China PC Sheet Production Plant Manufacturer & Manufacturers

Polycarbonate is highly sensitive to moisture at high temperatures. To prevent hydrolytic degradation, the raw material must undergo intensive pre-drying in a dehumidifying dryer. The target moisture level should be kept under 0.02% by weight. Processing wet resin leads to polymer chain breakdown, which manifests as structural bubbles, loss of impact strength, and reduced transparency.

Unprotected polycarbonate degrades rapidly under solar UV radiation, leading to yellowing, embrittlement, and surface cracking. By co-extruding a thin, concentrated UV-blocking layer (typically 30–50 microns thick) on the outer surface, we shield the underlying PC core. This structure extends the lifetime of skylights, sound barriers, and architectural roofing up to 10 years or more.

Our lines integrate high-precision melt gear pumps that stabilize polymer output pressure. Combined with automatic adjustment systems on the extrusion die (e.g., automatic lip adjustment via thermal expansion bolts) and online beta or laser thickness scanners, the system regulates thickness profiles in real-time, achieving thickness tolerances within ±1% across the sheet width.

Key parameters include: screw diameter and L/D ratio (typically 30:1 to 35:1 for optimal homogenization), heating power zones, maximum calendering roller diameter, cooling system capacity, and PLC integration depth. Ensure the manufacturer offers high-performance drying/crystallizer units and utilizes bimetallic components to resist abrasion from reinforced compounds.

Yes. Our modular design allows operators to configure lines for PMMA, GPPS, MS, and ABS with minimal hardware modification. By adjusting the screw configuration, calibration temperature parameters, and feedblock inserts, the plant can produce high-quality diffusion plates, sanitizing barriers, and custom engineering panels.