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Method for preparing heat-insulating board for building wall

A technology for thermal insulation boards and buildings, applied in the field of building materials, can solve the problems of rusting of steel wire protection nets, reduced thermal insulation performance, reduced product strength, etc., and achieves the effects of good waterproof performance and strength, maintaining thermal conductivity, and stabilizing thermal conductivity.

Inactive Publication Date: 2007-06-27
闻峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of this prior art is: 1, directly used sodium silicate aqueous solution and organosilicon water-repellent in the formula of prior art, these two kinds of raw materials all are very dilute aqueous solution, after mixing and stirring with perlite etc. The moisture content is relatively large, so that the drying and dehydration stage after molding requires a higher temperature and a longer drying time, which increases the cost of the product
2. Sodium silicate and organic silicon water repellent are both highly alkaline materials, which make the product highly alkaline. As the outer layer of the building insulation system, it is easy to be damp and return to alkali, which will affect the appearance of the outer wall. At the same time, it is easy to rust the steel wire protective net on the outer layer, and make the glass fiber net aging and lose its reinforcing effect.
3. Sodium silicate aqueous solution is used as a binder, and the water resistance after film formation is poor, and it is easy to deliquescence and water seepage, which affects the strength and weather resistance of the product
4. Expanded perlite is used as the main thermal insulation material. Due to the expansion of ore sand during vaporization and crystallization water overflows, perlite has an open-pore particle structure and is easily crushed to form powder. The strength is very low, which reduces the strength of the product. It is easy to absorb water vapor, and the insulation performance of the product will be greatly reduced after moisture absorption
5. During the mixing process of preparing the product, since the perlite is easily broken to form powder, the mixing time should not be too long, but if the mixing time is too short, the glue and the perlite cannot be fully mixed, and there will be a considerable amount of perlite surface that is not Can be fully wrapped by glue, thus affecting the strength of the product, easy to break and break
6. A layer of glass fiber mesh is adhered to the surface of the insulation board. Single-sided glass fiber mesh cannot completely guarantee that the product will not be broken or damaged, because the external force causing the fracture is uncertain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Get 68 parts of vitrified microbeads and 17 parts of light calcium carbonate to mix, and stir evenly;

[0040] (2) Add 2 parts of redispersible rubber powder, 0.2 part of polypropylene fiber, 0.2 part of wood fiber and 0.6 part of carboxymethyl cellulose into the above mixture in turn, and stir evenly;

[0041] (3) Add 12 parts of water to the above-mentioned prepared dry mixture while stirring, and after spraying and stirring, the molding material is semi-dry and uniformly mixed;

[0042] (4) put the above-mentioned materials into the mould, pressurize 350KN, and keep the pressure for 10 seconds, demoulding;

[0043] (5) Dry at 60° C. for 3 hours to obtain the finished product.

Embodiment 2

[0045] (1) Get 56.5 parts of vitrified microbeads and 26 parts of light calcium carbonate to mix, and stir evenly;

[0046] (2) Add 1.5 parts of redispersible rubber powder, 0.3 parts of polypropylene fiber, 0.3 part of wood fiber and 0.4 part of carboxymethyl cellulose to the above mixture in sequence, and stir evenly;

[0047] (3) Add 15 parts of water to the above-mentioned prepared dry mixture while stirring, and after spraying and stirring, the molding material is semi-dry and uniformly mixed;

[0048] (4) Put the above materials into the mould, pressurize 400KN, and keep the pressure for 7 seconds, demoulding;

[0049] (5) Drying at 65° C. for 3 hours to obtain the finished product.

Embodiment 3

[0051] (1) Get 70 parts of vitrified microbeads and 13 parts of light calcium carbonate to mix, and stir evenly;

[0052] (2) Add 3 parts of redispersible rubber powder, 0.1 part of polypropylene fiber, 0.1 part of wood fiber and 0.8 part of carboxymethyl cellulose to the above mixture in sequence, and stir evenly;

[0053] (3) Add 13 parts of water to the above-mentioned prepared dry mixture while stirring, and after spraying and stirring, the molding material is semi-dry and uniformly mixed;

[0054](4) Put the above-mentioned materials into the mould, pressurize 500KN, and keep the pressure for 5 seconds, demoulding;

[0055] (5) Dry at 80° C. for 2 hours to obtain the finished product.

[0056] In the preparation method of the present invention, the raw materials can be sent to the mixer with a screw conveyor, and during the conveying process of the raw materials, redispersible rubber powder, polypropylene fiber, wood fiber, hydroxymethyl cellulose, etc. are sequentially ...

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Abstract

The invention relates to a process for making heat-insulating board in architecture thermal insulation system, which comprises using vitrified pearl, light calcium carbonate, dispersable rubber powder, polypropylene fiber, wood fibre, sodium carboxymethyl cellulose and water as raw material through agitating homogeneously, charging water, spraying water and stirring, compacting and loading into molds, pressurizing demoulding and drying.

Description

technical field [0001] The invention relates to a preparation method of a building wall insulation board, which belongs to the technical field of building materials. Background technique [0002] At present, the commonly used thermal insulation system of building envelope structure mostly adopts thermal insulation materials such as polystyrene foam board, thermal insulation mortar, polyurethane rigid foam, glass wool and rock wool. The Chinese patent application titled "High-strength refractory plant fiber composite thermal insulation board and its production method" with application number 200410000789.7 discloses a composition and preparation method of a refractory thermal insulation board. The main thermal insulation material is expanded perlite. The shortcoming of this prior art is: 1, directly used sodium silicate aqueous solution and organosilicon water-repellent in the formula of prior art, these two kinds of raw materials all are very dilute aqueous solution, after m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/08C04B14/28C04B16/06C04B16/02
CPCY02W30/91
Inventor 闻峰
Owner 闻峰
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