NYLOFIX-RN | Dye Fixing Agent For Polyamide

• Product Information

   NYLOFIX-RN is a acid stable polyamide dye fixing agent dyed with metal complex  and acid dyes.

• Key Features & Benefits

  • Is a one bath fixing agent for metal complex dyes & acid dyes on nylon, wool and their blends with cellulosic or synthetics.
  • The fixing process and time can be shortened.
  • Nylofix-RN is an excellent reserving agent when dyeing nylon/cotton blends.
  • It imparts excellent fixing effect to improve the wet fastness of treated fabrics.
  • No detrimental influence on the color shade of nylon fabrics.
  • Improve the wet fastness of PA dyed with all common dye classes.
  • After treatment to improve the wet fastness of prints on PA.
  • Use in resist printing, especially on PA carpets.
  • Does not impair light fastness.
  • Low foaming.
  • Can be applied at pH 4.0 – 5.0.

   

• Application

  • Nylofix-RN (for lighter shades)                     :           1 – 2 % o.w.f
  • Nylofix-RN (for middle shades)                    :           2 – 3 % o.w.f
  • Nylofix-RN (for darker shades)                    :           3 – 5 % o.w.f

  Add Nylofix-RN into the bath, adjust the pH to 4.5 – 5 (with acetic acid or formic acid), and treat at 50- 55ºC for 30 mins.

• Properties

  Appearance                              :           Dark brown clear liquid

  Composition                             :           Polyphenolic type condensate

  Ionic nature                            :          Anionic

  pH (2% in distilled water)      :  7.0 ± 1.0

  Miscibility in water                :        Miscible

• other Information

  • The improvement in wet fastness properties obtained with Nylofix-RN is largely maintained ever after fixation in hot air, providing the amount of Nylofix-RN is increased by about 1/3rd and the fixation temperature does not exceed 185°C. Higher fixation temperature and treatment with saturated steam influence the effect of Nylofix-RN.
  • When formulating the after-treatment bath, make sure that dissolved or diluted Nylofix-RN does not come into contact with concentrated acetic acid as this can cause precipitation. However, this can be reversed easily by adding ammonia.
  • Nylofix-RN can impair the handle in the event of subsequent fixation.
  • After treatment with Nylofix-RN impairs the subsequent spinning properties of loose stock. For this application, it is advisable to use dyes which give better wet fastness properties without after treatment

   

  Important Note:

  Substrates which are to be laminated or coated with foam should not be after treated with condensation products of the Nylofix-RN type as this impairs adhesion.

  Improvement in fastness properties with Nylofix-RN:

  Improving the wet fastness properties of basic dyeable polyamide dyed with cationic dyes.

  Application

  The wet fastness properties of anionic modified polyamide dyed with cationic dyes can be improved by after treatment with

           Nylofix-RN                          :           1 - 3 %

           pH (with acetic acid)              :           5.0 – 6.0

           Temperature                        :           50 - 60°C

          Time                                     :           20 -30 mins

   

  • Reserving of polyamide fibers from direct dyes in one bath dyeing of polyamide / cellulosic blends:

   

  General:

  When dyeing polyamide /cellulosic blends in the one bath or one bath two-step process, Nylofix-RN can be used a reserving agent to prevent direct dyes staining the polyamide component.

  Amount required:

  Dye with an addition

  -     Nylofix-RN              :           0.5 – 0.75 %

  Method:

  Because of the excellent reserving effect of Nylofix-RN on special dye selection is necessary. However, its reserving action may be reduced if non-ionic leveling agents are use.

  Resist printing of PA carpets:

  One-step method Wet-in-Wet

  Print                 :        white or colored resist

  Nylofix-RN        :        4 -12 g/l

  Intermediate steaming apply colorants by pouring steam, wash – off, dry.

  Important Note:

  Substrates which are to be laminated or coated with foam should not be after treated with condensation products of the Nylofix-RN type as this impairs adhesion.

  Improvement in fastness properties with Nylofix-RN:

  Improving the wet fastness properties of basic dyeable polyamide dyed with cationic dyes.

  Application

  The wet fastness properties of anionic modified polyamide dyed with cationic dyes can be improved by after treatment with

  • Nylofix-RN                          :           1 - 3 %
  • pH (with acetic acid)             :           5.0 – 6.0
  • Temperature                        :           50 - 60°C
  • Time                                   :           20 -30 mins

   

  • Reserving of polyamide fibers from direct dyes in one bath dyeing of polyamide / cellulosic blends:

  General:

  When dyeing polyamide /cellulosic blends in the one bath or one bath two-step process, Nylofix-RNcan be used a reserving agent to prevent direct dyes staining the polyamide component.

  Amount required:

  Dye with an addition

  -     Nylofix-RN              :           0.5 – 0.75 %

  Method:

  Because of the excellent reserving effect of Nylofix-RN on special dye selection is necessary. However, its reserving action may be reduced if non-ionic leveling agents are use.

  Resist printing of PA carpets:

  One-step method Wet-in-Wet

  Print                                    :      white or colored resist

  Nylofix-RN                          :     4 -12 g/l

  Intermediate steaming apply colorants by pouring steam, wash – off, dry.

  2. Two-Storage process

  Print                               :           white or colored resist

  Nylofix-RN                    :           4 -12 g/l

  Steam, wash – off, dry.

  3. Over dyeing:

  • Vat at 50-60°C, or Continuous or cold pad-batch process.

  • After treatment to improve the wet fastness of PA prints:

  Apply Nylofix-RN after alkaline after scouring of print, a cationic scouring agent like Altrasperse-SW, before after treatment, set a cold bath with,

  • Nylofix-RN                                      :           1 g/l
  • Acetic acid or Formic acid                   :           1 g/l

  To remove any residue of the cationic scouring agent and any loose anionic dye from the substrate, then after treat with,

  • Nylofix-RN                                                  :           1 %
  • pH (with Acetic acid or Formic acid)               :           5.0 – 6.0
  • Temperature                                                :           50°C
  • Time                                                           :           20 mins

  In continuous after treatment, e.g. padding (dry-on-wet or wet-on-wet) this should be regulated through liquor pick-up