JP2013177153A - Laminated tube container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated tube container having transparency, excellent in gas barrier property, and having beautiful designability and decorativeness.SOLUTION: In a laminated tube container formed by providing a head part constituted of a shoulder part and a mouth part on one opening of a transparent cylindrical body part, the cylindrical body part is constituted of a laminate that an antistatic-treated front surface base material layer/an intermediate layer/a gas barrier layer/an inner face base material layer are sequentially laminated from the front surface side, and a printed pattern layer and a sensor sensitive printed layer are formed on a rear surface of the intermediate layer.

Description

  The present invention relates to a laminated tube container, and more particularly, to a laminated tube container having transparency, excellent cosmetics, gas barrier properties, and contents preservability.

  Conventionally, the tube container is used as a container for storing paste-like materials such as toothpaste, cosmetics, and food. Depending on the contents, gas barrier properties such as oxygen gas barrier properties and water vapor barrier properties are required for long-term storage. In order to satisfy these characteristics, a laminated material using an aluminum foil is generally used. However, there is a problem that an aluminum residue is generated during incineration after use. Further, depending on the contents, there is a problem that transparency is lacking and the contents cannot be visually recognized.

  Examples of the gas barrier material which has transparency and does not have a problem of residues at the time of incineration include polyvinylidene chloride resin and ethylene / vinyl alcohol copolymer resin. There are tube containers that are blow molded or extruded using these resins in combination with other resins. However, these are printed by silk screen, dry offset, etc. after forming the tube container in the molding process. Since the printed layer is formed on the surface of the container, there are problems such as wear resistance.

  Examples of transparent gas barrier materials that can be used in laminated tube containers include polyethylene terephthalate films deposited with inorganic oxides, ethylene / vinyl alcohol copolymer films, and the like.

  Conventionally, a laminate tube container is composed of a laminate in which a base material layer, a gas barrier layer, and a sealant layer are sequentially laminated. And the upper surface of the base material layer of the both ends of the laminated body and the inner surface of a sealant layer are piled up, and it heat-seals, and the cylindrical trunk | drum is formed.

  The surface base material layer and the inner surface base material layer constituting the cylindrical body are made of a film made of polyethylene resin. Usually, the printed pattern layer is formed on the surface of the surface base material layer by displaying necessary items such as a product name along with desired pattern printing.

  In this method, a laminate for forming a laminate tube container is prepared in advance, and then a printed pattern layer is formed on the surface of the surface base material layer. This is to improve production efficiency by handling small lots. As a printing method, silk screen, dry offset, ink jet or the like is used. However, this printing method has a limit in the cosmetics such as a pattern. In addition, when a printed pattern layer is formed on the surface of the surface base material layer, there are problems such as contamination due to dropping off of the printing layer due to wear, and contamination due to charging easily.

  Recently, with the spread of laminated tube containers, consumers have come to use many similar shaped tube containers in their daily lives. For this reason, there are demands for cosmetic and decorative properties of the laminated tube container, and for the dirt to be hardly attached.

  In order to solve these problems, it is a proposal to create a decorative film in advance and wind the film around a polyethylene tube (Patent Document 1).

This is an improvement in the cosmetic and decorative properties of the polyethylene tube, which is different from the gist of the present invention. is there.

  Therefore, there is a demand for a laminated tube container having transparency, excellent gas barrier properties, and cosmetics and decorative properties.

Japanese Patent Laid-Open No. 7-40515

  The present invention solves such problems, and an object of the present invention is to provide a laminated tube container having transparency, excellent gas barrier properties, and cosmetic and decorative properties.

  In order to solve the above problems, the inventors have conducted intensive studies and have completed the present invention.

The invention according to claim 1 of the present invention is a laminated tube container in which a head comprising a shoulder and a mouth is provided in one opening of a cylindrical body having transparency.
The cylindrical body portion is composed of a laminate in which a surface base material layer / intermediate layer / gas barrier layer / inner surface base material layer subjected to an antistatic treatment is laminated at least from the surface side,
The laminated tube container is characterized in that a printed pattern layer and a sensor sensing print layer are formed on the back surface of the intermediate layer.

  In the invention according to claim 2 of the present invention, the print layer for sensor sensing is formed in the shape of a white belt around the other opening of the cylindrical body, and the width of the belt is 2 mm or more. The laminate tube container according to claim 1.

  The invention according to claim 3 of the present invention is the laminate according to claim 1 or 2, wherein the gas barrier layer is a polyethylene terephthalate film or an ethylene / vinyl alcohol copolymer film on which an inorganic oxide is deposited. It is a tube container.

  The invention according to claim 4 of the present invention is the laminated tube container according to claim 3, wherein the inorganic oxide is silicon oxide, aluminum oxide, or a mixture thereof.

  The laminate tube container of the present invention has transparency and is provided with a cosmetic property, a decorative property, and a gas barrier property. By having an antistatic film layer on the surface base layer, dirt is less likely to adhere, and by forming a printed pattern layer and a sensor sensing print layer on the back side of the intermediate layer, it has excellent wear resistance. ing. The printing method is also capable of gravure printing, and a laminated tube container excellent in cosmetics can be produced.

According to claim 1 of the present invention, the cylindrical body portion is composed of a laminate in which at least the surface base material layer / intermediate layer / gas barrier layer / inner surface base material layer subjected to antistatic treatment are sequentially laminated. The surface of the surface base material layer is treated with an antistatic agent to make it difficult for dirt to adhere. Further, by providing a printed pattern layer and a sensor sensing print layer on the back surface of the intermediate layer, it has excellent wear resistance. In addition to silk screen printing and dry offset printing, gravure printing is possible, and a container with excellent cosmetic properties can be formed.

  According to claim 2 of the present invention, the sensor-sensing print layer is formed in a white belt around the other opening of the cylindrical body, and the width of the belt is 2 mm or more. The accuracy of sensing can be improved, and for example, the cylindrical body can be cut to an appropriate length, and the accuracy of the seal portion when filling the contents can be improved. When the strip width is less than 2 mm, the sensor sensing accuracy is lowered.

  According to claim 3 of the present invention, a tube container having transparency and gas barrier properties can be obtained by using a polyethylene terephthalate film or an ethylene / vinyl alcohol copolymer film on which an inorganic oxide is deposited.

  According to claim 4 of the present invention, when the inorganic oxide is silicon oxide, aluminum oxide, or a mixture thereof, transparency and stable gas barrier properties can be obtained.

It is explanatory drawing which shows an example of the laminated tube container of this invention. It is sectional drawing which shows an example of the laminated body of this invention. It is sectional drawing which shows an example of the laminated body of this invention. It is explanatory drawing which shows an example of the laminated tube container of this invention. It is explanatory drawing which shows an example of the laminated tube container of this invention.

  Below, the form for implementing this invention is demonstrated concretely.

  FIG. 1 is an explanatory view showing an example of a laminated tube container of the present invention. It is explanatory drawing which shows an example of the assembly of the laminate tube container of this invention. The laminated tube container 60 includes a cylindrical body portion 21, a head portion 22 including a shoulder portion 23 and a mouth portion 24 that are injection-molded or compression-molded, a sealing material 25 that thermally bonds the mouth portion 24, and a cap 26. Is formed. The shoulder portion 23 is inserted into one opening of the cylindrical body portion 21 and integrated by heat bonding. Thereafter, the sealing material 25 is thermally bonded to the mouth portion 24, and then the cap 26 is screwed to the mouth portion 24. The other opening of the cylindrical body part into which the cap 26 is screwed is an opening for filling the contents.

  FIG. 2 is a cross-sectional view showing an example of the laminate of the present invention. It is sectional drawing of XX 'of FIG. A surface base material layer A, an intermediate layer B, a gas barrier layer C, and an inner surface base material layer D are formed in this order from the surface side. The surface base layer A is composed of a low-density polyethylene resin layer 1, an adhesive layer 2, and a low-density polyethylene resin layer 3 that have been subjected to antistatic treatment. The adhesive layer 2 is an extruded low density polyethylene resin layer for bonding the antistatic treated low density polyethylene resin layer 1 and the low density polyethylene resin layer 3 together.

  Next, the intermediate layer B is made of a polyethylene terephthalate film 4. The low density polyethylene resin layer 3 and the adhesive layer 2 are bonded together. The adhesive layer 2 is an extruded low density polyethylene resin layer as described above. A printed pattern layer 5 is formed on the surface of the intermediate layer opposite to the adhesive layer 2.

  The gas barrier layer C is made of a polyethylene terephthalate film 8 on which an inorganic oxide is deposited.

The inorganic oxide deposition surface of the film 8 and the printed pattern layer 5 surface of the intermediate layer are laminated via an adhesive 7.

  The inner surface base layer D is composed of a linear low density polyethylene resin layer 9.

  An inorganic oxide-deposited polyethylene terephthalate film 8 surface and the linear low-density polyethylene resin layer 9 are laminated with an adhesive 7 interposed therebetween.

  Although not shown in the figure, the cylindrical body is formed by superposing and heating and pressing the surface base material layer and the inner surface base material layer at both end portions of the laminated body. Then, it cuts and forms in the length of a desired cylindrical trunk | drum.

  FIG. 3 is a cross-sectional view showing an example of the laminate of the present invention. It is sectional drawing of YY 'of FIG. The cross section of the other opening part of a cylindrical trunk | drum is shown. The sensor sensing print layer 6 is provided in the opening of the cylindrical body. By providing the sensor-sensing printing layer 6 on the back surface of the polyethylene terephthalate film 8 on which the inorganic oxide is deposited, the printing body 6 can be cut off to an appropriate length without dropping off due to wear. Also, after filling the contents, the opening can be sealed and sealed at an appropriate site. The printed layer 6 makes the sensor easy to detect.

  FIG. 4 is an explanatory view showing an example of the laminated tube container of the present invention. In the laminated tube container 60 of the present invention, the shoulder portion 23 of the head portion 22 is inserted into one opening portion of the cylindrical body portion 21 and thermally bonded. A cap 25 is screwed into the mouth of the head. A sensor sensing print layer 6 is formed around the other opening of the cylindrical body.

  FIG. 5 is an explanatory view showing an example of the laminated tube container of the present invention. It is explanatory drawing which shows an example of the product state of the laminate tube container 60 of this invention. A packaged product comprising a laminated tube container 60 in which an appropriate amount of contents are filled from the other opening of the cylindrical body, the ends of the openings are thermally bonded, and the contents are sealed is shown.

  The embodiment of the present invention will be described in more detail.

  The surface substrate layer is a heat-sealable thermoplastic resin, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene- Vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, ethylene Alternatively, an acid-modified polyolefin resin obtained by modifying a polyolefin resin such as polypropylene with acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, or other unsaturated carboxylic acid can be used. A low density polyethylene resin is preferred from the viewpoint of productivity, processability, and price.

  In order to form a low-density polyethylene resin layer, film formation is possible using a molding method such as a T-die extrusion method or an inflation method.

  Moreover, it is preferable that the formed film is subjected to antistatic treatment. By performing the antistatic treatment, it is possible to make it difficult for dust and dirt to adhere to the surface of the cylindrical body. In order to perform the antistatic treatment, there are a method of mixing an antistatic agent in the film and a method of applying it to the surface of the film. Either method is possible.

The thickness of the surface base material layer is preferably in the range of 140 to 170 μm. Moreover, in the case of a film subjected to antistatic treatment, it is possible to reduce the thickness of the film. For example, it is possible to use a range of 30 to 50 μm and to adjust by laminating with an untreated low density polyethylene film. Is possible.

  For the intermediate layer, polyesters such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate, polyolefins such as polyethylene and polypropylene, polyamides such as nylon-6 and nylon-66, polycarbonate, polyacrylonitrile, polyimide, polyvinylidene chloride, polyvinyl alcohol Films of ethylene / vinyl alcohol copolymer, polyether sulfone, polymethyl methacrylate, and the like can be used. Among these, a polyethylene terephthalate film or a polyamide film is particularly preferable. The thickness of the film is preferably in the range of 10 to 12 μm.

  A printed pattern layer and a sensor sensing print layer are formed on one side (back side) of the intermediate layer film. The printing layer can be formed by a known method such as gravure printing, offset printing, flexographic printing, letterpress printing, and ink jet printing. In particular, gravure printing is preferable from the viewpoint of continuous processability and pattern reproducibility. Moreover, in order to improve the adhesiveness of a printing layer, the adhesiveness can be improved by performing, for example, a corona treatment on the surface of the film. The printed pattern layer is formed, for example, by displaying necessary items such as a product name together with desired pattern printing. The sensor-sensing print layer may be, for example, a square shape or other shapes, but a belt-like print layer is particularly preferable. The color of the print layer may be any color that can be easily detected by various sensors such as a color layer and a color difference. White is particularly preferable.

  As the gas barrier layer, a polyethylene terephthalate film on which an inorganic oxide is deposited can be used. Examples of inorganic oxides include oxides such as silicon oxide, aluminum oxide, titanium oxide, zirconium oxide, and tin oxide, or oxides composed of a composite thereof. Among these, aluminum oxide, silicon oxide, magnesium oxide alone, or a composite thereof is preferable. The thickness of the inorganic oxide is generally preferably in the range of 5 to 300 nm. The value is appropriately selected.

  As the film of the gas barrier layer, a stretched film having transparency is preferable. Examples thereof include polyester films such as polyethylene terephthalate and polyethylene naphthalate, polyolefin films such as polyethylene and polypropylene, polystyrene films, polyamide films, polyvinyl chloride films, polycarbonate, polyacrylonitrile, polyimide, and the like. Of these, a stretched polyethylene terephthalate film or a stretched polyamide film is preferred. The thickness of the film is preferably in the range of 10 to 12 μm.

  An ethylene / vinyl alcohol copolymer film (hereinafter referred to as an EVOH film) can also be used for the gas barrier layer. It can be used in place of a film deposited with an inorganic oxide. The EVOH film is a copolymer of ethylene and vinyl alcohol and is known. The copolymerization ratio is preferably a high molar ratio vinyl alcohol. The ratio is preferably 20 to 50 mol% for ethylene and 80 to 50 mol% for vinyl alcohol. The thickness of the EVOH resin layer is preferably in the range of 7 to 20 μm, and particularly preferably in the range of 8 to 12 μm.

The inner surface base layer is a thermoplastic resin that can be thermally bonded to the surface base layer, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer. , Ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene An acid-modified polyolefin resin obtained by modifying a polyolefin resin such as a polymer, ethylene or polypropylene with acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, or other unsaturated carboxylic acid can be used. Of these, linear low-density polyethylene resin is preferred from the standpoint of flavor retention, productivity, processability, and price.

  In order to form a linear low density polyethylene resin layer, it is possible to form a film using a molding method such as a T-die extrusion method or an inflation method. The thickness of the film formed is preferably in the range of 100 to 200 μm, and more preferably in the range of 110 to 130 μm.

  A low density polyethylene resin can be used as the adhesive layer for bonding the upper base material layer and the intermediate layer. The resin can be extruded by a T-die extruder and bonded by sand poly processing. In this case, it is preferable to apply an anchor agent to the intermediate layer and perform sand poly processing because the adhesive force is improved.

The intermediate layer and the gas barrier layer can be bonded by a dry laminating method through an adhesive. Adhesive strength can be increased by using a dry laminating method. As the adhesive to be used, a two-component curing type polyurethane, polyester, polyether, or the like can be used. The adhesive can be applied by a known method such as gravure roll coating, reverse roll coating, or kiss coating. Moreover, as an application quantity of an adhesive agent, the range of 0.5-10 g / m < ² > (dry) is preferable.

Further, the gas barrier layer and the inner surface base material layer can be bonded by a dry laminating method through an adhesive. Adhesive strength can be increased by using a dry laminating method. As the adhesive to be used, a two-component curing type polyurethane, polyester, polyether, or the like can be used. The adhesive can be applied by a known method such as gravure roll coating, reverse roll coating, or kiss coating. Moreover, as an application quantity of an adhesive agent, the range of 0.5-10 g / m < ² > (dry) is preferable.

  Since the printed pattern layer is formed on the back surface of the intermediate layer, it does not fall off due to wear. Further, there is no decrease in adhesion due to bleeding of the antistatic agent. The same applies to the sensor sensing print layer. This is because even if the antistatic agent bleeds, it is barriered by the polyethylene terephthalate film. As the ink used for the printing pattern layer and the sensor sensing printing layer, for example, a gravure printing ink having adhesion to a commonly used polyethylene terephthalate film can be used.

  The laminate tube container of the present invention has transparency and gas barrier properties. While making use of transparency, it is possible to devise various effects such as cosmetic effects by gravure printing and decorative effects, for example, combined effect of pattern and emboss, combined effect of metallic feeling by pattern and transfer foil, and combined with cosmetic properties. Can be improved.

  Also, since the sensor sensing printed layer does not fall off due to wear, the sensor sensing accuracy can be maintained even in the laminated tube container forming line and the content filling line.

The antistatic layer formed on the surface of the surface base material layer is formed by mixing or applying a chemical substance having a surface active action such as a surfactant onto the film. For example, the types of surfactants (classification as hydrophilic groups) include anionic surfactants such as carboxylates and sulfonates, cationic surfactants such as primary amine salts and secondary amine salts, and amino acids. Types of amphoteric surfactants, non-ionic surfactants such as polyethylene glycol type and polyhydric alcohol type.

  Specific examples of the present invention will be described below.

  As a surface base material layer, an antistatic low-density polyethylene film 40 μm and a low-density polyethylene film 80 μm were extruded by low-density polyethylene resin, sand-poli processed, and bonded together. The extruded low density polyethylene film had a thickness of 30 μm.

  Next, as an intermediate layer, a printed pattern layer and a sensor sensing print layer were formed on one side of a polyethylene terephthalate film 12 μm by gravure printing. The printed layer was formed in a white belt shape with a width of 4 mm. In addition, the cutting site | part which forms a cylindrical trunk | drum was cut | disconnected from the middle of 4 mm.

  Next, the low-density polyethylene film surface of the surface base material layer and the non-printing surface of the polyethylene terephthalate film were bonded together by extruding a low-density polyethylene resin and sand-polishing. The extruded low density polyethylene film had a thickness of 30 μm. At the time of bonding, an anchor agent was applied to the bonding surface of the polyethylene terephthalate film.

  Next, a film in which aluminum oxide was deposited on one surface of a polyethylene terephthalate film 12 μm was prepared as a gas barrier layer. The deposition thickness of aluminum oxide was 80 nm.

  Next, the printing surface of the polyethylene terephthalate film of the intermediate layer and the aluminum oxide vapor deposition surface of the gas barrier layer were bonded together by dry lamination using a urethane two-component reaction type adhesive.

  Next, the chain low density polyethylene film 120 μm of the inner surface base material layer and the polyethylene terephthalate film surface of the gas barrier layer were dry-laminated and bonded together using a urethane two-component reaction type adhesive.

  Thus, the laminated body for forming a cylindrical trunk | drum was created.

  Next, the surface base material layer and the inner surface base material layer at both ends of the laminated body were superposed and heated to form a cylindrical body so that the surface base material layer was on the upper side. Subsequently, it cut | disconnected according to the white printing layer for sensor detection, and formed the cylindrical trunk | drum. The shoulder portion of the head that was previously injection-molded was inserted into one opening of the cylindrical body, and was integrated by heat bonding. Thereafter, a sealing material was thermally bonded to the mouth, and the cap was screwed into the mouth.

  Next, the content as a facial cleanser was filled from the other opening of the cylindrical body, and the opening was sealed to produce a laminated tube container in which the content was sealed.

  Below, the specific comparative example of this invention is demonstrated.

<Comparative Example 1>
A laminated tube container was prepared in the same manner as in Example 1 except that a printed pattern layer and a sensor-sensing white print layer were provided on the surface of the low-density polyethylene film subjected to antistatic treatment.

<Evaluation method>
A wear test was performed from the upper side of the cylindrical body of the laminated tube container of Example 1 and Comparative Example 1.
The abrasion test was conducted using a Gakushin abrasion tester using a cotton cloth with a load of 200 g.

<Evaluation results>
In Comparative Example 1, the printed layer fell off after 40 times and contaminated the cotton fabric. In Example 1, there was no problem even when the printing layer was removed 100 times. In addition, when the sensor sensing effect of the white print layer for sensor sensing was examined, the sensor sensing effect of the comparative example 1 that was worn 40 times varied. In Example 1, there was no problem.

  The laminate tube container of the present invention has transparency, and has a cosmetic property, a decorative property, a gas barrier property, a fragrance retaining property, a sealing property, and the like. In particular, the tube container is less likely to get dirt and has a cosmetic effect by gravure printing. In particular, it can be used for cosmetics, face wash, food, toothpaste and the like.

A Surface base material layer B Intermediate layer C Gas barrier layer D Inner surface base material layer 1 Low-density polyethylene resin layer 2 subjected to antistatic treatment 2 Adhesive layer (low-density polyethylene resin layer)
3 Low density polyethylene resin layer 4 Polyethylene terephthalate film 5 Print pattern layer 6 Sensor sensing print layer 7 Adhesive 8 Inorganic oxide vapor-deposited polyethylene terephthalate film 9 Linear low density polyethylene resin layer 21 Cylindrical trunk 22 Head 23 Shoulder Portion 24 Portion 25 Sealing material 26 Cap 50 Laminate 60 Laminated tube container

Claims (4)

In a laminated tube container in which a head composed of a shoulder and a mouth is provided in one opening of a cylindrical body having transparency,
The cylindrical body portion is composed of a laminate in which a surface base material layer / intermediate layer / gas barrier layer / inner surface base material layer subjected to an antistatic treatment is laminated at least from the surface side,
A laminated tube container, wherein a printed picture layer and a sensor sensing printing layer are formed on the back surface of the intermediate layer.   2. The laminated tube according to claim 1, wherein the sensor sensing print layer is formed in a white belt around the other opening of the cylindrical body, and the width of the belt is 2 mm or more. container.   The laminated tube container according to claim 1 or 2, wherein the gas barrier layer is a polyethylene terephthalate film or an ethylene / vinyl alcohol copolymer film on which an inorganic oxide is deposited.   The laminated tube container according to claim 3, wherein the inorganic oxide is silicon oxide, aluminum oxide, or a mixture thereof.