CN104231462A - GPES rigid foam composite plastic insulation board and manufacturing method thereof - Google Patents

GPES rigid foam composite plastic insulation board and manufacturing method thereof Download PDF

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CN104231462A
CN104231462A CN201410516592.2A CN201410516592A CN104231462A CN 104231462 A CN104231462 A CN 104231462A CN 201410516592 A CN201410516592 A CN 201410516592A CN 104231462 A CN104231462 A CN 104231462A
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CN104231462B (en
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孙洪明
吕红国
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Shandong Prov. Construction Science Research Inst.
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Shandong Provincial Academy of Building Research
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Abstract

The invention relates to a GPES rigid foam composite plastic insulation board and a manufacturing method thereof. The GPES rigid foam composite plastic insulation board comprises the following components in part by weight: 80 to 92 parts of polystyrene, 3 to 7 parts of polyethylene, 3 to 11 parts of nano graphite particles subjected to surface physical modification and 0.04 to 0.06 part of glyceryl monostearate. After the components are mixed, the mixture is molten at a temperature of 130 DEG C to 160 DEG C; then the obtained product is mixed at a temperature of 190 DEG C to 230 DEG C and under a pressure of 4MPa to 25MPa; 2 to 4 parts of supercritical carbon dioxide fluid is injected under a pressure of 25 to 35Mpa at the tail end of a seventh section of a first extruder; homogenization and transition are carried out and the obtained product is fed into a second screw extruder by a trumpet-shaped release tube and then is mechanically subjected to scattered regulation of dynamic mixing and static mixing by the second screw extruder; after being released under the conditions of a pressure of 7 to 12MPa and a temperature of 100 plus or minus 5 DEG C, the obtained product is pressed to form the GPES rigid foam composite plastic insulation board.

Description

GPES rigid foam composite plastic warming plate and manufacture method thereof
Technical field
The present invention relates to a kind of thermal insulation rigid foam composite plastic warming plate, particularly relate to a kind of external wall outer insulation adiabatic rigid foam insulation board and manufacture method thereof.
Background technology
Current domestic external wall outer insulation is commonly used rigid foam insulation board kind and is divided into:
1, molding expanded polystyrene foams plastic, thermal-insulation plate (being called for short EPS).
Such lagging material is the conventional material that external wall outer insulation is conventional, and thermal conductivity is greater than 0.033, and Passive low-energy building needs this kind of lagging material thickness to reach 200-350mm.
Production technique adopts moulding box+steam cure foam process, adopts expandable polystyrene particle, does not need to add whipping agent again.
2, die swell polystyrene foamed plastics warming plate (being called for short XPS).
The conventional material that such lagging material is commonly used at China's external wall outer insulation, but external use seldom, and its dimensional stability is poor, and external wall outer insulation is easy to crack, thermal conductivity is greater than 0.030, and Passive low-energy building needs this kind of lagging material thickness to reach 200-250mm.
Production technique adopts expressing technique, and whipping agent generally adopts 1-chlorine-1,1-difluoroethane (HCFC-142b), freonll-11, pentane and other small molecules inflammable gass, and Material Melt temperature is higher, wood property poor stability, inflammable.All that national policy eliminates technique at present.
3, hard-foam polyurethane lagging material (be called for short PU PUR).
Such lagging material is thermosetting material, and be the external wall outer insulation conventional material that China brings into use in recent years, thermal conductivity is greater than 0.024, and Passive low-energy building needs this kind of lagging material thickness to reach 150-200mm.Cost is high, and the 2-3 being above material construction doubly, limits its range of application.
There is three productions technique: in-situ spraying technique; Moulding box bulla technique; Adopt template (carrier bar) cycle production process, once complete cast, foaming, slaking, cutting technique production.
Summary of the invention
The invention provides a kind of GPES rigid foam composite plastic warming plate and manufacture method thereof, GPES refers to the mixing polymkeric substance of polyethylene, polystyrene, modified nano graphite.
A kind of GPES rigid foam composite plastic warming plate, it comprises following component by weight: polystyrene 80 parts-92 parts, polyethylene 3 parts-7 parts, the nano-graphite particle 3 parts-11 parts through surface physics modification, glyceryl monostearate 0.04-0.06 part, through 130 DEG C of-160 DEG C of meltings after said components mixing, again through 190 DEG C-230 DEG C, mixing process under 4MPa--25 MPa pressure, bet into supercritical carbon dioxide fluid 2-4 part at the SECTOR-SEVEN section end of the first forcing machine at 25-35 MPa pressure, trumpet type releasing tube through homogenizing and transition feeds the second screw extrusion press, again through the second screw extrusion press from 160 to 45 DEG C of transition, the mixing dispersion tonality mixing with static state of mechanical dynamic under the condition of 22 to 11MPa changes, at 7-12MPa, after under 100 ± 5 DEG C of conditions, release is extruded, GPES rigid foam composite plastic warming plate is produced in compacting.
Supercritical carbon dioxide fluid is extracted from air by producing carbon dioxide machine (passing through molecular sieve), then it is obtained to be pressurized to 8MPa through high-pressure pump.
The described nano-graphite particle through surface physics modification is mixing by the Nano graphite powder 70 parts-80 parts of 0.8um-38um continuous particulate grating and polyethylene 20 parts of-30 parts of compounds, by singe screw mixing roll 150 ± 5 DEG C, under 4MPa pressure condition, extrude the obtained diameter of cooling and be less than the circular or cylindrical particle of 2mm.
Preferred weight part: modified nano graphite particle 6 parts-9 parts, polyethylene 4-5 part, polystyrene 84 parts-88 parts, glyceryl monostearate 0.05 part, supercritical carbon dioxide fluid 3.5 parts.
The sheet material color that above-mentioned formula is produced is black.For improving sheet material color, pigment can be added in above-mentioned formula; Also can add the black that 0.1 part of titanium dioxide brings to cover nano-graphite, light grey foam board can be obtained.
For improving cystose burning behavior class, when producing B1 level sheet material, can add Germany and produce fire retardant: Ke Laien 3 parts-4 parts, flame retardant properties is better.
A manufacture method for GPES rigid foam composite plastic warming plate, is characterized in that it comprises the steps:
(1) by polystyrene 80 parts-92 parts, polyethylene 3 parts-7 parts, the nano-graphite particle 3 parts-11 parts through surface physics modification, glyceryl monostearate 0.04-0.06 part; Mix mixture is for subsequent use;
(2) added by mixture in the first twin screw extruder, the work area in the first twin screw extruder is divided into seven sections:
First to the 3rd section is intensification melt zone, wherein the first zone temperatures 130 DEG C; Second section 160 DEG C; 3rd section 190 DEG C, pressure 4MPa;
4th to the 5th section is that melting is pressurizeed mixing district, the 4th zone temperatures 210 DEG C, pressure 8 MPa; 5th zone temperatures 215 ± 5 DEG C, pressure 12-15 MPa;
Six to SECTOR-SEVEN section is the mixing district of high pressure-temperature.6th zone temperatures 230 ± 5 DEG C, pressure 20-25 MPa, SECTOR-SEVEN section high pressure-temperature mixing district temperature 215 ± 5 DEG C, pressure P 1:25-35 MPa; Obtain the polymer melt of melting;
(3) carbonic acid gas metering injected system (German LEWA brand: EH3-M210 type three METERING DIAPHRAGM PUMPS and E+H brand 83A04 type mass flowmeter combined system is adopted, its operating pressure 40 MPa) supercritical carbon dioxide fluid of weight part 2-4 part is filled in the polymer melt of melting at the first forcing machine SECTOR-SEVEN end, filling pressure P 1+1MPa;
Supercritical carbon dioxide fluid mass rate control accuracy is less than ± and 0.5%.
(4) homogenizing and transition: this section is cooling area, temperature is by 215 DEG C, and pressure P 1:25-35 MPa drops to 200 ± 5 DEG C, pressure 22MPa; Homogenizing barrier and trumpet type releasing tube is provided with between first twin screw extruder outlet and the second screw extrusion press the 9th section, the polymer melt of melting feeds the 9th section of the second screw extrusion press by homogenizing barrier and trumpet type releasing tube, the polymer melt of 60% directly enters the 9th section of the second screw extrusion press, advances through screw extruding; Rest part polymer melt enters the front end of Section Eight section by the melt squeezing passage between the second screw extrusion press the 9th section and Section Eight section, after enter the 9th section by the screw extruding of Section Eight section, realize part mixing.
(5) second screw extrusion presss are divided into five sections, are Section Eight Duan Zhi Twelve-section respectively.The model of employing Tianjin Tian De rubber and plastics machine company limited is: CO 2-75X2/200 forcing machine.
Section Eight section, the 9th section, the tenth section are cooling decompression district; Section Eight section temperature 160 ± 5 DEG C, 18MPa, the 9th zone temperatures 80 ± 5 DEG C, 22MPa, the tenth zone temperatures 60 ± 5 DEG C, 18MPa;
11 zone temperatures 45 ± 5 DEG C, pressure 15MPa; Under this parameter, carry out mechanical dynamic mixing, the cooling oil path simultaneously by arranging in screw rod is forced and is realized rapidly cooling;
Twelve-section, temperature 90 ± 5 DEG C, under pressure 11Mpa environment, carries out static state by the homogenizing lattice coral being arranged at Twelve-section mixing;
(6) extrusion step: install extrusion die at Twelve-section end, die head is warming up to 100 ± 5 DEG C, expansion relief pressure 7-12MPa;
(7) sheet material shaping cutting step.
The sheet material shaping cutting production line that sheet material shaping cutting step adopts Tianjin Tian De rubber and plastics machine company limited to produce, production line comprises pair roller pressing unit, traction cooling and shaping device, machine automatization cutting unit.Obtained GPES rigid foam composite plastic warming plate.The specification of GPES rigid foam composite plastic warming plate can cut.Extrusion board width can be different according to extruding bistrique model, are divided into 600mm---1200mm.
The concrete feature of this programme also has, and mixture adopts material bucket type electronic proportioning metering system intermittent type batching, within every 5 minutes, completes Primary batching system, after be discharged into feeding surge bunker continuous flow rate, Measuring Precision ± 0.1%.
First twin screw extruder adopts the double helix exrusion envelope material of round sealed, realizes melt self damping; Be provided with cooling oil path in screw rod, cooling efficiency is high, and temperature control precision realizes ± 0.1 DEG C.
The beneficial effect of this programme is: the invention provides the foam of polymers warming plate produced by polyethylene, polystyrene, modified nano graphite particle, supercritical carbon dioxide fluid.Described foam containing conventional foam material, does not adopt the whipping agents such as 1,1,2,2-Tetrafluoroethane (HFC-134), pentane and freonll-11 yet, adopts glyceryl monostearate to make lubricant.Described modified nano graphite particle forms by the nano-graphite of polyethylene and 0.8um-38um continuous particulate grating is mixing, nano-graphite content can mix 61%-86%, the nano-graphite particle of modification effectively improves the uniform temperature fields degree of polymer melt, improve polyethylene simultaneously, polystyrene melting graft rate, have adjusted the mixing melt ductility in polymerization room, toughness and viscosity, increase cystose die head and extrude resistance, to maintain extrusion high pressure conditions (7-12MPa is than conventional extrusion processes height 3MPa), expansion release obtain evenly, diameter (is less than 50um, major part is less than 5um) less bubble, bubble circularity is higher, substantially be the bubble of closed pore.Carbon dioxide is full of in bubble.
The novel process that this programme expressing technique provides that a kind of high temperature (230-215 DEG C) high pressure (20-35 MPa) is mixing, low temperature (160-45 DEG C) high pressure (22-11MPa) disperses tonality, high pressure (7-12MPa) high temperature (100 ± 5 DEG C) compared with usual technique discharges the manufacture porous plastics extruding compacting; the invention provides a kind of outer note phase transformation foaming Novel extrusion technique, from usual chemical heat decomposes certainly foam and modified carbon dioxide foam extrusion process essence different.
1, the nano-graphite that the present invention relates to is modified nano graphite particle, and it is the Graphite Powder 99 adopting 0.8-38 um that the present invention adds nano-graphite.Utilize the heat superconducting performance (129-151W/(mK)) of graphite, polymer-melt temperature field degree of uniformity is obtained best, also become more easy to control; Owing to have employed PE modified nano-graphite, more easily obtain the higher polymer melt of percentage of grafting, thus modified nano graphite particle effectively increases the friction resistance of polymer melt at extrusion, to ensure to keep higher extrusion pressure than usual expressing technique, generally want high 3 more than MPa.
2, PE modified nano-graphite particle is adopted, in modified nano graphite particle, graphite form becomes vermiform, more be conducive to improving the percentage of grafting with polyethylene, polystyrene in polymer melt, improve the tensile strength of cystose, this is also the reason of tensile results than usual cystose tensile strength raising more than 2-3 times of material of the present invention.
3, temperature 180-230 DEG C, under the condition of pressure 20-35MPa, supercritical carbon dioxide fluid (without any modification, additive) is filled in the polymer melt of melting, supercritical carbon dioxide fluid and Mixing of Polymer Melt evenly, supercritical carbon dioxide fluid undergoes phase transition in high temperature environments, absorb the heat of a large amount of melt, after making 2nd district of No. two forcing machines, operation cooling temperature is achieved, and achieves cryogenic high pressure calendering process simultaneously.
4, product expressing technique of the present invention adopts that the pressure of whole process pressure control temperature control (adopting totally-enclosed oil circuit lower the temperature), mechanical dynamic is mixing to interact with static mixing, realize steady step-down, the use of modified nano graphite particle effectively increases the friction resistance of polymer melt at extrusion, realizes high pressure expressing technique.
5, stop pressure valve without any in extrusion technique, have employed twin-screw extruder and mixing barrier homogenizing; Be provided with cooling oil path in the screw rod of this processing unit, cooling efficiency is high, and the first twin screw extruder and the second screw extrusion press adopt its screw rod to coordinate for closely dynamic with inwall simultaneously, and gap is less than 0.05 millimeter, thus achieves pressurized melt self damping.
6, the present invention starts the decompression step by step technique of employing from the second ultra-high voltage forcing machine, supercritical carbon dioxide fluid and Mixing of Polymer Melt and degree of transformation is made to obtain the control result of hope, the nano-graphite particle of modification effectively increases cystose die head and extrudes resistance, under 7-12MPa pressure, melt extrusion expands and discharges (barometric point 1MPa), obtain less evenly foam diameter (be less than 50um, major part bubble is less than 5 um), abscess circularity is even, is closed pore substantially.Carbon dioxide is full of in bubble.Utilize carbon dioxide (0.016W/(mK)) than air (0.029W/(mK)) and the characteristic of the less thermal conductivity of other foamed gas, carbonic acid gas itself has extinguishing property simultaneously, the foam board oxygen index produced when not mixing any fire retardant can reach more than 30%, availability is more excellent, environmental friendliness, thermal conductivity less (0.022 W/(mK can be less than)) lagging material.The product that heat-insulating property is more excellent can be obtained.
7, be not suitable for can hair style polymer beads for expressing technique of the present invention, and is applicable to the polymkeric substance and the mixture that do not add any whipping agent, the product processes of rear high pressure filling whipping agent.Described polymkeric substance is the pure organic high molecular compound without any additive and whipping agent.
8, utilize and produce supercritical carbon dioxide fluid product of the present invention with production from waste gas, the most direct mode of inherently energy-saving and emission-reduction, environmental friendliness.Working method of the present invention adopts cleaner production recycle, especially adopts Liquid carbon dioxide phase transformation foam process, without useless environmental protection, is beneficial to reduction of discharging; Product of the present invention itself is energy-conserving product, and energy-saving effect is best.
9, product of the present invention is not containing fluorine-containing and synthetic foam material, more not containing whipping agents such as 1,1,2,2-Tetrafluoroethane (HFC-134), pentane and freonll-11, and environmental friendliness, harmless to atmospheric layer.
10, die head high pressure (7-12MPa) expands and discharges, and heat up the viscosity improving solution and toughness simultaneously, and the bubble of formation expands more freely while relief pressure.Because extrusion temperature is higher than usual technological temperature, the guarantee of walls toughness and ductility, obtains higher unicellular structure.Achieve the dimensional stability that sheet material is excellent.
11, the present invention and expandable polystyrene particle cystose performance index contrast:
Product performance index of the present invention:
(1), ultimate compression strength >=250-650kPa;
(2), water-intake rate≤0.5%;
(3), dimensional stability≤0.3%;
(4), density≤32kg/m 3;
(5), rate of closed hole >=98%;
(6), thermal conductivity≤0.022 w/(mK);
, burning classification B1 level, oxygen index >=30%;
(8), tensile strength >=300 kPa;
(9), water vapor permeability coefficient≤3.5(ng/Pa.m.s);
Sheet material heat conducting coefficient of the present invention is less than or equal to≤0.022 W/(mK), can obtain less thermal conductivity (0.018 W/(mK)), be better than current domestic rigid foam product.
12, formula mixture of the present invention through fusing, High Temperature High Pressure mixing after, 25MPa high pressure inject supercritical carbon dioxide fluid, low temperature 45 ± 5 DEG C (usual technique 70-100 DEG C) 15MPa pressure (usual technique is less than 10MPa) disperses tonality.Supercritical carbon dioxide fluid undergoes phase transition in polymer melt, makes bubble, utilizes the heat absorption capacity of carbonic acid gas phase transformation, realizes the mixing dispersion tonality of low temperature.Supercritical carbon dioxide fluid extracts carbon dioxide from air, and height is pressed into.
Supercritical carbon dioxide fluid foams, high pressure is mixing, cryogenic high pressure dispersion tonality, high pressure-temperature discharge and extrude, high performance syntactic foam heat preservation plate material is made through cutting ageing, meet Passive low-energy green building standard-required, and it is cheap, be only polyurethane thermal insulation board, phenolic-aldehyde heat-insulation board 1/3rd, performance index are better than existing market product 1/3.
Embodiment
embodiment 1
A kind of GPES rigid foam composite plastic warming plate, it comprises following component by weight: modified nano graphite particle 8 parts, polyethylene 5 parts (as Yanshan Petrochemical 5200B), polystyrene 85 parts (as Yanshan Petrochemical 666D), glyceryl monostearate 0.05 part, supercritical carbon dioxide fluid 3.5 parts.Supercritical carbon dioxide fluid is by obtained in process gas, then is pressurized to the obtained product of 8MPa through high-pressure pump, selects the canned liquid product that the long body company limited of relaxing one's efforts in Chengyang, Qingdao produces.
The described nano-graphite particle through surface physics modification is mixing by the Nano graphite powder 75 parts of 0.8um-38um continuous particulate grating and polyethylene 25 parts of compounds, by singe screw mixing roll 150 ± 5 DEG C, under 4MPa pressure condition, extrude the obtained diameter of cooling and be less than the circular or cylindrical particle of 2mm.
A manufacture method for GPES rigid foam composite plastic warming plate, is characterized in that it comprises the steps:
(1) by polystyrene 85 parts, polyethylene 5 parts, mix mixture is for subsequent use through the nano-graphite particle 8 parts of surface physics modification, glyceryl monostearate 0.05 part;
(2) added by mixture in the first twin screw extruder, the work area in the first twin screw extruder is divided into seven sections:
First to the 3rd section is intensification melt zone, wherein the first zone temperatures 130 DEG C; Second section 160 DEG C; 3rd section 190 DEG C, pressure 4MPa;
4th to the 5th section is that melting is pressurizeed mixing district, the 4th zone temperatures 210 DEG C, pressure 8 MPa; 5th zone temperatures 215 ± 5 DEG C, pressure 12-15 MPa;
Six to SECTOR-SEVEN section is the mixing district of high pressure-temperature.6th zone temperatures 230 ± 5 DEG C, pressure 20-25 MPa, SECTOR-SEVEN section high pressure-temperature mixing district temperature 215 ± 5 DEG C, pressure P 1:25-35 MPa; Obtain the polymer melt of melting;
(3) carbonic acid gas metering injected system (German LEWA brand: EH3-M210 type three METERING DIAPHRAGM PUMPS and E+H brand 83A04 type mass flowmeter combined system is adopted, its operating pressure 40 MPa) supercritical carbon dioxide fluid of weight part 3.5 parts is filled in the polymer melt of melting at the first forcing machine SECTOR-SEVEN end, filling pressure P 1+1MPa;
Supercritical carbon dioxide fluid mass rate control accuracy is less than ± and 0.5%.
(4) homogenizing and transition: this section is cooling area, temperature is by 215 DEG C, and pressure P 1:25-35 MPa drops to 200 ± 5 DEG C, pressure 22MPa; Homogenizing barrier and trumpet type releasing tube is provided with between first twin screw extruder outlet and the second screw extrusion press the 9th section, the polymer melt of melting feeds the 9th section of the second screw extrusion press by homogenizing barrier and trumpet type releasing tube, the polymer melt of 60% directly enters the 9th section of the second screw extrusion press, advances through screw extruding; Rest part polymer melt enters the front end of Section Eight section by the melt squeezing passage between the second screw extrusion press the 9th section and Section Eight section, after enter the 9th section by the screw extruding of Section Eight section, realize part mixing.
First, second screw extrusion press that this programme adopts, its screw rod and inwall are closely dynamic cooperation, and gap is less than 0.05 millimeter.
(5) second screw extrusion presss are divided into five sections, are Section Eight Duan Zhi Twelve-section respectively.The model of employing Tianjin Tian De rubber and plastics machine company limited is: CO 2-75X2/200 forcing machine.
Section Eight section, the 9th section, the tenth section are cooling decompression district; Section Eight section temperature 160 ± 5 DEG C, 18MPa, the 9th zone temperatures 80 ± 5 DEG C, 22MPa, the tenth zone temperatures 60 ± 5 DEG C, 18MPa;
11 zone temperatures 45 ± 5 DEG C, pressure 15MPa; Under this parameter, carry out mechanical dynamic mixing, the cooling oil path simultaneously by arranging in screw rod is forced and is realized rapidly cooling;
Twelve-section, temperature 90 ± 5 DEG C, under pressure 11Mpa environment, carries out static state by the homogenizing lattice coral being arranged at Twelve-section mixing;
(6) extrusion step: install extrusion die at Twelve-section end, die head is warming up to 100 ± 5 DEG C, expansion relief pressure 7-12MPa;
(7) sheet material shaping cutting step.
The sheet material shaping cutting production line that sheet material shaping cutting step adopts Tianjin Tian De rubber and plastics machine company limited to produce, production line comprises pair roller pressing unit, traction cooling and shaping device, machine automatization cutting unit.Obtained GPES rigid foam composite plastic warming plate.The specification of GPES rigid foam composite plastic warming plate can cut.Extrusion board width can be different according to extruding bistrique model, are divided into 600mm---1200mm.
Production technique is 30 minutes from being dosed into the extrusion board time, and ejecting plate speed is greater than 3m/min, and production efficiency is high.
The cystose performance index produced:
(1), ultimate compression strength: 325kPa.
(2), water-intake rate: 0.5%.
(3), dimensional stability: 0.3%.
(4), density: 31.6kg/m 3.
(5), rate of closed hole: 98%.
(6), thermal conductivity: 0.0216 w/(mK).
(7), burning classification B1 level.Oxygen index: 31.8%.
(8), tensile strength: 405 kPa.
(9), water vapor permeability coefficient: 1.62(ng/Pa.m.s).
GPES rigid foam composite plastic warming plate is used for insulation, its thermal conductivity 0.022 is EPS(>=0.033), XPS(0.030) 2/3, insulation layer thickness is only EPS(>=0.033), XPS(0.030) 2/3, save 1/3, energy-saving and emission-reduction, environmental friendliness.
embodiment 2
The present embodiment and embodiment 1 something in common repeat no more, and difference is polystyrene 92 parts, modified nano graphite particle 3 parts, polyethylene 3 parts.
The cystose performance index produced:
(1), ultimate compression strength: 265kPa.
(2), water-intake rate: 0.62%.
(3), dimensional stability: 0.7%.
(4), density: 36.4kg/m 3.
(5), rate of closed hole: 92%;
(6), thermal conductivity: 0.028 w/(mK).
(7), burning classification B1 level.Oxygen index: 30.2%
(8), tensile strength: 285kPa
(9), water vapor permeability coefficient: 1.85(ng/Pa.m.s).
When modified nano graphite particle volume is lower than 3 parts, extrusion pressure, less than 6MPa, does not meet production requirement; When polyethylene admixture weight part is 3 parts or less, thermal conductivity extrusion board bubble diameter becomes large, and bubble diameter is greater than 0.1mm, thermal conductivity and usual sheet material close, DeGrain.
embodiment 3:
The present embodiment and embodiment 1 something in common repeat no more, and difference is polystyrene 88 parts, part modified nano graphite particle 6 parts, polyethylene 4 parts.
The cystose performance index produced:
(1), ultimate compression strength: 286kPa.
(2), water-intake rate: 0.48%.
(3), dimensional stability: 0.28%.
(4), density: 31.9kg/m 3.
(5), rate of closed hole: 98%.
(6), thermal conductivity: 0.022 w/(mK).
(7), burning classification B1 level.Oxygen index: 30.8%
(8), tensile strength: 345 kPa.
(9), water vapor permeability coefficient: 1.79(ng/Pa.m.s).
Above-mentioned foam board performance meets the optimum index request of the present invention, and dimensional stability, thermal conductivity, water-intake rate all reach optimum index, and combustionproperty also meets the requirement of B1 level.And the adhesiveproperties of cystose and external wall outer insulation polymer mortar also meets the requirement of external thermal insulation system.
embodiment 4:
The present embodiment and embodiment 1 something in common repeat no more, and difference is, polystyrene 83 parts, modified nano graphite particle 9 parts, polyethylene 6 parts.
The cystose performance index produced:
(1), ultimate compression strength: 415kPa.
(2), water-intake rate: 0.50%.
(3), dimensional stability: 0.31%.
(4), density: 31.8kg/m 3.
(5), rate of closed hole: 98%;
(6), thermal conductivity: 0.0219 w/(mK).
(7), burning classification B1 level.Oxygen index: 30.2%.
(8), tensile strength: 306kPa.
(9), water vapor permeability coefficient: 1.72(ng/Pa.m.s).
The present embodiment gained cystose property indices also meets the optimum index request of the present invention, but along with the increase of amount of polyethylene, ultimate compression strength increases; Along with the increase tensile strength of graphite granule amount reduces, although the adhesiveproperties of cystose and external wall outer insulation polymer mortar meets the requirement of external thermal insulation system, but compared with embodiment 1, embodiment 3, bonding tensile strength has been reduced to the lower bound of external thermal insulation system requirement.
embodiment 5:
The present embodiment and embodiment 1 something in common repeat no more, and difference is polystyrene 80 parts, modified nano graphite particle 11 parts, polyethylene 7 parts.
The cystose performance index produced:
(1), ultimate compression strength: 568kPa.
(2), water-intake rate: 0.36%.
(3), dimensional stability: 0.7%.
(4), density: 34.8kg/m 3.
(5), rate of closed hole: 88%.
(6), thermal conductivity: 0.0335 w/(mK).
(7), burning classification B1 level.Oxygen index: 23.0%.
(8), tensile strength: 256 kPa.
(9), water vapor permeability coefficient: 2.80(ng/Pa.m.s).
The optimum index request of foam board performance index compound the present invention.
After modified nano graphite particle mixes weight part 11 parts, extrusion pressure reduces to about 3MPa, and the sell of one's property of cystose dimensional stability is poor; Burning smoke density increases, and oxygen index is reduced to and is less than 23.0%, and burning classification B1 level is defective.Especially thermal conductivity increases, and when addition content 12 parts, thermal conductivity increases to 0.0465, along with modified nano graphite particle volume increases, and the increase trend linearly ascendant trend of thermal conductivity.
When polyethylene admixture weight part is 7 parts or more, there is fibrosis phenomenon in plate surface, and thermal conductivity becomes large, and dimensional stability is deteriorated simultaneously, has buckling phenomenon; Combustionproperty reduces.
Along with the increase of modified nano graphite particle volume, there is attachment Graphite Powder 99 phenomenon in cystose surface, cystose obviously reduces with the bonding tensile strength of external wall outer insulation polymer mortar, when admixture or more than 11 parts, bonding tensile strength is lower than 0.10 MPa, destroy interface all at bonding interface, do not meet the requirement of external wall outer insulation.

Claims (10)

1. a GPES rigid foam composite plastic warming plate, it comprises following component by weight: polystyrene 80 parts-92 parts, polyethylene 3 parts-7 parts, the nano-graphite particle 3 parts-11 parts through surface physics modification, glyceryl monostearate 0.04-0.06 part, through 130 DEG C of-160 DEG C of meltings after said components mixing, again through 190 DEG C-230 DEG C, mixing process under 4MPa--25 MPa pressure, bet into supercritical carbon dioxide fluid 2-4 part at the SECTOR-SEVEN section end of the first forcing machine at 25-35 MPa pressure, trumpet type releasing tube through homogenizing and transition feeds the second screw extrusion press, again through the second screw extrusion press from 160 to 45 DEG C of transition, the mixing dispersion tonality mixing with static state of mechanical dynamic under the condition of 22 to 11MPa changes, at 7-12MPa, after under 100 ± 5 DEG C of conditions, release is extruded, GPES rigid foam composite plastic warming plate is produced in compacting.
2. GPES rigid foam composite plastic warming plate according to claim 1, is characterized in that supercritical carbon dioxide fluid is extracted from air by producing carbon dioxide machine, more obtained through high-pressure pump pressurization.
3. GPES rigid foam composite plastic warming plate according to claim 1, it is characterized in that the described nano-graphite particle through surface physics modification is mixing by the Nano graphite powder 70 parts-80 parts of 0.8um-38um continuous particulate grating and polyethylene 20 parts of-30 parts of compounds, by singe screw mixing roll 150 ± 5 DEG C, under 4MPa pressure condition, extrude the obtained diameter of cooling and be less than the circular or cylindrical particle of 2mm.
4. GPES rigid foam composite plastic warming plate according to claim 1, is characterized in that modified nano graphite particle 6 parts-9 parts, polyethylene 4-5 part, polystyrene 84 parts-88 parts, glyceryl monostearate 0.05 part, supercritical carbon dioxide fluid 3.5 parts.
5. GPES rigid foam composite plastic warming plate according to claim 1, is characterized in that also comprising 0.1 part of titanium dioxide.
6. GPES rigid foam composite plastic warming plate according to claim 1, is characterized in that also comprising: Ke Laien 3 parts-4 parts.
7. a manufacture method for GPES rigid foam composite plastic warming plate, is characterized in that it comprises the steps:
(1) by polystyrene 80 parts-92 parts, polyethylene 3 parts-7 parts, the nano-graphite particle 3 parts-11 parts through surface physics modification, glyceryl monostearate 0.04-0.06 part; Mix mixture is for subsequent use;
(2) added by mixture in the first twin screw extruder, the work area in the first twin screw extruder is divided into seven sections:
First to the 3rd section is intensification melt zone, wherein the first zone temperatures 130 DEG C; Second section 160 DEG C; 3rd section 190 DEG C, pressure 4MPa;
4th to the 5th section is that melting is pressurizeed mixing district, the 4th zone temperatures 210 DEG C, pressure 8 MPa; 5th zone temperatures 215 ± 5 DEG C, pressure 12-15 MPa;
Six to SECTOR-SEVEN section is the mixing district of high pressure-temperature;
6th zone temperatures 230 ± 5 DEG C, pressure 20-25 MPa, SECTOR-SEVEN section high pressure-temperature mixing district temperature 215 ± 5 DEG C, pressure P 1:25-35 MPa; Obtain the polymer melt of melting;
(3) high-pressure pump is adopted to be filled in the polymer melt of melting by the supercritical carbon dioxide fluid of weight part 2-4 part at the first forcing machine SECTOR-SEVEN end, filling pressure P 1+1MPa;
Supercritical carbon dioxide fluid mass rate control accuracy is ± 0.5%;
(4) homogenizing and transition: this section is cooling area, temperature is by 215 DEG C of MPa, and pressure P 1:25-35 MPa drops to 200 ± 5 DEG C, pressure 22MPa; Homogenizing barrier and trumpet type releasing tube is provided with between first twin screw extruder outlet and the second screw extrusion press the 9th section, the polymer melt of melting feeds the 9th section of the second screw extrusion press by homogenizing barrier and trumpet type releasing tube, the polymer melt of 60% directly enters the 9th section of the second screw extrusion press, advances through screw extruding; Rest part polymer melt enters the front end of Section Eight section by the melt squeezing passage between the second screw extrusion press the 9th section and Section Eight section, after enter the 9th section by the screw extruding of Section Eight section, realize part mixing;
(5) second screw extrusion presss are divided into five sections, are Section Eight Duan Zhi Twelve-section respectively;
Section Eight section, the 9th section, the tenth section are cooling decompression district; Section Eight section temperature 160 ± 5 DEG C, 18MPa, the 9th zone temperatures 80 ± 5 DEG C, 22MPa, the tenth zone temperatures 60 ± 5 DEG C, 18MPa;
11 zone temperatures 45 ± 5 DEG C, pressure 15MPa; Under this parameter, carry out mechanical dynamic mixing, the cooling oil path simultaneously by arranging in screw rod is forced and is realized rapidly cooling;
Twelve-section, temperature 90 ± 5 DEG C, under pressure 11Mpa environment, carries out static state by the homogenizing lattice coral being arranged at Twelve-section mixing;
(6) extrusion step: install extrusion die at Twelve-section end, die head is warming up to 100 ± 5 DEG C, expansion relief pressure 7-12MPa;
(7) sheet material shaping cutting step.
8. the manufacture method of GPES rigid foam composite plastic warming plate according to claim 7, it is characterized in that sheet material shaping cutting step adopts sheet material shaping cutting production line, production line comprises pair roller pressing unit, traction cooling and shaping device and machine automatization cutting unit.
9. the manufacture method of GPES rigid foam composite plastic warming plate according to claim 7, it is characterized in that mixture adopts material bucket type electronic proportioning metering system intermittent type batching, within every 5 minutes, complete Primary batching system, after be discharged into feeding surge bunker continuous flow rate, Measuring Precision ± 0.1%.
10. the manufacture method of GPES rigid foam composite plastic warming plate according to claim 7, it is characterized in that the first twin screw extruder adopts the double helix exrusion envelope material of round sealed, pitch is provided with cooling oil path.
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CN107746564A (en) * 2017-09-22 2018-03-02 山东汇星科技开发有限公司 A kind of GPES composite plastics warming plate and its preparation technology
CN108676268A (en) * 2018-05-02 2018-10-19 山东汇星科技开发有限公司 Fire prevention GPES rigid foam composite plastic thermal insulation boards and preparation method thereof
CN108864468A (en) * 2018-05-30 2018-11-23 天津斯坦利新型材料有限公司 Expandable polystyrene material and its preparation method and application
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CN107746564A (en) * 2017-09-22 2018-03-02 山东汇星科技开发有限公司 A kind of GPES composite plastics warming plate and its preparation technology
CN108676268A (en) * 2018-05-02 2018-10-19 山东汇星科技开发有限公司 Fire prevention GPES rigid foam composite plastic thermal insulation boards and preparation method thereof
CN108864468A (en) * 2018-05-30 2018-11-23 天津斯坦利新型材料有限公司 Expandable polystyrene material and its preparation method and application
CN108864468B (en) * 2018-05-30 2021-10-26 天津斯坦利新型材料有限公司 Expandable polystyrene material and preparation method and application thereof
CN109370082A (en) * 2018-10-24 2019-02-22 山东创伟外墙保温材料集团有限公司 One kind receives plastic insulation board and its manufacturing method
CN111234402A (en) * 2020-02-24 2020-06-05 山东省建筑科学研究院有限公司 Rigid foam composite plastic micro-bubble plate and manufacturing method thereof
CN111234402B (en) * 2020-02-24 2022-05-27 山东省建筑科学研究院有限公司 Rigid foam composite plastic micro-bubble plate and manufacturing method thereof
CN113024961A (en) * 2020-12-25 2021-06-25 山东鹏彩环保科技有限公司 Nano-graphite extrusion molding insulation board and preparation process and device thereof
CN113088011A (en) * 2021-04-07 2021-07-09 日照德丰节能材料有限公司 Composite interface microporous plate and preparation method thereof

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