Stone-plastic hot pressing flooring and manufacturing method thereof
The present invention provides stone-plastic hot pressing flooring including a stone-plastic base material part which includes 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; and wherein the middle material layer and the bottom material layer are mainly composed of polyvinyl chloride, plasticizer, stabilizer, carbon black, and stone powder.
1. 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.
2. The manufacturing method of the stone-plastic hot pressing flooring according to claim 1 , wherein in the hot pressing process, a pressure is controlled in a range of 3-6 MPa, a temperature is controlled in a range of 125-145° C., and hot pressing time is controlled in a range of 1500-2100 s.
3. The manufacturing method of the stone-plastic hot pressing flooring according to claim 1 , wherein in the first cold pressing process, a pressure is controlled in a range of 5-8 MPa, a temperature is controlled in a range of 80-145° C., and cold pressing time is controlled in a range of 600-800 s.
4. The manufacturing method of the stone-plastic hot pressing flooring according to claim 1 , wherein in the second cold pressing process, a pressure is controlled in a range of 8-15 MPa, a temperature is controlled in a range of 23-80° C., and cold pressing time is controlled in a range of 800-1000 s.
5. The manufacturing method of the stone-plastic hot pressing flooring according to claim 1 , wherein after calendering the bottom material layer intermediate or the middle material layer intermediate or the stone-plastic substrate layer, further comprising a slicing operation.