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Radiation-resistant glass fiber and needled felt prepared from same

A glass fiber, radiation-resistant technology, applied in the direction of non-woven fabrics, textiles and paper, to achieve the effect of improving thermal insulation effect and construction efficiency, low moisture absorption, good elasticity and softness

Inactive Publication Date: 2015-01-21
SINOMA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems caused by the use of metal reflective heat preservation structures in the prior art, and provide a radiation-resistant glass fiber, so that the needle-punched felt made of it can withstand high temperature and radiation, and has a long service life

Method used

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  • Radiation-resistant glass fiber and needled felt prepared from same
  • Radiation-resistant glass fiber and needled felt prepared from same
  • Radiation-resistant glass fiber and needled felt prepared from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The raw material components of glass fiber are listed in Table 1. The fiber is drawn by a general-purpose crucible or pool kiln, and the glass fiber is drawn into a continuous strand with an average diameter of 7 μm, and the strand is chopped into a chopped strand with a length of 60 mm. , the chopped strands are carded, laid, and needle-punched to form a density of 65kg / m 3 Needle-punched felt, the material is placed in an environment of 50°C and humidity of 95% for 96h, the mass moisture absorption rate is 0, the thermal load shrinkage temperature of the fiber felt is 670°C, and the engineering thermal conductivity is 0.033W / m·K (50 ℃), 0.055W / m·K (200℃).

[0022] Table 1

[0023]

Embodiment 2

[0025] The raw material components of glass fiber are listed in Table 2. The fiber is drawn by a general-purpose crucible or pool kiln, and the glass fiber is drawn into a continuous strand with an average diameter of 6.9 μm, and the strand is chopped into a chopped strand with a length of 60 mm. Silk, chopped strands are carded, laid, and needle-punched to form a density of 72kg / m 3 Needle-punched felt, the material is placed in an environment of 50°C and humidity of 95% for 96h, the mass moisture absorption rate is 0, the thermal load shrinkage temperature of the fiber felt is 640°C, and the engineering thermal conductivity is 0.035W / m·K (50 ℃), 0.055W / m·K (200℃).

[0026] Table 2

[0027]

Embodiment 3

[0029] The raw material components of glass fiber are listed in Table 3. The fiber is drawn by a general-purpose crucible or pool kiln, and the glass fiber is drawn into a continuous strand with an average diameter of 9 μm, and the strand is chopped into a chopped strand with a length of 60 mm. , Chopped strands are formed with a density of 75kg / m after carding, laying, and acupuncture processes 3 Needle-punched felt, the material is placed in an environment of 50°C and humidity of 95% for 96h, the mass moisture absorption rate is 0, the thermal load shrinkage temperature of the fiber felt is 720°C, and the engineering thermal conductivity is 0.032W / m·K (50 ℃), 0.054W / m·K (200℃).

[0030] table 3

[0031]

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Abstract

The invention relates to a radiation-resistant glass fiber which is prepared from the following raw materials in percentage by mass: 50-60% of SiO2, 18-25% of Al2O3, 10-15% of MgO, 3-15% of CaO, 0-3.5% of BaO and 0-0.9% of inevitable impurities. The raw materials can be subjected to melting and wire drawing by using the existing melting furnace and wire drawing furnace made of refractory materials so as to produce the radiation-resistant glass fiber. The fiber is subjected to chopping, dehairing, mesh placement and needling to form the needled felt product with specific density. The needled felt product has favorable producibility and is suitable for industrial continuous production. The radiation-resistant glass fiber needled felt can be used as a heat insulating material in a nuclear radiation envelopment, and has the characteristics of high temperature resistance, light weight, high flexibility, high installability and the like.

Description

technical field [0001] The invention relates to a radiation-resistant glass fiber and thermal insulation material products made of it. Background technique [0002] With the promulgation of the national nuclear power medium and long-term development plan, my country will vigorously develop pressurized water reactor nuclear power plants for a long time in the future. When the reactor pressure vessel and the main pipeline of the nuclear power plant are in normal operation, it is required to isolate the heat emitted from the high-temperature outer surface to reduce the loss of heat dissipation. It is necessary to install an insulation layer so that the heat generated by the pressure vessel can be effectively used for power generation. This requires that the insulation layer material not only be able to withstand high temperature, but also be able to operate under harsh conditions such as strong neutron radiation, and to ensure long-term use without failure. At present, the ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C13/00D04H1/4218D04H1/46D04H1/72
CPCC03C3/085C03C3/087C03C13/00D04H1/4218D04H1/46D04H1/72
Inventor 张焱祖群黄松林刘劲松
Owner SINOMA SCI & TECH
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