Fiber Sizing Should Be Considered In Sizing Auxiliaries.

It is difficult to achieve the required sizing effect when using one or several main sizes when sizing. It is necessary to use various auxiliary materials or auxiliaries to improve the performance of the slurry.

The use of auxiliaries is small, but there are many varieties and different properties. Only by fully understanding the characteristics of various auxiliaries can we correctly select the types of auxiliaries and improve the sizing quality according to the types of fibers, yarn structure, fabric specifications, weaving conditions and characteristics of the main slurry itself.

The selection and use of auxiliaries are closely related to sizing effect, and their uses are manifold.

When a certain type of auxiliaries are used to get better results in a certain area, they often produce unfavorable results on the other hand.

In order to make the film soft and round, grease is often used, but the oil will weaken the strength of the serous membrane and the adhesive force of the pulp to the fiber, thereby reducing the abrasion resistance and the enhancement rate of the sizing.

Therefore, it is very important to choose the type and dosage of the auxiliaries correctly.

First of all, there should be any temperature below 100 degrees Celsius which can be mixed with other slurry to form homogeneous slurry. It does not volatilize or decompose at high temperature, and there should be no chemical reaction that deteriorates the quality of slurry between all kinds of slurry. It should not damage the fiber properties, and has no corrosion effect on the parts, and is easy to desalter.

Secondly, the use of auxiliaries can not affect finishing after printing, and does not damage the fabric style.

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More importantly, the price is reasonable, the source is adequate, and the use is convenient.

Under normal conditions, the amount and type of auxiliaries should be used as little as possible when weaving conditions are met.

Commonly used auxiliaries are: surfactants, oils, waxes, preservatives, etc.

When sizing, it is desirable not only to have a more complete film on the surface of the yarn, but also to have a certain amount of slurry immersed in the yarn. Therefore, a proper amount of surfactant should be used.

The concentration of surfactants in the slurry should be slightly higher than the critical micelle concentration, and the concentration is too high. It will not only cause no effect, but also cause the aggregation of molecules, which will bring adverse effects on the technological properties of the slurry.

Anionic and non release surfactants are generally used as auxiliaries for sizing agents.

Surfactants are divided into wetting agents, penetrating agents, dispersants, antistatic agents, emulsifiers, defoamers and foaming agents in warp sizing.

Commonly used soaking agents are Turkey red oil, sallow oil, brown or yellow oily liquid, and soaking agent for textile, and O, 5881D, soap and so on.

There should not be too much impregnating agent, otherwise the slurry will blister easily.

When sizing agent is added with emulsifier in the slurry, the emulsifier molecules adsorb on the two phase interface and form an adsorption layer.

It is worth noting that since NPEO and NP are all non degradable substances, NPEO, OPEO, NP and OP in APEO have been included in the detection range since January 2012 and can not be used.

Enterprises should switch to environmentally-friendly emulsifiers such as isomeric 13 alcohol series.

In weaving process, yarn tends to form electrostatic accumulation. Adjacent warps are easy to intertwine, resulting in unclear weaving, flying flowers and dust gathering, which will affect the smooth progress of weaving.

Suitable antistatic agents can be added in sizing to reduce static electricity during weaving, improve weaving efficiency and improve fabric quality.

Antistatic agent can form continuous conductive mould on the surface of the fiber, increase the conductivity of the fiber material, reduce the surface resistivity, and make the generated static electricity leak quickly, so as to achieve the effect of eliminating static electricity.

In addition, if the slurry bubble is too high, the sizing rate is not easy to master, and defoamer can be used.

It is recommended to use solid silicone as the first defoamer when partial alcoholysis of PVA slurry is used. If the amount of starch in the slurry is large and the protein content is high, the three butyl phosphate can be recommended.

Different defoamer should be selected for different types of foam. When necessary, mixing can be considered to achieve the ultimate goal of less dosage and better effect.