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AssigneeThe Procter & Gamble Company
InventorsLarry Neil MacKey, Gregory Charles Gordon, Lora Lee Buchanan, Stephen Wayne Heinzman, Paul Arlen Forshey
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Non-thermoplastic starch fibers having no melting point and having apparent peak wet tensile stress greater than about 0.2 MegaPascals (MPa). The fibers can be manufactured from a composition comprising a modified starch and a cross-linking agent. The composition can have a shear viscosity from about 1 Pascal•Seconds to about 80 Pascal•Seconds and an apparent extensional viscosity in the range of from about 150 Pascal•Seconds to about 13,000 Pascal•Seconds. The composition can comprise from about 50% to about 75% by weight of a modified starch; from about 0.1% to about 10% by weight of an aldehyde cross-linking agent; and from about 25% to about 50% by weight of water. Prior to cross-linking, the modified starch can have a weight average molecular weight greater than about 100,000 g/mol.
A non-thermoplastic starch fiber having an apparent peak wet tensile stress greater than about 0.2 MegaPascals (MPa), wherein the non-thermoplastic starch fiber as a whole has no melting point.
A non-thermoplastic starch composition comprising:
A fiber comprising from about 50% to about 99.5% by weight of modified starch, wherein the fiber as a whole does not exhibit a melting point.
A non-thermoplastic starch fiber having a salt-solution absorption capacity less than about 2 grams of salt solution per 1 gram of fiber, wherein the non-thermoplastic starch fiber as a whole has no melting point.
Dependencies are inferred from the claim text.