An apparatus and method for making a wet face material

Abstract

The application discloses a kind of equipment for making wet method fabric, including first discharging device, storage device, pretreatment device, first coating device, roller pressing device, impregnation device, second coating device, coagulation tank, washing tank, drying device, setting device, printing device, winding device in turn, the first substrate and the second substrate are handled respectively in the application, and the composite fabric is obtained by laminating the first substrate and the second substrate after processing, to solve the negative influence caused by the existing coating thickness being too thick. The surface layer is a polymer material, and the thickness of the overall technical cloth is increased by the composite form of the first substrate roll and the second substrate roll, and the thickness of the intermediate layer can also be adjusted to correspondingly reduce the thickness of the surface layer.

Description

Technical Field

[0001] This application relates to a coating apparatus, and more particularly to an apparatus and method for producing wet-laid fabrics. Background Technology

[0002] Technical fabric is a new type of composite fabric. Because it is similar to genuine leather in appearance and texture, while having better breathability and skin-friendly feel, it is loved by consumers and widely used in soft upholstery products such as sofas, beds, and vehicle interiors.

[0003] The existing production and processing of technical fabrics can be divided into dry process and wet process according to the production technology. The thickness of technical fabrics produced by the traditional wet process is adjusted by controlling the coating thickness of the polymer material layer. However, if the coating thickness of the polymer material layer is too thick, it will reduce its coagulation efficiency and cause the tear resistance and folding resistance of the technical fabric to decrease. Corresponding improvements are needed. Summary of the Invention

[0004] This invention discloses an apparatus and preparation method for producing wet-laid fabrics, which solves the problem that excessive coating thickness of existing polymer materials reduces their coagulation efficiency and performance.

[0005] An apparatus for producing wet-laid fabrics includes, in sequence, a first discharge device, a storage device, a pretreatment device, a first coating device, a roller pressing device, an impregnation device, a second coating device, a coagulation tank, a washing tank, a drying device, a setting device, a printing device, and a winding device.

[0006] The first substrate roll and the second substrate roll are synchronously conveyed by overlapping unwinding through the first discharge device. After storage and tension adjustment in the storage device, they enter the pretreatment device to increase the humidity of the first substrate and the second substrate and improve their hydrophilicity.

[0007] The first substrate and the second substrate are separated after passing through a pretreatment device. The first substrate enters a first coating device to form an intermediate layer. The second substrate enters a rolling device to remove air and then enters an impregnation device for immersion. The first substrate and the second substrate overlap and are connected through the intermediate layer. The second coating device forms a surface layer on the coating surface of the second substrate to obtain a semi-finished composite fabric.

[0008] The semi-finished composite fabric is solidified in the coagulation tank and then washed in the washing tank. It is then dried in the drying device, stretched by the setting device, and dried again. After surface coating by the printing device, the finished composite fabric is obtained and then wound up by the winding device.

[0009] This application addresses the negative impacts of excessive coating thickness in existing technologies by separately processing a first substrate and a second substrate, and then laminating the processed first and second substrates to obtain a composite fabric. The surface layer is a polymer material. The overall thickness of the technical fabric is increased by combining rolls of the first and second substrates, while the thickness of the intermediate layer can be adjusted to correspondingly reduce the thickness of the surface layer.

[0010] The equipment in this application can simultaneously perform the storage, storage, and pretreatment steps of the first substrate and the second substrate through the cooperation of the first discharge device, the storage device, and the pretreatment device, thereby maximizing the utilization rate of the equipment; the first coating device is used to coat the first substrate to form an intermediate layer; the roller pressing device and the impregnation device are used to adjust the humidity of the second substrate; after the intermediate layer on the second substrate is bonded to the first substrate, the second coating device coats the second substrate to form a top layer.

[0011] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0012] Optionally, the pretreatment device includes a first impregnation tank, a pre-solidification tank, and a first ironing mechanism. The first impregnation tank is used to soak the first substrate and the second substrate. After passing through the pre-solidification tank, the first substrate and the second substrate enter the first ironing mechanism. The first ironing mechanism is equipped with a plurality of heating rollers to iron the first substrate and the second substrate in an overlapping state on both sides.

[0013] Optionally, the first coating apparatus includes a guiding mechanism for guiding the first substrate and the second substrate respectively, and a coating mechanism for coating the first substrate.

[0014] Optionally, the rolling device consists of several sets of rolling mechanisms. Each rolling mechanism includes a support, a first roller, and a second roller. The shaft of the first roller is rotatably connected to the support, and the second roller is movably connected to the support so that the axis of the second roller moves closer to or further away from the first roller. The first roller and the second roller cooperate to roll the second substrate.

[0015] Optionally, an extrusion mechanism acting on the second substrate is provided between the impregnation device and the second coating device. After passing through the extrusion mechanism, the second substrate is bonded to the intermediate layer on the first substrate and enters the second coating device simultaneously.

[0016] Optionally, the washing tank is provided with several sets of roller pressing mechanisms, and the composite fabric alternately passes through the washing tank and the roller pressing mechanisms. A pressing device for squeezing out excess water from the composite fabric is also provided between the washing tank and the drying device.

[0017] Optionally, the drying device consists of several ironing mechanisms, each including a first guide roller, a second guide roller, and a heating roller. The composite fabric passes sequentially through the first guide roller, the heating roller, and the second guide roller. The axes of the first guide roller, the heating roller, and the second guide roller are parallel to each other and staggered along the height direction. The first guide roller and the second guide roller are located above the heating roller, and the distance between the first guide roller and the second guide roller is smaller than the diameter of the heating roller, in order to increase the contact area between the composite fabric and the heating roller.

[0018] Optionally, the shaping device includes a traction mechanism that pulls the composite fabric on both sides along the direction of travel of the composite fabric, and a hot air oven for drying the composite fabric.

[0019] Optionally, the device further includes a second discharge device located downstream of the drying device for unwinding a third substrate, which enters the shaping device synchronously after being laminated with the composite fabric.

[0020] A method for preparing a composite fabric, using the above-mentioned equipment, includes the following steps:

[0021] S1. The first substrate roll and the second substrate roll are unwound and discharged through the first discharge device. After passing through the first discharge device, the first substrate and the second substrate are overlapped and synchronously transported to the storage device. The storage device stores the first substrate and the second substrate and adjusts the tension.

[0022] S2. The first substrate and the second substrate are simultaneously introduced into the pretreatment device for impregnation to adjust the hydrophilicity of the first substrate and the second substrate;

[0023] S3. The first substrate enters the first coating device for coating to form an intermediate layer;

[0024] S4. The second substrate enters the roller pressing device to remove air, and then enters the impregnation device to fully soak and increase humidity to prevent penetration during subsequent coating.

[0025] S5. One side of the second substrate is bonded to the intermediate layer on the first substrate, and then enters the second coating device for coating, forming a surface layer on the other side of the second substrate, to obtain a semi-finished composite fabric.

[0026] S6. The semi-finished composite fabric is sequentially passed through a coagulation tank to solidify its surface layer, a washing tank for cleaning, a drying device for initial drying, a shaping device for widening and shaping and secondary drying, and a printing device for surface coating to obtain the finished composite fabric.

[0027] S7. The finished composite fabric is wound up using a winding device. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a partial structure of the device in this application. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of a partial structure of the device in this application. Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the pretreatment device in this application;

[0031] Figure 4 This is a schematic diagram of the structure of the first coating device, the roller pressing device, the impregnation device, and the second coating device in this application;

[0032] Figure 5 This is a schematic diagram of the drying device in this application;

[0033] Figure 6 This is a cross-sectional view of the composite fabric.

[0034] Figure 7 This is a schematic diagram of the structure of Embodiment 3 in this application.

[0035] The annotations in the figure are explained as follows:

[0036] 1. First discharge device; 11. Printing device; 12. Rewinding device; 13. Second discharge device; 14. First substrate; 15. Second substrate; 2. Storage device;

[0037] 3. Pretreatment device; 31. First impregnation tank; 32. Pre-solidification tank; 33. First ironing mechanism; 34. Heating roller;

[0038] 4. First coating device; 41. First guide roller; 42. Second guide roller; 43. Third guide roller;

[0039] 5. Roller pressing device; 51. Support frame; 52. First roller; 53. Second roller;

[0040] 61. Impregnation device; 62. Second coating device; 63. Extrusion mechanism; 7. Coagulation tank; 8. Washing tank; 81. Rolling device;

[0041] 9. Drying device; 91. First guide roller; 92. Second guide roller; 93. Heating roller;

[0042] 10. Shaping device. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example 1

[0046] refer to Figures 1-6 As shown, in one embodiment of this application, an apparatus for producing wet fabric is disclosed. The apparatus includes a first discharge device 1, a storage device 2, a pretreatment device 3, a first coating device 4, a roller pressing device 5, an impregnation device 61, a second coating device 62, a coagulation tank 7, a washing tank 8, a drying device 9, a setting device 10, a printing device 11, and a winding device 12 arranged in sequence.

[0047] The first discharge device 1 is used to unwind the first substrate roll and the second substrate roll, so that the first substrate 14 and the second substrate 15 overlap and are synchronously conveyed downstream. Then, the material is stored and the tension is adjusted in the storage device 2. The first substrate 14 and the second substrate 15 are soaked and the humidity is adjusted in the pretreatment device 3, which can improve the hydrophilicity of the first substrate 14 and the second substrate 15 and increase the adhesion effect between the coating material and the substrate in the subsequent coating steps.

[0048] Furthermore, after the first substrate 14 and the second substrate 15 are separated by the pretreatment device 3, the first substrate 14 enters the first coating device 4 to be coated to form an intermediate layer 16, and the second substrate 15 enters the rolling device 5 to be rolled to remove air and then enters the impregnation device 61 for immersion. The first substrate 14 and the second substrate 15 overlap and are connected through the intermediate layer 16. The second coating device 62 forms a surface layer 17 on the coating surface of the second substrate 15 to obtain a semi-finished product of the composite fabric.

[0049] After the semi-finished composite fabric is solidified in the coagulation tank 7, it enters the washing tank 8 for cleaning, and then enters the drying device 9 for preliminary drying. After being stretched by the setting device 10, it is dried a second time. After being surface coated by the printing device 11, the finished composite fabric is obtained and then wound up by the winding device 12.

[0050] refer to Figure 3 In one embodiment of this application, the pretreatment device 3 includes a first impregnation tank 31, a pre-solidification tank 32, and a first ironing mechanism 33. The first impregnation tank 31 is used to soak the first substrate 14 and the second substrate 15. After passing through the pre-solidification tank 32, the first substrate 14 and the second substrate 15 enter the first ironing mechanism 33. The first ironing mechanism 33 is equipped with a plurality of heating rollers 34 to iron the first substrate 14 and the second substrate 15 in an overlapping state on both sides. For example... Figure 3 As shown, there are four heating rollers 34. The first substrate 14 and the second substrate 15 are transported and the contact surface is adjusted by the rollers arranged between the heating rollers 34, that is, ironing the front and back sides.

[0051] In some embodiments, the first coating apparatus 4 includes a guiding mechanism for guiding the first substrate 14 and the second substrate 15 respectively, and a coating mechanism for coating the first substrate 14.

[0052] Preferably, the guiding mechanism includes a first guide roller 41, a second guide roller 42, and a third guide roller 43 disposed upstream and downstream of the coating mechanism. The first substrate 14 and the second substrate 15 are separated at the first guide roller 41. The first substrate 14 enters the coating mechanism along the first guide roller 41 and is then conveyed downstream along the second guide roller 42. The second substrate 15 is conveyed downstream along the third guide roller 43.

[0053] refer to Figure 4 In some embodiments, the rolling device 5 is composed of several sets of rolling mechanisms. The rolling mechanism includes a support 51, a first roller 52, and a second roller 53. The shaft of the first roller 52 is rotatably connected to the support 51, and the second roller 53 is movably connected to the support 51 so that the axis of the second roller 53 moves closer to or further away from the first roller 52. The first roller 52 and the second roller 53 cooperate to roll the second substrate 15.

[0054] refer to Figure 4 In some embodiments, an extrusion mechanism 63 acting on the second substrate 15 is provided between the impregnation device 61 and the second coating device 62. After passing through the extrusion mechanism 63, the second substrate 15 is bonded to the intermediate layer 16 on the first substrate 14 and enters the second coating device 62 simultaneously.

[0055] Preferably, the washing tank 8 is equipped with several sets of roller pressing mechanisms, and the composite fabric alternately passes through the washing tank 8 and the roller pressing mechanisms. A pressing device 81 for squeezing out excess water from the composite fabric is also provided between the washing tank 8 and the drying device 9.

[0056] refer to Figure 5 In some embodiments, the drying device 9 consists of several ironing mechanisms, each including a first guide roller 91, a second guide roller 92, and a heating roller 93. The composite fabric passes sequentially through the first guide roller 91, the heating roller 93, and the second guide roller 92. The axes of the first guide roller 91, the heating roller 93, and the second guide roller 92 are parallel to each other and staggered along the height direction. The first guide roller 91 and the second guide roller 92 are located above the heating roller 93, and the distance between the first guide roller 91 and the second guide roller 92 is smaller than the diameter of the heating roller 93, in order to increase the contact area between the composite fabric and the heating roller 93.

[0057] To prevent the composite fabric from shrinking and deforming after drying, the shaping device 10 includes a traction mechanism that pulls the composite fabric on both sides along the direction of travel of the composite fabric, and a hot air oven for drying the composite fabric.

[0058] In some embodiments, the above-mentioned equipment for producing wet fabrics further includes a second discharge device 13, which is located downstream of the drying device 9 and is used to unwind a third substrate. The third substrate and the composite fabric are then simultaneously fed into the setting device 10.

[0059] Preferably, an impregnation device is provided downstream of the second discharge device 13 for impregnating the third substrate.

[0060] This application also discloses a method for preparing composite fabrics, which uses the equipment described in the above embodiments and includes the following steps:

[0061] S1. The first substrate roll and the second substrate roll are unwound and discharged through the first discharge device. After passing through the first discharge device, the first substrate and the second substrate are overlapped and synchronously transported to the storage device. The storage device stores the first substrate and the second substrate and adjusts the tension.

[0062] S2. The first substrate and the second substrate are simultaneously introduced into the pretreatment device for impregnation, pre-coagulation and drying operations to adjust the humidity of the first substrate and the second substrate and improve the hydrophilicity of the materials.

[0063] S3. The first substrate enters the first coating device for coating to form an intermediate layer;

[0064] S4. The second substrate enters the rolling device to roll and remove air, and then enters the impregnation device to fully soak and increase humidity to prevent penetration during subsequent coating on the second substrate.

[0065] S5. One side of the second substrate is bonded to the intermediate layer on the first substrate, and then coated in the second coating device to form a surface layer on the other side of the second substrate, thus obtaining a semi-finished composite fabric.

[0066] S6. The semi-finished composite fabric is sequentially passed through a coagulation tank to solidify its surface layer, a washing tank for cleaning, a drying device for initial drying, a shaping device for widening and shaping and secondary drying, and a printing device for surface coating to obtain the finished composite fabric.

[0067] S7. The finished composite fabric is wound up using a winding device.

[0068] The equipment in this application is not limited to the application in the above-described preparation method, but can also be used for coating processes on single-layer substrates, including:

[0069] Operation 1: After the substrate is unwound by the first discharge device 1, it is stored and tension is adjusted by the storage device 2. Then, it enters the first impregnation tank 31 for water immersion, the pre-coagulation tank 32 for pre-coagulation, and the first ironing mechanism 33 for ironing the front and back sides to complete the humidity adjustment. Then, it passes through the first coating device 4 for coating, the coagulation tank 7 for curing, the water washing tank 8 for cleaning, the drying device 9 for preliminary drying, the shaping device 10 for shaping and secondary drying, and the printing device 11 for surface printing. Finally, it is wound up by the winding device 12.

[0070] Operation 2: After the substrate is unwound by the first discharge device 1, it is stored and tension is adjusted by the storage device 2. Then, it enters the first impregnation tank 31 for water immersion, the pre-coagulation tank 32 for pre-coagulation, and the first ironing mechanism 33 for ironing the front and back to complete the humidity adjustment. Next, it enters the roller pressing device 5 for roller pressing to remove air, the impregnation device 61 for full immersion, the second coating device 62 for coating, the coagulation tank 7 for curing, the water washing tank 8 for cleaning, the drying device 9 for preliminary drying, the shaping device 10 for shaping and secondary drying, and the printing device 11 for surface printing. Finally, it is wound up by the winding device 12.

[0071] Operation 3: The substrate is unwound and discharged through the second discharge device 13. After passing through the impregnation device, the substrate enters the shaping device 10 for shaping and drying, and the printing device 11 for surface printing. Finally, it is wound up by the winding device 12. Example 2

[0072] like Figure 1 As shown, based on Embodiment 1, this embodiment further discloses the following:

[0073] A first exposed guide roller 70 and a second exposed guide roller 71 are provided in the upper middle part of the solidification tank 7. The first exposed guide roller 70 and the second exposed guide roller 71 are distributed at intervals according to the conveying direction of the fabric.

[0074] The semi-finished product passes through several guide rollers 72 inside the solidification tank 7. At the same time, the first exposed guide roller 70 is located directly above the center position of two adjacent guide rollers 72, and the second exposed guide roller 71 is located directly above the center position of the remaining two adjacent guide rollers 72.

[0075] The semi-finished product passes through the guide roller 72 at the local root and then through the first exposed guide roller 70. The first exposed guide roller 70 exposes the semi-finished product to the air to accelerate solidification.

[0076] The semi-finished product, after passing through the first exposed guide roller 70, enters the solidification tank 7 through the guide roller 72, and then passes through the second exposed guide roller 71. Similarly, the second exposed guide roller 71 can also improve the solidification efficiency.

[0077] The semi-finished product after the second exposed guide roller 71 then enters the guide roller 72 inside the solidification tank 7. Finally, there is a discharge guide roller 73 on the top side of the solidification tank 7 near the washing tank 8, which allows the solidified semi-finished product to enter the washing tank 8.

[0078] Specifically, in this embodiment, the height of the first exposed guide roller 70 and the second exposed guide roller 71 is higher than the normal liquid level of the coagulation treatment liquid in the coagulation tank 7.

[0079] A swing arm 710 is hinged to the top of the solidification tank 7. The swing arm 710 is inclined. A second exposed guide roller 71 is located at the lower end of the swing arm 710 and the two are rotatably connected. A driver 711 is provided at the top of the solidification tank 7 and is hinged to the upper end of the swing arm 710. The driver 711 is inclined, and the inclination direction of the driver 711 is opposite to the inclination direction of the swing arm 710.

[0080] An exposed third roller 74 is provided behind the second exposed guide roller 71.

[0081] The above structural design allows the semi-finished product to come into intermittent contact with the coagulation liquid, thereby improving production efficiency. Example 3

[0082] like Figure 7 As shown, based on Embodiment 1, this embodiment further discloses the following:

[0083] Two adjacent heating rollers 93, namely the first guide roller 91 and the second guide roller 92, enclose an inverted triangular space 98. A C-shaped cylinder 94 is installed on the support of the drying device 9 in the space. The opening of the C-shaped cylinder 94 faces downward so that the heat emitted by the heating rollers 93 enters the C-shaped cylinder 94 through the opening. Heating wires are provided on the inner wall of the C-shaped cylinder 94. The outer wall of the C-shaped cylinder 94 is in tangential contact with the semi-finished product and has three contact points. A radial dimension adjustment mechanism is provided at the opening of the C-shaped cylinder 94. The radial dimension adjustment mechanism is used to adjust the diameter of the C-shaped cylinder 94. The C-shaped cylinder 94 is made of metal material and has a certain elastic deformation property.

[0084] The radial dimension adjustment mechanism includes a transversely arranged adjusting screw 95. One end of the adjusting screw 95 passes through one side of the C-shaped cylinder 94, and the other end of the adjusting screw 95 passes through the other side of the C-shaped cylinder 94. A nut 96 is provided on the adjusting screw 95. The nut 96 rotates relative to the adjusting screw 95 to adjust the diameter of the C-shaped cylinder 94 so that the C-shaped cylinder 94 contacts the semi-finished product.

[0085] That is, the heating roller 93 contacts one of the surfaces in the thickness direction of the semi-finished product, while the C-shaped cylinder 94 contacts the other surface in the thickness direction of the semi-finished product.

[0086] The C-shaped drum 94 can assist in heating and drying, and can reuse the dissipated heat to a certain extent to improve drying efficiency. It can also improve the tension of the semi-finished product after its length increases due to thermal expansion during the heating process.

[0087] Secondly, the heating temperature of the heating wire is equal to the heating temperature of the heating roller 93.

[0088] In addition, a fixed shaft is provided at the axial center of the C-shaped cylinder 94, and the fixed shaft is connected to the top of the inner wall of the C-shaped cylinder 94 by several vertical rods. This structure allows the C-shaped cylinder 94 to be fixed.

[0089] Finally, several sector-shaped baffles 97 are spaced apart on the fixed shaft. The sector-shaped baffles 97 form a barrier to prevent the collected heat from being lost from both ends of the C-shaped cylinder 94.

[0090] The outer diameter of the sector-shaped partition 97 is smaller than the inner diameter of the C-shaped cylinder 94.

[0091] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0092] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. An apparatus for producing wet-laid fabrics, characterized in that, The device includes, in sequence, a first discharge device (1), a storage device (2), a pretreatment device (3), a first coating device (4), a roller pressing device (5), an impregnation device (61), a second coating device (62), a coagulation tank (7), a washing tank (8), a drying device (9), a shaping device (10), a printing device (11), and a winding device (12). The first substrate roll and the second substrate roll are simultaneously conveyed by overlapping unwinding through the first discharge device (1). After storage and tension adjustment in the storage device (2), they enter the pretreatment device (3) to increase the humidity of the first substrate (14) and the second substrate (15) and improve the hydrophilicity of the first substrate (14) and the second substrate (15). The first substrate (14) and the second substrate (15) are separated after passing through the pretreatment device (3). The first substrate (14) enters the first coating device (4) to form an intermediate layer (16). The second substrate (15) enters the rolling device (5) to remove air and then enters the impregnation device (61) for immersion. The first substrate (14) and the second substrate (15) overlap and are connected through the intermediate layer (16). The second coating device (62) forms a surface layer (17) on the coating surface of the second substrate (15) to obtain a semi-finished product of composite fabric. The semi-finished composite fabric is solidified in the coagulation tank (7) and then washed in the washing tank (8). It is then dried in the drying device (9) and stretched in the setting device (10) and dried again. The finished composite fabric is then coated by the printing device (11) and wound up by the winding device (12).

2. The apparatus for producing wet-laid fabrics according to claim 1, characterized in that, The pretreatment device (3) includes a first impregnation tank (31), a pre-solidification tank (32), and a first ironing mechanism (33). The first impregnation tank (31) is used to soak the first substrate (14) and the second substrate (15). After passing through the pre-solidification tank (32), the first substrate (14) and the second substrate (15) enter the first ironing mechanism (33). The first ironing mechanism (33) is equipped with a plurality of heating rollers (34) to iron the first substrate (14) and the second substrate (15) in an overlapping state on both sides.

3. The apparatus for producing wet-laid fabrics according to claim 1, characterized in that, The first coating apparatus (4) includes a guiding mechanism for guiding the first substrate (14) and the second substrate (15) respectively, and a coating mechanism for coating the first substrate (14).

4. The apparatus for producing wet-laid fabrics according to claim 1, characterized in that, The roller pressing device (5) consists of several sets of roller pressing mechanisms. The roller pressing mechanism includes a support (51), a first roller (52), and a second roller (53). The shaft of the first roller (52) is rotatably connected to the support (51). The second roller (53) is movably connected to the support (51) so that the axis of the second roller (53) moves closer to or further away from the first roller (52). The first roller (52) and the second roller (53) cooperate to roll the second substrate (15).

5. The apparatus for producing wet-laid fabrics according to claim 1, characterized in that, An extrusion mechanism (63) is provided between the impregnation device (61) and the second coating device (62) to act on the second substrate (15). After passing through the extrusion mechanism (63), the second substrate (15) is bonded to the intermediate layer (16) on the first substrate (14) and enters the second coating device (62) simultaneously.

6. The apparatus for producing wet-laid fabrics according to claim 4, characterized in that, The washing tank (8) is provided with several sets of roller pressing mechanisms. The composite fabric alternately passes through the washing tank (8) and the roller pressing mechanism. A pressing device (81) for squeezing out excess water in the composite fabric is also provided between the washing tank (8) and the drying device (9).

7. The apparatus for producing wet-laid fabrics according to claim 6, characterized in that, The drying device (9) consists of several ironing mechanisms, each including a first guide roller (91), a second guide roller (92), and a heating roller (93). The composite fabric passes through the first guide roller (91), the heating roller (93), and the second guide roller (92) in sequence. The axes of the first guide roller (91), the heating roller (93), and the second guide roller (92) are parallel to each other and staggered along the height direction. The first guide roller (91) and the second guide roller (92) are located above the heating roller (93), and the distance between the first guide roller (91) and the second guide roller (92) is smaller than the diameter of the heating roller (93), which is used to increase the contact area between the composite fabric and the heating roller (93).

8. The apparatus for producing wet-laid fabrics according to claim 7, characterized in that, The shaping device (10) includes a traction mechanism that pulls the composite fabric on both sides along the direction of travel of the composite fabric, and a hot air oven for drying the composite fabric.

9. The apparatus for producing wet-laid fabrics according to claim 1, characterized in that, The equipment also includes a second discharge device (13), which is located downstream of the drying device (9) and is used to unwind the third substrate. The third substrate and the composite fabric are then combined and simultaneously enter the shaping device (10).

10. A method for preparing a composite fabric, using the equipment described in any one of claims 1-9, characterized in that, Includes the following steps: S1. The first substrate roll and the second substrate roll are unwound and discharged through the first discharge device. After passing through the first discharge device, the first substrate and the second substrate are overlapped and synchronously transported to the storage device. The storage device stores the first substrate and the second substrate and adjusts the tension. S2. The first substrate and the second substrate are simultaneously introduced into the pretreatment device for impregnation to adjust the hydrophilicity of the first substrate and the second substrate; S3. The first substrate enters the first coating device for coating to form an intermediate layer; S4. The second substrate enters the roller pressing device to remove air, and then enters the impregnation device to fully soak and increase humidity to prevent penetration during subsequent coating. S5. One side of the second substrate is bonded to the intermediate layer on the first substrate, and then enters the second coating device for coating, forming a surface layer on the other side of the second substrate, to obtain a semi-finished composite fabric. S6. The semi-finished composite fabric is sequentially passed through a coagulation tank to solidify its surface layer, a washing tank for cleaning, a drying device for initial drying, a shaping device for widening and shaping and secondary drying, and a printing device for surface coating to obtain the finished composite fabric. S7. The finished composite fabric is wound up using a winding device.

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