KR100989502B1 - A package - Google Patents

Abstract

The present invention relates to the application of a flexible or diffusing film to form an openable sealing means of a packaging container. In particular, the present invention relates to the application of a flexible or diffusive film to form a releasable sealing means of a food container for the purpose of being heated in a microwave oven. The present invention is a simpler and more convenient solution for storing food in a packaging container capable of heating food without having to perforate the packaging container prior to heating.

Packaging Containers, Diffuse Strips, Sealed Ends, Weakened Areas

Description

Packaging container {A PACKAGE}

1 is a top view of a centrally sealed flexible pouch of the present invention in accordance with a preferred embodiment of the present invention showing a diffusible strip of pouches.

Figure 2 is a cross sectional view of the central sealing pouch of the present invention in accordance with a preferred embodiment of the present invention showing the layers of the body and the diffusing strip.

3 is a perspective view of a centrally sealed flexible pouch of the present invention in accordance with a preferred embodiment of the present invention showing the diffusing strip and weakened region of the pouch.

4 is a perspective view of a centrally sealed flexible pouch of the present invention in accordance with a preferred embodiment of the present invention showing the diffusing strip and rupture area of the pouch.

Fig. 5 is a perspective view of a three side sealing pouch showing the sealing of the sheets forming the three side sealing pouch and also showing the absence of the third layer of the present invention in accordance with a preferred embodiment of the present invention.

Figure 6 is a perspective view of a three side sealed pouch of the present invention in accordance with a preferred embodiment of the present invention.

Figure 7 is a cross sectional view of the pouch at a sealed edge showing the weakened area of the pouch of the present invention in accordance with a preferred embodiment of the present invention.

Fig. 8 is a cross sectional view of the pouch at the sealed edge showing the weakened area of the pouch without the third layer of the present invention in accordance with a preferred embodiment of the present invention.

Figure 9 is a perspective view of a gusset pouch with a diffusing strip of the present invention in accordance with a preferred embodiment of the present invention.

10 is a perspective view of an upright pouch of the present invention in accordance with a preferred embodiment of the present invention having a diffusing strip.

11 is a perspective view of an upper sealed container of the present invention in accordance with a preferred embodiment of the present invention.

Figure 12 is a perspective view of a central sealing pouch having a sheet of one or more diffusive strips of the present invention in accordance with a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: pouch

120: main body

130: diffuse strip

140: weakened area

150: sealed end

200: top sealed food container

The present invention relates to a packaging container, and in particular, the invention relates to a packaging container for food storage for the purpose of being heated by microwaves.

Instant cooked food for the purpose of being reheated using microwave ovens continues to be popular. The food is first cooked by the manufacturer and then placed in a packaging container, and then frozen or packaged for freshness and handled for distribution and sale.

While heating the food, the moisture of the food is rapidly heated and converted to steam. As the temperature of the packaging container increases during heating, the pressure in the packaging container increases due to the expansion of the water molecules. This sometimes causes rupture of the packaging container, scattering of food in the microwave oven, or rupture upon opening the packaging container, and the like.

To prevent this phenomenon, consumers generally drill holes in the packaging container to allow steam to escape from the container during heating. However, sometimes the perforated holes are excessively large or too large in dimensions, causing too much vapor to escape through the holes during heating, causing the food to dry after heating. On the other hand, the perforated holes may be excessively small or too small so that a large amount of steam is still trapped, resulting in food scattering when the packaging container is opened or the packaging container ruptures. Neither method is easy to make the packaged food tasteless.

It is therefore an object of the present invention to provide a packaging container capable of heating the food without the need for perforating the packaging container prior to heating, which also causes the food to dry during heating.

The prior arts to overcome this problem are discussed.                         

US Pat. No. 4,461,420 to Hobarth Lasszlo S. discloses a breathable packaging container cover for a packaging container consisting of a valve film fused to an inner surface of a capping film of the packaging container. The valve is only exposed when the capping film is torn along a predetermined tear line. The valve film passes water vapor but not water.

Lead m. Peter and Smith B. John's International Publication No. 99-59897 discloses a food container, which also relates to a film for sealing food and food containers, and to a method of making food containers. The seal or film for sealing the food container of the present invention is composed of two layers, a continuous layer and a perforated layer. These two layers are located in close proximity and are joined together by adhesive or thermal bonding. The perforated layer has a diameter of 1 to 10 mm and consists of 2% to 50% of perforations that are placed 1 to 10 mm apart. When food is cooked, the tie layer is peeled from the perforated layer to expose the perforated layer.

Mr. Griffin. John's British Patent No. 2,213,689 discloses a microwave vessel with a splash protection device or cover that allows the release of steam from the stored food during cooking or reheating. The cover of this particular invention has holes extending over a large area of the cover to allow the release of steam.

Tang, Ruen and Singh's PCT / NZ98 / 00195 discloses food, beverage or beverage bags, packaging containers or packaging materials that can be easily torn without the need for scissors. The envelope is multilayered, with the inner layer having at least one weakening line, with the outer layer substantially intact along the weakening line, so that the envelope can be torn along the weakening line, the weakening line being the first of the envelope. Extend from the edge to the opposite edge. The weakening line may be a perforation line, a point-and-line perforation, or any break in the inner layer that substantially separates the two parts of both sides of the weakening line. Alternatively, the weakening line may be an area thinner or weaker than other parts of the inner layer. To facilitate the onset of tearing, small openings, crevices, nicks, notches, etc. are located along the first edge of the envelope.

PCT / NZ00 / 00180 from Tang, Ruen and Singh discloses packaging containers and releasable sealing means for packaging. The openable sealing means for the present invention preferably consists of three layers, the first layer being a continuous layer with weakening lines (eg, perforation lines, reduced dimension lines, or cutouts), and a second layer. The layer consists of perforations, and the optional third layer covers the first layer and also consists of a weakening line. The first and third layers are removed along the weakening line prior to heating the food to expose the perforations to allow vapor to escape from the food.

For the purposes of this patent application, the term "packaging container" as used throughout this specification includes all kinds of food containers, such as pouches, packaging containers, and all related containers falling within the scope of the claims. It should be understood that use of the term does not limit the scope of the claims to any shape or embodiment of the packaging container related to the present invention.

Accordingly, the present invention relates to a packaging container having a flexible or diffusible film forming an openable sealing means. In particular, the present invention relates to a packaging container having a flexible or diffusible film for forming a releasable sealing means for storing food for the purpose of being heated in a microwave oven. The present invention is a simpler and more convenient solution for storing food in a packaging container capable of heating cooked food without having to perforate the packaging container prior to heating.

While heating the cooked and packaged food, the fusion point is automatically ruptured so that the diffusing strip of the packaging container is sealed or fused to the packaging container in a manner that allows the expanded steam to be discharged without dispersing the food. This simplified approach ensures that the moisture intended to be contained within the container is maintained, so that the packaged food does not become dry or tasteless. Thus, and unlike conventional patents, consumers do not need to peel off any layers from the packaging container or perforate the packaging container at any stage. Another major advantage in producing laminated films for such packaging containers is the simplicity of not having to consider the amount of perforation required for complete reheating to make the cooked food delicious.

Embodiments of the present invention will appear more clearly in the following description with reference to the accompanying drawings.

1 shows a top view of a central sealed pouch 100 which is a form of preferred embodiment of the present invention. Another embodiment of the present invention is shown in FIG. 11, which shows a perspective view of the top sealed container 200. Both forms of the invention consist of a multilayer body 120 and a multilayer diffuser strip 130.

Referring to FIG. 1 of the present invention, the pouch 100 seals the diffusing strip 130 between two sheets of the main body 120 to form one connected sheet, and then accommodates the cooked food therein. It is manufactured by sealing at parallel edges or sides to form a sealed end 150. The sealing of the edges will be described in detail.

2 illustrates how sealing is accomplished at parallel edges or sides to provide a sealing end 150. The parallel edges or sides indicated by the arrows are sealed together in the direction of the arrow to provide a sealed end 150. Figure 5 illustrates another sealing method of attaching the sheets together to form a three side sealing pouch (Figure 6). In this figure, it can be clearly seen that there are two separate sheets-a top sheet consisting of a multilayer body 120 and a multi-layer diffuser strip 130 and a bottom sheet consisting only of the body 120-these two sheets being cooked food. It is sealed at parallel ends or sides indicated by arrows so that it is received. The edge is sealed in the direction of the arrow to form the sealed end 150. It should be appreciated that the lower body 120 of this schematic diagram is inverted compared to the upper body 120. The sealing of the edges forming the sealing end 150 is performed by heat sealing, RF, ultrasonic, or similar fusion.

2 also shows a cross section of the food pouch 100. Both the main body 120 and the diffusing strip 130 of the present invention consist of a first layer 121, 131, a second layer 122, 132, and possibly a third layer 123, 133. However, in a broad sense, the main body 120 and the diffusing strip 130 may be formed of the first layers 121 and 131 and the second layer 122 with the third layers 123 and 133 absent (FIG. 5). 132 or may consist of three or more layers. In this configuration, substantially all of the features described herein are made with respect to the first layers 121, 131 and the second layers 122, 132 with the third layers 123, 133 present.

2, the outermost part of the main body 120, that is, the first layer 121, the second layer 122, and the innermost part, the third layer 123, is polyethylene and its derivatives, polyester and its derivatives, and polypropylene. And derivatives thereof, nylon and derivatives thereof, or any material suitable for heating in a microwave oven. All three layers are sealed or laminated together or together by adhesion using an appropriate adhesive or by extrusion with organic additives.

 In the same figure, the lowermost portion of the diffusing strip 130, or first layer 131, is made of the same material selected for the outermost portion of the body 120, that is, the first layer 121. The top of the diffusing strip 130, ie the third layer 133, is also made of the same material selected for the innermost part of the body 120, ie the third layer 123. The second layer 132 of the diffusing strip 130 is heated with any of the above materials, for example polyethylene and its derivatives, polyester and its derivatives, polypropylene and its derivatives, nylon and its derivatives, or microwave ovens. It can be made of any material suitable for being made, and need not be made of the same material selected for the second layer 122 of the body 120. All three layers are sealed or laminated together or together by adhesion using an appropriate adhesive or by extrusion with organic additives.

In Fig. 5 showing a cross section of the pouch 100 of the present invention in which the third layers 123 and 133 are absent, the first layer 121 and the second layer 122 of the main body 120 are polyethylene and its derivatives. , Polyester and its derivatives, polypropylene and its derivatives, nylon and its derivatives, or any material suitable for heating with a microwave oven. All layers are sealed or laminated together or together by adhesion using an appropriate adhesive or by extrusion with an organic additive.

Similarly, referring to the same figure, the lowermost portion of the diffusing strip 130, ie the first layer 131, is made of the same material selected for the outermost portion of the body 120, ie the first layer 121. The top of the diffusing strip 130, or second layer 132, is made of the same material selected for the innermost portion of the body 120, ie, the second layer 122. All layers are sealed or laminated together or together by adhesion using an appropriate adhesive or by extrusion with an organic additive.

2 and 5, it can be seen that the diffuse strip 130 is placed under the body 120. In FIG. 2, the top of the diffusing strip 130, ie the third layer 133, is sealed to the innermost part of the body 120, ie the third layer 123, and in FIG. 5, the top of the diffusing strip 130 is shown. That is, the second layer 132 is sealed at the innermost part of the main body 120, that is, the second layer 122. Sealing is accomplished by bonding with a suitable adhesive, extrusion with organic additives, heat sealing, RF, ultrasonic, or similar fusion methods. The pouch is sealed at the edge by heat sealing, RF, ultrasonic, or similar fusion to form the sealed end 150 so that cooked food can be received therein.

7 and 8 show a cross section of the sealing end 150. The lowermost part of the diffusing strip 130, that is, the first layer 131, is the innermost part of the main body 120 of FIG. 7, that is, the third layer 123, or the innermost part of the main body 120 of FIG. 8, that is, the second layer. Overlying layer 122 and sealed by heat sealing. This heat seal may be applied to two different materials, for example the bottom of the diffusing strip 130 or first layer 131 and the innermost of the main body 120 of FIG. 7 or the third layer 123 or of FIG. It is made between the innermost part of the main body 120, that is, the second layer. Both figures are simplified only to show the heat seal between the bottom of the diffusing strip 130, ie the first layer 131 and the innermost layer of the body. In both Figures 7 and 8, the innermost layers of both bodies 120 are shown separated, but the innermost layers of both bodies 120 are actually sealed together.

Sealing by extrusion using an appropriate adhesive or by extrusion with organic additives is more robust than sealing achieved by heat sealing, RF, ultrasonic, or similar fusion methods. Compared to heat sealing between two layers of different materials, heat sealing two layers of the same material together creates a stronger bond between the two layers. Due to the weak bonding formed during heat sealing, the sealing area between the two different materials forms the weakening area 140, and it is this weakening area that allows steam to be discharged, and how the vapor is discharged will be described later. do.

The packaging container is not limited to a centrally sealed flexible pouch. Other types of packaging containers may also be used with the present invention shown in Figures 4 and 5, which are three sided sealed flexible pouches. The present invention is not limited to only flexible pouches. The present invention can also be used for gusset pouches (FIG. 9), upright pouches (FIG. 10), and top sealed food containers (FIG. 11).

The top sealed food container 200 is shown in FIG. In this figure, the inlet, which is defined by the rim of the wall of the container, is a flanged rim representing the surface 160 on which the top seal can be easily sealed. The diffuse strip 130 is sealed to the body 120 as described above, and the innermost layer of the body 120 is the same by means of adhesion, extrusion with organic additives, heat sealing, RF, ultrasonic, or similar fusion methods. The top layer of the diffusive strip 130 of material is sealed. The third layer 123 of the main body 120 is sealed to the rim or container and the third layer 123 of the main body 120 by heat sealing, RF, ultrasonic or similar fusion method, and Made of the same material. Therefore, the first layer 131 of the diffusing strip 130 is sealed to the rim of the container made of the same material as the third layer 123, and the weakened region 140 is formed because the layers to be contacted are different materials. Is formed. The bonding between the first layer 131 of the diffusing strip 130 formed during heat sealing and the rim of the container—a container made of the same material as the third layer 123 of the body—is weak.

The function of the diffusing strip 130 of the body 120 is described in more detail.

When the packaging container is heated in a microwave oven, the moisture contained in the food is heated very rapidly and converted to steam. As the temperature in the packaging container increases during heating, the vapor will expand and thus the pressure in the packaging container increases. Before the pressure in the packaging container increases significantly, the pressure of the expanded steam ruptures the designated weakening area 140 of the packaging container, allowing the steam to be discharged without dispersing the food outlet 141 (Figure 4). ). The presence of the weakening region 140 allows for the rupture of the packaging container to occur so that the pressure of the vapor in the packaging container is not too high to prevent food from being scattered. Forming a weakened area that does not withstand the pressure of vapor contained within the packaging container is a weak bond formed between two different materials when sealed to each other in heat sealing. The bond formed during heat sealing between two layers of the same material is strong enough to withstand the pressure of the steam without rupturing, as compared to the designated weakening area.

The invention is not limited to a packaging container having only one sheet of diffusing strip 130. The packaging container may include a sheet of one or more diffusing strips 130. 12 is an example of a packaging container with a sheet of one or more diffusing strips 130, and a central sealing pouch with a sheet of two diffusing strips is shown. The diffuse strip 130 can be of any shape or size.

It will be appreciated that the invention has been described above by way of example only. At the same time, since the main invention is to provide a weak bond to the sealing area specified by the above-described structure, the position of the diffusing strip should not be limited just as described by any of the above figures. Detailed changes may be made within the scope of the present invention.

The present invention relates to a packaging container having a flexible or diffusible film forming an openable sealing means. In particular, the present invention relates to a packaging container having a flexible or diffusible film for forming a releasable sealing means for storing food for the purpose of being heated in a microwave oven. The present invention is a simpler and more convenient solution for storing food in a packaging container capable of heating cooked food without having to perforate the packaging container prior to heating.

While heating the cooked and packaged food, the fusion point is automatically ruptured so that the diffusing strip of the packaging container is sealed or fused to the packaging container in a manner that allows the expanded steam to be discharged without dispersing the food. This simplified approach ensures that the moisture intended to be contained within the container is maintained, so that the packaged food does not become dry or tasteless. Thus, and unlike conventional patents, consumers do not need to peel off any layers from the packaging container or perforate the packaging container at any stage. Another major advantage in producing laminated films for such packaging containers is the simplicity of not having to consider the amount of perforation required for complete reheating to make the cooked food delicious.

Claims (29)

A packaging sheet for forming a packaging container including an edge and one or more laminates in which the edge is sealed to surround the object, The designated weakening area of the seal is made to rupture by providing a strip to ventilate increasing internal pressure, The strip has a bottom layer made of a first material to be in contact with the innermost layer of the laminate made of a second material and to be sealed to a designated weakened area of the seal, The first and second materials are differently selected from polyethylene, derivatives of polyethylene, polyesters, derivatives of polyester, polypropylene, derivatives of polypropylene, nylon, and derivatives of nylon. The packaging sheet according to claim 1, wherein the seal is formed by thermal means. The packaging sheet according to claim 1, wherein the sealing between the layer made of the first material and the layer made of the second material is relatively soft compared to the sealing between two layers made of the second material. The packaging sheet according to claim 1, wherein the strips are prearranged so as to span the opposite edges of the packaging container. The packaging sheet according to claim 1, wherein the strip is provided as a flange extending from the sealing portion, and the extended flange is folded backward to seal in the edge. The packaging sheet according to claim 1, wherein the strip is formed by extrusion of the film. The packaging sheet of claim 1, wherein the strips are multilayer. The packaging sheet of claim 1, wherein the packaging container is heatable. The packaging sheet according to claim 1 or 7, wherein the strip has a top layer formed of a second material. A packaging container for storing objects The packaging container includes one or more multilayer bodies 120, The multilayer body has an innermost layer that is sealed to form a seal together and a designated weakened area of the seal, The designated weakened area of the seal is made to rupture to vent increasing internal pressure by providing the bottom layer of the multilayer strip that is in contact with the innermost layer of the multilayer body 120 and is sealed, The innermost layer material of the multilayer body and the lowermost layer material of the multilayer strip are packaging containers which are differently selected from polyethylene, derivatives of polyethylene, polyesters, derivatives of polyester, polypropylene, derivatives of polypropylene, nylon, and derivatives of nylon . 11. The packaging container of claim 10, wherein the packaging container is constructed using a material suitable for microwave heating. The packaging container according to claim 10, wherein the sealing of the multilayer strip and the multilayer body is by adhesion using an adhesive, extrusion with an organic additive, heat sealing, high frequency welding, or ultrasonic welding. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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