Specification PTFE Gasket Glass Fiber PTFE Gasket,PTFE Seal Gasket ,White PTFE Gasket,Black PTFE Nylon Gasket ZHENJIANG CHUNHUAN SEALING MATERIALS CO.,LTD(GROUP) , http://www.chsealing.com
Apparent density: 2.10~2.30g/cm3
Tensile strength: 15.0Mpa
Ultimate elongation: 150%
PTFE is principally used as a gasket material because of it's capability to remain unaffected by the majority of chemicals used in industry. It is also classified, in most cases, as a food grade material, making it acceptable to both medical and food production industries. There are three basic types of PTFE Gasket materials. Virgin PTFE , filled PTFE and expanded PTFE .Features
Acid and alkali resistant
Chemical resistant
Has minimum friction coefficient of all know pure material
Non-viscous, no aging
Now molds can be made according to customers requirements.
Virgin PTFE is by far the least expensive of the three varieties, and is used in most general applications. Filled PTFE is a gasket material with a virgin PTFE base to which a substance is added during manufacture to improve the sealing characteristics of PTFE . This "filler" usually is glass or graphite particles although ceramics has sometimes been used. The resulting gasket material is strong, yet highly compressible with very good, though not universal, chemical resistance.
Expanded PTFE is virgin PTFE to which a stress resistance has been added by means of molecular rearrangement during manufacture. This process ensures that the molecular chains from which the PTFE is constructed, do not arrange themselves into set patterns. This means that expanded PTFE possesses no structural weakness (grain) and expands and contracts equally in all directions. Because no additives are required, expanded PTFE also possesses the unique chemical resistance of virgin PTFE.
Introduce several double cylindrical positioning fixtures
As is well known, V-shaped blocks are one of the most widely used typical positioning components in machine tool fixtures. However, the processing technology and assembly processability of the V-shaped block are not very good. Not only the manufacturing cycle is long, the accuracy is difficult to ensure, the technical requirements for the mounting adjustment are also high, and the use of the V-shaped block as the positioning component fixture is difficult to be compact in structure. Therefore, research on replacing V-shaped blocks with simple and easy positioning components has become a problem that the mechanical manufacturing industry needs to solve.