JP2000142691A - Lid with easy-opening port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid having an easy opening port in which a port forming section is pushed into a container to form the opening port by pulling up a pull-top member and medicine is not leaked out during its retort processing. SOLUTION: There is provided a lid 1 having an easy-opening port in which an opening formed section 6 formed at a score line 5 by pulling up a knob member 7 is pushed into a container to form an opening part. Medicine 14 such as perfumes or the like is stored in an indentation 13 formed at the lower surface of a lid main body 2. The indentation 13 is covered by a covering member 15 composed of a photocurable compound so as to constitute the lid 1 having an easy-opening port where the medicine is not leaked out during its retort processing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid with a simple opening port used for an end plate of a container used for canned beverages and the like.

[0002]

2. Description of the Related Art By pulling up a knob attached to the upper surface of a lid fixed to a container, a score line previously formed on a part of a central flat plate portion of the lid is broken, and an opening defined by the score line is formed. A lid with a simple opening port called a lid with a stay-on tab (SOT lid) that opens while holding the knob member and the opening forming part on the lid main body by pushing the part into the container is conventionally known. In addition, a fragrance is placed in a concave portion formed on the lower surface of the lid main body constituting the lid with the simple opening opening, the concave portion is covered with a fragrance-impermeable covering member, and a part of the covering member is peeled off simultaneously with the opening operation. For example, Japanese Patent Application Laid-Open No. Hei 5-338650 discloses a simple opening lid having a fragrance function, in which the fragrance of the fragrance in the concave portion is emitted from the opening together with the beverage without notice to the user.
No. 6,086,045.

[0003] Japanese Patent Application Laid-Open No. 5-338650 discloses that
As a fragrance-impermeable covering member for containing a fragrance used for a simple opening lid having a fragrance function, polyethylene, polypropylene, polyester, polyamide,
Various thermoplastic resins such as ethylene vinyl acetate copolymers and polycarbonates, or hot melt resins formed by mixing tackifiers such as rosin-based resins, terpene-based resins, and petroleum resins based on such thermoplastic resins, etc. States that is suitable.

[0004]

Generally, in the field of foods and beverages, high-temperature sterilization (retort treatment) is often performed to sterilize foods and drinks in a container. The present invention is also applicable to the contents of a can having a lid with a simple opening having the following.

[0005] The covering member made of the thermoplastic resin of the lid with a simple opening opening having the above-mentioned perfumery function softens the thermoplastic resin at the time of this retort treatment, so that the fragrance contained in the concave portion leaks out, and the aromatic material becomes aromatic. The flavor and the flavor of the food and drink may be adversely affected by the deterioration and the flavor of the food and drink in the container, and the softening of the thermoplastic resin of the covering member due to the heat may occur in a hot state in a vending machine or the like for a long time. This can also occur for cans that are held.

The present invention has been made in view of the above circumstances, and has as its object to provide a lid with a simple opening port having a perfume-preventing function and the like in which a fragrance or the like stored in a concave portion does not leak during retort treatment or the like.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a lid with a simple opening port according to the present invention is provided in which a medicine is contained in a concave portion formed on a lower surface of a lid main body provided in a container, and the concave portion is light-cured. At the same time that the opening forming portion is broken by an opening operation of pulling up a knob member formed on the upper surface of the lid body and a part of the opening forming portion is pushed into the container, A part of the covering member that covers the concave portion of the lid body is peeled off so that the medicine in the concave portion can be scattered to the outside.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a lid 1 having a simple opening opening having a fragrance function according to the present invention comprises:
A flange portion 3 for winding around a container body is formed on an outer peripheral edge of a lid body 2 made of an aluminum alloy or the like, and a flat plate portion 4 is formed inside the lid member 1 surrounded by the flange portion 3. It is.

A score line 5 is formed on the flat plate portion 4,
The section surrounded by the score line 5 except for a part is the opening forming portion 6 that is opened after the score line 5 is broken.

At a substantially central position of the lid main body 2 located in the vicinity of the opening forming portion 6, a rivet 8 for attaching the knob member 7 by projecting the lid main body 2 from below to above is provided.

The knob member 7 includes a knob main body 9 and a mounting portion 10 formed separately from the lid main body 2 by using an aluminum alloy or the like. A locking hole 11 for locking is formed, and the mounting portion 10 is formed integrally with the knob main body 9 via a separating portion 12 provided inside the knob main body 9, and the rivet 8 is passed through the center thereof. Holes are provided. The front end 9a of the knob main body 9 is disposed so as to overlap a part of the upper region of the opening forming portion 5, and is fixed to the lid main body 2 by the rivet 8 at the mounting portion 10.

According to the present invention, as shown in FIGS. 2 and 3, a concave portion 13 on the back surface of the lid main body 2 formed when the rivet 8 is formed is filled with a chemical 14 such as a fragrance, and the photocurable material is heated and melted. After applying or dripping the composition, the composition is polymerized by irradiation with ultraviolet light or visible light to form a coating with the coating member 15. The lid 1 with a simple opening port in which the medicine 14 is sealed in the recess 13 of the lid body 2 by the covering member 15 is attached to a container (not shown).

In the container provided with the lid 1 having such a simple opening port, the score line 5 is broken by putting a finger on the locking hole 11 of the knob 7 provided on the lid body 2 and pulling it upward. A part of the opening forming section 6 defined by the score line 5 is pushed into the container, and the knob member 7 and the opening forming section 6 are pressed.
When the knob 7 is further pulled up, a part of the opening forming part 6 is pushed into the container, and at this time, a part of the covering member 15 provided on the lower surface of the lid body 2 is removed. The medicine 14 that has been peeled off and sealed in the recess 13 is scattered into the container and scattered outside through the opening of the lid body 2.

When the photocurable composition is applied or dropped on the lid 1 with the simple opening, and the medicine is pressed, the medicine 14 comes out of the recess 13 and the medicine 14 is covered with the photocurable composition. As shown in FIG. 4, the concave portion 13 into which the liquid agent 14 has been injected is covered with an aluminum foil 16 in advance to eliminate the problem of poor adhesion due to intrusion into the interface between the lid 15 and the lid body 1. The coating composition 15 can be formed by applying or dripping and pressing the photocurable composition.

When the retort treatment is carried out at a higher temperature, as shown in FIG. 5, in order to prevent the leakage of the chemical, it is covered with a coating member 15 made of a photocurable composition.
Further, it is desirable to cover with a covering member 17 of a resin composition. As the resin composition used in this case, the same resin component as a normal-temperature solid and hot-melt resin component described later can be used.

Various types of photocurable compositions can be used as the photocurable composition constituting the covering member. Preferred photocurable compositions include the following A type and B type compositions.

A (meth) acrylate having at least one (meth) acryloyl group in one molecule of the A-type photocurable composition (hereinafter, simply referred to as (meth) acrylate) and the (meth) acrylate A) a photocurable composition comprising a photopolymerization initiator in an amount of 0.5 to 10% by weight based on the acrylate ester;

B type photo-curable composition 5% by weight or more of the (meth) acrylic acid ester, and 95% by weight or less of a resin component (hereinafter, referred to as “resin component”) which is a solid at room temperature and is heat-fusible. A photocurable composition, which is blended in a ratio and contains a photopolymerization initiator in an amount of 0.5 to 10% by weight based on the total amount of the (meth) acrylate and the resin component.

The A-type photocurable composition comprises a (meth) acrylate alone and a photopolymerization initiator, and the B-type photocurable composition comprises a (meth) acrylate and a resin. A combination with a component is essential, and a photopolymerization initiator is added to this.

In this type B photocurable composition,
A more preferred combination of the (meth) acrylic acid ester and the resin component is (meth) acrylic acid ester of 20%.
When the content of the (meth) acrylate is less than 5% by weight, in other words, when the content of the resin component exceeds 95% by weight, the heat resistance is improved by light irradiation. The effect is low and does not meet the object of the present invention.

The above (meth) constituting the photocurable composition
Various acrylates can be used. For example, one or two or more (meth) acryls selected from the group consisting of the following (meth) acrylates (1) to (11) Acid esters can be mentioned. (1) A (meth) acrylate ester represented by the following general formula:

[0022]

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In the above formula, R ₁ is hydrogen or —CH ₃ , R ₂ is a linear or branched alkyl group having 2 to 4 carbon atoms, and one or two hydrogen atoms at any positions are represented by the following formulas. And a substituted alkyl group in which at least one is substituted with -OH and / or halogen.

Specific examples of the (meth) acrylic acid ester of Chemical Formula 1 include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 1,2-dihydroxyethyl ( (Meth) acrylate, 3-chloro-2-hydroxypropyl (meth) acrylate, and the like.

(2) A (meth) acrylate ester represented by the following general formula (2).

[0026]

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In the above formula, R ₃ is hydrogen or —CH ₃ , R ₄ is hydrogen, —CH ₃ , —C ₂ H ₅ , —C
H ₂ OH or a group represented by the following formula (3). R ₅ is hydrogen, —CH ₃ , —C ₂ H ₅ , —OH, or a group represented by the following formula (4), m is an integer of 1 to 8, n is an integer of 1 to 20, p represents 0 or 1.

[0028]

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[0029]

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The (meth) acrylic acid ester of the above [Chemical Formula 2] is specifically exemplified by diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, 1,2 -Propylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate,
Examples thereof include diglycerol di (meth) acrylate, glycerin tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, and di-glycerol tetra (meth) acrylate.

(3) A (meth) acrylate ester represented by the following general formula:

[0032]

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In the above formula, R ₇ is hydrogen or —CH ₃ , R ₈ is hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms, and R ₉ is a C _{2 to} C ₄ carbon atom. It represents a straight or branched alkylene group, and m represents an integer of 1 to 10.

Specific examples of the (meth) acrylic acid ester of the above [Chemical Formula 5] include 2,2-bis (4-methacryloxydiethoxyphenyl) propane and 2,2-bis (4-allyloxydiethoxy). Phenyl) propane, 2,2-bis (4-methacryloxytriethoxyphenyl) propane, 2,2-bis (4-acryloxypentaethoxyphenyl) propane, 2-2bis (4-methacryloxyhexaethoxyphenyl) propane , 2,2-bis (4-
Acryloxyheptaethoxyphenyl) propane, 2,
2-bis (4-methacryloxyoctaethoxyphenyl) propane, 2,2-bis (4-acryloxydipropoxyphenyl) propane, 2,2-bis (4-methacryloxytripropoxyphenyl) propane, 2,2-
Bis (4-acryloxydipoxyphenyl) propane, 2,2-bis (4-methacryloxyoctabutdoxyphenyl) propane, 2- (4-methacryloxydiethoxyphenyl) -2- (4-methacryloxytri Ethoxyphenyl) propane, 2- (4-acryloxydipropoxyphenyl) -2- (4-acryloxytriethoxyphenyl) propane, and the like.

(4) A (meth) acrylate ester represented by the following general formula:

[0036]

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In the above formula, R ₁₀ is hydrogen or -C
H ₃ and R ₁₁ represent hydrogen or a linear or branched alkyl group having 1 to 4 carbon atoms, and n represents 0 or an integer of 1 to 10.

The (meth) acrylic acid ester of the above [Chemical Formula 6] is, specifically, dicyclopentenyl (meth) acrylate, dicyclopentenyloxymethyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, And dicyclopentenyloxypropyl (meth) acrylate.

(5) A (meth) acrylate ester represented by the following general formula (7):

[0040]

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In the above formula, R ₁₂ is hydrogen or -C
H ₃ and R ₁₃ are hydrogen or a linear or branched alkyl group having 1 to 18 carbon atoms, or a cyclic alkyl group having 5 to 20 carbon atoms,
A phenyl group, a tetrahydrofurfuryl group, or a linear or branched alkyl group having 5 to 20 carbon atoms having these groups is shown.

Specific examples of the (meth) acrylic acid ester represented by the general formula include methacrylic acid,
Examples include acrylic acid, methyl (meth) acrylate, cyclohexyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, 2-ethylhexyl (meth) acrylate, phenyl (meth) acrylate, and benzyl (meth) acrylate.

(6) A (meth) acrylate ester represented by the following general formula:

[0044]

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In the above formula, in the formula, R ₁₄ is hydrogen or —CH 3, and R ₁₅ is a substituted alkylene in which hydrogen at any position of a linear or branched alkyl group having 3 or 4 carbon atoms is substituted with —OH. The group, R _16, represents a linear or branched alkyl group having 1 to 18 carbon atoms.

Specific examples of the (meth) acrylic acid ester represented by the general formula include 2-hydroxy-3-hexypropyl (meth) acrylate and cyclohexanoxy-β-hydroxypropyl (meth). ) Acrylate, tetrahydrofluroxy-β-hydroxypropyl (meth) acrylate, nonyloxy-β-hydroxypropyl (meth) acrylate, and the like.

(7) A (meth) acrylic acid ester represented by the following general formula:

[0048]

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In the above formula, R ₁₇ is hydrogen or —CH ₃ , and R ₁₈ is a linear or branched alkyl group having 1 to 20 carbon atoms, an alkenyl group, an aryl group, an aralkyl group,
Alternatively, it represents a linear or branched alkoxyalkyl group.

Specific examples of the (meth) acrylic acid ester represented by the general formula include methoxycarbonylmethyl (meth) acrylate, ethoxycarbonylmethyl (meth) acrylate, and heptoxycarbonylmethyl (meth) acrylate. And isopropoxycarbonylmethyl (meth) acrylate.

(8) A (meth) acrylic acid ester represented by the following general formula:

[0052]

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In the formula, R ₁₉ is hydrogen or —CH ₃ , R ₂₀ is a linear or branched alkylene group having 2 to 4 carbon atoms, m is an integer of 1 to 10, and n is 1 Or 2.

(9) A (meth) acrylic acid ester represented by the following general formula:

[0055]

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In the above formula, R ₂₁ is hydrogen or —CH ₃ , m is an integer of 1 to 10, and n is 1 or 2.

Specific examples of the (meth) acrylic acid esters represented by the above [Chemical Formula 10] and [Chemical Formula 11] include:
Acid phosphoxyethyl (meth) acrylate, 3-
Chloro-2-acid phosphooxypropyl (meth) acrylate, acid phosphooxypropyl (meth) acrylate and the like.

(10) A (meth) acrylic acid ester comprising a reaction product of a (meth) acrylate (A) having a hydroxyl group and an organic polyisocyanate (B).

(11) (meth) acrylic acid comprising a reaction product of a (meth) acrylate (A) having a hydroxyl group, an organic polyisocyanate (B), and a trivalent or higher polyol and / or diol (C) ester.

The above (meth) acrylate (10)
Specific examples of the (meth) acrylate (A) having a hydroxyl group in (11) and (11) include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, and hydroxyhexyl (meth). Examples include acrylate, hydroxyoctyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, and 2-hydroxy-3-chloropropyl (meth) acrylate.

Specific examples of the organic polyisocyanate (B) include toluene diisocyanate, 4,4'-diphenyl diisocyanate, 4,4'-diphenylmethane diisocyanate, dianidin diisocyanate, and the like.
1,5-naphthalene diisocyanate, 4,4'-diphenyl ether diisocyanate, p-phenylene diasocyanate, trimethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, ethylene diisocyanate, cyclohexylene diisocyanate, nonamethylene diisocyanate, octadecamethylene diisocyanate , 2-chloropropane diisocyanate, 2,2'-diethyl ether diisocyanate, tetrachlorophenylene diisocyanate, xylene diisocyanate, and 1,4,3-heptene diisocyanate; Isocyanates, as already known, primary amines,
Secondary amines or polyhydric alcohols such as glycerol, polyoxyethylene triol, polyoxypropylene triol, polyoxyethylene tetraol,
Polyoxypropylene tetraol, polypropylene glycol, polyethyne glycol, polycaprolactone polyol, polytetramethylene ether glycol,
A high molecular weight organic polyisocyanate obtained by reacting bisphenol A with a polyhydric alcohol such as an ether type glycol obtained by adding ethylene oxide and / or propylene oxide is exemplified.

Specific examples of the polyol (C) include diols 1,6-hexanediol, 1,4-cyclohexanedimethanol, 3-methyl-1,5-pentanediol, 1,5-pentanediol, and polyoxyethylene. Trimethylol ethane, pentaerythritol, trimethylol propane, trimethylolpropane, polyoxy, diol, polyoxypropylene diol, polyoxybutylene diol, polycaprolactone diol, trimethyl hexane diol, 1,4-butane diol, polycarbonate diol, etc. Ethylene triol, polyoxypropylene triol, trishydroxyethyl isocyanurate, polyoxyethylene tetraol, polyoxypropylene tetraol, glycerin, polyphosphoric acid, etc. Polybutadiene alcohol olefinic alcohol, hydrogenated polybutadiene alcohol,
Examples of the alcohol include polybutene alcohol, hydrogenated polyisoprene alcohol, and polyisobutylene alcohol.

Examples of the resin component to be combined with the (meth) acrylic ester described above include the following. That is, the formula: AB, ABA or B-
AB (where A is a styrene block, and B is a polybutadiene block, a polyisoprene block or a hydrogenated block thereof), a synthetic thermoplastic rubber (polyisoprene, styrene rubber, butadiene) Rubber, butyl rubber, etc.), polyolefin or polyolefin-based copolymer (polyethylene, polypropylene, ethylene-vinyl acetate copolymer, etc.), a so-called polyester resin having an ester bond in the molecule, and a so-called polyamide resin having an amide bond in the molecule As a main component, and if necessary, a tackifier (rosin resin, hydrogenated petroleum resin, hydrogenated terpene resin, phenol resin, cumarone resin, etc.), wax (paraffin, low molecular weight polyethylene, low molecular weight polypropylene, etc.), plastic (Process oil, paraffin oil,
Polybutene, polyisobutylene, etc.)
It is prepared by heat melting and mixing.

The photopolymerization initiator to be used is a compound which generates a radical upon irradiation with ultraviolet light or visible light. Specifically, benzoin ethers (benzoin isopropyl ether, benzoin isobutyl ether, etc.), benzophenones (benzophenone, p-methoxybenzophenone, etc.), and acetophenones (benzyl methyl ketal, 2,2-diethoxy, etc.) Acetophenone, 1,1-dichloroacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one and the like, thioxanthones (such as 2-chlorothioxanthone) and α-diketones (benzyl,
Acetonaphthophenone).

As the visible light polymerization initiator, camphorquinone (camphorquinone, 7,7-dimethyl-2,3
-Dioxobicyclo [2.2.1] heptane-1-carboxylic acid, 7,7-dimethyl-2,3-dioxobicyclo [2.2.1] heptane-1-carboxy-2-bromoethyl ester, 7,7-dimethyl-2,3-dioxobicyclo [2.2.1] heptane-1-carboxy-2
-Methyl ester, 7,7-dimethyl-2,3-dioxobicyclo [2.2.1] heptane-1-carboxylic acid chloride, etc., acylphosphine oxides (benzoyldiphenylphosphine oxide, 2,6-dimethylbenzoyl) Diphenylphosphine oxide, 2,
4,6-trimethylbenzoyldiphenylphosphine oxide, benzoyldiethoxyphosphine oxide, 2,4,6-trimethylbenzoyldimethoxyphenylphosphine oxide, 2,4,6-trimethylbenzoyldiethoxyphenylphosphine oxide, etc.), and phosphine oxide-based (Bis (2,6
-Dimethoxybenzoyl) -2,4-, 4-trimethylphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide, and the like.

Various stabilizers can be added in order to improve the storage stability of the photocurable composition and the heat stability during use during melt coating.

As a method of using the photocrosslinkable composition of the present invention, specifically, the composition is melted at a temperature of 80 to 140 ° C., and is applied to a bonding surface of an adherend with a thickness of 0.1 to 2 mm. And then irradiating with light.

Examples of the drug used in the present invention include various forms of fragrances such as liquids, powders, jellies, and solids.

[0069]

According to the present invention, there is provided a lid having a simple opening opening having a scenting function as a coating member for covering a concave portion containing a fragrance or the like formed on the lower surface of the lid main body of the lid having a simple opening opening. By using an object, during the heat treatment such as the retort treatment of the food and beverage container using the lid with the simple opening opening, the flavor and the like are prevented from leaking out of the concave portion, and the retention of the flavor and the like is ensured, and the package is opened. Sometimes excellent fragrance emission can be achieved.

[0070]

The present invention will be specifically described below with reference to examples and comparative examples. The methods for evaluating the retort treatment and the leakage of the fragrance in these are as follows. That is, a lid with a simple opening port was placed in a 140 ml glass container containing 70 ml of pure water, and heated at 125 ° C. for 30 minutes for retort treatment. After cooling to room temperature, the presence or absence of leakage of the fragrance of the fragrance into the water bath was checked.

Example 1 A photocurable composition was produced as described below. The flask was charged with 1250 g of polytail HA (manufactured by Mitsubishi Chemical Corporation) as a saturated hydrocarbon resin having hydroxyl groups at both ends of the molecule, and vacuum dried at a temperature of 120 ° C. for 1 hour. The internal temperature of the flask was set to 80 ° C., and 187.5 g of hexamethylene diisocyanate was charged so that NCO / OH = 2.0, and 0.2 g of dibutyltin dilaurate was added as a catalyst, followed by a prepolymerization reaction for 2 hours. Then, 129.5 g of NCO equivalent of hydroxyethyl acrylate was charged, and dibutyltin dilaurate was added to 0.1 g.
2 g was added and reacted for 2 hours to obtain an acrylate ester having an acryloyl group at both ends of the molecule.

On the other hand, 100 parts by weight of a block-shaped thermoplastic elastomer of a polystyrene-ethylene isoprene copolymer (Septon 2002; manufactured by Kuraray), an alicyclic saturated hydrocarbon-based tackifier (Alcon P-70; Arakawa Chemical) 24
0 parts by weight, paraffin wax (micro wax 1
80; Nippon Oil Co., Ltd.) and 140 parts by weight of hydrogenated polybutene (Polybutene 15H; Idemitsu Petrochemical) were heated and mixed at 170 ° C. to produce a resin component.

The obtained acrylate 20% by weight
And 80% by weight of a resin component are mixed at a temperature of 120 ° C., and Darocur 1173 (manufactured by Ciba-Geigy), an acetophenone-based ultraviolet polymerization initiator, is added thereto at 3% by weight based on the total amount of the acrylate ester and the resin component. Photocurable compositions were obtained by adding them in proportions.

In the embodiment shown in FIG.
After the fragrance 14 was put therein and covered with the aluminum foil 16, the photocurable composition heated and melted at a temperature of 120 ° C.
mm to a thickness of 0.3 mm, and pressed.
nm) at 100 mW / cm ² for 30 seconds to polymerize, thereby obtaining a lid with a simple opening port of the present invention.

<Example 2> The acrylic acid ester used in Example 1 was mixed at a temperature of 120 ° C so that the resin component became 50% by weight and the resin component became 50% by weight.
A lid with a simple opening port of the present invention was obtained in the same manner as in Example 1, except that a photocurable composition containing 3% by weight of No. 73 with respect to the total amount of the acrylic ester and the resin component was used.

<Example 3> Instead of the photopolymerization initiator of Example 2, an acylphosphine oxide-based visible light polymerization initiator, lucilin TPO (manufactured by BASF), was added to the total amount of the acrylate ester and the resin component. 1% by weight, and the visible light (436 nm) was changed to 30% at 100 mW / cm ² .
In the same manner as in Example 2 except that the polymer was irradiated and polymerized for 2 seconds,
A lid with a simple opening port of the present invention was obtained.

Example 4 In the synthesis of the acrylate of Example 1, hydroxyethyl methacrylate was used instead of hydroxyethyl acrylate, and a methacrylate compound having a methacryloyl group at both ends of the molecule was used. Is the same as in Example 1,
A lid with a simple opening port of the present invention was obtained.

<Comparative Example 1> A lid with a simple opening port was obtained using the resin component of Example 1 which did not contain an acrylic ester as a covering member.

<Comparative Example 2> A cover with a simple opening port similar to that of Example 1 was obtained using PPET-1025 (manufactured by Toagosei Co., Ltd.) as a hot-melt adhesive as a covering member. With respect to the lids with simple opening ports obtained in Examples 1 to 4 and Comparative Examples 1 and 2, perfume leakage was evaluated. The results are shown in Table 1 together with the formulation.

[0080]

[Table 1]

[0081]

According to the present invention, the lid with a simple opening is provided by a simple means of forming a covering member for covering a concave portion containing a medicine such as a fragrance formed on the lower surface of the lid body with a photocurable composition. Prevent the drug from leaking out of the concave part during heating treatment such as retort processing of food and beverage containers using a lid with a simple opening opening, ensure the retention of the drug, and provide excellent fragrance etc. when opened. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a lid with a simple opening port of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view of a main part showing attachment of a covering member in FIG. 2;

FIG. 4 is an enlarged sectional view of a main part showing another attachment of the covering member.

FIG. 5 is an enlarged sectional view of a main part showing still another attachment of the covering member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 simple opening lid 2 lid body 3 flange portion 4 flat plate portion 5 score line 6 opening forming portion 7 knob member 8 rivet 9 knob main body 10 mounting portion 11 locking hole 12 separating portion 13 concave portion 14 medicine 15 covering member 16 aluminum foil 17 Coating member

Claims (3)

[Claims] 1. A method according to claim 1, wherein a medicine is contained in a concave portion formed on a lower surface of a lid main body provided in the container, and the concave portion is covered with a covering member made of a photocurable composition. The opening forming portion is broken by the opening operation of lifting and a part of the opening forming portion is pushed into the container, and at the same time, a part of the covering member covering the concave portion of the lid main body is peeled to remove the medicine in the concave portion. A lid with a simple opening, characterized in that it can be diverged to the outside. 2. The photocurable composition has at least one (meth) acryloyl group in one molecule.
2. The lid with a simple opening according to claim 1, comprising an acrylic ester and a photopolymerization initiator. 3. The photocurable composition has at least one (meth) acryloyl group in one molecule.
2. The lid with a simple opening according to claim 1, wherein 5% by weight or more of the acrylate and 95% by weight or less of a resin component having a solid-state temperature and a fusibility are blended. .