home contact us products find a sales agent applications lab testing technical library home > applications > plastic PLASTIC The plastics industry includes establishments manufacturing products from plastics resins and from natural, synthetic, or reclaimed rubber, plastic pellets and more. Most of our customers in this industry utilize our standard round separator for its efficiency in removing unwanted material from their process. Another option has recently been introduced, the DC Classifier, for those customers who wish to not only separate the longs and fines from their pellets, but who need to dry and cool the product during the process. Additional Applications Chemical Food & Beverage Minerals Pharmaceutical Plastic Pulp & Paper Ceramic Laundry Powder Coating PRODUCT RECOMMENDATIONS Vibratory Round Separators Rectangular Separators GyraMax Gyratory Sifters DC Classifier Sta-Sieve APPLICATION 1: Some camera manufacturers require a method of removing undesirable fines from reground plastic used in molding parts for camera products. Fines in regrind plastic may cause one or more problems: a) streaking or discoloration of the finished part; b) variations in particle size, and, therefore, in bulk density, cause shot-to-shot variations in the mold; c) because of a lower melting point, fines tend to create gassing when temperatures are elevated to levels sufficient to melt larger particles. A Sweco Separator is used to screen the reground plastic, separating the fines out and sending the clean product back to the molding machines. APPLICATION 2: In the production of Polyethylene and Polypropylene, Sweco vibratory separation equipment is widely used in the process. Located downstream from the extruder and cutter, round or rectangular separation equipment is used to remove the "longs", "angel hair", and "streamers" from the plastic pellets. The plastic pellets of these products are used to manufacture an abundance of plastic products ranging from water bottles to computer casings. APPLICATION 3: Manufacturers of plastic pellets quite often are looking to perform various functions prior to packaging or sending the pellets to the next stage in the process. After coming out of the extruder, the long string of softened, semi-liquid plastic enters a water bath for cooling/solidification. The plastic is then sent to the cutter where the strings are cut into pellets. Before moving on to the packaging stage, the pellets must be dried and cooled and the longs and fines removed. If the residual water is not removed and the pellets are not cooled properly, quite often the pellets will end up sticking together once packaged. And removing the fines and longs from the material allows for a much higher quality end-product. The DC Classifier was designed to effectively dry, cool and classify all in one machine. Plastics industry companies have found great benefits of combining all of these necessary functions into one machine. Plastic companies around the world look to Sweco for solutions to the most difficult classification processes. Let Sweco help solve your particle distribution issues. Contact a Sweco professional today. TYPICAL PLASTIC APPLICATIONS • Acetylene • Coatings • Coke • Epoxy • Foam Containers • Glaze • Injection Molds • Latex • Lucite • Oil • Phenolics • Plastic Beads • Plastic Chips • Plastic Fines • Plastic Pellets • Plastic Regrind • Plastisol • Polyethylene • Polymers • Polypropylene • Polystyrene • PVC • Resins • Rubber • Silicon • Styrene Beads • Styrofoam • Teflon • Tire Rubber • Wax about usused equipmentnewsorganizations & associationstradeshowssite map ©2009 Sweco, a business unit of M-I L.L.C. | legal policy | qhse policy