CN201510519U - an infusion container - Google Patents

Abstract

The utility model provides a seamless and transparent plastic transfusion soft bag packaging container which is made by using polypropylene as a raw material and using the blow molding technology of a two-step method. The soft bag packaging container comprises an opening part, a body part and a bottom which are integrally formed. The length-to-width ratio of the cross section of the container is 2-4 times, so that the infusion container is easy to shrink and deform inwards along the short axis direction. The air needle is not needed when the infusion bottle is used, and the liquid in the container is smoothly discharged from the container at a substantially constant speed during the infusion process. The surface in the short axis direction is uniformly deformed inward without any irregular bending such as twisting.

Description

an infusion container

technical field

The utility model relates to a transfusion container, in particular to a seamless and transparent plastic transfusion soft bag packaging container made of polypropylene as a raw material and using a two-step blow molding technique.

Background technique

At present, the infusion packaging containers commonly used in the domestic and foreign markets mainly include glass bottles, plastic bottles, and non-PVC composite film soft bags. Among them, glass bottles have disadvantages such as fragility, heavy weight, inconvenient transportation and unfavorable recycling, and their share in the market is getting smaller and smaller. The non-PVC composite film soft bag does not need an air needle when in use, and can freely shrink and deform inwardly by relying on the effect of the external atmospheric pressure, and the liquid in the container can be drained by itself. It can prevent the air in the environment from polluting the drug, and ensure the efficacy of the drug and the health of the patient. The non-PVC composite film soft bag is an infusion soft bag packaging container formed by using double-layer composite film and throat, through special equipment and specific mold heat fusion molding, cutting the edge at the same time, filling the liquid medicine, and then heat-melting the lid. . However, in the production of soft bags at present, the main disadvantage of the composite film is that the quality of heat fusion is unstable, and the product is prone to liquid leakage, resulting in product scrapping, lower pass rate, and higher production cost. The plastic bottle produced by the two-step method has good transparency, high output, uniform wall thickness, light weight and low cost, and occupies an increasingly important position in the domestic market. But the disadvantage of plastic bottles is that it is difficult to drain the liquid in the container.

Utility model content

An object of the present invention is to provide a bag-shaped transfusion container with high output, high pass rate, lighter weight and lower cost.

The transfusion container provided by the utility model comprises: a mouth leading to the interior of the container, a body connected to the mouth and a bottom connected to the body, the mouth, body and The bottom is integrally formed, and the body shrinks and deforms inwardly from the middle position of the body with the continuous discharge of the liquid, and gradually extends toward the mouth and the bottom respectively. The ratio of the length and width of the cross section is greater than or equal to 2.

Further preferably, the body includes arc-shaped first and second convex walls connected to the mouth, arc-shaped third and fourth convex walls connected to the bottom, and side walls, The wall thicknesses of the first convex wall, the second convex wall, the third convex wall, the fourth convex wall and the side wall are substantially the same, and are smaller than the wall thickness of any other part of the body. Preferably, the wall thickness of the first convex wall, the second convex wall, the third convex wall, the fourth convex wall and the side wall is 0.1-0.2 mm, and the wall thickness of other parts of the body is 0.4-0.4 mm. 0.6mm.

In yet another preferred embodiment, the body includes an arc-shaped first convex wall and a second convex wall connected to the mouth, and an arc-shaped third convex wall and a fourth convex wall connected to the bottom. wall, and a side wall, the first convex wall, the second convex wall, the third convex wall, and the fourth convex wall are smaller than the wall thickness of the side wall, and the side wall is smaller than the wall thickness of other parts of the body . Preferably, the wall thickness of the first convex wall, the second convex wall, the third convex wall and the fourth convex wall is 0.1-0.2 mm, the wall thickness of the side wall is greater than 0.2 mm and less than 0.4 mm, and the The wall thickness of other parts of the body is 0.4-0.6 mm.

Further, the ratio of the length to the width of the cross section of the body is greater than or equal to 2 and less than or equal to 4. The first convex wall is symmetrical to the second convex wall, and the third convex wall is symmetrical to the fourth convex wall.

Preferably, the infusion container is made of polypropylene.

According to the infusion container of the utility model, a seamless and transparent polypropylene (PP) plastic infusion soft bag successfully realized by blow molding has the advantages of high yield, high pass rate, lighter weight, and low cost, and does not need to be drained during use. The air needle can discharge the liquid in the container smoothly from the container at a roughly constant speed, achieving the use effect of the soft bag. Because it is a one-piece blow-molded container, there is no defect of non-PVC soft bag leakage, and the same self-drainage effect as non-PVC soft bag is obtained.

Description of drawings

Fig. 1 a is the front view of the utility model transfusion container;

Figure 1b is a cross-sectional view of the body of the infusion container of the present invention;

Fig. 1c is an effect diagram after the liquid of the infusion container of the present invention is discharged;

Fig. 2 is a sectional view of an embodiment of the utility model transfusion container;

Fig. 3 is the sectional view of the second embodiment of the utility model transfusion container;

Fig. 4 is the curve diagram of the infusion speed change of the plastic infusion bottle in the prior art;

Fig. 5 is a curve diagram of non-PVC soft bag infusion speed change in the prior art;

Fig. 6 is a graph showing the variation of the infusion speed of the infusion container of the present invention.

Detailed ways

The following will describe it in combination with different embodiments of the present invention. Those skilled in the art will know that the technical features and utility model objectives of the present utility model can be realized through a variety of alternative technical solutions without creative work. Therefore, the embodiments described below are only illustrative and non-restrictive of.

Fig. 1a is a front view of the infusion container of the present invention. The transfusion container provided by the utility model includes: a mouth 100 leading to the inside of the container, a body 200 connected to the mouth and a bottom 300 connected to the body, the mouth 100, the body 200 and the bottom 300 is integrally formed, and the wall thickness of the body part 200 is smaller than that of the mouth part 100 and the bottom part 300 . As shown in FIG. 1 c , the body portion shrinks and deforms inwardly from the middle position of the body portion 200 as the liquid is continuously discharged, and then gradually extends toward the mouth portion 100 and the bottom portion 300 respectively. Referring to FIG. 1 b , the ratio of the length to the width of the cross section of the body 200 is greater than or equal to 2. Referring to FIG. As shown in the figure, the infusion container of the present invention is flat, similar to an ellipse, and the ratio of the length and width of the cross-section of the body 200 is greater than or equal to 2, which enables the container to shrink inward along the short axis when it shrinks and deforms. . Further preferably, the ratio of the length to the width of the cross section of the body is greater than or equal to 2 and less than or equal to 4. Preferably, the infusion container is made of polypropylene.

In a further preferred embodiment, the body 200 includes an arc-shaped first convex wall 201 and a second convex wall 202 connected to the mouth 100 , and an arc-shaped third convex wall 203 and a fourth convex wall 204 connected to the bottom 300 , and the sidewalls 205a, 205b, the wall thicknesses of the first convex wall 201, the second convex wall 202, the third convex wall 203, the fourth convex wall 204 and the side walls 205a, 205b are substantially the same, and are smaller than any other body part 200. The wall thickness of the part is smaller than that of the front part of the body part 200 . Preferably, the wall thickness of the first convex wall 201, the second convex wall 202, the third convex wall 203, the fourth convex wall 204 and the side walls 205a, 205b is 0.1-0.2mm, and the wall thickness of other parts of the body 200 is 0.4～0.6mm. Preferably, the first convex wall 201 and the second convex wall 202 are symmetrical, and the third convex wall 203 and the fourth convex wall 204 are symmetrical.

As shown in FIG. 2 , in yet another preferred embodiment, the body 200 includes an arc-shaped first convex wall 201 and a second convex wall 202 connected to the mouth 100 , and an arc-shaped third convex wall connected to the bottom 300 203 and the fourth convex wall 204, and side walls 205a, 205b, the first convex wall 201, the second convex wall 202, the third convex wall 203, the fourth convex wall 204 are less than the wall thickness of the side walls 205a, 205b, the side walls 205 a , 205 b are smaller than the wall thickness of the rest of the body 200 . Preferably, the wall thickness of the first convex wall 201, the second convex wall 202, the third convex wall 203, and the fourth convex wall 204 is 0.1-0.2 mm, and the wall thickness of the side walls 205a and 205b is greater than 0.2 mm and less than 0.4 mm. , the wall thickness of other parts of the body 200 is 0.4-0.6 mm. Preferably, the first convex wall 201 and the second convex wall 202 are symmetrical, and the third convex wall 203 and the fourth convex wall 204 are symmetrical.

As mentioned above, according to the infusion container of the present invention, the wall thickness of the body part 200 is scientifically formulated, the infusion container is in the shape of a bag, and can shrink and deform in an orderly manner, improving the drainage function of the infusion container.

When using the infusion container of the present utility model, the mouth 100 is facing downward, the infusion container is suspended at a certain height, the infusion hollow needle is inserted into the liquid through the rubber plug of the combined cover, and the discharge valve is adjusted to an appropriate position. Resulting in a steady discharge flow rate. Under the action of external atmospheric pressure, the side walls 206a and 206b in the direction of the short axis of the infusion container begin to deform and shrink inwardly. At the beginning, they sag inwardly from the middle of the body 200 . The middle of the body expands towards the two ends of the mouth 100 and the bottom 300, and the two side walls in the direction of the short axis gradually approach. When they are bonded together, as the liquid is continuously discharged, the bonded area also expands from the middle part to the surrounding area until all the liquid in the container is discharged, and the effect shown in Figure 1c is shown after shrinkage and deformation.

Fig. 3 is a curve diagram of the infusion speed change of the plastic infusion bottle in the prior art, and Fig. 4 is a curve diagram of the infusion speed change of the non-PVC soft bag in the prior art. Both Figure 3 and Figure 4 use a 500ml plastic infusion bottle and a 500ml non-PVC soft bag for the infusion test. Hang the infusion container at the same height, use the same infusion tube, and measure the liquid discharge speed at the same time interval. As shown in Figure 3, it can be found from the measured data and the infusion speed change curve that the infusion speed of the plastic infusion bottle is relatively fast at the beginning of the infusion, and after about 100ml of liquid is discharged, the discharge speed is relatively stable, but there are fluctuations in the middle. When the liquid in the container is left about 100ml, the discharge speed obviously slows down, only about 60% of the beginning, and it takes a long time to exhaust the liquid in the container. As shown in Figure 4, when the non-PVC soft bag discharges 100ml of liquid, the speed is relatively fast and stable, and then the discharge drops rapidly, and the discharge speed is stable in the middle. Only when there are about 20ml left in the container, the discharge speed decreases significantly.

Fig. 5 is a graph showing the variation of the infusion speed of the infusion container of the present invention. Equally with the transfusion container of 500ml according to the utility model, the infusion container starts to discharge about 250ml from liquid discharge, and at this moment, the shrinkage deformation of the container reaches the maximum value, and the liquid discharge speed also increases, and then gradually stabilizes. When about 20ml of liquid remains in the last container, the discharge speed just obviously slows down, and the time used for the discharge is the least, and the discharge speed is substantially constant (as shown in Figure 5).

According to the infusion container of the utility model, it has the advantages of high output, high pass rate, lighter weight, low cost, etc., and does not need an exhaust needle during use, and the liquid in the container can be released from the container at a substantially constant speed. Discharge in the middle to achieve the effect of using a soft bag.

In the above description, the new characteristics and advantages of the present utility model have been fully disclosed. However, this disclosure is in many respects illustrative rather than restrictive. On the basis of this disclosure, those skilled in the art can make changes in details or arrangement without departing from the scope of the present invention, including the combination or separate use of various features and advantages of the present invention.

Claims (8)

1. infusion vessel comprises:

An oral area that leads to described internal tank;

A body that is connected with described oral area;

One bottom being connected with described body;

Described oral area, body and bottom are one-body molded, the wall thickness of described body is less than described oral area and described bottom, described body is with the continuous discharge of liquid, direction inwardly contraction distortion earlier from described body centre position, and extend to described oral area and described bottom direction respectively gradually, the length of described body cross section and wide ratio are more than or equal to 2.

2. infusion vessel as claimed in claim 1, it is characterized in that, described body comprises the arc first protruding wall and the second protruding wall that is connected with described oral area, arc the 3rd protruding wall and the 4th protruding wall that are connected with described bottom, and sidewall, the wall thickness of the described first protruding wall, the second protruding wall, the 3rd protruding wall, the 4th protruding wall and sidewall is basic identical, and less than the wall thickness at other any positions of described body.

3. infusion vessel as claimed in claim 1, it is characterized in that, described body comprises and the arc first protruding wall and the second protruding wall that are connected with described oral area, arc the 3rd protruding wall and the 4th protruding wall that are connected with described bottom, and sidewall, the described first protruding wall, the second protruding wall, the 3rd protruding wall, the 4th protruding wall are less than the wall thickness of described sidewall, and described sidewall is less than the wall thickness at other positions of described body.

4. infusion vessel as claimed in claim 2 is characterized in that, the wall thickness of the described first protruding wall, the second protruding wall, the 3rd protruding wall, the 4th protruding wall and described sidewall is 0.1～0.2mm, and the wall thickness at other positions of described body is 0.4～0.6mm.

5. infusion vessel as claimed in claim 3, it is characterized in that, the wall thickness of the described first protruding wall, the second protruding wall, the 3rd protruding wall, the 4th protruding wall is 0.1～0.2mm, and the wall thickness of described sidewall is greater than 0.2mm and less than 0.4mm, and the wall thickness at other positions of described body is 0.4～0.6mm.

6. as claim 1,2,3,4 or 5 described infusion vessels, it is characterized in that the length of described body cross section and wide ratio be more than or equal to 2, and be less than or equal to 4.

7. as claim 2,3,4 or 5 described infusion vessels, it is characterized in that the described first protruding wall and the second protruding wall symmetry, the described the 3rd protruding wall and the 4th protruding wall symmetry.

8. as claim 2,3,4 or 5 described infusion vessels, it is characterized in that described infusion vessel is made by polypropylene.

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