JP2011046441A - Tube container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube container excellent in barrier properties while durability is ensured. <P>SOLUTION: This tube container 1 includes: a body portion 2 with a laminated structure including a metal foil as a barrier layer; a head portion 4 continuously provided at the upper end of the body portion 2 and having a spout 3 for a content; and a sheet-like shoulder pad 5 containing the barrier layer consisting of metal for covering the inner face of the head portion 4 and closing the spout 3. In addition, this tube container 1 is provided with a rolling seaming portion 12 where one of the lower end edge of a skirt portion of the shoulder pad 5 and the upper end edge 11 of the body portion 2 rolls and seams the other one, and on the head portion 4, a wrapping portion 14 for wrapping and covering the rolling seaming portion 12 is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention includes a body portion having a laminated structure including a metal foil as a barrier layer, a head portion continuously provided at an upper end of the body portion, having a spout for contents, and a barrier layer made of a metal material. In particular, the present invention intends to further improve the barrier property of the tube container. The tube container includes a sheet-like shoulder pad that covers the inner surface of the tube container and closes the spout.

  Conventionally, for example, in order to protect toothpaste, foods, cosmetics, pharmaceuticals, and other contents from ultraviolet rays, oxygen, and water vapor, as shown in FIG. 4, the body 2 'of the tube container 1' is made of a metal foil such as aluminum. For the purpose of further protecting the contents, a barrier layer is formed on the inner surface of the head portion 4 'having the content spout 3', particularly the shoulder portion 6 'of the head portion 4'. A technique of covering with a sheet-like shoulder pad 5 'is proposed (see, for example, Patent Document 1).

Japanese Utility Model Publication No.59-121345

  However, in the tube container 1 ′ configured as described above, as shown in FIG. 4, a resin material constituting the head portion 4 ′ is interposed between the shoulder pad 5 ′ and the trunk portion 2 ′, and air is passed through this gap. There was a problem that oxygen and the like contained in the tube container 1 ′. It is also possible to extend the shoulder pad 5 ′ to the body 2 ′ and solve the gap problem, and weld the lower end edge of the shoulder pad 5 ′ to the inner surface of the body 2 ′ (not shown). After all, since the resin is present at the welded portion between the shoulder pad 5 'and the body 2', the above problem cannot be completely solved. Furthermore, since the above-mentioned welding location does not have a core material such as aluminum foil locally and is more fragile than other portions, there is a risk that cracking or the like may occur due to the pressing operation of the tube body when the contents are poured out. There is also a problem in terms of durability.

  Therefore, an object of the present invention is to provide a tube container excellent in barrier properties while ensuring durability.

  In order to solve the above-described problems, a tube container according to the present invention includes a body portion having a laminated structure including a metal foil as a barrier layer, a head portion connected to an upper end of the body portion and having a content outlet, and a metal A tube container including a barrier layer made of a material, covering the inner surface of the head portion and closing the spout, and a tube container comprising: a lower end edge of a hem portion of the shoulder pad and the body portion In addition to providing a tightening portion in which the other end of the upper end is tightened, an enveloping portion that wraps and covers the tightening portion is provided in the head portion.

  In the tube container having such a structure, the body portion having the barrier property and the shoulder pad having the barrier property are combined at the tightening portion, so that the contents are completely sealed and protected by the barrier layer. Is done. Further, the connection between the lower end edge of the hem portion of the shoulder pad and the upper end edge of the body portion is achieved by a simple operation of winding the other side or the other side. Furthermore, since the core material (barrier layer) is continuously present from the body part to the head part, the durability is excellent. In addition, since the tightening part is covered with the enveloping part of the head part, there is no possibility that the tightening connection between the shoulder pad and the torso part is loosened by the pressing operation of the torso part in use, and the appearance shape is It is not conspicuous and has excellent design.

  In addition, in the tube container of this invention, it is preferable that the barrier layer of a shoulder pad is comprised with aluminum foil.

  According to the present invention, it is possible to provide a tube container having excellent barrier properties while ensuring durability.

It is a partial cross section figure of the tube container of embodiment which concerns on this invention. It is a partial cross section figure which expands and shows the head part of the tube container of FIG. It is a figure explaining the manufacturing method of the tube container of FIG. It is a partial cross section figure which shows the tube container according to a prior art.

  Embodiments of the present invention will be described below with reference to the drawings. Here, FIG. 1 is a partial cross-sectional view of the tube container according to the embodiment of the present invention.

  As shown in FIG. 1, a tube container 1 of the present invention includes a barrel portion 2 that contains contents, and a head portion that is connected to the upper end of the barrel portion 2 and opens a spout 3 for pouring the contents. 4 and a shoulder pad 5 for closing the spout 3 of the head portion 4 is disposed on the inner surface of the head portion 4.

  The trunk | drum 2 makes the aluminum laminated sheet which laminated | stacked the synthetic resin layer on both surfaces of aluminum foil, and is formed in a cylinder shape, and both sides are heat-seal | fused. The aluminum laminate sheet has an inner layer 2a made of synthetic resin such as polypropylene resin or polyethylene resin, a barrier layer 2b made of aluminum foil, and an outer layer 2c made of synthetic resin such as polypropylene resin or polyethylene resin in order from the inside. (See FIG. 2). A design or display for decoration can be printed on the outer layer 2c. The body 2 is not limited to a three-layer structure, and may have a structure of two layers or four layers or more, and a print layer (not shown) on which a design or display is printed may be separately stacked.

  The head portion 4 can be made of a polyolefin-based resin from the viewpoints of chemical resistance, processability, flexibility, and the like. Further, the head portion 4 may have a laminated structure. Polyolefin resins do not have barrier properties. The head portion 4 is formed by integrally forming a conical shoulder portion 6 that extends obliquely inward from the body portion 2 and a mouth portion 7 that opens the content outlet 3 in the center. Is welded to the body 2. On the outer peripheral surface of the mouth portion 7, there is provided a screw 8 that is screwed with a screw of a cap (not shown).

  The shoulder pad 5 is made of aluminum, has a bottomed cup shape having an easily openable top plate 9 at the upper end, and is provided with an enclosure portion 10 bent at a lower end edge of the hem portion in a U-shaped cross section. The upper end edge 11 of the body 2 is held between the openings. The shoulder pad 5 covers the inner surface of the head portion 4, particularly the inner surface of the shoulder portion 6, and imparts a barrier property to the head portion 4 instead of the head portion 4 having a low barrier property. A coating layer or a polyolefin resin layer (not shown) can be laminated on the inner surface of the shoulder pad 5 for the purpose of protecting the shoulder pad 5. The shoulder pad 5 can be composed of an aluminum laminate sheet in which an aluminum foil is used as a barrier layer and a synthetic resin layer is provided on the inner surface or both surfaces, similarly to the body portion 2. Easy openability can be improved.

  FIG. 2 is an enlarged partial sectional view showing the head portion 4 of FIG. 1, and the upper end edge 11 of the body portion 2 is inserted into the opening of the surrounding portion 10 of the shoulder pad 5 and the shoulder pad 5. The winding part 12 is formed by being bent inward along the outer surface of the body, and as a result, the body part 2 and the shoulder pad 5 are joined together by the winding part 12. In the illustrated example, the upper end edge 11 of the trunk portion 2 is wound around the enclosure portion 10 of the shoulder pad 5, but a structure in which both are wound together like a double lock seam, that is, the trunk portion 2 is shown. A similar enclosure (not shown) may also be provided on the upper edge 11 of the rim, and the two enclosures may be joined together by wrapping. The tightening portion 12 is wrapped and covered by the encapsulating portion 14 of the head portion 4, whereby the tightening connection between the shoulder pad 5 and the body portion 2 is firmly held.

  Next, a method for manufacturing the tube container of the present invention will be described. First, a flat thin aluminum plate is formed by pressing, and the shoulder pad 5 is formed by drawing into a bottomed cup shape while having a surrounding portion 10 having a U-shaped cross section at the outer edge and the opening facing downward. To do. The shoulder pad 5 is formed so that the taper angle thereof is substantially equal to the taper angle of the inner surface of the shoulder portion 6 of the head portion 4. As shown in FIG. 3A, the shoulder pad 5 molded in this way is inserted into the enclosure 10 with the upper end edge 11 of the barrel 2 and assembled to the barrel 2 by engagement or welding. It is done. Then, as shown in FIG. 3 (b), the upper end edge 11 of the body part 2 inserted into the enclosure part 10 is bent inward together with the enclosure part 10, and the body part is formed at the enclosure part 10 of the shoulder pad 5. The upper edge 11 of the part 2 is wound and joined. Thereafter, as shown in FIG. 3 (c), the head part 4 that has already been molded is assembled from above the shoulder pad 5 and the body part 2, and the shoulder pad 5 is attached to the head part 4 under a constant pressing force. While pressing, adhere by welding or high frequency bonding.

  In such a tube container 1, a cap (not shown) is fitted after the head part 4 is assembled, the contents are filled on the spot, and the lower end of the body part 2 is sealed by heat sealing, or the body It distribute | circulates in the state which opened the lower end of the part 2 (refer FIG. 1).

  When the contents are to be poured out, the top surface 9 of the shoulder pad 5 is pierced by a punching jig provided in a cap or the like, and the body part 2 is pressed to press the contents from the spout 3 of the mouth part 7. Can be poured out.

  According to the tube container 1 of this embodiment, since the trunk | drum 2 which has barrier property, and the shoulder pad 5 which also has this barrier property are couple | bonded in the winding part 12, all the contents are made of aluminum. It becomes possible to protect. Moreover, the coupling | bonding of the lower end edge of the skirt part of the shoulder pad 5 and the upper end edge 11 of the trunk | drum 2 is achieved by the simple operation | work which winds the other on the other hand. Furthermore, since aluminum with a high barrier property exists from the trunk | drum 2 to the head part 4, it is excellent in durability. Moreover, since the tightening portion 12 is covered with the encapsulating portion 14 of the head portion 4, there is a possibility that the tightening connection between the shoulder pad 5 and the torso portion 2 is loosened by the pressing operation of the torso portion 2 during use. In addition, the external shape is not conspicuous and the design is excellent. It should be noted that the enclosure portion 10 in the tightening portion 12 and the upper end edge 11 of the body portion 2 to be wound and joined to the enclosure portion 10 are welded to each other in the step of welding the shoulder pad 5 to the inner surface of the head portion 4. It is good also as a structure made to do.

  Thus, according to the present invention, it is possible to provide a tube container having excellent barrier properties while ensuring durability.

DESCRIPTION OF SYMBOLS 1 Tube container 2 Body part 3 Outlet 4 Head part 5 Shoulder pad 6 Shoulder part 7 Mouth part 8 Screw 9 Top surface 10 Enclosure 11 Upper edge of trunk part 12 Winding part 14 Covering part

Claims (2)

A body portion of a laminated structure including a metal foil as a barrier layer; a head portion connected to an upper end of the body portion and having a content outlet; a barrier layer made of a metal material; and an inner surface of the head portion In a tube container provided with a sheet-like shoulder pad that covers and closes the spout,
A wrapping portion that wraps one of the lower end edge of the hem portion of the shoulder pad and the upper end edge of the body portion is provided, and a covering portion that wraps the winding portion is provided on the head portion. Characteristic tube container.   The tube container according to claim 1, wherein the shoulder pad has a barrier layer made of aluminum foil.

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