EP3037360A1 - Film packaging bag and method for producing film packaging bags - Google Patents

Abstract

The invention relates to a film packaging bag with an anteroom delimited by bag walls and with at least one carrying handle arrangement (1) on one of the bag walls (2), the carrying handle arrangement (1) comprising a carrier label (3) and a grip band lying flat on the carrier label (3). 4), wherein the grip band (4) along a longitudinal direction (L) has a central grip portion (4a) and starting in the direction of opposite ends (5) fastening portions (4b), where the grip band (4) with the carrier label ( 3), the carrier sheet (3) extending beyond the grip band (4) in the longitudinal direction (L) and secured to a heat-sealable inner side of the associated bag wall (2) by a heat-sealing seam (7) and the grip band (3). 4) is accessible from a bag outside. According to the invention along the longitudinal direction (L) of the distance (a) between the ends (5) of the grip strip (4) and each adjacent edge of the carrier sheet (3) between 8 mm and 22 mm, wherein the carrier sheet with the heat seal seam (7) , which extends between the ends (5) of the grip band (4) and the respective adjacent edge of the carrier sheet (3), is secured to the inside of the associated bag wall (2).

Description

The invention relates to a foil packaging bag having a filling space bounded by bag walls and having at least one handle assembly on one of the bag walls, wherein the handle assembly comprises a carrier sheet and a flat grip on the carrier sheet, wherein the grip strip along a longitudinal direction of a middle handle portion and starting in the direction from opposite ends comprises attachment portions at which the grip band is connected to the carrier sheet, wherein the carrier sheet extends in the longitudinal direction beyond the grip band and is secured by a heat seal on a heat sealable inside of the associated bag wall and wherein the grip band is accessible from a bag outside ,

Film wrapping bags that are designed for increased filling weight or that are comparatively large are often equipped with carrying handles in practice, so that they can be handled more easily by a user.

In the generic foil packaging bag is a disposable product, which is why the most efficient and cost-effective production is sought at a low material usage. In addition, the carrying handle assembly but also to ensure the highest possible comfort, with a cutting of the grip band in the hand of a user, a tearing of the grip band or excessive deformation of the foil packaging bag should be avoided when wearing.

Against this background, the present invention relates to a simple embodiment of a carrying handle arrangement as shown in FIG DE 203 11 386 U1 is known ( Fig. 5 ). The grip band can be grasped at the middle grip portion at its longitudinal edges by the hand of a user, below and laterally to the grip band exclusively the carrier label is arranged, with which the carrying handle assembly is attached to the heat sealable inside of the associated bag wall. Preferably, the grip band formed by a simple film strip is attached only in the direction of its two opposite ends on the carrier sheet, including in the context of the invention, in particular a heat seal is provided.

According to another from the DE 203 11 386 U1 known embodiment ( Fig. 3 ) have the carrier sheet and the grip on a matching length. In the context of such an embodiment, there is the advantage that the carrying handle assembly can be easily made, because for the production in the longitudinal direction of the handle assembly two different width film strips fed and can be superimposed, in which case the two film strips connected to form the carrier label and the grip band and then can be separated from such a strand individual carrying handle assemblies. There is also the advantage that compared to the embodiment described above, based on the material used, the length of the middle grip portion is increased, resulting in improved comfort or material savings. In practice, however, leaks and jolts arise where on the inside of the grip band is sealed with. In particular, at the longitudinal edges of the grip band results in a step that can lead to leaks and can also lead to significant deformations in the heat sealing.

A particularly advantageous in terms of wearing comfort and power distribution handle assembly for a film packaging bag is from the

EP 1 792 722 B1 However, although a relatively large material requirement and a more complicated process control must be taken into consideration, which is why this handle assembly is provided in a special degree for very high-quality film packaging bag.

Different handle arrangements are also from the EP 2 148 820 B1 known. Finally, the reveals EP 2 039 620 B1 a film wrapping bag in the form of a gusseted bag with a grip band arranged on the outside of the gusset.

Against this background, the present invention has for its object to provide a film packaging bag with a handle assembly that can be produced inexpensively and still has good functional properties.

The object of the invention and solution of the problem are a film packaging bag according to claim 1 and a method for producing film packaging bags according to claim 10.

Starting from a film packaging bag with the features described above, the invention provides that along the longitudinal direction of the distance between the ends of the handle belt and a respective adjacent edge of the carrier sheet between 8 mm and 22 mm, wherein the carrier sheet with a heat seal, which is located between the Ends of the handle strap and the respective adjacent edge of the carrier sheet extends, is attached to the inside of the associated bag wall.

According to the invention, a precisely defined supernatant is provided on the carrier label, on the one hand a reliable sealing of the carrier label with the inside of the bag wall allows, but on the other hand allows the most efficient use of space. Along the entire heat carrier seam joining the carrier sheet with the inside of the bag wall, the carrier sheet lies directly on the inside, so that no steps or the like are present. The heat-sealing seam runs in the shape of a frame around the grip band, as a result of which a uniform distribution of force and secure attachment can also be achieved.

Furthermore, precisely defined properties of the heat-sealing seam can be achieved within the scope of the invention. Without further ado, the heat-sealing seam which runs in the form of a frame around the grip band can be closed, so that a particularly reliable, tight closure is ensured. The risk of bursting of the heat-sealing seam due to mechanical stresses can also be reduced by the boundary conditions which remain essentially constant along the entire heat-sealing seam.

Although the invention relates to a particularly simple, cost-effective design of a handle assembly, to provide the well-defined supernatant of 8 mm to 22 mm in the longitudinal direction to provide a sufficiently accurate process control. Thus, it is at most possible with considerable effort to supply two film webs in the longitudinal direction of the handle assembly and then connect with a different length.

Against this background, according to the present invention, there is also provided a special method for the production of foil packaging bags, according to which individual carrying handle arrangements are produced successively transversely to their longitudinal direction. Accordingly, it is provided in the method that in a first production direction for the handle assembly a first film web for forming the grip bands and a second film web for forming the carrier strips are supplied in such a way that the longitudinal direction of the handle assembly is arranged perpendicular to the first production direction. Then individual gripping bands are separated from the first film web, preferably in a uniform cycle, transversely to the first production direction, which are subsequently fastened at a distance from each other on the second film web. It can be provided that due to the process management, the individual grips initially only prefixed on the second film web, for example, be attached and only subsequently a permanent connection, for example by a 0-shaped sealed seam occurs.

In a further, subsequent method step, individual carriers are then separated from the second film web to form the handle assembly transversely to the first production direction, each with a grip band arranged thereon.

The handle assemblies are then individually applied at a uniform distance to a bag film web, with the handle assemblies optionally still being rotated depending on the desired orientation. In the bag film web, openings, cuts or weakenings were previously introduced at uniform intervals on sections provided for receiving the carrying handle arrangements, through which the carrying handle is laterally accessible from the outside in the finished film packaging bag.

The carrying handle assemblies are placed on these sections such that on a first heat-sealable side of the bag film web, the grip tape is covered by the carrier sheet. Subsequently, the carrier sheet with a surrounding the grip band heat seal at the first side of the bag film web Finally, the bag film web is formed either by folding and heat sealing or by the connection with at least one further film web to a bag tube.

The carrier sheet is then located on the inside of the bag tube. Finally, individual bag sections, each with at least one carrying handle arrangement, are separated, filled and closed from the bag tube.

In the context of the invention, it is also readily possible to provide a foil packaging bag with two spaced handle assembly. Especially in the context of such an embodiment, the low production costs and the good functional properties are particularly important.

As can be achieved in the context of the invention by the circumferential heat seal seam between the carrier sheet and the inside of the associated bag wall a secure seal, the film packaging bag is also particularly suitable for liquids.

As previously described, the grip band is accessible from a bag exterior. In the simplest case, a punched-out is provided, through which the grip band can be penetrated laterally. Conveniently, such a punching perpendicular to the longitudinal direction of the grip band is slightly wider than the grip band.

Alternatively, the bag wall on a bag outside also remain on the grip band, in which case the grip band is accessible through incisions or lines of weakness that are first to be torn open. For example In the context of such an embodiment, the bag wall together with the grip band can carry the weight of the foil packaging bag, whereby a thinner material for the grip band can also be taken into consideration.

Even in the context of such an embodiment, the grip itself is not cut and can be fully engaged behind at its longitudinal edges.

In order to allow comfortable handling, the middle grip portion of the grip band not connected to the carrier slip in the longitudinal direction preferably has a length between 125 mm and 145 mm. With a shorter length, it becomes harder to reach behind the grip band. With a greater length results in an increased material requirement, in which case the foil packaging bag can be more deformed and constricted when worn by the tensile forces acting on the grip band.

The total length of the grip band in the longitudinal direction is preferably between 170 mm and 190 mm in order to provide a sufficiently long middle grip portion with an optimal material utilization and on the other hand to allow secure attachment of the grip band to the carrier sheet.

The carrier sheet preferably has a length between 200 mm and 220 mm in the longitudinal direction, so that then in combination with the aforementioned length of the grip band of the supernatant according to the invention between 8 mm and 22 mm, in particular between 10 and 20 mm, for example about 15 mm results.

The width of the carrier label and the grip band transverse to the longitudinal direction is chosen so that both a secure attachment and a comfortable handling are ensured with the lowest possible use of materials. In particular, the grip band should not be too narrow, because otherwise it could cut into the hand of a user. Preferably, perpendicular to the longitudinal direction, the width of the carrier sheet between 70 mm and 90 mm and the width of the grip band between 40 and 50 mm.

In order to allow a sufficient load capacity, the thickness of the grip band is for example between 200 microns and 400 microns, with a multi-layered design of the grip band is preferred. In a multi-layered embodiment, in particular, different materials can be combined to optimize the mechanical properties and in particular the load capacity. For example, the grip band can be formed in three layers and have outer layers of polyolefin, in particular polyethylene and a core layer of a stiffer material, for example oriented polyamide.

In this context, both symmetrical and asymmetric layer compositions come into consideration, wherein the outer layers are preferably thicker than the core layer.

The grip band is expediently heat-sealable on its side lying on the carrier sheet in order to be connected in a simple manner by a heat seal with the carrier sheet. With regard to the distribution of force, for example, a 0-shaped heat seal is suitable.

For the carrier sheet an asymmetrical multi-layer construction is preferably provided because the carrier sheet only on its one, the inside the side facing the bag wall must be heat-sealable, wherein preferably the opposite side of the carrier sheet does not melt in a heat-sealing in order to avoid contamination of the heat-sealing tool. The carrier sheet may, for example, have a good heat-sealable layer of polyolefin, in particular polyethylene and a less heat-sealable layer of polyamide or polyethylene terephthalate. Such a less heat-sealable layer can also contribute to a stiffening of the carrier label and thus to an increase in the carrying capacity, even if such a layer is preferably made only relatively thin and, for example, has a thickness between 10 .mu.m and 30 .mu.m.

The total thickness of the carrier label may for example be between 140 .mu.m and 250 .mu.m, whereby a barrier layer may also be provided without difficulty. As a barrier layer, for example, a metallized plastic layer, a metal layer (in particular aluminum) or a barrier layer made of plastic, such as EVOH, may be provided.

In principle, it is possible that, to increase the carrying capacity, the grip band is connected in sections directly to the inside of the associated bag wall. According to a preferred embodiment, however, it is provided that the grip band is not directly connected to the inside of the associated bag wall, so that the entire weight is transferred from the grip first to the carrier sheet and only from there to the associated bag wall.

Fig. 1

eine Tragegriffanordnung für einen Folienverpackungsbeutel,

Fig. 2

die Tragegriffanordnung gemäß der Fig. 1 an einer Beutelwand eines Folienverpackungsbeutels,

Fig. 3

einen Längsschnitt durch die Anordnung gemäß der Fig. 2,

Fig. 4

einen Folienverpackungsbeutel in Form eines Seitenfaltenbeutels mit einer Tragegriffanordnung an einer Seitenfalte,

Fig.5

eine alternative Ausgestaltung einer an einer Seitenfalte eines Folienverpackungsbeutels angeordneten Tragegriffanordnung,

Fig. 6

eine weitere Variante der in Fig. 4 dargestellten Ausführung,

Fig. 7

einen Folienverpackungsbeutel mit zwei voneinander beabstandeten Tragegriffanordnungen,

Fig. 8

einen Folienverpackungsbeutel mit einer Tragegriffanordnung, der für die Aufnahme von Flüssigkeiten vorgesehen ist.

The invention will be explained in the following with reference to a drawing showing only one exemplary embodiment. Show it:

Fig. 1

a carrying handle assembly for a foil wrapping bag,

Fig. 2

the carrying handle assembly according to the Fig. 1 on a bag wall of a foil packaging bag,

Fig. 3

a longitudinal section through the arrangement according to the Fig. 2 .

Fig. 4

a foil pouch in the form of a gusseted bag with a handle assembly on a side gusset,

Figure 5

an alternative embodiment of a arranged on a side fold of a film packaging bag handle assembly,

Fig. 6

another variant of in Fig. 4 illustrated embodiment,

Fig. 7

a foil pouch with two spaced handle assemblies,

Fig. 8

a film packaging bag with a handle assembly, which is intended for the reception of liquids.

The Fig. 1 shows a simple handle assembly 1, which is provided for the arrangement on an inner side of a bag wall 2. The carrying handle assembly 1 comprises a carrier sheet 3 and a flat resting on the carrier sheet 3 grip band 4, wherein both the carrier sheet 3 and the grip band 4 are formed from film.

Both the carrier sheet 3 and the grip band 4 have a rectangular shape, wherein along a longitudinal direction L of the carrier sheet 3 goes beyond the grip belt 4.

The grip band 4 has, along the longitudinal direction, a central grip portion 4a and, proceeding in the direction of opposite ends 5, attachment portions 4b to which the grip band 4 is fastened to the carrier sheet 3 by O-shaped heat seals 6.

The not connected to the carrier sheet 3 middle handle portion 4a of the grip 4 has in the longitudinal direction L a length l _m between 125 mm and 145 mm, wherein the total length l _{G of} the grip 4 in the longitudinal direction L between 170 mm and 190 mm.

The length l _{T of} the carrier sheet 3 in the longitudinal direction L is between 200 mm and 220 mm, so that along the longitudinal direction L between the ends 5 of the grip belt 4 and a respective adjacent edge of the carrier sheet 3 remaining distance a typically between 8 mm and 22 mm , preferably between 10 mm and 20 mm, for example 15 mm.

The width of the grip band b _G determined perpendicular to the longitudinal direction L is preferably between 40 mm and 50 mm, the width b _{T of} the carrier slip 3 being between 70 mm and 90 mm.

The Fig. 2 shows the carrying handle assembly 1 according to the Fig. 1 Only the carrier sheet 3 is attached to a heat seal seam 7 on an inner side of the bag wall, wherein the self-contained heat seal seam 7 completely surrounds the grip band 4. Furthermore, it can be seen that the grip band 4 is accessible from an outer side through an opening 8 in the bag wall 2, wherein the average grip distance 4 a can be grasped behind the hand of a user.

In the Fig. 2 It can also be seen that the O-shaped heat seals 6 are located partly in the region of the opening 8 and partly laterally arranged behind the bag wall 2 for this purpose.

Conveniently, the opening 8 is slightly wider than the grip 4.

The Fig. 3 shows for further clarification a longitudinal section through the arrangement according to the Fig. 2 ,

The Fig. 4 shows by way of example a film packaging bag in the form of a gusseted bag, in which the carrying handle assembly 1 described above is arranged on a bag wall 2, which forms a gusset. With the handle assembly 1, the gusseted bag can be easily handled.

The Fig. 5 shows a variant of the arrangement according to the Fig. 2 wherein the carrier sheet 3 with the inside of the bag wall 2 connecting heat seal seam 7 has interruptions 9 to provide ventilation channels. In the context of the invention, there is the advantage that 9 such a valve function can be accurately adjusted by the shape of the interruptions.

The grip 4 according to the Fig. 1 to 4 For example, it may have a three-layer structure of 125 μm PE / 25 μm oriented polyamide / 180 μm PE.

The carrier sheet 3 is preferably well heat sealable only on the voltage applied to the bag wall 2 side. For example, a two-layered construction comprising a heat-sealable layer of polyethylene and an opposite layer of polyethylene terephthalate or oriented polyamide is suitable. The layer thickness of the heat-sealable layer may, for example, be 180 μm, with the opposite less heat-sealable layer, for example may have a thickness between 10 microns and 30 microns. Without further ado, a barrier layer can also be provided. For example, a layer structure of 12 μm PET / 9 μm aluminum / 15 μm oriented polyamide / 120 μm polyethylene is suitable.

The Fig. 6 shows a variant in which instead of an opening 8 on the grip 4 in the bag wall 2 only incisions are provided laterally to the grip 4, in which case the bag wall 2 above the grip 4 can also contribute to the carrying capacity of the handle assembly 1. As part of such an embodiment, the grip band 4 and the carrier sheet 3 can be made thinner.

The Fig. 7 shows a further variant of a foil packaging bag, in which two carrying handle assemblies 1 are arranged at a distance from each other. Such a foil packaging bag can optionally be worn on one of the two carrying handle arrangements 1 or also on both carrying handle arrangements 1. In addition, there is also the possibility that the film packaging bag according to the Fig. 7 is worn by two people.

Finally, the shows Fig. 8 a film packaging bag, which is provided for receiving a liquid and correspondingly also has a screw cap 10.

Claims (10)

A foil packaging bag having a filling space defined by bag walls and having at least one carrying handle arrangement (1) on one of the bag walls (2), the carrying handle arrangement (1) having a carrier label (3) and a grip band (4) lying flat on the carrier label (3), wherein the grip band (4) along a longitudinal direction (L) has a central grip portion (4a) and starting therefrom in the direction of two opposite ends (5) fastening portions (4b) at which the grip band (4) connected to the carrier sheet (3) wherein the carrier sheet (3) extends beyond the grip band (4) in the longitudinal direction (L) and is secured to a heat sealable inner side of the associated bag wall (2) by a heat seal seam (7) and wherein the grip band (4) of a bag outer side is accessible, characterized in that along the longitudinal direction (L) of the distance (a) between the ends (5) of the grip band (4) and a respective adjacent Ra of the carrier label (3) is between 8 mm and 22 mm, the carrier label (3) being provided with a heat-sealing seam (7) which extends between the ends (5) of the grip band (4) and the respective adjacent edge of the carrier label (3). extends, is attached to the inside of the associated bag wall (2). Film packaging bag according to claim 1, characterized in that the not connected to the carrier sheet (3) middle handle portion (4a) of the grip strip (4) in the longitudinal direction (L) has a length (l _m ) between 125 mm and 145 mm. Film packaging bag according to claim 1 or 2, characterized in that the grip band (4) in the longitudinal direction (L) has a length (l _G ) between 170 mm and 190 mm. Film packaging bag according to one of claims 1 to 3, characterized in that the carrier sheet (3) in the longitudinal direction (L) has a length (l _T ) between 200 mm and 220 mm. Film wrapping bag according to one of claims 1 to 4, characterized in that the carrier sheet (3) perpendicular to the longitudinal direction (L) has a width (b _T ) between 70 mm and 90 mm and the grip band (4) perpendicular to the longitudinal direction (L) have a width (b _G ) between 40 mm and 50 mm. Film packaging bag according to one of claims 1 to 5, characterized in that the grip tape (4) has at least two film layers and a thickness between 200 microns and 400 microns. Film packaging bag according to one of claims 1 to 6, characterized in that the grip band (4) is not directly connected to the inside of the associated side wall. Film wrapping bag according to one of claims 1 to 7, characterized in that the carrier sheet (3) with the bag wall (3) connecting heat seal seam (7) around the grip band (4) around is closed like a frame. Film packaging bag according to one of claims 1 to 7, characterized in that the carrier sheet (3) with the bag wall (3) connecting heat seal seam (7) around the grip band (4) around the frame-shaped and at least one interruption has as a vent channel. Method for producing film packaging bags according to one of Claims 1 to 9, the carrying handle arrangements (1) each having a carrier label (3) and a grip band (4) lying flat on the carrier label (3). wherein the grip band (4) along a longitudinal direction (L) has a central grip portion (4a) and, starting therefrom in the direction of opposite ends (5), fastening portions (4b) on which the grip band (4) with the carrier slip (3) wherein the carrier sheet (3) extends beyond the grip band (4) in the longitudinal direction (L),
wherein in a first production direction for the carrying handle assembly (1) a first film web for forming the grip bands (4) and a second film web for forming the carrier tabs (3) are supplied such that the longitudinal direction (L) of the handle assemblies arranged perpendicular to the first production direction is
wherein individual grip bands (4) are cut off from the first film web transversely to the first production direction, which are subsequently fastened at a distance from one another to the second film web,
wherein individual carrier sheets (3) are separated from the second film web for forming the carrying handle arrangements (1) transversely to the first production direction, each with a grip band (4) arranged thereon,
wherein a bag film web is fed along a second production direction,
wherein subsequently the bag film web is provided at regular intervals on sections provided for receiving the carrying handle arrangements (1) in each case with an opening (8) or with cuts or at least a weakening,
wherein following each section a carrying handle assembly (1) is placed on a first heat-sealable side of the bag film web such that on the first side the grip tape (4) is covered by the carrier sheet (3),
wherein subsequently the carrier label (3) is fastened to the first side of the bag film web with a heat-sealing seam (7) surrounding the grip band (4),
wherein subsequently the bag film web is converted either by folding and heat sealing or by the connection with at least one further bag film web to a bag tube, and
wherein separated from the bag tube individual bag sections, each with at least one carrying handle assembly (1), filled and sealed.

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