| 摘要 |
<p>A moldable fibrous composite having thermal and acoustical insulating characteristics and methods of production thereof are provided. The composite structure comprises a substrate, a middle layer and a non-woven top layer. The substrate may be in the form of a fibrous web or, alternatively, a thermoplastic film. The middle layer comprises mineral fibers of a sufficiently short length to substantially preclude interlocking of any of the mineral fibers with other fibers of the structure and to provide the structure with desired flexibility. The mineral fibers are present in a quantity sufficient to impart desired heat and sound insulating properties to the structure. The top layer may be made of organic fibers or a substantially uniform mixture of organic and inorganic fibers. In making the inventive composite structure, the middle layer and the top layer are introduced onto the substrate, respectively. The three layers are thereafter consolidated, such as through needle punching. In addition, binders may be added to the composite structures so as to impart desired properties such as improved moldability.</p> |
