JPH0516949A - Squeezable tube container - Google Patents

Abstract

PURPOSE:To provide a squeezable tube container with heat resistance to the sterilization process by retort, by which a content in the tube container can be seen through from the outside. CONSTITUTION:The body part of the tube container 8 is formed of a laminated sheet 1 which consists of a surface layer 7 made of a transparent heat-sealable resin layer with a melt temperature of 110 deg.C or higher, the same rear surface layer 6, and a transparent layer with barrier property 4, which is located between the surface layer and the rear surface layer, in such a manner that the rear surface layer 6 becomes the inner peripheral surface layer of the body part. In addition, the heat part of the tube container 8 is made of a thermoplastic resin with a melt temperature of 110 deg.C or higher.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded tube container having heat resistance capable of withstanding retort sterilization treatment after encapsulation of the inner filler, and the state of the inner filler enclosed in the tube container. There is provided an extruded tube container capable of seeing through from outside.

[0002]

2. Description of the Related Art An extruded tube container, in which a fluid-semi-fluid filling material represented by a paste-like material is enclosed, is a tubular container body having a closed lower end and a tubular container body. The head is composed of a frustoconical shoulder continuing to the upper end of the section and a mouth-neck of a thin neck continuing to the head, and a cap that is detachably engaged with the mouth-neck.

Particularly in an extruded tube container in which an anaerobic filling material is sealed, a metal foil such as an aluminum foil is used in a laminated sheet constituting the body of the container, and the barrier property due to the metal foil is used. The storage performance of the filling material is fulfilled.

[0004]

By the way, in the extruded tube container using the above-mentioned conventional metal foil such as aluminum foil, the excellent barrier property is exhibited due to the characteristics of the material of the body of the tube container. However, the inner filler filled in the tube container cannot be seen through from the outside. For this reason, not only the effect of appealing to consumers is lacking, but also the remaining amount of the inner filler and the type of the inner filler cannot be confirmed from the outside, which is inconvenient.

On the other hand, the present invention provides an extruded tube container capable of seeing through the inside of the tube container from the outside and having heat resistance against sterilization treatment by a retort.

[0006]

In order to solve the above-mentioned problems, the extruded tube container of the present invention comprises a transparent barrier layer and a transparent heat-sealable resin layer having a melting temperature of 110 ° C or higher. And the same surface layer 11
A tube container body made of a laminated sheet having a back layer composed of a transparent heat-sealable resin layer having a melting temperature of 0 ° C. or higher is used, and a head made of a thermoplastic resin having a melting temperature of 110 ° C. or higher is used. It consists of using.

That is, the extruded tube container of the present invention comprises a tubular container body whose lower end is closed,
A tube having a frustoconical shoulder engaged with the upper end of the tubular container body and a head composed of a neck and neck portion of a thin neck continuous to the shoulder, and the tube container body being a laminated sheet It is formed in a shape.

The tubular body forming the body of the tube container is
A surface layer made of a transparent heat-sealing resin layer having a melting temperature of 10 ° C. or higher, a back surface layer made of a transparent heat-sealing resin layer having a melting temperature of 110 ° C. or higher, and the front surface layer and the back surface layer. The laminated sheet including the transparent barrier layer located between the two is molded such that the back surface layer of the laminated sheet becomes the inner peripheral surface layer of the tube container. The transparent barrier layer in this laminated sheet was 2.0 g / m ² · 24 hr (40 ° C, 9 ° C).
Water vapor permeability of 0% RH) or less and 2.0 cc / m ² ·
At least one of the oxygen permeability of 24 hr (1 atm, 20 ° C., dry) or less is satisfied.

Further, at the open end edge of the tube container body, a head composed of a frustoconical shoulder portion which is heat-fused to the inner peripheral surface of the container body, and a mouth and neck portion of a thin neck continuous with the shoulder portion,
It is formed of a thermoplastic resin having a melting temperature of 110 ° C. or higher.

In the extruded tube container of the present invention having the above structure, the front surface layer and the back surface layer in the laminated sheet formed in the body of the tube container are made of, for example, linear low density polyethylene, high density polyethylene, polypropylene, etc. The thickness is about 50 to 100 μ. When the front surface layer and the back surface layer are formed of the same type of resin, the heat welding step when forming the tube container body portion by the laminated sheet is extremely easy, and the sealing by the heat adhesive portion is performed. The adhesive strength of the part becomes high.

The barrier layer located between the front surface layer and the back surface layer is usually subjected to a makeup treatment by printing, but the makeup treatment is performed so that the entire body of the tube container is not opaque. Of course, is applied.

The transparent barrier layer is 2.0 g / m ² ·
Water vapor permeability below 24 hr (40 ° C, 90% RH) and 2.0 cc / m ² · 24 hr (1 tm, 20 ° C, dr
y) It has a barrier performance that satisfies at least one of the following oxygen permeability, and for example,
Vinylidene chloride resin coated biaxially stretched thermoplastic resin film, PVA coated biaxially stretched thermoplastic resin film, biaxially stretched PVA film, vinylidene chloride resin film, 2
A composite film of an axially stretched thermoplastic resin film and a vinylidene chloride resin film or PVA film, a thermoplastic resin film having a thin film layer of an inorganic oxide or an oxide of an amphoteric metal, etc. having a thickness of about 10 to 100 μm Is used. As the biaxially stretched thermoplastic resin film, for example, a film made of polyester, nylon, polyolefin resin or the like having a thickness of about 10 to 50 μ is used. The thin film layer of an inorganic oxide or an oxide of an amphoteric metal is made of tin oxide in comparison with a thermoplastic resin film such as a biaxially stretched film having a thickness of about 9 to 50 μm such as nylon, polyester or polypropylene. , Zinc oxide, silicon oxide, indium oxide, titanium oxide, aluminum oxide, etc., thickness 100-5000Å, preferably 400-1
Vacuum deposition, sputtering, thin film layer of about 000Å
A film formed by chemical vapor deposition or the like is used. As a thin film layer of an inorganic oxide, when it is made of silicon oxide, coloring is extremely small and good barrier property can be obtained.

The surface layer and the barrier layer and the barrier layer and the back layer are generally adhered to each other with an adhesive, for example, by a dry laminating method using a urethane adhesive or the like. Each is laminated.

The tube container body is made of a tubular body made of the above-mentioned laminated sheet, and has a tubular shape such that the back surface layer of the other side edge is in contact with the surface layer of one side edge of the laminated sheet. It is obtained by being formed on a body and heat-welding the side portions thereof.

At the open end edge of the tube container body, the head composed of a frustoconical shoulder portion which is heat-welded to the inner peripheral surface of the container body and a neck and neck portion of a thin neck continuous thereto is a laminated sheet. When it is formed of a thermoplastic resin of the same quality as the back surface layer, the thermal adhesion between the two becomes good.

[0016]

In the extruded tube container of the present invention, the tube container body and the mouth and neck are provided with extremely excellent heat resistance capable of withstanding boil sterilization and retort sterilization. It is transparent enough to see through the filling material inside the container.

[0017]

EXAMPLES The specific constitution of the extruded tube container for retort treatment of the present invention will be described with reference to production examples.

EXAMPLE 1 In FIG. 1, a vacuum vapor deposition layer 3 of silicon oxide (SiO _x ) having a thickness of 500 Å is formed on one side of a PVA film 2 having a thickness of 15 μ, thereby forming a barrier film made of a silicon oxide vapor deposition film. After obtaining the film 4, a decorative process 5 by printing is applied to the surface of the vacuum deposited layer 3 of silicon oxide, and the front and back surfaces of the barrier film 4 are each corona discharge treated on one side. A transparent laminated sheet 1 was obtained by laminating the corona discharge treated surfaces of the 130 μm linear medium density polyethylene (melting temperature 125 ° C.) films 6 and 7 using a urethane adhesive. The water vapor permeability of the barrier film 4 is 0.5 g / m ² · 2
4hr (40 ℃, 90% RH), oxygen permeability 0.6c
c / m ² · 24 hr (1 atm, 20 ° C, dry).

Subsequently, the laminated sheet 1 is punched to obtain a blank plate for the body of the tube container, and the left and right side portions of the blank plate are overlapped and heat-bonded to each other, whereby the blank is obtained. The low density polyethylene resin film 6 side of the plate is the inner peripheral layer, diameter 35mm, height 150m
A cylinder of m 2 was molded.

Thereafter, the cylindrical body is attached to a mandrel for forming a tube container, and one end of the cylindrical body is formed with a truncated cone-shaped shoulder portion and a neck-neck portion of a narrow neck continuous with the shoulder portion. An extruded tube, which is one embodiment of the present invention, having a schematic shape as indicated by reference numeral 8 in FIG. 2, in which the head portion is molded by injection molding with a linear medium density polyethylene resin “melting temperature: 125 ° C.” resin. I got a container.

Example 2 During the manufacturing process of the laminated sheet 1 of Example 1, the thickness 1
A biaxially stretched polyester film having a thickness of 12 μ is used in place of the PVA film 2 having a thickness of 5 μ, and a thickness of 130 μ is used.
80 μm thick block random block polypropylene resin (melting temperature 160 ° C.) film is used in place of the linear medium density polyethylene films 6 and 7 of FIG. The head part consisting of the mouth and neck is molded of polypropylene resin [melting temperature: 135 ° C.], and the other steps are the same as the corresponding steps in Example 1 and laminated for the transparent tube container body. Got the sheet. The water vapor permeability of the barrier film 4 made of a biaxially stretched polyester film having a vacuum deposition layer of silicon oxide is 0.9.
g / m ² · 24 hr (40 ° C, 90% RH), oxygen permeability is 1.0 cc / m ² · 24 hr (1 atm, 2
0 ° C., dry).

Subsequently, using this laminated sheet for the body of the tube container, the same process as the molding process of the extruded tube container in Example 1 was carried out to obtain an extruded tube container which is another embodiment of the present invention. It was

[Experiment] The sealed tube container obtained by enclosing the strawberry jam inside the extruded tube container obtained in Example 1 was subjected to boiling treatment with hot water at 95 ° C. for 30 minutes, and no abnormality occurred. It was

The extruded tube container obtained in Example 2 was sealed with a strawberry jam inside a sealed tube container.
21 ℃, 20 minutes retort treatment, 135 ℃, 2
When the retort treatment was performed for 0 minutes, no abnormality occurred in any case.

[0025]

INDUSTRIAL APPLICABILITY The extruded tube container of the present invention has an appealing effect at the time of display because the inner filler can be seen from the outside of the tube container, and the remaining amount of the inner filler can be confirmed and the inner filler can be confirmed. Since the product type can be checked from the outside, it gives a sense of security to consumers and makes it a tube container of high practical value.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a laminated sheet formed in a body part of an extruded tube container of the present invention.

FIG. 2 is a perspective view showing a schematic shape of an extruded tube container of the present invention.

[Explanation of symbols]

1 Laminated sheet for forming container body 4 Barrier layer made of silicon oxide vapor deposition film 6 Back layer 7 surface layer 8 Extruded tube container

Claims (2)

[Claims] 1. The tube container body is 110 ° C.
Between the surface layer made of the transparent heat-sealing resin layer having the above melting temperature, the back layer made of the transparent heat-sealing resin layer also having the melting temperature of 110 ° C. or more, and between the surface layer and the back layer. Located at 2.0 g / m ² ·
Water vapor permeability below 24 hr (40 ° C, 90% RH) and 2.0 cc / m ² · 24 hr (1 atm, 20 ° C, dr
y) A laminated sheet composed of a transparent barrier layer satisfying at least any one of the following oxygen permeabilities and formed so that the back surface layer of the laminated sheet becomes the body inner peripheral surface layer, and A head composed of a frustoconical shoulder portion that is heat-sealed to the inner peripheral surface of the container body at the open end edge of the tube container body and a neck-neck portion of a thin neck continuous to the shoulder part is 110 ° C or higher. An extruded tube container characterized by being molded from a thermoplastic resin having a melting temperature. 2. The extruded tube container according to claim 1, wherein the transparent barrier layer is subjected to a cosmetic treatment by printing.