Title:
DEVICE FOR PRODUCING INFLATION FILM
Document Type and Number:
WIPO Patent Application WO/2024/075632
Kind Code:
A1
Abstract:
A device (10) for producing an inflation film comprises: an extrusion means (1) which melts a thermoplastic resin and extrudes the melt through an annular die (2); a blowing means (2b) which supplies a gas to the inside of the extruded tubular melt to form a bubble; an air ring (7) which blows air against the bubble from outside; a take-off device (12) which takes off the bubble while folding the bubble into a sheet form; and a winding device (6) which winds up the folded film. The device (10) for producing an inflation film is equipped with a heating means (8) disposed on the peripheral side of a bubble formation region and extending from a position above the air ring to a position having a given height, and temperature control is conducted for at least two separate zones arranged in the height direction.
Inventors:
ARIMOTO KIKUO (JP)
TAKASAKI SHINICHI (JP)
TOGO KEITO (JP)
KITAJIMA KIYOTAKA (JP)
WAKAYA TOKUICHI (若谷 徳一)
TAKASAKI SHINICHI (JP)
TOGO KEITO (JP)
KITAJIMA KIYOTAKA (JP)
WAKAYA TOKUICHI (若谷 徳一)
Application Number:
PCT/JP2023/035424
Publication Date:
April 11, 2024
Filing Date:
September 28, 2023
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B29C48/10; B29C48/32; B29C48/885; B29C48/89; B29C48/92; B29L7/00
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
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