Composite and method for forming the same

A method for forming composite, comprising:

• providing a polypropylene homopolymer and at least one kind of inorganic particles to a twin screw extruder, wherein said polypropylene homopolymer occupies 40 wt % to 90 wt % of the composite, said at least one kind of inorganic particles occupies 10 wt % to 60 wt % of the composite, the melt flow index of the polypropylene homopolymer is lower than 3.6 g/10 min, and the particle sizes of the inorganic particles are in a range of 100 nm to 1000 nm;
• heating the polypropylene homopolymer to a molten state;
• and
• enabling the molten-state polypropylene homopolymer and the inorganic particles to pass through said at least five kneading blocks of the twin screw extruder to be mixed together such that the inorganic particles are dispersed in the polypropylene homopolymer, wherein adjacent two of the kneading blocks are interspaced by 0.5 to 2 screw pitches.