The Mechanism of Neck-in Phenomenon in Film Casting Process
Abstract
In this study, the non-isothermal viscoelastic simulation of the film casting process was carried out. Low-density polyethylene polymerized by a high-pressure process (LDPE) was used for the simulation. The LDPE exhibited strain hardening in elongational viscosity since it has long chain branching. The Phan-Thien/Tanner model, as a constitutive equation of the viscoelastic fluid, and temperature dependence of the Arrhenius law were employed for the simulation to investigate the effect of viscoelasticity on extrusion drawing, so-called neck-in phenomenon. We developed the theoretical model on the basis of deformation type and force balance of a film to recognize the mechanism of the neck-in phenomenon. It was confirmed from a combination of the simulation results and the theoretical model that neck-in was determined by the ratio of planar to uniaxial elongational viscosity rather than the strain hardening nature of a uniaxial elongational viscosity.
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Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- The Processing Behavior of Liquid Sn/Molten Polyethylene during Internal Mixing
- Study on Packing Phase Control Based on the Cavity Pressure-Temperature during Injection Molding
- Synthesis and Properties of a Novel Intumescent Flame Retardant and its Application in LLDPE
- The Mechanism of Neck-in Phenomenon in Film Casting Process
- Morphology, Mechanical and Thermal Properties of Recycled PC/ABS Blends Processed via Vane Extruder
- Thermal Conductivity of Polypropylene Composites with Combined Boron Nitride Fillers
- Characterization on Biodegradation of Enzymatically Synthesized Polylactic Acid by Using Alkaline Protease and Lipase
- Numerical Investigation and Experimental Observation of Extrudate Swell for Viscoelastic Polymer Melts
- Processing and Wear Analysis of Blast Furnace Slag Filled Polypropylene Composites Using Taguchi Model and ANN
- Microchannel Deformation of Polymer Chip in In-Mold Bonding
- Synthesis and Characteristics of Graft Copolymerization of Starch-G-PAM Using A Twin-Roll Mixer as Reactor for Cornstarch with Different Amylose/Amylopectin Ratios
- Experimental Investigation of PC-Films Using Optical Measurements
- Effect of Compounding Conditions on Static and Dynamic Mechanical Properties of High Density Polyethylene/Ground Tire Rubber Blends
- Effect of Feeding Strategy on the Mechanical Properties of PP/Recycled EPDM/PP-G-MA Blends
- Synthesis and Characterization of Chitosan & Amino Acid Superabsorbent Hydrogels
- Rapid Communications
- Negative Pressures in Modelling Rotating Polymer Processing Machinery Are Meaningless, But They Are Telling Something
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- The Processing Behavior of Liquid Sn/Molten Polyethylene during Internal Mixing
- Study on Packing Phase Control Based on the Cavity Pressure-Temperature during Injection Molding
- Synthesis and Properties of a Novel Intumescent Flame Retardant and its Application in LLDPE
- The Mechanism of Neck-in Phenomenon in Film Casting Process
- Morphology, Mechanical and Thermal Properties of Recycled PC/ABS Blends Processed via Vane Extruder
- Thermal Conductivity of Polypropylene Composites with Combined Boron Nitride Fillers
- Characterization on Biodegradation of Enzymatically Synthesized Polylactic Acid by Using Alkaline Protease and Lipase
- Numerical Investigation and Experimental Observation of Extrudate Swell for Viscoelastic Polymer Melts
- Processing and Wear Analysis of Blast Furnace Slag Filled Polypropylene Composites Using Taguchi Model and ANN
- Microchannel Deformation of Polymer Chip in In-Mold Bonding
- Synthesis and Characteristics of Graft Copolymerization of Starch-G-PAM Using A Twin-Roll Mixer as Reactor for Cornstarch with Different Amylose/Amylopectin Ratios
- Experimental Investigation of PC-Films Using Optical Measurements
- Effect of Compounding Conditions on Static and Dynamic Mechanical Properties of High Density Polyethylene/Ground Tire Rubber Blends
- Effect of Feeding Strategy on the Mechanical Properties of PP/Recycled EPDM/PP-G-MA Blends
- Synthesis and Characterization of Chitosan & Amino Acid Superabsorbent Hydrogels
- Rapid Communications
- Negative Pressures in Modelling Rotating Polymer Processing Machinery Are Meaningless, But They Are Telling Something
- PPS News
- PPS News
- Seikei-Kakou Abstracts
- Seikei-Kakou Abstracts