Main equipment and instruments High-shear dispersing emulsifier, FM200, Shanghai Fluke Electromechanical Equipment Co.Keywords: polytetrafluoroethylene (PTFE); solid glass beads (SGM); silane coupling agent; mechanical properties; crystallinity Chinese Library Classification Number: TQ325., Ltd.4 Document Identification Code: A Article Number: 1001-5922 (2013) 10-0063-05 High-performance sealing material is an indispensable functional material in the aerospace field PTFE coated fiberglass tape .

SGM is a solid glass sphere with a tiny diameter, which is made by pulverizing glass and firing at high temperature. The results show that KH550 improves the compatibility of SGM particles with PTFE resin; with the increase of SGM content, the tensile properties and crystallinity of the sealing material decrease, and the Shore D hardness and compression recovery performance increase.

PTFE has excellent chemical resistance, high and low temperature resistance, aging resistance, and low friction.; Silane coupling agent, KH550, Nanjing Pinning Coupling Agent Co. Company; Acetone, analytical grade, Tianjin Tianda chemical reagent..; Environmental Scanning Electron Microscope (SEM), Quanta 200, FEI Hong Kong Co.1 Main raw materials Polytetrafluoroethylene resin, JF-4TM, Zhejiang Jusheng Fluorochemical Co. The influence of crystallization properties. In this paper, the surface activation treatment of SGM with silane coupling agent (KH550) is used to obtain modified solid glass beads. It is widely used in many civilian fields such as petroleum, chemical, electrical and medical [4-6]; but its smaller frequency Elasticity and poor creep resistance hinder its application in high-precision sealing areas., Ltd.

Abstract: The surface activation treatment of solid glass beads (SGM) with silane coupling agent KH550, and the preparation of SGM/PTFE sealing materials, analyzed the surface morphology of SGM before and after activation treatment, and examined the influence of SGM content on the mechanics of the sealing material Performance impact.; Plate vulcanizing press, QLB-D400\u0026times;40\u0026times;2, Xi'an Machine Tool Accessories Factory; High-temperature test chamber, WG-4501, Chongqing Yinhe Experimental Instrument Co., Ltd.

The SGM/PTFE sealing material is prepared by cold pressing sintering process, and the effect of SGM content on the mechanical properties of SGM/PTFE sealing material is studied. The rapid development of the defense industry has greatly promoted the development of high-performance sealing materials [1～3].; Solid glass beads, S-300, Qinhuangdao Qinhuang Glass Bead Co.; Differential Scanning Calorimeter, Q1000, American TA Company; Electronic Universal Testing Machine, CMT3502, Shenzhen New Sansi Metrology Technology Co., Ltd. Due to the characteristics of high roundness, good hardness, and strong wear resistance, it has been widely used in the fields of plastic rubber, wear-resistant floors, shot blasting and rust removal [7-9]. 

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