Chemical fiber oil

Foreign smoothing and softening agents have developed rapidly. The varieties developed include fatty acid polyoxyethylene ester, polyglycol laurate, hydrogenated castor oil polyoxyethylene ether, polyoxyethylene fatty amine, polyglycol sorbitan oleate, polyoxyethylene castor oil, alkyl polyoxyethylene ether sulfate, polyoxyethylene stearate, polyglycol stearate and sorbitan anhydride stearate, etc. Among them, fatty acid polyoxyethylene ester or fatty acid ester is a dual-function oil component, which not only has the antistatic function, but also has the performance of improving the static friction D-friction coefficient of the fiber, so that the fiber has a good bunching property. And the double ester can effectively reduce the friction coefficient between the fibers, so that the fibers have good smoothness. Important products include Anco Vel EP, Atlasg 1045, Ricox-20, Sor omin SG, etc. Silicone resins can also be used as smoothing agents, as well as defoaming. When used, it is first emulsified with an emulsifier to form an O/W type stable emulsion, and then added to the dry fiber spinning process.

The domestic smoothing agents are octyl polyoxyethylene ether, sorbitan anhydride stearate monoester, polyoxyethylene stearate xylitol ester, fatty alcohol polyoxyethylene, distearamide triethylamine propylene oxide quaternary ammonium chloride, polyoxyethylene stearate polyoxyethylene ester, sorbitan anhydride grease ester and sorbitan anhydride stearate polyoxyethylene ether, etc.

buncher

When spinning, in order to prevent the disturbance of the tow, it is required that the oil must be good to the bunching of the fiber. Therefore, it is necessary to increase the μS(F/F) and molecular force to meet the requirements of fiber bunching. Therefore, the components with good adhesion to fiber and good cohesion of oil should be selected. Generally, high fatty acid triethanolamine salt, sulfonated castor oil ester salt, alkylolamide carbohydrate or ether non-ionic surfactants and betaine amphoteric surfactants are used. To determine the bunching quality, the oil-free chemical fiber can be soaked in 2% oil for 5min, removed, hung for 24h, and observed the extent of the spread of the tow section when cut under 20CN tension.

Antistatic agent

Chemical fiber is different from natural fiber, its surface does not have natural oil, moisture absorption and electrical conductivity are poor, so when the chemical fiber in the spinning and processing process, fiber and fiber, fiber and machine parts friction between the static electricity will be generated, because the chemical fiber itself is very strong insulation, not easy to conduct electricity, static charge is difficult to escape. When static electricity accumulates to a certain extent, it will produce a series of problems, especially in the case of low temperature and humidity, fine densification, fast machine speed, etc., the static electricity problem is more prominent, such as divergence of silk strips, poor molding of silk drums, wool, broken ends, winding rolls, doubling length fibers when short fibers are cut, and cloud spots when spinning mills comb cotton. Even when the roller is wrapped, and the horn is blocked when the knitting is broken, so the antistatic property is one of the most important properties of chemical fiber oil. The effect of static electricity can be eliminated by adding antistatic agent to the oil. According to the mechanism of generating static electricity, antistatic agents can be divided into conductive antistatic agents and inhibitory antistatic agents (such as alkyl phosphate, fatty alcohol polyoxyethylene ether). The antistatic agent content is generally 5% to 20%.

Commonly used antistatic agents also alkyl sulfonate, alkyl phenol polyoxyethylene ether sulfate salt, antistatic agent SN, polyether, antistatic agent TM and so on. Alkyl phosphate salt has good heat resistance and low thermal volatility, and can be used as oil component to increase oil film strength, reduce wear, improve carding state and reduce winding phenomenon. In the specific use, but also according to the type of fiber and antistatic requirements, in the selection of fatty acid carbon number, neutralizer type of screening. Generally, low carbon alcohol phosphate salt has good antistatic property and poor smoothness, while high carbon alcohol phosphate salt has slightly poor antistatic property, but good smoothness. For deformed silk, the choice of β-alkyl sulfonate (R=C12-C14), the effect is better.

New antistatic agents currently under development are: Alkyl phosphate diethanolamine, fatty alcohol polyoxyethylene ether, polyoxyethylene xylitol monooleate, alkyl polyoxyethylene ether sodium phosphate, octyl phenol polyoxyethylene ether, soybean dimethyl hydroxyethyl quaternary ammonium ethyl sulfate and octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, among which the most used are alkyl phosphate salt, alkyl ether phosphate salt and alkyl sulfate salt. And it is often a mixture of single and double esters. They have good antistatic property and smoothness, and good heat resistance, small thermal volatility, can increase the strength of the oil film.