Title:
METHOD FOR PRODUCING THERMOPLASTIC LIQUID CRYSTAL POLYMER FILM
Document Type and Number:
WIPO Patent Application WO/2024/075636
Kind Code:
A1
Abstract:
A method for producing a thermoplastic liquid crystal polymer film by an inflation filmmaking method that melt extrudes a liquid crystal polymer that exhibits optical anisotropy when molten from an annular die into a tube shape, forms a bubble by supplying a gas and expanding the interior space thereof while cooling this tube-shaped molten material, and takes off this bubble while folding into a sheet shape, wherein the bubble is taken off while heating in a state such that the ratio hf/ht of the height hf from the exit of the die to the frost line of the bubble and the height ht from the exit of the die to the upper end of the heating means is from 50% to 100% by heating the bubble by a heating means provided on the outer periphery of the bubble formation zone, and a thermoplastic liquid crystal polymer film having a molecular orientation SOR of 0.8 to 1.5 is produced.
Inventors:
ARIMOTO KIKUO (JP)
TAKASAKI SHINICHI (JP)
TOGO KEITO (JP)
TAKASAKI SHINICHI (JP)
TOGO KEITO (JP)
Application Number:
PCT/JP2023/035441
Publication Date:
April 11, 2024
Filing Date:
September 28, 2023
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B29C48/08; B29C48/21; B29C48/32; B29C48/885; B29C48/89; B29C48/92; B29K67/00; B29K77/00; B29L9/00
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
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