LDPE powder is a thermoplastic polymer that is the most commonly used plastic material in the world. It has a very low density, high flexibility, and a transparency to it that makes it extremely popular in consumer products like plastic bags. Sieving LDPE Powder can be a difficult process due to the fact that it is generally very fine and has a very low density. Furthermore, LDPE powder has a tendency to coat the screen cloth and can quickly blind a screen mesh if not properly handled.
Elcan Industries has successfully sieving LDPE Powder at sizes as fine as 32um. Using the Hi-Sifter sieving system, particle size at fine sizes is easily controlled due to the high vertical energy being placed into the screen mesh. This breaks up any agglomerates in the powder and allows it to flow freely through the screen cloth. Elcan uses a variety of different feeding mechanisms to carefully monitor the material onto the screen. A tumbler screener can also be used on coarser powders to help guide particles to pass through the hole without using vibrational energy.
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