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Abstract

A process for the treatment of non-woven sheets made of synthetic textiles containing two constituents arranged side-by-side, one based on polyamide (polyhexamethyleneadipamide) and the other based on polyester (polyethylene glycol terephthalate), in which the following steps are carried out: (a) conversion to a sheet of the crimped textile having an overall linear density of less than 2 dtex, (b) optional needle bonding of the sheet, and (c) chemical treatment at low temperature in an aqueous solution of a swelling product for one of the constituents, permitting contraction and at least partial separation of the two constituents of the textile, the strands of which each then have a denier of less than 1 dtex. Swelling product: aqueous solution of formic acid at a concentration of 50% to 70%, preferably of between 55% and 65%, and at a temperature of between 5.degree. C. and 40.degree. C., preferably of between 18.degree. C. and 25.degree. C. The non-woven sheets obtained, having characteristics enabling them to be used in the majority of textile applications such as clothing, furnishing and the like.

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