US 11,655,933 B2
Method for improved insulation and filler materials
Ashish Nigam, St. Joseph, MI (US); and Devidas B. Raskar, St. Joseph, MI (US)
Assigned to Whirlpool Corporation, Benton Harbor, MI (US)
Filed by WHIRLPOOL CORPORATION, Benton Harbor, MI (US)
Filed on Dec. 14, 2021, as Appl. No. 17/550,351.
Application 17/550,351 is a division of application No. 16/758,605, granted, now 11,280,441, previously published as PCT/US2017/067021, filed on Dec. 18, 2017.
Prior Publication US 2022/0099238 A1, Mar. 31, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F16L 59/065 (2006.01); F25D 23/06 (2006.01)
CPC F16L 59/065 (2013.01) [F25D 23/063 (2013.01); F25D 23/066 (2013.01); F25D 2201/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for preparing a vacuum insulated panel comprising:
forming an internal cavity between a liner and a wrapper; and
preparing filler material to be disposed in the internal cavity, wherein the filler material comprises a first part and a second part, and preparing the filler material comprises:
coating a surface of the first part with a chemical comprising a first charge, wherein the coating forms a first surface charge on the surface of the first part; and
mixing the first part with the second part forming the filler material, wherein the second part comprises a material having a second surface charge opposite the first surface charge.