CN104327530A - Flame-retardant and antistatic wood-plastic composite material and preparation method thereof - Google Patents
Flame-retardant and antistatic wood-plastic composite material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a flame-retardant and antistatic wood-plastic composite material and a preparation method thereof and relates to a wood-plastic composite material and a preparation method thereof. The invention aims at solving the problems of relatively poor flame retardance and relatively high cost of the existing antistatic wood-plastic composite material. The wood-plastic composite material is prepared from the following components in parts by weight: a lignocellulosic material, thermoplastic, a lubricant, an antistatic agent, a flame retardant, a coupling agent and an inorganic filler. The method comprises the following steps: 1) performing hot mixing on the lignocellulosic material, the thermoplastic and the lubricant to obtain a hot-mixed material; 2) putting the hot-mixed material into a cold mixing machine for cold mixing, and adding the weighed antistatic agent, the flame retardant, the coupling agent and the inorganic filler into the cold mixing machine for re-mixing when the temperature is lowered to 40-60 DEG C to obtain a premix; 3) putting the premix into a twin-screw extruder to perform melting, mixing and granulation; and 4) performing extrusion molding or thermoforming to prepare the flame-retardant and antistatic wood-plastic composite material. The flame-retardant and antistatic wood-plastic composite material is used in the fields of indoor buildings, decorations, decoration materials and the like.
Description
Technical field
The present invention relates to a kind of wood plastic composite and preparation method thereof.
Background technology
Wood plastic composite be by a certain proportion of lignocellulosic material and thermoplastic polymer resin and various auxiliary agent through melt extruding, a kind of novel environment-friendly composite material of being prepared from of the complete processing such as injection moulding or hot pressing compound.It has the two-fold advantage of timber and plastics concurrently, the wood appearance of existing similar wood has again the water-fast, corrosion-resistant of thermoplastics and the resistance to advantage such as to damage by worms, and its dimensional stability is better than timber, hardness and modulus are again higher than thermoplastics, production technique is flexible, can secondary processing and recycling be carried out, there is the outstanding feature of environmental protection and unique decorative effect, effectively alleviate timber resources pressure simultaneously, solve plastic pollution problem.At present, WPC goods have been widely used in the fields such as automobile interior trim material, construction and decoration, freight pallet, outdoor tables and chairs, wrapping material, sleeper and indoor furniture.
Along with the decorative effect of the raising of wood plastic composite production technology, the expansion of industry size and himself outstanding environmental protection characteristic and uniqueness, it expands gradually in the application of indoor field (as door and window, floor, furniture etc.).But, because the thermoplastics of one of the main raw material of wood plastic composite is good electrical insulator, with the poor conductor still belonging to electricity after lignocellulosic material compound, in use easily gather a large amount of static charges, danger such as causing dust suction, discharge, puncture, even cause burning or blast, there is huge potential safety hazard.In addition, wood plastic composite belongs to red label goods, which greatly limits the Application Areas of wood plastic composite, therefore at some value segments, the application as fields such as computer room, Intelligent Building, high-grade office building, Operation theatre, fabrication of electronic components workshop and munition containers is all restricted.Therefore, carry out fire-retardant to it and antistatic treatment is very necessary.
At present, antistatic research report about wood plastic composite is less, publication number is that the Chinese patent application of CN 102382399A discloses a kind of anti-electrostatic polyvinyl chloride based wood-plastic composite material and preparation method, adopt carbon black and conductive mica powder as static inhibitor, add a certain amount of rare-earth stabilizer, obtained wood powder/polyvinyl chloride composite materials has electrostatic-proof function and excellent mechanical property simultaneously; Publication number is that the Chinese patent application of CN 102627795A discloses a kind of Mildewproof anti-static plastic-wood composite material and preparation method thereof, the plastic substrate adopted is polyethylene, static inhibitor is nylon 12 class polyamide elastomer polymer antistatic agent, with the addition of a certain amount of antimildew and antibacterial agent to obtain the antistatic double effects of mildew-resistant simultaneously.
Although existing antistatic wood plastic composite has certain antistatic property, the flame retardant properties requirement that should possess as indoor material cannot be met, and have that static inhibitor addition is large, the shortcoming of high expensive, limit practical application.
Summary of the invention
The present invention is that will to solve existing antistatic wood plastic composite flame retardant properties poor, and the problem of high expensive, a kind of flame-retardant and anti-static wood plastic composite and preparation method thereof is provided.
In indoor or public place use procedure, a large amount of static charge is easily gathered for wood plastic composite, cause the danger such as dust suction, electric discharge, consider again that it is easy to burning simultaneously, and the problem that after burning, fire hazard is larger, with acquisition, there is the wood plastic composite of fire-retardant and antistatic double effects by interpolation fire retardant and static inhibitor, thus expand the Application Areas of wood plastic composite further.
Flame-retardant and anti-static wood plastic composite of the present invention is made up of 20 ~ 70 parts of lignocellulosic materials, 30 ~ 80 parts of thermoplasticss, 1 ~ 3 part of lubricant, 2 ~ 15 parts of static inhibitor, 5 ~ 20 parts of fire retardants, 2 ~ 6 parts of coupling agents and 0 ~ 5 part of mineral filler by weight; Wherein the total amount of lignocellulosic material and thermoplastics is 100 parts, and described static inhibitor is that one or more in graphitized carbon black, nickel powder, copper powder, graphene oxide, carbon nanotube are by arbitrarily than the mixture formed; Described fire retardant be expansible black lead or for expansible black lead and one or more in ammonium polyphosphate, microencapsulated powder oil, nano-aluminum hydroxide, nano-sized magnesium hydroxide, nano organic montmorillonite, nano-zinc borate by arbitrarily than the mixture formed.
The preparation method of above-mentioned flame-retardant and anti-static wood plastic composite, carries out according to the following steps:
One, take 20 ~ 70 parts of lignocellulosic materials, 30 ~ 80 parts of thermoplasticss, 1 ~ 3 part of lubricant, 2 ~ 15 parts of static inhibitor, 5 ~ 20 parts of fire retardants, 2 ~ 6 parts of coupling agents and 0 ~ 5 part of mineral filler by weight, wherein the total amount of lignocellulosic material and thermoplastics is 100 parts;
Two, the lignocellulosic material, thermoplastics and the lubricant that take heat in high-speed mixer mixed 3 ~ 10 minutes, temperature controls, at 50 ~ 120 DEG C, to obtain hot batch mixing;
Three, hot batch mixing step 2 obtained is put and to be carried out cold mixed to cold mixer, when temperature is down to 40 ~ 60 DEG C, the static inhibitor taken, fire retardant, coupling agent and mineral filler to be added in cold mixer remix 5 ~ 10 minutes, obtains Preblend;
Four, Preblend being put into barrel temperature is 150 ~ 190 DEG C, and die temperature is 165 ~ 190 DEG C, and screw speed is carry out melting mixing granulation in the twin screw extruder of 30 ~ 150r/min;
Five, the pellet prepared by twin screw extruder again by single screw extrusion machine or conical double screw extruder extrusion moulding, or adopts thermocompressor by hot-forming, i.e. obtained flame-retardant and anti-static wood plastic composite;
Wherein lignocellulosic material described in step one be one or more in wood powder, bamboo powder, powdered rice hulls, straw powder, shell powder, bagasse, flaxen fiber by arbitrarily than the mixture formed, its particle order number is 40 ~ 160 orders, and water ratio is lower than 2%; Described thermoplastics is that one or more in polyethylene, polypropylene, polyethylene reclaimed materials, polypropylene reclaimed material, polystyrene reclaimed materials are by arbitrarily than the mixture formed; Described lubricant is that one or more in paraffin, polyethylene wax, Poly Propylene Wax, oxidized polyethlene wax, stearic acid, Zinic stearas, calcium stearate are by arbitrarily than the mixture formed; Described static inhibitor is that one or more in graphitized carbon black, nickel powder, copper powder, graphene oxide, carbon nanotube are by arbitrarily than the mixture formed; Described fire retardant be expansible black lead or for expansible black lead and one or more in ammonium polyphosphate, microencapsulated powder oil, nano-aluminum hydroxide, nano-sized magnesium hydroxide, nano organic montmorillonite, nano-zinc borate by arbitrarily than the mixture formed; Described coupling agent is that one or more in titanic acid ester, Aluminate, silane coupling agent, modified by maleic acid anhydride graft polyethylene, maleic anhydride grafted PP, maleic anhydride graft ethylene-propylene rubber(EPR) are by arbitrarily than the mixture formed; Described mineral filler is that one or more in Paris white, talcum powder, flyash are by arbitrarily than the mixture formed.
The present invention utilizes the expandable flame retardant effect of expansible black lead efficient physical and has collaborative antistatic property with static inhibitor of the present invention, effectively can realize the flame-retardant and anti-static effect to polyvinyl or polypropylene base wood-plastic composite material, under the condition meeting the requirement of material of construction flame-retardant standard, only need to add a small amount of static inhibitor, surface resistivity can be reached lower than 1.0 × 10
-9the Standard of the electronic information system machine rooms design specifications of Ω.
The present invention gives wood plastic composite good fire-retardant and antistatic property by interpolation static inhibitor and fire retardant, its flame retardant properties can arrive the requirement of house decorative material fire-protection rating, wherein antistatic property reaches GB50174-2008, and surface resistivity is lower than 1.0 × 10
-9Ω, the imparting of these performances, not only significantly reduce the fire safety evaluating potential problem that this kind of matrix material brings as indoor floor or other finishing material, also reduce simultaneously due to electrostatic bring to the person and otherwise potential safety hazard, the Application Areas of wood plastic composite is expanded.
Flame-retardant and anti-static wood plastic composite prepared by the present invention not only has fire-retardant and antistatic property preferably, and maintain good mechanical property, can be widely used in having certain requirements to fire-retardant and antistatic property the key areas such as high-grade office building, intelligent office block, exchange room, Operation theatre, fabrication of electronic components workshop.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: present embodiment flame-retardant and anti-static wood plastic composite is made up of 20 ~ 70 parts of lignocellulosic materials, 30 ~ 80 parts of thermoplasticss, 1 ~ 3 part of lubricant, 2 ~ 15 parts of static inhibitor, 5 ~ 20 parts of fire retardants, 2 ~ 6 parts of coupling agents and 0 ~ 5 part of mineral filler by weight; Wherein the total amount of lignocellulosic material and thermoplastics is 100 parts, and described static inhibitor is that one or more in graphitized carbon black, nickel powder, copper powder, graphene oxide, carbon nanotube are by arbitrarily than the mixture formed; Described fire retardant be expansible black lead or for expansible black lead and one or more in ammonium polyphosphate, microencapsulated powder oil, nano-aluminum hydroxide, nano-sized magnesium hydroxide, nano organic montmorillonite, nano-zinc borate by arbitrarily than the mixture formed.
Embodiment two: present embodiment and embodiment one unlike: described lignocellulosic material be one or more in wood powder, bamboo powder, powdered rice hulls, straw powder, shell powder, bagasse, flaxen fiber by arbitrarily than the mixture formed, its particle order number is 40 ~ 160 orders, and water ratio is lower than 2%.Other is identical with embodiment one.
Embodiment three: present embodiment and embodiment one or two unlike: described thermoplastics be one or more in polyethylene, polypropylene, polyethylene reclaimed materials, polypropylene reclaimed material, polystyrene reclaimed materials by arbitrarily than the mixture formed.Other is identical with embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three are that one or more in paraffin, polyethylene wax, Poly Propylene Wax, oxidized polyethlene wax, stearic acid, Zinic stearas, calcium stearate are by arbitrarily than the mixture formed unlike: described lubricant.Other is identical with one of embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four are that one or more in titanic acid ester, Aluminate, silane coupling agent, modified by maleic acid anhydride graft polyethylene, maleic anhydride grafted PP, maleic anhydride graft ethylene-propylene rubber(EPR) (EPDM-MA) are by arbitrarily than the mixture formed unlike: described coupling agent.Other is identical with one of embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to five are that one or more in Paris white, talcum powder, flyash are by arbitrarily than the mixture formed unlike: described mineral filler.Other is identical with one of embodiment one to five.
Embodiment seven: the preparation method of present embodiment flame-retardant and anti-static wood plastic composite, carry out according to the following steps:
One, take 20 ~ 70 parts of lignocellulosic materials, 30 ~ 80 parts of thermoplasticss, 1 ~ 3 part of lubricant, 2 ~ 15 parts of static inhibitor, 5 ~ 20 parts of fire retardants, 2 ~ 6 parts of coupling agents and 0 ~ 5 part of mineral filler by weight, wherein the total amount of lignocellulosic material and thermoplastics is 100 parts;
Two, the lignocellulosic material, thermoplastics and the lubricant that take heat in high-speed mixer mixed 3 ~ 10 minutes, temperature controls, at 50 ~ 120 DEG C, to obtain hot batch mixing;
Three, hot batch mixing step 2 obtained is put and to be carried out cold mixed to cold mixer, when temperature is down to 40 ~ 60 DEG C, the static inhibitor taken, fire retardant, coupling agent and mineral filler to be added in cold mixer remix 5 ~ 10 minutes, obtains Preblend;
Four, Preblend being put into barrel temperature is 150 ~ 190 DEG C, and die temperature is 165 ~ 190 DEG C, and screw speed is carry out melting mixing granulation in the twin screw extruder of 30 ~ 150r/min;
Five, the pellet prepared by twin screw extruder again by single screw extrusion machine or conical double screw extruder extrusion moulding, or adopts thermocompressor by hot-forming, i.e. obtained flame-retardant and anti-static wood plastic composite;
Wherein lignocellulosic material described in step one be one or more in wood powder, bamboo powder, powdered rice hulls, straw powder, shell powder, bagasse, flaxen fiber by arbitrarily than the mixture formed, its particle order number is 40 ~ 160 orders, and water ratio is lower than 2%; Described thermoplastics is that one or more in polyethylene, polypropylene, polyethylene reclaimed materials, polypropylene reclaimed material, polystyrene reclaimed materials are by arbitrarily than the mixture formed; Described lubricant is that one or more in paraffin, polyethylene wax, Poly Propylene Wax, oxidized polyethlene wax, stearic acid, Zinic stearas, calcium stearate are by arbitrarily than the mixture formed; Described static inhibitor is that one or more in graphitized carbon black, nickel powder, copper powder, graphene oxide, carbon nanotube are by arbitrarily than the mixture formed; Described fire retardant be expansible black lead or for expansible black lead and one or more in ammonium polyphosphate, microencapsulated powder oil, nano-aluminum hydroxide, nano-sized magnesium hydroxide, nano organic montmorillonite, nano-zinc borate by arbitrarily than the mixture formed; Described coupling agent is that one or more in titanic acid ester, Aluminate, silane coupling agent, modified by maleic acid anhydride graft polyethylene, maleic anhydride grafted PP, maleic anhydride graft ethylene-propylene rubber(EPR) are by arbitrarily than the mixture formed; Described mineral filler is that one or more in Paris white, talcum powder, flyash are by arbitrarily than the mixture formed.
Embodiment eight: present embodiment and embodiment seven unlike: in step 2, temperature controls at 80 DEG C.Other is identical with embodiment seven.
Embodiment nine: present embodiment and embodiment seven or eight unlike: treat in step 3 that temperature is down to 50 DEG C.Other is identical with embodiment seven or eight.
Embodiment ten: one of present embodiment and embodiment seven to nine unlike: in step 4, Preblend being put into barrel temperature is 155 ~ 185 DEG C, die temperature is 180 DEG C, and screw speed is carry out melting mixing granulation in the twin screw extruder of 80r/min.Other is identical with one of embodiment seven to nine.
Embodiment 1:
The preparation method of the present embodiment flame-retardant and anti-static wood plastic composite, carries out according to the following steps:
One, 60 parts of wood powders, 40 parts of polypropylene and 1.5 parts of lubricants heat in high-speed mixer are mixed 8 minutes, temperature controls, at 80 DEG C, to obtain hot batch mixing; Described lubricant by paraffin and stearic acid in mass ratio 2:1 form;
Two, hot batch mixing step 2 obtained is put and carry out cold mixing to cold mixer, when temperature is down to 50 DEG C, 3 parts of graphitized carbon blacks, 3 parts of maleic anhydride inoculated polypropylenes, 5 parts of ammonium polyphosphates, 15 parts of expansible black leads to be added in cold mixer remix 10 minutes, obtain Preblend;
Three, Preblend is put into barrel temperature is 155 ~ 185 DEG C, die temperature is 180 DEG C, screw speed is carry out melting mixing granulation in the twin screw extruder of 30r/min;
Four, the pellet obtained is put into temperature is 155 ~ 185 DEG C, die temperature is 180 DEG C, screw speed is carry out extrusion moulding in the single screw extrusion machine of 30r/min, i.e. obtained flame-retardant and anti-static wood plastic composite.
In step one, the water ratio of wood powder is lower than 2%, and the particle order number of wood powder is 40 ~ 80 orders.
Embodiment 2:
The preparation method of the present embodiment flame-retardant and anti-static wood plastic composite, carries out according to the following steps:
One, 50 parts of wood powders, 50 parts of polypropylene and 1 part of lubricant heat in high-speed mixer are mixed 8 minutes, temperature controls, at 80 DEG C, to obtain hot batch mixing; Described lubricant by paraffin and stearic acid in mass ratio 1:1 form;
Two, hot batch mixing step 2 obtained is put and carry out cold mixing to cold mixer, when temperature is down to 50 DEG C, 3 parts of graphitized carbon blacks, 6 parts of polymer permanent antistatic agents, 5 parts of ammonium polyphosphates, 10 parts of expansible black leads, 2 parts of maleic anhydride inoculated polypropylenes and 1 part of Paris white to be added in cold mixer remix 10 minutes, obtain Preblend;
Three, Preblend is put into barrel temperature is 155 ~ 185 DEG C, die temperature is 180 DEG C, screw speed is carry out melting mixing granulation in the twin screw extruder of 80r/min;
Four, the pellet obtained is put into temperature is 155 ~ 185 DEG C, die temperature is 180 DEG C, screw speed is carry out extrusion moulding in the single screw extrusion machine of 30r/min, i.e. obtained flame-retardant and anti-static wood plastic composite.
In step one, the water ratio of wood powder is lower than 2%, and the particle order number of wood powder is 80 ~ 100 orders.
Embodiment 3:
The preparation method of the present embodiment flame-retardant and anti-static wood plastic composite, carries out according to the following steps:
One, 60 parts of wood powders, 40 parts of polypropylene and 1.5 parts of lubricants heat in high-speed mixer are mixed 10 minutes, temperature controls, at 80 DEG C, to obtain hot batch mixing; Described lubricant by paraffin and stearic acid in mass ratio 2:1 form;
Two, hot batch mixing step 2 obtained is put and carry out cold mixing to cold mixer, when temperature is down to 50 DEG C, 8 parts of graphitized carbon blacks, 2 parts of nickel powders, 15 parts of expansible black leads, 4 parts of maleic anhydride inoculated polypropylenes and 1 part of talcum powder to be added in cold mixer remix 10 minutes, obtain Preblend;
Three, Preblend is put into barrel temperature is 155 ~ 175 DEG C, die temperature is 180 DEG C, screw speed is carry out melting mixing granulation in the twin screw extruder of 60r/min;
Four, the pellet obtained is put into temperature is 155 ~ 185 DEG C, die temperature is 185 DEG C, screw speed is carry out extrusion moulding in the single screw extrusion machine of 30r/min, i.e. obtained flame-retardant and anti-static wood plastic composite.
In step one, the water ratio of wood powder is lower than 2%, and the particle order number of wood powder is 80 ~ 100 orders.
Embodiment 4:
The preparation method of the present embodiment flame-retardant and anti-static wood plastic composite, carries out according to the following steps:
One, 60 parts of wood powders, 40 parts of polypropylene and 1.5 parts of lubricants heat in high-speed mixer are mixed 10 minutes, temperature controls, at 80 DEG C, to obtain hot batch mixing; Described lubricant by paraffin and stearic acid in mass ratio 2:1 form;
Two, hot batch mixing step 2 obtained is put and carry out cold mixing to cold mixer, when temperature is down to 40 DEG C, 4 parts of graphitized carbon blacks, 4 parts of microencapsulated powder oil, 12 parts of expansible black leads, 4 parts of maleic anhydride inoculated polypropylenes to be added in cold mixer remix 10 minutes, obtain Preblend;
Three, Preblend is put into barrel temperature is 155 ~ 190 DEG C, die temperature is 180 DEG C, screw speed is carry out melting mixing granulation in the twin screw extruder of 80r/min;
Four, the pellet obtained is put into temperature is 155 ~ 185 DEG C, die temperature is 185 DEG C, screw speed is carry out extrusion moulding in the single screw extrusion machine of 30r/min, i.e. obtained flame-retardant and anti-static wood plastic composite.
In step one, the water ratio of wood powder is lower than 2%, and the particle order number of wood powder is 40 ~ 80 orders.
Fire-retardant, the antistatic and mechanical performance index of embodiment 1-4 product is in table 1.
Table 1 embodiment 1-4 product related performance indicators
The present invention gives wood plastic composite good fire-retardant and antistatic property by interpolation static inhibitor and fire retardant, its flame retardant properties can arrive the requirement of house decorative material fire-protection rating, wherein antistatic property reaches GB50174-2008, and surface resistivity is lower than 1.0 × 10
-9Ω, the imparting of these performances, not only significantly reduce the fire safety evaluating potential problem that this kind of matrix material brings as indoor floor or other finishing material, also reduce simultaneously due to electrostatic bring to the person and otherwise potential safety hazard, the Application Areas of wood plastic composite is expanded.
Claims (10)
1. a flame-retardant and anti-static wood plastic composite, is characterized in that this wood plastic composite is made up of 20 ~ 70 parts of lignocellulosic materials, 30 ~ 80 parts of thermoplasticss, 1 ~ 3 part of lubricant, 2 ~ 15 parts of static inhibitor, 5 ~ 20 parts of fire retardants, 2 ~ 6 parts of coupling agents and 0 ~ 5 part of mineral filler by weight; Wherein the total amount of lignocellulosic material and thermoplastics is 100 parts, and described static inhibitor is that one or more in graphitized carbon black, nickel powder, copper powder, graphene oxide, carbon nanotube are by arbitrarily than the mixture formed; Described fire retardant be expansible black lead or for expansible black lead and one or more in ammonium polyphosphate, microencapsulated powder oil, nano-aluminum hydroxide, nano-sized magnesium hydroxide, nano organic montmorillonite, nano-zinc borate by arbitrarily than the mixture formed.
2. a kind of flame-retardant and anti-static wood plastic composite according to claim 1, it is characterized in that described lignocellulosic material is that one or more in wood powder, bamboo powder, powdered rice hulls, straw powder, shell powder, bagasse, flaxen fiber are by arbitrarily than the mixture formed, its particle order number is 40 ~ 160 orders, and water ratio is lower than 2%.
3. a kind of flame-retardant and anti-static wood plastic composite according to claim 1, is characterized in that described thermoplastics is that one or more in polyethylene, polypropylene, polyethylene reclaimed materials, polypropylene reclaimed material, polystyrene reclaimed materials are by arbitrarily than the mixture formed.
4. a kind of flame-retardant and anti-static wood plastic composite according to claim 1, is characterized in that described lubricant is that one or more in paraffin, polyethylene wax, Poly Propylene Wax, oxidized polyethlene wax, stearic acid, Zinic stearas, calcium stearate are by arbitrarily than the mixture formed.
5. a kind of flame-retardant and anti-static wood plastic composite according to claim 1, is characterized in that described coupling agent is that one or more in titanic acid ester, Aluminate, silane coupling agent, modified by maleic acid anhydride graft polyethylene, maleic anhydride grafted PP, maleic anhydride graft ethylene-propylene rubber(EPR) are by arbitrarily than the mixture formed.
6. a kind of flame-retardant and anti-static wood plastic composite according to claim 1, is characterized in that described mineral filler is that one or more in Paris white, talcum powder, flyash are by arbitrarily than the mixture formed.
7. the preparation method of flame-retardant and anti-static wood plastic composite, is characterized in that the method is carried out according to the following steps:
One, take 20 ~ 70 parts of lignocellulosic materials, 30 ~ 80 parts of thermoplasticss, 1 ~ 3 part of lubricant, 2 ~ 15 parts of static inhibitor, 5 ~ 20 parts of fire retardants, 2 ~ 6 parts of coupling agents and 0 ~ 5 part of mineral filler by weight, wherein the total amount of lignocellulosic material and thermoplastics is 100 parts;
Two, the lignocellulosic material, thermoplastics and the lubricant that take heat in high-speed mixer mixed 3 ~ 10 minutes, temperature controls, at 50 ~ 120 DEG C, to obtain hot batch mixing;
Three, hot batch mixing step 2 obtained is put and to be carried out cold mixed to cold mixer, when temperature is down to 40 ~ 60 DEG C, the static inhibitor taken, fire retardant, coupling agent and mineral filler to be added in cold mixer remix 5 ~ 10 minutes, obtains Preblend;
Four, Preblend being put into barrel temperature is 150 ~ 190 DEG C, and die temperature is 165 ~ 190 DEG C, and screw speed is carry out melting mixing granulation in the twin screw extruder of 30 ~ 150r/min;
Five, the pellet prepared by twin screw extruder again by single screw extrusion machine or conical double screw extruder extrusion moulding, or adopts thermocompressor by hot-forming, i.e. obtained flame-retardant and anti-static wood plastic composite;
Wherein lignocellulosic material described in step one be one or more in wood powder, bamboo powder, powdered rice hulls, straw powder, shell powder, bagasse, flaxen fiber by arbitrarily than the mixture formed, its particle order number is 40 ~ 160 orders, and water ratio is lower than 2%; Described thermoplastics is that one or more in polyethylene, polypropylene, polyethylene reclaimed materials, polypropylene reclaimed material, polystyrene reclaimed materials are by arbitrarily than the mixture formed; Described lubricant is that one or more in paraffin, polyethylene wax, Poly Propylene Wax, oxidized polyethlene wax, stearic acid, Zinic stearas, calcium stearate are by arbitrarily than the mixture formed; Described static inhibitor is that one or more in graphitized carbon black, nickel powder, copper powder, graphene oxide, carbon nanotube are by arbitrarily than the mixture formed; Described fire retardant be expansible black lead or for expansible black lead and one or more in ammonium polyphosphate, microencapsulated powder oil, nano-aluminum hydroxide, nano-sized magnesium hydroxide, nano organic montmorillonite, nano-zinc borate by arbitrarily than the mixture formed; Described coupling agent is that one or more in titanic acid ester, Aluminate, silane coupling agent, modified by maleic acid anhydride graft polyethylene, maleic anhydride grafted PP, maleic anhydride graft ethylene-propylene rubber(EPR) are by arbitrarily than the mixture formed; Described mineral filler is that one or more in Paris white, talcum powder, flyash are by arbitrarily than the mixture formed.
8. the preparation method of flame-retardant and anti-static wood plastic composite according to claim 7, is characterized in that in step 2, temperature controls at 80 DEG C.
9. the preparation method of flame-retardant and anti-static wood plastic composite according to claim 7, is characterized in that treating in step 3 that temperature is down to 50 DEG C.
10. the preparation method of flame-retardant and anti-static wood plastic composite according to claim 7, it is characterized in that in step 4, Preblend being put into barrel temperature is 155 ~ 185 DEG C, die temperature is 180 DEG C, and screw speed is carry out melting mixing granulation in the twin screw extruder of 80r/min.
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