Multilayered film

US6716501B2 · kind B2 · utility

Assignee

• Avery Dennison Corporation · US

Inventors

• John Kovalchuk · Painesville, US
• Bernard S. Mientus · Painesville, US

Key dates

• Filing date: Jul 18, 2002
• Grant date: Apr 6, 2004
• Expiry date: Aug 2, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31935
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

This invention relates to a multilayered film for use as in-mold label, comprising: a core layer having a first surface and a second surface, the core layer being comprised of a polymeric material and particulate solids dispersed in the polymeric material; and a first skin layer overlying the first surface of the core layer; the film being formed by co-extruding the core layer and first skin layer to form the multilayered film, hot-stretching the film at a temperature above the expected service temperature of the label to provide the film with a machine direction orientation, the density of the film being reduced by about 5% to about 25% during hot-stretching, and annealing the film at a temperature above the expected service temperature of the label; the film having a machine direction Gurley stiffness value in the range of about 30 to about 120, a machine direction shrinkage of less than about 2%, and a machine direction shrink tension at 200° F. (93.3° C.) of less than about 100 psi.