CN109956758B - Manufacturing process of flexible heat-insulation board - Google Patents
Manufacturing process of flexible heat-insulation board Download PDFInfo
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- CN109956758B CN109956758B CN201711406721.2A CN201711406721A CN109956758B CN 109956758 B CN109956758 B CN 109956758B CN 201711406721 A CN201711406721 A CN 201711406721A CN 109956758 B CN109956758 B CN 109956758B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/025—Hot pressing, e.g. of ceramic materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/04—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould
- B28B3/06—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould with two or more ram and mould sets
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
- C04B2111/285—Intumescent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a manufacturing process of a flexible heat-insulation board, which comprises the steps of stirring a raw material composition into a gel state, inputting the gel raw material composition into a mould, conveying the mould into a pressing platform, heating the mould in the pressing platform, arranging a heating plate in the pressing platform, directly extruding the raw material composition by using the heating plate to enable the temperature in the raw material composition to reach 65-130 ℃, enabling the pressure in the raw material composition to reach 0.1-0.3 MPa, keeping for more than 8 minutes, demoulding and maintaining. The compression strength of the flexible heat-insulation board manufactured by the manufacturing process is improved to be more than 0.25MPa, the tensile strength is improved to be more than 0.18MPa, the bending deformation value reaches more than 3mm, the heat conductivity coefficient is below 0.06W/(m ∙ K), and the fire-proof grade is improved to A2 (non-combustible).
Description
Technical Field
The invention relates to the field of building materials, in particular to a manufacturing process of a flexible insulation board.
Background
With the annual improvement of energy-saving standards, the external wall heat-insulating technology has been developed greatly and becomes an important building energy-saving technology in China. However, in recent years, accidents such as falling off of external wall insulation materials and fire disasters frequently occur, and serious casualties and property loss are caused. Along with the overall promotion of building energy conservation, the fire prevention problem of building energy-saving materials is more and more severe. The existing thermal insulation materials for external wall thermal insulation are mainly divided into two categories, namely inorganic thermal insulation materials and organic thermal insulation materials, but the materials generally have the defect that energy conservation and fire prevention cannot be simultaneously achieved. Organic materials are poor in heat resistance and easy to burn, and release a large amount of heat during burning to generate a large amount of toxic smoke, so that the fire spread can be accelerated, and trapped people and rescue personnel are easy to injure and die. Once a fire occurs, the fire can be quickly burnt, and the condition of drop melting is easily generated, accelerated or spread. The inorganic material has the accident of personnel and financial loss caused by the whole falling of the heat insulation layer due to low tensile strength.
The graphite is an infrared ray absorber with excellent heat insulation performance, the heat insulation material prepared by wrapping the polystyrene particles with the graphite can improve the heat insulation performance by at least 30% compared with the common EPS heat insulation material, and has the advantages of low water absorption, low moisture permeability coefficient, stable size, high cost performance and the like. However, the graphite polystyrene foam insulation board has a relatively loose internal structure due to the manufacturing process, has low compressive strength, causes large limitation of use range, has low tensile strength, and causes the problem of large-area falling, and the fireproof grade of the graphite polystyrene foam insulation board is still B1 grade (difficult to burn), so that the fireproof requirement cannot be really met, and the larger defect of possible burning exists, so that the raw material with excellent insulation performance cannot be applied in a large scale.
At present, two polystyrene modified heat insulation boards are available in the market, one is formed by mixing foamed phenolic resin serving as a continuous phase mixture and foamed polystyrene particles serving as a dispersed phase, pouring the mixture into a mold with a fixed volume, heating, pressurizing, foaming, curing and then cutting, and the boards are prepared according to the requirements in DG/TJ08-2212-2016 (application technical Specification for thermosetting modified polystyrene board heat insulation systems), the density requirement is 35-55 kg/m, the heat conductivity coefficient requirement is less than 0.039W/(m ∙ K), but the combustibility of the boards can only reach B level (flame resistance); the other insulation board is made by cutting inorganic cementing material, graphite polystyrene particles and various additives through the processes of mixing, stirring, pouring into a die with a fixed volume, pressure forming, natural curing or steam curing and the like. According to the technical standard of inorganic modified non-combustible insulation board external wall insulation system application, the density requirement is less than 170kg/m 3 The heat conductivity coefficient is less than 0.052W/(m ∙ K), the combustion performance reaches A2 level, but the sheet material has great brittleness, the specification size is less than 1200 multiplied by 600mm, otherwise the sheet material is easy to break, the tensile strength of the vertical surface is only more than 0.10MPa according to the standard requirement, the bending deformation is not required, and the strength requirement is not high.
Disclosure of Invention
The invention aims to overcome the defects of small tensile strength, poor heat preservation effect and low combustion performance of a heat preservation plate in the prior art, and provides a manufacturing process of a flexible heat preservation plate, wherein the compressive strength of the manufactured heat preservation plate is improved to be more than 0.25MPa, the tensile strength is improved to be more than 0.18MPa, the bending deformation value reaches more than 3mm, the heat conductivity coefficient is below 0.06W/(m ∙ K), and the fireproof grade is not lower than A2 grade.
The invention solves the technical problems through the following technical scheme:
a manufacturing process of a flexible insulation board is characterized in that a raw material composition comprising 10-121 parts of siliceous minerals, 60-100 parts of binders, 80-270 parts of mineral activators, 5-15 parts of additives, 1-2 parts of reinforcing fibers, 12-20 parts of graphite polystyrene particles and 40-65 parts of water is uniformly premixed and stirred into gel, the gel raw material composition is input into a mold, the mold is sent into a pressing platform, heating the die in the pressing platform, arranging a heating plate in the pressing platform, directly extruding the raw material composition by using the heating plate to ensure that the temperature in the raw material composition reaches 65-130 ℃, ensuring that the pressure in the raw material composition reaches 0.1-0.3 MPa, keeping for more than 8 minutes, demoulding, and maintaining.
Preferably, the siliceous mineral comprises active silica fume, silicon dioxide, vitrified micro bubbles and quartz powder, the binder comprises cement, calcium oxide and fly ash, the mineral activator comprises sodium silicate and sodium fluosilicate, the additive comprises a water reducing agent, a waterproof agent, redispersible latex powder, cellulose ether, graphite and a foaming agent, and the raw material composition comprises the following components in parts by weight: 50 parts of water; 30-50 parts of active silica fume; 3-5 parts of silicon dioxide; 5-6 parts of vitrified micro bubbles; 50-60 parts of quartz powder; 40-50 parts of cement; 25-30 parts of calcium oxide; 8-15 parts of coal ash; 90-110 parts of sodium silicate; 4-5 parts of sodium fluosilicate; 1 part of a water reducing agent; 2 parts of a waterproof agent; 2-3 parts of redispersible latex powder; 2 parts of cellulose ether; 4-5 parts of a foaming agent; 3 parts of graphite; 1 part of reinforcing fiber; 12-15 parts of graphite polystyrene particles.
In an alternative scheme, the siliceous mineral comprises active silica fume, the binder comprises fly ash, the mineral activator comprises light-burned magnesium oxide, magnesium sulfate heptahydrate and sodium silicate, the additive comprises a water reducing agent, a waterproof agent, redispersible latex powder, cellulose ether, graphite and a foaming agent, and the raw material composition comprises the following components in parts by weight: 50 parts of water; 100 portions of light-burned magnesium oxide and 110 portions of light-burned magnesium oxide; 35-50 parts of magnesium sulfate heptahydrate; 2-5 parts of sodium silicate; 1 part of a water reducing agent; 1-3 parts of a waterproof agent; 1 part of redispersible latex powder; 7-10 parts of active silica fume; 10-15 parts of fly ash; 1 part of cellulose ether; 4-5 parts of a foaming agent; 3 parts of graphite; 1 part of chopped glass fiber; 15-17 parts of graphite polystyrene particles.
Preferably, the mold comprises an upper mold and a lower mold, the raw material composition is preliminarily shaped by using the upper mold and the lower mold, after the mold enters the pressing platform, the upper mold is removed, and the raw material composition is directly extruded by using the heating plate and the lower mold until the raw material composition is compressed by 45 to 55 percent in the thickness direction for molding.
Preferably, a plurality of sets of the lower layer die, the raw material composition and the heating plate are repeatedly stacked in sequence for simultaneously pressing a plurality of flexible heat-insulating boards until the raw material composition is compressed by 50% in the thickness direction for forming.
Preferably, the heating temperature applied inside the raw material composition is 80 to 95 ℃.
Preferably, the pressure applied inside the feedstock composition is between 0.15MPa and 0.2 MPa.
Preferably, the duration of the heating and pressurizing of the feedstock composition is at least 10 minutes.
Preferably, the manufacturing process further comprises a primary foaming step of the graphite polystyrene particles before the raw material composition is stirred, wherein the primary foaming step is as follows: and heating and pressurizing the graphite polystyrene particles to foam the graphite polystyrene particles.
Preferably, in the primary foaming step, the pressure of the pressurized steam is 0.2MPa, the heating temperature is 100 ℃, the time of primary foaming is 10 seconds, then the pressure is maintained for 30 seconds, and then the pressure is reduced for 3 seconds.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the manufacturing process of the flexible insulation board adopts the heating plate to directly contact with the raw material composition, so that the pressurizing and heating are more sufficient, a plurality of insulation boards can be hot-pressed at one time, and the production efficiency is greatly improved. The compression strength of the flexible heat-insulation board manufactured by the manufacturing process is improved to be more than 0.25MPa, the tensile strength is improved to be more than 0.18MPa, the bending deformation value reaches more than 3mm, the heat conductivity coefficient is below 0.06W/(m ∙ K) (the heat conductivity coefficient is consistent with that of a rock wool belt), so that the flexible heat-insulation board has a fireproof function while maintaining excellent heat-insulation performance, and the fireproof safety problem of the heat-insulation material of the outer wall of the building is effectively solved.
Drawings
Fig. 1 is a schematic structural view of a mold according to examples 1 to 26 of the present invention.
Fig. 2 is a schematic structural view of a platen according to embodiments 1 to 26 of the present invention.
Fig. 3 is a schematic view of a manufacturing process flow of the flexible insulation board according to embodiments 1 to 26 of the present invention.
Description of the reference numerals:
upper mold 1
Lower layer die 2
Oil hydraulic cylinder 5
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
The materials used in the various examples and comparative examples of the present invention are specifically illustrated below:
active silica fume: 1250 mesh (also known as silica fume) available from Shanghai Weiterui industry development Co., Ltd
Silicon dioxide: also known as silica, available from Jinbei Fine chemical Co., Ltd, Tianjin
Vitrified micro bubbles: from Wanjia energy saving materials GmbH of Dongying
Quartz powder: 600 mesh (also called silica micropowder) purchased from Huzhou Huatian micropowder factory
Cement: 525# from Shanghai Xiqing industries Ltd
Fly ash: class C high calcium ash available from commercial fly ash products of Shanghai City, Inc
Sodium silicate: also known as water glass, available from Yicheng Jingrui New materials Co., Ltd
Sodium fluorosilicate: from Yicheng Jingrui New materials Co., Ltd
Water reducing agent: HF retarding superplasticizer purchased from Shanghai Dongdong chemical industry Co Ltd
Redispersible latex powder: from Guangdong Longhu science & technology GmbH
Cellulose ether: from the Europe brocade chemical industry
Reinforcing fibers: chopped fibers from the Europe brocade chemical industry
Graphite: from Liaoyang Xingwang graphite products Ltd
Calcium oxide: also called quick lime, purchased from Taicang City Oriental metallurgy lime products factory
Foaming agent: carbonate or calcium carbonate available from Guangzhou Jiang Sal chemical Co., Ltd
A water-proofing agent: organosilicon waterproofing agent available from Shanghai Xianbang chemical Co., Ltd
Light-burned magnesium oxide: reproduction from Shandong Jiuyao
Graphite polystyrene particles: f301GT from Tianjin Stanli New materials Co., Ltd
The test standards used in the various examples and comparative examples of the present invention are specified below:
the compressive strength is tested according to GB/T5486-2008 test method for inorganic hard heat insulation products, the tensile strength perpendicular to the plate surface is tested according to GB/T29906 plus 2013 material for molded polystyrene plate thin plastered outer wall external thermal insulation system, the thermal conductivity is tested according to GB/T10294 plus 2008 method for determining the steady-state thermal resistance of heat insulation materials and related characteristics, the bending deformation is tested according to GB/T10801.1 molded polystyrene foam plastics for heat insulation, and the combustion performance grade is tested according to GB 8624 plus 2012 grading for combustion performance of building materials and products.
Example 1
The feedstock composition of example 1 comprises:
the siliceous mineral comprises 50 parts of active silica fume, 5 parts of silicon dioxide, 6 parts of vitrified micro bubbles and 50 parts of quartz powder;
the binder comprises 50 parts of cement, 30 parts of calcium oxide and 10 parts of fly ash;
mineral excitant, which comprises 105 parts of sodium silicate and 5 parts of sodium fluosilicate;
the additive comprises 1 part of water reducing agent, 2 parts of waterproof agent, 2 parts of redispersible latex powder, 2 parts of cellulose ether, 3 parts of graphite and 4 parts of foaming agent;
1 part of reinforcing fiber, namely chopped glass fiber in the embodiment;
15 parts of graphite polystyrene particles;
and 50 parts of water.
The manufacturing process of the flexible insulation board is shown in figure 3, firstly, graphite polystyrene particles are foamed at one time, the expansion volume of the graphite polystyrene particles is increased by heating the graphite polystyrene particles, and the density of the graphite polystyrene particles is correspondingly changed by setting steam pressure, so that the required density requirement is met. The steam pressure was set to 0.2MPa, the temperature was set to 100 ℃ and the time for one foaming was 10 seconds, then the pressure was maintained for 30 seconds and then the pressure was reduced for 3 seconds.
Then, taking the sodium silicate solution, quartz powder, calcium oxide, cement and sodium fluosilicate, fully stirring at a set water temperature of 20 ℃, sequentially adding the fly ash, the active silica fume, the cellulose ether, the chopped glass fiber, the water reducing agent, the waterproof agent, the redispersible latex powder, the graphite and the foaming agent, and stirring for 5 minutes (the stirring time is correspondingly adjusted according to the temperature change, and the rotating speed of the stirrer is set to be 300 revolutions per minute) to ensure that the mixture is completely and uniformly stirred to form the pre-mixed cementing material. The addition of sodium silicate can make the mixture possess fire-resisting property. The addition of materials such as graphite can gradually shorten the initial setting time of the mixture, reduce the fluidity of the mixture, and mainly play a role in improving the bending performance and enhancing the compressive strength and the bending strength of a finished product. Meanwhile, the heat conductivity coefficient is reduced, and the heat preservation effect is enhanced.
And then, adding graphite polystyrene particles into a stirring cylinder, starting the stirrer, and then adding the pre-mixed gel material for mixing and stirring to fully and uniformly mix. After repeated tests, the stirring speed needs to be set at 100 rpm and stirred for 5 minutes, and the graphite polystyrene particles shrink and deform when the speed is too high or the stirring time is too long.
Then the stirred mixture (containing graphite polystyrene particles) is input into a mould (the mould is internally padded with glassine with the thickness of 1mm, so that later-stage demoulding is facilitated), the mould comprises an upper mould 1 and a lower mould 2 as shown in figure 1, the upper mould 1 and the lower mould 2 are superposed, the stirred raw material composition is input into the mould, the raw material composition is preliminarily shaped into a platy raw material composition in the mould, and the inner cavity of the mould is adjustable in the thickness direction. As the material can shrink in a certain proportion after being heated and pressurized, after a plurality of tests, the height of the material level indicator needs to be adjusted to 10cm according to the thickness of a product of 5cm as an example, and the shrinkage proportion is 45 percent. And in order to ensure that the mixture is prevented from generating unevenness in the process of being fed into the die, the transmission speed should be set to be optimal at a ratio of 1m in 1 minute.
Before the mould enters the pressing platform 3, the pressing platform 3 is preheated by an oil temperature machine. The upper die 1 is then removed and the lower die 2 loaded with the plate-like feedstock composition is moved into a flattening table 3 as shown in figure 2. In the flattening table 3, there are a plurality of heating plates 4 stacked one on top of the other, the initial gap between each two heating plates 4 being greater than the sum of the heights of the lower die 2 and the plate-like starting material composition. After the temperature reaches a set value, the die is pushed in, an oil hydraulic cylinder 5 is used for upward extrusion, two adjacent heating plates 4 can move relatively, so that the gap between every two adjacent heating plates 4 is synchronously reduced, each platy raw material composition is synchronously extruded, when the raw material composition is extruded to a certain amount in the thickness direction, the heating plates 4 are stopped moving, the temperature in the raw material composition reaches 65 ℃, the pressure in the raw material composition reaches 0.1MPa, the pressure is kept for 8 minutes for forming, and graphite polystyrene particles are subjected to secondary foaming in the heating and pressurizing process. And then the oil temperature machine is closed to naturally cool the die.
And finally, curing the demoulded product in a curing room, wherein the curing room is dried and ventilated, and the curing time is 7 days.
The obtained sample is detected to have the compressive strength of 0.250MPa, the tensile strength vertical to the plate surface of 0.182MPa, the bending deformation value of 3.010mm, the heat conductivity coefficient of 0.0580W/(m ∙ K), and the combustion performance grade of the sample reaches A2 grade.
Examples 2 to 5
Examples 2 to 5 were substantially the same as example 1 except that the raw material compositions were heated at 80 ℃, 95 ℃, 110 ℃ and 130 ℃ in examples 2, 3, 4 and 5. The results of testing the samples obtained in examples 1-5 are shown in Table 1.
Examples 6 to 10
Examples 6 to 10 basically have the same material composition and manufacturing process as in example 1, except that in examples 6, 7, 8, 9 and 10, the pressure applied to the inside of the raw material composition during pressurization was 0.15MPa, and the temperatures applied to the inside of the raw material composition during heating were 65 ℃, 80 ℃, 95 ℃, 110 ℃ and 130 ℃, respectively. The results of testing the samples obtained in examples 6-10 are shown in Table 2.
Examples 11 to 15
Examples 11 to 15 were substantially the same as example 1 in the material composition ratio and production process, except that in examples 11, 12, 13, 14 and 15, the pressure applied to the inside of the raw material composition during pressurization was 0.2MPa, and the temperatures applied to the inside of the raw material composition during heating were 65 ℃, 80 ℃, 95 ℃, 110 ℃ and 130 ℃, respectively. The results of testing the samples obtained in examples 11-15 are shown in Table 3.
Examples 16 to 20
The material ratios and manufacturing processes used in examples 16 to 20 were substantially the same as those of example 1, except that in examples 16, 17, 18, 19, and 20, the pressure applied to the inside of the raw material composition during pressurization was 0.25MPa, and the temperatures applied to the inside of the raw material composition during heating were 65 ℃, 80 ℃, 95 ℃, 110 ℃, and 130 ℃, respectively. The results of testing the samples obtained in examples 16-20 are shown in Table 4.
Examples 21 to 25
The material ratios and manufacturing processes used in examples 21 to 25 were substantially the same as those used in example 1, except that in examples 21, 22, 23, 24 and 25, the pressure applied to the inside of the raw material composition during pressurization was 0.3MPa, and the temperatures applied to the inside of the raw material composition during heating were 65 ℃, 80 ℃, 95 ℃, 110 ℃ and 130 ℃, respectively. The results of testing the samples obtained in examples 21-25 are shown in Table 5.
Example 26
Example 26 uses substantially the same material formulation and manufacturing process as example 13, except that in example 26, the duration of the heating and pressing of the raw material composition is 10 minutes. The results of testing the samples obtained in example 26 are shown in Table 6.
As can be seen from examples 1 to 26, the internal temperature of the raw material composition is set to 65 to 130 ℃ and the internal pressure of the raw material composition is set to 0.1 to 0.3MPa, and when the raw material composition is held for 8 minutes or longer, the raw material composition can achieve the technical effects of a compressive strength of 0.25MPa or more, a tensile strength of 0.18MPa or more, a bending deformation value of 3mm or more and a thermal conductivity of 0.06W/(m ∙ K) or less.
Comparative examples 1 to 5
Comparative examples 1 to 5 were substantially the same as example 1 in the material ratio and the manufacturing process, except that in comparative examples 1, 2, 3, 4 and 5, the pressure applied to the inside of the raw material composition when pressurizing was 0.08MPa, and the temperatures applied to the inside of the raw material composition when heating were 65 ℃, 80 ℃, 95 ℃, 110 ℃ and 130 ℃, respectively. The results of testing the samples obtained in comparative examples 1 to 5 are shown in Table 7.
Comparative examples 6 to 10
Comparative examples 6 to 10 were substantially the same as example 1 in the material composition ratio and the manufacturing process, except that in comparative examples 6, 7, 8, 9 and 10, the pressure applied to the inside of the raw material composition at the time of pressurization was 0.32MPa, and the temperatures applied to the inside of the raw material composition at the time of heating were 65 ℃, 80 ℃, 95 ℃, 110 ℃ and 130 ℃, respectively. The results of testing the samples obtained in comparative examples 6-10 are shown in Table 8.
Comparative examples 11 to 15
Comparative examples 11 to 15 were substantially the same as example 1 except that in comparative examples 11, 12, 13, 14 and 15, the temperature applied to the inside of the raw material composition at the time of heating was 60 ℃ and the pressure applied to the inside of the raw material composition at the time of pressurizing was 0.1MPa, 0.15MPa, 0.2MPa, 0.25MPa and 0.3MPa, respectively. The results of testing the samples obtained in comparative examples 11 to 15 are shown in Table 9.
Comparative examples 16 to 20
Comparative examples 16 to 20 were substantially the same as example 1 except that in comparative examples 16, 17, 18, 19 and 20, the temperature applied to the inside of the raw material composition at the time of heating was 135 ℃ and the pressure applied to the inside of the raw material composition at the time of pressurizing was 0.1MPa, 0.15MPa, 0.2MPa, 0.25MPa and 0.3MPa, respectively. The results of testing the samples obtained in comparative examples 16-20 are shown in Table 10.
Comparative example 21
Comparative example 21 used substantially the same material formulation and fabrication process as example 13, except that in comparative example 21, the duration of heating and pressing the raw material composition was 7 minutes. The test results of the test piece obtained in comparative example 21 are shown in Table 11.
As can be seen from comparative examples 1 to 21, when the internal temperature of the raw material composition is made to be less than 65 ℃ or more than 130 ℃ and the internal pressure of the raw material composition is made to be less than 0.1MPa or more than 0.3MPa, or the raw material composition is held for less than 8 minutes, the technical effects of a compressive strength of 0.25MPa or more, a tensile strength of 0.18MPa or more, a bending deformation value of 3mm or more, and a thermal conductivity of 0.06W/(m ∙ K) or less are not simultaneously achieved.
The manufacturing process of the flexible insulation board adopts the heating plate to directly contact with the raw material composition, so that the pressurization and heating are more sufficient, a plurality of insulation boards can be hot-pressed at one time, and the production efficiency is greatly improved. The compression strength of the flexible heat-insulation board manufactured by the manufacturing process is improved to be more than 0.25MPa, the tensile strength is improved to be more than 0.18MPa, the bending deformation value reaches more than 3mm, the heat conductivity coefficient is below 0.06W/(m ∙ K) (the heat conductivity coefficient is consistent with that of a rock wool belt), so that the flexible heat-insulation board has a fireproof function while maintaining excellent heat-insulation performance, and the fireproof safety problem of the heat-insulation material of the outer wall of the building is effectively solved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes or modifications to these embodiments may be made by those skilled in the art without departing from the principle and spirit of this invention, and these changes and modifications are within the scope of this invention.
Claims (7)
1. A manufacturing process of a flexible insulation board is characterized in that 50 parts of water is adopted; 30-50 parts of active silica fume; 3-5 parts of silicon dioxide; 5-6 parts of vitrified micro bubbles; 50-60 parts of quartz powder; 40-50 parts of cement; 25-30 parts of calcium oxide; 8-15 parts of fly ash; 90-110 parts of sodium silicate; 4-5 parts of sodium fluosilicate; 1 part of a water reducing agent; 2 parts of a waterproof agent; 2-3 parts of redispersible latex powder; 2 parts of cellulose ether; 4-5 parts of a foaming agent; 3 parts of graphite; 1 part of reinforcing fiber; uniformly premixing 12-15 parts of raw material composition of graphite polystyrene particles, stirring the raw material composition into gel, inputting the gel raw material composition into a mold, wherein the mold comprises an upper mold and a lower mold, preliminarily shaping the raw material composition by adopting the upper mold and the lower mold, sending the mold into a pressing platform, arranging a heating plate in the pressing platform, removing the upper mold after the mold enters the pressing platform, directly extruding the raw material composition by using the heating plate and the lower mold to enable the temperature in the raw material composition to reach 65-130 ℃, enabling the pressure in the raw material composition to reach 0.1-0.3 MPa, keeping the pressure for more than 8 minutes until the raw material composition is compressed by 45-55% in the thickness direction for molding, demolding and maintaining.
2. The manufacturing process of the flexible insulation board according to claim 1, wherein a plurality of groups of the lower layer die, the raw material composition and the heating plate are repeatedly stacked in sequence for simultaneously pressing a plurality of flexible insulation boards until the raw material composition is compressed by 50% in the thickness direction for molding.
3. The process for making a flexible thermal insulation board according to claim 1, wherein the heating temperature applied to the interior of the raw material composition is 80-95 ℃.
4. The manufacturing process of the flexible insulation board according to claim 1, wherein the pressure applied to the interior of the raw material composition is 0.15MPa-0.2 MPa.
5. A process of making a flexible insulation board according to claim 1, wherein the heating and pressing of the feedstock composition is for a duration of at least 10 minutes.
6. A manufacturing process of a flexible heat insulation board according to any one of claims 1 to 5, characterized in that the manufacturing process further comprises a primary foaming step of the graphite polystyrene particles before the raw material composition is stirred, wherein the primary foaming step is as follows: and heating and pressurizing the graphite polystyrene particles to foam the graphite polystyrene particles.
7. The manufacturing process of the flexible insulation board according to claim 6, wherein in the primary foaming step, the pressure of the pressurized steam is 0.2MPa, the heating temperature is 100 ℃, the primary foaming time is 10 seconds, then the pressure is maintained for 30 seconds, and then the pressure is reduced for 3 seconds.
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| CN103087601B (en) * | 2011-10-31 | 2015-01-21 | 亚士创能科技(上海)股份有限公司 | Fireproof composition and fireproof heat insulation plate |
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| CN101229970A (en) * | 2007-01-23 | 2008-07-30 | 上海同表保温科技有限公司 | Exterior wall composite insulation heat-proof plastering material |
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