Sinopec Yizheng Chemical Fiber has achieved the first industrial-scale production of GN811, a tailor-made PETG polyester material dedicated to high-performance 3D printing.
R&D engineers from Yizheng Chemical Research Institute stayed on-site at the No.2 Synthetic Fiber production workshop throughout the commissioning phase. After rounds of parameter adjustment, comparison tests and process optimization, highly transparent spherical resin pellets were steadily produced from the production line. All core indicators of GN811, including material fluidity and color phase, have fully met customized design standards. The successful mass production of this specialized PETG provides a brand-new material solution for FDM (Fused Deposition Modeling) 3D printing.
These plain-looking resin pellets represent a rising star for the additive manufacturing sector, and mirror Sinopec’s strategic transformation toward high-end, functional and differentiated polyester materials.
As one of the dominant feedstocks for mainstream FDM 3D printing, PETG is widely recognized for balanced mechanical properties. It delivers higher toughness and heat resistance than PLA (Polylactic Acid), and outperforms traditional ABS copolymer with odor-free printing performance and excellent warpage resistance. Serving as Sinopec’s core production hub for mid-to-high-end polyester products, Yizheng Chemical has capitalized on its mature fiber manufacturing strengths to expand into booming emerging markets such as additive manufacturing. The company built an integrated team covering research, production, marketing and end-user application, kicking off independent innovation of premium 3D printing materials. The R&D team set a stringent target: not only matching mainstream commercial products, but surpassing their overall performance.
Chang Yu, a researcher at Yizheng Chemical Research Institute, recalled the arduous technology iteration process. “The laboratory was totally different one year ago. We worked overnight on a daily basis, with experimental samples filling every corner of the lab.” To tackle core technical bottlenecks including conflicting fluidity and thermal stability, color purity defects and insufficient interlayer bonding strength, the team conducted massive trials based on molecular design. Researchers revised molecular chain structures more than 100 times, repeating experiments from scratch time and again, until locking down the optimal formula.
The optimized GN811 boosts the L-b color phase value by 4 units and raises the melt flow index by 10% compared with peer products. The upgraded property greatly improves extrusion smoothness, eliminates common nozzle clogging failures, and fits long-duration, high-precision industrial printing scenarios perfectly.
In mid-May 2026, the R&D team delivered finished GN811 samples to a professional 3D printing material manufacturer in Jiangsu for field application tests. During hours of continuous non-stop printing, GN811 operated stably without abnormal fluctuations. The printed products featured sharp edges, tight interlayer adhesion and zero cracking. Furthermore, the material generates no irritating odor during processing and supports recyclability, delivering remarkable environmental advantages.
Field engineers spoke highly of the new material. They pointed out that GN811 solves long-standing industrial pain points of delamination and cracking of conventional 3D printing materials. Its thermal stability and interlayer bonding strength exceed existing commercial alternatives, fully meeting strict requirements for industrial functional parts and structural components.
Currently, GN811 has passed practical verification from multiple filament manufacturers and downstream end users. To satisfy customized demands from diverse clients, the R&D team keeps iterating material formulas and developing serialized products, accelerating the industrial-grade and functional upgrading of FDM 3D printing technology.
“During the upcoming 15th Five-Year Plan period, we will comprehensively strengthen scientific and technological innovation, deepen industry-university-research collaboration, and build an integrated industrial chain covering R&D, pilot tests and commercial production. We will accelerate the transformation of R&D achievements, deliver high-performance, multi-functional material solutions for global manufacturers, and sharpen Sinopec’s competitiveness in the high-end new material industry,” said a senior official of Yizheng Chemical Research Institute.
