US 11,655,931 B2
Heat insulating material and manufacturing method thereof
Shinji Kumagai, Aichi (JP); Naoki Katayama, Aichi (JP); Shota Hayashi, Aichi (JP); and Yutaro Taguchi, Aichi (JP)
Assigned to Sumitomo Riko Company Limited, Aichi (JP)
Filed by Sumitomo Riko Company Limited, Aichi (JP)
Filed on Jul. 9, 2021, as Appl. No. 17/371,132.
Application 17/371,132 is a continuation of application No. PCT/JP2021/003010, filed on Jan. 28, 2021.
Claims priority of application No. JP2020-043417 (JP), filed on Mar. 12, 2020.
Prior Publication US 2021/0332932 A1, Oct. 28, 2021
Int. Cl. F16L 59/02 (2006.01); B32B 5/26 (2006.01); B32B 17/02 (2006.01); B32B 5/18 (2006.01); B32B 5/30 (2006.01)
CPC F16L 59/029 (2013.01) [B32B 5/18 (2013.01); B32B 5/26 (2013.01); B32B 5/30 (2013.01); B32B 17/02 (2013.01); B32B 2250/40 (2013.01); B32B 2255/02 (2013.01); B32B 2255/20 (2013.01); B32B 2262/101 (2013.01); B32B 2264/1021 (2020.08); B32B 2266/057 (2016.11); B32B 2266/126 (2016.11); B32B 2307/304 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A heat insulating material, comprising:
a heat insulating layer, and
a first base material laminated on the heat insulating layer,
wherein the heat insulating layer comprising:
a porous structural body, wherein the porous structural body has a hydrophobic portion on at least one of exterior and interior surfaces of the porous structural body, and the porous structural body is a silica aerogel body in which a plurality of the silica aerogel particles are connected to each other to form a skeleton, and pores formed between the silica aerogel particles,
glass fibers, wherein the glass fibers are physically intertwined around the porous structural body,
a carboxyl methyl cellulose thickener, and
a silica particle binder, wherein the silica aerogel particles and the glass fibers are bonded via the silica particle binder,
wherein the heat insulating layer has a mass loss rate of 10% or less in thermogravimetric analysis held at 500° C. for 30 minutes,
the heat insulating layer is impregnated with a mesh near a contact surface between the heat insulating layer and the first base material, and
wherein the first base material is a cloth or a non-woven fabric manufactured from a glass fiber or a metal fiber.