CN105484377A - Polyurethane and wood plastic co-extrusion molding composite board and preparation method thereof - Google Patents

Polyurethane and wood plastic co-extrusion molding composite board and preparation method thereof Download PDF

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Publication number
CN105484377A
CN105484377A CN201410475164.XA CN201410475164A CN105484377A CN 105484377 A CN105484377 A CN 105484377A CN 201410475164 A CN201410475164 A CN 201410475164A CN 105484377 A CN105484377 A CN 105484377A
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composite board
wood
foaming layer
framework
core rod
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CN201410475164.XA
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CN105484377B (en
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赵永生
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Beijing New Building Material Group Co Ltd
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Beijing New Building Material Group Co Ltd
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Abstract

The present invention provides a polyurethane and wood plastic co-extrusion molding composite board. The polyurethane and wood plastic co-extrusion molding composite board comprises a wood plastic frame and a foaming layer; the wood plastic frame is provided with a first cavity; the foaming layer is put in the first cavity; the foaming layer is bonded to the wall surface of the first cavity; and the foaming layer is prepared by foaming polyurethane materials. According to the co-extrusion molding composite board, raw materials of the foaming layer directly perform polyaddition reaction and foaming in the composite board, so that the foaming layer is formed; the process of filling insulation materials for the second time after a wood plastic hollow wall board is molded in the prior art is saved, the processing technology is substantially simplified, and consumption of manpower and material resources is saved; and during the molding process, the foaming layer is bonded to the wood plastic frame, the foaming layer and the wood plastic frame are composited and integrated, and further physical strength and heat and sound insulation performance of the whole wall board are improved.

Description

A kind of polyurethane and the shaping composite board of wood-plastic co-extrusion and preparation method thereof
Technical field
The present invention relates to a kind of heat preservation plate material, particularly relate to a kind of polyurethane and the shaping composite board of wood-plastic co-extrusion and preparation method thereof.
Background technology
Existing employing plastic tree cosmetics and the extrusion such as wood powder, wood fiber wood-plastic products and co-extrusion foaming production technology, mostly adopt wood to mould the top layers such as self foaming and top layer co-extrusion PVC, PMMA, middle inner chamber is all vacant, if need to be used as heat-insulated cavity, then need to squeeze into polyurathamc heat insulating material (as CN101545300A pours into expanded material by perfusion to the atrium of composite board or chamber of remaining silent) at shaping wood plastic product internal cavities secondary; Or adopt wood to mould outer casing forming to cool backward wood and mould that the inner chamber secondary of shell is manual adds the heat insulating materials such as polyurethane foam, rock wool or foaming perlite, need to consume great cost of labor, efficiency is extremely low to such an extent as to be difficult to realize batch production.
Summary of the invention
In order to solve above-mentioned prior art problem, the present invention prepares and a kind ofly has foaming layer and mould the composite board of the coextrusion mold that framework is complex as a whole with wood, further increases physical strength and the heat insulating and sound insulating performance of composite board.
The invention provides a kind of polyurethane and the shaping composite board of wood-plastic co-extrusion, it comprises wood and moulds framework and foaming layer, and described wood is moulded framework and is provided with the first chamber,
Described foaming layer is filled in described first chamber, and described foaming layer is mutually bonding with the wall of described first chamber, and described foaming layer is that the polyurethane material of foaming is made.
Preferably, described composite board also comprises one or more second chamber.
Preferably, described wood mould in framework be provided be parallel to described composite board plane one or multi-channel first separate in muscle.
Preferably, described wood mould in framework be provided with perpendicular to described composite board one or multi-channel second separate in muscle.
Preferably, one end of described composite board is provided with convex stupefied, and another opposite end is provided with groove, one block of composite board convex stupefied can with the fit depressions grafting of another block composite board.
Preferably, one end of described composite board is provided with ledge structure, and another opposite end is provided with ledge structure, and one piece of composite board ledge structure can be in mating connection with the ledge structure of another block composite board.
Preferably, described wood is moulded framework and is comprised following raw material:
Polyethylene or polypropylene or polyvinyl chloride or chlorinated polyvinyl chloride or polymethyl methacrylate 30 ~ 98 weight portion;
Described wood powder can be preferably one or more in rice wheat husk powder, timber powder, bamboo powder, peanut hull meal, crops tangerine bar powder, maize cob meal, wood shavings powder and waste paper powder.
The draw ratio of described wood powder is less than 40:1, and particle diameter is less than 2mm.
Preferably, described foaming layer comprises as component A raw material and B component raw material,
Component A raw material comprises following raw material:
B component raw material comprises:
Isocyanates 30.0 ~ 90.0 weight portion.
PPG or PEPA can adopt PPG or the PEPA of conventional use in urethane raw, and further preferably, the present invention adopts two kinds of PPGs or two kinds of PEPAs.
Present invention also offers a kind of preparation method of composite board described above, described composite board is by extrusion die coextrusion mold, described extrusion die comprises die ontology and the first core rod, described first core rod is arranged in die cavity that described die ontology is formed, there is the gap of the Wood-plastic material for injecting melting between described first core rod and described die ontology; This preparation method comprises the steps:
The Wood-plastic material of molten state is sent into described die cavity, and at described gap location cooling forming, thus form described wood and mould framework;
Described wood mould framework send from the output of extrusion die time, the raw material of foaming layer is divided into the first performed polymer and the second performed polymer, described extrusion die is entered respectively by first flow and the second runner, converge described first chamber of rear feeding or converge at described first chamber, there is sudden reaction and foaming, thus formed and the wooden described foaming layer of moulding framework and being complex as a whole;
It is synchronous by shaper again that framework moulded by described foaming layer and described wood, cooling and shaping, thus make described composite board.
Preferably, described extrusion die also comprises one or more second core rod, between described second core rod and and described die ontology, there is the space of the Wood-plastic material for injecting melting between the first core rod, this preparation method also comprises:
The Wood-plastic material of described molten state is sent into described die cavity, and the wood be complex as a whole with foaming layer formed after described gap location cooling forming is moulded framework and is comprised outer and muscle in separating.
Preferably, have convergence tube in the arranged outside of the extruding end of described extrusion die, described first flow is communicated with convergence tube respectively with the second runner; This preparation method also comprises:
Described first performed polymer and the second performed polymer enter described extrusion die respectively by first flow and the second runner, converge described first chamber of rear feeding, comprise: described first performed polymer and the second performed polymer pass described die ontology, die cavity and the first core rod respectively by first flow and the second runner, then converge in described convergence tube, finally enter in described first chamber.
Compared with relevant technologies, the beneficial effect of the application is as follows:
(1) composite board of the coextrusion mold of the embodiment of the present invention, the raw material of foaming layer directly carries out sudden reaction and foaming in composite board, thus form described foaming layer, save the operation of secondary fill insulant material after Hollow wall plate moulded by the shaping wood of prior art, enormously simplify processing technology, save drain on manpower and material resources, and to mould framework mutually bonding for foaming layer and wood in forming process, make foaming layer and wood mould framework to be complex as a whole, further increase physical strength and the heat insulating and sound insulating performance of integral wall.
(2) composite board of the coextrusion mold of the embodiment of the present invention, foaming layer can realize foaming effect 490Kg/m 3below, even 238Kg/m is reached 3, play high-efficiency insulated heat-insulating sound-insulating effect.
(3) composite board of the coextrusion mold of the embodiment of the present invention, realized by the extrusion die of particular design, the raw material components of polyurethane passes the Wood-plastic material of the molten state in mold cavity respectively by first flow and the second runner, and then enter through the first core rod the first chamber that framework moulded by wood, thus with Wood-plastic material synchronous forming, polyurethane is bonded in wood tightly and moulds in the first chamber of framework, thus forms a monolithic composite panel material.Do not affect wood mould framework shaping in advance under, solve polyurethane through wood mould the difficult problem that framework enters composite board inner cavity chamber.
(4) composite board of the coextrusion mold of the embodiment of the present invention, during as ash wall body plate, can according to drawing directly from factory's blanking cutting, being transported to building site can be directly assembled as building blocks, can carry out the various decorations process such as embossing, application, transfer printing, overlay film as required outside these ash wall body plate indoor.Disposable the solving of this ash wall body plate arrives outdoor body of wall indoor, possess the performances such as insulation, heat insulation, sound insulation, indoor and outdoor surface no longer needs insulation to wait other process, greatly save on-site construction time, do not need onsite application caulking agent, face coat, nail, foaming fluid sealant etc. operation, while remarkable lifting light house efficiency of construction, scene is no pollution almost, and rubbish scene of almost not constructing is residual.Rapid construction, in same ground base, the general same day can complete a whole set of villa.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the output of extrusion die in the embodiment of the present invention 1;
Fig. 2 be in Fig. 1 A1-A1 to generalized section;
Fig. 3 be spreader in Fig. 2 B1-B1 to generalized section;
Fig. 4 is the generalized section of the composite board of the coextrusion mold of the embodiment of the present invention 1;
Fig. 5 is the schematic diagram of the output of extrusion die in the embodiment of the present invention 2;
Fig. 6 is the generalized section of the composite board of the coextrusion mold of the embodiment of the present invention 2;
Fig. 7-12 is the generalized section of the composite board of the coextrusion mold of embodiment of the present invention 3-8;
Reference numeral: framework moulded by 1-wood, 11-first separates interior muscle, and 12-second separates interior muscle, and 13-is convex stupefied, 14-groove, 15-ledge structure, 2-foaming layer, 3-extrusion die, 31-die ontology, 311-connects template, and 312-shunts template, 313-forming panel, 314-exports template, 32-first core rod, 33-second core rod, 34-die cavity, charging aperture moulded by 341-wood, 35-first flow, 36-second runner, 37-convergence tube, 38-spreader
Detailed description of the invention
Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can be combined mutually.
Embodiment 1
(1) raw material is taken:
Take the raw material that framework 1 (i.e. Wood-plastic material layer) moulded by wood: polyvinyl chloride 40 weight portion, wood powder (timber powder 35 weight portion, inorganic filler 10 weight portion, impact modifier 8 weight portion, sliding agent 2 weight portion, stabilizing agent 2 weight portion, bulking agent 2 weight portion, processing aid 1 weight portion.
The raw material of foam inner layer: the raw material of foaming layer 2 is divided into component A (i.e. the first performed polymer) formula: two kinds of PPGs, the first PPG 37 weight portion; The second PPG 16 weight portion; Catalyzer 1 weight portion; Silicone oil 0.9 weight portion; Blowing agent 3 weight portion; Sliding agent 0.3 weight portion; Fire retardant 9 weight portion; Inorganic filler 10 weight portion; B component (i.e. the second performed polymer) is filled a prescription: isocyanates 39 weight portion.
(2) manufacture process:
Composite board is by extrusion die 3 coextrusion mold, and extrusion die 3 comprises die ontology 31 and the first core rod 32, first core rod 32 is arranged in the die cavity 34 of formation on die ontology 31,
Add in the hopper of the first extruder after above-mentioned wood being moulded the raw material mixing of framework 1, then extrude the Wood-plastic material of molten state.The Wood-plastic material of molten state is sent into die cavity 34, and at gap location cooling forming, this wood is moulded framework 1 and is comprised the first chamber.When extrusion die 3 is provided with one or more second core rod 33, between second core rod 33 and and die ontology 31, first core rod 32 between there is the space of the Wood-plastic material for injecting melting, the Wood-plastic material of molten state is sent into die cavity 34, and the wood be complex as a whole with foaming layer 4 formed after gap location cooling forming is moulded framework 1 and is comprised outer and muscle in separating.
Wood mould framework 1 send from the output of extrusion die 3 time, the raw material of foaming layer 2 is divided into the first performed polymer and the second performed polymer, extrusion die 3 is entered respectively by first flow 35 and the second runner 36, converge rear feeding first chamber or converge at the first chamber, there is sudden reaction and foaming, thus formed and the wooden foaming layer 2 of moulding framework 1 and being complex as a whole.When the arranged outside of the extruding end at extrusion die 3 has convergence tube 37, first performed polymer and the second performed polymer pass die ontology 31, die cavity 34 and the first core rod 32 respectively by first flow 35 and the second runner 36, then converge in convergence tube 37, finally enter in the first chamber.When not arranging convergence tube 37, the first performed polymer and the second performed polymer directly enter the first chamber respectively by first flow 35 and the second runner 36 and converge.
Finally, through supercooling and shaping after wood mould framework 1 and foaming layer 2 through shaper, the cooling system of shaper moulds framework 1 to wood and foaming layer 2 is cooled to room temperature, framework 1 moulded by wood and foaming layer 2 is thoroughly solidified, thus form the composite board that wood moulds framework 1 and foaming layer 2, and then carry out tractive by the uniform velocity tractor, fixed length cutting, packaging warehouse-in as required.
(3) extrusion die:
Please refer to Fig. 1 and Fig. 2, concrete extrusion die 3: comprise die ontology 31 and the first core rod 32, the feed end of mould is connected with extruder.Die ontology 31 also comprises connection template 311, shunting template 312, forming panel 313 and the outlet template 314 of being undertaken connecting by bolt successively, connects template 311 and is connected with extruder.
First core rod 32 is arranged in the die cavity 34 of formation on die ontology 31, there is the gap of the Wood-plastic material for injecting melting between this first core rod 32 and die ontology 31.Extrusion die 3 is provided with first flow 35 and the second runner 36, and first flow 35 and the second runner 36 enter the first chamber through die ontology 31, die cavity 34 and the first core rod 32 respectively successively.First performed polymer and the second performed polymer enter the first chamber respectively by first flow 35 and the second runner 36.
In order to be provided with two or more separation chamber at composite board, one or more second core rod 33 can also be set in extrusion die 3.The gap of the Wood-plastic material for injecting melting is there is between second core rod 33 and die ontology 31, between second core rod 33 and also there is the gap of the Wood-plastic material for injecting melting between the second core rod 33 and the first core rod 32, these gaps are communicated with between the first core rod 32 and the interval of die ontology 31, and frame part moulded by the wood of the composite board that can be shaped after injecting the Wood-plastic material of melting.
In order to the first core rod 32 and the second core rod 33 are fixed in extrusion die 3, first core rod 32 can be connected with die ontology 31 respectively by dowel with the second core rod 33, also one end of the first core rod 32 and the second core rod 33 can be connected with being connected template 311 or shunting template 312 by bolt, thus realize fixing.
Mould shown in Fig. 1 and 2 can the composite board shown in shop drawings 4, and as illustrated in fig. 1 and 2, extrusion die 3 comprises first core rod 32 and two the second core rods 33.
First core rod 32 and be provided with the gap of the Wood-plastic material for injecting melting between the second core rod 33 and die ontology 31, the Wood-plastic material of such melting enters the skin that framework 1 moulded by wood that these gaps form composite board.
The gap of the Wood-plastic material for injecting melting is provided with between first core rod 32 and two the second core rods 33, the Wood-plastic material of such melting enters the gap between the first core rod 32 and two the second core rods 33, forms the interior muscle 11 of the first separation being parallel to composite board plane after cooling.
Two the second core rods 33 are provided with the gap of the Wood-plastic material for injecting melting each other, the Wood-plastic material of molten state enters two the second core rod 33 gaps each other, can be formed after cooling one second separate in muscle 12, second separate in muscle 12 and first to separate interior muscle 11 vertical.
One first separation chamber and two the second separation chambers that framework 1 is separated into close outside moulded by wood by the interior muscle of the first separation 11 and the interior muscle 12 of the second separation, and foaming layer 2 is filled and is bonded in the first compartment indoor, and another two second separation chambers are vacant.The shape of the cross section of two the second core rods 33 is corresponding with above-mentioned two the second compartment chamber cross-sections respectively.
Forming panel 313 is provided with the first entrance and second entrance of expanded material, first entrance 371 is connected with first flow 35, second entrance is connected with first flow 36, such first performed polymer enters convergence tube 37 through the first entrance and first flow 35, second performed polymer enters convergence tube 37 through the second entrance and the second runner 36, after convergence tube 37 converges, the first chamber is entered again at the first performed polymer and the second performed polymer, then in the first chamber, carry out addition polymerization and foaming, thus form foaming layer 2.
In order to cool the Wood-plastic material of the molten in extrusion die 3, in die ontology 31, be provided with water cooling passageway or water cooling chamber.
Shunting template 312 is provided with wood and moulds charging aperture 341, and the Wood-plastic material of the molten that extruder is extruded can be moulded charging aperture 341 from wood and enter shunting template 312, after shunting the shunting action of template 312, enter die cavity 34.
As shown in Figures 2 and 3, in order to reduce the resistance of the Wood-plastic material of first flow 35 and the second runner 36 pairs of molten states, first flow 35 and the second runner 36 are made up of the spreader 38 being provided with two hollow channels respectively the part of die cavity 34.Spreader 38 is fusiformis structure.
As disposable embodiment, first flow 35 and the second runner 36 through shunting template 312 and the first core rod 32, then can enter the first chamber, do not need through die cavity 34.
(4) composite board
The two ends of its composite board produced are respectively arranged with ledge structure 15, and one piece of composite board ledge structure 15 can be in mating connection with the ledge structure 15 of another block composite board.
Embodiment 2
The present embodiment produces composite board as shown in Figure 6, its preparation method and raw material substantially the same manner as Example 1.Difference is: adopt the extrusion die shown in Fig. 5.
Extrusion die: the mould shown in Fig. 5 can the composite board shown in shop drawings 6, and as shown in Figure 5, extrusion die 3 comprises first core rod 32 and three the second core rods 33.
First core rod 32 and be provided with the gap of the Wood-plastic material for injecting melting between the second core rod 33 and die ontology 31, the Wood-plastic material of such melting enters these gaps and forms the skin that framework 1 moulded by wood.
The gap of the Wood-plastic material for injecting melting is provided with between first core rod 32 and three the second core rods 33, the Wood-plastic material of such melting enters the gap between the first core rod 32 and three the second core rods 33, forms the interior muscle 11 of the first separation that framework moulded by the wood being parallel to composite board plane after cooling
The gap of the Wood-plastic material for injecting melting is provided with between three the second core rods 33, the Wood-plastic material of such molten state enters the gap between three the second core rods 33, can be formed after cooling two wood mould second of framework separate in muscle 12, second separate in muscle 12 and first to separate interior muscle 11 vertical.
One first separation chamber and three the second separation chambers that framework 1 is separated into close outside moulded by wood by the interior muscle of the first separation 11 and the interior muscle 12 of the second separation, and foaming layer 2 is filled and is bonded in the first compartment indoor, and another three second separation chambers are vacant.The shape of the cross section of three the second core rods 33 is corresponding with above-mentioned three second cross sections separating chamber respectively.
Composite board: because the shape of die cavity 34 is different from the shape of embodiment 1, thus the profile of obtained composite board is different.As shown in Figure 6, its equal one end of composite board produced is provided with first convex stupefied 13, and another opposite end is provided with first convex stupefied 13 of the first groove 14, one block of composite board and can matches with the first groove 14 of another block composite board grafting.
Embodiment 3
Produce composite board as shown in Figure 7, its preparation method and raw material substantially the same manner as Example 2, difference is:
Extrusion die: extrusion die 3 is only provided with the first core rod 32, and does not arrange the second core rod 33.The gap of the Wood-plastic material for injecting melting is provided with between first core rod 32 and die ontology 31, after the Wood-plastic material of such melting enters gap, framework 1 moulded by the wood forming composite board in the periphery of the first core rod 32, after cooling forming, composite board only has first chamber, and foaming layer 2 is filled and is bonded in the first chamber.
Embodiment 4
Produce composite board as shown in Figure 8, its preparation method and raw material substantially the same manner as Example 2,
Difference is: be provided with first core rod 32 and second core rod 33 in extrusion die 3, as shown in Figure 8, its composite board produced be provided be parallel to wood mould framework 1 plane together first separate in muscle 11 and second separate in muscle 12 wood is moulded framework 1 and is separated into one first and separates chamber and second chamber, foaming layer 2 is filled and is bonded in the first compartment indoor, and another the second separation chamber is vacant.
Embodiment 5
Produce composite board as shown in Figure 9, its preparation method and raw material substantially the same manner as Example 2,
Difference is: be only provided with first core rod 32 and two the second core rods 33 in extrusion die 3.As shown in Figure 9, the composite board produced be provided be parallel to twice first that wood moulds framework 1 plane separate interior muscle 11 and second separate in muscle 12 wood is moulded framework 1 and is separated into one first and separates chamber and two the second chambers, foaming layer 2 is filled and is bonded in the first compartment indoor, and another two second separation chambers are vacant.
Embodiment 6
Produce composite board as shown in Figure 10, its preparation method and raw material substantially the same manner as Example 2,
Difference is: be provided with the second core rod 33 of first core rod 32, three large models and the second core rod 33 of a ting model in extrusion die 3.As shown in Figure 10, the composite board produced be provided be parallel to twice first that wood moulds framework 1 plane separate interior muscle 11 and perpendicular to wood mould two second of framework 1 plane separate in muscle 12, in first separation, wood is moulded framework 1 and is separated into one first separation chamber and four the second chambers by muscle 11 and the interior muscle 12 of the second separation, foaming layer 2 is filled and is bonded in the first compartment indoor, and another four second separation chambers are vacant.
Embodiment 7
Produce composite board as shown in figure 11, its preparation method and raw material substantially the same manner as Example 1, difference is:
Extrusion die 3 is only provided with the first core rod 32, and does not arrange the second core rod 33.Its produce composite board only have the first chamber, do not have the second chamber, foaming layer 2 is filled and is bonded in the first chamber.
Embodiment 8
Produce composite board as shown in figure 12, its preparation method and raw material substantially the same manner as Example 1,
Difference is: be provided with first core rod 32 and second core rod 33 in extrusion die 3, shape adopts the shape 2 shown in Figure 12.
As shown in figure 12, its composite board produced is provided with and is parallel to the interior muscle 11 of the first separation together that framework 1 plane moulded by wood, in first separation, wood is moulded framework 1 and is separated into one first separation chamber and one second separation chamber by muscle 11, foaming layer 2 is filled and is bonded in wherein the first compartment indoor, and another the second separation chamber is vacant.
Embodiment 9
Embodiment 9 is identical with the preparation method of embodiment 1, and difference is, it is different with the raw material of foaming layer 2 that framework 1 moulded by its wood adopted
Take the raw material that framework 1 moulded by wood: polyethylene 52 weight portion, wood powder 20 weight portion, inorganic filler 10 weight portion, sliding agent 2 weight portion, bulking agent 2 weight portion, processing aid 1 weight portion, impact modifier 3 weight portion, fire retardant 9 weight portion.
The raw material of foam inner layer: the raw material of foaming layer 2 is divided into component A (i.e. the first performed polymer) formula: two kinds of PPGs, the first PPG 28 weight portion; The second PPG 25 weight portion; Catalyzer 1.2 weight portion; Silicone oil 0.8 weight portion; Blowing agent 2.8 weight portion; Sliding agent 0.4 weight portion; Fire retardant 8 weight portion; Inorganic filler 12 weight portion; B component (i.e. the second performed polymer) is filled a prescription: isocyanates 42 weight portion.
Embodiment 10
Embodiment 10 is identical with the preparation method of embodiment 1, and difference is, it is different with the raw material of foaming layer 2 that framework 1 moulded by its wood adopted
Take the raw material that framework 1 moulded by wood: polypropylene 40 weight portion, fire retardant 10 weight portion, bamboo powder 27 weight portion, inorganic filler 15 weight portion, impact modifier 5 weight portion, sliding agent 1 weight portion, bulking agent 2 weight portion.
The raw material of foam inner layer: the raw material of foaming layer 2 is divided into component A (i.e. the first performed polymer) formula: two kinds of PPGs, the first PPG 25 weight portion; The second PPG 25 weight portion; Catalyzer 0.8 weight portion; Silicone oil 0.2 weight portion; Blowing agent 3.0 weight portion; Sliding agent 0.3 weight portion; Fire retardant 9 weight portion; Inorganic filler 12 weight portion; B component (i.e. the second performed polymer) is filled a prescription: isocyanates 40 weight portion.
Embodiment 11
Embodiment 11 is identical with the preparation method of embodiment 1, and difference is, it is different with the raw material of foaming layer 2 that framework 1 moulded by its wood adopted,
Take the raw material that framework 1 moulded by wood: chlorinated polyvinyl chloride 40 weight portion, wood powder 30 weight portion, blowing agent 3 weight portion, inorganic filler 7 weight portion, impact modifier 8 weight portion, sliding agent 2 weight portion, stabilizing agent 3 weight portion, bulking agent 1 weight portion, processing aid 1 weight portion.
The raw material of foam inner layer: the raw material of foaming layer 2 is divided into component A (i.e. the first performed polymer) formula: two kinds of PPGs, the first PPG 20 weight portion; The second PPG 30 weight portion; Catalyzer 1.6 weight portion; Silicone oil 0.6 weight portion; Blowing agent 4.5 weight portion; Sliding agent 0.3 weight portion; Fire retardant 4 weight portion; Inorganic filler 10 weight portion; B component (i.e. the second performed polymer) is filled a prescription: isocyanates 38 weight portion.
Test case
Composite board (integral wall thickness 180mm prepared by Example 1 and 9-11, wall thickness 10mm moulded by outer wood), framework density is moulded according to JG169-2005 mensuration foam inner layer density and wood, and test fire-protection rating, according to the thermal transmittance of GB/T13475-2008 working sample according to GB50222-1995.Its test result is in table 1.
Table 1
Embodiment 1 Embodiment 9 Embodiment 10 Embodiment 11
Foam inner layer density (Kg/m 3) 420 260 300 350
Outer density (Kg/m moulded by wood 3) 1255 1180 1130 850
Fire-protection rating B1 B2 B2 B1
Thermal transmittance W/ (m 2K) 0.31 0.21 0.24 0.28
Known by the data of table 1, the embodiment of the present invention 1 and the composite board prepared by 9-11, foaming layer 2 containing raw materials such as wood powder, wood fibre, glass fiber and basalt fibres, can not realize foaming effect 100-800Kg/m 3below, the weight of composite board is significantly reduced.And fire-protection rating can reach fire-retardant B2 level or B1 level, fire resistance is all better than solid wood wooden house wall.Thermal transmittance is lower than W/ (m 2k), heat-insulating property is far away higher than conventional house such as concrete, gas concrete, hollow bricks, and heat-insulating property is better than solid wood wooden house wall.
Although the embodiment disclosed by the present invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.

Claims (11)

1. polyurethane and the shaping composite board of wood-plastic co-extrusion, it is characterized in that, it comprises wood and moulds framework and foaming layer, and described wood is moulded framework and is provided with the first chamber,
Described foaming layer is filled in described first chamber, and described foaming layer is mutually bonding with the wall of described first chamber, and described foaming layer is that the polyurethane material of foaming is made.
2. composite board according to claim 1, wherein, described composite board also comprises one or more second chamber.
3. according to the composite board in claim 1 or 2 described in any one, wherein, described wood mould in framework be provided be parallel to described composite board plane one or multi-channel first separate in muscle.
4. composite board according to claim 1 and 2, wherein, described wood mould in framework be provided with perpendicular to described composite board one or multi-channel second separate in muscle.
5. composite board according to claim 1 and 2, wherein, one end of described composite board is provided with convex stupefied, and another opposite end is provided with groove, one block of composite board convex stupefied can with the fit depressions grafting of another block composite board.
6. composite board according to claim 1 and 2, wherein, one end of described composite board is provided with ledge structure, and another opposite end is provided with ledge structure, and one piece of composite board ledge structure can be in mating connection with the ledge structure of another block composite board.
7. composite board according to claim 1 and 2, wherein, described wood is moulded framework and is comprised following raw material:
Polyethylene or polypropylene or polyvinyl chloride or chlorinated polyvinyl chloride or polymethyl methacrylate 30 ~ 98 weight portion;
8. composite board according to claim 1 and 2, wherein, described foaming layer comprises as component A raw material and B component raw material:
Component A raw material comprises following raw material:
B component raw material comprises:
Isocyanates 30.0 ~ 90.0 weight portion.
9. the preparation method of the composite board as described in claim 1-8, it is characterized in that, described composite board is by extrusion die coextrusion mold, described extrusion die comprises die ontology and the first core rod, described first core rod is arranged in die cavity that described die ontology is formed, there is the gap of the Wood-plastic material for injecting melting between described first core rod and described die ontology; This preparation method comprises the steps:
The Wood-plastic material of molten state is sent into described die cavity, and at described gap location cooling forming, thus form described wood and mould framework;
Described wood mould framework send from the output of extrusion die time, the raw material of foaming layer is divided into the first performed polymer and the second performed polymer, described extrusion die is entered respectively by first flow and the second runner, converge described first chamber of rear feeding or converge at described first chamber, there is sudden reaction and foaming, thus formed and the wooden described foaming layer of moulding framework and being complex as a whole;
It is synchronous by shaper again that framework moulded by described foaming layer and described wood, cooling and shaping, thus make described composite board.
10. preparation method according to claim 9, wherein, described extrusion die also comprises one or more second core rod, between described second core rod and and described die ontology, there is the space of the Wood-plastic material for injecting melting between the first core rod, this preparation method also comprises:
The Wood-plastic material of described molten state is sent into described die cavity, and the wood be complex as a whole with foaming layer formed after described gap location cooling forming is moulded framework and is comprised outer and muscle in separating.
11. preparation methods according to claim 9 or 10, wherein, have convergence tube in the arranged outside of the extruding end of described extrusion die, described first flow is communicated with convergence tube respectively with the second runner; This preparation method also comprises:
Described first performed polymer and the second performed polymer enter described extrusion die respectively by first flow and the second runner, converge described first chamber of rear feeding, comprise: described first performed polymer and the second performed polymer pass described die ontology, die cavity and the first core rod respectively by first flow and the second runner, then converge in described convergence tube, finally enter in described first chamber.
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