Fibers comprising starch and biodegradable polymers

a biodegradable polymer and fiber technology, applied in the field of environmental degradation-friendly fibers comprising starch and biodegradable polymers, can solve the problems of less commercial success, compositions with excellent degradability only limited processability, compositions which are more easily processable, etc., and achieve the effect of high attenuation
US20050026529A1Inactive Publication Date: 2005-02-03BOND ERIC BRYAN +4
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
BOND ERIC BRYAN
Publication Date
2005-02-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

Environmentally degradable finely attenuated fibers produced by melt spinning a composition comprising destructurized starch, a biodegradable thermoplastic polymer, and a plasticizer are disclosed. The present invention is also directed to highly attenuated fibers containing thermoplastic polymer microfibrils which are formed within the starch matrix of the finely attenuated fiber. Nonwoven webs and disposable articles comprising the highly attenuated fibers are also disclosed.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is a divisional of Ser. No. 09 / 852,889, filed May 10, 2001.FIELD OF THE INVENTION

[0002] The present invention relates to environmentally degradable fibers comprising starch and biodegradable polymers, processes of making the fibers, and specific configurations of the fibers, including microfibrils. The fibers are used to make nonwoven webs and disposable articles. BACKGROUND OF THE INVENTION

[0003] There have been many attempts to make environmentally degradable articles. However, because of costs, the difficultly in processing, and end-use properties there has been little commercial success. Many compositions that have excellent degradability have only limited processability. Conversely, compositions which are more easily processable have reduced biodegradability, dispersability, and flushability.

[0004] Useful fibers with excellent environmental degradability for nonwoven articles are difficult to produce and pose add...

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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