Pre-filled high-temperature sterilization syringe

Abstract

The invention belongs to the technical field of syringes, in particular suitable for a drug injection mode for animals, and discloses a pre-filled high-temperature sterilization syringe. The pre-filled high-temperature sterilization syringe comprises a tube cap, a needle tube, a push rod and a piston, wherein the part, near the handle end of the needle tube, of the needle tube is provided with a stop ring, and the front end of the needle tube is provided with an external thread; the tube cap is provided with an internal thread, and the tube cap and the needle tube are assembled through rotation of the threads; the outer diameter of the push rod is matched with the inner diameter of a handle, and the outer diameter of the piston and the inner diameter of the needle tube are in an interference fit for sealing; the stop ring is welded to the part, near the handle end of the needle tube, of the needle tube, and during assembly, the push rod runs through the inner hole of the handle and assembled with the piston so as to form a locking structure after assembly. According to the pre-filled high-temperature sterilization syringe, a filling machine is used to inject a certain amount of drug liquid through the top of the needle tube of the syringe, the tube cap and the needle tube are assembled through rotation of the threads so that sealing and locking can be achieved, and the syringe is delivered into a sterilization chamber for steam sterilization at a high temperature of 121 DEG C for 30 minutes.

Description

technical field [0001] The invention belongs to the field of veterinary drug packaging materials industry, and in particular relates to a prefilled high-temperature sterilization syringe (perfusion device). Background technique [0002] At present, ordinary pre-filled syringes cannot be sterilized by high-temperature steam after filling the liquid medicine, because the sterilization temperature is 121°C, and the sterilization time is 30 minutes; the pistons of existing pre-filled syringes are mostly made of LDPE or butyl rubber materials, of which The Vicat softening point temperature of LDPE material is 95°C, and it is not resistant to high temperature. When the sterilization temperature exceeds 95°C, the piston softens due to the expansion of the liquid medicine in the needle tube, and the liquid medicine is very easy to leak from the piston position. At the same time, the structure of the existing syringe body It cannot be sterilized at high temperature. The needle tube i...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a prefilled syringe suitable for high temperature sterilization, which solves the problem of limited resources and high cost caused by gamma ray sterilization, which may cause stability problems for some drugs , Sterility assurance issues

Images