Package making – Methods – With contents treating
Patent
1995-04-03
1996-11-26
Crane, Daniel C.
Package making
Methods
With contents treating
53434, 53425, B65B 3102
Patent
active
055773680
ABSTRACT:
Wear resistance and oxidation resistance of bioimplantable polymeric parts is improved by packaging the parts within flexible, gas impermeable containers while subjecting the containers and the parts to a relatively high vacuum force. The containers are heat sealed while subjected to the vacuum force such that, upon sealing, hydrostatic pressure is exerted on the part. Following sealing of the packages, the packages and their contents are irradiated to an extent sufficient to sterilize the parts and to promote crosslinking within the part. Alternatively, the same property enhancements can be imparted to polymeric parts by packaging the part within rigid or flexible containers, minimizing the oxygen content within the containers, pressurizing the containers with an inert gas, or with a mixture of hydrogen and an inert gas, to greater than 1.5 atmospheres, and irradiating the part and the container.
REFERENCES:
patent: 4336618 (1982-06-01), Raab
patent: 4838877 (1989-06-01), Massau
patent: 5014494 (1991-05-01), George
patent: 5137688 (1992-08-01), DeRudder
patent: 5472415 (1995-12-01), King et al.
Flynn Timothy M.
Hamilton John V.
Manasas Mark A.
Crane Daniel C.
Geary III William C.
Johnson & Johnson Professional Inc.
Tolan Ed
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