1
Daniel N Levy, Fabrice Aubertin: Paste extrusion method. E I du Pont de Nemours and Company, January 16, 2001: US06174473 (17 worldwide citation)

The present invention relates to a process of paste extruding lubricated PTFE fine powder in an extrusion device by forcing the lubricated PTFE fine powder through the extrusion device and out of an orifice as a lubricated green extrudate, wherein before exiting through the orifice, the direction of ...


2
Fabrice Aubertin, Daniel N Levy: Continuous paste extrusion method. E I du Pont de Nemours and Company, October 12, 1999: US05965074 (14 worldwide citation)

Paste extrusion of lubricated PTFE fine powder is carried out by using the extrusion head of the extruder as the ram for forcing the powder through the extrusion orifice in the extrusion head, i.e. the extrusion head is moved against the powder, whether in particle form or preform form, to cause the ...


3
D N Levy, F Aubertin: Paste extrusion method. E I Du Pont de Nemours And Co, cui yaobeng, September 13, 2000: CN98808098

The present invention relates to a process of paste extruding lubricated PTFE fine powder in an extrusion device (41) forcing the lubricated PTFE fine powder through the extrusion device (41) and out of an orifice as a lubricated green extrudate, wherein before exiting through the orifice, the direc ...


4
Levy Daniel N, Aubertin Fabrice: Paste extrusion method. Ei Du Pont de Nemours And Company, sTOCKER Edwin, February 18, 1999: WO/1999/007538

The present invention relates to a process of paste extruding lubricated PTFE fine powder in an extrusion device (41) forcing the lubricated PTFE fine powder through the extrusion device (41) and out of an orifice as a lubricated green extrudate, wherein before exiting through the orifice, the direc ...


5
Levy Daniel N, Aubertin Fabrice: Paste extrusion method. Du Pont, May 24, 2000: EP1001873-A1

The present invention relates to a process of paste extruding lubricated PTFE fine powder in an extrusion device (41) forcing the lubricated PTFE fine powder through the extrusion device (41) and out of an orifice as a lubricated green extrudate, wherein before exiting through the orifice, the direc ...


6
Kawai Hitoshi: Mold and method for producing polytetrafluoroethylene preform. Nippon Valqua, October 26, 1993: JP1993-278056

PURPOSE: To prevent a product from changing in physical properties or being ununiformized in shape in a part corresponding to upper and lower end faces of a preform to increase a capacity in one molding cycle by coating at least either an upper mold molding surface or a lower mold molding surface wi ...