Stain prevention mat for electromagnetic cooker

Abstract

To provide a stain prevention mat for an electromagnetic cooker that prevents cooking equipment such as a cooking pan from moving with the stain prevention mat.SOLUTION: A stain prevention mat 1 comprises a cloth 7 having a circular sheet-like shape and composed of plain woven glass fibers having magnetic-force line permeability and heat resistance, and coat materials 8a, 8b respectively formed on both face of the cloth 7 and essentially composed of silicon having water permeability and heat resistance. Difference between a coefficient of static friction of a first face 2 and a coefficient of static friction of a second face 3 is constituted so as to be 0.08 or more and 0.60 or less. Since by constituting the first face and the second face 3, the first face has a high tackiness compared to the second face, a cooking pot can be tossed while maintaining the state in which the stain prevention mat attaches to a top plate.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] This invention relates to a stain-prevention mat for an electromagnetic cooker, and more particularly to a stain-prevention mat for an electromagnetic cooker that prevents dirt on the bottom of a pot to be heated, overflow, etc. from adhering to the top plate of the electromagnetic cooker. [Background technology]

[0002] When cooking with an electromagnetic cooker, if a pan is placed directly on the top plate of the cooker, dirt on the bottom of the pan and splashes of food can get on the top plate. To prevent this, a stain-prevention mat for electromagnetic cookers has been used, which is sandwiched between the top plate of the cooker and the bottom of the pan.

[0003] Patent Document 1 discloses a stain-prevention mat made by cutting a woven fabric made of glass fibers that is permeable to magnetic lines of force, with non-permeable, heat-resistant silicone applied to the entire surface on both sides, into a circular sheet.

[0004] FIG. 3 is a cross-sectional view that typically shows a state in which a conventional stain-prevention mat for an electromagnetic cooker is used in an electromagnetic cooker.

[0005] Referring to the figure, a stain-prevention mat 51 is placed on a top plate 52 of an electromagnetic cooker, and a pot 53 is placed thereon.

[0006] The dirt prevention mat 51 has cushioning properties because it uses woven fabric as its core material, and because both sides of the mat are coated with water-impermeable, heat-resistant silicone, the entire dirt prevention mat 51 has water-impermeable and heat-resistant properties.

[0007] The stain prevention mat 51, when used, prevents dirt from directly adhering to the top plate 52 even when dirt adheres to the bottom surface 54 of a pot 53 or food splashes onto it, keeping the top plate in a beautiful condition and eliminating the need for the trouble of cleaning.

[0008] In addition, since the surface coated with silicone has tackiness (surface stickiness), it fits to the top plate 52, which is a glass tabletop, and prevents the stain prevention mat 1 from shifting during cooking.

[0009] Patent Document 2 discloses a protective mat that includes a sheet-like substrate made of glass fiber, with a first coating layer and a second coating layer made of silicone rubber formed on both sides of the substrate. The second coating layer has a predetermined surface unevenness, friction coefficient, and composite Young's modulus that are equivalent to those of the first coating layer.

[0010] This construction is said to provide a moderately large frictional resistance between the top plate of the induction cooker and the silicone rubber particles of the first coating layer of the protective mat, preventing the mat from slipping during cooking. Also, since either the first or second coating layer can be used in the same way, it is said that only one side is less likely to wear out, making it possible to work comfortably for a long period of time. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] JP 2009-140887 A [Patent Document 2] JP 2015-128081 A Summary of the Invention [Problem to be solved by the invention]

[0012] As shown in Figure 3 above, when the stain-prevention mat 51 is installed, the first surface, which is the lower surface, contacts the top plate 52 of the induction cooker, while the second surface, which is the upper surface, contacts the bottom surface 54 of the pot 53.

[0013] Here, in the mat of Patent Document 2, since both sides have equal frictional resistance, when a pot 53 (including a frying pan or other cooking utensil used with an induction cooker) is placed on the stain-prevention mat 51 during cooking and then shaken, there is a risk that the stain-prevention mat 51 will move together with the pot 53 and become displaced from its designated installation position.

[0014] The present invention has been made to solve the above-mentioned problems, and has an object to provide a stain-prevention mat for an electromagnetic cooker that prevents cooking utensils such as pots from moving together during cooking. [Means for solving the problem]

[0015] In order to achieve the above object, the invention described in claim 1 is a stain-prevention mat for an induction cooker that is used by being sandwiched between the top plate of the induction cooker and the bottom surface of a pot heated by the induction cooker, the mat being made of a heat-resistant sheet body that is permeable to magnetic lines, the surface of the sheet body that comes into contact with the induction cooker being designated as a first surface, and the surface opposite to the first surface that comes into contact with the bottom surface of the pot being designated as a second surface, the static friction coefficient of the first surface being greater than the static friction coefficient of the second surface, and the difference between the static friction coefficients of the first surface and the second surface being 0.08 or more and 0.60 or less.

[0016] With this configuration, the first surface of the sheet body has stronger tackiness than the second surface of the sheet body.

[0017] The invention described in claim 2 is the same as the invention described in claim 1, in which the static friction coefficient of the first surface is 0.50 or more and 0.90 or less, and the static friction coefficient of the second surface is 0.30 or more and 0.71 or less.

[0018] This configuration reduces the risk of minute movements occurring when the induction cooker is in operation, and also makes it easier to accurately install the sheet body in a specified position on the top plate.

[0019] The invention described in claim 3 is the same as the invention described in claim 1 or claim 2, in which the sheet body is composed of a sheet-like fiber made of heat-resistant fibers and a coating material having water impermeability formed on both sides of the sheet-like fiber.

[0020] With this configuration, the sheet has cushioning properties and uniform tackiness on one surface.

[0021] The invention described in claim 4 is the structure of the invention described in claim 3, wherein the coating amount of the coating material formed on the first surface is 13 g / m in dry weight. 2 More than 500g / m 2 The coating amount of the coating material formed on the second surface is 5 g / m2 or less in dry weight. 2 More than 60g / m 2 It is as follows:

[0022] With this configuration, the sheet body has a predetermined static friction coefficient on each side.

[0023] The invention described in claim 5 is the configuration of the invention described in claim 3, in which the coating thickness of the coating material formed on the first surface is 7 μm or more and 286.1 μm or less, and the coating thickness of the coating material formed on the second surface is 2 μm or more and 34.3 μm or less.

[0024] With this configuration, the sheet body has a predetermined static friction coefficient on each side.

[0025] The invention described in claim 6 is the same as the invention described in claim 3, in which the sheet-like fiber contains glass fiber.

[0026] With this construction, a stain-preventing mat having a predetermined strength and excellent heat resistance, impact resistance, and flexibility is obtained.

[0027] The invention described in claim 7 is the same as the invention described in claim 4, in which the sheet-like fiber contains glass fiber.

[0028] With this construction, a stain-preventing mat having a predetermined strength and excellent heat resistance, impact resistance, and flexibility is obtained.

[0029] The invention described in claim 8 is the same as the invention described in claim 5, in which the sheet-like fiber contains glass fiber.

[0030] With this construction, a stain-preventing mat having a predetermined strength and excellent heat resistance, impact resistance, and flexibility is obtained.

[0031] The invention described in claim 9 is the same as the invention described in claim 3, in which the coating material contains silicone.

[0032] With this configuration, the surface of the dirt prevention mat has anti-slip properties, heat resistance, and water impermeability.

[0033] The invention described in claim 10 is the same as the invention described in claim 4, in which the coating material contains silicone.

[0034] With this configuration, the surface of the dirt prevention mat has anti-slip properties, heat resistance, and water impermeability.

[0035] The invention described in claim 11 is the same as the invention described in claim 5, in which the coating material contains silicone.

[0036] With this configuration, the surface of the dirt prevention mat has anti-slip properties, heat resistance, and water impermeability. Effect of the Invention

[0037] As explained above, the invention described in claim 1 has a stronger tackiness on the first side than on the second side of the sheet body, so that the sheet body can be kept fitted to the top plate while shaking the pot.

[0038] The invention described in claim 2, in addition to the effects of the invention described in claim 1, reduces the risk of minute movements occurring when the induction cooker is in operation and makes it easier to accurately install the sheet body in a specified position on the top plate, thereby improving usability.

[0039] The invention described in claim 3 has, in addition to the effects of the invention described in claim 1 or 2, cushioning properties and uniform tackiness on one side, making it less likely to scratch top plates or pots and making the tackiness easier to control.

[0040] The invention as set forth in claim 4 has the effect of the invention as set forth in claim 3, and in addition, since the sheet has a predetermined static friction coefficient on each of its two sides, it stably exhibits the desired tackiness.

[0041] The invention as set forth in claim 5 has the effect of the invention as set forth in claim 3, and in addition, since the sheet has a predetermined static friction coefficient on each of its two sides, it stably exhibits the desired tackiness.

[0042] The invention described in claim 6 provides, in addition to the effects of the invention described in claim 3, a stain-prevention mat that has a predetermined strength and is excellent in heat resistance, impact resistance, and flexibility, thereby improving usability.

[0043] The invention described in claim 7 provides, in addition to the effects of the invention described in claim 4, a stain-prevention mat that has a predetermined strength and is excellent in heat resistance, impact resistance, and flexibility, thereby improving usability.

[0044] The invention described in claim 8 provides, in addition to the effects of the invention described in claim 5, a stain-prevention mat that has a predetermined strength and is excellent in heat resistance, impact resistance, and flexibility, thereby improving usability.

[0045] The invention described in claim 9 has the same effects as the invention described in claim 3, and in addition, the surface of the stain prevention mat has anti-slip properties, heat resistance, and water impermeability, making it a user-friendly stain prevention mat.

[0046] The invention described in claim 10 has the same effects as the invention described in claim 4, and in addition, the surface of the stain prevention mat has anti-slip properties, heat resistance, and water impermeability, making it a user-friendly stain prevention mat.

[0047] The invention described in claim 11 has the same effects as the invention described in claim 5, and in addition, the surface of the stain prevention mat has anti-slip properties, heat resistance, and water impermeability, making it a user-friendly stain prevention mat. [Brief description of the drawings]

[0048] [Figure 1] 1 is a perspective view showing a stain prevention mat for an electromagnetic cooker according to a first embodiment of the present invention; [Diagram 2] 2 is an enlarged cross-sectional view taken along line II-II of FIG. 1. [Diagram 3] FIG. 1 is a cross-sectional view showing a conventional stain-prevention mat for an electromagnetic cooker used in the electromagnetic cooker. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0049] FIG. 1 is a perspective view showing a stain prevention mat for an electromagnetic cooker according to a first embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view taken along the line II-II shown in FIG.

[0050] Referring to these figures, the stain prevention mat 1 is a circular sheet body, and is mainly composed of a woven fabric 7 of sheet-like fibers made of plain-woven glass fibers that are permeable to magnetic lines and heat-resistant, and coating materials 8a, 8b made of water-impermeable, heat-resistant silicone formed on both sides of the woven fabric 7. In this specification, silicone means silicone resin, silicone rubber, and both of them.

[0051] In this way, when the sheet-like material is the woven fabric 7 formed by weaving glass fibers, the stain-prevention mat 1 has a certain strength and is excellent in heat resistance, impact resistance, and flexibility. In addition, since the glass fibers can be general-purpose ones that are generally available, it is possible to reduce the manufacturing cost. Furthermore, when the coating materials 8a, 8b are made of silicone, the surface of the stain-prevention mat 1 has anti-slip properties, heat resistance, and water impermeability, making the stain-prevention mat 1 easy to use.

[0052] To explain the structure and effects of the stain-prevention mat 1 in more detail, the stain-prevention mat 1 has cushioning properties because it uses woven fabric 7 as its central material. In addition, the mesh of the woven fabric 7 is filled with impermeable coating materials 8a and 8b, preventing dirt from reaching the inside of the woven fabric 7, so that the stain-prevention mat 1 as a whole has impermeability.

[0053] When the stain-prevention mat 1 is used, it is placed between the top plate 52 of an electromagnetic cooker and the bottom surface 54 of a pot 53 heated by the electromagnetic cooker, similar to the conventional stain-prevention mat 51 shown in Fig. 3 described above. That is, the first surface 2 of the stain-prevention mat 1 is the lower surface in the installed state and is the surface that contacts the top plate 52 of the electromagnetic cooker, and the second surface 3, which is the surface opposite to the first surface 2, is the surface that contacts the bottom surface 54 of the pot 53. In this way, the stain-prevention mat 1 prevents dirt and food splashes adhering to the bottom surface 54 of the pot 53 from directly adhering to the top plate 52.

[0054] Furthermore, the soil-prevention mat 1 is easy to handle because it does not damage the top plate 52 or pot 53 or break during use due to its own cushioning properties. Also, the woven fabric 7 made of glass fiber is a material that is excellent not only in cushioning properties but also in heat resistance and impact resistance, which further improves reliability during use. Also, the soil-prevention mat 1 is excellent in terms of cost (economic efficiency).

[0055] Furthermore, since the coating materials 8a and 8b are heat resistant, there is no danger of them melting during cooking, and they exhibit anti-slip properties on the bottom surface of the pot 53 and the top plate 52, making them even easier to use. Furthermore, since the coating materials 8a and 8b are water repellent, not only is there no risk of liquid dirt penetrating into the woven fabric 7, but they can also be easily washed with water, making it possible to use the stain-prevention mat 1 in a more hygienic manner.

[0056] Next, there is a difference in the coating amount of the coating materials 8a, 8b, and the coating amount of the coating material 8a formed on the first surface 2 side of the stain-prevention mat 1 is set to be greater than the coating amount of the coating material 8b formed on the second surface 3 side.

[0057] The static friction coefficient of the first surface 2 of the stain prevention mat 1 is configured to be greater than the static friction coefficient of the second surface 3. The smaller the static friction coefficient, the more slippery the surface is, i.e., the less tacky it is, whereas the larger the static friction coefficient, the less slippery the surface is and the more tacky it is.

[0058] Here, if the tackiness of the first surface 2 is too weak, the stain-prevention mat 1 is difficult to fix in position after installation, and there is a risk that it may move during cooking. On the other hand, if the tackiness of the first surface 2 is too strong, when the stain-prevention mat 1 is installed on the top plate 52, the first surface 2 will stick firmly to the top plate 52, and even if an attempt is made to slightly shift the stain-prevention mat 1 after installation to achieve delicate positioning, it will not move easily, and there is a risk that it will be difficult to install the stain-prevention mat 1 in the specified position.

[0059] Also, if the tackiness of the second surface 3 is too weak, the surface is slippery, and the pot 53 may shift during cooking, which may cause problems with cooking. That is, in an electromagnetic cooker, magnetic lines are generated from a coil installed under the top plate 52, which generates eddy currents on the bottom surface 54 of the pot 53, which generates heat. At that time, the pot 53 vibrates slightly, and if the tackiness of the second surface 3 is too weak, the tackiness cannot absorb the vibrations and the pot 53 is likely to slide on the second surface 3, which may result in the pot 53 shifting from its designated position on the top plate 52. On the other hand, if the tackiness of the second surface 3 is too strong, resistance is generated between the pot 53 and the second surface 3 due to the tackiness of the second surface 3 of the stain prevention mat 1 when the pot 53 is moved in a fanning manner during cooking, which hinders the movement of the pot 53. In the worst case, when the bottom of the pot 53 is brought into contact with the second surface 3, the pot 53 may get caught on the second surface 3, making it difficult to shake the pot 53 during cooking. Furthermore, if there is an imbalance between the tackiness of the first surface 2 and the tackiness of the second surface 3, when the pot 53 is moved during cooking so that the bottom of the pot 53 comes into contact with the second surface 3, the second surface 3 will get caught on the bottom of the pot 53 and the first surface 2 will easily slip off the top plate 52, resulting in the stain-prevention mat 1 peeling off from the top plate 52 during cooking.

[0060] As described above, there is a close relationship between the tackiness of the first surface 2 and the second surface 3. In order to achieve both and improve the feel when cooking, the stain-prevention mat 1 of the present invention is configured so that the difference between the static friction coefficient of the first surface 2 and the static friction coefficient of the second surface 3 is 0.08 or more and 0.60 or less.

[0061] With this configuration, the first surface 2 has stronger tackiness than the second surface 3, so that the stain prevention mat 1 can be kept fitted to the top plate while shaking the pot.

[0062] Moreover, it is more preferable that the difference between the static friction coefficient of the first surface 2 and the static friction coefficient of the second surface 3 is 0.10 or more and 0.60 or less. By configuring in this way, the feel when shaking the pot during cooking is further improved.

[0063] Furthermore, it is preferable that the static friction coefficient of the first surface 2 is 0.50 or more and 0.90 or less, and the static friction coefficient of the second surface 3 is 0.30 or more and 0.71 or less. This configuration reduces the risk of minute movements occurring during operation of the electromagnetic cooker, and also makes it easier to accurately install the sheet body at a predetermined position on the top plate, improving usability.

[0064] The coating amount of the coating material 8a formed on the first surface 2 is 13 g / m2 in terms of dry weight. 2 More than 500g / m 2 The coating amount of the coating material 8b formed on the second surface 3 is 5 g / m2 or less in terms of dry weight. 2 More than 60g / m 2 By configuring in this way, a sheet body having a predetermined static friction coefficient on each of its two sides is obtained, and therefore the desired tackiness is stably exhibited.

[0065] Moreover, it is preferable that the coating thickness (thickness after drying) of the coating material 8a formed on the first side 2 is 7 μm or more and 286.1 μm or less, and the coating thickness of the coating material 8b formed on the second side 3 is 2 μm or more and 34.3 μm or less. By configuring in this way, a sheet body having a predetermined static friction coefficient on each of the two sides is formed, and the desired tackiness is stably exhibited.

[0066] The thickness of the stain prevention mat 1 is preferably 0.65 mm or less. This configuration reduces the effect on the temperature sensor that detects the temperature of the top plate 52, reducing the risk of malfunctions occurring when using an electromagnetic cooker. The thickness of the woven fabric 7, which is a sheet-like material, is preferably 0.02 mm or more and 0.42 mm or less. This configuration provides both cushioning properties and sufficient tear strength.

[0067] In the above embodiment, the stain prevention mat is made of a woven fabric and a coating material formed on both sides of the woven fabric, but it may be made of silicone only.

[0068] In the above embodiment, the sheet-like material is a woven fabric made of plain woven glass fibers, but it may contain glass fibers in part, or may be made of other fibers having magnetic field line permeability and heat resistance, or other materials. For example, it may be a nonwoven fabric made of glass fibers, a woven or nonwoven fabric made of carbon fibers or ceramic fibers, or paper.

[0069] Furthermore, in the above embodiment, the coating material is formed on the entire surface of both sides of the woven fabric, but it may be formed only on a part of the surface. If the stain prevention mat is made of silicone only without using woven fabric, the coating material may not be necessary.

[0070] Furthermore, in the above embodiment, the coating material is made of silicone, but it may contain silicone in part, or may be made of other non-permeable materials. It is preferable that the coating material is permeable to magnetic lines of force, but even if it is non-permeable above a certain thickness, it can be used in the same way as long as it can ensure permeability by reducing the thickness below the certain thickness.

[0071] Furthermore, in the above embodiment, the stain prevention mat is circular, but it may be other shapes such as rectangular or doughnut-shaped. If an opening is formed in the center like the doughnut-shaped mat, it can be used as a stain prevention mat for a gas stove by placing it under the trivet of a gas stove other than an electromagnetic cooker. Therefore, in the present invention, even if it can be used as a stain prevention mat for a gas stove, it is included in the scope of the present invention as long as it can be used as a stain prevention mat for an electromagnetic cooker.

[0072] Furthermore, in the above embodiment, the static friction coefficients are set differently between the first and second sides by varying the amount of coating material applied, but the static friction coefficients may be set by other means, such as by using different types of coating materials or by performing a finishing process that changes the static friction coefficient. EXAMPLES

[0073] The present invention will be described in detail below with reference to examples, although the embodiments of the present invention are not limited to the examples. (Preparation of Examples and Comparative Examples) A silicone coating material was formed on both sides of a sheet-like material made of glass fiber with different coating amounts and coating thicknesses to prepare Examples 1 to 5 and Comparative Examples 1 and 3. Moreover, Comparative Example 2 was prepared in which only the second side was replaced with a fluororesin.

[0074] The glass fibers used were the same in all cases, and had the composition shown in Table 1 below.

[0075] [Table 1] The coating amount and coating thickness of each coating material are shown in Table 2. Note that both the coating amount and coating thickness are measured after drying.

[0076] In addition, the following equipment was prepared:

[0077] Induction cooker: HT-J200HTF (Hitachi, Ltd.) Frying pan: Product name: IH Ruby Excellence Frying Pan 21cm (Product number: C62202) (Group Seven Japan Co., Ltd.) Aluminum Yukihira pot: Product name: Light and durable hammered Yukihira pot, diameter 25cm, weight 500g (Hokuriku Aluminum Co., Ltd.) (Measurement of static friction coefficient) The static friction coefficient of the first and second surfaces of each of the examples and comparative examples was measured according to JIS P8147:2010. The size of the test piece was 5 cm x 7 cm. The contact surface was a cotton cloth (nominal number 3-1) of JIS L0803: white cloth (single fiber cloth) for dye fastness test. The pulling speed was 100 mm / min. (Measurement of coating thickness of coating material) The coating thickness of the coating material on the first and second surfaces of each of the examples and comparative examples (also simply referred to as "thickness of coating material") is the arithmetic average of the thickness values ​​of the coating material obtained by observing the surface of a sheet body embedded in epoxy resin and polished so that the cross section of the sheet body is the observation surface with a scanning electron microscope (SEM), and measuring the thickness of the coating material on the first and second surfaces of the sheet body at 10 points at intervals of 200 μm in a direction perpendicular to the thickness of the coating material (i.e., a direction parallel to the woven glass fiber fabric used as the material of the sheet). The name of the scanning electron microscope used for observing the cross section of the sheet body with a scanning electron microscope and the measurement conditions are as follows. In addition, as a pretreatment for observation with a scanning electron microscope, the sheet body to be observed was embedded in epoxy resin, mechanically polished, and then carbon deposition was performed. Device name: Hitachi High-Technologies Corporation scanning electron microscope (model number: S-3700N), measurement conditions: measurement magnification 150x, acceleration voltage 5kV, vacuum degree 10Pa, backscattered electron image acquisition In addition, these images obtained by the scanning electron microscope were analyzed using image analysis software (WinRoof2018 manufactured by Mitani Corporation) under conditions of measuring the distance between two points. (Test 1: Shaking a pot while cooking) A stain-prevention mat (21 cm in diameter) from each Example and Comparative Example was laid on the top plate (glass top) of an electromagnetic cooker placed on a conveyor, and a frying pan was placed on the mat. With the frying pan fixed (i.e., with the frying pan placed on the stain-prevention mat laid on the glass top), the conveyor was moved horizontally for 200 mm at a speed of 200 mm / s, and an evaluation was made as to whether the stain-prevention mat peeled off from the top plate or not (Evaluation 1).

[0078] Cases where there was no peeling at all were marked with an ◎, cases where there was almost no peeling (less than 5 mm even if the whole piece moved, or less than 5 mm even if the edges were turned up) were marked with a ○, and cases where there was peeling (more than 5 mm overall movement, or more than 5 mm of the edges were turned up) were marked with an ×.

[0079] The results of Tests 1 to 3 are shown in Table 2 below. (Test 2) With the stain prevention mat of each Example and Comparative Example placed between the top plate and an empty aluminum pot, the heat of an electromagnetic cooker was set to 13, and the movement of the aluminum pot was evaluated (Evaluation 2). If the aluminum pot did not move within 10 seconds, it was marked with an ◯, and if it moved, it was marked with an ×. (Test 3) The time required for ten evaluators to place the stain prevention mat (diameter 21 cm) of each Example and Comparative Example in the designated position on the top plate was measured. The arithmetic mean value of less than 5 seconds was marked as ◯, and the value of 5 seconds or more was marked as × (rating 3). (result) The configurations of the respective examples and comparative examples and the results of tests 1 to 3 are as follows.

[0080] [Table 2] Referring to Table 2, it was confirmed that if the difference in the static friction coefficient between the first surface and the second surface is 0.08 or more and 0.60 or less, all of the evaluations 1 to 3 will be ◯ or ◎, which means that the pots and pans etc. and the stain prevention mat will be prevented from moving together during cooking, the pots and pans etc. will be prevented from moving when heated using an induction cooker, and the stain prevention mat will be easily installed in the designated position.

[0081] Moreover, with reference to Examples 2 to 5, it was confirmed that when the difference in the static friction coefficient between the first surface and the second surface is 0.10 or more, the evaluation 1 was ⊚ in all cases, which is even more preferable.

[0082] Furthermore, it was confirmed that the results of evaluations 1 to 3 were favorable when the static friction coefficient of the first surface was 0.50 or more and 0.90 or less, and the static friction coefficient of the second surface was 0.30 or more and 0.71 or less.

[0083] Furthermore, the coating weight of the coating material formed on the first surface is 13 g / m2 in dry weight. 2 More than 500g / m 2 The coating amount of the coating material formed on the second surface is 5 g / m2 or less in dry weight. 2 More than 60g / m 2 It was confirmed that the results of evaluations 1 to 3 were favorable when the following conditions were met.

[0084] Furthermore, it was confirmed that the results of evaluations 1 to 3 were favorable when the coating thickness of the coating material formed on the first surface was 7 μm or more and 286.1 μm or less, and the coating thickness of the coating material formed on the second surface was 2 μm or more and 34.3 μm or less. [Explanation of symbols]

[0085] 1. Dirt prevention mat 2…Front page 3…Second side 7…Woven fabric 8…Coating material 51…Stain prevention mat 52…Top plate 53...Pot 54…Bottom In addition, the same symbols in each drawing indicate the same or corresponding parts.

Claims

1. A stain-preventing mat for induction cookers, which is used by being placed between the top plate of an induction cooker and the bottom surface of a pot heated by the induction cooker, It consists of a heat-resistant sheet body that is permeable to magnetic field lines, When the surface of the sheet body that contacts the induction cooker is designated as the first surface, and the surface opposite to the first surface that contacts the bottom surface of the pot is designated as the second surface, The static friction coefficient of the first surface is greater than the static friction coefficient of the second surface. The difference between the static friction coefficient of the first surface and the static friction coefficient of the second surface is 0.08 or more and 0.60 or less. A stain-preventing mat for induction cookers, wherein the static friction coefficient of the first surface is 0.50 or more and 0.90 or less.

2. A stain-preventing mat for induction cookers, which is used by being placed between the top plate of an induction cooker and the bottom surface of a pot heated by the induction cooker, It consists of a heat-resistant sheet body that is permeable to magnetic field lines, When the surface of the sheet body that contacts the induction cooker is designated as the first surface, and the surface opposite to the first surface that contacts the bottom surface of the pot is designated as the second surface, The static friction coefficient of the first surface is greater than the static friction coefficient of the second surface. The difference between the static friction coefficient of the first surface and the static friction coefficient of the second surface is 0.08 or more and 0.60 or less. The first surface has stronger tackiness than the second surface, making it a stain-resistant mat for induction cooktops.

3. A stain-preventing mat for induction cookers, which is used by being placed between the top plate of an induction cooker and the bottom surface of a pot heated by the induction cooker, It consists of a heat-resistant sheet body that is permeable to magnetic field lines, When the surface of the sheet body that contacts the induction cooker is designated as the first surface, and the surface opposite to the first surface that contacts the bottom surface of the pot is designated as the second surface, The static friction coefficient of the first surface is greater than the static friction coefficient of the second surface. The difference between the static friction coefficient of the first surface and the static friction coefficient of the second surface is 0.08 or more and 0.60 or less. The aforementioned sheet material has a thickness of 0.65 mm or less, and is a stain-preventing mat for induction cooktops.

4. The stain-preventing mat for induction cookers according to Claim 1, wherein the static friction coefficient of the second surface is 0.30 or more and 0.71 or less.

5. The static friction coefficient of the first surface is 0.50 or more and 0.90 or less. The stain-preventing mat for induction cookers according to claim 2 or claim 3, wherein the static friction coefficient of the second surface is 0.30 or more and 0.71 or less.

6. The aforementioned sheet body is A sheet-like fiber composed of heat-resistant fibers, A stain-preventing mat for induction cookers according to any one of claims 1 to 4, comprising a sheet-like fiber and a non-permeable coating material formed on both sides of the sheet-like fiber.

7. The amount of coating material applied to the first surface is 13 g / m² by dry weight. ２ More than 500g / m ２ The following: The amount of coating material applied to the second surface is 5 g / m² by dry weight. ２ 60g / m or more ２ The following is the stain-preventing mat for induction cookers according to claim 6.

8. The coating thickness of the coating material formed on the first surface is 7 μm or more and 286.1 μm or less. The coating thickness of the coating material formed on the second surface is 2 μm or more and 34.3 μm or less, as described in claim 6, for an induction cooktop stain-resistant mat.

9. The aforementioned sheet-like fibers include glass fibers, as described in claim 6, for the stain-preventing mat for induction cookers.

10. The aforementioned sheet-like fibers include glass fibers, as described in claim 7, for the stain-preventing mat for induction cookers.

11. The aforementioned sheet-like fibers include glass fibers, as described in claim 8, for the stain-preventing mat for induction cookers.

12. The coating material comprises silicone, as described in claim 6, for the stain-resistant mat for induction cookers.

13. The coating material comprises silicone, as described in claim 7, for the stain-resistant mat for induction cookers.

14. The coating material comprises silicone, as described in claim 8, for the stain-resistant mat for induction cookers.

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