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Casting device and film forming method from solution

A casting film and casting technology, applied in lamination devices, chemical instruments and methods, lamination, etc., can solve problems such as uneven thickness, achieve excellent surface conditions, and prevent uneven thickness

Inactive Publication Date: 2015-05-06
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is uneven thickness

Method used

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  • Casting device and film forming method from solution
  • Casting device and film forming method from solution
  • Casting device and film forming method from solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0175] Next, in order to confirm the presence or absence of the effects of the present invention, experiments 1 to 4 were performed. A detailed description will be given in Experiment 1. For Experiments 2 to 4, the description of the same conditions as in Experiment 1 will be omitted, and only the different parts will be explained.

[0176] (Preparation of cellulose acylate)

[0177] Cellulose acylates with different types and substitution degrees of acyl groups described in Table 1 were prepared. In this, sulfuric acid (7.8 parts by mass relative to 100 parts by mass of cellulose) was added as a catalyst, and carboxylic acid as a raw material of the acyl substituent was added, and the acylation reaction was carried out at 40°C. At this time, the type and degree of substitution of the acyl group are adjusted by adjusting the type and amount of carboxylic acid. In addition, the acylation reaction was followed by maturation at 40°C. Furthermore, after the aging, it was washed with...

Embodiment 2

[0231] In Experiments 1 to 4 of Example 1, except that the additive A contained in the first to third dope was replaced by the compound of A-3 described in Table 2 with the compound of A-10 described in Table 2. Except for the compound, the production of the laminated film 55 was carried out in the same manner as in Experiments 1 to 4 of Example 1. The evaluation result of the obtained laminated film 55 showed the same tendency as Experiments 1-4.

Embodiment 3

[0233] In Experiments 1 to 4 of Example 1, except that the additive A contained in the first dope to the third dope was replaced by the compound of A-3 in Table 2 with A-24 in Table 2. Except for the compound, the production of the laminated film 55 was carried out in the same manner as in Experiments 1 to 4 of Example 1. The evaluation result of the obtained laminated film 55 showed the same tendency as Experiments 1-4.

[0234] From the foregoing, it is understood that according to the present invention, it is possible to produce a laminated film having a good surface condition while suppressing unevenness in thickness.

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Abstract

The invention provides a casting device and a film forming method from a solution. The main body of a feed block is equipped with a flow path.The middle and upper reaches of the flow path are equipped with fins and the upstream part of the flow path is divided into flow paths by the fins.the part of the flow path closer to the downstream than the fins is successively equipped with a confluence section and a laminated rubber cement flow path from the upstream side to the downstream side.A first rubber cement, a second rubber cement and a third rubber cement flow through the flow path.The first rubber cement, the second rubber cement and the third rubber cement flow together by the fins in the confluence section.The laminated rubber cement is obtained from the respective formed layer of the first rubber cement, the second rubber cement and the third rubber cement by the confluence thereof.The laminated rubber cement flows through the laminated rubber cement flow path.The downstream of the fins is equipped with a low friction layer.

Description

Technical field [0001] The present invention relates to a casting device for forming a laminated cast film having a layer structure, and a solution film forming method using the same to produce an optical film having a laminated structure. In particular, it relates to a casting device for forming a laminated cast film in which polymers contained in each layer are different from each other, and a solution film forming method for producing an optical film having a laminated structure in which polymers contained in each layer are different from each other. Background technique [0002] A polymer film (hereinafter referred to as a film) has advantages such as excellent light transmittance and flexibility, and can be made into a lightweight film. Therefore, it is used in various ways as an optical film. Among them, cellulose ester-based films using cellulose acylate or the like are used for optical films. As an optical film, a photographic photosensitive film is representative, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L1/10B32B37/00
Inventor 中村直贵武田淳
Owner FUJIFILM CORP
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