DE6923572U - PACKAGING BAG. - Google Patents

Description

Packing bag

The invention relates to a packaging bag, preferably made of heat-shrinkable material.

Difficulties arise when opening such packaging bags. The Verpaokungspaket is for example with a turkey, then a vacuum is applied and the neck of the bag is gathered and clamped. After that, the Bag shrunk. Even if the clip is later removed from the neck of the bag or the opening, the Do not open the bag far enough to remove the turkey or similar packaged goods from the bag. this has Its cause is that the overall size of the bag is reduced when it shrinks; in particular in the Areas where the puter body did not prevent shrinkage. Thus, when opened, such Packaging particular difficulties which are exacerbated when the bag is made of a material that is difficult to tear down.

It is therefore the object of the invention to provide a packaging bag in which these difficulties are avoided.

According to the invention, this object is achieved in a packaging bag, preferably made of heat-shrinkable material, with a receiving area for the goods to be packaged and a closure area that delimits and encloses part of the receiving area as well as with a rag on the outside of the closure area thereby released; that the flap one to the closure area has a tear edge directed towards it. This tear-open edge makes tearing open the closure area essential relieved.

The invention is illustrated below with the aid of the exemplary embodiments showing figures explained in more detail.

Fig. 1 shows the side view of an embodiment of a packaging bag according to the invention.

Fig. 2 shows a perspective view of a packaging bag according to the invention.

3 shows the lower part in perspective of the packaging bag according to FIG. 2, the flap being pulled off the bag

Fig. 4 shows in perspective how the

Rag used to tear open the packaging bag will.

Fig. 5 shows a perspective view of the torn flap and the associated tear-off strip.

Fig. 6 shows the removal in perspective of the bag after tearing it open.

Fig. 7 shows another embodiment of a packaging bag according to the invention.

Flg. 8 shows an arrangement similar to Figure 2, but with a \. ^R other packaged good. w

The plastic bag or container 10 j shown in Fig. 1: has an opening on the upper edge 11. He also has a;. front wall 12, a rear wall 13 (Fig. 6), side edges!;

14 and 15 as well as a closed bottom 16. The ver jV

v closed bottom has a seal 17 and a rim 18 I ^s ! ·

along the lower edge. In the edge 18 there is a lobe area |:

19 provided, which jgj through an incision 20 in a tab 21 and an approach 22 split 1st. The tear-off edge 23 '" of the tab 21 extends perpendicular to the seal 17 this out. Of course, the is also corresponding

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Incision 20 directed perpendicular to the seal. The edge has a front or top wall 12a and a rear or bottom wall IJa, which are extensions of the walls 12, respectively and 13 of the actual packaging bag (Fig. 3)

The packaging bag 10 is preferably produced in that a single continuous tube made of biaxially oriented plastic film one after the other Arch of uniform shape and without sharp changes in direction is heat-sealed or welded. The arc should preferably be an arc of 13 * 24 cm to 30 * 48 cm , with about 8 inches preferred, which is also the Arch in Fig. 1 has. After this seal has been produced, the bag is separated from the tube below the seal, a rim 18 and a flap area 19 being obtained remains (Flg. l). An incision 20 is made in the flap area 19 in order to produce a flap 21 with a tear-open edge 23. The incision through the folded one should be preferred Side edge 13a of the rare edge of the folded tube and the lower part of the flap area run at right angles to the side edge 15 of the bag. The edge is on its narrowest point expediently a width of

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3.175mm to 4.762mm with 6.350mm being preferred. In some cases it can be on the margin outside of the lobe can be omitted if the closure area itself is sufficiently strong.

Of course, a different construction of the packaging bag is also possible. For example, the bow the seal may be changed and in some cases it is possible to rectilinear or lower the bottom of the packaging bag to be welded together or sealed in another form «. Of the Tabs can be made by cutting the film so that the tab or tab area extends away from the closure area. In this way a tab of any desired size can be made which adjoins any part of the seal of the closure area. Furthermore, two or more flaps can be provided. For example, the packaging bag according to FIG. 7 has two Tabs 36 and 37 below a joint 17 · These tabs can be pulled away from one another to create two openings will. However, the embodiment shown in Fig. 1 is preferred. The closure area can of course can also only be produced after the bag parts have been cut off from the tube. It is also possible to push the bag through

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Assemble different film strips to produce. However, the method of manufacture given first is preferred.

If the packaging bag according to the invention is used for packaging perishable foodstuffs, for example turkey, which have protruding parts such as wings and legs, the bag is preferably made of a thermoplastic film with a balanced orientation / which has a fairly high shrinkage tension, about 14 in each direction , 1 kg / cm to 28.1 kg / cm ² at 96.1 ° C. Such a film exerts even, strong pressure on the packaged goods if the packaging bag is dimensioned according to the size of the goods to be packaged and the amount of shrinkage required width in the non-shrunk state, having a normal shrinkage of 40-43% at 96, I ⁰ C. Such packaged goods are normally chilled or deep-frozen during storage. Therefore, the preferred film should maintain its elasticity at temperatures below -17.8 ° C and preferably at -45.6 ° C and even

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keep at -56.7 ° C for good results when the packaged good is rapidly cooled to low temperatures. The film should preferably be very tear-resistant and tear easily. Depending on the consumer's wishes, the film can be translucent to opaque. The foil is often white or fleischfare-mn to give the packaged goods the desired appearance. Such a colored film is generally translucent so that the packaged goods can be recognized. Since packaging is usually carried out by shrinking with hot water, the film should have good shrink properties in water ^{at temperatures of 93 ° C. to 96.10 ° C.} Beige. Preferably, a foil is used made of crosslinked polyethylene, by biaxial stretching at a temperature of 96, I ⁰ C to a total orientation ratio of 16: was placed. 1 In this particular case the orientation in the transverse direction was about 4: 1 and in the longitudinal direction 4: 1, so that a balanced film resulted with essentially the same orientation in both directions. The preferred oriented film has a thickness of from about 0.038 mm to about 0.076 mm prior to shrinkage.

V'lrd the packing bag for packing perishable

Food, such as ring-shaped sausage, used, which have uniform dimensions and are not frozen during storage, it is preferably made of a thermoplastic film with low oxygen permeability, for example in the order of magnitude -iron 200 to 400 cn? per 0.0254 mm pollen thickness at 22.8 ° C,

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if 1 m is kept below atmospheric pressure for 24 hours, / A lower shrink tension film is suitable and is preferred. This can be on the order of 2.1 kg / cm to 12.6 kg / cm in each direction at 96.1 C, with 2.1 kg / cm to 7 * 0 kg / au being preferred. Such a film adapts very well to the goods to be packaged if the packaging bag is of the appropriate size. After the packaging is completed, the shape is held. The packaging and pouch should be so large that the goods to be packaged can be easily inserted. Furthermore, the free shrinkage, based on the item, should be sufficient to achieve packaging during shrinkage that is free from larger wrinkles. It has been shown that a free shrinkage of 40 to 45 % at 96.1 ° C is desirable and preferred. For a sausage of about 55 * 56 cm, which weighs about 0.45 kg, a packaging bag with the described ones is usually used Properties used, the 17 * 78 cm in the unshrunk state

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wide and 12 inches deep. Such packaged goods are usually at temperatures of around 1.7 ° C stored up to 4.4 ° C and therefore the preferred film I

retain their elasticity at least down to 4.4 ° C. The preferred film is good resistance to fat, tallow and oil and in general have a low permeability to gases have "Preferably, the film should have a water vapor permeability at 37" 8 ⁰ C of less than 1.0, preferably 0.8 g per 0, 0254 mm thick at 100 % RH when 645 cm is treated for 24 hours. The film should preferably be very resistant to tearing and tear on relatively easily. Further, the film is preferably transparent so that the packaged goods can be seen · Since the packaging of foods, such as ring-shaped sausages, is generally carried out by shrinking with hot water, to the film at 93.3 ⁰ C to 96 I ⁰ C good shrinkage own adhesion show in the water. It is preferred to use films made of vinylidene chloride-vinyl chloride copolymer, which have been oriented by biaxial stretching at 48.9 ° C. in a ratio of 16: 1 (to produce an even orientation in both directions, an orientation of about 4: 1 takes place

in the transverse direction and. about 4: 1 lengthways). the preferred oriented film has a thickness of from about 0.025 mm to about 0.076 mm prior to shrinkage.

The two preferred films described above were biaxially oriented. Therefore the values for the Shrinkage stress and the free shrinkage in longitudinal and Cross direction essentially the same.

To determine the gas permeability, a film sample is placed in a sealed cell, so that the film completely separates the upper and lower parts of the cell. The cell and its contents are saved during the The experiment was kept at room temperature (22.8 ° C ± 1 ° C). The top of the cell is purged with dry nitrogen overnight. Dry oxygen (or the one under test Gas) is introduced into the lower part of the cell and is allowed to pass through the foil for a predetermined period of time. The mixture of nitrogen and oxygen in the upper part is in a Haldane-Henderson-Orsat-Gasaaalysagor given. The oxygen in the sample is determined by oxygen absorption. The thickness of the foil is with a Measured micrometers · The speed of passage is measured in

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erredihnet (24 hours, m ² , atmospheres). The permeability is given in cnP (nm, 24 hours, m, atmospheres).

The shrinkage stress is determined by measuring the force exerted by a 2.54 cm wide strip of film between two Holding arms is exercised; one arm is stationary and the

with
other is connected to an electronic voltmeter. A precise adjustment of the tension meter enables the calculation of the force in kg / cm in the sample cross-section.

The free shrinkage is determined by: "Marking a test piece of the film with a square color stamp with a side length of 10 cm. After immersion in water of 96, I ⁰ C for 10 seconds, the linear shrinkage in% is measured.

The water vapor transmission rate is determined by placing a film sample in a sealed cell so that it this divides completely into an upper and a lower part, the cell and its contents are on during the versus hes on Maintained 37.8 ° C ± 1 ° C. The lower "part of the cell becomes partial filled with water to a relative humidity

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of 100 % . Dry air is allowed to flow through the upper part of the cell until a relative humidity of 0 % is measured. A test element in this part of the cell enables the temperature and humidity to be continuously displayed. When the relative humidity in the upper part of the cell has reached 0 % , the cell is closed and the air supply is stopped. Then the speed of the increase in the relative humidity in the upper part is measured in a narrow area at a constant temperature

The complete packaging according to the preferred exemplary embodiment according to FIG. 2 will now be described. The packaged out shown in FIG. 2 is a turkey weighing 5.44 kg and the packaging bag has a width of 33.02 cm with a depth of 55.88 cm measured along the dashed line A in FIG. This computer was pushed into the packaging bag, which was then evacuated by means of a nozzle inserted into the opening of the bag and connected to a vacuum pump. After evacuation , the packaging bag was closed with a metal clip 30. This process was carried out in the known manner as

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for example, in U.S. Patent No. 2,733 V& E. After closing the bag with the clamp, it is shrunk around the turkey. The tension in the shrinking film presses it firmly onto the turkey and keeps it in the specified shape. The appearance of the turkey is enhanced by the smooth, wrinkle-free plastic layer.

In Fig. 3 is the folded flap area with the enlarged incision 20, the extension 22 and the flap 21 shown. It can be seen that the edge 18 rests essentially against the seal 17, around a tear-off strip 31 to form. The edge 18 shrinks to greater strength together and, together with the seal, forms the tear-off strip. The seal 17 and the shrunk edge 18 each form part of the tear-off strip 31 = thus Seal and rim 18 each represent a tear-off strip. In some cases, the seal 17 can be used alone as a Tear-off strips can be used and the edge may be missing.

The lobe area 19 lies shrunk on the side of the Packaging as shown in FIG.

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For a better understanding, the packaging is described in detail using a typical filling and opening process, usually a cooled turkey (about 1.7 ° C) is pushed into the packaging bag 10 and the bag is evacuated and closed in some way, for example with the clip 30. The closed bag is then conveyed through a shrink tunnel with hot water and passes through one or more water spray areas in which the water is sprayed against the packaging from both above and below. The water temperature is usually about 96, I ⁰ C, and the film within 3 to 5 seconds, with release of a portion of the shrinkage stress and the film orientation in close shrunk eο e eee In Flg. 2 packaging shown. If the packaging bag is selected using the advantageous properties described above, the shrinkage tension of 14.1 kg / cm ² to 28.1 kg / cm ² results in tight packaging. The high shrinkage tension presses the protruding parts of the turkey close to the body, so that a well stackable packaging with a pleasant appearance is created. Since the film is very difficult to tear, there is no damage to the packaging during manufacture. The edge

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shrinks at 96.10 ^° C. in the longitudinal direction of the packaging bag by the maximum value, since completely free shrinkage is possible in this direction. The film would of course shrink even more if it is ^{exposed to temperatures above 96.10 °} C. or if it is kept at the same temperature for a longer period of time. The edge is subject to resistance in the width and the longitudinal tension probably causes the flap to lie against the outside of the bag, where it does not interfere and is not inadvertently torn off by customers picking up the packaged goods. It is very advantageous that the flap lies essentially smoothly against the side of the pouch, as this practically eliminates the use of the flap as a handle to lift the package or accidentally tearing it off. The thicker edge is stronger than the film in general and therefore does not break or tear as easily. The edge of the film is relatively poorly oriented or has a significantly reduced orientation in the longitudinal direction, since free shrinkage was possible in this direction, while the shrinkage was limited in the width and thus a stronger orientation was retained. In general, the stronger the film, the easier it is to tear

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she is oriented. Non-oriented films are usually very difficult to tear. It should be noted that the lower edge of the margin and therefore also the flap are open. If this were not the case, so could the rag Include an air bubble if air was present in an enclosed part or peripheral area during the shrinkage.

After shrinking the Fackung this is fed to a freezing means where it is cooled within about 30 minutes to temperatures of -17.8 ⁰ C to -14.4 ° C.

\ The preferred Wänder the packaging of withstanding temperatures down to -25.5 ⁰ C and preferably even down

• to -4o ° C, while maintaining its good elasticity. Of the

; Buyer keeps the temperature at freezing point until shortly

j before opening the package, the package preferably

is thawed before opening. However, the packaging according to the invention can also be very well before thawing open if so desired.

Thereafter, the package is exposed to a storage temperature of I ~ 17.8 ° C or less and during shipping and kept frozen until sold after shipment.

After the usual thawing, the cloth 21 is removed from the Pulled away the side of the enclosure 32 enclosing the computer 33 (Fig. 4). This is done, for example, by lifting with your finger. Then the flap according to FIG. 4 seized and held the turkey with the andoron hand. The flap is pulled briefly up and along the lower part of the package. The tear-off edge, which runs at right angles to the seal, tears right through the seal a. It guides the crack through the seal essentially at right angles to it and thereby reports faulty tearing off. If the flap is pulled across the convex, this essentially tears the tear-off strip 31 following along the seal (Fig. 5).

After removing the flap and the tear-off strip, the thumb is pushed under the edge of the bag, which loosens it slightly from the bag. Then the Packaging, as shown in Fig. 6, peeled off. The film tears very easily, so that the packaging is removed when it is peeled off the foil is torn. In general, the film will tear from the points of the opening where the flap is got through the seal, and further tearing takes place at the point where the flap during

- 18 of opening the package was torn off.

For packaging a product, such as a ring-shaped sausage, a bag with the properties described above are used.

As can be seen in FIG. 8, an annular sausage was pushed into the packaging bag, with the tied Ends are directed towards the opening or the upper edge 11 of the bag. The packaging bag was made in the same way as evacuated when packing the turkey. When the bag is evacuated, it wraps itself around the sausage and those opposite one another lying walls 12 and 13 approach each other in the from the annular interior of the sausage 41 formed area 40 on. The bag is then, as described above, with closed with a clamp JO and treated with hot water in the same way as for the manufacture of the turkey packaging. The walls 12 and 13 come in area during the shrinkage 40 generally in contact with each other, although usually close to the inside of the sausage are separated from each other when the film wraps tightly around the sausage. In the middle In area 40, however, the film walls generally adhere to one another.

different, so that a very attractive package is produced. Otherwise, the packaging is pretty similar the packaging according to FIG. 2. In particular, the flap and the tear-off strip are the same as before described above. Therefore, they will not be again | described.

torn off, but the sausage is grabbed and pulled out of the packaging to the extent that it is immediate Consumption required piece can be cut off. The remaining part of the sausage is pushed back into the bag and this closed by folding. Thus, the packaging according to the invention is not only very light open, but can also be used to store the sausage afterwards. It should be noted that the packaging in the area 40 is only coalesced by a vacuum, so

The packaging according to FIG. 8 is opened essentially in the same way as the packaging according to FIG. 2. Ii

The tab is displayed in the position shown in FIG. 8 lifted and then taken as shown in Fig. 4 and in the in Flg. 5 type shown demolished. The packaging However, it is generally not as in FIG. 6

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that the walls of the bag are no longer compressed after opening and you have a completely opened Receives bag that allows easy access.

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Claims (10)

önsprch 1. Packaging bag, preferably made of heat-shrinkable Material, with a receiving area for the out to be packed and a closure area, the delimits and encloses part of the receiving area, as well as with a tab on the outside of the closure area, characterized in that the tab (21) points towards the closure area (16) directed tear-open edge (23). 2. Packaging bag according to claim 1, characterized in that on the outside of the closure area (16) an edge is provided which divides the edge (18) into a tab (21) and an extension (22) Incision (20), wherein the tear edge (23) of the flap (21) from one side of the incision (20) is formed, I. - 22 - 3. Packaging bag according to claim 1 or 2, characterized characterized in that to form the closure area (16) Parts of two walls of the receiving area (10) are sealingly connected to one another. 4. Packaging bag according to claim 3, characterized § zächnet that the tear-open edge (23) perpendicular to the Seal (17) runs in the closure area (16). 5. Packaging bag according to claim 3 or 4, characterized in that the seal (17) is arcuate. 6. Packaging bag according to claim 5, characterized in that the flap (21) over half the length of the arcuate seal (17) extends. 7. Packaging bag according to one of claims 1 to 6, made from a continuous tube made of oriented thermoplastic film, characterized in, that the film is biaxially oriented in a ratio of about 16: 1 that the bottom of the packaging bag is through Connecting the hose parts is produced, the seal (17) in an arc of about 15.24 cm to extends approximately 12 inches above the walls of the hose and the side edges of the packaging bag extend in a straight line in the direction of the axis of the bag opening, that the edge (18) at the narrowest point about 3 * 175 mm protrudes to about 4.762 mm beyond the seal and that the tab (19) starting from a side edge to approximately the middle of the edge (18) and its lower edge runs perpendicular to this side edge. 8. Packaging bag according to claim 7, characterized in that that the seal (17) is welded in a circular arc of 20.32 cm and that the edge (18) on its narrowest point is 6.350 mm wide. 9. Packaging bag according to one of claims 1 to 8 for producing a shrink pack, characterized in that that the flap (21) in the shrunk state of the packaging baggage lies against the outside of the receiving area and that the seal (17) and the shrunk edge (18) together form a strong tear-off strip. 10. Packaging container according to one of claims 7 to 9, characterized in that the incision (20) from the • · I I I I • · It • ι ι ι ι ι: I · I I •> - 24 - associated rare edge of the packaging bag runs perpendicular to the seal (17). su: sch.