Nilit Ltd.

Nilet Ltd.

Boris Streltses

Alon Weiser

Alexander Yermolaev

Uri Afek

Samuel Gazit

Michael Eroshov

Ran Rotem

Juliana Katz

Thierry Mamodaly

Ariel Yedvab

Provided is a process for manufacturing a polyamide yarn exhibiting good dyeability, while utilizing polyamide waste. The recycled polyamide yarn with a high waste polymer content is used for making quality articles by a low cost method, which is further friendly to the preservation of the environment.

Process of making recycled polyamide yarn

Process for manufacturing a fabric having distinctive and sharp differentially colored patterns or designs, which process comprises the steps of: (a) producing a first and a second polyamide, said polyamides having different concentrations of amine groups; (b) producing a first and a second polyamides having different concentrations of carboxyl end-groups and sulfonate groups; (c) producing a first yarn from said first polyamide and a second yarn from said second polyamide; (d) making a fabric having first surface areas defined by said first yarn and second surface areas defined by said second yarn; and (e) chemically dyeing said fabric in a dyeing bath comprising at least one anionic (acid) dyestuff and at least one cationic (basic) dyestuff, whereby said first yarn and therefore said first surface areas are dyed predominantly by said anionic dyestuff and said second yarn and therefore said second surface areas are dyed predominantly by said cationic dyestuff.

Process for making polyamide textile articles bearing designs in different colors

Growing community of inventors

Migdal Haemek, Israel

Boris Streltses