PVC Wallboard Extruder Extrusion Line

Our extrusion lines are widely used for the production of the following products:
Interior decorative PVC wallboards (bathrooms, kitchens, hotel lobbies)
Waterproof ceiling panels for coastal or humid areas
Wainscoting and cladding panels (widths from 50 mm to 800 mm)
Co-extruded two-color or UV-protected panels for outdoor applications
Actual case: A manufacturer in Vietnam installed a JWS100/33+JWS65/33 line (output 200-300 kg/h, width 400-600 mm) to produce 550 mm embossed wallboards. Within 3 months, thanks to the consistency of two-stage mixing, they reduced material waste by 12% compared to single-screw lines.
Another example: A customer in Nigeria uses a JWS75/33+JWS45/33 with YF400 downstream equipment to produce 350 mm wallboards at 130 kg/h for affordable housing projects – achieving a perfect balance between speed and surface gloss.

Based on field feedback and technical audits, the following advantages stand out:
2.1 High Output with Low Energy Consumption
The 33:1 L/D ratio screw provides excellent plasticizing capability, enabling the JWS120/33+JWS65/33 to reach an output of 400 kg/h while saving 15-18% electricity compared to conventional 30:1 designs.
2.2 Wide and Flexible Width Range
From 50 mm (suitable for edge trims) to 800 mm (large-format wallboards) – all on one modular platform. Switching between YF300, YF400, YF600, or YF800 downstream units can be completed within 4 hours.
2.3 Superior Surface Quality Thanks to Two-Stage Design
The main extruder (e.g., JWS75/33) handles melting and conveying; the secondary extruder (JWS45/33) acts as a low-pressure homogenizer, eliminating fisheyes and weld lines. This is critical for high-gloss or wood-grain finished PVC wallboards.
2.4 Stable Co-extrusion Capability
Ideal for adding a thin ASA or PVC cap layer without additional equipment – raw material costs can be reduced by up to 20% compared to single-layer panels.

Each line undergoes a nine-step QA process before leaving our factory. The following is our actual procedure:

Actual case: During FAT for a JWS100/33+JWS65/33 line destined for Poland, we observed width fluctuation of 0.3 mm over 6 hours – well below the 0.5 mm tolerance. The customer's own QA team confirmed the boards met EN 13245-2.

Q1: How do I choose among the four models?
A: Match according to your target daily output and wallboard width.
For decorative lines or narrow boards 50-300 mm → JWS65/33+JWS45/33 (60-90 kg/h) with YF300.
For standard wallboards (400-600 mm) → JWS100/33+JWS65/33 (200-300 kg/h) – most popular choice worldwide.
For high-volume 800 mm wallboards → JWS120/33+JWS65/33 (300-450 kg/h) with YF800.

Q2: What if my wallboard width changes after purchase?
A: All downstream models (YF300 to YF800) are interchangeable on the same main frame. You only need to replace the calibrator, puller, and cutter – no need to buy a new extruder.

Q3: How often should I replace the screws?
A: For standard PVC (CaCO₃ addition ≤15 phr), the bimetal screw life is 8,000-10,000 hours. Actual case: A customer in Saudi Arabia using 20% limestone filler needed replacement after 6,500 hours. With our optional screw hardening treatment, life can be extended to 12,000 hours.

Q4: My wallboard has intermittent surface roughness. What is the problem?
A: Likely PVC degradation or insufficient venting. Check three things:
Melt temperature at the die – should be 170-185°C (use infrared sensor)
Vacuum vent port on the JWS45/33 secondary extruder – ensure suction reaches at least -0.06 MPa
Screen pack condition – replace if pressure drop exceeds 8 MPa
Actual troubleshooting: A Thai customer reported surface shark-skin on 600 mm wallboards. We found the screw speed of the JWS65/33 secondary extruder was too high (25 rpm vs recommended 18 rpm). After reducing speed, gloss improved by 40%.

Q5: Can this line process recycled PVC?
A: Yes, but limited to 30% of the total formulation. The two-stage design (JWS main + JWS secondary) provides additional degassing capacity, so volatiles from recycled material are effectively removed. Always use a melt filter (optional 120 mesh).

Q6: Can I just replace the screw on my existing extruder to reach the output of your series?
A: Not recommended. Our JWS series uses a two-stage main+secondary configuration (e.g., JWS100/33+JWS65/33) with both main screws at 33:1 L/D and an independent secondary plasticizing unit. Simply changing a single screw cannot replicate the two-stage venting and low-pressure stable output. Actual tests show that forcing higher output on a conventional single screw easily causes surface ripples or scorching, whereas our two-stage design maintains thickness tolerance of ±0.1 mm even at 200-300 kg/h.