Application

Recycled & Eco-Friendly Plastics

With growing global environmental regulations, plastic recycling and sustainability have become industry trends. Rongpai underwater pelletizing systems play a key role in this sector, processing recycled plastics (e.g., PE, PP, PET), biodegradable plastics (PLA, PBAT), and mixed plastics.
By optimizing the pelletizing process, the systems improve uniformity and flowability of recycled materials, ensuring stable performance in secondary processing for applications in packaging, fibers, construction materials, and more.

Underwater pelletizers play a key role in the recycling and environmentally friendly plastics industry, helping to improve plastic recycling rates and support sustainable development.

Recycled Plastic Pellets

Recycled Polyethylene (r-PE): Plastic bags, agricultural film, recycled pipes

Recycled Polypropylene (r-PP): Recycled automotive plastics, recycled appliance plastics, packaging products

Recycled PET (r-PET): Fiber products, food-grade packaging, preforms

Eco-Friendly Bioplastics

Polylactic Acid (PLA): Food packaging, disposable tableware, biodegradable agricultural film

Polycaprolactone (PCL): Plastic films, plastic pipes, home appliance housings

Polybutylene Adipate Terephthalate (PBAT): Biodegradable packaging bags, courier bags, agricultural films

Recommendation

Underwater Pelletizer

Rongpai underwater pelletizers are specially designed for producing a wide range of polymer-based thermoplastics, primarily producing spherical pellets, with output up to 12,000 kg/h.

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Pellet Drying & Water Processing Systems

Depending on production requirements, pellet dryers can be installed next to the water tank or independently around the silo, both being practical solutions in actual production.

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Melt Diverter Valve

The melt diverter valve serves as the interface between the underwater pelletizing system and upstream equipment, enabling connection or disconnection of the pelletizing process from upstream processes.

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By-pass

Premature or delayed entry of process water into the cutting chamber can lead to unsuccessful startup or even significant production losses in underwater pelletizing operations.

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