CN115399629A - Non-stick cookware and preparation method thereof - Google Patents
Non-stick cookware and preparation method thereof Download PDFInfo
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- CN115399629A CN115399629A CN202211193715.4A CN202211193715A CN115399629A CN 115399629 A CN115399629 A CN 115399629A CN 202211193715 A CN202211193715 A CN 202211193715A CN 115399629 A CN115399629 A CN 115399629A
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- layer
- stick
- layered silicate
- grease
- cookware
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- 238000002360 preparation method Methods 0.000 title description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000004519 grease Substances 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 22
- 230000007704 transition Effects 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 12
- 229910052615 phyllosilicate Inorganic materials 0.000 claims description 11
- 229910001919 chlorite Inorganic materials 0.000 claims description 6
- 229910052619 chlorite group Inorganic materials 0.000 claims description 6
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 claims description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052622 kaolinite Inorganic materials 0.000 claims description 6
- 229910052629 lepidolite Inorganic materials 0.000 claims description 6
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 5
- 229910052626 biotite Inorganic materials 0.000 claims description 5
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 5
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052631 glauconite Inorganic materials 0.000 claims description 5
- 229910052900 illite Inorganic materials 0.000 claims description 5
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 5
- 229910052627 muscovite Inorganic materials 0.000 claims description 5
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 claims description 5
- 229910052628 phlogopite Inorganic materials 0.000 claims description 5
- 229910052903 pyrophyllite Inorganic materials 0.000 claims description 5
- 229910052623 talc Inorganic materials 0.000 claims description 5
- 239000000454 talc Substances 0.000 claims description 5
- 229910052902 vermiculite Inorganic materials 0.000 claims description 5
- 239000010455 vermiculite Substances 0.000 claims description 5
- 235000019354 vermiculite Nutrition 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 127
- 230000000052 comparative effect Effects 0.000 description 19
- 229910052782 aluminium Inorganic materials 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000000843 powder Substances 0.000 description 9
- 238000005507 spraying Methods 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 235000019198 oils Nutrition 0.000 description 8
- 235000019483 Peanut oil Nutrition 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000000312 peanut oil Substances 0.000 description 7
- 230000003746 surface roughness Effects 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000007750 plasma spraying Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000008157 edible vegetable oil Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000008415 Lactuca sativa Species 0.000 description 1
- 241000761557 Lamina Species 0.000 description 1
- 235000009754 Vitis X bourquina Nutrition 0.000 description 1
- 235000012333 Vitis X labruscana Nutrition 0.000 description 1
- 240000006365 Vitis vinifera Species 0.000 description 1
- 235000014787 Vitis vinifera Nutrition 0.000 description 1
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 235000021059 hard food Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 235000012045 salad Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Cookers (AREA)
Abstract
A non-stick cookware including a base layer and a non-stick layer formed on the base layer and a method of making the same are provided. The non-stick layer includes a layered silicate and a grease latched between the structures of the layered silicate. According to the inventive concept, a non-stick layer formed by latching grease using a layered silicate may have excellent non-stick properties.
Description
Technical Field
The invention relates to the technical field of non-stick, in particular to a non-stick coating and a preparation method thereof.
Background
Non-stick cookware includes fluororesin-based non-stick cookware. The process of the fluorine-containing resin non-stick cookware mainly comprises the step of forming a fluorine-containing resin non-stick layer on the surface of a substrate. The non-stick layer of the fluorine-containing resin has an advantage of being excellent in non-stick property. However, after a certain period of time, since the fluorine-containing resin has poor temperature resistance and a soft texture, the non-stick layer is easily damaged by high temperature or hard food, and finally formed to cause a decrease in non-stick property.
Disclosure of Invention
The present inventive concept has an object to provide a non-stick cooker and a method for preparing the same, by which a non-stick coating prepared has excellent non-stick properties.
According to an aspect of the inventive concept, a non-stick cookware includes a base layer and a non-stick layer formed on the base layer. The non-stick layer includes a layered silicate and a grease latched between the structures of the layered silicate.
The layered silicate may include at least one of pyrophyllite, kaolinite, muscovite, glauconite, grapestite, chlorite, illite, lepidolite, biotite, phlogopite, vermiculite, montmorillonite, talc, and serpentine.
The oil and fat can be edible oil and fat and is in a solid state.
The thickness of the non-stick layer may be in the range of 20 μm to 100 μm.
The non-stick cookware may also include a transition layer. The transition layer is arranged between the substrate layer and the non-stick layer.
According to another aspect of the inventive concept, a method of manufacturing a non-stick cookware includes: providing a substrate layer; providing a layered silicate material and applying it to the substrate layer to form a layered silicate layer; contacting the layered silicate layer with a fat such that at least a portion of the fat is locked between the structures of the layered silicate to form a non-stick layer, thereby producing a non-stick cookware, the method can further comprise: a transition layer is formed on the substrate layer, and then a layer silicate material is applied on the transition layer.
The step of forming the non-stick layer may include: the grease is brought into contact with the layer of phyllosilicate at a temperature in the range of 80 ℃ to 120 ℃ and the resulting structure is then sintered at a temperature in the range of 280 ℃ to 360 ℃.
The sintering time may be 1min to 5min.
The thickness of the non-stick layer may be in the range of 20 μm to 100 μm.
The method may further comprise: a transition layer is formed on the substrate layer, and then a layered silicate material is deposited on the transition layer.
According to the above brief description of the inventive concept, excellent non-stick properties of non-stick cookware can be achieved by latching grease using the layered structure of layered silicate.
Detailed Description
The present invention will now be described more fully hereinafter with reference to exemplary embodiments. This invention may, however, be embodied in many different forms and should not be construed as 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.
The non-stick cookware according to the inventive concept may include a base layer and a non-stick layer formed on the base layer.
The base layer may include at least one of an iron base, an aluminum base, a stainless steel base, a titanium base, and a composite base composed of the above-described base materials, and may have a surface profile of a cooker. However, the exemplary embodiments are not limited thereto.
The substrate layer may include an inner surface for receiving the space and an outer surface opposite to the inner surface, the inner surface of which may be provided with a non-stick layer, and the outer surface of which may be provided with a magnetic conductive layer, an anti-corrosion layer, a decorative layer, etc.
The non-stick layer provided on at least part (or all) of the inner surface of the base layer may be a structure formed by latching grease using the structure of the layer silicate.
Layered silicate mainly refers to a silicate having a layered crystal structure, which has a layered crystal structure like graphite. When the interlayer distance between layers in the layered silicate is larger, the distance between the crystal structures of the two layers of silicate is larger, so that the oil storage effect of the non-stick layer formed by the layered silicate is better.
According to an exemplary embodiment, the layered silicate may include at least one of pyrophyllite, kaolinite, muscovite, glauconite, grapestite, chlorite, illite, lepidolite, biotite, phlogopite, vermiculite, montmorillonite, talc, and serpentine, and examples of chemical formulas thereof may be represented by, but are not limited to, the following:
serpentine Mg 6 [Si 4 O 10 ](OH) 8 ；
Kaolinite Al 4 [Si 4 O 10 ](OH) 8 ；
Talc Mg 3 [Si 4 O 10 ](OH) 2 ；
Pyrophyllite Al 2 [Si 4 O 10 ](OH) 2 ；
Montmorillonite (Na, ca) 0.33 (Al,Mg,Fe) 2 [(Si,Al) 4 O 10 ](OH) 2 ·nH 2 O；
Vermiculite [ (Mg, ca) 0.5 (H 2 O) 4 ](Mg,Fe,Al) 3 [(Si,Al) 4 O 10 ](OH) 2 ；
Phlogopite KMg 3 [Si 3 AlO 10 ](OH,F) 2 ；
Biotite K (Mg, fe) 3 [Si 3 AlO 10 ](OH,F) 2 ；
Ferro-hydroxy mica KFe 3 [Si 3 AlO 10 ](OH,F) 2 ；
Muscovite KAl 2 [Si 3 AlO 10 ](OH,F) 2 ；
Lepidolite K (Li, al) 2.5-3 [Si 3.5-3 Al 0.5-1 O 10 ](OH,F) 2 ；
Lithium iron mica K (Li, fe, al) 3 [Si 3-3.5 Al 1-0.5 O 10 ](OH,F) 2 ；
Illite (K, H) 3 O)(Al,Mg,Fe) 2 [(Si,Al) 4 O 10 ](OH) 2 ；
Chlorite (Mg, al, fe) 6 [(Si,Al) 4 O 10 ](OH) 8 ；
Grape stone Ca 2 Al[Si 3 AlO 10 ](OH) 2 ；
Glauconite K (Fe, mg, al) 2 [Si 4 O 10 ](OH) 2 。
According to an exemplary embodiment, the layered structure of the layered silicate resembles a scale structure, with a single scale area of 1 μm 2 ～5μm 2 Because: the area is too small, and the strength of the formed laminated silicate layer is lower; on the contrary, when the area is too large, the non-tackiness property is liable to be poor. In addition, the layer-like pore spacing of the layer silicateLess than 0.5 μm is required because the strength of the layered silicate layer formed when it exceeds 0.5 μm is low.
Therefore, the layered silicate formed of the layered silicate has a specific pore structure, so that when the layered silicate layer of the layered structure is brought into contact with grease, the grease is locked between the structures of the layered silicate layer, and when the non-stick cookware contemplated by the present invention is heated, the locked grease slowly infiltrates into the surface of the layered silicate layer, making the non-stick layer non-stick.
According to an exemplary embodiment, the layered silicate layer may have a thickness of 20 μm to 100 μm. This is because, when the thickness is less than 20 μm, the layered silicate cannot latch sufficient grease, and thus is insufficient in non-tackiness; in addition, when the thickness is greater than 100 μm, the thicker layered silicate layer is more likely to delaminate from the base layer or transition layer during use, resulting in a reduced useful life of the non-stick cookware. However, the exemplary embodiments are not limited thereto. In addition, the layered silicate layer according to example embodiments may have a surface roughness (Ra) of less than 3 μm.
As described above, the phyllosilicate layer according to an exemplary embodiment has a structure capable of latching grease. Here, the fat may be an edible fat known in the art (e.g., soybean oil, salad oil, peanut oil, etc.), and may have a liquid state. However, the inventive concept is not limited thereto. Thus, the grease of the exemplary embodiments of the inventive concept may act as a sealant to seal voids or laminas in the formed phyllosilicate layer.
Because the grease is locked in the gaps or the interlayer gaps of the layered silicate layer, compared with a coating with a uniform pore structure (similar to a honeycomb), the layered structure layer of the layered silicate layer can ensure the oil absorption on the premise of protecting the strength of the barrier layer, and on the other hand, the oil quantity can be released more durably because the layered structure layer is not a through hole, so that the defect that the non-adhesiveness of the non-stick cooker with the coating and the oil storage of the honeycomb structure is reduced and even disappears after the non-stick cooker is boiled with soup can be prevented.
According to exemplary embodiments, a non-stick layer including a layered silicate layer latching grease may be directly disposed on the base layer, or a transition layer may be further disposed between the base layer and the non-stick layer in order to improve the bonding force between the non-stick layer and the base layer. According to an exemplary embodiment, the transition layer may include at least one of aluminum, aluminum alloy, zinc alloy, titanium alloy, copper alloy, nickel alloy, and stainless steel, and may have a thickness of 10 μm to 30 μm and a surface roughness of 5 μm to 10 μm.
The non-stick cookware of the present inventive concept has been described above in detail in connection with the exemplary embodiments, and hereinafter, the method of manufacturing the non-stick cookware of the present inventive concept will be described in detail.
A method of manufacturing a non-stick cookware according to an exemplary embodiment may include: (1) providing a substrate layer; (2) Providing a layered silicate material and applying it to the substrate layer to form a layered silicate layer; (3) The layered silicate layer is contacted with the oil such that at least a portion of the oil is locked between the structures of the layered silicate to form a non-stick layer.
According to an exemplary embodiment of the inventive concept, a base layer having a receiving space may be provided using a blank layer having a certain shape formed of at least one of an iron base, an aluminum base, a stainless steel base, a titanium base, and a composite base material combined by the above base materials. Here, the substrate layer may have an inner surface for laying the non-stick layer and an outer surface which may optionally lay the magnetic conductive layer, the rust preventive layer, and the like.
Further, after the base layer is provided, a sand blast treatment may be performed on the base layer (i.e., the inner surface of the base layer) so that the surface roughness of the base layer may be in the range of 3 μm to 8 μm to facilitate firm adhesion of the following layers. However, exemplary embodiments are not limited thereto, and the sand blasting step may be omitted.
In addition, in order to improve the bonding force between the layer of layered silicate to be formed later and the base layer, a transition layer may be directly provided on the base layer. That is, a transition layer may be provided on the inner surface of the substrate layer that is sandblasted or not sandblasted. According to an exemplary embodiment, the transition layer may include at least one of aluminum, aluminum alloy, zinc alloy, titanium alloy, copper alloy, nickel alloy, and stainless steel, and may have a thickness of 10 μm to 30 μm and a surface roughness of 5 μm to 10 μm. For example, a transition layer with a thickness of 10 μm to 30 μm and a surface roughness Ra in the range of 5 μm to 10 μm may be formed on the inner surface of the base layer by a plasma spraying process using metallic titanium with a grain size of 10 μm to 20 μm, and the process parameters may be: the current is 250A-350A, the voltage is 30V-60V, the flow rate of main gas (argon) is 1500L/H-2000L/H, the flow rate of hydrogen is 30L/H-50L/H, the flow rate of powder feeding gas is 20L/H-40L/H, the powder feeding amount is 20 g/min-50 g/min, the spraying distance (the distance between a gun nozzle and a workpiece) is 15 cm-25 cm, the spraying angle is 30-80 degrees, and the temperature of the workpiece is 10-40 ℃. However, exemplary embodiments of the inventive concept are not limited to the above-described processes and corresponding parameters, and the transition layer may be omitted.
Next, a layered silicate material may be prepared. According to an exemplary embodiment, the layered silicate material may include at least one of pyrophyllite, kaolinite, muscovite, glauconite, grapestite, chlorite, illite, lepidolite, biotite, phlogopite, vermiculite, montmorillonite, talc, and serpentine, and may have a powder particle size in a range of 20 μm to 100 μm.
After the layered silicate material is prepared, it may be deposited on a substrate layer using a layer-forming process to form a layered silicate layer. Here, the layered silicate material in the above-described particle size range may be sprayed on the inner surface of the base layer by means of thermal spraying (e.g., plasma spraying) to form the layered silicate layer. For example, when a thermal spray process is used to form the layered silicate layer, the process parameters may be: the current is 450A-600A; the voltage is 50V-80V; the flow rate of main gas (argon) is 1000L/H-2000L/H; the hydrogen flow rate is 50L/H-100L/H; the powder feeding flow is 20L/H-40L/H; the powder feeding amount is 20g/min to 50g/min; the spraying distance (the distance between a gun nozzle and a workpiece) is 15 cm-25 cm; the spraying angle is 30-80 degrees; the temperature of the workpiece is 10-40 ℃. Through the above process, a layered silicate layer having a thickness in the range of 20 to 100 μm may be formed on the base layer or the transition layer of the cooker. Here, the thermal spraying power depends on the value of current x voltage, and when the power value is too small, the layered silicate cannot be melted to form a coating, and when the power is too large, the layered structure is destroyed to cause failure in forming a layered thermal spray coating.
After the layered silicate layer is formed, the layered silicate layer may be subjected to a sanding treatment to smooth the surface of the layered silicate layer and control the surface roughness thereof to less than 3 μm. However, the exemplary embodiment is not limited thereto, and this step may be omitted.
Through the above steps, a structure (hereinafter, referred to as a green body) in which the layered silicate layer is attached to the inner surface of the base layer is obtained. Thereafter, a grease may be prepared, and the grease may be brought into contact with the formed phyllosilicate layer, that is, the phyllosilicate layer may be subjected to a sealing treatment using the grease.
According to a specific example, an edible oil (e.g., peanut oil) may be uniformly coated on the formed layered silicate layer, and then the body is placed at a temperature of 80 to 120 ℃ for 3 to 10min; and then, wiping off the redundant grease attached to the surface layer of the blank body by using a rag. According to another example, further, the green body obtained above may be sintered at a sintering condition of 280 to 360 ℃ for 1 to 5 minutes to solidify the edible oil, so that a problem of mold development of grease locked in the structure of the phyllosilicate layer during storage may be prevented and the cooker may be maintained to be non-sticky to some extent.
Through the steps, the non-stick cooker with excellent non-stick performance can be obtained.
In the following, the advantageous effects of the non-stick cookware of the inventive concept will be embodied in connection with specific examples.
Example 1
An aluminum pot base is provided.
The inner surface of the aluminum pot base body was subjected to sand blasting to control the roughness of the inner surface thereof within a range of 4 μm.
A transition layer having a thickness of 30 μm and a roughness of 8 μm was formed on the inner surface of the aluminum pot base by a plasma spraying technique using titanium particles having a metal particle size of about 10 μm. Here, the parameters of the plasma spraying process are: the current was 250A, the voltage was 40V, the flow rate of main gas (argon) was 1700L/H, the flow rate of hydrogen was 50L/H, the flow rate of powder feeding was 30L/H, the powder feeding amount was 20g/min, the spraying distance was 20cm, the spraying angle was 40 °, and the workpiece temperature was 20 ℃.
Kaolinite having a particle size of about 20 μm was sprayed on the transition layer using a plasma spraying technique to form a layered silicate layer having a thickness of 20 μm. Here, the parameters of the plasma spraying process are: the current is 600A; the voltage is 80V; the flow rate of main gas (argon) is 2000L/H; the hydrogen flow rate is 70L/H; the flow rate of the powder conveying gas is 40L/H; the powder feeding amount is 30g/min; the spraying distance is 20cm; the spraying angle is 40 degrees; the workpiece temperature was 20 ℃.
Thereafter, a sanding treatment may be performed on the phyllosilicate layer having a thickness of 20 μm so that the surface roughness of the phyllosilicate layer is controlled to 2 μm.
The substrate was then heated to 80 ℃ and peanut oil was applied to the phyllosilicate layer and held for 5min. Subsequently, the surface of the layer of layered silicate was wiped with a rag, and the substrate was placed in a sintering chamber at 280 ℃ for 1min for sintering, thereby obtaining a non-stick cooker of example 1.
Example 2
The difference from example 1 is that the phyllosilicate is chlorite.
Example 3
The difference from example 1 is that the layered silicate is lepidolite.
Example 4
The difference from example 1 is that the thickness of the non-stick layer is 60 μm.
Example 5
The difference from example 1 is that the thickness of the non-stick layer is 100 μm.
Example 6
The difference from example 1 is that no transition layer is included.
Example 7
The difference from example 1 is that the substrate is coated with peanut oil after heating to 100 ℃.
Example 8
The difference from example 1 is that the substrate is coated with peanut oil after heating to 120 ℃.
Example 9
The difference from example 1 is that the sintering temperature is 320 ℃.
Example 10
The difference from example 1 is that the sintering temperature was 360 ℃.
Example 11
The difference from example 1 is that the sintering time was 3min.
Example 12
The difference from example 1 is that the sintering time was 5min.
Comparative example 1
The difference from example 1 is that the layered silicate formed is not in contact with grease and is used directly as a non-stick layer.
Comparative example 2
The difference from example 1 is that the thickness of the non-stick layer is 10 μm.
Comparative example 3
The difference from example 1 is that the thickness of the non-stick layer is 150 μm.
Comparative example 4
The difference from example 1 is that the substrate is coated with peanut oil after heating to 60 ℃.
Comparative example 5
The difference from example 1 is that the substrate is coated with peanut oil after heating to 150 ℃.
Comparative example 6
The difference from example 1 is that the sintering temperature is 200 ℃.
Comparative example 7
The difference from example 1 is that the sintering temperature is 400 DEG C
The coatings of examples 1-12 and comparative examples 1-7 above were tested for their performance and the results are shown in the following table.
| Scheme(s) | Permanent tack-free property/time |
| Example 1 | 12000 |
| Example 2 | 11000 |
| Example 3 | 12000 |
| Example 4 | 13000 |
| Example 5 | 14000 |
| Example 6 | 10000 |
| Example 7 | 13000 |
| Example 8 | 14000 |
| Example 9 | 11000 |
| Example 10 | 10000 |
| Example 11 | 13000 |
| Example 11 | 11000 |
| Comparative example 1 | 1000 |
| Comparative example 2 | 5000 |
| Comparative example 3 | 15000 |
| Comparative example 4 | 9000 |
| Comparative example 5 | 14000 |
| Comparative example 6 | 8000 |
| Comparative example 7 | 1000 |
The method for testing the lasting non-stick property of the coating in the above table is as follows: the abrasion resistance test method described in reference GB/T32095.2-2015 shows that the permanent tack-free property is increased by one 1000 omelette tests compared with the abrasion resistance test.
From the above tests, it can be seen that: the non-stick cookware formed according to examples 1-12 has excellent long-lasting non-stick properties. In addition, although comparative examples 3 and 5 have higher permanent tack-free property, it is noted that: the non-stick layer of comparative example 3 is thicker, which increases the cost, and the increased cost is not in direct proportion to the improvement of the non-stick property, so the cost performance is not high; the substrate of comparative example 5 was heated at a higher temperature, which on the one hand caused workers to be scalded due to too much scalding, and on the other hand, heating caused an increase in cost without a significant increase in non-tackiness. In comparative example 7, since the sintering temperature was high, the grease was carbonized, and the non-tackiness was remarkably decreased.
While one or more embodiments of the present invention have been described, 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.
Claims (10)
1. A non-stick cookware, characterized in that the non-stick cookware comprises a base layer and a non-stick layer formed on the base layer,
wherein the non-stick layer comprises a layered silicate and a grease latched between the structures of the layered silicate.
2. The non-stick cookware of claim 1 wherein the layered silicate comprises at least one of pyrophyllite, kaolinite, muscovite, glauconite, grapestite, chlorite, illite, lepidolite, biotite, phlogopite, vermiculite, montmorillonite, talc and serpentine.
3. The non-stick cookware of claim 1 wherein the grease is edible grease and is in a solid state.
4. The non-stick cookware according to claim 1 wherein the thickness of said non-stick layer is in the range of 20 μm to 100 μm.
5. The non-stick cookware of claim 1 further comprising a transition layer, wherein said transition layer is disposed between said base layer and said non-stick layer.
6. A method of making a non-stick cookware, the method comprising:
providing a substrate layer;
providing a layered silicate material and applying it to the substrate layer to form a layered silicate layer;
the non-stick cookware is made by contacting the layered silicate layer with a grease such that at least a portion of the grease is locked between the structures of the layered silicate to form a non-stick layer.
7. The method of claim 6, wherein the step of forming the non-stick layer comprises:
the grease is brought into contact with the layer of phyllosilicate at a temperature in the range of 80 ℃ to 120 ℃ and the resulting structure is then sintered at a temperature in the range of 280 ℃ to 360 ℃.
8. The method of claim 7, wherein the sintering time is from 1min to 5min.
9. The method of claim 6, wherein the non-stick layer has a thickness in a range of 20 μm to 100 μm.
10. The method of claim 6, wherein the method further comprises:
a transition layer is formed on the substrate layer, and then a layer silicate material is applied on the transition layer.
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| CN115975410A (en) * | 2022-12-29 | 2023-04-18 | 武汉苏泊尔炊具有限公司 | Non-stick material, non-stick cooker and manufacturing method of non-stick material and non-stick cooker |
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