Packaging method

Details Packaging method Packaging method

B - Operations, Transporting

65

D

156/62

B65D 81/24 (2006.01)

Patent

CA 1339781

The invention provides methods of packaging plant materials. The plant materials are packaged in a perforate polymeric film, the film being of a polymer having a water vapour transmission rate and an oxygen transmission rate which improve the shelf lives of the packaged materials. The film is selected so that the water vapour transmission rate is substantially that inherent to the film, and the oxygen transmission rate is controlled by the size and/or frequency of perforations in the film. Typically the perforations will have a mean diameter of not more than 100 microns, and preferably from 40 to 60 microns. The frequency of perforations will usually be not more than 1000 per square metre, although at least 10 per square metre will usually be required.

603487

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