Plastic and nonmetallic article shaping or treating: processes – With twining – plying – braiding – or textile fabric formation
Reexamination Certificate
2006-04-11
2006-04-11
Tentoni, Leo B. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With twining, plying, braiding, or textile fabric formation
C028S104000, C028S107000, C264S172130, C264S211160
Reexamination Certificate
active
07025915
ABSTRACT:
A method for producing an artificial leather includes mixed spinning an island polymer and a sea polymer having a different dissolving property from that of the island polymer at a predetermined temperature, producing a non-woven substrate from the fiber obtained, immersing the non-woven substrate into a polymer, dissolving and removing the sea polymer in the non-woven substrate to obtain an artificial leather as a semi-finished product, and polishing the surface of the artificial leather to obtain an artificial leather having excellent dyeability and advanced fluff-like property. The ratio of melt flow index of the sea polymer to relative viscosity of the island polymer is about 20 to about 55, in which the relative viscosity of the island polymer is about 2.7 to about 3.5 and the weight percentage of the sea polymer relative to the sum of the sea polymer and the island polymer is about 30% to about 70%.
REFERENCES:
patent: 6517938 (2003-02-01), Andoh et al.
patent: 6528139 (2003-03-01), Hoyt et al.
Cheng Kuo-Kuang
Feng Chung-Chin
Lin Chin-Yi
Lin Mong-Ching
Wang Ching-Tang
Kamrath Alan D.
Nikolai & Mersereau , P.A.
San Fang Chemical Industry Co. Ltd.
Tentoni Leo B.
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