Textiles Bar

What is staple length in cotton? Complete definition.

Staple length is the major characteristic of cotton fiber on which cotton is traded and its price is determined. Staple length is the length of fiber. This parameter of cotton is so important that every consumer has to first decide what yarn he wants to produce and what staple length of cotton will be required to produce this yarn. In different origins staple length of fiber is spoken with different length scales like inches, MM milli meters and in USA mostly 32nds.

Here are a few staple lengths and their importance and definition also described for better understanding.

Staple length below 27 mm is considered short staple cotton and mostly used for yarn counts below 20/1 ring yarns or low quality or cheaper yarns like open end depending on the requirements of demands.

Major portion of global cotton consists of the staple length between the range of 27 to 30 mm fiber length. This sort of cotton is used to produce medium to good quality yarns. Count range mostly from 20/1 to 40/1 carded or combed for weaving or knitting.

Above this is long staple cotton with staple length 30mm to 33 mm. This cotton is used for producing fine quality yarns from 40/1 to 80/1 combed and compact yarns which are used for light weight fine quality fabrics.

Cotton with 33mm above is called ELS or Extra-long staple cotton used for very fine yarns, high strength or tenacity yarns.

If you are interested in knowing regular price updates of cotton and yarn please visit our HOME page.

What is Uniformity Index UNF in cotton testing?

Uniformity Index of UNFI is a ration of mean length with upper half mean length. it is calculated by HVI or Fibrogram cotton testing instruments.

We are giving the following details for the ideal or poor counts of Uniformity.
1. Uniformity Index of Unf below 77 is considered very low or poor uniformity.
2. Uniformity index between the range of 77 to 80 is called low uniformity.
3. Uniformity Index Unf from 80 to 84 is considered medium level. Mostly normal quality cotton contains this range.
4. Uniformity Index 85 to 87 is considered high level uniformity.
5. Uniformity Index above 87 is considered a very high level of uniformity.

What is (SFI) Short Fiber Index In cotton HVI report.

SFI Short fiber index is a very important parameter in cotton results as it determined the ratio of short fiber in cotton. SFI indicates the %age of fiber having less than half inch length. This ratio is counted on High Volume Instrument HVI, one of the latest and best cotton testing instruments being used in the textile sector. The higher SFI is usually considered bad in cotton results.

SFI below 6.00 is an indication that cotton has very less short fiber which is good for cotton consumers. But this sort of cotton is rarely available.

Normally and mostly cotton contain SFI between the range of 6 to 9 and it’s acceptable for most cotton buyers.

SFI short fiber index from 10 to 13 is considered a little higher side ratio but to some extent acceptable for the cotton consumers.

SFI short fiber index above 14 is usually not acceptable for yarn manufacturers who want to make fine quality yarns and they avoid buying cotton with such high value of SFI.

What is Rd and +b in cotton and its definition?

Both Rd and +b are the color grade parameters for cotton. Rd describes the reflectance in cotton. Higher rd indicates the brightness in cotton while lower rd reflects the dullness or grey look in cotton. Cotton having higher rd is considered the better cotton and it also adds to its value and price.
While +b in cotton indicates the yellowness in cotton. Both these units are tested or measured on fiber testing machine HVI (High Volume Instrument) Earlier Fibro graph machine was used to test the cotton results but now a days majority of labs and mills use HVI machine with latest features.

What is Imperfection or IPI in Textile yarn?

Imperfections or IPI indicate the evenness or unevenness in yarn. If the IPI / Imperfection level is high in yarn it indicates that the quality of yarn is not good. If the imperfection or IPI count is less it reflects the good quality yarn.

A lot of people ask about how to calculate or count the imperfection. its counting is very simple after reading our post.

To find the imperfection in yarn you need to have its Uster Testing Report. There you will find several colums like U%, cvb, thin, thick, neps and hairiness Etc.

Usually for ring spun yarn to count the imperfection index we take the total of (Thin-50% + Thick+50% + Neps+200 per kilometer). The total of these three parameters is called imperfection or IPI.

For Open End or Autocoro yarn to count the imperfection index we take the total of (Thin-50% + Thick+50% + Neps+280 per kilometer). The total of these three parameters is called imperfection or IPI.

What is difference between ring spun, open end and Autocoro yarn

Ring spun yarn is a better quality yarn with higher prices and higher cost of production as compare to open end or Autocoro yarns.
Ring spun yarn factory consist of the following manufacturing processes.
1. Blow Room.
2. Carding.
3. Drawing.
4. Combers or Combing process.
5. Simplex
6. Ring
7. Winding or Auto cone department
Above is the complete spinning or yarn manufacturing process engage in the ring spun yarn production.

The open end or Autocoro is same till Drawing process but after that all work is done by rotor machine which decrease the production cost but at the same time as high draft is given so the quality of yarn suffered due to high draft. This factor also affects the quality of yarns. In ring we hae wide range of options for yarn counts but in open end or autocoro we can produce limited number of yarn counts.

Following processes are engaged in open end or autocoro yarn manufacturing.
1. Blow Room.
2. Carding.
3. Drawing
4. Rotor machines.

What is difference between Open End and Autocoro Yarns.

There is no major difference between open end and autocoro yarns. The simple difference is that auto coro yarn is produced on latest machines with same manufacturing system while open end yarn is produced on old open-end machines.

Open End machine is the older version of machines. It can mostly not produce finer or higher number of counts above 20/1 oe although We can produce up to 30/1 on open end machines but we have to decrease the machine speed which decrease the production and increase the production cost. Mostly coarser counts from 6/1 oe to 16/1 oe or 20/1 oe is produced on it.

Auto Coro is the latest machine having the ability to produce yarns of fine quality with higher speed. its count range is also higher and its drafting system allow you to produce yarn counts up to 60/1 although mainly people prefer to produce yarn counts till 40/1. Autocoro production capacity is also very high as compare with open end machine.

Hope you have under stood the difference in open end and auto coro yarns. In case of any confusion please drop your question in below comments section.

Also request you to share our link with your textile friends so that more people can benefit the information provided by textiles bar.

What is difference between Carded and Combed Yarn

Every spun yarn is carded yarn in spinning process as carding is the initial process to clean the cotton with carding machine. The purpose of carding process is to clean the cotton from trash, leaf and other foreign matters. This process cleaned the cotton and straighten the fibers and converted the cotton into sliver. After this process this sliver is converted into final form of yarn. There is another process which is used to make the yarn finer by applying the combing process. the cotton which passed through this combing process is more cleaned and all the damage, entangled and floating fibers are removed from it. in comping process around 15% to 20% more cleaning of cotton is conducted. The combed yarn is much better in quality as compared with carded yarns.

Combed yarn is used to make more reliable and fine quality fabrics both in knitting and weaving. The price of this yarn is also higher than the carded yarn as more waste is drawn out from the cotton which also increased the cost of yarn production. Combed yarn run smoothly of fabric manufacturing machines than the carded yarn.

Hope you have now understood the difference between carded yarn and combed yarn. if need further clarification about which is better yarn in carded and combed yarn, please drop your question in comment section. We would be happy to answer you and help you in solving your problems.

The Best Textile Information Website

The Best Textile Information Website

Here we are going to explain you that how this is the best textile information website.
This is for the first time that a website contains updated prices of the following products.
1. All sorts of fiber price updates.
2. Price updates for all sorts of Ring Spun yarn.
3. Price updates of cotton and blended Yarns.
4. Open End and Auto Coro yarns prices.
5. DTY yarn Prices.
6. Grey fabric price updates.
7. History of New York cotton futures 2, history of China Cotton futures, history of Indian cotton prices, history of Pakistan cotton price, history of Liverpool A index, Polyester staple fiber price history and many more historical views on this best website textile information website.
8. All sort of textile calculations.
9. The best thing is that we are also providing an opportunity to textile marketers to post your product on our website and sell directly to buyers without any subscription charges.

Hope now you understand why Textiles Bar is the best information and guide for the textile professionals.

All these

What is difference between Viscose, Modal and Lyocell Fiber

Viscose, Modal and Lyocell fibers are made from tree or plant fibers after cellulosic process. Mainly soyabean, bamboo or even cotton plants are used to make this fiber. Some other plants are also used to produce Viscose, Modal and Lyocell. These fibers are also called Cellulose fibers.

Now question arises what is the difference between Viscose and Modal or what is the difference between Viscose and Lyocell or What is the difference between Modal and Lyocell.
Its answer is quite simple. which we can describe you with the example of a laptop. Like we go to the shop and ask the shopkeeper about its specification. Shopkeeper told us that this laptop is 1st generation other one with better performance is 2nd generation and this one is its 3rd generation and best of all.
Same is the case with Viscose, Modal and Lyocell.
Difference between Viscose fiber, Modal fiber and Lyocell fiber

  1. Viscose is the first generation out of these three.
  2. Modal is the 2nd generation with better quality and strength.
  3. Lyocell is the 3rd and best among these three.

Hope you have now better understanding about the difference between Viscose, Modal and Lyocell.

If you have any more question please feel free to write us in comment section.