JPS6132751Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a food and beverage container, more specifically, a food and beverage container in which a plastic container is inserted into a paper container. The aroma of the filled food and drink will not dissipate, and depending on the type of food and drink to be filled, it can be filled at high temperatures, and the filled food and drink will have a long shelf life. To provide a food and drink container that can be filled with food and drink and sealed and can withstand long-term storage.

It is already known that a paper container, such as a paper cup, is filled with food or drink by inserting a plastic film or plastic molded product of the same shape and size, but these are mainly made of powder or granules. Containers for beverages such as alcoholic beverages, juices, coffee, etc. have received less attention.

For this reason, the inventor of the present invention aimed to obtain a food and beverage container that can be filled with not only powders, granules, solids, etc., but also beverages such as alcoholic beverages, juices, and coffee, and can withstand long-term storage. After careful consideration and repeated experiments, we have developed a paper container with plastic coating on both sides, the outer layer is a polypropylene resin layer, the middle layer is a copolymer layer of polyvinyl alcohol and ethylene, and the inner layer is a polyester resin layer. These objects were successfully achieved by creating a food and drink container in which a plastic container in which these components were integrated was inserted. An example of the implementation of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 is paper, both sides of which are coated with plastic 2 to form a paper container 3. 4 is a polypropylene resin layer, 5 is a layer of a copolymer of polyvinyl alcohol and ethylene (hereinafter simply referred to as EVAL), and 6 is a polyester resin layer, and these polypropylene resin layer 4, EVAL layer 5, and polyester resin layer 6 are are integrated into a plastic container 7, which is inserted into the paper container 3 described above.

The polypropylene resin layer 4 constituting the plastic container 7 is the outer layer, and the middle layer of the EVAL layer 5 is the inner layer. The side that comes into contact with the product is called the inner layer.

In the present invention, each resin layer constituting the plastic container 7 may be made of a film made of these resins, or may be formed by molding molten resin by various molding means. good.

In the present invention, the polyester resin constituting the inner layer is a linear polyethylene terephthalate homopolymer having repeating ethylene terephthalate units or butylene terephthalate units, or a linear polybutylene terephthalate homopolymer, or a small amount thereof. Preferably used are copolymers prepared by copolymerizing comonomers, mixtures of these homopolymers or copolymers, and mixtures of these homopolymers and copolymers. In addition, especially when the article to be filled is an alcoholic beverage such as Japanese sake, Western liquor, fruit wine, etc., the inner layer of polyester has an inherent viscosity (phenol/tetrachloroethane = 50/50 (weight ratio)) at 25°C in a solution.
The intrinsic viscosity (obtained from the solution viscosity measured at ) is 0.5
It is preferably within the range of 1.4 to 1.4, more preferably 0.6 to 1.2.

Any type of plastic may be used to coat both sides of the paper container used in the present invention. Furthermore, although this paper container has been described as having an integrated body and a bottom, the present invention is not limited to this, and the body and the bottom may be made separately and then integrated. .

In the present invention, the lid used for the food/beverage container is not particularly explained, but may be appropriately selected depending on the article to be filled.

Since the present invention is constructed as explained in detail above, it is possible to provide a variety of convenient food and drink containers. Of course, Tokoroten,
Containers suitable for accommodating foods that contain liquids such as bean beans, foods that are at high temperature when filled into containers such as various jams, and beverages such as various alcoholic beverages, juices, fruit juices, coffee, etc. It is.
For containing food in a dry state, the food is contained in direct contact with the inner layer of the inserted plastic container, which is made of a polyester resin layer; Since it does not have any foreign odor, no foreign odor will be transferred to the food, and therefore, it will not affect the taste or odor at all. Furthermore, since the polyester resin layer has an extremely low permeability to gases such as oxygen and carbon dioxide, it prevents these gases from permeating, thereby preventing oxidation, increasing shelf life, and preventing aroma from dissipating. In addition to this, the EVAL layer greatly prevents oxygen from permeating, so food oxidation is extremely prevented, which increases shelf life and enables long-term storage, and also prevents food aroma from escaping. Therefore, the aroma at the time of manufacture can be maintained for a long period of time.

In addition, food and various beverages that contain liquids are stored in plastic paper containers that have no joints at all, so liquids do not seep out and the contents do not come into direct contact with each other. Since the polyester resin layer itself has no off-odor, it has no effect on the retention or odor of the contents, and the polyester resin layer has an extremely low gas permeability. Because it has an Eval layer in contact with it, the permeability of various gases including oxygen through this Eval layer is extremely low. It can prevent the effects of gases such as oxidation of objects.
This allows long-term storage and prevents the aroma of the contents from escaping.The polyester resin layer is inert to the contents, and polyester has good mechanical properties and chemical resistance, especially alcohol resistance. Because it has excellent properties and has no effect on the human body due to plasticizers such as polyvinyl chloride or residual monomers, it can be used as containers for alcoholic beverages such as Japanese sake and various Western liquors, juice drinks, fruit juice drinks, coffee, etc. is suitable, and can withstand high temperatures of up to 130°C when filling the contents, and can withstand up to 70°C for foods and beverages that require high-temperature filling, such as sake.
Sake, various jams, and juices are heated to a maximum temperature of about 80℃ for jams and 95℃ for juices, and are filled into containers. Even when liquid at a high temperature is injected, the outer polypropylene resin layer has heat resistance, which prevents the polyester resin layer from becoming easily deformed due to the effects of high temperatures and prevents the plastic container as a whole from deforming. There is no such thing. The plastic container in which these contents are housed has an extremely thin structure and is therefore not self-supporting at all, but since this plastic container is inserted into a paper container that is coated with plastic on both sides, it is self-supporting as a whole. Not only does the three-dimensional shape make it a strong container, but since it is a paper container with plastic coating on both sides, there is no need to worry about deformation or damage even if water leaks during filling or other processes. If there is sake inside, there is no harm in warming it by directly pouring the container into hot water.

In addition, even if a container containing a beverage is placed in a refrigerator to cool and store, there will be no condensation on the surface of the container, and there will be no deformation due to moisture absorption, making it suitable as a container for various beverages. This is an excellent container for alcoholic beverages, beverages containing alcoholic beverages, food and beverages that contain liquids, and food and beverages that respect aroma.

[Brief explanation of the drawing]

The accompanying drawing is a longitudinal sectional side view showing an example of the implementation of the present invention. 1: paper, 2: plastic coat, 3: paper container, 4: polypropylene resin layer, 5: EVAL layer, 6: polyester resin layer, 7: plastic container.

Claims (1)

[Scope of utility model registration request] In a paper container with plastic coating on both sides,
The outer layer is a polypropylene resin layer, the middle layer is a copolymer layer of polyvinyl alcohol and ethylene, and the inner layer is a polyester resin layer, and a plastic container in which these are integrated is inserted. food and drink containers.