China Recycled Plastic WPC Decking Production Line Manufacturer, Supplier, Factory

A PP Profile Making Machine is a critical piece of equipment in the plastic extrusion industry, enabling manufacturers to produce durable, lightweight, and customizable polypropylene profiles for construction, furniture, packaging, and industrial applications.

WPC doors and door frames are almost always made from PVC-based WPC, not PP or PE. PVC has much higher rigidity, strength, and dimensional stability. It does not bend or deform under sunlight or load, which is critical for door structures. PP and PE are too soft and flexible; they easily warp, sag, and change shape, making them unsuitable for door and door frame production.

These distinctions underscore that differences between outdoor and indoor WPCs—in raw material selection, formulation design, and equipment compatibility—originate fundamentally from divergent performance requirements dictated by their respective application environments. Outdoor applications emphasize long-term durability and environmental adaptability, driving material systems toward enhanced stability; indoor applications prioritize aesthetic appeal and process controllability, fostering more refined and versatile manufacturing techniques. This differentiation is reflected not only in the types and proportions of raw materials but also profoundly shapes the overall logic of production line configuration and the selection of critical components.

The common surface quality defects of WPC doors are closely related to raw material formula, auxiliary matching and production process parameters. Yellowing is dominated by thermal oxidation and auxiliary mismatch, streaks are caused by uneven mixing and insufficient plasticization, and brittle cracking is mainly attributed to excessive shear, overhigh temperature and unreasonable filler dosage. Through targeted temperature adjustment, formula optimization, process parameter matching and mixing process upgrading, the above defects can be effectively eliminated, so as to significantly improve the surface quality, mechanical performance and market competitiveness of WPC door products.

We have achieved a major technical milestone today with the successful commissioning and full performance testing of our new customized 50mm thick solid plastic lumber machine. This professional complete plastic lumber extrusion line is independently configured and optimized for thick solid plastic board production, specially designed for recycling and reusing waste PE (polyethylene) and PP (polypropylene) mixed plastic materials. The line is capable of stably producing standard 200mm-wide, 50mm-thick full-solid plastic boards, marking a key breakthrough in our high-value waste plastic recycling and thick profile precision manufacturing capacity.

Yongte's conical twin-screw extruders typically employ an elastic coupling connection method; however, in response to a specific customer requirement, Yongte engineers have specially designed and manufactured a batch of conical twin-screw extruders featuring a flange-based rigid direct connection – these units are primarily used for the extrusion production of PVC window profiles.