Stock material or miscellaneous articles – Sheet including cover or casing
Patent
1995-01-30
1996-06-18
Ahmad, Nasser
Stock material or miscellaneous articles
Sheet including cover or casing
215247, 215364, 428 76, 428409, 428492, 428494, 428495, 428517, 428519, 428521, 604218, 604230, B65D 3918
Patent
active
055275800
ABSTRACT:
A rubber stopper for a vial comprising a body member 1 and a sheet of polyethylene 3 having an average molecular weight of 1,300,000 to 8,000,000, a surface being contacted with an inner surface of a mouth and a liquid medicine, or a top surface 1b of which is covered. The molecular chains of polyethylene are partially ramified by heat to be branched and partially crosslinked with a rubber of the body. Therefore, adhesion of them is high and a smoothness of the surface of the sheet portion is improved.
REFERENCES:
patent: 1652156 (1927-12-01), Beauchamp
patent: 2696319 (1954-12-01), Menefee
patent: 3132983 (1964-05-01), Osborne
patent: 4544125 (1985-11-01), Knapp
patent: 4614276 (1986-09-01), Ihara
patent: 5009646 (1991-04-01), Sudo
Aoki Yoshihide
Ikeda Koji
Matsuzaki Masaru
Ahmad Nasser
Nissho Corporation
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