阅读说明：本技术 一种热膨胀微球及其制备方法 (Thermal expansion microsphere and preparation method thereof ) 是由 柯伟强 于 2021-07-23 设计创作，主要内容包括：本发明公开了一种热膨胀微球及其制备方法,所述热膨胀微球具有复合微球结构,包含外层和内层,其中外层为聚合物层,内层为包含若干小微球及固体颗粒的混合层,所述小微球包含壳材及芯材,所述固体颗粒与芯材接触后发生化学反应并释放出气体。本发明通过化学反应进行发泡,从而可以不使用市面上常见的低沸点烷烃发泡剂,在不影响发泡效果的前提下,解决了传统发泡剂的出油问题,是一种性能良好,能够运用于日常生活用品的热膨胀微球,其可以运用于TPE发泡日用材料中,并且由于其不出油的特性,能够用于制作贴身使用的材料。本发明采用的是二段发泡的方式,最终发泡结构更加的稳定。(The invention discloses a thermal expansion microsphere and a preparation method thereof, wherein the thermal expansion microsphere has a composite microsphere structure and comprises an outer layer and an inner layer, wherein the outer layer is a polymer layer, the inner layer is a mixed layer containing a plurality of small microspheres and solid particles, the small microspheres comprise a shell material and a core material, and the solid particles are in contact with the core material and then undergo chemical reaction to release gas. The foaming agent disclosed by the invention is foamed through a chemical reaction, so that a common low-boiling-point alkane foaming agent on the market is not used, the problem of oil production of a traditional foaming agent is solved on the premise of not influencing the foaming effect, and the foaming agent is a thermal expansion microsphere which has good performance, can be applied to daily necessities, can be applied to TPE (thermoplastic elastomer) foaming daily materials, and can be used for manufacturing materials used next to the skin due to the characteristic of no oil production. The invention adopts a two-stage foaming mode, and the final foaming structure is more stable.)