CN110003558A - The preparation method and application of modified wood plastic composite - Google Patents
The preparation method and application of modified wood plastic composite Download PDFInfo
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- CN110003558A CN110003558A CN201910309344.3A CN201910309344A CN110003558A CN 110003558 A CN110003558 A CN 110003558A CN 201910309344 A CN201910309344 A CN 201910309344A CN 110003558 A CN110003558 A CN 110003558A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The invention discloses a kind of preparation methods of modified wood plastic composite, thawing, dyeing, mixing, molding including high density polyethylene (HDPE) and etc., wood plastic composite includes following component by weight percentage: high density polyethylene (HDPE) 50~70%；Nylon plastic(s) powder 10~20%；Wood fiber powder 20~30%.By the way that above-mentioned each component to be uniformly mixed, wood plastic composite is made.Modified wood plastic composite of the invention uses high density polyethylene (HDPE) for primary raw material, it is subject to nylon plastic(s) and wood fiber powder mixing again, wood fiber powder is added, so that it is coated by high density polyethylene (HDPE) molten liquid completely, so that wood fiber powder hygroscopicity greatly reduces, dispersibility, oxidative resistance and anti-flammability greatly improve, and then improve the intensity of wood plastic composite；And the addition of nylon plastic(s), its intensity is further improved, the performances such as product oxidative resistance, anti-folding, bending resistance for manufacturing by the wood plastic composite are fabulous, can satisfy use demand.
Description
Technical field
The present invention relates to Material Field, in particular to a kind of preparation method and application of modified wood plastic composite.
Background technique
Wood plastic composite (Wood-Plastic Composites, WPC) is that domestic and international one kind being surging forward in recent years is new
Type composite material, refers to using polyethylene, polypropylene and polyvinyl chloride etc., instead of common resin adhesive, with more than 50% with
On the useless plant fiber such as wood powder, rice husk, stalk be mixed into new wood materials, then through plastics such as extruding, molding, injection mouldings
Processing technology, the plate or profile produced.It is mainly used for the industries such as building materials, furniture, logistics packaging.
As shown in the Chinese invention patent of Patent No. 201310417130.0, it is multiple that it discloses a kind of PVC foam wood/plastics
Condensation material and its manufacturing method, the wood plastic composite are made of the raw material of following parts by weight: 20-70 parts of PVC resin powder, wood powder
1-55 parts, 5-40 parts of Paris white, 0.1-0.5 parts of sodium bicarbonate, azo-compound or hydrazine derivate or semicarbazide compound or
0.3-0.6 parts of nitroso compound, 2-10 parts of foaming control agent, 1.5-6 parts of compound stabilizer, 0.7-2.1 parts of lubricant, soybean
0.5-1.2 parts oily, 2.5-5.5 parts of impact modifier, 0.5-3 parts of processing aid.
Current wood plastic composite is similar to above-mentioned composite material, then is subject to using PVC plastic as primary raw material
Precipitated calcium carbonate and a small amount of wood powder are mixed.
Preparation process is the first mixing by precipitated calcium carbonate powder and PVC, then adds wood powder.However, above-mentioned wood moulding is multiple
The constituent of condensation material is more, and preparation process is comparatively laborious；Mixed above-mentioned wood plastic composite is squeezed through extruder simultaneously
After product is made out, due to the presence of Paris white, it may appear that the bond degree and degrees of fusion of PVC plastic reduce, the toughness of product
It reduces, a series of problems, such as wood powder is not merged with precipitated calcium carbonate powder, product will appear gap, and then causes finished product easy to oxidize
It fades, the defects of intensity is high, frangibility, it is difficult to meet user's needs.
Summary of the invention
The object of the present invention is to provide a kind of preparation method and application of modified wood plastic composite, the modified wood mouldings
Composite material has anti-folding, intensity height, resistance to oxidation, can recycle, environmental protection, many advantages, such as plasticity is strong, can answer extensively
For making the fields such as the furniture recycled, plate, 3D printing material, it is at least able to solve one of above problem.
According to an aspect of the invention, there is provided a kind of preparation method of modified wood plastic composite, wood plastics composite
Material includes following component by weight percentage:
High density polyethylene (HDPE) 50~70%；
Nylon plastic(s) powder 10~20%；
Coloring agent 0~6%；
Wood fiber powder 20~30%；
The preparation method of above-mentioned wood plastic composite the following steps are included:
The thawing of S1, high density polyethylene (HDPE): high-speed mixer hot melt is added into flowing shape liquid in high density polyethylene (HDPE), is obtained
It is spare to molten plastic liquid；
S2, dyeing: coloring agent is added in high-speed mixer, molten plastic liquid is dyed；
S3, mixing: high-speed mixer is added in wood fiber powder, nylon plastic(s) powder, is mixed evenly, it is multiple to obtain wood moulding
Condensation material mixed liquor；
S4, molding: mixed liquor is squeezed out into strips through extruding machine, spare.
Wherein, high density polyethylene (HDPE) (English name: High Density Polyethylene, abbreviation HDPE) melts
It is 130~200 DEG C at liquid required temperature, plasticity is strong, and gluing is strong；High density polyethylene (HDPE) is thermoplastic, belongs to ring
Material is protected, heating reaches fusing point, can recycling and reusing.
Nylon plastic(s) powder (i.e. polyamide, English name: Polyamide, abbreviation PA), being melted into liquid required temperature is
220~400 DEG C, toughness is extremely strong；Nylon is thermoplastic, belongs to environmental-protecting material, and heating reaches fusing point, i.e., recyclable sharp again
With.Nylon plastic(s) powder of the invention can be commercially available nylon-66 plastic powder.
Coloring agent can be color essence, can according to need and dye to plastics liquid, to meet different use demands.
Wood fiber powder: can be the wood fiber powders such as commercially available bamboo powder, continuous high temperature and it is dry it is aerobic, without bright
Ignition temperature in the case where fire is 260~380 DEG C, wood fiber powder have many advantages, such as to inhale colloidality by force, good toughness.
Modified wood plastic composite of the invention uses high density polyethylene (HDPE) for primary raw material, then be subject to nylon plastic(s) and
Wood fiber powder mixing, is added wood fiber powder, so that it is coated by high density polyethylene (HDPE) molten liquid completely, so that wood fibre
Powder hygroscopicity greatly reduces, and dispersibility, oxidative resistance and anti-flammability greatly improve, and then improve the strong of wood plastic composite
Degree；And the addition of nylon plastic(s), its intensity is further improved, the product resistance to oxidation manufactured by the wood plastic composite
The performances such as property, anti-folding, bending resistance are fabulous, can satisfy use demand.
In some embodiments, modified wood plastic composite includes following component by weight percentage: highly dense
Spend polyethylene 50~60%, nylon plastic(s) powder 10~15% and wood fiber powder 20~25%, coloring agent 3~6%.
In some embodiments, modified wood plastic composite includes following component by weight percentage: highly dense
Spend polyethylene 60%, nylon plastic(s) powder 10% and wood fiber powder 25%, coloring agent 5%.
In some embodiments, after step s4 further include step S5:
S5, grinding: strip wood plastic composite made from S4 is ground using grinder, obtains the wood moulding of granular
Composite material.
In some embodiments, in step sl, the heating temperature of high-speed mixer is 150~180 DEG C.
In some embodiments, in step s3, the order of addition of wood fiber powder and nylon plastic(s) powder are as follows: be first added
Wood fiber powder adds nylon plastic(s) powder after mixing evenly.
It is first by high density polyethylene (HDPE) through 150~180 DEG C in modified wood plastic composite manufacturing process of the invention
At a temperature of be persistently melted into the liquid of flow regime, be then placed in coloring agent and dyed, then wood fiber powder is placed in poly- second
It is uniformly mixed in alkene plastics liquid, finally nylon plastic(s) powder powder is added.The preparation process letter of wood plastic composite of the invention
Single, raw material is few.
Since the temperature of preparation process is always held at 150~180 DEG C, high density polyethylene (HDPE) can be melted, but the temperature
The fusing point of degree and not up to nylon plastic(s), therefore, the nylon plastic(s) powder of addition will not melt, but be softened fusion in polyethylene
In the mixed liquor of wood fiber powder, three after mixing, then by extruding machine is squeezed out into strips or after graininess, with grinding
The special equipments such as grinding machine are processed into powdered by required specification, then are applied in practical application.
After wood fiber powder is added in molten plastic liquid, it can be wrapped by plastics liquid, be provided to wood fiber powder
Oxygen-free environment, wood fiber powder do not allow easy firing in this oxygen-free environment or become fragile, and both ensure that the ortho states of wood fiber powder,
The intensity of wood plastic composite can be enhanced again.
According to another aspect of the present invention, a kind of wood-plastic clad plate prepared using above-mentioned wood plastic composite is additionally provided
Material, wood-plastic composite panel are prepared using powdered wood plastic composite prepared by above-mentioned preparation method as raw material, wood plastics composite
Plate includes following component by weight percentage:
Carbonized woody fiber powder, moisture content are to account for the 50% to 90% of total amount between 0.1% to 10%；
Powdered wood plastic composite, accounts for the 10% to 60% of total amount；
Fire protection flame retarding powder, accounts for total amount 1% to 10%.
Wherein, carbonized woody fiber powder takes to one or more of fast growing wood, Eucalyptus, poplar, pine, bamboo and wood；
Timber materials include discarded leftover pieces, brush wood, wood shavings, the wooden chaff.
Fire protection flame retarding meal component is phosphate fireproof powder, aluminium phosphite fireproof powder, alumina powder, thermosetting plastics fireproof powder
Last one or more of them.
In accordance with a further aspect of the present invention, production, the recovery process of above-mentioned wood-plastic composite panel, above-mentioned wood moulding are additionally provided
The production of composite board, recovery process successively include:
(1) prepared by carbonized woody fiber powder, and wood material is cleaned, peeling after removing impurity, drying, uses special-purpose machinery
Slice；The fines cut is sent into vacuum and takes out pressure carbonization tank, process 1 to 100 hour carbonization treatment makes fines moisture control
Between 0.1% to 10%；Fines after carbonization treatment enters flour mill and grinds to form carbonized woody fiber powder；
(2) mixing, by the carbonized woody fiber powder prepared and powdered wood plastic composite and fire-retardant fireproof powder,
According to the proportion mixing in claim 9, merging mixing tank is sealed stirring, until mixing is uniform；
(3) sub-material, mixing is evenly laid out in the container molding of several layers；
(4) hot-forming, the container molding Jing Guo sub-material is successively tired out and is folded in hot press, hot press is heated up to molding powder
100 DEG C to 320 DEG C of hot melting temperature, and with pressure extrusion 5 to 40 minutes of 3800 tons of highest；
(5) cold moudling, the powdered wood plastic composite after hot pressing in mixing melts and and carbonized woody fiber
Powder, fire protection flame retarding arogel stick together, and form blanket in container molding, later the container molding of Sheng Rong blanket 5 to
Cold press is built within 20 seconds to be greater than hot-forming hot press using the pressure of pressure 1/4 and carry out cold moudling to blanket；
(6) cold pressing sizing, carries out cold pressing sizing to the blanket after cold moudling；
(7) container is taken off, blanket and container molding are separated；
(8) it post-processes, to blanket according to dimension saw side, as carbonized solid wood is highly dense after then carrying out frosted, polishing treatment
Spend fiber composite plate；
(9) disposition recycling wood-plastic composite panel, the wood-plastic composite panel of recycling is cleaned, clean, dry after, carry out
Then pulverization process, grind into powder particle are fabricated to wood plastics composite to the technological process of production of (8) according to abovementioned steps (3)
Plate.
Present invention employs carbonized solid wood wood powders to be mixed with wood plastic composite and fire protection flame retarding powder with certain proportion, is passed through
The multiple working procedures such as hot pressing, cold pressing produce carbonized solid wood high-density fiber composite plate, utilize modified wood plastics composite of the invention
Material preparation wood-plastic composite panel bending resistance and flexural strength be substantially higher than wood-plastic board on the market, and have fire prevention, waterproof,
Insect prevention, anti-corrosion, it is fire-retardant the advantages that, while can be used for the decorative operations such as engraving, veneer, spray painting, and be free of formaldehyde, and energy
Enough complete recycling and reusings.
Modified wood plastic composite of the invention have intensity height, good toughness, recycle often, it is not oxidizable,
Not fugitive color, widely used.Wood plastic composite of the invention has anti-folding, intensity height, resistance to oxidation, can recycle, ring
It protects, many advantages, such as plasticity is strong, can be widely applied to the fields such as furniture, plate, the 3D printing material that production recycles.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail.
The present invention provides a kind of modified wood plastic composite, which includes by weight percentage
Following component: high density polyethylene (HDPE) 50~70%；Nylon plastic(s) powder 10~20%；Coloring agent 0~6%；Wood fiber powder 20~
30%.
Wherein, high density polyethylene (HDPE) (English name: High Density Polyethylene, abbreviation HDPE) melts
It is 130~200 DEG C at liquid required temperature, plasticity is strong, and gluing is strong；High density polyethylene (HDPE) is thermoplastic, belongs to ring
Material is protected, heating reaches fusing point, can recycling and reusing.
Nylon plastic(s) powder (i.e. polyamide, English name: Polyamide, abbreviation PA), being melted into liquid required temperature is
220~400 DEG C, toughness is extremely strong；Nylon is thermoplastic, belongs to environmental-protecting material, and heating reaches fusing point, i.e., recyclable sharp again
With.Nylon plastic(s) powder of the invention can be the plastic powders such as commercially available nylon 6 or nylon66 fiber.
Coloring agent can be commercially available color essence, can according to need and dye to plastics liquid, to meet different uses
Demand.
Wood fiber powder: can be the wood fiber powders such as commercially available bamboo powder, continuous high temperature and it is dry it is aerobic, without bright
Ignition temperature in the case where fire is 260~380 DEG C, wood fiber powder have many advantages, such as to inhale colloidality by force, good toughness.
The wood plastic composite of present embodiment uses high density polyethylene (HDPE) for primary raw material, then is subject to nylon plastic(s) and wood
The mixing of matter fiber powder, is added wood fiber powder, so that it is coated by high density polyethylene (HDPE) molten liquid completely, so that wood fiber powder
Hygroscopicity greatly reduces, and dispersibility, oxidative resistance and anti-flammability greatly improve, and then improve the intensity of wood plastic composite；
And the addition of nylon plastic(s), its intensity is further improved, the product oxidative resistance that is manufactured by the wood plastic composite,
The performances such as anti-folding, bending resistance are fabulous, can satisfy use demand.
The present invention also provides a kind of preparation methods of modified wood plastic composite, including above-mentioned wood and plastic composite
Material, the preparation method of above-mentioned wood plastic composite the following steps are included:
The thawing of S1, high density polyethylene (HDPE): high-speed mixer hot melt is added into flowing shape liquid in high density polyethylene (HDPE), is obtained
It is spare to molten plastic liquid.
In this step, the high-speed mixer of present embodiment is using on the market commonly for the high speed in plastic industry
Mixing machine, it is suitable for the mixings of the materials such as powder/particle/auxiliary agent/toner/color masterbatch/plastics.Staving uses circular arc type knot
Structure mainly makes material form circinate high-speed stirred and can heat modification using special vane structure.The height of present embodiment
The heating and temperature control of fast mixing machine is at 150~180 DEG C.
S2, dyeing: coloring agent is added in high-speed mixer, molten plastic liquid is dyed.
This step can be selected according to actual needs, needed dyeing that coloring agent is then added, do not needed, do not add.
S3, mixing: high-speed mixer is added in wood fiber powder, nylon plastic(s) powder, is mixed evenly, it is multiple to obtain wood moulding
Condensation material mixed liquor.
In this step, the order of addition of wood fiber powder and nylon plastic(s) powder are as follows: wood fiber powder is first added, stirs evenly
Afterwards, nylon plastic(s) powder is added.
S4, molding: mixed liquor is squeezed out into strips or graininess through extruding machine, spare.Extruding machine can also use city
Perhaps double helix plastic extruder can be processed mixed liquor into strips or particle common single-screw by the equipment on face
Shape material.
Can also include after step s4 step S5:
S5, grinding: strip wood plastic composite made from S4 is ground using grinder, obtains the wood moulding of granular
Composite material.
In this step, grinder can also be using common milling apparatus on the market, can be by graininess by the equipment
Material is processed into powdered.
It is first by high density polyethylene (HDPE) through at a temperature of 150~180 DEG C in wood plastic composite manufacturing process of the invention
It is persistently melted into the liquid of flow regime, coloring agent is then placed in and is dyed, then wood fiber powder is placed in vinyon
It is uniformly mixed in liquid, finally nylon plastic(s) powder powder is added.The preparation process of wood plastic composite of the invention is simple, raw material
It is few.
Since the temperature of preparation process is always held at 150~180 DEG C, high density polyethylene (HDPE) can be melted, but the temperature
The fusing point of degree and not up to nylon plastic(s), therefore, the nylon plastic(s) powder of addition will not melt, but be softened fusion in polyethylene
In the mixed liquor of wood fiber powder, three is after mixing, special with grinder etc. then after being extruded into strip of sheet by extruding machine
It is processed into granular by required specification with equipment, then is applied in practical application.
After wood fiber powder is added in molten plastic liquid, it can be wrapped by plastics liquid, be provided to wood fiber powder
Oxygen-free environment, wood fiber powder do not allow easy firing in this oxygen-free environment or become fragile, and both ensure that the ortho states of wood fiber powder,
The intensity of wood plastic composite can be enhanced again.
The present invention also provides a kind of wood-plastic composite panel prepared using above-mentioned wood plastic composite, wood-plastic composite panels
It is prepared using powdered wood plastic composite prepared by above-mentioned preparation method as raw material, wood-plastic composite panel includes with weight hundred
Divide the following component than meter:
Carbonized woody fiber powder, moisture content are to account for the 50% to 90% of total amount, granular size 5 between 0.1% to 10%
To between 600 mesh；
Powdered wood plastic composite accounts for the 10% to 60% of total amount, and granular size is between 0.5 to 700 mesh；
Fire protection flame retarding powder, accounts for total amount 1% to 10%.
Carbonized woody fiber powder takes to one or more of fast growing wood, Eucalyptus, poplar, pine, bamboo and wood；Timber takes
Material includes discarded leftover pieces, brush wood, wood shavings, the wooden chaff.
Fire protection flame retarding meal component is phosphate fireproof powder, aluminium phosphite fireproof powder, alumina powder, thermosetting plastics fireproof powder
Last one or more of them.
The production of above-mentioned wood-plastic composite panel, recovery process successively include.
(1) prepared by carbonized woody fiber powder, and wood material is cleaned, peeling removes impurity, is sliced with special-purpose machinery；It will
The fines cut is sent into vacuum and takes out pressure carbonization tank, and process 1 to 100 hour carbonization treatment makes fines moisture control 0.1%
To between 10%；Fines after carbonization treatment enters flour mill and grinds to form carbonized woody fiber powder.
(2) mixing, by the carbonized woody fiber powder prepared and powdered wood plastic composite and fire-retardant fireproof powder,
It is mixed according to proportion above-mentioned, merging mixing tank is sealed stirring, until mixing is uniform.
(3) sub-material, mixing is evenly laid out in the container molding of several layers；According to the specification of composite plate, highest can be with
There are 30 formable layer containers.
(4) hot-forming, the container molding Jing Guo sub-material is successively tired out and is folded in hot press, hot press is heated up to powdered
100 DEG C to 320 DEG C of wood plastic composite hot melting temperature, and with pressure extrusion 5 to 40 minutes of 3800 tons of highest, it is advised according to blanket
Lattice thickness is different, adjusts extrusion time.For example, 9mm blanket, hot pressing time are 8 minutes；12mm blanket, hot pressing time are 11 points
Clock；18mm blanket, hot pressing time are 18 minutes.
(5) cold moudling, the powdered wood plastic composite after hot pressing in mixing melts and and carbonized woody fiber
Powder, fire-retardant fireproof arogel stick together, and form blanket in container molding, later the container molding of Sheng Rong blanket 5 to
Cold press is built within 20 seconds to be greater than hot-forming hot press using the pressure of pressure 1/4 and carry out cold moudling to blanket；For example,
The pressure of step (4) hot press is 1000 tons, then the pressure of cold press should be 1250 tons.
(6) cold pressing sizing, carries out cold pressing sizing to the blanket after cold moudling.
In step (4), (5), (6), You Yitai hot press and several cold press continuous arrangements form operation flowing water
Line, several pieces of container molding is stacked while hot pressing or cold pressing by tired, so must be accurate to container molding in operation
Align centering；Used cold press needs cooling pipe-line system to ensure cooling effect, while according to blanket gauge thickness
Difference, quantity at least 2 of cold press on assembly line, if 8 to 10 cold presses are even arranged in flowing water wire length.
(7) container is taken off, blanket and container molding are separated.
(8) it post-processes, to blanket according to dimension saw side, as carbonized solid wood is highly dense after then carrying out frosted, polishing treatment
Spend fiber composite plate.
(9) disposition recycling wood-plastic composite panel, the wood-plastic composite panel of recycling is cleaned, clean, dry after, carry out
Pulverization process, grind into powder particle, then the technological process of production according to abovementioned steps (3) to (8), it is highly dense to be fabricated to carbonization
Spend wood-plastic composite panel.
It is mixed with certain proportion that present invention employs carbonized solid wood wood powders and powdered wood plastic composite and fire protection flame retarding powder
It closes, by multiple working procedures such as hot pressing, cold pressings, produces wood-plastic composite panel.The present invention is using the wooden fibre Jing Guo carbonization treatment
Tie up powder, the carbonized stock of high dehydration improved its character merged with plastics, simultaneously because carbide wood itself it is hydrophilic because
Son is recombinated, and the hygroscopicity equalization point of timber is reduced, and is commonly called as " wet line ", it is not easy to it is affected by the surrounding environment, so as to
Guarantee the quality of product.The wood-plastic composite panel bending resistance prepared using modified wood plastic composite of the invention and flexural strength
It is substantially higher than wood-plastic board on the market, and has many advantages, such as fire prevention, waterproof, insect prevention, anti-corrosion, fire-retardant, while can be used for carving
The decorative operations such as quarter, veneer, spray painting, and formaldehyde is free of, and being capable of complete recycling and reusing.
Embodiment 1
A kind of modified wood plastic composite, including following component by weight percentage:
High density polyethylene (HDPE) 60%；
Nylon plastic(s) powder 10%；
Bamboo and woods fiber powder 25%；
Coloring agent 5%.
The preparation method of wood plastic composite in embodiment 1, specifically includes the following steps:
Following components calculates by weight.
The thawing of S1, high density polyethylene (HDPE): high-speed mixer hot melt is added into flowing shape in 60% high density polyethylene (HDPE)
Liquid obtains molten plastic liquid, spare.The heating and temperature control of the high-speed mixer of present embodiment is at 150 DEG C or so.
S2, dyeing: 5% coloring agent is added in high-speed mixer, molten plastic liquid is dyed.
S3, mixing: 25% wood fiber powder is added in high-speed mixer, after being mixed evenly, then by 10%
Nylon plastic(s) powder be added in high-speed mixer, be mixed evenly, obtain wood plastic composite mixed liquor.
S4, molding: being extruded into graininess through extruding machine for above-mentioned mixed liquor, spare.
S5, grinding: graininess wood plastic composite made from S4 is ground using grinder, obtains powdered wood
Plastic composite materials.
Embodiment 2
A kind of modified wood plastic composite, including following component by weight percentage:
High density polyethylene (HDPE) 63%；
Nylon plastic(s) powder 12%；
Bamboo and woods fiber powder 20%；
Coloring agent 5%.
The preparation method of wood plastic composite in embodiment 2, specifically includes the following steps:
Following components calculates by weight.
The thawing of S1, high density polyethylene (HDPE): high-speed mixer hot melt is added into flowing shape in 63% high density polyethylene (HDPE)
Liquid obtains molten plastic liquid, spare.The heating and temperature control of the high-speed mixer of present embodiment is at 157 DEG C or so.
S2, dyeing: 5% coloring agent is added in high-speed mixer, molten plastic liquid is dyed.
S3, mixing: 20% wood fiber powder is added in high-speed mixer, after being mixed evenly, then by 12%
Nylon plastic(s) powder be added in high-speed mixer, be mixed evenly, obtain wood plastic composite mixed liquor.
S4, molding: being extruded into graininess through extruding machine for above-mentioned mixed liquor, spare.
S5, grinding: graininess wood plastic composite made from S4 is ground using grinder, obtains powdered wood
Plastic composite materials.
Embodiment 3
A kind of modified wood plastic composite, including following component by weight percentage:
High density polyethylene (HDPE) 58%；
Nylon plastic(s) powder 11%；
Bamboo and woods fiber powder 27%；
Coloring agent 4%.
The preparation method of wood plastic composite in embodiment 3, specifically includes the following steps:
Following components calculates by weight.
The thawing of S1, high density polyethylene (HDPE): high-speed mixer hot melt is added into flowing shape in 58% high density polyethylene (HDPE)
Liquid obtains molten plastic liquid, spare.The heating and temperature control of the high-speed mixer of present embodiment is at 170 DEG C or so.
S2, dyeing: 4% coloring agent is added in high-speed mixer, molten plastic liquid is dyed.
S3, mixing: 27% wood fiber powder is added in high-speed mixer, after being mixed evenly, then by 11%
Nylon plastic(s) powder be added in high-speed mixer, be mixed evenly, obtain wood plastic composite mixed liquor.
S4, molding: being extruded into graininess through extruding machine for above-mentioned mixed liquor, spare.
S5, grinding: graininess wood plastic composite made from S4 is ground using grinder, obtains powdered wood
Plastic composite materials.
Embodiment 4
A kind of modified wood plastic composite, including following component by weight percentage:
High density polyethylene (HDPE) 68%；
Nylon plastic(s) powder 11%；
Bamboo and woods fiber powder 20%；
Coloring agent 1%.
The preparation method of wood plastic composite in embodiment 4, specifically includes the following steps:
Following components calculates by weight.
The thawing of S1, high density polyethylene (HDPE): high-speed mixer hot melt is added into flowing shape in 68% high density polyethylene (HDPE)
Liquid obtains molten plastic liquid, spare.The heating and temperature control of the high-speed mixer of present embodiment is at 180 DEG C or so.
S2, dyeing: 1% coloring agent is added in high-speed mixer, molten plastic liquid is dyed.
S3, mixing: 20% wood fiber powder is added in high-speed mixer, after being mixed evenly, then by 11%
Nylon plastic(s) powder be added in high-speed mixer, be mixed evenly, obtain wood plastic composite mixed liquor.
S4, molding: being extruded into graininess through extruding machine for above-mentioned mixed liquor, spare.
S5, grinding: graininess wood plastic composite made from S4 is ground using grinder, obtains powdered wood
Plastic composite materials.
Embodiment 5
A kind of modified wood plastic composite, including following component by weight percentage:
High density polyethylene (HDPE) 50%；
Nylon plastic(s) powder 17%；
Bamboo and woods fiber powder 29%；
Coloring agent 4%.
The preparation method of wood plastic composite in embodiment 4, specifically includes the following steps:
Following components calculates by weight.
The thawing of S1, high density polyethylene (HDPE): high-speed mixer hot melt is added into flowing shape in 50% high density polyethylene (HDPE)
Liquid obtains molten plastic liquid, spare.The heating and temperature control of the high-speed mixer of present embodiment is at 168 DEG C or so.
S2, dyeing: 4% coloring agent is added in high-speed mixer, molten plastic liquid is dyed.
S3, mixing: 29% wood fiber powder is added in high-speed mixer, after being mixed evenly, then by 17%
Nylon plastic(s) powder be added in high-speed mixer, be mixed evenly, obtain wood plastic composite mixed liquor.
S4, molding: being extruded into graininess through extruding machine for above-mentioned mixed liquor, spare.
S5, grinding: graininess wood plastic composite made from S4 is ground using grinder, obtains powdered wood
Plastic composite materials.
Embodiment 6
It is that raw material prepares wood-plastic clad plate using the powdered wood plastic composite in Examples 1 to 5 in the present embodiment
Material, and corresponding performance test has been carried out to the wood-plastic composite panel after being made.
The preparation of wood-plastic composite panel in the present embodiment is carried out using the production technology of above-mentioned wood-plastic composite panel.
The present embodiment is respectively to the anti-of the wood-plastic composite panel prepared using the wood plastic composite of Examples 1 to 5 as raw material
Pressure performance and anti-bending strength have carried out corresponding experiment and measurement, testing procedure and test result is as follows:
1, test material:
The wood-plastic composite panel and commercially available wood-plastic clad plate prepared using the wood plastic composite of Examples 1 to 5 as raw material
Material is that test specimen is tested.The important technological parameters of test specimen see the table below 1.
1 wood-plastic composite panel major parameter of table
2, test method:
This test carries out the main mechanicals such as resistance to compression and bending resistance to wood-plastic board using AG-IS 250kN electronic tensile test machine
It can be carried out test.Resistance to compression and beam test respectively take 6 test specimens, and (1 commercially available wood-plastic board does control group, and the wood moulding of 5 embodiments is multiple
Plywood material does experimental group).Should ensure that before test all surface of test piece do not have visible crack, scratch or other may influence to test
As a result defect.
3, test result:
Test result is as follows table 2 and table 3:
Table 2: the mechanical property of test specimen 1
Table 3: the mechanical property of test specimen 2~6
By upper table 1~3 it is found that the compression strength and bending strength of wood-plastic composite panel on the market are all poor, using
It is easy to be broken off or be subject to crushing in the process, service life is short, is unable to satisfy use demand.And wood and plastic composite of the invention
The compression strength and bending strength of material are 5~10 times of commercially available wood plastic composite, the power such as anti-bending strength and compressive property
Function admirable is learned, is not easy to be broken off or be subject to crushing in actual use, long service life.
Wood plastic composite of the invention have intensity height, good toughness, recycle often, it is not oxidizable, be not easy to take off
It is color, widely used.Wood plastic composite of the invention has anti-folding, intensity height, resistance to oxidation, can recycle, is environmentally friendly, plastic
Property it is strong many advantages, such as, can be widely applied to the fields such as the production furniture, plate, the 3D printing material that recycle.
Above-described is only some embodiments of the present invention.For those of ordinary skill in the art, not
Under the premise of being detached from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
It encloses.
Claims (8)
1. the preparation method of modified wood plastic composite, which is characterized in that the wood plastic composite includes with weight percent
Than the following component of meter: high density polyethylene (HDPE) 50~70%, nylon plastic(s) powder 10~20%, coloring agent 0~6% and wood fibre
Powder 20~30%；
The preparation method of the wood plastic composite the following steps are included:
The thawing of S1, high density polyethylene (HDPE): high-speed mixer hot melt is added into flowing shape liquid in high density polyethylene (HDPE), is melted
Melt plastics liquid, it is spare；
S2, dyeing: coloring agent is added in high-speed mixer, molten plastic liquid is dyed；
S3, mixing: high-speed mixer is added in wood fiber powder, nylon plastic(s) powder, is mixed evenly, obtains wood and plastic composite
Expect mixed liquor；
S4, molding: mixed liquor is squeezed out into strips or graininess wood plastic composite through extruding machine, spare.
2. the preparation method of modified wood plastic composite according to claim 1, which is characterized in that the wood plastics composite
Material includes following component by weight percentage: high density polyethylene (HDPE) 50~60%, nylon plastic(s) powder 10~15% and wood
Matter fiber powder 20~25%, coloring agent 3~6%.
3. the preparation method of modified wood plastic composite according to claim 2, which is characterized in that the wood plastics composite
Material includes following component by weight percentage: high density polyethylene (HDPE) 60%, nylon plastic(s) powder 10% and wood fiber powder
25%, coloring agent 5%.
4. the preparation method of described in any item modified wood plastic composites according to claim 1~3, which is characterized in that
Further include step S5 after the step S4:
S5, grinding: graininess wood plastic composite made from step S4 is put into grinder and is ground, powdered wood is obtained
Plastic composite materials.
5. the preparation method of modified wood plastic composite according to claim 4, which is characterized in that in step sl,
The heating temperature of the high-speed mixer is 150~180 DEG C.
6. the preparation method of modified wood plastic composite according to claim 4, which is characterized in that in step s3,
The order of addition of the wood fiber powder and nylon plastic(s) powder are as follows: wood fiber powder is first added, after mixing evenly, adds nylon
Molding powder.
7. wood-plastic composite panel, which is characterized in that the wood-plastic composite panel is with powdered wood plastics composite as claimed in claim 4
Material is prepared by raw material, and the wood-plastic composite panel includes following component by weight percentage:
Carbonized woody fiber powder, moisture content are to account for the 50% to 90% of total amount between 0.1% to 10%；
Powdered wood plastic composite, accounts for the 10% to 60% of total amount；
Fire protection flame retarding powder, accounts for total amount 1% to 10%.
8. the production of wood-plastic composite panel as claimed in claim 7, recovery process, which is characterized in that the wood-plastic clad plate
The production of material, recovery process successively include:
(1) prepared by carbonized woody fiber powder: wood material is cleaned, peeling after removing impurity, drying, is sliced with special-purpose machinery；
The fines cut is sent into vacuum and takes out pressure carbonization tank, process 1 to 100 hour carbonization treatment makes fines moisture control exist
Between 0.1% to 10%；Fines after carbonization treatment enters flour mill and grinds to form carbonized woody fiber powder；
(2) mixing: by the carbonized woody fiber powder prepared and powdered wood plastic composite and fire-retardant fireproof powder, according to
Proportion mixing in claim 7, merging mixing tank is sealed stirring, until mixing is uniform；
(3) sub-material: mixing is evenly laid out in the container molding of several layers；
(4) hot-forming: the container molding Jing Guo sub-material successively being tired out and is folded in hot press, hot press is heated up to molding powder hot melt
100 DEG C to 320 DEG C of temperature, and with pressure extrusion 5 to 40 minutes of 3800 tons of highest；
(5) cold moudling: powdered wood plastic composite after hot pressing in mixing melt and with carbonized woody fiber powder, anti-
Fiery fireproof powder is glued together, and blanket is formed in container molding, and the container molding of Sheng Rong blanket is in 5 to 20 seconds later
Cold press is placed in be greater than hot-forming hot press using the pressure of pressure 1/4 and carry out cold moudling to blanket；
(6) cold pressing sizing cold pressing sizing: is carried out to the blanket after cold moudling；
(7) container is taken off: separation blanket and container molding；
(8) post-process: to blanket according to dimension saw side, as carbonized solid wood high density is fine after then carrying out frosted, polishing treatment
Tie up composite plate；
(9) disposition recycling wood-plastic composite panel: the wood-plastic composite panel of recycling is cleaned, clean, dry after, crushed
Then processing, grind into powder particle are fabricated to wood-plastic clad plate to the technological process of production of (8) according to abovementioned steps (3)
Material.
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