Patent ID: 8992731
Filing Date: 2015-03-31
Classification: B82Y,C08B,C08J,C08L,D06M,D21H,Y10T

Abstract:
1. A sheet of modified cellulose fibers which comprises cellulose fibers having an average fiber diameter of 100 nm or less and having a cellulose I type crystal structure in which 10% to 60% by mole of all hydroxyl groups of the cellulose have been modified with an aromatic-ring-containing substituent, wherein the sheet of modified cellulose fibers have a haze value measured with illuminant C of 3 or less wherein said haze value is measured after making a composite material by: immersing the cellulose fiber sheet having a thickness regulated so that the sheet has a basis weight of 40 g/m wherein the aromatic ring of each aromatic-ring-containing substituent is bonded to the cellulose by a connecting group selected from the group consisting of an ester group, an ether group and a carbamate group; the aromatic-ring-containing substituent is a substituent derived from an aromatic hydrocarbon compound, a heterocyclic aromatic compound, or a non-benzenoid aromatic compound; the aromatic-ring-containing substituent each may be configured of two or more moieties of any of the aromatic hydrocarbon compound, the heterocyclic aromatic compound, and the non-benzenoid aromatic compound, the moieties having been connected to each other with a single bond or an alkyl group having 1-3 carbon atoms; and the aromatic-ring-containing substituent may be one in which hydrogen atom thereof has been replaced with an alkyl group having 1-12 carbon atoms.