LARGE-AREA ULTRA-HIGH MOLECULAR WEIGHT POLYETHYLENE ULTRA-THIN FILM AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2022/247505

A1

The present invention relates to a large-area ultra-thin ultra-high molecular weight polyethylene film and a preparation method therefor and belongs to the field of macromolecule processing. Provided is a method for preparing a large-area ultra-high molecular weight polyethylene ultra-thin film, the method comprising the following steps: 1) stirring and melt-blending ultra-high molecular weight polyethylene, a solvent and an antioxidant to form a homogeneous suspension; 2) extruding or banburying the suspension, and then carrying out compression molding to obtain a gel film; and 3) subjecting the obtained gel film to stretching, annealing, extraction and drying treatments to obtain a large-area ultra-high molecular weight polyethylene film. Provided in the present invention is a method for preparing a large-area ultra-thin ultra-high molecular weight polyethylene film, whereby a large-area ultra-thin ultra-high molecular weight polyethylene film with a thickness of 70-200 nanometers and an area greater than or equal to 0.6 square meters can be obtained, and the obtained film has a relatively high strength and stability.

LI RUNLAI (CN)
FU QIANG (CN)
SUN WEILONG (CN)
YANG KAILIN (CN)
TIAN KE (CN)
DONG PENG (CN)

PCT/CN2022/086512

December 01, 2022

April 13, 2022

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UNIV SICHUAN (CN)

B29C69/00; B29C55/14; B29C55/16; B29C71/02

CN113263747A	2021-08-17
JP2016121354A	2016-07-07
CN101151308A	2008-03-26
US20100151310A1	2010-06-17
US20100316902A1	2010-12-16
CN109834961A	2019-06-04
CN109997247A	2019-07-09

CHENGDU, DIANJING IP AGENCY (CN)

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