JP2008087786A - Spout with gas-barrier property, manufacturing method for the spout, and spouted container provided with the spout - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spout excellent not only in gas-barrier properties for preventing the intrusion of oxygen into a container but also in productivity. <P>SOLUTION: In this spout 1, a diaphragm 6 for closing a pour-out port is provided in a pour-out cylinder portion 2; a multilayer cylinder-like sleeve 8 with a functional resin layer 9 is provided on the inner peripheral surface of the pour-out cylinder portion; and a lower end of the diaphragm 6 and that of the sleeve 8 are located in a position to serve as a portion 16 for being sealed to a container body 15. The spout 1 is heat-sealed to an opening of the container body 15. The spout 1 is injection-molded through the following steps: the sleeve 8 with the functional resin layer is separately formed, and mounted in an upper core mold, and positioned in a cavity which is formed of a female mold and cavity mold, so that its lower end can reach a cavity position to form a mounting portion serving as the portion being sealed to the container body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a spout attached to a container body such as a pouch, and a spout having a diaphragm in the middle of a spout, particularly a container having a gas barrier property that contains contents that are easily denatured by oxygen, such as infusion and enteral nutrient The present invention relates to a spout having a gas barrier property that is attached to the opening, a manufacturing method thereof, and a spout-equipped container equipped with the spout.

  Conventionally, containers such as pouches for storing contents that are easily altered by oxygen such as blood, food, etc. for oral medicine such as infusions, enteral nutrients, liquid foods, etc. The gas barrier property of the container main body was ensured because the container main body was composed of, etc., but the spout attached to the container main body is usually formed of a single polyolefin resin and the gas barrier property is sufficient compared to the container main body Not. Therefore, in order to prevent oxygen from entering the spout part and prevent the contents from being completely altered, and to ensure a more complete gas barrier property, the container is inserted into an outer bag made of a material having a higher gas barrier property. There was a problem that it had to be sealed and packaged. In order to solve the problem, as a means to increase the gas barrier property of the spout, the dispensing is performed by providing an intermediate layer made of a gas barrier resin from the portion protruding from the sealing portion of at least the container to the upper cylindrical portion. Proposals have been made in which oxygen is prevented from entering into the container through the wall surface of the cylinder part and the upper end of the extraction cylinder part is sealed with a gas barrier film or a rubber plug (see Patent Documents 1 and 2).

On the other hand, enteral nutrients, infusions, etc. are generally administered to the human body through a catheter. Therefore, when the contents are to be poured out from the container, an injection needle or connecting needle provided at the proximal end of the catheter is used as a spout tube. The part is fitted. Therefore, the spout tube portion of the spout is required to have a certain length or more so that the syringe and the connecting needle can be stably fitted and held, and it is required that a perfect seal be maintained until use. In order to satisfy the above requirement, there has been proposed one in which an easily breakable partition wall is provided integrally with the extraction cylinder part in the middle of the extraction cylinder part having a predetermined length (for example, see Patent Document 3). By providing an easily breakable partition wall in the middle of the dispensing cylinder part, there is an advantage that the diaphragm can be stably and safely broken with a syringe or a connecting needle and the sealing performance is further improved.
Japanese Patent Laid-Open No. 11-128317 JP-A-11-29159 Japanese Patent Laid-Open No. 2002-210023

Conventionally, it is known as described above that a gas barrier layer is interposed on the cylinder wall of the extraction cylinder part to prevent air from entering from the extraction cylinder part. The sealing material is provided at the upper end or the lower end of the portion, and is not applied to the case in which a partition wall (or thin film) is integrally provided in the middle of the dispensing cylinder portion. In the case of a spout in which a partition wall is integrally formed in the middle of the spout, it is difficult to form a gas barrier layer at least over the upper and lower portions of the partition wall, and such a spout has not been proposed.
Therefore, the present invention is a spout having an easily breakable partition wall that closes the spout in the middle of the spout cylinder, and is excellent in gas barrier properties to prevent oxygen from entering the container through the spout pipe wall of the spout, An object of the present invention is to provide a spout having excellent productivity and having a gas barrier property capable of stably connecting an extraction member of a catheter, a method for producing the spout, and a spout-equipped container equipped with the spout. .

The spout according to claim 1 of the present invention for solving the above-mentioned problem is a spout having a pouring tube portion and an attachment portion attached to the opening seal portion of the container body, and closes the pouring port in the pouring tube portion. A multi-layered cylindrical sleeve having a diaphragm and having a functional resin layer on the inner peripheral surface of the dispensing cylindrical portion, and a position where the lower end of the diaphragm and the multilayered cylindrical sleeve serves as a seal portion with the container body It is characterized in that it is located in
In the present invention, 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 diaphragm is a multilayer thin film having a functional resin layer as an intermediate layer.
Furthermore, the invention according to claim 3 is the spout according to claim 1 or 2, wherein the lower end of the multilayer cylindrical sleeve is deformed outward.

The spout of the invention according to claim 4 is a spout having a dispensing cylinder part and an attachment part attached to the opening seal part of the container body, and has a diaphragm for closing the dispensing outlet in the dispensing cylinder part, An upper multi-layer cylindrical sleeve and a lower multi-layer cylindrical sleeve having a functional resin layer are provided on the inner peripheral surface of the dispensing cylindrical portion so as to be positioned above and below the diaphragm, and a lower end portion of the lower multi-layer cylindrical sleeve is provided The container body is positioned at a position to be a seal portion.
According to a fifth aspect of the present invention, in the spout according to the fourth aspect, the thin film is formed so as to be positioned substantially on the same plane as a flange portion that protrudes from the outer periphery of the extraction tube portion. To do.
Further, the spout of the invention according to claim 6 is a spout having a dispensing cylinder part and an attachment part attached to the opening seal part of the container body, and a functional resin layer on the inner peripheral surface of the dispensing cylinder part. A multi-layered cylindrical sleeve is provided, a diaphragm for closing the spout is provided in the multi-layered cylindrical sleeve, and a lower end portion of the lower multi-layered cylindrical sleeve is positioned at a position to be a seal portion of the container body. It is characterized by.

  According to a seventh aspect of the present invention, there is provided a spout manufacturing method comprising: a multi-layered cylindrical sleeve having a diaphragm for closing a spout in a pour cylinder, and having a functional resin layer on an inner peripheral surface of the pour pipe. A spout manufacturing method comprising: forming a multilayer cylindrical sleeve having the functional resin layer; and mounting the multilayer cylindrical sleeve on an upper core mold in a cavity formed by a lower mold and a cavity mold. A step of clamping together with the upper core mold, a step of injecting molten resin into the cavity, and a lower end portion of the multilayer cylindrical sleeve in the mold clamping step; It is characterized by being positioned so as to reach the cavity position where the mounting portion is formed.

  The spout manufacturing method of the invention according to claim 8 has a diaphragm that closes the spout in the pour cylinder part, and a functional resin on the inner peripheral surface of the pour pipe part so as to be positioned above and below the diaphragm. A method of manufacturing a spout comprising an upper multilayer cylindrical sleeve having a layer and a lower multilayer cylindrical sleeve, the step of forming the upper multilayer cylindrical sleeve and the lower multilayer cylindrical sleeve having the functional resin layer, The upper multilayer cylindrical sleeve is mounted on the upper core mold, the lower multilayer cylindrical sleeve is mounted on the lower core mold, and the upper multilayer cylindrical sleeve and the lower mold are formed in a cavity formed by the lower mold and the cavity mold. A step of positioning and clamping the multilayer cylindrical sleeve; and a step of injecting molten resin into the cavity; and in the clamping step, into the cavities of the upper multilayer cylindrical sleeve and the lower multilayer cylindrical sleeve. The position of the upper multilayer The lower end of the cylindrical sleeve and the upper end of the lower multi-layer cylindrical sleeve are positioned so as to reach the position where the diaphragm is formed, and the lower end of the lower multi-layer cylindrical sleeve is installed as a seal portion with the container body It is characterized by being positioned so as to reach the position of the cavity forming the part.

In the spout manufacturing method of the invention according to claim 9, a multi-layered cylindrical sleeve having a functional resin layer is provided on the inner peripheral surface of the pour-out cylindrical portion, and a diaphragm for closing the spout is provided in the multi-layered cylindrical sleeve. A method for producing a spout comprising: a step of forming a multilayer cylindrical sleeve having the functional resin layer; a step of forming a diaphragm on the multilayer cylindrical sleeve to form a multilayer cylindrical sleeve with a diaphragm; A step of clamping the mold by attaching a multilayer cylindrical sleeve to the upper core mold and positioning it in the cavity formed by the lower mold and the cavity mold, and a step of injecting a molten resin into the cavity. In the process, the lower end portion of the multilayered cylindrical sleeve with a diaphragm is positioned so as to reach a cavity position that forms an attachment portion that becomes a seal portion with the container body.
According to a tenth aspect of the present invention, in the method of manufacturing a spout according to the ninth aspect, the step of forming the multi-layered cylindrical sleeve with a diaphragm is a step of forming a multi-layered cylindrical sleeve having a functional resin layer. The cylindrical sleeve is fitted into a lower core mold for forming a multilayer cylindrical sleeve with a diaphragm having a height shorter than the axial length of the multilayer cylindrical sleeve, and the upper end surface of the lower core mold for forming the multilayer cylindrical sleeve is The method includes a step of forming a cavity with the protruding inner layer surface of the multilayer cylindrical sleeve and the upper core mold, and injecting a molten resin into the cavity.

  A container with a spout according to an eleventh aspect of the present invention is such that a container body is formed of a gas barrier material, and the spout according to any one of claims 1 to 6 is sealed at an opening seal portion of the container body. By doing so, it is characterized by being mounted integrally.

  According to the spout of Claims 1-3, a multi-layered cylindrical sleeve having a diaphragm for closing the spout in the pour cylinder, and having a functional resin layer on the inner peripheral surface of the pour cylinder is provided. Since the lower end portion of the multilayer cylindrical sleeve is positioned at a position to be a seal portion with the container body, even if the spout has a diaphragm in the extraction cylinder portion, the extraction cylinder portion above the diaphragm Oxygen can be prevented from entering the container through the wall, and the upper end surface of the dispensing cylinder can be blocked with a gas barrier seal, so that oxygen can be reliably prevented from entering through the spout. It can be applied to containers such as pouches that require high gas barrier properties. Further, according to the invention of claim 2, it is possible to reliably prevent oxygen from entering the container through the spout without sealing the top end surface of the spout cylinder with a gas barrier seal. Furthermore, according to the third aspect, by deforming the lower end of the multilayer cylindrical sleeve outwardly, the gas blocking area in the width direction at the lower end of the multilayer cylindrical sleeve is increased, and the oxygen blocking effect is further improved.

  According to invention of Claim 4, it has a diaphragm which plugs a spout in a pouring cylinder part, and has a functional resin layer on the inner peripheral surface of the pouring cylinder part so that it may be located above and below the diaphragm. Since the multi-layered cylindrical sleeve and the lower multi-layered cylindrical sleeve are provided, and the lower multi-layered cylindrical sleeve is positioned at a position to be a seal portion with the container body, the spout has a diaphragm in the dispensing cylindrical portion. However, it is possible to highly prevent oxygen from entering the container through the wall of the extraction cylinder part, and by blocking the upper end surface of the extraction cylinder part with a gas barrier seal, Invasion of oxygen into all containers can be reliably and easily prevented, and can be applied to containers such as pouches that require a high degree of gas barrier properties. According to the structure of claim 5, since the circumferential thickness of the portion where the diaphragm is located is increased, oxygen from the portion where the upper multilayer cylindrical sleeve and the lower multilayer cylindrical sleeve are discontinuous is obtained. Intrusion can be effectively prevented.

  According to the invention of claim 6, a multi-layered cylindrical sleeve having a functional resin layer as an intermediate layer is provided on the inner peripheral surface of the pour-out cylindrical portion, a diaphragm for closing the spout is provided in the multi-layered cylindrical sleeve, and Since the lower end portion of the multilayer cylindrical sleeve is positioned at a position to be a seal portion of the container body, a multilayer cylindrical sleeve having a functional resin is disposed over substantially the entire circumference of the axial cylindrical portion of the dispensing cylindrical portion. This makes it possible to more completely block the intrusion of oxygen from the dispensing cylinder part.

According to the manufacturing method of the invention of claim 7, a multilayered cylindrical sleeve is formed in advance, and it is reliably formed at a position where the diaphragm and the lower end portion of the multilayered cylindrical sleeve serve as a seal portion with the container body by insert molding. Therefore, the spout according to claims 1 and 2 can be produced on an actual production line.
Similarly, according to the manufacturing method of claim 8, the upper multilayer cylindrical sleeve and the lower multilayer cylindrical sleeve are pre-formed, and the positions of the upper multilayer cylindrical sleeve and the lower multilayer cylindrical sleeve in the cavity are The lower end of the upper multi-layer cylindrical sleeve and the upper end of the lower multi-layer cylindrical sleeve are positioned so as to reach the position where the diaphragm is formed, and the lower end of the lower multi-layer cylindrical sleeve is sealed with the container body of the container Since the insert molding can be performed by positioning so as to reach the inside of the mounting portion forming cavity, it is possible to produce the spout according to claims 4 and 5 on an actual production line.

  According to the ninth and tenth aspects of the present invention, a multilayer cylindrical sleeve is formed, and a diaphragm for closing the spout is formed inside the multilayer cylindrical sleeve to form a multilayer cylindrical sleeve with a diaphragm in advance, 7 can be formed integrally with the spout body by insert molding, so that a diaphragm can be formed in a cylinder in a multilayer cylindrical sleeve having a functional resin layer. Can be produced on an actual production line.

  According to the eleventh aspect of the present invention, the container body formed of the gas barrier material is equipped with a spout having an excellent gas barrier property, and is integrated with a gas barrier so that the high oxygen barrier property is required. A container such as a pouch with a spout suitable for filling a product 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.
The spout 1 of the present embodiment includes a cylindrical extraction tube portion 2 and an attachment portion 3 provided so as to protrude from the outer peripheral surface of the lower portion of the extraction tube portion, and the attachment portion 3 is shown in FIG. It is inserted and sealed in the opening seal portion 16 of the container body 15 shown. In the present embodiment, the dispensing cylinder part 2 and the attachment part 3 (hereinafter referred to as the spout body together) are made of a single polyolefin-based resin such as polyethylene or polypropylene (except for a multilayer cylindrical sleeve described later). Hereinafter, it is composed of a spout base material). On the other hand, the container body 15 is a pouch formed of a gas barrier material, and conventionally known, for example, 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.

The Note spout 4 leaving tube portion 2, the diaphragm 6 is provided so as to close the spout 4 in the middle, it is partitioned into the spout 4 ₂ of spout 4 ₁ and lower above the diaphragm. In the present embodiment, the diaphragm 6 is arranged in a positional relationship such that when the spout is mounted on a container body such as a pouch, as shown in FIG. 1, the diaphragm 6 is positioned in the opening seal portion 16 of the container body. The diaphragm 6 is formed as a thin film as a whole so that it can be easily broken and opened when the contents are poured out, or a weakened portion 7 is formed so as to be easily broken leaving a part of its peripheral part. It is formed by injection molding with a spout base material by a method described later. And in this embodiment, the multilayer cylindrical sleeve 8 which an intermediate | middle layer consists of functional resin is integrally formed in the internal peripheral surface of the extraction cylinder part above the diaphragm 6. As shown in FIG.

In the present embodiment, the multilayer cylindrical sleeve 8 has an outer layer formed of a functional resin layer 9 and an inner layer 10 formed of a single polyolefin resin as in the spout base material. The multilayer cylindrical sleeve 8 only needs to include the functional resin layer 9 in its layer structure, and the position and the number of layers are not particularly limited, but the functional resin layer is in direct contact with the content liquid or the content. Since it is not desirable, it is desirable to provide a resin other than the functional resin layer 9, for example, a polyolefin resin layer, in the innermost layer that may come into contact with the contents at the time of pouring.
In this embodiment, the multilayer cylindrical sleeve is composed of two layers of a polyolefin resin single layer and a functional resin layer, but three layers in which a polyolefin resin single layer is further formed outside the functional resin layer. Alternatively, a multilayer structure in which functional resin layers and spout base materials are alternately laminated may be used, and an optimum structure can be adopted depending on the application. In addition, the outer layer is formed by spout molding as described later, and when insert molding is performed, the surface of the outer layer is covered and integrated with the spout base material, so the outer layer may be a functional resin layer when molding the multilayer cylindrical sleeve. Further, it may be a single layer of polyolefin resin.
As the functional resin, a gas barrier resin or an oxygen-absorbing resin can be used. As the gas barrier resin, nylon, ethylene vinyl alcohol, polyvinylidene chloride, polyethylene naphthalate, polyacrylonitrile, etc. are used. 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.

  In the present embodiment, as shown in FIG. 1, the upper end of the multilayer cylindrical sleeve is configured to be covered with a spout base material so that the end surface of the functional resin layer 9 is not directly exposed to the spout end surface. As described above, the functional resin layer is completely embedded in the spout base so that the functional resin layer is not directly exposed to the outside, thereby preventing the functional resin from deteriorating due to water absorption or oxidation. So desirable. However, as shown in FIG. 4 to be described later, for example, the upper end of the functional resin layer is not directly contacted with the contents by the diaphragm even if the functional resin layer is directly exposed to the outside. It may be formed.

As shown in FIG. 2, the sealing material 17 made of a gas barrier film is heat-sealed at the opening end 11 of the spout 4 of the spout 1 configured as described above to seal the opening end of the spout. To do. The spout 1 obtained as described above, as shown in FIG. 2, the container body (e.g., pouch) from 15 septum opening seal portion 16 of the lower spout 4 ₂ an opening seal portion of the full container body The container main body and the attachment part 3 are heat-sealed. Thereby, the spout 1 and the container main body are completely integrated, the container main body 15 is formed of a gas barrier material, and the spout-equipped container 20 having the functional spout 1 attached to the opening of the container main body is obtained. it can.

  In the spouted container 20 configured as described above, the axial circumferential surface of the spout 1 of the spout 1 is covered with the multilayered tubular sleeve 8 having a gas barrier property above the diaphragm 6 and below the diaphragm 6. Since it is covered with the opening seal portion 16 of the container main body having gas barrier properties, the invasion of gas (oxygen) from the spout peripheral portion can be highly prevented. Moreover, since the gas intrusion from the upper part of the spout is blocked by the sealing material 17, the intrusion of oxygen into the container through the spout is highly advanced while the spout has a diaphragm in the middle of the spout. Can be prevented. Therefore, the spout-equipped container 20 of the present embodiment can be suitably used as a container for storing contents that are easily altered by oxygen or the like, for example, an infusion solution or enteral nutrient.

FIG. 3 shows a spout 25 according to another embodiment obtained by improving the one shown in FIG. Parts similar to those shown in FIG. 1 are denoted by the same reference numerals, description thereof is omitted, and only differences are described. Hereinafter, the same applies to other embodiments.
Compared with the spout shown in FIG. 1, the spout 25 of the present embodiment is characterized in that a bent portion 27 is formed by bending and deforming the lower end of the multilayer cylindrical sleeve 26 outwardly in a flange shape. Thus, by forming the bent portion 27, as shown in FIG. 3 (a), a multi-layer cylinder is provided below the extraction tube portion, the attachment portion 3 extending outward from the extraction tube portion, and the corner portion 29. For example, as shown by the arrow 28, the gas entering from the corner portion 29 of the spout body toward the end of the multi-layered cylindrical sleeve can be completely shut off, so that a higher degree of oxygen blocking can be achieved. A spout having the property is obtained. The multilayer cylindrical sleeve 26 of the present embodiment is composed of three layers with the functional resin layer 9 sandwiched between the intermediate layers as shown in the figure, but the layer configuration is limited to that as in the above embodiment. is not.

FIG. 4 shows a spout 30 according to another embodiment in which the spout shown in FIG. 1 is further improved.
The spout of the present embodiment is characterized in that the intermediate layer 32 of the diaphragm 31 is a multilayer diaphragm formed of a functional resin layer similar to the multilayer cylindrical sleeve. Intermediate layer 32, as shown in FIG. 4, it is desirable that the outer peripheral portion is larger than Note the cross-sectional area of the outlet 4 ₁ so as to reach into the mounting portion.
Spout 30 of the present embodiment, with the structure described above, since the gas from the spout opening end of the spout invading through the spout 4 ₁ of the upper is cut off by the multi-layer diaphragm 31, FIG. 2 As shown in the above, even if the opening end of the spout is not sealed with a sealing material having a gas barrier property, it is possible to highly prevent oxygen from entering the container.

FIG. 5 is a cross-sectional view of a spout according to another embodiment of the present invention.
Spout 35 of the present embodiment, sandwiching the position diaphragm 6 is al provided which is provided in the middle of the pouring cylinder portion, the upper spout 4 ₁ of the inner peripheral surface and the lower side of the spout 4 ₂ each peripheral surface formed by arranging the upper multilayer tubular sleeve ₈₁ and the lower multilayer tubular sleeve _82. The said diaphragm 6 is arrange | positioned according to the position in which the flange 5 which is the thick part of the extraction | pouring cylinder part is provided. Thereby, even if the multi-ply cylindrical sleeve is not arranged in the pour cylinder part at the position where the diaphragm 6 is arranged, the intrusion of gas from the outer peripheral surface of the pour pipe part is prevented, and the barrier property is improved. Yes.
As described above, in the spout of the present embodiment, the dispensing cylinder portion is provided with the multilayer cylindrical sleeve on the inner peripheral surface except the position where the diaphragm 6 is provided, and the diaphragm is provided so as to coincide with the flange 5. Therefore, it is possible to prevent outside air from entering the spout from the spout cylinder. Then, by sticking a gas barrier sealing material to the opening end of the extraction cylinder part by heat sealing or the like, the oxygen entering through the opening part can also be prevented. A spout having excellent oxygen barrier properties can be obtained in the same manner as the spout in the form.

FIG. 6 is a cross-sectional view of a spout according to still another embodiment of the present invention.
The spout 40 of this embodiment is provided with a multilayer cylindrical sleeve 41 having a functional resin layer as an intermediate layer on the inner peripheral surface of the dispensing cylinder portion 2, and a diaphragm 42 for closing the spout in the multilayer cylindrical sleeve. It is a spout characterized by As shown in FIG. 6, the multi-layer cylindrical sleeve 41 is provided over almost the entire length of the dispensing cylinder portion 2, but extends at least to a position where the lower end portion 41-2 reaches the inside of the opening seal portion. It is necessary to provide as follows.
In the spout 40 of the present embodiment, since the diaphragm 42 is provided inside the multilayer cylindrical sleeve 41 of the dispensing cylinder portion, there is no discontinuity of the multilayer cylindrical sleeve at the position where the diaphragm is provided. In addition, it is possible to completely block the intrusion of oxygen from the outer peripheral surface of the extraction cylinder part, and the diaphragm 42 is not particularly required to be provided in the thick part of the extraction cylinder part, and is provided at an arbitrary position of the extraction cylinder part. However, there is an advantage of having a high oxygen barrier property.

  FIG. 7 is a cross-sectional view of a spout according to still another embodiment of the present invention. The spout 45 of this embodiment has the same basic configuration as that of the embodiment shown in FIG. An inner screw 46 is formed on the inner peripheral surface of the spout at a position above the diaphragm 42 of the outlet tube portion 2. In this way, by forming an internal thread on the inner peripheral surface of the dispensing tube portion, for example, as in the example described in JP-A-2002-210023, the connecting needle and spout provided on the catheter are screwed. Thus, the catheter can be connected more stably, and an accident in which the catheter is detached during use can be prevented.

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 cylindrical sleeve shows a case where the functional resin layer is one layer, but of course the functional resin layer may be two or more layers. In addition, the functional resin layer can be appropriately selected depending on the application, such as a combination of a gas barrier layer and an oxygen-absorbing layer. Moreover, in the said embodiment, in order to make a diaphragm easy to fracture | rupture, although the injection | throwing-in cylinder part inner peripheral surface vicinity of the diaphragm is formed thinly, you may form an easy-opening part 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. 8 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 said spout 1 is demonstrated in detail. In each of the following embodiments, for convenience of explanation, the parallel direction shown in the drawing is used as the top and bottom, and the mold is also shown as up and down according to the drawing. The mold may be closed and the mold opened.
First, a multilayer cylindrical sleeve 8 in which the inner layer 10 is formed of a single polyolefin-based resin similar to the spout substrate and the outer layer is a functional resin layer 9 is formed in a step (not shown), and the multilayer cylindrical sleeve 8 is formed. In steps (a) to (b), the upper core mold 50 is inserted into the outer peripheral surface. The upper core mold 50 has a small-diameter portion 52 from the large-diameter portion 51 through the step surface, the step surface becomes the pouring cylinder portion upper end molding surface 53, and the lower end surface of the small-diameter portion becomes the diaphragm molding surface 54. As shown in FIG. 2B, the multi-layered cylindrical sleeve is fitted on the outer peripheral surface of the small-diameter portion 52 so that the upper end thereof has a slight gap with the extraction cylindrical portion upper end molding surface 53.

  The lower die 55 has a lower core die 57 fitted with a nozzle 56 for injecting molten resin at the center, and the cavity die 60 as the upper die is lowered in the mold clamping step (c), and the multilayer cylindrical sleeve The upper core mold 50 in which 8 is inserted is also lowered and the mold is closed, and the cavity 61 is formed by the cavity mold 60, the upper core mold 50, the lower mold 55, the lower core mold 57, and the multilayer cylindrical sleeve 8. To do. In the mold clamping step, as shown in the figure, it is important to position the multilayer cylindrical sleeve 8 so that the lower end thereof reaches the cavity that forms the attachment portion that becomes the seal portion with the container body of the pouch. .

  When the molten resin is injected from the nozzle 56 in this state, as shown in FIG. 4D, the molten resin is filled into the cavity from the central position of the diaphragm part, and the diaphragm, the dispensing cylinder part, and the attachment part are Form. In the dispensing cylinder portion, the molten resin covers the lower end, outer peripheral surface, and upper end face of the multilayer cylindrical sleeve, and the multilayer cylindrical sleeve is integrated with the spout base material to form the spout. As described above, even when the spout has a diaphragm in the middle of the spout by performing insert molding with the multi-layered tubular sleeve fitted into the upper core mold, the multi-layered cylindrical sleeve is positioned in the spout tube portion. Can be integrally molded. And as shown in the figure (e), by opening a mold | type and finally removing the upper core type | mold 50, the spout 1 shown in FIG. 1 is obtained.

  As described above, the spout 1 of the present embodiment can be easily formed integrally by the insert molding method in which the multi-layered cylindrical sleeve is positioned on the inner peripheral portion of the spout so that the lower end thereof reaches the substantially diaphragm forming portion. it can. Similarly, the spout 30 shown in FIG. 4 can be easily molded by a combination of the insert molding method and the co-injection molding method for forming the multilayer diaphragm 31.

FIG. 9 shows an embodiment of a method for forming the spout 35 of the embodiment shown in FIG.
In this case, the upper multilayer tubular sleeve ₈₁ and the lower multilayer tubular sleeve ₈₂ advance separately molded, the upper multilayer tubular sleeve ₈₁ to the small diameter portion 52 of the embodiment similarly to the upper core die 50 shown in FIG. 8 fitting inserted interpolates fitting the lower multilayer tubular sleeve ₈₂ on the outer circumferential surface of the lower core die 57 as shown in step (b). The tip surface of the lower core mold 57 extends to the lower surface at a position to be a flange forming portion of a cavity mold, which will be described later, and the diaphragm molding surface 54 of the upper core mold 50 is formed to extend to the upper surface at a position to become a flange forming portion. molten resin upper surface of the upper core type fitted interpolated on the multilayer tubular sleeve ₈₁ of the lower end fitting on the lower core mold interpolated lower multilayer tubular sleeve ₈₂ is, that is injected into the cavity portion for molding the diaphragm Are respectively mounted so as to form a gap that can secure a resin flow path that allows passage through the dispensing cylinder part and the attachment part molding cavity part (FIGS. 5B to 5C).

A mold closing step (c), cavity 60 is an upper mold is lowered, and with the core mold 50 also descends on the multilayer tubular sleeve ₈₁ is fitted, by performing mold closing, cavity 60 , on the core mold 50, lower mold 55, the lower core die 57, the upper multilayer tubular sleeve ₈₁ and the lower multilayer tubular sleeve ₈₂ to form a cavity 61. In this state, when the molten resin is injected from the nozzle 56 and injection molded, the molten resin is injected into the cavity from the central position of the diaphragm portion as shown in FIG. , Forming the mounting portion. The pouring cylinder portion completely covers the outer peripheral surface thereof flowing molten resin along the outer circumferential surface of the upper multilayer tubular sleeve ₈₁ and the lower multilayer tubular sleeve _82, the upper multilayer tubular sleeve ₈₁ and the lower multilayer tube Jo sleeve 8 ₂ spout is molded integrally with the spout base. As described above, the upper multilayer tubular sleeve ₈₁ on the core mold, in a state in which the lower multilayer tubular sleeve 8 ₂ fitted on the lower core mold, the upper multilayer tubular sleeve of the lower end and the lower multilayer tubular sleeve upper end Is formed so that the lower end of the lower multi-layer cylindrical sleeve reaches a cavity that forms a mounting portion that serves as a seal portion with the container body of the pouch. By doing so, even if the spout has a diaphragm in the middle of the spout, it can be integrally formed by positioning the multi-layered cylindrical sleeve with the diaphragm section sandwiched between the dispensing cylinder section. Then, as shown in FIG. 5E, the mold is opened, and finally the upper core mold 50 is removed to obtain the spout 35 shown in FIG.

FIG. 10 shows an embodiment of a method for forming the spout 40 according to the embodiment shown in FIG.
The manufacturing process of the spout 40 includes a step of forming a multilayer cylindrical sleeve having a functional resin layer, a step of forming a diaphragm on the multilayer cylindrical sleeve to form a multilayer cylindrical sleeve with a diaphragm, and a multilayer cylindrical sleeve with a diaphragm. Is attached to the upper core mold and is positioned together with the upper core mold in the cavity formed by the lower mold and the cavity mold, and the lower end of the multi-layered cylindrical sleeve with a diaphragm serves as a seal portion with the container body of the pouch. The method includes the step of injection molding by being positioned so as to reach the mounting portion molding cavity, and the step of molding the multilayer cylindrical sleeve with a diaphragm forms a multilayer cylindrical sleeve having a functional resin layer in a layer other than the inner layer. Inserting the multi-layer cylindrical sleeve into a lower core mold for forming a multi-layer cylindrical sleeve with a diaphragm having a height shorter than the axial length of the multi-layer cylindrical sleeve; The upper end face of the A type, the inner layer surface of the multilayer tubular sleeve which projects from the upper end surface, and to form a cavity between the upper core mold, which is the step of injecting a molten resin into the cavity.

More specifically, in the illustrated embodiment, a multilayer cylindrical sleeve 41 having a functional resin layer as an outer layer and a polyolefin resin layer as an inner layer is formed in a separate process. Multilayer tubular sleeve 41 is formed in a length that extends to the upper spout 4 ₁ beyond the diaphragm from the bottom spout 4 ₂ as described above. The multilayer cylindrical sleeve can be easily molded by a coextrusion molding method or a co-injection molding method. Next, the multilayer cylindrical sleeve 41 is fitted into a lower core mold 70 for forming a multilayer cylindrical sleeve with a diaphragm having a nozzle 71 at the center. The upper end surface of the lower core mold 70 for forming a multilayer cylindrical sleeve is a diaphragm lower surface molding surface, and the upper portion of the multilayer cylindrical sleeve 41 in the state of being inserted into the lower core mold 70 is as shown in FIG. Further, the upper end surface 72 protrudes upward.

  In this state, the upper die 73 for forming the multilayered cylindrical sleeve with diaphragm is lowered to be fitted to the outer peripheral surface of the multilayered cylindrical sleeve 41, and the upper core die 75 for forming the multilayered cylindrical sleeve with diaphragm is further lowered. Then, it is fitted to the inner peripheral surface of the multilayer cylindrical sleeve 41. The upper core mold 75 has a cylindrical surface 76 formed with a diameter smaller than the inner diameter of the multilayer cylindrical sleeve, forms an annular interval with the inner peripheral surface of the multilayer cylindrical sleeve, and has a lower end surface thereof. 77 is formed with a space for forming a partition wall with the lower core mold to form a bottomed cylindrical cavity 78. Therefore, in this state, as shown in FIG. 4D, by injection molding, a multilayered cylindrical sleeve 79 with a diaphragm having a partition wall 42 on the inner surface of the multilayered cylindrical body is formed as shown in FIG. can do.

  Next, the upper core mold 75 is fitted into a cavity mold 80 which is a mold for forming a spout, as shown in FIG. In this embodiment, the spout mold 80 includes a lower mold 83 having a lower core mold 81 in the center and a nozzle 82 fitted in the vicinity of the outer periphery of the lower core mold, a cavity mold 84, and an upper core mold 75. It is configured. The upper core mold 75 is also used as the upper core mold of the multilayer cylindrical sleeve forming mold with a diaphragm for forming the multilayer cylindrical sleeve 79 with the diaphragm. As shown in FIG. 5 (f), the mold is clamped, molten resin is injected from the nozzle 82, and filled into the cavity, so that a multi-layered cylindrical sleeve with a diaphragm is integrally formed on the inner peripheral surface of the extraction cylinder portion. Spout 40 can be obtained.

  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. And the spout manufacturing method of this invention is applicable to the actual line which mass-produces the said spout.

(A) is front sectional drawing of the spout which concerns on embodiment of this invention, (b) is the AA sectional drawing. (A) is principal part front sectional drawing of the pouch container which concerns on embodiment of this invention, (b) is the BB sectional drawing. (A) is front sectional drawing of the spout concerning other embodiment of this invention, (b) is the CC sectional drawing. 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. It is process drawing which shows the manufacturing process of the spout which concerns on embodiment shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 25, 30, 35, 40, 45 Spout 2 Outgoing cylinder part 3 Mounting part 4 Outlet 5 Flange 6, 31, 42 Diaphragm 7 Weak part 8, 26, 41 Multilayer cylindrical sleeve 9 Functional resin layer 10 Inner layer DESCRIPTION OF SYMBOLS 11 Open end part 15 Container main body 16 Opening seal part 17 Sealing material 20 Container with spout 27 Bending part 32 Multilayer diaphragm 46 Inner screw 50 Upper core type 51 Large diameter part 52 Small diameter part 53 Outlet cylinder part upper end molding surface 54 Diaphragm molding Surface 55, 83 Lower mold 56, 71, 82 Nozzle 57, 81 Lower core mold 60, 84 Cavity mold 61, 78 Cavity 70 Core mold for molding a multilayer cylindrical sleeve with a diaphragm 73 Upper mold 75 for molding a multilayer cylindrical sleeve with a diaphragm Upper core mold for forming a multilayered cylindrical sleeve with a diaphragm 76 Cylindrical surface 79 Multilayered cylindrical sleeve with a diaphragm 80 Spout mold

Claims (11)

  A spout having a dispensing cylinder part and an attachment part attached to the opening seal part of the container body, and having a diaphragm for closing the dispensing outlet in the dispensing cylinder part, and functioning on the inner peripheral surface of the dispensing cylinder part A spout comprising a multi-layer cylindrical sleeve having a conductive resin layer, wherein the diaphragm and the lower end of the multi-layer cylindrical sleeve are positioned at a position to be a seal portion with the container body.   The spout according to claim 1, wherein the diaphragm is a multilayer thin film having a functional resin layer as an intermediate layer.   The spout according to claim 1 or 2, wherein a lower end of the multilayer cylindrical sleeve is deformed outward.   A spout having a dispensing cylinder part and an attachment part attached to the opening seal part of the container body, the diaphragm having a diaphragm for closing the spout in the dispensing cylinder part, and positioned above and below the diaphragm, An upper multilayer cylindrical sleeve and a lower multilayer cylindrical sleeve having a functional resin layer are provided on the inner peripheral surface of the dispensing cylindrical portion, and the lower end of the lower multilayer cylindrical sleeve serves as a seal portion with the container body. Spout characterized by being positioned.   The spout according to claim 4, wherein the thin film is formed so as to be positioned on substantially the same plane as a flange portion that protrudes from the outer periphery of the extraction tube portion.   A spout having a dispensing cylinder part and a mounting part attached to the opening seal part of the container body, wherein a multilayer tubular sleeve having a functional resin layer is provided on an inner peripheral surface of the dispensing cylinder part, and the multilayer cylinder A spout in which a diaphragm for closing the spout is provided in a cylindrical sleeve, and a lower end portion of the lower multilayer cylindrical sleeve is positioned at a position to be a seal portion of the container body.   A spout manufacturing method comprising a multi-layered cylindrical sleeve having a diaphragm for closing a spout in a pour cylinder and having a functional resin layer on an inner peripheral surface of the pour pipe, the functional resin Forming a multi-layered cylindrical sleeve having a layer, attaching the multi-layered cylindrical sleeve to an upper core mold, and positioning the mold together with the upper core mold in a cavity formed by a lower mold and a cavity mold, and clamping the mold; A step of injecting molten resin into the cavity, and in the mold clamping step, the lower end portion of the multilayer cylindrical sleeve reaches a cavity position that forms a mounting portion that becomes a seal portion with the container body. A method for producing a spout, characterized by being positioned.   An upper multi-layer cylindrical sleeve and a lower multi-layer cylindrical sleeve each having a diaphragm for closing the spout in the pour cylinder, and having a functional resin layer on the inner peripheral surface of the pour cylinder so as to be positioned above and below the diaphragm A method for producing a spout comprising a sleeve, the step of forming an upper multilayer cylindrical sleeve having a functional resin layer and a lower multilayer cylindrical sleeve, mounting the upper multilayer cylindrical sleeve on an upper core mold, Attaching the lower multi-layer cylindrical sleeve to a lower core mold, and positioning the upper multi-layer cylindrical sleeve and the lower multi-layer cylindrical sleeve in a cavity formed by a lower mold and a cavity mold, and clamping the mold; A step of injecting molten resin into the cavity, and in the clamping step, the positions of the upper multilayer cylindrical sleeve and the lower multilayer cylindrical sleeve in the cavity are the lower end of the upper multilayer cylindrical sleeve and Lower multi-layer cylindrical sleeve The end is positioned so as to substantially reach the position where the diaphragm is formed, and the lower end portion of the lower multilayer cylindrical sleeve is positioned so as to reach a cavity position that forms a mounting portion that becomes a seal portion with the container body. A method for producing a spout, characterized by comprising:   A spout manufacturing method comprising a multilayer cylindrical sleeve having a functional resin layer on an inner peripheral surface of a dispensing cylindrical portion, and a diaphragm for closing a spout in the multilayer cylindrical sleeve, the functional resin Forming a multi-layered cylindrical sleeve having a layer; forming a diaphragm on the multi-layered cylindrical sleeve to form a multi-layered cylindrical sleeve with a diaphragm; attaching the multi-layered cylindrical sleeve with a diaphragm to the upper core mold; A lower end portion of the multi-layer cylindrical sleeve with a diaphragm in the step of clamping the mold positioned in a cavity formed by a mold and a cavity mold, and injecting a molten resin into the cavity; A spout manufacturing method, wherein the spout is positioned so as to reach a cavity position that forms a mounting portion serving as a seal portion with the container body.   The step of forming the multilayer cylindrical sleeve with a diaphragm includes the step of forming the multilayer cylindrical sleeve having the functional resin layer, and the multilayer cylindrical sleeve is provided with a diaphragm having a height shorter than the axial length of the multilayer cylindrical sleeve. A multi-layered cylindrical sleeve molding lower core mold is inserted into the upper end surface of the multi-layered cylindrical sleeve molding lower core mold, the inner layer surface of the multilayered cylindrical sleeve projecting from the upper end surface, and the upper core mold. The spout manufacturing method according to claim 9, further comprising a step of injecting molten resin into the cavity.   The container body is formed of a gas barrier material, and the spout according to any one of claims 1 to 6 is integrally attached to the opening seal part of the container body by sealing the attachment part of the spout. A spouted container.

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