Elastic, liquid-impermeable but gas-permeable, composite non-woven, useful e.g. in personal hygiene articles, comprises polypropylene fiber material penetrated by elastic layer of propylene-ethylene copolymer

摘要

In an elastic composite non-woven (A) comprising a first layer (L1) of stretchable material of polypropylene fibers bonded to a second layer (L2) of elastic material, the elastic material is a propylene-ethylene copolymer, (L2) at least partially penetrates into (L1) and the elastic material of (L2) encloses part of the fibers of (L1). An independent claim is included for the production of (A), by applying the propylene-ethylene copolymer in molten form to the (L1), the viscosity and impinging speed of the melt being such that the elastic copolymer material at least partially permeates into (L1) and encloses part of the fibers of (L1).