CN115517536A - Composite material for non-stick cookware, non-stick cookware and manufacturing method thereof - Google Patents
Composite material for non-stick cookware, non-stick cookware and manufacturing method thereof Download PDFInfo
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- CN115517536A CN115517536A CN202211230865.8A CN202211230865A CN115517536A CN 115517536 A CN115517536 A CN 115517536A CN 202211230865 A CN202211230865 A CN 202211230865A CN 115517536 A CN115517536 A CN 115517536A
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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
- A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
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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
- 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
- A47J36/025—Vessels with non-stick features, e.g. coatings
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Abstract
The invention provides a composite material for a non-stick cooker, the non-stick cooker and a manufacturing method thereof. The composite material comprises, based on the total weight of the composite material: 50 to 80wt% of a perovskite material and 20 to 50wt% of a ductile metallic material, wherein the perovskite material is formed from ABO 3 It is indicated that a comprises at least one of an alkaline earth metal, B comprises at least one of a transition metal, and wherein the ductile metallic material has an elongation at break of greater than or equal to 12%. Therefore, the non-stick cooker comprising the non-stick coating comprising the composite material realizes the effects of stable material quality, high hardness, high temperature resistance, long non-stick service life and the like.
Description
Technical Field
The present invention relates to a composite material for non-stick cookware and a method of manufacturing the same, and more particularly, to a composite material comprising a perovskite material and a ductile metal material and a non-stick cookware and a method of manufacturing the same.
Background
The non-stick cookware used for cooking food at present mainly plays a non-stick role by spraying a layer of fluororesin as a non-stick coating on the surface of a metal substrate. However, the current non-stick cookware made of fluororesin has the problems of short non-stick life and the like, and is mainly embodied in the following aspects:
1. is easy to be worn and scratched: the fluororesin high polymer material has the characteristics of low hardness and no wear loss. When hard foods (e.g., shells, bones, etc.) are stir-fried using a non-stick cooker made of fluororesin or when foods are stir-fried using a metal spatula, the non-stick coating of the non-stick cooker is easily scratched, fluffed, and the non-stick property of the non-stick cooker is deteriorated.
2. No high temperature aging resistance: when the fluororesin coating is used at a high temperature exceeding 260 ℃ for a long period of time, problems such as aging and yellowing are likely to occur. However, when the nonstick cooker is used for cooking dishes in daily life, dry burning is inevitable, so that the problems of short service life of the fluororesin nonstick coating and the like are caused.
Therefore, a brand new non-stick coating material needs to be developed to solve the problems of non-wear resistance, non-scratch resistance and short service life of the non-stick cooker.
Disclosure of Invention
The present invention is conceived to solve the aforementioned technical problems in the related art. Therefore, the invention aims to provide a composite material for non-stick cookers, the non-stick cookers and a manufacturing method thereof, so as to realize the non-stick cookers with excellent characteristics of wear resistance, scratch resistance, long service life and the like.
According to one aspect of the present invention there is provided a composite material for non-stick cookware, the composite material comprising, based on the total weight of the composite material: 50 to 80wt% of a perovskite material and 20 to 50wt% of a ductile metal material, wherein the perovskite material is formed of ABO 3 Wherein A comprises at least one of an alkaline earth metal and B comprises at least one of a transition metal, and wherein the ductile metallic material has an elongation at break of 12% or more. By including a predetermined weight of perovskite material and ductile metal material, the composite material may have high hardness and high stability, thereby achieving good non-tackiness.
In an embodiment of the present invention, a may be Ca and B may be Ti. By including the predetermined perovskite material, the composite material may have high hardness, high stability, and good high temperature resistance, among other properties.
In embodiments of the present invention, the ductile metallic material may comprise Fe, al, cu, ni, or alloys thereof. By using a predetermined ductile metal material, the hardness of the composite material can be improved.
In embodiments of the invention, the perovskite material and the ductile metal material may each have an average particle size of 10 μm to 100 μm. By controlling the particle size of the perovskite material and the ductile metal material, the composite material can have the properties of high hardness, high stability and the like.
According to another aspect of the present invention, there is provided a non-stick cookware comprising: a substrate including an inner surface for carrying an article and an outer surface facing away from the inner surface; and a non-stick coating disposed on an inner surface of the substrate and comprising the composite material described above. The non-stick cooker has the characteristics of high hardness, high wear resistance, long service life and the like, and achieves the durable non-stick using effect.
In embodiments of the present invention, the non-stick coating may have a thickness of 20 μm to 100 μm. By controlling the thickness of the non-stick coating, the non-stick cookware can have high hardness, high stability and the like.
According to another aspect of the present invention there is provided a method of manufacturing a non-stick cookware, the method comprising the steps of: preparing the composite material; and spraying the composite material on the substrate of the non-stick cooker by plasma spraying to form the non-stick coating. The non-stick cookware obtained by this method with the use of the above-mentioned composite material has high stability, high hardness and improved lifetime.
In an embodiment of the present invention, the plasma spraying may be performed under the following conditions: the flow rate of the main gas is 1500L/H to 2000L/H, the flow rate of the hydrogen is 80L/H to 120L/H, the voltage is 40V to 60V, the current is 450A to 550A, and the feeding rate of the composite material is 30g/min to 70g/min. By controlling the plasma spraying conditions, the process efficiency can be improved, and the process cost can be reduced.
In embodiments of the invention, the diameter of the tip used for plasma spraying may be 3mm to 7mm and the distance of the tip from the base of the non-stick cookware may be 80mm to 130mm. By controlling the plasma spraying conditions, the process efficiency can be improved, and the process cost can be reduced.
In an embodiment of the invention, the method may further comprise sanding the non-stick coating. By reasonably selecting the process steps for preparing the non-stick cooker, the process efficiency can be improved, and the process cost can be reduced.
According to embodiments of the present invention, a composite material for non-stick cookware is provided, as well as non-stick cookware and methods of making the same. The non-stick cooker comprises a composite material containing a perovskite material and a tough metal material, so that the non-stick cooker has the performances of high hardness, high wear resistance, high temperature resistance, improved service life and the like, and realizes a non-stick effect.
Drawings
The above and/or other features and aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic view of a non-stick cookware according to an embodiment of the present invention.
FIG. 2 is a flow chart of a method of manufacturing a non-stick cookware according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below. While exemplary embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As mentioned previously, the non-stick coatings included in non-stick cookware in the prior art have more or less functional drawbacks, and the present invention therefore proposes a composite material for non-stick coatings with more optimal properties.
In the embodiment of the invention, in order to solve the problems of low hardness, poor wear resistance, poor scratch resistance and the like of the fluorine resin in the field of composite materials for non-stick cookers, the composite material comprising perovskite material and tough metal material is innovatively adopted to prepare the non-stick cooker, so that the toughness of the composite material is improved, and the non-stick effect, wear resistance and scratch resistance of the non-stick cooker are improved.
In embodiments of the invention, the composite material for the non-stick cookware may include a perovskite material and a ductile metal material. In particular, the composite material for non-stick cookware may include 50 to 80wt% of a perovskite material and 20 to 50wt% of a ductile metal material, based on the total weight of the composite material.
In embodiments of the invention, the perovskite material may be formed of ABO 3 It is noted that a may comprise at least one of the alkaline earth metals and B may comprise at least one of the transition metals. In the examples, A is Ca and B is Ti. Perovskite materials (in particular, calcium titanate ceramic materials) have particular properties. In particular, the perovskite material may have a typical ABX 3 A crystal structure. Calcium titanate 113, as representative of perovskite materials, may have a large number of oxygen vacancies and crystal defects in its structure. ABX in perovskite materials 3 In the crystal structure, the A site can be Ca metal cations, the B site can be Ti metal cations, and when the crystal structure is heated, the metal cations at the A site and the B site can be displaced to cause lattice distortion, so that the symmetry and the order of the crystal structure are reduced, the surface energy is reduced, and a certain non-stick effect is shown. In detail, calcium titanate is currently commonly used in the photovoltaic industry as the most typical representative of perovskite materials, and has excellent photoelectric conversion efficiency. The calcium titanate belongs to a cubic crystal system, and because calcium titanate crystals can easily pass through TiO 6 The calcium titanate often undergoes phase transition between cubic, tetragonal and orthorhombic systems because the crystal lattice is distorted by rotation or displacement of cations, thereby reducing the symmetry of the crystal structure. During lattice distortion of calcium titanate, the order of the crystal structure of the material decreases and the surface free energy decreases, so that calcium titanate may exhibit some non-tackiness, and the magnitude of the non-tackiness may be related to the degree of lattice distortion of the calcium titanate. Thus, the perovskite material may be used as a composite material for non-stick cookware. The perovskite material and the ductile metal material are mixed to prepare the composite material, so that the problem of insufficient toughness of the perovskite material can be further solved, and the non-stickiness of the composite material is further improved.
In embodiments of the invention, the weight of the perovskite material may be from 50wt% to 80wt%, based on the total weight of the composite. Here, it is mainly considered that, when the weight of the perovskite material is less than 50wt%, the non-stick effect of the non-stick coating prepared from the composite material including the perovskite material is insignificant; when the weight of the perovskite material is higher than 80wt%, the non-stick coating prepared from the composite material comprising the perovskite material is too brittle, and the problem that the non-stick coating is easy to collapse due to heat stress accumulation and the like in the spraying process is easy to occur. Specifically, in embodiments of the invention, the weight of the perovskite material may be 50wt% to 75wt%, 55wt% to 80wt%, 60wt% to 80wt%, 70wt% to 80wt%, 60wt% to 75wt%, 62wt% to 75wt%, 65wt% to 78wt%, 70wt% to 75wt%, and the like, based on the total weight of the composite. Specifically, the weight of the perovskite material may be 50wt%, 51wt%, 52wt%, 53wt%, 54wt%, 55wt%, 56wt%, 57wt%, 58wt%, 59wt%, 60wt%, 61wt%, 62wt%, 63wt%, 64wt%, 65wt%, 66wt%, 67wt%, 68wt%, 69wt%, 70wt%, 71wt%, 72wt%, 73wt%, 74wt%, 75wt%, 76wt%, 77wt%, 78wt%, 79wt%, 80wt%, etc., based on the total weight of the composite.
In embodiments of the invention, the weight of the ductile metallic material may be 20wt% to 50wt%, based on the total weight of the composite material. Here, it is primarily considered that when the weight of the ductile metallic material is below 20wt%, the non-stick coating made from the composite material comprising the ductile metallic material is too brittle; when the weight of the ductile metallic material is more than 50wt%, the non-stick effect of the non-stick coating prepared from the composite material including the ductile metallic material is insignificant. Specifically, in embodiments of the present disclosure, the weight of the ductile metal material may be 20wt% to 45wt%, 25wt% to 50wt%, 30wt% to 50wt%, 40wt% to 50wt%, 30wt% to 45wt%, 32wt% to 45wt%, 35wt% to 48wt%, 40wt% to 45wt%, and the like, based on the total weight of the composite material. Specifically, the weight of the ductile metal material may be 20wt%, 21wt%, 22wt%, 23wt%, 24wt%, 25wt%, 26wt%, 27wt%, 28wt%, 29wt%, 30wt%, 31wt%, 32wt%, 33wt%, 34wt%, 35wt%, 36wt%, 37wt%, 38wt%, 39wt%, 40wt%, 41wt%, 42wt%, 43wt%, 44wt%, 45wt%, 46wt%, 47wt%, 48wt%, 49wt%, 50wt%, etc., based on the total weight of the composite.
In embodiments of the present invention, the ductile metal material may have an elongation at break of greater than or equal to about 12% and less than or equal to about 20%. For example, the ductile metallic material may have an elongation at break of greater than or equal to about 13% and less than or equal to about 20%, greater than or equal to about 14% and less than or equal to about 20%, greater than or equal to about 15% and less than or equal to about 20%, greater than or equal to about 16% and less than or equal to about 20%, greater than or equal to about 17% and less than or equal to about 20%, greater than or equal to about 18% and less than or equal to about 20%, greater than or equal to about 19% and less than or equal to about 20%, greater than or equal to about 13% and less than or equal to about 19%, greater than or equal to about 15% and less than or equal to about 19%, greater than or equal to about 17% and less than or equal to about 19%, greater than or equal to about 18% and less than or equal to about 19%, greater than or equal to about 14% and less than or equal to about 18%, greater than or equal to about 15% and less than or equal to about 18%, greater than or equal to about 16% and less than or equal to about 18%, greater than or equal to about 17% and less than or equal to about 18%, greater than or equal to about 13% and less than or equal to about 17%, greater than or equal to about 14% and less than or equal to about 17%, greater than or equal to about 15% and less than or equal to about 17%, greater than or equal to about 13% and less than or equal to about 16%, greater than or equal to about 14% and less than or equal to about 16%, greater than or equal to about 13% and less than or equal to about 15%, greater than or equal to about 14% and less than or equal to about 15%, greater than or equal to about 13% and less than or equal to about 13%, and less than or equal to about 14%, etc. Specifically, the ductile metal material may have an elongation at break of 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, etc.
In embodiments of the present invention, the ductile metallic material may comprise Fe, al, cu, ni, or alloys thereof.
In embodiments of the invention, the perovskite material may have an average particle size of from 10 μm to 100 μm. In particular, the amount of the solvent to be used, the perovskite material may have an average particle size of from 10 μm to 90 μm, from 10 μm to 80 μm, from 10 μm to 70 μm, from 10 μm to 60 μm, from 10 μm to 50 μm, from 10 μm to 40 μm, from 10 μm to 30 μm, from 10 μm to 20 μm, from 20 μm to 90 μm, from 20 μm to 80 μm, from 20 μm to 70 μm, from 20 μm to 60 μm, from 20 μm to 50 μm, from 20 μm to 40 μm, from 20 μm to 30 μm, from 30 μm to 90 μm, from 30 μm to 80 μm 30 μm to 70 μm, 30 μm to 60 μm, 30 μm to 50 μm, 30 μm to 40 μm, 40 μm to 90 μm, 40 μm to 80 μm, 40 μm to 70 μm, 40 μm to 60 μm, 40 μm to 50 μm, 50 μm to 90 μm, 50 μm to 80 μm, 50 μm to 70 μm, 50 μm to 60 μm, 60 μm to 90 μm, 60 μm to 80 μm, 60 μm to 70 μm, 70 μm to 90 μm, 70 μm to 80 μm, 80 μm to 90 μm and the like. Specifically, the perovskite material may have an average particle diameter of 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, or the like.
In embodiments of the invention, the average particle size of the ductile metallic material may be 10 μm to 100 μm. Specifically, the average particle size of the ductile metallic material may be 10 to 90 μm, 10 to 80 μm, 10 to 70 μm, 10 to 60 μm, 10 to 50 μm, 10 to 40 μm, 10 to 30 μm, 10 to 20 μm, 20 to 90 μm, 20 to 80 μm, 20 to 70 μm, 20 to 60 μm, 20 to 50 μm, 20 to 40 μm, 20 to 30 μm, 30 to 90 μm, 30 to 80 μm, 30 to 70 μm, 30 to 60 μm, 30 to 50 μm, 30 to 40 μm, 40 to 90 μm, 40 to 80 μm, 40 to 70 μm, 40 to 60 μm, 40 to 50 μm, 50 to 40 μm, 40 to 90 μm, 40 to 80 μm, 90 to 70 μm, 90 to 90 μm, 50 to 70 μm, 90 to 70 μm, 50 to 70 μm, or the like. Specifically, the average particle diameter of the ductile metallic material may be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, or the like.
In embodiments of the present invention, the thickness of the final formed non-stick coating may be 20 μm to 100 μm. Specifically, the thickness of the non-stick coating ultimately formed may be 20 μm to 90 μm, 20 μm to 80 μm, 20 μm to 70 μm, 20 μm to 60 μm, 20 μm to 50 μm, 20 μm to 40 μm, 20 μm to 30 μm, 30 μm to 90 μm, 30 μm to 80 μm, 30 μm to 70 μm, 30 μm to 60 μm, 30 μm to 50 μm, 30 μm to 40 μm, 40 μm to 90 μm, 40 μm to 80 μm, 40 μm to 70 μm, 40 μm to 60 μm, 40 μm to 50 μm, 50 μm to 90 μm, 50 μm to 70 μm, 50 μm to 60 μm, 60 μm to 90 μm, 60 μm to 80 μm, 60 μm to 70 μm, 70 μm to 90 μm, 70 μm to 80 μm, 90 μm to 90 μm, 90 μm to 80 μm, or the like. Specifically, the thickness of the non-stick coating that is finally formed may be 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, or the like.
The non-stick cookware comprising the above composite will be described in detail below in conjunction with FIG. 1.
FIG. 1 shows a schematic structural view of a non-stick cookware 100 according to an embodiment of the present invention.
As shown in FIG. 1, the non-stick cookware 100 includes a base 120 and a non-stick coating 140 on a surface of the base.
The base 120 can be the body of the non-stick cookware, for example, when the non-stick cookware is a pan, the base can be a pan body. The substrate 120 may be made of any suitable material commonly used in the art. The substrate 120 may include an inner surface for carrying the article and an outer surface facing away from the inner surface.
The non-stick coating 140 may be located on the inner surface of the substrate 120. The non-stick coating 140 may comprise a composite material as described above, such that the non-stick coating 140 may have improved hardness, abrasion resistance, scratch resistance, and lifetime.
It should be understood that the non-stick cookware 100 according to the present invention may also have a common cookware structure such as a cookware handle (e.g., pan handle), with the body portion of the non-stick cookware shown only by way of example in FIG. 1, and other portions not shown.
The non-stick cookware according to the present invention includes a non-stick coating formed by a composite material, such that the non-stick cookware has high hardness, high stability and improved lifetime.
A method of manufacturing a non-stick cookware according to an embodiment of the invention will be described in detail with reference to fig. 2.
FIG. 2 is a flow chart of a method of manufacturing a non-stick cookware according to an embodiment of the present invention.
Referring to fig. 2, a method of manufacturing a non-stick cookware according to an embodiment of the present invention includes preparing a composite material (step S310); spraying the composite material on the base body of the non-stick cooker by using plasma spraying (step S320); and sanding the non-stick coating (step S330).
In step S310, a step of grinding the perovskite material and the ductile metal material is first performed. The perovskite material and the ductile metal material are subjected to a grinding process to obtain a perovskite material powder having an average particle diameter of 10 μm to 100 μm and a ductile metal powder having an average particle diameter of 10 μm to 100 μm. The method of the grinding process may adopt any existing techniques, and the present invention is not limited thereto. Alternatively, perovskite material powder having an average particle diameter of 10 μm to 100 μm and ductile metal powder having an average particle diameter of 10 μm to 100 μm may be directly purchased in a commercially available manner. Then, the perovskite material powder and the ductile metal powder are uniformly mixed in a mass ratio of 4.
In step S320, a spraying step is performed. Specifically, the composite material is first preheated to improve the flowability of the composite material powder and prevent the occurrence of gun clogging and the like in the spraying step. And then, spraying the preheated composite material on the base body of the non-stick cooker by using a plasma spraying process to form a non-stick coating. In the plasma spraying step, the plasma spraying may be performed according to the following parameters: the flow rate of the main gas (specifically, argon gas) supplied is 1500L/H to 2000L/H; the flow rate of the supplied hydrogen is 80L/H to 120L/H; the voltage is 40V to 60V; the current is 450A to 550A; the feeding rate of the composite material is 30g/min to 70g/min; the straight hole of the straight hole gun nozzle is 3mm to 7mm (preferably, 5 mm); and the distance of the gun nozzle from the base body of the non-stick cooker is 80mm to 130mm. Through the above steps, a non-stick cookware having a non-stick coating with a thickness of 20 μm to 100 μm can be prepared.
In step S330, a sanding process is performed. The sanding process may be performed by any known technique, and the invention is not limited thereto.
By coating the composite material on the surface of the non-stick cookware, the finally formed non-stick cookware has improved non-stick property, and achieves the effects of stable material, high hardness, high temperature resistance, long non-stick service life and the like.
The composite material and the method for manufacturing the non-stick cookware according to the present invention will be described in detail with reference to examples and comparative examples.
Example 1
The perovskite material and the ductile metal material are adopted to prepare the composite material for the non-stick cooker. Specifically, calcium titanate material powder having an average particle diameter of 20 μm and FeTi having an average particle diameter of 20 μm were mixed 30 The alloy powders were uniformly mixed in a mass ratio of 4. The composite material is then preheated and plasma sprayed after preheating.
In the step of preparing the pot blank of the non-stick cookware, an aluminum alloy pot blank is used as a spray substrate, and a substrate treatment is performed by a sand blast treatment in which the pot blank is sand blasted with 40 to 60 mesh brown alumina so that the pot blank has a roughness (Rz) of 30 to 50 μm.
In the plasma spraying process, the specific parameters are as follows: the flow rate of argon supply is 1500L/H; the flow rate of the supplied hydrogen is 100L/H; the voltage is 50V; the current is 500A; the feeding rate of the composite material is 30g/min; the diameter of the straight-hole gun nozzle is 5mm; and the distance between the spray gun and the pot blank is 80mm.
The average thickness of the non-stick coating finally formed by the above procedure was 50 μm.
And after the plasma spraying is finished, sanding the formed non-stick coating to obtain the non-stick cooker with a smooth inner surface.
Example 2
The difference from the embodiment 1 is that, 30 the mass ratio of the calcium titanate material powder to the FeTi alloy powder is 2.
Example 3
The difference from the embodiment 1 is that, 30 calcium titanateThe mass ratio of the material powder to the FeTi alloy powder is 1.
Comparative example 1
The composite material for the non-stick cooker is prepared by adopting fluororesin. Specifically, a nonstick cooker was prepared by air spraying and sintering curing using polytetrafluoroethylene as a coating material, wherein the polytetrafluoroethylene was composed of 45wt% of polytetrafluoroethylene resin, 35wt% of water, 5wt% of diethylene glycol ethyl ether, 5wt% of glycerin and 10wt% of polyoxyethylene glycol alkyl ether.
In the air spraying process, the specific parameters are as follows: the spraying distance is 160mm; the air pressure is 0.3MPa; the flow rate was 8L/min.
In the sintering and curing process, the specific parameters are as follows: sintering temperature: keeping the temperature at 420 ℃ for 6min.
The average thickness of the non-stick coating finally formed by the above procedure was 20 μm.
Comparative example 2
The non-stick ceramic material is used for preparing the composite material for the non-stick cooker. Specifically, a non-stick cooker is prepared by adopting non-stick ceramic as a coating material in a manner of air spraying, sintering and curing, wherein the non-stick ceramic comprises 45wt% of polymethylsiloxane, 25wt% of silica sol, 10wt% of butyl acetate, 5wt% of ethanol and 15wt% of deionized water.
In the air spraying process, the specific parameters are as follows: the spraying distance is 160mm; the air pressure is 0.3MPa; the flow rate was 10L/min.
In the sintering and curing process, the specific parameters are as follows: the sintering temperature is 270 ℃ and the temperature is kept for 4min.
The average thickness of the non-stick coating finally formed by the above procedure was 20 μm.
Testing of non-stick cookware Performance
The non-stick effect of the non-stick coatings of the non-stick cookware prepared in examples 1 to 3 and comparative examples 1 and 2 was tested using the accelerated simulation test and the permanent non-stick test. Specifically, the test method is as follows:
(1) Accelerated simulation (non-stick life) test
The non-stick life of the non-stick cookware prepared in examples 1 to 3 and comparative examples 1 and 2 was evaluated with reference to the accelerated simulation test procedure for non-stick frying pans. The test flow is as follows:
the non-stick cookware prepared in examples 1 to 3 and comparative examples 1 and 2 was subjected to a shock abrasion test, a dry-fire mixed sauce test, a boiled salt water test, a roasted quartz stone (shovel) test and a fried egg evaluation non-stick rating test in this order. When all the above test steps are completed, one test cycle is flagged as being ended.
In the shock abrasion resistance testThe specific parameters are as follows:
the instrument comprises the following steps: vibration wear-resistant testing machine.
The test method comprises the following steps: 1) Putting 1Kg of quartz stone (with the particle size of 9mm to 12 mm) into a non-stick cooker; 2) Placing the non-stick cookware on a heating furnace; 3) Setting the vibration time of the instrument to be 15 minutes, the heating temperature to be 150-180 ℃, and the rotating speed to be 300 revolutions per minute; 4) Starting a vibration button to enable the quartz stone to vibrate in the non-stick cooker for 15 minutes; and 5) pouring out the quartz stone in the non-stick cooker after the test is finished, and cleaning and wiping the inner surface of the non-stick cooker by using a detergent.
Replacement cycle of quartz stone: 1 time per month.
In the Dry-burn Mixed sauce testThe specific parameters are as follows:
preparing materials: soy sauce, vinegar, cooking wine, monosodium glutamate, salt, sugar and edible oil.
Test procedure and procedure: 1) Preparing the mixed sauce according to the following weight ratio: the method comprises the following steps of (1) completely dissolving all ingredients in a ratio of (mass ratio) soy sauce to vinegar to cooking wine to monosodium glutamate to salt to sugar to edible oil = 4; 2) Putting 50g of the mixed sauce into a non-stick cooker, and shaking the non-stick cooker until the sauce uniformly covers the bottom of a pan of the non-stick cooker; 3) Placing the non-stick cooker on a gas stove, dry-burning to 250-270 deg.C, keeping the temperature for 2min, and stopping heating; and 4) rinsing the non-stick cookware with water, and then scrubbing the soiled area inside the non-stick cookware with a detergent and rag.
In the salt water cooking testThe specific parameters are as follows:
preparing materials: 50g of table salt and 950g of water.
Test procedure and procedure: 1) Weighing 50g of salt and 950g of water to prepare 5wt% of salt water, and pouring the salt water into the non-stick cooker; 2) Starting timing after the water is boiled, keeping slight boiling for 10min, and adding water according to conditions to keep the concentration unchanged; and 3) after the cooking is finished for a specified time, using tap water to clean and dry the non-stick cooker.
In the parched Quartz stone (shovel) testThe specific parameters are as follows:
preparing materials: 1Kg of quartz stone with a particle size of 9mm to 12mm, oil, vinegar, cooking wine, soy sauce and a little salt.
Test procedure and procedure: 1) Pouring 15g of edible oil into a non-stick cooker, uniformly shaking until the whole inner surface is impregnated, heating until oil smoke is generated, then pouring 1Kg of quartz stone into the non-stick cooker, adding a small amount of vinegar, cooking wine, soy sauce, water and salt, and uniformly stir-frying for 10min; 2) After finishing, cleaning and wiping the inner surface of the non-stick cooker by using the detergent; and 3) filtering the soup after each cycle, and leaving the quartz stone for the next cycle.
Replacement cycle of quartz stone: 1 time/month
In the accelerated simulation test, the non-stick life of the non-stick cookware was judged after the end of each cycle. The end point of the test can be determined when the non-stick cookware has one of the following phenomena: (1) reduction of non-tackiness: the non-stick grade of the fried eggs is continuously classified as grade III for two cycles; and (2) appearance deterioration: the coating has a fluffing phenomenon; the diameter of the coating falling area is more than 3mm 2 (ii) a The abrasion obviously exposes the base material; the coating has puncture type scratches (exposing the base material) of more than 3; or stains that cannot be washed off with a moist wipe.
The number of accelerated simulation test cycles when the record test reaches the end point is the non-stick life of the non-stick cookware, and the more the number of cycles is, the longer the non-stick life of the non-stick coating of the non-stick cookware is. Generally, a cycle number greater than or equal to 3 cycles is acceptable.
(2) Test for permanent tack free
The non-stick cookware prepared in examples 1 to 3 and comparative examples 1 and 2 were evaluated for permanent non-stick, according to the method of the 5.6.9 permanent non-stick test of GB/T32388-2015.
The results of the tests for the non-stick life and the permanent non-stick property of the non-stick cookware prepared in examples 1 to 3 and comparative examples 1 and 2 are shown in table 1.
TABLE 1
| Sample (I) | Non-tackiness | LNE lifetime | Durable non-stick life |
| Comparative example 1 | Ⅰ | 2 | 8000 |
| Comparative example 2 | Ⅰ | 1 | 2000 |
| Example 1 | Ⅰ | 15 | 28000 |
| Examples2 | Ⅱ | 10 | 20000 |
| Example 3 | Ⅱ | 7 | 12000 |
In general, non-stick cookware can be considered to have improved non-stick performance when the non-stick coating has an LNE life of greater than or equal to 5 and a durable non-stick life of greater than or equal to 10000.
As can be seen from the data in table 1, the non-stick coatings of examples 1 to 3 according to the invention have improved non-stick life and permanent non-stick properties compared to comparative examples 1 and 2.
In summary, according to the embodiments of the present invention, since the composite material for the non-stick coating may include the perovskite material and the ductile metal material, the wear resistance, hardness, non-stick life, and durable non-stick property of the non-stick coating may be improved, and the effects of stable material, long non-stick life, and the like may be achieved.
The invention produces a non-stick coating with optimized properties by a rational optimization of the composition of the composite material for the non-stick coating. The non-stick cooker manufactured by using the composite material realizes multiple performances such as shovel resistance, lasting non-stick performance and the like, so that the user experience is greatly improved.
While the present invention has been particularly shown and described with reference to embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims and their equivalents. The embodiments should be considered in descriptive sense only and not for purposes of limitation. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present invention.
Claims (10)
1. A composite material for non-stick cookware, characterized in that it comprises, based on the total weight of the composite material: 50 to 80wt% of a perovskite material and 20 to 50wt% of a ductile metal material,
wherein the perovskite material is formed of ABO 3 Wherein A comprises at least one of alkaline earth metals, B comprises at least one of transition metals,
wherein the ductile metal material has an elongation at break of 12% or more.
2. The composite material of claim 1, wherein a is Ca and B is Ti.
3. The composite material of claim 1, wherein the ductile metallic material comprises Fe, al, cu, ni, or alloys thereof.
4. The composite material according to claim 1, wherein the perovskite material and the ductile metal material each have an average particle size of 10 to 100 μ ι η.
5. A non-stick cookware, characterized in that it comprises:
a substrate including an inner surface for carrying an article and an outer surface facing away from the inner surface; and
a non-stick coating disposed on said inner surface of said substrate and comprising a composite material according to any one of claims 1 to 4.
6. The non-stick cookware according to claim 5, characterized in that said non-stick coating has a thickness comprised between 20 and 100 μm.
7. A method of making a non-stick cookware, characterized in that the method comprises the steps of:
preparing a composite material according to any one of claims 1 to 4; and
the composite material is sprayed onto the substrate of the non-stick cookware using plasma spraying to form the non-stick coating.
8. The method according to claim 7, wherein the plasma spraying is performed under the following conditions: the flow rate of the main gas is 1500L/H to 2000L/H, the flow rate of the hydrogen is 80L/H to 120L/H, the voltage is 40V to 60V, the current is 450A to 550A, and the feeding rate of the composite material is 30g/min to 70g/min.
9. A method according to claim 7, characterized in that the diameter of the gun nozzle used for plasma spraying is 3mm to 7mm and the distance of the gun nozzle from the base body of the non-stick cookware is 80mm to 130mm.
10. The method of claim 7 further comprising sanding the non-stick coating.
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| CN202211230865.8A CN115517536A (en) | 2022-09-30 | 2022-09-30 | Composite material for non-stick cookware, non-stick cookware and manufacturing method thereof |
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| CN202211230865.8A CN115517536A (en) | 2022-09-30 | 2022-09-30 | Composite material for non-stick cookware, non-stick cookware and manufacturing method thereof |
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