EP3860934A1

EP3860934A1 - Flexible container for packaging waste

Info

Publication number: EP3860934A1
Application number: EP19774128.3A
Authority: EP
Inventors: Franck MILHEM
Original assignee: Linerbenne SAS
Current assignee: Linerbenne SAS
Priority date: 2018-10-05
Filing date: 2019-10-01
Publication date: 2021-08-11
Also published as: FR3086932A1; JP2022508585A; CA3114809A1; JP7483727B2; WO2020070160A1; KR20210090161A; FR3086932B1; US20220041371A1

Abstract

A flexible container (1) for packaging waste, comprising: • an outer casing (2) forming the outer surface (5) of the container and having, in a top part, an opening (13) that can be opened or closed, • an inner casing (3) delimiting an inner space (V) of the container for receiving and accommodating the waste, arranged inside the outer casing (2), the inner casing (3) comprising, in a top part, an opening (51) that can be opened or closed by means of a closure system (510) attached to the inner casing, and • at least one reinforcing strip (40) superimposed at least partially on and attached to the closure system (510) and to the inner casing.

Description

FLEXIBLE CONTAINER FOR THE PACKAGING OF WASTE

Field of the invention

The present invention relates to the field of packaging waste. The term "waste" is used within the meaning of European Directive 2006/12 / EC of April 5, 2006 and designates any substance or object which falls under the categories listed in Annex I to this Directive, which the holder discards or which he intends or has the obligation to dispose of.

It relates more particularly to the conditioning of waste resulting from asbestos-removal work for buildings or public works.

It thus relates to a container, in particular flexible, for packaging waste, as well as to a process for packaging waste using such a container.

PRIOR ART AND OBJECTIVES OF THE INVENTION

In the context of the packaging of waste, in particular asbestos, there is known patent application EP 3 133 033 relating to a flexible packaging of solid waste with a capacity greater than 5 m ³ , consisting of a mechanically resistant outer casing and an inner casing dustproof, each comprising a cover which can be closed on a pocket by closing means so as to close the packaging in a leaktight manner using a system of flaps extending from the upper peripheral edge of the packaging, interposed between the outer envelope and the inner envelope and covering the means for closing the inner envelope.

Such packaging is well suited for homogeneous waste of the milled type, polluted soil or steelworks dust, with a small particle size.

In the field of the invention, it is essential to be able to guarantee the leaktightness of the waste container when loading the waste at a collection site, during transport and during unloading at a storage site, while controlling costs. Manufacturing.

The flexible containers conditioning the waste are placed in a metal skip during their loading and transport. Some skips can be unloaded, on the storage site, from the transport truck, in particular using an articulated arm of the Ampliroll® type, requiring a slight inclination during dumping, which allows to preserve the integrity and therefore the tightness of the container. However, generally, the metal container with a capacity of 32T housing the flexible container remains attached to the transport truck and a tilting of the container to unload the flexible container with the waste is carried out. In the latter case, the tilt angle is large, in other words the inclination of the bucket during dumping is large, which results in sudden unloading and greatly increases the risk of damaging the flexible container.

Consideration has been given to strengthening certain parts of the container envelopes and / or increasing the thickness of the container envelopes at least in places. Such solutions can be implemented but are not completely satisfactory and further increase the cost of the containers.

Another problem in waste management, particularly asbestos, arises on construction sites. The waste is often made of scrap metal and large blocks, or earth mixed with other stone-like materials, concrete blocks, pieces of fiber cement pipe, which increases the risk of tearing or piercing the containers and ultimately of destroy the seal. It is thus necessary, before packaging the waste in the containers, to pass it to the screening to sort it and / or break the excessively bulky waste into smaller pieces, which generates significant processing costs.

There is thus a need to benefit from flexible containers making it possible to package and transport, from a collection site to a storage site, in a resistant and waterproof manner, waste, in particular asbestos waste or other waste, in particular composed of large blocks and scrap, without requiring screening and / or reduction in size of waste by breaking before packaging.

Summary of the invention

The present invention manages to solve all or part of this need and relates to a flexible container for packaging waste comprising:

- an outer casing forming the outer surface of the container and having, in an upper part, an opening which can be opened or closed,

an interior envelope delimiting an interior volume of the container for receiving and housing the waste, disposed inside the exterior envelope, the interior envelope comprising, in an upper part, an opening which can be opened or closed using a closure system fixed on the inner envelope, and - At least one reinforcing strip at least partially superimposed and fixed to the closure system and to the inner envelope.

Thanks to the invention, there is a resistant container. In particular, the presence of the reinforcement strip (s) makes it possible to reinforce the container at the location of the fixing between the closure system and the inner envelope and to increase the mechanical resistance, force at break and elongation.

Preferably, said at least one reinforcing strip is interposed between the closure system and the inner envelope. Such stacking can significantly increase the resistance of the container in this area.

Alternatively or additionally, the container may comprise at least one reinforcing strip arranged under the inner envelope.

The opening of the inner envelope may have at least one edge. In this case, the container may include at least one reinforcing strip on either side of said at least one edge of the opening.

The closure system preferably includes a zipper. The zipper is advantageously made with a zipper sewn on either side on a strip of fabric made of polyester, about 3 cm on a side, for example.

The closure system can be attached to the inner envelope by sewing. In this case, the same seam can be used both for fixing the closure system and the reinforcement strip (s). A plurality of rows of seams, for example parallel to each other, can make it possible to fix the closure system and, simultaneously, the reinforcement strip (s).

The closure system of the inner envelope is preferably fixed to a top wall of the inner envelope.

Said at least one reinforcing strip may comprise a composite material with a fibrous reinforcement comprising fibers chosen from the group consisting of glass fibers, carbon fibers, aramid fibers, natural fibers and their mixtures, preferably glass fibers. The fibrous reinforcement is for example woven. Said at least one reinforcing strip may comprise at least one polymer chosen from the group consisting of a polyolefin, polyethylene terephthalate (PET), polyester, preferably PET.

Said at least one reinforcing strip may be coated, on one of its faces or on both of its faces, with an adhesive, for example a synthetic rubber resin. The presence of the adhesive can make it possible to improve the resistance of the strip against the closure system and / or the inner envelope before fixing, in particular by sewing.

The thickness of the reinforcing strip may be between 0.10 mm and 0.20 mm, preferably between 0.14 mm and 0.18 mm, for example be equal to 0.16 mm.

The tensile strength of the reinforcing strip can be about 550N / inch.

The outer shell may include a closure system which may include a zipper. The closure system of the outer envelope may be present on a top wall of the outer envelope. In the latter case, and in the case where the inner casing also includes a zipper, the zippers of the inner casing and of the outer casing have, for example, U-shaped profiles of opposite orientation.

The container may include at least one flap interposed between the outer envelope and the inner envelope. The container can then comprise at least a first fixing zone and a second fixing zone respectively disposed on either side of the closure system, the flap (s) being attached to the inner envelope in at minus the first fixing zone, the flap (s) and / or the inner envelope being provided with fixing means so as to be able to fix, in the second fixing zone, the flap (s) to the 'inner envelope after closing it. Since the flap or flaps are fixed on either side of the closure system, it (s) cover (s) thereof, improving the tightness of the inner envelope at the closure system.

The inner envelope advantageously comprises an upper wall, a lower wall and at least one side wall connecting the upper wall and the lower wall.

In a particular embodiment, the flap (s) cover only the upper wall of the inner envelope. In this case, the first and second attachment zones are located on the upper wall, one of the first and second attachment zones being for example at the junction between the upper wall and said at least one side wall.

In another embodiment, the flap (s) at least partially cover the side wall (s) and the first or second fixing zone is located in a lower part of the inner envelope.

In this case, the first fixing zone is for example located in the lower part of the inner envelope. The flap (s) is (are) preferably welded to the inner envelope in this first attachment zone. Alternatively, it can be glued, for example by means of a double-sided adhesive strip.

The second fixing zone can be located on the upper wall of the inner envelope, the fixing means in this second fixing zone comprising in particular an adhesive, preferably a double-sided adhesive strip. The fastening means can be attached to the flap (s) along at least one edge thereof.

The first attachment zone can be located in a lower portion of said at least one side wall, in particular at the junction between said at least one side wall and the bottom wall, the flap (s) then covering the total height of the or side wall (s). In this case, the container is provided, over its entire height, with a triple layer formed by the outer envelope, the inner envelope and the flap (s). This increases the lateral resistance of the container.

The container may include a third fixing zone for fixing between said at least one flap and the inner envelope, the third fixing zone being on said at least one side wall, in particular in a central portion of the inner envelope. The fixing in this third fixing zone is done for example using an adhesive, for example at least one double-sided adhesive strip attached to the flap and / or the inner envelope.

The container may also include a fourth fixing zone for fixing between said at least one flap and the inner envelope, the fourth fixing zone being located on said at least one side wall in an upper part of the inner envelope. The attachment in this fourth attachment zone is carried out for example using an adhesive, for example at least one double-sided adhesive strip attached to the flap and / or the inner envelope.

The presence of a third and possibly a fourth fastening zones makes it possible to provide hold to the container, facilitating its loading. Other attachment zones can be added without departing from the scope of the invention.

The inner envelope has, in one embodiment, a substantially parallelepiped shape, the inner envelope comprising four side walls, the container comprising four flaps covering at least partially, preferably completely, the side walls. "Upper part" means a part situated above half the total height of the container or envelope. "Lower part" means a part located below half the total height of the container or envelope.

References to a part or wall or element "upper" or "lower" are made by a visitor who observes the container when it is placed on the ground in its position of loading waste.

The outer envelope may have a substantially parallelepiped shape, the outer envelope having an upper wall, a lower wall connected to each other by four side walls.

The flap (s) may not cover the bottom wall of the inner envelope.

The flap (s) may have a fold to cover a junction between the upper wall and the side wall (s) of the inner envelope, this junction forming the periphery of the upper wall of the inner envelope.

At least one flap can be fixed to the outer envelope in at least one fixing zone, in particular in two fixing zones, in particular by adhesive, for example by at least one double-sided adhesive strip, which can be attached to the flaps and / or the outer casing. Such a fixing zone can be located in a lower and / or upper part of the outer casing, on at least one side wall of the latter.

The outer envelope may comprise at least one polymer material, comprising in particular polypropylene (PP), in particular in the form of woven material, being for example made of PP fabric. It advantageously has mechanical resistance properties to resist tearing. It can include thicker zones than others or include reinforcements, so as to locally strengthen the mechanical resistance properties. In particular, it may include reinforcements at the edges of the front and rear walls, made for example essentially of PP. It can have a basis weight of between approximately 190 g / m ² and 300 g / m ² , in particular between 200 g / m ² and 270 g / m ² , depending on the dimensions of the outer envelope. The outer envelope preferably has a parallelepiped shape. The tensile strength, measured according to standard ASTM D638, in the warp direction can be between 180 kg _f and 240 kg _f approximately, that is to say approximately 1765 N and 2355 N. The tensile strength, measured according to standard ASTM D638 , in the weft direction can be between 170 kg _f and 240 kg _f approximately, or about 1665 N and 2355 N. The elongation, measured according to standard ASTM D638, can be between 18 and 20% approximately, in the weft or warp direction.

The inner envelope may comprise at least one polymeric material, comprising in particular polyethylene (PE), in particular a PE film or a PE weaving. It advantageously has a seal against dust, emissive and / or powdery materials, air and water. The inner envelope preferably has walls substantially parallel to the respective walls of the outer envelope, in the immediate vicinity thereof, within the container and comprises in particular a front wall, a rear wall, a lower wall, an upper wall and two side walls arranged longitudinally. These different walls together define the interior volume of the interior envelope, corresponding to the interior volume of the container. The inner envelope preferably has a parallelepiped shape. The thickness of the walls of the inner envelope can be between approximately 200 mhi and 400 mhi, in particular between 200 mih and 350 mih. A layer, in particular glued, of expanded PE can be fixed on the interior surface at the level of the lower wall of the interior envelope.

When present, the flap or flaps can be made of polymer material, in particular PE film, of a thickness which can be between approximately 100 mhi and 160 mhi.

The interior volume of the container, in particular of the interior envelope, may be greater than or equal to 3 m ³ , in particular to 5 m ³ , in particular to 10 m ³ , in particular to 16 m ³ , or even to 18 m ³ , in particular to 24 m ³ , even 35m ³ .

The interior volume of the container is defined by that of the interior envelope. The latter may have thicker zones than others, so as to locally strengthen the properties of mechanical resistance, since the waste can move with force within the volumes formed between the straps.

The external envelope can be linked to the internal envelope by at least partial gluing, in particular total gluing between the lower, lateral, front and rear walls of the envelopes, this connection being able to be made via the flap or flaps when present ( s) at the place of the connection.

The opening of the inner envelope can occupy a large part of the upper wall of the inner envelope, and have three edges, including the two longitudinal edges and a third edge, connecting them, near the front or rear wall of the inner envelope, substantially parallel thereto. The three edges of the opening are preferably provided with gear teeth to allow a zipper (or rack) of the opening.

Similarly, the opening of the outer casing can occupy a large part of the upper wall of the outer casing, and have three edges, including the two longitudinal edges and a third edge, connecting them, near the rear wall. or before the outer envelope, substantially parallel thereto. It should be noted that, preferably, the opening of the external envelope comprises, in addition to the two longitudinal edges, a third edge which is opposite to that of the internal opening. Thus, if the opening of the inner casing has a third edge near the front wall, the opening of the outer casing preferably has a third edge near the rear wall. The three edges of the opening of the outer casing are preferably provided with gear teeth to allow a zipper (or rack) of the opening.

The present invention is not however limited to a particular type of closure system and other closure systems can be envisaged without departing from the scope of the invention.

The inner envelope may be provided, on its inner surface, in particular of the side wall or walls, with a plurality of anchor points for tensioners, or elastic cables. These elastic cables can be used to secure the container to a metal skip in which the container would be placed, in the open position of the openings of the outer and inner envelopes, in order to facilitate loading of waste into the container.

Another subject of the invention is, according to another aspect, in combination with the above, a process for conditioning waste comprising the following steps:

- place a flexible container as defined above, in a metal skip,

- open the container by opening the outer envelope and the inner envelope,

- deposit the waste in the interior volume of the container,

- close the container tightly, closing the inner envelope using the closure system, then closing the outer envelope.

The last step includes, when the container has one or more flaps, the fixing of the flap (s) using the fixing means in the second zone of fixing, between the step of closing the inner envelope and that of the outer envelope.

Brief description of the figures

The invention will be better understood on reading the detailed description which follows, examples of non-limiting implementation thereof, and on examining the appended drawing, in which:

FIG. 1 is a schematic perspective view of an example of an outer, closed envelope of a container according to the invention,

FIG. 2 is a schematic perspective view of an example of an inner closed envelope of a container according to the invention,

FIG. 3 is a schematic view from above of the envelope of FIG. 2, closed,

FIG. 4 is a schematic view of the front of the envelope of FIG. 2,

- Figure 5 is a schematic side view of the envelope of Figure 2,

FIG. 6 is an isolated schematic view of a flap of a large side wall of the envelope of FIG. 2,

FIG. 7 is an isolated schematic view of a flap of a small side wall of the envelope of FIG. 2,

FIG. 8 is a schematic view of an example of a container according to the invention, closed, comprising the outer envelope of FIG. 1 and the inner envelope of FIG. 2,

FIG. 9 is a diagrammatic and partial view from above of an example of an inner envelope of a container according to the invention,

FIG. 10 is a schematic view, in partial cross-section, of an example of an inner envelope of a container according to the invention,

FIG. 11 is a view similar to FIG. 3 of another example of an inner envelope of a container according to the invention, and

- Figures 12 and 13 are schematic cross-sectional views, partial, of other example of an inner envelope of a container according to the invention.

Detailed description of embodiments of the invention

In the following description, identical elements or identical functions bear the same reference sign. For the sake of brevity in this description, they do not are not described with reference to each of the figures, only the differences between the embodiments being described.

There is shown in Figure 1 an outer envelope 2 of a container 1 illustrated in Figure 8. The outer envelope 2 defines an outer surface 5 of the container 1. It has an elongated shape along a longitudinal axis X, as visible.

In the example illustrated, the outer casing 2 has a parallelepiped shape, with a lower wall 10 and an upper wall 11, interconnected by four side walls, namely a front side wall 6, a rear side wall 7, two side walls 8 and 9. The bottom 10 and top 11 walls are separated from each other by the side walls 8 and 9. The side walls 6, 7, 8 and 9 define the total height H of the outer casing 2 and therefore of container 1, equal to 1.6 m in this example. The length L of the outer casing 2, ie the length of each side wall 8 or 9, in this example, is 8.8 m. The width / of the outer casing 2 corresponding to the width of the front side wall 6 or rear wall 7 is 2.5 m. The outer casing 2 has an inner surface 12.

We define an upper part 21 of the outer casing 2 and a lower part 22 of the outer casing 2 using a virtual line 20 arranged mid-height of the side walls 5, 6, 7 and 8 of the outer casing 2. The central portion of the outer casing 2 is located approximately at or around the line 20. The upper part 21 includes the upper wall 11 of the outer casing 2. The lower part 22 includes the lower wall 10 of the outer casing 2.

The upper wall 11 is occupied over a large part of its surface by an opening 13 defined by three edges, namely two longitudinal edges 14 and 15, parallel to the longitudinal axis X and a front edge 16 connecting them, near the front side wall 6 in this example, perpendicular to the longitudinal axis X. The opening 13 can be opened or closed using a closure system 130 along the longitudinal edges 14 and 15 and before 16. The system closure 130 of the outer casing 2 comprises a zipper in this example. Ropes 81 of sufficient length are provided to allow an operator to actuate the closure system 130 from the bottom of the container or to facilitate this actuation. The outer casing 2 is made of woven polymer material, in particular PP fabric. The grammage of the outer envelope 2 is, in this example, approximately 270 g / m ² . The outer casing 2 has mechanical strength.

FIG. 2 shows an inner envelope 3 of the container 1 according to the invention. The inner envelope 3 is intended to be placed inside the outer envelope 2 within the container 1. It defines an interior volume V of the container for housing the waste.

The inner envelope 3 is made of polymer material, in particular polyethylene, in particular of a dust-tight material. The inner envelope 3 is produced, in this example, in a PE film, having a thickness of about 350 μm.

The inner casing 3 has a parallelepiped shape similar to that of the outer casing 2. The inner casing 3 has a lower wall 59 and an upper wall 50 as well as four side walls connecting the lower walls 59 and upper 50, including one front side wall 58, a rear side wall 55, two side side walls 56 and 57. The interior envelope 3 has an exterior surface 78 and an interior surface 79. The exterior surface 78 of the interior envelope 3 is facing vis-à-vis the inner surface 12 of the outer casing 2. The inner casing 3 is arranged in the outer casing 2 so that the front side wall 58 is located next to the front side wall 6 and the rear side wall 55 next to the rear side wall 7. The dimensions of the inner envelope 3 are identical, in this example, to those of the envelope external pe 2, with a total height ¾, a width /, · and a length Li, with Hi = H, /, = / and Li = L in this example. They can be different, in particular lower, without departing from the scope of the invention.

An upper part 24 of the inner casing 3 and a lower part 25 of the inner casing 3 are defined using a virtual line 23 disposed halfway up the side walls 55, 56, 57 and 58 of the inner envelope 3. The central portion of the inner envelope 3 is located approximately at or around the line 23. The upper part 24 includes the upper wall 50 of the inner envelope 3. The lower part 25 includes the lower wall 59 of the inner envelope 3.

The upper wall 50 is provided with an opening 51 for the introduction of waste, defined by three edges in this example, namely two longitudinal edges 52 and 53 parallel to the longitudinal axis X. It has a third rear edge 54 connecting edges 52 and 53 and extending near the rear wall 55. The opening 51 is substantially superimposed on the opening 13 of the outer casing 2 within the container 1. The opening 51 can be opened or closed at the with the aid of a closure system 510 disposed along the longitudinal edges 52 and 53 and of the rear edge 54. In this example, the closure system 510 of the inner envelope 3 comprises a zipper, with a slide 511 and a strip of polyester fabric 512 to which the slide 511 is sewn. Ropes 80 of sufficient length are also provided to allow an operator to actuate the closure system 510 from the bottom of the container or to facilitate this actuation.

The container 1 comprises at least one reinforcement strip 40, in the example illustrated several reinforcement strips 40 visible in FIG. 3, arranged on either side of the closure system 510. As can be seen in FIGS. 9 and 10, in more detail, the upper wall 50 of the inner casing 3 is sewn using seams 45, in the form of three rows of seams in this example, to the closure system 510, on either side the corresponding edge of the opening 51. Between the upper wall 50 and the closure system 510 is interposed a reinforcing strip 40, fixed to each of them by the same seam 45. The reinforcing strips 40 are made of film polyethylene terephthalate (PET) reinforced with glass fibers. The presence of these reinforcing bands 40 makes it possible to reinforce the resistance of the inner envelope 3, particularly at the seams 45 which can weaken the inner envelope 3. At least one of the faces 47, or even the two faces 47 and 48, the reinforcing strip or strips 40 is coated with an adhesive, for example a synthetic rubber resin.

It has been calculated that the resistance at the closing system 510 is improved by the presence of the reinforcing strip 40. Without the reinforcing strip, there is thus a tensile force of up to 10.6 kg _f and an elongation that can reach 22%, while with the reinforcement band, we can reach 19.4 kg _f and an elongation of 81%.

The inner envelope 3 is also provided in this example with a plurality of anchor points 60 of elastic cables 61 or tensioners visible in FIGS. 2, 4 and 5. The anchor points 60 are fixed around the entire periphery of the inner surface 79 of the inner casing 3, that is to say on the four front side walls 58, rear 55, and side 56 and 57. The elastic cables 61 can be detachably fixed, in the open position of container 1, on fixing points present on a metal skip housing container 1 during loading of waste. The inner casing 3 comprises reinforcing pieces 98 arranged at each of its angles, as visible in FIGS. 2 and 8 in particular, on its inner surface and / or its outer surface, fixed by welding for example.

The open position of the container 1 corresponds to the open position of the opening 13 and the opening 51, simultaneously. The closed position of the container 1 corresponds to the closed position of the opening 13 and the opening 51, simultaneously. It should be noted that the edge 16 of the opening 13 is located opposite the edge 54 of the opening 51, the first being on the side of the front wall 6 while the second is on the side of the rear wall 55 The opening 13 opens on the side of the rear part 7 while the opening 51 opens on the side of the front part 58.

The container 1 has at least one flap, in this example a plurality of flaps, made in this example of PE film, four in number in this example, namely a rear flap 70, a front flap 71 disposed opposite , and also two side flaps 72 and 73.

The rear 70 and front 71 flaps are identical to each other. The flap 71 is shown in isolation in Figure 7. The side flaps 72 and 73 are identical to each other. The flap 73 is shown in isolation in FIG. 6. The flaps 70 and 71 are of width l _r equal to the width U of the inner envelope 3. The flaps 72 and 73 are of width L _r equal to the length Li of l inner envelope 3. The flaps 70, 71, 72 and 73 are fixed by welding in a first fixing zone 90 of the container 1 formed in this example at the junction between the lower wall 59 of the inner envelope 3 and the side walls 58, 55, 57 and 56 respectively. The weld is advantageously formed continuously over the entire length or width of the inner envelope 3 corresponding to this junction forming an edge. The flaps 70, 71, 72 and 73 thus completely cover the side walls 58, 55, 57 and 56, respectively, over the entire height H, in this example. The container 1 thus comprises, laterally, triple layers formed by the side walls of the inner 3 and outer 2 envelopes between which the respective flaps 70, 71, 72 and 73 are interposed.

The container 1 has a second attachment zone 91, visible in dotted lines in FIG. 8, disposed on the other side of the closure system 510 relative to the first attachment zone 90. The flaps 70, 71, 72 and 73 comprise each of the fixing means 75 constituted in this example by an adhesive, in particular a double-sided adhesive strip for their fixing to the inner envelope 3 in the second fixing zone 91. These fastening means 75 are arranged, as visible in FIGS. 6 and 7 along at least one edge of the flap, parallel to the latter. In FIG. 6, it can be seen that the fixing means 75 are in the form of a parallel strip near the edge 82 of the flap 73. In FIG. 7, it can be seen that the fixing means 75 are in the form of three strips parallel to the three edges 83, 84 and 85 of the flap 71. The edges of the flaps provided with the fixing means 75 are also shown in FIGS. 3, 4 and 5.

The flaps 70, 71, 72 and 73 completely cover the closure system 510 creating a seal at the closure of the inner envelope 3. In this example, the first attachment zone 90 is located on the side walls 58, 55 , 57 and 56 of the inner casing 3 and the second fixing zone 91 is located on the upper wall 50 of the inner casing 3. The flaps 70, 71, 72 and 73 are provided with a fold 92 formed so coming to cover the folded junction, forming an edge, between the side walls 58, 55, 57 and 56 and the upper wall 50, in order to closely match the lines of the inner envelope 3.

Still in the example illustrated, the container 1 also has a third fixing zone 93 and a fourth fixing zone 94 allowing the fixing of each flap 70, 71, 72 and 73 to the corresponding side wall 58, 55, 57 and 56 of the inner casing 3. The fixing zones 93 and 94 are located respectively in a central portion and in an upper portion of each side wall 58, 55, 57 and 56. Double-sided adhesive strips 95 and 96, visible on the Figures 6 and 7, and also in Figure 2 in dotted lines, are respectively arranged on the flaps and / or on the inner envelope 3 to allow attachment between the flap and the corresponding side wall at the level, respectively, of the third zone. fixing 93 and the fourth fixing zone 94.

The flaps are made in this example of polymer material, in particular of polyethylene film, reinforced or not, being of a thickness which may be between 100 μm and 160 μm approximately.

The flaps can also be fixed to the external envelope 2, in particular by adhesive tape, for example in fixing zones situated on a lower part and on an upper part of the side walls 6, 7, 8 and 9 of the external envelope. 2.

The invention is not limited to the examples which have just been described. In particular, it is not outside the scope of the invention if the container does not have flaps. FIG. 11 shows the inner envelope 3 of a container 1 according to the invention which has no flaps. It is also not going beyond the scope of the invention if the flaps cover only part of the height of the side walls of the inner envelope 3.

The reinforcing strip 40 can be placed under the inner envelope 3, as illustrated in FIG. 12. According to this example, there is a stack of the closure system 510, of the inner envelope 3 and finally, under the latter, of the reinforcing strip 40.

It is also possible to have two overlapping reinforcement bands, as for example illustrated in FIG. 13, with a reinforcement band 40 interposed between the closure system 510 and the inner envelope 3 and another reinforcement band 40 under the inner envelope 3. In this example also, the interposed reinforcing strip 40 does not protrude from the closure system 510.

At least two reinforcing strips 40 can be arranged one against the other.

The inner and outer envelopes may have another shape, for example cylindrical with a single circular side wall, or another shape.

Claims

1. Flexible container (1) for packaging waste comprising: an outer envelope (2) forming the outer surface (5) of the container

(1) and having, in an upper part, an opening (13) which can be opened or closed,

an interior envelope (3) delimiting an interior volume (V) of the container (1) for receiving and housing the waste, disposed inside the exterior envelope (2), the interior envelope (3) comprising, in a upper part, an opening (51) which can be opened or closed using a closure system (510) fixed on the inner casing (3), and

at least one reinforcing strip (40) at least partially superimposed and fixed to the closure system (510) and to the inner envelope (3).

2. Container (1) according to claim 1, wherein said at least one reinforcing strip (40) is interposed between the closure system (510) and the inner envelope (3).

3. Container (1) according to claim 1 or 2, wherein the closure system (510) comprises a zipper.

4. Container (1) according to any one of the preceding claims, in which the closure system (510) is fixed by sewing to the inner envelope (3).

5. Container (1) according to any one of the preceding claims, in which said at least one reinforcing strip (40) comprises a composite material with a fibrous reinforcement comprising fibers chosen from the group consisting of glass fibers, carbon fibers, aramid fibers, natural fibers and their mixtures, preferably glass fibers.

6. Container (1) according to the preceding claim, wherein the fibrous reinforcement is woven.

7. Container (1) according to claim 5 or 6, wherein said at least one reinforcing strip (40) comprises at least one polymer chosen from the group consisting of a polyolefin, polyethylene terephthalate (PET), polyester, preferably PET.

8. Container according to any one of the preceding claims, wherein said at least one reinforcing strip (40) is coated, on one of its faces or on both of its faces, with an adhesive.

9. Container (1) according to claim 3 and optionally any one of the preceding claims, wherein the outer casing (2) comprises a zipper, the zippers of the inner casing (3) and the outer casing (2) having U-shaped profiles of opposite orientation.

10. Container (1) according to any one of the preceding claims, comprising at least one flap (70, 71, 72, 73) interposed between the outer envelope (2) and the inner envelope (3), the container ( 1) comprising at least a first fixing zone (90) and a second fixing zone (91) disposed respectively on either side of the closure system (510), the flap (s) (70, 71, 72, 73) being attached to the inner casing (3) in at least the first fixing zone (90), the flap (s) (70, 71, 72, 73) and / or the inner envelope (3) being provided with fixing means (75) in order to be able to fix, in the second fixing zone (91), the flap (s) (70, 71, 72, 73) to the inner envelope ( 3) after closing it.

11. Container (1) according to the preceding claim, in which the first fixing zone (90) is located in the lower part of the inner envelope (3), the flap (s) (70, 71, 72, 73) being welded (s) to the inner casing (3) in this first fixing zone (90).

12. Container (1) according to claim 10 or 11, wherein the inner envelope (3) has an upper wall (50), the second fixing zone (91) being on the upper wall (50) of the inner envelope (3), the fixing means (75) in this second fixing zone (91) comprising in particular an adhesive, preferably a double-sided adhesive strip.

13. Container (1) according to any one of claims 10 to 12, in which the inner envelope (3) comprises a lower wall (59) and at least one side wall (55, 56, 57, 58), the first fixing zone (90) being located in a lower portion of said at least one side wall (55, 56, 57, 58), in particular at the junction between said at least one side wall (55, 56, 57, 58) and the bottom wall (59), the flap (s) (70, 71, 72, 73) then covering the total height (¾) of the side wall (s) (55, 56, 57 , 58).

14. Container (1) according to any one of the preceding claims, in which the inner envelope (3) has a substantially parallelepiped shape, the inner envelope (3) comprising four side walls (55, 56, 57, 58) , the container (1) comprising four flaps (70, 71, 72, 73) covering at least partially, preferably completely, the side walls (55, 56, 57, 58).