Preparation method of modified polypropylene melt-blown filter element

• Main Authors: MAO ZHONGQUN, GUO YAOSHEN, RUAN YUSHENG, LIN CHUN'ER, CHEN CHENG, ZHU YONGDING
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2022
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

A preparation method of a modified polypropylene melt-blown filter element is characterized by comprising the following steps: (1) preparation of a polypropylene melt-blown filter element: uniformly mixing polypropylene with an additive introduced with a modification site, pouring into a charging barrel, extruding the raw materials by an extruder, drawing into filaments under the traction of hot air at the temperature of 200-300 DEG C, then winding and cutting on a receiving rod, and thus obtaining the polypropylene melt-blown filter element; and (2) amination modification of the polypropylene melt-blown filter element: putting the polypropylene melt-blown filter element into a polyamine modified solution, heating under a water bath condition to initiate amination modification of the polypropylene filter element, and cleaning and drying to obtain the modified polypropylene melt-blown filter element. Modification sites are introduced in the melt-blowing process of the PP filter element to lay a foundation for