Heat-insulation material and production method thereof

Patent metadata

Field	Value
Publication number	US-10042092-B2
Application number	US-201715642902-A
Country	US
Kind code	B2
Filing date	Jul 6, 2017
Priority date	Jul 22, 2016
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A heat-insulation material does not cause deterioration in heat-insulation performance and any loss of components included therein, and possesses an excellent radiation-preventing function. The heat-insulation material includes: a first heat-insulation layer that includes a first silica xerogel and a first radiation-preventing material; and a third heat-insulation layer that includes a third silica xerogel and second fibers, wherein the first heat-insulation layer and the third heat-insulation layer are layered. An electronic device includes the heat-insulation material. Yet further disclosed is a method for producing the heat-insulation material.

First claim

What is claimed is:

1. A heat-insulation material, comprising:
a first heat-insulation layer that includes a first silica xerogel and a first radiation-preventing material; and
a third heat-insulation layer that includes a third silica xerogel and second fibers, wherein the first heat-insulation layer and the third heat-insulation layer are layered,
wherein the first silica xerogel and the third silica xerogel have a mean pore size of about 10 nm to about 55 nm, and a pore volume of about 3.0 cc/g to about 10 cc/g.

2. A heat-insulation material, comprising:
a first heat-insulation layer that includes a first silica xerogel and a first radiation-preventing material;
a third heat-insulation layer that includes a third silica xerogel and second fibers, wherein the first heat-insulation layer and the third heat-insulation layer are layered; and
a second heat-insulation layer that includes a second xerogel, a second radiation-preventing material, and first fibers, wherein the second heat-insulation layer is placed between the first heat-insulation layer and the third heat-insulation layer.

3. The heat-insulation material according to claim 2 , wherein the first heat-insulation layer does not include the same type of fibers as the first fibers.

4. The heat-insulation material according to claim 2 , wherein the first heat-insulation layer does not include any fibers.

5. The heat-insulation material according to claim 2 , wherein the first fiber and the second fiber are the same type of fibers.

6. The heat-insulation material according to claim 2 , wherein the first radiation-preventing material and the second radiation-preventing material are the same type of radiation-preventing materials.

7. The heat-insulation material according to claim 2 , wherein the first heat-insulation layer and the second heat-insulation layer are each thinner than the third heat-insulation layer.

8. The heat-insulation material according to claim 2 , wherein the first heat-insulation layer, the second heat-insulation layer, and the third heat-insulation layer become thicker in this order.

9. An electronic device, comprising:
a circuit substrate;
a heat-generating component that is placed on the circuit substrate; and
the heat-insulation material according to claim 1 , wherein the heat-insulation material is placed such that the first heat-insulation layer faces the heat-generating component.

10. A method for producing a heat-insulation material, comprising:
(i) converting water glass or a silicic acid solution to a sol (a), and, providing a sol (b) that is prepared from the sol (a) and that includes a radiation-preventing material (p), and a sol (c) that is prepared from the sol (a) and that does not include the radiation-preventing material (p);
(ii) causing the sol (b) and the sol (c) to penetrate into at least one piece of unwoven fabrics;
(iii) converting the sol (b) and the sol (c) into gels;
(iv) aging the gels;
(v) soaking the gels in an acidic aqueous solution;
(vi) hydrophobizing the gels; and
(vii) drying the gels,
wherein the gels have a mean pore size of about 10 nm to about 55 nm, and a pore volume of about 3.0 cc/g to about 10 cc/g.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Wada Tooru
• Sakatani Shigeaki

Classifications

• B32B2262/108

  Rockwool fibres · CPC title

• B32B2255/02

  on fibrous or filamentary layer · CPC title

• H05K1/0201

  Thermal arrangements, e.g. for cooling, heating or preventing overheating · CPC title

• B32B2307/304

  Insulating · CPC title

• B32B2262/101

  Glass fibres · CPC title