Plastic film bag and its use

Abstract

The present invention relates to a plastic film bag (1) with a bag opening (30) and an opposite bag end (32), comprising a plastic film front wall (2), a plastic film back wall (8), a plastic film bag bottom (68), a plastic film intermediate layer (22) arranged between the plastic film front wall (2) and the plastic film back wall (8), and at least one first layer (40) comprising liquid-absorbing material.wherein the first layer (40) is connected via the front (42) to the back (36) of the plastic film interlayer (22) and extends towards the bottom edge (34) of the plastic film interlayer (22) and terminates spaced apart from this bottom edge (34) or extends to the bottom edge (34) or projects in part beyond the bottom edge (34) towards or to the bottom of the plastic film bag (68). The invention also relates to the use of the plastic film bag according to the invention as a shipping bag, in particular for the transport of liquid samples.

Description

[0001] The present invention relates to plastic film bags and their use as shipping bags, in particular for the transport of liquid samples.

[0002] The shipping business is becoming increasingly important worldwide. The constant increase in the volume of goods shipped on the one hand and the growing demands for resource-efficient, sustainable transport on the other hand are increasingly demanding the use of space-saving shipping containers. This can often be easily achieved for transported items that are not harmful to the environment. In the case of hazardous goods or goods that could harm or at least impair people or the environment, the logistics company involved is often required, for a variety of reasons, e.g., official regulations, to use particularly stable and / or liquid-tight single or even multiple packaging. In many cases, the use of different materials is necessary to achieve a sufficient degree of tightness and / or stability. This is often diametrically opposed to efficient freight planning and affects, for example,the transport of liquid samples from the medical sector. Liquid samples such as blood or urine samples are being generated in ever-increasing quantities, particularly during pandemics, not least due to growing public sensitivity. Such samples can be screened fully automatically for relevant pathogens or other components in mass throughput in analysis centers. While it is desirable that such liquid samples do not generate excessive amounts of packaging waste, safe transport and safe handover must never be jeopardized by concessions in packaging. Plastic film bags for transport are known from US2010062216A1 and WO9825835A1.

[0003] Therefore, the object of the present invention was to make shipping containers available which are no longer subject to the disadvantages of the prior art and which, in particular, enable the safe shipping of liquid samples while using as little material as possible.

[0004] Accordingly, according to a first aspect of the invention, a plastic film bag with a bag opening and an opposite bag end was found, comprising a plastic film front wall with a bag opening edge and a first side edge and an opposite second side edge; a plastic film rear wall with a bag opening edge and a first side edge and an opposite second side edge; and a plastic film bag bottom (also called a "first embodiment").The plastic film bag according to the invention in this first embodiment variant has a plastic film intermediate layer arranged between the plastic film front wall and the plastic film rear wall, said intermediate layer having a first side edge and an opposite second side edge, a bottom edge and an opposite opening-side edge, as well as a rear side facing the plastic film rear wall and a front side facing the plastic film front wall. This plastic film intermediate layer is connected, in particular welded, to the plastic film rear wall along the opening-side edge or at a distance from the opening-side edge, from or at a distance from the first side edge in the direction of or up to the opposite second side edge.The bottom edge is spaced from or on the plastic film bag bottom, and the opening edge is spaced from or on the bag opening edge of the plastic film rear wall, in particular spaced from the bag opening edge of the plastic film rear wall. The plastic film bag according to the invention of this first embodiment is further equipped with at least one first layer comprising or consisting of liquid-absorbing material with a front side facing the plastic film front wall and a back side facing the plastic film rear wall, wherein the first layer is connected, in particular welded, directly or indirectly to the back side of the plastic film intermediate layer via the front side.Here, i) the first layer extends towards the bottom edge of the plastic film intermediate layer and ends at a distance from this bottom edge of the plastic film intermediate layer, or ii) the first layer extends to the bottom edge of the plastic film intermediate layer, or iii) the first layer partially projects beyond the bottom edge of the plastic film intermediate layer in the direction of or to the bottom of the plastic film bag. Alternatively or additionally, at least one second layer, comprising or consisting of liquid-absorbing material, can be provided with a front side facing the plastic film front wall and a back side facing the plastic film rear wall, wherein the second layer is directly or indirectly connected, in particular welded, to the plastic film rear wall via the back side.In this case i) the second layer extends in the direction of the bottom edge of the plastic film intermediate layer and ends at a distance from this bottom edge of the plastic film intermediate layer or ii) the second layer extends to the bottom edge of the plastic film intermediate layer or iii) the second layer projects in parts beyond the bottom edge of the plastic film intermediate layer in the direction of or to the bottom of the plastic film bag.

[0005] In this first embodiment of the plastic film bag according to the invention, in a preferred embodiment, the plastic film intermediate layer is welded to the plastic film rear wall from the first side edge to the opposite second side edge at, or preferably at a distance from, the opening-side edge. The bottom edge is spaced from the plastic film bag bottom, and the opening-side edge is spaced from the bag opening edge of the plastic film rear wall. If the first layer containing or consisting of the liquid-absorbing material is used in the first embodiment, it preferably protrudes in sections beyond the bottom edge of the plastic film intermediate layer, particularly in the embodiment in which the plastic film intermediate layer does not extend to the plastic film bag bottom.The remaining section, which in this embodiment does not protrude beyond the bottom edge of the plastic film interlayer, is usually the larger of the two sections in terms of area.

[0006] If the second layer containing or consisting of the liquid-absorbing material is used in the first embodiment, it preferably protrudes in sections beyond the bottom edge of the plastic film interlayer, particularly in the embodiment in which the plastic film interlayer does not extend to the bottom of the plastic film bag. The remaining section, which in this embodiment does not protrude beyond the bottom edge of the plastic film interlayer, is usually the larger of the two sections in terms of area.

[0007] In the first embodiment of the plastic film bag according to the invention, the bottom edge of the plastic film intermediate layer is not connected to the plastic film front wall and the plastic film rear wall. Expediently, the plastic film intermediate layer is not connected to the plastic film front wall and the plastic film rear wall, except for the connection along the opening-side edge or spaced from the opening-side edge to the plastic film rear wall and the connection of the first side edge to the plastic film front wall and the plastic film rear wall in the region of the first side boundary, and the connection of the second side edge to the plastic film front wall and the plastic film rear wall in the region of the second side boundary.

[0008] According to a second aspect, the object underlying the invention is achieved by a plastic film bag with a bag opening and an opposite bag end, comprising a plastic film front wall with a bag opening edge and a first side edge and an opposite second side edge, a plastic film rear wall with a bag opening edge and with a first side edge and an opposite second side edge and a plastic film bag bottom (also called "second embodiment variant").The plastic film bag according to the invention in this second embodiment variant has a plastic film intermediate layer arranged between the plastic film front wall and the plastic film rear wall, said intermediate layer having a first side edge and an opposite second side edge, a bottom edge and an opposite opening edge, as well as a rear side facing the plastic film rear wall and a front side facing the plastic film front wall. This plastic film intermediate layer is connected, in particular welded, to the plastic film rear wall along the bottom edge or at a distance from the bottom edge, from or at a distance from the first side edge in the direction of or up to the opposite second side edge.The bottom edge is located at the bottom of the plastic film bag or preferably at a distance from the bottom of the plastic film bag, and the opening edge is located at or preferably at a distance from the bag opening edge of the plastic film rear wall, in particular at a distance from the plastic film rear wall. The plastic film bag according to the invention of this second embodiment is further equipped with at least one first layer comprising or consisting of liquid-absorbing material with a front side facing the plastic film front wall and a back side facing the plastic film rear wall, wherein the first layer is connected, in particular welded, directly or indirectly to the back side of the plastic film intermediate layer via the front side.In this case, i) the first layer extends in the direction of the opening-side edge of the plastic film intermediate layer and ends at a distance from this opening-side edge of the plastic film intermediate layer, or ii) the first layer extends to the opening-side edge of the plastic film intermediate layer, or iii) the first layer partially projects beyond the opening-side edge of the plastic film intermediate layer in the direction of or to the bag opening. Alternatively or additionally, at least one second layer comprising or consisting of liquid-absorbing material can be provided with a front side facing the plastic film front wall and a back side facing the plastic film back wall, wherein the second layer is directly or indirectly connected, in particular welded, to the plastic film back wall via the back.In this case, i) the second layer extends either in the direction of the opening-side edge of the plastic film intermediate layer and ends at a distance from this opening-side edge of the plastic film intermediate layer or ii) the second layer extends to the opening-side edge of the plastic film intermediate layer or iii) the second layer projects in parts beyond the opening-side edge of the plastic film intermediate layer in the direction of or to the bottom of the plastic film bag.

[0009] In this second embodiment of the plastic film bag according to the invention, in a preferred embodiment the plastic film intermediate layer is welded to the plastic film rear wall from the first side edge to the opposite second side edge at or preferably at a distance from the bottom edge, and the opening-side edge is at a distance from the bag opening edge of the plastic film rear wall.

[0010] If the first layer containing or consisting of the liquid-absorbing material is used in the second embodiment, it preferably protrudes in sections beyond the opening-side edge of the plastic film interlayer, particularly in the embodiment in which the plastic film interlayer does not extend to the bag opening edge. The remaining section, which in this embodiment does not protrude beyond the opening-side edge of the plastic film interlayer, is usually the larger of the two sections in terms of area.

[0011] If the second layer containing or consisting of the liquid-absorbing material is used in the second embodiment, it preferably protrudes in sections beyond the opening-side edge of the plastic film interlayer, particularly in the embodiment in which the plastic film interlayer does not extend to the bag opening edge. The remaining section, which in this embodiment does not protrude beyond the opening-side edge of the plastic film interlayer, is usually the larger of the two sections in terms of area.

[0012] In the first embodiment of the plastic film bag according to the invention, the opening-side edge of the plastic film intermediate layer is not connected to the plastic film front wall and the plastic film rear wall. Expediently, the plastic film intermediate layer is not connected to the plastic film front wall and / or, in particular, the plastic film rear wall, except for the connection along the bottom edge or spaced from the bottom edge to the plastic film rear wall and the connection of the first side edge to the plastic film front wall and the plastic film rear wall in the region of the first side boundary and the connection of the second side edge to the plastic film front wall and the plastic film rear wall in the region of the second side boundary.

[0013] Particularly expedient embodiments of the plastic film bags according to the invention are also characterized in that the first side edge of the plastic film front wall and the first side edge of the plastic film rear wall are connected, in particular welded, to one another to form a first side boundary. Alternatively, and in particular additionally, it can be provided that the second side edge of the plastic film front wall and the second side edge of the plastic film rear wall are connected, in particular welded, to one another to form a second side boundary.

[0014] In expedient embodiments of the plastic film bags according to the invention, the plastic film bag bottom is located at the transition from the plastic film front wall to the plastic film rear wall and can be designed, for example, in the form of a fold, crease, or weld seam. Preferably, the bag bottom represents the transition from the bag front wall to the bag rear wall. The bag front and rear walls are preferably formed as a single piece.

[0015] The liquid-absorbing material of the first and second layers is preferably water-absorbing material or material capable of absorbing alcoholic liquids such as methanol or ethanol. The first and / or, in particular, the second layer of liquid-absorbing material can be designed, for example, as a nonwoven layer. Alternatively, other textile layers can also be used for this purpose, for example in the form of woven, knitted, or warp-knitted fabrics. The liquid-absorbing effect can be attributed in particular to capillary effects of the layer material and / or, in particular, to the hygroscopic properties of the liquid-absorbing material, in particular the nonwoven material. Suitable liquid-absorbing materials include, for example, fiber materials and sponges.Suitable fiber materials include, for example, thermoplastic fibers such as polyolefin fibers such as polyethylene fibers, polyester fibers such as polyethylene terephthalate fibers, and also polyamide fibers, as well as cellulose-based fibers.

[0016] The first layer can be connected directly or indirectly to the back of the plastic film interlayer. With a direct connection, the first layer lies directly against the plastic film interlayer and is connected to it, in particular by gluing or welding, with the latter being preferred. Furthermore, the second layer can also be connected directly or indirectly to the plastic film backsheet. With a direct connection, the second layer lies directly against the plastic film backsheet and is connected to it, in particular by gluing or welding, with the latter being preferred.

[0017] In the case of indirect connection of the first layer to the back of the plastic film intermediate layer, a preferred embodiment provides a further plastic film layer connected to the front of the first layer, via which the first layer is connected to the back of the plastic film intermediate layer. This further plastic film layer is preferably made of the same material as the plastic film front wall, plastic film back wall, and plastic film intermediate layer. In this way, a substantially single-material product can be obtained. To fix the first layer, the further carbon template is connected to the plastic film intermediate layer, particularly by gluing or welding.

[0018] In the case of indirect connection of the second layer to the plastic film back wall, a preferred embodiment provides an additional plastic film layer connected to the back of the second layer, via which the second layer is connected to the plastic film back wall. This additional plastic film layer is also preferably made of the same material as the plastic film front wall, plastic film back wall, and plastic film intermediate layer. To fix the second layer, the additional carbon template is connected to the plastic film back wall, particularly by gluing or welding.

[0019] The connection of the plastic film intermediate layer to the plastic film rear wall extends in the plastic film bag according to the invention from or at a distance from the first side boundary in the direction of or up to the second side boundary, in particular from the first side boundary to the second side boundary.

[0020] Such plastic film bags according to the invention are particularly preferred in which the first side edge of the plastic film intermediate layer is connected to the plastic film front wall and the plastic film rear wall in the region of the first side boundary. Alternatively, and in particular additionally, it can be provided that the second side edge of the plastic film intermediate layer is connected to the plastic film front wall and the plastic film rear wall in the region of the second side boundary.

[0021] Of particular advantage, particularly for machine production, is also an embodiment in which the plastic film front wall, the plastic film back wall and the plastic film bag bottom are formed in one piece.

[0022] Thermoplastics are advantageously used for the plastic film front wall, the plastic film rear wall, the plastic film intermediate layer, and optionally the additional plastic film layer, with polyester, especially polyethylene terephthalate, and polyolefins, especially polyethylene, being preferred. Polyethylene is particularly preferred.

[0023] If thermoplastics are used for the plastic film intermediate layer, the plastic film back wall and the first layer and, if applicable, for the further plastic film layer, the first layer can preferably be connected to the plastic film intermediate layer or the plastic film back wall by means of thermoplastic welding.

[0024] In particularly expedient embodiments, the plastic film bags according to the invention can have a bag closure, in particular a resealable one, in the region of the bag opening.

[0025] In particular, in order to obtain a larger volume, the plastic film bags according to the invention can also be equipped with a first plastic film side wall or a second plastic film side wall, but in particular with a first and a second plastic film side wall.

[0026] The plastic film bags according to the invention are also particularly suitable as shipping bags, especially for liquid samples. In this case, plastic film bags according to the invention are particularly suitable if they are equipped with a, particularly resealable, bag closure in the area of the bag opening.

[0027] The present invention is accompanied by the surprising discovery that shipping goods in the form of liquid samples can be transported safely and reliably using plastic film bags, and these plastic film bags can be manufactured cost-effectively in large-scale mass production. Even if the liquid samples are damaged during transport, it can be reliably ensured that any leaked liquid is absorbed and prevented from escaping from the transport container, and that any other goods being transported in the plastic film bag are not affected.

[0028] Further features and advantages of the invention will become apparent from the following description, in which exemplary embodiments of the invention are explained by way of example with reference to schematic drawings, without thereby limiting the invention. Figure 1 shows a schematic plan view of a first embodiment of the first embodiment variant of the plastic film bag according to the invention, Figure 2 shows a schematic plan view of a second embodiment of the first embodiment variant of the plastic film bag according to the invention, Figure 3 shows a schematic plan view of a third embodiment of the first embodiment variant of the plastic film bag according to the invention, Figure 4 shows a schematic plan view of a first embodiment of the second embodiment variant of the plastic film bag according to the invention, Figure 5 shows a schematic cross-sectional view of the first embodiment of the first embodiment variant of the plastic film bag according to the invention, Figure 6 shows a schematic cross-sectional view of the second embodiment of the first embodiment variant of the plastic film bag according to the invention,Figure 7 is a schematic cross-sectional view of the first embodiment of the second embodiment of the plastic film bag according to the invention, and Figure 8 is a schematic cross-sectional view of a third embodiment of the first embodiment of the plastic film bag according to the invention.

[0029] Figure 1shows a plastic film bag (1) according to the invention according to the first embodiment variant, with a bag opening (30) and an opposite bag end (32). This plastic film bag is formed from a plastic film front wall (2) with a bag opening edge (14) and a first side edge (4) and an opposite second side edge (6), as well as a plastic film rear wall (8) with a bag opening edge (16) and with a first side edge (10) and an opposite second side edge (12). It has a plastic film bag base (68) in the form of a fold.A plastic film intermediate layer (22) is arranged between the plastic film front wall (2) and the plastic film rear wall (8), said intermediate layer comprising a first side edge (24) and an opposite second side edge (26), a bottom edge (34) and an opposite opening edge (28), as well as a rear side (36) facing the plastic film rear wall (8) and a front side (38) facing the plastic film front wall (2). The plastic film intermediate layer (22) is welded to the plastic film rear wall (8) along the opening edge (28) from the first side edge (4, 10) to the opposite second side edge (6, 12). The bottom edge (34) is spaced apart from the plastic film bag base (68). In a corresponding manner, the opening-side edge (28) is spaced apart from the bag opening edge (30) of the plastic film rear wall (8).A first layer (40) made of a nonwoven material is welded to the back (36) of the plastic film intermediate layer (22) by the front side (42) facing the plastic film front wall (2). This nonwoven layer (40) protrudes in sections beyond the bottom edge (34) of the plastic film intermediate layer (22) in the direction of the plastic film bag bottom (68), with the remaining larger section being located above the bottom edge (34). In the illustrated embodiment, the bottom edge (34) of the plastic film intermediate layer (22) is neither connected to the plastic film front wall (2) nor to the plastic film rear wall (8).Rather, there is only a connection along the opening-side edge (28) to the plastic film rear wall (8), as well as a connection of the first side edge (4, 10) to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the first side boundary (70), and a connection of the second side edge (6, 12) to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the second side boundary (72). Accordingly, in this embodiment, the first side edge (4) of the plastic film front wall (2) and the first side edge (10) of the plastic film rear wall (8) are welded to one another to form a first side boundary, and the second side edge (6) of the plastic film front wall (2) and the second side edge (12) of the plastic film rear wall (8) are also welded to one another to form a second side boundary.In the illustrated embodiment, the plastic film bag according to the invention does not have additional plastic film side walls. The schematic cross-sectional view of the embodiment according to . Figure 1 is in Figure 5 reproduced.

[0030] The plastic film bag (1) according to Figure 2 differs from the plastic film bag according to Figure 1 in that the first layer (40) extends to the bottom edge (34) of the plastic film intermediate layer (22), but does not protrude beyond it. The schematic cross-sectional view of this embodiment is shown in Figure 6 reproduced.

[0031] The plastic film bag (1) according to Figure 3 differs from the plastic film bag according to Figure 1in that the first layer (40) ends at a distance from the bottom edge (34) of the plastic film intermediate layer (22), ie does not extend to the bottom edge (34) of the plastic film intermediate layer (22) and does not protrude beyond it.

[0032] Figure 4shows a schematic plan view of an embodiment of the second embodiment variant of the plastic film bag according to the invention. In this embodiment variant, the plastic film intermediate layer (22) arranged between the plastic film front wall (2) and the plastic film rear wall (8) is welded along the bottom edge (34) to the plastic film rear wall (8) from the first side edge (4, 10) to the opposite second side edge (6, 12). The bottom edge (34) is spaced from the plastic film bag bottom (68), and the opening edge (28) is also spaced from the bag opening edge (30) of the plastic film rear wall (8). A first layer (40) made of a nonwoven material is welded to the back (36) of the plastic film intermediate layer (22) with the front side (42) facing the plastic film front wall (2).This nonwoven layer (40) protrudes in sections beyond the opening-side edge (28) of the plastic film intermediate layer (22) in the direction of the bag opening (30), with the remaining larger section being located below the opening-side edge (28). In the illustrated embodiment, the opening-side edge (28) of the plastic film intermediate layer (22) is neither connected to the plastic film front wall (2) nor to the plastic film rear wall (8). Rather, there is only a connection along the bottom edge (34) to the plastic film rear wall (8), a connection of the first side edge (4, 10) to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the first side boundary (70), and a connection of the second side edge (6, 12) to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the second side boundary (72).Accordingly, in this embodiment too, the first side edge (4) of the plastic film front wall (2) and the first side edge (10) of the plastic film rear wall (8) are welded to one another to form a first side boundary, and the second side edge (6) of the plastic film front wall (2) and the second side edge (12) of the plastic film rear wall (8) are welded to one another to form a second side boundary. In the embodiment shown, the plastic film bag according to the invention does not have additional plastic film side walls. The schematic cross-sectional view of the embodiment according to . Figure 4 is in Figure 7 reproduced.

[0033] Figure 8shows a schematic cross-sectional view of a third embodiment of the first embodiment of the plastic film bag (1) according to the invention. A second layer (50) in the form of a nonwoven layer is used therein. This, unlike the first layer of the embodiment according to Figure 1 , welded via its rear side (54) to the plastic film rear wall (8) and projects in sections beyond the bottom edge (34) of the plastic film intermediate layer (22) in the direction of the plastic film bag bottom (68).

Claims

1. Plastic film bag (1) with a bag opening (30) and an opposite bag end (32), comprising - a plastic film front wall (2) with a bag opening edge (14) and a first side edge (4) and an opposite second side edge (6), - a plastic film rear wall (8) with a bag opening edge (16) and with a first side edge (10) and an opposite second side edge (12), - a plastic film bag bottom (68), - a plastic film intermediate layer (22) arranged between the plastic film front wall (2) and the plastic film rear wall (8) with a first side edge (24) and an opposite second side edge (26), a bottom-side edge (34) and an opposite opening-side edge (28) as well as with a rear side (36) facing the plastic film rear wall (8) and a front side (38) facing the plastic film front wall (2), wherein this plastic film intermediate layer (22) is connected, in particular welded, along the opening-side edge (28) or at a distance from the opening-side edge (28) to the plastic film rear wall (8) from or at a distance from the first side edge (4, 10) in the direction of or up to the opposite second side edge (6, 12), wherein the bottom-side edge (34) is present on the plastic film bag bottom (68) or preferably at a distance from the plastic film bag bottom (68) and wherein the opening-side edge (28) is present on or at a distance from the bag opening edge (30) of the plastic film rear wall (8), in particular at a distance from the bag opening edge (30) of the plastic film rear wall (8), - at least one first layer (40) comprising or consisting of liquid-absorbing material with a front side (42) facing the plastic film front wall (2) and a rear side (44) facing the plastic film rear wall (8), wherein the first layer (40) is connected, in particular welded, via the front side (42) directly or indirectly to the rear side (36) of the plastic film intermediate layer (22) and wherein i) the first layer (40) extends in the direction of the bottom-side edge (34) of the plastic film intermediate layer (22) and ends at a distance from this bottom-side edge (34) of the plastic film intermediate layer (22) or ii) wherein the first layer (40) extends up to the bottom-side edge (34) of the plastic film intermediate layer (22) or iii) wherein the first layer (40) projects in parts beyond the bottom-side edge (34) of the plastic film intermediate layer (22) in the direction of or up to the plastic film bag bottom (68) and / or, in particular or, at least one second layer (50) comprising or consisting of liquid-absorbing material with a front side (52) facing the plastic film front wall (2) and a rear side (54) facing the plastic film rear wall (8), wherein the second layer (50) is connected, in particular welded, via the rear side (54) directly or indirectly to the plastic film rear wall (8) and wherein i) the second layer (50) extends in the direction of the bottom-side edge (34) of the plastic film intermediate layer (22) and ends at a distance from this bottom-side edge (34) of the plastic film intermediate layer (22) or ii) wherein the second layer (50) extends up to the bottom-side edge (34) of the plastic film intermediate layer (22) or iii) wherein the second layer (40) projects in parts beyond the bottom-side edge (34) of the plastic film intermediate layer (22) in the direction of or up to the plastic film bag bottom (68), characterized in that the bottom-side edge (34) of the plastic film intermediate layer (22) is not connected to the plastic film front wall (2) and the plastic film rear wall (8), in that the plastic film intermediate layer (22), apart from the connection along the opening-side edge (28) or at a distance from the opening-side edge (28) to the plastic film rear wall (8) and the connection of the first side edge (4, 10) to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the first side boundary (70) and the connection of the second side edge (6, 12) to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the second side boundary (72) is not connected to the plastic film front wall (2) and the plastic film rear wall (8) and in that the connection of the plastic film intermediate layer (22) to the plastic film rear wall (8) extends from or at a distance from the first side boundary (70) in the direction of or up to the second side boundary (72), in particular from the first side boundary (70) up to the second side boundary (72).

2. Plastic film bag (1) with a bag opening (30) and an opposite bag end (32), comprising - a plastic film front wall (2) with a bag opening edge (14) and a first side edge (4) and an opposite second side edge (6), - a plastic film rear wall (8) with a bag opening edge (16) and with a first side edge (10) and an opposite second side edge (12), - a plastic film bag bottom (68), - a plastic film intermediate layer (22) arranged between the plastic film front wall (2) and the plastic film rear wall (8) with a first side edge (24) and an opposite second side edge (26), a bottom-side edge (34) and an opposite opening-side edge (28) as well as with a rear side (36) facing the plastic film rear wall (8) and a front side (38) facing the plastic film front wall (2), wherein this plastic film intermediate layer (22) is connected, in particular welded, along the bottom-side edge (34) or at a distance from the bottom-side edge (34) to the plastic film rear wall (8) from or at a distance from the first side edge (4, 10) in the direction of or up to the opposite second side edge (6, 12), wherein the bottom-side edge (34) is present on the plastic film bag bottom (68) or preferably at a distance from the plastic film bag bottom (68) and wherein the opening-side edge (28) is present on or at a distance from the bag opening edge (30) of the plastic film rear wall (8), in particular at a distance from the plastic film rear wall (8), - at least one first layer (40) comprising or consisting of liquid-absorbing material with a front side (42) facing the plastic film front wall (2) and a rear side (44) facing the plastic film rear wall (8), wherein the first layer (40) is connected, in particular welded, via the front side (42) directly or indirectly to the rear side (36) of the plastic film intermediate layer (22) and wherein i) the first layer (40) extends in the direction of the opening-side edge (28) of the plastic film intermediate layer (22) and ends at a distance from this opening-side edge (28) of the plastic film intermediate layer (22) or ii) wherein the first layer (40) extends up to the opening-side edge (28) of the plastic film intermediate layer (22) or iii) wherein the first layer (40) projects in parts beyond the opening-side edge (28) of the plastic film intermediate layer (22) in the direction of or up to the bag opening (30) and / or, in particular or, at least one second layer (50) comprising or consisting of liquid-absorbing material with a front side (52) facing the plastic film front wall (2) and a rear side (54) facing the plastic film rear wall (8), wherein the second layer (50) is connected, in particular welded, via the rear side (54) directly or indirectly to the plastic film rear wall (8) and wherein the second layer (50) extends in the direction of the opening-side edge (28) of the plastic film intermediate layer (22) and ends at a distance from this opening-side edge (28) of the plastic film intermediate layer (22) or ii) wherein the second layer (50) extends up to the opening-side edge (28) of the plastic film intermediate layer (22) or iii) wherein the second layer (40) projects in parts beyond the opening-side edge (28) of the plastic film intermediate layer (22) in the direction of or up to the plastic film bag bottom (68), characterized in that the opening-side edge (28) of the plastic film intermediate layer (22) is not connected to the plastic film front wall (2) and the plastic film rear wall (8), in that the plastic film intermediate layer (22), apart from the connection along the bottom-side edge (34) or at a distance from the bottom-side edge (34) to the plastic film rear wall (8) and the connection of the first side edge (4, 10) to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the first side boundary (70) and the connection of the second side edge (6, 12) to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the second side boundary (72) is not connected to the plastic film front wall (2) and the plastic film rear wall (8) and in that the connection of the plastic film intermediate layer (22) to the plastic film rear wall (8) extends from or at a distance from the first side boundary (70) in the direction of or up to the second side boundary (72), in particular from the first side boundary (70) up to the second side boundary (72).

3. Plastic film bag according to claim 1 or 2, characterized in that the first side edge (4) of the plastic film front wall (2) and the first side edge (10) of the plastic film rear wall (8) are connected to one another, in particular welded, to form a first side boundary and / or, in particular and, in that the second side edge (6) of the plastic film front wall (2) and the second side edge (12) of the plastic film rear wall (8) are connected to one another, in particular welded, to form a second side boundary.

4. Plastic film bag according to one of the preceding claims, characterized in that the plastic film bag bottom (68) is present in the transition from the plastic film front wall (2) to the plastic film rear wall (8), in particular comprising or consisting of a crease, fold or weld seam.

5. Plastic film bag according to one of the preceding claims, characterized in that the liquid-absorbing material of the first or of the second layer (40, 50) represents or comprises a nonwoven material.

6. Plastic film bag according to one of the preceding claims, further comprising a further plastic film layer connected to the front side (42) of the first layer (40), via which the first layer (40) is connected to the rear side of the plastic film intermediate layer (36), or a further plastic film layer connected to the rear side (54) of the second layer (50), via which the second layer (50) is connected to the plastic film rear wall (8).

7. Plastic film bag according to one of the preceding claims, characterized in that the first side edge (24) of the plastic film intermediate layer (22) is connected to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the first side boundary (70) and / or, in particular and, in that the second side edge (26) of the plastic film intermediate layer (22) is connected to the plastic film front wall (2) and the plastic film rear wall (8) in the region of the second side boundary (72).

8. Plastic film bag according to one of the preceding claims, characterized in that the plastic film front wall (2), the plastic film rear wall (8) and the plastic film bag bottom (68) are formed in one piece.

9. Plastic film bag according to one of the preceding claims, characterized in that the plastic film front wall (2), the plastic film rear wall (8) and the plastic film intermediate layer (22) as well as optionally the further plastic film layer comprise or consist of polyester, in particular polyethylene terephthalate, or polyolefins, in particular polyethylene, wherein polyethylene is particularly preferred.

10. Plastic film bag according to one of the preceding claims, further comprising a, in particular reclosable, bag closure in the region of the bag opening (30).

11. Plastic film bag according to one of the preceding claims, further comprising a first plastic film side wall and / or, in particular and, a second plastic film side wall.

12. Plastic film bag according to one of the preceding claims, characterized in that it represents a shipping bag, in particular for liquid samples.

13. Use of the plastic film bag according to one of the preceding claims as a shipping bag.

14. Use of the plastic film bag according to one of Claims 1 to 12 for the transport of liquid samples.

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