System and method for making polyethylene terephthalate sheets and objects
AssigneeChemlink Capital Ltd.
InventorNicholas P. Barakat
Life of this patent
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Abstract
A system for making PET objects including a means for reacting a first PET precursor and a second PET precursor to produce a PET melt; a means for flowing the PET melt to a valve having at least two outlets; a means for flowing the PET melt from at least one of the at least two outlets to at least one distribution manifold, each of the at least one distribution manifold having at least two distribution lines; a means for controlling individually the mass flow of the PET melt in each of the at least two distribution lines independently of the other of the at least two distribution lines; and a means for forming the PET objects from the PET melt.
Claims16
A method for reducing intermediate processing steps for making PET objects comprising:
- reacting a first PET precursor and a second PET precursor to produce a PET melt in a reactor;
- flowing said PET melt to a valve having at least two outlets;
- flowing said PET melt from at least one of said at least two outlets to at least one distribution manifold, each of said at least one distribution manifold having at least two distribution lines;
- controlling the residence time in each of the at least two distribution lines for controlling the acetaldehyde content in said PET melt,
- providing a first pump configured to control the residence time, the first pump located between the valve and the reactor;
- controlling individually the mass flow of the PET melt in each of said at least two distribution lines independently of the other of said at least two distribution lines;
- providing a second and third pump, the second and third pump configured to control the residence time in each of the at least two distribution lines, the second pump located between the at least one distribution manifold and a first forming die, the third pump located between the at least one distribution manifold and a second forming die;
- controlling a first speed of the first pump responsive to a first and second pressure at the second and third pump respectively;
- and
- forming said PET objects from said PET melt with the first and second forming die.
A method for reducing intermediate processing steps for making PET objects comprising:
- reacting a first PET precursor and a second PET precursor to produce a PET melt in a reactor;
- flowing said PET melt to a valve having at least two outlets;
- flowing said PET melt from at least one of said at least two outlets to at least one distribution manifold, each of said at least one distribution manifold having at least two distribution lines;
- controlling the residence time in each of the at least two distribution lines for controlling the acetaldehyde content in said PET melt,
- providing a first pump configured to control the residence time, the first pump located between the valve and the reactor;
- controlling individually the mass flow of the PET melt in each of said at least two distribution lines independently of the other of said at least two distribution lines;
- providing a second and third pump, the second and third pump configured to control the residence time in each of the at least two distribution lines, the second pump located between the at least one distribution manifold and a first forming die, the third pump located between the at least one distribution manifold and a second forming die;
- compensating for a change of speed in one of the at least two distribution lines with the second and third pump, wherein a pressure control logic controls the compensating;
- forming said PET objects from said PET melt with the first and second forming die.
Dependencies are inferred from the claim text.