CN115517536B - Composite material for non-stick cookware, non-stick cookware and method for manufacturing same - Google Patents
Composite material for non-stick cookware, non-stick cookware and method for manufacturing same Download PDFInfo
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- CN115517536B CN115517536B CN202211230865.8A CN202211230865A CN115517536B CN 115517536 B CN115517536 B CN 115517536B CN 202211230865 A CN202211230865 A CN 202211230865A CN 115517536 B CN115517536 B CN 115517536B
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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
本发明提供了一种用于不粘炊具的复合材料以及不粘炊具及其制造方法。该复合材料基于复合材料的总重量包括：50wt％至80wt％的钙钛矿材料和20wt％至50wt％的韧性金属材料，其中，钙钛矿材料由ABO3表示，A包括碱土金属中的至少一种，B包括过渡金属中的至少一种，并且其中，韧性金属材料的断裂伸长率大于或等于12％。因此，包括包含该复合材料的不粘涂层的不粘炊具实现了材质稳定、硬度高、耐高温、不粘寿命长等效果。
The present invention provides a composite material for non-stick cookware, non-stick cookware and a method for manufacturing the same. The composite material comprises, based on the total weight of the composite material, 50wt% to 80wt% of a perovskite material and 20wt% to 50wt% of a ductile metal material, wherein the perovskite material is represented by ABO 3 , A comprises at least one of alkaline earth metals, B comprises at least one of transition metals, and wherein the elongation at break of the ductile metal material is greater than or equal to 12%. Therefore, the non-stick cookware including the non-stick coating containing the composite material achieves the effects of stable material, high hardness, high temperature resistance, long non-stick 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 role of non-stick by spraying a layer of fluororesin as a non-stick coating on the surface of a metal substrate. However, the non-stick cookware manufactured by using the fluororesin at present has the problems of short non-stick service life and the like, and is mainly characterized in the following aspects:
1. The high molecular material of the fluororesin has the characteristics of low hardness and wear resistance. When a non-stick cooker made of fluororesin is used to fry hard foods (e.g., shells, bones, etc.) or a metal spatula is used to fry foods, the non-stick coating of the non-stick cooker is easily scratched and fluffed, thereby causing non-stick failure of the non-stick cooker.
2. The fluorine resin coating is not resistant to high temperature aging, and is easy to age, yellow and the like when being used at a high temperature of more than 260 ℃ for a long time. However, when the non-stick cooker is used for cooking in daily life, the condition of dry burning is unavoidable, so that the problems of short service life of the fluorine resin non-stick coating and the like are caused.
Therefore, a new non-stick coating material needs to be developed to solve the problems of non-stick cookware, wear resistance, scratch resistance and short service life.
Disclosure of Invention
The present invention is directed to solving the above-mentioned technical problems in the related art. Therefore, the invention aims to provide a composite material for a non-stick cooker, the non-stick cooker and a manufacturing method thereof, thereby realizing the non-stick cooker with excellent characteristics of abrasion resistance, scratch resistance, long service life and the like.
According to one aspect of the present invention there is provided a composite material for a non-stick cookware, the composite material comprising, based on the total weight of the composite material, from 50 to 80wt% of a perovskite material and from 20 to 50wt% of a ductile metallic material, wherein the perovskite material is represented by ABO 3, a comprises at least one of alkaline earth metals, B comprises at least one of transition metals, wherein the ductile metallic material has an elongation at break of greater than or equal to 12%. By including a perovskite material and a ductile metal material of a predetermined weight, the composite material can 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 a predetermined perovskite material, the composite material may have high hardness, high stability, and good high temperature resistance.
In embodiments of the present invention, the ductile metallic material may comprise Fe, al, cu, ni or an alloy thereof. By using a predetermined ductile metallic material, the hardness of the composite material may be improved.
In embodiments of the invention, the average particle size of both the perovskite material and the ductile metal material may be from 10 μm to 100 μm. By controlling the particle sizes 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 comprising an inner surface carrying an article and an outer surface facing away from the inner surface, and a non-stick coating disposed on the inner surface of the substrate and comprising the above-described composite material. The non-sticking cooker has the characteristics of high hardness, high wear resistance, long service life and the like, and achieves the durable non-sticking use effect.
In embodiments of the invention, the thickness of the non-stick coating may be 20 μm to 100 μm. By controlling the thickness of the non-stick coating, the non-stick cooker can have high hardness, high stability and other properties.
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 above-described composite material, and spraying the composite material onto a substrate of the non-stick cookware using plasma spraying to form a non-stick coating. The non-stick cookware obtained by this method has high stability, high hardness and improved life in the case of using the above composite material.
In an embodiment of the present invention, plasma spraying may be performed under the conditions that a flow rate of the main gas is 1500L/H to 2000L/H, a flow rate of the hydrogen gas is 80L/H to 120L/H, a voltage is 40V to 60V, a current is 450A to 550A, and a rate of feeding 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 nozzle used for plasma spraying may be 3mm to 7mm and the distance of the nozzle 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 an embodiment of the present invention, there is provided a composite material for a non-stick cookware, and a non-stick cookware and a method of manufacturing the same. The non-stick cooker comprises a composite material containing a perovskite material and a ductile 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 from and be readily appreciated by the 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 invention.
Fig. 2 is a flowchart of a method of manufacturing a non-stick cookware according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below. While exemplary embodiments of the invention are described hereinafter, it should be understood that the invention may be embodied in various forms and should not be limited to 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 above, the non-stick coating included in the non-stick cookware of the prior art has more or less certain functional drawbacks, and the present invention therefore proposes a composite material for non-stick coating with more optimal performance.
In the embodiments of the present invention, in order to solve the problems of low hardness, poor abrasion resistance, poor scratch resistance, etc. of the fluororesin in the field of the composite material for non-stick cookware, the composite material including the perovskite material and the ductile metal material is innovatively used to prepare the non-stick cookware, thereby improving the non-stick effect, abrasion resistance, and scratch resistance of the non-stick cookware while improving the toughness of the composite material.
In embodiments of the present invention, the composite material for non-stick cookware may include a perovskite material and a ductile metal material. In particular, the composite material for non-stick cookware may include 50wt% to 80wt% perovskite material and 20wt% to 50wt% ductile metallic material based on the total weight of the composite material.
In an embodiment of the present invention, the perovskite material may be represented by ABO 3, a may include at least one of alkaline earth metals, and B may include at least one of transition metals. In an embodiment, a is Ca and B is Ti. Perovskite materials (in particular, perovskite titanate ceramic materials) have particular properties. Specifically, the perovskite material may have a typical ABX 3 crystal structure. As a representative of perovskite materials, the perovskite 113 may have a large number of oxygen vacancies and crystal defects in the structure. In the ABX 3 crystal structure of the perovskite material, the A site can be Ca metal cations, the B site can be Ti metal cations, and when the perovskite material 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-sticking effect is shown. In detail, as the most typical representative of perovskite materials, calcium titanate is currently commonly used in the photovoltaic industry, and has excellent photoelectric conversion efficiency. Calcium titanate belongs to a cubic crystal system, and calcium titanate often changes phase among cubic, tetragonal and orthorhombic crystal systems because calcium titanate crystals are easily distorted due to rotation of TiO 6 or displacement of cations, so that symmetry of a crystal structure is reduced. During lattice distortion of calcium titanate, the order of the material crystal structure is reduced, and the surface free energy is reduced, so that calcium titanate may exhibit a certain non-tackiness, and the magnitude of the non-tackiness may be related to the degree of lattice distortion of calcium titanate. Thus, perovskite materials may be used as composite materials 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 overcome, and the non-tackiness of the composite material is further increased.
In embodiments of the present invention, the weight of the perovskite material may be 50wt% to 80wt% based on the total weight of the composite material. Here, it is mainly considered that when the weight of the perovskite material is less than 50wt%, the non-sticking effect of the non-sticking coating layer made of the composite material including the perovskite material is not remarkable, and when the weight of the perovskite material is more than 80wt%, the non-sticking coating layer made of the composite material including the perovskite material is too brittle, and problems such as chipping of the non-sticking coating layer due to accumulation of thermal stress easily occur during the spraying process. Specifically, in embodiments of the present 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%, etc., based on the total weight of the composite material. 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％ or the like based on the total weight of the composite material.
In embodiments of the present invention, the weight of the ductile metallic material may be 20wt% to 50wt%, based on the total weight of the composite. Here, it is mainly considered that when the weight of the ductile metallic material is less than 20wt%, the non-stick coating layer made of the composite material including the ductile metallic material is too brittle, and when the weight of the ductile metallic material is more than 50wt%, the non-stick effect of the non-stick coating layer made of the composite material including the ductile metallic material is not significant. Specifically, in embodiments of the present invention, the weight of the ductile metallic 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%, etc., based on the total weight of the composite material. Specifically, the weight of the ductile metallic 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％ or the like based on the total weight of the composite.
In embodiments of the present invention, the ductile metallic 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 number of the cells to be processed, the elongation at break of the ductile metallic material may be 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%, greater than or equal to about 13% and less than or equal to about 19%, greater than or equal to about 14% 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 16% 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 13% and less than or equal to about 18%, about 18% >. About 14% or more and about 18% or less, about 15% or less and about 18% or less, about 16% or more and about 18% or less, about 17% or less and about 18% or less, about 13% or less and about 17% or less, about 14% or less and about 17% or less, about 15% or less and about 17% or less, about 16% or less and about 17% or less, about 13% or less and about 16% or less, about 14% or less and about 16% or less, about 15% or less and about 16% or less, about 13% or less and about 15% or less, about 14% or less and about 15% or about 14% or less, etc., specifically, the elongation at break of the ductile metallic material may be 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 an alloy thereof.
In embodiments of the invention, the perovskite material may have an average particle size of 10 μm to 100 μm. In particular, the method comprises the steps of, the perovskite material may have an average particle size of 10 μm to 90 μm, 10 μm to 80 μm, 10 μm to 70 μm, 10 μm to 60 μm, 10 μm to 50 μm, 10 μm to 40 μm, 10 μm to 30 μm, 10 μm to 20 μm, 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 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, etc. 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 an embodiment of the present invention, the average particle size of the ductile metallic material may be 10 μm to 100 μm. In particular, the method comprises the steps of, the average particle size of the ductile metallic material may be 10 μm to 90 μm, 10 μm to 80 μm, 10 μm to 70 μm, 10 μm to 60 μm, 10 μm to 50 μm, 10 μm to 40 μm, 10 μm to 30 μm, 10 μm to 20 μm, 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 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, etc. 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 finally formed non-stick coating may be 20 μm to 100 μm. Specifically, the thickness of the finally formed non-stick coating 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, 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, and the like. Specifically, the thickness of the finally formed non-stick coating layer may be 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, or the like.
A non-stick cookware comprising the above composite material will be described in detail below in connection with fig. 1.
Fig. 1 shows a schematic structural view of a non-stick cooker 100 according to an embodiment of the invention.
As shown in fig. 1, the non-stick cookware 100 includes a base 120 and a non-stick coating 140 on the surface of the base.
The substrate 120 may be a body of non-stick cookware, for example, when the non-stick cookware is a pot, the substrate may be a pot. The substrate 120 may be made of any suitable material commonly used in the art. The substrate 120 may include an inner surface that carries the article and an outer surface that faces 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 include the composite materials 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., a pan handle), only the main body portion of which is shown in fig. 1 by way of example, and other portions are not shown.
The non-stick cookware according to the present invention includes a non-stick coating formed by a composite material, so that the non-stick cookware has high hardness, high stability and improved life.
A method of manufacturing a non-stick cooker according to an embodiment of the invention will be described in detail with reference to fig. 2.
Fig. 2 is a flowchart of a method of manufacturing a non-stick cookware according to an embodiment of the 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 a substrate of the non-stick cookware 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 treatment to obtain perovskite material powder having an average particle size of 10 μm to 100 μm and ductile metal powder having an average particle size of 10 μm to 100 μm. The grinding treatment method can be any existing technology, and the invention is not limited to this. Alternatively, perovskite material powders having an average particle size of 10 μm to 100 μm and ductile metal powders having an average particle size of 10 μm to 100 μm may be directly purchased in a commercial manner. Then, the perovskite material powder and the ductile metal powder are uniformly mixed in a mass ratio of 4:1 to 1:1 to obtain a composite material.
In step S320, a spraying step is performed. Specifically, the composite material is preheated firstly to improve the fluidity of the composite material powder and prevent the problems of gun blockage and the like in the spraying step. And then, spraying the preheated composite material on a substrate of the non-stick cooker by using a plasma spraying process to form a non-stick coating. In the plasma spraying step, plasma spraying may be performed in such a manner that the flow rate of the main gas (specifically, argon gas) is 1500L/H to 2000L/H, the flow rate of the hydrogen gas is 80L/H to 120L/H, the voltage is 40V to 60V, the current is 450A to 550A, the rate of feeding 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-sticking cooker is 80mm to 130mm. By the above steps, a non-stick cooker having a non-stick coating layer with a thickness of 20 μm to 100 μm can be prepared.
In step S330, sanding processing is performed. The sanding treatment method can adopt any existing technology, and the invention is not limited to the method.
The composite material is coated on the surface of the non-stick pan, so that the finally formed non-stick pan has improved non-stick property, and the effects of stable material, high hardness, high temperature resistance, long non-stick life and the like are achieved.
The composite material of the present invention and the method of manufacturing the non-stick cooker will be described in detail with reference to examples and comparative examples.
Example 1
A perovskite material and a ductile metal material are adopted to prepare the composite material for the non-stick cookware. Specifically, a calcium titanate material powder having an average particle diameter of 20 μm and a FeTi 30 alloy powder having an average particle diameter of 20 μm were uniformly mixed at a mass ratio of 4:1 to obtain a composite material. The composite material is then preheated and plasma sprayed after preheating.
In the step of preparing a cookware-free pot blank, an aluminum alloy pot blank is used as a spray-coated base material, and a base material treatment is performed by sand blasting, wherein the pot blank is sand blasted with 40-60 mesh brown alumina so that the pot blank has a roughness (Rz) of 30 μm to 50 μm.
In the plasma spraying process, the specific parameters are that the flow rate of supplying argon is 1500L/H, the flow rate of supplying hydrogen is 100L/H, the voltage is 50V, the current is 500A, the speed of feeding the composite material is 30g/min, the diameter of a straight hole gun nozzle is 5mm, and the distance from a spray gun to a pot embryo is 80mm.
The average thickness of the non-stick coating finally formed by the above steps was 50 μm.
And after the plasma spraying is finished, sanding the formed non-stick coating to obtain the non-stick cooker with smooth inner surface.
Example 2
The difference from example 1 is that the mass ratio of the calcium titanate material powder to the FeTi 30 alloy powder is 2:1.
Example 3
The difference from example 1 is that the mass ratio of the calcium titanate material powder to the FeTi 30 alloy powder is 1:1.
Comparative example 1
A composite material for non-sticking cookware is prepared by adopting fluororesin. Specifically, polytetrafluoroethylene is adopted as a coating material, and a non-stick cooker is prepared in an air spraying and sintering curing mode, wherein the polytetrafluoroethylene comprises 45wt% of polytetrafluoroethylene resin, 35wt% of water, 5wt% of diethylene glycol ethyl ether, 5wt% of glycerol and 10wt% of polyoxyethylene glycol alkyl ether.
In the air spraying process, specific parameters are as follows, the spraying distance is 160mm, the air pressure is 0.3MPa, and the flow is 8L/min.
In the sintering solidification process, specific parameters are as follows, the sintering temperature is 420 ℃ and the temperature is kept for 6min.
The average thickness of the non-stick coating finally formed by the above steps was 20 μm.
Comparative example 2
A composite material for non-stick cookware is prepared from a non-stick ceramic material. Specifically, non-stick ceramic is used as a coating material, and the non-stick cooker is prepared in an air spraying and sintering curing mode, 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, specific parameters are as follows, the spraying distance is 160mm, the air pressure is 0.3MPa, and the flow is 10L/min.
In the sintering solidification process, 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 steps was 20 μm.
Test of non-stick cookware Performance
The non-sticking effect of the non-sticking coating of the non-sticking cookware prepared in examples 1 to 3 and comparative examples 1 and 2 was tested using an acceleration simulation test and a durable non-sticking test. Specifically, the test method is as follows:
(1) Accelerated simulation (non-stick life) test
The non-sticking life of the non-sticking cookers prepared in examples 1 to 3 and comparative examples 1 and 2 was evaluated with reference to the accelerated simulation test procedure of the non-sticking cookers. The test flow is as follows:
The non-sticking cookers prepared in examples 1 to 3 and comparative examples 1 and 2 were subjected to vibration abrasion resistance test, dry-fire mixed sauce test, boiled brine test, quartz stone (iron spade) test and omelet evaluation non-sticking grade test in this order. When all of the above test steps are completed, one test cycle is marked as being completed.
In the vibration abrasion resistance test, specific parameters are as follows:
The instrument is a vibration wear-resistant tester.
The testing method comprises 1) putting 1Kg of quartz stone (particle size is 9-12 mm) into a non-stick cooker, 2) placing the non-stick cooker 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 testing is finished, and cleaning and wiping the inner surface of the non-stick cooker with a detergent.
The replacement period of the quartz stone is 1 time/month.
In the dry mixed sauce test, specific parameters are as follows:
The ingredients comprise soy sauce, vinegar, cooking wine, monosodium glutamate, salt, sugar and edible oil.
The testing procedure and the steps are that 1) mixed sauce is prepared according to the following weight ratio of soy sauce, cooking wine, monosodium glutamate, salt and sugar, all ingredients are completely dissolved and uniformly mixed according to the weight ratio of edible oil=4:3:2:1:1:2:2 (mass ratio), 2) 50g of mixed sauce is put into a non-stick cooker, the non-stick cooker is shaken until the sauce uniformly covers the bottom of a pot of the non-stick cooker, 3) the non-stick cooker is placed on a gas stove to be dried and burned to 250 ℃ to 270 ℃ and kept for 2min, heating is stopped, and 4) the non-stick cooker is washed with water, and then a pollution area in the non-stick cooker is washed cleanly by using the detergent and the rag.
In the boiled brine test, specific parameters are as follows:
The ingredients are 50g of salt and 950g of water.
The test procedure and steps are 1) weighing 50g of salt and 950g of water to prepare 5wt% salt water, pouring the salt water into a non-stick cooker, 2) starting timing after the water is boiled, keeping micro-boiling for 10min, adding water according to the situation to keep the concentration unchanged, and 3) cleaning the non-stick cooker with tap water and drying after the boiling for a prescribed time.
In the quartz stone (iron shovel) stir-frying test, specific parameters are as follows:
1Kg of quartz stone with the grain diameter of 9-12 mm, oil, vinegar, cooking wine, soy sauce and salt.
The test procedure and steps are 1) pouring 15g of edible oil into a non-stick cooker, shaking uniformly until the whole inner surface is impregnated, heating to generate oil smoke, then pouring 1Kg of quartz stone into the non-stick cooker, adding a small amount of vinegar, cooking wine, soy sauce, water and salt, uniformly stir-frying for 10min, 2) after the end, cleaning the inner surface of the non-stick cooker with detergent and wiping the inner surface dry, and 3) filtering the soup stock after each cycle is finished, leaving the quartz stone for the next cycle use.
The replacement period of the quartz stone is 1 time/month
In the acceleration simulation test, after each cycle is completed, the non-sticking life of the non-sticking cookware is determined. When the non-stick cooker is one of the following phenomena, the test endpoint can be judged, namely (1) the non-stick performance of the fried eggs is reduced, namely, the non-stick performance of the fried eggs is continuously improved to III level, and (2) the appearance is damaged, namely, the coating is fluffed, the diameter of the falling area of the coating is larger than 3mm 2, the substrate is obviously exposed by abrasion, the penetrating scratch (substrate exposure) of the coating is more than 3, or the dirt which cannot be washed out by the wet rag is generated.
The number of times of the accelerated simulation test cycle when the test reaches the end point is recorded, namely the non-stick life of the non-stick cooker, and the more the number of times of the cycle is, the longer the non-stick life of the non-stick coating of the non-stick cooker is. In general, the number of cycles is 3 or more, and the product is qualified.
(2) Testing of permanent non-tackiness
The non-sticking cookware prepared in examples 1 to 3 and comparative examples 1 and 2 were evaluated for their durable non-sticking with reference to the 5.6.9 durable non-sticking test method in national standard GB/T32388-2015.
The non-sticking life and the long-lasting non-sticking test results of the non-sticking cookware prepared in examples 1 to 3 and comparative examples 1 and 2 are shown in table 1.
TABLE 1
| Sample of | 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 |
| Example 2 | II | 10 | 20000 |
| Example 3 | II | 7 | 12000 |
In general, when the LNE lifetime of the non-stick coating is greater than or equal to 5, and the durable non-stick lifetime of the non-stick coating is greater than or equal to 10000, the non-stick cookware can be considered to have improved non-stick properties.
As can be seen from the data in table 1, the non-stick coatings according to examples 1 to 3 of the present invention have improved non-stick life and durable non-stick properties as compared to comparative examples 1 and 2.
In summary, according to the embodiment of the present invention, since the composite material for the non-stick coating layer may include the perovskite material and the ductile metal material, the abrasion resistance, hardness, non-stick life and long-lasting non-stick property of the non-stick coating layer can be improved, and effects of stable material, long non-stick life, and the like can be achieved.
The invention produces a non-stick coating with optimized properties by reasonably optimizing the composition of the composite material used for the non-stick coating. The non-stick cooker manufactured by the composite material realizes multiple performances such as iron-spade resistance, lasting non-stick performance and the like, thereby greatly improving user experience.
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 specific embodiments of the invention but by the claims, and all differences within the scope will be construed as being included in the present invention.
Claims (10)
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