CN105484377B - A kind of polyurethane and the molding composite board of wood-plastic co-extrusion and preparation method thereof - Google Patents

A kind of polyurethane and the molding composite board of wood-plastic co-extrusion and preparation method thereof Download PDF

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CN105484377B
CN105484377B CN201410475164.XA CN201410475164A CN105484377B CN 105484377 B CN105484377 B CN 105484377B CN 201410475164 A CN201410475164 A CN 201410475164A CN 105484377 B CN105484377 B CN 105484377B
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composite board
wood
foaming layer
chamber
wood moulding
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CN105484377A (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 application provides a kind of polyurethane and the molding composite board of wood-plastic co-extrusion, it includes wood moulding frame and foaming layer, the wood moulding frame is provided with first chamber, the foaming layer is filled in the first chamber, the foaming layer is mutually be bonded with the wall surface of the first chamber, and the foaming layer is made of the polyurethane material of foaming.The composite board of the coextrusion mold of the embodiment of the present invention, the raw material of foaming layer carries out sudden reaction and foaming directly in composite board, to form the foaming layer, save the process that the prior art forms secondary filling thermal insulation material after wood moulding Hollow wall plate, enormously simplify processing technology, drain on manpower and material resources is saved, and foaming layer is mutually be bonded with wood moulding frame in forming process, it is complex as a whole foaming layer with wood moulding frame, further improves the physical strength and heat insulating and sound insulating performance of integral wall.

Description

A kind of polyurethane and the molding 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 more particularly to a kind of polyurethane and the molding composite board of wood-plastic co-extrusion and its Preparation method.
Background technique
It is existing to produce skill using the extrusions such as plastic tree cosmetics and wood powder, wood-fibred wood-plastic products and co-extrusion foaming Art, is mostly the foaming using wood moulding itself and the surface layers such as surface layer co-extrusion PVC, PMMA, intermediate inner cavity be all it is vacant, if necessary As heat-insulated cavity, then need to squeeze into polyurathamc thermal insulation material (such as molding wood plastic product internal cavities are secondary Foamed material is perfused by the atrium or silent chamber of perfusion normal direction composite board in CN101545300A);Or use wood moulding shell The thermal insulation materials such as polyurethane foam, rock wool or foaming perlite are manually added to the inner cavity of wood moulding shell is secondary after molding is cooling, Need to consume great cost of labor, efficiency is extremely low so that being difficult to realize batch production.
Summary of the invention
In order to solve above-mentioned prior art problem, the present invention prepares one kind, and there is foaming layer and wood moulding frame to be complex as one The composite board of the coextrusion mold of body further improves the physical strength and heat insulating and sound insulating performance of composite board.
The present invention provides a kind of polyurethane and the molding composite board of wood-plastic co-extrusion comprising wood moulding frame and foaming Layer, the wood moulding frame are provided with first chamber,
The foaming layer is filled in the first chamber, and the foaming layer is mutually be bonded with the wall surface of the first chamber, The foaming layer is made of the polyurethane material of foaming.
Preferably, the composite board further includes one or more second chambers.
Preferably, one or multi-channel first point for being parallel to the composite board plane is set in the wood moulding frame Every interior muscle.
Preferably, it is provided perpendicular in the wood moulding frame in one or multi-channel second separation of the composite board Muscle.
Preferably, one end of the composite board is provided with convex stupefied, and fluted, one block of composite board is arranged in another opposite end Convex stupefied can match grafting with the groove of another block of composite board.
Preferably, one end of the composite board is provided with step structure, and another opposite end is provided with step structure, and one piece Composite board step structure can be in mating connection with the step structure of another block of composite board.
Preferably, the wood moulding frame includes following raw material:
Polyethylene or polypropylene or polyvinyl chloride or chliorinated polyvinyl chloride or 30~98 parts by weight of polymethyl methacrylate;
The wood powder can be preferably rice and kernel shell powder, wood powder, bamboo powder, peanut shell powder, crops tangerine bar powder, corncob One or more of powder, wood shavings powder and waste paper powder.
The draw ratio of the wood powder is less than 40:1, and partial size is less than 2mm.
Preferably, the foaming layer includes such as component A raw material and B component raw material,
Component A raw material includes following raw material:
B component raw material includes:
30.0~90.0 parts by weight of isocyanates.
Polyether polyol or polyester polyol can be using conventional use of polyether polyol or polyester in urethane raw Polyalcohol, it is further preferred that the present invention uses two kinds of polyether polyol or two kinds of polyester polyol.
The present invention also provides a kind of preparation method such as above-mentioned composite board, the composite board is total to by extrusion die Extrusion forming, the extrusion die include die ontology and the first mold core, and shape is arranged on the die ontology in first mold core At type it is intracavitary, between first mold core and the die ontology exist for inject melt Wood-plastic material gap;It should Preparation method includes the following steps:
The Wood-plastic material of molten state is sent into the type chamber, and is cooled and shaped in the gap location, to form the wood Mould frame;
The wood moulding frame from the output end of extrusion die send out when, by the raw material of foaming layer be divided into the first performed polymer and Second performed polymer enters the extrusion die by first runner and second flow channel respectively, the first chamber is sent into after converging Or converge in the first chamber, sudden reaction and foaming occurs, to form the hair being complex as a whole with wood moulding frame Alveolar layer;
The foaming layer and wood moulding frame resynchronisation pass through shaper, cooling and shaping, to be made described compound Plate.
Preferably, the extrusion die further includes one or more second mold core, between second mold core and with it is described There is the gap of the Wood-plastic material for injecting melting, the preparation method between die ontology, the first mold core further include:
The Wood-plastic material of the molten state is sent into the type chamber, formed after gap location cooling and shaping with foaming The wood moulding frame that layer is complex as a whole includes muscle in outer layer and separation.
Preferably, convergence tube, the first runner and second are provided on the outside of the extruding end of the extrusion die Road is connected to convergence tube respectively;The preparation method further include:
First performed polymer and the second performed polymer pass through first runner respectively and second flow channel enters the extrusion die, The first chamber is sent into after converging, comprising: first performed polymer and the second performed polymer pass through first runner and second respectively Runner passes through the die ontology, type chamber and the first mold core, then converges in the convergence tube, finally enters first chamber It is indoor.
Compared with related technology, the application's is had the beneficial effect that:
(1) composite board of the coextrusion mold of the embodiment of the present invention, the raw material of foaming layer carry out directly in composite board Sudden reaction and foaming save secondary filling after prior art molding wood moulding Hollow wall plate to form the foaming layer The process of thermal insulation material, enormously simplifies processing technology, has saved drain on manpower and material resources, and the foaming layer in forming process It is mutually be bonded with wood moulding frame, it is complex as a whole foaming layer with wood moulding frame, further improves the physical strength of integral wall With heat insulating and sound insulating performance.
(2) composite board of the coextrusion mold of the embodiment of the present invention, foaming layer can realize foaming effect 490Kg/m3Hereinafter, Even up to 238Kg/m3, play high-efficiency insulated thermal insulation and sound insulation effect.
(3) composite board of the coextrusion mold of the embodiment of the present invention is realized by the extrusion die of special designing, is gathered The raw material components of urethane pass through first runner respectively and second flow channel passes through the Wood-plastic material of the molten state in mold cavity, then It is then passed through the first chamber that the first mold core enters wood moulding frame, so that with Wood-plastic material synchronous forming, polyurethane is tightly bonded In the first chamber of wood moulding frame, to form a monolithic composite panel material.Do not influence wood moulding frame it is molding in advance under, Solve the problems, such as that polyurethane passes through wood moulding frame and enters composite board inner cavity chamber.
(4) composite board of the coextrusion mold of the embodiment of the present invention can be according to drawing directly from work when being used as ash wall body plate Factory's blanking cutting, be transported to building site can the assembly directly such as building blocks, which can be embossed as needed, The various decorations processing such as coating, transfer, overlay film.The ash wall body plate is disposably solved from interior to outdoor wall, is had The performances such as heat preservation, heat-insulated, sound insulation, indoor outer surface such as no longer needs to keep the temperature at other processing, when site operation is greatly saved Between, scene is not needed using caulking agent, surface covering, nail, foaming sealant etc. process, is obviously improved light house construction While efficiency, live almost no pollution, almost without construction rubbish scene residual.Rapid construction, in same ground base Can complete a whole set of villa on the day of general.
Detailed description of the invention
Fig. 1 is the schematic diagram of the output end of the extrusion die in the embodiment of the present invention 1;
Fig. 2 be Fig. 1 in A1-A1 to diagrammatic cross-section;
Fig. 3 be Fig. 2 in spreader B1-B1 to diagrammatic cross-section;
Fig. 4 is the diagrammatic cross-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 end of the extrusion die in the embodiment of the present invention 2;
Fig. 6 is the diagrammatic cross-section of the composite board of the coextrusion mold of the embodiment of the present invention 2;
Fig. 7-12 is the diagrammatic cross-section of the composite board of the coextrusion mold of 3-8 of the embodiment of the present invention;
Appended drawing reference: 1- wood moulding frame, 11- first separate interior muscle, and 12- second separates interior muscle, and 13- is convex stupefied, 14- groove, 15- step structure, 2- foaming layer, 3- extrusion die, 31- die ontology, 311- connection template, 312- shunt template, 313- at Pattern plate, the outlet 314- template, the first mold core of 32-, the second mold core of 33-, 34- type chamber, 341- wood moulding feed inlet, 35- are first-class Road, 36- second flow channel, 37- convergence tube, 38- spreader
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be noted that not conflicting In the case of, the features in the embodiments and the embodiments of the present application can mutual any combination.
Embodiment 1
(1) raw material is weighed:
Weigh the raw material of wood moulding frame 1 (i.e. Wood-plastic material layer): 40 parts by weight of polyvinyl chloride, wood powder (35 weight of wood powder Measure part, 10 parts by weight of inorganic filler, 8 parts by weight of impact modifier, 2 parts by weight of lubricant, 2 parts by weight of stabilizer, expanding material 2 Parts by weight, 1 parts by weight of processing aid.
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 polyether polyols Alcohol, the first 37 parts by weight of polyether polyol;Second of 16 parts by weight of polyether polyol;1 parts by weight of catalyst;0.9 weight of silicone oil Measure part;3 parts by weight of foaming agent;0.3 parts by weight of lubricant;9 parts by weight of fire retardant;10 parts by weight of inorganic filler;B component (i.e. Two performed polymers) formula: 39 parts by weight of isocyanates.
(2) manufacturing process:
For composite board by 3 coextrusion mold of extrusion die, extrusion die 3 includes die ontology 31 and the first mold core 32, and first Mold core 32 is arranged in the type chamber 34 formed on die ontology 31,
It is added in the hopper of the first extruder after the raw material of above-mentioned wood moulding frame 1 is mixed, then squeezes out the wood of molten state Moulding material.It is cooled and shaped by the Wood-plastic material feeding type chamber 34 of molten state, and in gap location, which includes the first chamber Room.When extrusion die 3 is provided with one or more second mold cores 33, between the second mold core 33 and with die ontology 31, first There is the gap for inject the Wood-plastic material melted between mold core 32, by the Wood-plastic material feeding type chamber 34 of molten state, The wood moulding frame 1 being complex as a whole with foaming layer 2 formed after being cooled and shaped at gap includes muscle in outer layer and separation.
Wood moulding frame 1 from the output end of extrusion die 3 send out when, by the raw material of foaming layer 2 be divided into the first performed polymer and Second performed polymer enters extrusion die 3 by first runner 35 and second flow channel 36 respectively, be sent into after converging first chamber or First chamber is converged, and sudden reaction and foaming occurs, to form the foaming layer 2 being complex as a whole with wood moulding frame 1.When crowded When being provided with convergence tube 37 on the outside of the extruding end of mold 3 out, the first performed polymer and the second performed polymer pass through first runner respectively 35 and second flow channel 36 pass through die ontology 31, type chamber 34 and the first mold core 32, then converge in convergence tube 37, finally enter In first chamber.When being not provided with convergence tube 37, the first performed polymer and the second performed polymer pass through first runner 35 and second respectively Runner 36 is directly entered first chamber and converges.
Finally, passing through shaper, the cooling of shaper through supercooling and wood moulding frame 1 after molding and foaming layer 2 System is cooled to room temperature wood moulding frame 1 and foaming layer 2, and wood moulding frame 1 and foaming layer 2 thoroughly solidify, to form wood moulding frame Then the composite board of frame 1 and foaming layer 2 is pulled by the uniform velocity dragger again, fixed length cutting as needed is packed and stored.
(3) extrusion die:
Referring to Fig.1 and 2, specific extrusion die 3: including die ontology 31 and the first mold core 32, the charging of mold End is connect with extruder.Die ontology 31 further include pass sequentially through connection template 311 that bolt is attached, shunt template 312, Forming panel 313 and outlet template 314, connection template 311 are connect with extruder.
First mold core 32 is arranged in the type chamber 34 formed on die ontology 31, first mold core 32 and die ontology 31 it Between exist for inject melt Wood-plastic material gap.Extrusion die 3 is provided with first runner 35 and second flow channel 36, and first Runner 35 and second flow channel 36 sequentially pass through die ontology 31, type chamber 34 and the first mold core 32 into first chamber respectively.First Performed polymer and the second performed polymer pass through first runner 35 respectively and second flow channel 36 enters first chamber.
In order to be provided with two or more separation chambers in composite board, can also be arranged in extrusion die 3 one or Multiple second mold cores 33.There is the gap of the Wood-plastic material for injecting melting between second mold core 33 and die ontology 31, the There is also the gap of the Wood-plastic material for injecting melting between two mold cores 33 and between the second mold core 33 and the first mold core 32, It is connected between these gaps and the first mold core 32 and the interval of die ontology 31, can shape again after injecting the Wood-plastic material of melting The wood moulding frame part of plywood material.
In order to which the first mold core 32 and the second mold core 33 are fixed in extrusion die 3, the first mold core 32 and the second mold core 33 It can be connect respectively by dowel with die ontology 31, one end of the first mold core 32 and the second mold core 33 can also be passed through into spiral shell Bolt with connect template 311 or shunt template 312 connect, to realize fixation.
Mold shown in Fig. 1 and 2 can manufacture composite board shown in Fig. 4, and as illustrated in fig. 1 and 2, extrusion die 3 includes One the first mold core 32 and two the second mold cores 33.
The Wood-plastic material for injecting melting is provided between first mold core 32 and the second mold core 33 and die ontology 31 Gap, the Wood-plastic material melted in this way enter the outer layer that these gaps form the wood moulding frame 1 of composite board.
The gap of the Wood-plastic material for injecting melting is provided between first mold core 32 and two the second mold cores 33, The Wood-plastic material melted in this way enters the gap between the first mold core 32 and two the second mold cores 33, is formed in parallel with after cooling multiple It closes the first of plate plane and separates interior muscle 11.
Two the second mold cores 33 are provided with the gap of the Wood-plastic material for injecting melting, the wood moulding of molten state between each other Material enters the mutual gap of two the second mold cores 33, can be formed after cooling one second separate in muscle 12, second point It is vertical with muscle 11 in the first separation every interior muscle 12.
First, which separates interior muscle 11 and second, separates one first separation that wood moulding frame 1 is separated into close outside by interior muscle 12 Chamber and two second separation chambers, foaming layer 2 are filled and are bonded in the first compartment room, and it is empty that another two second separates chamber It sets.It is corresponding that the shape of the cross section of two the second mold cores 33 separates chamber cross section with above-mentioned two second respectively.
Forming panel 313 is provided with the first entrance and second entrance of foamed material, first entrance and 35 phase of first runner Connection, second entrance are connected with first runner 36, and such first performed polymer enters through first entrance and first runner 35 and converges Pipe 37, the second performed polymer enter convergence tube 37 through second entrance and second flow channel 36, exist in the first performed polymer and the second performed polymer Convergence tube 37 enters back into first chamber after converging, addition polymerization and foaming are then carried out in first chamber, to form foaming layer 2.
In order to which the Wood-plastic material to the molten in extrusion die 3 cools down, water is provided in die ontology 31 Cooling duct or water cooling chamber.
It shunts template 312 and is provided with wood moulding feed inlet 341, the Wood-plastic material for the molten that extruder squeezes out can be from wood moulding Feed inlet 341, which enters, shunts template 312, and type chamber 34 is entered after shunting the shunting function of template 312.
As shown in Figures 2 and 3, in order to reduce first runner 35 and second flow channel 36 to the resistance of the Wood-plastic material of molten state, First runner 35 and second flow channel 36 are made of the spreader 38 for being provided with two hollow channels respectively the part of type chamber 34.Point Stream shuttle 38 is shuttle shape structure.
As disposable embodiment, first runner 35 and second flow channel 36 can pass through and shunt template 312 and first Mold core 32, subsequently into first chamber, without pass through type chamber 34.
(4) composite board
The both ends of its composite board produced are respectively arranged with step structure 15, and one piece of composite board step structure 15 can be with It is in mating connection with the step structure 15 of another block of composite board.
Embodiment 2
The present embodiment produces composite board as shown in FIG. 6, and preparation method and raw material are substantially the same manner as Example 1.No It is with point: uses extrusion die shown in fig. 5.
Extrusion die: mold shown in fig. 5 can manufacture composite board shown in fig. 6, as shown in figure 5, extrusion die 3 wraps Include first mold core 32 and three the second mold cores 33.
The Wood-plastic material for injecting melting is provided between first mold core 32 and the second mold core 33 and die ontology 31 Gap, the Wood-plastic material melted in this way enter the outer layer that these gaps form wood moulding frame 1.
The gap of the Wood-plastic material for injecting melting is provided between first mold core 32 and three the second mold cores 33, in this way The Wood-plastic material of melting enters the gap between the first mold core 32 and three the second mold cores 33, is formed in parallel with composite plate after cooling The first of the wood moulding frame of material plane separates interior muscle 11
The gap of the Wood-plastic material for injecting melting, the wood moulding of such molten state are provided between three the second mold cores 33 Material enters the gap between three the second mold cores 33, can form the second of two wood moulding frames after cooling and separate interior muscle 12, Muscle 12 is vertical with muscle 11 in the first separation in second separation.
First, which separates interior muscle 11 and second, separates one first separation that wood moulding frame 1 is separated into close outside by interior muscle 12 Chamber and three second separation chambers, foaming layer 2 are filled and are bonded in the first compartment room, and it is empty that the other three second separates chamber It sets.It is corresponding that the shape of the cross section of three the second mold cores 33 separates the cross section of chamber with above three second respectively.
Composite board: since the shape of type chamber 34 is different from the shape of embodiment 1, the shape of the composite board prepared by It is different.As shown in fig. 6, equal one end of the composite board of its production is provided with first convex stupefied 13, another opposite end is provided with first Groove 14, the first of one block of composite board convex stupefied 13 can match grafting with the first groove 14 of another block of composite board.
Embodiment 3
Composite board as shown in Figure 7 is produced, preparation method and raw material are substantially the same manner as Example 2, and difference is:
Extrusion die: extrusion die 3 is only provided with the first mold core 32, without the second mold core 33 is arranged.First mold core 32 The gap of the Wood-plastic material for injecting melting is provided between die ontology 31, the Wood-plastic material melted in this way enters gap Afterwards, the wood moulding frame 1 that composite board is formed in the periphery of the first mold core 32, after being cooled and shaped, composite board only one the One chamber, foaming layer 2 are then filled and are bonded in first chamber.
Embodiment 4
Composite board as shown in Figure 8 is produced, preparation method and raw material are substantially the same manner as Example 2, and difference is: First mold core 32 and second mold core 33 are provided in extrusion die 3, as shown in figure 8, the composite board of its production is set Muscle 11 and the interior muscle 12 of the second separation in the first separation together for be parallel to 1 plane of wood moulding frame is equipped with to be separated into wood moulding frame 1 One first separation chamber and a second chamber, foaming layer 2 are filled and are bonded in the first compartment room, another second point Separate space room is vacant.
Embodiment 5
Composite board as shown in Figure 9 is produced, preparation method and raw material are substantially the same manner as Example 2, and difference is: First mold core 32 and two the second mold cores 33 are only provided in extrusion die 3.As shown in figure 9, the composite board of production is set Be equipped be parallel to 1 plane of wood moulding frame twice first separate interior muscle 11 and second separate in muscle 12 wood moulding frame 1 is separated into One first separation chamber and two second chambers, foaming layer 2 are filled and are bonded in the first compartment room, and another two second is divided Separate space room is vacant.
Embodiment 6
Composite board as shown in Figure 10 is produced, preparation method and raw material are substantially the same manner as Example 2, and difference exists In: the second mould of the second mold core 33 and a ting model of 32, the three big model of first mold core is provided in extrusion die 3 Core 33.As shown in Figure 10, the twice first that the composite board setting of production is parallel to 1 plane of wood moulding frame separate interior 11 He of muscle Perpendicular to muscle 12 in two second separations of 1 plane of wood moulding frame, first, which separates interior muscle 11 and second, separates interior muscle 12 for wood moulding Frame 1 is separated into one first separation chamber and four second chambers, and foaming layer 2 is filled and is bonded in the first compartment room, It is vacant that other four second separates chamber.
Embodiment 7
Composite board as shown in figure 11 is produced, preparation method and raw material are substantially the same manner as Example 1, and difference exists In:
Extrusion die 3 is only provided with the first mold core 32, without the second mold core 33 is arranged.Of its composite board produced There is first chamber, without second chamber, foaming layer 2 is filled and is bonded in first chamber.
Embodiment 8
Composite board as shown in figure 12 is produced, preparation method and raw material are substantially the same manner as Example 1, and difference exists In: first mold core 32 and second mold core 33 are provided in extrusion die 3, mental section is using gold shown in Figure 12 Genotype material 2.
As shown in figure 12, the composite board setting produced is parallel in the first separation together of 1 plane of wood moulding frame Muscle 11, first, which separates interior muscle 11, is separated into one first separation chamber and one second separation chamber, foaming layer for wood moulding frame 1 2 fill and are bonded in the first compartment room wherein, another the second separation chamber is vacant.
Embodiment 9
Embodiment 9 is identical as the preparation method of embodiment 1, and difference is, the wood moulding frame 1 that uses and foaming layer 2 Raw material is different
Weigh the raw material of wood moulding frame 1: 52 parts by weight of polyethylene, 20 parts by weight of wood powder, 10 parts by weight of inorganic filler, profit 2 parts by weight of lubrication prescription, 2 parts by weight of expanding material, 1 parts by weight of processing aid, 3 parts by weight of impact modifier, 9 parts by weight of fire retardant.
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 polyether polyols Alcohol, the first 28 parts by weight of polyether polyol;Second of 25 parts by weight of polyether polyol;1.2 parts by weight of catalyst;Silicone oil 0.8 Parts by weight;2.8 parts by weight of foaming agent;0.4 parts by weight of lubricant;8 parts by weight of fire retardant;12 parts by weight of inorganic filler;B component (i.e. the second performed polymer) formula: 42 parts by weight of isocyanates.
Embodiment 10
Embodiment 10 is identical as the preparation method of embodiment 1, and difference is, the wood moulding frame 1 that uses and foaming layer 2 Raw material is different
Weigh the raw material of wood moulding frame 1: 40 parts by weight of polypropylene, 27 parts by weight of bamboo powder, inorganic are filled out at 10 parts by weight of fire retardant Fill 15 parts by weight of agent, 5 parts by weight of impact modifier, 1 parts by weight of lubricant, 2 parts by weight of expanding material.
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 polyether polyols Alcohol, the first 25 parts by weight of polyether polyol;Second of 25 parts by weight of polyether polyol;0.8 parts by weight of catalyst;Silicone oil 0.2 Parts by weight;3.0 parts by weight of foaming agent;0.3 parts by weight of lubricant;9 parts by weight of fire retardant;12 parts by weight of inorganic filler;B component (i.e. the second performed polymer) formula: 40 parts by weight of isocyanates.
Embodiment 11
Embodiment 11 is identical as the preparation method of embodiment 1, and difference is, the wood moulding frame 1 that uses and foaming layer 2 Raw material is different,
The raw material of wood moulding frame 1: 40 parts by weight of chliorinated polyvinyl chloride, 30 parts by weight of wood powder, 3 parts by weight of foaming agent is weighed, 7 parts by weight of inorganic filler, 8 parts by weight of impact modifier, 2 parts by weight of lubricant, 3 parts by weight of stabilizer, 1 weight of expanding material Part, 1 parts by weight of processing aid.
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 polyether polyols Alcohol, the first 20 parts by weight of polyether polyol;Second of 30 parts by weight of polyether polyol;1.6 parts by weight of catalyst;Silicone oil 0.6 Parts by weight;4.5 parts by weight of foaming agent;0.3 parts by weight of lubricant;4 parts by weight of fire retardant;10 parts by weight of inorganic filler;B component (i.e. the second performed polymer) formula: 38 parts by weight of isocyanates.
Test case
The composite board (integral wall thickness 180mm, outer layer wood moulding wall thickness 10mm) of Example 1 and 9-11 preparation, root Foam inner layer density and wood moulding framework density are measured according to JG169-2005, and fire-protection rating, root are tested according to GB 50222-1995 According to the heat transfer coefficient of GB/T 13475-2008 measurement sample.Its test result is shown in Table 1.
Table 1
By the data of table 1 it is found that composite board prepared by the embodiment of the present invention 1 and 9-11, foaming layer 2 is without wood The raw materials such as powder, wood fibre, glass fibre and basalt fibre are, it can be achieved that foaming effect 100-800Kg/m3Hereinafter, subtracting significantly The light weight of composite board.And fire-protection rating can achieve fire-retardant B2 grades or B1 grade, and flame retardant property is better than solid wood log cabin Wall.Heat transfer coefficient is lower than W/ (m2K), thermal insulation property is significantly larger than the conventional houses such as concrete, air entrained concrete, hollow brick, Thermal insulation property is better than solid wood wooden house wall.
Although disclosed herein embodiment it is as above, the content is only to facilitate understanding the present invention and adopting Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details, But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.

Claims (11)

1. a kind of polyurethane and the molding composite board of wood-plastic co-extrusion, which is characterized in that it includes wood moulding frame and foaming layer, institute It states wood moulding frame and is provided with first chamber,
The Wood-plastic material of molten state is sent into extrusion die, and is cooled and shaped, to form the wood moulding frame;The foaming layer is filled out It fills in the first chamber, the foaming layer is mutually be bonded with the wall surface of the first chamber, and the foaming layer is the poly- of foaming Urethane material is made;
When the wood moulding frame is sent out from the output end of extrusion die, the raw material of foaming layer is divided into the first performed polymer and second in advance Aggressiveness enters the extrusion die by first runner and second flow channel respectively, the first chamber is sent into after converging or in institute It states first chamber to converge, sudden reaction and foaming occurs, to form the foaming layer being complex as a whole with wood moulding frame;Institute It is synchronous with the wood moulding frame by shaper, cooling and shaping to state foaming layer.
2. composite board according to claim 1, wherein the composite board further includes one or more second chambers.
3. according to claim 1 or composite board described in any one of 2, wherein be provided in the wood moulding frame flat Row separates interior muscle in one or multi-channel the first of the composite board plane.
4. composite board according to claim 1 or 2, wherein be provided perpendicular in the wood moulding frame described multiple One or multi-channel the second of plywood material separates interior muscle.
5. composite board according to claim 1 or 2, wherein one end of the composite board is provided with convex stupefied, Ling Yixiang Opposite end setting is fluted, and the convex of one block of composite board stupefied can match grafting with the groove of another block of composite board.
6. composite board according to claim 1 or 2, wherein one end of the composite board is provided with step structure, separately One opposite end is provided with step structure, and one piece of composite board step structure can match with the step structure of another block of composite board Close connection.
7. composite board according to claim 1 or 2, wherein the wood moulding frame includes following raw material:
Polyethylene or polypropylene or polyvinyl chloride or chliorinated polyvinyl chloride or 30~98 parts by weight of polymethyl methacrylate;
10~60 parts by weight of wood powder;
0~5.0 parts by weight of foaming agent;
0.0~50 parts by weight of inorganic filler;
0.0~20 parts by weight of impact modifier;
0.0~8.0 parts by weight of lubricant;
0.0~8.0 parts by weight of stabilizer;
0.0~20.0 parts by weight of fire retardant;
0.0~8.0 parts by weight of expanding material.
8. composite board according to claim 1 or 2, wherein the foaming layer includes component A raw material and B component raw material,
Component A raw material includes following raw material:
B component raw material includes:
30.0~90.0 parts by weight of isocyanates.
9. the preparation method of composite board a method as claimed in any one of claims 1-8, which is characterized in that the composite board is by squeezing out Mold coextrusion mold, the extrusion die include die ontology and the first mold core, and first mold core is arranged in the mold sheet The type formed on body is intracavitary, exists between first mold core and the die ontology for injecting between the Wood-plastic material melted Gap;The preparation method includes the following steps:
The Wood-plastic material of molten state is sent into the type chamber, and is cooled and shaped in the gap location, to form the wood moulding frame Frame;
When the wood moulding frame is sent out from the output end of extrusion die, the raw material of foaming layer is divided into the first performed polymer and second Performed polymer enters the extrusion die by first runner and second flow channel respectively, be sent into after converging the first chamber or The first chamber is converged, and sudden reaction and foaming occurs, to form the foaming layer being complex as a whole with wood moulding frame;
The foaming layer and wood moulding frame resynchronisation pass through shaper, cooling and shaping, so that the composite board be made.
10. preparation method according to claim 9, wherein the extrusion die further includes one or more second mold cores, There is the sky of the Wood-plastic material for injecting melting between second mold core and between the die ontology, the first mold core Gap, the preparation method further include:
The Wood-plastic material of the molten state is sent into the type chamber, what is formed after the gap is cooled and shaped is multiple with foaming layer The wood moulding frame being integrated includes muscle in outer layer and separation.
11. preparation method according to claim 9 or 10, wherein be arranged in the outside of the extruding end of the extrusion die There is convergence tube, the first runner and second flow channel are connected to convergence tube respectively;The preparation method further include:
First performed polymer and the second performed polymer pass through first runner respectively and second flow channel enters the extrusion die, converge After be sent into the first chamber, comprising: first performed polymer and the second performed polymer pass through first runner and second flow channel respectively Across the die ontology, type chamber and the first mold core, then converge in the convergence tube, finally enters the first chamber It is interior.
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CN109235808A (en) * 2018-07-24 2019-01-18 安徽省万帮新型建材科技有限公司 A kind of heat preservation Wood plastic wall board
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