塑料门窗、塑料管材等PVC塑料制品,以其外观规整、耐腐蚀、造价低等优势,已成为代钢、代木、节能的新型建材。 有关资料表明,到目前为止,我国共有引进及国产的双螺杆塑料构件生产线300余条,大多用于生产PVC塑料门窗及异型材。塑料门窗 PVC plastic doors and windows, plastic pipes and other PVC plastic products, with its appearance of regularity, corrosion resistance, low cost and other advantages, has become the substitute steel, wood, energy-saving new building materials. Relevant data indicate that so far, China has imported and produced more than 300 twin-screw plastic component production lines, mostly used for the production of PVC plastic doors and windows and profiled materials. Plastic doors and windows