Water Drainage Sheet Extrusion Line

Typical Use Cases
Landfills – combined with geotextiles as a composite drainage layer, quickly removing leachate while protecting HDPE geomembranes.
Tunnels & underground structures – placed between the primary support and secondary lining to create permanent drainage channels and relieve water pressure.
Green roofs & planted roofs – provides both drainage and water retention while stopping roots from penetrating the waterproof membrane.
Highway & railway subgrades – removes trapped water to prevent frost heave and freeze-thaw damage.
Building basement waterproofing – installed against retaining walls to rapidly direct groundwater to sump pits.

2.2 Real Customer Example – Southeast Asian Landfill
An environmental engineering firm in Southeast Asia purchased a JWS150-3300 line to produce 3000 mm wide, 2.0 mm thick PE drainage boards. After commissioning, the line delivered a steady 520 kg/h output, operated continuously for 18 months with less than 2% downtime, and produced over 3500 tonnes of high-quality board. The 3-meter width reduced on-site welding overlaps by 40%, significantly lowering installation costs.

JWS130 – ideal for small to medium production or first – time buyers.
JWS150 – the best – selling, most balanced model for a wide range of projects.
JWS180 – meets large – project demands for extra width, heavy thickness, and high throughput.
Compared to conventional lines, the optimized barrier screw with grooved feed section cuts energy consumption per tonne by 12–15%.

3.2 Wide Width & Flexible Thickness – One Machine, Many Products
Widths from 2 m to 4 m directly match standard geosynthetic installation widths.
Thickness 0.5–3.3 mm – produce conventional 1.0 mm boards as well as heavy – duty 3.3 mm boards for truck – traffic areas or high – fill projects.

3.3 Designed Specifically for PE Materials
The extrusion system is tailored to the flow behavior of polyethylene. It runs smoothly on virgin resin as well as blends with a certain percentage of recycled PE (using a melt filter and stabilizers). The screw design allows low – temperature melt extrusion, minimizing gels and black specks.

3.4 Robust Mechanical Build
Extruders JWS130/150/180 – bimetallic alloy barrels with a wear – resistant layer (HRC 58–62).
High – torque gearbox – safety factor ≥1.8.
Precision temperature control – zone – to – zone fluctuation ≤ ±1°C.

To meet international standards like ASTM D7106 and GRI GM13, the JWS series uses a three – stage QC system.

4.1 Online Real – Time Monitoring
Ultrasonic thickness gauge – scans the full sheet width (up to 4000 mm); alarms when thickness deviates by more than ±5%.
Melt pressure & temperature sensors – installed before the die and at the adapter to monitor extrusion stability.
Automatic die (optional) – works with the thickness gauge for closed – loop adjustment, reducing manual tuning.

4.2 Offline Laboratory Spot Checks (per batch)

4.3 Real Customer Quality Data – German Tunnel Project
A German tunnel waterproofing manufacturer using a JWS180-4300 line to produce 3.3 mm thick drainage boards reported third-party SGS results:
Transverse thickness deviation ≤ ±0.05 mm across the full 4 m width.
Stable output of 680–695 kg/h during 120 consecutive hours.
Boards were free of bubbles and delamination, with uniform dimple height (±0.1 mm).

Q1: Can I use recycled PE material?
Yes. The JWS series can handle up to 50% clean, industrial recycled PE blended with virgin material. We recommend an 80-mesh or finer melt filter plus antioxidants. For 100% recycled content, a twin-vented screw design is available.

Q2: What is the typical power consumption per tonne for the JWS150-3300?
Based on multiple customer site measurements, the JWS150-3300 has a total installed power of about 320 kW. Actual consumption per tonne is 180–220 kWh (depending on board thickness, cooling water temperature, and runtime). At US$0.12/kWh, power cost per tonne is roughly US$22–27.

Q3: How long does it take to change product thickness?
The board width is fixed by the die (2000/3000/4000 mm) – no die change needed. To change thickness (e.g., from 1.0 mm to 2.5 mm), adjust screw speed, three-roll gap, and cooling parameters. Stable sheet production resumes within 20–30 minutes.

Q4: What roll size can the winder handle?
The standard configuration is a surface-friction automatic winder with shaftless chucks. Maximum winding diameter is 1200 mm, and roll weight can reach 400 kg. A turret-type dual-station winder is optional for non-stop roll changes.

Q5: How long is the investment payback period?
Based on actual data from a Vietnamese customer using a JWS150-3300:
CIF equipment price: approx. US$185,000
Daily output: 500 kg/h × 24 h = 12 tonnes/day
Net profit per tonne: about US$120
Daily net profit: US$1,440
Simple payback ≈ 130 production days (6–8 months). Most users recover their investment within 6 to 12 months.

Q6: How is uniform dimple height ensured?
Dimples are formed by a vacuum forming roll after the die. The JWS series uses a precision-engraved forming roll with independent temperature control (±2°C) and closed-loop vacuum control. The roll gap is automatically adjusted to keep dimple height tolerance ≤ ±0.1 mm.

Q7: Which spare parts do you recommend keeping in stock?
Recommended stock: heater bands (5% of total), breaker plates & screen packs (50 sets), thermocouples (10 pieces), gearbox lubricating oil pump (1 unit). For the cooling roll, we suggest having an extra chrome-plated smooth roll on hand for quick replacement if plating is damaged.
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