Plastic-based binder for self-ligating bracket and preparation method of plastic-based binder

The invention relates to the field of binders, in particular to a plastic-based binder for a self-ligating bracket and a preparation method of the plastic-based binder. Wherein the plastic-based binder comprises the following components in percentage by mass: 3.5-7% of high-density polyethylene; 3.2%-4.5% of wax; 1.6 to 3 percent of ethylene-vinyl acetate copolymer; 2.2-4% of oleic acid; 0.6%-1.5% of a dispersing agent; 1-2.5% of soluble polytetrafluoroethylene; the balance at least comprises homo-polyformaldehyde, and the mass fraction of the homo-polyformaldehyde in the plastic-based binder is not less than 80%. The plastic-based binder can maintain good mechanical properties, has excellent fluidity, and is helpful for improving the processability of the plastic-based binder. 本申请涉及粘结剂领域，具体涉及用于自锁托槽的塑基粘结剂及其制备方法。其中塑基粘结剂按照质量分数包括如下组分：高密度聚乙烯：3.5～7%；蜡：3.2～4.5%；乙烯-醋酸乙烯共聚物：1.6～3%；油酸：2.2～4%；分散剂：0.6～1.5%；可溶性聚四氟乙烯：1～2.5%；余量中至少包括均聚甲醛，均聚甲醛占塑基粘结剂的质量分数不少于80%。上述塑基粘结剂可以在保持力学性能良好的同时，具备较为出色的流动性，有助于提高塑基粘结剂的加工性能。