Non Common Causes Of Fabric Weft Shrinkage

Causes of formation,

Kink twist.

The weft is easy to twist and twist on the shuttle side.

The change of the state of the shuttle causes the pverse vibration of the weft to form a crimp kink.

The weft is pferred from the full tube to the empty pipe, and the tension increases from small to small, so that the chance of weft air balloon outside the shuttle chamber is changed accordingly.

When shuttle shuttle shuttle shuttle box, due to weft yarn itself low moisture regain, twist is not stable, shuttle yarn to the edge of a piece of yarn is very relaxed, when the shuttle moves, weft began to twist.

Meridional longitude weft is caused by improper weaving process and shuttle time.

A square shape is shrunk.

A square square is more prominent in poplin fabric.

The main reason is that when the high density poplin fabric is made, the four page heald frame opening process is caused by a single horizontal way.

The dispersed weft is mainly caused by the poor integrity of the crane.

Elimination methods

The characteristic of the weft yarn is to give wet, increase tension and adjust weft filling time.

Adjusting the opening process according to the region and the rule of the warp weft distribution, the weft yarn is straight after the combing process, such as the use of the ring traveler for a long time, and a groove is formed by friction fibers. Secondly, the air ring in the spinning process is large, which is rubbed with the gauze board and the liquid is easy to produce cotton balls.

The heald frame adopts early opening, and the heald frame adopts late opening.

The following measures shall be taken for the circular fabric to be continuously oriented.

The quality requirements of original yarn and semi finished products.

Selecting the original yarn with smaller twist as weft yarn, the cotton mixture of warp yarn should be smaller and less, the surface hairiness is less, and the yarn body is more smooth, so that the warp is not easy to take the weft yarn caused by the weft in the spindle to cause weft shrinkage.

In order to improve the clarity of the fabric and reduce the broken ends in weaving, the sizing rate of warp yarns should be higher.

Reasonable selection of weaving process parameters; cylindrical cloth on type or type shuttle loom, commonly used multi arm shedding mechanism.

The elimination method of a square square weft can be taken simultaneously from two aspects of warp and weft.

The warp yarn with higher density can be separated from each other when opening the warp, and the opening time of high-density poplin fabric will be changed from a flat heald to a two flat heald.

The specifications of the hoisting heald have the principle of small double opening.

So as to reduce the mutual friction between warp yarn and increase the clarity of opening.

Without increasing the number of broken weft and dilute defects, the weft tension will be increased, compressed air ring will be increased, and the weft winding phenomenon will be reduced.

In order to further improve the articulation of weaving, the measures to increase the tension of cloth surface can also be adopted at the same time.

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The method of eliminating and repairing dispersive Weft Defects in daily production is basically the same as solving star jumping and sinking yarns.

The main points are as follows: the hanging archway is moved forward as far as possible.

When the loom is running normally, the first page heald frame does not touch the reed cap.

It is required that the heald frame do not shake.

The shed is clear.

The hoisting ensemble should not be too low, especially for the double billet opening mechanism.

In order to prevent the reed cap from pressing the upper warp, the height of the reed can be 0.7mm.

Nylon hoisting belt can prevent elongation.

The repair of the buffer mechanism should comply with the requirements. Attention should be paid to the rebound phenomenon of the cushioning force and the shuttle.