Patent ID: 11879058
Assignee: NEOLOGY, INC.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC C  D | IPC C

Claim 24:
25. A method for producing yarn fibers from a composition that includes a starch-based polymeric material, the method comprising:
providing a composition that includes a starch-based polymeric material, wherein the starch-based polymeric material is a high molecular weight starch-based polymeric material having an average molecular weight of at least 3 million g/mol, and wherein the starch-based material has a crystallinity of less than about 20%, and resists recrystallization, and has a water content no greater than 2% by weight;
spinning the composition to produce yarn fibers having an as spun diameter from about 40 μm to about 150 μm, the yarn fibers including the starch-based polymeric material, wherein the composition exhibits a shear viscosity of greater than 50 Pa·s and no more than about 600 Pa·s at 190° C. at a process shear rate of 200 s−1, and avoids onset of melt flow instability during spinning of the yarn fibers; and
drawing the as spun yarn fibers from their spun diameter down to a smaller diameter.