WO1999061346A1 - Packaging material and container for sealing beverage and food - Google Patents

Abstract

A packaging material and a container as a packaging means for beverage and food heated for intake by a microwave oven which can provide the least risk of bumping or boilover during heating without taking measures such as unpacking them or making holes in them before heating, wherein the covers of the packaging material and container comprises a nonpermeable material basic body having a gas discharge hole and a nonpermeable cover body which covers the gas discharge hole and is stuck on one surface of the basic body, and the cover body or a part of the cover body is stuck to the basic body at such a sticking strength that it is peeled off when a pressure of excess gas produced from a packaged food and beverage acts on the cover body through the gas discharge hole.

Description

 Description Packaging material and container for sealing food and drink

 Technical field

 The invention of this application includes, for example, beverages such as coffee and tea, liquid foods such as soups and miso soups, foods containing a large amount of water such as cooked rice and curry, and liquids or a large amount of water by heating. Formed into a lid to seal a container filled with frozen foods, etc. that become food (hereinafter collectively referred to as "foods"), or a bag, tube, etc. to package foods and beverages The present invention relates to a packaging material used as a package (hereinafter, a package formed into a bag, a tube, or the like is collectively referred to as a “package bag”), and a container for sealing food and drink. More specifically, the invention of this application is intended for heating food and drink filled in a container or food and beverage filled in a packaging bag before ingesting without opening a lid or a packaging bag sealing the container. The present invention relates to a packaging material capable of reheating a sealed container or a packaging bag as it is by a microwave oven, and a container for sealing food and drink. Background art

In recent years, a wide variety of foods and drinks heated by a microwave oven or the like have been marketed. Consumers who purchase such foods and beverages should open the container lid or packaging bag before heating the food or beverage sealed container or packaging bag with a microwave oven or the like, and transfer the filled food or beverage to another container. Transferring to a container, removing part or all of the container lid, or opening part or all of the packaging bag. If the container or packaging bag is heated in a microwave oven as it is, the pressure will increase as the liquid inside the container evaporates, causing the container or packaging bag to rupture and contaminate the inside of the microwave oven. This is because It is also practiced to pierce the lid or part of the packaging bag of the container before heating to prevent the rupture of the container or packaging bag by discharging air, steam, etc. from the container. Tools and labor for drilling are required. In addition, perforations were made at the store where the product was purchased. ■ When heated, food and beverages leaked from the perforated part due to the perforation, which was inconvenient for transportation.

 Therefore, in order to solve these inconveniences, a container with multiple layers of lids to seal the container, the upper layer of the lid can be peeled off, and a gas vent hole is formed in the lower layer (J.K. Japanese Patent Publication No. 24 381, Japanese Utility Model Publication No. 7-52058, and Japanese Patent Publication No. 62-12999: Hereinafter, "prior art 1 j" has been proposed. In addition, packaging materials made by laminating an air-permeable film or paper with a synthetic resin film having openings (see Japanese Patent Application Laid-Open Nos. 63-63353 and 63-596767). Public notice: Hereinafter, "Prior art 2 J" is also known.

 However, in prior art 1, gas removal holes are provided by peeling off the upper layer of the lid, so a tool for drilling is not required.However, if heating is performed without peeling off the upper layer of the lid, the inside of the container will be removed. The pressure may increase and the container may burst. After the upper layer is peeled off, it is difficult to transport the container due to the presence of an opening in the lid.

 On the other hand, in the prior art 2, the pressure inside the package does not increase due to the heating because the packaging material is air-permeable, but there is a risk of contamination from the outside due to the air permeability of the packaging material, which causes quality problems. I do. Disclosure of the invention

 The purpose of this application is to provide a packaging material for sealing food and drink, which can be directly heated by a microwave oven without any pretreatment of a packaging bag for sealing food and drink using this packaging material. To provide.

Another object of the present application is a container for sealing food and drink, which can be directly heated by a microwave oven without any pretreatment. An object of the present invention is to provide a container for sealing food and drink. The first invention of this application is a packaging material having a base made of a non-breathable material having a gas discharge hole, and a non-breathable cover body which covers the gas discharge hole and is adhered to one surface of the base. The cover body is adhered to the base with an adhesive strength that is peeled off when excess gas pressure generated from the food or beverage packaged with the packaging material acts on the cover body through the gas discharge hole. It is a packaging material characterized by the following.

 In the packaging material of the first invention, it is a desirable embodiment that the adhesive strength between the base and the cover is 100 to 1,650 gf / 15 mm.

 In the packaging material of the first invention and / or the above-mentioned embodiment, the cover has a second gas discharge hole, and the second gas discharge hole is located at a position not overlapping with the gas discharge hole of the base. It is a desirable mode that it is formed. The second invention of this application is a packaging material having a base made of a non-breathable material having a gas discharge hole, and a non-breathable cover body which covers the gas discharge hole and is adhered to one surface of the base. A part of the cover body is adhered to the substrate with an adhesive strength that is peeled off when excess gas pressure generated from the food or beverage packaged with the packaging material acts integrally with the cover through the gas discharge hole. In addition, the packaging material is characterized in that the peeled cover portion forms a gas exhaust path for conducting the gas exhaust hole and the outside of the packaging material.

 In the packaging material of the second invention, it is preferable that the gas discharge path is formed by bonding the base and the cover with an adhesive strength of 50 to 800 gf / 15 mm.

In the packaging material of the second invention and / or the above-described embodiment, the gas discharge path is formed by bonding the base and the cover with an adhesive strength of 5 to 80% of the adhesive strength in a portion other than the gas discharge path. in packaging materials and Z or the aspect of _t the second invention that the desired embodiment in that it is formed, cover - body, the base body It is preferable that a second gas discharge hole is provided at a position not overlapping with the gas discharge hole, and a gas discharge path is formed between the gas discharge hole and the second gas discharge hole. And A third invention of this application is a container having a microwave-permeable container main body and a lid for hermetically sealing the container main body, wherein the lid is made of a non-breathable material base having a gas discharge hole; The cover body has an air-impermeable cover integrally bonded to the upper surface of the base by covering the gas discharge hole. The cover body is configured such that excess gas pressure generated from food or drink in the container body is applied via the gas discharge hole. A food and beverage sealing container characterized by being adhered to a substrate with an adhesive strength that is peeled off by acting on a cover body.

 In the container of the third invention, it is a desirable embodiment that the adhesive strength between the base and the cover is 100 to 1,650 gf / 15 mm.

 In the container and / or the above embodiment of the third invention, the cover has a second gas discharge fL, and the second gas discharge hole does not overlap with the gas discharge hole of the base. It is a desirable mode that it is formed at a suitable position.

 In the container of the third invention and / or the above-mentioned embodiments, it is preferable that the lid has a tongue piece and that the tongue piece is formed by extending the base. .

 Further, in the above aspect, it is preferable that the second gas discharge hole is formed at a position opposite to the tongue piece.

 In the container of the third invention and / or the above-mentioned embodiment, the gas discharge hole of the base has a reclosing prevention section at the periphery of the hole, and the base has one or two or more re-closable parts other than the gas discharge hole. It is a desirable mode to have a cut for preventing closure.

In the container and the container according to the third aspect of the invention or the above-described embodiment, the container body has a microwave shielding layer on a side surface portion, and the microwave shielding layer is sealed. It is also preferable that the upper surface of the food or drink is disposed so as to cover a portion in contact with the container body. A fourth invention of this application is a container having a microwave-permeable container main body and a lid for hermetically sealing the container main body, wherein the lid is made of a non-permeable material base having a gas discharge hole; It has an air-impermeable cover integrated with the gas discharge hole and adhered to the upper surface of the base.A part of the cover body is designed to discharge excess gas generated from food and drink in the container body. ? It is adhered to the base with adhesive strength that is peeled off by acting integrally with the cover through the L, and the peeled cover body forms a gas discharge path that connects the gas discharge hole and the outside of the lid. It is a container for sealing food and drink.

 In the container of the fourth invention, it is preferable that the gas discharge path is formed from the gas discharge hole to the lid rim.

 In the container of the fourth invention and / or the above-described embodiment, the cover body has a second gas discharge hole at a position that does not overlap the gas discharge hole of the base, and the gas discharge path includes the gas discharge ¾ and the second gas discharge hole. It is preferable that the gas discharge hole is formed between the gas discharge holes.

 In the container of the fourth invention and / or the above-described embodiment, it is a preferable embodiment that the gas discharge path is formed by bonding the base and the cover with an adhesive strength of 50 to 800 gf / 15 mm. .

 In the container and / or the above-described embodiment of the fourth invention, the gas discharge path is formed by bonding the base and the cover with an adhesive strength of 5 to 80% of the adhesive strength in a portion other than the gas discharge path. It is a desirable mode that it is formed. In the container of the fourth invention and / or the above-described embodiment, it is preferable that the lid has a tongue piece and that the tongue piece is formed by extending the base. I have.

In the above aspect, the tongue piece is located at a position opposite to the terminal end of the gas discharge path. It is also preferable that the contact hole is formed on the surface.

 In the container and the container according to the fourth aspect of the invention or the above-described embodiment, the gas discharge hole of the base has a reclosing prevention piece on the periphery of the hole, and the base is provided with one or more pieces at positions other than the gas discharge hole. It is a desirable mode to have a break for reclosing prevention.

In the container of the fourth invention and / or the above-mentioned embodiment, the container main body has a microwave shielding layer on a side surface portion, and the microwave shielding layer is formed such that an upper surface of the food or beverage to be sealed is a container. It is also preferable that the cover is arranged so as to cover a portion in contact with the main body. In addition, in each invention of this application, “adhesive strength” is a value measured by the following method. For example, using a tensile tester equipped with two chucks (for example, STROGRAPH-W type manufactured by Toyo Seiki Co., Ltd.), the ends of the two test pieces bonded to each other are peeled off slightly, and the peeled ends are removed. Are held between two chucks, and the two chucks are separated from each other at a speed of 20 mm / min to measure the load value when the two test pieces are peeled off, and this load value is bonded. Strength. In addition, the values of the adhesive strength were unified by converting the width of the test piece to 15 mm, and expressed in units of “ _rg f / l 5 mm”. BRIEF DESCRIPTION OF THE FIGURES

 FIGS. 1 and 2 are a front view and a rear view, respectively, of a lid of a container showing an embodiment of the packaging material of the first invention. FIGS. 3 and 4 are X-rays of FIG. 1, respectively. It is an X 'sectional view and a YY' sectional view. FIG. 5 is a cross-sectional view of the container sealed with the lid. A is a container body, B is a lid, C is a container, 1 is a base, 2 is a cover body, 3 and 6 are adhesives, 4 is a tongue piece, 5 is a gas discharge hole, and 7 is a flange.

FIG. 6 is an external view showing an embodiment of the packaging material of the first invention, and FIG. 7 is a partially enlarged cross-sectional view taken along line ZZ ′ of FIG. D is packaging bag, 10 and 1 1 are horizontal Reference numeral 12 denotes a vertical seal.

 FIG. 8 is an external perspective view showing an embodiment of the container of the third invention, and FIG. 9 is a partially enlarged sectional view taken along line VV ′ in FIG. 8 is a second gas discharge hole. FIG. 10 is an external perspective view showing the operation of the tongue piece in the container of FIG. 8, and E is an overcap.

 FIG. 11 is an external view of a packaging bag showing another embodiment of the packaging material of the first invention, and FIG. 12 is a partially enlarged sectional view taken along line WW ′ of FIG. . F is a packaging bag.

 FIGS. 13 and 14 are a front view and a rear view, respectively, of the lid of the container showing an embodiment of the packaging material of the second invention, and FIGS. 15 and 16 are X-sections of FIG. FIG. 3 is a partially enlarged cross-sectional view taken along line X ′ and line YY ′. FIG. 17 is a partial cross-sectional view of the container sealed with the lid. 9 is a gas discharge path. FIG. 18 is an external view showing another embodiment of the packaging material of the second invention, and FIG. 19 is a partially enlarged sectional view taken along the line ZZ ′ of FIG.

 FIG. 20 is an external perspective view showing one embodiment of the container of the fourth invention, and FIG. 21 is a partially enlarged sectional view taken along line VV ′ of FIG.

 FIG. 22 is an external view of a packaging bag showing another embodiment of the packaging material of the second invention.

 FIGS. 23 and 24 are rear views of the lid used for the container of the fourth invention. Reference numeral 13 denotes a reclosing prevention section.

 FIG. 25 is a rear view showing another embodiment of the lid used for the container of the fourth invention. 14 is a break for reclosing prevention.

FIG. 26 is an external perspective view showing still another embodiment of the lid used for the container of the fourth invention, and FIG. 27 is a partially enlarged cross-sectional view taken along line U-U ′ of FIG. 15 is a step, 16 is an aluminum foil layer, 17 is a heat insulating layer, and 18 is a coating layer. BEST MODE FOR CARRYING OUT THE INVENTION

 The packaging material of the first invention has a base and a cover, and when used for sealing food and drink heated by a microwave oven, is made of a non-metallic material and a non-breathable material. You. Examples of such materials include plastic materials such as polyester, nylon, polypropylene, polyethylene, and polystyrene resin, laminated materials of these plastic materials, and laminated materials of paper, paper, and plastic materials. it can. When not used for food and drink heated by a microwave oven, a metal material such as an aluminum foil can be used in addition to the above materials.

 The substrate of the packaging material of the first invention has a thickness of 4 to 300 m, preferably 50 to 100 m. The base is adhered to the container flange or the like or the bases with high strength, and a relatively large force acts upon peeling. Therefore, from the viewpoint of preventing breakage of the base during the peeling, the thickness as described above is used. It is appropriate to do.

 The base is provided with a gas discharge hole for discharging excess gas from inside a container or a packaging bag formed using the packaging material. The shape and number of the holes can be appropriately determined according to the volume of the container or the packaging bag, the amount of the food or drink to be filled, the water content, and the like. In other words, the gas discharge hole only needs to be able to achieve the purpose of discharging excess gas from the container or the packaging bag. The shape of the gas discharge hole is not only the circular shape shown in the embodiment but also an elliptical shape, a polygonal shape, and a character shape. Etc., any shape may be used. In addition, the size of the gas discharge holes only needs to be a size that can achieve the purpose, and the same applies to the number of the gas discharge holes.

The cover material of the packaging material of the first invention has a thickness of 4 to 500 m, preferably <10 to 300 m, so that it is easy to peel off from the substrate due to an increase in the pressure in the container or the packaging bag. . The cover body covers the gas discharge hole and is adhered to the base with an adhesive. The bonding strength between the base and the cover is 100 to 1,650 gf / 15 mm at room temperature, preferably about 150 to 1,250 gf / 15 mm. If the bonding strength is less than 100 gf / 15 mm at room temperature, the adhesion may be impaired and the sealing property may be impaired.If the bonding strength exceeds 1,65 gf / 15 mm However, when the pressure inside the container or the packaging bag is increased, the cover body does not peel off from the base, and the container or the packaging bag may be damaged.

 Examples of the adhesive include polypropylene, polyethylene, ethylene monoacrylic acid resin, ethylene vinyl acetate resin, polyurethane resin, acrylic resin, and wax. The thickness of the adhesive layer made of these adhesives is 1 to 50 jum, preferably about 2 to 30; um.

 The packaging material of the first invention configured as described above is formed into, for example, a container lid, bag shape, tube shape, or the like, and is used for packaging food and drink. When used as a lid for a container, for example, this packaging material is molded into almost the same shape as the outer shape of the flange of the container, and after filling the container with food and drink, it is attached to the flange of the container. You. Attach the lid to the container, for example, so as to adhere relatively strongly with an adhesive or the like. When this packaging material is used as a packaging bag, for example, one piece of packaging material of an appropriate size is bent. After filling, the open substrates may be relatively strongly bonded to each other with an adhesive. When two pieces of packaging material are used, the bases on the three sides are bonded to each other, and the food or drink is filled from one of the openings, and then the bases at the openings are relatively strongly bonded to each other with an adhesive. do it. Alternatively, the food or drink may be stored in a rigid container, and the container may be packaged with a packaging material and sealed.

 When heat-sterilizing foods and beverages to be filled in these containers or packaging bags, the foods and beverages must be sterilized in advance, and after filling the containers or packaging bags under aseptic conditions, the containers or packaging bags should be sealed. . In the case of sterilization by a method other than heating, the food or beverage can be sterilized together with the sealed container or the sealed packaging bag after filling the food or beverage into a container or a package and sealing it.

Adhesion between the substrates or between the substrate and other articles (for example, containers) can be performed using a resin or adhesive such as polypropylene, polyethylene, polystyrene, ethylene-acrylic acid-based resin, and ethylene-vinyl acetate resin. it can. Adhesive strength, packaging It is strongly bonded compared to the bonding strength between the base material and the cover. For example, it is 300 gf / 15 mm or more at room temperature, preferably about 800 to 1,500 gf / 15 mm. If the adhesive strength is less than 300 gf / 15 mm at room temperature, the sealing property may be impaired. It is desirable that the adhesive strength between the base and the cover in the packaging material of the first invention is adjusted to about 23 or less of the adhesive strength between the bases or between the base and other articles.

 When food or beverage packed in a container or a packaging bag molded using the packaging material of the first invention is heated in a microwave oven, the gas provided on the base is increased due to an increase in pressure in the container or the packaging bag due to the heating. The base pressure acts on the relatively weak adhesive layer between the base and the cover through the discharge hole, and the pressure causes the recovering body to peel off from the base, and excess gas is discharged out of the container or the packaging bag. Therefore, the food or beverage can be directly heated without opening or piercing the container or the packaging bag.

 Further, since the packaging material of the first invention is constituted by a non-breathable base and an integrated cover, the packaging material is sealed in a container using the packaging material as a lid or a package made of the packaging material. Food and beverages can be stored hygienically. Moreover, even if these containers or packaging bags are heated in a microwave oven as they are, they do not contaminate the inside of the microwave oven by rupture, and there is no danger of burns or the like due to the ejection of the heated food or drink. Even if it is heated with a microwave at the store where it was purchased, it can be easily transported outside the store. Furthermore, since these containers or packaging bags are sealed by a single piece of birch, it is also effective in preventing excessive evaporation of water due to heating and bumping.

 It should be noted that the container or packaging bag using the packaging material of the first invention may be generated in the container or packaging bag even when storing foods or beverages that emit gas during storage (for example, fermented vegetables and the like). Excess gas is discharged through the gas discharge holes in the base of the packaging material, so that the package is not damaged and can be stored safely.

One of the desirable aspects of the packaging material of the first invention is that the cover body has a second gas discharge hole at a position not overlapping with the gas discharge hole of the base. The second gas discharge hole does not need to always be large and may be, for example, a small cut notch integrally with the cover. At least, when gas, vapor, and the like are discharged from the gas discharge holes formed in the base, the second gas discharge holes may be opened. That is, when food or beverage packaged in a container or a packaging bag using the packaging material of the first invention is heated by a microwave oven, excess gas generated by the heating is integrated with the cover through the gas discharge holes of the base. Pressure is applied to the cover to separate the cover from the substrate. At this time, if there is no second gas discharge hole, the gas must be discharged out of the container or packaging bag unless the cover from the gas discharge hole of the base to the end of the packaging material peels off. Can not. Therefore, if the cover is perforated with the second gas discharge hole, if at least the cover is peeled off at least in a narrow space from the gas discharge hole of the base to the second gas discharge hole, the container or the packaging bag will be removed. It is possible to conduct inside and outside. In view of such an effect of the second gas discharge hole, it is more desirable that the position of the second gas discharge hole is a position appropriately close to the position of the gas discharge hole of the base.

 Further, the second gas discharge hole only needs to be able to achieve the purpose of discharging excess gas from the container or the packaging bag. The shape of the second gas discharge hole is circular, elliptical, in addition to the cut shape shown in the embodiment. Any shape such as a shape, a polygonal shape, and a character shape may be used. The size of the holes may be any size that can achieve the purpose, and the same applies to the number of holes. The packaging material of the second invention of this application is similar in basic configuration to the packaging material of the first invention. Further, the material and thickness of the base and the cover are integrated, and the type of the adhesive used for bonding the both can be the same as the packaging material of the first invention.

A packaging material according to a second invention is characterized in that a gas discharge path is formed in the packaging material according to the first invention. This gas discharge path is formed at a position where the gas discharge hole and the outside of the packaging material are conducted, by making the adhesive strength between the base and the cover body smaller than the adhesive strength of other parts. In the gas discharge path, a part of the cover is separated from the base by the pressure of the excess gas discharged from the gas discharge holes of the base, and the thickness of the adhesive layer of the adhesive at this part is 1 mm. ~ 50 / m, preferably about 2-30 m.

 The adhesive strength between the substrate and the cover at the portion where the gas exhaust path is formed is 50 to 800 gf / 15 mm at room temperature, and preferably about 100 to 400 gf / 15 mm. If the bonding strength is less than 50 gf / 15 mm at room temperature, the sealing property may be impaired due to insufficient bonding.If the bonding strength exceeds 800 gf / 15 mm at room temperature, it will be in a container or packaging bag. This is because the cover is not separated from the base even by the gas pressure from the container, and the container or the packaging bag may be damaged because the gas discharge path is not conducted.

 To ensure that the cover part corresponding to the gas discharge path is peeled off, the adhesive strength between the substrate and the cover body in the gas discharge path must be 5 to 80% of the adhesive strength in the parts other than the gas discharge path. It is desirable that

 It is recommended that the adhesive strength between the base and the cover body in the part other than the gas discharge path be 800 to 2,000 gf / 15 mm at room temperature. With the adhesive strength in this range, the cover other than the gas discharge path does not peel off due to excessive gas pressure. A plurality of gas discharge paths may be formed for one gas discharge hole. In such a case, the inside and outside of the package need only be electrically connected via one of the gas discharge paths, so that the reliability of gas discharge is increased. Further, it goes without saying that the number of gas discharge holes is not limited to one, and a plurality of gas discharge holes may be provided.

 The packaging material of the second invention configured as described above, like the packaging material of the first invention, is formed into, for example, a container lid, a bag, a tube, or the like, and is used for packaging food and drink. The container or the packaging bag formed by using the packaging material has the same convenience as the container or the packaging bag using the packaging material of the first invention.

As described above, in the packaging material of the second invention, since the adhesive strength between the base and the cover portion corresponding to the gas discharge path is weaker than the adhesive strength of the other portions, when the container or the packaging bag is heated, , Quick gas discharge due to excessive gas pressure generated from food and drink The path is conducted, and the other part does not peel off the base and the cover body. For this reason, the possibility of heated foods being spilled over is extremely low. Also, there is no loud popping sound when the entire cover is peeled off from the base.

 Note that the packaging material of the second invention is characterized in that the gas rest discharge path is conducted by excessive gas pressure discharged through the gas discharge holes of the base. For example, when the gas discharge path is closed by a molten material that melts at a high temperature, and when the container or packaging bag is heated by an electronic range, the molten material is heated and melted, and the gas discharge path becomes conductive ( For example, the principle is fundamentally different from that of Japanese Unexamined Patent Application Publication No. 8-151804. The packaging material of the second invention is less costly than using such a molten material, and there is no danger of the molten material being mixed into the food or drink. One of the desirable aspects of the packaging material of the second invention is that the cover body has a second gas discharge hole, and the second gas discharge hole is formed at a position that does not overlap with the gas discharge hole of the base. That is.

The second gas discharge does not need to always have a large opening, and may be, for example, a small cut into the cover. At least, when excessive gas or vapor is ejected from the gas discharge holes formed in the base, the second gas discharge holes may be opened. When the second gas discharge hole is provided, the gas discharge path is disposed at a position where the gas discharge hole of the base and the second gas discharge hole are conducted. That is, when food or beverage packaged in a container or a packaging bag using the packaging material of the second invention is heated by a microwave oven, excess gas generated by the heating is discharged from the gas discharge holes of the substrate and the substrate is heated. Pressure is applied to the relatively weak adhesive layer between the cover and the cover body, and the cover body in this area is peeled off and the gas discharge path is conducted. At this time, if there is no second gas discharge hole, if the gas discharge path does not conduct from the gas discharge hole of the base to the end of the packaging material, excess gas is discharged outside the container or the packaging bag. Cannot be discharged to Therefore, if the second gas exhaust hole is perforated integrally with the cover, the gas exhaust path is conducted only at least from the gas exhaust hole of the base to the second gas exhaust hole. You can do it. In consideration of the function of the second gas discharge hole, the position of the second gas discharge hole is determined based on whether the gas is discharged from the substrate. It is desirable that the position is appropriately close to the position of L (a range from 2 mm to 30 mm from the hole, preferably a range from 5 mm to 10 mm).

 The third invention of this application is a container for sealing food and drink using the packaging material of the first invention. The container according to the third aspect of the invention includes a container body for filling food and drink, and a lid made of the packaging material according to the first aspect of the invention. The container body is made of a microwave-permeable material that can be heated in a microwave oven, and examples thereof include a synthetic resin, synthetic resin processed paper, glass, pottery and the like. The lid is a molded product of the packaging material of the first invention, and the base is adhered to the opening of the container.

 One of the desirable modes of the container of the third invention is that the lid has a tongue piece. The tongue piece is a means for holding the lid with a fingertip when opening the lid, and may extend the entire layer of the lid (adhesive integrated layer between the base and the cover body), but may extend only the base. It is desirable to form it out. That is, since the base portion of the lid is adhered to the container body, the entire lid material can be opened simply by peeling the base from the container body. In addition, when the tongue piece is formed by extending the base, the tongue piece becomes more flexible than when the cover is formed by extending the entire layer. When the over-cap is fitted in such a manner, there is an advantage that the tongue piece is naturally bent and the over-cap can be fitted smoothly.

 Another desirable mode of the container of the third invention is that the cover of the lid has the second gas discharge hole at a position not overlapping with the gas discharge hole of the base. The effect of the second gas discharge hole is as described in the packaging material of the first invention.

In a preferred embodiment, the position of the second gas discharge hole is on the opposite side of the tongue piece. This “reverse side” means, for example, that the center of the lid is the origin Then, draw a straight line connecting this origin and the tongue piece, and then draw a perpendicular line perpendicular to this straight line and the origin, and assuming that the lid is divided into two regions by this perpendicular line. However, this means that the second gas discharge ¾ is located in the area where the tongue piece is not formed. In this way, by providing the second gas discharge hole on the side opposite to the tongue piece, even when high-temperature steam or the like blows out from the second gas discharge port, the tongue piece can be bare handed. It is possible to pinch.

 Yet another aspect of the container of the third invention is that a reclosing prevention piece is formed on the periphery of the gas discharge hole of the base.

 When the food or drink is heated by the container of the third invention, the base and the cover are separated, and steam or other excessive gas is ejected from the inside of the container through the gas discharge hole, thereby preventing damage to the container. . However, if the base and the cover come into close contact with each other after the heating is stopped and the container is closed, the inside of the container may be under pressure as the food or drink cools, and the container may be deformed. There is. The reclosing prevention section acts as a means for preventing such a cover body from re-adhering to the base.

 The reclosing prevention section may be formed, for example, by making a radial cut in the periphery of the gas discharge hole, or by forming the gas discharge hole into a star, gear, cross, etc. Can be. When food or beverage is heated by a container having such a reclosing prevention section, steam or other excessive gas from the inside of the container acts on the cover body through the gas discharge hole, and the pressure causes the cover body to move from the base. At this time, the reclosing prevention piece formed in the gas discharge hole by the hot gas is deformed and rises. Therefore, even if the cover body tries to adhere to the substrate again after the heating is completed, the upright reclosing prevention section prevents the cover body from adhering.

Alternatively, a similar effect can be obtained by forming one or two or more cutouts for preventing reclosing at locations other than the gas discharge holes of the base. This cut is shaped to form a reclosing prevention piece when opened. For example, radial, cross, X-shaped, γ-shaped, z-shaped, other, u, v,

Examples include W, M, N, H, S, Ω, ∑, and letter shape. By forming such a cut in the base, excessive gas such as steam is blown out from the cut in a range where the birch is peeled off, and the cut is deformed by heat and rises. After the end of the heating, the upright cuts prevent the cover from adhering to the base again. It should be noted that such a cut can be used in combination with the above-described embodiment in which a reclosing prevention piece is formed on the periphery of the gas discharge hole.

 Yet another embodiment of the container of the third invention is to provide a microwave shielding layer on a side surface of the container body. The microwave shielding layer is provided in a range where the upper surface of the food or beverage to be sealed covers a portion in contact with the container body.

 The microwave shielding layer is made of, for example, a thin metal foil such as an aluminum foil, a method of bonding the metal foil to a wall surface of the container body, a method of forming the container body in a multilayer shape including the metal foil, and a method of forming the container body integrally. It can be provided on the wall surface of the container body by, for example, a method of fitting the metal cap.

 By providing the microwave shielding layer, when the container is placed in a microwave oven and the food or drink is heated, the amount of microwaves applied to the upper surface of the food or drink that is most overheated can be reduced. As a result, bumping of the food or drink sealed in the container can be suppressed, and the accident that the food or drink spills out of the container during heating can be more reliably prevented. The fourth invention of this application is a container for sealing food and drink using the packaging material of the second invention. The container of the fourth invention has the same basic configuration as that of the container of the third invention, and includes a container main body made of a microwave-permeable material, and a lid fitted into an opening of the container main body. ing.

The lid is formed of the packaging material of the second invention, and an excess gas in the container body is discharged to the outside by a gas discharge path which is conducted to a part of the base and the cover body. Therefore, the other part does not peel off the base and the cover body, and there is little danger of the heated food or beverages spilling over. The popping noise during conduction of the gas discharge path is slight, and the overcap does not fly during heating even if the lid is covered with an overcap.

 Moreover, since the cover other than the gas discharge path is adhered to the base, there is no danger of leakage of food or beverage inside even when carrying the heated container by hand. Therefore, such a container of the fourth invention is suitable when the food or drink is a liquid food such as a soup or a drink.

 In the container of the fourth invention, it is preferable that the gas discharge path of the lid is formed from the gas discharge 71 to the lid edge. In this case, outgassing the substrate? Excess gas discharged from L passes through the gas discharge path and is discharged out of the container from the lid rim.

 Another desirable mode of the container of the fourth invention is that the cover of the lid has a second gas discharge hole at a position that does not overlap with the position of the gas discharge of the base. The function and effect of the second gas discharge hole are as described in the packaging material of the second invention.

 In still another preferred embodiment of the container according to the fourth invention, the gas discharge path of the lid is provided so that the base and the canopy are in a range of 50 to 800 gf / 15 mm at room temperature, preferably 100 to 400 gf / 15 mm. It is formed by bonding with adhesive strength. Further, the adhesive strength between the base and the cover in the gas discharge path is preferably in the range of 5 to 80% of the adhesive strength in other parts. By making the adhesive strength between the base of the gas discharge path and the cover unit weaker than the adhesive strength of the other parts, the force of the gas discharge path part due to the gas pressure acting on the cover body through the gas discharge hole from inside the container body Only the bar body is peeled off, and the other part of the cover body remains adhered to the substrate.

Note that the number of gas discharge paths is not limited to one, and a plurality of gas discharge paths may be formed for one gas discharge hole. In this case, the container must be Since the inside and outside of the container conduct, the excess gas can be more reliably discharged to the outside of the container. In addition, it goes without saying that the number of gas discharge holes is not limited to one, and a plurality of gas discharge holes may be formed.

 Still another aspect of the container according to the fourth invention is that a reclosing prevention piece is formed on the periphery of the gas discharge hole. Still another aspect is that the base is located at a position other than the gas discharge hole. It has a cut for preventing reclosing. These specific configurations and operations are as described in the container of the third invention.

 Still another embodiment of the container of the fourth invention is to provide a microwave shielding layer on a side surface of the container body. The configuration and operation of this microphone mouth wave shielding layer are as described for the container of the third invention. The container of the third invention and the fourth invention or the packaging bag using the packaging material of the first invention and the second invention described above, when the food or beverage sealed by them is heated by electronic range, It can be placed in a microwave and heated without any pretreatment. Therefore, it is particularly excellent for use as a container or a packaging bag for a vending machine that sells foods and drinks such as soups, curries, snacks, oden, limestones, etc. by heating them in a microwave oven. Example

 Next, each invention of this application will be described in more detail and specifically with reference to examples, but these inventions are not limited to the following examples. Implementation 伢 1

FIGS. 1 and 2 are a front view and a rear view of a container lid showing an embodiment of the packaging material of the first invention, respectively. FIGS. 3 and 4 are X-sections of FIG. 1, respectively. It is X 'sectional drawing and YY' sectional drawing. Fig. 5 shows the container sealed with this lid. It is sectional drawing of a container.

 The lid (B) formed by the packaging material of the first invention is a polyethylene (II) phthalate (PET) having a thickness of 42; um, a base (1), and a 12 / vm-thick PET layer (2a). And a paper layer (2b) having a thickness of 90 m. The base (1) and the cover (2) have an adhesive strength at room temperature (20 ° C) of 250gf / 15mm. With a polyethylene adhesive.

 One end of the lid (B) is provided with a tongue piece (4) for clamping, and two gas exhaust holes (5) are provided at the end (the other end side) almost opposite to the tongue piece (4). This gas discharge hole (5) is formed and completely covered with a cover (2).

 After filling the food and drink, the lid (B) is bonded to the flange (7) of the container body (A: see Fig. 5) at room temperature (20 ° C) with a polypropylene adhesive (6). Bonded with a strength of 1,000gf / 15mm.

 When heating food or drink filled in a container (C: see Fig. 5) with a microwave, the container (C) is heated in a microwave as it is without opening part or all of the lid (B). Water vapor is generated from the food and drink by heating, and the pressure inside the container body (A) increases. However, since the water vapor pushes up the cover body (2) through the gas discharge hole (5), the gas discharge hole (5). Since the cover (2) peels off around the container, excess gas is discharged to the outside and the pressure inside the container (C) decreases, so that heating can be continued with the lid (B) attached. is there. On the tongue piece (4) side of the other end of the gas discharge hole (5), the cover body (2) maintains a state of being adhered to the base (1).

After the heating is completed, the container (C) is taken out of the microwave oven, the tongue piece (4) is pulled by a finger in the peeling direction, and the lid (B) can be removed from the container body (A). In this removal, since the tongue piece (4) is located away from the gas discharge hole (5), the tongue piece (4) is heated by the water vapor discharged from the gas discharge hole (5). The lid (B) can be easily removed. Example 2

 FIG. 6 is an external view showing an embodiment of the packaging material of the first invention, and FIG. 6 is a partially enlarged cross-sectional view taken along the line ZZ ′ in FIG.

 The packaging bag (D) formed with the packaging material of the first invention is a 30 m thick base (1) made of polypropylene, and a thickness of aluminum foil (2a) of um and a thickness of 40 m. The base (1) and the cover (2) have an adhesive strength of 500gf / 15mm at room temperature (20 ° C) and are made of polyethylene. It is re-adhered with an adhesive. Gas exhaust holes (5) are formed in the base (1) at six places, and these gas exhaust holes are formed. L (5) is covered with a cover body (2) and is completely closed.

 This packaging material is bent and formed into a bag shape, the horizontal seal (10) and the vertical seal (12) are bonded, and gas is generated during storage from the open horizontal seal (11). The food and drink were filled, and finally the horizontal seal (11) was bonded to create a packaging bag (D). The seals (10), (11), and (12) were bonded to each other with a bonding strength of 2,000 gf / 15 mm at normal temperature (20 ° C) using a polypropylene adhesive (6). When storage is started in this state, excess gas is generated from the food and drink in the packaging bag (D), and the pressure increases. This excess gas is supplied to the cover body (2) through the gas discharge hole (5). ), The cover (2) from the gas discharge hole (5) to the horizontal seals (10, 11) and vertical seals (12) peels off, and excess gas is released from the packaging bag (D). It is discharged out of the container and the pressure in the packaging bag (D) decreases, so that it is possible to continue storage. Example 3

 FIG. 8 is an external perspective view showing an embodiment of the container of the third invention, and FIG. 9 is a partially enlarged sectional view taken along line VV ′ in FIG.

In FIG. 8, after the lid (B) is filled with food and beverage, the lid (B) of the container body (A) (F) with an adhesive strength of 1,000 gf / 15 mm at room temperature (20 ° C). The lid (B) is composed of a base (1) and a cover (2) as in the case of the packaging material exemplified in Example 1. The base (1) and the cover (2) are connected at room temperature (20 ° C.). Although tongue for clamping in one end of ° C) in the adhesive strength 250 gf / 15 mm in Poryechiren system _c lid by being re adhered to the adhesive of (B) (4) is provided, the tongue The part (4) is formed by extending the base (1). The lid (B) has the same circular shape as the flange (F) of the container body (A).

 A gas outlet 排 (5) is formed in the base body (1) at a position (the other end side) substantially opposite to the tongue piece (4), and a second gas outlet hole is provided near the base. (8) is formed in the force bar body (2).

 When the container (C) filled with food and drink is placed in a microwave oven and heated, the pressure inside the container (C) increases, and excess gas pushes up the cover (2) through the gas discharge hole (5). Then, the cover body (2) peels off from the base body (1). When this separation reaches the second gas discharge hole (8), the inside and outside of the container (C) conducts through the second gas discharge hole (8), and excess gas is discharged and the container (C) is discharged. C) The pressure inside decreases.

 Further, since the tongue piece (4) is merely an extension of the base (1), it is soft and can be easily bent. FIG. 10 is an external perspective view showing the operation of the tongue piece. In FIG. 10, the container body (A) is fitted with an overcap (E) for protecting the lid (B), but since the tongue piece (4) is soft, the overcap is attached. The operation of fitting the tip (E) can be performed smoothly. Example 4

 FIG. 11 is an external view of a packaging bag showing another embodiment of the packaging material of the first invention, and FIG. 12 is a partially enlarged sectional view taken along line WW ′ of FIG.

In FIG. 11, the packaging bag (F) is made of the same material and structure as the packaging bag (D) shown in the second embodiment (see FIG. 6). The packaging bag (F) is As shown in the figure, a gas discharge hole (5) is formed in a base (1), and the gas discharge hole (5) is covered with a cover body (2) and is completely closed.

 Further, a second gas discharge hole (8) is formed in the cover (2) of the packaging bag (F) in the vicinity of the gas discharge hole (5).

 In such a packaging bag (F), if excessive pressure is generated in the packaging bag (F) due to heating, fermentation, etc., and the pressure increases, the gas adheres through the gas discharge hole (5). Since the weak cover (2) is pushed up, the cover (2) peels around the gas discharge ¾ (5). Then, when the separation reaches the second gas discharge hole (8), the inside and outside of the packaging bag (F) conduct, and the pressure of the packaging bag (F) decreases, so that the packaging bag (F) No undesired phenomena such as rupture of the material occur.

 Thus, in the packaging bag (F) shown in the fourth embodiment, it is not necessary to peel the cover (2) up to the adhesive portions such as the horizontal seal portions (10, 11) and the vertical seal portions (12). The excess gas can be discharged by peeling off to the second gas discharge hole (8) formed in the vicinity of the gas discharge hole (5), so that the packaging bag (F) can be more reliably ruptured. And other undesirable phenomena can be prevented. Example 5

 FIG. 13 and FIG. 14 are a front view and a rear view, respectively, of the lid of the container showing one embodiment of the packaging material of the second invention. FIGS. 15 and 16 are X-sections of FIG. FIG. 3 is a partially enlarged cross-sectional view taken along line X ′ and line YY ′. FIG. 17 is a partial cross-sectional view of the container sealed with the lid.

The lid (B) formed by the packaging material of the second invention is made of polyethylene terephthalate (PET) having a thickness of 42 ^ m (1) and a PET layer (2a ) And a paper layer (2b) having a thickness. A tongue piece (4) for holding is provided at one end of the base (1), and a gas discharge hole (5) is provided at an end (the other end side) substantially opposite to the tongue piece (4). Formed individually, this The gas discharge hole (5) is covered with a cover (2) and is completely closed. In addition, a gas discharge path (9) is formed in the lid (B) from the gas discharge ¾ (5) to the lid rim.

 The base (1) and the cover (2) are bonded together with a polyethylene-based adhesive with an adhesive strength of 1,000 gf / 15 mm at room temperature (20 ° C), excluding the gas discharge path (9). I have. The gas discharge path (9) is bonded to the other substrate (1) with 100gf / 15mm, which is 10% of the bonding strength of the cover (2). After filling the food and drink, the lid (B) is bonded to the flange (7) of the container body (A: see Fig. 17) at room temperature (20 ° C) with a polypropylene adhesive (6). Bonded at a strength of 1,500gf / 15mm.

 When heating the food or beverage filled in the container (C: see Fig. 17) with a microwave, the container (C) is heated with an electronic range without opening part or all of the lid (B). . Water vapor is generated from the food and drink due to the heating, and the pressure inside the container body (A) increases, but the water vapor is passed through the gas discharge hole (5), and the cover (2) in the gas discharge path (9) with weak adhesive strength ) Up, gas out? The air discharge path (9) conducts between L (5) and the lid edge. As a result, excess gas is discharged to the outside and the pressure in the container (C) drops, so even if heating is continued with the lid (B) closed, there is a risk that the container (C) will burst. There is no. On the side of the tongue piece (4) at the other end of the hole (5), the cover body (2) maintains a state of being bonded to the base (1).

 After the heating is completed, the container (C) is taken out of the microwave oven, the tongue piece (4) is pulled by a finger in the peeling direction, and the lid (B) can be removed from the container body (A). In this removal, the tongue piece (4) is located away from the gas discharge hole (5), and the water vapor discharged from the gas discharge hole (5) heats the tongue piece (4). The lid (B) can be easily removed.

As described above, in the case of the container (C) illustrated in FIG. 17, the cover (2) in only the gas discharge path (9) is peeled off, and the inside and outside of the container (C) are electrically connected. There is little danger of food and beverages spilling over, and the area where the cover (2) peels off from the substrate (1) is narrow, so that no loud noise is generated at the time of peeling. Further, since the cover (2) is separated from the substrate (1) in a narrow range, even when the cover (B) is covered with the overcap, the overcap does not fly during heating. Example 6

 FIG. 18 is an external view showing another embodiment of the packaging material of the second invention, and FIG. 19 is a partially enlarged cross-sectional view taken along line ZZ 'of FIG.

 The packaging bag (D) formed by the packaging material of the second invention is a 30 m thick base (1) made of polypropylene, a 7 m thick aluminum foil (2a) and a 40 Aim thick It is composed of a birch (2) laminated with polypropylene (2b). Gas exhaust holes (5) are formed in the base (1) at six places, and these gas exhaust holes (5) are covered with a cover body (2) and completely closed. Further, a gas discharge path (9) is formed from the gas discharge hole (5) of the base (1) to the end of the packaging material in the vicinity thereof.

 The base (1) and the force bar (2) are bonded together with a polyethylene-based adhesive (3) with a bonding strength of 1,000 gf / 15mm at room temperature (20 ° C) except for the gas discharge path (9). Have been. The gas discharge path (9) is bonded with 100gf / 15mm, which is 10% of the bonding strength between the other substrate (1) and the cover (2).

This packaging material is bent and formed into a bag shape, the horizontal seal (10) and the vertical seal (12) are bonded, and the food and beverage is filled through the open horizontal seal (11). The package (D) was prepared by bonding the horizontal seal (11) to the package. The gas discharge path (9) is designed to be electrically connected to the outside at each of the seal portions (10), (11) and (12). The seals (10), (11) and (12) are bonded to each other with a polypropylene adhesive (6) at an adhesive strength of 1,500 gf / 15 mm at room temperature (20 ° C). did. When the packaging bag (D) is set in a microwave oven and the food and drink inside is heated to generate steam in the packaging bag (D) and the pressure increases, excess gas is discharged through the gas discharge hole (5). The cover (2) at the part of the gas discharge path (9) with low adhesive strength is pushed up, and the gas discharge path (9) becomes conductive. As a result, the excess gas in the packing bag (D) is discharged from the gas discharging hole (5) through the gas discharging path (9) to the outside of the packing bag (D), and is discharged from the packing bag (D). Since the pressure drops, undesired phenomena such as bursting of the packaging bag (D) do not occur even if heating is continued. Example

 FIG. 20 is an external perspective view showing one embodiment of the container of the fourth invention, and FIG. 21 is a partially enlarged sectional view taken along line VV ′ of FIG.

 In FIG. 20, the lid (B) is bonded to the flange (F) of the container body (A) at a normal temperature (20 ° C) with an adhesive strength of 1,500 gf / 15 mm after the food or beverage is filled. .

 The lid (B) is composed of a base (1) and a cover (2), like the packaging material exemplified in the fifth embodiment. A tongue piece (4) for clamping is provided at one end of the lid (B), and the tongue piece (4) is formed by extending the base (1). The birch (2) has the same circular shape as the flange (7) of the container body (A).

 A gas discharge hole (5) is formed in the base (1) at a position (the other end side) substantially opposite to the tongue piece (4), and a second gas discharge hole is provided in the vicinity thereof. (8) is formed on the cover body (2). A gas discharge path (9) is formed between the gas discharge hole (5) and the second gas discharge hole (8).

The base body (1) and the cover body (2) are bonded to each other by a polyethylene adhesive at a bonding strength of 1,000 gf / 15 mm at normal temperature (20 ° C.) at a portion other than the gas discharge path (9). The gas discharge path (9) is bonded with an adhesive strength of 100gf / 15mm. ing.

 When the container (c) filled with food and drink is placed in a microwave oven and heated, the pressure in the container (C) increases, and excess gas pushes up the cover (2) through the gas discharge hole (5). However, the cover body (2) at the gas discharge path (9) with weak adhesive strength peels off. When this separation reaches the second gas discharge hole (8), the inside and outside of the container (C) conducts through the second gas discharge hole (8), and excess gas is discharged and the container (C) is discharged. C) The pressure inside decreases.

 As described above, when the cover body (2) of the gas discharge path (9) separates from the base (1), excess gas can be discharged by separating the cover body to the second gas discharge hole (8). Therefore, the pressure in the container (C) can be reduced more reliably.

 Also, since the tongue piece (4) is only the extension of the base (1), it is softer and easier to bend than the one in which the entire layer of the lid (B) is extended. . For this reason, when the container body (A) is fitted with an overcap (not shown) for protecting the lid (B), the tongue piece (4) is easily bent and the overcap is fitted. The operation can be performed smoothly. Implementation 伢 8

 FIG. 22 is an external view of a packaging bag showing another embodiment of the packaging material of the second invention.

 In FIG. 22, the packaging bag (F) is made of the same material and structure as the packaging bag (D) shown in the sixth embodiment (see FIGS. 18 and 19). Further, in the packaging bag (F), a gas exhaust hole (5) is formed in the base (1), and the gas exhaust hole (5) is covered with the cover body (2), as in the case of the sixth embodiment. Has been completely closed off. The packaging bag (F) has a gas discharge path (9) as in the sixth embodiment.

Further, the cover (2) of the packaging bag (F) has a gas discharge hole (5). A second gas discharge hole (8) is formed in the proximity position, and a gas discharge path (9) is formed between the gas discharge hole (5) and the second gas discharge hole (8). .

 In the case of such a packaging bag (F), when steam is generated in the packaging bag (F) due to heating and the pressure increases, the steam passes through the gas discharge hole (5) and the cover body having a weak adhesive strength. Since (2) is pushed up, the cover (2) in the gas discharge path (9) is peeled off from the surroundings of the gas discharge hole (5). When the separation reaches the second gas discharge hole (8), the inside and outside of the packaging bag (F) conducts, and the pressure of the packaging bag (F) decreases, so that the packaging bag (F) is ruptured. Undesirable phenomena such as do not occur.

 Thus, in the packaging bag (F) shown in Example 8, it is not necessary to peel off the cover (2) up to the adhesive portions such as the horizontal seal portions (10, 11) and the vertical seal portions (12). The excess gas can be discharged by peeling off to the second gas discharge hole (8) formed in the vicinity of the gas discharge hole (5), so that the packaging bag (F) can be more reliably ruptured. And other undesirable phenomena can be prevented. Example 9

 FIGS. 23 and 24 are rear views of the lid used for the container of the fourth invention.

 In the lid (B) shown in FIG. 23, four cuts (13a to 13d) are provided in the periphery of the gas discharge hole (5) of the base (1). In the lid (B) shown in FIG. 24, four cuts (13e to 13h) are provided in the periphery of the gas discharge hole (5), and the whole is formed in a substantially cross shape. . In the case of any of the lids (B), these cuts form four pieces (13) for preventing reclosing at the periphery of the gas discharge hole (5).

The reclosing prevention section (13) is normally adhered to a cover (not shown), but the heating causes excessive gas to be generated from the food and drink in the container, and the gas discharge path ( 9) When the cover part of the part peels off and steam is blown out from the gas exhaust hole (5), 4 The reclosing prevention sections (13) are heated and deformed by the gas ejection pressure, and remain upright. Then, after the heating is completed, the reclosing prevention section (13) prevents the cover body from coming into close contact with the base (1) again, so that the gas discharge ¾ (5) is closed and the pressure inside the container is reduced. This prevents the container from being deformed.

 Such a reclosing prevention section (13) may be provided on the lid of the container of the third invention as exemplified in the first and third embodiments. Example 10

 FIG. 25 is a rear view showing another embodiment of the lid used for the container of the fourth invention.

 In the lid (B) shown in FIG. 25, a plurality of X-shaped reclosing prevention cuts (14) are formed around the gas discharge holes (5) of the base (1).

 This gap (14) is normally covered with the cover in a normal state, but the heating causes excessive gas to be generated from the food and drink in the container, and the cover in the gas discharge path (9) is peeled off, and Steam is also ejected from the four reclosing prevention cuts (14), and the cutting edge is heated, deformed by the gas ejection pressure, and remains upright. After the heating is completed, the gas discharge hole (5) is closed to prevent the cover body from coming into close contact with the base body (1) again by the reclosing prevention cut (14), so that the inside of the container is under pressure. This can prevent the container from being deformed.

 FIG. 25 shows an embodiment in which the cut (14) is formed only in the area of the gas discharge path (9), but the cut (14) is formed on the entire surface of the base (1). It is also possible. That is, the area other than the gas discharge path (9) is covered.

—Because the body is not exfoliated, it is easier to process and form the cuts (14) in advance by forming the cuts (14) on the entire surface of the substrate (1) regardless of the presence or absence of the cuts (14). In the case where a cut (14) is formed on the entire surface of the substrate (1),

It can also be used as a lid of the container of the third invention as shown in 1 and 4. Example 11

 FIG. 26 is an external perspective view showing still another embodiment of the lid used for the container of the fourth invention, and FIG. 27 is a partially enlarged cross-sectional view taken along line U-U ′ of FIG.

 26 and 27, the lid (B) is made of the same material and structure as the lid (B) shown in FIGS. 13 to 17.

 Substrate discharge holes (5) are provided substantially at the center of the base (1) of the lid (B), and a cover (2) is adhered to the entire surface of the base (5). The cover (2) is provided with a plurality of second gas discharge holes (8), and a range connecting the gas discharge holes (5) and the second gas discharge holes (8) is provided. A gas discharge path (9) is formed.

 The base body (1) and the cover body (2) are bonded at a normal temperature (20 ° C.) with an adhesive strength of 1,000 gf / 15 mm, but only in the range of the gas discharge path (9), the adhesive strength is 100 gf / 15 mm. It is glued.

 The lid (B) is adhered to the flange (F) of the container body (A) filled with food and drink (L in Fig. 27) at an ordinary temperature (20 ° C) with an adhesive strength of 1,500 gf / 15 mm. A step (15) is formed below the flange (7) of the container body (A). If this container (C) is directly heated in a microwave oven, steam will be generated from the food and drink, and the pressure inside the container (C) will increase, but the cover (2) in the gas discharge path (9) will be overexposed. The gas discharge hole (5) and the second gas discharge hole (8), and the excess gas in the container (C) is discharged and the pressure drops. No undesirable phenomena occur.

 In particular, in this embodiment, the presence of a plurality of second gas discharge holes (8) ensures that the gas discharge path (9) is conducted more reliably.

In the container (C), a step (15) is formed in the container body (A), and an aluminum foil layer (16) for blocking microwaves is formed in the step (15). Have been. The aluminum foil layer (16) is disposed so as to cover a portion (L2) where the upper surface (L1) of the food and drink (L) filled in the container body (A) and the container body (A) are in contact. Generally, when food or beverage is heated in a container, microwaves tend to concentrate on the upper surface of the food or beverage. In this container (C), the aluminum foil layer (16) is formed by the upper surface of the food or beverage. Since the (L1) and the container body (A) are arranged so as to cover the place (L2) where they come into contact with each other, the amount of microwave irradiation on the upper surface (L1) can be reduced. For this reason, overheating of the upper surface (L1) of the food or drink is prevented, and it is possible to prevent the food or drink (L) from being locally heated and bumping or spilling. The container (C) can prevent the food and drink (L) from spilling out by the action of the gas discharge path (9) and the second gas discharge hole (8). However, the effect of the prevention is further improved.

 Further, in this container (C), a heat insulating layer (17) is provided outside the aluminum foil layer (16) to hold the container body (A) safely even when the food and drink (L) becomes hot. And a polyester coating layer (18). The heated container (C) can be transported safely by gripping the heat insulating layer (17).

 The aluminum foil layer (16), the heat insulating layer (17) and the coating layer (18) of the container (C) shown in this embodiment are applied to the container of the third invention shown in the first and third embodiments. You may. In particular, prevention of spillage by the aluminum foil layer (16) is effective in the container of the third invention in which the cover body is widely separated. Industrial availability

 The packaging material of this application includes a lid for sealing a container filled with food or drink to be ingested by heating with a microwave oven or the like, or a packaging bag formed into a bag shape, a tube shape, or the like for packaging food or drink. Can be used.

The sealed food and beverage container of this application is heated by a microwave oven or the like and ingested. It is a container for food and beverages. There is no need to open or pierce before heating, and there is very little danger of spills due to heating. For this reason, it has particularly excellent applicability as a container for a vending machine provided with a heating means. Such sales of food and beverages by vending machines can help reduce labor costs, save labor, reduce store space, etc., and contribute to establishing new sales channels for food and beverages.

Claims

The scope of the claims 1. A packaging material having a base made of a non-breathable material having a gas discharge hole, and a non-breathable cover body that covers the gas discharge hole and is adhered to one surface of the base material. Characterized in that it is adhered to the substrate with an adhesive strength that is peeled off when excess gas pressure generated from the food or beverage packaged with the packaging material acts on the force bar through the gas discharge hole. Packaging material. 2. The packaging material according to claim 1, wherein the adhesive strength between the base and the cover is 100 to 1,650 gf / 15 mm. 3. The packaging material according to claim 1, wherein the cover body has a second gas discharge hole, and the second gas discharge hole is formed at a position not overlapping with the gas discharge hole of the base. 4. Non-breathable material substrate with gas exhaust holes and gas exhaust? A non-breathable cover body coated with L and adhered to one surface of the substrate, wherein a part of the cover body is formed of excess gas generated from food or beverage packaged with the packaging material. Pressure is applied to the cover body through the gas discharge hole, and is adhered to the base with an adhesive strength that is peeled off, and the separated cover body portion is a gas discharge that communicates between the gas discharge hole and the outside of the packaging material. A packaging material characterized by forming a path. 5. The packaging material according to claim 4, wherein the gas discharge path is formed by bonding the base and the cover with an adhesive strength of 50 to 800 gf / 15 mm. 6. The gas exhaust path is formed by bonding the base and the cover with an adhesive strength of 5 to 80% of the adhesive strength at a portion other than the gas exhaust path. The packaging material of claim 4 or claim 5. 7. The cover body has a second gas discharge hole at a position not overlapping with the gas discharge hole of the base, and a gas discharge path is formed between the gas discharge hole and the second gas discharge hole. The packaging material according to any one of claims 4 to 6, wherein: 8. A container having a microwave-permeable container main body and a lid for sealing the container main body, wherein the lid covers a non-permeable material base having a gas exhaust hole, and covers the gas exhaust hole. A non-breathable cover body adhered to the upper surface of the base body, wherein the cover body is configured such that excess gas pressure generated from food or drink in the container body acts on the cover body through the gas discharge hole. A food and beverage sealing container characterized by being adhered to a substrate with an adhesive strength peeled off by the adhesive. 9. The container according to claim 8, wherein the adhesive strength between the base and the cover is 100 to 1,650 gf / 15 mm. 10. The container according to claim 8, wherein the cover has a second gas discharge hole, and the second gas discharge hole is formed at a position not overlapping with the gas discharge hole of the base. 1 1. The container according to claim 8, wherein the lid has a tongue piece. 12. The container according to claim 11, wherein the tongue piece is formed by extending the base. 13. The container according to claim 10, wherein the second gas discharge hole is formed at a position opposite to the tongue piece. 14. The container according to any one of claims 8 to 13, wherein the gas discharge hole of the base has a reclosing prevention piece at the periphery of the hole. 1 5. The container according to any one of claims 8 to 14, wherein the base has one or more reclosing prevention cuts at locations other than the gas discharge holes. 16. The container body has a microwave shielding layer on a side surface portion, and the microwave shielding layer is disposed so as to cover a portion where an upper surface of the food or beverage to be sealed contacts the container body. From 1 to 5 containers. 17. A container having a microwave permeable container main body and a lid for sealing the container main body, wherein the lid is made of a non-permeable material having a gas exhaust hole, and a substrate covering the gas exhaust hole. A non-breathable cover body adhered to the upper surface of the container, and a part of the cover body. Excessive gas pressure generated from food or drink in the container body acts on the cover body through the gas discharge hole. The cover is peeled off with a bonding strength, and the peeled cover portion forms a gas discharge path that connects the gas discharge hole to the outside of the lid. Container. 18. The container according to claim 17, wherein the gas discharge path is formed from the gas discharge hole to the lid rim. 1 9. The cover body has a second gas discharge hole at a position not overlapping with the gas discharge hole of the base, and a gas discharge path is formed between the gas discharge hole and the second gas discharge hole. 18. The container of claim 17, wherein 20. The gas exhaust path connects the base and the cover with an adhesive strength of 50 to 800 gf / 15 mm. The container according to any one of claims 17 to 19, which is formed by attaching. 21. The gas discharge path according to claim 17, wherein the gas discharge path is formed by bonding the base and the cover with an adhesive strength of 5 to 80% of the bond strength at a portion other than the gas discharge path. Any container. 22. The container according to any one of claims 17 to 21, wherein the lid has a tongue piece. 23. The container of claim 22, wherein the tongue piece is formed by extending the base. 24. The container according to claim 22 or 23, wherein the tongue piece is formed at a position opposite to the end of the gas discharge path. 25. The container according to any one of claims 17 to 24, wherein the gas exhaust hole of the base has a reclosing prevention piece on the periphery of the hole. 26. The container according to any one of claims 17 to 25, wherein the substrate has one or more reclosing prevention cuts at locations other than the gas discharge holes. 27. The container body has a microwave shielding layer on the side surface, and the microwave shielding layer is disposed so as to cover a portion where the upper surface of the food or beverage to be sealed contacts the container body. One of 26 containers.