Heat insulating material and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2021332932-A1
Application number	US-202117371132-A
Country	US
Kind code	A1
Filing date	Jul 9, 2021
Priority date	Mar 12, 2020
Publication date	Oct 28, 2021
Grant date	—

Abstract

A heat insulating material (1) includes a heat insulating layer (10) which has a porous structural body, a reinforcing fiber, and nanoparticles of a metal oxide used as a binder, wherein the porous structural body has a skeleton formed by connecting a plurality of particles, has pores inside, and has a hydrophobic portion on at least one surface between a surface and an inside of the porous structural body. The heat insulating layer (10) has a mass loss rate of 10% or less in thermogravimetric analysis held at 500° C. for 30 minutes.

First claim

What is claimed is:

1 . A heat insulating material, comprising:
a heat insulating layer, wherein the heat insulating layer comprising:
a porous structural body, wherein the porous structural body has a skeleton formed by connecting a plurality of particles, has pores inside, and has a hydrophobic portion on at least one surface between a surface and an inside of the porous structural body,
a reinforcing fiber, and
nanoparticles of a metal oxide used as a binder, and
wherein the heat insulating layer has a mass loss rate of 10% or less in thermogravimetric analysis held at 500° C. for 30 minutes.

2 . The heat insulating material according to claim 1 , wherein the nanoparticles of the metal oxide are silica particles.

3 . The heat insulating material according to claim 1 , wherein the reinforcing fiber is one or more selected from a glass fiber and an alumina fiber.

4 . The heat insulating material according to claim 1 , wherein the porous structural body is pulverized.

5 . The heat insulating material according to claim 1 , wherein the porous structural body has a chamfered shape.

6 . The heat insulating material according to claim 1 , wherein the porous structural body is a silica aerogel in which a plurality of the silica particles are connected to form the skeleton.

7 . The heat insulating material according to claim 1 , wherein a content of the porous structural body in the heat insulating layer is 50 parts by mass or more and 280 parts by mass or less with respect to 100 parts by mass of components excluding the porous structural body and the reinforcing fiber.

8 . The heat insulating material according to claim 1 , wherein a content of the reinforcing fiber in the heat insulating layer is 5 parts by mass or more and 200 parts by mass or less with respect to 100 parts by mass of components excluding the porous structural body and the reinforcing fiber.

9 . The heat insulating material according to claim 1 , wherein a diameter of the reinforcing fiber is 6.5 μm or more and 18 μm or less, and a length of the reinforcing fiber is 3 mm or more and 25 mm or less.

10 . The heat insulating material according to claim 1 , comprising the heat insulating layer and a first base material laminated on the heat insulating layer.

11 . The heat insulating material according to claim 10 , wherein the first base material is a glass cloth.

12 . The heat insulating material according to claim 10 , comprising the heat insulating layer, the first base material, and a second base material laminated on the opposite side of the first base material with the heat insulating layer sandwiched between the first base material and the second base material.

13 . The heat insulating material according to claim 12 , wherein the second base material is a glass cloth.

14 . The heat insulating material according to claim 12 , comprising a main body part in which the first base material and the second base material are laminated with the heat insulating layer sandwiched between the first base material and the second base material, and a peripheral edge part in which the first base material and the second base material overlap around the heat insulating layer.

15 . The heat insulating material according to claim 14 , wherein the first base material and the second base material are fused at the peripheral edge part.

16 . The heat insulating material according to claim 14 , wherein the first base material and the second base material are fixed by a fixing member, and the fixing member is arranged on the peripheral edge part.

17 . The heat insulating material according to claim 16 , wherein the fixing member has elasticity.

18 . A manufacturing method of the heat insulating material according to claim 10 , comprising:
a paint preparation step of preparing a paint for heat insulating layer which has the porous structural body, the reinforcing fiber, and a dispersion liquid in which the nanoparticles of the metal oxide are dispersed in a liquid; and an applying step of applying the paint for heat insulating layer to the first base material.

Assignees

• Sumitomo Riko Co Ltd

Inventors

• Kumagai Shinji
• Katayama Naoki
• Hayashi Shota
• Taguchi Yutaro

Classifications

• B32B2266/057

  Silicon-containing material, e.g. glass · CPC title

• B32B2264/1021

  Silica · CPC title

• B32B5/30

  one layer {being formed of particles, e.g. chips,} granules, powder · CPC title

• B32B5/18

  characterised by features of a layer {of} foamed material · CPC title

• F16L59/029 Primary

  layered · CPC title