A coextruded polypropylene air-bubble sheet,Bubble Guard Board,is made up of three film layers (A-B-A) and weighs from 200-3500 g/m~2.The inner layer forms a classic air-bubble film wherein the two external film layers provide a smooth surface which is printable and suitable for inline lamination.These hermetically seal the inner bubble layer.
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机译：一种共挤聚丙烯气泡片，气泡防护板，由三层膜（ABA）组成，重量为200-3500 g / m〜2。内层形成经典的气泡膜，其中两个外膜层提供可印刷的光滑表面，适用于在线层压。这些密封内部气泡层。
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