Polyester |
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For polyester and co-polymer chips, BARR-ROSIN offers the latest technology in a continuous system which comprises a Fluid Bed Crystalliser combined with a specially designed Column Dryer to give a compact, energy efficient unit. The virgin chips are fed into the Fluid Bed Crystalliser where they are agitated by a hot air stream. This removes all surface moisture and any fine particles of dust which may be present in the feed material and ensures that the chips do not stick to each other. Depending on the type of polyester the chips are normally crystallised at 160° C before passing over an adjustable weir into the adjacent Column Dryer. Developed over a number of years, the design of our special dryer ensures piston flow of the chips as they descend in the column with a small counterflow of heated dehumidified air passing up through the chips, resulting in intimate contact and producing a consistent uniformly dried product. The dry chips are discharged at the base of the Column, which can be arranged to directly feed the extruder. Output is normally controlled between 20 and 110% of the rated capacity by automatic control of the feed rate. Even with varying outputs, chips will continue to be discharged at a constant final moisture content, guaranteeing process consistency and high quality.
Where required, BARR-ROSIN can also supply complete wet and dry chips conveying systems for the plant. For Nylon chips the Fluid Bed is optional where it can be used for preheating, dedusting and initial drying. Nylon 6 and 6.6 may be dried using the column only. Canadian Plastics Industry Association |
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If you have a specific drying or cooling application, please complete the more detailed Process Data Questionnaire form. |
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