JP3015297U - Container with barrier - Google Patents

Abstract

(57) [Summary] [Objective] To provide a container with a barrier which can easily and inexpensively improve the gas barrier property and the light shielding property and, at the same time, can be easily printed. [Structure] A preformed sheet formed by forming a vapor deposition layer of aluminum on a base material formed by mixing a synthetic resin and an inorganic filler into a sheet, and in-molding the surface of the container for injection molding. Is characterized by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a container with a barrier, and particularly to a container suitable for foods, medicines, and cosmetics.

[0002]

[Prior art]

 Generally, it is known that synthetic resin containers have air permeability, water vapor permeability, and translucency, although they are small. Such characteristics are not a serious problem for foods that are consumed in a very short period of time, but they cause quality deterioration for contents that require a certain degree of storability. Quality deterioration is manifested, for example, by alteration of additives, loss of water, or oxidation.

Therefore, in order to improve such a gas barrier property and a light shielding property, some kind of coating may be applied to the container surface. However, coating the surface of the finished container is expensive, and direct aluminum coating, which greatly improves gas barrier properties and translucency, requires a large amount of equipment.

[0004]

[Problems to be solved by the device]

 For this reason, it has been difficult to manufacture a synthetic resin container having gas barrier properties and light-shielding properties almost completely, and it is particularly difficult to manufacture an inexpensive product that can be used as a general simple food container. was. Even if the surface of the finished container is coated, it is difficult to print on the surface of the container. Therefore, it is necessary to attach another label to complete the product as a product.

The present invention has been made in view of the above matters, and can easily and inexpensively improve the gas barrier property and the light shielding property without requiring special equipment, and at the same time, the printing becomes easy. A technical problem is to provide a container with such a barrier.

[0006]

[Means for Solving the Problems]

 The present invention has the following configuration in order to solve the above technical problems. That is, a preformed sheet 3 formed by mixing a synthetic resin and an inorganic filler and biaxially stretching to form a sheet-shaped base material 1 on which an aluminum vapor deposition layer 2 is formed is injection-molded in a container 4 The surface was in-molded.

In the in-mold molding, the preliminary molding sheet 3 is inserted into a mold in advance, and when the synthetic resin is pressure-fed from the runner, it sticks to the inner surface of the mold. When the base material 1 and the container 4 are resins compatible with each other, for example, polypropylene resin and polystyrene resin, the two adhere to each other during molding without any special adhesion means, and have good moldability and disposal.

If the adhesive layer 5 is formed on the surface of the base material 1 on which aluminum is not vapor deposited, the container 4 will be in close contact with any synthetic resin. In this case, the preformed sheet 3 may be adhered to either the front surface or the back surface of the container 4. When the preformed sheet 3 is adhered to the inner surface of the container 4, the outer surface can be the same as a normal resin container. Further, the preformed sheet 3 can be adhered to and covered with the upper surface, the side surface, and the bottom surface, but a lid for covering it is usually attached to the upper surface after filling the contents.

Although the present invention comprises the above essential components, the present invention can be realized even if the following configurations are added. That is, a color coat is applied on the aluminum vapor-deposited layer 2 so as to differentiate the appearance. Furthermore, it can be printed on the aluminum vapor deposition layer 2 or on the color coat.

As the contents to be stored in the container 4, for example, yogurt, jelly, fresh confectionery, cosmetics, or chemicals that need to be particularly suppressed from deterioration are suitable.

[0011]

[Action]

 The preformed sheet 3 can be easily mass-produced in advance, the characteristics of the aluminum vapor deposition layer 2 and the base material 1 are integrated, and they have a synergistically high gas barrier property and light shielding property.

Then, the preformed sheet 3 is inserted into a mold and in-molded on the surface of the container. In this way, the container is completed with the preformed sheet 3 attached.

Further, since large-scale processing such as vapor deposition of aluminum is not required at the stage of molding the container, it can be mass-produced by general molding equipment. In particular, it has excellent UV protection. When the synthetic resin of the base material 1 and the container 4 is, for example, polypropylene resin, the materials are the same, and therefore the base material 1 and the container 4 are adhered to each other without providing a special bonding means.

Further, since the preformed sheet 3 has a sheet shape, desired printing can be performed in advance. Further, it has high workability and can be cut into an arbitrary shape.

[0015]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. In this example, as the base material 1, a waterproof and high-strength and chemical-resistant paper-like body (trade name: YUPO) formed by mixing a polypropylene resin and an inorganic filler into a sheet was used. .

Subsequently, the aluminum vapor deposition layer 2 is formed on the surface of the base material 1. The deposition is performed by placing the substrate 1 in an aluminum gas atmosphere by an ion plating method or the like. Here, the thickness of the vapor-deposited aluminum layer is preferably about 50 angstroms to 90 angstroms. If necessary, a color coat 6 can be applied on the aluminum vapor deposition layer 2. Further, a top coat (not shown) made of synthetic resin can be applied on the color coat 6. The top coat is generally for preventing the color coat 6 from being oxidized and maintaining a beautiful luster.

The top coat may be directly formed on the aluminum vapor deposition layer 2. In this case, there is an effect of preventing the aluminum vapor deposition layer 2 from being oxidized. The preformed sheet 3 configured as described above is wound in a roll shape so as to be easily used.

Subsequently, the preformed sheet 3 is cut into a predetermined shape and attached to the surface of the container 4. Explaining this step, the preformed sheet 3 is cut according to the container 4 to be formed and inserted into the molds 7 and 8 prepared in advance (see FIG. 3). Here, the preforming sheet 3 is preferably placed on the inner surface of the outer die 8.

In this state, the polypropylene resin for the container is pressure-fed from the runner 9 formed in the mold 8. Then, the polypropylene resin is filled while pressing the preformed sheet 3 against the inner surface of the outer die 8. Therefore, the preformed sheet 3 is completely integrated with the container 4 by in-mold molding.

As described above, when the container 4 is made of polypropylene resin, they are brought into close contact with each other without providing a special bonding means, but when the container 4 is made of another material (for example, PET), the preformed sheet is used. It is necessary to form the adhesive layer 5 on the 3 side. As the adhesive layer 5, ethylene vinyl acetate (EVA) or acrylic adhesive is suitable.

Then, the completed container 4 is filled with the contents 11 such as yogurt, and finally the lid is covered with the laminating sheet 12 to complete the product. If printing 10 is performed on the preformed sheet 3 in advance, the printing of the product can be completed at the stage of in-mold molding.

Although the preliminary sheet 3 is adhered only to the side surface of the container 4 in this embodiment, it may include the bottom surface. As described above, the preformed sheet 3 can be easily mass-produced in advance, the properties of the aluminum vapor deposition layer 2 and the base material 1 are integrated, and the preformed sheet 3 has a high gas barrier property and a light shielding property. Then, by integrating this preformed sheet 3 with the container 4, a container having the above-mentioned various properties is obtained. In particular, the container 4 significantly suppresses deterioration of the additive contained in the content 11. That is, the permeation of nitrogen, CO ₂ , and oxygen is suppressed, and the evaporation of water is suppressed, so that the deterioration is suppressed.

[0023]

[Effect of device]

 As described above, according to the present invention, a pre-molded sheet having high gas barrier property and light shielding property, which is mass-produced in advance, is configured to be in-mold molded on the outer surface of the container. A container having a high gas barrier property and a light shielding property can be easily and inexpensively obtained without the need. Moreover, since the preformed sheet is a sheet, it can be printed extremely easily.

In addition, when the container is molded from polypropylene, there is an advantage that the preformed sheet does not need an adhesive layer.

[Brief description of drawings]

FIG. 1 is a sectional view of a completed container showing an embodiment of the present invention.

FIG. 2 is a sectional view of a preformed sheet showing an embodiment of the present invention.

FIG. 3 is a sectional view of a manufacturing process showing an embodiment of the present invention.

FIG. 4 is a sectional view of a preformed sheet according to another embodiment of the present invention.

[Explanation of symbols]

 1 ... Base material, 2 ... Aluminum vapor deposition layer, 3 ... Preformed sheet, 4 ... Container, 5 ... Adhesive layer

Claims (3)

[Scope of utility model registration request] 1. A preformed sheet formed by mixing a synthetic resin and an inorganic filler and biaxially stretching to form a sheet and forming an aluminum vapor deposition layer on a container surface for injection molding. A container with a barrier characterized by being formed by in-mold molding. 2. The container with a barrier according to claim 1, wherein the synthetic resin and the container are polypropylene resin or polystyrene resin. 3. A synthetic resin and an inorganic filler are mixed to form a sheet, and an aluminum vapor deposition layer is formed on one surface of the base material, and an adhesive layer is formed on the other surface of the base material. A container with a barrier, which is formed by in-molding a preformed sheet formed on the surface of an injection-molded container.