Antibacterial wear-resistant PVC floor and preparation method thereof

Abstract

The invention belongs to the field of PVC (polyvinyl chloride) floors, and particularly relates to an antibacterial and wear-resistant PVC floor and a preparation method of the antibacterial and wear-resistant PVC floor. 40 to 65 parts of a plasticizer; 14 to 20 parts of a stabilizer; 12 to 16 parts of a lubricant; 6-14 parts of a coloring agent; 3-5 parts of an antioxidant; 10 to 20 parts of an anti-impact agent; 3-5 parts of a bacteriostatic agent; 6-8 parts of a wear-resistant agent; by means of the bacteriostatic agent, the PVC floor has the bacteriostatic effect and is high in functionality, the product produced through the method is environmentally friendly, free of toxicity and excellent in physical performance, the processing method is not complex, and the cost is greatly reduced; the surface of the PVC board is coated with the wear-resistant agent through coating equipment, the wear-resistant agent is dried for 50 min, then the surface of the PVC board is sprayed with the UV paint, curing is conducted to obtain the antibacterial wear-resistant PVC board, then vacuum coating is conducted on the surface of the PVC board, the PVC floor is prepared, and the wear resistance of the PVC floor is improved.

Description

Technical Field

[0001] The invention belongs to the field of PVC floor, in particular to an antibacterial and wear-resistant PVC floor and a preparation method thereof. Background Art

[0002] PVC flooring is a new type of lightweight floor decoration material that is very popular in the world today. It is also called "lightweight flooring". "PVC flooring" refers to flooring made of polyvinyl chloride materials. Specifically, it is made of polyvinyl chloride and its copolymer resin as the main raw materials, with fillers, plasticizers, stabilizers, colorants and other auxiliary materials added. It is produced on a sheet-like continuous substrate through a coating process or through calendering, extrusion or extrusion process.

[0003] In the prior art, the preparation of PVC flooring includes a mixing box, a twin-screw extruder, a conveyor belt, a hot air box, a sieve plate and other structures. During operation, it is usually necessary to put fillers, plasticizers, stabilizers, colorants and other raw materials into the mixing box, stir and mix them evenly through a stirring rod, and then put the raw materials into the twin-screw extruder, extruded after plasticization and molding, and cut into granules by a rotary knife after extrusion, and cooled. Then, the granular material falls onto the conveyor belt through the sieve plate, melts on the conveyor belt, and is molded under the pressure of the pressure roller to form a PVC sheet.

[0004] In the current existing technology, the practicality and diversity of PVC flooring can be improved by mixing various fillers. However, when PVC flooring is used as a light floor material in factory workshops, more shipping operations are involved in the workshops, and the environment in the workshops is worse than that in other decorative spaces. The PVC flooring needs to have good wear resistance and antibacterial properties. Moreover, when preparing PVC flooring, the size of the raw material particles may cause small particles to be plasticized and large particles to not be plasticized in the same period of time. In order to make all of them plasticized, the plasticization time needs to be extended, which may result in different degrees of plasticization and affect the quality of the PVC flooring.

[0005] To this end, the present invention provides an antibacterial and wear-resistant PVC floor and a preparation method thereof. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: the antibacterial and wear-resistant PVC floor of the present invention comprises the following raw material components in parts by weight:

[0008] PVC resin: 85-100 parts;

[0009] Plasticizer: 40-65 parts;

[0010] Stabilizer: 14-20 parts;

[0011] Lubricant: 12-16 parts;

[0012] Colorant: 6-14 parts;

[0013] Antioxidant: 3-5 parts;

[0014] Anti-impact agent: 10-20 parts;

[0015] Antibacterial agent: 3-5 parts;

[0016] Wear-resistant agent: 6 to 8 parts.

[0017] Preferably, the plasticizer is at least two of dioctyl phthalate, poly (2-methylbutylene succinate) or triacetin, the heat stabilizer is one or more of calcium stearate, magnesium stearate, barium stearate or zinc stearate, the lubricant is one or more of stearic acid, polyethylene wax or Fischer-Tropsch wax; the colorant is a pigment or a fuel, the antioxidant is one or more of antioxidant CA, antioxidant 264, antioxidant 2246 or antioxidant 1076, and the wear-resistant agent is a diamond wear-resistant agent.

[0018] The method for preparing the antibacterial and wear-resistant PVC floor preferably comprises the following steps:

[0019] S1: Weigh PVC resin and plasticizer according to the weight ratio, and put the PVC resin and plasticizer into a hot mixer for hot mixing;

[0020] S2: After the hot mixing is completed, the mixed material is put into a cold mixer, and a stabilizer, a lubricant, a colorant, an antioxidant, an antibacterial agent, and an anti-impact agent are added for cold mixing to obtain a dry mixed material;

[0021] S3: The dry blend is put into a twin-screw extruder, the dry blend is plasticized and formed, and then extruded. After extrusion, it is cut into granules by a rotary knife, cooled, and bagged;

[0022] S4: After the cut pellets are put into the granulation system, they are transported to the granulation device by negative pressure, and granules are scattered on the conveyor belt according to different particle sizes. Then the particles are melted on the conveyor belt and formed under the pressure of the pressure roller to form PVC sheets;

[0023] S5: UV antibacterial and wear-resistant treatment on the surface layer;

[0024] S6: Vacuum coating the surface of PVC sheet to produce PVC floor.

[0025] Preferably, the hot mixing temperature in S1 is 70-150° C., and the hot mixing time is 35 minutes; the cold mixing temperature in S2 is 40° C., and the cold mixing time is 20 minutes.

[0026] Preferably, when the PVC sheet is formed in S4, a cooling mechanism is used to cool and shape the extruded raw material; a coating mechanism can be used to coat the surface of the conveyor belt with a release agent, which is beneficial for separating the formed PVC sheet from the conveyor belt; an adjustment mechanism can be used to adjust the distance between the conveyor belt and the pressure roller, thereby realizing the function of processing PVC sheets of different thicknesses.

[0027] Preferably, in the S5, the surface layer UV antibacterial and wear-resistant treatment adopts a coating device to coat the surface of the PVC board with a wear-resistant agent, the wear-resistant agent is dried for 40 to 50 minutes, and then UV paint is sprayed on the surface of the PVC board and cured to obtain an antibacterial and wear-resistant PVC board.

[0028] Preferably, the granulating device in S4 comprises a screening drum; a bottom plate is fixedly connected to the bottom outer wall of the screening drum; four pillars are fixedly connected to the bottom plate; a fixed seat is provided at the bottom of the screening drum; the pillars are slidably connected to the fixed seat; springs are sleeved on the outer sides of the pillars; the two ends of the springs are respectively fixedly connected to the fixed seat and the bottom plate; a connecting plate is fixedly connected between two adjacent pillars; two fixed plates are fixedly connected to the two ends of the bottom of the fixed seat; an elliptical block is rotatably connected between the two fixed plates through a rotating shaft; a second motor is fixedly connected to two opposite fixed plates; the output shafts of the second motors are respectively fixedly connected to the rotating shafts;

[0029] A screening mechanism is provided in the screening drum; the screening mechanism comprises a first screen plate and a second screen plate which are fixed to the inner wall of the screening drum from top to bottom in sequence, and the screen holes on the first screen plate and the second screen plate gradually become smaller; a first motor is fixed to the top of the screening drum; the output shaft of the first motor passes through the top of the screening drum and is fixed to a rotating rod; the rotating rod is rotatably connected to the first screen plate and the second screen plate through a bearing, and three grid frames are fixed to the outer side wall of the rotating rod, and the bottoms of the three grid frames are respectively in contact with the first screen plate and the second screen plate; the outer side wall of the screening drum is connected and fixedly connected with a first discharge pipe and a second discharge pipe; the first discharge pipe is aligned with the first screen plate, and a first solenoid valve is installed on the outer wall of the first discharge pipe; the second discharge pipe is aligned with the second screen plate, and a second solenoid valve is installed on the outer wall of the second discharge pipe; a third solenoid valve is installed at the bottom of the screening drum; the top of the screening drum is connected and fixedly connected with a feed pipe.

[0030] Preferably, a first conveyor is provided below the fixed seat; a second conveyor is provided on the side of the first conveyor away from the fixed seat; six partitions are evenly fixedly connected to the conveyor belt of the first conveyor; a first mounting frame is fixedly connected to the end of the first conveyor close to the fixed seat; a first electric push rod is fixedly connected to the top of the first mounting frame; a demoulding agent box is fixedly connected to the output end of the first electric push rod; a paint brush is movably installed below the demoulding agent box; a first photoelectric switch is installed on the inner side wall of the first conveyor; the first photoelectric switch is electrically connected to the first electric push rod; a second mounting frame is fixedly connected to the end of the first conveyor away from the fixed seat; a second electric push rod is fixedly connected to the top of the second mounting frame; a pressure plate is fixedly connected to the output end of the second electric push rod; a plurality of pressure rollers are rotatably connected to the lower side of the pressure plate; a plurality of rollers are rotatably connected to the first conveyor; the pressure rollers cooperate with the rollers; a second photoelectric switch is installed on the inner side wall of the first conveyor; the second photoelectric switch is electrically connected to the second photoelectric switch.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1. The antibacterial and wear-resistant PVC floor and preparation method thereof of the present invention adopt an antibacterial agent and a wear-resistant agent; the antibacterial agent can make the PVC floor have an antibacterial effect and strong functionality, and the product produced by the method of the present invention is environmentally friendly and non-toxic, with excellent physical properties, and the processing method is not complicated, and the cost is greatly reduced; the wear-resistant agent is coated on the surface of the PVC board by a coating device, the wear-resistant agent is dried for 50 minutes, and then UV paint is sprayed on the surface of the PVC board, and cured to obtain an antibacterial and wear-resistant PVC board, and then vacuum coating is performed on the surface of the PVC board to obtain a PVC floor, thereby improving the wear resistance of the PVC floor.

[0033] 2. The antibacterial and wear-resistant PVC floor and the preparation method thereof of the present invention are as follows: the first sieve plate, the second sieve plate, the elliptical block and the spring are used in combination, the first motor and the second motor are turned on, and then the PVC particles are sucked into the screening cylinder through the negative pressure of the feed pipe by the suction fan, the rotating rod is driven to rotate by the first motor, and the rotating rod drives the grid frame to rotate, and the grid frame screens the PVC particles in each grid. As the sieve holes on the first sieve plate and the second sieve plate gradually become smaller, large particles of PVC will be screened on the first sieve plate, medium particles of PVC will be screened on the second sieve plate, and small particles will fall on the bottom of the screening cylinder; while screening, the second sieve plate is used to filter the PVC particles. The motor drives the elliptical block on the rotating shaft to rotate, and the long semi-axis of the elliptical block rotates to the vertical direction, pressing the connecting plate, and the connecting plate drives the pillar to move downward, and the pillar will drive the bottom plate to move downward, and the bottom plate drives the screening drum to move downward, the spring is compressed, and then the short semi-axis of the elliptical block rotates to the vertical direction. Under the action of the spring, the spring resets upward to lift the bottom plate, and drives the screening drum upward through the bottom plate to complete a vibration of the screening drum. The vibration and screening are combined to realize the function of rapid screening of PVC particles, and then the first solenoid valve, the second solenoid valve and the third solenoid valve are opened accordingly, and the rotation of the grid frame is coordinated to complete the discharge of PVC particles of different particle sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] Figure 1 is a flow chart of the method of the present invention;

[0036] Figure 2 is a stereogram of the present invention;

[0037] Figure 3 It is a partial stereogram of the present invention;

[0038] Figure 4 It is a structural schematic diagram of the screening cylinder in the present invention;

[0039] Figure 5 is a cross-sectional view of the screening drum of the present invention;

[0040] Figure 6 It is a schematic diagram of the structure of the first sieve plate and the second sieve plate in the present invention;

[0041] Figure 7 It is a structural schematic diagram of the first conveyor in the present invention;

[0042] In the figure: 1, the first conveyor; 11, the second conveyor; 12, the partition; 13, the roller; 2, the fixed seat; 21, the pillar; 211, the spring; 212, the connecting plate; 213, the fixed plate; 214, the elliptical block; 215, the second motor; 22, the bottom plate; 23, the screening cylinder; 24, the feeding pipe; 25, the first motor; 251, the rotating rod; 252, the first sieve plate; 253, the second sieve plate; 254, the grid frame; 26, the first discharge pipe; 27, the second discharge pipe; 28, the first solenoid valve; 29, the second solenoid valve; 210, the third solenoid valve; 3, the first mounting frame; 31, the first electric push rod; 32, the demoulding agent box; 33, the paint; 34, the first photoelectric switch; 4, the second mounting frame; 41, the second electric push rod; 42, the pressure plate; 43, the pressure roller; 44, the second photoelectric switch. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0044] Embodiment 1:

[0045] like Figure 1 As shown in FIG. 1 , the antibacterial and wear-resistant PVC flooring according to the embodiment of the present invention comprises the following raw material components in parts by weight:

[0046] PVC resin: 85 parts;

[0047] Plasticizer: 40 parts;

[0048] Stabilizer: 14 parts;

[0049] Lubricant: 12 parts;

[0050] Colorant: 6 parts;

[0051] Antioxidants: 3 parts;

[0052] Anti-impact agent: 10 parts;

[0053] Antibacterial agent: 3 parts;

[0054] Wear-resistant agent: 6 parts.

[0055] The plasticizer is dioctyl phthalate and poly (2-methylbutylene succinate); the heat stabilizer is calcium stearate and magnesium stearate; the lubricant is stearic acid and polyethylene wax; the colorant is pigment or fuel; the antioxidant is antioxidant CA and antioxidant 264; the wear-resistant agent is diamond wear-resistant agent.

[0056] The method for preparing the antibacterial and wear-resistant PVC floor comprises the following steps:

[0057] S1: Weigh PVC resin and plasticizer according to the weight ratio, and put the PVC resin and plasticizer into a hot mixer for hot mixing;

[0058] S2: After the hot mixing is completed, the mixed material is put into a cold mixer, and a stabilizer, a lubricant, a colorant, an antioxidant, an antibacterial agent, and an anti-impact agent are added for cold mixing to obtain a dry mixed material;

[0059] S3: The dry blend is put into a twin-screw extruder, the dry blend is plasticized and formed, and then extruded. After extrusion, it is cut into granules by a rotary knife, cooled, and bagged;

[0060] S4: After the cut pellets are put into the granulation system, they are transported to the granulation device by negative pressure, and granules are scattered on the conveyor belt according to different particle sizes. Then the particles are melted on the conveyor belt and formed under the pressure of the pressure roller to form PVC sheets;

[0061] S5: UV antibacterial and wear-resistant treatment on the surface layer;

[0062] S6: Vacuum coating the surface of PVC sheet to produce PVC floor.

[0063] The hot mixing temperature in S1 is 70° C. and the hot mixing time is 35 min; the cold mixing temperature in S2 is 40° C. and the cold mixing time is 20 min.

[0064] When the PVC sheet is formed in S4, a cooling mechanism is used to cool and shape the extruded raw material; a coating mechanism can be used to coat the surface of the conveyor belt with a release agent, which is beneficial for separating the formed PVC sheet from the conveyor belt; an adjustment mechanism can be used to adjust the distance between the conveyor belt and the pressure roller, thereby realizing the function of processing PVC sheets of different thicknesses.

[0065] In the S5, the surface layer UV antibacterial and wear-resistant treatment uses a coating device to coat the surface of the PVC board with a wear-resistant agent, the wear-resistant agent is dried for 40 minutes, and then UV paint is sprayed on the surface of the PVC board and cured to obtain an antibacterial and wear-resistant PVC board.

[0066] Embodiment 2:

[0067] like Figure 1 As shown in FIG. 1 , the antibacterial and wear-resistant PVC flooring according to the embodiment of the present invention comprises the following raw material components in parts by weight:

[0068] PVC resin: 93 parts;

[0069] Plasticizer: 53 parts;

[0070] Stabilizer: 17 parts;

[0071] Lubricant: 14 parts;

[0072] Colorant: 10 parts;

[0073] Antioxidants: 4 parts;

[0074] Anti-impact agent: 15 parts;

[0075] Antibacterial agent: 4 parts;

[0076] Anti-wear agent: 7 parts.

[0077] The plasticizer is dioctyl phthalate, poly (2-methylbutylene succinate) and triacetin, the heat stabilizer is magnesium stearate and barium stearate, the lubricant is polyethylene wax and Fischer-Tropsch wax; the colorant is pigment or fuel, the antioxidant is antioxidant 264 and antioxidant 2246, and the wear-resistant agent is diamond wear-resistant agent.

[0078] The method for preparing the antibacterial and wear-resistant PVC floor comprises the following steps:

[0079] S1: Weigh PVC resin and plasticizer according to the weight ratio, and put the PVC resin and plasticizer into a hot mixer for hot mixing;

[0080] S2: After the hot mixing is completed, the mixed material is put into a cold mixer, and a stabilizer, a lubricant, a colorant, an antioxidant, an antibacterial agent, and an anti-impact agent are added for cold mixing to obtain a dry mixed material;

[0081] S3: The dry blend is put into a twin-screw extruder, the dry blend is plasticized and formed, and then extruded. After extrusion, it is cut into granules by a rotary knife, cooled, and bagged;

[0082] S4: After the cut pellets are put into the granulation system, they are transported to the granulation device by negative pressure, and granules are scattered on the conveyor belt according to different particle sizes. Then the particles are melted on the conveyor belt and formed under the pressure of the pressure roller to form PVC sheets;

[0083] S5: UV antibacterial and wear-resistant treatment on the surface layer;

[0084] S6: Vacuum coating the surface of PVC sheet to produce PVC floor.

[0085] The hot mixing temperature in S1 is 110° C. and the hot mixing time is 35 min; the cold mixing temperature in S2 is 40° C. and the cold mixing time is 20 min.

[0086] When the PVC sheet is formed in S4, a cooling mechanism is used to cool and shape the extruded raw material; a coating mechanism can be used to coat the surface of the conveyor belt with a release agent, which is beneficial for separating the formed PVC sheet from the conveyor belt; an adjustment mechanism can be used to adjust the distance between the conveyor belt and the pressure roller, thereby realizing the function of processing PVC sheets of different thicknesses.

[0087] In the S5, the surface layer UV antibacterial and wear-resistant treatment uses a coating device to coat the surface of the PVC board with a wear-resistant agent, the wear-resistant agent is dried for 45 minutes, and then UV paint is sprayed on the surface of the PVC board and cured to obtain an antibacterial and wear-resistant PVC board.

[0088] Embodiment 3:

[0089] like Figure 1 As shown in FIG. 1 , the antibacterial and wear-resistant PVC flooring according to the embodiment of the present invention comprises the following raw material components in parts by weight:

[0090] PVC resin: 100 parts;

[0091] Plasticizer: 65 parts;

[0092] Stabilizer: 20 parts;

[0093] Lubricant: 16 parts;

[0094] Colorant: 14 parts;

[0095] Antioxidants: 5 parts;

[0096] Anti-impact agent: 20 parts;

[0097] Antibacterial agent: 5 parts;

[0098] Wear-resistant agent: 8 parts.

[0099] The plasticizer is dioctyl phthalate and poly (2-methylbutylene succinate); the heat stabilizer is barium stearate and zinc stearate; the lubricant is polyethylene wax and Fischer-Tropsch wax; the colorant is pigment or fuel; the antioxidant is antioxidant 2246 and antioxidant 1076; the wear-resistant agent is diamond wear-resistant agent.

[0100] The method for preparing the antibacterial and wear-resistant PVC floor comprises the following steps:

[0101] S1: Weigh PVC resin and plasticizer according to the weight ratio, and put the PVC resin and plasticizer into a hot mixer for hot mixing;

[0102] S2: After the hot mixing is completed, the mixed material is put into a cold mixer, and a stabilizer, a lubricant, a colorant, an antioxidant, an antibacterial agent, and an anti-impact agent are added for cold mixing to obtain a dry mixed material;

[0103] S3: The dry blend is put into a twin-screw extruder, the dry blend is plasticized and formed, and then extruded. After extrusion, it is cut into granules by a rotary knife, cooled, and bagged;

[0104] S4: After the cut pellets are put into the granulation system, they are transported to the granulation device by negative pressure, and granules are scattered on the conveyor belt according to different particle sizes. Then the particles are melted on the conveyor belt and formed under the pressure of the pressure roller to form PVC sheets;

[0105] S5: UV antibacterial and wear-resistant treatment on the surface layer;

[0106] S6: Vacuum coating the surface of PVC sheet to produce PVC floor.

[0107] The hot mixing temperature in S1 is 150° C. and the hot mixing time is 35 min; the cold mixing temperature in S2 is 40° C. and the cold mixing time is 20 min.

[0108] When the PVC sheet is formed in S4, a cooling mechanism is used to cool and shape the extruded raw material; a coating mechanism can be used to coat the surface of the conveyor belt with a release agent, which is beneficial for separating the formed PVC sheet from the conveyor belt; an adjustment mechanism can be used to adjust the distance between the conveyor belt and the pressure roller, thereby realizing the function of processing PVC sheets of different thicknesses.

[0109] In the S5, the surface layer UV antibacterial and wear-resistant treatment uses a coating device to coat the surface of the PVC board with a wear-resistant agent, the wear-resistant agent is dried for 50 minutes, and then UV paint is sprayed on the surface of the PVC board and cured to obtain an antibacterial and wear-resistant PVC board.

[0110] When the antibacterial agent provided by the present invention is used, the antibacterial agent can make the PVC floor have an antibacterial effect and strong functionality. The product produced by the method of the present invention is environmentally friendly and non-toxic, has excellent physical properties, and the processing method is not complicated, and the cost is greatly reduced. The wear-resistant agent is coated on the surface of the PVC plate by using a coating device, the wear-resistant agent is dried for 50 minutes, and then UV paint is sprayed on the surface of the PVC plate, and cured to obtain an antibacterial and wear-resistant PVC plate, and then vacuum coating is performed on the surface of the PVC plate to obtain the PVC floor, thereby improving the wear resistance of the PVC floor.

[0111] like Figures 2 to 7 As shown, the granulating device in S4 includes a screening drum 23; the bottom outer wall of the screening drum 23 is fixedly connected with a bottom plate 22; four pillars 21 are fixedly connected to the bottom plate 22; a fixed seat 2 is provided at the bottom of the screening drum 23; the pillars 21 are slidably connected to the fixed seat 2; springs 211 are sleeved on the outer sides of the pillars 21; the two ends of the spring 211 are respectively fixedly connected to the fixed seat 2 and the bottom plate 22; a connecting plate 212 is fixedly connected between two adjacent pillars 21; two fixed plates 213 are fixedly connected at both ends of the bottom of the fixed seat 2; an elliptical block 214 is rotatably connected between the two fixed plates 213 through a rotating shaft; two opposite fixed plates 213 are fixedly connected with a second motor 215; the output shafts of the second motor 215 are respectively fixedly connected to the rotating shaft;

[0112] The screening drum 23 is provided with a screening mechanism; the screening mechanism comprises a first screen plate 252 and a second screen plate 253 fixedly connected to the inner wall of the screening drum 23 from top to bottom, and the screen holes on the first screen plate 252 and the second screen plate 253 gradually become smaller; a first motor 25 is fixedly connected to the top of the screening drum 23; the output shaft of the first motor 25 passes through the top of the screening drum 23 and is fixedly connected to a rotating rod 251; the rotating rod 251 is rotatably connected to the first screen plate 252 and the second screen plate 253 through a bearing, and the outer wall of the rotating rod 251 is fixedly connected to three grid frames 254, three The bottom of the grid frame 254 is in contact with the first sieve plate 252 and the second sieve plate 253 respectively; the outer wall of the screening cylinder 23 is connected and fixedly connected with the first discharge pipe 26 and the second discharge pipe 27; the first discharge pipe 26 is aligned with the first sieve plate 252, and the outer wall of the first discharge pipe 26 is installed with a first solenoid valve 28; the second discharge pipe 27 is aligned with the second sieve plate 253, and the outer wall of the second discharge pipe 27 is installed with a second solenoid valve 29; the bottom of the screening cylinder 23 is installed with a third solenoid valve 210; the top of the screening cylinder 23 is connected and fixedly connected with the feed pipe 24.

[0113] When preparing PVC flooring, the size of the raw material particles may result in small particles being plasticized while large particles not being plasticized in the same period of time. In order to make all of them plasticized, the plasticization time needs to be extended, which may result in different degrees of plasticization and affect the quality of the PVC flooring.

[0114] When the screening mechanism provided by the present invention is used, the first motor 25 and the second motor 215 are first turned on at the same time, and then the PVC particles are sucked into the screening drum 23 through the negative pressure of the feed pipe 24 by the suction fan, and the rotating rod 251 is driven to rotate by the first motor 25, and the rotating rod 251 drives the grid frame 254 to rotate, and the grid frame 254 screens the PVC particles in each grid. Since the sieve holes on the first sieve plate 252 and the second sieve plate 253 gradually become smaller, large particles of PVC will be screened on the first sieve plate 252, medium particles of PVC will be screened on the second sieve plate 253, and small particles will fall on the bottom of the screening drum 23; while screening, the elliptical block 214 on the rotating shaft is driven to rotate by the second motor 215, and the elliptical block 214 is driven to rotate. 14 The long semi-axis rotates to the vertical direction, pressing the connecting plate 212, and the connecting plate 212 drives the pillar 21 to move downward, and the pillar 21 will drive the bottom plate 22 to move downward, and the bottom plate 22 drives the screening drum 23 to move downward, and the spring 211 is compressed. Then the short semi-axis of the elliptical block 214 rotates to the vertical direction. Under the action of the spring 211, the spring 211 resets upward to lift the bottom plate 22, and drives the screening drum 23 to move upward through the bottom plate 22, completing a vibration of the screening drum 23. The vibration and screening are combined to realize the function of quickly screening PVC particles. Then, the first solenoid valve 28, the second solenoid valve 29 and the third solenoid valve 210 are opened accordingly, and the rotation of the grid frame 254 is coordinated to complete the discharge of PVC particles of different particle sizes.

[0115] like Figures 2 to 7 As shown, a first conveyor 1 is provided below the fixed seat 2; a second conveyor 11 is provided on the side of the first conveyor 1 away from the fixed seat 2; six partitions 12 are evenly fixedly connected to the conveyor belt of the first conveyor 1; a first mounting frame 3 is fixedly connected to the end of the first conveyor 1 close to the fixed seat 2; a first electric push rod 31 is fixedly connected to the top of the first mounting frame 3; a demoulding agent box 32 is fixedly connected to the output end of the first electric push rod 31; a paint brush 33 is movably installed below the demoulding agent box 32; a first photoelectric switch 34 is installed on the inner side wall of the first conveyor 1; the first photoelectric switch 34 The electric switch 34 is electrically connected to the first electric push rod 31; a second mounting frame 4 is fixedly connected to one end of the first conveyor 1 away from the fixed seat 2; a second electric push rod 41 is fixedly connected to the top of the second mounting frame 4; a pressure plate 42 is fixedly connected to the output end of the second electric push rod 41; a plurality of pressure rollers 43 are rotatably connected to the lower part of the pressure plate 42; a plurality of rollers 13 are rotatably connected to the first conveyor 1; the pressure rollers 43 cooperate with the rollers 13; a second photoelectric switch 44 is installed on the inner side wall of the first conveyor 1; the second photoelectric switch 44 is electrically connected to the second photoelectric switch 44.

[0116] When the pressure roller and the supporting roller 13 provided by the present invention are used, the first conveyor 1 is turned on, and the partition 12 is driven to move by the first conveyor 1. When the partition 12 is aligned with the first photoelectric switch 34, the first photoelectric switch 34 controls the first electric push rod 31 to be turned on, and the demoulding agent box 32 and the paint brush 33 are driven to move downward by the first electric push rod 31. The paint brush 33 contacts the first conveyor 1, and the demoulding agent box 32 penetrates the demoulding agent into the paint brush 33. The paint brush 33 applies the demoulding agent on the conveyor belt of the first conveyor 1 and moves to one end. The first electric push rod 31 drives the demoulding agent box 32 and the paint brush 33 to move upward; the conveyor belt with the demoulding agent after coating moves to the bottom of the screening drum 23, and PVC particles of the same size are sprinkled in. The first conveyor 1 continues to drive the partition 12 to move until the partition 12 moves. The second photoelectric switch 44 is aligned, and the second photoelectric switch 44 controls the first conveyor 1 to stop, and then the particles melt on the conveyor belt, and the second electric push rod 41 is turned on, and the second electric push rod 41 drives the pressure plate 42 and the pressure roller 43 to move downward, and the pressure roller 43 cooperates with the roller 13 to calender the PVC particles to obtain a PVC sheet; wherein the first photoelectric switch 34 and the second photoelectric switch 44 are aligned with any partition 12, and the first electric push rod 31 and the second electric push rod 41 are driven to achieve the continuity of the first conveyor belt coating release agent and calendering, and after calendering, it cools for a period of time, and the pressure plate 42 and the pressure roller move upward, so that the PVC sheet can be conveyed to the discharge port, and the partition 12 moves downward with the conveyor belt, and the sheet is demolded and moves to the second conveyor 11.

[0117] Working principle: First, the first conveyor 1 is turned on, and the partition 12 is driven to move by the first conveyor 1. When the partition 12 is aligned with the first photoelectric switch 34, the first photoelectric switch 34 controls the first electric push rod 31 to turn on, and the first electric push rod 31 drives the release agent box 32 and the paint brush 33 to move downward. The paint brush 33 contacts the first conveyor 1, and the release agent box 32 penetrates the release agent into the paint brush 33. The paint brush 33 applies the release agent on the conveyor belt of the first conveyor 1 and moves to one end. The first electric push rod 31 drives the release agent box 32 and the paint brush 33 to move upward;

[0118] After the release agent is applied, the conveyor belt moves to the bottom of the screening drum 23, and the first motor 25 and the second motor 215 are turned on at the same time. Then, the PVC particles are sucked into the screening drum 23 through the negative pressure of the feed pipe 24 by the suction fan, and the rotating rod 251 is driven to rotate by the first motor 25, and the rotating rod 251 drives the grid frame 254 to rotate. The grid frame 254 screens the PVC particles in each grid. Since the sieve holes on the first sieve plate 252 and the second sieve plate 253 gradually become smaller, large particles of PVC will be screened on the first sieve plate 252, medium particles of PVC will be screened on the second sieve plate 253, and small particles will fall on the bottom of the screening drum 23; while screening, the elliptical block 214 on the rotating shaft is driven to rotate by the second motor 215, and the elliptical block The long semi-axis 214 rotates to the vertical direction, pressing the connecting plate 212, and the connecting plate 212 drives the pillar 21 to move downward, and the pillar 21 drives the bottom plate 22 to move downward, and the bottom plate 22 drives the screening drum 23 to move downward, and the spring 211 is compressed. Then the short semi-axis of the elliptical block 214 rotates to the vertical direction. Under the action of the spring 211, the spring 211 resets upward to lift the bottom plate 22, and drives the screening drum 23 to move upward through the bottom plate 22, completing a vibration of the screening drum 23. The vibration and screening are combined to realize the function of quickly screening PVC particles, and then the first solenoid valve 28, the second solenoid valve 29 and the third solenoid valve 210 are opened accordingly, and the PVC particles of different particle sizes are discharged in coordination with the rotation of the grid frame 254;

[0119] The first conveyor 1 continues to drive the partition 12 to move until the partition 12 moves and aligns with the second photoelectric switch 44. The second photoelectric switch 44 controls the first conveyor 1 to stop. Then the particles melt on the conveyor belt, and the second electric push rod 41 is turned on. The second electric push rod 41 drives the pressure plate 42 and the pressure roller 43 to move downward. The pressure roller 43 cooperates with the roller 13 to calender the PVC particles to obtain a PVC sheet. When the first photoelectric switch 34 and the second photoelectric switch 44 are aligned with any partition 12, they will drive the first electric push rod 31 and the second electric push rod 41 to achieve the continuity of the first conveyor belt coating release agent and calendering. After calendering, it cools for a period of time, and the pressure plate 42 and the pressure roller move upward to convey the PVC sheet to the discharge port. The partition 12 moves downward with the conveyor belt, and the sheet is demolded and moves to the second conveyor 11.

[0120] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Antibacterial and wear-resistant PVC floor, characterized by: According to weight parts, it includes the following raw material components: PVC resin: 85-100 parts; Plasticizer: 40-65 parts; Stabilizer: 14-20 parts; Lubricant: 12-16 parts; Colorant: 6-14 parts; Antioxidant: 3-5 parts; Anti-impact agent: 10-20 parts; Antibacterial agent: 3-5 parts; Wear-resistant agent: 6 to 8 parts.

2. The antibacterial and wear-resistant PVC floor according to claim 1, characterized in that: The plasticizer is at least two of dioctyl phthalate, poly (2-methylbutylene succinate) or triacetin, the heat stabilizer is one or more of calcium stearate, magnesium stearate, barium stearate or zinc stearate, the lubricant is one or more of stearic acid, polyethylene wax or Fischer-Tropsch wax; the colorant is a pigment or a fuel, the antioxidant is one or more of antioxidant CA, antioxidant 264, antioxidant 2246 or antioxidant 1076, and the wear-resistant agent is a diamond wear-resistant agent.

3. A method for preparing an antibacterial and wear-resistant PVC floor, applicable to the antibacterial and wear-resistant PVC floor according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1: Weigh PVC resin and plasticizer according to the weight ratio, and put the PVC resin and plasticizer into a hot mixer for hot mixing; S2: After the hot mixing is completed, the mixed material is put into a cold mixer, and a stabilizer, a lubricant, a colorant, an antioxidant, an antibacterial agent, and an anti-impact agent are added for cold mixing to obtain a dry mixed material; S3: The dry blend is put into a twin-screw extruder, the dry blend is plasticized and formed, and then extruded. After extrusion, it is cut into granules by a rotary knife, cooled, and bagged; S4: After the cut pellets are put into the granulation system, they are transported to the granulation device by negative pressure, and granules are scattered on the conveyor belt according to different particle sizes. Then the particles are melted on the conveyor belt and formed under the pressure of the pressure roller to form PVC sheets; S5: UV antibacterial and wear-resistant treatment on the surface layer; S6: Vacuum coating the surface of PVC sheet to produce PVC floor.

4. The method for preparing the antibacterial and wear-resistant PVC floor according to claim 3, characterized in that: The hot mixing temperature in S1 is 70-150° C., and the hot mixing time is 35 minutes; the cold mixing temperature in S2 is 40° C., and the cold mixing time is 20 minutes.

5. The method for preparing the antibacterial and wear-resistant PVC floor according to claim 4, characterized in that: When the PVC sheet is formed in S4, a cooling mechanism is used to cool and shape the extruded raw material; a coating mechanism can be used to coat the surface of the conveyor belt with a release agent, which is beneficial for separating the formed PVC sheet from the conveyor belt; an adjustment mechanism can be used to adjust the distance between the conveyor belt and the pressure roller, thereby realizing the function of processing PVC sheets of different thicknesses.

6. The method for preparing the antibacterial and wear-resistant PVC floor according to claim 5, characterized in that: In the S5, the surface layer UV antibacterial and wear-resistant treatment uses a coating device to coat the surface of the PVC board with a wear-resistant agent, the wear-resistant agent is dried for 40 to 50 minutes, and then UV paint is sprayed on the surface of the PVC board and cured to obtain an antibacterial and wear-resistant PVC board.

7. The method for preparing the antibacterial and wear-resistant PVC floor according to claim 6, characterized in that: The granulating device in S4 comprises a screening drum (23); a bottom plate (22) is fixedly connected to the outer wall of the bottom of the screening drum (23); four pillars (21) are fixedly connected to the bottom plate (22); a fixed seat (2) is provided at the bottom of the screening drum (23); the pillars (21) are slidably connected to the fixed seat (2); springs (211) are sleeved on the outer sides of the pillars (21); the two ends of the springs (211) are respectively fixedly connected to the fixed seat (2) and the bottom plate (22); a connecting plate (212) is fixedly connected between two adjacent pillars (21); two fixed plates (213) are fixedly connected to the two ends of the bottom of the fixed seat (2); an elliptical block (214) is rotatably connected between the two fixed plates (213) via a rotating shaft; a second motor (215) is fixedly connected to two opposite fixed plates (213); the output shafts of the second motor (215) are respectively fixedly connected to the rotating shaft; The screening drum (23) is provided with a screening mechanism; the screening mechanism comprises a first screen plate (252) and a second screen plate (253) which are fixedly connected to the inner wall of the screening drum (23) from top to bottom, and the screen holes on the first screen plate (252) and the second screen plate (253) gradually become smaller; a first motor (25) is fixedly connected to the top of the screening drum (23); the output shaft of the first motor (25) passes through the top of the screening drum (23) and is fixedly connected to a rotating rod (251); the rotating rod (251) is rotatably connected to the first screen plate (252) and the second screen plate (253) through a bearing, and three grid frames (254) are fixedly connected to the outer wall of the rotating rod (251), and the three grid frames (254) are fixedly connected to the outer wall of the rotating rod (251). The bottom of the grid frame (254) is in contact with the first sieve plate (252) and the second sieve plate (253) respectively; the outer wall of the screening cylinder (23) is connected and fixedly connected with the first discharge pipe (26) and the second discharge pipe (27); the first discharge pipe (26) is aligned with the first sieve plate (252), and the outer wall of the first discharge pipe (26) is installed with a first solenoid valve (28); the second discharge pipe (27) is aligned with the second sieve plate (253), and the outer wall of the second discharge pipe (27) is installed with a second solenoid valve (29); the bottom of the screening cylinder (23) is installed with a third solenoid valve (210); the top of the screening cylinder (23) is connected and fixedly connected with a feed pipe (24).

8. The method for preparing the antibacterial and wear-resistant PVC floor according to claim 7, characterized in that: A first conveyor (1) is provided below the fixed seat (2); a second conveyor (11) is provided on a side of the first conveyor (1) away from the fixed seat (2); six partitions (12) are evenly fixedly connected to the conveyor belt of the first conveyor (1); a first mounting frame (3) is fixedly connected to one end of the first conveyor (1) close to the fixed seat (2); a first electric push rod (31) is fixedly connected to the top of the first mounting frame (3); a demoulding agent box (32) is fixedly connected to the output end of the first electric push rod (31); a paint brush (33) is movably installed below the demoulding agent box (32); a first photoelectric switch (34) is installed on the inner side wall of the first conveyor (1); the first photoelectric switch (34) is electrically connected to the first electric push rod (31); the first conveyor (1) is fixedly connected to a second mounting frame (4) at one end away from the fixed seat (2); the second mounting frame (4) is fixedly connected to the top of the second mounting frame (4); the output end of the second electric push rod (41) is fixedly connected to a pressure plate (42); a plurality of pressure rollers (43) are rotatably connected to the lower side of the pressure plate (42); a plurality of rollers (13) are rotatably connected to the first conveyor (1); the pressure rollers (43) cooperate with the rollers (13); a second photoelectric switch (44) is installed on the inner side wall of the first conveyor (1); the second photoelectric switch (44) is electrically connected to the second photoelectric switch (44).

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