Stock material or miscellaneous articles – Hollow or container type article – Paper containing
Patent
1994-09-22
1997-02-11
Thibodeau, Paul J.
Stock material or miscellaneous articles
Hollow or container type article
Paper containing
428 347, 428 352, 428 357, 428500, 428515, 428870, 428522, 428523, 525 55, 525 88, 525 89, 525 90, 525 95, 525222, 525237, 525240, 525241, 525302, 525418, 156 731, B32B 2708, B32B 2732, B32B 2730, B32B 108
Patent
active
056018894
ABSTRACT:
This invention relates to a polymer article prepared by the process comprising the steps of: (1) blending polymer composition comprising (A) at least one ethylene vinyl acetate copolymer, (B) at least one propylene ethylene copolymer, and (C) (1) from about 0.01% to about 5% by weight of a cross-linking agent, (2) from about 0.1% to about 35% by weight of one or more polymers selected from: (i) at least one co-, or terpolymer of at least one vinyl aromatic compound; (ii) at least one co-, or terpolymer of an alpha-olefin, and at least one monomer selected from the group consisting of an acrylic acid, an acrylic ester, a vinyl silane, and a vinyl alcohol; (iii) at least one polyolefin other than a propylene homopolymer or a propylene-ethylene copolymer; (iv) at least one polyetheramide block copolymer; (v) at least one ionomer; (vi) at least one oxidized polyolefin wax, or mixtures of (1) and (2); and forming the polymer composition into the article. This invention also relates to articles such as bags, pouches, tubing, closures, etc. The polymer articles of the present invention can be used to form a variety of medical parts with good mechanical properties. The polymer articles are RF weldable and have a low specific gravity, allowing down-gauging and improved processing relative to PVC. In addition, the polymer articles are sterilizable by a wide variety of methods including steam, gamma, ethylene oxide and E-beam techniques, as well as possessing high contact and see-through clarity and excellent barrier properties. These polymer films are halogen free. The articles do not produce toxic or corrosive chemicals upon incineration. Thus, these articles do not pose an environmental disposal problem.
REFERENCES:
patent: 4636412 (1987-01-01), Field
patent: 4997083 (1991-03-01), Loretti et al.
patent: 5042176 (1991-08-01), Rudy
patent: 5100721 (1992-03-01), Akao
patent: 5135785 (1992-08-01), Millon
patent: 5274035 (1993-12-01), Chundury
Database WPI 85-287890 "Blood bag having excellent strength, flexibility, etc.-is made of addn. polymerised silicon rubber inner layer and polymer blend outer layer".
European Search Report EP 93 91 2095.
Bhatia Rajeev S.
Chundury Deenadayalu
Critharis Mary
Ferro Corporation
Thibodeau Paul J.
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