JPH06211219A - Manufacture of oxygen absorptive container lid - Google Patents

Abstract

PURPOSE:To improve productivity of a container lid by providing a sol-like sealant component not containing oxygen absorbent on the peripheral edge and then that containing oxygen absorbent in the center area in an attaching shell body arranged so that the upper surface may be turned up. CONSTITUTION:A container lid shell body 1 wherein an adhesive film having an adhesive property to a sol-like sealant component for linear forming is formed on an apical plate portion inner surface side is held on a rotatable chack 2 so that the inner surface may be turned up. A sol-like sealant component not containing oxygen absorbent is provided by a nozzle 3 during the rotation of the shell body 1 to form an annular sol-like sealent component layer 4, while a sol-like sealant component containing oxygen absorbent is provided by a nozzle 5 during the rotation of the shell body 1 to form a circular sol-like sealant component layer 6. After that, respective sol-like sealant component layers 4, 6 in the lid are heated and gelled, so as to obtain a container lid with a linear.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an oxygen-absorbing container lid, and more particularly to a container lid having an excellent combination of excellent sealing performance and content storability with excellent productivity. It relates to a method of manufacturing.

[0002]

2. Description of the Related Art In the production of canned and bottled products, there is always a space called a headspace at the top of a can or a bottle, and oxygen remaining in the headspace oxidizes and deteriorates the contents, and The problem is that it causes the growth of mold, yeast, bacteria and the like.

In order to remove the oxygen in the headspace, steam or nitrogen gas is sprayed onto the can or bottle filled with the contents to replace the air in the headspace with these gases, and then to the can lid. It is generally practiced to double-tighten and cap the lid, but it is difficult to remove dissolved oxygen in the contents even with these methods, and can be used for filling fruits, fruit juices, vegetables, etc. and bottle filling. In, it is known that the deterioration of the contents is caused by dissolved oxygen.

The most commonly used method for preventing the influence of this dissolved oxygen is to configure the container surface with at least a part of metallic tin and to prevent the influence of residual oxygen by the reducing action of the metallic tin layer. It is what However, if the container surface is made of tin, tin ions will inevitably elute into the contents, and from a sanitary point of view, there is a great demand for alternative methods and means.

Further, conventionally, residual oxygen in the head space of a package such as a bag or bottle is absorbed, or dissolved oxygen in the content is absorbed to prevent oxidative deterioration of the content and growth of microorganisms. A functional lid is considered.

As such a container lid, an oxygen absorbent is embedded in a gasket made of cork or foamed resin,
In addition, the stored one is covered with a porous film.

Further, the Japanese Patent Publication No.
No. 31949 discloses a container lid including a container lid shell and a gasket provided in a sealed portion of the shell, wherein the sealing gasket is a vinyl chloride resin for paste, a plasticizer,
And a plastisol composition comprising an oxygen absorbent,
A container lid characterized in that the oxygen absorbent is kneaded with the resin component, or dispersed in the resin solution or molten resin, or dispersed when the plasticizer is blended with the resin, is described. ing.

[0008]

Of the above-mentioned conventional techniques,
A cork or the like having an oxygen absorbent embedded therein is not a dispersed phase kneaded with a cork or styrofoam, which is a continuous phase, but is simply retained and may be eluted into the contents of the container. In addition, those coated with a perforated resin film or the like have a problem in adjusting the diameter of the porous pores, causing the problem of elution of an excessively large oxygen absorbent or, conversely, penetration of the contents, and If it is small, there is a problem that the action of the oxygen absorbent is hindered.

In the latter plastisol composition mixed with an oxygen absorbent, the residual oxygen in the headspace, or the residual oxygen in the headspace, without elution of foreign matter into the contents or spoiling the flavor of the contents, By absorbing the dissolved oxygen of the content, there is an advantage that it is possible to prevent the oxidative deterioration of the content, the growth of microorganisms, etc. However, when an oxygen absorber is added to the plastisol composition, the plastisol agent composition There is an increase in viscosity, which tends to cause the following inconveniences.

That is, the application of the plastisol composition to the shell of the container lid is generally carried out by spin coating using a nozzle, but when the plastisol composition has a high viscosity, it is applied in the shell. Requires a high centrifugal force to spread, on the other hand, with high centrifugal force, the applied plastisol composition forms a high rise in the peripheral portion of the shell, and when a high rise occurs, because of the high viscosity, It was found that the tendency of it to be gentle was suppressed. This raised portion serves as a sealed portion with the container when the plastisol composition is gelled, so that the absorbent compounded at all times,
There is a problem that only a small amount is present in the center panel portion exposed inside the container, and a large amount is present in the peripheral portion that is important for sealing, which is likely to become a factor that hinders sealing.

Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the prior art in an oxygen-absorbing container lid using a sol-like sealant composition, and to provide an oxygen-absorbing agent incorporated in the sol-like sealant composition. Another object of the present invention is to provide a method for producing a container lid that is effectively used for absorbing oxygen in the container and that does not impair the sealing performance at all.

Another object of the present invention is to provide a method capable of producing the container lid with high productivity and good workability.

[0013]

According to the present invention, at least a container lid shell having an adhesive coating formed on the inner surface side is held on a rotatable chuck so that the inner surface faces upward. An operation of applying a sol-like sealant composition containing no oxygen absorbent to the inner peripheral edge of the container lid shell under rotation to form an annular sol-like sealant composition layer, and an inner center of the container lid shell. The operation of applying a sol-like sealant composition containing an oxygen absorbent to a part under rotation to form a circular sol-like sealant composition layer is performed in this order, the reverse order or simultaneously, and then the container lid. There is provided a method for producing an oxygen-absorbing container lid, characterized in that each sol-like sealant composition layer therein is gelled by heating.

[0014]

In FIG. 1 for explaining the principle of the present invention,
The container lid shell 1 is held on a rotatable chuck 2 such that the inner surface side of the shell 1 faces upward. Although not shown, an adhesive coating film having adhesiveness to a sol-like sealant composition for forming a liner, which will be described later, is formed on the inner surface side of the top plate portion of the container lid shell 1.

According to the present invention, the sol-like sealant composition containing no oxygen absorbent is applied to the peripheral edge of the inner surface of the container lid shell 1 through the nozzle 3 while the shell 1 is rotating, and the cyclic sol is formed. The sealant composition layer 4 is formed, and the sol-like sealant composition containing an oxygen absorbent is applied to the shell 1 through the nozzle 5 in the central portion on the inner surface side of the shell 1 while the shell 1 is rotating to form a circular sealant composition. The sol-like sealant composition layer 6 is formed.

After forming the annular oxygen absorber-free sol-like sealant composition layer 4 and the circular oxygen absorber-containing sol-like sealant composition layer 6, each sol-like sealant composition in the lid is formed. The layers 4 and 6 are gelled by heating and are bonded and integrated to the shell body 1 via an adhesive coating film to obtain a container lid with a liner.

According to the present invention, a sol-like sealant composition which does not contain an oxygen absorbent and therefore has a relatively low viscosity is applied to the peripheral portion of the lid shell, so that the container is sealed. While it is possible to apply the important sealing liner (gasket) uniformly and evenly and reliably,
By applying a sol-like sealant composition containing an oxygen absorbent and having a relatively high viscosity to the center of the lid shell, the sol-like sealant composition is excessively diffused to the peripheral portion. And a liner layer (oxygen-absorbing liner layer) of a sol-like sealant composition containing an oxygen absorbent is selectively formed in the central portion of the lid shell that is most effective in absorbing residual oxygen in the container. It becomes possible. When a sol-like sealant composition mixed with an oxygen absorber is gelled by heating, the residual oxygen in the container can be easily absorbed through the elastomer or rubber, and at the same time, the oxygen absorber and oxygen absorber can be absorbed. Since the elution of the reaction product of the agent and oxygen into the content is suppressed, the flavor retention of the content can be improved.

Thus, according to the present invention, not only the most desirable liner structure can be formed in the lid shell of the container in terms of the sealing property with the container, the absorption of residual oxygen in the container, the retention of flavor and the like. The advantage is that these composite liner layers can be formed with high productivity in a small number of steps and with good workability.

[0019]

Preferred Embodiment of the Invention

[Container lid shell] The container lid shell should have rigidity such that the liner keeps the seal irrespective of the pressure difference between the inside and the outside of the container, and is made of various metals, plastics, or composites thereof. It is good to be there. As the metal, a light metal plate such as aluminum or aluminum alloy,
Surface-treated steel plates such as tinplate and thein-free steel are used. Examples of plastics include high-density polyethylene, polypropylene, thermoplastic polyester, polyamide, and styrene resins. The shape of the shell may be a crown, a screw cap, a pill fur proof type cap, a lug cap, a white cap, a tab slit opening type cap, or the like.

As shown in FIG. 1, the container lid shell 1 used in the present invention comprises a top surface 7 and a skirt portion 8 connected to the periphery of the top surface. Although not shown, the skirt portion is provided with a locking mechanism for the container, such as a crimp in the case of a crown and a screw in the case of a cap. In the metal lid, the shell is formed by press molding or drawing of a coated metal plate, while in the plastic lid, it is formed by injection molding or press molding of plastic.

On the inner surface side of the top surface, a sol-like sealant composition,
For example, a sol of vinyl chloride resin or other elastomer or rubber described later is preliminarily coated with a paint exhibiting adhesiveness during gelation. In the case of a metal lid, this paint also serves as protection from metal corrosion.

As such an adhesive paint, an epoxy resin adhesive paint, a urethane resin adhesive paint, a vinyl chloride resin adhesive paint, an acrylic adhesive paint, an acid-modified olefin resin-containing adhesive paint, etc. are used. It is appropriately selected and used in combination with the constituent polymer of the agent composition. A suitable thickness of the adhesive coating is 1.0 to 6.0 μm.

[Sol-like Sealant Composition] The sol-like sealant composition used in the present invention is a viscous sol-like liquid,
It is a gel that is formed by heating to form a sealant layer.
In this sol-like sealant composition, a plasticizer, a solvent, water or the like serves as a dispersion medium, and the polymer forming the sealant is dispersed in the dispersion medium in a form that is very familiar to the dispersion medium. The coalescence gels into a continuous layer.

The sealant-forming polymer is a resin (thermoplastic elastomer) or rubber known per se having appropriate elasticity and cushioning property, particularly vinyl chloride resin, ethylene-vinyl acetate copolymer, ethylene-propylene. Copolymer, thermoplastic styrene-butadiene-styrene block copolymer, thermoplastic styrene-isoprene-styrene copolymer, ethylene-propylene rubber, ethylene-propylene-non-conjugated diene rubber, styrene-butadiene-
Examples thereof include rubber, nitrile-butadiene rubber, butyl rubber, natural rubber, polybutadiene, chloroprene rubber, polyurethane, acrylic elastomer, acrylic rubber, and silicone rubber.

The preferred sol sealant compositions are those commonly referred to as plastisols. In this plastisol, the sealant polymer particles are dispersed in the plasticizer,
The heating causes the plasticizer to be absorbed in the polymer and at the same time forms a liner as a whole. As the polymer forming this plastisol, vinyl chloride resin is preferably used, but other elastomers can of course be used. The particle size of the polymer particles may be within the range of emulsion polymerized particles, within the range of suspension polymerized particles, or a combination thereof. Examples of the plasticizer include phthalic acid esters such as dioctyl phthalate (DOP) and butyllauryl; adipic acid; aliphatic dibasic acid esters such as dibutyl ester of azelaic acid or sebacic acid and dioctyl ester; and tricresyl phosphate. Phosphoric acid esters; hydroxy polycarboxylic acid esters; fatty acid esters; polyhydric alcohol esters; or epoxidized oil, etc. are used. The weight ratio of sealant polymer particles to plasticizer is generally 75:25 to 2
It is preferably in the range of 5:75, especially 40:60 to 60:40.

Other suitable sol sealant compositions are:
What is called latex or suspension, in this latex or suspension, the sealant polymer particles are dispersed in water or an organic solvent in an emulsified state or a suspended state, and water or the organic solvent is evaporated by heating, The polymer particles coalesce to form a liner. In order to disperse and stabilize the polymer particles,
Surfactants, emulsifiers such as soap, and dispersants such as water-soluble polymers are used. As the polymer forming this latex or suspension, various thermoplastic elastomers and rubbers are used. The particle size of the polymer particles may be within the range of emulsion polymerized particles, within the range of suspension polymerized particles, or a combination thereof. The solid content concentration in the latex or suspension is generally 10 to 70% by weight, preferably 20 to 60% by weight. Styrene-butadiene rubber (S
Aqueous latex (BR), solvent type SBR, and the like are suitable as a container lid liner because they have excellent sealing properties and processability.

Into these resins or elastomers, a resin compounding agent known per se, for example, a filler, a colorant, a heat stabilizer, a foaming agent, a cross-linking agent and the like can be compounded according to a formulation known per se. .

[Oxygen-absorbing sol-like sealant composition] In the present invention, an oxygen absorber is added to the sol-like sealant composition,
This composition is applied to the center of the container lid shell. The composition of the sol-like sealant composition is preferably the same as that of the sol-like sealant composition applied around the container lid shell. This is because common gelling conditions can be used when the sol-sealant compositions used are common.

The oxygen absorbent may be an inorganic or organic oxygen absorbent. Further, together with the oxygen absorbent, a promoter that accelerates the deoxidizing action may be added. The promoter may directly contribute to deoxidation, or may have a function of improving the oxygen permeability coefficient and the water adsorption amount. A resin having a water adsorption amount of 1% or more in pure water at 20 ° C. may be used together with the oxygen absorbent. Examples of oxygen absorbers are as follows.

(A) Inorganic Oxygen Absorber Specific examples of the inorganic oxygen absorber include iron group metals such as iron powder or iron powder coated with a metal halide, iron carbide, silicon iron, and other iron group metals. Metal alloys; compounds of divalent iron group metals such as ferrous sulfate, ferrous chloride, ferrous oxide and the like can be mentioned, and it is desirable to use them together with a promoter described later. The oxygen absorber may be water-soluble or insoluble, but it is desirable to use a water-insoluble oxygen absorber in order not to impair the flavor retention of the contents. A granular oxygen absorbent may be kneaded with the resin to prevent elution.

(B) Organic Oxygen Absorber Specific examples of the organic oxygen absorber include polyphenols such as catechol and pyrogallol, or phenolic resins,
Ascorbic acid, erythorbic acid or their salts,
Tocophenol and the like, sugars such as glucose, fructose, galactose, maltose and cellobiose, and their enzymatic agents, hydroquinone, gallic acid and the like can be used. From the viewpoint of retaining the flavor (flavor) of the content and preventing migration or elution into the content, the organic oxygen absorbent is preferably insoluble in water and has a large molecular weight.

As the phenolic resin, hydroquinone / aldehyde resin is preferable. This oxygen absorbent comprises a resin having an oxygen-absorbing group on the molecular chain, particularly a hydroquinone-aldehyde resin having a plurality of phenolic hydroxyl groups per ring in the phenol skeleton.

Generally, the oxygen absorbent is 1 to 100 parts by weight per 100 parts by weight of the liner resin or rubber,
In particular, the amount is 5 to 40 parts by weight. That is, when the amount of the oxygen absorbent is less than the above range, the residual oxygen absorbing effect is unsatisfactory, while when it is more than the above range, the oxygen absorbent-containing sol-like sealant composition is applied to the container lid shell. It becomes difficult to do so, or the oxygen absorbent mixes into the contents in the container due to dusting.

In the present invention, the accelerator can be added together with the oxygen absorbent. As the accelerator, a salt or an electron-donating substance that directly acts on the oxygen absorber and a hydrophilic substance that causes the oxygen absorber to contain water can be used. Such promoters, in addition to the structure of the liner described above, also achieve rapid removal of oxygen.

The electron donating substance is preferably added in an amount of 0.1 to 50 parts by weight, particularly 1 to 20 parts by weight, per 100 parts by weight of the oxygen absorbent. As the salts and electron-donating substances, common water-soluble salts such as sodium chloride, potassium chloride, calcium chloride, sodium sulfate and sodium nitrate can be used. Further, the organic oxygen absorbent or the inorganic oxygen absorbent is usually remarkably promoted on the alkaline side, and it is particularly desirable to use a solid base as the promoter. The solid base is preferably a water-insoluble one in terms of flavor retention and hygienic properties of the content, such as zinc oxide, magnesium carbonate, silicate, anion exchange resin, zeolite, melamine resin, urea resin, Ammonia resol resin etc. are mentioned.

The hydrophilic substance can be provided as a dispersed phase in the resin to accelerate the oxygen absorption reaction of the oxygen absorbent. Specific examples of the hydrophilicity include the following, and these have a weight increase rate of 1% or more, especially 2.0% when immersed in pure water at 20 ° C. for 24 hours based on the JIS standard test method. % Or more is desirable.

The hydrophilic substance is preferably a polymer for suppressing dissolution, and for the purpose of promoting the oxygen absorption reaction, polyvinyl alcohol, methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, etc. Cellulose derivatives, partially saponified polyvinyl acetate, polyvinyl methyl ether, polyacrylic acid, polymethacrylic acid, vinyl methyl ether / maleic anhydride copolymer, polyvinyl pyrrolidone, acrylamide / acrylic acid salt copolymer, acrylamide / methylene bis Partially saponified acrylamide copolymer, saponified vinyl acetate / methyl acrylate copolymer, polyoxyethylene compound, polystyrene sulfonic acid, poly-2-
Preferred are acrylamido-2-methylpropanesulfonic acid and hydrophilic polymer compounds such as gelatin, modified casein, modified starch, sodium alginate and tragacanth gum. These polymers are resins or rubbers for liners 100
It is desirable to add 1 part by weight or more, especially 2 to 10 parts by weight per part by weight.

[Application and Gelation] In the present invention, the container lid shell is held on a rotatable chuck so that the inner surface faces upward, and the container lid shell is rotated while the sol containing no oxygen absorbent is included. And the oxygen absorbent-containing sol-like sealant composition. At this time, by utilizing the characteristic that the oxygen absorbent-containing sol-like sealant composition has a higher viscosity than the oxygen absorbent-free sol-like sealant composition, the inner peripheral edge of the container lid shell is A sol-like sealant composition containing no oxygen absorber is formed as a ring-shaped sealant composition layer, and a sol-like sealant composition containing an oxygen absorber is formed into a circular shape in the inner center of the container lid shell. It becomes possible to form it as a sealant composition layer.

The sol-like composition is prepared by using a nozzle located on a rotary chuck and opening and closing a valve. A nozzle for a usual sealant composition is located toward the peripheral portion of a container lid shell. On the other hand, the nozzle for the oxygen absorbent-containing composition is preferably positioned toward the center of the container lid shell to inject the sol composition into the container lid shell. The injection operations are preferably performed at the same time, but can of course be performed separately.

Generally, the viscosity of the oxygen absorbent-containing sol composition is preferably in the range of 1500 to 5000 centipoise (40 ° C.). Sol-like sealant compositions that do not contain oxygen absorbers have lower viscosities. The rotation speed of the chuck is generally selected from the rotation speed of 100 to 1500 rpm, and the rotation speed is selected so that appropriate coating can be performed according to the viscosity of the sol-like sealant composition.

The coating amount of the sol sealant composition (A) containing no oxygen absorbent and the coating amount of the sol sealant composition (B) containing oxygen absorber are the size of the container lid shell and required. It cannot be specified unconditionally because it also depends on the amount of oxygen absorbed, but in the weight ratio based on the solid content, A: B = 90: 10 to 3
It is preferred to use it in a weight ratio of 0:70, especially 80:20 to 40:60. The annular layer of the sol-like sealant composition containing no oxygen absorber and the circular layer of the sol-like sealant composition containing oxygen absorber may be separated from each other, adjacent to each other, or overlap with each other. You may have.

Each sol-like sealant composition layer applied inside the container lid shell is gelated by heating. In plastisol, the plasticizer, which is a dispersion medium, is absorbed into the polymer by heating, and the whole is integrated to form a liner excellent in cushioning property and flexibility. Further, in the latex or suspension, water or an organic solvent as a dispersion medium evaporates by heating, and the polymer particles coalesce to form a liner. The heating temperature varies depending on the type of the sol sealant composition, but in the case of plastisol, the temperature of 180 to 210 ° C is suitable, while in the case of latex or suspension, the temperature of 90 to 180 ° C is suitable. The heating atmosphere may be atmospheric air, but it is preferable to perform heating under an inert atmosphere such as nitrogen or under reduced pressure in order to prevent consumption of the oxygen absorbent.

[0043]

The effects of the present invention will be described in the following examples. Example 1 A plastisol composition (A) shown in Table 1 was added to a ring-pull cap having a diameter of 60 mm in an amount of 700 mg / cap at the inner peripheral edge as a sealing gasket and 30 wt% of sodium ascorbate as an oxygen absorbing compound. The oxygen-absorbing sol composition (B) was applied from a separate discharge nozzle while rotating the cap shell so as to form a circular shape having a thickness of 0.4 mm and a diameter of 30 mm in the center of the top surface of the cap. The order of application is (B) at the center and then the gasket (A). The viscosities of the respective sol compositions were measured using a B-type viscometer, and were (A) 1250 cps, (B) 2000 c
ps, the cap rotation speed during application is (A) 200r
pm, (B) 1000 rpm. The cap was used for tangerine syrup pickling in a glass bottle, and the storage state of the contents was examined. The sterilization condition after filling the contents is 85 ° C for 15 minutes,
It was stored at 22 ° C. under a fluorescent lamp. As a comparative product, one in which the sol composition (A) was applied to the gasket part and the central part (comparative product 1) and one in which only the sol composition (B) was applied to both parts (comparative example 2) were used. I was there. The sealing performance and the content storage performance were examined, and the results are shown in Table 2.

Sealing performance measuring method a) Thermal shock test: Leaving at 50 ° C. for 1 day, quenching to 0 ° C., and checking for leakage. b) Inverted drop test After leaving it at 50 ° C for 1 day, return it to room temperature and drop it on an iron surface with an inclination angle of 20 ° from a predetermined height to check for leakage.

Method of measuring storage performance After removing solids from the contents, syrup of 230 nm
Absorbance of is measured by a spectrophotometer.

[0046]

[Table 1]

[0047]

[Table 2] * Leakage rate ** Height 30 cm *** Immediately after sterilization As is clear from these results, those without the oxygen-absorbing sol composition have good sealing performance but poor storability, while high-viscosity oxygen absorption. It is understood that the composition in which the volatile sol composition is applied to the sealing portion and the top surface has good storage performance but has a problem in sealing performance.

Example 2 A lug cap having a diameter of 60 mm was prepared, and a solvent type sealing comparand (solid content 30% by weight) consisting of styrene-butadiene rubber (SBR), a tackifier and an inorganic filler was placed in the center of the gasket portion. On the top surface, as an oxygen absorber,
A sol containing 20% by weight of an iron-based composition was applied and baked according to Example 1. When applied to a glass bottle filled with mandarin orange syrup, both sealing performance and storage performance were good.

Example 3 Example 1 was applied to the gasket portion and the central top surface portion of a multi-layer plastic screw cap in which the inner and outer surfaces were polypropylene and the intermediate layer was an ethylene-vinyl alcohol copolymer.
Two kinds of sol compositions were applied by the method described in 1. above and solidified by microwave heating. In order to improve the close contact between the lid body and the sol composition, a hook-shaped projection and a notch for pressing the gasket are provided on the sol-coated surface of the cap. As a comparative sample, a sol composition containing no oxygen absorbent was applied to the gasket portion and the top surface portion. When a storage test was conducted under the contents and conditions of Example 1, good results were obtained.

[0050]

According to the present invention, a sol-like sealant composition which does not contain an oxygen absorbent and therefore has a relatively low viscosity is applied to the peripheral portion of the lid shell to seal the container. It is possible to apply the important sealing liner (gasket) uniformly, evenly and surely, while it contains the oxygen absorbent, and therefore the relatively high viscosity sol. By applying the sealant composition to the central portion of the lid shell, the sol-like sealant composition is prevented from excessively diffusing to the peripheral portion, and the most effective lid for absorbing residual oxygen in the container. It becomes possible to selectively form a liner layer (oxygen-absorbing liner layer) of the oxygen absorbent-containing sol-like sealant composition in the central portion of the shell body, whereby the sealability with the container and the residual oxygen in the container The most desirable liner structure in terms of absorption and flavor retention Container Futakara not only capable of forming the body, with only even with good workability these composite liner layer with a small number of steps, an advantage that can form good productivity is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the principle of a container lid manufacturing method of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Container lid shell 2 Rotatable chuck 3 Nozzle 4 Circular layer of sol-like sealant composition containing no oxygen absorber 5 Nozzle 6 Circular layer of sol-like sealant composition containing oxygen absorber

Claims (1)

[Claims] 1. A container lid shell body having an adhesive coating film formed on at least the inner surface side is held on a rotatable chuck so that the inner surface faces upward, and oxygen is provided on the inner peripheral edge of the container lid shell body. An operation of applying a sol-like sealant composition containing no absorber under rotation to form an annular sol-like sealant composition layer, and a sol-like sealant containing an oxygen absorber in the inner center of the container lid shell. The operation of applying the composition under rotation to form a circular sol-like composition layer is performed in this order, the reverse order or simultaneously, and then each sol-like sealant composition layer in the container lid is heated to form a gel. A method for producing an oxygen-absorbing container lid, characterized by: