A kind of cellulose triacetate film

A technology of cellulose triacetate and ester film, which is applied to other household appliances, coatings, flat products, etc., and can solve the problems of high crystal points of triacetate cellulose film, long grinding time of matting agent, and shortened service life of filter elements, etc. problems, to achieve the effect of reducing the ills of the crystal point, reducing the stirring frequency and prolonging the life of the filter element
CN106696154BActive Publication Date: 2019-01-25CHINA LUCKY FILM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA LUCKY FILM CORP
Publication Date
2019-01-25

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Abstract

The invention relates to a cellulose triacetate film. Preparation steps comprise preparation of a cellulose triacetate celloidin liquid, dispersion and addition of a matting agent and tape casting, wherein in the dispersion and addition link of the matting agent, the matting agent is mixed and dispersed through ultrasonic cavitation and mechanical stirring, the dispersing time and the grinding time of the matting agent are effectively shortened by means of a method of controlling a flow rate of a pipeline, an agglomeration phenomenon in the matting agent adding process is avoided, and in the dispersion liquid adding process, the content of particles, less than 10 [mu]m, of the matting agent is stabilized to 99.5% above, so that the service life of a filter element is effectively prolonged, and the cost is lowered. Compared with the prior art, the cellulose triacetate film prepared by the invention has the advantages of being low in haze, high in light transmittance, few in crystal points, few in moisture absorption points and the like.
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Description

technical field

[0001] The invention relates to a cellulose triacetate film, in particular to a cellulose triacetate film which is mixed with ultrasonic cavitation and mechanical stirring to disperse a matting agent, and prevents the agglomeration of the matting agent by controlling the pipeline flow velocity. Background technique

[0002] In recent years, cellulose triacetate films have been widely used as supports and protective films for polarizers due to their excellent optical and physical properties in various display devices of liquid crystal displays that have become increasingly popular.

[0003] Cellulose triacetate films are usually produced by solution casting. It is to dissolve cellulose triacetate in a solvent to form a polymer solution (hereinafter referred to as cotton glue). After filtering, use a casting mold to discharge the cotton glue onto the casting support. When the casting film on the support has the After supporting, peel the casting film from the ...

Claims

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