PTFE / para-aramid fiber composite woven filter cloth
The seamless cylindrical structure and fiber interlacing of the PTFE/para-aramid composite woven filter cloth solve the problem of PTFE filter cloth being prone to breakage in high-temperature corrosive environments, thereby improving strength and dirt holding capacity and extending service life.
Patent Information
- Application Number
- CN202423289634.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing PTFE filter cloths are prone to breakage when used in high-temperature and corrosive environments, have low strength, low dirt holding capacity, and thus short service life.
The filter cloth is woven into a seamless cylindrical filter using PTFE/para-aramid composite weaving technology. Para-aramid long and short fibers are interwoven with PTFE fibers to improve strength and dirt holding capacity, and reduce the number of backflushing and backwashing cycles.
It effectively prevents cracking at the seams, improves the strength and dirt holding capacity of the filter cloth, extends its service life, and enhances the stability of the backflushing and backwashing process.
Smart Images
Figure CN223914924U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of filter cloth technology, and in particular to a PTFE / para-aramid composite woven filter cloth. Background Technology
[0002] With the rapid development of industrial technology and the increasing demands for environmental and water resource protection, filtration technology and filter elements are indispensable in various fields, especially in industries such as chemical, petrochemical, power, metallurgy, food, and medical. These industries have complex operating conditions, and the substances that need to be filtered are often corrosive, and some even have high temperatures. Therefore, the requirements for the chemical properties, service life, filtration efficiency, and high temperature resistance of filter elements are becoming increasingly stringent.
[0003] PTFE filter cloth has excellent high temperature resistance and chemical corrosion resistance, and is mainly used in quick-clean and candle filters. However, it has problems such as low strength and low dirt holding capacity. During use, it is easy to break after repeated backwashing and backflushing, thus affecting its service life. Utility Model Content
[0004] The purpose of this invention is to disclose a PTFE / para-aramid composite woven filter cloth. The seamless cylindrical filter cloth has a continuous, seamless structure, which effectively avoids the filtration failure problem caused by seam breakage or leakage in traditional filter cloths during use. In addition, the introduction of para-aramid long fiber yarn and para-aramid short fiber yarn improves the strength and dirt holding capacity of the filter cloth, reduces the number of backflushing and backwashing times, and makes the filter cloth less prone to breakage during the backflushing and backwashing process, thus improving the filter cloth's performance and service life.
[0005] To achieve the above objectives, this utility model provides a PTFE / para-aramid composite woven filter cloth, which is a seamless cylindrical filter cloth woven from warp and weft yarns. The warp yarns are PTFE long fiber / para-aramid long fiber composite yarns, and the weft yarns are interwoven PTFE long fiber / para-aramid long fiber composite yarns and PTFE long fiber / para-aramid short fiber composite yarns.
[0006] In some embodiments, the warp yarn is made by twisting together PTFE long fiber yarn and para-aramid long fiber yarn, and the weft yarn is made by twisting together PTFE long fiber yarn and para-aramid long fiber yarn or para-aramid short fiber yarn.
[0007] In some embodiments, the twist of both the warp and weft yarns is 50-200 twists / m.
[0008] In some embodiments, the warp and weft densities of the seamless cylindrical filter cloth are both 100 yarns / 10cm to 320 yarns / 10cm.
[0009] In some embodiments, the linear density of both the warp and weft yarns is 100D-1500D.
[0010] In some embodiments, the diameter of the seamless cylindrical filter cloth is φ30mm-φ100mm.
[0011] In some implementations, the warp and weft yarns are woven using a plain weave, twill weave, or satin weave structure.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The PTFE / para-aramid composite woven filter cloth provided by this utility model has a continuous and seamless cylindrical filter cloth structure, which effectively avoids the filtration failure problem caused by the cracking or leakage at the seams of traditional filter cloth during use. In addition, due to the introduction of para-aramid long fiber yarn and para-aramid short fiber yarn, the strength and dirt holding capacity of the filter cloth are improved, the number of backflushing and backwashing of the filter cloth is reduced, the backflushing and backwashing process is not easy to break, and the use effect and service life of the filter cloth are improved. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of the PTFE / para-aramid composite woven filter cloth shown in this utility model;
[0014] Figure 2 This is a weft cross-sectional view of the PTFE / para-aramid composite woven filter cloth shown in this utility model;
[0015] Figure 3 The table shows the performance comparison parameters of the PTFE / para-aramid composite woven filter cloth and the single PTFE filter cloth shown in this utility model. Detailed Implementation
[0016] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.
[0017] like Figure 1-3 The PTFE / para-aramid composite woven filter cloth shown is a seamless cylindrical filter cloth woven from warp yarn 1, weft yarn 2, and weft yarn 3, with a diameter of φ90mm.
[0018] Seamless cylindrical filter cloth is woven using seamless weaving technology, featuring a continuous, seamless structure. This effectively avoids the filtration failure caused by seam breakage or leakage during the use of traditional filter cloth, greatly improving the performance and service life of seamless cylindrical filter cloth.
[0019] The warp yarn 1 is a PTFE long fiber / para-aramid long fiber composite yarn, the weft yarn 2 is a PTFE long fiber / para-aramid long fiber composite yarn, and the weft yarn 3 is a PTFE long fiber / para-aramid short fiber composite yarn.
[0020] The warp yarn 1 is made by plying and twisting PTFE long fiber yarn and para-aramid long fiber yarn; the weft yarn 2 is made by plying and twisting PTFE long fiber yarn and para-aramid long fiber yarn; and the weft yarn 3 is made by plying and twisting PTFE long fiber yarn and para-aramid short fiber yarn. Figure 1 As shown, weft yarns 2 and 3 are woven alternately as weft yarns. The warp yarns 1 and weft yarns 2 and 3 are woven using a plain weave structure.
[0021] The warp twist is 150 twists / m and the weft twist is 80 twists / m. The warp density is 244 threads / 10cm and the weft density is 98 threads / 10cm. The linear density of both the warp and weft yarns is 1000D. The filter cloth has a warp breaking strength greater than or equal to 10000N / 50mm and a weft breaking strength greater than or equal to 3000N / 50mm.
[0022] Combination Figure 3 It is known that, due to the high strength of para-aramid fibers and their good high temperature resistance and corrosion resistance, the addition of para-aramid fibers gives the seamless cylindrical filter cloth the characteristics of high strength, high wear resistance and excellent corrosion resistance, which greatly improves the service life of the seamless cylindrical filter cloth. In addition, the introduction of para-aramid short fiber yarn also increases the dirt holding capacity of the seamless cylindrical filter cloth and reduces the number of times the seamless cylindrical filter cloth needs to be backflushed and backwashed.
[0023] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.
[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A PTFE / p-aramid composite woven filter cloth, characterized in that, The seamless cylindrical filter cloth is woven by warp yarns and weft yarns, the warp yarns are PTFE long fiber / p-aramid long fiber composite yarns, and the weft yarns are interwoven by PTFE long fiber / p-aramid long fiber composite yarns and PTFE long fiber / p-aramid short fiber composite yarns.
2. The PTFE / p-aramid composite woven filter cloth according to claim 1, characterized in that, The warp yarns are ply-twisted by PTFE long fiber yarns and p-aramid long fiber yarns, and the weft yarns are ply-twisted by PTFE long fiber yarns and p-aramid long fiber yarns or p-aramid short fiber yarns.
3. The PTFE / p-aramid composite woven filter cloth according to claim 2, characterized in that, The twist of the warp yarns and the weft yarns is 50-200 twists per meter.
4. The PTFE / p-aramid composite woven filter cloth according to claim 3, characterized in that, The warp density and the weft density of the seamless cylindrical filter cloth are both 100-320 per 10 cm.
5. The PTFE / p-aramid composite woven filter cloth according to claim 4, characterized in that, The warp yarns and the weft yarns have a linear density of 100-1500 deniers.
6. The PTFE / p-aramid composite woven filter cloth according to claim 1, wherein, The diameter of the seamless cylindrical filter cloth is φ30-φ100 mm.
7. The PTFE / p-aramid composite woven filter cloth according to claim 1, wherein, The warp yarns and the weft yarns are woven by plain weave structure, twill weave structure or satin weave structure.