Method for preparing nanometer glass fiber thermal insulation material by flame method

A technology of nano-glass fiber and thermal insulation materials, applied in the field of thermal insulation materials, can solve the problems of limited space, short service life, large structural pores, etc., and achieve the effects of cost control, production cost reduction, and smooth surface

Active Publication Date: 2010-04-14
宣汉正原微玻纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of curing molding, the fiber of the glass wool board is fluffy, the structural pores are large, the bearing capacity is poor, the product density is poor, the use space is limited, and it is easy to pulverize and the service life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The first step: the preparation method of ultrafine glass fiber

[0024] The preparation method of high-alkali glass: Melt the high-alkali glass ball at a high temperature of 1300 ° C, pass through the leak holes with a diameter of 1mm (the material of the leak plate is GH4755 alloy, and the nozzle is No. 22 zirconium corundum brick), and the diameter of the wire is controlled. At 20μm, the wire drawing speed is 2.5m / min, and then at a high temperature of 1600°C, the glass filament is made into a glass fiber below 3μm by the flame ejected from the combustion chamber (the volume ratio of air to natural gas is 10:1). The nozzle width is 10mm, the blowing air velocity is 800m / s, the cotton is collected, and the high-alkali glass fiber is obtained.

[0025] The preparation method of alkali-free glass fiber is the same as that of high-alkali glass fiber, the difference is that the melting temperature of alkali-free glass fiber is 1700°C, the diameter of the leakage hole is 0...

Embodiment 2

[0030] The preparation method is the same as that in Example 1, but in the second step, the composition of the mixed fiber is: the average diameter of 30% by weight is a high-alkali glass fiber of 3 μm, the average diameter of 30% by weight is a high-alkali glass fiber of 2 μm, 20 % by weight of high-alkali glass fibers with an average diameter of 0.5 μm and 20% by weight of non-alkali glass fibers with an average diameter of 0.3 μm.

Embodiment 3

[0032] The preparation method is the same as in Example 1, but in the second step, the composition of the mixed fiber is: the average diameter of 25% by weight is a high-alkali glass fiber of 3 μm, the average diameter of 40% by weight is a high-alkali glass fiber of 1 μm, 20 % by weight of high-alkali glass fibers with an average diameter of 0.3 μm and 15% by weight of non-alkali glass fibers with an average diameter of 0.1 μm.

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Abstract

The invention discloses a method for preparing a nanometer glass fiber thermal insulation material by a flame method. The method for preparing the nanometer glass fiber thermal insulation material comprises the following steps: (1) taking high-alkali glass beads or alkali-free glass beads as materials and adopting a flame injection-blowing technology to prepare glass fiber; (2) conducting pulping-dispersing on 25-30% by weight of high-alkali glass fiber with average diameter of 2-3mum, 30-40% by weight of high-alkali glass fiber with average diameter of 1-2mum, 20-30% by weight of high-alkali glass fiber with average diameter of 0.3-0.5mum and 15-20% by weight of alkali-free glass fiber with average diameter of 0.1-0.3mum; (3) conducting wet forming on pulp and then conducting suction dehydration; and (4) drying the obtained wet paper at the temperature of 200-300 DEG C, thus obtaining the product. The thermal insulation material has large specific surface area, low heat conduction coefficient and good thermal insulation effect; in addition, the thermal insulation material is natural raw mineral material and does not contain any hazardous substance.

Description

technical field [0001] The invention relates to a thermal insulation material, in particular to a method for preparing a flame-processed nano glass fiber thermal insulation material. Background technique [0002] Glass wool products have small bulk density, low thermal conductivity, good heat insulation, sound absorption, fire resistance, heat resistance, frost resistance, shock resistance, chemical stability, etc., convenient construction, low price, and are widely used in pipelines, high-grade high-temperature vessels, and external walls. Insulation, transportation, refrigerators, communications, aerospace and other fields are also the materials of choice for future energy-saving buildings. [0003] Glass wool is made of natural ore such as quartz sand, dolomite, wax stone, etc., and other chemical raw materials such as soda ash, boric acid, etc. fine fibrous material. According to its production method, it can be divided into three types: (1) Flame glass wool, which mak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/40C03B37/022D21D1/02D21F5/14D21F5/00
Inventor 陶伟秦大江刘军
Owner 宣汉正原微玻纤有限公司
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