Claims
- 1. A semi-rigid biomedical article for use in handling vital fluids consisting essentially of a blend of about 20-50% medical grade radiation stabilized polypropylene by weight, the balance being a copolymer of ethylene and a comonomer selected from the group consisting of (i) vinyl esters of saturated carboxylic acids having up to 8 carbon atoms in the acid moiety, and (ii) alkyl ester of .alpha.,.beta. ethylenically unsaturated carboxylic acids having from 3 to 8 carbon atoms in the acid moiety and from 2 to 8 carbon atoms in the alkyl moiety said comonomer comprising about 1-15 mole percent of the copolymer, said article having been irradiated to a dose of ionizing radiation ranging from about 1 to 35 Mrad; steam sterilized; and heat-sealed; said blend being free of toxic amounts of migratable components and possessive of flexibility, tensile and impact strengths suited for handling vital fluids.
- 2. The article of claim 1 wherein said ethylene copolymer is selected from the group consisting of ethylene/ethyl acrylate and ethylene/vinyl acetate.
- 3. The article of claim 2 wherein said comonomer content ranges from about 3.5 to about 6.5 mole percent of said copolymer.
- 4. The article of claim 3 wherein said radiation dose ranges between about 10 and 20 Mrad.
- 5. The article of claims 1, 2, 3 or 4 wherein said blend comprises 25% polypropylene by weight.
- 6. The article of claim 4 wherein the dose is about 12.5 Mrad.
Parent Case Info
This is a continuation of application Ser. No. 65,411, filed Aug. 10, 1979.
US Referenced Citations (13)
Non-Patent Literature Citations (1)
Entry |
Industrial & Engineering Chemistry, "Polypropertied Polymers", vol. 45, Sep. 1953, pp. 11A & 13A. |
Continuations (1)
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Number |
Date |
Country |
Parent |
65411 |
Aug 1979 |
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