Laminate and method of making same

US11383481B2 · kind B2 · utility

Assignees

• REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK · DE
• PFNONWOVENS HOLDING S.R.O · CZ

Inventors

• Sebastian Sommer · Troisdorf, DE
• Michael Maas · Schnorbach, DE
• Claudio Cinquemani · Cologne, DE
• Markus Jansen · Dressendorf, DE
• Nicolas Quick · Winterberg, DE

Key dates

• Filing date: Jan 9, 2017
• Grant date: Jul 12, 2022
• Expiry date: May 16, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2323/10
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A laminate is made by first making by melt-blowing or spunbonding of multicomponent, thermoplastic, and endless filaments a first nonwoven layer lying generally in a plane and having a predetermined shrinkage capacity or potential parallel to the plane and making of thermoplastic and endless filaments a second nonwoven layer also lying generally in a respective plane and having a shrinkage capacity or potential that is smaller than that of the first nonwoven layer. The two layers are directly juxtaposed flatly on each other, and the directly juxtaposed first and second layer are bonded together only at bonded regions while leaving an array of unbonded regions distributed over a surface of the two bonded-together nonwoven layers. Then only the first nonwoven layer is shrunk so that the second layer bunches in the unbonded regions and is there raised transverse to a plane of the bonded-together layers.