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PRINTING OF POLYESTER

PRINTING OF POLYESTER. DYE CLASS : DISPERSE METHODS OF DYE FIXATION ATMOSPHERIC STEAMING PRESSURE STEAMIG DRY HEAT (THERMOSOL) HIGH TEMPERATURE STEAMING. THICKENER CHOICE. HIGH SOLID CONTENT THICKENER IS PREFERRED ESPECIALLY WHEN PRINTS ARE FIXED BYSTEAMING

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PRINTING OF POLYESTER

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  1. PRINTING OF POLYESTER • DYE CLASS : DISPERSE METHODS OF DYE FIXATION • ATMOSPHERIC STEAMING • PRESSURE STEAMIG • DRY HEAT (THERMOSOL) • HIGH TEMPERATURE STEAMING

  2. THICKENER CHOICE • HIGH SOLID CONTENT THICKENER IS PREFERRED ESPECIALLY WHEN PRINTS ARE FIXED BYSTEAMING • THE THICKENER FILM SHOULD ADHARE WELL AND PRODUCE AN ELASTIC FILM TO PREVENT CRACKING AND FLAKING OFF • LOW SOLID CONTENT THICKENER GIVE BETTER COLOUR YIELD IN THERMOSOL PROCESS • MIXTURE OF NATURAL THICKENER AND EMULSION THICKENER IS USEFUL SINCE MINERL OIL GIVES WETTING OF HYDROPHOBIC POLYESTER FABRIC. THE MIXED THICKENER INCREASE LEVELNESS AND DYE PENETRATION IN THE FIBRE • THE THICKENER FILM SHOULD EASILY BE REMOVED DURING WASHING OPERATION • MODIFIED GUAR GUM (INDALCA AGBV) IS WIDELY USED

  3. PRINT PASTE COMPOSITION DISPERSE DYE 20-50 PARTS DISPERSING AGENT 20 PARTS WATER 150 PARTS SODIUM CHLORATE 5 PARTS THICKENER PASTE TO MAKE 1000 PARTS • SODIUM CHLORATE (MILD OXIDIZING AGENT) PROTECT THE BRIGHTNESS OF PRINTS AGAINST ANY POSSIBLE REDUCTION OF DYESTUFF UNDER PROLONGED STEAMING CONDITIONS SEQUENCE PRINT > DRY > FIXATION > WASH > SOAP (TEMP NOT TO EXCEED 600 C )> WASH > DRY

  4. DYE FIXATION • PRESSURE STEAMING AT 25 PSI, 1300 C FOR 30-45 MIN. • HIGH TEMPERATURE STEAMING (SUPER HEATED) AT 170-1800C FOR 5-7 MIN. • HOT AIR (THERMOSOL) AT 190-2000 C FOR 45-60 SEC. AFTER TREATMENT • COLD WATER RINSE > HOT WATER RISNSE > SOAPING 600 C > HOT AND COLD WATER RINSE

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