Abstract: An open-cell cross-linked polyolefin foam possessing extremely high non-flammability is produced by dispersing a thermally expansible graphite in an adhesive agent and applying the resultant adhesive agent mixture to at least part of the surface of a flame-retardant open-cell cross-linked polyolefin foam. As the flame-retardant open-cell cross-linked polyolefin foam, an open-cell cross-linked polyolefin foam which possesses a polymer of a phosphorus type flame-retarding agent in the interior and the surface of the open-cell foam or an open-cell cross-linked polyolefin foam which contains a halogen type flame-retarding agent in the cell membranes thereof and possesses a polymer of a phosphorus type flame-retarding agent in the interior and the surface of the open-cell foam is preferably used.

Abstract: A notebook for addresses comprises a base plate folded in two, a plurality of paper slips for records, each paper slip being folded in two at a substantially central transverse line so as to form front and rear flaps, said paper slips being steppedly arranged and attached to the base plate, and a cover having two pockets into which both end portions of the base plate are inserted. Preferably the cover has a transparent flap portion for showing therethrough indices printed to the end of the paper slip.