Explore our high-capacity engineering systems customized for architectural sheets, protective barriers, optical-grade boards, and advanced solar encapsulation applications.
In modern architecture, the demand for transparent structural balustrades has triggered a shift from brittle soda-lime glass to advanced, multi-layer co-extruded polymer sheets. A PC/PMMA Co-extruded Sheet Extrusion Line is designed to combine the distinct mechanical and physical profiles of Polycarbonate (PC) and Polymethyl Methacrylate (PMMA) into a monolithic composite sheet.
Polycarbonate (PC) provides the core structural integrity. With an impact strength approximately 250 times greater than glass and 30 times higher than PMMA, PC serves as an shatter-proof core that meets global safety codes for public railings, commercial atriums, and residential stairwells. However, bare PC is vulnerable to surface scratches, chemical degradation, and UV-induced yellowing.
Polymethyl Methacrylate (PMMA / Acrylic) acts as the protective outer layer. Boasting a light transmission rating of up to 92%, PMMA delivers optical clarity and superior scratch resistance (with a pencil hardness rating of 2H to 3H). Crucially, PMMA is highly resistant to ultraviolet radiation, preventing UV-induced degradation of the underlying polycarbonate.
| Physical Property | Polycarbonate (PC) Core | PMMA Outer Layer | Co-Extruded PMMA/PC Composite |
|---|---|---|---|
| Impact Strength (Charpy) | > 70 kJ/m² (Non-shattering) | 1.5 - 2 kJ/m² (Brittle under impact) | > 55 kJ/m² (Shatter-Proof) |
| Surface Hardness (Pencil) | 2B - B (Easily scratched) | 2H - 3H (Highly scratch resistant) | 2H - 3H (Optically durable) |
| Light Transmission (%) | 86% - 89% | 92% | 89% - 91% (Glass-like clarity) |
| UV Yellowing Resistance | Poor (Requires stabilizer/cap layer) | Excellent (Inherently UV stable) | Excellent (Long lifespan outdoors) |
Building an extrusion line that can handle the raw processing temperatures of both PC (260°C – 300°C) and PMMA (220°C – 250°C) without thermal degradation or delamination requires highly specialized machinery components.
We incorporate precise multi-flow channel feedblocks featuring internal adjustment pins. This enables real-time regulation of the PMMA layer thickness (typically 50 to 100 microns) on one or both sides of the thick PC core, ensuring a consistent layer ratio across the entire width of the die.
Both PC and PMMA are highly hygroscopic. Our screws feature multi-stage venting zones backed by high-vacuum pumps. This setup removes trace moisture and monomers directly from the polymer melt, preventing the formation of micro-voids, silver streaks, and optical hazes.
To produce sheets with glass-like surface finishes, our calender systems utilize independent servo-motor controls and internal oil-heating circulation. This layout controls the temperature profile across the rolls, minimizing residual stress and prevention of optical distortion.
China’s heavy machinery and extrusion equipment industries have evolved from copying Western layouts to leading in intelligent system design. Partnering with a specialized Chinese factory like GWELL Machinery provides significant competitive advantages for international plastics processors:
China GWELL Machinery is a high-tech enterprise dedicating to the manufacture of plastic extrusion lines for Film, Sheet and Profile. Relying on the powerful technology and equipment of the group and an innovative engineering spirit, GWELL commits to the development of high-tech products and international markets. “Expertise creates customers’ values” has always been our operating philosophy.
Collaborate with leading research universities to develop high-speed extruders, screw geometries, and co-extrusion feedblock technologies.
We provide comprehensive lifecycle support, including factory layout planning, remote diagnostics, on-site commissioning, and regular maintenance visits.
Three advanced manufacturing complexes in China enable GWELL to deliver even complex multi-layer sheet extrusion lines on tight schedules.
With systems deployed globally, GWELL machinery is designed to comply with local industrial regulations, electrical standards, and safety certifications.
Our workforce includes over 100 dedicated R&D engineers and automation specialists focused on improving polymer processing efficiency.
We build specialized downstream and upstream systems tailored to different types of polymer sheet and board processing.
In high-traffic areas, co-extruded architectural panels require multi-layered structures. Incorporating an A/B/A block allows manufacturers to use recycled PC or impact-modified cores (B) wrapped in thin protective PMMA outer layers (A). This approach lowers material costs while maintaining the sheet's look and UV resistance.
Sustainability initiatives are pushing architectural suppliers to use recycled resins. Processing recycled PC flakes requires extruders with vacuum degasification and melt filters. This ensures contaminants are removed before the melt reaches the die, maintaining structural safety standards.
Modern B2B manufacturers require closed-loop feedback systems. By integrating scanning sensors with automated die lips, the system measures sheet thickness in real time. The PLC automatically adjusts the thermal expansion bolts on the die lip to correct variations, keeping tolerances within ±0.05 mm.
Used in high-end commercial complexes, airports, and public atriums where high light transmission must be paired with shatter-proof safety.
Engineered for high UV and salt spray exposure, outlasting standard polycarbonate by shielding the core with weather-resistant PMMA.
Installed along expressways and railways, requiring high impact strength alongside long-term optical clarity.
Our production processes and structural designs comply with international safety regulations, mechanical codes, and quality management protocols.
Gwell presented its latest multi-layer co-extrusion machinery, showcasing real-time thickness control and energy-saving designs.
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Our R&D team successfully developed an eco-friendly POE leather manufacturing line, broadening options for sustainable design.
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Gwell's PVB wedge film line features advanced gap control and stable cooling, targeting the automotive safety HUD market.
Read MoreWe maintain long-term partnerships with raw material suppliers, technical institutions, and industrial component manufacturers to ensure equipment reliability.
Explore our complete catalog of industrial polymer extrusion equipment for films, boards, and functional technical applications.
Our R&D team and manufacturing capabilities are recognized across the industry. Contact our application engineers today for tailored layouts, technical specifications, and factory quotations.
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