TW201728225A - Laminated heating sheet for IH cooking device - Google Patents

Abstract

In a laminated heating sheet of the present invention which is used for IH cooking devices, an electrically conducting sheet 3 is laminated on one surface of a resin sheet 5, and a reinforcing dielectric piece 7 which is stronger than the resin sheet 5 is stuck to the other surface of the resin sheet 5 in a manner that the surface of the resin sheet 5 is at least partly exposed.

Description

Laminated heating sheet for induction heating cooker

The present invention relates to a laminated heat generating sheet for an IH cooker which is heated and cooked by an IH (Induction Heating) cooker.

In recent years, a heating cooker called an electromagnetic cooker has been widely used in place of a gas stove or the like. The electromagnetic cooker is also called an IH cooker, and generates a high-frequency magnetic field by an electromagnetic induction heating coil provided inside, and induces an eddy current to the cooking container placed on the cooker, and the eddy current is generated by the eddy current. The Joule heat heats the foodstuff contained in the cooking container, or the object to be heated, such as water. Since such an electromagnetic cooker can be heated and cooked without using a fire, it is highly safe; further, it is easy to wipe off dirt, and it is excellent in cleanliness; further, it is superior in economical efficiency to a conventional heating cooker.

However, the electromagnetic cooker has a limited number of cooking utensils that can be used based on the principle, and it is necessary to use a special tool composed of a magnetic material typified by iron. Therefore, many cooking utensils or cooking containers made of materials other than magnetic materials have recently been proposed and put into practical use. For example, Patent Document 1 discloses a heating cooker for an IH cooker, in which a heat-generating sheet made of a metal foil such as aluminum foil is attached to a plastic container, and a laminate is proposed for the heat-generating sheet. The heat generating sheet has a structure in which a metal foil such as an aluminum foil is laminated with a thermoplastic resin layer such as an olefin resin.

If the heat generating sheet is placed only on the bottom of the plastic container, it is not fixed, and when the cooking (cooking) is heated, the heat generating sheet is inconvenient to move, and the heat generating sheet is fixed to the bottom of the inside of the plastic container by heat sealing. Therefore, the thermoplastic resin layer laminated on the metal foil needs to be heat-sealed to the bottom of the plastic container.

The aforementioned heat-generating sheet is not suitable for disposable use because it needs to be adhered to the bottom of the container. Moreover, since it is necessary to adhere to the manufacturing step of being fixed to the bottom of the plastic container, there is a problem that it is difficult to manufacture at low cost.

The inventors of the present invention have further developed the function of the heat generating sheet, and previously proposed a heat generating sheet for an IH cooker comprising a conductive sheet (metal foil) and a laminated sheet of a dielectric layer formed of an olefin resin or the like. Patented (Patent Document 2). The heat-generating sheet can be folded into a container shape, and a container (heat-generating container) formed by folding the heat-generating sheet is inserted into a holder of a thermoplastic resin made of a container shape, and water and cooked foodstuff are added to the inside of the heat-generating container. In this state, the cooking is performed by the IH cooker.

The heat-generating sheet is not a holder made of a thermoplastic resin fixed to a container shape by heat sealing, and has an advantage suitable for disposable applications, and it is expected to improve the shape retainability of the container formed by the sheet folding. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2014-239852 [Patent Document 2] Japanese Patent No. 5788557

[Problems to be Solved by the Invention] Therefore, an object of the present invention is to provide a laminated heat-generating sheet for use in an IH cooker, which can be folded to form a container which does not collapse in shape even when a food material or the like is added. [Means for solving the problem]

According to the present invention, there is provided a laminated heat generating sheet for an IH cooker, characterized in that a conductive sheet is laminated on one surface of a resin sheet, and another surface of the resin sheet is exposed, and the resin sheet is additionally A reinforcing dielectric sheet having a higher strength than the resin sheet is attached to one side.

In the laminated heat-generating sheet of the present invention, it is preferable that: (1) the reinforcing dielectric sheet-based paper sheet, (2) the resin sheet-based polyoxyethylene rubber sheet, and (3) the reinforcing dielectric material The sheet has a configuration in which an annular base portion and a plurality of protrusions radially extending from the outer side of the annular base portion and spaced apart from each other, (4) the tab forms an odd number, and (5) the tab One portion is connected to the annular base portion, and (6) the conductive sheet is provided with an eddy current control slit line penetrating the conductive sheet in the thickness direction. [Effects of the Invention]

In the laminated heat-generating sheet of the present invention, the resin sheet-based dielectric layer laminated on one surface of the conductive sheet is formed to prevent direct contact between the conductive sheet and the IH cooker and to cause heat generation of the conductive sheet of the IH cooker. In the present invention, a reinforcing dielectric sheet having a higher strength than the resin sheet is attached to the other surface of the resin sheet (the surface opposite to the conductive sheet). Therefore, the dielectric sheet for reinforcing the laminated heat generating sheet is formed on the outer surface side and folded into a shape of a container, and the formed container is placed on a holder placed on the IH cooker, even if it is added to the container. The foodstuff can also effectively prevent the shape of the container from collapsing, and can be stably cooked by the IH cooker.

Moreover, the above-mentioned reinforcing dielectric sheet is not provided so as to cover the entire surface of the resin sheet, but is attached so that one surface of the resin sheet is exposed. Therefore, the laminated heat generating sheet can be effectively folded into a container shape. Further, the reinforcing dielectric sheet does not hinder the heat generation of the conductive sheet by the IH cooker or the stop of heat generation by the sensor when excessive heat generation occurs.

As shown in Figs. 1 to 3, the laminated heat-generating sheet of the present invention (indicated by 1 in total) is laminated on one surface of the resin sheet 5 on the other side of the resin sheet 5, and is opposite to the conductive sheet 3. The side surface of the side is attached with a dielectric sheet 7 for reinforcement. As shown in FIG. 6 to be described later, the laminated heat-generating sheet 1 is in a state in which the reinforcing dielectric sheet 7 is formed on the outer surface side and is folded into the container A, and is placed on the holding member 30 of the dielectric system. Placed in the induction heating section of the IH cooker.

The conductive sheet 3 of the laminated heat-generating sheet 1 is formed of a metal foil typified by aluminum foil or the like, and the laminated heat-generating sheet 1 is placed in the induction heating portion of the IH cooker so that the resin sheet 5 is on the lower side, so that IH is cooked. When the device is activated, the eddy current induced by the high-frequency magnetic field can cause the conductive sheet 3 to generate heat.

Further, the resin sheet 5 of the laminated heat-generating sheet 1 is a dielectric body, and is formed in order to prevent the conductive sheet 3 from coming into direct contact with the IH cooker and to cause the heat generation of the conductive sheet 3 to be moderate. The resin sheet 5 is not particularly limited as long as it is a resin which is not energized, and is generally formed of the following resin from the viewpoints of moldability, cost, and lightness.

The resin of the resin sheet 5 may, for example, be a rubbery polyoxyethylene rubber in a polyoxyxylene resin; low density polyethylene, high density polyethylene, polypropylene, poly-1-butene, poly 4-methyl-1- A copolymer of pentene or an α-olefin, an olefin resin such as a cyclic olefin copolymer, or an ethylene/vinyl copolymer such as an ethylene/vinyl acetate copolymer, an ethylene/vinyl alcohol copolymer, or an ethylene/vinyl chloride copolymer. Resin; styrene resin such as polystyrene, acrylonitrile, styrene copolymer, ABS, α-methylstyrene, styrene copolymer; polyvinyl chloride, polyvinylidene chloride, vinyl chloride, vinylidene chloride Vinyl resin such as copolymer, polymethyl acrylate or polymethyl methacrylate; phthalamide resin such as nylon 6, nylon 6-6, nylon 6-10, nylon 11, nylon 12; polyethylene terephthalate Polyester resin such as ester (PET), polybutylene terephthalate or polyethylene naphthalate (PEN); polycarbonate resin; polyphenylene ether; polyimine resin; polyamidoximine Resin; polyether oxime imide resin; fluororesin; allyl resin; polyurethane resin; fiber a resin, a polyether oxime resin, a ketone resin, an amine resin, etc., and further, may be a blend of the resins, which are modified by appropriate copolymerization, or may have a multilayer structure. . In the present invention, in particular, a polyester resin such as polyoxyxene rubber, PET or PEN, an olefin resin such as polypropylene, a polycarbonate resin or a polyimide resin is preferable, and in particular, a viewpoint of excellent heat resistance is considered. The rubbery polyoxygenated oxygen in the oxygen resin is most preferable. Further, when a high-viscosity, high-temperature-heated edible oil or the like is added to the inside of the heat-generating sheet container and cooked by an IH cooker, the resin sheet 5 is preferably a poly-xylene rubber sheet.

The resin sheet 5 differs depending on the size of the laminated heat-generating sheet 1 and the like, and generally has a thickness of about 5 to 80 μm.

Further, in order to adjust the eddy current induced by the induction heating by the operation of the IH cooker, the conductive sheets 3 of the laminated heat generating sheet 1 are formed with various types of slit lines X1, X2, and X3. That is, the slit lines are formed in a line shape so as to penetrate the conductive sheet 3 and leave the resin sheet 5, so that the eddy currents induced by the conductive sheet 3 are completely separated (refer to FIGS. 1 and 2). A well-known method such as laser processing is formed.

The laminated heat-generating sheet 1 is generally circular in shape as a whole, but it is also possible to form the container A of the following form: the side of the conductive sheet 3 is formed as an inner surface by folding, and the central circular area becomes the bottom portion 10, and the annular region around it becomes The peripheral side wall portion 13 (see FIG. 7 described later). That is, the size of the container A formed in this manner is substantially the same as that of the cooking pot used in the home.

The conductive sheet 3 which is a portion (annular region) of the peripheral side wall portion 13 of the container formed by the folding is formed with a plurality of first slit lines X1 at equal intervals, and the first slit line X becomes the bottom portion 10 (the center circle) The portion of the center of the shaped region extends radially from the starting point (see Fig. 2). By the first slit line X1, the eddy current of the conductive sheet 3 of the peripheral side wall portion 13 of the container formed by the collapse can be reduced or blocked, and excessive heat generation of the peripheral side wall portion 13 can be prevented. In addition, the heating and cooking (cooking) can be performed at a suitable temperature, and the dielectric member holding member 30 (see FIG. 6 described later) which is in contact with the peripheral side wall portion 13 can be effectively prevented from being damaged by heating.

Such a first slit line X1 may be appropriately selected in accordance with the size of the container formed by the folding, and the number of eddy currents induced by the high-frequency magnetic field during heating and cooking may be blocked. Generally, it is two or more, preferably three to 40. Further, in FIGS. 2 and 3, the first slit line X1 extends radially, but may be formed in a curved shape or other shape as long as the eddy current can be reduced or blocked.

Further, as shown in Fig. 2, in the region of the bottom portion 10 of the container formed in this manner, it is preferable to form a plurality of endless second slit lines X2 having a concentric shape centered on the bottom center O. That is, by the endless slit line X2, the eddy current flowing through the conductive sheet 3 of the bottom portion 10 of the container A formed by the collapse can be separated for each region, thereby preventing excessive heat generation of the bottom portion 10, It is effective to cook by heating such as cooking. The number of such endless second slit lines X2 is not particularly limited, and is usually preferably several. 2, the first slit line X1 extends to the position of the maximum diameter (maximum) slit line of the second slit line X2. Thereby, the eddy current induced in the bottom portion 10 can be prevented from being energized to the side wall portion 13, and excessive heat generation of the side wall portion 13 can be surely prevented.

Further, as shown in FIG. 2, in a region surrounded by the minimum diameter (minimum) slit line of the endless second slit line X2, a position extending to the minimum diameter slit line of the second slit line X2 is formed. The third incision line X3. That is, the third slit line X3 reduces or blocks the eddy current induced at the central portion of the bottom portion 10, and effectively prevents the boiling of the central portion of the bottom portion 10 during heating cooking (cooking). . Such a third slit line X3 may extend until the direction of the induced eddy current is reduced or blocked, that is, the position of the minimum diameter slit line extending to the endless second slit line X2, for example, in FIG. The pattern is formed in an arc shape, but may be formed into a linear shape so as to be a cross cut. Further, the number of the strips is not limited.

Further, in the example of Fig. 2, the first slit line X1 is in contact with the largest diameter slit line of the second slit line X2, and the largest diameter slit line of the second slit line X2 is formed in an endless shape, and the minimum slit line of the second slit line X2 is formed. It is in contact with the third slit line X3. On the other hand, the slit lines can be formed in such a manner as not to be in contact with each other, and such a pattern has an advantage in that damage of the resin sheet 5 which is generated when the slit line is formed can be surely prevented.

Specifically, referring to FIG. 4 showing another pattern of the slit line, in this example, the first slit line X1 does not extend to the position of the largest diameter slit line of the second slit line X2, and the end portion X1a of the first slit line X1 and the first portion 2 There is a gap α between the largest diameter cut lines of the slit line X2. Further, the maximum diameter slit line of the second slit line X2 is not completely endless, and the end portions X2a and X2a are formed in a circular arc shape, and a gap α exists between the end portions. Similarly, the third slit line X3 does not extend to the position of the smallest diameter slit line of the second slit line X2, and the gap α exists between the end portion X3a of the third slit line X3 and the minimum diameter slit line of the second slit line X2. That is, the slit lines X1 to X3 penetrating through the conductive sheet 3 are formed by laser irradiation (laser processing), but the portions where the slit lines are in contact with each other are repeatedly subjected to laser processing, and the object to be heated is heated. The heat generated by the conductive sheet (metal foil such as aluminum foil) causes the base resin sheet 5 in this portion to be broken, and it is easy to cause problems such as formation of openings. The same applies to the case where the slit line is completely circular (endless) as in the second slit line X2. This is because the laser processing is repeated at the end portion of the line where the laser processing is formed in order to completely become endless.

In the aspect of Fig. 4, the first to third slit lines X1 to X3 are not in contact with each other, and a certain gap α is formed between the first and third slit lines, and a gap α is also formed in the second slit line X2. Thereby, it is possible to prevent overheating caused by repeated laser processing, and it is possible to effectively prevent breakage of the resin sheet 5 due to laser processing.

When the gap α is increased, the above effects due to the slit lines X1 to X3 are lowered. Therefore, the gap α should be a moderate size, and is generally about 0.5 to 1.0 mm.

Further, it is preferable that the gap α in the maximum diameter slit line of the second slit line X2 is formed to have a short slit line Y for preventing leakage from the extension line of the slit line toward the outside. Thereby, it is possible to further suppress the decrease of the eddy current in the maximum diameter slit line (leakage to the outer circumference) or the decrease in the blocking effect. On the other hand, it is preferable that the gap α in the minimum diameter slit line of the second slit line X2 is formed from the extension line of the slit line toward the inner side to form a short slit line Y for preventing leakage. Thereby, the eddy current induced in the minimum diameter slit line can be reduced or blocked, and the sudden boiling due to local heating of the central portion can be more effectively prevented during heating cooking (cooking). Further, the length of the slit line Y for preventing leakage is preferably about 0.5 to 2.0 mm from the extension line of the slit line.

In the laminated heat-generating sheet 1 having the above-described basic structure, in the present invention, as shown in Fig. 1, a reinforcing dielectric sheet 7 is attached to the surface of the resin sheet 5 (the surface opposite to the conductive sheet 3). In other words, when the laminated heat-generating sheet 1 is formed by the two-layer structure of the conductive sheet 3 and the resin sheet 5, if the food material or the like is added to the container A formed by folding it, the shape of the container may be collapsed repeatedly. . For example, as shown in FIG. 7, the container A in which the laminated heat-generating sheet 1 is folded is placed in the holder 30, and when the foodstuff is added and heated by the IH cooker, the container may not be provided in accordance with the shape of the holder 30. A, or can not be set to a steady state, heating cooking becomes difficult. In the present invention, the dielectric sheet 7 for reinforcement is provided on the surface of the resin sheet 5, and the dielectric sheet 7 is formed so as to be folded on the outer surface side, whereby the container A having a stable shape can be formed. In other words, when the container A is formed by folding the wrinkles or the like, the reinforcing dielectric sheet 7 (a plurality of tabs 23 to be described later) can be present on the folded surfaces adjacent to each other, whereby the shape of the container A can be stably maintained. .

Therefore, according to the present invention, the container A formed by folding is placed in the holder 30, and when the food material is added and heated by the IH cooker, the container A can be set in accordance with the shape of the holder 30, or can be set to a stable state. It can be heated and cooked stably using the IH cooker.

The above-mentioned reinforcing dielectric sheet 7 is formed of a material that is not energized, similarly to the resin sheet 5, but has a strength greater than that of the resin sheet 5. When the reinforcing dielectric sheet 7 is formed of a material having a lower strength than the resin sheet 5, the reinforcing effect is insufficient, and the form retention of the container A formed by the folding is insufficient. Therefore, the dielectric sheet 7 for reinforcement is formed of a high-strength material that is not energized, and may be formed of a polyester resin such as PET or PEN depending on the material of the resin sheet 5, and generally, in consideration of low cost and the like, Paper is the most ideal.

Further, when the container A formed by folding the laminated heat generating sheet 1 is placed on the IH cooker, the reinforcing dielectric sheet 7 is placed between the conductive sheet 3 and the IH cooker. Therefore, the reinforcing dielectric sheet 7 does not hinder the heat generation of the conductive sheet 3 by the IH cooker (or the stop of heat generation due to overheating by the sensor), and does not hinder the collapse into a container shape. Therefore, the thickness of the dielectric sheet 7 for reinforcement is, for example, about 0.1 to 5 mm, and the entire surface of the resin sheet 5 cannot be covered, and a part thereof needs to be exposed.

For example, as shown in FIG. 3, the reinforcing dielectric sheet 7 is composed of an annular base portion 21 and a plurality of protruding pieces 23 radially extending on the outer side of the annular base portion 21, and is attached to the resin in such a manner. The back side of the sheet 5 (and the side of the conductive sheet 3 on the opposite side). The annular base portion 21 is a portion in which the bottom portion 10 of the container A is defined when the laminated heat generating sheet 1 is folded into a container A (see FIGS. 6 and 7), and a plurality of the protruding pieces 23 are located at a portion corresponding to the side wall portion 13 of the container A. The center O (corresponding to the center of the bottom portion 10) extends radially, but no protrusion is formed inside the annular base portion 21.

As can be understood from Fig. 3, in the region surrounded by the annular base portion 21, the surface of the resin sheet 5 is exposed, whereby when the container A is placed on the IH cooker, the operation of the IH cooker is used and the resin sheet 5 is interposed. The conductive sheet 3 generates heat, and when the bottom portion 10 of the container A during heating cooking is abnormally high temperature, the sensor provided in the IH cooker detects and stops the operation of the IH cooker.

Moreover, the plurality of protrusions 23 of the reinforcing dielectric sheet 7 located in the portion corresponding to the side wall portion 13 of the container A (that is, the outer side of the annular base portion 21) are provided at intervals. As a result, as shown in FIG. 6(b), when the container A is formed by folding the wrinkles or the like, the projections 23 are respectively present on the respective faces of the side wall portion 13 of the folded wrinkles, and the adjacent projections are formed. The sheets 23 are overlapped with each other, and the shape of the container A formed by the laminated heat generating sheet 1 can be stably maintained. Further, when the plurality of tabs 23 of the reinforcing dielectric sheet 7 are connected to each other, it is difficult to fold into the shape of the container A. Therefore, it is important to provide them in such a manner as to be spaced apart from each other as described above.

The number of the tabs 23 of the dielectric sheet 7 for reinforcement is determined in consideration of the ease of folding into the container A and the form retention. For example, if the number of the tabs 23 is too large, the interval between the adjacent tabs 23 is narrowed, so that it is difficult to fold into the shape of the container A. If the number of the tabs 23 is too small, the reinforcing effect is weak and the shape is damaged. Resilience. The number of the specific tabs 23 varies depending on the size of the container A formed by the folding (the size of the laminated heat generating sheet 1), etc., and cannot be generally defined, and the size of the container A is set to be substantially the same as that of the general household. Large hours, usually around 9 to 27 pieces.

Further, in order to make the shape retention of the container A more secure, it is preferable that the number of the above-mentioned tabs 23 is set to an odd number (in the example of Fig. 3, the number of the tabs 23 is 19). That is, as shown in FIG. 3, assuming a straight line L passing through the center O and extending in the diameter direction, when the number of the tabs 23 is set to an even number, the straight line L is extended so as not to come into contact with the tabs 23, When the number of the tabs 23 is set to an odd number, the assumed straight line L necessarily comes into contact with the tabs 23. It can be understood that when the number of the tabs 23 is an even number, since the assumed straight line L is a fold line, the laminated heat generating sheet 1 can be easily divided into two halves, and such a fold line is accidentally formed before heating and cooking. As a result, the form retention of the container A is lowered. On the other hand, if the number of the tabs 23 is set to an odd number, since the assumed straight line L is in contact with the tab 23 as shown in FIG. 3, the tab 23 becomes a resistance, and the fold line due to the assumed straight line L can be prevented. Forming can further improve the form retention of the container A.

Further, in the present invention, it is preferable that the protruding piece 23 has an appropriate interval D from the annular base portion 21, and an interval of about 1.0 to 20 mm is set. When the distance D is too small, when the reinforcing dielectric sheet 7 is formed by press or the like, or when the reinforcing dielectric sheet 7 is attached to the surface of the resin sheet 5, damage, deformation, and the like are likely to occur. In addition, when the interval D is too large, the reinforcing effect such as bending of the laminated heat generating sheet 1 may be lowered.

Further, in view of the ease of folding of the laminated heat generating sheet 1, it is preferable that the protruding piece 23 is not connected to the outer peripheral edge of the annular base portion 21, but if all the protruding pieces 23 and the annular base portion 21 are separated, the reinforcing portion is reinforced. When the dielectric sheet 7 is attached to the surface of the resin sheet 5, the annular base portion 21 and the plurality of tabs 23 are attached to each other in a scattered state. Therefore, a structure in which a part of the tabs 23 are connected to the annular base portion 21 by the narrow connecting portion 25 is preferable. By adopting such a configuration, the ease of the folded heat generating sheet 1 folded into the container A and the form retention of the container A are not impaired, and the protruding piece 23 and the annular base portion 21 can be attached to the resin integrally. The surface of the sheet 5. Incidentally, in the example of FIG. 3, three of the 19 pieces are connected to the annular base 21.

Further, the reinforcing dielectric sheet 7 may be attached to the surface of the conductive sheet 3 and the resin sheet 5 and the surface of the resin sheet 5 by using an appropriate adhesive depending on the material. In particular, when a polyxene oxide rubber sheet is used as the resin sheet 5, it is preferred to use a thermosetting polyoxyxene primer (an oligomer of a curable polyoxyl resin) as an adhesive.

In the present invention, for example, the blank sheet B for forming the reinforcing dielectric sheet 7 as shown in Fig. 5 can be produced first, and the laminated heat-generating sheet 1 having the above-described form can be easily produced by using the blank sheet B. As shown in FIG. 5, the blank sheet B is obtained by punching a dielectric sheet such as paper, and the stamped portion 27 corresponds to the surface portion of the resin sheet 5 exposed when the reinforcing dielectric sheet 7 is attached. . In the blank sheet B of this form, the outer end portion of the protruding piece 23 is connected to the peripheral edge portion 29 to be fixed and held, and the annular base portion 21 is connected to a part of the protruding piece 23 by the connecting portion 25 to be held by the fixing piece. That is, the long dielectric sheets are punched, and the stamping portions 27 are mostly formed in a line shape, and the blank sheets B are formed in advance.

Furthermore, while winding the long conductive sheet around the reel, a suitable adhesive (for example, a curable polyoxyl primer) is applied to one side, and a long resin sheet is laminated on the surface (for example, poly Oxygen rubber sheet). The blank sheet B is continuously attached to the surface of the resin sheet of the long laminate produced in this manner. However, at this time, a suitable adhesive is applied to the surface of the blank sheet B in advance. Thus, the long laminated body to which the blank sheet B is attached is obtained, and the resin sheet and the blank sheet B are firmly adhered by pressure bonding under appropriate heating, and finally cut into a predetermined size to obtain a target laminated heat. Slice 1.

Further, in the laminated heat-generating sheet 1 produced as described above, it is preferable that the surface portion of the exposed resin sheet 5 of the press portion 27 is preferably lowered in adhesion. When the surface portion is viscous, the laminated heat-generating sheet 1 may not be folded into the container A, or the sheet 1 may adhere to each other when the laminated heat-generating sheet 1 is stacked, thereby preventing the storage and sale thereof. Such a reduction in the adhesive force can be carried out, for example, by a blasting treatment, a crimping of a rough roll, or the like, or by first mixing the cerium oxide particles in the resin sheet 5. Adhesive, which reduces adhesion.

Referring to Fig. 6 and Fig. 7, the laminated heat generating sheet 1 is placed in a form of a container A (see Fig. 6 (b)) and placed on a holding member of a dielectric system as shown in Fig. 6 (a), for example. The state inside 30 is placed in the induction heating section of the IH cooker and used.

In the present invention, the holding member 30 is formed of a dielectric material similarly to the resin sheet 5 and the reinforcing dielectric sheet 7. In particular, the viewpoint of moldability and the like is preferably formed of a thermoplastic resin, particularly preferably an olefin-based resin, and most preferably formed of polypropylene.

As shown in Fig. 6 (a) and Fig. 7, the holding member 30 is formed of a tapered annular wall 31 having a large diameter at the upper end and a diameter reduced downward, and a lower end of the annular wall 31 is formed toward the lower end. The inner peripheral flange 33 is formed with a handle 34 at its upper end.

The container A formed of the laminated heat-generating sheet 1 of the present invention is housed inside the annular wall 31 of the holding member 30, and is heated and cooked by the IH cooker in a state of being stably held. It is set to accommodate the size of the container A inside.

In particular, as shown in Fig. 7, the container A formed by folding the laminated heat generating sheet 1 is inserted into the annular wall 31 of the holding member 30 by the laminated heat generating sheet 1, and the protruding piece of the dielectric sheet 7 is reinforced. 23, rising from the annular base portion 21, forming a container A in which the laminated heat-generating sheet 1 composed of the conductive sheet 3, the resin sheet 5, and the reinforcing dielectric sheet 7 is folded, and housed in the annular wall of the holding member 30 The interior of 31. Then, the foodstuff 50 is added to the container A, and in this state, the cooking by the IH cooker is performed.

As described above, the shape of the laminated heat-generating sheet 1 of the present invention has been described by taking a circular shape as an example. However, the shape may be rectangular as long as it can be folded into a container, and the dielectric sheet 7 for reinforcement is used. The annular base portion 21 or the endless second slit line X2 formed in the conductive sheet 3 may have a rectangular shape. Further, the annular shape of the annular wall 31 of the holding member 30 may be a rectangular shape.

1‧‧‧Laminated heating sheet
3‧‧‧Conductor
5‧‧‧resin tablets
7‧‧‧Reinforcing dielectric sheets
10‧‧‧ bottom
13‧‧‧Circumferential side wall
21‧‧‧Ring base
23‧‧‧1
25‧‧‧Connecting Department
27‧‧‧The Stamping Department
29‧‧‧The Peripheral Department
30‧‧‧Retaining components
31‧‧‧ annular wall
33‧‧‧Inside flange
34‧‧‧Handle
A‧‧‧ container
B‧‧‧ Blank
50‧‧‧food
X1‧‧‧1st incision line
X2‧‧‧2nd incision line
X3‧‧‧3rd incision line
End of X1a‧‧1 first incision line X1
End of the largest diameter incision line of X2a‧‧‧2nd incision line X2
End of X3a‧‧‧3rd incision line X3
O‧‧‧Center α‧‧‧ gap
Y‧‧‧Incision line to prevent leakage
L‧‧‧ assumed line
D‧‧‧ interval

Fig. 1 is a schematic view showing a cross-sectional structure of a laminated heat generating sheet of the present invention. Fig. 2 is a plan view of the laminated heat generating sheet of Fig. 1. Fig. 3 is a bottom view of the laminated heat generating sheet of Fig. 1. Fig. 4 is a view showing another form of a slit line of a conductive sheet provided in the laminated heat generating sheet of the present invention. Fig. 5 is a plan view showing a blank sheet for the reinforcing dielectric sheet in the laminated heat generating sheet of Fig. 1. Fig. 6 (a) and (b) are half perspective views of a holding member on which the laminated heat generating sheet of Fig. 1 is placed. Fig. 7 is a schematic cross-sectional view showing the procedure of placing the laminated heat generating sheet of Fig. 1 on a holding member.

no

1‧‧‧Laminated heating sheet

5‧‧‧resin tablets

7‧‧‧Reinforcing dielectric sheets

21‧‧‧Ring base

23‧‧‧1

25‧‧‧Connecting Department

L‧‧‧ assumed line

D‧‧‧ interval

O‧‧ Center

Claims (7)

A laminated heat generating sheet for an induction heating cooker, characterized in that a conductive sheet is laminated on one surface of a resin sheet, and a surface of a portion of the resin sheet is exposed, and a ratio is attached to the other surface of the resin sheet The resin sheet has a higher strength reinforcing dielectric sheet. The laminated heat generating sheet for an induction heating cooker according to the first aspect of the invention, wherein the reinforcing dielectric sheet is made of paper. The laminated heat generating sheet for an induction heating cooker according to the first aspect of the invention, wherein the resin sheet is a silicone rubber sheet. The laminated heat generating sheet for an induction heating cooker according to the first aspect of the invention, wherein the reinforcing dielectric sheet has an annular base portion and a radially extending outer side of the annular base portion and extending at intervals from each other The form of most of the tabs. A laminated heat generating sheet for an induction heating cooker according to the fourth aspect of the invention, wherein the protruding piece forms an odd number. A laminated heat generating sheet for an induction heating cooker according to the fourth aspect of the invention, wherein a part of the protruding piece is connected to the annular base. The laminated heat generating sheet for an induction heating cooker according to the first aspect of the invention, wherein the conductive sheet is provided with an eddy current control slit line penetrating the conductive sheet in a thickness direction.