A kind of vacuum insulation material and its preparation method

A vacuum thermal insulation material and thermal insulation technology, applied in heat exchange equipment, chemical instruments and methods, mechanical equipment, etc., can solve problems such as low thermal conductivity, achieve high bonding strength, reduce overall thermal conductivity, and reduce the effect of heat conduction area

Active Publication Date: 2022-04-05
安徽蓝格利通新材应用股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention: under the premise of a certain thickness, using the lamination of the honeycomb structure to make the VIP have better damage resistance performance, and at the same time solve the thermal bridge effect caused by the honeycomb structure, improve the mechanical strength of the VIP and keep it low. Thermal Conductivity

Method used

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  • A kind of vacuum insulation material and its preparation method
  • A kind of vacuum insulation material and its preparation method
  • A kind of vacuum insulation material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Vacuum insulation panels were prepared as follows:

[0036] (A) Add the silica airgel powder into the epoxy resin according to the mass fraction of silica airgel in the thermal insulation adhesive of 0.1wt%, and stir slowly for later use; the silica airgel The particle size is 0.1-0.3mm, the porosity of the airgel is >90%, the pore size is 30nm, and the bulk density is 0.035g / cm 3 , specific surface area 1100m 2 / g. Due to the low density of silica airgel, too much addition will lead to degumming between the subsequent vacuum column compartments, and the mechanical strength of the airgel is poor, and too much addition will also lead to a decrease in the overall strength of the plate.

[0037] (B) put alkali-free short glass fiber and 4080 fiber into the cotton blender in a weight ratio of 7.5:2.5; the average length of the alkali-free short glass fiber and 4080 fiber is 50mm; enter the carding machine after mixing fiber; then put the mixed fiber into the c...

Embodiment 2

[0042] Example 2: Vacuum insulation panels were prepared as follows:

[0043](A) Add the silica airgel powder into the epoxy resin according to the mass fraction of the silica airgel accounting for the thermal insulation adhesive of 2.5wt%, and stir it slowly for later use; the silica airgel The particle size is 0.1-0.3mm, the porosity of the airgel is >90%, the pore size is 30nm, and the bulk density is 0.035g / cm 3 , specific surface area 1100m 2 / g.

[0044] (B) put alkali-free short glass fiber and 4080 fiber into the cotton blending machine in a weight ratio of 7:2; the average length of the alkali-free short glass fiber and 4080 fiber is 50mm; enter the carding machine after mixing fiber; then put the mixed fiber into the cotton paver according to the thickness of 5mm, 1100g / m 2 Cotton-spread areal density; after drying at 170°C, heat-press molding to obtain the glass fiber core layer.

[0045] (C) Preparation of vacuum column compartment: Lay a layer of copper foil w...

Embodiment 3

[0049] Example 3: Vacuum insulation panels were prepared as follows:

[0050] (A) Add the silica airgel powder into the epoxy resin according to the mass fraction of the silica airgel accounting for the thermal insulation adhesive of 1.3wt%, and stir it slowly for later use; the silica airgel The particle size is 0.1-0.3mm, the porosity of the airgel is >90%, the pore size is 30nm, and the bulk density is 0.035g / cm 3 , specific surface area 1100m 2 / g.

[0051] (B) put alkali-free short glass fiber and 4080 fiber into the cotton blending machine in a weight ratio of 6:4; the average length of the alkali-free short glass fiber and 4080 fiber is 50mm; enter the carding machine after mixing fiber; then put the mixed fiber into the cotton paver according to the thickness of 2mm, 500g / m 2 Cotton-spread areal density; after drying at 170°C, heat-press molding to obtain the glass fiber core layer.

[0052] (C) Preparation of the vacuum column compartment: Lay a layer of copper fo...

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Abstract

The invention discloses a vacuum heat insulation material and a preparation method thereof. It is composed of at least two layers of honeycomb plates laminated, and adjacent honeycomb plates are interlaced and bonded. Both ends of the honeycomb plates are provided with foam heat insulation parts. The honeycomb plate is composed of several hexagonal vacuum column compartments of the same specification bonded by heat-insulating adhesives. The vacuum column compartment is composed of a core material with a laminated structure and a high barrier film wrapping the core material. The longitudinal direction of the core material is There are several layers of copper foil at equal intervals, the heat-insulating adhesive is glue mixed with silica airgel, and the outermost layer of the vacuum heat-insulating material is plastic-sealed with a shaping film. The staggered laminated structure of the honeycomb board, the addition of heat-insulating airgel to the heat-insulating adhesive, and the laying of several copper foils in the core material can effectively reduce the thermal bridge effect inside the honeycomb structure, effectively reducing the overall thermal conductivity of the material, and the heat insulation Excellent performance.

Description

technical field [0001] The invention relates to the field of vacuum heat insulation panels, in particular to a vacuum heat insulation material and a preparation method thereof. Background technique [0002] Vacuum insulation panel (VIP) is currently the most advanced high-efficiency insulation material in the world, and its thermal conductivity is only below 0.004w / m.k. The vacuum insulation panel adopts the principle of vacuum heat insulation. It is composed of core heat insulation material and closed air barrier film. The filling core material is closely combined with the vacuum protection surface layer, which can effectively avoid heat transfer caused by air convection, and the thermal conductivity is greatly reduced. Achieve excellent thermal insulation effect. [0003] The existing vacuum insulation panels are mainly composed of three parts: 1. Insulation material (glass fiber, glass wool) for the core; 2. Gas adsorption material (getter); 3. Composite film with high b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/20B32B15/14B32B17/02B32B27/30B32B3/12B32B3/08B32B7/12B32B27/36B32B33/00B32B37/12F16L59/065C09J11/04
CPCB32B15/20B32B15/14B32B5/02B32B27/304B32B3/12B32B3/08B32B7/12B32B27/36B32B33/00B32B37/12F16L59/065C09J11/04B32B2262/101B32B2307/304C08K7/26
Inventor 章健汪申学曹仁慧
Owner 安徽蓝格利通新材应用股份有限公司
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