KR20230011966A - Non-slip powder paint and its manufacturing method and spray coating process - Google Patents

Abstract

The present invention relates to the field of production of polymer materials and spray coating, and in detail, anti-slip powder paint is disclosed; It is composed of roughing powder and finishing powder; The raw powder is composed of the following raw materials and weight percentages, the epoxy resin is 50.0 to 65.0%, the curing agent is 2.5 to 17.0%, the modified TPU resin is 10.0 to 20.0%, and the sand texture agent is 0.5% to 1.0%, benzoic acid is 0.1 to 0.3%, pigment is 3.0 to 25.0%, and filler is 0 to 27.0%; The sum of these percentages equals 100%; The finishing powder is composed of the following raw materials and weight percentages, TPU resin is 60 to 90%, nano-silicon dioxide is 0.5% to 1.0%, water is 1.0 to 5.0%, 3.0 to 25.0% of pigment and 0 to 26.0% of filler; The sum of these percentages equals 100%. The present invention further provides a method for producing anti-slip powder paint and a spray coating process; The anti-slip powder paint of the present invention can be applied to various environments such as dry and humid, has excellent anti-slip effect, and has strong practicality.

Description

Non-slip powder paint and its manufacturing method and spray coating process

The present invention relates to the field of manufacturing polymer materials and spray coating, and in particular, to anti-slip powder paint, a manufacturing method thereof, and a spray coating process.

In the daily life of users and industrial production, the friction coefficient of the surface of an object is lowered under a humid environment, and users or objects easily slide. In addition, for example, if an item is placed around a washbasin, the item can easily slip and fall, causing property damage, and again, for example, the flooring in a public toilet is wet and slippery, so it is easy to fall and endanger the health of users. apply

Currently, a method of improving the anti-slip performance of the coating layer has appeared in the market. For example, the anti-slip powder paint and its online coating method described in patent CN110982376A improve the anti-slip ability of the coating layer through the principle of increasing the roughness of the surface of the coating layer. improves; In addition, for example, the SiC fiber-reinforced polyurethane-based anti-slip paint described in CN104710926A and the manufacturing method improve the anti-slip ability of the coating layer by improving the friction coefficient of the surface of the coating layer.

However, the anti-slip principle has some disadvantages in a humid environment. For example, a large amount of water significantly lowers the coefficient of friction so that the anti-slip performance of the coating layer loses its effectiveness.

An object of the present invention is to provide a powder paint, a manufacturing method thereof, and a spray coating process capable of providing excellent anti-slip performance in both dry and wet environments, with reliable practicability.

In order to achieve the above object, the present invention uses the following technical solutions. The anti-skid powder paint is composed of roughing powder and finishing powder; The rough powder is composed of raw materials according to the following weight percentages, the epoxy resin is 50.0 to 65.0%, the curing agent is 2.5 to 17.0%, the modified TPU resin is 10.0 to 20.0%, and the sand texture agent is 0.5% to 1.0%, benzoic acid is 0.1 to 0.3%, and the pigment is 3.0 to 25.0%, and 0 to 27.0% of filler; The sum of these percentages equals 100%; The finished powder is composed of raw materials according to the following weight percentages, TPU resin is 60 to 90%, nano-silicon dioxide is 0.5% to 1.0%, water is 1.0 to 5.0%, 3.0 to 25.0% of pigment and 0 to 26.0% of filler; The sum of these percentages equals 100%.

The present invention further provides a manufacturing method for producing the anti-slip powder paint, which includes the following steps.

(1) For the raw powder, the raw materials are weighed and taken according to the percentage of the formula; Waiting for the twin-screw extruder to raise the temperature to a preset first temperature value, melt extrusion, cooling tabletting, primary crushing, and ACM abrasive grinding are performed, and the coarse powder having an average particle diameter of 25 to 45 μm is graded. obtain; (2) For the finished powder, raw materials are weighed and taken according to the percentage of the blending method, and the single screw extruder waits for the temperature to rise to a preset second temperature value to proceed with melt extrusion, cooling refining, and water cooling coarsening; ACM abrasive grinding is performed under a preset third temperature value, and graded to obtain a powder of a finishing powder having an average particle diameter of 15 to 20 μm.

The present invention further provides a spray coating process for applying the anti-slip powder paint, which includes the following steps.

(1) on the surface of the treated metal substrate, spray-coating the rough powder by electrostatic spray coating; (2) on the basis of step (1), by using the electrostatic spray coating method, spray coating the finishing powder to stand by; (3) Repeat the above steps (1) and (2) to proceed with spray coating again; (4) put the substrate subjected to two spray coatings in an oven at 200° C. to 220° C. and bake for 15 to 20 minutes to obtain a coating layer of anti-slip powder; During the standing process, the spray-coated surface of the metal substrate is installed parallel to the horizontal ground.

Compared to the anti-slip powder paint according to the prior art, the present invention,

1. When 1 to 5% of water is added to the formulation of the finishing powder and the powder paint is baked, the moisture volatilizes and the finishing powder layer of the coating layer becomes loose, resulting in multiple holes, and in addition, the spray coating surface when baking The surface and the ground are placed parallel to each other, and the protruding columnar coating layer grows perpendicular to the substrate by using the characteristic of TPU resin to soften when gravity and high temperature act. In the process of using the coating layer, the protruding columnar shape and elasticity of the TPU material provide excellent anti-slip performance in a dry environment, and capillary phenomenon occurs on the surface of the coating layer of the elastic finishing powder, which is loosened in a humid environment and has multiple holes, resulting in a large amount of When a liquid is absorbed and a human body or object applies force to the coating layer, the coating layer receives pressure and discharges the absorbed liquid to generate a local pressure difference, and firmly absorbs the applied force to the human body or object to realize a non-slip role. and;

2. Nano-silicon dioxide in the finishing powder formulation method according to the present invention serves to help the dispersion of the pigment and the TPU resin, and above all, helps the TPU resin to absorb and lock the water in the formulation method, raw material Helps form a loose and porous coating layer by reducing volatilization of moisture in the process of being extruded;

3. The rough powder according to the present invention applies an epoxy resin system and uses its excellent anti-corrosion performance to compensate for the defect of not being able to completely protect the substrate when the finished powder is loose and a large number of holes are formed when directly painted on the substrate , At the same time, sand texture agent is added to increase the roughness of the roughness of the rough powder, furthermore, the contact area of the finished powder is increased, and furthermore, the compatibility of the rough powder and the finished powder is increased by adding a modified TPU resin to prevent peeling of the finishing powder layer due to long-term use of the coating layer;

4. The powder manufacturing process matched to the set in the present invention is based on the unique design of the blending method. TPU resin has a higher melting point and higher viscosity than epoxy resin, and when compounding is performed by extruding the rough powder, a twin-screw extruder must be used Since must be used, the compounding effect is better; The blending method of the finishing powder requires a higher temperature due to the high content of TPU resin, and when extruded, a single screw extruder should be used to provide better dispersion, but when ground into powder, it is below the brittle temperature of the TPU resin. It can be pulverized only at, pulverized using liquid nitrogen and divided into grades to provide cryogenic pulverization at minus 40 to 100 ° C.

5. The powder paint of the finishing powder designed by the present invention has an average particle diameter of 15 to 20 μm, and when the powder is baked, a relatively fine columnar coating layer may be formed and capillarity may occur;

6. In the painting process matched with a set according to the present invention, a columnar coating layer is formed by coating twice, baking once, and using a baking method in which the spray coated surface is parallel to the ground.

Hereinafter, the present invention will be described in more detail by combining drawings and specific embodiments.
1 is a manufacturing process roadmap of an anti-slip powder paint according to the present invention.

Hereinafter, the technical solutions of the embodiments according to the present invention will be clearly and comprehensively described. Of course, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art on the premise that they do not carry out inventive labor fall within the scope of the present invention.

Although the following description has set forth numerous details in order to provide a thorough understanding of the present invention, the present invention may be practiced in other ways than those described herein, and those skilled in the art will be able to understand the meaning of the present invention. Similar dissemination can proceed under circumstances that do not violate the above, and therefore, the present invention is not limited by the specific embodiments disclosed below.

The anti-slip powder paint of the present invention can be applied in various environments such as dry and wet; The anti-skid powder paint is composed of roughing powder and finishing powder; The crude powder is composed of raw materials according to the weight percentage below,

Epoxy resin: 50.0 to 65.0%;

curing agent: 2.5 to 17.0%;

modified TPU resin: 10.0 to 20.0%;

Sand texture agent: 0.5% to 1.0%;

Benzoic acid: 0.1 to 0.3%;

Pigment: 3.0 to 25.0%;

filler: 0 to 27.0%;

The sum of the percentages is 100%,

The finishing powder is composed of raw materials according to the weight percentage below,

TPU resin: 60 to 90%;

nano-silicon dioxide: 0.5% to 1.0%;

Water: 1.0 to 5.0%;

Pigment: 3.0 to 25.0%;

filler: 0 to 26.0%;

The sum of these percentages equals 100%.

1 shows a manufacturing process roadmap of anti-slip powder paint according to the present invention; In the present invention, the manufacturing method of the non-slip powder paint includes the following steps.

(1) For the raw powder, the raw materials are weighed and taken according to the percentage of the formula; Waiting for the twin-screw extruder to raise the temperature to a preset first temperature value, melt extrusion, cooling tabletting, primary crushing, and ACM abrasive grinding are performed, and the coarse powder having an average particle diameter of 25 to 45 μm is graded. obtaining;

(2) For the finished powder, raw materials are weighed and taken according to the percentage of the blending method, and the single screw extruder waits for the temperature to rise to a preset second temperature value to proceed with melt extrusion, cooling refining, and water cooling coarsening; This is a step of performing ACM abrasive grinding under a preset third temperature value, and obtaining finished powder powder having an average particle diameter of 15 to 20 μm by grading.

In a preferred scheme, the first preset temperature value is 100 to 110°C, the second preset temperature value is 180 to 200°C, and the third preset temperature value is minus 40 to 100°C.

The present invention uses a spray coating process of coating twice and baking once in the painting process of anti-slip powder paint, and includes the following steps.

(1) on the surface of the treated metal substrate, spray-coating the rough powder using an electrostatic spray coating method to wait;

(2) on the basis of step (1), using the electrostatic spray coating method to spray coat the finishing powder;

(3) repeating steps (1) and (2) to perform spray coating again;

(4) put the substrate subjected to two spray coatings in an oven at 200° C. to 220° C. and bake for 15 to 20 minutes to obtain a coating layer of anti-slip powder; In the leaving process, it is a step of installing so that the spray coated surface of the metal substrate is parallel to the horizontal ground.

Specific Example 1:

This embodiment prepares sample powders of two anti-skid powder paints; From here,

Sample powder 1: Crude powder is composed of raw materials according to the weight percentages below,

Epoxy Resin: 55%

Hardener: 5%

Modified TPU resin: 15%

Sand texture agent: 0.7%

Benzoic acid: 0.2%

Pigment: 10%

Filler: 14.1%

The finishing powder consists of raw materials according to the weight percentages below,

TPU Resin: 75%

Nano-Silicon Dioxide: 0.75%

Water: 3.0%

Pigment: 12%

Filler: 9.25%.

Sample powder 2: The rough powder is composed of raw materials according to the weight percentages below,

Epoxy resin: 55%

Hardener: 5%

Modified TPU resin: 15%

Sand texture agent: 0.7%

Benzoic acid: 0.2%

Pigment: 10%

Filling: 29.1%

The finishing powder consists of raw materials according to the weight percentages below,

TPU Resin: 75%

Nano-Silicon Dioxide: 0.75%

Water: 3.0%

Pigment: 12%

Filler: 9.25%.

In this embodiment, the blending ratio of the finishing powders of Sample Powder 1 and Sample Powder 2 is exactly the same; The difference between sample powder 1 and sample powder 2 is that sample powder 1 contains the modified TPU resin in a weight ratio of 15% to the rough powder; Sample powder 2 does not contain a modified TPU resin.

In the present invention, the epoxy resin is a bisphenol A type epoxy resin, a phenol aldehyde modified epoxy resin, a hydrogenated or brominated bisphenol A epoxy resin, an aliphatic ring epoxy resin, an aliphatic ring glycidyl ether type epoxy resin, an aliphatic ring glycol one or more of cydyl ester type epoxy resins.

Preferably, the curing agent is dicyandiamide, substituted dicyandiamide, aromatic amine, dicarboxylic acid dihydrazide, acid anhydride, imidazole, imidazoline, cyclic amidine, boron trifluoride amine complex, phenol contains one or more hydroxyl resins; The modified TPU resin is a polyurethane microsphere modified with an epoxy resin; The TPU resin is a polyether type thermoplastic polyurethane.

In this embodiment, the manufacturing process of the non-slip powder paint is as follows.

1) For the rough powder of Sample Powder 1, the raw materials were weighed and taken according to the percentage of the formula; wait for the temperature of the twin screw extruder to rise to 108° C., proceed with melt extrusion, cold refining, coarse grinding, and ACM abrasive grinding to obtain a powder of the rough powder of sample powder 1 with an average particle diameter of 30 μm;

2) For the rough powder of sample powder 2, the raw materials were weighed and taken according to the percentage of the formula; wait for the temperature of the twin screw extruder to rise to 100° C., proceed with melt extrusion, cooling refining, coarse grinding, and ACM abrasive grinding to obtain a powder of the rough powder of sample powder 2 with an average particle diameter of 30 μm by grading;

3) For the finished powders of Sample Powder 1 and Sample Powder 2, weigh the raw materials according to the percentage of the blending method, wait for the single screw extruder to raise the temperature to 190 ° C, proceed with melt extrusion, cooling refining, water cooling and coarse grinding, and the third temperature ACM abrasive grinding is performed in the range of -40 to 100 ° C., which is the value, and graded to obtain a powder of a finishing powder having an average particle diameter of 18 μm.

In this embodiment, spray coating of anti-slip powder paint is performed on the surface of a metal substrate, and sample powder 1 and sample powder 2 have the same matching painting process as a set, and include the following steps.

(a) On the surface of the treated metal substrate, spray coating is performed on the rough powder of sample powder 1 and the rough powder of sample powder 2 prepared in steps (1) and (2) by electrostatic spray coating, respectively, obtaining and waiting for semi-finished workpiece 1 and workpiece 2;

(b) on the basis of step a, spray-coating the finishing powder on the surfaces of the semi-finished workpiece 1 and workpiece 2 respectively by electrostatic spray coating method, and waiting;

(c) On the basis of step b, repeat steps (a) and (b) again for the spray-coated surfaces of semi-finished workpieces 1 and 2, that is, spray-coate the surfaces of the metal substrate twice. proceeding;

(d) The spray-coated surface of the metal substrate was placed in an oven at a temperature of 210° C. and baked for 15 minutes to obtain samples 1 and 2. In the leaving process, it is a step of arranging the spray-coated surface of the metal substrate to be parallel to the horizontal ground.

A test is performed on sample powder 1 and sample powder 2 to obtain Control Table 1.

Checklist 1

As can be seen from the above table, the rough powder formula of Sample Powder 2 did not include a modified TPU resin; Therefore, after baking the roughing and finishing powders of sample powder 2, the bonding force between the coating layers was poor; After adding the modified TPU resin to sample powder 1 and baking its rough and finished powder, the bonding force between the coating layers was very strong. In particular, after undergoing an accelerated test simulating the long-term performance, the results of Sample Powder 1 and Sample Powder 2 were significantly different, further confirming the above conclusion.

Specific Example 2:

This embodiment prepares sample powder of anti-slip powder paint,

Sample powder 3: The rough powder is composed of raw materials according to the weight percentages below,

Epoxy Resin: 55%

Hardener: 5%

Modified TPU resin: 15%

Sand texture agent: 0.7%

Benzoic acid: 0.2%

Pigment: 10%

Filler: 14.1%,

The finishing powder consists of raw materials according to the weight percentages below,

TPU Resin: 75%

Nano-Silicon Dioxide: 0.75%

Pigment: 12%

Filler: 12.25%.

In this embodiment, the manufacturing process of the non-slip powder paint is as follows.

1) For the rough powder of sample powder 3, the raw materials were weighed and taken according to the percentage of the formula; waiting for the temperature of the twin screw extruder to rise to 108°C, proceeding with melt extrusion, cooling refining, coarse grinding, ACM grinding and grinding, and grading to obtain the powder of the rough powder of sample powder 3 with an average particle diameter of 30 μm;

2) For the finished powder of sample powder 3, raw materials were weighed according to the percentage of the blending method, and melt extrusion, cooling refining, and water cooling were performed by waiting for the single screw extruder to raise the temperature to 190 ° C, and the third temperature value of minus 40 ACM abrasive grinding is performed in the range of 100 ° C. to 100 ° C., and the powder of the finished powder having an average particle diameter of 18 μm is obtained by grading.

In this embodiment, the spray coating process of the anti-skid powder paint is the same as that of the specific embodiment 1; Sample 3 is obtained by performing spray coating on the sample powder 3 using a spray coating process on the surface of the metal substrate.

Comparison Table 2 is obtained by comparing Sample 3 with Sample 2 of Specific Example 1.

Checklist 2

As can be seen from the above table, no water was added to the finishing powder formulation of Sample Powder 3; After spray coating, the coating layer becomes loose and cannot generate a large number of holes, so that the water absorption amount is significantly reduced, and therefore, the condition of capillarity still cannot be formed.

Specific Example 3:

This embodiment prepares sample powder of anti-slip powder paint,

Sample powder 4: The rough powder is composed of raw materials according to the weight percentages below,

Epoxy Resin: 55%

Hardener: 5%

Modified TPU resin: 15%

Sand texture agent: 0.7%

Benzoic acid: 0.2%

Pigment: 10%

Filler: 14.1%,

The finishing powder consists of raw materials according to the weight percentages below,

TPU Resin: 75%

Nano-Silicon Dioxide: 0.75%

Water: 3.0%

Pigment: 12%

Filler: 9.25%.

In this Example, the blending method of Sample Powder 4 is exactly the same as the blending ratio of Sample Powder 1 in Specific Example 1.

In this embodiment, the manufacturing process of the non-slip powder paint of sample powder 4 is as follows.

1) For the rough powder of sample powder 4, the raw materials were weighed and taken according to the percentage of the formula; wait for the temperature of the twin screw extruder to rise to 108° C., proceed with melt extrusion, cold refining, coarse grinding, and ACM abrasive grinding to obtain a powder of the rough powder of sample powder 4 with an average particle diameter of 30 μm;

2) For the finished powder of sample powder 4, weigh the raw materials according to the percentage of the blending method, wait for the single-screw extruder to raise the temperature to 100 ° C, proceed with melt extrusion, cooling refining, coarse grinding, and ACM grinding grinding, and grade and average The powder of the finishing powder of sample powder 4 having a particle diameter of 30 μm was obtained.

As can be seen from this, in the manufacturing process, the average particle diameter of the finished powder of sample powder 4 is 30 μm, and the average particle diameter of the finished powder of sample powder 1 is 18 μm.

In this embodiment, the spray coating process of sample powder 4 and sample powder 1 in specific example 1 is the same. The surface of the metal substrate is subjected to spray coating on sample powder 4 through a spray coating process, and then sample 4 is obtained.

The sample 4 and sample 1 of the specific embodiment 1 are tested and compared to obtain control table 3.

Checklist 3

As can be seen from Comparative Table 3, when the average particle diameter of the finished powder of sample powder 4 is 30 μm, the surface water absorption and adsorption power to the object are significantly lowered, and the surface becomes rougher, changing into large particles. , The diameter of the columnar TPU coating layer is too thick, the capillary effect is weakened, and the water absorption is poor, and at the same time, the pressure difference generated when the coating layer is compressed is small, and furthermore, the surface adsorption capacity is poor.

Specific Example 4:

This example uses the same formulation and the same manufacturing method as Sample Powder 1 in Specific Example 1; When painting the surface of a metal substrate, the following spray coating process is used.

(a) performing spray coating on the rough powder of the sample powder 4 using an electrostatic spray coating method on the surface of the pretreated metal substrate to obtain a semi-finished workpiece 5 and waiting;

(b) on the basis of step a, spray-coating the finishing powder on the surface of the semi-finished workpiece 5 by the same electrostatic spray-coating method, and waiting;

(c) on the basis of step b, repeating steps (a) and (b) again for the spray-coated surface of the semi-finished workpiece 5, that is, spray-coating the surface of the metal substrate twice. ;

(d) the spray-coated surface of the metal substrate was placed in an oven at a temperature of 210° C. and baked for 15 minutes to obtain specimen 5; In the leaving process, it is a step of installing the spray coating surface of the metal substrate so that it is perpendicular to the horizontal ground.

As can be seen from the above spray coating process, in this embodiment, the surface of the metal substrate is spray coated, then placed in an oven, and the spray coating surface of the metal substrate is installed perpendicular to the horizontal ground; In specific embodiment 1, the spray coating surface of the metal substrate is installed to form a horizontal angle with the horizontal ground. Thus, check table 4 is obtained.

Checklist 4

As can be seen from the above table, specimen 5 is noticeably flatter in appearance than specimen 1 by changing the angle of the spray-coated surface when baking the workpiece, which has relatively less columnar material formed in the coating layer and is water absorbent. This explains that the capillary phenomenon is weak and the surface adsorption power is reduced.

As described in specific examples 1 to 4, in the present invention, the formulation, manufacturing method and painting process of the anti-slip powder paint all work in concert and intersect with each other, and the design for each parameter is all in order to achieve the effect of the coating layer As set up, its action is very clear.

The above content is merely a preferred embodiment of the present invention, and is not used to limit the present invention, and the present invention has been described in detail with reference to the above embodiments, but those skilled in the art will still understand that each of the above embodiments is described. Modifications may be made to a technical scheme, or equivalent substitutions may be made to some technical features among them, and all modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are all in accordance with the present invention. should be included within the scope of protection.

Claims (9)

In anti-skid powder paint,
The anti-skid powder paint is composed of roughing powder and finishing powder; The crude powder is composed of the following raw materials and weight percentages,
Epoxy resin: 50.0 to 65.0%;
curing agent: 2.5 to 17.0%;
modified TPU resin: 10.0 to 20.0%;
Sand texture agent: 0.5% to 1.0%;
Benzoic acid: 0.1 to 0.3%;
Pigment: 3.0 to 25.0%;
filler: 0 to 27.0%;
The sum of these percentages equals 100%;
The finishing powder is composed of the following raw materials and weight percentages,
TPU resin: 60 to 90%;
nano-silicon dioxide: 0.5% to 1.0%;
Water: 1.0 to 5.0%;
Pigment: 3.0 to 25.0%;
filler: 0 to 26.0%;
Anti-skid powder paint, characterized in that the sum of the percentages is 100%. According to claim 1,
The epoxy resin is a bisphenol A type epoxy resin, a phenol aldehyde modified epoxy resin, a hydrogenated or brominated bisphenol A epoxy resin, an aliphatic ring epoxy resin, an aliphatic ring glycidyl ether type epoxy resin, an aliphatic ring glycidyl ester type An anti-skid powder paint comprising one or more of epoxy resins. According to claim 1,
The curing agent is selected from dicyandiamide, substituted dicyandiamide, aromatic amine, dicarboxylic acid dihydrazide, acid anhydride, imidazole, imidazoline, cyclic amidine, boron trifluoride amine complex, and phenolic hydroxyl resin. Anti-skid powder paint, characterized in that it comprises one or more. According to claim 1,
The anti-slip powder paint, characterized in that the modified TPU resin is a polyurethane microsphere modified with an epoxy resin. According to claim 1,
The TPU resin is a non-slip powder paint, characterized in that the polyether type thermoplastic polyurethane. According to claim 1,
The anti-skid powder paint is composed of roughing powder and finishing powder; The crude powder is composed of the following raw materials and weight percentages,
Epoxy Resin: 55%;
curing agent: 5%;
Modified TPU resin: 15%;
Sand texturing agent: 0.7%;
Benzoic acid: 0.2%;
pigment: 10%;
Filler: 14.1%;
The finishing powder is composed of the following raw materials and weight percentages,
TPU resin: 75%;
Nano-silicon dioxide: 0.75%;
water: 3.0%;
pigment: 12%;
Filler: Anti-skid powder paint, characterized in that 9.25%. In the manufacturing method of the anti-slip powder paint according to claim 1,
The manufacturing method,
(1) For the raw powder, the raw materials are weighed and taken according to the percentage of the formula; Waiting for the twin-screw extruder to raise the temperature to a preset first temperature value, melt extrusion, cooling tabletting, primary crushing, and ACM abrasive grinding are performed, and the coarse powder having an average particle diameter of 25 to 45 μm is graded. obtaining;
(2) For the finished powder, raw materials are weighed and taken according to the percentage of the blending method, and the single screw extruder waits for the temperature to rise to a preset second temperature value to proceed with melt extrusion, cooling refining, and water cooling coarsening; Proceeding with ACM abrasive grinding under a preset third temperature value, and obtaining powder of finished powder having an average particle diameter of 15 to 20 μm by dividing grades; manufacturing method characterized by comprising a. According to claim 7,
The first preset temperature value is 100 to 110 ° C, the second preset temperature value is 180 to 200 ° C, and the third preset temperature value is minus 40 to 100 ° C. In the spray coating process for painting the anti-slip powder paint of claim 1,
The spray coating process includes the following steps,
(1) on the surface of the treated metal substrate, spray-coating the rough powder using an electrostatic spray coating method to wait;
(2) on the basis of step (1), using the electrostatic spray coating method to spray coat the finishing powder;
(3) repeating steps (1) and (2) to perform spray coating again;
(4) put the substrate subjected to two spray coatings in an oven at 200° C. to 220° C. and bake for 15 to 20 minutes to obtain a coating layer of anti-slip powder; In the leaving process, the step of installing the spray coating surface of the metal substrate so that it is parallel to the horizontal ground; spray coating process characterized in that it comprises a.

Images