Abstract: Powder including low molecular weight polytetrafluoroethylene having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C., having a melt viscosity of 1×102 to 7×105 Pa·s at 380° C., having an average particle size of 1.0 to 50 ?m, and containing 30 or more carboxyl groups at ends of the molecule chain per 106 carbon atoms in the main chain, wherein the powder is substantially free from C8-C14 perfluorocarboxylic acids and salts thereof.

Abstract: The present invention relates to a can for canning equipped with an easily openable closure having an inside resin film layer with excellent corrosion resistance and hot water resistance. The easily openable closure consists of an aluminum substrate having a score formed so as to reach halfway in the thickness direction of the aluminum substrate, an inside surface material of a crystalline thermoplastic resin film having a tensile strength of 3 to 25 kg/mm.sup.2 provided on that surface of the aluminum substrate which faces the inside surface of the can, a layer of an adhesive and/or an adhesion promoting agent interposed between the substrate and the inside surface material and bonding the substrate and the inside surface material with an adhesion strength of at least 3 kg/15 mm width, and a layer of an epoxy-type thermosetting resin film containing a lubricant applied to the surface of the inside surface material.