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    • 5. 发明申请
    • Sound absorptive foamed plastic and production method thereof
    • 吸声发泡塑料及其制造方法
    • US20030040547A1
    • 2003-02-27
    • US10196558
    • 2002-07-17
    • Yoshiaki WatanabeHiroyuki KuriharaTakanori YumotoShintaro Hara
    • C08J009/00C08J009/34
    • B32B3/26B32B5/18B32B5/245B32B11/048B32B2266/025B32B2307/10C08J9/38C08J2205/05Y10T428/249953Y10T428/249976Y10T428/249987
    • To provide a foamed plastic provided with holes having a specified area at a specified aperture ratio. The holes are either a through-hole or a non-through-hole and properly provided. The foamed plastic is superior in sound absorbing property and has a strength. In the case of non-through-holes, the foamed plastic can beep a sound absorbing effect as well as a sound intercepting effect, and for example, when used as a cushioning material of collision to be used as the lower portion of a dash panel of a motorear, not only the cushioning of collision but also the absorption of noises from an engine can be achieved. On the other hand, a foamed plastic obtained by pre-foaming foamable beads and again foaming the pre-foamed beads is a foamed plastic having gas permeability, which is different from usual foamed plastics. In this case, when an air current resistance value is set within a specified range, an audible sound of a human being can be most effectively absorbed. Thus, the latter foamed plastic can also be used as a cushioning material of collision and the like similar to the former foamed plastic.
    • 提供具有规定面积的规定孔径比的孔的泡沫塑料。 孔是通孔或非通孔,并且适当地提供。 发泡塑料的吸声性能优越,具有强度。 在非通孔的情况下,发泡塑料可以发出吸音效果以及截断声音效果,例如当用作碰撞的缓冲材料以用作仪表板的下部时 不仅可以实现碰撞的缓冲,还可以实现来自发动机的噪声的吸收。 另一方面,通过将发泡珠预发泡并再次使预发泡颗粒发泡得到的泡沫塑料是具有透气性的泡沫塑料,其与通常的发泡塑料不同。 在这种情况下,当将气流阻力值设定在指定范围内时,可以最有效地吸收人的可听见的声音。 因此,后者的发泡塑料也可以用作与之前的泡沫塑料类似的碰撞缓冲材料等。