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Complete 6 pages APA formatted article: Polymer Melt Viscosity in an Extrusion Based Process.
Complete 6 pages APA formatted article: Polymer Melt Viscosity in an Extrusion Based Process. The booming growth of the polymer industry and its impact on the world is very much visible and evident in everyday lives. The growth of the polymer industry is brought by the unique properties of plastic products (De Laney). Plastics are characterized by easy shaping and fabrication, low densities, resistance to corrosion, electrical and thermal insulation, and often favorable rigidity and toughness per unit weight. Extrusion is one of the most important operations in polymer processing, injection molding being the other one. Both these processes involve the following steps: (a) heating and melting the polymer, (b) pumping the polymer to the shaping unit, (c) forming the melt into the required shape and dimensions, (d) cooling and solidification. Other processing methods include calendering, blow molding, thermoforming, compression molding and rotational molding. More than 30000 grades of polymers are being processed by these methods (De Laney).
However, nowadays, the plastics compounding and extrusion industries are being affected by high resin and labor costs and the demand and need for superior product performance and consistent quality. Therefore, it is important that suppliers and producers of many polymer products such as film, sheet, profile, tubing, and pipe avoid inconsistencies and flaws in the products they produce. This is the only way by which they could ensure their survival in the growing market of the polymer industry. Unfortunately, even when all of the operational parameters in an extrusion process such as pressure, temperature, screw rotation rate, and other factors are taken to utmost control and monitoring, there are still possibilities that the product would fail the set specifications and may exhibit inconsistencies. An extruder is a machine aimed to produce more or less continuous lengths of plastic sections. It is composed of a tubular barrel, usually electrically heated.
