Stock material or miscellaneous articles – Pile or nap type surface or component
Patent
1977-06-08
1979-11-13
Wityshyn, Michael G.
Stock material or miscellaneous articles
Pile or nap type surface or component
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
Fujita Keikichi
Ito Hajime
Sasaki Toshimitsu
Toyo Cloth Co. Ltd.
Wityshyn Michael G.
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