Pattern aligning hot-pressing process of stone-plastic floor

[0034] Embodiment one:

[0035] A flower-to-flower hot-pressing process for stone-plastic flooring, comprising the following steps:

[0036] Step A: Preparation of materials for each layer, manufacturing of the stone-plastic substrate layer, the stone-plastic substrate layer is composed of the following raw materials in parts by weight: 50 parts of polyvinyl chloride, 150 parts of stone powder, 6 parts of calcium zinc stabilizer, 0.35 parts of stearic acid part, 5 parts of PVC modifying agent, 0.2 part of carbon black, 0.6 part of polyethylene wax; Described PVC modifying agent is the acrylic resin taking methylmethacrylate as the main body. The production steps of the stone-plastic substrate layer include: step A1: batching, weighing and mixing polyvinyl chloride, stone powder, calcium zinc stabilizer, stearic acid, PVC modifier, carbon black and polyethylene wax; A2: High-speed heating and stirring, put the mixture in step A1 into the mixer and gradually heat up to 110°C-120°C and high-speed stirring at a speed of 2000 rpm; Step A3: Low-speed cooling and stirring, after high-speed heating and stirring, gradually Cool down to 40°C-50°C and stir at a low speed of 200 rpm; Step A4: Preliminary molding, put the stirred mixture into a twin-screw extruder for extrusion molding; Step A5: Determine the thickness, put The preliminarily formed sheet material is passed between two gauge rollers to determine the thickness of the stone-plastic substrate; step A6: air cooling, cooling at a room temperature of 25°C; step A7: cutting, according to actual needs after cooling The stone-plastic substrate is cut to length.

[0037] Both the wear-resistant layer and the color film layer are made of PVC material, and when the pattern is printed on the surface of the color film layer, the first cursor is directly marked on the edge of the color film layer, and one of the positions of the printed pattern is indicated by the first cursor, and The surface area of ​​the wear-resistant layer is set to be smaller than the surface area of ​​the color filter layer, so that it is convenient to use the first cursor for flower alignment in the later stage.

[0038] Step B: making dots on the embossed board, engraving a second cursor on the bottom surface of the embossed board and the position of the pattern corresponding to the first cursor on the color film layer, so that the positions of the patterns marked by the first cursor and the second cursor coincide;

[0039] Step C: For flower alignment, place the embossed board, wear-resistant layer, color film layer, and stone-plastic substrate layer from top to bottom, and align the first cursor on the color film layer with the second cursor on the embossed board In the process of aligning: step C1: turn the embossed plate over so that the bottom surface with the second cursor is facing up; step C2: turn over the wear-resistant layer and the color film layer; step C3: turn the color film layer Align the first cursor and the second cursor on the screen; step C4: stick double-sided tape on the edge of the color film layer facing the embossed plate, and stick the color film layer to the embossed plate;

[0040] Step D: hot pressing, use a hot pressing machine to carry out hot pressing and compounding of each layer of materials stacked in step C. The hot pressing temperature is between 130°C and 140°C, and the pressure is between 8MPa and 10MPa. After the hot pressing is completed Reduce the temperature in the hot press to between 25°C and 30°C, and remove the embossed plate from the uppermost layer;

[0041]Step E: Coating, coating the UV cured layer on the surface of the wear-resistant layer after hot pressing, and placing the coated stone-plastic floor in an environment of 23°C-25°C for 24 hours;

[0042] Step F: Slicing and slotting, slice and groove the stone-plastic floor after curing, cut the edge of the whole stone-plastic floor, and then remove the edge part with the first cursor .

[0043] Embodiment two:

[0044] A flower-to-flower hot-pressing process for stone-plastic flooring. The difference from Example 1 is that the stone-plastic substrate layer is composed of the following raw materials in parts by weight: 65 parts of polyvinyl chloride, 190 parts of stone powder, and 8 parts of calcium-zinc stabilizer. part, 0.65 part of stearic acid, 8 parts of PVC modifier, 0.4 part of carbon black, 0.8 part of polyethylene wax.