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Solution film-making method and solution film-making apparatus

A solution film-making and equipment technology, which is applied in the field of solution film-making equipment, can solve the problems of uneven mixing and uneven mixing of two glues, and achieve the goal of suppressing residual defects of peeling, satisfying reuse, and suppressing uneven optical properties Effect

Inactive Publication Date: 2013-07-10
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the problem of uneven mixing of the two glues sometimes occurs
Therefore, in order to avoid uneven mixing, it has been difficult to set a wide range of the mixing ratio of the dope and the base polymer.

Method used

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  • Solution film-making method and solution film-making apparatus
  • Solution film-making method and solution film-making apparatus
  • Solution film-making method and solution film-making apparatus

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Embodiment

[0148] Experiments 1 to 4 were performed in order to confirm the presence or absence of the effects of the present invention. Experiment 1 will be described in detail, and for Experiments 2 to 4, the description of the same conditions as those of Experiment 1 will be omitted, and only the different parts will be described.

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Abstract

The invention provides a solution film-making method and solution film-making apparatus, wherein a main solvent and an auxiliary solvent are respectively used to prepare a first mixed solvent and a second mixed solvent in the concentrated mucilage preparing unit and a chip mucilage preparing unit. In a mixing part, a raw polymer and a first mixed solvent I sued to prepare raw material mucilage. In a dissolving part, part of the first mixed solvent is evaporated from the raw material mucilage to prepare the concentrated mucilage. In the chip mucilage preparing unit, a second mixed solvent and chips are used to prepare the chip mucilage. A three-way valve takes one mucilage of the concentrated mucilage and chip mucilage as the casting mucilage to convey to the film-making unit. In the film-making unit, the solution film-making method is performed, and a film is made by using the casting mucilage.

Description

technical field [0001] The present invention relates to a solution membrane-forming method and solution membrane-forming equipment for producing a membrane using a dope prepared from crushed polymer formers and a solvent. Background technique [0002] Polymer films (hereinafter referred to as films) have excellent light transmittance and flexibility, and have advantages such as enabling weight reduction and thinning, so they can be used in various fields as optical functional films. Among them, cellulose ester-based films using cellulose acylate or the like are strong and have a low birefringence, so they are currently used in photographic photosensitive films and components of liquid crystal display devices such as protective films for polarizers or Optical functional films such as optical compensation films. [0003] As the main production methods of films, there are melt extrusion method and solution film forming method. The melt extrusion method is a method of extrudin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L1/08
Inventor 堀川孝俊
Owner FUJIFILM CORP