EP4134329A1 - Récipient thermique - Google Patents

Récipient thermique Download PDF

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Publication number
EP4134329A1
EP4134329A1 EP22182890.8A EP22182890A EP4134329A1 EP 4134329 A1 EP4134329 A1 EP 4134329A1 EP 22182890 A EP22182890 A EP 22182890A EP 4134329 A1 EP4134329 A1 EP 4134329A1
Authority
EP
European Patent Office
Prior art keywords
paper
shreds
bag
fibrous material
thermal container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22182890.8A
Other languages
German (de)
English (en)
Other versions
EP4134329C0 (fr
EP4134329B1 (fr
Inventor
Georg Scheffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Profuemed Karlheinz Lohr E K
Original Assignee
Profuemed Karlheinz Lohr E K
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Profuemed Karlheinz Lohr E K filed Critical Profuemed Karlheinz Lohr E K
Publication of EP4134329A1 publication Critical patent/EP4134329A1/fr
Application granted granted Critical
Publication of EP4134329C0 publication Critical patent/EP4134329C0/fr
Publication of EP4134329B1 publication Critical patent/EP4134329B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3888—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags
    • B65D81/3897—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags formed of different materials, e.g. laminated or foam filling between walls

Definitions

  • the present invention relates to a thermos container which has at least one flat back cushion and a flat front cushion which extends in another plane above the back cushion and which are connected to one another on opposite side edges and on another side edge of the thermos container, are designed in one piece or via a connecting piece merge into one another, so that a cavity is formed between the back cushion and the front cushion, the back cushion and the front cushion each being formed from at least one bag or at least one compartment and a fibrous material located in the at least one bag or the at least one compartment, wherein the fibrous material has a stack of a plurality of individual layers of creped fibrous material lying flat on top of one another.
  • the well-known thermal container has the advantage that it is ecologically safe to recycle due to the fibrous material predominantly used for this purpose.
  • the insulated container for various applications or in the case of ambient temperatures that deviate greatly from the temperature of the packaged goods, it would be desirable for the insulated container to be able to maintain its temperature even longer.
  • the pamphlet DE 20 2019 003 407 U1 describes packaging made of corrugated cardboard for receiving and/or transporting temperature-sensitive products.
  • the corrugated cardboard is folded into a cuboid carton, the side walls of the carton being formed by two spaced walls between which a thermal insulating material is accommodated.
  • the thermal insulating material can be, for example, a tubular bag containing shredded paper.
  • Such a thermal container is used to maintain the temperature of a packaged item placed in the box over a specific period of time.
  • the cooling of the packaged goods placed therein, such as foodstuffs, medicines or blood preserves that are to be kept cool, can thus be maintained over a specific time within a specific temperature window by means of the thermal container.
  • the well-known thermal container is relatively complex to manufacture.
  • the size and shape of the tubular bag must be precisely adapted to the cuboid interior formed between the walls of the side walls, and the tubular bag must then be attached on the inside with an adhesive. This is already difficult because the paper shreds slip in the tubular bag.
  • thermos container which has at least one flat back cushion and a flat front cushion which extends in another plane above the back cushion and which are connected to one another on opposite side edges and on another side edge of the thermos container, are designed in one piece or via a connecting piece merge into one another, having so that a cavity is formed between the back cushion and the front cushion, wherein the back cushion and the front cushion are each formed from at least one bag or at least one compartment and a fibrous material located in the at least one bag or the at least one compartment, the fibrous material having a stack of a plurality of individual layers of creped fibrous material lying flat on top of one another, dissolved, wherein the fibrous material also has at least one non-separately wrapped random layer of loose paper shreds and/or hemp shreds arranged between two of the individual layers, which are formed from randomly lying fibers and whose crepe height is ⁇ 0.3 mm and ⁇ 1 mm .
  • the thermal container according to the invention is suitable as a cool bag.
  • the at least one object whose temperature is to be maintained can advantageously be placed in the cavity formed between the back cushion and the front cushion connected thereto. Thereafter, the cavity can be suitably sealed.
  • the creped fiber material individual layers of the back cushion and the front cushion already bring about a particularly advantageous thermal insulation of the at least one object placed in the thermal container from the environment. This is achieved in particular by the air inclusions or air gaps formed between the individual layers of creped fibrous material lying flat on top of one another. Because of the creping of the individual layers, each of the individual layers has a plurality of peaks and valleys, with air collecting in the valleys. Since the creping is never identical from one layer to the next and the individual layers are not stacked on top of one another or pressed into one another with a perfect fit, the valleys of the individual layer above do not fit, or not completely, into the valleys of the individual layer below, so that in any case an air gap is maintained.
  • a random layer of paper shreds and/or hemp shreds ie a layer of paper shreds and/or hemp shreds lying in a disordered manner, is arranged between at least two of the creped individual layers.
  • the paper shreds are individual paper elements that are not connected to form a closed layer
  • the hemp shreds are individual, not to one another are hemp elements connected to form a closed layer, for example in the side walls of the in the document DE 20 2019 003 407 U1 described thermal container slip, and are not held together separately by a bag or the like in the present invention
  • the paper shreds and / or hemp shreds remain surprisingly largely in their respective position between the individual layers in the present invention.
  • At least these two creped individual layers arranged on both sides of the paper and/or hemp snippet layer, but preferably all of the creped individual layers, have a crepe height of ⁇ 0.3 mm, so that between the respective individual layers or at least between the paper and and/or hemp snippet layer and the individual layers lying on both sides of the paper and/or hemp snippet layer can collect a lot of air, which serves for thermal insulation.
  • the paper and/or hemp shreds are disordered, i. H. they have the most varied orientations within the random position. They can therefore lie on top of one another and/or form tangles and/or cantilever in the direction of the adjacent creped individual layer.
  • each of the individual layers preferably has a crepe height of ⁇ 0.3 mm, preferably ⁇ 0.4 mm, particularly preferably ⁇ 0.6 mm, in one embodiment 0.65 mm. It is therefore a so-called high crepe.
  • either 4 or 8 of the creped individual layers are stacked one on top of the other without interposed paper and/or hemp shreds, i.e. stacks of 4 or 8 are formed, with a layer of the paper and / or hemp snippets is arranged.
  • the thermal bag 16 has creped single plies with one or three plies of paper and/or hemp shreds.
  • the pouch or compartment also has a protective function for the fibrous material contained therein.
  • the fibrous material used in the present invention both for the creped individual layers and for the shreds of paper which can be a primary fibrous material such as cellulose, mechanical pulp or half-cellulose, and/or a secondary fibrous material such as fibrous material obtained from waste paper, as well as
  • the hemp used for the hemp snippets has the advantage that it is a natural material that is harmless to the environment, which is easily recyclable and already has low heat conduction and therefore good thermal insulation properties.
  • At least the two individual layers that lie on both sides of the respective layer of paper and/or hemp snippets are different from paper or those in the publication DE 20 2019 003 407 U1 used corrugated cardboard, formed from randomly lying fibers. This means that these individual layers, which are also creped, have a higher surface roughness than paper or corrugated cardboard and thus hold the paper and/or hemp shreds particularly well.
  • the design of the fibrous material used leads to an advantageous softness and volume, which ensure that the packaged goods can be safely stored and transported in the thermal container.
  • the thermal container according to the invention can be easily stacked, but can also be used as a shopping bag.
  • a coefficient of static friction existing between one of the individual layers and a layer of the paper from which the paper shreds are formed is at least by a factor of 1.1, preferably at least by a factor of 1.25, particularly preferably at least by a factor of 1.34, than the coefficient of static friction between two layers of paper from which the paper shreds are formed.
  • the scraps of paper adhere particularly well to the creped individual layers and therefore hardly slip.
  • the shreds of paper adhere better to the creped individual layers than they do, for example, to cardboard, as is the case, for example, in the publication DE 20 2019 003 407 U1 used to form the sidewalls of the package would adhere.
  • the shreds of paper adhere even more to the creped individual layers than they do to the tubular bag made of polyethylene film, in which they are placed in the publication DE 20 2019 003 407 U1 are brought in would be liable.
  • the coefficient of static friction between a ply of the paper from which the paper shreds are formed and one of the creped monoplies used in the present invention is at least 1.9 times greater than the coefficient of static friction between a ply of the paper , from which the scraps of paper are formed, and that in the reference DE 20 2019 003 407 U1 used polyethylene film.
  • the coefficient of static friction in the present invention is between one layer under the same measurement conditions the paper from which the paper shreds are formed and one of the creped single plies at least 0.5, preferably at 0.55 and more preferably above 0.6.
  • the individual layers of the creped fibrous material preferably have a crepe factor of at least 40%, in a special embodiment of 44%.
  • the latter crepe factor corresponds to an elongation of 80%.
  • the at least one bag in the present invention is made of a fleece made of thermoplastic material, it offers good moisture protection for the fibrous material inside, which has good absorbency. This is particularly the case when the web is a spunbonded polypropylene web.
  • the at least one bag encases the fibrous material in the manner of a tube. Side edges of the at least one bag can also be sewn.
  • the at least one bag or the at least one compartment of the back cushion and the at least one bag or the at least one compartment of the front cushion are made of paper.
  • the entire thermal container consists of ecologically recyclable material, namely paper and fibrous material.
  • the at least one bag or the at least one compartment of the back cushion and the at least one bag or the at least one compartment of the front cushion are formed by an inner paper bag placed in an outer paper bag, with each the fibrous material is between an outside of the inner paper bag and an inside of the outer paper bag.
  • the inner paper bag is thus inserted into the outer paper bag and the fibrous material is inserted between the material of the inner paper bag and the material of the outer paper bag at least on the front and back of this embodiment of the thermal container according to the invention.
  • the respective packaged goods which typically have to be kept cool, can then be placed in the inner paper bag.
  • the inner paper bag and the outer paper bag are connected to one another, enclosing the fibrous material.
  • the fibrous material on the inside cannot slip out of the gap between the outer paper bag and the inner paper bag.
  • the thermal container according to the invention is particularly ecologically valuable if the creped fibrous material is made from cellulose wadding that is made from at least 90% recycled waste paper with waste paper qualities in accordance with DIN EN 643.
  • the paper shreds are made from shredded or chopped paper or the hemp shreds are made from shredded or chopped hemp.
  • paper that has been shredded for data protection reasons can be reused in a sensible way.
  • the dimensions of paper shredded with conventional shredders are optimal in order to achieve good temperature retention with the thermal container according to the invention.
  • the paper and/or hemp shreds have a width ranging from 0.5 cm to 1 cm.
  • the length of the paper and/or hemp shreds can be the same or different.
  • the paper and/or hemp snippets can be up to 4 cm long or even longer. The longer the paper and/or hemp snippets, the better the thermal properties of the thermal container according to the invention.
  • FIG 1 shows schematically a possible embodiment of a thermal container 1 according to the invention in a plan view.
  • the thermal container 1 is a cooling bag for transport purposes.
  • a cool bag can, for example, have an outside width of 300 to 600 mm and an outside length of 300 to 600 mm.
  • the closure flap of the cool bag can have a length of 50 to 120 mm. Of course, other dimensions are also possible.
  • the thermal container 1 can also be used to keep objects warm.
  • thermal container 1 is off figure 1 shown open with a packaged item 15 placed therein in a plan view.
  • the thermal container 1 has a flat back cushion 2 and a flat front cushion 3 .
  • the back cushion 2 is connected to the front cushion 3 at opposite side edges 4, 5 of the thermal container 1. In the illustrated embodiment, this connection is realized by seams 16, 17 running along the side edges 4, 5.
  • this connection can be made alone or in combination with the seams 16, 17 by gluing and/or squeezing the material.
  • the back cushion 2 and the front cushion 3 are formed from the same web of material designed in the form of a bag band. Therefore, the back cushion 2 is formed in one piece with the front cushion 3 on a further side edge 6 of the thermal container 1 .
  • the material of the back cushion 2 thus merges directly into the material of the front cushion 3 at the side edge 6 , which can form, for example, the bottom edge of a bag.
  • the back cushion 2 and the front cushion 3 can also be formed separately and connected to one another at the side edge 6 . Furthermore, it is possible that in other embodiments of the present invention at least one piece of material is provided on the side edges 4, 5 and/or 6 between the back cushion 2 and the front cushion 3 and associated with these.
  • the piece of material can be designed, for example, in the form of a strip or web.
  • a cavity 7 is formed between the back cushion 2 and the front cushion 3, into which, as shown in FIG figure 2 it can be seen that the packaged goods 15 are introduced.
  • the illustrated embodiment has the back cushion 2 on one side over the front cushion 3 protruding back cushion section 21.
  • a closure flap can also be attached to the back cushion 2 on one side.
  • the protruding back cushion portion 21 or the locking tab is closed as indicated by the arrow A in figure 2 is indicated schematically folded to close the cavity 7 on a surface of the front cushion 3 and directly or indirectly connected to it.
  • the overhanging back cushion section 21 or the closure flap can be glued to the front cushion 3 by means of adhesive lines.
  • adhesive nubs can be used for this.
  • the back cushion 2 and the front cushion 3 each have a bag 8 .
  • the bag 8 encloses a fibrous material 9 like a hose.
  • at least one compartment 18 can be provided, in which the fibrous material 9 is located.
  • the compartment 18 is not formed all the way around the fibrous material 9, but can be closed in advantageous variants of the invention.
  • the fibrous material 9 is used, which in figure 3 is shown schematically in a sectional side view that is not true to scale.
  • the fibrous material 9 consists of a stack of a plurality of individual layers 91 of creped fibrous material lying flat on top of one another.
  • the special feature of the creped fiber used here is that it is so-called high crepe.
  • the creped fibrous material used therefore has a particularly high crepe height d of ⁇ 0.3 mm, for example ⁇ 0.35 mm, per individual layer 91 .
  • the crepe height d is even greater, such as ⁇ 0.5 mm or even ⁇ 0.65 mm.
  • the crepe height d of 0.65 mm leads to an elongation of 80% in the material used, which is cellulose wadding in the exemplary embodiment shown, which in turn corresponds to a creping factor of 44%.
  • High crepe is a very thin material, which can also have holes.
  • the basis weight of the creped furnish used is 23 grams per square meter, but may be different in other embodiments of the invention.
  • the coefficient of static friction between one of the individual layers 91 and a layer of the paper from which the paper shreds 92 are formed is at least 1.34 times greater than the coefficient of static friction between two layers of the paper from which the scraps of paper 92 are formed.
  • a flat surface was used for the test measurements, which was checked with a spirit level.
  • test measurements (a) the base was covered with a layer of the paper from which the paper shreds 92 are formed, in test measurements (b) with a polypropylene film, in test measurements (c) with a layer of cardboard and in test measurements (d) in each case covered with one of the creped individual layers 91, here with high crepe.
  • a flat surface of a measuring body was covered with a layer of the paper from which the paper scraps 92 are formed.
  • the dimensions of the measuring body made of beech wood are 10 cm x 10 cm x 1.8 cm.
  • the creped pulp was made in the following manner: Recycled cellulose wadding made from selected waste paper qualities according to DIN EN 643 was used as the basic material.
  • the recycled cellulose wadding was creped on a Yankee cylinder using a ceramic-coated steel scraper.
  • the adhesion of the cellulose fibers to the cylinder surface, the geometry of the scraper and the angle of attack of the scraper and the take-off angle of the creped cellulose wadding web are specially adjusted.
  • the elongation or the crepe factor is produced accordingly by the difference in speed between the Yankee cylinder and the reel.
  • the individual layers 91 are doubled, for example, to form a plurality of stacks each containing 4 individual layers 91 . This is preferably done on a laying machine.
  • the individual layers 91 typically lie on top of one another in the same layer production direction. However, since the creping is never exactly on top of one another, the stacking of the individual layers 91 on top of one another results in a correspondingly high stack height and at the same time a high stack volume. In principle, however, it is also conceivable to place the individual layers on top of one another with alternating alignment, so that the creping from individual layer 91 to individual layer 91 or the respective creping of the individual layers 91 crosses.
  • shreds of paper 92 are scattered on one of the stacks of individual layers 91 and another stack of individual layers 91 is placed on this layer of shreds of paper.
  • This process can be repeated several times, so that the result is a stack of the creped individual layers 91 with at least one layer of paper shreds 92 arranged between two of the individual layers 91′.
  • the creped individual layers 91' lying on both sides of the layer of paper shreds 92 which can have the same crepe but also a different crepe than the other individual layers 91, have a crepe height d ⁇ 1 mm, preferably ⁇ 0.6 mm, in certain cases of ⁇ 0.4 mm.
  • the stack created in this way can then be cut to the desired width, depending on the size of the back cushion 2 and the front cushion 3 .
  • the bag 8 consists of a polypropylene spunbonded nonwoven, with which the stack of the individual layers 91 and the paper snippets 92 is encased in the manner of a tube.
  • the polypropylene spunbonded fabric ensures that the individual layers 91, 91' and the paper shreds 92 are held together.
  • the proportion of the bag 8 in the total weight of the thermal container 1 is at most 4% by weight.
  • thermal container 1 can be counted in full against the quota for paper in accordance with Section 16 (3) VerpackG. This results in cost savings during disposal.
  • the attachment of the bag 8 to the creped fibrous material 9 on the outside of the stack can, as in figure 1 shown schematically, by means of spaced lines 13 of hot melt adhesive.
  • these lines are spaced about 20 mm apart and run along the web of material from which the back cushion 2 and the front cushion 3 are formed.
  • this web of material has areas filled with the fibrous material 9 and adjoining pure fleece areas.
  • a non-woven area, which adjoins a back cushion section of the material band, can then be used as a closure flap for closing the thermal container 1 .
  • a fleece overhang over the areas filled with the fibrous material 9 can be approx. 50 mm.
  • the web is severed transversely to the direction in which it runs.
  • figure 4 shows schematically another embodiment of a thermal container 1 'according to the invention in a perspective side view.
  • the thermal container 1' has an outer paper bag 11 and an inner paper bag 12 located in the outer paper bag 11. Fibrous material 9, which is constructed as described above, is introduced between the inner paper bag 12 and the outer paper bag 11 on at least two opposite sides of the thermal container 1'.
  • the inner paper bag 12 and the outer paper bag 11 are bonded to each other enclosing the pulp material 9 .
  • Carrying handles 14 are provided on an upper side of the thermal container 1'.
  • suitable closure means can be provided on the insulated container 1'.
  • the thermal container 1 ′ can have a block base 19 , but it can also be designed without the block base 19 .
  • hemp shreds can be used instead of the paper shreds 92 or in addition to the paper shreds 92 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
EP22182890.8A 2021-08-11 2022-07-04 Récipient thermique Active EP4134329B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021120900.5A DE102021120900B4 (de) 2021-08-11 2021-08-11 Thermobehältnis

Publications (3)

Publication Number Publication Date
EP4134329A1 true EP4134329A1 (fr) 2023-02-15
EP4134329C0 EP4134329C0 (fr) 2023-09-27
EP4134329B1 EP4134329B1 (fr) 2023-09-27

Family

ID=82557961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22182890.8A Active EP4134329B1 (fr) 2021-08-11 2022-07-04 Récipient thermique

Country Status (3)

Country Link
EP (1) EP4134329B1 (fr)
CA (1) CA3169570A1 (fr)
DE (1) DE102021120900B4 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050118366A1 (en) * 2003-06-25 2005-06-02 Piemonte Robert B. Barrier materials and containers made therefrom
WO2019113453A1 (fr) * 2017-12-08 2019-06-13 Ranpak Corp. Emballage isolé et procédé
DE202019003407U1 (de) 2019-08-19 2019-11-25 THlMM Verpackung GmbH + Co. KG Verpackung zur Aufnahme und/oder zum Transport temperaturempfindlicher Erzeugnisse und Zuschnittsatz dafür
WO2020072527A1 (fr) * 2018-10-01 2020-04-09 Field Andrew Howard Produits de papier isolant repulpables et leurs procédés de fabrication et d'utilisation
EP3772472A1 (fr) 2019-08-07 2021-02-10 Profümed Karlheinz Lohr e. K. Récipient thermique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020263149A1 (fr) 2019-06-24 2020-12-30 Ifoodbag Ab Sac

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050118366A1 (en) * 2003-06-25 2005-06-02 Piemonte Robert B. Barrier materials and containers made therefrom
WO2019113453A1 (fr) * 2017-12-08 2019-06-13 Ranpak Corp. Emballage isolé et procédé
WO2020072527A1 (fr) * 2018-10-01 2020-04-09 Field Andrew Howard Produits de papier isolant repulpables et leurs procédés de fabrication et d'utilisation
EP3772472A1 (fr) 2019-08-07 2021-02-10 Profümed Karlheinz Lohr e. K. Récipient thermique
DE202019003407U1 (de) 2019-08-19 2019-11-25 THlMM Verpackung GmbH + Co. KG Verpackung zur Aufnahme und/oder zum Transport temperaturempfindlicher Erzeugnisse und Zuschnittsatz dafür

Also Published As

Publication number Publication date
CA3169570A1 (fr) 2023-02-11
EP4134329C0 (fr) 2023-09-27
EP4134329B1 (fr) 2023-09-27
DE102021120900B4 (de) 2024-01-25
DE102021120900A1 (de) 2023-02-16

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