Container

Abstract

To improve an opening property of a container whose tip portion at a trunk part thereof is closed with a laminate film molding body comprising resin layers and a barrier layer.SOLUTION: A tip portion at a trunk part 2 of a container 1 is closed with a dome-shaped laminate film molding body 3 comprising resin layers 11, 12, and a barrier layer 13. An easy-opening processing part 20 is provided on the laminate film molding body 3. The easy-opening processing part 20 comprises an opening start recess 21 made from a collapsed trace compression-deformed plastically in a thickness direction of the laminate film molding body 3.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a container having a body whose tip is sealed with a film molded body, and more particularly to a container in which the film molded body is constituted by a laminated film molded body in which a resin layer and a barrier layer are laminated. [Background technology]

[0002] For example, Patent Document 1 describes a flexible container in which a dome-shaped film body is provided at the tip of a body made of a cylindrical film. The tip of the body is closed by the film body. A cylindrical discharge outlet member with a male screw is provided on the outer surface of the film body.

[0003] The film molded product is a laminated film molded product that includes inner and outer resin layers and a middle barrier layer. For example, the inner resin layer is made of PET and the outer resin layer is made of PP. The barrier layer prevents the penetration of air and moisture and is made of metal such as aluminum. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-058640 Summary of the Invention [Problem to be solved by the invention]

[0005] In this type of container, for example, a pointed opening tool is inserted into the discharge outlet of the discharge outlet member and pushed in to break the laminated film molding and open the container. However, because the laminated film molding is a laminated film molding that includes a resin layer and a barrier layer, it may feel hard when opened. In view of the above circumstances, the present invention aims to improve the openability (ease of opening) of a container in which the tip of the body is sealed with a laminated film molding including a resin layer and a barrier layer. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a container having a body portion whose tip end is sealed with a laminated film molding including a resin layer and a barrier layer, The laminated film molding is provided with an easy-open processed portion, which is characterized in that the easy-open processed portion includes an opening trigger recess. The opening trigger recess serves as a trigger to open the laminated film molding along the easy-open processed portion. Preferably, the opening trigger recess is a crushed mark formed by compressive plastic deformation in the thickness direction of the laminated film molding. Preferably, the thickness of each of the resin layer and the barrier layer at the opening trigger recess is smaller than the thickness at a non-crushable portion (hard-to-open portion) adjacent to the easy-open processed portion in the laminated film molding. [Effects of the Invention]

[0007] According to the present invention, it is possible to improve the openability of a container in which the tip of the body is sealed with a laminated film molding including a resin layer and a barrier layer. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a container according to one embodiment of the present invention in a state where it is about to be opened with an opening jig. [Figure 2] 2 is a plan cross-sectional view taken along line II-II in FIG. 1, showing the easily openable treated portion shown in FIG. 1 in an exaggerated manner. [Figure 3] FIG. 3 is an enlarged cross-sectional view of the circle III in FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view of a laminated blank film that will become the laminated film molding. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1, a container 1 according to this embodiment is formed in the shape of a soft tube and includes a body 2, a laminated film molding 3, and a discharge outlet member 4. The body 2 is composed of a laminated film 2a including a resin layer and a barrier layer (details not shown). The laminated film 2a is rolled up into a cylindrical shape and sealed like an envelope.

[0010] As shown in FIG. 1, a laminated film molding 3 and a discharge outlet member 4 are provided at the tip end (upper end in FIG. 1) of the body 2. The laminated film molding 3 has a peripheral side portion 3a, a shoulder portion 3b, and a top portion 3c, and is formed in a generally dome shape. The body 2 is placed over the outer periphery of the annular peripheral side portion 3a and connected by welding. The shoulder portion 3b tapers in diameter from the tip end (upper end in FIG. 1) of the peripheral side portion 3a and protrudes toward the tip end (upper side in FIG. 1). The tip end (upper end in FIG. 1) of the shoulder portion 3b is provided with a top portion 3c that is circular in plan view. The top portion 3c may be flat or partially spherical. The tip end of the body 2 is closed by the laminated film molding 3.

[0011] 3 and 4, the laminate film molding 3 is formed by drawing a flat sheet-like laminate blank film 10. The laminate blank film 10, and therefore the laminate film molding 3, includes inner and outer resin layers 11 and 12 and an intermediate barrier layer 13.

[0012] The inner resin layer 11 is made of, for example, polyethylene terephthalate (PET). The outer resin layer 12 is made of, for example, polypropylene (PP), polyethylene (PE), etc. The middle barrier layer 13 is made of a metal such as aluminum and is impermeable to air and moisture. The thickness of the barrier layer 13 is preferably equal to or greater than the thickness of the inner resin layer 11 and equal to or less than the thickness of the outer resin layer 11, for example, about 30 μm to 50 μm. The total thickness of the laminate blank film 10 and therefore the laminate film molding 3 is, for example, about 80 μm to 120 μm. The resin materials of the resin layers 11 and 12, and the material, thickness, etc. of the barrier layer 13 are not limited to those described above.

[0013] As shown in FIG. 1, a discharge outlet member 4 is provided on the outer surface of the laminate film molding 3. The discharge outlet member 4 includes a shoulder cover 4b and a discharge outlet 4a. The shoulder cover 4b is formed in a tapered shape and overlaps the outer surface of the shoulder portion 3b of the laminate film molding 3. The discharge outlet 4a is provided at the tip of the shoulder cover 4b. The discharge outlet 4a is formed in a cylindrical shape and protrudes from the top 3c of the laminate film molding 3 toward the tip side (upward in FIG. 1).

[0014] The discharge outlet member 4 is formed by, for example, injection molding a light-transmitting resin. The laminated film molding 3 can be seen through the discharge outlet member 4. However, the discharge outlet member 4 does not necessarily have to be light-transmitting.

[0015] As shown in Fig. 1, the bottom opening 4c of the discharge outlet member 4 is blocked by the top 3c (openable portion) of the laminated film molding 3. As shown in Fig. 2, an easy-open treatment part 20 is formed in the top 3c (openable portion) of the laminated film molding 3. The easy-open treatment part 20 includes a plurality of opening trigger recesses 21. These opening trigger recesses 21 are arranged in an annular shape at intervals from one another in the circumferential direction of the inner peripheral edge of the bottom opening 4c. The easy-open treatment part 20 is annular and follows the inner peripheral edge of the bottom opening 4c. 2, the radial dimension of the laminated film molding 3 is exaggerated relative to the circumferential dimension. In FIG. 2, the number of opening trigger recesses 21 is eight, but is not limited to this, and may be nine or more, or seven or less.

[0016] 3, the opening trigger recess 21 is preferably formed by a crushed mark. That is, the laminated film molding 3 is compressed in the thickness direction at the opening trigger recess 21 and plastically deformed.

[0017] As shown in FIG. 2, each opening trigger recess 21 is formed in a generally trapezoidal (quadrilateral) shape in a plan view. The long side 21a of the trapezoidal opening trigger recess 21 is substantially in contact with the inner peripheral edge of the bottom opening 4c. Each opening trigger recess 21 protrudes radially from the inner peripheral edge of the bottom opening 4c toward the center of the top 3c of the laminated film molding 3, and its width along the circumferential direction of the top 3c gradually decreases. The distance H between the long side 21a and the short side 21b of each opening trigger recess 21 (the height dimension of the trapezoid (the radial dimension)) is preferably approximately 0.3 to 1.2 times the width W of the long side 21a of each opening trigger recess 21 (W×0.3≦H≦W×1.2).

[0018] As shown in Fig. 3, the thickness of each of the resin layers 11, 12 and the barrier layer 13 in the opening trigger recess 21 is preferably smaller than the thickness of the non-crushable portion 3d (particularly the portion adjacent to the easy-open processing portion 20) of the laminated film molding 3 that has not been crushed and that does not include the easy-open processing portion 20. In other words, the thickness of the inner resin layer 11 in the opening trigger recess 21 is smaller than the thickness of the inner resin layer 11 in the non-crushable portion 3d. The thickness of the outer resin layer 12 in the opening trigger recess 21 is smaller than the thickness of the outer resin layer 12 in the non-crushable portion 3d. The thickness of the barrier layer 13 in the opening trigger recess 21 is smaller than the thickness of the barrier layer 13 in the non-crushable portion 3d.

[0019] The thickness t2 of each layer 11, 12, 13 at the opening trigger recess 21 is preferably about 0.1 to 0.7 times, and more preferably about 0.3 to 0.5 times, the thickness t1 of the non-crushable portion 3d. The compression ratio ((t1-t2) / t1) of the thickness at the opening trigger recess 21 may be different for each of the layers 11, 12, 13. For example, the barrier layer 13 at the opening trigger recess 21 may be compressed more than the resin layers 11, 12.

[0020] As shown in Fig. 3, the opening trigger recess 21 is preferably recessed when viewed from the outside of the container 1 (the upper side in Fig. 3). The outer surface 12a of the outer resin layer 12, the interface 14 between the outer resin layer 12 and the barrier layer 13, and the interface 15 between the barrier layer 13 and the inner resin layer 11 are each recessed toward the inside of the container (the lower side in Fig. 3) at the opening trigger recess 21. Preferably, the amount of recession decreases toward the inside of the container (the lower side in Fig. 3) in the order of the outer surface 12a, the outer interface 14, and the inner interface 15. The inner resin layer 11, and therefore the container inner surface (the lower side in Fig. 3) of the laminate film molding 3, is preferably flat even in the portion corresponding to the opening trigger recess 21.

[0021] 3, a step 22 is formed between the edge of the opening trigger recess 21 and the adjacent non-crushable portion 3d. The outer surface 12a and the interfaces 14 and 15 are each bent at the step 22.

[0022] The laminated film molding 3 and discharge outlet member 4 of the container 1 are simultaneously drawn and injection molded by a molding device (not shown). That is, a laminated blank film 10 is drawn by a core mold of the molding device to be formed into the laminated film molding 3. A cavity is defined between the laminated film molding 3, which is still held by the core mold, and an opposing mold. A resin material for the discharge outlet member 4 is supplied to the cavity, and the discharge outlet member 4 is injection molded.

[0023] The opposing mold is provided with protrusions corresponding to the plurality of opening trigger recesses 21. As a result, simultaneously with the drawing, the portions of the laminated film molding 3 facing the protrusions are compressed in the thickness direction and plastically deformed, and the easy-open treated portion 20 is formed.

[0024] After the laminated film molding 3 and the discharge outlet member 4 are drawn and injection molded, the tip of the body 2 and the peripheral side portion 3a of the laminated film molding 3 are joined by high frequency welding or the like. After the contents are filled into the container 1 through the bottom opening of the body 2, the bottom opening is sealed to hermetically seal the container 1.

[0025] When in use, the laminate film molding 3 is opened by tearing the top 3c (portion to be opened). For example, as shown in Figures 1 and 3, an opening jig 5 having a cylindrical shape with the bottom surface cut obliquely and the tip 5a sharpened is inserted into the discharge outlet 4a, abutted against the laminate film molding 3 near the inner peripheral edge of the bottom opening 4c, and then pushed further downward. Then, the opening trigger recess 21 of 1 (usually closest to the tip 5a) triggers the laminate film molding 3 to break at the opening trigger recess 21 of 1.

[0026] At the opening trigger recess 21, the tensile strength or shear strength of the laminated film molding 3 is weakened by crushing during molding, so it can be easily broken by pushing in with the opening jig 5. In particular, at the edge of the opening trigger recess 21, the layers 11 to 13 of the laminated film molding 3 are bent by the step 22, so the tensile strength or shear strength is weakened, and it can be easily broken by the pushing force.

[0027] Furthermore, the tearing of the laminated film molding 3 progresses in the direction of the arrangement of the opening trigger recesses 21, i.e., along the inner peripheral edge of the bottom opening 4c. As a result, as shown by the two-dot chain line in Figure 3, the top portion 3c (the portion to be opened) of the laminated film molding 3 turns toward the inside of the container 1 (downward in Figure 3). In this way, the container 1 can be easily opened with a light force. As a result, the openability of the container 1 having the laminated film molding 3 including the resin layers 11, 12 and the barrier layer 13 can be improved.

[0028] The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. For example, the opening trigger recess 21 is not limited to a trapezoidal shape in plan view, but may be a rectangular shape, a triangular shape, or any other polygonal shape, or may be a circular shape or an oval shape. The opening trigger recess 21 may be formed in a continuous ring shape that extends seamlessly around the entire inner periphery of the bottom opening 4c of the discharge outlet member 4. The easy-open processing portion 20 (arrangement pattern of the opening trigger recesses 21) is not limited to a ring shape, and may be an X-shape, a cross shape, a Y-shape, a T-shape, a V-shape or other radial shape, an I-shape, etc. The opening trigger recesses 21 may be formed without interruption in an X-shape, a cross shape, a Y-shape, a T-shape, a V-shape or other radial shape, an I-shape, etc. The tip of the opening jig 5 may be conical or pyramidal. The inner surface of the container of the laminated film molding 3 may protrude into the inside of the container at a portion corresponding to the opening trigger recess 21. The container is not limited to being flexible, but may also be rigid. The outlet member 4 may be omitted. [Industrial Applicability]

[0029] The present invention is applicable to a discharge gun cartridge for fluids or viscous materials such as adhesives and paints. [Explanation of symbols]

[0030] 1 container 2. Torso 2a Laminated Film 3. Laminated film molding 3a Side 3b shoulder area 3c Top (part to be opened) 3d Non-squeezable part (difficult to open part) 4. Discharge port member 4a Discharge port 4b Shoulder part 4c bottom opening 5 Opening jig 10 Laminated Blank Film 11 Inner resin layer 12 outer resin layer 13 Intermediate barrier layer 12a External surface 14: Interface between outer resin layer 12 and barrier layer 13 15 Interface between barrier layer 13 and inner resin layer 11 20 Easy-to-open processing section 21 Opening trigger recess 22 steps

Claims

1. A container having a body portion whose tip is sealed with a laminated film molding including a resin layer and a barrier layer, A container characterized in that the laminated film molding is provided with an easy-open processing section, and the easy-open processing section includes an opening trigger recess consisting of a crushed mark caused by compressive plastic deformation in the thickness direction of the laminated film molding.

2. 2. The container according to claim 1, wherein the thickness of each of the resin layer and the barrier layer in the opening trigger recess is smaller than the thickness of a non-crushable portion adjacent to the easy-open processing portion in the laminated film molding.

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