Title:
HEAT SHRINK FILM AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/026993
Kind Code:
A1
Abstract:
The present application discloses a heat shrink film and a preparation method therefor, wherein the preparation method comprises the following steps: adding raw materials of an outer layer, a middle layer, and an inner layer, and performing melt co-extrusion so as to obtain a composite material; performing first inflation on the composite material, cooling and shaping a film bubble obtained by means of the first inflation, and then drawing same to form a tube film; introducing the tube film into a beam output window, and cross-linking linear molecular chains of the tube film by means of electron irradiation; and performing second inflation on the heated and cross-linked tube film, performing biaxial stretching, then performing cooling and shaping, and performing edge cutting so as to form a heat shrink film.
Inventors:
WANG DANXU (CN)
SU YANG (CN)
CHEN JIEXIN (CN)
ZHANG CHUNSHENG (CN)
SU YANG (CN)
CHEN JIEXIN (CN)
ZHANG CHUNSHENG (CN)
Application Number:
PCT/CN2019/104972
Publication Date:
February 18, 2021
Filing Date:
September 09, 2019
Export Citation:
Assignee:
GUANGDONG ANDELI NEW MAT CO LTD (CN)
International Classes:
B29C69/02; B29C48/10; B29C48/21; B32B27/32; C08L67/04; B29L9/00
Foreign References:
| CN108608707A | 2018-10-02 | |||
| CN102924890A | 2013-02-13 | |||
| CN108608702A | 2018-10-02 | |||
| CN102029755A | 2011-04-27 |
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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