Inventors:
Rochelle L. Lockridge - Maplewood MN
Dennis L. Krueger - Hudson WI
Philip G. Martin - White Bear Lake MN
Gary W. Schlaeger - Austin TX
Assignee:
Minnesota Mining and Manufacturing Company - St. Paul MN
International Classification:
B32B 330
Abstract:
An embossable sheet, having at least one stress-whitening layer comprising a blend of: a) at least one heat-stable polymer selected from the group consisting of polypropylene and a polymethyl alkene, said alkene having from about 3 to about 7 carbon atoms, b) at least one other polymeric material immiscible therewith, and c) an effective amount of an antioxidant, said sheet exhibiting stress-whitening which is stable at 136. degree. C. for at least about 7 days.