Polymer intrinsic viscosity control
First Claim
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1. IN A POLYMERIZATION SYSTEM FOR PRODUCING FIBER-FORMING POLYETHYLENE TEREPHTHALATE POLYESTER, A CONTROL APPARATUS FOR AUTOMATICALLY CONTROLLING POLYMERIC INTRINSIC VISCOSITY OF THE FIBER-FORMING POLYETHYLENE TEREPHTHALATE POLYESTER DURING ITS POLYCONDENSING REACTION STAGES, COMPRISING:
- A. A MINI-COMPUTER, THE CONFIGURATION OF WHICH CONSIST OF A CENTRAL PROCESSOR, A MULTIPLE WORD DISK, A TELETYPE, ANALOG INPUTS, ANALOG OUTPUTS, A REAL TIME CLOCK, CONTACT CLOSURES AND A WATCHDOG TIMER, B. FEEDING AND STORING MEANS FOR FEEDING AND STORING AN ANTICIPATORY CONTROL PROGRAM IN SAID MINICOMPUTER, C. GENERATING MEANS FOR GENERATING SAMPLED DATA INPUTS FROM EACH REACTOR OF PRESSURE, AGITATOR SPEED, INLET AND OUTLET MELT VISCOSITY, INLET AND OUTLET TEMPERATURE, AND PUMP SPEED, D. GENERATING MEANS FOR GENERATING ANALOG SAMPLED INPUTS OF PHYSICAL REPRESENTATIONS OF REACTOR PRESSURE, AGITATOR SPEED, INLET AND OUTLET MELT VISCOSITY, INLET AND OUTLET TEMPERATURE, AND PUMP SPEED, E. STORING MEANS FOR STORING SAID ANALOG SAMPLED INPUT, F. PROCESSING MEANS FOR PROCESING SAID ANALOG SAMPLED INPUTS BY RELATING SAID SAMPLED INPUTS TO SAID ANTICIPATORY CONTROL PROGRAM, AND G. CONTROLLING MEANS FOR CONTROLLING SAID POLYMER INTRINSIC VISCOSITY DURING ITS POLYCONDENSING REACTION STAGES WITHIN PREDETERMINED LIMITS OF SAID ANTICIPATORY CONTROL PROGRAM, THE INTRINSIC VISCOSITY OF THE FIBER-FORMING POLYESTER BEING CONTROLLED WITHIN $ 0.005 UNITS.
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Abstract
A computer control system for controlling polymeric intrinsic viscosity of polyethylene terephthalate polyester during its polycondensing stages by utilizing a software system configured and interrelated with a hardware system in such a manner wherein it is capable of initiating process changes which is capable of producing a predetermined intrinsic viscosity polymer during the polycondensation reaction stages.
8 Citations
2 Claims
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1. IN A POLYMERIZATION SYSTEM FOR PRODUCING FIBER-FORMING POLYETHYLENE TEREPHTHALATE POLYESTER, A CONTROL APPARATUS FOR AUTOMATICALLY CONTROLLING POLYMERIC INTRINSIC VISCOSITY OF THE FIBER-FORMING POLYETHYLENE TEREPHTHALATE POLYESTER DURING ITS POLYCONDENSING REACTION STAGES, COMPRISING:
- A. A MINI-COMPUTER, THE CONFIGURATION OF WHICH CONSIST OF A CENTRAL PROCESSOR, A MULTIPLE WORD DISK, A TELETYPE, ANALOG INPUTS, ANALOG OUTPUTS, A REAL TIME CLOCK, CONTACT CLOSURES AND A WATCHDOG TIMER, B. FEEDING AND STORING MEANS FOR FEEDING AND STORING AN ANTICIPATORY CONTROL PROGRAM IN SAID MINICOMPUTER, C. GENERATING MEANS FOR GENERATING SAMPLED DATA INPUTS FROM EACH REACTOR OF PRESSURE, AGITATOR SPEED, INLET AND OUTLET MELT VISCOSITY, INLET AND OUTLET TEMPERATURE, AND PUMP SPEED, D. GENERATING MEANS FOR GENERATING ANALOG SAMPLED INPUTS OF PHYSICAL REPRESENTATIONS OF REACTOR PRESSURE, AGITATOR SPEED, INLET AND OUTLET MELT VISCOSITY, INLET AND OUTLET TEMPERATURE, AND PUMP SPEED, E. STORING MEANS FOR STORING SAID ANALOG SAMPLED INPUT, F. PROCESSING MEANS FOR PROCESING SAID ANALOG SAMPLED INPUTS BY RELATING SAID SAMPLED INPUTS TO SAID ANTICIPATORY CONTROL PROGRAM, AND G. CONTROLLING MEANS FOR CONTROLLING SAID POLYMER INTRINSIC VISCOSITY DURING ITS POLYCONDENSING REACTION STAGES WITHIN PREDETERMINED LIMITS OF SAID ANTICIPATORY CONTROL PROGRAM, THE INTRINSIC VISCOSITY OF THE FIBER-FORMING POLYESTER BEING CONTROLLED WITHIN $ 0.005 UNITS.
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2. The control apparatus of claim 1 wherein the intrinsic viscosity of the polyester is maintained at 0.91 + or -0.005.
Specification
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Current AssigneeAsa Carlyle Jr. Moody, James William Shiver, Richard George Kenward
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Original AssigneeAsa Carlyle Jr. Moody, James William Shiver, Richard George Kenward
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InventorsMoody, Asa Carlyle Jr., Kenward, Richard George, Shiver, James William
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Primary Examiner(s)Ruggiero, Joseph F.
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Application NumberUS05/280,710Time in Patent Office974 DaysField of Search235/151.12,150.1,151.1 340/172.5 260/75R,475R,346.1,94.9P,94.9,94.2,94.3,698,699,700 444/1US Class Current700/269CPC Class CodesB01J 2219/00168 controlling the viscosityC08G 63/785 characterised by the appara...G01N 11/14 by using rotary bodies, e.g...
