The Prediction of Bowing Distortion of Film after Transverse Stretching with Consideration of Heated Air Flow in a Tenter
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M. Tokihisa
, Y. Kushizaki , H. Tomiyama , Y. Yamamoto und T. Yamada
Abstract
The bowing distortion of polypropylene (PP) film during transverse direction (TD) stretching with a tenter was newly predicted with consideration for heated air flow. The distribution of the heat transfer coefficient on film was calculated by the results of air flow analysis in the tenter in order to obtain a more realistic heat transfer condition than in previous works based on an impinging jet model and a wall jet model. Bowing distortion after stretching was calculated by applying the distribution of heat transfer coefficient obtained from air flow analysis under the assumption that the deformation of film obeys an elastic-plastic rule. Another bowing distortion was also calculated by applying an impinging jet model and a wall jet model in order to evaluate the applicability of the distribution of heat transfer coefficient obtained from air flow analysis. The authors experimentally measured the bowing distortion and the film thickness after stretching using a pilot plant. It has been shown that the calculated results based on the distribution of heat transfer coefficient obtained from air flow analysis are closer to the experimental results than previous works based on an impinging jet model and a wall jet model, particularly at faster line speed. It is revealed that the distribution of heat transfer coefficient has a strong influence on the temperature of film, and the difference of the predicted temperature causes a difference in the thickness change in film and longitudinal stress. The authors concluded that the difference in thickness change in film and longitudinal stress brought about the difference in bowing distortion.
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© 2011, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Applicability of the Impact Response Analysis Method for Reinforced Concrete Beams Mixed with Polyvinyl Alcohol Short Fibers
- Epoxy-Montmorillonite Nanocomposites Applied to Powder Coatings
- Direct Imprinting Using Magnetic Nickel Mold and Electromagnetism Assisted Pressure for Replication of Microstructures
- Automated Mold Heating System Using High Frequency Induction with Feedback Temperature Control
- The Prediction of Bowing Distortion of Film after Transverse Stretching with Consideration of Heated Air Flow in a Tenter
- The Influence of Injection Molding and Injection Compression Molding on Ultra-high Molecular Weight Polyethylene Polymer Microfabrication
- A Design-of-Experiment Study on the Microcellular Extrusion of Sub-critical CO2 Saturated PLA Pellets
- Optimization of Injection Molding Process for SGF and PTFE Reinforced PC Composites Using Response Surface Methodology and Simulated Annealing Approach
- Flow Visualisation in Co-rotating Twin Screw Extruders: Positron Emission Particle Tracking and Numerical Particle Trajectories
- The Influence of Melt and Process Parameters on the Quality and Occurrence of Part Defects in Water-assisted Injection Molded Tubes
- Model and Numerical Simulation for the Second Penetration in Water-assisted Injection Molding
- Influence of Extrusion Conditions on the Rheological Behavior of Nuclear Bituminized Waste Products
- Influence of Dicumyl Peroxide Content on Thermal and Mechanical Properties of Polylactide
- Rapid Communications
- Calculation of Average Residence Time in a Ko-kneader
- PPS-News
- PPS News
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Applicability of the Impact Response Analysis Method for Reinforced Concrete Beams Mixed with Polyvinyl Alcohol Short Fibers
- Epoxy-Montmorillonite Nanocomposites Applied to Powder Coatings
- Direct Imprinting Using Magnetic Nickel Mold and Electromagnetism Assisted Pressure for Replication of Microstructures
- Automated Mold Heating System Using High Frequency Induction with Feedback Temperature Control
- The Prediction of Bowing Distortion of Film after Transverse Stretching with Consideration of Heated Air Flow in a Tenter
- The Influence of Injection Molding and Injection Compression Molding on Ultra-high Molecular Weight Polyethylene Polymer Microfabrication
- A Design-of-Experiment Study on the Microcellular Extrusion of Sub-critical CO2 Saturated PLA Pellets
- Optimization of Injection Molding Process for SGF and PTFE Reinforced PC Composites Using Response Surface Methodology and Simulated Annealing Approach
- Flow Visualisation in Co-rotating Twin Screw Extruders: Positron Emission Particle Tracking and Numerical Particle Trajectories
- The Influence of Melt and Process Parameters on the Quality and Occurrence of Part Defects in Water-assisted Injection Molded Tubes
- Model and Numerical Simulation for the Second Penetration in Water-assisted Injection Molding
- Influence of Extrusion Conditions on the Rheological Behavior of Nuclear Bituminized Waste Products
- Influence of Dicumyl Peroxide Content on Thermal and Mechanical Properties of Polylactide
- Rapid Communications
- Calculation of Average Residence Time in a Ko-kneader
- PPS-News
- PPS News