PP Raffia Woven Bag Recycling Machine Suppliers

PP woven bags are produced from extruded raffia tape — flat PP filaments woven into fabric and converted into sacks. Post-use bags for recycling come from several sources: cement sacks (heavily contaminated with cement dust and often laminated with PE inner liners); fertiliser sacks (contaminated with mineral fertiliser residues — may be corrosive to equipment); animal feed sacks (contaminated with organic residues and dust); FIBC/big bags (very large, heavy bags used for bulk industrial materials — often contaminated with mineral powders, chemicals, or food materials). The main processing challenges are: the fibrous nature of shredded woven fabric — it tangles and wraps easily; the variable contamination type and level by bag application; the PE or BOPP laminate layers that must be separated or co-processed; and the tendency of shredded raffia to produce very fine fibres that are difficult to convey and separate. Effective PP woven bag recycling requires purpose-designed shredding, an effective washing sequence for the specific contamination, and either a specially configured pelletiser or a granulator capable of compacting low-density fibrous material.

A typical PP woven bag recycling line consists of: a heavy-duty single-shaft shredder or dedicated bag shredder that handles the full bag size and minimises long fibre production; a friction washer or agitator washer designed for fibrous material; rinsing tanks; a centrifugal dryer; a compacting screw or densifier to consolidate the low-density shredded material before the extruder; and a single-screw or twin-screw pelletising extruder with melt filtration. For cement-contaminated bags, a pre-cleaning stage (air knife or drum shaker to remove dry loose cement before wetting) significantly reduces the washing load. The PE inner liner that many cement and fertiliser sacks contain floats in the wash tank and can be separated by density — confirm whether your bags have PE liners and how the line handles this co-material. Output is rPP pellets suitable for woven bag production (as a recycled content blend), pipe compounding, and injection moulded products.