DE102017111720B4 - Packaging for thermally insulated transport of goods - Google Patents

Abstract

Packaging for the thermally insulated transport of goods containing a box (1) with a lid (2), the material for the base (3), the side walls (4) and the lid (2) being constructed in multiple layers, characterized in that- the bottom (3) consists of a plate detachably connected to the side walls (4), which has a rectangular shape with rounded corners, - the side walls (4) consist of a single rectangular piece, the narrow sides of which are detachable with each other or the side walls by winding of a longer sheet are made, the end of which is attached to the surface of the coil below,- the lid (2) is a separate part which is pushed into the box opening to close the box (1) and there via a frictional connection between is held by the side walls (4) and the lid (2),- the multi-layer material consists of a multi-layer laminated or loosely stacked composite, which from the outside to the inside of the box (1) has the layer sequence (a) one or more air cushion foils, the are laminated with an aluminum foil or have a foil layer metallized with aluminum,(b) one or more single-wall corrugated cardboards with an open flute,(c) one or more air cushion foils, which are laminated with an aluminum foil or have a foil layer metallized with aluminum, and der Bottom (3) consists of layers (a) and (b) and the side walls (4) and the lid (2) consists of layers (a) to (c), the air cushion foils in layers (a) and (c ) are oriented so that the aluminum foils or foil layer metallized with aluminum is on the outside of the composite, and the open corrugated side of the corrugated board is oriented towards the inside of the box in layer (b) of the side walls and downwards in layer (b) of the bottom (3). - the corrugation in the corrugated cardboard of the side walls (4) is aligned in such a way that it runs vertically from the floor (3) in the direction of the crate opening and- at least one cushion (5) made of foil or fleece is placed in the crate (1). coated wood wool and/or wood shavings.

Description

The present invention relates to packaging for the thermally insulated transport of cold or hot goods, which consists of a box with a multi-layer wall material made of corrugated cardboard and bubble wrap and an insert made of a cushion filled with wood wool.

When shipping chilled, deep-frozen or hot goods, in particular food or medicines, it is necessary for the shipping crates to have adequate thermal insulation in order to keep the temperatures of the goods to be shipped below or above specified maximum or minimum temperatures during shipping. In addition, the packaging should provide the necessary shock protection. Another problem that arises with refrigerated shipping is the formation of condensation. The moisture of the trapped volume of air in the shipping box condenses on the cold packaged goods causing adverse effects there. For example, labels or packaging containing paper are softened, inscriptions can run and become illegible, or the packaged goods themselves are damaged by the water. The same applies to the transport of hot food such. B. pizza or pasta dishes, in which escape from the cardboard boxes or aluminum trays covered with a cardboard not inconsiderable amounts of steam.

The most common type of packaging for such forms of transport and shipping is Styrofoam ^® packaging, as it has good stability and thermal insulation and can also be shaped into almost any shape. Packaging made entirely of Styropor ^® can be used, or a standard corrugated cardboard box can be provided with an insert made of Styropor ^® . Disadvantages of such packaging are the energy-intensive production of the plastic, which is obtained from petroleum-based raw materials, and the difficult disposal after use. On the one hand, the used crate is very voluminous in the waste because it cannot be folded up like a simple cardboard box, but at most can be broken into smaller parts, which is associated with considerable soiling with mostly statically charged Styrofoam ^® balls. On the other hand, sorted collection is difficult, which is an essential prerequisite for effective recycling.

Another disadvantage of Styrofoam ^® packaging is its lack of flexibility in filling volume. In order to achieve the most effective possible cooling and low condensation during refrigerated transport, it is desirable to fill the packaging volume as completely as possible with the refrigerated packaged goods or to adjust the volume accordingly to the packaged goods. However, this is not possible with the rigid Styrofoam ^® parts. Furthermore, there is no moisture regulation in these packages. While cardboard still allows a certain moisture exchange with the environment, the Styropor ^® packaging is so impermeable to water vapor that the water collects at the bottom of the box. In addition, condensation can also occur on the outside of the packaging when frozen goods are being packed and the thermal insulation of the packaging is not sufficient to prevent the outside from cooling down.

As an ecological alternative to Styrofoam ^® packaging or packaging parts, for example, EP 0 570 018 B1 discloses a packaging component for impact protection made from compressed straw and/or hay, which is provided with a coating for printability. In contrast to the lightweight boards known from the construction industry made of straw pressed with a binding agent, which is also pre-treated, the use of an external binding agent or adhesive is explicitly avoided there. The binding of the molded parts is achieved solely by pressing the softened straw or hay, which also creates a smooth, printable surface. It is particularly emphasized that the product according to the invention not only has good recyclability, in particular due to the use of straw, which is otherwise little or not used at all, but also helps to protect this resource by doing without wood.

The disadvantages here, however, are a reduced elastic shock absorption due to the pressing, a low water absorption capacity, which is further reduced by the smooth surface, and the risk that dust and straw splinters can be released, especially at the edges of the parts, which soil the packaged goods. The latter is intolerable, especially when transporting food or medicines.

Proceeding from the described disadvantages of the prior art, it was therefore the object of the present invention to provide a packaging that provides shock and temperature protection for packaged chilled or hot goods and at the same time minimizes the formation of condensation. At the same time, the packaging should be easy to recycle and largely do without plastic.

The object is achieved by packaging for the thermally insulated transport of goods and a method for its production according to the independent claims. Advantageous design Device variants are described in the dependent claims.

A packaging according to the invention is preferably used for transporting foodstuffs, medicines and/or organs.

According to the invention, the packaging for the thermally insulated transport of goods includes a box with a lid, the material of which for the bottom, the side walls and the lid is made up of multiple layers. The bottom consists of a plate that is detachably connected to the side walls and has a rectangular shape with rounded corners. The four side walls consist of a single continuous rectangular piece, the narrow sides of which are detachably connected to each other or to the surface of the side wall.

The type of connection is chosen depending on the structure of the material. If the material is first made from individual, stacked or laminated webs in the length of the desired crate circumference, the narrow sides that have been brought together are butt-joined in a detachable manner. If the material is made by winding a longer sheet, the length of which is a multiple of the desired circumference of the box equal to the number of layers desired, the end of the sheet is releasably attached to the surface of the convolution below. Inside the multi-layered material there are continuous webs of material, which leads to a significantly improved stability of the side wall construction, since the strength of the first variant depends on the connecting means of the butt joint, while here the tear strength of the webs of material is decisive. On the other hand, however, there is the somewhat more complex production method, since the material first has to be created by winding it around a winding core that corresponds to the desired dimensions of the box.

The lid of the crate is a separate part that is pushed into the crate opening to close the crate and is held there by a frictional connection between the side walls and the lid. In this way, in contrast to a hinged lid, the box volume can be adjusted by pressing the lid down to the packaged goods, thus minimizing the empty volume. The precisely fitting lid is only held by the tension built up between the edges of the lid and the side walls, whereby the elasticity of the surface of the material of the side walls is used. Compared to conventional packaging, this offers the advantage that the amount of filling material required and the resulting packaging waste can be minimized.

Since the designations for film and paper products are not always used consistently and synonymously in trade and in the prior art, some definitions should first be given here. In the context of this application, a single-wall corrugated cardboard with an open flute is to be understood as meaning a corrugated cardboard which consists of a corrugated paper layer with a second smooth paper cover layer laminated on one side. This is also known commercially as roll corrugated cardboard or open corrugated cardboard. Correspondingly, single-wall corrugated cardboard lined on both sides refers to a corrugated paper layer that has been laminated between two smooth paper cover layers. Two-wall corrugated board is understood to mean corrugated board that consists of two corrugated paper layers that are laminated together with a smooth paper intermediate layer and also have a smooth paper cover layer laminated on both outsides.

An open air-cushion film is to be understood as meaning a two-layer film with a smooth film and a knotted film connected thereto, also referred to commercially as air-cushion film with open knobs or open knob side or simply just air-cushion film. With a covered bubble wrap, the knobbed side of the foil is covered with a third smooth foil.

1. (a) eine oder mehrere Luftpolsterfolien, die mit einer Aluminiumfolie kaschiert sind oder eine mit Aluminium metallisierte Folienschicht aufweisen,
2. (b) eine oder mehrere einwellige Wellpappen mit offener Welle,
3. (c) eine oder mehrere Luftpolsterfolien, die mit einer Aluminiumfolie kaschiert sind oder eine mit Aluminium metallisierte Folienschicht aufweisen,

aufweist, wobei der Boden aus den Schichten (a) und (b) und die Seitenwände und der Deckel aus den Schichten (a) bis (c) besteht, die Luftpolsterfolien in den Schichten (a) und (c) so orientiert sind, dass die Aluminiumfolien oder die mit Aluminium metallisierte Folienschicht auf der Außenseite des Verbunds liegen, und die offene Wellenseite der Wellpappen in Schicht (b) der Seitenwände zur Kisteninnenseite und in Schicht (b) des Bodens nach unten ausgerichtet ist.According to the invention, the multi-layer material for the crate consists of a multi-layer laminated or loosely stacked composite, which has the layer sequence from the outside to the inside of the crate

1. (a) one or more bubble wraps laminated with an aluminum foil or having a foil layer metallized with aluminum,
2. (b) one or more open flute single wall corrugated board,
3. (c) one or more air cushion foils, which are laminated with an aluminum foil or have a foil layer metallized with aluminum,

wherein the bottom consists of layers (a) and (b) and the side walls and the lid consist of layers (a) to (c), the bubble wrap in layers (a) and (c) are oriented such that the aluminum foils or foil layer metallised with aluminum is on the outside of the composite, and the open corrugated side of the corrugated board is oriented towards the inside of the box in layer (b) of the side walls and downwards in layer (b) of the bottom.

If a laminated composite is used, this offers the advantage of improved rigidity. At the same time, however, it is also becoming more difficult to use the material for the side walls, which comes from a long web consists of bending so that it follows the bottom surface in the shape of the rectangle with rounded corners. From a certain number of layers, which depends on the type of paper and corrugation size used, bending is no longer possible and only irregular kinks appear. Then you have to switch to a loosely stacked composite. In general, this is to be preferred anyway, as it means that the lamination step can be dispensed with. For the above-mentioned variant of winding the material into the desired shape, only the loosely laid version can be considered, since additional lamination would be far too complex.

Either metalized foils or aluminum foils can be used for the bubble wraps in layers (a) and (c). Both the metallized foils and the aluminum foils can be used as a smooth foil layer in an open bubble wrap or as a cover foil in a covered bubble wrap. The use of aluminum foil offers better reflection properties for thermal radiation and greater mechanical stability on the outside of the composite material. On the other hand, it is more expensive and not as easy to process as foils metallized with aluminum.

According to the invention, the corrugation in the corrugated cardboard of the side walls of the crate is oriented in such a way that it runs vertically from the bottom towards the crate opening. This offers two advantages. First of all, it allows the side walls to be made in one piece, since with a horizontal arrangement of the corrugations, bending around the rounded corners of the base mold would not be possible. It also ensures that convection can occur within the waves, so that the cold air can collect in the bottom area of the packaging wall, where the cooled packaged goods are also stored.

Finally, according to the invention, at least one cushion made of wood wool and/or wood shavings covered with foil or a fleece is placed in the box. The wood wool and wood shavings are accommodated loosely and uncompressed in the cover. They offer additional padding protection for the goods. In addition, wood wool and wood shavings have a water absorption capacity of up to approx. 150-400% of their own weight, depending on the type of wood used and the size of the shavings. You can thus ensure moisture regulation in the box by absorbing humidity and condensation. If only one wood wool cushion is placed in the packaging, this should be placed on the floor under the packaged goods to ensure optimal absorption of condensation. Depending on the humidity during packaging and the volume of the crate, a wood wool cushion should then be laid on or in as a final layer on the packaged goods under the lid and, if necessary, on the walls of the crate. In contrast to straw or hay, there is no risk of dust or splinters forming with wood wool.

In an advantageous variant of the invention, one or more open and/or covered air cushion foils are arranged between layers (a) and (b), (b) and (c) and between the corrugated cardboard in layer (b), the knobs of the open air cushion foils are arranged towards the inside of the box. The interlayers of bubble wrap reduce the overall weight of the crate, improve thermal insulation and provide better elastic shock protection. On the other hand, the stability of the crate decreases in terms of rigidity and load-bearing capacity as well as puncture resistance. The choice of structure depends on the tolerable packaging weight, the necessary carrying capacity and the type of packaged goods (pointed parts and sharp edges, etc.).

Most preferably, the detachable connection between the base plate and the side walls and/or between the abutting ends of the side walls is made by means of an adhesive tape. This greatly simplifies the disposal of the packaging. By peeling or cutting the adhesive tapes, the floor can be easily separated from the sidewall construction, which can then be laid flat.

To further stiffen the bottom of the box for the purpose of increasing the load-bearing capacity and improving insulation against the footprint of the packaging, a second plate is preferably placed loosely on the bottom plate as an insert shelf, which is smaller on all sides than the bottom plate by the thickness of the side walls, made of the same material in the same orientation as the floor is made and held in place by a frictional connection with the side walls. The shelf is dimensioned so that it can be slid into the bottom of the box with a perfect fit. The shelf is reliably held in place by the elastic surface of the bubble wrap on the outside of the side walls.

Most preferably, the crate has an additional panel made of the same composite material as the crate itself as a room divider, which can be variably positioned and is held in place by a frictional connection with the side walls. This makes it possible to create a subdivision of a larger box for different smaller packaged goods or to take different temperatures of the packaged goods into account. For example, meat products that have a lower storage temperature than fruit need to be packed along with this. Frozen and chilled products can also be shipped together in one box. Since the room divider is only clamped between the side walls, the user is free to position it and can optimally adapt the division of the box to the packaged goods. In this way, waste can also be avoided, since otherwise two separate packages would be required in such cases, with correspondingly more material expenditure.

In a preferred embodiment variant of the packaging, the outer edges of the composite material are sealed with an adhesive tape. This not only keeps a loosely stacked assembly together, but also seals the shafts. As described above, only convection takes place within the waves, but no exchange with the ambient air, so that the insulating effect is improved.

Furthermore, it is preferred if the cover is provided with a loop at one or more corners. This allows the lid to be easily pulled out.

If the wood wool cushion is produced in a foil cover, the foil is most preferably perforated and/or needled. This ensures an improvement in moisture regulation, since the humidity and in particular the condensation can be absorbed more easily in the wood wool or wood shavings. It is therefore not necessary to ensure that the films have a particularly high water vapor permeability. The needling density and the hole size can also influence the pick-up speed, so that fruit or vegetables, for example, do not become too dry on the transport route.

It is also advantageous if the pillow is provided with quilted seams. This reduces bulging of the wood wool filling and influences the thickness of the pillow and its padding properties.

Most preferably, the corrugations of the corrugated cardboard in the base plate, shelf insert and/or cover are each oriented offset by 90°, which leads to improved rigidity.

With the room divider, on the other hand, it is advantageous if its corrugations are evenly aligned horizontally so that it can be bent sideways when the lid is pressed down, thus minimizing the interior volume up to the packaged goods, even if they do not reach the filling height of the unbent room divider.

Furthermore, in the variants of the crates that have additional bubble wrap in the inner layers of the composite, it is advantageous if the base plate, shelf and/or lid also contain one or more double-walled corrugated cardboard in order to help them to increase their rigidity.

The corrugations of the corrugated cardboard are preferably so-called C or B corrugations. The C wave is defined with a wave height of approx. 3.5 mm and a wave spacing of approx. 7.95 mm, the B wave with a wave height of approx. 2.5 mm and a wave spacing of approx. 6, 5mm If double wall corrugated board is used, it is preferably a BC flute, i.e. a combination of the two types of flute mentioned above.

The multilayer composite consists of at least seven layers, preferably seven to 16, most preferably nine to eleven layers. In this way, various demands on the insulation properties of the packaging can be met, which, even with seven layers, clearly surpass that of conventional Styrofoam ^® packaging. The wall thicknesses produced in this way range from approx. 20 mm with seven layers to approx. 57 mm with 16 layers, which varies depending on the type of corrugation selected for the corrugated cardboard and the number of layers of bubble wrap contained. More than 18 layers are generally no longer profitable if one considers the cost of materials and thus the weight of the packaging and the costs in relation to the further improvement in insulation achieved. This would therefore only be considered for special applications with particularly high requirements. On average, the insulating effects achieved are higher by a factor of 2.0 to 2.5 compared to Styropor ^® with an even reduced wall thickness.

Furthermore, it is advantageous if the bottom of the box is additionally provided with a slip lid and/or a slip lid is provided in addition to the lid, the slip lids being made of single-wall corrugated cardboard lined on both sides. The snap-on lid on the bottom, which can be attached either detachably with the help of an adhesive tape or permanently with an adhesive, causes the box to be further stiffened and provides scratch and puncture protection for the air cushion foil that is laminated with aluminum foil or has a foil layer metallized with aluminum outer layer of the box. They become less sensitive to being pushed on the floor or being transported on a conveyor belt.

The snap-on lid as an additional closure of the box, which can then be easily secured with adhesive tape for shipping, allows it to be used the crate volume not required for the heat-insulated transport for the shipment of untempered goods as an accessory pack. The inserted insulating lid separates the lower area with the chilled or hot goods and serves as an intermediate floor on which the other goods can be packed. In combination with the room divider, a shipping solution with three different temperature zones (frozen, chilled and ambient) can be created. When transporting hot food, this offers the option of packing the hot pizza or pasta dishes below and the salad or dessert above them thermally separated.

Furthermore, it is advantageous if an additional layer of soda kraft paper is applied to the outer air cushion film, which can be done by laying or laminating in accordance with the rest of the composite of the multi-layer composite material. The soda kraft paper then acts as additional protection for the bubble wrap against mechanical influences and also gives the packaging the classic cardboard look.

1. a) Umwickeln eines Wickelkerns mit einer rechteckigen Bahn einer oder mehrerer Luftpolsterfolien, die mit einer Aluminiumfolie kaschiert sind oder eine mit Aluminium metallisierte Folienschicht aufweisen, wobei deren Länge dem inneren Umfang der herzustellenden Kiste entspricht, und Verbinden der Stoßfuge der Bahn mittels eines Klebebandes,
2. b) Umwickeln der in Schritt a) geschaffenen Konstruktion mit einer rechteckigen Bahn einer einwelligen Wellpappe mit offener Welle oder einer einwelligen Wellpappe mit offener Welle und einer Luftpolsterfolie zur Herstellung einer mehrlagigen Seitenwandkonstruktion, wobei der Anfang der Bahn mit der Oberfläche der in Schritt a) erzeugten Seitenwandkonstruktion mittels eines Klebebandes verklebt wird,
3. c) Verkleben des Endes der Bahn mit der Oberfläche der in Schritt b) erzeugten Seitenwandkonstruktion mittels eines Klebebandes,
4. d) Verkleben der unteren Kanten der in Schritt c) erzeugten Seitenwandkonstruktion mittels eines Klebebandes,
5. e) Bereitstellen eines mehrlagigen kaschierten oder lose gestapelten Verbunds in rechteckiger Form mit abgerundeten Ecken, Verkleben der Kanten mittels eines Klebebandes zur Herstellung der Bodenplatte und Befestigen der Bodenplatte an der Seitenwandkonstruktion aus Schritt d) durch Verkleben der Außen- und Innenkanten mittels eines Klebebandes zur Herstellung der Kiste,
6. f) Aufbringen einer rechteckigen Bahn einer oder mehrerer Luftpolsterfolien, die mit einer Aluminiumfolie kaschiert sind oder eine mit Aluminium metallisierte Folienschicht aufweisen, auf die Außenseite der Seitenwandkonstruktion der in Schritt e) erzeugten Kiste, Verbinden der Stoßfuge der Bahn mittels eines Klebebandes, Verkleben der unteren Kanten der Bahn mit der Bodenplatte mittels eines Klebebandes und Entfernen des Wickelkerns,
7. g) Verkleben der oberen Kanten der Seitenwandkonstruktion der in Schritt f) erzeugten Kiste,
8. h) Bereitstellen je eines mehrlagigen kaschierten oder lose gestapelten Verbunds in rechteckiger Form mit abgerundeten Ecken für den Einlegeboden und den Deckel, Verkleben der Kanten mittels eines Klebebandes, Einlegen des Einlegebodens in die Kiste und Befestigen einer Schlaufe an einer Ecke des Deckels,
9. i) Befüllen einer Umhüllung aus einer Folie oder einem Vlies mit loser Holzwolle und/oder losen Holzhobelspänen, Verschließen der Umhüllung zur Herstellung eines Kissens und Einlegen des Kissens in die Kiste.

According to the invention, a method for producing a package according to the invention with a composite material in the wound embodiment includes the steps

1. a) wrapping a winding core with a rectangular strip of one or more air cushion foils, which are laminated with an aluminum foil or have a layer of foil metallized with aluminum, the length of which corresponds to the inner circumference of the box to be produced, and connecting the butt joint of the strip using an adhesive tape,
2. b) wrapping the construction created in step a) with a rectangular sheet of single-wall, open-flute corrugated board or single-wall, open-flute corrugated board and bubble wrap to produce a multi-layer sidewall construction, the beginning of the sheet having the surface of the sheets produced in step a). side wall construction is glued using an adhesive tape,
3. c) gluing the end of the web to the surface of the side wall construction produced in step b) using an adhesive tape,
4. d) gluing the lower edges of the side wall construction produced in step c) using an adhesive tape,
5. e) Providing a multi-layer laminated or loosely stacked composite in a rectangular shape with rounded corners, gluing the edges using an adhesive tape to produce the base plate and attaching the base plate to the side wall construction from step d) by gluing the outer and inner edges using an adhesive tape to produce the box,
6. f) Applying a rectangular web of one or more air cushion foils, which are laminated with an aluminum foil or have a foil layer metallized with aluminum, on the outside of the side wall construction of the crate produced in step e), connecting the butt joint of the web with an adhesive tape, gluing the lower one edging the web with the bottom plate using an adhesive tape and removing the winding core,
7. g) gluing the upper edges of the side wall construction of the crate produced in step f),
8. h) providing a multi-layer laminated or loosely stacked composite in a rectangular shape with rounded corners for the shelf and the lid, gluing the edges using adhesive tape, placing the shelf in the box and attaching a loop to one corner of the lid,
9. i) Filling an envelope made of a film or fleece with loose wood shavings and/or loose wood shavings, sealing the envelope to produce a cushion and placing the cushion in the box.

A preferred winding core design consists of four round bars positioned at the corners of a rectangle. In particular, if the rods can be moved along the diagonals of the rectangle, the layered composite can be tightly wound around them very efficiently and then, by moving the rods inwards, it is easier to remove the side wall construction from the winding core, so that damage is avoided.

• 1 zeigt eine perspektivische Ansicht der offenen Kiste (1) mit eingelegtem Kissen (5) und eingesetztem Raumteiler (7).
• 2 zeigt eine perspektivische Ansicht der geschlossenen Kiste (1) mit eingesetztem Deckel (2). In der Ausschnittsvergrößerung sind der Lagenaufbau und der senkrechte Verlauf der Wellen der Wellpappen zu erkennen.
• 3 ist eine seitliche Schnittzeichnung der Kiste (1) mit eingesetztem Deckel (2) und Raumteiler (7), die zwischen die Seitenwände (4) geklemmt sind. Auf dem Boden (3) ist zunächst der Einlegeboden (6) platziert und darüber das Kissen (5).
• 4 a und 4 b bilden zwei Nutzungsbeispiele der Kiste (1) ab. In beiden Beispielen sind der Boden (3) und die Oberseite der Kiste (1) mit einem zusätzlichen Stülpdeckel (9) versehen. In 4a erfolgt eine Nutzung mit zwei Bereichen, einem Raum mit gekühlter Ware (10) und einem Raum mit tiefgekühlter Ware (11), die die gesamte Kiste (1) bis zum oberen Rand ausnutzen. Der Deckel (2) schließt unmittelbar mit dem oberen Rand ab und liegt direkt unter dem Stülpdeckel (9). In 4b erfolgt eine Nutzung mit drei Bereichen. Hier wird nicht das gesamte Kistenvolumen für Kühlware benötigt, sodass der Deckel (2) in der Kiste (1) weiter herunter gedrückt werden kann. Durch die horizontale Anordnung der Wellen in der Wellpappe des Raumteilers (7) ist es möglich, diesen dabei zu biegen, was sinnvoller Weise in Richtung der Tiefkühlware erfolgt. Im Bereich zwischen dem heruntergedrückten Deckel (2) und dem Stülpdeckel (9) entsteht so Platz für einen Raum mit ungekühlter Ware (12).

The structure of a packaging box according to the invention is in the 1 until 4 shown as an example. The representations should not be understood as limiting, but only show one of the possible embodiment variants of the invention.

• 1 shows a perspective view of the open box (1) with an inserted cushion (5) and an inserted room divider (7).
• 2 shows a perspective view of the closed box (1) with the lid (2) inserted. The layered structure and the vertical course of the corrugations of the corrugated board can be seen in the enlarged detail.
• 3 is a side sectional drawing of the box (1) with the lid (2) and room divider (7) inserted between the side walls (4) are clamped. The shelf (6) is placed on the floor (3) and the cushion (5) above it.
• 4 a and 4 b show two usage examples of the box (1). In both examples, the bottom (3) and the top of the box (1) are provided with an additional slip lid (9). In 4a there is a use with two areas, a room with chilled goods (10) and a room with frozen goods (11), which utilize the entire box (1) up to the top edge. The lid (2) closes directly with the upper edge and is located directly under the slip lid (9). In 4b is used with three areas. The entire box volume is not required for refrigerated goods here, so that the lid (2) in the box (1) can be pressed further down. Due to the horizontal arrangement of the corrugations in the corrugated cardboard of the room divider (7), it is possible to bend it, which is sensibly done in the direction of the frozen goods. In the area between the pressed-down lid (2) and the snap-on lid (9), space is created for a space with uncooled goods (12).

comparison measurements

In order to compare the insulating performance of the packaging according to the invention with the prior art, temperature measurements were carried out on packaging equipped with cooling elements. They were each carried out without inserted goods in order to ensure comparability.

An EasyLog USB 6 data logger EA SYLOG-USBTC from Lascar Electronics was used for the measurements. The evaluation was carried out with the Windows Control Software from Lascar Electronics.

Three measurements A - C were carried out on a Styrofoam ^® packaging and two packaging according to the invention. The conditions were as follows:

Measurement A

• - Styrofoam ^® packaging with lid
• - Box volume approx. 22 liters
• - Wall thickness: 30 mm
• - Ambient temperature: approx. 20 °C
• - Cooling elements: 4 gel pads of 600 g each
• - Pre-tempering of the gel cushions to -18 °C
• - Preparation time approx. 5 min (equipping the packaging with the cooling elements and fastening the sensor in the packaging)
• - Duration of measurement: approx. 4 days

The measurement curve obtained is in 5 pictured.

Measurement B

• - Packaging with lid (11-layer composite material)
• - Layer structure:
  1. a) 1 layer of bubble wrap with a foil layer metallized with aluminum,
  2. b) 9 layers of roll corrugated cardboard,
  3. c) 1 layer of bubble wrap with a foil layer metallized with aluminum
• - Box volume approx. 37 liters, reduced to approx. 22 liters with the lid
• - Wall thickness: 30 mm
• - Ambient temperature: approx. 20 °C
• - Cooling elements: 4 gel pads of 600 g each
• - Pre-tempering of the gel cushions to -18 °C
• - Preparation time approx. 5 min (equipping the packaging with the cooling elements and fastening the sensor in the packaging)
• - Duration of measurement: approx. 4 days

The measurement curve obtained is in 6 pictured.

Measurement C

• - Packaging with lid (11-layer composite material)
• - Layer structure:
  1. a) 1 layer of bubble wrap with a foil layer metallized with aluminum,
  2. b) 9 layers of roll corrugated cardboard,
  3. c) 1 layer of bubble wrap with a foil layer metallized with aluminum
• - Box volume approx. 37 liters, reduced to approx. 22 liters with the lid
• - Wall thickness: 30 mm
• - Ambient temperature: approx. 21 °C
• - Cooling elements: 3 kg dry ice
• - Preparation time approx. 5 min (equipping the packaging with the cooling elements and fastening the sensor in the packaging)
• - Measurement duration: approx. 3.75 days

The measurement curve obtained is in 7 pictured.

As can be seen from the curves, the packaging according to the invention is able to keep the temperature level constant below the temperatures required for transporting foodstuffs for a significantly longer time. With the same packaging volume and identical wall thickness and the same number of cooling elements in measurement B, the 1 °C mark is not exceeded even after around four days of measurement, while in the Styropor ^® packaging in measurement A the 1 °C mark is already after around two days is exceeded and after just under three days it is already 15 °C in the packaging. The insulating performance of the packaging according to the invention is therefore better by a factor of around 2 than that of the ^Styropor® packaging from the prior art.

Measurement C shows that the dry ice temperature can be maintained over a period of three days and that the 0 °C limit is only exceeded after approx. 3.5 days.

Reference List

1

Box

2

Lid

3

Floor

4

side walls

5

Pillow

6

shelf

7

room divider

8th

loop

9

slip lid

10

Room with refrigerated goods

11

Room with frozen goods

12

Room with uncooled goods

Claims (16)

Packaging for the thermally insulated transport of goods containing a box (1) with a lid (2), the material for the base (3), the side walls (4) and the lid (2) being made up of multiple layers, characterized in that - the the bottom (3) consists of a plate which is detachably connected to the side walls (4), which has a rectangular shape with rounded corners, - the side walls (4) consist of a single rectangular piece, the narrow sides of which are detachable with one another or the side walls by winding of a longer web, the end of which is attached to the surface of the coil below, - the lid (2) is a separate part which is pushed into the opening of the crate to close the crate (1) and there via a frictional connection between is held by the side walls (4) and the lid (2), - the multi-layer material consists of a multi-layer laminated or loosely stacked composite which, from the outside to the inside of the box (1), has the layer sequence (a) one or more air cushion foils, the are laminated with an aluminum foil or have a foil layer metallized with aluminum, (b) one or more single-wall corrugated cardboards with an open flute, (c) one or more air cushion foils, which are laminated with an aluminum foil or have a foil layer metallized with aluminum, and der Bottom (3) consists of layers (a) and (b) and the side walls (4) and the lid (2) consists of layers (a) to (c), the air cushion foils in layers (a) and (c ) are oriented so that the aluminum foils or foil layer metallized with aluminum is on the outside of the composite, and the open corrugated side of the corrugated board is oriented towards the inside of the box in layer (b) of the side walls and downwards in layer (b) of the bottom (3). - the corrugation in the corrugated cardboard of the side walls (4) is aligned in such a way that it runs vertically from the floor (3) in the direction of the crate opening and - at least one cushion (5) made of foil or fleece is placed in the crate (1). coated wood wool and/or wood shavings. packing after claim 1 , characterized in that between the layers (a) and (b), (b) and (c) and between the corrugated cardboard in layer (b) one or more open and / or covered air cushion foils are arranged, the knobs of open air cushion foils are arranged towards the inside of the box. packing after claim 1 or 2 , characterized in that the detachable connection between the base plate and the side walls (4) and/or between the abutting ends of the side walls (4) takes place by means of an adhesive tape. Packing according to one of Claims 1 until 3 , characterized in that a second plate is placed loosely on the base plate as a shelf (6), which is smaller than the base plate on all sides by the thickness of the side walls (4), made of the same material in the same orientation as the base (3) consists and is held by a frictional connection with the side walls (4). Packing according to one of Claims 1 until 4 , characterized in that the crate (1) has an additional panel made of the same composite material as the crate (1) itself as a room divider (7), which can be variably positioned and over a frictional connection with the side walls (4) is maintained. Packing according to one of Claims 1 until 5 , characterized in that the outer edges of the composite material are sealed with an adhesive tape. Packing according to one of Claims 1 until 6 , characterized in that the lid (2) is provided with a loop (8) at one or more corners. Packing according to one of Claims 1 until 7 , characterized in that the foil of the cushion (5) is perforated and/or needled. Packing according to one of Claims 1 until 8th , characterized in that the cushion (5) is provided with stitching. Packing according to one of Claims 1 until 9 , characterized in that the corrugations of the corrugated cardboard in the base plate, shelf (6) and/or cover (2) are each oriented offset by 90°. Packing according to one of Claims 1 until 10 , characterized in that the corrugations of the corrugated board are C or B corrugations. Packing according to one of Claims 1 until 11 , characterized in that the multi-layer composite consists of at least seven layers, preferably seven to 16, most preferably nine to eleven layers. Packing according to one of claims 2 until 12 , characterized in that one or more double-walled corrugated cardboards are additionally contained in the base plate, shelf (6) and/or cover (2). Packing according to one of Claims 1 until 13 , characterized in that the base (3) of the crate (1) is additionally provided with a slip-on lid (9) and/or in addition to the lid (2) a slip-on lid (9) is also provided, the slip-on lids (9) consisting of single-shaft corrugated cardboard covered on both sides. Method for producing a packaging according to one of Claims 1 until 14 including the steps a) wrapping a winding core with a rectangular strip of one or more air cushion foils, which are laminated with an aluminum foil or have a foil layer metallized with aluminum, the length of which corresponds to the inner circumference of the box to be produced, and connecting the butt joint of the strip by means of a adhesive tape, b) wrapping the construction created in step a) with a rectangular web of single-wall, open-flute corrugated cardboard or single-wall, open-flute corrugated cardboard and bubble wrap to produce a multi-layer sidewall construction, the beginning of the web having the surface of the in step a ) produced sidewall construction is glued using an adhesive tape, c) gluing the end of the web to the surface of the sidewall construction produced in step b) using an adhesive tape, d) gluing the lower edges of the sidewall construction produced in step c) using an adhesive tape, e) providing a multi-layer laminated or loosely stacked composite in a rectangular shape with rounded corners, gluing the edges using an adhesive tape to produce the base plate and attaching the base plate to the side wall construction from step d) by gluing the outer and inner edges using an adhesive tape to form the crate ( 1), f) Applying a rectangular strip of one or more air cushion foils, which are laminated with an aluminum foil or have a foil layer metallized with aluminum, on the outside of the side wall construction of the crate produced in step e) (1), connecting the butt joint of the strip by means of an adhesive tape, gluing the lower edges of the web to the base plate using an adhesive tape and removing the winding core, g) gluing the upper edges of the side wall construction of the box (1) produced in step f), h) providing a multi-layer laminated or loosely stacked composite in a rectangular shape with rounded corners for the shelf (6) and the lid (2), gluing the edges using an adhesive tape, inserting the shelf (6) into the box (1) and attaching a loop (8) to a corner of the lid (2), i) filling an envelope made of a foil or a fleece with loose wood wool and/or loose wood shavings, closing the envelope to produce a cushion (5) and inserting the cushion (5) into the box (1). Use of packaging according to any one of Claims 1 until 14 for the thermally insulated transport of food, medicines and/or organs.

Images