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Method for producing resin film

A manufacturing method and resin film technology, which can be applied to flat products, other household utensils, coatings, etc., and can solve problems such as film whitening

Active Publication Date: 2016-12-28
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, in the method of producing a resin film, if the film is stretched during production, the film may be whitened during stretching.

Method used

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  • Method for producing resin film
  • Method for producing resin film
  • Method for producing resin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～11、 comparative example 1～3

[0113] (Preparation of glue)

[0114] First, 100 parts by mass of cellulose triacetate resin (the substitution degree of acetyl group: 2.88) was added as a transparent resin to a dissolving tank containing 418 parts by mass of methylene chloride and 23 parts by mass of ethanol, and then triphenyl phosphate was added. 8 parts by mass, 2 parts by mass of ethyl phthaloyl ethyl glycolate, 1 part by mass of Tinuvin 326 (manufactured by BASF Japan Co., Ltd.), and 0.1 part by mass of Aerosil 200V (manufactured by Japan Aerosil Co., Ltd.). Then, it heated up until the liquid temperature became 80 degreeC, and stirred for 3 hours. In this way, a resin solution is obtained. Then, stirring was terminated, and it was left to stand until the liquid temperature became 43°C. Then, the resin solution after standing was filtered using filter paper with a filtration accuracy of 0.005 mm. Air bubbles in the resin solution were defoamed by leaving the filtered resin solution overnight. Using ...

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PUM

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Abstract

The invention provides a method for producing a resin film, the method having a step of supplying a long strip-like film and a step of stretching the film while conveying the film using a plurality of gripping members holding both ends of the film in the width direction. The thickness d of a gripping region, held by the gripping members, of the film is 0.012 to 0.045 mm, and the film is held by the gripping member in such a manner that the distance L between the front end of the film in the width direction and the furthest position from the portion, held by the gripping members, of the film to the front end satisfies the following formula (1). 2.5 mm< / =L< / = (1200*d-10.5)mm (1).

Description

technical field [0001] The present invention relates to a method for producing 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, electrical properties, and the like. Specifically, various resin films are arranged in the image display region of the liquid crystal display device as optical films such as a transparent protective film for protecting the polarizing element of the polarizer. As such a resin film, the resin film excellent in transparency, such as a cellulose ester film, is 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 resins, 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 specifica...

Claims

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Application Information

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IPC IPC(8): B29C41/28B29C41/44B29C55/08B29C37/00B29K1/00B29L7/00
CPCB29C37/0092B29C41/28B29C41/44B29C55/085B29K2001/08B29L2007/00C08J5/18C08L1/26B29C55/005B29C55/04B29C55/045
Inventor 久保公孝
Owner KONICA MINOLTA INC
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