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Dyeing and finishing technology in fine product development and innovation (recommended collection)

Time : 2019-08-05 Hits : 11

1. Gas/liquid flow dyeing process

Traditional gas/liquid flow dyeing is mainly used for the pretreatment and dyeing of knitted or chemical fiber fabrics, while the new gas/liquid flow dyeing can meet the requirements of multi-organization, multi-style, small batch and different varieties of cotton and its multi-fiber woven fabrics, and cannot be used as a productivity supplement for continuous or cold bulk dyeing.

In product development and innovation, gas/liquid flow can realize the combination of dyeing and style finishing:

(1) loose flexible (full rigid), peng soft high elastic fabrics, especially containing polyester fabrics;

(2) surface shrinkage texture of crepe (such as cotton brocade fabric, "salt shrinkage" water dyed fabric, yarn woven with different twist coefficient);

(3) cylinder pre-treatment, dyeing natural shrinkage, natural texture of the small crepe leisure style fabric;

(4) thin fabric, jacquard fabric, double low warp and weft dense gauze fabric;

(5) suede fabric (pure cotton, polyester and brocade composite silk, the surface texture is clear, feel the wool, invisible);

High color fastness fabrics (dark wet rubbing fastness above grade 3, multi-fiber stained color above grade 4 children's wear, tooling fabrics);

7. Products containing protein fibers (such as wool, silk and rabbit hair);

"Salt shrink" linen products, TM products, thin viscose fabrics, strong twist class.

2. Traditional mercerization and "salt shrinkage"

The concentration of traditional mercerized lye is generally 23 ~ 26° Be, and the swelling of cellulose is limited. In addition, under the condition of tension, the infiltration of lye into the fiber cystic cavity will Be prevented, which is easy to cause surface mercerization. "Salt shrinkage" is the use of 36° Be lye mercerizing under tension-free conditions, making the fiber produce full swelling and contraction, the effect is to increase the color and luster of the fabric fullness, rich and tight feeling, finish and flexibility, suitable for cotton fabrics and linen fabrics. As flax fiber is bundle structure, after "salt shrinkage" treatment, it will produce more severe contraction, making the fabric fabric become more compact, producing a sense of tightness that cannot be formed through weaving. Successive or loose washing after "salt shrinkage" produces different shrinkage effects.


Fabric treated by "salt shrinkage" process

In addition, different lye can mercerize mudale and common viscose fiber, improve the color unevenness and low color saturation of 2 kinds of fiber when interwoven with cotton fiber

3. Emery grinding and biological polishing

During processing and fine dust coat fabrics, shirt fabrics, need fabric surface clean, bright and clean, clear texture, soft luster, feel is exquisite (fluff could not see, but the costumers) effect, can use first emery grinding MAO (240/400, the twelve, in view of the different fabrics are combined), and then after the biopolishing, remove the surface of the hair, get of microvilli, suede style effect.


Emery frosted and biopolished fabric

For pure tiansi TM fabric, emery grinding and bio-polishing can be used to reduce abrasives caused by raw fiber, and produce the effect of soft feel and peach skin, with even and delicate touch and high quality. This process can also be applied to polyester/nylon composite silk fabric to reduce the problem of too soft and waxy fabric caused by alkali reduction, so that it can better meet the requirements of wind coat and jacket fabric for its richness and smoothness.

4, screen coating technology

Screen coating technology is mainly used to develop single single absorption (one side anti-splash water, one side can absorb water) and two-color fabrics. Woven fabric of waterproof and moisture permeable is mainly composed of Schoeller's 3 xdry ® finishing technology, the waterproofing agent and thickener are adjusted viscosity in 16000 ~ 18000 mPa s. (normal printing paste viscosity of 4000 ~ 5000 mPa, s), for the strengthening of fabric adopts full exposure to the thickness of high nickel mesh network will waterproof slurry on the surface of the fabric in lattice arrangement form, the request is infiltration condition, realize single waterproof, wet, breathable, one-way moisture absorption perspiration function, also has a certain wind function. In shi trafigura mould coating machine, rotary screen printing machine is not of this craft, easy to print through, uneven), the scheme can realize similar to the effect of bonding PTFE film, on the production cost, durable and quality stability has bigger advantage, this kind of fabric is suitable for low intensity exercise, much used in the fashion leisure sports clothing, in the majority with the spring and autumn outfit.


Fabrics treated with 3XDRY® technology

In addition, the use of mesh coating technology can also be used to print different colors of active color, double color effect, suitable for pants, jacket fabrics.

5. Short process pretreatment technology of complex biological enzymes

Traditional cotton fabric desizing USES amylase or caustic soda/hydrogen peroxide, and USES continuous or cold reactor method to remove the size on the fabric. The disadvantage is compatibility. Amylase only decomposes starch, but has no effect on PVA. Caustic soda/hydrogen peroxide cold reactor has a certain removal effect on PVA, but it cannot remove starch slurry, and it is not suitable for multi-fiber products. In addition, there are some problems such as difficult treatment of waste water, hard feel, and easy to produce sliver.

Compound biological enzyme pretreatment process is the use of amylase, catalase, pectinase, hydrogen peroxide, non-ionic emulsifier, directly or after the singeing pad working fluid, and then heat preservation pile 12h above, after the thin cloth directly bleach, thick cloth directly boiled bleaching.

Advantages of short process pretreatment of complex enzymes include:

(1) wide adaptability of fiber, simple production control;

(2) pulp has a high removal rate and can achieve PVA degradation. It has obvious advantages in the application of high-count and high-density fabrics.

(3) it has obvious advantages in the application of high elastic and woolen fabrics;

(4) obvious advantages in energy conservation, emission reduction and consumption reduction;

(5) it can achieve the separation of sewage concentration and dilution, which is conducive to resource utilization.

(source: official account of textile guide)

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