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The effect of the geometry of extrusion head flow channels on the adiabatic extrusion of low density polyethylene

  • Janusz W. Sikora EMAIL logo and Tomasz Garbacz
Published/Copyright: March 12, 2015
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 35 Issue 6

Abstract

Plastics extrusion can be divided into the following types: conventional extrusion (run at low speed of the rotating screw), adiabatic extrusion (screw speed is relatively high, yet the process requires the use of heaters) and high speed extrusion (extruder barrel requires cooling due to very high screw speeds). This paper presents the results of a study undertaken to investigate the adiabatic extrusion of low density polyethylene using heads with circular cross-section nozzles and different geometries of flow channels. In the experiments, we examined the temperature and pressure of the polymer in the plasticizing unit, as well as the relationships between the output, thermal power conveyed by the plastic, total power supplied to the extruder, extrusion efficiency, unit consumption of the total energy supplied to the extruder as well as the rotational speed of the screw and the extruder’s head geometry. It was found that the most favorable energy conditions, i.e., the highest efficiency of the adiabatic extrusion of low density polyethylene in the whole range of the tested screw speeds, are ensured when the head with the highest diameter and length nozzle is applied.

Keywords: efficiency; extrusion head; low density polyethylene; output; screw speed
Corresponding author: Janusz W. Sikora, Department of Polymer Processing, Lublin University of Technology, 38D, Nadbystrzycka St., 20-618 Lublin, Poland, e-mail:

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Received: 2014-9-21
Accepted: 2014-12-11
Published Online: 2015-3-12
Published in Print: 2015-8-1

©2015 by De Gruyter

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https://doi.org/10.1515/polyeng-2014-0276
Keywords for this article
efficiency; extrusion head; low density polyethylene; output; screw speed

Articles in the same Issue

  1. Frontmatter
  2. Original articles
  3. Preparation and application of fluorinated-siloxane protective surface coating material for stone inscriptions
  4. The effect of the preparation process on the swelling behavior of silk fibroin-polyurethane composite hydrogels using a full factorial experimental design
  5. Synthesis of cashew Mannich polyol via a three step continuous route and development of PU rigid foams with mechanical, thermal and fire studies
  6. Effect of chemical treatment on the mechanical and water absorption properties of bagasse fiber-reinforced epoxy composites
  7. Environmentally degradable sago starch filled low-density polyethylene
  8. The effect of hybrid nanoparticle with silica sol as the supporter on the crystallization behavior and mechanical properties of isotactic polypropylene
  9. Towards novel wound dressings: antibacterial properties of zinc oxide nanoparticles and electrospun fiber mats of zinc oxide nanoparticle/poly(vinyl alcohol) hybrids
  10. Nanofiber formation in the presence of an external magnetic field in electrospinning
  11. Preparation and characterization emulsion of PANI-TiO2 nanocomposite and its application as anticorrosive coating
  12. The effect of the geometry of extrusion head flow channels on the adiabatic extrusion of low density polyethylene
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