Preparation method of PPs (polyphenylene sulfite) composite punched felt membrane filter material
A film-coated filter material and composite needle technology, which is applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve the problems of poor tolerance, poor anti-oxidation performance, and low energy consumption.
Active Publication Date: 2014-08-20
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to provide a method for preparing a high-efficiency and long-life PPs composite needle-punched felt-coated filter material with the advantages of oxidation resistance, high filtration efficiency, and low energy consumption, so as to effectively solve the problem of pure PPs commonly used in the market. Needle felt has poor oxidation resistance and poor tolerance to harsh working conditions, improving the filtration efficiency and service life of PPs needle felt filter material
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] 1. Felt making: Select PPs fiber and chemical fiber such as PTFE or P84. After fine opening and loosening, they will be carded by a carding machine, and then the fiber layer will be spread on the base fabric by a web-laying machine. Finally, pre-needling and main needling will be mixed. The fiber layer is firmly connected with the PPs base cloth to make a plain felt, singeing and pressing one side of the plain felt for use. The fiber ratio of PPs composite needle felt is as follows:
[0013] Table 1 Fiber ratio of PPs composite needle felt (%)
[0014] Example serial number 1 2 3 4 5 6 7 8 9 PPs 60 65 70 75 80 85 90 95 100 P84 15 0 0 0 5 15 10 0 0 PTFE 0 20 0 25 10 0 0 5 0 NO 0 5 30 0 0 0 0 0 0 PE 25 10 0 0 0 0 0 0 0
[0015] 2. Surface treatment: PTFE emulsion (code name PTFE, solid content 65%), acrylate emulsion (code name PA), waterproofing agent (brand name TG410), coupling ...
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Abstract
The invention relates to a preparation method of a PPs (polyphenylene sulfite) composite punched felt membrane filter material. The preparation method is characterized by comprising the following steps of: coating mixed fiber formed by mixing PPs fiber and chemical fiber onto the upper surface and the lower surface of PPs base cloth and punching to form a blank felt, carrying out surface treatment with a surface treating agent, and carrying out high-temperature hot-pressing and coating on the blank felt and a PTFE (Polytetrafluoroethylene) film to form the PPs composite punched felt membrane filter material. In the mixed fiber, the percentage by weight of the PPs fiber is 60-85 percent, and the balance is the chemical fiber; and the surface treating agent is prepared form the following components in percentage by weight: 1-5 percent of acrylic ester, 2-15 percent of tetrafluorine emulsion, 1-8 percent of waterproofing agent, 1-12 percent of coupling agent, 1-5 percent of antioxidant and the balance of water. According to the PPs composite punched felt membrane filter material prepared by adopting the method, the filtering efficiency to dust below 1mum can reach 99.99 percent, the filter material blockage brought by deep filtering of the PPs composite punched felt filter material can be avoided, the filtering resistance of a system can be effectively reduced, and the deashing frequency is reduced. Due to the comprehensive overlying of the of two effects, the service life of the PPs composite punched felt membrane filter material is greatly shorted compared with the common PPs punched felt filter material.
Description
technical field [0001] The invention relates to the improvement of the preparation process of PPs composite needle-punched felt film-coated filter material used in power plants and chemical industries, in particular to a preparation method of PPs composite needle-punched felt film-coated filter material, Background technique [0002] PPs (polyphenylene sulfide) is a crystalline high-performance thermoplastic engineering plastic with many properties such as heat resistance, chemical resistance, and flame retardancy. It can be used continuously at a temperature of 190°C, and can be used at a temperature of 200°C instantaneously (accumulatively less than 400 hours per year). It has good anti-sulfur and anti-acid effects, and is currently widely used in domestic power plants. However, PPs fiber also has its fatal shortcomings. PPs fiber has poor oxidation resistance and requires O 2 Content less than 14% (Vol), NOx less than 600mg / Nm 3 , the higher the oxygen content, the lowe...
Claims
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IPC IPC(8): B32B37/06B32B37/10B32B38/18B01D39/14D06M15/256D06M15/263D06M101/30
Inventor 范凌云徐涛费传军周诚何青匡新波宋尚军白耀宗
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD