CN105150644B - Co-extruded wood-plastic composite material - Google Patents
Co-extruded wood-plastic composite material Download PDFInfo
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- CN105150644B CN105150644B CN201510427616.1A CN201510427616A CN105150644B CN 105150644 B CN105150644 B CN 105150644B CN 201510427616 A CN201510427616 A CN 201510427616A CN 105150644 B CN105150644 B CN 105150644B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/02—Organic
- B32B2266/0214—Materials belonging to B32B27/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2305/00—Condition, form or state of the layers or laminate
- B32B2305/30—Fillers, e.g. particles, powders, beads, flakes, spheres, chips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2317/00—Animal or vegetable based
- B32B2317/10—Natural fibres, e.g. wool, cotton
Abstract
The invention relates to a co-extruded wood-plastic composite material which comprises a surface layer and a core layer. The co-extruded wood-plastic composite material is characterized in that a middle layer which is formed by high-polarity thermoplastic resin and plays a binding role is arranged between the surface layer and the core layer, wherein the thickness of the middle layer is not less than 0.05 mm. The high-polarity thermoplastic resin is selected from maleic anhydride grafted EVA, an ethylene-acrylic acid copolymer and the like. According to the composite material provided by the invention, the high-polarity thermoplastic resin which is originally added into the surface layer independently forms a middle layer binding layer to bind the surface layer and the core layer, so that in an equal condition, the binding force of the wood-plastic material is improved by 20-127% compared to that of the surface layer and the core layer of a double-layered co-extruded wood-plastic material.
Description
First, technical field
The present invention relates to a kind of wood plastic composite, more particularly to a kind of co-extrusion type wood plastic composite, specifically
It is a kind of by intermediate adhesive layer bonding top layer and the co-extrusion type wood plastic composite of the three-decker of sandwich layer.
2nd, background technology
Wood plastic composite be usually based on the one kind in PE, PP, PVC resin, with plant fiber powder, compatilizer,
The auxiliary agents such as lubricant, the environment friendly composite material that Jing granulations, extrusion molding are obtained.In order to improve weatherability, the resistance of Wood-plastic material
Combustion, the performance such as mould proof and add a large amount of function additives, this undoubtedly substantially increases product cost.
Common co-extrusion type Wood-plastic material is generally made up of top layer and sandwich layer, claims double-layer coextrusion wood plastic composite, its top layer
Some function additives can on demand be added, some aspect performances are improved.Sandwich layer provides mechanical property for material, typically with normal wood
Based on modeling formula, only need to add necessary processing aid, it is few to add or be not added with such as pigment, UV absorbents, fire retardant, mould inhibitor work(
Energy auxiliary agent, so as to reduce the purpose of cost.
Because processing method and table, the polarity of the base resin raw material of sandwich layer are different, the adhesion of table-sandwich layer is common common
The focal point of crowded wood moulding.In order to improve the adhesion of table-sandwich layer, often from the preferable resin of of the same race or compatibility based on
Resin, while adding highly polar thermoplastic resin in top layer to increase the adhesion between watch core layer, such as ionomer, horse
Maleic anhydride grafted polyethylene etc..First, this method limits core, the range of choice of top layer base resin, it is impossible to preferably send out
Wave the advantage of each base resin；Secondly as table-sandwich layer adhesion size depends on the bond strength at boundary layer, will bond
Resin is directly added into granulation extrusion in top layer can make its dispersed, and the binding resin for being in boundary layer is less, so only
When binding resin reaches certain addition, the binding resin of boundary layer can just make table-sandwich layer adhesion increase to certain effect,
And addition increases with the thickness on top layer and increases, this can undoubtedly cause cost to increase.
3rd, the content of the invention
In order to overcome existing double-layer coextrusion Wood-plastic material to need to add substantial amounts of highly polar thermoplastic resin in top layer with
And the defect of the limited selection of table, core material, the present invention provide it is a kind of by table-in-the co-extrusion type wood plastics composite of core three-decker
Material.Technical problem to be solved be improve on the premise of highly polar thermoplastic resin usage amount is not increased and improve table-
There are enough cohesive forces between sandwich layer.
The thinking of the present invention is that the highly polar thermoplastic resin that script is added in top layer is separately constructed into tack coat (i.e.
Middle level) bond top layer and sandwich layer.
Technical solution of the present invention includes top layer 1, sandwich layer 3, and difference with the prior art is that have between top layer 1 and sandwich layer 3
The middle level 2 that highly polar thermoplastic resin is constituted, the thickness in middle level 2 is not less than 0.05mm.
Described highly polar thermoplastic resin is selected from maleic anhydride grafting EVA, ethylene-acrylic acid copolymer, ethylene-propylene
At least one such as acetoacetic ester copolymer, ethene-vinyl acetate-ethenol copolymer.The basic tree that these resins are commonly used to wood moulding
Fat all has and is well bonded, and does not allow watch core layer easily peelable.
0.1～the 2mm of thickness of top layer 1, by resin based on the one kind in PE, PP, PVC, ASA, is added as needed on nothing
The function additives such as machine filler, pigment, lubricant, antioxidant, UV absorbents, mould inhibitor, fire retardant.
0～25% (mass percent, similarly hereinafter) plant fiber powder can also be added in top layer 1, plant fiber powder is added in right amount
It is intended to reduces cost.
The each component of top layer 1 is as follows：Base resin 60%～85%, plant fiber powder 0%～25%, compatilizer 1%～
3%, inorganic filler 3%～10%, pigment 0%～1%, lubricant 1.5%～3%, antioxidant 0.3%～2%, UV absorbs
Agent 0.3%～2%, mould inhibitor 1%～3%, fire retardant 0%～20%, anti-wear agent 0%～10%.
10～the 50mm of thickness of sandwich layer 3, the material of core 3 is selected from PE, PP base not foam wood/plastic composite material, or PVC bases are sent out
Bubble wood plastic composite materials, or the resin based on any one resin in PE, PP, PVC, according to the following ratio processing is obtained
Wood plastic composite：
Base resin 20%～60%, plant fiber powder 40%～70%, compatibility 1.5%～4%, foaming agent 0%～
0.5%, inorganic filler 5%～12%, pigment 0%～1%, lubricant 1.5%～4.5%, antioxidant 0%～1% is mould proof
Agent 0%～1.5%.
This co-extrusion type wood and plastic composite preparation method for material, comprises the following steps：The each raw material of table, sandwich layer is made after individually mixing
Grain.Top layer granulation material and middle level adhering resin are first extruded to mould by two co-extrusion subsidiary engines respectively, and sandwich layer granulation material is again by one
Main extruder is extruded to mould, adjusts each extruder engine speed and feeding rotating ratio, is finally combined into three-decker
Co-extrusion type wood plastic composite.
This sandwich layer 3 can be by the Wood-plastic material of the different colours of recovery after crushing directly when raw material is used.
Due to the raising of adhesion between table-sandwich layer, so the side of this co-extrusion type wood plastic composite can process tenon
Groove, makes easy for installation, good stability.The upper and lower surface band flank of tooth, to improve coefficient of friction and and improve aesthetic property.Sandwich layer can be with
Processing cavity, to reduce the weight of material unit length, saves use cost.
Applicant has under equal conditions carried out contrast test, as a result shows, this three-layer co-extruded Wood-plastic material is more double-deck common
The normality peeling force of crowded Wood-plastic material top layer and sandwich layer generally improves 20%～127% (table 1, table 2).So-called equal conditions are referred to
The length and width of sheet material are identical, and the thickness of top layer and sandwich layer, material and its proportioning are also identical, binding resin kind used and addition
Also it is identical.Simply binding resin constitutes in this application the thick middle levels of 1mm, is but added in top layer in comparative example.
4th, illustrate
Fig. 1～Fig. 5 is the plate construction schematic diagram of this co-extrusion type wood plastic composite.
Fig. 1 solid plain co-extrusion type wood-plastic boards.
Fig. 2 cavity co-extrusion type wood-plastic boards.
Fig. 3 cavitys band tongue-and-groove co-extrusion type wood-plastic board.
Fig. 4 cavitys flank of tooth band tongue-and-groove co-extrusion type wood-plastic board.
Dedendum flank band tongue-and-groove co-extrusion type wood-plastic board on Fig. 5.
5th, specific embodiment
With maleic anhydride grafting EVA, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethyl vinyl acetate second
The high polar thermoplastic resin such as alkene-ethenol copolymer processes middle level 2, the thickness 0.1mm of middle level 2, the thickness of top layer 1 as bonding agent
0.6mm, core layer thickness 21mm, as a example by Fig. 1 moulds, non-limiting examples are described below.Additionally, per corresponds to pair of lamina co-extrusion
Wood-plastic material, sheet material length and width are identical, and top layer is identical with consumption with the raw material used by sandwich layer, ratio, the kind of binding resin, addition
Amount is also identical.Should be known technology, process is repeated no more.
Embodiment 1
Top layer：PE80%, PE-g-MAH2%, calcium carbonate 10%, pigment 0.5%, zinc stearate 0.5%, Tissuemat E
1%, antioxidant 1010 2%, UV-531 2%, mould inhibitor 2%.Middle level：Maleic anhydride is grafted EVA50%, ethylene-propylene
Acid copolymer 50%.Sandwich layer：PE 25%, plant fiber powder 60%, PE-g-MAH 5.5%, calcium carbonate 6%, zinc stearate
1%, Tissuemat E 1.5%, antioxidant 1010 1%.
Granulate after table, each raw material of sandwich layer are individually mixed according to the above ratio.Top layer granulation material and middle level adhering resin first divide
Do not extruded to mould by two co-extrusion subsidiary engines, sandwich layer granulation material is extruded to mould again by a main extruder, adjusts each extruder
Engine speed and feeding rotating ratio, it is PE resins to be finally combined into top layer, and sandwich layer is the three-decker of PE base wood-plastic composite materials
Co-extrusion type wood plastic composite.
Embodiment 2
Top layer：PE76%, plant fiber powder 7%, PE-g-MAH 3%, calcium carbonate 6%, pigment 0.5%, zinc stearate
0.7%, Tissuemat E 1.2%, antioxidant 1010 1.8%, UV-531 1.8%, mould inhibitor 2%.Middle level：Ethylene-propylene
Acid copolymer 100%.Sandwich layer：PE 25%, plant fiber powder 60%, PE-g-MAH 5.5%, calcium carbonate 6%, zinc stearate
1%, Tissuemat E 1.5%, antioxidant 1010 1%.
Granulate after table, each raw material of sandwich layer are individually mixed according to the above ratio.Top layer granulation material and middle level adhering resin first divide
Do not extruded to mould by two co-extrusion subsidiary engines, sandwich layer granulation material is extruded to mould again by a main extruder, adjusts each extruder
Engine speed and feeding rotating ratio, are finally combined into the three-decker co-extrusion type wood moulding that core top layer is PE base wood-plastic composite materials
Composite.
Embodiment 3
Top layer：PE65%, PE-g-MAH 2%, fire retardant 25%, pigment 0.5%, zinc stearate 0.5%, Tissuemat E
1%, antioxidant 2%, UV absorbents 2%, mould inhibitor 2%.Middle level：Maleic anhydride is grafted EVA30%, ethylene-acrylic acid second
Ester copolymer 70%.Sandwich layer：PP 35%, plant fiber powder 50%, PP-g-MAH 5%, calcium carbonate 6%, zinc stearate 1%,
Polypropylene wax 2%, antioxidant 1,076 1%.
Granulate after table, each raw material of sandwich layer are individually mixed according to the above ratio.Top layer granulation material and middle level adhering resin first divide
Do not extruded to mould by two co-extrusion subsidiary engines, sandwich layer granulation material is extruded to mould again by a main extruder, adjusts each extruder
Engine speed and feeding rotating ratio, it is PE resins to be finally combined into top layer, and sandwich layer is the surface flame-retardant of PP base wood-plastic composite materials
Type three-decker co-extrusion type wood plastic composite.
Embodiment 4
Top layer：ASA62%, AS21%, pigment 0.5%, calcium carbonate 10%, zinc stearate 1%, Tissuemat E 2%, antioxygen
Agent 1,010 1.5%, mould inhibitor 2%.Middle level：Maleic anhydride is grafted EVA70%, ethene-vinyl acetate-ethenol copolymer
30%.Sandwich layer：PP 35%, plant fiber powder 50%, PP-g-MAH 5%, calcium carbonate 6%, zinc stearate 1%, polypropylene wax
2%, antioxidant 10761%.
Granulate after table, each raw material of sandwich layer are individually mixed according to the above ratio.Top layer granulation material and middle level adhering resin first divide
Do not extruded to mould by two co-extrusion subsidiary engines, sandwich layer granulation material is extruded to mould again by a main extruder, adjusts each extruder
Engine speed and feeding rotating ratio, it is ASA resin to be finally combined into top layer, and sandwich layer is three-layer co-extruded for PP base wood-plastic composite materials
Type wood plastic composite.
Embodiment 5
Top layer：PE80%, PE-g-MAH 2%, calcium carbonate 10%, pigment 0.5%, zinc stearate 1%, Tissuemat E
2%, antioxidant 1.5%, UV absorbents 1.5%, mould inhibitor 1.5%.Middle level：Ethene-vinyl acetate-ethenol copolymer
15%, ethylene-acrylic acid copolymer 85%.Sandwich layer：PVC 58%, plant fiber powder 18%, AC foaming agents 1%, ACR foaming is helped
Agent 3%, tribasic lead sulfate 1.5%, DOP 7%, calcium carbonate 8%, zinc stearate 1%, Tissuemat E 2.5%.
Granulate after table, each raw material of sandwich layer are individually mixed according to the above ratio.Top layer granulation material and middle level adhering resin first divide
Do not extruded to mould by two co-extrusion subsidiary engines, sandwich layer granulation material is extruded to mould again by a main extruder, adjusts each extruder
Engine speed and feeding rotating ratio, it is PE resins to be finally combined into top layer, and sandwich layer is three layers of PVC foam wood/plastic composite material common
Crowded type wood plastic composite.
Embodiment 6
Top layer：PVC 72%, plant fiber powder 10%, calcium carbonate 8%, tribasic lead sulfate 1.5%, pigment 0.5%, firmly
Resin acid zinc 1%, Tissuemat E 2%, DOP5%.Middle level：Ethene-vinyl acetate-ethenol copolymer 100%.Sandwich layer：PP
35%, plant fiber powder 50%, PP-g-MAH 5%, calcium carbonate 6%, zinc stearate 1%, polypropylene wax 2%, antioxidant
1010 1%.
Granulate after table, each raw material of sandwich layer are individually mixed according to the above ratio.Top layer granulation material and middle level adhering resin first divide
Do not extruded to mould by two co-extrusion subsidiary engines, sandwich layer granulation material is extruded to mould again by a main extruder, adjusts each extruder
Engine speed and feeding rotating ratio, it is polyvinyl chloride resin to be finally combined into top layer, and sandwich layer is three-layer co-extruded for PP base wood-plastic composite materials
Type wood plastic composite.
Embodiment 7
Skin-material：PE80%, PE-g-MAH 2%, calcium carbonate 10%, pigment 0.5%, zinc stearate 0.5%, poly- second
Alkene wax 1%, antioxidant 1010 2%, UV-131 2%, mould inhibitor 2%.Middle layer material：Maleic anhydride is grafted EVA100%.
Core material：Broken material is reclaimed in variegated PP sills modeling.
Granulate after table, each raw material of sandwich layer are individually mixed according to the above ratio.Top layer granulation material and middle level adhering resin first divide
Do not extruded to mould by two co-extrusion subsidiary engines, sandwich layer granulation material is extruded to mould again by a main extruder, adjusts each extruder
Engine speed and feeding rotating ratio, are finally combined into top layer for PE resins, and sandwich layer is the three-decker, altogether that PP sills mould reclaimed materials
Crowded type wood plastic composite.
Embodiment 8
Top layer：PP80%, PP-g-MAH compatilizer 2%, calcium carbonate 10%, pigment 0.5%, zinc stearate 0.5%, poly- second
Alkene wax 1%, antioxidant 1,076 2%, UV-131 2%, mould inhibitor 2%.Middle level：Ethylene-acrylic acid copolymer 100%.Core
Layer material：Broken material is reclaimed in variegated PE sills modeling.
Granulate after table, each raw material of sandwich layer are individually mixed according to the above ratio.Top layer granulation material and middle level adhering resin first divide
Do not extruded to mould by two co-extrusion subsidiary engines, sandwich layer granulation material is extruded to mould again by a main extruder, adjusts each extruder
Engine speed and feeding rotating ratio, it is PP resins to be finally combined into top layer, and sandwich layer is that the three-decker of PE sills modeling reclaimed materials is total to
Crowded type wood plastic composite.
The sheet material of embodiment and comparative example is detected between table-sandwich layer by the method that GB/T17657-2013 standards specify
Adhesion.The results are shown in Table 1, table 2.
Table 1
Table 2
Claims (6)
1. a kind of co-extrusion type wood plastic composite, including top layer (1), sandwich layer (3), it is characterised in that：In top layer (1) and sandwich layer
(3) there is middle level (2) between, top layer (1) thickness 0.6mm, middle level (2) thickness 0.1mm, sandwich layer thickness 21mm, the composition of each layer is as follows：
Top layer (1)：PE 80%, PE-g-MAH 2%, calcium carbonate 10%, pigment 0.5%, zinc stearate 1%, Tissuemat E
2%, antioxidant 1.5%, UV absorbents 1.5%, mould inhibitor 1.5%；Middle level (2)：Ethene-vinyl acetate-vinyl alcohol copolymer
Thing 15%, ethylene-acrylic acid copolymer 85%；Sandwich layer (3)：PVC 58%, plant fiber powder 18%, AC foaming agents 1%, ACR
Blowing promotor 3%, tribasic lead sulfate 1.5%, DOP 7%, calcium carbonate 8%, zinc stearate 1%, Tissuemat E 2.5%.
2. a kind of co-extrusion type wood plastic composite, including top layer (1), sandwich layer (3), it is characterised in that：In top layer (1) and sandwich layer
(3) there is middle level (2) between, top layer (1) thickness 0.6mm, middle level (2) thickness 0.1mm, sandwich layer (3) thickness 21mm, the composition of each layer is as follows：
Top layer (1)：PVC 72%, plant fiber powder 10%, calcium carbonate 8%, tribasic lead sulfate 1.5%, pigment 0.5%, firmly
Resin acid zinc 1%, Tissuemat E 2%, DOP 5%；Middle level (2)：Ethene-vinyl acetate-ethenol copolymer 100%；Sandwich layer
(3)：PP 35%, plant fiber powder 50%, PP-g-MAH 5%, calcium carbonate 6%, zinc stearate 1%, polypropylene wax 2% resists
Oxidant 1,010 1%.
3. a kind of co-extrusion type wood plastic composite, including top layer (1), sandwich layer (3), it is characterised in that：In top layer (1) and sandwich layer
(3) there is middle level (2) between, top layer (1) thickness 0.6mm, middle level (2) thickness 0.1mm, sandwich layer (3) thickness 21mm, the composition of each layer is as follows：
Top layer (1):PE 80%, PE-g-MAH 2%, calcium carbonate 10%, pigment 0.5%, zinc stearate 0.5%, Tissuemat E
1%, antioxidant 1010 2%, UV-131 2%, mould inhibitor 2%；Middle level (2):Maleic anhydride is grafted EVA 100%；Sandwich layer
(3)：Broken material is reclaimed in variegated PP sills modeling.
4. a kind of co-extrusion type wood plastic composite, including top layer (1), sandwich layer (3), it is characterised in that：In top layer (1) and sandwich layer
(3) there is middle level (2) between, top layer (1) thickness 0.6mm, middle level (2) thickness 0.1mm, sandwich layer (3) thickness 21mm, each layer composition is as follows：
Top layer (1)：PP 80%, PP-g-MAH 2%, calcium carbonate 10%, pigment 0.5%, zinc stearate 1%, Tissuemat E
1%, antioxidant 1,076 2%, UV-131 2%, mould inhibitor 2%；Middle level (2)：Ethylene-acrylic acid copolymer 100%；Sandwich layer
(3)：Broken material is reclaimed in variegated PE sills modeling.
5. a kind of co-extrusion type wood plastic composite, including top layer (1), sandwich layer (3), it is characterised in that：In top layer (1) and sandwich layer
(3) there is middle level (2) between, top layer (1) thickness 0.6mm, middle level (2) thickness 0.1mm, sandwich layer (3) thickness 21mm, each layer composition is as follows：
Top layer (1)：ASA 62%, AS 21%, pigment 0.5%, calcium carbonate 10%, zinc stearate 1%, Tissuemat E 2% resists
Oxidant 1,010 1.5%, mould inhibitor 2%；Middle level (2)：Maleic anhydride is grafted EVA 70%；Ethene-vinyl acetate-vinyl alcohol
Copolymer 30%；Sandwich layer (3)：PP 35%, plant fiber powder 50%, PP-g-MAH 5%, calcium carbonate 6%, zinc stearate 1%,
Polypropylene wax 2%, antioxidant 1,076 1%.
6. a kind of co-extrusion type wood plastic composite, including top layer (1), sandwich layer (3), it is characterised in that：In top layer (1) and sandwich layer
(3) there is middle level (2) between, top layer (1) thickness 0.6mm, middle level (2) thickness 0.1mm, sandwich layer (3) thickness 21mm, each layer composition is as follows：
Top layer (1)：PE 65%, PE-g-MAH 2%, fire retardant 25%, pigment 0.5%, zinc stearate 0.5%, Tissuemat E
1%, antioxidant 2%, UV absorbents 2%, mould inhibitor 2%；Middle level (2)：Maleic anhydride is grafted EVA 30%, ethylene-propylene
Acetoacetic ester copolymer 70%；Sandwich layer (3)：PP 35%, plant fiber powder 50%, PP-g-MAH 5%, calcium carbonate 6%, stearic acid
Zinc 1%, polypropylene wax 2%, antioxidant 1,076 1%.
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| CN201510427616.1A CN105150644B (en) | 2015-07-17 | 2015-07-17 | Co-extruded wood-plastic composite material |
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| CN201510427616.1A CN105150644B (en) | 2015-07-17 | 2015-07-17 | Co-extruded wood-plastic composite material |
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| CN112643838B (en) * | 2020-12-23 | 2022-05-10 | 安徽科居新材料科技有限公司 | Co-extruded artificial board and manufacturing method thereof |
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