Tube container with window and its manufacturing method

Abstract

To provide a tube container with a window which can improve designability and presents a new appearance by including a window part made with a desired shape and size, and to provide a manufacturing method of the same.SOLUTION: A tube container with a window includes: a tube container body 1A having an opaque trunk part 4 and for storing a content; and a cap 20 mounted on a mouth part 2 of the tube container body 1A. The trunk part 4 includes: an inner layer 7 formed into a cylindrical shape by transparent or semi-transparent resin; a cylindrical first outer layer 8A having a missing part 8a, formed by opaque resin and laminated on the outside of the inner layer 7; and a second outer layer 8B arranged in the missing part 8a, formed integrally with or separately from the inner layer 7, and comprising transparent or semi-transparent resin. Also, a window part 10 which allows observation of the inside of the trunk part 4, and a hiding part 9 which hides the second outer layer 8B are provided at the second outer layer 8B.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a tube container with a window and a method for manufacturing the same. [Background technology]

[0002] As a container with a window that allows the contents contained inside to be observed from the outside, Patent Document 1 discloses technology relating to a hollow body in which a bottle 2 formed from an opaque plastic wall has a transparent window 4 (corresponding to a window portion) partially provided in the vertical direction with transparent plastic. Furthermore, Patent Document 2 discloses a technique relating to a container 1 with a window in which a window 7 is formed partially at a desired height position, rather than over the entire height range of the container, and a molding method thereof. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 3-111243 [Patent Document 2] JP 2009-57072 A Summary of the Invention [Problem to be solved by the invention]

[0004] The window portions described in Patent Documents 1 and 2 are both vertical band-shaped and arranged in the vertical direction on the side of the body, and the design is uniform, resulting in a lack of interest and a lack of appeal compared to other containers of the same shape.

[0005] Furthermore, the containers with windows described in Patent Documents 1 and 2 are both bottle-type containers, and the existence of tube containers with windows was not known.

[0006] In order to solve the problems in the conventional technology described above, the present invention aims to create a windowed tube container and a manufacturing method thereof that can improve design and present a novel appearance by providing a window of a desired shape and size. [Means for solving the problem]

[0007] Among the means for solving the above problems, the first main means of the present invention is: It has an opaque body and contains the contents. Made of extruded tube A tube container with a window is configured to have a tube container body and a cap attached to the mouth part of the tube container body, The body is transparent or translucent. First resin only The inner layer is formed into a cylindrical shape by The second resin is colored in a specific color and then shaped into a cylinder. formed and laminated to the outside of the inner layer The second an outer layer and a transparent or semi-transparent layer disposed in the defect and formed integrally or separately from the inner layer; Third resin only and a second outer layer comprising: Except for the window Concealing the second outer layer It is printed as follows: The present invention is characterized in that a concealing portion is provided. The first main aspect of the present invention makes it possible to grasp the state of the contents inside the container through a window formed in the body, and by selectively varying the shape, size, arrangement, etc. of the window, it is possible to provide a windowed tube container with excellent design. Also, windows can be provided to extruded tubes having a laminated structure.

[0008] Another aspect of the present invention is the above The first main aspect of the present invention As a means, The window portion is formed by having a window frame portion formed by printing on the outer surface of the second outer layer in the same color or a different color from the first outer layer, and a see-through portion formed by laminating the inner layer and the second outer layer on the inside of the window frame portion. This is an additional measure to 。

[0009] Another aspect of the present invention is any one of the above aspects, further comprising the addition of a feature that the windows are intermittently disposed in the body. With the above-mentioned means, the remaining amount of the contents can be easily ascertained by looking through each of the intermittently arranged windows.

[0010] Another aspect of the present invention is any one of the above aspects, further comprising the addition that the concealing portion is formed in the same color as the first outer layer. With the above-mentioned means, it is possible to hide the portion of the second outer layer other than the window portion as necessary, thereby improving the design of the windowed tube container. Furthermore, another means of the present invention is any of the above means, in which the first resin is formed of medium density polyethylene (MDPE), the second resin is formed of low density polyethylene (LDPE), and the third resin is formed of the same medium density polyethylene (MDPE) as the first resin.

[0011] The second main aspect of the present invention is a method for producing a windowed tube container according to any one of the above aspects, comprising: A laminated sleeve is formed by extruding a second resin made of opaque low-density polyethylene (LDPE) that forms a first outer layer and a third resin that is disposed in a portion of the first outer layer and forms a second outer layer on the outer surface of a first resin made of transparent or semi-transparent medium-density polyethylene (MDPE) that forms an inner layer from a die in a laminated state, and then the extruded laminated sleeve is cut to a predetermined length, and the cut laminated sleeve is set in a predetermined mold to perform head molding to form a mouth portion and a shoulder portion at an end of the laminated sleeve. a container body molding step of forming a tube container body; The above Tube container body The above The method is characterized by having a printing process for printing a window frame portion on the outer surface of the second outer layer, and printing a concealing portion on the portion inside the window frame portion excluding the see-through portion.

[0012] The second main means of the present invention makes it possible to form various types of windows in the second outer layer provided on the molded tube container body and to dye it in other colors, thereby easily achieving the production of windowed tube containers with better design. Furthermore, a tube container body having a specific laminated structure can be easily and integrally formed.

[0013] Another aspect of the present invention is the above-mentioned second main aspect of the present invention, further comprising printing the concealing portion in the same color as the first outer layer in the printing step. In the above-mentioned method, by printing a concealing portion of the same color as the first outer layer on the second outer layer formed of a transparent or opaque resin, it is possible to hide the second outer layer, the presence of which may be unnecessary from a design perspective, as necessary, so that the first outer layer and the second outer layer are perceived as the same continuous outer layer.

[0014] Another aspect of the present invention is to use an extrusion molding method in the container body molding step in addition to any one of the above aspects. According to the above-mentioned means, the tube container body having the specific laminated structure can be easily and integrally formed.

[0015] Another aspect of the present invention is any one of the above aspects, further comprising the step of using any one of silk screen printing, offset printing, and hot stamping in the printing step. According to the above-mentioned method, printing on the second outer layer can be performed easily and with high accuracy, so that the design of the windowed tube container can be improved. Effect of the Invention

[0016] The present invention makes it possible to provide a window portion of the desired shape and size in the body portion, thereby creating a windowed tube container and a manufacturing method thereof that have an excellent design and a novel appearance. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a partial cross-sectional view showing a tube container body constituting a windowed tube container according to an embodiment of the present invention. [Diagram 2] 2 is an enlarged cross-sectional view taken along the line II-II of FIG. 1; [Diagram 3] The figures show a tube container with a window at various stages of production: (a) shows the stage before printing after molding, (b) shows the stage after printing, and (c) shows the finished stage after the bottom is sealed. [Figure 4] (a) shows the state in which the container is filled with the contents before printing, and (b) shows the state in which the container is filled with the contents after printing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a partial cross-sectional view showing a tube container body constituting a tube container with a window as an embodiment of the present invention, Fig. 2 is an enlarged cross-sectional view taken along the line II-II in Fig. 1, Fig. 3 shows a tube container with a window in the manufacturing stage, where (a) shows the pre-printing stage after molding, (b) shows the post-printing stage, and (c) shows the completed stage after the bottom is sealed. Fig. 4(a) shows the container in the pre-printing stage with the contents filled, and Fig. 4(b) shows the container in the post-printing stage with the contents filled.

[0019] The windowed tube container 1 of the present invention is a container for storing, for example, toothpaste, cosmetic cream, etc., and is composed of a tube container body 1A having a mouth portion 2 erected via a shoulder portion 3 on a body portion 4 made of a laminated structure and a bottom seal portion 5 provided at the lower end of the body portion 4, and a cap 20 (see Figure 3) that is attached to the mouth portion 2, all of which are formed using synthetic resin materials.

[0020] As shown in Fig. 1, a top wall 2A is formed at the upper end of the mouth 2 to close the mouth 2, and a pouring hole 2a is drilled in the center of the top wall 2A. Also, a locking piece 2b is provided around the outer periphery of the mouth 2 to lock the cap 20 that is to be attached.

[0021] As shown in FIG. 2, the body 4 having a laminated structure is formed with an inner layer 7 formed in a cylindrical shape from, for example, medium density polyethylene (MDPE) made of transparent or semi-transparent material, and a cylindrical outer layer 8 laminated on the outside of the inner layer 7. The outer layer 8 is formed with a first outer layer 8A formed in a cylindrical shape having a predetermined width in the circumferential direction and a vertically elongated strip-like cutout 8a formed in the height direction, and colored in a predetermined color by adding a colorant to, for example, low density polyethylene (LDPE), and a second outer layer 8B arranged in a vertically elongated strip-like shape by filling the cutout 8a with a transparent or semi-transparent synthetic resin and arranged adjacent to the first outer layer 8A in the circumferential direction. Note that since both the inner layer 7 and the second outer layer 8B are made of transparent or semi-transparent synthetic resin, they may be formed integrally or separately. A plurality of second outer layers 8B may be provided, and as described later, a concealing portion 9 for hiding the second outer layer 8B is partially provided on the outer surface of the second outer layer 8B as described later.

[0022] 1 and 2, in this embodiment, a plurality of (four in this embodiment) circular window portions 10 are intermittently arranged along the height direction on the outer surface of the second outer layer 8B that constitutes a part of the body 4. The window portions 10 are configured to have a see-through portion 12 formed by laminating the inner layer 7 and the second outer layer 8B, both of which are transparent or semi-transparent, inside a circular window frame portion 11, and as shown in Figures 3(b)(c) and 4(b), the contents P contained in the tube container body 1A can be observed through the see-through portions 12 of the plurality of windows 10, thereby making it possible to grasp the remaining amount of the contents.

[0023] Moreover, the shape and size of the window portion 10 can be freely determined, and by arranging various types of window portions 10, it is possible to create a windowed tube container 1 having a tube container body 1A that presents a novel appearance with excellent design. In addition, an ultraviolet absorbing material may be added to one or both of the synthetic resins forming the inner layer 7 and the second outer layer 8B that constitute the see-through portion 12, thereby protecting the contents P from deterioration due to ultraviolet rays.

[0024] Next, a method for manufacturing the tube container body 1A constituting the windowed tube container 1 having the above-mentioned structure will be described. (Container body forming process) First, an example of a molding process for the tube container body 1A will be described. In this embodiment, the tube container body 1A is formed by extrusion molding. That is, three types of molten resin (two types when the inner layer 7 and the second outer layer 8B are integral) extruded from three extruders (not shown) (two when the inner layer 7 and the second outer layer 8B are integral) are extruded (not shown) as a tubular laminated sleeve (extruded tube) through a predetermined die (not shown).

[0025] Here, the laminated sleeve is formed, for example, from a first resin made of transparent or semi-transparent medium density polyethylene (MDPE) forming the inner layer 7, a second resin made of opaque low density polyethylene (LDPE) forming the first outer layer 8A, and a third resin made of transparent or semi-transparent medium density polyethylene (MDPE) forming the second outer layer 8B. resin The first outer layer 8A is extruded from the die in a laminated state with the third resin forming the second outer layer 8B arranged in a vertically elongated strip shape on a part of the first outer layer 8A. Since the third resin is similar to the first resin in that it is transparent or translucent, it is also possible to form the third resin from the same medium density polyethylene (MDPE) as the first resin.

[0026] The extruded laminated sleeve is then cut into a sleeve of a specified length (not shown), and the sleeve is then set in a split die (not shown) and a head is formed at one end thereof to form a tube container body 1A having a mouth portion 2 and a shoulder portion 3, for example, as shown in FIG. 4(a).

[0027] (Printing process) Next, printing is performed on the molded tube container body 1A. In the printing process, a plurality of window frame portions 11, for example of a circular shape, are printed on the outer surface of the transparent or translucent second outer layer 8B, and concealing portions 9 of the same color as the first outer layer 8A are printed as necessary for decoration, at least in the portion excluding the see-through portion 12. The window frame portions 11 may be printed in the same color as the first outer layer 8A, or may be printed in a color different from that of the first outer layer 8A in consideration of design, as shown in Figures 3(b)(c) and 4(b).

[0028] This makes it possible to hide all or part of the elongated strip-shaped second outer layer 8B, making it impossible to see inside through the elongated strip-shaped second outer layer 8B, and also makes it difficult to distinguish it from the adjacent first outer layer 8A (see Figs. 3(b) and 4(b)). In other words, it becomes possible to make it impossible to grasp the state of the contents P in the tube container body 1A without looking through the window 10. As a method for the printing process, silk printing is preferable, but other methods such as offset printing or hot stamping are also possible.

[0029] (Finishing process) Finally, the tube container body 1A with the cap 20 attached to the mouth portion 2 is filled with the contents P, and the bottom seal portion 5 is welded and sealed, thereby completing the tube container 1 with a window.

[0030] Although the configuration and the effects of the present invention have been described above based on the embodiments, the present invention is not limited to the above embodiments.

[0031] For example, in the above embodiment, the tube container body 1A constituting the windowed tube container 1 is formed by extrusion molding, but the tube container body 1A shown in the embodiment of the present invention is not limited to the above embodiment, and may be formed by forming a cylindrical body by bonding the edges of a laminated film constituting the body, and then providing a head portion having a mouth portion and a shoulder portion at the end of the body.

[0032] In addition, in the above embodiment, a circular window portion 10 is shown and described, but the shape of the window portion 10 is not limited to a circle, and it may be other shapes, such as a square, diamond, or star shape, or a configuration in which different types of window portions are arranged.

[0033] In the above embodiment, the window portions 10 are arranged in a row in the height direction along the second outer layer 8B, which is formed in a vertically elongated strip shape. However, the circumferential width dimension of the second outer layer 8B is adjustable, and by configuring the second outer layer 8B to have a wider width, it is possible to arrange the window portions 10 in any position. [Industrial Applicability]

[0034] The present invention can expand the range of applications in the field of windowed containers, where design is essential, to an even wider range. [Explanation of symbols]

[0035] 1: Tube container with window 1A: Tube container body 2: Mouth 2A: Top wall 2a: Outlet hole 2b: Locking piece 3: Shoulder 4: Torso 5: Bottom seal 7: Inner layer 8 : Outer layer 8A: 1st outer layer 8a: Missing part 8B: 2nd outer layer 9: Hidden part 10: Window section 11: Window frame 12 : Transparent part 20: Cap P: Contents

Claims

1. A tube container with a window is configured to include a tube container body (1A) made of an extrusion tube having an opaque body portion (4) and containing a content, and a cap (20) attached to the mouth portion (2) of the tube container body (1A), a first outer layer (8A) having a cylindrical shape made only of a second resin colored a predetermined color and having a missing portion (8a) and laminated on the outside of the inner layer (7); and a second outer layer (8B) arranged in the missing portion (8a) and made only of a transparent or semi-transparent third resin formed integrally with or separately from the inner layer (7), wherein the second outer layer (8B) is provided with a window portion (10) through which the inside of the body portion (4) can be observed, and a concealing portion (9) formed by printing so as to conceal the second outer layer (8B) except for the window portion (10).

2. A windowed tube container as described in claim 1, wherein the window portion (10) is formed having a window frame portion (11) printed on the outer surface of the second outer layer (8B) in the same color or a different color as the first outer layer (8A), and a see-through portion (12) formed by laminating the inner layer (7) and the second outer layer (8B) inside the window frame portion (11).

3. 3. The windowed tube container according to claim 1, wherein the window portions (10) are intermittently arranged in the body portion (4).

4. 4. The windowed tube container according to claim 1, wherein the concealing portion (9) is formed in the same color as the first outer layer (8A).

5. A windowed tube container as described in any one of claims 1 to 4, wherein a first resin is formed of medium density polyethylene (MDPE), a second resin is formed of low density polyethylene (LDPE), and a third resin is formed of the same medium density polyethylene (MDPE) as the first resin.

6. A method for producing a windowed tube container according to any one of claims 1 to 5, comprising the steps of: a container body molding process in which a second resin made of opaque low density polyethylene (LDPE) forming a first outer layer (8A) and a third resin arranged on a part of the first outer layer (8A) forming a second outer layer (8B) are laminated on the outer surface of a first resin made of transparent or semi-transparent medium density polyethylene (MDPE) forming an inner layer (7) and extruded from a die to form a laminated sleeve, and then the extruded laminated sleeve is cut to a predetermined length, and the cut laminated sleeve is set in a predetermined mold and head molding is performed to form a mouth portion (2) and a shoulder portion (3) at an end of the laminated sleeve to form a tube container body (1A); a printing step of printing a window frame portion (11) on the outer surface of the second outer layer (8B) of the tube container body (1A) and printing a concealing portion (9) on the portion inside the window frame portion (11) excluding a see-through portion (12).

7. 7. The method for producing a tube container with a window according to claim 6, wherein in the printing step, the concealing portion (9) is printed in the same color as the first outer layer (8A).

8. 8. The method for producing a tube container with a window according to claim 6 or 7, wherein the printing step uses any one of silk printing, offset printing and hot stamping.

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