Patent ID: 7361252
Filing Date: 2008-04-22
Classification: B32B,G02F,Y10T

Abstract:
1. A method for laminating a suspended particle device (SPD) film which comprises: (a) forming a suspended particle device film comprising a cured SPD emulsion having a plurality of uncrosslinked droplets of a liquid light valve suspension distributed therein; (b) positioning said suspended particle device film within an unlaminated stack of components for forming a laminated suspended particle device film, said stack comprising at least one hot melt adhesive sheet or film contacting an outer surface of said suspended particle device film; (c) subjecting said unlaminated stack to at least a partial vacuum; (d) preheating said unlaminated stack of components under said vacuum for a time and at a temperature selected to permit at least partial degassing of said stack; and (e) applying a sufficient net pressure to said stack at a sufficient temperature and for a sufficient time to produce a laminated suspended particle device film from the unlaminated stack, and wherein the method further comprises substantially preventing contact between the hot melt adhesive, when the adhesive is heated, and said cured SPD emulsion of said suspended particle device film and any protrusions of the cured SPD emulsion extending outwardly from said film, said contact being prevented by interposing a substantially chemically inert plastic material adjacent an outer edge portion of said suspended particle device film at a location chosen to substantially prevent contact of said hot melt adhesive, when the adhesive is heated, with the cured SPD emulsion of said film.