Food or edible material: processes – compositions – and products – Packaged or wrapped product
Reexamination Certificate
2003-04-16
2008-10-21
Kruer, Kevin R. (Department: 1794)
Food or edible material: processes, compositions, and products
Packaged or wrapped product
C428S520000, C428S522000
Reexamination Certificate
active
07438940
ABSTRACT:
A breathable film involving at least one polymeric layer of 100% neutralized ionomer containing sufficient aliphatic, mono-functional organic acid salt to essentially triple the oxygen transmission value (OTV) and/or at least one polymeric layer of metallocene polyethylene (mPE) optional blended with low density polyethylene and preferably in combination with one or more outer layers of highly neutralized ionomer (e.g., Surlyn®). Such polymeric film and polymeric film structure has sufficient oxygen permeability, water vapor transmission, formability, and structural strength to be useful in wrapping food products requiring breathable films such as case ready meat, fish, sausage, fresh produce, and the like.
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PCT International Search Report for International application No. PCT/US 03/11877, dated Aug. 28, 2003.
Libert Timothy A.
Morris Barry Alan
Uradnisheck Julius
E. I. du Pont de Nemours and Company
Kruer Kevin R.
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