Abstract: A full automatic operation system for an injection molding machine which is capable of smoothly and automatically starting the purge and start-up operations and then beginning to produce the completely molded products after the barrel, mold and hydraulic fluid are heated to their optimum temperatures, respectively, automatically stopping the molding operation in case that continuous production of incomplete molded products or an abnormal condition in the molding machine occurs during the automatic operation and automatically restarting the operation after the stop.

Abstract: In a metal mold exchanging apparatus for use in an injection molding machine of the type wherein a metal mold is exchanged, there are provided a metal mold loading and unloading unit including a pair of metal mold supporting plates which are vertically spaced with a predetermined distance therebetween and an elevator for simultaneously raising and lowering the metal mold supporting plates for rendering the height of each one of the metal mold supporting plates to be equal to the height of position at which the metal mold is exchanged.

Abstract: A process for producing an oriented composite polyolefin resin film which comprises melt-laminating a polyolefin resin sheet for a paper-like layer on at least one surface of a monoaxially stretched polyolefin resin sheet for a substrate layer, and then stretching the resulting laminated sheet in a direction perpendicular to said monoaxially stretched direction. The polyolefin resin sheet for the substrate layer is a sheet of composite structure prepared by melt-extruding the specific compositions (A), (B), and (C) through a co-extrusion die in such a manner that a layer composed of the thermoplastic resin composition (A) is laminated on one surface of an intermediate layer composed of the polyolefin composition (B) containing a filler and a layer composed of the thermoplastic resin composition (C) is laminated on the other surface of the intermediate layer. Said polyolefin resin sheet for the paper-like layer is composed of a specific polyolefin composition (D) containing a filler.

Abstract: A water-soluble coating composition adapted for imparting appropriate printing, especially off-set printing, and processing characteristics to a thermoplastic resin film to be used as a synthetic paper and a coated film prepared with the composition are provided. The coating composition comprises (A) 100 parts by weight of a water-soluble polymer containing tertiary or quaternary nitrogen, (B) 5 to 75 parts by weight of a water-soluble polyaminepolyamideepichlorohydrin adduct, and (C) 5 to 100 parts by weight of a water-soluble polyimine compound.