A hemodialyzer with polypropylene shell and manufacturing method thereof

Abstract

The invention discloses a hemodialyzer with a polypropylene material outer shell and a manufacturing method thereof, and relates to the field of hemodialysis. The hemodialyzer comprises an outer shell body and membrane fibers. The outer shell body comprises an end cover and a tubular body, and the outer shell body is made of polypropylene. A welding bulge loop which is matched with the end face of the body is arranged at the position, opposite to the end face of the tubular body, of the end cover. The welding bulge loop of the end cover and the tubular body are welded together through ultrasonic waves. The manufacturing method of the hemodialyzer with the polypropylene material outer shell includes the steps that injection molding, pre-assembling, sintering, centrifugal can sealing and cropping of the end cover and the tubular body are conducted, the end cover is fixedly mounted on the tubular body, and leak hunting, drying and assembling are carried out on a dust cap. Plasma activating treatment is conducted on the end cover and the tubular body. The outer shell body is not poisonous, using is safe, the cost of raw materials is low, the molding cycle is short, and the preparation efficiency is high. The manufacturing method saves time and labor, improves efficiency, lowers manufacturing cost, and prevents a sealing ring from releasing substances harmful to the health of people when the end cover and the tubular body are in ultrasonic welding.

Description

Technical field [0001] The invention relates to the field of hemodialysis, in particular to a hemodialyzer used in a polypropylene shell and a manufacturing method thereof. Background technique [0002] We know that hemodialysis is one of the renal replacement treatments for patients with acute and chronic renal failure. It drains the blood from the body to the body through a dialyzer composed of countless hollow fibers. The blood and the electrolyte solution (dialysis fluid) with similar concentrations of the body are exchanged inside and outside the hollow fibers through diffusion / convection. , Remove the metabolic waste in the body, maintain electrolyte and acid-base balance; at the same time remove excessive water in the body. [0003] In 2011, the scale of China's hemodialysis equipment consumables was nearly 7 billion, but it is still less than 5% of the world scale. Only 15%-20% of patients with advanced renal failure in China receive dialysis treatment, which is very diffe...

AI Technical Summary

Problems solved by technology

[0003] In 2011, the scale of hemodialysis equipment consumables in China was nearly 7 billion, but it was still less than 5% of the world scale. Only 15%-20% of patients with advanced renal failure in China received dialysis treatment, which was quite different from the dialysis rate of 95% in developed countries in the world. , the entire market has great potential, and at the same time brings huge business opportunities and unprecedented pressure to domestic dialysis manufacturers

The end cover and the main body are connected by threads, and the sealing ring is pressed on the end surface of the resin glue to realize the sealing. Due to the dimensional error in production and the operation error when the end cover and the tubular main body are assembled, the threaded connection between the end cover and the tubular main body The degree of fastening varies, and vibration or impact may cause loosening during packaging and transportation, and there is a risk of seal failure and liquid leakage during use by patients

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