Extrusion-molded two-layer tube for medical use and infusion bag product

Abstract

An extrusion-molded two-layer tube for medical use that is inserted from the outside into a resin member to be bonded that is for medical use, said tube being closely joined thereto by blocking by heating, and is characterized by: the use in an inner layer thereof of polyethylene, polypropylene, a styrene-based elastomer, an olefin-based elastomer, a mixture of these, or a raw material having these as the main component thereof, the raw material having a melting point of no more than the heating temperature; the use in an outer layer thereof of polypropylene, a styrene-based elastomer, an olefin-based elastomer, a mixture of these, or a raw material having these as the main component thereof, the raw material having a melting point greater than the heating temperature; and the thickness of the outer layer being 2%-5% of the thickness of the extrusion-molded two-layer tube overall.

Description

technical field [0001] The invention relates to a medical extruded double-layer tube and an infusion bag product using the tube, in particular to a medical extruded double-layer tube that does not stick to each other or between the tube and other parts during heat sterilization And infusion bag products with excellent operability. Background technique [0002] The performance required for a medical tube includes safety to a medical solution, flexibility, and bondability with a member to be joined. [0003] For example, infusion bags such as peritoneal dialysis bags used by patients at home are individually packaged with a packaging resin film for hygienic purposes, heated at a predetermined temperature, and circulated. At this time, the medical tube and other joined members of the infusion bag are closely joined by adhesion utilizing thermal load. [0004] Thereby, in the manufacturing process of the product packed in a tube, reduction of the number of processes, reduction...

AI Technical Summary

Problems solved by technology

[0008] In the past, as disclosed in Japanese Patent Publication No. 1-31389, a method of reducing the contact area between the surface of the pipe and the member to be joined has also been proposed, but it only stops at alleviating the phenomenon of sticking, but cannot eliminate the problem of sticking

[0009] In addition, in order to prevent the sticking of the tube and the resin film for packaging, the method of inserting other sheets such as non-woven fabrics may also be considered, but considering the increase in the number of product manufacturing processes and waste, and from the viewpoint of price, it is not necessarily the best option. preferred

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