Founded in 1992, Longshan is an integrated company specializing in R&D, production and sales of modified plastics, focusing on the development of medium-to-high-end modified materials.
Jiangyin Longshan Synthetic Materials Co., Ltd. is a professional enterprise engaged in the R&D, production and sales of modified plastics, with a core focus on the development of high-performance and mid-to-high-end modified materials.
Adhering to strict international environmental standards, our factory fully complies with RoHS requirements to ensure safe and eco-friendly products. Relying on superior product quality, standardized production management and advanced technical strength, Longshan has built a distinguished reputation in the domestic modified plastics industry and continues to provide reliable material solutions for global customers.
Create high-value polymer materials, promote industrial upgrading, and contribute to a smarter and more sustainable future.
Become a world-leading high-end modified plastic solution provider and a benchmark enterprise in the new material industry.
Integrity-based, Innovation-driven, Quality-first, Customer-centric, Win-win cooperation.
Longshan possesses a modern production base spanning over 20,000 square meters, equipped with 9 sophisticated production lines and cutting-edge testing equipment. With an annual production capacity of more than 45,000 tons, the company ensures large-scale, stable and efficient output.
Our professional R&D center brings together senior engineers and seasoned material specialists, who continuously drive technological innovation and product optimization. By integrating forward-looking R&D strategy with standardized, automated manufacturing, we steadily enhance core competitiveness and provide reliable material solutions with consistent high quality.
National-level certification
Specialized & Sophisticated Enterprise
ISO9001/14001/IATF16949
International Safety Standard
Environmental Protection Certification
Panasonic Certified Supplier
60+ Utility Patents
AAA Level Credit Rating
Three decades of deliberate growth — hover each card to explore.
In-house lab since 2001. 60+ utility patents. Continuous material science research and formulation development for custom applications worldwide.
Automated production lines commissioned 2012. Precision manufacturing with SPC monitoring. Reliable, consistent output for global OEM partners.
ISO 9001 / 14001 / TS 16949 multi-system certified. UL Yellow Card. RoHS-compliant since 2005. Zero-compromise quality at every process step.
Long-term Panasonic supplier. International brand partnerships. Application-specific custom material engineering — not catalog products.
Longshan will continue to deepen technology innovation and management excellence — focused on premium customization, not indiscriminate scale. Guided by quality and service, we will steadily expand into automotive, build toward a platform enterprise, and set the benchmark for high-end modified plastics in China and globally.
Jiangyin Longshan Synthetic Materials Co., Ltd. is a modified plastics company integrating R&D, production and sales, specializing in the development of medium and high-end modified materials.
