Elastic film and method for producing an elastic layer material

US11479012B2 · kind B2 · utility

Assignee

• MONDI AG · AT

Inventors

• Henner Sollmann · Gronau, DE
• Peer Brolund · Gronau, DE
• Ralf SCHWERING · Steinfurt, DE

Key dates

• Filing date: Oct 16, 2019
• Grant date: Oct 25, 2022
• Expiry date: Dec 5, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2353/00
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

An elastic film has a perforation formed by perforation holes that are elongated along a preferred expanding direction in the unexpanded state, wherein the ratio of the length of the perforation holes determined along the preferred expanding direction to a width of the perforation holes determined perpendicular thereto amounts to at least 3:2. The elongation at break along the preferred expanding direction is at least twice as high as the elongation at break determined perpendicular thereto along the width of the perforation holes.