TW201418112A - Evacuable packaging for insecticide-impregnated nets - Google Patents

Abstract

The invention relates to evacuable packaging (10) for keeping and transporting product, divided into at least one filling region (12) for accommodating the product, and at least one carrying region (14) having at least one carry handle (16) for transporting the accommodated product, wherein a labyrinthine seam arrangement (18) is formed between the filling region (12) and the carrying region (14) for removal of air via the carry handle (16). The invention further relates to a process for producing such packaging (10).

Description

Vacuum packaging for impregnating insecticide nets

The present invention relates to vacuum packaging for storing and transporting products such as flexible sheet structures which are compressed into the package and which are also related to the process for producing the package.

When the packaged product is compressed by, for example, packaging, for example, the volume of the packaged product can be substantially reduced by squeezing air from the package and the products contained therein. Packaging suitable for this process is known. For example, the mosquito net is welded to a polyethylene or polypropylene pouch having a punch having a diameter of about 0.5 cm. During the packaging process, air trapped in the folded mesh and between the mesh and the film package escapes through the holes. A disadvantage of such punching is that it allows dirt and moisture to enter the interior of the package and the packaged product. Therefore, the product is in direct contact with the environment, and this causes mold growth especially in the case of textiles.

EP 1 886 929 A1 describes a side-gusset bag, the corners of which are each provided with a welded seam for use as an air removal channel. For this purpose, in the corner of the bag, the air removal passage of the seam arrangement opens in the air removal hole. In addition, the passage is labyrinthed and provides air removal holes in the side gussets of the side gusset pockets. A disadvantage of this solution is that it first limits the air removal performance and secondly limits the water impermeability. In addition, if the interior of the bag is not completely filled with product, residual air can remain in the bag. Finally, the production is expensive and inconvenient because the air removal holes must be stamped into the two sheets of material and the holes in the outer material sheets of the side gussets must then be welded again.

US 2007/0248291 A1 discloses a vented plastic bag for powdered products, Made of flexible plastic material. At least one pocket defines a venting zone characterized by a plurality of perforations. Additionally, a filter medium is provided over the venting zone and it covers the plurality of perforations to preserve the powdered product within the bag. Such solutions known in the art to utilize plastic materials and filter media comprise two different materials which make it at least more difficult, if not impossible, to recycle such bags. In addition, the plastic bag does not include a moisture barrier, and because of the use of two materials, the manufacturing cost is high and inconvenient.

US 6,116,781 describes a flexible vacuumable plastic bag having a one-way valve that includes a single strip between the top and bottom layers of the bag. The strip is joined along its edges to the top and bottom sheets of the bag in a manner that forms two channel regions. Therefore, after the product for packaging is introduced, the hermetic seal can be closed, and air can be discharged from the package via the valve due to rolling up the package. This solution also provides a one-way valve with only moderate air removal and moisture barriers. In addition, the introduction of individual strips in the production of such plastic bags involves cost and inconvenience.

EP 1 607 339 A1 describes a plastic bag with an overpressure air removal device in which an area having an inner wall and an outer wall is formed. In the inner wall, there is an opening that allows gas to be discharged from the inner side of the bag to the area between the inner wall and the outer wall. Further, there is a sub-region in the seam forming a region between the inner wall and the outer wall, the sub-regions being designed in such a manner as to allow gas to escape. In particular, the weld seam or the cemented joint can be weakened by applying the release medium to the plastic in one or both sides, all regions or portions prior to welding, thereby allowing gas to escape. A disadvantage of this solution is that the air removal path is long and thus the air removal performance is reduced. In addition, moisture barriers exist only to a certain extent, and label-to-bag attachment or bag printing is more difficult due to overlapping longitudinal seams.

DE 10 2006 004 291 A1 discloses a pocket having a first air removal aperture on the inner membrane sheet, said first air removal aperture for evacuating the interior of the pocket into the first air removal passage. The second air removal passage communicates with the first air removal passage via the second air removal hole. a third air removal hole of the second air removal passage is used to remove the air from the second ventilation passage gas. Due to the automatic removal of air, there is a pumping effect and an updated air ingress to promote moisture penetration. In addition, the production of bags of this type requires materials of a high level of cost and complexity and makes it more difficult to mark, print and compactly stack the final product.

Known solutions for vacuum packaging have the above disadvantages. Accordingly, there is a continuing need in the industry for vacuum packaging that protects the package material from moisture despite the presence of air removal holes while being easy to manufacture and handle.

The object of the present invention is to provide a vacuumable package for a flexible product such as a textile, more specifically a net impregnated with a long-term insecticide, which exhibits high air removal performance when vacuumed while protecting the product inside thereof. Protect from environmental effects. Therefore, the package is intended to prevent intrusion of dirt or moisture from the environment into the interior of the package. In addition, the package is intended to prevent the substance from spilling out of the interior of the package to the environment in the absence of air removal. Finally, the production of the package should be extremely simple and inexpensive.

The object is achieved by means of a vacuumable packaging for preserving the product, the vacuumable package comprising at least two layers of material joined to each other at the outer edge, and subdivided into at least one filling zone for containing the product and at least one having a further zone of at least one outlet, between the fill zone and the other zone forming at least one chamber system that allows fluid to flow out of the fill zone into the other zone and through the outlet of the package, and there is an outlet in the other zone, The outlet passes through the at least two sheets of material in such a way that the other zone having the outlet acts as an overpressure valve.

The invention further provides for the creation of a vacuum wrapper as described above, comprising the steps of: a) providing at least two layers of superposed material joined to each other at at least one edge; and b) forming at least one filled region for containing the product And at least one other zone having at least one outlet, by introducing at least one chamber system between the filling zone and the other zone that allows fluid to flow from the filling zone into the other zone and out of the package via the outlet. Reached to provide an exit in the other zone that acts as the other zone with the exit The overpressure valve passes through at least two layers of material.

In the case of a combined chamber system and the other zone configured as an overpressure valve, the present invention provides a package that allows for high air removal performance while reliably protecting its internal products from environmental effects. Thus, in particular, by means of a combination of the chamber system and the other zones configured as overpressure valves, a barrier is created which prevents moisture and dirt from entering the filling zone and material overflowing from the filling zone, while still providing air removal from the filling zone. High level of performance. Thus, the packaged product can be quickly compressed by, for example, packaging, and the air is extruded from the package and the product contained in the package under high pressure. After removal of air, the package of the present invention provides a reliable barrier that prevents moisture or dirt from entering the interior of the package and also prevents material from spilling out of the interior of the package. In general, compression of the packaged product can be facilitated in this manner, and compression also improves the stackability of the packaged product and reduces the required storage space. Due to the barrier effect of the package, in addition, reliable products can be transported by preventing both intrusion and spillage of the substance.

The package of the present invention is produced from at least two sheets of material that are joined to each other at the outer edges by, for example, folding, angular pleating, embossing, bonding, riveting, welding, and/or sealing. The layers of material are preferably welded to each other at the edges. In the inner packaging space thus formed, there is at least one filling zone and at least one other zone. In this context, the other zones are typically positioned above the fill zone.

In the following, the terms "horizontal" and "vertical" are used for this typical orientation of the package. Level herein means that the plane component along the fill zone or the other zone extends, for example, as a component of the parting line of the fill zone and the other zones. Therefore, the vertical recognition extends from the filled area to the weight of the other areas. Horizontal and vertical are understood herein to mean substantially horizontal and substantially perpendicular, respectively, including ±15°, or preferably ±5°, and more preferably ±1°, respectively, from horizontal or vertical in the region.

Filled area refers to the area in which the product is positioned in the package. Preferably, after the product is contained, the fill zone is sealed to some extent such that the fluid can be discharged substantially only through the chamber system. This fluid is typically a gas or gas mixture, more specifically air.

The other zone identifies a packaging zone that is configured as an upper space and that is also sealed to some extent such that fluid can be substantially discharged through the outlet. In this context, the term should basically be understood to mean that in addition to the fluid stream, some of the fluids of the aforementioned fluid stream may also be discharged together with the fluid stream via mutually joined, preferably welded edges. This portion is controlled by the tightness of the edges and the joints with typical joints (e.g., weld seams) that are extremely small compared to the fluid flow from the fill zone to the other zones and through the outlet of the package.

In one embodiment, the chamber system includes at least one chamber and at least one horizontal seam extending between the at least one chamber and the edge of the package. In this case, the at least one chamber may comprise a volume defined by a seam arrangement having at least two seams and at least two passages. The volume of the chamber is preferably defined by two seams each associated with a passage. To allow fluid to flow out of the fill zone to the other zone, at least one of the at least two passages is directly adjacent to the fill zone, and at least one of the at least two passages is directly adjacent to the other zone. The at least two passages are preferably offset from one another. Thus, the chamber system having the at least one horizontal seam and the at least one chamber is designed to direct air from the fill region into the other region and outward from the other region via the outlet.

Moreover, in at least one plane, and more particularly in the plane of the sheet of the package, the section of the chamber is designed such that it increases in width relative to the width of the passage toward the interior of the chamber. Thus, fluid can flow through the volume of the chamber via the at least two offset passages, and the flow is split at least once after passing through the passage adjacent the fill zone and before exiting from the outlet.

In one embodiment, at least one of the seam arrangements extends along a line having a vertical component and a horizontal component to direct air flow and thereby increase air removal performance. The at least one seam in the seam arrangement preferably extends at an angle of less than 80°, preferably less than 50° and more preferably between 30° and 45° with respect to the horizontal seam. For example, the at least one seam can comprise an angle of about 45[deg.] with respect to the horizontal seam. In this case, the at least one seam extending at an angle relative to the horizontal seam may extend into the filling zone or the other zone.

Where at least two seams extend at an angle relative to the horizontal seam, at least one seam may extend into the fill zone and at least one other seam extends into the other zone. Preferably, the at least two seams may extend from points on the horizontal seam. In this case, the at least two seams may project in mirror form relative to the horizontal seam into the filling zone and the other zones. More specifically, the at least two seams may extend from a point on the horizontal seam to one edge of the package. In this version, the at least two seams form a triangular configuration with one edge of the package.

In an exemplary embodiment of the invention, the following size ratios have proven to be advantageous between individual zones (i.e., fill zones, chamber systems, and other zones). The size of the fill zone is determined decisively by the size of the product to be packaged. In the case of mosquito nets, for example, the length along the vertical plane is typically up to 1 m, preferably up to 800 mm, and more preferably up to 600 mm, such as, for example, about 570 mm. The length along the vertical faces of the other zones may depend in particular on the shape of the outlet. For example, if the outlet is designed to carry the handle, the other zones produce a length of 60 mm to 90 mm. In one embodiment, the width of the package may be up to 800 mm, preferably up to 600 mm, and more preferably up to 500 mm. The width of the passage may be from 2 mm to 100 mm, preferably from 5 mm to 25 mm, and more preferably from 10 mm to 20 mm, with respect to the minimum distance between the passage-defining ends.

For a typical package, an air removal performance of approximately (570 x 460) mm ² and up to 5000 liters per hour can be achieved. The opening pressure for packaging in water is between 10 mbar and 50 mbar, preferably between 20 mbar and 40 mbar. For the purposes of the present invention, a method of determining the opening pressure is set forth in Example 1.

High air removal performance can be achieved using the above chamber system. In addition, the chamber system does not affect the product in the filling zone, and therefore the package is almost completely filled with product after removal of air, and in practice very little air remains. The shape and size of the seams and passages depend on a variety of factors including the size of the package, the packaging material, and the product to be contained, and can be readily adapted by those skilled in the art.

In one embodiment, the outlet is completely cut or punched out or as a slit in the other zone. In one development, the outlet configured as a slit can be at least partially interrupted by the mesh. In particular, the outlets in the other zones can be configured to carry handles. The die cutting of the exit produces a cut edge bond that adheres the layers of film or film of the package to each other in such a way that the layers of the film adhere to one another. However, when air is removed from the package, air can be discharged through the outlet despite the presence of cutting edge adhesion. In this case, the cutting edge adhesions are separated at least to some extent, and after the air is removed, the film layers are again in contact with each other. Therefore, another barrier is integrated into the outlet and prevents intrusion of moisture or dirt from the packaging environment. In addition, it is configured to provide convenient transportation facilities for the integration of the export handle. The carrying handle thus simultaneously fulfills several functions, namely for air removal, as a moisture barrier and at the same time providing a simple transport.

Examples of suitable materials for producing vacuum-packable materials include polymeric films made from materials such as polyethylene (PE), polyethylene terephthalate (PET), polydecylamine (PA), poly Propylene (PP), polylactic acid (PLA), polyvinyl chloride (PVC), polystyrene (PS), various polyesters, polycarbonate (PC), ethylene-vinyl alcohol copolymer (EVOH), and combinations thereof . Additionally, the at least two sheets of material may comprise a multilayer assembly resulting from a combination of different polymers to tailor the specific characteristics of the sheet of material (e.g., electrostatic properties or barrier properties (e.g., penetration behavior)) to a particular application. More specifically, multilayer coextruded films made from, for example, PE/EVOH/PA/PE can be employed to prevent or at least hinder diffusion and migration through the packaging film.

The at least two sheets of material may also comprise biodegradable materials from the standpoint of biodegradability. For the purposes of the present invention, if the polymeric material is sufficiently biodegradable according to DIN EN 13432, part 2, it is considered to be biodegradable. Thus, if at least 90% of the organic carbon in the material is converted over a test period of no more than 180 days, the material is biodegradable. Particularly suitable for the at least two layers of material may be based on, for example, polylactic acid (PLA), polyhydroxybutyric acid (PHB), polytrimethylene terephthalate (PTT), cellulose acetate, and starch blending. Biodegradable polymer obtained. Such class-based material to include Ecoflex ^TM (based on 1,4-butanediol, adipic acid and terephthalic acid monomer of the aliphatic - aromatic copolyester) and also Ecovio ^TM (PLA part additionally comprises a) The trade name is purchased from BASF.

Additionally, the at least two sheets of material may be formed from an otherwise coated biodegradable material such as paper or non-woven, woven or knitted fabric or a combination thereof. Such biodegradable materials can be coated, for example, on one or both sides via a biodegradable polymeric film as described above. The coating is preferably provided on the side facing the interior of the package to, for example, allow the at least two sheets of material to be welded together. In such embodiments utilizing coated biodegradable materials such as paper, the thickness of the selected biodegradable polymeric film can be lower than where the sheet of material comprises a package comprising only biodegradable polymers. As a result, the package is generally more degradable, as biodegradable materials such as paper can decompose faster than biodegradable polymers.

The at least two sheets of material that can be vacuum packaged can be formed from a film having a thickness of at least 3 μm, preferably at least 6 μm and more preferably at least 8 μm. To form a fill region for inserting the product and at least one other region, at least one of the at least two material sheets, preferably the top sheet layer and the bottom sheet layer along which the outer edges are overlapped, and preferably three Engage each other. The at least two sheets of material packaged may be joined to each other by any method known to those skilled in the art to be suitable for the materials. Such methods include, for example, folding, angular pleating, embossing, bonding, riveting, welding or sealing. In particular, the package may be formed from a tubular film extruded in the form of a tube by, for example, blown film extrusion, or may be folded from a flat film web. The sheet of material may additionally be provided with other product specific components such as imprints, labels or imprints. This step can be carried out immediately after the formation of the film tube or flat film web or after the formation of the seam.

The method of bonding the layers of material described above can also be used to introduce a chamber system between the filled region of the package and the other regions. For this purpose, preferably, the two sheets of material are joined to each other along other seams in the package. When forming a chamber system, at least one horizontal seam and at least one seam comprising at least two seams and at least two passages are joined by, for example, welding Room for layout. For example, if different joining methods are employed, this can be carried out in conjunction with joining the at least two sheets of material in one process step or alternatively in a process step prior to or after joining the at least two sheets of material. In the event that seams (e.g., horizontal seams and seam arrangements of the chamber) are introduced in at least two separate steps, the order selected for the individual steps may be arbitrary.

Additionally, the outlet in the other zone may be die cut or cut such that the outlet passes through the at least two sheets of material in the package. The die cutting or cutting of the exit produces a cut edge bond, and the layers of material in the package are adhered to each other in such a way that the layers of material adhere to each other. However, when air is removed from the package, air can be discharged through the outlet despite the presence of cutting edge adhesion. In this case, the cutting edge adhesions are usually separated to some extent, and thus after the air is removed, the film sheets again adhere to each other, and the other regions having the outlet serve as an overpressure valve. In the case of cutting, the cutting edge adhesion can be produced by stretching, extrusion or hobbing, and the extrusion cutting is better than stretching or tumbling to better bond the sheet of material. Punching also produces good cutting edge adhesion, which supports the above effects.

The outlets herein may be cut or die cut to any desired shape and size, the shape and size being selected according to the package volume, for example, to achieve the desired air removal performance. Therefore, the outlet can be completely die cut or cut or used as a slit. It can also be configured in the form of a perforation formed by arranging a plurality of cuts or punches. The exit cut or die cut in the form of a slit may also be interrupted at least in part by the web. This further supports the adhesion of the at least two sheets of material and the resulting overpressure valve effect.

In a particularly preferred embodiment, the outlet is provided in the other zone in the form of a carrying handle. The outlet configured as a carrying handle thus simultaneously fulfills several functions, namely for air removal, as another moisture barrier and at the same time providing a simple transport.

After forming the chamber system and the other regions having the exit, the package preferably provides more than one opening at one edge of the fill region to fill the fill region with the product. After inserting the product, it can be sealed in the same way as other edges that have been joined to each other according to the above method. I want to be part of the opening. The package form of the invention may therefore also be referred to as a package or bag.

A preferred embodiment of the manufacturing process provides a film tube that is provided with product-specific components (e.g., imprints) where appropriate, and that is subsequently assembled. This assembly covers the formation of seams for forming the fill zone, the other zones and chambers, and the formation of outlets. Alternatively, the film tube can be divided into individual packages by perforation and wound onto a roll. Alternatively, the form of the package can be singulated.

Another preferred embodiment of the production process provides a film web that is optionally provided with product specific components (e.g., imprints) at appropriate locations, and the tubes are formed from the film web by angular pleats. Then, the assembly as described above is carried out in another step.

According to a preferred embodiment of the invention, the at least two sheets of material are joined to each other by, for example, welding, in the region envisaged as part of the opening for product insertion. Alternatively, it is contemplated that a portion of the opening for insertion of the product may also be provided with a closure member. The closure member is intended to close as intended to be part of the opening after insertion of the product. The member can be a single closure or a multiple closure member.

Such a closure member can comprise, for example, an adhesive strip that is lined with a removable film and mounted on the package, or a strip that is provided with such an adhesive strip and that can be folded back. Additionally, the closure member can comprise at least one self-adhesive layer, i.e., a layer applied to the package or to the strip of the package and closed by the application of pressure. The self-adhesive layer should be activated by, for example, applying moisture, heat or removing the protective film. For the joining of two sheets of material, in particular, the corresponding binders and adhesion compositions and corresponding auxiliaries are known to those skilled in the art. All should be kept in mind that when the package is squeezed, the fluid should be discharged from the outlet, and in other words the layers of material are joined to each other in a manner that is as airtight and impervious as possible.

The horizontal projections of the package of the present invention may be completely arbitrary, circular to polygonal, and are preferably circular, triangular, quadrangular, borderless or hexagonal. In the context of the present invention, the horizontal projections are associated with the closure of any closure member present. this invention A particularly preferred embodiment of the package has a rectangular horizontal projection. Such horizontal bulging makes it particularly easy to mark the package.

The invention further provides an evacuated package of the above type wherein the product is contained in a compressed form. After the product is introduced into the package, the system of the invention (consisting of the chamber system and the outlet) forms, for example, during the packaging process, the possibility of air escaping for storage in the product (eg, a folded web) and between the product and the film package. way. As a result, the volume of the package is reduced and the package can be extruded into a stackable form. For this purpose, the packaged product can be introduced into a device for packaging, and preferably introduced into the filling zone in the extruder and the other zone outside the extruder to allow fluid to escape freely. In the compressed state, the products contained in the package of the present invention are highly stackable and take up very little space.

The invention likewise provides for the use of a package as described above for transporting and preserving products which are moisture sensitive and which tend to form mold or cause certain hazards and therefore must be securely sealed. The package of the invention is more particularly useful for packaging seeds of chemically treated textiles or dressings.

More preferably, the package of the present invention can be used to package textiles treated with long-acting insecticides. Substrates treated with long-term insecticides are designed to release the pesticides they contain over a long period of time. Thus, for example, mosquito nets impregnated with insecticides can be used to control vector-borne diseases such as malaria, yellow fever, dengue fever, lymphatic filariasis, and leishmaniasis. In addition to applying insecticide sprays to the inner walls of houses, the use of such nets, for example, forms one of the pillars of the global "Roll Back Malaria Partnership" project and is by the WHO (World Health Organisation) recommend. To ensure effective protection over an extended period of time, the webs must be impregnated in such a way that the pesticide does not lose even after considerable washing. Such a network that has been treated with a specific insecticide/binder combination is also known as LLIN (Long-Term Insecticide Network).

Other applications of substrates treated with long-term pesticides can be extended to crop protection, Harvesting or storage of protected and/or stored materials of plants and plant parts. These classes of substrates are specifically useful for protecting against pests in a variety of settings. Therefore, not only field fruits such as tomatoes, apples or cherries can be protected, but also fruits that have been harvested can be protected. In addition, the substrates (especially nets) can be used to protect the harvested tobacco plants from pests. In forestry, pests can be kept away from stored wood in a similar manner. The substrate treated in this manner during the transport of the material may, for example, protect the cargo from pests. Thus, for example, the container can be equipped with a treated web and this allows for additional gassing as soon as it arrives in the country, thereby limiting the corruption of the imported food. The substrate treated by the long-term insecticide (more specifically, the mesh) may further comprise pheromone and thus may also be used as a trap.

The insecticides used in this context are, for example, pyrethroids, which are therefore insecticides which have a high lethal effect not only on insects but also have low toxicity to mammals, and also try to bite in insects. Therefore, the insect is "stunned" (called the stunning effect) by rapid progressive paralysis before the disease is transmitted. Another suitable insecticide is chlorfenayr, including, for example, in a mixture with pyrethroids.

Textile materials treated with long-term insecticides are used, for example, in the form of coverings or covers, such as for example, bed covers, mattresses, pillows, curtains, wall covering, Carpets, windows, cabinets and curtains, blankets, tarpaulins and canvas strips. Preferred are nets, more specifically mosquito nets, such as, for example, bed nets for protection against mosquitoes and other harmful insects.

It has emerged that the package of the invention is particularly suitable for packages/webs, especially mosquito nets, which are treated with long-term insecticides. Such networks are described in WO 2005/064072 A2, WO 2011/003845 A2 or WO 2011/003861. These networks are primarily used in areas where there is a high risk of transmitting malaria. Unfortunately, there has been very little research and development on waste disposal and waste recycling in these areas, which has resulted in significant environmental advantages in packaging that can be easily composted with a less environmental burden than polyethylene or polypropylene film.

Materials treated with long-term pesticides share the characteristics of releasing pesticides only at low doses. It is thus possible to package the long-term insecticide-treated textiles very efficiently by means of the package of the invention. Since the chamber system is used for air removal and the other zones are configured as overpressure valves, excess air can escape during the packaging process without harming the environment or people. In addition, the combination of seam placement and carrying handles provides an effective moisture barrier. This prevents moisture from entering and the pesticide is not washed away.

10‧‧‧vacuable packaging

11‧‧‧Package interior

12‧‧‧filled area

14‧‧‧Support area

16‧‧‧ Carrying handles

18‧‧‧ room system

20‧‧‧ horizontal seams

22.1‧‧‧Other seams

22.2‧‧‧Other seams

24.1‧‧‧ pathway

24.2‧‧‧ pathway

26.1‧‧‧ pathway

26.2‧‧‧ pathway

28.1‧‧‧Horizontal joint access

28.2‧‧‧Horizontal joint access

30.1‧‧‧ angle

30.2‧‧‧ Angle

32‧‧‧Vertical component

34‧‧‧ horizontal component

36.1‧‧‧First leg

36.2‧‧‧First leg

38.1‧‧‧Second leg

38.2‧‧‧second leg

40.1‧‧‧ points on horizontal seams

40.2‧‧‧ points on horizontal seams

42.1‧‧‧ Top edge of the package

42.2‧‧‧Bottom edge of the package

42.3‧‧‧ Side edge of the package

42.4‧‧‧ Side edge of the package

44‧‧‧Cut out the carrying handle as a slit

46‧‧‧Manually punched out the handle

48‧‧‧ mesh

50‧‧‧ Vertical extension of the carrying area

52‧‧‧ Vertical extension of the filling area

54‧‧‧Remove the cut-out of the incision on the handle

58‧‧‧Air flow from seams to the carrying area

60‧‧‧Air flow from the carrying area via the carrying handle

62‧‧‧ slitting

64‧‧‧weld end

100a‧‧‧Process sequence

100b‧‧‧Process sequence

102‧‧‧ provides tubular film

104‧‧‧Printing

106‧‧‧Assembly

108‧‧‧ providing membrane mesh

110‧‧‧ provides tubular film

112‧‧‧Printing

114‧‧‧Assembly

Figure 1 shows a schematic representation of a package-oriented view of a package of the invention for holding a product, Figure 2 shows a schematic representation of the package of the invention of Figure 1 and indicating the flow of air, Figure 3 shows another embodiment of the package of the present invention, Figure 4 shows another embodiment of the package of the present invention, Figure 5 shows an exhaustive view of the beveled weld seam, Figure 6 shows an embodiment of a production process in the form of a flow chart, Figure 7 shows another embodiment of a production process in the form of a flow chart.

The invention will be explained in more detail below with reference to the accompanying drawings.

Figure 1 shows a schematic representation of a package 10 of the present invention for storing and transporting products. The package 10 is in the form of a bag formed by joining two film layers, for example, at the edges 42.1, 42.2, 42.3, 42.4 of the package 10. In the embodiment shown in FIG. 1, the package 10 has a rectangular shape with an extension of the horizontal component 34 that is less than the vertical component 32. In addition to the rectangular shape, the package 10 can also assume any other shape desired, such as a circle, a triangle, or a polygon.

In addition, the package 10 is subdivided into two zones 12, 14 along the horizontal component 34. Thus, a first zone 12 is formed which serves as a filling zone 12 for receiving the product, followed by a second zone 14 which forms a carrying zone 14 with a carrying handle 16. The carrying handle 16 herein allows for convenient transport of the package 10 and the products contained therein. In the embodiment shown in Figure 1, the carrying area 14 is sag The straight extension 50 is smaller than the vertical extension 52 of the fill zone 12. Thus, the carrying area 14 occupies less than a quarter of the overall vertical component 32 of the package 10. Conversely, the fill area 12 and the horizontal extensions 34 of the carry area 14 are substantially identical.

In an embodiment different from that shown in Figure 1, the fill area 12 and the carry area 14 can be sized to accommodate the product to be packaged. Thus, for example, in the case of lightweight products, such as textiles, it is advantageous to form a very small carrying area 14, and the carrying handle 16 is sufficient to allow the user to transport the package 10. In the case of heavier products, such as building materials, the larger carrying area 14 can be selected to facilitate stability, particularly to enhance the carrying handle 16.

The carrying handle 16 is additionally die cut into a slit 44 in the carrying area 14. This slit 44 is formed into a semicircular shape, and the portion 54 is cut out. The user can thus grasp the carrying handle 16 to facilitate transport of the packaged product.

In addition, the carrying handle is used to remove air from the package 10 and in particular from the filling zone 12. For this purpose, a chamber system 18 is provided between the filling zone 12 and the other zones 14, which is in the filling zone 12 and the other zones 14 by means of the paths 24.1, 24.2, 26.1, 26.2 offset on the horizontal component 34. A fluid connection is created between them. After the product is introduced into the fill zone 12, the package 10 can be sealed at, for example, one of the edges 42.2, 42.3, 42.4, and then stored in a product (eg, a folded web) and product and package 10 during packaging. The air between them can escape through the chamber system 18. The chamber system 18 thus allows air flow from the fill zone 12 into the other zone, which is designed as the carry zone 14 in the exemplary embodiment shown. From this other zone, air flows outwardly through the carrying handle 16 into the environment of the package 10.

The chamber system 18 of the embodiment shown in Figure 1 includes offset channels and seams 22.1, 22.2 and horizontal seams 20. This horizontal seam 20 separates the filling zone 12 from the carrying zone 14 and the horizontal seams allow the sections 28.1 and 28.2 to be open at each edge 42.3, 42.4 of the package 10 in each case. In this way, the passages 28.1 and 28.2 are produced at the edges 42.3, 42.4 of the package 10 in each case.

The other seams of the chamber system 22.1, 22.2 are in each case in the horizontal joint The area of roads 28.1 and 28.2 extends to the edges of package 10, 42.3, 42.4. Furthermore, the seams 22.1, 22.2 each have two legs 36.1, 36.2, 38.1, 38.2 which extend from points 40.1, 40.2 on the horizontal seam 20 in the embodiment shown in Figure 1 and comprise approximately 90 (±10)° angles 30.1, 30.2. Thus, the two legs 36.1, 36.2, 38.1, 38.2 project in mirror form with respect to the horizontal seam 20 into the filling zone 12 and the carrying zone 14.

Thus, the chamber system 18 is designed such that air can flow out of the filling zone 12 into the carrying area 14 during bale packaging and outward from the carrying area via the carrying handle 16. Such air flow generated during the packaging process is shown in Figure 2. Thus, the air 56.1, 56.2 located between the product and the package 10 in the product (eg, the folded web) and in the fill zone 12 initially escapes through the seam arrangement 18 with the paired labyrinth route during packing. This causes the air flow 56.1, 56.2 to enter the welded arrangement 18 from the filling zone 12 via the passages 22.2, 26.2, 28.2. Finally, the air 58.1, 58.2 escapes from the seam arrangement 18 into the carrying area 14. After entering the carrying area as the flow through the chamber system 18, the air 60.1, 60.2 finally flows into the packaging environment 13 via the carrying handle 16.

In addition to the vacuum design of the package 10, the removal of air via the carrying handle 16 in accordance with the present invention has the effect of arranging another barrier between the interior 11 of the package and the packaging environment. This barrier actually prevents the infiltration of dirt or moisture from the packaging environment and thus allows the packaged product to be effectively protected from mold growth and accumulation of dirt within the package interior 11.

In addition, since the cutting edge of the punching and carrying handle 16 is adhered, air can be discharged from the inside 11 of the package, but the air is not intruded. Thus, the effect of cutting edge adhesion is that the slits 44 in the carrying handle 16 are at least partially open during the discharge of air, such as by packing the package 10, and are closed again after removal of air.

Figure 3 shows another embodiment of the package 10 of the present invention. This embodiment corresponds to the embodiment of Figure 1 with respect to the fill zone and the labyrinth seam arrangement 18. However, in contrast to Figure 1, the carrying handle 16 is completely die cut out.

Figure 4 shows a schematic representation of another embodiment of the package 10 of the present invention for preserving a product. Table diagram. Similar to the embodiment shown in Figures 1 and 2, the package 10 is designed as a bag formed by joining two film plies, for example, at the edges 42.1, 42.2, 42.3, 42.4 of the package 10. In this version, the package 10 also has a rectangular shape with an extension on the horizontal component map 34 that is less than the vertical component 32. In addition to the rectangular shape, the package 10 can also assume any other shape desired, such as a circle, a triangle, or a polygon. In addition, the package 10 is subdivided into two zones 12, 14 along a horizontal component 34.

Contrary to the embodiment of Figures 1 to 3 in which the outlets in the other zones 14 are designed to carry the handle 16, Figure 4 shows two outlets 62 which are die cut into slits. In this case, the slit 62 passes through the two sheets of material. The resulting cut edge bond has the effect of integrating another barrier into the package 10, which prevents moisture or dirt from penetrating from the packaging environment. In other embodiments, any number of outlets in different shapes may be provided.

Air can be discharged from the package 12 via the slit 62 from the package 10, more specifically via the chamber system 18. For this purpose, the chamber system 18 includes passages 24.1, 24.2, 24.3, 26.1, 26.2, 26.3 that are offset from each other and create a fluid connection between the fill region 12 and the other regions 14. After the product is introduced into the filling zone 12, the package 10 can be sealed at one of the edges 42.2, 42.3, 42.4, for example, and then, during packaging, between the product (eg, a folding net) and between the product and the package 10 The air can escape through the chamber system 18. Air flows outwardly from the chamber system through the slit 62 into the environment of the package 10.

In contrast to Figure 1, the chamber system 18 of Figure 4 includes a plurality of passages in the seams 22.1, 22.2. In this case, the horizontal seam 20 separates the fill zone 12 from the carry-over zone 14, and in each case creates passages 28.1 and 28.2 at the edges 42.3, 42.4 of the package 10. The other seams 22.1, 22.2 of the chamber system 18 each extend in the region of the two passages 28.1, 28.2 of the horizontal seam to the edges 42.3, 42.4 of the package 10, and the seams 22.1, 22.2 each have three legs 36.1, 36.2 36.3, 36.4, 38.1, 38.2, 38.3, 38.4. In the embodiment shown in Figure 1, the legs 36.1, 36.2, 36.3, 38.1, 38.2, 38.3 extend from the legs 36.4, 38.4 extending vertically to the horizontal seam 20. From the end of the legs 36.4, 38.4, The legs 36.1, 36.2, 36.3, 38.1, 38.2, 38.3 extend in each case to the horizontal seam 20 to the filling zone 12 and other zones 14 in mirror image at an angle of 30.3, 30.4 of approximately 45°. The legs 36.1, 36.3, 38.1, 38.3 each form two passages 24.1, 24.3, 26.1, 26.3.

Figure 5 shows an exhaustive view of the legs 38.2 and the edge seams 42.1, 42.4. The seam arrangement used to form the chamber system 18 is typically formed by a weld seam having a width of from about 2 mm to 8 mm, and preferably from 5 mm to 6 mm, to withstand the pressure load during packing. In addition, due to the design of the weld seam 38.2 forming the leg 38.2, the air flow can be directed. In the embodiment shown in Figure 5, the ends 64 of the legs 38.2 assigned to the edges 42.4 of the package are designed to be oriented substantially parallel. Thus, as the transition from the chamber system 18 to the other zone 14, the air flow 58.2 is directed through a substantially linear boundary between the leg end 64 of the package and the edge 42.1. Thereafter, the steering is directed at the edge 42.1, and thus the air can be discharged via the outlets 44, 46, 62. The design of the leg end 64 shown in Figure 5 therefore has a bottleneck effect. If the leg ends 64 are inclined toward the outlets 44, 46, 62, the air can escape more quickly and the air removal performance can be further increased.

Figures 6 and 7 show two possible embodiments of a process for producing a package of the present invention in the form of flowcharts 100a and 100b.

In the embodiment of FIG. 6, a membrane tube 102 is provided that is provided with product-specific components (eg, imprints) 104, where appropriate, and is then assembled 106. This assembly covers the formation of the fill zone, the formation of the other zones and chamber seams, and the formation of the exit. In addition, the film tube can be divided into individual packages by perforation and wound onto a roll. Alternatively, the form of the package can be singulated.

In the embodiment of Fig. 7, a membrane web 108 is provided which is optionally provided with product specific elements (e.g., imprints) 112 at appropriate locations, and then the tube 110 is formed from the membrane web by angular pleats. Then, in another step 114, the assembly is carried out as described above.

Example 1

The impermeability of the package of the invention is demonstrated in a test setup in which the package (including the packaged product) is stored in a sink for an extended period of time. The package used herein corresponds to the embodiment shown in Figure 1, wherein each leg and chamber system has a passage. In addition, a carrying handle that additionally includes two meshes on the carrying handle is formed. The filling area of the exemplary package is (80 x 460) mm ² . The width of the passage protruding into the legs in the filling zone is at most 10 mm. The passage that protrudes into the legs in the other zone is selected to be about 20 mm, which is measured at the edge 42.1 of the package. The angle between the legs and the horizontal seam is approximately 45°.

The opening pressure is determined in the water. For this purpose, the package was completely submerged into the water with a water level of approximately 500 mm above the package and pressure was applied evenly onto the package. The pressure at which the air is initially removed, in other words the bubble begins to rise, is identified as the opening pressure under water. For the package illustrated by the above examples, this experiment indicates that for a water level of about 500 mm, the minimum air removal pressure measured under water is about 30 mbar. Furthermore, the air removal performance was determined to be >220 liters/hour at 10 mbar and >2500 liters/hour at 100 mbar.

Fill the package with a piece of absorbent paper and seal it. This construct is completely submerged in water for a prolonged period of time. After 48 hours and after one week, the moisture of the absorbent paper was analyzed. In order to evaluate whether the moisture has penetrated the package, the discoloration of the absorbent paper is checked because the absorbent paper is discolored in a wet state. Water is not allowed on the absorbent paper during the time period mentioned and therefore no water is detectable in the package. Therefore, the test results convincingly show that the package of the present invention can effectively combine good air removal characteristics with moisture impermeability.

10‧‧‧vacuable packaging

11‧‧‧Package interior

12‧‧‧filled area

14‧‧‧Support area

16‧‧‧ Carrying handles

18‧‧‧ room system

20‧‧‧ horizontal seams

22.1‧‧‧Other seams

22.2‧‧‧Other seams

24.1‧‧‧ pathway

24.2‧‧‧ pathway

26.1‧‧‧ pathway

26.2‧‧‧ pathway

28.1‧‧‧Horizontal joint access

28.2‧‧‧Horizontal joint access

30.1‧‧‧ angle

30.2‧‧‧ Angle

32‧‧‧Vertical component

34‧‧‧ horizontal component

36.1‧‧‧First leg

36.2‧‧‧First leg

38.1‧‧‧Second leg

38.2‧‧‧second leg

40.1‧‧‧ points on horizontal seams

40.2‧‧‧ points on horizontal seams

42.1‧‧‧ Top edge of the package

42.2‧‧‧Bottom edge of the package

42.3‧‧‧ Side edge of the package

42.4‧‧‧ Side edge of the package

44‧‧‧Cut out the carrying handle as a slit

48‧‧‧ mesh

50‧‧‧ Vertical extension of the carrying area

52‧‧‧ Vertical extension of the filling area

54‧‧‧Remove the cut-out of the incision on the handle

Claims (17)

A vacuum pack (10) for holding a product comprising at least two layers of material joined to each other at edges (42.1, 42.2, 42.3, 42.4) and subdivided into at least one filled area for containing the product (12) and at least one other zone (14) having at least one outlet (16), between which at least one fluid is allowed to flow from the filling zone (12) and the other zone (14) The chamber system (18) exiting the package via the outlet (16) in the other zone (14), and there is an outlet (16) in the other zone (14), such that the outlet (16) has an outlet (16) The other zone (14) passes through the at least two sheets of material in the manner of acting as an overpressure valve. The package (10) of claim 1, wherein the chamber system (18) comprises at least one chamber (22.1, 22.2) and at least one horizontal seam (20), the horizontal seam (20) being in the package (10) The at least one chamber (22.1, 22.2) extends between the edges (42.1, 42.2, 42.3, 42.4). The package (10) of claim 2, wherein the at least one chamber is encased by a seam having at least two seams (36.1, 36.2, 38.1, 38.2) and at least two passages (26.1, 26.2, 24.1, 24.2) The volume defined by (22.1, 22.2) is arranged such that the paths (26.1, 26.2, 24.1, 24.2) are offset from each other. The package (10) of claim 3, wherein at least one of the at least two passages (26.1, 26.2, 24.1, 24.2) directly adjoins the fill zone (12), and the at least two passages (26.1, 26.2, At least one of 24.1, 24.2) is directly adjacent to the other zone (14). A package (10) according to any one of claims 3 and 4, wherein at least one of the seam arrangements (22.1, 32.2) (36.1, 36.2, 38.1, 38.2) along a line having a vertical component and a horizontal component Extending, and extending relative to the horizontal seam (20) at an angle (30.1, 30.2) of less than 80°, preferably less than 50° and more preferably between 30° and 45°. The package (10) of claim 3 or 4, wherein at least two seams (36.1, 36.2, 38.1, 38.2) are extended at an angle (30.1, 30.2) relative to the horizontal seam (20), At least one seam (36.1, 38.1) extends into the filling zone (12) and at least one other seam (36.2, 38.2) extends into the other zone (14) and the at least two seams (36.1, 36.2, 38.1, 38.2) project in a mirror image with respect to the horizontal seam (20) into the filling zone (12) and the other zone (14). A package (10) according to any one of claims 1 to 4, wherein the outlet (16) is completely cut or die cut or as a slit in the other zone (14). The package (10) of claim 7, wherein the outlet (16) in the form of a slit is at least partially interrupted by the web (48). A package (10) according to any one of claims 1 to 4, wherein the outlet in the other zone (14) is designed to carry the handle (16). The package (10) of any one of claims 1 to 4, wherein the package (10) is produced from a biodegradable material. An vacuum-packed package formed by the package of any one of claims 1 to 4, wherein the product is packaged in a compressed form. A method of producing a package (10) according to any one of claims 1 to 4, comprising the steps of: a) providing at least two overlapping materials joined to each other at at least one edge (42.1, 42.2, 42.3, 42.4) a layer; and b) forming at least one filling zone (12) for containing the product and at least one other zone (14) having at least one outlet (16) by means of the filling zone (12) Between the other zones (14) is introduced at least one chamber system (18) that allows fluid to flow from the filling zone (12) into the other zone (14) and out of the package (10) via the outlet (16) Providing an outlet (16) in the other zone (14), the outlet (16) passing through the at least two materials in such a way that the other zone (14) having the outlet (16) acts as an overpressure valve Slice. The method of claim 12, wherein to form the chamber system (18), at least one horizontal seam (20) is included and at least one comprises at least two seams and at least two passages (26.1, 26.2, 24.1, 24.2) The room where the seams are arranged (30.1, 30.2). The method of claim 12, wherein the outlet (16) in the other zone (14) is die cut or cut. The method of claim 14, wherein the cutting or cutting the outlet (16) produces a cut edge bond. The method of claim 12, wherein the outlet is provided in the other zone (14) in the form of a carrying handle (16). A package (10) according to any one of claims 1 to 4 for transporting and storing a net impregnated with an insecticide.