发明授权
US4046622A Multi-ply fibrous sheets having a wet-laid ply and a dry-laid ply 失效
多层纤维片材具有湿敷层和干铺层

Multi-ply fibrous sheets having a wet-laid ply and a dry-laid ply
摘要:
A process and apparatus for forming a multi-ply sheet of cellulosic fibrous material. A dry-laid mat and a wet-laid web of cellulosic fibers are joined together and concurrently the dry-laid mat is consolidated by the concurrent application of heat, pressure and moisture, the moisture being derived from the wet-laid web.
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