초록 ▼

A package that provides for the control of the atmosphere wherein its hermetically sealed walls, allowing fresh meat and poultry products to be held first in an atmosphere that retards the growth of bacteria until it is placed for sale in a retail display case. The package provides a dual layer lidd

A package that provides for the control of the atmosphere wherein its hermetically sealed walls, allowing fresh meat and poultry products to be held first in an atmosphere that retards the growth of bacteria until it is placed for sale in a retail display case. The package provides a dual layer lidding film with the inner layer being oxygen permeable and the outer layer being oxygen impermeable. At the time of display, the outer layer is removed so that oxygen can enter the package to activate the myoglobin in the meat to cause the meat to bloom to its usual red color. The lidding in part is formed by facing layers of easy peel polyethylene, LDPE treated with polybutylene.

대표청구항 ▼

[ We claim as my invention:] [1.] A film for packaging, comprising:a first low density polyethylene layer being substantially oxygen permeable, the first low density polyethylene layer being heat seal bonded to said packaging;a second low density polyethylene layer overlying said first low density p

[ We claim as my invention:] [1.] A film for packaging, comprising:a first low density polyethylene layer being substantially oxygen permeable, the first low density polyethylene layer being heat seal bonded to said packaging;a second low density polyethylene layer overlying said first low density polyethylene layer, said first and second low density polyethylene layers having a controlled reduced post heat seal bonding therebetween forming a peelable heat seal between the first low density polyethylene layer and the second low density polyethylene layer, said peelable heat seal having a bond strength less than the heat seal bonding of said first low density polyethylene layer to said packaging; anda barrier film layer overlying and adhered to said second low density polyethylene layer on a side of said second low density polyethylene layer opposite said first low density polyethylene layer and being substantially impermeable to oxygen.