JP2002053136A - Liquid container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid container and a container for a dialysis treatment solution wherein a liquid can be abundantly discharged even if a tank is full. SOLUTION: An approximately parallelopiped plastic hollow container 10 includes handles 13 and 14 respectively provided approximately at the center of a top plate 11 and approximately at the center of a front plate 12 of the parallelopiped. A liquid inlet/outlet opening 16 facing upward is provided at an end toward a front plate on the top plate 11. The inside of the handle 14 on the front plate 12 is a hollow cylinder, forming a part of the container 10. The opening 16 is located on an extension of the hollow cylinder. A plastic constituting the container for a dialysis treatment solution comprises, as a molding material, a resin composition comprising a polyethylene and/or an ethylene.α-olefin copolymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container suitable for containing, storing and transporting a liquid, especially an artificial dialysate.

[0002]

2. Description of the Related Art A generally rectangular parallelepiped plastic hollow container called a polytank is frequently used in daily life, for example, for storing and transporting kerosene, and its structure is well known (not shown). The liquid such as kerosene stored in the plastic tank is drained from the discharge opening by tilting the tank with the upper handle. If the liquid is almost full, a closed space (air pocket) created in the upper corner of the tank
In addition, it is difficult to make up for inflow of supplementary air, so it is not possible to discharge abundantly.

In order to eliminate such an obstacle, a container wall at a position which becomes a closed space when the tank containing liquid is tilted,
An openable / closable air inlet is provided and opened as needed to discharge the liquid. However, the material such as polyethylene which forms the container wall of the polytank does not have sufficient rigidity and thickness. Therefore, even when the air inlet is open, the side wall of the container is first slightly dented with the discharge of the liquid, and the operation of returning the air from the air inlet to restore the dent is repeated. This is a so-called pulsation phenomenon, in which the liquid is intermittently discharged while making a sound at regular intervals, preventing ample discharge. As a result, there arises a problem that the liquid is scattered or the discharge of the liquid cannot be stopped at an arbitrary timing.

On the other hand, for example, Japanese Utility Model Laid-Open Publication No. 60-33009 discloses a polytank called a double handle polytank. This plastic tank has a shape in which one corner of a top of a rectangular parallelepiped is cut off, and one handle is provided on each of the top plane and the surface facing the discharge port. Further, the top of the rectangular parallelepiped is drawn with a cap which seems to be an air inlet similar to a conventional plastic tank. This double-handle polytank has two handles so that a stable discharge operation can be performed, so that excessive pouring is prevented, and safe operation and loss prevention can be achieved.

[0005]

However, even in the case of the poly tank described in this publication, the problem that the liquid is scattered due to the pulsation phenomenon which occurs when the tank is full, and the discharge of the liquid cannot be stopped at an arbitrary timing. Has not been resolved.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and provides a liquid container and an artificial dialysis liquid container capable of discharging the liquid extremely abundantly even when the tank is full. It is intended to be.

[0007]

A liquid container according to the present invention, which has been made to achieve the above object, has a substantially rectangular parallelepiped plastic hollow container as shown in FIG.
In the figure, handles 13 and 14 are provided at substantially the center of the rectangular parallelepiped top plate 11 and substantially the center of the front plate 12, respectively, and the liquid inlet / outlet 16 facing upward at the end of the top plate 11 close to the front plate. The inside of the handle 14 of the front plate portion 12 is a hollow cylinder and forms a part of the hollow of the container 10, and the liquid inlet / outlet opening 16 is located on a substantially linear extension of the hollow cylinder. The cross section of the hollow cylinder of the handle 14 is preferably circular or oval.

In this liquid container, the liquid inlet / outlet opening 16 is located on the top plate portion 11 and faces upward. Therefore, when the liquid is set up and stored and transported in a state where the liquid is almost full (see FIG. 2), the cap 17 is used. There is no leakage from the opening even if there is looseness. On the other hand, since the liquid inlet / outlet opening 16 is located on a linear extension of the inner hollow cylinder of the handle 14, when the liquid is drained in a state close to being full, hold the handle 14 and turn the front plate 12 upward. When the air is discharged (see FIG. 3), the air pool above the container communicates with the outside through the liquid inlet / outlet 16 and does not become a closed space, so that the pulsation phenomenon is eliminated. Therefore, the liquid can be sufficiently drained.

Another object of the present invention is to provide a container for artificial dialysis solution according to the present invention, wherein the plastic constituting the liquid container is a resin composition comprising polyethylene or / and an ethylene / α-olefin copolymer. As a molding raw material, at least one selected from olefin polymers of ethylene, propylene, butene-1, 4-methyl-pentene-1, hexene-1 or octene-1 in the resin composition, and copolymers thereof. One type is at least 50% by weight.

The raw material for molding has a density of 0.930 to 0.970 g / cm ³ measured according to JIS-K7140 and a melt flow index (melt flow rate, Melt F
lowRate: MFR) 0.01-0.60g / 10mi
If the resin composition is selected in the range of n, it can be properly carried out.

Further, this molding raw material is characterized in that an evaporation residue in an evaporation residue test method for determining the total amount of substances (inorganic and organic substances) precipitated by water does not exceed 30 ppm, and that a reducing substance (for example, heavy metal) precipitated by water It is preferable to select a resin composition in which the consumption amount of potassium permanganate does not exceed 10 ppm in the potassium permanganate consumption test method for quantifying the amount of).

Since the container is made of such a plastic material, it is possible to prevent foreign substances from being dissolved and mixed from the plastic material into the artificial dialysate to be contained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a liquid container to which the present invention is applied will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing one embodiment of the liquid container of the present invention. As shown in FIG.
Is made of a substantially rectangular parallelepiped polyethylene having a top plate 11, a bottom plate, a front plate 12, a rear plate, and both side plates. It is integrally formed by blow molding, and can store liquid in the hollow inside.

At the center of the top plate 11, a thick plate-like handle 13 is integrally formed. At the center of the front plate 12, a cylindrical handle 14 is formed integrally with a part of the front plate 12 as a tube wall, and the inner space of the tube communicates with the inner hollow of the entire liquid container.
A liquid inlet / outlet opening 16 is provided at an end of the top plate 11 on the front plate 12 side. The neck of the liquid inlet / outlet opening 16 is directed substantially upward,
The upper part is inclined to the front plate 12 side, and a male screw for screwing the cap 17 is formed around the periphery. The inside of the cylinder of the handle 14 is in a positional relationship in which the liquid can be seen from the liquid inlet / outlet opening 16 to the bottom plate along the front plate 12.

When transporting the container 10 containing the liquid, the handle 13 is gripped by a finger as shown in FIG. Thus, it can also be stored in an upright state. Even a liquid that is almost full does not touch the edge of the liquid inlet / outlet opening 16, so that even if the cap 17 is loose, there is no seepage of the liquid.

When the liquid is drained from the container 10 when the container is almost full, the handle 13 is grasped and the front plate 12 is turned up, so that the liquid inlet / outlet opening 16 becomes substantially horizontal as shown in FIG. At this time, the inside of the cylinder of the liquid inlet / outlet 16 and the handle 14 communicating therewith is the uppermost part of the container. Through the outside world. Therefore, the pulsation phenomenon is eliminated because the air is abundantly introduced into the container as much as the liquid flows out. If the liquid is drained to a certain extent or more, specifically, when the top plate 11 is turned upright with the top plate 11 facing upward, the boundary line of the liquid is only opened toward the liquid inlet / outlet opening 16.
2 with the handle 13 up and open it, or
It is optional to open it up (holding the handle 14).

In order to drain the liquid from the container 10 by using a pump, as shown in FIG.
1 is inserted into the container 10 through the liquid inlet / outlet opening 16. The hard insertion tube 21 is inserted while being in contact with the inner wall of the inner hollow cylinder of the handle 14, and further contacts the inner wall of the front plate 12 near the bottom. Therefore, the pump 20 is supported by these and does not wobble.

As shown in FIG. 5, the liquid can be sucked by inserting the flexible insertion tube 22 into the container 10.
A cap 23 with a coupler is placed over the liquid inlet / outlet opening 16. A flexible insertion tube 22 is connected to the cap 23 with a coupler, and a vent hole is formed around the flexible insertion tube 22. The plug of the suction tube 24 is fitted into the coupler of the cap with coupler 23. The suction pipe 24 is a suction pump (not shown).
Is connected to Connect the flexible insertion tube 22 to the liquid inlet / outlet opening 1
6, the flexible insertion tube 22
Is inserted in contact with the inner wall of the inner hollow cylinder of the handle 14 while being slightly bent, and the side surface of the tube tip is pressed against the bottom surface to be stabilized. Therefore, it is possible to prevent the flexible insertion tube 22 from being unsteady and the air is not sucked.

In order to use this liquid container as a container for artificial dialysis fluid, it is necessary to mold the container using the raw resin composition selected according to the requirements of the present invention.

Examples of artificial dialysis fluid containers to which the present invention is applied and comparative examples of containers to which the present invention is not applied are described below.

Example 1 The density was 0.956 g / cm ³ and the MFR was 0.45 g / 1.
0 min, and the evaporation residue by ultrapure water is 10 ppm
And polyethylene pellets having a potassium permanganate consumption of 5 ppm were collected at 50 m / m and L / D = 22.
In an extruder (D: screw diameter, L: effective screw length), the mixture was melted at 185 ° C. and extruded into a cylindrical parison. The extruded parison was sandwiched between molds, compressed air of 6 kg / cm ² was blown from a blow pin, and cooled with a mold cooled to 20 ° C. to form a container having a corresponding shape.

Next, using this container, the Japanese Pharmacopoeia No. 13
When the test according to the revision was performed, all the purity tests were passed.

Also, since there is only one opening when filling and discharging the contents, each operation can be performed with one opening, and no pulsation occurs at the time of drainage by decantation, and the operation is smooth. Drainage was possible. On the other hand, when the liquid was drained by inserting the tube from the outside, the tube was fixed due to the structure of the container, and the tube did not violate inside the can.

Further, when the container was filled with 10 L of the contents and stacked, no distortion was observed in the container at the time of stacking 10 layers.

Example 2 Density: 0.959 g / cm ³ , MFR: 0.34 g / 1
0 min, a polyethylene pellet having an evaporation residue of 25 ppm and a potassium permanganate consumption of 7 ppm was extruded at 50 m / m, L / D = 22 (D: screw diameter, L: screw effective length). And extruded into a cylindrical parison. The extruded parison is sandwiched between molds and 6 kg / cm ² from the blow pin.
Of compressed air was blown, and cooled with a mold cooled to 20 ° C. to form a container having a corresponding shape.

Next, using this container, the Japanese Pharmacopoeia No. 13
When the test according to the revision was performed, all the purity tests were passed.

Also, since there is only one opening for filling and discharging the contents, each operation can be performed with one opening, and pulsation does not occur at the time of drainage by decantation, and the operation is smooth. Drainage was possible. On the other hand, when the liquid was drained by inserting the tube from the outside, the tube was fixed due to the structure of the container, and the tube did not violate inside the can.

Further, when the container was filled with 10 L of the content and stacked, no distortion was observed in the container at the time of stacking 10 layers.

[0030]

[Table 1]

The evaporation residue was determined by the following test method. Wash the raw resin pellet sample well with water, and the surface area of the sample 1c
Leave for 30 minutes while maintaining at 60 ° C. using 2 ml of water per m ² . 200 to 300 ml of this test liquid is placed in a platinum or quartz evaporation dish of known weight, which has been dried at 105 ° C. in advance, and evaporated to dryness on a water bath. Then, after drying at 105 ° C. for 2 hours, it is left to cool in a desiccator. After cooling, weigh and measure the difference in weight a (m
g) is determined, and the amount of the evaporation residue is determined by the following equation.

[0032]

(Equation 1) b is the blank test value obtained for the same volume of leaching solution as the test solution.

The amount of potassium permanganate consumed was determined by the following test method. Wash the sample thoroughly with water and use 2 ml of water per 1 cm ² of its surface area while maintaining at 60 ° C. for 30 minutes.
Let stand for a minute and use this as the test solution. Next, 100 ml of water, 5 ml of sulfuric acid and 5 ml of a 0.002 mol / l potassium permanganate solution are put into an Erlenmeyer flask, and after boiling for 5 minutes, the liquid is discarded and washed with water. Take 100 ml of the test solution into this Erlenmeyer flask, add 5 ml of sulfuric acid, heat and boil for 5 minutes. Stop heating, immediately add 10 ml of 0.01 mol / l sodium oxalate solution to decolorize,
Titrate with 002 mol / l potassium permanganate solution until the red color remains without disappearing

Separately, a blank test is performed in the same manner, and the potassium permanganate consumption is determined by the following equation.

[0035]

(Equation 2)

A is the titer (ml) of the 0.002 mol / l potassium permanganate solution in this test, and b is the titer (ml) of the 0.002 mol / l potassium permanganate solution in the blank test.

COMPARATIVE EXAMPLE 1 A single port was prepared under the same raw material and molding conditions as in Example 1, and when the content liquid was discharged by decantation using a handle, the port was lower than the liquid level inside the can. A container having the following structure was formed. This container was filled with contents and discharged,
Pulsation occurred in the discharging operation, and the contents were scattered.

COMPARATIVE EXAMPLE 2 Under the same raw materials and molding conditions as in Example 1, a container which was very similar to the corresponding container but did not have the structure of the handle 14 was formed.
The contents were filled and discharged into this container, but when draining by inserting a tube from the outside, the suction and discharge of the contents was attempted. The tip jumped out of the liquid and sucked the air. In addition, when the container was filled with 10 L of the content and stacked, the container was distorted when stacked five times, and further stacking was impossible.

[0039]

As described above in detail, the liquid container to which the present invention is applied has no pulsation phenomenon even when the liquid is almost full, and the liquid is intermittently discharged while making a sound. It is no longer necessary and is discharged abundantly. As a result, scattering of the liquid can be prevented, and discharge of the liquid can be stopped at an arbitrary timing. Further, when the liquid is discharged by the pump, the pump does not fluctuate, so that a stable discharge operation can be performed.

Further, the artificial dialysate container of the present invention can prevent foreign substances from being dissolved and mixed into the artificial dialysate from the material of the container.
High purity can be maintained.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a liquid container to which the present invention is applied.

FIG. 2 is a side view showing an example of a state in which the liquid container of the embodiment is used.

FIG. 3 is a side view showing an example of another use state of the liquid container.

FIG. 4 is a side view showing an example of still another use state of the liquid container.

FIG. 5 is a side view showing an example of still another use state of the liquid container.

[Explanation of symbols]

10 is a container, 11 is a top plate, 12 is a front plate, 13 is a handle, 1
4 is a cylindrical handle, 16 is a liquid inlet / outlet opening, 17 is a cap,
20 is a pump, 21 is a rigid insertion tube, 22 is a flexible insertion tube, 23 is a cap with a coupler, and 24 is a suction tube.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B65D 1/02 A61J 1/00 311 313J 350 (72) Inventor Akihiro Adachi 1-348-Funabara, Shimizu-shi, Shizuoka Prefecture 15 F term (reference) 3E033 AA20 BA15 CA20 DE01 FA03 GA02 3E062 AA07 AB01 AC02 HA01 HA03 HA08 HB02 HB10 HC01 KA04 KB17 4C077 AA05 BB01 DD30 KK01 KK25 PP08 PP19

Claims (5)

[Claims] In a substantially rectangular parallelepiped plastic hollow container, handles are respectively provided at substantially a center of a top plate portion and a substantially center of a front plate portion of the rectangular parallelepiped, and an upper end of the top plate portion near the front plate faces upward. It has a liquid inlet / outlet, and the inside of the handle of the front plate part is a hollow cylinder to form a part of the hollow of the container, and the liquid inlet / outlet is located on a substantially linear extension of the hollow cylinder. A liquid container characterized by the above-mentioned. 2. The liquid container according to claim 1, wherein the hollow cylinder has a circular or elliptical cross section. 3. The liquid container according to claim 1, wherein
The plastic composition is made of a resin composition comprising polyethylene or / and an ethylene / α-olefin copolymer, and the resin composition contains ethylene, propylene, butene-1, 4-methyl-pentene-1, hexene-1 in the resin composition. Or 50% by weight of at least one selected from olefin polymers of octene-1 and copolymers thereof;
An artificial dialysate container characterized by the above. 4. The molding raw material has a density measured according to JIS-K7140 of 0.930 to 0.970 g / cm.
³ , the melt flow index is 0.01 to 0.60 g
The artificial dialysate container according to claim 3, which is the resin composition selected in a range of / 10 min. 5. The resin composition according to claim 1, wherein the evaporation residue in the evaporation residue test method for determining the total amount of substances precipitated by water does not exceed 30 ppm, and the amount of the reducing substance precipitated by water is determined. The artificial dialysis solution container according to claim 3, wherein the resin composition is a resin composition selected within a range not exceeding 10 ppm of potassium permanganate consumption in a potassium manganate consumption test method.