Compressed air dryers are designedto be fitted directly to the throat of smaller throughput machines. These Compressed Air dryers are compact and light in weight, but still use desiccant bed technology, making them ideally suited for the technical moulding sector. The units use factory compressed air rather than using the electric blowers that are typically fitted to larger floor standing dehumidifying units.
Dehumidifying Dryers are designed to remove any moisture present in polymer (i.e. held within the plastic granules due to absorption from the atmosphere) before being processed. Air is forced through a desiccant bed to make it extremely dry. This air is then heated to a specified temperature and fed into a Drying Hopper containing the material to be dried.This hot dry air draws the moisture out of the material. This removal of internal moisture prior to processing is critical for ‘Hydroscopic’ material grades such as Nylon and ABS.
Hot Air Dryers are designed to remove surface moisture from non-hygroscopic polymer, and also to pre-heat material prior to processing. They comprise an insulated stainless steel hopper with attached blower and heater. Hot air is blown through the polymer granules and the wet air is then expelled to atmosphere. These units are not suitable for use with materials that absorb moisture (hydroscopic).