[0014] Preferably, the lifting assembly includes a driving wheel, which is connected to the outer side of the upper end of the rotating shaft, and the driving wheel is externally transmitted with a belt, one side of the belt is connected to the driven wheel, and the middle of the driven wheel is connected with a rotating rod, and the lower end of the rotating rod is connected to the rotating drum, and the outer sleeve of the rotating drum is provided with a connecting clamp, one side of the connecting clamp is plugged with a pin shaft, and the inner side of the pin shaft is inserted into the transmission groove, and the transmission groove is opened on the outside of the rotating drum, and the bottom of the rotating drum is rotatably connected to the connecting seat, the front side of the connecting clamp is fixedly connected to the lifting plate, and the front side of the connecting seat is fixedly connected to the supporting shell, the lifting plate is movably inserted into the supporting shell, and the upper end of the lifting plate is connected to the bottom of the support plate, and the bottom of the supporting shell is connected to the upper end of the supporting plate.

[0015] Preferably, there is a distance between the fixing plate and the connecting frame, and the distance between the fixing plate and the connecting frame is arranged in an elliptical guide groove shape as a whole.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This application arranges aramid, polyimide fiber, silicone bond modified resin, aluminum hypophosphite, magnesium borate, hollow alumina, zinc borate and nanoclay to achieve the improvement of flame retardant efficiency of fabrics, the enhancement of environmental protection safety and the breakthrough of durability of use, so that the flame retardant fabric not only has high-efficiency flame retardant properties, but also has an excellent service life. In the preparation of flame retardant coating, a dispersing emulsifier is used to achieve rapid cutting and emulsification preparation of the coating, and a mobile lifting device is also provided inside the dispersing emulsifier to meet the elliptical movement and up and down reciprocating movement of the stirring position, so that the impeller and emulsifying head inside the equipment can significantly enhance the cutting and emulsification efficiency of the material, thereby ensuring the uniformity of the coating structure of the flame retardant fabric and auxiliary improvement of production efficiency.

[0017] The setting of the moving component, that is, when the servo motor realizes the rotation of the rotating shaft, the gear connected to the lower end of the rotating shaft can be transmitted to multiple columns equidistantly arranged at the upper end of the fixed plate. At the same time, the elliptical guide groove formed between the fixed plate and the connecting frame can make the moving plate move with the transmission to realize the front and rear reciprocating movement and left and right movement at the same time. When the moving plate moves back and forth, the guide frame connected to the outside of the moving plate can realize synchronous left and right reciprocating movement through the limiting guide of the horizontal bar and the limiting guide plate. In this way, combined with the reciprocating movement effect of the two, the docking plate fixed on the front side of the moving plate can realize the elliptical movement of the motor connected to the front side. In this way, the impeller and emulsifying head extending into the interior of the barrel and in a rapidly rotating cutting state can move elliptically accordingly to expand their stirring range and accelerate the quality and efficiency of material emulsification.

[0018] The setting of the lifting component, that is, when the rotating shaft rotates, the rotation of the externally connected driving wheel can also be realized, and the driving wheel can realize the synchronous rotation of the driven wheel through the belt transmission, so that the rotating rod connected to the middle of the driven wheel can realize the rotation of the rotating drum connected to the bottom, and when the rotating drum rotates, the pin connected to the transmission groove opened on the outside of the rotating drum can drive the connecting clamp to move back and forth along the outside of the rotating drum in combination with the rotation effect of the transmission groove. In this way, the lifting plate and the supporting shell in the telescopic combination state can realize reciprocating telescopic activities, thereby assisting the up and down reciprocating movement of the support plate, so that the impeller and the emulsifying head extending into the inside of the barrel can be stirred up and down synchronously, and at the same time, it can be synchronized with the elliptical movement process to further enhance its stirring range, so that the efficiency and quality of the emulsified preparation of the flame retardant coating are further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the preparation process of the flame-retardant fabric of the present invention.

[0020] Figure 2 This is a schematic diagram of the process for preparing the flame retardant coating of the present invention.

[0021] Figure 3 Schematic diagram of the coating and curing process of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the dispersing and emulsifying machine of the present invention.

[0023] Figure 5 This is a schematic diagram of the combined structure of the mobile lifting device and the motor of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the mobile lifting device of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the mobile component of the present invention.

[0026] Figure 8 This is a schematic diagram of the split structure of the mobile component of the present invention.

[0027] Figure 9 It is a schematic diagram of the three-dimensional structure of the lifting assembly of the present invention.

[0028] Figure 10 This is a schematic diagram of the disassembled structure of the three-dimensional part of the lifting assembly of the present invention.

[0029] Figure: Base 1, Metal Tube 2, Control Panel 3, Support Shell 4, Cylinder 5, Adapter Plate 6, Guide Rod 7, Mobile Lifting Device 8, Support Plate 81, Bracket 82, Servo Motor 83, Mobile Assembly 84, Rotating Shaft 841, Gear 842, Column 843, Fixed Plate 844, Connecting Frame 845, Mobile Plate 846, Docking Plate 847, Limiting Rod 848, Guide Frame 849, Horizontal Bar 8 410, limiting guide plate 8411, lifting assembly 85, driving pulley 851, belt 852, driven pulley 853, rotating rod 854, rotating drum 855, connecting clamp 856, pin 857, transmission groove 858, connecting seat 859, lifting plate 8510, supporting shell 8511, motor 9, flange 10, support rod 11, center shaft 12, impeller 13, emulsifying head 14, barrel 15. DETAILED DESCRIPTION

[0030] In order to further explain the technical solution of the present invention, specific embodiments are described in detail below.

[0031] See also Figure 1-3 The present invention provides a flame retardant fabric and a preparation method thereof, comprising a base fabric layer, a flame retardant coating and auxiliary components; The base fabric layer includes aramid and polyimide fibers. Aramid is an aromatic polyamide fiber, and its high molecular structure gives it inherent flame retardancy. When exposed to fire, it will not melt and drip, but will quickly carbonize to form an insulating layer, effectively interrupting the combustion chain. The decomposition temperature can reach above 400°C. During combustion, the smoke concentration is low and no toxic gas is released. At the same time, the flame retardant performance is not affected by the number of times it is washed, making it a permanent flame retardant fiber. Polyimide fiber has the property of self-extinguishing when away from fire. It does not produce melt droplets when burned, avoiding the risk of secondary burns. The aromatic imide ring in its molecular structure forms a stable carbonized layer at high temperatures, effectively isolating oxygen and delaying the spread of flames. At the same time, the high decomposition temperature (>500°C) and high temperature resistance (long-term use temperature up to 300°C) of polyimide fiber itself enable it to maintain its flame retardant effect in extreme environments. Blending with aramid not only retains flame retardancy but also improves the moisture absorption, breathability and softness of the fabric. The flame retardant coating comprises a base resin and a main flame retardant; Wherein, the matrix resin comprises one or more of waterborne polyurethane, acrylic resin and silanol-modified vinyl ester copolymer; The main flame retardant includes one or more of aluminum hypophosphite, magnesium borate nanosheets and phosphorus-nitrogen synergistic intumescent flame retardant; The auxiliary components include one or more of zinc borate, nanoclay, hollow alumina microspheres and hyperbranched polyaniline.

[0032] On the other hand, the present application provides a method for preparing a flame retardant fabric, comprising the following steps: S1. Base fabric pretreatment: Aramid and polyimide fibers are processed into base fabrics through cotton cleaning, carding, spinning, and weaving. The base fabrics are placed in a vacuum chamber, and argon gas is introduced and radio frequency power is applied to etch the surface of the base fabrics. S2. Preparation of flame retardant coating: adding the flame retardant coating components sequentially into a dispersing emulsifier to uniformly emulsify the flame retardant coating; S3. Coating and curing: The prepared base fabric is input into a double-sided roller coater for double-sided flame retardant coating. The coated base fabric is transferred to a segmented hot air oven for multi-stage drying to complete the preparation of the flame retardant fabric.

[0033] Wherein, in step S1, aramid fiber (50-70%) and polyimide fiber (30-50%) are blended and woven.

[0034] Wherein, the specific steps of step S2 are: S21: Mix the silicon-oxygen bond-modified vinyl ester resin with deionized water in a ratio of 1:3 and pre-disperse for 5-10 minutes; S21: Add aluminum hypophosphite, magnesium borate nanosheets, and hollow alumina microspheres in sequence and disperse at high speed for 20-30 minutes; S21: Finally, add zinc borate and nanoclay, stir at low speed (400-500 rpm) to defoam for 5-10 minutes.

[0035] Preferably, the specific steps of the segmented hot air drying oven in step S3 are: S31, pre-curing: 70-80℃ pre-curing for 10-20min; S32, high temperature curing: 130-150℃ high temperature crosslinking for 40-50min; S33, hot pressing curing: hot pressing roller densification at 170-180℃ for 20-30s. Example

[0036] S1. Fabric pretreatment: Aramid and polyimide fibers are cleaned, combed, and blended in a ratio of (70:30). The resulting fabric is placed in a vacuum chamber, and argon gas is introduced and radio frequency power is applied to etch the fabric surface. S2. Preparation of flame retardant coating: 50 wt% of silane modified resin, 10 wt% of aluminum hypophosphite, 6 wt% of magnesium borate, 6 wt% of hollow alumina, 4 wt% of zinc borate, and 5 wt% of nanoclay were added into a dispersing emulsifier to uniformly emulsify the flame retardant coating; S3. Coating and curing: The prepared base fabric is fed into a double-sided roller coater for double-sided flame retardant coating. The coated base fabric is then transferred to a segmented hot air oven for multi-stage drying to complete the preparation of the flame retardant fabric. The experimental comparative data obtained are as follows. Table 1 Comparison of properties of this application and traditional flame retardant fabrics In the flame retardant performance test, the fabric prepared by the present invention showed significant advantages over the commercially available halogen-free flame retardant fabric: Improved flame retardancy: Through the Limiting Oxygen Index (LOI) test, the LOI value of the present invention reaches 34% or higher (commercially available products are generally 28% to 30%), indicating that it is more difficult to ignite in air. In the vertical burning test, the damaged length of the fabric is controlled at 70mm or less (commercially available products are generally 100mm or higher), effectively reducing the risk of combustion spread.

[0037] Enhanced environmental safety: The results of the combustion smoke density test (SDR) show that the smoke density of the present invention is less than 40, which is more than 50% lower than that of commercially available products (SDR ≥ 80). No halogen gas is released during combustion (some commercially available products still contain trace halogen residues), complying with the strict REACH regulations and national standard A-level fire protection requirements.

[0038] A breakthrough in durability: After 50 standard washes, the LOI retention rate of this invention exceeds 90% (commercially available products typically have a LOI retention rate of ≤75%), and the coating maintains a 4B adhesion level (commercially available products typically have a ≤3B level). This addresses the core issues of traditional flame-retardant coatings, such as easy flaking and poor washability. In summary, this invention surpasses commercially available flame-retardant fabrics in flame retardancy, environmental friendliness, and longevity, providing a superior solution for flame-retardant fabric protection.

[0039] See also Figure 4 The dispersing and emulsifying machine used in the step S2 includes a base 1, a metal tube 2 is inserted into the right side of the upper end of the base 1, and a control panel 3 is docked at the upper end of the metal tube 2. A support shell 4 is fixedly provided in the middle of the upper end of the base 1, and a cylinder 5 is installed inside the support shell 4. The upper end of the cylinder 5 is connected to the receiving plate 6, and both sides of the receiving plate 6 are plugged with the guide rod 7, and the bottom of the guide rod 7 is fixedly connected to the outer side of the support shell 4. A movable lifting device 8 is provided on the upper end of the receiving plate 6, and the front side of the movable lifting device 8 is connected to the top of the motor 9. A flange 10 is installed at the bottom of the motor 9, and support rods 11 are provided on both sides of the bottom of the flange 10. The output end of the bottom of the motor 9 is connected to the central shaft 12, and an impeller 13 is installed in the middle of the central shaft 12, and an emulsifying head 14 is provided at the bottom of the central shaft 12, and the emulsifying head 14 is connected to the bottom of the support rods 11 on both sides. A barrel 15 is placed inside the front side of the base 1.

[0040] Specifically, when the emulsification preparation of the flame retardant coating is to be carried out, the raw materials constituting the flame retardant coating can be put into the barrel 15 in proportion. At this time, the operation of the cylinder 5 provided inside the support shell 4 is realized through the control panel 3. In this way, the cylinder 5 can realize the downward movement of the upper end connecting plate 6, and the downward moving connecting plate 6 can cooperate with the plug-in guide of the guide rods 7 provided on the left and right sides to realize stable downward movement. In this way, the support rod 11, the central shaft 12, the impeller 13 and the emulsifying head 14 installed at the lower end of the motor 9 can be moved into the barrel 15. At this time, driving the motor 9 can make the central shaft 12 realize the rotation of the impeller 13 and the emulsifying head 14 to quickly realize the cutting and emulsification of the raw materials inside the barrel 15, so as to achieve the emulsification preparation of the flame retardant coating, ensure the quality of subsequent coating, and realize the efficient preparation of flame retardant fabrics.

[0041] See also Figure 5-6 The mobile lifting device 8 includes a support plate 81, which is connected to the front side of the upper end of the support shell 4, and the two sides of the rear end of the support plate 81 are slidingly connected to the two sides of the front end of the support shell 4. The upper end of the support shell 4 is fixedly connected to the outside of the upper end of the support shell 4. A servo motor 83 is installed on the front side of the upper end of the bracket 82. The bottom output end of the servo motor 83 is connected to the moving component 84, the front side of the moving component 84 is connected to the upper end of the motor 9, the upper end of the moving component 84 is connected to the lifting component 85, and the bottom of the lifting component 85 is connected to the receiving plate 6.

[0042] See also Figure 7-8 The moving assembly 84 includes a rotating shaft 841, which is vertically connected to the lower end of the servo motor 83. A gear 842 is installed on the outer side of the lower end of the rotating shaft 841. The outer side of the gear 842 is connected to the column 843. The column 843 is equidistantly inserted into the upper end of the fixed plate 844, and the bottom of the fixed plate 844 is fixedly connected to the moving plate 846, and the number of columns 843 is not less than five. A connecting frame 845 is fixed on the upper end of the moving plate 846, and the connecting frame 845 is relatively installed on the outer side of the fixed plate 844. The front side of the moving plate 846 is longitudinally fixedly connected with a docking plate 847, and the middle part of the front side of the docking plate 847 is locked with the upper end of the motor 9 by a bolt. In order to assist in realizing the connection combination of the moving component 84 and the motor 9, a limiting rod 848 is inserted horizontally into the docking plate 847, and the left and right sides of the limiting rod 848 are plugged into the left and right front ends of the guide frame 849. Through the horizontal limiting effect of the limiting rod 848, the stability of the forward and backward movement of the docking plate 847 can be further enhanced. A horizontal bar 8410 is fixedly connected to the bottom of the guide frame 849 horizontally, and the horizontal bar 8410 is slidably embedded in the limiting guide plate 8411. Through the sliding docking of the horizontal bar 8410 and the limiting guide plate 8411, the guide frame 849 can be in a stable state when sliding horizontally, and the limiting guide plate 8411 is fixed on the front side of the support plate 81.

[0043] Among them, there is a distance between the fixed plate 844 and the connecting frame 845, and the distance between the fixed plate 844 and the connecting frame 845 is set in the shape of an elliptical guide groove as a whole, ensuring that the lower end of the gear 842 can be inserted into the formed elliptical guide groove to meet the stable realization of subsequent elliptical trajectory transmission activities.

[0044] Specifically, in order to increase the stirring range, the servo motor 83 installed at the upper end of the front side of the bracket 82 can be operated when the impeller 13 and the emulsifying head 14 are performing the rapid cutting and emulsification activities. In this way, the rotating shaft 841 connected to the lower end of the servo motor 83 can realize the rotation of the gear 842 connected at the bottom. When the gear 842 rotates, the multiple columns 843 equidistantly connected to the upper end of the fixed plate 844 are driven to achieve the movement of the fixed plate 844. At the same time, with the combination of the connecting frame 845 provided on the outside of the fixed plate 844, an elliptical guide groove can be formed between the fixed plate 844 and the connecting frame 845. Therefore, when the gear 842 and the multiple columns 843 are driven, the movable plate 846 provided at the bottom of the fixed plate 844 can be moved back and forth. At the same time, when the gear 842 changes the transmission position with the multiple columns 843, the movable plate 846 can be pushed left or right, thereby, the guide frame 849 docked on the outside of the movable plate 846 will realize the left and right reciprocating movement through the sliding limit guide of the horizontal bar 8410 provided at the bottom and the limit guide plate 8411. Therefore, the docking plate 847 fixed on the front side of the movable plate 846 will combine the front and rear reciprocating movement of the movable plate 846 with the left and right reciprocating movement of the guide frame 849 to realize the elliptical movement of the motor 9, thereby assisting in realizing the elliptical movement of the impeller 13 and the emulsifying head 14 in the fast rotating cutting state at the bottom, thereby assisting in improving the cutting and emulsifying range thereof, accelerating the efficiency of flame retardant coating preparation, and reducing the occurrence of the problem of fixed stirring position; Secondly, when the docking plate 847 performs elliptical transmission activities, the stability of the movement state can be ensured by the docking effect of the internally inserted horizontal limit rod 848 and the guide frame 849, thereby ensuring the stability of the elliptical movement state of the impeller 13 and the emulsifying head 14.

[0045] See also Figure 9-10 The lifting assembly 85 includes a driving wheel 851, which is connected to the outer side of the upper end of the rotating shaft 841. The driving wheel 851 is connected to the outer transmission of the belt 852. The rear side of the belt 852 is connected to the driven wheel 853. The middle part of the driven wheel 853 is vertically connected with a rotating rod 854. The lower end of the rotating rod 854 is connected to the rotating drum 855. The outer sleeve of the rotating drum 855 is provided with a connecting clamp 856. The right side of the connecting clamp 856 is plugged with a pin shaft 857, and the inner side of the pin shaft 857 is inserted into the transmission groove 858. The transmission groove 858 is opened on the outside of the rotating drum 855, and the transmission groove 858 is opened on the outside of the rotating drum 855. 58 is opened in the shape of a circular groove as a whole, so as to ensure that when the transmission groove 858 is in a rotating state, the pin shaft 857 can realize the up and down reciprocating movement of the connecting clamp 856, the bottom of the rotating cylinder 855 is rotatably connected to the connecting seat 859, the front side of the connecting clamp 856 is fixedly connected to the lifting plate 8510, and the front side of the connecting seat 859 is fixedly connected to the supporting shell 8511. The lifting plate 8510 is movably inserted into the supporting shell 8511, and the upper end of the lifting plate 8510 is connected to the bottom of the support plate 81, and the bottom of the supporting shell 8511 is connected to the upper end of the receiving plate 6.

[0046] Specifically, when the rotating shaft 841 rotates with the servo motor 83, it can also realize the driving of the externally connected driving wheel 851, so that the driving wheel 851 cooperates with the belt 852 connected to the external transmission to synchronously drive the driven wheel 853 connected to the rear side. In this way, the rotating rod 854 vertically connected to the middle of the driven wheel 853 will realize the rotation of the bottom connected to the rotating drum 855. As the rotating drum 855 rotates, the transmission groove 858 opened on the outside of the rotating drum 855 will, along with the rotating state, transmit the pin 857 provided on one side of the inner side of the connecting clamp 856, so that the connecting clamp 856 can reciprocate up and down along the outside of the rotating drum 855. Moving activity, thereby, the lifting plate 8510 docked at the front side of the connecting clamp 856 will move back and forth up and down along the inside of the supporting shell 8511, so that the support plate 81 connected to the upper end of the lifting plate 8510 will realize the overall up and down reciprocating movement of the moving component 84 along the front side of the support shell 4, so that the impeller 13 and the emulsifying head 14 that extend into the interior of the barrel 15 and are in a rapid cutting emulsification state can not only realize elliptical movement stirring, but also realize up and down reciprocating movement stirring, so as to further realize the improvement of the stirring range, further improve the efficiency of the flame retardant coating emulsification preparation, and ensure the dispersion of the coating preparation.

[0047] The above description is merely 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, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A flame retardant fabric, characterized by: Including base fabric layer, flame retardant coating and auxiliary components; The base fabric layer comprises aramid and polyimide fibers; The flame retardant coating comprises a base resin and a main flame retardant; Wherein, the matrix resin comprises one or more of waterborne polyurethane, acrylic resin and silanol-modified vinyl ester copolymer; The main flame retardant includes one or more of aluminum hypophosphite, magnesium borate nanosheets and phosphorus-nitrogen synergistic intumescent flame retardant; The auxiliary components include one or more of zinc borate, nanoclay, hollow alumina microspheres and hyperbranched polyaniline.

2. The method for preparing a flame retardant fabric according to claim 1, characterized in that: The steps include: S1. Base fabric pretreatment: Aramid and polyimide fibers are processed into base fabrics through cotton cleaning, carding, spinning, and weaving. The base fabrics are placed in a vacuum chamber, and argon gas is introduced and radio frequency power is applied to etch the surface of the base fabrics. S2. Preparation of flame retardant coating: adding the flame retardant coating components sequentially into a dispersing emulsifier to uniformly emulsify the flame retardant coating; S3. Coating and curing: The prepared base fabric is input into a double-sided roller coater for double-sided flame retardant coating. The coated base fabric is transferred to a segmented hot air oven for multi-stage drying to complete the preparation of the flame retardant fabric.

3. The method for preparing a flame-retardant fabric according to claim 1, characterized in that: In the step S1, aramid fiber (50-70%) and polyimide fiber (30-50%) are blended and woven.

4. The method for preparing a flame-retardant fabric according to claim 1, wherein: The specific steps of step S2 are: S21: Mix the silicon-oxygen bond-modified vinyl ester resin with deionized water in a ratio of 1:3 and pre-disperse for 5-10 minutes; S21: Add aluminum hypophosphite, magnesium borate nanosheets, and hollow alumina microspheres in sequence and disperse at high speed for 20-30 minutes; S21: Finally, add zinc borate and nanoclay, stir at low speed (400-500 rpm) to defoam for 5-10 minutes.

5. The method for preparing a flame-retardant fabric according to claim 1, characterized in that: The specific steps of the segmented hot air drying oven in step S3 are: S31, pre-curing: 70-80℃ pre-curing for 10-20min; S32, high temperature curing: 130-150℃ high temperature crosslinking for 40-50min; S33, hot pressing curing: hot pressing roller densification at 170-180℃ for 20-30s.

6. The method for preparing a flame retardant fabric according to claim 1, characterized in that: The dispersing emulsifier used in step S2 comprises a base (1), a metal tube (2) is plugged into the right side of the upper end of the base (1), a control panel (3) is docked at the upper end of the metal tube (2), a support shell (4) is fixedly provided in the middle of the upper end of the base (1), a cylinder (5) is installed inside the support shell (4), the upper end of the cylinder (5) is connected to the receiving plate (6), both sides of the receiving plate (6) are plugged into the guide rod (7), and the bottom of the guide rod (7) is fixedly connected to the outer side of the support shell (4), and the upper end of the receiving plate (6) is provided with a movable lifting mechanism. The device (8) is provided with a front side of the movable lifting device (8) and is connected to the top of the motor (9). A flange (10) is installed at the bottom of the motor (9). Support rods (11) are provided on both sides of the bottom of the flange (10). The output end of the bottom of the motor (9) is connected to the central shaft (12). An impeller (13) is installed in the middle of the central shaft (12). An emulsifying head (14) is provided at the bottom of the central shaft (12), and the emulsifying head (14) is connected to the bottom of the support rods (11) on both sides. A barrel (15) is placed inside the front side of the base (1).

7. The method for preparing a flame-retardant fabric according to claim 6, characterized in that: The mobile lifting device (8) includes a support plate (81), the support plate (81) is connected to the front side of the upper end of the support shell (4), the upper end of the support shell (4) is fixedly connected to a bracket (82), the upper end of the bracket (82) is installed with a servo motor (83) on the front side, the bottom output end of the servo motor (83) is connected to the moving component (84), the front side of the moving component (84) is connected to the upper end of the motor (9), the upper end of the moving component (84) is connected to the lifting component (85), and the bottom of the lifting component (85) is connected to the receiving plate (6).

8. The method for preparing a flame-retardant fabric according to claim 7, characterized in that: The moving assembly (84) includes a rotating shaft (841), the rotating shaft (841) is connected to the lower end of the servo motor (83), a gear (842) is provided on the outer side of the lower end of the rotating shaft (841), the outer side of the gear (842) is connected to the column (843), the column (843) is plugged into the upper end of the fixed plate (844), and the bottom of the fixed plate (844) is fixedly connected to the moving plate (846), the upper end of the moving plate (846) is fixedly provided with a connecting frame (845), and the connecting frame (845) is installed on the fixed plate (844). On the outside, the front side of the movable plate (846) is fixedly connected to a docking plate (847), and the front side of the docking plate (847) is locked and connected to the upper end of the motor (9) by bolts. A limiting rod (848) is inserted into the interior of the docking plate (847), and both sides of the limiting rod (848) are plugged into the guide frame (849). The bottom of the guide frame (849) is fixedly connected to a horizontal bar (8410), and the horizontal bar (8410) is slidably embedded in the interior of the limiting guide plate (8411). The limiting guide plate (8411) is fixedly arranged on the front side of the support plate (81).

9. The method for preparing a flame-retardant fabric according to claim 8, characterized in that: The lifting assembly (85) includes a driving wheel (851), the driving wheel (851) is connected to the outer side of the upper end of the rotating shaft (841), the driving wheel (851) is externally connected to a belt (852), one side of the belt (852) is connected to the driven wheel (853), the middle part of the driven wheel (853) is connected to a rotating rod (854), the lower end of the rotating rod (854) is connected to the rotating drum (855), the outer surface of the rotating drum (855) is provided with a connecting clamp (856), one side of the connecting clamp (856) is plugged with a pin shaft (857), and the pin shaft (857) is internally connected to the rotating drum (855). The side is inserted into the transmission groove (858), the transmission groove (858) is opened on the outside of the rotating drum (855), the bottom of the rotating drum (855) is rotatably connected to the connecting seat (859), the front side of the connecting clamp (856) is fixedly connected to the lifting plate (8510), the front side of the connecting seat (859) is fixedly connected to the supporting shell (8511), the lifting plate (8510) is movably inserted into the supporting shell (8511), and the upper end of the lifting plate (8510) is connected to the bottom of the support plate (81), and the bottom of the supporting shell (8511) is connected to the upper end of the receiving plate (6).

10. The method for preparing a flame-retardant fabric according to claim 8, characterized in that: There is a distance between the fixing plate (844) and the connecting frame (845), and the distance between the fixing plate (844) and the connecting frame (845) is arranged in an elliptical guide groove shape as a whole.

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