PP Waste Shredder & Polypropylene Grinder for Recycling

The full range of rigid and woven polypropylene: dairy, beverage and logistics crates; bottle caps and closures; PP woven sacks (cement, fertiliser, grain bags); molded furniture like chairs, tables and stools; and general PP molding scrap. Bulky and woven items go through the dual shaft shredder first; small dense items like caps can feed straight into an RE-series grinder. If you have an unusual PP item, bring a sample for a trial — that settles it faster than any datasheet.

Geometry. A crate is a rigid hollow box bigger than most grinder throats — on a high-speed rotor it bounces, deflects and jams long before it cuts. A dual shaft machine’s two counter-rotating shafts grip the item and pull it down between interlocked blades, tearing it apart with torque. The same grip-and-rip action handles curved furniture shells and folded sacks. Grinders excel at the next stage: turning that coarse shred into uniform granules. See the dual shaft shredder range for how the mechanism works.

Wrapping is the classic failure mode for woven PP on single-rotor, high-speed machines — the tape winds around the shaft like thread on a bobbin. Slow-turning dual shaft designs are far more resistant because the interlocked blades keep pulling material down and through rather than letting it spin. Practical tips that help further: feed sacks in batches rather than a continuous stream, and keep strapping and liner bags out of the feed. Raj Electricals also builds dedicated machines for cement bag and non-woven bag shredding.

A dual shaft shredder produces a deliberately uneven coarse shred — that is normal for dual shaft machines and is exactly what granulators and large recyclers buy for further processing. If your buyer is an injection molder, or you reuse material in-house, add the RE-series grinder stage: its mesh screen controls granule size and can be customised to your specification. Many of our customers start by selling shred and add the grinder once volumes justify capturing the extra margin.

Yes, meaningfully. Single-colour lots — all-blue crates, all-white caps — can be reprocessed into visible parts and command better rates; mixed-colour regrind generally goes into black or dark masterbatch applications at lower prices. The sorting costs you only labour at the collection stage, so keep colour lots separate before shredding. Source segregation is the cheapest value-add in the whole PP recycling chain.

Every machine is quoted to the job. What moves the number is capacity, throat size, motor rating, MS or SS construction and the automation you add — a blower, a conveyor, a control panel. Our guide to what drives machine cost walks through each of those; send us your material and daily volume and we will size the machine and quote it, usually the same day.

Power draw follows the model you select — we give you the kW rating with the quotation, and actual consumption runs below it since shredders load intermittently. Beyond power, running costs are blade maintenance (periodic resharpening), lubrication and one operator for manual feeding. Against that, weigh the transport savings from densified scrap and the price difference between loose scrap and shred or regrind — for regular volumes the machine recovers its running costs quickly.

Yes. Bring a representative lot — your heaviest crate, your dirtiest sacks — to our works at Andheri East, Mumbai, and we will run a live trial so you can verify throughput and output on your actual material. We also provide installation and maintenance service on site, pan-India spares support, and export builds with motors matched to your country’s voltage. Contact us to book a trial.