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11. 发明授权

US4500594A Process for preparing multilayer fibrous structures and product 失效
标题翻译：制备多层纤维结构和产品的方法
公开(公告)号：US4500594A
公开(公告)日：1985-02-19
申请号：US588775
申请日：1984-03-12
申请人： Lino Credali , Emilio Martini , Domenico Lori
发明人： Lino Credali , Emilio Martini , Domenico Lori
IPC分类号： B32B5/26 , B29C63/00 , B32B7/04 , B32B29/02 , B32B37/00 , D21H11/04 , D21H13/14 , D21H27/36 , D21H27/38 , D21H1/02 , B32B21/06 , B32B23/06
CPC分类号： D21H27/38 , B32B29/02 , D21H11/04 , D21H13/14 , D21H27/36 , Y10T428/31902 , Y10T428/31978 , Y10T442/659 , Y10T442/668
摘要： Composite sheets comprising a layer of cellulosic fibers and a layer adjacent thereto consisting in whole or in part of thermoplastic fibers are made to adhere by superimposing the sheets on the side of the cellulosic fibers layer and by inserting between such layers a film of a thermoplastic polymer having:(a) a melting temperature lower than the melting temperature of the polymer forming the thermoplastic synthetic fibres contained in the layer adjacent to the cellulosic layer, intended for the adhesion, of the composite sheet;(b) a viscosity in the molten state--measured in a capillary viscosimeter, at a velocity gradient equal to or lower than 10.sup.-1 seconds, and at a temperature comprised between a temperature higher by 10.degree. C. than the melting temperature of such polymer and a temperature higher by 20.degree. C. than the melting temperature of the abovesaid thermoplastic fibres--lower than 1.multidot.10.sup.8 poises, and preferably lower than 1.multidot.10.sup.5 poises;(c) a surface tension not exceeding by more than 5 dynes/cm the surface tension of the polymer forming such thermoplastic fibres, measured at the same temperature;(d) a solubility parameter, at a temperature of 25.degree. C., in a ratio of from 0.8 to 1.15, extremes included, to the solubility parameter of the polymer forming such thermoplastic fibres; andby heating the whole at a temperature ranging from a temperature exceeding by 10.degree. C. the melting temperature of the polymer forming such film to a temperature exceeding by 20.degree. C. the melting temperature of the polymer forming the synthetic fibres existing in the layer which is adjacent to the cellulosic fibre layer, intended for the adhesion, of the composite sheet.
摘要翻译：通过将纤维素纤维层的一层和纤维素纤维全部或部分组成的复合片材叠合在纤维素纤维层的侧面上，并通过在这些层之间插入热塑性聚合物膜具有：（a）低于形成所述复合片材的附着层的与纤维素层相邻的层中所含的热塑性合成纤维的聚合物的熔融温度的熔融温度; （b）熔融状态下的粘度 - 在毛细管粘度计中以等于或低于10-1秒的速度梯度测量，并且在比其温度高10℃的温度下聚合物，比上述热塑性纤维的熔融温度高20℃，低于1×10 8泊，优选低于1×10 5泊; （c）在相同温度下测量的形成这种热塑性纤维的聚合物的表面张力不超过5达因/厘米的表面张力; （d）溶解度参数，在25℃的温度下，所包含的极限为0.8-1.15，与形成这种热塑性纤维的聚合物的溶解度参数; 并且在温度超过10℃的温度下加热整体，形成这种膜的聚合物的熔融温度超过20℃。形成存在于层中的合成纤维的聚合物的熔融温度其邻近纤维素纤维层，用于粘合复合片材。

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