JP2873461B2 - Tube container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial application field" The present invention relates to pastes such as foods and pharmaceuticals containing fragrances and vegetable oils by terpene hydrocarbons, and daily necessities mixed with dyes. The present invention relates to a tube container suitable for filling an object, and has an extremely good preservation performance of the inside material, and has an adhesive strength of a sealing portion of a container body or a joining portion between a container body and a shoulder. It is an object of the present invention to provide a tube container which is high and has extremely high transparency of a container body, and which allows the contents inside the container to be easily visually recognized from the outside.

“Prior art” A tube container in which a fluid-semi-fluid filling material represented by a paste-like material is filled, a tube-shaped container body whose lower end is closed, and the tube-shaped container It is formed of a shoulder continuous with the upper end of the torso, a mouth and neck continuous with the shoulder, and a cap removably engaged with the mouth and neck.

In particular, in the case of a tube container which is required to have excellent gas barrier properties, such as a tube container in which an anaerobic filling is filled, for example, a metal container body or a polyolefin resin A tube container having a container body or the like made of a laminated sheet of a layer and a metal foil is used.

"Problems to be Solved by the Invention" By the way, the tube container having the conventional metal container body has excellent gas barrier properties due to the properties of the material of the container body, but is filled in the container. Depending on the type of filling to be performed, metal as a material of the container body is corroded, which causes pinholes in the container body. In addition, the mechanical properties of the container body are poor due to the use of extremely thin metal foil due to the structure of the tube container in which the filling is pushed out by squeezing, for example, when filling the filling or the tube container by the consumer. Has the drawback that the tube-shaped container body tends to be torn during handling.

Further, in a tube container having a container body made of a laminated sheet of a polyolefin-based resin layer and a metal foil, the polyolefin-based resin layer, which is an inner peripheral surface layer of the container body, is filled with a volatile oil or a fragrance. It is easy to be attacked by the material, which may degrade the quality of the filling, and furthermore, the polyolefin-based resin layer absorbs the flavor component and the active ingredient contained in the filling, thereby maintaining the quality. There is also a problem in characteristics.

Further, the tube container utilizing the gas barrier property of the metal material does not allow the contents inside the container to be easily visually recognized from the outside because of the metal portion forming the container body, so that the display effect is reduced. And there is a drawback in that the consumer cannot easily confirm the remaining amount during use of the filling.

In contrast, the present invention is particularly applicable to foods and medicines containing fragrances and vegetable oils of terpene-based hydrocarbons, as well as pastes such as daily necessities mixed with dyes. A tube container that does not degrade the quality characteristics of the filling, has high sealing strength at the sealing portion of the container body or at the junction between the container body and the shoulder, and has extremely high transparency of the container body. To provide.

"Means for Solving the Problems" The tube container of the present invention has a tubular container body having a closed lower end, and a shoulder continuous with the upper end of the tubular container body.
In a tube container comprising a mouth and a neck continuous with the shoulder and a cap detachably engaged with the mouth and neck, a glass transition temperature of the shoulder and the mouth and neck continuous with the shoulder are provided. It is formed of a molded body of a saturated polyester resin having a temperature of 40 ° C. or higher, and the body of the container has a glass transition temperature of 40 ° C. or higher and a crystallinity of 20% or less. Glass transition temperature of 40 degrees or higher, crystallinity of 20
% Or less of a low-crystalline saturated polyester resin and a middle layer of a gas barrier film located between the front layer and the back layer. And a gas barrier film serving as an intermediate layer in the laminated sheet is a biaxially stretched polyethylene terephthalate resin film, a biaxially stretched polyethylene terephthalate resin film having a vinylidene chloride resin coat layer, From any of a biaxially stretched polyamide film having a vinylidene resin coat layer, an ethylene-polyvinyl alcohol copolymer resin film, and a biaxially stretched polyethylene terephthalate resin film having an ethylene-polyvinyl alcohol copolymer resin coat layer Become Things.

In the tube container of the present invention having the above structure, the shoulder portion and the mouth and neck portion of the tube container are an integrally molded body of a saturated polyester resin having a glass transition temperature of 40 ° C. or more made of, for example, polyethylene terephthalate or a resin mainly composed of polyethylene terephthalate. It may be a combined body of individual molded bodies of the shoulder and the mouth and neck, but from the viewpoint of parts management and manufacturing processes, the former integrally molded body is preferable.

As described above, in the tube container of the present invention, the shoulder and the mouth and neck are formed of a saturated polyester resin having a glass transition temperature of 40 ° C. or higher. Excellent perfume-resistant properties similar to the above are exhibited.

Further, the container body in the tube container of the present invention,
As mentioned above, with a glass transition temperature of 40 ° C or higher and a crystallinity of 20%
A surface layer comprising the following low-crystalline saturated polyester resin layer; a back layer also comprising a low-crystalline saturated polyester resin layer having a glass transition temperature of 40 ° C. or more and a crystallinity of 20% or less; And an intermediate layer made of a gas barrier film located between the two.

That is, the tubular container body is obtained by blanking a blank sheet formed by stamping and forming a laminated sheet having the above-described laminated structure, by superimposing the left and right sides thereof, and further heating and pressurizing the superimposed portion. It is formed of a formed cylindrical body.

The surface layer and the back surface layer of the laminated sheet are formed of a saturated polyester resin having a crystallinity of 20% or less (including the case of non-crystallinity), and have excellent properties in heat welding.

In the laminated sheet forming the tube-shaped container body, the surface layer and the back layer made of a low-crystalline saturated polyester resin having a glass transition temperature of 40 ° C. or more and a crystallinity of 20% or less are the thicknesses of these layers. When the particle size is 5 μm or less, the stability of the resin layer is deteriorated, and the sealing performance of the obtained heat-welded portion may be reduced.

If the thickness exceeds 200μ,
The laminated sheet becomes hard, and a container body with a good texture cannot be obtained.

For this reason, it is preferable that each of the front surface layer and the back surface layer in the laminated sheet is formed to a thickness of about 20 to 100 μm.

In addition, the mouth and neck, the shoulder, and the surface layer and the back layer of the laminated sheet formed in the container body are formed of the same type of saturated polyester resin such as polyethylene terephthalate or the same saturated polyester resin. In such a case, the heat-welded portion of the tubular container body and the thermal bonding portion between the tubular container body and the shoulder have a stronger bonding structure.

Low-crystalline saturated polyester resins having a glass transition temperature of 40 ° C. or higher and a crystallinity of 20% or lower, which are used for the front and back layers of the laminated sheet as a material for molding the container body, are, for example, ethylene glycol and propylene glycol. , 1,4-
Alcohol components such as butanediol and 1,4-cyclohexaneditamenol, and dicarboxylic acid components such as aliphatic dicarboxylic acids such as adipic acid and sebacic acid, and aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid and diphenylcarboxylic acid. And specifically, a co-condensation polymer of ethylene glycol with isophthalic acid and terephthalic acid, and a co-condensation polymer of 1,4-cyclohexanedimethanol and ethylene glycol with terephthalic acid. In the case where the surface layer and the back layer are provided with more excellent transparency and strength, a ternary co-condensation polymer of 1,4-cyclohexanedimethanol, ethylene glycol and terephthalic acid is preferred. It is.

In the case of the above-mentioned saturated polyester resin, in the case of a co-condensation polymer in which the aliphatic dicarboxylic acid component in the acid component becomes 10% by weight or more, the perfume resistance due to the saturated polyester resin layer tends to decrease. Is not preferred.

The intermediate layer in the laminated sheet used for the container body is a biaxially oriented polyethylene terephthalate resin film, a biaxially oriented polyethylene terephthalate resin film having a vinylidene chloride resin coating layer, and a biaxially oriented film having a vinylidene chloride resin coating layer. Polyamide film,
Any one of an ethylene-polyvinyl alcohol copolymer resin film and a biaxially stretched polyethylene terephthalate resin film having an ethylene-polyvinyl alcohol copolymer resin coating layer, particularly requiring a high degree of gas barrier properties. When a tube container is used, a biaxially stretched polyamide film having a vinylidene chloride resin coat layer, a biaxially stretched polyester film having a vinylidene chloride resin coat layer, an ethylene-polyvinyl alcohol copolymer resin film, or an ethylene-polyvinyl alcohol copolymer film may be used. It is preferable to use a biaxially stretched polyethylene terephthalate resin film having a polymer resin coat layer.

In addition, when ordinary gas barrier properties are sufficient, it is preferable to use a single film of a biaxially stretched polyester film as the gas barrier layer described above.

"Example" Hereinafter, a specific configuration of the tube container of the present invention will be described based on an illustrated example.

Example 1 In FIGS. 1 and 2, a surface layer 1 having a thickness of 40 μm and a printing layer m, m ‥‥ made of a low-crystalline saturated polyester resin having a glass transition temperature of 40 ° C. or more and a crystallinity of 20% or less. 12 μm thick biaxially stretched polyester film “Ester Film E5100: Toyobo Co., Ltd.” using an intermediate layer 4 and a low-crystalline saturated polyester resin having a glass transition temperature of 40 ° C. or more and a crystallinity of 20% or less. A laminated sheet 6 obtained by bonding and laminating the back surface layer 5 having a thickness of 60 μm with urethane-based two-component curable adhesives S1 and S2 to obtain a laminated sheet 6 is used. , The laminated sheet 6
The cylindrical body 7 having a diameter of 35 mm and a height of 150 mm in which the back surface layer 5 is an inner peripheral surface layer was obtained by overlapping the left and right side portions of the blank plate and thermally bonding them.

The surface layer 1 and the back layer 5 in the laminated sheet 6
Each consist of a resin layer made of an amorphous polyester resin “PET G6763, glass transition temperature: 81 ° C. (manufactured by Eastman Kodak Company)”.

On the other hand, in FIG. 2, the neck and neck 8 of the narrow neck and the neck and neck 8
A head 10 made of an integrally molded body with a truncated conical shoulder 9 continuous with the lower end of the resin is injection-molded with polyethylene terephthalate resin “PET J125, glass transition temperature: 57 ° C. (manufactured by Mitsui Pet Resin Co., Ltd.)”. Molded.

Thereafter, the lower end of the frusto-conical shoulder 9 of the head 10 and the upper end of the cylindrical body 7 are heat-melted and bonded, and the mouth and neck 8 is sealed with a sealing material. Fill with 200g of orange fruit sauce from the lower end of the
Subsequently, the lower end of the cylindrical body 7 is sealed by hot-melt bonding.
By forming 11, a tube container indicated by reference numeral 12 in FIG. 1 was obtained.

Example 2 Instead of the laminated sheet as the material for forming the container body in Example 1, a glass transition temperature of 40 ° C. or more and a crystallinity of 20 were used.
% Of low crystalline saturated polyester resin of 40% or less
And a middle layer of a laminated film having a vinylidene chloride coating layer formed on a biaxially stretched polyester film “Ester Film E5100: Toyobo Co., Ltd.” having a printing layer and a 12 μm-thick biaxially oriented polyester film, and a glass transition temperature of 40 ° C. Above,
Except for using a laminated sheet in which a 60 μm thick back layer made of a low-crystalline saturated polyester resin having a crystallinity of 20% or less is bonded and laminated with a urethane-based two-component curable adhesive, respectively, A tube container having the same configuration as that of Example 1 and filled with 200 g of orange fruit sauce was obtained.

Comparative Example 1 Low-density polyethylene film layer having a thickness of 40 μm “Mirason
16sp: A 12μ thick biaxially stretched polyester film “Ester Film E5100: Toyobo Co., Ltd.” having a surface layer composed of “Mitsui Petrochemical Co., Ltd.” and a printed layer, and a 20μ thick Al
A foil and a urethane-based two-part curable adhesive "Takelac A310-
Taken A3: Takeda Pharmaceutical Co., Ltd.
A laminated sheet in which an intermediate layer formed by laminating and a back layer 5 made of a low-density polyethylene film layer having a thickness of 60 μm “Milason 16sp: Mitsui Petrochemical Co., Ltd.” are each laminated by a urethane-based two-liquid curing adhesive. And a step of superimposing and thermally bonding the left and right side portions of the blank sheet obtained by punching the laminated sheet, thereby forming a backing layer of the laminated sheet having an inner peripheral surface layer having a diameter of 35 mm. , Height 150
mm cylinder was obtained.

On the other hand, a head for comparison was molded by injection molding of a low-density polyethylene resin "Mirason 16sp: Mitsui Petrochemical Co., Ltd."

Hereinafter, a tube container for comparison filled with 200 g of an orange fruit sauce was obtained according to the method of Example 1 described above.

Experiment 1 The tube containers of Examples 1 and 2 and the tube container of Comparative Example 1 were compared for the display effect of the external appearance,
The tube container of the example product had a transparent feeling and was excellent in display effect, but the tube container of the comparative example product lacked sharpness and the display effect was poor.

Experiment 2 Each of the tube containers obtained in Examples 1 to 2 and Comparative Example 1 was stored at a room temperature of 20 ° C. for one month, and then the taste and aroma of the orange fruit sauce contained therein were sensory tested. As a result, the aroma and taste of orange were maintained in the filling in the tube container of the example product, but the aroma of orange hardly remained in the filling in the tube container of the comparative example product Was.

Further, after each tube container was washed after being cut, the odor of the inner peripheral layer of each tube container was examined. The inside of the tube container of the example product was almost odorless, but the inside of the tube container of the comparative example product was not. It was confirmed that orange aroma remained, and that the aroma of the orange fruit sauce was adsorbed to the inner peripheral layer of the tube container.

"Operation and Effect of the Invention" The tube container of the present invention comprises: a tubular container body having a closed lower end; and a shoulder continuous with the upper end of the tubular container body.
In a tube container comprising a mouth and a neck continuous with the shoulder and a cap detachably engaged with the mouth and neck, a glass transition temperature of the shoulder and the mouth and neck continuous with the shoulder are provided. It is formed of a molded body of a saturated polyester resin having a temperature of 40 ° C. or higher, and the body of the container has a glass transition temperature of 40 ° C. or higher and a crystallinity of 20% or less. Glass transition temperature 40 ° C or higher, crystallinity 20
% Or less of a low-crystalline saturated polyester resin and a middle layer of a gas barrier film located between the front layer and the back layer. And a gas barrier film as an intermediate layer in the laminated sheet is a biaxially stretched polyethylene terephthalate resin film, a biaxially stretched polyethylene terephthalate resin film having a vinylidene chloride resin coat layer, Any one of a biaxially stretched polyamide film having a vinylidene resin coat layer, an ethylene-polyvinyl alcohol copolymer resin film, and a biaxially stretched polyethylene terephthalate resin film having an ethylene-polyvinyl alcohol copolymer resin coat layer Become Things.

However, in the tube container of the present invention, the inner peripheral surface layer of the container body is made of a saturated polyester resin layer having a glass transition temperature of 40 ° C. or higher, and the shoulder and the mouth and neck portion connected to the shoulder are the same. Since it is formed of a molded body of a saturated polyester resin with a glass transition temperature of 40 ° C or higher, it can be used not only in the body of the container but also in the shoulder and the mouth and neck, in an atmosphere at a temperature lower than the glass transition temperature of the saturated polyester resin. Perfume resistance properties,
And extremely good vegetable oil retention properties, such as orange jam, lemon essence, toothpaste,
When filling in pastes such as shoes and hair dyes, especially foods and medicines containing fragrances and vegetable oils from terpene hydrocarbons, and daily necessities mixed with dyes, It does not degrade the quality characteristics of the filling and has an extremely excellent effect on the storage performance.

Further, in the tube container of the present invention, since the surface layer and the back surface layer of the tube-shaped container body are each composed of a low-crystalline saturated polyester resin layer having a crystallinity of 20% or less,
The heat-sealed sealing portion having high adhesive strength in the tubular container body can be stably formed under mild heat-pressure bonding conditions such as 120 to 160 ° C.

In the tube container of the present invention, the surface layer and the back layer of the tube-shaped container body have properties excellent in the heat-pressure bonding property as described above, so that the tube-shaped container is formed. As shown in FIG. 3, the backside layer 5 of the laminated sheet located on the outer peripheral surface side of the torso is provided on the torso adhering portion of the torso.
And the saturated polyester resin forming the surface layer 1 and the back layer 5 of the laminated sheet located on the inner peripheral surface side of the body portion flow, and the saturated polyester resin is formed on the end surface of the laminated sheet located on the inner peripheral surface side of the trunk portion. A resin coating layer is formed.

Further, the tube container of the present invention has the inner peripheral layer and the shoulder portion of the tube-shaped container body made of the same type of resin as a saturated polyester resin. The part becomes strong.

In addition, the tube container of the present invention has a very high transparency in the container body and allows the contents inside the container to be easily visually recognized from the outside. It is possible to easily confirm the remaining amount of the substance.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of the tube container of the present invention, and FIG. 2 is a model sectional view showing one embodiment of the laminated sheet used for the container body of the tube container of the present invention. FIG. 3 is a model sectional view showing a state of a body sticking portion of a container body made of the laminated sheet shown in FIG. 1: Surface layer 4: Intermediate layer 5: Back layer 6: Laminated sheet for container body molding 7: Cylindrical body (tube-shaped container body) 8: Neck and neck 9: Shoulder 12: Tube container

Claims (1)

(57) [Claims] 1. A tubular container body having a closed lower end, a shoulder connected to an upper end of the tubular container body, and a mouth and neck connected to the shoulder. In a tube container comprising a cap detachably engaged with the mouth and neck, the shoulder and the mouth and neck continuous with the shoulder are formed of a saturated polyester resin having a glass transition temperature of 40 ° C. or higher. The container body has a surface layer made of a low-crystalline saturated polyester resin having a glass transition temperature of 40 ° C. or more and a crystallinity of 20% or less, and a glass layer having a glass transition temperature of 40 ° C. or more. 20%
A back layer of the following low-crystalline saturated polyester resin,
A laminated sheet of a gas barrier film and an intermediate layer located between the surface layer and the back layer, wherein the laminated sheet is formed such that the back layer is an inner peripheral layer of the container; The gas barrier film as an intermediate layer in the sheet has a biaxially stretched polyethylene terephthalate resin film and a vinylidene chloride resin coat layer.
Axial stretched polyethylene terephthalate resin film, biaxially stretched polyamide film having a vinylidene chloride resin coat layer, ethylene-polyvinyl alcohol copolymer resin film, and biaxially stretched polyethylene terephthalate resin film having an ethylene-polyvinyl alcohol copolymer resin coat layer A tube container, which is any one of the above films.