Manufacturing method of optical laminated body
A technology of optical laminates and manufacturing methods, applied in optics, nonlinear optics, instruments, etc., can solve problems such as unevenness and bad points of polarizing films, and achieve the effect of improving unevenness and bad spots and inhibiting the precipitation of iodide
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Embodiment 1
[0108] As the resin substrate, an amorphous polyethylene terephthalate (A-PET) film (manufactured by Mitsubishi Chemical Corporation, Product name "NOVA CLEAR", thickness: 100 µm).
[0109] Corona treatment is performed on one side of the resin substrate (treatment conditions: 55W·min / m 2 ), at 60°C, 90 parts by weight of polyvinyl alcohol (polymerization degree 4200, saponification degree 99.2 mol%) and acetoacetyl modified PVA (polymerization degree 1200, acetoacetyl modification degree 4.6%, saponification degree 99.0 Mole % or more, manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "Gohsefimer Z200") 10 parts by weight of an aqueous solution was applied to the corona-treated surface and dried to form a PVA-based resin layer with a thickness of 10 μm to produce a laminate. The water contact angle of the resin substrate side surface of the obtained laminate was 60°.
[0110] The obtained laminate was uniaxially stretched (assisted in-air stretching) ...
Embodiment 2
[0119] An optical laminate was produced in the same manner as in Example 1, except that an air blowing device was used instead of a water absorption roll to remove the cleaning solution on the resin substrate side surface of the laminate, and it was wound up into a roll by a winder. The removal of the washing liquid is specifically performed as follows. That is, using a pair of rubber-made liquid removal rollers, the liquid removal of the laminate conveyed from the cleaning bath is performed, and then, the air is sprayed at an angle of about 45° with respect to the resin substrate side surface of the laminate, and the spray port An air blowing device (manufactured by Hitachi Industrial Equipment Systems Co., Ltd., product number "VB-060-E2") was arranged so that the distance from the surface was about 2 cm, and air was sprayed. The pressure of the air is 23kPa. In addition, the wind speed of the air was 30 m / min. It should be noted that the amount of water (amount of cleanin...
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