Abstract: A multi-layer film having an intermediate layer containing, as a main component, a mixture of two kinds of specific linear low density polyethylenes, and innermost and outermost layers containing, as a main component, a mixture of a specific high pressure process polyethylene, a specific ethylene-.alpha.-olefin copolymer and a specific linear low density polyethylene. The film has an automatic packaging machine applicability and an excellent heat sealability at low temperatures without defects such as lowering of tuck in property, stretchability in the transverse direction and film slipping property and blocking, and is suitably employed as films for stretch packaging and shrink packaging which are used for prepackaging of retailed goods, mainly foods.

Abstract: A method of using coal for reducing iron ore in a fluidized bed to obtain a reduced iron comprising fluidizing and pylolysis of a fine coal in a first fluidized bed, fluidized and thermal cracking the vapored material from the first fluidized bed in a second fluidized bed to deposit carbon on the surface of iron ore particles, fluidizing and reducing the iron ore in a third fluidized bed using reducing gas from generator.