Main Packaging Converting Technologies
Converters turn plastic granules into final products using a variety of techniques.
Thermoforming refers to a process where a plastic sheet is heated to a pliable forming temperature, formed to a specific shape in a mould, and trimmed. It is the most efficient process for high-volume, low-cost packaging materials and barrier applications such as food containers.
Blown Film Extrusion
Blown Film Extrusion involves conveying a blended mix of resins through a heated screw-fed barrel prior to it being fed through a circular die. Once extruded, the mix is inflated with air to form a film bubble that is drawn some height to allow sufficient cooling before the bubble is collapsed into a flat tube which then descends downwards for slitting / winding.
Rotational moulding uses a heated hollow mould which is filled with a measured quantity of resin and then rotated so that the softened material solidifies within the walls of the mould. It is a versatile process and its low tooling costs make it ideal for plastic parts with lower run quantities.
Blow moulding is a process by which hollow plastic parts are formed. It is the ideal application for reclosable containers and particularly for narrow necks and pouring purposes
Injection moulding is a process for producing parts by injecting material into a mould. It is optimal for high added value, complex designs that may have a high level of decoration.
Text and Pictures courtesy of the RPC Group, click here to see the source.