Laiwu Zhengqi Plastic Machinery Co., Ltd. integrates research and development, design and manufacture. The science and technology play a leading role in our company. Our company has been entitled as an important high and new tech enterprise and Shandong Province multilayer co-extrusion plastic processing equipment R&D center. At the same time, our company passed ISO9001:2000 certification.



Our company emphasizes the combination of independent research and development. At present, our company has many national patents. The main products of our company are single-screw and...