| 摘要 |
<p>PURPOSE:To simply and effectively hold freshness of vegetables and fruits in a state of MA (Modified Atmosphere) while cooling by hermetically sealing and packaging vegetables and fruits in a bag, in which fine holes are provided so as to bring close to CA (Controlled Atmosphere) conditions suitable for physiological action of vegetables and fruits and then, pre-cooling the packed bag in a vacuum. CONSTITUTION:Vegetables and fruits are hermetically packaged in a bag perforated so that total perforated area is 0.4-4mm<2>/kg based on the weight of vegetables and fruits packaged and a ratio of a hole diameter (preferably 0.2-1.5mm) to a film thickness (preferably 20-60mum) is 3-50 and then, the bag is pre-cooled in a vacuum. Furthermore, as a material of the film constituting the bag, a low-density polyethylene is preferably used from a viewpoint of cost and a stretched polypropylene is preferably used from a viewpoint of transparency. 0.2-2wt.% of nonionic surfactant such as sorbitan monostearate is preferably added to a resin constituting the innermost layer of the perforated bag so as to prevent the inside of the bag from attachment of water drops by transpiration action of vegetables and fruits.</p> |
