WO2024042958A1

WO2024042958A1 - Container

Info

Publication number: WO2024042958A1
Application number: PCT/JP2023/027005
Authority: WO
Inventors: 洋二田中
Original assignee: 株式会社ポリマーシステムズ
Priority date: 2022-08-23
Filing date: 2023-07-24
Publication date: 2024-02-29

Abstract

The present invention uses a laminated film molded body including a resin layer and a barrier layer to improve the openability of a container having a body end closed. The tip of the body 2 of a container 1 is closed with a dome-shaped laminated film molded body 3 including resin layers 11, 12 and a barrier layer 13. The laminated film molded body 3 is provided with an easy-to-open treated section 20. The easy-to-open treated section 20 includes an opening trigger recess 21 that is formed of a compression mark compressed and plastically deformed in the thickness direction of the laminated film molded body 3.

Description

container

The present invention relates to a container in which the tip of the body is closed by a film molded body, and particularly relates to a container in which the film molded body is a laminated film molded body in which a resin layer and a barrier layer are laminated.

For example, in the soft container described in Patent Document 1, a dome-shaped film molded body is provided at the tip of a body made of a cylindrical film. The tip of the body is closed by the film molded body. A cylindrical discharge port member with a male thread is provided on the outer surface of the film molded body.

The film molded body consists of a laminated film molded body including inner and outer resin layers and an intermediate barrier layer. For example, the inner resin layer is made of PET, and the outer resin layer is made of PP. The barrier layer blocks the permeation of air and moisture, and is made of metal such as aluminum.

JP2018-058640A

In this type of container, the laminated film molded body is broken and opened by, for example, inserting and pushing a sharp opening jig into the discharge port of the discharge port member. However, since the laminated film molded article is a laminated film molded article containing a resin layer and a barrier layer, it may feel hard when opened.
In view of such circumstances, an object of the present invention is to improve the unsealability (easiness of opening) of a container whose body end is closed by a laminated film molded body containing a resin layer and a barrier layer.

In order to solve the above problems, the present invention provides a container in which the tip of the body is closed with a laminated film molded body including a resin layer and a barrier layer,
The laminated film molded article is provided with an easy-to-open treatment section, and the easy-to-open treatment section includes an opening trigger recess.
The opening trigger concave portion serves as a trigger, and the laminated film molded article can be opened along the easy-opening processing portion.
Preferably, the unsealing trigger recess is formed by a crushing mark caused by compressive plastic deformation in the thickness direction of the laminated film molded body.
Preferably, the thickness of each of the resin layer and the barrier layer in the opening trigger recess is smaller than the thickness in a non-collapsible part (hard-to-open part) adjacent to the easily opened part in the laminated film molding.

According to the present invention, it is possible to improve the unsealability of a container in which the tip of the body is closed by a laminated film molded body including a resin layer and a barrier layer.

FIG. 1 is a longitudinal sectional view showing a container according to an embodiment of the present invention in a state where it is about to be opened with an opening jig. FIG. 2 is a plan cross-sectional view taken along the line II-II in FIG. 1, showing an exaggerated view of the easy-to-open processing section shown in FIG. FIG. 3 is an enlarged sectional view of circular portion III in FIG. FIG. 4 is an enlarged cross-sectional view of a laminated blank film that becomes the laminated film molded article.

An embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a container 1 according to the present embodiment includes a body 2, a laminated film molded body 3, and a discharge port member 4, and is formed into a soft tube shape. The body portion 2 is constituted by a laminated film 2a including a resin layer and a barrier layer (details not shown). The laminated film 2a is rolled into a cylindrical shape and pasted onto an envelope.

As shown in FIG. 1, a laminated film molded body 3 and a discharge port member 4 are provided at the distal end portion (upper end portion in FIG. 1) of the body portion 2. The laminated film molded body 3 has a circumferential side portion 3a, a shoulder portion 3b, and a top portion 3c, and is formed into a generally dome shape. The body portion 2 is placed over the outer periphery of the annular circumferential side portion 3a and connected by welding. The shoulder portion 3b projects from the distal end (upper end in FIG. 1) of the peripheral side portion 3a toward the distal end (upper end in FIG. 1) while being tapered in diameter. A top portion 3c that is circular in plan view is provided at the tip portion (upper end portion in FIG. 1) of the shoulder portion 3b. The top portion 3c may be flat or partially spherical. The tip of the body 2 is closed by the laminated film molded body 3.

As shown in FIGS. 3 and 4, the laminated film molded body 3 is constructed by drawing a flat sheet-shaped laminated blank film 10. The laminated blank film 10 and thus the laminated film molded body 3 include inner and

outer resin layers

11 and 12 and an intermediate barrier layer 13.

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), or the like. The intermediate barrier layer 13 is made of metal such as aluminum and is impermeable to air and moisture. The thickness of the barrier layer 13 is preferably greater than or equal to the thickness of the inner resin layer 11 and less than the thickness of the outer resin layer 11, and is, for example, about 30 μm to 50 μm. The total thickness of the laminated blank film 10 and thus the laminated film molded body 3 is, for example, about 80 μm to 120 μm.
Note that the resin materials of the

resin layers

11 and 12 and the material and thickness of the barrier layer 13 are not limited to those described above.

As shown in FIG. 1, a discharge port member 4 is provided on the outer surface of the laminated film molded body 3. The discharge port member 4 includes a shoulder cover 4b and a discharge port 4a. The shoulder cover 4b is formed into a tapered shape and overlaps with the outer surface of the shoulder portion 3b of the laminated film molded body 3. A discharge port 4a is provided at the tip of the shoulder cover 4b. The discharge port 4a is formed in a cylindrical shape and protrudes from the top 3c of the laminated film molded body 3 toward the tip side (upper side in FIG. 1).

The discharge port member 4 is constructed by injection molding a translucent resin, for example. The laminated film molded body 3 can be visually recognized through the discharge port member 4. Note that the discharge port member 4 does not necessarily have to have translucency.

As shown in FIG. 1, the bottom opening 4c of the discharge port member 4 is closed by the top 3c (unsealed portion) of the laminated film molded body 3. As shown in FIG. 2, an easy-to-open portion 20 is formed on the top portion 3c (unsealed portion) of the laminated film molded body 3. The easy-to-open processing section 20 includes a plurality of opening trigger recesses 21 . These opening trigger recesses 21 are annularly arranged at intervals in the circumferential direction of the inner peripheral edge of the bottom opening 4c. The easy-opening processing section 20 has an annular shape along the inner peripheral edge of the bottom opening 4c.
In addition, in FIG. 2, the dimension along the radial direction of the laminated film molded body 3 is exaggerated with respect to the dimension in the circumferential direction. 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.

As shown in FIG. 3, the opening trigger recess 21 is preferably formed by a crushing mark. That is, the laminated film molded body 3 is compressed and plastically deformed in the thickness direction in the opening trigger recess 21 .

As shown in FIG. 2, each opening trigger recess 21 is formed into a generally trapezoidal shape (square shape) in plan view. The long side portion 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 projects from the inner peripheral edge of the bottom opening 4c toward the center of the top 3c of the laminated film molded body 3 in the radial direction of the top 3c, and the width dimension along the circumferential direction of the top 3c gradually decreases. There is. The distance H (the height dimension of the trapezoid (the dimension in the radial direction)) between the long side 21a and the short side 21b of the opening trigger recess 21 is preferably 0 of the width W at the long side 21a of the opening trigger recess 21. It is about .3 times to 1.2 times. (W×0.3≦H≦W×1.2).

As shown in FIG. 3, preferably, the thickness of each of the resin layers 11, 12 and the barrier layer 13 in the opening trigger recess 21 is such that the thickness of each of the resin layers 11, 12 and the barrier layer 13 in the opening trigger recess 21 is set so that the thickness of each of the resin layers 11, 12 and the barrier layer 13 in the unsealing trigger recess 21 is such that a It is smaller than the thickness of the portion 3d (particularly the portion adjacent to 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-collapsible 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-squashable part 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-collapsed part 3d.

The thickness t2 in the opening trigger recess 21 of each

layer

11, 12, 13 is preferably about 0.1 to 0.7 times, more preferably about 0.3 to 0.5 times the thickness t1 in the non-collapsed portion 3d. It is. The compression rate ((t1-t2)/t1) of the thickness in the opening trigger recess 21 may be different for each

layer

11, 12, and 13. For example, the barrier layer 13 in the opening trigger recess 21 may be compressed more than the resin layers 11 and 12.

As shown in FIG. 3, preferably, the opening trigger recess 21 is 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 located inside the container (in FIG. It is concave to the bottom). Preferably, the amount of the dent becomes smaller as the outer surface 12a, outer interface 14, and inner interface 15 move toward the inner side of the container (lower side in FIG. 3) in this order. The inner resin layer 11 and the inner surface of the container (lower surface in FIG. 3) of the laminated film molded body 3 are preferably flat also in the portion corresponding to the opening trigger recess 21.

As shown in FIG. 3, a step 22 is formed at the edge of the opening trigger recess 21 between it and the adjacent non-collapsible portion 3d. The outer surface 12a and the

interfaces

14, 15 are each bent at a step 22.

The laminated film molded body 3 and the discharge port member 4 of the container 1 are simultaneously drawn and injection molded by one molding device (not shown). That is, the laminated blank film 10 is drawn into the laminated film molded body 3 by the core mold of the molding device. A cavity is defined between the laminated film molded body 3 held in the core mold and the opposing mold. A resin material for the discharge port member 4 is supplied to the cavity, and the discharge port member 4 is injection molded.

The opposing mold is provided with protrusions that correspond to the plurality of opening trigger recesses 21. As a result, at the same time as the drawing process, the portions of the laminated film molded body 3 facing the respective protrusions are compressed in the thickness direction and plastically deformed, thereby forming the easy-open processing portions 20.

After drawing and injection molding the laminated film molded body 3 and the discharge port member 4, the tip of the body 2 and the circumferential side portion 3a of the laminated film molded body 3 are joined by high frequency welding or the like.
After filling the container 1 with the contents through the bottom opening of the body 2, the bottom opening is sealed to seal the container 1.

When in use, the top 3c (part to be opened) of the laminated film molded body 3 is broken to open it. For example, as shown in FIGS. 1 and 3, an unsealing jig 5 having a shape in which the bottom surface of a cylinder is cut diagonally and the tip 5a is sharpened is inserted into the discharge port 4a, and the opening jig 5 is inserted near the inner peripheral edge of the bottom opening 4c. abut against the laminated film molded body 3 and push it further downward. Then, the first opening-triggering recess 21 (usually closest to the tip 5a) serves as a trigger, and the laminated film molded body 3 is broken at the one opening-triggering recess 21.

Since the tensile strength or shear strength of the laminated film molded body 3 is weakened in the opening trigger recess 21 due to crushing during molding, it can be easily broken by pushing the opening jig 5. In particular, at the edge of the opening trigger recess 21, each layer 11 to 13 of the laminated film molded body 3 is bent by the step 22, so the tensile strength or shear strength is weakened, and it is easily broken by the pushing force. can be done.

Further, the rupture of the laminated film molded body 3 progresses in the direction in which the opening trigger recesses 21 are lined up, that is, along the inner peripheral edge of the bottom opening 4c. As a result, as shown by the two-dot chain line in FIG. 3, the top 3c (unsealed portion) of the laminated film molded body 3 is turned over to the inside of the container 1 (downward in FIG. 3). In this way, the container 1 can be easily opened with light force.
As a result, the unsealability of the container 1 provided with the laminated film molded body 3 including the resin layers 11 and 12 and the barrier layer 13 can be improved.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.
For example, the opening trigger recess 21 is not limited to a trapezoid in plan view, but may be rectangular, triangular, or other polygonal shape, or may be circular or oval.
The unsealing trigger recess 21 may be formed in an annular shape continuous throughout the inner peripheral edge of the bottom opening 4c of the discharge port member 4 without any break.
The easy-to-open processing portion 20 (the arrangement pattern of the opening trigger concave portions 21) is not limited to an annular shape, but may be an X-shape, a cross-shape, a Y-shape, a T-shape, a V-shape, other radial shapes, or an I-shape. Good too. The opening trigger recess 21 may be seamlessly formed in an X-shape, cross-shape, Y-shape, T-shape, V-shape, other radial shape, I-shape, or the like. The tip of the opening jig 5 may have a conical or pyramidal shape.
The inner surface of the container of the laminated film molded body 3 may protrude toward the inner side of the container at a portion corresponding to the opening trigger recess 21.
The container is not limited to being soft, and may be hard.
The discharge port member 4 may be omitted.

The present invention can be applied, for example, as a discharge gun cartridge for fluids and viscous materials such as adhesives and paints.

1 Container 2 Body part 2a Laminated film 3 Laminated film molded body 3a Circumferential side part 3b Shoulder part 3c Top part (part to be opened)
3d Non-squeezable part (difficult to open part)
4 Discharge port member

4a Discharge port

4b Shoulder cover

4c Bottom opening 5 Opening jig 10 Laminated blank film 11 Inner resin layer 12 Outer resin layer 13 Intermediate barrier layer 12a Outer surface 14 Between outer resin layer 12 and barrier layer 13 Interface 15 Interface 20 between barrier layer 13 and inner resin layer 11 Easy-opening processing section 21 Opening trigger recess 22 Step

Claims

A container in which the tip of the body is closed by a laminated film molded body including a resin layer and a barrier layer,
The laminated film molded article is provided with an easy-opening treatment section, and the easy-opening treatment section includes an opening trigger recess made of a crush mark caused by compressive plastic deformation in the thickness direction of the laminated film molded article. container.
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 in a non-collapsible part adjacent to the easy-opening part in the laminated film molding.