CN104130529B - A kind of high rigid, low density PVC wood plastic foamed board and preparation method thereof - Google Patents
A kind of high rigid, low density PVC wood plastic foamed board and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to Wood-plastic material field, be specially a kind of high rigid, low density PVC wood plastic foamed board and preparation method thereof, the Wood-plastic foam plate rigidity solving to exist in prior art is relatively low, heat distortion temperature is on the low side and affects the problems such as its range of application。Physical method is adopted to carry out the novel wood-plastic intermingling material of macromolecular material, this sheet material is with polrvinyl chloride for material of main part, with the organic material such as wood powder, bamboo powder and other inorganic material for filler, and add various auxiliary agent, adopt extrusion foaming explained hereafter to go out Wood-plastic foam sheet material。This timber intensity height, light weight, waterproof, beautiful appearance and environment-protecting asepsis, overcome when conventional polyvinyl chloride foamed plate uses and need surface lacquer, operates inconvenience and causes the disadvantage of environmental pollution。PVC wood plastic foaming plate of the present invention has high rigidity (i.e. the modulus of elasticity in static bending close to timber), (density is at 0.45～0.75g/cm for low-density3), the feature such as thermostability higher (heat distortion temperature >=80 DEG C)。
Description
Technical field
The present invention relates to Wood-plastic material field, be specially a kind of high rigid, low density PVC wood plastic foamed board and preparation method thereof。
Background technology
Wood-plastic material is the discarded wood fiber of a kind of use and Plant fiber and thermoplastic etc. are filled with, strengthen, modifiy, blended advanced composite material (ACM) prepared afterwards。This mixed and modified material mixes corresponding mould and assistant formation machine again through special single screw extrusion machine or double; two spiral shell machine extruder, can be processed into section bar, sheet material or other goods。
The foaming plate prepared with polrvinyl chloride (PVC) is mainly used in the manufacture of advertisement cabinet, bathroom cabinet, and the earliest from Europe introducing equipment and technology, the product standard quoted also is the standard with reference to Europe, and the density of sheet material is bigger。Polrvinyl chloride is the universal thermoplastic of a kind of function admirable, is one of maximum plastics variety of China's yield, and the processing forming of polrvinyl chloride is very poor, it is necessary to add various processing aid, to improve its processing characteristics。In recent years along with the development of the development of equipment especially auxiliary agent, the density of sheet material is greatly lowered, and it is trend of the times that PVC wood plastic foamed board substitutes timber use。But, current Wood-plastic foam plate disadvantage is: rigidity (i.e. the modulus of elasticity in static bending) is not as timber, and heat distortion temperature is on the low side, has had a strong impact on its range of application。
Summary of the invention
It is an object of the invention to provide a kind of high rigid, low density PVC wood plastic foamed board and preparation method thereof, the Wood-plastic foam plate rigidity solving to exist in prior art is relatively low, heat distortion temperature is on the low side and affects the problems such as its range of application。
The technical scheme is that
A kind of high rigid, low density PVC wood plastic foamed board, counts by weight, and this foamed board formula is composed as follows:
Polyvinyl chloride resin 100 parts；PVC foam 20～40 parts of pulverizing material of regeneration；MS resin 5～25 parts；Wollastonite fibre 10～50 parts；Precipitated calcium carbonate 5～25 parts；Ground calcium carbonate 5～30 parts；Wood powder 10～30 parts；PVC complex stabilizer 4～8 parts；PVC in-lubricant 0.5～2.0 part；PVC external lubricant 0.5～1.5 part；AC foaming agent 0.5～2.0 part；NC foaming agent 0.5～1.5 part；PVC foam regulator 7～20 parts；PVC processing aid 1.5～5.5 parts；Wood powder inorganic agent 0.2～1.0 part；Silane coupler 0.15～0.75 part；Titanate coupling agent 0.15～0.75 part；Iron oxide yellow 0.5～2.0 part。
Described high rigid, low density PVC wood plastic foamed board, wherein:
Polyvinyl chloride resin is SG-7 type or SG-8 type polyvinyl chloride resin；
PVC foam regeneration pulverizing material 40～60 order；
MS resin powdery, is methyl methacrylate and cinnamic copolymer, wherein: the content of M is 50～80wt%, melt index MI is 2～5；
Wollastonite fibre powdery, 200～325 orders, particle aspect ratio >=5；
Precipitated calcium carbonate 1000～1200 order；
Ground calcium carbonate 1250～1500 order；
Wood powder 60～90 order；
PVC complex stabilizer is the conventional complex stabilizer of PVC: lead salt complex stabilizer or rare earth composite stabilizer；
PVC in-lubricant is the conventional in-lubricant of PVC: lubricant 9696 or lubricant OA6；
PVC external lubricant is the conventional external lubricant of PVC: PE wax or lubricant AP or ZB-60；
PVC foam regulator is conventional foaming control agent: the PA-530 of PVC；
PVC processing aid is the conventional processing aid of PVC: ACR401 processing aid 1～4 part, ACR175 processing aid 0.5～1.5 part；
Silane coupler is KH-550, KH-560 or KH-570；
Wood powder inorganic agent adopts the titanate coupling agent of pyrophosphoric acid ester type, and wood powder adopts bamboo wood powder, wood powder, shell powder or powdered rice hulls；
Titanate coupling agent adopts phosphatic type titanate coupling agent。
Described high rigid, low density PVC wood plastic foamed board, the particle aspect ratio of wollastonite fibre is preferably 5～10。
The preparation method of described high rigid, low density PVC wood plastic foamed board, comprises the steps:
(1) wollastonite fibre surface treatment
Wollastonite and silane coupler are put into mixing 15～20min in high-speed mixer, and it is standby that temperature of charge is raised to discharge when 80～120 DEG C；
(2) wood powder surface treatment
Wood powder and wood powder inorganic agent are put into mixing 15～20min in high-speed mixer, and it is standby that temperature of charge is raised to discharge when 80～120 DEG C；
(3) precipitated calcium carbonate, ground calcium carbonate surface treatment
Precipitated calcium carbonate powder body or heavy calcium carbonate powder being put into titanate coupling agent respectively and mix 15～20min in high-speed mixer, it is standby that temperature of charge is raised to discharge when 100～120 DEG C；
(4) PVC wood plastic foamed board molding
A, other raw materials except foaming agent are weighed by formula proportion after put into high-speed mixer mixes to temperature of charge reach 100～120 DEG C time, add AC foaming agent and NC foaming agent；When continuation mixing to temperature of charge reaches 110～120 DEG C, being entered by material in low speed mixer, it is standby that continuation mixing to temperature of charge reaches discharge when 50～70 DEG C；
B, the material of step A gained being put in high temperature conical double screw extruder, extrusion process becomes the tabular fused materials of different-thickness；
C, the fused materials obtained by step B, become sheet material through stock mould cooling and shaping；
D, the sheet material obtained by step C, cut into 1.22 × 2.44m through double-cut saw2Standard plate；Thus, it is thus achieved that high rigid, low density PVC wood plastic foamed board。
The preparation method of described high rigid, low density PVC wood plastic foamed board, the technical specification of this foamed board is as follows:
Density: 0.45～0.75g/cm3；MOR: 18～25MPa；The modulus of elasticity in static bending: 1800～2600MPa；Hot strength: 8～15MPa；Elongation at break: 5～12%；Heat distortion temperature: 80～90 DEG C。
The preparation method of described high rigid, low density PVC wood plastic foamed board, the operating procedure condition of high temperature conical double screw extruder is as follows: screw speed 15～30N/min, screw rod oil temperature 80～110 DEG C, barrel zone temperature 145～185 DEG C, merging core temperature 140～160 DEG C, mold temperature 160～185 DEG C, die lip temperature 140～160 DEG C。
The preparation method of described high rigid, low density PVC wood plastic foamed board, the rotating speed of high-speed mixer is 1200～1800rpm, and the rotating speed of low speed mixer is 80～120rpm。
The design philosophy of the present invention is as follows:
(1) PVC wood plastic foamed board formula
In order to the rigidity making PVC foam sheet material is big, density is little, outward appearance is good, timber can be replaced preferably to use, concrete measure is: A. fills substantial amounts of wollastonite fibre in formula and replaces traditional calcium carbonate, can significantly improve foamed board rigidity (because wollastonite fibre have bigger length through than, after silane coupler activates, PVC is had good reinforcing effect, not only can improve the intensity of PVC, it is particular enable to significantly improve the rigidity of PVC foam sheet material, it is also easy to simultaneously in PVC and disperses, overcome short glass fiber not easily scattered shortcoming in PVC, also overcome the defect that the foaming plate rigidity prepared with pearl filler is relatively low)；B. adopt MS resin alloy modified PVC resin, not only can improve processing and the foam performance of polyvinyl chloride resin, rigidity and the case hardness of PVC foam sheet material can also be significantly improved simultaneously, make PVC foam panel weight light, good rigidly；C. adding appropriate wood powder in foaming formulation can make foaming plate apparent more like timber, can also play reduction weight simultaneously, improve the effect of rigidity；D., formula adds appropriate lightweight (or heavy) calcium carbonate and mainly reduces cost, improve processing characteristics。Innovative point in formula is exactly: adopting draw ratio wollastonite fibre more than 5 is main stuffing, joins proper amount of wood powder, calcium carbonate mixing filling system, and with MS blending and modifying PVC foam formula, to reach high rigidity, low-density effect。
(2) PVC wood plastic foamed board preparation method
Wollastonite fibre surface treatment, wood powder surface treatment, precipitated calcium carbonate and ground calcium carbonate surface treatment are combined, utilize conical double screw extruder, adopt extrusion foaming technique, directly foaming powder-material is squeezed into Wood-plastic foam sheet material, production efficiency is high, and cost reduces。
Advantages of the present invention and providing the benefit that:
1, the present invention adopts physical method to carry out the novel wood-plastic intermingling material of macromolecular material, this sheet material is with polrvinyl chloride for material of main part, with the organic material such as wood powder, bamboo powder and other inorganic material for filler, and add various auxiliary agent, adopt extrusion foaming explained hereafter to go out Wood-plastic foam sheet material。This timber intensity height, light weight, waterproof, beautiful appearance and environment-protecting asepsis, overcome when conventional polyvinyl chloride foamed plate uses and need surface lacquer, operates inconvenience and causes the disadvantage of environmental pollution。
2, PVC wood plastic foaming plate of the present invention has high rigidity (i.e. the modulus of elasticity in static bending close to timber), (density is at 0.45～0.75g/cm for low-density3), the feature such as thermostability higher (heat distortion temperature >=80 DEG C)。
Detailed description of the invention
In a specific embodiment, counting by weight, height rigid, low density PVC wood plastic foamed board formula of the present invention is composed as follows:
Polyvinyl chloride resin (such as SG-7 type or SG-8 type polyvinyl chloride resin) 100 parts, for the material of main part in formula, its effect is that filler and other compounding ingredient are bonded into an entirety, has certain physical and mechanical properties material；
PVC foam regeneration pulverizing material (40～60 order) 20～40 parts, its effect is able to improve the charging rate of PVC mixed powder, improves the plasticizing effect of material, improves foam performance；
MS resin (powdery, it is methyl methacrylate and cinnamic copolymer, wherein: the content of M is 50～80wt%, melt index MI is 2～5) 5～25 parts, its effect is to improve the rigidity of polyvinyl chloride resin, hardness, improves processing characteristics and the foam performance of polyvinyl chloride resin；
Wollastonite fibre (powdery, 200～325 orders, particle aspect ratio >=5, particle aspect ratio is preferably 5～10) 10～50 parts, its effect is able to significantly improve the rigidity of PVC foam sheet material；
Precipitated calcium carbonate (1000～1200 order) 5～25 parts, its effect is to reduce cost, increases melt strength；
Ground calcium carbonate (1250～1500 order) 5～30 parts, its effect is to reduce cost, improves processing characteristics；
Wood powder (60～90 order) 10～30 parts, its effect improves the rigidity of foaming plate, reduces density, improves the outward appearance of foaming plate；
PVC commonly uses complex stabilizer (such as lead salt complex stabilizer or rare earth composite stabilizer etc.) 4～8 parts, and its effect is the heat stability improving polyvinyl chloride resin, improves the processing characteristics of polyvinyl chloride resin；
PVC commonly uses in-lubricant (such as lubricant 9696 or lubricant OA6) 0.5～2 part, its effect is by reducing the active force between PVC molecule, in reduction processing, the internal friction between PVC molecule is thus reducing frictional heat, improves the plasticizing effect of material；
PVC commonly uses external lubricant (such as PE wax or lubricant AP or ZB-60) 0.5～1.5 part, and its effect is to reduce the material adhesion to barrel and mouth die, reduces extrusion energy consumption, improves foaming plate surface smoothness；
AC foaming agent 0.5～2.0 part, its effect is PVC main foaming agent, significantly reduces foamed board density；
NC foaming agent 0.5～1.5 part, its effect is auxiliary blowing agent, it is possible to suitably absorbs the heat produced when AC foaming agent decomposes, makes foaming more steady, it is to avoid interior burnt phenomenon；
PVC commonly use foaming control agent (as: PA-530 etc.) 7～20 parts, its effect be improve PVC plastic effect, improve melt strength, make abscess more fine and smooth uniformly, improve foaming effect, reduce panel density；
PVC commonly uses processing aid (ACR401) 1～4 part, and its effect is to improve PVC plastic effect, improves foam performance；
PVC commonly uses processing aid (ACR175) 0.5～1.5 part, and its effect is able to make the PVC foam bark effect that hardens better；
Wood powder inorganic agent 0.2～1.0 part, its effect is able to make wood powder be become lipophile by hydrophilic, improves the dispersibility of wood powder, improves the bond strength with PVC molecule；
Silane coupler 0.15～0.75 part, its effect is the dispersibility improving wollastonite fibre in PVC, improves the bond strength with PVC molecule, improves the rigidity of sheet material；
Titanate coupling agent 0.15～0.75 part, its effect is the dispersibility improving calcium carbonate in PVC, improves the bond strength with PVC；
Iron oxide yellow 0.5～2.0 part, its effect is dyeing, makes foamed board have an outward appearance of timber, and not fugitive color。
The preparation technology of above-mentioned high rigid, low density PVC wood plastic foamed board is as follows:
(1) wollastonite fibre surface treatment
Wollastonite and silane coupler being put into and mix about 15～20min in high-speed mixer, it is standby that temperature of charge is raised to discharge when 80～120 DEG C。Wherein, silane coupler can adopt KH-550, KH-560 or KH-570。
(2) wood powder surface treatment
Wood powder and wood powder inorganic agent being put into and mix about 15～20min in high-speed mixer, it is standby that temperature of charge is raised to discharge when 80～120 DEG C。Wherein, wood powder inorganic agent can adopt the titanate coupling agent of pyrophosphoric acid ester type, and wood powder can adopt bamboo wood powder, wood powder, shell powder or powdered rice hulls。
(3) precipitated calcium carbonate, ground calcium carbonate surface treatment
Precipitated calcium carbonate powder body or heavy calcium carbonate powder being put into titanate coupling agent respectively and mix about 15～20min in high-speed mixer, it is standby that temperature of charge is raised to discharge when 100～120 DEG C。Wherein, titanate coupling agent can adopt phosphatic type titanate coupling agent。
(4) PVC wood plastic foamed board molding
A, other raw materials except foaming agent are weighed by formula proportion after put into high-speed mixer mixes to temperature of charge reach 100～120 DEG C time, add AC foaming agent and NC foaming agent；When continuation mixing to temperature of charge reaches 110～120 DEG C, being entered by material in low speed mixer, it is standby that continuation mixing to temperature of charge reaches discharge when 50～70 DEG C。
B, the material of step A gained being put in high temperature conical double screw extruder, extrusion process becomes the tabular fused materials of different-thickness。
C, the fused materials obtained by step B, become sheet material through stock mould cooling and shaping。
D, the sheet material obtained by step C, cut into 1.22 × 2.44m through double-cut saw2Standard plate。
E thus, it is thus achieved that high rigid, low density PVC wood plastic foamed board, its performance is as follows:
Density: 0.45～0.75g/cm3；MOR: 18～25MPa；The modulus of elasticity in static bending: 1800～2600MPa；Hot strength: 8～15MPa；Elongation at break: 5～12%；Heat distortion temperature: 80～90 DEG C。
Wherein, the operating procedure condition of high temperature conical double screw extruder is as follows: screw speed 15～30N/min, screw rod oil temperature 80～110 DEG C, barrel zone temperature 145～185 DEG C, merging core temperature 140～160 DEG C, mold temperature 160～185 DEG C, die lip temperature 140～160 DEG C。
Wherein, the rotating speed of high-speed mixer is 1200～1800rpm, and the rotating speed of low speed mixer is 80～120rpm。
Below, by embodiment, the present invention is described in more detail。
Embodiment 1
Counting by weight, the present embodiment height rigid, low density PVC wood plastic foamed board formula is composed as follows:
Polyvinyl chloride resin (SG-8 type polyvinyl chloride resin) 100 parts；
PVC foam regeneration pulverizing material (40 order) 30 parts；
MS resin (powdery, M content 50～80wt%, melt index MI are 2～5) 20 parts；
Wollastonite fibre (powdery, 200 orders, particle aspect ratio 5) 10 parts；
Precipitated calcium carbonate (1000 order) 20 parts；
Ground calcium carbonate (1250 order) 20 parts；
Wood powder (60 order) 20 parts；
PVC commonly uses complex stabilizer (lead salt complex stabilizer or rare earth composite stabilizer) 6 parts；
PVC commonly uses in-lubricant (lubricant 9696 or lubricant OA6) 1 part；
PVC commonly uses external lubricant (PE wax or lubricant AP or ZB-60) 1 part；
AC foaming agent 1.2 parts；
NC foaming agent 1 part；
PVC commonly uses foaming control agent (PA-530) 14 parts；
PVC commonly uses processing aid (ACR401) 1.5 parts；
PVC commonly uses processing aid (ACR175) 1 part；
Wood powder inorganic agent 0.5 part；
Silane coupler 0.2 part；
Titanate coupling agent 0.5 part；
Iron oxide yellow 1 part；
The preparation technology of above-mentioned high rigid, low density PVC wood plastic foamed board is as follows:
(1) wollastonite fibre surface treatment
Wollastonite and silane coupler being put into and mix about 15～20min in high-speed mixer, it is standby that temperature of charge is raised to discharge when 100 DEG C。Wherein, silane coupler can adopt KH-550, KH-560 or KH-570。
(2) wood powder surface treatment
Wood powder and wood powder inorganic agent being put into and mix about 15～20min in high-speed mixer, it is standby that temperature of charge is raised to discharge when 100 DEG C。Wherein, wood powder inorganic agent can adopt the titanate coupling agent of pyrophosphoric acid ester type, and wood powder can adopt bamboo wood powder, wood powder, shell powder or powdered rice hulls。
(3) precipitated calcium carbonate, ground calcium carbonate surface treatment
Precipitated calcium carbonate powder body or heavy calcium carbonate powder being put into titanate coupling agent respectively and mix about 15～20min in high-speed mixer, it is standby that temperature of charge is raised to discharge when 110 DEG C。Wherein, titanate coupling agent can adopt phosphatic type titanate coupling agent。
(4) PVC wood plastic foamed board molding
A, other raw materials except foaming agent are weighed by formula proportion after put into high-speed mixer mixes to temperature of charge reach 110 DEG C time, add AC foaming agent and NC foaming agent；When continuation mixing to temperature of charge reaches 115 DEG C, being entered by material in low speed mixer, it is standby that continuation mixing to temperature of charge reaches discharge when 60 DEG C。
B, the material of step A gained being put in high temperature conical double screw extruder, extrusion process becomes the tabular fused materials of different-thickness。
C, the fused materials obtained by step B, become sheet material through stock mould cooling and shaping。
D, the sheet material obtained by step C, cut into 1.22 × 2.44m through double-cut saw2Standard plate。
E thus, it is thus achieved that high rigid, low density PVC wood plastic foamed board。
In the present embodiment, the operating procedure condition of high temperature conical double screw extruder is as follows: screw speed 20N/min, screw rod oil temperature 100 DEG C, barrel zone temperature 160 DEG C, merging core temperature 160 DEG C, mold temperature 160 DEG C, die lip temperature 160 DEG C。It addition, the rotating speed of high-speed mixer is 1600rpm, the rotating speed of low speed mixer is 100rpm。
In the present embodiment, foamed board performance: density: 0.56g/cm3；MOR: 21.3MPa；The modulus of elasticity in static bending: 1830MPa；Hot strength: 9.8MPa；Elongation at break: 9.8%；Heat distortion temperature: 82 DEG C。
Embodiment 2
Difference from Example 1 is in that, counts by weight, and the present embodiment height rigid, low density PVC wood plastic foamed board formula is composed as follows:
Polyvinyl chloride resin (SG-8 type polyvinyl chloride resin) 100 parts；
PVC foam regeneration pulverizing material (40 order) 30 parts；
MS resin (powdery, M content 50～80wt%, melt index MI are 2～5) 20 parts；
Wollastonite fibre (powdery, 200 orders, particle aspect ratio 5) 30 parts；
Precipitated calcium carbonate (1000 order) 10 parts；
Ground calcium carbonate (1250 order) 10 parts；
Wood powder (60 order) 20 parts；
PVC commonly uses complex stabilizer (lead salt complex stabilizer or rare earth composite stabilizer) 6 parts；
PVC commonly uses in-lubricant (lubricant 9696 or lubricant OA6) 1 part；
PVC commonly uses external lubricant (PE wax or lubricant AP or ZB-60) 1 part；
AC foaming agent 1.2 parts；
NC foaming agent 1 part；
PVC commonly uses foaming control agent (PA-530) 14 parts；
PVC commonly uses processing aid (ACR401) 1.5 parts；
PVC commonly uses processing aid (ACR175) 1 part；
Wood powder inorganic agent 0.5 part；
Silane coupler 0.6 part；
Titanate coupling agent 0.3 part；
Iron oxide yellow 1 part；
In the present embodiment, foamed board performance: density: 0.63g/cm3；MOR: 23.1MPa；The modulus of elasticity in static bending: 2150MPa；Hot strength: 11.6MPa；Elongation at break: 8.2%；Heat distortion temperature: 81 DEG C。
Embodiment 3
Difference from Example 1 is in that, counts by weight, and the present embodiment height rigid, low density PVC wood plastic foamed board formula is composed as follows:
Polyvinyl chloride resin (SG-8 type polyvinyl chloride resin) 100 parts；
PVC foam regeneration pulverizing material (40 order) 30 parts；
MS resin (powdery, M content 50～80wt%, melt index MI are 2～5) 20 parts；
Wollastonite fibre (powdery, 200 orders, particle aspect ratio 5) 50 parts；
Precipitated calcium carbonate (1000 order) 5 parts；
Ground calcium carbonate (1250 order) 5 parts；
Wood powder (60 order) 20 parts；
PVC commonly uses complex stabilizer (lead salt complex stabilizer or rare earth composite stabilizer) 6 parts；
PVC commonly uses in-lubricant (lubricant 9696 or lubricant OA6) 1 part；
PVC commonly uses external lubricant (PE wax or lubricant AP or ZB-60) 1 part；
AC foaming agent 1.2 parts；
NC foaming agent 1 part；
PVC commonly uses foaming control agent (PA-530) 14 parts；
PVC commonly uses processing aid (ACR401) 1.5 parts；
PVC commonly uses processing aid (ACR175) 1 part；
Wood powder inorganic agent 0.5 part；
Silane coupler 0.75 part；
Titanate coupling agent 0.15 part；
Iron oxide yellow 1 part；
In the present embodiment, foamed board performance: density: 0.65g/cm3；MOR: 24.6MPa；The modulus of elasticity in static bending: 2580MPa；Hot strength: 12.7MPa；Elongation at break: 6.4%；Heat distortion temperature: 85 DEG C。
Embodiment 4
Difference from Example 1 is in that, counts by weight, and the present embodiment height rigid, low density PVC wood plastic foamed board formula is composed as follows:
Polyvinyl chloride resin (SG-7 type polyvinyl chloride resin) 100 parts；
PVC foam regeneration pulverizing material (50 order) 30 parts；
MS resin (powdery, M content 50～80wt%, melt index MI are 2～5) 10 parts；
Wollastonite fibre (powdery, 200 orders, particle aspect ratio 6) 50 parts；
Precipitated calcium carbonate (1100 order) 5 parts；
Ground calcium carbonate (1300 order) 5 parts；
Wood powder (70 order) 20 parts；
PVC commonly uses complex stabilizer (lead salt complex stabilizer or rare earth composite stabilizer) 6 parts；
PVC commonly uses in-lubricant (lubricant 9696 or lubricant OA6) 1 part；
PVC commonly uses external lubricant (PE wax or lubricant AP or ZB-60) 1 part；
AC foaming agent 1.2 parts；
NC foaming agent 1 part；
PVC commonly uses foaming control agent (PA-530) 14 parts；
PVC commonly uses processing aid (ACR401) 1.5 parts；
PVC commonly uses processing aid (ACR175) 1 part；
Wood powder inorganic agent 0.5 part；
Silane coupler 0.75 part；
Titanate coupling agent 0.15 part；
Iron oxide yellow 1 part；
In the present embodiment, foamed board performance: density: 0.74g/cm3；MOR: 19.8MPa；The modulus of elasticity in static bending: 2140MPa；Hot strength: 9.7MPa；Elongation at break: 5.1%；Heat distortion temperature: 84 DEG C。
Embodiment 5
Difference from Example 1 is in that, counts by weight, and the present embodiment height rigid, low density PVC wood plastic foamed board formula is composed as follows:
Polyvinyl chloride resin (SG-7 type polyvinyl chloride resin) 100 parts；
PVC foam regeneration pulverizing material (50 order) 30 parts；
MS resin (powdery, M content 50～80wt%, melt index MI are 2～5) 20 parts；
Wollastonite fibre (powdery, 325 orders, particle aspect ratio 6) 50 parts；
Precipitated calcium carbonate (1100 order) 5 parts；
Ground calcium carbonate (1300 order) 5 parts；
Wood powder (70 order) 20 parts；
PVC commonly uses complex stabilizer (lead salt complex stabilizer or rare earth composite stabilizer) 6 parts；
PVC commonly uses in-lubricant (lubricant 9696 or lubricant OA6) 1 part；
PVC commonly uses external lubricant (PE wax or lubricant AP or ZB-60) 1 part；
AC foaming agent 1.4 parts；
NC foaming agent 1.2 parts；
PVC commonly uses foaming control agent (PA-530) 15 parts；
PVC commonly uses processing aid (ACR401) 1.5 parts；
PVC commonly uses processing aid (ACR175) 1 part；
Wood powder inorganic agent 0.5 part；
Silane coupler 0.75 part；
Titanate coupling agent 0.15 part；
Iron oxide yellow 1 part；
In the present embodiment, foamed board performance: density: 0.53g/cm3；MOR: 22.8MPa；The modulus of elasticity in static bending: 2450MPa；Hot strength: 10.8MPa；Elongation at break: 7.3%；Heat distortion temperature: 83 DEG C。
Embodiment 6
Difference from Example 1 is in that, counts by weight, and the present embodiment height rigid, low density PVC wood plastic foamed board formula is composed as follows:
Polyvinyl chloride resin (SG-7 type polyvinyl chloride resin) 100 parts；
PVC foam regeneration pulverizing material (60 order) 30 parts；
MS resin (powdery, M content 50～80wt%, melt index MI are 2～5) 20 parts；
Wollastonite fibre (powdery, 325 orders, particle aspect ratio 8) 50 parts；
Precipitated calcium carbonate (1200 order) 10 parts；
Ground calcium carbonate (1400 order) 10 parts；
Wood powder (80 order) 10 parts；
PVC commonly uses complex stabilizer (lead salt complex stabilizer or rare earth composite stabilizer) 6 parts；
PVC commonly uses in-lubricant (lubricant 9696 or lubricant OA6) 1 part；
PVC commonly uses external lubricant (PE wax or lubricant AP or ZB-60) 1 part；
AC foaming agent 1.4 parts；
NC foaming agent 1.2 parts；
PVC commonly uses foaming control agent (PA-530) 15 parts；
PVC commonly uses processing aid (ACR401) 1.5 parts；
PVC commonly uses processing aid (ACR175) 1 part；
Wood powder inorganic agent 0.25 part；
Silane coupler 0.75 part；
Titanate coupling agent 0.3 part；
Iron oxide yellow 1 part；
In the present embodiment, foamed board performance: density: 0.55g/cm3；MOR: 23.8MPa；The modulus of elasticity in static bending: 2330MPa；Hot strength: 11.7MPa；Elongation at break: 10.5%；Heat distortion temperature: 81 DEG C。
Embodiment 7
Difference from Example 1 is in that, counts by weight, and the present embodiment height rigid, low density PVC wood plastic foamed board formula is composed as follows:
Polyvinyl chloride resin (SG-7 type polyvinyl chloride resin) 100 parts；
PVC foam regeneration pulverizing material (60 order) 30 parts；
MS resin (powdery, M content 50～80wt%, melt index MI are 2～5) 20 parts；
Wollastonite fibre (powdery, 325 orders, particle aspect ratio 8) 50 parts；
Precipitated calcium carbonate (1200 order) 5 parts；
Ground calcium carbonate (1400 order) 5 parts；
Wood powder (80 order) 20 parts；
PVC commonly uses complex stabilizer (lead salt complex stabilizer or rare earth composite stabilizer) 6 parts；
PVC commonly uses in-lubricant (lubricant 9696 or lubricant OA6) 1 part；
PVC commonly uses external lubricant (PE wax or lubricant AP or ZB-60) 1 part；
AC foaming agent 1.5 parts；
NC foaming agent 1.3 parts；
PVC commonly uses foaming control agent (PA-530) 16 parts；
PVC commonly uses processing aid (ACR401) 2 parts；
PVC commonly uses processing aid (ACR175) 1 part；
Wood powder inorganic agent 0.5 part；
Silane coupler 0.75 part；
Titanate coupling agent 0.15 part；
Iron oxide yellow 1 part；
In the present embodiment, foamed board performance: density: 0.45g/cm3；MOR: 19.5MPa；The modulus of elasticity in static bending: 2040MPa；Hot strength: 8.4MPa；Elongation at break: 6.4%；Heat distortion temperature: 80 DEG C。
Claims (6)
1. one kind high rigid, low density PVC wood plastic foamed board, it is characterised in that count by weight, this foamed board formula is composed as follows:
Polyvinyl chloride resin 100 parts；PVC foam 20～40 parts of pulverizing material of regeneration；MS resin 5～25 parts；Wollastonite fibre 10～50 parts；Precipitated calcium carbonate 5～25 parts；Ground calcium carbonate 5～30 parts；Wood powder 10～30 parts；PVC complex stabilizer 4～8 parts；PVC in-lubricant 0.5～2.0 part；PVC external lubricant 0.5～1.5 part；AC foaming agent 0.5～2.0 part；NC foaming agent 0.5～1.5 part；PVC foam regulator 7～20 parts；PVC processing aid 1.5～5.5 parts；Wood powder inorganic agent 0.2～1.0 part；Silane coupler 0.15～0.75 part；Titanate coupling agent 0.15～0.75 part；Iron oxide yellow 0.5～2.0 part；
Polyvinyl chloride resin is SG-7 type or SG-8 type polyvinyl chloride resin；
PVC foam regeneration pulverizing material 40～60 order；
MS resin powdery, is methyl methacrylate and cinnamic copolymer, wherein: the content of M is 50～80wt%, melt index MI is 2～5；
Wollastonite fibre powdery, 200～325 orders, particle aspect ratio >=5；
Precipitated calcium carbonate 1000～1200 order；
Ground calcium carbonate 1250～1500 order；
Wood powder 60～90 order；
PVC complex stabilizer is the conventional complex stabilizer of PVC: lead salt complex stabilizer or rare earth composite stabilizer；
PVC in-lubricant is the conventional in-lubricant of PVC: lubricant 9696 or lubricant OA6；
PVC external lubricant is the conventional external lubricant of PVC: PE wax or lubricant AP or ZB-60；
PVC foam regulator is conventional foaming control agent: the PA-530 of PVC；
PVC processing aid is the conventional processing aid of PVC: ACR401 processing aid 1～4 part, ACR175 processing aid 0.5～1.5 part；
Silane coupler is KH-550, KH-560 or KH-570；
Wood powder inorganic agent adopts the titanate coupling agent of pyrophosphoric acid ester type, and wood powder adopts bamboo wood powder, shell powder or powdered rice hulls；
Titanate coupling agent adopts phosphatic type titanate coupling agent。
2. the high rigid, low density PVC wood plastic foamed board described in claim 1, it is characterised in that the particle aspect ratio of wollastonite fibre is 5～10。
3. the preparation method of the high rigid, low density PVC wood plastic foamed board described in a claim 1, it is characterised in that comprise the steps:
(1) wollastonite fibre surface treatment
Wollastonite fibre and silane coupler are put into mixing 15～20min in high-speed mixer, and it is standby that temperature of charge is raised to discharge when 80～120 DEG C；
(2) wood powder surface treatment
Wood powder and wood powder inorganic agent are put into mixing 15～20min in high-speed mixer, and it is standby that temperature of charge is raised to discharge when 80～120 DEG C；
(3) precipitated calcium carbonate, ground calcium carbonate surface treatment
Precipitated calcium carbonate powder body or heavy calcium carbonate powder being put into titanate coupling agent respectively and mix 15～20min in high-speed mixer, it is standby that temperature of charge is raised to discharge when 100～120 DEG C；
(4) PVC wood plastic foamed board molding
A, other raw materials except foaming agent are weighed by formula proportion after put into high-speed mixer mixes to temperature of charge reach 100～120 DEG C time, add AC foaming agent and NC foaming agent；When continuation mixing to temperature of charge reaches 110～120 DEG C, being entered by material in low speed mixer, it is standby that continuation mixing to temperature of charge reaches discharge when 50～70 DEG C；
B, the material of step A gained being put in high temperature conical double screw extruder, extrusion process becomes the tabular fused materials of different-thickness；
C, the fused materials obtained by step B, become sheet material through stock mould cooling and shaping；
D, the sheet material obtained by step C, cut into 1.22 × 2.44m through double-cut saw2Standard plate；Thus, it is thus achieved that high rigid, low density PVC wood plastic foamed board。
4. the preparation method of the high rigid, low density PVC wood plastic foamed board described in claim 3, it is characterised in that the technical specification of this foamed board is as follows:
Density: 0.45～0.75g/cm3；MOR: 18～25MPa；The modulus of elasticity in static bending: 1800～2600MPa；Hot strength: 8～15MPa；Elongation at break: 5～12%；Heat distortion temperature: 80～90 DEG C。
5. the preparation method of the high rigid, low density PVC wood plastic foamed board described in claim 3, it is characterized in that, the operating procedure condition of high temperature conical double screw extruder is as follows: screw speed 15～30n/min, screw rod oil temperature 80～110 DEG C, barrel zone temperature 145～185 DEG C, merging core temperature 140～160 DEG C, mold temperature 160～185 DEG C, die lip temperature 140～160 DEG C。
6. the preparation method of the high rigid, low density PVC wood plastic foamed board described in claim 3, it is characterised in that the rotating speed of high-speed mixer is 1200～1800rpm, and the rotating speed of low speed mixer is 80～120rpm。
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