Method for preparing liquid crystal cylindrical lens grating film in roll-to-roll mode

Method for preparing liquid crystal cylindrical lens grating film in roll-to-roll mode

  • CN 105,652,485 B
  • Filed: 04/13/2016
  • Issued: 05/26/2020
  • Est. Priority Date: 04/13/2016
  • Status: Active Grant
First Claim
Patent Images

1. The method for preparing the liquid crystal lenticular lens grating film in a roll-to-roll manner is characterized in that a preparation device adopted by the method comprises a base material feeding roll (101), a liquid coating roll (102), a liquid homogenizing wheel (103), a PI liquid dropping machine (104), an infrared tunnel furnace, a friction roller (110), a left side roller (111), a right side roller (118), a liquid dropping crystal machine (112), a female die roller (114), a UV curing machine and a liquid crystal lenticular lens grating material collecting roll (120);

  • the liquid coating roller (102) is tangent to the base material feeding winding roller (101) from the right upper side, the liquid equalizing wheel (103) is tangent to the liquid coating roller (102) from the left upper side, every two adjacent rollers are tangent, and the rotation directions are opposite;

    the concave mould roller (114) is formed by attaching the outer circle surface layer of the mirror surface metal roller to the concave mould (113);

    the infrared tunnel furnace is provided with an infrared heating tube (105) and a conveying roller (107), a row of infrared heating tubes (105) are arranged above the conveying roller (107), the conveying roller (107) is used for conveying the concave grating coiled material transferred with the PI liquid, and the infrared heating tubes (105) are used for baking and curing the coiled material;

    the friction roller (110) is tangent to the left roller (111) from the right upper side, and a gap left between the friction roller and the left roller is fluff press-in amount h;

    the left side roller (111) and the right side roller (118) are symmetrically arranged on two sides of the female die roller (114), and adjacent rollers are tangent in pairs and have opposite rotation directions;

    the method comprises the following steps;

    firstly, a concave grating coiled material is conveyed to a base material feeding winding roll (101), a PI liquid dropping machine (104) drops PI liquid on the surface of a liquid coating roll (102), and the PI liquid on the surface of the liquid coating roll (102) is leveled uniformly by a liquid homogenizing wheel (103) and then is transferred to the concave grating coiled material to form a base material;

    secondly, baking and curing the base material transferred with the PI liquid through an infrared tunnel furnace, and performing 90-degree directional friction on the completely cured PI layer through a friction roller (110);

    rotating the base material which is rubbed at a fixed angle to a position tangent to a female die roller (114) through a left side roller (111), carrying out liquid crystal titration on the surface of the base material through a liquid crystal dropping machine (112), manufacturing a molded liquid crystal lenticular lens grating by tangency of the base material on which liquid crystal is dropped and the left side roller (111) through the female die roller (114), and carrying out constant temperature alignment in the rotating process of the female die roller (114);

    and step four, the liquid crystal cylindrical grating film which is well aligned at the constant temperature is wound through a liquid crystal cylindrical lens grating winding material roller (120) after being peeled off by UV curing.

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