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    • 1. 发明授权
    • Water-retentive cellulose fiber, method of manufacturing the same, and
water-retentive sheet comprising cellulose fiber of high water
retentivity
    • 保水性纤维素纤维,其制造方法以及含有高保水性的纤维素纤维的保水性片材
    • US5998025A
    • 1999-12-07
    • US66297
    • 1998-04-27
    • Tsutomu KidoNoriyuki KimuraIchiro TakeuchiKazuya Umino
    • Tsutomu KidoNoriyuki KimuraIchiro TakeuchiKazuya Umino
    • A61F13/53A61F13/15A61F13/49B01J20/26D01D5/30D01F2/06D01F8/02D04H1/42D04H3/00D04H13/00D06M11/00D06M11/07D06M101/00D06M101/02D06M101/06D06M101/16D06M101/18D02G3/00D01F5/32
    • D01F8/02D01F2/06D04H1/4258Y10T428/249921Y10T428/2924Y10T428/2929Y10T428/2965Y10T442/3146Y10T442/637Y10T442/638
    • A powdered super absorbent polymer (SAP) has heretofore been used as a water retentive material for sanitary products, such as sanitary napkin, disposable diaper and incontinence pad. This water retentive material is used by being held between two paper sheets but the powdered SAP comes off easily from absorbent member. Moreover, even when the SAP is in a dried powdered state or in a water-absorbed gel state, it is moved between a top sheet and a back sheet in accordance with the movement of a wearer of the sanitary product. Consequently, water absorbency decreases with poor shape stability. Moreover, since the SAP in a water-absorbed gel state is sticky, the wearer feels unpleasant.According to the present invention, therefore, a cellulose fiber, such as a viscose rayon fiber containing uniformly a non-cellulose based material of high water absorbency such as polyacrylate salt is manufactured. A fiber web and nonwoven fabric produced of this fiber is used as water retentive materials in an absorbent member. This fiber has high absorbency and moreover high water retentivity such that water absorbed into the fiber is hardly released from the fiber. Accordingly, an absorbent member formed of a sheet made of this fiber has a stable shape both when it is in a dry state and when it is in a water-absorbed state, and, moreover, it has high absorbency and high water retentivity. Therefore, when this water-retentive sheet is used, a thin absorbent member of high absorbency can be provided.
    • PCT No.PCT / JP96 / 03171 Sec。 371日期1997年4月27日 102(e)日期1997年4月27日PCT 1996年10月30日PCT PCT。 公开号WO97 / 16586 日期1997年5月9日迄今为止,已经将粉末状高吸水性聚合物(SAP)用作卫生用品,例如卫生巾,一次性尿布和失禁垫等的保水性物质。 这种保水材料被保持在两个纸张之间,但粉状SAP容易从吸收部件脱落。 此外,即使当SAP处于干燥的粉末状态或吸水凝胶状态时,根据卫生产品的穿着者的移动,其在顶片和背片之间移动。 因此,吸水性随着形状稳定性的降低而降低。 此外,由于SAP在吸水凝胶状态下是粘性的,佩戴者感到不愉快。 因此,根据本发明,制造纤维素纤维,例如均匀地含有高吸水性的非纤维素基材料如聚丙烯酸盐的粘胶人造丝纤维。 将由该纤维制成的纤维网和非织造织物用作吸湿件中的保水材料。 该纤维具有高的吸收性和高的保水性,使得吸收到纤维中的水难以从纤维中释放出来。 因此,由这种纤维制成的片材形成的吸收件在处于干燥状态时和处于吸水状态时都具有稳定的形状,而且具有高的吸收性和高的保水性。 因此,当使用该保水性片材时,可以提供高吸收性的薄吸收体。