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On May 10, Guangxi Petrochemical announced a significant achievement: the successful production of GPPS-550N, a high-quality, optical-grade polystyrene developed entirely in-house. This milestone marks an original breakthrough for the company in the field of high-end optical-grade chemical materials and injects strong momentum into achieving self-reliance and control within the domestic optical materials supply chain.
At 9:00 AM on May 8, the 300,000-ton-per-year polystyrene unit at Guangxi Petrochemical began the process of switching production line grades. Leveraging the unit's process system, the technical team identified key process control points and precise additive dosages, monitored polymerization reaction status and equipment loads in real-time, closely coordinated with laboratory analysis data, and dynamically fine-tuned process parameters to ensure stable and controlled production throughout the process. Following 40 hours of continuous, intensive effort and precise adjustments, the unit successfully produced compliant material that was routed to the dedicated product silo. This marked the achievement of stable, mass production of the company's first batch of optical-grade GPPS-550N, with all key performance indicators meeting standards on the first attempt.
GPPS-550N is a specialized, highly transparent material with a neutral (white) base tone. Benchmarked against top-tier industry grades, it boasts outstanding advantages—such as high light transmittance, superior thermal stability, and excellent safety compliance—fully meeting the technical requirements for high-end optical-grade products. Targeting high-end applications like LED LCD displays and optical light-guide components, the product precisely addresses the urgent market demand for high-quality optical-grade polystyrene and fills a regional gap for such high-end materials. Its successful launch further diversifies the enterprise's portfolio of new chemical materials, positions the company to capitalize on growth opportunities in the optical materials sector, and extends the integrated refining-chemical industry chain.
Guangxi Petrochemical’s 300,000-ton-per-year polystyrene unit features three specialized production lines, each with an annual capacity of 100,000 tons. These lines offer flexible switching capabilities to produce multiple grades across two major series: general-purpose and high-impact polystyrene. The facility provides a robust hardware foundation for the R&D, customized production, and large-scale supply of high-end new materials, offering strong support for the future iteration and upgrading of the optical-grade product series.
