In the plastic recycling industry, PP jumbo bags (FIBCs) and woven bags are notoriously difficult to process due to their high strength, large volume, and potential for high contamination. To achieve high-quality output and stable production, a specialized technical setup is required.

PURUI Machinery’s recycling solution is the integration of shredder with the ML130 / SJ140 double-stage pelletizing line. This combination ensures that even the toughest woven materials are transformed into uniform, high-value pellets.

Pre-Processing: The Shredder

Because jumbo bags are designed to carry tons of weight, they are incredibly tear-resistant. A standard plastic granulator often struggles with the heat generated during cutting. The plastic shredder solves this by:

• Size Reduction: Breaking down large bags into manageable flakes.
• Controlled Feeding: Ensuring a steady flow of material into the plastic pelletizing line, preventing blockages.

First Stage: ML130 Cutter Compactor Extruder

The ML130 granulator is the heart of the system. It features an integrated Cutter Compactor that performs three functions simultaneously:

• Cutting & Densifying: The centrifugal force of the blades further shreds the bags while friction heat dries and shrinks the material into a dense “popcorn” state.
• Direct Feeding: The densified material is forced directly into the extruder screw at a consistent rate, maximizing throughput.

Second Stage: SJ140 Double-Stage Refining

The SJ140 (the “Double Stage”) is crucial for high-contamination woven bags. After the first extrusion, the material enters the SJ140 for:

• Superior Degassing: Any trapped moisture or ink-related volatiles are removed through vacuum zones.
• Fine Filtration: By passing through two separate screen changers, impurities are filtered out twice, ensuring the final pellets are clean enough for high-end applications like new woven bag production.

PURUI’s Recycling Solution Benefits:

• High Output: Reaches optimal capacity through the synergy of 130mm and 140mm screw diameters.
• Energy Efficiency: The cutter-compactor design reduces the need for pre-drying.

• Quality: Double-stage filtration ensures premium pellet purity.

FAQ:

Q1: Why use double-stage instead of single stage pelletizing line?

A: PP woven bags often contain printing ink and moisture. A single stage might leave air bubbles or impurities in the pellets. The double-stage provides extra filtration and degassing, resulting in “solid” and clean pellets.

Q2: Can this line handle wet material?

A: Yes. The cutter compactor in the ML130 generates friction heat that helps dry surface moisture, and the SJ140 vacuum system removes deep moisture.

Q3: How does the shredder + pelletizing line save on labor costs?

A: Traditional lines require manual cutting of jumbo bags or labor-intensive feeding. Our integrated system allows for “One-Stop” automation. Large bags are fed into the shredder via a conveyor, automatically transferred to the pelletizing line, and processed into pellets. Usually, only one operator is needed to monitor the entire line via the PLC control system.

Why Choose Purui Machinery:

With over 25+ years of expertise and a footprint in over 100 countries, Purui Machinery continues to lead the way in plastic regeneration.

Purui Machinery is a high-tech enterprise specializing in the R&D and manufacturing of plastic recycling machinery. Its product portfolio includes plastic pelletizing lines, washing lines, and crushing equipment. Purui is dedicated to providing global customers with the most efficient, reliable, and intelligent plastic regeneration systems.

Contact Us to Get Your Customized Recycling Solution:

E-mail: [email protected]

Tel / Whatsapp: +8617701563079

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