T400 fabric dyeing and finishing process

t400 fabric dyeing and finishing process

Production and processing

1. Fabric specifications

Bio-based memory T400 (width 175cm, density l55g/m3)

2. Instruments and Equipment

Open width desizing machine, high temperature and high pressure liquid flow dyeing machine, setting machine, Mano optical weft trimmer

3. Detection method

4. Processing process

According to the physical and chemical properties of the bio-based memory T400 fabric and customer sample requirements, the main processing flow is as follows: barrel matching → white blank Unwinding → open-width desizing → cold stacking → open-width desizing → (cloth refining in machine cylinder) → dyeing → dehydration and opening → shaping → rolling of finished products.

Processing and Analysis

1. Flat width desizing

T400 fabric desizing process prescription is as follows:

Liquid soda 5%

Long car rapid desizing agent 1g/L

Emulsifying refining agent lg/L

Degreaser 0.5g/L

Ammonium tripolyphosphate lg/L

Temperature 98℃

Vehicle speed 55m/min

During the weaving process, T400 fabric is subject to greater tension and friction in the warp direction, which is prone to Breakage, in order to reduce breakage and improve weaving efficiency and gray fabric quality, the warp yarns need to be sized. However, sizing is good for weaving but not good for dyeing and finishing. The slurry film covering the surface will hinder the diffusion of dye into the fiber during the dyeing process.

Oxidation selected for this article The desizing agent has good alkali resistance stability under hot alkali conditions of 98°C. It can oxidatively decompose the ester bonds in the macromolecules of polyacrylate slurry commonly used for weaving chemical fiber fabrics into water-soluble desizing agents. The viscosity of good small molecular chain segments decreases rapidly, and then falls off from the fabric under physical gravity and dynamic conditions of the solution in the tank.

In order to exhaust the slurry and make the hydrolyzed slurry The emulsifying refining agent can make the slurry swell in water and be emulsified into a dispersed state, which is beneficial to removal. Ammonium tripolyphosphate has a good chelating effect on metal ions and can not only prevent the slurry from falling off. The material resists stains and can soften the water used for pre-treatment.

The existence of oil remover also further synergizes to enhance the desizing treatment of fabrics.

After open-width desizing treatment, the slurry, oil stains, stains, etc. on the surface of the bio-based memory T400 fabric can basically be effectively treated. Due to the effect of moisture and heat, the internal stress of the fabric is eliminated and the door width shrinks to a certain extent.

2. Cold rolling pile

The bio-based memory T400 cold rolling batch process recipe is as follows:

Liquid soda 8%

Long car rapid desizing agent lg/L

Emulsifying refining agent lg/L

Hydrogen peroxide 0.5g/L

Ammonium tripolyphosphate lg/L

Temperature room temperature

Time 24h

Since bio-based memory T400 fabric is usually stiff and feels stiff and rough, although it can be improved to some extent after open-width desizing, it still cannot meet the processing requirements of incoming samples. In order to make the hand feel soft and plump, the fabric after open-width desizing can be padded with the working fluid of the above formula to ensure that the fabric has a sufficient liquid-carrying rate, and then the liquid-carrying fabric is rolled and covered with a layer of plastic film to tie it tightly. Seal to allow full reaction at room temperature.

Since the fabric does not require special temperatures during the entire cold rolling batch pre-treatment process, there is no water or other equipment energy consumption, and the energy saving and emission reduction effect is very obvious. The stacking time is generally 24 hours, which depends on the specific feel. If it is not enough, it can be increased appropriately. However, it should be noted that excessive impregnation with caustic soda will cause some damage to the strength of the fabric.

3. Flat width desizing

For fabrics after cold rolling batch processing, they are again subjected to open width annealing. Pulp machine processing, the second flat-width desizing process prescription is as follows:

Liquid alkali 3～4%

Long car rapid desizing agent lg/L

Emulsifying refining agent lg/L

Ammonium tripolyphosphate lg/L

Temperature 65℃

Vehicle speed 65m/min

The main purpose of the second open-width desizing is to remove a large amount of alkali solution from the fabric belt during the cold pad treatment process. Due to the long time During impregnation, the alkali has reached full swelling inside and outside the fiber. If it is not cleaned, the cloth surface will be sticky and slippery in the subsequent dyeing process, resulting in uneven dyeing, stains and other defects.

4. Coloring

Since the main components of bio-based memory T400 fabric are PET and PTT, this article selects disperse dyes commonly used in polyester and uses high-temperature and high-pressure liquid flow Dyeing machine performs dyeing processing.