| abstract |
The subject of the present invention is to provide a sheet having low water absorption and linear thermal expansion coefficient, excellent transparency, and excellent dimensional stability under high humidity. The sheet of the present invention is a sheet prepared by blending fine fibrous cellulose with a fiber width of 1,000 nm or less, a resin derived from at least one selected from water-based resin emulsions and water-based resin dispersions, and a wet paper strength enhancer. The blending amount of the fine fibrous cellulose in the solid content of the sheet is 50% by mass or less, and the water absorption rate represented by the following formula (1) of the sheet is 50% or less, and is linear from 100°C to 150°C The coefficient of thermal expansion is 60 ppm/K or less, and the haze is 10% or less.nWater absorption=(W-Wd)/Wd×100 (1)n(Here, W represents the mass after immersing the sheet in ion-exchanged water for 24 hours, and Wd represents the mass after humidity conditioning for 24 hours at 23° C. and a relative humidity of 50%). |