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Method of manufacturing resin film, polarizing plate made of resin film and liquid crystal display device made of polarizing plate

A manufacturing method and technology of resin film, which are applied in the directions of liquid crystal materials, chemical instruments and methods, synthetic resin layered products, etc., can solve the problems of non-uniform display, can not be used as a product, different degrees of polarization, etc., and achieve no waste of equipment. cost effect

Inactive Publication Date: 2005-12-07
KONICA MINOLTA OPTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If such a deformed film is used to manufacture a polarizing plate, the degree of polarization around the deformation is different from that of other parts, and a uniform degree of polarization cannot be obtained.
Therefore, if such a polarizing plate is used to manufacture a liquid crystal display device, it cannot display uniformly and cannot be used as a product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Stock solution formula 1

[0101] 100 parts by weight of cellulose triacetate

[0102] Dichloromethane 350 parts by weight

[0103] 12 parts by weight of ethanol

[0104] 12 parts by weight of triphenyl phosphate

[0105] チヌビン 326 (manufactured by Chiba Special Chemicals Co., Ltd.) 0.5 parts by weight

[0106] Silica microparticles 0.1 parts by weight

[0107] (Product name: AEROSIL-200V, manufactured by Japan Aerosil Corporation)

[0108] Put these into an airtight container, keep warm at 80°C under pressure, and stir to dissolve completely.

[0109] (Manufacture of film samples)

[0110] After filtering the solution of the above stock solution formulation 1, use a solution casting film-forming device (not shown in the figure), and cast it from a mold at a stock solution temperature of 33° C. onto a support made of stainless steel ring belt. After holding on the support for 60 seconds and drying to a peelable range, the roll material (dope film) was peeled off f...

Embodiment 2

[0113] (Manufacture of film samples)

[0114] A triacetate cellulose (TAC) film sample was produced in the same manner as in Example 1 using the solution of the stock solution formulation 1 described above. Here, the film width was 1385 mm, the final film thickness of the obtained cellulose triacetate film was 80 μm, the arbitrary transverse film thickness deviation was 0.9 μm, and the roughness value was 0.8.

[0115] And, the average value of the knurled height measurement, the minimum value of the knurled height measurement, and the maximum value of the knurled height measured at 10 points at intervals of at least 10 mm or more in any longitudinal direction of the obtained cellulose triacetate film were measured, and The knurling height measured value variation was calculated, and the obtained results are shown in Table 1 below.

Embodiment 3

[0117] Stock solution formula 2

[0118] 100 parts by weight of cellulose triacetate

[0119] 450 parts by weight of methyl acetate

[0120] Acetone 50 parts by weight

[0121] 1 part by weight of ethyl phthaloyl glycolate

[0122] Chibin 326 (manufactured by Chiba Special Chemicals Co., Ltd.) 0.5 parts by weight

[0123] Silica microparticles 0.1 parts by weight

[0124] (Product name: AEROSIL-200V, manufactured by Japan Aerosil Corporation)

[0125] Put these into an airtight container, keep warm at 80°C under pressure, and stir to dissolve completely.

[0126] (Manufacture of film samples)

[0127] After filtering the solution of the above stock solution formula 2, according to the same method as in Example 1, a triacetate cellulose (TAC) film sample with a final film thickness of 80 μm was manufactured, but the film width was specified to be 1360 mm. The obtained triacetate cellulose film is wound into a roll on the core, and the final film thickness is 80 μm, the a...

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Abstract

A method of manufacturing a resin film, including the steps of, a) slitting a resin base at both edge portions, the resin base comprising cellulose acetate or a norbornene type resin so as to form a resin base to a predetermined product width; and b) providing a knurling process on both edges of the slitted resin base, resulting in a final film thickness of 30 to 125 mum, a film thickness deviation in at random points across the width of 0.1 to 1.8 mum, and a creak value of 0.4 to 1.4, wherein a mean value of knurling knob height measured at 10 random points is 5 to 15 mum, a minimum value of measured knurling knob height is more than 1 mum, a maximum value of measured knurling knob height is less than 20 mum, and a deviation of the measured knurling knob height is 1 to 10 mum.

Description

technical field [0001] The present invention relates to, for example, a method for producing a cellulose ester or norbornene-based resin film suitable for use as a protective film for a polarizing plate in a liquid crystal display (LCD), a polarizing plate produced using the resin film, and a liquid crystal produced using the polarizing plate display device. Background technique [0002] In recent years, along with the use of liquid crystal display devices (LCDs) in various fields, high productivity (increased production volume) of polarizing plates, which are liquid crystal display elements used in LCDs, has been demanded. In addition, the thinning of liquid crystal display devices (LCDs) is being upgraded, so the thinning of polarizing plates used in LCDs is also urgently desired. [0003] However, at present, as protective films for LCD polarizers, triacetate cellulose (TAC) films are mainly used, but with the high productivity of polarizers, if the high productivity of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C41/24B29C41/52B29K1/00B29L7/00B32B27/00C09K19/00G02B1/10G02B5/30G02F1/1335
CPCG02B1/105C08J2301/12B32B27/00G02B5/3033C08J5/18C08J2365/00Y10T428/24355G02B1/14C09K2323/031G02F1/1333B29C41/28B32B2551/00B32B2307/42B32B2457/202B32B38/04B32B27/28
Inventor 清水和之
Owner KONICA MINOLTA OPTO
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