Frequent question: How do you reduce short thick areas in yarn?

How do you reduce thickness in yarn?

Increase in twist binds the yarn more tightly together which reduces on the number of thick places/km. Considering twist and rotor speeds showed that at 4.4TM, the thick places decreased with increase in rotor speed up to 90,000rpm and then thick places increased drastically.

Which process is used to remove thick and thin places from the yarn?

A yarn clearer is a device to remove faults (thick places, thin places, foreign matter) from the yarn. Yarn clearing improves the quality of the spun yarn and hence of the cloth made of it. Clear, uniform yarn is especially important for smooth operation of high-speed textile machinery.

How do you control neps in yarn?

Carding action removes as well as generates neps. The tendency for both opening and spinning process to be shortened is favorable to the production of yarns with less neps from cottons prom to this trouble wider settings between cylinder and flats of a card make the fiber roll and tangle giving chance for neps to form.

How do you reduce a Classimat fault?

The blends with lower viscose content shows less occurrence of classimat faults. Increase in the fiber length increased the total faults but increase in the fiber denier decreased the total faults. Fiber length and denier have significant effect on A & B type of faults.

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What is yarn imperfection?

Imperfections can be defined as the total number of neps, thick and thin places in a given length of yarn. … A yarn with more imperfections will exhibit poor appearance grade, lower strength and poor performance in weaving is likely to produce fabric with low quality.

How can we determine the yarn fault?

Yarn faults are represented based on their size, length and their frequency of occurrence. In all staple spun material (yarn, rovings and slivers), the fiber distribution along the material varies.

What is yarn?

(Entry 1 of 2) 1a : a continuous often plied strand composed of either natural or man-made fibers or filaments and used in weaving and knitting to form cloth. b : a similar strand of another material (such as metal, glass, or plastic)

What is Neps removal efficiency?

Nep removal efficiency in carding is determined using the following formula [100 × (neps in the chute-feed – Neps in the carded sliver)/neps in the chute feed]. The higher the nep-removal efficiency the lower the neps in the carded sliver.

How does the setting of plate Influence flat strip waste?

The object of the Top % plate setting is to control flat strip waste. Wider front plate setting causes more flat strips waste and good cotton is lost as flat waste. If the setting is very close flat waste will be deposited on the cylinder causing poor web.

What is card cleaning efficiency?

Cleaning efficiency (MCl)

Monitoring the efficiency of cleaning and carding equipment is a good method of determining if the equipment is operating properly to get a better understanding about the actual machine performance.

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What is Classimat?

The next-generation USTER® CLASSIMAT 5 features innovative and powerful technology for defect classification and prevention. It enables both yarn producers and users to achieve significant improvements in quality consistency across an extended range of parameters.

What are objectionable faults?

These faults are also known as objectionable faults. Why these yarn faults to be avoided: causes break during post spinning operations. Detract aesthetic appeal of the fabric, if allowed to pass.

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