• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Heated container. The container comprises a hollow body (1) made of injected plastic material and a heated foil (5); where the hollow body (1) is formed by a bottom (1a) and some side walls (1b); and where the heated sheet (5) comprises a flexible resistor (3), a connector (6) coupled to the flexible resistor (3) and a laminar body (4) on which the flexible resistor (3) is printed. At least a part of the connector (6) and the rest of the heatable sheet (5) are embedded in the bottom (1a) of the hollow body (1); where the connector (6) is adapted to a USB connection of a device with a battery as a means of supplying electrical energy to the flexible resistance (3) to heat the heatable container: and where the whole of the heatable foil (3) is integrated into the heatable container during the injection process of the hollow body (1) made of plastic material. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2826248A1
    申请号:ES201930998
    申请日:2019-11-15
    公开日:2021-05-17
    发明作者:Lafuente Joaquín Castan；Fernandez Carolina Losada；Abarca Vicente Ruedas；Belmar Susana Otero
    申请人:Asociacion De Investigacion De Mat Plasticos Y Conexas；
    IPC主号:
    专利说明:

    [0003] Object of the invention
    [0004] The present invention refers to a heated container that allows heating a food previously introduced into an interior space of the container, so that the container integrates a heated foil embedded in a bottom of the container with means to be able to connect to a mobile device with a USB connection, being able to reach a temperature close to 100 ° C. The heated foil in combination with the rest of the structure of the container of the invention provides rapid and effective heating of the food introduced into the container. This heating solution integrated into the body of the food container, avoids any intermediate element and allows the food to be heated directly, reaching the desired temperature in a very short time and in a uniform way. In addition, in this way it is possible to work at relatively lower temperatures with a lower energy consumption requirement. The packaging of the invention falls within the food packaging sector.
    [0006] Technical problem to be solved and background of the invention
    [0007] The concern to find a solution that allows to heat the prepared food is not something new; We found the first patents from 1958, "Lunch box with heating unit", by Richard M Jones and Jr Dollin L Robinson; and over time they have been sophisticated in their development, reducing the size and facilitating their connection based on the different power sources available at the moment The heating systems used allow the heating of food prepared outside the home, mainly in offices and work areas.
    [0009] At present we can find solutions on the market for heating food integrated in lunch boxes and food carrier bags, in which food containers must be inserted, such as the USB LunchBox Warmer solutions marketed for € 46, where the Heated system is integrated into the structure of the food carrier bag; or lunch boxes containing other containers heated to 24 V with the vehicle's cigarette lighter such as the Oxoun lunch box that operates at 110 V and costs US $ 24.99.
    [0010] In said bags and lunch boxes, a thermal resistance is placed inside an aluminum lining located on the lid or at the base of the bags and lunch boxes; where the thermal resistance is connected, through a USB port, to an adapter or to a laptop to heat the food. This described system has the drawback that it can carry the risk of burns when handling and its price ranges between $ 24 and $ 39. Another drawback is that since the food is inside a container and is inside the bag or lunch box, the heat provided by the heating system takes longer to reach the food.
    [0012] Recently, the Swiss company Faitron, has developed and patented two solutions: the HeatsBox product to heat the food collected in a food container and the BabyBoo solution, to warm bottles anywhere. The solution developed by Faitron uses a heating element that consists of a metallic heating film that is embedded between two layers of silicone to achieve electrical insulation. However, Kapton heating films, polyester heating films or contact heating elements can also be used. The power supply can be from 5V to 240V, including the usual tolerances.
    [0014] The NESTEC firm has a patented disposable heated cup based on the incorporation of a resistance printed on a PET or PEC sheet, which is adhered to the plastic or cardboard cup to heat and / or prepare meals that require hot water such as dehydrated food or hot drinks.
    [0016] All the developments referred to above, even the most recent, such as the developments described in the patents with publication numbers WO 2018011663 A1 (D01) and US 2017/0137205 A1 (D02), integrate heating elements (mainly rigid resistors) in the inside a food transport bag and not in the container or compartment to be heated that is inserted inside the bag; where usually inside said bag other foods that do not require heat are carried; and where the food to be heated is located inside the bag. In addition, since the bag is an external element, it requires raising the temperature more and for a longer time so that the heat reaches the container container of the food to be heated, which makes it a substantially less efficient development at the level of energy consumption and time required. to get to heat and can also generate burns when having than to use higher temperatures.
    [0018] Patent with publication number US 20180213604 A1 (D03) refers to a disposable heated cup that is intended to heat a food product such as soups, hot beverages such as coffee or tea and dehydrated food preparation that requires the addition of water for its preparation and consumption; wherein the heating cup is essentially characterized in its first independent claim 1 in that it comprises an electrical heating circuit printed on an adhesive label and a printed USB connector that is connected to said electrical heating circuit.
    [0020] The patent (D03) refers to the incorporation of a heated resistance on the outside (perimeter and base) as an additional element and adhered to the disposable paper and / or plastic single-use cup to prepare and / or heat soups, food dehydrates or drinks such as coffee and herbal teas.
    [0022] The heated cup is also characterized in that it includes an adhesive laminar body on which the heating circuit is printed; where in a first embodiment the laminar body is attached to an outer side wall of the bowl; in a second embodiment, it is adhered to the outer area of the base or bottom of the cup; and in a third embodiment said laminar body is internally attached to a heat shrinkable label that surrounds the heated cup.
    [0024] In another embodiment of the patent (D03), the electrical heating circuit is printed directly on a surface of the heated cup.
    [0026] In another embodiment of the D03 patent, the electrical heating circuit and the USB connector are printed with an electrically conductive material selected from a conductive copper ink, polymer, and carbon-based resistive ink.
    [0028] The aforementioned patent with publication number WO 2018011663 A1 (D01) refers to a food box or lunch box for storing, transporting and heating food, particularly food prepared for consumption, so that the object of this patent is that the box can prevent injury to the user, particularly burns, when opening and using the food box.
    [0029] The patent also cited above with publication number 2017/0137205 A1 (D02), refers to a lunch box for storing, transporting and heating food, and more particularly food prepared for consumption.
    [0031] Patent Publication No. EP 3177106 A1 (D04) relates to a disposable, resistive, solid, extra-low voltage heater for use in a food container that can be heated; characterized in that it comprises: an at least partially flexible heating element, a housing and a mechanism adapted to compact the heating portion substantially in the housing.
    [0033] The utility model with publication number CN 202536380 U (D05) refers to a self-heating picnic food box that has the advantages of simple structure and ease of use. The box includes a heating device disposed within a hollow cavity in the lid of the box.
    [0035] Description of the invention
    [0036] In order to achieve the objectives and avoid the drawbacks mentioned in the previous sections, essentially taking into account the drawbacks presented by the closest document D03 (US 20180213604 A1), the invention proposes a heatable container comprising a hollow plastic material body injected and a heatable foil that includes a first surface and a second surface opposite the first surface; where the hollow body is formed by a bottom and some side walls; and where the heatable sheet comprises a flexible resistor, a connector coupled to the flexible resistor and a laminar body on which the flexible resistor is printed.
    [0038] At least a part of the connector and the rest of the heatable foil are embedded in the bottom of the hollow body made of injected plastic material according to a first embodiment of the invention; wherein the connector is adapted to a USB connection of a battery-powered device as a means of supplying electrical energy to the flexible resistor to heat the heatable package; and where the whole of the heatable sheet is integrated into the heatable container during the injection process of the hollow body of plastic material.
    [0040] The flexible resistance is printed on a laminar body of a selected material between PET and PC.
    [0042] The flexible resistance is adapted to the size and volume of the heated container with the capacity to reach a temperature between 30 ° C and 98 ° C.
    [0044] In a second embodiment of the invention, the heatable container integrates a refractory coating applied on the first surface of the heatable sheet that includes the printed resistance; where said refractory coating is located above the flexible resistance printed on the laminar body; wherein said refractory lining is configured to achieve a uniform heat distribution over the entire surface of the heatable sheet provided by the flexible resistance; and where the assembly formed by the heatable sheet and the refractory coating is embedded in the thermoplastic material of the hollow body.
    [0046] In a third embodiment of the invention, the heatable container integrates a thermal insulating coating applied under the second surface of the heatable sheet that includes the printed resistance; wherein said thermal insulating coating is located below the heatable sheet and below the flexible resistance; wherein said thermal insulating coating is configured to prevent heat losses to the outside of the heatable container through its bottom; and where the assembly formed by the heatable sheet and the thermal insulating coating is embedded in the thermoplastic material of the hollow body.
    [0048] In a fourth embodiment of the invention, the heatable container integrates the refractory coating applied on the first surface of the heatable sheet, and the thermal insulating coating applied under the second surface of the heatable sheet; where the complete assembly formed by the heatable sheet, the refractory lining and the thermal insulating lining is embedded in the thermoplastic material of the hollow body.
    [0050] The material of the hollow body is made of a material selected from polyolefins such as PP or PE, a material such as PET, PC, PS, TPU or ABS and a material selected from biopolymers such as PLA. It is emphasized that these materials are compatible with the materials with which the heating foil is made.
    [0051] Unlike existing solutions in the state of the art, the present invention integrates the heated solution into the body of the food tray or container, which avoids any intermediate element and allows the food to be directly heated, reaching the desired temperature in less time. and evenly. In this way, it is possible to work at lower temperatures with respect to current solutions and therefore requires less energy consumption.
    [0053] On the other hand, the integrated solution provides greater flexibility in its use, it is more robust since the resistance is integrated into the body of the container, achieving greater protection and sealing thereof; In addition, it is more efficient at the level of production processes and more economical, since it can be produced with scale processing techniques such as printing and plastic injection and does not require component assembly. It uses the use of external batteries via USB as a power source, and allows more than one use of the container.
    [0055] The design of the resistance can be customized and adapted to the requirements of the size and volume of the final container, in order to optimize the distribution of the heat required for each type of container.
    [0057] The technology developed in the present invention is primarily used and applied in the food packaging sector. The USB-HEATFOOD project focuses on companies that manufacture rigid single-use or more than one-use packaging, also encompassing product companies, secondly in household items for the development of heated lunch boxes, or even in third place in childcare for baby bottles and thermos for baby food.
    [0059] It is important to highlight the interest that the present invention also represents for the food industry and, specifically, processed and / or precooked foods, since it allows to further facilitate the consumption of its products anywhere, so that the end user does not it will take more than a mobile device to heat your food.
    [0061] The present invention focuses on the development of a self-heating food container via USB 3.0 connection to any portable device (external batteries, smartphones, tablets, laptops, etc.) for the use of mobile devices using them as a source of energy to heat the food in anywhere and anytime. In this way, the heating of prepared / processed food is facilitated in areas / spaces that are not conditioned for it.
    [0063] The present invention is based on "Plastronics" technology for the development and integration of a flexible resistance in the mold for the development of a heatable container. Plastronics is a new line of research and development in the field of electronics that encompasses the integration of electronic components in plastic materials and the development of flexible electronics, or uses conductive materials based on polymers from organic and hybrid materials.
    [0065] The present invention focuses on the development of a flexible resistance printed by printing technologies such as gravure, flexography, screen printing, offset and inkjet; that can be powered with 5V via USB connection to portable electronic devices (external batteries, smartphones, tablets, laptops, etc.), for the use of mobile devices using them as a source of energy to heat food anywhere and anytime moment efficiently; as well as its integration in thermoplastic packaging during the injection process through In Mold Electronics.
    [0067] According to the Joule effect, a conductor through which a current flows releases part of the kinetic energy of electrons in the form of heat due to their resistance. Thus, for a given resistance, the greater the current, the greater the observed effect.
    [0069] The operation of the heating device has been based on Ohm's Law and the power law. Equation 1 and 2 respectively:
    [0071] Equation 1:
    [0073] Equation 2
    [0076] Being: P power in watts, V the electrical voltage in volts, I the current in amperes, R resistance in Ohms.
    [0077] The developed flexible printed resistor is heated by connecting to a USB port. USB 3.0 devices can deliver a current ranging from 900 milliamps to 2 amps, based on the power device connected. Thus, if the aforementioned equations are applied to 900 mA and 5V, the following would be obtained:
    [0079] P = 0.9 * 5 = 4.5 watts.
    [0083] In order to maintain the maximum power and according to Ohm's law, the resistance of the device must be:
    [0087] Taking into account the calculations carried out for the design of a resistor powered via USB 3.0 port, the following aspects have been taken into account for the optimization of the resistance printed with conductive materials: resistance of the inks selected for the printing of conductive tracks and the resistances, track width and track thickness, number, size and thickness of resistances per surface area to be heated, thickness of the substrates, flexibility of the substrates, degradation temperatures of the inks.
    [0089] IME molding technology has been used for the integration of the printed flexible resistance (heater flexible) and for this, two phases have been followed. A first phase where it will be integrated into pieces of simple geometry, mainly flat pieces and a second phase where it will be integrated into trays and different types of plastic containers: polyolefins such as PP, PS or PE, more technical materials such as PET, PC, TPU or ABS and even biopolymers like PLA.
    [0091] The placement of the flexible resistance printed in the mold has been simplified by being able to position it inside the mold cavity, being able to work with a vertical mold opening injector, instead of horizontal as are most conventional injectors. Once the flexible resistance printed inside the mold has been inserted, the optimal configuration of injection parameters has been studied, minimizing the pressures reached inside the mold, in order to maintain the functionality of said flexible printed resistor.
    [0093] The most effective zone corresponds to the central zone, made up of carbon resistances. In this case, the temperature increase reached is greater than 80 ° C after a connection of a time of 90 seconds.
    [0095] Below, to facilitate a better understanding of this specification and forming an integral part thereof, a series of figures is attached in which the object of the invention has been represented by way of illustration and not limitation.
    [0097] Brief description of the figures
    [0098] Figure 1.- Shows a plan view of the heatable container, object of the invention. Figure 2.- Shows a sectioned elevation view of the container according to section AA of figure 1.
    [0099] Figure 3.- Shows an elevation view of the container of the invention.
    [0100] Figure 4.- Shows a sectional view according to section BB of figure 3.
    [0101] Figure 5.- Shows a sectional view according to section CC of figure 3.
    [0102] Figure 6.- Shows a view of a graph that relates times and temperatures.
    [0104] Description of an embodiment of the invention
    [0105] Considering the numbering adopted in the figures, the heated container comprises a hollow body 1 made of plastic material formed by a bottom 1a and side walls 1b that include edges that configure a perimeter contour that delimits an opening 2 through which it can be inserted into the internal space of the container a food to be able to heat it or keep it warm by means of a printed flexible resistance 3 located on the bottom 1a of the hollow body 1.
    [0107] Said flexible printed resistance 3 is integrated, by means of screen printing, on a laminar body 4 made of PET; where the assembly of the laminar body 4 and the flexible resistance 3 make up a heatable sheet 5 that is integrated and embedded in turn in the bottom 1a of the hollow body 1 of the container in a first embodiment of the invention. Said heated sheet 5 further includes a connector 6 to be able to plug in a power source of the flexible resistor 3, wherein said power source is a mobile device, and even simply an external device with a battery; where in all cases the devices have a USB connection.
    [0108] In a second embodiment of the invention, the heatable container integrates a refractory coating 7 applied on a first surface of the heatable foil 5 that includes the printed resistor 3; wherein said first surface can be identified as the obverse of the heatable sheet 5. Thus, said refractory coating 7 is located above the flexible resistance 3 printed on the laminar body 4; wherein said refractory coating 5 is configured to achieve a uniform heat distribution over the entire surface of the heatable sheet 5 provided by the flexible resistance 3. In this second embodiment of the invention, the assembly formed by the heatable sheet 5 and the refractory lining 7 is embedded in the thermoplastic material of the hollow body 1.
    [0110] In a third embodiment of the invention, the heatable container 5 integrates a thermal insulating coating 8 applied under a second surface of the heatable foil 5 that includes the printed resistor 3; where said second surface can be identified as the reverse side of the heated sheet 5. Thus, said thermal insulating coating 8 is located below the heated sheet 5 and below the flexible resistance 3 that forms part of the heated sheet 5; where said thermal insulating coating 8 is configured to avoid heat losses to the outside of the heatable container through its bottom 1a. In this third embodiment of the invention, the assembly formed by the heated sheet 5 and the thermal insulating coating 8 is embedded in the thermoplastic material of the hollow body 1.
    [0112] In a fourth embodiment of the invention, at the bottom 1a of the hollow body 1 the complete assembly formed by the heated sheet 5, the refractory lining 7 and the thermal insulating lining 8 is included; where said complete set is also embedded in the thermoplastic material of the hollow body 1. Thus, in this case the refractory coating 7 is applied on the first surface or obverse of the heated sheet 5, while the thermal insulating coating 8 is applied on the second surface or reverse of the heated sheet 5; where the front and back are opposite faces of the heated sheet 5.
    [0114] In a particular embodiment of the invention, the flexible resistance 3 has dimensions of 90 mm. x 90 mm; where the assembly of the laminar body 4 of PET and the flexible resistance 3 is integrated into the hollow body 1 thermoplastic of PC. Said flexible resistance 3 has managed to reach a temperature of 90 ° C after connection to a 7000 mAh power bank via USB 3.0 port for 80 seconds.
    [0116] The connector 6 attached to the heated sheet 5, is inserted into a removable insert outside the mold, to later be able to be positioned inside the mold cavity. In this way, the heated sheet 5 attached to the connector 6 is inserted in a determined position to ensure its correct positioning in the mold. Subsequently, the sheet 5 attached to the connector 6 is over-injected with a thermoplastic material (PC) to form the part that constitutes the mold cavity that is made up of the hollow body 1; where, in this thermoplastic material injection operation, the heated sheet 5 (first embodiment) is embedded in the bottom 1a of the hollow body 1. The dimensions of the injected hollow body 1 in which the flexible resistance 3 has been integrated together with the laminar body 4 that supports it, are 149 mm. x 149 mm. x 57.4 mm. and with a capacity of 843,249 mm3. The injection of the thermoplastic material and the placement of the entire heating sheet 5 has been carried out in a vertical injector with 100 tons of closing force.
    [0118] The most effective zone corresponds to the central zone of the bottom 1b of the container, made up of the flexible resistance 3 of carbon material. In this case, the temperature increase reached is greater than 80 ° C after a connection of 90 seconds.
    [0120] A particular example of the invention is a lunch box or food container container for more than one use that can be heated via USB 3.0, with the flexible resistance 3 integrated into the thermoplastic material, preventing the flexible resistance 3 from being an additional element or attached to the container.
    [0122] Figure 6 shows an analysis of the times necessary to heat the hollow body 1 of the container to different temperatures through a USB port with an external battery.
    权利要求:
    Claims (7)
    [1]
    1. - Heated container , comprising a hollow body (1) of injected plastic material and a heated sheet (5) that includes a first surface and a second surface opposite the first surface; where the hollow body (1) is formed by a bottom (1a) and some side walls (1b); and where the heated sheet (5) comprises a flexible resistor (3), a connector (6) coupled to the flexible resistor (3) and a laminar body (4) on which the flexible resistor (3) is printed; characterized in that at least a part of the connector (6) and the rest of the heatable sheet (5) are embedded in the bottom (1a) of the hollow body (1) made of injected plastic material; wherein the connector (6) is adapted to a USB connection of a battery-powered device as a means of supplying electrical energy to the flexible resistor (3) to heat the heatable container; and where the whole of the heatable sheet (3) is integrated into the heatable container during the injection process of the hollow body (1) of plastic material.
    [2]
    2. - Heated container , according to claim 1, characterized by the flexible resistance (3) is printed on a laminar body (4) of a material selected from a polyethylene terephlalate material (PET) and a polycarbonate material (PC) .
    [3]
    3. - Heated container according to any one of the preceding claims, characterized in that the flexible resistance (3) is adapted to the size and volume of the heated container capable of reaching a temperature between 30 ° C and 98 ° C.
    [4]
    4. - Heated packaging according to any one of the preceding claims, characterized in that it integrates a refractory coating (7) applied on the first surface of the heated sheet (5) that includes the printed resistance (3); wherein said refractory coating (7) is located above the flexible resistance (3) printed on the laminar body (4); wherein said refractory coating (7) is configured to achieve a uniform heat distribution over the entire surface of the heatable sheet (5) provided by the flexible resistance (3); and where the assembly formed by the heatable sheet (5) and the refractory coating (7) is embedded in the thermoplastic material of the hollow body (1).
    [5]
    5. - Heated container , according to any one of the preceding claims 1 to 3, characterized in that it integrates a thermal insulating coating (8) applied under the second surface of the heatable sheet (5) including the printed resistor (3); wherein said thermal insulating coating (8) is located below the heatable sheet (5) and below the flexible resistance 3; wherein said thermal insulating coating 8 is configured to avoid heat losses to the outside of the heatable container through its bottom (1a); and where the assembly formed by the heatable sheet (5) and the thermal insulating coating (8) is embedded in the thermoplastic material of the hollow body (1).
    [6]
    6. - Heated container , according to previous claims 4 and 5, characterized in that it integrates the refractory coating (7) applied on the first surface of the heatable sheet (5), and the thermal insulating coating (8) applied under the second surface of the heated sheet (5); where the complete set formed by the heatable sheet (5), the refractory lining (7) and the thermal insulating lining (8) is embedded in the thermoplastic material of the hollow body (1).
    [7]
    7. - Heated container according to any one of the preceding claims, characterized in that the material of the hollow body (1) is made of a material selected from polyolefins such as PP or PE, a material such as PET, PC, PS, TPU or ABS and a material selected from biopolymers such as PLA.
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    同族专利:
    公开号 | 公开日
    ES2826248B2|2021-10-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20170137205A1|2014-05-21|2017-05-18|Faitron Ag|Lunchbox|
    US20180213604A1|2015-07-16|2018-07-26|Nestec S.A.|Disposable cup for heating food products|
    CN205180629U|2015-12-05|2016-04-27|宁波银瑞有机硅科技发展有限公司|Electrically heating lunch -box|
    KR20180028574A|2016-09-08|2018-03-19| 파루|Plane heater for delivery bag and the control method thereof|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201930998A|ES2826248B2|2019-11-15|2019-11-15|HEATABLE CONTAINER|ES201930998A| ES2826248B2|2019-11-15|2019-11-15|HEATABLE CONTAINER|
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