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Manufacturing method of resin film

A manufacturing method and resin film technology, applied in the field of resin film manufacturing, can solve problems such as film damage

Active Publication Date: 2020-06-23
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, when the resin film is produced, the film peeled from the support may be damaged.
For example, when a film peeled from a support is transported by a transport roller, the film may slip on the transport roller and cause damage to the film.

Method used

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  • Manufacturing method of resin film
  • Manufacturing method of resin film
  • Manufacturing method of resin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3、 comparative example 1、2

[0125] (preparation of mucilage)

[0126] First, 100 parts by mass of cellulose triacetate resin (the degree of substitution of the acetyl group is 2.88) was added as a transparent resin to a dissolution tank containing 418 parts by mass of methylene chloride and 23 parts by mass of ethanol, and phosphoric acid was further added. 8 parts by mass of triphenyl ester, 2 parts by mass of ethyl phthalate (methyl) glycolate, 1 part by mass of Tinuvin326 (manufactured by BASF Japan Co., Ltd.), and 0.1 part by mass of AEROSIL 200V (manufactured by Japan Aerosil Co., Ltd.). Then, after heating up to a liquid temperature of 80° C., it was stirred for 3 hours. Thus, a resin solution was obtained. Then, stirring was terminated, and it was left to stand until the temperature of the liquid became 43°C. And, the resin solution left to stand was filtered using the filter paper of 0.005 mm of filtration accuracy. Air bubbles in the resin solution were defoamed by leaving the filtered resin ...

Embodiment 4

[0150] Such as image 3 As shown, it carried out similarly to Example 1 except having blown obliquely toward the both ends of a film from the width direction outer side of a film so that the angle (theta)1, (theta)2 of wind with respect to a film surface may be 50 degrees.

[0151] The scratch evaluation of the obtained resin film was "⊚".

Embodiment 5

[0153] Such as Figure 4 As shown, the air was blown obliquely from the downstream side to the upstream side in the conveyance direction of the film so that the angle θ3 of the wind with respect to the film surface was 30°, and it was carried out in the same manner as in Example 1 except that.

[0154] The scratch evaluation of the obtained resin film was "⊚".

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Abstract

One aspect of the present invention is a method for manufacturing a resin film, which includes: a forming step of forming a long film; a conveying step of conveying the film by contacting it with a conveying roller; The spraying process of injecting the wind in such a manner that the surface of the contact side of the conveyor roller is blown by the wind, and the position blown by the wind is from the distance in the length direction of the film from the contact between the film and the conveyor roller. The position is within 45cm, the temperature of the wind is at least 10°C lower and less than 10°C higher than the ambient temperature near the position where the wind blows, and the speed of the wind is 2 to 20m / sec.

Description

technical field [0001] The present invention relates to a method for manufacturing a resin film. Background technique [0002] Resin films are used in various fields such as liquid crystal display devices in view of their chemical properties, mechanical properties, and electrical properties. Specifically, in the image display region of the liquid crystal display device, various resin films are disposed as optical films such as a transparent protective film for protecting the polarizing element of the polarizing plate. As such a resin film, resin films excellent in transparency, such as a cellulose ester film, are widely used, for example. [0003] Resin films, such as a cellulose ester film, can be manufactured using the resin solution (dope) which melt|dissolved raw material resin, such as a cellulose ester resin, in a solvent, for example. As a manufacturing method of the resin film using such a dope, a solution casting film-forming method etc. are mentioned specifically...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L1/12C08K5/523C08K5/12
CPCC08J5/18C08J2301/12C08K5/12C08K5/523C08L2203/16C08L1/12B29C41/36B29C41/44B29C41/46B29D11/0074B29K2001/12
Inventor 久保公孝
Owner KONICA MINOLTA INC