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A kind of vacuum insulation board and its manufacturing method

A technology of vacuum heat insulation board and production method, which is applied in the direction of heat insulation protection pipelines, heat exchange equipment, heat preservation, etc., and can solve the problems of difficult vacuuming and easy blockage of vacuum pumps, etc.

Inactive Publication Date: 2017-11-07
BEIJING MINGTAI LANGFAN PRECISION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a vacuum insulation panel and a manufacturing method thereof, the vacuum insulation panel is made of pure SiO 2 Airgel is used as the core material, and SiO is wrapped with non-woven fabric 2 Aerogels, resolved containing SiO 2 Airgel vacuum insulation panels are difficult to vacuum and easy to block the technical problems of vacuum pumps. The normal temperature thermal conductivity of the vacuum insulation panels is as low as 0.0008w / (m.k) or less

Method used

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  • A kind of vacuum insulation board and its manufacturing method
  • A kind of vacuum insulation board and its manufacturing method
  • A kind of vacuum insulation board and its manufacturing method

Examples

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Embodiment 1

[0077] A vacuum heat insulation panel, the vacuum heat insulation panel comprises a core material, a non-woven bag and a gas barrier membrane bag, the core material is pure SiO 2 airgel, the pure SiO 2 The airgel contains a getter, the size of the vacuum insulation panel is 200mm×200mm×10mm, the non-woven bag wraps the core material, and the gas-barrier membrane bag wraps the non-woven bag and the core material The number of layers of the non-woven bag is 2, the single layer thickness is 20 μm, the pore size distribution is 0.26-2.23 μm, and the porosity is 75%; one bag surface of the gas barrier membrane bag is a polyester membrane, and the other bag surface is It is a composite film of aluminum foil and polyester diaphragm.

[0078] The non-woven bag is made by pure electrospinning process, and its secondary electron scanning electron microscope picture is as follows: image 3 As shown, it can be seen from the figure that the filter bag is formed by stacking nanofibers, an...

Embodiment 2

[0087] A vacuum heat insulation panel, the vacuum heat insulation panel comprises a core material, a non-woven bag and a gas barrier membrane bag, the core material is pure SiO 2 airgel, the pure SiO 2 The airgel contains a getter, the size of the vacuum insulation panel is 200mm×200mm×10mm, the non-woven bag wraps the core material, and the gas-barrier membrane bag wraps the non-woven bag and the core material The number of layers of the non-woven bag is 5, the thickness of a single layer is 40 μm, the pore size distribution is 0.20-2.10 μm, and the porosity is 70%; one bag surface of the gas barrier membrane bag is a polyester membrane, and the other bag surface is It is a composite film of aluminum foil and polyester diaphragm.

[0088] The non-woven bag is made by electrospinning and melt-blown composite technology, and the SEM images of the front and back are as follows Figure 4 with Figure 5 As shown, it can be seen from the figure that the pore size of the non-wove...

Embodiment 3

[0096] A vacuum heat insulation panel, the vacuum heat insulation panel comprises a core material, a non-woven bag and a gas barrier membrane bag, the core material is pure SiO 2 airgel, the pure SiO 2 The airgel contains a getter, the size of the vacuum insulation panel is 200mm×200mm×10mm, the non-woven bag wraps the core material, and the gas-barrier membrane bag wraps the non-woven bag and the core material The number of layers of the non-woven bag is 3, the single-layer thickness is 10 μm, the pore size distribution is 70-85 μm, and the porosity is 80%; one bag surface of the gas barrier membrane bag is a polyester membrane, and the other bag surface is Composite film of aluminum foil and polyester separator.

[0097] The manufacturing method of the vacuum insulation panel includes the following steps:

[0098] (1) Select SiO with a particle size distribution of 2.5-3.5mm, a pore diameter between 10-20nm, and a porosity greater than 90%. 2 Airgel, add a small amount of...

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Abstract

The invention provides a vacuum thermal isolation plate and a manufacturing method thereof. The vacuum thermal isolation plate comprises a core material and an air-blocking diaphragm bag, wherein the core material is a block body formed by pure SiO2 aerogel and a getter; the vacuum thermal isolation plate also comprises a filter bag used for preventing the SiO2 aerogel from being pumped out during vacuum-pumping; the filter bag is made of fiber, has the porosity of more than 70%, and has the aperture of 0.2-85 micrometers; the core material is wrapped by the filter bag; the filter bag and the core material are wrapped by the air-blocking diaphragm bag. The vacuum thermal isolation plate takes the block body formed by the pure SiO2 aerogel and the getter as the core material, so that the heat conductivity coefficient of the vacuum thermal isolation plate is less than 0.0008w / (m. k) at room temperature; the core material is wrapped by the filter bag which has the porosity of more than 70% and the aperture of 0.2-85 micrometers, so that the technical problems that the vacuum thermal isolation plate containing the SiO2 aerogel is hard to vacuumize, and a vacuum pump is easily blocked by the vacuum thermal isolation plate can be solved; the manufacturing method of the vacuum thermal isolation plate is simple, and industrialization promotion is facilitated.

Description

technical field [0001] The invention belongs to the technical field of heat insulation materials, and in particular relates to a vacuum heat insulation board and a manufacturing method thereof. Background technique [0002] Vacuum insulation panel (VIP panel for short) has been widely used in aerospace, home appliances and construction industries because of its thermal insulation performance far surpassing that of traditional foamed polyurethane, and the production and use of which do not use ODS substances. Thanks to its high vacuum and the synergistic effect of the core material with low thermal conductivity, the thermal conductivity of the VIP board is as low as 0.008w / (m.k) at room temperature. [0003] In order to further improve the thermal insulation of VIP panels and reduce energy consumption in industries such as aerospace, construction and home appliances, there are higher requirements for thermal insulation materials. Reducing the thermal conductivity of the core...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L59/065
CPCF16L59/065
Inventor 陈秀娟杨闯王忠王茂航
Owner BEIJING MINGTAI LANGFAN PRECISION EQUIP CO LTD
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