JPH06166107A - Barrel part of tubular vessel - Google Patents

Abstract

PURPOSE:To provide the barrel part of a tubular vessel which has a good property for the quality maintaing characteristics of a packed material because the end faces of a laminated sheet are not exposed to its inside and enables an end seal part to be molded stably when a sealed tubular vessel is made because the back sticking part is flush. CONSTITUTION:The barerel part of a tubular vessel in which a back sticking part 3 is formed with the butting part A consisting of the end face of one side part 9 and the end face of the other side part of a laminated sheet 8 and a seal tape 4 which is stuck on the surface of the inside wall of a cylindrical molded body in the butting part A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube container body made of a tubular molded body formed of laminated sheets.

[0002]

2. Description of the Related Art In a body part of a tube container made of a laminated sheet, one side part of a laminated sheet for forming a body part having at least a surface resin layer and a back surface resin layer is overlapped with the other side part.
A cylindrical molded body obtained by welding a front surface resin layer on a side portion and a back surface resin layer on the other side portion to form a back-bonded portion is used.

[0003]

The tube container body formed of the above-mentioned laminated sheet has the other side portion superposed on the one side portion of the laminated sheet, and the surface resin layer of the one side portion and the other side portion. In the back sticking part, which is the container body sticking part formed by welding the back surface resin layer of the side part, the end surface of the side side part of the laminated sheet located on the inner surface side of the container comes into contact with the inner filling in the tube container.

For this reason, when, for example, an aluminum foil or an ethylene-vinyl alcohol copolymer resin layer as a gas barrier layer is laminated in the laminated sheet, these layers come into contact with the internal filler. However, the quality of the filling material may be deteriorated, or the gas barrier of the laminated sheet may be deteriorated.

That is, when aluminum foil is laminated in the laminated sheet forming the tube container body, when the acid or alkaline substance is filled in the tube container body, the inner surface side of the container body The aluminum exposed on the end faces of the side edges of the laminated sheet located at is eluted into the inner filling in the tube container, and the flavor of the inner filling is impaired.

When the ethylene-vinyl alcohol copolymer resin layer is laminated in the laminated sheet forming the body of the tube container, the side edges of the laminated sheet located on the inner surface side of the container body The ethylene-vinyl alcohol copolymer resin layer exposed on the end surface of the portion absorbs moisture in the body of the tube container, impairing the gas barrier function of the laminated sheet.

Further, when the polyolefin resin layer is laminated in the laminated sheet, when the inner filler containing a substance having high permeability such as a flavor component is filled in the body of the tube container, Highly permeable substances are absorbed and adsorbed by the polyolefin resin layer, which has the drawback of deteriorating the quality of the internal filler.

Therefore, as shown in [FIG. 4], the heat-sealing resin layer H, which becomes the inner peripheral surface layer of the tubular molded body when forming the body-bonding portion of the tubular molded body with the laminated sheet. The end face of the laminated sheet is coated with the resin forming the heat-sealing resin layer H by the flow of No. 1, but in particular, a resin having a high melting temperature and low fluidity at the time of heat melting, for example, a gas. When a nitrile resin described in JP-B-57-60234 is used as a heat-sealing resin layer having excellent barrier properties as a heat-sealing resin layer, the end surface of the laminated sheet is treated with the heat-sealing resin. It often happens that it cannot be completely covered.

In addition, a back adhesive portion formed by stacking the other side portion on one side portion of the laminated sheet and fusing the front surface resin layer of the one side portion and the back surface resin layer of the other side portion to each other is welded. The cylindrical molded body has a thick back-adhering portion, and a step is formed in the portion. Therefore, the formation of the end seal portion when obtaining the sealed tube container becomes unstable.

On the other hand, the present invention is particularly applicable to the case where a tubular molded body is molded by a laminated sheet using a resin having a high melting temperature and a low fluidity at the time of heat melting as a resin layer for heat sealing. Also, the back surface of the tube container body does not expose the end surface of the laminated sheet forming the tube container body to the inside of the tube container, and has excellent properties for quality retention of the filling material. A tube container body having the same is provided.

The present invention also provides a tube container body in which the back sticking portion has no step and the end seal portion for obtaining a sealed tube container is stably formed.

[0012]

According to a first aspect of the present invention, a laminated sheet having a front surface resin layer and a rear surface resin layer is formed so that the back surface resin layer of the laminated sheet becomes an inner peripheral surface layer. In the body of the tube container composed of a tubular molded body, the spine-attached portion of the tubular molded body is on the left side of the laminated sheet,
A tube container body having a butting portion in which the end surfaces of the right side portions are butted to each other, and a plastic sealing tape is attached to at least the inner peripheral surface side of the tubular molded body at the butting portion. Consists of parts.

According to a second aspect of the present invention, in the structure of the tube container body of the first aspect, the plastic container sealing tape and the back surface resin layer of the laminated sheet are formed of the same resin. Consists of.

According to a third aspect of the present invention, in the structure of the tube container body of the first aspect, the plastic sealing tape is a laminated resin tape, and the plastic molding tape has a tubular shape. The resin layer on the side in contact with the inner peripheral surface side of the body and the back surface resin layer of the laminated sheet are formed of a tube container body portion formed of the same resin.

In the tube container body of the present invention having the above-mentioned structure, the tube container body laminated sheet having a surface resin layer and a back resin layer is used, and the back resin layer in the tube container body laminated sheet is the inner circumference of the container. The tubular molded body is formed so as to be a surface layer, and the spine-attached portion of the cylindrical molded body is formed on the end surface of one side portion and the other side portion of the laminated sheet for a tube container body. It is formed of a butting portion with the end surface and a plastic sealing tape attached to at least the inner peripheral surface side of the tubular molded body at the butting portion.

The tube container body laminated sheet used for forming the tube container body may be the same as that used in the conventional tube container of this type, but it may be used as an inner peripheral surface layer of the tube container. A laminated sheet in which the back surface resin layer is formed of polyethylene, polypropylene, polyester such as polyethylene terephthalate, ethylene-vinyl alcohol, nitrile resin, or the like is preferable.

An example of such a laminated sheet will be described. From the front surface resin layer side to the back surface resin layer side, "nitrile resin layer /
A laminated sheet laminated in the order of "polyethylene terephthalate resin layer / polyethylene film layer / extruded resin layer of polyethylene / ethylene-methacrylic acid copolymer resin layer / aluminum foil / nitrile resin layer", or from the surface resin layer side as well. A laminated sheet or the like laminated on the back resin layer side in the order of "nitrile resin layer / polyethylene terephthalate resin layer / polyethylene terephthalate film layer having SiO _x vapor deposition layer / nitrile resin layer" contains, for example, a fragrance or the like. It is preferable because it has no permeability to the internal filler and has an excellent barrier property.

In the back sticking portion which is the sticking part of the tube container body, at least the plastic sealing tape stuck to the inner surface of the tube container body is made of a resin having a welding property. In the step of forming the part, the laminated sheet is brought into contact with a predetermined position when the end surface of the one side portion and the end surface of the other side portion are butted, and is affixed to at least the inner surface side of the tube container body portion at the butted portion,
Stacked.

In the tube container body of the present invention, a plastic sealing tape is attached to the inner surface of the container body at the abutting portion of the end surface of one side and the end surface of the other side of the laminated sheet. Although it is sufficient, if a plastic sealing tape is also attached to the outer surface of the body of the container, a good sealing property can be obtained by the back attaching portion.

The plastic sealing tape attached to the spine-attached portion may be a single-layer resin tape or a laminated resin tape.
At least the surface of the plastic sealing tape which is in contact with the backside resin layer of the laminated sheet forming the tube container body and the backside resin layer of the laminated sheet are formed of the same resin, Welding between the plastic sealing tape and the backside resin layer of the laminated sheet can be performed very well.

[0021]

EXAMPLES The specific constitution of the tube container of the present invention will be described below based on examples.

Example 1 In FIGS. 1 to 2, the tube container body is composed of a tubular molded body 2 made of a laminated sheet 8 for tube container body.

A cylindrical molded body 2 forming the body of the tube container.
Is a core layer 5 in which a biaxially stretched polyester film having a thickness of 12 μ and an aluminum foil having a thickness of 9 μ are laminated by a dry lamination method, and a biaxially stretched polyester film side of the core layer 5 is laminated by a dry lamination method. The surface resin layer 6 made of a nitrile resin [BAREX: registered trademark] having a thickness of 30 μ and the nitrile resin having a thickness of 50 μ laminated on the aluminum foil side of the core layer 5 by a dry lamination method [BAREX : Registered trademark] Laminated sheet 8 with backside resin layer 7 made of film
Thus, the spine-attached portion indicated by reference numeral 3 is formed into a tubular shape.

The backing portion 3 of the tubular molded body 2 has a butt portion A in which the end surface of the one side portion 9 and the end surface of the other side portion 10 of the laminated sheet 8 are butted, and the tubular shape at the butt portion A. It is formed of a plastic sealing tape 4 attached to the inner peripheral surface side of the molded body 2.

The sticking of the plastic sealing tape 4 is carried out by applying the end face of the side portion 9 of the laminated sheet 8 to the side portion 1 of the other side.
Prior to the formation of the abutting portion in which the end surface of 0 is abutted, the inner surface side of the tube container body corresponding to the abutting portion in which the end surface of the 1 side portion 9 and the end surface of the other side portion 10 are abutted to each other. , A seal tape 4 made of nitrile resin [Barex: registered trademark] having a thickness of 50 μm and a width of 8 mm is inserted, and then the back adhesive layer 3 is heated to be welded to the back surface resin layer 7 of the laminated sheet 8. Done by.

The tubular molded body 2 which is the tube container body of the example product obtained as described above is mounted on the mandrel-shaped mold in the mold for injection molding, and then the neck and neck of the narrow neck is attached. Part 11
And a frustoconical shoulder 1 continuous with the lower end of the mouth / neck 11
The tube container head 13 formed of an integral molded body with 2 was molded by injection molding of a nitrile resin [Barex: registered trademark] and, at the same time, joined to the upper end portion of the cylindrical molded body 2.

Then, the mouth / neck portion 11 is sealed with a sealing material,
Further, 100 g of shoe ink was filled from the lower end of the tubular molded body 2, and then the lower end of the tubular molded body 2 was welded to form the sealing portion 14, whereby the tube container 1 was obtained.

Example 2 In [FIG. 2] and [FIG. 3], the tube container body is
Cylindrical molded body 2 by laminated sheet 18 for tube container body
Consists of.

A cylindrical molded body 2 forming the body of the tube container.
Is a core layer 15 made of an ethylene-vinyl alcohol film having a thickness of 15 μ, and a surface resin layer 16 made of a polyethylene film having a thickness of 150 μ laminated on one surface of the core layer 15 by a dry lamination method. Core layer 1
A backing portion indicated by reference numeral 3 is formed into a tubular shape by a laminated sheet 18 with a backside resin layer 17 made of a polyethylene film having a thickness of 150 μ which is laminated on the other surface of No. 5 by a dry laminating method.

The spine sticking portion 3 of the tubular molded body 2 has a butting portion B where the end surface of the one side portion 19 and the other side portion 20 of the laminated sheet 18 are butted, and the tubular portion at the butting portion B. It is formed of a plastic sealing tape 24 attached to the inner peripheral surface side of the molded body 2.

Incidentally, the plastic sealing tape 24
Before the formation of the abutting portion where the end surface of the one side portion 19 and the end surface of the other side portion 20 of the laminated sheet 18 are butted, the end surface of the one side portion 19 and the other side portion 20 are attached. The seal tape 24 made of polyethylene resin having a thickness of 50 μ and a width of 6 mm is inserted at a position on the inner surface side of the tube container body corresponding to the abutting part where the end face of the aforesaid is abutted, and then the above-mentioned back attaching part 3 is formed. The heating is performed by welding to the back surface resin layer 17 of the laminated sheet 18.

The tubular molded body 2 which is the body of the tube container of the example product obtained as described above is mounted on a mandrel-shaped mold in a mold for injection molding, and then the neck and neck of a narrow neck is attached. Part 11
And a frustoconical shoulder 1 continuous with the lower end of the mouth / neck 11
At the same time as molding the tube container head 13 made of an integrally molded body with 2 by injection molding of polyethylene resin,
It was joined to the upper end of the cylindrical molded body 2.

Then, the mouth / neck portion 11 is sealed with a sealing material,
Furthermore, after filling 100 g of cosmetic cream from the lower end of the tubular molded body 2, the lower end of the tubular molded body 2 is welded to form the sealing portion 14, whereby the tube container 1 is formed. Obtained.

Example 3 By replacing the portion of the nitrile resin used in the tube container 1 of Example 1 with a polyethylene terephthalate resin, a tube container as another example product was obtained.

Example 4 By replacing the portion of the nitrile resin used in the tube container 1 of Example 1 with an ethylene-vinyl alcohol copolymer resin, a tube container as another example product was obtained. .

[0036]

The tube container body of the present invention is formed by laminating a laminated sheet having a front surface resin layer and a back surface resin layer so that the back surface resin layer of the lamination sheet becomes an inner peripheral surface layer. A tubular molded body, the spine sticking portion of the tubular molded body has at least a butted portion formed by butting the end surfaces of the left and right side portions of the laminated sheet together, and at least the tubular molded body at the butted portion. It is formed of a plastic sealing tape attached to the inner peripheral surface side.

Therefore, in the tube container body of the present invention, the end faces of the side edges of the laminated sheet forming the tube container body are not exposed in the tube container body.

Therefore, there is no direct contact between the laminated sheet forming the body of the tube container and the filler inside the tube container, and for example, metal foil or ethylene-vinyl is contained in the laminated sheet for the body of the tube container. Even when the alcohol copolymer resin layer and the like are included, these layers do not come into contact with the inner filler in the tube container, and have an excellent effect on the quality retention characteristics of the inner filler. ， The effect is played.

Particularly, a resin having a high melting temperature and a low fluidity at the time of heat melting, for example, a nitrile resin described in Japanese Patent Publication No. 57-60234 as a heat-sealing resin having an excellent gas barrier property. An extremely excellent effect can be obtained when obtaining a tubular molded body by a laminated sheet laminated as the back surface resin layer.

Further, in the tube container body of the present invention, the thickness of the back sticking portion of the container body does not become thick. Therefore, the end seal portion when obtaining the sealed tube container is stably formed.

[Brief description of drawings]

FIG. 1 is a model cross-sectional view for explaining an example of a back sticking portion of a tube container body of the present invention.

FIG. 2 is a perspective view illustrating the outline of a tube container.

FIG. 3 is a model cross-sectional view for explaining another example of the back sticking portion of the tube container body of the present invention.

FIG. 4 is a model cross-sectional view illustrating a state of a conventional spine-attached portion of a tube container body formed of a laminated sheet in which heat-sealing resin layers having good fluidity are laminated.

[Explanation of symbols]

1: Tube container 2: Tube container body made of tubular molded body 3: Back-attached part of tubular molded body 4: Plastic sealing tape 5: Middle of laminated sheet forming tubular molded body 2 Core layer 6: Surface resin layer in laminated sheet forming tubular molded body 7: Back surface resin layer in laminated sheet forming tubular molded body 8: Cylindrical molded body 2 formed Laminated sheet 9: One side of laminated sheet 8: Other side of laminated sheet 11: Neck neck 12: Shoulder 13: Tube container head A: One side of laminated sheet 8 9 and other side part 10 butting part

Claims (3)

[Claims] 1. A tube container body made of a cylindrical molded body formed by a laminated sheet having a front surface resin layer and a back surface resin layer so that the back surface resin layer of the laminated sheet becomes an inner peripheral surface layer. In the above, the back-adhered portion of the tubular molded body is abutted with the end surfaces of the left and right side portions of the laminated sheet, and is attached to at least the inner peripheral surface side of the tubular molded body at the butted portion. A tube container body, which is formed of a plastic sealing tape that is worn. 2. The tube container body according to claim 1, wherein the plastic sealing tape and the backside resin layer of the laminated sheet are formed of the same resin. 3. A plastic sealing tape comprising a laminated resin tape, and a resin layer on the side of the plastic sealing tape which is in contact with the inner peripheral surface side of the tubular molded body, and a laminated sheet. The tube container body according to claim 1, wherein the backside resin layer is formed of the same resin.