Polypropylene (PP) connector for intravenous (IV) bag and manufacturing method of PP connector

Abstract

The invention discloses a polypropylene (PP) connector for an intravenous (IV) bag. The PP connector comprises a fixing base, a liquid catheter and a connecting ring, wherein the liquid catheter is arranged in the center of the fixing base, two ends at the periphery of the fixing base are provided with thin edges, the cross section of the periphery is in a shape that the thin edges are gradually transitional from the center of the liquid catheter to the two ends, the periphery of the fixing base is fixed between inner films of an intravenous bag body, one end of the liquid catheter penetrates through the center of the fixing base and reaches the bottom end, which is positioned in the intravenous bag, of the fixing base, the other end of the liquid catheter is connected with the connecting ring, and the connecting ring is fixedly connected with a combination cover for transfusion. The fixing airtightness between the fixing base of the connector and the inner surface of the intravenous bag is greatly improved; the fixing bag adopts a strengthening rib structure, so materials can be more saved; the inner structure of the liquid catheter is an oblique structure, so liquid medicine can be convenient to fill; the connector can be manufactured by direct injection moulding according to the shape of the connector, the manufacturing technique is simple, convenient and easy; the manufactured connector does not deform or discolor in the sterilizing processing procedure at 121 DEG C, the strength is high, and the safety is high.

Description

technical field [0001] The invention relates to the technical field of medical packaging, in particular to a polypropylene interface for an infusion bag used for connecting a body of an infusion bag and a combined cover for infusion and a preparation method thereof. Background technique [0002] With the general application of infusion therapy, the infusion method has gone through the development process from open, semi-open to fully closed, and the infusion set has changed from the initial glass bottle, to polyvinyl chloride (PVC) soft bag, to polyvinyl chloride (PVC) soft bag, to poly Propylene, polyethylene (PP / PE) hard plastic bottles, until the latest international packaging materials non-PVC composite film soft bag. The material quality of the non-PVC composite film soft bag meets the standards of the European Pharmacopoeia, the Japanese Pharmacopoeia and the United States Pharmacopoeia. It has very low water permeability, air permeability and migration, and is suitabl...

AI Technical Summary

Problems solved by technology

[0003] With the increasing use of non-PVC composite film soft bags for infusion, the problems existing in the use of non-PVC composite film infusion bags are becoming more and more obvious: the soft film of non-PVC composite film soft bags is connected to the conventionally used polypropylene interface The welding between them is prone to problems, resulting in the leakage of the infusion bag, which has always been an insurmountable problem

[0004] An interface is provided at the output end of the non-PVC composite film infusion bag, and a fixed seat fixed with the infusion bag is arranged in the interface. Due to the unreasonable structure of the fixed seat in the prior art, it is easy to cause a gap between the interface and the inner membrane of the infusion bag. Welding is not firm, resulting in water leakage and seepage

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