JPH0717759U - Vacuum package and its connection - Google Patents

Abstract

(57) [Summary] [Objective] To provide a vacuum package which is particularly easy to open. [Structure] Usually, when the sliced ham 1 is vacuum-packed, 5 or 6 sliced hams 1 are put in the recesses of the bottom film 2 formed by vacuum forming or pressure forming in advance, and the top film 3 is covered over the sliced ham 1. The sliced ham 1 is sealed by primary sealing and then degassing to heat-bond the peripheral edges of both films 2 and 3. The top film 3 used for this type of vacuum packaging is usually formed of a single plastic film, but in the present invention, two sheets are provided at the approximately central position of the recess of the vacuum package VP1 for easy opening. The plastic films 4 and 5 are integrally formed so as to overlap each other. Then, the outer film 5 and the inner film 4 are heat-welded to each other in advance along the edge 4A of the inner film 4 to hermetically connect these two films. In some cases, a pressure-sensitive adhesive 7 may be applied to the inner surface of the outer film 4 and adhered to the inner film 3 to protect the heat-welded portion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a vacuum package which is easy to open and a connected body thereof.

[0002]

[Prior art]

 An example of this type of vacuum package is a sliced ham vacuum package. For packaging, first vacuum-form the bottom film to form a recess, fill it with 5 or 6 slices of hum, and then cover the top film and perform a primary seal, and then degas the film. The periphery is heat-welded and sealed. Therefore, even if the cover film is peeled off from the peripheral edge portion, the peripheral edge portion cannot be easily peeled off because it is difficult to separate due to heat welding. Therefore, in this type of vacuum package, the corners of the vacuum package are made to be in a non-adhesive or easily peeled state, as shown in Japanese Utility Model Publication No. 58-5966 and Japanese Utility Model Publication No. 64-2777, to facilitate opening. There is something I did.

[0003]

[Problems to be solved by the device]

 However, in the conventional method, as the unsealing is performed from the corner portion, the unsealing line becomes longer and longer, and accordingly, it is necessary to increase the tensile force accordingly. This tensile force is the maximum before the opening line reaches the contents such as sliced ham, and it is the minimum after reaching the contents, because it is easy for air to enter inside. Therefore, if the bottom film is instantly peeled off by tearing as it is with the tensile force immediately before reaching the contents, the contents may scatter in some cases. Therefore, in the conventional opening method, it is necessary to adjust the pulling force so that the contents do not scatter just before the opening line reaches the contents such as sliced ham. Also, in this type of opening, it is common to peel off the bottom film with the recess for containing the contents formed by vacuum suction, so that the contents contain a considerable amount of water. There is also a problem that water tends to spill when opened. Therefore, an object of the present invention is to provide a vacuum package and a connected body thereof that solve the above problems.

[0004]

[Means for Solving the Problems]

 The above problems can be solved by configuring the top film of the vacuum package as follows. That is, the top film is composed of two films inside and outside, and these two films are overlapped with a predetermined width at a substantially central position of the recess of the vacuum package, and further the outer film is formed along the edge of the inner film. And the inner film are heat-welded to be integrally formed. Further, if necessary, an adhesive for adhering the inner film can be applied to the inner surface of the outer film to increase the strength of the heat-welded portion. Recently, it has been found that multiple vacuum packs of sliced hams are connected in supermarkets.In the present invention, a plurality of the above vacuum packages are stacked on top of each other, and the outer film and the bottom film are stacked at the position where they are stacked. It can also be bonded relatively firmly to form a connected body. Conveniently, the bonding is done by hot melt, for example.

[0005]

[Action]

 The opening is performed by first slitting the outer film along the edges of the heat-sealed inner film, but this slitting is performed by shearing force, and therefore requires little force. Also, even if it is cut open, the force remains constant from one end to the other. Moreover, since air is introduced into the recesses of the bottom film by this slitting and the adhesion between the top film and the bottom film is deteriorated, the peeling between the outer film and the bottom film does not require so much force. Therefore, in the case of the configuration of the present invention, opening is easier than in the conventional case. When opening, the top film side will be the top side due to the constitution. Therefore, even if the contents contain water, the water will be stored in the recesses of the bottom film, so that the water will not be spilled when opening. Further, in the case of the connected body having the above-mentioned configuration, the region of the gripping portion is wide and it is easy to grip, so that the unsealing becomes easier. Also, if they are separated from each other in the opposite direction, they can be separated one by one in the unopened state.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a slice ham vacuum package VP1 with a part cut away. Normally, when the slice ham 1 is vacuum-packaged, the recess of the bottom film 2 previously formed by vacuum forming or pressure forming is formed. Five or six sliced hams 1 are put in the above, and a top film 3 is put on the sliced hams 1 for primary sealing, and then deaeration is performed to heat the peripheral edges of both films 2 and 3 to seal the sliced ham 1.

The top film 3 used for this type of vacuum packaging is usually formed of a single plastic film, but in the present invention, the recessed portion of the vacuum packaging body VP 1 is located approximately at the center position so that it can be easily opened. At the corresponding position, the two plastic films 4 and 5 are integrally formed so that they overlap each other. Then, the outer film 5 and the inner film 4 are heat-welded to each other in advance along the edge 4A of the inner film 4 to hermetically connect the two films. In the present invention, since the heat-welded portion is cut open and unsealed, the width of the overlapping portion of the two films 4 and 5 is set to a width larger than the outer film 5 can be gripped with fingers, and the width of the heat-welded portion is If it is too wide, it will be difficult to cut, so the width is at least such that airtightness is maintained. Both ends of the overlapping portion are finally welded to the bottom film 2 together when the peripheral edge 6 is heat-welded. Therefore, even if the widths of the heat-welded parts of the inner and outer films 4 and 5 are fairly narrow, they are protected to some extent. However, as shown in FIG. 2, apply the adhesive 7 on the inner side of the outer film 5 and attach it to the inner film 4. The heat-welded portion may be further protected. In this case, it is desirable that the adhesive 7 has a relatively weak adhesive force so that the outer film 5 can be easily peeled off.

[0008] Next, referring to FIG. 2, the opening method will be described. First, in the present invention, it is necessary to peel off the outer film 5 located at the center of the vacuum package VP1 and pinch it with fingers. The top film 3 is on top. After making such a state, the outer film 5 on the one end side of the overlapping portion which is heat-welded is peeled off from the inner film 4, and from the side end to the other side end side along the edge 4A of the inner film 4. Cut open the heat-welded part. This opening does not require much force because it is due to shearing force rather than tensile force. Also, as you can see in the figure, air enters into the recesses in the bottom film 2 with only a slight incision. The invasion of the air deteriorates the adhesion between the bottom film 2 and the outer film 5, so that it becomes easy to open the bag without applying much force. Further, in the present invention, the sliced ham 1 which is the content can be easily taken out only by peeling off the outer film 5 to the position of the two-dot chain line in the figure. Therefore, in the present invention, it is possible to avoid the wide contact area which is conventionally peeled from the corner portion and which is difficult to peel off, and can be opened. In addition, the sliced ham is automatically packaged by using a tape-shaped film, but in the present invention, the addition of one step in forming the top film does not cause any problems.

Further, recently, there are many examples in which a plurality of vacuum wraps of sliced ham are bundled and sold at supermarkets and the like. The effect of the present invention can be exerted more by stacking a plurality of vacuum packages than by using the above alone. The configuration of the second invention will be described below with reference to FIG. In the second invention, a plurality of vacuum packages VP1 to VP4 are directly stacked on each other to form a connected body. However, since the connection method of each vacuum package is the same, the third and fourth vacuum packaged bodies are used. Only the case of connecting VP3 and VP4 will be described. In the present invention, since the unsealing is further facilitated by utilizing the connection, the connecting portion is the third overlapped portion of the inner and outer films 4 and 5 of the fourth vacuum package VP4, which faces the overlap portion. It is the bottom film 2 of the vacuum package VP3. The corresponding position is shown between the two-dot chain lines drawn on the bottom film 2 of the empty package VP3. The adhesive 8 is applied in advance between the two two-dot chain lines, and the fourth vacuum packaging body VP4 from right above is overlapped to form a connected body. In this adhesion, it is necessary to make the adhesive force larger than the strength of the heat-welded portions of the inner and outer films 4 and 5. It is desirable to use hot melt for adhesion, and although there are two adhesion points in the figure, it can be increased or decreased depending on the strength of the heat-welded part and the degree of opening. To take out the sliced ham 1 from the connected body, one of the vacuum packaging bodies need only be peeled off in the direction of arrow A. By doing so, the outer film 5 of the vacuum package, which is firmly adhered by the hot melt 8, adheres to the bottom film of the other vacuum package and is peeled off. Compared to the first invention, the area of the grip portion is wider and easier to hold, and thus easier to open. Further, when peeled off in the direction of arrow B, the vacuum packages can be separated one by one without opening.

[0010]

[Effect of device]

 As described above, according to the present invention, the opening is much easier than the opening from the conventional corner portion, and even when the opening is performed, the top film side is turned up. Even if the contents contain a lot of water, it can be opened without spilling. In addition, when the connecting body is used as in the above-described configuration, the area of the gripping portion is wide and it is easy to grip, so that the unsealing becomes easier. Also, if they are separated from each other in the opposite direction, they can be separated one by one in the unopened state.

[Brief description of drawings]

FIG. 1 is a perspective view of a partially cut vacuum package according to an embodiment of the present invention so that the internal structure can be seen.

FIG. 2 is a perspective view showing a state where the vacuum package of FIG. 1 is opened.

FIG. 3 is a perspective view of a connection body in which the vacuum packaging body of FIG. 1 is directly overlaid.

[Explanation of symbols]

 VP1 to 4 Vacuum package 1 Slice ham 2 Bottom film 3 Top film 4 Inner film 4A Inner film edge 5 Outer film 6 Edge 7 Adhesive 8 Adhesive (hot melt)

Claims (3)

[Scope of utility model registration request] 1. A vacuum in which an article is placed in a recess formed in a bottom film, a top film is covered over the recess for primary sealing, and then deaeration is performed, and then the peripheral edges of the bottom film and the top film are heat-welded and sealed. In the package,
The top film is formed integrally by stacking two films, an inner film and an outer film, in a predetermined width at a substantially central position of the recess of the vacuum package, and further thermally welding the outer film and the inner film along the edge of the inner film. A vacuum package characterized by being a film. 2. A plurality of vacuum packages according to claim 1 are stacked directly on each other, and an outer film and a bottom film, which are a part of the top film, are relatively firmly bonded at the predetermined width position. Vacuum package connection body. 3. The vacuum packaged connector according to claim 2, wherein the bonding is hot melt.