JPH0563833U - Pouch film for inclusion - Google Patents

Abstract

(57) [Abstract] [Purpose] The end surface of the oxygen-absorbing film is wrapped by an oxygen-absorbing material, which is placed in a packaging bag or a packaging container to prevent oxidation of the packaged object, by a thermal lamination method. Can be sealed, the appearance is improved, and a thin film is used. [Composition] A composite (B + A or B + A + B) in which an absorbent paper B such as paper is laminated on one or both sides of a film of an oxygen-absorbing sheet A prepared by blending iron powder and an electrolyte with a thermoplastic resin.
An oxygen-absorbing encapsulating pouch film, which is obtained by thermally laminating (pouching) both sides or one side of the above as a breathable film so as to be wrapped with a sealing film.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a laminated oxygen-absorbing film which is enclosed in a packaging bag and a container together with an object to be packaged for the purpose of improving the storability of contents in packaging of foods, pharmaceuticals, precision machine parts, electronic parts, etc. It is a thing.

[0002]

[Prior Art]

 It is important to remove oxygen from the packaging bag or container in order to improve the shelf life of foods, pharmaceuticals, precision machine parts, electronic parts, etc. and the shelf life.

Currently, oxygen scavengers are used to remove the above-mentioned oxygen, but since most of these oxygen scavengers are powdery or granular, they can be used as they are or in the form of tablets in a small bag. It is packed in small packages and loaded into packaging bags or containers. However, in these conventional products, a product having a shape different from that of a product having a certain size is packaged together with the product to be packaged, which impairs the aesthetics of a packaging bag or container and reduces the compactness of the packaging. In addition to making the packaging process complicated at times, it may be misidentified as a part of the packaged food or medicine, which may cause consumers to accidentally eat or swallow it.

For the purpose of preventing the appearance of the above-mentioned packaging bag and container, compactness of packaging, and the risk of accidental ingestion and accidental ingestion, a sheet of oxygen scavenger and a thick plate-like oxygen laminated with a plastic film or the like on the surface Absorbent sheets have been proposed, but since they have a certain thickness, the oxygen absorbing film inside can be easily seen from the edge surface of the sheet, and the iron powder, which is an oxygen absorbing material, undergoes an oxidation reaction to turn brown. When doing so, it may impair the aesthetics of the packaging bag or container and may cause anxiety to consumers, and also has the problem that the compactness of the packaging cannot be sufficiently improved due to its thick thickness. Moreover, the complexity of packaging and the risk of accidental ingestion and accidental ingestion have not been completely prevented.

[0005]

[Problems to be solved by the device]

 The present invention has been made to solve the above-mentioned drawbacks, has an aesthetic appearance of a packaging bag or a packaging container, and has a compact packaging, does not complicate the packaging work, and has a risk of accidental ingestion and ingestion. It is to provide a completely new thin-walled oxygen-absorbing encapsulating pouch film.

[0006]

[Means for Solving the Problems]

 The oxygen-absorbing encapsulating pouch film of the present invention is a composite body in which absorbent paper B is laminated or superposed on one side or both sides of oxygen-absorbing film A prepared by blending a thermoplastic resin with an oxygen-absorbing substance. It is characterized in that at least one surface of this composite is used as a breathable film and is pouched so as to be wrapped with a sealing film.

As the thermoplastic resin used in the present invention, those generally known as thermoplastic resins such as polyethylene, polypropylene, and ethylene vinyl acetate copolymer are used. Preferably, an electrolyte such as iron powder and salt is used. It is preferable that a film-like material having appropriate flexibility can be molded by extrusion molding or the like containing the oxygen absorbing substance.

As the oxygen-absorbing substance, those used in this kind of field can be used, and it is composed of iron powder, a substance which produces water or ions necessary for oxidizing iron powder, and usually an electrolyte. Salt is usually used as the electrolyte, but the electrolyte is not limited thereto. In the production of the oxygen-absorbing film, an extender pigment such as calcium carbonate or a coloring pigment such as iron oxide may be optionally mixed in addition to the oxygen-absorbing substance. The thickness of the oxygen-absorbing film is not particularly limited, but is usually 0.5 mm or less, preferably about 0.02 to 0.07 mm. The oxygen-absorbing film may be perforated in order to improve the air permeability and increase the surface area to increase the oxygen absorption efficiency.

In the present invention, as the absorbent paper B, ordinary kraft paper, Japanese paper, etc. can be used, and these are selected according to the purpose. The absorbent paper B may be laminated on one side with polyethylene if necessary. When the absorbent paper B is laminated or laminated on one surface or both surfaces of the oxygen absorbent film A to form a composite, if the oxygen absorbent film A is made slightly smaller than the absorbent paper B, the end surface of the oxygen absorbent film A is completely outside. It is more advantageous because it becomes invisible. When forming the composite, the absorbent papers are usually simply laminated, but they may be laminated using an adhesive, and the oxygen-absorbing film A and the absorbent paper B may be laminated so as not to shift during pouching. It may be spot-bonded.

The breathable film is a film having oxygen permeability and moisture permeability so that an oxygen absorbing substance can act, and it can be used if it is a film used as upper and lower films for a pouch. Specific examples of the sealing film for pouching include paper and laminated products thereof in addition to the above-mentioned breathable film. When the material to be laminated is a non-breathable aluminum foil or plastic film, it can be used as a porous film after perforating. The sealing film is preferably one that can be easily heat-sealed on all four sides without affecting the oxygen-absorbing film, since the film is pouched by the heat lamination method. When using paper as the sealing film, either one should be a heat-adhesive film or synthetic paper or plastic laminated paper. Examples of non-breathable films that do not require breathability include laminated films such as polypropylene film, polyester film / polyethylene film, aluminum foil / polyethylene film.

The composite (B + A + B or A + B) is usually formed simply by superposing the absorbent paper B on both sides or one side of the oxygen-absorbing film A, and the absorbent paper B absorbs heat generated when the oxygen-absorbing film A is pouched. It plays a role in blocking the influence and adsorbing water after the pouch to improve the performance of the oxygen absorption film. Water is applied to the absorbent paper B by keeping the pouch film for encapsulation in an oxygen-free wet chamber according to a conventional method. To place the breathable film on both sides or one side of the composite and perform pouching, a heat laminating method for pouches or the like is performed. The method of thermal lamination is that at least one surface side of the composite prepared in advance is used as a breathable film, and the composite is placed between the sealing films, and the composite is passed through a heat roll / holding roll and fused by heat and pressure. It is a method of manufacturing one pouch film in which these are integrated. In some cases, the plastic film as the sealable film may be directly laminated with a fusion polypropylene film or the like on the composite.

The present invention has a basic structure in which absorbent paper is laminated on both sides of an oxygen-absorbing film and both sides are pouched with a sealing film, but a packaging bag or a packaging bag for packaging oily foods or the like as contents is provided. When the pouch film of the present invention is used in the container, the surface of the sealing film may be covered with a film having high oxygen permeability, oil resistance and chemical resistance. If necessary, the surface of the sealing film such as the breathable film may be printed or colored, and a protective coating may be provided on these surfaces. The encapsulating pouch film of the present invention is not particularly limited, but the total thickness is 1 mm or less, preferably 0.5 mm or less.

Since the encapsulating pouch film of the present invention improves the aesthetics of the end surface of the film and is thin and flexible, it is printed or the like on the surface at the time of use to label or display the contents. It can also be used as an instruction manual. When the packaging form is a bag, it can be loaded into the bag at the same time as it is made by hanging it on a bag-making machine.

[0014]

[Action]

 The present invention cuts out a composite body in which absorbent paper is laminated on both sides of an oxygen-absorbing film, which is slightly smaller than the target size, into a suitable size, plies it with a sealing film on both sides of the composite film. , Pouch film for inclusion. The encapsulating pouch film is used by inserting it together with the packaged item into a packaging bag or container with a high oxygen barrier property. Since the encapsulating pouch film of the present invention seals the sealing film together at the position of the composite film sandwiching the oxygen-absorbing film, the pouch film itself does not need to be seen directly. Since the thin pouch film has a thin surface and a large surface area, the oxygen in the packaging bag or container is efficiently absorbed by the encapsulating pouch film, and it is possible to prevent the oxidization of the package and the deterioration caused by the presence of oxygen. ..

[0015]

【Example】

 Hereinafter, the present invention will be described with reference to examples. In the following examples, parts are parts by weight.

1, 2 and 3 are schematic cross-sectional views showing the constitution of each embodiment of the encapsulating film of the present invention. It should be noted that FIGS. 1 to 3 are illustrated with a space provided between each component to show the structure of the present invention, but the actual pouch film is a single film in which all the components are in close contact. Has become. The same applies to FIG. 10 described later. As the oxygen-absorbing film 1, 150 parts of commercially available reduced iron powder of 150 mesh and 2 parts of salt were mixed with 100 parts of low-density polyethylene, and uniformly dispersed and molded by an inflation method to a thickness of 0.4 mm. A film was used. Kraft paper having a basis weight of 230 g / m ² was used as the absorbing paper.

As the air-permeable film among the sealing films, a laminated sheet of porous plastic film, the synthetic paper and perforated polyester film / perforated polyethylene film / paper / perforated polyethylene film was used. The laminated sheet used was the same synthetic paper as described above, and the perforated polyester film and porous polyethylene used had a thickness of 80 μm. As the porous plastic film, a film having a thickness of 0.06 mm, which was obtained by filling calcium carbonate based on high-density polyethylene and stretching it, was used. As the non-breathable film, a laminated polypropylene film / polyethylene film laminate (thickness: 50μ), a polyester film / polyethylene film laminate (60μ), and an aluminum foil / polyethylene film laminate were used.

As a pouching method, the layers were laminated using a thermal laminating device which is usually used. An outline of an example of the thermal laminator is shown in FIG. As shown in the figure, the breathable film 3 and the non-breathable film 4 are overlapped with the guide rolls 18 on both sides of the laminated composite 15 of the oxygen-absorbing film 1 and the absorbing paper 2, and the pressure-bonding roll 19 is used for pressure bonding. Then, the film 3'on the periphery of the composite is adhered and pouched by a method in which the film is held by the pinch roll 20 and then wound up. Cut the pouches into individual pouches, or cut into individual pouches when they are supplied as rolled products and filled into packaging bags.

FIG. 1 shows that the breathable film 3 is laminated on both sides of the composite (B + A) in which the absorbent paper 2 is laminated on the upper surface of the oxygen absorbent film 1, or the breathable film 3 is arranged on one side of the composite (B + A). The pouch film for encapsulation in which the non-breathable film 4 is pouched on the surface of is shown. FIG. 2 shows an encapsulating pouch film obtained by pouching a composite (B + A + B) in which the absorbent paper 2 is superposed on both sides of the oxygen-absorbing film 1. FIG. 3 shows an example of a composite in which the absorbent paper 2 laminated on both sides is made larger than the oxygen absorbing film 1. By doing so, the oxygen-absorbing film 1 can be made completely invisible from the outside.

4, 5, and 6 are schematic cross-sectional views showing examples of the sealing film. FIG. 4 shows a laminated product in which the perforated polyester film 5 / perforated polyethylene film 6 / paper 7 / perforated polyethylene film 8 are laminated in this order from the top and used as a breathable film. FIG. 5 shows an example of a laminated product of a stretched polypropylene film 9 / polyethylene film 6, and FIG. 6 shows an example of a laminated product of polyester film 10 / polyethylene film 6, which are used as non-breathable films. For these sealing films, the laminated material at the bottom of the figure is used so as to be the inside of the pouch.

FIG. 7 shows an example in which a protective coating layer 11 is provided on the upper surface of a laminated product in which, for example, a perforated polyethylene film 8 / paper 7 / perforated polyethylene film 8 are laminated in this order. The protective coating layer 11 is oxygen permeable and has oil resistance and chemical resistance.

FIG. 8 is a cross-sectional view showing an example of using the encapsulating pouch film of the present invention. For example, an oxygen impermeable bag 13 made of a material obtained by laminating polyethylene on a high barrier polyester film together with the contents 14 is provided. 1 shows a state in which the encapsulating pouch film 12 is packaged.

Each of the encapsulating pouch films in each of the above examples is finished to a thickness of about 0.5 to 0.7 mm, the oxygen absorbing film is not visible on the end faces of the film, and the appearance is improved. It can be used as a film, and when loaded in a packaging bag or container, it improves the aesthetics of the packaged product and makes the package more compact. Not only did it pose no danger of drinking, but it also had good oxygen absorption. Further, in the case of packaging precision machine parts and electronic parts, as shown in FIG. 9, it is possible to cover the surfaces of these parts as the contents 14 like the conventional rustproof paper.

FIG. 10 is an enlarged cross-sectional view showing another embodiment of the present invention, which is an example in which an adhesive 16 is applied to the back surface of the encapsulating pouch film and the upper surface thereof is covered with a release paper 17. In use, the release paper 17 can be removed and used by adhering it to the back surface of the lid of the packaging container, etc. By using in this way, misuse can be completely prevented. The adhesive may be applied to the entire one surface of the encapsulating pouch film and covered with a release paper. Since the label can be replaced by printing on the surface of the encapsulating pouch film or the absorbent paper in the pouch, the appearance on the packaging is not spoiled.

FIG. 11 is a perspective view showing an example of the encapsulating pouch film of the present invention. For example, when arranging a breathable film on both sides for pouching, it is possible to heat and seal only the four sides of the breathable film, so that the letters, patterns, etc. printed on the surface of the absorbent paper 2 inside or on the breathable film. Can be sealed without blurring. Since the encapsulating pouch film of the present invention can be made more flexible by simply stacking the oxygen-absorbing film and the absorbent paper, the encapsulating pouch film itself is used as a material for forming one surface of the packaging bag. It can also be used. In this case, the pouch film on the outer side of the packaging bag is, of course, a non-breathable film. When used in this way, the encapsulating pouch film is a part of the packaging bag, so the problems of aesthetics of the package and compactness of the package, as well as problems of accidental ingestion and swallowing, are completely solved. It

[0026]

[Effect of the device]

 The encapsulating pouch film of the present invention is different from the conventional film type in that the two upper and lower sealing films are heat-bonded at the position of the end face around the oxygen absorbing film, so that the end face of the oxygen absorbing film is Is not visible, the appearance of the end surface of the film is improved, the thickness is thin, and the laminated material provides sufficient flexibility, so it is easy to load in a packaging bag or container. Therefore, it can be expected to improve the aesthetics of packaging bags and containers and to make the packaging compact, and since it has a sufficient surface area, it has good oxygen absorption.

Since the encapsulating pouch film of the present invention can be formed into a tape-shaped product having a suitable width in which a large number of pouches are connected by making the upper and lower sealing films continuous films, In addition to being easy to store, the packaging method is also easy, such as separating the pouches into individual pouches while rewinding them with a packaging machine, and filling them in packaging containers and bags together with the items to be packaged. Furthermore, since it is in the form of a film, it is possible to obtain a design effect by printing on the surface. In addition, it is possible to use the pouch film of the present invention by applying an adhesive to one surface of the pouch film and sticking it to the back surface of the lid of the packaging container as in the case of conventional labels. It is a thing.

[Brief description of drawings]

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

FIG. 2 is a schematic cross-sectional view showing another embodiment of the present invention.

FIG. 3 is a schematic sectional view showing still another embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view showing an example of a breathable film.

FIG. 5 is an enlarged cross-sectional view showing an example of a non-breathable film.

FIG. 6 is an enlarged cross-sectional view showing another example of a non-breathable film.

FIG. 7 is an enlarged cross-sectional view showing still another example of a non-breathable film.

FIG. 8 is a sectional view showing an example of a usage state of the encapsulating pouch film of the present invention.

FIG. 9 is a cross-sectional view showing another example of the use state of the encapsulating pouch film of the present invention.

FIG. 10 is a cross-sectional view showing an example of an encapsulating pouch film of the present invention coated with an adhesive on one surface.

FIG. 11 is a partially cutaway side view showing an example of the encapsulating pouch film of the present invention.

FIG. 12 is a schematic view showing an example of a thermal laminating method.

[Explanation of symbols]

 1 Oxygen Absorbing Film 2 Absorbing Paper 3 Breathable Film 4 Non-Breathable Film 12 Pouch Film for Encapsulation 13 Oxygen-Impermeable Bag 14 Contents 15 Complex 16 Adhesive 17 Release Paper

Claims (3)

[Scope of utility model registration request] 1. A composite in which an absorbent paper such as paper is laminated or laminated on one or both sides of an oxygen-absorbing film prepared by blending an oxygen-absorbing substance with a thermoplastic resin, and at least one surface thereof is breathable. An oxygen-absorbing encapsulating pouch film, which is pouched so as to be wrapped with a sealing film as a film. 2. The pouch film according to claim 1, wherein the oxygen-absorbing substance is a mixture of iron powder and an electrolyte such as salt. 3. An oxygen-absorbing encapsulating pouch film obtained by adjusting the encapsulating pouch film obtained in claim 1 under high humidity for a certain period of time to give moisture to absorbent paper.