CN108504125A - Wood-plastic clad plate and preparation method thereof with bactericidal effect - Google Patents

Abstract

The invention provides a wood-plastic composite board with a bactericidal effect, which comprises the following raw material components in parts by weight: 60-65 parts of polyvinyl chloride, 15-20 parts of polypropylene, 60-65 parts of wood powder, and 13 parts of calcite powder ‑15 parts, 10‑12 parts of talcum powder, 10‑12 parts of diatomaceous earth, 3‑5 parts of polyethylene wax, 1‑2 parts of hokutou stone powder, 0.1‑0.5 parts of titanium dioxide, 2‑3 parts of pine needle powder, pomelo 1.5-2 parts of corticosteroids, 1-1.5 parts of lemongrass, 2-2.5 parts of apple eucalyptus leaves, 0.5-1 parts of lemon eucalyptus leaves, 2-3 parts of naked flower purple pearl, 1.5-2 parts of holly leaves, coupling agent 0.3 ‑0.5 parts, 4‑6 parts of stabilizer, 2.5‑4.5 parts of compatibilizer, 0.5‑1 part of ultraviolet absorber. The wood-plastic composite board of the present invention has excellent mechanical properties, antibacterial, sterilizing and anti-mildew properties, has multiple functions, and is an interior decoration material with excellent comprehensive properties.

Description

Wood-plastic composite board with bactericidal effect and preparation method thereof

technical field

The invention relates to the field of composite materials, in particular to a wood-plastic composite board with bactericidal effect and a preparation method thereof.

Background technique

Wood-plastic composite material is a composite profile mainly made of wood or cellulose as the base material and plastic. Wood-plastic composite material has the advantages of woody feeling of solid wood material and weather resistance and microbial resistance of plastic matrix. And during use, it will not emit gases that are harmful to human health, that is, it will not pollute the environment, and the material itself can be reused. It is a brand-new green product and an ecologically clean composite material.

At present, wood-plastic composite materials have begun to replace solid wood and are widely used in various fields, most commonly used in the field of building decoration, and wood materials for construction need to have excellent anti-corrosion and anti-bacterial corrosion capabilities. Although wood fibers in wood-plastic composites are coated in a plastic matrix, they have better anti-microbial degradation ability than natural wood, but due to the large difference in surface polarity between wood fibers and plastics, even if added in composite processing Without a compatibilizer, there are still a large number of pores on the two-phase interface inside the material, and the pores are usually interconnected. Wood fibers absorb water through these pores and will be contaminated by microorganisms and then degraded by microorganisms. Microorganisms will reproduce inside the material. , eventually leading to structural damage and corrosion of the material.

In addition, with the development of society, people's demand for multifunctional materials is increasing, but most of the existing wood-plastic composite materials have single functions and only have simple decorative effects, which can no longer meet people's requirements.

Therefore, in order to more efficiently inhibit the growth of mold and bacteria, resist the erosion of foreign microorganisms, and perform other beneficial functions while being antibacterial, it is necessary to develop a multifunctional wood-plastic composite material with excellent antiseptic and antibacterial functions. Applications of wood-plastic composites.

Contents of the invention

In view of this, the present invention provides a wood-plastic composite board with excellent performance and bactericidal effect. The wood-plastic composite board has a natural fragrance and can repel mosquitoes. , not only can inhibit the growth of mold and bacteria, resist the erosion of foreign microorganisms, but also release bactericidal substances into the air to kill bacteria and viruses in the air, and prevent the occurrence and spread of diseases. At the same time, the wood-plastic composite board of the present invention can also release active ingredients with calming and calming functions, and can also absorb and remove formaldehyde to reduce the release of formaldehyde. Using the wood-plastic composite board of the present invention for interior decoration can build a more comfortable environment for people. Suitable environment for working and living.

The wood-plastic composite board with bactericidal effect provided by the present invention comprises the following raw material components in parts by weight: 60-65 parts of polyvinyl chloride, 15-20 parts of polypropylene, 60-65 parts of wood powder, and 13-20 parts of calcite powder. 15 parts, 10-12 parts of talcum powder, 10-12 parts of diatomaceous earth, 3-5 parts of polyethylene wax, 1-2 parts of Beitou stone powder, 0.1-0.5 parts of titanium dioxide, 2-3 parts of pine needle powder, pomelo peel 1.5-2 parts of vegetable, 1-1.5 parts of lemongrass, 2-2.5 parts of apple eucalyptus leaves, 0.5-1 parts of lemon eucalyptus leaves, 2-3 parts of naked flower purple pearl, 1.5-2 parts of holly leaves, 0.3-2 parts of coupling agent 0.5 parts, 4-6 parts of stabilizer, 2.5-4.5 parts of compatibilizer, 0.5-1 part of ultraviolet absorber;

Further, by weight, the following raw material components are included: 62 parts of polyvinyl chloride, 18 parts of polypropylene, 63 parts of wood flour, 14 parts of calcite powder, 11 parts of talcum powder, 11 parts of diatomaceous earth, 4 parts of polyethylene wax , 1.5 parts of hokuto stone powder, 0.3 parts of titanium dioxide, 2.5 parts of pine needle powder, 1.7 parts of naringenin, 1.3 parts of lemongrass, 2.2 parts of apple eucalyptus leaves, 0.7 parts of lemon eucalyptus leaves, 2.5 parts of naked flower purple pearls, 1.8 parts of holly leaves part, 0.4 part of coupling agent, 5 parts of stabilizer, 3.5 parts of compatibilizer, 0.7 part of ultraviolet absorber;

Further, the stabilizer is made by mixing zinc stearate and calcium stearate in a mass ratio of 1:3;

Further, the compatibilizer is made by mixing ethylene acrylic acid and maleic anhydride grafted polypropylene in a mass ratio of 3:1;

Further, the coupling agent is one or a mixture of silane coupling agents, titanate coupling agents, and aluminate coupling agents;

Further, the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, hokutolite powder, titanium dioxide, and pine needle powder is 1000-1200 mesh;

Further, the ultraviolet absorber is one or a mixture of ultraviolet absorbers UV-P, ultraviolet absorbers UV-531, and ultraviolet absorbers UV-327.

The invention also discloses a method for preparing the wood-plastic composite board with bactericidal effect, comprising the following steps:

a. Take dried lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves, mix and grind them, soak them in an appropriate amount of 85% alcohol for 1-2 hours, then add wood powder, calcite powder, talcum powder, Diatomaceous earth, pine needle powder and naringenin were stirred for 0.5h, then dried at 100°C, and the dried solids were collected and crushed into powders with a particle size of more than 1000 mesh;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, pre-mix for 8-10 minutes at 70-80°C, and then add polyvinyl chloride, polypropylene, polyethylene Wax, compatibilizer, stabilizer and ultraviolet absorber, and heated to 115-120 ° C, mixed for 10-15 minutes, and then cooled to 50-60 ° C to obtain a mixture;

c. Put the mixture obtained in step b into a twin-screw extruder, melt-extrude and granulate at a granulation temperature of 140-180° C. and a screw speed of 155-160 rpm to obtain wood-plastic pellets;

d. Place the wood-plastic pellets prepared in step c in a hot press, and perform hot pressing at a temperature of 190-200°C and a pressure of 8-10 MPa for 15-18 minutes, and then The wood-plastic composite board with bactericidal effect can be obtained by cooling and shaping in a cold press.

Beneficial effects of the present invention:

The present invention adopts polypropylene synergistically with polyvinyl chloride as the basic plastic, matches appropriate amount of wood powder and other functional components, and adopts suitable compatibilizer, coupling agent, etc., and then goes through a specific preparation process to make each raw material component To achieve better integration, so as to give full play to the mutual synergy between the various raw material components, to achieve a synergistic effect, to prepare a wood-plastic composite board with a natural fragrance, and the prepared wood-plastic composite board not only has Excellent mechanical properties, also has excellent antibacterial, sterilizing and anti-mildew properties, can inhibit the growth of mold and bacteria, resist the erosion of foreign microorganisms, and can release active ingredients with bactericidal function, which can kill bacteria and viruses in the air function, and then play a role in preventing the occurrence and spread of diseases. At the same time, the wood-plastic composite board of the present invention can also release active ingredients with calming and calming functions, and can also absorb and remove formaldehyde to reduce the release of formaldehyde. Using the wood-plastic composite board of the present invention for interior decoration can build a more comfortable environment for people. Suitable environment for working and living. Among them, diatomaceous earth has excellent adsorption function due to its special porous structure, and can absorb and remove formaldehyde; Odor function, pine needle powder, naringenin, lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves can release active ingredients with antibacterial and anti-mold effects, and these ingredients are formulated in specific amounts Finally, it can greatly increase the killing effect on bacteria and molds, effectively inhibit the growth of molds and bacteria, and resist the erosion of foreign microorganisms; pine needle powder and naringenin can also release active ingredients with calming and calming effects, which are similar to northern Under the synergistic effect of the negative ions released by the stone powder, it can better play the role of calming the nerves, eliminating fatigue and burnout; lemongrass, apple eucalyptus, lemon eucalyptus and nude flower purple pearl also have natural fragrance, which can refresh the body. The effect of air can also repel mosquitoes; diatomaceous earth can also cooperate with talcum powder and calcite powder as the filling material of basic plastics to improve the comprehensive mechanical properties of wood-plastic panels; talcum powder can also cooperate with polyethylene wax and zinc stearate , calcium stearate, etc., to improve processability and facilitate better processing of materials; and the addition of compatibilizers and coupling agents can effectively improve the compatibility between polyvinyl chloride and polypropylene, the plastic matrix and wood Compatibility, dispersibility, etc. between powder and other functional components; while stabilizers and UV absorbers can improve the thermal stability and light stability of the matrix plastic, and so on.

The wood-plastic composite board prepared by the invention is an interior decoration material with excellent comprehensive performance in functionality, practicability and decoration, has multiple functions, and the raw materials used are low in price, non-toxic and harmless, and is very suitable for interior decoration. Has broad market prospects.

Detailed ways

This embodiment provides a wood-plastic composite board with a bactericidal effect, comprising the following raw material components in parts by weight: 60-65 parts of polyvinyl chloride, 15-20 parts of polypropylene, 60-65 parts of wood powder, calcite powder 13-15 parts, 10-12 parts of talcum powder, 10-12 parts of diatomaceous earth, 3-5 parts of polyethylene wax, 1-2 parts of Beitou stone powder, 0.1-0.5 parts of titanium dioxide, 2-3 parts of pine needle powder, 1.5-2 parts of naringenin, 1-1.5 parts of lemongrass, 2-2.5 parts of apple eucalyptus leaves, 0.5-1 parts of lemon eucalyptus leaves, 2-3 parts of naked flower purple pearl, 1.5-2 parts of holly leaves, coupling agent 0.3-0.5 parts, 4-6 parts of stabilizer, 2.5-4.5 parts of compatibilizer, 0.5-1 part of ultraviolet absorber;

Preferably, in parts by weight, the following raw material components are included: 62 parts of polyvinyl chloride, 18 parts of polypropylene, 63 parts of wood flour, 14 parts of calcite powder, 11 parts of talcum powder, 11 parts of diatomaceous earth, 4 parts of polyethylene wax 1.5 parts of hokutou stone powder, 0.3 parts of titanium dioxide, 2.5 parts of pine needle powder, 1.7 parts of naringenin, 1.3 parts of lemongrass, 2.2 parts of apple eucalyptus leaves, 0.7 parts of lemon eucalyptus leaves, 2.5 parts of naked flower purple pearls, holly leaves 1.8 parts, 0.4 parts of coupling agent, 5 parts of stabilizer, 3.5 parts of compatibilizer, 0.7 parts of ultraviolet absorber;

In this example, polypropylene and polyvinyl chloride are used as the basic plastic, with an appropriate amount of wood flour and other functional components, and through the use of suitable compatibilizers, coupling agents, etc., and through a specific preparation process, each raw material can be made In order to achieve a better integration, so as to give full play to the synergistic effect between the various raw material components, to achieve a synergistic effect, to prepare a wood-plastic composite board with a natural fragrance, and the prepared wood-plastic composite board is not only It has excellent mechanical properties, and also has excellent antibacterial, sterilizing and antifungal properties, which can inhibit the growth of mold and bacteria, resist the erosion of foreign microorganisms, and can release active ingredients with bactericidal function, which can kill bacteria and viruses in the air. Killing effect, and then play a role in preventing the occurrence and spread of diseases. At the same time, the wood-plastic composite board of this embodiment can also release active ingredients with calming and calming functions, and can also absorb and remove formaldehyde to reduce the release of formaldehyde. Using the wood-plastic composite board of this embodiment for interior decoration can build A more suitable environment for work and life. Among them, diatomaceous earth has excellent adsorption function due to its special porous structure, and can absorb and remove formaldehyde; Odor function, pine needle powder, naringenin, lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves can release active ingredients with antibacterial and anti-mold effects, and these ingredients are formulated in specific amounts Finally, it can greatly increase the killing effect on bacteria and molds, effectively inhibit the growth of molds and bacteria, and resist the erosion of foreign microorganisms; pine needle powder and naringenin can also release active ingredients with calming and calming effects, which are similar to northern Under the synergistic effect of the negative ions released by the stone powder, it can better play the role of calming the nerves, eliminating fatigue and burnout; lemongrass, apple eucalyptus, lemon eucalyptus and nude flower purple pearl also have natural fragrance, which can refresh the body. The effect of air can also repel mosquitoes; diatomaceous earth can also cooperate with talcum powder and calcite powder as the filling material of basic plastics to improve the comprehensive mechanical properties of wood-plastic panels; talcum powder can also cooperate with polyethylene wax and zinc stearate , calcium stearate, etc., to improve processability and facilitate better processing of materials; and the addition of compatibilizers and coupling agents can effectively improve the compatibility between polyvinyl chloride and polypropylene, the plastic matrix and wood Compatibility, dispersibility, etc. between powder and other functional components; while stabilizers and UV absorbers can improve the thermal stability and light stability of the matrix plastic, and so on.

The wood-plastic composite board prepared in this example is an interior decoration material with excellent comprehensive performance in functionality, practicability and decoration. It has multiple functions, and the raw materials used are cheap, non-toxic and harmless, and are very suitable for interior decoration. , has broad market prospects.

In this embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; compounding zinc stearate and calcium stearate can not only improve the stability of the matrix plastic Thermal stability can also cooperate with talcum powder and polyethylene wax to exert a lubricating effect, which helps the material to be processed better.

In this embodiment, the compatibilizer is made by mixing ethylene acrylic acid and maleic anhydride-grafted polypropylene at a mass ratio of 3:1; it helps to better integrate polyvinyl chloride and polypropylene.

In this embodiment, the coupling agent is a mixture of one or more of silane coupling agent, titanate coupling agent, and aluminate coupling agent; Better fusion between functional ingredients.

In this embodiment, the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, hokutolite powder, titanium dioxide, and pine needle powder are all 1000-1200 mesh; it is easy to disperse.

In the present embodiment, the ultraviolet absorber is a mixture of one or more of ultraviolet absorber UV-P, ultraviolet absorber UV-531, and ultraviolet absorber UV-327; Photostability.

This embodiment also provides a method for preparing the wood-plastic composite board with bactericidal effect, comprising the following steps:

a. Take dried lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves, mix and grind them, soak them in an appropriate amount of 85% alcohol for 1-2 hours, then add wood powder, calcite powder, talcum powder, Diatomaceous earth, pine needle powder and naringenin, after stirring for 0.5h, place at 100°C for drying treatment, collect the dried solids, and grind them into powders with a particle size of more than 1000 mesh; the appropriate amount here refers to the ability to soak all Just powder;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, pre-mix for 8-10 minutes at 70-80°C, and then add polyvinyl chloride, polypropylene, polyethylene Wax, compatibilizer, stabilizer and ultraviolet absorber, and heated to 115-120 ° C, mixed for 10-15 minutes, and then cooled to 50-60 ° C to obtain a mixture;

c. Put the mixture obtained in step b into a twin-screw extruder, melt-extrude and granulate at a granulation temperature of 140-180° C. and a screw speed of 155-160 rpm to obtain wood-plastic pellets;

d. Place the wood-plastic pellets prepared in step c in a hot press, and perform hot pressing at a temperature of 190-200°C and a pressure of 8-10 MPa for 15-18 minutes, and then The wood-plastic composite board with bactericidal effect can be obtained by cooling and shaping in a cold press.

The following are specific examples:

Embodiment one

This embodiment provides a wood-plastic composite board with a bactericidal effect, comprising the following raw material components in parts by weight: 65 parts of polyvinyl chloride, 20 parts of polypropylene, 65 parts of wood powder, 15 parts of calcite powder, and 12 parts of talcum powder 12 parts of diatomaceous earth, 5 parts of polyethylene wax, 2 parts of hokutou stone powder, 0.5 parts of titanium dioxide, 3 parts of pine needle powder, 2 parts of naringenin, 1.5 parts of lemongrass, 2.5 parts of apple eucalyptus, 2.5 parts of lemon eucalyptus 1 part, 3 parts of naked flower purple pearl, 2 parts of holly leaves, 0.5 parts of coupling agent, 6 parts of stabilizer, 4.5 parts of compatibilizer, and 1 part of ultraviolet absorber.

In the present embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the compatibilizer is made of ethylene acrylic acid and maleic anhydride grafted polypropylene in a mass ratio of 3:1 mixing; the coupling agent is a mixture of silane coupling agent A-151 and titanate coupling agent PN-133; the ultraviolet absorber is ultraviolet absorber UV-531.

In this embodiment, the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, hokutolite powder, titanium dioxide, and pine needle powder is 1000-1200 mesh.

The method for preparing the wood-plastic composite board with bactericidal effect in this embodiment includes the following steps:

a. Take dried lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves, mix and grind them, soak them in an appropriate amount of 85% alcohol for 2 hours, then add wood powder, calcite powder, talcum powder, and diatoms Soil, pine needle powder and naringenin, after stirring for 0.5h, place at 100°C for drying treatment, collect the dried solids, and crush them into powders with a particle size of more than 1000 mesh; the appropriate amount here refers to the ability to soak all the powders. Can;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, and pre-mix for 8 minutes at 80°C, then add polyvinyl chloride, polypropylene, polyethylene wax, and compatibilize agent, stabilizer and ultraviolet absorber, and heated to 115 ° C, mixed for 15 minutes, and then cooled to 50 ° C to obtain a mixture;

c. Put the mixture obtained in step b into a twin-screw extruder, melt extrude and granulate at a granulation temperature of 180° C. and a screw speed of 155 rpm to obtain wood-plastic pellets;

d. Place the wood-plastic pellets prepared in step c in a hot press, and hot press at a temperature of 200°C and a pressure of 8 MPa. The hot pressing time is 15 minutes, and then press in a cold press. After cooling and shaping, a wood-plastic composite board with a thickness of about 15mm and a natural fragrance with a bactericidal effect can be obtained.

Embodiment two

This embodiment provides a wood-plastic composite board with a bactericidal effect, comprising the following raw material components in parts by weight: 62 parts of polyvinyl chloride, 18 parts of polypropylene, 63 parts of wood powder, 14 parts of calcite powder, and 11 parts of talc powder 11 parts of diatomaceous earth, 4 parts of polyethylene wax, 1.5 parts of Hokutou stone powder, 0.3 parts of titanium dioxide, 2.5 parts of pine needle powder, 1.7 parts of naringenin, 1.3 parts of lemongrass, 2.2 parts of apple eucalyptus, 2.2 parts of lemon eucalyptus 0.7 parts, 2.5 parts of naked flower purple pearl, 1.8 parts of holly leaves, 0.4 parts of coupling agent, 5 parts of stabilizer, 3.5 parts of compatibilizer, and 0.7 parts of ultraviolet absorber.

In the present embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the compatibilizer is made of ethylene acrylic acid and maleic anhydride grafted polypropylene in a mass ratio of 3:1 mixing; the coupling agent is aluminate coupling agent JTW-181; the ultraviolet absorber is a mixture of ultraviolet absorber UV-P and ultraviolet absorber UV-531.

In this embodiment, the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, hokutolite powder, titanium dioxide, and pine needle powder is 1000-1200 mesh.

The method for preparing the wood-plastic composite board with bactericidal effect in this embodiment includes the following steps:

a. Take dried lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves, mix and grind them, soak them in an appropriate amount of 85% alcohol for 2 hours, then add wood powder, calcite powder, talcum powder, and diatoms Soil, pine needle powder and naringenin, after stirring for 0.5h, place at 100°C for drying treatment, collect the dried solids, and crush them into powders with a particle size of more than 1000 mesh; the appropriate amount here refers to the ability to soak all the powders. Can;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, and pre-mix for 10 minutes at 70°C, then add polyvinyl chloride, polypropylene, polyethylene wax, compatibilizer agent, stabilizer and ultraviolet absorber, and heated up to 120 ° C, mixed for 10 minutes, and then cooled to 60 ° C to obtain a mixture;

c. Put the mixture obtained in step b into a twin-screw extruder, melt-extrude and granulate at a granulation temperature of 160° C. and a screw speed of 160 rpm to obtain wood-plastic pellets;

d. Put the wood-plastic pellets prepared in step c in a hot press, and perform hot pressing at a temperature of 190°C and a pressure of 10 MPa. The hot pressing time is 18 minutes, and then press in a cold press. After cooling and shaping, a wood-plastic composite board with a thickness of about 15mm and a natural fragrance with a bactericidal effect can be obtained.

Embodiment Three

This embodiment provides a wood-plastic composite board with a bactericidal effect, comprising the following raw material components in parts by weight: 65 parts of polyvinyl chloride, 15 parts of polypropylene, 65 parts of wood powder, 13 parts of calcite powder, and 12 parts of talcum powder 10 parts of diatomaceous earth, 5 parts of polyethylene wax, 1 part of Hokutou stone powder, 0.5 parts of titanium dioxide, 2 parts of pine needle powder, 2 parts of naringenin, 1 part of lemongrass, 2.5 parts of apple eucalyptus, 2.5 parts of lemon eucalyptus 0.5 parts, 3 parts of naked flower purple pearl, 1.5 parts of holly leaves, 0.5 parts of coupling agent, 4 parts of stabilizer, 4.5 parts of compatibilizer, and 0.5 parts of ultraviolet absorber.

In the present embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the compatibilizer is made of ethylene acrylic acid and maleic anhydride grafted polypropylene in a mass ratio of 3:1 mixing; the coupling agent is a mixture of titanate coupling agent PN-133 and aluminate coupling agent JTW-181; the ultraviolet absorber is ultraviolet absorber UV-531 and ultraviolet A mixture of absorbent UV-327.

In this embodiment, the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, hokutolite powder, titanium dioxide, and pine needle powder is 1000-1200 mesh.

The method for preparing the wood-plastic composite board with bactericidal effect in this embodiment includes the following steps:

a. Take dried lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves, mix and grind them, soak them in an appropriate amount of 85% alcohol for 2 hours, then add wood powder, calcite powder, talcum powder, and diatoms Soil, pine needle powder and naringenin, after stirring for 0.5h, place at 100°C for drying treatment, collect the dried solids, and crush them into powders with a particle size of more than 1000 mesh; the appropriate amount here refers to the ability to soak all the powders. Can;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, and pre-mix for 8 minutes at 80°C, then add polyvinyl chloride, polypropylene, polyethylene wax, and compatibilize agent, stabilizer and ultraviolet absorber, and heated up to 120 ° C, mixed for 10 minutes, and then cooled to 60 ° C to obtain a mixture;

c. Put the mixture obtained in step b into a twin-screw extruder, melt-extrude and granulate at a granulation temperature of 160° C. and a screw speed of 155 rpm to obtain wood-plastic pellets;

d. Put the wood-plastic pellets prepared in step c in a hot press, and perform hot pressing at a temperature of 190°C and a pressure of 10 MPa. The hot pressing time is 18 minutes, and then press in a cold press. After cooling and shaping, a wood-plastic composite board with a thickness of about 15mm and a natural fragrance with a bactericidal effect can be obtained.

Embodiment Four

This embodiment provides a wood-plastic composite board with a bactericidal effect, comprising the following raw material components in parts by weight: 60 parts of polyvinyl chloride, 15 parts of polypropylene, 60 parts of wood powder, 13 parts of calcite powder, and 10 parts of talcum powder 10 parts of diatomaceous earth, 3 parts of polyethylene wax, 1 part of hokutou stone powder, 0.1 part of titanium dioxide, 2 parts of pine needle powder, 1.5 parts of naringenin, 1 part of lemongrass, 2 parts of apple eucalyptus, 2 parts of lemon eucalyptus 0.5 parts, 2 parts of naked flower purple pearl, 1.5 parts of holly leaves, 0.3 parts of coupling agent, 4 parts of stabilizer, 2.5 parts of compatibilizer, and 0.5 parts of ultraviolet absorber.

In the present embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the compatibilizer is made of ethylene acrylic acid and maleic anhydride grafted polypropylene in a mass ratio of 3:1 mixing; the coupling agent is aluminate coupling agent JTW-181; the ultraviolet absorber is ultraviolet absorber UV-531.

In this embodiment, the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, hokutolite powder, titanium dioxide, and pine needle powder is 1000-1200 mesh.

The method for preparing the wood-plastic composite board with bactericidal effect in this embodiment includes the following steps:

a. Take dried lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves, mix and grind them, soak them in an appropriate amount of 85% alcohol for 1 hour, then add wood powder, calcite powder, talc powder, and diatoms Soil, pine needle powder and naringenin, after stirring for 0.5h, place at 100°C for drying treatment, collect the dried solids, and crush them into powders with a particle size of more than 1000 mesh; the appropriate amount here refers to the ability to soak all the powders. Can;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, and pre-mix for 10 minutes at 70°C, then add polyvinyl chloride, polypropylene, polyethylene wax, compatibilizer agent, stabilizer and ultraviolet absorber, and heated to 115 ° C, mixed for 15 minutes, and then cooled to 50 ° C to obtain a mixture;

c. Put the mixture obtained in step b into a twin-screw extruder, melt-extrude and granulate under the conditions of a granulation temperature of 140° C. and a screw speed of 160 rpm to obtain wood-plastic pellets;

d. Put the wood-plastic pellets prepared in step c in a hot press, and perform hot pressing at a temperature of 200°C and a pressure of 8 MPa. The hot pressing time is 18 minutes, and then press in a cold press. After cooling and shaping, a wood-plastic composite board with a thickness of about 15mm and a natural fragrance with a bactericidal effect can be obtained.

Embodiment five

This embodiment provides a wood-plastic composite board with a bactericidal effect, comprising the following raw material components in parts by weight: 60 parts of polyvinyl chloride, 20 parts of polypropylene, 60 parts of wood powder, 15 parts of calcite powder, and 10 parts of talcum powder 12 parts of diatomaceous earth, 3 parts of polyethylene wax, 2 parts of hokutou stone powder, 0.1 part of titanium dioxide, 3 parts of pine needle powder, 1.5 parts of naringenin, 1.5 parts of lemongrass, 2 parts of apple eucalyptus leaves, lemon eucalyptus leaves 1 part, 2 parts of naked flower purple pearl, 2 parts of holly leaves, 0.3 parts of coupling agent, 6 parts of stabilizer, 2.5 parts of compatibilizer, and 1 part of ultraviolet absorber.

In the present embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the compatibilizer is made of ethylene acrylic acid and maleic anhydride grafted polypropylene in a mass ratio of 3:1 mixing; the coupling agent is aluminate coupling agent JTW-181; the ultraviolet absorber is ultraviolet absorber UV-531.

In this embodiment, the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, hokutolite powder, titanium dioxide, and pine needle powder is 1000-1200 mesh.

The method for preparing the wood-plastic composite board with bactericidal effect in this embodiment includes the following steps:

a. Take dried lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves, mix and grind them, soak them in an appropriate amount of 85% alcohol for 2 hours, then add wood powder, calcite powder, talcum powder, and diatoms Soil, pine needle powder and naringenin, after stirring for 0.5h, place at 100°C for drying treatment, collect the dried solids, and crush them into powders with a particle size of more than 1000 mesh; the appropriate amount here refers to the ability to soak all the powders. Can;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, and pre-mix for 8 minutes at 80°C, then add polyvinyl chloride, polypropylene, polyethylene wax, and compatibilize agent, stabilizer and ultraviolet absorber, and heated up to 120 ° C, mixed for 10 minutes, and then cooled to 60 ° C to obtain a mixture;

c. Put the mixture obtained in step b into a twin-screw extruder, melt-extrude and granulate at a granulation temperature of 160° C. and a screw speed of 155 rpm to obtain wood-plastic pellets;

d. Place the wood-plastic pellets prepared in step c in a hot press, and hot press at a temperature of 200°C and a pressure of 8 MPa. The hot pressing time is 15 minutes, and then press in a cold press. After cooling and shaping, a wood-plastic composite board with a thickness of about 15mm and a natural fragrance with a bactericidal effect can be obtained.

All raw material components in the above examples can be purchased from the market.

1. Carry out conventional performance tests on the wood-plastic composite panels prepared in the above-mentioned examples 1 to 5 by conventional test methods, and the results are shown in Table 1:

Table 1

2. Antibacterial performance test: With reference to the QB/T2591-2003 (antibacterial performance test method of antibacterial plastics) standard, measure the antibacterial performance and antifungal performance of the wood-plastic composite boards made in each embodiment (select Staphylococcus aureus, Escherichia coli , Aspergillus niger for the test), the results are shown in Table 2.

Table 2

It can be seen from Table 1 and Table 2 that the wood-plastic composite board prepared in the above examples has excellent mechanical properties and excellent antibacterial and antifungal properties, and can inhibit the growth of mold and bacteria and resist the erosion of foreign microorganisms.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (8)

1. A wood-plastic composite board with a bactericidal effect, characterized in that: by weight, it comprises the following raw material components: 60-65 parts of polyvinyl chloride, 15-20 parts of polypropylene, 60-65 parts of wood powder, 13-15 parts of calcite powder, 10-12 parts of talc powder, 10-12 parts of diatomaceous earth, 3-5 parts of polyethylene wax, 1-2 parts of hokutou stone powder, 0.1-0.5 parts of titanium dioxide, 2-3 parts of pine needle powder 1.5-2 parts of naringenin, 1-1.5 parts of lemongrass, 2-2.5 parts of apple eucalyptus leaves, 0.5-1 parts of lemon eucalyptus leaves, 2-3 parts of naked flower purple pearls, 1.5-2 parts of holly leaves, even 0.3-0.5 parts of joint agent, 4-6 parts of stabilizer, 2.5-4.5 parts of compatibilizer, and 0.5-1 part of ultraviolet absorber. 2. The wood-plastic composite board with bactericidal effect according to claim 1, characterized in that: by weight, it comprises the following raw material components: 62 parts of polyvinyl chloride, 18 parts of polypropylene, 63 parts of wood powder, calcite 14 parts of powder, 11 parts of talcum powder, 11 parts of diatomaceous earth, 4 parts of polyethylene wax, 1.5 parts of Hokutou stone powder, 0.3 parts of titanium dioxide, 2.5 parts of pine needle powder, 1.7 parts of naringenin, 1.3 parts of lemongrass, and eucalyptus 2.2 parts of leaves, 0.7 parts of lemon eucalyptus leaves, 2.5 parts of nudibranchs, 1.8 parts of holly leaves, 0.4 parts of coupling agent, 5 parts of stabilizer, 3.5 parts of compatibilizer, and 0.7 parts of ultraviolet absorber. 3. The wood-plastic composite board with bactericidal effect according to claim 1, characterized in that: the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3. 4. The wood-plastic composite board with bactericidal effect according to claim 1, characterized in that: the compatibilizer is made by mixing ethylene acrylic acid and maleic anhydride grafted polypropylene at a mass ratio of 3:1. 5. The wood-plastic composite board with bactericidal effect according to claim 1, characterized in that: the coupling agent is one of a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent or a mixture of several components. 6. The wood-plastic composite board with bactericidal effect according to claim 1, characterized in that: the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, hokutolite powder, titanium dioxide, and pine needle powder is 1000-1200 mesh. 7. The wood-plastic composite board with bactericidal effect according to claim 1, characterized in that: the ultraviolet absorber is UV absorber UV-P, ultraviolet absorber UV-531, ultraviolet absorber UV-327 One or a mixture of several components. 8. A method for preparing the wood-plastic composite board with bactericidal effect according to any one of claims 1-7, characterized in that: comprising the steps of: a. Take dried lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves, nudibranchs and holly leaves, mix and grind them, soak them in an appropriate amount of 85% alcohol for 1-2 hours, then add wood powder, calcite powder, talcum powder, Diatomaceous earth, pine needle powder and naringenin were stirred for 0.5h, then dried at 100°C, and the dried solids were collected and crushed into powders with a particle size of more than 1000 mesh; b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, pre-mix for 8-10 minutes at 70-80°C, and then add polyvinyl chloride, polypropylene, polyethylene Wax, compatibilizer, stabilizer and ultraviolet absorber, and heated to 115-120 ° C, mixed for 10-15 minutes, and then cooled to 50-60 ° C to obtain a mixture; c. Put the mixture obtained in step b into a twin-screw extruder, melt-extrude and granulate at a granulation temperature of 140-180° C. and a screw speed of 155-160 rpm to obtain wood-plastic pellets; d. Place the wood-plastic pellets prepared in step c in a hot press, and perform hot pressing at a temperature of 190-200°C and a pressure of 8-10 MPa for 15-18 minutes, and then The wood-plastic composite board with bactericidal effect can be obtained by cooling and shaping in a cold press.