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11. 发明授权

US4515656A Low density nonwoven sheets 失效
标题翻译：低密度非织造片材
公开(公告)号：US4515656A
公开(公告)日：1985-05-07
申请号：US406543
申请日：1982-08-09
申请人： Wesley Memeger, Jr.
发明人： Wesley Memeger, Jr.
IPC分类号： D21F11/00
CPC分类号： D21F11/006 , D21H13/00 , D21H5/12 , Y10T428/234 , Y10T428/24091 , Y10T428/24479 , Y10T428/24612 , Y10T428/24661 , Y10T442/60
摘要： Coherent expanded nonwoven sheets having a density of less than 0.16 g/mL are comprised of fibrids of a wholly synthetic polymer, preferably not melting below 130.degree. C., and optionally containing up to 80% by weight floc. The sheet is comprised of a plurality of paper-like membranous layers which join and separate at random throughout the thickness of the sheet to form expanded cells. The expanded nonwoven sheets are prepared by rapid vaporization of water in a wet, never-dried sheet of fibrids containing at least 60% by weight water. Rapid vaporization of the water preferably is induced by dielectric heating. Embossing may be used before or during expansion to produce a sheet which is expanded only in selected areas.
摘要翻译：具有小于0.16g / mL密度的相干膨胀非织造片材由全合成聚合物的纤条体组成，优选不熔化低于130℃，任选地含有至多80重量％的絮状物。片材由多个纸状膜层组成，其在纸张的整个厚度上随机地连接并分离以形成膨胀的细胞。膨胀的非织造片材通过在含有至少60重量％水的湿的未干燥的纤维质片中快速蒸发水来制备。优选通过介电加热来诱导水的快速蒸发。可以在膨胀之前或期间使用压花来生产仅在选定区域扩展的片材。

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