A non-stick pot disc manufacturing process and a non-stick pot disc

Abstract

The application belongs to the technical field of kitchen utensils, and discloses a non-stick pot plate manufacturing process and a non-stick pot plate. The non-stick pot plate manufacturing process comprises the following steps: predefining a pattern, etching treatment, bottom oil non-stick coating spraying treatment and surface oil non-stick coating spraying. The preparation process of the bottom oil non-stick coating comprises the following steps: mixing water, glycerol, nano iron oxide, polytetrafluoroethylene, silane coupling agent, polyhydroxyethyl methacrylate, sodium dodecyl benzene sulfonate and water-based hydroxyl acrylic resin, adding lysine diisocyanate, and forming the bottom oil non-stick coating. The preparation process of the surface oil non-stick coating comprises the following steps: mixing water, nano silicon nitride, silane coupling agent, sodium dodecyl benzene sulfonate, polyhydroxyethyl methacrylate, polytetrafluoroethylene and amino resin, adding triethylenetetramine, and forming the surface oil non-stick coating. The concave-convex patterns on the inner surface of the non-stick pot plate form multiple heating zones. The non-stick coating layer on the surface of the non-stick pot plate has good adhesion, wear resistance and impact resistance.

Description

Technical Field

[0001] This invention belongs to the field of kitchenware technology, and specifically relates to a non-stick pan manufacturing process and a non-stick pan. Background Technology

[0002] Non-stick pans are widely used, but after prolonged use, they tend to become dirty and black, making cleaning difficult and significantly reducing their non-stick properties.

[0003] Currently, non-stick pans with textured surfaces are made by directly spraying a base coat of non-stick paint onto the pan blank, then drying it in a dryer. Next, the raised areas are polished with sandpaper, leaving them unprotected by the non-stick coating. Finally, a top coat of non-stick paint is applied. However, these non-stick pans are prone to coating peeling over time, and their wear resistance decreases. Furthermore, the impact resistance of the existing non-stick coating on the surface of these pans needs improvement.

[0004] Therefore, there is an urgent need to provide a new non-stick pan preparation process that enables the non-stick coating on the surface of the non-stick pan to have good adhesion, wear resistance, and further, good impact resistance. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a non-stick pan manufacturing process and a non-stick pan itself. The non-stick coating on the surface of the non-stick pan prepared by this process has good adhesion, wear resistance, and impact resistance, thereby greatly improving the performance and lifespan of the non-stick pan. The patterned design on the bottom of the non-stick pan not only helps to increase the heating area but also enhances its aesthetic appeal.

[0006] The inventive concept of this invention is to form a base oil coating and a top oil coating on the surface of a pan blank. The base oil non-stick coating is prepared by water, glycerin, nano-iron oxide, polytetrafluoroethylene, silane coupling agent, poly(hydroxyethyl methacrylate), sodium dodecylbenzenesulfonate, waterborne hydroxyl acrylic resin, and lysine diisocyanate. The top oil non-stick coating is prepared by water, nano-silicon nitride, silane coupling agent, sodium dodecylbenzenesulfonate, poly(hydroxyethyl methacrylate), polytetrafluoroethylene, amino resin, and triethylenetetramine. The use of a silane coupling agent is beneficial to enhancing the dispersion uniformity of the various organic and inorganic components. Poly(hydroxyethyl methacrylate) modifies and activates the surface of the nano-iron oxide, and through cross-linking reactions with waterborne hydroxyl acrylic resin and lysine diisocyanate, the base oil coating is firmly bonded to the surface of the pan blank. The top oil non-stick coating also contains poly(hydroxyethyl methacrylate), which helps to increase the bonding strength between the base oil coating and the top oil coating. Modification of nano-silicon nitride with silane coupling agents and poly(hydroxyethyl methacrylate) facilitates its uniform dispersion and, combined with the crosslinking reaction of amino resins, significantly improves the abrasion resistance of the topcoat. Furthermore, the crosslinking reaction of the amino resin in the topcoat non-stick coating and the crosslinking curing of the waterborne hydroxyl acrylic resin in the base coat non-stick coating significantly enhances the overall abrasion resistance and impact strength of the coating.

[0007] The first aspect of the present invention provides a process for manufacturing a non-stick pan.

[0008] Specifically, a non-stick pan manufacturing process includes the following steps:

[0009] S1. Silk screen print the ink with the predetermined pattern onto the surface of the pot plate blank, and then dry and cure it;

[0010] S2. Using an etching process, the areas on the surface of the S1 pan blank without screen printing ink are etched to create a raised pattern on the surface of the pan blank. After cleaning and drying, the pan blank is then stamped, stretched, degreased, and sandblasted.

[0011] S3. The pan blank processed in step S2 is preheated, cooled, and then coated with a non-stick base oil coating to form a base oil coating.

[0012] S4. Spray a non-stick topcoat onto the base oil coating to form a top oil coating, and dry it to obtain the non-stick pan.

[0013] The preparation process of the base oil non-stick coating includes: stirring and mixing water, glycerin, nano iron oxide, polytetrafluoroethylene, silane coupling agent, polymethyl methacrylate, sodium dodecylbenzene sulfonate, and waterborne hydroxyl acrylic resin, and then adding lysine diisocyanate to form the base oil non-stick coating.

[0014] The preparation process of the non-stick topcoat includes: water, nano-silicon nitride, silane coupling agent, sodium dodecylbenzene sulfonate, polyhydroxyethyl methacrylate, polytetrafluoroethylene, amino resin, and triethylenetetramine to form a non-stick topcoat.

[0015] Preferably, the textured surface of the non-stick pan forms multiple heating zones, including a first zone, a second zone, and a third zone located between the first zone and the second zone. The first zone has multiple parallel first ribs, the second zone has multiple parallel second ribs, and the third zone has multiple parallel third ribs. The first ribs and the second ribs are arranged parallel to each other, and the first ribs and the third ribs are arranged at an angle.

[0016] Preferably, the first region is a right triangle, and the first rib is perpendicular to the hypotenuse of the right triangle.

[0017] Preferably, the third region is rectangular, and the third rib is set at an acute or obtuse angle to the side of the rectangle.

[0018] Preferably, the first and second regions are right triangles, the third region is a rectangle, and the first, second, and third regions together form a parallelogram that encloses the area.

[0019] Preferably, the first zones of the plurality of heating zones are distributed radially from the center, and at the center, the first ribs of the plurality of first zones are arc lines, radial lines, or bends radiating from the center.

[0020] Preferably, the third region of the plurality of heating zones is distributed radially from the center, and the outer contour of the area enclosed by the plurality of heating zones is a regular hexagon.

[0021] Preferably, the end of the first rib is located between two adjacent third ribs.

[0022] Preferably, in step S1, the pattern is a hexagonal three-dimensional pattern.

[0023] Preferably, the preparation process of the base oil non-stick coating includes, by weight, mixing 50-70 parts water, 4-15 parts glycerin, 0.5-3.5 parts nano iron oxide, 5-16 parts polytetrafluoroethylene, 1-10 parts silane coupling agent, 1-12 parts polymethyl methacrylate, 1-10 parts sodium dodecylbenzene sulfonate, and 5-15 parts waterborne hydroxyl acrylic resin, and then adding 0.5-5 parts lysine diisocyanate to form the base oil non-stick coating.

[0024] More preferably, the preparation process of the base oil non-stick coating includes, by weight, mixing 55-65 parts water, 8-15 parts glycerol, 1-3 parts nano iron oxide, 6-15 parts polytetrafluoroethylene, 1-9 parts silane coupling agent, 3-10 parts polymethyl methacrylate, 1-5 parts sodium dodecylbenzene sulfonate, and 8-15 parts waterborne hydroxyl acrylic resin, and then adding 0.5-2.5 parts lysine diisocyanate to form the base oil non-stick coating.

[0025] Preferably, the preparation process of the non-stick topcoat includes: mixing 20-40 parts water, 0.1-2 parts nano-silicon nitride, silane coupling agent, 1-5 parts sodium dodecylbenzenesulfonate, 1-5 parts polymethyl methacrylate, 5-10 parts polytetrafluoroethylene, and 5-20 parts amino resin, and then adding 1-6 parts triethylenetetramine to form a non-stick topcoat.

[0026] More preferably, the preparation process of the non-stick topcoat includes: mixing 20-40 parts water, 0.5-1 parts nano-silicon nitride, silane coupling agent, 1-3 parts sodium dodecylbenzenesulfonate, 1-4 parts polymethyl methacrylate, 5-8 parts polytetrafluoroethylene, and 8-20 parts amino resin, and then adding 1-6 parts triethylenetetramine to form a non-stick topcoat.

[0027] Preferably, cyclodextrin is added during the preparation of the base oil non-stick coating. For example, 0.5-5 parts of cyclodextrin are added. Due to its special cyclic molecular structure and polyhydroxy structure, cyclodextrin can not only include inorganic nano-iron oxide, but also undergo cross-linking reactions with water-based hydroxyl acrylic resin and lysine diisocyanate, making the coating formed by the base oil non-stick coating firmly bonded to the surface of the pan blank, and significantly improving adhesion.

[0028] Preferably, the preparation process of the base oil non-stick coating includes, by weight, mixing 55-65 parts water, 8-15 parts glycerol, 1-3 parts nano iron oxide, 6-15 parts polytetrafluoroethylene, 1-9 parts silane coupling agent, 3-10 parts polymethyl methacrylate, 0.5-5 parts cyclodextrin, 1-5 parts sodium dodecylbenzenesulfonate, and 8-15 parts waterborne hydroxyl acrylic resin, then adding 0.5-2.5 parts lysine diisocyanate and mixing to form the base oil non-stick coating.

[0029] Preferably, both the base oil non-stick coating and the top oil non-stick coating contain a defoamer, such as polydimethylsiloxane.

[0030] Preferably, the stirring speed is 800-2000 rpm and the stirring time is 5-30 minutes; more preferably, the stirring speed is 1200-1800 rpm and the stirring time is 5-10 minutes.

[0031] Preferably, the temperature during stirring is 15-30°C, and more preferably 15-20°C.

[0032] Preferably, the base oil non-stick coating also includes pigments for forming various desired non-stick layer colors, thereby further improving aesthetics.

[0033] Preferably, in step S1, the pot plate blank is made of steel, and more preferably a three-layer steel composite planar blank, with the outer and inner layers being stainless steel and the middle layer being an aluminum alloy composite.

[0034] Preferably, in step S1, the predetermined pattern described is a polygonal pattern with a uniform matrix distribution, such as a honeycomb pattern with square or hexagonal shapes.

[0035] Preferably, in step S2, the etching depth is 0.03-0.2 mm. This design results in multiple independent or non-independent oil grooves distributed on the inner surface of the pan. The stamping and stretching in step S2 serves to form the desired pan shape, which is a conventional operation in the art.

[0036] Preferably, in step S2, the degreasing refers to sintering the residual grease on the pan blank in a high-temperature furnace at a temperature of 160-480℃, which also helps to remove the dirt left on the surface of the pan blank after stretching.

[0037] Preferably, in step S2, the thickness of the sandblasting treatment is 0.3-4.5μm; this treatment mainly involves high-pressure sandblasting of the inner surface of the pan blank, and the materials used for sandblasting treatment are one or more of the following: quartz sand, brown corundum, river sand, glass beads, and steel beads; the particle size of the materials used is 60-230 mesh.

[0038] Preferably, in step S3, the preheating temperature is 50-150℃ and the treatment time is 3-30 minutes; more preferably, the preheating temperature is 90-120℃ and the treatment time is 12-15 minutes.

[0039] Preferably, in step S3, the base oil non-stick coating spraying treatment results in a base oil coating thickness of 5-30 μm; more preferably 10-25 μm. A thinner coating helps to improve the adhesion between the coating and the surface of the pan blank.

[0040] Preferably, in step S4, the topcoat non-stick coating spraying treatment results in a topcoat coating thickness of 5-11 μm; more preferably 8-10 μm. A thinner coating helps to improve the adhesion between the topcoat coating and the base coat non-stick coating surface.

[0041] Preferably, in step S4, the drying temperature is 80-120℃ and the drying time is 40-120 minutes; more preferably, the drying temperature is 90-110℃ and the drying time is 60-80 minutes.

[0042] Preferably, the non-stick pan includes common kitchen utensils such as woks, frying pans, saucepans, and baking pans.

[0043] A second aspect of the present invention provides a non-stick pan.

[0044] A non-stick pan is prepared by the above-described method.

[0045] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0046] (1) A base oil coating and a top oil coating are formed on the surface of the pan blank. The base oil non-stick coating of the present invention is prepared by water, glycerin, nano iron oxide, polytetrafluoroethylene, silane coupling agent, poly(hydroxyethyl methacrylate), sodium dodecylbenzenesulfonate, waterborne hydroxy acrylic resin, and lysine diisocyanate. The top oil non-stick coating is prepared by water, nano silicon nitride, silane coupling agent, sodium dodecylbenzenesulfonate, poly(hydroxyethyl methacrylate), polytetrafluoroethylene, amino resin, and triethylenetetramine. The use of silane coupling agent is beneficial to enhancing the dispersion uniformity of each organic and inorganic component. Among them, poly(hydroxyethyl methacrylate) plays a modifying and activating role on the surface of nano iron oxide. Through the cross-linking reaction with waterborne hydroxy acrylic resin and lysine diisocyanate, the base oil coating is firmly bonded to the surface of the pan blank. The top oil non-stick coating also contains poly(hydroxyethyl methacrylate), which helps to increase the bonding strength between the base oil coating and the top oil coating. Modification of nano-silicon nitride with silane coupling agents and poly(hydroxyethyl methacrylate) facilitates its uniform dispersion and, combined with the crosslinking reaction of amino resins, significantly improves the abrasion resistance of the topcoat. Furthermore, the crosslinking reaction of the amino resin in the topcoat non-stick coating and the crosslinking curing of the waterborne hydroxyl acrylic resin in the base coat non-stick coating significantly enhances the overall abrasion resistance and impact strength of the coating.

[0047] (2) Cyclodextrin is also added during the preparation of the base oil non-stick coating. Due to its special cyclic molecular structure and polyhydroxy structure, cyclodextrin can not only include inorganic nano iron oxide, but also undergo cross-linking reaction with water-based hydroxyl acrylic resin and lysine diisocyanate, so that the coating formed by the base oil non-stick coating is firmly bonded to the surface of the pan blank and the adhesion is significantly improved.

[0048] (3) The preparation process of the present invention is relatively simple, and a non-stick pan with good wear resistance and impact resistance can be obtained when the film layer is thin. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of a baking pan according to the present invention.

[0050] Reference numerals: 1 - disc body, 2 - heating zone, 3 - first zone, 4 - second zone, 5 - third zone, 6 - first rib, 7 - second rib, 8 - third rib, 10 - heat conduction zone, 11 - fourth rib, 12 - inclined guide wall. Detailed Implementation

[0051] To enable those skilled in the art to more clearly understand the technical solutions described in this invention, the following embodiments are provided for illustration. It should be noted that the following embodiments do not constitute a limitation on the scope of protection claimed by this invention.

[0052] Unless otherwise specified, the raw materials, reagents or devices used in the following examples are available from conventional commercial sources or can be obtained by existing known methods.

[0053] Figure 1 This is a schematic diagram of the structure of a baking pan according to the present invention.

[0054] Reference Figure 1 The baking pan mainly includes a pan body 1, which has a cavity for holding food. The edge of the pan body 1 is provided with a support rim to facilitate the pan body 1 to be placed on an oven or other cooking appliance for heating.

[0055] The outer surface of the disk body 1 is mostly smooth or high-gloss, which improves the quality of the disk body 1 and makes it easy to clean.

[0056] The inner surface of plate 1 is uneven to increase the heat conduction area and improve cooking efficiency.

[0057] The inner surface of the disc body 1 has multiple heating zones 2, which are mostly concentrated on the bottom wall of the disc body 1. The heating zones 2 include a first zone 3, a second zone 4, and a third zone 5 located between the first zone 3 and the second zone 4. The first zone 3 has multiple parallel first ribs 6, the second zone 4 has multiple parallel second ribs 7, and the third zone 5 has multiple parallel third ribs 8. The first ribs 6 and the second ribs 7 are arranged parallel to each other, and the first ribs 6 and the third ribs 8 are arranged at an angle.

[0058] in, Figure 1 The dotted lines in the diagram indicate the division of areas and are not the actual structure of the product. Also, heating zone 2 is enlarged relative to the actual product, and the size shown is not the actual size of the product. It is just a diagram for easy understanding.

[0059] In summary, the baking pan is configured with multiple heating zones 2, which include a first zone 3, a second zone 4, and a third zone 5 located between the first zone 3 and the second zone 4. The first zone 3 has multiple parallel first ribs 6, the second zone 4 has multiple parallel second ribs 7, and the third zone 5 has multiple parallel third ribs 8. The first ribs 6 and the second ribs 7 are arranged parallel to each other, and the first ribs 6 and the third ribs 8 are arranged at an angle.

[0060] Therefore, the multiple parallel first ribs 6, multiple parallel second ribs 7, and multiple parallel third ribs 8 can support the food, allowing the food to separate from the oil, preventing it from sticking together, reducing the oil content in the food, and meeting the needs of consumption.

[0061] At the same time, multiple first ribs 6 are parallel, multiple second ribs 7 are parallel, and multiple third ribs 8 are parallel, which facilitates the flow of grease along the first ribs 6, second ribs 7 or third ribs 8, and also reduces grease retention and reduces the amount of grease.

[0062] At the same time, during cleaning, push and pull food residue along the direction of the first rib 6, the second rib 7, or the third rib 8 to facilitate the movement and separation of food residue along the grooves formed between the ribs, making cleaning easier.

[0063] Meanwhile, the angle between the first rib 6 and the third rib 8 is set so that the first rib 6, the second rib 7 and the third rib 8 can restrict deformation in different directions, improve the strength of the disc body 1 and reduce the overall deformation of the disc body 1.

[0064] Meanwhile, the first rib 6 and the third rib 8 are set at an angle, so that at least one of the first rib 6, the second rib 7 and the third rib 8 has an angle with the spatula, which can prevent the spatula from getting stuck in the groove between the ribs and avoid affecting cooking.

[0065] Meanwhile, the angle between the first rib 6 and the third rib 8 provides friction in different directions, making it easier to unfold or lay food flat, facilitating cooking and enhancing the user experience.

[0066] The first zone 3 is a right triangle, and the first rib 6 is perpendicular to the hypotenuse of the right triangle.

[0067] It is easy to understand that by making the first zone 3 a right triangle and the first rib 6 perpendicular to the hypotenuse of the right triangle, the baking pan can increase the number of first ribs 6 while shortening their length, thus satisfying the support requirements, reducing the waste of oil, and facilitating the flow of hot air generated during heating, so that the food is heated evenly and avoids local overheating that could cause the food to burn or become mushy.

[0068] The third zone 5 is a rectangle, and the third rib 8 is set at an acute or obtuse angle to the side of the rectangle.

[0069] It is easy to understand that by making the third zone 5 rectangular and the third rib 8 at an acute or obtuse angle to the side of the rectangle, this baking pan has two advantages. First, the rectangular shape of the third zone 5 increases the support area, providing stable support for the food and making it easier to lay the meat slices flat, reducing the folding of the meat slices' edges. Second, the acute or obtuse angle between the third rib 8 and the side of the rectangle also helps to increase the number of ribs. At the same time, shortening the length of the ribs not only meets the support requirements but also reduces the waste of oil and facilitates the flow of hot air generated during heating, so that the food is heated evenly and avoids local overheating that could cause the food to burn or become charred.

[0070] Zone 3 and Zone 4 are right triangles, and Zone 5 is a rectangle. Zone 3, Zone 4 and Zone 5 together form a parallelogram-enclosed area.

[0071] It is easy to understand that by combining the first zone 3, the second zone 4, and the third zone 5 into a parallelogram, the baking tray not only satisfies the need for the first zone 3, the second zone 4, and the third zone 5 to be arranged in groups, but also facilitates the array arrangement and reduces the manufacturing difficulty.

[0072] The inclined guide wall 12 is designed to facilitate the sliding of food in and to facilitate the placement of various foods that are not easy to stick to the plate 1, thus meeting multiple usage needs.

[0073] The inner surface of the disk 1 is provided with a heat-conducting zone 10, which includes a number of parallel bent fourth ribs 11.

[0074] It is easy to understand that by setting the fourth rib 11, manufacturing can be simplified and manufacturing difficulty reduced. At the same time, it also increases the heat dissipation area of ​​the inner surface of the plate 1, making it easier to heat the food from the side and above, so that the food is heated more evenly.

[0075] Example 1

[0076] A non-stick pan manufacturing process includes the following steps:

[0077] S1. Silk screen print a predetermined pattern (hexagonal three-dimensional pattern) on the surface of the pan blank (a three-layer steel composite flat blank, with the outer and inner layers made of stainless steel and the middle layer made of aluminum alloy composite), and then dry and cure it (this step is a conventional process in this field).

[0078] S2. Using an etching process, the areas on the surface of the S1 pan blank without screen printing ink are etched (the etching depth is 0.07±0.2mm, and etching is a conventional process in this field), so that the surface of the pan blank is formed with an uneven pattern. After cleaning and drying, it is then stamped, stretched, degreased (380℃ degreased), and sandblasted (the thickness of the sandblasting is 0.32μm; the material used for sandblasting is quartz sand with a particle size of 180 mesh).

[0079] S3. The pan blank processed in step S2 is preheated (the temperature of the preheating treatment is 70℃ and the treatment time is 10 minutes), and then the pan blank is sprayed with a base oil non-stick coating to form a base oil coating with a thickness of 11μm.

[0080] S4. Apply a non-stick coating to the surface of the pan blank treated in step S3 to form a top oil coating. The thickness of the bottom oil coating is 11μm. Dry it at 100℃ for 60 minutes to obtain a non-stick pan.

[0081] The preparation process of the base oil non-stick coating includes mixing 55 parts water, 10 parts glycerin, 2 parts nano iron oxide, 7 parts polytetrafluoroethylene, 5 parts silane coupling agent KH570, 3 parts polymethyl methacrylate, 2 parts sodium dodecylbenzene sulfonate, and 14 parts waterborne hydroxyl acrylic resin by weight. The mixing speed is 1400 rpm and the mixing time is 18 minutes. Then, 1.4 parts lysine diisocyanate are added and mixed to form the base oil non-stick coating.

[0082] The preparation process of the topcoat non-stick coating includes mixing 30 parts water, 0.5 parts nano silicon nitride, silane coupling agent KH570, 1 part sodium dodecylbenzenesulfonate, 2 parts polymethyl methacrylate, 5 parts polytetrafluoroethylene, and 16 parts amino resin at a stirring speed of 1600 rpm for 12 minutes. Then, 2 parts triethylenetetramine are added and mixed to form the topcoat non-stick coating.

[0083] Example 2

[0084] A non-stick pan manufacturing process includes the following steps:

[0085] S1. Silk screen print a predetermined pattern (hexagonal three-dimensional pattern) on the surface of the pan blank (a three-layer steel composite flat blank, with the outer and inner layers made of stainless steel and the middle layer made of aluminum alloy composite), and then dry and cure it (this step is a conventional process in this field).

[0086] S2. Using an etching process, the areas on the surface of the S1 pan blank without screen printing ink are etched (the etching depth is 0.07±0.2mm, and etching is a conventional process in this field), so that the surface of the pan blank is formed with an uneven pattern. After cleaning and drying, it is then stamped, stretched, degreased (380℃ degreased), and sandblasted (the thickness of the sandblasting is 0.32μm; the material used for sandblasting is quartz sand with a particle size of 200 mesh).

[0087] S3. The pan blank processed in step S2 is preheated (the temperature of the preheating treatment is 75℃ and the treatment time is 10 minutes), and then the pan blank is sprayed with a base oil non-stick coating to form a base oil coating with a thickness of 11μm.

[0088] S4. Apply a non-stick coating to the surface of the pan blank treated in step S3 to form a top oil coating. The thickness of the bottom oil coating is 10μm. Dry it at 90℃ for 80 minutes to obtain a non-stick pan.

[0089] The preparation process of the base oil non-stick coating includes mixing 60 parts water, 8 parts glycerin, 2.5 parts nano iron oxide, 7.5 parts polytetrafluoroethylene, 6 parts silane coupling agent KH570, 4 parts polymethyl methacrylate, 2.5 parts sodium dodecylbenzene sulfonate, and 13 parts waterborne hydroxyl acrylic resin by weight. The mixing speed is 1300 rpm and the mixing time is 20 minutes. Then, 1.3 parts lysine diisocyanate are added and mixed to form the base oil non-stick coating.

[0090] The preparation process of the topcoat non-stick coating includes mixing 35 parts water, 0.8 parts nano silicon nitride, silane coupling agent KH570, 1.2 parts sodium dodecylbenzenesulfonate, 2.5 parts polymethyl methacrylate, 6 parts polytetrafluoroethylene, and 15 parts amino resin at a stirring speed of 1600 rpm for 12 minutes. Then, 2 parts triethylenetetramine are added and mixed to form the topcoat non-stick coating.

[0091] Example 3

[0092] A non-stick pan manufacturing process includes the following steps:

[0093] S1. Silk screen print a predetermined pattern (hexagonal three-dimensional pattern) on the surface of the pan blank (a three-layer steel composite flat blank, with the outer and inner layers made of stainless steel and the middle layer made of aluminum alloy composite), and then dry and cure it (this step is a conventional process in this field).

[0094] S2. Using an etching process, the areas on the surface of the S1 pan blank without screen printing ink are etched (the etching depth is 0.07±0.2mm, and etching is a conventional process in this field), so that the surface of the pan blank is formed with an uneven pattern. After cleaning and drying, it is then stamped, stretched, degreased (380℃ degreased), and sandblasted (the thickness of the sandblasting is 0.32μm; the material used for sandblasting is quartz sand with a particle size of 180 mesh).

[0095] S3. The pan blank processed in step S2 is preheated (the temperature of the preheating treatment is 70℃ and the treatment time is 10 minutes), and then the pan blank is sprayed with a base oil non-stick coating to form a base oil coating with a thickness of 11μm.

[0096] S4. Apply a non-stick coating to the surface of the pan blank treated in step S3 to form a top oil coating. The thickness of the bottom oil coating is 11μm. Dry it at 100℃ for 60 minutes to obtain a non-stick pan.

[0097] The preparation process of the base oil non-stick coating includes mixing 55 parts water, 10 parts glycerin, 2 parts nano iron oxide, 7 parts polytetrafluoroethylene, 5 parts silane coupling agent KH570, 3 parts polymethyl methacrylate, 1 part cyclodextrin, 2 parts sodium dodecylbenzene sulfonate, and 14 parts waterborne hydroxyl acrylic resin by weight. The mixing speed is 1400 rpm and the mixing time is 18 minutes. Then, 1.4 parts lysine diisocyanate are added and mixed to form the base oil non-stick coating.

[0098] The preparation process of the topcoat non-stick coating includes mixing 30 parts water, 0.5 parts nano silicon nitride, silane coupling agent KH570, 1 part sodium dodecylbenzenesulfonate, 2 parts polymethyl methacrylate, 5 parts polytetrafluoroethylene, and 16 parts amino resin at a stirring speed of 1600 rpm for 12 minutes. Then, 2 parts triethylenetetramine are added and mixed to form the topcoat non-stick coating.

[0099] Comparative Example 1

[0100] Compared with Example 1, the only difference in Comparative Example 1 is that in the preparation process of the non-stick topcoat, an equal amount of polyethylene glycol is used instead of hydroxyethyl methacrylate in Example 1, while the other components and processes are the same as in Example 1.

[0101] Comparative Example 2

[0102] Compared with Example 1, the only difference in Comparative Example 2 is that in the preparation process of the non-stick topcoat, an equal amount of nano-silicon dioxide is used instead of nano-silicon nitride in Example 1, while the other components and processes are the same as in Example 1.

[0103] Comparative Example 3

[0104] Compared with Example 1, the only difference in Comparative Example 3 is that in the preparation process of the base oil non-stick coating, an equal amount of amino resin is used instead of waterborne hydroxyl acrylic resin, and 1.4 parts of triethylenetetramine are added. The remaining components and processes are the same as in Example 1.

[0105] Product effectiveness test

[0106] The non-stick pans prepared in Examples 1-3 and Comparative Examples 1-3 were used to test the adhesion, abrasion resistance, and impact resistance of the coatings formed on the surface of the non-stick pans. Adhesion was tested according to GB / T9286-1998 standard; abrasion resistance was tested according to GB / T1768-1979 standard. After grinding with a 300g weight for 200 revolutions, the weight loss of the coating was used as the abrasion resistance index; the smaller the weight loss, the better the abrasion resistance; impact resistance was tested according to GB / T1732-93 standard. Specific results are shown in Table 1.

[0107] Table 1

[0108]

[0109]

[0110] As can be seen from Table 1, the coating on the surface of the non-stick pan prepared in the embodiments of the present invention has significantly better adhesion, wear resistance and impact resistance than Comparative Examples 1-2. Compared with Comparative Example 2, the coating of the embodiments has better wear resistance and impact resistance.

[0111] The results from Comparative Example 1 and Example 1 show that when polyethylene glycol is used to replace hydroxyethyl methacrylate in the preparation of the base coat non-stick coating, the bonding strength between the base coat and the top coat decreases, resulting in a significant reduction in the impact resistance of the coating.

[0112] The results from Comparative Example 2 and Example 1 show that replacing nano-silicon nitride with an equal amount of nano-silica in the non-stick coating significantly reduces the wear resistance of the coating. Reduced wear resistance shortens the time that the non-stick pan maintains its non-stick effect and affects the service life of the non-stick pan.

[0113] The results of Comparative Example 3 and Example 1 show that waterborne hydroxy acrylic resin and amino resin need to be used in combination to significantly improve the adhesion and impact resistance of the coating.

[0114] The results from Examples 1 and 3 show that the addition of cyclodextrin can improve the wear resistance and impact resistance of the coating.

[0115] In summary, during the preparation of the base oil non-stick coating and the top oil non-stick coating of the present invention, the components interact with each other, and the base oil coating and the top oil coating cooperate with each other, thereby improving the adhesion, wear resistance and impact resistance of the coating.

[0116] It should be noted that the above embodiments are only some implementation methods of the present invention and do not constitute a limitation on the scope of protection of the present invention. Within the scope of protection of the present invention, appropriate changes to process parameters or component dosages can also achieve similar effects to Embodiment 1.

Claims

1. A non-stick pan manufacturing process, characterized in that, Includes the following steps: S1. Silk screen print the ink with the predetermined pattern onto the surface of the pot plate blank, and then dry and cure it; S2. Using an etching process, the areas on the surface of the S1 pan blank without screen printing ink are etched to create a raised pattern on the surface of the pan blank. After cleaning and drying, the pan blank is then stamped, stretched, degreased, and sandblasted. S3. The pan blank processed in step S2 is preheated, cooled, and then coated with a non-stick base oil coating to form a base oil coating. S4. Spray a non-stick topcoat onto the base oil coating to form a top oil coating, and dry it to obtain the non-stick pan. The preparation process of the base oil non-stick coating includes, by weight, mixing 50-70 parts water, 4-15 parts glycerin, 0.5-3.5 parts nano iron oxide, 5-16 parts polytetrafluoroethylene, 1-10 parts silane coupling agent, 1-12 parts polymethyl methacrylate, 1-10 parts sodium dodecylbenzene sulfonate, and 5-15 parts waterborne hydroxyl acrylic resin, and then adding 0.5-5 parts lysine diisocyanate to form the base oil non-stick coating; The preparation process of the non-stick topcoat includes: 20-40 parts water, 0.1-2 parts nano silicon nitride, silane coupling agent, 1-5 parts sodium dodecylbenzenesulfonate, 1-5 parts polymethyl methacrylate, 5-10 parts polytetrafluoroethylene, and 5-20 parts amino resin are stirred and mixed, and then 1-6 parts triethylenetetramine are added and mixed to form a non-stick topcoat. The non-stick pan has a raised and recessed pattern on its inner surface that forms multiple heating zones. The heating zones include a first zone, a second zone, and a third zone located between the first zone and the second zone. The first zone has multiple parallel first ribs, the second zone has multiple parallel second ribs, and the third zone has multiple parallel third ribs. The first ribs and the second ribs are arranged parallel to each other, and the first ribs and the third ribs are arranged at an angle.

2. The non-stick pan manufacturing process according to claim 1, characterized in that, Cyclodextrin is also added during the preparation of the base oil non-stick coating.

3. The non-stick pan manufacturing process according to claim 2, characterized in that, The preparation process of the base oil non-stick coating includes, by weight, mixing 55-65 parts water, 8-15 parts glycerin, 1-3 parts nano iron oxide, 6-15 parts polytetrafluoroethylene, 1-9 parts silane coupling agent, 3-10 parts polymethyl methacrylate, 0.5-5 parts cyclodextrin, 1-5 parts sodium dodecylbenzenesulfonate, and 8-15 parts waterborne hydroxyl acrylic resin, then adding 0.5-2.5 parts lysine diisocyanate and mixing to form the base oil non-stick coating.

4. The non-stick pan manufacturing process according to claim 2, characterized in that, Both the base coat and the top coat contain defoamers.

5. The non-stick pan manufacturing process according to claim 1, characterized in that, The stirring speed is 800-2000 rpm, and the stirring time is 5-30 minutes; and / or, the stirring temperature is 15-30℃.

6. The non-stick pan manufacturing process according to claim 1, characterized in that, The base oil non-stick coating also includes pigments.

7. The non-stick pan manufacturing process according to claim 1, characterized in that, In step S3, the base coat non-stick coating is sprayed to form a base coat thickness of 10-25 μm; and / or, in step S4, the top coat non-stick coating is sprayed to form a top coat thickness of 5-11 μm; and / or, in step S4, the drying temperature is 80-120℃ and the drying time is 40-120 minutes.

8. A non-stick pan, characterized in that, It is prepared by the non-stick pan manufacturing process described in any one of claims 1-7.

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