Patent ID: 8372193

Claim:
A cellulose-based fiber having a breaking elongation no less than about 28%, wherein the cellulose-based fiber is prepared from a cellulose-based masterbatch comprising: about 77 wt % to about 95 wt % of a esterified cellulose; about 4.5 wt % to about 15 wt % of a polyethylene glycol; about 0.01 wt % to about 3 wt % of a bifunctional reactant; about 0.01 wt % to about 0.15 wt % of an initiator; and about 0.01 wt % to about 5 wt % of a dispersing agent, wherein each of the bifunctional reactant has two terminal reactive end-groups, and at least part of the bifunctional reactant has its two reactive end-groups respectively connected to the molecular chain of two esterified cellulose molecules such that the esterified cellulose molecules form a matrix with a continuous phase and the polyethylene glycol molecules distribute across the matrix.