| 摘要 |
<p>The packing sack is for the transport and further handling of pot plants, cut flowers etc. It comprises a first wall (3) of translucent plastics sheet which can be heat-welded at relatively low temp. and of sufficient thickness to give the necessary strength. A second wall (4) of prepared micro-porous paper sheet (5), has a low degree of permeability to moisture and good permeability to air, and of thickness giving the necessary strength. Plastic (6) sheet, pref. of the same type as for the first wall is glued to the paper sheet, and is thin enough to be fully permeable to air and moisture. The first and second walls are welded together along a seam (7) formed by heating, between the two plastic sheets.</p> |
