Heat shrinkable end caps
AssigneeShaw Industries Ltd.
InventorsRobert E. Steele, Peter Jackson, Marcus P. W. Heydrich
Life of this patent
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Abstract
Heat-shrinkable cap comprising a heat-shrinkable tube sealed at one end by heat recovering that end of tube over a dimensionally stable, solid plug. The tube and plug are mutually weldable under heat, or are bonded together, thereby providing an air and water-tight seal at the sealed end. The open end of the cap may be internally coated with adhesive to provide an air and water-tight seal over an object such as a cable-end when the cap is heat recovered over said object.
Claims25
A heat shrinkable end cap comprising a dimensionally heat unstable tubular member of crosslinked polymeric material, said member shrinking in perimeter on application of heat thereto, and having one end heat recovered to a small perimeter relative to an opposite open end of large perimeter, said one end being closed by a discrete plug of polymeric material that tends not to yield under pressure applied by shrinking polymeric material at said one end and upon application of said heat and is welded to said one end, said plug having a complex viscosity greater than 10.sup.9 poise when measured at a temperature of 23.degree. C. and a strain rate of 10.sup.-1 radian s.sup.-1.
A heat shrinkable end cap comprising a dimensionally heat unstable tubular member of crosslinked polymeric material, said member being capable of shrinking in perimeter on heating above a temperature at which shrinkage of said member commences, and having one end heat recovered to a small perimeter relative to an opposite open end of large perimeter, said one end being closed by a discrete solid plug that is infusible at a temperature above said temperature at which shrinkage commences and having a complex viscosity greater than 10.sup.9 poise when measured at a temperature of 23.degree. C. and a strain rate of 10.sup.-1 radian s.sup.-1, and that is bonded to said one end.
Dependencies are inferred from the claim text.