US 12,246,518 B2
Additive free fabrication of polymeric composites with delayed and reduced dripping
Ehsan Behzadfar, Toronto (CA); Christopher W. Macosko, Minneapolis, MN (US); Frank S. Bates, Minneapolis, MN (US); Alex M. Jordan, Menomonie, WI (US); and Kyungtae Kim, Minneapolis, MN (US)
Assigned to Ehsan Behzadfar, Toronto (CA)
Filed by Ehsan Behzadfar, Toronto (CA)
Filed on Feb. 25, 2022, as Appl. No. 17/681,044.
Claims priority of provisional application 63/154,374, filed on Feb. 26, 2021.
Prior Publication US 2022/0274386 A1, Sep. 1, 2022
Int. Cl. B32B 27/08 (2006.01); B29C 48/21 (2019.01); B29C 48/30 (2019.01); B32B 27/32 (2006.01); B29K 23/00 (2006.01); B29L 9/00 (2006.01)
CPC B32B 27/08 (2013.01) [B29C 48/21 (2019.02); B29C 48/304 (2019.02); B32B 27/32 (2013.01); B29K 2023/06 (2013.01); B29K 2023/12 (2013.01); B29L 2009/00 (2013.01); B32B 2250/04 (2013.01); B32B 2250/05 (2013.01); B32B 2250/42 (2013.01); Y10T 428/24967 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A multilayer composite material comprising:
a plurality of first layers, each first layer comprising a first polymer; and
a plurality of second layers, each second layer comprising a second polymer, the plurality of first layers and the plurality of second layers being arranged in a repeating sequence of alternating first layers and second layers within the multilayer composite material;
wherein
the multilayer composite material has reduced dripping and a delayed first dripping time as the multilayer composite material undergoes a combustion process relative to a multilayer composite material having a single layer comprising the first polymer or the second polymer having a same thickness as a thickness of the multilayer composite material;
the first polymer is a low-density polyethylene-based polymer and the second polymer is a polypropylene-based polymer;
the repeating sequence of alternating first layers and second layers includes between 20 and 2560 uninterrupted alternating first layers and second layers; and
wherein the thickness of each layer of the multilayer composite material is in a range of about 10 nm to about 0.1 mm.
 
14. A multilayer composite material comprising:
a plurality of first layers, each first layer comprising a first polymer; and
a plurality of second layers, each second layer comprising a second polymer, the plurality of first layers and the plurality of second layers being arranged in a repeating sequence of alternating first layers and second layers within the multilayer composite material;
wherein
each first layer and each second layer within the repeating sequence has a thickness in a range of about 10 nm to about 3 mm;
the multilayer composite material has reduced dripping and a delayed first dripping time as the multilayer composite material undergoes a combustion process relative to a multilayer composite material having a single layer comprising the first polymer or the second polymer having a same thickness as a thickness of the multilayer composite material;
the first polymer is a low-density polyethylene-based polymer and the second polymer is a polypropylene-based polymer;
the repeating sequence of alternating first layers and second layers includes between 20 and 2560 uninterrupted alternating first layers and second layers; and
the first layer and the second layer have a different thickness.