Patent Publication Number: US-4546026-A

Title: Simulated cashmere fabric and method

Description:
BACKGROUND TO THE INVENTION 
     This invention relates to simulated cashmere fabric and methods for making the same. 
     BRIEF DESCRIPTION OF THE INVENTION 
     The invention comprises a simulated cashmere fabric comprising a warp-knit ground comprising a stretch yarn and a raised and cropped face. 
     The stretch yarn, may be an elastomeric yarn such as &#34;Lycra&#34; (Registered Trade Mark). 
     The ground fabric may be a two-bar fabric, and may comprise different yarns. 
     The ground fabric may comprise a continuous filament yarn, such as polyester, which may be untexturised. 
     The face yarn may be a continuous filament yarn which may again be an untexturised multifilament polyester yarn. 
     The face yarn may be knitted over a plurality of needles, for example over five needles. 
     Preferably, the face yarn is of the same material as is comprised in the fabric, so that the face yarn and one ground yarn can be the same multifilament polyester yarn. The raised and cropped pile, simulating the hairyness of a cashmere fabric, will then dye to the same shade as the ground fabric, giving the effect that the pile is an integral part of the ground fabric. 
     The invention also comprises a method for making a simulated cashmere fabric comprising warp-knitting a ground fabric together with a face yarn and raising and cropping the face yarn. 
     The fabric may be dyed before the raising and cropping steps, and may be crushed and steamed after the raising and cropping steps. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     One embodiment of a simulated cashmere fabric and a method for making the same according to the invention will now be described with reference to the accompanying drawings in which: 
     FIG. 1 is a point pattern diagram showing the motions of the bars of a warp knitting machine for knitting the fabric, and 
     FIG. 2 is a schematic diagram showing the various steps required in cropping and raising and finishing the fabric. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     A three bar warp knitting mchine is threaded on Bar 1 with a full set of a 44 d/tex &#34;Lycra&#34; (Registered Trade Mark) or similar elastomeric yarn, on Bar 2 and Bar 3 with 76 d/tex 30 filament bright round polyester yarn, full set threading in each case. The motions of the bars set on the pattern chain are illustrated in FIG. 1. Bar 1 lays-in the elastomeric yarn over adjacent needles, Bar 2 knits a tricot base fabric with the laid-in elastomeric yarn, while Bar 3 knits in the face yarn over five needles so that there are long floats of this face yarn which are broken during the raising step and subsequently cropped to leave a fine pile of relatively short &#34;hairs&#34; on the face of the fabric. 
     As seen in FIG. 2, the knitted fabric, prior to the raising and cropping steps, is dyed. The face yarn and the tricot ground yarn being the same polyester yarn, of course, dye to the same shade. Elastomeric yarns such as &#34;Lycra&#34; (Registered Trade Mark) are temperature-sensitive, so the dyeing should be carried out at a suitably low temperature. Dyeing at less than 115° C. is necessary in the case of &#34;Lycra&#34;. 
     The dyeing step is followed by a hot stentering step, after which the fabric is raised under high tension, then the raised pile cropped. This is followed by a crushing and steaming step, followed by a second hot stentering step. The fabric can then be packed for sale. 
     Simulated stretch cashmere fabric made as described is suitable inter alia as an automobile upholstery fabric.