Novel plastic infusion bag and manufacturing method thereof

Abstract

The invention discloses a novel plastic infusion bag and a manufacturing method of the novel plastic infusion bag. The novel plastic infusion bag comprises a bag body, an infusion bag opening and a hanging structure, wherein the infusion bag opening and the hanging structure are connected with the two ends of the bag body respectively,. The bag body is of a flat shape in the state of being filled with liquid medicine, that is to say, the width of the bag body is larger than the thickness of the bag body when the bag body is on a cross section perpendicular to a connecting line of the infusion bag opening and the hanging structure. Guide ribs are symmetrically arranged on thickness surfaces on the two sides of the bag body. In the infusion process, the bag body can deform along the guide ribs on the two sides of the bag body so that serious deformation and distortion cannot occur, and safety and reliability in use are improved. The manufacturing process of the novel plastic infusion bag comprises the step of blowing the bag body to make the bag body be formed without soldering seal of four edges, so that the microleakage problem is solved; since all process steps are completed in one time period, time for storing the bag body is eliminated, and the possibility of pollution is reduced. The novel plastic infusion bag has the advantages of being capable of being emptied automatically without blood return, free of serious deformation and distortion, and capable of being placed in an upright mode when in use.

Description

technical field [0001] The invention relates to a filling container for medical liquid, in particular to a novel plastic transfusion bag and a manufacturing method thereof. [0002] Background technique [0003] At present, medical infusion containers mainly include several commonly used types such as glass bottles, plastic bottles and soft plastic bags. [0004] Glass bottles have good transparency, compatibility, thermal stability, anti-extrusion deformation and water and gas barrier properties. These excellent properties make medical glass infusion bottles widely used. However, during the infusion process, it is necessary to continuously introduce air into the glass bottle through the ventilation line, so that the infusion can continue to proceed smoothly. Due to the need to introduce air into the bottle, the dust and microorganisms (such as bacteria, fungi, etc.) in the air can enter the glass bottle through the return air line. Although it has been filtered, it canno...

AI Technical Summary

Problems solved by technology

However, the problem of the above two patents is that the structure is still similar to the hard plastic bottle, which makes the pressure contrast during the infusion process and causes the venous return of blood, making the infusion not safe enough

However, in the process of actual use, it is found that the infusion bag body will be severely deformed and twisted as the liquid in the bag decreases, and there is still room for improvement in its safety performance during use.

[0010] Chinese Patent No. 200710134792.1 discloses "a medical infusion soft bag and its manufacturing method and shaping method", which has the following disadvantages: the infusion bag mouth is matched with a polypropylene composite cover purchased from outside, and the melting point is not completely consistent with the bag material. Check the sealing effect at all times; toughened plastic is added to the raw material of the infusion bag, which is expensive and low in safety and controllability; the ratio of the width to the thickness of the infusion bag is greater than or equal to 3, which will affect the self-draining performance of the liquid medicine; the infusion bag The side surface is a smooth curved arc, which is not conducive to the self-emptying of the liquid medicine; the infusion bag body is made of soft plastic, and the infusion bag body must be placed in the inner cavity of the mold of the corresponding shape to obtain the final shape; the pull-ring type polypropylene combination cover will The pull ring is easy to break and difficult to pull open, and the water vapor in the pull ring is easy to infiltrate during sterilization, causing pollution; at the same time, the one-step method of its production process (injection stretch blowing, only for the bag body, excluding the combined cover) or two-step method (Injection, bag making) are relatively complex and susceptible to foreign matter

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