초록 ▼

A bag for storing liquids for medical purposes such as blood and liquids for parenteral administration and which has neutral physiological properties is made of polyolefin material that is more specially in the form of a polyethylene film for the body of the bag and a copolymer of ethylene and vinyl

A bag for storing liquids for medical purposes such as blood and liquids for parenteral administration and which has neutral physiological properties is made of polyolefin material that is more specially in the form of a polyethylene film for the body of the bag and a copolymer of ethylene and vinyl acetate, with more specially 20 to 32% by weight of vinyl acetate, as a material for the hose connector. The copolymer is welded to the material of the body of the bag and then cross linked.

대표청구항 ▼

1. A polyolefin film storage bag for storing liquids, having at least one opening of hose-like structure welded thereto, said at least one structure comprising a cross linked copolymer of 60-95% by weight of olefin and 5-40% by weight of vinyl acetate wherein the olefin of the polyolefin film storag

1. A polyolefin film storage bag for storing liquids, having at least one opening of hose-like structure welded thereto, said at least one structure comprising a cross linked copolymer of 60-95% by weight of olefin and 5-40% by weight of vinyl acetate wherein the olefin of the polyolefin film storage bag and the olefin of the copolymer are selected from the group consisting of ethylene, propylene, n-butylene, isobutylene, 4-methylpentene-1, chlorosulfonated ethylene, styrene, vinyl fluoride, vinylidene fluoride, and vinylidene chloride. 2. The bag as claimed in claim 1 wherein said polyolefin is selected from the group: polyethylene, polypropylene, poly-n-butylene, polyisobutylene, poly-4-methylpentene-1, chlorosulfonated polyethylene, polystyrene, halogenated polyethylene, polymethyl metacrylate, copolymers thereof. 3. The bag as claimed in claim 2 wherein the initial softening temperature of the polyethylene is over 116 degrees C. 4. The bag as claimed in claim 3 wherein said polyethylene is in the form of a layer of film or foil and is laminated to a film selected from the group: polyamide film, polyvinylidene chloride film, polyethylene terephthalate film and polyester film and said polyethylene layer provides the inner surface of the bag. 5. The bag as claimed in claim 1 wherein said copolymer has an olefin level of 80 to 68% by weight and a vinyl acetate level of 20 to 32% by weight. 6. The bag as claimed in claim 1 wherein the hose like structures are designed to be joined with closing means selected from the group consisting of infusion stoppers and syringe stoppers. 7. The bag as claimed in claim 1 wherein the openings in said structure are closed by a pierceable diaphragm. 8. The bag according to claim 1 wherein said hose like structure comprises a hose like inlet opening and a hose like outlet opening. 9. The bag in accordance to claim 1 wherein the hose like structure comprises a solid male insert means having at least one opening therethrough for communicating between the interior and the exterior of the bag. 10. The bag as claimed in claim 7 wherein the portion of the opening outwardly of the diaphragm is closed by a closing means. 11. The bag as claimed in claim 10 wherein said closing means is selected from the group of closing means consisting of a weld and a stopper. 12. The bag as claimed in claim 7 wherein the hose like structure is provided with an internal narrowing means and said diaphragm is placed inwardly of said narrowing means. 13. The bag as is claimed in claim 11 wherein said closing means is removable. 14. The bag as is claimed in claim 1 wherein the outer ends of said openings are enclosed by portions of the edges of said bag welded around them. 15. A polyolefin storage bag for storing liquids having at least one opening of hose like structure said at least one structure comprising a previously uncross-linked copolymer of 60-95% by weight of olefin and 5--40% by weight of vinyl acetate first welded to said bag and then cross-linked wherein the olefin of the polyolefin film storage bag and the olefin of the copolymer are selected from the group consisting of ethylene, propylene, n-butylene, isobutylene, 4-methylpentene-1, chlorosulfonated ethylene, styrene, vinyl fluoride, vinylidene fluoride, and vinylidene chloride. 16. The bag as claimed in claim 15 wherein the cross linking has been undertaken with high energy radiation. 17. A polyethylene film storage bag for storing liquids having at least one opening of hose like structure welded thereto, said at least one structure comprising a radiation cross-linked copolymer of 60 to 95% by weight of polyethylene and 5 to 40% by weight of vinyl acetate. 18. A polyethylene storage bag for storing liquids having at least one opening of hose-like structure, said at least one structure comprising a previously uncross-linked copolymer of 60 to 95% by weight of polyethylene and 5 to 40% by weight of vinyl acetate first welded to said bag and then cross-linked by high energy radiation to provide a sterilizeable ethylene vinyl acetate hose-like structure. 19. A laminar film storage bag comprising a laminate of polyethylene on the inner side and polyamide on the outer side for storing liquids having at least one opening of hose-like structure welded thereto, said at least one structure comprising a cross-linked copolymer of 60 to 95% by weight of polyethylene and 5 to 40% by weight of vinyl acetate. 20. A laminar storage bag comprising polyethylene sheet on the inner side and a polyamide sheet on the outer side for storing liquids, having at least one opening of hose-like structure, said at least one structure comprising a previously uncross-linked copolymer of 60 to 95% by weight of polyethylene and 5 to 40% by weight of vinyl acetate first welded to said bag and then cross-linked by high energy radiation to provide a sterilizeable ethylene vinyl acetate hose-like structure.