Stone-plastic hot pressing flooring and manufacturing method thereof

A manufacturing method of stone-plastic hot pressing flooring, wherein the stone-plastic hot pressing flooring comprises

• a stone-plastic base material part, comprising a middle material layer, a stone-plastic substrate layer, and a bottom material layer sequentially arranged side by side;
• a color film layer, located at one side of an upper surface of the stone-plastic base material part;
• a first wear-resistant layer, located at one side of an upper surface of the color film layer;
• and
• a second wear-resistant layer, located at one side of a lower surface of the stone-plastic base material part;
• wherein both the middle material layer and the bottom material layer are mainly composed of polyvinyl chloride, plasticizer, stabilizer, carbon black, and stone powder,
• the manufacturing method comprising the following steps:
• adding and mixing raw materials of the bottom material layer to obtain a bottom material layer intermediate, and then internal-mixing and calendering the bottom material layer intermediate to obtain a bottom material layer sheet;
• adding and mixing raw materials of the middle material layer to obtain a middle material layer intermediate, and then internal-mixing and calendering the middle material layer intermediate to obtain a middle material layer sheet;
• mixing, internal-mixing, and calendering raw materials of the stone-plastic substrate layer to obtain a stone-plastic substrate layer sheet;
• sequentially arranging a first wear-resistant layer film, a color film, the middle material layer sheet, the stone-plastic substrate layer sheet, the bottom material layer sheet, and a second wear-resistant layer film, and then carrying out a hot pressing process to obtain a finished product;
• and
• a cold pressing process, wherein the cold pressing process is carried out after the hot pressing process and comprises a first cold pressing process and a second cold pressing process.