NL2016022B1 - Packaging. - Google Patents

Abstract

Packaging is provided with at least one packaging layer. The packaging layer comprises at least a first and a second plastic infrared transparent layer and at least one infrared reflecting layer located between the infrared transparent layers. The infrared reflective layer comprises a first and a second plastic layer and an intermediate metal layer. The metal layer situated between them is connected to the first plastic layer over substantially the entire surface with the first plastic layer and at a second side remote from the first side over substantially the entire surface to the second plastic layer. Over at least one joining joint by sealing, the first plastic infrared transparent layer is thermally connected to the first plastic layer of the infrared reflective layer and the second plastic layer of the infrared reflective layer is thermally connected to the second plastic infrared transparent layer.

Description

FIELD OF THE INVENTION

The invention relates to a package provided with at least one packaging layer comprising at least a first and a second plastic infrared transparent layer and at least one infrared reflecting layer located between the infrared transparent layers.

BACKGROUND OF THE INVENTION

The Dutch patent NL2012195C describes a multi-layer thermal insulation material which comprises at least a first and a second plastic infrared transparent layer and at least one infrared reflective layer located between the infrared transparent layers. The multi-layer thermal insulation material is suitable for use as packaging material for products, the products packed in the multi-layer thermal insulation material being efficiently protected against heat and cold external influences.

The first and a second plastic infrared transparent layers and the infrared reflective layer are substantially not connected to each other, so that near the edges of the multilayer thermal insulation material the layers can easily be moved away from each other, so that the thermal insulating effect is placed at the location of the edges disturbed.

If the multi-layer thermal insulation material is to be formed into a package such as, for example, a bag or container, parts of the multi-layer thermal insulation material adjacent to edges of the bag or container must be connected to each other.

Until now this has been done by joining the opposite parts to each other by sewing. The disadvantage of sewing is that it requires relatively expensive sewing machines. A further disadvantage is that moisture present in the package, such as water, can leave the package through openings in the stitched seams. The stitched seams also form a cold bridge through which cold or heat can leave the package.

DESCRIPTION OF THE INVENTION

The invention has for its object, inter alia, to provide a package in which the different layers can be connected to each other in a simple manner.

This object is achieved in the packaging according to the invention in that the infrared reflective layer comprises a first and a second plastic layer and an intermediate metal layer, which on a first side covers substantially the entire surface with the first plastic layer and on one of the first side facing away from the first side is connected to the second plastic layer over substantially the entire surface, wherein the first plastic infrared transparent layer is thermally connected to the first plastic layer of the infrared reflecting layer and the second plastic layer of the infrared reflective layer are thermally connected to the second plastic infrared transparent layer.

Because the infrared reflective layer is provided with a plastic layer on both outer surfaces, the infrared reflective layer can be thermally connected to the plastic infrared transparent layers by sealing. The plastics are preferably thermoplastic plastics that can easily be sealed to a joining joint. All layers are firmly connected to each other at the junction point. If the connecting seam extends over an entire side of the package, moisture present in the package cannot leave the package through that side. Moreover, a better thermal insulation is obtained by the connecting seam than by the known stitched seams.

An "infrared transparent layer" is understood to mean a layer with a good transmission of infrared radiation, whereby at least 50% of the infrared radiation is transmitted. With various materials, more than 80 to 95% of the infrared radiation can be transmitted.

An "infrared reflective layer" is understood to mean a layer in which at least 50% of the infrared radiation is reflected. With various materials, such as for example aluminum, more than 80 to 97% of the infrared radiation can be reflected.

Through a combination of infrared transparent layers and infrared reflective layers, a thermally insulating packaging can be manufactured with good thermal properties. The R value of the infrared reflective layers is, for example, 1.4 m2 I </ W, while the R value of the entire packaging layer is, for example, 2 m2 I </ W.

An embodiment of the package according to the invention is characterized in that the packaging layer is folded over a folding line, wherein over the at least one connecting seam also opposite parts of the packaging layer are thermally connected to each other by sealing.

At the location of the connecting seam all layers of both parts are firmly connected to each other.

No connecting seam needs to be provided at the location of the folding line because the parts are already connected to each other there.

Another embodiment of the package according to the invention is characterized in that opposite parts of the package layer are connected to each other via at least two spaced apart connecting seams.

By means of two connecting seams and the folding line, a bag can easily be formed, wherein between the parts not connected via the two connecting seams and the folding line there is an access opening to the bag.

Another embodiment of the package according to the invention is characterized in that the at least one connecting seam or connecting seams extend transversely of the fold line.

A rectangular bag is hereby obtained in a simple manner. On a side of the parts remote from the folding line, the parts are not connected to each other and the parts can be moved away from each other to introduce a product into the bag via the access opening present there.

Another embodiment of the package according to the invention is characterized in that in at least a part over a further connecting seam extending parallel to and at a distance from the folding line, the first plastic infrared transparent layer is thermally sealed with the first plastic layer of the infrared reflective layer and the second plastic layer of the infrared reflective layer is thermally connected to the second plastic infrared transparent layer.

The layers of a part are firmly connected to each other by the further connecting seam. This prevents the layers from moving away from each other. Moreover, the further connecting seam results in a good finish of the package.

Another embodiment of the package according to the invention is characterized in that the first and / or the second plastic comprises infrared transparent layer of bubble wrap.

Such bubble wrap has a good thermal effect and is easily available. The studs are usually filled with air, which is trapped in the studs.

Another embodiment of the package according to the invention is characterized in that the studs of the bubble wrap are directed towards the infrared reflective layer.

The studs here lie against the first or second plastic layer of the infrared reflective layer. Between the bubble wrap and the first or second plastic layer is air that has a good thermal insulating effect.

Another embodiment of the package according to the invention is characterized in that the first and / or the second plastic infrared transparent layer comprises at least one wave layer, which wave layer comprises a number of elongated waves extending parallel to each other.

The waves in the wave layer prevent bending about an axis extending transversely to the waves. This makes the package relatively stiff. If, for example, the waves of the first plastic infrared transparent layer extend transversely to the waves of the second plastic infrared transparent layer, the rigidity is further increased.

Another embodiment of the package according to the invention is characterized in that the waves from the wave layer are directed towards the infrared reflective layer.

The waves here lie against the first or second plastic layer of the infrared reflective layer. Between the waves and the first or second plastic layer is air that has a good thermal insulating effect.

Another embodiment of the package according to the invention is characterized in that each wave extends in a longitudinal direction, the waves being open near the ends.

Because of the open waves, air that is present between the waves and the infrared reflective layer and the base layer can easily flow out and into the waves. This further improves the thermal performance of the insulation material. The open ends of the waves should not be closed by a connecting seam.

For other applications, the waves can be closed off by the connecting seam, so that the air present in the waves forms air cushions, as it were.

Another embodiment of the package according to the invention is characterized in that the metal layer of the infrared reflective layer comprises at least one element from a group comprising copper, aluminum, cobalt, nickel, silver or gold, or an alloy comprising at least one of these elements.

Such materials have a good reflection of infrared radiation, whereby at least 50% of the infrared radiation is reflected. With various materials, such as for example aluminum, lean more than 80 to 97% of the infrared radiation is reflected

Another embodiment of the package according to the invention is characterized in that the metal layer is deposited on the first plastic layer, while the second plastic layer is applied to the metal layer of the infrared reflective layer.

A relatively thin infrared reflective layer can be obtained by vapor deposition.

The second plastic layer can be rolled, glued or applied to the metal layer in any other suitable manner.

Another embodiment of the package according to the invention is characterized in that the metal layer of the infrared reflective layer has a thickness of 3-50 microns.

The cost of the metal is limited by such a layer thickness.

Another embodiment of the package according to the invention is characterized in that the first plastic layer of the infrared reflective layer has a thickness of 6-12 microns.

Such a layer thickness is sufficient to be able to apply a layer of metal to the first plastic layer.

Another embodiment of the package according to the invention is characterized in that the second plastic layer of the infrared reflective layer has a thickness of 30-50 micrometres.

Such a layer thickness can easily be applied to the metal.

Another embodiment of the package according to the invention is characterized in that the first and / or a second plastic infrared transparent layer is made of a polymeric plastic comprising at least one polymeric material from a group comprising polystyrene, polyethylene (PE), polyethylene terephthalate (PET) ), other polyester, fluoropolymers such as poly-tetra-fluoro-ethylene (PTFE, Teflon ™), ethylene-tetrafluoroethylene copolymer (ETFE), polyvinyl chloride (PVC), nylon, polypropylene (PP) or other polyamides.

Such materials have a good transmission of infrared radiation, whereby at least 50% of the infrared radiation is transmitted. With various materials, more than 80 to 95% of the infrared radiation can be transmitted.

Another embodiment of the package according to the invention is characterized in that the at least one first and a second plastic infrared transparent layer and the at least one infrared reflecting layer located between the infrared transparent layers are only connected to each other over the at least one connecting seam.

Because the layers are substantially not connected to each other, virtually no heat transfer takes place through mutual contact of the layers. The connecting seams keep the layers sufficiently in place and it is easily prevented that the infrared reflective layer located between the first and a second plastic infrared transparent layers displaces and drops downwards due to gravity during a vertical orientation of the package.

SHORT FIGURE DESCRIPTION

The invention will be further elucidated with reference to the drawing, in which:

Figure 1 shows a perspective view of a bag-forming package according to the invention,

Figure 2 shows a cross-section of a first embodiment of the package at the location of an upper connecting seam,

Figure 3 shows a cross-section of an infrared reflective layer of the package shown in Figure 1,

Figure 4 shows a cross-section of a first embodiment of the package at the location of a left and right connecting seam,

Figure 5 shows a cross-section of a second embodiment of the package according to the invention at the location of a connecting seam,

Figures 6A and 6b show respectively a top view and a cross-section of a bubble wrap of a package according to the invention,

Figures yA and 7b show a top view and a cross-section, respectively, of a corrugated layer of a package according to the invention.

In the figures, corresponding parts are provided with the same reference numeral.

DETAILED FIGURE DESCRIPTION

Figure 1 shows a package 1 according to the invention that is manufactured from a package layer 2 that is folded over a folding line 3, whereby two opposite parts 4, 5 are obtained. The parts 4, 5 are each provided with an upper connecting seam 6, 7 on a side remote from the folding line 3. The parts 4, 5 are further mutually connected over left and right connecting seams 8, 9 extending transversely to the folding line 3.

A product can be provided in the package 1 via an opening located between the parts 4, 5 and the connecting seams 6, 7 thereof.

Figure 2 shows a first embodiment of a packaging layer 2 comprising a first and a second plastic infrared transparent layer 13, 14 and an infrared reflecting layer 15 located between the infrared transparent layers 13, 14.

The first and a second plastic infrared transparent layers 13, 14 each comprise bubble wrap 16 which comprises a base foil 17 and studs 18 disposed thereon. The structure of the bubble wrap 16 is clearly visible in Figures 6A and 6B.

The studs 18 of the bubble wrap 16 face the infrared reflective layer 15.

Figure 3 shows a cross-section of the infrared reflective layer 15. The infrared reflective layer 15 comprises a first plastic layer 19, and for example metal layer 20 applied to the first plastic layer 19 and a second plastic layer 21 applied to the metal layer 20. The metal layer 20 is connected on a first side 22 over the entire surface with the first plastic layer 19. The metal layer 20 is connected on a second side 23 remote from the first side over the entire surface with the second plastic layer 21.

Because a plastic layer 19, 20 is located on either side of the metal layer 20, it is possible to connect the first and a second plastic infrared transparent layers 13, 14 and the infrared reflective layer 15 to each other by sealing, the upper connecting seams 6 7 are formed. These connecting seams 6, 7 are shown in figure 2. Heat is introduced during sealing, so that the thermoplastic layers of plastic become softened, melt slightly and simultaneously pressed against each other. After solidification of the plastic, the layers 13, 14, 15 are connected to each other at the location of the connecting seam 6, 7.

Figure 4 shows a cross-section of the package 2 at the location of a left and right connecting seam 8, 9. The left and right connecting seam 8, 9 is formed by placing the parts 4, 5 against each other and near the edges of the parts 4 5, simultaneously the second plastic infrared transparent layer 14, the infrared reflective layer 15 and the first plastic infrared transparent layer 13 of the first part 4, the first plastic infrared transparent layer 13, the infrared reflective layer 15 and the second plastic infrared transparent layer 14 of the second part 5 by sealing together.

During the sealing and forming of the connecting seams 6, 7, 8, 9, the studs 18 are broken and pressed flat.

Figure 5 shows a cross-section of a second embodiment of a package 1 according to the invention at the location of a connecting seam 31. The package 1 is manufactured from a packaging layer 32 which is folded over a folding line 3, whereby two opposite parts 34, 35 are obtained. The packaging layer 32 comprises a first plastic infrared transparent layer 13, an infrared reflective layer 15, a second plastic infrared transparent layer 14, a third plastic infrared transparent layer 33, and an infrared reflective layer 36. The first, second and third plastic infrared transparent layers 13, 14, 33 each comprise bubble film 16. The second and third plastic infrared transparent layers 14, 33 are abutting with the base films 17. The studs 18 of the bubble wrap 16 of the second plastic infrared transparent layer 14 face the infrared reflective layer 15. The studs 18 of the bubble wrap 16 of the third plastic infrared transparent layer 33 face the infrared reflective layer 36.

The infrared reflective layer 36 can have the same structure as the infrared reflective layer 15. However, it is also possible that the infrared reflective layer 36 is provided with the plastic layer 19 and a plastic layer 19 facing it towards the third plastic infrared transparent layer 33 only. applied metal layer 20 and that it does not comprise a plastic layer 21.

The connecting seam 31 is formed by placing the parts 34, 35 against each other and at the same time near the edges of the parts 34, 35 the layers 36, 33, 14, 15, 13 of the first part 34 and the layers 13, 15, 14, 33, 36 by connecting together.

During sealing and forming of the connecting seam 31, the studs 18 are broken and pressed flat.

Figure 7 shows another embodiment of a plastic infrared transparent layer 43, which comprises a base layer 44 and a wave layer 45 applied thereto. The wave layer 45 is provided with a number of elongated waves 46 extending parallel to each other. When used in the package 1, the waves 46 of the wave layer 45 are preferably directed towards the infrared reflective layer 15, 35. Each wave 46 extends in a longitudinal direction, whereby the waves 46 may be open near the ends. If open ends are desired, the connecting seams should extend parallel to the longitudinal direction of the waves. If the connecting seams extend obliquely or transversely to the longitudinal direction of the waves, the open ends of the waves will be closed.

A package according to the invention comprises at least two plastic infrared transparent layers 43. The waves 46 of the two plastic infrared transparent layers 43 can extend in the same direction or, for example, extend transversely to each other. The greater the angle between the waves 46 of the two layers 43, the stiffer the package becomes.

The metal layer 20 of the infrared reflective layer 15, 35 comprises at least one element comprising a group comprising copper, aluminum, cobalt, nickel, silver or gold, or an alloy comprising at least one of these elements. Aluminum is particularly suitable for its good reflective properties, processability and price.

The metal layer 20 is vapor-deposited on the first plastic layer, while the second plastic layer is applied to the metal layer of the infrared reflective layer.

The first plastic layer 19 has a thickness of 6-12 microns, the metal layer 20 of the infrared reflective layer 15 has a thickness of 3-10 microns, and the second plastic layer 21 has a thickness of 30-50 microns.

In an infrared-reflecting layer 15 tested in practice, the first plastic layer 19 was 8 microns, the metal layer 20 was 4 microns and the second plastic layer 21 was 38 microns thick. The plastic layers 19, 21 were made from polyethylene (PE). In an alternative with the same layer thicknesses, the plastic was BOPP (Biaxially oriented polypropylene) or PET. Other plastics, for example those from which the plastics infrared transparent layers 13, 14, 33 are made, are also conceivable.

The plastic infrared transparent layer 13, 14, 33 is made from a polymeric plastic that comprises at least one polymeric material from a group comprising polystyrene, polyethylene (PE), polyethylene terephthalate (PET), other polyester, fluoropolymers such as poly-tetra-fluor - ethylene (PTFE, Teflon ™), ethylene-tetrafluoroethylene copolymer (ETFE), polyvinyl chloride (PVC), nylon, polypropylene (PP) or other polyamides.

The base layer 44 of the infrared transparent layer 43 has a thickness of 0.01 to 0.2 millimeters. The waves 46 of the wave layer 45 of the infrared transparent layer 43 have a height of preferably at least 3 millimeters in a direction extending transversely to the base layer 44.

The waves 46 of the wave layer 45 of the infrared transparent layer 43 are preferably spaced at least 4 millimeters apart.

It is also possible to provide the packaging layer with even more infrared transparent layers and infrared reflective layers.

It is also possible to manufacture other packages such as containers, boxes with the packaging layer according to the invention, wherein parts to be joined together near edges are sealed to each other.

LIST OF REFERENCE FIGURES 1 package 2 packaging layer 3 folding line 4 part 5 part 6 connecting seam 7 connecting seam 8 connecting seam 9 connecting seam 13 infrared transparent layer 14 transparent layer 15 infrared reflective layer 16 bubble film 17 base film 18 studs 19 plastic layer 20 metal layer 21 plastic layer 22 first side 23 second side 31 connecting seam 32 packaging layer 33 transparent layer 34 part 35 part 36 infrared reflective layer 43 infrared transparent layer 44 base layer 45 wave layer 46 wave

Claims (16)

ï. Packaging (1) provided with at least one packaging layer (2) comprising at least a first and a second plastic infrared transparent layer (13, 14) and at least one infrared reflecting layer (15) located between the infrared transparent layers, characterized that the infrared reflective layer (15) comprises a first and a second plastic layer (19, 21) and an intermediate metal layer (20), which on a first side (22) covers substantially the entire surface with the first plastic layer (19) and on a second side (23) remote from the first side is connected over substantially the entire surface to the second plastic layer (21), wherein at least one connecting seam (6, 7, 8, 9, 31) is connected by sealing the first plastic infrared transparent layer (13) thermally with the first plastic layer (19) of the infrared reflective layer (15) and the second plastic layer (21) of the infrared reflective layer (15) thermally with the second plastic infrared transparent layer (14) are connected. Packaging (1) according to claim 1, characterized in that the packaging layer is folded over a folding line (3), wherein over the at least one connecting seam also opposite parts (4, 5, 34, 35) of sealing the packaging layer are thermally connected to each other. A package according to claim 2, characterized in that opposite parts (4, 5, 34, 35) of the package layer are connected to each other via at least two spaced apart connecting seams (8, 9, 31). A package (ι) according to claim 2 or 3, characterized in that the at least one connecting seam (8, 9, 31) or connecting seams (8, 9, 31) extend transversely to the fold line (3). Packaging according to claim 2, 3 or 4, characterized in that the first plastics material is sealed through at least a part over a further connecting seam (8, 9, 31) extending parallel to and at a distance from the fold line. infrared transparent layer (13) is thermally connected to the first plastic layer of the infrared reflective layer and the second plastic layer (21) of the infrared reflective layer (15) to the second plastic infrared transparent layer (14) thermally. Packaging according to one of the preceding claims, characterized in that the first and / or the second plastic infrared transparent layer (13, 14) comprises bubble wrap (16). 7. Packaging according to claim 6, characterized in that the studs of the bubble wrap (16) are directed towards the infrared reflective layer (15). Packaging according to one of the preceding claims 1-5, characterized in that the first and / or the second plastic infrared transparent layer (13, 14) comprises at least one wave layer (45), which wave layer (45) comprises a plurality of longitudinal waves (46) extending parallel to each other. 9. Packaging according to claim 8, characterized in that the waves (46) of the wave layer (45) are directed towards the infrared reflective layer (15). ίο. Packaging (ï) according to claim 8 or 9, characterized in that each wave (46) extends in a longitudinal direction, the waves (46) being open near the ends. A package (1) according to any one of the preceding claims, characterized in that the metal layer (20) of the infrared reflective layer (15) comprises at least one element from a group comprising copper, aluminum, cobalt, nickel, silver or gold, or an alloy comprising at least one of these elements. A package ()) according to any one of the preceding claims, characterized in that the metal layer (20) is vapor-deposited on the first plastic layer (13), while the second plastic layer (14) is deposited on the metal layer (20) of the infrared reflective layer (15) is provided. A package (t) according to any one of the preceding claims, characterized in that the metal layer (20) of the infrared reflective layer (15) has a thickness of 3-50 microns. A package (1) according to any one of the preceding claims, characterized in that the first plastic layer (13) of the infrared reflective layer (15) has a thickness of 6-12 microns. The package (1) according to any of the preceding claims, characterized in that the second plastic layer (14) of the infrared reflective layer (15) has a thickness of 30-50 micrometres. A package ()) according to any one of the preceding claims, characterized in that the first and / or a second plastic infrared transparent layer (13, 14) is made of a polymeric plastic comprising at least one polymeric material from a group comprising polystyrol, polyethylene (PE), polyethylene terephthalate (PET), other polyesters, fluoropolymers such as poly-tetra-fluoro-ethylene (PTFE, Teflon ™), ethylene-tetrafluoroethylene copolymer (ETFE), polyvinyl chloride (PVC), nylon, polypropylene (PP) or other polyamides. A package ()) according to any one of the preceding claims, characterized in that the at least one first and a second plastic infrared transparent layer (13, 14) and the at least one infrared reflective layer (15) located between the infrared transparent layers ) are connected to each other only over the at least one connecting seam (31).