| 摘要 |
<p>Themoplastic packing material can be stored in a very dense condition and is useful e.g. as a covering material which impedes dust formation. The material is most advantageous in foamed condition and features rows of spaced incisions. Every second row has incisions which are nearly in aligment but are offset from the incisions in the interposed rows. In its dense, stored form the material can be transported by hand and on being unwound expands; its converted open net-like structure runs across the incisions.</p> |
