| abstract |
The present invention provides a molded article having a low linear expansion coefficient, a high light transmittance, and a suitable moisture permeability, in particular, a transparent substrate having a low linear expansion coefficient, a high light transmittance, and a suitable moisture permeability, while using a material that effectively uses a natural material. The transparent substrate contains at least an oxidized polysaccharide, the coefficient of linear expansion at 30 ° C. to 150 ° C. is 50 ppm / ° C. or less, and the light transmittance at 660 nm is 70% or more. In addition, the production method includes an oxidation step of oxidizing cellulose in water by using a 2,2,6,6-tetramethyl-1-piperidine-N-oxyl or a derivative thereof as a catalyst and acting a co-oxidant, and oxidation It comprises in this order a seam-isolating step of decomposing one cellulose in water to form cellulose fibers and a step of forming a base material using a cellulose dispersion liquid containing cellulose fibers in this order. |