Abstract: In a heat shrinkable synthetic resin cover adapted to seal a joint between two pipes or an electric cable, the cover is made of a rectangular sheet shaped cross-linked polymer and a flexible electric heater covered by a cross-linked polymer contained in a heat shrinkable synthetic resin member such that the electric heater crosses at right angles an inherent direction of heat shrink of the member so as not prevent inherent heat shrink thereof.

Abstract: A heat shrinkable synthetic resin cover is made of a rectangular sheet shaped cross-linked polymer. A flexible electric heater covered by a cross-linked polymer is contained in a heat shrinkable synthetic resin member so that the electric heater crosses at right angles to an inherent direction of heat shrink of the member so as not to prevent inherent heat shrink thereof. Further, a pair of tongues are provided along each end edge of the heat shrinkable synthetic resin member. When the cover is applied to seal a joint between two pipes or electric cables, the tongues on the opposite end edges are superposed one upon another to interconnect both end edges of the cover.

Abstract: Finely divided ethylene polymer particles having a smooth surface and regular spherical configuration are prepared by a method in which an ethylene polymer, an organic solvent for the polymer and water are charged into a vessel, the charge is stirred to mix the organic solvent, water and ethylene polymer, the charge is heated to a temperature at which the ethylene polymer is completely dissolved in the organic solvent, so as to form an organic solvent solution of the ethylene polymer mixed with water, the charge is cooled and, then, the mixture of organic solvent and water is evaporated away from the charge so as to allow the ethylene polymer to deposit in the form of finely divided particles from the charge.