CN112279613A - Light fiber heat insulation plate and preparation method thereof - Google Patents

Light fiber heat insulation plate and preparation method thereof Download PDF

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Publication number
CN112279613A
CN112279613A CN202011222162.1A CN202011222162A CN112279613A CN 112279613 A CN112279613 A CN 112279613A CN 202011222162 A CN202011222162 A CN 202011222162A CN 112279613 A CN112279613 A CN 112279613A
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slurry
thermal insulation
stirring
parts
binder
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张成贺
任大贵
刘超
桑林
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Luyang Energy Saving Materials Co Ltd
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Luyang Energy Saving Materials Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped
    • 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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • 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
    • C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • 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
    • C04B2111/40—Porous or lightweight materials

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Thermal Insulation (AREA)
  • Building Environments (AREA)

Abstract

The invention relates to the technical field of building materials, in particular to a light fiber heat-insulating plate and a preparation method thereof. The light fiber thermal insulation board comprises the following components in parts by weight: 20-70 parts of inorganic fibers; 20-70 parts of expanded perlite; 8-10 parts of a binding agent; 0.5-2 parts of a foaming agent; the binder includes an organic binder and an inorganic binder. The lightweight fiber thermal insulation board provided by the invention can obtain better thermal conductivity and mechanical property under the condition of smaller volume density under the synergistic action of the components. Experimental results show that the light fiber thermal insulation board prepared by the invention has small volume weight, the thermal conductivity coefficient is not more than 0.08W/(m.K), and the thermal insulation effect is excellent; the compressive strength after firing is not lower than 50KPa, and the mechanical property is better.

Description

Light fiber heat insulation plate and preparation method thereof
Technical Field
The invention relates to the technical field of building materials, in particular to a light fiber heat-insulating plate and a preparation method thereof.
Background
The light-weight fiber thermal insulation board can be widely applied to petrochemical, metallurgical, electric, transportation and building industries, and is used for kiln back lining thermal insulation, vehicle partition boards, fire partitions and the like. Current conventional lightweight insulation materials include ceramic fibersThe bulk density of the product is generally 220kg/m3The problems of large energy waste and inconvenient construction exist when the method is applied to the transportation and building industries.
Chinese patent publication No. CN102985388A discloses a lightweight thermal insulation panel comprising high temperature resistant biosoluble inorganic fibers, expanded perlite, binder, and optionally conventional high temperature resistant inorganic fibers. Further provided is a method for making a lightweight, fibrous high temperature thermal insulation panel, comprising: (a) providing an aqueous slurry comprising: from about 15% to about 90% high temperature resistant biosoluble inorganic fibers, from about 10% to about 80% expanded perlite, from 0% to about 50% by weight of at least one of organic binder or from 0% to about 20% inorganic binder, and optionally from 0% to about 70% conventional high temperature resistant fibers; (b) forming a lightweight fibrous insulation panel by depositing the aqueous slurry onto a substrate; (c) partially dewatering the slurry on the substrate to form a fibrous layer; (d) the fibrous layer is dried to a moisture content of no greater than about 5% by weight. The heat-conducting property and the mechanical property of the light fiber heat-insulating plate are both to be improved, and the volume density is not small enough.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide a lightweight fiber thermal insulation board and a manufacturing method thereof, and the lightweight fiber thermal insulation board provided by the present invention can obtain superior thermal conductivity and mechanical properties under the condition of smaller volume density.
The invention provides a light fiber thermal insulation board which comprises the following components in parts by weight:
Figure BDA0002762414830000011
the binder includes an organic binder and an inorganic binder.
Preferably, the inorganic fiber is selected from one or more of glass fiber, aluminum silicate fiber, magnesium silicate fiber and crystalline alumina fiber.
Preferably, the bulk density of the expanded perlite is 70-150 kg/m3。
Preferably, the organic binder is selected from one of pregelatinized starch, cellulose and flexible acrylate emulsion;
the inorganic binder is selected from silica sol or water glass;
the mass ratio of the organic binder to the inorganic binder is 1: 3.
preferably, the foaming agent is selected from sodium lauryl sulfate or rosin soap.
The invention also provides a preparation method of the light-weight fiber heat insulation board, which comprises the following steps:
A) stirring and mixing inorganic fiber, expanded perlite, an organic binding agent and water to obtain first slurry;
B) stirring and mixing the foamed foaming agent and the first slurry to obtain a second slurry;
C) stirring and mixing the second slurry and an inorganic binder to obtain a third slurry;
D) and dehydrating and molding the third slurry, and drying to obtain the light fiber thermal insulation board.
Preferably, in the step A), the solid content of the first slurry is 20-30 wt%;
the stirring speed is 400-600 rpm; the stirring and mixing time is 10-15 min.
Preferably, in the step B), the stirring speed is 200-400 rpm; the stirring and mixing time is 4-6 min.
Preferably, in the step C), the stirring speed is 200-400 rpm; the stirring and mixing time is 3-5 min.
Preferably, in step D), the dewatering forming is carried out in a forming wire;
the drying temperature is 90-120 ℃.
The invention provides a light fiber thermal insulation board which comprises the following components in parts by weight: 20-70 parts of inorganic fibers; 20-70 parts of expanded perlite; 8-10 parts of a binding agent; 0.5-2 parts of a foaming agent; the binder includes an organic binder and an inorganic binder. The lightweight fiber thermal insulation board provided by the invention can obtain better thermal conductivity and mechanical property under the condition of smaller volume density under the synergistic action of the components. Experimental results show that the light fiber thermal insulation board prepared by the invention has small volume weight, the thermal conductivity coefficient is not more than 0.08W/(m.K), and the thermal insulation effect is excellent; the compressive strength after firing is not lower than 50KPa, and the mechanical property is better.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a light fiber thermal insulation board which comprises the following components in parts by weight:
Figure BDA0002762414830000031
the binder includes an organic binder and an inorganic binder.
The light fiber heat insulation board provided by the invention comprises 20-70 parts by weight of inorganic fibers. In certain embodiments of the present invention, the inorganic fiber is 20 parts, 45 parts, 50 parts, or 70 parts by weight. In certain embodiments of the present invention, the inorganic fibers are selected from one or more of glass fibers, aluminum silicate fibers, magnesium silicate fibers, and crystalline alumina fibers.
In some embodiments of the present invention, the glass fiber has a fiber diameter of 5 to 8 μm and a length of 5 to 10 mm. In certain embodiments, the glass fibers have a fiber diameter of 5 μm and a length of 8 mm.
In some embodiments of the invention, the aluminum silicate fibers are Al2O3The content of (A) is 40 wt% -55 wt%, SiO2The content of (A) is 45 wt% -60 wt%. In some embodiments, the fibers of aluminum silicate,Al2O3is 42 wt% SiO2The content of (B) was 57% by weight. In some embodiments of the present invention, the aluminum silicate fibers have a fiber diameter of 2 to 5 μm. In certain embodiments, the aluminum silicate fibers have a fiber diameter of 2 μm.
In certain embodiments of the present invention, the magnesium silicate fibers are SiO2The content of (A) is 66 wt% -86 wt%, and the content of MgO is 14 wt% -34 wt%. In certain embodiments, the magnesium silicate fibers are SiO2The content of (B) is 66 wt% and the content of MgO is 33 wt%. In some embodiments of the present invention, the magnesium silicate fibers have a fiber diameter of 3 to 5 μm. In certain embodiments, the magnesium silicate fibers have a fiber diameter of 5 μm.
In certain embodiments of the present invention, the crystalline alumina fibers comprise Al2O3The content of (A) is 72 wt% -90 wt%, SiO2The content of (A) is 10 wt% -28 wt%. In certain embodiments, the crystalline alumina fibers comprise Al2O3Is 75 wt% SiO2The content of (B) was 24.5 wt%. In some embodiments of the present invention, the crystalline alumina fibers have a fiber diameter of 3 to 5 μm. In certain embodiments, the crystalline alumina fibers have a fiber diameter of 4 μm.
The lightweight fiber thermal insulation board provided by the invention also comprises 20-70 parts by weight of expanded perlite. In certain embodiments of the invention, the parts by weight of the expanded perlite is 70 parts, 45 parts, 40 parts, or 20 parts. In certain embodiments of the invention, the expanded perlite has a bulk density of 70 to 150kg/m3. In certain embodiments, the expanded perlite has a bulk density of 70kg/m3、100kg/m3Or 150kg/m3。
The light fiber thermal insulation board provided by the invention further comprises 8-10 parts by weight of a bonding agent, wherein the bonding agent comprises an organic bonding agent and an inorganic bonding agent. In certain embodiments of the invention, the binder is present in an amount of 9.5 parts, 8 parts, or 10 parts by weight.
In certain embodiments of the present invention, the organic binder is selected from one of pregelatinized starch, cellulose, and flexible acrylate emulsion.
In certain embodiments of the invention, the pregelatinized starch has an active ingredient content of greater than or equal to 99 wt%. In certain embodiments, the pregelatinized starch is available from yatokay and energy saving materials, ltd. In certain embodiments, the pregelatinized starch comprises an active ingredient content of 99 wt%.
In certain embodiments of the invention, the cellulose has an active ingredient content of 96 wt% or more. In certain embodiments, the cellulose has an active ingredient content of 97 wt%. In certain embodiments, the pregelatinized starch is purchased from chemical ltd, dawn, chanan.
In certain embodiments of the invention, the flexible acrylate emulsion has a glass transition temperature of-8 to-15 ℃ and a concentration of 40 to 50 wt%. In certain embodiments, the flexible acrylate emulsion has a glass transition temperature of-12 ℃ and a concentration of 42 wt%. In certain embodiments, the flexible acrylate emulsion is available from cigarette taiwanghua polyurethane, inc.
In certain embodiments of the present invention, the inorganic binder is selected from silica sol or water glass.
In some embodiments of the present invention, the content of the active ingredient of the silica sol is 30 wt% to 40 wt%, and the pH value is 8 to 10. In certain embodiments, the silica sol has an active ingredient content of 30 wt%, 35 wt%, or 40 wt% and a pH of 8, 9, or 10. In certain embodiments, the silica sol is purchased from jinan hong cultigen limited.
In some embodiments of the invention, the content of the active ingredients of the water glass is 40 wt% to 50 wt%, and the pH value is 9 to 10. In certain embodiments, the water glass has an active ingredient content of 40 wt% and a pH of 9. In certain embodiments, the water glass is available from johnson flourishing chemical technology ltd.
In certain embodiments of the present invention, the mass ratio of the organic binder to the inorganic binder is 1: 3.
the lightweight fiber thermal insulation board provided by the invention also comprises 0.5-2 parts by weight of foaming agent. In certain embodiments of the present invention, the blowing agent is present in an amount of 0.5 parts, 2 parts, or 1 part by weight.
In certain embodiments of the present invention, the foaming agent is selected from sodium lauryl sulfate or rosin soap.
In some embodiments of the invention, the content of the active ingredient of the sodium dodecyl sulfate is greater than or equal to 90 wt%, and the pH value is 7.5-9.5. In certain embodiments, the sodium lauryl sulfate has an active ingredient content of 90 wt% or 92 wt% and a pH of 8 or 9.5. In certain embodiments, the sodium lauryl sulfate is available from Shanghai Populus tremula industries.
In certain embodiments of the invention, the rosin soap is purchased from li yang chemical limited.
The invention also provides a preparation method of the light-weight fiber thermal insulation board, which comprises the following steps:
A) stirring and mixing inorganic fiber, expanded perlite, an organic binding agent and water to obtain first slurry;
B) stirring and mixing the foamed foaming agent and the first slurry to obtain a second slurry;
C) stirring and mixing the second slurry and an inorganic binder to obtain a third slurry;
D) and dehydrating and molding the third slurry, and drying to obtain the light fiber thermal insulation board.
In the preparation method of the light-weight fiber thermal insulation board provided by the invention, the components and the proportion of the adopted raw materials are the same as those in the above, and are not described again.
Inorganic fiber, expanded perlite, organic binder and water are stirred and mixed to obtain first slurry.
In certain embodiments of the invention, the temperature of the agitated mixing is room temperature. In some embodiments of the present invention, the stirring and mixing speed is 400 to 600 rpm. In certain embodiments, the speed of the agitation mixing is 400rpm, 500rpm, or 600 rpm. In some embodiments of the invention, the stirring and mixing time is 10-15 min. In certain embodiments, the time of the stirring and mixing is 15min, 12min, or 10 min.
In certain embodiments of the present disclosure, the first slurry has a solid content of 20 wt% to 30 wt%. In certain embodiments, the solids content of the first slurry is 20 wt%, 25 wt%, or 30 wt%.
And after the first slurry is obtained, stirring and mixing the foamed foaming agent and the first slurry to obtain a second slurry.
In certain embodiments of the present invention, the foamed blowing agent is prepared according to the following method:
and adding a foaming agent into the foaming machine, and performing foaming operation to obtain the foamed foaming agent.
The foaming operation is not particularly limited in the present invention, and a foaming operation known to those skilled in the art may be used.
In certain embodiments of the invention, the temperature of the agitated mixing is room temperature. In some embodiments of the present invention, the stirring and mixing speed is 200 to 400 rpm. In certain embodiments, the speed of the agitation mixing is 200rpm, 300rpm, or 400 rpm. In some embodiments of the invention, the stirring and mixing time is 4-6 min. In certain embodiments, the time of the stirring and mixing is 4min, 5min, or 6 min.
And after the second slurry is obtained, stirring and mixing the second slurry and the inorganic binder to obtain a third slurry.
In certain embodiments of the invention, the temperature of the agitated mixing is room temperature. In some embodiments of the present invention, the stirring and mixing speed is 200 to 400 rpm. In certain embodiments, the speed of the agitation mixing is 200rpm, 300rpm, or 400 rpm. In some embodiments of the present invention, the stirring and mixing time is 3-5 min. In certain embodiments, the time of the stirring and mixing is 5min or 4 min.
And after the third slurry is obtained, dehydrating and molding the third slurry, and drying to obtain the light fiber thermal insulation board.
In certain embodiments of the invention, the dewatering formation is carried out in a forming wire. Specifically, the method comprises the following steps: and forming and leveling the third slurry in a forming net through natural draining.
In certain embodiments of the present invention, the method of drying is oven drying. In some embodiments of the present invention, the temperature of the drying is 90 to 120 ℃. In certain embodiments, the temperature of the drying is 90 ℃, 100 ℃, or 120 ℃.
The source of the above-mentioned raw materials is not particularly limited in the present invention, and may be generally commercially available.
In order to further illustrate the present invention, the following detailed description of a lightweight fiber thermal insulation panel and a method for manufacturing the same will be provided with reference to examples, which should not be construed as limiting the scope of the present invention.
Example 1
In the raw materials, the fiber length of the glass fiber is 5mm, and the fiber diameter is 8 μm; bulk density of expanded perlite 70kg/m3(ii) a The content of the active ingredients of the pregelatinized starch is 99 percent; the content of the effective component of the sodium dodecyl sulfate is 90 percent, and the pH value is 8; the content of active ingredients of the silica sol is 30 percent, and the pH value is 8.
Weighing 20 parts by weight of glass fiber, 70 parts by weight of expanded perlite and 2.375 parts by weight of pregelatinized starch, adding into a high-speed stirrer which is injected with water in advance, controlling the solid content of the slurry to be 20 wt%, stirring at the speed of 400rpm, and stirring for 15 min; adding sodium dodecyl sulfate into a foaming machine, and performing foaming operation to obtain foam; then 0.5 weight part of foam is introduced into the slurry, the stirring speed is adjusted to 200rpm, and the stirring time is 4 min; then, 7.125 parts by weight of silica sol was introduced into the slurry, and the stirring speed was 200rpm for 5 min. And (3) placing the prepared slurry on a forming net in a pulp flowing mode, forming and leveling the slurry through natural water filtration, and then drying the slurry to obtain the light fiber thermal insulation board, wherein the drying temperature is 90 ℃.
Example 2
In the raw material, the aluminum silicate fiber contains Al2O3 42wt％、SiO257 wt% and other 1 wt%, fiber diameter 2 μm; bulk density of expanded perlite 100kg/m3(ii) a The content of the effective component of the cellulose is 97 wt%; the content of the effective component of the sodium dodecyl sulfate is 92wt percent, and the pH value is 9.5; the content of active ingredient in silica sol is 35 wt%, pHThe value was 9.
Weighing 45 parts by weight of aluminum silicate fiber, 45 parts by weight of expanded perlite and 2 parts by weight of cellulose, adding the mixture into a high-speed stirrer which is injected with water in advance, controlling the solid content of the slurry to be 25 wt%, stirring at the speed of 500rpm, and stirring for 12 min; adding sodium dodecyl sulfate into a foaming machine, and performing foaming operation to obtain foam; then introducing 2 parts by weight of foam into the slurry, adjusting the stirring speed to 300rpm, and stirring for 5 min; then, 6 parts by weight of silica sol was introduced into the slurry, and the stirring speed was 300rpm for 4 min. And (3) placing the prepared slurry on a forming net in a pulp flowing mode, forming and leveling the slurry through natural water filtration, and then drying the slurry to obtain the light fiber thermal insulation board, wherein the drying temperature is 100 ℃.
Example 3
In the raw material, the magnesium silicate fiber contains SiO266 wt%, MgO 33 wt% and others 1 wt%, fiber diameter 5 μm; bulk density of expanded perlite 100kg/m3(ii) a The active ingredient content of the pregelatinized starch is 99 wt%; the active ingredient content of the water glass is 40 wt%, and the pH value is 9.
Weighing 50 parts by weight of magnesium silicate fiber, 40 parts by weight of expanded perlite and 2 parts by weight of pregelatinized starch, adding into a high-speed stirrer with water injected in advance, controlling the solid content of the slurry to be 25 wt%, stirring at the speed of 500rpm, and stirring for 12 min; adding rosin soap into a foaming machine, and performing foaming operation to obtain foam; then introducing 2 parts by weight of foam into the slurry, adjusting the stirring speed to 300rpm, and stirring for 5 min; then, 6 parts by weight of water glass was introduced into the slurry, and the stirring speed was 300rpm for 4 min. And (3) placing the prepared slurry on a forming net in a pulp flowing mode, forming and leveling the slurry through natural water filtration, and then drying the slurry to obtain the light fiber thermal insulation board, wherein the drying temperature is 100 ℃.
Example 4
In the raw material, the crystalline alumina fiber contains Al2O3 75wt％、SiO224.5 wt% and other 0.5 wt%, fiber diameter 4 μm; bulk density of expanded perlite 150kg/m3(ii) a The glass transition temperature of the flexible acrylate emulsion is-12 ℃, and the concentration is 42 wt%; the content of active ingredients of the silica sol is 40 wt%, and the pH value is 10.
Weighing 70 parts by weight of crystalline alumina fiber, 20 parts by weight of expanded perlite and 2.5 parts by weight of flexible acrylate emulsion, adding into a high-speed stirrer which is injected with water in advance, controlling the solid content of the slurry to be 30 wt%, stirring at a speed of 600rpm, and stirring for 10 min; adding rosin soap into a foaming machine, and performing foaming operation to obtain foam; then introducing 1 part by weight of foam into the slurry, adjusting the stirring speed to 400rpm, and stirring for 6 min; then, 7.5 parts by weight of silica sol was introduced into the slurry at a stirring speed of 400rpm for 5 min. And (3) placing the prepared slurry on a forming net in a pulp flowing mode, forming and leveling the slurry through natural water filtration, and then drying the slurry to obtain the light fiber thermal insulation board, wherein the drying temperature is 120 ℃.
Comparative example 1
In the raw materials, the magnesium silicate fiber contains SiO 266 percent, MgO 33 percent and other 1 percent, and the fiber diameter is 5 mu m; bulk density of expanded perlite 100kg/m3(ii) a The glass transition temperature of the flexible acrylate emulsion is-12 ℃, and the concentration is 42 wt%; the content of active ingredients of the silica sol is 40 wt%, and the pH value is 10.
Weighing 56 parts by weight of magnesium silicate fiber, 40 parts by weight of expanded perlite and 4 parts by weight of flexible acrylate emulsion, adding into a high-speed stirrer with water injected in advance, controlling the solid content of the slurry to be 1 wt%, stirring at 600rpm, and stirring for 10 min. After forming the mat from the slurry vacuum, the mat was dried in a convection oven at 120 ℃ until substantially all of the water was removed, resulting in a rigid panel.
The lightweight fiber thermal insulation boards prepared in examples 1 to 4 of the present invention were numbered A, B, C, D in this order, and the rigid board prepared in comparative example 1 was numbered E. The samples were tested for bulk density, average 300 ℃ thermal conductivity, and compressive strength after calcination at 700 ℃ for 2h, respectively, to obtain the data shown in table 1.
TABLE 1 bulk density, average 300 ℃ thermal conductivity and compressive strength after calcination at 700 ℃ for 2h of the samples
Figure BDA0002762414830000081
Figure BDA0002762414830000091
As can be seen from the table 1, the lightweight fiber thermal insulation board (A, B, C, D) prepared by the invention has small volume weight, the thermal conductivity coefficient is not more than 0.08W/(m.K), and the thermal insulation effect is excellent; the compressive strength after firing is not less than 50KPa, and the material still has certain self-supporting property. The sample of comparative example 1 has a large thermal conductivity and poor thermal insulation performance under the same detection conditions; the strength at high temperature is very poor, and when the fiber is used in a kiln, the fiber is easy to fall off, thereby affecting the heat insulation effect.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A light fiber thermal insulation board comprises the following components in parts by weight:
Figure FDA0002762414820000011
the binder includes an organic binder and an inorganic binder.
2. The lightweight, fibrous thermal insulation panel according to claim 1, wherein said inorganic fibers are selected from one or more of glass fibers, aluminum silicate fibers, magnesium silicate fibers and crystalline alumina fibers.
3. The lightweight, fibrous thermal insulation panel according to claim 1, wherein said expanded perlite has a bulk density of 70 to E150kg/m3。
4. The lightweight, fibrous thermal insulation panel according to claim 1, wherein said organic binder is selected from one of pregelatinized starch, cellulose, and flexible acrylate emulsion;
the inorganic binder is selected from silica sol or water glass;
the mass ratio of the organic binder to the inorganic binder is 1: 3.
5. the lightweight, fibrous thermal insulation panel according to claim 1, wherein said blowing agent is selected from sodium lauryl sulfate or rosin soap.
6. A method of making a lightweight, fibrous thermal insulation panel as recited in claim 1, comprising the steps of:
A) stirring and mixing inorganic fiber, expanded perlite, an organic binding agent and water to obtain first slurry;
B) stirring and mixing the foamed foaming agent and the first slurry to obtain a second slurry;
C) stirring and mixing the second slurry and an inorganic binder to obtain a third slurry;
D) and dehydrating and molding the third slurry, and drying to obtain the light fiber thermal insulation board.
7. The preparation method according to claim 6, wherein in the step A), the solid content of the first slurry is 20-30 wt%;
the stirring speed is 400-600 rpm; the stirring and mixing time is 10-15 min.
8. The preparation method according to claim 6, wherein in the step B), the stirring speed is 200-400 rpm; the stirring and mixing time is 4-6 min.
9. The method according to claim 6, wherein in the step C), the stirring speed is 200 to 400 rpm; the stirring and mixing time is 3-5 min.
10. The method according to claim 6, wherein in step D), the dewatering forming is performed in a forming wire;
the drying temperature is 90-120 ℃.
CN202011222162.1A 2020-11-05 2020-11-05 Light fiber heat insulation plate and preparation method thereof Pending CN112279613A (en)

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