Distributed Crystallinity Control during Cast Film Extrusion
-
T. Leephakpreeda
Abstract
The properties of polymer material can be shaped by crystallinity distribution during the film extrusion process. This paper addresses the implementation of design sensitivity analysis to determine the process inputs which can generate the desired crystallinity distribution. To achieve such a goal, the performance index is defined in terms of the difference between the desired and the actual crystallinity distributions. The sensitivity of the performance index to process inputs is determined in order to update these process inputs in every iteration of optimization. The design sensitivity analysis presented here allows a systematic movement through the search space to reach a sub-optimal set of process inputs. The simulation results show that the proposed methodology can determine the process inputs in order to generate the crystallinity distribution close to the desired one.
© 1997, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Editorial
- Editorial
- Screw Extrusion/Mixing
- Melt Temperatures and Residence Times in an Extruder by Infrared Spectroscopy
- Continuous Mixing of Low Viscosity and High Viscosity Polymer Melts in a Modular Co-Rotating Twin Screw Extruder
- Flow Field Analysis of Both the Trilobal Element and Mixing Disc Zones within a Closely Intermeshing, Co-Rotating Twin-Screw Extruder
- A Composite Model for Solid Conveying, Melting, Pressure and Fill Factor Profiles in Modular Co -Rotating Twin Screw Extruders
- Temperature Rise in the Extrusion of Highly Viscous Composite Materials
- Simulation of Free Surface Flow in Partially Filled Internal Mixers
- Die Extrusion
- Processing of Sheath-Core and Matrix-Fibril Fibers Composed of PP and a TLCP
- Fibers and Films
- Experimental and Theoretical Study of Rectangular Fiber Melt Spinning
- Distributed Crystallinity Control during Cast Film Extrusion
- Application of Neural Networks to Analyze the Drawing Process of PET Films
- Molding
- Physically-Based Adaptive Control of Cavity Pressure in Injection Molding: Filling Phase
- In-Mould Shrinkage Measurements of PS Samples with Strain Gages
- The Occurrence of Flow Marks during Injection Molding of Linear Polyethylene
Articles in the same Issue
- Contents
- Contents
- Editorial
- Editorial
- Screw Extrusion/Mixing
- Melt Temperatures and Residence Times in an Extruder by Infrared Spectroscopy
- Continuous Mixing of Low Viscosity and High Viscosity Polymer Melts in a Modular Co-Rotating Twin Screw Extruder
- Flow Field Analysis of Both the Trilobal Element and Mixing Disc Zones within a Closely Intermeshing, Co-Rotating Twin-Screw Extruder
- A Composite Model for Solid Conveying, Melting, Pressure and Fill Factor Profiles in Modular Co -Rotating Twin Screw Extruders
- Temperature Rise in the Extrusion of Highly Viscous Composite Materials
- Simulation of Free Surface Flow in Partially Filled Internal Mixers
- Die Extrusion
- Processing of Sheath-Core and Matrix-Fibril Fibers Composed of PP and a TLCP
- Fibers and Films
- Experimental and Theoretical Study of Rectangular Fiber Melt Spinning
- Distributed Crystallinity Control during Cast Film Extrusion
- Application of Neural Networks to Analyze the Drawing Process of PET Films
- Molding
- Physically-Based Adaptive Control of Cavity Pressure in Injection Molding: Filling Phase
- In-Mould Shrinkage Measurements of PS Samples with Strain Gages
- The Occurrence of Flow Marks during Injection Molding of Linear Polyethylene
