Production of synthetic suede leather

Stock material or miscellaneous articles – Pile or nap type surface or component

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156 77, 156254, 156331, 428 91, 428286, 428425, 428904, B32B 518, B32B 2740, B32B 3118

Patent

active

041744144

ABSTRACT:
Synthetic suede leather is produced by casting a mixture containing polyurethane elastomer and a solvent therefor between two sheets of a substrate fabric, immersing the resulting structure in a liquid which is a nonsolvent for polyurethane elastomer but miscible with said solvent, splitting said structure into two sheets at middle of the cast layer before it is fully gelled, and re-immersing the resultant sheets in said nonsolvent to allow complete gelation of said mixture.

REFERENCES:
patent: 2351498 (1944-06-01), Fowler
patent: 3540916 (1970-11-01), Fukuda et al.
patent: 3567535 (1971-03-01), Noda et al.
patent: 3616023 (1971-10-01), Fukushima et al.
patent: 3714307 (1973-01-01), Shikada
patent: 3912840 (1975-10-01), Edberg
patent: 3922402 (1975-11-01), Shimamura et al.
patent: 3958057 (1976-05-01), Nishimura et al.
patent: 4072773 (1978-02-01), Fukushima

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