PE/PP Film / Woven Bag Washing and Recycling Line

PE/PP Film / Woven Bag Washing and Recycling Line

Model Range: 200–300 kg/h | 300–400 kg/h | 400–500 kg/h | 600–800 kg/h

The PE/PP Film / Woven Bag Washing and Recycling Line from Chenxing Machinery is an integrated wet-processing system designed to convert post-consumer and post-industrial PE/PP film, bags, and woven sacks into clean, dry flakes ready for pelletizing. Spanning crushing, high-speed friction washing, float-sink separation, spray rinsing, centrifugal dewatering, and hot-air drying, the line delivers final flake moisture ≤2% and purity ≥98% — meeting the feedstock standards of any single-screw extruder or shredder-extruder combination pelletizing system. Four standardized capacities from 200 kg/h to 800 kg/h are available, with layout customizable in "L" or "U" shape to fit your workshop footprint. Explore our full range of plastic recycling solutions.

Technical Parameters

Note: The cyclone storehouse does not have independent power rating; it serves as a terminal collection silo.

Machine-by-Machine Function & Process Details

Processable Materials

Core Features

• All-in-One Wet Processing: Crushing → friction washing → float-sink separation → spray rinsing → dewatering → hot-air drying in a single automated line, eliminating manual transfer between standalone machines.

• Density Separation Precision: With water as the medium and ≤10 mm controlled flake size, PE/PP floats while heavy contaminants sink, achieving ≥98% single-pass purity and ≥99.5% with tandem tanks.

• Flexible Layout Architecture: "L" or "U" shape configuration adapts to existing workshop dimensions, minimizing civil works. All units are skid-mounted for rapid installation.

• Modular Capacity Scaling: Four pre-engineered models from 200 kg/h to 800 kg/h, plus optional hot washer modules for heavily soiled agricultural film — scale up without redesign.

• Water Conservation Ready: Standard configuration supports 2–3 m³ of water per ton of input. With optional closed-loop treatment (multi-stage sedimentation + sand filtration), makeup water drops to 0.3–0.5 m³/ton.

• Wear-Resistant Construction: Crusher blades and friction washer screens are fabricated from SKD-11 or D2 tool steel with HRC 58–62 hardness; dewatering screen mesh is 304 stainless steel.

• Pelletizing-Ready Output: Final flakes at moisture ≤2%, purity ≥98%, flake size 10–15 mm — compatible with any plastic pelletizer machine or high-output single-screw extruder for direct feeding.

• CE & ISO Compliant Electrical: All motors are protected to IP55; control cabinet includes VFD drives, overload relays, and emergency stop loop with safety interlock.

Complementary equipment is available from our auxiliary machines catalog, including hopper dryers and vacuum loaders.

Process Flow

Step 1 — Feeding

Bales or loose film are loaded onto the belt conveyor, which meters material evenly into the crusher. Feed rate synchronized with crusher current draw via VFD.

Key Parameter: Belt speed 0.5–3 m/min adjustable.

Step 2 — Wet Crushing

Material enters the wet crusher where rotating blades shear film/woven bags into 10–15 mm flakes under continuous water spray. Water pre-cools and pre-washes.

Key Parameter: Rotor speed 560–800 RPM; blade gap 0.3–0.5 mm.

Step 3 — Friction Washing

Crushed flakes are transferred by spiral conveyor into the high-speed friction washer. A rotor spinning at 800–1,200 RPM agitates flakes against each other and a perforated screen, scouring off adhered dirt, labels, and organic matter. Water continuously flushes contaminants through the screen.

Key Parameter: Residence time 15–30 seconds; water temperature ambient (cold wash).

Step 4 — Float-Sink Separation

The slurry enters the floating separator washer — a rectangular or U-shaped tank with paddle agitation. Based on specific gravity:

• PE/PP (0.90–0.97 g/cm³) floats — skimmed off the surface by rotating paddles.

• PET, PVC, metals, sand, and glass (＞1.0 g/cm³) sink — discharged from the bottom valve.

Key Parameter: Single-pass separation efficiency ≥98%; tandem configuration ≥99.5%.

Step 5 — Spray Rinsing

Floated clean flakes pass through the spray washer where counter-current high-pressure water nozzles rinse away any residual detergent or fine suspended solids.

Key Parameter: Spray pressure 0.3–0.5 MPa; water consumption 0.5–1 m³/ton.

Step 6 — Dewatering

Rinsed flakes are fed into the vertical centrifugal dewatering machine. A perforated basket spinning at 1,200–1,500 RPM expels water through a 1.5–2.0 mm mesh screen by centrifugal force.

Key Parameter: Outlet moisture ≤5–8%; G-force ≥400 G.

Step 7 — Hot-Air Drying & Collection

De-watered flakes enter the pipeline dryer — an electric heating element generates hot air (80–110°C) that pneumatically conveys flakes through an insulated duct. The hot air evaporates residual surface moisture. A cyclone separator at the terminal end drops dry flakes into the storage silo.

Key Parameter: Final moisture ≤1–2%; drying air temperature 80–110°C (thermostat controlled).

Note: For heavily contaminated agricultural film or woven bags (caked mud, oil, heavy printing), an optional hot washer (60–80°C, 0.5–1% NaOH, 5–10 min residence) is recommended before the friction washer. See our product category page for all available options.

FAQ

1. How does the float-sink separator distinguish PE/PP from PET and contaminants? What is the separation efficiency?

The float-sink separation relies on density differences using water (density ≈1.0 g/cm³) as the medium:

• PE: density 0.91–0.97 g/cm³ — floats.

• PP: density 0.90–0.91 g/cm³ — floats.

• PET: density 1.35–1.40 g/cm³ — sinks.

• PVC: density 1.38–1.42 g/cm³ — sinks.

• Sand, metal, and glass (＞2.0 g/cm³) rapidly sink.

In a single-tank design, separation efficiency reaches ≥98%. With our tandem dual-tank configuration — where floating flakes pass through a second separation stage — purity can be elevated to ≥99.5%. Flake size is controlled at ≤10 mm to ensure no air-entrained buoyancy interference.

2. What is the water consumption of the entire line? Can water be recycled?

In direct-discharge mode, the line consumes 2–3 m³ of fresh water per ton of feedstock.

With an optional closed-loop water treatment system (multi-stage sedimentation tank → chemical flocculation → inclined plate sedimentation → sand filter → process water return), makeup water can be reduced to 0.3–0.5 m³ per ton. The recommended treatment train is: primary sedimentation (remove coarse solids) → dosing coagulation/flocculation (PAC + PAM) → inclined-plate clarifier → quartz sand filter → recycled water tank. This configuration is essential for regions with strict wastewater discharge regulations.

3. What is the final moisture content after dewatering and drying? Does it affect downstream pelletizing?

After the vertical centrifugal dewatering machine, moisture content drops to ≤5–8%. Subsequent hot-air pipeline drying (80–110°C) further reduces moisture to ≤1–2%, which meets the direct-feed standard for single-screw extruder pelletizing.

Why moisture matters for pelletizing: When moisture exceeds 3%, it vaporizes inside the extruder barrel, creating gas bubbles, surface defects, and hydrolytic degradation in the melt. Keeping moisture ≤2% ensures consistent melt quality and pellet surface finish. For critical applications, an additional hopper dryer can be deployed before the extruder.

4. How is heavily contaminated film (soil, oil, paper labels) processed?

For heavily contaminated agricultural film, greasy packaging, or PP woven bags with stubborn mud:

• Add a hot washer module (60–80°C water bath, 0.5–1% NaOH solution, residence time 5–10 minutes) positioned after crushing but before friction washing. Hot alkaline water hydrolyzes grease, swells and detaches labels, and emulsifies organic residues.

• For baled compacted material: Add a pre-shredder before the belt conveyor to break down bales into manageable chunks.

• For paper label removal: After the float-sink separator, add a cyclone de-dusting unit to aspirate lightweight paper fibers and label fragments that may have floated with the PE/PP flakes.

These enhancements are modular and can be retrofitted. Contact our engineering team for a customized layout — see about us.

5. What is the final flake quality? Can flakes be fed directly into a pelletizing extruder?

The washing line consistently produces flakes with the following specifications:

• Flake size: ≥12 mm (10–15 mm typical range).

• Moisture: ≤1–2%.

• Purity: ≥98% (single-pass float-sink); ≥99.5% with tandem.

• Bulk density: 350–450 kg/m³ (depends on material type).

These flakes are directly suitable for feeding into a plastic pelletizer machine or high-output single-screw extruder without additional intermediate processing. For recyclers targeting food-grade or high-value PCR resin, we recommend adding an optical color sorter after drying to achieve ≥99.9% purity and uniform color fractionation. See our latest news for case studies.

Why Choose Chenxing Machinery

1. 15+ Years of Plastic Recycling Expertise Chenxing Machinery has been a dedicated manufacturer of plastic washing and pelletizing equipment since 2008. Our engineering team brings deep process knowledge across PE, PP, PET, PVC, and ABS recycling streams — from single-machine supply to turnkey production lines. We also offer complementary systems including PVC pipe extrusion lines and PVC roof tile extrusion lines.

2. Engineered-to-Order Layout Every PE/PP washing line is configured in either "L" shape or "U" shape according to your workshop dimensions, column grid, and material flow logic. We provide 3D layout drawings with utility point locations before manufacturing. Browse our product category for all available configurations.

3. Rigorous Factory Acceptance Test (FAT) Every line undergoes a 4-hour continuous dry/wet run test at our facility before shipment. We invite clients to witness the FAT on-site or via live video. Critical performance metrics — throughput, moisture, purity — are verified against contractual guarantees.

4. Global After-Sales Support Installation supervision, operator training, and 12-month warranty on mechanical components. Spare parts for wear items (blades, screens, bearings) are pre-packed with every shipment. Remote troubleshooting via video call is available within 24 hours. We also supply pipe coilers, chillers, and vacuum conveyor loaders to complete your production setup. See our full range of auxiliary machines.

Start Your Inquiry — 4 Steps to a Customized Solution

Step 1 — Share Your Material & Target Send us details of your waste material type (agricultural film / PP woven bags / mixed packaging), estimated monthly tonnage, desired final flake moisture and purity, and workshop dimensions. Email: ceo@cxsljx.com.

Step 2 — Receive a Tailored Proposal Our engineering team will propose the optimal model (200–800 kg/h), layout shape ("L" or "U"), and optional modules (hot washer, tandem float-sink, closed-loop water) within 48 hours, including a 3D layout sketch.

Step 3 — Factory Visit or Video FAT Visit our factory in Zhangjiagang to witness a running line under test, or request a live video FAT. See for yourself the build quality and performance before you commit.

Step 4 — Delivery, Installation & Training Once confirmed, production lead time is 30–45 days. We dispatch an installation engineer to your site for assembly, commissioning, and operator training — ensuring your line hits nameplate capacity from day one.

Contact Us Now:

• Phone / WhatsApp: +8615951187228

• Email: ceo@cxsljx.com

• Company: Zhangjiagang Chenxing Machinery Co., Ltd.

• Contact Us Page

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