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vacuum insulation

A vacuum heat insulation material and core material technology, applied in the direction of heat insulation protection pipelines, heat exchange equipment, pipeline protection, etc., can solve the problems of difficult to obtain high-strength vacuum heat insulation materials, poor operability of core materials, etc. Good, full-strength effect

Active Publication Date: 2018-05-29
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the core material made of powder has poor handleability
In addition, when obtaining a molded body by pressure molding in order to obtain sufficient heat insulating performance, it is necessary to form a low-density molded body, so it is difficult to obtain a high-strength vacuum heat insulating material

Method used

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  • vacuum insulation
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] Fumed silica (trade name "Aerosil 300", specific surface area 300m 2 / g, Japan AEROSIL Co., Ltd., hereinafter the same) 40 parts by mass, and 3.4 parts by mass of sodium silicate No. 3 (Japanese: けい酸ソーダ No. 3) (manufactured by AGC Silicon Technology Co., Ltd.) with 22.9 parts by mass of ion-exchanged water (1.3 parts by mass in terms of solid content) diluted adhesive liquid was mixed. After that, 40 parts by mass of fumed silica and 20 parts by mass of M.S.GEL (manufactured by AGC Silicon Technology Co., Ltd.) as porous silica were added, and silica, magnesia, and calcium oxide fibers (commercial products) were further added as inorganic fibers. The name "Superwool (registered trademark) Plus) バルク", D30: 227 μm, D90: 902 μm, manufactured by Shin Nippon Thermal Ceramics Co., Ltd. (New Nippon Thermal Ceramics Co., Ltd.) 2 parts by mass, mixed with a mixer to obtain cores material.

[0125] The obtained core material was put into a mold, pressed and formed into a flat p...

Embodiment 2～7、10

[0128] A core material was obtained in the same manner as in Example 1 except that the composition of the core material was changed as shown in Table 1. Thereafter, using the obtained core material, the flexural strength, the flexural strength after instantaneous fracture, and the thermal conductivity of the vacuum heat insulating material of the obtained molded body were measured in the same manner as in Example 1. In addition, operability was evaluated.

Embodiment 8

[0130] Using a mixer, 37.5 parts by mass of fumed silica and 2.8 parts by mass of sodium silicate No. 3 (manufactured by AGC Silicon Technology Co., Ltd.) (1.1 parts by mass in terms of solid content) were diluted with 19.1 parts by mass of ion-exchanged water. The obtained adhesive solution was mixed. After that, 37.5 parts by mass of fumed silica and 8.3 parts by mass of M.S.GEL (manufactured by AGC Silicon Technology Co., Ltd.) as porous silica were added, and silica, magnesium oxide, and calcium oxide fibers (commercial products) were further added as inorganic fibers. Name "スーパーウール (Superwool (registered trademark) Plus) バルク", D30: 227 μm, D90: 902 μm, manufactured by Shin Nippon Thermal Ceramics Co., Ltd.) 4.2 parts by mass and graphite (trade name "CP.B", Nippon Black Lead Industry Co., Ltd. (Nippon Black Lead Industry)) 16.7 parts by mass were mixed with a mixer to obtain a core material.

[0131] Thereafter, using the obtained core material, the flexural strength, th...

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Abstract

The present invention provides a vacuum heat insulating material having sufficient strength and good handleability. The present invention relates to a vacuum heat insulating material (1), wherein a molded body (10) formed from a core material containing fumed silica powder and fibers is sealed under reduced pressure into an airtight outer bag ( In 12), the fiber length D30 of the fiber is not less than 100 μm, and the fiber length D90 of the fiber is not more than 20 mm, and the content ratio of fumed silica in the powder is not less than 70 mass %, relative to the The content rate of the said fiber is 2-30 mass parts with respect to 100 mass parts of total mass of powder.

Description

technical field [0001] The present invention relates to a vacuum heat insulating material having sufficient strength and good handleability. Background technique [0002] Vacuum insulation materials are used in various fields such as houses, buildings, vehicles, thermal insulation containers, refrigerators, and water heaters to reduce energy consumption through heat insulation. As a vacuum heat insulating material, the vacuum heat insulating material which uses powder and fiber as a core material and seals it in the outer bag under reduced pressure is known, for example. Compared with the vacuum insulation material using fiber as the core material, the vacuum insulation material using powder as the core material has inferior thermal insulation performance at the initial stage, but it can maintain sufficient insulation performance even in low vacuum, so it is durable for a long time Good sex. In addition, if powder is used as the core material, there is an advantage that it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L59/065B32B9/00
CPCB32B9/00F16L59/065F16L59/02B32B9/047B32B2305/026B32B2307/72B32B2307/304
Inventor 篠原伸广滨田裕也
Owner ASAHI GLASS CO LTD