JP2782223B2 - Method for producing sealed container containing oxygen-absorbing bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention aims to prevent the oxidation of a filling material in a container, mainly a filling material mainly composed of foods, and removes the filling material into the container together with the filling material. The present invention relates to a method for manufacturing a sealed container containing an oxygen-containing bag.

"Prior art" In order to prevent deterioration of foods caused by oxidation and to prevent mold, etc., the foods are sealed in a container having an oxygen barrier property, and a deoxygenator sealing bag is also provided in the container. The system has come to be used frequently, for example, a packing system in which the filling material and the oxygen scavenger enclosing bag are mixed in the container,
A sealed container or the like using a lid in which a deoxygenation sealing bag is fixed in advance to the inner peripheral surface of the lid with a double-sided adhesive tape or a hot-melt type adhesive is used.

[Problem to be Solved by the Invention] By the way, the conventional packing method in which the filling material and the oxygen-absorbing agent-encapsulated bag are mixed in the container is based on the conventional method. And are mixed, so
For example, when the filling material is a granular material or a powdery material, the oxygen scavenging bag is buried in the filling material. For this reason, when using the filling, the oxygen-containing bag is separated from the filling,
There is annoyance that must be removed.

Also, in a sealed container using a lid pre-fixed with a double-sided adhesive tape or a hot-melt type adhesive on the inner surface of the lid, the oxygen-containing bag is sealed around the lid. Further steps and equipment for pre-adhering to the surface are required, which causes an increase in cost.

On the other hand, according to the method of the present invention, the heat bonding step between the container body and the lid when obtaining the sealed container having the filling therein is performed, and the inner peripheral surface of the container body or the lid is removed. The thermal bonding process between the oxygen-containing bag and the oxygen-containing bag is performed by a simultaneous process, and the packing material is mixed with the oxygen-sealing bag in the above-described container. Produces a sealed container easily and reliably without the problem of complicating the consumption process, without the need for the process and equipment for pre-adhering the oxygen-absorbing agent-encapsulated bag to the peripheral surface of the lid. It provides a way to:

"Means for Solving the Problems" The above-mentioned problems are solved by a method for producing a sealed container accommodating the oxygen-absorbing agent-enclosed bag of the present invention having the configuration described below.

That is, according to the present invention, after a deoxygenator enclosing bag and a predetermined filling material are placed in a container main body, a lid closing an opening in the container main body is brought into contact with the opening of the container main body. ,
When a hermetically sealed container is formed by thermally bonding the container body and the lid around the opening of the container body, a heat bonding step between the container body and the lid, Alternatively, a method of obtaining a hermetically sealed container accommodating the oxygen-absorbing agent-encapsulated bag by performing the heat bonding step with the inner peripheral surface of the lid in a simultaneous step.

The oxygen-absorbing agent-encapsulated bag used in the method for producing a sealed container containing the oxygen-absorbing agent-enclosed bag of the present invention having the above-described configuration is a bag in which an oxygen-absorbing agent having ordinary oxygen-absorbing performance is enclosed. For example, a package or the like in which an oxygen absorber such as an iron-based or ascorbic acid-based is wrapped in a breathable packaging material and the four peripheral edges thereof are heat-sealed, etc. The bag itself needs to have a thermal adhesive property between itself and the inner peripheral surface of the container body or the lid.

Therefore, the bag of the oxygen-absorbing agent-enclosed bag is the same as
A resin layer for thermal bonding formed on at least one portion of the both back surfaces by coating or the like, or provided with an extended portion with respect to a sealed portion of the oxygen scavenger, and A resin in which a resin layer for thermal bonding is formed on at least one of the front and rear surfaces by coating or the like is used.

Further, in the method for producing a sealed container of the present invention having the above configuration, in order to minimize the influence of oxygen gas on the contents in the container, the container body and the lid,
It is formed of a material having an oxygen gas barrier property. For the container body, for example, a molded product made of a laminated sheet having a gas barrier resin layer made of a saponified ethylene-vinyl acetate copolymer, polyvinylidene chloride, or the like, or an Al foil, or a molded product made of an acrylonitrile resin is used. And
The lid may be made of, for example, polyvinylidene chloride-coated nylon resin (film) sheet, polyvinylidene chloride-coated polypropylene resin (film) sheet, polyvinylidene chloride-coated polyester resin (film) sheet, polyvinylidene chloride-coated cellophane, ethylene-acetic acid. (Film) sheet made of saponified vinyl copolymer resin, polyvinylidene chloride resin (film) sheet, (film) sheet made of acrylonitrile resin, or a multilayer sheet containing the (film) sheet in a laminated structure Etc. are used.

The sealed container itself formed by the container body and the lid preferably has an oxygen permeability of 20 cc / m ² · atm · 24 hrs. Or less.

"Example" Hereinafter, a specific configuration of a method for manufacturing a sealed container containing the oxygen scavenger encapsulant of the present invention will be described with reference to the drawings.

Example 1 FIG. 1 shows an example of a sealed container in which a bag for enclosing an oxygen scavenger obtained by the method of the present invention is contained. Reference numeral 10 denotes a container body 1 made of a hot-pressed body using a laminated sheet [A] having the following laminated structure as a molding material, and a laminate sheet [A] obtained by punching and forming the same into a predetermined contour shape. And a cover 6 provided.

In the inside of the sealed container 10, a predetermined filling material and an oxygen-absorbing agent enclosing bag 20 as shown in FIG. 2 are enclosed. The oxygen scavenger enclosing bag 20 includes an oxygen scavenger enclosing portion 21 and an extending portion 22 extending from the enclosing portion 21, and the surface layer of the extending portion 22 is a resin 23 for seat heel, The resin layer for heat sealing 23 and the inner peripheral surface layer of the lid 6 are adhered to each other by a thermal bonding step at the same time as the thermal bonding step between the container body 1 and the lid 6. Things.

Laminated sheet [A] Polypropylene resin layer (thickness 30 μ) / ethylene-vinyl alcohol copolymer resin layer (thickness 40 μ) / polypropylene resin layer (thickness 30 μ) The container main body 1 has a bottom wall 2 , The surrounding wall 3,
And a flange portion 4 extending outward from an upper edge of the peripheral wall portion 3. The bottom wall portion 2 has a shallow bottom portion 5 protruding upward. It has become. Then, a polypropylene resin layer forming an inner peripheral surface layer of the lid body 6 at a position corresponding to the shallow bottom portion 5 and a heat seal forming a surface layer of the extending portion 22 in the oxygen absorbing agent enclosing bag 20. The thermal bonding step between the resin layer 23 for use and the thermal bonding step between the flange portion 4 and the lid 6 in the container body 1, that is, the sealing step for obtaining a sealed container is performed at the same time. .

In other words, in the sealed container 10 containing the oxygen-absorbing agent-encapsulated bag 20 having the above-described configuration, the concave portion of the container body 1 is filled with a predetermined filling material, and the oxygen-absorbing agent-enclosing is filled on the shallow bottom portion 5. After placing the bag 20 such that the extending portion 22 of the oxygen-absorbing agent-enclosed bag 20 is on the container peripheral wall 3 side, as shown in FIG. 3, a seal head S having a protruding portion D, By using the retainer R having the concave portion H, the thermal bonding portion between the flange portion 4 of the container body 1 and the lid 6, the back surface (inner peripheral surface) of the lid 6, and the oxygen-absorbing agent enclosing bag The heat bonding portion between the extension portion 22 and the heat sealing resin layer 23 forming the surface layer of the extension portion 20 is formed and formed by heat bonding in a simultaneous step.

As the resin layer for heat sealing in the oxygen scavenger enclosing bag 20, it is preferable to use a resin layer made of, for example, polyethylene or polypropylene and having a thickness of about 10 to 60 μm.

[Operation and Effect of the Invention] In the method for producing a sealed container accommodating the oxygen-absorbing agent-encapsulated bag according to the present invention, the oxygen-absorbing agent-encapsulated bag is placed in a container body with a predetermined filling material. A lid for closing the opening in the container body is brought into contact with the opening of the container body, and thereafter, the sealed container is formed by thermally bonding the container body and the lid around the opening. Moreover, the thermal bonding between the oxygen absorbing bag and the inner peripheral surface of the container body or the lid body is performed by the thermal bonding at the same time as the thermal bonding step when the container body and the lid body are thermally bonded. Then, it is fixed.

Therefore, according to the method of the present invention, when the filling material in the container is used, even if the filling material is, for example, a granular material or a powdery material, the oxygen-containing bag is separated from the filling material. , Without performing an extra step of pre-adhering the sealed oxygen-containing bag to the peripheral surface of the lid inside the sealed container containing the oxygen-containing bag, which has an excellent action in handling without the need for removal. It can be manufactured easily and reliably.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an essential part of an example of a sealed container accommodating a bag containing an oxygen scavenger obtained by the method of the present invention, and FIG. 2 is a sealed container shown in FIG. FIG. 3 is a model sectional view showing a main part when the sealed container shown in FIG. 1 is manufactured according to the method of the present invention. DESCRIPTION OF SYMBOLS 1 ... Container main body 4 ... Flange part in container main body 1 6 ... Lid 10 ... Sealed container containing oxygen-absorbing agent enclosing bag 20 ... Oxygen-absorbing agent enclosing bag

Claims (1)

(57) [Claims] After a deoxygenator enclosing bag and a predetermined filling material are placed in a container body, a lid for closing an opening in the container body is brought into contact with the opening of the container body. When a hermetically sealed container is formed by thermally bonding the container body and the lid around the opening edge of the container body, a heat bonding step between the container body and the lid, A method for producing a hermetically sealed container containing an oxygen-absorbing agent-encapsulated bag, wherein the step of heat bonding between the container body and the inner peripheral surface of the lid is performed simultaneously.