JP7022368B2 - Packaging material for tube containers and tube containers - Google Patents

Description

The present invention relates to a packaging material for a tube container and a tube container, and more particularly to a packaging material for a tube container and a tube container capable of easily forming a matte appearance.

Conventionally, as a tube container, a tube container having a first sealant layer sequentially laminated from an outer surface to an inner surface, a base material layer, a gas barrier layer, and a second sealant layer is known. Further, a mat forming layer having a mat-like appearance is formed on the first sealant layer located on the outer surface.

Such a mat-forming layer is formed, for example, by pressing a chill roll having an uneven shape on the surface against the first sealant layer. Alternatively, it is formed by applying a matte varnish on the first sealant layer.

However, when the mat forming layer is produced by pressing the chill roll, the surface of the chill roll may be clogged due to long-term use, and the mat forming surface may not be formed accurately.

Alternatively, when the matte varnish is applied to the first sealant layer to produce a matt forming layer, it may be difficult for the matte varnish to peel off from the first sealant layer and express a delicate pattern with the matte varnish.

Japanese Unexamined Patent Publication No. 2005-178851

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a packaging material for a tube container and a tube container which are formed without using a chill roll and have a matte appearance which is hard to be easily peeled off. ..

The present invention comprises a mat-forming layer, a first sealant layer, a base material layer, and a second sealant layer, which are laminated and arranged in order from the outer surface to the inner surface in a packaging material for a tube container. Is a packaging material for tube containers, which comprises a blend layer of polyethylene and polypropylene provided on the outer surface.

The present invention is a packaging material for a tube container in which the weight ratio of the polyethylene layer in the blend layer is larger than that of the polypropylene layer.

The present invention is a packaging material for a tube container, wherein the mat forming layer further includes a polyethylene layer and a polypropylene layer.

The present invention is a packaging material for a tube container in which the base material layer is printed.

The present invention is a packaging material for a tube container further provided with a gas barrier layer.

The present invention comprises a mat-forming layer, a first sealant layer, a base material layer, and a second sealant layer, which are laminated and arranged in order from the outer surface to the inner surface in a tube container, and the mat-forming layer is on the outer surface. It is a tube container made of a packaging material for a tube container, which comprises a provided blend layer of polyethylene and polypropylene.

The present invention is a tube container in which the weight ratio of the polyethylene layer in the blend layer is larger than that of the polypropylene layer.

The present invention is a tube container in which the mat forming layer further includes a polyethylene layer and a polypropylene layer.

The present invention is a tube container in which the base material layer is printed.

The present invention is a tube container further provided with a gas barrier layer.

As described above, according to the present invention, it is possible to obtain a packaging material for a tube container and a tube container which are formed without using a chill roll which is easily clogged and have an appearance which is hard to be easily peeled off.

FIG. 1A is a side sectional view showing a laminated body of packaging materials for tube containers. FIG. 1B is a side sectional view showing a mat forming layer. FIG. 2 is a diagram showing a manufacturing method of a tube container. FIG. 3 is a diagram showing a manufacturing method of a tube container. FIG. 4 is a side sectional view showing a packaged product 20A including a tube container.

<Embodiment of the present invention>
The packaging material for a tube container and the tube container according to the present invention will be described in more detail below with reference to drawings and the like.

First, the tube container 20 produced by using the tube container packaging material 10 according to the present invention will be described with reference to FIGS. 2 to 4.

The tube container 20 includes a tubular body portion 21 including a packaging material 10 for a tube container, and a shoulder portion 13 and a mouth portion 14 manufactured by providing a resin to the tubular body portion 21 by compression molding. .. Further, the cap 16 is attached to the mouth portion 14 of the tube container 20.

The tube container 20 having such a structure is obtained through the following manufacturing process. First, as shown in FIG. 2, the tube container packaging material 10 according to the present invention is used, and both ends 11 and 11'of the tube container packaging material 10 are overlapped with each other to form an outer surface and an inner surface of the polymerized portion. The tubular body portion 21 is manufactured by heat-sealing to form the heat-sealed portion 12. Next, as shown in FIG. 3, the above-mentioned tubular body portion 21 is mounted in a mold, and the shoulder is placed in one opening 21A of the tubular body portion 21 by, for example, a normal method such as a compression molding method. The portion 13 and the mouth portion 14 are formed. In this way, the tube container 20 is manufactured. Then, the cap 16 is attached to the mouth portion 14 of the tube container 20.

Next, for example, toothpaste and other contents 17 are filled in an appropriate amount from the other opening 21B of the tubular body portion B of the tube container 20. After that, the other opening 21B is welded to form the bottom seal portion 18, and a packaged product 20A including the tube container 20 filled and packaged with the content 17 is obtained.

Next, the packaging material 10 for a tube container for producing the tube container 20 will be described. As shown in FIGS. 1A and 1B, the tube container packaging material 10 comprises a mat forming layer 1, a first sealant layer 2, a base material layer 3, and a printing ink 3a arranged in order from the outer surface to the inner surface. It includes a laminate having a printed substrate layer 3A, a gas barrier layer 4, and a second sealant layer 5.

Further, the mat forming layer 1 and the first sealant layer 2 are bonded by a dry laminate (DL), and the first sealant layer 2 and the printing substrate layer 3A are bonded by an extrusion laminate (EC), and the printing substrate layer 3A is bonded. And the gas barrier layer 4 are joined by a dry laminate (DL), and the gas barrier layer 4 and the second sealant layer 5 are also joined by a dry laminate (DL).

Of these, the mat-forming layer 1 has a mat-like appearance toward the outer surface, and is a blend layer 1a of polyethylene (PE) and polypropylene (PP) laminated in order from the outer surface, and a polyethylene (PE) layer 1b. , Polypropylene (PP) layer 1c and the like.

The ratio of the thickness of the blend layer 1a, the PE layer 1b and the PP layer 1c is about 10% for the blend layer, 70 to 80% for the PE layer, and about 10% for the PP layer.

Further, the weight ratio of PE in the blend layer 1a is larger than the weight ratio of PP.

As described above, in the blend layer 1a, the weight ratio of PE is larger than the weight ratio of PP, so that the PP molecules are dispersed and exist in the PE molecules having a large weight ratio. Therefore, the PP particles are dispersed in the PE base base material, and the matte appearance of the blend layer can be exhibited to the outside.

Since the mat forming layer 1 of the tube container packaging material 10 has such a structure and has a blend layer 1a that exhibits a mat-like appearance to the outside, light is applied to the tube container packaging material 10 from the blend layer 1a side. When irradiated, the haze value is 99.0% to 99.5%. The haze value was measured by the following method using a haze measuring instrument HM-150 of Murakami Color Technology Laboratory Co., Ltd. That is, the ratio of the diffused transmitted light to the total transmitted light when the film was irradiated with visible light was measured by vertically irradiating the mat forming layer 1 on the outermost surface of the laminate with light. It is expressed as haze = scattered light / total light transmitted light × 100 (%).

As described above, since the packaging material 10 for the tube container has a high reflectance, it is possible to present an appropriate mat-like appearance to the outside.

The mat forming layer 1 of the tube container packaging material 10 may have at least a blend layer 1a, and may not necessarily have the PE layer 1b and the PP layer 1c.

Further, the blend layer 1a is a layer bonded to the second sealant layer 5 as described above, and also has a sealant property.

Next, the material of each part constituting the packaging material 10 for a tube container will be described.

The first sealant layer 2 and the second sealant layer 5 are made of polyethylene (PE). Specifically, the first sealant layer 2 and the second sealant layer 5 may be made from the following materials.

The first sealant layer 2 and the second sealant layer 5 may be any as long as they can be melted by heat and fused to each other, for example, low density polyethylene (LDPE), medium density polyethylene (MDPE), and high density polyethylene (HDPE). ), Linear (linear) low density polyethylene (LLDPE), polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid Polyolephine-based resins such as copolymers, ethylene-propylene copolymers, methylpentene polymers, polyethylene or polypropylene are used as unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, and others. A resin made of one or more of the acid-modified polyolephine-based resin, polyvinylacetate-based resin, polyester-based resin, polystyrene-based resin, and other resins modified in the above can be used.

Further, the printing base material layer 3A has a base material layer 3, and a polyethylene terephthalate (PET) layer can be used as the base material layer 3, and printing is performed under the PET layer 3 to print under the PET layer 3. Ink 3a can be provided.

Further, as the gas barrier layer 4, a metal foil or a base film having a vapor-deposited film deposited on the base film can be used.

Specifically, examples of the base film include aluminum foil as the metal foil used as the gas barrier layer. Polyethylene resin, polypropylene resin, cyclic polyolefin resin, fluororesin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile ru-butadiene-styrene copolymer (ABS resin), polyvinyl chloride Resins, fluororesins, poly (meth) acrylic resins, polycarbonate resins, polyethylene terephthalates, polyester resins such as polyethylene naphthalate, polyamide resins such as various nylons, polyimide resins, polyamideimide resins, polyaryls Various resin films or sheets such as phthalate resin, silicone resin, polysulfone resin, polyphenylene sulfide resin, polyether sulfone resin, polyurethane resin, acetal resin, cellulose resin, etc. can be used. can.

In the present invention, it is particularly preferable to use polyethylene terephthalate (PET) as the base film.

Further, as the thin-film vapor-deposited film deposited on the base film, an aluminum-deposited film can be used, and as the gas barrier layer, VM-PET containing the base film and the aluminum-deposited film can be used.

Next, a method for manufacturing a packaging material for a tube container will be described.

First, printing is applied to the base material layer 3, and the printing ink 3a is provided under the base material layer in this way, and a printing base material layer 3A having the base material layer 3 and the printing ink 3a is obtained.

Next, the gas barrier layer 4 is bonded to the inner surface side of the printing substrate layer 3A by dry laminating, and the second sealant layer 5 is bonded to the inner surface side of the gas barrier layer 4 by dry laminating.

Next, the first sealant layer 2 is bonded to the outer surface side of the printed substrate layer 3A by extrusion laminating (EC) using polyethylene, and the mat forming layer 1 containing the blend layer 1a is further bonded to the outer surface side of the first sealant layer 2. Be joined. In this way, the packaging material 10 for a tube container is obtained.

The tube container packaging material 10 thus obtained is formed into a cylindrical shape, and both end portions 11 and 11'are overlapped as described above, and the tube container packaging material 10 is formed at both end portions 11 and 11'. The outer surface and the inner surface are heat-sealed to produce a tubular body portion 21.

In this case, the mat forming layer 1 and the first sealant layer 2 provided on the outer surface side of the tube container packaging material 10 and the second heat seal layer 5 provided on the inner surface side are melted and joined to form a cylinder. A torso 21 is obtained.

Next, the tubular body portion 21 is inserted into the mold, and the shoulder portion 13 and the mouth portion 14 are formed on the tubular body portion 21 by a compression molding method to obtain a tube container 20 (FIG. 2). And see Figure 3).

As described above, according to the present embodiment, the tube container packaging material 10 has a mat forming layer 1 located on the outer surface side, and the mat forming layer 1 is further provided at least on the outer surface side as a blend layer 1a. including. Therefore, the blend layer 1a can give a matte appearance to the outside. Further, in order to produce a packaging material for a tube container having a matte appearance, it is not necessary to use a chill roll having an uneven shape on the surface, and further, it is not necessary to apply a matte varnish that easily peels off to the surface of the packaging material for a tube container, which is easy and easy. It is possible to easily produce a packaging material for a tube container having a matte appearance that is difficult to peel off.

1 Matte forming layer 1a Blend layer 1b Polyethylene layer 1c Polypropylene layer 2 First sealant layer 3 Base material layer 3a Printing ink 3A Printing base material layer 4 Gas barrier layer 5 Second sealant layer 10 Tube container packaging material 20 Tube container

Claims (8)

In packaging materials for tube containers
A mat forming layer, a first sealant layer, a base material layer, and a second sealant layer, which are laminated and arranged in order from the outer surface to the inner surface, are provided.
The mat forming layer includes a polyethylene and polypropylene blend layer provided on the outer surface, and includes a blend layer.
The weight ratio of the polyethylene in the blend layer is larger than that of the polypropylene.
In the blend layer, polypropylene molecules are dispersed in the polyethylene molecules, and polypropylene particles are dispersed in the polyethylene-based base material of the blend layer to give a matte appearance to the outside.
Packaging material for tube containers. The packaging material for a tube container according to claim 1 , wherein the mat forming layer further includes a polyethylene layer and a polypropylene layer , which are sequentially laminated toward the inner surface of the blend layer . The packaging material for a tube container according to claim 1 or 2 , wherein the base material layer is printed. The packaging material for a tube container according to any one of claims 1 to 3 , further comprising a gas barrier layer. In a tube container
A mat forming layer, a first sealant layer, a base material layer, and a second sealant layer, which are laminated and arranged in order from the outer surface to the inner surface, are provided.
The mat forming layer includes a polyethylene and polypropylene blend layer provided on the outer surface, and includes a blend layer.
The weight ratio of the polyethylene in the blend layer is larger than that of the polypropylene.
In the blend layer, polypropylene molecules are dispersed in the polyethylene molecules, and polypropylene particles are dispersed in the polyethylene-based base material of the blend layer to give a matte appearance to the outside.
A tube container made of packaging material for tube containers. The tube container according to claim 5 , wherein the mat-forming layer further includes a polyethylene layer and a polypropylene layer , which are sequentially laminated toward the inner surface of the blend layer . The tube container according to claim 5 or 6 , wherein the base material layer is printed. The tube container according to any one of claims 5 to 7 , further comprising a gas barrier layer.

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