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Prepared By : Mazadul Hasan sheshir ID: 2010000400008 13 th Batch (session 2009-2013) Department : Wet Processing Technology Email: mazadulhasan@yahoo.com Blog : www. Textilelab.blogspot.com (visit) Southeast University Department Of Textile Engineering I/A 251,252 Tejgaon Dhaka Bangladesh !" # !" ! $ %# & ' • & • ( ) *+,-! . &/ 01 2 3" 4 3 5 36, 7 8 9 :" ; *- )<# ) . = 2 "= 4 , 5 !" 7 8 9 6 ; 6! :+3# , & 3-5+)< & >.?4?9?@ 3)A.-!! - B )A. !" 6, !& "*-"- :" "3A " A",C- , # : ,/ $A 5 $:D ..4 # - %/ ( 3 "& E >@6F >@DF >@ F >@>+@ G+ 0 G+ + 0H+ #3-/3>/3@!#>@ #>'@>(@>&@# >I@ &'()(**(+, /(0 (+1)+2,)-(0 (+ +2,)-(0 )@ .@ C 2@ )@ "" .@ ( 2@ I! JI!"K JL' [...]... costlier Two Sided foam application with transfer roller: In this case, two sided foam application is done by using transfer roller and dosage shots This is developed by “KUESTER” It is called Janus minifoam applicator Advantages 1) 2) Doctor blade can control foam Two sided application of foam Disadvantages 1) 2) 3) More costlier Foam collapse is not good Suitable for delicate fabric Foam Application... Pages 1 Yarn Manufacturing Technology Link : http://www.facebook.com/pages/Yarn-Manufacturing -Technology/ 485014954866808 2 Fabric Manufacturing Technology Link : http://www.facebook.com/pages/Fabric-Manufacturing -Technology/ 459520217425605 3 Garments Manufacturing Technology Link : http://www.facebook.com/pages/Garments-Manufacturing -Technology/ 472364799463126 3 Wet processing Technology Link : http://www.facebook.com/pages/Wet-Processing -Technology -Dyeing- /468645219825404... textile processing Condensation foam: It is formed from the generation of a gas within the liquid, either by chemical reaction or by physical change E.g [fig] COLLAPSE OF FOAM: • Inter lamellar liquid drains out of spherical foam cells • The lamellae grow thinner, exchange of gas or breakage of lamellae, small bubbles aggregates to foam bugger bubbles until finally the foam collapse #Salt brings dye... Process/Application: Auxiliary chemicals FOAM GENERATION: Continuous foam application technique flow chart is as follows: FOAM EVALUATION CRITERIA: • • • • • Blow-Ratio: The blow ration expresses the volumetric ration of liquid to foam Range of application: 1 : 8 – 1 : 15 Bubble Size: Range: 0.1 – 0.3 mm dia Homogeneity: Constant sizes Ionic Nature: 1 ) Anionic Surfactants which has more foaming power, not very sensitive... Foaming power less than anionic Foaming power reduced by temperature and addition of electrolytes 3) Cationic: Unused • Drop Escape Time: This is the time that elapses before the first drop of liquid emerges from the foam Range: 45 – 90 cc Uneven application, possibility of less…………… • Half Life period: It is the time taken for one half of the liquid in a definite volume to drain Range: 4 -60 min FOAM. .. types of foam application system Such as- HORIZONTAL PADDING MANGLE: Advantage 1) 2) 3) Better wetting power Better Foam Decay Lower Investment cost Disadvantage 1) 2) Only suitable for woven fabric Tailing or ending effect occurs APPLICATION WITH A COATING BLADE: Here, foam collapse with squeeze roller This process is called “VALCHEM” process Advantage 1) 2) Better wetting power Better foam decay...FOAMING AGENT: Sancowad Foamer NT (Clariant), Nekanil LN (BASF) 1 Generate foam readily 2 Wide range of wetting technology 3 Fast & uniform wetting action 4 Little or no effect on color fastness 5 Compatible with other products 6 Least affected by water hardness... indirect doctor blade: Here, foam application is done by indirectdoctor blade dosage and foam collapse is controlled by vacuum cylinder suction It is developed by “MONFORTS” Advantage 1) 2) 3) Better collapse Better foam control Wet on Wet: It helps multiple dosing of chemical; however more cost and fabric damage is possible due to pressure Disadvantage 1) 2) 3) One sided foam application More power... Capable to comply with specific requirement Foam is a medium only like water in regular wet processing technology Foam only replace water, other processing materials will be there for processing ADVANTAGE: 1 Low material, water for low m:l ratio 2 Low Waste 3 Eco-friendly 4 Energy Saving CLASSIFICATION: It can be classified in following categories: Dispersion foam: It is produced by the introduction... http://www.facebook.com/pages/Garments-Manufacturing -Technology/ 472364799463126 3 Wet processing Technology Link : http://www.facebook.com/pages/Wet-Processing -Technology -Dyeing- /468645219825404 4 Fashion-Design-and -Technology Link : http://www.facebook.com/pages/Fashion-Design-and -Technology/ 587655294583875?ref=ts&fref=ts . Mazadul Hasan sheshir ID: 2010000400008 13 th Batch (session 2009-2013) Department : Wet Processing Technology Email: mazadulhasan@yahoo.com Blog : www. Textilelab.blogspot.com (visit) Southeast