CN103243878A - High-strength, high-insulation exterior wall heat-preservation face brick compounded by aluminum plastic and nanometer materials - Google Patents
High-strength, high-insulation exterior wall heat-preservation face brick compounded by aluminum plastic and nanometer materials Download PDFInfo
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Abstract
The invention provides an exterior wall heat-preservation face brick compounded by aluminum plastic and nanometer materials, belongs to the technical field of building materials, and particularly relates to the nanometer materials in application of building an exterior face wall heat-preservation system. The face brick is composed of an outer aluminum plate or aluminum-plastic plate layer, an adhesive layer and a basement heat-preservation layer made of inorganic lightweight materials mixed with nano-particles. The method for producing the face brick includes adding and uniformly mixing the nanometer materials with particle sizes at the nanoscale in a mixed system of cement, auxiliary cementing materials, high polymer adhesives, the inorganic lightweight materials, fibers and water, and pressurizing and molding the mixed system prior to being cross-linked by high polymer materials and hydration drying of the cement, adding the adhesive layer having adhesive function in the basement heat-preservation layer, and adhering the aluminum plate or aluminum-plastic plate to the adhesive layer. With the method, the exterior wall heat-preservation face brick is excellent in fireproof performance, high in crush resistance, tensile strength and adhesive strength and good in heat-preservation effect, and has very good decorative effect.
Description
Technical field
Present technique belongs to building material field, the particularly application of nano material in the building exterior wall heat preserving system.
Background technology
The development energy saving building is the important channel that solves resource, energy problem.Be example with China, in state-owned 44,000,000,000 square metres of existing buildings, energy consumption is generally higher.Architectural energy consumption generally accounts for 30% of the total power consumption of society, adds the consumption of constructional materials manufacturing process, and total accounting that consumes energy then reaches 46% to 47% in society.Wherein, the European countries that the construction unit area heating energy consumption of northern area is more close than weather conditions are high 1.5 to 2 times, because of the building energy consumption height, only the regional annual just many consumption standard coals of northern heating are several hundred million tons, more seriously, in the middle of every year nearly 2,000,000,000 square metres completed floor space, have only five, 60,000,000 square metres to be energy saving building, only account for about 3%, that is to say that 97% belongs to the highly energy-consuming building.According to present building energy consumption level development, to the year two thousand twenty, China's building energy consumption will reach 10.89 hundred million tons of standard coals.Relatively China and foreign countries' building energy consumption difference can be found, it is better that developed country builds the heat insulation effect of common building, at body of wall heat insulation layer efficiently arranged, and heat is difficult for transmitting inside and outside building.In recent years, for the needs of energy-saving and emission-reduction, China has formulated a series of code of building energy efficiency, requires new building must reach energy conservation standard, and externally body of wall must carry out outer insulation processing.External-wall heat-insulation material also must have following a few specific character except requiring outstanding heat insulation effect: 1, be non-inflammable thing, and satisfy the fire-fighting requirement.2, enough intensity is arranged, guarantee to resist the effect of various external force and internal force safely at work progress and building length of life.Application number is 200810052086.7,03140404.9 Deng patent report with the external wall insulation of foaming polymer material preparation, heat insulation effect is good, but because being main thermal insulation material with organic polymer, very easily burning also fails to make its flammability that the change of an essence is arranged even add fire retardant.Two massive losses that big fire causes of the big fire of Beijing CCTV and Jing'an District, Shanghai, it is enough prudent to remind people must have the use of organic external-wall heat-insulation material.Inorganic external-wall heat-insulation material has well solved the easy firing problem of organic external-wall heat-insulation material, most of standards that can reach A level fire protection flame retarding.But the common density of inorganic external-wall heat-insulation material is bigger, the coefficient of thermal conductivity height, and heat-insulating property has to be strengthened.For improving the heat-insulating property of inorganic external-wall heat-insulation material; reduce coefficient of thermal conductivity; usual method is for reducing the apparent density (apparent unit weight) of inorganic external-wall heat-insulation material; added light heat insulation material; be 201110168767.1 as application number; 200710304328.2 adopted foamed concrete or foaming magnesium chloride etc. to be that heat insulating material, other method adopt the low-density heat insulating material etc. patent, as materials such as asbestos, glass bead, haydite, vermiculite, expanded perlites.These material porous thermal conductive coefficients are lower, are the method insulation that 201110027771.6,200610012729.6 grades have taked to add glass bead as application number.But, these material porous, intensity is lower, with present production technology, the external wall insulation/brick intensity of making of these materials is corresponding lower, can not satisfy requirement of engineering, easily produce potential safety hazard again, for improving its intensity, need to add excessive cementitious material and supplementary cementitious material, can increase its coefficient of thermal conductivity widely again.
Summary of the invention
The objective of the invention is: when the substrate insulation layer of preparation exterior-wall heat insulation face brick, add nano material, it is carried out modification, to improve its resistance to compression, cracking resistance, shear strength and adhesive strength, utilize aluminium or plastic-aluminum combined sheet material to decorate as its external surface simultaneously, produce plastic-aluminum and compound high strength, the high adiabatic exterior-wall heat insulation face brick of nano material that the substrate insulation layer contains nano material.
Technical scheme of the present invention is: make the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum and nano material, it is characterized in that being made of aluminium or aluminium-plastic panel skin, adhesive linkage and the inorganic lightweight material substrate insulation layer that added nano particle.Add nano material it is carried out modification, improved resistance to compression, cracking resistance, shear strength and adhesive strength.Wherein aluminium or aluminium-plastic panel skin are in the external surface of exterior-wall heat insulation face brick, and adhesive linkage will play bonding and levelling effect, and aluminium or aluminium-plastic panel and the inorganic lightweight material substrate insulation layer that added nano particle are bonded together.
When preparing the substrate insulation layer of the compound exterior-wall heat insulation face brick of plastic-aluminum and nano material, add nano material, exterior wall inorganic heat preservation face brick substrate insulation layer is carried out modification, be conducive to improve resistance to compression, cracking resistance, shear strength and adhesive strength, thereby produce plastic-aluminum and the compound exterior-wall heat insulation face brick of nano material.The main preparation technology of thermal-insulating face tile substrate insulation layer adds also evenly to mix particle diameter in nano level nano material in the mixed system of cement, supplementary cementitious material, polymer binder, inorganic light weight thermal insulation material, fiber and water, and mixed system is through extrusion forming.The moulding of exterior wall inorganic heat preservation face brick substrate insulation layer by high-molecular organic material cross-linking process and hydrated cementitious dry run the exterior-wall heat insulation face brick.At above-mentioned prescription, for reducing cement consumption, increase workability, add water reducing agent in the preparation.For accelerating cement initial set speed, improve early strength, the reduction of erection time can add an amount of early strength admixture.
The number average bead diameter of nano material should be below 150nm, be preferably in below the 80nm, addition can account for 0.1% to 25% of gross weight, and nano material includes but not limited to one or more mixtures in the following nano material: nano-calcium carbonate calcium powder, nano titanium dioxide powder, nano-silica powder end, nano-bentonite powder, nanometer flyash powder, nano kaoline powder, nano-calcium carbonate magnesium dust, nano oxidized magnesium dust, nano barium sulfate particulate, nanometer bonding agent particulate, nano oxidized iron granules, nano aluminium oxide particulate and nanometer calcium silicates particulate.
At the cement described in the above-mentioned prescription can be but be not limited to a kind of or their two kinds and two or more mixture such as portland cement, sulphate aluminium cement, perhafnate cement, ferrous aluminate cement, white cement.
At the supplementary cementitious material described in the above-mentioned prescription can be but be not limited to agstone, natural volcanic ash, flyash, silicon ash, slag powders and phosphorus slag powder.
Addition at the polymer binder described in the above-mentioned prescription can be between 0.05% to 3%, polymer binder can be but be not limited to polyvinyl alcohol, polyvinyl ester, the modification polyethylene glycol oxide, the polyethylene acid esters, poly-fluorocarbon resin, polystyrene, polyacrylic acid, polyacrylate, polyacrylate, benzene emulsion, HPMA, the poly ester, polyvinyl chloride, ethene/vinyl laurate/vinyl chloride ternary polymerization rubber powder, ethene acetate/ethene bipolymer, starch and oxidized starch, starch ether, carboxylated cellulose, the hydroxylating cellulose, can be they one or more mixture or its connect skill, copolymer.Its form can be resin, can disperse micelle, emulsion, suspension, emulsion or solution.
Should be at 200kg/m in the inorganic light weight thermal insulation material apparent density described in the above-mentioned prescription
3Below, can be but be not limited to glass bead that hollow haydite, expanded vermiculite, expanded perlite, Hollow Glass Sphere can be their two or more mixtures.
Be preferably in below the 0.1mm at the fibre diameter described in the above-mentioned prescription, length is preferably in below the 70mm, can be but be not limited to organic synthesis macromolecular fibre such as nylon fiber, polypropylene fibre, polyester fiber, propionitrile fiber, Fypro, polycarbonate and natural polymer subbundle such as paper pulp fiber, wood pulp cellulose, tangerine rod fibers, viscose rayon, flaxen fiber, protein fibre and cutin fiber.Can be single fiber, also can be the mixture of two or more fiber.
The consumption of water reducing agent is less than 1%, can be but be not limited to high-efficiency water-reducing agent of poly-carboxylic acid, sodium lignin sulfonate, benzene sulfonate formaldehyde condensation products, polycyclic aromatic hydrocarbon sulfonate formaldehyde condensation products, melamine sulfonate and formaldehyde condensation polymer, sulfonated polystyrene, maleic acid sulfonate polyoxyethylene ester, polyalcohol sulfonate and oxirane and epoxy propane copolymer, alpha-sulfonated fatty acid polyoxyethylene ester etc., also can be the mixture of two or more water reducing agent.
Early strength admixture is used for shortening the initial setting time, improve early strength, can be but be not limited to calcium chloride, sodium chloride, potassium chloride, aluminium chloride, sodium formate, natrium nitrosum, sodium carbonate, gypsum, can be early strength water-reducing agent, also can be the mixture of two or more early strength admixture.
Be fixing compound high strength, the high adiabatic exterior-wall heat insulation face brick of plastic-aluminum and nano material, can reserve two or more anchor holes at brick, in order to before bonding material works that thermal-insulating face tile is fixing on the wall in work progress.
For strengthening the waterproof moisture-proof effect of the compound high strength of plastic-aluminum of the present invention and nano material, high adiabatic exterior-wall heat insulation face brick, can coat waterproof coating at the external surface of brick.Waterproof coating uses and includes but not limited to waterproofing agent of organosilicon.
Use the present invention, not only can prepare high strength, high adiabatic plastic-aluminum and the compound exterior-wall heat insulation face brick of nano material, can also make inorganic heat preservation panel, inorganic exterior-wall heat insulation mortar.
Below be to represent that to the testing result of embodiment 1 and with diagram detection method is reference standard method GB/T 5486, JGJ 144, JG 149 and GB/T 10294 respectively.
Fig. 1 is the raising along with the nanoparticle addition, the variation of exterior wall inorganic heat preservation face brick substrate insulation layer compressive strength.In exterior wall inorganic heat preservation face brick substrate insulation layer, by embodiment 1 formulation (but not adding nanoparticle), compressive strength is 0.171MPa, and when improving the percentage by weight of nano-calcium carbonate particles gradually, exterior wall inorganic heat preservation face brick substrate insulation layer compressive strength increases substantially.
Fig. 2 is the raising along with the nanoparticle addition, the change of exterior wall inorganic heat preservation face brick substrate insulation layer tensile strength.In exterior wall inorganic heat preservation face brick substrate insulation layer, by embodiment 1 formulation (but not adding nanoparticle), tensile strength is 0.171MPa, and when improving the percentage by weight of nano-calcium carbonate particles gradually, exterior wall inorganic heat preservation face brick substrate insulation layer tensile strength increases substantially.
Fig. 3 is the raising along with the nanoparticle addition, the change (MPa) of the tensile bond strength between exterior wall inorganic heat preservation face brick substrate insulation layer and the cement mortar, (the destruction face is on the foam cement plate).In exterior wall inorganic heat preservation face brick substrate insulation layer, by embodiment 1 formulation (but not adding nanoparticle), tensile strength is 0.153MPa, and when improving the percentage by weight of nano-calcium carbonate particles gradually, exterior wall inorganic heat preservation face brick substrate insulation layer tensile bond strength increases substantially.
Fig. 4 is the raising along with the nanoparticle addition, and the variation of exterior wall inorganic heat preservation face brick substrate insulation layer coefficient of thermal conductivity is as seen, along with the increase of nanoparticle, very little to the influence of coefficient of thermal conductivity.
To embodiment 2,3,4 testing result shows that along with the increase of nanoparticle, variation tendency and the embodiment 1 of exterior wall inorganic heat preservation face brick substrate insulation layer compressive strength, tensile strength, adhesive strength and the coefficient of thermal conductivity of obtaining are in full accord.
The present invention's beneficial effect compared with the prior art is that the present invention adds nanoparticle to increase the uniformity of material, reduces the generation in crack, improves its mechanical strength.This is the hole in both shutoff cement mortar or the concrete because nanoparticle and polymer cooperatively interact, and reduces the generation of water evaporates speed and quantity inhibition microfissure by passage.Simultaneously, because nanoparticle is very little, good flowability is arranged, nanoparticle can infiltrate between the microcrack and exist, even also can permeate nanoparticle between the flat crystal of calcium hydroxide.Because of the relative sliding of nanoparticle, need add and contain nanoparticle polymer film modulus of elasticity and become lower, can improve tensile strength and fracture toughness.Simultaneously, along with hydrated cementitious absorbs moisture, the polymer after the dehydration is gathered into the continuous net structure of three dimensions gradually with nanoparticle under alkali condition, and the kind net structure penetrates mutually hands over knot to be intertwined, and forms the basal body structure of densification continuously.This nanoparticle polymeric web membrane structure is passed pore, the crack in the external-wall heat-insulation material, by the connection of shuttling back and forth, forms a rubber-like spacial framework, has disperseed stress, has increased deformability.Even under the stress effect, produce the crack, because the polymer of having filled nanoparticle strides across the crackle connection of shuttling back and forth, can suppress the development of crackle, improved fracture toughness, deformability and the crack resistance of hardenite.In addition, between nanoparticle and hydrated cementitious product, may exist the interaction of hydrogen bond, Van der Waals force, because of the nanoparticle particle diameter little, surface area is huge, and special quantum effect is arranged, some active group in the nanoparticle also may with hydrated cementitious product generation chemical action, form special bridged bond effect, improve the structure of hydrated cementitious product, alleviate internal stress, thereby reduce the generation of micro-crack in the cement slurry.This structure is not only absorption, the bonding of physics, and exists the chemical action that exists with the chemical bond form.Thereby the hardened paste structure is produced favorable influence.
Description of drawings
Fig. 1 is the raising along with the nanoparticle addition, exterior wall inorganic heat preservation face brick substrate insulation layer compressive strength variation diagram.Abscissa is the percentage by weight (%) that nanoparticle accounts for whole exterior wall inorganic heat preservation face brick substrate insulation layer, and ordinate is its compressive strength (MPa).
Fig. 2 is the raising along with the nanoparticle addition, the variation diagram of exterior wall inorganic heat preservation face brick substrate insulation layer compressive strength.Abscissa is the percentage by weight (%) that nanoparticle accounts for whole exterior wall inorganic heat preservation face brick substrate insulation layer, and ordinate is its tensile strength (MPa).
Fig. 3 is the raising along with the nanoparticle addition, the variation (MPa) of exterior wall inorganic heat preservation face brick substrate insulation layer and cement mortar tensile bond strength.(the destruction face is on exterior wall inorganic heat preservation face brick substrate insulation layer).Abscissa is the percentage by weight (%) that nanoparticle accounts for whole exterior wall inorganic heat preservation face brick substrate insulation layer, and ordinate is its stretch-proof adhesion strength (MPa).
Fig. 4 is the raising along with the nanoparticle addition, the variation diagram of exterior wall inorganic heat preservation face brick substrate insulation layer coefficient of thermal conductivity.Abscissa is the percentage by weight (%) that nanoparticle accounts for whole exterior wall inorganic heat preservation face brick substrate insulation layer, and ordinate is its coefficient of thermal conductivity W/ (m*K).
The specific embodiment
Embodiment 3, white cement 950 grams, phosphorus slag powder 500 grams, polymer binder 50 grams, inorganic light weight thermal insulation material perlite 1250 grams, polyester fiber 3 grams, azelon 3 grams, polycyclic aromatic hydrocarbon sulfonate formaldehyde condensation products 2 grams, water is an amount of, add in the mixed system and evenly mix the maximum distribution particle diameter about 70 nanometers nano silicon dioxide particles 70 grams, mixed system will be reserved anchor hole through extrusion forming in pressing process.Forming materials is by high-molecular organic material cross-linking process and hydrated cementitious dry run, again by bonding leveling layer with aluminium or Aluminiumplastic composite panel be bonded on the substrate insulation layer plastic-aluminum and the compound exterior-wall heat insulation face brick of nano material, can coat the organic silicon water-proofing coating at the external surface of brick.
Claims (12)
1. a plastic-aluminum and the compound exterior-wall heat insulation face brick of nano material is characterized in that being made of aluminium or aluminium-plastic panel skin, adhesive linkage and the inorganic lightweight material substrate insulation layer that added nano particle.
2. according to a kind of plastic-aluminum and the compound exterior-wall heat insulation face brick of nano material of claim 1, it is characterized in that its substrate insulation layer by adding in the mixed system of cement, supplementary cementitious material, polymer binder, inorganic light weight thermal insulation material, fiber and water and evenly mixing particle diameter in nano level nano material, mixed system is through extrusion forming.Forming materials by high-molecular organic material cross-linking process and hydrated cementitious dry run reach the substrate insulation layer.
3. the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum according to claim 2 and nano material, the number average bead diameter that it is characterized in that the nano material of adding should be below 150nm, addition can account for 0.1% to 25% of gross weight, and nano material includes but not limited to following nano material or its mixture: the nano-calcium carbonate calcium powder, nano titanium dioxide powder, the nano-silica powder end, the nano-bentonite powder, the nanometer flyash powder, the nano kaoline powder, the nano-calcium carbonate magnesium dust, nano oxidized magnesium dust, the nano barium sulfate particulate, nanometer bonding agent particulate, nano oxidized iron granules, nano aluminium oxide particulate and nanometer calcium silicates particulate.
4. the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum according to claim 2 and nano material is characterized in that described cement can be but is not limited to a kind of or their two kinds and two or more mixture such as portland cement, sulphate aluminium cement, perhafnate cement, ferrous aluminate cement, white cement.
5. the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum according to claim 2 and nano material is characterized in that described supplementary cementitious material can be but is not limited to agstone, natural volcanic ash, flyash, silicon ash, slag powders and phosphorus slag powder.
6. the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum according to claim 2 and nano material, the addition that it is characterized in that described polymer binder can be between 0.05% to 5%, polymer binder can be but be not limited to polyvinyl alcohol, polyvinyl ester, the modification polyethylene glycol oxide, the polyethylene acid esters, poly-fluorocarbon resin, polystyrene, polyacrylic acid, polyacrylate, polyacrylate, benzene emulsion, HPMA, the poly ester, polyvinyl chloride, ethene/vinyl laurate/vinyl chloride ternary polymerization rubber powder, ethene acetate/ethene bipolymer, starch and oxidized starch, starch ether, carboxylated cellulose, the hydroxylating cellulose, can be they one or more mixture or its connect skill, copolymer.Its form can be resin, can disperse micelle, emulsion, suspension, emulsion or solution.
7. the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum according to claim 2 and nano material, the inorganic light weight thermal insulation material apparent density described in it is characterized in that filling a prescription is at 200kg/m
3Below, can be but be not limited to glass bead that hollow haydite, expanded vermiculite, expanded perlite, Hollow Glass Sphere can be their two or more mixtures.
8. the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum according to claim 2 and nano material, fibre diameter described in it is characterized in that filling a prescription is preferably in below the 0.1mm, length is preferably in below the 70mm, can be but be not limited to organic synthesis macromolecular fibre such as nylon fiber, polypropylene fibre, polyester fiber, propionitrile fiber, Fypro, polycarbonate and natural polymer subbundle such as paper pulp fiber, wood pulp cellulose, tangerine rod fibers, viscose rayon, flaxen fiber, protein fibre and cutin fiber.Can be single fiber, also can be the mixture of two or more fiber.
9. the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum according to claim 2 and nano material, the consumption of the water reducing agent described in it is characterized in that filling a prescription is less than 1%, can be but be not limited to high-efficiency water-reducing agent of poly-carboxylic acid, sodium lignin sulfonate, the benzene sulfonate formaldehyde condensation products, the polycyclic aromatic hydrocarbon sulfonate formaldehyde condensation products, the melamine sulfonate and formaldehyde condensation polymer, sulfonated polystyrene, maleic acid sulfonate polyoxyethylene ester, polyalcohol sulfonate and oxirane and epoxy propane copolymer, alpha-sulfonated fatty acid polyoxyethylene ester etc. also can be the mixtures of two or more water reducing agent.
10. the compound exterior-wall heat insulation face brick of a kind of plastic-aluminum according to claim 2 and nano material, early strength admixture described in it is characterized in that filling a prescription is used for shortening the initial setting time, improve early strength, can be but be not limited to calcium chloride, sodium chloride, potassium chloride, aluminium chloride, sodium formate, natrium nitrosum, sodium carbonate, the plaster of paris, can be early strength water-reducing agent, also can be the mixture of two or more early strength admixture.
11. the exterior-wall heat insulation face brick that a kind of plastic-aluminum according to claim 2 and nano material are compound is characterized in that the external surface of brick is coated waterproof coating.Waterproof coating uses and includes but not limited to waterproofing agent of organosilicon.
12. the exterior-wall heat insulation face brick that a kind of plastic-aluminum according to claim 1 and nano material are compound is characterized in that described aluminium or aluminium-plastic panel skin can be metallic aluminium, aluminium alloys, aluminium (aluminium alloys) plastic clad plate.
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| CN103664130A (en) * | 2013-11-18 | 2014-03-26 | 青岛文创科技有限公司 | Novel inorganic fiber energy-saving heat-insulating material |
| CN103833304A (en) * | 2014-01-14 | 2014-06-04 | 安徽盛仁新型建材有限公司 | Slag aerated brick and manufacturing method thereof |
| CN106219075A (en) * | 2016-09-28 | 2016-12-14 | 合肥海宝节能科技有限公司 | The insulating lining of energy-saving heat preserving case |
| CN106241069A (en) * | 2016-09-28 | 2016-12-21 | 合肥海宝节能科技有限公司 | Energy-saving heat preserving case |
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| CN103833304A (en) * | 2014-01-14 | 2014-06-04 | 安徽盛仁新型建材有限公司 | Slag aerated brick and manufacturing method thereof |
| CN107401264B (en) * | 2016-05-20 | 2019-02-12 | 刘友柱 | A kind of production technology of lightweight SGA green wallboard |
| CN107401264A (en) * | 2016-05-20 | 2017-11-28 | 刘友柱 | A kind of production technology of lightweight SGA green wallboards |
| CN106219075A (en) * | 2016-09-28 | 2016-12-14 | 合肥海宝节能科技有限公司 | The insulating lining of energy-saving heat preserving case |
| CN106241069A (en) * | 2016-09-28 | 2016-12-21 | 合肥海宝节能科技有限公司 | Energy-saving heat preserving case |
| CN106429035A (en) * | 2016-09-28 | 2017-02-22 | 合肥海宝节能科技有限公司 | Heat-insulation lining material |
| CN106426513A (en) * | 2016-09-28 | 2017-02-22 | 合肥海宝节能科技有限公司 | Manufacturing method of insulation liner of energy saving insulation box |
| CN106628653A (en) * | 2016-09-28 | 2017-05-10 | 合肥海宝节能科技有限公司 | Preparation method of thermal insulation lining material |
| CN108358661A (en) * | 2017-07-01 | 2018-08-03 | 太仓安托建筑材料有限公司 | A kind of light-weight environment-friendly construction material |
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| CN108638546A (en) * | 2018-01-25 | 2018-10-12 | 吉林省技祥新型材料有限公司 | A kind of preparation method of nano stone-plastic intelligent floor |
| CN108485567A (en) * | 2018-03-16 | 2018-09-04 | 韩德辉 | A kind of ultralow temperature glue and preparation method thereof |
| CN109231921A (en) * | 2018-10-25 | 2019-01-18 | 合肥隆扬环保科技有限公司 | A kind of heat preservation environment protection brick and preparation method thereof |
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Application publication date: 20130814 |