One-bath two-step scouring and dyeing method of reactive dye of cotton knitting fabric and cotton yarn

A technology for reactive dyes and cotton knitted fabrics, applied in dyeing, textiles and papermaking, etc., can solve the problems of large difference in scouring temperature, shorten scouring and dyeing time, increase production, and be beneficial to environmental protection.

Inactive Publication Date: 2009-09-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used reactive dyes have a large difference between the fixation temperature and the scouring temperature (such as 60-65°C for reacti

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1: Light color (dye dosage 1.0%) dyeing:

[0056] (1) Dyeing formula:

[0057] Dosage of M type reactive dyes (to the fabric weight) 1.0%

[0058] Yuanming powder 30g / L

[0059] Multifunctional fixing alkali HS-310J 2.5g / L

[0060] Bath ratio 1:15

[0061] (2) Dyeing process:

[0062] At room temperature, add water, run the fabric, add dyes, add sodium sulfate and multifunctional fixation alkali, add enough water—heat up to 60°C after 40 minutes—after 30 minutes of heat preservation, heat up to 95°C after 30 minutes—after heat preservation for 30 minutes, wash with water , Soap boiled and washed.

[0063] (3) Process description:

[0064] In the dyeing process, the addition of sodium sulfate promotes dyeing and improves the dye uptake and fixation rate. However, if the dosage is too high, it is easy to cause coloring, so the light color is generally about 30-40g / L. The addition of the multifunctional fixing base (produced by Zhejiang Huasheng Chemical Products Co., ...

Embodiment 2

[0065] Example 2: Medium depth (dye dosage 3%) dyeing:

[0066] (1) Dyeing formula:

[0067] Dosage of B-type reactive dyes (to the yarn weight) 3%

[0068] Yuanming powder 50g / L

[0069] Penetrant HS-118B 1.0g / L,

[0070] Scouring agent HS-117 1.0g / L,

[0071] Soda ash 10g / L,

[0072] Bath ratio 1:10

[0073] (2) Dyeing process:

[0074] At room temperature, add water, the yarn runs, add dye, add sodium sulfate, add penetrant, scouring agent, soda ash, add enough water-35min heat up to 60℃-after 35min heat preservation, 25min heat up to 95~98℃— -After keeping the temperature for 40 minutes, wash with water, boil with soap, and wash with water.

[0075] (3) Process description:

[0076] In the dyeing process, the addition of sodium sulfate promotes dyeing and improves the dye uptake and fixation rate. However, too high a dosage is easy to produce stains, so the medium color is generally about 40-50g / L; the addition of soda ash is conducive to the reaction and combination of the dy...

Embodiment 3

[0077] Example 3: Dark color (5.0% dye amount) dyeing:

[0078] (1) Dyeing formula:

[0079] KN type reactive dye dosage (to the fabric weight) 5%

[0080] Salt 70g / L

[0081] Multifunctional fixing alkali HS-310J 3.5g / L

[0082] Bath ratio 1:8

[0083] (2) Dyeing process:

[0084] At room temperature, add water, the fabric runs, add dyes, add salt and multifunctional fixing alkali, add enough water-30min to heat up to 65℃-after 40 minutes of heat preservation, 20min to 95 °C-after 40 minutes of heat preservation, wash with water, soap Boil and wash.

[0085] (3) Process description:

[0086] The addition of salt during the dyeing process also plays a role in promoting dyeing, improving the dye uptake and fixation rate. Therefore, the dark color is generally about 70-80g / L. The addition of multifunctional fixing alkali has two major functions: one is to provide an alkali agent. The addition of alkali is beneficial to the reaction of dyes and fibers to combine and act as a washing ...

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PUM

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Abstract

The invention discloses a one-bath two-step scouring and dyeing method of reactive dye of cotton knitting fabric and cotton yarn. The formula thereof is as follows: 1.0 to 10 percent of reactive dye of B, M and KN type or K, KD and KE type (fabric or yarn weight), 30 to 100 g/L of sodium sulfate or salt, 2.5 to 3.5g/L of multifunctional color-fixing alkali with the bath ratio of 1:6 to 15; or 1.0 to 10 percent of reactive dye of B, M and KN type and K, KD and KE type, 30 to 100 g/L of sodium sulfate or salt, 0.5 to 1.0g/L of penetrating agent, 1.0 to 2.0g/L of refining agent, 10 to 15g/L of pure alkali with the bath ratio of 1:6 to 15. The scouring and dyeing process is as follows: cotton knitting fabric or cotton yarn, two-temperature scouring and dyeing (dyeing with the temperature of 60 to 65 DEG C or 80 to 90 DEG C and refining with the temperature of 95 to 98 DEG C), soaping, washing and finishing. The method improves yield, simultaneously reduces the using amount of water by about 30 percent when in scouring and dyeing, reduces production cost, reduces the discharge of sewage and is beneficial to environmental protection.

Description

Technical field [0001] The invention relates to a one-bath two-step dyeing method for cotton knitted fabrics and cotton yarn reactive dyes. Background technique [0002] Before dyeing cotton (cellulose fiber) knitted fabrics and cotton yarns, pretreatment (also called scouring) is generally required to remove impurities on the fabric or yarn. These impurities include non-cellulose substances in cotton fibers (pectin, wax and protein on cotton fibers) and possible slurry, dirt, and oil stains on the weaving process. If these impurities are not cleanly removed (not refined or the scouring effect is poor), it will inevitably affect the dyeing effect, and easily cause problems such as color stains, color spots, and decreased coloring brightness. Therefore, the current factory uses the processing method of scouring first and then dyeing. [0003] The dyeing of cotton knitted fabrics and yarns currently uses reactive dyes. Reactive dyes have the advantages of bright color, excellent co...

Claims

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Application Information

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IPC IPC(8): D06P1/38D06P3/66
Inventor 王光明章健健王成龙贾青陈琼张向南
Owner ZHEJIANG SCI-TECH UNIV
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