AVCO-TRYL HPH

ACIDIC COMPLEXING AGENT
AVCOTRYL HPH is an acidic complexing – dispersing agent used for de-mineralization of textile fabrics contaminated with calcium, magnesium and iron residues and metal containing lubricants.Use of AVCOTRYL HPH enables to perform an acidic treatment, followed by alkaline peroxide bleaching process, using the same bath.This procedure saves water and machine time.
AVCOTRYL HPH is an excellent complexing agent for dyeing synthetic fibres such as polyester, polyamide, spandex elastomers and blends in the acid pH.

SPECIFICATION:

Appearance Yellow brownish, clear liquid.
Chemical nature Aqueous solution of partially neutralized phosphonic acids.
Compatibility Is not compatible with concentrated alkalis and with cationic products.
Density (g/cc) App. 1.20
Ionicity Anionic
Solubility Miscible with water at any ratio
Storage Stable for at least 12 months.
pH (10g/l sol.) 3 – 4

PROPERTIES & USES:

  1. AVCOTRYL HPH is extracting precipitates of iron, calcium and magnesium non-
    soluble contaminations from textile fibres. After the de-mineralization process
    and adding alkali to the acidic bath, the product is complexing strongly the
    dissolved metal ions, and enables un-disturbed bleaching process with hydrogen
    peroxide. The results are improved whiteness, brilliancy and hydrophility of the
    treated fabrics.
  2. In alkaline pH AVCOTRYL HPH is acting also as a de-crystallizing agent of water
    hardness even when the quantity of total hardness is above the stoichiometric
    ratio.The product is dispersing calcium and iron precipitates, and keep them in a
    very fine dispersion, to avoid crystallization on the textile fabrics (threshold
    effect) .
  3. AVCOTRYL HPH is not lowering the strength of cellulosic fabrics and yarns.
  4. The complexing capacity toward iron ions is increasing when raising the pH to
    strong alkaline solutions. The product is an excellent complexing agent for
    causticizing and bleaching processes of cellulosic fabrics.
  5. AVCOTRYL HPH is non-foaming at all.
  6. The product is stable in acidic and in alkaline baths.
  7. AVCOTRYL HPH is an excellent booster to improve detergency in preparation and bleaching-processes. Acting as a protective colloid and dispersant to avoid re- deposition of suspended dirt on the treated textiles.
  8. AVCOTRYL HPH is suitable for dyeing polyester fibres with disperse dyes in acidic pH.
  9. AVCOTRYL HPH is suitable for dyeing polyamide and spandex fibres with acid dyes.
  10. AVCOTRYL HPH is complexing metal soaps included in spandex lubricating oils.

APPLICATION:

DE-MINERALIZATION PROCESS FOLLOWED BY BLEACHING OF COTTON KNITS
  1. DE-MINERALIZING:
    AVCO-BIOLUZE DCB 1.0 – 2.0g/l
    AVCOTRYL HPH 0.5 – 2.0g/l
    Treat at 80°c for 30 minutes
  2. NEUTRALIZING:
    To the original bath add 1-2 cc/l caustic soda (50%) and treat for 5 minutes.
  3. BLEACHING PROCESS:
    To the neutralized bath add:
    AVCO-BLANKINOL AWS – 3.0g/l
    hydrogen peroxide (50%) – 3.0g/l
    Treat at 90-95°c for 30-45 min.
  4. To the same bath add 1g/l AVCOSAN HPK and treat for 10 minutes to destroy residues of peroxide.
  5. Drop bath and rinse hot and cold.
DESIZING OF COTTON WOVEN FABRICS
  1. To the enzymatic desizing bath add 1 – 3 g/l AVCOTRYL HPH.
  2. Continue the normal washing and peroxide bleaching process in the continuous bleaching range.
DYEING SYNTHETIC FIBRES (POLYESTER AND POLYAMIDE)
  1. When dyeing synthetic fibres in the one shot scour / dye process, add 0.5-1.5 g/l AVCOTRYL HPH along with 1-2 g/l AVCO-BIOLUZE DCB or AVCO-BIOLUZE GLF, circulate for 5 -10 minutes, and start the dyeing process.
  2. When dyeing pre-scoured fabrics use 0.5 -1.0 g/l AVCOTRYL HPH to ensure trouble free dyeing process.
  3. When dyeing polyamide with pre – metalized dyestuffs, lab trials are advisable.