Plastic and nonmetallic article shaping or treating: processes – Treating shaped or solid article – To remove entrained material from article
Patent
1991-05-16
1993-05-04
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Treating shaped or solid article
To remove entrained material from article
264 63, 264340, B29C 7100, C04B 4181
Patent
active
052079686
ABSTRACT:
A essentially solvent-free green sheet (or "card") of fine powder particles of frit held together with an organic binder containing an essentially water-insoluble thermoplastic synthetic resin can be dimensionally stabilized by a process which utilizes the physical interaction of aquathermic stimuli on the green card. The process includes contacting the card with liquid water or moisture-saturated air or inert gas (which gas, like water, has no noticeable chemical action on the organic binder) at a temperature in the range from about the freezing point (0.degree. C.) to about the boiling point of water (100.degree. C.) and drying the card until essentially all the moisture from within the pores of the cards is removed before the cards are circuitized with metallurgy. The green cards which are then essentially free of both moisture and solvent, are allowed to equilibrate at storage temperature for a period of at least about 10 minutes before being processed further.
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DiMilia Robert A.
Phelps Frankie E.
Valchar Clement E.
Aluminum Company of America
Derrington James
Lobo Alfred D.
Pearce-Smith David W.
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