Cellulosic Staple Fiber and Its Use

Abstract

The present invention relates to the use of a multilobal cellulosic staple fiber as a filling fiber. Furthermore, the invention relates to a cellulosic staple fiber which is characterized in that the cross-section of the fiber has three or more lobes the titer of the fiber is 1.0 to 30 dtex, preferably more than 3.0 dtex, especially more than 5.0 dtex, preferably 5.6 to 10 dtex, especially preferred more than 6.0 dtex, especially 6.3 to 10 dtex the wet modulus of the fiber fulfils the following formula: Wet modulus (cN/tex)≧0.5*√T wherein T is the titer of the fiber in dtex the breaking strength of the fiber in the conditioned state fulfils the following formula: Breaking Strength (cN/tex)≧1.3*√T+2*T wherein T is the titer of the fiber in dtex.

1 . Cellulosic staple fiber, characterized in that
 the cross-section of the fiber has three or more lobes   the titer of the fiber is 1.0 to 30 dtex, preferably more than 3.0 dtex, especially more than 5.0 dtex, preferably 5.6 to 10 dtex, especially preferred more than 6.0 dtex, especially 6.3 to 10 dtex   the wet modulus of the fiber fulfils the following formula:   Wet modulus (cN/tex)≧0.5*√T wherein T is the titer of the fiber in dtex   the breaking strength of the fiber in the conditioned state fulfils the following formula:   Breaking Strength (cN/tex)≧1.3*√T+2*T wherein T is the titer of the fiber in dtex.   
   
   
       2 . Cellulosic staple fiber according to  claim 1 , characterized in that the numeric relation between area F of the fiber cross-section and the perimeter U of the fiber cross-section is preferably from 1.7:1 to 3.5:1. 
   
   
       3 . Cellulosic staple fiber according to  claim 1  or  2 , characterized in that the area of the fiber cross-section is higher by a factor of 2.30-fold or more, preferably 2.50-fold or more, especially preferred 2.70-fold and more, than the area of the largest equilateral triangle which is inscribed in this cross-section. 
   
   
       4 . Cellulosic staple fiber according to one of  claim 1 ,  2  or  3 , characterized in that the Syngina absorption capacity of the fiber is more than 6.0 g/g, preferably 6.5 g/g or more, especially preferred 6.8 g/g and more. 
   
   
       5 . Cellulosic staple fiber according to one of the preceding claims, characterized in that the fiber exhibits on its surface a substance increasing the slippage, especially silicone. 
   
   
       6 . Cellulosic staple fiber according to one of the preceding claims, characterized in that the fiber is modified by a compound selected from the group consisting of chitosan and chitosonium polymers. 
   
   
       7 . Cellulosic staple fiber according to one of the preceding claims, characterized in that the fiber is modified by a flame-retardant agent, preferably a modified or unmodified clay. 
   
   
       8 . Use of a multilobal cellulosic staple fiber as a filling fiber. 
   
   
       9 . Use according to  claim 8  as a filling fiber for duvets, cushions, pillows, mattresses, fleeces for upholstery, clothing and the like. 
   
   
       10 . Use according to  claim 8  or  9 , characterized in that the titer of the multilobal cellulosic staple fiber is 1.0 to 30 dtex, preferably more than 3.0 dtex, especially more than 5.0 dtex, preferably 5.6 to 10 dtex, especially preferred more than 6.0 dtex, especially 6.3 to 10 dtex. 
   
   
       11 . Use according to any of  claims 8  to  10 , characterized in that the cellulosic staple fiber is modified by a compound selected from the group consisting of chitosan and chitosonium polymers. 
   
   
       12 . Use according to any of  claims 8  to  11 , characterized in that the cellulosic staple fiber is modified by a flame-retardant agent, preferably a modified or unmodified clay. 
   
   
       13 . Use according to any of  claims 8  to  12 , characterized in that a cellulosic staple fiber according to any of  claims 1  to  7  is used. 
   
   
       14 . Filling material for duvets, cushions, pillows, mattresses, fleeces for upholstery, clothing and the like, containing a multilobal cellulosic staple fiber. 
   
   
       15 . Filling material according to  claim 14 , characterized in that the titer of the multilobal cellulosic staple fiber is 1.0 to 30 dtex, preferably more than 3.0 dtex, especially more than 5.0 dtex, preferably 5.6 to 10 dtex, especially preferred more than 6.0 dtex, especially 6.3 to 10 dtex. 
   
   
       16 . Filling material according to  claim 14  or  15 , characterized in that the multilobal cellulosic staple fiber is modified by a compound selected from the group consisting of chitosan and chitosonium polymers. 
   
   
       17 . Filling material according to any of  claims 14  to  16 , characterized in that the multilobal cellulosic staple fiber is modified by a flame-retardant agent, preferably a modified or unmodified clay. 
   
   
       18 . Filling material according to any of  claims 14  to  17 , characterized in that a cellulosic staple fiber according to any of  claims 1  to  7  is used. 
   
   
       19 . Filling material according to any of  claims 14  to  18 , especially in the form of a fleece, characterized in that it consists essentially of the multilobal cellulosic staple fiber. 
   
   
       20 . Filling material according to any of  claims 14  to  18 , characterized in that it contains additionally a further fiber and/or a further filling component. 
   
   
       21 . Filling material according to  claim 20 , characterized in that the further fiber and/or component is selected from the group consisting of synthetic fibers, especially polyester fibers, polyacrylic fibers, polyamide fibers, polylactate fibers; natural fibers, especially cotton, kapok, bast fibers, sisal, silk; man-made cellulosic fibers, especially viscose fibers, Modal fibers, Lyocell fibers; and/or animal hair, especially sheep wool, horsehair, rabbit wool, camel hair and cashmere. 
   
   
       22 . Filling material according to  claim 20  or  21 , characterized in that the further filling component is selected from the group consisting of down and feathers. 
   
   
       23 . Filling material according to any of  claims 14  to  22  in the form of a fibre ball. 
   
   
       24 . Filling material according to any of  claims 14  to  22 , characterized in that it is composed of various fleece-like layers, wherein at least one of said layers contains the multilobal cellulosic staple fiber.