Preparation method of heat-resistant bottle cap sealing material

The invention belongs to the technical field of macromolecules, and particularly relates to a preparation method of a heat-resistant bottle cap sealing material, polypropylene, polyethylene, ethylene propylene rubber, silica gel, a polyhydroxy compound and a filler are added according to the proportion, and the heat-resistant bottle cap sealing material is obtained after mixing and processing. Polyethylene, polypropylene and ethylene propylene rubber are utilized to form an organic frame structure based on polyethylene and polypropylene, silica gel and filler are matched to form a silica system inorganic frame, a double frame is formed, the current bottle cap quality requirement is met, and 90 DEG C/15 min pasteurization and 121 DEG C/30 min high-pressure steam sterilization can be borne. 本发明属于高分子技术领域，具体涉及一种耐热型瓶盖密封材料的制备方法，按照比例加入聚丙烯、聚乙烯、乙丙橡胶、硅胶、多羟基化合物和填料，并混合加工后得到耐热型瓶盖密封材料。本发明利用聚乙烯、聚丙烯和乙丙橡胶形成聚乙烯和聚丙烯为基础的有机框架结构，配合硅胶与填料形成硅氧体系无机框架，形成双重框架，满足目前的瓶盖质量需求，能够承受90℃/15min的巴氏杀菌以及121℃/30min的高压蒸汽杀菌。