. . . "The fillers for use in the invention may be surface-treatedwith any known coupling agents (e.g., silane coupling agents, titanate coupling agents, etc.) or any other surface-treating agents.Glass fibers for use in the invention may be coated with a thermoplastic resin such as ethylene/vinyl acetate copolymer or the like, or with a thermosetting resin such as epoxy resin or the like, or may be bund" .