Gas permeable membranes

Details Gas permeable membranes Gas permeable membranes

2008-08-26

2011-11-15

Miggins, Michael C (Department: 1782)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S035200, C428S036900, C428S036910, C428S036100, C428S220000, C428S036500, C426S395000

Reexamination Certificate

active

08057872

ABSTRACT:
Disclosed is a multilayer structure comprising a layer of humidity-dependent composition having a ratio of wet cup permeance to dry cup permeance greater than 10 and a layer of crystallizable polymer sufficiently permeable to oxygen, carbon dioxide and water vapor, exhibiting an increase in permeability to at least one of oxygen and carbon dioxide by a factor of at least 2.5 over a temperature range of 10° C. between 0° C. and 40° C. Also disclosed are packaging materials comprising the multilayer structure and methods for storing respiring materials using the packaging materials.

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