CN111171448A - Sterilization film-coated plastic plate and preparation method and application thereof - Google Patents
Sterilization film-coated plastic plate and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a sterilization film-coated plastic plate which is characterized in that at least one surface of the sterilization film-coated plastic plate is coated with sterilizationThe sterilizing film comprises a sterilizing nano composite material, wherein the sterilizing nano composite material consists of fine particles with the particle size of 30-50 nm, and comprises 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide in percentage by weight. The sterilization film-coated plastic plate is covered on the surface of the plate, so that the sterilization film-coated plastic plate has strong sterilization capability, and the number of viable bacteria obtained by placing the sterilization film-coated plastic plate for 24 hours after detection and inoculation of an authoritative institution is less than 1cfu/cm2The residual number of bacteria on the surface is almost 0, the sterilization rate is close to 100 percent, and the method can be applied to the inner container of the refrigerator.
Description
Technical Field
The invention belongs to the technical field of new plastic materials, and particularly relates to a sterilization film-coated plastic plate and a preparation method and application thereof.
Background
Because the plastic has the characteristics of easy forming, light weight, stability and the like, the plastic is a manufacturing raw material of various daily necessities, particularly in the environment which is easy to be wet such as bathrooms, kitchens, hospitals and the like, the plastic plate is an intermediate product for processing downstream products, for example, an inner container of a refrigerator, namely PS and ABS plastic particles are firstly melted and pressed into a plate, and then the plate is formed on a mould by plastic suction. Plastic sheets are widely used as more ideal materials. However, the plastic plate has the natural defect that bacteria and mold are easy to grow on the surface of the plastic plate, and the plastic plate is a nutrient source for the growth and propagation of microorganisms. Most plastic sheet products do not have additional functions of antibiosis, deodorization or purification and the like, and have the defects of easy bacteria breeding, color change or peculiar smell generation after long-term use, although the market has brand plastic sheet products with the antibacterial function, such as an antibacterial chopping board, an antibacterial medical apparatus, an antibacterial refrigerator and the like, most of the products are prepared by mixing an antibacterial agent and common plastic particles to prepare antibacterial master batches, when the plastic products are processed, the master batches and the common particles are blended according to a certain proportion, and the whole plastic products are provided with antibacterial components. In addition, the situation of uneven distribution of the antibacterial agent is easy to occur when the antibacterial agent is directly added into the plastic raw material, and the prepared plastic product has the antibacterial agent distributed only in certain local areas, and bacteria are still easy to adhere to the areas without the antibacterial agent, so that the antibacterial effect of the plastic product is incomplete and needs to be improved. Meanwhile, if the surface of the plate cannot be sterilized and only can be antibacterial, bacteria can quickly live on the plastic and gradually permeate into the plastic, and the bacteria can never be removed. Therefore, the development of a more economical and efficient sterilization coated plastic plate is needed.
Disclosure of Invention
Based on the above, the invention provides a sterilization coated plastic plate and a preparation method and application thereof, and aims to provide the sterilization coated plastic plate, wherein a sterilization film is covered on the surface of the plate, so that the sterilization coated plastic plate has strong sterilization capability, and the sterilization coated plastic plate is tested by an authority and placed for 24 hours to obtain the number of viable bacteria smaller than 1cfu/cm2The number of bacteria remaining on the surface was almost 0, and the sterilization rate was close to 100%. Meanwhile, in the process of processing the plate into the plastic product, the film and the plate are stretched and expanded synchronously to ensure that the plastic product is covered with the film, the plastic product is formed in one step, the film and the plate are integrated and cannot be peeled off, and the cost of the sterilizing material is saved.
In order to achieve the purpose, the invention adopts the technical scheme that:
the sterilization film-coated plastic plate comprises a bottom plate and a sterilization film, wherein the sterilization film is coated on at least one surface of the bottom plate, the sterilization film comprises a sterilization nano composite material, and the sterilization nano composite material comprises fine particles with the particle size of 30-50 nm, and the content of the fine particles is 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide in percentage by weight.
The technical scheme of further improvement in the technical scheme of the sterilization film-coated plastic plate is as follows:
1. in the technical scheme, the sterilization film is coated on the two sides of the bottom plate of the sterilization film-coated plastic plate.
2. In the technical scheme, the sterilization film comprises the following components in percentage by weight:
50-80% of bactericidal plastic master batch,
15 to 49 percent of common plastic particles,
1 to 5 percent of additive,
the sterilization plastic master batch is composed of 95-99% of plastic powder and 1-5% of the sterilization nano composite material.
3. In the technical scheme, the additive is methyl silicone oil.
4. In the technical scheme, the plastic powder of the sterilization plastic master batch is one or more of polyethylene, polypropylene, polystyrene, polyvinyl chloride and ABS plastic.
5. In the technical scheme, the bottom plate material of the sterilization coated plastic plate and the plastic powder material of the sterilization plastic master batch are made of the same plastic.
6. In the technical scheme, the thickness of the sterilization film covered on the surface of the sterilization film-covered plastic plate is 5-100 mu m.
7. In the technical scheme, the whole thickness of the sterilization coated plastic plate is 1-20 mm.
The technical scheme adopted by the invention is as follows: a preparation method of a sterilization film-coated plastic plate is characterized in that an extrusion film-coating machine is adopted, a base plate is extruded and molded, meanwhile, a sterilization film in a hot melting state is attached to the base plate, and the sterilization film and the base plate are cooled and then fused into a whole to form the integrated sterilization film-coated plastic plate.
1. In the technical scheme, the preparation method of the sterilization film-coated plastic plate comprises the following steps:
s01, crushing the sterilized plastic master batch into powder;
s02, crushing common plastic particles into powder;
s03, preparing adhesive emulsion by using the additive and water;
s04, stirring and mixing the crushed sterilized plastic master particle powder, the crushed common plastic particle powder and the bonding emulsion at a high speed to obtain a sterilized membrane mixture, and extruding to obtain a sterilized membrane;
and S05, adding the mixture obtained in the step S04 into an extrusion film covering machine, extruding and forming a bottom plate, simultaneously attaching a hot-melt sterilization film on the bottom plate, cooling and then fusing the sterilization film and the bottom plate into a whole to form the integrated sterilization film-covered plastic plate.
1. In the above technical solution, in the step S03, the additive is methyl silicone oil.
2. In the above technical solution, the weight ratio of the additive to water in step S03 is 1: 1.
3. in the above technical solution, in the step S05, the heat treatment is performed to the film while the sterilization film in a hot-melt state is attached to the base plate. The water in the emulsion in the formula is evaporated through heating treatment, so that an ultrathin film which is not easy to achieve by other conventional methods is formed, a large number of tiny holes are formed on the surface of the film, and the contact area with bacteria is increased.
4. In the above technical solution, the sterilization plastic masterbatch in the step S01 is crushed into 100-200 meshes.
5. In the above technical solution, the common plastic particles are crushed to 100-200 meshes in step S02.
The application of the sterilization film-coated plastic plate in plastic products.
1. The sterilizing film-coated plastic plate is applied to the plastic inner container of the refrigerator.
2. The application of the sterilization film-coated plastic plate in plastic products is used as an internal decorative plate in clean spaces such as medical operating rooms, sickrooms, food and drug production plants, high-tech electronic product production workshops and the like.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the sterilization film of the sterilization film-coated plastic plate is covered on the surface of the plate, so that the sterilization film-coated plastic plate has strong sterilization capability, bacteria can never survive and can not penetrate through the sterilization film-coated plastic plate, and the sterilization film-coated plastic plate is placed after being tested and inoculated by an authority mechanismThe number of viable bacteria obtained after standing for 24 hours is less than 1cfu/cm2The number of bacteria remaining on the surface was almost 0, and the sterilization rate was close to 100%.
2. The preparation method of the sterilization film-coated plastic plate adopts an extrusion film-coating machine, the sterilization film in a hot melting state is attached to the bottom plate while the bottom plate is extruded and molded, and the sterilization film and the bottom plate are cooled and then fused into a whole to form the integrated sterilization film-coated plastic plate.
3. According to the preparation method of the sterilization film-coated plastic plate, in the process of processing the plate by using machine equipment, water in emulsion in a formula is evaporated by modifying and heating a film-forming part, so that an ultrathin film which is not easy to realize by other conventional methods is formed, a large number of tiny holes are formed on the surface of the film, and the contact area with bacteria is increased.
Drawings
FIG. 1 is a flow chart of a method for preparing the sterilization coated plastic sheet material of the present invention.
FIG. 2 is a flow chart of the preparation method of the bactericidal plastic master batch of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a flow chart of a preparation method of the bactericidal coated plastic sheet material, and fig. 2 is a flow chart of a preparation method of the bactericidal plastic master batch.
The following describes embodiments of the present invention with reference to FIGS. 1 to 2.
Example 1
The preparation method of the sterilization film-coated plastic plate comprises the following steps:
s01, crushing the sterilization plastic master batch to 100-200 meshes; the high-density polypropylene sterilization plastic master batch is prepared by the following steps:
step one, weaving and rolling metal silver, copper and zinc wires into a metal wire rod; the composite metal wire rod is used as an anode conductor of a direct current power supply, and an electric arc is formed between the composite metal wire rod and a cathode, so that the tip of the composite metal wire rod used as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and silver metal atoms are fully mixed with copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 70% of silver, 15% of copper oxide and 15% of zinc oxide in percentage by weight; the nano composite material powder forms a soft aggregate of 40 microns, is composed of fine particles with the particle size of 30 nm-50 nm, and is a compound of silver, copper oxide and zinc oxide. The nano composite material prepared by gasification evaporation, mixing and cooling does not need chemical raw materials such as acid, alkali and the like, and does not contain pollutants such as waste water, waste gas, waste residue and the like; the production process is simple and controllable, the energy consumption is low, the large-scale production is convenient, the cleanliness of the product is high, and the quality is guaranteed.
Step two, crushing and thinning the high-density polypropylene into powder of 200-500 meshes; the plastic material particles are thinned, so that the uniform distribution of the nano composite material in a plastic system is facilitated, and the sterilization effect of the nano composite material is further improved.
Dispersing the nano composite material obtained in the step one in water, and repeatedly impacting and dispersing the nano composite material for 60min by using variable frequency ultrasonic equipment at the ultrasonic frequency of 40-120K to obtain a nano composite material suspension;
step four, stirring the nano composite material suspension obtained in the step three and the high-density polypropylene powder obtained in the step S02 at a high speed, and uniformly mixing to enable the dispersed nano composite material particles to be attached to and wrapped on the surfaces of the high-density polypropylene powder particles; wherein the high-density polypropylene powder accounts for 96 percent, and the sterilizing nano composite material accounts for 4 percent;
and step five, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the sterilization plastic master batch.
S02, crushing the high-density polypropylene particles to 100-200 meshes to obtain high-density polypropylene plastic powder;
s03, preparing an adhesive emulsion by using methyl silicone oil and water; the weight ratio of the additive to the water is 1: 1.
s04, stirring and mixing the crushed sterilized plastic powder 50%, the high-density polypropylene powder 45% and the methyl silicone oil emulsion 5% at a high speed to obtain a mixture;
and S05, adding the mixture obtained in the step S04 into an extrusion film covering machine, extruding and forming a bottom plate, simultaneously attaching a hot-melt sterilization film on the bottom plate, cooling and then fusing the sterilization film and the bottom plate into a whole to form the integrated sterilization film-covered plastic plate. In the process of processing the plate by machine equipment, water in emulsion in a formula is evaporated by modifying and heating a film forming part of an extrusion film covering machine to form an ultrathin film which is difficult to realize by other conventional methods, the whole thickness of the sterilization film-covered plastic plate is 3mm, the thickness of a sterilization film covered on the surface of a bottom plate of the sterilization film-covered plastic plate is 10 mu m, and the sterilization film-covered plastic plate is made of high-density polypropylene.
Example 2
The preparation method of the sterilization film-coated plastic plate comprises the following steps:
s01, crushing the sterilization plastic master batch into 100-200 meshes; the bactericidal plastic master batch is prepared by the following steps:
step one, weaving and rolling metal silver, copper and zinc wires into a metal wire rod; the composite metal wire rod is used as an anode conductor of a direct current power supply, and an electric arc is formed between the composite metal wire rod and a cathode, so that the tip of the composite metal wire rod used as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and silver metal atoms are fully mixed with copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 70% of silver, 15% of copper oxide and 15% of zinc oxide in percentage by weight; the nano composite material powder forms a soft aggregate of 40 microns, is composed of fine particles with the particle size of 30 nm-50 nm, and is a compound of silver, copper oxide and zinc oxide.
Step two, crushing and thinning the high-density polypropylene and the high-density polyethylene into powder of 200-500 meshes; the weight ratio of the high-density polypropylene to the high-density polyethylene is 1: 1.
Dispersing the nano composite material obtained in the step one in water, adding coloring titanium dioxide, and repeatedly impacting and dispersing the nano composite material for 60min by using frequency conversion ultrasonic equipment at the ultrasonic frequency of 40-120K to obtain a nano composite material suspension;
step four, stirring the nano composite material suspension obtained in the step three and the high-density polypropylene and high-density polyethylene mixed powder obtained in the step S02 at a high speed, and uniformly mixing to enable the dispersed nano composite material particles to be attached to and wrapped on the surfaces of the high-density polypropylene and high-density polyethylene mixed powder particles; wherein the mixed powder of the high-density polypropylene and the high-density polyethylene accounts for 96 percent, the sterilizing nano composite material accounts for 2 percent, and the coloring titanium dioxide accounts for 2 percent;
and step five, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the sterilization plastic master batch.
S02, mixing and crushing the high-density polypropylene and high-density polyethylene plastic particles according to the weight ratio of 1:1 to obtain 100-200 meshes of mixed plastic powder;
s03, preparing an adhesive emulsion by using methyl silicone oil and water; the weight ratio of the additive to the water is 1: 1.
s04, stirring and mixing 80% of crushed bactericidal plastic powder, 18% of mixed plastic powder and 2% of methyl silicone oil emulsion at high speed to obtain a mixture;
and S05, adding the mixture obtained in the step S04 into an extrusion film covering machine, extruding and forming a bottom plate, simultaneously attaching a hot-melt sterilization film on the bottom plate, cooling and then fusing the sterilization film and the bottom plate into a whole to form the integrated sterilization film-covered plastic plate. The whole thickness of the sterilization film-coated plastic plate is 5mm, the thickness of the sterilization film coated on the surface of the bottom plate is 20 mu m, and the material of the plate is the same as that of the sterilization plastic master batch.
Example 3
The preparation method of the sterilization film-coated plastic plate comprises the following steps:
s01, crushing the sterilized polyvinyl chloride plastic master batch into 100-200 meshes; the bactericidal polyvinyl chloride plastic master batch is prepared by the following steps:
step one, weaving and rolling metal silver, copper and zinc wires into a metal wire rod; the composite metal wire rod is used as an anode conductor of a direct current power supply, and an electric arc is formed between the composite metal wire rod and a cathode, so that the tip of the composite metal wire rod used as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and silver metal atoms are fully mixed with copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 80% of silver, 10% of copper oxide and 10% of zinc oxide in percentage by weight; the nano composite material powder forms a soft aggregate of 40 microns, is composed of fine particles with the particle size of 30 nm-50 nm, and is a compound of silver, copper oxide and zinc oxide.
Step two, crushing and thinning the polyvinyl chloride into powder of 200-500 meshes;
dispersing the nano composite material obtained in the step one in water, and repeatedly impacting and dispersing the nano composite material for 60min by using variable frequency ultrasonic equipment at the ultrasonic frequency of 40-120K to obtain a composite nano material suspension;
step four, stirring the nano composite material suspension obtained in the step three and the polyvinyl chloride powder obtained in the step S02 at a high speed, and uniformly mixing to enable the dispersed nano composite material particles to be attached to and wrapped on the surfaces of the polyvinyl chloride powder particles; wherein the polyvinyl chloride powder accounts for 98 percent, and the sterilizing nano composite material accounts for 2 percent;
and step five, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the sterilization plastic master batch.
S02, crushing the polyvinyl chloride plastic particles to 100-200 meshes to obtain polyvinyl chloride plastic powder;
s03, preparing an adhesive emulsion by using methyl silicone oil and water; the weight ratio of the additive to the water is 1: 1.
s04, stirring and mixing the crushed bactericidal plastic powder 60%, the common plastic powder 37% and the methyl silicone oil emulsion 3% at a high speed to obtain a mixture;
and S05, adding the mixture obtained in the step S04 into an extrusion film covering machine, extruding and forming a bottom plate, simultaneously attaching a hot-melt sterilization film on the bottom plate, cooling and then fusing the sterilization film and the bottom plate into a whole to form the integrated sterilization film-covered plastic plate. The whole thickness of the sterilization film-coated plastic plate is 7mm, the thickness of the sterilization film coated on the surface of the bottom plate is 30 mu m, and the bottom plate is made of polyvinyl chloride.
Example 4
A preparation method of a sterilization film-coated plastic plate comprises the following steps:
s01, crushing the plastic grains to 200-500 meshes; the bactericidal ABS plastic master batch is prepared by the following steps:
weaving and rolling metal silver, copper and zinc wires into a metal wire rod, taking the composite metal wire rod as an anode conductor of a direct-current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod serving as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and the silver metal atoms are fully mixed with copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 65% of silver, 25% of copper oxide and 10% of zinc oxide in percentage by weight; the nano composite material powder forms a soft aggregate of 40 microns, is composed of fine particles with the particle size of 30 nm-50 nm, and is a compound of silver, copper oxide and zinc oxide.
Step two, crushing and thinning the ABS plastic into powder of 200-500 meshes; the weight ratio of the ABS plastic to the polyvinyl chloride is 1: 2.
Injecting a proper amount of ultra-pure water into the ultrasonic container, wherein the liquid level is not lower than the minimum limit of the working requirement of the ultrasonic transducer; starting a stirring motor (the motor is a variable-frequency speed reduction motor with low rotating speed and large torsion), controlling the rotating speed of the motor to be less than 100 revolutions per minute, and adding the nano composite material powder to ensure that the nano composite material is fully contacted with water on the basis that liquid does not form a minimum vortex lower than the working requirement of the ultrasonic transducer; forming a suspension of the nano material, starting ultrasonic waves, working at a lower frequency, setting the process to be carried out in sequence from low frequency to high frequency of 40K-60K-80K-100K-120K, wherein the working time of each frequency is 5min, and then carrying out two cycles from high frequency to low frequency, and the total time is 100 min. Gradually dispersing the body to present independent nano particles; the nano composite material is added into plastic powder, and the nano composite material is uniformly distributed in a plastic matrix, so that the plastic product prepared by the plastic master batch has the distribution of the nano composite material in the whole area, and the sterilization effect of the plastic product is complete.
Step four, stirring the nano composite material suspension obtained in the step three and the ABS plastic powder obtained in the step S02 at a high speed, and uniformly mixing to enable the dispersed nano composite material particles to be attached to and wrapped on the surfaces of the ABS plastic and polyvinyl chloride mixed powder particles; 98% of ABS plastic and 2% of sterilizing nano composite material;
and step five, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the sterilization plastic master batch.
S02, crushing the ABS plastic particles to 100-200 meshes to obtain ABS plastic powder;
s03, preparing an adhesive emulsion by using methyl silicone oil and water; the weight ratio of the additive to the water is 1: 1.
s04, stirring and mixing the crushed sterilization plastic master batch powder 70%, the ABS plastic powder 28% and the methyl silicone oil emulsion 2% at a high speed to obtain a mixture;
and S05, adding the mixture obtained in the step S04 into an extrusion film covering machine, extruding and forming a bottom plate, simultaneously attaching a hot-melt sterilization film on the bottom plate, cooling and then fusing the sterilization film and the bottom plate into a whole to form the integrated sterilization film-covered plastic plate. The whole thickness of the sterilization film-coated plastic plate is 7mm, the thickness of the sterilization film coated on the surface of the bottom plate is 30 mu m, and the sterilization film-coated plastic plate is made of ABS plastic.
The sterilized coated plastic sheet of examples 1 to 4 was subjected to blister processing to prepare a refrigerator inner container member.
And (3) carrying out plastic sucking processing on the high-density polypropylene plastic plate to prepare the refrigerator liner component to obtain the comparative example 1.
The antibacterial performance of the refrigerator inner container part is detected according to GB/T31402-2015, and the antibacterial performance is shown in Table 1:
TABLE 1
Tests show that the bactericidal coated plastic plate in the embodiment 1-4 has good antibacterial performance and the antibacterial rate is more than 99%, and the number of viable bacteria obtained by the bactericidal coated plastic plate is less than 1cfu/cm after being inoculated and placed for 24 hours through detection of an authoritative institution2The number of bacteria remaining on the surface was almost 0, and the sterilization rate was close to 100%.
In conclusion, the sterilization film of the sterilization film-coated plastic plate disclosed by the invention covers the surface of the plate, so that the sterilization film-coated plastic plate has strong sterilization capability, bacteria can never survive and can not penetrate through the sterilization film-coated plastic plate, and the number of viable bacteria obtained by placing the sterilization film-coated plastic plate for 24 hours after the sterilization film-coated plastic plate is tested and inoculated by an authoritative institution and then is less than 1cfu/cm2The residual number of bacteria on the surface is almost 0, the sterilization rate is close to 100 percent, and the method can be applied to inner container plates of refrigerators. The preparation method of the sterilization film-coated plastic plate adopts an extrusion film-coating machine, the sterilization film in a hot melting state is attached to the bottom plate while the bottom plate is extruded and molded, and the sterilization film and the bottom plate are cooled and then fused into a whole to form the integrated sterilization film-coated plastic plate. The invention relates to a preparation method of a sterilization film-coated plastic plate, which comprises the steps of refitting and heating a film-forming part in the process of processing the plate by machine equipmentAnd (3) treatment, namely evaporating water in the emulsion in the formula to form an ultrathin membrane which is not easy to realize by other conventional methods, and simultaneously forming a large number of tiny holes on the surface of the membrane to increase the contact area with bacteria.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (17)
1. The sterilization film-coated plastic plate is characterized by comprising a base plate and a sterilization film, wherein the sterilization film is coated on at least one surface of the base plate, the sterilization film comprises a sterilization nano composite material, and the sterilization nano composite material comprises fine particles with the particle size of 30-50 nm, and comprises, by weight, 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide.
2. The bactericidal coated plastic board as claimed in claim 1, wherein the bactericidal film is coated on both sides of the bottom board of the bactericidal coated plastic board.
3. The bactericidal coated plastic sheet material as claimed in claim 1, wherein the bactericidal film comprises the following components in percentage by weight:
50-80% of bactericidal plastic master batch,
15 to 49 percent of common plastic particles,
1 to 5 percent of additive,
the sterilization plastic master batch is composed of 95-99% of plastic powder and 1-5% of the sterilization nano composite material.
4. The bactericidal coated plastic sheet material as claimed in claim 3, wherein the additive is methyl silicone oil.
5. The bactericidal coated plastic sheet material according to claim 3, wherein the plastic powder of the bactericidal plastic master batch is one or more of polyethylene, polypropylene, polystyrene, polyvinyl chloride and ABS plastic.
6. The bactericidal coated plastic board according to claim 5, wherein the bottom plate of the bactericidal coated plastic board is made of the same plastic as the plastic powder of the bactericidal plastic master batch.
7. The bactericidal coated plastic plate as claimed in claim 1, wherein: the thickness of the sterilization film coated on the surface of the sterilization film coated plastic plate is 5-100 mu m.
8. The bactericidal coated plastic plate as claimed in claim 1, wherein: the whole thickness of the sterilization film-coated plastic plate is 1-20 mm.
9. The method for preparing the sterilization coated plastic plate as claimed in claim 1, wherein an extrusion coating machine is adopted, the sterilization film in a hot melting state is attached to the bottom plate while the bottom plate is extruded and molded, and the sterilization film and the bottom plate are cooled and then fused together to form the integrated sterilization coated plastic plate.
10. The preparation method of the bactericidal coated plastic plate as claimed in claim 9, which is characterized by comprising the following steps:
s01, crushing the sterilized plastic master batch into powder;
s02, crushing common plastic particles into powder;
s03, preparing adhesive emulsion by using the additive and water;
s04, stirring and mixing the crushed sterilized plastic master batch powder, the common plastic powder and the bonding emulsion at a high speed to obtain a mixture;
and S05, adding the mixture obtained in the step S04 into an extrusion film covering machine, extruding and forming a bottom plate, simultaneously attaching a hot-melt sterilization film on the bottom plate, cooling and then fusing the sterilization film and the bottom plate into a whole to form the integrated sterilization film-covered plastic plate.
11. The method for preparing the bactericidal coated plastic sheet material as claimed in claim 10, wherein the additive is methyl silicone oil in step S03.
12. The method for preparing the sterilization coated plastic sheet material according to claim 10, wherein the sterilization plastic master batch in the step S01 is crushed into 100-200 meshes.
13. The method for preparing a plastic sheet with a bactericidal coating according to claim 10, wherein the common plastic particles are crushed to 100-200 meshes in step S02.
14. The method for manufacturing a sterilization-coated plastic sheet according to claim 10, wherein the step S05 is performed by heating the sterilization film while attaching the film in a hot-melt state to the base sheet.
15. The use of the bactericidal coated plastic sheet material of claim 1 in plastic products.
16. The application of the sterilization film-coated plastic plate in plastic products as claimed in claim 15, wherein the sterilization film-coated plastic plate is applied as a plastic inner container of a refrigerator.
17. The use of the sterilization-coated plastic sheet material as claimed in claim 15 in plastic products, wherein the sheet material is used as an interior decoration sheet material for clean spaces in medical operating rooms and wards, food and drug manufacturing plants, and high-tech electronic product manufacturing plants.
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