US 12,283,682 B2
Thermal blocking sheet
Ignatius De Wilde, Rotterdam (NL); and Jurgen Gebhard, Wuppertal (DE)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Jul. 6, 2021, as Appl. No. 17/368,406.
Claims priority of application No. 20184484 (EP), filed on Jul. 7, 2020; application No. 20184494 (EP), filed on Jul. 7, 2020; and application No. 21179805 (EP), filed on Jun. 16, 2021.
Prior Publication US 2022/0013825 A1, Jan. 13, 2022
Int. Cl. H01M 10/658 (2014.01); H01M 10/613 (2014.01); H01M 10/625 (2014.01); H01M 10/647 (2014.01); H01M 50/249 (2021.01); H01M 50/289 (2021.01)
CPC H01M 10/658 (2015.04) [H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 10/647 (2015.04); H01M 50/249 (2021.01); H01M 50/289 (2021.01); H01M 2220/20 (2013.01)] 14 Claims
 
1. A thermal blocking sheet for reducing the spread of fire or heat, the thermal blocking sheet comprising:
a first layer;
a second layer of expandable graphite;
a barrier layer between the first layer and the expandable graphite layer; and
a glass cloth containment layer on an opposite side of the second layer from the barrier layer;
wherein if the thermal blocking sheet is exposed to heat exceeding a threshold temperature the expandable graphite is configured to expand, wherein the first layer comprises a layer of foam configured to compress or melt if the thermal blocking sheet is exposed to heat exceeding the threshold temperature.
 
8. A thermal blocking sheet for reducing the spread of fire or heat, the thermal blocking sheet comprising:
a first layer;
a second layer of expandable graphite;
a barrier layer between the first layer and the expandable graphite layer; and
a containment layer on an opposite side of the second layer from the barrier layer;
wherein if the thermal blocking sheet is exposed to heat exceeding a threshold temperature the expandable graphite is configured to expand, wherein the first layer comprises a layer of foam configured to compress or melt if the thermal blocking sheet is exposed to heat exceeding the threshold temperature, and wherein the containment layer is a non-foaming layer.