JP2979052B2 - Tube container - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a tube container for filling pastes such as foods, medicines, daily necessities and the like containing a fragrance of terpene hydrocarbon or vegetable oil as an aromatic component. It is about.

"Prior art" A tube container for filling an object-semi-fluid filling material typified by a paste-like material includes a tube-shaped container body having a closed lower end, and a tube-shaped container body. A shoulder continuous with the upper end, a mouth and neck continuous with the shoulder,
And a cap that is detachably engaged with the mouth and neck. Particularly in the case of a tube container into which an anaerobic filling material is filled, the container has characteristics excellent in gas barrier properties. For example, a tube container provided with a container body made of a metal or a container body made of a laminated sheet of a polyolefin-based resin layer and a metal foil is used.

"Problems to be Solved by the Invention" By the way, in the tube container having the conventional metal container body, although properties excellent in gas barrier properties can be obtained due to the properties of the material of the container body, Depending on the type of filling material to be filled in the container, the metal that is the material of the container body is corroded, which may cause pinholes in the container body, or the tube may be pushed out by squeezing out the tube. Due to the structure of the container, because the container body is formed of extremely thin metal, the mechanical properties of the container body are poor, for example, when filling a filler or handling a tube container by a consumer, There is a disadvantage that the container body is easily broken.

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 resin layer is used because the polyolefin-based resin layer, which is the inner peripheral surface layer of the container body, has heat sealing properties. For example 80
~ 100μ or more thickness, so that there is a problem in quality retention characteristics due to the fact that the inner peripheral surface layer of the container body absorbs the flavoring and active ingredients in the filling. ing.

In contrast, the present invention is particularly applicable to foods containing fragrances and vegetable oils such as terpene hydrocarbons, vegetable oils, and even pastes such as daily necessities in which dyes are mixed. The flavor component and the active ingredient in the filling are not absorbed by the inner peripheral layer of the container body, and the heat welding characteristics of the inner peripheral layer of the container body are not reduced, and The present invention provides a sanitary tube container in which the filling in the tube container does not come into contact with the end surface of the intermediate layer in the laminated sheet for a tube container, thereby maintaining good quality characteristics of the filling. It is.

"Means for Solving the Problems" The above-mentioned problems are solved by a tube container for a paste containing an aroma component of the present invention described below (hereinafter simply referred to as a tube container of the present invention).

That is, the tube container of the present invention has a tubular container body whose lower end is closed, a shoulder that is continuous with the upper end of the tubular container body, and a continuous with the shoulder. A mouth and neck, and a tube container comprising a cap detachably engaged with the mouth and neck, the tubular container body is a surface layer of a polyolefin resin, and an intermediate layer having gas barrier properties, A side sticking portion formed by overlapping side portions of a laminated sheet for a tube container composed of a back layer with a sealant resin layer and a contact portion between the surface layer and the back layer of the laminated sheet is thermally bonded. The resin layer for a sealant is formed of a cylindrical body formed so as to form an inner peripheral surface layer, and the resin layer for a sealant is a first layer of a polyolefin resin when viewed from an intermediate layer side having gas barrier properties.
And a multi-layer co-extruded laminated resin film layer having a thickness of 30 μm or less made of a resin layer / second resin layer having gas barrier properties / polyolefin resin, and In the body sticking part of the part,
An end face of a side portion of the laminated sheet located on the inner peripheral surface side of the container body is covered with a resin flowing from a surface layer of a polyolefin-based resin and a resin layer for a sealant, and at the shoulder portion. Polyolefin resin layer (a) / gas barrier layer / thickness 30μ
A laminate having the following three-layer structure of the polyolefin-based resin layer (b) is laminated such that the polyolefin-based resin layer (b) in the laminate is located on the inner peripheral side of the container.

In the tube container of the present invention having the above-described configuration, the laminated sheet for the tube container forming the tube-shaped container body includes a first resin layer made of a polyolefin resin.
A multi-layer co-extruded laminated resin film layer comprising a second resin layer having a gas barrier property / a third resin layer having a thickness of 30 μm or less made of a polyolefin resin is provided as a resin layer for a sealant. A co-extruded laminated resin film formed in advance as a resin layer is used.

The second resin layer having the gas barrier property in the sealant resin layer is preferably made of an ethylene-vinyl alcohol copolymer resin, a vinylidene chloride resin, or a polyamide resin.

The third resin layer in the sealant resin layer is preferably made of high-density polyethylene or polypropylene resin.

Further, the third resin layer in the sealant resin layer is preferably made of a polyethylene resin having a carboxyl group.

Further, in the intermediate layer having gas barrier properties in the laminated sheet for a tube container forming the tubular container body, at least a carboxyl group-containing polyethylene resin layer / aluminum foil / carboxyl group is provided. It is preferable to include a three-layer component comprising a polyethylene-based resin layer, but include a gas barrier layer comprising an aluminum foil, an ethylene-vinyl alcohol copolymer resin layer, a polyamide resin layer, a vinylidene chloride resin layer, and the like. It just needs to be.

The surface layer of the laminated sheet forming the container body of the tube container of the present invention is made of a polyolefin-based resin layer, for example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene-vinyl acetate copolymer. It can be formed of a polyethylene resin such as coalesce, ionomer, ethylene-acrylic acid copolymer, or a polypropylene resin, but a low-density polyethylene resin is most preferable.

The intermediate layer of the laminated sheet forming the container body of this tube container, in order to provide rigidity and a design effect by printing by the intermediate layer, a base resin film subjected to back printing, for example, A laminate or the like is used in which a base film such as a biaxially stretched polyester film, a biaxially stretched polypropylene film, a biaxially stretched polyamide film, and the above-mentioned gas barrier layer are laminated via a polyolefin-based resin layer.

Then, the laminate forming the intermediate layer is further laminated via a polyolefin-based resin layer with respect to the multilayer co-extruded laminated resin film layer constituting the resin layer for the sealant, and laminated with the intermediate layer and the resin layer for the sealant. To the body.

The backside layer of the laminated sheet forming the container body, that is, the multilayer co-extruded laminated resin film layer forming the resin layer for the sealant is a first resin layer of a polyolefin resin.
A multi-layer co-extruded laminated resin film comprising a second resin layer having a gas barrier property / a third resin layer having a thickness of 30 μm or less made of a polyolefin-based resin; The second resin layer having a barrier property is made of, for example, an ethylene-vinyl alcohol copolymer resin, a polyamide resin, a vinyldene chloride resin, or the like.

The first resin layer and the third resin layer in the multilayer co-extruded laminated resin film layer, and the base resin film in the intermediate layer of the laminated sheet forming the container body described above and the gas barrier property. For example, a low-density polyolefin-based resin layer interposed between the resin layer and a polyolefin-based resin layer interposed between an intermediate layer and a resin layer for a sealant composed of a multilayer co-extruded laminated resin film. Polyethylene, medium density polyethylene, high density polyethylene,
A polyethylene resin such as an ethylene-vinyl acetate copolymer, an ionomer, and an ethylene-acrylic acid copolymer, or a polypropylene resin is used.

In particular, when the gas barrier layer in the intermediate layer is formed of aluminum foil, for example, a base resin film on which back printing has been performed, specifically, a biaxially oriented polyester film, a biaxially oriented polypropylene film, 2
A base film such as an axially stretched polyamide film and an aluminum foil, and a multi-layer co-extruded laminated resin film forming an aluminum foil and a back surface layer are each formed of a resin layer of a polyolefin resin having a carboxyl group, for example, ethylene- (meth) acrylic. It is preferable to laminate via a resin layer of an acid copolymer or the like.

The third resin layer in the multilayer co-extruded laminated resin film layer forming the back layer of the laminated sheet forming the container body forms the inner peripheral surface layer of the tubular container body formed by the laminated sheet. Things. Therefore, it is necessary to form a film having a thickness of 30 μ or less so as to minimize the adsorption performance of the flavoring component contained in the filling contained in the tube container. Any material, for example, a high-density polyethylene or polyethylene resin having a thickness of 20 μm or less is more preferable.

The container body of the tube container of the present invention is formed by laminating a laminated sheet for a tube container comprising a surface layer made of the above-mentioned polyolefin resin, an intermediate layer having gas barrier properties, and a back layer made of a sealant resin layer. The sides of the sheet are overlapped with each other, and the body sticking portion formed by thermally bonding the contact portion between the surface layer and the back surface layer of the laminated sheet, so that the resin layer for the sealant forms the inner peripheral surface layer It is made of a molded cylindrical body, and at the body sticking portion of the container body,
As shown in the figure, the end face of the side portion of the laminated sheet located on the inner peripheral surface side of the container body is covered with a resin flowing from a surface layer of a polyolefin resin and a sealant resin layer. It is.

The tubular body forming the container body of the tube container overlaps one side and the other side of the laminated sheet for the tube container, and the surface layer and the back surface layer of the laminated sheet in the overlapped portion Can be easily obtained by thermally bonding the abutting portions. Further, the tube container according to the present invention may further comprise a tubular container body, a shoulder continuous with an upper end portion of the tubular container body, a mouth and neck connected to the shoulder, A cap that is detachably engaged with the neck, and after the tubular body, which is a tubular container body, is mounted on a mandrel, one end of the tubular body is, for example, a polyolefin-based By performing injection molding of resin etc.,
The shoulder and the mouth and neck can be easily formed.

When the tube container of the present invention is formed, the tubular body that is the tubular container body is attached to the mandrel, and a separate laminated body is attached to the mandrel, that is, the inside of the container at the shoulder of the tube container. A laminate to be laminated on the peripheral surface is also mounted in advance, and a shoulder and a mouth and neck are injection-molded at one end of the tubular body mounted on the mandrel.

The laminate to be laminated on the inner peripheral side of the shoulder portion of the tube container of the present invention is composed of a polyolefin resin layer (a) / a gas barrier layer / a polyolefin resin layer (b) having a thickness of 30 μ or less.
The tube container is a laminate having a layer structure, that is, a film or sheet having a three-layer structure, or a molded product, wherein the polyolefin resin layer (b) in the laminate is on the inner peripheral surface side of the container. Are laminated on the inner peripheral surface side of the shoulder.

In the laminate laminated on the inner peripheral surface side of the container at the shoulder portion of the tube container, the polyolefin resin layers (a) and (b) have the polyolefin in the laminated sheet forming the container body described above. The same resin as described for the base resin layer, and the same gas for the gas barrier layer as described for the intermediate layer having gas barrier properties in the laminated sheet forming the container body described above. A barrier resin or aluminum foil is used.

Further, in the laminated body laminated on the inner peripheral surface side of the shoulder of the tube container, the polyolefin-based resin layer (b) forms the inner peripheral layer of the tube container.
Therefore, it is formed to a thickness of 30 μm or less so as to minimize the adsorbing performance of the flavoring component contained in the filling contained in the tube container.

"Example" Hereinafter, a specific configuration of the tube container of the present invention will be described with a production example.

Example 1 In FIG. 1, a biaxially stretched polyester film “ester film E510” having a thickness of 12 μm and having back-printed prints m and m is shown.
0: Toyobo 2 and a low-density polyethylene “Mirason 16P: Mitsui Petrochemical Industry” film 3 having a thickness of 40μ are bonded together via an isocyanate-based anchor coating agent, and ethylene-methacrylic acid having a thickness of 40μ is further bonded. Through the copolymer resin “Nucrel 0910c: DuPont Mitsui Polychemical” layer 4, a thickness of 20 μm is applied to the surface of the low-density polyethylene film 3.
By laminating the above aluminum foils, a laminated sheet used for the intermediate layer was obtained.

Next, 2 in the laminated sheet used for the intermediate layer
A surface layer 6 composed of a 50 μm-thick low-density polyethylene “Mirason 16P: Mitsui Petrochemical Industry” layer is laminated on two axially stretched polyester films via an isocyanate-based anchor coating agent. , A 40μ thick ethylene-methacrylic acid copolymer resin
10c: A laminated sheet 1 for a tube container was obtained by laminating and laminating a resin layer (back surface layer) 8 for a sealant made of a multilayer co-extruded laminated resin film via a “Mitsui DuPont Polychemical” layer 7.

The sealant resin layer 8 composed of the multilayer co-extruded laminated resin film is a low-density polyethylene resin “Mirason 16P: Mitsui Petrochemical Industry” layer (20 μ) / adhesive polyolefin resin “Admer AT: Mitsui Petrochemical Industry” Layer (10μ) / Ethylene-vinyl alcohol copolymer resin “EVAL E: Nippon Gohsei” layer (10μ) / Adhesive polyolefin resin “Admer AT: Mitsui Petrochemical Industry” layer (1
0μ) / Low density polyethylene resin “Mirason 16P: Mitsui Petrochemical Industries” layer (20μ).

Subsequently, a blank plate obtained by stamping out the laminated sheet 1 for a tube container was used, and the resin layer 8 for a sealant of the laminated sheet 1 was 35 mm in diameter as an inner peripheral surface layer.
The cylindrical body 10 having a height of 150 mm was formed by overlapping the left and right side portions of the plank plate and thermally bonding the contact portions.

Next, the cylindrical body 10 is attached to a mandrel,
After the lamination sheet [1] having the following lamination structure is attached to the mandrel portion corresponding to the shoulder portion to be formed in the subsequent step, that is, continuously to one end of the cylinder body 10, the lamination sheet of the cylinder body 10 is formed. At the end on the side where [1] is mounted, a frusto-conical shoulder 11 and a narrow neck mouth-and-neck portion connected to it
12 is molded by injection molding of a low-density polyethylene resin "Mirason 16P: Mitsui Petrochemical Industry", and the tube container precursor in which the laminated sheet [1] is laminated on the inner peripheral surface side of the container of the shoulder portion 11 is formed. Obtained.

Laminated sheet [1] Low density polyethylene resin "Mirason 16P" layer (20μ)
/ Isocyanate adhesive layer / Aluminum foil (20μ)
/ Isocyanate adhesive layer / Low density polyethylene resin "Mirason 16P" layer (20μ) Then, the mouth and neck of the narrow neck of the tube container precursor
12 is sealed with a sealing material, and 200 g of an orange fruit sauce is filled from the lower end of the cylindrical body 10, and then a heat-welded portion 13 is formed at the lower end of the cylindrical body 10, as shown in FIG. A tube container denoted by reference numeral 14 and being a product of one embodiment of the present invention was obtained.

(Comparative Example 1) The back layer of the laminated sheet 1 for a tube container used in Example 1 above, that is, a portion corresponding to the sealant resin layer 8 made of a multilayer co-extruded laminated resin film has a thickness of 70
Except for the low-density polyethylene resin “Mirason 16P” layer, a laminated sheet for a tube container having the same laminated structure as the laminated sheet 1 for a tube container is used, and the container at the shoulder of the tube container is used. A comparative tube container filled with 200 g of orange fruit sauce was obtained by the same process as in Example 1 except that the laminated sheet [1] was not laminated on the inner peripheral surface side. Was.

(Experiment) Each of the tube containers of Example 1 and Comparative Example 1 was heated at 37 ° C.
After storing for 1 month at, a sensory test of the taste and aroma of the orange fruit sauce in the tube container was performed.

The orange fruit sauce in the tube container of Example 1 retained the scent and taste of orange, but the orange fruit sauce in the tube container of Comparative Example 1 scarcely remained orange scent.

"Operation and Effect of the Invention" The tube container of the present invention is such that the tubular container body in the tube container has a surface layer made of a polyolefin resin, an intermediate layer having gas barrier properties, and a back layer made of a resin layer for a sealant. The inner peripheral surface layer is a back layer of the laminated sheet, that is, a first resin layer of a polyolefin resin / a second resin layer having gas barrier properties / It is formed of a multilayer co-extruded laminated resin film layer having a third resin layer having a thickness of 30 μ or less made of a polyolefin resin, and the innermost peripheral surface layer of the tube-shaped container body is formed of the multilayer co-extruded laminated layer. The resin film layer comprises a third resin layer having a thickness of 30 μm or less made of a polyolefin resin.

Therefore, in the tube container of the present invention, the tubular container body in the tube container has a thickness of the first resin layer of the polyolefin resin / the second resin layer having gas barrier properties / the thickness of the polyolefin resin. It consists of a molded article in which a multilayer coextruded laminated resin film layer having a third resin layer of 30 μm or less is used as a sealant resin layer.

Therefore, despite the fact that the thickness of the third resin layer made of the polyolefin resin which is in direct contact with the filling in the tube container is kept as small as 30 μm or less, the polyolefin resin is used as the sealant resin layer. Use of a preformed multilayer co-extruded laminated resin film layer having a first resin layer / a second resin layer having gas barrier properties / a third resin layer having a thickness of 30 μm or less made of a polyolefin resin. Therefore, the heat bonding ability of the resin layer for the sealant does not decrease.

The thickness of the third resin layer of the sealant resin layer is suppressed to 30 μm or less, and a second resin layer having gas barrier properties is laminated on the outer surface side of the container with respect to the third resin layer. Because of this, the third resin layer of the polyolefin resin that is in direct contact with the filling in the tube container can suppress the adsorption performance and permeation performance of the flavoring component in the filling in the tube container extremely low.

Further, the container body of the tube container according to the present invention has a side layer formed of a surface layer made of a polyolefin resin, an intermediate layer having gas barrier properties, and a back layer made of a resin layer for a sealant. Are superimposed, and a body sticking portion formed by thermally bonding the contact portion between the front surface layer and the back surface layer of the laminated sheet is formed from a cylindrical body formed such that the sealant resin layer forms an inner peripheral surface layer. In addition, in the body sticking portion of the container body, the end face of the side portion of the laminated sheet located on the inner peripheral surface side of the container body flowed from the surface layer of the polyolefin resin and the resin layer for the sealant. It is covered with resin.

For this reason, even if a metal foil such as an aluminum foil is laminated on the intermediate layer in the laminated sheet for forming the container body, the end surface of the intermediate layer is exposed on the inner peripheral surface side of the container body. Therefore, it is a tube container having an excellent action in hygiene characteristics.

That is, in the body sticking part of the container body part of the tube container of the present invention, the surface layer and the back surface layer of the laminated sheet for the tube container have excellent properties in the heat-pressure bonding property, and the third property is obtained. As shown in the figure, a resin for a sealant forming the back layer of the laminated sheet located on the outer peripheral side of the container body, and a polyolefin resin constituting the surface layer of the laminated sheet located on the inner peripheral side of the container body Are flowing, and the end surface of the laminated sheet located on the inner peripheral surface side of the container body is covered with the above-described resin.

Thereby, the filler in the tube container is not contaminated by the aluminum foil or the like laminated in the laminated sheet for forming the container body, and the aluminum foil or the like existing near the end face of the laminated sheet Does not cause a decrease in the adhesive strength of the body sticking portion, and is a good thermal bonding portion.

Further, the tube container of the present invention has a three-layer structure of a polyolefin-based resin layer (a) / a gas barrier layer / a polyolefin-based resin layer (b) having a thickness of 30 μ or less on a shoulder inner peripheral surface side of the tube container. Are laminated such that the polyolefin-based resin (b) in the laminate is on the inner peripheral surface side of the container.

Therefore, in the tube container of the present invention, the resin layer in direct contact with the filler in the tube container also has a thickness of 30 μm or less at the shoulder of the tube container, similarly to the tubular container body. A resin layer (b) is formed, and a gas barrier layer is laminated on the outer side of the container of the polyolefin resin layer (b), so that the polyolefin resin layer is in direct contact with the filling in the tube container. The adsorption performance and permeation performance of the flavoring component in the filling in the tube container according to (b) are extremely low.

Thus, the tube container of the present invention has a very excellent effect on the flavor retention properties, and the vegetable oil retention properties,
Moreover, since it has a body sticking portion formed by a good heat-bonding portion, for example, a food containing an orange jam, a lemon essence, a toothpaste, shoe polish, a hair dye, particularly a fragrance or vegetable oil of a terpene hydrocarbon, etc. It is a sanitary tube container in which a paste containing a mixture of a drug, a dye and the like can be stored very well.

[Brief description of the drawings]

FIG. 1 is a model sectional view showing one embodiment of a laminated sheet for a tube container for forming a container body in a tube container of the present invention, and FIG. 2 is an embodiment of a tube container of the present invention. FIG. 3 is a front view showing the product, and FIG. 3 is a model cross-sectional view showing the state of the body sticking portion of the container body made of the laminated sheet for the tube container shown in FIG. DESCRIPTION OF SYMBOLS 1 ... Laminated sheet for tube container for forming container body 5 ... Aluminum foil forming gas barrier layer 6 ... Surface layer 8 ... Resin layer for sealant (back surface layer) 9 ... Intermediate layer 10 …… Cylindrical body (tube-shaped container body) 11… Shoulder 12… Mouth and neck 14 …… Tube container

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-312143 (JP, A) JP-A-54-95678 (JP, A) JP-A-55-71267 (JP, A) 191526 (JP, U) Japanese Patent Publication 55-13987 (JP, B2) Japanese Utility Model Publication 60-28588 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B32B 27/32

Claims (5)

(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 removably engaged with the mouth and neck, the tube-shaped container body includes a surface layer made of a polyolefin resin, an intermediate layer having gas barrier properties, and a resin layer for a sealant. A side sticking portion formed by superimposing side portions of a laminated sheet for a tube container having a back surface layer with each other and thermally bonding a contact portion between the surface layer and the back surface layer of the laminated sheet is formed of the sealant resin layer. Is a cylindrical body formed so as to form an inner peripheral surface layer. The resin layer for sealant is a first resin layer of a polyolefin resin / gas barrier property when viewed from an intermediate layer side having gas barrier property. The second with It is formed of a multi-layer co-extruded laminated resin film layer having a third resin layer having a thickness of 30 μm or less made of a resin layer / polyolefin resin. The end face of the side portion of the laminated sheet located on the inner peripheral surface side is covered with a resin flowing from a surface layer of a polyolefin resin and a resin layer for a sealant, and the inner peripheral surface of the container at the shoulder portion On the side, the polyolefin resin layer (a) /
A laminate having a three-layer structure of a gas barrier layer / a polyolefin resin layer (b) having a thickness of 30 μ or less is laminated such that the polyolefin resin layer (b) in the laminate is on the inner peripheral surface side of the container. A tube container for a paste-like substance containing an aromatic component, which is characterized in that: A second resin layer having a gas barrier property in the resin layer for a sealant in the laminated sheet for a tube container, which is formed of an ethylene-vinyl alcohol copolymer resin, a vinylidene chloride resin, or a polyamide resin. The tube container according to claim 1, wherein: 3. The resin sheet according to claim 1, wherein the third resin layer of the polyolefin resin in the resin layer for the sealant in the laminated sheet for a tube container is formed of a high-density polyethylene or polypropylene resin.
Item 8. The tube container according to item 1. 4. The method according to claim 1, wherein the first resin layer in the resin layer for the sealant in the laminated sheet for a tube container is formed of a polyethylene resin having a carboxyl group. The tube container according to any one of the above. 5. A three-layer structure comprising at least a carboxyl group-containing polyethylene resin layer / aluminum foil / a carboxyl group-containing polyethylene resin layer in an intermediate layer having gas barrier properties in a laminated sheet for a tube container. Claims 1 to 3 including the configuration
The tube container according to any one of items 4 to 10.