Improved resilient, three dimensional polymeric film with slanted capillary apertures, and absorbent article, with backsheet comprising film

Abstract

The present invention relates to resilient, three dimensional, perforated plastic webs which allow passage of water vapour, and preferably of air, and are resistant to the transmission of aqueous fluids at least in one direction. According to the present invention the perforated plastic webs consist of a liquid impervious polymeric film having apertures. Theses apertures form capillaries which are not perpendicular to the plane of the film but are disposed at an angle of less than 90 DEG relative to the plane of the film. The capillaries also have a length L which has a preferred value as compared to the distance that separates a capillary from adjacent ones. The present invention also relates to absorbent articles like baby diapers, adult incontinence articles and in particular to sanitary napkins or pantiliners which have a topsheet on the surface facing the wearer in use. According to the present invention the articles are provided also with an apertured backsheet for breathability. The backsheet comprises at least one breathable layer of a resilient, three dimensional, perforated plastic web as described above.

Description

technical field [0001] The present invention relates to resilient, three-dimensional, apertured plastic meshes which are breathable but impede the passage of aqueous liquids in at least one direction. According to the present invention, the apertured plastic web comprises an apertured liquid-impermeable polymer film. These openings form capillaries which are not perpendicular to the plane of the membrane but are arranged at an angle of less than 90° relative to the plane of the membrane. The length of these capillaries is L, which has a preferred value compared to the distance separating the capillaries from each other. The present invention also relates to absorbent articles such as baby diapers, adult incontinence products, and in particular sanitary napkins or pads which are breathable and have an apertured backsheet of said web. Background technique [0002] The primary consumer demand which forms the cornerstone of the development in the field ...

AI Technical Summary

Problems solved by technology

At the same time, however, especially under severe service conditions that lead to higher pressures on the three-dimensional open-pored polymeric film, usually in a direction perpendicular to the plane of the film, it can be concluded that the bending of the inclined capillary will make it at the end of the capillary. The second opening of the portion is in direct contact with the surface of the three-dimensional polymeric film, which is located between the capillaries themselves, at which point a certain amount of liquid will accumulate during use of the film, for example when the resilient three-dimensional polymeric film is preferably combined in When in the breathable backsheet structure of a disposable absorbent article, these liquids come from the absorbent core

Images