MULTILAYER STRETCH FILM

Abstract

The present invention provides a multilayer stretch film comprising at least one core layer arranged between two exterior layers, wherein the thickness of the film is in the range of 5-40 μm, and wherein the film comprises a recycled post-consumer waste polyethylene material at a content of from 10 to 90% by weight based on the total weight of the film.

Claims

1-26. (canceled)

27. A multilayer stretch film comprising at least one core layer arranged between two exterior layers, wherein the thickness of the film is in the range of 5-40 μm, and wherein the film comprises recycled post-consumer waste polyethylene material at a content of from 10 to 90% by weight based on the total weight of the film.

28. The multilayer stretch film according to claim 27, wherein at least one of the exterior layers is free of recycled post-consumer waste polyethylene material.

29. The multilayer stretch film according to claim 27, wherein both exterior layers are free of recycled post-consumer waste polyethylene material.

30. The multilayer stretch film according to claim 27, wherein the film comprises the recycled post-consumer waste polyethylene material at a content of from 10 to 50% by weight based on the total weight of the film.

31. The multilayer stretch film according to claim 30, wherein the film comprises the recycled post-consumer waste polyethylene material at a content of from 15 to 35% by total weight of the film.

32. The multilayer stretch film according to claim 27, wherein the thickness of the film is in the range of from 5 to 20 μm.

33. The multilayer stretch film according to claim 32, wherein the thickness of the film is in the range of from 7 to 17 μm.

34. The multilayer stretch film according to claim 27, wherein the thickness of the film is in the range of from 10 to 40 μm.

35. The multilayer stretch film according to claim 34, wherein the thickness of the film is in the range of from 15 to 25 μm.

36. The multilayer stretch film according to claim 27, wherein said recycled post-consumer waste polyethylene material is comprised in the at least one core layer.

37. The multilayer stretch film according to claim 27, wherein the film comprises virgin linear low density polyethylene (LLDPE) at a content of from 30 to 80% by weight based on the total weight of the film.

38. The multilayer stretch film according to claim 37, wherein the film comprises virgin linear low density polyethylene (LLDPE) at a content of from 35 to 55% by weight based on the total weight of the film.

39. The multilayer stretch film according to claim 27, wherein the film comprises virgin low density polyethylene (LDPE) at a content of from 1 to 20% by weight of the total weight of the film.

40. The multilayer stretch film according to claim 27, wherein the film has a machine direction elongation at break of at least 200% as determined according to ASTM D882.

41. The multilayer stretch film according to claim 27, wherein the stress required in order to stretch the film by 70% in the longitudinal direction is less than 17 MPa as determined according to ASTM D882.

42. The multilayer stretch film according to claim 30, wherein the multilayer film comprises the recycled post-consumer waste polyethylene material at a content of from 10 to 50% by weight based on the total weight of the film, and a virgin polyethylene material at a content of 50 to 90% by weight based on the total weight of the film.

43. A method of producing a multilayer stretch film, the method comprising the steps of: a) providing at least one first extrudible composition comprising at least one polymer; b) providing at least one additional extrudible composition comprising at least one polymer; c) extruding the at least one first extrudible composition obtained in step a) to form the least one core layer of the multilayer stretch film; d) extruding the at least one additional extrudible composition to form two exterior layers on opposing sides of the at least one core layer, wherein at least one of the extrudible compositions comprises recycled post-consumer waste polyethylene material, wherein said recycled post-consumer waste polyethylene material is present at a content of from 10 to 90% by weight based on the total weight of the extrudible compositions, and wherein the thickness of the multilayer stretch film is in the range of 5-40 μm.

44. The method according to claim 43, comprising a step of: a0) providing gathered recycled post-consumer waste polyethylene material, and wherein the at least one polymer of at least one of steps a) and b) is said gathered recycled post-consumer waste polyethylene material provided in step a0).

45. The method according to claim 43, wherein the method further comprises the step of: e) stretching the multilayer stretch film so that the film length increases by 50-400%.

46. A method according to claim 45, wherein in step (e), the multilayer stretch film is stretched so that the film length increases by 100-300 percent.

47. The method according to claim 45, further comprising a step: f) relaxing the film to obtain a manufactured, prestretched film.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0117] FIGS. 1a and 1b are schematic illustrations of the process and equipment for producing multilayer stretch films according to embodiments of the present disclosure.

[0118] FIGS. 2a and 2b are schematic illustrations of the different layers in multilayer stretch films according to embodiments of the present disclosure.

[0119] FIG. 3 is a perspective view of a round bale illustrating the shape and features referred to in the description of the present invention

DETAILED DESCRIPTION

[0120] FIG. 1a illustrates an exemplary method of producing the multilayer stretch film according to the invention, in which the film is not pre-stretched in-line during manufacture.

[0121] A film composition comprising at least 10% by weight of recycled post-consumer waste polyethylene material (PCR) is extruded from a blow extruder 1 to form a blown film bubble that is advanced through primary nip rollers 1a. The nip roller nips together the blown film and the tubular film is passed to a dividing station 6 where the edges of the film 2 may be cut to provide two individual sheets of film. Next, the film 2 is passed to the secondary nip rollers 7 where the individual sheets of film 8 may be separated. Each film sheet 8 may optionally pass through a second dividing station (not shown) where the sheet may be divided longitudinally into two or more parallel sections. Finally, the film sheets, or film sheet sections, are wound onto the winders 9. In embodiments of the invention where the edges of the tubular film are not cut in the dividing station 6, the tubular film is typically wound onto one of the winders 9.

[0122] FIG. 1a illustrates an exemplary method of producing the multilayer stretch film according to the invention, in which the film is pre-stretched in-line during manufacture.

[0123] A film composition comprising at least 10% by weight of recycled post-consumer waste polyethylene material (PCR) is extruded from a blow extruder 1 to form a blown film bubble that is advanced through primary nip rollers 1a. The nip roller nips together the blown film.

[0124] Optionally, for producing a prestretched film, the tubular film 2 is passed from the primary nip rollers via guide rollers to the stretch unit 3, where stretching is performed between two rollers, first draw roller 4 and second draw roller 5, having different speeds. After being stretched in the stretch unit 3, the tubular film is passed to a dividing station 6 where the edges of the film 2 may be cut to provide two individual sheets of film. Next, the film 2 is passed to the secondary nip rollers 7 where the individual sheets of film 8 may be separated. Each film sheet 8 may optionally pass through a second dividing station (not shown) where the sheet may be divided longitudinally into two or more parallel sections. Finally, the film sheets, or film sheet sections, are wound onto the winders 9. In embodiments of the invention where the edges of the tubular film are not cut in the dividing station 6, the tubular film is typically wound onto one of the winders 9.

[0125] In order to achieve a desired prestretching, the film may be stretched in the stretch unit 3 and subsequently relaxed. For example, the precursor film may be stretched by more than the desired final degree of prestretching and partially relaxed. For instance, the film may be stretched in the stretch unit by 180% and then relaxed to provide a prestretched film having a prestretching degree of 150%. Hence, as used herein, the expression “degree of prestretching” refers to the degree of prestretching of the manufactured film, which is optionally relaxed, and not necessarily to the maximum degree of stretching experienced by the film during the manufacturing process. The stretching is typically conducted at a temperature in the range of 20° C. to 70° C.

[0126] FIG. 2a shows an illustrative example of a multilayer stretch film 100 of the present disclosure suitable for use as a pallet wrapping film.

[0127] The film 100 comprises at least one core layer 101 arranged between two exterior layers 102a, 102b. The film 100 comprises a recycled post-consumer waste polyethylene material at a content of from 10 to 50% by weight based on the total weight of the film 100.

[0128] In this illustrative example, the core layer 101 comprises three individual core layers 101a, 101b and 101c.

[0129] The core layers 101a, 101b and 101c have together about 80% of the weight content of the film 100, whereas the exterior layers 102a, 102b have about 10% of the weight content each. As an example, the middle core layer may have about 40% of the total weight content of the film 100, whereas the upper 101a and lower 101b core layer have about 20% of the total weight content of the film 100.

[0130] In this example, all of the recycled post-consumer waste polyethylene material is within the core layers. All of the individual core layers may have the same weight percentage of the post-consumer waste polyethylene material.

[0131] The total thickness of the film 100 illustrated in FIG. 2a, i.e. the thickness of the core layer 101 and the two exterior layers 102a, 102b, is in the range of 5-30 μm, such as between 10-25 μm.

[0132] FIG. 2b shows an illustrative example of a multilayer stretch film 100 of the present disclosure suitable for use as a bale wrap film.

[0133] The film 100 comprises a single core layer 101 arranged between two exterior layers 102a, 102b. The film 100 comprises a recycled post-consumer waste polyethylene material at a content of from 10 to 50% by weight based on the total weight of the film 100.

[0134] The core layer 101 comprises between 70-80% of the total weight content of the film 100, whereas the exterior layers 102a, 102b have about 10-15% each of the total weight content.

[0135] In this example, all of the recycled post-consumer waste polyethylene material is within the single core layer 101.

[0136] The total thickness of the film 100 illustrated in FIG. 2b, i.e. the thickness of the core layer 101 and the two exterior layers 102a, 102b is in the range of 20-30 μm, such as about 25 μm.

[0137] FIG. 3 illustrates a typical agricultural round bale, e.g. for silage production. The bale 200, having been compressed in the baling chamber of the baler (not shown), has a generally cylindrical shape comprising an envelope surface 201 and two side surfaces 202.

[0138] Conventional baling of agricultural bulk products, such as grass, hay, silage or straw comprises compressing the product in the baling chamber of a baling apparatus to form a round bale and subsequently wrapping a net around the bale in order to retain the compressed shape, or at least to allow only little expansion, when the bale leaves the baling chamber. The film of the present invention may be used to replace said net, hence the term “net replacement film”,

[0139] When used in a baling process, the prestretched film according to the invention is typically provided in the form of a film roll mounted in the baler used for the baling, and is dispensed from the roll via film dispensing means to a second stretch unit also provided in the baler. In the second stretch unit the film is subjected to a second stretching, effected in one or more stretching steps. In the second stretch unit the prestretched film may be stretched longitudinally by 2-150% relative to its prestretched length, corresponding to a stretch ratio of from 1:1.02 to 1:2.5, such as of from 1:1.10 to 1:1.35, such as of from 1:1.10 to 1:1.30, such as of from 1:1.20 to 1:1.30, such as of from 1:1.10 to 1:25, such as of from 1:1.13 to 1:1.23. After the second stretching, the film is applied under tension on the bale, still within the baling chamber. Balers provided with means for holding a film roll, film dispensing means and a stretch unit are known in the art and may be employed in a method according to the present invention.

[0140] The baling method described herein may reduce the volume of the bale of compressed material by up to 17% compared to the volume of a bale wrapped with conventional net. It is even possible that the net replacement film may achieve a further compression of the bale compared to its dimensions before wrapping; however, such a compression is difficult to determine since the exact actual dimensions of the compressed bale in the baling chamber are unknown and hence the inner dimensions of the chamber are used for calculating a theoretical bale volume.

[0141] The film may be applied at least about 1.5 turns around the bale, i.e. such that at least about half of the envelope surface of the bale is covered by two layers of the film and the remaining part of the envelope surface of the bale is covered by a single layer of the film. By applying the film with at least half a turn of overlap between film layers, a film comprising a tackifying agent as described above adheres sufficiently firmly to itself in order to exert the force(s) necessary on the bale. The present film may also be applied more than 1.5 turns around the bale, for example, the film may be applied to provide from 2 to 10 layers of film as measured centrally on the envelope surface of the bale. Typically, from 3 to 5 layers of film are applied around the bale.

[0142] If the film does not contain a tackifying agent, the film must be attached by other means when applied on the bale. Examples of such means include tape strips and adhesive, which can be applied on the film, e.g. in the area of overlapping layers, in order for the subsequent film layer to adhere to the preceding film layer

[0143] The present film is typically applied on the bale as a first contact layer, that is, the first layer of film is applied directly onto the bulk material. Typically, no netting is applied around the bale before applying the present film. Hence, the present film can be used for replacing the net, thus avoiding many drawbacks of conventional baling methods, while also offering the new advantage of reducing the volume of the bale.

[0144] When the desired number of layers of film have been applied, the film is cut and, if necessary, attached to the subsequent layer and then the wrapped bale is ejected from the baling chamber.

EXPERIMENTAL EXAMPLES

Example 1: Manufacture of a Blown Pallet Stretch Film of Different Thickness

Materials and Methods

[0145] Multilayer stretch films were produced having a PCR content of about 25% by weight. The multilayer films were produced without any pre-stretching during manufacture. The films were five-layer films consisting of two extruded outer layers (skin layers) A and E and three extruded core layers B-D, which were blown to different thicknesses. The compositions of the different layers of the multifilm are listed in Table 1 below.

TABLE-US-00001 TABLE 1 Weight Layer (% of whole Layer type multilayer film) Composition A skin 10 Plastomer.sup.1 98%, AO.sup.2 2%. B core 20 LLDPE.sup.3 58%, PCR.sup.4 32%, Edge portions.sup.5 10% C core 40 LLDPE 50%, PCR 32%, Edge portions 18% D core 20 LLDPE 58%, PCR 32%, Edge portions 10% E skin 10 LDPE.sup.6 100% .sup.1= MFI 3 g/10 min (2.16 kg, 190° C.), density 0.880 g/cm.sup.3 .sup.2= Antioxidant .sup.3= MFI 1.0 g/10 min (2.16 kg, 190° C.), density 0.920 g/cm.sup.3 .sup.4= PCR (LLDPE content 35-100%, LDPE content 0-65%) .sup.5= Recycled edge trims of the same produced film .sup.6= MFI 0.75 g/10 min (2.16 kg, 190° C.), density 0.923 g/cm.sup.3

[0146] The multi-layered film was produced in three different target thicknesses: 12 μm, 17 μm and 23 μm. Physical parameters of the produced films were measured using standard methods as known in the art.

Results

[0147] The measured physical properties of the produced films (films 1-3) are listed in Table 2 below.

TABLE-US-00002 TABLE 2 Property Method Film 1 Film 2 Film 3 Film thickness (μm) SS241013B 13.3 18.5 26.6 Dartdrop (g) ASTMD1709 65 90 130 Elmendorf MD (mN) ASTMD1922 (ISO 6383) 291 660 1196 Elmendorf TD (mN) ASTMD1922 (ISO 6383) 4161 5567 8138 Tear strength MD (MPa) ASTM 882D (ISO 527-3) 34.3 28.8 23.4 Tear strength TD (MPa) ASTM 882D (ISO 527-3) 18.6 19.5 18.1 Yield point (MPa) ASTM 882D (ISO 527-3) 13.0 10.4 8.8 Yield point (MPa) ASTM 882D (ISO 527-3) 10.0 10.3 10.2 Elongation MD (%) ASTM 882D (ISO 527-3) 270 351 414 Elongation TD (%) ASTM 882D (ISO 527-3) 593 588 589

[0148] As seen in Table 2, all films had good tensile strength properties. In addition, the stretching properties were tested in a wrapping machine (Cyklop GL300), in which it was concluded that film 1 could be stretched about 160% and film 3 could be stretched about 350%.

Example 2: Manufacture of a Bale Wrap Film (Silage Film)

Materials and Methods

[0149] A wrap film produced having a PCR content of about 25% by weight. The wrap film was a three-layer film consisting of two extruded outer layers (skin layers) A and C and an extruded core layer B. Two different films were produced; one with a PCR weight content of about 25% PCR and one with a PCR weight content of about 35%.

[0150] The composition of the different layers of the wrap film are listed in Tables 3 and 4 below

TABLE-US-00003 TABLE 3 Weight (% of whole Layer multilayer Layer type film) Composition of film 5 A skin 10 EVA.sup.1 94%, UV Stabilizers and tackifier 6% B core 77 LLDPE.sup.2 43.8%, PCR.sup.3 32%, PIR.sup.4 10%, Color masterbatch, UV stabilizers and tackifier 14.2% C skin 13 LLDPE.sup.5 83.2%, LDPE.sup.6 and UV stabilizer 16.8% .sup.1= Vinyl acetate content: 18% by weight, MFI 1.7 g/10 min (2.16 kg, 190° C.), density 0.941 g/cm.sup.3 .sup.2= MFI 0.85 g/10 min (2.16 kg at 190° C.), density 0.918 g/cm.sup.3 .sup.3= PCR (LLDPE content 35-100%, LDPE content 0-65%) .sup.4= PIR (Post industrial recycled polymeric material), such as recycled edge trims of the same produced film or similar films .sup.5= MFI 1.0 g/10 min (2.16 kg at 190° C.), Density 0.920 g/cm.sup.3 .sup.6= MFI 0.25 g/10 min (2.16 kg at 190° C.), Density 0.921 g/cm.sup.3

TABLE-US-00004 TABLE 4 Weight (% of whole Layer multilayer Layer type film) Composition of film 4 A skin 10 EVA.sup.1 94%, UV Stabilizers and tackifier 6% B core 77 LLDPE.sup.2 30.8%, PCR.sup.3 45%, PIR.sup.4 10%, Color masterbatch, UV stabilizers and tackifier 14.2% C skin 13 LLDPE.sup.5 83.2%, LDPE.sup.6 and UV stabilizer 16.8% .sup.1= Vinyl acetate content: 18% by weight, MFI 1.7 g/10 min (2.16 kg, 190° C.), density 0.941 g/cm.sup.3 .sup.2= MFI 0.85 g/10 min (2.16 kg at 190° C.), density 0.918 g/cm.sup.3 .sup.3= PCR (LLDPE content 35-100%, LDPE content 0-65%) .sup.4= PIR (Post industrial recycled polymeric material), such as recycled edge trims of the same produced film or similar films .sup.5= MFI 1.0 g/10 min (2.16 kg at 190° C.), Density 0.920 g/cm.sup.3 .sup.6= MFI 0.25 g/10 min (2.16 kg at 190° C.), Density 0.921 g/cm.sup.3

[0151] Physical parameters of the produced films were measured using standard methods as known in the art.

Results

[0152] The measured physical properties of the produced films (films 4 and 5) are listed in Table 5:

TABLE-US-00005 TABLE 5 Property Method Film 4 Film 5 Film thickness (μm) SS241013B 24.2 24.3 Dartdrop (g) ASTMD1709 160 190 Elmendorf MD (mN) ASTMD1922 (ISO 6383) 1004 1170 Elmendorf TD (mN) ASTMD1922 (ISO 6383) 6389 7312 Tear strength MD (MPa) ASTM 882D (ISO 527-3) 23.7 25.8 Tear strength TD (MPa) ASTM 882D (ISO 527-3) 18.7 18.5 Yield point (MPa) ASTM 882D (ISO 527-3) 8.1 8.4 Yield point (MPa) ASTM 882D (ISO 527-3) 8.8 8.5 Elongation MD (%) ASTM 882D (ISO 527-3) 426 444 Elongation TD (%) ASTM 882D (ISO 527-3) 618 614

[0153] As seen in Table 5, both films had good tensile strength properties. In addition, the wrap films were tested in a baling machine to confirm that the films had sufficiently good wrapping properties.

Example 3. Manufacture of a Net Replacement Film

Materials and Methods

[0154] Net replacement film having PCR content of 25% was produced. The net replacement films were three-layer films each consisting of two extruded outer layers (skin layers) A and C and an extruded core layer B. Two different films (NRF A and NRF B) were produced; with a PCR weight content of about 25% PCR. The films were pre-stretched to a degree of 175% (NRF A) and 220% (NRF B).

[0155] The composition of the different layers of the net replacement film are listed in Tables 6 and 7 below

TABLE-US-00006 TABLE 6 NRF A Weight Layer (% of whole Layer type multilayer film) Composition of film 5 A skin 10 EVA.sup.1 96%, UV Stabilizers and tackifier 4% B core 77 LLDPE.sup.2 57%, PCR.sup.3 32%, PIR.sup.4 6.5%, Color masterbatch, UV stabilizers and tackifier 4.5% C skin 13 LLDPE.sup.5 87%, LDPE.sup.6 and UV stabilizer 13% .sup.1= Vinyl acetate content: 18% by weight, MFI 1.7 g/10 min (2.16 kg, 190° C.), density 0.941 g/cm.sup.3 .sup.2= MFI 0.85 g/10 min (2.16 kg at 190° C.), density 0.918 g/cm.sup.3 .sup.3= PCR (LLDPE content 35-100%, LDPE content 0-65%) .sup.4= PIR (Post industrial recycled polymeric material), such as recycled edge trims of the same produced film or similar films .sup.5= MFI 1.0 g/10 min (2.16 kg at 190° C.), Density 0.920 g/cm.sup.3 .sup.6= MFI 0.25 g/10 min (2.16 kg at 190° C.), Density 0.921 g/cm.sup.3

TABLE-US-00007 TABLE 7 NRF B Weight Layer (% of whole Layer type multilayer film) Composition of film 4 A skin 10 EVA.sup.1 96%, UV Stabilizers and tackifier 4% B core 77 LLDPE.sup.2 57%, PCR.sup.3 32%, PIR.sup.4 6.5%, Color masterbatch, UV stabilizers and tackifier 4.5% C skin 13 LLDPE.sup.5 87%, LDPE.sup.6 and UV stabilizer 13% .sup.1= Vinyl acetate content: 18% by weight, MFI 1.7 g/10 min (2.16 kg, 190° C.), density 0.941 g/cm.sup.3 .sup.2= MFI 0.85 g/10 min (2.16 kg at 190° C.), density 0.918 g/cm.sup.3 .sup.3= PCR (LLDPE content 35-100%, LDPE content 0-65%) .sup.4= PIR (Post industrial recycled polymeric material), such as recycled edge trims of the same produced film or similar films .sup.5= MFI 1.0 g/10 min (2.16 kg at 190° C.), Density 0.920 g/cm.sup.3 .sup.6= MFI 0.25 g/10 min (2.16 kg at 190° C.), Density 0.921 g/cm.sup.3

[0156] Physical parameters of the produced films were measured using standard methods as known in the art, and compared to a reference film made from virgin material.

[0157] The produced films were also tested as net replacement for wrapping the envelope surface of a silage bale.

Results

[0158] The produced film NRF A could satisfactorily be used to wrap the envelope surface of approximately 1100 silage bales in a McHale Fusion 3 Plus integrated baler wrapper, with a stretching before wrapping in the range of 18-27%, under a temperature of up to 26° C. When wrapped on a silage bale, no differences could be observed between the NRF A film and a reference film made from virgin material. The test was performed during June and September

[0159] The produced film NRF B could satisfactorily be used to wrap the envelope surface of approximately 1000 silage bales in a McHale Fusion 3 Plus integrated baler wrapper, with a stretching before wrapping in the range of 15-20%, under a temperature of up to 28° C. When wrapped on a silage bale, no differences with regard to the mechanical properties could be observed between the NRF B film and a reference film made from virgin material. The test was performed during June and September

[0160] The measured physical properties of the produced films (NRF A and NRF B) and a reference film (Ref) made of virgin material are listed in Table 8:

TABLE-US-00008 TABLE 8 Property Method NRF A NRF B Ref Film thickness (μm) SS241013B 16.2 15.3 15.8 Dartdrop (g) ASTMD1709 125 120 120 Elmendorf MD (mN) ASTMD1922 (ISO 6383) 1066 1002 1113 Elmendorf TD (mN) ASTMD1922 (ISO 6383) 5260 5288 5093 Tear strength MD (MPa) ASTM 882D (ISO 527-3) 77.1 102.0 76.2 Tear strength TD (MPa) ASTM 882D (ISO 527-3) 16.1 15.5 23.2 Yield point MD (MPa) ASTM 882D (ISO 527-3) 36 48.5 37.0 Yield point TD (MPa) ASTM 882D (ISO 527-3) 10.9 11.7 11.6 Elongation MD (%) ASTM 882D (ISO 527-3) 169 140 169 Elongation TD (%) ASTM 882D (ISO 527-3) 582 581 689

[0161] The person skilled in the art realizes that the present invention by no means is limited to the preferred embodiments described above. On the contrary, many modifications and variations are possible within the scope of the appended claims. Additionally, variations to the disclosed embodiments can be understood and effected by the skilled person in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word “comprising” does not exclude other elements or steps, and the indefinite article “a” or “an” does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measured cannot be used to advantage.

Itemized List of Embodiments

[0162] 1. A multilayer stretch film comprising at least one core layer arranged between two exterior layers, wherein the thickness of the film is in the range of 5-40 μm, and wherein the film comprises a recycled post-consumer waste polyethylene material at a content of from 10 to 90% by weight based on the total weight of the film.

[0163] 2. The film according to item 1, wherein at least one of the exterior layers is free of recycled post-consumer waste polyethylene material.

[0164] 3. The film according to item 2, wherein both exterior layers are free of recycled post-consumer waste polyethylene material.

[0165] 4. The film according to any previous item, wherein the film comprises a recycled post-consumer waste polyethylene material at a content of from 10 to 50% by weight based on the total weight of the film.

[0166] 5. The film according to item any previous item, wherein the thickness of the film is in the range of 5-20 μm, such as from 5 to 25 μm, such as from 7 to 17 μm.

[0167] 6. The film according to any one of items 1-4, wherein the thickness of the film is in the range of 10-40 μm, preferably from 15 to 40 μm, such as from 15 to 25 μm.

[0168] 7. The multilayer film according to any one of the preceding items, wherein the film comprises from 15 to 35% by weight of the recycled post-consumer waste polyethylene material.

[0169] 8. The multilayer film according to any one of the preceding items, wherein said recycled post-consumer waste polyethylene material is comprised in the at least one core layer.

[0170] 9. The multilayer film according to any one of the preceding items, wherein the film comprises virgin linear low density polyethylene (LLDPE) at a content of from 30 to 80%, such as from 35 to 55%, such as from 40 to 45%, by weight based on the total weight of the film.

[0171] 10. The multilayer film according to any one of the preceding items, wherein the film comprises virgin low density polyethylene (LDPE) at a content of from 1 to 20%, such as from 2 to 15%, by weight of the total weight of the film.

[0172] 11. The multilayer film according to any one of the preceding items, wherein the film has a machine direction elongation at break of at least 200%, such as at least 250%, such as at least 270%, such as at least 300%, as determined according to ASTM D882.

[0173] 12. The multilayer film according to any one of the preceding items, wherein the stress required in order to stretch the film by 70% in the longitudinal direction is less than 17 MPa, preferably less than 14 MPa, as determined according to ASTM D882.

[0174] 13. Use of a multilayer stretch film according to any one of items 1 to 12 as an agricultural bale wrap film.

[0175] 14. Use of a multilayer stretch film according to any one of items 1 to 12 as a waste wrap film.

[0176] 15. Use of a multilayer stretch film according to any one of the items 1 to 12 as pallet stretch wrap film.