US 12,492,777 B2
Thermal insulation pipe
Rudder Wu, Tsukuba (JP); Kuan-I Lee, Tsukuba (JP); Kazuhiro Matsuzaki, Kitakyushu (JP); Hironobu Sasayama, Kitakyushu (JP); Yukihisa Matsuo, Kitakyushu (JP); and Shogo Yamashita, Kitakyushu (JP)
Assigned to NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba (JP); and KROSAKIHARIMA CORPORATION, Kitakyushu (JP)
Appl. No. 18/028,539
Filed by NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba (JP); and KROSAKIHARIMA CORPORATION, Kitakyushu (JP)
PCT Filed Sep. 21, 2021, PCT No. PCT/JP2021/034448
§ 371(c)(1), (2) Date Mar. 25, 2023,
PCT Pub. No. WO2022/107437, PCT Pub. Date May 27, 2022.
Claims priority of application No. 2020-193779 (JP), filed on Nov. 20, 2020.
Prior Publication US 2023/0358357 A1, Nov. 9, 2023
Int. Cl. F16L 59/02 (2006.01); F16L 9/18 (2006.01); F16L 59/06 (2006.01); F16L 59/12 (2006.01); F16L 59/14 (2006.01)
CPC F16L 59/028 (2013.01) [F16L 9/18 (2013.01); F16L 59/12 (2013.01); F16L 59/06 (2013.01); F16L 59/14 (2013.01); F16L 59/143 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A thermal insulation pipe comprising:
an inner pipe, an outer pipe, a space between the inner pipe and the outer pipe, and a thermal-insulating material filled in the space,
wherein the thermal-insulating material is a weakly bonded ultrafine aerogel powder that is made from crushed aerogel having a three-dimensional network structure with a framework constituted by a cluster that is an aggregation of primary particles such that the weakly bonded ultrafine aerogel powder comprises fine particles having a three-dimensional network structure with a framework of the primary particles, and
wherein 50% or more of a total number of the fine particles are dispersed with a mode value of the particle size of 0.1 μm or more and 1.0 μm or less.