发明名称 |
Gradient density padding material and method of making same |
摘要 |
A gradient density padding material includes a single layer of nonwoven material having at least one surface processed to form a portion of a thickness thereof having a density increased with respect to a remaining portion of the thickness thereof. The single layer of nonwoven material after processing has an airflow resistance within the range of 200-4000 MKS Rayls, wherein said single layer of nonwoven material has an enhanced acoustic performance. A method of making a gradient density padding material having an enhanced acoustic performance includes the steps of providing a single layer of nonwoven material and processing at least one surface of the single layer of nonwoven material to form a portion of a thickness thereof having a density increased with respect to a remaining portion of the thickness thereof. The single layer of nonwoven material after processing has an airflow resistance within the range of 200-4000 MKS Rayls. |
申请公布号 |
AU2003231005(B2) |
申请公布日期 |
2006.09.21 |
申请号 |
AU20030231005 |
申请日期 |
2003.04.22 |
申请人 |
LYDALL, INC. |
发明人 |
STEVEN BORCHARDT;DURWARD GOMEZ |
分类号 |
E04B1/82;E04B1/86;B32B5/02;B60R13/08;D04H1/54;D04H1/70;D04H1/74;G10K11/162;G10K11/168 |
主分类号 |
E04B1/82 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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