US 11,938,703 B2
Multi-layered films for use in airbags and footwear
Diya Bandyopadhyay, Portland, OR (US); Narayanan Ashwin Kumar Bharadwaj, Hillsboro, OR (US); Yihua Chang, Portland, OR (US); Christopher J. Dimitriou, Portland, OR (US); Nancy D. Eisenmenger, Portland, OR (US); Sharon Oba, Beaverton, OR (US); and Richard L. Watkins, Portland, OR (US)
Assigned to NIKE, INC., Beaverton, OR (US)
Filed by NIKE, Inc., Beaverton, OR (US)
Filed on Jul. 27, 2022, as Appl. No. 17/815,225.
Claims priority of provisional application 63/203,609, filed on Jul. 27, 2021.
Prior Publication US 2023/0042037 A1, Feb. 9, 2023
Int. Cl. B32B 27/08 (2006.01); B29C 48/21 (2019.01); B29K 23/00 (2006.01); B29K 75/00 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B32B 27/38 (2006.01); B32B 27/40 (2006.01)
CPC B32B 27/08 (2013.01) [B29C 48/21 (2019.02); B32B 27/302 (2013.01); B32B 27/304 (2013.01); B32B 27/306 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 27/38 (2013.01); B32B 27/40 (2013.01); B29K 2023/086 (2013.01); B29K 2075/00 (2013.01); B29K 2995/0067 (2013.01); B32B 2250/05 (2013.01); B32B 2250/24 (2013.01); B32B 2270/00 (2013.01); B32B 2307/30 (2013.01); B32B 2307/7242 (2013.01); B32B 2325/00 (2013.01); B32B 2327/06 (2013.01); B32B 2329/04 (2013.01); B32B 2333/08 (2013.01); B32B 2363/00 (2013.01); B32B 2375/00 (2013.01); B32B 2377/00 (2013.01); B32B 2437/02 (2013.01); B32B 2605/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for producing a multi-layered film, the method comprising:
co-extruding a gas-barrier material and elastomeric material to form a multi-layered film having a core region that comprises:
at least 20 gas-barrier layers each comprising the gas-barrier material and each having an average thickness in a range of from about from about 0.01 micrometers to about 0.75 micrometers; and
a plurality of elastomeric layers alternating with the at least 20 gas-barrier layers, wherein each of the plurality of elastomeric layers comprises the elastomeric material and each has an average thickness ranging from about 2 micrometers to about 8 micrometers;
wherein the core region has a gas transmission rate of from about 0.3 to about 1.9 cubic centimeters per square meter per day for nitrogen measured at 23 degrees Celsius and 0 percent relative humidity for a structure having a thickness of from about 72 micrometers to about 320 micrometers; and
wherein the multi-layered film does not exhibit crazing or cracking after at least 350,000 KIM cycles.