JP2011148512A - Closable tube container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a closable tube container in which a blocked face part of a path blocking body is equipped with an easily piercing property under a condition of having barrier properties. <P>SOLUTION: The closable tube container 1 includes: a tube container body 10; a resin opening head part 20 fixed on the tube container body 10; and the path blocking body 30 fixed on the opening head part. The path blocking body 30 is made into a cup shape by deep drawing using a laminated material in which an intermediate layer is a barrier layer. By engraving a half-cut K1 which does not cut the barrier layer on an outer face, an inner face or both faces of the blocked face part 31 being a part corresponding to the opening of the opening part of the path blocking body 30, the blocked face part 31 is equipped with the easily piercing property. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a closed tube container used as a container for processed foods, pharmaceuticals and the like.

  Conventionally, tube containers have been used as containers for processed foods, pharmaceuticals, quasi drugs, cosmetics, industrial products, hair dyes, and the like. Tube containers include aluminum tubes, laminated tubes, and others. The aluminum tube is formed from a single aluminum. Aluminum tubes have excellent barrier properties, but on the other hand, they are inferior in usability and portability because they are inferior in flexibility and are difficult to use if they are wrinkled and are easy to tear. Furthermore, since printing is carried out after the shape outside the cylinder is formed, most of the printing is performed by dry offset printing, which makes it difficult to perform beautiful fine printing (see [0002] of Patent Document 4). Since the laminate tube is elastically restored to its original form after the contents are pushed out, conversion to the laminate tube is attempted.

  There is a type of laminated tube in which an aluminum foil that closes the passage of the mouth is pasted. This aluminum foil can be peeled once and opened, and then the aluminum foil can be attached again. Accordingly, a closed laminate tube having a destructive opening type sealing structure has been adopted from the viewpoints of unauthorized opening / tampering and safety.

  Such a closed laminate tube includes a tube container main body, a mouth portion, and a passage closing body that closes a passage of the mouth portion. The passage closing body is formed into a cup shape by punching and drawing the laminated sheet, and is attached from the mouth portion of the mouth portion of the tube container to the inside of the shoulder portion by a compression method. A closed laminate tube having this structure is described in Patent Document 1.

  The passage closure body is made of aluminum foil or a laminated material with a barrier resin layer and plastic bonded together for reasons of manufacturing processes including suitability for deep drawing and functional properties including resistance to physical properties. It has been. This laminate material has the stability to withstand severe deep drawing, has a higher breaking stress than an aluminum tube closing film, and has the property of being difficult to open. The closed laminate tube described in Patent Document 1 has a weak adhesion between the oral head and the passage closing body provided on the inner surface of the oral head. For this reason, when trying to open the passage by breaking through the passage closing body by the opening projection attached to the cap, the upper portion of the passage closing body loses the force received from the opening projection and is oral. There is a risk of peeling from the part and falling inward.

Conventionally, two solutions have been disclosed for such problems at the time of opening.
One solution is to increase the coupling force between the upper part of the passage closure and the oral head. In Patent Document 2, an annular corner is formed on the outer peripheral portion of the convex end of the passage closing body, the annular corner is embedded in the inner surface of the oral head, and the protruding height of the annular corner is 0.1 to 0.1. A configuration is disclosed in which the thickness is 1.5 mm and the thickness is 2 to 3 times the original thickness of the closing material.

  Another solution is to sharpen the opening protrusion attached to the cap. According to Patent Document 3, in a tube cap provided with a passage closing body at the mouth, there is a curved surface section partitioned by three or four longitudinal ridge lines on the opposite side of the threaded portion that fits into the tube. Yes, each curved surface portion can be easily pierced without dropping off the passage closing body by providing a conical projection having a concave curved tip and a convex curved base end. It is said. Furthermore, according to Patent Document 4, the cone-shaped protrusion of Patent Document 3 is more sharply conical because there is a possibility that the passage closure body of the closed laminate tube having a diameter of less than Φ13 mm may not be punctured reliably and easily. Propose to provide a protrusion.

Utility Model Registration No.2542186 WO2007-043198 No. 03-54049 JP 2006-123918 A

  According to the solution described in Patent Document 2, the annular corner portion is formed by applying a closure material formed in a cup shape having a convex portion to the protrusion-like locking portion at the tip of the mandrel. After providing a space between the back side of the front end surface of the part and the front end of the locking part of the mandrel, the molten resin is disposed in the cavity of the molding die and smaller than the outer periphery of the front end surface of the convex part of the closing material. The hole pin having the outer periphery of the tip is pressed against the tip end surface of the projection of the closure material and the tip end surface of the projection of the closure material is folded. Then, the mandrel is press-fitted into the cavity of the mold and the annular corner portion is surrounded while the molten resin is pressed and filled into the cavity, thereby forming an oral head to which a closing material is attached. However, the molding of such an annular corner is complicated and expensive in equipment, and stable molding is difficult, and the barrier layer may be broken.

  In addition, the solutions described in Patent Documents 3 and 4 have a problem that the cap has to be provided with extremely sharp conical protrusions and lacks safety.

  The present invention has been devised in view of the above-described points, and an object of the present invention is to provide a closed-type tube container having an easy-to-break property in a state in which a closing surface portion of a passage closing body has a barrier property.

  In order to achieve the above object, a closed tube container according to the present invention includes a tube container body, a resin mouth fixed to the tube container body, and a passage closing body fixed to the mouth, The closing body is deep-drawn into a cup shape using a laminated material whose intermediate layer is a barrier layer, on the outer surface, inner surface or both surfaces of the closing surface portion which is a portion corresponding to the mouth opening of the passage closing body, The closed surface portion has an easy-to-break property by notching the barrier layer and forming a half cut only on the outer surface, inner surface or both surfaces of the laminated material.

  In the above configuration, the passage closing body is formed by deep drawing a laminated material whose intermediate layer is a barrier layer, and the barrier layer is made of an aluminum foil, a metal vapor deposition film, a silica vapor deposition film, EVOH (ethylene-vinyl alcohol copolymer resin). ) And nylon resins such as MXD6 (polymetaxylylene adipamide) can be used.

  In the above configuration, the half cut to be engraved on the passage closing body without cutting the barrier layer can be engraved by any of carbon dioxide laser, YAG laser, die cut press, rotary die cutter, knife and the like. When engraving half-cuts, the depth of half-cutting only the resin film covering the barrier layer is controlled. Further, when the half cut is engraved, various shapes in which the half cut portion does not fall out, such as “*” shape, “+” shape, “C” shape, “∈” shape, etc., are selected. . Furthermore, in the case of laser processing, the process of half-cutting can be set at an appropriate manufacturing stage, which is more advantageous than when engraved by a die-cut press.

When the half cut is engraved on the passage closure body,
(1) When the raw material of the laminated material is cut into a shape corresponding to the passage closing body,
(2) When deep drawing is performed,
(3) When assembled as a container,
(4) When the cap is attached,
Either may be sufficient.
In particular, according to laser processing, a half cut can be engraved on the inner surface of the passage closing body even after being assembled as a container.

  According to the said structure, since the half cut is engraved in the part corresponding to the opening of the mouth part of the oral head, it can be easily pierced by the opening projection having a sharp tip. The cap can be equipped with an opening protrusion with a sharp tip on the outer surface side of the cap, so that it is possible to prevent interference with the opening protrusion by putting a finger in the recess with the opening protrusion of the cap, and a highly safe closure A mold tube container can be provided.

  According to the above configuration, since the half cut is engraved in the portion corresponding to the mouth opening of the oral head, it has an easy breakability that can easily break through the passage closing body with the unsealing opening projection. Therefore, even when the closed tube container has a configuration in which the passage closing body is formed in a cup shape and is fixed to the inner surface of the mouth head, it is possible to solve the problem that the passage closing body does not break through and sinks into the container. .

  The closed tube container of the present invention is a fluid containing a wide variety of volatile and diffusing components such as toothpaste, cosmetics, viscous foods such as pastes and wasabi, shoes, caulks, waxing agents, pastes, etc. -It is suitable to be applied to a tube container suitable for packaging viscous materials.

  According to the present invention, the passage closing body having the barrier property has a half cut that does not destroy the barrier property at the portion corresponding to the passage, and has an easy-breaking property. Even if it is a blunt tip shape that is safe even if touched strongly with a finger, it can break through the passage closure body with a small piercing force, and the cap can be equipped with an opening projection with a blunt tip shape, which is a highly safe closure type A tube container can be provided.

(A) is a principal part longitudinal cross-sectional view of the closed type tube container which concerns on 1st Embodiment of this invention, (b) is a perspective view of the channel | path closure body which is a component of a closed type tube container, (c) is a channel | path closure. It is a typical principal part longitudinal cross-sectional view of a body. The schematic sectional drawing which concerns on 1st Embodiment and Example 1 of this invention, and concerns on an example of the laminated material for comprising the channel | path closing body of a closed type tube container is shown. It is a typical principal part longitudinal cross-sectional view of the channel | path closing body of the closed tube container which concerns on 2nd Embodiment. (A) is a perspective view of the channel | path closing body which concerns on Example 1, (b) shows the perspective view of the channel | path closing body which concerns on a comparative example.

Hereinafter, a closed tube container according to an embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
As shown in FIG. 1A, the closed tube container 1 of this embodiment includes a tube container main body 10, an oral head 20, a passage closing body 30 of the oral head 20, and a cap 40. It is a closed membrane tube container. When an object to be packaged containing a volatile component / diffusion component is filled from the lower end opening of the tube container body 10 and the lower end of the tube container body 10 is caulked and closed, a closed tube package is obtained.

  The oral head 20 is formed by a compression method, and is fixedly connected to the inner surface of the upper end portion of the tube container body 10 while fixing the passage closing body 30 installed on the inner surface.

  The raw material of the laminated material for constituting the passage closing body 30 is, as shown in FIG. 1 (c) and FIG. 2, in order from the outer layer side to the inner layer side, LLDPE (linear low density polyethylene) (f1) And PET (polyester) (f2), an aluminum foil (f3) as a barrier layer, PET (f4), and a multi-layer reinforcing film (f5), and each adhesive surface is bonded with an adhesive. Bonded. The multi-layer reinforcing film (f5) includes LLDPE (linear low density polyethylene) (f5a), O-Ny (stretched nylon) (f5b), and LLDPE (linear low density polyethylene) (f5c). A three-layer co-pressed film can be used. However, the purpose is not limited to this laminated structure.

  The passage closing body 30 is formed by cutting the raw material of the laminated material shown in FIG. 2 into a circular shape having a required diameter, and deep-drawing this circular material into a cup shape as shown in FIG. A passage closing body 30 shown in FIG. 1B includes a closed surface portion 31 whose upper end is closed, a cylindrical portion 32, a conical portion 33 extending below the cylindrical portion 32, and a flange portion 34 extending from the conical portion 33. It consists of. However, it is not intended to limit the shape.

  In the passage closing body 30 of this embodiment, when the oral head 20 is compression-molded, the outer peripheral portion of the collar portion 34 is molded in the shoulder portion of the oral head 20, and the conical portion 33 and the cylindrical portion 32 are formed of the oral head 20. It is welded from the shoulder to the inner surface of the mouth, and the closing surface 31 closes the mouth opening of the oral head 20.

  In the closed tube container 1, as shown in FIG. 1C, a half cut K <b> 1 that does not cut the barrier layer f <b> 3 is engraved on a portion corresponding to the mouth opening of the passage closing body 30, that is, on the outer surface of the closed surface portion 31. As a result, the passage closing body 30 has an easy-breaking property. In this embodiment, since the film f1 on the outer layer side is LLDPE (linear low density polyethylene) having a thickness of 30 μm, the half cut K1 has a cross shape so as to have a depth of 30 μm from the surface of the film f1 on the outer layer side. Is formed.

Hereinafter, other configurations will be further described.
As a specific example in the case where the tube container main body 10 is constituted by a laminated tube, a sheet obtained by cutting an original sheet of a laminated sheet is formed into a cylindrical shape by a side seam. For example, a barrier layer as an intermediate layer, one or more layers provided on the outer surface side of the barrier layer so that the outermost layer becomes a sealant, and 1 provided on the inner surface side of the barrier layer so that the innermost layer becomes a sealant. A laminated sheet having a layer or a plurality of layers is produced. For the barrier layer, an aluminum foil, a metal vapor-deposited film, a silica vapor-deposited film, EVOH (ethylene-vinyl alcohol copolymer resin), nylon resin such as MXD6 (polymetaxylylene adipamide), or the like can be used. Moreover, LLDPE (linear low density polyethylene) or LDPE (low density polyethylene) can be used for the sealant film.

  As a specific example of the laminated material for constituting the laminated tube, for example, in order from the outer layer side to the inner layer side, milk white LLDPE (linear low density polyethylene) layer / adhesive layer / EMAA (ethylene-methacrylic acid copolymer) Resin) or EAA (ethylene-acrylic acid copolymer resin) layer / adhesive layer / polyester polyol-based anchor coat layer / adhesive layer / substrate film layer with an inorganic compound vapor deposition layer formed on the surface side / adhesive layer / A laminated material having an EMAA (ethylene-methacrylic acid copolymer resin) layer / adhesive layer / LLDPE (linear low density polyethylene) layer can be used (Japanese Patent Laid-Open No. 2000-281095).

  The oral head 20 is made of a resin having weldability with the tube container body 10, for example, LLDPE (linear low density polyethylene) resin, and the inner surface of the upper end portion of the tube container body 10 is formed by the compression method. And welded to the outer surface of the passage closing body 30.

  The laminated material for constituting the passage closing body 30 is, for example, a multi-layer structure having an inner layer and an outer layer sealant film and a barrier layer as an intermediate layer, similarly to the laminated material for constituting the laminated tube. A raw fabric is produced from the laminated sheet, and the raw fabric is cut out into a circular shape. As described above, since the oral head 20 is made of LLDPE (linear low density polyethylene) resin and does not have a barrier property, the passage closing body 30 supports the barrier property. For the barrier layer of the passage closing body 30, similarly to the tube container body 10, aluminum foil, metal vapor deposition film, silica vapor deposition film, EVOH (ethylene-vinyl alcohol copolymer resin), MXD6 (polymetaxylylene adipamide), etc. Nylon resin can be used.

  According to the closed tube container 1 having the above-described configuration, the passage closing body 30 having the barrier property has the half cut K1 that does not destroy the barrier property in the closing surface portion 31 corresponding to the passage, and has easy breakthrough property. The tip of the opening projection of the passage closure body is changed from an acute-angled shape that is easily injured just by touching with a fingertip to a rounded tip shape that is difficult to be injured even if it is strongly touched with a finger, and the closing surface portion 31 is pierced with a small piercing force. Can do.

[Second Embodiment]
As shown in FIG. 3, the closed tube container according to the second embodiment is a half that does not cut the barrier layer f <b> 3 at the center between the outer surface and the inner surface of the closing surface portion 31 that is a portion corresponding to the mouth opening of the passage closing body. Since the cuts K1, K2 are engraved, the passage closing body has an easy-breaking property. When half cuts K1 and K2 are provided on both surfaces of the closed surface portion 31 as in this embodiment, they are engraved with a carbon dioxide gas laser and a YAG laser.
In addition, when half-cutting is provided on both sides at the original fabric stage, it can be engraved with any of a die-cut press, a rotary die cutter, a knife, and the like.

[Membrane structure]
The original membrane for constituting the passage closing body was constructed in the laminated structure shown in FIG.
In order from the outer layer side to the inner layer side, LLDPE (linear low density polyethylene) (thickness 30 μm) / PET (thickness 12 μm) / aluminum foil (thickness 50 μm) / PET (thickness 12 μm) / three-layer coextrusion A film (thickness 20 μm; LLDPE (linear low density polyethylene) / O-Ny (stretched nylon) / LLDPE (linear low density polyethylene); using Heptax (registered trademark) of Gunze Co., Ltd.)), and The close contact surfaces were bonded with an adhesive and aged for 1 day or longer.

[Measurement of puncture strength of membrane blank]
The membrane blank is cut into 100 mm square, sandwiched between two 100 mm square metal plates with holes of 50 mm in diameter, clamped on all sides with a vise, and pierced against the center of the membrane blank. The measurement was performed according to JIS-Z-1707. In this strength measurement, a needle having a tip radius of 0.5 mm and a diameter of 1 mm was pierced into the original membrane at a speed of 50 mm / min, and the maximum stress until penetrating was measured.
The piercing strength measurement for piercing from the outer layer side to the inner layer side was performed five times, and an average value of 30.09 N was obtained. Further, the piercing strength measurement for piercing from the inner layer side to the outer layer side was performed five times, and an average value of 27.01 N was obtained. From this, it was found that the puncture strength is affected by the resistance of the layer that penetrates in the initial stage. Since the puncture resistance of LLDPE (linear low density polyethylene) (30 μm) on the outer layer side is high, it has been found that applying a half cut to this layer is more effective than applying a half cut to the inner layer.

[Measurement of piercing strength of passage closures]
Next, ten passage closure bodies 30B shown in FIG. 4 (b) were manufactured by punching the membrane blank into a circular shape of a predetermined size and deep drawing the circular sheet. About five of them, a cross-shaped half cut K1 having a depth of 30 μm is put in the closed surface portion 31 as an example (passage closing body 30A shown in FIG. 4 (a)), and five passages without half cuts are made. The closing body 30B was used as a comparative example.
Therefore, as shown in FIG. 4 (a), the five passage closure bodies 30A (shown in FIG. 4 (b)) with the half-cut K1 and the half-cuts in the closing surface 31 shown in FIG. 4 (b). The piercing strength for piercing from the outer layer side to the inner layer side was measured according to JIS-Z-1707 for each of the five passage closing bodies 30B that could not be inserted.
The average value of the five piercing strengths of the passage closing body 30A was 20.87N, and the average value of the piercing strength of the passage closing body 30B was 29.69N.
Accordingly, the closing surface portion 31 of the passage closing body 30A including the half cut according to the first embodiment is more easily pierced than the closing surface portion 31 of the passage closing body 30B not including the half cut of the comparative example. It could be confirmed.

  From the result of Example 1, the passage closing body B according to the second embodiment shown in FIG. 3 is configured to include the half cuts K1 and K2 on both surfaces of the closing surface portion 31, and therefore, the outer surface of the closing surface portion 31 is half cut. It is inferred that it has a better piercing strength than the configuration provided with K1.

[Other Embodiments / Examples]
The present invention is not limited to the above-described embodiments and examples, and the technical scope of the claims includes various design changes within the scope not departing from the gist of the invention.

  The closed tube container of the present invention is also included in the technical scope of the present invention when a half cut is provided on the closed surface portion of the closed tube container having an annular corner shown in Patent Document 2.

  Although the said embodiment demonstrated the case where the tube container main body 10 was comprised with the laminate tube, the tube container main body 10 may be comprised with a polytube. A multilayer polytube is used as the polytube. For example, the inner layer is formed of a sealant resin by an extrusion molding method, and the outer layer is also formed by laminating the inner layer by an extrusion molding method using a plastic material having a barrier property, such as ethylene-vinyl alcohol or nylon resin. Only the inner surface of the closing surface portion 31 is engraved with a half cut that does not cut the barrier layer, so that the passage closing body may be easily breakable.

1 ... Closed tube container,
10 ... Tube container body,
20 ... oral,
30, 30A, 30B, 30C ... passage closing body,
31 ... closed face part,
32 ... cylindrical part,
33 ... conical part,
34 ... Buttocks,
40 ... Cap,
41 ... opening projection,
K1, K2 ... Half cut,

Claims (2)

A tube container main body, a resin mouth fixed to the tube container main body, and a passage closing body fixed to the mouth head, the passage closing body comprising a laminated material including a barrier layer in an intermediate layer In a closed tube container formed by deep drawing into a cup shape using,
A closed type characterized in that a half cut is engraved without cutting the barrier layer on the outer surface, the inner surface or both surfaces of the laminated material in the closing surface portion which is a portion corresponding to the mouth opening of the passage closing body. Tube container.   The closed tube container according to claim 1, wherein the half cut is engraved by laser processing.

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