Composite profile and producing method thereof

A method for producing a composite profile, the method comprising:

• a first stage of feedstock preparation, which comprises:
• providing a waste plastic or new plastic as a main feedstock, which is any one selected from polypropylene, polyethylene, polyvinyl chloride, or HDPE;
• providing a plant fiber as an auxiliary feedstock, wherein the plant fiber is crushed into a 40-80 mesh powder with a rolling machine;
• providing a 300-800 mesh mineral powder as the filler;
• and
• providing a chemical reagent capable of coupling action as an additive;
• a second stage of mixing materials, wherein 30-55 wt % of the main feedstock, 38-55 wt % of the auxiliary feedstock, 5-30 wt % of the filler, and 2-6 wt % of the additive are loaded into a mixer, heated and mechanically mixed, and then granulated into particles, which are for later use as a starting material for the production of the inner core of the profile body;
• and
• a third stage of production of the profile body through a production line with co-extruding apparatuses, which comprises feeding the starting material obtained in the second stage into a hopper of an extruder for the production of the inner core of the profile body, feeding at the same time a new plastic of the same type as the main feedstock as a starting material for the protective film layer into another hopper of the extruder, starting the extruder, use a co-extruding mold to extrude the melted starting material for the inner core and the starting material for the protective film layer in a co-extruding manner to carry out the extrusion of the inner core and the protective film layer synchronously, and then cooling and molding in a cooling-forming-machine to thereby forming the profile body, wherein during the co-extruding process, the inner core and the protective film layer are tightly combined into one piece since they have consistent thermoplastic properties.