SE526512C2 - Transparent plastic laminated packaging laminate with gas barrier - Google Patents

Abstract

The invention relates to a transparent gas barrier packaging laminate (10) having a required bending stiffness, comprising outer layers of heat-sealable polyolefin (16, 17), two polymer carrier layers (11, 12) each being coated with a SiOx gas barrier layer (13, 14), wherein the two polymer carrier layers with SiOx layers are laminated to each other by means of an intermediate polymer layer (15), which in comparison to the other surrounding layers is relatively stiff and thicker. The required stiffness of the packaging laminate is obtained by the I-beam interaction between the two carrier layers and the intermediate distancing polymer layer. Preferably, the thickness of the intermediate polymer layer (15) constitutes from about 30 to about 55 % of the total thickness of the packaging laminate (10). The invention also relates to a packaging container such as a pouch or similar manufactured from the packaging laminate and to a method of manufacturing of the packaging laminate.

Description

20 25 30 526 512 2 the packaging container to a parallelepipedic packaging container. The main advantage of this process concept with continuous forming of a tube, filling and sealing, is that the web can be sterilized continuously, just before the forming of the tube, which allows for an aseptic packaging process, ie. a process in which the liquid content to be filled, as well as the material itself, is depleted of bacteria and the filled packaging container is prepared under clean conditions, so that the filled packaging can be stored for a long time, even at room temperature, without the growth of microorganisms risk in the filled product. An important factor for long-term storage is of course also the gas barrier properties of the filled and sealed packaging container, which in turn is strongly dependent on the gas barrier properties of the packaging laminate itself, but also on the quality of seals and opening device of the finished package. Another important advantage of the packaging process of the Tetra Brik® type is, as stated above, the possibility of continuous packaging at high speed, which has a significant impact on cost efficiency. The bag-type beverage packages available on the market today, however, are typically manufactured by other, non-aseptic, more complex and expensive processes of a less continuous nature. It is also known in the prior art to apply gas barrier coatings of SiOx to a substrate, by means of plasma enhanced chemical vapor deposition (PECVD). The advantages of a gas barrier layer of SiOx compared to other gas barrier materials, is firstly that it has a positive environmental profile and secondly that it is not affected when it comes in contact with ambient moisture or liquid, it is transparent and because it is applied in very thin layer, it is also flexible and resistant to cracks when it is bent or folded.

It is known from EP-A-385054 to laminate together two gas barrier layers of a silicon compound, such as silicon dioxide, facing each other, by means of an intermediate bonding layer. However, this document does not say anything about the rigidity properties of the laminate and does not describe a thicker or stiffer intermediate layer.

Furthermore, the layers of silica (SiO2) described are substantially different from the PECVD coated layers of SiOx contemplated by the present invention. 10 15 20 25 30 526 512 33 :; __ 3 There is thus a need for a thin, transparent and gas-tight packaging laminate without metal foil, which has suitable properties for an aseptic, continuous, high-speed packaging process similar to the packaging process for Tetra Brik® Aseptic. An important factor in such a process is the rigidity and stability of the packaging laminate. If the laminate web is too flexible and easy to displace the high speed tube forming process, the process will not be able to run safely and continuously. On the other hand, if the packaging laminate, in order to obtain the required rigidity, is too thick, it can be difficult to carry out the tube forming process. Furthermore, it is of course the case that the cost-effectiveness of the material itself will be reduced with increasing thickness.

The bag-type beverage packages currently available on the market often have a laminated construction including a single gas barrier layer of e.g. an ethylene vinyl alcohol polymer (EVOH) and does not have the rigidity requirements of the present invention.

It is therefore an object of the present invention to provide a packaging laminate which alleviates the above-discussed disadvantages and problems.

It is an object of the present invention to provide a transparent packaging laminate with gas barrier properties suitable for aseptic packaging and long term storage, as well as with sufficient flexural stiffness to be suitable for continuous high speed packaging of liquid foods by a continuous tube forming process.

It is a further object of the invention to provide a packaging laminate which has the required rigidity with which is thin enough to fold the package at at least one end thereof.

The invention is also directed to a packaging container filled with beverage or liquid food, which is produced from the packaging laminate according to the invention according to the invention, as well as to a method for manufacturing the laminated packaging material according to the invention.

BRIEF DESCRIPTION OF THE INVENTION The above objects are achieved by the characterizing features of claim 1. Preferred embodiments of the packaging laminate of the invention are specified in the dependent claims 2-18. The solution to the above-mentioned problems and needs is thus to offer a thin, transparent packaging laminate with good gas barrier properties by laminating the two polymeric carrier layer films, which are coated with the gas barrier layers of SiOx, to together with an intermediate layer forming an I-beam arrangement, the intermediate layer in comparison with the other surrounding laminate layers being a relatively thick spacer layer of a high stiffness polyolefin and wherein the laminate also has outer, heat-sealable layers of thermoplastic polymer.

The polymeric carrier layers preferably comprise polyester or polyamide materials and therefore have a certain degree of inherent rigidity, although other relatively rigid polymers can also be used for the carrier layers according to the invention. More preferred are the oriented films and thus have a higher degree of crystallinity than non-oriented polymeric films. The olefin polymer in the intermediate layer also in itself contributes a certain degree of rigidity to the packaging laminate as a whole. The so-called 1-beam arrangement of two relatively rigid carrier layers, which are laminated on each side of a thicker and relatively rigid, intermediate polymer layer, provides a laminate which has surprisingly good flexural stiffness in relation to its thickness. In addition, the arrangement of the two PECVD-deposited SiOx layers has been found to result in a much more than doubled gas barrier compared to a laminate or a film containing only one SiOx layer. The arrangement of a thicker, intermediate layer which also acts as a "buffer" for the permeation of gas, in particular oxygen, thus gives a surprising improvement in gas barrier properties, which shows that a synergy effect arises in this particular arrangement. The laminate thus has excellent gas barrier properties and is both economical and easy to handle in continuous high speed packaging processes.

Preferably, the thickness of the intermediate layer does not constitute more than from about 30% to about 55% of the total thickness of the packaging laminate, more preferably from about 35% to about 50%. It is thus clear that the required bending stiffness of the resulting packaging laminate is not only a result of the thickness of the intermediate layer, but that some kind of interaction occurs between the layers in the laminate, which we know as the so-called 1-beam effect. Preferably, the thickness of the carrier layers constitutes from about 5 to about 20, more preferably from about 5 to about 15% of the total packaging laminate, which shows that also the carrier layers not only by their thickness contribute to the total the flexural stiffness of the packaging laminate, but instead need to contribute through their inherent rigidity properties and their interaction with the thicker intermediate layer.

The oriented polymer carrier film is preferably a prefabricated film of polyester or polyamide, such as a cast film or preferably a mono- or biaxially oriented polyethylene terephthalate (PET), polyethylene naphthenate (PEN) or polyamide (PA). By using prefabricated, oriented films as carrier layers, it is ensured that they have the same inherent flexural stiffness relative to other layers in the laminate which are extrusion or co-extrusion laminated.

The polymer for the intermediate layer is also preferably a polyolefin with higher rigidity properties than e.g. low density polyethylene (LDPE), such as e.g. high density polyethylene (HDPE) or polypropylene (PP). By using a polyolefin which has relatively higher inherent flexural stiffness properties, in the intermediate layer, an extra contribution is obtained in addition to the I-beam effect, to the packaging laminate as a whole.

Thus, the polymer for the intermediate layer is preferably an olefin polymer having higher stiffness than LDPE and the polymer for the carrier layer is an oriented polyester or polyamide.

According to a most preferred embodiment of the invention, the gas barrier layers of SiOx are positioned in the laminate in such a way that they face each other, with the intermediate polymer layer between them. In this way, optimal gas barrier layers can be obtained and the layers of SiOx will be best protected.

However, embodiments are also conceivable in which one or both SiOx layers face outwards in the laminate structure.

The SiOx layer is preferably deposited by PECVD technique, where x = 1.7 - 2.0, with a thickness of from about 50 to about 500 Å, preferably from about 80 to about 300 Å. There are alternative methods of depositing inorganic layers. , such as SiOx, on polymer films, which, however, generally result in thicker and less flexible layers of SiOx. This in turn results, due to cracks in the SiOx layer, generally in lower quality laminates with respect to oxygen barrier properties. Thus, it is preferred according to the invention that the gas barrier layers of SiOx be applied by the continuous method of plasma enhanced chemical vapor deposition (PECVD) of SiOx from plasma of an organic cleavage compound such as hexadimethylsiloxane (HDMSO).

The thickness of the polymeric backing layer is preferably from about 7 to about 30 microns, more preferably from about 8 to about 20 microns, most preferably from about 8 to about 15 microns, and in a preferred embodiment, the two backing layers of polymer have about the same or exactly the same thickness. . It is known that the PECVD process works optimally at the above-mentioned thickness of the carrier layer, which is also preferred from an economic point of view. To ensure a symmetrical and reliable behavior of the filling and packaging process, it is best to use carrier layers, ie. the outer layers of the 1-beam arrangement, which have approximately the same or exactly the same thickness, although it may be possible for certain desired properties to use carrier layers of different thickness or flexural stiffness.

Preferably, the thickness of the intermediate layer is from about 40 to about 80 microns, more preferably from about 40 to about 60 microns, most preferably from about 40 to about 55 microns and this is preferably while the total thickness of the packaging laminate is from about 100 to about 150 microns. pm, most preferably from about 110 to about 130 pm.

For optimal 1-beam effect, the thickness of the intermediate layer should be from about 40 to about 60 μm, as the intermediate layer comprises a polymer such as e.g. HDPE or PP. For other alternative, interlayer polymers, it may be appropriate to use thicker intermediate layers, such as up to 80 microns, especially if the total thickness of the packaging laminate is desired to be from about more than 130 to about 150 microns.

The thickness of the intermediate layer (15) is from 40 to 60 μm, the thickness of the polymeric carrier layer (11, 12) is from 8 to 15 μm, the thickness of the outer layers of heat-sealable olefin polymer (16, 17) is from 10 to 15 μm and from 18 to 25 μm, respectively, and the total thickness of the packaging laminate is from 110-130 μm. 10 15 20 25 30 5 2 6 512: rf f. . More preferably, the thickness of the intermediate layer (15) is from 40 to 50 μm, the thickness of the polymeric carrier layer (11, 12) is from 12 to 15 μm, the thickness of the outer layers of heat-sealable olefin polymer (16, 17) is from 10 to 15 μm and from 18 to 25 μm, respectively, and the total thickness of the packaging laminate is from 10 to 10 130 μm.

Alternatively, the thickness of the intermediate layer (15) is 50 to 60 μm, the thickness of the polymeric carrier layer (11, 12) is from 8 to 12 μm, the thickness of the outer layers of heat-sealable olefin polymer (16, 17) is from 10 to 15 μm. pm and from 18-25 pm and the total thickness of the packaging laminate is from 110-130 pm.

In order to obtain an optimal bending stiffness from the 1-beam arrangement, the thickness ratio between the intermediate layer and the carrier layer is preferably from 4 to 7 and the ratio between the total thickness of the packaging laminate and the thickness of the intermediate layer is from 2 to 2.8, when the total thickness is from 110 to 130 μm, or the thickness ratio between the intermediate layer and the carrier layer is from 3 to 6 and the ratio between the total thickness of the packaging laminate and the thickness of the intermediate layer is from 1.8 to 2.3 when the total thickness is from 130 to 150 μm.

According to another aspect of the invention, there is provided a packaging container filled with beverage or liquid food, preferably an aseptic packaging container, made from the packaging laminate according to the invention.

This aspect is specified in claim 19.

The packaging container according to the invention is a bag or 'standing bag' or the like and is durable in handling and distribution and resistant to moisture and oxygen during long-term storage, due to the high-quality packaging laminate, which in turn also provides high quality seals and excellent gas barrier properties. Another important advantage of packaging containers made from the packaging laminate according to the invention is that they can withstand boiling or thawing by means of microwaves, as well as retorting.

According to another aspect of the invention, there is provided a method of making the laminated packaging material of the invention. This aspect is covered by the method defined in any one of claims 20-24. DETAILED DESCRIPTION OF THE INVENTION Further advantages and advantageous features of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying figures, in which: Fig. 1 'is a cross-sectional view of a device; preferred laminated packaging material according to the present invention, Fig. 2 shows a preferred example of a packaging container made from the packaging laminate according to the invention, and Figs. 3a, 3b and 3c show alternative, preferred embodiments of methods of manufacturing the packaging laminate.

Fig. 1 thus shows a transparent packaging laminate 10, comprising a first and a second carrier layer 11; 12 which are films of a preferably oriented polyester, such as e.g. polyethylene terephthalate (PET), or films of a preferably oriented polyamide (PA), on which coatings of a thin gas barrier layer of SiOx 13; 14 has been applied by plasma enhanced chemical vapor deposition (PECVD). The two SiOx layers are preferably facing the interior of the laminate and thus face each other. Between the two carrier layers which are coated with gas barrier layers, an intermediate layer 15 is laminated, which layer consists of a relatively rigid olefin polymer, such as e.g. high density polyethylene (HDPE) or polypropylene (PP). The intermediate layer is thicker than any of the surrounding layers in the packaging laminate, and thereby acts as a spacer element between the two carrier layer films of oriented polymer. When oriented, the preferred oriented polymeric films have a certain degree of inherent stiffness and may therefore have a relatively higher degree of crystallinity than non-oriented polymeric films. The olefin polymer in the intermediate layer also in itself contributes a certain degree of rigidity to the packaging laminate as a whole. The so-called 1-beam arrangement of two relatively rigid carrier layers laminated on each side of a thicker and relatively rigid, intermediate polymer layer provides a laminate which has surprisingly good flexural stiffness in relation to its thickness. In addition, the arrangement of the two PECVD-deposited SiOx layers has been found to result in a much more than doubled gas barrier compared to a laminate or a film containing only one SiOx layer. The arrangement of an intermediate layer which also 10 15 20 25 30 O oo! 9 acts as a "buffer" for the penetration of gas, in particular oxygen, thus giving a surprising improvement in gas barrier properties, which indicates that a synergy effect occurs in this particular arrangement.

On the outside of the paper or board layer 11, which will form the outside wall of a packaging container made from the packaging laminate, at least one layer 16 of a heat sealable olefin polymer is applied, preferably a low density polyethylene (LDPE) or a linear low density polyethylene layer. ), which also includes so-called metallocene-catalyzed LLDPE (m-LLDPE), ie. LLDPE polymers catalyzed by a single site catalyst. Other examples of alternative polymers for the outer layer of the packaging wall may be a medium density polyethylene (MDPE) or polypropylene (PP).

On the outside of the carrier layer 13, which will form the inside wall of a packaging container made from the packaging laminate, at least one layer 17 of a heat-sealable olefin polymer is applied, preferably a layer of LDPE or more preferably a layer of LLDPE and most preferably a first sublayer 17. of LDPE and a second, outer sublayer 17b of LLDPE.

The outer layers 16, 17 are each applied in an amount of from about 10 to about 25 microns, in order to obtain optimal heat-sealing properties in relation to cost-effectiveness.

For optimal adhesion between the various layers of the packaging laminate, adhesive layers of adhesive polymers, tie layers and primers, which are known in the art, are preferably used. Such bonding layers and primers are adapted to the specific choices of polymer in the different layers and can be selected from polyolefins and modified polyolefins, preferably polyethylene-based polymers, such as e.g. LDPE and modified LDPE. in the bonding layers 18, 19 between the layers of SiOx 13; 14 and the intermediate polyolefin layer 15, a polyethylene base polymer is preferably used which is graft modified by an unsaturated alkoxysilane compound, as described in U.S. Pat. 5,731,092 which is incorporated herein by reference. See especially column 1, row 39 to column 3, row 21 and Examples 1 and 2.

Other examples of bonding layers are homopolymers or copolymers of LDPE or grafted copolymers of polyethylene, grafted with monomers comprising carboxyl- or glycidyl-type functional groups, such as acrylic monomers or maleic anhydride monomers (MAH), e.g. ethylene (meth) acrylic acid copolymer (E (M) AA), ethylene-glycidyl (meth) acrylate copolymer (EG (M) A)) or MAH-grafted polyethylene (MAH-g-PE).

Any of the polymers discussed above can also be used in any bonding layers; 21 between the outer, heat-sealable polyolefin layers 16; 17 and the polymeric carrier layers 11; 12.

Fig. 2 shows a preferred example of a packaging container 20 made from the packaging laminate 10 according to the invention.

The packaging container is especially suitable for small beverage packages for direct use by means of a straw or the like. Such a package typically has a volume of about 330 ml or less, preferably from about 100 to about 250 ml, e.g. about 125 ml, 200 ml or about 250 ml. It can be a bag of any shape, but is preferably wedge-shaped 21, so that it is easy to handle and dimensionally stable when placed on a shelf in the food warehouse or on a table or the like. To provide such a "wedge shape", the bottom portion 22 of the package is formed so that the transverse heat seal 24 in the bottom is hidden under the triangular corner flaps 23, which are folded and sealed to the bottom of the package.

Fig. 3 shows a preferred embodiment 30a of a method of manufacturing the packaging laminate 10 according to the invention.

A first web 331 of a polymeric support layer 332 coated with a gas barrier layer 333 of SiOx and a second web 334 of a polymeric support layer 335 coated with a gas barrier layer 336 of SiOx are advanced toward an extrusion station 337, the two SiO the layers 333 and 336 preferably face each other, and are laminated to each other by extruding an intermediate polymer layer 338 between them and compressing the two webs 331, 334 and the intermediate layer 338 upon passage through a nip after the extrusion station 337. The intermediate polymer layer 338 may coextruded together with adjacent layers of binder polymer 339 for improved bonding to the SiOx layers on the two webs 331 and 334. The resulting laminated web 340 is advanced to an extrusion station 341, where an outer layer of a heat sealable polyolefin 342 is extruded on the outside. 526 512 11 of the polymeric carrier layer 335. The resulting web 343 is further advanced towards an extrusion station 344, where an outer layer of a heat-sealable polyolefin 345 is extruded on the outside of the polymeric carrier layer 332.

The resulting packaging laminate 346 will then be rolled up and stored on a reel, not shown.

Fig. 3 shows another preferred embodiment 30b of a method of manufacturing the packaging laminate 10 according to the invention.

A first web 331 of a polymeric carrier layer 332 coated with a gas barrier layer 333 of SiOx and a second web 334 of a polymeric carrier layer 335 coated with a gas barrier layer 336 of SiOx are advanced toward an extrusion station 337, the two SiO The layers 333 and 336 preferably face each other, and are laminated to each other by extruding an intermediate polymer layer 338 between them and compressing the two webs 331, 334 and the intermediate layer 338 as they pass through a nip after the extrusion station 337. The intermediate polymer layer 338 may coextruded together with adjacent layers of binder polymer 339 for improved bonding to the SiOx layers on the two webs 331 and 334. The resulting laminated web 340 is passed to a hot roll nip 341 ', where an outer layer of a prefabricated film comprising at least one layer of a heat sealable polyolefin 342 ', is laminated to the outside of the polymeric support sheet by applying heat and pressure to the hot nip 341 '. The resulting web 343 'is further advanced to a hot roll nip 344', where an outer layer of a prefabricated film comprising at least one layer of a heat sealable polyolefin 345 'is laminated to the outside of the polymeric backing layer 332, by applying heat and pressure to the hot roller nip 344 '.

The resulting packaging laminate 346 'will then be rolled up and stored on a reel, not shown.

Fig. 3c shows another preferred embodiment 30c of a method of making the packaging laminate 10 according to the invention.

A first web 331 of a polymeric carrier layer 332 coated with a gas barrier layer 333 of SiOx and a second web 334 of a polymeric carrier layer 335 coated with a gas barrier layer 336 of SiOx are advanced towards a hot 526 512 12 roll nips 337 ', the two SiOx layers 333 and 336 preferably facing each other, at the same time as a web of a prefabricated film of an intermediate polymer layer 338' is advanced between the two webs 331, 334 against the nip 337 ' . The three webs are laminated to each other by application of heat and pressure as they pass through the hot roller nip 337 '. The intermediate polymer layer 338 'may be a prefabricated film having outer layers of binder polymer 339' for improved bonding to the SiOx layers on the webs 331, 334.

The resulting laminated web 340 'is advanced to a hot roll nip 341', where an outer layer of a prefabricated film comprising at least one layer of a heat sealable polyolefin 342 'is laminated to the outside of the polymeric backing layer 335, by applying heat and pressure. in the hot roller nip 341 '. The resulting web 343 'is further advanced to a hot roll nip 344', where an outer layer of a prefabricated film comprising at least one layer of a heat sealable polyolefin 345 'is laminated to the outside of the polymeric backing layer 332, by applying heat and pressure to the hot roller nip 344 '.

The resulting packaging laminate 346 "will then be rolled up and stored on a reel, not shown. In the method 30a above, the extrusion stations 341 and 344 may be passed in reverse order according to an alternative, preferred embodiment.

In each of the above methods 30b and 30c, the lamination of the heat-sealable outer polyolefin films can be performed in reverse order, i.e. by first laminating the prefabricated film 345 'to the outside of the polymeric carrier layer 332, in the hot roll nip 344', resulting in a web 347. The web 347 is passed to a hot roll nip 341 ', in which the heat sealable, prefabricated outer film 342 'is then laminated to the outside of the polymeric carrier layer 335, resulting in the packaging laminate 346' or 346 ".

Other combinations of hot nip lamination and extrusion lamination are conceivable within the concept of the invention, as defined in the appended claims, although not shown in separate figures. For example, a method in which the intermediate polymer layer 338 'is a prefabricated film to be hot nip laminated as described in Fig. 3c can be combined with extrusion lamination of one or both of the outer, heat sealable layers 342. and 345, as described in connection with Fig. 3a.

According to other preferred embodiments of methods 30a, 30b and 30c, the surface of the gas barrier layer 333, 336 is treated by SiOx by a surface oxidizing treatment such as corona treatment, in order to provide improved adhesion to the intermediate polymer layer 338, 338 'or the bonding layers 339, 339'. .

According to an alternative embodiment of the method of manufacturing the packaging laminate according to the invention, the various prefabricated webs 331, 334, 338 ', 342' and 345 'are laminated to each other by means of solvent lamination.

The packaging laminate 10 may be provided with a printed decorative layer, to make the packaging container more attractive and informative to consumers and to protect its contents from light, which printed decoration may be applied to the SiOx layer 333 or 336 directed towards the outside of a packaging layer. packaging designed from the packaging laminate. Alternatively, it may be applied to the other side of the carrier layer 332 or to the outer layer of heat sealable polyolefin 342, 345, 342 ', 345'. In the latter case, the printed outside should preferably be covered by a thin, transparent, protective polymer layer.

In conclusion, it should be noted that the present invention, which has been described above with specific reference to the accompanying figures, is not limited to those embodiments which have been described and shown by way of example only, and that modifications and changes obvious to one skilled in the art are possible. without departing from the inventive concept set forth in the appended claims.

Claims (24)

1. 0 15 20 25 30 526 512 fL / Patentkrav A packaging laminate (10) having a gas barrier and required flexural stiffness, comprising outer layers of heat sealable olefin polymer (16, 17), a first gas barrier layer of SiOx (13), coated on a first polymeric carrier layer (11) and a second gas barrier layer of SiOx (14), coated on a second polymeric support layer (12), an intermediate polymer layer (15) of higher thickness relative to each of the surrounding layers being laminated between the two gas barrier coated support layers, so that the inherent rigidity of each one of the carrier layers (11, 12) by so-called 1-beam effect interacts with the inherent stiffness as well as the higher thickness of the intermediate polymer layer (15), to give the required flexural stiffness and thus make the packaging laminate suitable for packaging liquid foods and beverages in a continuous high-speed process, characterized in that said packaging laminate is a transparent packaging laminate, in which said adjacent polymer layers (15) have a thickness of from 40 to 80 μm and consist of an unexpanded polyolefin which has higher rigidity properties than low density polyethylene. . A transparent gas laminate packaging laminate according to claim 1, characterized in that the thickness of the intermediate layer (15) is from 30 to 55, preferably from 35 to 50,% of the total thickness of the packaging laminate (10). . A transparent packaging laminate with gas barrier according to any one of claims 1 or 2, characterized in that the thickness of a carrier layer (11, 12) is from 5 to 20, preferably from 5 to 15,% of the total thickness of the packaging laminate (10). . A transparent gas laminate packaging laminate according to any one of the preceding claims, characterized in that the polymeric carrier layer (1 1, 12) is a film of oriented polyester or polyamide. A transparent gas laminate packaging laminate according to any one of the preceding claims, characterized in that the carrier layer (1 1, 12) of oriented polymer is a film of a polymer selected from mono- or biaxially oriented polyethylene terephthalate (PET), mono- or biaxially oriented polyethylene naphthenate (PEN), mono- or biaxially oriented polyamide (PA). A transparent gas laminate packaging laminate according to any one of the preceding claims, characterized in that the polymer for the intermediate layer (15) is selected from high density polyethylene (HDPE) or polypropylene (PP). A transparent gas laminate packaging laminate according to any one of the preceding claims, characterized in that the polymer for the intermediate layer (15) is an olefin polymer and the polymer for the carrier layer (11, 12) is an oriented polyester or polyamide. A transparent packaging laminate with a gas barrier according to any one of the preceding claims, characterized in that the gas barrier layers (13, 14) of SiOx are located so in the laminate that they face each other. A transparent packaging laminate with gas barrier according to any one of the preceding claims, characterized in that the gas barrier layer (13a) of SiOx is deposited by means of PECVD, wherein x = 1.7 - 2.0 with a thickness of 50 - 500 Å, preferably so - soo Å. A transparent gas laminate packaging laminate according to any one of the preceding claims, characterized in that the thickness of the polymeric carrier layer (11, 12) is from 7 to 30 μm, preferably from 8 to 20 μm, more preferably from 8 to 15 μm. A transparent gas laminate packaging laminate according to any one of the preceding claims, characterized in that the two carrier films (11, 12) of polymer have the same thickness. 10 15 20 25 30 526 512 ll- A transparent gas laminate packaging laminate according to any one of the preceding claims, characterized in that the thickness of the intermediate layer (15) is from 40 to 60 μm and more preferably from 40 to 55 μm. A transparent packaging laminate (10) with gas barrier according to any one of the preceding claims, characterized in that the total thickness of the packaging laminate is from 100 to 150 μm, preferably from 110 to 130 μm. A transparent gas laminate packaging laminate (10) according to any one of the preceding claims, characterized in that the thickness of the intermediate layer (15) is from 40 to 60 μm, the thickness of the polymeric carrier layer (1 1, 12) is from 8 to 15 μm, the thickness of the outer layers of heat-sealable olefin polymer (16, 17) is from 10 to 15 μm and from 18 to 25 μm, respectively, and that the total thickness of the packaging laminate is from 110-130 μm. A transparent gas laminate packaging laminate (10) according to any one of the preceding claims, characterized in that the thickness of the intermediate layer (15) is from 40 to 50 μm, the thickness of the polymeric carrier layer (11, 12) is from 12 to 15 μm and that the thickness of the outer layers of heat-sealable olefin polymer (16, 17) is from 10 to 15 μm and from 18 to 25 μm, respectively, and that the total thickness of the packaging laminate is from 110-130 μm. A transparent gas laminate packaging laminate (10) according to any one of the preceding claims, characterized in that the thickness of the intermediate layer (15) is from 50 to 60 μm, the thickness of the polymeric carrier layer (11, 12) is from 8 to 12 μm and that the thickness of the outer layers of heat-sealable olefin polymer (16, 17) is from 10 to 15 μm and from 18-25 μm, respectively, and that the total thickness of the packaging laminate is from 110-130 μm. A transparent gas laminate packaging laminate according to any one of the preceding claims, characterized in that the intermediate polymer layer 10 (20) is laminated to the adjacent layers (13, 14) of SiOx, by means of a bonding layer (18, 19). A transparent gas barrier packaging laminate according to claim 13, characterized in that the bonding layer (18, 19) comprises a grafted copolymer of alkoxysilane and polyethylene. A packaging container (20), made from a packaging laminate according to any one of claims 1-18. A method (30a) for making a packaging laminate (10) according to any one of claims 1-18, comprising the steps of advancing a first web (331) comprising a first polymeric carrier layer (332) coated with a first gas barrier layer (333). ) of SiOx, and a second web (334) comprising a second polymeric carrier layer (335) coated with a second gas barrier layer (336) of SiOx, facing each other and against an extrusion station (337), laminating the two webs (331, 334 ) to each other by extruding an intermediate polymer layer (338), optionally together with a bonding layer (339) on each side of the intermediate polymer layer (338), between the two webs and compressing them at the extrusion station (337), extruding a first outer layer (342) comprising a heat sealable polyolefin, on the outside of the first or second polymeric carrier layer (332 or 335), at an extrusion station 341, and extruding a second, opposite outer layer (345) comprising a heat liner sealable polyolefin, on the outside of the second of the second or first polymeric backing layer (335 or 332), at an extrusion station 344. A method (30b) for making a packaging laminate (10) according to any one of claims 1-18, comprising the steps of advancing a first web (331) comprising a first polymeric carrier layer (332) coated with a first gas barrier layer ( 333) of SiOx, and a second web (334) comprising a second polymeric carrier layer (335) coated 10 526 512 I !! v with a second gas barrier layer (336) of SiOx, against each other and against an extrusion station (337), laminate the two webs (331, 334) to each other by extruding an intermediate polymer layer (338), optionally together with a bonding layer (339) on each side of the intermediate polymer layer (338), between the two webs and compressing them at the extrusion station (337), by applying heat and pressure laminating a prefabricated film (342 '), comprising at least one layer of a heat-sealable polyolefin, to the outside of the first or second polymeric support layer (332 or 335), at a hot roll nip (341 '), and by applying heat and pressure laminating a prefabricated film (345'), comprising at least one layer of a heat sealable polyolefin, to the outside of the second of the second or first polymeric carrier layer (335 or 332), at a hot roll nip (344 '). A method (30c) of making a packaging laminate (10) according to any one of claims 1-18, comprising the steps of advancing a first web (331) comprising a first polymeric carrier layer (332) coated with a first gas barrier layer (333). ) of SiOx, and a second web (334) comprising a second polymeric carrier layer (335) coated with a second gas barrier layer (336) of SiOx, facing each other and against a hot roll nip (337 '), laminating the two webs (331). , 334) to an intermediate, prefabricated web (338 ') comprising an intermediate polymer layer (338) and, optionally, a bonding layer (339) on each side of the intermediate polymer layer (338), which is advanced between the first and second webs (338'). 331, 334) and applying heat and pressure to the hot roll nip (337 '), by applying heat and pressure laminating a prefabricated film (342'), comprising at least one layer of a heat sealable polyolene, to the outside of the first or second polymer. the carrier layer (332 or 335), at a hot roll nip (341 '), and by applying heat and pressure laminating a prefabricated film (345'), comprising at least one layer of a heat sealable polyolefin, to 526 512 [f] r the outside of the second of the second or first polymeric carrier layer (335 or 332), at a hot roll nip (344 '). A method according to any one of claims 20-22, characterized in that the first and second webs (331, 334) comprising a polymeric carrier layer coated with gas barrier layers of SiOx are advanced towards each other so that the gas barrier layers (333, 336) of SiOx face each other. A method according to any one of claims 20-23, characterized in that the SiOx layers (333, 336) are treated by surface activation treatment, preferably by Corona treatment, before lamination to the adjacent layers.