| 摘要 |
<Problem>
The present invention provides a formed article which effectively utilizes a natural material and which has a low linear expansion coefficient, a high light transmittance and an appropriate level of moisture permeability. To be more specific, the present invention provides a transparent substrate which has a low linear expansion coefficient, a high light transmittance and an appropriate level of moisture permeability. <Solution>
The transparent substrate includes at least an oxidized polysaccharide and has a linear expansion coefficient of 50 ppm/°C or less at a temperature in the range of 30-150 °C and a light transmittance of 70 % or more at a wavelength of 660 nm. In addition, its manufacturing method includes an oxidizing process in which a cellulose reacts with 2, 2, 6, 6-tetramethyl-1-piperidine-N-oxyl or its derivatives as a catalyst to be oxidized in water under the presence of a co-oxidizing agent, along with a fiberizing process in which the oxidized cellulose is fiberized in water to form a cellulose fiber, and a substrate-forming process in which a transparent substrate is formed from a cellulose dispersion liquid containing the cellulose fiber. |
