Method for producing an elastic, air-permeable laminate film

US7083691B2 · kind B2 · utility

Assignee

• Nordenia Deutschland Gronau GmbH · DE

Inventors

• Markus Hamulski · Gronau, DE
• Georg Baldauf · Laer, DE
• Marcus Schönbeck · Versmold, DE

Key dates

• Filing date: Jan 21, 2003
• Grant date: Aug 1, 2006
• Expiry date: Jul 22, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1097
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for the production of an elastic, air-permeable laminate film is disclosed, whereby material webs made of a fiber non-woven fabric are applied to both sides of an elastomer layer, and the multi-layered material subsequently runs through an ultrasound bonding station. The elastomer layer is melted to form point-shaped bonds at discrete locations by means of ultrasound, while maintaining the substance of the fiber non-woven fabric. An air-permeable structure is formed at the melted sites. According to the method, a melt film made of a thermoplastic elastomer is passed to a laminating unit and introduced, in the thermoplasticized state, between two material webs of fiber non-woven fabric that run into the laminating unit. The melted intermediate layer of the multi-layered material is cooled to solidification temperature, whereby a laminate with cover layers made of fiber non-woven fabric is produced. The laminate is subsequently passed to the ultrasound bonding station.