Fly-ash fiber heat-insulation acoustic board and preparation method thereof

A technology of fly ash fiber and sound-absorbing panels, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as poor sound absorption and heat insulation, mildew, and environmental pollution

Active Publication Date: 2012-12-19

SHANGHAI HUAMING HI TECH GRP

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AI-Extracted Technical Summary

Problems solved by technology

[0003] At present, various indoor top surface decoration materials appearing on the market are generally made of aluminum, rock wool, calcium carbonate or gypsum ceiling boards, but there are some disadvantages: the surface of aluminum ceiling boards is smooth, the visual effect is not good, And the cost is high; the rock wool ceiling board is light and has good sound absorption effect, but it contains plant starch or formaldehyde carcinogens, which is harmful t...

Abstract

The invention provides a fly-ash fiber heat-insulation acoustic board and a preparation method thereof. Raw materials and weight percentages are as follows: 80.0-94.8 wt% of a fly-ash fiber, 3.1-10.0 wt% of an adhesive and 2.1-10.0 wt% of an additive. The fly-ash fiber heat-insulation acoustic board employs the fly-ash fiber as a matrix, wherein the raw material of the fly-ash fiber is fly ashes of industrial solid waste of power plants. The obtained product has volume density of 350-450 kg/m<3>, noise reduction coefficient of 0.45-0.65 and thermal resistance of 0.40-0.60 (m<2>.K)/W. The combustion performance of the fly-ash fiber heat-insulation acoustic board reaches to the requirements of A-grade non-combustible standard. The fly-ash fiber heat-insulation acoustic board has no materials poisonous and harmful to human and environment, such as formaldehyde, benzenes and the like, and can be widely applied in furred ceilings of indoor top surfaces and decoration and heat-insulation of walls for restaurants, hotels, commercial buildings, dwelling houses, office buildings, auditoriums, markets, movie theaters, subways, stations, factories, hospitals, airports, tunnels, etc.

Application Domain

Solid waste management

Technology Topic

BenzeneAdhesive +12

Image

Examples

Experimental program(9)

Example Embodiment

[0044] Example 1

[0045] Fly ash fiber 92.0wt%

[0046] Polyvinyl acetate emulsion (solid content 48wt%) 5.0wt%

[0047] Water-based paraffin emulsion (solid content 30wt%) 3.0wt%

[0048] The fly ash fiber is formulated into a water-based slurry with a concentration of 2wt%, then polyvinyl acetate emulsion and water-based paraffin emulsion are added, stirred and dispersed evenly, and poured into a mold, squeezed to remove excess water to obtain a wet billet , Natural drying, to obtain fly ash fiber insulation sound-absorbing board. The fly ash fiber thermal insulation sound-absorbing panel is cut and removed, planed, sprayed, and dried to obtain the fly ash fiber thermal insulation sound-absorbing panel.

[0049] Its bulk density, bending failure load, noise reduction coefficient, thermal resistance, and combustion performance are all tested with reference to JC/T670-2005 standard. The result is: bulk density 350kg/m 3 , Bending failure load 80N, noise reduction coefficient 0.60, thermal resistance 0.60 (m 2 ·K)/W, combustion performance Class A is non-combustible.

Example Embodiment

[0050] Example 2

[0051] Fly ash fiber 93.5wt%

[0052] Vinyl acetate-ethylene copolymer emulsion (solid content 55wt%) 4.0wt%

[0053] Polyacrylamide cationic surfactant (cation degree 40%) 2.5wt%

[0054] The fly ash fiber is formulated into an aqueous slurry with a concentration of 1.5% by weight, and then the vinyl acetate-ethylene copolymer emulsion and polyacrylamide cationic surfactant are added, stirred and dispersed evenly, and poured into a mold, and squeezed to remove excess The moisture content, get wet body. In the drying process, embossing and other treatments are performed on the wet blank board, and the fly ash fiber insulation sound-absorbing board can be obtained after drying. Its bulk density, bending failure load, noise reduction coefficient, thermal resistance, and combustion performance are all tested with reference to JC/T 670-2005 standard. The result is: bulk density 380kg/m 3 , Bending failure load 82N, noise reduction coefficient 0.45, thermal resistance 0.55 (m 2 ·K)/W, combustion performance Class A is non-combustible.

Example Embodiment

[0055] Example 3

[0056] Fly ash fiber 87.9wt%

[0057] Waterborne polyurethane (solid content 35wt%) 10.0wt%

[0058] Dodecyl dimethyl betaine 2.1wt%

[0059] The fly ash fiber is formulated into a water-based slurry with a concentration of 2.5wt%, then water-based polyurethane (solid content 35wt%) is added, and lauryl dimethyl betaine is added, stirred and dispersed, and then poured into a mold , Pressed into shape, after natural drying, through cutting edge, planing, spraying, drying and other procedures, finally get the fly ash fiber insulation sound-absorbing board. Its bulk density, bending failure load, noise reduction coefficient, thermal resistance, and combustion performance are all tested with reference to JC/T 670-2005 standard. The result is: bulk density 400kg/m 3 , Bending failure load 85N, noise reduction coefficient 0.65, thermal resistance 0.55 (m 2 ·K)/W, combustion performance Class A is non-combustible.

PUM

Property	Measurement	Unit
Bulk density	350.0	kg/m³
Bending failure load	80.0	N
Bulk density	380.0	kg/m³

Description & Claims & Application Information

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