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US 7,855,237 B2Granted
Plant for the manufacture of polymer particles
AssigneeSulzer Chemtech AG
InventorPhilip Nising
Life of this patent
Estimating the term…
Abstract
The method for the manufacture of foamed or foamable polymer particles employs a mixture of a polymer melt and a recycled polymer melt produced from recycled, propellant-containing polymer particles. The associated plant for the manufacture of the foamed or foamable polymer particles is provided with an apparatus for the processing of recycled, propellant-containing polymer particles.
Claims5
A plant for the manufacture of foamed or foamable polymer particles comprising
- a side extruder for processing recycled propellant-containing foamable polymer particles;
- a heating means for the production of a recycling polymer melt from the recycled propellant-containing polymer particles in said extruder;
- a degasification apparatus for the degasification of the recycling polymer melt in said extruder;
- a first mixing apparatus for mixing of the recycling polymer melt to produce an essentially homogenous recycled polymer melt;
- at least one of a polymerisation plant having a reactor and a degasification apparatus for the manufacture of a polymer melt and a melting apparatus for the manufacture of a polymer melt by melting of polymer granulate;
- a supply apparatus for metering a propellant into the polymer melt;
- a second mixing apparatus for mixing the polymer melt and propellant;
- a cooling apparatus for cooling the propellant-containing polymer melt;
- and
- a third mixing apparatus for mixing the homogeneous recycled polymer melt and propellant-containing polymer melt to obtain a homogeneous polymer melt with a homogeneous distribution of propellant.
7 more elements
A plant for the manufacture of foamable or foamed polymer particles comprising
- an extruder for melting recycled propellant-containing foamable polymer particles to form a recycling polymer melt;
- a degasification apparatus for degasification of said recycling polymer melt;
- a first mixing apparatus for mixing of the recycling polymer melt to produce an essentially homogenous recycled polymer melt;
- a melting apparatus for melting a polymer granulate to form a polymer melt;
- a supply apparatus for metering a propellant into the polymer melt;
- a second mixing apparatus for mixing the polymer melt and propellant;
- a cooling apparatus for cooling the propellant-containing polymer melt;
- and
- a third mixing apparatus for mixing the homogeneous recycled polymer melt and propellant-containing polymer melt to obtain a homogeneous polymer melt with a homogeneous distribution of propellant.
6 more elements
Dependencies are inferred from the claim text.