B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/663
B29C 67/20 (2006.01) B29C 44/10 (2006.01) C08J 9/10 (2006.01)
Patent
CA 1224614
"PROCESS FOR THE PRODUCTION OF EXPANDED RETICULATED PO LYETHYLENE" Abstract of the Disclosure Process for the production of expanded reticulat- ed polyethylene, comprising the steps of: - to melt an ethylene polymer selected among ethylene homopolymers, ethylene copolymers with alpha-olefins, copolymers of ethylene with conjugated diolefins, and related mixtures; - to homogenize said ethylene polymer, in the molten state, with a reticulating agent and an expanding a- gent, until a homogeneous mixture is obtained; - to give to said homogeneous mixture a solid paralle- lepiped shape by means of extrusion and subsequent cooling, or by means of moulding; - to place the solid parallelepiped shaped body inside an air-tightly closed container; to pressurize the con tainer by an inert gas and to heat the parallelepiped shaped body to a temperature higher than the decompo- sition temperature of the reticulating agent and of the expanding agent contained therein; in the absence, or in the substantial absence of expansion; - to depressurize the container, allowing the shaped bo dy to expand to an end volume smaller than the volume of the container; to recover the expanded reticulated item from the con tainer.
465304
Gargani Luciano
Quintavalle Saverio
Agip Petroli S.p.a.
Industria Italiana Petroli S.p.a.
Robic Robic & Associes/associates
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