| 摘要 |
PURPOSE:To obtain the polyolefin resin form of a continuous bubbles having compression charactristic and rigidity which are equal to or higher than these properties of the foam having independent bubble by a method wherein mechanical deforming operation is applied on the closslinking foam having an independent bubble structure having the percentage of gel content within a specified range to convert the foam into the closslinking foam having a continuous bubble structure. CONSTITUTION:A molding sheet, obtained from polyolefin resin, is closslinked and foamed to obtain closslinking resin foam in which the percentage of gel content (Gs) of the surface layer thereof is equal to or larger than the percentage of gel content (Gm) of the central portion thereof and the percentages (Gs) and (Gm) are within the range of 10%-60% while the average diameter of the bubbles is within the range of 0.3-1.0mm; then, mechanical deforming operation is applied on the closslinking polyolefin series resin foam to make the bubbles in the foam continuous. This closslinking polyolefin resin foam, having the continuous bubbles, has the continuous bubble rate (T) of 30% or more, a compression index (P) of 0.1-10 and the toughness index (N) of 100-2,500. |
