JPH07219430A - Label type oxygen scavenger - Google Patents

Abstract

PURPOSE:To provide a stuck/fixed label type oxygen scavenger having no anxiety about the pollution by the oxygen scavenger, capable of being easily and surely stuck and fixed for use, suitable for commercial production, suitable for the automatic packing work of oxygen scavenger packages as commodities, and capable of being utilized in a wide area. CONSTITUTION:This label type oxygen scavenger 1 is laminated with a separator layer 40, a base layer 30 having an adhesive layer, an oxygen scavenger layer 20, and an air-permeable layer 10 in sequence, the air-permeable layer 10 is directly stuck to the base layer 30 at the peripheral section, and the label type oxygen scavenger 1 can be easily stuck for use when the separator layer 40 is peeled off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label type oxygen scavenger comprising a laminate of sheet oxygen scavengers. The label-type oxygen scavenger of the present invention can be attached to a packaging container such as a packaging bag for storing foods, cases, etc., which does not give a feeling of strangeness to the attached one, and is not accidentally eaten, and The internal oxygen scavenger component does not exude and does not stain the object to be preserved, it is safe even in the microwave oven, has excellent safety and hygiene, and is a label type debonder for sticking and fixing that can be widely used in a wide range of fields. It is an oxygen agent.

[0002]

2. Description of the Related Art In order to prevent deterioration due to oxygen and spoilage due to the growth of microorganisms and to maintain quality, so-called oxygen absorber packaging, in which oxygen absorbers are used for the preservation of products such as foods and pharmaceuticals, has become widespread. Nowadays, many kinds of packaged products in the hands of general consumers are enclosed with oxygen scavengers. Oxygen scavenger packaging (an oxygen scavenger in a small bag) in which a granular or powdery oxygen scavenger is packaged in a breathable packaging material is generally useful for oxygen scavenging, and the oxygen scavenger package is a gas barrier together with the stored items. -Packed in a sex container.

An oxygen scavenger in a small bag (hereinafter also referred to as a small bag)
If not fixed, there is a risk that it may be mixed with the product and give a sense of discomfort, or may be accidentally eaten or cooked. Also, if the pouch is damaged, the contents may leak and there is a risk of contamination. For this reason, when the oxygen absorber is required to be packed in the oxygen absorber packaging, it is fixed in the packaging container. Various methods for fixing the pouch have been proposed, and usually, the pouch and the inner wall surface of a container such as a bag or a case are bonded via an adhesive, a hot-melt agent, a double-sided tape, or the like. However, the surface of the pouch is not smooth, and the adhesive surface of the pouch does not always adhere due to "bulging" during manufacturing, and moreover, the entire surface of one side of the pouch is not adhered but partially adhered. There are many things. For this reason, the object to be preserved is caught in the gap or is caught, so that even if the pouch is not peeled off, the object to be preserved can be smoothly taken in and out of the container. Further, contamination of the surface of the pouch due to scattered dust when the powder is filled in the pouch is also a troublesome problem. Furthermore, the conventional oxygen scavenger in a pouch has a problem that, when microwave-irradiated by a microwave oven or the like, the bag is broken by sparks, heat, etc., and the contents of the oxygen absorber pouch are scattered to contaminate the product. there were. The pouch-shaped oxygen scavenger, which is useful in this way, still has many drawbacks to be improved.

As a form of oxygen absorber packaging, it has been proposed that the container itself should have oxygen absorbing performance.
For example, a method for making an outer bag with a laminated resin film containing an oxygen scavenger as disclosed in JP-B-62-1824, or an oxygen absorber layer as disclosed in JP-B-4-60826. There is a method of molding a container with a resin laminate including. However, these are not suitable for products that use low-priced general-purpose packaging containers and packaging bags because they require special containers to be manufactured by a special method. Limited to

Further, many proposals have been made to make the oxygen scavenger into a sheet form, including JP-A-2-72851. Although these sheet-shaped oxygen scavengers are not in the form of particles or powder and there is no concern that the contents will spill out, the surface and cross section are exposed as they are and are not suitable for practical use, and it is also proposed to coat the surface. Has been done. However, the sheet-shaped oxygen scavenger has a relatively low oxygen absorption capacity, and there is no general-purpose practical product like the conventional pouch-shaped oxygen absorber.

[0006]

DISCLOSURE OF THE INVENTION The object of the present invention is to
By utilizing the properties and morphological characteristics of the oxygen scavenger, it is possible to maintain the advantages of the conventional oxygen scavenger in a sachet while eliminating the disadvantages and to develop a new oxygen scavenger in the form of a general-purpose thin label. Especially. Moreover, this oxygen scavenger does not have the risk of contamination due to the oxygen spill of the oxygen scavenger and has microwave resistance without sparks or bag breakage even when used in microwave oven cooking, and is suitable for commercial production. The purpose of the present invention is to make it suitable for easy sticking and use, secure fixing, and suitable for automatic packaging work of oxygen absorber packaging. As described above, the conventional pouch-shaped oxygen scavenger has many drawbacks to be improved, and in view of the fact that there is no general-purpose practical product even for the sheet-shaped oxygen scavenger,
As a result of intensive studies, the present inventors have found that the above-mentioned problems can be solved by using a high-performance sheet-shaped oxygen absorber having a high surface oxygen absorption rate.

[0007]

The label-type oxygen scavenger of the present invention comprises a separator layer, a base layer having an adhesive layer, an oxygen scavenger layer, and a breathable layer, which are laminated in this order, and the oxygen scavenger is deoxidized. The label-type oxygen scavenger in which the breathable layer is directly adhered to the base layer at the outer edge of the peripheral edge of the layer without exposing the oxygen scavenger layer. Furthermore, the label-type oxygen scavenger of the present invention has a strip-shaped separator layer,
The label-type oxygen scavenger is a continuous body in which a laminate comprising a base layer having an adhesive layer, a deoxidizing layer and a gas permeable layer is intermittently adhered in series. A feature of the present invention is a laminated structure of a sheet-shaped oxygen scavenger that takes advantage of the characteristics of the sheet-shaped oxygen scavenger, which does not expose the deoxidation layer and easily peels off the separator layer. Can be used by pasting through the exposed adhesive layer,
This is a laminate structure of a single-sided absorbable label type oxygen absorber. The present invention will be described in detail below. In the present invention, the label-type oxygen scavenger is also referred to as the label-type oxygen scavenger in which the separator layer is peeled off.

(1) Separator layer: The separator layer is peeled off from the label type oxygen scavenger at the time of use and plays a role of protecting the adhesive surface of the base layer before use. It is also a layer which functions as a support material for continuous label formation in which label type oxygen scavengers are connected. Separator
As the layer, paper, film, metal foil or the like coated with a release agent such as silicone resin or paraffin wax can be used. The type of the release agent is selected so that a suitable releasability can be obtained according to the characteristics of the adhesive layer of the base layer.

The above-mentioned paper, film, metal foil, etc. may be any one as long as they satisfy the mechanical strength required for the production and use of the label type oxygen absorber or the continuous label type oxygen absorber. It is preferable to appropriately select in consideration of rigidity, shrinkage ratio, hygroscopicity, etc. so that a dimensional difference between the layer and the layer does not occur and warp, peeling, etc. do not occur, and paper is generally used. Further, in order to cope with the recent trend of dust-free food manufacturing environment, it is preferable to use a film or metal foil that does not generate paper dust during processing.

(2) Base layer: The base layer has at least an adhesive layer A, and is usually composed of a substrate having an adhesive layer A on one side and an adhesive layer B on the other side. However, it is also possible to adopt a configuration without the base material and the adhesive layer B. The structure of the base layer is appropriately selected according to the laminated structure of the label type oxygen absorber. For example, when the breathable layer to be described later has an adhesive layer, the adhesive layer A may be provided only on one surface of the substrate and the adhesive layer B may not be provided. Further, as the simplest structure of the base layer, since the adhesive layer A also serves as the adhesive layer B without the base material, the adhesive layer A alone can serve as the base layer. For example, a film-like pressure-sensitive adhesive single layer can be used as the base layer.

The adhesive layer A plays a role of adhering the base layer and the separator layer. Further, when the label-type oxygen absorber is used, the label-type oxygen absorber is adhered and fixed to the container via the adhesive layer A after peeling off the separator layer of the label-type oxygen absorber. Further, the adhesive layer B plays a role of adhering the base layer and the oxygen scavenger layer and / or the breathable layer. The term "adhesion" as used herein generally means that both surfaces to be adhered are fixed, including adhesion with an adhesive, adhesion with various adhesives and hot melt agents, and heat sealing with heat fusion. The same applies to adhesion in the breathable layer described below.
Means for providing an adhesive layer or an adhesive layer, coating,
Known conventional methods such as laminate can be applied.

As the substrate, a plastic film, non-woven fabric, paper or the like is used. Adhesive A is provided on one side of the substrate,
By providing an adhesive layer B on the other surface, if necessary,
Layer is formed. In particular, a method in which a thermoplastic resin film is laminated on a base material to form an adhesive layer B and then heat-sealed is also a preferable constitution. The same configuration can be adopted for the breathable layer described below.

In the case of a structure using a base material, various indications can be printed on the surface of the base material on the side of the adhesive layer B and the transparent adhesive layer B can be applied to provide the function of the display label. Printed labels such as product names and notes can be easily confirmed from the outside of the transparent container with the label type oxygen absorber laminate stuck inside. In addition, it is possible to conceal the inside of the label-type oxygen scavenger by using an opaque substrate, using an opaque base material, or using an opaque adhesive layer B or pressure-sensitive adhesive layer A for a beautiful appearance. It is preferable in the sense that it keeps and increases the commercial value.

In the present invention, the base layer is laminated so that the adhesive layer A is in contact with the separator layer and the adhesive layer B is in contact with the deoxidizing layer and the breathable layer, and the base layer is deoxidizing. It is directly bonded to the breathable layer so that the cross section is not exposed at the outer periphery of the layer.

(3) Deoxidizing layer: The deoxidizing layer contains a deoxidizer composition and is formed into a uniform flat sheet, that is, a so-called
It consists of a sheet-shaped oxygen absorber. The sheet-shaped oxygen scavenger used in the present invention as the oxygen scavenger layer is, of course, required to have a required oxygen absorption capacity, but the absorption surface of the label-type oxygen scavenger of the present invention is substantially only one surface. In particular, the surface has a high oxygen absorption rate and needs to have a practical speed rate.
The oxygen absorption rate of the sheet-shaped oxygen absorber is preferably 100.
ml / m ² · Hr (25 ° C) or higher, more preferably 200 ml /
It is at least m ² · Hr (25 ° C).

The thickness of the sheet-shaped oxygen scavenger is selected in the range of 0.05 to 4 mm, preferably in the range of 0.1 to 3 mm, depending on the workability during production and the purpose of use. You can The thickness and size of the sheet-shaped oxygen scavenger are appropriately selected according to the required oxygen absorption capacity.
Further, the shape of the oxygen scavenger layer can be freely processed according to the purpose of the sheet-shaped oxygen scavenger.

The sheet-shaped oxygen scavenger used as the oxygen scavenger layer can be used without any particular limitation on the oxygen scavenger composition and the production method as long as it meets the above conditions. The oxygen scavenger composition contained in the sheet-shaped oxygen scavenger is not necessarily limited as long as it can be processed into a sheet and achieves the purpose. For example, a metal component typified by iron or the like is used as a main component. As the oxygen scavenger composition, a metal oxygen scavenger, an organic oxygen scavenger containing an organic component represented by ascorbin, etc. as a main component can be used.

Examples of the deoxidizing layer include various sheet-like deoxidizing agents that have been conventionally proposed. For example, an oxygen scavenger composition containing iron powder, ferrous salt, ascorbic acid or a salt thereof, catechol, etc. as a main component dispersed in a thermoplastic resin, and further stretched. 2-7
No. 2851), a thermoplastic resin containing the oxygen scavenger composition obtained by foaming treatment (JP-A-56-26524), and a fibrous substance such as pulp disclosed in JP-A-2-86758. One in which the oxygen absorber composition is dispersed (JP-A-2-86758), one in which the mixture of the oxygen absorber composition and resin powder is pressurized and / or heated to be integrated, and the oxygen absorber composition Coating material blended with paper is coated on paper or plastic film, transition metal catalyst such as cobalt or iron is dispersed in resin such as polyolefin, polyamide, etc., film or sheet The one integrated into.

Among them, a thermoplastic polyolefin resin such as polyethylene is kneaded with an iron powder type oxygen scavenger, melted to form a sheet, and stretched to improve the oxygen absorption capacity (Japanese Patent Laid-Open No. 2-72851). (Japanese Unexamined Patent Publication (Kokai) No. 2-86758), a mixture of natural or synthetic pulp with an iron powder type oxygen absorber, thermoplastic polyolefin resin powder, etc., and heat-pressed to form a sheet (Japanese Patent Application Laid-Open No. 2-86758) is high oxygen content. It can be used as a deoxidizing layer because it has absorptive capacity, good processability, and excellent microwave oven resistance. In particular, the sheet-shaped oxygen scavenger obtained by dispersing the iron powder oxygen scavenger in a thermoplastic resin and heat-sealing the latter can be a label-type oxygen scavenger having more excellent microwave oven resistance.

The iron powder-based oxygen scavenger used in the above sheet-shaped oxygen scavenger contains iron powder as a main component and a metal halide salt, and if necessary, components such as activated carbon and sparingly water-soluble filler may be added. You can This iron powder type oxygen absorber is
A simple mixture of the above components may be used, but it is preferable to coat the surface of iron powder or a mixture of iron powder and activated carbon with a metal halide salt or disperse and adhere a metal halide salt.

As the iron powder, for example, reduced iron powder, electrolytic iron powder, atomized iron powder and the like are used, and the particle size thereof is preferably fine, and the particle size is usually 100 μm or less, preferably 50.
μm or less. Examples of the metal halide include sodium chloride, potassium chloride, barium chloride, calcium chloride, magnesium chloride and the like.

As the thermoplastic resin, low density polyethylene, high density polyethylene, polypropylene, ethylene-
An olefin resin such as α-olefin copolymer or polymethylpentene is used. The sheet-shaped oxygen scavenger is obtained by kneading the iron powder-based oxygen scavenger in an amount of 30 to 85% by weight with respect to 15 to 75% by weight of the above-mentioned thermoplastic resin, melting and forming a sheet, and stretching. The draw ratio is preferably 1.5 to 10 times.

The sheet-shaped oxygen scavenger may be either a water-dependent type or a self-reactive type, but the water-dependent type oxygen absorbing agent utilizing the water evaporated from the object to be stored is more advantageous in production and It is also preferable in terms of handling. Further, as the deoxidizing layer, a sheet-like oxygen scavenger may be laminated with a hydrous sheet layer for assisting oxygen absorption, and it has additional functions such as gas adsorption other than oxygen, gas generation, deodorization, etc. The composition for mixing may be mixed, or the layer containing these compositions may be laminated.

(4) Breathable layer: The breathable layer covers the deoxidizing layer to prevent contact with the object to be preserved, and at the same time, the deoxidizing layer absorbs oxygen so that it has air permeability and moisture permeability. It is a layer having a function of appropriately controlling.

As the breathable layer, a breathable material generally used as a packaging material for an oxygen absorber package can be used.
For example, a packaging material in which a perforated film is laminated on one side or both sides of paper, a waterproof non-woven fabric, a polyolefin microporous film,
Examples thereof include single-layer packaging materials such as synthetic paper, and laminated packaging materials including these single-layer packaging materials and other breathable films. Further, it is possible to use various cross-section breathable laminated packaging materials having a small surface breathability and utilizing the cross-section breathability. When the adhesion between the breathable layer and the base layer is a pressure-sensitive adhesive or an adhesive, as the breathable layer, a silicone resin, a fluororesin, a single layer film of polymethylpentene, or a fabric,
A material such as a single layer of paper that does not have high heat sealability can also be used. In addition, when the object to be stored is a liquid or a high water content, it is possible to prevent elution of rust and the like from the sheet-shaped oxygen scavenger by selecting a liquid-resistant breathable material.

In order to display characters, symbols, etc. on the surface of the breathable layer, a breathable laminated material of a transparent film having an outermost layer with or without holes is desirable, and an ink layer is positioned on the inner surface of the transparent film. , It is possible to prevent the ink from being transferred by contact with the material to be stored.

The air-permeable layer is fixed by adhering to the base layer via the adhesive layer of the base layer at the outer peripheral portion of the oxygen absorber layer. Therefore, the size of the breathable layer is such that the breathable layer completely covers one side and the cross section of the oxygen absorber layer, and the breathable layer and the base layer can be directly adhered to each other at the outer peripheral portion of the oxygen absorber layer. Need dimensions. It is also possible to provide an adhesive layer on the inner surface of the air-permeable layer and perform the adhesion via this adhesive layer.
In this case, it is preferable to take care so as not to impair the air permeability of the air permeable layer.

In the label-type oxygen scavenger of the present invention, the separator layer, the base layer, the oxygen scavenger layer and the breathable layer are laminated in this order, and the breathable layer is directly applied to the peripheral portion. It is formed by adhering to the outer layer. Furthermore, a continuous body of label-type oxygen scavenger is obtained by intermittently adhering a laminate composed of a base layer having an adhesive layer, a deoxidizing layer and a breathable layer to a strip-shaped separator layer. Is formed.

The label-type oxygen scavenger of the present invention constructed as described above has a flat surface having a smooth and thin surface and flexibility. The label-type oxygen scavenger has a good sticking and fixing property, does not give a feeling of strangeness, and it is better to use a thinner label-type deoxidizer in order not to hinder the winding of the continuum and the handling by the sticking machine. The thickness of the oxygen agent is 0.1 to 5 mm, preferably 0.3 to 3
mm. Further, the shape of the label-type oxygen scavenger can be processed according to the purpose of use, and for example, can be freely selected from a square shape, a rectangular shape, a circular shape, an elliptical shape, and the like.

To produce the label-type oxygen scavenger of the present invention, for example, the following method is adopted. (1) A separator layer is adhered to one side in advance and a deoxidizing layer is adhered and fixed to the adhesive surface of a base layer with a separator layer having an adhesive surface on the other side, and then a breathable layer is formed thereon. The base layers are laid over to completely cover and pressed to fully adhere the breathable layer to the base layers. Then, the outer side of the peripheral edge of the deoxidizing layer is die-cut (half punched) from the top to the base layer with a punching die, and finally, half punching is performed to separate the extra outer base layer and breathable layer. A label-type oxygen scavenger can be manufactured by peeling off from the target layer.

(2) A base layer with a separator layer having a separator layer on one side and a heat sealant surface on the other side is prepared. A deoxidizing layer is held under the breathable layer, and is superposed on the heat sealant surface of the base layer with a separator layer. From above, a heating jig having a predetermined shape is pressed to heat-bond the base layer and the air permeability at the outer peripheral portion of the deoxidizing layer. Finally, use a die to separate the outer edge of the heat-bonded part with a separator.
The label-type oxygen scavenger can be produced by half-bleaching leaving the layer and peeling off the semi-blanked outer excess base layer and breathable layer from the separator layer.

(3) A deoxidizing layer is bonded to the breathable adhesive surface of the breathable layer provided with the breathable adhesive surface. On top of this, a base layer having a separator layer adhered on one side is superposed, and the base layer and the breathable layer are bonded to each other at the outer peripheral portion of the deoxidizing layer via the breathable adhesive surface. Finally, the label-type oxygen scavenger can be manufactured by half-cutting the outer edge of the adhesive part with a punching die and peeling off the semi-blanked outer portion from the separator layer.

By any of the above-mentioned methods, it is possible to easily obtain a continuous body of the label type oxygen scavenger in which the label type oxygen scavenger is intermittently continuous on the strip-shaped separator layer. Can be made continuous. Of course, an individual product can be obtained by punching out the punching die up to the separator layer without half-cutting by the above method. In addition, individual products can be manufactured by cutting the continuous body. still,
The method for producing the label-type oxygen scavenger of the present invention can be appropriately selected as long as it satisfies the constitution of the present invention, and is not limited to the above method.

[0034]

EXAMPLES Next, examples will be described in more detail. still,
The invention is not limited to this example. Example 1 Iron powder coated with sodium chloride at a ratio of 3 parts by weight to 100 parts by weight of iron powder (average particle size 70 μm) 1
00 parts by weight and 100 parts by weight of polyethylene were kneaded and extruded at 190 ° C. to form a sheet, and then stretched 4 times in the longitudinal direction to obtain a sheet-shaped oxygen scavenger having a thickness of 1 mm. The obtained sheet-shaped oxygen absorber has an oxygen absorption rate of 200 ml / m ² · Hr (2
It had a high absorption performance of 5 ° C or higher. This high performance sheet-shaped oxygen absorber was cut into an elliptical shape having a long diameter of 52 mm and a short diameter of 30 mm to prepare an oxygen absorber layer.

With a coater, a synthetic rubber elastomer adhesive is applied to one surface of a milky white polypropylene film (thickness 40 μm) to form an adhesive layer, and a silicone coated paper as a release paper is attached to this surface. Then, the same adhesive was applied to the other surface of the polypropylene film to obtain a base layer (50 × 100 mm) with a separator layer. Further, a highly breathable pressure-sensitive adhesive sheet (manufactured by Nitto Denko Co., Ltd.), which is a fibrous pressure-sensitive adhesive, is attached to water- and oil-resistant paper, and the long diameter 6
An air-permeable layer was prepared by punching into an oval shape of 4 mm x 40 mm in minor axis. Next, the elliptical oxygen absorber layer was placed on the adhesive surface of the elliptical breathable layer, and pressure-bonded so that the elliptical peripheral portion of the breathable layer was left. Furthermore, the oxygen scavenger layer obtained by pressure bonding the breathable layer to the exposed adhesive surface of the base layer with the separator layer is combined so that the peripheral portion of the breathable layer is completely adhered to the base layer. Crimped. Finally, it was punched into an elliptical shape of the same size in accordance with the elliptical shape of the breathable layer with a punching die to obtain an elliptic label type oxygen absorber (64 × 40 mm, thickness 2 mm).

KON (15 μm) / PE (20 μm) /
3-way seal bag (180 x 250 mm) made of gas barrier film composed of LLDPE (60 μm)
The label-type oxygen scavenger was fixed by adhering the adhesive surface on the inner surface of which the separator layer of the label-type oxygen scavenger was peeled off. 200 g of boiled udon noodles was immediately put in the bag to which the label-type oxygen scavenger was adhered, and the bag mouth was heat-sealed and sealed. Similarly, three udon packaging bags to which the label type oxygen absorber was attached were prepared. 25 of the above 3 udon packaging bags
It was stored in a room at ℃. After 10 days, the properties of the udon were observed and the oxygen concentration in the bag was measured by a gas chromatograph. Further, the bag was opened and hung upside down, and the udon was placed in a pan to examine the falling condition of the udon. The results are shown in Table 1.

Example 2 Except that a water- and oil-resistant paper was used as the air-permeable layer and a highly air-permeable adhesive sheet was not used,
In the same manner as in Example 1, an elliptic label-type oxygen scavenger of 60 × 40 mm was obtained. Using this label type oxygen absorber,
In the same manner as in Example 1, the storage test of the udon packaging bag and the opening test after storage were performed. The results are shown in Table 1.

[Comparative Example 1] The same dimensions as in Example 1 were used except that the dimension of the breathable layer in Example 1 was an ellipse having the same major axis 52 mm x minor axis 30 mm as the oxygen absorber layer. The breathable layer and the oxygen absorber layer were superposed on each other, and finally, an elliptical label-type oxygen absorber having a major axis of 52 mm and a minor axis of 30 mm was obtained. The oxygen absorber layer was exposed on the cross section of the obtained label-type oxygen absorber. Using this label-type oxygen scavenger, the storage test of the udon packaging bag and the opening test after storage were performed in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 2] A commercially available oxygen absorber contained in a small bag (Mitsubishi Gas Chemical Co., Ltd., Ageless S-100, 50 x 45 mm).
10 x 25 mm double-sided adhesive tape on the center of one side of the rectangle)
(Nitto Denko, No.500) is attached, and a small bag-shaped oxygen scavenger is used as a gas barrier property through this double-sided adhesive tape.
It was attached and fixed to the inner side of a square seal bag (180 x 250 mm). Using a bag to which a pouch-shaped oxygen scavenger was adhered, the storage test of the udon packaging bag and the opening test after storage were performed in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 3 A gas barrier property 3 was obtained in the same manner as in Example 1 except that no oxygen absorber was used.
Boiled udon was packaged in a square seal bag, and a storage test of the udon packaging bag and an opening test after storage were conducted. The results are shown in Table 1.
Shown in.

As shown in the results of Table 1, except for Comparative Example 3 in which no oxygen scavenger was used, the quality of the udon was maintained for the time being due to the effect of the oxygen scavenger. However, in Comparative Example 1, iron in the oxygen scavenger composition became rust from the exposed cross section of the oxygen scavenger layer and was eluted to contaminate the udon. Further, in Comparative Example 2 using the conventional oxygen scavenger in a small bag, when the udon was thrown in from the udon packaging bag, the udon was caught by the oxygen scavenger, or the oxygen scavenger attached by the hook of the udon There was some inconvenience in the work such as the fixing was removed and it was mixed in the udon. From the results of Table 1, it can be evaluated that the label-type oxygen scavenger of the present invention is an oxygen scavenger excellent in quality retention effect, workability in use, and practicality.

[0042]

[Table 1]

Example 3 The same high-performance sheet-shaped oxygen scavenger as that used in Example 1 was punched into a circle of 20 mmφ with a punch to prepare an oxygen scavenger layer. On the other hand, with a coater, a synthetic rubber elastomer-based pressure-sensitive adhesive is applied to the non-woven fabric surface of a substrate composed of non-woven fabric (50 g / m @ 2) / PE (100 .mu.m) to form a base layer. A separator layer made of a silicone resin coated polyethylene film was attached to the adhesive surface of the separator layer to obtain a base layer with a separator layer. Further, a fluorine-based water and oil resistant agent (Asahi Guard AG-650 manufactured by Asahi Kasei Co., Ltd.) was applied to one surface of an HDPE nonwoven fabric (Tyvek manufactured by DuPont) to form a breathable layer, which was punched into a circle of 30 mmφ with a punch. Next, using the above-obtained material, a circular label type oxygen absorber was manufactured by a sealer having a donut-shaped hot plate (outer diameter 30 mm, inner diameter 28 mm). First, a base layer with a separator layer is placed on a seal stand with the separator layer facing downward, and the circular deoxidizer is placed on the base layer so that the circular centers of the hot plates are aligned with each other. The agent layer (20 mmφ), then the Tyvek surface face down, the breathable layer (30 mmφ) are placed, and finally the hot plate is lowered to let the HDPE non-woven fabric as the breathable layer and the non-woven fabric of the base layer pass through the PE layer. -To seal, round label type oxygen absorber (30m
mφ) was obtained.

Metal lug cap with PVC seal (diameter 6
Glass bottle with a lid of 5 mm (internal volume approx. 170 cc)
Was prepared, and the circular label type oxygen absorber was peeled off the separator layer and attached to the central portion of the inner surface of the rug cap. Put 150 cc of orange juice in a glass bottle, seal with a rug cap with a label type oxygen absorber attached to the inside, and then
It was stored at 5 ° C for 7 days. After measuring the oxygen concentration of the head space in a glass bottle containing orange juice stored for 7 days by a gas chromatograph, the glass bottle was opened and the color tone and flavor of the orange juice were evaluated. The results are shown in Table 2.

In the orange juice storage test of [Comparative Example 4], an orange juice storage test was carried out in the same manner as in Example 3 using a glass bottle with a rug cap in which no oxygen absorber was attached to the rug cap. The results are shown in Table 2.

[0046]

[Table 2]

[Embodiment 4] A base material layer having a width of 40 mm and a length of 500 mm and having a separator layer was used in the same manner as in Embodiment 1 except that a long material was used. A breathable layer having a width of 40 mm and a length of 500 mm was prepared in the same manner as in Example 3 except that a long material was used. Base layer with a long separator layer prepared above (width 40 m
(m × length 500 mm), the same circular oxygen scavenger layer (20 m) as that used in Example 3 was provided in the widthwise central portion of the exposed adhesive surface.
mφ) 12 pieces at 40 mm intervals in the length direction, 15 at both ends
mm The pressure-sensitive adhesive surface was left unbonded. Further, from above, the long breathable layer was formed on the Tyvek surface with the oxygen absorber layer and the base.
They were stacked so as to fit the base layer, and pressure-bonded so that the breathable layer and the base layer were completely adhered in the absence of the oxygen absorber layer. Finally, using a 30 mmφ punch, the punch and the circular oxygen scavenger layer were made to coincide with each other in the center of the circle, and the breathable layer and the base layer were removed so that only the separator layer was left and half punched one after another. Finally, the outer breathable layer and the base layer were peeled off from this half-cut laminated material, and a piece of silicone-coated paper (width 4
A continuous body of 12 continuous label-type oxygen scavengers (30 mmφ) was obtained on 0 mm × length 500 mm). 1 cm of the obtained label-type oxygen scavenger continuum
The label is wrapped around a paper tube with an internal diameter of 1 inch and the rubber feed roller is manually rotated to attach it to a manual label applicator (U-touch 303W, manufactured by Kanebun). I was able to do it.

Example 5 The separator layer of the elliptical label type oxygen scavenger (64 × 40 mm, thickness 2 mm) produced in Example 1 was peeled off, and KON (15 μm) / PE (5) was peeled off.
A label type oxygen scavenger was attached and fixed to the inner surface of a three-way seal bag (180 × 250 mm) made of a gas barrier film having a thickness of 0 μm). 100g of chicken nugget was put into this bag with the label type oxygen scavenger attached, and the bag mouth was opened.
And sealed. 10 chicken nugget packaging bags above
It was stored for 10 days under the condition of 3,000 lux fluorescent lamp irradiation at ℃. First, the appearance of the chicken nugget in the packaging bag after 10 days was examined and the oxygen concentration in the bag was measured by a gas chromatograph. Further, the chicken nugget packaging bag was put in a microwave oven (500 W, manufactured by Mitsubishi Electric Corp.) as it was, irradiated with microwaves for 90 seconds for heating and cooking, and then the packaging bag was opened and enclosed with the label type oxygen scavenger. And a sensory test of chicken nuggets. The results are shown in Table 3.

[Comparative Example 5] In Example 5, instead of the label-type oxygen scavenger, the same oxygen scavenger in a sachet as in Comparative Example 2 (Ageless S-100, manufactured by Mitsubishi Gas Chemical Co., Inc.) was used for the double-sided adhesive tape.
A storage test and a microwave resistance test of chicken nuggets were carried out in exactly the same manner except that the chicken nuggets were stuck and fixed to the inside of a gas barrier three-way seal bag using a container. The results are shown in Table 3.

[Comparative Example 6] A gas barrier property 3 was obtained in the same manner as in Example 5 except that no oxygen absorber was used.
Chicken nuggets were packed in a rectangular seal bag, and a storage test and a microwave resistance test of the chicken nuggets were carried out. The results are shown in Table 3.

[0051]

[Table 3]

[0052]

The label-type oxygen scavenger of the present invention is a laminate in which the oxygen scavenger layer made of a sheet-shaped oxygen scavenger is not exposed.
It is a novel label-like single-sided absorption type oxygen absorber which can be used by easily peeling off the separator layer. The present invention utilizes the characteristics of the sheet-shaped oxygen absorber in a single-sided absorption type,
This label-type oxygen absorber has excellent oxygen absorption performance, and is also low in cost due to the rational material configuration of the laminate.

The label-type oxygen scavenger has a smooth and thin surface, so that it can be securely fixed at the time of use, and it does not give a feeling of strangeness because it does not have a thickness and a feeling of volume, and it also hinders the loading and unloading of packaged articles. Nor. Further, unlike the conventional oxygen scavenger in a small bag, there is no risk of the granular oxygen scavenger spilling out due to bag breakage, and there is no leaching of iron rust, resulting in extremely excellent safety and hygiene. Furthermore, in terms of morphology, it is possible to freely adapt the shape according to the form and application of the packaging container,
In addition, it is possible to print the display that can be seen from the packaging container, and it has excellent design. Further, the label-type oxygen scavenger of the present invention,
Even if it is used for cooking with a microwave oven together with the food package,
It can be suitably used for microwave-cooked foods without sparking or bag breaking.

Further, according to the present invention, the label type oxygen scavenger can be easily continuous and can be produced commercially. Furthermore, this label-type oxygen absorber can mechanically perform peeling and attachment of the separator layer using various manual and automatic labeling machines. It contributes to labor saving. That is, the label-type oxygen scavenger of the present invention is a completely new type oxygen scavenger having many characteristics and is a practical oxygen scavenger that can be widely applied to various fields.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a label type oxygen absorber continuous body.

FIG. 2 is a cross-sectional view of one embodiment of a label type oxygen absorber.

FIG. 3 is a cross-sectional view of one embodiment of a label type oxygen absorber.

[Explanation of symbols]

 1 Label-type oxygen absorber 10 Breathable layer 11 Breathable packaging material 12 Breathable adhesive layer 20 Deoxygenation layer 21 Sheet-shaped oxygen absorber 30 Base layer 31 Adhesive layer 32 Base material 33 Adhesive layer 40 Separator − Layer

Claims (5)

[Claims] 1. A separator layer, a base layer having an adhesive layer, a deoxidizing layer, and a breathable layer are laminated in this order, and the breathable layer is directly on the outer peripheral portion of the peripheral edge of the deoxidizing layer. Label-type oxygen scavenger that does not expose the oxygen scavenger that is adhered to the layer. 2. The oxygen absorbing layer has an oxygen absorption rate of 100 ml / m ² ·
A sheet-shaped oxygen scavenger having a Hr (25 ° C.) or higher.
Label-type oxygen scavenger as described. 3. The label according to claim 1, wherein a laminate comprising a base layer having an adhesive layer, a deoxidizing layer and a breathable layer is intermittently adhered to the strip-shaped separator layer. Type oxygen absorber. 4. The deoxidizing layer has an oxygen absorption rate of 100 ml / m ² ·
4. A sheet-shaped oxygen scavenger having a Hr (25 ° C.) or higher.
Label-type oxygen scavenger as described. 5. The label mold according to claim 1, wherein the deoxidizing layer comprises a sheet-shaped deoxidizing agent obtained by kneading an iron powder type deoxidizing agent into a thermoplastic resin, sheeting and stretching. Oxygen absorber.