Method for dying a web of knitted fabric containing cellulose fibers

Abstract

A method for dyeing a web of knitted fabric containing cellulose fibers is described. In order to achieve the result of being able to continuously dye the knitted goods containing cellulose fibers in the spread-out state, using a pad, as well as dry it in-line, in a subsequent dyeing hotflue, and fix the color, the knitted fabric is first caught along the longitudinal edges in continuously transporting stentering chains, and then transverse strips of glue are applied to the longitudinal edges, reinforcing the longitudinal edge regions, adjacent to the stentering chains. The glue is dried and subsequently the web that has been released from the stentering chains is passed continuously through the dyeing pad and the dyeing hotflue, spread out, fundamentally like a woven web of fabric.

1 . Method for dyeing a web of knitted fabric ( 1 ) containing cellulose fibers, whereby strips of glue are applied to the edge regions ( 9 ), adjacent to the longitudinal edges ( 10 ) of the fabric web, before dyeing, and stiffened by means of drying, whereby the fabric web is dyed in a dyeing pad ( 17 ) and then dried in a dyeing hotflue ( 21 ) and the color is fixed, comprising the following stages, i.e. steps: 
 a) Spreading out the fabric web ( 1 ), which tends to curl up at both longitudinal web edges ( 10 );    b) Continuously stentering the fabric web ( 1 ), by means of attaching the two longitudinal edges ( 10 ) to continuously transporting stentering chains ( 6 ,  7 );    c) Applying glue strips in the fabric web running direction ( 2 ), in the form of transverse glue strips interrupted by glue-free regions, whereby the length of the glue strips (measured proceeding from the edge of the fabric web crosswise to the running direction) is on the order of 1/25 of the axial distance between the upper and lower rollers ( 25 ,  26 ) of the dyeing hotflue ( 21 ), but at least approximately 1 cm;    d) Releasing the fabric web ( 1 ) from the stentering chains ( 6 ,  7 ) before it runs into the dyeing pad ( 17 ); and    e) Designing the dyeing hotflue ( 21 ) to guide the fabric web ( 1 ) with a uniform longitudinal tension of the fabric on the order of 10 newtons±5 newtons.    
   
   
       2 . Method according to  claim 1 , wherein a dyeing hotflue ( 21 ) having lower and/or upper rollers ( 24 ,  25 ) that are driven individually or in groups is used.  
   
   
       3 . Method according to  claim 1 , wherein the transverse glue strips, seen in the web running direction ( 2 ), are made to be on the order of twice as wide as the regions free of glue.