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    • 7. 发明授权
    • Fibrous acoustical material for reducing noise transmission and method
for producing the same
    • 用于减少噪声传播的纤维声学材料及其制造方法
    • US6165921A
    • 2000-12-26
    • US33932
    • 1998-03-02
    • Makio NagataKatsumi MorohoshiHiroki NagayamaKouichi Nemoto
    • Makio NagataKatsumi MorohoshiHiroki NagayamaKouichi Nemoto
    • B60R13/08B32B5/02D04H1/42D04H1/44D04H1/54D04H1/541G10K11/16G10K11/162D04H1/00D02G3/00
    • D04H1/44D04H1/42D04H1/54G10K11/162Y10T428/2929Y10T442/637Y10T442/692Y10T442/697
    • The invention relates to a fibrous acoustical material for reducing noise transmission. This fibrous acoustical material comprises first, second and third fibers. The first fiber has a first fineness of 1.5-20 deniers and a first softening point. The second fiber has a second fineness of 1.5-15 deniers. At least a surface of the second fiber has a second softening point which is at least 30.degree. C. lower than the first softening point. The third fiber has a third fineness of 1.5-15 deniers. At least a surface of the third fiber has a third softening point which is lower than the second softening point and at least 80.degree. C. lower than the first softening point. The first, second and third fibers are respectively in amounts of 10-90 wt %, 5-85 wt % and 5-85 wt %, based on a total weight of the first, second and third fibers. The first, second and third fibers are each within a range of from 20 to 100 mm in average fiber length. The fibrous acoustical material has an average apparent density of from 0.01 to 0.8 g/cm.sup.3. The fibrous acoustical material is light in weight and superior in acoustical capability, heat resistance and resistance to compressive force.
    • 本发明涉及一种用于减少噪音传播的纤维材料。 这种纤维性声学材料包括第一,第二和第三纤维。 第一纤维的第一细度为1.5-20旦尼尔和第一软化点。 第二纤维的第二纤度为1.5-15旦尼尔。 至少第二纤维的表面具有比第一软化点低至少30℃的第二软化点。 第三纤维的第三纤度为1.5-15旦。 至少第三纤维的表面具有比第二软化点低的第三软化点,并且比第一软化点低至少80℃。 基于第一,第二和第三纤维的总重量,第一,第二和第三纤维的量分别为10-90重量%,5-85重量%和5-85重量%。 第一,第二和第三纤维的平均纤维长度各自在20-100mm的范围内。 纤维状声学材料的平均表观密度为0.01〜0.8g / cm 3。 纤维性声学材料重量轻,声学性能,耐热性和抗压缩性优异。