JP2020200062A - Barrier spout - Google Patents

Abstract

To acquire a barrier spout which is free from the problem in which an end part of a barrier multilayer film is exposed, immersed in a content and deteriorates, in the spout which is used for a pour-out container in which, at a film-like trunk part, a spout in which the barrier multilayer film is attached inside is fused and integrated.SOLUTION: A barrier spout (3) is used by being fixed to one end of a pour-out container (1) which allows a content to be poured out by pressing a flexible container body (2). The barrier spout includes a cylindrical pour-out port (312), a flange (313) spreading horizontally outward from a peripheral edge of a pour-out port lower end, and a barrier film (32) capable of closing the inside of the pour-out port by being fused to a flange inner surface. The flange includes a rib (314) across the whole periphery of the inside in parallel with an outer periphery, and the rib of the flange covers the end surface of the barrier film peripheral edge.SELECTED DRAWING: Figure 1

Description

The present invention is a barrier that fuses to one end of a pouring container that stores a high-viscosity liquid such as toothpaste or a medium-viscosity or low-viscosity liquid as a content and presses the content to pour out the content. Regarding spouts with sex.

As a container for storing high-viscosity liquids such as toothpaste, butter, mayonnaise, ketchup, and adhesives, or medium-viscosity and low-viscosity liquids such as cosmetics as contents, it has a flexible container body and presses. We have used a container for pouring, such as a tube container for pouring out the contents. The pouring container is mainly made by cutting a cylindrical extrusion tube and fusing the head to it, or rolling a laminated sheet to seal the back to form the body and welding the head to it. It is used in many food and non-food fields, including a container made of shavings, a sack made of laminated film, and a squeeze container with a spout plug fused to one end, or a thin-walled soft blow-molded container. Has been done.

As a method of molding the head with a spout, injection molding, compression molding, or the like is adopted, and in order to impart barrier properties, a method of fusing the barrier film to the body at the same time as molding and a method of molding are performed. A method of fusing the head in a separate process is known.
However, in order to impart barrier properties, these heads have a barrier layer interposed in the intermediate layer of the spout, but a metal foil, a metal vapor deposition layer, or a film on which an inorganic oxide is deposited is not coextruded. When a film is used, a head obtained by insert-molding and fusing the barrier-type laminated film has been used.

For example, in Patent Document 1,
It is composed of a pouring unit for pouring out the contents and a body portion welded to the pouring unit and for accommodating the contents.
The pouring unit includes a spout portion from which the contents are poured, and a shoulder portion that projects outward in the radial direction from the spout portion.
In the body portion, one side edge of one side edge of the film is overlapped with the other surface side of the other side edge edge, and the one side edge edge and the other side edge edge are welded to each other.
One end of the body portion in the axial direction is welded to the outer peripheral surface of the shoulder portion.
The other end of the body in the axial direction is closed by joining and welding the inner surfaces together.
The pouring unit has at least a surface in contact with the contents formed of a resin containing a non-adsorbent resin.
The film constituting the body is composed of at least three layers: an inner layer made of a resin containing a non-adsorbent resin, an intermediate layer which is a gas barrier layer containing a gas barrier substance, and an outer layer made of a resin containing a non-adsorbent resin. A tube container characterized by this is described.

In such a pouring container, since the multilayer film used for the pouring unit is inserted and injection molded while being fused, the end face of the insert film is exposed and corroded by the contents, eroded, oxidized, and so on. In addition to swelling and elution, problems such as peeling between layers have occurred.

Japanese Unexamined Patent Publication No. 2016-199280

In a spout used for a pouring container in which a spout having a barrier multilayer film bonded to the inside is fused to a film-like body of the pouring container, the end of the barrier multilayer film is It is an object of the present invention to obtain a barrier spout that is exposed and does not cause problems such as immersion in the contents and deterioration.

The barrier spout of the present invention is
In a spout used by fixing to one end of a dispensing container that allows the contents to be dispensed by pressing the flexible container body.
Cylindrical spout and
A flange that extends horizontally from the periphery of the lower end of the spout and
It is composed of a barrier film that can be fused to the inner surface of the flange to close the inside of the spout.
The flange has ribs parallel to the outer circumference and over the entire inner circumference.
A barrier spout characterized in that the end face of the peripheral edge of the barrier film is covered with the rib of the flange.

In the barrier spout of the present invention, the flange has ribs extending in parallel with the outer circumference and covers the entire inner circumference, and the ribs cover the end face of the peripheral edge of the barrier film, so that the end portion of the barrier film is exposed. It is possible to obtain high storage stability for a long period of time without causing problems such as deterioration by immersing in an object.

It is an example of a container using the barrier spout of the present invention, and is a vertical sectional view in a state where the lid portion of the hinge cap to be fitted is removed and opened, and a partially enlarged sectional view thereof. It is sectional drawing which shows the process of opening with the barrier spout of this invention. It is sectional drawing which shows the form example of the rib inside the flange and the form which covered the end face of the barrier film in the barrier spout of this invention. It is sectional drawing which shows the Example of Embodiment which fused the barrier film to the inner ring inside the cap in the barrier spout of this invention. It is sectional drawing which shows the other embodiment example of the container using the barrier spout of this invention.

Hereinafter, embodiments of the barrier spout of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a vertical cross-sectional view of a pouring container 1 using a barrier spout 3 showing an example of the present invention, in a state where the lid portion of the hinge cap to be fitted is removed and opened, and a partially enlarged cross-sectional view thereof. ..
The pouring container 1 using the barrier spout 3 of the present invention includes a thin-walled, highly flexible and flexible container body 2, a barrier spout 3 fused to one end of the container body 2, and a barrier spout 3. This is an example in which the container body 2 is formed into a tubular shape to form a tube container, which is composed of a cap 4 fitted to the container by screwing or tapping.

After filling the contents from the bottom of the pouring container 1, the bottom is sealed and sealed to form the sealing portion 26. When the spout is opened, the internal pressure rises by pressing the body 20 which is the flexible container body 2, and the contents are poured from the inside of the container having a high atmospheric pressure to the outside air to the outside having a low atmospheric pressure. By putting it out, the action of balancing works and the contents can be poured out.

The barrier spout 3 of the present invention is composed of an injection-molded spout 31 and a barrier film 32.
The spout 31 is composed of a tubular spout 312 that is fitted with a cap 4 and has a spout flow path 311 inside, and a flange 313 that extends horizontally from the peripheral edge of the lower end of the spout 312 to the outside.
On the outer surface of the tubular spout 312, a screw portion to be screwed into the cap 4 and a locking ring that can be plugged are processed.
The inner surface of the flange 313 shall be a horizontal flat surface. By making it flat, the barrier film 32 can be easily fused, and when the contents are poured out, the body portion 2 is pressed against the inner surface of the flange 313 until the end so that the contents do not remain. Can be done.

A rib 314 is provided inside the flange 313. The rib 314 is parallel to the outer circumference and is formed over the entire inner circumference.
The cross section of the rib 314 may be triangular, square, or trapezoidal, as shown in FIGS. 3-1 and 3-3. Further, as shown in FIG. 3-5, a step may be provided at the peripheral end portion. Basically, the barrier film 32 is completely inside the rib 314, can be inserted without providing a large gap, and has a height sufficiently higher than the thickness of the barrier film, and the rib tip is melted and melted. The rib height is set so that the resin has a volume that can reliably cover the end face of the barrier film 32.

The tip of the rib 314 is melted and the barrier film 32 is crimped by pressing with a hot plate or by swaging using an ultrasonic horn.

The barrier film 32 fused to the inside of the flange 313 has a barrier layer 321 having a barrier property, and a sealant layer 322 capable of being fused with a spout on the front and back surfaces thereof.
The outer sealant layer 322 is a sealant for fusing with the spout flange 313, and the inner sealant layer 322 is fused with the rib 314 of the spout 31 to reliably cover the barrier layer 321 to provide the barrier layer 321. It is a sealant for protection.

Then, as shown in FIGS. 3-2, 3-4, and 3-6, the peripheral edge portion of the barrier film 32 is crimped by the rib 314 of the flange 313, and the periphery and the end surface of the inner sealant layer are also crimped. It is fused and coated so that the barrier layer can be protected.
Since the end portion of the barrier film 32 can be protected in this way, the barrier layer 321 includes metal oxide vapor deposition such as silicon oxide on a metal foil such as aluminum foil or a biaxially stretched film such as polyethylene terephthalate or polyamide. A layered barrier film or a resin film such as an ethylene-vinyl acetate copolymer saponified product can be used.
Therefore, the barrier spout 3 can obtain a high barrier property.

FIG. 2 is an opening step of the pouring container 1 using the barrier spout 3 of the present invention.
FIG. 2-1 is a vertical cross-sectional view showing an example of an embodiment of a tube container in which a hinge cap is plugged into a barrier spout 3, and is a view showing a state before opening.
FIG. 2-2 shows a step of opening the lid of the hinge cap, hooking a finger on the pull ring 316 provided at the end of the closing plate 315 provided inside the spout 312 of the barrier spout 3, and starting to pull it up. Is.
The closing plate 315 is connected to the inner extension line of the flange 313 via a fragile wire 317, and the barrier film 32 is fused to the inside of the closing plate 315 together with the flange 313.

In FIG. 2-3, when the pull ring 316 is pulled up, the closing plate 315 is torn from the flange 313 along the fragile line 317 on the periphery of the closing plate 315. At the same time, the barrier film 32 fused to the closing plate 315 is also torn along the fragile line 317, and the spout 312 opens.
When the spout 312 opens, the contents can be spouted.

The container body 2 has a sealant layer 23 at least in the innermost layer, and is formed of a thin, highly flexible and flexible film or sheet.
The container body 2 basically has a barrier layer having a role of not allowing oxygen or the like to permeate or letting fragrance or the like escape through the intermediate layer or the outer layer in order to have a barrier property.

In the case of the container body 2 having a tubular body portion 20 such as the tube container shown in FIG. 1, a spout fusion portion 21 to be fused to the flange 33 of the barrier spout 3 is formed at the upper end, and the lower end is the content. The sealant layers 23 are put together to form the bottom seal portion 22 to form the tube container 1.

In the case of the container body 2 in which the four corners of the rectangle as shown in FIG. 5 are sealed, an opening hole is made in the front film or the back film, and the spout is exposed from the inside to the outside, around the outer surface side of the flange 33. The container body 2 is fused to the barrier spout 3.
The barrier spout 3 is processed into a packaging bag using a fused film, and one side of the bag is filled with the contents and then sealed and sealed.

The resin used for the barrier spout of the present invention needs to be a thermoplastic resin that can be fused to the film of the container body and also to the sealant layer of the barrier film.
Examples of such a fusing thermoplastic resin include low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, ethylene / propylene copolymer, cyclic polyolefin, and ethylene vinyl acetate. Copolymers, ionomer resins, ethylene / methyl acrylate copolymers, ethylene / acrylic acid copolymers, ethylene / ethyl acrylate copolymers, and the like can be used.
Further, polyethylene terephthalate, polybutylene terephthalate, and the like can also be used by modifying the surface by scanning a laser beam or the like to provide fusion property.

FIG. 4-1 is a cross-sectional view showing a second embodiment of the barrier spout 3 of the present invention in which the barrier film 32 is fused not only to the spout but also to the inner ring 41 inside the cap 4.
In this second embodiment, the height of the lower end of the inner ring 41 is designed to be the same as the lower surface of the flange 313 when the cap 5 is firmly screwed into the barrier spout 3.
Therefore, the barrier film 32 can be fused to the inner ring 41 and the flange 313 at the same time with the cap 4 fastened to the barrier spout 3.

FIG. 4-2 is a cross-sectional view showing a state in which the cap 5 screwed into the barrier spout 3 is rotated, loosened, and opened.
By rotating to open the cap 4, the barrier film 32 fused to the inner ring 41 is torn from the barrier film 32 fused to the flange 313 and opens.
In this way, it is possible to use a combination of a spout and a cap that opens without using a closing plate.
Further, the barrier film 32 is simply formed as a hollow hole in the spout spout without a molded product or the like, and the barrier film 32 is fused only to the surrounding flange 313, and the barrier film 32 that is a single unit inside the spout is used as the spout. It may be an example of an embodiment in which the film is cut with a cutting blade built in a cap or a cap.

Further, FIG. 5 is a cross-sectional view showing another embodiment of the pouring container 1 using the barrier spout 2 of the present invention.
In the embodiment of FIG. 5, the barrier spout 2 was inserted into the hole 241 opened in the front film 24 from the inside with the sealant layer, and the peripheral edge of the hole opened in the flange 313 was fused. Further, it is a pouring container 1 in which the rear film 25 is overlapped with the front film 24 so that the sealant surface faces each other, and the sealing portion 26 fused around the rear film 25 forms a packaging bag shape.
A gusset film bent with the sealant layer on the outside is inserted between the front film 24 and the rear film 25 and fused to increase the capacity as a gusset-shaped packaging bag, making it a free-form pouring container. It is also possible to do.

The film used for the container body of the present invention has a sealant layer as the innermost layer, but a laminated film having a barrier layer laminated is used.
As the barrier layer, a metal foil such as an aluminum foil may be used.
Further, a biaxially stretched film such as polyethylene terephthalate can be used, and a barrier layer provided with a vapor deposition layer of a metal such as aluminum or a vapor deposition layer made of an inorganic oxide on the inner surface or the outer surface thereof can be used.

As the inorganic oxide, metal oxides such as silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide, and yttrium oxide can be used. .. Among them, silicon oxide, aluminum oxide, magnesium oxide and the like are preferable from the viewpoint of productivity and price.

The sealant layer 23, which is the innermost layer of the laminated film forming the body portion 2, is a stable resin that does not deteriorate even when in contact with the contents, and needs to be a material that can be fused to the flange 33 of the spout 3. There is.
As the resin to be used, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, ethylene / propylene copolymer, ethylene vinyl acetate copolymer, ionomer resin, ethylene / methyl acrylate copolymer. , Ethylene / acrylic acid copolymer, ethylene / ethyl acrylate copolymer, etc. can be used.

As described above, the barrier spout of the present invention has ribs whose flanges are parallel to the outer periphery and cover the entire inner circumference, and the ribs cover the end face of the peripheral edge of the barrier film.
By covering the peripheral end face of the barrier film, the end portion of the barrier film is not exposed and problems such as deterioration or peeling due to immersion in the contents do not occur, and high long-term storage stability can be obtained.
Further, the barrier spout of the present invention can be made into a pouring container by incorporating it into various containers such as a tube container and a general packaging bag.
In addition, the above-mentioned pouring container can be manufactured at high speed not only by a general tube manufacturing line but also by a general-purpose bag making machine or a pillow / stick wrapping machine, so that the productivity is high and the cost is low. The merit of the present invention is great, such as being able to manufacture.

1 ・ ・ ・ ・ ・ ・ ・ ・ Dispensing container 2 ・ ・ ・ ・ ・ ・ ・ ・ Container body 20 ・ ・ ・ ・ ・ ・ ・ ・ Body 22 ・ ・ ・ ・ ・ ・ Barrier layer 23 ・ ・ ・ ・ ・・ ・ Sealant layer 24 ・ ・ ・ ・ ・ ・ Front film 241 ・ ・ ・ ・ ・ ・ Hole (open hole)
25 ... Rear film 26 ... Seal part 3 ... Barrier spout 31 ... Spout 311 ... Road 312 ..... spout 313 ..... flange 314 ..... rib 315 ..... closing plate 316 ..... pull ring 317 ..... Fragile line 32 ... Barrier film 321 ... Barrier layer 322 ... Sealant layer 4 ... Cap 41 ... Inner ring

Claims (3)

In a spout used by fixing to one end of a dispensing container that allows the contents to be dispensed by pressing the flexible container body.
Cylindrical spout and
A flange that extends horizontally from the periphery of the lower end of the spout and
It is composed of a barrier film that can be fused to the inner surface of the flange to close the inside of the spout.
The flange has ribs parallel to the outer circumference and over the entire inner circumference.
A barrier spout characterized in that the end face of the peripheral edge of the barrier film is covered with the rib of the flange. Claim 1 is characterized in that a closing plate having a peripheral edge surrounded by a fragile line is provided on the inner end surface of the spout, and the closing plate is pulled out together with a barrier film fused to the inner surface thereof so that it can be opened. Barrier spout described in. The barrier spout according to claim 2, wherein a ring for pulling out is provided at one outer end of the closing plate.

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