CN110664217A - Temperature sensing pot that discolours - Google Patents
Temperature sensing pot that discolours Download PDFInfo
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- CN110664217A CN110664217A CN201810719844.XA CN201810719844A CN110664217A CN 110664217 A CN110664217 A CN 110664217A CN 201810719844 A CN201810719844 A CN 201810719844A CN 110664217 A CN110664217 A CN 110664217A
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- color
- pot
- thermochromic
- changing
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Cookers (AREA)
Abstract
The invention relates to the field of cooking utensils, in particular to a temperature-sensing color-changing pot. This temperature sensing pot that discolours includes: a heated substrate (4); and a color-changing coating layer (2) formed on the inner surface of the substrate (4), wherein particles (2.1) with high iron content are dispersed in the color-changing coating layer (2), and the content of iron element in the particles (2.1) with high iron content is 40-75 wt%. The temperature sensing color changing pot can achieve a good temperature indicating effect.
Description
Technical Field
The invention relates to the field of cooking utensils, in particular to a temperature-sensing color-changing pot.
Background
During the hot pot before culinary art food, because of the user to the temperature judgement inaccurate, can't confirm the time point that the oil drain cooks, if the temperature is low excessively, the culinary art effect is not good, if the high oil drain of temperature cooks, can produce very big oil smoke in the pot, be unfavorable for healthily, and increased the clean degree of difficulty in kitchen.
The existing solution is that a temperature sensing coating is formed at the bottom of the pot, and the temperature sensing coating is heated to display temperature change, so that the temperature can be prompted. However, the color difference between the color changing patterns in the existing temperature sensing color changing pot is not obvious, so that a good temperature indicating function cannot be achieved, and a user cannot conveniently and accurately control the oil temperature.
Disclosure of Invention
The invention aims to overcome the defect that the existing temperature sensing color changing pot cannot achieve a better temperature indicating effect, and provides the temperature sensing color changing pot with a better temperature indicating effect.
In the production process of the thermochromic pot, the color-changing coating is usually formed by using a paint containing fluororesin and iron oxide powder. The coating material generally requires a ready-to-use formulation, and it is generally desirable that the iron oxide powder be well dispersed in the fluororesin to form a uniformly dispersed coating material during the formulation of the coating material. However, when the dispersing agent and the component ratios used in the preparation process are changed, the dispersibility of the iron oxide powder is affected, so that the iron oxide powder is aggregated to form particles with high iron content (the iron element content is usually in the range of 40-75 wt%), which is to be avoided in the conventional process. However, the present inventors have unexpectedly found that by dispersing the above-mentioned particles having a high iron content in a coating material for forming a color-changing coating layer, the color pattern of the color-changing coating layer is more remarkably changed during a temperature change process of the color-changing coating layer thus formed, and a better temperature indicating effect can be obtained, thereby completing the present invention.
Therefore, the present invention provides a thermochromic pot, comprising:
a heated substrate; and
a color-changing coating layer formed on the inner surface of the substrate, wherein the color-changing coating layer has dispersed therein particles having a high iron content, and the content of an iron element in the particles having a high iron content is 40 to 75% by weight.
Preferably, the particle size of the high iron content particles is 5-25 μm.
Preferably, the coating material for forming the color-changing coating layer is formulated by mixing fluororesin and iron oxide powder in the presence of a dispersant.
More preferably, the fluororesin is used in an amount of 25 to 80 wt%, the iron oxide powder is used in an amount of 20 to 75 wt%, and the dispersant is used in an amount of 1 to 5 wt%, based on the total weight of the fluororesin and the iron oxide powder.
Preferably, the thickness of the color-changing coating layer is 8 to 30 μm.
Preferably, a primer layer is further formed on the inner surface of the substrate, and the primer layer is formed on the same surface as the color-changing coating layer in parallel, or the color-changing coating layer is formed on the upper surface of the primer layer.
More preferably, the undercoat layer contains silicon carbide wear resistant particles.
More preferably, the silicon carbide wear resistant particles have a particle size of 5-35 μm.
Preferably, the thickness of the primer layer is 10 to 60 μm.
Preferably, the innermost side of the thermochromic pot is formed with a transparent top coat layer.
More preferably, the transparent top coat layer has a thickness of 5 to 30 μm.
In the temperature sensing color changing pot, the particles with high iron content are introduced into the color changing coating, so that the color pattern of the color changing coating is more obvious, and a better temperature indication effect can be achieved.
Drawings
Fig. 1 is a schematic view of a layer structure of a thermochromic pot according to the present invention.
FIG. 2 is a scanning electron microscope image of the coating in the thermochromic pot according to the present invention.
Fig. 3 is a metallographic picture of a coating layer in the thermochromic pot according to the present invention.
Description of the reference numerals
1 transparent Top coat 2 color changing coating
3 base coat 4 substrate
2.1 high iron content particles 2.2 coatings with variable colour
3.1 silicon carbide wear resistant particles
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In the present invention, the use of directional terms such as "upper" and "lower" generally means upper and lower as illustrated with reference to the accompanying drawings, unless otherwise specified; "inner and outer" refer to the inner and outer relative to the profile of the components themselves.
As shown in fig. 1 to 3, the thermochromic pot of the present invention comprises:
a heated substrate 4; and
a color-changing coating layer 2 formed on the inner surface of the substrate 4, wherein particles 2.1 with a high iron content are dispersed in the color-changing coating layer 2.
In the present invention, the content of the iron element in the high iron content particles 2.1 may be 40 to 75% by weight, specifically, for example, 40% by weight, 45% by weight, 50% by weight, 55% by weight, 60% by weight, 65% by weight, 70% by weight, 75% by weight, or any value in the range of at least two of these points.
In the present invention, the particle diameter of the high iron content particles 2.1 may be 5 to 25 μm, specifically, for example, may be any value in the range of 5 μm, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25 μm, and at least two of these values.
In the present invention, the coating material for forming the discoloration coating 2 is prepared by formulating a fluororesin and an iron oxide powder in the presence of a dispersant. In the process of formulating the coating, the fluororesin may be used in an amount of 25 to 80% by weight, the iron oxide powder may be used in an amount of 20 to 75% by weight, and the dispersant may be used in an amount of 1 to 5% by weight, based on the total weight of the fluororesin and the iron oxide powder.
In the present invention, the fluororesin may be conventionally selected in the art, and for example, may be at least one of PFA, PTFE, and FEP, and is preferably FEP.
In the present invention, the dispersant may be at least one of TX-100, TMN-6, TMN-10 and TX-10, preferably TMN-10, which may be available from DOW under the brand name TERGITOLTMTMN-10 dispersant.
In the present invention, the thickness of the discoloration coating 2 may be 8 to 30 μm, and specifically, may be any value in the range of, for example, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25 μm, 28 μm, 30 μm, and at least two of these points.
In the thermochromic pot of the present invention, a primer layer 3 is further formed on the inner surface of the base 4. The base coat 3 and the color-changing coat 2 are arranged together, the colors of the two are contrasted, and when the color of the color-changing coat 2 is changed, a good temperature indicating effect can be achieved. In one embodiment, at normal temperature, the base coat layer 3 is dark red, and the pattern of the color-changing coat layer 2 is light red; in the process that the temperature sensing color changing pot is heated, the color of the color changing coating 2 gradually changes from light to dark until the color of the color changing coating 2 and the color of the bottom coating 3 are the same, and the pattern of the color changing coating 2 disappears to show that the target temperature is reached.
In one embodiment, the primer layer 3 is formed on the same surface as the color-changing coating layer 2 in parallel. In this embodiment, both the primer layer 3 and the color-changing coating layer 2 are formed directly on the inner surface of the substrate 4. The base coat 3 and the color-changing coat 2 may be in contact with each other or may be separated from each other.
In another embodiment, the color-changing coating layer 2 is formed on the upper surface of the base coating layer 3. In this embodiment, the primer layer 3 is directly formed on the inner surface of the substrate 4, and the color-changing coating layer 2 is formed on the upper surface of the primer layer 3. The color-changing layer 2 can be a pattern formed at the central part of the pot body or a pattern formed around the central part of the pot body.
Preferably, the base coat 3 contains silicon carbide wear resistant particles 3.1, which act as a protective coating. The particle diameter of the silicon carbide abrasive particles 3.1 may be 5 to 35 μm, and specifically, may be any value in the range of, for example, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, and at least two of these point values. The particle size of the silicon carbide wear resistant particles 3.1 is preferably smaller than the thickness of the primer layer 3.
In the present invention, the thickness of the undercoat layer 3 may be 10 to 60 μm, and specifically, may be any value in the range of, for example, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, and at least two of these points.
In the temperature sensing color changing pot, a transparent surface coating 1 is formed on the innermost side of the temperature sensing color changing pot. The clear top coat layer 1 completely covers the inner surfaces of the color shifting coating 2, the base coat layer 3 and the substrate 4. The transparent top coat 1 may be formed of a heat resistant, transparent material conventional in the art, such as polytetrafluoroethylene.
In the present invention, the thickness of the transparent top coat layer 1 may be 5 to 30 μm, and specifically, may be any value in the range of, for example, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, and at least two of these values.
The present invention will be described in detail below by way of examples.
In the following examples, the fluororesin used was FEP, available from 3M company under the designation 6300 GZ;
the iron oxide powder used had an average particle size of 1 micron, available from bayer corporation under the designation 4130;
the dispersant used was TMN-10 available from DOW under the designation TERGITOLTMTMN-10。
Example 1
(1) Paint for preparing color-changing coating
50% by weight of fluororesin, 20% by weight of iron oxide powder, 3% by weight of dispersant, and the balance of deionized water and an appropriate amount of thickener were mixed with stirring to obtain a coating material C1, the coating layer obtained from the coating material contained particles having a high iron content, and the iron element content in the particles was about 40% by weight.
(2) Preparation thermochromic pot
The thermochromic pot a1 was obtained by spraying a primer layer on the entire inner surface of the pot body, then spraying a paint C1 on the center portion of the primer layer to form a pattern of a circular color-changing coating layer on the center portion of the primer layer, and then spraying a transparent top coat layer to cover the color-changing coating layer and the primer layer, wherein the thickness of the primer layer was 15 μm, the thickness of the color-changing coating layer was 10 μm, and the thickness of the transparent top coat layer was 10 μm.
The scanning electron microscope picture of the coating of the thermochromic pot is shown in figure 1, and the metallographic picture of the coating is shown in figure 2. As can be seen from fig. 2 and 3, the discoloring coating 2 has dispersed therein particles 2.1 (particle size of 5 μm) having a high iron content and the discoloring coating paint 2.2, and the undercoat 3 has dispersed therein silicon carbide abrasion resistant particles 3.1 (particle size of 15 to 20 μm).
Example 2
(1) Paint for preparing color-changing coating
Stirring and mixing 45 weight percent of fluororesin, 25 weight percent of iron oxide powder, 3 weight percent of dispersant, the balance of deionized water and a proper amount of thickener to obtain a coating C2, wherein the coating contains particles with high iron content, and the content of iron element in the particles is about 50 weight percent.
(2) Preparation thermochromic pot
The thermochromic pot a2 was obtained by spraying a primer layer on the entire inner surface of the pot body, then spraying a paint C2 on the center portion of the primer layer to form a pattern of a circular color-changing coating layer on the center portion of the primer layer, and then spraying a transparent top coat layer to cover the color-changing coating layer and the primer layer, wherein the thickness of the primer layer was 15 μm, the thickness of the color-changing coating layer was 15 μm, and the thickness of the transparent top coat layer was 10 μm.
Example 3
(1) Paint for preparing color-changing coating
40% by weight of fluororesin, 30% by weight of iron oxide powder, 2% by weight of TMN-10 dispersant, 1% TX-100 and the balance of deionized water and a proper amount of thickener were stirred and mixed to obtain a coating C3, which contains particles with a high iron content, wherein the iron element content in the particles is about 60% by weight.
(2) Preparation thermochromic pot
The thermochromic pot A3 was obtained by spraying a primer layer on the entire inner surface of the pot body, then spraying a paint C3 on the center portion of the primer layer to form a pattern of a circular color-changing coating layer on the center portion of the primer layer, and then spraying a transparent top coat layer to cover the color-changing coating layer and the primer layer, wherein the thickness of the primer layer was 15 μm, the thickness of the color-changing coating layer was 12 μm, and the thickness of the transparent top coat layer was 10 μm.
Comparative example 1
The thermochromic pot was prepared according to the method of example 1, except that the process of preparing the paint of the color-changing coating in step (1) was: 50 parts by weight of a fluororesin, 20 parts by weight of an iron oxide powder and 3 parts by weight of a dispersant (available from DOW corporation under the trade name TX-100) were mixed with stirring to obtain a coating material in which particles having a high iron content were substantially not contained, thereby obtaining a thermochromic pot D1.
Test example
The thermochromic pots prepared in examples 1 to 3 and comparative example 1 were respectively placed on a stove and heated, and the color change of the inner coating of the thermochromic pots was observed, with the results shown in table 1 below.
TABLE 1
As can be seen from the results in Table 1, the thermochromic pot provided by the invention can achieve a good temperature indicating effect.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (11)
1. The utility model provides a pot discolours of temperature sensing, its characterized in that, this pot of discolouring of temperature sensing includes:
a heated substrate (4); and
a color-changing coating layer (2) formed on the inner surface of the substrate (4), wherein the color-changing coating layer (2) has dispersed therein particles (2.1) having a high iron content, and the content of an iron element in the particles (2.1) having a high iron content is 40 to 75% by weight.
2. Thermochromic pot according to claim 1, characterised in that the particles (2.1) with a high iron content have a particle size of 5-25 μm.
3. The thermochromic pot according to claim 1 or 2, wherein the paint for forming the color-changing coating (2) is prepared by formulating a fluororesin and an iron oxide powder in the presence of a dispersant.
4. The thermochromic pot of claim 3, wherein the fluororesin is used in an amount of 25 to 80 wt%, the iron oxide powder is used in an amount of 20 to 75 wt%, and the dispersant is used in an amount of 1 to 5 wt%, based on the total weight of the fluororesin and the iron oxide powder.
5. The thermochromic pot according to claim 1 or 2, wherein the thickness of the color change coating (2) is 8-30 μm.
6. The thermochromic pot according to claim 1 or 2, wherein a primer coat (3) is further formed on the inner surface of the base (4), and the primer coat (3) and the color change coat (2) are formed side by side on the same surface, or the color change coat (2) is formed on the upper surface of the primer coat (3).
7. Thermochromic pot according to claim 6, characterised in that the base coating (3) contains wear resistant particles (3.1) of silicon carbide.
8. The thermochromic pot according to claim 7, wherein the silicon carbide wear-resistant particles (3.1) have a particle size of 5 to 35 μm.
9. The thermochromic pot according to claim 6, wherein the thickness of the base coat (3) is 10-60 μm.
10. The thermochromic pot according to claim 1 or 2, wherein the innermost side of the thermochromic pot is formed with a transparent top coat layer (1).
11. Thermochromic pot according to claim 10, characterised in that the thickness of the transparent top coat (1) is 5-30 μm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310043234.3A CN116115058B (en) | 2018-07-03 | 2018-07-03 | Thermochromic pot |
| CN201810719844.XA CN110664217B (en) | 2018-07-03 | 2018-07-03 | Temperature sensing pot that discolours |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810719844.XA CN110664217B (en) | 2018-07-03 | 2018-07-03 | Temperature sensing pot that discolours |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310043234.3A Division CN116115058B (en) | 2018-07-03 | 2018-07-03 | Thermochromic pot |
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| CN110664217A true CN110664217A (en) | 2020-01-10 |
| CN110664217B CN110664217B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810719844.XA Active CN110664217B (en) | 2018-07-03 | 2018-07-03 | Temperature sensing pot that discolours |
| CN202310043234.3A Active CN116115058B (en) | 2018-07-03 | 2018-07-03 | Thermochromic pot |
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| CN202310043234.3A Active CN116115058B (en) | 2018-07-03 | 2018-07-03 | Thermochromic pot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116115058A (en) * | 2018-07-03 | 2023-05-16 | 佛山市顺德区美的电热电器制造有限公司 | Thermochromic pot |
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| FR2971687B1 (en) * | 2011-02-18 | 2016-03-25 | Seb Sa | HEATING ARTICLE COMPRISING ANTI-ADHESIVE COATING WITH THREE-DIMENSIONAL DECORATION |
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| FR3014890B1 (en) * | 2013-12-12 | 2017-02-03 | Seb Sa | CULINARY ARTICLE HAVING A HYBRID COATING AND METHOD FOR REALIZING SUCH A ARTICLE |
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| CN110664217B (en) * | 2018-07-03 | 2023-03-14 | 佛山市顺德区美的电热电器制造有限公司 | Temperature sensing pot that discolours |
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- 2018-07-03 CN CN202310043234.3A patent/CN116115058B/en active Active
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| GB1495687A (en) * | 1974-09-27 | 1977-12-21 | Du Pont | Process for decorating heatstable polymer coating compositions |
| US20130014690A1 (en) * | 2010-03-31 | 2013-01-17 | Nichiyu Giken Kogyo Co., Ltd. | Temperature management indicator and structure having the same attached |
| CN102993854A (en) * | 2011-09-09 | 2013-03-27 | 杜邦公司 | Coating composition used for non-stick coating and coating base material comprising patterns made from coating composition |
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| CN116115058B (en) * | 2018-07-03 | 2024-08-13 | 佛山市顺德区美的电热电器制造有限公司 | Thermochromic pot |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116115058B (en) | 2024-08-13 |
| CN116115058A (en) | 2023-05-16 |
| CN110664217B (en) | 2023-03-14 |
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