The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2026
Filed:
Nov. 07, 2022
China Petroleum & Chemical Corporation, Beijing, CN;
Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation, Beijing, CN;
Liqiu Chu, Beijing, CN;
Fengqian Zhang, Beijing, CN;
Yihui Xu, Beijing, CN;
Dali Gao, Beijing, CN;
Shijun Zhang, Beijing, CN;
Jinliang Qiao, Beijing, CN;
Dehui Kong, Beijing, CN;
Baige Chou, Beijing, CN;
Lidong Xia, Beijing, CN;
Yiqing Bai, Beijing, CN;
Kai Xu, Beijing, CN;
Yueming Ren, Beijing, CN;
Yachao Zhao, Beijing, CN;
Abstract
A composite material includes a plurality of polypropylene sheet layer unit groups that are sequentially stacked; each polypropylene sheet layer unit group comprises at least one of the same or different polypropylene sheet layer units, the structure of each polypropylene sheet layer unit is BAB'; the structure of the polypropylene composite material is . . . i-th group, . . . second group, first group, second group, . . . i-th group, . . . ; the melting point of polypropylene composition Ais greater than the melting point of polypropylene compositions Band B′; and the average value of the melting points of all outer layers in the i-th group is greater than the average value of the melting points of all outer layers in an (i−1)th group. The polypropylene composite material has a very good tensile property and very good impact resistance, and also has good interlayer stripping strength at a relatively low hot-pressing temperature.