Controlling the dissolution of dissolvable polymer...

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber

Reexamination Certificate

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C428S397000, C428S374000

Reexamination Certificate

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06861142

ABSTRACT:
The dissolution of dissolvable components in plural component polymer fibers is achieved by providing a polymer fiber including at least two sections, where at least one fiber section includes a dissolvable component. The rate at which at least part of the fiber dissolves is controlled by at least one of a fiber section having a non-round cross-sectional geometry, and at least two fiber sections including two different dissolvable components. In an exemplary embodiment, island-in-the-sea fibers are formed with non-round and elongated cross-sectional geometries. In another embodiment, sheath-core fibers are formed in which the sheath and core include different dissolvable components.

REFERENCES:
patent: 3700545 (1972-10-01), Matsui et al.
patent: 3718534 (1973-02-01), Okamoto et al.
patent: 5162074 (1992-11-01), Hills
patent: 6551353 (2003-04-01), Baker et al.
patent: 10060731 (1998-03-01), None

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