EP3507207A1

EP3507207A1 - Package of insulating products and process for manufacturing such a package

Info

Publication number: EP3507207A1
Application number: EP17764888.8A
Authority: EP
Inventors: Andreas Unruh; Vincent PATRITI
Original assignee: Saint Gobain Isover SA France
Current assignee: Saint Gobain Isover SA France
Priority date: 2016-08-30
Filing date: 2017-08-29
Publication date: 2019-07-10
Anticipated expiration: 2037-08-29
Also published as: MY191186A; SI3507207T1; FR3055321A1; WO2018042119A1; EP3507207B1; FR3055321B1; AU2017318522A1; CA3033965A1; JP2019524583A; US10994910B2; ES2886967T3; PL3507207T3; DK3507207T3; US20190202614A1; ZA201900895B; KR20190042574A; RU2711164C1

Abstract

This package (8) comprises compressible insulating products (1), each insulating product (1) having a longitudinal axis (X₁), a peripheral surface and first and second ends. The package (8) comprises a stack (6) of at least two modules (5), where each module (5) comprises one row of insulating products (1) arranged side by side in a first direction (D₁). The modules (5) of the stack (6) are superimposed in a second direction (D₂) perpendicular to the longitudinal axes (X₁) of the insulating products (1) and to the first direction (D₁). The package (8) also comprises a cover (7) which encloses the stack (6) by covering five faces (62, 63, 64, 66, 68) of the stack, including the two end faces (62, 64) of the stack, formed by the ends of the insulating products (1) and at least the periphery of the sixth face (61) of the stack.

Description

PACKAGE OF INSULATING PRODUCTS

AND METHOD FOR MANUFACTURING SUCH A PACKAGE

The present invention relates to the packaging of compressible insulating products, especially for their transport or storage. More specifically, the invention relates to a package comprising compressible insulating products in the unitary state in the form of rolls or substantially parallelepiped batches of panels. The invention also relates to a method of manufacturing such a package, and to a palletized assembly comprising such packages.

Fibrous insulation products, such as glass wool or other mineral wool felts, are low density products that occupy a large volume. In order to facilitate their transport and their storage, it is desirable to limit the bulk of these products and to realize palletising loads. For this purpose, the insulating products in the unitary state are conventionally packaged in a compressed state, being coated with a protective envelope generally made of kraft paper or plastic material, the insulating products then being assembled in the form of rows and then positioned on pallets.

A constraint for the packaging is that the deformations generated during compression of the insulating product should not degrade its ability to take up thickness at deconditioning, the insulating qualities of the product being dependent on this thickness recovery. Another constraint is the need to protect the insulating product vis-à-vis the external environment, particularly when it comprises a binder sensitive to the effects of moisture. However, the protective envelope for maintaining the product in the form of a roll, or to collect in a batch a series of panels, does not generally cover the entire external surface of the product and is therefore not sufficient to ensure complete protection against moisture.

EP0220980A1 discloses a package in which a module is formed by juxtaposing several insulating products in a row, and belting the row with a film sealed on itself. Several modules are then superimposed on a pallet and the assembly is assembled by wrapping. A disadvantage of this type of packaging is that even if the rolls or batches of panels are protected by the wrapping film, they are no longer protected, particularly at their ends, once the palletized assembly has been opened or damaged. There is a risk of water infiltration into the insulating product, which can lead to degradation of its insulating properties.

It is to these drawbacks that the invention more particularly intends to remedy by proposing a pack of compressible insulating products making it possible to preserve the quality of the insulating products, particularly in terms of thickness recovery.

For this purpose, the subject of the invention is a pack of compressible insulating products, each insulating product having a longitudinal axis, a peripheral surface and first and second ends, the packet comprising a stack of at least two superimposed modules, where each module includes:

a row of insulating products arranged next to each other, successively in a first direction perpendicular to the longitudinal axes of the insulating products, the insulating products of the row having their longitudinal axes parallel to each other,

a first film which envelops each insulating product of the row in a compressed state of the insulating product, covering the peripheral surface of the insulating product,

a second film which envelops the row of insulating products, covering a part of the peripheral surface of the insulating products of the row, the modules of the stack being superimposed in a second direction perpendicular to the longitudinal axes of the insulating products and at the first direction of each module, the stack comprising two end faces formed by the ends of the insulating products and the main faces and transverse faces which are perpendicular to the end faces, characterized in that the package comprises a cover which envelops the stack of superimposed modules, covering five faces of the stack including both end faces and at least the periphery of the sixth face of the stack. According to one characteristic, each module of a package according to the invention comprises a single row of insulating products arranged next to one another, successively in the first direction perpendicular to the longitudinal axes of the insulating products, the insulating products of the single row having their longitudinal axes parallel to each other. The second film then envelops the single row of insulating products by covering a portion of the peripheral surface of the insulating products of the row.

Throughout this application, the term "cover" when used alone should be understood to mean a cover that envelops a stack of modules. When reference is made to a cover of a palletized assembly, which is distinct from a cover that envelops a stack of modules, it is always specified that it is an "outer cover".

In the context of the invention, the insulating products may be rolls. Alternatively, the insulating products may be batches of several previously assembled panels, for example by means of a heat-shrinkable film, these batches having a substantially parallelepiped shape and being of a size close to that of the rollers. In the following, reference is often made to rollers, it being understood that the invention is not limited to this particular case.

In the context of the invention, the stack of modules, which corresponds to a module stage in a palletized assembly, is completely covered by the combination of the second film and the cover. Thus, thanks to the invention, we obtain packages of insulating products, intended to form all or part of a floor in a palletized assembly, which are watertight. The stack of modules is enclosed inside a package, formed by the combination of the second film and the cover, which covers all the faces of the stack of modules.

The invention makes it possible to very easily realize palletized sets of rolls or panels, by superposition of several packets according to the invention each corresponding to a stage of the palletised load, while ensuring that the insulating products in each package are protected from moisture or other external contaminants even when opening or damage to the external protection of the palletized assembly, which may be a wrapping film or a stretch or shrink wrap. This is particularly advantageous when the insulating products comprise a binder which is sensitive to moisture, such as a bio-sourced binder, in particular based on saccharides, sugars and / or sugar alcohols. Such palletized assemblies can be stored outside, without any more precaution, without risk of deterioration of the quality of the insulating products and in particular without problem of recovery of thickness. Advantageously, it is possible to subdivide the palletized loads obtained according to the invention into packs of watertight packets, which is convenient especially during unpacking operations.

According to one characteristic of the invention, the second film forms, around the row of insulating products, a sleeve with an axis parallel to the longitudinal axes of the insulating products. More specifically, the row of insulating products comprises two main faces and two transverse faces perpendicular to the ends of the insulating products, and the second film envelops the row of insulating products by extending over the main faces and the transverse faces of the row.

According to an advantageous characteristic, the second film envelops the row of insulating products in a compressed state of the insulating products against each other in the first direction. This compression in the first direction, which comes in addition to the compression of each insulating product provided by the first film, contributes to limiting the size of the packages of insulating products according to the invention.

According to an advantageous aspect, the first film and the second film are plastic films having relatively weak extension properties. In particular, each of the first film and the second film preferably has a stress at 10% elongation greater than 15 MPa, preferably greater than 17 MPa or 20 MPa, in the extrusion direction and in the transverse direction. the extrusion direction. The stress can be measured according to the ISO 527/3 standard, on standard test specimens of film. According to this standard, the elongation of the film is measured for an increasing traction force applied to the film (measured in MPa) and a normalized speed. The compression of each insulating product and the compression of each row of insulating products can thus be obtained and maintained, respectively, by a first single film and a second single film. Preferably, the first film and the second film are of high density polyethylene (HDPE or HDPE in English for high density polyethylene).

According to one characteristic of the invention, the cover has a main axis of deployment which is perpendicular to the longitudinal axes of the insulating products.

Preferably, the cover envelops the stack of superposed modules by covering five faces of the stack, including the two end faces, and covering only a peripheral portion of the sixth face of the stack. In other words, the cover then has an opening at the sixth face of the stack.

In an advantageous embodiment, the cover has an opening at a main face of the stack perpendicular to the second direction. This is the preferred arrangement when the cover has an opening, because the edge of the cover defining the opening is then located on the periphery of a face of the stack where the second film of one of the modules end of the stack creates a flat and continuous surface, which ensures a continuous overlap between the cover and the second film. Preferably, in this embodiment, the edge of the cover and the second film present on this main face of the stack are not linked together, which makes the method of manufacturing the package according to the invention particularly simple , fast and economical, while having a high protection especially against the infiltration of water inside the package through the continuous overlap of the cover and the second film. According to a variant, the edge of the cover and the second film present on this main face of the stack may be bonded together, for example by gluing or welding.

In a less preferred embodiment, when the cover has an opening, the opening of the cover may be located at a transverse face of the stack perpendicular to the first direction. This is the only other option possible when the cover has an opening, because in the In the context of the invention the cover necessarily covers the two end faces of the stack. This arrangement is less advantageous than the previous one, because the edge of the cover delimiting the opening is then located on the periphery of a face of the stack which is formed by curved peripheral sides of the various modules of the stack, which are covered by several separate second films, which does not guarantee a continuous overlap between the cover and the second films. It is then more difficult to seal the package.

In another embodiment, the cover has no opening and covers the six faces of the stack. In this embodiment, the cover can be put in place on the stack of modules in a covering device allowing, after the cover has been deployed around the stack, to seal the material of the cover on itself , in particular by welding, facing the sixth face of the stack.

Preferably, the cover is a stretch cover, formed from a stretchable plastic film sheath, for example low density polyethylene (LDPE or LDPE in English for low density polyethylene). The use of a stretch film sheath makes it possible to ensure good stability and good sealing of the package of insulating products. Advantageously, unlike a heat shrinkable film, the introduction of a stretchable sheath does not require a heat source, because it suffices to mechanically stretch beforehand the material of the plastic film in the transverse direction before enveloping the liner. stack of modules. After removal of the stretched cover on the stack of modules, the tightening of the stretch film material naturally takes place by elasticity, which firmly holds the cover around the stack of modules.

According to a variant, in a less preferred embodiment, the cover may be a retractable cover, formed from a sheath of heat-shrinkable plastic film, for example heat-shrinkable polyethylene.

According to one aspect of the invention, the second film is a plastic film having a tensile strength higher than that of the plastic film constituting the cover. For example, the second film may be of high polyethylene density (HDPE), while the plastic film constituting the cover is made of low density polyethylene (LDPE).

In the context of the invention, each row advantageously comprises a number of insulating products of between 2 and 10.

Another object of the invention is a palletized assembly comprising a pallet, at least two packages of compressible insulating products as described above which are superimposed on one another and on the pallet with the longitudinal axes of the insulating products. perpendicular to the pallet, and means for holding packages on the pallet.

In one embodiment, the means for holding the packages on the pallet comprise an outer cover. According to a preferred variant, the outer cover is a stretch cover, formed by drawing at the periphery of the packets of a stretchable plastic film sheath, for example a low-density polyethylene (LDPE) sheath. According to a less preferred variant, the outer cover is a retractable cover, formed by retraction at the periphery of the packets of a sheath of heat-shrinkable plastic film, for example a heat-shrinkable polyethylene sheath.

In another embodiment, the means for holding packages on the pallet comprise a wrapped film at the periphery of the packets, for example a polyethylene film 20 to 30 microns thick having a mechanical drawing capacity greater than 200 %, in particular of the order of 250%. Conventionally, a cap is also provided on the top of the charge formed by the packets, for example a relatively thick polyethylene film, at least 75 microns thick.

Another object of the invention is a method of manufacturing a package comprising compressible insulating products, each insulating product having a longitudinal axis, a peripheral surface and first and second ends, the method comprising steps in which:

each insulating product is enveloped by means of a first film which covers the peripheral surface of the insulating product and which keeps the insulating product in a compressed state; a row of insulating products is formed by placing several insulating products provided with the first film one beside the other, successively in a first direction perpendicular to the longitudinal axes of the insulating products, the insulating products of the row having their longitudinal axes parallel to each other; ;

- A module is formed by wrapping the row of insulating products with a second film, which covers a portion of the peripheral surface of the insulating products of the row and which keeps the insulating products of the row next to the others according to the first direction;

a stack of modules is formed by superposing at least two modules in a direction perpendicular to the longitudinal axes of the insulating products and in the first direction of each module;

- The package is formed by wrapping the stack of modules with a cover that covers at least five faces of the stack including the two end faces of the stack formed by the ends of the insulating products.

Another object of the invention is a method of manufacturing a palletized assembly comprising compressible insulating products, each insulating product having a longitudinal axis, a peripheral surface and first and second ends, the method comprising steps in which:

each insulating product is enveloped by means of a first film which covers the peripheral surface of the insulating product and which keeps the insulating product in a compressed state;

a row of insulating products is formed by placing several insulating products provided with the first film one beside the other, successively in a first direction perpendicular to the longitudinal axes of the insulating products, the insulating products of the row having their longitudinal axes parallel to each other; ;

- A module is formed by wrapping the row of insulating products with a second film, which covers a portion of the peripheral surface of the insulating products of the row and which keeps the insulating products of the row next to the others according to the first direction; a stack of modules is formed by superposing at least two modules in a direction perpendicular to the longitudinal axes of the insulating products and in the first direction of each module;

a package is formed by wrapping the stack of modules with a cover covering at least five faces of the stack including the two end faces of the stack formed by the ends of the insulating products;

at least two packets are superimposed on each other and on a pallet with the longitudinal axes of the insulating products perpendicular to the pallet;

the packages and the pallet are assembled using means for holding the packages on the pallet.

In the context of a method according to the invention, the row of insulating products can be formed in a stacker. In addition, the wrapping of the row of insulating products using the second film can be achieved by belting so as to form a sleeve of axis parallel to the longitudinal axes of the insulating products, the second film being deployed around the row according to the first direction. For the belting of the row of insulating products using the second film, the belting device advantageously comprises means for relative displacement of a film strip around the row of insulating products.

Furthermore, in the context of a process according to the invention, the wrapping of the stack of modules using the cover is advantageously carried out by drawing a sheath of stretchable plastic film, for example of low polyethylene density (LDPE), the sheath being deployed around the stack in a direction perpendicular to the longitudinal axes of the insulating products. Alternatively, in a less preferred embodiment, the wrapping of the stack of modules using the cover can be achieved by retracting a sheath of heat-shrinkable plastic film.

In one embodiment of the invention, the packages and the pallet are assembled using an outer cover obtained by stretching or retracting a sheath of plastic film, the sheath being deployed around the packages and the pallet in a direction parallel to the longitudinal axes of the insulating products. In another embodiment of the invention, the packages and the pallet are assembled by wrapping, using a wrapping film which is deployed around the packages and the pallet in a wrapping direction parallel to the longitudinal axes. insulation products.

The characteristics and advantages of the invention will appear in the following description of embodiments of a package of insulating products and a palletized assembly according to the invention, given solely by way of example and made with reference to in the accompanying drawings in which:

- Figures 1 to 5 are schematic perspective views showing successive steps of a method of manufacturing a roll of packs according to the invention;

FIG. 6 is a schematic exploded perspective view of a first embodiment of a palletized assembly comprising two packets according to the invention;

- Figure 7 is a schematic cross section along the plane VII of Figure 6;

- Figure 8 is a view similar to Figure 6 for a second embodiment of a palletized assembly comprising two packs according to the invention; and

FIG. 9 is a schematic transverse section along plane IX of FIG. 8.

In Figure 1 is schematically illustrated a roll 1, formed by winding an insulation tape compressible fibrous material, such as glass wool or rock wool. This roll has a longitudinal axis Xi, a peripheral surface 15 and two ends 12 and 14. Conventionally, during the winding of the roll 1, the fibrous material has been compressed, with a compression ratio adapted to ensure when the size of the insulation strip is minimized in the wound state and the insulation strip regains its thickness and its insulating characteristics in the unwound state. The roll 1 has also been wrapped with a first film 2 which holds the roll in a compressed state, covering the peripheral surface 15 of the roll. For example, the roll 1 has a diameter at the level of its ends 12, 14 of the order of 300 to 600 mm, and each roller has a length parallel to the axis Xi of the order of 800 to 1250 mm.

As shown in Figure 2, a row 3 of rollers is formed by arranging several rollers 1 next to each other successively in a first direction Di perpendicular to the longitudinal axes Xi of the rollers, with their axes Xi parallel to each other. For example, the row 3 has a length in the first direction Di of the order of 900 to 3000 mm, which corresponds to a row of three to six rolls depending on the diameter of the rollers. In the example shown, each row 3 comprises four juxtaposed rollers 1 and has a length in the first direction Di of the order of 1600 mm.

To form a module 5, which has a single row 3 of rollers 1, the row 3 is wrapped with a second film 4, with application of a compression of the rollers 1 of the row against each other in the direction of the arrows Ci of FIG. 3, which corresponds to the first direction D 1, the compression being maintained by the wrapping with the second film 4. The wrap with the second film 4 may be made in a belting device, for example in which the film 4 is deployed around the row 3 in the first direction Di, by relative movement of a film strip 4 and the row 3 while applying the compression Ci in the first direction Di. Advantageously, the second film 4 extends from one end to the other of the rollers 1, covering the main faces 31, 33 and transverse 36, 38 of the row 3 and leaving the ends 12 and 14 free. each roll. The compression applied in the direction of arrows Ci is for example of the order of 1, 5 tons. As can be seen in FIG. 3, as a result of such compression, the rollers 1 have an oval cross-section whose largest axis is along the second direction D ₂ perpendicular to the longitudinal axes Xi of the rollers and in the first direction Di. For example, the module 5 has a length in the first direction Di of the order of 1100 to 1250 mm.

Preferably, the first film 2 and the second film 4 are each formed of a plastic tape that is not very extensible, for example a ribbon high density polyethylene (HDPE), so that each film 2 and 4 keeps the rollers 1 of the row in their compressed state.

As shown in FIG. 4, a plurality of modules 5 are superposed, in the second direction D ₂ perpendicular to the longitudinal axes Xi of the rollers and in the first direction Di of each module, so as to form a stack 6. The stack 6 comprises two end faces 62, 64, which are formed by the ends 12, 14 of the rollers 1, and main faces 61, 63 and transverse 66, 68, which are perpendicular to the end faces 62, 64. In the example represented, the stack 6 comprises three superimposed modules 5 in the second direction D ₂ .

A package 8 of rollers according to the invention is obtained by wrapping the stack 6 of modules with a cover 7, so that the cover 7 covers five faces of the stack 6 including the two end faces 62, 64 and the cover 7 is folded over the periphery of the sixth face of the stack 6, which in the example of Figure 5 is the lower main face 61 of the stack. Thus, an edge 72 of the cover 7 is positioned facing the lower main face 61 of the stack 6 and covers the periphery of this face 61, while delimiting an opening 71 at this lower main face 61. The opening 71 is centered on an axis Y ₇ perpendicular to the longitudinal axes Xi of the rollers 1 of the stack 6.

Preferably, the cover 7 is a stretch cover, formed from a stretchable plastic film sheath, for example low density polyethylene (LDPE). The wrapping of the stack 6 with the cover 7 is then carried out, in a known manner, in a stretch-wrapped packaging device. In FIG. 5, the vertical direction of the packaging device corresponds to the direction of the Y axis ₇ of the cover 7. In this example, the cover 7 is deployed in the second direction D ₂ around the stack 6.

Conventionally, in the packaging device, the plastic stretch film sheath is stored around a spool, being pleated into a bellows or accordion tube shape. The packaging device comprises a welding station configured to weld the sheath forming a welded joint. After welding, the sheath is cut transversely in a cutting station to make a cover 7 independent of the coil and closed at its upper part.

The pleated cover 7 is then stretched in a horizontal plane parallel to the weld zone of the upper part of the cover 7, which is the plane perpendicular to the second direction D ₂ , while being positioned above the upper main face 63 of the stack 6. The cover 7 is then unfolded, and deposited on and around the main face 63 and the faces 62, 64, 66, 68 of the stack 6 following a vertical movement up and down according to the second direction D ₂ .

At the end of the foaming operation, the lower end of the cover 7 is folded under the lower main face 61 of the stack 6, for example using drawing shoes. The tightening of the cover 7 is then effected by elasticity, which firmly holds the cover 7 around the stack 6 of modules. The edge 72 of the cover 7 positioned opposite the lower main face 61 then covers the periphery of this face 61, while delimiting the opening 71.

This gives a package 8 comprising twelve rolls, which is waterproof because the package, formed by the combination of the cover 7 and the second film 4 of the end module closest to the opening 71, covers all six faces of the stack 6 of modules. The continuous overlap between the cover 7 and the second film 4 at the periphery of the main face 61 of the stack 6, where the second film 4 of the end module creates a flat and closed surface, ensures that it There is no water inlet inside the package 8. By way of example, the package 8 has a length parallel to the axes Xi of the rollers of the order of 800 to 1250 mm, a length according to the first direction Di of the order of 1 100 to 1250 mm, and a length in the second direction D ₂ of the order of 1200 mm. Thus, it is possible to side by side two pallets of dimensions 1200 to 1250 mm by 1200 to 1250 mm, supporting packets 8 superimposed, in a truck having a width of the order of 2400 to 2500 mm. Of course, the dimensions of the rollers 1, the number of rollers 1 and the compression level Ci can be adapted so that the dimensions packages 8 correspond to all conventional dimensions of pallets and means of transport.

From packages 8 of rollers according to the invention as described above, it is possible to simply produce palletized assemblies. Two examples of palletized assemblies are illustrated in the first and second embodiments shown in FIGS. 6 to 9.

In the first embodiment shown in Figures 6 and 7, the palletized assembly 16 comprises a pallet 13 and two packs 8 of rollers. The pallet 13 is preferably formed of two trays or wooden grating spaced apart by spacers defining a space sufficient for the introduction of forks of handling equipment. Advantageously, the lower plate of the pallet 13 allows easy movement on a raceway and stacking loads. The two packages 8 are superimposed on each other and on the pallet 13 in a configuration where the rollers 1 are "standing" on the pallet 13, that is to say with their longitudinal axes Xi perpendicular to the pallet . As can be seen in FIG. 6, this corresponds to a configuration of each pack 8 pivoted by 90 ° with respect to the configuration of FIG. 5. The opening 71 of the cover 7 of each pack 8 is then arranged laterally with respect to the palletized assembly 16, each cover 7 can then be considered as a "horizontal" cover in the palletized assembly 16.

For the maintenance of packages 8 on the pallet 13, the palletized assembly 16 comprises an outer cover 9, which can be considered as a "vertical" cover in the palletized assembly 16. Preferably, the outer cover 9 is a stretchable cover formed by stretching a sheath of plastic film around the periphery of the packages 8. The introduction of the outer cover 9 around the packs 8 and the pallet 13 is carried out, in a known manner, in a packaging device. stretch cover. In FIGS. 6 and 7, the vertical direction of the packaging device corresponds to the direction of the main axis Xg of the outer cover 9. In this example, the outer cover 9 is deployed around the packs 8 and the pallet 13 in a direction parallel to the longitudinal axes Xi of the rollers. Advantageously, the device used for the establishment of the outer cover 9 "vertical" around the packages 8 and the pallet 13 may be the same device as that used for the introduction of the covers "horizontal" 7 on the Stacking 6. In this case, the manufacturing facility of the palletized assemblies may comprise means of rotation 90 ° packets 8 after the establishment of their cover 7 and before their superposition on the pallet 13.

The introduction of the outer cover 9 around the packs 8 and the pallet 13 is similar to that of the cover 7 around the stack 6. Thus, the outer pleated cover 9 is stretched in a parallel horizontal plane to the weld zone of the upper part of the outer cover, which is the plane perpendicular to the longitudinal axes Xi of the rollers. The outer cover 9 is then unfolded, and deposited on and around the packs 8 and the pallet 13 following a vertical movement up and down in a direction parallel to the longitudinal axes Xi of the rollers. At the end of the shading operation, the lower end of the outer cover 9 is folded under the pallet 13. The tightening of the outer cover 9 takes place by elasticity, which firmly holds the outer cover 9 around the charge. The outer cover 9 provides weather protection to the palletized assembly 16.

In the second embodiment of a palletized assembly shown in Figures 8 and 9, the elements similar to those of the first embodiment bear identical references. The palletized assembly 17 according to the second embodiment differs from the first embodiment in that the maintenance of the packs 8 on the pallet 13 is not ensured with the aid of an outer cover 9, but by wrapping with the using a film 10 which is deployed around the packs 8 and the pallet 13 with a displacement in a direction parallel to the longitudinal axes Xi of the rollers.

The placing of the wrapping film 10 around the packages 8 and the pallet 13 is carried out, in a known manner, in a wrapping device. In Figures 8 and 9, the vertical direction of the wrapping device corresponds to the direction of the central axis X10 of the wrapping. The wrapping device may be, for example, a rotating ring machine, comprising a unwinding and stretching system of the wrapping film 10 and a setting system. place a 1 1 cap on the top of the load. By way of example, the wrapping film 10 may be a polyethylene film 20 to 30 microns thick, having a stretching capacity of 250%, and the cap 11 may be based on a polyethylene film. relatively thick, at least 75 microns thick.

The wrapping operations are carried out in a suitable manner to provide protection against bad weather to the palletized assembly 17. For this purpose, the outermost layer of wrapping film 10 is deployed from bottom to top, from so that the highest positioned layer is always overlapped from above from the outside, with an arrangement similar to roof tiles, as shown schematically in Figure 9. Such an arrangement prevents water from entering. Inside the palletized assembly 17. In a known manner, the numbers of revolutions and the percentages of recovery during wrapping are adjusted on a case by case basis.

By way of example, a wrapping cycle takes place in the following manner: when the assembly comprising the packs 8 disposed on the pallet 13 is in place in the wrapping device, a stabilizing plate is lowered to come block the formed charge by the packets 8, and the wrapping starts from the bottom, with a few turns that trap the pallet 13. From below, the ring is progressively reassembled, a station being made at the junction between the two packets 8 of the charge. When approaching the top of the load, the stabilizing plate is erased, which is possible because the load is self-stabilized by the film already in place. A length of cap film 1 1 is then unwound, at the desired length above the load, the tray is lowered and the cap is cut. The wrapping then resumes downwards on a few turns, so that the cap 1 1 is surrounded by a few turns of the wrapping film 10, which is finally welded on itself and cut. In order to ensure protection against the weather, as much as possible avoids any overlap between the turns of the film 10 which are bandaged downwards around the cap 1 January.

The invention is not limited to the examples described and shown. In particular, the values given in the examples above for the dimensions of the rolls and the packets are purely illustrative, it being understood that the Pack sizes according to the invention can be adapted, in particular to be compatible with all dimensions of pallets and means of transport. In addition, the invention has been described on the basis of examples involving rolls as insulating products. Alternatively, as mentioned above, the invention is also applicable to other elongated insulating products, such as batches of panels previously assembled, having a substantially parallelepiped shape. Furthermore, the invention can be implemented with materials of films and covers different from those described above.

Claims

1. Package (8) of compressible insulating products (1), each insulating product (1) having a longitudinal axis (Xi), a peripheral surface (15) and first and second ends (12, 14),

the package (8) comprising a stack (6) of at least two superimposed modules (5), where each module (5) comprises:

a row (3) of insulating products (1) arranged next to one another, successively in a first direction (Di) perpendicular to the longitudinal axes (Xi) of the insulating products, the insulating products (1) of the row (3) ) having their longitudinal axes (Xi) parallel to each other,

a first film (2) which envelops each insulating product (1) of the row (3) in a compressed state of the insulating product, covering the peripheral surface (15) of the insulating product,

a second film (4) enclosing the row (3) of insulating products, covering a portion of the peripheral surface (15) of the insulating products of the row (3),

the modules (5) of the stack (6) being superimposed in a second direction (D ₂ ) perpendicular to the longitudinal axes (Xi) of the insulating products and in the first direction (Di) of each module, the stack (6) having two end faces (62, 64) formed by the ends (12, 14) of the insulating products and main faces (61, 63) and transverse faces (66, 68) which are perpendicular to the end faces (62, 64). , 64),

characterized in that the package (8) comprises a cover (7) which surrounds the stack (6) of superimposed modules (5), covering five faces (62, 63, 64, 66, 68) of the stack ( 6) including both end faces (62, 64) and at least the periphery of the sixth face (61) of the stack (6).

2. Package according to claim 1, characterized in that the stack (6) of modules (5) is completely covered by the combination of the second film (4) and the cover (7).

3. Package according to any one of the preceding claims, characterized in that the second film (4) forms, around the row (3) of insulating products, an axis sleeve (X ₄ ) parallel to the longitudinal axes (Xi) of the insulating products.

4. Package according to any one of the preceding claims, characterized in that the cover (7) has a main axis (Y ₇ ) perpendicular to the longitudinal axes (Xi) insulating products.

5. Package according to any one of claims 1 to 4, characterized in that the cover (7) has an opening (71) at a main face (61) of the stack (6) perpendicular to the second direction (D ₂ ).

6. Package according to any one of claims 1 to 4, characterized in that the cover (7) covers the six faces (61, 62, 63, 64, 66, 68) of the stack

(6).

7. Package according to any one of the preceding claims, characterized in that the cover (7) is a stretch cover formed from a stretchable plastic film sheath.

8. Package according to any one of the preceding claims, characterized in that the second film (4) is a plastic film having a tensile strength higher than that of the plastic film constituting the cover (7).

9. Package according to any one of the preceding claims, characterized in that the second film (4) envelops the row (3) of insulating products in a compressed state (Ci) insulating products against each other in the first direction (Di).

10. Palletized assembly (16; 17) comprising:

a pallet (13),

at least two packages (8) according to any one of the preceding claims, which are superimposed on each other and on the pallet (13) with the longitudinal axes (Xi) of the insulating products perpendicular to the pallet (13 )

- means (9; 10, 1 1) for holding the packs (8) on the pallet (13).

1 1. Palletized assembly according to claim 10, characterized in that the holding means comprise an outer cover (9) formed by drawing a sheath of stretchable plastic film at the periphery of the packs (8).

12. palletized assembly according to claim 10, characterized in that the holding means comprise a film (10) wrapped around the periphery of the packets (8).

A method of manufacturing a package (8) comprising compressible insulating products (1), each insulating product (1) having a longitudinal axis (Xi), a peripheral surface (15) and first and second ends (12, 14), the method comprising steps wherein:

each insulating product (1) is enveloped by means of a first film (2) which covers the peripheral surface (15) of the insulating product and which keeps the insulating product (1) in a compressed state;

a row (3) of insulating products is formed by placing several insulating products (1) provided with the first film (2) next to one another successively in a first direction (Di) perpendicular to the longitudinal axes (Xi) of the products insulators, insulating products (1) of the row (3) having their longitudinal axes (Xi) parallel to each other;

a module (5) is formed by wrapping the row (3) of insulating products with a second film (4), which covers a portion of the peripheral surface (15) of the insulating products of the row (3). ) and which keeps the insulation products (1) of the row (3) next to each other in the first direction (Di);

- forming a stack (6) of modules by superimposing at least two modules (5) in a direction (D ₂₎ perpendicular to the longitudinal axes (X) of the insulation and to the first direction (Di) of each module;

the package (8) is formed by wrapping the stack (6) of modules with a cover (7) covering at least five faces (62, 63, 64, 66, 68) of the stack (6) including the two end faces (62, 64) of the stack formed by the ends (12, 14) of the insulating products (1).

A method of manufacturing a palletized assembly (16; 17) comprising compressible insulating products (1), each insulating product (1) having a longitudinal axis (Xi), a peripheral surface (15) and first and second ends (12, 14), the method comprising steps wherein: each insulating product (1) is enveloped by means of a first film (2) which covers the peripheral surface (15) of the insulating product and which keeps the insulating product (1) in a compressed state;

a package (8) is formed by wrapping the stack (6) of modules with a cover (7) covering at least five faces (62, 63, 64, 66, 68) of the stack (6) including both end faces (62, 64) of the stack formed by the ends (12, 14) of the insulation products (1);

at least two packets (8) are superimposed on each other and on a pallet (13) with the longitudinal axes (Xi) of the insulating products perpendicular to the pallet (13);

the packs (8) and the pallet (13) are assembled using holding means (9; 10, 1 1).