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AssigneesB.R.I.C. (Burea de Recherche pour l'Innovation et la Convervence, N.V. Anciens Etablissements Alsberge et Van Oost
InventorsPhilippe E. Gravisse, Jacques F. Van Schoote
Estimating the term…
Sheet materials are provided which are photoluminescent by virtue of their coating. These sheet materials comprise a textile or other flexible sheet material substrate to which adheres a coating layer consisting of one or more synthetic resins admixed with a photoluminescent complex, the latter comprising (a) a phosphorescent metal sulphide such as zinc, calcium, cadmium or strontium sulphide and (b) a first substance which absorbs energy of short wavelength and emits it within the absorption spectrum of the said sulphide and with or without (c) a second substance which is fluorescent and which imparts to the said sheet materials a daytime coloration different from their nighttime coloration. The sheet materials may be textile sheet materials useful for the production of garments, in particular safety garments and furnishing fabrics. Self-adhesive materials may also be produced.
A photoluminescent flexible sheet material having an enhanced premability to water vapor comprising:
A photoluminescent flexible sheet material comprising
A method of producing a photoluminescent flexible sheet material having an enhanced permeability to water vapor which comprises applying to a flexible substrate of sheet material a coating of a composition comprising at least one synthetic resin compatible with said substrate, said composition having dispersed therethrough (a) particles of at least one phosphorescent metal sulphide and (b) an organic substance which absorbs radiant energy of short wavelengths and emits the energy on a wavelength lying within the absorption spectrum of said phosphorescent metal sulphide said particles (a) and said substance (b) forming a photoluminescent complex having enhanced stability to ultraviolet energy and atmospheric moisture.
Dependencies are inferred from the claim text.