Patent · US Active

Biaxially oriented polypropylene film

US8378047B2 · kind B2 · utility

0Cited by

13References

13Claims

0Family size

Assignee

Borealis Technology Oy · FI

Inventors

Manfred Stadlbauer · Linz, AT
Eberhard Ernst · Linz, AT
Petri Lehmus · Porvoo, FI
Yvo Daniels · Zonhoven, BE
Franck Jacobs · Evergem, BE

Key dates

Filing date	Jan 9, 2009
Grant date	Feb 19, 2013
Priority date	—
Expiry date	Jan 9, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2323/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present technology relates to a biaxially oriented polypropylene film. The biaxially oriented polypropylene film comprises a polypropylene material having xylene solubles of at least 0.5 percent by weight. The polypropylene also has a strain hardening index of at least 0.15 measured at a deformation rate dε/dt of 1.00 s−1 at a temperature of 180° C. In certain embodiments, the strain hardening index is defined as the slope of a logarithm to the basis 10 of a tensile stress growth function as a function of a logarithm to the basis 10 of a Hencky strain for the range of Hencky strains between 1 and 3.

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