Wear-resistant polyester screen and preparation process thereof

Abstract

The invention discloses a wear-resistant polyester screen mesh and a preparation process, and relates to the technical field of polyester screen mesh preparation, the wear-resistant polyester screen mesh comprises a plurality of warps and wefts, the warps and the wefts are mutually staggered and alternately woven into a mesh body up and down, the surfaces of the warps and the wefts are coated with wear-resistant layers, and the wear-resistant layers are arranged on the surfaces of the warps and the wefts. And the wear-resistant layer is made of a polytetrafluoroethylene material. When the padding device is used for conducting surface padding coating treatment on the polyester screen, through transmission, the padding time of the conveyed and padded polyester screen in the padding box 2 can be adaptively controlled according to the thickness change of the polyester screen, the conveying and padding efficiency of the polyester screen with the low thickness can be guaranteed, and the conveying and padding efficiency of the polyester screen with the low thickness can be improved. And the padding effect on the thick polyester screen can be ensured.

Description

Technical Field

[0001] The invention relates to the technical field of polyester screen preparation and processing, in particular to a wear-resistant polyester screen and a preparation process. Background Art

[0002] Polyester screen is a screen made of polyester as the main raw material. It has excellent physical and chemical properties and is widely used in various industrial and civil fields such as screening, filtration, and isolation. Polyester screen relies on the comprehensive advantages of polyester material. As an efficient screening and filtration material in industrial and civil fields, its performance can be further optimized through raw material ratio and post-processing process to meet the needs of different scenarios.

[0003] During the processing and preparation of polyester screen, it is necessary to use a padding device to impregnate the wear-resistant coating liquid onto the surface of the polyester screen. During the impregnation process, different polyester screens have different thicknesses. When the thickness of the polyester screen increases, the pore path between the fiber layers becomes longer, and the resistance of the coating liquid to penetrate into the inner layer increases significantly. If the impregnation time is insufficient, the thick screen is prone to the "wet outside and dry inside" phenomenon, resulting in insufficient infiltration of the inner fiber layer, and the wear-resistant coating is only attached to the surface, which is easy to fall off during actual use. For this reason, we propose a wear-resistant polyester screen and a preparation process. Summary of the Invention

[0004] The object of the present invention is to provide a wear-resistant polyester screen and a preparation process to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a wear-resistant polyester screen, comprising a plurality of warps and wefts, the plurality of warps and wefts being intertwined and woven alternately up and down to form a mesh body, the surface of the warps and wefts being coated with a wear-resistant layer, and the wear-resistant layer being made of polytetrafluoroethylene.

[0006] A process for preparing a wear-resistant polyester screen comprises the following steps:

[0007] S1: Raw material pretreatment: selecting polyester filament as the base raw material, soaking the polyester filament in a sodium hydroxide solution with a temperature of 60-70°C and a concentration of 2-3% for 20-30 minutes, rinsing with clean water until neutral, and drying in a hot air environment at 80-90°C for 2-3 hours;

[0008] S2: Weaving forming, using a five-piece two-fly satin weaving method to weave the pretreated polyester filaments into a primary screen mesh. The warp tension during weaving is controlled at 8-12 cN and the weft tension is controlled at 6-10 cN.

[0009] S3: Surface coating treatment: prepare wear-resistant coating liquid, pass through a padding device, adopt a padding process, control the padding rate at 60-70%, and bake at 120-130°C for 15-20 minutes after padding treatment;

[0010] S4: Heat setting treatment: send the coated screen into the heat setting machine, set the temperature to 180-190℃, the time to 1-2 minutes, and apply a pressure of 0.2-0.3MPa during the heat setting process;

[0011] S5: Finishing: smooth the surface of the heat-set screen, cut it into the required size, and package it after passing the inspection.

[0012] Preferably, the impregnation device includes an impregnation box, the wear-resistant coating liquid is placed inside the impregnation box, a support assembly for supporting the polyester screen is provided inside the impregnation box, a conveying assembly for conveying the polyester screen is provided on the impregnation box, and a transmission assembly for adjusting the support state according to the thickness of the polyester screen is provided between the conveying assembly and the support assembly.

[0013] Preferably, the support assembly includes multiple groups of first support rollers rotatably connected to the inside of the immersion box, and each group of first support rollers is arranged in a horizontal arrangement state. A mounting frame is provided inside the immersion box, and multiple groups of second support rollers are rotatably connected to the mounting frame. The second support rollers are located above the first support rollers, and the adjacent first support rollers and second support rollers are arranged in a staggered state.

[0014] Preferably, two groups of the conveying components are symmetrically arranged on the front and rear sides of the padding box.

[0015] Preferably, the conveying assembly includes a mounting seat fixed to the upper side of the immersion box, a fixing frame is fixed on the mounting seat, a mounting shaft is rotatably connected to the fixing frame, a first conveying roller is fixed on the mounting shaft, a second conveying roller is arranged above the first conveying roller, the polyester screen passes between the first conveying roller and the second conveying roller, and an installation assembly for assisting the installation of the second conveying roller is arranged above the immersion box.

[0016] Preferably, the mounting assembly includes a strip plate arranged above the second conveyor roller, and a plurality of groups of mounting rods for auxiliary installation and fixation are arranged between the strip plate and the outer side of the immersion box. The strip plate is connected to a U-shaped frame through an elastic component, and a connecting shaft is rotatably connected to the U-shaped frame. The second conveyor roller is fixed on the connecting shaft, and the polyester screen conveyed between the first conveyor roller and the second conveyor roller is kept against the first conveyor roller and the second conveyor roller under the action of the elastic component.

[0017] Preferably, the elastic component includes multiple groups of sleeves fixed on the U-shaped frame, the sleeves are slidably connected with a sliding rod, one end of the sliding rod is fixed to the strip plate, and a spring is provided on the outer side of the sleeve, and the two ends of the spring are respectively arranged similarly to the U-shaped frame and the strip plate.

[0018] Preferably, the transmission assembly includes two groups of symmetrically arranged fixing rods fixed to the upper end of the mounting frame, and the fixing rods are connected and fixed to the U-shaped frame via a connecting plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] When the present invention uses a padding device to perform surface padding coating treatment on a polyester screen, the transmission can adaptively control the padding time of the conveyed and padded polyester screen inside the padding box 2 according to the thickness change of the polyester screen itself, thereby ensuring both the conveying and padding efficiency of the polyester screen with lower thickness and the padding effect of the polyester screen with thicker thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the polyester screen structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the polyester screen preparation process of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the padding device of the present invention;

[0024] Figure 4 Schematic diagram of the internal structure of the padding box of the present invention;

[0025] Figure 5 This is a schematic diagram of the support assembly structure of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the conveying assembly of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the installation component and the elastic component of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the transmission assembly of the present invention.

[0029] In the figure: 101, warp; 102, weft; 2, dipping box; 301, first support roller; 302, mounting frame; 303, second support roller; 401, mounting seat; 402, fixing frame; 403, mounting shaft; 404, first conveyor roller; 405, second conveyor roller; 501, mounting rod; 502, strip plate; 503, U-shaped frame; 504, connecting shaft; 601, sleeve; 602, slide rod; 603, spring; 701, fixing rod; 702, connecting plate. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1

[0032] See also Figure 1 The wear-resistant polyester screen shown in the figure includes a plurality of warps 101 and wefts 102. The warps 101 and wefts 102 are intertwined and woven into a mesh body alternately. The surfaces of the warps 101 and wefts 102 are coated with a wear-resistant layer, and the wear-resistant layer is made of polytetrafluoroethylene.

[0033] Example 2

[0034] See also Figure 2 The process for preparing a wear-resistant polyester screen shown in the figure includes the following steps:

[0035] S1: Raw material pretreatment: polyester filament is selected as the basic raw material, and the polyester filament is placed in a sodium hydroxide solution with a temperature of 60-70°C and a concentration of 2-3% for 20-30 minutes, rinsed with clean water until neutral, and dried in a hot air environment at 80-90°C for 2-3 hours;

[0036] S2: Weaving forming, using a five-piece two-fly satin weaving method to weave the pretreated polyester filaments into a primary screen mesh. The warp tension during weaving is controlled at 8-12 cN and the weft tension is controlled at 6-10 cN.

[0037] S3: Surface coating treatment: prepare wear-resistant coating liquid, pass through a padding device, adopt a padding process, control the padding rate at 60-70%, and bake at 120-130°C for 15-20 minutes after padding treatment;

[0038] S4: Heat setting treatment: send the coated screen into the heat setting machine, set the temperature to 180-190℃, the time to 1-2 minutes, and apply a pressure of 0.2-0.3MPa during the heat setting process;

[0039] S5: Finishing: smooth the surface of the heat-set screen, cut it into the required size, and package it after passing the inspection.

[0040] Example 3

[0041] See also Figure 3-Figure 8 The padding device shown in the figure includes a padding box 2, the wear-resistant coating liquid is placed inside the padding box 2, a support assembly for supporting the polyester screen is provided inside the padding box 2, a conveying assembly for conveying the polyester screen is provided on the padding box 2, and a transmission assembly for adjusting the support state according to the thickness of the polyester screen is provided between the conveying assembly and the support assembly;

[0042] It should be noted here that when the polyester screen is subjected to surface padding coating treatment using a padding device, the transmission can be used to adaptively control the padding time of the transported and padded polyester screen in the padding box 2 according to the thickness change of the polyester screen itself, thereby ensuring both the transport and padding efficiency of the lower thickness polyester screen and the padding effect of the thicker thickness polyester screen.

[0043] Preferably, the support assembly includes multiple groups of first support rollers 301 rotatably connected to the inside of the padding box 2, each group of first support rollers 301 is arranged in a horizontal arrangement state, and a mounting frame 302 is provided inside the padding box 2. Multiple groups of second support rollers 303 are rotatably connected to the mounting frame 302. The second support rollers 303 are located above the first support rollers 301, and adjacent first support rollers 301 and second support rollers 303 are arranged in a staggered state.

[0044] It should be noted here that: the polyester screen is passed through each group of first support rollers 301 and second mounting rollers 304 in turn. After the polyester screen is passed through, one end of the polyester screen is passed through the first support roller 301 and the second support roller 303 of the conveying assembly on the other side of the immersion box 2 to complete the conveying connection of the polyester screen on the immersion box 2. After the polyester screen is conveyed and connected, the polyester screen is pulled by an external pulling component. During the pulling process, the polyester screen is supported by the first support roller 301 and the second mounting roller 304, so that the polyester screen passes through the wear-resistant coating liquid of the immersion box 2 in a wound state.

[0045] Preferably, two groups of conveying components are symmetrically arranged on the front and rear sides of the padding box 2;

[0046] It should be noted here that the stability of the polyester screen conveying is ensured by two sets of conveying components.

[0047] Preferably, the conveying assembly includes a mounting base 401 fixed to the upper side of the padding box 2, a fixing frame 402 is fixed to the mounting base 401, a mounting shaft 403 is rotatably connected to the fixing frame 402, a first conveying roller 404 is fixed to the mounting shaft 403, a second conveying roller 405 is provided above the first conveying roller 404, the polyester screen passes between the first conveying roller 404 and the second conveying roller 405, and a mounting assembly for assisting in the installation of the second conveying roller 405 is provided above the padding box 2;

[0048] It should be noted here that: one end of the polyester screen to be padded is first passed between the first support roller 301 and the second support roller 303 of the conveying assembly on one side of the immersion box 2. After one end of the polyester screen passes through, the one end of the polyester screen is inserted into the wear-resistant coating liquid of the immersion box 2. In the process of one end of the polyester screen entering, the polyester screen is sequentially passed between each group of first support rollers 301 and second mounting rollers 304. After the polyester screen passes through, one end of the polyester screen is passed between the first support roller 301 and the second support roller 303 of the conveying assembly on the other side of the immersion box 2 to complete the conveying connection of the polyester screen on the immersion box 2. After the polyester screen is conveyed and connected, the polyester screen is pulled by an external pulling component. During the pulling process, the polyester screen is supported by the first support roller 301 and the second mounting roller 304, so that the polyester screen passes through the wear-resistant coating liquid in the immersion box 2 in a wound state.

[0049] It is worth noting here that the pulling component is a conventional pulling component, and its working principle and operation method are regarded as the prior art in this application and will not be elaborated here.

[0050] Preferably, the mounting assembly includes a strip plate 502 disposed above the second conveyor roller 405, a plurality of mounting rods 501 for auxiliary installation and fixation are disposed between the strip plate 502 and the outer side of the padding box 2, a U-shaped frame 503 is connected to the strip plate 502 via an elastic component, a connecting shaft 504 is rotatably connected to the U-shaped frame 503, the second conveyor roller 405 is fixed on the connecting shaft 504, and the polyester screen conveyed between the first conveyor roller 404 and the second conveyor roller 405 is kept against the first conveyor roller 404 and the second conveyor roller 405 under the action of the elastic component;

[0051] It should be noted that the strip plate 502 , the mounting rod 501 and the U-shaped frame 503 facilitate the installation and connection between the second conveying roller 405 and the padding box 2 .

[0052] Preferably, the elastic component includes multiple sets of sleeves 601 fixed on the U-shaped frame 503, and a slide rod 602 is slidably connected to the sleeve 601. One end of the slide rod 602 is fixed to the strip plate 502. A spring 603 is sleeved on the outer side of the sleeve 601, and the two ends of the spring 603 are respectively arranged similarly to the U-shaped frame 503 and the strip plate 502.

[0053] It should be noted here that: the sleeve 601 and the slide rod 602 facilitate the telescopic connection between the auxiliary U-shaped frame 503 and the strip plate 502, and the spring 603 facilitates the squeezing and pushing of the U-shaped frame 503, and through the pushing action, the second conveying roller 405 on the U-shaped frame 503 is offset from the polyester screen.

[0054] Preferably, the transmission assembly includes two sets of symmetrically arranged fixing rods 701 fixed to the upper end of the mounting frame 302, and the fixing rods 701 are connected and fixed to the U-shaped frame 503 via a connecting plate 702;

[0055] It should be noted here that: through the counteraction between the second support roller 303 and the first support roller 301 and the polyester screen, the height of the second support roller 303 rises and falls synchronously with the thickness of the polyester screen during the transportation of the polyester screen. When the thickness of the transported polyester screen becomes thicker, the polyester screen pushes the second support roller 303 to force the second support roller 303, the connecting shaft 504 and the U-shaped frame 503 to move upward. During the upward movement of the U-shaped frame 503, the connection between the connecting plate 702 and the fixed rod 701 drives the mounting frame 302 to rise synchronously.

[0056] In this scheme, a padding device is used to perform surface padding coating treatment on a polyester screen, including the following steps:

[0057] One end of the polyester screen to be padded is first passed between the first support roller 301 and the second support roller 303 of the conveying assembly on one side of the padding box 2. After one end of the polyester screen passes through, the one end of the polyester screen is inserted into the wear-resistant coating liquid inside the padding box 2. In the process of the one end of the polyester screen invading, the polyester screen is sequentially passed between each group of first support rollers 301 and second mounting rollers 304. After the polyester screen passes through, one end of the polyester screen is passed through the first support roller 301 and the second mounting roller 303 of the conveying assembly on the other side of the padding box 2. The polyester screen passes through the support rollers 303 to complete the transportation connection of the polyester screen on the padding box 2. After the polyester screen is transported and connected, the polyester screen is pulled by an external pulling component. During the pulling process, the polyester screen is supported by the first support roller 301 and the second installation roller 304, so that the polyester screen passes through the wear-resistant coating liquid in the padding box 2 in a wound state. As the polyester screen passes through the wear-resistant coating liquid, the wear-resistant coating adheres to the surface of the polyester screen, completing the surface padding coating treatment of the polyester screen.

[0058] When the polyester screen is conveyed and subjected to surface padding and coating treatment, the elastic force of the elastic component on the U-shaped frame 503 is used to push the second support roller 303 on the U-shaped frame 503 and the first support roller 301 on the mounting frame 302 respectively against the upper and lower sides of the polyester screen. The second support roller 303 and the first support roller 301 are offset against the polyester screen, so that during the conveying process of the polyester screen, the height of the second support roller 303 is synchronously raised and lowered as the thickness of the polyester screen changes. When the thickness of the conveyed polyester screen becomes thicker, the polyester screen pushes the second support roller 303 against the second support roller, so that the second support roller 303, the connecting shaft 504 and the U-shaped frame 503 are forced to move upward. During the upward movement of the U-shaped frame 503, the mounting frame 302 is driven to rise synchronously through the connection between the connecting plate 702 and the fixing rod 701. By the upward movement of the mounting frame 302, the spacing between the second support roller 303 and the first support roller 301 is increased. By increasing the gap, the conveying distance of the polyester screen between each group of the second support roller 303 and the first support roller 301 is increased during the conveying process. By increasing the conveying distance, the polyester screen with increased thickness can be immersed in the wear-resistant coating liquid of the impregnation box 2 for a longer time, ensuring that the inner fiber layer is fully infiltrated and the wear-resistant coating is fully impregnated, thereby ensuring the effect of the impregnation of the surface coating of the polyester screen. During the entire conveying and impregnation process, by changing the conveying and impregnation thickness and transmitting, the conveying and impregnating polyester screen can be adaptively controlled according to the thickness change of the polyester screen itself. It can ensure both the conveying and impregnation efficiency of the lower thickness polyester screen and the impregnation effect of the thicker thickness polyester screen.

[0059] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant polyester screen, comprising a plurality of warp threads (101) and weft threads (102), wherein the plurality of warp threads (101) and weft threads (102) are interlaced and woven alternately up and down to form a mesh body, and the surfaces of the warp threads (101) and weft threads (102) are coated with a wear-resistant layer, wherein the wear-resistant layer is made of polytetrafluoroethylene.

2. A process for preparing a wear-resistant polyester screen, which is used for processing and preparing the wear-resistant polyester screen as claimed in claim 1, characterized in that: The following steps are involved: S1: Raw material pretreatment: selecting polyester filament as the base raw material, soaking the polyester filament in a sodium hydroxide solution with a temperature of 60-70°C and a concentration of 2-3% for 20-30 minutes, rinsing with clean water until neutral, and drying in a hot air environment at 80-90°C for 2-3 hours; S2: Weaving forming, using a five-piece two-fly satin weaving method to weave the pretreated polyester filaments into a primary screen mesh. The warp tension during weaving is controlled at 8-12 cN and the weft tension is controlled at 6-10 cN. S3: Surface coating treatment: prepare wear-resistant coating liquid, pass through a padding device, adopt a padding process, control the padding rate at 60-70%, and bake at 120-130°C for 15-20 minutes after padding treatment; S4: Heat setting treatment: send the coated screen into the heat setting machine, set the temperature to 180-190℃, the time to 1-2 minutes, and apply a pressure of 0.2-0.3MPa during the heat setting process; S5: Finishing: smooth the surface of the heat-set screen, cut it into the required size, and package it after passing the inspection.

3. The process for preparing a wear-resistant polyester screen according to claim 2, characterized in that: The padding device comprises a padding box (2), the wear-resistant coating liquid is placed inside the padding box (2), a support assembly for supporting the polyester screen is provided inside the padding box (2), a conveying assembly for conveying the polyester screen is provided on the padding box (2), and a transmission assembly for adjusting the support state according to the thickness of the polyester screen is provided between the conveying assembly and the support assembly.

4. The process for preparing a wear-resistant polyester screen according to claim 3, characterized in that: The support assembly comprises a plurality of groups of first support rollers (301) rotatably connected to the interior of a padding box (2), each group of the first support rollers (301) being arranged in a transverse arrangement state, a mounting frame (302) being provided inside the padding box (2), a plurality of groups of second support rollers (303) being rotatably connected to the mounting frame (302), the second support rollers (303) being located above the first support rollers (301), and adjacent first support rollers (301) and second support rollers (303) being arranged in a staggered state.

5. The process for preparing a wear-resistant polyester screen according to claim 4, characterized in that: The conveying components are symmetrically arranged in two groups on the front and rear sides of the padding box (2).

6. The process for preparing a wear-resistant polyester screen according to claim 5, characterized in that: The conveying assembly comprises a mounting seat (401) fixed to the upper side of a padding box (2); a fixing frame (402) is fixed on the mounting seat (401); a mounting shaft (403) is rotatably connected to the fixing frame (402); a first conveying roller (404) is fixed on the mounting shaft (403); a second conveying roller (405) is arranged above the first conveying roller (404); the polyester screen passes between the first conveying roller (404) and the second conveying roller (405); and a mounting assembly for assisting the installation of the second conveying roller (405) is arranged above the padding box (2).

7. The process for preparing a wear-resistant polyester screen according to claim 6, characterized in that: The mounting assembly comprises a strip plate (502) arranged above the second conveying roller (405); a plurality of mounting rods (501) for auxiliary mounting and fixing are arranged between the strip plate (502) and the outer side of the padding box (2); a U-shaped frame (503) is connected to the strip plate (502) via an elastic component; a connecting shaft (504) is rotatably connected to the U-shaped frame (503); the second conveying roller (405) is fixed on the connecting shaft (504); and the polyester screen conveyed between the first conveying roller (404) and the second conveying roller (405) is kept against the first conveying roller (404) and the second conveying roller (405) under the action of the elastic component.

8. The process for preparing a wear-resistant polyester screen according to claim 7, characterized in that: The elastic component includes multiple sets of sleeves (601) fixed on the U-shaped frame (503), a slide rod (602) is slidably connected to the sleeve (601), one end of the slide rod (602) is fixed to the strip plate (502), and a spring (603) is sleeved on the outer side of the sleeve (601), and the two ends of the spring (603) are respectively arranged similarly to the U-shaped frame (503) and the strip plate (502).

9. The process for preparing a wear-resistant polyester screen according to claim 8, characterized in that: The transmission assembly comprises two groups of symmetrically arranged fixing rods (701) fixed to the upper end of the mounting frame (302), and the fixing rods (701) are connected and fixed to the U-shaped frame (503) via a connecting plate (702).

Images