Packaging material made of biaxially oriented polyolefin film

US6749933B2 · kind B2 · utility

Assignee

• Trespaphan GmbH · DE

Inventors

• Thomas Dries · Bad Kreuznach, DE
• Wolfgang Eiser · Blieskastel, DE

Key dates

• Filing date: Jun 19, 2002
• Grant date: Jun 15, 2004
• Expiry date: Jun 19, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31913
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a packaging material made of a multilayer oriented polyolefin film, which comprises a base layer and at least one first outer layer, whereby the first outer layer is placed in contact with itself or in contact with the opposing surface of the film or in contact with the surface of another film. This first outer layer contains an additive which absorbs light within the wavelength range of a laser such that when the film is locally irradiated by the laser, the area of irradiation experiences an increase in temperature that causes the polyolefin of the first outer layer to soften or melt in the irradiated area and to bond to another layer when cooled.