Container for medical use

A flexible and collapsible container for medical use which has an improved low temperature characteristic and can withstand high temperatures of high-pressure steam sterilization, comprising:

• a container main body having a thickness of 0.1 to 0.6 mm made by irradiating a hollow molding having a desired container shape, formed of an ethylene-vinyl acetate copolymer containing 10 to 35% by weight of vinyl acetate, with an electron beam to cross-link the copolymer whereby said cross-linked copolymer has a gel content of 50 to 80% by weight, said main body being completely sealed at its periphery except for a predetermined portion providing a non sealed portion;
• a functional accessory for achieving the function of the container, having an end portion inserted in the non-sealed portion of the main body, said functional accessory being made of a polymeric material selected from the group consisting of high density polyethylene;
• a first mixture containing a high density polyethylene and an ethylene-vinyl acetate copolymer wherein the amount of the ethylene-vinyl acetate copolymer is not more than 80% by weight;
• a polypropylene;
• and a second mixture containing a polypropylene and an ethylene-vinyl acetate copolymer wherein the amount of the ethylene-vinyl acetate copolymer is not more than 85% by weight, and wherein the amount of vinyl acetate in the copolymer of each of the first and second mixture is from 15 to 40% by weight, said polymeric material having sufficient heat resistance to withstand high-pressure steam sterilization and which adheres to the ethylene-vinyl acetate copolymer of the container main body at high temperatures;
• and
• an interlayer for sealing said container main body at the non-sealed portion thereof to the inserted end portion of said functional accessory, said interlayer being made of a non-cross-linked ethylene-vinyl acetate copolymer containing 15 to 40% by weight of vinyl acetate.