US 12,247,349 B2
Method of producing a support for polyurethane-based imitation leather free of dimethylformamide (DMFa) or other solvents or water, and related method of producing an imitation leather
Virginio Abbondio Fidanza, Brescia (IT); and Emanuele Ventura, Brescia (IT)
Assigned to CONDOR TRADE S.R.L., Brescia (IT)
Appl. No. 17/800,972
Filed by CONDOR TRADE S.R.L., Brescia (IT)
PCT Filed Feb. 11, 2021, PCT No. PCT/IB2021/051115
§ 371(c)(1), (2) Date Aug. 19, 2022,
PCT Pub. No. WO2021/165794, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 102020000003401 (IT), filed on Feb. 19, 2020.
Prior Publication US 2023/0064200 A1, Mar. 2, 2023
Int. Cl. D06N 3/14 (2006.01); D06N 3/00 (2006.01)
CPC D06N 3/147 (2013.01) [D06N 3/0006 (2013.01); D06N 3/0011 (2013.01); D06N 3/0077 (2013.01); D06N 3/0097 (2013.01); D06N 2203/068 (2013.01); D06N 2205/16 (2013.01); D06N 2213/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing a support for polyurethane-based imitation leather free of dimethylformamide (DMFa) or other solvents or water, comprising:
preparing a base having a width;
spraying a two-component polyurethane layer on the base, the step of spraying a two-component polyurethane layer on the base comprising: preparing a first component and a second component of the two-component polyurethane layer; combining the first and second components to obtain a mixture; and spraying the mixture uniformly on the base forming the two-component polyurethane layer without a further step of leveling using a blade;
applying a backing on the two-component polyurethane layer forming a support; and
drying the support;
wherein spraying the mixture uniformly on the base comprises translating a spray system along a width of the base while said base runs at a constant speed beneath the spray system.