Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including application of internal fluid pressure to hollow...
Patent
1990-07-31
1991-12-17
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including application of internal fluid pressure to hollow...
264 65, 264320, 264553, B29C 3902, B29C 4900
Patent
active
050733303
ABSTRACT:
A method of molding polysilazane which includes heating a liquid sheet composed of liquid polysilazane alone or containing not more than 30 wt. % of a ceramic powder or a ceramic precursor to form a highly viscous sheet having a viscosity coefficient of 10.sup.4 to 10.sup.6 poise, fitting the highly viscous sheet to a forming mold, and heating to set the sheet. According to the method of the invention, molded bodies are easily obtained which have relatively uniform thickness, and are excellent in transferability, homogeneous and show less defects.
REFERENCES:
patent: 4395460 (1983-07-01), Gaul
patent: 4689382 (1987-08-01), Lebrun et al.
Smith Principles of Materials Science and Engineering (1986).
Nishio Hiroaki
Sato Michitaka
Watanabe Keiji
Fiorilla Christopher A.
Lowe James
NKK Corporation
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