Safety filter based on coupling principle and manufacturing method of safety filter

Abstract

The invention relates to the technical field of medical equipment, in particular to a safety filter based on the coupling principle and a manufacturing method of the safety filter. According to the safety filter, materials are used as a coupling layer between two different materials by utilizing the characteristic that the similarity of the materials exists between the two materials with different ingredients skillfully, so that a filter membrane which is difficult to bond is tightly bonded with a filter membrane support or the bonding strength of the filter membrane is enhanced by the coupling layer, and the filter is safe. In addition, on the basis of the safety filter, the invention further provides a manufacturing method.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a safety filter based on a coupling principle, which is a fluid filter component for medical supplies including infusion sets and blood transfusion sets. Background technique [0002] Fluid filters are used in many components of existing medical device products, and these fluids include liquids or gases, especially typical and widespread infusion sets. Infusion sets have proposed in recent years some technical solutions for setting up safe infusion sets using the bubble point (or bubble point) characteristics of the filter membrane. Prevent air from entering blood vessels and cause medical accidents to achieve the purpose of safety. Among them, Chinese patent application 201010290116.5 is a manufacturing method of a safety infusion set based on the principle of bubble point pressure or 201110278362.3 is a safety infusion set based on the principle of bubble point pressur...

AI Technical Summary

Problems solved by technology

These technical solutions are advanced and feasible, and the key to their realization is to select a filter membrane with a bubble point value and to bond or weld the filter membrane tightly and without gaps on the filter housing, not just to meet the It is enough to be fixed on the shell and achieve the filtration efficiency. Obviously, it needs to be higher than the conventional filter membrane fixing requirements, that is, there must be no gaps and leakage on the joint surface, and a certain joint strength is required to withstand Due to the water column pressure of about 1 meter high produced by the bubble point characteristics, the filter membrane will not loosen, otherwise, the bubble point characteristics of the filter membrane will not work, and the safety will not be discussed

However, judging from the current international manufacturing level of filter membranes, the mainstream filter membranes that meet the application requirements of infusion sets all have a characteristic that they cannot be directly bonded to materials suitable for making filter housings or brackets. Or welding, which caused the problem that these excellent filter membranes could not be effectively applied to the infusion set, and directly led to the inability to realize the technical solution of the so-called safe infusion set

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