CN108641230A - Ageing-resistant antibiosis wood plastic composite plate and preparation method thereof - Google Patents

Abstract

The invention provides an aging-resistant and antibacterial wood-plastic composite board, which comprises the following raw material components in parts by weight: 80-90 parts of polyvinyl chloride, 60-65 parts of wood powder, 15-18 parts of ramie fiber, and 15-15 parts of calcite powder 17 parts, 8‑10 parts of talcum powder, 5‑8 parts of diatomaceous earth, 5‑8 parts of shell powder, 1‑2 parts of hokutou stone powder, 0.1‑0.5 parts of titanium dioxide, 2‑3 parts of pine needle powder, naringenin 1.5‑2 parts, lemongrass 1‑1.5 parts, apple eucalyptus leaves 2‑2.5 parts, lemon eucalyptus leaves 0.5‑1 parts, naked flower purple pearl 2‑3 parts, holly leaves 1.5‑2 parts, coupling agent 0.3‑0.5 parts 1 part, 4-6 parts of stabilizer, 2-3 parts of oxidized polyethylene wax, 1.5-3 parts of antioxidant, 0.5-1 part of ultraviolet absorber. The wood-plastic composite board of the invention has excellent mechanical properties, anti-aging properties and antibacterial and anti-mildew properties, and is an interior decoration material with excellent comprehensive properties.

Description

Anti-aging antibacterial wood-plastic composite board and preparation method thereof

technical field

The invention relates to the field of composite materials, in particular to an aging-resistant and antibacterial wood-plastic composite board 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. At the same time, the plastic matrix is also easily affected by the environment, and there is a problem that it is prone to aging.

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, improve the aging resistance of wood-plastic composites, and be able to exert other beneficial functions, it is necessary to develop a composite material with excellent anti-corrosion and anti-bacterial functions and anti-aging properties. Multi-functional wood-plastic composite materials in order to broaden the application fields of wood-plastic composite materials.

Contents of the invention

In view of this, the present invention provides an aging-resistant and antibacterial wood-plastic composite board with excellent performance. The wood-plastic composite board has a natural fragrance and can repel mosquitoes. It can not only 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 aging-resistant and antibacterial wood-plastic composite board provided by the present invention comprises the following raw material components in parts by weight: 80-90 parts of polyvinyl chloride, 60-65 parts of wood powder, 15-18 parts of ramie fiber, and 15-17 parts of calcite powder 8-10 parts of talcum powder, 5-8 parts of diatomaceous earth, 5-8 parts of shell powder, 1-2 parts of hokutou stone powder, 0.1-0.5 parts of titanium dioxide, 2-3 parts of pine needle powder, 1.5 parts of naringenin -2 parts, 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, 0.3-0.5 parts of coupling agent , 4-6 parts of stabilizer, 2-3 parts of oxidized polyethylene wax, 1.5-3 parts of antioxidant, 0.5-1 part of ultraviolet absorber;

Further, in parts by weight, the following raw material components are included: 85 parts of polyvinyl chloride, 63 parts of wood flour, 16 parts of ramie fiber, 16 parts of calcite powder, 9 parts of talcum powder, 6 parts of diatomaceous earth, 7 parts of shell powder, 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 , 0.4 parts of coupling agent, 5 parts of stabilizer, 2.5 parts of oxidized polyethylene wax, 2 parts of antioxidant, 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 coupling agent is one or a mixture of titanate coupling agent and aluminate coupling agent;

Further, the antioxidant is made by mixing antioxidant 1076, antioxidant 168, and antioxidant DLTDP in a mass ratio of 1.5:1:0.5;

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

Furthermore, the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, shell powder, hokutou stone powder, titanium dioxide powder, and pine needle powder is 1000-1200 mesh.

The invention also discloses a method for preparing the aging-resistant and antibacterial wood-plastic composite board, which 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 1-2 hours, then add wood powder, ramie fiber, calcite powder, Talc powder, diatomaceous earth, shell powder, 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;

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, stabilizer, oxidized poly Ethylene wax, antioxidant 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 aging-resistant and antibacterial wood-plastic composite board can be obtained by cooling and shaping in a cold press.

Beneficial effects of the present invention:

The present invention uses polyvinyl chloride as the basic plastic, matches appropriate amount of wood flour and other functional components, and uses suitable auxiliary agents such as coupling agent, and then undergoes a specific preparation process to achieve better fusion of various raw material components. , 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 not only has excellent mechanical properties and Aging resistance, also has excellent antibacterial, sterilizing and antifungal 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 , 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, diatomite and shell powder have excellent adsorption function due to their special porous structure, and can absorb and decompose to remove formaldehyde. Ramie fiber has a special ultra-fine microporous structure inside, which has strong adsorption capacity and can absorb harmful substances such as formaldehyde. Substances can also eliminate bad odors. After their synergy, they can improve the ability to absorb and remove formaldehyde, greatly reduce the amount of formaldehyde released, and can also absorb and remove harmful substances in the air; talcum powder has excellent antibacterial effect, ramie fiber, shells Powder also has excellent antibacterial and antiseptic effects. Beitou stone powder can release negative ions and kill germs. Titanium dioxide has excellent sterilization and deodorization functions. Pine needle powder, naringenin, lemongrass, apple eucalyptus, lemon eucalyptus, naked Flower purple pearls and holly leaves can release active ingredients with antibacterial and anti-mold effects. After these components are mixed in a specific amount, they can greatly increase the killing effect on bacteria and mold, and can effectively inhibit mold and bacteria. Growth and resistance to the erosion of foreign microorganisms; pine needle powder and naringenin can also release active ingredients with calming and calming effects, and under the synergy with the negative ions released by Beitou stone powder, they can better calm the nerves, eliminate fatigue and burnout Lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves and naked flower purple pearls also have natural fragrance, which can freshen the air and repel mosquitoes; diatomaceous earth, shell powder, talcum powder, and calcite powder can also It can be used as a filler material for basic plastics to improve the comprehensive mechanical properties of wood-plastic panels; talc powder can also be used to synergistically oxidize polyethylene wax, zinc stearate, calcium stearate, etc., to improve processability and facilitate better processing of materials Forming; and the addition of coupling agent can effectively improve the compatibility and dispersion between polyvinyl chloride and wood flour and other functional components; while stabilizers, antioxidants and ultraviolet absorbers can improve the Stability and oxidation resistance, thus greatly improving the aging resistance of wood-plastic materials, 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 an aging-resistant and antibacterial wood-plastic composite board, which includes the following raw material components in parts by weight: 80-90 parts of polyvinyl chloride, 60-65 parts of wood powder, 15-18 parts of ramie fiber, and 15 parts of calcite powder. -17 parts, 8-10 parts of talcum powder, 5-8 parts of diatomaceous earth, 5-8 parts of shell powder, 1-2 parts of hokutou 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, 2-3 parts of oxidized polyethylene wax, 1.5-3 parts of antioxidant, 0.5-1 part of ultraviolet absorber;

Preferably, in parts by weight, the following raw material components are included: 85 parts of polyvinyl chloride, 63 parts of wood flour, 16 parts of ramie fiber, 16 parts of calcite powder, 9 parts of talcum powder, 6 parts of diatomaceous earth, and 7 parts of shell powder , 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, 2.5 parts of oxidized polyethylene wax, 2 parts of antioxidant, 0.7 part of ultraviolet absorber;

In this example, polyvinyl chloride is used as the basic plastic, matched with an appropriate amount of wood powder and other functional components, and by using a suitable auxiliary agent such as a coupling agent, and then through a specific preparation process, each raw material component can achieve better Fusion, 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 It also has excellent antibacterial, sterilizing and antifungal 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 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, diatomite and shell powder have excellent adsorption function due to their special porous structure, and can absorb and decompose to remove formaldehyde. Ramie fiber has a special ultra-fine microporous structure inside, which has strong adsorption capacity and can absorb harmful substances such as formaldehyde. Substances can also eliminate bad odors. After their synergy, they can improve the ability to absorb and remove formaldehyde, greatly reduce the amount of formaldehyde released, and can also absorb and remove harmful substances in the air; talcum powder has excellent antibacterial effect, ramie fiber, shells Powder also has excellent antibacterial and antiseptic effects. Beitou stone powder can release negative ions and kill germs. Titanium dioxide has excellent sterilization and deodorization functions. Pine needle powder, naringenin, lemongrass, apple eucalyptus, lemon eucalyptus, naked Flower purple pearls and holly leaves can release active ingredients with antibacterial and anti-mold effects. After these components are mixed in a specific amount, they can greatly increase the killing effect on bacteria and mold, and can effectively inhibit mold and bacteria. Growth and resistance to the erosion of foreign microorganisms; pine needle powder and naringenin can also release active ingredients with calming and calming effects, and under the synergy with the negative ions released by Beitou stone powder, they can better calm the nerves, eliminate fatigue and burnout Lemongrass, apple eucalyptus leaves, lemon eucalyptus leaves and naked flower purple pearls also have natural fragrance, which can freshen the air and repel mosquitoes; diatomaceous earth, shell powder, talcum powder, and calcite powder can also It can be used as a filler material for basic plastics to improve the comprehensive mechanical properties of wood-plastic panels; talc powder can also be used to synergistically oxidize polyethylene wax, zinc stearate, calcium stearate, etc., to improve processability and facilitate better processing of materials Forming; and the addition of coupling agent can effectively improve the compatibility and dispersion between polyvinyl chloride and wood flour and other functional components; while stabilizers, antioxidants and ultraviolet absorbers can improve the Stability and oxidation resistance, thus greatly improving the aging resistance of wood-plastic materials, 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, and the compounded stabilizer has better effect.

In this embodiment, the coupling agent is one or a mixture of titanate coupling agent and aluminate coupling agent.

In this embodiment, the antioxidant is made by mixing antioxidant 1076, antioxidant 168, and antioxidant DLTDP at a mass ratio of 1.5:1:0.5, and the compounded antioxidant is more suitable for use in Improve the oxidation resistance of the plastic matrix and improve its aging resistance.

In this embodiment, the ultraviolet absorber is one or a mixture of ultraviolet absorber UV-P, ultraviolet absorber UV-531 and ultraviolet absorber UV-327.

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

This embodiment also discloses a method for preparing the aging-resistant and antibacterial wood-plastic composite board, which 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 1-2 hours, then add wood powder, ramie fiber, calcite powder, Talc powder, diatomaceous earth, shell powder, pine needle powder and naringenin, after stirring for 0.5h, place at 100°C for drying treatment, collect the dried solid, and crush it into a powder with a particle size of more than 1000 mesh; here The appropriate amount means that all the powder can be soaked;

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, stabilizer, oxidized poly Ethylene wax, antioxidant 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 aging-resistant and antibacterial wood-plastic composite board can be obtained by cooling and shaping in a cold press.

The following are specific examples:

Embodiment one

This embodiment provides an anti-aging and antibacterial wood-plastic composite board, which includes the following raw material components in parts by weight: 90 parts of polyvinyl chloride, 65 parts of wood flour, 18 parts of ramie fiber, 17 parts of calcite powder, and 10 parts of talc powder , 8 parts of diatomaceous earth, 8 parts of shell powder, 2 parts of hokuto 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, 1 part of lemon eucalyptus , 3 parts of naked flower purple pearl, 2 parts of holly leaves, 0.5 parts of coupling agent, 6 parts of stabilizer, 3 parts of oxidized polyethylene wax, 3 parts of antioxidant, 1 part of ultraviolet absorber.

In this example, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the coupling agent is titanate coupling agent PN-130 and aluminate coupling agent A mixture of joint agent JTW-181; the antioxidant is made by mixing antioxidant 1076, antioxidant 168, and antioxidant DLTDP in a mass ratio of 1.5:1:0.5; the ultraviolet absorber is ultraviolet absorbing agent UV-531.

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

The method for preparing the aging-resistant and antibacterial wood-plastic composite board 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, ramie fiber, calcite powder, and talcum powder , diatomaceous earth, shell powder, pine needle powder and naringenin, after stirring for 0.5h, place it at 100°C for drying treatment, collect the dried solid, and grind it into a powder with a particle size of more than 1000 mesh; It means that all the powder can be soaked;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, pre-mix for 8 minutes at 80°C, and then add polyvinyl chloride, stabilizer, oxidized polyethylene wax, anti Oxygen agent and ultraviolet absorber, and heated up 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, the aging-resistant and antibacterial wood-plastic composite board with a thickness of about 15mm and natural fragrance can be obtained.

Embodiment two

This embodiment provides an anti-aging and antibacterial wood-plastic composite board, which includes the following raw material components in parts by weight: 85 parts of polyvinyl chloride, 63 parts of wood flour, 16 parts of ramie fiber, 16 parts of calcite powder, and 9 parts of talc powder , 6 parts of diatomaceous earth, 7 parts of shell powder, 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 pearl, 1.8 parts of holly leaves, 0.4 parts of coupling agent, 5 parts of stabilizer, 2.5 parts of oxidized polyethylene wax, 2 parts of antioxidant, 0.7 part of ultraviolet absorber.

In this embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the coupling agent is aluminate coupling agent JTW-181; the antioxidant The agent is made by mixing antioxidant 1076, antioxidant 168, and antioxidant DLTDP in a mass ratio of 1.5:1:0.5; the ultraviolet absorber is ultraviolet absorber UV-P, 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, shell powder, hokutolite powder, titanium dioxide powder, and pine needle powder is 1000-1200 mesh.

The method for preparing the aging-resistant and antibacterial wood-plastic composite board 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, ramie fiber, calcite powder, and talcum powder , diatomaceous earth, shell powder, pine needle powder and naringenin, after stirring for 0.5h, place it at 100°C for drying treatment, collect the dried solid, and grind it into a powder with a particle size of more than 1000 mesh; It means that all the powder can be soaked;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, pre-mix for 10 minutes at 70°C, and then add polyvinyl chloride, stabilizer, oxidized polyethylene wax, anti Oxygen agent 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, the aging-resistant and antibacterial wood-plastic composite board with a thickness of about 15mm and natural fragrance can be obtained.

Embodiment three

This embodiment provides an anti-aging antibacterial wood-plastic composite board, which includes the following raw material components in parts by weight: 90 parts of polyvinyl chloride, 60 parts of wood flour, 18 parts of ramie fiber, 15 parts of calcite powder, and 10 parts of talcum powder , 5 parts of diatomaceous earth, 8 parts of shell powder, 1 part of Hokuto stone powder, 0.5 part of titanium dioxide, 2 parts of pine needle powder, 2 parts of naringenin, 1 part of lemongrass, 2.5 parts of apple eucalyptus, 0.5 part of lemon eucalyptus , 3 parts of naked flower purple pearls, 1.5 parts of holly leaves, 0.5 parts of coupling agent, 4 parts of stabilizer, 3 parts of oxidized polyethylene wax, 1.5 parts of antioxidant, and 1 part of ultraviolet absorber.

In this embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the coupling agent is aluminate coupling agent JTW-181; the antioxidant The antioxidant is made by mixing antioxidant 1076, antioxidant 168, and antioxidant DLTDP in a mass ratio of 1.5:1:0.5; the ultraviolet absorber is ultraviolet absorber UV-531.

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

The method for preparing the aging-resistant and antibacterial wood-plastic composite board 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, ramie fiber, calcite powder, and talcum powder , diatomaceous earth, shell powder, pine needle powder and naringenin, after stirring for 0.5h, place it at 100°C for drying treatment, collect the dried solid, and grind it into a powder with a particle size of more than 1000 mesh; It means that all the powder can be soaked;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, pre-mix for 8 minutes at 80°C, and then add polyvinyl chloride, stabilizer, oxidized polyethylene wax, anti Oxygen agent 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 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, the aging-resistant and antibacterial wood-plastic composite board with a thickness of about 15mm and natural fragrance can be obtained.

Embodiment Four

This embodiment provides an anti-aging and antibacterial wood-plastic composite board, which includes the following raw material components in parts by weight: 80 parts of polyvinyl chloride, 60 parts of wood flour, 15 parts of ramie fiber, 15 parts of calcite powder, and 8 parts of talcum powder , 5 parts of diatomaceous earth, 5 parts of shell powder, 1 part of Hokuto 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, 0.5 part of lemon eucalyptus , 2 parts of naked flower purple pearl, 1.5 parts of holly leaves, 0.3 parts of coupling agent, 4 parts of stabilizer, 2 parts of oxidized polyethylene wax, 1.5 parts of antioxidant, 0.5 part of ultraviolet absorber.

In this embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the coupling agent is titanate coupling agent PN-130; the antioxidant The antioxidant is made by mixing antioxidant 1076, antioxidant 168, and antioxidant DLTDP in a mass ratio of 1.5:1:0.5; the ultraviolet absorber is ultraviolet absorber UV-531.

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

The method for preparing the aging-resistant and antibacterial wood-plastic composite board 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, ramie fiber, calcite powder, and talcum powder , diatomaceous earth, shell powder, pine needle powder and naringenin, after stirring for 0.5h, place it at 100°C for drying treatment, collect the dried solid, and grind it into a powder with a particle size of more than 1000 mesh; It means that all the powder can be soaked;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, pre-mix for 10 minutes at 70°C, and then add polyvinyl chloride, stabilizer, oxidized polyethylene wax, anti Oxygen agent and ultraviolet absorber, and heated up 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. Place 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 10 MPa. The hot pressing time is 18 minutes, and then press in a cold press. After cooling and shaping, the aging-resistant and antibacterial wood-plastic composite board with a thickness of about 15mm and natural fragrance can be obtained.

Embodiment five

This embodiment provides an anti-aging and antibacterial wood-plastic composite board, which includes the following raw material components in parts by weight: 80 parts of polyvinyl chloride, 65 parts of wood flour, 15 parts of ramie fiber, 17 parts of calcite powder, and 8 parts of talc powder , 8 parts of diatomaceous earth, 5 parts of shell powder, 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, 1 part of lemon eucalyptus , 2 parts of naked flower purple pearl, 2 parts of holly leaves, 0.3 parts of coupling agent, 6 parts of stabilizer, 2 parts of oxidized polyethylene wax, 3 parts of antioxidant, 0.5 part of ultraviolet absorber.

In this embodiment, the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3; the coupling agent is aluminate coupling agent JTW-181; the antioxidant The antioxidant is made by mixing antioxidant 1076, antioxidant 168, and antioxidant DLTDP in a mass ratio of 1.5:1:0.5; the ultraviolet absorber is ultraviolet absorber UV-531.

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

The method for preparing the aging-resistant and antibacterial wood-plastic composite board 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, ramie fiber, calcite powder, and talcum powder , diatomaceous earth, shell powder, pine needle powder and naringenin, after stirring for 0.5h, place it at 100°C for drying treatment, collect the dried solid, and grind it into a powder with a particle size of more than 1000 mesh; It means that all the powder can be soaked;

b. Add the powder obtained in step a, hokutolite powder, titanium dioxide and coupling agent into a high-speed mixer, pre-mix for 10 minutes at 70°C, and then add polyvinyl chloride, stabilizer, oxidized polyethylene wax, anti Oxygen agent 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, the aging-resistant and antibacterial wood-plastic composite board with a thickness of about 15mm and natural fragrance 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:

Performance Embodiment one Embodiment two Embodiment three Embodiment Four Embodiment five Bending failure load (N) 3550 3470 3490 3380 3420 Water absorption (%) 1.4 1.3 1.3 1.25 1.35 Formaldehyde emission E level ₀ E level ₀ E level ₀ E level ₀ E level ₀

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. An aging-resistant and antibacterial wood-plastic composite board, characterized in that: by weight, it comprises the following raw material components: 80-90 parts of polyvinyl chloride, 60-65 parts of wood flour, 15-18 parts of ramie fiber, calcite 15-17 parts of powder, 8-10 parts of talcum powder, 5-8 parts of diatomaceous earth, 5-8 parts of shell powder, 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 pearl, 1.5-2 parts of holly leaves, coupling agent 0.3-0.5 parts, 4-6 parts of stabilizer, 2-3 parts of oxidized polyethylene wax, 1.5-3 parts of antioxidant, 0.5-1 part of ultraviolet absorber. 2. The aging-resistant antibacterial wood-plastic composite board according to claim 1, characterized in that: by weight, it comprises the following raw material components: 85 parts of polyvinyl chloride, 63 parts of wood powder, 16 parts of ramie fiber, calcite powder 16 parts, 9 parts of talcum powder, 6 parts of diatomaceous earth, 7 parts of shell powder, 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 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, 2.5 parts of oxidized polyethylene wax, 2 parts of antioxidant, and 0.7 parts of ultraviolet absorber. 3. The aging-resistant and antibacterial wood-plastic composite board according to claim 1, wherein the stabilizer is made by mixing zinc stearate and calcium stearate at a mass ratio of 1:3. 4. The aging-resistant and antibacterial wood-plastic composite board according to claim 1, characterized in that: the coupling agent is one or a mixture of titanate coupling agent and aluminate coupling agent . 5. The aging-resistant and antibacterial wood-plastic composite board according to claim 1, characterized in that: the antioxidant is composed of antioxidant 1076, antioxidant 168, and antioxidant DLTDP in a mass ratio of 1.5:1:0.5 Mix made. 6. The aging-resistant and antibacterial wood-plastic composite board according to claim 1, characterized in that: the ultraviolet absorber is one of ultraviolet absorber UV-P, ultraviolet absorber UV-531, and ultraviolet absorber UV-327 one or a mixture of several. 7. The aging-resistant and antibacterial wood-plastic composite board according to claim 1, characterized in that: the particle size of the wood powder, calcite powder, talcum powder, diatomaceous earth, shell powder, hokutou stone powder, titanium dioxide, and pine needle powder Both are 1000-1200 mesh. 8. A method for preparing the aging-resistant antibacterial wood-plastic composite board 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, ramie fiber, calcite powder, Talc powder, diatomaceous earth, shell powder, 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; 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, stabilizer, oxidized poly Ethylene wax, antioxidant 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 aging-resistant and antibacterial wood-plastic composite board can be obtained by cooling and shaping in a cold press.