JP4867849B2 - Plastic blow molded infusion container - Google Patents

Description

  The present invention relates to a plastic blow-molded infusion container that contains infusions, glucose, and the like used for infusion therapy.

Conventionally known plastic infusion containers include bag-type containers made of plastic sheets and plastic bottle-type containers formed by blow molding.
The bottle-type infusion container has an advantage that the infusion container can be erected. However, since this type of infusion container is formed by blow molding, there is a problem in flexibility, and therefore, the container does not sufficiently crush when the chemical liquid flows out, so that a considerable amount of chemical liquid remains. Have. Therefore, conventionally, in order to infuse a liquid medicine at a constant flow rate, for example, a method of puncturing an air needle into a stopper of a container mouth portion to communicate the inside and outside of the container so that air is introduced in accordance with the outflow of the liquid medicine In order to reduce the remaining liquid, a method is employed in which a chemical solution is filled more conservatively than the container volume and the amount of gas such as air is increased.

  However, the method of puncturing an air needle into the stopper of the container mouth is troublesome because the operation for puncturing the air needle takes time and harmful bacteria may be mixed. In addition, the method of increasing the amount of gas such as air requires a space to be filled with air, and there is a problem that the container becomes larger, and if an infusion pump is used, the liquid shortage sensor may fail. This can cause a large amount of air to be injected into the patient's blood vessels, which is a problem.

  On the other hand, since the bag-type infusion container is formed of a flexible plastic sheet except for the mouth, the container itself is easily crushed when the chemical solution flows out without using an air needle. It has the advantage that no liquid is produced. However, this type of infusion container has the disadvantage that it cannot be made upright in terms of material and form, and is therefore inconvenient for infusion work.

Thus, an upright bottle-type infusion container has been proposed in which the container is easily crushed in order to reduce the amount of air and residual liquid. Four grooves that are parallel to the bottom surface are provided at appropriate positions on the wide side of the body (Patent Document 1), or both sides of the container bottom from both sides of the body run vertically through the center of both sides of the body. In addition to providing a mountain fold line leading to the section, a valley fold line is further provided on both sides of the mountain fold line, and a valley fold line in the vicinity of the bottom is provided with a valley fold line parallel to the bottom passing through both side surfaces and the front side surface of the container body. These are provided and communicated (Patent Document 2).
However, the infusion container of Patent Document 1 does not have sufficient crushing at the shoulder and bottom, and therefore, the amount of injected air is large and remains unsatisfactory. However, the shoulder, bottom, and especially the shoulders were not sufficiently crushed, and the amount of air injected was large and unsatisfactory.

No. 6-114 JP 2002-282335 A

Therefore, the present inventors can be self-supporting as a solution to the problems of the conventional infusion containers described above, can be crushed smoothly during infusion, have a small amount of residual liquid, are not bulky after waste liquid, and have a small volume at the time of waste liquid. A plastic blow molded infusion container has already been proposed (Japanese Patent Application No. 2006-259797).
However, it has been found that when the above-mentioned infusion container is subjected to high-pressure steam sterilization, the plastic constituting the container is hardened and the crushability is lowered, so that the amount of residual liquid is increased when compared with a bag.

  The present invention has been made in view of the above circumstances. The infusion container of Japanese Patent Application No. 2006-259797 has been improved, and even after the sterilization, the infusion container is smoothly crushed at the time of instillation, and the amount of residual liquid is as low as that of a bag. An object is to provide a molded infusion container.

  A plastic blow molded infusion container of the present invention is a container having a mouth, a neck, a shoulder, a trunk, and a bottom, and the trunk has a pair of wide side surfaces and a pair of narrow side surfaces. The bottom portion is formed symmetrically with respect to the major axis of the bottom portion and bent in a V shape toward the inside, and the grounding portion ridge line of the bottom portion is parallel to the major axis of the bottom portion and It is formed so that it may become a straight line in the major axis direction.

Here, the shoulder portion has a pair of wide side surfaces and a pair of narrow side surfaces, and the narrow side surfaces are shaped symmetrically with respect to the major axis and bent in a V shape toward the inside. The groove portion may be formed. Moreover, the bent part of a bottom part and a shoulder part may be provided with the crease | fold which bends inside, for example by heat press molding.
The narrow side surface of the body portion may be provided with a fold that bends outward symmetrically with respect to the major axis, for example, by hot press molding.
In addition, a crease | fold can also be formed by making the inside of a blow molding die into a negative pressure, for example. In the present invention, the inner side means the inner side of the container, and the outer side means the outer side of the container.
Although the present invention has been generally described above, a better understanding can be obtained by reference to certain specific embodiments. These examples are provided herein for illustrative purposes only and are not limiting unless otherwise specified.

  According to the present invention, the following effects can be expected. That is, the infusion container of the present invention is blow-molded so that the body portion has a pair of wide side surfaces and a pair of narrow side surfaces, so that the narrow side surfaces are thinner than the wide side surfaces. Thus, the body part is easily crushed in the minor axis direction. In addition, the bottom portion is blow-molded into a shape that is symmetrical about the major axis and bent in a V shape toward the inside, so that the bent portion between the wide side surface and the V-shaped portion is relatively thin. When the liquid is discharged, the inner wall of the wide side and the inner wall of the V-shaped portion are in close contact with each other, and the residual liquid at the bottom is almost eliminated. In addition, since the bottom contact portion ridgeline is formed so as to be parallel to the long axis of the bottom portion and straight in the long axis direction, the stress of the contact portion ridgeline portion that becomes the bent portion is formed. Are in the same direction, and the flexibility of this portion is improved. As a result, the dead space is improved and there is almost no residual liquid at the bottom even after sterilization.

  In addition, the shoulder portion has a pair of wide side surfaces and a pair of narrow side surfaces. On the narrow side surfaces, groove portions that are symmetrical with respect to the major axis and bent inward in a V shape are formed. It may be formed. In this case, the bent portion between the narrow side surface of the shoulder portion and the groove portion becomes relatively thin, and by discharging the liquid, the inner wall of the wide side surface and the inner wall of the V-shaped portion are in close contact, and the remaining shoulder portion remains. The liquid is greatly reduced. Furthermore, if a crease is provided in the bent part of the bottom part and the shoulder part, the bottom part and the shoulder part can be easily crushed in the minor axis direction. Moreover, if the fold which bend | folds outside symmetrically about a long axis is provided in the narrow side surface of a trunk | drum, it will become easy to crush a trunk | drum more to a short-axis direction. Since the volume at the time of disposal will become small if the whole container becomes easy to crush, the cost at the time of disposal can be reduced.

In conventional bottles, the amount of air injected to eliminate residual liquid is determined by the volume of the portion that is not crushed when the bottle is crushed, but the infusion container of the present invention has a bottom that is symmetrical with respect to its major axis and faces inward. In addition, by forming a V-shaped groove on the shoulder, when the liquid is discharged, the wide side surfaces of the trunk and the shoulder are respectively formed on the bottom. Since the space between the V-shaped portion and the groove portion is almost eliminated by moving in the V-shaped portion direction and the shoulder groove direction, the amount of air injection can be greatly reduced compared to the conventional one.
In addition, the V-shaped groove provided on the shoulder is fitted into a portion adjacent to the neck where the V-shaped groove is hardly crushed, so that the neck adjacent portion that becomes a dead space is filled. Furthermore, the air injection amount can be reduced.

  The bottom part is formed so as to be symmetrical with respect to the long axis of the bottom part and bent in a V shape toward the inside, and the grounding part ridge line is parallel to the long axis of the bottom part. The shoulder portion has a pair of wide side surfaces and a pair of narrow side surfaces, and the narrow side surfaces are formed symmetrically with respect to the major axis and bent in a V shape toward the inside. . In addition, a crease is provided at the bent portion of the bottom and shoulder. Further, the narrow body portion is provided with a fold that bends outward symmetrically with respect to the major axis.

First, Example 1 will be described with reference to FIGS.
1 is a front view showing an infusion container 100 of Example 1 which is an embodiment of the present invention, FIG. 2 is a side view of the infusion container of FIG. 1, and FIG. 3 is an A- of the infusion container of FIG. A sectional view, FIG. 4 is a BB sectional view of the infusion container of FIG. 2, FIG. 5 is a schematic view showing a state in which the infusion container of FIG. 1 is crushed, and FIG. 6 is a front view of the infusion container 200 of Comparative Example 1. FIG. 7 is a side view of the infusion container of FIG.
As shown in FIGS. 1 to 2, the infusion container 100 of Example 1 is a blow-molded container having a mouth portion 1, a neck portion 2, a shoulder portion 3, a trunk portion 4, and a bottom portion 5. It has a pair of wide side surfaces 41, 41 ′ and a pair of narrow side surfaces 42, 42 ′, and the bottom portion 5 is symmetrical with respect to the long axis X of the bottom portion 5 and bent in a V shape toward the inside. The grounding portion ridgeline 52 is formed so as to be parallel to the bottom major axis X and to be a straight line in the major axis X direction. The shoulder portion 3 has a pair of wide side surfaces 31 and 31 ′ and a pair of narrow side surfaces 32 and 32 ′. The narrow side surfaces 32 and 32 ′ are symmetrical with respect to the major axis and Grooves 33 and 33 'bent in a V shape toward the inside are formed. In the case of blow molding, generally, the wide side surfaces 31 and 41 of the shoulder portion 3 and the body portion 4 are symmetric with respect to the minor axis Y, and the narrow side surfaces 32 and 42 of the shoulder portion 3 and the body portion 4 are It is symmetric about the long axis X. Reference numeral 6 denotes a hanging means for hanging the infusion container.

The infusion container of Example 1 has the above-described configuration, bent portions 53 and 53 ′ between the V-shaped portion 51 of the bottom portion 5 and the wide side surfaces 41 and 41 ′ of the trunk portion 4, and the groove portion of the shoulder portion 3. The bent portions 34 and 34 'between 33 and the narrow side surface 32 of the shoulder 3 are relatively thin, and the direction of stress of the bent portions 53 and 53' is the same when the container is crushed. Become. Accordingly, the container is easily crushed by the discharge of the liquid, by moving the groove 33 direction of the V-shaped portion 51 direction and the shoulder of the bottom portion 5 broad sides 4 1,31 of the body portion 4 and the shoulder 3, respectively The space between the V-shaped portion 51 and the groove 33 is almost eliminated. Therefore, the dead space is greatly reduced, and the air injection amount can be significantly reduced as compared with the conventional one. Further, when the infusion container of Example 1 is crushed as shown in FIG. 5, the V-shaped groove portion 33 of the shoulder portion 4 is fitted into a portion adjacent to the neck portion that is not crushed, and the neck adjacent portion that becomes a dead space is formed. Since it will be filled, dead space will be further reduced.
Further, in the infusion container of Example 1, as shown in FIG. 3, the V-shaped concave portion 55 is bent toward the mouth in the vicinity of the narrow side surfaces 54, 54 ′. In the infusion container of Example 1, as shown in FIG. 3, the pair of grounding portion ridge lines 52 and 52 ′ are formed so as to be substantially parallel to the V-shaped recess 55. As shown in FIG. 4, the bottom 5 is formed in a symmetrical shape with respect to the container long axis Z in the longitudinal section of the infusion container that cuts a pair of wide side surfaces.

(Test example)
Specified capacity of 550mL, weight of 13.7g, minimum wall thickness of 0.16mm using plastic blended with LLDPE (moretech 3500Z made by Prime Polymer) and LD (LM360 made by Nippon Polyethylene) at a weight ratio of 80:20 The three blow bottles as shown in Table 1 are prepared, filled with 520 mL of raw food and 30 mL of air, respectively, sterilized by high-pressure steam at 108 ° C. for 30 minutes after stoppering, and then the inside of the bottle using a syringe. The air was extracted, and an infusion set (Nipro Corp., ISA-300A00, venous needle 18G) was connected to discharge the liquid by natural fall (drop of 80 cm from the container port to the venous needle). After draining, when the amount of residual liquid in each bottle was measured with a 50 mL syringe, the results shown in Table 2 were obtained.
From Table 2, the sterilization of the bottle 100 of Example 1 resulted in a decrease in the drainage of about 30%, but the residual liquid amount was 28.6 mg. In the case of the bottle 200 of Comparative Example 1 ( The residual liquid amount is significantly improved from the residual liquid amount (42.3 mL). Therefore, it can be seen that the amount of the remaining liquid can be significantly reduced by forming the ridgeline of the grounding portion at the bottom so as to be parallel to the long axis of the bottom.

1 is a front view showing an infusion container of Example 1. FIG. It is a side view of the infusion container of FIG. It is AA sectional drawing of the infusion container of FIG. It is BB sectional drawing of the infusion container of FIG. It is a schematic diagram which shows the state which the infusion container of FIG. 1 was crushed. 6 is a front view of an infusion container of Comparative Example 1. FIG. It is a side view of the infusion container of FIG.

Explanation of symbols

1 mouth part 2 neck part 3 shoulder part 31, 31 ′ wide side face 32, 32 ′ narrow side face 33, 33 ′ groove part 34 bent part 4 trunk part 41, 41 ′ wide side face 42, 42 ′ narrow side face 5 Bottom 51 V-shaped part 52, 52 'Grounding part ridge line 53, 53' Bent part 54, 54 'Narrow side surface 100 of bottom part Infusion container 200 of Example 1 Infusion container of comparative example
205 Bottom part 252, 252 'Grounding part ridgeline

Claims (3)

A container having a mouth, a neck, a shoulder, a trunk, and a bottom, wherein the trunk has a pair of wide side surfaces and a pair of narrow side surfaces, and the bottom portion It is formed symmetrically with respect to the major axis and bent in a V shape toward the inside, and the grounding portion ridgeline at the bottom is formed so as to be parallel to the major axis of the bottom and straight in the major axis direction. The shoulder portion has a pair of wide side surfaces and a pair of narrow side surfaces, and the narrow side surface has a groove portion that is symmetric about the major axis and bent in a V shape toward the inside. There is formed, the groove portion is Ri Na is formed continuously from the shoulder portion to the neck adjacent portion, at the time of collapse, with bent inwardly bent portion of the bottom and shoulder portion, the narrow sides of the body portion with respect to the longitudinal axis A plastic blow-molded infusion container characterized by bending outward symmetrically . The infusion container according to claim 1, wherein the bent part of the bottom part and the shoulder part is provided with a fold that is bent inward. The infusion container according to claim 1, wherein a fold that bends outward symmetrically with respect to the major axis is provided on a narrow side surface of the trunk portion.

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