CN107418019A - A kind of imitative natural wood grain surface Wood-plastic material and its production method - Google Patents
A kind of imitative natural wood grain surface Wood-plastic material and its production method Download PDFInfo
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- CN107418019A CN107418019A CN201710257612.2A CN201710257612A CN107418019A CN 107418019 A CN107418019 A CN 107418019A CN 201710257612 A CN201710257612 A CN 201710257612A CN 107418019 A CN107418019 A CN 107418019A
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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
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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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
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to wood moulding production technical field, in particular discloses a kind of imitative natural wood grain surface Wood-plastic material and its production method.Present design with the addition of high density polyethylene (HDPE), maleic anhydride grafted polyethylene and maleic anhydride stem grafting polyolefin elasticity in the feed, with the addition of anti ultraviolet agent, antioxidant, antimildew and antibacterial agent and fluorescent color-developing agent again.Simultaneously by color masterbatch and processing technology, device conversion unit is chosen to install with reference to addition orifice fitting and runner.The present invention improves the compatibility between wood-fibred and plastics, enhances bending property, tensile property and the impact resistance of Wood-plastic material.Uvioresistant, oxidation resistance, while antimildew and antibacterial are added for Wood-plastic material, slow down the ageing process of Wood-plastic material.Obtained Wood-plastic material carries Wood Texture true to nature, and lines is more resistant, durable, closer in natural timber.There is fluorescent effect in the environment of dark, beautiful colourful decorative pattern can be presented, play the coloration warning effect in dark again.
Description
Technical field
The present invention relates to wood moulding production technical field, more particularly to a kind of imitative natural wood grain surface Wood-plastic material and its life
The design of production method.
Background technology
Wood-plastic material is a kind of a kind of Novel environment-friendlymaterial material just to grow up in recent years, has preferably elasticity；Using
Also it is quite extensive.However, Wood-plastic material also has the shortcomings that can not ignoring, most common problem is exactly heat resistance and UV resistant energy
Power is poor, and when long-time is under strong sunlight or crosses thermal environment, Wood-plastic material easily fades deformation, or even ftractures.While by
Raw material determines that Wood-plastic material quality is more crisp in itself, and toughness is inadequate, and impact resistance is not strong.And in the market non-co-extruded
For wood moulding mainly based on uniformly of the same colour, surface treatment often removes the peel wire drawing only with rubber polishing or steel brush, surface is formed slightly
Rustic woodiness touch, but lack the natural light and dark grain of wood, make surface tactile sensation not true to nature enough.On this basis, also there is life
Business men, using the metal disk roller for being carved with imitation wood line, under conditions of heating, goes to roll the wood after polishing to pursue wood grain effect
Surface is moulded, to obtain the imitation wood striped on wood moulding surface.But this mode has several drawbacks in that mainly decorative pattern is shallow, not scratch-resistant,
It is difficult to safeguard, sense of reality deficiency etc..
The content of the invention
The present invention is poor for anti-uv-ray in the prior art, the shortcomings that color pattern distortion, there is provided a kind of imitative day
Right wood grain surfaces Wood-plastic material and its production method.
It is poor that the present invention solves anti-uv-ray, and the problem of color pattern distortion, present design addition high density is gathered
Ethene, maleic anhydride grafted polyethylene and maleic anhydride stem grafting polyolefin elastomer come strengthen the bending strength of Wood-plastic material, draw
Intensity and impact strength are stretched, improves the impact resistance of Wood-plastic material, reduces cracking and problem on deformation during use
Produce, increase the service life.Anti ultraviolet agent, antioxidant and antimildew and antibacterial agent are with the addition of again to reduce ultraviolet and oxygen to wood moulding
The erosion and oxidation of material, while the wood-fibred in long-effective protection Wood-plastic material, avoid causing Wood-plastic material aging because it addles.
And by color masterbatch and processing technology, device is chosen to install with reference to addition orifice fitting and runner, so as to get Wood-plastic material color and flower
Line more true nature, sense of touch are more three-dimensional.Simultaneously by adding special modification fluorescence developing auxiliary agent in color masterbatch so that preparation
Beautiful colourful decorative pattern can be presented in wood-plastic products in the environment of dark, play the coloration warning effect under dim lights again.
Thus obtained Wood-plastic material not only serves as the light building material of imitative natural timber, more embodies its particularity function value.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals：
A kind of imitative natural wood grain surface Wood-plastic material, in terms of parts by weight, raw material includes basic wood moulding material 80-99.9
Part, color masterbatch 0.1-20 parts；Basic wood moulding materials stock includes polyethylene 25-50 parts, wood powder or other include the powder of string
Last 35-70 parts, lubricant 0.8-3 parts, maleic anhydride grafted polyethylene 1-5 parts, antioxidant 0.3-1 parts, anti ultraviolet agent 0.3-1
Part, antimildew and antibacterial agent 0.5-1 parts；Color masterbatch raw material includes the high density polyethylene (HDPE) 30-60 that molecular weight ranges are 40000-300000
Part, toner 5-40 parts, maleic anhydride stem grafting polyolefin elastomer 1-5 parts, nylon 5-30 parts, antioxidant 0.3-1 parts, anti ultraviolet agent
0.3-1 parts, antimildew and antibacterial agent 0.5-1 parts, fluorescent color-developing agent 1-20 parts.
Lubricant, which is used to reduce in material melts extrusion, melts pressure, improves mobility, obtains suitable material extrusion
Speed.Because substantial amounts of polar hydroxyl groups and phenolic hydroxyl group etc. are contained in wood-fibred surface, hydrophily is shown, and plastics are nonpolar
Hydrophobic substance, cause both interface binding powers small, poor compatibility.Add maleic anhydride grafted polyethylene improves as coupling agent
The problem of poor compatibility, increase the modulus of elasticity and bending property of Wood-plastic material.Anti ultraviolet agent and antioxidant can be effective
Ground reduces Wood-plastic material and is corroded and be oxidized by ultraviolet, effectively extends the service life of Wood-plastic material, slows down aging.It is mould proof anti-
Microbial inoculum long-acting can prevent that the wood-fibred in Wood-plastic material is rotten, effectively extend the service life of Wood-plastic material.Molecular weight ranges
It is relatively low for 40000-300000 high density polyethylene (HDPE) processing temperature, the charing of wood powder in process can be effectively avoided, it is high
Density polyethylene Chain Flexibility is good, and deformability is strong, can effectively improve the impact resistance and bending strength of Wood-plastic material.
The polyethylene that color masterbatch is selected, melting means is smaller than the polyethylene melting means of basic wood moulding material, and molecular weight is big, relatively difficult
Melt；The nylon of introduction is higher than polyethylene fusing point so that in wood moulding moulding process, to make full use of two kinds of material system fusing points
With difference of flowability so that color masterbatch develops the color naturally according to certain track.But to take into account simultaneously compatible between nylon and polyethylene
Property, introduce maleic anhydride stem grafting polyolefin elastomer and be used as bridge so that i.e. because fusing point and poor fluidity between two-phase interface
It is different and demarcate, but certain compatibility avoids between interface that boundary is obvious each other, forms a transitional region so that hook color effect
It is softer, natural.The addition of other maleic anhydride stem grafting polyolefin elastomer can improve Wood-plastic material tensile strength, bending
Intensity and impact strength, the cracking and metaboly occurred during use is effectively reduced, is increased the service life.
Preferably, basic wood moulding materials stock also includes the filler no more than 20 parts, the pigment no more than 5 parts；Color
Female raw material also includes the wood powder or other powder for including string no more than 50 parts, the filler no more than 20 parts；Wherein
Filler is talcum powder or calcium carbonate or micarex or wollastonite.The materials such as talcum powder all have lubricity, anti-stick, help stream, melt
The excellent properties such as point is high, covering power good, softness, good luster, strong adsorption force, it is cost-effective to be suitable as filler, simultaneously
The intensity of material can be improved to a certain extent.
Wherein, a kind of method for preparing above-mentioned imitative natural wood grain surface Wood-plastic material, comprises the following steps：
The first step, by polyethylene, wood powder or other include the powder of string, filler, lubricant, maleic anhydride connects
Branch polyethylene, antioxidant, anti ultraviolet agent, antimildew and antibacterial agent, pigment obtain wood after sufficiently mixing, by comminutor melt pelletization
Mould base material.
Second step, by high density polyethylene (HDPE), wood powder or other include the powder of string, filler, toner, maleic acid
Acid anhydride grafted polyolefin olefin elastomer, nylon, antioxidant, anti ultraviolet agent, antimildew and antibacterial agent, fluorescent color-developing agent after sufficiently mixing, lead to
Cross comminutor melt pelletization and obtain color masterbatch.
3rd step, between extruder and mould being provided with runner chooses to install device, is chosen to install in runner between device and mould
Orifice fitting is installed.
4th step, extruder hopper, or only basic wood moulding are added after basic wood moulding material and color masterbatch are sufficiently mixed
Material adds extruder hopper, and color masterbatch adds extruder by the way of the feeding of side；Pass through extruder and mould extrusion molding.
It is easy especially plus during powder because multiple material heap density is different when raw material is added into extruder by hopper
Layering, the component for easily causing finished product are uneven.It can now be added by the way of laterally feeding from material melts section former
Material, raw material one enter extruder barrel and are by molten material parcel, mix, avoid the abrasion of screw rod and machine barrel, more subtract
Lack the energy dissipation caused by friction, be effectively improved yield and production efficiency, reduce production cost.
Preferably, also including the 5th step, the section bar that mould comes out extrudes decorative pattern by heat pressing process, through cooling down, cutting,
Roller brush is recycled to polish Surface of profile.Surface of profile is embossed by the 5th step and grinding process, Neng Gou
Wood-plastic material surface extrudes decorative pattern so that finished product is more attractive in appearance.Bruting process is polished or thrown to freshly extruded Surface of profile
Light so that dumb light or light effect is presented in Surface of profile, meets different use demands, while removal can in extrusion
The burr that can be formed.
Preferably, orifice fitting is platy structure, there are some through holes in plate face.The key point of the device is porous knot
Structure so that when hook color color masterbatch passes through each aperture, because frictional force and tangential force, pigment figure reason will be hooked and fill track row according to straight line
Enter.
Preferably, runner, which chooses to install, material flow passage in device, material flow passage chooses to install device axle center around runner
Spiral rotating；Or the axle center of material flow passage and runner choose to install the axis parallel of device, material flow passage stage casing is to axle
The heart is recessed；The ratio of inlet absolute pressure (IAP) and outlet absolute pressure when material flows through passage is 1.2-4.The device acts on
In the decorative pattern for linearly to have advanced, under buffer brake reflux and the collective effect of revolving force, advanced with " S " type track,
So that hooking pigment figure reason closer to natural wood grain, it is more naturally true to nature to hook color wood grain.Natural wood grain, it is often each to irregular
, and the striped of overall whereabouts straight line, and runner chooses to install the purpose of device exactly allows fluid-mixing, by spiral rotating, or
It is local to change flow direction, the complete straight line moving route of fluid can be broken.Therefore, the strict knot of the device neither one
Structure, upset fluid straight ahead track simply by unordered, to reach relatively natural unordered wood grain effect.
Preferably, heat pressing process is using the Metal Contact Rollers for being carved with natural wood grain, it is right under 50-200 DEG C of heating-up temperature
Material carries out decorative pattern compacting.Just go out the hook color wood-plastic board of mould, because waste heat not yet cools down, material is in half soft state, this
When using the Metal Contact Rollers for being carved with special wood grain, under 50-200 DEG C of heating-up temperature, use certain pressure compacting decorative pattern so that half
Softer material is preferably full of in flower rod surface metal texture gap, and the ridge design lines of compacting are mellow and full, and texture is deep, and lines is more
There is third dimension；Cool down immediately again, accelerate surface skining so that decorative pattern has more preferable case hardness, strengthens wear-resisting.
Preferably, have in the roller brush that polishing uses doped with diamond dust, a diameter of 1-3mm nylon strand.It is soft
Soft nylon avoids the damage of decorative pattern, and wet look is polished into matte effect by hard, fine and closely woven diamond dust so that finished surface
With more natural woodiness touch.
Preferably, when preparing color masterbatch, the plasticization temperature of comminutor is 130-220 DEG C；When preparing wood moulding base material, make
The plasticization temperature of grain machine is 150-260 DEG C.At this temperature, both retention properties is stable for the particle of preparation, and easily shaping, does not send out
Raw adhesion.
Preferably, when section bar extrusion is molded, extruder temperature is 130-240 DEG C, and mold temperature is 130-180 DEG C.Herein
At a temperature of, hot pressing is carried out in time beneficial to the section bar of extrusion, ensure that the definition and depth of the decorative pattern of compacting, while avoids material
Material is after extruder is left with regard to softening transform.
The present invention has significant technique effect as a result of above technical scheme：Improve wood-fibred and plastics it
Between compatibility, enhance bending property, tensile property and the impact resistance of Wood-plastic material, reducing Wood-plastic material makes
Fracture and problem on deformation during.Uvioresistant, oxidation resistance are added for Wood-plastic material, while mould proof can be resisted
Bacterium, the ageing process of Wood-plastic material is slow down, is increased the service life.Wood-plastic material lines becomes apparent from, naturally, lines are soft,
Texture is deeper, realizes Wood Texture effect true to nature, and lines is more resistant, durable.Clear, magnificent dumb light is presented in material surface
Texture, closer in natural timber.There is fluorescent effect in the environment of dark, beautiful colourful decorative pattern can be presented, play again
Coloration warning effect under dim lights.
Brief description of the drawings
Fig. 1 is the production line schematic diagram of the embodiment of the present invention 1.
Fig. 2 is that the runner of the embodiment of the present invention 1 chooses to install schematic device.
Fig. 3 is the orifice fitting schematic diagram of the embodiment of the present invention 1.
Fig. 4 is the change curve that high density polyethylene (HDPE) content influences on wood moulding modulus of elasticity.
Fig. 5 is the change curve that high density polyethylene (HDPE) content influences on wood moulding bending strength.
Fig. 6 is that the runner of the embodiment of the present invention 2 chooses to install schematic device.
Fig. 7 is the orifice fitting schematic diagram of the embodiment of the present invention 2.
Fig. 8 is the change curve that maleic anhydride grafted polyethylene content influences on wood moulding bending strength.
Fig. 9 is the change curve that maleic anhydride grafted polyethylene content influences on wood moulding tensile strength.
Figure 10 is the change curve that maleic anhydride grafted polyethylene content influences on wood moulding impact strength.
Figure 11 is that the runner of the embodiment of the present invention 3 chooses to install schematic device
Figure 12 is maleic anhydride stem grafting polyolefin elastomer content to wood moulding bending strength influence curve figure.
Figure 13 is maleic anhydride stem grafting polyolefin elastomer content to wood moulding tensile strength influence curve figure.
Figure 14 is maleic anhydride stem grafting polyolefin elastomer content to wood moulding impact strength influence curve figure.
The toponym that each number designation is referred in the figures above is as follows：Wherein, 1-runner chooses to install device, 2-orifice plate
Device.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in figure 1, a kind of imitative natural wood grain surface Wood-plastic material production method, first, in terms of parts by weight, by poly- second
40 parts of alkene, 40 parts of wood powder, 10 parts of filler, 3 parts of lubricant, 1 part of maleic anhydride grafted polyethylene, 1 part of antioxidant, anti ultraviolet agent
1 part, 1 part of antimildew and antibacterial agent, 3 parts of pigment obtains wood moulding base material after sufficiently mixing, by comminutor melt pelletization, is granulated
The plasticization temperature of machine is 150-260 DEG C.
Then, in terms of parts by weight, by 40 parts of high density polyethylene (HDPE), 40 parts of wood powder, 5 parts of filler, 3 parts of toner, Malaysia
2 parts of acid anhydride-grafted polyolefin elastomer, 4 parts of nylon, 1 part of antioxidant, 1 part of anti ultraviolet agent, 1 part of antimildew and antibacterial agent, fluorescence developing
3 parts of agent obtains color masterbatch after sufficiently mixing, by comminutor melt pelletization, and the plasticization temperature of comminutor is 175 DEG C.Prepare wood moulding
The comminutor used when base material and color masterbatch material is parallel equidirectional two-screw comminutor.
Followed by, between extruder and mould being provided with runner chooses to install device 1, runner choose to install device 1 and mould it
Between orifice fitting 2 is installed.
Then, in terms of parts by weight, basic 95 parts of wood moulding material, 5 parts of color masterbatch are taken；Basic wood moulding material and color masterbatch is abundant
Extruder hopper is added after mixing and passes through extruder and mould extrusion molding；When section bar extrusion is molded, extruder temperature is 185 DEG C,
Mold temperature is 155 DEG C.The extruder used during extrusion molding is taper counter rotation twin screw extruder.
Finally, decorative pattern is extruded by heat pressing process from the Wood-plastic material of mould extrusion, through cooling down, cutting, recycles roller
Brush is polished Surface of profile.Heat pressing process is right under 125 DEG C of heating-up temperature using the Metal Contact Rollers for being carved with natural wood grain
Section bar carries out decorative pattern compacting.Have in the roller brush used of polishing doped with diamond dust, the nylon yarn that a diameter of 1-3mm is not waited
Bar.
As shown in Fig. 2 dotted line represents perspective partial, runner, which chooses to install, material flow passage in device 1, passage axle center and stream
Road chooses to install the axis parallel of device 1, and passage stage casing is recessed to axle center；Inlet absolute pressure (IAP) and outlet when material flows through passage is absolute
The ratio of pressure is 3.The effect of the device is the decorative pattern so that linearly advancing, in buffer brake reflux and revolving force
Under collective effect, advanced with " S " type track so that hook pigment figure reason closer to natural wood grain, hook color wood grain more naturally, true to nature.
Natural wood grain, it is often each to irregular, and the striped of overall whereabouts straight line, and runner chooses to install the purpose of device, is exactly
Allow fluid-mixing, pass through spiral rotating, or the local complete straight line moving route for changing flow direction, fluid being broken.
Therefore, the strict structure of the device neither one, upset fluid straight ahead track simply by unordered, connect with reaching to compare
Nearly natural unordered wood grain effect.
As shown in figure 3, orifice fitting 2 is platy structure, there are some through holes in plate face.Shape of through holes is circle in the embodiment
Shape, the key point of the device are loose structure so that when hook color color masterbatch passes through each aperture, because frictional force and tangential force,
Pigment figure reason will be hooked to advance according to straight line dress track.
As shown in figure 4, the content of raw material medium high density polyethylene is different, resulting Wood-plastic material performance is also different.With
The increase of high density polyethylene (HDPE) content, resulting Wood-plastic material modulus of elasticity also increases therewith, in high density polyethylene (HDPE) content
When between 20%-40%, the preferable Wood-plastic material of modulus of elasticity can be obtained.Content more than 40% after modulus of elasticity again can under
Drop.The present embodiment medium high density polyethylene content accounts for the 40% of raw material gross weight, and resulting Wood-plastic material possesses preferable bullet
Property modulus.The formula can effectively reduce Wood-plastic material due to long-term use of or the problem of firmly shock is deformed.
As shown in figure 5, with the increase of high density polyethylene (HDPE) content, resulting Wood-plastic material bending strength also increases therewith
Greatly, when high density polyethylene (HDPE) content is 40%, optimal bending strength can be obtained.Content more than 40% after bending strength just
It can decline.The present embodiment medium high density polyethylene content accounts for the 40% of raw material gross weight, and resulting Wood-plastic material possesses most preferably
Bending strength.The formula can increase the intensity of Wood-plastic material, reduce Wood-plastic material due to long-term use of or firmly shock
Produce the situation of fracture.
Embodiment 2
A kind of imitative natural wood grain surface Wood-plastic material in the present embodiment, in terms of parts by weight, raw material includes basic wood moulding
95 parts of material, 5 parts of color masterbatch；Basic wood moulding materials stock includes 40 parts of polyethylene, 40 parts of wood powder, 3 parts of lubricant, filler 10
Part, 3 parts of pigment, 5 parts of maleic anhydride grafted polyethylene, 1 part of antioxidant, 1 part of anti ultraviolet agent, 1 part of antimildew and antibacterial agent；Color masterbatch raw material
Including 40 parts of the high density polyethylene (HDPE) that molecular weight ranges are 40000-300000,40 parts of wood powder, 5 parts of filler, 3 parts of toner, horse
Maleic anhydride grafted 2 parts of polyolefin elastomer, 4 parts of nylon, 1 part of antioxidant, 1 part of anti ultraviolet agent, 1 part of antimildew and antibacterial agent, fluorescence shows
3 parts of toner.
As shown in fig. 6, dotted line represents perspective partial, runner, which chooses to install, material flow passage in device 1, leads in the present embodiment
Road chooses to install the axle center spiral rotating of device 1 around runner；The ratio of inlet absolute pressure (IAP) and outlet absolute pressure when material flows through passage
It is worth for 3.The effect of the device is the decorative pattern so that linearly advancing, in buffer brake reflux and the collective effect of revolving force
Under, advanced with " S " type track so that hook pigment figure reason closer to natural wood grain, hook color wood grain more naturally, true to nature.
As shown in fig. 7, orifice fitting 2 is platy structure, there are some through holes in plate face.Shape of through holes is square in the embodiment
Shape, the key point of the device are loose structure so that when hook color color masterbatch passes through each aperture, because frictional force and tangential force,
Pigment figure reason will be hooked to advance according to straight line dress track.
As shown in figure 8, after addition maleic anhydride grafted polyethylene, the bending strength of product dramatically increases, when content arrives
During up to 5%, the bending strength of Wood-plastic material reaches maximum, curved compared to the Wood-plastic material for being not added with maleic anhydride grafted polyethylene
Qu Qiangdu about improves 68%.When content reaches 8%, bending strength about improves 60%.That is, with Malaysia
The increase of anhydride grafted lldpe content, the bending strength of Wood-plastic material, which is presented, first strengthens the trend weakened afterwards.It is because high
Density polyethylene is non-polar polymer, their poor compatibilities between wood powder, when its directly with the compound preparation wood moulding of wood powder
During material, the performance of material is relatively low.After polarity anhydride group is introduced, it forms ester bond between the hydroxyl of wood powder.But work as
During maleic anhydride grafted polyethylene content increase, the Interaction enhanced between polarity anhydride group, wood powder and matrix can be influenceed
Interface cohesion, thus cause hydraulic performance decline.
In the present embodiment, maleic anhydride grafted polyethylene content is about 5%, and now Wood-plastic material has optimal bending strong
Degree, can effectively reduce Wood-plastic material in use caused cracking and deformation the problem of, slow down material aging, extension makes
Use the life-span.
As shown in figure 9, when being not added with maleic anhydride grafted polyethylene, the tensile strength of Wood-plastic material is relatively low, works as maleic acid
When acid anhydride grafted polyethylene content reaches 5%, Wood-plastic material has maximum tensile strength, about than being not added with when add
56%, but when content reaches 8%, tensile strength drastically declines.With the increase of maleic anhydride grafted polyethylene content, wood
The tensile strength of moulding material, which is presented, first strengthens the trend weakened afterwards.In the present embodiment, the content of maleic anhydride grafted polyethylene is about
For 5%, now Wood-plastic material has optimal tensile strength, can effectively reduce that Wood-plastic material is caused in use to be opened
The problem of splitting and deforming, slows down material aging, increases the service life.
As shown in Figure 10, when the maleic anhydride grafted polyethylene content of addition is 5%, compared to wood moulding material when being not added with
Material impact strength has increased about 13%, obtains the impact strength of maximum.When content is 8%, the impact strength of Wood-plastic material
Compared to increase only 4% when being not added with.With the increase of maleic anhydride grafted polyethylene content, the impact strength of Wood-plastic material is in
Now first strengthen the trend weakened afterwards.In the present embodiment, the content of maleic anhydride grafted polyethylene is about 5%, now wood moulding material
Material has optimal impact strength, can effectively improve Wood-plastic material impact resistance in use, effectively extends and uses
Life-span.
Remaining is all same as Example 1.
Embodiment 3
A kind of imitative natural wood grain surface Wood-plastic material in the present embodiment, in terms of parts by weight, raw material includes basic wood moulding
95 parts of material, 5 parts of color masterbatch；Basic wood moulding materials stock includes 40 parts of polyethylene, 40 parts of wood powder, 3 parts of lubricant, filler 10
Part, 3 parts of pigment, 5 parts of maleic anhydride grafted polyethylene, 1 part of antioxidant, 1 part of anti ultraviolet agent, 1 part of antimildew and antibacterial agent；Color masterbatch raw material
Including 40 parts of the high density polyethylene (HDPE) that molecular weight ranges are 40000-300000,40 parts of wood powder, 5 parts of filler, 3 parts of toner, horse
Maleic anhydride grafted 5 parts of polyolefin elastomer, 2 parts of nylon, 1 part of antioxidant, 1 part of anti ultraviolet agent, 1 part of antimildew and antibacterial agent, fluorescence shows
2 parts of toner.
As shown in figure 11, dotted line represents perspective partial, and runner, which is chosen to install in device 1, material flow passage, and passage is around runner
Choose to install the axle center spiral rotating of device 1；The ratio of inlet absolute pressure (IAP) and outlet absolute pressure when material flows through passage is 3.This
The runner of embodiment chooses to install device 1 compared with embodiment 2, and the distance between material flow passage is bigger.The effect of the device
It is the decorative pattern so that linearly advancing, under buffer brake reflux and the collective effect of revolving force, with " S " type track row
Enter so that hook pigment figure reason closer to natural wood grain, hook color wood grain more naturally, true to nature.
As shown in figure 12, maleic anhydride stem grafting polyolefin elastomer content has larger shadow to Wood-plastic material bending property
Ring, Wood-plastic material bending strength becomes with what the increase of maleic anhydride stem grafting polyolefin elastomer content declined afterwards in first rising
Gesture.The raising of bending strength is due to that maleic anhydride stem grafting polyolefin elastomer improves wood powder and organic matter basal body interface is compatible
Property reason, it is due to then maleic anhydride stem grafting polyolefin elastomer bending strength itself far below height that bending strength, which declines, thereafter
Density polyethylene, and its toughening effect also make it that Wood-plastic material is being that caused Bending Deformation carries significantly by bending stress
It is high.When maleic anhydride stem grafting polyolefin elastomer content is about 6%, the bending strength of Wood-plastic material reaches maximum, compares
About 47% is added when being not added with.In the present embodiment, maleic anhydride stem grafting polyolefin elastomer content is about 5%, now wooden
Moulding material has preferable bending strength, effectively reduces the generation of Wood-plastic material deformation in use, effectively extends wood moulding
The service life of material.
As shown in figure 13, maleic anhydride stem grafting polyolefin elastomer has humidification to Wood-plastic material tensile strength, and this is
Because maleic anhydride stem grafting polyolefin elastomer band polarized group maleic anhydride, maleic anhydride can be sent out with the hydroxyl in wood powder
Raw esterification generation chemical bond, and elastomer can interact with high density polyethylene (HDPE), so as to improve between material
Interface compatibility, make Wood-plastic material tensile strength improve.Simultaneously as polyolefin elastomer processing fluidity is fine, therefore
Dispersiveness in high density polyethylene (HDPE) very well, interacts strongly with highdensity.Wood-plastic material tensile strength with
The increase of maleic anhydride stem grafting polyolefin elastomer content is in downward trend after first rising.When maleic anhydride stem grafting polyolefin bullet
When elastomer content is 6%, Wood-plastic material tensile strength reaches maximum, compared to improving 91% when being not added with, tensile strength thereafter
Begun to decline with the increase of content.In the present embodiment, maleic anhydride stem grafting polyolefin elastomer content is about 5%, now
Wood-plastic material has preferable tensile strength, effectively solves the problems, such as Wood-plastic material deformation and cracking in use, effectively extends
The service life of Wood-plastic material.
As shown in figure 14, Wood-plastic material impact strength is as Wood-plastic material bending property is with maleic anhydride stem grafting polyolefin
Elastomer content increases and gradually increased.The raising of impact strength can and crazing branched theory theoretical by crazing-shear band
To explain, after adding elastomer in plastics, when material is by impact stress, elastomer particles, which can fill, to be done in stress concentration
The heart, a large amount of crazings and shear band are induced, and make crazing branched.Meanwhile the presence of elastomer particles can control the development of crazing
And crazing is terminated in time and destructive crackle will not be developed into.The generation and development of crazing and shear band will be consumed largely
Impact energy, and then increase substantially its impact strength.When maleic anhydride stem grafting polyolefin elastomer content is 10%, compare
Impact strength improves about 236% when being not added with.In the present embodiment, maleic anhydride stem grafting polyolefin elastomer content is about
5%, now impact strength compared to be not added with when improve about 76%, effectively enhance the impact resistance of Wood-plastic material, prolong
Long life.
Remaining is all same as Example 1.
Embodiment 4
A kind of imitative natural wood grain surface Wood-plastic material, in terms of parts by weight, raw material includes basic wood moulding material 80-99.9
Part, color masterbatch 0.1-20 parts；Wherein basic wood moulding raw material does not include filler.Remaining is all same as Example 1.
Embodiment 5
A kind of imitative natural wood grain surface Wood-plastic material, in terms of parts by weight, raw material includes basic wood moulding material 80-99.9
Part, color masterbatch 0.1-20 parts；Wherein color masterbatch raw material does not include filler.Remaining is all same as Example 1.
Embodiment 6
A kind of imitative natural wood grain surface Wood-plastic material, in terms of parts by weight, raw material includes basic wood moulding material 80-99.9
Part, color masterbatch 0.1-20 parts；Wherein color masterbatch raw material does not include wood powder or other powder for including string.Remaining all with embodiment
1 is identical.
In a word, presently preferred embodiments of the present invention, all equalizations made according to scope of the present invention patent be the foregoing is only
Change and modification, it should all belong to the covering scope of patent of the present invention.
Claims (10)
- A kind of 1. imitative natural wood grain surface Wood-plastic material, it is characterised in that：In terms of parts by weight, raw material includes basic wood moulding material 80-99.9 part, color masterbatch 0.1-20 parts；Basic wood moulding materials stock includes polyethylene 25-50 parts, wood powder or other to include plant fine Powder 35-70 parts of dimension, lubricant 0.8-3 parts, maleic anhydride grafted polyethylene 1-5 parts, antioxidant 0.3-1 parts, anti ultraviolet agent 0.3-1 parts, antimildew and antibacterial agent 0.5-1 parts；Color masterbatch raw material includes the high density polyethylene (HDPE) that molecular weight ranges are 40000-300000 30-60 parts, toner 5-40 parts, maleic anhydride stem grafting polyolefin elastomer 1-5 parts, nylon 5-30 parts, antioxidant 0.3-1 parts, resist Ultraviolet dose of 0.3-1 part, antimildew and antibacterial agent 0.5-1 parts, fluorescent color-developing agent 1-20 parts.
- A kind of 2. imitative natural wood grain surface Wood-plastic material according to claim 2, it is characterised in that：Basic wood moulding material is former Material also includes the filler no more than 20 parts, the pigment no more than 5 parts；Color masterbatch raw material also include no more than 50 parts wood powder or its He includes the powder of string, the filler no more than 20 parts；Wherein filler be talcum powder or calcium carbonate or micarex or Wollastonite.
- A kind of 3. method of the imitative natural wood grain surface Wood-plastic material produced described in claim 2, it is characterised in that including following Step：From basic wood moulding materials stock and color masterbatch raw material for standby,The first step, portion rate according to claim 2, by polyethylene, wood powder or other include the powder of string, fill out Fill thing, lubricant, maleic anhydride grafted polyethylene, antioxidant, anti ultraviolet agent, antimildew and antibacterial agent, pigment after sufficiently mixing, leads to Cross comminutor melt pelletization and obtain wood moulding base material；Second step, portion rate according to claim 2, by high density polyethylene (HDPE), wood powder or other include string Powder, filler, toner, maleic anhydride stem grafting polyolefin elastomer, nylon, antioxidant, anti ultraviolet agent, antimildew and antibacterial agent are glimmering Light developer obtains color masterbatch after sufficiently mixing, by comminutor melt pelletization；3rd step, runner is installed between extruder and mould and chooses to install device (1), runner choose to install device (1) and mould it Between orifice fitting (2) is installed；4th step, extruder hopper, or only basic wood moulding material are added after basic wood moulding material and color masterbatch are sufficiently mixed Extruder hopper is added, color masterbatch adds extruder by the way of the feeding of side, passes through extruder and mould extrusion molding.
- A kind of 4. method for producing imitative natural wood grain surface Wood-plastic material according to claim 3, it is characterised in that：Also wrap The 5th step is included, the section bar that mould comes out extrudes decorative pattern by heat pressing process, through cooling down, cutting, recycles roller brush to section bar table Polished in face.
- A kind of 5. method for producing imitative natural wood grain surface Wood-plastic material according to claim 3, it is characterised in that：Orifice plate Device (2) is platy structure, has some through holes in plate face.
- A kind of 6. method for producing imitative natural wood grain surface Wood-plastic material according to claim 3, it is characterised in that：Runner Choosing to install in device (1) has material flow passage, and material flow passage chooses to install device (1) axle center spiral rotating around runner；Or thing Expect that the axle center of flow channel and runner choose to install the axis parallel of device (1), material flow passage stage casing is recessed to axle center；Material flow It is 1.2-4 through inlet absolute pressure (IAP) during passage and the ratio of outlet absolute pressure.
- A kind of 7. method for producing imitative natural wood grain surface Wood-plastic material according to claim 4, it is characterised in that：Hot pressing Technique carries out decorative pattern compacting under 50-200 DEG C of heating-up temperature using the Metal Contact Rollers for being carved with natural wood grain to material.
- A kind of 8. method for producing imitative natural wood grain surface Wood-plastic material according to claim 4, it is characterised in that：Polishing Have in the roller brush of use doped with diamond dust, a diameter of 1-3mm nylon strand.
- A kind of 9. method for preparing the imitative natural wood grain surface Wood-plastic material of production according to claim 3, it is characterised in that： When preparing color masterbatch, the plasticization temperature of comminutor is 130-220 DEG C；When preparing wood moulding base material, the plasticization temperature of comminutor is 150-260℃。
- A kind of 10. method for producing imitative natural wood grain surface Wood-plastic material according to claim 3, it is characterised in that：Type During material extrusion molding, extruder temperature is 130-240 DEG C, and mold temperature is 130-180 DEG C.
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| EP3904447A1 (en) * | 2020-04-30 | 2021-11-03 | Zouping Damei Rubber And Plastic Technology Co., Ltd. | A multi-color wood-plastic molded material, a process for producing the same and a wood-plastic composite board |
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