Extrudate Swell of High Density Polyethylenes in Slit (Flat) Dies
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V. K. Konaganti
Abstract
Extrudate swell of industrial-grade high-molecular mass high-density polyethylenes (HDPEs) in flat/slit dies is studied using both experiments and simulations. The experimental set-up consists of an optical micrometer to measure the extrudate dimensions and a pair of radiation heaters to control the extrudate temperature outside the die attached to the capillary rheometer. The simulation of extrudate swell phenomenon is carried out by using a well-known integral K-BKZ model. The effects of several rheological characteristics, die characteristics, and processing conditions on swell measurements are studied systematically, and the corresponding two-dimensional, steady-state numerical predictions are presented in this paper. This study includes the effects of polymer molecular characteristics, apparent shear rate, die geometrical characteristics (length to die gap (L/H) and width to die gap (W/H)), and distance from the die exit. It is found that the integral K-BKZ model predicts well both the width and thickness extrudate swells. Extrudate swell measurements demonstrate that the thickness swell is predominant in comparison with width swell.
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© 2016, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Research and Application of Wireless Temperature Measurement Device in High Temperature Enclosed Environment
- Influence on Product Quality by pvT-Optimised Processing in Injection Compression Molding
- Effect of Plug Temperature on the Strain and Thickness Distribution of Components Made by Plug Assist Thermoforming
- Influence of Processing Parameters and Composition on the Effective Compatibilization of Polypropylene–Poly(ethylene terephthalate) Blends
- Impact Modification of Isotactic Polypropylene with Ethylene-Propylene Diene Monomer Rubber
- Impact Behavior of Continuous Biaxial Reinforced Composites Based on Bio-Polyamides and Man-Made Cellulose Fibres
- Preparation and Anti-Fouling Property of Acryloylmorpholine-Grafted PVDF Membrane: The Effect of Cross-Linking Agent
- Fine Filament Formation Behavior of Polymethylpentene and Polypropylene near Spinneret in Melt Blowing Process
- Fracture Toughness of PP/EPDM/Nano-Ternary Composites: The Role of Distribution of Inorganic Particles
- CO2 Laser Ablation of Microchannel on PMMA Substrate for Effective Fabrication of Microfluidic Chips
- A Novel Micro Wall Slip Model Based on Chain Length and Temperature
- Electrical and Mechanical Properties of Antistatic Poly(vinyl chloride) Composites Filled with Silver Plated Hollow Glass Microspheres
- Prototype System to Study the Effect of Weld Lines on the Performance of Extruded Profiles
- Extrudate Swell of High Density Polyethylenes in Slit (Flat) Dies
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Artikel in diesem Heft
- Contents
- Contents
- Regular Contributed Articles
- Research and Application of Wireless Temperature Measurement Device in High Temperature Enclosed Environment
- Influence on Product Quality by pvT-Optimised Processing in Injection Compression Molding
- Effect of Plug Temperature on the Strain and Thickness Distribution of Components Made by Plug Assist Thermoforming
- Influence of Processing Parameters and Composition on the Effective Compatibilization of Polypropylene–Poly(ethylene terephthalate) Blends
- Impact Modification of Isotactic Polypropylene with Ethylene-Propylene Diene Monomer Rubber
- Impact Behavior of Continuous Biaxial Reinforced Composites Based on Bio-Polyamides and Man-Made Cellulose Fibres
- Preparation and Anti-Fouling Property of Acryloylmorpholine-Grafted PVDF Membrane: The Effect of Cross-Linking Agent
- Fine Filament Formation Behavior of Polymethylpentene and Polypropylene near Spinneret in Melt Blowing Process
- Fracture Toughness of PP/EPDM/Nano-Ternary Composites: The Role of Distribution of Inorganic Particles
- CO2 Laser Ablation of Microchannel on PMMA Substrate for Effective Fabrication of Microfluidic Chips
- A Novel Micro Wall Slip Model Based on Chain Length and Temperature
- Electrical and Mechanical Properties of Antistatic Poly(vinyl chloride) Composites Filled with Silver Plated Hollow Glass Microspheres
- Prototype System to Study the Effect of Weld Lines on the Performance of Extruded Profiles
- Extrudate Swell of High Density Polyethylenes in Slit (Flat) Dies
- PPS News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts