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Title:
HIGH-TEMPERATURE HIGH-LINEAR-PRESSURE MICRO-EUTECTIC METHOD FOR ENHANCING STRENGTH OF PTFE-BASED FILM
Document Type and Number:
WIPO Patent Application WO/2022/011960
Kind Code:
A1
Abstract:
Disclosed is a high-temperature high-linear-pressure micro-eutectic method for enhancing the strength of a PTFE-based film, relating to the technical field of polymer composite materials. The method comprises: pushing a PTFE-based nano-functional composite film forward at a speed of 6-8 m/min in a high-temperature high-linear-pressure micro-eutectic cavity with a length of 1.5 m at 380°C, controlling the linear pressure of the surface of the PTFE film to be 50-80 N/m, and under the coiling traction of a film coiling roller outside the cavity, enabling the molecular chains of the film to shrink and generate a eutectic, wherein multiple micro-eutectic molecular structures are arranged in parallel with each other. The film has a density of 2.1 kg/m3, and has nanoscale macromolecular aggregates and an ultra-micro-structure morphology with nanoscale and micronscale size concave and convex geometries of an average surface size of 10-20 um, a height of 5-10 um, and a spacing of 10-20 um. The bonding and peeling strength is improved, and the method can be used for preventing the icing up of various types of fan blades.

Inventors:
LIU JIANPING (CN)
XIANG XIN (CN)
WU JIANHUA (CN)
ZHU YAWEI (CN)
LI YAJING (CN)
FANG LIANG (CN)
ZHAO JINGXIN (CN)
WU HONG (CN)
WU JIANPING (CN)
MIN HONGWEI (CN)
Application Number:
PCT/CN2020/136605
Publication Date:
January 20, 2022
Filing Date:
December 15, 2020
Export Citation:
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Assignee:
CHINA THREE GORGES CORP (CN)
CHINA THREE GORGES RENEWABLES GROUP CO LTD (CN)
NANJING HAOHUI HI TECH CO LTD (CN)
International Classes:
B29C71/00; B29K27/18; B29L7/00
Foreign References:
CN101279524A2008-10-08
CN106313811A2017-01-11
CN110469464A2019-11-19
CN107774142A2018-03-09
US20090072428A12009-03-19
Attorney, Agent or Firm:
YICHANG THREE GORGES PATENT (CN)
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