Abstract: A process for making a multilayered formable plastic composite laminate and a process for its manufacture which includes preparing an acrylic composition which includes the reaction product of a mixture of predominantly an acrylic monomer and a substantially lesser amount of a polymer thereof, at least one free radical reaction initiating reaction catalyst, and optionally, a chain length regulating agent or a cross-linking agent; deaerating the acrylic composition; casting the deaerated acrylic composition upon a sheet or laminate of a thermoplastic material; and curing the cast acrylic composition in several successive stages so as to substantially polymerize the acrylic monomer and to permit penetration of the acrylic composition preferably to a depth of between about 0.001-0.

Abstract: Sheets of plastic materials including glass are interconnected along a longitudinal outer dimension thereof by an elongated longitudinal female interconnecting member having an upstanding base with transverse legs extending on opposite sides thereof and a central longitudinal socket therein having an open top with a downwardly extending prong receptacle which extends longitudinally the entire length of the socket. The female interconnecting member is adapted to mate with a male interconnecting member having an upstanding longitudinal housing with transverse support members extending from opposite sides thereof and having a downwardly extending bayonet prong centrally located in and integral with the housing extending longitudinally the length of the housing.