Dyeing with silicone softener will encounter the problem?-Iota

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Service > Dyeing with silicone softener will encounter the problem?

Dyeing with silicone softener will encounter the problem?

Basic questions:
Former cotton fabric usually use when handling high concentrations of alkali treatment to remove impurities fabric (especially larger amount of alkali mercerized), alkali into the fiber interior is not easy to wash, dyeing (active vat dyes) also alkali, so after finishing cloth likely alkaline. And synthetic fabrics in the wash stain finish to go through reduction, dyeing currently still using hydrosulfite and caustic cleaning, if the latter does not wash clean, can also cause a soft cloth with alkali before. Ordinary silicone oil is not alkali, and will be breaking under alkaline conditions, which is the reason the plant sticky rolls when making soft padding after by several kilometers. So soft cloth must be washed before or at work alkaline agent was added acetic acid, keeping the groove PH5-6
Cohesion issues:
On the fabric contains short fibers (cotton, T / R cloth, velvet), the process will inevitably have a portion of staple fibers falling down, falling down of the cloth roll staple in the accumulation tank, and general produce cohesive silicone, with finishing solution up to the rolls, and is extruded silicone oil emulsion breaking bond together to form a sticky roller or silicon spots. The water quality is relatively poor, it will also produce with ordinary silicone sticky roller cohesion, another pile fabric similar situation also exists, before driving to do cleaning work, flower hair found at any time to clean up.
Charge stability:
Cotton used in dyes, brighteners mostly anionic, while cotton whitening basically done on setting machine. Also dyeing cloth shade wrong when you need to fine-tune color repair, repair color usually when the softening agent is added a small amount of dye or paint, while the factory generally use ordinary oil (weak cation) will produce the yin and yang of charge to attract reaction, resulting in condensation and sticky roller , and feel the softness of silicone anion also below standard, the confusion caused by the plant. Consistency must be considered in the charge processing.
Temperature question:
Long car dyed cotton cloth out to go through the drying cylinder drying, large package or heap in cloth box, if it is not sufficiently cooled, especially large package of cloth, the fabric on a soft surface temperature may be higher, causing the working fluid temperature groove (particularly in summer), sometimes to more than 60 ℃, but can also cause ordinary silicone adhesive roll good heat resistance. In rolling tank temperature does not exceed 40 ℃ as well.
Stereotypes speed problem:
Some factories do thin fabric, the setting speed is very fast, and sometimes up to 60 m / min speed, the general silicon oil is not good due to the permeability, causing the silicone oil to the roll back, and the resulting sticky roller. Note that the working fluid replacement rolling groove, ground wipe roll
James cylinder problem:
Many factories are doing when impregnated soft, ordinary silicone oil gets on the cylinder wall, over time, will form some black oil spots on the cylinder wall to form a silicone oil spots stained cloth surface. Strengthening cleaning work
Handle problems
Now that the market for fabric handle the increasingly high demand, and a variety of fabrics due to the different seasons, different customer requirements, the need to show a variety of different styles requirements, require smooth drape, and slip and active, and fluffy, pure elasticity and so on. One silicone oil generally only reflect the kind of style. Thus causing many factories to use a wide variety of fluids, resulting in the production is a bit confusing, and sometimes can not find suitable silicone customer requirements, only to give up the business, resulting in losses. We can choose different values for different amino end groups of the amino silicone oil to control molecular weight and molecular distribution of the reaction with ammonia, and the viscosity difference between the value of amino silicone oil, and then soft, smooth fibers meet the requirements of elasticity
Costs
Currently the biggest problem for dyeing confusion is the cost issue, due to water, electricity, gas prices are rising, and printing fees, but reduced, resulting in a lot of printing and dyeing mill busy for a year, but basically no profit, cost control is therefore dyeing plant to solve the problem. After finishing auxiliaries fee is a bulk dyeing and finishing auxiliaries and therefore reduce the cost of the dyeing urgent problem.
Yellowing problem
Thermal yellowing: a fabric yellowing amino silicone retention stop operation for a long time in the air oxidation of the amino hydrogen is liable to be oxidized to form a chromophore, and yellow. Product turns brown, brown and the white fabric looks like losing the basic white or simply yellow. pH is too high, the fabric along the drying temperature is too high when the substances yellow cotton. Strengthening process control. Storage yellowing. Contamination caused by the storage of gas

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