Flame-retardant antistatic fiber fabric and preparation method thereof

Abstract

The invention discloses a flame-retardant antistatic fiber fabric and a preparation method thereof, and relates to the technical field of fiber fabrics. According to the method, the composite fiber fabric is pulled to be straightened, and the composite fiber fabric is tightly attached to the dipping inclined face and the dipping curved face; in the process of pulling the composite fiber fabric to move, the modified waterborne polyurethane finishing liquid in the heavy-pressure water tank flows out along a first dipping opening in the dipping inclined surface and a second dipping opening in the dipping curved surface, and the flowing modified waterborne polyurethane finishing liquid penetrates through the composite fiber fabric to realize dipping; the composite fiber fabric impregnated in the primary impregnation area is pulled into the impregnation compensation area to be impregnated again, and the impregnated composite fiber fabric is dried to obtain the flame-retardant antistatic fiber fabric. Through the water pressure effect generated by the modified waterborne polyurethane finishing liquid in the heavy-pressure water tank, the impregnation penetrability of the modified waterborne polyurethane finishing liquid on the composite fiber fabric can be improved, and the impregnation effect of the composite fiber fabric can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fiber fabrics, and particularly relates to a flame-retardant and antistatic fiber fabric and a preparation method thereof. Background Art

[0002] At present, most textiles are flammable. Due to the softness and large surface area of textiles, it is easier for textiles to burn extensively in high-temperature environments. At the same time, as a widely used clothing fabric, polyester fabric is prone to generating static electricity due to its poor hygroscopicity and low moisture regain. Therefore, it is necessary to develop a fiber fabric with flame-retardant and antistatic properties.

[0003] In the prior art, generally, a surface fabric and an inner fabric are first produced, and then the surface fabric and the inner fabric are compounded through a compounding process to prepare a composite fabric. Subsequently, the composite fabric is drawn through an impregnation tank storing an antistatic solution, and the impregnated composite fabric can be produced into a fiber fabric with flame-retardant and antistatic properties after drying treatment.

[0004] The above method of directly drawing the composite fabric through the impregnation tank can, to a certain extent, achieve the impregnation treatment of the composite fabric. However, due to the relatively fast drawing speed of the drawn composite fabric, the residence time of the composite fabric in the impregnation tank is relatively short, which is not conducive to the full absorption of the antistatic solution by the composite fabric, and ultimately reduces the antistatic performance of the fiber fabric. Therefore, we provide a flame-retardant and antistatic fiber fabric and a preparation method thereof to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a flame-retardant and antistatic fiber fabric and a preparation method thereof. Through the specific structural design of an impregnation control mechanism, a surface cylinder assembly, and a guiding and regulating mechanism, the problem that the existing method of directly drawing the composite fabric through the impregnation tank can, to a certain extent, achieve the impregnation treatment of the composite fabric, but due to the relatively fast drawing speed of the drawn composite fabric, the residence time of the composite fabric in the impregnation tank is relatively short, which is not conducive to the full absorption of the antistatic solution by the composite fabric, and ultimately reduces the antistatic performance of the fiber fabric is solved.

[0006] To solve the above technical problems, the present invention is realized through the following technical solutions: The present invention is a preparation method of a flame-retardant and antistatic fiber fabric, including the following steps:

[0007] S01. First, prepare functionalized sepiolite with flame retardant function, then mix the functionalized sepiolite and polyethylene terephthalate, and obtain modified polyester fibers through melt spinning; spin the modified polyester fibers to obtain the surface fabric and the inner fabric, and obtain the composite fiber fabric through lamination. Subsequently, prepare the modified aqueous polyurethane finishing solution; pass the composite fiber fabric through the preliminary impregnation area and the impregnation compensation area on the impregnation control mechanism in sequence, adjust the vertical position of the guiding and regulating mechanism, and adjust the heavy pressure water tank on the guiding and regulating mechanism to the set position. At this time, the composite fiber fabric adheres to the bottom of the heavy pressure water tank;

[0008] S02. Drive the first guide roller to abut against the composite fiber fabric against the impregnation inclined surface on one side of the heavy pressure water tank, and then drive the second guide roller and the third guide roller to abut against the composite fiber fabric against the impregnation curved surface at the bottom of the heavy pressure water tank. By pulling the composite fiber fabric to make it in a straightened state, the composite fiber fabric at this time is closely attached to the impregnation inclined surface and the impregnation curved surface;

[0009] S03. Place the prepared modified aqueous polyurethane finishing solution in the heavy pressure water tank. During the process of pulling the composite fiber fabric to move, the modified aqueous polyurethane finishing solution in the heavy pressure water tank flows out along the first impregnation port on the impregnation inclined surface and the second impregnation port on the impregnation curved surface, and the flowing out modified aqueous polyurethane finishing solution passes through the composite fiber fabric to achieve impregnation;

[0010] S04. The composite fiber fabric impregnated in the preliminary impregnation area is pulled into the impregnation compensation area to achieve re - impregnation. After drying, the impregnated composite fiber fabric obtains the flame - retardant and antistatic fiber fabric.

[0011] The present invention is further configured such that the impregnation control mechanism includes an impregnation processing box. A vertical bearing frame is fixedly installed on the outside of the impregnation processing box. A lifting hydraulic cylinder is installed on the top of the vertical bearing frame. Two vertical mounting plates are symmetrically and fixedly arranged at a position near the front end of the top of the impregnation processing box. A fourth guide roller is rotatably installed between the vertical mounting plates. Two vertical guide plates are symmetrically and fixedly arranged at the top of the impregnation processing box and are directly below the lifting hydraulic cylinder.

[0012] The present invention is further configured such that extension limiting seats are fixedly arranged on both opposite sides of the vertical bearing frame. A horizontal guide rod is slidably arranged on the extension limiting seat. A support part is fixedly installed at the end of the horizontal guide rod. A linkage shaft is fixedly installed between the two support parts. A first guide roller is rotatably installed on the linkage shaft. A horizontal toothed plate is fixedly installed on the linkage shaft. A first gear and a second gear are respectively connected by a rotating shaft on an inner side wall of the vertical bearing frame. The second gear meshes with the horizontal toothed plate below it.

[0013] The present invention is further configured such that a dough cylinder assembly is installed above the fourth guide roller; wherein, the dough cylinder assembly includes a cylinder installation shaft penetrating between two vertical installation plates, a dough cylinder rotatably sleeved on the cylinder installation shaft between the two vertical installation plates, dough cylinder limit members symmetrically sleeved on the cylinder installation shaft and penetrating the vertical installation plates, the dough cylinder being fitted between the two dough cylinder limit members, positioning grooves being formed on the circumferential side surfaces of the dough cylinder limit members, and positioning rods being provided on the vertical installation plates and inserted into the corresponding positioning grooves in a mating manner.

[0014] The present invention is further configured such that the guiding and regulating mechanism includes a heavy pressure water tank arranged inside the vertical bearing frame, a support frame fixedly installed on the outer side of the heavy pressure water tank, the output end of the lifting hydraulic cylinder being connected to the top of the support frame, the support frame being slidably sleeved between two vertical guide plates, a vertical toothed plate fixedly installed on one side of the support frame, the vertical toothed plate meshing with a first gear on its one side; a horizontal adjusting rod extending into the preliminary impregnation area is rotatably arranged on one side of the impregnation processing tank, two U-shaped moving frames are symmetrically arranged inside the preliminary impregnation area, the U-shaped moving frames are sleeved on the horizontal adjusting rod and are in threaded cooperation therewith, the U-shaped moving frames are respectively arranged on both sides of the heavy pressure water tank, a second guide roller is rotatably installed inside one of the U-shaped moving frames, and a third guide roller is rotatably installed inside the other U-shaped moving frame.

[0015] The present invention is further configured such that a fifth guide roller is rotatably installed inside the impregnation processing tank, the first guide roller, the second guide roller, the third guide roller, the fourth guide roller, and the fifth guide roller are all located in the preliminary impregnation area, a vertical partition plate for separating the preliminary impregnation area and the impregnation compensation area is fixedly installed inside the impregnation processing tank, a horizontal material guiding table is fixedly installed at the top of the vertical partition plate, a plurality of through-flow openings are arranged in an array on the surface of the horizontal material guiding table, a sixth guide roller is rotatably installed above the horizontal material guiding table, and a fabric guiding outlet is formed on one side of the impregnation processing tank close to the sixth guide roller.

[0016] The present invention is further configured such that two horizontal fixing rods are symmetrically fixed on the side of the heavy pressure water tank away from the first impregnation port, two vertical flow concentrating plates are installed between the horizontal fixing rods, a fabric passing opening is formed on the surface of the vertical flow concentrating plate close to the fabric guiding outlet; a lifting pump located in the preliminary impregnation area is installed at the bottom of the impregnation processing tank, the outlet end of the lifting pump is connected to a diversion pipeline, the end of the diversion pipeline away from the lifting pump is communicated with the impregnation compensation area, a drainage pipeline communicated with the impregnation compensation area is installed at the bottom of the impregnation processing tank, and a control valve is installed on the drainage pipeline.

[0017] The present invention has the following beneficial effects: 1. In the present invention, the prepared modified aqueous polyurethane finishing liquid is placed in a heavy pressure water tank. During the process of pulling and moving the composite fiber fabric, the modified aqueous polyurethane finishing liquid in the heavy pressure water tank flows out through the first impregnation port and the second impregnation port respectively and passes through the composite fiber fabric. When the impregnated composite fiber fabric moves to the second impregnation port through the first impregnation port, the composite fiber fabric is further impregnated through the second impregnation port. Thus, the impregnation time of the modified aqueous polyurethane finishing liquid flowing out of the heavy pressure water tank on the composite fiber fabric can be extended to improve the impregnation effect. Since the composite fiber fabric is pulled and moved in a straightened state, the fibers in the fabric will be separated. At the same time, under the action of the water pressure generated by the modified aqueous polyurethane finishing liquid inside the heavy pressure water tank, the impregnation penetration of the modified aqueous polyurethane finishing liquid on the composite fiber fabric can be improved, thereby greatly improving the impregnation effect of the composite fiber fabric.

[0018] 2. After the prepared modified aqueous polyurethane finishing liquid is placed inside the heavy pressure water tank in the present invention, the composite fiber fabric is first impregnated through the first impregnation port and the second impregnation port for a period of time, so that a certain amount of the modified aqueous polyurethane finishing liquid is stored in the preliminary impregnation area of the impregnation processing tank. Subsequently, the impregnation treatment of the fabric is started by pulling and moving the composite fiber fabric. During the impregnation processing, the controller intermittently starts the lift pump, and the modified aqueous polyurethane finishing liquid in the preliminary impregnation area is transported to the impregnation compensation area through the lift pump. The modified aqueous polyurethane finishing liquid entering the impregnation compensation area realizes the impregnation processing of the composite fiber fabric again. The solution passing through the composite fiber fabric flows into the lower part of the horizontal guide table through the through-flow port, and the solution flowing into the lower part of the horizontal guide table is discharged to the subsequent collection process through the drainage pipeline. The drainage flow rate of the drainage pipeline can be adjusted through the control valve. By the combined use of the preliminary impregnation area and the impregnation compensation area, the impregnation time of the composite fiber fabric in the impregnation processing tank can be extended, thereby improving the impregnation effect on the composite fiber fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of a preparation device for a flame-retardant and antistatic fiber fabric.

[0021] Figure 2 For Figure 1 the side structural view.

[0022] Figure 3 ForFigure 1 The working state diagram of the preparation equipment in

[0023] Figure 4 The structural schematic diagram of the impregnation control mechanism in the present invention.

[0024] Figure 5 is Figure 4 The enlarged view of the local structure at position A in

[0025] Figure 6 is Figure 4 The side view of the structure of

[0026] Figure 7 is Figure 6 The enlarged view of the local structure at position B in

[0027] Figure 8 is Figure 4 The structural schematic diagram from the upward view angle.

[0028] Figure 9 The structural sectional view of the impregnation control mechanism in the present invention.

[0029] Figure 10 The structural schematic diagram of the surface cylinder assembly in the present invention.

[0030] Figure 11 The structural schematic diagram of the guiding and regulating mechanism in the present invention.

[0031] Figure 12 is Figure 11 The structural schematic diagram from another angle.

[0032] In the drawings, the list of components represented by each reference numeral is as follows:

[0033] 1 - Impregnation control mechanism, 101 - Impregnation processing tank, 102 - Vertical bearing frame, 103 - Lifting hydraulic cylinder, 104 - Vertical mounting plate, 105 - Fourth guide roller, 106 - Vertical guide plate, 107 - Extension limit seat, 108 - Horizontal guide rod, 109 - Support part, 110 - Linkage shaft, 111 - First guide roller, 112 - Horizontal toothed plate, 113 - First gear, 114 - Second gear, 115 - Fifth guide roller, 116 - Vertical partition plate, 117 - Horizontal material guide table, 118 - Flow-through port, 119 - Sixth guide roller, 120 - Fabric export, 121 - Lift pump, 122 - Diversion pipeline, 123 - Drainage pipeline, 124 - Control valve, 125 - Preliminary impregnation area, 126 - Impregnation compensation area, 2 - Fabric cylinder assembly, 201 - Cylinder mounting shaft, 202 - Fabric cylinder, 203 - Fabric cylinder limit piece, 204 - Positioning groove, 3 - Guide and regulation mechanism, 301 - Heavy pressure water tank, 302 - Support frame, 303 - Vertical toothed plate, 304 - Horizontal adjusting rod, 305 - U-shaped moving frame, 306 - Second guide roller, 307 - Third guide roller, 308 - First impregnation port, 309 - Horizontal fixing rod, 310 - Vertical flow-condensing plate, 311 - Fabric passing port. Detailed implementation mode

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] For the first specific embodiment, please refer to Figure 1-12 , the present invention is a preparation method of a flame-retardant and antistatic fiber fabric, including the following steps:

[0036] S01. First, prepare functionalized sepiolite with flame-retardant function, then mix the functionalized sepiolite and polyethylene terephthalate glycol, and obtain modified polyester fiber after melt spinning; spin the modified polyester fiber to obtain the surface fabric and the inner fabric, and obtain the composite fiber fabric after compounding, and then prepare the modified aqueous polyurethane finishing solution;

[0037] S02. Pass the composite fiber fabric through the preliminary impregnation area 125 and the impregnation compensation area 126 on the impregnation control mechanism 1 in sequence, adjust the vertical position of the guide and regulation mechanism 3, and adjust the heavy pressure water tank 301 on the guide and regulation mechanism 3 to the set position. At this time, the composite fiber fabric is attached to the bottom of the heavy pressure water tank 301;

[0038] S03. Drive the first guide roller 111 to press against the composite fiber fabric and lean it against the impregnation inclined surface on one side of the heavy pressure water tank 301. Then drive the second guide roller 306 and the third guide roller 307 to press against the composite fiber fabric and lean it against the impregnation curved surface at the bottom of the heavy pressure water tank 301. By pulling the composite fiber fabric to make it in a straightened state, the composite fiber fabric at this time closely adheres to the impregnation inclined surface and the impregnation curved surface.

[0039] S04. Place the prepared modified aqueous polyurethane finishing solution in the heavy pressure water tank 301. During the process of pulling the composite fiber fabric to move, the modified aqueous polyurethane finishing solution in the heavy pressure water tank 301 flows out along the first impregnation port 308 on the impregnation inclined surface and the second impregnation port on the impregnation curved surface. The flowing-out modified aqueous polyurethane finishing solution passes through the composite fiber fabric to achieve impregnation.

[0040] S05. The composite fiber fabric impregnated in the preliminary impregnation area 125 is pulled into the impregnation compensation area 126 for re-impregnation. After drying the impregnated composite fiber fabric, the flame-retardant and antistatic fiber fabric is obtained.

[0041] The above functionalized sepiolite can be prepared by the following method: First, mix cyanuric chloride with acetone, add sodium sulfide and hydrochloric acid aqueous solution and then react. After filtration, washing and drying, a flame retardant is obtained; mix sepiolite with hydrochloric acid aqueous solution and react. After filtration and washing, hydroxylated sepiolite is obtained. Then mix the hydroxylated sepiolite with water for ultrasonic dispersion. After adding ethanol aqueous solution and γ-aminopropyltriethoxysilane and reacting, a precipitate is obtained after centrifugal filtration. After washing and drying the precipitate, amino-functionalized sepiolite is obtained; mix the amino-functionalized sepiolite, maleic anhydride and N,N-dimethylformamide and react. After suction filtration, a filter cake is obtained. After washing, modified sepiolite is obtained. Then mix the modified sepiolite, the flame retardant, sodium carbonate aqueous solution and phosphate buffer solution and react. After filtration, a filter cake is obtained. After washing and drying, functionalized sepiolite is obtained.

[0042] After obtaining the functionalized sepiolite, mix the functionalized sepiolite with polyethylene terephthalate. After melt spinning, cooling, drawing and cutting, modified polyester fibers are obtained. Then, through a textile machine, a surface fabric and an inner fabric are produced. After laminating the surface fabric and the inner fabric, a composite fiber fabric is obtained.

[0043] The above-mentioned modified aqueous polyurethane finishing liquid is prepared by the following method: Mix nano-zinc oxide with water and perform ultrasonic dispersion. After adding an ethanol aqueous solution and γ-aminopropyltriethoxysilane, react. After centrifugal filtration, obtain a centrifugal precipitate. Obtain modified nano-zinc oxide through washing and drying. Mix the modified nano-zinc oxide with hydroxy silicone oil and react. After the reaction, obtain modified silicone oil; Mix polypropylene glycol, 2,4-toluene diisocyanate and dibutyltin dilaurate and react. After the reaction, add the modified silicone oil and acetone and continue to react. After the reaction, add triethylamine to neutralize to obtain modified aqueous polyurethane. Mix the modified aqueous polyurethane with water and stir. After stirring evenly, rotary evaporate to remove acetone to obtain the modified aqueous polyurethane finishing liquid.

[0044] In this embodiment of the present invention, the impregnation control mechanism 1 includes an impregnation processing box 101. A vertical bearing frame 102 is fixedly installed on the outside of the impregnation processing box 101. A lifting hydraulic cylinder 103 is installed on the top of the vertical bearing frame 102. Two vertical mounting plates 104 are symmetrically fixed at a position near the front end of the top of the impregnation processing box 101. A fourth guide roller 105 is rotatably installed between the vertical mounting plates 104. Two vertical guide plates 106 are symmetrically fixed at the top of the impregnation processing box 101 and are located directly below the lifting hydraulic cylinder 103; Extension limit seats 107 are fixedly arranged on both opposite sides of the vertical bearing frame 102. A horizontal guide rod 108 is slidably arranged on the extension limit seats 107. A support portion 109 is fixedly installed at the end of the horizontal guide rod 108. A linkage shaft 110 is fixedly installed between the two support portions 109. A first guide roller 111 is rotatably installed on the linkage shaft 110. A horizontal toothed plate 112 is fixedly installed on the linkage shaft 110 (through the cooperative action of the two horizontal guide rods 108, the linkage shaft 110 is kept moving smoothly horizontally, so that the horizontal toothed plate 112 and the first guide roller 111 can only move horizontally and cannot rotate). One inner side wall of the vertical bearing frame 102 is respectively connected with a first gear 113 and a second gear 114 through a rotating shaft. The second gear 114 meshes with the horizontal toothed plate 112 below it.

[0045] In this embodiment of the present invention, a surface cylinder assembly 2 is installed above the fourth guide roller 105; wherein, the surface cylinder assembly 2 includes a cylinder installation shaft 201 penetrating between two vertical installation plates 104, a fabric cylinder 202 located between the two vertical installation plates 104 is rotatably sleeved on the cylinder installation shaft 201, surface cylinder limit members 203 penetrating the vertical installation plates 104 are symmetrically sleeved on the cylinder installation shaft 201, the fabric cylinder 202 is attached between the two surface cylinder limit members 203, a positioning groove 204 is formed on the circumferential side surface of the surface cylinder limit member 203, and a positioning rod (specifically, a positioning rod is threadedly connected to a support plate on the surface of the vertical installation plate 104, not shown in the figure) which is in plug-in fit with the corresponding positioning groove 204 is arranged on the vertical installation plate 104. After the fabric cylinder 202 is sleeved on the cylinder installation shaft 201, the two surface cylinder limit members 203 are sleeved on the cylinder installation shaft 201, so that the surface cylinder limit members 203 are attached to the ends of the fabric cylinder 202 to limit the horizontal position of the fabric cylinder 202. Finally, by rotating each positioning rod to insert it into the corresponding positioning groove 204, the stable installation of the entire surface cylinder assembly 2 between the two vertical installation plates 104 is realized.

[0046] In this embodiment of the present invention, the guide and control mechanism 3 includes a pressure water tank 301 arranged on the inner side of the vertical carrier frame 102, a support frame 302 is fixedly installed on the outer side of the pressure water tank 301, the output end of the lifting hydraulic cylinder 103 is connected to the top of the support frame 302, the support frame 302 is slidably sleeved between the two vertical guide plates 106, a vertical tooth plate 303 is fixedly installed on one side of the support frame 302, and the vertical tooth plate 303 is meshed with the first gear 113 on one side thereof; a horizontal adjustment rod 304 extending to the inside of the preliminary impregnation area 125 is rotatably arranged on one side of the impregnation processing box 101, and two U-shaped moving frames 305 are symmetrically arranged inside the preliminary impregnation area 125, and the U The U-shaped movable frame 305 is sleeved on the horizontal adjustment rod 304 and the two are threadedly matched. The U-shaped movable frames 305 are respectively arranged on both sides of the heavy pressure water tank 301, and a second guide roller 306 is rotatably installed inside one of the U-shaped movable frames 305, and a third guide roller 307 is rotatably installed inside the other U-shaped movable frame 305; in the initial state, the bottom of the heavy pressure water tank 301 is close to the top of the impregnation processing box 101, and at this time the first guide roller 111 is close to the surface drum assembly 2, and the support portion 109 deviates from the corresponding extension limit seat 107, and the active end of the composite fiber fabric on the fabric drum 202 is pulled out, and then the composite fiber fabric is pulled and wound around the fourth guide roller 1 05, the first guide roller 111, the second guide roller 306 and the third guide roller 307, and then the lifting hydraulic cylinder 103 controls the support frame 302 to gradually move downward, and the support frame 302 sliding along the vertical guide plate 106 drives the heavy pressure water tank 301 to move downward synchronously. In the process of controlling the heavy pressure water tank 301 to move downward, the vertical tooth plate 303 that moves downward synchronously with the support frame 302 drives the first gear 113 to rotate, and the second gear 114 that rotates synchronously with the first gear 113 drives the horizontal tooth plate 112 to move horizontally in the direction deviating from the noodle drum assembly 2 (in this process, the bottom of the heavy pressure water tank 301 presses the composite fiber fabric downward), until When the pressure water tank 301 moves downward to the set position, the first guide roller 111 now confines the composite fiber fabric on the impregnation slope of the pressure water tank 301, and then the U-shaped moving frames 305 on both sides of the pressure water tank 301 are moved closer to each other by rotating the horizontal adjustment rod 304, until the second guide roller 306 and the third guide roller 307 simultaneously confine the composite fiber fabric on the slope of the pressure water tank 301, and in the process of traction of the composite fiber fabric, the composite fiber fabric can be wrapped and tightly attached to the pressure water tank 301, and at this time, the first impregnation port 308 on the impregnation slope and the second impregnation port on the impregnation curved surface are covered by the composite fiber fabric (such as Figure 3 shown).

[0047] Next, place the prepared modified aqueous polyurethane finishing solution in the heavy pressure water tank 301. During the process of pulling and moving the composite fiber fabric, the modified aqueous polyurethane finishing solution in the heavy pressure water tank 301 flows out through the first impregnation port 308 and the second impregnation port respectively and passes through the composite fiber fabric. When the impregnated composite fiber fabric moves to the second impregnation port through the first impregnation port 308, the impregnation treatment of the composite fiber fabric is further realized through the second impregnation port. Thus, the impregnation time of the modified aqueous polyurethane finishing solution flowing out of the heavy pressure water tank 301 on the composite fiber fabric can be extended to improve the impregnation effect. Since the composite fiber fabric is pulled and moved in a straightened state, the fibers in the fabric will be pulled apart. At the same time, under the action of the water pressure generated by the modified aqueous polyurethane finishing solution inside the heavy pressure water tank 301 (dynamic impregnation), the impregnation penetration of the modified aqueous polyurethane finishing solution on the composite fiber fabric can be improved, thereby greatly improving the impregnation effect of the composite fiber fabric.

[0048] Specific Embodiment 2: On the basis of Specific Embodiment 1, a fifth guide roller 115 is rotatably installed inside the impregnation processing box 101. The first guide roller 111, the second guide roller 306, the third guide roller 307, the fourth guide roller 105, and the fifth guide roller 115 are all located in the preliminary impregnation area 125. A vertical partition plate 116 for separating the preliminary impregnation area 125 and the impregnation compensation area 126 is fixedly installed inside the impregnation processing box 101. A horizontal material guiding table 117 is fixedly installed at the top of the vertical partition plate 116. A plurality of through-flow ports 118 are arranged in an array on the surface of the horizontal material guiding table 117. A sixth guide roller 119 is rotatably installed above the horizontal material guiding table 117. A fabric outlet 120 is opened on one side of the impregnation processing box 101 close to the sixth guide roller 119.

[0049] In this embodiment of the present invention, two horizontal fixing rods 309 are symmetrically fixed on one side of the heavy pressure water tank 301 away from the first impregnation port 308. Two vertical flow concentrating plates 310 are installed between the horizontal fixing rods 309. A fabric passing port 311 is formed on the surface of the vertical flow concentrating plate 310 closer to the fabric guiding outlet 120 (ensuring that the composite fiber fabric can pass through the fabric guiding outlet 120 from the fabric passing port 311). After the composite fiber fabric is successively wound around the fourth guide roller 105, the first guide roller 111, the second guide roller 306, and the third guide roller 307, the movable end of the composite fiber fabric is passed through the bottom of the fifth guide roller 115 (close to the fifth guide roller 115), and moves along the top of the horizontal material guiding table 117 through the sixth guide roller 119. After being wound around the sixth guide roller 119, it passes through the fabric guiding outlet 120 and is fixed on the traction power device. When the heavy pressure water tank 301 is moved downward to the set position, the vertical flow concentrating plate 310 moving synchronously with the heavy pressure water tank 301 just presses against the top surface of the composite fiber fabric. Under the combined action of the vertical flow concentrating plate 310 and the sixth guide roller 119, the composite fiber fabric moves closely along the surface of the horizontal material guiding table 117. During the process of pulling the composite fiber fabric, it moves according to Figure 3 the shown movement trajectory.

[0050] A lifting pump 121 is installed at the bottom of the impregnation processing tank 101 in the preliminary impregnation area 125. The outlet end of the lifting pump 121 is connected to a diversion pipeline 122. The end of the diversion pipeline 122 away from the lifting pump 121 communicates with the impregnation compensation area 126. A drain pipeline 123 communicating with the impregnation compensation area 126 is installed at the bottom of the impregnation processing tank 101. A control valve 124 is installed on the drain pipeline 123; after the prepared modified waterborne polyurethane finishing liquid is placed inside the heavy pressure water tank 301, the composite fiber fabric is first impregnated through the first impregnation port 308 and the second impregnation port for a period of time, so that a certain amount of the modified waterborne polyurethane finishing liquid is stored in the preliminary impregnation area 125 in the impregnation processing tank 101. Subsequently, the impregnation treatment of the fabric is started by pulling the composite fiber fabric to move. During the impregnation processing, the controller intermittently starts the lifting pump 121, and the modified waterborne polyurethane finishing liquid in the preliminary impregnation area 125 is conveyed to the impregnation compensation area 126 through the lifting pump 121. The modified waterborne polyurethane finishing liquid entering the impregnation compensation area 126 impregnates the composite fiber fabric again. The solution passing through the composite fiber fabric flows into the lower part of the horizontal material guiding table 117 through the through-flow port 118. The solution flowing into the lower part of the horizontal material guiding table 117 is discharged to the subsequent collection process through the drain pipeline 123. The drainage flow rate of the drain pipeline 123 can be adjusted through the control valve 124. By the combined use of the preliminary impregnation area 125 and the impregnation compensation area 126, the impregnation time of the composite fiber fabric in the impregnation processing tank 101 can be extended, thereby improving the impregnation effect on the composite fiber fabric.

[0051] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0052] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A method for preparing a flame retardant and antistatic fiber fabric, characterized in that: The steps include: S01, first preparing a functionalized sepiolite with flame retardant function, then mixing the functionalized sepiolite with polyethylene terephthalate, and obtaining modified polyester fiber after melt spinning; S02, spinning the modified polyester fiber to obtain a surface layer fabric and an inner layer fabric, compounding to obtain a composite fiber fabric, and then preparing a modified waterborne polyurethane finishing liquid; S03, passing the composite fiber fabric through the preliminary impregnation area and the impregnation compensation area on the impregnation control mechanism in sequence, adjusting the vertical position of the guide regulating mechanism, and adjusting the heavy pressure water tank on the guide regulating mechanism to a set position, at which time the composite fiber fabric is attached to the bottom of the heavy pressure water tank; S04, driving the first guide roller to press the composite fiber fabric against the impregnation inclined surface on one side of the heavy pressure water tank, and then driving the second guide roller and the third guide roller to press the composite fiber fabric against the impregnation curved surface at the bottom of the heavy pressure water tank, and pulling the composite fiber fabric to make it in a straightened state, so that the composite fiber fabric is tightly pressed against the impregnation inclined surface and the impregnation curved surface; S05, placing the prepared modified waterborne polyurethane finishing liquid in a heavy pressure water tank, and in the process of pulling the composite fiber fabric to move, the modified waterborne polyurethane finishing liquid in the heavy pressure water tank flows out along the first impregnation port on the impregnation inclined surface and the second impregnation port on the impregnation curved surface, and the outflowing modified waterborne polyurethane finishing liquid passes through the composite fiber fabric to achieve impregnation; S06. The composite fiber fabric impregnated in the preliminary impregnation area is drawn into the impregnation compensation area for re-impregnation. The composite fiber fabric after impregnation is dried to obtain a flame-retardant and antistatic fiber fabric.

2. The method for preparing a flame retardant and antistatic fiber fabric according to claim 1, characterized in that: The impregnation control mechanism includes an impregnation processing box, a vertical support frame is fixedly installed on the outside of the impregnation processing box, a lifting hydraulic cylinder is installed on the top of the vertical support frame, two vertical mounting plates are symmetrically fixed near the front end of the top of the impregnation processing box, a fourth guide roller is rotatably installed between the vertical mounting plates, and two vertical guide plates are symmetrically fixed on the top of the impregnation processing box and are located directly below the lifting hydraulic cylinder.

3. The method for preparing a flame retardant and antistatic fiber fabric according to claim 2, characterized in that: The vertical support frame is fixedly provided with extended limit seats on both opposite sides, and a horizontal guide rod is slidably provided on the extended limit seat. A support part is fixedly installed on the end of the horizontal guide rod, and a linkage shaft is fixedly installed between the two support parts. A first guide roller is rotatably installed on the linkage shaft, and a horizontal tooth plate is fixedly installed on the linkage shaft. A first gear and a second gear are respectively connected to an inner side wall of the vertical support frame through a rotating shaft, and the second gear is meshed with a horizontal tooth plate thereunder.

4. The method for preparing a flame retardant and antistatic fiber fabric according to claim 3, characterized in that: A noodle drum assembly is installed above the fourth guide roller; wherein the noodle drum assembly includes a drum mounting shaft penetrating between two vertical mounting plates, a fabric drum located between the two vertical mounting plates is rotatably sleeved on the drum mounting shaft, a noodle drum limiter penetrating the vertical mounting plates is symmetrically sleeved on the drum mounting shaft, the fabric drum is snugly arranged between the two noodle drum limiters, a positioning groove is provided on the peripheral side surface of the noodle drum limiter, and a positioning rod is provided on the vertical mounting plate to be plugged into the corresponding positioning groove.

5. The method for preparing a flame retardant and antistatic fiber fabric according to claim 4, characterized in that: The guide and control mechanism comprises a pressure water tank arranged inside the vertical bearing frame, a support frame is fixedly installed outside the pressure water tank, the output end of the lifting hydraulic cylinder is connected to the top of the support frame, the support frame sliding sleeve is arranged between two vertical guide plates, a vertical tooth plate is fixedly installed on one side of the support frame, and the vertical tooth plate is meshed with a first gear on one side thereof; A horizontal adjustment rod extending to the interior of the preliminary impregnation area is rotatably provided on one side of the impregnation processing box, and two U-shaped movable frames are symmetrically provided inside the preliminary impregnation area. The U-shaped movable frames are sleeved on the horizontal adjustment rod and the two are threadedly matched. The U-shaped movable frames are respectively arranged on both sides of the heavy pressure water tank, and a second guide roller is rotatably installed inside one of the U-shaped movable frames, and a third guide roller is rotatably installed inside the other U-shaped movable frame.

6. The method for preparing a flame retardant and antistatic fiber fabric according to claim 5, characterized in that: A fifth guide roller is rotatably installed inside the impregnation processing box, the first guide roller, the second guide roller, the third guide roller, the fourth guide roller and the fifth guide roller are all located in the preliminary impregnation area, a vertical partition plate for separating the preliminary impregnation area and the impregnation compensation area is fixedly installed inside the impregnation processing box, a horizontal material guide table is fixedly installed on the top of the vertical partition plate, a plurality of flow openings are arranged in an array on the surface of the horizontal material guide table, a sixth guide roller is rotatably installed above the horizontal material guide table, and a fabric outlet is provided on the side of the impregnation processing box close to the sixth guide roller.

7. The method for preparing a flame retardant and antistatic fiber fabric according to claim 6, characterized in that: Two horizontal fixing rods are symmetrically fixed on one side of the heavy pressure water tank away from the first impregnation port, two vertical flow collecting plates are installed between the horizontal fixing rods, and a fabric passage opening is opened on the surface of the vertical flow collecting plate close to the fabric outlet; A lifting pump located in the preliminary impregnation area is installed at the bottom of the impregnation processing box, and a diversion pipe is connected to the outlet end of the lifting pump. The end of the diversion pipe away from the lifting pump is connected to the impregnation compensation area. A drainage pipe connected to the impregnation compensation area is installed at the bottom of the impregnation processing box, and a control valve is installed on the drainage pipe.

8. A flame-retardant antistatic fiber fabric prepared by the method for preparing a flame-retardant antistatic fiber fabric as described in any one of claims 1 to 7.

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