Specialist Products, Individual Solutions

LONGZHENG is your specialist for innovative and application-oriented plastic compounds. Our comprehensive knowledge of plastic compounding means we have the right solutions for your every compounding need.We produce over 12000 tonnes of plastic compounds every year and are constantly developing innovative new solutions for our customers.

We specialise in upgrading standards as well as technical plastics, designed for specific industries and applications. We serve customers around the world.

Introduction of our company

We welcome you to visit the official website of Longzheng Company. We hope that you can find advanced plastic technology and excellent engineering plastics here. We also hope that you can share your needs so that our technical personnel can provide you with professional technical analysis and assistance. We believe that you will achieve the desired results at Longzheng.

As an innovative enterprise deeply rooted in the field of modified plastics, we leverage cutting-edge technology to create benchmark products.

Our glass fiber-reinforced nylon material, PANG30, has earned the prestigious WRAS certification, demonstrating its compliance with the rigorous BS6920 standard. This certification confirms that the material meets stringent international requirements for water quality safety when in contact with drinking water. Through professional injection molding processes, we ensure the material’s consistent performance. From R&D to production, we strictly adhere to WRAS standards and implement a robust quality control system to maintain the material’s superior properties. The WRAS certification not only validates the product’s water safety but also reflects our unwavering commitment to excellence. By choosing our modified plastics, you opt for a solution backed by international certifications, providing reliable material support for drinking water contact applications, industrial components, and more, helping clients achieve high-quality projects.

Furthermore, our PANG30 nylon glass fiber-reinforced plastic has undergone rigorous testing by IAPMO R&T Laboratory, fully complying with the NSF/ANSI/CAN 61-2023 Standard, Part 4. It exhibits exceptional water safety performance in intermittent household hot water environments at 60°C. From sample preparation to testing, every step follows strict international protocols, verifying the material’s safety in key indicators such as heavy metal leaching and contaminant migration. With our expertise in modified plastics technology, we enhance material strength and stability through glass fiber reinforcement, earning not only the NSF certification but also the earlier WRAS certification, solidifying our international-level quality.

Whether for drinking water contact scenarios or industrial component applications, our products consistently deliver “safety + performance” excellence, providing global clients with trustworthy modified plastic solutions. Through our internationally certified quality, we redefine industry standards and set new benchmarks for excellence!