Water stable fibers and articles comprising starch, and methods of making the same

a technology of thermoplastic starch and water stable fibers, which is applied in the direction of filament/thread forming, monocomponent polyester artificial filament, monocomponent polyamide artificial filament, etc., can solve the problems of starch fibers that are difficult to produce, small defects, and non-homogeneity in melt, and serious disruption of the stable supply of petroleum-based polymers used in making synthetic fibers
US20070082573A1Inactive Publication Date: 2007-04-12THE PROCTER & GAMBLE COMPANY
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
THE PROCTER & GAMBLE COMPANY
Publication Date
2007-04-12
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

Water stable fibers and articles made therefrom are formed from a thermoplastic composition comprising destructured starch, polyhydric alcohol, triglyceride, and optionally acid. Processes for making water stable compositions may comprise melt extruding a mixture of destructured starch, polyhydric alcohol, triglyceride, and optionally acid, to form an extrudate, and heating the mixture, extrudate, or both to provide a water stable article.
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Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application claims the benefit of U.S. Provisional Application No. 60 / 725,424, filed 11 Oct. 2005.FIELD OF THE INVENTION

[0002] The present invention relates to fibers made from thermoplastic starch compositions, and articles made therefrom. The fibers and articles are water stable, or may be rendered so. The invention also relates to methods of making the fibers and articles. BACKGROUND OF THE INVENTION

[0003] There have been many attempts to make starch-containing fibers, particularly on a high speed industrial level. However, starch fibers can be much more difficult to produce than films, blow-molded articles, and injection-molded articles containing starch because the material and processing characteristics for fibers are much more stringent. For example, local strain rates and shear rates can be much greater in fiber production than in other processes. Additionally, a homogeneous composition may be required for fiber spinning. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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