Wastewater-discharge-free continuous dyeing process for microfiber material

Wastewater-discharge-free continuous dyeing process for microfiber material

  • CN 106,906,677 B
  • Filed: 03/27/2017
  • Issued: 09/07/2021
  • Est. Priority Date: 03/27/2017
  • Status: Active Grant
First Claim
Patent Images

1. A continuous dyeing process without wastewater discharge for nylon superfine fiber polyurethane synthetic leather is characterized by comprising the following steps:

  • s1, padding, namely dyeing the nylon superfine fiber polyurethane synthetic leather by using acid dye color paste through an alternative padding process; and

    adding an acid-releasing agent;

    s2, carrying out microwave reaction, namely boiling and vaporizing the acid dye color paste on the nylon superfine fiber polyurethane synthetic leather by using a microwave radiation device to effectively dye;

    s21, cleaning, namely padding the nylon superfine fiber polyurethane synthetic leather subjected to microwave treatment with clear water to remove floating color on the surface of the nylon superfine fiber polyurethane synthetic leather, and blending the washed color water as a part of the acid dye color paste for recycling in the step S1;

    s301, padding the nylon superfine fiber polyurethane synthetic leather by a color fixing agent;

    after padding by the color fixing agent, the liquid carrying rate is 50-80%;

    s3, shaping and drying;

    and (S2) boiling and vaporizing the acid dye color paste, wherein the liquid carrying rate of the nylon superfine fiber polyurethane synthetic leather is 8-30%.

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