JP2016011761A - Top plate for cooking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a top plate for a cooking device which is capable of preventing soup and the like from infiltrating into a rear surface of the top plate.SOLUTION: A top plate for a cooking device 1 has an opening 14 formed therein. The top plate 1 includes: a glass plate 10; an inorganic pigment layer 11 disposed on the glass plate 10; a heat resistant resin layer 12 disposed on the inorganic pigment layer 11; and a dirt prevention layer 13 that is disposed on the heat resistant resin layer 12 and contains a modified silicone resin.

Description

  The present invention relates to a top plate for a cooker in which an opening is formed.

  A glass plate made of crystallized glass or the like having a low coefficient of thermal expansion is used for the top plate for a cooker. When a colorless glass plate is used as the glass plate, in general, in order to conceal the internal structure of the cooker, a porous surface made of an inorganic pigment and glass powder is provided on the back surface opposite to the cooking surface on which the cooking utensils are placed. A high-quality inorganic pigment layer and a heat-resistant resin layer made of a silicone-based resin are provided (Patent Document 1).

  In the case of a gas cooker top plate or the like, an opening for passing a gas burner portion is formed in the cooker top plate. In addition, a saucer for receiving the soup is provided near the back of the top plate for the cooker in order to prevent spilled soup from falling through the opening and falling into the cooker during cooking. Yes.

  By the way, since a saucer is comprised with the thin metal, a saucer deform | transforms with the heat | fever of the atmosphere at the time of cooking, and the boiled juice received with the saucer may contact the top plate back surface for cookers. In addition, even if the broth does not come into contact with the back of the top plate for the cooker, the broth received by the saucer is heated by the heat during cooking, and its steam is generated, and the steam generated from the soup and the top plate for the cooker The back side may come into contact. When boiled juice or boiled steam comes into contact with the back side, the inorganic pigment layer and the heat-resistant resin layer formed on the back side have a rough structure. It is recognized as dirt on the appearance.

JP 2010-9958 A

  The objective of this invention is providing the top plate for cookers which can suppress permeation of boiled juice etc., even if boiled juice etc. contact the back surface of the top plate for cookers.

  The top plate for a cooker of the present invention is a top plate for a cooker in which an opening is formed, and includes a glass plate, an inorganic pigment layer provided on the glass plate, and a heat resistance provided on the inorganic pigment layer. It is characterized by comprising a resin layer and an antifouling layer containing a modified silicone resin provided on the heat resistant resin layer.

  The antifouling layer may contain scaly metal powder.

  The inorganic pigment layer preferably contains a pigment and glass.

  The heat-resistant resin layer preferably contains a silicone resin.

  An opening is an opening for letting a gas burner pass, for example.

  According to the present invention, it is possible to prevent the soup from simmering in the back surface of the top plate.

It is typical sectional drawing which shows the top plate for cookers of one Embodiment of this invention.

  Hereinafter, preferred embodiments will be described. However, the following embodiments are merely examples, and the present invention is not limited to the following embodiments. Moreover, in each drawing, the member which has the substantially the same function may be referred with the same code | symbol.

  FIG. 1 is a schematic cross-sectional view illustrating a top plate for a cooker according to an embodiment of the present invention. The top plate 1 for a cooker according to this embodiment includes a glass plate 10, an inorganic pigment layer 11 provided on the glass plate 10, a heat resistant resin layer 12 provided on the inorganic pigment layer 11, and a heat resistant resin layer. 12 and an antifouling layer 13 provided on the upper surface. In the glass plate 10, the inorganic pigment layer 11, the heat resistant resin layer 12, and the stain prevention layer 13 are provided on the back surface 10b located on the opposite side to the cooking surface 10a on which the cooking utensil is placed.

  An opening 14 is formed in the central portion of the cooker top plate 1. A gas burner portion 20 of the cooking device is passed through the opening portion 14. A saucer 21 is provided below the cooker top plate 1. During cooking, the spilled broth falls through the opening 14 and falls, but the saucer 21 receives the broth.

  The glass plate 10 may be colored and transparent, but is preferably colorless and transparent from the viewpoint of enhancing the aesthetics of the top plate. In addition, being colorless and transparent means a state in which a colorant is intentionally added to a glass raw material and is not colored, and includes a state in which the glass raw material is colored.

On the top plate for a cooker, heating and cooling are repeated. For this reason, it is preferable that the glass plate 10 has excellent heat resistance and a low thermal expansion coefficient. Specifically, the softening temperature of the glass plate 10 is preferably 700 ° C. or higher, and more preferably 750 ° C. or higher. The average linear thermal expansion coefficient at 30 ° C. to 750 ° C. of glass plate 10 is preferably in the range of ^{-10 × 10 -7 / ℃ ~ +} 30 × 10 -7 / ℃, -10 × 10 -7 It is more preferable to be within the range of / ° C to + 20 × 10 ⁻⁷ / ° C. For this reason, the glass plate 10 is preferably glass, crystallized glass, or tempered glass having a high glass transition temperature and a low thermal expansion coefficient. As a specific example of the crystallized glass having a high glass transition temperature and a low thermal expansion coefficient, for example, Neoceram N-0 manufactured by Nippon Electric Glass Co., Ltd. can be mentioned.

  The inorganic pigment layer 11 is provided on the back surface 10 b of the glass plate 10. The inorganic pigment layer 11 is preferably formed on the entire back surface 10 b of the glass plate 10. However, it is not necessarily formed on the entire surface. The thickness of the inorganic pigment layer 11 is preferably in the range of 1 to 10 μm, and more preferably in the range of 3 to 7 μm. If the thickness of the inorganic pigment layer 11 is too thin, the concealability required for the inorganic pigment layer may not be obtained. If the thickness of the inorganic pigment layer 11 is too thick, the inorganic pigment layer may be peeled off due to the influence of the difference in thermal expansion coefficient from the glass plate.

The inorganic pigment layer 11 preferably contains a pigment and glass. As pigments, mica coated with an inorganic oxide, TiO ₂ , ZrO ₂ , ZrSiO ₄ , Co—Al—Zn, Co—Al—Si, Co—Al—Ti, Co—Al— Cr, Co-Ni-Ti-Zn, Ti-Sb-Cr, Ti-Ni, Co-Si, Ti-Fe-Zn, Fe-Zn, Fe-Ni-Cr, Fe- Co-Cr-based, Zn-Fe-Cr-Al-based, Co-Cr-Fe-based, Cu-Cr-based, Cu-Cr-Fe-based, and Cu-Cr-Mn-based inorganic pigments are used alone or in combination. Can do. In the inorganic pigment layer 11, the inorganic pigment is preferably dispersed in a glass matrix serving as a binder. Examples of the glass constituting the glass matrix include B ₂ O ₃ —SiO ₂ system, Na ₂ O—CaO—SiO ₂ system, Li ₂ O—Al ₂ O ₃ —SiO ₂ system, and ZnO—Al ₂ O ₃ —. A glass such as P ₂ O ₅ can be used.

  The content of the inorganic pigment in the inorganic pigment layer 11 is preferably in the range of 40% by mass to 90% by mass, and more preferably in the range of 40% by mass to 70% by mass. Therefore, the glass content in the inorganic pigment layer 11 is preferably in the range of 10% by mass to 60% by mass, and more preferably in the range of 30% by mass to 60% by mass. If the content of the inorganic pigment in the inorganic pigment layer 11 is too small, the concealability required for the inorganic pigment layer may not be obtained. In addition, if the content of the inorganic pigment is too large, the glass content is relatively lowered, so that the minimum adhesion strength with the glass plate may not be obtained.

  The inorganic pigment layer 11 can be formed by firing a mixture of inorganic pigment powder and glass powder. Specifically, for example, the paste can be formed by preparing a paste containing an inorganic pigment powder, a glass powder, a resin binder, and a solvent, applying the paste, and firing the paste. As a method for applying the paste, for example, a screen printing method can be used.

  The inorganic pigment layer 11 is preferably porous. By making it porous, when the glass plate 10 is repeatedly heated and cooled by cooking or the like, and the temperature of the glass plate 10 changes, the inorganic pigment layer 11 becomes difficult to peel off from the glass plate 10. In order to make the inorganic pigment layer 11 porous, the ratio of the glass powder to the inorganic pigment may be reduced.

  On the inorganic pigment layer 11, a heat resistant resin layer 12 is provided. The heat resistant resin layer 12 preferably contains an inorganic pigment powder and a resin binder. In such a heat resistant resin layer 12, it is preferable that the inorganic pigment powder is dispersed in the resin binder. Since the heat resistant resin layer 12 is for shielding light, the inorganic pigment powder is preferably a colored inorganic pigment. As the resin binder, a heat-resistant resin is preferably used, and for example, a silicone resin can be used.

  The content of the inorganic pigment in the heat-resistant resin layer 12 is preferably in the range of 30% by mass to 70% by mass, and more preferably in the range of 40% by mass to 60% by mass. Therefore, the content of the resin binder in the heat-resistant resin layer 12 is preferably in the range of 30% by mass to 70% by mass, and more preferably in the range of 40% by mass to 60% by mass. If the content of the inorganic pigment in the heat resistant resin layer 12 is too small, the concealability required for the heat resistant resin layer 12 may not be obtained. Moreover, when there is too much content of an inorganic pigment, adhesiveness with the inorganic pigment layer 11 may fall.

  The thickness of the heat resistant resin layer 12 is preferably in the range of 2 to 15 μm, and more preferably in the range of 3 to 10 μm. If the heat resistant resin layer 12 is too thin, the concealability required for the heat resistant resin layer 12 may not be obtained. If the heat-resistant resin layer 12 is too thick, the heat-resistant resin layer 12 may be peeled off from the inorganic pigment layer 11 due to the difference in thermal expansion coefficient between the heat-resistant resin layer 12 and the inorganic pigment layer 11.

  On the heat-resistant resin layer 12, a stain prevention layer 13 is provided. In the present invention, the antifouling layer 13 contains a modified silicone resin. The antifouling layer 13 of this embodiment is formed from a modified silicone resin. Examples of the modified silicone resin include ester-modified silicone resins, epoxy-modified silicone resins, alkyd-modified silicone resins, and acrylic-modified silicone resins. In particular, an ester-modified silicone resin having excellent oil repellency is preferably used. Resin may be used by 1 type and may be used in mixture of 2 or more types. Further, a resin other than the modified silicone resin may be mixed and used.

  Specific product names of the modified silicone resins include KR5230, KR5234, KR5235, KR400, KR500, KR510, KR213, ES1001N, ES1002T, KR5206, KR9706, X-40-2308, and X-40-9238 (all Shinetsu) Chemical Industry Co., Ltd.).

  The antifouling layer 13 preferably contains scaly metal powder. By including the scale-like metal powder, it is possible to more reliably suppress the soup from simmering in the heat-resistant resin layer 12 and the inorganic pigment layer 11. This seems to be due to the scaly metal powder being oriented in the surface direction in the antifouling layer 13 and more effectively blocking the intrusion of the broth or the like. The content of the scaly metal powder in the antifouling layer 13 is preferably in the range of 10 to 30% by mass, and more preferably in the range of 13 to 25% by mass. When there is too little content, the shielding effect by containing a scale-like metal powder may not fully be acquired. When there is too much content, the space | gap may increase in the stain | pollution | contamination prevention layer 13, and a shielding effect may not fully be acquired.

  Examples of the scaly metal powder include stainless steel powder and aluminum powder.

The particle size of the flaky metal powder (particle size in a direction perpendicular to the thickness direction) _is preferably in the range of 20~40μm at _{D 50,} and even more preferably within the range of 25～35Myuemu. If the particle size of the scaly metal powder is too small, there may be a case where the effect of suppressing the soaking of the broth or the like into the heat resistant resin layer 12 and the inorganic pigment layer 11 may not be sufficiently obtained. In addition, if the particle size of the scaly metal powder is too large, the dirt prevention layer 13 has a large gap, and the effect of suppressing the soaking of juice or the like into the heat resistant resin layer 12 and the inorganic pigment layer 11 cannot be obtained sufficiently. There is a case.

  The thickness of the antifouling layer 13 is preferably in the range of 1 to 20 μm, more preferably in the range of 5 to 18 μm, and particularly preferably in the range of 10 to 15 μm. If the thickness of the stain prevention layer 13 is too thin, the effect of preventing the intrusion of boiled juice may not be sufficiently obtained. If the thickness is too thick, the difference in thermal expansion coefficient between the stain prevention layer 13 and the heat-resistant resin layer 12 may be obtained. As a result, the dirt prevention layer 13 may be peeled off from the heat resistant resin layer 12.

  In this embodiment, since the antifouling layer 13 is provided on the heat resistant resin layer 12, it prevents the broth or the like received by the tray 21 from entering the heat resistant resin layer 12 and the inorganic pigment layer 11. be able to.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to a following example.

<Preparation of cooktop plate>
(Example 1)
A cooker top plate 1 was produced in the same manner as in the first embodiment shown in FIG. As the glass plate 10, a product name “Neoceram N-0” manufactured by Nippon Electric Glass Co., Ltd. was used. As a pigment used for the inorganic pigment layer 11, Fe-Co-Cr system was used. As the glass powder used for forming the inorganic pigment layer 11, B ₂ O ₃ —SiO ₂ glass (manufactured by Nippon Electric Glass Co., Ltd., trade name “NPF”) was used. As the resin binder, a silicone resin (trade name “Panel Clear” manufactured by Daishin Paint Co., Ltd.) was used. This silicone resin contains 50% by mass of a solvent. The pigment, glass powder, and silicone resin were mixed at a mass ratio (pigment: glass powder: silicone resin (including solvent)) of 70: 30: 100 to prepare a paste. This paste was printed on the back surface 10b of the glass plate 10 using a screen printing method, then dried and baked at a temperature of 830 ° C., whereby the inorganic pigment layer 11 was formed. The thickness of the inorganic pigment layer 11 was 7 μm.

  Next, the heat resistant resin layer 12 was formed using the same pigment as the pigment used for the inorganic pigment layer 11 and the silicone resin. The pigment and the silicone resin were mixed at a mass ratio (pigment: silicone resin (including solvent)) of 45:55 to prepare a paste. Using this paste, after printing on the inorganic pigment layer 11 by the screen printing method, it dried and the heat-resistant resin layer 12 was formed. The thickness of the heat resistant resin layer 12 was 9 μm.

  Next, the antifouling layer 13 was formed on the heat resistant resin layer 12. The antifouling layer 13 was formed using an ester-modified silicone resin (trade name “KR5234” manufactured by Shin-Etsu Chemical Co., Ltd.). Specifically, the ester-modified silicone resin was used to print on the heat-resistant resin layer 12 by a screen printing method, and then dried to form the anti-stain layer 13. The thickness of the antifouling layer 13 was 12 μm.

  As described above, the cooker top plate 1 of Example 1 was produced.

(Example 2)
A top plate for a cooker was produced in the same manner as in Example 1 except that the stain prevention layer 13 was formed from an ester-modified silicone resin containing 10% by mass of scaly aluminum powder. Specifically, the scaly aluminum powder and the ester-modified silicone resin are mixed at a mass ratio (scalar aluminum powder: ester-modified silicone resin (including solvent)) so that the ratio is 10:90. A paste was prepared. Using this paste, after printing on the heat-resistant resin layer 12 by the screen printing method, it was dried to form the anti-stain layer 13. The thickness of the antifouling layer 13 was 12 μm.

(Example 3)
A top plate for a cooker was produced in the same manner as in Example 1 except that the antifouling layer 13 was formed from an ester-modified silicone resin containing 10% by mass of scaly stainless powder. Specifically, the scaly stainless powder and the ester-modified silicone resin are mixed in a mass ratio (flaky stainless powder: ester-modified silicone resin (including solvent)) so that the ratio is 10:90. A paste was prepared. Using this paste, after printing on the heat-resistant resin layer 12 by the screen printing method, it was dried to form the anti-stain layer 13. The thickness of the antifouling layer 13 was 12 μm.

Example 4
A top plate for a cooker was produced in the same manner as in Example 1 except that the antifouling layer 13 was formed from an ester-modified silicone resin containing 20% by mass of scaly stainless powder. Specifically, the scaly stainless powder and the ester-modified silicone resin are mixed in a mass ratio (flaky stainless powder: ester-modified silicone resin (including solvent)) so that the ratio is 20:80, A paste was prepared. Using this paste, after printing on the heat-resistant resin layer 12 by the screen printing method, it was dried to form the anti-stain layer 13. The thickness of the antifouling layer 13 was 12 μm.

(Comparative Example 1)
A top plate for a cooker was produced in the same manner as in Example 1 except that the antifouling layer 13 was not formed.

<Evaluation of dirt prevention>
As a sample of the soup, a mixture of soy sauce: salad oil: sugar at a volume ratio of 1: 1: 1 was prepared. A sample of this soup is placed on the outermost layer (stain prevention layer 13 for Examples 1 to 4 and heat-resistant resin layer 12 for Comparative Example 1) on the back surface of the top plate for cooking devices of Examples 1 to 4 and Comparative Example 1. Then, 2 ml was dropped and applied so as to be uniform within a range of 30 mm × 80 mm. Then, after putting the top plate for cookers into the electric furnace and heating at 240 degreeC for 1 hour, it took out and cooled. The taken-out cooking device top plate was visually observed from the cooking surface side to determine whether or not dirt was observed. The application of the sample of the broth and the subsequent heating test were repeated as one set, and the number of times until the soil was recognized was determined. As a result, Example 1 was 3 times, Example 2 was 4 times, Example 3 was 4 times, Example 4 was 5 times, and Comparative Example 1 was 1 time.

  As is clear from the above results, Examples 1 to 4 in which the antifouling layer was formed on the heat resistant resin layer according to the present invention were compared with Comparative Example 1 in which the antifouling layer was not formed. It can be seen that it is possible to effectively prevent the soup from simmering in the juice. Further, as is clear from the comparison between Example 1 and Examples 2 to 4, it can be seen that the effect of preventing dirt can be further improved by adding the scale-like metal powder to the dirt preventing layer.

DESCRIPTION OF SYMBOLS 1 ... Top plate 10 for cookers ... Glass plate 10a ... Cooking surface 10b ... Back surface 11 ... Inorganic pigment layer 12 ... Heat-resistant resin layer 13 ... Antifouling layer 14 ... Opening 20 ... Gas burner part 21 ... Saucepan

Claims (5)

A top plate for a cooker in which an opening is formed,
A glass plate,
An inorganic pigment layer provided on the glass plate;
A heat-resistant resin layer provided on the inorganic pigment layer;
A top plate for a cooking device, comprising: a stain prevention layer containing a modified silicone resin provided on the heat resistant resin layer.   The top plate for a cooking appliance according to claim 1, wherein the antifouling layer contains scaly metal powder.   The top plate for a cooking appliance according to claim 1 or 2, wherein the inorganic pigment layer includes a pigment and glass.   The top plate for a cooker according to any one of claims 1 to 3, wherein the heat-resistant resin layer includes a silicone resin.   The top plate for a cooker according to any one of claims 1 to 4, wherein the opening is an opening through which a gas burner is passed.

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