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:
Aug. 27, 2024
Filed:
Sep. 18, 2021
Electric Power Research Institute. China Southern Power Grid, Guangdong, CN;
Yifan Zhang, Guangdong, CN;
Mingli Fu, Guangdong, CN;
Shuai Hou, Guangdong, CN;
Xiaolin Li, Guangdong, CN;
Lei Jia, Guangdong, CN;
Baojun Hui, Guangdong, CN;
Bin Feng, Guangdong, CN;
Wenbo Zhu, Guangdong, CN;
Yunpeng Zhan, Guangdong, CN;
Yongjie Nie, Guangdong, CN;
ELECTRIC POWER RESEARCH INSTITUTE. CHINA SOUTHERN POWER GRID, Guangdong, CN;
Abstract
The present invention provides a polypropylene cable protective layer and a preparation method thereof. The polypropylene cable protective layer sequentially includes a dielectric layer, a buffer layer and an insulating layer from the inside to the outside, and the thickness of the dielectric layer accounts for 5%˜12% of the thickness of the polypropylene cable protective layer; the thickness of the buffer layer accounts for 17%˜25% of the thickness of the polypropylene cable protective layer; the dielectric layer, the buffer layer and the insulating layer are respectively obtained by the wrapping of a polypropylene film A, a polypropylene film B and a polypropylene film C. The polypropylene cable protective layer of the present invention forms a dielectric gradient, and realizes the improvement of the insulation strength and voltage level of the power cable, and the increase of the transmission capability.