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Vacuum heat insulation material and cold reserving apparatus with the same

A technology of vacuum insulation materials and equipment, which can be used in heat exchange equipment, mechanical equipment, and pipelines through thermal insulation protection, etc., and can solve the problems of reduced thermal insulation performance and insufficient gas barrier properties.

Active Publication Date: 2007-05-09
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing packaging materials are not suitable as outer packaging materials for vacuum insulation materials due to insufficient gas barrier properties and thermal insulation performance decreases with the passage of time.

Method used

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  • Vacuum heat insulation material and cold reserving apparatus with the same
  • Vacuum heat insulation material and cold reserving apparatus with the same
  • Vacuum heat insulation material and cold reserving apparatus with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0248] The polyurethane resin constituting the adhesive layer 26 shown in FIG. 10 is a polyurethane resin containing a modified product of aliphatic polyester polyol and hexamethylene diisocyanate (HDI) which is an aliphatic polyisocyanate.

[0249] At this time, the elastic modulus of the polyurethane resin of the adhesive layer 26 is smaller than the elastic modulus of each film constituting the outer cover material 13 . In addition, the surface hardness of the polyurethane resin was lower at 20°C, 40, and there was no difference in surface hardness at 20°C and 0°C.

[0250] The vacuum heat insulating material having the above structure has no problems such as occurrence of pinholes and peeling of the outer covering material.

[0251] In addition, known aliphatic polyisocyanates can be used as the aliphatic polyisocyanate, but preferably hexamethylene diisocyanate (HDI), trimethylhexamethylene diisocyanate (TMDI), lysine diisocyanate (LDI), etc., are more preferably modifie...

Embodiment 2

[0254] The adhesive layer 26 in FIG. 10 is made of a polyurethane resin containing a modified form of isophorone diisocyanate (IPDI) which is an aliphatic polyester polyol and an alicyclic isocyanate. The compounding ratio is that the equivalent ratio of polyisocyanate to polyol is 2, and the polyisocyanate is excessive.

[0255] At this time, the elastic modulus of the urethane resin of the adhesive layer 26 is smaller than the elastic modulus of each film constituting the outer cover material 13 . In addition, the surface hardness of the polyurethane resin was as low as 40 at 20°C, and there was no difference in the surface hardness at 20°C and 0°C.

[0256] The vacuum heat insulating material having the above structure has no problems such as occurrence of pinholes and peeling of the outer covering material.

[0257] In addition, when an aliphatic isocyanate cannot be used, it is effective to use an alicyclic isocyanate appropriately. In this case, it is preferable that th...

Embodiment 3

[0261] The adhesive layer 26 is made of a polyurethane resin containing a modified form of aliphatic polyester polyol and dicyclohexylmethane diisocyanate (HMDI), which is an alicyclic isocyanate. The compounding ratio is that the equivalent ratio of polyisocyanate to polyol is 2, and the polyisocyanate is excessive.

[0262] At this time, the elastic modulus of the urethane resin of the adhesive layer 26 is smaller than the elastic modulus of each film constituting the outer cover material 13 . In addition, the surface hardness of the polyurethane resin was 45 (20° C.) and 46 (0° C.).

[0263] The vacuum heat insulating material having the above-mentioned structure does not have problems such as generation of pinholes and peeling of the outer covering material.

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Abstract

An outer coating material (13) of a vacuum heat insulation material is a layered body made by layering, with adhesive agent layers (25, 26) in between, a sealant layer (21), a metal layer (22), a first plastic film layer (23), and a second plastic film layer (24), in that order from the inner side. When the vacuum heat insulation material is pierced by a foreign object, one layer in the inside of the layered body shuts off propagation of breakage caused by the piercing to prevent production of a through pin hole. By use of the outer coating material with high gas barrier ability and excellent pin hole resistance against piercing by a fine foreign object, a high-quality vacuum heat insulation material capable of maintaining excellent heat insulation performance for a long period is obtained.

Description

technical field [0001] The present invention relates to a vacuum heat insulating material which is composed of a core material and an outer wrapping material, the core material is covered by the outer wrapping material, and the inside has been decompressed and hermetically sealed. Background technique [0002] In recent years, energy issues and environmental issues have become urgent issues, and methods for effectively utilizing energy have been studied in various ways. [0003] One of the issues that has attracted attention is the energy saving of home appliances such as refrigerators, which are household appliances. In order to achieve energy saving in refrigerators, it is necessary to effectively use cold and heat, and it is an effective way to increase the heat insulation of the heat-insulating box that constitutes the refrigerator frame. For this reason, it is effective to use a heat insulating material having high heat insulating performance for the heat insulating bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L59/065B32B15/08
Inventor 天良智尚桥田昌道桥本一夫
Owner PANASONIC CORP
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