| 摘要 |
<p>PURPOSE:To obtain the high-strength bag having such an air permeability as not to check respiration of vegetables and fruits, maintaining freshness of vegetables and fruits by forming the bag from a multi-layer film consisting of a base layer film having a specific number of open holes and a resin layer having specific oxygen permeability and no holes. CONSTITUTION:A resin composed of a low-density polyethylene, ethylene-vinyl acetate copolymer, polymethylpentene, polybutadiene, etc., having 10,000cc/ m<2>.day.atm or more of oxigen permeability is extruded in a molten state and laminated to a base film 1 comprising a drawn polypropylene, drawn nylon, drawn polyethylene terephthalate or a complex film of these substances, having one or more open hole parts 3 in one bag and a resin layer 2 having no holes is formed to give a multi-layer film. The film is made into a bag to give the bag for retaining freshness of vegetables and fruits having such an air permeability as not to check respiration of vegetables and fruits and retaining effects on freshness of vegetables and fruits.</p> |
