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Preparation method of vacuum insulated panel with ultralow heat conductivity coefficient

A technology of vacuum insulation panels and thermal conductivity, applied in glass manufacturing equipment, manufacturing tools, glass furnace equipment, etc., can solve the problems of glass slag mixing, discrete diameter distribution, high energy consumption, etc., and achieve increased compressive strength and density Reduced effect

Inactive Publication Date: 2022-05-13
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flame method glass fiber diameter is finer, the average diameter can be as low as 1.0μm, but the diameter distribution is discrete, glass slag will be mixed in the preparation process, and the production efficiency is low and energy consumption is large, so it is gradually eliminated by the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] S1 Mixing: According to the composition requirements of centrifugal cotton, adjust the proportion of raw materials, put it into the mixer to be melted, the centrifugal cotton raw material of vacuum insulation board is calculated by mass percentage, including SiO 2 : 70-74%, Al 2 O 3 : 1-14%, CaO+MgO between 10.5-11%, Na 2 O+K 2 O≤16.4wt%; S2 melting: The melting process is divided into four stages according to the sequence of glass formation: silicate formation stage 800°C-1000°C, glass formation stage 1000°C-1200°C, glass clarification stage 1200°C ℃-1400℃, glass liquid homogenization stage 1300℃-1400℃, under the action of convection, diffusion, melting, etc., a transparent glass liquid with uniform composition and stable temperature is formed, and enters the forehearth; S3 cooling: According to the fiberization, the glass liquid is According to the requirements of temperature and viscosity, the glass liquid is cooled to the optimal temperature in the material chann...

Embodiment 2

[0017] S1 Mixing: According to the composition requirements of centrifugal cotton, adjust the proportion of raw materials, put it into the mixer to be melted, the centrifugal cotton raw material of vacuum insulation board is calculated by mass percentage, including SiO 2 : 70-74%, Al 2 O 3 : 1-14%, CaO+MgO between 10.5-11%, Na 2 O+K 2 O≤16.4wt%; S2 melting: The melting process is divided into four stages according to the sequence of glass formation: silicate formation stage 800°C-1000°C, glass formation stage 1000°C-1200°C, glass clarification stage 1200°C ℃-1400℃, glass liquid homogenization stage 1300℃-1400℃, under the action of convection, diffusion, melting, etc., a transparent glass liquid with uniform composition and stable temperature is formed, and enters the forehearth; S3 cooling: According to the fiberization, the glass liquid is According to the requirements of temperature and viscosity, the glass liquid is cooled to the optimal temperature in the material chann...

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Abstract

A preparation method of a vacuum insulated panel with an ultralow heat conductivity coefficient comprises the following steps: mixing, melting, cooling, fibration, cotton collection, hot pressing and shearing, the raw materials comprise the following components in percentage by mass: 70-74% of SiO2, 1-14% of Al2O3, 10.5-11% of CaO and MgO, less than or equal to 16.4% of Na2O and K2O, the viscosity of molten glass is 0.98-1.02 * 10 < 3 > dPa.s, the temperature is 1010 DEG C + / -50 DEG C, the rotating speed of a centrifugal pan is 2700-3500 rpm, and the temperature of the centrifugal pan is 270-3500 rpm. The flow rate of the molten glass is 140-200kg / h, the temperature of the hot pressing process is controlled within the range of 500 + / -25 DEG C, the pressure is controlled within 0.2-0.5 MPa, and the VIP core material with superfine fiber diameter, low heat conductivity coefficient and good air pressure sensitivity can be prepared.

Description

technical field [0001] The invention belongs to the technical field of functional composite materials, and relates to a preparation method of an ultra-low thermal conductivity vacuum insulation panel. technical background [0002] Glass wool prepared by centrifugal method and flame method is the mainstream raw material of fiber core material. Among them, the centrifugal method for preparing glass fiber has low energy consumption, high efficiency, easy availability of raw materials, and excellent comprehensive cost performance. It is the mainstream fiber core material. The diameter of flame glass fiber is thinner, and the average diameter can be as low as 1.0 μm, but the diameter distribution is discrete, glass slag will be mixed in the preparation process, and the production efficiency is low and the energy consumption is high, and it is gradually eliminated by the market. Studies have shown that the smaller the fiber diameter, the lower the thermal conductivity of the vacu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4218D04H1/558D04H1/559C03B37/04C03B5/16C03C13/00
CPCD04H1/4218D04H1/558D04H1/559C03B37/04C03B5/16C03C13/00
Inventor 周武中邱鑫杜源李杰董俐甜
Owner CHONGQING UNIV OF ARTS & SCI
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