JPS60110657A - Sealed vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed container that is strong and heat-sealed to withstand hot filling and heat sterilization, and includes a glass container body and a lid made of a metal foil resin laminate.

A lid made of metal foil resin laminate is heat-sealed to the open end of a glass container, which can be used for instant coffee,
It is widely used as an inner tube for the contents of powder mills, etc.

This inner seal type seal is subject to so-called peeling, and although peeling does not occur during normal handling, it can be easily peeled off with a finger when opening the seal. For this purpose, a so-called hot melt agent is used as a heat sealant (heat sealing material), which is a mixture of low density polyethylene or ethylene-vinyl acetate copolymer with a wax and a tackifier. ' Although this hot melt exhibits a satisfactory sealing property against the pressure of powdered contents, it is not suitable for long-term storage for liquid or semi-solid contents containing a large amount of water. A durable seal cannot be expected. Furthermore, hot filling or post-filling heat sterilization is used for contents containing a large amount of water, but the hot melt heat sealant described above is not suitable for high-temperature hot water or hot steam. However, there are serious drawbacks such as a significant decrease in heat seal strength and leakage.

Therefore, according to Ministry of Health and Welfare Notification No. 17 (enacted on August 1, 1972), food containers that are heat-sealed and sterilized by pressure and heat must have a heat-seal strength of 2.6 kg/l 5 mm or more. However, to the best of our knowledge, there is still no known glass container with a heat seal structure that satisfies this standard.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sealed glass container that eliminates the above-mentioned drawbacks of conventional heat-sealable glass containers.

Another object of the present invention is to provide a sealed container comprising a glass container body and a metal foil-resin laminate, which is equipped with a strong heat seal that can withstand hot-fill heat sterilization.

Another object of the present invention is that the heat seal strength is 2.6 kg/
To provide a sealed glass container having a sealing part of 15'cm or more.

According to the present invention, in a sealed container including a glass container body having an open end and a lid made of a metal foil resin laminate heat-sealed to the open end, the container body has an opening. There is provided a sealed container characterized in that the end portion and the lid are heat-sealed using a single layer of glass primer located on the open end side and carbon dioxide located on the lid side.

According to the present invention, there is further provided a sealed container comprising a glass container body having an open end and a lid made of a metal foil resin laminate heat-sealed to the open end. Heat sealing between the opening end and the lid is performed through a layer of glass primer located on the opening end side and a cull located on the lid side, and on the inside of the heat-sealed portion of the lid, A score demarcating the part to be opened is provided so as to reach the middle of the metal foil in the thickness direction,
There is provided a sealed container characterized in that the portion to be opened is provided with a shearing opening mechanism for performing a score shearing.

The present invention will be described below based on specific examples shown in the accompanying drawings, and in FIGS. 1 and 2 showing the entirety of a sealed container of the present invention, this sealed container includes a glass container body generally designated by 1;
It consists of a lid body shown as 10 as a whole.

The glass container has a cup shape consisting of a cylindrical or downwardly tapered side wall 2 and a bottom 6, and the upper open end 4 is a thick flange.

As shown in the enlarged cross-sectional view of FIG. 6, the lid body 10 is made of a laminate of a metal foil 11 and a resin inner material 12, which will be described in detail later. A resin protective layer 13 is provided.

A score 16 defining a portion 15 to be opened is provided inside the heat-sealed portion 14 of the lid 10 so as to reach halfway in the thickness direction of the metal foil 11'. Moreover, an unsealing mechanism 17 is provided integrally with this portion 15 to be opened. This opening mechanism 17 is for shearing the score 16 when opening the package, and in this specific example, there is no tab shape that allows the user to quickly trace the score 16. The tearing tip 18 and the score 16 are fixed to the lid body in a positional relationship such that they are substantially aligned. In the specific example shown in FIGS. 1 to 3, the portion 15 of the lid body to be opened has a through hole 2 close to the score 16.
0 is provided and the rivet 2 is provided integrally with the tab 17.
1 is inserted into the hole 20, its tip 22 is expanded along the lid, and is fused to the resin inner material 12, thereby sealingly fixing it.

An important feature of the sealed container of the present invention is that the open end 4 of the container main body is heat-sealed with the lid 10, and the first layer of glass primer 23 (see FIG. 3) located on the open end side is connected to the lid. The thermoplastic resin layer 12 is in the range of carbonyl and pm resin.

Glass containers have the advantages of excellent corrosion resistance, perfect gas barrier properties, and excellent transparency, but on the other hand, they have poor heat sealing properties and are especially resistant to hot water. It has the disadvantage that it is difficult to form a hermetic seal by heat sealing.

The exact reason for this is unknown, but according to the research of the present inventors, the glass surface is highly hydrophilic and has inherently poor thermal adhesion with resins, and that Even if thermal bonding is performed, when water acts on the bonded interface, the glass surface adsorbs water and adhesive failure progresses.

In contrast, according to the present invention, heat sealing is performed with the glass primer layer 23 interposed on the glass surface side and the carbonyl-containing thermoplastic resin layer 12 on the metal foil side, thereby making the heat sealing operation extremely easy. Moreover, it is not only possible to do this reliably, but it is also possible to introduce a strong heat seal between the lid and the edge of the glass container, which has a heat seal strength of 2.5 kg/15 grips or more. It has been found that this heat-sealed part hardly suffers from adhesive deterioration even when exposed to hot water or hot steam as well as ordinary water.

The glass primer used in the present invention helps form bonding points on the glass surface during heat sealing, and also prevents the formation of a water adsorption layer when water acts on the adhesive interface. It has the effect of preventing.

As the primer for glass, any primer can be used as long as it has the above-mentioned effect, but silane coupling agents, particularly aminosilane coupling agents, are particularly suitable for the purpose of the present invention. be able to. Suitable examples thereof include, but are not limited to:

Silane coupling agent γ-aminopropyltriethoxysilane, N-β(aminoethyl)γ-aminopropyltrimethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N-β(aminoethyl)γ-amino Amino-based silanes such as propylmethyldimethoxysilane.

γ-methacryloxypropyltrimethoxysilane, Methacryloxy silanes such as.

Vinyl silanes such as vinyltris(β-methoxyethoxy)silane, vinyltriethoxysilane, vinyltrimethoxysilane, vinyltrichlorosilane, etc. , β-(3,4 epoxycyclohexyl)ethyltrimethoxysilane, γ-glycidoxyglobiltrimethoxysilane, γ-glycidoxybrobylmethyldiethoxysilane, and the like.

Mercapto-based silanes such as γ-mercaptopropyltrimethoxysilane.

Chloropropyl silane such as γ-chloropropyltrimethoxysilane.

In addition to the silane coupling agent, chromium-based, titanate-based, inorganic-based primers, etc. can also be used as primers for glass, and suitable examples thereof are as follows.

Titanate coupling agents Isopropyl triisostearoyl titanate, Isopropyl tris dodecylbenzenesulfonyl titanate, Isopropyl tris (dioctyl pyrophosphate)
Titanate, Tetraisopropyl bis(dioctyl phosphite) titanate.

Tetdioctyl bis(ditridecyl phosphite) titanate, Tetra(2,2-diallyloxymethy/l/-1-butyl) bis(di-tridecyl) phosphite titanate, Bis(dioctyl pyrophosphate) oxyacetate titanate, Bis( Dioctylpyrophosphate) ethyl titanate, Isopropyltriophtynortitanate, Isopropyldimethacrylisostearoyltitanate, Isopropylisostearoyldiacryltitanate, Isopropyltri(dioctylphosphate)titanate, Isopropyltricumylphenyltitanate, Isopropyltri(N-amino) Ethyl-aminoethyl) titanate, dicumylphenyloxyacetate titanate, diisostearoyl ethylene titanate, polydiisopropyl titanate, tetra-n-butyl titanate, poly-di-n-butyl titanate, inorganic primer tin oxide, titanium oxide, indium oxide/tin oxide,
Chromium oxide/cobalt oxide, etc.

On the other hand, the carbonyl-containing thermoplastic resin melts under heat-sealing conditions to form a thermal adhesive bond, and in cooperation with the glass primer layer described above, it creates a sealed structure with high heat-seal strength and hot water resistance. It forms the

From this point of view, the carbonyl group based on carboxylic acid, carboxylate, carboxylic anhydride, carboxylic ester, carboxylic acid amide, ketone, carbonate ester, urea, urethane, etc. as a thermoplastic resin is 1 to 1000 mmol/100 g of resin. in particular from 10 to 600 mmol/
When a thermoplastic polymer containing a concentration of 10i resin is used, remarkable effects can be obtained in terms of heat-sealing workability, heat-sealing strength, and hot water resistance.

Suitable examples of such thermoplastic polymers include, but are not limited to:

(α) General formula % Formula % (2) In the formula, R1 is an alkylene group having 2 to 2 carbon atoms, and R6 is an alkylene group or arylene group having 2 to 24 carbon atoms.

For example, polyethylene adipate, polyethylene separate, polyethylene terephthalate, polytetramethylene isophthalate, polyethylene terephthalate/isophthalate, polytetramethylene terephthalate, polyethylene/tetramethylene terephthalate, polyethylene/oxybenzoate, or copolyesters thereof.

(A) A homopolymer or copolymer of a monomer of the general formula l, where R8 is a hydrogen atom or a lower alkyl group, and R4 is hydrogen, a serosa, or an alkyl group having 1 to 12 carbon atoms, or , above (3
) and olefins or copolymers with other vinyl monomers or acrylic-modified polyolefins.

For example, polyacrylic ester, polymethacrylic ester, ethylene/acrylic ester copolymer, acrylic ester/acrylic acid copolymer, ethylene/acrylic ester/acrylic acid copolymer, ethylene/acrylic acid copolymer , styrene/methacrylic acid ester/acrylic acid copolymer, acrylic acid kraft polyethylene, methacrylic acid graft polyethylene, acrylic acid ester/vinyl chloride copolymer, acrylic ester kraft polyethylene, methacrylic acid ester/vinyl chloride copolymer, styrene /methacrylic acid ester/butadiene copolymer, methacrylic acid ester/acrylonitrile copolymer.

(C) A copolymer of the vinyl ester and an olefin or other vinyl monomer, or a partially saponified product thereof, in which R3 is a hydrogen atom, an alkyl group, or a phenyl group.

For example, partially saponified ethylene-vinyl acetate copolymer, ethylene-vinyl propionate copolymer, ethylene/vinyl acetate copolymer, acrylic ester/vinyl acetate copolymer, vinyl chloride/vinyl acetate copolymer.

(d) A resin obtained by neutralizing a copolymer of an ionomer olefin and an unsaturated carboxylic acid or another vinyl monomer with an alkali metal, an alkaline earth metal, or an organic base.

For example, Boleyn products are commercially available from Debon Company, USA.

(g) Copolymers of maleic anhydride and other vinyl monomers or maleic anhydride-modified polyolefins, such as maleic anhydride/styrene copolymers, maleic anhydride-modified polypropylene, maleic anhydride-modified polyethylene.

(a) A polycarbonate represented by the general formula % formula % (5) where R6 is a hydrocarbon group having 8 to 15 carbon atoms.

For example, poly-p-xylene glycol biscarbonate, poly-dioxydiphenyl-methane carbonate,
Poly-dioxydiphenylethane carbonate, polydioxydiphenyl 2,2-propane carbonate, polydioxydiphenyl 1,1-ethane carbonate, or copolycarbonates thereof.

(g) General formula % formula % (6) (1 In the formula, ru is a number from 6 to 16, m is a number from 4 to 11, Polyamides consisting of repeating units represented by

For example, poly-ω-aminocaproic acid, poly-ω-amine hebutanoic acid, poly-ω-aminocaprylic acid, poly-ω
- aminoperaziic acid, poly-ω-aminodecanoic acid, poly-ω-aminoundecanoic acid, poly-ω-aminododecanoic acid, poly-ω-aminotridecanoic acid, polyhexamethylene adipamide, polyhexamethylene dodecamide, Polyhexamethylene dodecamide, polyhexamethylene tridecamide, polydecamethylene adipamide, polydecamethylene adipamide, polydecamethylene dodecamide, polydecamethylene tridecamide, boridodecamethylene adipamide, poly Dodecamethylene dodecamide, polydodecamethylene dodecamide, polydodecamethylene tridecamide, polytridecamethylene adipamide, polytridecamethylene adipamide, polytridecamethylene dodecamide, polytridecamethylene tridecamide, poly Hexamethylene azelamide, bolidecamethylene azelamide, boritridecamethylene azelamide, boritridecamethylene azelamide, or an interpolyamide thereof.

(n) A polyurea consisting of a repeating unit represented by the general formula, wherein each of R7 and R6 is an alkylene group having 1 to 13 carbon atoms.

For example, polyhexamethylene urea, polyhebutamethylene urea, polyundecamethylene urea, polynonamethylene urea.

(In the general formula, R is an alkylene group having 6 to 24 carbon atoms, a polyether residue, or a polyester residue; R, o is an alkylene group having 6 to 24 carbon atoms or an arylene group; R11 is an alkylene group having 6 to 24 carbon atoms; or an arylene group having 1 to 24 carbon atoms; 16 alkylene group or arylene group; is 0
or a number of 1: A polyurethane or polyureaurethane represented by:

For example, polytetramethylene hexamethylene urethane,
Polyhexamethylenetetramethyleneurethane, polyureaurethane made by chain-extending isocyanate-terminated polyester or polyether with diamine or water.

O) Resin particles obtained by oxidizing particles of polyethylene, polypropylene, or crystalline ethylene propylene copolymer with oxygen oxidation, ozone oxidation, or other oxidizing agents.

Carbonyl-containing resins having excellent hot water resistance and particularly suitable for the purpose of the present invention include, in order of importance, acid- or acid anhydride-modified polyolefins, copolyesters, copolyamides, ionomers, and the like.

These resins can be used alone or in the form of a blend of 24 or more. The resin should have at least a sufficient molecular weight to form a film,
If desired, these resin particles can be compounded with compounding agents known per se, such as ultraviolet absorbers, stabilizers, lubricants, antioxidants, pigments, dyes, antistatic agents, etc., according to known formulations. .

The carbonyl-containing resin described above is used in the form of a laminate with metal foil. This carbonyl-containing resin can be applied directly to the metal foil if it has thermal adhesion to the metal foil, or if it lacks adhesion to the metal foil, it can be applied to the metal foil via a urethane adhesive, epoxy adhesive, etc. layered on.

The thickness of the carbonyl-containing resin layer is not particularly limited, but from the viewpoint of heat-sealing workability and economic efficiency, it is preferably used at a thickness of 10 to 200 microns, particularly 20 to 100 microns.

Of course, instead of providing the resultant and rubonyl resin layer as a single layer, it can be provided in a multilayer structure of a plurality of combinations, and for the metal foil, polyethylene, polyethylene,
The carbonyl-containing heat sealant resin layer described above may be provided via a heat sealant layer not having a carbonyl group such as an ethylene-propylene copolymer.

In the present invention, a light metal foil such as aluminum foil is preferably used as the metal foil, but it is of course also possible to use an iron ring, steel foil, tin base, etc. From the viewpoint of heat sterilization resistance, it is preferable that these metal foils undergo pretreatment such as alumite treatment, boehmite treatment, chemical treatment with phosphoric acid and/or chromic acid, or chemical conversion treatment.

The metal foil needs to have some stiffness so that it can be torn at the score, and from this point of view, 50
It is desirable to have a thickness of μ or more, particularly 80 μ or more. The upper limit of the thickness of the metal foil is 200μ or less, especially 1
It is desirable that the thickness be 50μ or less.

It is important that the score provided on the metal foil stays in the middle of the thickness of the metal foil, from the viewpoint of gas barrier properties, pressure resistance, drop impact resistance, etc. The thickness of metal foil is 3 from the viewpoint of characteristics and ease of opening.
/1.0 to 7/10, especially in the range of 215 to 615, and the thickness of the metal foil remaining in the score part is 20μ or more,
Particularly preferred is one having a diameter of 60μ or more.

The resin protective layer provided on the outer surface of the metal foil can be made of high-strength plastic films such as biaxially oriented polyester film, biaxially oriented polypropylene film, biaxially oriented nylon film, epoxy-phenol paint, epoxy-urea paint, or epoxy melamine. Coatings such as paints, vinyl paints, acrylic paints, and epoxy-acrylic paints are used. If the resin protective layer used is a plastic film, it is necessary that the resin protective layer is completely cut off at the score (E), but if this protective layer is a paint film, the As shown, there is no particular disadvantage even if the top of the score is covered with a coating film.

In manufacturing the lid body 10, a laminate formed by a method known per se is punched out by press molding, etc., formed into a lid by forming the obituary rim portion and drawing the panel portion, and then formed into a lid using metal. Engraving the score on the foil. Finally, an opening mechanism such as an opening tab is fixed to form a sealed lid.

It is desirable that the glass primer layer 23 be provided in advance at the open end 4 of the glass container body 1 which is generally heat sealed. This primer layer 23 is formed by diluting this primer with a suitable solvent, applying it to the open end 4, and drying it. As for the thickness of the primer layer 23, even an ultra-thin film such as a monomolecular film can achieve sufficient effects, but in terms of heat sealing reliability, the thickness of the primer layer 23 should be 0.05 to 20 microns in terms of non-volatile content, and Special KO11 to 5. It is best to provide it with a thickness of microns.

Instead of providing the glass primer layer 26 at the open end of the glass container, it may be provided on the surface of the carbonyl-containing resin layer of the lid, or it may be blended into the carbonyl-containing resin layer. When this means is used, the opening end of the glass container is coated with a primer at the same time as heat sealing.

In FIG. 4 showing another embodiment of the present invention, a glass primer layer 23 is provided at the open end of the container to be heat-sealed, and a layer 12 of carbonyl-containing thermoplastic resin is further provided on the glass primer layer 23.
' is provided in advance. This layer 12' is formed by applying the resin in the form of a solution, emulsion or suspension and drying it. Further, it can also be formed by means such as electrostatic coating or explosive spraying. According to this aspect, the resin layer 12' on the container side and the resin layer 12 on the lid side are melted together and heat-sealed, so that the sealing is performed reliably within a short time, especially at the heat-sealed interface. It has the advantage that heat sealing can be performed reliably even if there are foreign objects inside.

In the present invention, it is obvious to those skilled in the art that for applications in which the seal is opened using a can cutter or other opening mechanism, it is not necessary to engrave a score on the lid or to fix the opening mechanism. Dew.

In addition, the shape of the score is not only circular, square, rectangular, etc. to open the entire inside of the seal, but also a small circle or raindrop-shaped score is carved only on a part of the inside of the seal. It is also possible to open from.

When using the container, after hot or cold filling the contents into the container body 1 and purging the atmosphere with water vapor, nitrogen, etc. as necessary, the lid 10 is attached to the container body 1, and the flange 4 and the carbonyl-containing material on the lid side are replaced. The resin film layer 12 is stacked so that they face each other, and heat sealing is performed by heating the flange portion under pressure. This heating temperature is higher than the melting point of the film layer 12, and the pressure is generally 1 to 10 kg/cm.
Perform under m' gauge pressure. This heat sealing operation can be easily carried out using a heat sealing means known per se, such as a heat seal bar or high frequency induction heating.

The heat-sealed portion formed by the present invention can withstand sterilization operations such as hot filling, boiling water sterilization, and retort sterilization.
Combined with the high degree of sealing reliability, food products can be stored stably for long periods of time.

The invention is illustrated by the following example.

Example 1 The uncoated surface of a 100μ thick soft aluminum foil coated with an epoxy resin on the outside was a low density polyethylene grafted with maleic anhydride, an average carboxyl group concentration of 50 mmol/100 g, a resin with a melting point is 110℃,
Modified polyethylene with an MI of 14 I/10 minutes was coated using an extrusion coating method, heat treated in an oven maintained at 200°C, and cooled with a chill roll, resulting in a composition of epoxy resin paint layer/100 μ aluminum foil 150 μ modified polyethylene. A laminate of layers was obtained.

Next, a lid intermediate body was produced from this laminated sheet, which was formed into a drop-lid shape, subjected to full-open score processing, and having small holes cut out in the panel portion.

Next, an opening tab in which an opening ring and a rivet were integrated as shown in FIG. 2 was manufactured from medium density polyethylene by injection molding.

The rivet part of this opening tab is inserted into the small hole of the lid intermediate body, and the rivet head is formed as shown in FIG. Welded to layers.

Next, a 2% water-water-ethanol solution of r-aminopropyltriethoxysilane was applied to the open end 4 of the glass pot-shaped container main body as shown in FIG. 1, and dried.

This glass container body was filled with orange juice at 80° C., the lid was sealed at the open end of the glass container with a 4-heat sealer, and the container was cooled by being poured into cooling water at room temperature.

The container thus obtained was kept under vacuum and had sufficient sealing performance. This hermetically filled container was stored upside down at room temperature for 6 months, and its sealability was examined and the sealability was perfect. Furthermore, when the tab was opened, the opening could be performed smoothly along the score. Further, at this time, no peeling was observed at the heat-sealed portion.

Example 2゜External surface coated with epoxy phenol paint, thickness 100
A resin with an average carboxyl group concentration of 50 mmol/100 g and a melting point of 110 mmol/100 g is made by grafting maleic anhydride onto low-density polyethylene on the unpainted surface of μ soft aluminum foil.
℃, Ml was 14 g/10 min using the first extruder having a screw with a diameter of 50 φ, and the melting point was 109° C., the density was 0.915 g/cc, and the Ml force Z
12. ! A second extruder with a screw having a diameter of 65 mm was used to make low-density polyethylene with a width of 650 mm at a resin temperature of 250°C at the die part.
The modified polyethylene is co-extruded from a coat hanger type 2-layer T die with a positional system where it contacts the aluminum foil, and is crimped onto a V-roll with a diameter of 400 mm with a silicone roll with a diameter of 200 mm. Temporary adhesion was performed by doing this. Next, this temporarily bonded laminate was thermocompressed using a heat-treated roll with a diameter of 400mm and a silicone roll with a diameter of 200mm, which were kept at a temperature of 200°C.
■φ(7) By cooling with a silicone roll,
A laminate having a structure of epoxyphenol paint layer/100μ aluminum foil/10μ modified polyethylene layer and 150μ low density polyethylene layer was obtained. A score lid similar to that in Example 1 was prepared from the resulting laminate.

Next, a 2% solution of γ-aminopropyltriethoxysilane in water, water, and ethanol was applied to the open end 4 of the glass pot-shaped container body as shown in FIG. 1, and then dried. Next, the powdered maleic anhydride-modified low-density polyethylene was applied to the silane coupling agent-treated surface of the open end 4 as shown in FIG. It was heated to melt and allowed to cool.

The glass container body thus obtained was filled with grape juice at 90° C., the lid was sealed at the open end of the glass container with a heat sealer, and the container was cooled by putting it into cooling water at room temperature.

The container thus obtained was kept under vacuum and had sufficient sealing performance. When this sealed container was stored upside down at room temperature for 6 months, the sealability was examined and the sealability was perfect. Furthermore, when the tab was opened, the opening could be performed smoothly along the score. Further, at this time, no peeling was observed at the heat-on-ru portion.

Also, when hot-packing grape juice, we tried heat-sealing the container with the grape juice overflowing from the container, but the seal was perfect.

Comparative Example 1゜In Example 1, γ-
When using aminopropyltriethoxysilane that was not treated, heat sealing was possible, but
When stored upside down, the orange juice contents leaked from the heat seal part after one day.

Example 6~6゜Thickness: 100゜ coated with epoxy phenol paint on the outside surface
A thermoplastic resin inner layer capable of being thermally bonded to the metal shown in Table 1 was thermally bonded to a soft aluminum foil of μ by the method shown in Table 1, and a laminate was prepared by cooling with a cooling roll.

These laminates were punched, molded, scored, holed, and tabbed to create lids similar to those in Example 1.

Next, the glass container bodies used in Example 1, whose open ends 4 were treated with silane, were filled with orange juice at 80° C., and the open ends of these lidded glass containers were sealed with a heat sealer. When these sealed and filled containers were stored upside down at room temperature for 3 months, the sealability was examined and the sealability was perfect. Furthermore, when the tab was opened, the opening could be performed smoothly along the score. Further, at this time, no peeling was observed at the heat-sealed portion.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the sealed container of the present invention, and FIG. 2 is a sectional view showing the sealed container of the present invention.
FIG. 6 is a partially enlarged sectional view showing the heat-sealed portion of the sealed container of the present invention; FIG. 4 is a top view of the sealed container of the present invention; and FIG. 4 is the heat-sealed portion of the sealed container of another embodiment of the present invention. It is a partially enlarged sectional view showing the reference numeral 1, the main body of the glass container, 2 the side wall, 6 the bottom, 4 the open end, 1
0 indicates a lid body, 11 indicates a metal foil, 12 indicates a resin inner material, 16 indicates a resin protective layer, 16 indicates a score, and 17 indicates an opening mechanism. Patent applicant Akira Kishimoto Figure 3 Figure 4

Claims (2)

[Claims] (1) In a sealed container comprising a glass container body having an open end and a lid made of a metal foil resin laminate that is heat-sealed to the open end, the container body has an open end and 1. A sealed container characterized in that heat sealing with a lid body is performed through a heat-sealable thermoplastic resin layer located in the range of a glass primer layer located on the open end side. (2) In a sealed container comprising a glass container body having an open end and a lid made of a metal foil resin S layer heat-sealed to the open end, on the open end side. This is done through the thermoplastic resin layer in the range of the primer layer for glass, and on the inside of the heat-sealed part of the lid, there is a score that demarcates the part to be opened in the thickness direction of the metal foil. 1. A sealed container, characterized in that the container is provided so as to reach the middle of the score, and a shearing opening mechanism for shearing the score is provided in the portion to be opened.