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Grinding treatment method and device

A processing method and a technology of a processing device, which are applied in the field of fluff adjustment, can solve problems such as insufficient dust removal, non-uniform directionality of fluff, and non-uniform directionality of oriented films, etc.

Inactive Publication Date: 2009-12-16
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the methods described in Patent Documents 2 to 4, the dust removal of the polishing cloth is carried out in a non-contact state with the fluff of the polishing cloth, so the removal of dust is not sufficiently performed.
[0013] However, when the dust is removed by contact with the polishing cloth, the directionality of the fluff becomes non-uniform, and the directionality of the alignment film of the alignment layer becomes non-uniform.

Method used

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  • Grinding treatment method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] (Fabrication of a long flexible strip equipped with an alignment film forming material layer)

[0071]Long-chain alkyl-modified polyvinyl alcohol (MP-203, Kuraray (manufactured by Kuraray Co., Ltd.) 5% by weight aqueous solution was dried at 90° C. for 4 minutes. In this way, an alignment film forming material layer having a thickness of 2.0 μm was formed.

[0072] (Grinding treatment of alignment film forming material layer)

[0073] Used for long flexible films with an alignment film forming material layer figure 1 The device of the present invention implements grinding treatment on the surface of the alignment film forming material layer. The transparent film provided with the material layer for forming an alignment film was continuously conveyed in the direction of the arrow at 20 m / min. The transparent film is conveyed while being pressed from above by a roller (roller outer diameter: 90mm, length: 1650mm), and the grinding roller (outer diameter: 300mm) presse...

Embodiment 2～14

[0076] [Examples 2 to 14, Comparative Example 1]

[0077] In addition to changing the condition of the dust removal part and the condition of the grinding treatment device to Figure 6 Except for the conditions shown, the polishing treatment was performed in the same manner as in Example 1.

[0078] [test results]

[0079] The bright spot defects of the polished transparent films of Examples 1 to 6 and Comparative Example 1 were evaluated based on the frequency of bright spot occurrence using a planar inspection device using a CCD camera. The result is as Figure 6 shown. In addition, the symbols in the table are as follows.

[0080] ◎…high quality

[0081] ○...The quality is within the allowable range

[0082] △…Mass allowable limit

[0083] ×...The quality is outside the allowable range

[0084] The quality of the films of Comparative Examples 1 and 3 without a dust exhaust device and Comparative Example 2 without a dust removal device was not within the allowable ra...

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Abstract

The present invention provides a grinding treatment method and device for improving production ratio by removing dust in grinding treatment, making orientation of fluff of the grinding cloth accordant in link and realizing long service time. The grinding treatment is characterized by comprising: an orientation film forming process of moving strip flexible film with orientation film forming material layer in length direction, simultaneously contacting the grinding cloth bonded on the grinding roller with surface of the orientation film forming material layer to form the orientation film; a grinding cloth dust removing process of contacting the a dust removing member with surface of the cloth to remove dust on the cloth after the contact of the cloth and the strip flexible film; and a dust air-discharging process of removing the dust removed in the grinding cloth dust removing process with air.

Description

technical field [0001] The present invention relates to a polishing method and a polishing device, and more particularly to a method of removing dust generated during polishing of an alignment film in a manufacturing process of an optical compensation film and a method of adjusting fluff of a polishing cloth. Background technique [0002] As a method of improving the viewing angle of TN-LCDs widely used in liquid crystal display devices, there is known an optical compensation film in which a liquid crystalline discotic compound layer is formed on an alignment film of a transparent film. At this time, the alignment film is obtained by forming an alignment film forming material layer on a transparent film, and performing a grinding treatment on the alignment film forming material layer. [0003] The grinding process is performed by rotating the grinding roller with the grinding cloth (grinding sheet) attached to the peripheral surface of the grinding roller cylinder in the opp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B7/12B24B53/02B24B55/06B24B55/00B24B29/02B24B37/04B24B53/017
Inventor 村上大伊藤秀知
Owner FUJIFILM CORP
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