JPH0329751A - Packing material for deoxidizer - Google Patents

Abstract

PURPOSE:To obtain a material with excellent abilities for packing deoxidizer by forming a laminate of films with a specified aqueous emulsion used as the adhesive. CONSTITUTION:A porous plastic film A is pasted together with a material B which is a nonwoven fabric with fine pores impermeable to water under atmospheric pressure or a plastic film consisting of a fine porous membrane or a water resistance- and oil resistance-finished paper; the adhesive employed for pasting A and B is an aqueous emulsion of such a material as a cross-linking acrylic resin, a hydrophobic polyester, or an alkyd resin; on one surface of B there is formed a porous membrane with fine pores of nonwoven fabric or a resin formed in an arrangement of a multiplicity of ribs or in a pattern of fine net and having a softening point equal to or lower than the softening point of the water resistance- and oil resistance-finished paper. A packing material obtained, having Gurley air permeability of 1-10,000sec/100ml, is used for a part or all of a packing material for deoxidizer. Deoxidizer is packed in it with the A on the outer side and sealed. This packing material can be manufactured and formed into a bag in an easy manner and the product obtained exhibits stability in air permeability, sealing strength, and laminate strength, and an excellent durability.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a specific water emulsion adhesive in the adhesive layer of a laminated film, and uses a specific water emulsion adhesive on the sealing side of a nonwoven fabric, a microporous membrane, or a water- and oil-resistant treated paper. This invention relates to an oxygen absorber package characterized by using a packaging material in which resin is shaped into many stripes or fine nets. For more details,
The packaging material for oxygen absorbers is easy to manufacture and form bags, and it not only has stable air permeability, sealing strength, and lamination strength, but also has excellent durability such as water resistance and oil resistance, so it has stable oxygen absorbing performance. The present invention provides an oxygen absorber package that exhibits the following properties.

[Conventional technology]

Oxygen scavengers are made of a composition that has the property of absorbing oxygen, and are usually used by being enclosed in a breathable pouch.

In general, the packaging materials that make up breathable sachets include, for example:
Packaging materials that are used include paper and perforated polyethylene film laminated together, perforated plastic film, paper, and perforated polyethylene film laminated together, and nonwoven fabrics or porous membranes used. However, there is a problem with oxygen absorber storage technology for oxygen absorber packaging materials, as oxygen absorbers are used in various foods such as dry foods, high moisture foods, acidic foods, oil-processed foods, and alcohol-containing foods. The moisture contained in the oxygen scavenger composition transfers to the dried food, impairing its oxygen scavenging performance, and the moisture in high-moisture foods transfers to the oxygen scavenger composition, causing stains on the surface of the packaging material. Food oils may seep into the packaging material, impairing its air permeability and deoxidizing performance. Due to these drawbacks, the material structure of the packaging material has been changed depending on the situation in which the oxygen absorber is used, but it is not a perfect packaging material for oxygen absorbers.

In addition, the film laminate is generally thermally laminated with a low melting point sealant film made of polyethylene, polyethylene vinyl acetate copolymer, ionomer resin, etc. as an adhesive layer, but this method can be used in the present invention. When used, the low melting point film melts during thermal lamination,
It was found that the small diameter pores of the perforated plastic film (A) were blocked, resulting in a decrease in air permeability, and that it was difficult to provide stable air permeability. In addition, when the low-temperature rayonate 1 condition was adopted to ensure air permeability, it was not possible to obtain sufficient rayonate strength. In other words, it was difficult to laminate the laminate film with the small opening diameter, which is a feature of the present invention, using conventional thermal lamination processing. [Problems to be Solved by the Invention] The present invention is not only easy to manufacture and form bags, and has stable air permeability, seal strength, and laminated strength.
The purpose of the present invention is to provide an oxygen absorber packaging material that has excellent durability such as water resistance and oil resistance, and can exhibit stable oxygen scavenging performance. [Means for Solving the Problems] The present invention provides a perforated plastic film (A), a plastic film that is a hand-woven fabric or a microporous membrane that has micropores and does not allow water to pass through under normal pressure, or a water- and oil-resistant film. Processed paper (B)
In the packaging material for an oxygen absorber made by laminating (A)
and (B) are bonded together using a water emulsion adhesive consisting of a crosslinkable acrylic resin, a water-breakable polyester resin, an alkyd resin, a polyamide resin, a polyurethane resin, an epoxy resin, a melamine resin, or an emulsion of a phenolic resin. On one side, a resin having a softening point equal to or lower than that of the above-mentioned non-woven microporous membrane or water- and oil-resistant treated paper is formed in the form of numerous stripes or fine lines, and has a Gurley air permeability. l~10,00
A packaging material characterized by 0 seconds/100- is used as all or part of the packaging material for the oxygen absorber, and the above (
This is an oxygen absorber package characterized in that the oxygen absorber is packaged and sealed with A) facing outside (see Figures 3 and 4). When the above packaging material is used as part of a package, either a breathable or non-breathable film (including a laminated film) can be used for the other parts of the package (see Figure 4). The present invention will be explained in detail below. (1) Perforated plastic film (A) As the perforated plastic film (A) of the present invention, for example, polyethylene terephthalate, nylon, polypropylene film, etc. are used. In addition, the plastic film (A)
may be a laminated film of two or more layers, and the first layer is usually one that has a softening point higher than the other layers by 10° C. or more. In this case, the first layer is polyethylene terephthalate, nylon, polypropylene, etc., and the other layers are LLDP.
E, polypropylene, nylon, etc. As other layers, sealant films with good low-temperature heat sealability such as LDPE, EVA copolymer, and ionomer films are not suitable.

Lamination of films can be produced by fusing, adhesion, pressure bonding, dry lamination, extrusion lamination, or the like.

Further, the thickness of the film is 10 to 200 μm, preferably 12 to 50 μm, and the pore size of the film is 10 to 500 μm.
m, preferably 50 to 250 #m. If the pore size of the film is less than 10 μm, the air permeability will decrease;
If the diameter is 00 μm or more, liquids such as water, oil, acid, alcohol, etc. will easily enter from the outside, and the durability will be poor, which is undesirable. On the other hand, if the thickness of the film is less than 10 μm, it is too thin and not only difficult to process, but also has poor durability, and if it is more than 500 μm, the flexibility of the film is undesirable.

(2) Nonwoven fabric A nonwoven fabric made of polyolefin, polyester, etc., with a Gurley air permeability of 0.01 to 10.000 seconds/1.
0 0 rzl and does not allow water to pass through at normal pressure. For example, Tyvek (manufactured by DuPont) and Luxar (manufactured by Asahi Kaei Kogyo ■) are known.

(3) m-porous membrane with micropores, a pore diameter of 0.01 to 50 tlm, a Gurley air permeability of 0.01 to 10,000 seconds/100, and does not allow water to pass through at normal pressure. be. Microporous membranes are produced by stretching polyethylene, polypropylene, or other synthetic resin films. It is manufactured by extraction or stretching of fine powder. For example, NF Sheet (manufactured by Tokuyama Soda), Cellbore (manufactured by Sekisui Chemical), FP-2 (manufactured by Asahi Kasei), N
Known examples include OP (manufactured by Nippon Petrochemical Corporation), Nitoflon NTF (manufactured by Nitto Electric Industries, Ltd.), Polyflon Baber (manufactured by Daikin Industries, Ltd.), Gelagard (manufactured by Celanese Corporation), and Goatex (manufactured by Gore Corporation). ing. (4) Water- and oil-resistant treated paper Generally referred to as oil-proof paper, moisture-proof paper, wet-proof paper, water-resistant and water-repellent paper, etc. Specifically, coated printing paper (art paper, coated paper, gravure paper, etc.), information recording paper, electrical insulation paper, release paper, hoof paper, corrugated paper, folding carton paperboard, base paper for decorative laminates, and processing for food packaging. Among various papers such as paper and carton paper for food packaging, those belonging to processed paper for food packaging and mixed paper of paper and plastic are suitable. In addition, processed paper includes acid-treated chemically treated paper such as parchment paper, WS paper, MC paper,
Filter paper, glassine paper, WOP paper, etc., which are made with synthetic resin, etc., and coated paper (wax paper, etc.)
Fluorine processed paper, vinylidene chloride processed paper, PvC processed paper,
(PE treated paper, lacquer coated paper, etc.), laminated paper, and other papers that undergo physical processing after papermaking. Processed paper suitable for the present invention is cardboard having a basis weight of 10 to 100 g/n4, preferably 20 to 60 g/n4, which has been treated with water and oil resistance by the method described above.

If the surface area is too small, workability and durability will be poor, and packaging materials that are too large will be too stiff, making it difficult to fill with oxygen scavenger. (5) Water emulsion adhesive Water emulsion adhesive is a water-based synthetic resin emulsion in which fine resin particles are dispersed in water as colloidal particles or coarser particles to form an emulsion, and are used as adhesives. For example, polyvinyl acetate, copolymers of vinyl acetate and ethylene, vinyl uralylate, maleic acid long chain esters, acrylic esters, etc. polyacrylic acid, polymethacrylic acid, acrylic acid and acrylic acid alkyl esters, MMA% Copolymers with AN etc.
Polymers of unsaturated carboxylic acids such as acrylic acid and methacrylic acid, N-methylol acrylic acid comonopolymer, polyvinyl chloride, vinyl rubylidene chloride chloride copolymer, polyamide, butyral resin, alkyd resin, phenolic resin, melamine resin, Glyoxazal resin, epoxy 4M resin, polyester resin, polyurethane resin,
There are emulsions of natural rubber and synthetic rubber such as butadiene-acrylonitrile copolymer.

However, common water emulsion adhesives, such as polyvinyl acetate emulsions, cannot be used for this purpose because they have poor creep resistance, water resistance, collection resistance, and adhesion to hydrophobic materials. The water emulsion adhesive used in the present invention includes crosslinkable emulsions, thermosetting resin condensates, thermoplastic polymers, etc. that have been introduced with unsaturated carboxylic acid groups to improve adhesion to hydrophobic materials. It is a resin emulsion with improved water resistance, chemical resistance, etc. Furthermore, the coated surface must be tack-free after coating and drying.

Specifically, acrylic acid alkyl ester, MMA, A
Cross-linkable acrylic resin, polyester 4, in which functional groups such as unsaturated carboxylic acids such as acrylic acid and methacrylic acid, N-methylol acrylamide, acrylamide, and glycidyl methacrylate are introduced using N as a copolymer component.
It is a resin emulsion made of M resin, alkyd resin, polyad resin, polyurethane resin, epoxy resin, melamine resin, or phenol resin.

Particularly desirable among these are resin emulsions made of hydrophobic polyester resins, polyurethane resins, epoxy resins, and crosslinkable acrylic resins. In addition, with water emulsion adhesives, when water is lost during the coating and drying process, the resin particles fuse with each other and adhere to the adherend, forming a densest arrangement, which reduces the air permeability of the film (B). However, by reducing the amount of water emulsion adhesive applied, it is possible to ensure the air permeability of the film (B). In relation to the adhesive strength of the film, the coating amount of the water emulsion adhesive is Ig/rrl to 20 g/m2, preferably 3 to 15 g/nf in terms of solid content. The specific application amount is automatically determined based on the correlation between Gurley's air permeability and adhesive strength.

(6) Film lamination method After coating the air-permeable film (B) with a water emulsion adhesive and drying it, the perforated plastic film (A) is adhered by heat lamination. At this time, it is possible to change the air permeability of the film (B) by adjusting the amount of water emulsion adhesive applied. For example, air permeability decreases in inverse proportion to the amount of coating applied. On the other hand, if the amount of coating is extremely reduced, the laminated strength between the perforated plastic film (A) and the air-permeable film (B) will decrease, making it impractical for practical use. (7) Resin on the film The above-mentioned nonwoven fabric,
Examples of resins having a softening point equal to or lower than that of the microporous membrane or water- and oil-resistant treated paper include polyethylene, ethylene-vinyl acetate copolymer, ionomer resin,
One or more resins selected from polypropylene etc. are melted at about 300℃ and extruded into
It is applied in many stripes on one side of the nonwoven fabric or microporous membrane using techniques such as coating or coating (see Figures 1 and 2). The streak-shaped resin part formed in this way not only reinforces the packaging material and adjusts air permeability, but also functions as a sealing layer during bag making. Sealing methods include heat sealing. The adhesive strength of the oxygen scavenger packaging material used in the present invention during bag making varies depending on the seeding of the resin in the form of streaks, the amount of resin, heat sealing conditions, etc. In particular, if the amount of resin is extremely small, the adhesive strength will be insufficient and the product will not be usable. On the other hand, if there is too much, it is difficult to ensure air permeability.

In addition, the air permeability of the oxygen scavenger packaging material in the present invention is first determined by the type of microporous membrane or nonwoven fabric used and the shape of the resin applied in the form of stripes. In particular, it is determined by the size of the area where resin is not applied. The shape pattern of the striped resin is designed based on various factors such as the air permeability of the oxygen absorber packaging material, adhesive strength, ease of bag making, and ensuring that the sealed oxygen absorber does not spill. It can be determined by That is, the amount of resin is 7 to 70 g/m2, preferably io to 50 g/m2, and the area of the resin part formed in the form of streaks is 30 to 90% of the whole, and the area between the resin parts formed in the form of lines is 30 to 90% of the whole. The width of the application area is 20 to 1,000 am,
Preferably, it is 50 to 800 μm. In other words, if the amount of resin is less than 7 g/rrl, the adhesive strength will be poor, and if the area of the resin part formed in a streaky shape is less than 30%, the oxygen absorber filled in the seal part may spill,
There is a risk that liquid may flow in from the outside, and if the width of the unapplied part of the resin is less than 20 μm, not only will the air permeability decrease, but it will also be difficult to apply it evenly in streaks, making it difficult to apply the resin. The oxygen absorber's temperature is unstable, making it unsuitable as the oxygen absorber packaging material of the present invention. The Gurley air permeability of the oxygen absorber packaging material thus obtained is 1 to 10,000 seC/1.
It is in the range of 0 0d.

(8) Processing of resin into a film into a wire-like shape Using a resin such as polyethylene, ethylene-vinyl acetate copolymer, ionomer resin, polypropylene, etc., which has a softening point equal to or lower than that of the above-mentioned nonwoven fabric, microporous membrane, or water- and oil-resistant treated paper. , melted at about 120 to 200° C., and applied in the form of a fine mesh onto one side of the nonwoven fabric, microporous membrane, or water- and oil-resistant treated paper by printing such as gravure printing or coating.

The fine mesh-shaped resin portion formed in this manner not only reinforces the packaging material and adjusts the air permeability, but also functions as a sealing layer during bag making. Sealing methods include heat sealing. The adhesive strength of the oxygen scavenger packaging material in the present invention during bag making varies depending on the type of resin formed in the fine mesh shape, the amount of resin, heat sealing conditions, etc.

In particular, if the amount of resin is extremely small, the adhesive strength will be insufficient and the product will not be usable. On the other hand, if there is too much, the printed surface becomes uneven and unclear, making it difficult to ensure air permeability.

In addition, the air permeability of the oxygen scavenger packaging material in the present invention first depends on the type of nonwoven fabric, microporous membrane, or water- and oil-resistant treated paper used, that is, the air permeability inherent to these packaging materials. It is determined by the shape of the resin mesh, which is applied in the form of a rope. In particular, it is determined by the size of the area where resin is not applied. The mesh pattern of the resin is determined by considering various factors such as the air permeability of the oxygen absorber packaging material, adhesive strength, ease of bag making, and ensuring that the sealed oxygen absorber does not spill. You can decide accordingly. That is, the amount of resin is 7 to 10
g/rd, preferably 10 to 40 g/rtt, the area of the resin part shaped like a wire is 60 to 90% of the whole, and the mesh of the unapplied part between the resins formed in the shape of a wire is , 50
It is desirable that it be 0 μm or less. In other words, if the amount of resin is less than 7 g/rrf, the contact 5R@ degree will be poor, if the area of the resin part shaped like a wire is less than 60%, and if the part where the resin is not applied has a grain of more than 500 μm, it will be sealed. There is a risk that the oxygen absorber filled in the tank may spill or liquid may flow in from outside. In addition, the mesh in the area where resin has not been applied must be large enough to prevent it from being difficult to apply in a uniform mesh, resulting in decreased air permeability, and instability. The Gurley air permeability of the oxygen absorber packaging material thus obtained is 1-10.000 s.
The range is e c / 100 d. In addition, the oxygen scavenger filled in the packaging material contains sulfite, hydrogen sulfite, dithionite, hydroquinone, catechol, resorcinol, pyrogallol, gallic acid, metal powder such as iron powder, ascorbic acid, etc. Those that do are used.

〔Example〕

Examples 1 to 3, Comparative Examples 1 and 2 A solid content of 10 g of hydrophobic polyester emulsion adhesive (manufactured by Toyobo Mi) was applied to WOP paper (basis weight 40 g/rd).
/nl coated on one side and dried to leave the coated surface tack-free. Next, a perforated PET film with a pore diameter of 100 μm (a 12 μm thick film with holes in a grid of 2 x 2 m/m) and the adhesive-coated surface of WOP paper were laminated at 100 to 120°C. , made a laminated film. On top of this laminated film WOP, low-density polyethylene was extruded in stripes through the pores of an extrusion processing device at a speed of about 100 m/min, after being heated and melted at about 300°C, and laminated (Example 1). In addition, by changing processing conditions such as coating speed, pore diameter and spacing, and melting temperature, we created packaging materials with different application conditions, striped resin widths, and thicknesses. Example 4 Instead of the WOP paper used in Example 1, a film thickness of 120 μm was used.
A laminated film was produced in exactly the same manner as in Example 1, except that cell bore (microporous FF5F manufactured by Sekisui Chemical Co., Ltd.) was used. Example 5 Instead of the perforated PET film used in Example 1, a perforated (PET/NY) film (2 x 2 m) with a pore diameter of 100 μm was used.
A laminated film was produced in exactly the same manner as in Example 1, except that a 42 μm thick film with lattice-like openings of 1.5 mm/m was used. Example 6 The adhesive used in Example 1 was added to acrylic emulsion (manufactured by Kanebo NSC), and WOP paper was added to Tyvek 1059.
(Dupont nonwoven fabric), a laminated film was made by laminating in exactly the same manner as in Example 1. Comparative Example 3 In Example 1, the coating amount of the hydrophobic polyester emulsion adhesive (manufactured by Toyobo M) was 30 g/r in terms of solid content.
A laminate film was produced in the same manner as in Example 1 except for the procedure d.

Comparative Examples 4 to 8 In Example 1, laminate films were produced in exactly the same manner as in Example 1, except for the following changes (1) to (5). (1) The pore diameter of porous PET is lm (Comparative Example 4) (2)
The basis weight of WOP paper is 170g/rrr (Comparative Example 5) (3)
WOP paper was replaced with Japanese paper (basis weight 40 g/box) (Comparative Example 6) (4) Hydrophobic polyester emulsion was replaced with vinyl acetate emulsion (P4! Fabric weight, 25 g/+rf) (Comparative Example 7) (5) Perforated PET film with a hole of 52 μm in thickness (
PET/PE) film (Comparative Example 8) Examples 7 and 8,
Comparative Examples 9 and 10 Hydrophobic polyester emulsion adhesive (manufactured by Toyobo ■) was applied to wop paper (basis weight 40 g/rd) at a solid content of 1
It was applied to one side at a coating weight of 0 g/nf and dried to leave the coated surface tack-free. Next, porous PE with a pore diameter of 100 μm
A laminated film was made by laminating a T film (a 12 μm deep film with holes in a grid pattern of 2×2 m/m) and the adhesive-coated surface of WOP paper at 100 to 120°C. Low-density polyethylene heated and melted at about 150° C. was transferred onto the WOPO laminated film using a gravure coating roll at a speed of about 100 m/min. In addition, by changing processing conditions such as coating speed and melting temperature, the amount of low-density polyethylene applied and the shape of the 4I! We created packaging materials with different fat widths and thicknesses. Comparative Example 11 Perforated (PET/PE) film with a pore diameter of 100 μm (2
x 2 m/m grid-shaped holes with a thickness of 52//
m film) and rayon paper (140 g/nf)
95~! A laminated film was prepared in exactly the same manner as in Example 1, except that the lamination was carried out at 05°C.
The WOP side of this laminated film and the perforated P with a pore diameter of 500 μm
E film (a 30 μm thick film with holes of 1.4 x 1.4 m/m in the form of a lattice) is 90 to 10
It was heat laminated at 0°C to form a three-layer #A film. The above packaging materials were measured for air permeability, workability, heat seal strength, bag formability, and durability, and the results are shown in the table below. In addition, the above 50 x 50 ■ packaging material is filled with oxygen absorbing capacity of 10 (ld) containing iron powder as main ingredient and oxygen absorber packaging filled with oxygen absorber & I. (KON/PH) was placed in a sealed bag and left at 25°C, and the time for the oxygen concentration to reach zero was measured.The number of samples was 10 for each example.The results are shown in the table below. [Effects of the Invention] (1) As shown in the examples, by laminating a film using a specific water emulsion adhesive, it is possible to obtain a package having poor performance as an oxygen absorber. In addition, the role of the water emulsion adhesive is not only to act as an adhesive layer for laminated films, but also to arbitrarily change the air permeability of the packaging material for oxygen absorbers.The air permeability of the packaging material The water emulsion adhesive particles adhering to the air-permeable film (B)
) and are maintained because gas can freely move in and out between the particles. The adhesive layer is preferably a monomolecular film, but in practice it is applied in multiple layers rather than in a single layer in order to maintain the strength of the laminate. In addition, printing is applied to give water and oil repellency and to maintain the beauty of packaging materials, but laminate films with large pores have poor water and oil repellency and the printed surface has holes. Disadvantages such as cutting can be solved by using a laminate film with small hole diameters. On the other hand, an oxygen absorber using a laminated film with a small opening diameter is commercially available, but in this case, a three-layer film similar to the one of the present invention is perforated with a hot needle, and then a sealant film with a low melting point is extruded and laminated. Afterwards, the holes are made with a hot needle. However, problems have been raised, such as the air permeability of the air permeable film being poor and the air permeability being unstable. In the present invention, these drawbacks are fully solved and the processability is also good.

(2) Conventional deoxidizing material packaging using paper-based packaging materials, microporous membranes, or non-woven fabrics is made by laminating a perforated, low-melting-point sealant film onto the G-based packaging materials, microporous membranes, or non-woven fabrics. However, these methods require difficult lamination processing conditions, are not only expensive, but also make it impossible to freely adjust the air permeability. There is no need to worry about this problem with packaging materials made of resin in the form of stripes instead of perforated film. In the present invention, since the resin is applied in the form of many stripes or fine lines to form the adhesive layer, the resin is formed only on a part of the microporous membrane, nonwoven fabric, or water- and oil-resistant treated paper.
The air permeability of the packaging material is maintained through the unapplied portions of the microporous membrane, non-woven fabric or water- and oil-resistant treated paper. The packaging material using the microporous membrane, non-woven fabric, or water- and oil-resistant treated paper of the present invention takes advantage of the characteristics of the micro-porous membrane, non-woven fabric, or water- and oil-resistant treated paper, and furthermore has a large number of streaks or fine mesh shapes. The resin shaped like this serves both as an adhesive layer and as a reinforcing material for packaging materials. As a result, it is possible to impart stable air permeability to microporous membranes, nonwoven fabrics, or water- and oil-resistant treated materials without significantly reducing their inherent air permeability. It is possible to obtain an oxygen absorber package that can exhibit stable oxygen absorbing performance, and at the same time has suitable bag formability and sufficient contact strength. Implementation of the oxygen absorber package of the present invention, which is filled with psyllium, packaged, and sealed! ! A cross-sectional view is shown. FIG. 4 shows a sectional view of another embodiment of the oxygen absorber package of the present invention.

Claims (3)

[Claims] (1) Oxygen scavenger made by laminating a perforated plastic film (A), a plastic film that is a nonwoven fabric or microporous membrane that has micropores and does not allow water to pass through under normal pressure, or water- and oil-resistant treated paper (B) (A) and (
B) is bonded with a water emulsion adhesive consisting of an emulsion of a crosslinkable acrylic resin, a hydrophobic polyester resin, an alkyd resin, a polyamide resin, a polyurethane resin, an epoxy resin, a melamine resin, or a phenolic resin, and is bonded to one side of (B). The above-mentioned nonwoven fabric, microporous membrane, or comb has a Gurley air permeability, in which a resin having a softening point equal to or lower than that of water- and oil-resistant treated paper is formed in the form of numerous stripes or fine meshes. 1-10,000 seconds/
A packaging material characterized in that the volume is 100 ml is used as all or part of the packaging material for the oxygen absorber, and the above (A
) on the outside, the oxygen absorber is packaged and sealed. (2) The amount of water emulsion adhesive applied is 1g in solid form.
The oxygen absorber package according to claim 1, wherein the oxygen absorbing agent has an oxygen absorbing capacity of 2 to 20 g/m^2. (3) The pore diameter of the bound plastic film (A) is 10~
The oxygen absorber package according to claim 1, which has a thickness of 500 μm.