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Patent Searching and Data


Title:
ALIGNMENT FILM FOR TRANSFERRING LIQUID CRYSTAL COMPOUND ALIGNMENT LAYER
Document Type and Number:
WIPO Patent Application WO/2020/085307
Kind Code:
A1
Abstract:
Provided is: a transfer film which can be used as a transfer film for transferring a liquid crystal compound alignment layer, and which comprises a drawn film made from polyester or the like that is inexpensive and has excellent mechanical strength, and which makes it possible to evaluate the state of alignment or the like of a liquid crystal compound alignment layer formed on the transfer film even while laminating the liquid crystal compound alignment layer on the transfer film; a transfer film which can transfer a liquid crystal compound alignment layer in a designed alignment while reducing the problem of deviation in the direction of alignment of the transferred liquid crystal compound alignment layer, and which can also prevent the occurrence of the problem of leakage of light from a display; or a transfer film which can effectively prevent the increase in haze of a film or the formation of foreign matters in the film in the step of forming the liquid crystal compound alignment layer on the film, and which enables the formation of a liquid crystal compound alignment layer having a designed alignment. An alignment film for transferring a liquid crystal compound alignment layer onto an object of interest, characterized in that the angle formed between the alignment direction of the alignment film and the running direction of the alignment film or a direction orthogonal to the running direction is up to 14 degrees as measured at 5 points, i.e., both end points each located on the 5-cm inside of each end of the film, a center point of the film, and midpoints each located midway between the center point and each of the both end points as observed in the width direction of the film. An alignment film for transferring a liquid crystal compound alignment layer onto an object of interest, characterized in that the difference between the thermal shrinkage ratio as measured at 150℃ for 30 minutes in the direction of the running of the alignment film and the thermal shrinkage ratio as measured at 150℃ for 30 minutes in a direction orthogonal to the direction of the running of the alignment film is 4% or less. An alignment polyester film for transferring a liquid crystal compound alignment layer onto an object of interest, characterized in that the amount of an ester cyclic trimer precipitated on the surface of a mold releasing face of the alignment polyester film after heating at 150℃ for 90 minutes is 1.0 mg/m2 or less.

Inventors:
SASAKI YASUSHI (JP)
MURATA KOUICHI (JP)
Application Number:
PCT/JP2019/041323
Publication Date:
April 30, 2020
Filing Date:
October 21, 2019
Export Citation:
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Assignee:
TOYO BOSEKI (JP)
International Classes:
B29C55/02; B32B7/023; B32B27/36; G02B5/30; B29L7/00; B29L11/00
Domestic Patent References:
WO2016010134A12016-01-21
Foreign References:
JP2006201746A2006-08-03
JP2013097277A2013-05-20
JP2017122864A2017-07-13
JP2008126461A2008-06-05
Attorney, Agent or Firm:
KAZAHAYA, Nobuaki et al. (JP)
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