TW202307151A - Environment-friendly composite wax paint preparation method - Google Patents

Abstract

An environmentally friendly composite wax coating, which contains 40%-50% wax base material, 1%-3% weight percentage of environmentally friendly solvents, and 6%-7% weight percentage of oily substances., And the weight percentage of powdery substances is 35%~40%. It is mainly based on natural plants and non-toxic materials, and then blended with powdered substances and extracted vegetable oils. It is gentle and does not harm the human body and has environmental protection functions. After application, it has the effects of heat insulation, dustproof, water repellent and brightening.

Description

Environment-friendly composite wax paint and preparation method thereof

The invention relates to wax coatings, in particular to a preparation method of an environmentally friendly composite wax coating with heat insulation, dustproof, water-splashing, non-irritating to human body and non-toxicity.

Wax coatings are widely used in daily life, such as protective waxes for paint surfaces of automobiles and motorcycles, wooden floors, surfaces of 3C products, plates and steel, etc. At present, most of the general car waxes are palm wax or synthetic waxes, and kerosene needs to be added, which is a class of light petroleum products with chemical substances. It is obtained by fractionation or cracking of natural petroleum or artificial petroleum, or turpentine is extracted from the resin of coniferous plants by distillation or other methods, and is used as a lubricating wax.

Because during the use of automobile wax, if kerosene solvent or turpentine is added, volatile organic compounds will be produced, and its strong smell is very pungent, especially inhaling it is harmful to human health and it is easy to produce irritation when it comes into contact with the skin, causing harm to the human body. Therefore, the addition of irritating solvents to general car waxes is mainly due to the desired effect of waxing. However, in order not to hurt the human body and save costs, it is nothing more than to reduce the proportion of kerosene or turpentine solvents added, or to find other alternatives that are easy to dissolve. solvent. However, the use of environmentally friendly solvents is very rare, and with the increasing awareness of environmental protection, the use of environmentally friendly products that do not harm the human body should be given priority, which should be a future trend.

Yes, the present invention is mainly based on plant-based and non-toxic materials, supplemented by environmentally friendly solvents, and uses natural wax species as the base, and then blends with powdery substances and extracted vegetable oils to achieve heat insulation, dust prevention, and anti-corrosion. Water-repellent, bright effect and no harm to human health as the main appeal of the wax paint.

Therefore, the main purpose of the present invention is to provide a kind of wax coating which is harmless to human health and has heat insulation, dustproof, water-repellent and bright effects and does not harm human body and its preparation method.

Another object of the present invention is to provide a method that can be applied to the cleaned automobile sheet metal without wiping off the water stains on the surface of the automobile sheet metal, which saves time and trouble.

In order to achieve the above-mentioned purpose, the present invention discloses an environmentally friendly composite wax coating, which comprises a wax base material, the weight percentage of the wax base material is 40%~60%; an environmentally friendly solvent, the weight percentage of the environmentally friendly solvent is 1%~3%; an oily substance, the weight percentage of the oily substance is 6%~7%; and a powdery substance; the weight percentage of the powdery substance is 35%~40%.

Wherein, the composition of the wax base material includes a carnauba wax (Carnauba Wax), a kandelilla wax (Candelilla Wax), a laurel wax (Myrica Pubescens Fruit Wax), a honey wax (Amber Wax), a beeswax ( Beeswax), Sodium Cocoyl Alaninate, Polyethylene Wax, Grapeseed Oil, Inca Omega Oil, Coconut Oil (Coconut Oil), a glycerol (Glycerol), a nano-cobalt oxide (Nano-Coalt Oxide), a nano-zinc oxide (Nano-Zinc Oxide), a nano-ceramic powder silicon carbide (Nano-Coalt Oxide) Rice silicon carbide, Nano-Silicon Carbide), a calcium carbonate (Calcium carbonate), a UV absorber (UV agent) and more than one of the ingredients.

The present invention further discloses a method for preparing an environmentally friendly composite wax paint, which includes the following steps:

Step S100: taking at least one natural wax material, crushing and grinding, and mixing to obtain a wax base material;

Step S110: Stir the aforementioned wax base material at a temperature of 86°C to 100°C to make it into a liquid state;

Step S120: adding 2% to 25% of at least one oily substance to the wax base, heating at a temperature of 100°C to 110°C, and stirring to dissolve in the wax base to form a first filler;

Step 130: Heat 1%~6% of glycerol to a temperature of 100°C and stir, then add the silty mixture, the silty mixture contains 10% nano-cobalt oxide (Nano-Cobalt Oxide), nano-zinc oxide (Nano-Cobalt Oxide) -Zinc Oxide) 10%, nano-ceramic powder silicon carbide (nano-silicon carbide, Nano-Silicon Carbide) 5%, calcium carbonate (Calcium carbonate) 5%, heat and stir to form the second filler.

Step 140: Pour the second filler into the first filler, stir and fuse at a temperature of 100°C, when the temperature drops to 70°C~80°C, reduce the stirring speed, mix evenly, cool to 28°C~35°C, and form In solid state, a wax product coating is obtained.

Wherein, in step 100, the natural wax material is selected from carnauba wax 10%~22%, Candelilla Wax (Candelilla Wax) 4%~9%, laurel wax (Myrcia Pubescens Fruit Wax) 3%~9% %, Amber Wax 2%~8%, Beeswax 2%~20%.

Wherein, in step 120, the oily substance is selected from sodium cocoyl alaninate (Sodium Cocoyl Alaninate) 6%~10%, polyethylene wax (Polyethylene Wax) 4%~16%, grape seed oil 2% %~25%, and 2%~15% of environment-friendly solvent can be added.

Wherein, in step 130, 2%-9% of Inca Omega Oil and 2%-9% of Coconut Oil may be added.

Wherein, in step S130, the Inca Omega Oil 9%, Coconut Oil 9%, and Glycerol 1% were stirred at a stirring speed of 800 rpm.

Wherein, in step S110, stirring is performed at a stirring speed of 800 rpm to 1200 rpm for eight to twelve minutes.

Wherein, in step S120, it is stirred at a stirring speed of 1400 rpm to 1500 rpm.

Wherein, in step S140, the second filler is poured into the first filler, first stirred at a stirring speed of 1000 rpm, and when the temperature drops to 70° C. to 80° C., the stirring speed is reduced to 600 rpm and stirred.

In this way, the present invention can be applied to corrugated boards and iron plates such as coating on automobile sheet metal, which can make the automobile sheet metal achieve heat insulation, dustproof, water-repellent and brightening effects, and because the present invention is mainly based on plant-based and non-toxic materials, Supplemented by environmentally friendly solvents and natural wax as the base, it is then blended with powdery substances and extracted vegetable oils. It does not harm the human body and has a mild texture. It can be applied to objects such as car sheet metal with bare hands.

It is worth mentioning that after washing the car with water, the wax paint of the present invention can be applied to the surface of the car sheet metal without wiping off the water stains on the car sheet metal, which saves time and trouble. convenience.

The present invention has at least the following advantages:

1. The use of the present invention is harmless and safe to the human body, and has an environmental protection function.

2. After washing the automobile sheet metal, the wax paint of the present invention can be used to smear the surface of the automobile sheet metal without wiping off the water stains on the automobile sheet metal, which has the advantages of saving time and effort and being easy to use.

3. The present invention can achieve heat insulation, anti-ultraviolet, dust-proof, anti-splashing water, corrosion resistance, oxidation resistance and bright light effect when applied on automobile sheet metal.

4. The production material of the present invention is easy to obtain and is a plant-based environmentally friendly base material, which meets the international low-toxicity standard.

S100~S140; S200~S240; S300~S340; S400~S440: Steps in the preparation method of environmentally friendly composite wax paint

Fig. 1 is a flow chart of the first embodiment of the present invention.

Fig. 2 is a flow chart of the second embodiment of the present invention.

Fig. 3 is a flow chart of the third embodiment of the present invention.

Fig. 4 is a flow chart of the fourth embodiment of the present invention.

The detailed content and technical description of the present invention are now further described with examples, but it should be understood that these examples are for illustrative purposes only, and should not be construed as limitations on the implementation of the present invention.

The environment-friendly composite wax paint of the present invention comprises a wax base material, the weight percentage of the wax base material is 40%~60%; an environment-friendly solvent, the weight percentage of the environment-friendly solvent is 1%~3%; Oily substance, the weight percentage of the oily substance is 6%~7%; and a powder Substances; the percentage by weight of the powdery substances is 35% to 40%.

And the composition of described wax base material, comprises a carnauba wax (Carnauba Wax), a survey ground lila wax (Candelilla Wax), a laurel wax (Myrica Pubescens Fruit Wax), a secret wax (Amber Wax), a beeswax (Beeswax), 1 Sodium Cocoyl Alaninate, 1 Polyethylene Wax, 1 Grapeseed Oil, 1 Inca Omega Oil, 1 Coconut Coconut Oil, Glycerol, Nano-Coalt Oxide, Nano-Zinc Oxide, Nano-Silicon Ceramic Powder Carbide), one calcium carbonate (Calcium Carbonate), one ultraviolet absorber (UV agent) and other ingredients.

Among them, the carnauba wax (Carnauba Wax) is a monoester vegetable wax, which can be obtained by drying palm. 10%~16%, acid 3%~6%, hydrocarbon 1%~3%. It contains about 20% esterified fatty diol, 10% methoxylated or hydroxylated cinnamic acid and 6% hydroxylated fatty acid. Its melting point is about 82 ° C ~ 86 ° C, which is the highest wax content in natural wax species.

The Candelilla Wax is a monolipid vegetable wax, its main components are hydrocarbons, higher fatty acids and waxes of higher hydroxyl alcohols, free fatty acids, etc. It is soluble in oil and wax, and its melting point is 65%~70%, saponification value 43~65mgkOH/g.

The laurel wax (Myrica Pubescens Fruit Wax) is a vegetable wax obtained from Myrtaceae plants. This wax is extracted from water, with a melting point of 45°C~55°C. wax.

The beeswax (Amber Wax), an organic mineral, is produced by bee insects The wax secreted by worker bees of Apis mellifera has a melting point of 76°C to 82°C.

The beeswax is the secretion of four pairs of wax glands owned by worker bees. The melting point of beeswax is between 62°C and 64°C.

The sodium cocoyl alaninate (Sodium Cocoyl Alaninate), also known as the natural substance derivative fatty acyl, is a white solid and has excellent detergency, emulsification, dispersion, wetting, penetration, etc. properties.

The polyethylene wax (Polyethylene Wax) is an additive that can be directly added to the synthesis process. Its melting point is 90°C to 120°C. As polycarbonate, it has stable chemical properties and good electrical properties.

The main components of the grapeseed oil are linoleic acid and proanthocyanidins, and the content of linoleic acid is more than 70%. Linoleic acid is an essential fatty acid that cannot be synthesized by the human body.

The Inca Omega Oil is a natural oil extracted from plant seeds, mainly containing 33% protein, 49% oil, rich in vitamin A, vitamin E, and some trace elements.

The coconut oil (Coconut Oil) is an edible oil extracted from ripe coconut pulp. Coconut oil has the characteristics of heat stability, slow oxidation and resistance to rancidity.

This glycerol (Glycerol), has another name called glycerin, reclaims from the by-product of making soap from animal and plant fat, and its natural oil is still the main raw material of producing glycerol.

The nano-cobalt oxide (Nano-Coalt Oxide) is ultra-fine cobalt powder through a special process, the particle size distribution range is narrow, the size is controllable, it is soluble in acid, and it is easy to oxidize in humid air.

The nano-zinc oxide (Nano-Zinc Oxide), its light weight, specific surface area More than 80*60m2/g, light color and strong absorbing ability, it is a multi-functional inorganic absorbing material.

The nano ceramic powder silicon carbide (Nano-Silicon Carbide) is gray-green in color, with a purity of >99.6%, an average particle size of 50nm, and a specific surface area of 60m ² /g. It has good microwave absorption, light weight, and chemical stability.

The calcium carbonate (Calcium Carbonate), used in coatings, has a steric hindrance effect and can partially replace titanium dioxide to reduce production costs. In the wax film, it plays an anti-sedimentation role. After wax production, the whiteness of the wax film increases and the glossiness High, can reduce the amount of dispersant added.

The ultraviolet absorber (UV agent) is mainly divided into benzotriazoles, benzophenones and triazines. Adding an appropriate amount of ultraviolet absorbers to plastics or coatings can filter out harmful ultraviolet rays. , Delay the speed of product aging.

The preparation method of the environment-friendly composite wax paint of the present invention comprises preparing a first filler, a second filler and pouring the second filler into the first filler and mixing them evenly.

Please refer to FIG. 1 , which is a flowchart of the first embodiment of the present invention. It consists of the following steps:

Step S100: Add at least one natural wax such as 20% Carnauba Wax, 4% Candelilla Wax, 4% Myrica Pubescens Fruit Wax, and Amber Wax 2%, beeswax (Beeswax) 2% were crushed and ground to obtain the wax base.

Step S110: Crushing and grinding the wax base material, heating to 90° C., and stirring at a stirring speed of 800 rpm to 900 rpm for about ten minutes to form a liquid state.

Step S120: add oily substances such as sodium cocoyl alaninate (Sodium Cocoyl Alaninate) 6%, polyethylene wax (Polyethylene Wax) 6%, grape seed oil (Grape Seed Oil) 6%, heated at 100°C~110°C, and stirred at a stirring speed of 1400rpm~1500rpm to make Sodium Cocoyl Alaninate (Sodium Cocoyl Alaninate), Polyethylene Wax (Polyethylene Wax), Grape Seed Oil ( Grape Seed Oil) was dissolved in the wax base material, and 3% of an environmentally friendly solvent was added to make the wax and the ester melt together to form the first filler.

Step S130: Mix 9% Inca Omega Oil, 9% Coconut Oil, and 1% Glycerol, heat at 100°C and stir at a stirring speed of 800rpm, and then Add nano-cobalt oxide (Nano-Cobalt Oxide) 4%, nano-zinc oxide (Nano-Zinc Oxide) 4%, nano-ceramic powder silicon carbide (nano-silicon carbide, Nano-Silicon Carbide) 5%, calcium carbonate (Calcium carbonate) 10%, heat and stir to form the second filler.

Step S140: Pour the second filler into the first filler, stir and fuse at a temperature of 100°C and a stirring speed of 1000rpm, then drop the temperature to 70°C~80°C, reduce the stirring speed to 600rpm, and add an ultraviolet absorber (UV Agent) 5% mixed evenly, cooled to 28 ℃ -35 ℃, after forming a solid state, a wax coating was obtained.

Please refer to FIG. 2 , which is a flowchart of a second embodiment of the present invention. It consists of the following steps:

Step S200: Add at least one natural wax such as Carnauba Wax 10%, Candelilla Wax 9%, Myrica Pubescens Fruit Wax 3%, Amber Wax 8% %, Beeswax (Beeswax) 20% are crushed and ground to obtain the wax base.

Step S210: Crushing and grinding the wax base material, heating to 86.2° C. and stirring at a stirring speed of 1000 rpm to 1200 rpm for about eight minutes to form a liquid state.

Step S220: Add oily substances such as Sodium Cocoyl Alaninate 2%, Polyethylene Wax 4%, Grapeseed Oil 2%, and heat at 100°C~110°C , and stir at a stirring speed of 1400rpm~1500rpm, so that sodium cocoyl alaninate (Sodium Cocoyl Alaninate), polyethylene wax (Polyethylene Wax), grape seed oil (Grape Seed Oil) are dissolved in the wax base material, with A first filler is formed.

Step S230: Mix 8% Inca Omega Oil, 9% Coconut Oil and 1% Glycerol, heat at 100°C and stir at a stirring speed of 800rpm , then add 4% of Nano-Cobalt Oxide, 4% of Nano-Zinc Oxide, 4% of Nano-ceramic powder SiC (Nano-Silicon Carbide), Calcium carbonate (Calcium carbonate) 9%, heat and stir to form the second filler.

Step S240: Pour the second filler into the first filler, stir and fuse at a temperature of 100°C and a stirring speed of 1000rpm, then drop the temperature to 70°C~80°C, reduce the stirring speed to 600rpm, and add an ultraviolet absorber (UV agent )3% mixed evenly, cooled to 28 ℃ ~ 35 ℃, after forming a solid state, a wax coating was obtained.

Please refer to FIG. 3 , which is a flowchart of a third embodiment of the present invention. It consists of the following steps:

Step S300: Add at least one natural wax such as 10% Carnauba Wax, 5% Candelilla Wax, 9% Myrica Pubescens Fruit Wax, and Amber Wax 9%, Beeswax (Beeswax) 2% are crushed and ground to obtain the wax base.

S310: Crushing and grinding the wax base material, stirring at a temperature of 100° C. and a stirring speed of 800 rpm to 900 rpm for about 12 minutes to form a liquid state.

Step S320: Add oily substances such as Sodium Cocoyl Alaninate (Sodium Cocoyl Alaninate) 10%, Polyethylene Wax (Polyethylene Wax) 16%, Grape Seed Oil (Grape Seed Oil) 2%, at 100 ° C ~ 110 ° C Heating and stirring at a stirring speed of 1400rpm to 1500rpm, so that sodium cocoyl alaninate (Sodium Cocoyl Alaninate), polyethylene wax (Polyethylene Wax), and grape seed oil (Grape Seed Oil) are dissolved in the wax base material, Add 15% of environment-friendly solvent to dissolve wax and ester to form the first filler.

Step S330: Mix Inca Omega Oil 2%, Coconut Oil 2%, Glycerol 6%, heat at 100°C and stir at 800rpm, then add Nano-cobalt oxide (Nano-Cobalt Oxide) 10%, nano-zinc oxide (Nano-Zinc Oxide) 4%, nano-ceramic powder silicon carbide (nano-silicon carbide, Nano-Silicon Carbide) 5%, calcium carbonate ( Calcium Carbonate) 2%, heat and stir to form the second filler.

Step S340: Pour the second filler into the first filler, stir and fuse at a temperature of 100°C and a stirring speed of 1000rpm, then drop the temperature to 70°C~80°C, reduce the stirring speed to 600rpm, and add an ultraviolet absorber (UV Agent) 6% mixed evenly, cooled to 28 ℃ -35 ℃, after forming a solid state, a wax coating was obtained.

Please refer to FIG. 4 , which is a flowchart of a fourth embodiment of the present invention. It consists of the following steps:

Step S400: pulverize at least one natural wax such as 22% Carnauba Wax and 9% Candelilla Wax and grind to obtain a wax base.

Step S410: Crushing and grinding the wax base material, heating to 88.4° C., and stirring at a stirring speed of 1000 rpm to 1100 rpm for about ten minutes to form a liquid state.

Step S420: Add oily substances such as grapeseed oil (Grapeseed Oil) 25%, heat at 100°C~110°C, and stir at a stirring speed of 1400rpm~1500rpm to dissolve in the wax base material, and then add environmentally friendly Solvent 2%, so that the wax and ester dissolve each other to form the first filler.

Step S430: Heat 2% of glycerol at 100°C and stir at 800 rpm, then add 10% of nano-cobalt oxide (Nano-Cobalt Oxide) and 10% of nano-zinc oxide (Nano-Zinc Oxide) %, nano-ceramic powder silicon carbide (nano-silicon carbide, Nano-Silicon Carbide) 5%, calcium carbonate (Calcium Carbonate) 15%, heat and stir to form the second filler.

Step S440: Pour the second filler into the first filler, stir and fuse at a temperature of 100°C and a stirring speed of 1000rpm, then drop the temperature to 70°C~80°C, reduce the stirring speed to 600rpm, mix well, and cool to 28 ℃ ~ 35 ℃, after forming a solid state, a wax coating is obtained.

Because the wax paint of the present invention is mainly based on natural vegetable and non-toxic materials, supplemented by environmentally friendly solvents, and based on natural wax species, and then blended with powdery substances and extracted vegetable oils, it can be used for corrugated boards and iron boards such as smearing On the automobile sheet metal, the automobile sheet metal can achieve the effects of heat insulation, dustproof, water-splashing and brightness, and because the invention does not hurt the human body, it has a mild texture and can be applied on articles such as automobile sheet metal with bare hands.

It is worth mentioning that after washing the car with water, the wax coating of the present invention can be applied to the surface of the car sheet metal without wiping off the water on the car sheet metal, which saves time and trouble. Convenience.

The present invention has at least the following advantages:

1. The use of the present invention is harmless and safe to the human body, and has an environmental protection function.

2. After washing the automobile sheet metal, the wax paint of the present invention can be used to smear the surface of the automobile sheet metal without wiping off the water stains on the automobile sheet metal, which has the advantages of saving time and effort and being easy to use.

3. The present invention can achieve heat insulation, anti-ultraviolet, dust-proof, anti-splashing, anti-corrosion, anti-oxidation and bright light effect when applied on automobile sheet metal.

4. The production material of the present invention is easy to obtain and is a plant-based environmentally friendly base material, which meets the international low-toxicity standard.

But what is described above is only a preferred embodiment of the present invention, and should not limit the scope of implementation of the present invention with this, that is, all simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the description of the invention, All still belong to the scope covered by the patent of the present invention.

S100~S140: the steps of the preparation method of environmental protection composite wax paint

Claims (10)

An environment-friendly composite wax paint, which comprises a wax base material, the weight percentage of the wax base material is 40%~60%; an environment-friendly solvent, the weight percentage of the environment-friendly solvent is 1%~3%; an oil A substance, the weight percentage of the oily substance is 6%~7%; and a powdery substance; the weight percentage of the powdery substance is 35%~40%. The environmental protection composite wax product coating as described in claim item 1, wherein, the composition of this wax base material comprises a carnauba wax (Carnauba Wax), a survey ground lila wax (Candelilla Wax), a laurel wax (Myrica Pubescens Fruit Wax), Amber Wax, Beeswax, Sodium Cocoyl Alaninate, Myrica Pubescens Fruit Wax, Grapeseed Oil, 1 Inca Omega Oil, 1 Coconut Oil, 1 Glycerol, 1 Nano-Cobalt Oxide, 1 Nano-Zinc Oxide ), a nano-ceramic powder silicon carbide (Nano-Silicon Carbide), a calcium carbonate (Calcium Carbonate), and a UV absorber (UV agent). A preparation method of an environment-friendly composite wax paint, which comprises the following steps: Step S100: taking at least one natural wax material, crushing and grinding, and mixing to obtain a wax base material; Step S110: Stir the aforementioned wax base material at a temperature of 86°C to 100°C to make it into a liquid state; Step S120: adding 2% to 25% of at least one oily substance to the wax base, heating at a temperature of 100°C to 110°C, and stirring to dissolve in the wax base to form a first filler; Step 130: Heat 1%~6% of glycerol (Glycerol) to a temperature of 100°C and stir, then add the silty mixture, which contains 10% nano-cobalt oxide (Nano-Cobalt Oxide), nano-cobalt oxide Zinc (Nano-Zinc Oxide) 10%, nano-ceramic powder silicon carbide (nano-silicon carbide, Nano-Silicon Carbide) 5%, calcium carbonate (Calcium carbonate) 5%, heat and stir to form the second filler ; Step 140: Pour the second filler into the first filler, stir and fuse at a temperature of 100°C, when the temperature drops to 70°C~80°C, reduce the stirring speed, mix evenly, cool to 28°C~35°C, and form In solid state, a wax product coating is obtained. The preparation method of the environmental protection composite wax product coating as described in claim 3, wherein, in step 100, the natural wax material is selected from carnauba wax 10% ~ 22%, Kandi Lila wax (Candelilla Wax) 4 %~9%, Myrcia Pubescens Fruit Wax 3%~9%, Amber Wax 2%~8%, Beeswax 2%~20%. The preparation method of the environmental protection composite wax product coating as described in claim item 3, wherein, in step 120, the oily substance is selected from cocoacyl alanine sodium (Sodium Cocoyl Alaninate) 6% ~ 10%, 4%~16% Polyethylene Wax, 2%~25% Grape Seed Oil, and 2%~15% environmentally friendly solvent can be added. The preparation method of the environmentally friendly composite wax coating as described in claim 3, wherein, in step 130, 2%~9% of Inca Omega Oil and 2% of Coconut Oil can be added ~9%. The preparation method of the environment-friendly composite wax product coating as described in claim 6, wherein, in step S130, it is 800rpm to stir the Inca Omega Oil (Inca Omega Oil) 9%, Coconut Oil (Coconut Oil) with a stirring speed of 800rpm ) 9%, glycerol (Glycerol) 1%. The preparation method of the environment-friendly composite wax coating according to claim 3, wherein, in step S110, stirring is performed at a stirring speed of 800rpm-1200rpm for eight to twelve minutes. The preparation method of the environment-friendly composite wax coating according to claim 3, wherein, in step S120, the stirring speed is 1400rpm~1500rpm. The preparation method of the environmentally friendly composite wax coating as described in claim 3, wherein, in step S140, the second filler is poured into the first filler, first stirred at a stirring speed of 1000rpm, and the temperature drops to 70°C~ 80°C, the stirring speed was reduced to 600rpm stirring.

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