Production process of edge-reinforced forming net for papermaking

Abstract

The invention discloses an edge-reinforced papermaking forming net production process, which comprises four core procedures of raw material preparation, weaving, edge structure treatment and post-treatment: in the aspect of raw materials, polyester fibers are selected as a main body, and a composite material formed by mixing pretreated aramid fibers and polytetrafluoroethylene fibers according to a preset mass ratio is adopted as an edge; special glue is matched; during weaving, the main body is woven by a conventional process, the edge part adopts an interlocking process, the number of layers is gradually increased, and meanwhile, the warp and weft interweaving mode and tension are strictly controlled; transition areas of the edge parts and the middle part are thickened gradually, so that smooth thickness transition is realized; sealing and curing the edge part in a post-treatment stage, and ensuring the strength and wear resistance of a finished product through quality detection. According to the technology, through targeted material selection, a special weaving mode and edge strengthening treatment, the durability of the edge of the forming net is greatly improved, the production technology is optimized, and support is provided for high-efficiency and high-quality papermaking production.

Description

Technical Field

[0001] This invention relates to the field of papermaking, and more particularly to a production process for an edge-reinforced forming wire for papermaking. Background Technology

[0002] In existing technologies, forming wires for papermaking are key components of the wet end of papermaking machines, playing a crucial role in paper forming and dewatering. However, in actual production processes, existing forming wires for papermaking have many problems.

[0003] First, edge wear is one of the most prominent problems. During the operation of the paper forming wire, its edges come into frequent contact with the papermaking equipment, and under the influence of high-speed operation and the scouring of the pulp, the edges bear significant friction and mechanical stress. For example, in some high-speed papermaking machines, the edges of the forming wire are prone to wear, fraying, and even breakage due to long-term friction with components such as guide rollers and doctor blades. Once the warp or weft threads at the edges wear and break, the woven structure will loosen, causing the forming wire to fail to meet the needs of papermaking, leading to frequent replacements of the forming wire, increasing production costs and downtime.

[0004] Secondly, some existing formed meshes have shortcomings in the structural design and manufacturing process of their edges. Traditional formed mesh manufacturing processes often focus on overall strength and filtration performance, while neglecting the reinforcement of the edges. For example, using conventional weaving techniques and materials without optimizing for the special stress conditions of the edges results in the edges having lower strength and wear resistance compared to the center, making them a weak link in long-term use.

[0005] Furthermore, from a production efficiency perspective, the edge is prone to damage, leading to a shorter lifespan for the forming wire and requiring more frequent replacements. This not only increases labor costs but also reduces the effective operating time of the paper machine, impacting overall paper production efficiency. Moreover, frequent wire replacements may cause fluctuations in paper quality, as newly replaced wires may differ in performance from the old ones, requiring time for adjustment and adaptation. During this period, issues such as uneven paper thickness and poor surface smoothness may occur.

[0006] In summary, the existing problems with paper forming wires in terms of edge abrasion resistance, structural design, and production process have become important factors restricting the efficient and high-quality production of the paper industry. There is an urgent need for a paper forming wire production process that can effectively enhance edge performance to solve these problems. Summary of the Invention

[0007] This application provides a production process for an edge-reinforced forming wire for papermaking, which solves the problems of edge damage and process deficiencies in existing forming wires, thus restricting efficient and high-quality papermaking production.

[0008] The technical solution adopted in this application is as follows.

[0009] A manufacturing process for edge-reinforced forming wire for papermaking includes raw material preparation, weaving process, edge structure treatment, and post-processing steps, as follows: S1. Raw material preparation: The main material is polyester fiber; the edge composite material is made by mixing aramid fiber and polytetrafluoroethylene fiber in a preset mass ratio. The two fibers are pretreated before mixing; special adhesive with good adhesion, wear resistance and water resistance is prepared. S2. Weaving process: Polyester fibers are woven using conventional weaving technology to form the main body of the shaped net. The edge is woven using an interlocking weaving process to form the edge composite material. During weaving, the interlacing method and tension of the warp and weft threads are controlled, and the number of edge weaving layers is gradually increased. S3. Edge structure treatment: The transition area between the edge and the middle is gradually thickened. The amount of fiber filling is adjusted according to the preset thickness change curve by the fiber filling equipment to achieve a smooth thickness transition from the edge to the middle. S4. Post-processing: Use special adhesive to seal the edges, control the application speed and amount of adhesive to ensure that the adhesive is evenly applied and penetrates between the warp and weft threads. After the adhesive is applied, let it air dry or bake to cure. Finally, conduct quality tests on the finished product, such as strength and abrasion resistance.

[0010] As a further improvement to the above technical solution: The mass ratio of aramid fiber to polytetrafluoroethylene fiber in the edge composite material is 3:2.

[0011] In the interlocking weaving process, the weft and warp threads are interwoven in a three-up, three-down manner, and the tension of the warp and weft threads is kept stable by a tension control system.

[0012] During the edge weaving process, an additional layer of weaving is added every 10 centimeters until the preset edge thickness is reached.

[0013] In the gradual thickening process, within a preset range from the edge, the amount of fiber filling is gradually reduced by controlling the discharge speed of the fiber filling equipment.

[0014] The pretreatment includes removing fiber impurities and surface activation treatment to improve the bonding force between aramid fibers and polytetrafluoroethylene fibers.

[0015] A type of forming wire for papermaking with reinforced edge section.

[0016] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. Extended service life: By employing new composite materials, special weaving techniques, thickened edge structures, and post-sealing treatment, the abrasion resistance and strength of the formed mesh edges are significantly improved. The adhesive sealing treatment effectively isolates factors that may damage the warp and weft threads, reducing frequent replacements due to edge damage and lowering production costs.

[0017] 2. Improved production efficiency: Due to the extended service life of the forming wire, the number of times the papermaking machine needs to be replaced is reduced, and the effective operating time is increased.

[0018] 3. Improved Paper Quality: Stable edge performance of the forming wire ensures its stability and uniformity during the papermaking process, reducing paper quality fluctuations caused by edge problems. For example, paper thickness uniformity is significantly improved, paper surface smoothness is enhanced, paper defects and breaks are reduced, and overall paper quality is improved.

[0019] 4. Reduced maintenance costs: The extended lifespan of the forming wire not only reduces the procurement cost of the forming wire but also lowers the labor and maintenance costs required for its replacement. Simultaneously, improved paper quality reduces the defect rate, further lowering production costs and improving the company's economic efficiency. Detailed Implementation

[0020] This application provides a production process for an edge-reinforced forming wire for papermaking, which solves the problems of edge damage and insufficient process in existing forming wires, thus restricting efficient and high-quality papermaking production.

[0021] The technical solution in this application embodiment is to solve the above problems, and the overall idea is as follows: To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the instruction manual and specific implementation methods.

[0022] Raw material preparation Main material: High-quality polyester fiber is selected as the main material for the forming wire, as it has good flexibility, corrosion resistance, and dimensional stability, meeting the basic performance requirements of the forming wire in the papermaking process. Prepare an appropriate amount of polyester fiber according to the required specifications and performance of the forming wire.

[0023] Edge composite material: Aramid fibers and polytetrafluoroethylene fibers are prepared in a certain proportion. For example, aramid fibers and polytetrafluoroethylene fibers are mixed at a mass ratio of 3:2. The two types of fibers are first pretreated to remove impurities and undergo surface activation treatment to improve their bonding strength. Then, the two types of fibers are thoroughly and uniformly mixed using specialized fiber mixing equipment to produce the composite material required for the edge.

[0024] Adhesive preparation: Select an adhesive suitable for the edge treatment of the formed mesh. This adhesive should have good adhesion, abrasion resistance, and water resistance. Prepare an appropriate amount of adhesive according to the size of the formed mesh and the edge treatment requirements.

[0025] Weaving process Main body weaving: Using conventional weaving equipment and processes, polyester fibers are woven to form the main body of the shaped web. During the weaving process, parameters such as weaving density and tension are controlled to ensure the uniformity and stability of the main body.

[0026] Edge Weaving: For edge weaving, switch to a weaving device with interlocking weaving function. Install the prepared edge composite material onto the weaving device and weave according to a specific interlocking weaving pattern. During the weaving process, precisely control the interlacing method and tension of the warp and weft threads. For example, when each weft thread interlaces with a warp thread, a three-up-three-down interlocking method is used, and the tension control system maintains the tension of the weft and warp threads, ensuring a tight edge structure and uniform strength. Simultaneously, during the edge weaving process, gradually increase the number of weaving layers to achieve a thickened edge design. Starting from the beginning, add one layer of weaving every certain length until the preset edge thickness is reached.

[0027] Edge structure treatment Gradual Thickening Treatment: After the edge weaving is completed, a gradual thickening treatment is applied to the transition area between the edge and the center. A special fiber filling device is used to gradually increase the fiber filling amount in the transition area according to a preset thickness change curve, resulting in a smooth thickness transition from the edge to the center. For example, within the range of the edge, the fiber filling amount is gradually reduced by controlling the discharge speed of the fiber filling device, thereby achieving a gradual thickness change from the edge to the center.

[0028] Post-processing Sealing process: Fix the woven mesh onto the gluing equipment and adjust the equipment parameters, such as gluing speed and amount. Ensure the glue is evenly applied to the edges of the mesh. During the gluing process, closely monitor the glue penetration to ensure it fully penetrates between the warp and weft threads, effectively locking them in place. After gluing, allow the mesh to air dry at room temperature or bake it at a specific temperature to allow the glue to fully cure.

[0029] Quality Inspection: A comprehensive quality inspection is conducted on the finished edge-reinforced forming wire for papermaking. Inspection items include edge and body strength, abrasion resistance, thickness uniformity, and dimensional stability. For example, an electronic universal testing machine is used to test the tensile strength of the edges and body, an abrasion resistance tester is used to test the abrasion resistance of the edges, and a thickness gauge is used to measure the thickness uniformity of the forming wire. Products that do not meet quality standards are adjusted or scrapped accordingly.

[0030] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0031] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A production process for an edge-reinforced forming wire for papermaking, characterized in that, The process includes raw material preparation, weaving, edge treatment, and post-processing. The specific steps are as follows: S1. Raw material preparation: The main material is polyester fiber; the edge composite material is made by mixing aramid fiber and polytetrafluoroethylene fiber in a preset mass ratio. The two fibers are pretreated before mixing; special adhesive with good adhesion, wear resistance and water resistance is prepared. S2. Weaving process: Polyester fibers are woven using conventional weaving technology to form the main body of the shaped net. The edge is woven using an interlocking weaving process to form the edge composite material. During weaving, the interlacing method and tension of the warp and weft threads are controlled, and the number of edge weaving layers is gradually increased. S3. Edge structure treatment: The transition area between the edge and the middle is gradually thickened. The amount of fiber filling is adjusted according to the preset thickness change curve by the fiber filling equipment to achieve a smooth thickness transition from the edge to the middle. S4. Post-processing: Use special adhesive to seal the edges, control the application speed and amount of adhesive to ensure that the adhesive is evenly applied and penetrates between the warp and weft threads. After the adhesive is applied, let it air dry or bake to cure. Finally, conduct quality tests on the finished product, such as strength and abrasion resistance.

2. The production process of the edge-reinforced forming wire for papermaking as described in claim 1, characterized in that, The mass ratio of aramid fiber to polytetrafluoroethylene fiber in the edge composite material is 3:

2.

3. The production process of the edge-reinforced forming wire for papermaking as described in claim 1, characterized in that, In the interlocking weaving process, the weft and warp threads are interwoven in a three-up, three-down manner, and the tension of the warp and weft threads is kept stable by a tension control system.

4. The production process of the edge-reinforced forming wire for papermaking as described in claim 1, characterized in that, During the edge weaving process, an additional layer of weaving is added every 10 centimeters until the preset edge thickness is reached.

5. The production process of the edge-reinforced forming wire for papermaking as described in claim 1, characterized in that, In the gradual thickening process, within a preset range from the edge, the amount of fiber filling is gradually reduced by controlling the discharge speed of the fiber filling equipment.

6. The production process of the edge-reinforced forming wire for papermaking as described in claim 1, characterized in that, The pretreatment includes removing fiber impurities and surface activation treatment to improve the bonding force between aramid fibers and polytetrafluoroethylene fibers.

7. An edge-reinforced forming wire for papermaking prepared using the production process described in any one of claims 1-6.