Knowledge shearing about Spinning & some definition


100% cotton
In this type of yarn the fiber used in the yarn is fully natural cotton fiber.


Viscose:
This is also called regenerated yarn. In this process the used fiber is produced from the cellulose of eucalyptus tree. The melted cellulose of this tree is passed through spinneret and viscose fiber is produced and this fiber used for making yarn.

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It is one kind of modified viscose. By increasing the strength and luster of viscose this type of yarn is produced.


Blended
Different fibers are combined to make a definite type of yarn in this process.

Organic yarn
When yarn is spun from the cottons which are produced in the field where no fertilizer and pesticides are used then they are known as organic cotton. The standard of their quality is lower than the other natural cotton.

Special Featured Yarn

Slub
The yarn has got thick and thin places along its length. By varying the amount of drafting in different processes of spinning slub yarn is produced.

Multi-count
When the slub length is almost one meter or greater then this type of yarn is called multi-count.

Multi-twisted yarn
The amount of twist is varied along the length of the yarn and this type of yarn is produced.

Important Criteria of Fiber
  • Length
  • Strength:
  • Fineness:
  • Maturity:
  • Short fiber content
  • Color
Short notes on these are given below
  • Length
 The greater the length of fiber the better the quality of yarn

  • Strength:
 The force needed to break a fiber determines its strength. Good quality yarn has better strength. Strength depends on length, dyeing of fiber.

  • Fineness:
The extent to which the fibers are thick or thin determines the fineness of fiber. When the yarn is made up of thin fibers then its color absorbing power is higher. And thicker fiber causes less color absorption. But when thick and thin is mixed up then the dye absorption is not uniform.

·   Maturity:
In the cotton plant when the cotton ball cracks and cotton can be seen then it is assumed that the cotton is matured. But if the plucking is done before the right time then that immature cotton is a bit sticky and it causes neps. The dye absorbing ability of immature fiber is quite low because of these neps. White spike can be seen in this case.

  • Short fiber content
If the fiber length is calculated in a certain amount of cotton then some fibers are found of very short length. Less amount of short fiber is desirable. It creates thick places and also hairiness along the length of yarn.

  • Color
Uniform color of fiber is expected. Bleaching needs different amount of chemical for different colors of yarn. Over bleaching can cause reduction in strength. Uniform color can ensure required amount of bleaching.
Yellowness is determined by using +b scale.

The glossiness of yarn is a good quality feature and Rd (Reflective distance) measures this feature.

Important Terms of Spinning

Unit of yarn: different types of unit system of yarn are widely used.

  • Indirect system: in this system, the length of yarn in one unit weight is calculated. Here,
1 hank= 840 yards of yarn.
            1 count = amount of hank in one pound of yarn.
This is also known as English Cotton System, Nec.

  • Direct system: the unit used in this system is Tex.

Spandex: This is a kind of elastomeric filament. A popular brand producing this type of filament is Lycra.
Bale Management

Bale management is done at the starting of the yarn spinning process. It refers to the process where bales of different cotton are arranged in such a way so that the proportions of various types of cotton remain same in all the lot.

If you like it, please don’t forget to put your valuable comments
By,

MD Shakhawat Hossain

B.sc in Textile Engineer

Executive of Marketing

Facebook : shakhawat.rasel

Skype : shrtex

E-Mail : shrtex@gmail.com

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