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Hi All, Pls see ppt on geometrical print bowing, which is a general issue, Hope this will help you to understand. Best, Sukhvir
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BOWING IN GEOMETRICAL PRINTS
By:-Sukhvir Sabharwal
Triburg ///
Vertical line
Horizontal Lines
Geometrical prints are basically the prints which are made/developed from geometrical shapes like circle , rectangle, straight lines etc. as below
Geometrical prints are always bi-birectional i.e. have a horizontal as well as veritcal axis as
shown below
Vertical
Horizontal lines
WHY DOES BOWING HAPPEN?• In Textile mills, maximums motions are negative motions i.e. the front rolls
drives the fabric & due to tension created by the fabric movement, back roll moves. In this condition the central part of fabric runs in tension while the side selvedge area become loose causing displacement
• Displacement is higher in case of lighter weight fabric like voiles , chiffons , gauzes etc where as in case of heavy fabrics like poplin/canvas, displacement is very minimal.
• The yarn displacement becomes the prime reason for bowing in fabrics.• As a standard rule, for a medium weight fabric like cambric, the skewing
%age is 3-5% where as in case of light weight chiffons & voiles the bowing goes up to 8-10%also.
BOWING IN GEOMETRICAL PRINTS• In geometrical prints, 2grains lines are visible, horizontal & vertical.• Hence in case of geometrical prints, even a slightest yarn displacement
will be visible in form of bowing/skewing.• As a normal case, same bowing level of geometrical prints will have a
higher visibility than floral / abstract prints
PRECATIONS TO BE TAKEN TO CONTROL BOWING
• Light weight qualities should be run on such machinery which exerts lesser tension. Like in case of voile, mill prefers winch or soft flow machine instead of CDR or jiggers
• The fabric rolls should be stitched correctly to avoid bowing at stitching areas
• Bowing controller to be installed at stenter are to minimize bowing.
Thank You !
