PIGMENT PRINTING

  • View
    69

  • Download
    1

Embed Size (px)

DESCRIPTION

PIGMENT PRINTING. DIFFERENCE BETWEEN DYE AND PIGMENT PIGMENT NO AFFINITY TO FIBRE INSOLUBLE IN WATER NEED BINDER FOR FIXATION ONTO FIBRE DYE AFFININTY TO FIBRE WATER SOLUBLE OR CAN BE MADE WATER SOLUBLE. EXCEPTION DISPERSE DYE HELD ON FIBRE DYE-FIBRE INTERACTIVE FORCES. BINDER. - PowerPoint PPT Presentation

Text of PIGMENT PRINTING

  • PIGMENT PRINTINGDIFFERENCE BETWEEN DYE AND PIGMENTPIGMENTNO AFFINITY TO FIBREINSOLUBLE IN WATERNEED BINDER FOR FIXATION ONTO FIBREDYEAFFININTY TO FIBREWATER SOLUBLE OR CAN BE MADE WATER SOLUBLE. EXCEPTION DISPERSE DYEHELD ON FIBRE DYE-FIBRE INTERACTIVE FORCES

  • BINDERIT IS PRE-POLYMER AVAILABLE IN THE FORM OF AQUESOUS EMULSIONCHEMICAL NATURECOPOLYMER OF STYRENE-BUTYL ACRYLATE-N-METHYLOL ACRYL AMIDE

  • MECHANISM OF BINDINGSEQUENCEPRINT > DRY > CURE

    DURING CURING: BINDER POLYMERISES AND FORMS A STRONG FILMBINDER FILM EMBEDES PIGMENT COLOUR AND ALSO STRONGLY ADHARES TO THE FIBRE

  • CHOICE OF THICKENERCONVENTIONAL THICKENER USED FOR DYE PRINTING ARE NOT SUITABLETHEY INTERACT WITH BINDER AND REDUCE ITS INTERATION WITH FIBRE. THUS AFFECTING THE FASTNESS PROPERTIESSUITABLE THICKENERSEMULSION THICKENER ZERO SOLID CONTENT THICKENERSYNTHETIC THICKENER - VERY LOW SOLID CONTENT THICKENER

  • EMULSION THICKENEROBTAINED BY EMULSIFICATION OF TWO IMMISCIBLE LIQUIDS WITH THE HELP OF EMULSIFIER

    TWO TYPESOIL-IN-WATER EMULSIONWATER-IN-OIL EMULSIONCOMMONLY USED IS OIL-IN-WATER

  • PREPARATION OF OIL-IN-WATER EMULSIONBINDER100 PARTSWATER100-150 PARTSEMULSIFIER20 PARTSUREA20 PARTSCMC (4-6% PASTE)10 PARTSKEROSENE OIL 750-800 PARTSMINERAL TURPENTINE OILVERY SLOW ADDITION OF OILCONTINUOUS HIGH SPEED STIRRING

    EMULSIFIER: REDUCE SURFACE ENERGY BETWEEN OIL AND WATERUREA: HYGROSCOPIC AGENT, MINIMIZE WATER EVAPORATION IN CONTINUOUS PHASECMC: PROTECTIVE COLLOID

  • EMULSION THICKENERMERITSIDEAL FOR PIGMENT PRINTINGDEMERITSINFLAMMABLE- FIRE HAZARDSAIR POLLUTIONHIGH COSTFABRIC SMEES DUE TO RESIDUAL k.OIL OR MTO. NOT ACCEPTABLE IN EXPORT MARKET

  • SYNTHETIC THICKENERCHEMICAL NATUREHIGH MOL.Wt. COPOLYMERS OF ACRYLIC OR METHACRYLIC ACIDHAVE FREE COOH GROUPS ON POLYMERIC CHAINS WHICH A ROLE IN VISCOSITY BUILD UPTRADE PRODUCTS: AQUEOUS EMULSION, ACID pHCONCENTRATION FOR PRINTABLE VISCOSIT 1-2%

  • MECHANISM OF THICKENINGSYNTHETIC THICKENER IN ACID FORMWATER INSOLUBLE, LOW VISCOSITY, NON-IONIZED COOH GROUPS

    SYNTHETIC THICKENER IN NEUTRIZED FORMWATER SOLUBLE, SWELLABLE, HIGH VISCOSITYIONIZED COOH GROUPS

  • SYNTHETIC THICKENERMERITSNO AIR POLLUTIONNO RISK OF FIRE AND EXPLOSIONNO SPECIAL STORAGE REQUIREMENTSNO FABRIC SMELLDEMERITSELECTRLYTE SENSITIVITYSLIGHTLY DULL PRINTS AND HARSH FABRIC FEELLONGER DRYING TIME

  • PREPARATION OF THICKENER PASTE

    BINDER100 PARTSWATER 80-890 PARTSSYNTH. THICKENER10-20 PARTSLIQUOR AMMONIATO pH 8

  • PRINT PASTE COMPOSITIONPIGMENT COLOURX PARTSTHICKENER PASTETO MAKE 1000 PARTSDIAMM. PHOSPHATE10 PARTSMELAMINE FORMALDEHYDE 10 PARTSSEUENCEPRINT > DRY > CURE AT 140-1500 C FOR 4-5 MIN. NO WASH

  • MERITS AND DEMERITSPRACTICALLY ALL TYPES OF FIBRES AND BLENDS CAN BE PRINTEDPIGMENT COLOURS CAN BE READILY MIXED WITH EACH OTHER TO GET QUICK SHADE MATCHINGNO AFTER TREATMENT SUCH AS WASHING, SOAPING REQUIREDDEMERITSHARSH FABRIC FEEL DUE TO BINDER FILMLOW RUBBING FASTNESS