VERFAHREN ZUR HERSTELLUNG EINER LIGNIN-BASIERTEN ZUSAMMENSETZUNG

    公开(公告)号:EP3380657A1

    公开(公告)日:2018-10-03

    申请号:EP16802032.9

    申请日:2016-11-25

    IPC分类号: D01F9/17 D01F9/00 C08L97/00

    CPC分类号: D01F9/17 C08L97/005 D01F9/00

    摘要: The invention relates to a method for producing a melt-spinnable lignin-based composition. Said method is characterised in that a reaction mixture containing lignin and/or a lignin derivative in the form of an esterified or etherified lignin as reactive component A and a formaldehyde-releasing compound which is solid at room temperature (20°C) as reactive component B, is subjected to a reactive extrusion at an increased temperature, the reaction mixture being adjusted to a complex viscosity of below 1500 Pa.s, especially between 10 and 1300 Pa.s. The invention also relates to the use of the melt-spinnable lignin-based composition obtained by the method according to the invention, for producing precursor fibres of carbon fibres by melt extrusion at an increased temperature, especially in a temperature range of between 100 and 200°C, and subsequent thermostabilisation of the precursor fibres obtained, and to the use thereof for producing carbon fibres. Said methods are easy to carry out. Carbon fibres are obtained, which are characterised by advantageous values of tensile strength and elastic modulus.

    VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON VORGARNLUNTE
    5.
    发明授权
    VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON VORGARNLUNTE 有权
    方法和设备用于生产VORGARNLUNTE

    公开(公告)号:EP1560960B1

    公开(公告)日:2007-01-24

    申请号:EP03772296.4

    申请日:2003-11-03

    CPC分类号: D01H1/115 D01H5/72

    摘要: Disclosed is a sliver which is suitable as a feed to be spun into a filament yarn, e.g. on a ring spinner, and is produced from a drawframe sliver (S) that is drawn in a drawing frame (3) and is then provided with a spin, whereupon said sliver is wound onto a feed bobbin (5). The fiber strand which leaves the drawing frame is provided with a spin in a first pneumatic spinning chamber (1) comprising a passage duct in which air jets act upon the fiber strand so as to create a spin counter to the direction of spinning in the following second pneumatic spinning chamber (2). The inventive method can be carried out by means of a pneumatic spinning device which provides the fiber strand leaving the drawing frame with a spin and a device for receiving the finished fiber sliver, for example. The drawing frame comprises no sliver compactor that is arranged upstream of the drawing frame outlet and combines the fiber strand. A first and a second spinning chamber (1, 2), through which the fiber strand successively runs when leaving the drawing frame and which create opposite spinning effects on the fiber strand, are disposed downstream from the pair of discharge rollers (31) of the drawing frame.

    Riemchen für Doppelriemchenstreckwerke
    10.
    发明公开
    Riemchen für Doppelriemchenstreckwerke 失效
    双皮圈牵伸系统的皮带

    公开(公告)号:EP1191136A2

    公开(公告)日:2002-03-27

    申请号:EP01129186.1

    申请日:1998-02-16

    IPC分类号: D01H5/86 D01H5/72

    摘要: Die Erfindung betrifft ein Riemchen für Doppelriemchenstreckwerke für Spinnereimaschinen mit einer Faserbündelungszone, die sich dem Ausgangswalzenpaar des Hauptverzugsfeldes anschließt und der das Lieferwalzenpaar folgt. Die zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar angeordnete pneumatische Verdichtungseinrichtung weist ein perforiertes Riemchen auf, das Durchbrechungen besitzt, durch die ein Saugluftstrom hindurchtritt, um auf den Faserverband einzuwirken. Es sind Durchbrechungen vorgesehen, deren Ausdehung quer zur Fasertransportrichtung größer als in Fasertransportrichtung ist.

    摘要翻译: 本发明涉及一种用于具有纤维束区的纺纱机的Doppelriemchenstreckwerke带,其邻接主牵伸区的一对输出辊并且跟随该对输送辊。 布置在所述一对输送辊和所述一对输送辊之间的气动压缩装置具有穿孔带,穿孔带具有孔,吸入空气流经过所述孔以作用于纤维结构。 提供了开口,该延伸横向于光纤传输方向大于光纤传输方向。