Solution Of Aromatic Polyamide For Producing Display Element, Optical Element, Illumination Element Or Sensor Element

Abstract

The present disclosure, in one aspect, relates to a polyamide solution which can suppress the yellowness. The present disclosure, in one or a plurality of embodiments, relates to a polyamide solution comprising an aromatic polyamide and a solvent, the aromatic polyamide comprising a constitutional unit having one or more free carboxyl groups and having an aromatic ring structure and an alicyclic structure in the main chain. Further, the present disclosure, in one aspect, relates to a laminated composite material, comprising a glass plate and a polyamide resin layer; the polyamide resin layer laminated onto one surface of the glass plate, the polyamide resin layer having yellowness (JIS K7373) of 2.4 or less; and the polyamide resin layer obtained by applying the solution onto the glass plate.

Description

technical field [0001] In one aspect, the present invention relates to an aromatic polyamide solution. In another aspect, the present invention relates to a laminated composite material including a glass plate, a polyamide resin layer, and a polyamide resin layer laminated on one surface of the glass plate. In another aspect, the present invention relates to a method for producing a display element, an optical element, an illumination element, or a sensor element, which includes the step of forming a polyamide film using the above-mentioned polyamide solution. Background technique [0002] Transparency is required for a device for a display, and therefore, a glass substrate using a glass plate is used as the substrate (JP10311987(A)). Devices for displays using glass substrates are sometimes pointed out as problems such as heavy weight, breakage, and lack of bending. Therefore, an attempt to use a transparent resin film instead of the glass substrate has been proposed. ...

AI Technical Summary

Problems solved by technology

[0003] Highly transparent polycarbonates and the like are known as transparent resins for optical applications. However, heat resistance and mechanical strength are problematic when used in the manufacture of display elements.

On the other hand, polyimides can be cited as heat-resistant resins. However, general polyimides are colored dark brown, so there is a problem in optical applications. In addition, as transparent polyimides , a polyimide having a ring structure is known, however, it has a problem of lowering heat resistance

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