METHOD OF PRODUCING ELASTIC LAMINAR MATERIAL AND LAMINATED ELASTIC PRODUCT Russian patent published in 2020 - IPC B32B27/12 A61F13/514 

Abstract RU 2721012 C2

FIELD: manufacturing technology; hygiene.

SUBSTANCE: invention relates to laminar materials, containing elastic films, connected with non-woven materials, for use in sanitary-hygienic products and a method of producing elastic laminar material and a laminated elastic product. Method includes the following stages, carried out on one production process line: co-extrusion of first web of elastic film, comprising at least three layers, containing at least two different polymer materials, simultaneous supply of coextruded webs of first elastic film and two second webs of non-woven materials to heat-bonding calendar, wherein first elastic film web is located between two second webs of non-woven materials when fed into calendar; wherein the first elastic film web during movement from the co-extrusion step to the thermal bonding step changes from the molten state at the co-extrusion step to the hardened and cooled state upon entering the calendar, connection as a result of spot welding in calender of second webs of non-woven materials with corresponding opposite outer layers of intermediate web, mechanical stretching of intermediate web in accordance with direction transverse to same web.

EFFECT: invention provides for production of elastic laminar material intended for sanitary-hygienic products characterized by high elasticity, high ultimate tensile strength and increased softness compared to known products.

18 cl, 3 dwg, 1 tbl

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RU 2 721 012 C2

Authors

Andzheli, Petro

Kajra, Antonio

Di Benedetto, Karmine

Fornoni, Dzhanluidzhi

Dates

2020-05-15Published

2016-08-30Filed