Method of manufacturing a disposable contraceptive intravaginal

Details Method of manufacturing a disposable contraceptive intravaginal Method of manufacturing a disposable contraceptive intravaginal

1980-01-11

1982-01-19

Anderson, Philip

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

128127, 156245, 1563082, 264 455, 264 464, 264 466, 264321, B32B 518, B29D 2704, A61F 546

Patent

active

043115438

ABSTRACT:
Disposable contraceptive intravaginal cervical barriers of one, two, three, four, or five layers in the form of standard pessaries with at least one layer impervious to the passage of sperm, with a medicament such as spermicide, germicide, or an abortion inducing agent either impregnated into a foam plastic layer or in the form of a layer of gel or powder, said medicament being activatable upon contact with an aqueous solution.
Methods of producing disposable contraceptive barriers either as a wet foam plastic method wherein medicament is added to liquid foam and the resulting mixture is formed in a mold with any subsequent layers then added, or as a dry foam plastic method wherein layers including a layer of medicament in the form of a gel or a powder are superposed in sequence and formed in a die.

REFERENCES:
patent: 3039911 (1962-06-01), Fox
patent: 3144372 (1964-08-01), Peterson et al.
patent: 3170178 (1965-02-01), Scholl
patent: 3234065 (1966-02-01), Best
patent: 3244571 (1966-04-01), Weisman
patent: 3396062 (1968-08-01), Waite
patent: 3463745 (1969-08-01), Hofrichter et al.
Zwolinski, Leon M., "Molded Integral-Skin Urethane Foam," In SPE Journal, Sep. 1969, vol. 25, pp. 24-27.

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