Patent · US Expired

Monoaxially elastic laminate film

US7449240B2 · kind B2 · utility

6Cited by

9References

3Claims

0Family size

Assignee

Nordenia Deutschland Gronau GmbH · DE

Inventors

Markus Hamulski · Gronau, DE
Andreas Hagemann · Gronau, DE
Matthias PERICK · Ahaus, DE

Key dates

Filing date	Nov 27, 2002
Grant date	Nov 11, 2008
Priority date	—
Expiry date	Jun 5, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31938
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A monoaxially elastic laminate film is provided with a core layer made of a thermoplastic elastomer and at least one skin layer co-extruded together with the core layer. The skin layer is made of a thermoplastic plastic with a molecular lattice that becomes brittle when it solidifies, so that the plastic stretches only slightly when a stretching force is applied, and breaks without any transition when a pre-determined tear force has been exceeded. After becoming brittle, the molecular lattice is irreversibly broken up by monoaxial stretching in the stretching direction, but is maintained perpendicular to the stretching direction, and thereby reinforces the film in the crosswise direction.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.