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Preparation method of vacuum heat insulating plate

A technology of vacuum heat insulation boards and products, which is applied in the manufacture of tools, ceramic molding machines, etc., can solve the problems of unsatisfactory construction fields, short service life, and poor fireproof performance, and achieve good fireproof performance, long service life and low cost. Effect

Inactive Publication Date: 2012-10-17
袁江涛 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vacuum insulation panels using heat-resistant insulation fiber as the core material are mostly used in refrigerators and refrigeration and heat preservation fields. Their main features are their low initial thermal conductivity and short service life. Once the vacuum is lost, it is easy to cause a bulge
The use of polyurethane and other materials as the core material cannot meet the needs of the construction field due to its poor fire resistance

Method used

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  • Preparation method of vacuum heat insulating plate
  • Preparation method of vacuum heat insulating plate

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Put the precipitated silica, titanium dioxide (titanium dioxide), and polyester fiber into the mixer at a ratio (mass ratio) of 50:5:1 in sequence, and stir for 5 minutes to obtain a mixture. The silo is located under the mixer. Open the feed valve of the mixer, and the mixture will leak into the silo. The mixture in the silo is sent to the mold in the cold press by vacuum suction. After the mixture is filled with the mold, the mixture is pressed with a pressure of 2 MPa, and the core material is obtained after compression molding. Put the core material into the dryer and bake at a temperature of 100 degrees Celsius for 60 minutes. Put the baked core material into a non-woven bag for seamless wrapping, then put the non-woven wrapped core material into a multi-layer composite aluminum foil bag, and send it to the vacuum equipment to 0.1 Pascal to seal. The resulting vacuum insulation panel has a density of 400kg / m 3 , the tested thermal conductivity reaches 0.0058W / mk...

Embodiment 2

[0019] Put fumed silica, carbon black, and polypropylene fiber into the mixer in a ratio of 50:25:1 (mass ratio), stir for 5 minutes, and heat the stirring tank of the stirring equipment at a temperature of 94 to 105 degrees Celsius while stirring , to obtain the mixture. The silo is located under the mixer. Open the feed valve of the mixer, and the mixture will leak into the silo. The mixture in the silo is sent to the mold in the cold press by vacuum suction. After the mixture is filled with the mold, the mixture is pressed with a pressure of 1.6 MPa, and the core material is obtained after compression molding. Put the core material into the dryer and bake at a temperature of 110 degrees Celsius for 50 minutes. Put the baked core material into POF film (multi-layer co-extruded polyolefin heat shrinkable film) for seamless wrapping, then put the core material wrapped by POF film into an aluminum foil bag with glass fiber on the surface, and send it to Into the vacuum equip...

Embodiment 3

[0021] Precipitated silica, silicon carbide, and glass fiber were heated and baked at 94-105 degrees Celsius for more than 5 minutes at a ratio (mass ratio) of 50:5:10, and then put into the mixer in turn, and after stirring for 5 minutes, the obtained Mixture. The silo is located under the mixer. Open the feed valve of the mixer, and the mixture will leak into the silo. The mixture in the silo is sent to the mold in the cold press by vacuum suction. After the mixture is filled with the mold, the mixture is pressed with a pressure of 1.6 MPa, and the core material is obtained after compression molding. Put the core material into the dryer and bake at 100 degrees for 50 minutes. Put the baked core material into a non-woven bag for seamless wrapping, then put the non-woven wrapped core material into a multi-layer composite aluminum foil bag, and send it to the vacuum equipment to 0.1 Pascal to seal. The obtained product density is 383kg / m 3 , the tested thermal conductivity ...

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Abstract

The invention discloses a preparation method of a vacuum heat insulating plate. The preparation method comprises the following steps of: (1) placing main materials containing over 98% of silica content, a radiation separating agent and reinforced fibers which are weighted based on ratio into agitating equipment for agitating to obtain a mixture material; (2) transmitting the mixture material into a die; (3) pressing the mixture material in the die at 0.4 to 2MPa to form a core material; (4) parching the core material for 10 to 120 minutes at 100 to 300 DEG C; (5) arranging the core material prepared in step (4) into a ventilate and powder-out-of-permeating material for wrapping without seam, and placing the wrapped core material into a bag made of a high carrier material so as to obtain the product; and (6) processing the product in step (5) by pumping vacuum and sealing the port. The preparation method has the advantage that the prepared product has high fire resistance, low thermal conductivity coefficient, long service life, low cost, and simplicity in preparation technology.

Description

technical field [0001] The invention relates to the technical field of heat insulation board preparation, in particular to a preparation method of a vacuum heat insulation board. Background technique [0002] At present, vacuum insulation panels are widely used in refrigerators, buildings, industrial insulation and other fields. The prior art mainly has the characteristics of high price, complex production process, and poor fireproof performance. The materials mainly used in the prior art in this field include: 1. Heat-resistant and heat-insulating fiber, see Chinese Patent No.: 200610021567.2 "Vacuum Insulation Panel and Preparation Method"; 2. Open-cell polyurethane, see Chinese Patent No. 00106049.X " Method for making a core of vacuum insulation material". Vacuum insulation panels using heat-resistant insulation fibers as core materials are mostly used in refrigerators and refrigeration insulation fields. Their main features are their low initial thermal conductivity a...

Claims

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Application Information

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IPC IPC(8): B28B1/52B28B3/00C04B30/00
Inventor 袁江涛王海成
Owner 袁江涛
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