发明名称 |
WET SPINNING SUBSTRATE WITH HIGH SOUND ABSORPTION |
摘要 |
FIELD: chemistry.SUBSTANCE: invention primarily relates to sound absorbing and/or sound insulating structural materials. The method of making a wet spinning substrate with high sound absorption involves the following steps: dispersing extruded fibres in an aqueous suspension with suspension consistency of up to 3.5 wt %; mixing said aqueous suspension until a homogeneous aqueous mixture is obtained; distributing said homogeneous aqueous mixture on a screen conveyor; dehydrating the homogeneous aqueous suspension to obtain a wet mat; drying the wet mat to obtain a sound-absorbing substrate. A fibre-based sound-absorbing intermediate product contains a composition which contains extruded fibres and water, the composition being characterised by dispersion consistency of up to 3.5 wt %. The fibre-based sound-absorbing substrate contains a mixture of extruded fibres and spun fibres, wherein the ratio of the number of extruded fibres to the number of spun fibres is about 0.13:1; and binder in which there are no formaldehyde-releasing reactive resins; the substrate is characterised by NRC of at least 0.80.EFFECT: improved sound absorption.20 cl, 3 tbl, 10 dwg |
申请公布号 |
RU2482084(C2) |
申请公布日期 |
2013.05.20 |
申请号 |
RU20100111750 |
申请日期 |
2008.08.29 |
申请人 |
ARMSTRONG UORLD INDASTRIZ, INK. |
发明人 |
VAJKER EHNTONI L.;GARMEHN ROBERT S. |
分类号 |
C04B26/02;C04B14/38;C04B16/08;E04B1/84 |
主分类号 |
C04B26/02 |
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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