Coating by the fluidised bed process -
This technique involves dipping a heated article into a tank of fluidised plastic powder. This process is widely accepted as the most efficient means of coating wireware, tubular frames, metal pressings and other open design metal products.
Units from small clips and brackets to wire or tube frames up to 2.2 metres in length can be coated in a range of thermoplastic materials. Polydip has fluidised beds of various materials and colours to cope with the most demands of industry.
Polydip uses a range of thermoplastics including Nylon, Polyethylene, and PVC Plastisol.
Polydip’s plastic coatings provide a cost effective, attractive and functional finish for wire, tubular, and open design metal products. Sharp edges and welding blemishes are generally covered, thus eliminating the need for grinding or linishing and therefore reducing the cost of manufacture of these components.
NYLON
NYLON is the hardest and thinnest of the thermoplastic materials used for coating wirework, tubular products and metal pressings. It is ideal for applications such as wirework, dishwasher baskets, steel furniture, trolleys, and automotive components, where a tough, rugged, UV stable coating is required.
Nylon coatings are serviceable at temperatures down to -40oC without any change in their chemical properties. They have a long-term heat resistance up to +80oC and in the absence of mechanical loading will withstand short-term heating to temperatures up to +160oC without damage.
Nylon coating using the Polydip method offers the following characteristics:
POLYETHYLENE
Low density polyethylene (LDPE) is the most widely used, low cost coating material for decorative wirework. It gives a good gloss finish, is slightly waxy to the touch, has no toxicity or taint characteristics and is, therefore, ideal for use on refrigerator shelves, clothes airers, dish drainers and many kitchen wire products. LDPE is not, however, usually recommended for outdoor applications, as it can be affected by the ultra-violet rays of sunlight.
PVC PLASTISOL
This coating method consists of dipping a heated metal article into a tank of pvc plastisol. The heat allows a layer of plastisol to deposit and fuse with the part.
Plasticised PVC paste or plastisol is a thick rubbery like coating, ideal for components which need to provide grip, noise absorption, and shock resistance. Typical applications are automotive components, and tool handles.
