公开(公告)号：US20210018713A1

公开(公告)日：2021-01-21

申请号：US16957650

申请日：2018-12-21

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Timothy J. Hebrink ,  William B. Black ,  Stephen A. Johnson ,  Kenneth A. Meyer ,  Craig A. Miller ,  Derek W. Patzman

IPC: G02B7/00 ,  G02B5/22 ,  G02B5/26 ,  G02B5/20 ,  G02B1/10 ,  G02B5/08 ,  F28F13/18 ,  C09D127/18 ,  C09D127/20 ,  C09D127/16

Abstract: A passive cooling article is disposed on a substrate to cool the substrate. The article includes an outer layer having a high absorbance in the atmospheric window region of the electromagnetic spectrum and having a high transmittance in the solar region of the spectrum. The article also includes a reflector having a high reflectivity in the solar region of the spectrum. At least one of the outer layer and the reflector includes a fluoropolymer. Micro-sized particles or surface structures may be disposed in or on the outer layer or the reflector to improve absorbance. A metallic layer may be disposed between the fluoropolymer and the substrate to be cooled.