A fluidized-bed coater was used to coat the pellets, and the coating formulations were optimized by orthogonal design.结果优化条件所得的微丸综合质量评价指标达到优秀，体外释放符合一级释药模型。
The test result shows that the apparent viscosity of bentonite drilling fluid increases % when % QYJ is added,which is b试验表明:%QYJ膨润土表观黏度上升率仅为%,优于聚丙烯酸钾、两性离子强力包被剂FA 7和0%KC l;