JP2008074443A - Spout and container with spout equipped with spout - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spout excellent in gas barrier properties preventing oxygen from entering a container and also excellent in productivity, and to provide the container equipped with the spout. <P>SOLUTION: The spout has a cylindrical spout part 2 and a fitting part 3 fitted on an opening part of a container main body. A multi-layered diaphragm 6 whose intermediate layer 5 consisting of a functional resin is integrally provided at a position closing the spout 4 of the spouting part, and gas is blocked to a position reaching the fitting part from the multi-layered diaphragm. As a gas barrier means, the multi-layered diaphragm is provided so as to be positioned in a sealing part 11 between the container main body 10, or a multi-layered cylindrical sleeve in which the functional resin layer is used as the intermediate layer is provided at the spout part on the container main body side more than the multi-layered diaphragm so as to extend to the sealing part between the container main body and the spout part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention has a gas barrier property that is attached to the opening of a spout attached to a container body such as a pouch, particularly a container having a gas barrier property that accommodates contents that are likely to be altered by oxygen, such as an infusion solution or enteral nutrient. The present invention relates to a spout having a spout and a spout-equipped container equipped with the spout.

Conventionally, containers that contain infusions such as amino acid infusions and fat emulsions, oral medicinal liquids such as enteral nutrients and liquid foods, and blood, food, and other contents that are easily altered by oxygen, are made up of highly gas barrier materials. However, the spout attached to the container body is usually formed of a single polyolefin resin, and the gas barrier property is not sufficient. Therefore, in order to prevent oxygen from entering from the spout part and prevent the deterioration of the contents completely, and to ensure a more complete gas barrier property, the container is inserted into an outer bag formed of a material having a high gas barrier property. In addition, there is a problem that it must be further sealed and packaged. In order to solve the problem, various spouts devised so that a part of the cylindrical portion of the spout has a layer made of a material having gas barrier properties have been proposed as disclosed in, for example, Patent Documents 1 to 4.
JP-A-11-29159 Japanese Patent Laid-Open No. 11-128317 JP 2006-1557 A JP 2006-82826 A

  In the conventional proposal, oxygen from the cylindrical portion is obtained by attaching a film having a gas barrier property to the cylindrical wall of the cylindrical portion, or having an intermediate layer having an excellent gas barrier property inside the cylindrical wall. However, a sealing material such as a film having a gas barrier property, which is a separate member for blocking the spout, is attached to the intrusion of oxygen from the opening. For example, as shown in Patent Document 2, it is relatively easy to attach the sealing material to the top of the spout, but there is a problem that a separate process is required. Further, in that case, in order to prevent oxygen from entering from the peripheral wall of the extraction tube portion, it is necessary to secure a barrier property to the top portion of the extraction tube portion as shown in Patent Document 2, so that the production is complicated and the production cost is increased. There is a problem that it becomes high. Further, for example, as shown in Patent Documents 1 and 4, providing at the bottom of the spout has a drawback that the production process becomes complicated and the productivity is lacking, and it is difficult to put it into practical use.

  Then, this invention aims at providing the spout which was excellent in the gas barrier property which prevents the penetration | invasion of the oxygen into the container through a spout, and was excellent also in productivity, and the container with a spout equipped with this spout. .

  In order to solve the above-mentioned problems, the present inventor has made various studies, and as a result, the diaphragm that closes the spout in the middle of the spout cylindrical spout is a thin multi-layered diaphragm made of a functional resin. It has been found that by blocking the gas from the diaphragm to at least the seal portion on the container body side, gas such as oxygen from the spout can be highly prevented, and the present invention has been achieved. Is.

  That is, the spout of the present invention according to claim 1 that solves the above problem is a spout having a cylindrical spout portion and an attachment portion that is attached to an opening portion of the container body, and the spout of the spout portion. And a gas barrier means for blocking gas from the multilayer diaphragm to a position reaching the mounting portion. Is. Here, the functional resin refers to a resin having a gas barrier property such as air (oxygen), or a resin blended with an oxygen absorbing material such as iron that absorbs oxygen or the like and having an oxygen absorbing property. The gas barrier means that these resins cause a gas barrier that prevents the permeation of gas or a function of absorbing a specific gas such as oxygen to prevent the gas from entering the container. means.

The invention according to claim 2 is the spout according to claim 1, wherein the gas blocking means from the multilayer diaphragm to a position reaching the mounting portion is located in the seal portion with the container body. It is characterized by being provided as follows.
According to a third aspect of the present invention, in the spout according to the first aspect, the gas shut-off means from the multilayer diaphragm to the position reaching the attachment portion is provided with functionality on the outlet side on the container body side from the multilayer diaphragm. A multilayer cylindrical sleeve having a resin tank as an intermediate layer is provided so as to extend into the seal portion with the container body.
The invention according to claim 4 is the spout according to claim 1, wherein the gas blocking means from the multilayer diaphragm to a position reaching the mounting portion is a multilayer bottomed cylindrical body in which the multilayer diaphragm is the bottom. The multilayer cylindrical body portion of the multilayer bottomed cylindrical body is provided so as to extend into the seal portion with the container main body.
Further, the invention according to claim 5 is the spout according to any one of claims 1 to 4, wherein an easy-opening portion is provided on the bottom surface of the multilayer bottomed cylindrical body.

  Furthermore, in the invention according to claim 6, the container main body is formed of a gas barrier material, and the spout according to any one of claims 1 to 5 is sealed in the opening of the container main body by attaching the attachment portion of the spout. It is a container with a spout characterized by being mounted integrally.

According to the present invention, the multilayer diaphragm made of a functional resin is integrally provided at the position where the spout portion of the spout portion is prevented, so that the top surface of the spout opening need not be blocked with a sealing material having a barrier property. In addition, oxygen can be prevented from entering from the opening of the spout, and the spout on the container body side below the multilayer diaphragm is gas-blocked, so that oxygen can be prevented from entering from the outer peripheral surface of the spout cylinder. Even if the gas barrier property of the entire spout can be prevented effectively, a spout having an excellent gas barrier property to the container can be obtained.
According to the second aspect of the present invention, in addition to the above-described effect, by providing the multilayer diaphragm so as to be positioned in a seal portion with the container body, gas can be blocked from the multilayer diaphragm to a position reaching the attachment portion. Therefore, the gas barrier property of the container body is effectively used to cut off the spout gas, and the configuration can be simplified.
According to the invention of claim 3, in addition to the effect of the invention of claim 1, a multi-layered cylindrical sleeve having a functional resin tank as an intermediate layer is provided at the outlet of the container body from the multilayer diaphragm. In order to cut off the gas from the multilayer diaphragm to the position reaching the mounting part, there is an advantage that the position of the multilayer diaphragm is not restricted.
Furthermore, according to the invention of claim 4, the multilayered diaphragm is formed as a multilayered bottomed cylindrical body having a bottom portion, and the multilayered cylindrical body portion of the multilayered bottomed cylindrical body is within the seal portion with the container body. Since the gas barrier between the multilayer diaphragm and the position reaching the mounting portion is intended to be cut off, the thin film portion and the cylindrical portion are completely continuous with the gas barrier functional resin. Since it is covered, a higher level of gas barrier properties can be secured.
Furthermore, according to the invention according to claim 5, in the spout according to claims 1 to 4, since the easy-opening portion is provided on the bottom surface of the multilayer bottomed cylindrical body, the thickness of the multilayer bottomed cylindrical body is Even if the thickness is increased, it can be easily broken at the time of opening, and easy opening can be secured.

  In addition, according to the invention of claim 6, since the spout having excellent gas barrier property is attached to the container body formed of the gas barrier material and integrated, the gas barrier property is excellent and the high oxygen barrier property is high. A container such as a pouch with a spout suitable for filling the required contents can be obtained.

Hereinafter, a spout according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a basic embodiment of a spout according to the present invention and a pouch container in which the spout is integrally mounted.
The spout 1 of the present embodiment includes a cylindrical spout portion 2 and a mounting portion 3 provided so as to protrude from the outer peripheral surface at a position below the spout portion, and the mounting portion 3 is shown in FIG. It is inserted and sealed in the opening seal part 11 of the container main body 10 indicated by a virtual line. The container body 10 is a pouch formed of a material having gas barrier properties, such as conventionally known nylon, ethylene vinyl alcohol, polyvinylidene chloride, polyethylene naphthalate, polyacrylonitrile, metal vapor deposition film, metal foil such as aluminum, etc. It can be formed of various materials having a gas barrier property such as a laminate film including a material having a high gas barrier property in a layer structure.

  And the multilayer film 6 which the intermediate | middle layer 5 consists of functional resin is integrally formed so that the spout 4 may be plugged in the middle of the spout 4 of the spout 2. As the functional resin, a gas barrier resin or an oxygen-absorbing resin can be adopted, and as the gas barrier resin, nylon, ethylene vinyl alcohol, polyvinylidene chloride, polyethylene naphthalate, polyacrylonitrile, etc. are adopted. it can. Examples of the oxygen-absorbing resin include iron powder, metal halides such as sodium chloride, calcium chloride, magnesium chloride, sodium bromide, potassium bromide, sodium iodide, calcium iodide, barium chloride, and iron powder. Or a thermoplastic synthetic resin blended with a material having oxygen absorbability such as a mixture of the above and a mixture of the above mixture and diatomaceous earth. The base material other than the functional resin constituting the spout is made of a single polyolefin resin such as polyethylene or polypropylene. The multilayer diaphragm 6 including the intermediate layer 5 is integrally formed and integrated with other parts of the spout as will be described later.

  It is important that the intermediate layer 5 of the multilayer diaphragm 6 has a diameter that is at least larger than the inner diameter of the spout, as shown in the drawing, and is arranged so as to bite into the spout 2. It is an important condition that the diaphragm 6 is located in the opening seal portion 11 of the container body 10 as shown in FIG. In addition, in order to prevent gas from entering the spout from the peripheral edge of the intermediate layer 5, the multilayer diaphragm 6 has a thick portion of the spout portion located in the same manner in other embodiments described later. It is desirable to provide at a position where the mounting flange 7 of the mounting portion extends.

  In this embodiment, by positioning the multilayer diaphragm 6 in the opening seal part 11 as described above, at least the outer peripheral surface of the spout part below the multilayer diaphragm 6 is covered with a pouch-constituting film having gas barrier properties. Thus, it is possible to prevent gas such as oxygen from entering the spout outlet of the spout from the outer peripheral surface of the outlet part below the multilayer diaphragm 6, and the attachment part 3 serving as a seal part with the container body from the multilayer diaphragm 6. The gas shut-off up to the position that reaches is achieved.

FIG. 2 shows a spout according to another embodiment of the present invention. In the following embodiments, the same components as those of the embodiment shown in FIG. explain.
The spout 15 of the embodiment shown in FIG. 2 has the same basic configuration as that of the embodiment shown in FIG. 1, but in this embodiment, the spout 15 is formed on the inner peripheral surface of the spout at a position above the multilayer diaphragm 6 of the spout 2. A screw 16 is formed. In this way, by forming an internal thread on the inner peripheral surface of the spout part, for example, the connection needle provided on the catheter and the spout are screwed together as in the example described in JP-A-2002-210023. And can be connected.

FIG. 3 is a cross-sectional view of a spout according to still another embodiment of the present invention.
The spout 20 of the present embodiment is provided at a position where the multi-layer diaphragm 6 provided in the spout part 2 is provided with an engagement flange 8 positioned above the opening seal part 11 of the container. A multi-layer cylindrical sleeve 21 extending at least to a position reaching the opening seal portion 11 of the container is integrally provided at the spout portion below the multi-layer diaphragm 6. In the multilayer cylindrical sleeve 21, the intermediate layer 22 is made of a functional resin in the same manner as the multilayer diaphragm. The functional resin can be the same as that of the multilayer diaphragm. Thus, in the present embodiment, by providing the multi-layered cylindrical sleeve 21 having the functional resin layer as the intermediate layer 22 at the outlet portion on the container body side from the multilayer diaphragm 6 so as to extend into the seal portion with the container body. The gas is blocked from the multilayer diaphragm 6 to the position reaching the mounting portion. Therefore, in the case of this embodiment, even if the multilayer diaphragm 6 is located above the opening seal portion, the path from the inside of the container to the multilayer diaphragm has a gas barrier property as long as the multilayer diaphragm is not broken. In addition, it is possible to prevent oxygen from entering the container and prevent oxidative deterioration of the contents. As shown in the figure, in order to prevent gas from entering from a discontinuous portion between the intermediate layer 5 of the multilayer diaphragm and the upper end of the intermediate layer 22 of the multilayer cylindrical sleeve 21, the discontinuous portion is formed on the outlet portion. It is desirable to be located where it is thick.

  FIG. 4 is a cross-sectional view of a spout 25 according to still another embodiment of the present invention, in which an internal screw 16 is formed on the inner peripheral surface of the spout portion 2 in the upper position from the multilayer diaphragm 6 in the embodiment shown in FIG. Has been. Thereby, a catheter etc. can be screwed and connected to a spout part similarly to embodiment shown in FIG.

FIG. 5 is a cross-sectional view of a spout according to still another embodiment of the present invention.
In the spout 30 of the present embodiment, the multi-layered bottomed cylindrical body 31 is formed integrally with the multi-layered diaphragm corresponding to the multi-layered tubular sleeve 21 of the above-described embodiment. As shown in the drawing, the bottom 32 corresponds to the multilayer diaphragm of the above embodiment, shields the spout 4 in the middle, and the cylindrical portion 33 is mounted integrally with the inner peripheral wall surface of the spout. As for this multilayer bottomed cylindrical body 31, the intermediate | middle layer 34 is formed with the functional resin similarly to the said embodiment.

  Therefore, in this embodiment, the multilayer diaphragm is formed as a multilayer bottomed cylindrical body having a bottom portion 32, and the multilayer cylindrical portion of the multilayer bottomed cylindrical body is provided to extend into the seal portion with the container body. Thus, the gas is blocked from the multilayer diaphragm (bottom portion 32) to the position reaching the opening seal portion 11. Thus, in this embodiment, since the intermediate layer of the bottom part which is a multilayer diaphragm and the cylinder part which is a multilayer cylindrical body part is formed continuously, the multilayer diaphragm 6 like embodiment shown in FIG. Since there is no discontinuous part of the intermediate layer between the multi-layered cylindrical sleeve 21, it is not necessary to provide the position of the multi-layer diaphragm particularly in the thick part of the spout part, and even if it is provided at an arbitrary position, it has a high gas barrier property. Can be achieved.

  FIG. 6 is a cross-sectional view of a spout according to still another embodiment of the present invention. An internal thread 16 is formed on the inner peripheral surface of the multilayer bottomed cylindrical body 31 in the embodiment shown in FIG. In the present embodiment, an easy-open portion is provided by forming a score 41 that does not reach the intermediate layer 34 on the upper surface of the bottom portion 32. Thereby, the connecting needle of the catheter can be easily broken at the bottom.

As mentioned above, although various embodiment of the spout concerning this invention was shown, this invention is not limited to these embodiment, A various design change is possible within the range of the technical idea. For example, the multilayer diaphragm, the multilayer cylindrical body, and the multilayer bottomed cylindrical body show a case where the intermediate layer is one layer, but of course, the intermediate layer may be two or more layers. Further, the intermediate layer can be appropriately selected depending on the application, such as a combination of a layer having a gas barrier property and a layer having an oxygen absorbing property. In the embodiment shown in FIG. 6, the easy-opening portion is formed by forming the score 41 on the bottom portion 32 that becomes the multilayer partition wall. However, as in the embodiment shown in FIGS. By making the vicinity of the surface thin, an easy-opening portion can be formed, and conversely, in the embodiment of FIGS. The easy-opening portion may be formed by forming a score.
The spout of the present invention has the above-described configuration, can achieve gas shut-off of the spout, and can be integrally injection-molded by the method exemplified below, and is excellent in productivity.

FIG. 7 is a process diagram showing an example of the spout manufacturing method of the embodiment shown in FIG. Based on this process drawing, the manufacturing method of the spout 20 will be described in detail.
First, in the steps (a) to (b), the lower mold 50 has a core mold 52 having a nozzle 51 at the center, and a multi-layered cylindrical sleeve 21 that is separately molded is inserted into the outer peripheral surface of the core mold 52. To do. The multilayer cylindrical sleeve 21 is formed of a double layer having an inner layer formed of a polyolefin resin that is a main resin of the spout body and having a functional resin layer as an outer layer.

  In step (c), the cavity mold 55 which is the upper mold is lowered, and the upper core mold 56 is also lowered, and the cavity 57 is formed by closing the mold. In this state, the molten resin is injected from the nozzle 51 and injection molded. In this embodiment, the diaphragm portion that closes the spout is composed of an olefin-based layer, which is a basic material for forming a spout, and a functional resin layer. Since the resin injected from the nozzle 51 is formed in a multilayer structure, the olefin-based resin 58 is injected and the attachment part and the spout part excluding the diaphragm part are molded until a part other than the diaphragm part is formed. At the stage of forming the diaphragm portion, as shown in FIGS. 4D to 4F, the functional resin 59 is injected into the resin extruded from the nozzle, and is injected from the nozzle. The part is formed as a multilayer diaphragm in which a functional resin layer is present inside the olefin resin layer. The functional molten resin mass is present inside the olefin-based molten resin by adopting a co-injection molding method that is used when forming a multilayer composite resin film by supplying different molten resins from a so-called multiple die. Can be achieved. Then, as shown in FIG. 3G, the mold is opened and finally the upper core mold 56 is removed to obtain the spout 20 shown in FIG.

  As described above, the spout 20 according to the present embodiment is easily and integrally formed by a combination of the insert molding method in which the multilayer cylindrical sleeve is positioned on the inner periphery of the spout and the co-injection molding method in which the multilayer diaphragm is formed. can do. Similarly, the spout 25 shown in FIG. 4 can be easily molded by a combination of an insert molding method and a co-injection molding method for forming a multilayer diaphragm portion. In addition, since the spouts 1 and 15 shown in FIGS. 1 and 2 have only the diaphragm as the multilayer part, only the diaphragm part can be easily integrally formed by adopting the co-injection molding method.

FIG. 8 shows an embodiment of a method for forming the spout 30 of the embodiment shown in FIG.
In this case, the lower die 70 has a nozzle insertion opening into which the core die 71 and the nozzle 76 are inserted at the center, and is separately molded on the outer peripheral surface of the core die 71 as shown in FIGS. The multilayer cylindrical bottomed cylindrical body 31 is inserted. As described in the embodiment shown in FIG. 5, the multilayer cylindrical bottomed cylindrical body 31 is a multilayer cylindrical bottomed cylindrical body in which the bottom portion 32 and the cylindrical portion 33 are integrated. An intermediate layer 34 made of a functional resin layer extending continuously from the bottom is disposed. Next, as shown in FIGS. 3C and 3D, an arc-shaped score forming blade 73 for forming an arc-shaped score is formed on the bottom top surface of the multi-layer cylindrical bottomed cylindrical body 31 so as to protrude. An arc-shaped score 41 is formed on the bottom top surface of the multi-layer cylindrical bottomed cylindrical body 31 by the score mold 72.

  Next, in step (f), the cavity mold 74 and the upper core mold 75 are lowered to perform mold clamping, a cavity is formed between the lower mold 70, and a thermoplastic resin is injected into the cavity from the nozzle 76. As shown in FIG. 5G, the cylindrical portion and the attachment portion are formed integrally with the multi-layer cylindrical bottomed cylindrical body 31, and the spout 30 shown in FIG. 5 is injection-molded. Therefore, in that case, only one kind of resin such as an olefin resin may be injected from the nozzle 76, and only by insert molding in which the multi-layered cylindrical bottomed cylindrical body 31 is previously mounted on the lower core mold and is functional. An excellent spout can be obtained. In addition, when shape | molding the spout 40 of embodiment shown in FIG. 6, in the method shown in FIG. 8, it has the type | mold surface by which the thread for forming an internal thread was protruded and formed in the outer peripheral surface of the upper core type | mold 75. If the upper core mold is adopted, it can be molded by the same method. In that case, when the upper core mold is cut, the upper core mold can be cut by rotating it in the unscrewing direction.

  Since the spout of the present invention and the container equipped with the spout have functionalities such as gas barrier properties and oxygen absorption properties, enteral nutrients, infusions, and oral drug solutions that require high gas barrier properties It can be suitably used for containers filled with contents such as blood and food.

It is front sectional drawing of the spout which concerns on embodiment of this invention. It is front sectional drawing of the spout which concerns on other embodiment of this invention. It is front sectional drawing of the spout which concerns on other embodiment of this invention. It is front sectional drawing of the spout which concerns on other embodiment of this invention. It is front sectional drawing of the spout which concerns on other embodiment of this invention. It is front sectional drawing of the spout which concerns on other embodiment of this invention. It is process drawing which shows the manufacturing process of the spout which concerns on embodiment shown in FIG. It is process drawing which shows the manufacturing process of the spout which concerns on embodiment shown in FIG.

Explanation of symbols

1, 15, 20, 25, 30, 40 Spout 2 Spout port 3 Mounting portion 4 Spout port 5, 22, 34 Intermediate layer 6 Multilayer diaphragm 7 Mounting flange 8 Engaging flange 10 Container body 11 Opening seal portion 16 Internal screw 21 Multi-layer cylindrical sleeve 31 Multi-layer bottomed cylindrical body 32 Bottom 33 Tube 41 Score 50, 70 Lower mold 51, 76 Nozzle 52, 71 Core mold 55, 74 Cavity mold 56, 75 Upper core 58 Olefin resin 59 Functionality Resin 72 score type

Claims (6)

  A spout having a cylindrical spout part and a mounting part attached to the opening part of the container body, wherein a multilayer diaphragm made of a functional resin is integrally provided at a position closing the spout of the spout part. A spout is provided with gas blocking means for blocking gas from the multilayer diaphragm to a position reaching the mounting portion.   The spout according to claim 1, wherein the gas blocking means from the multilayer diaphragm to a position reaching the mounting portion is provided so that the multilayer diaphragm is located in a seal portion with the container body.   The gas shut-off means from the multilayer diaphragm to the position reaching the mounting portion is a seal between the container body and a multilayer cylindrical sleeve having a functional resin layer as an intermediate layer on the outlet side of the container body from the multilayer diaphragm. The spout according to claim 1, wherein the spout is provided so as to extend into the portion.   The gas blocking means from the multilayer diaphragm to the position reaching the mounting portion forms a multilayer bottomed cylindrical body whose intermediate layer is made of functional resin, and closes the spout at the bottom of the multilayer bottomed cylindrical body. The spout according to claim 1, wherein the spout is formed so as to form the multi-layered diaphragm, and the cylindrical part forms an inner peripheral surface of the spout part and extends into a seal part with the container body.   The spout according to any one of claims 1 to 4, wherein an easy-opening portion is provided in the multilayer diaphragm.   A container main body is formed of a gas barrier material, and the spout according to any one of claims 1 to 5 is integrally attached to an opening of the container main body by sealing an attachment portion of the spout. A spouted container.

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