High-weather-resistance and stain-resistance color-coated sheet processing equipment and color-coated sheet

Abstract

The invention relates to the field of color-coated sheet processing, in particular to high-weather-resistance and stain-resistance color-coated sheet processing equipment and a color-coated sheet. The processing equipment has leveling and shaping functions and comprises a processing control table, a self-adaptive protection part, a flattening and shaping assembly and the like, and the top of a folding lifting table is provided with the protection part used for conducting self-adaption on the coiled material coating plate. And a flattening and shaping assembly used for pressing and flattening the coiled material coating plate is arranged between the processing console and the cutting assembly. A plurality of electric conveying roller sets are arranged, so that the coiled material coating plate can be conveniently and horizontally pushed and fed, and the aim of rolling and leveling the coiled material coating plate is achieved; the coiled material coating plate can be flattened and limited while being cut through the cutting assembly and the flattening and shaping assembly, the purpose of flattening and shaping the coiled material coating plate can be achieved, the cutting flatness of the coiled material coating plate can be improved, and the coiled material coating plate is prevented from shifting in the cutting process.

Description

Technical Field

[0001] The invention relates to the field of color-coated plate processing, in particular to highly weather-resistant and anti-fouling color-coated plate processing equipment and color-coated plates. Background Art

[0002] Color coated steel sheet, also known as pre-coated steel sheet or color coated steel sheet, is a composite material with one or more layers of organic coating applied on a metal substrate (usually galvanized steel sheet or aluminum-zinc alloy steel sheet), which has the characteristics of high weather resistance and anti-fouling. It usually has a variety of colors and surface textures and is widely used in construction, home appliances, transportation and other fields.

[0003] The Chinese Patent Network discloses an invention patent for an anti-static color-coated plate intelligent slitting device and a method of use, and its authorization announcement number is CN117754039B. The device rotates the reciprocating screw inside the cleaning mechanism, so that the moving block drives the wiping block with a V-shaped groove to move horizontally along the surface of the slitting knife, so that the wiping plates on both sides always move in contact with the blade surface of the slitting knife, and automatically wipes the oil and metal chips on the surface of the slitting knife. Since the device does not have a related structural function for pressing and leveling the color-coated plate when slitting, and the existing color-coated plates are rolled up in a coil before slitting, the color-coated plate is prone to curling during the slitting process, which will cause uneven slitting of the color-coated plate, thereby affecting the slitting quality of the color-coated plate.

[0004] Based on this, a highly weather-resistant and anti-fouling color-coated plate processing equipment with leveling and shaping functions is specially proposed to solve the above technical problems. Summary of the invention

[0005] In order to overcome the disadvantage that the existing device is difficult to level and press the color-coated plates during use, resulting in uneven cutting of the color-coated plates, the technical problem to be solved is: to provide highly weather-resistant and anti-fouling color-coated plate processing equipment with leveling and shaping functions.

[0006] The technical solution of the present invention is: a highly weather-resistant and anti-fouling color-coated plate processing equipment, comprising a processing control console, a folding and lifting platform, a card seat, a transmission and feeding component and a cutting component, wherein a folding and lifting platform is arranged on the right side of the processing control console, and a transmission and feeding component and a cutting component are arranged on the left side of the processing control console, and a card seat for placing the coiled material coating plate is symmetrically arranged on the top of the folding and lifting platform, and also comprises an adaptive protective member and a flattening and shaping component, wherein an adaptive protective member for the coiled material coating plate is arranged on the top of the folding and lifting platform, and a flattening and shaping component for pressing and flattening the coiled material coating plate is arranged between the processing control console and the cutting component; Wherein, the adaptive protective part includes a connecting sleeve, a spring and a pressure roller. The front and rear sides of the top of the folding lifting platform are respectively provided with connecting sleeves, and a group of pressure rollers are movably sleeved between the two connecting sleeves, and a spring is connected between the end of the pressure roller and the middle of the connecting sleeve; the transmission feeding assembly includes a mounting seat, an electric transmission roller group, an electric conveyor belt and a pad. Two mounting seats are arranged on the right side of the top of the processing console, and an electric transmission roller group for pushing the coil coating plate is arranged between the two mounting seats. The electric conveyor belt is arranged on the left side of the top of the processing console, and a pad is connected between the front and rear sides of the top of the processing console, and the pad is located on the inner side of the electric conveyor belt; the cutting The component includes a mounting frame, an electric cylinder and a cutter. A mounting frame is arranged in the middle of the top of the processing console, and an electric cylinder is arranged on the mounting frame. The end of the telescopic rod of the electric cylinder is equipped with a cutter for cutting the coil coating plate; the flattening and shaping component includes a connecting arm, a guide rod, a pressure plate, a connecting column and an elastic member. The end of the telescopic rod of the electric cylinder is sleeved with a connecting arm, and a guide rod is arranged on the left side of the top of the processing console. A pressure plate that can slide up and down is sleeved on the guide rod, and a connecting column is connected to the middle of the pressure plate, and one end of the connecting arm is movably sleeved on the connecting column, and an elastic member is sleeved on the connecting column, and the upper end of the elastic member is connected to the connecting arm, and the lower end is connected to the pressure plate.

[0007] As a further improvement of the above technical solution, the upper and lower end surfaces of the pad are in sliding contact with the inner side surface of the electric conveyor belt respectively.

[0008] As a further improvement of the above technical solution, the upper end surface of the electric conveyor belt is higher than the top end surface of the processing console.

[0009] As a further improvement of the above technical solution, a slot for positioning the coil coating plate is provided on the holder.

[0010] As a further improvement of the above technical solution, it also includes an edge processing component, which includes an electric slide rail, a telescopic part, an electric grinding wheel and a guide rail. The electric slide rail is connected between the front and rear sides of the mounting frame. The telescopic part is installed on the slider of the electric slide rail. The lower end of the telescopic part is equipped with an electric grinding wheel for grinding the edge of the coil coating plate through a connecting shaft, and the electric grinding wheel is located directly below the cutter. The guide rail is installed on the side of the electric slide rail through a connecting frame, and the connecting shaft is movably sleeved in the guide rail.

[0011] As a further improvement of the above technical solution, the folding lifting platform, the electric conveying roller group, the electric conveyor belt, the electric cylinder, the electric slide rail and the electric grinding wheel are all electrically connected to the processing control console.

[0012] As a further improvement of the above technical solution, both the front and rear ends of the guide rail are designed as upwardly bent structures.

[0013] As a further improvement of the above technical solution, it also includes a guide roller, which is rotatably connected between the front and rear sides of the two mounting seats, and the guide roller is flush with the lower conveying roller of the electric conveying roller group.

[0014] As a further improvement of the above technical solution, a protective pad is also included. A protective pad is arranged at the bottom of the pressing plate.

[0015] The high weather-resistant and anti-fouling color-coated plate of the present invention comprises a metal substrate, which is one of a galvanized steel plate or an aluminum-zinc alloy steel plate. The metal substrate is provided with a high weather-resistant and anti-fouling coating, and the high weather-resistant and anti-fouling coating is composed of the following raw materials in parts by weight: 25 parts of xylene, 40 parts of fluorocarbon resin, 8 parts of methyl methacrylate, 0.5 parts of 2,4-di-tert-butyl-6-(5-chlorobenzotriazole-2-yl)phenol, 0.7 parts of tetraethoxysilane, 2 parts of cerium trioxide, 3 parts of silicon oxide nanofibers, 2 parts of nano zinc oxide, and 0.2 parts of polydimethylsiloxane.

[0016] The present invention has the following advantages: 1. The adaptive protective member structure composed of a connecting sleeve, a spring and a pressure roller can achieve the purpose of adaptively sticking and limiting the gradually released coiled material coating plate, so that the coiled material coating plate can achieve a certain tensioning effect, thereby effectively avoiding the phenomenon that the released coiled material coating plate is too loose; by providing multiple groups of electric conveying roller groups, it is convenient to push and load the coiled material coating plate horizontally, and it is beneficial to roll and flatten the curled coiled material coating plate; through the cutting component and the flattening and shaping component, the coiled material coating plate can be cut and flattened at the same time, which can not only achieve the purpose of flattening and shaping the coiled material coating plate, but also help to improve the flatness of the cutting of the coiled material coating plate, and avoid the displacement of the coiled material coating plate during the cutting process.

[0017] 2. By controlling the electric slide rail, the electric grinding wheel can move back and forth along the track of the guide rail, and the edge of the cut coil coating plate can be polished, thereby further improving the flatness of the cut coil coating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A top view of the present invention; Figure 3 It is a front view of the present invention; Figure 4 This is a schematic diagram of the folding lifting platform and the connection structure of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the adaptive protective element of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the transmission and feeding assembly of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the cutting component and the flattening and shaping component of the present invention; Figure 8 It is a schematic diagram of the connection structure of the cutting component and the edge processing component of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the edge processing component of the present invention.

[0019] Marked in the figure: 1-processing control console, 2-folding lifting platform, 3-card seat, 30-card slot, 4-connecting sleeve, 5-spring, 6-pressure roller, 7-mounting seat, 8-electric transmission roller group, 9-guide roller, 10-electric conveyor belt, 11-pad, 12-mounting frame, 13-electric cylinder, 14-cutter, 15-connecting arm, 16-guide rod, 17-pressure plate, 18-connecting column, 19-elastic part, 20-protective pad, 21-electric slide rail, 22-telescopic part, 23-electric grinding wheel, 24-guide rail, a-coil coating plate. DETAILED DESCRIPTION

[0020] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the position of the structure shown in the corresponding drawings. The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning. The words such as connection and coupling in this application include direct and indirect connection (coupling) unless otherwise specified.

[0021] Embodiment 1: The highly weather-resistant and anti-fouling color-coated plate processing equipment provided by the present invention is as follows: Figures 1 to 8As shown, it includes a processing control console 1, a folding and lifting platform 2, a holder 3, an adaptive protective member, a transmission and feeding component, a cutting component and a flattening and shaping component. A folding and lifting platform 2 is arranged on the right side of the processing control console 1. The folding and lifting platform 2 is mainly composed of an electric cylinder, a scissor-type telescopic frame and a placement platform combination. By controlling the extension or shortening of the telescopic rod of the electric cylinder, the scissor-type telescopic frame can be driven to extend or fold, and then the placement platform can be driven to rise or fall to adjust the height, which is used to conveniently adjust the release height of the placed coil coating plate a; a transmission and feeding component and a cutting component are respectively arranged on the left side of the processing control console 1, and a holder 3 for placing the coil coating plate a is symmetrically arranged on the top of the folding and lifting platform 2, and a card slot 30 for positioning the coil coating plate a is arranged on the holder 3, which is conducive to positioning the placed coil coating plate a; an adaptive protective member for the coil coating plate a is arranged on the top of the folding and lifting platform 2, and a flattening and shaping component for pressing and flattening the coil coating plate a is arranged between the processing control console 1 and the cutting component; Among them, the adaptive protective part includes a connecting sleeve 4, a spring 5 and a pressure roller 6. The connecting sleeves 4 are respectively arranged on the front and rear sides of the top of the folding lifting platform 2. A group of pressure rollers 6 are movably sleeved between the two connecting sleeves 4, and a spring 5 is connected between the end of the pressure roller 6 and the middle of the connecting sleeve 4. The spring 5 is a tension spring, which is used to provide tension to the pressure roller 6 so that the end face of the pressure roller 6 can be tightly attached to the coil coating plate a, and then it can be adaptively retracted and closed as the volume of the coil coating plate a is gradually reduced after being released, which can effectively prevent the coil coating plate a from becoming loose during the gradual release process; Transmission and feeding The assembly includes a mounting seat 7, an electric transmission roller group 8, an electric conveyor belt 10 and a pad 11. Two mounting seats 7 are arranged on the right side of the top of the processing console 1. An electric transmission roller group 8 is arranged between the two mounting seats 7. Each group of electric transmission roller groups 8 is composed of two electric roller wheels, and the ends of each group of two electric roller wheels are driven by gear meshing. An electric conveyor belt 10 is arranged on the left side of the top of the processing console 1, and the upper end surface of the electric conveyor belt 10 is slightly higher than the top end surface of the processing console 1, which is conducive to horizontally pushing out the cut coil coating plate a; the front and rear sides of the top of the processing console 1 A pad 11 is connected between the processing console 1, and the pad 11 is located on the inner side of the electric conveyor belt 10, and the upper and lower end surfaces of the pad 11 are respectively in sliding contact with the inner side surface of the electric conveyor belt 10, so as to cooperate with the pressing plate 17 to extrude and flatten the coiled material coating plate a, thereby achieving the purpose of flattening and shaping the coiled material coating plate a; the cutting component includes a mounting frame 12, an electric cylinder 13 and a cutter 14, a mounting frame 12 is arranged in the middle of the top of the processing console 1, an electric cylinder 13 is arranged on the mounting frame 12, and a cutter 14 for cutting the coiled material coating plate a is assembled at the end of the telescopic rod of the electric cylinder 13; the flattening and shaping component It includes a connecting arm 15, a guide rod 16, a pressure plate 17, a connecting column 18 and an elastic member 19. The connecting arm 15 is sleeved on the end of the telescopic rod of the electric cylinder 13. A guide rod 16 is provided on the left side of the top of the processing console 1. A pressure plate 17 that can slide up and down is sleeved on the guide rod 16. A connecting column 18 is connected to the middle of the pressure plate 17, and one end of the connecting arm 15 is movably sleeved on the connecting column 18. An elastic member 19 is sleeved on the connecting column 18. The upper end of the elastic member 19 is connected to the connecting arm 15, and the lower end is connected to the pressure plate 17. The elastic member 19 is a spring, which is used to buffer the pressure plate 17 that slides up and down.

[0022] The coated coil sheet a is hoisted onto the folding lifting platform 2 and is located between the two holders 3. By controlling the folding lifting platform 2 to rise or fall, the height of the coated coil sheet a can be conveniently adjusted during the gradual release process. One end of the coated coil sheet a is pulled out and plugged between the electric conveying roller group 8. The electric conveying roller group 8 is started to convey the coated coil sheet a to the left. The coated coil sheet a can be horizontally guided during the conveying process by the guide roller 9, so that the coated coil sheet a is pushed to the bottom of the cutter 14 and onto the electric conveyor belt 10. The electric cylinder 13 is controlled to make it When the telescopic rod is extended, the cutter 14 can be driven to extend downward to cut the coated coil sheet a; and when the electric cylinder 13 drives the cutter 14 to extend downward, the connecting column 18 and the pressing plate 17 will be driven to move downward synchronously through the connecting arm 15, so that the pressing plate 17 can flatten and fix the coated coil sheet a, avoiding the displacement of the coated coil sheet a during cutting, which is beneficial to improve the flatness of the coated coil sheet a. Subsequently, the electric cylinder 13 is controlled to drive the cutter 14 and the pressing plate 17 to reset upward, and the electric conveyor belt 10 can be controlled to convey the cut coated coil sheet a to the left.

[0023] The highly weather-resistant and anti-fouling color-coated plate of the present invention comprises a metal substrate, which is one of a galvanized steel plate or an aluminum-zinc alloy steel plate. A highly weather-resistant and anti-fouling coating is provided on the metal substrate. The highly weather-resistant and anti-fouling coating is composed of the following raw materials in parts by weight: 25 parts of xylene, 40 parts of fluorocarbon resin, 8 parts of methyl methacrylate, 0.5 parts of 2,4-di-tert-butyl-6-(5-chlorobenzotriazole-2-yl)phenol, 0.7 parts of tetraethoxysilane, 2 parts of cerium trioxide, 3 parts of silicon oxide nanofibers, 2 parts of nano zinc oxide, and 0.2 parts of polydimethylsiloxane.

[0024] Embodiment 2: Based on Embodiment 1, Figure 1 , Figure 2 , Figure 3 , Figure 8 and Fig. 9As shown, it also includes an edge processing component, which includes an electric slide rail 21, a telescopic member 22, an electric grinding wheel 23 and a guide rail 24. The electric slide rail 21 is connected between the front and rear sides of the mounting frame 12. The telescopic member 22 is installed on the slider of the electric slide rail 21. The lower end of the telescopic member 22 is sleeved with an electric grinding wheel 23 for grinding the edge of the coil coating plate a through a connecting shaft, and the electric grinding wheel 23 is located directly below the cutter 14. The side of the electric slide rail 21 is installed with a guide rail 24 through a connecting frame, and the connecting shaft is movably sleeved in the guide rail 24, and the front and rear ends of the guide rail 24 are both upward. The bending structure is designed so that when the electric grinding wheel 23 is located at the left and right ends of the guide rail 24, the electric grinding wheel 23 will be lifted upward and separated from the coated coil plate a, and when the electric grinding wheel 23 is located at the horizontal end surface in the middle of the guide rail 24, the electric grinding wheel 23 will extend downward and contact the coated coil plate a, thereby being able to grind the edge of the coated coil plate a; and the folding lifting platform 2, the electric conveying roller group 8, the electric conveyor belt 10, the electric cylinder 13, the electric slide rail 21 and the electric grinding wheel 23 are all electrically connected to the processing control console 1, which is conducive to improving the convenience of operation when cutting the coated coil plate a.

[0025] Further, such as Figure 2 and Figure 6 As shown, it also includes a guide roller 9, which is rotatably connected between the front and rear sides of the two mounting seats 7, and the guide roller 9 is flush with the lower conveying roller of the electric conveying roller group 8, which is beneficial to the horizontal guidance of the coil coating plate a.

[0026] In addition, if Figure 7 As shown, a protective pad 20 is also included. A protective pad 20 is arranged at the bottom of the pressing plate 17, which is beneficial to avoid scratching the surface of the coiled coating plate a when squeezing the coiled coating plate a, thereby playing a certain protective role for the coiled coating plate a.

[0027] When the cutting of the coated coiled material a is completed and the cutter 14 returns to its original position, the electric slide rail 21 is controlled so that the slider thereon drives the telescopic member 22 and the electric grinding wheel 23 to move, so that the electric grinding wheel 23 can move accordingly along the track of the guide rail 24, and then the electric grinding wheel 23 can grind the edge of the coated coiled material a that has been cut, which is beneficial to further improve the flatness of the cutting of the coated coiled material a.

[0028] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly weather-resistant and anti-fouling color-coated plate processing equipment, characterized by: The invention comprises a processing control console (1), a folding lifting platform (2), a holder (3), a transmission and feeding assembly and a cutting assembly, wherein the processing control console (1) is provided with a folding lifting platform (2) on the right side, and the processing control console (1) is provided with a transmission and feeding assembly and a cutting assembly on the left side, respectively. The top of the folding lifting platform (2) is symmetrically provided with a holder (3) for placing the coiled material coating plate (a), and is characterized in that it also comprises an adaptive protective member and a flattening and shaping assembly, the top of the folding lifting platform (2) is provided with an adaptive protective member for the coiled material coating plate (a), and a flattening and shaping assembly for pressing and flattening the coiled material coating plate (a) is provided between the processing control console (1) and the cutting assembly; The adaptive protective member comprises a connecting sleeve (4), a spring (5) and a pressure roller (6); the front and rear sides of the top of the folding lifting platform (2) are respectively provided with connecting sleeves (4); a group of pressure rollers (6) are movably sleeved between the two connecting sleeves (4); and a spring (5) is connected between the end of the pressure roller (6) and the middle of the connecting sleeve (4); the transmission feeding assembly comprises a mounting seat (7), an electric transmission roller group (8), an electric conveyor belt (10) and a pad (11); two mounting seats (7) are provided on the right side of the top of the processing control console (1); an electric transmission roller group (8) for pushing the coil coating plate (a) is provided between the two mounting seats (7); an electric conveyor belt (10) is provided on the left side of the top of the processing control console (1); a pad (11) is connected between the front and rear sides of the top of the processing control console (1), and the pad (11) is located on the inner side of the electric conveyor belt (10); the cutting assembly comprises a mounting frame (12), an electric cylinder ( 13) and a cutter (14), a mounting frame (12) is arranged in the middle of the top of the processing console (1), an electric cylinder (13) is arranged on the mounting frame (12), and the end of the telescopic rod of the electric cylinder (13) is equipped with a cutter (14) for cutting the coil coating plate (a); the flattening and shaping component comprises a connecting arm (15), a guide rod (16), a pressing plate (17), a connecting column (18) and an elastic member (19), and the end of the telescopic rod of the electric cylinder (13) is sleeved with a connecting arm (15), a guide rod (16), a pressing plate (17), a connecting column (18) and an elastic member (19), A connecting arm (15), a guide rod (16) is arranged on the left side of the top of the processing console (1), a pressing plate (17) which can slide up and down is sleeved on the guide rod (16), a connecting column (18) is connected to the middle of the pressing plate (17), and one end of the connecting arm (15) is movably sleeved on the connecting column (18), an elastic member (19) is sleeved on the connecting column (18), the upper end of the elastic member (19) is connected to the connecting arm (15), and the lower end is connected to the pressing plate (17).

2. The highly weather-resistant and anti-fouling color-coated plate processing equipment according to claim 1 is characterized in that: The upper and lower end surfaces of the pad (11) are in sliding contact with the inner side surface of the electric conveyor belt (10) respectively.

3. The highly weather-resistant and anti-fouling color-coated plate processing equipment according to claim 1 is characterized in that: The upper end surface of the electric conveyor belt (10) is higher than the top end surface of the processing console (1).

4. The highly weather-resistant and anti-fouling color-coated plate processing equipment according to claim 1 is characterized in that: The holder (3) is provided with a slot (30) for positioning the coil coating plate (a).

5. The highly weather-resistant and anti-fouling color-coated plate processing equipment according to claim 1 is characterized in that: The invention also comprises an edge processing component, wherein the edge processing component comprises an electric slide rail (21), a telescopic member (22), an electric grinding wheel (23) and a guide rail (24); the electric slide rail (21) is connected between the front and rear sides of the mounting frame (12); the telescopic member (22) is installed on the slider of the electric slide rail (21); the lower end of the telescopic member (22) is provided with an electric grinding wheel (23) for grinding the edge of the coil coating plate (a) through a connecting shaft sleeve, and the electric grinding wheel (23) is located directly below the cutter (14); the guide rail (24) is installed on the side of the electric slide rail (21) through a connecting frame, and the connecting shaft is movably sleeved in the guide rail (24).

6. The highly weather-resistant and anti-fouling color-coated plate processing equipment according to claim 5 is characterized in that: The folding lifting platform (2), the electric conveying roller group (8), the electric conveyor belt (10), the electric cylinder (13), the electric slide rail (21) and the electric grinding wheel (23) are all electrically connected to the processing control console (1).

7. The highly weather-resistant and anti-fouling color-coated plate processing equipment according to claim 5 is characterized in that: Both the front and rear ends of the guide rail (24) are designed to be bent upwards.

8. The highly weather-resistant and anti-fouling color-coated plate processing equipment according to claim 1 is characterized in that: It also includes a guide roller (9), which is rotatably connected between the front and rear sides of the two mounting seats (7), and the guide roller (9) is flush with the lower conveying roller of the electric conveying roller group (8).

9. The highly weather-resistant and anti-fouling color-coated plate processing equipment according to claim 1, characterized in that: It also includes a protective pad (20), and the bottom of the pressing plate (17) is provided with a protective pad (20).

10. A highly weather-resistant and anti-fouling color-coated plate according to claim 1, characterized in that: The invention comprises a metal substrate, which is one of a galvanized steel plate or an aluminum-zinc alloy steel plate. A high weather-resistant anti-fouling coating is provided on the metal substrate. The high weather-resistant anti-fouling coating is composed of the following raw materials in parts by weight: 25 parts of xylene, 40 parts of fluorocarbon resin, 8 parts of methyl methacrylate, 0.5 parts of 2,4-di-tert-butyl-6-(5-chlorobenzotriazole-2-yl)phenol, 0.7 parts of tetraethoxysilane, 2 parts of cerium trioxide, 3 parts of silicon oxide nanofibers, 2 parts of nano zinc oxide, and 0.2 parts of polydimethylsiloxane.

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