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Optical film, polaroid, and liquid crystal display apparatus

A technology of optical film and cellulose acylate, applied in the field of optical film, can solve problems such as peeling, and achieve the effects of high durability, improved durability and good polarization performance

Inactive Publication Date: 2012-10-31
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, stability to light is a particularly important item, but, for the existing functional layer, there is a problem that the active energy ray-cured layer is easily peeled off from the cellulose acylate film if it is irradiated with light for a long time, and improvement is required.

Method used

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  • Optical film, polaroid, and liquid crystal display apparatus
  • Optical film, polaroid, and liquid crystal display apparatus
  • Optical film, polaroid, and liquid crystal display apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 101

[0287] (1) Film production of cellulose acylate film

[0288]

[0289] Cellulose acylate having an acetyl substitution degree of 2.87 was prepared. Here, sulfuric acid (7.8 parts by mass with respect to 100 parts by mass of cellulose) was added as a catalyst, carboxylic acid as a raw material of an acyl substituent was added, and an acylation reaction was performed at 40°C. In addition, after acylation, aging was performed at 40 degreeC. Then, the low molecular weight component of this cellulose acylate was washed and removed with acetone.

[0290]

[0291] (Preparation of solution 1 of cellulose acylate)

[0292] The following composition was put into the mixing box, and each component was melt|dissolved by stirring, and the cellulose acylate solution 1 was prepared.

[0293]

[0294]

[0295] In addition, the sucrose benzoate used as the above-mentioned plasticizer uses 15 mol% or less of benzoyl substitutions with a degree of substitution of 8, and a total of 7...

Embodiment 102～118

[0335] [Preparation of Optical Films (Polarizer Protective Films) of Examples 102 to 118 and Comparative Examples 201 to 203]

[0336] Except for changing the type and amount of plasticizer added to cellulose acylate in Example 101, the film thickness, the type and addition of hindered amine compound added to the active energy ray-cured layer as described in Table 8, Except the amount, the optical film (polarizer protective film) of Examples 102-118 and Comparative Examples 201-203 was manufactured similarly.

[0337] In addition, in following Table 8, the addition amount of a plasticizer shows the mass parts with respect to 100 mass parts of cellulose acylate resins. In addition, in the following Table 8, sucrose benzoate means that the substitution body with a degree of substitution of benzoyl group of 8 is 15 mol% or less, the total number of substitution bodies with a degree of substitution of 7 to 6 is 70 mol% or less, and the substitution degree The sucrose benzoate who...

Embodiment 301

[0362] [Production of liquid crystal display device]

[0363] Peel off the polarizing plate on the viewer side of a commercially available liquid crystal television (BRAVIA J5000 from SONY Corporation), and place the polarizing plate of the present invention using the polarizing plate protective film of Example 101 according to the polarizing plate protective film of Example 101. The form on the liquid crystal cell side is pasted via an adhesive. The transmission axis of the polarizing plate on the viewer side is arranged in the up-down direction. Moreover, the liquid crystal display device of the comparative example was produced similarly except having used the polarizer protective film of the comparative examples 201-203. Compared with the liquid crystal display devices using the polarizing plate protective films of the comparative examples, the liquid crystal display device of the present invention produced in this way has less deterioration in display performance even if ...

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Abstract

Provided is an optical film, which is capable of fully keeping close cooperation between the active energy radial solidifying layer and the acylation cellulose membrane even exposed to sunlight for a long while. Even as polaroid protective film assembled to Polaroid and used for a long time at a high temperature, the optical film can still keep excellent polarization performance. Moreover, the thickness of the optical film is reduced. In addition, the invention also provides a polaroid and a liquid crystal display apparatus employing the optical film. The optical film of the invention is provided with an acylation cellulose membrane and an active energy radial solidifying layer. The acylation cellulose membrane comprises at least one plasticizer selected from the group consisting of a carbohydrate ramification, polyol ester, and contracting polyester. Moreover, the active energy radial solidifying layer comprises hindered amine compound.

Description

technical field [0001] The present invention relates to an optical film, a polarizing plate and a liquid crystal display device using the above optical film. Background technique [0002] In recent years, liquid crystal display devices have been increased in size mainly for TV applications, and along with this, improvements in image quality and price reductions have been increasingly demanded. In addition, in the future, it is expected that the frequency of outdoor use will increase mainly for so-called mobile applications such as electronic signboards and mobile phones, smartphones, etc., and liquid crystal display devices that can withstand harsher environments than in the past are required. [0003] On the other hand, functions such as scratch resistance, antireflection, and antistatic are required to be imparted to the surface of the polarizing plate on the viewer side. As a method of imparting the above-mentioned functions, generally, a polarizing plate protective film...

Claims

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Application Information

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IPC IPC(8): G02B1/04G02B5/30G02F1/1335B32B27/18
Inventor 深川伸隆野吕正树
Owner FUJIFILM CORP
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