Cellulose fibres and filaments having a high elongation at break
    4.
    发明授权
    Cellulose fibres and filaments having a high elongation at break 失效
    具有高断裂伸长率的纤维素纤维和长丝

    公开(公告)号:US6068919A

    公开(公告)日:2000-05-30

    申请号:US125351

    申请日:1998-08-25

    IPC分类号: D01F2/02 D01F11/02 D21B1/00

    摘要: Cellulose fibres and filaments are prepared from a spinnable, cellulose-containing solution containing 94-100 wt. % cellulose, water, and phosphoric acid and/or anhydrides of phosphoric acid. The resulting cellulose fibres and filaments have an elongation break point greater than 7%. The cellulose-containing solution used to prepare the fibres and filaments may be either isotropic or anisotropic. The cellulose-containing solution is coagulated in a liquid containing water and cations, and the cations are preferably monovalent. Fibres and filaments prepared in this manner are especially suitable for use in textiles.

    摘要翻译: PCT No.PCT / EP97 / 00693 Sec。 371日期:1998年8月25日 102(e)日期1998年8月25日PCT提交1997年2月13日PCT公布。 公开号WO97 / 30198 PCT 日期1997年8月21日纤维素纤维和长丝由可旋转的含纤维素的溶液制备,该溶液含有94-100wt。 %的纤维素,水和磷酸和/或磷酸的酸酐。 得到的纤维素纤维和长丝的伸长断裂点大于7%。 用于制备纤维和长丝的含纤维素溶液可以是各向同性的或各向异性的。 含有纤维素的溶液在含有水和阳离子的液体中凝结,阳离子优选为一价。 以这种方式制备的纤维和长丝尤其适用于纺织品。

    Process for the preparation of regenerated cellulose filaments
    5.
    发明授权
    Process for the preparation of regenerated cellulose filaments 失效
    制备再生纤维素长丝的方法

    公开(公告)号:US5997790A

    公开(公告)日:1999-12-07

    申请号:US97534

    申请日:1998-05-19

    摘要: The disclosure describes a process for the preparation of regenerated cellulose filaments from an anisotropic solution including cellulose formate, phosphoric acid, and formic acid in which the formed cellulose formate filaments are dried to a moisture content of not more than 15% prior to regeneration and after regeneration the filaments are washed and dried under low tension. In this manner cellulose multifilament yarns of high breaking load and high elongation at break can be obtained, which in addition have a very regular linear density.

    摘要翻译: 本公开内容描述了一种从包括甲酸纤维素,磷酸和甲酸的各向异性溶液制备再生纤维素长丝的方法,其中所形成的纤维素甲酸纤维素在再生之前和之后干燥至含水量不超过15% 再生长丝在低张力下被洗涤和干燥。 以这种方式,可以获得高断裂负荷和高断裂伸长率的纤维素复丝纱线,此外还具有非常规则的线密度。

    Method for the preparation of a material with high water and salt
solutions absorbency
    6.
    发明授权
    Method for the preparation of a material with high water and salt solutions absorbency 失效
    制备具有高水和盐溶液吸收性的材料的方法

    公开(公告)号:US6027536A

    公开(公告)日:2000-02-22

    申请号:US117876

    申请日:1998-08-06

    CPC分类号: D01F2/02 C08B1/003 C08B5/00

    摘要: A process for preparing a material having a high water and salt solutions absorbency, the material containing mainly cellulose that is dissolved in a solvent containing phosphoric acid, a solution is obtained that contains 94-100 wt. % of the following constituents:cellulose,phosphoric acid and/or its anhydrides, andwater,the solution is then coagulated and washed in a liquid containing less than 50 wt. % of water. This process can be used to obtain cellulose products, such as fibers or pulp, which have a high water and (isotonic) salt solutions absorbency.

    摘要翻译: PCT No.PCT / EP97 / 00652 Sec。 371日期1998年8月6日 102(e)1998年8月6日PCT PCT 1997年2月12日提交PCT公布。 公开号WO97 / 30090 日期1997年8月21日一种制备具有高水溶性和盐溶液吸收性的材料的方法,该材料主要含有溶解在含有磷酸的溶剂中的纤维素,得到含有94-100wt。 以下组分的%:纤维素,磷酸和/或其酸酐和水,然后将溶液凝结并在含有小于50wt。 %的水。 该方法可用于获得具有高水和(等渗)盐溶液吸收性的纤维素产品,例如纤维或纸浆。

    Composite materials comprising PPTA and nanotubes
    7.
    发明申请
    Composite materials comprising PPTA and nanotubes 失效
    包含PPTA和纳米管的复合材料

    公开(公告)号:US20090252960A1

    公开(公告)日:2009-10-08

    申请号:US12382988

    申请日:2009-03-27

    IPC分类号: D02G3/22 B82B1/00

    摘要: Disclosed is a composite material comprising PPTA (poly-p-phenyleneterephthalamide) and nanotubes having an aspect ratio of at least 100 and a cross-sectional diameter of 5 nm or less, the composite material containing up to 12 wt. % of nanotubes, obtainable by adding the nanotubes to sulfuric acid, decreasing the temperature to solidify the mixture, adding PPTA to the solid mixture, heating to above the solidifying point and mixing the mixture, and spinning, casting, or molding the mixture to the composite material.

    摘要翻译: 公开了包含PPTA(聚对苯二甲酰对苯二胺)和纵横比为至少100且横截面直径为5nm以下的纳米管的复合材料,该复合材料含有至多12wt。 通过将纳米管加入到硫酸中可获得的纳米管的百分比,降低温度以固化混合物,将PPTA加入到固体混合物中,加热到凝固点上方并混合该混合物,并将该混合物纺丝, 复合材料。

    Process for preparing cellulose fibers
    8.
    发明授权
    Process for preparing cellulose fibers 有权
    制备纤维素纤维的方法

    公开(公告)号:US06156253A

    公开(公告)日:2000-12-05

    申请号:US319697

    申请日:1999-06-25

    IPC分类号: D01F2/02

    CPC分类号: D01F2/02

    摘要: A process for preparing fibers from an optically anisotropic solution containing either one of cellulose or cellulose derivatives by extruding the solution through a non-corroding spinneret and coagulating the resulting extrudates in a coagulant, the coagulant being a liquid which contains mostly water and to which cations have been added.

    摘要翻译: PCT No.PCT / EP97 / 06955 371日期1999年6月25日第 102(e)1999年6月25日PCT 1997年12月3日PCT PCT。 公开号WO98 / 30741 PCT 日期1998年7月16日一种由含有纤维素或纤维素衍生物的光学各向异性溶液制备纤维的方法,该方法是通过非腐蚀喷丝头挤出溶液并将所得挤出物凝结在凝结剂中,凝结剂是主要含有的液体 水,并加入了阳离子。

    Composite materials comprising PPTA and nanotubes
    9.
    发明授权
    Composite materials comprising PPTA and nanotubes 失效
    包含PPTA和纳米管的复合材料

    公开(公告)号:US07534486B2

    公开(公告)日:2009-05-19

    申请号:US10588160

    申请日:2005-03-18

    IPC分类号: B32B27/04

    摘要: The invention pertains to a composite material comprising PPTA (poly-p-phenyleneterephthalamide) and nanotubes having an aspect ratio of at least 100 and a cross-sectional diameter of 5 nm or less, the composite material containing up to 12 wt. % of nanotubes, obtainable by adding the nanotubes to sulfuric acid, decreasing the temperature to solidify the mixture, adding PPTA to the solid mixture, heating to above the solidifying point and mixing the mixture, and spinning, casting, or molding the mixture to the composite material.The process comprises the steps: a) adding nanotubes having an aspect ratio of at least 100 and a cross-sectional diameter of 5 nm or less to sulfuric acid at a temperature above the solidifying point of the sulfuric acid; b) decreasing the temperature to below the solidifying point of the sulfuric acid and mixing for a sufficient time to solidify the mixture; c) adding PPTA to the solid mixture; and d) heating to above the solidifying point and mixing the mixture.

    摘要翻译: 本发明涉及包含PPTA(聚对苯二甲酰对苯二胺)和纵横比至少为100且横截面直径为5nm或更小的纳米管的复合材料,该复合材料含有至多12wt。 通过将纳米管加入到硫酸中可获得的纳米管的百分比,降低温度以固化混合物,将PPTA加入到固体混合物中,加热到凝固点上方并混合该混合物,并将该混合物纺丝, 复合材料。 该方法包括以下步骤:a)在高于硫酸固化点的温度下,向硫酸中加入纵横比为至少100,横截面直径为5nm或更小的纳米管; b)将温度降低到硫酸的凝固点以下并混合足够的时间以固化混合物; c)向固体混合物中加入PPTA; 和d)加热到固化点上方并混合混合物。