Heat-sealable, opaque, biaxially oriented, multilayer polypropylene film, process for the production thereof, and the use thereof

US5498474A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Detlef E. Schuhmann · Friedrichsthal, DE
• Thomas Dries · Bad Kreuznach, DE
• Adolf Wilhelm · Wiesbaden, DE
• Dieter Scheidecker · Eltville am Rhein, DE
• Harald Lohmann · Neunkirchen, DE

Key dates

• Filing date: May 6, 1994
• Grant date: Mar 12, 1996
• Expiry date: May 6, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31913
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The invention relates to a multilayer polypropylene film which comprises a base layer K, an interlayer Z and an outer layer D in the structure KZD. The base layer includes propylene polymer or a propylene polymer mixture and filler. The interlayer includes a propylene polymer or a propylene polymer mixture and pigment. The outer layer is heat-sealable and contains a combination of inorganic and/or organic particles and a tertiary aliphatic amine of the formula I: ##STR1## in which R.sup.1 is essentially an alkyl radical having at least 18 carbon atoms or an essentially fully saturated alkyl radical having 8 to 26 carbon atoms, and PA1 R.sup.2 and R.sup.3 are identical or different and are R.sup.4 -CH.sub.2 OH, in which R.sup.4 is an essentially saturated C.sub.1 -C.sub.6 -alkyl radical.