EXTRUDED MULTILAYER MATERIAL FOR ABSORBENT PRODUCTS Russian patent published in 2013 - IPC A61F13/15 

FIELD: medicine.

SUBSTANCE: invention refers to laminates applicable in absorbent products. The absorbent product comprises an upper layer, an external coating and an absorbent core in between. The external coating contains an extrusion bonded laminate (EBL). EBL comprises a multilayer co-extruded elastomeric film and a non-woven material. The film comprises a core layer, a binding layer and a surface layer with the surface layer arranged between the binding layer and the surface layer. The non-woven material consists of fibres and/or filaments made of polypropylene, polyethylene and their mixtures. The binding layer is in a non-adhesive connection with the non-woven material by extrusion coating. The binding layer has a composition identical to that of the surface layer and contains ethylene-propylene copolymer with the ethylene content 10-97 wt % The external coating is elastic to at least approximately 50% of unit elongation. The solubility difference of the non-woven material and the binding layer makes 0 to 1.49 MPa^1/2. The solubility difference of the binding layer and the core layer makes 2.5 MPa^1/2 or more. The multilayer co-extruded elastomeric film is characterised by a weight value per an area unit not exceeding approximately 40 g/sq.m.

EFFECT: elastomeric laminate according to the invention provides improved mechanical elongation properties ensured by mechanical activation without delamination with the use of no more than two extruders.

5 cl, 10 dwg, 8 ex