Hydrophilic polyurethane foams for use in catamenial devices

Details Hydrophilic polyurethane foams for use in catamenial devices Hydrophilic polyurethane foams for use in catamenial devices

1975-05-07

1978-05-09

Pellegrino, Stephen C.

Surgery

Respiratory method or device

Ozone or ion generation

128270, A61F 1320

Patent

active

040881326

ABSTRACT:
A hydrophilic polyurethane foam for use in a catamenial device such as a tampon is disclosed which can be compressed to less than about 50 percent of its original dry volume, stored in such condition for an extended period of time, and later rapidly re-expanded to at least its dry volume. Prior to compression, the foam is impregnated with a solid inorganic release agent, which is located within the cells of the foam and maintains the separation of the cell walls. Adherence of contiguous cell walls is prevented and the rapid re-expansion of the foam upon contact with moisture or water is thereby facilitated.

REFERENCES:
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patent: 2386590 (1945-10-01), Calhoun
patent: 2690415 (1954-09-01), Shuler
patent: 2808832 (1957-10-01), Myers et al.
patent: 3306966 (1967-02-01), Matejcek et al.
patent: 3515138 (1970-06-01), Hochstrasser et al.
patent: 3595236 (1971-07-01), Corrigan et al.
patent: 3670731 (1972-06-01), Harmon
patent: 3690321 (1972-09-01), Hirschman
patent: 3765417 (1973-10-01), Crockford
patent: 3900030 (1975-08-01), Bashan

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