Orthodontic correction composite material and preparation method thereof
A composite material and orthodontic technology, applied in the field of medical materials, can solve the problems of insufficient elastic recovery force in mechanical properties, insufficient stress teeth, insufficient orthodontic force, etc., to achieve excellent stability, excellent performance, and good display effect of effect
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[0071] Examples 1-10
[0072] The components and contents are as follows:
[0073]
[0074] in,
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[0075] The preparation method of embodiment 1-3 is as follows:
[0076] 1) All raw materials are dried and pretreated. The drying temperature of PETG, polycarbonate and ethylene vinyl acetate copolymer is 70°C, and the drying temperature of chain extender and light calcium carbonate is 45°C, and drying is performed for 7 hours;
[0077] 2) Select surface-treated light calcium carbonate, chain extender and ethylene vinyl acetate copolymer to melt blend and granulate;
[0078] 3) blending the granules obtained in step 2) and polycarbonate together and melt granulation;
[0079] 4) melt-blending and granulating polyethylene terephthalate-1,4-cyclohexane dimethanol ester together with the pellets obtained in step 3);
[0080] 5) The granules of step 4) are melted and granulated again to obtain a composite material for orthodontic treatment.
[0081] In steps 2), 3), 4) and 5), the melt extrusion process is extruded by a twin-screw extruder.
[0082] The twin-screw extruder is a...
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