Back to results
US 4,550,141 AGranted
Blends of ionomer with propylene copolymer
AssigneeE. I. Du Pont de Nemours and Company
InventorGeorge L. Hoh
Life of this patent
Estimating the term…
Abstract
Blends of (a) 80-93 weight percent of an ethylene/acid ionomer, and (b) 7-20 weight percent of a propylene/.alpha.-olefin copolymer are used to prepare peelable seals having nearly constant and predictable peel strength over an extended heat seal temperature range. Some of the seals so produced also show stress whitening.
Claims14
A molecular blend of polymeric materials for producing film characterized by a nearly constant peel strength over an extended heat seal temperature range, said materials comprising:
- (a) 80-93 weight percent of an ethylene/acid ionomer, and
- (b) 7-20 weight percent of a propylene/.alpha.-olefin copolymer, wherein the .alpha.-olefin comprises 1-12 weight percent of the copolymer.
Dependencies are inferred from the claim text.