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CN112980079A - Wood-plastic antibacterial board and preparation method thereof - Google Patents

Wood-plastic antibacterial board and preparation method thereof Download PDF

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Publication number
CN112980079A
CN112980079A CN202110200910.4A CN202110200910A CN112980079A CN 112980079 A CN112980079 A CN 112980079A CN 202110200910 A CN202110200910 A CN 202110200910A CN 112980079 A CN112980079 A CN 112980079A
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CN
China
Prior art keywords
wood
parts
glue solution
plastic
agent
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Pending
Application number
CN202110200910.4A
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Chinese (zh)
Inventor
高忠麟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Best Cheer Xiamen Stone Works Co ltd
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Best Cheer Xiamen Stone Works Co ltd
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Priority to CN202110200910.4A priority Critical patent/CN112980079A/en
Publication of CN112980079A publication Critical patent/CN112980079A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
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    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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    • C08J9/0028—Use of organic additives containing nitrogen
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    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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    • C08J2461/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2461/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08J2461/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C08J2461/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
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  • Medicinal Chemistry (AREA)
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  • Polymers & Plastics (AREA)
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Abstract

The invention discloses a wood-plastic antibacterial board and a preparation method thereof, wherein the board consists of a base layer and a surface decorative layer; the base layer comprises polyethylene, an elastomer, a toughening agent, carbonized wood flour, a flame-retardant filler, glass fiber, an AC foaming agent, an activating material and a mildew preventive; the raw materials of the surface decoration layer comprise unsaturated resin, a curing agent, a cross-linking agent, melamine formaldehyde resin, a flame retardant, an antibacterial agent and a pigment. The wood-plastic antibacterial board has a simple hierarchical structure, correspondingly simplifies the production process steps, and improves the production efficiency. The wood-plastic antibacterial board is subjected to micro-foaming, so that the density is reduced under the condition of ensuring the strength, the transportation is convenient, and the application range is wide.

Description

Wood-plastic antibacterial board and preparation method thereof
Technical Field
The invention relates to the technical field of building materials, in particular to a wood-plastic antibacterial plate and a preparation method thereof.
Background
The PVC wood-plastic board plays an important role in the field of furniture and floor decoration by virtue of excellent performance, and the application range of the PVC wood-plastic board is wider and wider along with the acceleration of economic construction steps in China. The existing PVC wood-plastic board is usually provided with a decorative layer on the surface in a film pasting mode, and the surface of the decorative layer is usually coated with an abrasion-resistant layer, a paint layer and the like so as to achieve better decorative effect and abrasion-resistant effect. Therefore, the surface decoration steps of the wood-plastic board are more, and the production efficiency is influenced.
On the other hand, the filler of the wood-plastic board is wood powder or sawdust, and when the wood-plastic board is only wetted or used in a humid environment, the wood-plastic board often becomes moldy, and the wood-plastic board needs to be subjected to antibacterial treatment. The existing antibacterial wood-plastic board is difficult to achieve long-acting antibacterial effect.
Disclosure of Invention
The invention aims to provide a wood-plastic antibacterial plate and a preparation method thereof. The wood-plastic antibacterial board is subjected to micro-foaming, so that the density is reduced under the condition of ensuring the strength, the transportation is convenient, and the application range is wide.
In order to achieve the purpose, the invention adopts the following technical scheme:
a wood-plastic antibacterial board consists of a base layer and a surface decorative layer;
the base layer comprises polyethylene, an elastomer, a toughening agent, carbonized wood flour, a flame-retardant filler, glass fiber, an AC foaming agent, an activating material and a mildew preventive; the raw materials of the surface decoration layer comprise unsaturated resin, a curing agent, a cross-linking agent, melamine formaldehyde resin, a flame retardant, an antibacterial agent and a pigment.
Further, the base layer comprises the following raw materials in parts by weight: 100-150 parts of polyethylene, 5-8 parts of elastomer, 10-15 parts of toughening agent, 80-100 parts of carbonized wood powder, 20-30 parts of flame-retardant filler, 10-15 parts of glass fiber, 0.5-1 part of AC foaming agent, 1-1.5 parts of activating material and 0.2-0.5 part of mildew preventive.
Further, the raw materials of the surface decoration layer comprise, by weight: 20-25 parts of unsaturated resin, 2-4 parts of curing agent, 3-5 parts of cross-linking agent, 4-5 parts of melamine formaldehyde resin, 2-3 parts of flame retardant, 1-2 parts of antibacterial agent and 0.1-2 parts of pigment.
Furthermore, the surface decoration layer has a wood grain decoration effect.
A preparation method of a wood-plastic antibacterial board is used for preparing the wood-plastic antibacterial board and comprises the following steps:
(1) after the flame-retardant filler and the glass fiber are uniformly mixed, adding the carbonized wood powder and the mildew preventive and continuously and uniformly mixing to obtain a mixed filler; mixing the mixed filler with polyethylene particles, and mixing to prepare a granular material;
(2) mixing an elastomer, a toughening agent, an AC foaming agent and an activating material to prepare a foaming granule, and then crushing the foaming granule to prepare 800-mesh foaming powder with the particle size of 600-;
(3) feeding foaming powder and foaming granules into an extruder, extruding into a mold and molding to obtain a wood-plastic base material;
(4) uniformly mixing unsaturated resin, a curing agent, a cross-linking agent, melamine formaldehyde resin, a flame retardant, an antibacterial agent and a pigment to obtain a decorative glue solution, and applying the decorative glue solution on the surface of the wood-plastic base material;
(5) and curing the wood-plastic base material with the surface decorative layer at 95-110 ℃ and 0.1-0.2MPa to obtain the finished product of the wood-plastic antibacterial board.
Further, in the step (4), the decorative glue solution is divided into a base color glue solution, a main color glue solution and a color matching glue solution according to the difference of the added pigments;
and (3) preliminarily forming wood textures on the casting inclined plate by the base color glue solution, the main color glue solution and the color matching glue solution, allowing the wood textures to flow down from the casting inclined plate, covering the surface of the wood-plastic base material passing through the lower part of the casting inclined plate at a constant speed, and forming wood grains on the surface of the wood-plastic base material.
Further, when the base color glue solution passes through the casting inclined plate, firstly, the main color glue solution is sprayed on the base color glue solution along the transverse direction of the casting inclined plate, and then, the color matching glue solution is sprayed on the base color glue solution or the main color glue solution;
a plurality of transverse rails are arranged above the casting inclined plate, and a plurality of main color hoppers filled with main color glue liquid are movably arranged on the transverse rails; a plurality of color matching hoppers filled with color matching glue liquid are arranged above the casting inclined plate in a transversely movable or longitudinally movable manner.
Further, the preparation method of the flame-retardant filler comprises the steps of putting 20-24 parts of argil, 5-7 parts of calcined talc, 4-6 parts of potash-soda feldspar and 1.5-2.5 parts of zinc oxide into a ball mill according to the weight ratio, adding water into the ball mill, carrying out ball milling on the mixture to prepare slurry, and carrying out spray granulation on the slurry to obtain powder;
firing the powder at 400-600 ℃ for 50-60min, and then grinding to obtain dry fine powder;
and uniformly mixing the fine powder and 5 parts by weight of surface treating agent, drying and crushing to obtain the flame-retardant filler.
Further, the preparation method of the antibacterial agent comprises the following steps: mixing silver salt and nano zinc powder in isopropanol to obtain a metal mixed solution, mixing the metal mixed solution with polyacrylic acid for 50-60min, and carrying out ultraviolet irradiation at the dose of UVC 12.32kJ/m2 for the last 5-10min of mixing to obtain the antibacterial agent.
Further, in the step (1), the mixing temperature is 95-100 ℃, and the particle size of the prepared granules is 20-100 meshes;
in the step (2), the mixing temperature is 110-115 ℃, and the particle size of the foaming particles is 80-100 meshes;
in the step (3), the extrusion temperature of the extruder is controlled at 210-215 ℃.
The invention has the beneficial effects that:
the wood-plastic antibacterial board only consists of the base layer and the surface decorative layer, the hierarchical structure is simple, the surface decorative layer is distributed on the surface of the base layer at one time, the surface decoration step of the wood-plastic antibacterial board is simplified to a great extent, and the production efficiency is improved.
The surface decorative layer is based on the addition of melamine formaldehyde resin, and has a good wear-resistant effect after being cured, so that the wood-plastic antibacterial board can be applied to the ground or other planes with more friction. The base layer and the surface decoration layer both have antibacterial and flame-retardant effects, so that the wood-plastic antibacterial board has better antibacterial and flame-retardant capabilities.
Detailed Description
The technical solution of the present invention will be further described with reference to the following embodiments.
The invention provides a wood-plastic antibacterial plate which consists of a base layer and a surface decorative layer;
the base layer comprises polyethylene, an elastomer, a toughening agent, carbonized wood flour, a flame-retardant filler, glass fiber, an AC foaming agent, an activating material and a mildew preventive; the raw materials of the surface decoration layer comprise unsaturated resin, a curing agent, a cross-linking agent, melamine formaldehyde resin, a flame retardant, an antibacterial agent and a pigment.
Specifically, the polyethylene consists of High Density Polyethylene (HDPE) and Low Density Polyethylene (LDPE), the mass ratio of the HDPE to the LDPE is 9:1, and the two polyethylenes with different densities are added simultaneously, so that the process difficulty can be reduced, and the heat resistance and the impact resistance of the bottom layer can be improved. The elastomer is SBS elastomer. The toughening agent is a dendritic toughening agent. The activating material is stearate or zinc oxide. The unsaturated resin is m-benzene type unsaturated polyester resin, o-benzene type unsaturated polyester resin or p-benzene type unsaturated polyester resin, and the curing agent is methyl ethyl ketone peroxide and cross-linking agent glutaraldehyde. Preferably, the raw material of the surface decorative layer further comprises promoter cobalt iso-octoate. The resin with low molecular weight, the curing agent and the cross-linking agent are selected to ensure that the resin has better fluidity.
The mildew preventive of the base layer is a compound mildew preventive of salicylanilide and carbendazim. The raw materials of the flame-retardant filler comprise pottery clay, calcined talc, potash feldspar and zinc oxide. The flame retardant is a mixture of melamine cyanurate and microencapsulated red phosphorus, and the mass ratio of the melamine cyanurate to the microencapsulated red phosphorus is 2: 3. the melamine cyanurate is a nitrogen-containing halogen-free environment-friendly flame retardant, and the melamine cyanurate and the red phosphorus both achieve a flame retardant effect under the action of covering, and when the mass ratio of the melamine cyanurate to the microencapsulated red phosphorus is 2:3, the melamine cyanurate and the microencapsulated red phosphorus cooperate to achieve a good flame retardant effect. Wherein, the microencapsulated red phosphorus has better compatibility with organic matters and can be better mixed in the organic matters. Preferably, the melamine cyanurate is a powder with a particle size of 400-600 mesh.
Further, the base layer comprises the following raw materials in parts by weight: 100-150 parts of polyethylene, 5-8 parts of elastomer, 10-15 parts of toughening agent, 80-100 parts of carbonized wood powder, 20-30 parts of flame-retardant filler, 10-15 parts of glass fiber, 0.5-1 part of AC foaming agent, 1-1.5 parts of activating material and 0.2-0.5 part of mildew preventive.
Further, the raw materials of the surface decoration layer comprise, by weight: 20-25 parts of unsaturated resin, 2-4 parts of curing agent, 3-5 parts of cross-linking agent, 4-5 parts of melamine formaldehyde resin, 2-3 parts of flame retardant, 1-2 parts of antibacterial agent and 0.1-2 parts of pigment.
Furthermore, the surface decoration layer has a wood grain decoration effect.
A preparation method of a wood-plastic antibacterial board is used for preparing the wood-plastic antibacterial board and comprises the following steps:
(1) after the flame-retardant filler and the glass fiber are uniformly mixed, adding the carbonized wood powder and the mildew preventive and continuously and uniformly mixing to obtain a mixed filler; mixing the mixed filler with polyethylene particles, and mixing to prepare a granular material;
(2) mixing an elastomer, a toughening agent, an AC foaming agent and an activating material to prepare a foaming granule, and then crushing the foaming granule to prepare 800-mesh foaming powder with the particle size of 600-;
(3) feeding foaming powder and foaming granules into an extruder, extruding into a mold and molding to obtain a wood-plastic base material;
(4) uniformly mixing unsaturated resin, a curing agent, a cross-linking agent, melamine formaldehyde resin, a flame retardant, an antibacterial agent and a pigment to obtain a decorative glue solution, and applying the decorative glue solution on the surface of the wood-plastic base material;
(5) and curing the wood-plastic base material with the surface decorative layer at 95-110 ℃ and 0.1-0.2MPa to obtain the finished product of the wood-plastic antibacterial board.
The raw materials of the base layer are respectively made into two kinds of granular materials, so that the contact between the carbonized wood powder and the foaming material can be reduced to a certain degree, and therefore, tiny holes formed by foaming can be prevented from being in contact with the carbonized wood powder, and the carbonized wood powder is prevented from being damp and expanding due to the contact with the outside air. On the other hand, the foaming material is prepared into foaming powder, so that fine holes formed by foaming can be uniform in size to a certain extent, and the wood-plastic antibacterial board has uniform strength. And (5) performing one-step molding on the surface decorative layer in the step (4) and the step (5) to obtain the wood-plastic antibacterial board, and polishing.
Further, in the step (4), the decorative glue solution is divided into a base color glue solution, a main color glue solution and a color matching glue solution according to the difference of the added pigments;
and (3) preliminarily forming wood textures on the casting inclined plate by the base color glue solution, the main color glue solution and the color matching glue solution, allowing the wood textures to flow down from the casting inclined plate, covering the surface of the wood-plastic base material passing through the lower part of the casting inclined plate at a constant speed, and forming wood grains on the surface of the wood-plastic base material.
Further, when the base color glue solution passes through the casting inclined plate, firstly, the main color glue solution is sprayed on the base color glue solution along the transverse direction of the casting inclined plate, and then, the color matching glue solution is sprayed on the base color glue solution or the main color glue solution;
a plurality of transverse rails are arranged above the casting inclined plate, and a plurality of main color hoppers filled with main color glue liquid are movably arranged on the transverse rails; a plurality of color matching hoppers filled with color matching glue liquid are arranged above the casting inclined plate in a transversely movable or longitudinally movable manner.
Preferably, the bottom surface of the casting inclined plate is slightly concave downwards to form an arc shape, and the two side edges are provided with baffles, so that the flowing speed of the glue solution in the upper middle part of the casting inclined plate is higher, the flowing speeds of the two sides are lower, the transverse stripes formed by the main color glue solution distributed on the casting inclined plate are different in vertical stretching degree, and the texture similar to wood grains is formed, and the pattern setting of the wood grain imitation is realized. After the glue solution is cast on the surface of the wood-plastic base material, the glue solution can uniformly cover the surface of the base tank based on certain fluidity of the glue solution.
The texture is adjusted by adjusting the inclination angle of the casting inclined plate and the distance between the casting inclined plate and the wood-plastic base material below. The width of the texture of the wood-like texture is adjusted by adjusting the width of the main color glue solution sprayed on the base color glue solution. The color matching glue solution has a darker color than the main color glue solution, and lines sprayed on the base color glue solution or the main color glue solution are thinner, so that the simulation of the wood grain simulation is improved.
Further, the preparation method of the flame-retardant filler comprises the steps of putting 20-24 parts of argil, 5-7 parts of calcined talc, 4-6 parts of potash-soda feldspar and 1.5-2.5 parts of zinc oxide into a ball mill according to the weight ratio, adding water into the ball mill, carrying out ball milling on the mixture to prepare slurry, and carrying out spray granulation on the slurry to obtain powder; firing the powder at 400-600 ℃ for 50-60min, and then grinding to obtain dry fine powder; and uniformly mixing the fine powder and 5 parts by weight of surface treating agent, drying and crushing to obtain the flame-retardant filler.
Further, the preparation method of the antibacterial agent comprises the following steps: mixing 0.8-1 part of silver salt and 1-1.5 parts of nano zinc powder in 10-15 parts of isopropanol to obtain a metal mixed solution, mixing the metal mixed solution with 15-20 parts of polyacrylic acid for 50-60min, and carrying out ultraviolet irradiation at the dose of UVC 12.32kJ/m for the last 5-10min2Obtaining the antibacterial agent.
In the mixing process, the materials are firstly mixed for a long time by stirring at a medium speed, so that the materials are fully and uniformly mixed, and are stirred at a high speed when the ultraviolet rays irradiate, so that the uniform reaction is ensured. Preferably, a closed container is used, and the ultraviolet emitter is arranged at the top of the closed container and is carried out under inert gas atmosphere or nitrogen rangeAnd irradiating at an external line. The UVC ultraviolet ray is adopted to be 12.32kJ/m2Irradiating for 5-10min to obtain sufficient reaction effect and generate nano silver. The nano silver particle size is 20-30 nm through detection, and the nano silver can be uniformly dispersed in the functional decorative layer due to the fact that the nano silver particle size is mixed in organic matters, and a uniform antibacterial effect is achieved. When the ultraviolet irradiation dose is more than or less than UVC 12.32kJ/m2During dosage, the nano silver is affected, so that the particle size of the generated silver simple substance is too large or the generation amount of the silver simple substance is small, and even the silver simple substance is difficult to generate.
The silver salt can be dissolved in isopropanol, and under the irradiation of ultraviolet rays, the mixture of the four substances can generate nano silver. Wherein the addition amount of the nano zinc powder is larger than that of the silver salt. The nano zinc powder has an antibacterial effect, is an inorganic antibacterial agent, and can further enhance the mildew-proof effect of the functional decorative layer by the non-reacted nano zinc powder. Meanwhile, the silver salt can slowly react with the silver salt under the action of external ultraviolet rays within a period of time after the stone plastic floor is produced, so that the silver salt is ensured to be reduced more thoroughly.
Further, in the step (1), the mixing temperature is 95-100 ℃, and the particle size of the prepared granules is 20-100 meshes; in the step (2), the mixing temperature is 110-115 ℃, and the particle size of the foaming particles is 80-100 meshes; in the step (3), the extrusion temperature of the extruder is controlled at 210-215 ℃.
The invention is further illustrated by the following examples.
Example 1
A wood-plastic antibacterial board is composed of a base layer and a surface decorative layer, wherein the surface decorative layer has a wood grain decorative effect.
The preparation method of the wood-plastic antibacterial board comprises the following steps (1) to (5):
(1) after 20 parts of flame-retardant filler and 12 parts of glass fiber are uniformly mixed, 90 parts of carbonized wood powder and 0.5 part of mildew preventive are added and continuously and uniformly mixed to obtain mixed filler; mixing the mixed filler with 150 parts of polyethylene particles, and mixing at 95-100 ℃ to prepare 20-60 mesh granules.
(2) 5 parts of elastomer, 15 parts of toughener, 0.8 part of AC foaming agent and 1.2 parts of activating material are mixed at the temperature of 110-.
(3) And (3) feeding the foaming powder and the foaming particle material into an extruder, controlling the extrusion temperature at 210-215 ℃, and extruding into a mold for molding to obtain the wood-plastic base material.
(4) Uniformly mixing 23 parts of saturated resin, 2 parts of curing agent, 4 parts of cross-linking agent, 4 parts of melamine formaldehyde resin, 2 parts of flame retardant, 1 part of antibacterial agent and 0.1-2 parts of pigment to obtain decorative glue solution, dividing the decorative glue solution into base glue solution, main glue solution and color matching glue 8 solution according to the difference of the added pigment, and applying the decorative glue solution on the surface of the wood-plastic base material;
(5) and curing the wood-plastic base material with the surface decorative layer at 95-110 ℃ and 0.1-0.2MPa to obtain the finished product of the wood-plastic antibacterial board.
In the step (4), the base color glue solution, the main color glue solution and the color matching glue solution are preliminarily formed into wood grains on the casting inclined plate and flow down from the casting inclined plate to cover the surface of the wood-plastic base material passing through the lower part of the casting inclined plate at a constant speed, and wood grains are formed on the surface of the wood-plastic base material. Specifically, when the base color glue solution passes through the casting inclined plate, the main color glue solution is firstly sprayed on the base color glue solution along the transverse direction of the casting inclined plate, and then the color matching glue solution is sprayed on the base color glue solution or the main color glue solution; a plurality of transverse rails are arranged above the casting inclined plate, and a plurality of main color hoppers filled with main color glue liquid are movably arranged on the transverse rails; a plurality of color matching hoppers filled with color matching glue liquid are arranged above the casting inclined plate in a transversely movable or longitudinally movable manner.
The preparation method of the flame-retardant filler comprises the steps of putting 22 parts of argil, 7 parts of calcined talc, 4 parts of potash-sodalite and 2 parts of zinc oxide into a ball mill according to the weight ratio, adding water into the ball mill to perform ball milling to prepare slurry, and performing spray granulation on the slurry to obtain powder; firing the powder material for 50min at 500 ℃, and then grinding to obtain dry fine powder; and uniformly mixing the fine powder and 5 parts by weight of surface treating agent, drying and crushing to obtain the flame-retardant filler.
The preparation method of the antibacterial agent comprises the following steps: mixing 0.8 part of silver salt and 1 part of nano zinc powder in 12 parts of isopropanol to obtain metal mixed solution, and mixing the metal mixed solution with 1 part of polyacrylic acidMixing 8 parts for 50min, and ultraviolet irradiating at UVC 12.32kJ/m for the last 8min2Obtaining the antibacterial agent.
Example 2
A wood-plastic antibacterial board is composed of a base layer and a surface decorative layer, wherein the surface decorative layer has a wood grain decorative effect.
The preparation method of the wood-plastic antibacterial board comprises the following steps (1) to (5):
(1) after 28 parts of flame-retardant filler and 15 parts of glass fiber are uniformly mixed, 100 parts of carbonized wood powder and 0.4 part of mildew preventive are added and continuously and uniformly mixed to obtain mixed filler; mixing the mixed filler with 130 parts of polyethylene particles, and mixing at 95-100 ℃ to prepare 80-100 mesh granules.
(2) Mixing 7 parts of elastomer, 12 parts of toughening agent, 1 part of AC foaming agent and 1 part of activating material at the temperature of 110-.
(3) And (3) feeding the foaming powder and the foaming particle material into an extruder, controlling the extrusion temperature at 210-215 ℃, and extruding into a mold for molding to obtain the wood-plastic base material.
(4) Uniformly mixing 20 parts of saturated resin, 3 parts of curing agent, 5 parts of cross-linking agent, 4 parts of melamine formaldehyde resin, 3 parts of flame retardant, 2 parts of antibacterial agent and 0.1-2 parts of pigment to obtain decorative glue solution, dividing the decorative glue solution into base glue solution, main glue solution and color matching glue 8 solution according to the difference of the added pigment, and applying the decorative glue solution on the surface of the wood-plastic base material;
(5) and curing the wood-plastic base material with the surface decorative layer at 95-110 ℃ and 0.1-0.2MPa to obtain the finished product of the wood-plastic antibacterial board.
In the step (4), the base color glue solution, the main color glue solution and the color matching glue solution are preliminarily formed into wood grains on the casting inclined plate and flow down from the casting inclined plate to cover the surface of the wood-plastic base material passing through the lower part of the casting inclined plate at a constant speed, and wood grains are formed on the surface of the wood-plastic base material. Specifically, when the base color glue solution passes through the casting inclined plate, the main color glue solution is firstly sprayed on the base color glue solution along the transverse direction of the casting inclined plate, and then the color matching glue solution is sprayed on the base color glue solution or the main color glue solution; a plurality of transverse rails are arranged above the casting inclined plate, and a plurality of main color hoppers filled with main color glue liquid are movably arranged on the transverse rails; a plurality of color matching hoppers filled with color matching glue liquid are arranged above the casting inclined plate in a transversely movable or longitudinally movable manner.
The preparation method of the flame-retardant filler comprises the steps of putting 20 parts of argil, 5 parts of calcined talc, 6 parts of potash-sodalite and 2.5 parts of zinc oxide into a ball mill according to the weight ratio, adding water into the ball mill, carrying out ball milling on the mixture to prepare slurry, and carrying out spray granulation on the slurry to obtain powder; firing the powder material for 55min at 600 ℃, and then grinding to obtain dry fine powder; and uniformly mixing the fine powder and 5 parts by weight of surface treating agent, drying and crushing to obtain the flame-retardant filler.
The preparation method of the antibacterial agent comprises the following steps: 0.9 part of silver salt and 1.2 parts of nano zinc powder are mixed in 10 parts of isopropanol to obtain metal mixed solution, the metal mixed solution and 20 parts of polyacrylic acid are mixed for 55min, and ultraviolet irradiation is carried out for the last 5min of mixing, wherein the dose of the ultraviolet irradiation is UVC 12.32kJ/m2, and the antibacterial agent is obtained.
Example 3
A wood-plastic antibacterial board is composed of a base layer and a surface decorative layer, wherein the surface decorative layer has a wood grain decorative effect.
The preparation method of the wood-plastic antibacterial board comprises the following steps (1) to (5):
(1) uniformly mixing 30 parts of flame-retardant filler and 10 parts of glass fiber, adding 80 parts of carbonized wood powder and 0.2 part of mildew preventive, and continuously and uniformly mixing to obtain mixed filler; mixing the mixed filler with 100 parts of polyethylene particles, and mixing at 95-100 ℃ to prepare 20-40 mesh granules.
(2) 8 parts of elastomer, 10 parts of toughener, 0.5 part of AC foaming agent and 1.5 parts of activating material are mixed at the temperature of 110-.
(3) And (3) feeding the foaming powder and the foaming particle material into an extruder, controlling the extrusion temperature at 210-215 ℃, and extruding into a mold for molding to obtain the wood-plastic base material.
(4) Uniformly mixing 25 parts of saturated resin, 4 parts of curing agent, 3 parts of cross-linking agent, 5 parts of melamine formaldehyde resin, 2 parts of flame retardant, 2 parts of antibacterial agent and 0.1-2 parts of pigment to obtain decorative glue solution, dividing the decorative glue solution into base glue solution, main glue solution and color matching glue 8 solution according to the difference of the added pigment, and applying the decorative glue solution on the surface of the wood-plastic base material;
(5) and curing the wood-plastic base material with the surface decorative layer at 95-110 ℃ and 0.1-0.2MPa to obtain the finished product of the wood-plastic antibacterial board.
In the step (4), the base color glue solution, the main color glue solution and the color matching glue solution are preliminarily formed into wood grains on the casting inclined plate and flow down from the casting inclined plate to cover the surface of the wood-plastic base material passing through the lower part of the casting inclined plate at a constant speed, and wood grains are formed on the surface of the wood-plastic base material. Specifically, when the base color glue solution passes through the casting inclined plate, the main color glue solution is firstly sprayed on the base color glue solution along the transverse direction of the casting inclined plate, and then the color matching glue solution is sprayed on the base color glue solution or the main color glue solution; a plurality of transverse rails are arranged above the casting inclined plate, and a plurality of main color hoppers filled with main color glue liquid are movably arranged on the transverse rails; a plurality of color matching hoppers filled with color matching glue liquid are arranged above the casting inclined plate in a transversely movable or longitudinally movable manner.
The preparation method of the flame-retardant filler comprises the steps of putting 24 parts of argil, 6 parts of calcined talc, 5 parts of potash-soda feldspar and 1.5 parts of zinc oxide into a ball mill according to the weight ratio, adding water into the ball mill for ball milling to prepare slurry, and carrying out spray granulation on the slurry to obtain powder; firing the powder material for 60min at 400 ℃, and then grinding to obtain dry fine powder; and uniformly mixing the fine powder and 5 parts by weight of surface treating agent, drying and crushing to obtain the flame-retardant filler.
The preparation method of the antibacterial agent comprises the following steps: mixing 1 part of silver salt and 1.5 parts of nano zinc powder in 15 parts of isopropanol to obtain a metal mixed solution, mixing the metal mixed solution with 15 parts of polyacrylic acid for 60min, and carrying out ultraviolet irradiation in the last 10min of mixing, wherein the dose of the ultraviolet irradiation is UVC 12.32kJ/m2, so as to obtain the antibacterial agent.
Example 4
A wood-plastic antibacterial board is composed of a base layer and a surface decorative layer, wherein the surface decorative layer has a wood grain decorative effect.
The preparation method of the wood-plastic antibacterial board comprises the following steps (1) to (5):
(1) after 20 parts of flame-retardant filler and 12 parts of glass fiber are uniformly mixed, 90 parts of carbonized wood powder and 0.5 part of mildew preventive are added and continuously and uniformly mixed to obtain mixed filler; mixing the mixed filler with 150 parts of polyethylene particles, and mixing at 95-100 ℃ to prepare 80-100 mesh granules.
(2) Mixing 7 parts of elastomer, 12 parts of toughening agent, 1 part of AC foaming agent and 1 part of activating material at the temperature of 110-.
(3) And (3) feeding the foaming powder and the foaming particle material into an extruder, controlling the extrusion temperature at 210-215 ℃, and extruding into a mold for molding to obtain the wood-plastic base material.
(4) Uniformly mixing 23 parts of saturated resin, 2 parts of curing agent, 4 parts of cross-linking agent, 4 parts of melamine formaldehyde resin, 2 parts of flame retardant, 1 part of antibacterial agent and 0.1-2 parts of pigment to obtain decorative glue solution, dividing the decorative glue solution into base glue solution, main glue solution and color matching glue 8 solution according to the difference of the added pigment, and applying the decorative glue solution on the surface of the wood-plastic base material;
(5) and curing the wood-plastic base material with the surface decorative layer at 95-110 ℃ and 0.1-0.2MPa to obtain the finished product of the wood-plastic antibacterial board.
In the step (4), the base color glue solution, the main color glue solution and the color matching glue solution are preliminarily formed into wood grains on the casting inclined plate and flow down from the casting inclined plate to cover the surface of the wood-plastic base material passing through the lower part of the casting inclined plate at a constant speed, and wood grains are formed on the surface of the wood-plastic base material. Specifically, when the base color glue solution passes through the casting inclined plate, the main color glue solution is firstly sprayed on the base color glue solution along the transverse direction of the casting inclined plate, and then the color matching glue solution is sprayed on the base color glue solution or the main color glue solution; a plurality of transverse rails are arranged above the casting inclined plate, and a plurality of main color hoppers filled with main color glue liquid are movably arranged on the transverse rails; a plurality of color matching hoppers filled with color matching glue liquid are arranged above the casting inclined plate in a transversely movable or longitudinally movable manner.
The preparation method of the flame-retardant filler comprises the steps of putting 20 parts of argil, 5 parts of calcined talc, 6 parts of potash-sodalite and 2.5 parts of zinc oxide into a ball mill according to the weight ratio, adding water into the ball mill, carrying out ball milling on the mixture to prepare slurry, and carrying out spray granulation on the slurry to obtain powder; firing the powder material for 55min at 600 ℃, and then grinding to obtain dry fine powder; and uniformly mixing the fine powder and 5 parts by weight of surface treating agent, drying and crushing to obtain the flame-retardant filler.
The preparation method of the antibacterial agent comprises the following steps: mixing 0.8 part of silver salt and 1 part of nano zinc powder in 12 parts of isopropanol to obtain a metal mixed solution, mixing the metal mixed solution with 18 parts of polyacrylic acid for 50min, and carrying out ultraviolet irradiation for the last 8min of mixing, wherein the dose of the ultraviolet irradiation is UVC 12.32kJ/m2Obtaining the antibacterial agent.
Example 5
A wood-plastic antibacterial board is composed of a base layer and a surface decorative layer, wherein the surface decorative layer has a wood grain decorative effect.
The preparation method of the wood-plastic antibacterial board comprises the following steps (1) to (5):
(1) after 28 parts of flame-retardant filler and 15 parts of glass fiber are uniformly mixed, 100 parts of carbonized wood powder and 0.4 part of mildew preventive are added and continuously and uniformly mixed to obtain mixed filler; mixing the mixed filler with 130 parts of polyethylene particles, and mixing at 95-100 ℃ to prepare 20-100 mesh granules.
(2) 5 parts of elastomer, 15 parts of toughener, 0.8 part of AC foaming agent and 1.2 parts of activating material are mixed at the temperature of 110-.
(3) And (3) feeding the foaming powder and the foaming particle material into an extruder, controlling the extrusion temperature at 210-215 ℃, and extruding into a mold for molding to obtain the wood-plastic base material.
(4) Uniformly mixing 23 parts of saturated resin, 2 parts of curing agent, 4 parts of cross-linking agent, 4 parts of melamine formaldehyde resin, 2 parts of flame retardant, 1 part of antibacterial agent and 0.1-2 parts of pigment to obtain decorative glue solution, dividing the decorative glue solution into base glue solution, main glue solution and color matching glue 8 solution according to the difference of the added pigment, and applying the decorative glue solution on the surface of the wood-plastic base material;
(5) and curing the wood-plastic base material with the surface decorative layer at 95-110 ℃ and 0.1-0.2MPa to obtain the finished product of the wood-plastic antibacterial board.
In the step (4), the base color glue solution, the main color glue solution and the color matching glue solution are preliminarily formed into wood grains on the casting inclined plate and flow down from the casting inclined plate to cover the surface of the wood-plastic base material passing through the lower part of the casting inclined plate at a constant speed, and wood grains are formed on the surface of the wood-plastic base material. Specifically, when the base color glue solution passes through the casting inclined plate, the main color glue solution is firstly sprayed on the base color glue solution along the transverse direction of the casting inclined plate, and then the color matching glue solution is sprayed on the base color glue solution or the main color glue solution; a plurality of transverse rails are arranged above the casting inclined plate, and a plurality of main color hoppers filled with main color glue liquid are movably arranged on the transverse rails; a plurality of color matching hoppers filled with color matching glue liquid are arranged above the casting inclined plate in a transversely movable or longitudinally movable manner.
The preparation method of the flame-retardant filler comprises the steps of putting 20 parts of argil, 5 parts of calcined talc, 6 parts of potash-sodalite and 2.5 parts of zinc oxide into a ball mill according to the weight ratio, adding water into the ball mill, carrying out ball milling on the mixture to prepare slurry, and carrying out spray granulation on the slurry to obtain powder; firing the powder material for 50min at 600 ℃, and then grinding to obtain dry fine powder; and uniformly mixing the fine powder and 5 parts by weight of surface treating agent, drying and crushing to obtain the flame-retardant filler.
The preparation method of the antibacterial agent comprises the following steps: mixing 0.8 part of silver salt and 1 part of nano zinc powder in 12 parts of isopropanol to obtain a metal mixed solution, mixing the metal mixed solution with 18 parts of polyacrylic acid for 50min, and carrying out ultraviolet irradiation for the last 8min of mixing, wherein the dose of the ultraviolet irradiation is UVC 12.32kJ/m2Obtaining the antibacterial agent.
The wood-plastic antibacterial board prepared in the embodiment 1-5 is tested, and the wear resistance of the wood-plastic antibacterial board is less than or equal to 0.01 (GB/T18103-; the water absorption is less than or equal to 1.5 percent (GB/T17657-1999); the mildew-proof grade is 0 grade (GB/T1741-2007), the flame-retardant grade reaches UL94V-0, and the wood-plastic antibacterial board has excellent antibacterial effect and good flame-retardant property.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. A wood-plastic antibacterial board is characterized by consisting of a base layer and a surface decorative layer;
the base layer comprises polyethylene, an elastomer, a toughening agent, carbonized wood flour, a flame-retardant filler, glass fiber, an AC foaming agent, an activating material and a mildew preventive; the raw materials of the surface decoration layer comprise unsaturated resin, a curing agent, a cross-linking agent, melamine formaldehyde resin, a flame retardant, an antibacterial agent and a pigment.
2. The wood-plastic antibacterial board according to claim 1, characterized in that the base layer comprises the following raw materials in parts by weight: 100-150 parts of polyethylene, 5-8 parts of elastomer, 10-15 parts of toughening agent, 80-100 parts of carbonized wood powder, 20-30 parts of flame-retardant filler, 10-15 parts of glass fiber, 0.5-1 part of AC foaming agent, 1-1.5 parts of activating material and 0.2-0.5 part of mildew preventive.
3. The wood-plastic antibacterial board as claimed in claim 1, wherein the surface decorative layer comprises the following raw materials in parts by weight: 20-25 parts of unsaturated resin, 2-4 parts of curing agent, 3-5 parts of cross-linking agent, 4-5 parts of melamine formaldehyde resin, 2-3 parts of flame retardant, 1-2 parts of antibacterial agent and 0.1-2 parts of pigment.
4. The wood-plastic antibacterial board according to claim 1, wherein the surface decorative layer has a wood grain decorative effect.
5. A method for preparing a wood-plastic antibacterial board, which is used for preparing the wood-plastic antibacterial board as claimed in any one of claims 1 to 4, and comprises the following steps:
(1) after the flame-retardant filler and the glass fiber are uniformly mixed, adding the carbonized wood powder and the mildew preventive and continuously and uniformly mixing to obtain a mixed filler; mixing the mixed filler with polyethylene particles, and mixing to prepare a granular material;
(2) mixing an elastomer, a toughening agent, an AC foaming agent and an activating material to prepare a foaming granule, and then crushing the foaming granule to prepare 800-mesh foaming powder with the particle size of 600-;
(3) feeding foaming powder and foaming granules into an extruder, extruding into a mold and molding to obtain a wood-plastic base material;
(4) uniformly mixing unsaturated resin, a curing agent, a cross-linking agent, melamine formaldehyde resin, a flame retardant, an antibacterial agent and a pigment to obtain a decorative glue solution, and applying the decorative glue solution on the surface of the wood-plastic base material;
(5) and curing the wood-plastic base material with the surface decorative layer at 95-110 ℃ and 0.1-0.2MPa to obtain the finished product of the wood-plastic antibacterial board.
6. The preparation method of the wood-plastic antibacterial sheet material according to claim 5, wherein in the step (4), the decorative glue solution is divided into a base color glue solution, a main color glue solution and a color matching glue solution according to the difference of the added pigments;
and (3) preliminarily forming wood textures on the casting inclined plate by the base color glue solution, the main color glue solution and the color matching glue solution, allowing the wood textures to flow down from the casting inclined plate, covering the surface of the wood-plastic base material passing through the lower part of the casting inclined plate at a constant speed, and forming wood grains on the surface of the wood-plastic base material.
7. The preparation method of the wood-plastic antibacterial sheet material according to claim 6, wherein when the base color glue solution passes through the casting inclined plate, the main color glue solution is firstly sprayed on the base color glue solution along the transverse direction of the casting inclined plate, and then the color matching glue solution is sprayed on the base color glue solution or the main color glue solution;
a plurality of transverse rails are arranged above the casting inclined plate, and a plurality of main color hoppers filled with main color glue liquid are movably arranged on the transverse rails; a plurality of color matching hoppers filled with color matching glue liquid are arranged above the casting inclined plate in a transversely movable or longitudinally movable manner.
8. The preparation method of the wood-plastic antibacterial sheet material according to claim 5, wherein the preparation method of the flame-retardant filler comprises the steps of putting 20-24 parts by weight of argil, 5-7 parts by weight of calcined talc, 4-6 parts by weight of potash-soda feldspar and 1.5-2.5 parts by weight of zinc oxide into a ball mill, adding water into the ball mill, carrying out ball milling to prepare slurry, and carrying out spray granulation on the slurry to obtain powder;
firing the powder at 400-600 ℃ for 50-60min, and then grinding to obtain dry fine powder;
and uniformly mixing the fine powder and 5 parts by weight of surface treating agent, drying and crushing to obtain the flame-retardant filler.
9. The preparation method of the wood-plastic antibacterial board as claimed in claim 5, wherein the preparation method of the antibacterial agent is as follows: mixing silver salt and nano zinc powder in isopropanol to obtain a metal mixed solution, mixing the metal mixed solution with polyacrylic acid for 50-60min, and carrying out ultraviolet irradiation at the dose of UVC 12.32kJ/m2 for the last 5-10min of mixing to obtain the antibacterial agent.
10. The preparation method of the wood-plastic antibacterial board according to claim 5, characterized in that in the step (1), the mixing temperature is 95-100 ℃, and the particle size of the prepared particles is 20-100 meshes;
in the step (2), the mixing temperature is 110-115 ℃, and the particle size of the foaming particles is 80-100 meshes;
in the step (3), the extrusion temperature of the extruder is controlled at 210-215 ℃.
CN202110200910.4A 2021-02-23 2021-02-23 Wood-plastic antibacterial board and preparation method thereof Pending CN112980079A (en)

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