| 摘要 |
PURPOSE: A non-woven fabric is attached to one side of a composite resin package to maintain a transparency and mechanical property of the package. CONSTITUTION: A porous packing material is composed of a multilayer film structure layered with a first resin layer(11), a second resin layer(12), a printing layer(13), and a third resin layer(14). A non-woven fabric of a tape shape is attached to the inside of the first resin layer forming an envelop shape. The first resin layer is formed of a polyethylen resin. The first resin layer has a thickness of 50-80 micrometer.
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