Insulating packaging and method for producing same

Abstract

The invention relates to an insulating packaging (100) having an outer layer (110) of paper and an inner layer (130) of heat-insulating material. According to the invention, the inner layer (130) is formed of comminuted, in particular fibrised paper or card material, wherein the inner layer (130) is at least partially connected to the outer layer (110) by means of a fluid which in particular has water and / or a dispersion adhesive. The invention also relates to an insulating packaging (100), in which the outer layer (110) has at least two parts (111, 112) which surround the inner layer (130), wherein the at least two parts (111, 112) of the outer layer (110) are connected by means of at least one material-bonded embossing (151, 152). The invention further relates to a method for producing an insulating packaging.

Description

[0001] SCAG Consulting GmbH Rottenbucher Str. 15, 86807 Buchloe

[0002] Insulated packaging and process for its manufacture

[0003] TECHNICAL FIELD

[0004] The present invention relates to an insulating packaging, in particular for shipping foodstuffs, and a method for its production.

[0005] STATE OF THE ART

[0006] CH 540828 A discloses a shipping bag in which an outer layer of paper is bonded to a plastic inner lining. The bubble wrap preferred as the inner lining also has a certain insulating effect, but for recycling purposes, it must be separated from the outer paper layer by a laborious tearing process.

[0007] DE 10 2021 120 900 A1 discloses an insulating packaging consisting of a front cushion and a back cushion, whose pocket-shaped receiving bags are filled with a fibrous material containing, for example, paper scraps. The front and back cushions are sewn, glued, or crimped together at the side edges using gears.

[0008] Based on the above-mentioned prior art, the object of the present invention is to provide an insulating packaging that offers good thermal insulation and allows for simple, environmentally friendly disposal after use. Furthermore, a method for producing such a packaging is to be provided.

[0009] DISCLOSURE OF THE INVENTION

[0010] The object is achieved with an insulating packaging according to claim 1 and a method according to claim 16. Further developments of the invention are the subject of the dependent claims. According to the invention, an insulating packaging with at least one outer layer made of paper and at least one inner layer made of heat-insulating material is characterized in that the inner layer made of a shredded, in particular fiberized, paper or cardboard material can be or is connected at least partially to the outer layer by means of a fluid. The fluid preferably comprises water. Preferably, the fluid can additionally comprise a particularly very small amount of surfactants. Particularly preferably, the fluid comprises water and a dispersion agent, and optionally a particularly very small amount of surfactants for reducing the surface tension of the water.The fluid can significantly improve the insulating properties of the insulating packaging, as slipping of the inner layer relative to the outer layer can be effectively prevented.

[0011] In this application, the term "outer layer" refers to any layer of paper that surrounds the inner layer of insulating material, regardless of its position in the finished insulating packaging. Thus, "outer layers" are also arranged inside the finished insulating packaging after they have been folded or joined. In addition, any protruding parts of the paper layers enveloping the inner layer that protrude beyond the inner layer at the sides or ends are also considered to be part of the outer layer.

[0012] Preferably, the fluid is applied over the entire surface of the outer layer. For example, the fluid is applied over an area of ​​at least 50%, preferably at least 75%, and particularly preferably at least 90%, of the surface area of ​​the insulating packaging, which is determined by the length and width of the insulating packaging.

[0013] It has proven particularly advantageous for the fluid to be formed from a mixture of water and a dispersion lubricant, which has a ratio of approximately 2 to 30 parts by volume of water, in particular approximately 21 parts by volume of water to approximately 1 part by volume of dispersion lubricant. This facilitates handling during further processing of the insulated packaging due to a more homogeneous application of the insulating material and prevents the insulating material of the inner layer from moving unevenly in certain areas during use of the insulated packaging, which could therefore result in a lack of insulation in other areas. By wetting the outer layer with the fluid, slipping of the inner layer relative to the outer layer is effectively prevented, so that the insulated packaging has a largely constant insulating effect in all areas over its entire service life.

[0014] According to an advantageous development of the invention, the inner layer is formed from a shredded, in particular fiberized, paper or cardboard material, the particles of which have a particle size of 0.5 mm to 3.5 mm for at least 40%, preferably at least 50%, and more preferably approximately 80% of the total amount. The inner layer provides by far the best thermal insulation at this particle size.

[0015] Furthermore, at least 30%, in particular at least 35%, and preferably 50% of the total amount preferably have a particle size of 3 mm to 5 mm. Due to this particle size and the surface structure of the particles resulting from the preferred production of the particles in a whirlwind mill, an ideal entanglement of neighboring particles with one another occurs, which, by effectively preventing mutual movement of the particles within the inner layer, also contributes to a permanently homogeneous layer thickness and thus to an improved insulating effect.

[0016] The material of the inner layer is particularly preferably produced in a cyclone mill, with all dust being removed advantageously via a cyclone separator. Dust is defined as particles smaller than 0.125 mm in size, particularly particles smaller than 0.1 mm in size. The material of the inner layer is therefore ready for use without chemical flame retardants, which is particularly important when the insulated packaging is used for shipping food.

[0017] As an alternative to the use of shredded paper or cardboard, the use of "tissue material" would be conceivable. "Tissue material" refers to a single- or multi-layer natural fiber cloth creped at high temperatures on a creping cylinder. The layers can also contain small air chambers created by additional embossing. Since the outer and inner layers are made of paper material, the insulating packaging according to the invention can be directly returned to the paper recycling process after use without further separation.

[0018] Preferably, the inner layer has a density of 40 to 70 kg / m 3 , especially from 50 to 65 kg / m 3This density allows for optimal insulation performance of the insulating packaging. To achieve this density, the material of the inner layer is pre-compacted before being applied to the outer layer. The aforementioned density ensures optimal insulation performance through the ratio of particles to the air trapped between the particles.

[0019] The thermal conductivity of the inner layer is preferably between 0.03 and 0.05 W / mK, in particular 0.039 W / mK, and is thus in the range of excellent insulation values, as known from insulation materials made from other materials in the construction industry.

[0020] Preferably, the surfaces of the outer layers facing the goods to be contained in the finished insulating packaging are perforated, particularly by means of needles. Through the resulting small openings, any condensation that may form can penetrate through the inner outer layer to the inner layer and be absorbed by it, so that the receiving space of the finished insulating packaging, and thus also the transported goods contained therein, remain dry.

[0021] Particularly preferred in conjunction with the features described above, but also advantageous on its own, is that the outer layer has at least two parts that at least largely and preferably completely surround the inner layer, wherein the at least two parts of the outer layer are connected by means of at least one, preferably two, material-locking embossments. In particular, in conjunction with moistening the outer layer before applying the inner layer, the material-locking embossments ensure that the inner layer can no longer slip relative to the outer layer after application. The material-locking embossments thus also contribute to an improved, homogeneous insulating effect of the insulating packaging over its entire extent. The material-locking embossing creates a very high tear-out strength, which has been confirmed in tests with up to 25 kg.As a result, the insulating packaging according to the invention is also very suitable for heavier, particularly frozen or chilled goods.

[0022] In a preferred embodiment of the present invention, the material-locking embossing is designed as knurling. The knurling interlocks two superimposed layers of the outer layer with their fibers by means of the intermeshing gears. Pre-moistening the areas of the form-locking embossing ensures an even more intensive bond. Moistening can be achieved using a fluid, which in particular contains water and / or a dispersion lubricant, and optionally a very small amount of surfactants. The surfactants serve to reduce the surface tension of the water, thus enabling a more homogeneous fluid application.

[0023] According to an advantageous development of the invention, it is provided that the inner layer is applied to the first part of the outer layer and the second part of the outer layer is designed to be foldable by 180° over the first part of the outer layer at a second fold line, wherein the second part of the outer layer, in the folded state, covers the inner layer partially or completely on the side facing away from the first part of the outer layer.

[0024] In a first embodiment, the fold line can be formed transversely to a paper web forming the outer layer, and in a second embodiment, in the longitudinal direction thereof. With a fold line arranged centrally in the longitudinal direction of the paper web forming the outer layer, according to this second embodiment, only slightly less than half the width of the paper web is provided with the inner layer and then the other half is folded over to form a tubular intermediate product and closed near the open edge by a material-fitting embossing, in particular by longitudinal knurling. As a result, the inner layer is completely surrounded by the outer layer, so that no particles and no paper dust that may still be present from the shredded paper or cardboard material can escape.According to an alternative to a first and second part of the outer layer produced by folding a single paper web, the first and second parts of the outer layer can also be formed, as a third embodiment, from two separate paper webs that enclose the inner layer between them. In this case, a fold line between the first and second part of the outer layer is replaced by a transverse, material-locking embossing, which is preferably formed by transverse knurling. At least one such transverse knurling is also introduced into the tubular intermediate product of the second embodiment described in the previous paragraph during its further processing into an insulating packaging.

[0025] According to a further advantageous embodiment of the invention, a third part of the outer layer is designed as an overlapping part along a first fold line, which runs parallel to the second fold line according to the first embodiment, and is foldable by 180° over the first part. The overlapping part covers the inner layer, in particular in regions, and is covered by the second part, in particular completely. This variant represents a paper-saving version of an insulating packaging according to the invention, in which a tight wrapping of the inner layer is achieved without transverse knurling.

[0026] The first part of the outer layer and at least the second part of the outer layer with the inner layer located between them are preferably folded along a third fold line to form a pocket-shaped receiving space, wherein the third fold line is preferably arranged centrally with respect to the longitudinal extent of the inner layer and aligned parallel to the second, transverse fold line. The pocket-shaped receiving space is thus surrounded on all sides by at least two layers of the outer layer and an inner layer located between these two layers, thus providing excellent insulation against heat penetration.

[0027] Particularly advantageously, at least one, preferably two, of the material-locking embossments, in particular as longitudinal knurling, connects the first part and the second part of the outer layer close to a lateral edge of the insulating packaging but outside the inner layer, running parallel to the direction of a longitudinal axis of the insulating packaging. The material-locking embossments also ensure high tear-out resistance of the insulating packaging laterally. The tear-out resistance of the insulating packaging can be further increased if at least one material-locking embossment, running transversely to a longitudinal axis of the insulating packaging, connects the first part and the second part of the outer layer, in particular as transverse knurling.

[0028] All material-bonded embossings achieve a further tear-out strength increased by a factor of about 4 if the embossed areas are wetted with a fluid before embossing, which fluid is preferably water, in particular a mixture of water with surfactants or, particularly advantageously, additionally with dispersion adhesive, in particular in a ratio of 1 part dispersion adhesive to 21 parts water. Surfactants are only used in very small quantities to reduce the surface tension of the water (comparable to a drop of dishwashing liquid). The surfactants enable a more homogeneous application of the fluid and its better penetration into the outer layer. Wetting causes the embossed areas on the outer layer to become slightly wavy, so that this advantageous pre-treatment is also visible on the finished product.

[0029] An additional increase in tear resistance is achieved by folding at least one side strip arranged near the lateral edges of the insulating packaging and having a material-fit embossing onto a back of the insulating packaging and bonding it to this at least locally using an adhesive, in particular dispersion adhesive. A mixture of water and dispersion adhesive can be advantageously used, in which the mixing ratio between water and dispersion adhesive is preferably 3 parts water to 1 part dispersion adhesive, more preferably 2 parts water to 1 part dispersion adhesive, particularly preferably 1 part water to 1 part dispersion adhesive. The dispersion adhesive is furthermore preferably the same dispersion adhesive that is used to bond the inner layer to the outer layer.

[0030] Insulated packaging with high stability is preferably also characterized by the outer layer being made of Clupak paper or kraft paper. A method according to the invention for producing an insulated packaging is characterized by the following process steps:

[0031] Laying out an outer layer in one plane,

[0032] Applying a fluid, which in particular comprises water and / or a dispersion lubricant, to a first part of the outer layer and at least to a partial area of ​​a second part of the outer layer,

[0033] Applying an inner layer of heat-insulating material to at least a portion of the first part of the outer layer provided with the fluid, preferably folding an overlapping part arranged on the first part of the outer layer at a first fold line over at least a portion of the inner layer,

[0034] Applying a particularly second part of the outer layer over the first part of the outer layer and preferably the overlap part,

[0035] Folding the package consisting of the first part of the outer layer, the inner layer and at least the second part of the outer layer around a third fold line preferably running centrally in the inner layer parallel to the second fold line to form a pocket-shaped receiving space,

[0036] introducing at least one material-locking embossing which connects the first part and the second part of the outer layer parallel to both lateral edges, but outside the inner layer in the longitudinal direction of the insulating packaging,

[0037] Folding at least one side strip provided with a material-locking embossing onto the back of the insulating packaging and at least partially gluing the side strip to the back by means of an adhesive, in particular a dispersion adhesive optionally diluted with water.

[0038] According to a first alternative, the second part of the outer layer is applied over the first part of the outer layer and the overlapping part is formed by folding the second part of the outer layer along a second fold line.

[0039] According to a second alternative, which is particularly preferred for continuous, machine-based production in large quantities, the second part of the outer layer is applied over the first part of the outer layer and the inner layer arranged thereon by laying on a separate paper web forming the second part, which is connected to the first part of the outer layer by a material-locking embossing running transversely to the longitudinal axis of the insulating packaging outside the inner layer.

[0040] According to a further alternative, instead of turning over an overlapping part, a further material-locking embossing is provided which runs transversely to the longitudinal axis and by means of which the first part is connected to the second part of the outer layer outside the inner layer.

[0041] It is particularly advantageous to wet the areas of the material-bonded embossing with a fluid, particularly water or water-diluted dispersion lubricant, before the embossing is applied. Wetting ensures a more intensive bond between the paper layers through better interlacing of the fibers during the embossing process, particularly through knurling.

[0042] BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Further features, advantages, and embodiments of the invention will become apparent from the following description of embodiments of an insulating packaging and a method particularly suitable for its production, based on the figures. It shows:

[0044] Fig. 1A is a plan view of the back of a finished insulating packaging before filling and closing a closure flap,

[0045] Fig. 1 B is a plan view of the front of a finished insulating packaging before filling and closing the closure flap,

[0046] Fig. 2 is a plan view of the spread out first part and second part of an outer layer of an insulating packaging according to Figure 1 with an inner layer of insulating material applied to the first part,

[0047] Fig. 3 is a side view of the insulating packaging during production after folding an overlapping part over the inner layer and folding the second part of the outer layer over it, Fig. 4 is a side view of the insulating packaging during production after folding a package from the first part and second part of the outer layer with the inner layer in between to form a receiving space, but before introducing the material-fitting embossing along the side edges,

[0048] Fig. 5 shows an alternative to Figure 3, in which the second part of the outer layer is formed by a separate paper web, which is connected to the first part of the outer layer by means of additional material-locking embossings, and

[0049] Fig. 6 shows an alternative embodiment in which the first part and the second part of the outer layer are formed from a single paper web folded in the longitudinal direction, which, after application of the inner layer to a first part, is folded over this and turned over and is closed as an intermediate product to form a tube by means of a material-locking embossing running on one side in the longitudinal direction.

[0050] EMBODIMENTS OF THE INVENTION

[0051] Fig. 1A shows a plan view of the back of a finished insulating packaging 100. Two side strips 103, 104 running parallel to a longitudinal axis L are each provided with a material-locking embossment 151, 152 and folded over onto the back of the insulating packaging 100. The folded side strips 103, 104 are bonded to the back of the insulating packaging 100 by several spaced-apart adhesive dots or a continuous or sequentially interrupted adhesive bead. The adhesive dots or the adhesive bead are not shown and are preferably formed by a water-soluble dispersion adhesive.

[0052] The front of the insulating packaging 100, in contrast, is smooth, as shown in Fig. 1B, with a closure flap 122 connected to an outer layer 110 via a fold line 123. After the finished insulating packaging 100 has been filled, the closure flap 122 is folded over at the fold line 123 and connected to the front of the insulating packaging 100, for example by an adhesive strip. Figure 2 shows a first alternative for producing an insulating packaging 100 shown in Figures 1A and 1B. For this purpose, a section of a single continuous paper web is laid out in a plane as the outer layer 110 and preferably cut to the required length. The outer layer 110 has a first part 111 and a second part 112.

[0053] In the example shown, an overlapping part 113 adjoins the left side of the first part 111. The length of the overlapping part 113 in the direction of the longitudinal axis L is preferably approximately one-quarter to one-half the length of the first part 111.

[0054] On the right side of the second part 112 there is a closure flap 122 which is later folded onto the front side of the finished insulating packaging 100 after it has been filled in order to close it and is fixed there, for example by means of an adhesive strip (not shown).

[0055] A spraying area 118, shown in dash-dotted lines, extends in the direction of the longitudinal axis L over the central regions of the overlapping part 113, the first part 111, and approximately half of the second part 112, with one edge strip 103 or 104 preferably remaining free. The spraying area 118 can be delimited during production by a first auxiliary frame that can be placed on the paper web of the outer layer 110, wherein the outer layer 110 is uniformly moistened with a fluid in the spraying area by means of a spray device (not shown). This fluid is formed from pure water, a water-surfactant mixture, or a mixture of water and a dispersion lubricant, for example, in a mixing ratio of 6 parts water to 1 part dispersion lubricant. The fluid layers 119 wetted by the fluid are indicated in Figure 3 by fine dotted lines.

[0056] After moistening the spray area 118, the first subframe is removed, and instead, a second subframe (also not shown) is placed on the central region of the first part 111. A second subframe, for example, approximately 20 mm thick, made of paper or cardboard material, preferably shredded using a cyclone mill, is applied to the subframe as a heat-insulating inner layer 130. Because the inner layer 130 is located entirely within the spray area 118, at least the lower layer of the inner layer 130 is bonded to the first part 111 of the outer layer 110. This largely prevents subsequent slippage of the inner layer 130.

[0057] After applying the inner layer 130, the second subframe is removed, and then the overlap part 113 is folded over the left part of the inner layer 130 along a first fold line 114 running transversely to the longitudinal axis L. Since the overlap part 113 is also moistened by the fluid in the spray area 118, the inner layer 130 also bonds to the inside of the overlap part 113 at its upper side.

[0058] In the next step, the second part 112 of the outer layer 110 is folded over the inner layer 130 located on the first part 111 and the overlapping part 113 partially located thereon along a second fold line 115 running transversely to the longitudinal axis L. Since the part of the second part 112 of the outer layer 110 adjacent to the second fold line 115 is also wetted by the fluid applied in the spray area 118, this part also bonds to the upper side of the inner layer 130.

[0059] As can be seen in Figure 3, a portion of the second part 112 of the outer layer 110, which is folded over the overlapping part 113, is preferably also wetted with the fluid. This creates a connection between the overlapping part 113 and the second part 112 of the outer layer 110 to securely hold the inner layer 130.

[0060] As shown in Figure 3, after folding in the overlap part 113 and turning over the second part 112, the inner layer 130 is completely surrounded by the outer layer 110 and fixed at the top and bottom by the fluid layers 119.

[0061] Subsequently, the package shown in Figure 3, comprising the first part 111, inner layer 130, overlapping part 113, and second part 112, is folded along a third fold line 125 running approximately in the middle of the inner layer 130 transversely to the longitudinal axis L to form a pocket-shaped receiving space 140, which is shown in Figure 4. As can be clearly seen from Figure 4, the receiving space 140 is surrounded downwards and on both sides by at least three layers of the outer layer 110 and the inner layer 130 embedded between them. A single layer remains, namely the closure flap 122, which projects beyond the receiving space 140 and serves to close the receiving space 140 after the receiving space 140 has been filled with the goods to be transported. For this purpose, it is attached to the front of the insulating packaging 100 after folding over, for example by means of an adhesive strip.

[0062] The receiving space 140 is laterally closed by the two longitudinally extending material-locking embossments 151 and 152 on the side strips 103 and 104, respectively. After being closed by the material-locking embossments 151 and 152, the inner layer 130 is completely enclosed.

[0063] Figure 5 shows a second variant of an insulating packaging 100, in which an intermediate product corresponding to Figure 3 is produced by joining a first part 111 of an outer layer made of a first, preferably continuously moving paper web and a second part 112 of an outer layer made of a second, likewise preferably continuously moving paper web, including an inner layer 130 whose structure corresponds to the first embodiment. The parts 111 and 112, trimmed to the desired size, are preferably joined together at their front and rear ends in the longitudinal direction by means of a transverse, material-locking embossment 116 and 117, respectively, which is produced, for example, during a brief, cyclically provided stop in the conveyance of the paper webs by a transverse knurling device or continuously by a transverse knurling device adapted to the longitudinal movement, following the paper web.The closure tab 122 protrudes, for example, beyond one of the embossments 116.

[0064] After folding around the transverse fold line 125, a package corresponding to Figure 4 is again created with a receiving space 140, which is then laterally closed by two longitudinally running material-locking embossments 151 and 152 on side strips 103 and 104 arranged analogously to Figure 1. The material-locking embossments 151 and 152, preferably designed as longitudinal knurls, can be created after the inner layer 130 has been inserted between the paper webs of the outer layers 111 and 112, or before the transverse material-locking embossment 116 and 117 are created. It is understood that in this second variant, too, both surfaces of the two parts 111 and 112 that come into contact with the inner layer 130 can be wetted beforehand. The areas of the material-locking embossings 116 or 117 and 151 or152 are wetted with a fluid such as water, a water-surfactant mixture or a mixture of water and a dispersion lubricant before the embossing, which is preferably produced by knurling.

[0065] As shown in Figure 1, the side strips 103 and 104 can be folded over onto the back of the insulating packaging 100 to further increase the tear resistance and can be glued to it in spots or strips.

[0066] In a third variant, shown in Figure 6, a first part 111A and a second part 111B of the outer layer 110 are produced by folding and folding over a single paper web lengthwise along a longitudinal axis L, in particular running centrally, after the inner layer 130 has been applied to a part of the half 111A. Subsequently, both parts 111A and 111B are joined together near their open outer sides by means of a longitudinal, material-locking embossing 153 to form a tubular intermediate product. This intermediate product is then folded, again analogously to Figure 4, along a fold line 125 running transversely in the center of the inner layer 130 to form a package with a receiving space 140 and closed on the long sides by means of material-locking embossing.In this third variant, both surfaces of the two parts 111A and 111B that come into contact with the inner layer 130 are also wetted in advance, as are the areas of the material-locking embossing 153.

[0067] The outer layer 110, 111, 111A, 111B, 112 is preferably made of a Clupak paper or a kraft paper with a basis weight of 60 to 80 g / m 2 formed.

[0068] Preferably, the surfaces of the outer layers 110, 111, 111A, 111B, 112 that face the goods to be accommodated on the finished insulating packaging 100 are perforated using needles (not shown). Through the resulting small openings (not shown), any condensation that may form can penetrate through the inner outer layer 110, 111, 111A, 111B, 112 to the inner layer 130 and is absorbed by it, so that the receiving space 140 of the finished insulating packaging 100, and thus also the transported goods accommodated therein, remain dry.

[0069] The material of the inner layer 130 is generally preferably produced from shredded paper or cardboard material by dry shredding using a micro-impact mill or a cyclone mill. This produces particles with a size of approximately 0.5 mm to 4 mm. A preferred composition of the inner layer is one in which at least 50% of the total mass has a particle size of 1 mm to 3.5 mm. All particles smaller than 0.5 mm are removed as paper dust, preferably during the grinding process, by a cyclone separator, so that the inner layer 130 can be used safely even without the addition of chemical flame retardants. Due to the coarser shredding, the resulting particles interlock better, so that the inner layer 130 holds together well and individual particles do not slip within the surrounding outer layer 110.By reducing paper dust, the working conditions when applying the inner layer 130 are also significantly improved.

[0070] The inner layer 130 preferably has a density of 30 to 70 kg / m 3 , especially from 50 to 65 kg / m 3 This density is created by pre-compacting the material of the inner layer 130 after the grinding process and before applying or applying the inner layer 130 to the outer layer 110, 111, 111A, 111B, 112, and ensures an optimal insulating effect through the ratio of particles to air trapped between the particles.

[0071] The thermal conductivity of the inner layer 130 is preferably between 0.03 and 0.05 W / mK, in particular 0.039 W / mK.

[0072] The thickness of the inner layer 130 is approximately 20 mm in its raw state, so that a finished insulating packaging 100 has a thickness of approximately 35 to 40 mm after slight compression or pre-compaction of the inner layer 130. The layer thickness can also vary depending on the season, outside temperature, temperature of the intended transport container or loading space, intended transported goods, and planned transport duration. If particularly high demands are placed on the stability of the insulating packaging and / or its insulating properties, it can, if necessary, also have two or more outer layers, between which additional inner layers of insulating material can be provided if necessary. Likewise, somewhat smaller, inner pocket-shaped insulating packaging can be completely surrounded by one or more slightly larger, outer pocket-shaped insulating packaging to multiply the insulating effect.

[0073] The method according to the invention can be carried out manually with several workstations connected in series. In this case, it is useful to use auxiliary tools such as stops, gauges, or auxiliary frames when cutting the paper web, applying the fluid in the spraying area, and applying the inner layer 130. However, fully automated production is also possible, in which the transport and folding of the paper webs, the application of the fluids and adhesives, and the insertion of the inner layer 130 are carried out continuously by machine according to precise coordinates. The inner layer 130 can then, for example, be prepared in a package-like manner to the side of the main flow direction and pushed or placed onto the outer layer 110 by means of laterally arranged pushers or grippers.

[0074] Particularly preferred for continuous machine production is the use of a lower paper web as the first part 111 of the outer layer 110, onto which, after wetting the spray areas 118, the material of the inner layer 130 is applied, which in turn is covered by an upper paper web fed from above and wetted in the spray area 118 as the second part 112 of the outer layer 110. Subsequently, the material-locking embossments 151, 152 are created as transverse knurls and the material-locking embossments 116, 117 are created as longitudinal knurls in the previously wetted areas, whereby the order of the longitudinal and transverse knurls can be freely selected.

[0075] A further embodiment preferably suitable for continuous machine production is an insulating packaging 100 according to Figure 6. In this case, a tubular intermediate product is produced from a single paper web by preferably folding it centrally around a longitudinal axis L and folding the second part 111 B of the width of the paper web over the first part 111 A of the width of the paper web with the inner layer 130 interposed, the open edge of which is closed by a single continuous material-locking embossing 153, in particular designed as a longitudinal knurling.

[0076] An inventive insulating packaging 100 is not only suitable for shipping chilled or heated food or other goods, such as chilled pharmaceuticals or medical supplies, but also for shipping sensitive, sharp-edged or fragile goods, for which envelopes with a plastic bubble lining have previously been used.

[0077] LIST OF REFERENCE SYMBOLS

[0078] 100 insulated packaging

[0079] 101 side margins (out of 100)

[0080] 102 side margins (out of 100)

[0081] 103 shoulders (out of 100)

[0082] 104 side stripes (out of 100)

[0083] 110 outer layer

[0084] 111 first part (of the outer layer 110)

[0085] 111A first part (of the outer layer 110)

[0086] 111 B second part (of the outer layer 110)

[0087] 112 second part (of the outer layer 110)

[0088] 113 Overlap part (to 111)

[0089] 114 (first) fold line (at 113)

[0090] 115 (second) fold line (between 111 and 112)

[0091] 116 material-locking embossing (cross knurling)

[0092] 117 material-locking embossing (cross knurling)

[0093] 118 Spray area

[0094] 119 Fluid layer

[0095] 122 closure tab (on 112)

[0096] 123 fold line (at 122)

[0097] 125 (third) fold line (in the middle of 130)

[0098] 130 inner layer

[0099] 140 recording room

[0100] 151 material-fitting embossing (longitudinal knurling)

[0101] 152 material-fitting embossing (longitudinal knurling)

[0102] 153 material-fitting embossing (longitudinal knurling)

[0103] L Longitudinal axis (of 100)

Claims

CLAIMS 1. Insulated packaging (100) with at least one outer layer (110) made of paper and at least one inner layer (130) made of heat-insulating material, wherein the inner layer (130) is formed from a shredded, in particular fiberized, paper or cardboard material, characterized in that the inner layer (130) is at least partially connected to the outer layer (110) by means of a fluid which in particular comprises water and / or a dispersion lubricant.

2. Insulated packaging according to claim 1, characterized in that the fluid is formed by a mixture of water and a dispersion lubricant, which has a ratio of about 15 to 30 parts by volume of water, in particular 21 parts by volume of water to about 1 part by volume of dispersion lubricant.

3. Insulating packaging (100) according to claim 1 or 2, characterized in that the particles forming the shredded paper or cardboard material have a particle size of 1 mm to 3.5 mm for at least 50% of the total amount.

4. Insulating packaging according to at least one of the preceding claims, characterized in that the inner layer (130) has a density of 40 to 70 kg / m 3 , especially from 50 to 65 kg / m 3 has.

5. Insulating packaging (100) according to at least one of the preceding claims, characterized in that the thermal conductivity of the inner layer (130) is between 0.03 and 0.05 W / mK, in particular 0.039 W / mK.

6. Insulating packaging (100) according to the preamble of claim 1, in particular according to one of the preceding claims, characterized in that the outer layer (110) has at least two parts (111, 112; 111 A, 111 B) which at least largely surround the inner layer (130), wherein the inner layer (130) is formed from a shredded, in particular fiberized, paper or cardboard material, wherein the at least two parts (111, 112; 111 A, 111 B) of the outer layer (110) are connected by means of at least one material-locking embossing (116, 117, 151, 152, 153), and wherein the areas of the material-locking Before the embossing is applied, the embossings must be wetted with a fluid, in particular water or dispersion lubricant diluted with water.

7. Insulating packaging (100) according to claim 6, characterized in that the material-locking embossing (116, 117, 151, 152, 153) is designed as knurling.

8. Insulating packaging (100) according to at least one of claims 6 or 7, characterized in that the inner layer (130) is applied to the first part (111; 111 A) of the outer layer (110) and the second part (112; 111 B) of the outer layer (110) is designed to be foldable by 180° over the first part (110; 111 A) at a second fold line (115), wherein the second part (112; 111 B) in the folded state covers the inner layer (130) partially or completely on the side facing away from the first part (111; 111 A).

9. Insulating packaging (100) according to at least one of claims 6 to 8, characterized in that the first part (111) of the outer layer (110) and the second part (112) of the outer layer (110) are formed by two separate paper webs which enclose the inner layer (130) between them.

10. Insulating packaging (100) according to at least one of claims 6 to 9, characterized in that a third part of the outer layer (110) is designed as an overlapping part (113) at a first fold line (114) which runs parallel to the second fold line (115) and is foldable by 180° over the first part (111), wherein the overlapping part (113) covers the inner layer (130), in particular in regions, and is covered by the second part (112), in particular completely.

11. Insulating packaging (100) according to one of claims 6 to 9, characterized in that the first part (111; 111A) of the outer layer (110) and at least the second part (112; 111B) of the outer layer (110) with the inner layer (130) lying between them are folded along a third fold line (125) to form a pocket-shaped receiving space (140), wherein the third fold line (125) is preferably arranged centrally with respect to the longitudinal extent of the inner layer (130) and is aligned parallel to the second fold line (115).

12. Insulating packaging (100) according to one of claims 6 to 11, characterized in that at least one of the material-locking embossments (151, 152, 153) connects the first part (111; 111A) and the second part (112; 111B) of the outer layer (110) close to a lateral edge (101, 102) of the insulating packaging (100), but outside the inner layer (130) running parallel to the direction of a longitudinal axis (L) of the insulating packaging (100).

13. Insulating packaging (100) according to one of claims 6 to 12, characterized in that at least one material-locking embossing (116, 117) extending transversely to a longitudinal axis (L) of the insulating packaging (100) connects the first part (111; 111 A) and the second part (112; 111 B) of the outer layer (110).

14. Insulating packaging (100) according to one of claims 6 to 13, characterized in that at least one side strip (103, 104) arranged near lateral edges (101, 102) of the insulating packaging (100) and having a material-locking embossing (151, 152, 153) is folded over onto a back side of the insulating packaging (100) and is glued to it at least in places by means of an adhesive, in particular a dispersion adhesive optionally mixed with water.

15. Insulating packaging (100) according to one of the preceding claims, characterized in that the outer layer (110) is made of a Clupak paper or a kraft paper with a basis weight of 60 to 80 g / m 2 is formed.

16. A method for producing an insulating packaging (100), in particular according to one of the preceding claims, characterized by the following method steps Laying out an outer layer (110) in a plane, Applying a fluid, which in particular comprises water and / or a dispersion lubricant, to a first part (111) of the outer layer (110) and at least to a partial area of ​​a second part (112) of the outer layer (110), Applying an inner layer (130) of heat-insulating material to at least a portion of the first part (111) of the outer layer (110) provided with the fluid, Folding an overlap part (113) arranged on the first part (111) of the outer layer at a first fold line (114) over at least a part of the inner layer (130), Applying a second part (112) of the outer layer (110) over the first part (111) of the outer layer (110) and the overlap part (113), Folding the package consisting of the first part (111) of the outer layer (110), the inner layer (130) and at least the second part (112) of the outer layer (110) around a third fold line (125) preferably running centrally in the inner layer (130) parallel to the second fold line (115) to form a receiving space (140), introducing at least one material-locking embossing (151, 152) which connects the first part (111) and the second part (112) of the outer layer (110) parallel to both lateral edges (101, 102), but outside the inner layer (130) in the longitudinal direction of the insulating packaging (100), Folding at least one side strip (103, 104) provided with a material-locking embossing (151, 152) onto the back of the insulating packaging (100) and at least partially bonding the side strip (103, 104) to the back by means of an adhesive, in particular a dispersion adhesive diluted with water.

17. A method for producing an insulating packaging (100) according to claim 16, characterized in that the application of the second part (112) of the outer layer (110) over the first part (111) of the outer layer (110) and the overlap part (113) is carried out by folding the second part (112) of the outer layer (110) at a second fold line (115).

18. A method for producing an insulating packaging (100) according to claim 16, characterized in that the application of the second part (112) of the outer layer (110) over the first part (111) of the outer layer (110) and the overlapping part (113) is carried out by laying on a separate paper web forming the second part (112), which is connected to the first part (111) of the outer layer (110) by a material-locking embossing (116) running transversely to the longitudinal axis (L) of the insulating packaging (100) outside the inner layer (130).

19. A method for producing an insulating packaging (100) according to claim 16, characterized in that instead of folding over an overlapping part (113), a material-locking embossing (117) extending transversely to the longitudinal axis (L) is provided, by means of which the first part (111) is connected to the second part (112) of the outer layer (110) outside the inner layer (130).

20. A method for producing an insulating packaging (100) according to claims 16 to 19, characterized in that the areas of the material-locking embossments (116, 117, 151, 152, 153) are wetted with a liquid, in particular water, a water-surfactant mixture and / or a water-soluble dispersion adhesive, before the embossments (116, 117, 151, 152, 153) are introduced.

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