Polypropylene cable protective layer and preparation method thereof

US12073961B2 · kind B2 · utility

Assignee

• ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID · CN

Inventors

• Yifan Zhang · Woodbury, US
• Mingli FU · Longbeilingcun, CN
• Shuai Hou · Beijing, CN
• Xiaolin Li · San Diego, US
• Lei Jia · Beijing, CN
• Baojun HUI · Longbeilingcun, CN
• Bin Feng · Beijing, CN
• Wenbo ZHU · Longbeilingcun, CN
• Yunpeng ZHAN · Longbeilingcun, CN
• Yongjie Nie · Longbeilingcun, CN

Key dates

• Filing date: Sep 18, 2021
• Grant date: Aug 27, 2024
• Expiry date: Sep 18, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01B7/17
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

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.