| 摘要 |
PURPOSE:To increase internal loss for oscillation to absorb the oscillation immediately by using hard foamed polyurethane containing >=5wt% fibrous inorganic material as a cabinet material. CONSTITUTION:A cabinet is made of hard foamed polyurethane containing >=5wt% fibrous inorganic material. As the fibrous inorganic materials, glass fiber, metallic fiber, mineral fiber, selamic fiber, monocrystal fiber, etc. are used. The fiber with length <=5mm. and the ratio of length l to diameter (d) is 10-500 and preferably, the fiber with the length of 5mm. and less and l/d of 10-500 is used. |
