Four-layer-color synthetic resin block and preparation method thereof
A synthetic resin, the fourth technology, applied in the direction of synthetic resin layered products, chemical instruments and methods, layered products, etc., can solve the problems of increased workload, increased production costs, single color of dental models or temporary crowns and bridges, etc. Achieve the effects of low production cost, high dimensional stability and excellent processing performance
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Embodiment 1
[0027] (1) Drying of raw materials: dry the polymethyl methacrylate powder at 80°C.
[0028] (2) Color matching and kneading: prepare four layers of materials according to the ratio, mix each layer of materials evenly, knead until the dough stage, and form plastic dough materials;
[0029] (3) Hot-pressing forming: four layers of plastic dough materials are hot-pressed and combined in order in the mold, the hot-pressing temperature is 110°C, and the hot-pressing time is 10 minutes. Among them, the mold size is the thickness of the first layer: 4mm, the thickness of the second layer: 3mm, the thickness of the third layer: 3mm, the thickness of the fourth layer: 4mm, and the external dimension is Φ98.5*14mm.
[0030] (4) Heat treatment: heat-treat the hot-pressed four-layer synthetic resin block at 80° C. for 10 hours to obtain a finished four-layer synthetic resin block.
[0031] Wherein, the mass percentages of each component of the four layers of materials are respectively: ...
Embodiment 2
[0037] (1) Drying of raw materials: dry the polymethyl methacrylate powder at 85°C.
[0038] (2) Color matching and kneading: prepare four layers of materials according to the ratio, mix each layer of materials evenly, knead until the dough stage, and form plastic dough materials;
[0039] (3) Hot-pressing forming: Four layers of plastic dough materials are hot-pressed and combined in sequence in the mold, the hot-pressing temperature is 110°C, and the hot-pressing time is 15 minutes. Among them, the mold size is the thickness of the first layer: 5mm, the thickness of the second layer: 4mm, the thickness of the third layer: 4mm, the thickness of the fourth layer: 5mm, and the external dimension is Φ98.5*18mm.
[0040] (4) Heat treatment: heat-treat the hot-pressed four-layer synthetic resin block at 85° C. for 12 hours to obtain a finished four-layer synthetic resin block.
[0041] Wherein, the mass percentages of each component of the four layers of materials are respectivel...
Embodiment 3
[0047] (1) Drying of raw materials: dry the polymethyl methacrylate powder at 90°C.
[0048] (2) Color matching and kneading: prepare four layers of materials according to the ratio, mix each layer of materials evenly, knead until the dough stage, and form plastic dough materials;
[0049](3) Hot-pressing forming: four layers of plastic dough materials are hot-pressed and combined in sequence in the mold, the hot-pressing temperature is 125°C, and the hot-pressing time is 20 minutes. Among them, the mold size is the thickness of the first layer: 6mm, the thickness of the second layer: 4mm, the thickness of the third layer: 4mm, the thickness of the fourth layer: 6mm, and the external dimension is Φ98.5*20mm.
[0050] (4) Heat treatment: heat-treat the hot-pressed four-layer synthetic resin block at 90° C. for 12 hours to obtain a finished four-layer synthetic resin block.
[0051] Wherein, the mass percentages of each component of the four layers of materials are respectively...
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