Nanofiber sheet and method for manufacturing the same
AssigneeRohm Co., Ltd.
InventorsHiroyuki Yano, Masaya Nogi
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Abstract
A nanofiber sheet that has a high degree of transparency, a high modulus of elasticity, a low coefficient of linear thermal expansion as well as high degrees of flatness and smoothness, in particular, a nanofiber sheet produced as a uniform and flat sheet having a high optical transmittance with cellulose as the only component. This sheet has the following characteristics: Calculated for a thickness of 60 μm, the transmittance for parallel rays of light having a wavelength of 600 nm is equal to or higher than 70%; The Young's modulus measured in accordance with the JIS K7161 method is equal to or greater than 10 GPa; The coefficient of linear thermal expansion measured in accordance with the ASTM D606 method is equal to or smaller than 10 ppm/K.
Claims14
A nanofiber sheet, comprising:
- a nonwoven fabric;
- the nonwoven fabric comprising a nanofiber and no resin material,
- wherein the nanofiber sheet has
- a transmittance for parallel rays of light having a wavelength of 600 nm is equal to or higher than 70% at a thickness of 60 μm,
- a Young's modulus measured in accordance with the JIS K7161 method is equal to or greater than 10 GPa and
- a coefficient of linear thermal expansion measured in accordance with the ASTM D606 method is equal to or smaller than 10 ppm/K, and wherein
- the nanofiber sheet is manufactured by a method comprising a surface-smoothing treatment performed by polishing, and
- wherein the nanofiber sheet contains no resin material.
Dependencies are inferred from the claim text.