KR101611845B1

KR101611845B1 - Liquid bag with ellipse tube

Info

Publication number: KR101611845B1
Application number: KR1020150058316A
Authority: KR
Inventors: 김준형; 신상선
Original assignee: 제이더블유케미타운 주식회사
Priority date: 2015-04-24
Filing date: 2015-04-24
Publication date: 2016-04-27

Abstract

The present invention relates to a liquid container having an elliptical tube.
A chamber 102 in which a drug is stored is formed inside the chamber 102. A first sealing portion 121 and a second sealing portion 121 are disposed around the chamber 102, 2 sealing part 122 is integrally coupled to the sealing part 120 so as to isolate the chamber 102 from the outside and the tube 200 is disposed at one side of the sealing part 120 with the first sealing part 121, And a second sealing portion 122 which is inserted into the chamber 102 so that the drug can be injected into the chamber 102 through the tube 200 or discharged out of the chamber 102, ) Has a shape in which the cross-sectional length in the transverse direction is 1.5 to 2.5 times larger than the cross-sectional length in the longitudinal direction.
According to the present invention, the inner circumferential surface of the tube is formed such that the airtight coupling of the port is formed in a cylindrical shape so that the outer circumferential surface is shaped like an ellipse so that the thickness in the transverse direction is made thick and the thickness in the longitudinal direction is made thin, The concentration of stress is minimized when the pressure is increased or an external impact is generated to minimize the occurrence of leakage at the tube connection portion and to form a large number of peelable partition walls having a characteristic of being peeled off at a lower pressure than the seal portion, The width of the peelable partition wall is gradually narrowed toward the tube side so that when a drug is to be mixed and discharged, a narrow portion, which is a portion adjacent to the tube, can be relatively first peeled off And even though the tube side is relatively narrower than the opposite side The longitudinal direction thickness of the tube is not the tubes by minimizing the stress concentration at the portion in handling, the partition wall can be added peeling separation during storage when made thinner than the thickness of the horizontal direction in transport and storage when high pressures occur.

Description

[0001] Liquid bag with ellipse tube [0002]

The present invention relates to a liquid container in which liquid is stored, wherein the shape of the tube to which the port for injecting or discharging the drug is connected is thicker in the transverse direction than in the longitudinal direction, The present invention also relates to an oval tube having an elliptical tube in which an integrally joined portion is prevented from being peeled off by a load or an impact at the time of storage and movement so that the drug is not exposed to the outside.

The liquid container (or plastic bag) for packaging the chemical liquid requires properties such as flexibility, transparency, gas barrier property, drug compatibility, sterilization heat resistance, heat sealability, drop impact resistance and the like.

A bag-type flexible plastic container having a single chamber or multiple chambers is used as the liquid container.

In addition, the fluid container is equipped with a tube so that the port can be connected to allow the drug to be injected or discharged into the interior.

Generally, the main body of the liquid receiver is required to have a greater flexibility, and the thickness of the body is relatively thin. For this purpose, the body is manufactured by a co-extrusion method or a lamination method.

Tube is a medium for port connection and is made of hard tube which is conventionally manufactured by injection molding in order to improve airtightness with the port. Recently, due to the development of various airtightness improving means of soft and hard connection parts, .

As shown in Fig. 1, a port (2) is connected to a tube (1) by a technique related to a tube of a liquid container, and a " inlet port for a liquid container "(Korean Patent Laid-Open Publication No. 10-2009-0077561, And the tube 1 is formed into a cylindrical shape.

In addition, in the "integral filling system and multi-chamber container equipped therewith" (Korean Patent Registration No. 10-0586708, Patent Document 2), the tube thickness is kept constant and the shape of the tube is longer than the transverse direction A long oval shape is disclosed.

Fig. 2 shows a process for integrally joining a tube having the same shape as in Patent Document 1 or Patent Document 2 to a liquid receiver.

Referring to the drawing, the portion to be inserted with the tube is not adhered when the film is adhered by the method of thermally adhering the periphery of the film. In this state, the tube 4 is inserted into the space between the two films 5, And the mold 3 corresponding to the shape of the outer circumferential surface of the tube is pressurized in a heating state in a direction facing each other.

After the adhesive is applied in such a heated state, it is subjected to a cooling process.

Since the tube 4 has a sectional shape with a constant thickness and a circular shape, the portion of the film 5 in the non-bonded state in the process of being pressed by the metal mold 3 is stretched compared with the other portions, And the physical properties are lowered.

In addition, since the bent angle of the bent portion 5a, which is the bent portion of the film 5 due to the tube shape, becomes large, stress is generated in this portion after the heat bonding. 2 and the phenomenon of peeling from the surface of the tube 4 as shown in Fig.

In order to compensate for this, there is a problem in that a process loss occurs when pressing as an auxiliary means or attaching another film to adhere it is performed.

In FIG. 3, it is well known that a conventional liquid container using such a circular tube becomes uneven in surface area where the tube is joined.

In addition, when such a circular tube or tube is formed in an elliptic shape having a longer length in the longitudinal direction than in the transverse direction, the stress at the connection portion between the tube and the film may be increased There is a problem that the contents are broken and leaked to the outside.

KR 10-2009-0077561 (July 15, 2009) KR 10-0586708 (2006.05.29)

In order to solve the problems of the conventional art as described above, the shape of the tube is shaped like an ellipse so that the length in the transverse direction is longer than the length in the longitudinal direction And minimizes the concentration of stress when the pressure inside the chamber is increased or an external impact is generated, thereby minimizing the occurrence of leakage in the tube connection portion.

In addition, the present invention is also applicable to a hybrid type multi-chamber in which a plurality of peelable barrier ribs having a characteristic of being peeled off by a pressure lower than that of the sealing portion are formed so that the width of the peelable barrier rib is gradually narrowed toward the tube side So that when the drug is mixed and discharged, the narrow portion, which is the portion adjacent to the tube, can be relatively peeled off first.

In addition, although the tube side is relatively narrower than the opposite side, the length of the tube in the longitudinal direction is thinner than the length in the transverse direction, which minimizes the concentration of stress in the portion where the tube is located when high pressure is generated during transportation and storage Thereby preventing the peelable partition wall from peeling off during transportation and storage.

In order to solve the above-mentioned problems, a fluid container with an elliptical tube according to the present invention is formed of a flexible synthetic resin sheet, and a chamber 102 in which a drug is stored is formed. Around the chamber 102, A sealing part 120 separating the chamber 102 from the outside by integrally joining the first sealing part 121 and the second sealing part 122 located opposite to each other is provided, The tube 200 is engaged while being sandwiched between the first seal 121 and the second seal 122 so that the drug is injected into the chamber 102 through the tube 200 or out of the chamber 102 The tube 200 has a cross-sectional length of 1.5 to 2.5 times larger than a cross-sectional length of the tube in the longitudinal direction.

The thickness of the tube 200 between the inner circumferential surface 210 and the outer circumferential surface 220 of the tube 200 is determined by the thickness of the first sealing portion 121 and the second sealing portion 210. [ The thickness c of the sealing portion 122 in the transverse direction which is in line with the engagement surface of the sealing portion 122 is 1.5 to 2.5 times greater than the thickness d of the longitudinal direction in the direction perpendicular to the transverse direction.

In this configuration, the tube 200 is characterized in that the thickness c in the transverse direction is two times larger than the thickness d in the longitudinal direction.

The tube 200 is manufactured by an extrusion method so as to have flexibility. In the state where the first sealing portion 121 and the second sealing portion 122 facing each other are not coupled to each other, The upper mold and the lower mold having an inner circumferential surface corresponding to the first sealing portion 121 and the second sealing portion 122 are integrally joined to each other by being moved and pressed in a heating state in a direction in which the upper and lower molds face each other.

The chamber 100 is divided into a plurality of chambers by a peelable partition wall portion 110 having a property that the seal portion 120 is peeled off by a pressure lower than the inner pressure of the chamber 100 to be peeled off, The separable partition wall portion 110 is characterized in that the width a gradually narrows from a position distant from the tube 200 toward the tube 200.

In this case, the narrow portion of the peelable partition wall portion 110 and the tube 200 are formed on the same side of the sealing portion 120.

According to the present invention, since the shape of the tube takes an elliptical shape, the length in the transverse direction is formed longer than the length in the longitudinal direction, minimizing concentration of stress when the pressure inside the chamber is increased or an external impact is generated, Leakage from the joints is minimized.

In addition, the present invention is also applicable to a hybrid type multi-chamber in which a plurality of peelable barrier ribs having a characteristic of being peeled off by a pressure lower than that of the sealing portion are formed so that the width of the peelable barrier rib is gradually narrowed toward the tube side A narrow portion, which is a portion adjacent to the tube, can be relatively first peeled off when mixing and discharging the drug.

In addition, although the tube side is relatively narrower than the opposite side, the length of the tube in the longitudinal direction is thinner than the length in the transverse direction, which minimizes the concentration of stress in the portion where the tube is located when high pressure is generated during transportation and storage So that the peelable partition wall portion is not peeled off during transportation and storage.

1 is a perspective view showing a conventional liquid container;
FIG. 2 is a schematic view showing a process of forming a tube integrally in the conventional process of manufacturing a liquid receiver. FIG.
3 is a photograph showing a conventional tube installation part.
4 is a front view and a cross-sectional view showing one embodiment of a liquid container with an elliptical tube of the present invention.
5 and 6 are stress distribution diagrams according to the prior art and the present invention through a structural analysis program.
FIG. 7 is a schematic view showing a process of bonding a tube to an infusion container together with a tube according to the present invention; FIG.

A single-layer or multi-layer film using a single or a plurality of synthetic resins may be produced by a co-extrusion method, a lamination method, or the like.

Examples of the material of the film include polyethylene, polypropylene, and polyolefin-based materials, and thermoplastic elastomer blends, nylon, and polyethylene terephthalate.

Accordingly, when a drug such as liquid is injected into the synthetic resin sheet having flexibility, the manufactured liquid container is inflated to fill the contents.

The sapphire container of the present invention includes a sealing part 120 for isolating the chamber 102 from the outside by integrally joining the first sealing part 121 and the second sealing part 122 which are opposite to each other around the chamber 102, Respectively.

At this time, a tube 200 is coupled to the one side of the sealing part 120 while being sandwiched between the first sealing part 121 and the second sealing part 122 so that the drug is injected into the chamber 102 through the tube 200 And can be discharged to the outside from the chamber 102.

In the case of the present invention, the chamber 102 in which the drug is stored is formed singly or in multiple.

In the case of the multiple chamber 102, the plurality of chambers 100 are formed by the peelable partition wall portion 110 which is peeled off by the internal pressure of about 1/2 to 1/10 of the sealing portion 120 .

The formation of the peelable partition wall portion 110 is soft-sealed as in the prior art and has an easy peel characteristic that is easily opened by external physical force

4, the tube 200 of the present invention is characterized in that the cross-sectional length of the tube 200 takes an elliptic shape that is longer than the cross-sectional length of the longitudinal axis.

At this time, it is preferable that the cross-sectional length in the transverse direction is 1.5 to 2.5 times larger than the cross-sectional length in the longitudinal direction.

The thickness of the tube 200 between the inner circumferential surface 210 and the outer circumferential surface 220 of the tube 200 is determined by the thickness of the first sealing portion 121 and the second sealing portion 210. [ (C) in a direction perpendicular to the transverse direction may be 1.5 to 2.5 times greater than the thickness (d) in the transverse direction in the direction perpendicular to the transverse direction.

More preferably, the tube 200 is formed such that the transverse axial thickness c is two times larger than the longitudinal axial thickness d.

At this time, the tube 200 may be made of a hard material, but more preferably has a soft characteristic produced by an extrusion method.

5 to 6 show the result of stress evaluation through a MIDAS structural analysis program having the same inner diameter and a cylindrical cross sectional shape, the thickness in the vertical axis direction being 5 mm and the thickness in the horizontal axis direction being different from each other .

The liquid container was set to an elastic modulus of 1790N / mm2, a flexural modulus of 0.395, and a mass density of 1.071e-006kg /,. The physical properties of the container were flexible, 1.2N / ㎟ with modulus of elasticity of 0.49, mass density of 8.7e -07 kg /..

The load conditions were assumed to be 5 kg * 9.8 m / s ² as the drop load, and under the same conditions as the sliding conditions between the liquid and the container under the contact conditions.

FIG. 5 shows the maximum stress at 3.16 Mpa at the tube connecting portion as a result of setting the thickness in the transverse direction to 5 mm under the condition of a conventional general tube.

On the other hand, FIG. 6 shows that the thickness of the tube according to the present invention is 10 mm in the transverse direction, and the maximum stress is 0.9775435 MPa, which is about 1/3 lower than the conventional condition.

In addition, the maximum stress of 1.01Mpa was measured at 8mm thickness, and the maximum stress was measured at 1.3Mpa when the transverse thickness was 12.5mm. .

When a tube shape according to the present invention is used, the maximum stress value applied to the connecting portion of the tube 200 is generally lower than that of a conventional tube. Therefore, It is expected that much less damage will be done.

The liquid container of the present invention having the above-described structure can be manufactured by the same process as shown in FIG. 7 as a method for integrally joining the tube 200 to the sheet.

First, the surfaces of the sheets corresponding to each other are heated, pressed and adhered along the circumference to form a sealing portion, and the portion to be inserted with the tube 200 is not bonded as in the conventional method to form a space.

7, the tube 200 is placed in a space between the first sealing portion 121 and the second sealing portion 122, and the rod pin 400 is inserted into the tube 200 An upper mold 300 and an upper mold 300 having an inner circumferential surface corresponding to the outer circumferential surface shape of the tube 200 are formed on the upper portion of the first sealing portion 121 and the lower portion of the second sealing portion 122, The mold 310 is disposed.

Then, the two molds 300 and 310 are integrally joined to the first sealing portion 121 and the second sealing portion 122 by being pressed and moved in the heating direction in the direction facing each other.

Then, the rod pin 400 and the two molds 300 and 310 are separated from each other, and cooled to integrate the tube 200.

According to this process, the tube 200 is thinner in the longitudinal direction and thicker in the transverse direction than in the prior art, and takes an elliptic shape that is formed in the horizontal direction, so that the stress concentration phenomenon is less likely to occur as in the result of the structural analysis programming described above.

In the above-described configuration, when the liquid receiver is composed of the multiple chambers 100 by the peelable partition wall 110, the part of the peelable partition wall 110, to which the tube 200 is connected, The protruded shape of the protruding portion has a risk of being easily peeled off from other portions.

When the pressure is increased due to a load or shock during transportation or storage, the longitudinal axis of the tube 200 is made thin, so that the peelable partition wall portion 110 is also less peeled off.

By using this point, the peelable partition wall portion 110 can be partially reduced in thickness and maintained in the same performance as in the prior art.

Or by increasing the width of the opposite portion of the point where the tube 200 is connected, leading to less peeling even when a larger pressure is applied than in the prior art.

As shown in FIG. 4, the width a may be gradually narrowed toward the tube 200 from a position distant from the tube 200.

At this time, the width of the peelable partition wall 110 may be about 10 to 20 mm, and the width of the peelable partition wall 110 may be about 5 to 10 mm.

In addition, the peel strength of the wide portion may be 5 to 15 N / 15 mm, but it is preferable that the peel strength is 16 to 25 N / mm, which is higher than that of the conventional peel strength.

Further, the peeling strength of the narrow portion may be in the range of 5 to 15 N / 15 mm.

Generally, in the case of multiple chambers with peelable bulkheads, peeling force is small at the partitions where tubes are located, but bulkheads at distances farther from the tubes are subjected to high loads during transportation or storage. The force to be exfoliated becomes more effective due to the characteristics of the material.

However, if the width of the peelable partition wall 110 is configured so as to be gradually thinner toward the direction in which the tube 200 is positioned, when the upper load is applied, the peelable partition wall 110 is peeled off at a position opposite to the point where the tube 200 is connected And the point at which the tube 200 is connected to the point where the tube 200 is connected is relatively thin. Therefore, when the tube 200 is curled like a scroll from a point far from the tube 200, it is easily peeled off when pressure is applied The mixing of contents can be performed.

Typically, multi-chamber vessels often have different volumes than if the chambers were of the same volume.

For example, when the liquid A, the liquid B and the liquid C filled in each chamber are each composed of a liquid emulsion, an amino acid solution, or a glucose solution mainly containing refined soybean oil, the amount of the liquid A is about half that of the liquid B or C The volume of each chamber is inevitably changed.

In the case of the different chambers of the conventional chambers, when the chambers are horizontally loaded for transportation and storage, the chambers having a relatively larger volume are swollen upward, Respectively.

As a result, the diaphragm forming the boundary of the chamber having a large volume is more easily peeled off when the load is overloaded or impacted.

This phenomenon is likely to occur in the same manner even when the peelable partition wall having a variable width shape is formed as described above.

The sealing part 120 includes a lower circumferential part 123 to which the tube 200 is connected, an upper circumferential part 124 formed on the opposite side of the lower circumferential part 123, The peelable partition wall portion 110 has one end connected to the sidewall portion 125 and the other end portion connected to the lower sidewall portion 123, And the other end is connected to the lower circumferential portion 123 and the other end is connected to the lower circumferential portion 123 and the other end is connected to the lower circumferential portion 123, And a vertical portion 112 that is gradually narrowed in width a.

4, the volume of the chambers 100 divided by the peelable partition wall portion 110 is larger than that of the outer chamber 101, but is divided by the vertical portion 112 The widths b of the chambers 100 are equal to each other so that when the contents are inflated, the height of the chambers 100 becomes the same or roughly equal to the height of the chambers 100, It is possible to prevent the peeling phenomenon due to the difference in volume between the chambers.

In addition, when the chamber 100 is composed of three or more chambers 100 including the central chamber 102 and the outer chambers 101 outside the central chamber 102, the separable partition wall portion 110 for dividing the chambers 100, (A) of the same size to exhibit the same supporting force.

At this time, when the side wall connecting portion 111 is bent in the vertical direction from the vertical portion 112 toward the side wall portion 125, stress may be generated at a point where the side wall portion 125 and the vertical portion 112 are connected, As shown in the drawing, the sidewall connection portion 111 is formed at a position corresponding to the vertical portion 112 from the point where it is connected to the vertical portion 112, as shown in FIG. And may be connected to the side wall portion 125 in a rounded shape along the longitudinal direction.

In this case, the stress at the connection point is minimized, thereby reducing the separation at the connection point.

In this case, since the width b of each chamber with respect to the vertical portions 112 of the lower portion is the same and the width a of the vertical portions 112 is also the same, The load is not concentrated in one of the chambers 100, so that the occurrence of peeling at a specific point can be minimized.

The present invention is intended to be applied to various medical infusion bottles having a tube for maintaining an environment isolated from the outside, and it is also applicable to a multi-chamber container having a partition wall which is separated by a specific pressure I will do it.

In addition, it is also possible to apply to various flexible containers requiring excellent internal and external sealing performance.

100: chamber 101: outer chamber
102: central chamber 110: peelable partition wall portion
111: side wall connecting portion 112: vertical portion
120: sealing part 121: first sealing part
122: second sealing portion 123: lower end portion
124: upper circumferential portion 125:
200: tube 210: inner peripheral surface
220: outer peripheral surface 300: upper mold
310: lower mold 400: rod pin

Claims

A chamber 100 in which a drug is stored is formed inside the chamber 100 and a first sealing portion 121 and a second sealing portion 122 located opposite to each other are formed around the chamber 100 A tube 200 is disposed at one side of the sealing part 120 to seal the first sealing part 121 and the second sealing part 122, And the drug can be injected into the chamber 100 through the tube 200 or discharged to the outside from the chamber 100,
The length of the tube 200 in the transverse direction is 1.5 to 2.5 times larger than the length in the longitudinal direction of the tube 200,
The chamber 100 is divided into three portions by two separable partition walls 110 having a property that the seal portion 120 is peeled off by a pressure lower than the internal pressure of the chamber 100 from which the seal portion 120 is peeled In addition,
The width a of the two strippable barrier ribs 110 are the same as each other,
The sealing portion 120 includes a lower circumferential portion 123 to which the tube 200 is connected,
An upper circumferential portion 124 formed on the opposite side of the lower circumferential portion 123,
And two side wall portions 125 connecting both ends of the lower circumferential portion 123 and the upper circumferential portion 124,
The peelable partition wall portion 110 has one end connected to the side wall portion 125 and has a constant width in the range of 10 to 20 mm and has a rounded shape and has a peel strength of 16 to 25 N / One end of the connecting portion 111 is connected to the end of the side wall connecting portion 111 and the other end of the connecting portion 111 is connected to the lower circumferential portion 123. The width a gradually narrows toward the lower circumferential portion 123, Is composed of a vertical part 112 having a width of 5 to 10 mm and a peel strength of 5 to 15 N / 15 mm,
The chambers 100 divided by the peelable partition wall portion 110 have different volumes and the widths b of the chambers 100 at the points divided by the vertical portions 112 are equal to each other &Lt; / RTI >
A liquid container having an elliptical tube.

The method according to claim 1,
The tube (200)
The inner peripheral surface 210 has a circular cross-sectional shape,
The thickness between the inner circumferential surface 210 and the outer circumferential surface 220 of the tube 200 is set so that the thickness c in the transverse axial direction which is in line with the mating surfaces of the first sealing portion 121 and the second sealing portion 122 is larger than the thickness (D) in the direction perpendicular to the direction of the longitudinal axis (d).
A liquid container having an elliptical tube.

3. The method according to any one of claims 1 to 2,
The tube 200 is manufactured by an extrusion method to have flexibility,
The upper mold 300 and the lower mold 310 having the inner circumferential surface corresponding to the outer circumferential surface shape of the tube 200 in the state where the first sealing portion 121 and the second sealing portion 122 facing each other are not coupled, Is formed integrally with the first sealing portion (121) and the second sealing portion (122) by being moved and pressed in a heating state in a viewing direction.
A liquid container having an elliptical tube.

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