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Glass wool with low heat conduction coefficient

A technology of thermal conductivity and glass wool, which is applied in the field of thermal insulation materials, can solve problems such as the lack of suitable materials for thermal insulation, long-term planning and development, and unfavorable social sustainable development.

Inactive Publication Date: 2015-12-09
世纪良基集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The improvement of energy-saving standards has led to the fact that the existing glass wool with a thickness of 2cm on the market can no longer meet the requirements; and most glass wool enterprises have adopted the method of increasing the thickness of glass wool at the expense of the effective volume of the building, which is bound to significantly affect the production and installation systems. Adjustment consumes a lot of manpower, material resources, and financial resources, and it is also contrary to the long-term planning and development of national building energy conservation, which is not conducive to the sustainable development of society
In addition, there is no suitable material for thermal insulation of parts with narrow space and complicated pipelines.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] nano-SiO 2 , has the following basic properties: the specific surface area is 200±25m 2 / g; loss on drying is 1% (drying at 100°C for 2h); loss on ignition is 4% (burning at 1000°C for 2h); purity is 99.8%; pH value of suspension is 3.7~4.7 (4% water suspension Turbid liquid); the bulk density is 50g / L; the particle size range is 10nm to 20nm; the average particle size is about 15nm.

[0099] 11g of nano-SiO 2 Add it into 73g of the above-mentioned glass fibers, and stir for 1 hour at a speed of 100r / min, so that the nanoparticles are evenly attached to the surface of the glass fibers, and a composite of nanoparticles and glass fibers is obtained.

[0100] Spray 8g of acrylic resin binder (provided by the factory for direct spraying) into the composite of the above-mentioned nanoparticles and glass fibers, and then put it into a mold and use a YES-300 pressure testing machine for compression molding. During the pressing process, the pressure was first applied slowly ...

Embodiment 2

[0103] In addition to adding 5.5g of nano-SiO 2 The same method as in Example 1 was used to prepare the glass wool of the present invention except for 5.5 g of silicon carbide (with a particle size ranging from 2 μm to 4 μm; an average particle size of about 3 μm).

[0104] The results of the back temperature test were as follows: image 3 shown. It can be seen that the maximum temperature difference between the hot surface and the cold surface 3 of the glass wool is 131 degrees, and the gap tends to widen.

Embodiment 3

[0106] In addition to adding 5.5g of nano-SiO 2 , 5.0g of silicon carbide (the particle size range is 2μm~4μm; the average particle size is about 3μm), 0.5g nano-Al 2 o 3 (The average particle diameter is about 30nm~about 50nm), adopt the same method as Example 1 to prepare the glass wool of the present invention.

[0107] The results of the back temperature test show that the thermal insulation effect of the glass wool is better than that of Example 2.

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Abstract

The invention belongs to a field of the insulation technology, and more specifically relates to a glass wool with low heat conduction coefficient. The glass wool of the present invention contains multiple glass fibres, and surfaces of the glass fibres are attached with nanoparticles; the average particle size of the nanoparticles is more than 0nm and less than or equal to about 100nm; the weight of the nanoparticle is less than or equal to 20% of the weight of the glass fibre; the nanoparticle contains nano SiO2; the nanoparticle is blended with infrared opacifier particles; the infrared opacifier particles include SiC particles, BN particles, ZrSiO4 particles or KT6 particles. According to the glass wool of the present invention, nanoparticles are attached to the surfaces of the glass fibres, so that surface contact between the glass wool and the glass fibre in prior art is changed into point contact between nanoparticles of the invention, thereby substantially reducing thermal conduction of the glass wool, ensuring the glass wool has a low heat conduction coefficient. Compared with the glass wool of the prior art, in the prerequisite with same thickness, a warming plate prepared by the glass wool of the present invention can substantially improve insulation and heat insulation effect of the warming plate.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, and relates to a glass wool, more specifically, the invention relates to a glass wool with a low thermal conductivity. Background technique [0002] Glass wool belongs to a category of glass fibers and is a man-made inorganic fiber. Glass wool is a material made of molten glass fibrosis to form a cotton-like material. Its chemical composition belongs to glass and is an inorganic fiber. It has good formability, small bulk density, low thermal conductivity, thermal insulation, good sound absorption performance, corrosion resistance, and stable chemical properties. [0003] There are two types of glass wool currently on the market: white formaldehyde-free glass wool and yellow phenolic resin glass wool. White formaldehyde-free glass wool is mainly made of waste glass, which is melted, centrifuged, blown into cotton, and then formaldehyde-free acrylic resin is used as a binder to make gl...

Claims

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Application Information

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IPC IPC(8): C03C13/02
Inventor 郑忠清倪文陈德平姬军
Owner 世纪良基集团有限公司
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