Pelletizing plastic turns mixed scrap, film, fiber, or post-consumer flake into uniform pellets that injection molders, extruders, and compounders will actually pay for. The method you choose \u2014 strand, water-ring, underwater, or hot-die-face \u2014 decides your throughput ceiling, pellet quality, power bill, and resale price per ton. This guide compares the four core methods, maps each one to PET, HDPE, PP, and PE film, and gives realistic 2026 equipment cost ranges so you can size the right line on the first try.<\/p>\n
Pelletizing plastic is the conversion of shredded, washed, or molten plastic waste into small, uniform granules \u2014 typically 2\u20135 mm \u2014 that can be remelted in standard processing equipment. The pellet is the trading unit of the recycling industry: brokers quote per ton of pellet, not per ton of scrap, because pellet shape and bulk density determine how a downstream machine feeds.<\/p>\n
A plastic recycling pelletizing machine sits at the end of a recycling line. Upstream you shred, wash, and dry; the pelletizer melts the clean flake, filters it, extrudes it, and cuts it. The cut method is what separates the four pelletizing technologies covered below.<\/p>\n
\nPrincipais conclus\u00f5es:<\/strong> “Pelletizing” is the cutting step, not the whole line. Pick the cutting method first, then size the extruder and feed system around it.<\/p>\n<\/blockquote>\n
\nThe four pelletizing methods compared<\/h2>\n
Every commercial plastic pelletizer uses one of four cutting principles. Each suits a different material and pellet spec.<\/p>\n