Process of forming a ripple-free structure from a polymerizable material that shrinks upon polymerization
Abstract
Abstract A PROCESS FOR CASTING A STRUCTURE HAVING AT LEAST ONE RIPPLE-FREE SURFACE FROM A POLYMERIZABLE MATERIAL THAT SHRINKS UPON POLYMERIZATION WHICH COMPRISES COATING A SUBSTANTIALLY SMOOTH CASTING SURFACE WITH A LIQUID COVERIN THE LIQUID COATED CASTING SURFACE WITH A FILM THAT SHRINKS AS THE POLYMERIZABLE MATERIAL SHRINKS, DEPOSITING THE POLYMERIZABLE MATERIAL ON THE FILM, AND POLYMERIZING THE POLYMERIZABLE MATERIAL. THE LIQUID IS APPLIED IN A MANNER SUCH AS TO FORM A CONTINUOUS LAYER BETWEEN THE CASTING SURFACE AND THE FILM WHICH WETS BOTH SURFACES, SO THAT THE SURFACE TENSION OF THE LIQUID WILL MAINTAIN THEM IN INTIMATE CONTACT WITHOUT INHIBITING LATERAL MOVEMENT OF THE FILM RELATIVE TO THE CASTING SURFACE. CONTINUOUS CASTING AND A PROCESS FOR CASTING STRUCTURES HAVING BOTH SURFACES RIPPLE FREE ARE ALSO PROVIDED FOR.
Inventors
- 👤 John G S Billingsley
- 👤 David E Nickles
Bibliographic Details
Claims Analysis
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