Vacuum insulation panel and preparation method and application thereof

A vacuum insulation panel and vacuuming technology, applied in applications, heat exchange equipment, other household appliances, etc., can solve problems such as affecting building quality, affecting vacuum degree, and long vacuuming time, achieving process tact optimization and improving production efficiency. , the effect of reducing the loss rate

Pending Publication Date: 2021-11-02
FIRST NEW MATERIAL TECH DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the use of the vacuum insulation panel obtained by this method, once the sealed bag is punctured or leaked, the vacuum cannot be maintained, the effect of atmospheric pressure disappears, and fibers and (or) particles are easily deposited on the bottom of the bag under the action of gravity, resulting in Bulging bag, which will easily cause the wall to fall off, seriously affecting the quality of the building
[0005] 202110648697.3 discloses a vacuum insulation panel and its preparation method and application. By adding two-component glue to the middle core layer, it avoids the phenomenon that the vacuum degree is difficult to maintain and the expansion bag falls off, and can greatly improve the service life of the vacuum insulation panel. However, this method adds an adhesive to the powder during processing, puts it into a barrier packaging bag after mixing, and then vacuumizes it after high-pressure compression molding, which will easily cause damage to the barrier packaging bag, affect the vacuum degree, and will be damaged due to the two-component adhesive. The high content of small molecular substances in the product will cause the vacuuming time to be too long during the production process, which will affect the production efficiency and is not conducive to mass industrial production

Method used

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  • Vacuum insulation panel and preparation method and application thereof
  • Vacuum insulation panel and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing a vacuum insulation panel, the method comprising the steps of:

[0049] (1) Dry glass fiber mat and silica powder at 180°C for 1 hour to obtain glass fiber mat and silica powder with a water content of 0.4%; 70 parts by weight of dried glass fiber mat (50 μm in diameter, Weifang Sanyu New Material Co., Ltd.), 30 parts by weight of dried silicon dioxide powder (Nanjing Baoket New Material Co., Ltd.) and 5 parts by weight of hot melt adhesive (EVA type hot melt adhesive, melting point is 60 ° C) mixed, Put it under a hydraulic press and press it under a pressure of 2Mpa, and then cut it into a core material of 400×600mm;

[0050] (2) Put the core material obtained in step (1) in a barrier packaging bag, vacuumize it so that the vacuum degree is 20Pa, heat seal it, heat it in an oven at 110°C for 0.1h, cool and solidify, and obtain the vacuum insulation panel .

Embodiment 2

[0052] A method for preparing a vacuum insulation panel, the method comprising the steps of:

[0053] (1) Dry glass fiber mat and silica powder at 230°C for 0.5h to obtain glass fiber mat and silica powder with a moisture content of 0.5%; 70 parts by weight of dried glass fiber mat (50 μm in diameter, Weifang Sanyu New Material Co., Ltd.), 30 parts by weight of dried silica powder (Nanjing Baoket New Material Co., Ltd.) and 10 parts by weight of hot melt adhesive (TPU type hot melt adhesive, melting point is 68 ° C) mixed , Put it under the hydraulic press and press it under the pressure of 2Mpa, and then cut it into the core material of 400×600mm;

[0054] (2) Put the core material obtained in step (1) in a barrier packaging bag, vacuumize to a vacuum degree of 0.1 Pa, heat seal, and heat-treat in an oven at 90° C. for 2 hours to obtain the vacuum insulation panel.

Embodiment 3

[0056] A method for preparing a vacuum insulation panel, the method comprising the steps of:

[0057] (1) Dry glass fiber mat and silica powder at 190°C for 1 hour to obtain glass fiber mat and silica powder with a water content of 0.4%; 70 parts by weight of dried glass fiber mat (50 μm in diameter, Weifang Sanyu New Material Co., Ltd.), 30 parts by weight of dried silicon dioxide powder (Nanjing Baoket New Material Co., Ltd.) and 7.5 parts by weight of hot melt adhesive (TPU type hot melt adhesive, melting point is 68 ° C) mixed, Put it under a hydraulic press and press it under a pressure of 3Mpa, and then cut it into a core material of 400×600mm;

[0058] (2) Put the core material obtained in step (1) in a barrier packaging bag, vacuumize to a vacuum degree of 10 Pa, heat seal, and heat-treat in an oven at 100° C. for 1 hour to obtain the vacuum insulation panel.

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Abstract

The invention provides a vacuum insulation panel and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a thermal insulation material and a hot melt adhesive, and carrying out compression molding to obtain a core material; and (2) putting the core material obtained in the step (1) into a barrier packaging bag, vacuumizing, sealing and carrying out heat treatment to obtain the vacuum insulation panel. The hot melt adhesive and the thermal insulation material are firstly pressed and formed to obtain the core material, in the heat treatment process, the core material and the core material and the barrier packaging bag can be bonded and fixed together through the hot melt adhesive in the core material, the step of pressing and forming the core material with the barrier packaging bag in a traditional manufacturing method is avoided, the breakage rate of the barrier packaging bag is effectively reduced, and the product qualification rate and the production efficiency are improved, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation panels, and in particular relates to a vacuum thermal insulation panel and its preparation method and application. Background technique [0002] Vacuum insulation panels are a new type of thermal insulation material that integrates high efficiency and energy saving. The thermal conductivity is only 4-8mW / m K, which is the product with the lowest thermal conductivity at present, but the short service life is the main factor affecting market acceptance. The reason: the traditional vacuum insulation panel, with the extension of time, the vacuum degree gradually decreases, and at the same time of the urban heat preservation effect, it will also cause the bonding between the panel and the wall to fail and fall off, resulting in frequent quality problems of the external wall . [0003] Therefore, research on vacuum insulation panels has also been ongoing. CN102102796A discloses a vacuum ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L59/02F16L59/04F16L59/065B29C70/02B29L7/00
CPCF16L59/028F16L59/04F16L59/065B29C70/025B29L2007/002
Inventor 刘东华闫达祁小堂孟超马芳胡洋
Owner FIRST NEW MATERIAL TECH DEV
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